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 1202857ac889SLukas Czerner ext4_unregister_li_request(sb); 1203957153fcSJan Kara ext4_quota_off_umount(sb); 1204e0ccfd95SChristoph Hellwig 1205c92dc856SJan Kara flush_work(&sbi->s_error_work); 12062e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 120702f310fcSJan Kara ext4_release_orphan_info(sb); 12084c0425ffSMingming Cao 12095e47868fSRitesh Harjani /* 12105e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 12115e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 12125e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 12135e47868fSRitesh Harjani */ 12145e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 12155e47868fSRitesh Harjani 12160390131bSFrank Mayhar if (sbi->s_journal) { 121797abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1218ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 121947b4a50bSJan Kara sbi->s_journal = NULL; 1220878520acSTheodore Ts'o if ((err < 0) && !aborted) { 122154d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12220390131bSFrank Mayhar } 1223878520acSTheodore Ts'o } 1224d4edac31SJosef Bacik 1225d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12269105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1227d4edac31SJosef Bacik ext4_release_system_zone(sb); 1228d4edac31SJosef Bacik ext4_mb_release(sb); 1229d4edac31SJosef Bacik ext4_ext_release(sb); 1230d4edac31SJosef Bacik 1231bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1232e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 123302f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1234ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1235ac27a0ecSDave Kleikamp } 1236bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12374392fbc4SJan Kara ext4_commit_super(sb); 1238a8e25a83SArtem Bityutskiy 12391d0c3924STheodore Ts'o rcu_read_lock(); 12401d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1241ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12421d0c3924STheodore Ts'o brelse(group_desc[i]); 12431d0c3924STheodore Ts'o kvfree(group_desc); 12447c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12457c990728SSuraj Jitindar Singh if (flex_groups) { 12467c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12477c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12487c990728SSuraj Jitindar Singh kvfree(flex_groups); 12497c990728SSuraj Jitindar Singh } 12501d0c3924STheodore Ts'o rcu_read_unlock(); 125157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1252ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1253ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 125457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1255efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1256bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1257ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1258a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 125933458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1260ac27a0ecSDave Kleikamp #endif 1261ac27a0ecSDave Kleikamp 1262ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1263ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1264ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1265ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1266ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1267ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1268837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1269ac27a0ecSDave Kleikamp 127089d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1271f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1272ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1273ac27a0ecSDave Kleikamp /* 1274ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1275ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1276ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1277ac27a0ecSDave Kleikamp */ 1278ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1279ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1280617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1281ac27a0ecSDave Kleikamp } 128250c15df6SChengguang Xu 1283dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1284dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 128550c15df6SChengguang Xu 128647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 128747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 128850c15df6SChengguang Xu 1289618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1290618f0031SPavel Skripkin 12919060dd2cSEric Sandeen brelse(sbi->s_sbh); 1292ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12933197ebdbSTheodore Ts'o /* 12943197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12953197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12963197ebdbSTheodore Ts'o */ 12973197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12983197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12990441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13000441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1301705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13025e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1303ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13045298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1305f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1306c83ad55eSGabriel Krisman Bertazi #endif 1307ac27a0ecSDave Kleikamp kfree(sbi); 1308ac27a0ecSDave Kleikamp } 1309ac27a0ecSDave Kleikamp 1310e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1311ac27a0ecSDave Kleikamp 1312ac27a0ecSDave Kleikamp /* 1313ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1314ac27a0ecSDave Kleikamp */ 1315617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1316ac27a0ecSDave Kleikamp { 1317617ba13bSMingming Cao struct ext4_inode_info *ei; 1318ac27a0ecSDave Kleikamp 1319e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1320ac27a0ecSDave Kleikamp if (!ei) 1321ac27a0ecSDave Kleikamp return NULL; 13220b8e58a1SAndreas Dilger 1323ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1324202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1325c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 132627bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1327c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13289a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13299a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1330edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1331eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1332edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1333dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1334d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1335d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13361dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1337a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1338a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 133996c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1340a9e7f447SDmitry Monakhov #endif 13418aefcd55STheodore Ts'o ei->jinode = NULL; 13422e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1343744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1344b436b9beSJan Kara ei->i_sync_tid = 0; 1345b436b9beSJan Kara ei->i_datasync_tid = 0; 1346e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13472e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1348aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1349aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1350ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1351ac27a0ecSDave Kleikamp } 1352ac27a0ecSDave Kleikamp 13537ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13547ff9c073STheodore Ts'o { 13557ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13567ff9c073STheodore Ts'o 135729b3692eSEric Biggers if (!drop) 135829b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 135929b3692eSEric Biggers 13607ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13617ff9c073STheodore Ts'o return drop; 13627ff9c073STheodore Ts'o } 13637ff9c073STheodore Ts'o 136494053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1365fa0d7e3dSNick Piggin { 13662c58d548SEric Biggers fscrypt_free_inode(inode); 1367aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1368aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1369aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1370aa75f4d3SHarshad Shirwadkar } 1371fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1372fa0d7e3dSNick Piggin } 1373fa0d7e3dSNick Piggin 1374617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1375ac27a0ecSDave Kleikamp { 13769f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1377b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1378b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1379b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13809f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13819f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13829f7dd93dSVasily Averin true); 13839f7dd93dSVasily Averin dump_stack(); 13849f7dd93dSVasily Averin } 13856fed8395SJeffle Xu 13866fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13876fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13886fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13896fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13906fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1391ac27a0ecSDave Kleikamp } 1392ac27a0ecSDave Kleikamp 139351cc5068SAlexey Dobriyan static void init_once(void *foo) 1394ac27a0ecSDave Kleikamp { 1395617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1396ac27a0ecSDave Kleikamp 1397ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1398ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13990e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1400ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1401aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1402ac27a0ecSDave Kleikamp } 1403ac27a0ecSDave Kleikamp 1404e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1405ac27a0ecSDave Kleikamp { 1406f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1407f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1408f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1409f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1410f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1411f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 141220c2df83SPaul Mundt init_once); 1413617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1414ac27a0ecSDave Kleikamp return -ENOMEM; 1415ac27a0ecSDave Kleikamp return 0; 1416ac27a0ecSDave Kleikamp } 1417ac27a0ecSDave Kleikamp 1418ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1419ac27a0ecSDave Kleikamp { 14208c0a8537SKirill A. Shutemov /* 14218c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14228c0a8537SKirill A. Shutemov * destroy cache. 14238c0a8537SKirill A. Shutemov */ 14248c0a8537SKirill A. Shutemov rcu_barrier(); 1425617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1426ac27a0ecSDave Kleikamp } 1427ac27a0ecSDave Kleikamp 14280930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1429ac27a0ecSDave Kleikamp { 1430aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14310930fcc1SAl Viro invalidate_inode_buffers(inode); 1432dbd5768fSJan Kara clear_inode(inode); 143327bc446eSbrookxu ext4_discard_preallocations(inode, 0); 143451865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1435f4c2d372SJan Kara dquot_drop(inode); 14368aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14378aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14388aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14398aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14408aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14418aefcd55STheodore Ts'o } 14423d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1443c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1444ac27a0ecSDave Kleikamp } 1445ac27a0ecSDave Kleikamp 14461b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14471b961ac0SChristoph Hellwig u64 ino, u32 generation) 1448ac27a0ecSDave Kleikamp { 1449ac27a0ecSDave Kleikamp struct inode *inode; 1450ac27a0ecSDave Kleikamp 14518a363970STheodore Ts'o /* 1452ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1453ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1454ac27a0ecSDave Kleikamp */ 14558a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14561d1fe1eeSDavid Howells if (IS_ERR(inode)) 14571d1fe1eeSDavid Howells return ERR_CAST(inode); 14581d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1459ac27a0ecSDave Kleikamp iput(inode); 1460ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1461ac27a0ecSDave Kleikamp } 14621b961ac0SChristoph Hellwig 14631b961ac0SChristoph Hellwig return inode; 1464ac27a0ecSDave Kleikamp } 14651b961ac0SChristoph Hellwig 14661b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14671b961ac0SChristoph Hellwig int fh_len, int fh_type) 14681b961ac0SChristoph Hellwig { 14691b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14701b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14711b961ac0SChristoph Hellwig } 14721b961ac0SChristoph Hellwig 14731b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14741b961ac0SChristoph Hellwig int fh_len, int fh_type) 14751b961ac0SChristoph Hellwig { 14761b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14771b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1478ac27a0ecSDave Kleikamp } 1479ac27a0ecSDave Kleikamp 1480fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1481fde87268STheodore Ts'o { 1482fde87268STheodore Ts'o struct writeback_control wbc = { 1483fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1484fde87268STheodore Ts'o }; 1485fde87268STheodore Ts'o 1486fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1487fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1488fde87268STheodore Ts'o } 1489fde87268STheodore Ts'o 1490643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1491a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1492a7550b30SJaegeuk Kim { 1493a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1494a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1495a7550b30SJaegeuk Kim } 1496a7550b30SJaegeuk Kim 1497a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1498a7550b30SJaegeuk Kim void *fs_data) 1499a7550b30SJaegeuk Kim { 15002f8f5e76SEric Biggers handle_t *handle = fs_data; 1501c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1502a7550b30SJaegeuk Kim 15039ce0151aSEric Biggers /* 15049ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 15059ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 15069ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 15079ce0151aSEric Biggers * the filename "lost+found" itself. 15089ce0151aSEric Biggers */ 15099ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 15109ce0151aSEric Biggers return -EPERM; 1511a7550b30SJaegeuk Kim 15127d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 15137d3e06a8SRoss Zwisler return -EINVAL; 15147d3e06a8SRoss Zwisler 1515b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1516b383a73fSIra Weiny return -EOPNOTSUPP; 1517b383a73fSIra Weiny 151894840e3cSEric Biggers res = ext4_convert_inline_data(inode); 151994840e3cSEric Biggers if (res) 152094840e3cSEric Biggers return res; 152194840e3cSEric Biggers 15222f8f5e76SEric Biggers /* 15232f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15242f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15252f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15262f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15272f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15282f8f5e76SEric Biggers */ 15292f8f5e76SEric Biggers 15302f8f5e76SEric Biggers if (handle) { 15312f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15322f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15332f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15342f8f5e76SEric Biggers ctx, len, 0); 1535a7550b30SJaegeuk Kim if (!res) { 1536a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1537a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1538a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1539a3caa24bSJan Kara /* 15402ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15412ee6a576SEric Biggers * S_DAX may be disabled 1542a3caa24bSJan Kara */ 1543043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1544a7550b30SJaegeuk Kim } 1545a7550b30SJaegeuk Kim return res; 1546a7550b30SJaegeuk Kim } 1547a7550b30SJaegeuk Kim 1548b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1549b8cb5a54STahsin Erdogan if (res) 1550b8cb5a54STahsin Erdogan return res; 15512f8f5e76SEric Biggers retry: 1552af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1553af65207cSTahsin Erdogan &credits); 1554dec214d0STahsin Erdogan if (res) 1555dec214d0STahsin Erdogan return res; 1556dec214d0STahsin Erdogan 1557c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1558a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1559a7550b30SJaegeuk Kim return PTR_ERR(handle); 1560a7550b30SJaegeuk Kim 15612f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15622f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15632f8f5e76SEric Biggers ctx, len, 0); 1564a7550b30SJaegeuk Kim if (!res) { 1565a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15662ee6a576SEric Biggers /* 15672ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15682ee6a576SEric Biggers * S_DAX may be disabled 15692ee6a576SEric Biggers */ 1570043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1571a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1572a7550b30SJaegeuk Kim if (res) 1573a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1574a7550b30SJaegeuk Kim } 1575a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15762f8f5e76SEric Biggers 15772f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15782f8f5e76SEric Biggers goto retry; 1579a7550b30SJaegeuk Kim if (!res) 1580a7550b30SJaegeuk Kim res = res2; 1581a7550b30SJaegeuk Kim return res; 1582a7550b30SJaegeuk Kim } 1583a7550b30SJaegeuk Kim 1584ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1585a7550b30SJaegeuk Kim { 1586ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1587a7550b30SJaegeuk Kim } 1588a7550b30SJaegeuk Kim 1589b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1590b925acb8SEric Biggers { 1591b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1592b925acb8SEric Biggers } 1593b925acb8SEric Biggers 1594b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1595b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1596b925acb8SEric Biggers { 1597b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1598b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1599b925acb8SEric Biggers } 1600b925acb8SEric Biggers 16016f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1602a5d431efSEric Biggers .key_prefix = "ext4:", 1603a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1604a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1605ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1606a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1607b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1608b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1609a7550b30SJaegeuk Kim }; 1610a7550b30SJaegeuk Kim #endif 1611a7550b30SJaegeuk Kim 1612ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1613d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1614689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1615ac27a0ecSDave Kleikamp 1616617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1617617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1618617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1619617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1620617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16216f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16228c54ca9cSAl Viro const struct path *path); 1623617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1624ac27a0ecSDave Kleikamp size_t len, loff_t off); 1625617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1626ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16277c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16287c319d32SAditya Kali unsigned int flags); 1629ac27a0ecSDave Kleikamp 163096c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 163196c7e0d9SJan Kara { 163296c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 163396c7e0d9SJan Kara } 163496c7e0d9SJan Kara 163561e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 163660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1637617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1638617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1639617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1640617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1641a5b5ee32SJan Kara .write_info = ext4_write_info, 1642a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1643a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1644040cb378SLi Xi .get_projid = ext4_get_projid, 16457a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1646ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1647ac27a0ecSDave Kleikamp }; 1648ac27a0ecSDave Kleikamp 16490d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1650617ba13bSMingming Cao .quota_on = ext4_quota_on, 1651ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1652287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16530a240339SJan Kara .get_state = dquot_get_state, 1654287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1655287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16566332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16576332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1658ac27a0ecSDave Kleikamp }; 1659ac27a0ecSDave Kleikamp #endif 1660ac27a0ecSDave Kleikamp 1661ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1662617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 166394053139SAl Viro .free_inode = ext4_free_in_core_inode, 1664617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1665617ba13bSMingming Cao .write_inode = ext4_write_inode, 1666617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16677ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16680930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1669617ba13bSMingming Cao .put_super = ext4_put_super, 1670617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1671c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1672c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1673617ba13bSMingming Cao .statfs = ext4_statfs, 1674617ba13bSMingming Cao .show_options = ext4_show_options, 1675ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1676617ba13bSMingming Cao .quota_read = ext4_quota_read, 1677617ba13bSMingming Cao .quota_write = ext4_quota_write, 167896c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1679ac27a0ecSDave Kleikamp #endif 1680ac27a0ecSDave Kleikamp }; 1681ac27a0ecSDave Kleikamp 168239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16831b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16841b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1685617ba13bSMingming Cao .get_parent = ext4_get_parent, 1686fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1687ac27a0ecSDave Kleikamp }; 1688ac27a0ecSDave Kleikamp 1689ac27a0ecSDave Kleikamp enum { 1690ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1691ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 169272578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1693ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 169472578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1695ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1696ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1697ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16986ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16994f74d15fSEric Biggers Opt_inlinecrypt, 1700ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1701ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 17029cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 17039cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1704327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 17054437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 17061449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 17075328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1708744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1709fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1710cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 171121175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1712e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17138016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 171499c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17158016e29fSHarshad Shirwadkar #endif 1716ac27a0ecSDave Kleikamp }; 1717ac27a0ecSDave Kleikamp 1718e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1719ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1720ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1721ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1722e5a185c2SLukas Czerner {} 1723e5a185c2SLukas Czerner }; 1724e5a185c2SLukas Czerner 1725e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1726ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1727ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1728ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1729e5a185c2SLukas Czerner {} 1730e5a185c2SLukas Czerner }; 1731e5a185c2SLukas Czerner 1732e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1733e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1734e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1735e5a185c2SLukas Czerner {} 1736e5a185c2SLukas Czerner }; 1737e5a185c2SLukas Czerner 1738e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1739ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1740ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1741ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1742e5a185c2SLukas Czerner {} 1743e5a185c2SLukas Czerner }; 1744e5a185c2SLukas Czerner 1745e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1746e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1747e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1748e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1749e5a185c2SLukas Czerner {} 1750e5a185c2SLukas Czerner }; 1751e5a185c2SLukas Czerner 1752e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1753e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1754e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1755e5a185c2SLukas Czerner 1756e5a185c2SLukas Czerner /* 1757e5a185c2SLukas Czerner * Mount option specification 1758e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1759e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1760e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1761e5a185c2SLukas Czerner * separate for now. 1762e5a185c2SLukas Czerner */ 1763e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1764e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1765e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1766e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1767e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1768e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1769e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1770e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1771e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1772e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1773e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1774e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1775e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1776e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1777e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1778e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1779e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1780e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1781e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1782e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1783e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1784e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1785e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1786e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1787e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1788e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1789e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1790e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1791e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1792e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1793e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1794e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1795e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1796e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1797e5a185c2SLukas Czerner ext4_param_data_err), 1798e5a185c2SLukas Czerner fsparam_string_empty 1799e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1800e5a185c2SLukas Czerner fsparam_string_empty 1801e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1802e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1803e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1804e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1805e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1806e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1807e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1808e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1809e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1810e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1811e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1812e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1813e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1814e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1815e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1816e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1817e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1818e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1819e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1820e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1821e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1822e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1823e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1824e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1825e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1826e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1827e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1828e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1829e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1830e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1831e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1832e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1833e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1834e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1835e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1836e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1837e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1838e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1839e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1840e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1841e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1842e5a185c2SLukas Czerner #endif 1843e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1844e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1845e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1846e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1847e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1848e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1849e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1850e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1851e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1852e5a185c2SLukas Czerner Opt_removed), 1853e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1854e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1855e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1856e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1857e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1858e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1859e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1860e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1861e5a185c2SLukas Czerner {} 1862e5a185c2SLukas Czerner }; 1863e5a185c2SLukas Czerner 1864b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1865196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1866196e402aSHarshad Shirwadkar 1867d6006186SEric Biggers static const char deprecated_msg[] = 1868d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1869437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1870b3881f74STheodore Ts'o 187126092bf5STheodore Ts'o #define MOPT_SET 0x0001 187226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 187326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 187426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 187526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 187626092bf5STheodore Ts'o #define MOPT_Q 0 1877ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 187826092bf5STheodore Ts'o #else 187926092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 188026092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 188126092bf5STheodore Ts'o #endif 1882ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1883ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18848dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1885ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1886ba2e524dSLukas Czerner #define MOPT_2 0x0100 188726092bf5STheodore Ts'o 188826092bf5STheodore Ts'o static const struct mount_opts { 188926092bf5STheodore Ts'o int token; 189026092bf5STheodore Ts'o int mount_opt; 189126092bf5STheodore Ts'o int flags; 189226092bf5STheodore Ts'o } ext4_mount_opts[] = { 189326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 189426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 189526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 189626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 189726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 189826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 18998dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 19008dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 19018dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 19028dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 190326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 190426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 19058dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 19068dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19078dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 190859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1909327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1910327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1911c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1912c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 19138dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 19141e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 191526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 19168dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 19171e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19188dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1919ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 192026092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 192126092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 192226092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 192326092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 192426092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1925ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1926ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1927ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1928ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1929ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 193026092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 193126092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 193226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 193326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 193426092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 193526092bf5STheodore Ts'o #else 193626092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 193726092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 193826092bf5STheodore Ts'o #endif 193926092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 194026092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 194126092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 194226092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 194326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 194426092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 194526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 194649da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 194749da9392SJan Kara MOPT_SET | MOPT_Q}, 194826092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 194949da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 195049da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1951ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1952ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1953ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1954cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 195521175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 19563d392b26STheodore Ts'o MOPT_SET}, 195799c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 19580f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 19590f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 19608016e29fSHarshad Shirwadkar #endif 196126092bf5STheodore Ts'o {Opt_err, 0, 0} 196226092bf5STheodore Ts'o }; 196326092bf5STheodore Ts'o 19645298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1965c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1966c83ad55eSGabriel Krisman Bertazi __u16 magic; 1967c83ad55eSGabriel Krisman Bertazi char *name; 196849bd03ccSChristoph Hellwig unsigned int version; 1969c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 197049bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1971c83ad55eSGabriel Krisman Bertazi }; 1972c83ad55eSGabriel Krisman Bertazi 1973aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1974aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1975c83ad55eSGabriel Krisman Bertazi { 1976c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1977c83ad55eSGabriel Krisman Bertazi int i; 1978c83ad55eSGabriel Krisman Bertazi 1979c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1980c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1981aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1982c83ad55eSGabriel Krisman Bertazi 1983aa8bf298SChristoph Hellwig return NULL; 1984c83ad55eSGabriel Krisman Bertazi } 1985c83ad55eSGabriel Krisman Bertazi #endif 1986c83ad55eSGabriel Krisman Bertazi 19876e47a3ccSLukas Czerner static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg) 1988ed318a6cSEric Biggers { 1989ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 1990ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 1991ed318a6cSEric Biggers int err; 1992ed318a6cSEric Biggers 19936e47a3ccSLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, arg, 1994ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 1995ed318a6cSEric Biggers if (err) { 1996ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 19976e47a3ccSLukas Czerner "Error while setting test dummy encryption [%d]", err); 19986e47a3ccSLukas Czerner return err; 1999ed318a6cSEric Biggers } 2000ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2001ed318a6cSEric Biggers #endif 20026e47a3ccSLukas Czerner return 0; 2003ed318a6cSEric Biggers } 2004ed318a6cSEric Biggers 20056e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 20066e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 20076e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 20086e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 20096e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 20106e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 20116e47a3ccSLukas Czerner #define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6) 20126e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 20136e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 20146e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 20156e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 20166e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 20176e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 20186e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 20196e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 20206e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 20216e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 20226e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 20237edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 20246e47a3ccSLukas Czerner 2025461c3af0SLukas Czerner struct ext4_fs_context { 2026e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 20276e47a3ccSLukas Czerner char *test_dummy_enc_arg; 2028e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 2029196e402aSHarshad Shirwadkar int mb_optimize_scan; 20306e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 20316e47a3ccSLukas Czerner int s_fc_debug_max_replay; 20326e47a3ccSLukas Czerner #endif 20336e47a3ccSLukas Czerner unsigned short qname_spec; 20346e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 20356e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 20366e47a3ccSLukas Czerner unsigned long journal_devnum; 20376e47a3ccSLukas Czerner unsigned long s_commit_interval; 20386e47a3ccSLukas Czerner unsigned long s_stripe; 20396e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 20406e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 20416e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 20426e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 20436e47a3ccSLukas Czerner unsigned int journal_ioprio; 20446e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 20456e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 20466e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 20476e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 2048e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 2049e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 2050b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 20516e47a3ccSLukas Czerner unsigned int spec; 20526e47a3ccSLukas Czerner u32 s_max_batch_time; 20536e47a3ccSLukas Czerner u32 s_min_batch_time; 20546e47a3ccSLukas Czerner kuid_t s_resuid; 20556e47a3ccSLukas Czerner kgid_t s_resgid; 20567edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 2057b237e304SHarshad Shirwadkar }; 2058b237e304SHarshad Shirwadkar 2059cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 2060cebe85d5SLukas Czerner { 2061cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2062cebe85d5SLukas Czerner int i; 2063cebe85d5SLukas Czerner 2064cebe85d5SLukas Czerner if (!ctx) 2065cebe85d5SLukas Czerner return; 2066cebe85d5SLukas Czerner 2067cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 2068cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 2069cebe85d5SLukas Czerner 2070cebe85d5SLukas Czerner kfree(ctx->test_dummy_enc_arg); 2071cebe85d5SLukas Czerner kfree(ctx); 2072cebe85d5SLukas Czerner } 2073cebe85d5SLukas Czerner 2074cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 2075cebe85d5SLukas Czerner { 2076da9e4802SDan Carpenter struct ext4_fs_context *ctx; 2077cebe85d5SLukas Czerner 2078cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 2079cebe85d5SLukas Czerner if (!ctx) 2080cebe85d5SLukas Czerner return -ENOMEM; 2081cebe85d5SLukas Czerner 2082cebe85d5SLukas Czerner fc->fs_private = ctx; 2083cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 2084cebe85d5SLukas Czerner 2085cebe85d5SLukas Czerner return 0; 2086cebe85d5SLukas Czerner } 2087cebe85d5SLukas Czerner 2088e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2089e6e268cbSLukas Czerner /* 2090e6e268cbSLukas Czerner * Note the name of the specified quota file. 2091e6e268cbSLukas Czerner */ 2092e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2093e6e268cbSLukas Czerner struct fs_parameter *param) 2094e6e268cbSLukas Czerner { 2095e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2096e6e268cbSLukas Czerner char *qname; 2097e6e268cbSLukas Czerner 2098e6e268cbSLukas Czerner if (param->size < 1) { 2099e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2100e6e268cbSLukas Czerner return -EINVAL; 2101e6e268cbSLukas Czerner } 2102e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2103e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2104e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2105e6e268cbSLukas Czerner return -EINVAL; 2106e6e268cbSLukas Czerner } 2107e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2108e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2109e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2110e6e268cbSLukas Czerner "%s quota file already specified", 2111e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2112e6e268cbSLukas Czerner return -EINVAL; 2113e6e268cbSLukas Czerner } 2114e6e268cbSLukas Czerner return 0; 2115e6e268cbSLukas Czerner } 2116e6e268cbSLukas Czerner 2117e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2118e6e268cbSLukas Czerner if (!qname) { 2119e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2120e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2121e6e268cbSLukas Czerner return -ENOMEM; 2122e6e268cbSLukas Czerner } 2123e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2124e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 21256e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2126e6e268cbSLukas Czerner return 0; 2127e6e268cbSLukas Czerner } 2128e6e268cbSLukas Czerner 2129e6e268cbSLukas Czerner /* 2130e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2131e6e268cbSLukas Czerner */ 2132e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2133e6e268cbSLukas Czerner { 2134e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2135e6e268cbSLukas Czerner 2136e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2137e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2138e6e268cbSLukas Czerner 2139e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2140e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 21416e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2142e6e268cbSLukas Czerner return 0; 2143e6e268cbSLukas Czerner } 2144e6e268cbSLukas Czerner #endif 2145e6e268cbSLukas Czerner 21466e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 21474c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 21484c246728SLukas Czerner unsigned long flag) \ 21496e47a3ccSLukas Czerner { \ 21506e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21516e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2152e3952fccSLukas Czerner } 2153e3952fccSLukas Czerner 2154e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 21554c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 21564c246728SLukas Czerner unsigned long flag) \ 21576e47a3ccSLukas Czerner { \ 21586e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21596e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2160e3952fccSLukas Czerner } 2161e3952fccSLukas Czerner 2162e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 21634c246728SLukas Czerner static inline unsigned long \ 21644c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 21656e47a3ccSLukas Czerner { \ 21664c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2167e3952fccSLukas Czerner } 21686e47a3ccSLukas Czerner 2169e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 21706e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2171e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2172e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 21736e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2174e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2175e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2176e3952fccSLukas Czerner 2177e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2178e3952fccSLukas Czerner { 2179e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2180e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2181e3952fccSLukas Czerner } 21826e47a3ccSLukas Czerner 218302f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 218426092bf5STheodore Ts'o { 2185461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2186461c3af0SLukas Czerner struct fs_parse_result result; 218726092bf5STheodore Ts'o const struct mount_opts *m; 2188461c3af0SLukas Czerner int is_remount; 218908cefc7aSEric W. Biederman kuid_t uid; 219008cefc7aSEric W. Biederman kgid_t gid; 2191461c3af0SLukas Czerner int token; 2192461c3af0SLukas Czerner 2193461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2194461c3af0SLukas Czerner if (token < 0) 2195461c3af0SLukas Czerner return token; 2196461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 219726092bf5STheodore Ts'o 2198ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2199ba2e524dSLukas Czerner if (token == m->token) 2200ba2e524dSLukas Czerner break; 2201ba2e524dSLukas Czerner 2202ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2203ba2e524dSLukas Czerner 2204ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2205ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2206ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2207ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2208ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2209ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2210ba2e524dSLukas Czerner } else 2211ba2e524dSLukas Czerner return -EINVAL; 2212ba2e524dSLukas Czerner } 2213ba2e524dSLukas Czerner 2214ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2215ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2216ba2e524dSLukas Czerner param->key); 2217ba2e524dSLukas Czerner return 0; 2218ba2e524dSLukas Czerner } 2219ba2e524dSLukas Czerner 2220ba2e524dSLukas Czerner switch (token) { 222157f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2222ba2e524dSLukas Czerner case Opt_usrjquota: 2223461c3af0SLukas Czerner if (!*param->string) 2224e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2225461c3af0SLukas Czerner else 2226e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2227ba2e524dSLukas Czerner case Opt_grpjquota: 2228461c3af0SLukas Czerner if (!*param->string) 2229e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2230461c3af0SLukas Czerner else 2231e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 223257f73c2cSTheodore Ts'o #endif 2233f7048605STheodore Ts'o case Opt_noacl: 2234f7048605STheodore Ts'o case Opt_nouser_xattr: 2235da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2236f7048605STheodore Ts'o break; 223726092bf5STheodore Ts'o case Opt_sb: 22387edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 22397edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 22407edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 22417edfd85bSLukas Czerner } else { 22427edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 22437edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 22447edfd85bSLukas Czerner } 224502f960f8SLukas Czerner return 0; 224626092bf5STheodore Ts'o case Opt_removed: 2247da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2248461c3af0SLukas Czerner param->key); 224902f960f8SLukas Czerner return 0; 225026092bf5STheodore Ts'o case Opt_abort: 2251e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 225202f960f8SLukas Czerner return 0; 225326092bf5STheodore Ts'o case Opt_i_version: 2254960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "5.20"); 2255960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Use iversion instead\n"); 22566e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 225702f960f8SLukas Czerner return 0; 22584f74d15fSEric Biggers case Opt_inlinecrypt: 22594f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 22606e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 22614f74d15fSEric Biggers #else 2262da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 22634f74d15fSEric Biggers #endif 226402f960f8SLukas Czerner return 0; 2265461c3af0SLukas Czerner case Opt_errors: 22666e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2267ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2268ba2e524dSLukas Czerner return 0; 2269ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2270ba2e524dSLukas Czerner case Opt_jqfmt: 2271ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2272ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2273ba2e524dSLukas Czerner return 0; 2274ba2e524dSLukas Czerner #endif 2275ba2e524dSLukas Czerner case Opt_data: 2276ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2277ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2278ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2279ba2e524dSLukas Czerner return 0; 2280ba2e524dSLukas Czerner case Opt_commit: 2281461c3af0SLukas Czerner if (result.uint_32 == 0) 22826e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2283461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2284da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22859ba55543Szhangyi (F) "Invalid commit interval %d, " 22869ba55543Szhangyi (F) "must be smaller than %d", 2287461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2288da812f61SLukas Czerner return -EINVAL; 22899ba55543Szhangyi (F) } 22906e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22916e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2292ba2e524dSLukas Czerner return 0; 2293ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22946e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2295da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2296461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2297da812f61SLukas Czerner return -EINVAL; 22989803387cSTheodore Ts'o } 22996e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 23006e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2301ba2e524dSLukas Czerner return 0; 2302ba2e524dSLukas Czerner case Opt_max_batch_time: 23036e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 23046e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2305ba2e524dSLukas Czerner return 0; 2306ba2e524dSLukas Czerner case Opt_min_batch_time: 23076e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 23086e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2309ba2e524dSLukas Czerner return 0; 2310ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2311461c3af0SLukas Czerner if (result.uint_32 && 2312461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2313461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2314da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2315e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2316e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2317da812f61SLukas Czerner return -EINVAL; 231826092bf5STheodore Ts'o } 23196e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 23206e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2321ba2e524dSLukas Czerner return 0; 2322ba2e524dSLukas Czerner case Opt_init_itable: 23236e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 23246e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2325461c3af0SLukas Czerner if (param->type == fs_value_is_string) 23266e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 23276e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2328ba2e524dSLukas Czerner return 0; 2329ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 23306e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 23316e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2332ba2e524dSLukas Czerner return 0; 23338016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2334ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 23356e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 23366e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2337ba2e524dSLukas Czerner return 0; 23388016e29fSHarshad Shirwadkar #endif 2339ba2e524dSLukas Czerner case Opt_stripe: 23406e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 23416e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2342ba2e524dSLukas Czerner return 0; 2343ba2e524dSLukas Czerner case Opt_resuid: 2344461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 23450efb3b23SJan Kara if (!uid_valid(uid)) { 2346da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2347461c3af0SLukas Czerner result.uint_32); 2348da812f61SLukas Czerner return -EINVAL; 23490efb3b23SJan Kara } 23506e47a3ccSLukas Czerner ctx->s_resuid = uid; 23516e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2352ba2e524dSLukas Czerner return 0; 2353ba2e524dSLukas Czerner case Opt_resgid: 2354461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 23550efb3b23SJan Kara if (!gid_valid(gid)) { 2356da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2357461c3af0SLukas Czerner result.uint_32); 2358da812f61SLukas Czerner return -EINVAL; 23590efb3b23SJan Kara } 23606e47a3ccSLukas Czerner ctx->s_resgid = gid; 23616e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2362ba2e524dSLukas Czerner return 0; 2363ba2e524dSLukas Czerner case Opt_journal_dev: 23640efb3b23SJan Kara if (is_remount) { 2365da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23660efb3b23SJan Kara "Cannot specify journal on remount"); 2367da812f61SLukas Czerner return -EINVAL; 23680efb3b23SJan Kara } 2369461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 23706e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2371ba2e524dSLukas Czerner return 0; 2372ba2e524dSLukas Czerner case Opt_journal_path: 2373ba2e524dSLukas Czerner { 2374ad4eec61SEric Sandeen struct inode *journal_inode; 2375ad4eec61SEric Sandeen struct path path; 2376ad4eec61SEric Sandeen int error; 2377ad4eec61SEric Sandeen 2378ad4eec61SEric Sandeen if (is_remount) { 2379da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2380ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2381da812f61SLukas Czerner return -EINVAL; 2382ad4eec61SEric Sandeen } 2383ad4eec61SEric Sandeen 2384461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2385ad4eec61SEric Sandeen if (error) { 2386da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2387461c3af0SLukas Czerner "journal device path"); 2388da812f61SLukas Czerner return -EINVAL; 2389ad4eec61SEric Sandeen } 2390ad4eec61SEric Sandeen 23912b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2392461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23936e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2394ad4eec61SEric Sandeen path_put(&path); 2395ba2e524dSLukas Czerner return 0; 2396ba2e524dSLukas Czerner } 2397ba2e524dSLukas Czerner case Opt_journal_ioprio: 2398461c3af0SLukas Czerner if (result.uint_32 > 7) { 2399da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 24000efb3b23SJan Kara " (must be 0-7)"); 2401da812f61SLukas Czerner return -EINVAL; 24020efb3b23SJan Kara } 2403461c3af0SLukas Czerner ctx->journal_ioprio = 2404461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 24056e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2406ba2e524dSLukas Czerner return 0; 2407ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 24086e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 24096e47a3ccSLukas Czerner if (param->type == fs_value_is_flag) { 24106e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 24116e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = NULL; 241202f960f8SLukas Czerner return 0; 24136e47a3ccSLukas Czerner } 24146e47a3ccSLukas Czerner if (*param->string && 24156e47a3ccSLukas Czerner !(!strcmp(param->string, "v1") || 24166e47a3ccSLukas Czerner !strcmp(param->string, "v2"))) { 24176e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 24186e47a3ccSLukas Czerner "Value of option \"%s\" is unrecognized", 24196e47a3ccSLukas Czerner param->key); 2420da812f61SLukas Czerner return -EINVAL; 242126092bf5STheodore Ts'o } 24226e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 24236e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size, 24246e47a3ccSLukas Czerner GFP_KERNEL); 24256e47a3ccSLukas Czerner #else 24266e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 24276e47a3ccSLukas Czerner "Test dummy encryption mount option ignored"); 24286e47a3ccSLukas Czerner #endif 2429ba2e524dSLukas Czerner return 0; 2430ba2e524dSLukas Czerner case Opt_dax: 2431ba2e524dSLukas Czerner case Opt_dax_type: 2432ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2433ba2e524dSLukas Czerner { 2434ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2435ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2436ba2e524dSLukas Czerner 2437ba2e524dSLukas Czerner switch (type) { 24389cb20f94SIra Weiny case Opt_dax: 24399cb20f94SIra Weiny case Opt_dax_always: 2440ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24416e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24429cb20f94SIra Weiny break; 24439cb20f94SIra Weiny case Opt_dax_never: 2444ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24456e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24469cb20f94SIra Weiny break; 24479cb20f94SIra Weiny case Opt_dax_inode: 24486e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24496e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24509cb20f94SIra Weiny /* Strictly for printing options */ 2451ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 24529cb20f94SIra Weiny break; 24539cb20f94SIra Weiny } 2454ba2e524dSLukas Czerner return 0; 2455ba2e524dSLukas Czerner } 2456ef83b6e8SDan Williams #else 2457da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2458da812f61SLukas Czerner return -EINVAL; 2459923ae0ffSRoss Zwisler #endif 2460ba2e524dSLukas Czerner case Opt_data_err: 2461ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 24626e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2463ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 24646e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2465ba2e524dSLukas Czerner return 0; 2466ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 2467461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2468da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2469196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2470da812f61SLukas Czerner return -EINVAL; 2471196e402aSHarshad Shirwadkar } 2472461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 2473ba2e524dSLukas Czerner return 0; 2474ba2e524dSLukas Czerner } 2475ba2e524dSLukas Czerner 2476ba2e524dSLukas Czerner /* 2477ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2478ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2479ba2e524dSLukas Czerner */ 2480ba2e524dSLukas Czerner if (m->token == Opt_err) { 2481ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2482ba2e524dSLukas Czerner param->key); 2483ba2e524dSLukas Czerner WARN_ON(1); 2484ba2e524dSLukas Czerner return -EINVAL; 2485ba2e524dSLukas Czerner } 2486ba2e524dSLukas Czerner 2487ba2e524dSLukas Czerner else { 2488461c3af0SLukas Czerner unsigned int set = 0; 2489461c3af0SLukas Czerner 2490461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2491461c3af0SLukas Czerner result.uint_32 > 0) 2492461c3af0SLukas Czerner set = 1; 2493461c3af0SLukas Czerner 249426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2495461c3af0SLukas Czerner set = !set; 249626092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2497da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2498461c3af0SLukas Czerner "buggy handling of option %s", 2499461c3af0SLukas Czerner param->key); 250026092bf5STheodore Ts'o WARN_ON(1); 2501da812f61SLukas Czerner return -EINVAL; 250226092bf5STheodore Ts'o } 2503995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2504461c3af0SLukas Czerner if (set != 0) 25056e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2506995a3ed6SHarshad Shirwadkar else 25076e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2508995a3ed6SHarshad Shirwadkar } else { 2509461c3af0SLukas Czerner if (set != 0) 25106e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 251126092bf5STheodore Ts'o else 25126e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 251326092bf5STheodore Ts'o } 2514995a3ed6SHarshad Shirwadkar } 2515ba2e524dSLukas Czerner 251602f960f8SLukas Czerner return 0; 251726092bf5STheodore Ts'o } 251826092bf5STheodore Ts'o 25197edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2520ac27a0ecSDave Kleikamp { 2521461c3af0SLukas Czerner struct fs_parameter param; 2522461c3af0SLukas Czerner int ret; 2523461c3af0SLukas Czerner char *key; 2524ac27a0ecSDave Kleikamp 2525ac27a0ecSDave Kleikamp if (!options) 25267edfd85bSLukas Czerner return 0; 2527461c3af0SLukas Czerner 2528461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2529461c3af0SLukas Czerner if (*key) { 2530461c3af0SLukas Czerner size_t v_len = 0; 2531461c3af0SLukas Czerner char *value = strchr(key, '='); 2532461c3af0SLukas Czerner 2533461c3af0SLukas Czerner param.type = fs_value_is_flag; 2534461c3af0SLukas Czerner param.string = NULL; 2535461c3af0SLukas Czerner 2536461c3af0SLukas Czerner if (value) { 2537461c3af0SLukas Czerner if (value == key) 2538ac27a0ecSDave Kleikamp continue; 2539461c3af0SLukas Czerner 2540461c3af0SLukas Czerner *value++ = 0; 2541461c3af0SLukas Czerner v_len = strlen(value); 2542461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2543461c3af0SLukas Czerner GFP_KERNEL); 2544461c3af0SLukas Czerner if (!param.string) 25457edfd85bSLukas Czerner return -ENOMEM; 2546461c3af0SLukas Czerner param.type = fs_value_is_string; 2547461c3af0SLukas Czerner } 2548461c3af0SLukas Czerner 2549461c3af0SLukas Czerner param.key = key; 2550461c3af0SLukas Czerner param.size = v_len; 2551461c3af0SLukas Czerner 255202f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2553461c3af0SLukas Czerner if (param.string) 2554461c3af0SLukas Czerner kfree(param.string); 2555461c3af0SLukas Czerner if (ret < 0) 25567edfd85bSLukas Czerner return ret; 2557ac27a0ecSDave Kleikamp } 2558461c3af0SLukas Czerner } 2559461c3af0SLukas Czerner 25607edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2561da812f61SLukas Czerner if (ret < 0) 25627edfd85bSLukas Czerner return ret; 25637edfd85bSLukas Czerner 25647edfd85bSLukas Czerner return 0; 25657edfd85bSLukas Czerner } 25667edfd85bSLukas Czerner 25677edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 25687edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 25697edfd85bSLukas Czerner { 25707edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 25717edfd85bSLukas Czerner char *s_mount_opts = NULL; 25727edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 25737edfd85bSLukas Czerner struct fs_context *fc = NULL; 25747edfd85bSLukas Czerner int ret = -ENOMEM; 25757edfd85bSLukas Czerner 25767edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2577da812f61SLukas Czerner return 0; 2578da812f61SLukas Czerner 25797edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 25807edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 25817edfd85bSLukas Czerner GFP_KERNEL); 25827edfd85bSLukas Czerner if (!s_mount_opts) 25837edfd85bSLukas Czerner return ret; 2584e6e268cbSLukas Czerner 25857edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 25867edfd85bSLukas Czerner if (!fc) 25877edfd85bSLukas Czerner goto out_free; 2588e6e268cbSLukas Czerner 25897edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 25907edfd85bSLukas Czerner if (!s_ctx) 25917edfd85bSLukas Czerner goto out_free; 25927edfd85bSLukas Czerner 25937edfd85bSLukas Czerner fc->fs_private = s_ctx; 25947edfd85bSLukas Czerner fc->s_fs_info = sbi; 25957edfd85bSLukas Czerner 25967edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 25977edfd85bSLukas Czerner if (ret < 0) 25987edfd85bSLukas Czerner goto parse_failed; 25997edfd85bSLukas Czerner 26007edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 26017edfd85bSLukas Czerner if (ret < 0) { 26027edfd85bSLukas Czerner parse_failed: 26037edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 26047edfd85bSLukas Czerner "failed to parse options in superblock: %s", 26057edfd85bSLukas Czerner s_mount_opts); 26067edfd85bSLukas Czerner ret = 0; 26077edfd85bSLukas Czerner goto out_free; 26087edfd85bSLukas Czerner } 26097edfd85bSLukas Czerner 26107edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 26117edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 26127edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 26137edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 26147edfd85bSLukas Czerner 26157edfd85bSLukas Czerner ret = ext4_apply_options(fc, sb); 26167edfd85bSLukas Czerner 26177edfd85bSLukas Czerner out_free: 26187edfd85bSLukas Czerner kfree(s_ctx); 26197edfd85bSLukas Czerner kfree(fc); 26207edfd85bSLukas Czerner kfree(s_mount_opts); 26217edfd85bSLukas Czerner return ret; 26224c94bff9SLukas Czerner } 26234c94bff9SLukas Czerner 2624e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2625e6e268cbSLukas Czerner struct super_block *sb) 2626e6e268cbSLukas Czerner { 2627e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 26286e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2629e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2630e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2631e6e268cbSLukas Czerner char *qname; 2632e6e268cbSLukas Czerner int i; 2633e6e268cbSLukas Czerner 26346e47a3ccSLukas Czerner if (quota_feature) 26356e47a3ccSLukas Czerner return; 26366e47a3ccSLukas Czerner 26376e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2638e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2639e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2640e6e268cbSLukas Czerner continue; 26416e47a3ccSLukas Czerner 2642e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 26434c1bd5a9SLukas Czerner if (qname) 26444c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2645e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 264613b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 264713b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 264813b215a9SLukas Czerner if (qname) 264913b215a9SLukas Czerner kfree_rcu(qname); 2650e6e268cbSLukas Czerner } 26516e47a3ccSLukas Czerner } 26526e47a3ccSLukas Czerner 26536e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 26546e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2655e6e268cbSLukas Czerner #endif 2656e6e268cbSLukas Czerner } 2657e6e268cbSLukas Czerner 2658e6e268cbSLukas Czerner /* 2659e6e268cbSLukas Czerner * Check quota settings consistency. 2660e6e268cbSLukas Czerner */ 2661e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2662e6e268cbSLukas Czerner struct super_block *sb) 2663e6e268cbSLukas Czerner { 2664e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2665e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2666e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2667e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2668e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 26696e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 26706e47a3ccSLukas Czerner int quota_flags, i; 2671e6e268cbSLukas Czerner 26726e47a3ccSLukas Czerner /* 26736e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 26746e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 26756e47a3ccSLukas Czerner * to support legacy quotas in quota files. 26766e47a3ccSLukas Czerner */ 26776e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 26786e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 26796e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 26806e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 26816e47a3ccSLukas Czerner return -EINVAL; 26826e47a3ccSLukas Czerner } 26836e47a3ccSLukas Czerner 26846e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 26856e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 26866e47a3ccSLukas Czerner if (quota_loaded && 26876e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 26886e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 26896e47a3ccSLukas Czerner goto err_quota_change; 26906e47a3ccSLukas Czerner 26916e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2692e6e268cbSLukas Czerner 2693e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2694e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2695e6e268cbSLukas Czerner continue; 2696e6e268cbSLukas Czerner 26976e47a3ccSLukas Czerner if (quota_loaded && 26986e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2699e6e268cbSLukas Czerner goto err_jquota_change; 2700e6e268cbSLukas Czerner 2701e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 270213b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2703e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2704e6e268cbSLukas Czerner goto err_jquota_specified; 2705e6e268cbSLukas Czerner } 27066e47a3ccSLukas Czerner 27076e47a3ccSLukas Czerner if (quota_feature) { 27086e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 27096e47a3ccSLukas Czerner "Journaled quota options ignored when " 27106e47a3ccSLukas Czerner "QUOTA feature is enabled"); 27116e47a3ccSLukas Czerner return 0; 27126e47a3ccSLukas Czerner } 2713e6e268cbSLukas Czerner } 2714e6e268cbSLukas Czerner 27156e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2716e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 27176e47a3ccSLukas Czerner goto err_jquota_change; 2718e6e268cbSLukas Czerner if (quota_feature) { 2719e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2720e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2721e6e268cbSLukas Czerner return 0; 2722e6e268cbSLukas Czerner } 2723e6e268cbSLukas Czerner } 27246e47a3ccSLukas Czerner 27256e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 27266e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 27276e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 27286e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 27296e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 27306e47a3ccSLukas Czerner 27316e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 27326e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 27336e47a3ccSLukas Czerner 27346e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 27356e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 27366e47a3ccSLukas Czerner 27376e47a3ccSLukas Czerner if (usr_qf_name) { 27386e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 27396e47a3ccSLukas Czerner usrquota = false; 27406e47a3ccSLukas Czerner } 27416e47a3ccSLukas Czerner if (grp_qf_name) { 27426e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 27436e47a3ccSLukas Czerner grpquota = false; 27446e47a3ccSLukas Czerner } 27456e47a3ccSLukas Czerner 27466e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 27476e47a3ccSLukas Czerner if (usrquota || grpquota) { 27486e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 27496e47a3ccSLukas Czerner "format mixing"); 27506e47a3ccSLukas Czerner return -EINVAL; 27516e47a3ccSLukas Czerner } 27526e47a3ccSLukas Czerner 27536e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 27546e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 27556e47a3ccSLukas Czerner "not specified"); 27566e47a3ccSLukas Czerner return -EINVAL; 27576e47a3ccSLukas Czerner } 27586e47a3ccSLukas Czerner } 27596e47a3ccSLukas Czerner 2760e6e268cbSLukas Czerner return 0; 2761e6e268cbSLukas Czerner 2762e6e268cbSLukas Czerner err_quota_change: 2763e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2764e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2765e6e268cbSLukas Czerner return -EINVAL; 2766e6e268cbSLukas Czerner err_jquota_change: 2767e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2768e6e268cbSLukas Czerner "options when quota turned on"); 2769e6e268cbSLukas Czerner return -EINVAL; 2770e6e268cbSLukas Czerner err_jquota_specified: 2771e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2772e6e268cbSLukas Czerner QTYPE2NAME(i)); 2773e6e268cbSLukas Czerner return -EINVAL; 2774e6e268cbSLukas Czerner #else 2775e6e268cbSLukas Czerner return 0; 2776e6e268cbSLukas Czerner #endif 2777e6e268cbSLukas Czerner } 2778e6e268cbSLukas Czerner 2779b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2780b6bd2435SLukas Czerner struct super_block *sb) 2781b6bd2435SLukas Czerner { 2782b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27836e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27846e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 2785b6bd2435SLukas Czerner 2786b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2787b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2788b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2789b6bd2435SLukas Czerner return -EINVAL; 2790b6bd2435SLukas Czerner } 2791b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2792b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2793b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2794b6bd2435SLukas Czerner return -EINVAL; 2795b6bd2435SLukas Czerner } 2796b6bd2435SLukas Czerner 27976e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27986e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27996e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 28006e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 28016e47a3ccSLukas Czerner ctx->s_want_extra_isize); 28026e47a3ccSLukas Czerner return -EINVAL; 28036e47a3ccSLukas Czerner } 28046e47a3ccSLukas Czerner 28056e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 28066e47a3ccSLukas Czerner int blocksize = 28076e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 28086e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 28096e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 28106e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 28116e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 28126e47a3ccSLukas Czerner } 28136e47a3ccSLukas Czerner 28146e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 28156e47a3ccSLukas Czerner /* 28166e47a3ccSLukas Czerner * This mount option is just for testing, and it's not worthwhile to 28176e47a3ccSLukas Czerner * implement the extra complexity (e.g. RCU protection) that would be 28186e47a3ccSLukas Czerner * needed to allow it to be set or changed during remount. We do allow 28196e47a3ccSLukas Czerner * it to be specified during remount, but only if there is no change. 28206e47a3ccSLukas Czerner */ 28216e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) && 28226e47a3ccSLukas Czerner is_remount && !sbi->s_dummy_enc_policy.policy) { 28236e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28246e47a3ccSLukas Czerner "Can't set test_dummy_encryption on remount"); 28256e47a3ccSLukas Czerner return -1; 28266e47a3ccSLukas Czerner } 28276e47a3ccSLukas Czerner #endif 28286e47a3ccSLukas Czerner 28296e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 28306e47a3ccSLukas Czerner if (!sbi->s_journal) { 28316e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28326e47a3ccSLukas Czerner "Remounting file system with no journal " 28336e47a3ccSLukas Czerner "so ignoring journalled data option"); 28346e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 28354c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 28364c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 28376e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 28386e47a3ccSLukas Czerner "on remount"); 28396e47a3ccSLukas Czerner return -EINVAL; 28406e47a3ccSLukas Czerner } 28416e47a3ccSLukas Czerner } 28426e47a3ccSLukas Czerner 28436e47a3ccSLukas Czerner if (is_remount) { 28446e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28456e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 28466e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 28476e47a3ccSLukas Czerner "both data=journal and dax"); 28486e47a3ccSLukas Czerner return -EINVAL; 28496e47a3ccSLukas Czerner } 28506e47a3ccSLukas Czerner 28516e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28526e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28536e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 28546e47a3ccSLukas Czerner fail_dax_change_remount: 28556e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 28566e47a3ccSLukas Czerner "dax mount option while remounting"); 28576e47a3ccSLukas Czerner return -EINVAL; 28586e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28596e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28606e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28616e47a3ccSLukas Czerner goto fail_dax_change_remount; 28626e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28636e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28646e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28656e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28666e47a3ccSLukas Czerner goto fail_dax_change_remount; 28676e47a3ccSLukas Czerner } 28686e47a3ccSLukas Czerner } 28696e47a3ccSLukas Czerner 2870b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2871b6bd2435SLukas Czerner } 2872b6bd2435SLukas Czerner 28736e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28746e47a3ccSLukas Czerner { 28756e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28766e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28776e47a3ccSLukas Czerner int ret = 0; 28786e47a3ccSLukas Czerner 28796e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28806e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28816e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28826e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28836e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 28846e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28856e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28866e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28876e47a3ccSLukas Czerner 2888960e0ab6SLukas Czerner /* 2889960e0ab6SLukas Czerner * i_version differs from common mount option iversion so we have 2890960e0ab6SLukas Czerner * to let vfs know that it was set, otherwise it would get cleared 2891960e0ab6SLukas Czerner * on remount 2892960e0ab6SLukas Czerner */ 2893960e0ab6SLukas Czerner if (ctx->mask_s_flags & SB_I_VERSION) 2894960e0ab6SLukas Czerner fc->sb_flags |= SB_I_VERSION; 2895960e0ab6SLukas Czerner 28966e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28976e47a3ccSLukas Czerner APPLY(s_commit_interval); 28986e47a3ccSLukas Czerner APPLY(s_stripe); 28996e47a3ccSLukas Czerner APPLY(s_max_batch_time); 29006e47a3ccSLukas Czerner APPLY(s_min_batch_time); 29016e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 29026e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 29036e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 29046e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 29056e47a3ccSLukas Czerner APPLY(s_resgid); 29066e47a3ccSLukas Czerner APPLY(s_resuid); 29076e47a3ccSLukas Czerner 29086e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 29096e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 29106e47a3ccSLukas Czerner #endif 29116e47a3ccSLukas Czerner 29126e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 29136e47a3ccSLukas Czerner 29146e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) 29156e47a3ccSLukas Czerner ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg); 29166e47a3ccSLukas Czerner 29176e47a3ccSLukas Czerner return ret; 29186e47a3ccSLukas Czerner } 29196e47a3ccSLukas Czerner 29206e47a3ccSLukas Czerner 2921da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 29224c94bff9SLukas Czerner { 2923ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 29246e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29254c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 29266e47a3ccSLukas Czerner 29276e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 29286e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 29296e47a3ccSLukas Czerner 293033458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 29316e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 29326e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2933ac27a0ecSDave Kleikamp 29346e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 29356e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2936ac27a0ecSDave Kleikamp 29376e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 29386e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2939da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2940b31e1552SEric Sandeen "format mixing"); 2941da812f61SLukas Czerner return -EINVAL; 2942ac27a0ecSDave Kleikamp } 2943ac27a0ecSDave Kleikamp } 2944ac27a0ecSDave Kleikamp #endif 29456e47a3ccSLukas Czerner return 1; 2946ac27a0ecSDave Kleikamp } 2947ac27a0ecSDave Kleikamp 29482adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 29492adf6da8STheodore Ts'o struct super_block *sb) 29502adf6da8STheodore Ts'o { 29512adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 29522adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 295333458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 29542adf6da8STheodore Ts'o 29552adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 29562adf6da8STheodore Ts'o char *fmtname = ""; 29572adf6da8STheodore Ts'o 29582adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 29592adf6da8STheodore Ts'o case QFMT_VFS_OLD: 29602adf6da8STheodore Ts'o fmtname = "vfsold"; 29612adf6da8STheodore Ts'o break; 29622adf6da8STheodore Ts'o case QFMT_VFS_V0: 29632adf6da8STheodore Ts'o fmtname = "vfsv0"; 29642adf6da8STheodore Ts'o break; 29652adf6da8STheodore Ts'o case QFMT_VFS_V1: 29662adf6da8STheodore Ts'o fmtname = "vfsv1"; 29672adf6da8STheodore Ts'o break; 29682adf6da8STheodore Ts'o } 29692adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29702adf6da8STheodore Ts'o } 29712adf6da8STheodore Ts'o 297233458eabSTheodore Ts'o rcu_read_lock(); 297333458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 297433458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 297533458eabSTheodore Ts'o if (usr_qf_name) 297633458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 297733458eabSTheodore Ts'o if (grp_qf_name) 297833458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 297933458eabSTheodore Ts'o rcu_read_unlock(); 29802adf6da8STheodore Ts'o #endif 29812adf6da8STheodore Ts'o } 29822adf6da8STheodore Ts'o 29835a916be1STheodore Ts'o static const char *token2str(int token) 29845a916be1STheodore Ts'o { 298597d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29865a916be1STheodore Ts'o 298797d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 298897d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29895a916be1STheodore Ts'o break; 299097d8a670SLukas Czerner return spec->name; 29915a916be1STheodore Ts'o } 29925a916be1STheodore Ts'o 29932adf6da8STheodore Ts'o /* 29942adf6da8STheodore Ts'o * Show an option if 29952adf6da8STheodore Ts'o * - it's set to a non-default value OR 29962adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29972adf6da8STheodore Ts'o */ 299866acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 299966acdcf4STheodore Ts'o int nodefs) 30002adf6da8STheodore Ts'o { 30012adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30022adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 300368afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 30045a916be1STheodore Ts'o const struct mount_opts *m; 300566acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 30062adf6da8STheodore Ts'o 300766acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 300866acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 30092adf6da8STheodore Ts'o 30102adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 30115a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 30125a916be1STheodore Ts'o 30135a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 30145a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 30155a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 3016ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 30175a916be1STheodore Ts'o continue; 301868afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 30195a916be1STheodore Ts'o continue; /* skip if same as the default */ 30205a916be1STheodore Ts'o if ((want_set && 30215a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 30225a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 30235a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 30245a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 30255a916be1STheodore Ts'o } 30265a916be1STheodore Ts'o 302708cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 30285a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 302908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 303008cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 303108cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 30325a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 303308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 303408cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 303566acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 30365a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 30375a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 30382adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 30395a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 30402adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 30415a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 304266acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 30435a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 304466acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 30455a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 304666acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 30475a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 3048357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 30495a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 305066acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 30515a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 305268afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 305368afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 30542adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30555a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30562adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30575a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30582adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30595a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30605a916be1STheodore Ts'o } 306166acdcf4STheodore Ts'o if (nodefs || 306266acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30635a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30642adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30652adf6da8STheodore Ts'o 3066ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 306766acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30685a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3069df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3070df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30717915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30727915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3073ed318a6cSEric Biggers 3074ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30752adf6da8STheodore Ts'o 30764f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30774f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30784f74d15fSEric Biggers 30799cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30809cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30819cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30829cb20f94SIra Weiny else 30839cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30849cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30859cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30869cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30879cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30889cb20f94SIra Weiny } 30892adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30902adf6da8STheodore Ts'o return 0; 30912adf6da8STheodore Ts'o } 30922adf6da8STheodore Ts'o 309366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 309466acdcf4STheodore Ts'o { 309566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 309666acdcf4STheodore Ts'o } 309766acdcf4STheodore Ts'o 3098ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 309966acdcf4STheodore Ts'o { 310066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 310166acdcf4STheodore Ts'o int rc; 310266acdcf4STheodore Ts'o 3103bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 310466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 310566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 310666acdcf4STheodore Ts'o return rc; 310766acdcf4STheodore Ts'o } 310866acdcf4STheodore Ts'o 3109617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3110ac27a0ecSDave Kleikamp int read_only) 3111ac27a0ecSDave Kleikamp { 3112617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3113c89128a0SJaegeuk Kim int err = 0; 3114ac27a0ecSDave Kleikamp 3115617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3116b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3117b31e1552SEric Sandeen "forcing read-only mode"); 3118c89128a0SJaegeuk Kim err = -EROFS; 31195adaccacSyangerkun goto done; 3120ac27a0ecSDave Kleikamp } 3121ac27a0ecSDave Kleikamp if (read_only) 3122281b5995STheodore Ts'o goto done; 3123617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3124b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3125b31e1552SEric Sandeen "running e2fsck is recommended"); 3126c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3127b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3128b31e1552SEric Sandeen "warning: mounting fs with errors, " 3129b31e1552SEric Sandeen "running e2fsck is recommended"); 3130ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3131ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3132ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3133b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3134b31e1552SEric Sandeen "warning: maximal mount count reached, " 3135b31e1552SEric Sandeen "running e2fsck is recommended"); 3136ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 31376a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 31386a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3139b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3140b31e1552SEric Sandeen "warning: checktime reached, " 3141b31e1552SEric Sandeen "running e2fsck is recommended"); 31420390131bSFrank Mayhar if (!sbi->s_journal) 3143216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3144ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3145617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3146e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31476a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 314802f310fcSJan Kara if (sbi->s_journal) { 3149e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 315002f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 315102f310fcSJan Kara ext4_set_feature_orphan_present(sb); 315202f310fcSJan Kara } 3153ac27a0ecSDave Kleikamp 31544392fbc4SJan Kara err = ext4_commit_super(sb); 3155281b5995STheodore Ts'o done: 3156ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3157a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3158a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3159ac27a0ecSDave Kleikamp sb->s_blocksize, 3160ac27a0ecSDave Kleikamp sbi->s_groups_count, 3161617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3162617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3163a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3164c89128a0SJaegeuk Kim return err; 3165ac27a0ecSDave Kleikamp } 3166ac27a0ecSDave Kleikamp 3167117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3168117fff10STheodore Ts'o { 3169117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31707c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 317137b0b6b8SDan Carpenter int size, i, j; 3172117fff10STheodore Ts'o 3173117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3174117fff10STheodore Ts'o return 0; 3175117fff10STheodore Ts'o 3176117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3177117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3178117fff10STheodore Ts'o return 0; 3179117fff10STheodore Ts'o 31807c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31817c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3182117fff10STheodore Ts'o if (!new_groups) { 31837c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31847c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3185117fff10STheodore Ts'o return -ENOMEM; 3186117fff10STheodore Ts'o } 31877c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31887c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31897c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31907c990728SSuraj Jitindar Singh GFP_KERNEL); 31917c990728SSuraj Jitindar Singh if (!new_groups[i]) { 319237b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 319337b0b6b8SDan Carpenter kvfree(new_groups[j]); 31947c990728SSuraj Jitindar Singh kvfree(new_groups); 31957c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31967c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31977c990728SSuraj Jitindar Singh return -ENOMEM; 3198117fff10STheodore Ts'o } 31997c990728SSuraj Jitindar Singh } 32007c990728SSuraj Jitindar Singh rcu_read_lock(); 32017c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 32027c990728SSuraj Jitindar Singh if (old_groups) 32037c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 32047c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 32057c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 32067c990728SSuraj Jitindar Singh rcu_read_unlock(); 32077c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 32087c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 32097c990728SSuraj Jitindar Singh if (old_groups) 32107c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3211117fff10STheodore Ts'o return 0; 3212117fff10STheodore Ts'o } 3213117fff10STheodore Ts'o 3214772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3215772cb7c8SJose R. Santos { 3216772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3217772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 32187c990728SSuraj Jitindar Singh struct flex_groups *fg; 3219772cb7c8SJose R. Santos ext4_group_t flex_group; 3220117fff10STheodore Ts'o int i, err; 3221772cb7c8SJose R. Santos 3222503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3223d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3224772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3225772cb7c8SJose R. Santos return 1; 3226772cb7c8SJose R. Santos } 3227772cb7c8SJose R. Santos 3228117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3229117fff10STheodore Ts'o if (err) 3230772cb7c8SJose R. Santos goto failed; 3231772cb7c8SJose R. Santos 3232772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 323388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3234772cb7c8SJose R. Santos 3235772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 32367c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 32377c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 323890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 32397c990728SSuraj Jitindar Singh &fg->free_clusters); 32407c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3241772cb7c8SJose R. Santos } 3242772cb7c8SJose R. Santos 3243772cb7c8SJose R. Santos return 1; 3244772cb7c8SJose R. Santos failed: 3245772cb7c8SJose R. Santos return 0; 3246772cb7c8SJose R. Santos } 3247772cb7c8SJose R. Santos 3248e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3249717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3250717d50e4SAndreas Dilger { 3251b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3252717d50e4SAndreas Dilger __u16 crc = 0; 3253717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3254e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3255717d50e4SAndreas Dilger 32569aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3257feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3258feb0ab32SDarrick J. Wong __u32 csum32; 3259b47820edSDaeho Jeong __u16 dummy_csum = 0; 3260feb0ab32SDarrick J. Wong 3261feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3262feb0ab32SDarrick J. Wong sizeof(le_group)); 3263b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3264b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3265b47820edSDaeho Jeong sizeof(dummy_csum)); 3266b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3267b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3268b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3269b47820edSDaeho Jeong sbi->s_desc_size - offset); 3270feb0ab32SDarrick J. Wong 3271feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3272feb0ab32SDarrick J. Wong goto out; 3273feb0ab32SDarrick J. Wong } 3274feb0ab32SDarrick J. Wong 3275feb0ab32SDarrick J. Wong /* old crc16 code */ 3276e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3277813d32f9SDarrick J. Wong return 0; 3278813d32f9SDarrick J. Wong 3279717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3280717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3281717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3282717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3283717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3284e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3285717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3286717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3287717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3288717d50e4SAndreas Dilger offset); 3289717d50e4SAndreas Dilger 3290feb0ab32SDarrick J. Wong out: 3291717d50e4SAndreas Dilger return cpu_to_le16(crc); 3292717d50e4SAndreas Dilger } 3293717d50e4SAndreas Dilger 3294feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3295717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3296717d50e4SAndreas Dilger { 3297feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3298e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3299717d50e4SAndreas Dilger return 0; 3300717d50e4SAndreas Dilger 3301717d50e4SAndreas Dilger return 1; 3302717d50e4SAndreas Dilger } 3303717d50e4SAndreas Dilger 3304feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3305feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3306feb0ab32SDarrick J. Wong { 3307feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3308feb0ab32SDarrick J. Wong return; 3309e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3310feb0ab32SDarrick J. Wong } 3311feb0ab32SDarrick J. Wong 3312ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3313bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3314829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3315bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3316ac27a0ecSDave Kleikamp { 3317617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3318617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3319617ba13bSMingming Cao ext4_fsblk_t last_block; 332044de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3321bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3322bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3323bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3324ce421581SJose R. Santos int flexbg_flag = 0; 3325bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3326ac27a0ecSDave Kleikamp 3327e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3328ce421581SJose R. Santos flexbg_flag = 1; 3329ce421581SJose R. Santos 3330617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3331ac27a0ecSDave Kleikamp 3332197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3333197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3334197cd65aSAkinobu Mita 3335ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3336bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3337ac27a0ecSDave Kleikamp else 3338ac27a0ecSDave Kleikamp last_block = first_block + 3339617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3340ac27a0ecSDave Kleikamp 3341bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3342bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3343bfff6873SLukas Czerner grp = i; 3344bfff6873SLukas Czerner 33458fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3346829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3347829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3348829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3349829fa70dSTheodore Ts'o "superblock", i); 335018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 335118db4b4eSTheodore Ts'o return 0; 3352829fa70dSTheodore Ts'o } 335377260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 335477260807STheodore Ts'o block_bitmap <= last_bg_block) { 335577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 335677260807STheodore Ts'o "Block bitmap for group %u overlaps " 335777260807STheodore Ts'o "block group descriptors", i); 335877260807STheodore Ts'o if (!sb_rdonly(sb)) 335977260807STheodore Ts'o return 0; 336077260807STheodore Ts'o } 33612b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3362b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3363a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3364b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3365ac27a0ecSDave Kleikamp return 0; 3366ac27a0ecSDave Kleikamp } 33678fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3368829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3369829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3370829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3371829fa70dSTheodore Ts'o "superblock", i); 337218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 337318db4b4eSTheodore Ts'o return 0; 3374829fa70dSTheodore Ts'o } 337577260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 337677260807STheodore Ts'o inode_bitmap <= last_bg_block) { 337777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 337877260807STheodore Ts'o "Inode bitmap for group %u overlaps " 337977260807STheodore Ts'o "block group descriptors", i); 338077260807STheodore Ts'o if (!sb_rdonly(sb)) 338177260807STheodore Ts'o return 0; 338277260807STheodore Ts'o } 33832b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3384b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3385a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3386b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3387ac27a0ecSDave Kleikamp return 0; 3388ac27a0ecSDave Kleikamp } 33898fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3390829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3391829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3392829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3393829fa70dSTheodore Ts'o "superblock", i); 339418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 339518db4b4eSTheodore Ts'o return 0; 3396829fa70dSTheodore Ts'o } 339777260807STheodore Ts'o if (inode_table >= sb_block + 1 && 339877260807STheodore Ts'o inode_table <= last_bg_block) { 339977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 340077260807STheodore Ts'o "Inode table for group %u overlaps " 340177260807STheodore Ts'o "block group descriptors", i); 340277260807STheodore Ts'o if (!sb_rdonly(sb)) 340377260807STheodore Ts'o return 0; 340477260807STheodore Ts'o } 3405bd81d8eeSLaurent Vivier if (inode_table < first_block || 34062b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3407b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3408a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3409b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3410ac27a0ecSDave Kleikamp return 0; 3411ac27a0ecSDave Kleikamp } 3412955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3413feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3414b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3415b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3416e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3417fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3418bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3419955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3420717d50e4SAndreas Dilger return 0; 3421717d50e4SAndreas Dilger } 34227ee1ec4cSLi Zefan } 3423955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3424ce421581SJose R. Santos if (!flexbg_flag) 3425617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3426ac27a0ecSDave Kleikamp } 3427bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3428bfff6873SLukas Czerner *first_not_zeroed = grp; 3429ac27a0ecSDave Kleikamp return 1; 3430ac27a0ecSDave Kleikamp } 3431ac27a0ecSDave Kleikamp 3432cd2291a4SEric Sandeen /* 3433cd2291a4SEric Sandeen * Maximal extent format file size. 3434cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3435cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3436cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3437cd2291a4SEric Sandeen * so that won't be a limiting factor. 3438cd2291a4SEric Sandeen * 3439f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3440f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3441f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3442f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3443f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3444f17722f9SLukas Czerner * 3445cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3446cd2291a4SEric Sandeen */ 3447f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3448cd2291a4SEric Sandeen { 3449cd2291a4SEric Sandeen loff_t res; 3450cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3451cd2291a4SEric Sandeen 345272deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 345372deb455SChristoph Hellwig 345472deb455SChristoph Hellwig if (!has_huge_files) { 3455cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3456cd2291a4SEric Sandeen 3457cd2291a4SEric Sandeen /* total blocks in file system block size */ 3458cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3459cd2291a4SEric Sandeen upper_limit <<= blkbits; 3460cd2291a4SEric Sandeen } 3461cd2291a4SEric Sandeen 3462f17722f9SLukas Czerner /* 3463f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3464f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3465f17722f9SLukas Czerner * size 3466f17722f9SLukas Czerner */ 3467f17722f9SLukas Czerner res = (1LL << 32) - 1; 3468cd2291a4SEric Sandeen res <<= blkbits; 3469cd2291a4SEric Sandeen 3470cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3471cd2291a4SEric Sandeen if (res > upper_limit) 3472cd2291a4SEric Sandeen res = upper_limit; 3473cd2291a4SEric Sandeen 3474cd2291a4SEric Sandeen return res; 3475cd2291a4SEric Sandeen } 3476ac27a0ecSDave Kleikamp 3477ac27a0ecSDave Kleikamp /* 3478cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34790fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34800fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3481ac27a0ecSDave Kleikamp */ 3482f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3483ac27a0ecSDave Kleikamp { 3484*5c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34850fc1b451SAneesh Kumar K.V int meta_blocks; 3486*5c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 348775ca6ad4SRitesh Harjani 348875ca6ad4SRitesh Harjani /* 348975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34900b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34910b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34920b8e58a1SAndreas Dilger * 34930b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34940b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34950fc1b451SAneesh Kumar K.V */ 349672deb455SChristoph Hellwig if (!has_huge_files) { 34970fc1b451SAneesh Kumar K.V /* 349872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 349972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 350072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 35010fc1b451SAneesh Kumar K.V */ 35020fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 35030fc1b451SAneesh Kumar K.V 35040fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 35050fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 35060fc1b451SAneesh Kumar K.V 35070fc1b451SAneesh Kumar K.V } else { 35088180a562SAneesh Kumar K.V /* 35098180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 35108180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 35118180a562SAneesh Kumar K.V * represent total number of blocks in 35128180a562SAneesh Kumar K.V * file system block size 35138180a562SAneesh Kumar K.V */ 35140fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 35150fc1b451SAneesh Kumar K.V 35160fc1b451SAneesh Kumar K.V } 35170fc1b451SAneesh Kumar K.V 3518*5c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 3519*5c93e8ecSZhang Yi res += ppb; 3520*5c93e8ecSZhang Yi res += ppb * ppb; 3521*5c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 3522*5c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 3523*5c93e8ecSZhang Yi meta_blocks = 1; 3524*5c93e8ecSZhang Yi meta_blocks += 1 + ppb; 3525*5c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 3526*5c93e8ecSZhang Yi /* Does block tree limit file size? */ 3527*5c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 3528*5c93e8ecSZhang Yi goto check_lfs; 3529*5c93e8ecSZhang Yi 3530*5c93e8ecSZhang Yi res = upper_limit; 3531*5c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 3532*5c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 35330fc1b451SAneesh Kumar K.V /* indirect blocks */ 35340fc1b451SAneesh Kumar K.V meta_blocks = 1; 3535*5c93e8ecSZhang Yi upper_limit -= ppb; 35360fc1b451SAneesh Kumar K.V /* double indirect blocks */ 3537*5c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 3538*5c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 3539*5c93e8ecSZhang Yi res -= meta_blocks; 3540*5c93e8ecSZhang Yi goto check_lfs; 3541*5c93e8ecSZhang Yi } 3542*5c93e8ecSZhang Yi meta_blocks += 1 + ppb; 3543*5c93e8ecSZhang Yi upper_limit -= ppb * ppb; 3544*5c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 3545*5c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 3546*5c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 3547*5c93e8ecSZhang Yi res -= meta_blocks; 3548*5c93e8ecSZhang Yi check_lfs: 3549ac27a0ecSDave Kleikamp res <<= bits; 35500fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35510fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35520fc1b451SAneesh Kumar K.V 3553*5c93e8ecSZhang Yi return res; 3554ac27a0ecSDave Kleikamp } 3555ac27a0ecSDave Kleikamp 3556617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 355770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3558ac27a0ecSDave Kleikamp { 3559617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3560fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3561ac27a0ecSDave Kleikamp int has_super = 0; 3562ac27a0ecSDave Kleikamp 3563ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3564ac27a0ecSDave Kleikamp 3565e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 356670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3567ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3568617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3569ac27a0ecSDave Kleikamp has_super = 1; 35700b8e58a1SAndreas Dilger 3571bd63f6b0SDarrick J. Wong /* 3572bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3573bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3574bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3575bd63f6b0SDarrick J. Wong * compensate. 3576bd63f6b0SDarrick J. Wong */ 3577bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 357849598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3579bd63f6b0SDarrick J. Wong has_super++; 3580bd63f6b0SDarrick J. Wong 3581617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3582ac27a0ecSDave Kleikamp } 3583ac27a0ecSDave Kleikamp 3584c9de560dSAlex Tomas /** 3585c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3586c9de560dSAlex Tomas * @sbi: In memory super block info 3587c9de560dSAlex Tomas * 3588c9de560dSAlex Tomas * If we have specified it via mount option, then 3589c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3590c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3591c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3592c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3593c9de560dSAlex Tomas * 3594c9de560dSAlex Tomas */ 3595c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3596c9de560dSAlex Tomas { 3597c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3598c9de560dSAlex Tomas unsigned long stripe_width = 3599c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 36003eb08658SDan Ehrenberg int ret; 3601c9de560dSAlex Tomas 3602c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 36033eb08658SDan Ehrenberg ret = sbi->s_stripe; 36045469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 36053eb08658SDan Ehrenberg ret = stripe_width; 36065469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 36073eb08658SDan Ehrenberg ret = stride; 36083eb08658SDan Ehrenberg else 36093eb08658SDan Ehrenberg ret = 0; 3610c9de560dSAlex Tomas 36113eb08658SDan Ehrenberg /* 36123eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 36133eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 36143eb08658SDan Ehrenberg */ 36153eb08658SDan Ehrenberg if (ret <= 1) 36163eb08658SDan Ehrenberg ret = 0; 3617c9de560dSAlex Tomas 36183eb08658SDan Ehrenberg return ret; 3619c9de560dSAlex Tomas } 3620ac27a0ecSDave Kleikamp 3621a13fb1a4SEric Sandeen /* 3622a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3623a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3624a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3625a13fb1a4SEric Sandeen * 0 if it cannot be. 3626a13fb1a4SEric Sandeen */ 362725c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3628a13fb1a4SEric Sandeen { 3629e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3630a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3631a13fb1a4SEric Sandeen "Couldn't mount because of " 3632a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3633a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3634a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3635a13fb1a4SEric Sandeen return 0; 3636a13fb1a4SEric Sandeen } 3637a13fb1a4SEric Sandeen 36385298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3639c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3640c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3641c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3642c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3643c83ad55eSGabriel Krisman Bertazi return 0; 3644c83ad55eSGabriel Krisman Bertazi } 3645c83ad55eSGabriel Krisman Bertazi #endif 3646c83ad55eSGabriel Krisman Bertazi 3647a13fb1a4SEric Sandeen if (readonly) 3648a13fb1a4SEric Sandeen return 1; 3649a13fb1a4SEric Sandeen 3650e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36512cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36521751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36532cb5cc8bSDarrick J. Wong return 1; 36542cb5cc8bSDarrick J. Wong } 36552cb5cc8bSDarrick J. Wong 3656a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3657e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3658a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3659a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3660a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3661a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3662a13fb1a4SEric Sandeen return 0; 3663a13fb1a4SEric Sandeen } 3664e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3665bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3666bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3667bab08ab9STheodore Ts'o "extents feature\n"); 3668bab08ab9STheodore Ts'o return 0; 3669bab08ab9STheodore Ts'o } 36707c319d32SAditya Kali 36719db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3672d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3673d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36747c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3675d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3676689c958cSLi Xi return 0; 3677689c958cSLi Xi } 36787c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3679a13fb1a4SEric Sandeen return 1; 3680a13fb1a4SEric Sandeen } 3681a13fb1a4SEric Sandeen 368266e61a9eSTheodore Ts'o /* 368366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 368466e61a9eSTheodore Ts'o * on the file system 368566e61a9eSTheodore Ts'o */ 3686235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 368766e61a9eSTheodore Ts'o { 3688235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3689235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3690235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 369166e61a9eSTheodore Ts'o 369266e61a9eSTheodore Ts'o if (es->s_error_count) 3693ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3694ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 369566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 369666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36976a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36986a0678a7SArnd Bergmann sb->s_id, 36996a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 370066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 370166e61a9eSTheodore Ts'o es->s_first_error_func, 370266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 370366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3704651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 370566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 370666e61a9eSTheodore Ts'o if (es->s_first_error_block) 3707651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 370866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3709651e1c3bSJoe Perches printk(KERN_CONT "\n"); 371066e61a9eSTheodore Ts'o } 371166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 37126a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 37136a0678a7SArnd Bergmann sb->s_id, 37146a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 371566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 371666e61a9eSTheodore Ts'o es->s_last_error_func, 371766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 371866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3719651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 372066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 372166e61a9eSTheodore Ts'o if (es->s_last_error_block) 3722651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 372366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3724651e1c3bSJoe Perches printk(KERN_CONT "\n"); 372566e61a9eSTheodore Ts'o } 372666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 372766e61a9eSTheodore Ts'o } 372866e61a9eSTheodore Ts'o 3729bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3730bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3731bfff6873SLukas Czerner { 3732bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 37333d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 37343d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 37353d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 37363d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3737bfff6873SLukas Czerner int ret = 0; 373839fec688SShaoying Xu u64 start_time; 3739bfff6873SLukas Czerner 37403d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37413d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 37423d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 37433d392b26STheodore Ts'o if (prefetch_ios) 37443d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 37453d392b26STheodore Ts'o prefetch_ios); 37463d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 37473d392b26STheodore Ts'o prefetch_ios); 37483d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37493d392b26STheodore Ts'o ret = 1; 37503d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37513d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37523d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37533d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37543d392b26STheodore Ts'o ret = 0; 37553d392b26STheodore Ts'o } 37563d392b26STheodore Ts'o } 37573d392b26STheodore Ts'o return ret; 37583d392b26STheodore Ts'o } 3759bfff6873SLukas Czerner 37603d392b26STheodore Ts'o for (; group < ngroups; group++) { 3761bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3762bfff6873SLukas Czerner if (!gdp) { 3763bfff6873SLukas Czerner ret = 1; 3764bfff6873SLukas Czerner break; 3765bfff6873SLukas Czerner } 3766bfff6873SLukas Czerner 3767bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3768bfff6873SLukas Czerner break; 3769bfff6873SLukas Czerner } 3770bfff6873SLukas Czerner 37717f511862STheodore Ts'o if (group >= ngroups) 3772bfff6873SLukas Czerner ret = 1; 3773bfff6873SLukas Czerner 3774bfff6873SLukas Czerner if (!ret) { 377539fec688SShaoying Xu start_time = ktime_get_real_ns(); 3776bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3777bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37783d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3779bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 378039fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 378139fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3782bfff6873SLukas Czerner } 3783bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3784bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3785bfff6873SLukas Czerner } 3786bfff6873SLukas Czerner return ret; 3787bfff6873SLukas Czerner } 3788bfff6873SLukas Czerner 3789bfff6873SLukas Czerner /* 3790bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37914ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3792bfff6873SLukas Czerner */ 3793bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3794bfff6873SLukas Czerner { 3795bfff6873SLukas Czerner if (!elr) 3796bfff6873SLukas Czerner return; 3797bfff6873SLukas Czerner 3798bfff6873SLukas Czerner list_del(&elr->lr_request); 37993d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3800bfff6873SLukas Czerner kfree(elr); 3801bfff6873SLukas Czerner } 3802bfff6873SLukas Czerner 3803bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3804bfff6873SLukas Czerner { 38051bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 38061bb933fbSLukas Czerner if (!ext4_li_info) { 38071bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3808bfff6873SLukas Czerner return; 38091bb933fbSLukas Czerner } 3810bfff6873SLukas Czerner 3811bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 38121bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3813bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 38141bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3815bfff6873SLukas Czerner } 3816bfff6873SLukas Czerner 38178f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 38188f1f7453SEric Sandeen 3819bfff6873SLukas Czerner /* 3820bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3821bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3822bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3823bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3824bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3825bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3826bfff6873SLukas Czerner * next waking time and put itself into sleep. 3827bfff6873SLukas Czerner */ 3828bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3829bfff6873SLukas Czerner { 3830bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3831bfff6873SLukas Czerner struct list_head *pos, *n; 3832bfff6873SLukas Czerner struct ext4_li_request *elr; 38334ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3834bfff6873SLukas Czerner 3835bfff6873SLukas Czerner BUG_ON(NULL == eli); 3836bfff6873SLukas Czerner 3837bfff6873SLukas Czerner cont_thread: 3838bfff6873SLukas Czerner while (true) { 3839bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3840bfff6873SLukas Czerner 3841bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3842bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3843bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3844bfff6873SLukas Czerner goto exit_thread; 3845bfff6873SLukas Czerner } 3846bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3847e22834f0SDmitry Monakhov int err = 0; 3848e22834f0SDmitry Monakhov int progress = 0; 3849bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3850bfff6873SLukas Czerner lr_request); 3851bfff6873SLukas Czerner 3852e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3853e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3854e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3855e22834f0SDmitry Monakhov continue; 3856e22834f0SDmitry Monakhov } 3857e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3858e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3859e22834f0SDmitry Monakhov progress = 1; 3860e22834f0SDmitry Monakhov /* 3861e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3862e22834f0SDmitry Monakhov * be removed from the list, it is 3863e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3864e22834f0SDmitry Monakhov */ 3865e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3866e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3867e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3868e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3869e22834f0SDmitry Monakhov n = pos->next; 3870e22834f0SDmitry Monakhov } 3871e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3872e22834f0SDmitry Monakhov } 3873b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3874e22834f0SDmitry Monakhov if (err) { 3875bfff6873SLukas Czerner ext4_remove_li_request(elr); 3876bfff6873SLukas Czerner continue; 3877bfff6873SLukas Czerner } 3878e22834f0SDmitry Monakhov if (!progress) { 3879e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3880e22834f0SDmitry Monakhov (prandom_u32() 3881e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3882b2c78cd0STheodore Ts'o } 3883bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3884bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3885bfff6873SLukas Czerner } 3886bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3887bfff6873SLukas Czerner 3888a0acae0eSTejun Heo try_to_freeze(); 3889bfff6873SLukas Czerner 38904ed5c033SLukas Czerner cur = jiffies; 38914ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3892f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3893bfff6873SLukas Czerner cond_resched(); 3894bfff6873SLukas Czerner continue; 3895bfff6873SLukas Czerner } 3896bfff6873SLukas Czerner 38974ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38984ed5c033SLukas Czerner 38998f1f7453SEric Sandeen if (kthread_should_stop()) { 39008f1f7453SEric Sandeen ext4_clear_request_list(); 39018f1f7453SEric Sandeen goto exit_thread; 39028f1f7453SEric Sandeen } 3903bfff6873SLukas Czerner } 3904bfff6873SLukas Czerner 3905bfff6873SLukas Czerner exit_thread: 3906bfff6873SLukas Czerner /* 3907bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3908bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3909bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3910bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3911bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3912bfff6873SLukas Czerner * new one. 3913bfff6873SLukas Czerner */ 3914bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3915bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3916bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3917bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3918bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3919bfff6873SLukas Czerner goto cont_thread; 3920bfff6873SLukas Czerner } 3921bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3922bfff6873SLukas Czerner kfree(ext4_li_info); 3923bfff6873SLukas Czerner ext4_li_info = NULL; 3924bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3925bfff6873SLukas Czerner 3926bfff6873SLukas Czerner return 0; 3927bfff6873SLukas Czerner } 3928bfff6873SLukas Czerner 3929bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3930bfff6873SLukas Czerner { 3931bfff6873SLukas Czerner struct list_head *pos, *n; 3932bfff6873SLukas Czerner struct ext4_li_request *elr; 3933bfff6873SLukas Czerner 3934bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3935bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3936bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3937bfff6873SLukas Czerner lr_request); 3938bfff6873SLukas Czerner ext4_remove_li_request(elr); 3939bfff6873SLukas Czerner } 3940bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3941bfff6873SLukas Czerner } 3942bfff6873SLukas Czerner 3943bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3944bfff6873SLukas Czerner { 39458f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39468f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39478f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39488f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3949bfff6873SLukas Czerner ext4_clear_request_list(); 3950bfff6873SLukas Czerner kfree(ext4_li_info); 3951bfff6873SLukas Czerner ext4_li_info = NULL; 395292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3953bfff6873SLukas Czerner "initialization thread\n", 3954bfff6873SLukas Czerner err); 3955bfff6873SLukas Czerner return err; 3956bfff6873SLukas Czerner } 3957bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3958bfff6873SLukas Czerner return 0; 3959bfff6873SLukas Czerner } 3960bfff6873SLukas Czerner 3961bfff6873SLukas Czerner /* 3962bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3963bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3964bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3965bfff6873SLukas Czerner * groups and return total number of groups. 3966bfff6873SLukas Czerner */ 3967bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3968bfff6873SLukas Czerner { 3969bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3970bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3971bfff6873SLukas Czerner 39728844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39738844618dSTheodore Ts'o return ngroups; 39748844618dSTheodore Ts'o 3975bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3976bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3977bfff6873SLukas Czerner if (!gdp) 3978bfff6873SLukas Czerner continue; 3979bfff6873SLukas Czerner 398050122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3981bfff6873SLukas Czerner break; 3982bfff6873SLukas Czerner } 3983bfff6873SLukas Czerner 3984bfff6873SLukas Czerner return group; 3985bfff6873SLukas Czerner } 3986bfff6873SLukas Czerner 3987bfff6873SLukas Czerner static int ext4_li_info_new(void) 3988bfff6873SLukas Czerner { 3989bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3990bfff6873SLukas Czerner 3991bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3992bfff6873SLukas Czerner if (!eli) 3993bfff6873SLukas Czerner return -ENOMEM; 3994bfff6873SLukas Czerner 3995bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3996bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3997bfff6873SLukas Czerner 3998bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3999bfff6873SLukas Czerner 4000bfff6873SLukas Czerner ext4_li_info = eli; 4001bfff6873SLukas Czerner 4002bfff6873SLukas Czerner return 0; 4003bfff6873SLukas Czerner } 4004bfff6873SLukas Czerner 4005bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 4006bfff6873SLukas Czerner ext4_group_t start) 4007bfff6873SLukas Czerner { 4008bfff6873SLukas Czerner struct ext4_li_request *elr; 4009bfff6873SLukas Czerner 4010bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 4011bfff6873SLukas Czerner if (!elr) 4012bfff6873SLukas Czerner return NULL; 4013bfff6873SLukas Czerner 4014bfff6873SLukas Czerner elr->lr_super = sb; 40153d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 401621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 40173d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 4018bfff6873SLukas Czerner elr->lr_next_group = start; 401921175ca4SHarshad Shirwadkar } else { 402021175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 40213d392b26STheodore Ts'o } 4022bfff6873SLukas Czerner 4023bfff6873SLukas Czerner /* 4024bfff6873SLukas Czerner * Randomize first schedule time of the request to 4025bfff6873SLukas Czerner * spread the inode table initialization requests 4026bfff6873SLukas Czerner * better. 4027bfff6873SLukas Czerner */ 4028dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 4029dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 4030bfff6873SLukas Czerner return elr; 4031bfff6873SLukas Czerner } 4032bfff6873SLukas Czerner 40337f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4034bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4035bfff6873SLukas Czerner { 4036bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 40377f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 403849598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 40396c5a6cb9SAndrew Morton int ret = 0; 4040bfff6873SLukas Czerner 40417f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 404251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 404351ce6511SLukas Czerner /* 404451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 404551ce6511SLukas Czerner * s_li_wait_mult might have changed. 404651ce6511SLukas Czerner */ 404751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40487f511862STheodore Ts'o goto out; 404951ce6511SLukas Czerner } 4050bfff6873SLukas Czerner 405121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 40523d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 40533d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 40547f511862STheodore Ts'o goto out; 4055bfff6873SLukas Czerner 4056bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40577f511862STheodore Ts'o if (!elr) { 40587f511862STheodore Ts'o ret = -ENOMEM; 40597f511862STheodore Ts'o goto out; 40607f511862STheodore Ts'o } 4061bfff6873SLukas Czerner 4062bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4063bfff6873SLukas Czerner ret = ext4_li_info_new(); 4064bfff6873SLukas Czerner if (ret) 4065bfff6873SLukas Czerner goto out; 4066bfff6873SLukas Czerner } 4067bfff6873SLukas Czerner 4068bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4069bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4070bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4071bfff6873SLukas Czerner 4072bfff6873SLukas Czerner sbi->s_li_request = elr; 407346e4690bSTao Ma /* 407446e4690bSTao Ma * set elr to NULL here since it has been inserted to 407546e4690bSTao Ma * the request_list and the removal and free of it is 407646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 407746e4690bSTao Ma */ 407846e4690bSTao Ma elr = NULL; 4079bfff6873SLukas Czerner 4080bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4081bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4082bfff6873SLukas Czerner if (ret) 4083bfff6873SLukas Czerner goto out; 4084bfff6873SLukas Czerner } 4085bfff6873SLukas Czerner out: 4086bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4087beed5ecbSNicolas Kaiser if (ret) 4088bfff6873SLukas Czerner kfree(elr); 4089bfff6873SLukas Czerner return ret; 4090bfff6873SLukas Czerner } 4091bfff6873SLukas Czerner 4092bfff6873SLukas Czerner /* 4093bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4094bfff6873SLukas Czerner * module unload. 4095bfff6873SLukas Czerner */ 4096bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4097bfff6873SLukas Czerner { 4098bfff6873SLukas Czerner /* 4099bfff6873SLukas Czerner * If thread exited earlier 4100bfff6873SLukas Czerner * there's nothing to be done. 4101bfff6873SLukas Czerner */ 41028f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4103bfff6873SLukas Czerner return; 4104bfff6873SLukas Czerner 41058f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4106bfff6873SLukas Czerner } 4107bfff6873SLukas Czerner 410825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 410925ed6e8aSDarrick J. Wong { 411025ed6e8aSDarrick J. Wong int ret = 1; 411125ed6e8aSDarrick J. Wong int compat, incompat; 411225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 411325ed6e8aSDarrick J. Wong 41149aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4115db9ee220SDarrick J. Wong /* journal checksum v3 */ 411625ed6e8aSDarrick J. Wong compat = 0; 4117db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 411825ed6e8aSDarrick J. Wong } else { 411925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 412025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 412125ed6e8aSDarrick J. Wong incompat = 0; 412225ed6e8aSDarrick J. Wong } 412325ed6e8aSDarrick J. Wong 4124feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4125feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4126feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4127feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 412825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 412925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 413025ed6e8aSDarrick J. Wong compat, 0, 413125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 413225ed6e8aSDarrick J. Wong incompat); 413325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 413425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 413525ed6e8aSDarrick J. Wong compat, 0, 413625ed6e8aSDarrick J. Wong incompat); 413725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 413825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 413925ed6e8aSDarrick J. Wong } else { 4140feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4141feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 414225ed6e8aSDarrick J. Wong } 414325ed6e8aSDarrick J. Wong 414425ed6e8aSDarrick J. Wong return ret; 414525ed6e8aSDarrick J. Wong } 414625ed6e8aSDarrick J. Wong 4147952fc18eSTheodore Ts'o /* 4148952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4149952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4150952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4151952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4152952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4153952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4154952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4155952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4156952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4157952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4158952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4159952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4160952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4161952fc18eSTheodore Ts'o */ 4162952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4163952fc18eSTheodore Ts'o char *buf) 4164952fc18eSTheodore Ts'o { 4165952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4166952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4167952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4168952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4169952fc18eSTheodore Ts'o int s, j, count = 0; 4170952fc18eSTheodore Ts'o 4171e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 41720548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 41730548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41740548bbb8STheodore Ts'o 4175952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4176952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4177952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4178952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4179952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4180952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4181952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4182952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4183952fc18eSTheodore Ts'o count++; 4184952fc18eSTheodore Ts'o } 4185952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4186952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4187952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4188952fc18eSTheodore Ts'o count++; 4189952fc18eSTheodore Ts'o } 4190952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4191952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4192952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4193952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4194952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4195952fc18eSTheodore Ts'o count++; 4196952fc18eSTheodore Ts'o } 4197952fc18eSTheodore Ts'o if (i != grp) 4198952fc18eSTheodore Ts'o continue; 4199952fc18eSTheodore Ts'o s = 0; 4200952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4201952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4202952fc18eSTheodore Ts'o count++; 4203952fc18eSTheodore Ts'o } 4204c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4205c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4206c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4207c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4208c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4209952fc18eSTheodore Ts'o } 4210c48ae41bSTheodore Ts'o count += j; 4211c48ae41bSTheodore Ts'o for (; j > 0; j--) 4212c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4213952fc18eSTheodore Ts'o } 4214952fc18eSTheodore Ts'o if (!count) 4215952fc18eSTheodore Ts'o return 0; 4216952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4217952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4218952fc18eSTheodore Ts'o } 4219952fc18eSTheodore Ts'o 4220952fc18eSTheodore Ts'o /* 4221952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4222952fc18eSTheodore Ts'o */ 4223952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4224952fc18eSTheodore Ts'o { 4225952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4226952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 42273c816dedSEric Whitney struct inode *j_inode; 42283c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4229952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4230952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 42314fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4232952fc18eSTheodore Ts'o 4233952fc18eSTheodore Ts'o if (!buf) 4234952fc18eSTheodore Ts'o return -ENOMEM; 4235952fc18eSTheodore Ts'o 4236952fc18eSTheodore Ts'o /* 4237952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4238952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4239952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4240952fc18eSTheodore Ts'o */ 4241952fc18eSTheodore Ts'o 4242952fc18eSTheodore Ts'o /* 4243952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4244952fc18eSTheodore Ts'o */ 4245952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4246952fc18eSTheodore Ts'o 4247952fc18eSTheodore Ts'o /* 4248952fc18eSTheodore Ts'o * Add the overhead found in each block group 4249952fc18eSTheodore Ts'o */ 4250952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4251952fc18eSTheodore Ts'o int blks; 4252952fc18eSTheodore Ts'o 4253952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4254952fc18eSTheodore Ts'o overhead += blks; 4255952fc18eSTheodore Ts'o if (blks) 4256952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4257952fc18eSTheodore Ts'o cond_resched(); 4258952fc18eSTheodore Ts'o } 42593c816dedSEric Whitney 42603c816dedSEric Whitney /* 42613c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42623c816dedSEric Whitney * loaded or not 42633c816dedSEric Whitney */ 4264ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4265ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4266f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4267f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42683c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 42693c816dedSEric Whitney if (j_inode) { 42703c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42713c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42723c816dedSEric Whitney iput(j_inode); 42733c816dedSEric Whitney } else { 42743c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42753c816dedSEric Whitney } 42763c816dedSEric Whitney } 4277952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4278952fc18eSTheodore Ts'o smp_wmb(); 4279952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4280952fc18eSTheodore Ts'o return 0; 4281952fc18eSTheodore Ts'o } 4282952fc18eSTheodore Ts'o 4283b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 428427dd4385SLukas Czerner { 428527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4286b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 428727dd4385SLukas Czerner 428827dd4385SLukas Czerner /* 428930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 429030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 429130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 429230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 429330fac0f7SJan Kara */ 4294e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4295b5799018STheodore Ts'o return; 429630fac0f7SJan Kara /* 429727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 429827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 429927dd4385SLukas Czerner * out of space like for example punch hole, or converting 4300556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 430127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 430227dd4385SLukas Czerner * very rare. 430327dd4385SLukas Czerner */ 4304b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4305b5799018STheodore Ts'o sbi->s_cluster_bits); 430627dd4385SLukas Czerner 430727dd4385SLukas Czerner do_div(resv_clusters, 50); 430827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 430927dd4385SLukas Czerner 4310b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 431127dd4385SLukas Czerner } 431227dd4385SLukas Czerner 4313ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4314ca9b404fSRoman Anufriev { 4315ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4316ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4317ca9b404fSRoman Anufriev return "none"; 4318ca9b404fSRoman Anufriev 4319ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4320ca9b404fSRoman Anufriev return "journalled"; 4321ca9b404fSRoman Anufriev else 4322ca9b404fSRoman Anufriev return "writeback"; 4323ca9b404fSRoman Anufriev #else 4324ca9b404fSRoman Anufriev return "disabled"; 4325ca9b404fSRoman Anufriev #endif 4326ca9b404fSRoman Anufriev } 4327ca9b404fSRoman Anufriev 4328188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4329188c299eSJan Kara enum ext4_journal_trigger_type type, 4330188c299eSJan Kara void (*trigger)( 4331188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4332188c299eSJan Kara struct buffer_head *bh, 4333188c299eSJan Kara void *mapped_data, 4334188c299eSJan Kara size_t size)) 4335188c299eSJan Kara { 4336188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4337188c299eSJan Kara 4338188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4339188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4340188c299eSJan Kara } 4341188c299eSJan Kara 43427edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4343ac27a0ecSDave Kleikamp { 43447edfd85bSLukas Czerner if (!sbi) 43457edfd85bSLukas Czerner return; 43467edfd85bSLukas Czerner 43477edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 43487edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43497edfd85bSLukas Czerner kfree(sbi); 43507edfd85bSLukas Czerner } 43517edfd85bSLukas Czerner 43527edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43537edfd85bSLukas Czerner { 43547edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43557edfd85bSLukas Czerner 43567edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43577edfd85bSLukas Czerner if (!sbi) 43587edfd85bSLukas Czerner return NULL; 43597edfd85bSLukas Czerner 43603acbdbf4SLinus Torvalds sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off); 43617edfd85bSLukas Czerner 43627edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43637edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43647edfd85bSLukas Czerner 43657edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43667edfd85bSLukas Czerner goto err_out; 43677edfd85bSLukas Czerner 43687edfd85bSLukas Czerner sb->s_fs_info = sbi; 43697edfd85bSLukas Czerner sbi->s_sb = sb; 43707edfd85bSLukas Czerner return sbi; 43717edfd85bSLukas Czerner err_out: 43727edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43737edfd85bSLukas Czerner kfree(sbi); 43747edfd85bSLukas Czerner return NULL; 43757edfd85bSLukas Czerner } 43767edfd85bSLukas Czerner 4377960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 43787edfd85bSLukas Czerner { 43791d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4380617ba13bSMingming Cao struct ext4_super_block *es = NULL; 43817edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 43827c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4383617ba13bSMingming Cao ext4_fsblk_t block; 438470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4385ac27a0ecSDave Kleikamp unsigned long offset = 0; 4386ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4387ac27a0ecSDave Kleikamp struct inode *root; 4388dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4389281b5995STheodore Ts'o int blocksize, clustersize; 43904ec11028STheodore Ts'o unsigned int db_count; 43914ec11028STheodore Ts'o unsigned int i; 4392ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4393bd81d8eeSLaurent Vivier __u64 blocks_count; 439407aa2ea1SLukas Czerner int err = 0; 4395bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 43967edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4397960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 4398b237e304SHarshad Shirwadkar 4399b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 44007edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 44017edfd85bSLukas Czerner ctx->mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4402ac27a0ecSDave Kleikamp 4403240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4404f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 44058446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4406ac27a0ecSDave Kleikamp 440707aa2ea1SLukas Czerner /* -EINVAL is default */ 4408dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4409617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4410ac27a0ecSDave Kleikamp if (!blocksize) { 4411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4412ac27a0ecSDave Kleikamp goto out_fail; 4413ac27a0ecSDave Kleikamp } 4414ac27a0ecSDave Kleikamp 4415ac27a0ecSDave Kleikamp /* 4416617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4417ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4418ac27a0ecSDave Kleikamp */ 4419617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 44207edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 442170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4422ac27a0ecSDave Kleikamp } else { 44237edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4424ac27a0ecSDave Kleikamp } 4425ac27a0ecSDave Kleikamp 44268394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44278394a6abSzhangyi (F) if (IS_ERR(bh)) { 4428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 44298394a6abSzhangyi (F) ret = PTR_ERR(bh); 4430ac27a0ecSDave Kleikamp goto out_fail; 4431ac27a0ecSDave Kleikamp } 4432ac27a0ecSDave Kleikamp /* 4433ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4434617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4435ac27a0ecSDave Kleikamp */ 44362716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4437ac27a0ecSDave Kleikamp sbi->s_es = es; 4438ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4439617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4440617ba13bSMingming Cao goto cantfind_ext4; 4441afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4442ac27a0ecSDave Kleikamp 4443feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4444e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4445e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4446363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4447feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4448feb0ab32SDarrick J. Wong 4449d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4450d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4451d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4452d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4453d25425f8SDarrick J. Wong silent = 1; 4454d25425f8SDarrick J. Wong goto cantfind_ext4; 4455d25425f8SDarrick J. Wong } 445602f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 445702f310fcSJan Kara ext4_orphan_file_block_trigger); 4458d25425f8SDarrick J. Wong 44590441984aSDarrick J. Wong /* Load the checksum driver */ 44600441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 44610441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 44620441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 44630441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 44640441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 44650441984aSDarrick J. Wong goto failed_mount; 44660441984aSDarrick J. Wong } 44670441984aSDarrick J. Wong 4468a9c47317SDarrick J. Wong /* Check superblock checksum */ 4469a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4470a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4471a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4472a9c47317SDarrick J. Wong silent = 1; 44736a797d27SDarrick J. Wong ret = -EFSBADCRC; 4474a9c47317SDarrick J. Wong goto cantfind_ext4; 4475a9c47317SDarrick J. Wong } 4476a9c47317SDarrick J. Wong 4477a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4478e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 44798c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4480dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4481a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4482a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4483a9c47317SDarrick J. Wong 4484ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4485ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4486fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4487617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4488fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 448987f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4490fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4491617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4492fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4493ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4494fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 449503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4496fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 44972e7842b8SHugh Dickins #endif 4498995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4499995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 450098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 450198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 450298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 450398c1a759SDarrick J. Wong 4504617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4505fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4506617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4507fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4508617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4509fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4510ac27a0ecSDave Kleikamp 4511617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4512fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4513bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4514fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4515bb4f397aSAneesh Kumar K.V else 4516fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 451745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4518fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 45198b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4520fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4521ac27a0ecSDave Kleikamp 452208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 452308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 452430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 452530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 452630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4527ac27a0ecSDave Kleikamp 45288b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4529fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4530ac27a0ecSDave Kleikamp 45311e2462f9SMingming Cao /* 4532dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4533dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4534dd919b98SAneesh Kumar K.V */ 4535bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 45368b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4537fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4538dd919b98SAneesh Kumar K.V 453951ce6511SLukas Czerner /* 454051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 454151ce6511SLukas Czerner * no mount option specified. 454251ce6511SLukas Czerner */ 454351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 454451ce6511SLukas Czerner 4545c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4546c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4547c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4548c9200760STheodore Ts'o "Invalid log block size: %u", 4549c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4550c9200760STheodore Ts'o goto failed_mount; 4551c9200760STheodore Ts'o } 4552c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4553c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4554c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4555c9200760STheodore Ts'o "Invalid log cluster size: %u", 4556c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4557c9200760STheodore Ts'o goto failed_mount; 4558c9200760STheodore Ts'o } 4559c9200760STheodore Ts'o 4560c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4561626b035bSRitesh Harjani 4562626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4563626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4564626b035bSRitesh Harjani 45659803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 45669803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 45679803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 45689803387cSTheodore Ts'o } else { 45699803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 45709803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 45719803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 45729803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 45739803387cSTheodore Ts'o sbi->s_first_ino); 45749803387cSTheodore Ts'o goto failed_mount; 45759803387cSTheodore Ts'o } 45769803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 45779803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 45789803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 45799803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45809803387cSTheodore Ts'o "unsupported inode size: %d", 45819803387cSTheodore Ts'o sbi->s_inode_size); 45824f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 45839803387cSTheodore Ts'o goto failed_mount; 45849803387cSTheodore Ts'o } 45859803387cSTheodore Ts'o /* 45869803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 45879803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 45889803387cSTheodore Ts'o * field should suffice to ensure we have extra space 45899803387cSTheodore Ts'o * for all three. 45909803387cSTheodore Ts'o */ 45919803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45929803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45939803387cSTheodore Ts'o sb->s_time_gran = 1; 45949803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45959803387cSTheodore Ts'o } else { 45969803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 45979803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45989803387cSTheodore Ts'o } 45999803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 46009803387cSTheodore Ts'o } 46019803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 46029803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 46039803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 46049803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 46059803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 46069803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 46079803387cSTheodore Ts'o 46089803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 46099803387cSTheodore Ts'o if (v > max) { 46109803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46119803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 46129803387cSTheodore Ts'o goto failed_mount; 46139803387cSTheodore Ts'o } 46149803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46159803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46169803387cSTheodore Ts'o 46179803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 46189803387cSTheodore Ts'o if (v > max) { 46199803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46209803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 46219803387cSTheodore Ts'o goto failed_mount; 46229803387cSTheodore Ts'o } 46239803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46249803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46259803387cSTheodore Ts'o } 46269803387cSTheodore Ts'o } 46279803387cSTheodore Ts'o 46287edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 46297edfd85bSLukas Czerner if (err < 0) 46305aee0f8aSTheodore Ts'o goto failed_mount; 46317edfd85bSLukas Czerner 46325a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 46337edfd85bSLukas Czerner 46347edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 46357edfd85bSLukas Czerner if (err < 0) 46367edfd85bSLukas Czerner goto failed_mount; 46377edfd85bSLukas Czerner 46387edfd85bSLukas Czerner err = ext4_apply_options(fc, sb); 46397edfd85bSLukas Czerner if (err < 0) 4640ac27a0ecSDave Kleikamp goto failed_mount; 4641ac27a0ecSDave Kleikamp 46425298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 4643f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4644c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4645c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4646aa8bf298SChristoph Hellwig __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 4647c83ad55eSGabriel Krisman Bertazi 4648aa8bf298SChristoph Hellwig encoding_info = ext4_sb_read_encoding(es); 4649aa8bf298SChristoph Hellwig if (!encoding_info) { 4650c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4651c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4652c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4653c83ad55eSGabriel Krisman Bertazi } 4654c83ad55eSGabriel Krisman Bertazi 4655c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4656c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4657c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 465849bd03ccSChristoph Hellwig "can't mount with superblock charset: %s-%u.%u.%u " 4659c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 466049bd03ccSChristoph Hellwig encoding_info->name, 466149bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 466249bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 466349bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 4664c83ad55eSGabriel Krisman Bertazi encoding_flags); 4665c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4666c83ad55eSGabriel Krisman Bertazi } 4667c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 466849bd03ccSChristoph Hellwig "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 466949bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 467049bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 467149bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 467249bd03ccSChristoph Hellwig encoding_flags); 4673c83ad55eSGabriel Krisman Bertazi 4674f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4675f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4676c83ad55eSGabriel Krisman Bertazi } 4677c83ad55eSGabriel Krisman Bertazi #endif 4678c83ad55eSGabriel Krisman Bertazi 467956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4680556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4681781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4682244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4683556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 468456889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 468556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 468656889787STheodore Ts'o "both data=journal and delalloc"); 468756889787STheodore Ts'o goto failed_mount; 468856889787STheodore Ts'o } 4689fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4690923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4691923ae0ffSRoss Zwisler "both data=journal and dax"); 4692923ae0ffSRoss Zwisler goto failed_mount; 4693923ae0ffSRoss Zwisler } 469473b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 469573b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 469673b92a2aSSergey Karamov "encrypted files will use data=ordered " 469773b92a2aSSergey Karamov "instead of data journaling mode"); 469873b92a2aSSergey Karamov } 469956889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 470056889787STheodore Ts'o clear_opt(sb, DELALLOC); 4701001e4a87STejun Heo } else { 4702001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 470356889787STheodore Ts'o } 470456889787STheodore Ts'o 47051751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 47061751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4707ac27a0ecSDave Kleikamp 4708617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4709e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4710e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4711e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4712b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4713b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4714b31e1552SEric Sandeen "running e2fsck is recommended"); 4715469108ffSTheodore Tso 4716ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4717ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4718e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4719ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4720ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4721ed3654ebSTheodore Ts'o goto failed_mount; 4722ed3654ebSTheodore Ts'o } 4723dec214d0STahsin Erdogan 4724dec214d0STahsin Erdogan /* 4725dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4726dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4727dec214d0STahsin Erdogan */ 4728dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4729dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4730dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4731dec214d0STahsin Erdogan goto failed_mount; 4732dec214d0STahsin Erdogan } 4733ed3654ebSTheodore Ts'o } 4734ed3654ebSTheodore Ts'o 47352035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 47362035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 47372035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 47382035e776STheodore Ts'o "using the ext4 subsystem"); 47392035e776STheodore Ts'o else { 47400d9366d6SEric Sandeen /* 47410d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47420d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 47430d9366d6SEric Sandeen */ 47440d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47450d9366d6SEric Sandeen goto failed_mount; 47462035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 47472035e776STheodore Ts'o "to feature incompatibilities"); 47482035e776STheodore Ts'o goto failed_mount; 47492035e776STheodore Ts'o } 47502035e776STheodore Ts'o } 47512035e776STheodore Ts'o 47522035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 47532035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 47542035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 47552035e776STheodore Ts'o "using the ext4 subsystem"); 47562035e776STheodore Ts'o else { 47570d9366d6SEric Sandeen /* 47580d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47590d9366d6SEric Sandeen * it's actually an ext4 filesystem. 47600d9366d6SEric Sandeen */ 47610d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47620d9366d6SEric Sandeen goto failed_mount; 47632035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 47642035e776STheodore Ts'o "to feature incompatibilities"); 47652035e776STheodore Ts'o goto failed_mount; 47662035e776STheodore Ts'o } 47672035e776STheodore Ts'o } 47682035e776STheodore Ts'o 4769469108ffSTheodore Tso /* 4770ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4771ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4772ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4773ac27a0ecSDave Kleikamp */ 4774bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4775ac27a0ecSDave Kleikamp goto failed_mount; 4776a13fb1a4SEric Sandeen 47775b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 47785b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 47795b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 47805b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 47815b9554dcSTheodore Ts'o goto failed_mount; 47825b9554dcSTheodore Ts'o } 47835b9554dcSTheodore Ts'o 478489b93a7bSChristoph Hellwig if (sbi->s_daxdev) { 47857b0800d0SChristoph Hellwig if (blocksize == PAGE_SIZE) 4786a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 47877b0800d0SChristoph Hellwig else 47887b0800d0SChristoph Hellwig ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 47897b0800d0SChristoph Hellwig } 4790a8ab6d38SIra Weiny 4791fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4792559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4793559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4794559db4c6SRoss Zwisler " that may contain inline data"); 4795361d24d4SEric Sandeen goto failed_mount; 4796559db4c6SRoss Zwisler } 4797a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 479824f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4799361d24d4SEric Sandeen "DAX unsupported by block device."); 4800361d24d4SEric Sandeen goto failed_mount; 480124f3478dSDan Williams } 4802923ae0ffSRoss Zwisler } 4803923ae0ffSRoss Zwisler 4804e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 48056ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 48066ddb2447STheodore Ts'o es->s_encryption_level); 48076ddb2447STheodore Ts'o goto failed_mount; 48086ddb2447STheodore Ts'o } 48096ddb2447STheodore Ts'o 4810ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4811afd09b61SAlexey Makhalov /* 4812afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4813afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4814afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4815afd09b61SAlexey Makhalov */ 4816afd09b61SAlexey Makhalov brelse(bh); 4817ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4818ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4820ce40733cSAneesh Kumar K.V blocksize); 4821afd09b61SAlexey Makhalov bh = NULL; 4822ac27a0ecSDave Kleikamp goto failed_mount; 4823ac27a0ecSDave Kleikamp } 4824ac27a0ecSDave Kleikamp 48257edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 482670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 48278394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 48288394a6abSzhangyi (F) if (IS_ERR(bh)) { 4829b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4830b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 48318394a6abSzhangyi (F) ret = PTR_ERR(bh); 48328394a6abSzhangyi (F) bh = NULL; 4833ac27a0ecSDave Kleikamp goto failed_mount; 4834ac27a0ecSDave Kleikamp } 48352716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4836ac27a0ecSDave Kleikamp sbi->s_es = es; 4837617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4838b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4839b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4840ac27a0ecSDave Kleikamp goto failed_mount; 4841ac27a0ecSDave Kleikamp } 4842ac27a0ecSDave Kleikamp } 4843ac27a0ecSDave Kleikamp 4844e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4845f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4846f287a1a5STheodore Ts'o has_huge_files); 4847f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4848ac27a0ecSDave Kleikamp 48490d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4850e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 48518fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 48520d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4853d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4854b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4855b31e1552SEric Sandeen "unsupported descriptor size %lu", 48560d1ee42fSAlexandre Ratchov sbi->s_desc_size); 48570d1ee42fSAlexandre Ratchov goto failed_mount; 48580d1ee42fSAlexandre Ratchov } 48590d1ee42fSAlexandre Ratchov } else 48600d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 48610b8e58a1SAndreas Dilger 4862ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4863ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 48640b8e58a1SAndreas Dilger 4865617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4866ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4867617ba13bSMingming Cao goto cantfind_ext4; 4868cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4869cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4870cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4871b9c538daSJosh Triplett sbi->s_inodes_per_group); 4872cd6bb35bSTheodore Ts'o goto failed_mount; 4873cd6bb35bSTheodore Ts'o } 4874ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4875ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 48760d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4877ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4878ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4879e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4880e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 48810b8e58a1SAndreas Dilger 4882ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4883ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4884ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4885e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4886f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4887f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4888f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4889f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4890f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4891bc98a42cSDavid Howells if (!sb_rdonly(sb)) 489223301410STheodore Ts'o es->s_flags |= 489323301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4894f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4895f99b2589STheodore Ts'o #else 4896bc98a42cSDavid Howells if (!sb_rdonly(sb)) 489723301410STheodore Ts'o es->s_flags |= 489823301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4899f99b2589STheodore Ts'o #endif 4900f99b2589STheodore Ts'o } 490123301410STheodore Ts'o } 4902ac27a0ecSDave Kleikamp 4903281b5995STheodore Ts'o /* Handle clustersize */ 4904281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4905ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4906281b5995STheodore Ts'o if (clustersize < blocksize) { 4907281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4908281b5995STheodore Ts'o "cluster size (%d) smaller than " 4909281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4910281b5995STheodore Ts'o goto failed_mount; 4911281b5995STheodore Ts'o } 4912281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4913281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4914281b5995STheodore Ts'o sbi->s_clusters_per_group = 4915281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4916281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4917281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4918281b5995STheodore Ts'o "#clusters per group too big: %lu", 4919281b5995STheodore Ts'o sbi->s_clusters_per_group); 4920281b5995STheodore Ts'o goto failed_mount; 4921281b5995STheodore Ts'o } 4922281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4923281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4924281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4925281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4926281b5995STheodore Ts'o sbi->s_blocks_per_group, 4927281b5995STheodore Ts'o sbi->s_clusters_per_group); 4928281b5995STheodore Ts'o goto failed_mount; 4929281b5995STheodore Ts'o } 4930281b5995STheodore Ts'o } else { 4931281b5995STheodore Ts'o if (clustersize != blocksize) { 4932bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4933bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4934bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4935bfe0a5f4STheodore Ts'o goto failed_mount; 4936281b5995STheodore Ts'o } 4937ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4938b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4939b31e1552SEric Sandeen "#blocks per group too big: %lu", 4940ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4941ac27a0ecSDave Kleikamp goto failed_mount; 4942ac27a0ecSDave Kleikamp } 4943281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4944281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4945281b5995STheodore Ts'o } 4946281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4947281b5995STheodore Ts'o 4948960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4949960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4950960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4951960fd856STheodore Ts'o 4952bf43d84bSEric Sandeen /* 4953bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4954bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4955bf43d84bSEric Sandeen */ 49565a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 495730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 49585a9ae68aSDarrick J. Wong if (err) { 4959b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4960bf43d84bSEric Sandeen " too large to mount safely on this system"); 4961ac27a0ecSDave Kleikamp goto failed_mount; 4962ac27a0ecSDave Kleikamp } 4963ac27a0ecSDave Kleikamp 4964617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4965617ba13bSMingming Cao goto cantfind_ext4; 4966e7c95593SEric Sandeen 49670f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 49685513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 49690f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4970b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4971b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 49720f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 49730f2ddca6SFrom: Thiemo Nagel goto failed_mount; 49740f2ddca6SFrom: Thiemo Nagel } 49750f2ddca6SFrom: Thiemo Nagel 49764ec11028STheodore Ts'o /* 49774ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 49784ec11028STheodore Ts'o * of the filesystem. 49794ec11028STheodore Ts'o */ 49804ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4981b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4982b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4983e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 49844ec11028STheodore Ts'o ext4_blocks_count(es)); 4985e7c95593SEric Sandeen goto failed_mount; 4986e7c95593SEric Sandeen } 4987bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4988bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4989bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4990bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4991bfe0a5f4STheodore Ts'o goto failed_mount; 4992bfe0a5f4STheodore Ts'o } 4993bfe0a5f4STheodore Ts'o 4994bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4995bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4996bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4997bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 49984ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4999df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 50004ec11028STheodore Ts'o "(block count %llu, first data block %u, " 5001df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 50024ec11028STheodore Ts'o ext4_blocks_count(es), 50034ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 50044ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 50054ec11028STheodore Ts'o goto failed_mount; 50064ec11028STheodore Ts'o } 5007bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 5008fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 5009fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 50109e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 50119e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 50129e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 50139e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 50149e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 50159e463084STheodore Ts'o ret = -EINVAL; 50169e463084STheodore Ts'o goto failed_mount; 50179e463084STheodore Ts'o } 5018617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 5019617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 50203a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 50212ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 50223a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 50233a4b77cdSEryu Guan "first meta block group too large: %u " 50243a4b77cdSEryu Guan "(group descriptor block count %u)", 50253a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 50263a4b77cdSEryu Guan goto failed_mount; 50273a4b77cdSEryu Guan } 50283a4b77cdSEryu Guan } 50291d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 50301d0c3924STheodore Ts'o kvmalloc_array(db_count, 5031f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 50321d0c3924STheodore Ts'o GFP_KERNEL)); 5033ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 5034b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 50352cde417dSTheodore Ts'o ret = -ENOMEM; 5036ac27a0ecSDave Kleikamp goto failed_mount; 5037ac27a0ecSDave Kleikamp } 5038ac27a0ecSDave Kleikamp 5039705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 5040ac27a0ecSDave Kleikamp 504185c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 504285c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 504385c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 50445df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 504585c8f176SAndrew Perepechko } 504685c8f176SAndrew Perepechko 5047ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 50481d0c3924STheodore Ts'o struct buffer_head *bh; 50491d0c3924STheodore Ts'o 505070bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 50518394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 50528394a6abSzhangyi (F) if (IS_ERR(bh)) { 5053b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5054b31e1552SEric Sandeen "can't read group descriptor %d", i); 5055ac27a0ecSDave Kleikamp db_count = i; 50568394a6abSzhangyi (F) ret = PTR_ERR(bh); 5057ac27a0ecSDave Kleikamp goto failed_mount2; 5058ac27a0ecSDave Kleikamp } 50591d0c3924STheodore Ts'o rcu_read_lock(); 50601d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 50611d0c3924STheodore Ts'o rcu_read_unlock(); 5062ac27a0ecSDave Kleikamp } 506344de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 5064829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 5065b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 50666a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 5067f9ae9cf5STheodore Ts'o goto failed_mount2; 5068ac27a0ecSDave Kleikamp } 5069772cb7c8SJose R. Santos 5070235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5071c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5072c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 507304496411STao Ma 5074a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5075eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5076ce7e010aSTheodore Ts'o goto failed_mount3; 5077ce7e010aSTheodore Ts'o 5078c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 507967a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5080c9de560dSAlex Tomas 5081f9ae9cf5STheodore Ts'o /* 5082f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5083f9ae9cf5STheodore Ts'o */ 5084f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5085617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5086617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5087643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5088a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5089ffcc4182SEric Biggers #endif 5090c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5091c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5092c93d8f88SEric Biggers #endif 5093ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5094617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5095e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 50961fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5097262b4662SJan Kara else 5098262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5099689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5100ac27a0ecSDave Kleikamp #endif 510185787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5102f2fa2ffcSAneesh Kumar K.V 5103ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 51043b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5105ac27a0ecSDave Kleikamp 5106aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5107aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5108aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5109aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5110aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5111aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5112aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 51139b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 5114e85c81baSXin Yin sbi->s_fc_ineligible_tid = 0; 5115aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5116aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 51178016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 51188016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 51198016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 51208016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 51218016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 51228016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 51238016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5124aa75f4d3SHarshad Shirwadkar 5125ac27a0ecSDave Kleikamp sb->s_root = NULL; 5126ac27a0ecSDave Kleikamp 5127ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 512802f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5129e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5130ac27a0ecSDave Kleikamp 5131bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5132c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 513350460fe8SDarrick J. Wong goto failed_mount3a; 5134c5e06d10SJohann Lombardi 5135ac27a0ecSDave Kleikamp /* 5136ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5137ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5138ac27a0ecSDave Kleikamp */ 5139e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 51407edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 51414753d8a2STheodore Ts'o if (err) 514250460fe8SDarrick J. Wong goto failed_mount3a; 5143bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5144e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5145b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5146b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5147744692dcSJiaying Zhang goto failed_mount_wq; 5148ac27a0ecSDave Kleikamp } else { 51491e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 51501e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 51511e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51521e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 51531e381f60SDmitry Monakhov goto failed_mount_wq; 51541e381f60SDmitry Monakhov } 51551e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 51561e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51571e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 51581e381f60SDmitry Monakhov goto failed_mount_wq; 51591e381f60SDmitry Monakhov } 51601e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 51611e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51621e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 51631e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 51641e381f60SDmitry Monakhov goto failed_mount_wq; 51651e381f60SDmitry Monakhov } 51661e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 51671e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 51681e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51691e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 51701e381f60SDmitry Monakhov goto failed_mount_wq; 51711e381f60SDmitry Monakhov } 517250b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 51731e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5174fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5175995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 51760390131bSFrank Mayhar sbi->s_journal = NULL; 51770390131bSFrank Mayhar needs_recovery = 0; 51780390131bSFrank Mayhar goto no_journal; 5179ac27a0ecSDave Kleikamp } 5180ac27a0ecSDave Kleikamp 5181e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5182eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5183eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5184b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5185744692dcSJiaying Zhang goto failed_mount_wq; 5186eb40a09cSJose R. Santos } 5187eb40a09cSJose R. Santos 518825ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 518925ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 519025ed6e8aSDarrick J. Wong "feature set"); 519125ed6e8aSDarrick J. Wong goto failed_mount_wq; 5192d4da6c9cSLinus Torvalds } 5193818d276cSGirish Shilamkar 5194a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5195a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5196a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5197a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5198a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5199a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5200a1e5e465SHarshad Shirwadkar } 5201a1e5e465SHarshad Shirwadkar 5202ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5203ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5204ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5205ac27a0ecSDave Kleikamp case 0: 5206ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 520763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 520863f57933SAndrew Morton * cope, else JOURNAL_DATA 520963f57933SAndrew Morton */ 5210dab291afSMingming Cao if (jbd2_journal_check_available_features 521127f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5212fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 521327f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 521427f394a7STyson Nottingham } else { 5215fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 521627f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 521727f394a7STyson Nottingham } 5218ac27a0ecSDave Kleikamp break; 5219ac27a0ecSDave Kleikamp 5220617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5221617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5222dab291afSMingming Cao if (!jbd2_journal_check_available_features 5223dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5224b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5225b31e1552SEric Sandeen "requested data journaling mode"); 5226744692dcSJiaying Zhang goto failed_mount_wq; 5227ac27a0ecSDave Kleikamp } 52285a150bdeSGustavo A. R. Silva break; 5229ac27a0ecSDave Kleikamp default: 5230ac27a0ecSDave Kleikamp break; 5231ac27a0ecSDave Kleikamp } 5232ab04df78SJan Kara 5233ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5234ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5235ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5236ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5237ab04df78SJan Kara goto failed_mount_wq; 5238ab04df78SJan Kara } 5239ab04df78SJan Kara 52407edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5241ac27a0ecSDave Kleikamp 5242342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5243afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5244342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5245afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 524618aadd47SBobi Jam 5247ce7e010aSTheodore Ts'o no_journal: 5248cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 524947387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 525047387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5251cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5252cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 52539c191f70ST Makphaibulchoke goto failed_mount_wq; 52549c191f70ST Makphaibulchoke } 52559c191f70ST Makphaibulchoke 5256dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5257dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5258dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5259dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5260dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5261dec214d0STahsin Erdogan goto failed_mount_wq; 5262dec214d0STahsin Erdogan } 5263dec214d0STahsin Erdogan } 5264cdb7ee4cSTahsin Erdogan } 5265dec214d0STahsin Erdogan 5266c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5267c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5268c93d8f88SEric Biggers goto failed_mount_wq; 5269c93d8f88SEric Biggers } 5270c93d8f88SEric Biggers 5271bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5272e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5273e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 52744392fbc4SJan Kara ext4_commit_super(sb); 52756ddb2447STheodore Ts'o } 52766ddb2447STheodore Ts'o 5277fd89d5f2STejun Heo /* 5278952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5279952fc18eSTheodore Ts'o * superblock if present. 5280952fc18eSTheodore Ts'o */ 5281952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 5282952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5283952fc18eSTheodore Ts'o else { 528407aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 528507aa2ea1SLukas Czerner if (err) 5286952fc18eSTheodore Ts'o goto failed_mount_wq; 5287952fc18eSTheodore Ts'o } 5288952fc18eSTheodore Ts'o 5289952fc18eSTheodore Ts'o /* 5290fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5291fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5292fd89d5f2STejun Heo */ 52932e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 52942e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 52952e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 52962e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 529707aa2ea1SLukas Czerner ret = -ENOMEM; 52982e8fa54eSJan Kara goto failed_mount4; 52992e8fa54eSJan Kara } 53002e8fa54eSJan Kara 5301ac27a0ecSDave Kleikamp /* 5302dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5303ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5304ac27a0ecSDave Kleikamp */ 5305ac27a0ecSDave Kleikamp 53068a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 53071d1fe1eeSDavid Howells if (IS_ERR(root)) { 5308b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 53091d1fe1eeSDavid Howells ret = PTR_ERR(root); 531032a9bb57SManish Katiyar root = NULL; 5311ac27a0ecSDave Kleikamp goto failed_mount4; 5312ac27a0ecSDave Kleikamp } 5313ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5314b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 531594bf608aSAl Viro iput(root); 5316ac27a0ecSDave Kleikamp goto failed_mount4; 5317ac27a0ecSDave Kleikamp } 5318b886ee3eSGabriel Krisman Bertazi 531948fde701SAl Viro sb->s_root = d_make_root(root); 53201d1fe1eeSDavid Howells if (!sb->s_root) { 5321b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 53221d1fe1eeSDavid Howells ret = -ENOMEM; 53231d1fe1eeSDavid Howells goto failed_mount4; 53241d1fe1eeSDavid Howells } 5325ac27a0ecSDave Kleikamp 5326c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5327c89128a0SJaegeuk Kim if (ret == -EROFS) { 53281751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5329c89128a0SJaegeuk Kim ret = 0; 5330c89128a0SJaegeuk Kim } else if (ret) 5331c89128a0SJaegeuk Kim goto failed_mount4a; 5332ef7f3835SKalpak Shah 5333b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 533427dd4385SLukas Czerner 53350f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 53366fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 53376fd058f7STheodore Ts'o if (err) { 5338b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5339fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5340f9ae9cf5STheodore Ts'o goto failed_mount4a; 5341f9ae9cf5STheodore Ts'o } 53420f5bde1dSJan Kara } 53438016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5344f9ae9cf5STheodore Ts'o 5345f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5346196e402aSHarshad Shirwadkar 5347196e402aSHarshad Shirwadkar /* 5348196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5349196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5350196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5351196e402aSHarshad Shirwadkar */ 53527edfd85bSLukas Czerner if (ctx->mb_optimize_scan == 1) 5353196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 53547edfd85bSLukas Czerner else if (ctx->mb_optimize_scan == 0) 5355196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5356196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5357196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5358196e402aSHarshad Shirwadkar 5359f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5360f9ae9cf5STheodore Ts'o if (err) { 5361f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5362f9ae9cf5STheodore Ts'o err); 5363dcf2d804STao Ma goto failed_mount5; 5364c2774d84SAneesh Kumar K.V } 5365c2774d84SAneesh Kumar K.V 5366027f14f5STheodore Ts'o /* 5367027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5368027f14f5STheodore Ts'o * mballoc is initialized 5369027f14f5STheodore Ts'o */ 5370027f14f5STheodore Ts'o if (sbi->s_journal) 5371027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5372027f14f5STheodore Ts'o ext4_journal_commit_callback; 5373027f14f5STheodore Ts'o 5374d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5375d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5376d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5377908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5378908c7f19STejun Heo GFP_KERNEL); 5379d5e03cbbSTheodore Ts'o if (!err) { 5380d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5381d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5382908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5383908c7f19STejun Heo GFP_KERNEL); 5384d5e03cbbSTheodore Ts'o } 5385b2bbb92fSJan Kara /* 5386b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5387b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5388b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5389b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5390b2bbb92fSJan Kara * after it is mounted can fail. 5391b2bbb92fSJan Kara */ 5392b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5393d5e03cbbSTheodore Ts'o if (!err) 5394d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5395908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5396d5e03cbbSTheodore Ts'o if (!err) 5397908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5398908c7f19STejun Heo GFP_KERNEL); 5399c8585c6fSDaeho Jeong if (!err) 5400efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5401efc61345SEric Whitney GFP_KERNEL); 5402efc61345SEric Whitney if (!err) 5403bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5404c8585c6fSDaeho Jeong 5405d5e03cbbSTheodore Ts'o if (err) { 5406d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5407d5e03cbbSTheodore Ts'o goto failed_mount6; 5408d5e03cbbSTheodore Ts'o } 5409d5e03cbbSTheodore Ts'o 5410e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5411d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5412d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5413d5e03cbbSTheodore Ts'o "unable to initialize " 5414d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54158f6840c4SYang Yingliang ret = -ENOMEM; 5416d5e03cbbSTheodore Ts'o goto failed_mount6; 5417d5e03cbbSTheodore Ts'o } 5418d5e03cbbSTheodore Ts'o 5419bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5420bfff6873SLukas Czerner if (err) 5421dcf2d804STao Ma goto failed_mount6; 5422bfff6873SLukas Czerner 5423b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5424dcf2d804STao Ma if (err) 5425dcf2d804STao Ma goto failed_mount7; 54263197ebdbSTheodore Ts'o 542702f310fcSJan Kara err = ext4_init_orphan_info(sb); 542802f310fcSJan Kara if (err) 542902f310fcSJan Kara goto failed_mount8; 54309b2ff357SJan Kara #ifdef CONFIG_QUOTA 54319b2ff357SJan Kara /* Enable quota usage during mount. */ 5432bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 54339b2ff357SJan Kara err = ext4_enable_quotas(sb); 54349b2ff357SJan Kara if (err) 543502f310fcSJan Kara goto failed_mount9; 54369b2ff357SJan Kara } 54379b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 54389b2ff357SJan Kara 5439bc71726cSzhangyi (F) /* 5440bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5441bc71726cSzhangyi (F) * used to detect the metadata async write error. 5442bc71726cSzhangyi (F) */ 5443bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5444bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5445bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5446bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5447617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5448617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5449617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 54500390131bSFrank Mayhar if (needs_recovery) { 5451b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 545211215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 545311215630SJan Kara if (err) 545402f310fcSJan Kara goto failed_mount9; 54550390131bSFrank Mayhar } 54560390131bSFrank Mayhar 545779add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 545879add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 545979add3a3SLukas Czerner if (!blk_queue_discard(q)) 546079add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 546179add3a3SLukas Czerner "mounting with \"discard\" option, but " 546279add3a3SLukas Czerner "the device does not support discard"); 546379add3a3SLukas Czerner } 546479add3a3SLukas Czerner 546566e61a9eSTheodore Ts'o if (es->s_error_count) 546666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5467ac27a0ecSDave Kleikamp 5468efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5469efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5470efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5471efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 54721cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 54731cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5474efbed4dcSTheodore Ts'o 5475ac27a0ecSDave Kleikamp return 0; 5476ac27a0ecSDave Kleikamp 5477617ba13bSMingming Cao cantfind_ext4: 5478ac27a0ecSDave Kleikamp if (!silent) 5479b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5480ac27a0ecSDave Kleikamp goto failed_mount; 5481ac27a0ecSDave Kleikamp 548202f310fcSJan Kara failed_mount9: 548302f310fcSJan Kara ext4_release_orphan_info(sb); 548472ba7450STheodore Ts'o failed_mount8: 5485ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5486cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5487dcf2d804STao Ma failed_mount7: 5488dcf2d804STao Ma ext4_unregister_li_request(sb); 5489dcf2d804STao Ma failed_mount6: 5490f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 54917c990728SSuraj Jitindar Singh rcu_read_lock(); 54927c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 54937c990728SSuraj Jitindar Singh if (flex_groups) { 54947c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 54957c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 54967c990728SSuraj Jitindar Singh kvfree(flex_groups); 54977c990728SSuraj Jitindar Singh } 54987c990728SSuraj Jitindar Singh rcu_read_unlock(); 5499d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5500d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5501d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5502d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5503efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5504bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 550500764937SAzat Khuzhin failed_mount5: 5506f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5507f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5508f9ae9cf5STheodore Ts'o failed_mount4a: 550994bf608aSAl Viro dput(sb->s_root); 551032a9bb57SManish Katiyar sb->s_root = NULL; 551194bf608aSAl Viro failed_mount4: 5512b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55132e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55142e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55154c0425ffSMingming Cao failed_mount_wq: 5516dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5517dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 551850c15df6SChengguang Xu 551947387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 552047387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 552150c15df6SChengguang Xu 55220390131bSFrank Mayhar if (sbi->s_journal) { 5523bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5524bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5525dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 552647b4a50bSJan Kara sbi->s_journal = NULL; 55270390131bSFrank Mayhar } 552850460fe8SDarrick J. Wong failed_mount3a: 5529d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5530eb68d0e2SZheng Liu failed_mount3: 5531bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5532c92dc856SJan Kara flush_work(&sbi->s_error_work); 55332a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5534618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5535ac27a0ecSDave Kleikamp failed_mount2: 55361d0c3924STheodore Ts'o rcu_read_lock(); 55371d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5538ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 55391d0c3924STheodore Ts'o brelse(group_desc[i]); 55401d0c3924STheodore Ts'o kvfree(group_desc); 55411d0c3924STheodore Ts'o rcu_read_unlock(); 5542ac27a0ecSDave Kleikamp failed_mount: 55430441984aSDarrick J. Wong if (sbi->s_chksum_driver) 55440441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5545c83ad55eSGabriel Krisman Bertazi 55465298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5547f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5548c83ad55eSGabriel Krisman Bertazi #endif 5549c83ad55eSGabriel Krisman Bertazi 5550ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5551a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 55520ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5553ac27a0ecSDave Kleikamp #endif 5554ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5555afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5556ac27a0ecSDave Kleikamp brelse(bh); 5557afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5558ac27a0ecSDave Kleikamp out_fail: 5559ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 556007aa2ea1SLukas Czerner return err ? err : ret; 5561ac27a0ecSDave Kleikamp } 5562ac27a0ecSDave Kleikamp 5563cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 55647edfd85bSLukas Czerner { 5565cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 55667edfd85bSLukas Czerner struct ext4_sb_info *sbi; 55677edfd85bSLukas Czerner const char *descr; 5568cebe85d5SLukas Czerner int ret; 55697edfd85bSLukas Czerner 5570cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5571cebe85d5SLukas Czerner if (!sbi) 55727c268d4cSLukas Czerner return -ENOMEM; 5573cebe85d5SLukas Czerner 5574cebe85d5SLukas Czerner fc->s_fs_info = sbi; 55757edfd85bSLukas Czerner 55767edfd85bSLukas Czerner /* Cleanup superblock name */ 55777edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 55787edfd85bSLukas Czerner 55797edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5580cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5581cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 55827edfd85bSLukas Czerner 5583960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 55847edfd85bSLukas Czerner if (ret < 0) 55857edfd85bSLukas Czerner goto free_sbi; 55867edfd85bSLukas Czerner 5587cebe85d5SLukas Czerner if (sbi->s_journal) { 55887edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 55897edfd85bSLukas Czerner descr = " journalled data mode"; 55907edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 55917edfd85bSLukas Czerner descr = " ordered data mode"; 55927edfd85bSLukas Czerner else 55937edfd85bSLukas Czerner descr = " writeback data mode"; 55947edfd85bSLukas Czerner } else 55957edfd85bSLukas Czerner descr = "out journal"; 55967edfd85bSLukas Czerner 55977edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 55987edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5599cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 56007edfd85bSLukas Czerner 56017edfd85bSLukas Czerner return 0; 5602cebe85d5SLukas Czerner 56037edfd85bSLukas Czerner free_sbi: 56047edfd85bSLukas Czerner ext4_free_sbi(sbi); 5605cebe85d5SLukas Czerner fc->s_fs_info = NULL; 56067edfd85bSLukas Czerner return ret; 56077edfd85bSLukas Czerner } 56087edfd85bSLukas Czerner 5609cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5610cebe85d5SLukas Czerner { 5611cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5612cebe85d5SLukas Czerner } 5613cebe85d5SLukas Czerner 5614ac27a0ecSDave Kleikamp /* 5615ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5616ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5617ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5618ac27a0ecSDave Kleikamp */ 5619617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5620ac27a0ecSDave Kleikamp { 5621617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5622ac27a0ecSDave Kleikamp 5623ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 562430773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 562530773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 56266866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5627ac27a0ecSDave Kleikamp 5628a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5629ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5630dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5631ac27a0ecSDave Kleikamp else 5632dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 56335bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 56345bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 56355bf5683aSHidehiro Kawai else 56365bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5637a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5638ac27a0ecSDave Kleikamp } 5639ac27a0ecSDave Kleikamp 5640c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5641ac27a0ecSDave Kleikamp unsigned int journal_inum) 5642ac27a0ecSDave Kleikamp { 5643ac27a0ecSDave Kleikamp struct inode *journal_inode; 5644ac27a0ecSDave Kleikamp 5645c6cb7e77SEric Whitney /* 5646c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5647c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5648c6cb7e77SEric Whitney * will try to delete it. 5649c6cb7e77SEric Whitney */ 56508a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 56511d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5652b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5653ac27a0ecSDave Kleikamp return NULL; 5654ac27a0ecSDave Kleikamp } 5655ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5656ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5657ac27a0ecSDave Kleikamp iput(journal_inode); 5658b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5659ac27a0ecSDave Kleikamp return NULL; 5660ac27a0ecSDave Kleikamp } 5661ac27a0ecSDave Kleikamp 5662e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5663ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 56641d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5665b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5666ac27a0ecSDave Kleikamp iput(journal_inode); 5667ac27a0ecSDave Kleikamp return NULL; 5668ac27a0ecSDave Kleikamp } 5669c6cb7e77SEric Whitney return journal_inode; 5670c6cb7e77SEric Whitney } 5671c6cb7e77SEric Whitney 5672c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5673c6cb7e77SEric Whitney unsigned int journal_inum) 5674c6cb7e77SEric Whitney { 5675c6cb7e77SEric Whitney struct inode *journal_inode; 5676c6cb7e77SEric Whitney journal_t *journal; 5677c6cb7e77SEric Whitney 567811215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 567911215630SJan Kara return NULL; 5680c6cb7e77SEric Whitney 5681c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5682c6cb7e77SEric Whitney if (!journal_inode) 5683c6cb7e77SEric Whitney return NULL; 5684ac27a0ecSDave Kleikamp 5685dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5686ac27a0ecSDave Kleikamp if (!journal) { 5687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5688ac27a0ecSDave Kleikamp iput(journal_inode); 5689ac27a0ecSDave Kleikamp return NULL; 5690ac27a0ecSDave Kleikamp } 5691ac27a0ecSDave Kleikamp journal->j_private = sb; 5692617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5693ac27a0ecSDave Kleikamp return journal; 5694ac27a0ecSDave Kleikamp } 5695ac27a0ecSDave Kleikamp 5696617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5697ac27a0ecSDave Kleikamp dev_t j_dev) 5698ac27a0ecSDave Kleikamp { 5699ac27a0ecSDave Kleikamp struct buffer_head *bh; 5700ac27a0ecSDave Kleikamp journal_t *journal; 5701617ba13bSMingming Cao ext4_fsblk_t start; 5702617ba13bSMingming Cao ext4_fsblk_t len; 5703ac27a0ecSDave Kleikamp int hblock, blocksize; 5704617ba13bSMingming Cao ext4_fsblk_t sb_block; 5705ac27a0ecSDave Kleikamp unsigned long offset; 5706617ba13bSMingming Cao struct ext4_super_block *es; 5707ac27a0ecSDave Kleikamp struct block_device *bdev; 5708ac27a0ecSDave Kleikamp 570911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 571011215630SJan Kara return NULL; 57110390131bSFrank Mayhar 5712b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5713ac27a0ecSDave Kleikamp if (bdev == NULL) 5714ac27a0ecSDave Kleikamp return NULL; 5715ac27a0ecSDave Kleikamp 5716ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5717e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5718ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5720b31e1552SEric Sandeen "blocksize too small for journal device"); 5721ac27a0ecSDave Kleikamp goto out_bdev; 5722ac27a0ecSDave Kleikamp } 5723ac27a0ecSDave Kleikamp 5724617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5725617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5726ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5727ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5728b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5729b31e1552SEric Sandeen "external journal"); 5730ac27a0ecSDave Kleikamp goto out_bdev; 5731ac27a0ecSDave Kleikamp } 5732ac27a0ecSDave Kleikamp 57332716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5734617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5735ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5736617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5737b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5738b31e1552SEric Sandeen "bad superblock"); 5739ac27a0ecSDave Kleikamp brelse(bh); 5740ac27a0ecSDave Kleikamp goto out_bdev; 5741ac27a0ecSDave Kleikamp } 5742ac27a0ecSDave Kleikamp 5743df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5744df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5745df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5746df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5747df4763beSDarrick J. Wong "corrupt superblock"); 5748df4763beSDarrick J. Wong brelse(bh); 5749df4763beSDarrick J. Wong goto out_bdev; 5750df4763beSDarrick J. Wong } 5751df4763beSDarrick J. Wong 5752617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5753b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5754ac27a0ecSDave Kleikamp brelse(bh); 5755ac27a0ecSDave Kleikamp goto out_bdev; 5756ac27a0ecSDave Kleikamp } 5757ac27a0ecSDave Kleikamp 5758bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5759ac27a0ecSDave Kleikamp start = sb_block + 1; 5760ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5761ac27a0ecSDave Kleikamp 5762dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5763ac27a0ecSDave Kleikamp start, len, blocksize); 5764ac27a0ecSDave Kleikamp if (!journal) { 5765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5766ac27a0ecSDave Kleikamp goto out_bdev; 5767ac27a0ecSDave Kleikamp } 5768ac27a0ecSDave Kleikamp journal->j_private = sb; 57692d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5770b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5771ac27a0ecSDave Kleikamp goto out_journal; 5772ac27a0ecSDave Kleikamp } 5773ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5774b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5775b31e1552SEric Sandeen "user (unsupported) - %d", 5776ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5777ac27a0ecSDave Kleikamp goto out_journal; 5778ac27a0ecSDave Kleikamp } 5779ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5780617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5781ac27a0ecSDave Kleikamp return journal; 57820b8e58a1SAndreas Dilger 5783ac27a0ecSDave Kleikamp out_journal: 5784dab291afSMingming Cao jbd2_journal_destroy(journal); 5785ac27a0ecSDave Kleikamp out_bdev: 5786617ba13bSMingming Cao ext4_blkdev_put(bdev); 5787ac27a0ecSDave Kleikamp return NULL; 5788ac27a0ecSDave Kleikamp } 5789ac27a0ecSDave Kleikamp 5790617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5791617ba13bSMingming Cao struct ext4_super_block *es, 5792ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5793ac27a0ecSDave Kleikamp { 5794ac27a0ecSDave Kleikamp journal_t *journal; 5795ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5796ac27a0ecSDave Kleikamp dev_t journal_dev; 5797ac27a0ecSDave Kleikamp int err = 0; 5798ac27a0ecSDave Kleikamp int really_read_only; 5799273108faSLukas Czerner int journal_dev_ro; 5800ac27a0ecSDave Kleikamp 580111215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 580211215630SJan Kara return -EFSCORRUPTED; 58030390131bSFrank Mayhar 5804ac27a0ecSDave Kleikamp if (journal_devnum && 5805ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5806b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5807b31e1552SEric Sandeen "numbers have changed"); 5808ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5809ac27a0ecSDave Kleikamp } else 5810ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5811ac27a0ecSDave Kleikamp 5812273108faSLukas Czerner if (journal_inum && journal_dev) { 5813273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5814273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5815273108faSLukas Czerner return -EINVAL; 5816273108faSLukas Czerner } 5817273108faSLukas Czerner 5818273108faSLukas Czerner if (journal_inum) { 5819273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5820273108faSLukas Czerner if (!journal) 5821273108faSLukas Czerner return -EINVAL; 5822273108faSLukas Czerner } else { 5823273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5824273108faSLukas Czerner if (!journal) 5825273108faSLukas Czerner return -EINVAL; 5826273108faSLukas Czerner } 5827273108faSLukas Czerner 5828273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5829273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5830273108faSLukas Czerner 5831273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5832273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5833273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5834273108faSLukas Czerner err = -EROFS; 5835273108faSLukas Czerner goto err_out; 5836273108faSLukas Czerner } 5837ac27a0ecSDave Kleikamp 5838ac27a0ecSDave Kleikamp /* 5839ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5840ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5841ac27a0ecSDave Kleikamp * can get read-write access to the device. 5842ac27a0ecSDave Kleikamp */ 5843e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5844bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5845b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5846b31e1552SEric Sandeen "required on readonly filesystem"); 5847ac27a0ecSDave Kleikamp if (really_read_only) { 5848b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5849d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5850d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5851273108faSLukas Czerner err = -EROFS; 5852273108faSLukas Czerner goto err_out; 5853ac27a0ecSDave Kleikamp } 5854b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5855b31e1552SEric Sandeen "be enabled during recovery"); 5856ac27a0ecSDave Kleikamp } 5857ac27a0ecSDave Kleikamp } 5858ac27a0ecSDave Kleikamp 585990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5860b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 58614776004fSTheodore Ts'o 5862e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5863dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 58641c13d5c0STheodore Ts'o if (!err) { 58651c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 58661c13d5c0STheodore Ts'o if (save) 58671c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 58681c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5869dab291afSMingming Cao err = jbd2_journal_load(journal); 58701c13d5c0STheodore Ts'o if (save) 58711c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 58721c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 58731c13d5c0STheodore Ts'o kfree(save); 58741c13d5c0STheodore Ts'o } 5875ac27a0ecSDave Kleikamp 5876ac27a0ecSDave Kleikamp if (err) { 5877b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5878273108faSLukas Czerner goto err_out; 5879ac27a0ecSDave Kleikamp } 5880ac27a0ecSDave Kleikamp 5881617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 588211215630SJan Kara err = ext4_clear_journal_err(sb, es); 588311215630SJan Kara if (err) { 588411215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 588511215630SJan Kara jbd2_journal_destroy(journal); 588611215630SJan Kara return err; 588711215630SJan Kara } 5888ac27a0ecSDave Kleikamp 5889c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5890ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5891ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5892ac27a0ecSDave Kleikamp 5893ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 58944392fbc4SJan Kara ext4_commit_super(sb); 5895ac27a0ecSDave Kleikamp } 5896ac27a0ecSDave Kleikamp 5897ac27a0ecSDave Kleikamp return 0; 5898273108faSLukas Czerner 5899273108faSLukas Czerner err_out: 5900273108faSLukas Czerner jbd2_journal_destroy(journal); 5901273108faSLukas Czerner return err; 5902ac27a0ecSDave Kleikamp } 5903ac27a0ecSDave Kleikamp 59042d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 59052d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5906ac27a0ecSDave Kleikamp { 5907c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5908e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5909e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5910ac27a0ecSDave Kleikamp 591105c2c00fSJan Kara lock_buffer(sbh); 5912a17712c8SJon Derrick /* 591371290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 591471290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 591571290b36STheodore Ts'o * write time when we are mounting the root file system 591671290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 591771290b36STheodore Ts'o * for people who are east of GMT and who make their clock 591871290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 591971290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 592071290b36STheodore Ts'o * to complain and force a full file system check. 592171290b36STheodore Ts'o */ 59221751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 59236a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5924afc32f7eSTheodore Ts'o es->s_kbytes_written = 5925e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 59268446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5927e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5928e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 592957042651STheodore Ts'o ext4_free_blocks_count_set(es, 5930e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5931e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5932e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 59337f93cff9STheodore Ts'o es->s_free_inodes_count = 59347f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5935e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5936c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5937c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5938c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5939c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5940c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5941c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5942c92dc856SJan Kara &es->s_first_error_time_hi, 5943c92dc856SJan Kara sbi->s_first_error_time); 5944c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5945c92dc856SJan Kara sizeof(es->s_first_error_func)); 5946c92dc856SJan Kara es->s_first_error_line = 5947c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5948c92dc856SJan Kara es->s_first_error_ino = 5949c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5950c92dc856SJan Kara es->s_first_error_block = 5951c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5952c92dc856SJan Kara es->s_first_error_errcode = 5953c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5954c92dc856SJan Kara } 5955c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5956c92dc856SJan Kara &es->s_last_error_time_hi, 5957c92dc856SJan Kara sbi->s_last_error_time); 5958c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5959c92dc856SJan Kara sizeof(es->s_last_error_func)); 5960c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5961c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5962c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5963c92dc856SJan Kara es->s_last_error_errcode = 5964c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5965c92dc856SJan Kara /* 5966c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5967c92dc856SJan Kara * started already 5968c92dc856SJan Kara */ 5969c92dc856SJan Kara if (!es->s_error_count) 5970c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5971c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5972c92dc856SJan Kara sbi->s_add_error_count = 0; 5973c92dc856SJan Kara } 5974c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5975c92dc856SJan Kara 597606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 59772d01ddc8SJan Kara unlock_buffer(sbh); 59782d01ddc8SJan Kara } 59792d01ddc8SJan Kara 59802d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 59812d01ddc8SJan Kara { 59822d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 59832d01ddc8SJan Kara int error = 0; 59842d01ddc8SJan Kara 5985f88f1466SFengnan Chang if (!sbh) 5986f88f1466SFengnan Chang return -EINVAL; 5987f88f1466SFengnan Chang if (block_device_ejected(sb)) 5988f88f1466SFengnan Chang return -ENODEV; 59892d01ddc8SJan Kara 59902d01ddc8SJan Kara ext4_update_super(sb); 59912d01ddc8SJan Kara 5992e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 59934743f839SPranay Kr. Srivastava /* 59944743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 59954743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 59964743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 59974743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 59984743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 59994743f839SPranay Kr. Srivastava * write and hope for the best. 60004743f839SPranay Kr. Srivastava */ 60014743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 60024743f839SPranay Kr. Srivastava "superblock detected"); 60034743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 60044743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 60054743f839SPranay Kr. Srivastava } 60062d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 6007ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 6008564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 600900473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 6010c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6011b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6012b31e1552SEric Sandeen "superblock"); 6013914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6014914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 6015914258bfSTheodore Ts'o } 6016c4be0c1dSTakashi Sato return error; 6017ac27a0ecSDave Kleikamp } 6018ac27a0ecSDave Kleikamp 6019ac27a0ecSDave Kleikamp /* 6020ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6021ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6022ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6023ac27a0ecSDave Kleikamp */ 602411215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6025617ba13bSMingming Cao struct ext4_super_block *es) 6026ac27a0ecSDave Kleikamp { 602711215630SJan Kara int err; 6028617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6029ac27a0ecSDave Kleikamp 6030e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 603111215630SJan Kara if (journal != NULL) { 603211215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 603311215630SJan Kara "mounted!"); 603411215630SJan Kara return -EFSCORRUPTED; 603511215630SJan Kara } 603611215630SJan Kara return 0; 60370390131bSFrank Mayhar } 6038dab291afSMingming Cao jbd2_journal_lock_updates(journal); 603901d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 604011215630SJan Kara if (err < 0) 60417ffe1ea8SHidehiro Kawai goto out; 60427ffe1ea8SHidehiro Kawai 604302f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 604402f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 604502f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 604602f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 604702f310fcSJan Kara err = -EFSCORRUPTED; 604802f310fcSJan Kara goto out; 604902f310fcSJan Kara } 6050e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 605102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 60524392fbc4SJan Kara ext4_commit_super(sb); 6053ac27a0ecSDave Kleikamp } 60547ffe1ea8SHidehiro Kawai out: 6055dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 605611215630SJan Kara return err; 6057ac27a0ecSDave Kleikamp } 6058ac27a0ecSDave Kleikamp 6059ac27a0ecSDave Kleikamp /* 6060ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6061ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6062ac27a0ecSDave Kleikamp * main filesystem now. 6063ac27a0ecSDave Kleikamp */ 606411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6065617ba13bSMingming Cao struct ext4_super_block *es) 6066ac27a0ecSDave Kleikamp { 6067ac27a0ecSDave Kleikamp journal_t *journal; 6068ac27a0ecSDave Kleikamp int j_errno; 6069ac27a0ecSDave Kleikamp const char *errstr; 6070ac27a0ecSDave Kleikamp 607111215630SJan Kara if (!ext4_has_feature_journal(sb)) { 607211215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 607311215630SJan Kara return -EFSCORRUPTED; 607411215630SJan Kara } 60750390131bSFrank Mayhar 6076617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6077ac27a0ecSDave Kleikamp 6078ac27a0ecSDave Kleikamp /* 6079ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6080617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6081ac27a0ecSDave Kleikamp */ 6082ac27a0ecSDave Kleikamp 6083dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6084ac27a0ecSDave Kleikamp if (j_errno) { 6085ac27a0ecSDave Kleikamp char nbuf[16]; 6086ac27a0ecSDave Kleikamp 6087617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 608812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6089ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 609012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6091ac27a0ecSDave Kleikamp 6092617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6093617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 60944392fbc4SJan Kara ext4_commit_super(sb); 6095ac27a0ecSDave Kleikamp 6096dab291afSMingming Cao jbd2_journal_clear_err(journal); 6097d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6098ac27a0ecSDave Kleikamp } 609911215630SJan Kara return 0; 6100ac27a0ecSDave Kleikamp } 6101ac27a0ecSDave Kleikamp 6102ac27a0ecSDave Kleikamp /* 6103ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6104ac27a0ecSDave Kleikamp * and wait on the commit. 6105ac27a0ecSDave Kleikamp */ 6106617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6107ac27a0ecSDave Kleikamp { 6108ac27a0ecSDave Kleikamp journal_t *journal; 6109ac27a0ecSDave Kleikamp 6110bc98a42cSDavid Howells if (sb_rdonly(sb)) 6111ac27a0ecSDave Kleikamp return 0; 6112ac27a0ecSDave Kleikamp 6113617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6114b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6115ac27a0ecSDave Kleikamp } 6116ac27a0ecSDave Kleikamp 6117617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6118ac27a0ecSDave Kleikamp { 611914ce0cb4STheodore Ts'o int ret = 0; 61209eddacf9SJan Kara tid_t target; 612106a407f1SDmitry Monakhov bool needs_barrier = false; 61228d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6123ac27a0ecSDave Kleikamp 612449598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 61250db1ff22STheodore Ts'o return 0; 61260db1ff22STheodore Ts'o 61279bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 61282e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6129a1177825SJan Kara /* 6130a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6131a1177825SJan Kara * no dirty dquots 6132a1177825SJan Kara */ 6133a1177825SJan Kara dquot_writeback_dquots(sb, -1); 613406a407f1SDmitry Monakhov /* 613506a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 613606a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 613706a407f1SDmitry Monakhov * transaction_commit will do it for us. 613806a407f1SDmitry Monakhov */ 6139bda32530STheodore Ts'o if (sbi->s_journal) { 614006a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 614106a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 614206a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 614306a407f1SDmitry Monakhov needs_barrier = true; 614406a407f1SDmitry Monakhov 61458d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6146ac27a0ecSDave Kleikamp if (wait) 6147bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6148bda32530STheodore Ts'o target); 61490390131bSFrank Mayhar } 6150bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6151bda32530STheodore Ts'o needs_barrier = true; 615206a407f1SDmitry Monakhov if (needs_barrier) { 615306a407f1SDmitry Monakhov int err; 6154c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 615506a407f1SDmitry Monakhov if (!ret) 615606a407f1SDmitry Monakhov ret = err; 615706a407f1SDmitry Monakhov } 615806a407f1SDmitry Monakhov 615906a407f1SDmitry Monakhov return ret; 616006a407f1SDmitry Monakhov } 616106a407f1SDmitry Monakhov 6162ac27a0ecSDave Kleikamp /* 6163ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6164ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6165be4f27d3SYongqiang Yang * 6166be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 61678e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 61688e8ad8a5SJan Kara * modifications. 6169ac27a0ecSDave Kleikamp */ 6170c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6171ac27a0ecSDave Kleikamp { 6172c4be0c1dSTakashi Sato int error = 0; 6173c4be0c1dSTakashi Sato journal_t *journal; 6174ac27a0ecSDave Kleikamp 6175bc98a42cSDavid Howells if (sb_rdonly(sb)) 61769ca92389STheodore Ts'o return 0; 61779ca92389STheodore Ts'o 6178c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6179ac27a0ecSDave Kleikamp 6180bb044576STheodore Ts'o if (journal) { 6181ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6182dab291afSMingming Cao jbd2_journal_lock_updates(journal); 61837ffe1ea8SHidehiro Kawai 61847ffe1ea8SHidehiro Kawai /* 6185bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6186bb044576STheodore Ts'o * flush the journal. 61877ffe1ea8SHidehiro Kawai */ 618801d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 61896b0310fbSEric Sandeen if (error < 0) 61906b0310fbSEric Sandeen goto out; 6191ac27a0ecSDave Kleikamp 6192ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6193e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 619402f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 619502f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6196c642dc9eSEric Sandeen } 6197c642dc9eSEric Sandeen 61984392fbc4SJan Kara error = ext4_commit_super(sb); 61996b0310fbSEric Sandeen out: 6200bb044576STheodore Ts'o if (journal) 62018e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6202bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 62036b0310fbSEric Sandeen return error; 6204ac27a0ecSDave Kleikamp } 6205ac27a0ecSDave Kleikamp 6206ac27a0ecSDave Kleikamp /* 6207ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6208ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6209ac27a0ecSDave Kleikamp */ 6210c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6211ac27a0ecSDave Kleikamp { 6212bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 62139ca92389STheodore Ts'o return 0; 62149ca92389STheodore Ts'o 6215c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 62169ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6217e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 621802f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 621902f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6220c642dc9eSEric Sandeen } 6221c642dc9eSEric Sandeen 62224392fbc4SJan Kara ext4_commit_super(sb); 6223c4be0c1dSTakashi Sato return 0; 6224ac27a0ecSDave Kleikamp } 6225ac27a0ecSDave Kleikamp 6226673c6100STheodore Ts'o /* 6227673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6228673c6100STheodore Ts'o */ 6229673c6100STheodore Ts'o struct ext4_mount_options { 6230673c6100STheodore Ts'o unsigned long s_mount_opt; 6231a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 623208cefc7aSEric W. Biederman kuid_t s_resuid; 623308cefc7aSEric W. Biederman kgid_t s_resgid; 6234673c6100STheodore Ts'o unsigned long s_commit_interval; 6235673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6236673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6237673c6100STheodore Ts'o int s_jquota_fmt; 6238a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6239673c6100STheodore Ts'o #endif 6240673c6100STheodore Ts'o }; 6241673c6100STheodore Ts'o 6242960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6243ac27a0ecSDave Kleikamp { 62447edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6245617ba13bSMingming Cao struct ext4_super_block *es; 6246617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6247960e0ab6SLukas Czerner unsigned long old_sb_flags; 6248617ba13bSMingming Cao struct ext4_mount_options old_opts; 62498a266467STheodore Ts'o ext4_group_t g; 6250c5e06d10SJohann Lombardi int err = 0; 6251ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 62523bbef91bSAustin Kim int enable_quota = 0; 625303dafb5fSChen Gang int i, j; 625433458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6255ac27a0ecSDave Kleikamp #endif 6256b237e304SHarshad Shirwadkar 62577edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 625821ac738eSChengguang Xu 6259ac27a0ecSDave Kleikamp /* Store the original options */ 6260ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6261ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6262a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6263ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6264ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6265ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 626630773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 626730773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6268ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6269ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6270a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 627103dafb5fSChen Gang if (sbi->s_qf_names[i]) { 627233458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 627333458eabSTheodore Ts'o 627433458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 627503dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 627603dafb5fSChen Gang for (j = 0; j < i; j++) 627703dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 627803dafb5fSChen Gang return -ENOMEM; 627903dafb5fSChen Gang } 628003dafb5fSChen Gang } else 628103dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6282ac27a0ecSDave Kleikamp #endif 6283b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 62847edfd85bSLukas Czerner ctx->journal_ioprio = 6285b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6286ac27a0ecSDave Kleikamp 62877edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6288ac27a0ecSDave Kleikamp 62896b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 62906b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 62916b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 62922d5b86e0SEric Sandeen "during remount not supported; ignoring"); 62932d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6294c6d3d56dSDarrick J. Wong } 6295c6d3d56dSDarrick J. Wong 62966ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 62976ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 62986ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62996ae6514bSPiotr Sarna "both data=journal and delalloc"); 63006ae6514bSPiotr Sarna err = -EINVAL; 63016ae6514bSPiotr Sarna goto restore_opts; 63026ae6514bSPiotr Sarna } 63036ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 63046ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63056ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 63066ae6514bSPiotr Sarna err = -EINVAL; 63076ae6514bSPiotr Sarna goto restore_opts; 63086ae6514bSPiotr Sarna } 6309ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6310ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6311ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6312ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6313ab04df78SJan Kara err = -EINVAL; 6314ab04df78SJan Kara goto restore_opts; 6315ab04df78SJan Kara } 6316923ae0ffSRoss Zwisler } 6317923ae0ffSRoss Zwisler 6318cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6319cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6320cdb7ee4cSTahsin Erdogan err = -EINVAL; 6321cdb7ee4cSTahsin Erdogan goto restore_opts; 6322cdb7ee4cSTahsin Erdogan } 6323cdb7ee4cSTahsin Erdogan 63249b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6325124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6326ac27a0ecSDave Kleikamp 63271751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 63281751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6329ac27a0ecSDave Kleikamp 6330ac27a0ecSDave Kleikamp es = sbi->s_es; 6331ac27a0ecSDave Kleikamp 6332b3881f74STheodore Ts'o if (sbi->s_journal) { 6333617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 63347edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6335b3881f74STheodore Ts'o } 6336ac27a0ecSDave Kleikamp 6337c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6338c92dc856SJan Kara flush_work(&sbi->s_error_work); 6339c92dc856SJan Kara 6340960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 63419b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6342ac27a0ecSDave Kleikamp err = -EROFS; 6343ac27a0ecSDave Kleikamp goto restore_opts; 6344ac27a0ecSDave Kleikamp } 6345ac27a0ecSDave Kleikamp 6346960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 634738c03b34STheodore Ts'o err = sync_filesystem(sb); 634838c03b34STheodore Ts'o if (err < 0) 634938c03b34STheodore Ts'o goto restore_opts; 63500f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 63510f0dd62fSChristoph Hellwig if (err < 0) 6352c79d967dSChristoph Hellwig goto restore_opts; 6353c79d967dSChristoph Hellwig 6354ac27a0ecSDave Kleikamp /* 6355ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6356ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6357ac27a0ecSDave Kleikamp */ 63581751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6359ac27a0ecSDave Kleikamp 6360ac27a0ecSDave Kleikamp /* 6361ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6362ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6363ac27a0ecSDave Kleikamp * mark the partition as valid again. 6364ac27a0ecSDave Kleikamp */ 6365617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6366617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6367ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6368ac27a0ecSDave Kleikamp 636911215630SJan Kara if (sbi->s_journal) { 637011215630SJan Kara /* 637111215630SJan Kara * We let remount-ro finish even if marking fs 637211215630SJan Kara * as clean failed... 637311215630SJan Kara */ 6374617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 637511215630SJan Kara } 6376ac27a0ecSDave Kleikamp } else { 6377a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6378e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 63792cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6380ac27a0ecSDave Kleikamp err = -EROFS; 6381ac27a0ecSDave Kleikamp goto restore_opts; 6382ac27a0ecSDave Kleikamp } 6383ead6596bSEric Sandeen /* 63848a266467STheodore Ts'o * Make sure the group descriptor checksums 63850b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 63868a266467STheodore Ts'o */ 63878a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 63888a266467STheodore Ts'o struct ext4_group_desc *gdp = 63898a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 63908a266467STheodore Ts'o 6391feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6392b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6393b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6394e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 63958a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 63966a797d27SDarrick J. Wong err = -EFSBADCRC; 63978a266467STheodore Ts'o goto restore_opts; 63988a266467STheodore Ts'o } 63998a266467STheodore Ts'o } 64008a266467STheodore Ts'o 64018a266467STheodore Ts'o /* 6402ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6403ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6404ead6596bSEric Sandeen * require a full umount/remount for now. 6405ead6596bSEric Sandeen */ 640602f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6407b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6408ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6409ead6596bSEric Sandeen "orphan inode list. Please " 6410b31e1552SEric Sandeen "umount/remount instead"); 6411ead6596bSEric Sandeen err = -EINVAL; 6412ead6596bSEric Sandeen goto restore_opts; 6413ead6596bSEric Sandeen } 6414ead6596bSEric Sandeen 6415ac27a0ecSDave Kleikamp /* 6416ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6417ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6418ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6419ac27a0ecSDave Kleikamp * the partition.) 6420ac27a0ecSDave Kleikamp */ 642111215630SJan Kara if (sbi->s_journal) { 642211215630SJan Kara err = ext4_clear_journal_err(sb, es); 642311215630SJan Kara if (err) 642411215630SJan Kara goto restore_opts; 642511215630SJan Kara } 6426ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6427c89128a0SJaegeuk Kim 6428c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6429c89128a0SJaegeuk Kim if (err) 6430c89128a0SJaegeuk Kim goto restore_opts; 6431c89128a0SJaegeuk Kim 64321751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6433e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6434c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6435c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6436c5e06d10SJohann Lombardi err = -EROFS; 6437c5e06d10SJohann Lombardi goto restore_opts; 6438c5e06d10SJohann Lombardi } 64393bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6440c79d967dSChristoph Hellwig enable_quota = 1; 64413bbef91bSAustin Kim #endif 6442ac27a0ecSDave Kleikamp } 6443ac27a0ecSDave Kleikamp } 6444bfff6873SLukas Czerner 6445bfff6873SLukas Czerner /* 6446bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6447bfff6873SLukas Czerner * current settings 6448bfff6873SLukas Czerner */ 6449bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6450bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6451bfff6873SLukas Czerner else { 6452bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6453bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6454bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6455bfff6873SLukas Czerner } 6456bfff6873SLukas Czerner 64570f5bde1dSJan Kara /* 64580f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 64590f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 64600f5bde1dSJan Kara * succeed. 64610f5bde1dSJan Kara */ 6462dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6463d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6464d176b1f6SJan Kara if (err) 6465d176b1f6SJan Kara goto restore_opts; 64660f5bde1dSJan Kara } 6467d176b1f6SJan Kara 6468c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64694392fbc4SJan Kara err = ext4_commit_super(sb); 6470c89128a0SJaegeuk Kim if (err) 6471c89128a0SJaegeuk Kim goto restore_opts; 6472c89128a0SJaegeuk Kim } 64730390131bSFrank Mayhar 6474ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6475ac27a0ecSDave Kleikamp /* Release old quota file names */ 6476a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6477ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 64787c319d32SAditya Kali if (enable_quota) { 64797c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 64800f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6481e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 64827c319d32SAditya Kali err = ext4_enable_quotas(sb); 648307724f98STheodore Ts'o if (err) 64847c319d32SAditya Kali goto restore_opts; 64857c319d32SAditya Kali } 64867c319d32SAditya Kali } 64877c319d32SAditya Kali #endif 6488dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64890f5bde1dSJan Kara ext4_release_system_zone(sb); 6490d4c402d9SCurt Wohlgemuth 649161bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 649261bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 649361bb4a1cSTheodore Ts'o 6494ac27a0ecSDave Kleikamp return 0; 64950b8e58a1SAndreas Dilger 6496ac27a0ecSDave Kleikamp restore_opts: 6497ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6498ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6499a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6500ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6501ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6502ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 650330773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 650430773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6505dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65060f5bde1dSJan Kara ext4_release_system_zone(sb); 6507ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6508ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6509a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 651033458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 651133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6512ac27a0ecSDave Kleikamp } 651333458eabSTheodore Ts'o synchronize_rcu(); 651433458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 651533458eabSTheodore Ts'o kfree(to_free[i]); 6516ac27a0ecSDave Kleikamp #endif 651761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 651861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6519ac27a0ecSDave Kleikamp return err; 6520ac27a0ecSDave Kleikamp } 6521ac27a0ecSDave Kleikamp 6522cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 65237edfd85bSLukas Czerner { 6524cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 65257edfd85bSLukas Czerner int ret; 65267edfd85bSLukas Czerner 6527cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 65287edfd85bSLukas Czerner 6529cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 65307edfd85bSLukas Czerner if (ret < 0) 65317edfd85bSLukas Czerner return ret; 6532cebe85d5SLukas Czerner 6533960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6534cebe85d5SLukas Czerner if (ret < 0) 6535cebe85d5SLukas Czerner return ret; 6536cebe85d5SLukas Czerner 6537cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6538cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6539cebe85d5SLukas Czerner 6540cebe85d5SLukas Czerner return 0; 65417edfd85bSLukas Czerner } 65427edfd85bSLukas Czerner 6543689c958cSLi Xi #ifdef CONFIG_QUOTA 6544689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6545689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6546689c958cSLi Xi { 6547689c958cSLi Xi struct kqid qid; 6548689c958cSLi Xi struct dquot *dquot; 6549689c958cSLi Xi u64 limit; 6550689c958cSLi Xi u64 curblock; 6551689c958cSLi Xi 6552689c958cSLi Xi qid = make_kqid_projid(projid); 6553689c958cSLi Xi dquot = dqget(sb, qid); 6554689c958cSLi Xi if (IS_ERR(dquot)) 6555689c958cSLi Xi return PTR_ERR(dquot); 65567b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6557689c958cSLi Xi 6558a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6559a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 656057c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 656157c32ea4SChengguang Xu 6562689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6563f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6564f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6565689c958cSLi Xi buf->f_blocks = limit; 6566689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6567689c958cSLi Xi (buf->f_blocks > curblock) ? 6568689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6569689c958cSLi Xi } 6570689c958cSLi Xi 6571a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6572a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6573689c958cSLi Xi if (limit && buf->f_files > limit) { 6574689c958cSLi Xi buf->f_files = limit; 6575689c958cSLi Xi buf->f_ffree = 6576689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6577689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6578689c958cSLi Xi } 6579689c958cSLi Xi 65807b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6581689c958cSLi Xi dqput(dquot); 6582689c958cSLi Xi return 0; 6583689c958cSLi Xi } 6584689c958cSLi Xi #endif 6585689c958cSLi Xi 6586617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6587ac27a0ecSDave Kleikamp { 6588ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6589617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6590617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 659127dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6592d02a9391SKazuya Mio s64 bfree; 659327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6594ac27a0ecSDave Kleikamp 6595952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6596952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6597ac27a0ecSDave Kleikamp 6598617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6599ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6600b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 660157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 660257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6603d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 660457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 660527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 660627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 660727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6608ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6609ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 661052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6611617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 66129591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 66130b8e58a1SAndreas Dilger 6614689c958cSLi Xi #ifdef CONFIG_QUOTA 6615689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6616689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6617689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6618689c958cSLi Xi #endif 6619ac27a0ecSDave Kleikamp return 0; 6620ac27a0ecSDave Kleikamp } 6621ac27a0ecSDave Kleikamp 6622ac27a0ecSDave Kleikamp 6623ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6624ac27a0ecSDave Kleikamp 6625bc8230eeSJan Kara /* 6626bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6627bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6628bc8230eeSJan Kara */ 6629ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6630ac27a0ecSDave Kleikamp { 66314c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6632ac27a0ecSDave Kleikamp } 6633ac27a0ecSDave Kleikamp 6634617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6635ac27a0ecSDave Kleikamp { 6636ac27a0ecSDave Kleikamp int ret, err; 6637ac27a0ecSDave Kleikamp handle_t *handle; 6638ac27a0ecSDave Kleikamp struct inode *inode; 6639ac27a0ecSDave Kleikamp 6640ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 66419924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6642617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6643ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6644ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6645ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6646617ba13bSMingming Cao err = ext4_journal_stop(handle); 6647ac27a0ecSDave Kleikamp if (!ret) 6648ac27a0ecSDave Kleikamp ret = err; 6649ac27a0ecSDave Kleikamp return ret; 6650ac27a0ecSDave Kleikamp } 6651ac27a0ecSDave Kleikamp 6652617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6653ac27a0ecSDave Kleikamp { 6654ac27a0ecSDave Kleikamp int ret, err; 6655ac27a0ecSDave Kleikamp handle_t *handle; 6656ac27a0ecSDave Kleikamp 66579924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6658617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6659ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6660ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6661ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6662617ba13bSMingming Cao err = ext4_journal_stop(handle); 6663ac27a0ecSDave Kleikamp if (!ret) 6664ac27a0ecSDave Kleikamp ret = err; 6665ac27a0ecSDave Kleikamp return ret; 6666ac27a0ecSDave Kleikamp } 6667ac27a0ecSDave Kleikamp 6668617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6669ac27a0ecSDave Kleikamp { 6670ac27a0ecSDave Kleikamp int ret, err; 6671ac27a0ecSDave Kleikamp handle_t *handle; 6672ac27a0ecSDave Kleikamp 66739924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6674617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 66759c3013e9SJan Kara if (IS_ERR(handle)) { 66769c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 66779c3013e9SJan Kara dquot_release(dquot); 6678ac27a0ecSDave Kleikamp return PTR_ERR(handle); 66799c3013e9SJan Kara } 6680ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6681617ba13bSMingming Cao err = ext4_journal_stop(handle); 6682ac27a0ecSDave Kleikamp if (!ret) 6683ac27a0ecSDave Kleikamp ret = err; 6684ac27a0ecSDave Kleikamp return ret; 6685ac27a0ecSDave Kleikamp } 6686ac27a0ecSDave Kleikamp 6687617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6688ac27a0ecSDave Kleikamp { 6689262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6690262b4662SJan Kara 6691f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6692ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6693617ba13bSMingming Cao return ext4_write_dquot(dquot); 6694ac27a0ecSDave Kleikamp } else { 6695ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6696ac27a0ecSDave Kleikamp } 6697ac27a0ecSDave Kleikamp } 6698ac27a0ecSDave Kleikamp 6699617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6700ac27a0ecSDave Kleikamp { 6701ac27a0ecSDave Kleikamp int ret, err; 6702ac27a0ecSDave Kleikamp handle_t *handle; 6703ac27a0ecSDave Kleikamp 6704ac27a0ecSDave Kleikamp /* Data block + inode block */ 67052b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6706ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6707ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6708ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6709617ba13bSMingming Cao err = ext4_journal_stop(handle); 6710ac27a0ecSDave Kleikamp if (!ret) 6711ac27a0ecSDave Kleikamp ret = err; 6712ac27a0ecSDave Kleikamp return ret; 6713ac27a0ecSDave Kleikamp } 6714ac27a0ecSDave Kleikamp 6715daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6716daf647d2STheodore Ts'o { 6717daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6718daf647d2STheodore Ts'o 6719daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6720daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6721daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6722daf647d2STheodore Ts'o * because the name of the lock is set using the 6723daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6724daf647d2STheodore Ts'o */ 6725daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6726daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6727daf647d2STheodore Ts'o } 6728daf647d2STheodore Ts'o 6729ac27a0ecSDave Kleikamp /* 6730ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6731ac27a0ecSDave Kleikamp */ 6732617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 67338c54ca9cSAl Viro const struct path *path) 6734ac27a0ecSDave Kleikamp { 6735ac27a0ecSDave Kleikamp int err; 6736ac27a0ecSDave Kleikamp 6737ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6738ac27a0ecSDave Kleikamp return -EINVAL; 67390623543bSJan Kara 6740ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6741d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6742ac27a0ecSDave Kleikamp return -EXDEV; 6743e0770e91SJan Kara 6744e0770e91SJan Kara /* Quota already enabled for this file? */ 6745e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6746e0770e91SJan Kara return -EBUSY; 6747e0770e91SJan Kara 67480623543bSJan Kara /* Journaling quota? */ 67490623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 67502b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6751f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6752b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6753b31e1552SEric Sandeen "Quota file not on filesystem root. " 6754b31e1552SEric Sandeen "Journaled quota will not work"); 675591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 675691389240SJan Kara } else { 675791389240SJan Kara /* 675891389240SJan Kara * Clear the flag just in case mount options changed since 675991389240SJan Kara * last time. 676091389240SJan Kara */ 676191389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 67620623543bSJan Kara } 67630623543bSJan Kara 67640623543bSJan Kara /* 67650623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 67660623543bSJan Kara * all updates to the file when we bypass pagecache... 67670623543bSJan Kara */ 67680390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67692b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 67700623543bSJan Kara /* 67710623543bSJan Kara * We don't need to lock updates but journal_flush() could 67720623543bSJan Kara * otherwise be livelocked... 67730623543bSJan Kara */ 67740623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 677501d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 67760623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6777f00c9e44SJan Kara if (err) 67787ffe1ea8SHidehiro Kawai return err; 67797ffe1ea8SHidehiro Kawai } 6780957153fcSJan Kara 6781daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6782daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 678315fc69bbSJan Kara if (!err) { 6784957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6785957153fcSJan Kara handle_t *handle; 6786957153fcSJan Kara 678761a92987SJan Kara /* 678861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 678961a92987SJan Kara * files. If this fails, we return success anyway since quotas 679061a92987SJan Kara * are already enabled and this is not a hard failure. 679161a92987SJan Kara */ 6792957153fcSJan Kara inode_lock(inode); 6793957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6794957153fcSJan Kara if (IS_ERR(handle)) 6795957153fcSJan Kara goto unlock_inode; 6796957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6797957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6798957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 67994209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6800957153fcSJan Kara ext4_journal_stop(handle); 6801957153fcSJan Kara unlock_inode: 6802957153fcSJan Kara inode_unlock(inode); 680315fc69bbSJan Kara if (err) 680415fc69bbSJan Kara dquot_quota_off(sb, type); 6805957153fcSJan Kara } 680615fc69bbSJan Kara if (err) 680715fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 680815fc69bbSJan Kara I_DATA_SEM_NORMAL); 6809daf647d2STheodore Ts'o return err; 6810ac27a0ecSDave Kleikamp } 6811ac27a0ecSDave Kleikamp 68127c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 68137c319d32SAditya Kali unsigned int flags) 68147c319d32SAditya Kali { 68157c319d32SAditya Kali int err; 68167c319d32SAditya Kali struct inode *qf_inode; 6817a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68187c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6819689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6820689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68217c319d32SAditya Kali }; 68227c319d32SAditya Kali 6823e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 68247c319d32SAditya Kali 68257c319d32SAditya Kali if (!qf_inums[type]) 68267c319d32SAditya Kali return -EPERM; 68277c319d32SAditya Kali 68288a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 68297c319d32SAditya Kali if (IS_ERR(qf_inode)) { 68307c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 68317c319d32SAditya Kali return PTR_ERR(qf_inode); 68327c319d32SAditya Kali } 68337c319d32SAditya Kali 6834bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6835bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6836daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 68377212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6838daf647d2STheodore Ts'o if (err) 6839daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 684061157b24SPan Bian iput(qf_inode); 68417c319d32SAditya Kali 68427c319d32SAditya Kali return err; 68437c319d32SAditya Kali } 68447c319d32SAditya Kali 68457c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 684625c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 68477c319d32SAditya Kali { 68487c319d32SAditya Kali int type, err = 0; 6849a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68507c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6851689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6852689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68537c319d32SAditya Kali }; 685449da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 685549da9392SJan Kara test_opt(sb, USRQUOTA), 685649da9392SJan Kara test_opt(sb, GRPQUOTA), 685749da9392SJan Kara test_opt(sb, PRJQUOTA), 685849da9392SJan Kara }; 68597c319d32SAditya Kali 686091389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6861a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 68627c319d32SAditya Kali if (qf_inums[type]) { 68637c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 686449da9392SJan Kara DQUOT_USAGE_ENABLED | 686549da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 68667c319d32SAditya Kali if (err) { 68677c319d32SAditya Kali ext4_warning(sb, 686872ba7450STheodore Ts'o "Failed to enable quota tracking " 686972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 687072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 68714013d47aSJan Kara for (type--; type >= 0; type--) { 68724013d47aSJan Kara struct inode *inode; 68734013d47aSJan Kara 68744013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 68754013d47aSJan Kara if (inode) 68764013d47aSJan Kara inode = igrab(inode); 68777f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 68784013d47aSJan Kara if (inode) { 68794013d47aSJan Kara lockdep_set_quota_inode(inode, 68804013d47aSJan Kara I_DATA_SEM_NORMAL); 68814013d47aSJan Kara iput(inode); 68824013d47aSJan Kara } 68834013d47aSJan Kara } 68847f144fd0SJunichi Uekawa 68857c319d32SAditya Kali return err; 68867c319d32SAditya Kali } 68877c319d32SAditya Kali } 68887c319d32SAditya Kali } 68897c319d32SAditya Kali return 0; 68907c319d32SAditya Kali } 68917c319d32SAditya Kali 6892ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6893ca0e05e4SDmitry Monakhov { 689421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 689521f97697SJan Kara handle_t *handle; 6896957153fcSJan Kara int err; 689721f97697SJan Kara 689887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 689987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 690087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6901ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6902ca0e05e4SDmitry Monakhov 6903957153fcSJan Kara if (!inode || !igrab(inode)) 69040b268590SAmir Goldstein goto out; 69050b268590SAmir Goldstein 6906957153fcSJan Kara err = dquot_quota_off(sb, type); 6907964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6908957153fcSJan Kara goto out_put; 6909957153fcSJan Kara 6910957153fcSJan Kara inode_lock(inode); 691161a92987SJan Kara /* 691261a92987SJan Kara * Update modification times of quota files when userspace can 691361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 691461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 691561a92987SJan Kara */ 69169924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 69174209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 69184209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6919957153fcSJan Kara goto out_unlock; 69204209ae12SHarshad Shirwadkar } 6921957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6922957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6923eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 69244209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 692521f97697SJan Kara ext4_journal_stop(handle); 6926957153fcSJan Kara out_unlock: 6927957153fcSJan Kara inode_unlock(inode); 6928957153fcSJan Kara out_put: 6929964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6930957153fcSJan Kara iput(inode); 6931957153fcSJan Kara return err; 693221f97697SJan Kara out: 6933ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6934ca0e05e4SDmitry Monakhov } 6935ca0e05e4SDmitry Monakhov 6936ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6937ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6938ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6939ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6940617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6941ac27a0ecSDave Kleikamp size_t len, loff_t off) 6942ac27a0ecSDave Kleikamp { 6943ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6944725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6945ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6946ac27a0ecSDave Kleikamp int tocopy; 6947ac27a0ecSDave Kleikamp size_t toread; 6948ac27a0ecSDave Kleikamp struct buffer_head *bh; 6949ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6950ac27a0ecSDave Kleikamp 6951ac27a0ecSDave Kleikamp if (off > i_size) 6952ac27a0ecSDave Kleikamp return 0; 6953ac27a0ecSDave Kleikamp if (off+len > i_size) 6954ac27a0ecSDave Kleikamp len = i_size-off; 6955ac27a0ecSDave Kleikamp toread = len; 6956ac27a0ecSDave Kleikamp while (toread > 0) { 6957ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6958ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 69591c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 69601c215028STheodore Ts'o if (IS_ERR(bh)) 69611c215028STheodore Ts'o return PTR_ERR(bh); 6962ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6963ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6964ac27a0ecSDave Kleikamp else 6965ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6966ac27a0ecSDave Kleikamp brelse(bh); 6967ac27a0ecSDave Kleikamp offset = 0; 6968ac27a0ecSDave Kleikamp toread -= tocopy; 6969ac27a0ecSDave Kleikamp data += tocopy; 6970ac27a0ecSDave Kleikamp blk++; 6971ac27a0ecSDave Kleikamp } 6972ac27a0ecSDave Kleikamp return len; 6973ac27a0ecSDave Kleikamp } 6974ac27a0ecSDave Kleikamp 6975ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6976ac27a0ecSDave Kleikamp * enough credits) */ 6977617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6978ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6979ac27a0ecSDave Kleikamp { 6980ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6981725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 69824209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6983c5e298aeSTheodore Ts'o int retries = 0; 6984ac27a0ecSDave Kleikamp struct buffer_head *bh; 6985ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6986ac27a0ecSDave Kleikamp 6987380a0091SYe Bin if (!handle) { 6988b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6989b31e1552SEric Sandeen " cancelled because transaction is not started", 69909c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 69919c3013e9SJan Kara return -EIO; 69929c3013e9SJan Kara } 699367eeb568SDmitry Monakhov /* 699467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 699567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 699667eeb568SDmitry Monakhov */ 699767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 699867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 699967eeb568SDmitry Monakhov " cancelled because not block aligned", 700067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 700167eeb568SDmitry Monakhov return -EIO; 700267eeb568SDmitry Monakhov } 700367eeb568SDmitry Monakhov 7004c5e298aeSTheodore Ts'o do { 7005c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7006c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7007c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 700845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7009c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 70101c215028STheodore Ts'o if (IS_ERR(bh)) 70111c215028STheodore Ts'o return PTR_ERR(bh); 7012ac27a0ecSDave Kleikamp if (!bh) 7013ac27a0ecSDave Kleikamp goto out; 70145d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7015188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7016ac27a0ecSDave Kleikamp if (err) { 7017ac27a0ecSDave Kleikamp brelse(bh); 70181c215028STheodore Ts'o return err; 7019ac27a0ecSDave Kleikamp } 7020ac27a0ecSDave Kleikamp lock_buffer(bh); 702167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7022ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7023ac27a0ecSDave Kleikamp unlock_buffer(bh); 70240390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7025ac27a0ecSDave Kleikamp brelse(bh); 7026ac27a0ecSDave Kleikamp out: 702767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 702867eeb568SDmitry Monakhov i_size_write(inode, off + len); 7029617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 70304209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 70314209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 70324209ae12SHarshad Shirwadkar err = err2; 703321f97697SJan Kara } 70344209ae12SHarshad Shirwadkar return err ? err : len; 7035ac27a0ecSDave Kleikamp } 7036ac27a0ecSDave Kleikamp #endif 7037ac27a0ecSDave Kleikamp 7038c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 703924b58424STheodore Ts'o static inline void register_as_ext2(void) 704024b58424STheodore Ts'o { 704124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 704224b58424STheodore Ts'o if (err) 704324b58424STheodore Ts'o printk(KERN_WARNING 704424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 704524b58424STheodore Ts'o } 704624b58424STheodore Ts'o 704724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 704824b58424STheodore Ts'o { 704924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 705024b58424STheodore Ts'o } 70512035e776STheodore Ts'o 70522035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 70532035e776STheodore Ts'o { 7054e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 70552035e776STheodore Ts'o return 0; 7056bc98a42cSDavid Howells if (sb_rdonly(sb)) 70572035e776STheodore Ts'o return 1; 7058e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 70592035e776STheodore Ts'o return 0; 70602035e776STheodore Ts'o return 1; 70612035e776STheodore Ts'o } 706224b58424STheodore Ts'o #else 706324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 706424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 70652035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 706624b58424STheodore Ts'o #endif 706724b58424STheodore Ts'o 706824b58424STheodore Ts'o static inline void register_as_ext3(void) 706924b58424STheodore Ts'o { 707024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 707124b58424STheodore Ts'o if (err) 707224b58424STheodore Ts'o printk(KERN_WARNING 707324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 707424b58424STheodore Ts'o } 707524b58424STheodore Ts'o 707624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 707724b58424STheodore Ts'o { 707824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 707924b58424STheodore Ts'o } 70802035e776STheodore Ts'o 70812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 70822035e776STheodore Ts'o { 7083e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 70842035e776STheodore Ts'o return 0; 7085e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 70862035e776STheodore Ts'o return 0; 7087bc98a42cSDavid Howells if (sb_rdonly(sb)) 70882035e776STheodore Ts'o return 1; 7089e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 70902035e776STheodore Ts'o return 0; 70912035e776STheodore Ts'o return 1; 70922035e776STheodore Ts'o } 709324b58424STheodore Ts'o 709403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7095ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 709603010a33STheodore Ts'o .name = "ext4", 7097cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7098cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7099ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 710014f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7101ac27a0ecSDave Kleikamp }; 71027f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7103ac27a0ecSDave Kleikamp 7104e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7105e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7106e9e3bcecSEric Sandeen 71075dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7108ac27a0ecSDave Kleikamp { 7109e9e3bcecSEric Sandeen int i, err; 7110c9de560dSAlex Tomas 7111e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 711207c0c5d8SAl Viro ext4_li_info = NULL; 711307c0c5d8SAl Viro 71149a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 711512e9b892SDmitry Monakhov ext4_check_flag_values(); 7116e9e3bcecSEric Sandeen 7117e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7118e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7119e9e3bcecSEric Sandeen 712051865fdaSZheng Liu err = ext4_init_es(); 71216fd058f7STheodore Ts'o if (err) 71226fd058f7STheodore Ts'o return err; 712351865fdaSZheng Liu 71241dc0aa46SEric Whitney err = ext4_init_pending(); 71251dc0aa46SEric Whitney if (err) 712622cfe4b4SEric Biggers goto out7; 712722cfe4b4SEric Biggers 712822cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 712922cfe4b4SEric Biggers if (err) 71301dc0aa46SEric Whitney goto out6; 71311dc0aa46SEric Whitney 713251865fdaSZheng Liu err = ext4_init_pageio(); 713351865fdaSZheng Liu if (err) 7134b5799018STheodore Ts'o goto out5; 713551865fdaSZheng Liu 71365dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7137bd2d0210STheodore Ts'o if (err) 7138b5799018STheodore Ts'o goto out4; 7139857ac889SLukas Czerner 7140b5799018STheodore Ts'o err = ext4_init_sysfs(); 7141dd68314cSTheodore Ts'o if (err) 7142b5799018STheodore Ts'o goto out3; 7143857ac889SLukas Czerner 71445dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7145ac27a0ecSDave Kleikamp if (err) 7146c9de560dSAlex Tomas goto out2; 7147ac27a0ecSDave Kleikamp err = init_inodecache(); 7148ac27a0ecSDave Kleikamp if (err) 7149ac27a0ecSDave Kleikamp goto out1; 7150aa75f4d3SHarshad Shirwadkar 7151aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7152aa75f4d3SHarshad Shirwadkar if (err) 7153aa75f4d3SHarshad Shirwadkar goto out05; 7154aa75f4d3SHarshad Shirwadkar 715524b58424STheodore Ts'o register_as_ext3(); 71562035e776STheodore Ts'o register_as_ext2(); 715703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7158ac27a0ecSDave Kleikamp if (err) 7159ac27a0ecSDave Kleikamp goto out; 7160bfff6873SLukas Czerner 7161ac27a0ecSDave Kleikamp return 0; 7162ac27a0ecSDave Kleikamp out: 716324b58424STheodore Ts'o unregister_as_ext2(); 716424b58424STheodore Ts'o unregister_as_ext3(); 7165ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7166aa75f4d3SHarshad Shirwadkar out05: 7167ac27a0ecSDave Kleikamp destroy_inodecache(); 7168ac27a0ecSDave Kleikamp out1: 71695dabfc78STheodore Ts'o ext4_exit_mballoc(); 71709c191f70ST Makphaibulchoke out2: 7171b5799018STheodore Ts'o ext4_exit_sysfs(); 7172b5799018STheodore Ts'o out3: 7173dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7174b5799018STheodore Ts'o out4: 71755dabfc78STheodore Ts'o ext4_exit_pageio(); 7176b5799018STheodore Ts'o out5: 717722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 71781dc0aa46SEric Whitney out6: 717922cfe4b4SEric Biggers ext4_exit_pending(); 718022cfe4b4SEric Biggers out7: 718151865fdaSZheng Liu ext4_exit_es(); 718251865fdaSZheng Liu 7183ac27a0ecSDave Kleikamp return err; 7184ac27a0ecSDave Kleikamp } 7185ac27a0ecSDave Kleikamp 71865dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7187ac27a0ecSDave Kleikamp { 7188bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 718924b58424STheodore Ts'o unregister_as_ext2(); 719024b58424STheodore Ts'o unregister_as_ext3(); 719103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7192ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7193ac27a0ecSDave Kleikamp destroy_inodecache(); 71945dabfc78STheodore Ts'o ext4_exit_mballoc(); 7195b5799018STheodore Ts'o ext4_exit_sysfs(); 71965dabfc78STheodore Ts'o ext4_exit_system_zone(); 71975dabfc78STheodore Ts'o ext4_exit_pageio(); 719822cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7199dd12ed14SEric Sandeen ext4_exit_es(); 72001dc0aa46SEric Whitney ext4_exit_pending(); 7201ac27a0ecSDave Kleikamp } 7202ac27a0ecSDave Kleikamp 7203ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 720483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7205ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 72067ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 72075dabfc78STheodore Ts'o module_init(ext4_init_fs) 72085dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7209