1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 43ee73f9a5SJeff Layton #include <linux/iversion.h> 44c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 45c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 489a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 49e5a185c2SLukas Czerner #include <linux/fs_context.h> 50e5a185c2SLukas Czerner #include <linux/fs_parser.h> 51bfff6873SLukas Czerner 523dcf5451SChristoph Hellwig #include "ext4.h" 534a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 543dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 55ac27a0ecSDave Kleikamp #include "xattr.h" 56ac27a0ecSDave Kleikamp #include "acl.h" 573661d286STheodore Ts'o #include "mballoc.h" 580c9ec4beSDarrick J. Wong #include "fsmap.h" 59ac27a0ecSDave Kleikamp 609bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 619bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 629bffad1eSTheodore Ts'o 630b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6459ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 65e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 669f6200bbSTheodore Ts'o 67617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 68ac27a0ecSDave Kleikamp unsigned long journal_devnum); 692adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 702d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 714392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7211215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 73617ba13bSMingming Cao struct ext4_super_block *es); 7411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 75617ba13bSMingming Cao struct ext4_super_block *es); 76617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 77617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 78c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 79c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 88b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 89e6e268cbSLukas Czerner struct super_block *sb); 906e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb); 9102f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 92cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 93cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 94cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 95cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 96cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 97ac27a0ecSDave Kleikamp 98e74031fdSJan Kara /* 99e74031fdSJan Kara * Lock ordering 100e74031fdSJan Kara * 101e74031fdSJan Kara * page fault path: 102d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 103d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * buffered write path: 106c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 107e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 108e74031fdSJan Kara * i_data_sem (rw) 109e74031fdSJan Kara * 110e74031fdSJan Kara * truncate: 111d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 112d4f5258eSJan Kara * page lock 113d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1141d39834fSNikolay Borisov * i_data_sem (rw) 115e74031fdSJan Kara * 116e74031fdSJan Kara * direct IO: 117c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1181d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 119e74031fdSJan Kara * 120e74031fdSJan Kara * writepages: 121e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 122e74031fdSJan Kara */ 123e74031fdSJan Kara 12402f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12502f960f8SLukas Czerner .parse_param = ext4_parse_param, 126cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 127cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 128cebe85d5SLukas Czerner .free = ext4_fc_free, 12902f960f8SLukas Czerner }; 13002f960f8SLukas Czerner 13102f960f8SLukas Czerner 132c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1332035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1342035e776STheodore Ts'o .owner = THIS_MODULE, 1352035e776STheodore Ts'o .name = "ext2", 136cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 137cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1382035e776STheodore Ts'o .kill_sb = kill_block_super, 1392035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1402035e776STheodore Ts'o }; 1417f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 142fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1432035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1442035e776STheodore Ts'o #else 1452035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1462035e776STheodore Ts'o #endif 1472035e776STheodore Ts'o 1482035e776STheodore Ts'o 149ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 150ba69f9abSJan Kara .owner = THIS_MODULE, 151ba69f9abSJan Kara .name = "ext3", 152cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 153cebe85d5SLukas Czerner .parameters = ext4_param_specs, 154ba69f9abSJan Kara .kill_sb = kill_block_super, 155ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 156ba69f9abSJan Kara }; 1577f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 158fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 159ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 160bd81d8eeSLaurent Vivier 161fa491b14Szhangyi (F) 162fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 163fa491b14Szhangyi (F) bh_end_io_t *end_io) 164fa491b14Szhangyi (F) { 165fb265c9cSTheodore Ts'o /* 166fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 167fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 168fa491b14Szhangyi (F) * recheck the buffer contents. 169fa491b14Szhangyi (F) */ 170fa491b14Szhangyi (F) clear_buffer_verified(bh); 171fa491b14Szhangyi (F) 172fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 173fa491b14Szhangyi (F) get_bh(bh); 174fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 175fa491b14Szhangyi (F) } 176fa491b14Szhangyi (F) 177fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 178fa491b14Szhangyi (F) bh_end_io_t *end_io) 179fa491b14Szhangyi (F) { 180fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 181fa491b14Szhangyi (F) 182fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 183fa491b14Szhangyi (F) unlock_buffer(bh); 184fa491b14Szhangyi (F) return; 185fa491b14Szhangyi (F) } 186fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 187fa491b14Szhangyi (F) } 188fa491b14Szhangyi (F) 189fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 190fa491b14Szhangyi (F) { 191fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 192fa491b14Szhangyi (F) 193fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 194fa491b14Szhangyi (F) unlock_buffer(bh); 195fa491b14Szhangyi (F) return 0; 196fa491b14Szhangyi (F) } 197fa491b14Szhangyi (F) 198fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 199fa491b14Szhangyi (F) 200fa491b14Szhangyi (F) wait_on_buffer(bh); 201fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 202fa491b14Szhangyi (F) return 0; 203fa491b14Szhangyi (F) return -EIO; 204fa491b14Szhangyi (F) } 205fa491b14Szhangyi (F) 206fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 207fa491b14Szhangyi (F) { 208fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 209fa491b14Szhangyi (F) if (wait) 210fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 211fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 212fa491b14Szhangyi (F) return 0; 213fa491b14Szhangyi (F) } 214fa491b14Szhangyi (F) if (wait) { 215fa491b14Szhangyi (F) wait_on_buffer(bh); 216fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 217fa491b14Szhangyi (F) return 0; 218fa491b14Szhangyi (F) return -EIO; 219fa491b14Szhangyi (F) } 220fa491b14Szhangyi (F) return 0; 221fa491b14Szhangyi (F) } 222fa491b14Szhangyi (F) 223fb265c9cSTheodore Ts'o /* 2248394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 225fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 226fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 227fb265c9cSTheodore Ts'o * return. 228fb265c9cSTheodore Ts'o */ 2298394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2308394a6abSzhangyi (F) sector_t block, int op_flags, 2318394a6abSzhangyi (F) gfp_t gfp) 232fb265c9cSTheodore Ts'o { 2332d069c08Szhangyi (F) struct buffer_head *bh; 2342d069c08Szhangyi (F) int ret; 235fb265c9cSTheodore Ts'o 2368394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 237fb265c9cSTheodore Ts'o if (bh == NULL) 238fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 239cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 240fb265c9cSTheodore Ts'o return bh; 2412d069c08Szhangyi (F) 2422d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2432d069c08Szhangyi (F) if (ret) { 244fb265c9cSTheodore Ts'o put_bh(bh); 2452d069c08Szhangyi (F) return ERR_PTR(ret); 2462d069c08Szhangyi (F) } 2472d069c08Szhangyi (F) return bh; 248fb265c9cSTheodore Ts'o } 249fb265c9cSTheodore Ts'o 2508394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2518394a6abSzhangyi (F) int op_flags) 2528394a6abSzhangyi (F) { 2538394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2548394a6abSzhangyi (F) } 2558394a6abSzhangyi (F) 2568394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2578394a6abSzhangyi (F) sector_t block) 2588394a6abSzhangyi (F) { 2598394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2608394a6abSzhangyi (F) } 2618394a6abSzhangyi (F) 2625df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2635df1d412Szhangyi (F) { 2645df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2655df1d412Szhangyi (F) 2665df1d412Szhangyi (F) if (likely(bh)) { 2675df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2685df1d412Szhangyi (F) brelse(bh); 2695df1d412Szhangyi (F) } 270c197855eSStephen Hemminger } 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2739aa5d32bSDmitry Monakhov struct ext4_super_block *es) 274a9c47317SDarrick J. Wong { 275a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 276a9c47317SDarrick J. Wong return 1; 277a9c47317SDarrick J. Wong 278a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27906db49e6STheodore Ts'o } 280a9c47317SDarrick J. Wong 281bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 282a9c47317SDarrick J. Wong struct ext4_super_block *es) 283a9c47317SDarrick J. Wong { 284a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 285a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 286a9c47317SDarrick J. Wong __u32 csum; 287a9c47317SDarrick J. Wong 288a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 289a9c47317SDarrick J. Wong 290a9c47317SDarrick J. Wong return cpu_to_le32(csum); 291a9c47317SDarrick J. Wong } 292a9c47317SDarrick J. Wong 293a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 294a9c47317SDarrick J. Wong struct ext4_super_block *es) 295a9c47317SDarrick J. Wong { 296a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 297a9c47317SDarrick J. Wong return 1; 298a9c47317SDarrick J. Wong 299a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 300a9c47317SDarrick J. Wong } 301a9c47317SDarrick J. Wong 302a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 303a9c47317SDarrick J. Wong { 30406db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 30506db49e6STheodore Ts'o 3069aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 307a9c47317SDarrick J. Wong return; 308a9c47317SDarrick J. Wong 309a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 310a9c47317SDarrick J. Wong } 311a9c47317SDarrick J. Wong 3128fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3138fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 314bd81d8eeSLaurent Vivier { 3153a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3168fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3178fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 318bd81d8eeSLaurent Vivier } 319bd81d8eeSLaurent Vivier 3208fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3218fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 322bd81d8eeSLaurent Vivier { 3235272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3248fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3258fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 326bd81d8eeSLaurent Vivier } 327bd81d8eeSLaurent Vivier 3288fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3298fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 330bd81d8eeSLaurent Vivier { 3315272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3328fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3338fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 334bd81d8eeSLaurent Vivier } 335bd81d8eeSLaurent Vivier 336021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 337560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 338560671a0SAneesh Kumar K.V { 339560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 340560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 341560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 342560671a0SAneesh Kumar K.V } 343560671a0SAneesh Kumar K.V 344560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 345560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 346560671a0SAneesh Kumar K.V { 347560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 348560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 349560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 350560671a0SAneesh Kumar K.V } 351560671a0SAneesh Kumar K.V 352560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 353560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 354560671a0SAneesh Kumar K.V { 355560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 356560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 357560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 358560671a0SAneesh Kumar K.V } 359560671a0SAneesh Kumar K.V 360560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 361560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 362560671a0SAneesh Kumar K.V { 363560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 364560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 365560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 366560671a0SAneesh Kumar K.V } 367560671a0SAneesh Kumar K.V 3688fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3698fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 370bd81d8eeSLaurent Vivier { 3713a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3728fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3738fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 374bd81d8eeSLaurent Vivier } 375bd81d8eeSLaurent Vivier 3768fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3778fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 378bd81d8eeSLaurent Vivier { 3795272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3808fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3818fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 382bd81d8eeSLaurent Vivier } 383bd81d8eeSLaurent Vivier 3848fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3858fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 386bd81d8eeSLaurent Vivier { 3875272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3888fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3898fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 390bd81d8eeSLaurent Vivier } 391bd81d8eeSLaurent Vivier 392021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 393560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 394560671a0SAneesh Kumar K.V { 395560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 396560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 397560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 398560671a0SAneesh Kumar K.V } 399560671a0SAneesh Kumar K.V 400560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 401560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 402560671a0SAneesh Kumar K.V { 403560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 404560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 405560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 406560671a0SAneesh Kumar K.V } 407560671a0SAneesh Kumar K.V 408560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 409560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 410560671a0SAneesh Kumar K.V { 411560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 412560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 413560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 414560671a0SAneesh Kumar K.V } 415560671a0SAneesh Kumar K.V 416560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 417560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 418560671a0SAneesh Kumar K.V { 419560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 420560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 421560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 422560671a0SAneesh Kumar K.V } 423560671a0SAneesh Kumar K.V 424c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4256a0678a7SArnd Bergmann { 4266a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4276a0678a7SArnd Bergmann 4286a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4296a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4306a0678a7SArnd Bergmann } 4316a0678a7SArnd Bergmann 4326a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4336a0678a7SArnd Bergmann { 4346a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4356a0678a7SArnd Bergmann } 4366a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 437c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 438c92dc856SJan Kara ktime_get_real_seconds()) 4396a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4406a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 441d3d1faf6SCurt Wohlgemuth 442bdfe0cbdSTheodore Ts'o /* 443bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 444bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 445bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 446bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 447bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 448bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 449bdfe0cbdSTheodore Ts'o */ 450bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 451bdfe0cbdSTheodore Ts'o { 452bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 453bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 454bdfe0cbdSTheodore Ts'o 455bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 456bdfe0cbdSTheodore Ts'o } 457bdfe0cbdSTheodore Ts'o 45818aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45918aadd47SBobi Jam { 46018aadd47SBobi Jam struct super_block *sb = journal->j_private; 46118aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 46218aadd47SBobi Jam int error = is_journal_aborted(journal); 4635d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 46418aadd47SBobi Jam 4655d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 466a0154344SDaeho Jeong 467a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 468a0154344SDaeho Jeong 46918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4705d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4715d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4725d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 47318aadd47SBobi Jam list_del_init(&jce->jce_list); 47418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47518aadd47SBobi Jam jce->jce_func(sb, jce, error); 47618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47718aadd47SBobi Jam } 47818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47918aadd47SBobi Jam } 4801c13d5c0STheodore Ts'o 481afb585a9SMauricio Faria de Oliveira /* 482afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 483afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 484afb585a9SMauricio Faria de Oliveira * 485afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 486afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 487afb585a9SMauricio Faria de Oliveira * to write protect the pages. 488afb585a9SMauricio Faria de Oliveira * 489afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 490afb585a9SMauricio Faria de Oliveira */ 491afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 492afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 493afb585a9SMauricio Faria de Oliveira void *data) 494afb585a9SMauricio Faria de Oliveira { 495afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 496afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 497afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 498afb585a9SMauricio Faria de Oliveira 499afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 500afb585a9SMauricio Faria de Oliveira do { 501afb585a9SMauricio Faria de Oliveira /* 502afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 503afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 504afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 505afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 506afb585a9SMauricio Faria de Oliveira * properly. 507afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 508afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 509afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 510afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 511afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 512afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 513afb585a9SMauricio Faria de Oliveira */ 514afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 515afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 516afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 517afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 518afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 519afb585a9SMauricio Faria de Oliveira goto out; 520afb585a9SMauricio Faria de Oliveira } 521afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 522afb585a9SMauricio Faria de Oliveira 523afb585a9SMauricio Faria de Oliveira out: 524afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 525afb585a9SMauricio Faria de Oliveira } 526afb585a9SMauricio Faria de Oliveira 527afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 528afb585a9SMauricio Faria de Oliveira { 529afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 530afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 531afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 532afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 533afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 534afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 535afb585a9SMauricio Faria de Oliveira }; 536afb585a9SMauricio Faria de Oliveira 537afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 538afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 539afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 540afb585a9SMauricio Faria de Oliveira } 541afb585a9SMauricio Faria de Oliveira 542afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 543afb585a9SMauricio Faria de Oliveira { 544afb585a9SMauricio Faria de Oliveira int ret; 545afb585a9SMauricio Faria de Oliveira 546afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 547afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 548afb585a9SMauricio Faria de Oliveira else 549afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 550afb585a9SMauricio Faria de Oliveira 551afb585a9SMauricio Faria de Oliveira return ret; 552afb585a9SMauricio Faria de Oliveira } 553afb585a9SMauricio Faria de Oliveira 554afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 555afb585a9SMauricio Faria de Oliveira { 556afb585a9SMauricio Faria de Oliveira int ret = 0; 557afb585a9SMauricio Faria de Oliveira 558afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 559afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 560afb585a9SMauricio Faria de Oliveira 561afb585a9SMauricio Faria de Oliveira return ret; 562afb585a9SMauricio Faria de Oliveira } 563afb585a9SMauricio Faria de Oliveira 5641dc1097fSJan Kara static bool system_going_down(void) 5651dc1097fSJan Kara { 5661dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5671dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5681dc1097fSJan Kara } 5691dc1097fSJan Kara 57002a7780eSJan Kara struct ext4_err_translation { 57102a7780eSJan Kara int code; 57202a7780eSJan Kara int errno; 57302a7780eSJan Kara }; 57402a7780eSJan Kara 57502a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 57602a7780eSJan Kara 57702a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58702a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58802a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 58902a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 59002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 59102a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 59202a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 59302a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 59402a7780eSJan Kara }; 59502a7780eSJan Kara 59602a7780eSJan Kara static int ext4_errno_to_code(int errno) 59702a7780eSJan Kara { 59802a7780eSJan Kara int i; 59902a7780eSJan Kara 60002a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 60102a7780eSJan Kara if (err_translation[i].errno == errno) 60202a7780eSJan Kara return err_translation[i].code; 60302a7780eSJan Kara return EXT4_ERR_UNKNOWN; 60402a7780eSJan Kara } 60502a7780eSJan Kara 6062d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60740676623SJan Kara __u32 ino, __u64 block, 60840676623SJan Kara const char *func, unsigned int line) 60940676623SJan Kara { 610c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 61140676623SJan Kara 61202a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 61302a7780eSJan Kara if (error == 0) 61402a7780eSJan Kara error = EFSCORRUPTED; 615c92dc856SJan Kara 616c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 617c92dc856SJan Kara sbi->s_add_error_count++; 618c92dc856SJan Kara sbi->s_last_error_code = error; 619c92dc856SJan Kara sbi->s_last_error_line = line; 620c92dc856SJan Kara sbi->s_last_error_ino = ino; 621c92dc856SJan Kara sbi->s_last_error_block = block; 622c92dc856SJan Kara sbi->s_last_error_func = func; 623c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 624c92dc856SJan Kara if (!sbi->s_first_error_time) { 625c92dc856SJan Kara sbi->s_first_error_code = error; 626c92dc856SJan Kara sbi->s_first_error_line = line; 627c92dc856SJan Kara sbi->s_first_error_ino = ino; 628c92dc856SJan Kara sbi->s_first_error_block = block; 629c92dc856SJan Kara sbi->s_first_error_func = func; 630c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 63140676623SJan Kara } 632c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 63340676623SJan Kara } 63440676623SJan Kara 635ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 636ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 637ac27a0ecSDave Kleikamp * 638ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 639617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 640ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 641ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 642ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 643ac27a0ecSDave Kleikamp * write out the superblock safely. 644ac27a0ecSDave Kleikamp * 645dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 646d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 647ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 648014c9caaSJan Kara * 649014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 650014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 651014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 652014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 653014c9caaSJan Kara * at a critical moment in log management. 654ac27a0ecSDave Kleikamp */ 655e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 656e789ca0cSJan Kara __u32 ino, __u64 block, 657e789ca0cSJan Kara const char *func, unsigned int line) 658ac27a0ecSDave Kleikamp { 659b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6602d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 661b08070ecSJan Kara 662e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 663327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 664327eaf73STheodore Ts'o WARN_ON_ONCE(1); 665327eaf73STheodore Ts'o 6662d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6679b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 668ac27a0ecSDave Kleikamp if (journal) 669dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6702d01ddc8SJan Kara } 6712d01ddc8SJan Kara 6722d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6732d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6742d01ddc8SJan Kara /* 6752d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6762d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6772d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6782d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6792d01ddc8SJan Kara */ 680bb9464e0Syangerkun if (continue_fs && journal) 6812d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6822d01ddc8SJan Kara else 6832d01ddc8SJan Kara ext4_commit_super(sb); 6842d01ddc8SJan Kara } 6852d01ddc8SJan Kara 6861dc1097fSJan Kara /* 6871dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6881dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6891dc1097fSJan Kara * disabled. 6901dc1097fSJan Kara */ 691014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 692617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 693ac27a0ecSDave Kleikamp sb->s_id); 694ac27a0ecSDave Kleikamp } 695ac2f7ca5SYe Bin 696ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 697ac2f7ca5SYe Bin return; 698ac2f7ca5SYe Bin 699014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 700014c9caaSJan Kara /* 701014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 702014c9caaSJan Kara * ->s_flags update 703014c9caaSJan Kara */ 704014c9caaSJan Kara smp_wmb(); 705014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7064327ba52SDaeho Jeong } 707ac27a0ecSDave Kleikamp 708c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 709c92dc856SJan Kara { 710c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 711c92dc856SJan Kara s_error_work); 7122d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7132d01ddc8SJan Kara handle_t *handle; 714c92dc856SJan Kara 7152d01ddc8SJan Kara /* 7162d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7172d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7182d01ddc8SJan Kara * updates. 7192d01ddc8SJan Kara * 7202d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7212d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7222d01ddc8SJan Kara */ 7232d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 724558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7252d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7262d01ddc8SJan Kara if (IS_ERR(handle)) 7272d01ddc8SJan Kara goto write_directly; 728558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7292d01ddc8SJan Kara jbd2_journal_stop(handle); 7302d01ddc8SJan Kara goto write_directly; 7312d01ddc8SJan Kara } 7322d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 733558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 734558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 735558d6450SYe Bin "superblock detected"); 736558d6450SYe Bin clear_buffer_write_io_error(sbh); 737558d6450SYe Bin set_buffer_uptodate(sbh); 738558d6450SYe Bin } 739558d6450SYe Bin 740558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7412d01ddc8SJan Kara jbd2_journal_stop(handle); 7422d01ddc8SJan Kara goto write_directly; 7432d01ddc8SJan Kara } 7442d01ddc8SJan Kara jbd2_journal_stop(handle); 745d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7462d01ddc8SJan Kara return; 7472d01ddc8SJan Kara } 7482d01ddc8SJan Kara write_directly: 7492d01ddc8SJan Kara /* 7502d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7512d01ddc8SJan Kara * out and hope for the best. 7522d01ddc8SJan Kara */ 7534392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 754d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 755ac27a0ecSDave Kleikamp } 756ac27a0ecSDave Kleikamp 757efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 758efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 759efbed4dcSTheodore Ts'o "EXT4-fs error") 760efbed4dcSTheodore Ts'o 76112062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 762014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 76354d3adbcSTheodore Ts'o const char *fmt, ...) 764ac27a0ecSDave Kleikamp { 7650ff2ea7dSJoe Perches struct va_format vaf; 766ac27a0ecSDave Kleikamp va_list args; 767ac27a0ecSDave Kleikamp 7680db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7690db1ff22STheodore Ts'o return; 7700db1ff22STheodore Ts'o 771ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 772efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 773ac27a0ecSDave Kleikamp va_start(args, fmt); 7740ff2ea7dSJoe Perches vaf.fmt = fmt; 7750ff2ea7dSJoe Perches vaf.va = &args; 776efbed4dcSTheodore Ts'o printk(KERN_CRIT 777efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7780ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 779ac27a0ecSDave Kleikamp va_end(args); 780efbed4dcSTheodore Ts'o } 7819a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7829a089b21SGabriel Krisman Bertazi 783e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 784ac27a0ecSDave Kleikamp } 785ac27a0ecSDave Kleikamp 786e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78754d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 788273df556SFrank Mayhar const char *fmt, ...) 789273df556SFrank Mayhar { 790273df556SFrank Mayhar va_list args; 791f7c21177STheodore Ts'o struct va_format vaf; 792273df556SFrank Mayhar 7930db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7940db1ff22STheodore Ts'o return; 7950db1ff22STheodore Ts'o 796ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 797efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 798273df556SFrank Mayhar va_start(args, fmt); 799f7c21177STheodore Ts'o vaf.fmt = fmt; 800f7c21177STheodore Ts'o vaf.va = &args; 801c398eda0STheodore Ts'o if (block) 802d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 803d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 804d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 805d9ee81daSJoe Perches block, current->comm, &vaf); 806d9ee81daSJoe Perches else 807d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 808d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 809d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 810d9ee81daSJoe Perches current->comm, &vaf); 811273df556SFrank Mayhar va_end(args); 812efbed4dcSTheodore Ts'o } 8139a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8149a089b21SGabriel Krisman Bertazi 815e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 81654d3adbcSTheodore Ts'o function, line); 817273df556SFrank Mayhar } 818273df556SFrank Mayhar 819e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 820f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 821f7c21177STheodore Ts'o const char *fmt, ...) 822273df556SFrank Mayhar { 823273df556SFrank Mayhar va_list args; 824f7c21177STheodore Ts'o struct va_format vaf; 825496ad9aaSAl Viro struct inode *inode = file_inode(file); 826273df556SFrank Mayhar char pathname[80], *path; 827273df556SFrank Mayhar 8280db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8290db1ff22STheodore Ts'o return; 8300db1ff22STheodore Ts'o 831ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 832efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8339bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 834f9a62d09SDan Carpenter if (IS_ERR(path)) 835273df556SFrank Mayhar path = "(unknown)"; 836f7c21177STheodore Ts'o va_start(args, fmt); 837f7c21177STheodore Ts'o vaf.fmt = fmt; 838f7c21177STheodore Ts'o vaf.va = &args; 839d9ee81daSJoe Perches if (block) 840d9ee81daSJoe Perches printk(KERN_CRIT 841d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 842d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 843d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 844d9ee81daSJoe Perches block, current->comm, path, &vaf); 845d9ee81daSJoe Perches else 846d9ee81daSJoe Perches printk(KERN_CRIT 847d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 848d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 849d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 850d9ee81daSJoe Perches current->comm, path, &vaf); 851273df556SFrank Mayhar va_end(args); 852efbed4dcSTheodore Ts'o } 8539a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8549a089b21SGabriel Krisman Bertazi 855e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 85654d3adbcSTheodore Ts'o function, line); 857273df556SFrank Mayhar } 858273df556SFrank Mayhar 859722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 860ac27a0ecSDave Kleikamp char nbuf[16]) 861ac27a0ecSDave Kleikamp { 862ac27a0ecSDave Kleikamp char *errstr = NULL; 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp switch (errno) { 8656a797d27SDarrick J. Wong case -EFSCORRUPTED: 8666a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8676a797d27SDarrick J. Wong break; 8686a797d27SDarrick J. Wong case -EFSBADCRC: 8696a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8706a797d27SDarrick J. Wong break; 871ac27a0ecSDave Kleikamp case -EIO: 872ac27a0ecSDave Kleikamp errstr = "IO failure"; 873ac27a0ecSDave Kleikamp break; 874ac27a0ecSDave Kleikamp case -ENOMEM: 875ac27a0ecSDave Kleikamp errstr = "Out of memory"; 876ac27a0ecSDave Kleikamp break; 877ac27a0ecSDave Kleikamp case -EROFS: 87878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 87978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 880ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 881ac27a0ecSDave Kleikamp else 882ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 883ac27a0ecSDave Kleikamp break; 884ac27a0ecSDave Kleikamp default: 885ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 886ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 887ac27a0ecSDave Kleikamp * NULL. */ 888ac27a0ecSDave Kleikamp if (nbuf) { 889ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 890ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 891ac27a0ecSDave Kleikamp errstr = nbuf; 892ac27a0ecSDave Kleikamp } 893ac27a0ecSDave Kleikamp break; 894ac27a0ecSDave Kleikamp } 895ac27a0ecSDave Kleikamp 896ac27a0ecSDave Kleikamp return errstr; 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 899617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 900ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 901ac27a0ecSDave Kleikamp 902c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 903c398eda0STheodore Ts'o unsigned int line, int errno) 904ac27a0ecSDave Kleikamp { 905ac27a0ecSDave Kleikamp char nbuf[16]; 906ac27a0ecSDave Kleikamp const char *errstr; 907ac27a0ecSDave Kleikamp 9080db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9090db1ff22STheodore Ts'o return; 9100db1ff22STheodore Ts'o 911ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 912ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 913ac27a0ecSDave Kleikamp * an error. */ 914bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 915ac27a0ecSDave Kleikamp return; 916ac27a0ecSDave Kleikamp 917efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 918617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 919c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 920c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 921efbed4dcSTheodore Ts'o } 9229a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 923ac27a0ecSDave Kleikamp 924e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 925ac27a0ecSDave Kleikamp } 926ac27a0ecSDave Kleikamp 927e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 928e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 929b31e1552SEric Sandeen { 9300ff2ea7dSJoe Perches struct va_format vaf; 931b31e1552SEric Sandeen va_list args; 932b31e1552SEric Sandeen 933da812f61SLukas Czerner if (sb) { 9341cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 935da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 936da812f61SLukas Czerner "EXT4-fs")) 937efbed4dcSTheodore Ts'o return; 938da812f61SLukas Czerner } 939efbed4dcSTheodore Ts'o 940b31e1552SEric Sandeen va_start(args, fmt); 9410ff2ea7dSJoe Perches vaf.fmt = fmt; 9420ff2ea7dSJoe Perches vaf.va = &args; 943da812f61SLukas Czerner if (sb) 9440ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 945da812f61SLukas Czerner else 946da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 947b31e1552SEric Sandeen va_end(args); 948b31e1552SEric Sandeen } 949b31e1552SEric Sandeen 9501cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9511cf006edSDmitry Monakhov { 9521cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9531cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9541cf006edSDmitry Monakhov "EXT4-fs warning"); 9551cf006edSDmitry Monakhov } 956b03a2f7eSAndreas Dilger 95712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 958c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 959ac27a0ecSDave Kleikamp { 9600ff2ea7dSJoe Perches struct va_format vaf; 961ac27a0ecSDave Kleikamp va_list args; 962ac27a0ecSDave Kleikamp 963b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 964efbed4dcSTheodore Ts'o return; 965efbed4dcSTheodore Ts'o 966ac27a0ecSDave Kleikamp va_start(args, fmt); 9670ff2ea7dSJoe Perches vaf.fmt = fmt; 9680ff2ea7dSJoe Perches vaf.va = &args; 9690ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9700ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 971ac27a0ecSDave Kleikamp va_end(args); 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 974b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 975b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 976b03a2f7eSAndreas Dilger { 977b03a2f7eSAndreas Dilger struct va_format vaf; 978b03a2f7eSAndreas Dilger va_list args; 979b03a2f7eSAndreas Dilger 980b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 981b03a2f7eSAndreas Dilger return; 982b03a2f7eSAndreas Dilger 983b03a2f7eSAndreas Dilger va_start(args, fmt); 984b03a2f7eSAndreas Dilger vaf.fmt = fmt; 985b03a2f7eSAndreas Dilger vaf.va = &args; 986b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 987b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 988b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 989b03a2f7eSAndreas Dilger va_end(args); 990b03a2f7eSAndreas Dilger } 991b03a2f7eSAndreas Dilger 992e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 993e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 994e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 995e29136f8STheodore Ts'o const char *fmt, ...) 9965d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9975d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9985d1b1b3fSAneesh Kumar K.V { 9990ff2ea7dSJoe Perches struct va_format vaf; 10005d1b1b3fSAneesh Kumar K.V va_list args; 10015d1b1b3fSAneesh Kumar K.V 10020db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 10030db1ff22STheodore Ts'o return; 10040db1ff22STheodore Ts'o 1005ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1006efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10075d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10080ff2ea7dSJoe Perches vaf.fmt = fmt; 10090ff2ea7dSJoe Perches vaf.va = &args; 101021149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1011e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1012e29136f8STheodore Ts'o if (ino) 10130ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1014e29136f8STheodore Ts'o if (block) 1015efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1016efbed4dcSTheodore Ts'o (unsigned long long) block); 10170ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10185d1b1b3fSAneesh Kumar K.V va_end(args); 1019efbed4dcSTheodore Ts'o } 10205d1b1b3fSAneesh Kumar K.V 1021c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1022327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1023327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1024e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10252d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10262d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10272d01ddc8SJan Kara line); 1028c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10292d01ddc8SJan Kara } 10305d1b1b3fSAneesh Kumar K.V return; 10315d1b1b3fSAneesh Kumar K.V } 10325d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1033e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10345d1b1b3fSAneesh Kumar K.V /* 10355d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10365d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10375d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10385d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10395d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 104025985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10415d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10425d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10435d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10445d1b1b3fSAneesh Kumar K.V */ 10455d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10465d1b1b3fSAneesh Kumar K.V return; 10475d1b1b3fSAneesh Kumar K.V } 10485d1b1b3fSAneesh Kumar K.V 1049db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1050db79e6d1SWang Shilong ext4_group_t group, 1051db79e6d1SWang Shilong unsigned int flags) 1052db79e6d1SWang Shilong { 1053db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1054db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1055db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10569af0b3d1SWang Shilong int ret; 1057db79e6d1SWang Shilong 10589af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10599af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10609af0b3d1SWang Shilong &grp->bb_state); 10619af0b3d1SWang Shilong if (!ret) 1062db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1063db79e6d1SWang Shilong grp->bb_free); 1064db79e6d1SWang Shilong } 1065db79e6d1SWang Shilong 10669af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10679af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10689af0b3d1SWang Shilong &grp->bb_state); 10699af0b3d1SWang Shilong if (!ret && gdp) { 1070db79e6d1SWang Shilong int count; 1071db79e6d1SWang Shilong 1072db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1073db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1074db79e6d1SWang Shilong count); 1075db79e6d1SWang Shilong } 1076db79e6d1SWang Shilong } 1077db79e6d1SWang Shilong } 1078db79e6d1SWang Shilong 1079617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1080ac27a0ecSDave Kleikamp { 1081617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1082ac27a0ecSDave Kleikamp 1083617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1084ac27a0ecSDave Kleikamp return; 1085ac27a0ecSDave Kleikamp 108612062dddSEric Sandeen ext4_warning(sb, 1087ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1088ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1089617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1090ac27a0ecSDave Kleikamp 1091617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1092617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1093617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1094ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1095ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1096ac27a0ecSDave Kleikamp 1097ac27a0ecSDave Kleikamp /* 1098ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1099ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1100ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1101ac27a0ecSDave Kleikamp */ 1102ac27a0ecSDave Kleikamp } 1103ac27a0ecSDave Kleikamp 1104ac27a0ecSDave Kleikamp /* 1105ac27a0ecSDave Kleikamp * Open the external journal device 1106ac27a0ecSDave Kleikamp */ 1107b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1108ac27a0ecSDave Kleikamp { 1109ac27a0ecSDave Kleikamp struct block_device *bdev; 1110ac27a0ecSDave Kleikamp 1111d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1112ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1113ac27a0ecSDave Kleikamp goto fail; 1114ac27a0ecSDave Kleikamp return bdev; 1115ac27a0ecSDave Kleikamp 1116ac27a0ecSDave Kleikamp fail: 1117ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1118ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1119ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1120ac27a0ecSDave Kleikamp return NULL; 1121ac27a0ecSDave Kleikamp } 1122ac27a0ecSDave Kleikamp 1123ac27a0ecSDave Kleikamp /* 1124ac27a0ecSDave Kleikamp * Release the journal device 1125ac27a0ecSDave Kleikamp */ 11264385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1127ac27a0ecSDave Kleikamp { 11284385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1129ac27a0ecSDave Kleikamp } 1130ac27a0ecSDave Kleikamp 11314385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1132ac27a0ecSDave Kleikamp { 1133ac27a0ecSDave Kleikamp struct block_device *bdev; 1134ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1135ac27a0ecSDave Kleikamp if (bdev) { 11364385bab1SAl Viro ext4_blkdev_put(bdev); 1137ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1138ac27a0ecSDave Kleikamp } 1139ac27a0ecSDave Kleikamp } 1140ac27a0ecSDave Kleikamp 1141ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1142ac27a0ecSDave Kleikamp { 1143617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1144ac27a0ecSDave Kleikamp } 1145ac27a0ecSDave Kleikamp 1146617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1147ac27a0ecSDave Kleikamp { 1148ac27a0ecSDave Kleikamp struct list_head *l; 1149ac27a0ecSDave Kleikamp 1150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1151ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1152ac27a0ecSDave Kleikamp 1153ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1154ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1155ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1156ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1157ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1158ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1159ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1160ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1161ac27a0ecSDave Kleikamp } 1162ac27a0ecSDave Kleikamp } 1163ac27a0ecSDave Kleikamp 1164957153fcSJan Kara #ifdef CONFIG_QUOTA 1165957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1166957153fcSJan Kara 1167957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1168957153fcSJan Kara { 1169957153fcSJan Kara int type; 1170957153fcSJan Kara 1171957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1172957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1173957153fcSJan Kara ext4_quota_off(sb, type); 1174957153fcSJan Kara } 117533458eabSTheodore Ts'o 117633458eabSTheodore Ts'o /* 117733458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117833458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117933458eabSTheodore Ts'o */ 118033458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 118133458eabSTheodore Ts'o struct ext4_sb_info *sbi, 118233458eabSTheodore Ts'o int type) 118333458eabSTheodore Ts'o { 118433458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 118533458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118633458eabSTheodore Ts'o } 1187957153fcSJan Kara #else 1188957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1189957153fcSJan Kara { 1190957153fcSJan Kara } 1191957153fcSJan Kara #endif 1192957153fcSJan Kara 1193617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1194ac27a0ecSDave Kleikamp { 1195617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1196617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11971d0c3924STheodore Ts'o struct buffer_head **group_desc; 11987c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 119997abd7d4STheodore Ts'o int aborted = 0; 1200ef2cabf7SHidehiro Kawai int i, err; 1201ac27a0ecSDave Kleikamp 1202b98535d0SYe Bin /* 1203b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1204b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1205b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1206b98535d0SYe Bin * Unregister sysfs before flush sbi->s_error_work. 1207b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1208b98535d0SYe Bin * read metadata verify failed then will queue error work. 1209b98535d0SYe Bin * flush_stashed_error_work will call start_this_handle may trigger 1210b98535d0SYe Bin * BUG_ON. 1211b98535d0SYe Bin */ 1212b98535d0SYe Bin ext4_unregister_sysfs(sb); 1213b98535d0SYe Bin 1214857ac889SLukas Czerner ext4_unregister_li_request(sb); 1215957153fcSJan Kara ext4_quota_off_umount(sb); 1216e0ccfd95SChristoph Hellwig 1217c92dc856SJan Kara flush_work(&sbi->s_error_work); 12182e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 121902f310fcSJan Kara ext4_release_orphan_info(sb); 12204c0425ffSMingming Cao 12210390131bSFrank Mayhar if (sbi->s_journal) { 122297abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1223ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 122447b4a50bSJan Kara sbi->s_journal = NULL; 1225878520acSTheodore Ts'o if ((err < 0) && !aborted) { 122654d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12270390131bSFrank Mayhar } 1228878520acSTheodore Ts'o } 1229d4edac31SJosef Bacik 1230d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12319105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1232d4edac31SJosef Bacik ext4_release_system_zone(sb); 1233d4edac31SJosef Bacik ext4_mb_release(sb); 1234d4edac31SJosef Bacik ext4_ext_release(sb); 1235d4edac31SJosef Bacik 1236bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1237e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 123802f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1239ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1240ac27a0ecSDave Kleikamp } 1241bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12424392fbc4SJan Kara ext4_commit_super(sb); 1243a8e25a83SArtem Bityutskiy 12441d0c3924STheodore Ts'o rcu_read_lock(); 12451d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1246ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12471d0c3924STheodore Ts'o brelse(group_desc[i]); 12481d0c3924STheodore Ts'o kvfree(group_desc); 12497c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12507c990728SSuraj Jitindar Singh if (flex_groups) { 12517c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12527c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12537c990728SSuraj Jitindar Singh kvfree(flex_groups); 12547c990728SSuraj Jitindar Singh } 12551d0c3924STheodore Ts'o rcu_read_unlock(); 125657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1257ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1258ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 125957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1260efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1261bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1262ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1263a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 126433458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1265ac27a0ecSDave Kleikamp #endif 1266ac27a0ecSDave Kleikamp 1267ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1268ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1269ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1270ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1271ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1272ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1273837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1274ac27a0ecSDave Kleikamp 127589d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1276f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1277ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1278ac27a0ecSDave Kleikamp /* 1279ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1280ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1281ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1282ac27a0ecSDave Kleikamp */ 1283ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1284ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1285617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1286ac27a0ecSDave Kleikamp } 128750c15df6SChengguang Xu 1288dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1289dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 129050c15df6SChengguang Xu 129147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 129247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 129350c15df6SChengguang Xu 1294618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1295618f0031SPavel Skripkin 12969060dd2cSEric Sandeen brelse(sbi->s_sbh); 1297ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12983197ebdbSTheodore Ts'o /* 12993197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13003197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13013197ebdbSTheodore Ts'o */ 13023197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13033197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13040441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13050441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1306705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13075e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1308ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13095298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1310f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1311c83ad55eSGabriel Krisman Bertazi #endif 1312ac27a0ecSDave Kleikamp kfree(sbi); 1313ac27a0ecSDave Kleikamp } 1314ac27a0ecSDave Kleikamp 1315e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1316ac27a0ecSDave Kleikamp 1317ac27a0ecSDave Kleikamp /* 1318ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1319ac27a0ecSDave Kleikamp */ 1320617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1321ac27a0ecSDave Kleikamp { 1322617ba13bSMingming Cao struct ext4_inode_info *ei; 1323ac27a0ecSDave Kleikamp 1324e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1325ac27a0ecSDave Kleikamp if (!ei) 1326ac27a0ecSDave Kleikamp return NULL; 13270b8e58a1SAndreas Dilger 1328ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1329202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1330c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 133127bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1332c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13339a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13349a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1335edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1336eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1337edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1338dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1339d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1340d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13411dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1342a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1343a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 134496c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1345a9e7f447SDmitry Monakhov #endif 13468aefcd55STheodore Ts'o ei->jinode = NULL; 13472e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1348744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1349b436b9beSJan Kara ei->i_sync_tid = 0; 1350b436b9beSJan Kara ei->i_datasync_tid = 0; 1351e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13522e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1353aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1354aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1355ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1356ac27a0ecSDave Kleikamp } 1357ac27a0ecSDave Kleikamp 13587ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13597ff9c073STheodore Ts'o { 13607ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13617ff9c073STheodore Ts'o 136229b3692eSEric Biggers if (!drop) 136329b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 136429b3692eSEric Biggers 13657ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13667ff9c073STheodore Ts'o return drop; 13677ff9c073STheodore Ts'o } 13687ff9c073STheodore Ts'o 136994053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1370fa0d7e3dSNick Piggin { 13712c58d548SEric Biggers fscrypt_free_inode(inode); 1372aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1373aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1374aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1375aa75f4d3SHarshad Shirwadkar } 1376fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1377fa0d7e3dSNick Piggin } 1378fa0d7e3dSNick Piggin 1379617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1380ac27a0ecSDave Kleikamp { 13819f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1382b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1383b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1384b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13859f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13869f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13879f7dd93dSVasily Averin true); 13889f7dd93dSVasily Averin dump_stack(); 13899f7dd93dSVasily Averin } 13906fed8395SJeffle Xu 13916fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13926fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13936fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13946fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13956fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1396ac27a0ecSDave Kleikamp } 1397ac27a0ecSDave Kleikamp 139851cc5068SAlexey Dobriyan static void init_once(void *foo) 1399ac27a0ecSDave Kleikamp { 1400617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1401ac27a0ecSDave Kleikamp 1402ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1403ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14040e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1405ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1406aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1407ac27a0ecSDave Kleikamp } 1408ac27a0ecSDave Kleikamp 1409e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1410ac27a0ecSDave Kleikamp { 1411f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1412f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1413f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1414f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1415f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1416f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 141720c2df83SPaul Mundt init_once); 1418617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1419ac27a0ecSDave Kleikamp return -ENOMEM; 1420ac27a0ecSDave Kleikamp return 0; 1421ac27a0ecSDave Kleikamp } 1422ac27a0ecSDave Kleikamp 1423ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1424ac27a0ecSDave Kleikamp { 14258c0a8537SKirill A. Shutemov /* 14268c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14278c0a8537SKirill A. Shutemov * destroy cache. 14288c0a8537SKirill A. Shutemov */ 14298c0a8537SKirill A. Shutemov rcu_barrier(); 1430617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1431ac27a0ecSDave Kleikamp } 1432ac27a0ecSDave Kleikamp 14330930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1434ac27a0ecSDave Kleikamp { 1435aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14360930fcc1SAl Viro invalidate_inode_buffers(inode); 1437dbd5768fSJan Kara clear_inode(inode); 143827bc446eSbrookxu ext4_discard_preallocations(inode, 0); 143951865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1440f4c2d372SJan Kara dquot_drop(inode); 14418aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14428aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14438aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14448aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14458aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14468aefcd55STheodore Ts'o } 14473d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1448c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1449ac27a0ecSDave Kleikamp } 1450ac27a0ecSDave Kleikamp 14511b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14521b961ac0SChristoph Hellwig u64 ino, u32 generation) 1453ac27a0ecSDave Kleikamp { 1454ac27a0ecSDave Kleikamp struct inode *inode; 1455ac27a0ecSDave Kleikamp 14568a363970STheodore Ts'o /* 1457ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1458ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1459ac27a0ecSDave Kleikamp */ 14608a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14611d1fe1eeSDavid Howells if (IS_ERR(inode)) 14621d1fe1eeSDavid Howells return ERR_CAST(inode); 14631d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1464ac27a0ecSDave Kleikamp iput(inode); 1465ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1466ac27a0ecSDave Kleikamp } 14671b961ac0SChristoph Hellwig 14681b961ac0SChristoph Hellwig return inode; 1469ac27a0ecSDave Kleikamp } 14701b961ac0SChristoph Hellwig 14711b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14721b961ac0SChristoph Hellwig int fh_len, int fh_type) 14731b961ac0SChristoph Hellwig { 14741b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14751b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14761b961ac0SChristoph Hellwig } 14771b961ac0SChristoph Hellwig 14781b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14791b961ac0SChristoph Hellwig int fh_len, int fh_type) 14801b961ac0SChristoph Hellwig { 14811b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14821b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1483ac27a0ecSDave Kleikamp } 1484ac27a0ecSDave Kleikamp 1485fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1486fde87268STheodore Ts'o { 1487fde87268STheodore Ts'o struct writeback_control wbc = { 1488fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1489fde87268STheodore Ts'o }; 1490fde87268STheodore Ts'o 1491fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1492fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1493fde87268STheodore Ts'o } 1494fde87268STheodore Ts'o 1495643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1496a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1497a7550b30SJaegeuk Kim { 1498a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1499a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1500a7550b30SJaegeuk Kim } 1501a7550b30SJaegeuk Kim 1502a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1503a7550b30SJaegeuk Kim void *fs_data) 1504a7550b30SJaegeuk Kim { 15052f8f5e76SEric Biggers handle_t *handle = fs_data; 1506c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1507a7550b30SJaegeuk Kim 15089ce0151aSEric Biggers /* 15099ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 15109ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 15119ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 15129ce0151aSEric Biggers * the filename "lost+found" itself. 15139ce0151aSEric Biggers */ 15149ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 15159ce0151aSEric Biggers return -EPERM; 1516a7550b30SJaegeuk Kim 15177d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 15187d3e06a8SRoss Zwisler return -EINVAL; 15197d3e06a8SRoss Zwisler 1520b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1521b383a73fSIra Weiny return -EOPNOTSUPP; 1522b383a73fSIra Weiny 152394840e3cSEric Biggers res = ext4_convert_inline_data(inode); 152494840e3cSEric Biggers if (res) 152594840e3cSEric Biggers return res; 152694840e3cSEric Biggers 15272f8f5e76SEric Biggers /* 15282f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15292f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15302f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15312f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15322f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15332f8f5e76SEric Biggers */ 15342f8f5e76SEric Biggers 15352f8f5e76SEric Biggers if (handle) { 15362f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15372f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15382f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15392f8f5e76SEric Biggers ctx, len, 0); 1540a7550b30SJaegeuk Kim if (!res) { 1541a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1542a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1543a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1544a3caa24bSJan Kara /* 15452ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15462ee6a576SEric Biggers * S_DAX may be disabled 1547a3caa24bSJan Kara */ 1548043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1549a7550b30SJaegeuk Kim } 1550a7550b30SJaegeuk Kim return res; 1551a7550b30SJaegeuk Kim } 1552a7550b30SJaegeuk Kim 1553b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1554b8cb5a54STahsin Erdogan if (res) 1555b8cb5a54STahsin Erdogan return res; 15562f8f5e76SEric Biggers retry: 1557af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1558af65207cSTahsin Erdogan &credits); 1559dec214d0STahsin Erdogan if (res) 1560dec214d0STahsin Erdogan return res; 1561dec214d0STahsin Erdogan 1562c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1563a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1564a7550b30SJaegeuk Kim return PTR_ERR(handle); 1565a7550b30SJaegeuk Kim 15662f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15672f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15682f8f5e76SEric Biggers ctx, len, 0); 1569a7550b30SJaegeuk Kim if (!res) { 1570a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15712ee6a576SEric Biggers /* 15722ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15732ee6a576SEric Biggers * S_DAX may be disabled 15742ee6a576SEric Biggers */ 1575043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1576a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1577a7550b30SJaegeuk Kim if (res) 1578a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1579a7550b30SJaegeuk Kim } 1580a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15812f8f5e76SEric Biggers 15822f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15832f8f5e76SEric Biggers goto retry; 1584a7550b30SJaegeuk Kim if (!res) 1585a7550b30SJaegeuk Kim res = res2; 1586a7550b30SJaegeuk Kim return res; 1587a7550b30SJaegeuk Kim } 1588a7550b30SJaegeuk Kim 1589ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1590a7550b30SJaegeuk Kim { 1591ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1592a7550b30SJaegeuk Kim } 1593a7550b30SJaegeuk Kim 1594b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1595b925acb8SEric Biggers { 1596b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1597b925acb8SEric Biggers } 1598b925acb8SEric Biggers 1599b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1600b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1601b925acb8SEric Biggers { 1602b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1603b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1604b925acb8SEric Biggers } 1605b925acb8SEric Biggers 16066f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1607a5d431efSEric Biggers .key_prefix = "ext4:", 1608a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1609a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1610ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1611a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1612b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1613b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1614a7550b30SJaegeuk Kim }; 1615a7550b30SJaegeuk Kim #endif 1616a7550b30SJaegeuk Kim 1617ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1618d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1619689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1620ac27a0ecSDave Kleikamp 1621617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1622617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1623617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1624617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1625617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16266f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16278c54ca9cSAl Viro const struct path *path); 1628617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1629ac27a0ecSDave Kleikamp size_t len, loff_t off); 1630617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1631ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16327c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16337c319d32SAditya Kali unsigned int flags); 1634ac27a0ecSDave Kleikamp 163596c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 163696c7e0d9SJan Kara { 163796c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 163896c7e0d9SJan Kara } 163996c7e0d9SJan Kara 164061e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 164160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1642617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1643617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1644617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1645617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1646a5b5ee32SJan Kara .write_info = ext4_write_info, 1647a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1648a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1649040cb378SLi Xi .get_projid = ext4_get_projid, 16507a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1651ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1652ac27a0ecSDave Kleikamp }; 1653ac27a0ecSDave Kleikamp 16540d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1655617ba13bSMingming Cao .quota_on = ext4_quota_on, 1656ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1657287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16580a240339SJan Kara .get_state = dquot_get_state, 1659287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1660287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16616332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16626332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1663ac27a0ecSDave Kleikamp }; 1664ac27a0ecSDave Kleikamp #endif 1665ac27a0ecSDave Kleikamp 1666ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1667617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 166894053139SAl Viro .free_inode = ext4_free_in_core_inode, 1669617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1670617ba13bSMingming Cao .write_inode = ext4_write_inode, 1671617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16727ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16730930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1674617ba13bSMingming Cao .put_super = ext4_put_super, 1675617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1676c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1677c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1678617ba13bSMingming Cao .statfs = ext4_statfs, 1679617ba13bSMingming Cao .show_options = ext4_show_options, 1680ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1681617ba13bSMingming Cao .quota_read = ext4_quota_read, 1682617ba13bSMingming Cao .quota_write = ext4_quota_write, 168396c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1684ac27a0ecSDave Kleikamp #endif 1685ac27a0ecSDave Kleikamp }; 1686ac27a0ecSDave Kleikamp 168739655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16881b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16891b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1690617ba13bSMingming Cao .get_parent = ext4_get_parent, 1691fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1692ac27a0ecSDave Kleikamp }; 1693ac27a0ecSDave Kleikamp 1694ac27a0ecSDave Kleikamp enum { 1695ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1696ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 169772578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1698ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 169972578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1700ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1701ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1702ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 17036ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 17044f74d15fSEric Biggers Opt_inlinecrypt, 1705ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1706ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 17079cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 17089cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1709327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 17104437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 17111449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 17125328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1713744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1714fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1715cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 171621175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1717e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17188016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 171999c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17208016e29fSHarshad Shirwadkar #endif 1721ac27a0ecSDave Kleikamp }; 1722ac27a0ecSDave Kleikamp 1723e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1724ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1725ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1726ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1727e5a185c2SLukas Czerner {} 1728e5a185c2SLukas Czerner }; 1729e5a185c2SLukas Czerner 1730e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1731ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1732ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1733ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1734e5a185c2SLukas Czerner {} 1735e5a185c2SLukas Czerner }; 1736e5a185c2SLukas Czerner 1737e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1738e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1739e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1740e5a185c2SLukas Czerner {} 1741e5a185c2SLukas Czerner }; 1742e5a185c2SLukas Czerner 1743e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1744ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1745ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1746ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1747e5a185c2SLukas Czerner {} 1748e5a185c2SLukas Czerner }; 1749e5a185c2SLukas Czerner 1750e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1751e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1752e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1753e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1754e5a185c2SLukas Czerner {} 1755e5a185c2SLukas Czerner }; 1756e5a185c2SLukas Czerner 1757e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1758e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1759e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1760e5a185c2SLukas Czerner 1761e5a185c2SLukas Czerner /* 1762e5a185c2SLukas Czerner * Mount option specification 1763e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1764e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1765e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1766e5a185c2SLukas Czerner * separate for now. 1767e5a185c2SLukas Czerner */ 1768e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1769e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1770e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1771e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1772e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1773e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1774e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1775e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1776e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1777e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1778e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1779e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1780e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1781e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1782e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1783e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1784e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1785e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1786e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1787e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1788e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1789e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1790e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1791e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1792e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1793e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1794e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1795e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1796e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1797e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1798e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1799e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1800e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1801e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1802e5a185c2SLukas Czerner ext4_param_data_err), 1803e5a185c2SLukas Czerner fsparam_string_empty 1804e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1805e5a185c2SLukas Czerner fsparam_string_empty 1806e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1807e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1808e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1809e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1810e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1811e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1812e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1813e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1814e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1815e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1816e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1817e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1818e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1819e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1820e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1821e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1822e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1823e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1824e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1825e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1826e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1827e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1828e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1829e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1830e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1831e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1832e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1833e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1834e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1835e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1836e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1837e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1838e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1839e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1840e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1841e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1842e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1843e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1844e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1845e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1846e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1847e5a185c2SLukas Czerner #endif 1848e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1849e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1850e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1851e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1852e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1853e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1854e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1855e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1856e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1857e5a185c2SLukas Czerner Opt_removed), 1858e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1859e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1860e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1861e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1862e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1863e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1864e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1865e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1866e5a185c2SLukas Czerner {} 1867e5a185c2SLukas Czerner }; 1868e5a185c2SLukas Czerner 1869b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1870196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1871196e402aSHarshad Shirwadkar 1872d6006186SEric Biggers static const char deprecated_msg[] = 1873d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1874437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1875b3881f74STheodore Ts'o 187626092bf5STheodore Ts'o #define MOPT_SET 0x0001 187726092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 187826092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 187926092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 188026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 188126092bf5STheodore Ts'o #define MOPT_Q 0 1882ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 188326092bf5STheodore Ts'o #else 188426092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 188526092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 188626092bf5STheodore Ts'o #endif 1887ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1888ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18898dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1890ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1891ba2e524dSLukas Czerner #define MOPT_2 0x0100 189226092bf5STheodore Ts'o 189326092bf5STheodore Ts'o static const struct mount_opts { 189426092bf5STheodore Ts'o int token; 189526092bf5STheodore Ts'o int mount_opt; 189626092bf5STheodore Ts'o int flags; 189726092bf5STheodore Ts'o } ext4_mount_opts[] = { 189826092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 189926092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 190026092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 190126092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 190226092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 190326092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 19048dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 19058dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 19068dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 19078dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 190826092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 190926092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 19108dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 19118dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19128dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 191359d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1914327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1915327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1916c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1917c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 19188dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 19191e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 192026092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 19218dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 19221e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19238dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1924ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 192526092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 192626092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 192726092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 192826092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 192926092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1930ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1931ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1932ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1933ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1934ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 193526092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 193626092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 193726092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 193826092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 193926092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 194026092bf5STheodore Ts'o #else 194126092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 194226092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 194326092bf5STheodore Ts'o #endif 194426092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 194526092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 194626092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 194726092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 194826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 194926092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 195026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 195149da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 195249da9392SJan Kara MOPT_SET | MOPT_Q}, 195326092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 195449da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 195549da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1956ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1957ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1958ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1959cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 196021175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 19613d392b26STheodore Ts'o MOPT_SET}, 196299c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 19630f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 19640f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 19658016e29fSHarshad Shirwadkar #endif 196626092bf5STheodore Ts'o {Opt_err, 0, 0} 196726092bf5STheodore Ts'o }; 196826092bf5STheodore Ts'o 19695298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1970c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1971c83ad55eSGabriel Krisman Bertazi __u16 magic; 1972c83ad55eSGabriel Krisman Bertazi char *name; 197349bd03ccSChristoph Hellwig unsigned int version; 1974c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 197549bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1976c83ad55eSGabriel Krisman Bertazi }; 1977c83ad55eSGabriel Krisman Bertazi 1978aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1979aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1980c83ad55eSGabriel Krisman Bertazi { 1981c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1982c83ad55eSGabriel Krisman Bertazi int i; 1983c83ad55eSGabriel Krisman Bertazi 1984c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1985c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1986aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1987c83ad55eSGabriel Krisman Bertazi 1988aa8bf298SChristoph Hellwig return NULL; 1989c83ad55eSGabriel Krisman Bertazi } 1990c83ad55eSGabriel Krisman Bertazi #endif 1991c83ad55eSGabriel Krisman Bertazi 19926e47a3ccSLukas Czerner static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg) 1993ed318a6cSEric Biggers { 1994ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 1995ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 1996ed318a6cSEric Biggers int err; 1997ed318a6cSEric Biggers 19986e47a3ccSLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, arg, 1999ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2000ed318a6cSEric Biggers if (err) { 2001ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 20026e47a3ccSLukas Czerner "Error while setting test dummy encryption [%d]", err); 20036e47a3ccSLukas Czerner return err; 2004ed318a6cSEric Biggers } 2005ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2006ed318a6cSEric Biggers #endif 20076e47a3ccSLukas Czerner return 0; 2008ed318a6cSEric Biggers } 2009ed318a6cSEric Biggers 20106e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 20116e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 20126e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 20136e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 20146e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 20156e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 20166e47a3ccSLukas Czerner #define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6) 20176e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 20186e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 20196e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 20206e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 20216e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 20226e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 20236e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 20246e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 20256e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 20266e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 20276e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 20287edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 202927b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 20306e47a3ccSLukas Czerner 2031461c3af0SLukas Czerner struct ext4_fs_context { 2032e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 20336e47a3ccSLukas Czerner char *test_dummy_enc_arg; 2034e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 20356e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 20366e47a3ccSLukas Czerner int s_fc_debug_max_replay; 20376e47a3ccSLukas Czerner #endif 20386e47a3ccSLukas Czerner unsigned short qname_spec; 20396e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 20406e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 20416e47a3ccSLukas Czerner unsigned long journal_devnum; 20426e47a3ccSLukas Czerner unsigned long s_commit_interval; 20436e47a3ccSLukas Czerner unsigned long s_stripe; 20446e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 20456e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 20466e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 20476e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 20486e47a3ccSLukas Czerner unsigned int journal_ioprio; 20496e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 20506e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 20516e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 20526e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 2053e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 2054e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 2055b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 20566e47a3ccSLukas Czerner unsigned int spec; 20576e47a3ccSLukas Czerner u32 s_max_batch_time; 20586e47a3ccSLukas Czerner u32 s_min_batch_time; 20596e47a3ccSLukas Czerner kuid_t s_resuid; 20606e47a3ccSLukas Czerner kgid_t s_resgid; 20617edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 2062b237e304SHarshad Shirwadkar }; 2063b237e304SHarshad Shirwadkar 2064cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 2065cebe85d5SLukas Czerner { 2066cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2067cebe85d5SLukas Czerner int i; 2068cebe85d5SLukas Czerner 2069cebe85d5SLukas Czerner if (!ctx) 2070cebe85d5SLukas Czerner return; 2071cebe85d5SLukas Czerner 2072cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 2073cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 2074cebe85d5SLukas Czerner 2075cebe85d5SLukas Czerner kfree(ctx->test_dummy_enc_arg); 2076cebe85d5SLukas Czerner kfree(ctx); 2077cebe85d5SLukas Czerner } 2078cebe85d5SLukas Czerner 2079cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 2080cebe85d5SLukas Czerner { 2081da9e4802SDan Carpenter struct ext4_fs_context *ctx; 2082cebe85d5SLukas Czerner 2083cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 2084cebe85d5SLukas Czerner if (!ctx) 2085cebe85d5SLukas Czerner return -ENOMEM; 2086cebe85d5SLukas Czerner 2087cebe85d5SLukas Czerner fc->fs_private = ctx; 2088cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 2089cebe85d5SLukas Czerner 2090cebe85d5SLukas Czerner return 0; 2091cebe85d5SLukas Czerner } 2092cebe85d5SLukas Czerner 2093e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2094e6e268cbSLukas Czerner /* 2095e6e268cbSLukas Czerner * Note the name of the specified quota file. 2096e6e268cbSLukas Czerner */ 2097e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2098e6e268cbSLukas Czerner struct fs_parameter *param) 2099e6e268cbSLukas Czerner { 2100e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2101e6e268cbSLukas Czerner char *qname; 2102e6e268cbSLukas Czerner 2103e6e268cbSLukas Czerner if (param->size < 1) { 2104e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2105e6e268cbSLukas Czerner return -EINVAL; 2106e6e268cbSLukas Czerner } 2107e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2108e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2109e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2110e6e268cbSLukas Czerner return -EINVAL; 2111e6e268cbSLukas Czerner } 2112e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2113e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2114e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2115e6e268cbSLukas Czerner "%s quota file already specified", 2116e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2117e6e268cbSLukas Czerner return -EINVAL; 2118e6e268cbSLukas Czerner } 2119e6e268cbSLukas Czerner return 0; 2120e6e268cbSLukas Czerner } 2121e6e268cbSLukas Czerner 2122e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2123e6e268cbSLukas Czerner if (!qname) { 2124e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2125e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2126e6e268cbSLukas Czerner return -ENOMEM; 2127e6e268cbSLukas Czerner } 2128e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2129e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 21306e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2131e6e268cbSLukas Czerner return 0; 2132e6e268cbSLukas Czerner } 2133e6e268cbSLukas Czerner 2134e6e268cbSLukas Czerner /* 2135e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2136e6e268cbSLukas Czerner */ 2137e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2138e6e268cbSLukas Czerner { 2139e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2140e6e268cbSLukas Czerner 2141e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2142e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2143e6e268cbSLukas Czerner 2144e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2145e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 21466e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2147e6e268cbSLukas Czerner return 0; 2148e6e268cbSLukas Czerner } 2149e6e268cbSLukas Czerner #endif 2150e6e268cbSLukas Czerner 21516e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 21524c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 21534c246728SLukas Czerner unsigned long flag) \ 21546e47a3ccSLukas Czerner { \ 21556e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21566e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2157e3952fccSLukas Czerner } 2158e3952fccSLukas Czerner 2159e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 21604c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 21614c246728SLukas Czerner unsigned long flag) \ 21626e47a3ccSLukas Czerner { \ 21636e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21646e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2165e3952fccSLukas Czerner } 2166e3952fccSLukas Czerner 2167e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 21684c246728SLukas Czerner static inline unsigned long \ 21694c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 21706e47a3ccSLukas Czerner { \ 21714c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2172e3952fccSLukas Czerner } 21736e47a3ccSLukas Czerner 2174e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 21756e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2176e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2177e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 21786e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2179e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2180e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2181e3952fccSLukas Czerner 2182e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2183e3952fccSLukas Czerner { 2184e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2185e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2186e3952fccSLukas Czerner } 21876e47a3ccSLukas Czerner 218802f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 218926092bf5STheodore Ts'o { 2190461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2191461c3af0SLukas Czerner struct fs_parse_result result; 219226092bf5STheodore Ts'o const struct mount_opts *m; 2193461c3af0SLukas Czerner int is_remount; 219408cefc7aSEric W. Biederman kuid_t uid; 219508cefc7aSEric W. Biederman kgid_t gid; 2196461c3af0SLukas Czerner int token; 2197461c3af0SLukas Czerner 2198461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2199461c3af0SLukas Czerner if (token < 0) 2200461c3af0SLukas Czerner return token; 2201461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 220226092bf5STheodore Ts'o 2203ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2204ba2e524dSLukas Czerner if (token == m->token) 2205ba2e524dSLukas Czerner break; 2206ba2e524dSLukas Czerner 2207ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2208ba2e524dSLukas Czerner 2209ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2210ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2211ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2212ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2213ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2214ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2215ba2e524dSLukas Czerner } else 2216ba2e524dSLukas Czerner return -EINVAL; 2217ba2e524dSLukas Czerner } 2218ba2e524dSLukas Czerner 2219ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2220ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2221ba2e524dSLukas Czerner param->key); 2222ba2e524dSLukas Czerner return 0; 2223ba2e524dSLukas Czerner } 2224ba2e524dSLukas Czerner 2225ba2e524dSLukas Czerner switch (token) { 222657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2227ba2e524dSLukas Czerner case Opt_usrjquota: 2228461c3af0SLukas Czerner if (!*param->string) 2229e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2230461c3af0SLukas Czerner else 2231e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2232ba2e524dSLukas Czerner case Opt_grpjquota: 2233461c3af0SLukas Czerner if (!*param->string) 2234e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2235461c3af0SLukas Czerner else 2236e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 223757f73c2cSTheodore Ts'o #endif 2238f7048605STheodore Ts'o case Opt_noacl: 2239f7048605STheodore Ts'o case Opt_nouser_xattr: 2240da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2241f7048605STheodore Ts'o break; 224226092bf5STheodore Ts'o case Opt_sb: 22437edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 22447edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 22457edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 22467edfd85bSLukas Czerner } else { 22477edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 22487edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 22497edfd85bSLukas Czerner } 225002f960f8SLukas Czerner return 0; 225126092bf5STheodore Ts'o case Opt_removed: 2252da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2253461c3af0SLukas Czerner param->key); 225402f960f8SLukas Czerner return 0; 225526092bf5STheodore Ts'o case Opt_abort: 2256e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 225702f960f8SLukas Czerner return 0; 225826092bf5STheodore Ts'o case Opt_i_version: 2259960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "5.20"); 2260960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Use iversion instead\n"); 22616e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 226202f960f8SLukas Czerner return 0; 22634f74d15fSEric Biggers case Opt_inlinecrypt: 22644f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 22656e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 22664f74d15fSEric Biggers #else 2267da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 22684f74d15fSEric Biggers #endif 226902f960f8SLukas Czerner return 0; 2270461c3af0SLukas Czerner case Opt_errors: 22716e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2272ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2273ba2e524dSLukas Czerner return 0; 2274ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2275ba2e524dSLukas Czerner case Opt_jqfmt: 2276ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2277ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2278ba2e524dSLukas Czerner return 0; 2279ba2e524dSLukas Czerner #endif 2280ba2e524dSLukas Czerner case Opt_data: 2281ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2282ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2283ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2284ba2e524dSLukas Czerner return 0; 2285ba2e524dSLukas Czerner case Opt_commit: 2286461c3af0SLukas Czerner if (result.uint_32 == 0) 22876e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2288461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2289da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22909ba55543Szhangyi (F) "Invalid commit interval %d, " 22919ba55543Szhangyi (F) "must be smaller than %d", 2292461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2293da812f61SLukas Czerner return -EINVAL; 22949ba55543Szhangyi (F) } 22956e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22966e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2297ba2e524dSLukas Czerner return 0; 2298ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22996e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2300da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2301461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2302da812f61SLukas Czerner return -EINVAL; 23039803387cSTheodore Ts'o } 23046e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 23056e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2306ba2e524dSLukas Czerner return 0; 2307ba2e524dSLukas Czerner case Opt_max_batch_time: 23086e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 23096e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2310ba2e524dSLukas Czerner return 0; 2311ba2e524dSLukas Czerner case Opt_min_batch_time: 23126e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 23136e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2314ba2e524dSLukas Czerner return 0; 2315ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2316461c3af0SLukas Czerner if (result.uint_32 && 2317461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2318461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2319da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2320e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2321e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2322da812f61SLukas Czerner return -EINVAL; 232326092bf5STheodore Ts'o } 23246e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 23256e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2326ba2e524dSLukas Czerner return 0; 2327ba2e524dSLukas Czerner case Opt_init_itable: 23286e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 23296e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2330461c3af0SLukas Czerner if (param->type == fs_value_is_string) 23316e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 23326e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2333ba2e524dSLukas Czerner return 0; 2334ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 23356e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 23366e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2337ba2e524dSLukas Czerner return 0; 23388016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2339ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 23406e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 23416e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2342ba2e524dSLukas Czerner return 0; 23438016e29fSHarshad Shirwadkar #endif 2344ba2e524dSLukas Czerner case Opt_stripe: 23456e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 23466e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2347ba2e524dSLukas Czerner return 0; 2348ba2e524dSLukas Czerner case Opt_resuid: 2349461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 23500efb3b23SJan Kara if (!uid_valid(uid)) { 2351da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2352461c3af0SLukas Czerner result.uint_32); 2353da812f61SLukas Czerner return -EINVAL; 23540efb3b23SJan Kara } 23556e47a3ccSLukas Czerner ctx->s_resuid = uid; 23566e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2357ba2e524dSLukas Czerner return 0; 2358ba2e524dSLukas Czerner case Opt_resgid: 2359461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 23600efb3b23SJan Kara if (!gid_valid(gid)) { 2361da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2362461c3af0SLukas Czerner result.uint_32); 2363da812f61SLukas Czerner return -EINVAL; 23640efb3b23SJan Kara } 23656e47a3ccSLukas Czerner ctx->s_resgid = gid; 23666e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2367ba2e524dSLukas Czerner return 0; 2368ba2e524dSLukas Czerner case Opt_journal_dev: 23690efb3b23SJan Kara if (is_remount) { 2370da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23710efb3b23SJan Kara "Cannot specify journal on remount"); 2372da812f61SLukas Czerner return -EINVAL; 23730efb3b23SJan Kara } 2374461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 23756e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2376ba2e524dSLukas Czerner return 0; 2377ba2e524dSLukas Czerner case Opt_journal_path: 2378ba2e524dSLukas Czerner { 2379ad4eec61SEric Sandeen struct inode *journal_inode; 2380ad4eec61SEric Sandeen struct path path; 2381ad4eec61SEric Sandeen int error; 2382ad4eec61SEric Sandeen 2383ad4eec61SEric Sandeen if (is_remount) { 2384da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2385ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2386da812f61SLukas Czerner return -EINVAL; 2387ad4eec61SEric Sandeen } 2388ad4eec61SEric Sandeen 2389461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2390ad4eec61SEric Sandeen if (error) { 2391da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2392461c3af0SLukas Czerner "journal device path"); 2393da812f61SLukas Czerner return -EINVAL; 2394ad4eec61SEric Sandeen } 2395ad4eec61SEric Sandeen 23962b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2397461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23986e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2399ad4eec61SEric Sandeen path_put(&path); 2400ba2e524dSLukas Czerner return 0; 2401ba2e524dSLukas Czerner } 2402ba2e524dSLukas Czerner case Opt_journal_ioprio: 2403461c3af0SLukas Czerner if (result.uint_32 > 7) { 2404da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 24050efb3b23SJan Kara " (must be 0-7)"); 2406da812f61SLukas Czerner return -EINVAL; 24070efb3b23SJan Kara } 2408461c3af0SLukas Czerner ctx->journal_ioprio = 2409461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 24106e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2411ba2e524dSLukas Czerner return 0; 2412ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 24136e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 24146e47a3ccSLukas Czerner if (param->type == fs_value_is_flag) { 24156e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 24166e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = NULL; 241702f960f8SLukas Czerner return 0; 24186e47a3ccSLukas Czerner } 24196e47a3ccSLukas Czerner if (*param->string && 24206e47a3ccSLukas Czerner !(!strcmp(param->string, "v1") || 24216e47a3ccSLukas Czerner !strcmp(param->string, "v2"))) { 24226e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 24236e47a3ccSLukas Czerner "Value of option \"%s\" is unrecognized", 24246e47a3ccSLukas Czerner param->key); 2425da812f61SLukas Czerner return -EINVAL; 242626092bf5STheodore Ts'o } 24276e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 24286e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size, 24296e47a3ccSLukas Czerner GFP_KERNEL); 24306e47a3ccSLukas Czerner #else 24316e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 24326e47a3ccSLukas Czerner "Test dummy encryption mount option ignored"); 24336e47a3ccSLukas Czerner #endif 2434ba2e524dSLukas Czerner return 0; 2435ba2e524dSLukas Czerner case Opt_dax: 2436ba2e524dSLukas Czerner case Opt_dax_type: 2437ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2438ba2e524dSLukas Czerner { 2439ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2440ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2441ba2e524dSLukas Czerner 2442ba2e524dSLukas Czerner switch (type) { 24439cb20f94SIra Weiny case Opt_dax: 24449cb20f94SIra Weiny case Opt_dax_always: 2445ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24466e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24479cb20f94SIra Weiny break; 24489cb20f94SIra Weiny case Opt_dax_never: 2449ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24506e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24519cb20f94SIra Weiny break; 24529cb20f94SIra Weiny case Opt_dax_inode: 24536e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24546e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24559cb20f94SIra Weiny /* Strictly for printing options */ 2456ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 24579cb20f94SIra Weiny break; 24589cb20f94SIra Weiny } 2459ba2e524dSLukas Czerner return 0; 2460ba2e524dSLukas Czerner } 2461ef83b6e8SDan Williams #else 2462da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2463da812f61SLukas Czerner return -EINVAL; 2464923ae0ffSRoss Zwisler #endif 2465ba2e524dSLukas Czerner case Opt_data_err: 2466ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 24676e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2468ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 24696e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2470ba2e524dSLukas Czerner return 0; 2471ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 247227b38686SOjaswin Mujoo if (result.int_32 == 1) { 247327b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 247427b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 247527b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 247627b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 247727b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 247827b38686SOjaswin Mujoo } else { 2479da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2480196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2481da812f61SLukas Czerner return -EINVAL; 2482196e402aSHarshad Shirwadkar } 2483ba2e524dSLukas Czerner return 0; 2484ba2e524dSLukas Czerner } 2485ba2e524dSLukas Czerner 2486ba2e524dSLukas Czerner /* 2487ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2488ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2489ba2e524dSLukas Czerner */ 2490ba2e524dSLukas Czerner if (m->token == Opt_err) { 2491ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2492ba2e524dSLukas Czerner param->key); 2493ba2e524dSLukas Czerner WARN_ON(1); 2494ba2e524dSLukas Czerner return -EINVAL; 2495ba2e524dSLukas Czerner } 2496ba2e524dSLukas Czerner 2497ba2e524dSLukas Czerner else { 2498461c3af0SLukas Czerner unsigned int set = 0; 2499461c3af0SLukas Czerner 2500461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2501461c3af0SLukas Czerner result.uint_32 > 0) 2502461c3af0SLukas Czerner set = 1; 2503461c3af0SLukas Czerner 250426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2505461c3af0SLukas Czerner set = !set; 250626092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2507da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2508461c3af0SLukas Czerner "buggy handling of option %s", 2509461c3af0SLukas Czerner param->key); 251026092bf5STheodore Ts'o WARN_ON(1); 2511da812f61SLukas Czerner return -EINVAL; 251226092bf5STheodore Ts'o } 2513995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2514461c3af0SLukas Czerner if (set != 0) 25156e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2516995a3ed6SHarshad Shirwadkar else 25176e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2518995a3ed6SHarshad Shirwadkar } else { 2519461c3af0SLukas Czerner if (set != 0) 25206e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 252126092bf5STheodore Ts'o else 25226e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 252326092bf5STheodore Ts'o } 2524995a3ed6SHarshad Shirwadkar } 2525ba2e524dSLukas Czerner 252602f960f8SLukas Czerner return 0; 252726092bf5STheodore Ts'o } 252826092bf5STheodore Ts'o 25297edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2530ac27a0ecSDave Kleikamp { 2531461c3af0SLukas Czerner struct fs_parameter param; 2532461c3af0SLukas Czerner int ret; 2533461c3af0SLukas Czerner char *key; 2534ac27a0ecSDave Kleikamp 2535ac27a0ecSDave Kleikamp if (!options) 25367edfd85bSLukas Czerner return 0; 2537461c3af0SLukas Czerner 2538461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2539461c3af0SLukas Czerner if (*key) { 2540461c3af0SLukas Czerner size_t v_len = 0; 2541461c3af0SLukas Czerner char *value = strchr(key, '='); 2542461c3af0SLukas Czerner 2543461c3af0SLukas Czerner param.type = fs_value_is_flag; 2544461c3af0SLukas Czerner param.string = NULL; 2545461c3af0SLukas Czerner 2546461c3af0SLukas Czerner if (value) { 2547461c3af0SLukas Czerner if (value == key) 2548ac27a0ecSDave Kleikamp continue; 2549461c3af0SLukas Czerner 2550461c3af0SLukas Czerner *value++ = 0; 2551461c3af0SLukas Czerner v_len = strlen(value); 2552461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2553461c3af0SLukas Czerner GFP_KERNEL); 2554461c3af0SLukas Czerner if (!param.string) 25557edfd85bSLukas Czerner return -ENOMEM; 2556461c3af0SLukas Czerner param.type = fs_value_is_string; 2557461c3af0SLukas Czerner } 2558461c3af0SLukas Czerner 2559461c3af0SLukas Czerner param.key = key; 2560461c3af0SLukas Czerner param.size = v_len; 2561461c3af0SLukas Czerner 256202f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2563461c3af0SLukas Czerner if (param.string) 2564461c3af0SLukas Czerner kfree(param.string); 2565461c3af0SLukas Czerner if (ret < 0) 25667edfd85bSLukas Czerner return ret; 2567ac27a0ecSDave Kleikamp } 2568461c3af0SLukas Czerner } 2569461c3af0SLukas Czerner 25707edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2571da812f61SLukas Czerner if (ret < 0) 25727edfd85bSLukas Czerner return ret; 25737edfd85bSLukas Czerner 25747edfd85bSLukas Czerner return 0; 25757edfd85bSLukas Czerner } 25767edfd85bSLukas Czerner 25777edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 25787edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 25797edfd85bSLukas Czerner { 25807edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 25817edfd85bSLukas Czerner char *s_mount_opts = NULL; 25827edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 25837edfd85bSLukas Czerner struct fs_context *fc = NULL; 25847edfd85bSLukas Czerner int ret = -ENOMEM; 25857edfd85bSLukas Czerner 25867edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2587da812f61SLukas Czerner return 0; 2588da812f61SLukas Czerner 25897edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 25907edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 25917edfd85bSLukas Czerner GFP_KERNEL); 25927edfd85bSLukas Czerner if (!s_mount_opts) 25937edfd85bSLukas Czerner return ret; 2594e6e268cbSLukas Czerner 25957edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 25967edfd85bSLukas Czerner if (!fc) 25977edfd85bSLukas Czerner goto out_free; 2598e6e268cbSLukas Czerner 25997edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 26007edfd85bSLukas Czerner if (!s_ctx) 26017edfd85bSLukas Czerner goto out_free; 26027edfd85bSLukas Czerner 26037edfd85bSLukas Czerner fc->fs_private = s_ctx; 26047edfd85bSLukas Czerner fc->s_fs_info = sbi; 26057edfd85bSLukas Czerner 26067edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 26077edfd85bSLukas Czerner if (ret < 0) 26087edfd85bSLukas Czerner goto parse_failed; 26097edfd85bSLukas Czerner 26107edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 26117edfd85bSLukas Czerner if (ret < 0) { 26127edfd85bSLukas Czerner parse_failed: 26137edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 26147edfd85bSLukas Czerner "failed to parse options in superblock: %s", 26157edfd85bSLukas Czerner s_mount_opts); 26167edfd85bSLukas Czerner ret = 0; 26177edfd85bSLukas Czerner goto out_free; 26187edfd85bSLukas Czerner } 26197edfd85bSLukas Czerner 26207edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 26217edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 26227edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 26237edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 26247edfd85bSLukas Czerner 26257edfd85bSLukas Czerner ret = ext4_apply_options(fc, sb); 26267edfd85bSLukas Czerner 26277edfd85bSLukas Czerner out_free: 26287edfd85bSLukas Czerner kfree(s_ctx); 26297edfd85bSLukas Czerner kfree(fc); 26307edfd85bSLukas Czerner kfree(s_mount_opts); 26317edfd85bSLukas Czerner return ret; 26324c94bff9SLukas Czerner } 26334c94bff9SLukas Czerner 2634e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2635e6e268cbSLukas Czerner struct super_block *sb) 2636e6e268cbSLukas Czerner { 2637e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 26386e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2639e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2640e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2641e6e268cbSLukas Czerner char *qname; 2642e6e268cbSLukas Czerner int i; 2643e6e268cbSLukas Czerner 26446e47a3ccSLukas Czerner if (quota_feature) 26456e47a3ccSLukas Czerner return; 26466e47a3ccSLukas Czerner 26476e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2648e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2649e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2650e6e268cbSLukas Czerner continue; 26516e47a3ccSLukas Czerner 2652e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 26534c1bd5a9SLukas Czerner if (qname) 26544c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2655e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 265613b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 265713b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 265813b215a9SLukas Czerner if (qname) 265913b215a9SLukas Czerner kfree_rcu(qname); 2660e6e268cbSLukas Czerner } 26616e47a3ccSLukas Czerner } 26626e47a3ccSLukas Czerner 26636e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 26646e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2665e6e268cbSLukas Czerner #endif 2666e6e268cbSLukas Czerner } 2667e6e268cbSLukas Czerner 2668e6e268cbSLukas Czerner /* 2669e6e268cbSLukas Czerner * Check quota settings consistency. 2670e6e268cbSLukas Czerner */ 2671e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2672e6e268cbSLukas Czerner struct super_block *sb) 2673e6e268cbSLukas Czerner { 2674e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2675e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2676e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2677e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2678e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 26796e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 26806e47a3ccSLukas Czerner int quota_flags, i; 2681e6e268cbSLukas Czerner 26826e47a3ccSLukas Czerner /* 26836e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 26846e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 26856e47a3ccSLukas Czerner * to support legacy quotas in quota files. 26866e47a3ccSLukas Czerner */ 26876e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 26886e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 26896e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 26906e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 26916e47a3ccSLukas Czerner return -EINVAL; 26926e47a3ccSLukas Czerner } 26936e47a3ccSLukas Czerner 26946e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 26956e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 26966e47a3ccSLukas Czerner if (quota_loaded && 26976e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 26986e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 26996e47a3ccSLukas Czerner goto err_quota_change; 27006e47a3ccSLukas Czerner 27016e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2702e6e268cbSLukas Czerner 2703e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2704e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2705e6e268cbSLukas Czerner continue; 2706e6e268cbSLukas Czerner 27076e47a3ccSLukas Czerner if (quota_loaded && 27086e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2709e6e268cbSLukas Czerner goto err_jquota_change; 2710e6e268cbSLukas Czerner 2711e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 271213b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2713e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2714e6e268cbSLukas Czerner goto err_jquota_specified; 2715e6e268cbSLukas Czerner } 27166e47a3ccSLukas Czerner 27176e47a3ccSLukas Czerner if (quota_feature) { 27186e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 27196e47a3ccSLukas Czerner "Journaled quota options ignored when " 27206e47a3ccSLukas Czerner "QUOTA feature is enabled"); 27216e47a3ccSLukas Czerner return 0; 27226e47a3ccSLukas Czerner } 2723e6e268cbSLukas Czerner } 2724e6e268cbSLukas Czerner 27256e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2726e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 27276e47a3ccSLukas Czerner goto err_jquota_change; 2728e6e268cbSLukas Czerner if (quota_feature) { 2729e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2730e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2731e6e268cbSLukas Czerner return 0; 2732e6e268cbSLukas Czerner } 2733e6e268cbSLukas Czerner } 27346e47a3ccSLukas Czerner 27356e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 27366e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 27376e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 27386e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 27396e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 27406e47a3ccSLukas Czerner 27416e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 27426e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 27436e47a3ccSLukas Czerner 27446e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 27456e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 27466e47a3ccSLukas Czerner 27476e47a3ccSLukas Czerner if (usr_qf_name) { 27486e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 27496e47a3ccSLukas Czerner usrquota = false; 27506e47a3ccSLukas Czerner } 27516e47a3ccSLukas Czerner if (grp_qf_name) { 27526e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 27536e47a3ccSLukas Czerner grpquota = false; 27546e47a3ccSLukas Czerner } 27556e47a3ccSLukas Czerner 27566e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 27576e47a3ccSLukas Czerner if (usrquota || grpquota) { 27586e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 27596e47a3ccSLukas Czerner "format mixing"); 27606e47a3ccSLukas Czerner return -EINVAL; 27616e47a3ccSLukas Czerner } 27626e47a3ccSLukas Czerner 27636e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 27646e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 27656e47a3ccSLukas Czerner "not specified"); 27666e47a3ccSLukas Czerner return -EINVAL; 27676e47a3ccSLukas Czerner } 27686e47a3ccSLukas Czerner } 27696e47a3ccSLukas Czerner 2770e6e268cbSLukas Czerner return 0; 2771e6e268cbSLukas Czerner 2772e6e268cbSLukas Czerner err_quota_change: 2773e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2774e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2775e6e268cbSLukas Czerner return -EINVAL; 2776e6e268cbSLukas Czerner err_jquota_change: 2777e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2778e6e268cbSLukas Czerner "options when quota turned on"); 2779e6e268cbSLukas Czerner return -EINVAL; 2780e6e268cbSLukas Czerner err_jquota_specified: 2781e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2782e6e268cbSLukas Czerner QTYPE2NAME(i)); 2783e6e268cbSLukas Czerner return -EINVAL; 2784e6e268cbSLukas Czerner #else 2785e6e268cbSLukas Czerner return 0; 2786e6e268cbSLukas Czerner #endif 2787e6e268cbSLukas Czerner } 2788e6e268cbSLukas Czerner 2789b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2790b6bd2435SLukas Czerner struct super_block *sb) 2791b6bd2435SLukas Czerner { 2792b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27936e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27946e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 2795b6bd2435SLukas Czerner 2796b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2797b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2798b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2799b6bd2435SLukas Czerner return -EINVAL; 2800b6bd2435SLukas Czerner } 2801b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2802b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2803b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2804b6bd2435SLukas Czerner return -EINVAL; 2805b6bd2435SLukas Czerner } 2806b6bd2435SLukas Czerner 28076e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 28086e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 28096e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 28106e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 28116e47a3ccSLukas Czerner ctx->s_want_extra_isize); 28126e47a3ccSLukas Czerner return -EINVAL; 28136e47a3ccSLukas Czerner } 28146e47a3ccSLukas Czerner 28156e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 28166e47a3ccSLukas Czerner int blocksize = 28176e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 28186e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 28196e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 28206e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 28216e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 28226e47a3ccSLukas Czerner } 28236e47a3ccSLukas Czerner 28246e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 28256e47a3ccSLukas Czerner /* 28266e47a3ccSLukas Czerner * This mount option is just for testing, and it's not worthwhile to 28276e47a3ccSLukas Czerner * implement the extra complexity (e.g. RCU protection) that would be 28286e47a3ccSLukas Czerner * needed to allow it to be set or changed during remount. We do allow 28296e47a3ccSLukas Czerner * it to be specified during remount, but only if there is no change. 28306e47a3ccSLukas Czerner */ 28316e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) && 28326e47a3ccSLukas Czerner is_remount && !sbi->s_dummy_enc_policy.policy) { 28336e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28346e47a3ccSLukas Czerner "Can't set test_dummy_encryption on remount"); 28356e47a3ccSLukas Czerner return -1; 28366e47a3ccSLukas Czerner } 28376e47a3ccSLukas Czerner #endif 28386e47a3ccSLukas Czerner 28396e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 28406e47a3ccSLukas Czerner if (!sbi->s_journal) { 28416e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28426e47a3ccSLukas Czerner "Remounting file system with no journal " 28436e47a3ccSLukas Czerner "so ignoring journalled data option"); 28446e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 28454c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 28464c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 28476e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 28486e47a3ccSLukas Czerner "on remount"); 28496e47a3ccSLukas Czerner return -EINVAL; 28506e47a3ccSLukas Czerner } 28516e47a3ccSLukas Czerner } 28526e47a3ccSLukas Czerner 28536e47a3ccSLukas Czerner if (is_remount) { 28546e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28556e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 28566e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 28576e47a3ccSLukas Czerner "both data=journal and dax"); 28586e47a3ccSLukas Czerner return -EINVAL; 28596e47a3ccSLukas Czerner } 28606e47a3ccSLukas Czerner 28616e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28626e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28636e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 28646e47a3ccSLukas Czerner fail_dax_change_remount: 28656e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 28666e47a3ccSLukas Czerner "dax mount option while remounting"); 28676e47a3ccSLukas Czerner return -EINVAL; 28686e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28696e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28706e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28716e47a3ccSLukas Czerner goto fail_dax_change_remount; 28726e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28736e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28746e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28756e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28766e47a3ccSLukas Czerner goto fail_dax_change_remount; 28776e47a3ccSLukas Czerner } 28786e47a3ccSLukas Czerner } 28796e47a3ccSLukas Czerner 2880b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2881b6bd2435SLukas Czerner } 2882b6bd2435SLukas Czerner 28836e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28846e47a3ccSLukas Czerner { 28856e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28866e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28876e47a3ccSLukas Czerner int ret = 0; 28886e47a3ccSLukas Czerner 28896e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28906e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28916e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28926e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28936e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 28946e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28956e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28966e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28976e47a3ccSLukas Czerner 2898960e0ab6SLukas Czerner /* 2899960e0ab6SLukas Czerner * i_version differs from common mount option iversion so we have 2900960e0ab6SLukas Czerner * to let vfs know that it was set, otherwise it would get cleared 2901960e0ab6SLukas Czerner * on remount 2902960e0ab6SLukas Czerner */ 2903960e0ab6SLukas Czerner if (ctx->mask_s_flags & SB_I_VERSION) 2904960e0ab6SLukas Czerner fc->sb_flags |= SB_I_VERSION; 2905960e0ab6SLukas Czerner 29066e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 29076e47a3ccSLukas Czerner APPLY(s_commit_interval); 29086e47a3ccSLukas Czerner APPLY(s_stripe); 29096e47a3ccSLukas Czerner APPLY(s_max_batch_time); 29106e47a3ccSLukas Czerner APPLY(s_min_batch_time); 29116e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 29126e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 29136e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 29146e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 29156e47a3ccSLukas Czerner APPLY(s_resgid); 29166e47a3ccSLukas Czerner APPLY(s_resuid); 29176e47a3ccSLukas Czerner 29186e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 29196e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 29206e47a3ccSLukas Czerner #endif 29216e47a3ccSLukas Czerner 29226e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 29236e47a3ccSLukas Czerner 29246e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) 29256e47a3ccSLukas Czerner ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg); 29266e47a3ccSLukas Czerner 29276e47a3ccSLukas Czerner return ret; 29286e47a3ccSLukas Czerner } 29296e47a3ccSLukas Czerner 29306e47a3ccSLukas Czerner 2931da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 29324c94bff9SLukas Czerner { 2933ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 29346e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29354c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 29366e47a3ccSLukas Czerner 29376e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 29386e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 29396e47a3ccSLukas Czerner 294033458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 29416e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 29426e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2943ac27a0ecSDave Kleikamp 29446e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 29456e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2946ac27a0ecSDave Kleikamp 29476e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 29486e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2949da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2950b31e1552SEric Sandeen "format mixing"); 2951da812f61SLukas Czerner return -EINVAL; 2952ac27a0ecSDave Kleikamp } 2953ac27a0ecSDave Kleikamp } 2954ac27a0ecSDave Kleikamp #endif 29556e47a3ccSLukas Czerner return 1; 2956ac27a0ecSDave Kleikamp } 2957ac27a0ecSDave Kleikamp 29582adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 29592adf6da8STheodore Ts'o struct super_block *sb) 29602adf6da8STheodore Ts'o { 29612adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 29622adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 296333458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 29642adf6da8STheodore Ts'o 29652adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 29662adf6da8STheodore Ts'o char *fmtname = ""; 29672adf6da8STheodore Ts'o 29682adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 29692adf6da8STheodore Ts'o case QFMT_VFS_OLD: 29702adf6da8STheodore Ts'o fmtname = "vfsold"; 29712adf6da8STheodore Ts'o break; 29722adf6da8STheodore Ts'o case QFMT_VFS_V0: 29732adf6da8STheodore Ts'o fmtname = "vfsv0"; 29742adf6da8STheodore Ts'o break; 29752adf6da8STheodore Ts'o case QFMT_VFS_V1: 29762adf6da8STheodore Ts'o fmtname = "vfsv1"; 29772adf6da8STheodore Ts'o break; 29782adf6da8STheodore Ts'o } 29792adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29802adf6da8STheodore Ts'o } 29812adf6da8STheodore Ts'o 298233458eabSTheodore Ts'o rcu_read_lock(); 298333458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 298433458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 298533458eabSTheodore Ts'o if (usr_qf_name) 298633458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 298733458eabSTheodore Ts'o if (grp_qf_name) 298833458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 298933458eabSTheodore Ts'o rcu_read_unlock(); 29902adf6da8STheodore Ts'o #endif 29912adf6da8STheodore Ts'o } 29922adf6da8STheodore Ts'o 29935a916be1STheodore Ts'o static const char *token2str(int token) 29945a916be1STheodore Ts'o { 299597d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29965a916be1STheodore Ts'o 299797d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 299897d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29995a916be1STheodore Ts'o break; 300097d8a670SLukas Czerner return spec->name; 30015a916be1STheodore Ts'o } 30025a916be1STheodore Ts'o 30032adf6da8STheodore Ts'o /* 30042adf6da8STheodore Ts'o * Show an option if 30052adf6da8STheodore Ts'o * - it's set to a non-default value OR 30062adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 30072adf6da8STheodore Ts'o */ 300866acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 300966acdcf4STheodore Ts'o int nodefs) 30102adf6da8STheodore Ts'o { 30112adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30122adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 301368afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 30145a916be1STheodore Ts'o const struct mount_opts *m; 301566acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 30162adf6da8STheodore Ts'o 301766acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 301866acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 30192adf6da8STheodore Ts'o 30202adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 30215a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 30225a916be1STheodore Ts'o 30235a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 30245a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 30255a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 3026ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 30275a916be1STheodore Ts'o continue; 302868afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 30295a916be1STheodore Ts'o continue; /* skip if same as the default */ 30305a916be1STheodore Ts'o if ((want_set && 30315a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 30325a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 30335a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 30345a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 30355a916be1STheodore Ts'o } 30365a916be1STheodore Ts'o 303708cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 30385a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 303908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 304008cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 304108cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 30425a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 304308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 304408cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 304566acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 30465a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 30475a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 30482adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 30495a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 30502adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 30515a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 305266acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 30535a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 305466acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 30555a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 305666acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 30575a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 3058357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 30595a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 306066acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 30615a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 306268afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 306368afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 30642adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30655a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30662adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30675a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30682adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30695a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30705a916be1STheodore Ts'o } 307166acdcf4STheodore Ts'o if (nodefs || 307266acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30735a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30742adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30752adf6da8STheodore Ts'o 3076ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 307766acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30785a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3079df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3080df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30817915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30827915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3083ed318a6cSEric Biggers 3084ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30852adf6da8STheodore Ts'o 30864f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30874f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30884f74d15fSEric Biggers 30899cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30909cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30919cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30929cb20f94SIra Weiny else 30939cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30949cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30959cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30969cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30979cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30989cb20f94SIra Weiny } 30992adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 31002adf6da8STheodore Ts'o return 0; 31012adf6da8STheodore Ts'o } 31022adf6da8STheodore Ts'o 310366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 310466acdcf4STheodore Ts'o { 310566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 310666acdcf4STheodore Ts'o } 310766acdcf4STheodore Ts'o 3108ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 310966acdcf4STheodore Ts'o { 311066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 311166acdcf4STheodore Ts'o int rc; 311266acdcf4STheodore Ts'o 3113bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 311466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 311566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 311666acdcf4STheodore Ts'o return rc; 311766acdcf4STheodore Ts'o } 311866acdcf4STheodore Ts'o 3119617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3120ac27a0ecSDave Kleikamp int read_only) 3121ac27a0ecSDave Kleikamp { 3122617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3123c89128a0SJaegeuk Kim int err = 0; 3124ac27a0ecSDave Kleikamp 3125617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3127b31e1552SEric Sandeen "forcing read-only mode"); 3128c89128a0SJaegeuk Kim err = -EROFS; 31295adaccacSyangerkun goto done; 3130ac27a0ecSDave Kleikamp } 3131ac27a0ecSDave Kleikamp if (read_only) 3132281b5995STheodore Ts'o goto done; 3133617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3134b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3135b31e1552SEric Sandeen "running e2fsck is recommended"); 3136c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3137b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3138b31e1552SEric Sandeen "warning: mounting fs with errors, " 3139b31e1552SEric Sandeen "running e2fsck is recommended"); 3140ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3141ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3142ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3143b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3144b31e1552SEric Sandeen "warning: maximal mount count reached, " 3145b31e1552SEric Sandeen "running e2fsck is recommended"); 3146ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 31476a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 31486a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3149b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3150b31e1552SEric Sandeen "warning: checktime reached, " 3151b31e1552SEric Sandeen "running e2fsck is recommended"); 31520390131bSFrank Mayhar if (!sbi->s_journal) 3153216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3154ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3155617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3156e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31576a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 315802f310fcSJan Kara if (sbi->s_journal) { 3159e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 316002f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 316102f310fcSJan Kara ext4_set_feature_orphan_present(sb); 316202f310fcSJan Kara } 3163ac27a0ecSDave Kleikamp 31644392fbc4SJan Kara err = ext4_commit_super(sb); 3165281b5995STheodore Ts'o done: 3166ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3167a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3168a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3169ac27a0ecSDave Kleikamp sb->s_blocksize, 3170ac27a0ecSDave Kleikamp sbi->s_groups_count, 3171617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3172617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3173a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3174c89128a0SJaegeuk Kim return err; 3175ac27a0ecSDave Kleikamp } 3176ac27a0ecSDave Kleikamp 3177117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3178117fff10STheodore Ts'o { 3179117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31807c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 318137b0b6b8SDan Carpenter int size, i, j; 3182117fff10STheodore Ts'o 3183117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3184117fff10STheodore Ts'o return 0; 3185117fff10STheodore Ts'o 3186117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3187117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3188117fff10STheodore Ts'o return 0; 3189117fff10STheodore Ts'o 31907c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31917c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3192117fff10STheodore Ts'o if (!new_groups) { 31937c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31947c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3195117fff10STheodore Ts'o return -ENOMEM; 3196117fff10STheodore Ts'o } 31977c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31987c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31997c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 32007c990728SSuraj Jitindar Singh GFP_KERNEL); 32017c990728SSuraj Jitindar Singh if (!new_groups[i]) { 320237b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 320337b0b6b8SDan Carpenter kvfree(new_groups[j]); 32047c990728SSuraj Jitindar Singh kvfree(new_groups); 32057c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32067c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 32077c990728SSuraj Jitindar Singh return -ENOMEM; 3208117fff10STheodore Ts'o } 32097c990728SSuraj Jitindar Singh } 32107c990728SSuraj Jitindar Singh rcu_read_lock(); 32117c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 32127c990728SSuraj Jitindar Singh if (old_groups) 32137c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 32147c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 32157c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 32167c990728SSuraj Jitindar Singh rcu_read_unlock(); 32177c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 32187c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 32197c990728SSuraj Jitindar Singh if (old_groups) 32207c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3221117fff10STheodore Ts'o return 0; 3222117fff10STheodore Ts'o } 3223117fff10STheodore Ts'o 3224772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3225772cb7c8SJose R. Santos { 3226772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3227772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 32287c990728SSuraj Jitindar Singh struct flex_groups *fg; 3229772cb7c8SJose R. Santos ext4_group_t flex_group; 3230117fff10STheodore Ts'o int i, err; 3231772cb7c8SJose R. Santos 3232503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3233d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3234772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3235772cb7c8SJose R. Santos return 1; 3236772cb7c8SJose R. Santos } 3237772cb7c8SJose R. Santos 3238117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3239117fff10STheodore Ts'o if (err) 3240772cb7c8SJose R. Santos goto failed; 3241772cb7c8SJose R. Santos 3242772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 324388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3244772cb7c8SJose R. Santos 3245772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 32467c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 32477c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 324890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 32497c990728SSuraj Jitindar Singh &fg->free_clusters); 32507c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3251772cb7c8SJose R. Santos } 3252772cb7c8SJose R. Santos 3253772cb7c8SJose R. Santos return 1; 3254772cb7c8SJose R. Santos failed: 3255772cb7c8SJose R. Santos return 0; 3256772cb7c8SJose R. Santos } 3257772cb7c8SJose R. Santos 3258e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3259717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3260717d50e4SAndreas Dilger { 3261b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3262717d50e4SAndreas Dilger __u16 crc = 0; 3263717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3264e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3265717d50e4SAndreas Dilger 32669aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3267feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3268feb0ab32SDarrick J. Wong __u32 csum32; 3269b47820edSDaeho Jeong __u16 dummy_csum = 0; 3270feb0ab32SDarrick J. Wong 3271feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3272feb0ab32SDarrick J. Wong sizeof(le_group)); 3273b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3274b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3275b47820edSDaeho Jeong sizeof(dummy_csum)); 3276b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3277b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3278b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3279b47820edSDaeho Jeong sbi->s_desc_size - offset); 3280feb0ab32SDarrick J. Wong 3281feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3282feb0ab32SDarrick J. Wong goto out; 3283feb0ab32SDarrick J. Wong } 3284feb0ab32SDarrick J. Wong 3285feb0ab32SDarrick J. Wong /* old crc16 code */ 3286e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3287813d32f9SDarrick J. Wong return 0; 3288813d32f9SDarrick J. Wong 3289717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3290717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3291717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3292717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3293717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3294e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3295717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3296717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3297717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3298717d50e4SAndreas Dilger offset); 3299717d50e4SAndreas Dilger 3300feb0ab32SDarrick J. Wong out: 3301717d50e4SAndreas Dilger return cpu_to_le16(crc); 3302717d50e4SAndreas Dilger } 3303717d50e4SAndreas Dilger 3304feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3305717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3306717d50e4SAndreas Dilger { 3307feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3308e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3309717d50e4SAndreas Dilger return 0; 3310717d50e4SAndreas Dilger 3311717d50e4SAndreas Dilger return 1; 3312717d50e4SAndreas Dilger } 3313717d50e4SAndreas Dilger 3314feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3315feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3316feb0ab32SDarrick J. Wong { 3317feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3318feb0ab32SDarrick J. Wong return; 3319e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3320feb0ab32SDarrick J. Wong } 3321feb0ab32SDarrick J. Wong 3322ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3323bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3324829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3325bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3326ac27a0ecSDave Kleikamp { 3327617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3328617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3329617ba13bSMingming Cao ext4_fsblk_t last_block; 333044de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3331bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3332bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3333bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3334ce421581SJose R. Santos int flexbg_flag = 0; 3335bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3336ac27a0ecSDave Kleikamp 3337e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3338ce421581SJose R. Santos flexbg_flag = 1; 3339ce421581SJose R. Santos 3340617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3341ac27a0ecSDave Kleikamp 3342197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3343197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3344197cd65aSAkinobu Mita 3345ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3346bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3347ac27a0ecSDave Kleikamp else 3348ac27a0ecSDave Kleikamp last_block = first_block + 3349617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3350ac27a0ecSDave Kleikamp 3351bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3352bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3353bfff6873SLukas Czerner grp = i; 3354bfff6873SLukas Czerner 33558fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3356829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3357829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3358829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3359829fa70dSTheodore Ts'o "superblock", i); 336018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 336118db4b4eSTheodore Ts'o return 0; 3362829fa70dSTheodore Ts'o } 336377260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 336477260807STheodore Ts'o block_bitmap <= last_bg_block) { 336577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 336677260807STheodore Ts'o "Block bitmap for group %u overlaps " 336777260807STheodore Ts'o "block group descriptors", i); 336877260807STheodore Ts'o if (!sb_rdonly(sb)) 336977260807STheodore Ts'o return 0; 337077260807STheodore Ts'o } 33712b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3372b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3373a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3374b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3375ac27a0ecSDave Kleikamp return 0; 3376ac27a0ecSDave Kleikamp } 33778fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3378829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3379829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3380829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3381829fa70dSTheodore Ts'o "superblock", i); 338218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 338318db4b4eSTheodore Ts'o return 0; 3384829fa70dSTheodore Ts'o } 338577260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 338677260807STheodore Ts'o inode_bitmap <= last_bg_block) { 338777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 338877260807STheodore Ts'o "Inode bitmap for group %u overlaps " 338977260807STheodore Ts'o "block group descriptors", i); 339077260807STheodore Ts'o if (!sb_rdonly(sb)) 339177260807STheodore Ts'o return 0; 339277260807STheodore Ts'o } 33932b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3394b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3395a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3396b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3397ac27a0ecSDave Kleikamp return 0; 3398ac27a0ecSDave Kleikamp } 33998fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3400829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3401829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3402829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3403829fa70dSTheodore Ts'o "superblock", i); 340418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 340518db4b4eSTheodore Ts'o return 0; 3406829fa70dSTheodore Ts'o } 340777260807STheodore Ts'o if (inode_table >= sb_block + 1 && 340877260807STheodore Ts'o inode_table <= last_bg_block) { 340977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 341077260807STheodore Ts'o "Inode table for group %u overlaps " 341177260807STheodore Ts'o "block group descriptors", i); 341277260807STheodore Ts'o if (!sb_rdonly(sb)) 341377260807STheodore Ts'o return 0; 341477260807STheodore Ts'o } 3415bd81d8eeSLaurent Vivier if (inode_table < first_block || 34162b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3417b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3418a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3419b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3420ac27a0ecSDave Kleikamp return 0; 3421ac27a0ecSDave Kleikamp } 3422955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3423feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3424b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3425b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3426e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3427fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3428bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3429955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3430717d50e4SAndreas Dilger return 0; 3431717d50e4SAndreas Dilger } 34327ee1ec4cSLi Zefan } 3433955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3434ce421581SJose R. Santos if (!flexbg_flag) 3435617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3436ac27a0ecSDave Kleikamp } 3437bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3438bfff6873SLukas Czerner *first_not_zeroed = grp; 3439ac27a0ecSDave Kleikamp return 1; 3440ac27a0ecSDave Kleikamp } 3441ac27a0ecSDave Kleikamp 3442cd2291a4SEric Sandeen /* 3443cd2291a4SEric Sandeen * Maximal extent format file size. 3444cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3445cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3446cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3447cd2291a4SEric Sandeen * so that won't be a limiting factor. 3448cd2291a4SEric Sandeen * 3449f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3450f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3451f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3452f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3453f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3454f17722f9SLukas Czerner * 3455cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3456cd2291a4SEric Sandeen */ 3457f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3458cd2291a4SEric Sandeen { 3459cd2291a4SEric Sandeen loff_t res; 3460cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3461cd2291a4SEric Sandeen 346272deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 346372deb455SChristoph Hellwig 346472deb455SChristoph Hellwig if (!has_huge_files) { 3465cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3466cd2291a4SEric Sandeen 3467cd2291a4SEric Sandeen /* total blocks in file system block size */ 3468cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3469cd2291a4SEric Sandeen upper_limit <<= blkbits; 3470cd2291a4SEric Sandeen } 3471cd2291a4SEric Sandeen 3472f17722f9SLukas Czerner /* 3473f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3474f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3475f17722f9SLukas Czerner * size 3476f17722f9SLukas Czerner */ 3477f17722f9SLukas Czerner res = (1LL << 32) - 1; 3478cd2291a4SEric Sandeen res <<= blkbits; 3479cd2291a4SEric Sandeen 3480cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3481cd2291a4SEric Sandeen if (res > upper_limit) 3482cd2291a4SEric Sandeen res = upper_limit; 3483cd2291a4SEric Sandeen 3484cd2291a4SEric Sandeen return res; 3485cd2291a4SEric Sandeen } 3486ac27a0ecSDave Kleikamp 3487ac27a0ecSDave Kleikamp /* 3488cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34890fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34900fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3491ac27a0ecSDave Kleikamp */ 3492f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3493ac27a0ecSDave Kleikamp { 34945c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34950fc1b451SAneesh Kumar K.V int meta_blocks; 34965c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 349775ca6ad4SRitesh Harjani 349875ca6ad4SRitesh Harjani /* 349975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 35000b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 35010b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 35020b8e58a1SAndreas Dilger * 35030b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 35040b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 35050fc1b451SAneesh Kumar K.V */ 350672deb455SChristoph Hellwig if (!has_huge_files) { 35070fc1b451SAneesh Kumar K.V /* 350872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 350972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 351072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 35110fc1b451SAneesh Kumar K.V */ 35120fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 35130fc1b451SAneesh Kumar K.V 35140fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 35150fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 35160fc1b451SAneesh Kumar K.V 35170fc1b451SAneesh Kumar K.V } else { 35188180a562SAneesh Kumar K.V /* 35198180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 35208180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 35218180a562SAneesh Kumar K.V * represent total number of blocks in 35228180a562SAneesh Kumar K.V * file system block size 35238180a562SAneesh Kumar K.V */ 35240fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 35250fc1b451SAneesh Kumar K.V 35260fc1b451SAneesh Kumar K.V } 35270fc1b451SAneesh Kumar K.V 35285c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 35295c93e8ecSZhang Yi res += ppb; 35305c93e8ecSZhang Yi res += ppb * ppb; 35315c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 35325c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 35335c93e8ecSZhang Yi meta_blocks = 1; 35345c93e8ecSZhang Yi meta_blocks += 1 + ppb; 35355c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 35365c93e8ecSZhang Yi /* Does block tree limit file size? */ 35375c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 35385c93e8ecSZhang Yi goto check_lfs; 35395c93e8ecSZhang Yi 35405c93e8ecSZhang Yi res = upper_limit; 35415c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 35425c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 35430fc1b451SAneesh Kumar K.V /* indirect blocks */ 35440fc1b451SAneesh Kumar K.V meta_blocks = 1; 35455c93e8ecSZhang Yi upper_limit -= ppb; 35460fc1b451SAneesh Kumar K.V /* double indirect blocks */ 35475c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 35485c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 35495c93e8ecSZhang Yi res -= meta_blocks; 35505c93e8ecSZhang Yi goto check_lfs; 35515c93e8ecSZhang Yi } 35525c93e8ecSZhang Yi meta_blocks += 1 + ppb; 35535c93e8ecSZhang Yi upper_limit -= ppb * ppb; 35545c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 35555c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 35565c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 35575c93e8ecSZhang Yi res -= meta_blocks; 35585c93e8ecSZhang Yi check_lfs: 3559ac27a0ecSDave Kleikamp res <<= bits; 35600fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35610fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35620fc1b451SAneesh Kumar K.V 35635c93e8ecSZhang Yi return res; 3564ac27a0ecSDave Kleikamp } 3565ac27a0ecSDave Kleikamp 3566617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 356770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3568ac27a0ecSDave Kleikamp { 3569617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3570fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3571ac27a0ecSDave Kleikamp int has_super = 0; 3572ac27a0ecSDave Kleikamp 3573ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3574ac27a0ecSDave Kleikamp 3575e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 357670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3577ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3578617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3579ac27a0ecSDave Kleikamp has_super = 1; 35800b8e58a1SAndreas Dilger 3581bd63f6b0SDarrick J. Wong /* 3582bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3583bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3584bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3585bd63f6b0SDarrick J. Wong * compensate. 3586bd63f6b0SDarrick J. Wong */ 3587bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 358849598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3589bd63f6b0SDarrick J. Wong has_super++; 3590bd63f6b0SDarrick J. Wong 3591617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3592ac27a0ecSDave Kleikamp } 3593ac27a0ecSDave Kleikamp 3594c9de560dSAlex Tomas /** 3595c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3596c9de560dSAlex Tomas * @sbi: In memory super block info 3597c9de560dSAlex Tomas * 3598c9de560dSAlex Tomas * If we have specified it via mount option, then 3599c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3600c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3601c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3602c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3603c9de560dSAlex Tomas * 3604c9de560dSAlex Tomas */ 3605c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3606c9de560dSAlex Tomas { 3607c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3608c9de560dSAlex Tomas unsigned long stripe_width = 3609c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 36103eb08658SDan Ehrenberg int ret; 3611c9de560dSAlex Tomas 3612c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 36133eb08658SDan Ehrenberg ret = sbi->s_stripe; 36145469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 36153eb08658SDan Ehrenberg ret = stripe_width; 36165469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 36173eb08658SDan Ehrenberg ret = stride; 36183eb08658SDan Ehrenberg else 36193eb08658SDan Ehrenberg ret = 0; 3620c9de560dSAlex Tomas 36213eb08658SDan Ehrenberg /* 36223eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 36233eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 36243eb08658SDan Ehrenberg */ 36253eb08658SDan Ehrenberg if (ret <= 1) 36263eb08658SDan Ehrenberg ret = 0; 3627c9de560dSAlex Tomas 36283eb08658SDan Ehrenberg return ret; 3629c9de560dSAlex Tomas } 3630ac27a0ecSDave Kleikamp 3631a13fb1a4SEric Sandeen /* 3632a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3633a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3634a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3635a13fb1a4SEric Sandeen * 0 if it cannot be. 3636a13fb1a4SEric Sandeen */ 363725c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3638a13fb1a4SEric Sandeen { 3639e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3640a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3641a13fb1a4SEric Sandeen "Couldn't mount because of " 3642a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3643a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3644a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3645a13fb1a4SEric Sandeen return 0; 3646a13fb1a4SEric Sandeen } 3647a13fb1a4SEric Sandeen 36485298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3649c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3650c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3651c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3652c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3653c83ad55eSGabriel Krisman Bertazi return 0; 3654c83ad55eSGabriel Krisman Bertazi } 3655c83ad55eSGabriel Krisman Bertazi #endif 3656c83ad55eSGabriel Krisman Bertazi 3657a13fb1a4SEric Sandeen if (readonly) 3658a13fb1a4SEric Sandeen return 1; 3659a13fb1a4SEric Sandeen 3660e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36612cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36621751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36632cb5cc8bSDarrick J. Wong return 1; 36642cb5cc8bSDarrick J. Wong } 36652cb5cc8bSDarrick J. Wong 3666a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3667e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3668a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3669a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3670a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3671a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3672a13fb1a4SEric Sandeen return 0; 3673a13fb1a4SEric Sandeen } 3674e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3675bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3676bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3677bab08ab9STheodore Ts'o "extents feature\n"); 3678bab08ab9STheodore Ts'o return 0; 3679bab08ab9STheodore Ts'o } 36807c319d32SAditya Kali 36819db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3682d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3683d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36847c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3685d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3686689c958cSLi Xi return 0; 3687689c958cSLi Xi } 36887c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3689a13fb1a4SEric Sandeen return 1; 3690a13fb1a4SEric Sandeen } 3691a13fb1a4SEric Sandeen 369266e61a9eSTheodore Ts'o /* 369366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 369466e61a9eSTheodore Ts'o * on the file system 369566e61a9eSTheodore Ts'o */ 3696235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 369766e61a9eSTheodore Ts'o { 3698235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3699235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3700235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 370166e61a9eSTheodore Ts'o 370266e61a9eSTheodore Ts'o if (es->s_error_count) 3703ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3704ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 370566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 370666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 37076a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 37086a0678a7SArnd Bergmann sb->s_id, 37096a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 371066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 371166e61a9eSTheodore Ts'o es->s_first_error_func, 371266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 371366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3714651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 371566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 371666e61a9eSTheodore Ts'o if (es->s_first_error_block) 3717651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 371866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3719651e1c3bSJoe Perches printk(KERN_CONT "\n"); 372066e61a9eSTheodore Ts'o } 372166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 37226a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 37236a0678a7SArnd Bergmann sb->s_id, 37246a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 372566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 372666e61a9eSTheodore Ts'o es->s_last_error_func, 372766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 372866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3729651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 373066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 373166e61a9eSTheodore Ts'o if (es->s_last_error_block) 3732651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 373366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3734651e1c3bSJoe Perches printk(KERN_CONT "\n"); 373566e61a9eSTheodore Ts'o } 373666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 373766e61a9eSTheodore Ts'o } 373866e61a9eSTheodore Ts'o 3739bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3740bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3741bfff6873SLukas Czerner { 3742bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 37433d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 37443d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 37453d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 37463d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3747bfff6873SLukas Czerner int ret = 0; 374839fec688SShaoying Xu u64 start_time; 3749bfff6873SLukas Czerner 37503d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37513d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 37523d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 37533d392b26STheodore Ts'o if (prefetch_ios) 37543d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 37553d392b26STheodore Ts'o prefetch_ios); 37563d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 37573d392b26STheodore Ts'o prefetch_ios); 37583d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37593d392b26STheodore Ts'o ret = 1; 37603d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37613d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37623d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37633d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37643d392b26STheodore Ts'o ret = 0; 37653d392b26STheodore Ts'o } 37663d392b26STheodore Ts'o } 37673d392b26STheodore Ts'o return ret; 37683d392b26STheodore Ts'o } 3769bfff6873SLukas Czerner 37703d392b26STheodore Ts'o for (; group < ngroups; group++) { 3771bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3772bfff6873SLukas Czerner if (!gdp) { 3773bfff6873SLukas Czerner ret = 1; 3774bfff6873SLukas Czerner break; 3775bfff6873SLukas Czerner } 3776bfff6873SLukas Czerner 3777bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3778bfff6873SLukas Czerner break; 3779bfff6873SLukas Czerner } 3780bfff6873SLukas Czerner 37817f511862STheodore Ts'o if (group >= ngroups) 3782bfff6873SLukas Czerner ret = 1; 3783bfff6873SLukas Czerner 3784bfff6873SLukas Czerner if (!ret) { 378539fec688SShaoying Xu start_time = ktime_get_real_ns(); 3786bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3787bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37883d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3789bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 379039fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 379139fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3792bfff6873SLukas Czerner } 3793bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3794bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3795bfff6873SLukas Czerner } 3796bfff6873SLukas Czerner return ret; 3797bfff6873SLukas Czerner } 3798bfff6873SLukas Czerner 3799bfff6873SLukas Czerner /* 3800bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 38014ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3802bfff6873SLukas Czerner */ 3803bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3804bfff6873SLukas Czerner { 3805bfff6873SLukas Czerner if (!elr) 3806bfff6873SLukas Czerner return; 3807bfff6873SLukas Czerner 3808bfff6873SLukas Czerner list_del(&elr->lr_request); 38093d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3810bfff6873SLukas Czerner kfree(elr); 3811bfff6873SLukas Czerner } 3812bfff6873SLukas Czerner 3813bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3814bfff6873SLukas Czerner { 38151bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 38161bb933fbSLukas Czerner if (!ext4_li_info) { 38171bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3818bfff6873SLukas Czerner return; 38191bb933fbSLukas Czerner } 3820bfff6873SLukas Czerner 3821bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 38221bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3823bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 38241bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3825bfff6873SLukas Czerner } 3826bfff6873SLukas Czerner 38278f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 38288f1f7453SEric Sandeen 3829bfff6873SLukas Czerner /* 3830bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3831bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3832bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3833bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3834bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3835bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3836bfff6873SLukas Czerner * next waking time and put itself into sleep. 3837bfff6873SLukas Czerner */ 3838bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3839bfff6873SLukas Czerner { 3840bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3841bfff6873SLukas Czerner struct list_head *pos, *n; 3842bfff6873SLukas Czerner struct ext4_li_request *elr; 38434ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3844bfff6873SLukas Czerner 3845bfff6873SLukas Czerner BUG_ON(NULL == eli); 3846bfff6873SLukas Czerner 3847bfff6873SLukas Czerner cont_thread: 3848bfff6873SLukas Czerner while (true) { 3849bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3850bfff6873SLukas Czerner 3851bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3852bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3853bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3854bfff6873SLukas Czerner goto exit_thread; 3855bfff6873SLukas Czerner } 3856bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3857e22834f0SDmitry Monakhov int err = 0; 3858e22834f0SDmitry Monakhov int progress = 0; 3859bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3860bfff6873SLukas Czerner lr_request); 3861bfff6873SLukas Czerner 3862e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3863e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3864e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3865e22834f0SDmitry Monakhov continue; 3866e22834f0SDmitry Monakhov } 3867e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3868e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3869e22834f0SDmitry Monakhov progress = 1; 3870e22834f0SDmitry Monakhov /* 3871e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3872e22834f0SDmitry Monakhov * be removed from the list, it is 3873e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3874e22834f0SDmitry Monakhov */ 3875e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3876e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3877e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3878e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3879e22834f0SDmitry Monakhov n = pos->next; 3880e22834f0SDmitry Monakhov } 3881e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3882e22834f0SDmitry Monakhov } 3883b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3884e22834f0SDmitry Monakhov if (err) { 3885bfff6873SLukas Czerner ext4_remove_li_request(elr); 3886bfff6873SLukas Czerner continue; 3887bfff6873SLukas Czerner } 3888e22834f0SDmitry Monakhov if (!progress) { 3889e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3890e22834f0SDmitry Monakhov (prandom_u32() 3891e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3892b2c78cd0STheodore Ts'o } 3893bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3894bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3895bfff6873SLukas Czerner } 3896bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3897bfff6873SLukas Czerner 3898a0acae0eSTejun Heo try_to_freeze(); 3899bfff6873SLukas Czerner 39004ed5c033SLukas Czerner cur = jiffies; 39014ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3902f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3903bfff6873SLukas Czerner cond_resched(); 3904bfff6873SLukas Czerner continue; 3905bfff6873SLukas Czerner } 3906bfff6873SLukas Czerner 39074ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 39084ed5c033SLukas Czerner 39098f1f7453SEric Sandeen if (kthread_should_stop()) { 39108f1f7453SEric Sandeen ext4_clear_request_list(); 39118f1f7453SEric Sandeen goto exit_thread; 39128f1f7453SEric Sandeen } 3913bfff6873SLukas Czerner } 3914bfff6873SLukas Czerner 3915bfff6873SLukas Czerner exit_thread: 3916bfff6873SLukas Czerner /* 3917bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3918bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3919bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3920bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3921bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3922bfff6873SLukas Czerner * new one. 3923bfff6873SLukas Czerner */ 3924bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3925bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3926bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3927bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3928bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3929bfff6873SLukas Czerner goto cont_thread; 3930bfff6873SLukas Czerner } 3931bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3932bfff6873SLukas Czerner kfree(ext4_li_info); 3933bfff6873SLukas Czerner ext4_li_info = NULL; 3934bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3935bfff6873SLukas Czerner 3936bfff6873SLukas Czerner return 0; 3937bfff6873SLukas Czerner } 3938bfff6873SLukas Czerner 3939bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3940bfff6873SLukas Czerner { 3941bfff6873SLukas Czerner struct list_head *pos, *n; 3942bfff6873SLukas Czerner struct ext4_li_request *elr; 3943bfff6873SLukas Czerner 3944bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3945bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3946bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3947bfff6873SLukas Czerner lr_request); 3948bfff6873SLukas Czerner ext4_remove_li_request(elr); 3949bfff6873SLukas Czerner } 3950bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3951bfff6873SLukas Czerner } 3952bfff6873SLukas Czerner 3953bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3954bfff6873SLukas Czerner { 39558f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39568f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39578f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39588f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3959bfff6873SLukas Czerner ext4_clear_request_list(); 3960bfff6873SLukas Czerner kfree(ext4_li_info); 3961bfff6873SLukas Czerner ext4_li_info = NULL; 396292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3963bfff6873SLukas Czerner "initialization thread\n", 3964bfff6873SLukas Czerner err); 3965bfff6873SLukas Czerner return err; 3966bfff6873SLukas Czerner } 3967bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3968bfff6873SLukas Czerner return 0; 3969bfff6873SLukas Czerner } 3970bfff6873SLukas Czerner 3971bfff6873SLukas Czerner /* 3972bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3973bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3974bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3975bfff6873SLukas Czerner * groups and return total number of groups. 3976bfff6873SLukas Czerner */ 3977bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3978bfff6873SLukas Czerner { 3979bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3980bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3981bfff6873SLukas Czerner 39828844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39838844618dSTheodore Ts'o return ngroups; 39848844618dSTheodore Ts'o 3985bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3986bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3987bfff6873SLukas Czerner if (!gdp) 3988bfff6873SLukas Czerner continue; 3989bfff6873SLukas Czerner 399050122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3991bfff6873SLukas Czerner break; 3992bfff6873SLukas Czerner } 3993bfff6873SLukas Czerner 3994bfff6873SLukas Czerner return group; 3995bfff6873SLukas Czerner } 3996bfff6873SLukas Czerner 3997bfff6873SLukas Czerner static int ext4_li_info_new(void) 3998bfff6873SLukas Czerner { 3999bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 4000bfff6873SLukas Czerner 4001bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 4002bfff6873SLukas Czerner if (!eli) 4003bfff6873SLukas Czerner return -ENOMEM; 4004bfff6873SLukas Czerner 4005bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 4006bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 4007bfff6873SLukas Czerner 4008bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 4009bfff6873SLukas Czerner 4010bfff6873SLukas Czerner ext4_li_info = eli; 4011bfff6873SLukas Czerner 4012bfff6873SLukas Czerner return 0; 4013bfff6873SLukas Czerner } 4014bfff6873SLukas Czerner 4015bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 4016bfff6873SLukas Czerner ext4_group_t start) 4017bfff6873SLukas Czerner { 4018bfff6873SLukas Czerner struct ext4_li_request *elr; 4019bfff6873SLukas Czerner 4020bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 4021bfff6873SLukas Czerner if (!elr) 4022bfff6873SLukas Czerner return NULL; 4023bfff6873SLukas Czerner 4024bfff6873SLukas Czerner elr->lr_super = sb; 40253d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 402621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 40273d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 4028bfff6873SLukas Czerner elr->lr_next_group = start; 402921175ca4SHarshad Shirwadkar } else { 403021175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 40313d392b26STheodore Ts'o } 4032bfff6873SLukas Czerner 4033bfff6873SLukas Czerner /* 4034bfff6873SLukas Czerner * Randomize first schedule time of the request to 4035bfff6873SLukas Czerner * spread the inode table initialization requests 4036bfff6873SLukas Czerner * better. 4037bfff6873SLukas Czerner */ 4038dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 4039dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 4040bfff6873SLukas Czerner return elr; 4041bfff6873SLukas Czerner } 4042bfff6873SLukas Czerner 40437f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4044bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4045bfff6873SLukas Czerner { 4046bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 40477f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 404849598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 40496c5a6cb9SAndrew Morton int ret = 0; 4050bfff6873SLukas Czerner 40517f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 405251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 405351ce6511SLukas Czerner /* 405451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 405551ce6511SLukas Czerner * s_li_wait_mult might have changed. 405651ce6511SLukas Czerner */ 405751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40587f511862STheodore Ts'o goto out; 405951ce6511SLukas Czerner } 4060bfff6873SLukas Czerner 406121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 40623d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 40633d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 40647f511862STheodore Ts'o goto out; 4065bfff6873SLukas Czerner 4066bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40677f511862STheodore Ts'o if (!elr) { 40687f511862STheodore Ts'o ret = -ENOMEM; 40697f511862STheodore Ts'o goto out; 40707f511862STheodore Ts'o } 4071bfff6873SLukas Czerner 4072bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4073bfff6873SLukas Czerner ret = ext4_li_info_new(); 4074bfff6873SLukas Czerner if (ret) 4075bfff6873SLukas Czerner goto out; 4076bfff6873SLukas Czerner } 4077bfff6873SLukas Czerner 4078bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4079bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4080bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4081bfff6873SLukas Czerner 4082bfff6873SLukas Czerner sbi->s_li_request = elr; 408346e4690bSTao Ma /* 408446e4690bSTao Ma * set elr to NULL here since it has been inserted to 408546e4690bSTao Ma * the request_list and the removal and free of it is 408646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 408746e4690bSTao Ma */ 408846e4690bSTao Ma elr = NULL; 4089bfff6873SLukas Czerner 4090bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4091bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4092bfff6873SLukas Czerner if (ret) 4093bfff6873SLukas Czerner goto out; 4094bfff6873SLukas Czerner } 4095bfff6873SLukas Czerner out: 4096bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4097beed5ecbSNicolas Kaiser if (ret) 4098bfff6873SLukas Czerner kfree(elr); 4099bfff6873SLukas Czerner return ret; 4100bfff6873SLukas Czerner } 4101bfff6873SLukas Czerner 4102bfff6873SLukas Czerner /* 4103bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4104bfff6873SLukas Czerner * module unload. 4105bfff6873SLukas Czerner */ 4106bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4107bfff6873SLukas Czerner { 4108bfff6873SLukas Czerner /* 4109bfff6873SLukas Czerner * If thread exited earlier 4110bfff6873SLukas Czerner * there's nothing to be done. 4111bfff6873SLukas Czerner */ 41128f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4113bfff6873SLukas Czerner return; 4114bfff6873SLukas Czerner 41158f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4116bfff6873SLukas Czerner } 4117bfff6873SLukas Czerner 411825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 411925ed6e8aSDarrick J. Wong { 412025ed6e8aSDarrick J. Wong int ret = 1; 412125ed6e8aSDarrick J. Wong int compat, incompat; 412225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 412325ed6e8aSDarrick J. Wong 41249aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4125db9ee220SDarrick J. Wong /* journal checksum v3 */ 412625ed6e8aSDarrick J. Wong compat = 0; 4127db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 412825ed6e8aSDarrick J. Wong } else { 412925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 413025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 413125ed6e8aSDarrick J. Wong incompat = 0; 413225ed6e8aSDarrick J. Wong } 413325ed6e8aSDarrick J. Wong 4134feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4135feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4136feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4137feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 413825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 413925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 414025ed6e8aSDarrick J. Wong compat, 0, 414125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 414225ed6e8aSDarrick J. Wong incompat); 414325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 414425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 414525ed6e8aSDarrick J. Wong compat, 0, 414625ed6e8aSDarrick J. Wong incompat); 414725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 414825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 414925ed6e8aSDarrick J. Wong } else { 4150feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4151feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 415225ed6e8aSDarrick J. Wong } 415325ed6e8aSDarrick J. Wong 415425ed6e8aSDarrick J. Wong return ret; 415525ed6e8aSDarrick J. Wong } 415625ed6e8aSDarrick J. Wong 4157952fc18eSTheodore Ts'o /* 4158952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4159952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4160952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4161952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4162952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4163952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4164952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4165952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4166952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4167952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4168952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4169952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4170952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4171952fc18eSTheodore Ts'o */ 4172952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4173952fc18eSTheodore Ts'o char *buf) 4174952fc18eSTheodore Ts'o { 4175952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4176952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4177952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4178952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4179952fc18eSTheodore Ts'o int s, j, count = 0; 418010b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4181952fc18eSTheodore Ts'o 4182e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 418310b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 418410b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 41850548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41860548bbb8STheodore Ts'o 4187952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4188952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4189952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4190952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4191952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4192952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4193952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4194952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4195952fc18eSTheodore Ts'o count++; 4196952fc18eSTheodore Ts'o } 4197952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4198952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4199952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4200952fc18eSTheodore Ts'o count++; 4201952fc18eSTheodore Ts'o } 4202952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4203952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4204952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4205952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4206952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4207952fc18eSTheodore Ts'o count++; 4208952fc18eSTheodore Ts'o } 4209952fc18eSTheodore Ts'o if (i != grp) 4210952fc18eSTheodore Ts'o continue; 4211952fc18eSTheodore Ts'o s = 0; 4212952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4213952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4214952fc18eSTheodore Ts'o count++; 4215952fc18eSTheodore Ts'o } 4216c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4217c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4218c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4219c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4220c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4221952fc18eSTheodore Ts'o } 4222c48ae41bSTheodore Ts'o count += j; 4223c48ae41bSTheodore Ts'o for (; j > 0; j--) 4224c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4225952fc18eSTheodore Ts'o } 4226952fc18eSTheodore Ts'o if (!count) 4227952fc18eSTheodore Ts'o return 0; 4228952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4229952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4230952fc18eSTheodore Ts'o } 4231952fc18eSTheodore Ts'o 4232952fc18eSTheodore Ts'o /* 4233952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4234952fc18eSTheodore Ts'o */ 4235952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4236952fc18eSTheodore Ts'o { 4237952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4238952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 42393c816dedSEric Whitney struct inode *j_inode; 42403c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4241952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4242952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 42434fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4244952fc18eSTheodore Ts'o 4245952fc18eSTheodore Ts'o if (!buf) 4246952fc18eSTheodore Ts'o return -ENOMEM; 4247952fc18eSTheodore Ts'o 4248952fc18eSTheodore Ts'o /* 4249952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4250952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4251952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4252952fc18eSTheodore Ts'o */ 4253952fc18eSTheodore Ts'o 4254952fc18eSTheodore Ts'o /* 4255952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4256952fc18eSTheodore Ts'o */ 4257952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4258952fc18eSTheodore Ts'o 4259952fc18eSTheodore Ts'o /* 4260952fc18eSTheodore Ts'o * Add the overhead found in each block group 4261952fc18eSTheodore Ts'o */ 4262952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4263952fc18eSTheodore Ts'o int blks; 4264952fc18eSTheodore Ts'o 4265952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4266952fc18eSTheodore Ts'o overhead += blks; 4267952fc18eSTheodore Ts'o if (blks) 4268952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4269952fc18eSTheodore Ts'o cond_resched(); 4270952fc18eSTheodore Ts'o } 42713c816dedSEric Whitney 42723c816dedSEric Whitney /* 42733c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42743c816dedSEric Whitney * loaded or not 42753c816dedSEric Whitney */ 4276ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4277ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4278f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4279f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42803c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 42813c816dedSEric Whitney if (j_inode) { 42823c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42833c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42843c816dedSEric Whitney iput(j_inode); 42853c816dedSEric Whitney } else { 42863c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42873c816dedSEric Whitney } 42883c816dedSEric Whitney } 4289952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4290952fc18eSTheodore Ts'o smp_wmb(); 4291952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4292952fc18eSTheodore Ts'o return 0; 4293952fc18eSTheodore Ts'o } 4294952fc18eSTheodore Ts'o 4295b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 429627dd4385SLukas Czerner { 429727dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4298b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 429927dd4385SLukas Czerner 430027dd4385SLukas Czerner /* 430130fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 430230fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 430330fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 430430fac0f7SJan Kara * to keep ext2/3 backward compatibility. 430530fac0f7SJan Kara */ 4306e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4307b5799018STheodore Ts'o return; 430830fac0f7SJan Kara /* 430927dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 431027dd4385SLukas Czerner * This should cover the situations where we can not afford to run 431127dd4385SLukas Czerner * out of space like for example punch hole, or converting 4312556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 431327dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 431427dd4385SLukas Czerner * very rare. 431527dd4385SLukas Czerner */ 4316b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4317b5799018STheodore Ts'o sbi->s_cluster_bits); 431827dd4385SLukas Czerner 431927dd4385SLukas Czerner do_div(resv_clusters, 50); 432027dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 432127dd4385SLukas Czerner 4322b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 432327dd4385SLukas Czerner } 432427dd4385SLukas Czerner 4325ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4326ca9b404fSRoman Anufriev { 4327ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4328ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4329ca9b404fSRoman Anufriev return "none"; 4330ca9b404fSRoman Anufriev 4331ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4332ca9b404fSRoman Anufriev return "journalled"; 4333ca9b404fSRoman Anufriev else 4334ca9b404fSRoman Anufriev return "writeback"; 4335ca9b404fSRoman Anufriev #else 4336ca9b404fSRoman Anufriev return "disabled"; 4337ca9b404fSRoman Anufriev #endif 4338ca9b404fSRoman Anufriev } 4339ca9b404fSRoman Anufriev 4340188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4341188c299eSJan Kara enum ext4_journal_trigger_type type, 4342188c299eSJan Kara void (*trigger)( 4343188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4344188c299eSJan Kara struct buffer_head *bh, 4345188c299eSJan Kara void *mapped_data, 4346188c299eSJan Kara size_t size)) 4347188c299eSJan Kara { 4348188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4349188c299eSJan Kara 4350188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4351188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4352188c299eSJan Kara } 4353188c299eSJan Kara 43547edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4355ac27a0ecSDave Kleikamp { 43567edfd85bSLukas Czerner if (!sbi) 43577edfd85bSLukas Czerner return; 43587edfd85bSLukas Czerner 43597edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 43607edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43617edfd85bSLukas Czerner kfree(sbi); 43627edfd85bSLukas Czerner } 43637edfd85bSLukas Czerner 43647edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43657edfd85bSLukas Czerner { 43667edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43677edfd85bSLukas Czerner 43687edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43697edfd85bSLukas Czerner if (!sbi) 43707edfd85bSLukas Czerner return NULL; 43717edfd85bSLukas Czerner 43723acbdbf4SLinus Torvalds sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off); 43737edfd85bSLukas Czerner 43747edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43757edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43767edfd85bSLukas Czerner 43777edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43787edfd85bSLukas Czerner goto err_out; 43797edfd85bSLukas Czerner 43807edfd85bSLukas Czerner sb->s_fs_info = sbi; 43817edfd85bSLukas Czerner sbi->s_sb = sb; 43827edfd85bSLukas Czerner return sbi; 43837edfd85bSLukas Czerner err_out: 43847edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43857edfd85bSLukas Czerner kfree(sbi); 43867edfd85bSLukas Czerner return NULL; 43877edfd85bSLukas Czerner } 43887edfd85bSLukas Czerner 4389960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 43907edfd85bSLukas Czerner { 43911d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4392617ba13bSMingming Cao struct ext4_super_block *es = NULL; 43937edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 43947c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4395617ba13bSMingming Cao ext4_fsblk_t block; 439670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4397ac27a0ecSDave Kleikamp unsigned long offset = 0; 4398ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4399ac27a0ecSDave Kleikamp struct inode *root; 4400dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4401281b5995STheodore Ts'o int blocksize, clustersize; 44024ec11028STheodore Ts'o unsigned int db_count; 44034ec11028STheodore Ts'o unsigned int i; 4404ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4405bd81d8eeSLaurent Vivier __u64 blocks_count; 440607aa2ea1SLukas Czerner int err = 0; 4407bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 44087edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4409960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 4410b237e304SHarshad Shirwadkar 4411b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 44127edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4413ac27a0ecSDave Kleikamp 4414240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4415f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 44168446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4417ac27a0ecSDave Kleikamp 441807aa2ea1SLukas Czerner /* -EINVAL is default */ 4419dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4420617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4421ac27a0ecSDave Kleikamp if (!blocksize) { 4422b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4423ac27a0ecSDave Kleikamp goto out_fail; 4424ac27a0ecSDave Kleikamp } 4425ac27a0ecSDave Kleikamp 4426ac27a0ecSDave Kleikamp /* 4427617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4428ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4429ac27a0ecSDave Kleikamp */ 4430617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 44317edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 443270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4433ac27a0ecSDave Kleikamp } else { 44347edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4435ac27a0ecSDave Kleikamp } 4436ac27a0ecSDave Kleikamp 44378394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44388394a6abSzhangyi (F) if (IS_ERR(bh)) { 4439b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 44408394a6abSzhangyi (F) ret = PTR_ERR(bh); 4441ac27a0ecSDave Kleikamp goto out_fail; 4442ac27a0ecSDave Kleikamp } 4443ac27a0ecSDave Kleikamp /* 4444ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4445617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4446ac27a0ecSDave Kleikamp */ 44472716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4448ac27a0ecSDave Kleikamp sbi->s_es = es; 4449ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4450617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4451617ba13bSMingming Cao goto cantfind_ext4; 4452afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4453ac27a0ecSDave Kleikamp 4454feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4455e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4456e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4457363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4458feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4459feb0ab32SDarrick J. Wong 4460d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4461d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4462d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4463d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4464d25425f8SDarrick J. Wong silent = 1; 4465d25425f8SDarrick J. Wong goto cantfind_ext4; 4466d25425f8SDarrick J. Wong } 446702f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 446802f310fcSJan Kara ext4_orphan_file_block_trigger); 4469d25425f8SDarrick J. Wong 44700441984aSDarrick J. Wong /* Load the checksum driver */ 44710441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 44720441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 44730441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 44740441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 44750441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 44760441984aSDarrick J. Wong goto failed_mount; 44770441984aSDarrick J. Wong } 44780441984aSDarrick J. Wong 4479a9c47317SDarrick J. Wong /* Check superblock checksum */ 4480a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4481a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4482a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4483a9c47317SDarrick J. Wong silent = 1; 44846a797d27SDarrick J. Wong ret = -EFSBADCRC; 4485a9c47317SDarrick J. Wong goto cantfind_ext4; 4486a9c47317SDarrick J. Wong } 4487a9c47317SDarrick J. Wong 4488a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4489e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 44908c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4491dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4492a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4493a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4494a9c47317SDarrick J. Wong 4495ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4496ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4497fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4498617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4499fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 450087f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4501fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4502617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4503fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4504ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4505fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 450603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4507fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 45082e7842b8SHugh Dickins #endif 4509995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4510995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 451198c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 451298c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 451398c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 451498c1a759SDarrick J. Wong 4515617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4516fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4517617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4518fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4519617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4520fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4521ac27a0ecSDave Kleikamp 4522617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4523fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4524bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4525fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4526bb4f397aSAneesh Kumar K.V else 4527fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 452845f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4529fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 45308b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4531fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4532ac27a0ecSDave Kleikamp 453308cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 453408cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 453530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 453630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 453730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4538ac27a0ecSDave Kleikamp 45398b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4540fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4541ac27a0ecSDave Kleikamp 45421e2462f9SMingming Cao /* 4543dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4544dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4545dd919b98SAneesh Kumar K.V */ 4546bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 45478b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4548fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4549dd919b98SAneesh Kumar K.V 455051ce6511SLukas Czerner /* 455151ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 455251ce6511SLukas Czerner * no mount option specified. 455351ce6511SLukas Czerner */ 455451ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 455551ce6511SLukas Czerner 4556c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4557c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4558c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4559c9200760STheodore Ts'o "Invalid log block size: %u", 4560c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4561c9200760STheodore Ts'o goto failed_mount; 4562c9200760STheodore Ts'o } 4563c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4564c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4565c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4566c9200760STheodore Ts'o "Invalid log cluster size: %u", 4567c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4568c9200760STheodore Ts'o goto failed_mount; 4569c9200760STheodore Ts'o } 4570c9200760STheodore Ts'o 4571c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4572626b035bSRitesh Harjani 4573626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4574626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4575626b035bSRitesh Harjani 45769803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 45779803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 45789803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 45799803387cSTheodore Ts'o } else { 45809803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 45819803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 45829803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 45839803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 45849803387cSTheodore Ts'o sbi->s_first_ino); 45859803387cSTheodore Ts'o goto failed_mount; 45869803387cSTheodore Ts'o } 45879803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 45889803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 45899803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 45909803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45919803387cSTheodore Ts'o "unsupported inode size: %d", 45929803387cSTheodore Ts'o sbi->s_inode_size); 45934f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 45949803387cSTheodore Ts'o goto failed_mount; 45959803387cSTheodore Ts'o } 45969803387cSTheodore Ts'o /* 45979803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 45989803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 45999803387cSTheodore Ts'o * field should suffice to ensure we have extra space 46009803387cSTheodore Ts'o * for all three. 46019803387cSTheodore Ts'o */ 46029803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 46039803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 46049803387cSTheodore Ts'o sb->s_time_gran = 1; 46059803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 46069803387cSTheodore Ts'o } else { 46079803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 46089803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 46099803387cSTheodore Ts'o } 46109803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 46119803387cSTheodore Ts'o } 46129803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 46139803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 46149803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 46159803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 46169803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 46179803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 46189803387cSTheodore Ts'o 46199803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 46209803387cSTheodore Ts'o if (v > max) { 46219803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46229803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 46239803387cSTheodore Ts'o goto failed_mount; 46249803387cSTheodore Ts'o } 46259803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46269803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46279803387cSTheodore Ts'o 46289803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 46299803387cSTheodore Ts'o if (v > max) { 46309803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46319803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 46329803387cSTheodore Ts'o goto failed_mount; 46339803387cSTheodore Ts'o } 46349803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46359803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46369803387cSTheodore Ts'o } 46379803387cSTheodore Ts'o } 46389803387cSTheodore Ts'o 46397edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 46407edfd85bSLukas Czerner if (err < 0) 46415aee0f8aSTheodore Ts'o goto failed_mount; 46427edfd85bSLukas Czerner 46435a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 46447edfd85bSLukas Czerner 46457edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 46467edfd85bSLukas Czerner if (err < 0) 46477edfd85bSLukas Czerner goto failed_mount; 46487edfd85bSLukas Czerner 46497edfd85bSLukas Czerner err = ext4_apply_options(fc, sb); 46507edfd85bSLukas Czerner if (err < 0) 4651ac27a0ecSDave Kleikamp goto failed_mount; 4652ac27a0ecSDave Kleikamp 46535298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 4654f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4655c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4656c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4657aa8bf298SChristoph Hellwig __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 4658c83ad55eSGabriel Krisman Bertazi 4659aa8bf298SChristoph Hellwig encoding_info = ext4_sb_read_encoding(es); 4660aa8bf298SChristoph Hellwig if (!encoding_info) { 4661c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4662c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4663c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4664c83ad55eSGabriel Krisman Bertazi } 4665c83ad55eSGabriel Krisman Bertazi 4666c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4667c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4668c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 466949bd03ccSChristoph Hellwig "can't mount with superblock charset: %s-%u.%u.%u " 4670c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 467149bd03ccSChristoph Hellwig encoding_info->name, 467249bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 467349bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 467449bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 4675c83ad55eSGabriel Krisman Bertazi encoding_flags); 4676c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4677c83ad55eSGabriel Krisman Bertazi } 4678c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 467949bd03ccSChristoph Hellwig "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 468049bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 468149bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 468249bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 468349bd03ccSChristoph Hellwig encoding_flags); 4684c83ad55eSGabriel Krisman Bertazi 4685f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4686f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4687c83ad55eSGabriel Krisman Bertazi } 4688c83ad55eSGabriel Krisman Bertazi #endif 4689c83ad55eSGabriel Krisman Bertazi 469056889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4691556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4692781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4693244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4694556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 469556889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 469656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 469756889787STheodore Ts'o "both data=journal and delalloc"); 469856889787STheodore Ts'o goto failed_mount; 469956889787STheodore Ts'o } 4700fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4701923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4702923ae0ffSRoss Zwisler "both data=journal and dax"); 4703923ae0ffSRoss Zwisler goto failed_mount; 4704923ae0ffSRoss Zwisler } 470573b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 470673b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 470773b92a2aSSergey Karamov "encrypted files will use data=ordered " 470873b92a2aSSergey Karamov "instead of data journaling mode"); 470973b92a2aSSergey Karamov } 471056889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 471156889787STheodore Ts'o clear_opt(sb, DELALLOC); 4712001e4a87STejun Heo } else { 4713001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 471456889787STheodore Ts'o } 471556889787STheodore Ts'o 47161751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 47171751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4718ac27a0ecSDave Kleikamp 4719617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4720e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4721e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4722e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4723b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4724b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4725b31e1552SEric Sandeen "running e2fsck is recommended"); 4726469108ffSTheodore Tso 4727ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4728ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4729e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4730ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4731ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4732ed3654ebSTheodore Ts'o goto failed_mount; 4733ed3654ebSTheodore Ts'o } 4734dec214d0STahsin Erdogan 4735dec214d0STahsin Erdogan /* 4736dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4737dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4738dec214d0STahsin Erdogan */ 4739dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4740dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4741dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4742dec214d0STahsin Erdogan goto failed_mount; 4743dec214d0STahsin Erdogan } 4744ed3654ebSTheodore Ts'o } 4745ed3654ebSTheodore Ts'o 47462035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 47472035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 47482035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 47492035e776STheodore Ts'o "using the ext4 subsystem"); 47502035e776STheodore Ts'o else { 47510d9366d6SEric Sandeen /* 47520d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47530d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 47540d9366d6SEric Sandeen */ 47550d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47560d9366d6SEric Sandeen goto failed_mount; 47572035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 47582035e776STheodore Ts'o "to feature incompatibilities"); 47592035e776STheodore Ts'o goto failed_mount; 47602035e776STheodore Ts'o } 47612035e776STheodore Ts'o } 47622035e776STheodore Ts'o 47632035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 47642035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 47652035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 47662035e776STheodore Ts'o "using the ext4 subsystem"); 47672035e776STheodore Ts'o else { 47680d9366d6SEric Sandeen /* 47690d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47700d9366d6SEric Sandeen * it's actually an ext4 filesystem. 47710d9366d6SEric Sandeen */ 47720d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47730d9366d6SEric Sandeen goto failed_mount; 47742035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 47752035e776STheodore Ts'o "to feature incompatibilities"); 47762035e776STheodore Ts'o goto failed_mount; 47772035e776STheodore Ts'o } 47782035e776STheodore Ts'o } 47792035e776STheodore Ts'o 4780469108ffSTheodore Tso /* 4781ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4782ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4783ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4784ac27a0ecSDave Kleikamp */ 4785bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4786ac27a0ecSDave Kleikamp goto failed_mount; 4787a13fb1a4SEric Sandeen 47885b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 47895b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 47905b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 47915b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 47925b9554dcSTheodore Ts'o goto failed_mount; 47935b9554dcSTheodore Ts'o } 47945b9554dcSTheodore Ts'o 479589b93a7bSChristoph Hellwig if (sbi->s_daxdev) { 47967b0800d0SChristoph Hellwig if (blocksize == PAGE_SIZE) 4797a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 47987b0800d0SChristoph Hellwig else 47997b0800d0SChristoph Hellwig ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 48007b0800d0SChristoph Hellwig } 4801a8ab6d38SIra Weiny 4802fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4803559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4804559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4805559db4c6SRoss Zwisler " that may contain inline data"); 4806361d24d4SEric Sandeen goto failed_mount; 4807559db4c6SRoss Zwisler } 4808a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 480924f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4810361d24d4SEric Sandeen "DAX unsupported by block device."); 4811361d24d4SEric Sandeen goto failed_mount; 481224f3478dSDan Williams } 4813923ae0ffSRoss Zwisler } 4814923ae0ffSRoss Zwisler 4815e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 48166ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 48176ddb2447STheodore Ts'o es->s_encryption_level); 48186ddb2447STheodore Ts'o goto failed_mount; 48196ddb2447STheodore Ts'o } 48206ddb2447STheodore Ts'o 4821ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4822afd09b61SAlexey Makhalov /* 4823afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4824afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4825afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4826afd09b61SAlexey Makhalov */ 4827afd09b61SAlexey Makhalov brelse(bh); 4828ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4829ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4830b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4831ce40733cSAneesh Kumar K.V blocksize); 4832afd09b61SAlexey Makhalov bh = NULL; 4833ac27a0ecSDave Kleikamp goto failed_mount; 4834ac27a0ecSDave Kleikamp } 4835ac27a0ecSDave Kleikamp 48367edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 483770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 48388394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 48398394a6abSzhangyi (F) if (IS_ERR(bh)) { 4840b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4841b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 48428394a6abSzhangyi (F) ret = PTR_ERR(bh); 48438394a6abSzhangyi (F) bh = NULL; 4844ac27a0ecSDave Kleikamp goto failed_mount; 4845ac27a0ecSDave Kleikamp } 48462716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4847ac27a0ecSDave Kleikamp sbi->s_es = es; 4848617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4850b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4851ac27a0ecSDave Kleikamp goto failed_mount; 4852ac27a0ecSDave Kleikamp } 4853ac27a0ecSDave Kleikamp } 4854ac27a0ecSDave Kleikamp 4855e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4856f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4857f287a1a5STheodore Ts'o has_huge_files); 4858f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4859ac27a0ecSDave Kleikamp 48600d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4861e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 48628fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 48630d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4864d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4866b31e1552SEric Sandeen "unsupported descriptor size %lu", 48670d1ee42fSAlexandre Ratchov sbi->s_desc_size); 48680d1ee42fSAlexandre Ratchov goto failed_mount; 48690d1ee42fSAlexandre Ratchov } 48700d1ee42fSAlexandre Ratchov } else 48710d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 48720b8e58a1SAndreas Dilger 4873ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4874ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 48750b8e58a1SAndreas Dilger 4876617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4877ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4878617ba13bSMingming Cao goto cantfind_ext4; 4879cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4880cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4881cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4882b9c538daSJosh Triplett sbi->s_inodes_per_group); 4883cd6bb35bSTheodore Ts'o goto failed_mount; 4884cd6bb35bSTheodore Ts'o } 4885ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4886ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 48870d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4888ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4889ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4890e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4891e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 48920b8e58a1SAndreas Dilger 4893ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4894ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4895ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4896e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4897f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4898f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4899f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4900f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4901f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4902bc98a42cSDavid Howells if (!sb_rdonly(sb)) 490323301410STheodore Ts'o es->s_flags |= 490423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4905f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4906f99b2589STheodore Ts'o #else 4907bc98a42cSDavid Howells if (!sb_rdonly(sb)) 490823301410STheodore Ts'o es->s_flags |= 490923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4910f99b2589STheodore Ts'o #endif 4911f99b2589STheodore Ts'o } 491223301410STheodore Ts'o } 4913ac27a0ecSDave Kleikamp 4914281b5995STheodore Ts'o /* Handle clustersize */ 4915281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4916ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4917281b5995STheodore Ts'o if (clustersize < blocksize) { 4918281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4919281b5995STheodore Ts'o "cluster size (%d) smaller than " 4920281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4921281b5995STheodore Ts'o goto failed_mount; 4922281b5995STheodore Ts'o } 4923281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4924281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4925281b5995STheodore Ts'o sbi->s_clusters_per_group = 4926281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4927281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4928281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4929281b5995STheodore Ts'o "#clusters per group too big: %lu", 4930281b5995STheodore Ts'o sbi->s_clusters_per_group); 4931281b5995STheodore Ts'o goto failed_mount; 4932281b5995STheodore Ts'o } 4933281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4934281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4935281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4936281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4937281b5995STheodore Ts'o sbi->s_blocks_per_group, 4938281b5995STheodore Ts'o sbi->s_clusters_per_group); 4939281b5995STheodore Ts'o goto failed_mount; 4940281b5995STheodore Ts'o } 4941281b5995STheodore Ts'o } else { 4942281b5995STheodore Ts'o if (clustersize != blocksize) { 4943bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4944bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4945bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4946bfe0a5f4STheodore Ts'o goto failed_mount; 4947281b5995STheodore Ts'o } 4948ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4949b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4950b31e1552SEric Sandeen "#blocks per group too big: %lu", 4951ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4952ac27a0ecSDave Kleikamp goto failed_mount; 4953ac27a0ecSDave Kleikamp } 4954281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4955281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4956281b5995STheodore Ts'o } 4957281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4958281b5995STheodore Ts'o 4959960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4960960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4961960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4962960fd856STheodore Ts'o 4963bf43d84bSEric Sandeen /* 4964bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4965bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4966bf43d84bSEric Sandeen */ 49675a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 496830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 49695a9ae68aSDarrick J. Wong if (err) { 4970b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4971bf43d84bSEric Sandeen " too large to mount safely on this system"); 4972ac27a0ecSDave Kleikamp goto failed_mount; 4973ac27a0ecSDave Kleikamp } 4974ac27a0ecSDave Kleikamp 4975617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4976617ba13bSMingming Cao goto cantfind_ext4; 4977e7c95593SEric Sandeen 49780f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 49795513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 49800f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4981b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4982b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 49830f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 49840f2ddca6SFrom: Thiemo Nagel goto failed_mount; 49850f2ddca6SFrom: Thiemo Nagel } 49860f2ddca6SFrom: Thiemo Nagel 49874ec11028STheodore Ts'o /* 49884ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 49894ec11028STheodore Ts'o * of the filesystem. 49904ec11028STheodore Ts'o */ 49914ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4992b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4993b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4994e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 49954ec11028STheodore Ts'o ext4_blocks_count(es)); 4996e7c95593SEric Sandeen goto failed_mount; 4997e7c95593SEric Sandeen } 4998bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4999bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 5000bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 5001bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 5002bfe0a5f4STheodore Ts'o goto failed_mount; 5003bfe0a5f4STheodore Ts'o } 5004bfe0a5f4STheodore Ts'o 5005bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 5006bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 5007bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 5008bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 50094ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 5010df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 50114ec11028STheodore Ts'o "(block count %llu, first data block %u, " 5012df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 50134ec11028STheodore Ts'o ext4_blocks_count(es), 50144ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 50154ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 50164ec11028STheodore Ts'o goto failed_mount; 50174ec11028STheodore Ts'o } 5018bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 5019fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 5020fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 50219e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 50229e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 50239e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 50249e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 50259e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 50269e463084STheodore Ts'o ret = -EINVAL; 50279e463084STheodore Ts'o goto failed_mount; 50289e463084STheodore Ts'o } 5029617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 5030617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 50313a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 50322ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 50333a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 50343a4b77cdSEryu Guan "first meta block group too large: %u " 50353a4b77cdSEryu Guan "(group descriptor block count %u)", 50363a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 50373a4b77cdSEryu Guan goto failed_mount; 50383a4b77cdSEryu Guan } 50393a4b77cdSEryu Guan } 50401d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 50411d0c3924STheodore Ts'o kvmalloc_array(db_count, 5042f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 50431d0c3924STheodore Ts'o GFP_KERNEL)); 5044ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 5045b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 50462cde417dSTheodore Ts'o ret = -ENOMEM; 5047ac27a0ecSDave Kleikamp goto failed_mount; 5048ac27a0ecSDave Kleikamp } 5049ac27a0ecSDave Kleikamp 5050705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 5051ac27a0ecSDave Kleikamp 505285c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 505385c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 505485c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 50555df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 505685c8f176SAndrew Perepechko } 505785c8f176SAndrew Perepechko 5058ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 50591d0c3924STheodore Ts'o struct buffer_head *bh; 50601d0c3924STheodore Ts'o 506170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 50628394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 50638394a6abSzhangyi (F) if (IS_ERR(bh)) { 5064b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5065b31e1552SEric Sandeen "can't read group descriptor %d", i); 5066ac27a0ecSDave Kleikamp db_count = i; 50678394a6abSzhangyi (F) ret = PTR_ERR(bh); 5068ac27a0ecSDave Kleikamp goto failed_mount2; 5069ac27a0ecSDave Kleikamp } 50701d0c3924STheodore Ts'o rcu_read_lock(); 50711d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 50721d0c3924STheodore Ts'o rcu_read_unlock(); 5073ac27a0ecSDave Kleikamp } 507444de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 5075829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 5076b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 50776a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 5078f9ae9cf5STheodore Ts'o goto failed_mount2; 5079ac27a0ecSDave Kleikamp } 5080772cb7c8SJose R. Santos 5081235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5082c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5083c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 508404496411STao Ma 5085a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5086eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5087ce7e010aSTheodore Ts'o goto failed_mount3; 5088ce7e010aSTheodore Ts'o 5089c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 509067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5091c9de560dSAlex Tomas 5092f9ae9cf5STheodore Ts'o /* 5093f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5094f9ae9cf5STheodore Ts'o */ 5095f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5096617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5097617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5098643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5099a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5100ffcc4182SEric Biggers #endif 5101c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5102c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5103c93d8f88SEric Biggers #endif 5104ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5105617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5106e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 51071fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5108262b4662SJan Kara else 5109262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5110689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5111ac27a0ecSDave Kleikamp #endif 511285787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5113f2fa2ffcSAneesh Kumar K.V 5114ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 51153b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5116ac27a0ecSDave Kleikamp 5117aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5118aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5119aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5120aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5121aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5122aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5123aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 51249b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 5125e85c81baSXin Yin sbi->s_fc_ineligible_tid = 0; 5126aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5127aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 51288016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 51298016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 51308016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 51318016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 51328016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 51338016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 51348016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5135aa75f4d3SHarshad Shirwadkar 5136ac27a0ecSDave Kleikamp sb->s_root = NULL; 5137ac27a0ecSDave Kleikamp 5138ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 513902f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5140e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5141ac27a0ecSDave Kleikamp 5142bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5143c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 514450460fe8SDarrick J. Wong goto failed_mount3a; 5145c5e06d10SJohann Lombardi 5146ac27a0ecSDave Kleikamp /* 5147ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5148ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5149ac27a0ecSDave Kleikamp */ 5150e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 51517edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 51524753d8a2STheodore Ts'o if (err) 515350460fe8SDarrick J. Wong goto failed_mount3a; 5154bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5155e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5156b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5157b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5158744692dcSJiaying Zhang goto failed_mount_wq; 5159ac27a0ecSDave Kleikamp } else { 51601e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 51611e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 51621e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51631e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 51641e381f60SDmitry Monakhov goto failed_mount_wq; 51651e381f60SDmitry Monakhov } 51661e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 51671e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51681e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 51691e381f60SDmitry Monakhov goto failed_mount_wq; 51701e381f60SDmitry Monakhov } 51711e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 51721e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51731e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 51741e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 51751e381f60SDmitry Monakhov goto failed_mount_wq; 51761e381f60SDmitry Monakhov } 51771e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 51781e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 51791e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51801e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 51811e381f60SDmitry Monakhov goto failed_mount_wq; 51821e381f60SDmitry Monakhov } 518350b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 51841e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5185fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5186995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 51870390131bSFrank Mayhar sbi->s_journal = NULL; 51880390131bSFrank Mayhar needs_recovery = 0; 51890390131bSFrank Mayhar goto no_journal; 5190ac27a0ecSDave Kleikamp } 5191ac27a0ecSDave Kleikamp 5192e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5193eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5194eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5195b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5196744692dcSJiaying Zhang goto failed_mount_wq; 5197eb40a09cSJose R. Santos } 5198eb40a09cSJose R. Santos 519925ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 520025ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 520125ed6e8aSDarrick J. Wong "feature set"); 520225ed6e8aSDarrick J. Wong goto failed_mount_wq; 5203d4da6c9cSLinus Torvalds } 5204818d276cSGirish Shilamkar 5205a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5206a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5207a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5208a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5209a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5210a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5211a1e5e465SHarshad Shirwadkar } 5212a1e5e465SHarshad Shirwadkar 5213ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5214ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5215ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5216ac27a0ecSDave Kleikamp case 0: 5217ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 521863f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 521963f57933SAndrew Morton * cope, else JOURNAL_DATA 522063f57933SAndrew Morton */ 5221dab291afSMingming Cao if (jbd2_journal_check_available_features 522227f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5223fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 522427f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 522527f394a7STyson Nottingham } else { 5226fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 522727f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 522827f394a7STyson Nottingham } 5229ac27a0ecSDave Kleikamp break; 5230ac27a0ecSDave Kleikamp 5231617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5232617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5233dab291afSMingming Cao if (!jbd2_journal_check_available_features 5234dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5235b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5236b31e1552SEric Sandeen "requested data journaling mode"); 5237744692dcSJiaying Zhang goto failed_mount_wq; 5238ac27a0ecSDave Kleikamp } 52395a150bdeSGustavo A. R. Silva break; 5240ac27a0ecSDave Kleikamp default: 5241ac27a0ecSDave Kleikamp break; 5242ac27a0ecSDave Kleikamp } 5243ab04df78SJan Kara 5244ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5245ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5246ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5247ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5248ab04df78SJan Kara goto failed_mount_wq; 5249ab04df78SJan Kara } 5250ab04df78SJan Kara 52517edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5252ac27a0ecSDave Kleikamp 5253342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5254afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5255342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5256afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 525718aadd47SBobi Jam 5258ce7e010aSTheodore Ts'o no_journal: 5259cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 526047387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 526147387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5262cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5263cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 52649c191f70ST Makphaibulchoke goto failed_mount_wq; 52659c191f70ST Makphaibulchoke } 52669c191f70ST Makphaibulchoke 5267dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5268dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5269dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5270dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5271dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5272dec214d0STahsin Erdogan goto failed_mount_wq; 5273dec214d0STahsin Erdogan } 5274dec214d0STahsin Erdogan } 5275cdb7ee4cSTahsin Erdogan } 5276dec214d0STahsin Erdogan 5277c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5278c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5279c93d8f88SEric Biggers goto failed_mount_wq; 5280c93d8f88SEric Biggers } 5281c93d8f88SEric Biggers 5282bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5283e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5284e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 52854392fbc4SJan Kara ext4_commit_super(sb); 52866ddb2447STheodore Ts'o } 52876ddb2447STheodore Ts'o 5288fd89d5f2STejun Heo /* 5289952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5290952fc18eSTheodore Ts'o * superblock if present. 5291952fc18eSTheodore Ts'o */ 5292952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5293*85d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 5294*85d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 5295*85d825dbSTheodore Ts'o sbi->s_overhead = 0; 5296*85d825dbSTheodore Ts'o /* 5297*85d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 5298*85d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 5299*85d825dbSTheodore Ts'o * it to make sure we are using the correct value. 5300*85d825dbSTheodore Ts'o */ 5301*85d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 5302*85d825dbSTheodore Ts'o sbi->s_overhead = 0; 5303*85d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 530407aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 530507aa2ea1SLukas Czerner if (err) 5306952fc18eSTheodore Ts'o goto failed_mount_wq; 5307952fc18eSTheodore Ts'o } 5308952fc18eSTheodore Ts'o 5309952fc18eSTheodore Ts'o /* 5310fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5311fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5312fd89d5f2STejun Heo */ 53132e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 53142e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 53152e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 53162e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 531707aa2ea1SLukas Czerner ret = -ENOMEM; 53182e8fa54eSJan Kara goto failed_mount4; 53192e8fa54eSJan Kara } 53202e8fa54eSJan Kara 5321ac27a0ecSDave Kleikamp /* 5322dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5323ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5324ac27a0ecSDave Kleikamp */ 5325ac27a0ecSDave Kleikamp 53268a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 53271d1fe1eeSDavid Howells if (IS_ERR(root)) { 5328b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 53291d1fe1eeSDavid Howells ret = PTR_ERR(root); 533032a9bb57SManish Katiyar root = NULL; 5331ac27a0ecSDave Kleikamp goto failed_mount4; 5332ac27a0ecSDave Kleikamp } 5333ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5334b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 533594bf608aSAl Viro iput(root); 5336ac27a0ecSDave Kleikamp goto failed_mount4; 5337ac27a0ecSDave Kleikamp } 5338b886ee3eSGabriel Krisman Bertazi 533948fde701SAl Viro sb->s_root = d_make_root(root); 53401d1fe1eeSDavid Howells if (!sb->s_root) { 5341b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 53421d1fe1eeSDavid Howells ret = -ENOMEM; 53431d1fe1eeSDavid Howells goto failed_mount4; 53441d1fe1eeSDavid Howells } 5345ac27a0ecSDave Kleikamp 5346c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5347c89128a0SJaegeuk Kim if (ret == -EROFS) { 53481751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5349c89128a0SJaegeuk Kim ret = 0; 5350c89128a0SJaegeuk Kim } else if (ret) 5351c89128a0SJaegeuk Kim goto failed_mount4a; 5352ef7f3835SKalpak Shah 5353b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 535427dd4385SLukas Czerner 53550f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 53566fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 53576fd058f7STheodore Ts'o if (err) { 5358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5359fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5360f9ae9cf5STheodore Ts'o goto failed_mount4a; 5361f9ae9cf5STheodore Ts'o } 53620f5bde1dSJan Kara } 53638016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5364f9ae9cf5STheodore Ts'o 5365f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5366196e402aSHarshad Shirwadkar 5367196e402aSHarshad Shirwadkar /* 5368196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5369196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5370196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5371196e402aSHarshad Shirwadkar */ 537227b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 537327b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5374196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 537527b38686SOjaswin Mujoo else 5376196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 537727b38686SOjaswin Mujoo } 5378196e402aSHarshad Shirwadkar 5379f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5380f9ae9cf5STheodore Ts'o if (err) { 5381f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5382f9ae9cf5STheodore Ts'o err); 5383dcf2d804STao Ma goto failed_mount5; 5384c2774d84SAneesh Kumar K.V } 5385c2774d84SAneesh Kumar K.V 5386027f14f5STheodore Ts'o /* 5387027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5388027f14f5STheodore Ts'o * mballoc is initialized 5389027f14f5STheodore Ts'o */ 5390027f14f5STheodore Ts'o if (sbi->s_journal) 5391027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5392027f14f5STheodore Ts'o ext4_journal_commit_callback; 5393027f14f5STheodore Ts'o 5394d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5395d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5396d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5397908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5398908c7f19STejun Heo GFP_KERNEL); 5399d5e03cbbSTheodore Ts'o if (!err) { 5400d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5401d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5402908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5403908c7f19STejun Heo GFP_KERNEL); 5404d5e03cbbSTheodore Ts'o } 5405b2bbb92fSJan Kara /* 5406b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5407b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5408b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5409b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5410b2bbb92fSJan Kara * after it is mounted can fail. 5411b2bbb92fSJan Kara */ 5412b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5413d5e03cbbSTheodore Ts'o if (!err) 5414d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5415908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5416d5e03cbbSTheodore Ts'o if (!err) 5417908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5418908c7f19STejun Heo GFP_KERNEL); 5419c8585c6fSDaeho Jeong if (!err) 5420efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5421efc61345SEric Whitney GFP_KERNEL); 5422efc61345SEric Whitney if (!err) 5423bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5424c8585c6fSDaeho Jeong 5425d5e03cbbSTheodore Ts'o if (err) { 5426d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5427d5e03cbbSTheodore Ts'o goto failed_mount6; 5428d5e03cbbSTheodore Ts'o } 5429d5e03cbbSTheodore Ts'o 5430e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5431d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5432d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5433d5e03cbbSTheodore Ts'o "unable to initialize " 5434d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54358f6840c4SYang Yingliang ret = -ENOMEM; 5436d5e03cbbSTheodore Ts'o goto failed_mount6; 5437d5e03cbbSTheodore Ts'o } 5438d5e03cbbSTheodore Ts'o 5439bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5440bfff6873SLukas Czerner if (err) 5441dcf2d804STao Ma goto failed_mount6; 5442bfff6873SLukas Czerner 5443b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5444dcf2d804STao Ma if (err) 5445dcf2d804STao Ma goto failed_mount7; 54463197ebdbSTheodore Ts'o 544702f310fcSJan Kara err = ext4_init_orphan_info(sb); 544802f310fcSJan Kara if (err) 544902f310fcSJan Kara goto failed_mount8; 54509b2ff357SJan Kara #ifdef CONFIG_QUOTA 54519b2ff357SJan Kara /* Enable quota usage during mount. */ 5452bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 54539b2ff357SJan Kara err = ext4_enable_quotas(sb); 54549b2ff357SJan Kara if (err) 545502f310fcSJan Kara goto failed_mount9; 54569b2ff357SJan Kara } 54579b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 54589b2ff357SJan Kara 5459bc71726cSzhangyi (F) /* 5460bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5461bc71726cSzhangyi (F) * used to detect the metadata async write error. 5462bc71726cSzhangyi (F) */ 5463bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5464bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5465bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5466bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5467617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5468617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5469617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 54700390131bSFrank Mayhar if (needs_recovery) { 5471b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 547211215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 547311215630SJan Kara if (err) 547402f310fcSJan Kara goto failed_mount9; 54750390131bSFrank Mayhar } 54760390131bSFrank Mayhar 547779add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 547879add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 547979add3a3SLukas Czerner if (!blk_queue_discard(q)) 548079add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 548179add3a3SLukas Czerner "mounting with \"discard\" option, but " 548279add3a3SLukas Czerner "the device does not support discard"); 548379add3a3SLukas Czerner } 548479add3a3SLukas Czerner 548566e61a9eSTheodore Ts'o if (es->s_error_count) 548666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5487ac27a0ecSDave Kleikamp 5488efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5489efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5490efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5491efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 54921cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 54931cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5494efbed4dcSTheodore Ts'o 5495ac27a0ecSDave Kleikamp return 0; 5496ac27a0ecSDave Kleikamp 5497617ba13bSMingming Cao cantfind_ext4: 5498ac27a0ecSDave Kleikamp if (!silent) 5499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5500ac27a0ecSDave Kleikamp goto failed_mount; 5501ac27a0ecSDave Kleikamp 550202f310fcSJan Kara failed_mount9: 550302f310fcSJan Kara ext4_release_orphan_info(sb); 550472ba7450STheodore Ts'o failed_mount8: 5505ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5506cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5507dcf2d804STao Ma failed_mount7: 5508dcf2d804STao Ma ext4_unregister_li_request(sb); 5509dcf2d804STao Ma failed_mount6: 5510f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 55117c990728SSuraj Jitindar Singh rcu_read_lock(); 55127c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 55137c990728SSuraj Jitindar Singh if (flex_groups) { 55147c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 55157c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 55167c990728SSuraj Jitindar Singh kvfree(flex_groups); 55177c990728SSuraj Jitindar Singh } 55187c990728SSuraj Jitindar Singh rcu_read_unlock(); 5519d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5520d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5521d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5522d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5523efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5524bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 552500764937SAzat Khuzhin failed_mount5: 5526f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5527f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5528f9ae9cf5STheodore Ts'o failed_mount4a: 552994bf608aSAl Viro dput(sb->s_root); 553032a9bb57SManish Katiyar sb->s_root = NULL; 553194bf608aSAl Viro failed_mount4: 5532b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55332e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55342e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55354c0425ffSMingming Cao failed_mount_wq: 5536dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5537dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 553850c15df6SChengguang Xu 553947387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 554047387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 554150c15df6SChengguang Xu 55420390131bSFrank Mayhar if (sbi->s_journal) { 5543bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5544bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5545dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 554647b4a50bSJan Kara sbi->s_journal = NULL; 55470390131bSFrank Mayhar } 554850460fe8SDarrick J. Wong failed_mount3a: 5549d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5550eb68d0e2SZheng Liu failed_mount3: 5551bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5552c92dc856SJan Kara flush_work(&sbi->s_error_work); 55532a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5554618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5555ac27a0ecSDave Kleikamp failed_mount2: 55561d0c3924STheodore Ts'o rcu_read_lock(); 55571d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5558ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 55591d0c3924STheodore Ts'o brelse(group_desc[i]); 55601d0c3924STheodore Ts'o kvfree(group_desc); 55611d0c3924STheodore Ts'o rcu_read_unlock(); 5562ac27a0ecSDave Kleikamp failed_mount: 55630441984aSDarrick J. Wong if (sbi->s_chksum_driver) 55640441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5565c83ad55eSGabriel Krisman Bertazi 55665298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5567f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5568c83ad55eSGabriel Krisman Bertazi #endif 5569c83ad55eSGabriel Krisman Bertazi 5570ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5571a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 55720ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5573ac27a0ecSDave Kleikamp #endif 5574ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5575afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5576ac27a0ecSDave Kleikamp brelse(bh); 5577afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5578ac27a0ecSDave Kleikamp out_fail: 5579ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 558007aa2ea1SLukas Czerner return err ? err : ret; 5581ac27a0ecSDave Kleikamp } 5582ac27a0ecSDave Kleikamp 5583cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 55847edfd85bSLukas Czerner { 5585cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 55867edfd85bSLukas Czerner struct ext4_sb_info *sbi; 55877edfd85bSLukas Czerner const char *descr; 5588cebe85d5SLukas Czerner int ret; 55897edfd85bSLukas Czerner 5590cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5591cebe85d5SLukas Czerner if (!sbi) 55927c268d4cSLukas Czerner return -ENOMEM; 5593cebe85d5SLukas Czerner 5594cebe85d5SLukas Czerner fc->s_fs_info = sbi; 55957edfd85bSLukas Czerner 55967edfd85bSLukas Czerner /* Cleanup superblock name */ 55977edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 55987edfd85bSLukas Czerner 55997edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5600cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5601cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 56027edfd85bSLukas Czerner 5603960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 56047edfd85bSLukas Czerner if (ret < 0) 56057edfd85bSLukas Czerner goto free_sbi; 56067edfd85bSLukas Czerner 5607cebe85d5SLukas Czerner if (sbi->s_journal) { 56087edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56097edfd85bSLukas Czerner descr = " journalled data mode"; 56107edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56117edfd85bSLukas Czerner descr = " ordered data mode"; 56127edfd85bSLukas Czerner else 56137edfd85bSLukas Czerner descr = " writeback data mode"; 56147edfd85bSLukas Czerner } else 56157edfd85bSLukas Czerner descr = "out journal"; 56167edfd85bSLukas Czerner 56177edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 56187edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5619cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 56207edfd85bSLukas Czerner 56217edfd85bSLukas Czerner return 0; 5622cebe85d5SLukas Czerner 56237edfd85bSLukas Czerner free_sbi: 56247edfd85bSLukas Czerner ext4_free_sbi(sbi); 5625cebe85d5SLukas Czerner fc->s_fs_info = NULL; 56267edfd85bSLukas Czerner return ret; 56277edfd85bSLukas Czerner } 56287edfd85bSLukas Czerner 5629cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5630cebe85d5SLukas Czerner { 5631cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5632cebe85d5SLukas Czerner } 5633cebe85d5SLukas Czerner 5634ac27a0ecSDave Kleikamp /* 5635ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5636ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5637ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5638ac27a0ecSDave Kleikamp */ 5639617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5640ac27a0ecSDave Kleikamp { 5641617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5642ac27a0ecSDave Kleikamp 5643ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 564430773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 564530773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 56466866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5647ac27a0ecSDave Kleikamp 5648a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5649ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5650dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5651ac27a0ecSDave Kleikamp else 5652dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 56535bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 56545bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 56555bf5683aSHidehiro Kawai else 56565bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5657a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5658ac27a0ecSDave Kleikamp } 5659ac27a0ecSDave Kleikamp 5660c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5661ac27a0ecSDave Kleikamp unsigned int journal_inum) 5662ac27a0ecSDave Kleikamp { 5663ac27a0ecSDave Kleikamp struct inode *journal_inode; 5664ac27a0ecSDave Kleikamp 5665c6cb7e77SEric Whitney /* 5666c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5667c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5668c6cb7e77SEric Whitney * will try to delete it. 5669c6cb7e77SEric Whitney */ 56708a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 56711d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5673ac27a0ecSDave Kleikamp return NULL; 5674ac27a0ecSDave Kleikamp } 5675ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5676ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5677ac27a0ecSDave Kleikamp iput(journal_inode); 5678b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5679ac27a0ecSDave Kleikamp return NULL; 5680ac27a0ecSDave Kleikamp } 5681ac27a0ecSDave Kleikamp 5682e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5683ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 56841d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5685b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5686ac27a0ecSDave Kleikamp iput(journal_inode); 5687ac27a0ecSDave Kleikamp return NULL; 5688ac27a0ecSDave Kleikamp } 5689c6cb7e77SEric Whitney return journal_inode; 5690c6cb7e77SEric Whitney } 5691c6cb7e77SEric Whitney 5692c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5693c6cb7e77SEric Whitney unsigned int journal_inum) 5694c6cb7e77SEric Whitney { 5695c6cb7e77SEric Whitney struct inode *journal_inode; 5696c6cb7e77SEric Whitney journal_t *journal; 5697c6cb7e77SEric Whitney 569811215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 569911215630SJan Kara return NULL; 5700c6cb7e77SEric Whitney 5701c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5702c6cb7e77SEric Whitney if (!journal_inode) 5703c6cb7e77SEric Whitney return NULL; 5704ac27a0ecSDave Kleikamp 5705dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5706ac27a0ecSDave Kleikamp if (!journal) { 5707b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5708ac27a0ecSDave Kleikamp iput(journal_inode); 5709ac27a0ecSDave Kleikamp return NULL; 5710ac27a0ecSDave Kleikamp } 5711ac27a0ecSDave Kleikamp journal->j_private = sb; 5712617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5713ac27a0ecSDave Kleikamp return journal; 5714ac27a0ecSDave Kleikamp } 5715ac27a0ecSDave Kleikamp 5716617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5717ac27a0ecSDave Kleikamp dev_t j_dev) 5718ac27a0ecSDave Kleikamp { 5719ac27a0ecSDave Kleikamp struct buffer_head *bh; 5720ac27a0ecSDave Kleikamp journal_t *journal; 5721617ba13bSMingming Cao ext4_fsblk_t start; 5722617ba13bSMingming Cao ext4_fsblk_t len; 5723ac27a0ecSDave Kleikamp int hblock, blocksize; 5724617ba13bSMingming Cao ext4_fsblk_t sb_block; 5725ac27a0ecSDave Kleikamp unsigned long offset; 5726617ba13bSMingming Cao struct ext4_super_block *es; 5727ac27a0ecSDave Kleikamp struct block_device *bdev; 5728ac27a0ecSDave Kleikamp 572911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 573011215630SJan Kara return NULL; 57310390131bSFrank Mayhar 5732b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5733ac27a0ecSDave Kleikamp if (bdev == NULL) 5734ac27a0ecSDave Kleikamp return NULL; 5735ac27a0ecSDave Kleikamp 5736ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5737e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5738ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5739b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5740b31e1552SEric Sandeen "blocksize too small for journal device"); 5741ac27a0ecSDave Kleikamp goto out_bdev; 5742ac27a0ecSDave Kleikamp } 5743ac27a0ecSDave Kleikamp 5744617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5745617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5746ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5747ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5748b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5749b31e1552SEric Sandeen "external journal"); 5750ac27a0ecSDave Kleikamp goto out_bdev; 5751ac27a0ecSDave Kleikamp } 5752ac27a0ecSDave Kleikamp 57532716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5754617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5755ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5756617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5757b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5758b31e1552SEric Sandeen "bad superblock"); 5759ac27a0ecSDave Kleikamp brelse(bh); 5760ac27a0ecSDave Kleikamp goto out_bdev; 5761ac27a0ecSDave Kleikamp } 5762ac27a0ecSDave Kleikamp 5763df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5764df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5765df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5766df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5767df4763beSDarrick J. Wong "corrupt superblock"); 5768df4763beSDarrick J. Wong brelse(bh); 5769df4763beSDarrick J. Wong goto out_bdev; 5770df4763beSDarrick J. Wong } 5771df4763beSDarrick J. Wong 5772617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5773b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5774ac27a0ecSDave Kleikamp brelse(bh); 5775ac27a0ecSDave Kleikamp goto out_bdev; 5776ac27a0ecSDave Kleikamp } 5777ac27a0ecSDave Kleikamp 5778bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5779ac27a0ecSDave Kleikamp start = sb_block + 1; 5780ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5781ac27a0ecSDave Kleikamp 5782dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5783ac27a0ecSDave Kleikamp start, len, blocksize); 5784ac27a0ecSDave Kleikamp if (!journal) { 5785b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5786ac27a0ecSDave Kleikamp goto out_bdev; 5787ac27a0ecSDave Kleikamp } 5788ac27a0ecSDave Kleikamp journal->j_private = sb; 57892d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5791ac27a0ecSDave Kleikamp goto out_journal; 5792ac27a0ecSDave Kleikamp } 5793ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5794b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5795b31e1552SEric Sandeen "user (unsupported) - %d", 5796ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5797ac27a0ecSDave Kleikamp goto out_journal; 5798ac27a0ecSDave Kleikamp } 5799ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5800617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5801ac27a0ecSDave Kleikamp return journal; 58020b8e58a1SAndreas Dilger 5803ac27a0ecSDave Kleikamp out_journal: 5804dab291afSMingming Cao jbd2_journal_destroy(journal); 5805ac27a0ecSDave Kleikamp out_bdev: 5806617ba13bSMingming Cao ext4_blkdev_put(bdev); 5807ac27a0ecSDave Kleikamp return NULL; 5808ac27a0ecSDave Kleikamp } 5809ac27a0ecSDave Kleikamp 5810617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5811617ba13bSMingming Cao struct ext4_super_block *es, 5812ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5813ac27a0ecSDave Kleikamp { 5814ac27a0ecSDave Kleikamp journal_t *journal; 5815ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5816ac27a0ecSDave Kleikamp dev_t journal_dev; 5817ac27a0ecSDave Kleikamp int err = 0; 5818ac27a0ecSDave Kleikamp int really_read_only; 5819273108faSLukas Czerner int journal_dev_ro; 5820ac27a0ecSDave Kleikamp 582111215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 582211215630SJan Kara return -EFSCORRUPTED; 58230390131bSFrank Mayhar 5824ac27a0ecSDave Kleikamp if (journal_devnum && 5825ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5826b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5827b31e1552SEric Sandeen "numbers have changed"); 5828ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5829ac27a0ecSDave Kleikamp } else 5830ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5831ac27a0ecSDave Kleikamp 5832273108faSLukas Czerner if (journal_inum && journal_dev) { 5833273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5834273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5835273108faSLukas Czerner return -EINVAL; 5836273108faSLukas Czerner } 5837273108faSLukas Czerner 5838273108faSLukas Czerner if (journal_inum) { 5839273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5840273108faSLukas Czerner if (!journal) 5841273108faSLukas Czerner return -EINVAL; 5842273108faSLukas Czerner } else { 5843273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5844273108faSLukas Czerner if (!journal) 5845273108faSLukas Czerner return -EINVAL; 5846273108faSLukas Czerner } 5847273108faSLukas Czerner 5848273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5849273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5850273108faSLukas Czerner 5851273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5852273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5853273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5854273108faSLukas Czerner err = -EROFS; 5855273108faSLukas Czerner goto err_out; 5856273108faSLukas Czerner } 5857ac27a0ecSDave Kleikamp 5858ac27a0ecSDave Kleikamp /* 5859ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5860ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5861ac27a0ecSDave Kleikamp * can get read-write access to the device. 5862ac27a0ecSDave Kleikamp */ 5863e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5864bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5865b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5866b31e1552SEric Sandeen "required on readonly filesystem"); 5867ac27a0ecSDave Kleikamp if (really_read_only) { 5868b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5869d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5870d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5871273108faSLukas Czerner err = -EROFS; 5872273108faSLukas Czerner goto err_out; 5873ac27a0ecSDave Kleikamp } 5874b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5875b31e1552SEric Sandeen "be enabled during recovery"); 5876ac27a0ecSDave Kleikamp } 5877ac27a0ecSDave Kleikamp } 5878ac27a0ecSDave Kleikamp 587990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5880b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 58814776004fSTheodore Ts'o 5882e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5883dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 58841c13d5c0STheodore Ts'o if (!err) { 58851c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 58861c13d5c0STheodore Ts'o if (save) 58871c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 58881c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5889dab291afSMingming Cao err = jbd2_journal_load(journal); 58901c13d5c0STheodore Ts'o if (save) 58911c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 58921c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 58931c13d5c0STheodore Ts'o kfree(save); 58941c13d5c0STheodore Ts'o } 5895ac27a0ecSDave Kleikamp 5896ac27a0ecSDave Kleikamp if (err) { 5897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5898273108faSLukas Czerner goto err_out; 5899ac27a0ecSDave Kleikamp } 5900ac27a0ecSDave Kleikamp 5901617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 590211215630SJan Kara err = ext4_clear_journal_err(sb, es); 590311215630SJan Kara if (err) { 590411215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 590511215630SJan Kara jbd2_journal_destroy(journal); 590611215630SJan Kara return err; 590711215630SJan Kara } 5908ac27a0ecSDave Kleikamp 5909c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5910ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5911ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5912ac27a0ecSDave Kleikamp 5913ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 59144392fbc4SJan Kara ext4_commit_super(sb); 5915ac27a0ecSDave Kleikamp } 5916ac27a0ecSDave Kleikamp 5917ac27a0ecSDave Kleikamp return 0; 5918273108faSLukas Czerner 5919273108faSLukas Czerner err_out: 5920273108faSLukas Czerner jbd2_journal_destroy(journal); 5921273108faSLukas Czerner return err; 5922ac27a0ecSDave Kleikamp } 5923ac27a0ecSDave Kleikamp 59242d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 59252d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5926ac27a0ecSDave Kleikamp { 5927c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5928e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5929e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5930ac27a0ecSDave Kleikamp 593105c2c00fSJan Kara lock_buffer(sbh); 5932a17712c8SJon Derrick /* 593371290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 593471290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 593571290b36STheodore Ts'o * write time when we are mounting the root file system 593671290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 593771290b36STheodore Ts'o * for people who are east of GMT and who make their clock 593871290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 593971290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 594071290b36STheodore Ts'o * to complain and force a full file system check. 594171290b36STheodore Ts'o */ 59421751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 59436a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5944afc32f7eSTheodore Ts'o es->s_kbytes_written = 5945e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 59468446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5947e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5948e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 594957042651STheodore Ts'o ext4_free_blocks_count_set(es, 5950e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5951e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5952e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 59537f93cff9STheodore Ts'o es->s_free_inodes_count = 59547f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5955e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5956c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5957c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5958c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5959c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5960c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5961c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5962c92dc856SJan Kara &es->s_first_error_time_hi, 5963c92dc856SJan Kara sbi->s_first_error_time); 5964c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5965c92dc856SJan Kara sizeof(es->s_first_error_func)); 5966c92dc856SJan Kara es->s_first_error_line = 5967c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5968c92dc856SJan Kara es->s_first_error_ino = 5969c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5970c92dc856SJan Kara es->s_first_error_block = 5971c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5972c92dc856SJan Kara es->s_first_error_errcode = 5973c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5974c92dc856SJan Kara } 5975c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5976c92dc856SJan Kara &es->s_last_error_time_hi, 5977c92dc856SJan Kara sbi->s_last_error_time); 5978c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5979c92dc856SJan Kara sizeof(es->s_last_error_func)); 5980c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5981c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5982c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5983c92dc856SJan Kara es->s_last_error_errcode = 5984c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5985c92dc856SJan Kara /* 5986c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5987c92dc856SJan Kara * started already 5988c92dc856SJan Kara */ 5989c92dc856SJan Kara if (!es->s_error_count) 5990c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5991c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5992c92dc856SJan Kara sbi->s_add_error_count = 0; 5993c92dc856SJan Kara } 5994c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5995c92dc856SJan Kara 599606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 59972d01ddc8SJan Kara unlock_buffer(sbh); 59982d01ddc8SJan Kara } 59992d01ddc8SJan Kara 60002d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 60012d01ddc8SJan Kara { 60022d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 60032d01ddc8SJan Kara int error = 0; 60042d01ddc8SJan Kara 6005f88f1466SFengnan Chang if (!sbh) 6006f88f1466SFengnan Chang return -EINVAL; 6007f88f1466SFengnan Chang if (block_device_ejected(sb)) 6008f88f1466SFengnan Chang return -ENODEV; 60092d01ddc8SJan Kara 60102d01ddc8SJan Kara ext4_update_super(sb); 60112d01ddc8SJan Kara 6012e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 60134743f839SPranay Kr. Srivastava /* 60144743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 60154743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 60164743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 60174743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 60184743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 60194743f839SPranay Kr. Srivastava * write and hope for the best. 60204743f839SPranay Kr. Srivastava */ 60214743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 60224743f839SPranay Kr. Srivastava "superblock detected"); 60234743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 60244743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 60254743f839SPranay Kr. Srivastava } 60262d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 6027ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 6028564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 602900473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 6030c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6031b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6032b31e1552SEric Sandeen "superblock"); 6033914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6034914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 6035914258bfSTheodore Ts'o } 6036c4be0c1dSTakashi Sato return error; 6037ac27a0ecSDave Kleikamp } 6038ac27a0ecSDave Kleikamp 6039ac27a0ecSDave Kleikamp /* 6040ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6041ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6042ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6043ac27a0ecSDave Kleikamp */ 604411215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6045617ba13bSMingming Cao struct ext4_super_block *es) 6046ac27a0ecSDave Kleikamp { 604711215630SJan Kara int err; 6048617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6049ac27a0ecSDave Kleikamp 6050e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 605111215630SJan Kara if (journal != NULL) { 605211215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 605311215630SJan Kara "mounted!"); 605411215630SJan Kara return -EFSCORRUPTED; 605511215630SJan Kara } 605611215630SJan Kara return 0; 60570390131bSFrank Mayhar } 6058dab291afSMingming Cao jbd2_journal_lock_updates(journal); 605901d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 606011215630SJan Kara if (err < 0) 60617ffe1ea8SHidehiro Kawai goto out; 60627ffe1ea8SHidehiro Kawai 606302f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 606402f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 606502f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 606602f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 606702f310fcSJan Kara err = -EFSCORRUPTED; 606802f310fcSJan Kara goto out; 606902f310fcSJan Kara } 6070e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 607102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 60724392fbc4SJan Kara ext4_commit_super(sb); 6073ac27a0ecSDave Kleikamp } 60747ffe1ea8SHidehiro Kawai out: 6075dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 607611215630SJan Kara return err; 6077ac27a0ecSDave Kleikamp } 6078ac27a0ecSDave Kleikamp 6079ac27a0ecSDave Kleikamp /* 6080ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6081ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6082ac27a0ecSDave Kleikamp * main filesystem now. 6083ac27a0ecSDave Kleikamp */ 608411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6085617ba13bSMingming Cao struct ext4_super_block *es) 6086ac27a0ecSDave Kleikamp { 6087ac27a0ecSDave Kleikamp journal_t *journal; 6088ac27a0ecSDave Kleikamp int j_errno; 6089ac27a0ecSDave Kleikamp const char *errstr; 6090ac27a0ecSDave Kleikamp 609111215630SJan Kara if (!ext4_has_feature_journal(sb)) { 609211215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 609311215630SJan Kara return -EFSCORRUPTED; 609411215630SJan Kara } 60950390131bSFrank Mayhar 6096617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6097ac27a0ecSDave Kleikamp 6098ac27a0ecSDave Kleikamp /* 6099ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6100617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6101ac27a0ecSDave Kleikamp */ 6102ac27a0ecSDave Kleikamp 6103dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6104ac27a0ecSDave Kleikamp if (j_errno) { 6105ac27a0ecSDave Kleikamp char nbuf[16]; 6106ac27a0ecSDave Kleikamp 6107617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 610812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6109ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 611012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6111ac27a0ecSDave Kleikamp 6112617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6113617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 61144392fbc4SJan Kara ext4_commit_super(sb); 6115ac27a0ecSDave Kleikamp 6116dab291afSMingming Cao jbd2_journal_clear_err(journal); 6117d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6118ac27a0ecSDave Kleikamp } 611911215630SJan Kara return 0; 6120ac27a0ecSDave Kleikamp } 6121ac27a0ecSDave Kleikamp 6122ac27a0ecSDave Kleikamp /* 6123ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6124ac27a0ecSDave Kleikamp * and wait on the commit. 6125ac27a0ecSDave Kleikamp */ 6126617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6127ac27a0ecSDave Kleikamp { 6128ac27a0ecSDave Kleikamp journal_t *journal; 6129ac27a0ecSDave Kleikamp 6130bc98a42cSDavid Howells if (sb_rdonly(sb)) 6131ac27a0ecSDave Kleikamp return 0; 6132ac27a0ecSDave Kleikamp 6133617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6134b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6135ac27a0ecSDave Kleikamp } 6136ac27a0ecSDave Kleikamp 6137617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6138ac27a0ecSDave Kleikamp { 613914ce0cb4STheodore Ts'o int ret = 0; 61409eddacf9SJan Kara tid_t target; 614106a407f1SDmitry Monakhov bool needs_barrier = false; 61428d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6143ac27a0ecSDave Kleikamp 614449598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 61450db1ff22STheodore Ts'o return 0; 61460db1ff22STheodore Ts'o 61479bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 61482e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6149a1177825SJan Kara /* 6150a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6151a1177825SJan Kara * no dirty dquots 6152a1177825SJan Kara */ 6153a1177825SJan Kara dquot_writeback_dquots(sb, -1); 615406a407f1SDmitry Monakhov /* 615506a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 615606a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 615706a407f1SDmitry Monakhov * transaction_commit will do it for us. 615806a407f1SDmitry Monakhov */ 6159bda32530STheodore Ts'o if (sbi->s_journal) { 616006a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 616106a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 616206a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 616306a407f1SDmitry Monakhov needs_barrier = true; 616406a407f1SDmitry Monakhov 61658d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6166ac27a0ecSDave Kleikamp if (wait) 6167bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6168bda32530STheodore Ts'o target); 61690390131bSFrank Mayhar } 6170bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6171bda32530STheodore Ts'o needs_barrier = true; 617206a407f1SDmitry Monakhov if (needs_barrier) { 617306a407f1SDmitry Monakhov int err; 6174c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 617506a407f1SDmitry Monakhov if (!ret) 617606a407f1SDmitry Monakhov ret = err; 617706a407f1SDmitry Monakhov } 617806a407f1SDmitry Monakhov 617906a407f1SDmitry Monakhov return ret; 618006a407f1SDmitry Monakhov } 618106a407f1SDmitry Monakhov 6182ac27a0ecSDave Kleikamp /* 6183ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6184ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6185be4f27d3SYongqiang Yang * 6186be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 61878e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 61888e8ad8a5SJan Kara * modifications. 6189ac27a0ecSDave Kleikamp */ 6190c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6191ac27a0ecSDave Kleikamp { 6192c4be0c1dSTakashi Sato int error = 0; 6193c4be0c1dSTakashi Sato journal_t *journal; 6194ac27a0ecSDave Kleikamp 6195bc98a42cSDavid Howells if (sb_rdonly(sb)) 61969ca92389STheodore Ts'o return 0; 61979ca92389STheodore Ts'o 6198c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6199ac27a0ecSDave Kleikamp 6200bb044576STheodore Ts'o if (journal) { 6201ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6202dab291afSMingming Cao jbd2_journal_lock_updates(journal); 62037ffe1ea8SHidehiro Kawai 62047ffe1ea8SHidehiro Kawai /* 6205bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6206bb044576STheodore Ts'o * flush the journal. 62077ffe1ea8SHidehiro Kawai */ 620801d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 62096b0310fbSEric Sandeen if (error < 0) 62106b0310fbSEric Sandeen goto out; 6211ac27a0ecSDave Kleikamp 6212ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6213e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 621402f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 621502f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6216c642dc9eSEric Sandeen } 6217c642dc9eSEric Sandeen 62184392fbc4SJan Kara error = ext4_commit_super(sb); 62196b0310fbSEric Sandeen out: 6220bb044576STheodore Ts'o if (journal) 62218e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6222bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 62236b0310fbSEric Sandeen return error; 6224ac27a0ecSDave Kleikamp } 6225ac27a0ecSDave Kleikamp 6226ac27a0ecSDave Kleikamp /* 6227ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6228ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6229ac27a0ecSDave Kleikamp */ 6230c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6231ac27a0ecSDave Kleikamp { 6232bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 62339ca92389STheodore Ts'o return 0; 62349ca92389STheodore Ts'o 6235c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 62369ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6237e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 623802f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 623902f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6240c642dc9eSEric Sandeen } 6241c642dc9eSEric Sandeen 62424392fbc4SJan Kara ext4_commit_super(sb); 6243c4be0c1dSTakashi Sato return 0; 6244ac27a0ecSDave Kleikamp } 6245ac27a0ecSDave Kleikamp 6246673c6100STheodore Ts'o /* 6247673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6248673c6100STheodore Ts'o */ 6249673c6100STheodore Ts'o struct ext4_mount_options { 6250673c6100STheodore Ts'o unsigned long s_mount_opt; 6251a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 625208cefc7aSEric W. Biederman kuid_t s_resuid; 625308cefc7aSEric W. Biederman kgid_t s_resgid; 6254673c6100STheodore Ts'o unsigned long s_commit_interval; 6255673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6256673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6257673c6100STheodore Ts'o int s_jquota_fmt; 6258a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6259673c6100STheodore Ts'o #endif 6260673c6100STheodore Ts'o }; 6261673c6100STheodore Ts'o 6262960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6263ac27a0ecSDave Kleikamp { 62647edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6265617ba13bSMingming Cao struct ext4_super_block *es; 6266617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6267960e0ab6SLukas Czerner unsigned long old_sb_flags; 6268617ba13bSMingming Cao struct ext4_mount_options old_opts; 62698a266467STheodore Ts'o ext4_group_t g; 6270c5e06d10SJohann Lombardi int err = 0; 6271ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 62723bbef91bSAustin Kim int enable_quota = 0; 627303dafb5fSChen Gang int i, j; 627433458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6275ac27a0ecSDave Kleikamp #endif 6276b237e304SHarshad Shirwadkar 62777edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 627821ac738eSChengguang Xu 6279ac27a0ecSDave Kleikamp /* Store the original options */ 6280ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6281ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6282a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6283ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6284ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6285ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 628630773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 628730773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6288ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6289ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6290a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 629103dafb5fSChen Gang if (sbi->s_qf_names[i]) { 629233458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 629333458eabSTheodore Ts'o 629433458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 629503dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 629603dafb5fSChen Gang for (j = 0; j < i; j++) 629703dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 629803dafb5fSChen Gang return -ENOMEM; 629903dafb5fSChen Gang } 630003dafb5fSChen Gang } else 630103dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6302ac27a0ecSDave Kleikamp #endif 6303b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 63047edfd85bSLukas Czerner ctx->journal_ioprio = 6305b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6306ac27a0ecSDave Kleikamp 63077edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6308ac27a0ecSDave Kleikamp 63096b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 63106b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 63116b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 63122d5b86e0SEric Sandeen "during remount not supported; ignoring"); 63132d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6314c6d3d56dSDarrick J. Wong } 6315c6d3d56dSDarrick J. Wong 63166ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 63176ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 63186ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63196ae6514bSPiotr Sarna "both data=journal and delalloc"); 63206ae6514bSPiotr Sarna err = -EINVAL; 63216ae6514bSPiotr Sarna goto restore_opts; 63226ae6514bSPiotr Sarna } 63236ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 63246ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63256ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 63266ae6514bSPiotr Sarna err = -EINVAL; 63276ae6514bSPiotr Sarna goto restore_opts; 63286ae6514bSPiotr Sarna } 6329ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6330ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6331ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6332ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6333ab04df78SJan Kara err = -EINVAL; 6334ab04df78SJan Kara goto restore_opts; 6335ab04df78SJan Kara } 6336923ae0ffSRoss Zwisler } 6337923ae0ffSRoss Zwisler 6338cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6339cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6340cdb7ee4cSTahsin Erdogan err = -EINVAL; 6341cdb7ee4cSTahsin Erdogan goto restore_opts; 6342cdb7ee4cSTahsin Erdogan } 6343cdb7ee4cSTahsin Erdogan 63449b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6345124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6346ac27a0ecSDave Kleikamp 63471751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 63481751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6349ac27a0ecSDave Kleikamp 6350ac27a0ecSDave Kleikamp es = sbi->s_es; 6351ac27a0ecSDave Kleikamp 6352b3881f74STheodore Ts'o if (sbi->s_journal) { 6353617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 63547edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6355b3881f74STheodore Ts'o } 6356ac27a0ecSDave Kleikamp 6357c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6358c92dc856SJan Kara flush_work(&sbi->s_error_work); 6359c92dc856SJan Kara 6360960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 63619b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6362ac27a0ecSDave Kleikamp err = -EROFS; 6363ac27a0ecSDave Kleikamp goto restore_opts; 6364ac27a0ecSDave Kleikamp } 6365ac27a0ecSDave Kleikamp 6366960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 636738c03b34STheodore Ts'o err = sync_filesystem(sb); 636838c03b34STheodore Ts'o if (err < 0) 636938c03b34STheodore Ts'o goto restore_opts; 63700f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 63710f0dd62fSChristoph Hellwig if (err < 0) 6372c79d967dSChristoph Hellwig goto restore_opts; 6373c79d967dSChristoph Hellwig 6374ac27a0ecSDave Kleikamp /* 6375ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6376ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6377ac27a0ecSDave Kleikamp */ 63781751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6379ac27a0ecSDave Kleikamp 6380ac27a0ecSDave Kleikamp /* 6381ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6382ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6383ac27a0ecSDave Kleikamp * mark the partition as valid again. 6384ac27a0ecSDave Kleikamp */ 6385617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6386617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6387ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6388ac27a0ecSDave Kleikamp 638911215630SJan Kara if (sbi->s_journal) { 639011215630SJan Kara /* 639111215630SJan Kara * We let remount-ro finish even if marking fs 639211215630SJan Kara * as clean failed... 639311215630SJan Kara */ 6394617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 639511215630SJan Kara } 6396ac27a0ecSDave Kleikamp } else { 6397a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6398e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 63992cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6400ac27a0ecSDave Kleikamp err = -EROFS; 6401ac27a0ecSDave Kleikamp goto restore_opts; 6402ac27a0ecSDave Kleikamp } 6403ead6596bSEric Sandeen /* 64048a266467STheodore Ts'o * Make sure the group descriptor checksums 64050b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 64068a266467STheodore Ts'o */ 64078a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 64088a266467STheodore Ts'o struct ext4_group_desc *gdp = 64098a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 64108a266467STheodore Ts'o 6411feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6412b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6413b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6414e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 64158a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 64166a797d27SDarrick J. Wong err = -EFSBADCRC; 64178a266467STheodore Ts'o goto restore_opts; 64188a266467STheodore Ts'o } 64198a266467STheodore Ts'o } 64208a266467STheodore Ts'o 64218a266467STheodore Ts'o /* 6422ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6423ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6424ead6596bSEric Sandeen * require a full umount/remount for now. 6425ead6596bSEric Sandeen */ 642602f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6427b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6428ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6429ead6596bSEric Sandeen "orphan inode list. Please " 6430b31e1552SEric Sandeen "umount/remount instead"); 6431ead6596bSEric Sandeen err = -EINVAL; 6432ead6596bSEric Sandeen goto restore_opts; 6433ead6596bSEric Sandeen } 6434ead6596bSEric Sandeen 6435ac27a0ecSDave Kleikamp /* 6436ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6437ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6438ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6439ac27a0ecSDave Kleikamp * the partition.) 6440ac27a0ecSDave Kleikamp */ 644111215630SJan Kara if (sbi->s_journal) { 644211215630SJan Kara err = ext4_clear_journal_err(sb, es); 644311215630SJan Kara if (err) 644411215630SJan Kara goto restore_opts; 644511215630SJan Kara } 6446ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6447c89128a0SJaegeuk Kim 6448c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6449c89128a0SJaegeuk Kim if (err) 6450c89128a0SJaegeuk Kim goto restore_opts; 6451c89128a0SJaegeuk Kim 64521751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6453e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6454c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6455c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6456c5e06d10SJohann Lombardi err = -EROFS; 6457c5e06d10SJohann Lombardi goto restore_opts; 6458c5e06d10SJohann Lombardi } 64593bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6460c79d967dSChristoph Hellwig enable_quota = 1; 64613bbef91bSAustin Kim #endif 6462ac27a0ecSDave Kleikamp } 6463ac27a0ecSDave Kleikamp } 6464bfff6873SLukas Czerner 6465bfff6873SLukas Czerner /* 6466bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6467bfff6873SLukas Czerner * current settings 6468bfff6873SLukas Czerner */ 6469bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6470bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6471bfff6873SLukas Czerner else { 6472bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6473bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6474bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6475bfff6873SLukas Czerner } 6476bfff6873SLukas Czerner 64770f5bde1dSJan Kara /* 64780f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 64790f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 64800f5bde1dSJan Kara * succeed. 64810f5bde1dSJan Kara */ 6482dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6483d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6484d176b1f6SJan Kara if (err) 6485d176b1f6SJan Kara goto restore_opts; 64860f5bde1dSJan Kara } 6487d176b1f6SJan Kara 6488c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64894392fbc4SJan Kara err = ext4_commit_super(sb); 6490c89128a0SJaegeuk Kim if (err) 6491c89128a0SJaegeuk Kim goto restore_opts; 6492c89128a0SJaegeuk Kim } 64930390131bSFrank Mayhar 6494ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6495ac27a0ecSDave Kleikamp /* Release old quota file names */ 6496a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6497ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 64987c319d32SAditya Kali if (enable_quota) { 64997c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 65000f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6501e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 65027c319d32SAditya Kali err = ext4_enable_quotas(sb); 650307724f98STheodore Ts'o if (err) 65047c319d32SAditya Kali goto restore_opts; 65057c319d32SAditya Kali } 65067c319d32SAditya Kali } 65077c319d32SAditya Kali #endif 6508dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65090f5bde1dSJan Kara ext4_release_system_zone(sb); 6510d4c402d9SCurt Wohlgemuth 651161bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 651261bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 651361bb4a1cSTheodore Ts'o 6514ac27a0ecSDave Kleikamp return 0; 65150b8e58a1SAndreas Dilger 6516ac27a0ecSDave Kleikamp restore_opts: 6517ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6518ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6519a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6520ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6521ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6522ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 652330773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 652430773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6525dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65260f5bde1dSJan Kara ext4_release_system_zone(sb); 6527ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6528ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6529a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 653033458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 653133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6532ac27a0ecSDave Kleikamp } 653333458eabSTheodore Ts'o synchronize_rcu(); 653433458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 653533458eabSTheodore Ts'o kfree(to_free[i]); 6536ac27a0ecSDave Kleikamp #endif 653761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 653861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6539ac27a0ecSDave Kleikamp return err; 6540ac27a0ecSDave Kleikamp } 6541ac27a0ecSDave Kleikamp 6542cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 65437edfd85bSLukas Czerner { 6544cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 65457edfd85bSLukas Czerner int ret; 65467edfd85bSLukas Czerner 6547cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 65487edfd85bSLukas Czerner 6549cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 65507edfd85bSLukas Czerner if (ret < 0) 65517edfd85bSLukas Czerner return ret; 6552cebe85d5SLukas Czerner 6553960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6554cebe85d5SLukas Czerner if (ret < 0) 6555cebe85d5SLukas Czerner return ret; 6556cebe85d5SLukas Czerner 6557cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6558cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6559cebe85d5SLukas Czerner 6560cebe85d5SLukas Czerner return 0; 65617edfd85bSLukas Czerner } 65627edfd85bSLukas Czerner 6563689c958cSLi Xi #ifdef CONFIG_QUOTA 6564689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6565689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6566689c958cSLi Xi { 6567689c958cSLi Xi struct kqid qid; 6568689c958cSLi Xi struct dquot *dquot; 6569689c958cSLi Xi u64 limit; 6570689c958cSLi Xi u64 curblock; 6571689c958cSLi Xi 6572689c958cSLi Xi qid = make_kqid_projid(projid); 6573689c958cSLi Xi dquot = dqget(sb, qid); 6574689c958cSLi Xi if (IS_ERR(dquot)) 6575689c958cSLi Xi return PTR_ERR(dquot); 65767b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6577689c958cSLi Xi 6578a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6579a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 658057c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 658157c32ea4SChengguang Xu 6582689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6583f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6584f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6585689c958cSLi Xi buf->f_blocks = limit; 6586689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6587689c958cSLi Xi (buf->f_blocks > curblock) ? 6588689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6589689c958cSLi Xi } 6590689c958cSLi Xi 6591a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6592a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6593689c958cSLi Xi if (limit && buf->f_files > limit) { 6594689c958cSLi Xi buf->f_files = limit; 6595689c958cSLi Xi buf->f_ffree = 6596689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6597689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6598689c958cSLi Xi } 6599689c958cSLi Xi 66007b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6601689c958cSLi Xi dqput(dquot); 6602689c958cSLi Xi return 0; 6603689c958cSLi Xi } 6604689c958cSLi Xi #endif 6605689c958cSLi Xi 6606617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6607ac27a0ecSDave Kleikamp { 6608ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6609617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6610617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 661127dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6612d02a9391SKazuya Mio s64 bfree; 661327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6614ac27a0ecSDave Kleikamp 6615952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6616952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6617ac27a0ecSDave Kleikamp 6618617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6619ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6620b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 662157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 662257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6623d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 662457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 662527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 662627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 662727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6628ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6629ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 663052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6631617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 66329591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 66330b8e58a1SAndreas Dilger 6634689c958cSLi Xi #ifdef CONFIG_QUOTA 6635689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6636689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6637689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6638689c958cSLi Xi #endif 6639ac27a0ecSDave Kleikamp return 0; 6640ac27a0ecSDave Kleikamp } 6641ac27a0ecSDave Kleikamp 6642ac27a0ecSDave Kleikamp 6643ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6644ac27a0ecSDave Kleikamp 6645bc8230eeSJan Kara /* 6646bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6647bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6648bc8230eeSJan Kara */ 6649ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6650ac27a0ecSDave Kleikamp { 66514c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6652ac27a0ecSDave Kleikamp } 6653ac27a0ecSDave Kleikamp 6654617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6655ac27a0ecSDave Kleikamp { 6656ac27a0ecSDave Kleikamp int ret, err; 6657ac27a0ecSDave Kleikamp handle_t *handle; 6658ac27a0ecSDave Kleikamp struct inode *inode; 6659ac27a0ecSDave Kleikamp 6660ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 66619924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6662617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6663ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6664ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6665ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6666617ba13bSMingming Cao err = ext4_journal_stop(handle); 6667ac27a0ecSDave Kleikamp if (!ret) 6668ac27a0ecSDave Kleikamp ret = err; 6669ac27a0ecSDave Kleikamp return ret; 6670ac27a0ecSDave Kleikamp } 6671ac27a0ecSDave Kleikamp 6672617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6673ac27a0ecSDave Kleikamp { 6674ac27a0ecSDave Kleikamp int ret, err; 6675ac27a0ecSDave Kleikamp handle_t *handle; 6676ac27a0ecSDave Kleikamp 66779924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6678617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6679ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6680ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6681ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6682617ba13bSMingming Cao err = ext4_journal_stop(handle); 6683ac27a0ecSDave Kleikamp if (!ret) 6684ac27a0ecSDave Kleikamp ret = err; 6685ac27a0ecSDave Kleikamp return ret; 6686ac27a0ecSDave Kleikamp } 6687ac27a0ecSDave Kleikamp 6688617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6689ac27a0ecSDave Kleikamp { 6690ac27a0ecSDave Kleikamp int ret, err; 6691ac27a0ecSDave Kleikamp handle_t *handle; 6692ac27a0ecSDave Kleikamp 66939924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6694617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 66959c3013e9SJan Kara if (IS_ERR(handle)) { 66969c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 66979c3013e9SJan Kara dquot_release(dquot); 6698ac27a0ecSDave Kleikamp return PTR_ERR(handle); 66999c3013e9SJan Kara } 6700ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6701617ba13bSMingming Cao err = ext4_journal_stop(handle); 6702ac27a0ecSDave Kleikamp if (!ret) 6703ac27a0ecSDave Kleikamp ret = err; 6704ac27a0ecSDave Kleikamp return ret; 6705ac27a0ecSDave Kleikamp } 6706ac27a0ecSDave Kleikamp 6707617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6708ac27a0ecSDave Kleikamp { 6709262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6710262b4662SJan Kara 6711f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6712ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6713617ba13bSMingming Cao return ext4_write_dquot(dquot); 6714ac27a0ecSDave Kleikamp } else { 6715ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6716ac27a0ecSDave Kleikamp } 6717ac27a0ecSDave Kleikamp } 6718ac27a0ecSDave Kleikamp 6719617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6720ac27a0ecSDave Kleikamp { 6721ac27a0ecSDave Kleikamp int ret, err; 6722ac27a0ecSDave Kleikamp handle_t *handle; 6723ac27a0ecSDave Kleikamp 6724ac27a0ecSDave Kleikamp /* Data block + inode block */ 67252b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6726ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6727ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6728ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6729617ba13bSMingming Cao err = ext4_journal_stop(handle); 6730ac27a0ecSDave Kleikamp if (!ret) 6731ac27a0ecSDave Kleikamp ret = err; 6732ac27a0ecSDave Kleikamp return ret; 6733ac27a0ecSDave Kleikamp } 6734ac27a0ecSDave Kleikamp 6735daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6736daf647d2STheodore Ts'o { 6737daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6738daf647d2STheodore Ts'o 6739daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6740daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6741daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6742daf647d2STheodore Ts'o * because the name of the lock is set using the 6743daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6744daf647d2STheodore Ts'o */ 6745daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6746daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6747daf647d2STheodore Ts'o } 6748daf647d2STheodore Ts'o 6749ac27a0ecSDave Kleikamp /* 6750ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6751ac27a0ecSDave Kleikamp */ 6752617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 67538c54ca9cSAl Viro const struct path *path) 6754ac27a0ecSDave Kleikamp { 6755ac27a0ecSDave Kleikamp int err; 6756ac27a0ecSDave Kleikamp 6757ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6758ac27a0ecSDave Kleikamp return -EINVAL; 67590623543bSJan Kara 6760ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6761d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6762ac27a0ecSDave Kleikamp return -EXDEV; 6763e0770e91SJan Kara 6764e0770e91SJan Kara /* Quota already enabled for this file? */ 6765e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6766e0770e91SJan Kara return -EBUSY; 6767e0770e91SJan Kara 67680623543bSJan Kara /* Journaling quota? */ 67690623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 67702b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6771f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6772b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6773b31e1552SEric Sandeen "Quota file not on filesystem root. " 6774b31e1552SEric Sandeen "Journaled quota will not work"); 677591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 677691389240SJan Kara } else { 677791389240SJan Kara /* 677891389240SJan Kara * Clear the flag just in case mount options changed since 677991389240SJan Kara * last time. 678091389240SJan Kara */ 678191389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 67820623543bSJan Kara } 67830623543bSJan Kara 67840623543bSJan Kara /* 67850623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 67860623543bSJan Kara * all updates to the file when we bypass pagecache... 67870623543bSJan Kara */ 67880390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67892b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 67900623543bSJan Kara /* 67910623543bSJan Kara * We don't need to lock updates but journal_flush() could 67920623543bSJan Kara * otherwise be livelocked... 67930623543bSJan Kara */ 67940623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 679501d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 67960623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6797f00c9e44SJan Kara if (err) 67987ffe1ea8SHidehiro Kawai return err; 67997ffe1ea8SHidehiro Kawai } 6800957153fcSJan Kara 6801daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6802daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 680315fc69bbSJan Kara if (!err) { 6804957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6805957153fcSJan Kara handle_t *handle; 6806957153fcSJan Kara 680761a92987SJan Kara /* 680861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 680961a92987SJan Kara * files. If this fails, we return success anyway since quotas 681061a92987SJan Kara * are already enabled and this is not a hard failure. 681161a92987SJan Kara */ 6812957153fcSJan Kara inode_lock(inode); 6813957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6814957153fcSJan Kara if (IS_ERR(handle)) 6815957153fcSJan Kara goto unlock_inode; 6816957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6817957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6818957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 68194209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6820957153fcSJan Kara ext4_journal_stop(handle); 6821957153fcSJan Kara unlock_inode: 6822957153fcSJan Kara inode_unlock(inode); 682315fc69bbSJan Kara if (err) 682415fc69bbSJan Kara dquot_quota_off(sb, type); 6825957153fcSJan Kara } 682615fc69bbSJan Kara if (err) 682715fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 682815fc69bbSJan Kara I_DATA_SEM_NORMAL); 6829daf647d2STheodore Ts'o return err; 6830ac27a0ecSDave Kleikamp } 6831ac27a0ecSDave Kleikamp 68327c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 68337c319d32SAditya Kali unsigned int flags) 68347c319d32SAditya Kali { 68357c319d32SAditya Kali int err; 68367c319d32SAditya Kali struct inode *qf_inode; 6837a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68387c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6839689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6840689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68417c319d32SAditya Kali }; 68427c319d32SAditya Kali 6843e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 68447c319d32SAditya Kali 68457c319d32SAditya Kali if (!qf_inums[type]) 68467c319d32SAditya Kali return -EPERM; 68477c319d32SAditya Kali 68488a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 68497c319d32SAditya Kali if (IS_ERR(qf_inode)) { 68507c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 68517c319d32SAditya Kali return PTR_ERR(qf_inode); 68527c319d32SAditya Kali } 68537c319d32SAditya Kali 6854bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6855bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6856daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 68577212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6858daf647d2STheodore Ts'o if (err) 6859daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 686061157b24SPan Bian iput(qf_inode); 68617c319d32SAditya Kali 68627c319d32SAditya Kali return err; 68637c319d32SAditya Kali } 68647c319d32SAditya Kali 68657c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 686625c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 68677c319d32SAditya Kali { 68687c319d32SAditya Kali int type, err = 0; 6869a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68707c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6871689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6872689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68737c319d32SAditya Kali }; 687449da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 687549da9392SJan Kara test_opt(sb, USRQUOTA), 687649da9392SJan Kara test_opt(sb, GRPQUOTA), 687749da9392SJan Kara test_opt(sb, PRJQUOTA), 687849da9392SJan Kara }; 68797c319d32SAditya Kali 688091389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6881a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 68827c319d32SAditya Kali if (qf_inums[type]) { 68837c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 688449da9392SJan Kara DQUOT_USAGE_ENABLED | 688549da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 68867c319d32SAditya Kali if (err) { 68877c319d32SAditya Kali ext4_warning(sb, 688872ba7450STheodore Ts'o "Failed to enable quota tracking " 688972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 689072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 68914013d47aSJan Kara for (type--; type >= 0; type--) { 68924013d47aSJan Kara struct inode *inode; 68934013d47aSJan Kara 68944013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 68954013d47aSJan Kara if (inode) 68964013d47aSJan Kara inode = igrab(inode); 68977f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 68984013d47aSJan Kara if (inode) { 68994013d47aSJan Kara lockdep_set_quota_inode(inode, 69004013d47aSJan Kara I_DATA_SEM_NORMAL); 69014013d47aSJan Kara iput(inode); 69024013d47aSJan Kara } 69034013d47aSJan Kara } 69047f144fd0SJunichi Uekawa 69057c319d32SAditya Kali return err; 69067c319d32SAditya Kali } 69077c319d32SAditya Kali } 69087c319d32SAditya Kali } 69097c319d32SAditya Kali return 0; 69107c319d32SAditya Kali } 69117c319d32SAditya Kali 6912ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6913ca0e05e4SDmitry Monakhov { 691421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 691521f97697SJan Kara handle_t *handle; 6916957153fcSJan Kara int err; 691721f97697SJan Kara 691887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 691987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 692087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6921ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6922ca0e05e4SDmitry Monakhov 6923957153fcSJan Kara if (!inode || !igrab(inode)) 69240b268590SAmir Goldstein goto out; 69250b268590SAmir Goldstein 6926957153fcSJan Kara err = dquot_quota_off(sb, type); 6927964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6928957153fcSJan Kara goto out_put; 6929957153fcSJan Kara 6930957153fcSJan Kara inode_lock(inode); 693161a92987SJan Kara /* 693261a92987SJan Kara * Update modification times of quota files when userspace can 693361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 693461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 693561a92987SJan Kara */ 69369924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 69374209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 69384209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6939957153fcSJan Kara goto out_unlock; 69404209ae12SHarshad Shirwadkar } 6941957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6942957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6943eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 69444209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 694521f97697SJan Kara ext4_journal_stop(handle); 6946957153fcSJan Kara out_unlock: 6947957153fcSJan Kara inode_unlock(inode); 6948957153fcSJan Kara out_put: 6949964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6950957153fcSJan Kara iput(inode); 6951957153fcSJan Kara return err; 695221f97697SJan Kara out: 6953ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6954ca0e05e4SDmitry Monakhov } 6955ca0e05e4SDmitry Monakhov 6956ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6957ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6958ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6959ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6960617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6961ac27a0ecSDave Kleikamp size_t len, loff_t off) 6962ac27a0ecSDave Kleikamp { 6963ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6964725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6965ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6966ac27a0ecSDave Kleikamp int tocopy; 6967ac27a0ecSDave Kleikamp size_t toread; 6968ac27a0ecSDave Kleikamp struct buffer_head *bh; 6969ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6970ac27a0ecSDave Kleikamp 6971ac27a0ecSDave Kleikamp if (off > i_size) 6972ac27a0ecSDave Kleikamp return 0; 6973ac27a0ecSDave Kleikamp if (off+len > i_size) 6974ac27a0ecSDave Kleikamp len = i_size-off; 6975ac27a0ecSDave Kleikamp toread = len; 6976ac27a0ecSDave Kleikamp while (toread > 0) { 6977ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6978ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 69791c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 69801c215028STheodore Ts'o if (IS_ERR(bh)) 69811c215028STheodore Ts'o return PTR_ERR(bh); 6982ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6983ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6984ac27a0ecSDave Kleikamp else 6985ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6986ac27a0ecSDave Kleikamp brelse(bh); 6987ac27a0ecSDave Kleikamp offset = 0; 6988ac27a0ecSDave Kleikamp toread -= tocopy; 6989ac27a0ecSDave Kleikamp data += tocopy; 6990ac27a0ecSDave Kleikamp blk++; 6991ac27a0ecSDave Kleikamp } 6992ac27a0ecSDave Kleikamp return len; 6993ac27a0ecSDave Kleikamp } 6994ac27a0ecSDave Kleikamp 6995ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6996ac27a0ecSDave Kleikamp * enough credits) */ 6997617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6998ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6999ac27a0ecSDave Kleikamp { 7000ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7001725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 70024209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7003c5e298aeSTheodore Ts'o int retries = 0; 7004ac27a0ecSDave Kleikamp struct buffer_head *bh; 7005ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7006ac27a0ecSDave Kleikamp 7007380a0091SYe Bin if (!handle) { 7008b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7009b31e1552SEric Sandeen " cancelled because transaction is not started", 70109c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 70119c3013e9SJan Kara return -EIO; 70129c3013e9SJan Kara } 701367eeb568SDmitry Monakhov /* 701467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 701567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 701667eeb568SDmitry Monakhov */ 701767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 701867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 701967eeb568SDmitry Monakhov " cancelled because not block aligned", 702067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 702167eeb568SDmitry Monakhov return -EIO; 702267eeb568SDmitry Monakhov } 702367eeb568SDmitry Monakhov 7024c5e298aeSTheodore Ts'o do { 7025c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7026c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7027c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 702845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7029c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 70301c215028STheodore Ts'o if (IS_ERR(bh)) 70311c215028STheodore Ts'o return PTR_ERR(bh); 7032ac27a0ecSDave Kleikamp if (!bh) 7033ac27a0ecSDave Kleikamp goto out; 70345d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7035188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7036ac27a0ecSDave Kleikamp if (err) { 7037ac27a0ecSDave Kleikamp brelse(bh); 70381c215028STheodore Ts'o return err; 7039ac27a0ecSDave Kleikamp } 7040ac27a0ecSDave Kleikamp lock_buffer(bh); 704167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7042ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7043ac27a0ecSDave Kleikamp unlock_buffer(bh); 70440390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7045ac27a0ecSDave Kleikamp brelse(bh); 7046ac27a0ecSDave Kleikamp out: 704767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 704867eeb568SDmitry Monakhov i_size_write(inode, off + len); 7049617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 70504209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 70514209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 70524209ae12SHarshad Shirwadkar err = err2; 705321f97697SJan Kara } 70544209ae12SHarshad Shirwadkar return err ? err : len; 7055ac27a0ecSDave Kleikamp } 7056ac27a0ecSDave Kleikamp #endif 7057ac27a0ecSDave Kleikamp 7058c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 705924b58424STheodore Ts'o static inline void register_as_ext2(void) 706024b58424STheodore Ts'o { 706124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 706224b58424STheodore Ts'o if (err) 706324b58424STheodore Ts'o printk(KERN_WARNING 706424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 706524b58424STheodore Ts'o } 706624b58424STheodore Ts'o 706724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 706824b58424STheodore Ts'o { 706924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 707024b58424STheodore Ts'o } 70712035e776STheodore Ts'o 70722035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 70732035e776STheodore Ts'o { 7074e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 70752035e776STheodore Ts'o return 0; 7076bc98a42cSDavid Howells if (sb_rdonly(sb)) 70772035e776STheodore Ts'o return 1; 7078e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 70792035e776STheodore Ts'o return 0; 70802035e776STheodore Ts'o return 1; 70812035e776STheodore Ts'o } 708224b58424STheodore Ts'o #else 708324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 708424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 70852035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 708624b58424STheodore Ts'o #endif 708724b58424STheodore Ts'o 708824b58424STheodore Ts'o static inline void register_as_ext3(void) 708924b58424STheodore Ts'o { 709024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 709124b58424STheodore Ts'o if (err) 709224b58424STheodore Ts'o printk(KERN_WARNING 709324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 709424b58424STheodore Ts'o } 709524b58424STheodore Ts'o 709624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 709724b58424STheodore Ts'o { 709824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 709924b58424STheodore Ts'o } 71002035e776STheodore Ts'o 71012035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 71022035e776STheodore Ts'o { 7103e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 71042035e776STheodore Ts'o return 0; 7105e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 71062035e776STheodore Ts'o return 0; 7107bc98a42cSDavid Howells if (sb_rdonly(sb)) 71082035e776STheodore Ts'o return 1; 7109e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 71102035e776STheodore Ts'o return 0; 71112035e776STheodore Ts'o return 1; 71122035e776STheodore Ts'o } 711324b58424STheodore Ts'o 711403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7115ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 711603010a33STheodore Ts'o .name = "ext4", 7117cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7118cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7119ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 712014f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7121ac27a0ecSDave Kleikamp }; 71227f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7123ac27a0ecSDave Kleikamp 7124e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7125e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7126e9e3bcecSEric Sandeen 71275dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7128ac27a0ecSDave Kleikamp { 7129e9e3bcecSEric Sandeen int i, err; 7130c9de560dSAlex Tomas 7131e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 713207c0c5d8SAl Viro ext4_li_info = NULL; 713307c0c5d8SAl Viro 71349a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 713512e9b892SDmitry Monakhov ext4_check_flag_values(); 7136e9e3bcecSEric Sandeen 7137e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7138e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7139e9e3bcecSEric Sandeen 714051865fdaSZheng Liu err = ext4_init_es(); 71416fd058f7STheodore Ts'o if (err) 71426fd058f7STheodore Ts'o return err; 714351865fdaSZheng Liu 71441dc0aa46SEric Whitney err = ext4_init_pending(); 71451dc0aa46SEric Whitney if (err) 714622cfe4b4SEric Biggers goto out7; 714722cfe4b4SEric Biggers 714822cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 714922cfe4b4SEric Biggers if (err) 71501dc0aa46SEric Whitney goto out6; 71511dc0aa46SEric Whitney 715251865fdaSZheng Liu err = ext4_init_pageio(); 715351865fdaSZheng Liu if (err) 7154b5799018STheodore Ts'o goto out5; 715551865fdaSZheng Liu 71565dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7157bd2d0210STheodore Ts'o if (err) 7158b5799018STheodore Ts'o goto out4; 7159857ac889SLukas Czerner 7160b5799018STheodore Ts'o err = ext4_init_sysfs(); 7161dd68314cSTheodore Ts'o if (err) 7162b5799018STheodore Ts'o goto out3; 7163857ac889SLukas Czerner 71645dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7165ac27a0ecSDave Kleikamp if (err) 7166c9de560dSAlex Tomas goto out2; 7167ac27a0ecSDave Kleikamp err = init_inodecache(); 7168ac27a0ecSDave Kleikamp if (err) 7169ac27a0ecSDave Kleikamp goto out1; 7170aa75f4d3SHarshad Shirwadkar 7171aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7172aa75f4d3SHarshad Shirwadkar if (err) 7173aa75f4d3SHarshad Shirwadkar goto out05; 7174aa75f4d3SHarshad Shirwadkar 717524b58424STheodore Ts'o register_as_ext3(); 71762035e776STheodore Ts'o register_as_ext2(); 717703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7178ac27a0ecSDave Kleikamp if (err) 7179ac27a0ecSDave Kleikamp goto out; 7180bfff6873SLukas Czerner 7181ac27a0ecSDave Kleikamp return 0; 7182ac27a0ecSDave Kleikamp out: 718324b58424STheodore Ts'o unregister_as_ext2(); 718424b58424STheodore Ts'o unregister_as_ext3(); 7185ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7186aa75f4d3SHarshad Shirwadkar out05: 7187ac27a0ecSDave Kleikamp destroy_inodecache(); 7188ac27a0ecSDave Kleikamp out1: 71895dabfc78STheodore Ts'o ext4_exit_mballoc(); 71909c191f70ST Makphaibulchoke out2: 7191b5799018STheodore Ts'o ext4_exit_sysfs(); 7192b5799018STheodore Ts'o out3: 7193dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7194b5799018STheodore Ts'o out4: 71955dabfc78STheodore Ts'o ext4_exit_pageio(); 7196b5799018STheodore Ts'o out5: 719722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 71981dc0aa46SEric Whitney out6: 719922cfe4b4SEric Biggers ext4_exit_pending(); 720022cfe4b4SEric Biggers out7: 720151865fdaSZheng Liu ext4_exit_es(); 720251865fdaSZheng Liu 7203ac27a0ecSDave Kleikamp return err; 7204ac27a0ecSDave Kleikamp } 7205ac27a0ecSDave Kleikamp 72065dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7207ac27a0ecSDave Kleikamp { 7208bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 720924b58424STheodore Ts'o unregister_as_ext2(); 721024b58424STheodore Ts'o unregister_as_ext3(); 721103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7212ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7213ac27a0ecSDave Kleikamp destroy_inodecache(); 72145dabfc78STheodore Ts'o ext4_exit_mballoc(); 7215b5799018STheodore Ts'o ext4_exit_sysfs(); 72165dabfc78STheodore Ts'o ext4_exit_system_zone(); 72175dabfc78STheodore Ts'o ext4_exit_pageio(); 721822cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7219dd12ed14SEric Sandeen ext4_exit_es(); 72201dc0aa46SEric Whitney ext4_exit_pending(); 7221ac27a0ecSDave Kleikamp } 7222ac27a0ecSDave Kleikamp 7223ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 722483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7225ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 72267ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 72275dabfc78STheodore Ts'o module_init(ext4_init_fs) 72285dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7229