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); 9085456054SEric Biggers static void 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) 16267c0f556SBart Van Assche static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t 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); 1741420c4a5SBart Van Assche submit_bh(REQ_OP_READ | op_flags, bh); 175fa491b14Szhangyi (F) } 176fa491b14Szhangyi (F) 17767c0f556SBart Van Assche void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t 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) 18967c0f556SBart Van Assche int ext4_read_bh(struct buffer_head *bh, blk_opf_t 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) 20667c0f556SBart Van Assche int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t 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, 23067c0f556SBart Van Assche sector_t block, 23167c0f556SBart Van Assche blk_opf_t op_flags, 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, 25167c0f556SBart Van Assche blk_opf_t op_flags) 2528394a6abSzhangyi (F) { 2538394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2548394a6abSzhangyi (F) } 2558394a6abSzhangyi (F) 2568394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2578394a6abSzhangyi (F) sector_t block) 2588394a6abSzhangyi (F) { 2598394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2608394a6abSzhangyi (F) } 2618394a6abSzhangyi (F) 2625df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2635df1d412Szhangyi (F) { 2645df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2655df1d412Szhangyi (F) 2665df1d412Szhangyi (F) if (likely(bh)) { 2675df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2685df1d412Szhangyi (F) brelse(bh); 2695df1d412Szhangyi (F) } 270c197855eSStephen Hemminger } 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2739aa5d32bSDmitry Monakhov struct ext4_super_block *es) 274a9c47317SDarrick J. Wong { 275a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 276a9c47317SDarrick J. Wong return 1; 277a9c47317SDarrick J. Wong 278a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27906db49e6STheodore Ts'o } 280a9c47317SDarrick J. Wong 281bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 282a9c47317SDarrick J. Wong struct ext4_super_block *es) 283a9c47317SDarrick J. Wong { 284a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 285a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 286a9c47317SDarrick J. Wong __u32 csum; 287a9c47317SDarrick J. Wong 288a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 289a9c47317SDarrick J. Wong 290a9c47317SDarrick J. Wong return cpu_to_le32(csum); 291a9c47317SDarrick J. Wong } 292a9c47317SDarrick J. Wong 293a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 294a9c47317SDarrick J. Wong struct ext4_super_block *es) 295a9c47317SDarrick J. Wong { 296a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 297a9c47317SDarrick J. Wong return 1; 298a9c47317SDarrick J. Wong 299a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 300a9c47317SDarrick J. Wong } 301a9c47317SDarrick J. Wong 302a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 303a9c47317SDarrick J. Wong { 30406db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 30506db49e6STheodore Ts'o 3069aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 307a9c47317SDarrick J. Wong return; 308a9c47317SDarrick J. Wong 309a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 310a9c47317SDarrick J. Wong } 311a9c47317SDarrick J. Wong 3128fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3138fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 314bd81d8eeSLaurent Vivier { 3153a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3168fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3178fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 318bd81d8eeSLaurent Vivier } 319bd81d8eeSLaurent Vivier 3208fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3218fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 322bd81d8eeSLaurent Vivier { 3235272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3248fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3258fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 326bd81d8eeSLaurent Vivier } 327bd81d8eeSLaurent Vivier 3288fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3298fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 330bd81d8eeSLaurent Vivier { 3315272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3328fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3338fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 334bd81d8eeSLaurent Vivier } 335bd81d8eeSLaurent Vivier 336021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 337560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 338560671a0SAneesh Kumar K.V { 339560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 340560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 341560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 342560671a0SAneesh Kumar K.V } 343560671a0SAneesh Kumar K.V 344560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 345560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 346560671a0SAneesh Kumar K.V { 347560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 348560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 349560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 350560671a0SAneesh Kumar K.V } 351560671a0SAneesh Kumar K.V 352560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 353560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 354560671a0SAneesh Kumar K.V { 355560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 356560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 357560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 358560671a0SAneesh Kumar K.V } 359560671a0SAneesh Kumar K.V 360560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 361560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 362560671a0SAneesh Kumar K.V { 363560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 364560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 365560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 366560671a0SAneesh Kumar K.V } 367560671a0SAneesh Kumar K.V 3688fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3698fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 370bd81d8eeSLaurent Vivier { 3713a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3728fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3738fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 374bd81d8eeSLaurent Vivier } 375bd81d8eeSLaurent Vivier 3768fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3778fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 378bd81d8eeSLaurent Vivier { 3795272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3808fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3818fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 382bd81d8eeSLaurent Vivier } 383bd81d8eeSLaurent Vivier 3848fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3858fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 386bd81d8eeSLaurent Vivier { 3875272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3888fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3898fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 390bd81d8eeSLaurent Vivier } 391bd81d8eeSLaurent Vivier 392021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 393560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 394560671a0SAneesh Kumar K.V { 395560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 396560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 397560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 398560671a0SAneesh Kumar K.V } 399560671a0SAneesh Kumar K.V 400560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 401560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 402560671a0SAneesh Kumar K.V { 403560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 404560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 405560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 406560671a0SAneesh Kumar K.V } 407560671a0SAneesh Kumar K.V 408560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 409560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 410560671a0SAneesh Kumar K.V { 411560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 412560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 413560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 414560671a0SAneesh Kumar K.V } 415560671a0SAneesh Kumar K.V 416560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 417560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 418560671a0SAneesh Kumar K.V { 419560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 420560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 421560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 422560671a0SAneesh Kumar K.V } 423560671a0SAneesh Kumar K.V 424c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4256a0678a7SArnd Bergmann { 4266a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4276a0678a7SArnd Bergmann 4286a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4296a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4306a0678a7SArnd Bergmann } 4316a0678a7SArnd Bergmann 4326a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4336a0678a7SArnd Bergmann { 4346a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4356a0678a7SArnd Bergmann } 4366a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 437c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 438c92dc856SJan Kara ktime_get_real_seconds()) 4396a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4406a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 441d3d1faf6SCurt Wohlgemuth 442bdfe0cbdSTheodore Ts'o /* 443bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 444bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 445bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 446bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 447bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 448bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 449bdfe0cbdSTheodore Ts'o */ 450bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 451bdfe0cbdSTheodore Ts'o { 452bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 453bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 454bdfe0cbdSTheodore Ts'o 455bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 456bdfe0cbdSTheodore Ts'o } 457bdfe0cbdSTheodore Ts'o 45818aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45918aadd47SBobi Jam { 46018aadd47SBobi Jam struct super_block *sb = journal->j_private; 46118aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 46218aadd47SBobi Jam int error = is_journal_aborted(journal); 4635d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 46418aadd47SBobi Jam 4655d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 466a0154344SDaeho Jeong 467a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 468a0154344SDaeho Jeong 46918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4705d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4715d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4725d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 47318aadd47SBobi Jam list_del_init(&jce->jce_list); 47418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47518aadd47SBobi Jam jce->jce_func(sb, jce, error); 47618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47718aadd47SBobi Jam } 47818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47918aadd47SBobi Jam } 4801c13d5c0STheodore Ts'o 481afb585a9SMauricio Faria de Oliveira /* 482afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 483afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 484afb585a9SMauricio Faria de Oliveira * 485afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 486afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 487afb585a9SMauricio Faria de Oliveira * to write protect the pages. 488afb585a9SMauricio Faria de Oliveira * 489afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 490afb585a9SMauricio Faria de Oliveira */ 491afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 492afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 493afb585a9SMauricio Faria de Oliveira void *data) 494afb585a9SMauricio Faria de Oliveira { 495afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 496afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 497afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 498afb585a9SMauricio Faria de Oliveira 499afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 500afb585a9SMauricio Faria de Oliveira do { 501afb585a9SMauricio Faria de Oliveira /* 502afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 503afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 504afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 505afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 506afb585a9SMauricio Faria de Oliveira * properly. 507afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 508afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 509afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 510afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 511afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 512afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 513afb585a9SMauricio Faria de Oliveira */ 514afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 515afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 516afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 517afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 518afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 519afb585a9SMauricio Faria de Oliveira goto out; 520afb585a9SMauricio Faria de Oliveira } 521afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 522afb585a9SMauricio Faria de Oliveira 523afb585a9SMauricio Faria de Oliveira out: 524afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 525afb585a9SMauricio Faria de Oliveira } 526afb585a9SMauricio Faria de Oliveira 527afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 528afb585a9SMauricio Faria de Oliveira { 529afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 530afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 531afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 532afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 533afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 534afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 535afb585a9SMauricio Faria de Oliveira }; 536afb585a9SMauricio Faria de Oliveira 537afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 538afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 539afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 540afb585a9SMauricio Faria de Oliveira } 541afb585a9SMauricio Faria de Oliveira 542afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 543afb585a9SMauricio Faria de Oliveira { 544afb585a9SMauricio Faria de Oliveira int ret; 545afb585a9SMauricio Faria de Oliveira 546afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 547afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 548afb585a9SMauricio Faria de Oliveira else 549afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 550afb585a9SMauricio Faria de Oliveira 551afb585a9SMauricio Faria de Oliveira return ret; 552afb585a9SMauricio Faria de Oliveira } 553afb585a9SMauricio Faria de Oliveira 554afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 555afb585a9SMauricio Faria de Oliveira { 556afb585a9SMauricio Faria de Oliveira int ret = 0; 557afb585a9SMauricio Faria de Oliveira 558afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 559afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 560afb585a9SMauricio Faria de Oliveira 561afb585a9SMauricio Faria de Oliveira return ret; 562afb585a9SMauricio Faria de Oliveira } 563afb585a9SMauricio Faria de Oliveira 5641dc1097fSJan Kara static bool system_going_down(void) 5651dc1097fSJan Kara { 5661dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5671dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5681dc1097fSJan Kara } 5691dc1097fSJan Kara 57002a7780eSJan Kara struct ext4_err_translation { 57102a7780eSJan Kara int code; 57202a7780eSJan Kara int errno; 57302a7780eSJan Kara }; 57402a7780eSJan Kara 57502a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 57602a7780eSJan Kara 57702a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58702a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58802a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 58902a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 59002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 59102a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 59202a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 59302a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 59402a7780eSJan Kara }; 59502a7780eSJan Kara 59602a7780eSJan Kara static int ext4_errno_to_code(int errno) 59702a7780eSJan Kara { 59802a7780eSJan Kara int i; 59902a7780eSJan Kara 60002a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 60102a7780eSJan Kara if (err_translation[i].errno == errno) 60202a7780eSJan Kara return err_translation[i].code; 60302a7780eSJan Kara return EXT4_ERR_UNKNOWN; 60402a7780eSJan Kara } 60502a7780eSJan Kara 6062d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60740676623SJan Kara __u32 ino, __u64 block, 60840676623SJan Kara const char *func, unsigned int line) 60940676623SJan Kara { 610c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 61140676623SJan Kara 61202a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 61302a7780eSJan Kara if (error == 0) 61402a7780eSJan Kara error = EFSCORRUPTED; 615c92dc856SJan Kara 616c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 617c92dc856SJan Kara sbi->s_add_error_count++; 618c92dc856SJan Kara sbi->s_last_error_code = error; 619c92dc856SJan Kara sbi->s_last_error_line = line; 620c92dc856SJan Kara sbi->s_last_error_ino = ino; 621c92dc856SJan Kara sbi->s_last_error_block = block; 622c92dc856SJan Kara sbi->s_last_error_func = func; 623c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 624c92dc856SJan Kara if (!sbi->s_first_error_time) { 625c92dc856SJan Kara sbi->s_first_error_code = error; 626c92dc856SJan Kara sbi->s_first_error_line = line; 627c92dc856SJan Kara sbi->s_first_error_ino = ino; 628c92dc856SJan Kara sbi->s_first_error_block = block; 629c92dc856SJan Kara sbi->s_first_error_func = func; 630c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 63140676623SJan Kara } 632c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 63340676623SJan Kara } 63440676623SJan Kara 635ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 636ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 637ac27a0ecSDave Kleikamp * 638ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 639617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 640ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 641ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 642ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 643ac27a0ecSDave Kleikamp * write out the superblock safely. 644ac27a0ecSDave Kleikamp * 645dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 646d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 647ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 648014c9caaSJan Kara * 649014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 650014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 651014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 652014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 653014c9caaSJan Kara * at a critical moment in log management. 654ac27a0ecSDave Kleikamp */ 655e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 656e789ca0cSJan Kara __u32 ino, __u64 block, 657e789ca0cSJan Kara const char *func, unsigned int line) 658ac27a0ecSDave Kleikamp { 659b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6602d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 661b08070ecSJan Kara 662e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 663327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 664327eaf73STheodore Ts'o WARN_ON_ONCE(1); 665327eaf73STheodore Ts'o 6662d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6679b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 668ac27a0ecSDave Kleikamp if (journal) 669dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6702d01ddc8SJan Kara } 6712d01ddc8SJan Kara 6722d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6732d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6742d01ddc8SJan Kara /* 6752d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6762d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6772d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6782d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6792d01ddc8SJan Kara */ 680bb9464e0Syangerkun if (continue_fs && journal) 6812d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6822d01ddc8SJan Kara else 6832d01ddc8SJan Kara ext4_commit_super(sb); 6842d01ddc8SJan Kara } 6852d01ddc8SJan Kara 6861dc1097fSJan Kara /* 6871dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6881dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6891dc1097fSJan Kara * disabled. 6901dc1097fSJan Kara */ 691014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 692617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 693ac27a0ecSDave Kleikamp sb->s_id); 694ac27a0ecSDave Kleikamp } 695ac2f7ca5SYe Bin 696ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 697ac2f7ca5SYe Bin return; 698ac2f7ca5SYe Bin 699014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 700014c9caaSJan Kara /* 701014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 702014c9caaSJan Kara * ->s_flags update 703014c9caaSJan Kara */ 704014c9caaSJan Kara smp_wmb(); 705014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7064327ba52SDaeho Jeong } 707ac27a0ecSDave Kleikamp 708c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 709c92dc856SJan Kara { 710c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 711c92dc856SJan Kara s_error_work); 7122d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7132d01ddc8SJan Kara handle_t *handle; 714c92dc856SJan Kara 7152d01ddc8SJan Kara /* 7162d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7172d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7182d01ddc8SJan Kara * updates. 7192d01ddc8SJan Kara * 7202d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7212d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7222d01ddc8SJan Kara */ 7232d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 724558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7252d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7262d01ddc8SJan Kara if (IS_ERR(handle)) 7272d01ddc8SJan Kara goto write_directly; 728558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7292d01ddc8SJan Kara jbd2_journal_stop(handle); 7302d01ddc8SJan Kara goto write_directly; 7312d01ddc8SJan Kara } 7322d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 733558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 734558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 735558d6450SYe Bin "superblock detected"); 736558d6450SYe Bin clear_buffer_write_io_error(sbh); 737558d6450SYe Bin set_buffer_uptodate(sbh); 738558d6450SYe Bin } 739558d6450SYe Bin 740558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7412d01ddc8SJan Kara jbd2_journal_stop(handle); 7422d01ddc8SJan Kara goto write_directly; 7432d01ddc8SJan Kara } 7442d01ddc8SJan Kara jbd2_journal_stop(handle); 745d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7462d01ddc8SJan Kara return; 7472d01ddc8SJan Kara } 7482d01ddc8SJan Kara write_directly: 7492d01ddc8SJan Kara /* 7502d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7512d01ddc8SJan Kara * out and hope for the best. 7522d01ddc8SJan Kara */ 7534392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 754d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 755ac27a0ecSDave Kleikamp } 756ac27a0ecSDave Kleikamp 757efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 758efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 759efbed4dcSTheodore Ts'o "EXT4-fs error") 760efbed4dcSTheodore Ts'o 76112062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 762014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 76354d3adbcSTheodore Ts'o const char *fmt, ...) 764ac27a0ecSDave Kleikamp { 7650ff2ea7dSJoe Perches struct va_format vaf; 766ac27a0ecSDave Kleikamp va_list args; 767ac27a0ecSDave Kleikamp 7680db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7690db1ff22STheodore Ts'o return; 7700db1ff22STheodore Ts'o 771ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 772efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 773ac27a0ecSDave Kleikamp va_start(args, fmt); 7740ff2ea7dSJoe Perches vaf.fmt = fmt; 7750ff2ea7dSJoe Perches vaf.va = &args; 776efbed4dcSTheodore Ts'o printk(KERN_CRIT 777efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7780ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 779ac27a0ecSDave Kleikamp va_end(args); 780efbed4dcSTheodore Ts'o } 7819a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7829a089b21SGabriel Krisman Bertazi 783e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 784ac27a0ecSDave Kleikamp } 785ac27a0ecSDave Kleikamp 786e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78754d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 788273df556SFrank Mayhar const char *fmt, ...) 789273df556SFrank Mayhar { 790273df556SFrank Mayhar va_list args; 791f7c21177STheodore Ts'o struct va_format vaf; 792273df556SFrank Mayhar 7930db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7940db1ff22STheodore Ts'o return; 7950db1ff22STheodore Ts'o 796ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 797efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 798273df556SFrank Mayhar va_start(args, fmt); 799f7c21177STheodore Ts'o vaf.fmt = fmt; 800f7c21177STheodore Ts'o vaf.va = &args; 801c398eda0STheodore Ts'o if (block) 802d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 803d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 804d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 805d9ee81daSJoe Perches block, current->comm, &vaf); 806d9ee81daSJoe Perches else 807d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 808d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 809d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 810d9ee81daSJoe Perches current->comm, &vaf); 811273df556SFrank Mayhar va_end(args); 812efbed4dcSTheodore Ts'o } 8139a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8149a089b21SGabriel Krisman Bertazi 815e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 81654d3adbcSTheodore Ts'o function, line); 817273df556SFrank Mayhar } 818273df556SFrank Mayhar 819e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 820f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 821f7c21177STheodore Ts'o const char *fmt, ...) 822273df556SFrank Mayhar { 823273df556SFrank Mayhar va_list args; 824f7c21177STheodore Ts'o struct va_format vaf; 825496ad9aaSAl Viro struct inode *inode = file_inode(file); 826273df556SFrank Mayhar char pathname[80], *path; 827273df556SFrank Mayhar 8280db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8290db1ff22STheodore Ts'o return; 8300db1ff22STheodore Ts'o 831ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 832efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8339bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 834f9a62d09SDan Carpenter if (IS_ERR(path)) 835273df556SFrank Mayhar path = "(unknown)"; 836f7c21177STheodore Ts'o va_start(args, fmt); 837f7c21177STheodore Ts'o vaf.fmt = fmt; 838f7c21177STheodore Ts'o vaf.va = &args; 839d9ee81daSJoe Perches if (block) 840d9ee81daSJoe Perches printk(KERN_CRIT 841d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 842d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 843d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 844d9ee81daSJoe Perches block, current->comm, path, &vaf); 845d9ee81daSJoe Perches else 846d9ee81daSJoe Perches printk(KERN_CRIT 847d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 848d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 849d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 850d9ee81daSJoe Perches current->comm, path, &vaf); 851273df556SFrank Mayhar va_end(args); 852efbed4dcSTheodore Ts'o } 8539a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8549a089b21SGabriel Krisman Bertazi 855e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 85654d3adbcSTheodore Ts'o function, line); 857273df556SFrank Mayhar } 858273df556SFrank Mayhar 859722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 860ac27a0ecSDave Kleikamp char nbuf[16]) 861ac27a0ecSDave Kleikamp { 862ac27a0ecSDave Kleikamp char *errstr = NULL; 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp switch (errno) { 8656a797d27SDarrick J. Wong case -EFSCORRUPTED: 8666a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8676a797d27SDarrick J. Wong break; 8686a797d27SDarrick J. Wong case -EFSBADCRC: 8696a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8706a797d27SDarrick J. Wong break; 871ac27a0ecSDave Kleikamp case -EIO: 872ac27a0ecSDave Kleikamp errstr = "IO failure"; 873ac27a0ecSDave Kleikamp break; 874ac27a0ecSDave Kleikamp case -ENOMEM: 875ac27a0ecSDave Kleikamp errstr = "Out of memory"; 876ac27a0ecSDave Kleikamp break; 877ac27a0ecSDave Kleikamp case -EROFS: 87878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 87978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 880ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 881ac27a0ecSDave Kleikamp else 882ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 883ac27a0ecSDave Kleikamp break; 884ac27a0ecSDave Kleikamp default: 885ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 886ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 887ac27a0ecSDave Kleikamp * NULL. */ 888ac27a0ecSDave Kleikamp if (nbuf) { 889ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 890ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 891ac27a0ecSDave Kleikamp errstr = nbuf; 892ac27a0ecSDave Kleikamp } 893ac27a0ecSDave Kleikamp break; 894ac27a0ecSDave Kleikamp } 895ac27a0ecSDave Kleikamp 896ac27a0ecSDave Kleikamp return errstr; 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 899617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 900ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 901ac27a0ecSDave Kleikamp 902c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 903c398eda0STheodore Ts'o unsigned int line, int errno) 904ac27a0ecSDave Kleikamp { 905ac27a0ecSDave Kleikamp char nbuf[16]; 906ac27a0ecSDave Kleikamp const char *errstr; 907ac27a0ecSDave Kleikamp 9080db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9090db1ff22STheodore Ts'o return; 9100db1ff22STheodore Ts'o 911ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 912ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 913ac27a0ecSDave Kleikamp * an error. */ 914bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 915ac27a0ecSDave Kleikamp return; 916ac27a0ecSDave Kleikamp 917efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 918617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 919c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 920c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 921efbed4dcSTheodore Ts'o } 9229a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 923ac27a0ecSDave Kleikamp 924e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 925ac27a0ecSDave Kleikamp } 926ac27a0ecSDave Kleikamp 927e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 928e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 929b31e1552SEric Sandeen { 9300ff2ea7dSJoe Perches struct va_format vaf; 931b31e1552SEric Sandeen va_list args; 932b31e1552SEric Sandeen 933da812f61SLukas Czerner if (sb) { 9341cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 935da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 936da812f61SLukas Czerner "EXT4-fs")) 937efbed4dcSTheodore Ts'o return; 938da812f61SLukas Czerner } 939efbed4dcSTheodore Ts'o 940b31e1552SEric Sandeen va_start(args, fmt); 9410ff2ea7dSJoe Perches vaf.fmt = fmt; 9420ff2ea7dSJoe Perches vaf.va = &args; 943da812f61SLukas Czerner if (sb) 9440ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 945da812f61SLukas Czerner else 946da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 947b31e1552SEric Sandeen va_end(args); 948b31e1552SEric Sandeen } 949b31e1552SEric Sandeen 9501cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9511cf006edSDmitry Monakhov { 9521cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9531cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9541cf006edSDmitry Monakhov "EXT4-fs warning"); 9551cf006edSDmitry Monakhov } 956b03a2f7eSAndreas Dilger 95712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 958c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 959ac27a0ecSDave Kleikamp { 9600ff2ea7dSJoe Perches struct va_format vaf; 961ac27a0ecSDave Kleikamp va_list args; 962ac27a0ecSDave Kleikamp 963b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 964efbed4dcSTheodore Ts'o return; 965efbed4dcSTheodore Ts'o 966ac27a0ecSDave Kleikamp va_start(args, fmt); 9670ff2ea7dSJoe Perches vaf.fmt = fmt; 9680ff2ea7dSJoe Perches vaf.va = &args; 9690ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9700ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 971ac27a0ecSDave Kleikamp va_end(args); 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 974b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 975b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 976b03a2f7eSAndreas Dilger { 977b03a2f7eSAndreas Dilger struct va_format vaf; 978b03a2f7eSAndreas Dilger va_list args; 979b03a2f7eSAndreas Dilger 980b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 981b03a2f7eSAndreas Dilger return; 982b03a2f7eSAndreas Dilger 983b03a2f7eSAndreas Dilger va_start(args, fmt); 984b03a2f7eSAndreas Dilger vaf.fmt = fmt; 985b03a2f7eSAndreas Dilger vaf.va = &args; 986b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 987b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 988b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 989b03a2f7eSAndreas Dilger va_end(args); 990b03a2f7eSAndreas Dilger } 991b03a2f7eSAndreas Dilger 992e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 993e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 994e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 995e29136f8STheodore Ts'o const char *fmt, ...) 9965d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9975d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9985d1b1b3fSAneesh Kumar K.V { 9990ff2ea7dSJoe Perches struct va_format vaf; 10005d1b1b3fSAneesh Kumar K.V va_list args; 10015d1b1b3fSAneesh Kumar K.V 10020db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 10030db1ff22STheodore Ts'o return; 10040db1ff22STheodore Ts'o 1005ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1006efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10075d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10080ff2ea7dSJoe Perches vaf.fmt = fmt; 10090ff2ea7dSJoe Perches vaf.va = &args; 101021149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1011e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1012e29136f8STheodore Ts'o if (ino) 10130ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1014e29136f8STheodore Ts'o if (block) 1015efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1016efbed4dcSTheodore Ts'o (unsigned long long) block); 10170ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10185d1b1b3fSAneesh Kumar K.V va_end(args); 1019efbed4dcSTheodore Ts'o } 10205d1b1b3fSAneesh Kumar K.V 1021c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1022327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1023327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1024e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10252d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10262d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10272d01ddc8SJan Kara line); 1028c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10292d01ddc8SJan Kara } 10305d1b1b3fSAneesh Kumar K.V return; 10315d1b1b3fSAneesh Kumar K.V } 10325d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1033e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10345d1b1b3fSAneesh Kumar K.V /* 10355d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10365d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10375d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10385d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10395d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 104025985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10415d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10425d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10435d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10445d1b1b3fSAneesh Kumar K.V */ 10455d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10465d1b1b3fSAneesh Kumar K.V return; 10475d1b1b3fSAneesh Kumar K.V } 10485d1b1b3fSAneesh Kumar K.V 1049db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1050db79e6d1SWang Shilong ext4_group_t group, 1051db79e6d1SWang Shilong unsigned int flags) 1052db79e6d1SWang Shilong { 1053db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1054db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1055db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10569af0b3d1SWang Shilong int ret; 1057db79e6d1SWang Shilong 10589af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10599af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10609af0b3d1SWang Shilong &grp->bb_state); 10619af0b3d1SWang Shilong if (!ret) 1062db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1063db79e6d1SWang Shilong grp->bb_free); 1064db79e6d1SWang Shilong } 1065db79e6d1SWang Shilong 10669af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10679af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10689af0b3d1SWang Shilong &grp->bb_state); 10699af0b3d1SWang Shilong if (!ret && gdp) { 1070db79e6d1SWang Shilong int count; 1071db79e6d1SWang Shilong 1072db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1073db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1074db79e6d1SWang Shilong count); 1075db79e6d1SWang Shilong } 1076db79e6d1SWang Shilong } 1077db79e6d1SWang Shilong } 1078db79e6d1SWang Shilong 1079617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1080ac27a0ecSDave Kleikamp { 1081617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1082ac27a0ecSDave Kleikamp 1083617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1084ac27a0ecSDave Kleikamp return; 1085ac27a0ecSDave Kleikamp 108612062dddSEric Sandeen ext4_warning(sb, 1087ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1088ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1089617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1090ac27a0ecSDave Kleikamp 1091617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1092617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1093617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1094ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1095ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1096ac27a0ecSDave Kleikamp 1097ac27a0ecSDave Kleikamp /* 1098ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1099ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1100ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1101ac27a0ecSDave Kleikamp */ 1102ac27a0ecSDave Kleikamp } 1103ac27a0ecSDave Kleikamp 1104ac27a0ecSDave Kleikamp /* 1105ac27a0ecSDave Kleikamp * Open the external journal device 1106ac27a0ecSDave Kleikamp */ 1107b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1108ac27a0ecSDave Kleikamp { 1109ac27a0ecSDave Kleikamp struct block_device *bdev; 1110ac27a0ecSDave Kleikamp 1111d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1112ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1113ac27a0ecSDave Kleikamp goto fail; 1114ac27a0ecSDave Kleikamp return bdev; 1115ac27a0ecSDave Kleikamp 1116ac27a0ecSDave Kleikamp fail: 1117ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1118ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1119ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1120ac27a0ecSDave Kleikamp return NULL; 1121ac27a0ecSDave Kleikamp } 1122ac27a0ecSDave Kleikamp 1123ac27a0ecSDave Kleikamp /* 1124ac27a0ecSDave Kleikamp * Release the journal device 1125ac27a0ecSDave Kleikamp */ 11264385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1127ac27a0ecSDave Kleikamp { 11284385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1129ac27a0ecSDave Kleikamp } 1130ac27a0ecSDave Kleikamp 11314385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1132ac27a0ecSDave Kleikamp { 1133ac27a0ecSDave Kleikamp struct block_device *bdev; 1134ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1135ac27a0ecSDave Kleikamp if (bdev) { 11364385bab1SAl Viro ext4_blkdev_put(bdev); 1137ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1138ac27a0ecSDave Kleikamp } 1139ac27a0ecSDave Kleikamp } 1140ac27a0ecSDave Kleikamp 1141ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1142ac27a0ecSDave Kleikamp { 1143617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1144ac27a0ecSDave Kleikamp } 1145ac27a0ecSDave Kleikamp 1146617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1147ac27a0ecSDave Kleikamp { 1148ac27a0ecSDave Kleikamp struct list_head *l; 1149ac27a0ecSDave Kleikamp 1150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1151ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1152ac27a0ecSDave Kleikamp 1153ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1154ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1155ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1156ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1157ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1158ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1159ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1160ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1161ac27a0ecSDave Kleikamp } 1162ac27a0ecSDave Kleikamp } 1163ac27a0ecSDave Kleikamp 1164957153fcSJan Kara #ifdef CONFIG_QUOTA 1165957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1166957153fcSJan Kara 1167957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1168957153fcSJan Kara { 1169957153fcSJan Kara int type; 1170957153fcSJan Kara 1171957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1172957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1173957153fcSJan Kara ext4_quota_off(sb, type); 1174957153fcSJan Kara } 117533458eabSTheodore Ts'o 117633458eabSTheodore Ts'o /* 117733458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117833458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117933458eabSTheodore Ts'o */ 118033458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 118133458eabSTheodore Ts'o struct ext4_sb_info *sbi, 118233458eabSTheodore Ts'o int type) 118333458eabSTheodore Ts'o { 118433458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 118533458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118633458eabSTheodore Ts'o } 1187957153fcSJan Kara #else 1188957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1189957153fcSJan Kara { 1190957153fcSJan Kara } 1191957153fcSJan Kara #endif 1192957153fcSJan Kara 1193617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1194ac27a0ecSDave Kleikamp { 1195617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1196617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11971d0c3924STheodore Ts'o struct buffer_head **group_desc; 11987c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 119997abd7d4STheodore Ts'o int aborted = 0; 1200ef2cabf7SHidehiro Kawai int i, err; 1201ac27a0ecSDave Kleikamp 1202b98535d0SYe Bin /* 1203b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1204b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1205b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1206b98535d0SYe Bin * Unregister sysfs before flush sbi->s_error_work. 1207b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1208b98535d0SYe Bin * read metadata verify failed then will queue error work. 1209b98535d0SYe Bin * flush_stashed_error_work will call start_this_handle may trigger 1210b98535d0SYe Bin * BUG_ON. 1211b98535d0SYe Bin */ 1212b98535d0SYe Bin ext4_unregister_sysfs(sb); 1213b98535d0SYe Bin 12144808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 12154808cb5bSZhang Yi ext4_msg(sb, KERN_INFO, "unmounting filesystem."); 12164808cb5bSZhang Yi 1217857ac889SLukas Czerner ext4_unregister_li_request(sb); 1218957153fcSJan Kara ext4_quota_off_umount(sb); 1219e0ccfd95SChristoph Hellwig 1220c92dc856SJan Kara flush_work(&sbi->s_error_work); 12212e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 122202f310fcSJan Kara ext4_release_orphan_info(sb); 12234c0425ffSMingming Cao 12240390131bSFrank Mayhar if (sbi->s_journal) { 122597abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1226ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 122747b4a50bSJan Kara sbi->s_journal = NULL; 1228878520acSTheodore Ts'o if ((err < 0) && !aborted) { 122954d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12300390131bSFrank Mayhar } 1231878520acSTheodore Ts'o } 1232d4edac31SJosef Bacik 1233d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12349105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1235d4edac31SJosef Bacik ext4_release_system_zone(sb); 1236d4edac31SJosef Bacik ext4_mb_release(sb); 1237d4edac31SJosef Bacik ext4_ext_release(sb); 1238d4edac31SJosef Bacik 1239bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1240e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 124102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1242ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1243ac27a0ecSDave Kleikamp } 1244bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12454392fbc4SJan Kara ext4_commit_super(sb); 1246a8e25a83SArtem Bityutskiy 12471d0c3924STheodore Ts'o rcu_read_lock(); 12481d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1249ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12501d0c3924STheodore Ts'o brelse(group_desc[i]); 12511d0c3924STheodore Ts'o kvfree(group_desc); 12527c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12537c990728SSuraj Jitindar Singh if (flex_groups) { 12547c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12557c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12567c990728SSuraj Jitindar Singh kvfree(flex_groups); 12577c990728SSuraj Jitindar Singh } 12581d0c3924STheodore Ts'o rcu_read_unlock(); 125957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1260ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1261ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 126257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1263efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1264bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1265ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1266a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 126733458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1268ac27a0ecSDave Kleikamp #endif 1269ac27a0ecSDave Kleikamp 1270ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1271ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1272ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1273ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1274ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1275ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1276837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1277ac27a0ecSDave Kleikamp 127889d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1279f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1280ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1281ac27a0ecSDave Kleikamp /* 1282ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1283ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1284ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1285ac27a0ecSDave Kleikamp */ 1286ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1287ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1288617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1289ac27a0ecSDave Kleikamp } 129050c15df6SChengguang Xu 1291dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1292dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 129350c15df6SChengguang Xu 129447387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 129547387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 129650c15df6SChengguang Xu 1297618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1298618f0031SPavel Skripkin 12999060dd2cSEric Sandeen brelse(sbi->s_sbh); 1300ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 13013197ebdbSTheodore Ts'o /* 13023197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13033197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13043197ebdbSTheodore Ts'o */ 13053197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13063197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13070441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13080441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1309705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13108012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1311ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13125298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1313f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1314c83ad55eSGabriel Krisman Bertazi #endif 1315ac27a0ecSDave Kleikamp kfree(sbi); 1316ac27a0ecSDave Kleikamp } 1317ac27a0ecSDave Kleikamp 1318e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1319ac27a0ecSDave Kleikamp 1320ac27a0ecSDave Kleikamp /* 1321ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1322ac27a0ecSDave Kleikamp */ 1323617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1324ac27a0ecSDave Kleikamp { 1325617ba13bSMingming Cao struct ext4_inode_info *ei; 1326ac27a0ecSDave Kleikamp 1327fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1328ac27a0ecSDave Kleikamp if (!ei) 1329ac27a0ecSDave Kleikamp return NULL; 13300b8e58a1SAndreas Dilger 1331ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1332202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1333c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 133427bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1335c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13369a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13379a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1338edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1339eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1340edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1341dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1342d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1343d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13441dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1345a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1346a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 134796c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1348a9e7f447SDmitry Monakhov #endif 13498aefcd55STheodore Ts'o ei->jinode = NULL; 13502e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1351744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1352b436b9beSJan Kara ei->i_sync_tid = 0; 1353b436b9beSJan Kara ei->i_datasync_tid = 0; 1354e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13552e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1356aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1357aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1358ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1359ac27a0ecSDave Kleikamp } 1360ac27a0ecSDave Kleikamp 13617ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13627ff9c073STheodore Ts'o { 13637ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13647ff9c073STheodore Ts'o 136529b3692eSEric Biggers if (!drop) 136629b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 136729b3692eSEric Biggers 13687ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13697ff9c073STheodore Ts'o return drop; 13707ff9c073STheodore Ts'o } 13717ff9c073STheodore Ts'o 137294053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1373fa0d7e3dSNick Piggin { 13742c58d548SEric Biggers fscrypt_free_inode(inode); 1375aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1376aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1377aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1378aa75f4d3SHarshad Shirwadkar } 1379fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1380fa0d7e3dSNick Piggin } 1381fa0d7e3dSNick Piggin 1382617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1383ac27a0ecSDave Kleikamp { 13849f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1385b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1386b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1387b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13889f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13899f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13909f7dd93dSVasily Averin true); 13919f7dd93dSVasily Averin dump_stack(); 13929f7dd93dSVasily Averin } 13936fed8395SJeffle Xu 13946fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13956fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13966fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13976fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13986fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1399ac27a0ecSDave Kleikamp } 1400ac27a0ecSDave Kleikamp 140151cc5068SAlexey Dobriyan static void init_once(void *foo) 1402ac27a0ecSDave Kleikamp { 1403c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1404ac27a0ecSDave Kleikamp 1405ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1406ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14070e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1408ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1409aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1410ac27a0ecSDave Kleikamp } 1411ac27a0ecSDave Kleikamp 1412e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1413ac27a0ecSDave Kleikamp { 1414f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1415f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1416f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1417f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1418f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1419f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 142020c2df83SPaul Mundt init_once); 1421617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1422ac27a0ecSDave Kleikamp return -ENOMEM; 1423ac27a0ecSDave Kleikamp return 0; 1424ac27a0ecSDave Kleikamp } 1425ac27a0ecSDave Kleikamp 1426ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1427ac27a0ecSDave Kleikamp { 14288c0a8537SKirill A. Shutemov /* 14298c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14308c0a8537SKirill A. Shutemov * destroy cache. 14318c0a8537SKirill A. Shutemov */ 14328c0a8537SKirill A. Shutemov rcu_barrier(); 1433617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1434ac27a0ecSDave Kleikamp } 1435ac27a0ecSDave Kleikamp 14360930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1437ac27a0ecSDave Kleikamp { 1438aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14390930fcc1SAl Viro invalidate_inode_buffers(inode); 1440dbd5768fSJan Kara clear_inode(inode); 144127bc446eSbrookxu ext4_discard_preallocations(inode, 0); 144251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1443f4c2d372SJan Kara dquot_drop(inode); 14448aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14458aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14468aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14478aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14488aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14498aefcd55STheodore Ts'o } 14503d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1451c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1452ac27a0ecSDave Kleikamp } 1453ac27a0ecSDave Kleikamp 14541b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14551b961ac0SChristoph Hellwig u64 ino, u32 generation) 1456ac27a0ecSDave Kleikamp { 1457ac27a0ecSDave Kleikamp struct inode *inode; 1458ac27a0ecSDave Kleikamp 14598a363970STheodore Ts'o /* 1460ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1461ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1462ac27a0ecSDave Kleikamp */ 14638a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14641d1fe1eeSDavid Howells if (IS_ERR(inode)) 14651d1fe1eeSDavid Howells return ERR_CAST(inode); 14661d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1467ac27a0ecSDave Kleikamp iput(inode); 1468ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1469ac27a0ecSDave Kleikamp } 14701b961ac0SChristoph Hellwig 14711b961ac0SChristoph Hellwig return inode; 1472ac27a0ecSDave Kleikamp } 14731b961ac0SChristoph Hellwig 14741b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14751b961ac0SChristoph Hellwig int fh_len, int fh_type) 14761b961ac0SChristoph Hellwig { 14771b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14781b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14791b961ac0SChristoph Hellwig } 14801b961ac0SChristoph Hellwig 14811b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14821b961ac0SChristoph Hellwig int fh_len, int fh_type) 14831b961ac0SChristoph Hellwig { 14841b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14851b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1486ac27a0ecSDave Kleikamp } 1487ac27a0ecSDave Kleikamp 1488fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1489fde87268STheodore Ts'o { 1490fde87268STheodore Ts'o struct writeback_control wbc = { 1491fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1492fde87268STheodore Ts'o }; 1493fde87268STheodore Ts'o 1494fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1495fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1496fde87268STheodore Ts'o } 1497fde87268STheodore Ts'o 1498ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1499d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1500689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1501ac27a0ecSDave Kleikamp 1502617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1503617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1504617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1505617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1506617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15076f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15088c54ca9cSAl Viro const struct path *path); 1509617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1510ac27a0ecSDave Kleikamp size_t len, loff_t off); 1511617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1512ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15137c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15147c319d32SAditya Kali unsigned int flags); 1515ac27a0ecSDave Kleikamp 151696c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 151796c7e0d9SJan Kara { 151896c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 151996c7e0d9SJan Kara } 152096c7e0d9SJan Kara 152161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 152260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1523617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1524617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1525617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1526617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1527a5b5ee32SJan Kara .write_info = ext4_write_info, 1528a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1529a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1530040cb378SLi Xi .get_projid = ext4_get_projid, 15317a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1532ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1533ac27a0ecSDave Kleikamp }; 1534ac27a0ecSDave Kleikamp 15350d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1536617ba13bSMingming Cao .quota_on = ext4_quota_on, 1537ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1538287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 15390a240339SJan Kara .get_state = dquot_get_state, 1540287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1541287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 15426332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 15436332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1544ac27a0ecSDave Kleikamp }; 1545ac27a0ecSDave Kleikamp #endif 1546ac27a0ecSDave Kleikamp 1547ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1548617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 154994053139SAl Viro .free_inode = ext4_free_in_core_inode, 1550617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1551617ba13bSMingming Cao .write_inode = ext4_write_inode, 1552617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 15537ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 15540930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1555617ba13bSMingming Cao .put_super = ext4_put_super, 1556617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1557c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1558c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1559617ba13bSMingming Cao .statfs = ext4_statfs, 1560617ba13bSMingming Cao .show_options = ext4_show_options, 1561ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1562617ba13bSMingming Cao .quota_read = ext4_quota_read, 1563617ba13bSMingming Cao .quota_write = ext4_quota_write, 156496c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1565ac27a0ecSDave Kleikamp #endif 1566ac27a0ecSDave Kleikamp }; 1567ac27a0ecSDave Kleikamp 156839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 15691b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 15701b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1571617ba13bSMingming Cao .get_parent = ext4_get_parent, 1572fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1573ac27a0ecSDave Kleikamp }; 1574ac27a0ecSDave Kleikamp 1575ac27a0ecSDave Kleikamp enum { 1576ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1577ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 157872578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 15792d544ec9SYang Xu Opt_user_xattr, Opt_acl, 158072578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1581ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1582ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1583ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 15846ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 15854f74d15fSEric Biggers Opt_inlinecrypt, 1586ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1587ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1588*1ff20307SJeff Layton Opt_usrquota, Opt_grpquota, Opt_prjquota, 15899cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1590327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 15914437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 15921449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 15935328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1594744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1595fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1596cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 159721175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1598e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 15998016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 160099c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16018016e29fSHarshad Shirwadkar #endif 1602ac27a0ecSDave Kleikamp }; 1603ac27a0ecSDave Kleikamp 1604e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1605ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1606ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1607ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1608e5a185c2SLukas Czerner {} 1609e5a185c2SLukas Czerner }; 1610e5a185c2SLukas Czerner 1611e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1612ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1613ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1614ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1615e5a185c2SLukas Czerner {} 1616e5a185c2SLukas Czerner }; 1617e5a185c2SLukas Czerner 1618e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1619e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1620e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1621e5a185c2SLukas Czerner {} 1622e5a185c2SLukas Czerner }; 1623e5a185c2SLukas Czerner 1624e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1625ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1626ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1627ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1628e5a185c2SLukas Czerner {} 1629e5a185c2SLukas Czerner }; 1630e5a185c2SLukas Czerner 1631e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1632e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1633e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1634e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1635e5a185c2SLukas Czerner {} 1636e5a185c2SLukas Czerner }; 1637e5a185c2SLukas Czerner 1638e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1639e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1640e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1641e5a185c2SLukas Czerner 1642e5a185c2SLukas Czerner /* 1643e5a185c2SLukas Czerner * Mount option specification 1644e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1645e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1646e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1647e5a185c2SLukas Czerner * separate for now. 1648e5a185c2SLukas Czerner */ 1649e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1650e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1651e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1652e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1653e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1654e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1655e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1656e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1657e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1658e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1659e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1660e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1661e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1662e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1663e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1664e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1665e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1666e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1667e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1668e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1669e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1670e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1671e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1672e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1673e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1674e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1675e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1676e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1677e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1678e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1679e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1680e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1681e5a185c2SLukas Czerner ext4_param_data_err), 1682e5a185c2SLukas Czerner fsparam_string_empty 1683e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1684e5a185c2SLukas Czerner fsparam_string_empty 1685e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1686e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1687e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1688e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1689e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1690e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1691e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1692e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1693e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1694e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1695*1ff20307SJeff Layton fsparam_flag ("i_version", Opt_removed), 1696e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1697e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1698e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1699e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1700e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1701e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1702e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1703e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1704e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1705e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1706e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1707e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1708e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1709e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1710e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1711e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1712e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1713e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1714e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1715e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1716e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1717e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1718e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1719e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1720e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1721e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1722e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1723e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1724e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1725e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1726e5a185c2SLukas Czerner #endif 1727e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1728e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1729e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1730e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1731e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1732e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1733e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1734e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1735e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1736e5a185c2SLukas Czerner Opt_removed), 1737e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1738e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1739e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1740e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1741e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1742e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1743e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1744e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1745e5a185c2SLukas Czerner {} 1746e5a185c2SLukas Czerner }; 1747e5a185c2SLukas Czerner 1748b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1749196e402aSHarshad Shirwadkar 1750d6006186SEric Biggers static const char deprecated_msg[] = 1751d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1752437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1753b3881f74STheodore Ts'o 175426092bf5STheodore Ts'o #define MOPT_SET 0x0001 175526092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 175626092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 175726092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 175826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 175926092bf5STheodore Ts'o #define MOPT_Q 0 1760ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 176126092bf5STheodore Ts'o #else 176226092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 176326092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 176426092bf5STheodore Ts'o #endif 1765ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1766ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 17678dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1768ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1769ba2e524dSLukas Czerner #define MOPT_2 0x0100 177026092bf5STheodore Ts'o 177126092bf5STheodore Ts'o static const struct mount_opts { 177226092bf5STheodore Ts'o int token; 177326092bf5STheodore Ts'o int mount_opt; 177426092bf5STheodore Ts'o int flags; 177526092bf5STheodore Ts'o } ext4_mount_opts[] = { 177626092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 177726092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 177826092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 177926092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 178026092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 178126092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 17828dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 17838dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 17848dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 17858dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 178626092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 178726092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 17888dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 17898dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17908dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 179159d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1792327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1793327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1794cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1795c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1796c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 17978dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 17981e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 179926092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 18008dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 18011e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18028dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1803ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 180426092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 180526092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 180626092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 180726092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 180826092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1809ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1810ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1811ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1812ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1813ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 181426092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 181526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 181626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 181726092bf5STheodore Ts'o #else 181826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 181926092bf5STheodore Ts'o #endif 182026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 182126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 182226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 182326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 182426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 182526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 182626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 182749da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 182849da9392SJan Kara MOPT_SET | MOPT_Q}, 182926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 183049da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 183149da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1832ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1833ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1834ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1835cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 183621175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 18373d392b26STheodore Ts'o MOPT_SET}, 183899c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 18390f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 18400f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 18418016e29fSHarshad Shirwadkar #endif 184226092bf5STheodore Ts'o {Opt_err, 0, 0} 184326092bf5STheodore Ts'o }; 184426092bf5STheodore Ts'o 18455298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1846c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1847c83ad55eSGabriel Krisman Bertazi __u16 magic; 1848c83ad55eSGabriel Krisman Bertazi char *name; 184949bd03ccSChristoph Hellwig unsigned int version; 1850c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 185149bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1852c83ad55eSGabriel Krisman Bertazi }; 1853c83ad55eSGabriel Krisman Bertazi 1854aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1855aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1856c83ad55eSGabriel Krisman Bertazi { 1857c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1858c83ad55eSGabriel Krisman Bertazi int i; 1859c83ad55eSGabriel Krisman Bertazi 1860c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1861c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1862aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1863c83ad55eSGabriel Krisman Bertazi 1864aa8bf298SChristoph Hellwig return NULL; 1865c83ad55eSGabriel Krisman Bertazi } 1866c83ad55eSGabriel Krisman Bertazi #endif 1867c83ad55eSGabriel Krisman Bertazi 18686e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 18696e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 18706e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 18716e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 18726e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 18736e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 18746e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 18756e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 18766e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 18776e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 18786e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 18796e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 18806e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 18816e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 18826e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 18836e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 18846e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 18857edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 188627b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 18876e47a3ccSLukas Czerner 1888461c3af0SLukas Czerner struct ext4_fs_context { 1889e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 189085456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1891e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 18926e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 18936e47a3ccSLukas Czerner int s_fc_debug_max_replay; 18946e47a3ccSLukas Czerner #endif 18956e47a3ccSLukas Czerner unsigned short qname_spec; 18966e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 18976e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 18986e47a3ccSLukas Czerner unsigned long journal_devnum; 18996e47a3ccSLukas Czerner unsigned long s_commit_interval; 19006e47a3ccSLukas Czerner unsigned long s_stripe; 19016e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 19026e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 19036e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 19046e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 19056e47a3ccSLukas Czerner unsigned int journal_ioprio; 19066e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19076e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19086e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19096e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1910e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 1911e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 1912b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19136e47a3ccSLukas Czerner unsigned int spec; 19146e47a3ccSLukas Czerner u32 s_max_batch_time; 19156e47a3ccSLukas Czerner u32 s_min_batch_time; 19166e47a3ccSLukas Czerner kuid_t s_resuid; 19176e47a3ccSLukas Czerner kgid_t s_resgid; 19187edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1919b237e304SHarshad Shirwadkar }; 1920b237e304SHarshad Shirwadkar 1921cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1922cebe85d5SLukas Czerner { 1923cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1924cebe85d5SLukas Czerner int i; 1925cebe85d5SLukas Czerner 1926cebe85d5SLukas Czerner if (!ctx) 1927cebe85d5SLukas Czerner return; 1928cebe85d5SLukas Czerner 1929cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 1930cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 1931cebe85d5SLukas Czerner 193285456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 1933cebe85d5SLukas Czerner kfree(ctx); 1934cebe85d5SLukas Czerner } 1935cebe85d5SLukas Czerner 1936cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 1937cebe85d5SLukas Czerner { 1938da9e4802SDan Carpenter struct ext4_fs_context *ctx; 1939cebe85d5SLukas Czerner 1940cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 1941cebe85d5SLukas Czerner if (!ctx) 1942cebe85d5SLukas Czerner return -ENOMEM; 1943cebe85d5SLukas Czerner 1944cebe85d5SLukas Czerner fc->fs_private = ctx; 1945cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 1946cebe85d5SLukas Czerner 1947cebe85d5SLukas Czerner return 0; 1948cebe85d5SLukas Czerner } 1949cebe85d5SLukas Czerner 1950e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 1951e6e268cbSLukas Czerner /* 1952e6e268cbSLukas Czerner * Note the name of the specified quota file. 1953e6e268cbSLukas Czerner */ 1954e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 1955e6e268cbSLukas Czerner struct fs_parameter *param) 1956e6e268cbSLukas Czerner { 1957e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1958e6e268cbSLukas Czerner char *qname; 1959e6e268cbSLukas Czerner 1960e6e268cbSLukas Czerner if (param->size < 1) { 1961e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 1962e6e268cbSLukas Czerner return -EINVAL; 1963e6e268cbSLukas Czerner } 1964e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 1965e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1966e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 1967e6e268cbSLukas Czerner return -EINVAL; 1968e6e268cbSLukas Czerner } 1969e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 1970e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 1971e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1972e6e268cbSLukas Czerner "%s quota file already specified", 1973e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 1974e6e268cbSLukas Czerner return -EINVAL; 1975e6e268cbSLukas Czerner } 1976e6e268cbSLukas Czerner return 0; 1977e6e268cbSLukas Czerner } 1978e6e268cbSLukas Czerner 1979e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 1980e6e268cbSLukas Czerner if (!qname) { 1981e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1982e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 1983e6e268cbSLukas Czerner return -ENOMEM; 1984e6e268cbSLukas Czerner } 1985e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 1986e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 19876e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 1988e6e268cbSLukas Czerner return 0; 1989e6e268cbSLukas Czerner } 1990e6e268cbSLukas Czerner 1991e6e268cbSLukas Czerner /* 1992e6e268cbSLukas Czerner * Clear the name of the specified quota file. 1993e6e268cbSLukas Czerner */ 1994e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 1995e6e268cbSLukas Czerner { 1996e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1997e6e268cbSLukas Czerner 1998e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 1999e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2000e6e268cbSLukas Czerner 2001e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2002e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20036e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2004e6e268cbSLukas Czerner return 0; 2005e6e268cbSLukas Czerner } 2006e6e268cbSLukas Czerner #endif 2007e6e268cbSLukas Czerner 200885456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 200985456054SEric Biggers struct ext4_fs_context *ctx) 201085456054SEric Biggers { 201185456054SEric Biggers int err; 201285456054SEric Biggers 201385456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 201485456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 201585456054SEric Biggers "test_dummy_encryption option not supported"); 201685456054SEric Biggers return -EINVAL; 201785456054SEric Biggers } 201885456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 201985456054SEric Biggers &ctx->dummy_enc_policy); 202085456054SEric Biggers if (err == -EINVAL) { 202185456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 202285456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 202385456054SEric Biggers } else if (err == -EEXIST) { 202485456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 202585456054SEric Biggers "Conflicting test_dummy_encryption options"); 202685456054SEric Biggers return -EINVAL; 202785456054SEric Biggers } 202885456054SEric Biggers return err; 202985456054SEric Biggers } 203085456054SEric Biggers 20316e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 20324c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 20334c246728SLukas Czerner unsigned long flag) \ 20346e47a3ccSLukas Czerner { \ 20356e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20366e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2037e3952fccSLukas Czerner } 2038e3952fccSLukas Czerner 2039e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 20404c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 20414c246728SLukas Czerner unsigned long flag) \ 20426e47a3ccSLukas Czerner { \ 20436e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20446e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2045e3952fccSLukas Czerner } 2046e3952fccSLukas Czerner 2047e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 20484c246728SLukas Czerner static inline unsigned long \ 20494c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 20506e47a3ccSLukas Czerner { \ 20514c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2052e3952fccSLukas Czerner } 20536e47a3ccSLukas Czerner 2054e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 20556e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2056e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2057e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 20586e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2059e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2060e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2061e3952fccSLukas Czerner 2062e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2063e3952fccSLukas Czerner { 2064e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2065e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2066e3952fccSLukas Czerner } 20676e47a3ccSLukas Czerner 206802f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 206926092bf5STheodore Ts'o { 2070461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2071461c3af0SLukas Czerner struct fs_parse_result result; 207226092bf5STheodore Ts'o const struct mount_opts *m; 2073461c3af0SLukas Czerner int is_remount; 207408cefc7aSEric W. Biederman kuid_t uid; 207508cefc7aSEric W. Biederman kgid_t gid; 2076461c3af0SLukas Czerner int token; 2077461c3af0SLukas Czerner 2078461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2079461c3af0SLukas Czerner if (token < 0) 2080461c3af0SLukas Czerner return token; 2081461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 208226092bf5STheodore Ts'o 2083ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2084ba2e524dSLukas Czerner if (token == m->token) 2085ba2e524dSLukas Czerner break; 2086ba2e524dSLukas Czerner 2087ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2088ba2e524dSLukas Czerner 2089ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2090ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2091ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2092ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2093ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2094ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2095ba2e524dSLukas Czerner } else 2096ba2e524dSLukas Czerner return -EINVAL; 2097ba2e524dSLukas Czerner } 2098ba2e524dSLukas Czerner 2099ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2100ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2101ba2e524dSLukas Czerner param->key); 2102ba2e524dSLukas Czerner return 0; 2103ba2e524dSLukas Czerner } 2104ba2e524dSLukas Czerner 2105ba2e524dSLukas Czerner switch (token) { 210657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2107ba2e524dSLukas Czerner case Opt_usrjquota: 2108461c3af0SLukas Czerner if (!*param->string) 2109e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2110461c3af0SLukas Czerner else 2111e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2112ba2e524dSLukas Czerner case Opt_grpjquota: 2113461c3af0SLukas Czerner if (!*param->string) 2114e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2115461c3af0SLukas Czerner else 2116e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 211757f73c2cSTheodore Ts'o #endif 211826092bf5STheodore Ts'o case Opt_sb: 21197edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21207edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21217edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21227edfd85bSLukas Czerner } else { 21237edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21247edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21257edfd85bSLukas Czerner } 212602f960f8SLukas Czerner return 0; 212726092bf5STheodore Ts'o case Opt_removed: 2128da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2129461c3af0SLukas Czerner param->key); 213002f960f8SLukas Czerner return 0; 213126092bf5STheodore Ts'o case Opt_abort: 2132e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 213302f960f8SLukas Czerner return 0; 21344f74d15fSEric Biggers case Opt_inlinecrypt: 21354f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21366e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 21374f74d15fSEric Biggers #else 2138da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 21394f74d15fSEric Biggers #endif 214002f960f8SLukas Czerner return 0; 2141461c3af0SLukas Czerner case Opt_errors: 21426e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2143ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2144ba2e524dSLukas Czerner return 0; 2145ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2146ba2e524dSLukas Czerner case Opt_jqfmt: 2147ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2148ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2149ba2e524dSLukas Czerner return 0; 2150ba2e524dSLukas Czerner #endif 2151ba2e524dSLukas Czerner case Opt_data: 2152ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2153ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2154ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2155ba2e524dSLukas Czerner return 0; 2156ba2e524dSLukas Czerner case Opt_commit: 2157461c3af0SLukas Czerner if (result.uint_32 == 0) 21586e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2159461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2160da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 21619ba55543Szhangyi (F) "Invalid commit interval %d, " 21629ba55543Szhangyi (F) "must be smaller than %d", 2163461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2164da812f61SLukas Czerner return -EINVAL; 21659ba55543Szhangyi (F) } 21666e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 21676e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2168ba2e524dSLukas Czerner return 0; 2169ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 21706e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2171da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2172461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2173da812f61SLukas Czerner return -EINVAL; 21749803387cSTheodore Ts'o } 21756e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 21766e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2177ba2e524dSLukas Czerner return 0; 2178ba2e524dSLukas Czerner case Opt_max_batch_time: 21796e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 21806e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2181ba2e524dSLukas Czerner return 0; 2182ba2e524dSLukas Czerner case Opt_min_batch_time: 21836e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 21846e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2185ba2e524dSLukas Czerner return 0; 2186ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2187461c3af0SLukas Czerner if (result.uint_32 && 2188461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2189461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2190da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2191e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2192e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2193da812f61SLukas Czerner return -EINVAL; 219426092bf5STheodore Ts'o } 21956e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 21966e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2197ba2e524dSLukas Czerner return 0; 2198ba2e524dSLukas Czerner case Opt_init_itable: 21996e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 22006e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2201461c3af0SLukas Czerner if (param->type == fs_value_is_string) 22026e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 22036e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2204ba2e524dSLukas Czerner return 0; 2205ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22066e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22076e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2208ba2e524dSLukas Czerner return 0; 22098016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2210ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22116e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22126e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2213ba2e524dSLukas Czerner return 0; 22148016e29fSHarshad Shirwadkar #endif 2215ba2e524dSLukas Czerner case Opt_stripe: 22166e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22176e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2218ba2e524dSLukas Czerner return 0; 2219ba2e524dSLukas Czerner case Opt_resuid: 2220461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22210efb3b23SJan Kara if (!uid_valid(uid)) { 2222da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2223461c3af0SLukas Czerner result.uint_32); 2224da812f61SLukas Czerner return -EINVAL; 22250efb3b23SJan Kara } 22266e47a3ccSLukas Czerner ctx->s_resuid = uid; 22276e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2228ba2e524dSLukas Czerner return 0; 2229ba2e524dSLukas Czerner case Opt_resgid: 2230461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22310efb3b23SJan Kara if (!gid_valid(gid)) { 2232da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2233461c3af0SLukas Czerner result.uint_32); 2234da812f61SLukas Czerner return -EINVAL; 22350efb3b23SJan Kara } 22366e47a3ccSLukas Czerner ctx->s_resgid = gid; 22376e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2238ba2e524dSLukas Czerner return 0; 2239ba2e524dSLukas Czerner case Opt_journal_dev: 22400efb3b23SJan Kara if (is_remount) { 2241da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22420efb3b23SJan Kara "Cannot specify journal on remount"); 2243da812f61SLukas Czerner return -EINVAL; 22440efb3b23SJan Kara } 2245461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 22466e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2247ba2e524dSLukas Czerner return 0; 2248ba2e524dSLukas Czerner case Opt_journal_path: 2249ba2e524dSLukas Czerner { 2250ad4eec61SEric Sandeen struct inode *journal_inode; 2251ad4eec61SEric Sandeen struct path path; 2252ad4eec61SEric Sandeen int error; 2253ad4eec61SEric Sandeen 2254ad4eec61SEric Sandeen if (is_remount) { 2255da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2256ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2257da812f61SLukas Czerner return -EINVAL; 2258ad4eec61SEric Sandeen } 2259ad4eec61SEric Sandeen 2260461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2261ad4eec61SEric Sandeen if (error) { 2262da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2263461c3af0SLukas Czerner "journal device path"); 2264da812f61SLukas Czerner return -EINVAL; 2265ad4eec61SEric Sandeen } 2266ad4eec61SEric Sandeen 22672b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2268461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 22696e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2270ad4eec61SEric Sandeen path_put(&path); 2271ba2e524dSLukas Czerner return 0; 2272ba2e524dSLukas Czerner } 2273ba2e524dSLukas Czerner case Opt_journal_ioprio: 2274461c3af0SLukas Czerner if (result.uint_32 > 7) { 2275da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 22760efb3b23SJan Kara " (must be 0-7)"); 2277da812f61SLukas Czerner return -EINVAL; 22780efb3b23SJan Kara } 2279461c3af0SLukas Czerner ctx->journal_ioprio = 2280461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 22816e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2282ba2e524dSLukas Czerner return 0; 2283ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 228485456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2285ba2e524dSLukas Czerner case Opt_dax: 2286ba2e524dSLukas Czerner case Opt_dax_type: 2287ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2288ba2e524dSLukas Czerner { 2289ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2290ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2291ba2e524dSLukas Czerner 2292ba2e524dSLukas Czerner switch (type) { 22939cb20f94SIra Weiny case Opt_dax: 22949cb20f94SIra Weiny case Opt_dax_always: 2295ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 22966e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 22979cb20f94SIra Weiny break; 22989cb20f94SIra Weiny case Opt_dax_never: 2299ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23006e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23019cb20f94SIra Weiny break; 23029cb20f94SIra Weiny case Opt_dax_inode: 23036e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23046e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23059cb20f94SIra Weiny /* Strictly for printing options */ 2306ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23079cb20f94SIra Weiny break; 23089cb20f94SIra Weiny } 2309ba2e524dSLukas Czerner return 0; 2310ba2e524dSLukas Czerner } 2311ef83b6e8SDan Williams #else 2312da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2313da812f61SLukas Czerner return -EINVAL; 2314923ae0ffSRoss Zwisler #endif 2315ba2e524dSLukas Czerner case Opt_data_err: 2316ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23176e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2318ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23196e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2320ba2e524dSLukas Czerner return 0; 2321ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 232227b38686SOjaswin Mujoo if (result.int_32 == 1) { 232327b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 232427b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 232527b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 232627b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 232727b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 232827b38686SOjaswin Mujoo } else { 2329da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2330196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2331da812f61SLukas Czerner return -EINVAL; 2332196e402aSHarshad Shirwadkar } 2333ba2e524dSLukas Czerner return 0; 2334ba2e524dSLukas Czerner } 2335ba2e524dSLukas Czerner 2336ba2e524dSLukas Czerner /* 2337ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2338ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2339ba2e524dSLukas Czerner */ 2340ba2e524dSLukas Czerner if (m->token == Opt_err) { 2341ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2342ba2e524dSLukas Czerner param->key); 2343ba2e524dSLukas Czerner WARN_ON(1); 2344ba2e524dSLukas Czerner return -EINVAL; 2345ba2e524dSLukas Czerner } 2346ba2e524dSLukas Czerner 2347ba2e524dSLukas Czerner else { 2348461c3af0SLukas Czerner unsigned int set = 0; 2349461c3af0SLukas Czerner 2350461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2351461c3af0SLukas Czerner result.uint_32 > 0) 2352461c3af0SLukas Czerner set = 1; 2353461c3af0SLukas Czerner 235426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2355461c3af0SLukas Czerner set = !set; 235626092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2357da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2358461c3af0SLukas Czerner "buggy handling of option %s", 2359461c3af0SLukas Czerner param->key); 236026092bf5STheodore Ts'o WARN_ON(1); 2361da812f61SLukas Czerner return -EINVAL; 236226092bf5STheodore Ts'o } 2363995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2364461c3af0SLukas Czerner if (set != 0) 23656e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2366995a3ed6SHarshad Shirwadkar else 23676e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2368995a3ed6SHarshad Shirwadkar } else { 2369461c3af0SLukas Czerner if (set != 0) 23706e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 237126092bf5STheodore Ts'o else 23726e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 237326092bf5STheodore Ts'o } 2374995a3ed6SHarshad Shirwadkar } 2375ba2e524dSLukas Czerner 237602f960f8SLukas Czerner return 0; 237726092bf5STheodore Ts'o } 237826092bf5STheodore Ts'o 23797edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2380ac27a0ecSDave Kleikamp { 2381461c3af0SLukas Czerner struct fs_parameter param; 2382461c3af0SLukas Czerner int ret; 2383461c3af0SLukas Czerner char *key; 2384ac27a0ecSDave Kleikamp 2385ac27a0ecSDave Kleikamp if (!options) 23867edfd85bSLukas Czerner return 0; 2387461c3af0SLukas Czerner 2388461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2389461c3af0SLukas Czerner if (*key) { 2390461c3af0SLukas Czerner size_t v_len = 0; 2391461c3af0SLukas Czerner char *value = strchr(key, '='); 2392461c3af0SLukas Czerner 2393461c3af0SLukas Czerner param.type = fs_value_is_flag; 2394461c3af0SLukas Czerner param.string = NULL; 2395461c3af0SLukas Czerner 2396461c3af0SLukas Czerner if (value) { 2397461c3af0SLukas Czerner if (value == key) 2398ac27a0ecSDave Kleikamp continue; 2399461c3af0SLukas Czerner 2400461c3af0SLukas Czerner *value++ = 0; 2401461c3af0SLukas Czerner v_len = strlen(value); 2402461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2403461c3af0SLukas Czerner GFP_KERNEL); 2404461c3af0SLukas Czerner if (!param.string) 24057edfd85bSLukas Czerner return -ENOMEM; 2406461c3af0SLukas Czerner param.type = fs_value_is_string; 2407461c3af0SLukas Czerner } 2408461c3af0SLukas Czerner 2409461c3af0SLukas Czerner param.key = key; 2410461c3af0SLukas Czerner param.size = v_len; 2411461c3af0SLukas Czerner 241202f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2413461c3af0SLukas Czerner if (param.string) 2414461c3af0SLukas Czerner kfree(param.string); 2415461c3af0SLukas Czerner if (ret < 0) 24167edfd85bSLukas Czerner return ret; 2417ac27a0ecSDave Kleikamp } 2418461c3af0SLukas Czerner } 2419461c3af0SLukas Czerner 24207edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2421da812f61SLukas Czerner if (ret < 0) 24227edfd85bSLukas Czerner return ret; 24237edfd85bSLukas Czerner 24247edfd85bSLukas Czerner return 0; 24257edfd85bSLukas Czerner } 24267edfd85bSLukas Czerner 24277edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24287edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24297edfd85bSLukas Czerner { 24307edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24317edfd85bSLukas Czerner char *s_mount_opts = NULL; 24327edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 24337edfd85bSLukas Czerner struct fs_context *fc = NULL; 24347edfd85bSLukas Czerner int ret = -ENOMEM; 24357edfd85bSLukas Czerner 24367edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2437da812f61SLukas Czerner return 0; 2438da812f61SLukas Czerner 24397edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 24407edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 24417edfd85bSLukas Czerner GFP_KERNEL); 24427edfd85bSLukas Czerner if (!s_mount_opts) 24437edfd85bSLukas Czerner return ret; 2444e6e268cbSLukas Czerner 24457edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 24467edfd85bSLukas Czerner if (!fc) 24477edfd85bSLukas Czerner goto out_free; 2448e6e268cbSLukas Czerner 24497edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 24507edfd85bSLukas Czerner if (!s_ctx) 24517edfd85bSLukas Czerner goto out_free; 24527edfd85bSLukas Czerner 24537edfd85bSLukas Czerner fc->fs_private = s_ctx; 24547edfd85bSLukas Czerner fc->s_fs_info = sbi; 24557edfd85bSLukas Czerner 24567edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 24577edfd85bSLukas Czerner if (ret < 0) 24587edfd85bSLukas Czerner goto parse_failed; 24597edfd85bSLukas Czerner 24607edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 24617edfd85bSLukas Czerner if (ret < 0) { 24627edfd85bSLukas Czerner parse_failed: 24637edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 24647edfd85bSLukas Czerner "failed to parse options in superblock: %s", 24657edfd85bSLukas Czerner s_mount_opts); 24667edfd85bSLukas Czerner ret = 0; 24677edfd85bSLukas Czerner goto out_free; 24687edfd85bSLukas Czerner } 24697edfd85bSLukas Czerner 24707edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 24717edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 24727edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 24737edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 24747edfd85bSLukas Czerner 247585456054SEric Biggers ext4_apply_options(fc, sb); 247685456054SEric Biggers ret = 0; 24777edfd85bSLukas Czerner 24787edfd85bSLukas Czerner out_free: 2479c069db76SEric Biggers if (fc) { 2480c069db76SEric Biggers ext4_fc_free(fc); 24817edfd85bSLukas Czerner kfree(fc); 2482c069db76SEric Biggers } 24837edfd85bSLukas Czerner kfree(s_mount_opts); 24847edfd85bSLukas Czerner return ret; 24854c94bff9SLukas Czerner } 24864c94bff9SLukas Czerner 2487e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2488e6e268cbSLukas Czerner struct super_block *sb) 2489e6e268cbSLukas Czerner { 2490e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 24916e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2492e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2493e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2494e6e268cbSLukas Czerner char *qname; 2495e6e268cbSLukas Czerner int i; 2496e6e268cbSLukas Czerner 24976e47a3ccSLukas Czerner if (quota_feature) 24986e47a3ccSLukas Czerner return; 24996e47a3ccSLukas Czerner 25006e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2501e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2502e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2503e6e268cbSLukas Czerner continue; 25046e47a3ccSLukas Czerner 2505e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25064c1bd5a9SLukas Czerner if (qname) 25074c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2508e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 250913b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 251013b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 251113b215a9SLukas Czerner if (qname) 251213b215a9SLukas Czerner kfree_rcu(qname); 2513e6e268cbSLukas Czerner } 25146e47a3ccSLukas Czerner } 25156e47a3ccSLukas Czerner 25166e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25176e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2518e6e268cbSLukas Czerner #endif 2519e6e268cbSLukas Czerner } 2520e6e268cbSLukas Czerner 2521e6e268cbSLukas Czerner /* 2522e6e268cbSLukas Czerner * Check quota settings consistency. 2523e6e268cbSLukas Czerner */ 2524e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2525e6e268cbSLukas Czerner struct super_block *sb) 2526e6e268cbSLukas Czerner { 2527e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2528e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2529e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2530e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2531e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25326e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 25336e47a3ccSLukas Czerner int quota_flags, i; 2534e6e268cbSLukas Czerner 25356e47a3ccSLukas Czerner /* 25366e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 25376e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 25386e47a3ccSLukas Czerner * to support legacy quotas in quota files. 25396e47a3ccSLukas Czerner */ 25406e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 25416e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 25426e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 25436e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 25446e47a3ccSLukas Czerner return -EINVAL; 25456e47a3ccSLukas Czerner } 25466e47a3ccSLukas Czerner 25476e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 25486e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 25496e47a3ccSLukas Czerner if (quota_loaded && 25506e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 25516e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 25526e47a3ccSLukas Czerner goto err_quota_change; 25536e47a3ccSLukas Czerner 25546e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2555e6e268cbSLukas Czerner 2556e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2557e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2558e6e268cbSLukas Czerner continue; 2559e6e268cbSLukas Czerner 25606e47a3ccSLukas Czerner if (quota_loaded && 25616e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2562e6e268cbSLukas Czerner goto err_jquota_change; 2563e6e268cbSLukas Czerner 2564e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 256513b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2566e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2567e6e268cbSLukas Czerner goto err_jquota_specified; 2568e6e268cbSLukas Czerner } 25696e47a3ccSLukas Czerner 25706e47a3ccSLukas Czerner if (quota_feature) { 25716e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 25726e47a3ccSLukas Czerner "Journaled quota options ignored when " 25736e47a3ccSLukas Czerner "QUOTA feature is enabled"); 25746e47a3ccSLukas Czerner return 0; 25756e47a3ccSLukas Czerner } 2576e6e268cbSLukas Czerner } 2577e6e268cbSLukas Czerner 25786e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2579e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 25806e47a3ccSLukas Czerner goto err_jquota_change; 2581e6e268cbSLukas Czerner if (quota_feature) { 2582e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2583e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2584e6e268cbSLukas Czerner return 0; 2585e6e268cbSLukas Czerner } 2586e6e268cbSLukas Czerner } 25876e47a3ccSLukas Czerner 25886e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 25896e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 25906e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 25916e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 25926e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 25936e47a3ccSLukas Czerner 25946e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 25956e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 25966e47a3ccSLukas Czerner 25976e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 25986e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 25996e47a3ccSLukas Czerner 26006e47a3ccSLukas Czerner if (usr_qf_name) { 26016e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 26026e47a3ccSLukas Czerner usrquota = false; 26036e47a3ccSLukas Czerner } 26046e47a3ccSLukas Czerner if (grp_qf_name) { 26056e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26066e47a3ccSLukas Czerner grpquota = false; 26076e47a3ccSLukas Czerner } 26086e47a3ccSLukas Czerner 26096e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26106e47a3ccSLukas Czerner if (usrquota || grpquota) { 26116e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26126e47a3ccSLukas Czerner "format mixing"); 26136e47a3ccSLukas Czerner return -EINVAL; 26146e47a3ccSLukas Czerner } 26156e47a3ccSLukas Czerner 26166e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26176e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26186e47a3ccSLukas Czerner "not specified"); 26196e47a3ccSLukas Czerner return -EINVAL; 26206e47a3ccSLukas Czerner } 26216e47a3ccSLukas Czerner } 26226e47a3ccSLukas Czerner 2623e6e268cbSLukas Czerner return 0; 2624e6e268cbSLukas Czerner 2625e6e268cbSLukas Czerner err_quota_change: 2626e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2627e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2628e6e268cbSLukas Czerner return -EINVAL; 2629e6e268cbSLukas Czerner err_jquota_change: 2630e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2631e6e268cbSLukas Czerner "options when quota turned on"); 2632e6e268cbSLukas Czerner return -EINVAL; 2633e6e268cbSLukas Czerner err_jquota_specified: 2634e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2635e6e268cbSLukas Czerner QTYPE2NAME(i)); 2636e6e268cbSLukas Czerner return -EINVAL; 2637e6e268cbSLukas Czerner #else 2638e6e268cbSLukas Czerner return 0; 2639e6e268cbSLukas Czerner #endif 2640e6e268cbSLukas Czerner } 2641e6e268cbSLukas Czerner 26425f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 26435f41fdaeSEric Biggers struct super_block *sb) 26445f41fdaeSEric Biggers { 26455f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 26465f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 264785456054SEric Biggers int err; 26485f41fdaeSEric Biggers 264985456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 26505f41fdaeSEric Biggers return 0; 26515f41fdaeSEric Biggers 26525f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 26535f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 26545f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 26555f41fdaeSEric Biggers return -EINVAL; 26565f41fdaeSEric Biggers } 26575f41fdaeSEric Biggers /* 26585f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 26595f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 26605f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 26615f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 26625f41fdaeSEric Biggers */ 266385456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 266485456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 266585456054SEric Biggers &ctx->dummy_enc_policy)) 266685456054SEric Biggers return 0; 26675f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 266885456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 26695f41fdaeSEric Biggers return -EINVAL; 26705f41fdaeSEric Biggers } 267185456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 267285456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 267385456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 267485456054SEric Biggers &ctx->dummy_enc_policy)) 26755f41fdaeSEric Biggers return 0; 267685456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 267785456054SEric Biggers "Conflicting test_dummy_encryption options"); 267885456054SEric Biggers return -EINVAL; 267985456054SEric Biggers } 268085456054SEric Biggers /* 268185456054SEric Biggers * fscrypt_add_test_dummy_key() technically changes the super_block, so 268285456054SEric Biggers * technically it should be delayed until ext4_apply_options() like the 268385456054SEric Biggers * other changes. But since we never get here for remounts (see above), 268485456054SEric Biggers * and this is the last chance to report errors, we do it here. 268585456054SEric Biggers */ 268685456054SEric Biggers err = fscrypt_add_test_dummy_key(sb, &ctx->dummy_enc_policy); 268785456054SEric Biggers if (err) 268885456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 268985456054SEric Biggers "Error adding test dummy encryption key [%d]", err); 269085456054SEric Biggers return err; 269185456054SEric Biggers } 269285456054SEric Biggers 269385456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 269485456054SEric Biggers struct super_block *sb) 269585456054SEric Biggers { 269685456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 269785456054SEric Biggers /* if already set, it was already verified to be the same */ 269885456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 269985456054SEric Biggers return; 270085456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 270185456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 270285456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 27035f41fdaeSEric Biggers } 27045f41fdaeSEric Biggers 2705b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2706b6bd2435SLukas Czerner struct super_block *sb) 2707b6bd2435SLukas Czerner { 2708b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27096e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27106e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27115f41fdaeSEric Biggers int err; 2712b6bd2435SLukas Czerner 2713b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2714b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2715b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2716b6bd2435SLukas Czerner return -EINVAL; 2717b6bd2435SLukas Czerner } 2718b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2719b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2720b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2721b6bd2435SLukas Czerner return -EINVAL; 2722b6bd2435SLukas Czerner } 2723b6bd2435SLukas Czerner 27246e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27256e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27266e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27276e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27286e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27296e47a3ccSLukas Czerner return -EINVAL; 27306e47a3ccSLukas Czerner } 27316e47a3ccSLukas Czerner 27326e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 27336e47a3ccSLukas Czerner int blocksize = 27346e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 27356e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 27366e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 27376e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 27386e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 27396e47a3ccSLukas Czerner } 27406e47a3ccSLukas Czerner 27415f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27425f41fdaeSEric Biggers if (err) 27435f41fdaeSEric Biggers return err; 27446e47a3ccSLukas Czerner 27456e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 27466e47a3ccSLukas Czerner if (!sbi->s_journal) { 27476e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 27486e47a3ccSLukas Czerner "Remounting file system with no journal " 27496e47a3ccSLukas Czerner "so ignoring journalled data option"); 27506e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 27514c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 27524c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 27536e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 27546e47a3ccSLukas Czerner "on remount"); 27556e47a3ccSLukas Czerner return -EINVAL; 27566e47a3ccSLukas Czerner } 27576e47a3ccSLukas Czerner } 27586e47a3ccSLukas Czerner 27596e47a3ccSLukas Czerner if (is_remount) { 27606e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27616e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 27626e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 27636e47a3ccSLukas Czerner "both data=journal and dax"); 27646e47a3ccSLukas Czerner return -EINVAL; 27656e47a3ccSLukas Czerner } 27666e47a3ccSLukas Czerner 27676e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27686e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27696e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 27706e47a3ccSLukas Czerner fail_dax_change_remount: 27716e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 27726e47a3ccSLukas Czerner "dax mount option while remounting"); 27736e47a3ccSLukas Czerner return -EINVAL; 27746e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 27756e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 27766e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 27776e47a3ccSLukas Czerner goto fail_dax_change_remount; 27786e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 27796e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27806e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 27816e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 27826e47a3ccSLukas Czerner goto fail_dax_change_remount; 27836e47a3ccSLukas Czerner } 27846e47a3ccSLukas Czerner } 27856e47a3ccSLukas Czerner 2786b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2787b6bd2435SLukas Czerner } 2788b6bd2435SLukas Czerner 278985456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 27906e47a3ccSLukas Czerner { 27916e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27926e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27936e47a3ccSLukas Czerner 27946e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 27956e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 27966e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 27976e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 27986e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 27996e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28006e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28016e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28026e47a3ccSLukas Czerner 28036e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28046e47a3ccSLukas Czerner APPLY(s_commit_interval); 28056e47a3ccSLukas Czerner APPLY(s_stripe); 28066e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28076e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28086e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28096e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28106e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28116e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28126e47a3ccSLukas Czerner APPLY(s_resgid); 28136e47a3ccSLukas Czerner APPLY(s_resuid); 28146e47a3ccSLukas Czerner 28156e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28166e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28176e47a3ccSLukas Czerner #endif 28186e47a3ccSLukas Czerner 28196e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 282085456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28216e47a3ccSLukas Czerner } 28226e47a3ccSLukas Czerner 28236e47a3ccSLukas Czerner 2824da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28254c94bff9SLukas Czerner { 2826ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28276e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28284c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28296e47a3ccSLukas Czerner 28306e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28316e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28326e47a3ccSLukas Czerner 283333458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28346e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28356e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2836ac27a0ecSDave Kleikamp 28376e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28386e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2839ac27a0ecSDave Kleikamp 28406e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28416e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2842da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2843b31e1552SEric Sandeen "format mixing"); 2844da812f61SLukas Czerner return -EINVAL; 2845ac27a0ecSDave Kleikamp } 2846ac27a0ecSDave Kleikamp } 2847ac27a0ecSDave Kleikamp #endif 28486e47a3ccSLukas Czerner return 1; 2849ac27a0ecSDave Kleikamp } 2850ac27a0ecSDave Kleikamp 28512adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 28522adf6da8STheodore Ts'o struct super_block *sb) 28532adf6da8STheodore Ts'o { 28542adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 28552adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 285633458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 28572adf6da8STheodore Ts'o 28582adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 28592adf6da8STheodore Ts'o char *fmtname = ""; 28602adf6da8STheodore Ts'o 28612adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 28622adf6da8STheodore Ts'o case QFMT_VFS_OLD: 28632adf6da8STheodore Ts'o fmtname = "vfsold"; 28642adf6da8STheodore Ts'o break; 28652adf6da8STheodore Ts'o case QFMT_VFS_V0: 28662adf6da8STheodore Ts'o fmtname = "vfsv0"; 28672adf6da8STheodore Ts'o break; 28682adf6da8STheodore Ts'o case QFMT_VFS_V1: 28692adf6da8STheodore Ts'o fmtname = "vfsv1"; 28702adf6da8STheodore Ts'o break; 28712adf6da8STheodore Ts'o } 28722adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 28732adf6da8STheodore Ts'o } 28742adf6da8STheodore Ts'o 287533458eabSTheodore Ts'o rcu_read_lock(); 287633458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 287733458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 287833458eabSTheodore Ts'o if (usr_qf_name) 287933458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 288033458eabSTheodore Ts'o if (grp_qf_name) 288133458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 288233458eabSTheodore Ts'o rcu_read_unlock(); 28832adf6da8STheodore Ts'o #endif 28842adf6da8STheodore Ts'o } 28852adf6da8STheodore Ts'o 28865a916be1STheodore Ts'o static const char *token2str(int token) 28875a916be1STheodore Ts'o { 288897d8a670SLukas Czerner const struct fs_parameter_spec *spec; 28895a916be1STheodore Ts'o 289097d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 289197d8a670SLukas Czerner if (spec->opt == token && !spec->type) 28925a916be1STheodore Ts'o break; 289397d8a670SLukas Czerner return spec->name; 28945a916be1STheodore Ts'o } 28955a916be1STheodore Ts'o 28962adf6da8STheodore Ts'o /* 28972adf6da8STheodore Ts'o * Show an option if 28982adf6da8STheodore Ts'o * - it's set to a non-default value OR 28992adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29002adf6da8STheodore Ts'o */ 290166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 290266acdcf4STheodore Ts'o int nodefs) 29032adf6da8STheodore Ts'o { 29042adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29052adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 290668afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 29075a916be1STheodore Ts'o const struct mount_opts *m; 290866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29092adf6da8STheodore Ts'o 291066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 291166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29122adf6da8STheodore Ts'o 29132adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29145a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29155a916be1STheodore Ts'o 29165a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29175a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 29185a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2919ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29205a916be1STheodore Ts'o continue; 292168afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 29225a916be1STheodore Ts'o continue; /* skip if same as the default */ 29235a916be1STheodore Ts'o if ((want_set && 29245a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 29255a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 29265a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 29275a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29285a916be1STheodore Ts'o } 29295a916be1STheodore Ts'o 293008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29315a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 293208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 293308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 293408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 29355a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 293608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 293708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 293866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 29395a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 29405a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 29412adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 29425a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 29432adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 29445a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 294566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 29465a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 294766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 29485a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 294966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 29505a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 295166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 29525a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 295368afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 295468afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 29552adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29565a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 29572adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29585a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 29592adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 29605a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 29615a916be1STheodore Ts'o } 296266acdcf4STheodore Ts'o if (nodefs || 296366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 29645a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 29652adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 29662adf6da8STheodore Ts'o 2967ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 296866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 29695a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2970df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2971df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 29727915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 29737915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2974ed318a6cSEric Biggers 2975ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 29762adf6da8STheodore Ts'o 29774f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 29784f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 29794f74d15fSEric Biggers 29809cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 29819cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 29829cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 29839cb20f94SIra Weiny else 29849cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 29859cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 29869cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 29879cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 29889cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 29899cb20f94SIra Weiny } 29903fa5d23eSOjaswin Mujoo 29913fa5d23eSOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 29923fa5d23eSOjaswin Mujoo !test_opt2(sb, MB_OPTIMIZE_SCAN)) { 29933fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=0"); 29943fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 29953fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 29963fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 29973fa5d23eSOjaswin Mujoo } 29983fa5d23eSOjaswin Mujoo 29992adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30002adf6da8STheodore Ts'o return 0; 30012adf6da8STheodore Ts'o } 30022adf6da8STheodore Ts'o 300366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 300466acdcf4STheodore Ts'o { 300566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 300666acdcf4STheodore Ts'o } 300766acdcf4STheodore Ts'o 3008ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 300966acdcf4STheodore Ts'o { 301066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 301166acdcf4STheodore Ts'o int rc; 301266acdcf4STheodore Ts'o 3013bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 301466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 301566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 301666acdcf4STheodore Ts'o return rc; 301766acdcf4STheodore Ts'o } 301866acdcf4STheodore Ts'o 3019617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3020ac27a0ecSDave Kleikamp int read_only) 3021ac27a0ecSDave Kleikamp { 3022617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3023c89128a0SJaegeuk Kim int err = 0; 3024ac27a0ecSDave Kleikamp 3025617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3026b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3027b31e1552SEric Sandeen "forcing read-only mode"); 3028c89128a0SJaegeuk Kim err = -EROFS; 30295adaccacSyangerkun goto done; 3030ac27a0ecSDave Kleikamp } 3031ac27a0ecSDave Kleikamp if (read_only) 3032281b5995STheodore Ts'o goto done; 3033617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3034b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3035b31e1552SEric Sandeen "running e2fsck is recommended"); 3036c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3037b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3038b31e1552SEric Sandeen "warning: mounting fs with errors, " 3039b31e1552SEric Sandeen "running e2fsck is recommended"); 3040ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3041ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3042ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3043b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3044b31e1552SEric Sandeen "warning: maximal mount count reached, " 3045b31e1552SEric Sandeen "running e2fsck is recommended"); 3046ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 30476a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 30486a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3049b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3050b31e1552SEric Sandeen "warning: checktime reached, " 3051b31e1552SEric Sandeen "running e2fsck is recommended"); 30520390131bSFrank Mayhar if (!sbi->s_journal) 3053216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3054ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3055617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3056e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 30576a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 305802f310fcSJan Kara if (sbi->s_journal) { 3059e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 306002f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 306102f310fcSJan Kara ext4_set_feature_orphan_present(sb); 306202f310fcSJan Kara } 3063ac27a0ecSDave Kleikamp 30644392fbc4SJan Kara err = ext4_commit_super(sb); 3065281b5995STheodore Ts'o done: 3066ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3067a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3068a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3069ac27a0ecSDave Kleikamp sb->s_blocksize, 3070ac27a0ecSDave Kleikamp sbi->s_groups_count, 3071617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3072617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3073a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3074c89128a0SJaegeuk Kim return err; 3075ac27a0ecSDave Kleikamp } 3076ac27a0ecSDave Kleikamp 3077117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3078117fff10STheodore Ts'o { 3079117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30807c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 308137b0b6b8SDan Carpenter int size, i, j; 3082117fff10STheodore Ts'o 3083117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3084117fff10STheodore Ts'o return 0; 3085117fff10STheodore Ts'o 3086117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3087117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3088117fff10STheodore Ts'o return 0; 3089117fff10STheodore Ts'o 30907c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 30917c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3092117fff10STheodore Ts'o if (!new_groups) { 30937c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 30947c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3095117fff10STheodore Ts'o return -ENOMEM; 3096117fff10STheodore Ts'o } 30977c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 30987c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 30997c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31007c990728SSuraj Jitindar Singh GFP_KERNEL); 31017c990728SSuraj Jitindar Singh if (!new_groups[i]) { 310237b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 310337b0b6b8SDan Carpenter kvfree(new_groups[j]); 31047c990728SSuraj Jitindar Singh kvfree(new_groups); 31057c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31067c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31077c990728SSuraj Jitindar Singh return -ENOMEM; 3108117fff10STheodore Ts'o } 31097c990728SSuraj Jitindar Singh } 31107c990728SSuraj Jitindar Singh rcu_read_lock(); 31117c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31127c990728SSuraj Jitindar Singh if (old_groups) 31137c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31147c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31157c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31167c990728SSuraj Jitindar Singh rcu_read_unlock(); 31177c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31187c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31197c990728SSuraj Jitindar Singh if (old_groups) 31207c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3121117fff10STheodore Ts'o return 0; 3122117fff10STheodore Ts'o } 3123117fff10STheodore Ts'o 3124772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3125772cb7c8SJose R. Santos { 3126772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3127772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31287c990728SSuraj Jitindar Singh struct flex_groups *fg; 3129772cb7c8SJose R. Santos ext4_group_t flex_group; 3130117fff10STheodore Ts'o int i, err; 3131772cb7c8SJose R. Santos 3132503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3133d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3134772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3135772cb7c8SJose R. Santos return 1; 3136772cb7c8SJose R. Santos } 3137772cb7c8SJose R. Santos 3138117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3139117fff10STheodore Ts'o if (err) 3140772cb7c8SJose R. Santos goto failed; 3141772cb7c8SJose R. Santos 3142772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 314388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3144772cb7c8SJose R. Santos 3145772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 31467c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 31477c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 314890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 31497c990728SSuraj Jitindar Singh &fg->free_clusters); 31507c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3151772cb7c8SJose R. Santos } 3152772cb7c8SJose R. Santos 3153772cb7c8SJose R. Santos return 1; 3154772cb7c8SJose R. Santos failed: 3155772cb7c8SJose R. Santos return 0; 3156772cb7c8SJose R. Santos } 3157772cb7c8SJose R. Santos 3158e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3159717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3160717d50e4SAndreas Dilger { 3161b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3162717d50e4SAndreas Dilger __u16 crc = 0; 3163717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3164e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3165717d50e4SAndreas Dilger 31669aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3167feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3168feb0ab32SDarrick J. Wong __u32 csum32; 3169b47820edSDaeho Jeong __u16 dummy_csum = 0; 3170feb0ab32SDarrick J. Wong 3171feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3172feb0ab32SDarrick J. Wong sizeof(le_group)); 3173b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3174b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3175b47820edSDaeho Jeong sizeof(dummy_csum)); 3176b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3177b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3178b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3179b47820edSDaeho Jeong sbi->s_desc_size - offset); 3180feb0ab32SDarrick J. Wong 3181feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3182feb0ab32SDarrick J. Wong goto out; 3183feb0ab32SDarrick J. Wong } 3184feb0ab32SDarrick J. Wong 3185feb0ab32SDarrick J. Wong /* old crc16 code */ 3186e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3187813d32f9SDarrick J. Wong return 0; 3188813d32f9SDarrick J. Wong 3189717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3190717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3191717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3192717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3193717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3194e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3195717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3196717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3197717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3198717d50e4SAndreas Dilger offset); 3199717d50e4SAndreas Dilger 3200feb0ab32SDarrick J. Wong out: 3201717d50e4SAndreas Dilger return cpu_to_le16(crc); 3202717d50e4SAndreas Dilger } 3203717d50e4SAndreas Dilger 3204feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3205717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3206717d50e4SAndreas Dilger { 3207feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3208e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3209717d50e4SAndreas Dilger return 0; 3210717d50e4SAndreas Dilger 3211717d50e4SAndreas Dilger return 1; 3212717d50e4SAndreas Dilger } 3213717d50e4SAndreas Dilger 3214feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3215feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3216feb0ab32SDarrick J. Wong { 3217feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3218feb0ab32SDarrick J. Wong return; 3219e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3220feb0ab32SDarrick J. Wong } 3221feb0ab32SDarrick J. Wong 3222ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3223bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3224829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3225bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3226ac27a0ecSDave Kleikamp { 3227617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3228617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3229617ba13bSMingming Cao ext4_fsblk_t last_block; 323044de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3231bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3232bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3233bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3234ce421581SJose R. Santos int flexbg_flag = 0; 3235bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3236ac27a0ecSDave Kleikamp 3237e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3238ce421581SJose R. Santos flexbg_flag = 1; 3239ce421581SJose R. Santos 3240617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3241ac27a0ecSDave Kleikamp 3242197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3243197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3244197cd65aSAkinobu Mita 3245ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3246bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3247ac27a0ecSDave Kleikamp else 3248ac27a0ecSDave Kleikamp last_block = first_block + 3249617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3250ac27a0ecSDave Kleikamp 3251bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3252bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3253bfff6873SLukas Czerner grp = i; 3254bfff6873SLukas Czerner 32558fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3256829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3257829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3258829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3259829fa70dSTheodore Ts'o "superblock", i); 326018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 326118db4b4eSTheodore Ts'o return 0; 3262829fa70dSTheodore Ts'o } 326377260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 326477260807STheodore Ts'o block_bitmap <= last_bg_block) { 326577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 326677260807STheodore Ts'o "Block bitmap for group %u overlaps " 326777260807STheodore Ts'o "block group descriptors", i); 326877260807STheodore Ts'o if (!sb_rdonly(sb)) 326977260807STheodore Ts'o return 0; 327077260807STheodore Ts'o } 32712b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3272b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3273a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3274b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3275ac27a0ecSDave Kleikamp return 0; 3276ac27a0ecSDave Kleikamp } 32778fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3278829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3279829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3280829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3281829fa70dSTheodore Ts'o "superblock", i); 328218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 328318db4b4eSTheodore Ts'o return 0; 3284829fa70dSTheodore Ts'o } 328577260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 328677260807STheodore Ts'o inode_bitmap <= last_bg_block) { 328777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 328877260807STheodore Ts'o "Inode bitmap for group %u overlaps " 328977260807STheodore Ts'o "block group descriptors", i); 329077260807STheodore Ts'o if (!sb_rdonly(sb)) 329177260807STheodore Ts'o return 0; 329277260807STheodore Ts'o } 32932b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3294b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3295a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3296b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3297ac27a0ecSDave Kleikamp return 0; 3298ac27a0ecSDave Kleikamp } 32998fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3300829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3301829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3302829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3303829fa70dSTheodore Ts'o "superblock", i); 330418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 330518db4b4eSTheodore Ts'o return 0; 3306829fa70dSTheodore Ts'o } 330777260807STheodore Ts'o if (inode_table >= sb_block + 1 && 330877260807STheodore Ts'o inode_table <= last_bg_block) { 330977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 331077260807STheodore Ts'o "Inode table for group %u overlaps " 331177260807STheodore Ts'o "block group descriptors", i); 331277260807STheodore Ts'o if (!sb_rdonly(sb)) 331377260807STheodore Ts'o return 0; 331477260807STheodore Ts'o } 3315bd81d8eeSLaurent Vivier if (inode_table < first_block || 33162b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3318a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3319b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3320ac27a0ecSDave Kleikamp return 0; 3321ac27a0ecSDave Kleikamp } 3322955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3323feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3325b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3326e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3327fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3328bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3329955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3330717d50e4SAndreas Dilger return 0; 3331717d50e4SAndreas Dilger } 33327ee1ec4cSLi Zefan } 3333955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3334ce421581SJose R. Santos if (!flexbg_flag) 3335617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3336ac27a0ecSDave Kleikamp } 3337bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3338bfff6873SLukas Czerner *first_not_zeroed = grp; 3339ac27a0ecSDave Kleikamp return 1; 3340ac27a0ecSDave Kleikamp } 3341ac27a0ecSDave Kleikamp 3342cd2291a4SEric Sandeen /* 3343cd2291a4SEric Sandeen * Maximal extent format file size. 3344cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3345cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3346cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3347cd2291a4SEric Sandeen * so that won't be a limiting factor. 3348cd2291a4SEric Sandeen * 3349f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3350f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3351f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3352f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3353f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3354f17722f9SLukas Czerner * 3355cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3356cd2291a4SEric Sandeen */ 3357f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3358cd2291a4SEric Sandeen { 3359cd2291a4SEric Sandeen loff_t res; 3360cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3361cd2291a4SEric Sandeen 336272deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 336372deb455SChristoph Hellwig 336472deb455SChristoph Hellwig if (!has_huge_files) { 3365cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3366cd2291a4SEric Sandeen 3367cd2291a4SEric Sandeen /* total blocks in file system block size */ 3368cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3369cd2291a4SEric Sandeen upper_limit <<= blkbits; 3370cd2291a4SEric Sandeen } 3371cd2291a4SEric Sandeen 3372f17722f9SLukas Czerner /* 3373f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3374f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3375f17722f9SLukas Czerner * size 3376f17722f9SLukas Czerner */ 3377f17722f9SLukas Czerner res = (1LL << 32) - 1; 3378cd2291a4SEric Sandeen res <<= blkbits; 3379cd2291a4SEric Sandeen 3380cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3381cd2291a4SEric Sandeen if (res > upper_limit) 3382cd2291a4SEric Sandeen res = upper_limit; 3383cd2291a4SEric Sandeen 3384cd2291a4SEric Sandeen return res; 3385cd2291a4SEric Sandeen } 3386ac27a0ecSDave Kleikamp 3387ac27a0ecSDave Kleikamp /* 3388cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 33890fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 33900fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3391ac27a0ecSDave Kleikamp */ 3392f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3393ac27a0ecSDave Kleikamp { 33945c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 33950fc1b451SAneesh Kumar K.V int meta_blocks; 33965c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 339775ca6ad4SRitesh Harjani 339875ca6ad4SRitesh Harjani /* 339975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34000b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34010b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34020b8e58a1SAndreas Dilger * 34030b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34040b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34050fc1b451SAneesh Kumar K.V */ 340672deb455SChristoph Hellwig if (!has_huge_files) { 34070fc1b451SAneesh Kumar K.V /* 340872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 340972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 341072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34110fc1b451SAneesh Kumar K.V */ 34120fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34130fc1b451SAneesh Kumar K.V 34140fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34150fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34160fc1b451SAneesh Kumar K.V 34170fc1b451SAneesh Kumar K.V } else { 34188180a562SAneesh Kumar K.V /* 34198180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34208180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34218180a562SAneesh Kumar K.V * represent total number of blocks in 34228180a562SAneesh Kumar K.V * file system block size 34238180a562SAneesh Kumar K.V */ 34240fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34250fc1b451SAneesh Kumar K.V 34260fc1b451SAneesh Kumar K.V } 34270fc1b451SAneesh Kumar K.V 34285c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34295c93e8ecSZhang Yi res += ppb; 34305c93e8ecSZhang Yi res += ppb * ppb; 34315c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34325c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34335c93e8ecSZhang Yi meta_blocks = 1; 34345c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34355c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 34365c93e8ecSZhang Yi /* Does block tree limit file size? */ 34375c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 34385c93e8ecSZhang Yi goto check_lfs; 34395c93e8ecSZhang Yi 34405c93e8ecSZhang Yi res = upper_limit; 34415c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 34425c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 34430fc1b451SAneesh Kumar K.V /* indirect blocks */ 34440fc1b451SAneesh Kumar K.V meta_blocks = 1; 34455c93e8ecSZhang Yi upper_limit -= ppb; 34460fc1b451SAneesh Kumar K.V /* double indirect blocks */ 34475c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 34485c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 34495c93e8ecSZhang Yi res -= meta_blocks; 34505c93e8ecSZhang Yi goto check_lfs; 34515c93e8ecSZhang Yi } 34525c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34535c93e8ecSZhang Yi upper_limit -= ppb * ppb; 34545c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 34555c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 34565c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 34575c93e8ecSZhang Yi res -= meta_blocks; 34585c93e8ecSZhang Yi check_lfs: 3459ac27a0ecSDave Kleikamp res <<= bits; 34600fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 34610fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 34620fc1b451SAneesh Kumar K.V 34635c93e8ecSZhang Yi return res; 3464ac27a0ecSDave Kleikamp } 3465ac27a0ecSDave Kleikamp 3466617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 346770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3468ac27a0ecSDave Kleikamp { 3469617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3470fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3471ac27a0ecSDave Kleikamp int has_super = 0; 3472ac27a0ecSDave Kleikamp 3473ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3474ac27a0ecSDave Kleikamp 3475e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 347670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3477ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3478617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3479ac27a0ecSDave Kleikamp has_super = 1; 34800b8e58a1SAndreas Dilger 3481bd63f6b0SDarrick J. Wong /* 3482bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3483bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3484bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3485bd63f6b0SDarrick J. Wong * compensate. 3486bd63f6b0SDarrick J. Wong */ 3487bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 348849598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3489bd63f6b0SDarrick J. Wong has_super++; 3490bd63f6b0SDarrick J. Wong 3491617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3492ac27a0ecSDave Kleikamp } 3493ac27a0ecSDave Kleikamp 3494c9de560dSAlex Tomas /** 3495c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3496c9de560dSAlex Tomas * @sbi: In memory super block info 3497c9de560dSAlex Tomas * 3498c9de560dSAlex Tomas * If we have specified it via mount option, then 3499c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3500c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3501c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3502c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3503c9de560dSAlex Tomas * 3504c9de560dSAlex Tomas */ 3505c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3506c9de560dSAlex Tomas { 3507c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3508c9de560dSAlex Tomas unsigned long stripe_width = 3509c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35103eb08658SDan Ehrenberg int ret; 3511c9de560dSAlex Tomas 3512c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35133eb08658SDan Ehrenberg ret = sbi->s_stripe; 35145469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35153eb08658SDan Ehrenberg ret = stripe_width; 35165469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35173eb08658SDan Ehrenberg ret = stride; 35183eb08658SDan Ehrenberg else 35193eb08658SDan Ehrenberg ret = 0; 3520c9de560dSAlex Tomas 35213eb08658SDan Ehrenberg /* 35223eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35233eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35243eb08658SDan Ehrenberg */ 35253eb08658SDan Ehrenberg if (ret <= 1) 35263eb08658SDan Ehrenberg ret = 0; 3527c9de560dSAlex Tomas 35283eb08658SDan Ehrenberg return ret; 3529c9de560dSAlex Tomas } 3530ac27a0ecSDave Kleikamp 3531a13fb1a4SEric Sandeen /* 3532a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3533a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3534a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3535a13fb1a4SEric Sandeen * 0 if it cannot be. 3536a13fb1a4SEric Sandeen */ 353725c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3538a13fb1a4SEric Sandeen { 3539e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3540a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3541a13fb1a4SEric Sandeen "Couldn't mount because of " 3542a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3543a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3544a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3545a13fb1a4SEric Sandeen return 0; 3546a13fb1a4SEric Sandeen } 3547a13fb1a4SEric Sandeen 35485298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3549c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3550c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3551c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3552c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3553c83ad55eSGabriel Krisman Bertazi return 0; 3554c83ad55eSGabriel Krisman Bertazi } 3555c83ad55eSGabriel Krisman Bertazi #endif 3556c83ad55eSGabriel Krisman Bertazi 3557a13fb1a4SEric Sandeen if (readonly) 3558a13fb1a4SEric Sandeen return 1; 3559a13fb1a4SEric Sandeen 3560e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 35612cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 35621751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 35632cb5cc8bSDarrick J. Wong return 1; 35642cb5cc8bSDarrick J. Wong } 35652cb5cc8bSDarrick J. Wong 3566a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3567e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3568a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3569a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3570a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3571a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3572a13fb1a4SEric Sandeen return 0; 3573a13fb1a4SEric Sandeen } 3574e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3575bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3576bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3577bab08ab9STheodore Ts'o "extents feature\n"); 3578bab08ab9STheodore Ts'o return 0; 3579bab08ab9STheodore Ts'o } 35807c319d32SAditya Kali 35819db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3582d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3583d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 35847c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3585d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3586689c958cSLi Xi return 0; 3587689c958cSLi Xi } 35887c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3589a13fb1a4SEric Sandeen return 1; 3590a13fb1a4SEric Sandeen } 3591a13fb1a4SEric Sandeen 359266e61a9eSTheodore Ts'o /* 359366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 359466e61a9eSTheodore Ts'o * on the file system 359566e61a9eSTheodore Ts'o */ 3596235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 359766e61a9eSTheodore Ts'o { 3598235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3599235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3600235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 360166e61a9eSTheodore Ts'o 360266e61a9eSTheodore Ts'o if (es->s_error_count) 3603ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3604ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 360566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 360666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36076a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36086a0678a7SArnd Bergmann sb->s_id, 36096a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 361066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 361166e61a9eSTheodore Ts'o es->s_first_error_func, 361266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 361366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3614651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 361566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 361666e61a9eSTheodore Ts'o if (es->s_first_error_block) 3617651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 361866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3619651e1c3bSJoe Perches printk(KERN_CONT "\n"); 362066e61a9eSTheodore Ts'o } 362166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36226a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36236a0678a7SArnd Bergmann sb->s_id, 36246a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 362566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 362666e61a9eSTheodore Ts'o es->s_last_error_func, 362766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 362866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3629651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 363066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 363166e61a9eSTheodore Ts'o if (es->s_last_error_block) 3632651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 363366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3634651e1c3bSJoe Perches printk(KERN_CONT "\n"); 363566e61a9eSTheodore Ts'o } 363666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 363766e61a9eSTheodore Ts'o } 363866e61a9eSTheodore Ts'o 3639bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3640bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3641bfff6873SLukas Czerner { 3642bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 36433d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 36443d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 36453d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 36463d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3647bfff6873SLukas Czerner int ret = 0; 364839fec688SShaoying Xu u64 start_time; 3649bfff6873SLukas Czerner 36503d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 36513d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 36523d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 36533d392b26STheodore Ts'o if (prefetch_ios) 36543d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 36553d392b26STheodore Ts'o prefetch_ios); 36563d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 36573d392b26STheodore Ts'o prefetch_ios); 36583d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 36593d392b26STheodore Ts'o ret = 1; 36603d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 36613d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 36623d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 36633d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 36643d392b26STheodore Ts'o ret = 0; 36653d392b26STheodore Ts'o } 36663d392b26STheodore Ts'o } 36673d392b26STheodore Ts'o return ret; 36683d392b26STheodore Ts'o } 3669bfff6873SLukas Czerner 36703d392b26STheodore Ts'o for (; group < ngroups; group++) { 3671bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3672bfff6873SLukas Czerner if (!gdp) { 3673bfff6873SLukas Czerner ret = 1; 3674bfff6873SLukas Czerner break; 3675bfff6873SLukas Czerner } 3676bfff6873SLukas Czerner 3677bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3678bfff6873SLukas Czerner break; 3679bfff6873SLukas Czerner } 3680bfff6873SLukas Czerner 36817f511862STheodore Ts'o if (group >= ngroups) 3682bfff6873SLukas Czerner ret = 1; 3683bfff6873SLukas Czerner 3684bfff6873SLukas Czerner if (!ret) { 368539fec688SShaoying Xu start_time = ktime_get_real_ns(); 3686bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3687bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 36883d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3689bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 369039fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 369139fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3692bfff6873SLukas Czerner } 3693bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3694bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3695bfff6873SLukas Czerner } 3696bfff6873SLukas Czerner return ret; 3697bfff6873SLukas Czerner } 3698bfff6873SLukas Czerner 3699bfff6873SLukas Czerner /* 3700bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37014ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3702bfff6873SLukas Czerner */ 3703bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3704bfff6873SLukas Czerner { 3705bfff6873SLukas Czerner if (!elr) 3706bfff6873SLukas Czerner return; 3707bfff6873SLukas Czerner 3708bfff6873SLukas Czerner list_del(&elr->lr_request); 37093d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3710bfff6873SLukas Czerner kfree(elr); 3711bfff6873SLukas Czerner } 3712bfff6873SLukas Czerner 3713bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3714bfff6873SLukas Czerner { 37151bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37161bb933fbSLukas Czerner if (!ext4_li_info) { 37171bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3718bfff6873SLukas Czerner return; 37191bb933fbSLukas Czerner } 3720bfff6873SLukas Czerner 3721bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37221bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3723bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37241bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3725bfff6873SLukas Czerner } 3726bfff6873SLukas Czerner 37278f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37288f1f7453SEric Sandeen 3729bfff6873SLukas Czerner /* 3730bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3731bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3732bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3733bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3734bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3735bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3736bfff6873SLukas Czerner * next waking time and put itself into sleep. 3737bfff6873SLukas Czerner */ 3738bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3739bfff6873SLukas Czerner { 3740c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3741bfff6873SLukas Czerner struct list_head *pos, *n; 3742bfff6873SLukas Czerner struct ext4_li_request *elr; 37434ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3744bfff6873SLukas Czerner 3745bfff6873SLukas Czerner BUG_ON(NULL == eli); 37463b575495SLalith Rajendran set_freezable(); 3747bfff6873SLukas Czerner 3748bfff6873SLukas Czerner cont_thread: 3749bfff6873SLukas Czerner while (true) { 3750bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3751bfff6873SLukas Czerner 3752bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3753bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3754bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3755bfff6873SLukas Czerner goto exit_thread; 3756bfff6873SLukas Czerner } 3757bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3758e22834f0SDmitry Monakhov int err = 0; 3759e22834f0SDmitry Monakhov int progress = 0; 3760bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3761bfff6873SLukas Czerner lr_request); 3762bfff6873SLukas Czerner 3763e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3764e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3765e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3766e22834f0SDmitry Monakhov continue; 3767e22834f0SDmitry Monakhov } 3768e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3769e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3770e22834f0SDmitry Monakhov progress = 1; 3771e22834f0SDmitry Monakhov /* 3772e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3773e22834f0SDmitry Monakhov * be removed from the list, it is 3774e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3775e22834f0SDmitry Monakhov */ 3776e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3777e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3778e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3779e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3780e22834f0SDmitry Monakhov n = pos->next; 3781e22834f0SDmitry Monakhov } 3782e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3783e22834f0SDmitry Monakhov } 3784b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3785e22834f0SDmitry Monakhov if (err) { 3786bfff6873SLukas Czerner ext4_remove_li_request(elr); 3787bfff6873SLukas Czerner continue; 3788bfff6873SLukas Czerner } 3789e22834f0SDmitry Monakhov if (!progress) { 3790e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3791e22834f0SDmitry Monakhov (prandom_u32() 3792e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3793b2c78cd0STheodore Ts'o } 3794bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3795bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3796bfff6873SLukas Czerner } 3797bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3798bfff6873SLukas Czerner 3799a0acae0eSTejun Heo try_to_freeze(); 3800bfff6873SLukas Czerner 38014ed5c033SLukas Czerner cur = jiffies; 38024ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3803f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3804bfff6873SLukas Czerner cond_resched(); 3805bfff6873SLukas Czerner continue; 3806bfff6873SLukas Czerner } 3807bfff6873SLukas Czerner 38084ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38094ed5c033SLukas Czerner 38108f1f7453SEric Sandeen if (kthread_should_stop()) { 38118f1f7453SEric Sandeen ext4_clear_request_list(); 38128f1f7453SEric Sandeen goto exit_thread; 38138f1f7453SEric Sandeen } 3814bfff6873SLukas Czerner } 3815bfff6873SLukas Czerner 3816bfff6873SLukas Czerner exit_thread: 3817bfff6873SLukas Czerner /* 3818bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3819bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3820bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3821bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3822bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3823bfff6873SLukas Czerner * new one. 3824bfff6873SLukas Czerner */ 3825bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3826bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3827bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3828bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3829bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3830bfff6873SLukas Czerner goto cont_thread; 3831bfff6873SLukas Czerner } 3832bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3833bfff6873SLukas Czerner kfree(ext4_li_info); 3834bfff6873SLukas Czerner ext4_li_info = NULL; 3835bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3836bfff6873SLukas Czerner 3837bfff6873SLukas Czerner return 0; 3838bfff6873SLukas Czerner } 3839bfff6873SLukas Czerner 3840bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3841bfff6873SLukas Czerner { 3842bfff6873SLukas Czerner struct list_head *pos, *n; 3843bfff6873SLukas Czerner struct ext4_li_request *elr; 3844bfff6873SLukas Czerner 3845bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3846bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3847bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3848bfff6873SLukas Czerner lr_request); 3849bfff6873SLukas Czerner ext4_remove_li_request(elr); 3850bfff6873SLukas Czerner } 3851bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3852bfff6873SLukas Czerner } 3853bfff6873SLukas Czerner 3854bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3855bfff6873SLukas Czerner { 38568f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 38578f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 38588f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 38598f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3860bfff6873SLukas Czerner ext4_clear_request_list(); 3861bfff6873SLukas Czerner kfree(ext4_li_info); 3862bfff6873SLukas Czerner ext4_li_info = NULL; 386392b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3864bfff6873SLukas Czerner "initialization thread\n", 3865bfff6873SLukas Czerner err); 3866bfff6873SLukas Czerner return err; 3867bfff6873SLukas Czerner } 3868bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3869bfff6873SLukas Czerner return 0; 3870bfff6873SLukas Czerner } 3871bfff6873SLukas Czerner 3872bfff6873SLukas Czerner /* 3873bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3874bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3875bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3876bfff6873SLukas Czerner * groups and return total number of groups. 3877bfff6873SLukas Czerner */ 3878bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3879bfff6873SLukas Czerner { 3880bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3881bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3882bfff6873SLukas Czerner 38838844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 38848844618dSTheodore Ts'o return ngroups; 38858844618dSTheodore Ts'o 3886bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3887bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3888bfff6873SLukas Czerner if (!gdp) 3889bfff6873SLukas Czerner continue; 3890bfff6873SLukas Czerner 389150122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3892bfff6873SLukas Czerner break; 3893bfff6873SLukas Czerner } 3894bfff6873SLukas Czerner 3895bfff6873SLukas Czerner return group; 3896bfff6873SLukas Czerner } 3897bfff6873SLukas Czerner 3898bfff6873SLukas Czerner static int ext4_li_info_new(void) 3899bfff6873SLukas Czerner { 3900bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3901bfff6873SLukas Czerner 3902bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3903bfff6873SLukas Czerner if (!eli) 3904bfff6873SLukas Czerner return -ENOMEM; 3905bfff6873SLukas Czerner 3906bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3907bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3908bfff6873SLukas Czerner 3909bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3910bfff6873SLukas Czerner 3911bfff6873SLukas Czerner ext4_li_info = eli; 3912bfff6873SLukas Czerner 3913bfff6873SLukas Czerner return 0; 3914bfff6873SLukas Czerner } 3915bfff6873SLukas Czerner 3916bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3917bfff6873SLukas Czerner ext4_group_t start) 3918bfff6873SLukas Czerner { 3919bfff6873SLukas Czerner struct ext4_li_request *elr; 3920bfff6873SLukas Czerner 3921bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3922bfff6873SLukas Czerner if (!elr) 3923bfff6873SLukas Czerner return NULL; 3924bfff6873SLukas Czerner 3925bfff6873SLukas Czerner elr->lr_super = sb; 39263d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 392721175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39283d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3929bfff6873SLukas Czerner elr->lr_next_group = start; 393021175ca4SHarshad Shirwadkar } else { 393121175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39323d392b26STheodore Ts'o } 3933bfff6873SLukas Czerner 3934bfff6873SLukas Czerner /* 3935bfff6873SLukas Czerner * Randomize first schedule time of the request to 3936bfff6873SLukas Czerner * spread the inode table initialization requests 3937bfff6873SLukas Czerner * better. 3938bfff6873SLukas Czerner */ 3939dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3940dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3941bfff6873SLukas Czerner return elr; 3942bfff6873SLukas Czerner } 3943bfff6873SLukas Czerner 39447f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3945bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3946bfff6873SLukas Czerner { 3947bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 39487f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 394949598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 39506c5a6cb9SAndrew Morton int ret = 0; 3951bfff6873SLukas Czerner 39527f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 395351ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 395451ce6511SLukas Czerner /* 395551ce6511SLukas Czerner * Reset timeout so it can be computed again, because 395651ce6511SLukas Czerner * s_li_wait_mult might have changed. 395751ce6511SLukas Czerner */ 395851ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 39597f511862STheodore Ts'o goto out; 396051ce6511SLukas Czerner } 3961bfff6873SLukas Czerner 3962426d15adSJosh Triplett if (sb_rdonly(sb) || 3963426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 3964426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 39657f511862STheodore Ts'o goto out; 3966bfff6873SLukas Czerner 3967bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 39687f511862STheodore Ts'o if (!elr) { 39697f511862STheodore Ts'o ret = -ENOMEM; 39707f511862STheodore Ts'o goto out; 39717f511862STheodore Ts'o } 3972bfff6873SLukas Czerner 3973bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3974bfff6873SLukas Czerner ret = ext4_li_info_new(); 3975bfff6873SLukas Czerner if (ret) 3976bfff6873SLukas Czerner goto out; 3977bfff6873SLukas Czerner } 3978bfff6873SLukas Czerner 3979bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3980bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3981bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3982bfff6873SLukas Czerner 3983bfff6873SLukas Czerner sbi->s_li_request = elr; 398446e4690bSTao Ma /* 398546e4690bSTao Ma * set elr to NULL here since it has been inserted to 398646e4690bSTao Ma * the request_list and the removal and free of it is 398746e4690bSTao Ma * handled by ext4_clear_request_list from now on. 398846e4690bSTao Ma */ 398946e4690bSTao Ma elr = NULL; 3990bfff6873SLukas Czerner 3991bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3992bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3993bfff6873SLukas Czerner if (ret) 3994bfff6873SLukas Czerner goto out; 3995bfff6873SLukas Czerner } 3996bfff6873SLukas Czerner out: 3997bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3998beed5ecbSNicolas Kaiser if (ret) 3999bfff6873SLukas Czerner kfree(elr); 4000bfff6873SLukas Czerner return ret; 4001bfff6873SLukas Czerner } 4002bfff6873SLukas Czerner 4003bfff6873SLukas Czerner /* 4004bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4005bfff6873SLukas Czerner * module unload. 4006bfff6873SLukas Czerner */ 4007bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4008bfff6873SLukas Czerner { 4009bfff6873SLukas Czerner /* 4010bfff6873SLukas Czerner * If thread exited earlier 4011bfff6873SLukas Czerner * there's nothing to be done. 4012bfff6873SLukas Czerner */ 40138f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4014bfff6873SLukas Czerner return; 4015bfff6873SLukas Czerner 40168f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4017bfff6873SLukas Czerner } 4018bfff6873SLukas Czerner 401925ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 402025ed6e8aSDarrick J. Wong { 402125ed6e8aSDarrick J. Wong int ret = 1; 402225ed6e8aSDarrick J. Wong int compat, incompat; 402325ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 402425ed6e8aSDarrick J. Wong 40259aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4026db9ee220SDarrick J. Wong /* journal checksum v3 */ 402725ed6e8aSDarrick J. Wong compat = 0; 4028db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 402925ed6e8aSDarrick J. Wong } else { 403025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 403125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 403225ed6e8aSDarrick J. Wong incompat = 0; 403325ed6e8aSDarrick J. Wong } 403425ed6e8aSDarrick J. Wong 4035feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4036feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4037feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4038feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 403925ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 404025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 404125ed6e8aSDarrick J. Wong compat, 0, 404225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 404325ed6e8aSDarrick J. Wong incompat); 404425ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 404525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 404625ed6e8aSDarrick J. Wong compat, 0, 404725ed6e8aSDarrick J. Wong incompat); 404825ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 404925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 405025ed6e8aSDarrick J. Wong } else { 4051feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4052feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 405325ed6e8aSDarrick J. Wong } 405425ed6e8aSDarrick J. Wong 405525ed6e8aSDarrick J. Wong return ret; 405625ed6e8aSDarrick J. Wong } 405725ed6e8aSDarrick J. Wong 4058952fc18eSTheodore Ts'o /* 4059952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4060952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4061952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4062952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4063952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4064952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4065952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4066952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4067952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4068952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4069952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4070952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4071952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4072952fc18eSTheodore Ts'o */ 4073952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4074952fc18eSTheodore Ts'o char *buf) 4075952fc18eSTheodore Ts'o { 4076952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4077952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4078952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4079952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4080952fc18eSTheodore Ts'o int s, j, count = 0; 408110b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4082952fc18eSTheodore Ts'o 4083e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 408410b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 408510b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 40860548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 40870548bbb8STheodore Ts'o 4088952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4089952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4090952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4091952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4092952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4093952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4094952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4095952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4096952fc18eSTheodore Ts'o count++; 4097952fc18eSTheodore Ts'o } 4098952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4099952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4100952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4101952fc18eSTheodore Ts'o count++; 4102952fc18eSTheodore Ts'o } 4103952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4104952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4105952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4106952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4107952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4108952fc18eSTheodore Ts'o count++; 4109952fc18eSTheodore Ts'o } 4110952fc18eSTheodore Ts'o if (i != grp) 4111952fc18eSTheodore Ts'o continue; 4112952fc18eSTheodore Ts'o s = 0; 4113952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4114952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4115952fc18eSTheodore Ts'o count++; 4116952fc18eSTheodore Ts'o } 4117c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4118c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4119c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4120c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4121c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4122952fc18eSTheodore Ts'o } 4123c48ae41bSTheodore Ts'o count += j; 4124c48ae41bSTheodore Ts'o for (; j > 0; j--) 4125c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4126952fc18eSTheodore Ts'o } 4127952fc18eSTheodore Ts'o if (!count) 4128952fc18eSTheodore Ts'o return 0; 4129952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4130952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4131952fc18eSTheodore Ts'o } 4132952fc18eSTheodore Ts'o 4133952fc18eSTheodore Ts'o /* 4134952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4135952fc18eSTheodore Ts'o */ 4136952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4137952fc18eSTheodore Ts'o { 4138952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4139952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 41403c816dedSEric Whitney struct inode *j_inode; 41413c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4142952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4143952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 41444fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4145952fc18eSTheodore Ts'o 4146952fc18eSTheodore Ts'o if (!buf) 4147952fc18eSTheodore Ts'o return -ENOMEM; 4148952fc18eSTheodore Ts'o 4149952fc18eSTheodore Ts'o /* 4150952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4151952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4152952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4153952fc18eSTheodore Ts'o */ 4154952fc18eSTheodore Ts'o 4155952fc18eSTheodore Ts'o /* 4156952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4157952fc18eSTheodore Ts'o */ 4158952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4159952fc18eSTheodore Ts'o 4160952fc18eSTheodore Ts'o /* 4161952fc18eSTheodore Ts'o * Add the overhead found in each block group 4162952fc18eSTheodore Ts'o */ 4163952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4164952fc18eSTheodore Ts'o int blks; 4165952fc18eSTheodore Ts'o 4166952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4167952fc18eSTheodore Ts'o overhead += blks; 4168952fc18eSTheodore Ts'o if (blks) 4169952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4170952fc18eSTheodore Ts'o cond_resched(); 4171952fc18eSTheodore Ts'o } 41723c816dedSEric Whitney 41733c816dedSEric Whitney /* 41743c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 41753c816dedSEric Whitney * loaded or not 41763c816dedSEric Whitney */ 4177ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4178ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4179f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4180f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 41813c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 41823c816dedSEric Whitney if (j_inode) { 41833c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 41843c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 41853c816dedSEric Whitney iput(j_inode); 41863c816dedSEric Whitney } else { 41873c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 41883c816dedSEric Whitney } 41893c816dedSEric Whitney } 4190952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4191952fc18eSTheodore Ts'o smp_wmb(); 4192952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4193952fc18eSTheodore Ts'o return 0; 4194952fc18eSTheodore Ts'o } 4195952fc18eSTheodore Ts'o 4196b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 419727dd4385SLukas Czerner { 419827dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4199b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 420027dd4385SLukas Czerner 420127dd4385SLukas Czerner /* 420230fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 420330fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 420430fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 420530fac0f7SJan Kara * to keep ext2/3 backward compatibility. 420630fac0f7SJan Kara */ 4207e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4208b5799018STheodore Ts'o return; 420930fac0f7SJan Kara /* 421027dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 421127dd4385SLukas Czerner * This should cover the situations where we can not afford to run 421227dd4385SLukas Czerner * out of space like for example punch hole, or converting 4213556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 421427dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 421527dd4385SLukas Czerner * very rare. 421627dd4385SLukas Czerner */ 4217b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4218b5799018STheodore Ts'o sbi->s_cluster_bits); 421927dd4385SLukas Czerner 422027dd4385SLukas Czerner do_div(resv_clusters, 50); 422127dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 422227dd4385SLukas Czerner 4223b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 422427dd4385SLukas Czerner } 422527dd4385SLukas Czerner 4226ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4227ca9b404fSRoman Anufriev { 4228ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4229ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4230ca9b404fSRoman Anufriev return "none"; 4231ca9b404fSRoman Anufriev 4232ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4233ca9b404fSRoman Anufriev return "journalled"; 4234ca9b404fSRoman Anufriev else 4235ca9b404fSRoman Anufriev return "writeback"; 4236ca9b404fSRoman Anufriev #else 4237ca9b404fSRoman Anufriev return "disabled"; 4238ca9b404fSRoman Anufriev #endif 4239ca9b404fSRoman Anufriev } 4240ca9b404fSRoman Anufriev 4241188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4242188c299eSJan Kara enum ext4_journal_trigger_type type, 4243188c299eSJan Kara void (*trigger)( 4244188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4245188c299eSJan Kara struct buffer_head *bh, 4246188c299eSJan Kara void *mapped_data, 4247188c299eSJan Kara size_t size)) 4248188c299eSJan Kara { 4249188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4250188c299eSJan Kara 4251188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4252188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4253188c299eSJan Kara } 4254188c299eSJan Kara 42557edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4256ac27a0ecSDave Kleikamp { 42577edfd85bSLukas Czerner if (!sbi) 42587edfd85bSLukas Czerner return; 42597edfd85bSLukas Czerner 42607edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 42618012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 42627edfd85bSLukas Czerner kfree(sbi); 42637edfd85bSLukas Czerner } 42647edfd85bSLukas Czerner 42657edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 42667edfd85bSLukas Czerner { 42677edfd85bSLukas Czerner struct ext4_sb_info *sbi; 42687edfd85bSLukas Czerner 42697edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 42707edfd85bSLukas Czerner if (!sbi) 42717edfd85bSLukas Czerner return NULL; 42727edfd85bSLukas Czerner 42738012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 42748012b866SShiyang Ruan NULL, NULL); 42757edfd85bSLukas Czerner 42767edfd85bSLukas Czerner sbi->s_blockgroup_lock = 42777edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 42787edfd85bSLukas Czerner 42797edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 42807edfd85bSLukas Czerner goto err_out; 42817edfd85bSLukas Czerner 42827edfd85bSLukas Czerner sb->s_fs_info = sbi; 42837edfd85bSLukas Czerner sbi->s_sb = sb; 42847edfd85bSLukas Czerner return sbi; 42857edfd85bSLukas Czerner err_out: 42868012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 42877edfd85bSLukas Czerner kfree(sbi); 42887edfd85bSLukas Czerner return NULL; 42897edfd85bSLukas Czerner } 42907edfd85bSLukas Czerner 4291960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 42927edfd85bSLukas Czerner { 42931d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4294617ba13bSMingming Cao struct ext4_super_block *es = NULL; 42957edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 42967c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4297617ba13bSMingming Cao ext4_fsblk_t block; 429870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4299ac27a0ecSDave Kleikamp unsigned long offset = 0; 4300ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4301ac27a0ecSDave Kleikamp struct inode *root; 4302dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4303281b5995STheodore Ts'o int blocksize, clustersize; 43044ec11028STheodore Ts'o unsigned int db_count; 43054ec11028STheodore Ts'o unsigned int i; 4306ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4307bd81d8eeSLaurent Vivier __u64 blocks_count; 430807aa2ea1SLukas Czerner int err = 0; 4309bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 43107edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4311960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 4312b237e304SHarshad Shirwadkar 4313b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4314e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 43157edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4316ac27a0ecSDave Kleikamp 4317240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4318f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 43198446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4320ac27a0ecSDave Kleikamp 432107aa2ea1SLukas Czerner /* -EINVAL is default */ 4322dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4323617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4324ac27a0ecSDave Kleikamp if (!blocksize) { 4325b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4326ac27a0ecSDave Kleikamp goto out_fail; 4327ac27a0ecSDave Kleikamp } 4328ac27a0ecSDave Kleikamp 4329ac27a0ecSDave Kleikamp /* 4330617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4331ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4332ac27a0ecSDave Kleikamp */ 4333617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 43347edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 433570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4336ac27a0ecSDave Kleikamp } else { 43377edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4338ac27a0ecSDave Kleikamp } 4339ac27a0ecSDave Kleikamp 43408394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 43418394a6abSzhangyi (F) if (IS_ERR(bh)) { 4342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 43438394a6abSzhangyi (F) ret = PTR_ERR(bh); 4344ac27a0ecSDave Kleikamp goto out_fail; 4345ac27a0ecSDave Kleikamp } 4346ac27a0ecSDave Kleikamp /* 4347ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4348617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4349ac27a0ecSDave Kleikamp */ 43502716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4351ac27a0ecSDave Kleikamp sbi->s_es = es; 4352ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4353617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4354617ba13bSMingming Cao goto cantfind_ext4; 4355afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4356ac27a0ecSDave Kleikamp 4357feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4358e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4359e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4360363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4361feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4362feb0ab32SDarrick J. Wong 4363d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4364d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4365d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4366d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4367d25425f8SDarrick J. Wong silent = 1; 4368d25425f8SDarrick J. Wong goto cantfind_ext4; 4369d25425f8SDarrick J. Wong } 437002f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 437102f310fcSJan Kara ext4_orphan_file_block_trigger); 4372d25425f8SDarrick J. Wong 43730441984aSDarrick J. Wong /* Load the checksum driver */ 43740441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 43750441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 43760441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 43770441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 43780441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 43790441984aSDarrick J. Wong goto failed_mount; 43800441984aSDarrick J. Wong } 43810441984aSDarrick J. Wong 4382a9c47317SDarrick J. Wong /* Check superblock checksum */ 4383a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4384a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4385a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4386a9c47317SDarrick J. Wong silent = 1; 43876a797d27SDarrick J. Wong ret = -EFSBADCRC; 4388a9c47317SDarrick J. Wong goto cantfind_ext4; 4389a9c47317SDarrick J. Wong } 4390a9c47317SDarrick J. Wong 4391a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4392e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 43938c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4394dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4395a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4396a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4397a9c47317SDarrick J. Wong 4398ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4399ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4400fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4401617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4402fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 440387f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4404fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4405617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4406fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4407ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4408fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 440903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4410fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 44112e7842b8SHugh Dickins #endif 4412995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4413995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 441498c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 441598c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 441698c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 441798c1a759SDarrick J. Wong 4418617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4419fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4420617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4421fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4422617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4423fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4424ac27a0ecSDave Kleikamp 4425617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4426fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4427bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4428fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4429bb4f397aSAneesh Kumar K.V else 4430fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 443145f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4432fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 44338b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4434fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4435ac27a0ecSDave Kleikamp 443608cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 443708cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 443830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 443930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 444030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4441ac27a0ecSDave Kleikamp 44428b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4443fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4444ac27a0ecSDave Kleikamp 44451e2462f9SMingming Cao /* 4446dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4447dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4448dd919b98SAneesh Kumar K.V */ 4449bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 44508b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4451fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4452dd919b98SAneesh Kumar K.V 445351ce6511SLukas Czerner /* 445451ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 445551ce6511SLukas Czerner * no mount option specified. 445651ce6511SLukas Czerner */ 445751ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 445851ce6511SLukas Czerner 4459c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4460c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4461c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4462c9200760STheodore Ts'o "Invalid log block size: %u", 4463c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4464c9200760STheodore Ts'o goto failed_mount; 4465c9200760STheodore Ts'o } 4466c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4467c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4468c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4469c9200760STheodore Ts'o "Invalid log cluster size: %u", 4470c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4471c9200760STheodore Ts'o goto failed_mount; 4472c9200760STheodore Ts'o } 4473c9200760STheodore Ts'o 4474c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4475626b035bSRitesh Harjani 4476626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4477626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4478626b035bSRitesh Harjani 44799803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44809803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44819803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44829803387cSTheodore Ts'o } else { 44839803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 44849803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 44859803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 44869803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 44879803387cSTheodore Ts'o sbi->s_first_ino); 44889803387cSTheodore Ts'o goto failed_mount; 44899803387cSTheodore Ts'o } 44909803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 44919803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 44929803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 44939803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44949803387cSTheodore Ts'o "unsupported inode size: %d", 44959803387cSTheodore Ts'o sbi->s_inode_size); 44964f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 44979803387cSTheodore Ts'o goto failed_mount; 44989803387cSTheodore Ts'o } 44999803387cSTheodore Ts'o /* 45009803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 45019803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 45029803387cSTheodore Ts'o * field should suffice to ensure we have extra space 45039803387cSTheodore Ts'o * for all three. 45049803387cSTheodore Ts'o */ 45059803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45069803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45079803387cSTheodore Ts'o sb->s_time_gran = 1; 45089803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45099803387cSTheodore Ts'o } else { 45109803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 45119803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45129803387cSTheodore Ts'o } 45139803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 45149803387cSTheodore Ts'o } 45159803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45169803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45179803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 45189803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 45199803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 45209803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 45219803387cSTheodore Ts'o 45229803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 45239803387cSTheodore Ts'o if (v > max) { 45249803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45259803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 45269803387cSTheodore Ts'o goto failed_mount; 45279803387cSTheodore Ts'o } 45289803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 45299803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 45309803387cSTheodore Ts'o 45319803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 45329803387cSTheodore Ts'o if (v > max) { 45339803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45349803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 45359803387cSTheodore Ts'o goto failed_mount; 45369803387cSTheodore Ts'o } 45379803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 45389803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 45399803387cSTheodore Ts'o } 45409803387cSTheodore Ts'o } 45419803387cSTheodore Ts'o 45427edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 45437edfd85bSLukas Czerner if (err < 0) 45445aee0f8aSTheodore Ts'o goto failed_mount; 45457edfd85bSLukas Czerner 45465a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 45477edfd85bSLukas Czerner 45487edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 45497edfd85bSLukas Czerner if (err < 0) 45507edfd85bSLukas Czerner goto failed_mount; 45517edfd85bSLukas Czerner 455285456054SEric Biggers ext4_apply_options(fc, sb); 4553ac27a0ecSDave Kleikamp 45545298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 4555f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4556c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4557c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4558aa8bf298SChristoph Hellwig __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 4559c83ad55eSGabriel Krisman Bertazi 4560aa8bf298SChristoph Hellwig encoding_info = ext4_sb_read_encoding(es); 4561aa8bf298SChristoph Hellwig if (!encoding_info) { 4562c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4563c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4564c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4565c83ad55eSGabriel Krisman Bertazi } 4566c83ad55eSGabriel Krisman Bertazi 4567c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4568c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4569c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 457049bd03ccSChristoph Hellwig "can't mount with superblock charset: %s-%u.%u.%u " 4571c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 457249bd03ccSChristoph Hellwig encoding_info->name, 457349bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 457449bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 457549bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 4576c83ad55eSGabriel Krisman Bertazi encoding_flags); 4577c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4578c83ad55eSGabriel Krisman Bertazi } 4579c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 458049bd03ccSChristoph Hellwig "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 458149bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 458249bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 458349bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 458449bd03ccSChristoph Hellwig encoding_flags); 4585c83ad55eSGabriel Krisman Bertazi 4586f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4587f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4588c83ad55eSGabriel Krisman Bertazi } 4589c83ad55eSGabriel Krisman Bertazi #endif 4590c83ad55eSGabriel Krisman Bertazi 459156889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4592556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4593781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4594244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4595556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 459656889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 459756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 459856889787STheodore Ts'o "both data=journal and delalloc"); 459956889787STheodore Ts'o goto failed_mount; 460056889787STheodore Ts'o } 4601fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4602923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4603923ae0ffSRoss Zwisler "both data=journal and dax"); 4604923ae0ffSRoss Zwisler goto failed_mount; 4605923ae0ffSRoss Zwisler } 460673b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 460773b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 460873b92a2aSSergey Karamov "encrypted files will use data=ordered " 460973b92a2aSSergey Karamov "instead of data journaling mode"); 461073b92a2aSSergey Karamov } 461156889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 461256889787STheodore Ts'o clear_opt(sb, DELALLOC); 4613001e4a87STejun Heo } else { 4614001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 461556889787STheodore Ts'o } 461656889787STheodore Ts'o 46171751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 46181751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4619ac27a0ecSDave Kleikamp 4620*1ff20307SJeff Layton /* i_version is always enabled now */ 4621*1ff20307SJeff Layton sb->s_flags |= SB_I_VERSION; 4622*1ff20307SJeff Layton 4623617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4624e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4625e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4626e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4627b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4628b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4629b31e1552SEric Sandeen "running e2fsck is recommended"); 4630469108ffSTheodore Tso 4631ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4632ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4633e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4634ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4635ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4636ed3654ebSTheodore Ts'o goto failed_mount; 4637ed3654ebSTheodore Ts'o } 4638dec214d0STahsin Erdogan 4639dec214d0STahsin Erdogan /* 4640dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4641dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4642dec214d0STahsin Erdogan */ 4643dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4644dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4645dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4646dec214d0STahsin Erdogan goto failed_mount; 4647dec214d0STahsin Erdogan } 4648ed3654ebSTheodore Ts'o } 4649ed3654ebSTheodore Ts'o 46502035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 46512035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 46522035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 46532035e776STheodore Ts'o "using the ext4 subsystem"); 46542035e776STheodore Ts'o else { 46550d9366d6SEric Sandeen /* 46560d9366d6SEric Sandeen * If we're probing be silent, if this looks like 46570d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 46580d9366d6SEric Sandeen */ 46590d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 46600d9366d6SEric Sandeen goto failed_mount; 46612035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 46622035e776STheodore Ts'o "to feature incompatibilities"); 46632035e776STheodore Ts'o goto failed_mount; 46642035e776STheodore Ts'o } 46652035e776STheodore Ts'o } 46662035e776STheodore Ts'o 46672035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 46682035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 46692035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 46702035e776STheodore Ts'o "using the ext4 subsystem"); 46712035e776STheodore Ts'o else { 46720d9366d6SEric Sandeen /* 46730d9366d6SEric Sandeen * If we're probing be silent, if this looks like 46740d9366d6SEric Sandeen * it's actually an ext4 filesystem. 46750d9366d6SEric Sandeen */ 46760d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 46770d9366d6SEric Sandeen goto failed_mount; 46782035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 46792035e776STheodore Ts'o "to feature incompatibilities"); 46802035e776STheodore Ts'o goto failed_mount; 46812035e776STheodore Ts'o } 46822035e776STheodore Ts'o } 46832035e776STheodore Ts'o 4684469108ffSTheodore Tso /* 4685ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4686ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4687ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4688ac27a0ecSDave Kleikamp */ 4689bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4690ac27a0ecSDave Kleikamp goto failed_mount; 4691a13fb1a4SEric Sandeen 46925b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 46935b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46945b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 46955b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 46965b9554dcSTheodore Ts'o goto failed_mount; 46975b9554dcSTheodore Ts'o } 46985b9554dcSTheodore Ts'o 469989b93a7bSChristoph Hellwig if (sbi->s_daxdev) { 47007b0800d0SChristoph Hellwig if (blocksize == PAGE_SIZE) 4701a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 47027b0800d0SChristoph Hellwig else 47037b0800d0SChristoph Hellwig ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 47047b0800d0SChristoph Hellwig } 4705a8ab6d38SIra Weiny 4706fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4707559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4708559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4709559db4c6SRoss Zwisler " that may contain inline data"); 4710361d24d4SEric Sandeen goto failed_mount; 4711559db4c6SRoss Zwisler } 4712a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 471324f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4714361d24d4SEric Sandeen "DAX unsupported by block device."); 4715361d24d4SEric Sandeen goto failed_mount; 471624f3478dSDan Williams } 4717923ae0ffSRoss Zwisler } 4718923ae0ffSRoss Zwisler 4719e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 47206ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 47216ddb2447STheodore Ts'o es->s_encryption_level); 47226ddb2447STheodore Ts'o goto failed_mount; 47236ddb2447STheodore Ts'o } 47246ddb2447STheodore Ts'o 4725ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4726afd09b61SAlexey Makhalov /* 4727afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4728afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4729afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4730afd09b61SAlexey Makhalov */ 4731afd09b61SAlexey Makhalov brelse(bh); 4732ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4733ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4734b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4735ce40733cSAneesh Kumar K.V blocksize); 4736afd09b61SAlexey Makhalov bh = NULL; 4737ac27a0ecSDave Kleikamp goto failed_mount; 4738ac27a0ecSDave Kleikamp } 4739ac27a0ecSDave Kleikamp 47407edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 474170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 47428394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 47438394a6abSzhangyi (F) if (IS_ERR(bh)) { 4744b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4745b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 47468394a6abSzhangyi (F) ret = PTR_ERR(bh); 47478394a6abSzhangyi (F) bh = NULL; 4748ac27a0ecSDave Kleikamp goto failed_mount; 4749ac27a0ecSDave Kleikamp } 47502716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4751ac27a0ecSDave Kleikamp sbi->s_es = es; 4752617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4753b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4754b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4755ac27a0ecSDave Kleikamp goto failed_mount; 4756ac27a0ecSDave Kleikamp } 4757ac27a0ecSDave Kleikamp } 4758ac27a0ecSDave Kleikamp 4759e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4760f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4761f287a1a5STheodore Ts'o has_huge_files); 4762f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4763ac27a0ecSDave Kleikamp 47640d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4765e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 47668fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 47670d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4768d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4769b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4770b31e1552SEric Sandeen "unsupported descriptor size %lu", 47710d1ee42fSAlexandre Ratchov sbi->s_desc_size); 47720d1ee42fSAlexandre Ratchov goto failed_mount; 47730d1ee42fSAlexandre Ratchov } 47740d1ee42fSAlexandre Ratchov } else 47750d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 47760b8e58a1SAndreas Dilger 4777ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4778ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 47790b8e58a1SAndreas Dilger 4780617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4781ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4782617ba13bSMingming Cao goto cantfind_ext4; 4783cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4784cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4785cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4786b9c538daSJosh Triplett sbi->s_inodes_per_group); 4787cd6bb35bSTheodore Ts'o goto failed_mount; 4788cd6bb35bSTheodore Ts'o } 4789ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4790ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 47910d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4792ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4793c878bea3STheodore Ts'o sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 4794e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4795e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 47960b8e58a1SAndreas Dilger 4797ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4798ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4799ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4800e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4801f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4802f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4803f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4804f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4805f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4806bc98a42cSDavid Howells if (!sb_rdonly(sb)) 480723301410STheodore Ts'o es->s_flags |= 480823301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4809f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4810f99b2589STheodore Ts'o #else 4811bc98a42cSDavid Howells if (!sb_rdonly(sb)) 481223301410STheodore Ts'o es->s_flags |= 481323301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4814f99b2589STheodore Ts'o #endif 4815f99b2589STheodore Ts'o } 481623301410STheodore Ts'o } 4817ac27a0ecSDave Kleikamp 4818281b5995STheodore Ts'o /* Handle clustersize */ 4819281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4820ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4821281b5995STheodore Ts'o if (clustersize < blocksize) { 4822281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4823281b5995STheodore Ts'o "cluster size (%d) smaller than " 4824281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4825281b5995STheodore Ts'o goto failed_mount; 4826281b5995STheodore Ts'o } 4827281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4828281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4829281b5995STheodore Ts'o sbi->s_clusters_per_group = 4830281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4831281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4832281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4833281b5995STheodore Ts'o "#clusters per group too big: %lu", 4834281b5995STheodore Ts'o sbi->s_clusters_per_group); 4835281b5995STheodore Ts'o goto failed_mount; 4836281b5995STheodore Ts'o } 4837281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4838281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4839281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4840281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4841281b5995STheodore Ts'o sbi->s_blocks_per_group, 4842281b5995STheodore Ts'o sbi->s_clusters_per_group); 4843281b5995STheodore Ts'o goto failed_mount; 4844281b5995STheodore Ts'o } 4845281b5995STheodore Ts'o } else { 4846281b5995STheodore Ts'o if (clustersize != blocksize) { 4847bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4848bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4849bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4850bfe0a5f4STheodore Ts'o goto failed_mount; 4851281b5995STheodore Ts'o } 4852ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4854b31e1552SEric Sandeen "#blocks per group too big: %lu", 4855ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4856ac27a0ecSDave Kleikamp goto failed_mount; 4857ac27a0ecSDave Kleikamp } 4858281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4859281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4860281b5995STheodore Ts'o } 4861281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4862281b5995STheodore Ts'o 4863960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4864960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4865960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4866960fd856STheodore Ts'o 4867bf43d84bSEric Sandeen /* 4868bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4869bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4870bf43d84bSEric Sandeen */ 48715a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 487230ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 48735a9ae68aSDarrick J. Wong if (err) { 4874b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4875bf43d84bSEric Sandeen " too large to mount safely on this system"); 4876ac27a0ecSDave Kleikamp goto failed_mount; 4877ac27a0ecSDave Kleikamp } 4878ac27a0ecSDave Kleikamp 4879617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4880617ba13bSMingming Cao goto cantfind_ext4; 4881e7c95593SEric Sandeen 48820f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 48835513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 48840f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4885b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4886b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 48870f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 48880f2ddca6SFrom: Thiemo Nagel goto failed_mount; 48890f2ddca6SFrom: Thiemo Nagel } 48900f2ddca6SFrom: Thiemo Nagel 48914ec11028STheodore Ts'o /* 48924ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 48934ec11028STheodore Ts'o * of the filesystem. 48944ec11028STheodore Ts'o */ 48954ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4896b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4897b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4898e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 48994ec11028STheodore Ts'o ext4_blocks_count(es)); 4900e7c95593SEric Sandeen goto failed_mount; 4901e7c95593SEric Sandeen } 4902bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4903bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4904bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4905bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4906bfe0a5f4STheodore Ts'o goto failed_mount; 4907bfe0a5f4STheodore Ts'o } 4908bfe0a5f4STheodore Ts'o 4909bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4910bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4911bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4912bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 49134ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4914df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 49154ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4916df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 49174ec11028STheodore Ts'o ext4_blocks_count(es), 49184ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 49194ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 49204ec11028STheodore Ts'o goto failed_mount; 49214ec11028STheodore Ts'o } 4922bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4923fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4924fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 49259e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 49269e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 49279e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 49289e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 49299e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 49309e463084STheodore Ts'o ret = -EINVAL; 49319e463084STheodore Ts'o goto failed_mount; 49329e463084STheodore Ts'o } 4933617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4934617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 49353a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 49362ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 49373a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 49383a4b77cdSEryu Guan "first meta block group too large: %u " 49393a4b77cdSEryu Guan "(group descriptor block count %u)", 49403a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 49413a4b77cdSEryu Guan goto failed_mount; 49423a4b77cdSEryu Guan } 49433a4b77cdSEryu Guan } 49441d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 49451d0c3924STheodore Ts'o kvmalloc_array(db_count, 4946f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 49471d0c3924STheodore Ts'o GFP_KERNEL)); 4948ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4949b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 49502cde417dSTheodore Ts'o ret = -ENOMEM; 4951ac27a0ecSDave Kleikamp goto failed_mount; 4952ac27a0ecSDave Kleikamp } 4953ac27a0ecSDave Kleikamp 4954705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4955ac27a0ecSDave Kleikamp 495685c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 495785c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 495885c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 49595df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 496085c8f176SAndrew Perepechko } 496185c8f176SAndrew Perepechko 4962ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 49631d0c3924STheodore Ts'o struct buffer_head *bh; 49641d0c3924STheodore Ts'o 496570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 49668394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 49678394a6abSzhangyi (F) if (IS_ERR(bh)) { 4968b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4969b31e1552SEric Sandeen "can't read group descriptor %d", i); 4970ac27a0ecSDave Kleikamp db_count = i; 49718394a6abSzhangyi (F) ret = PTR_ERR(bh); 4972ac27a0ecSDave Kleikamp goto failed_mount2; 4973ac27a0ecSDave Kleikamp } 49741d0c3924STheodore Ts'o rcu_read_lock(); 49751d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 49761d0c3924STheodore Ts'o rcu_read_unlock(); 4977ac27a0ecSDave Kleikamp } 497844de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4979829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4980b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 49816a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4982f9ae9cf5STheodore Ts'o goto failed_mount2; 4983ac27a0ecSDave Kleikamp } 4984772cb7c8SJose R. Santos 4985235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4986c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4987c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 498804496411STao Ma 4989a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4990eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4991ce7e010aSTheodore Ts'o goto failed_mount3; 4992ce7e010aSTheodore Ts'o 4993c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 499467a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4995c9de560dSAlex Tomas 4996f9ae9cf5STheodore Ts'o /* 4997f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4998f9ae9cf5STheodore Ts'o */ 4999f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5000617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5001617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5002643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5003a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5004ffcc4182SEric Biggers #endif 5005c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5006c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5007c93d8f88SEric Biggers #endif 5008ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5009617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5010e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 50111fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5012262b4662SJan Kara else 5013262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5014689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5015ac27a0ecSDave Kleikamp #endif 501685787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5017f2fa2ffcSAneesh Kumar K.V 5018ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 50193b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5020ac27a0ecSDave Kleikamp 5021aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5022aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5023aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5024aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5025aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5026aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5027aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 50289b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 5029e85c81baSXin Yin sbi->s_fc_ineligible_tid = 0; 5030aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5031aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 50328016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 50338016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 50348016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 50358016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 50368016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 50378016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 50388016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5039aa75f4d3SHarshad Shirwadkar 5040ac27a0ecSDave Kleikamp sb->s_root = NULL; 5041ac27a0ecSDave Kleikamp 5042ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 504302f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5044e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5045ac27a0ecSDave Kleikamp 5046bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5047c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 504850460fe8SDarrick J. Wong goto failed_mount3a; 5049c5e06d10SJohann Lombardi 5050ac27a0ecSDave Kleikamp /* 5051ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5052ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5053ac27a0ecSDave Kleikamp */ 5054e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 50557edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 50564753d8a2STheodore Ts'o if (err) 505750460fe8SDarrick J. Wong goto failed_mount3a; 5058bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5059e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5060b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5061b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5062744692dcSJiaying Zhang goto failed_mount_wq; 5063ac27a0ecSDave Kleikamp } else { 50641e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 50651e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 50661e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50671e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 50681e381f60SDmitry Monakhov goto failed_mount_wq; 50691e381f60SDmitry Monakhov } 50701e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 50711e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50721e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 50731e381f60SDmitry Monakhov goto failed_mount_wq; 50741e381f60SDmitry Monakhov } 50751e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 50761e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50771e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 50781e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 50791e381f60SDmitry Monakhov goto failed_mount_wq; 50801e381f60SDmitry Monakhov } 50811e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 50821e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 50831e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50841e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 50851e381f60SDmitry Monakhov goto failed_mount_wq; 50861e381f60SDmitry Monakhov } 508750b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 50881e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5089fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5090995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 50910390131bSFrank Mayhar sbi->s_journal = NULL; 50920390131bSFrank Mayhar needs_recovery = 0; 50930390131bSFrank Mayhar goto no_journal; 5094ac27a0ecSDave Kleikamp } 5095ac27a0ecSDave Kleikamp 5096e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5097eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5098eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5099b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5100744692dcSJiaying Zhang goto failed_mount_wq; 5101eb40a09cSJose R. Santos } 5102eb40a09cSJose R. Santos 510325ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 510425ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 510525ed6e8aSDarrick J. Wong "feature set"); 510625ed6e8aSDarrick J. Wong goto failed_mount_wq; 5107d4da6c9cSLinus Torvalds } 5108818d276cSGirish Shilamkar 5109a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5110a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5111a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5112a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5113a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5114a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5115a1e5e465SHarshad Shirwadkar } 5116a1e5e465SHarshad Shirwadkar 5117ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5118ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5119ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5120ac27a0ecSDave Kleikamp case 0: 5121ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 512263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 512363f57933SAndrew Morton * cope, else JOURNAL_DATA 512463f57933SAndrew Morton */ 5125dab291afSMingming Cao if (jbd2_journal_check_available_features 512627f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5127fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 512827f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 512927f394a7STyson Nottingham } else { 5130fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 513127f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 513227f394a7STyson Nottingham } 5133ac27a0ecSDave Kleikamp break; 5134ac27a0ecSDave Kleikamp 5135617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5136617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5137dab291afSMingming Cao if (!jbd2_journal_check_available_features 5138dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5139b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5140b31e1552SEric Sandeen "requested data journaling mode"); 5141744692dcSJiaying Zhang goto failed_mount_wq; 5142ac27a0ecSDave Kleikamp } 51435a150bdeSGustavo A. R. Silva break; 5144ac27a0ecSDave Kleikamp default: 5145ac27a0ecSDave Kleikamp break; 5146ac27a0ecSDave Kleikamp } 5147ab04df78SJan Kara 5148ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5149ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5150ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5151ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5152ab04df78SJan Kara goto failed_mount_wq; 5153ab04df78SJan Kara } 5154ab04df78SJan Kara 51557edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5156ac27a0ecSDave Kleikamp 5157342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5158afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5159342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5160afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 516118aadd47SBobi Jam 5162ce7e010aSTheodore Ts'o no_journal: 5163cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 516447387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 516547387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5166cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5167cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 51689c191f70ST Makphaibulchoke goto failed_mount_wq; 51699c191f70ST Makphaibulchoke } 51709c191f70ST Makphaibulchoke 5171dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5172dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5173dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5174dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5175dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5176dec214d0STahsin Erdogan goto failed_mount_wq; 5177dec214d0STahsin Erdogan } 5178dec214d0STahsin Erdogan } 5179cdb7ee4cSTahsin Erdogan } 5180dec214d0STahsin Erdogan 5181c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5182c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5183c93d8f88SEric Biggers goto failed_mount_wq; 5184c93d8f88SEric Biggers } 5185c93d8f88SEric Biggers 5186fd89d5f2STejun Heo /* 5187952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5188952fc18eSTheodore Ts'o * superblock if present. 5189952fc18eSTheodore Ts'o */ 5190952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 519185d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 519285d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 519385d825dbSTheodore Ts'o sbi->s_overhead = 0; 519485d825dbSTheodore Ts'o /* 519585d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 519685d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 519785d825dbSTheodore Ts'o * it to make sure we are using the correct value. 519885d825dbSTheodore Ts'o */ 519985d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 520085d825dbSTheodore Ts'o sbi->s_overhead = 0; 520185d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 520207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 520307aa2ea1SLukas Czerner if (err) 5204952fc18eSTheodore Ts'o goto failed_mount_wq; 5205952fc18eSTheodore Ts'o } 5206952fc18eSTheodore Ts'o 5207952fc18eSTheodore Ts'o /* 5208fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5209fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5210fd89d5f2STejun Heo */ 52112e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 52122e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 52132e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 52142e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 521507aa2ea1SLukas Czerner ret = -ENOMEM; 52162e8fa54eSJan Kara goto failed_mount4; 52172e8fa54eSJan Kara } 52182e8fa54eSJan Kara 5219ac27a0ecSDave Kleikamp /* 5220dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5221ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5222ac27a0ecSDave Kleikamp */ 5223ac27a0ecSDave Kleikamp 52248a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 52251d1fe1eeSDavid Howells if (IS_ERR(root)) { 5226b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 52271d1fe1eeSDavid Howells ret = PTR_ERR(root); 522832a9bb57SManish Katiyar root = NULL; 5229ac27a0ecSDave Kleikamp goto failed_mount4; 5230ac27a0ecSDave Kleikamp } 5231ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5232b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 523394bf608aSAl Viro iput(root); 5234ac27a0ecSDave Kleikamp goto failed_mount4; 5235ac27a0ecSDave Kleikamp } 5236b886ee3eSGabriel Krisman Bertazi 523748fde701SAl Viro sb->s_root = d_make_root(root); 52381d1fe1eeSDavid Howells if (!sb->s_root) { 5239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 52401d1fe1eeSDavid Howells ret = -ENOMEM; 52411d1fe1eeSDavid Howells goto failed_mount4; 52421d1fe1eeSDavid Howells } 5243ac27a0ecSDave Kleikamp 5244c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5245c89128a0SJaegeuk Kim if (ret == -EROFS) { 52461751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5247c89128a0SJaegeuk Kim ret = 0; 5248c89128a0SJaegeuk Kim } else if (ret) 5249c89128a0SJaegeuk Kim goto failed_mount4a; 5250ef7f3835SKalpak Shah 5251b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 525227dd4385SLukas Czerner 52530f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 52546fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 52556fd058f7STheodore Ts'o if (err) { 5256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5257fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5258f9ae9cf5STheodore Ts'o goto failed_mount4a; 5259f9ae9cf5STheodore Ts'o } 52600f5bde1dSJan Kara } 52618016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5262f9ae9cf5STheodore Ts'o 5263f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5264196e402aSHarshad Shirwadkar 5265196e402aSHarshad Shirwadkar /* 5266196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5267196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5268196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5269196e402aSHarshad Shirwadkar */ 527027b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 527127b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5272196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 527327b38686SOjaswin Mujoo else 5274196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 527527b38686SOjaswin Mujoo } 5276196e402aSHarshad Shirwadkar 5277f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5278f9ae9cf5STheodore Ts'o if (err) { 5279f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5280f9ae9cf5STheodore Ts'o err); 5281dcf2d804STao Ma goto failed_mount5; 5282c2774d84SAneesh Kumar K.V } 5283c2774d84SAneesh Kumar K.V 5284027f14f5STheodore Ts'o /* 5285027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5286027f14f5STheodore Ts'o * mballoc is initialized 5287027f14f5STheodore Ts'o */ 5288027f14f5STheodore Ts'o if (sbi->s_journal) 5289027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5290027f14f5STheodore Ts'o ext4_journal_commit_callback; 5291027f14f5STheodore Ts'o 5292d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5293d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5294d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5295908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5296908c7f19STejun Heo GFP_KERNEL); 5297d5e03cbbSTheodore Ts'o if (!err) { 5298d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5299d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5300908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5301908c7f19STejun Heo GFP_KERNEL); 5302d5e03cbbSTheodore Ts'o } 5303d5e03cbbSTheodore Ts'o if (!err) 5304d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5305908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5306d5e03cbbSTheodore Ts'o if (!err) 5307908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5308908c7f19STejun Heo GFP_KERNEL); 5309c8585c6fSDaeho Jeong if (!err) 5310efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5311efc61345SEric Whitney GFP_KERNEL); 5312efc61345SEric Whitney if (!err) 5313bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5314c8585c6fSDaeho Jeong 5315d5e03cbbSTheodore Ts'o if (err) { 5316d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5317d5e03cbbSTheodore Ts'o goto failed_mount6; 5318d5e03cbbSTheodore Ts'o } 5319d5e03cbbSTheodore Ts'o 5320e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5321d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5322d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5323d5e03cbbSTheodore Ts'o "unable to initialize " 5324d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 53258f6840c4SYang Yingliang ret = -ENOMEM; 5326d5e03cbbSTheodore Ts'o goto failed_mount6; 5327d5e03cbbSTheodore Ts'o } 5328d5e03cbbSTheodore Ts'o 5329bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5330bfff6873SLukas Czerner if (err) 5331dcf2d804STao Ma goto failed_mount6; 5332bfff6873SLukas Czerner 5333b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5334dcf2d804STao Ma if (err) 5335dcf2d804STao Ma goto failed_mount7; 53363197ebdbSTheodore Ts'o 533702f310fcSJan Kara err = ext4_init_orphan_info(sb); 533802f310fcSJan Kara if (err) 533902f310fcSJan Kara goto failed_mount8; 53409b2ff357SJan Kara #ifdef CONFIG_QUOTA 53419b2ff357SJan Kara /* Enable quota usage during mount. */ 5342bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 53439b2ff357SJan Kara err = ext4_enable_quotas(sb); 53449b2ff357SJan Kara if (err) 534502f310fcSJan Kara goto failed_mount9; 53469b2ff357SJan Kara } 53479b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 53489b2ff357SJan Kara 5349bc71726cSzhangyi (F) /* 5350bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5351bc71726cSzhangyi (F) * used to detect the metadata async write error. 5352bc71726cSzhangyi (F) */ 5353bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5354bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5355bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5356bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5357617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5358617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5359617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 53609b6641ddSYe Bin /* 53619b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 53629b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 53639b6641ddSYe Bin * checksum in the buffer cache until it is written out and 53649b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 53659b6641ddSYe Bin * after it is mounted can fail. 53669b6641ddSYe Bin */ 53679b6641ddSYe Bin ext4_superblock_csum_set(sb); 53680390131bSFrank Mayhar if (needs_recovery) { 5369b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 537011215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 537111215630SJan Kara if (err) 537202f310fcSJan Kara goto failed_mount9; 53730390131bSFrank Mayhar } 53740390131bSFrank Mayhar 537570200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 537679add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 537770200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 537879add3a3SLukas Czerner 537966e61a9eSTheodore Ts'o if (es->s_error_count) 538066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5381ac27a0ecSDave Kleikamp 5382efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5383efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5384efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5385efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 53861cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 53871cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5388efbed4dcSTheodore Ts'o 5389ac27a0ecSDave Kleikamp return 0; 5390ac27a0ecSDave Kleikamp 5391617ba13bSMingming Cao cantfind_ext4: 5392ac27a0ecSDave Kleikamp if (!silent) 5393b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5394ac27a0ecSDave Kleikamp goto failed_mount; 5395ac27a0ecSDave Kleikamp 539602f310fcSJan Kara failed_mount9: 539702f310fcSJan Kara ext4_release_orphan_info(sb); 539872ba7450STheodore Ts'o failed_mount8: 5399ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5400cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5401dcf2d804STao Ma failed_mount7: 5402dcf2d804STao Ma ext4_unregister_li_request(sb); 5403dcf2d804STao Ma failed_mount6: 5404f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 54057c990728SSuraj Jitindar Singh rcu_read_lock(); 54067c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 54077c990728SSuraj Jitindar Singh if (flex_groups) { 54087c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 54097c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 54107c990728SSuraj Jitindar Singh kvfree(flex_groups); 54117c990728SSuraj Jitindar Singh } 54127c990728SSuraj Jitindar Singh rcu_read_unlock(); 5413d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5414d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5415d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5416d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5417efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5418bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 541900764937SAzat Khuzhin failed_mount5: 5420f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5421f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5422f9ae9cf5STheodore Ts'o failed_mount4a: 542394bf608aSAl Viro dput(sb->s_root); 542432a9bb57SManish Katiyar sb->s_root = NULL; 542594bf608aSAl Viro failed_mount4: 5426b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 54272e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 54282e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 54294c0425ffSMingming Cao failed_mount_wq: 5430dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5431dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 543250c15df6SChengguang Xu 543347387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 543447387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 543550c15df6SChengguang Xu 54360390131bSFrank Mayhar if (sbi->s_journal) { 5437bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5438bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5439dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 544047b4a50bSJan Kara sbi->s_journal = NULL; 54410390131bSFrank Mayhar } 544250460fe8SDarrick J. Wong failed_mount3a: 5443d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5444eb68d0e2SZheng Liu failed_mount3: 5445bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5446c92dc856SJan Kara flush_work(&sbi->s_error_work); 54472a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5448618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5449ac27a0ecSDave Kleikamp failed_mount2: 54501d0c3924STheodore Ts'o rcu_read_lock(); 54511d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5452ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 54531d0c3924STheodore Ts'o brelse(group_desc[i]); 54541d0c3924STheodore Ts'o kvfree(group_desc); 54551d0c3924STheodore Ts'o rcu_read_unlock(); 5456ac27a0ecSDave Kleikamp failed_mount: 54570441984aSDarrick J. Wong if (sbi->s_chksum_driver) 54580441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5459c83ad55eSGabriel Krisman Bertazi 54605298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5461f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5462c83ad55eSGabriel Krisman Bertazi #endif 5463c83ad55eSGabriel Krisman Bertazi 5464ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5465a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 54660ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5467ac27a0ecSDave Kleikamp #endif 5468ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5469afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5470ac27a0ecSDave Kleikamp brelse(bh); 5471afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5472ac27a0ecSDave Kleikamp out_fail: 5473ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 547407aa2ea1SLukas Czerner return err ? err : ret; 5475ac27a0ecSDave Kleikamp } 5476ac27a0ecSDave Kleikamp 5477cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 54787edfd85bSLukas Czerner { 5479cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 54807edfd85bSLukas Czerner struct ext4_sb_info *sbi; 54817edfd85bSLukas Czerner const char *descr; 5482cebe85d5SLukas Czerner int ret; 54837edfd85bSLukas Czerner 5484cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5485cebe85d5SLukas Czerner if (!sbi) 54867c268d4cSLukas Czerner return -ENOMEM; 5487cebe85d5SLukas Czerner 5488cebe85d5SLukas Czerner fc->s_fs_info = sbi; 54897edfd85bSLukas Czerner 54907edfd85bSLukas Czerner /* Cleanup superblock name */ 54917edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 54927edfd85bSLukas Czerner 54937edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5494cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5495cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 54967edfd85bSLukas Czerner 5497960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 54987edfd85bSLukas Czerner if (ret < 0) 54997edfd85bSLukas Czerner goto free_sbi; 55007edfd85bSLukas Czerner 5501cebe85d5SLukas Czerner if (sbi->s_journal) { 55027edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 55037edfd85bSLukas Czerner descr = " journalled data mode"; 55047edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 55057edfd85bSLukas Czerner descr = " ordered data mode"; 55067edfd85bSLukas Czerner else 55077edfd85bSLukas Czerner descr = " writeback data mode"; 55087edfd85bSLukas Czerner } else 55097edfd85bSLukas Czerner descr = "out journal"; 55107edfd85bSLukas Czerner 55117edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 55127edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5513cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 55147edfd85bSLukas Czerner 5515eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5516827891a3STheodore Ts'o ext4_update_overhead(sb, false); 55177edfd85bSLukas Czerner return 0; 5518cebe85d5SLukas Czerner 55197edfd85bSLukas Czerner free_sbi: 55207edfd85bSLukas Czerner ext4_free_sbi(sbi); 5521cebe85d5SLukas Czerner fc->s_fs_info = NULL; 55227edfd85bSLukas Czerner return ret; 55237edfd85bSLukas Czerner } 55247edfd85bSLukas Czerner 5525cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5526cebe85d5SLukas Czerner { 5527cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5528cebe85d5SLukas Czerner } 5529cebe85d5SLukas Czerner 5530ac27a0ecSDave Kleikamp /* 5531ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5532ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5533ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5534ac27a0ecSDave Kleikamp */ 5535617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5536ac27a0ecSDave Kleikamp { 5537617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5538ac27a0ecSDave Kleikamp 5539ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 554030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 554130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 55426866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5543ac27a0ecSDave Kleikamp 5544a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5545ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5546dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5547ac27a0ecSDave Kleikamp else 5548dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 55495bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 55505bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 55515bf5683aSHidehiro Kawai else 55525bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5553a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5554ac27a0ecSDave Kleikamp } 5555ac27a0ecSDave Kleikamp 5556c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5557ac27a0ecSDave Kleikamp unsigned int journal_inum) 5558ac27a0ecSDave Kleikamp { 5559ac27a0ecSDave Kleikamp struct inode *journal_inode; 5560ac27a0ecSDave Kleikamp 5561c6cb7e77SEric Whitney /* 5562c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5563c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5564c6cb7e77SEric Whitney * will try to delete it. 5565c6cb7e77SEric Whitney */ 55668a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 55671d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5568b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5569ac27a0ecSDave Kleikamp return NULL; 5570ac27a0ecSDave Kleikamp } 5571ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5572ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5573ac27a0ecSDave Kleikamp iput(journal_inode); 5574b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5575ac27a0ecSDave Kleikamp return NULL; 5576ac27a0ecSDave Kleikamp } 5577ac27a0ecSDave Kleikamp 55784978c659SJan Kara ext4_debug("Journal inode found at %p: %lld bytes\n", 5579ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 55801d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5581b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5582ac27a0ecSDave Kleikamp iput(journal_inode); 5583ac27a0ecSDave Kleikamp return NULL; 5584ac27a0ecSDave Kleikamp } 5585c6cb7e77SEric Whitney return journal_inode; 5586c6cb7e77SEric Whitney } 5587c6cb7e77SEric Whitney 5588c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5589c6cb7e77SEric Whitney unsigned int journal_inum) 5590c6cb7e77SEric Whitney { 5591c6cb7e77SEric Whitney struct inode *journal_inode; 5592c6cb7e77SEric Whitney journal_t *journal; 5593c6cb7e77SEric Whitney 559411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 559511215630SJan Kara return NULL; 5596c6cb7e77SEric Whitney 5597c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5598c6cb7e77SEric Whitney if (!journal_inode) 5599c6cb7e77SEric Whitney return NULL; 5600ac27a0ecSDave Kleikamp 5601dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5602ac27a0ecSDave Kleikamp if (!journal) { 5603b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5604ac27a0ecSDave Kleikamp iput(journal_inode); 5605ac27a0ecSDave Kleikamp return NULL; 5606ac27a0ecSDave Kleikamp } 5607ac27a0ecSDave Kleikamp journal->j_private = sb; 5608617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5609ac27a0ecSDave Kleikamp return journal; 5610ac27a0ecSDave Kleikamp } 5611ac27a0ecSDave Kleikamp 5612617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5613ac27a0ecSDave Kleikamp dev_t j_dev) 5614ac27a0ecSDave Kleikamp { 5615ac27a0ecSDave Kleikamp struct buffer_head *bh; 5616ac27a0ecSDave Kleikamp journal_t *journal; 5617617ba13bSMingming Cao ext4_fsblk_t start; 5618617ba13bSMingming Cao ext4_fsblk_t len; 5619ac27a0ecSDave Kleikamp int hblock, blocksize; 5620617ba13bSMingming Cao ext4_fsblk_t sb_block; 5621ac27a0ecSDave Kleikamp unsigned long offset; 5622617ba13bSMingming Cao struct ext4_super_block *es; 5623ac27a0ecSDave Kleikamp struct block_device *bdev; 5624ac27a0ecSDave Kleikamp 562511215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 562611215630SJan Kara return NULL; 56270390131bSFrank Mayhar 5628b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5629ac27a0ecSDave Kleikamp if (bdev == NULL) 5630ac27a0ecSDave Kleikamp return NULL; 5631ac27a0ecSDave Kleikamp 5632ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5633e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5634ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5635b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5636b31e1552SEric Sandeen "blocksize too small for journal device"); 5637ac27a0ecSDave Kleikamp goto out_bdev; 5638ac27a0ecSDave Kleikamp } 5639ac27a0ecSDave Kleikamp 5640617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5641617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5642ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5643ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5644b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5645b31e1552SEric Sandeen "external journal"); 5646ac27a0ecSDave Kleikamp goto out_bdev; 5647ac27a0ecSDave Kleikamp } 5648ac27a0ecSDave Kleikamp 56492716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5650617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5651ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5652617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5654b31e1552SEric Sandeen "bad superblock"); 5655ac27a0ecSDave Kleikamp brelse(bh); 5656ac27a0ecSDave Kleikamp goto out_bdev; 5657ac27a0ecSDave Kleikamp } 5658ac27a0ecSDave Kleikamp 5659df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5660df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5661df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5662df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5663df4763beSDarrick J. Wong "corrupt superblock"); 5664df4763beSDarrick J. Wong brelse(bh); 5665df4763beSDarrick J. Wong goto out_bdev; 5666df4763beSDarrick J. Wong } 5667df4763beSDarrick J. Wong 5668617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5669b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5670ac27a0ecSDave Kleikamp brelse(bh); 5671ac27a0ecSDave Kleikamp goto out_bdev; 5672ac27a0ecSDave Kleikamp } 5673ac27a0ecSDave Kleikamp 5674bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5675ac27a0ecSDave Kleikamp start = sb_block + 1; 5676ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5677ac27a0ecSDave Kleikamp 5678dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5679ac27a0ecSDave Kleikamp start, len, blocksize); 5680ac27a0ecSDave Kleikamp if (!journal) { 5681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5682ac27a0ecSDave Kleikamp goto out_bdev; 5683ac27a0ecSDave Kleikamp } 5684ac27a0ecSDave Kleikamp journal->j_private = sb; 56852d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5686b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5687ac27a0ecSDave Kleikamp goto out_journal; 5688ac27a0ecSDave Kleikamp } 5689ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5691b31e1552SEric Sandeen "user (unsupported) - %d", 5692ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5693ac27a0ecSDave Kleikamp goto out_journal; 5694ac27a0ecSDave Kleikamp } 5695ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5696617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5697ac27a0ecSDave Kleikamp return journal; 56980b8e58a1SAndreas Dilger 5699ac27a0ecSDave Kleikamp out_journal: 5700dab291afSMingming Cao jbd2_journal_destroy(journal); 5701ac27a0ecSDave Kleikamp out_bdev: 5702617ba13bSMingming Cao ext4_blkdev_put(bdev); 5703ac27a0ecSDave Kleikamp return NULL; 5704ac27a0ecSDave Kleikamp } 5705ac27a0ecSDave Kleikamp 5706617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5707617ba13bSMingming Cao struct ext4_super_block *es, 5708ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5709ac27a0ecSDave Kleikamp { 5710ac27a0ecSDave Kleikamp journal_t *journal; 5711ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5712ac27a0ecSDave Kleikamp dev_t journal_dev; 5713ac27a0ecSDave Kleikamp int err = 0; 5714ac27a0ecSDave Kleikamp int really_read_only; 5715273108faSLukas Czerner int journal_dev_ro; 5716ac27a0ecSDave Kleikamp 571711215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 571811215630SJan Kara return -EFSCORRUPTED; 57190390131bSFrank Mayhar 5720ac27a0ecSDave Kleikamp if (journal_devnum && 5721ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5722b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5723b31e1552SEric Sandeen "numbers have changed"); 5724ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5725ac27a0ecSDave Kleikamp } else 5726ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5727ac27a0ecSDave Kleikamp 5728273108faSLukas Czerner if (journal_inum && journal_dev) { 5729273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5730273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5731273108faSLukas Czerner return -EINVAL; 5732273108faSLukas Czerner } 5733273108faSLukas Czerner 5734273108faSLukas Czerner if (journal_inum) { 5735273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5736273108faSLukas Czerner if (!journal) 5737273108faSLukas Czerner return -EINVAL; 5738273108faSLukas Czerner } else { 5739273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5740273108faSLukas Czerner if (!journal) 5741273108faSLukas Czerner return -EINVAL; 5742273108faSLukas Czerner } 5743273108faSLukas Czerner 5744273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5745273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5746273108faSLukas Czerner 5747273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5748273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5749273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5750273108faSLukas Czerner err = -EROFS; 5751273108faSLukas Czerner goto err_out; 5752273108faSLukas Czerner } 5753ac27a0ecSDave Kleikamp 5754ac27a0ecSDave Kleikamp /* 5755ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5756ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5757ac27a0ecSDave Kleikamp * can get read-write access to the device. 5758ac27a0ecSDave Kleikamp */ 5759e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5760bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5761b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5762b31e1552SEric Sandeen "required on readonly filesystem"); 5763ac27a0ecSDave Kleikamp if (really_read_only) { 5764b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5765d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5766d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5767273108faSLukas Czerner err = -EROFS; 5768273108faSLukas Czerner goto err_out; 5769ac27a0ecSDave Kleikamp } 5770b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5771b31e1552SEric Sandeen "be enabled during recovery"); 5772ac27a0ecSDave Kleikamp } 5773ac27a0ecSDave Kleikamp } 5774ac27a0ecSDave Kleikamp 577590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5776b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 57774776004fSTheodore Ts'o 5778e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5779dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 57801c13d5c0STheodore Ts'o if (!err) { 57811c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 57821c13d5c0STheodore Ts'o if (save) 57831c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 57841c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5785dab291afSMingming Cao err = jbd2_journal_load(journal); 57861c13d5c0STheodore Ts'o if (save) 57871c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 57881c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 57891c13d5c0STheodore Ts'o kfree(save); 57901c13d5c0STheodore Ts'o } 5791ac27a0ecSDave Kleikamp 5792ac27a0ecSDave Kleikamp if (err) { 5793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5794273108faSLukas Czerner goto err_out; 5795ac27a0ecSDave Kleikamp } 5796ac27a0ecSDave Kleikamp 5797617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 579811215630SJan Kara err = ext4_clear_journal_err(sb, es); 579911215630SJan Kara if (err) { 580011215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 580111215630SJan Kara jbd2_journal_destroy(journal); 580211215630SJan Kara return err; 580311215630SJan Kara } 5804ac27a0ecSDave Kleikamp 5805c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5806ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5807ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5808ac27a0ecSDave Kleikamp 5809ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 58104392fbc4SJan Kara ext4_commit_super(sb); 5811ac27a0ecSDave Kleikamp } 5812ac27a0ecSDave Kleikamp 5813ac27a0ecSDave Kleikamp return 0; 5814273108faSLukas Czerner 5815273108faSLukas Czerner err_out: 5816273108faSLukas Czerner jbd2_journal_destroy(journal); 5817273108faSLukas Czerner return err; 5818ac27a0ecSDave Kleikamp } 5819ac27a0ecSDave Kleikamp 58202d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 58212d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5822ac27a0ecSDave Kleikamp { 5823c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5824e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5825e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5826ac27a0ecSDave Kleikamp 582705c2c00fSJan Kara lock_buffer(sbh); 5828a17712c8SJon Derrick /* 582971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 583071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 583171290b36STheodore Ts'o * write time when we are mounting the root file system 583271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 583371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 583471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 583571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 583671290b36STheodore Ts'o * to complain and force a full file system check. 583771290b36STheodore Ts'o */ 58381751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 58396a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5840afc32f7eSTheodore Ts'o es->s_kbytes_written = 5841e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 58428446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5843e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5844e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 584557042651STheodore Ts'o ext4_free_blocks_count_set(es, 5846e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5847e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5848e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 58497f93cff9STheodore Ts'o es->s_free_inodes_count = 58507f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5851e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5852c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5853c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5854c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5855c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5856c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5857c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5858c92dc856SJan Kara &es->s_first_error_time_hi, 5859c92dc856SJan Kara sbi->s_first_error_time); 5860c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5861c92dc856SJan Kara sizeof(es->s_first_error_func)); 5862c92dc856SJan Kara es->s_first_error_line = 5863c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5864c92dc856SJan Kara es->s_first_error_ino = 5865c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5866c92dc856SJan Kara es->s_first_error_block = 5867c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5868c92dc856SJan Kara es->s_first_error_errcode = 5869c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5870c92dc856SJan Kara } 5871c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5872c92dc856SJan Kara &es->s_last_error_time_hi, 5873c92dc856SJan Kara sbi->s_last_error_time); 5874c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5875c92dc856SJan Kara sizeof(es->s_last_error_func)); 5876c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5877c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5878c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5879c92dc856SJan Kara es->s_last_error_errcode = 5880c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5881c92dc856SJan Kara /* 5882c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5883c92dc856SJan Kara * started already 5884c92dc856SJan Kara */ 5885c92dc856SJan Kara if (!es->s_error_count) 5886c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5887c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5888c92dc856SJan Kara sbi->s_add_error_count = 0; 5889c92dc856SJan Kara } 5890c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5891c92dc856SJan Kara 589206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 58932d01ddc8SJan Kara unlock_buffer(sbh); 58942d01ddc8SJan Kara } 58952d01ddc8SJan Kara 58962d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 58972d01ddc8SJan Kara { 58982d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 58992d01ddc8SJan Kara 5900f88f1466SFengnan Chang if (!sbh) 5901f88f1466SFengnan Chang return -EINVAL; 5902f88f1466SFengnan Chang if (block_device_ejected(sb)) 5903f88f1466SFengnan Chang return -ENODEV; 59042d01ddc8SJan Kara 59052d01ddc8SJan Kara ext4_update_super(sb); 59062d01ddc8SJan Kara 590715baa7dcSZhang Yi lock_buffer(sbh); 590815baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 590915baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 591015baa7dcSZhang Yi unlock_buffer(sbh); 591115baa7dcSZhang Yi return -EIO; 591215baa7dcSZhang Yi } 591315baa7dcSZhang Yi 5914e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 59154743f839SPranay Kr. Srivastava /* 59164743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 59174743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 59184743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 59194743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 59204743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 59214743f839SPranay Kr. Srivastava * write and hope for the best. 59224743f839SPranay Kr. Srivastava */ 59234743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 59244743f839SPranay Kr. Srivastava "superblock detected"); 59254743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 59264743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 59274743f839SPranay Kr. Srivastava } 592815baa7dcSZhang Yi get_bh(sbh); 592915baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 593015baa7dcSZhang Yi clear_buffer_dirty(sbh); 593115baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 59321420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 59331420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 593415baa7dcSZhang Yi wait_on_buffer(sbh); 5935c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5936b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5937b31e1552SEric Sandeen "superblock"); 5938914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5939914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 594015baa7dcSZhang Yi return -EIO; 5941914258bfSTheodore Ts'o } 594215baa7dcSZhang Yi return 0; 5943ac27a0ecSDave Kleikamp } 5944ac27a0ecSDave Kleikamp 5945ac27a0ecSDave Kleikamp /* 5946ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5947ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5948ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5949ac27a0ecSDave Kleikamp */ 595011215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5951617ba13bSMingming Cao struct ext4_super_block *es) 5952ac27a0ecSDave Kleikamp { 595311215630SJan Kara int err; 5954617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5955ac27a0ecSDave Kleikamp 5956e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 595711215630SJan Kara if (journal != NULL) { 595811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 595911215630SJan Kara "mounted!"); 596011215630SJan Kara return -EFSCORRUPTED; 596111215630SJan Kara } 596211215630SJan Kara return 0; 59630390131bSFrank Mayhar } 5964dab291afSMingming Cao jbd2_journal_lock_updates(journal); 596501d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 596611215630SJan Kara if (err < 0) 59677ffe1ea8SHidehiro Kawai goto out; 59687ffe1ea8SHidehiro Kawai 596902f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 597002f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 597102f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 597202f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 597302f310fcSJan Kara err = -EFSCORRUPTED; 597402f310fcSJan Kara goto out; 597502f310fcSJan Kara } 5976e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 597702f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 59784392fbc4SJan Kara ext4_commit_super(sb); 5979ac27a0ecSDave Kleikamp } 59807ffe1ea8SHidehiro Kawai out: 5981dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 598211215630SJan Kara return err; 5983ac27a0ecSDave Kleikamp } 5984ac27a0ecSDave Kleikamp 5985ac27a0ecSDave Kleikamp /* 5986ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5987ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5988ac27a0ecSDave Kleikamp * main filesystem now. 5989ac27a0ecSDave Kleikamp */ 599011215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5991617ba13bSMingming Cao struct ext4_super_block *es) 5992ac27a0ecSDave Kleikamp { 5993ac27a0ecSDave Kleikamp journal_t *journal; 5994ac27a0ecSDave Kleikamp int j_errno; 5995ac27a0ecSDave Kleikamp const char *errstr; 5996ac27a0ecSDave Kleikamp 599711215630SJan Kara if (!ext4_has_feature_journal(sb)) { 599811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 599911215630SJan Kara return -EFSCORRUPTED; 600011215630SJan Kara } 60010390131bSFrank Mayhar 6002617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6003ac27a0ecSDave Kleikamp 6004ac27a0ecSDave Kleikamp /* 6005ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6006617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6007ac27a0ecSDave Kleikamp */ 6008ac27a0ecSDave Kleikamp 6009dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6010ac27a0ecSDave Kleikamp if (j_errno) { 6011ac27a0ecSDave Kleikamp char nbuf[16]; 6012ac27a0ecSDave Kleikamp 6013617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 601412062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6015ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 601612062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6017ac27a0ecSDave Kleikamp 6018617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6019617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 60204392fbc4SJan Kara ext4_commit_super(sb); 6021ac27a0ecSDave Kleikamp 6022dab291afSMingming Cao jbd2_journal_clear_err(journal); 6023d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6024ac27a0ecSDave Kleikamp } 602511215630SJan Kara return 0; 6026ac27a0ecSDave Kleikamp } 6027ac27a0ecSDave Kleikamp 6028ac27a0ecSDave Kleikamp /* 6029ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6030ac27a0ecSDave Kleikamp * and wait on the commit. 6031ac27a0ecSDave Kleikamp */ 6032617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6033ac27a0ecSDave Kleikamp { 6034ac27a0ecSDave Kleikamp journal_t *journal; 6035ac27a0ecSDave Kleikamp 6036bc98a42cSDavid Howells if (sb_rdonly(sb)) 6037ac27a0ecSDave Kleikamp return 0; 6038ac27a0ecSDave Kleikamp 6039617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6040b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6041ac27a0ecSDave Kleikamp } 6042ac27a0ecSDave Kleikamp 6043617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6044ac27a0ecSDave Kleikamp { 604514ce0cb4STheodore Ts'o int ret = 0; 60469eddacf9SJan Kara tid_t target; 604706a407f1SDmitry Monakhov bool needs_barrier = false; 60488d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6049ac27a0ecSDave Kleikamp 605049598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 60510db1ff22STheodore Ts'o return 0; 60520db1ff22STheodore Ts'o 60539bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 60542e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6055a1177825SJan Kara /* 6056a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6057a1177825SJan Kara * no dirty dquots 6058a1177825SJan Kara */ 6059a1177825SJan Kara dquot_writeback_dquots(sb, -1); 606006a407f1SDmitry Monakhov /* 606106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 606206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 606306a407f1SDmitry Monakhov * transaction_commit will do it for us. 606406a407f1SDmitry Monakhov */ 6065bda32530STheodore Ts'o if (sbi->s_journal) { 606606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 606706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 606806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 606906a407f1SDmitry Monakhov needs_barrier = true; 607006a407f1SDmitry Monakhov 60718d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6072ac27a0ecSDave Kleikamp if (wait) 6073bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6074bda32530STheodore Ts'o target); 60750390131bSFrank Mayhar } 6076bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6077bda32530STheodore Ts'o needs_barrier = true; 607806a407f1SDmitry Monakhov if (needs_barrier) { 607906a407f1SDmitry Monakhov int err; 6080c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 608106a407f1SDmitry Monakhov if (!ret) 608206a407f1SDmitry Monakhov ret = err; 608306a407f1SDmitry Monakhov } 608406a407f1SDmitry Monakhov 608506a407f1SDmitry Monakhov return ret; 608606a407f1SDmitry Monakhov } 608706a407f1SDmitry Monakhov 6088ac27a0ecSDave Kleikamp /* 6089ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6090ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6091be4f27d3SYongqiang Yang * 6092be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 60938e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 60948e8ad8a5SJan Kara * modifications. 6095ac27a0ecSDave Kleikamp */ 6096c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6097ac27a0ecSDave Kleikamp { 6098c4be0c1dSTakashi Sato int error = 0; 6099c4be0c1dSTakashi Sato journal_t *journal; 6100ac27a0ecSDave Kleikamp 6101bc98a42cSDavid Howells if (sb_rdonly(sb)) 61029ca92389STheodore Ts'o return 0; 61039ca92389STheodore Ts'o 6104c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6105ac27a0ecSDave Kleikamp 6106bb044576STheodore Ts'o if (journal) { 6107ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6108dab291afSMingming Cao jbd2_journal_lock_updates(journal); 61097ffe1ea8SHidehiro Kawai 61107ffe1ea8SHidehiro Kawai /* 6111bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6112bb044576STheodore Ts'o * flush the journal. 61137ffe1ea8SHidehiro Kawai */ 611401d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 61156b0310fbSEric Sandeen if (error < 0) 61166b0310fbSEric Sandeen goto out; 6117ac27a0ecSDave Kleikamp 6118ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6119e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 612002f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 612102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6122c642dc9eSEric Sandeen } 6123c642dc9eSEric Sandeen 61244392fbc4SJan Kara error = ext4_commit_super(sb); 61256b0310fbSEric Sandeen out: 6126bb044576STheodore Ts'o if (journal) 61278e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6128bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 61296b0310fbSEric Sandeen return error; 6130ac27a0ecSDave Kleikamp } 6131ac27a0ecSDave Kleikamp 6132ac27a0ecSDave Kleikamp /* 6133ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6134ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6135ac27a0ecSDave Kleikamp */ 6136c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6137ac27a0ecSDave Kleikamp { 6138bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 61399ca92389STheodore Ts'o return 0; 61409ca92389STheodore Ts'o 6141c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 61429ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6143e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 614402f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 614502f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6146c642dc9eSEric Sandeen } 6147c642dc9eSEric Sandeen 61484392fbc4SJan Kara ext4_commit_super(sb); 6149c4be0c1dSTakashi Sato return 0; 6150ac27a0ecSDave Kleikamp } 6151ac27a0ecSDave Kleikamp 6152673c6100STheodore Ts'o /* 6153673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6154673c6100STheodore Ts'o */ 6155673c6100STheodore Ts'o struct ext4_mount_options { 6156673c6100STheodore Ts'o unsigned long s_mount_opt; 6157a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 615808cefc7aSEric W. Biederman kuid_t s_resuid; 615908cefc7aSEric W. Biederman kgid_t s_resgid; 6160673c6100STheodore Ts'o unsigned long s_commit_interval; 6161673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6162673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6163673c6100STheodore Ts'o int s_jquota_fmt; 6164a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6165673c6100STheodore Ts'o #endif 6166673c6100STheodore Ts'o }; 6167673c6100STheodore Ts'o 6168960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6169ac27a0ecSDave Kleikamp { 61707edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6171617ba13bSMingming Cao struct ext4_super_block *es; 6172617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6173960e0ab6SLukas Czerner unsigned long old_sb_flags; 6174617ba13bSMingming Cao struct ext4_mount_options old_opts; 61758a266467STheodore Ts'o ext4_group_t g; 6176c5e06d10SJohann Lombardi int err = 0; 6177ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 61783bbef91bSAustin Kim int enable_quota = 0; 617903dafb5fSChen Gang int i, j; 618033458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6181ac27a0ecSDave Kleikamp #endif 6182b237e304SHarshad Shirwadkar 618321ac738eSChengguang Xu 6184ac27a0ecSDave Kleikamp /* Store the original options */ 6185ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6186ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6187a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6188ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6189ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6190ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 619130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 619230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6193ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6194ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6195a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 619603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 619733458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 619833458eabSTheodore Ts'o 619933458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 620003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 620103dafb5fSChen Gang for (j = 0; j < i; j++) 620203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 620303dafb5fSChen Gang return -ENOMEM; 620403dafb5fSChen Gang } 620503dafb5fSChen Gang } else 620603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6207ac27a0ecSDave Kleikamp #endif 6208e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6209b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 62107edfd85bSLukas Czerner ctx->journal_ioprio = 6211b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6212e4e58e5dSOjaswin Mujoo else 6213e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6214e4e58e5dSOjaswin Mujoo 6215e4e58e5dSOjaswin Mujoo } 6216ac27a0ecSDave Kleikamp 62177edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6218ac27a0ecSDave Kleikamp 62196b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 62206b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 62216b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 62222d5b86e0SEric Sandeen "during remount not supported; ignoring"); 62232d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6224c6d3d56dSDarrick J. Wong } 6225c6d3d56dSDarrick J. Wong 62266ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 62276ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 62286ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62296ae6514bSPiotr Sarna "both data=journal and delalloc"); 62306ae6514bSPiotr Sarna err = -EINVAL; 62316ae6514bSPiotr Sarna goto restore_opts; 62326ae6514bSPiotr Sarna } 62336ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 62346ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62356ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 62366ae6514bSPiotr Sarna err = -EINVAL; 62376ae6514bSPiotr Sarna goto restore_opts; 62386ae6514bSPiotr Sarna } 6239ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6240ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6241ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6242ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6243ab04df78SJan Kara err = -EINVAL; 6244ab04df78SJan Kara goto restore_opts; 6245ab04df78SJan Kara } 6246923ae0ffSRoss Zwisler } 6247923ae0ffSRoss Zwisler 6248cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6249cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6250cdb7ee4cSTahsin Erdogan err = -EINVAL; 6251cdb7ee4cSTahsin Erdogan goto restore_opts; 6252cdb7ee4cSTahsin Erdogan } 6253cdb7ee4cSTahsin Erdogan 62549b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6255124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6256ac27a0ecSDave Kleikamp 62571751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 62581751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6259ac27a0ecSDave Kleikamp 6260ac27a0ecSDave Kleikamp es = sbi->s_es; 6261ac27a0ecSDave Kleikamp 6262b3881f74STheodore Ts'o if (sbi->s_journal) { 6263617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 62647edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6265b3881f74STheodore Ts'o } 6266ac27a0ecSDave Kleikamp 6267c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6268c92dc856SJan Kara flush_work(&sbi->s_error_work); 6269c92dc856SJan Kara 6270960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 62719b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6272ac27a0ecSDave Kleikamp err = -EROFS; 6273ac27a0ecSDave Kleikamp goto restore_opts; 6274ac27a0ecSDave Kleikamp } 6275ac27a0ecSDave Kleikamp 6276960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 627738c03b34STheodore Ts'o err = sync_filesystem(sb); 627838c03b34STheodore Ts'o if (err < 0) 627938c03b34STheodore Ts'o goto restore_opts; 62800f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 62810f0dd62fSChristoph Hellwig if (err < 0) 6282c79d967dSChristoph Hellwig goto restore_opts; 6283c79d967dSChristoph Hellwig 6284ac27a0ecSDave Kleikamp /* 6285ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6286ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6287ac27a0ecSDave Kleikamp */ 62881751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6289ac27a0ecSDave Kleikamp 6290ac27a0ecSDave Kleikamp /* 6291ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6292ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6293ac27a0ecSDave Kleikamp * mark the partition as valid again. 6294ac27a0ecSDave Kleikamp */ 6295617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6296617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6297ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6298ac27a0ecSDave Kleikamp 629911215630SJan Kara if (sbi->s_journal) { 630011215630SJan Kara /* 630111215630SJan Kara * We let remount-ro finish even if marking fs 630211215630SJan Kara * as clean failed... 630311215630SJan Kara */ 6304617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 630511215630SJan Kara } 6306ac27a0ecSDave Kleikamp } else { 6307a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6308e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 63092cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6310ac27a0ecSDave Kleikamp err = -EROFS; 6311ac27a0ecSDave Kleikamp goto restore_opts; 6312ac27a0ecSDave Kleikamp } 6313ead6596bSEric Sandeen /* 63148a266467STheodore Ts'o * Make sure the group descriptor checksums 63150b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 63168a266467STheodore Ts'o */ 63178a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 63188a266467STheodore Ts'o struct ext4_group_desc *gdp = 63198a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 63208a266467STheodore Ts'o 6321feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6322b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6323b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6324e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 63258a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 63266a797d27SDarrick J. Wong err = -EFSBADCRC; 63278a266467STheodore Ts'o goto restore_opts; 63288a266467STheodore Ts'o } 63298a266467STheodore Ts'o } 63308a266467STheodore Ts'o 63318a266467STheodore Ts'o /* 6332ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6333ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6334ead6596bSEric Sandeen * require a full umount/remount for now. 6335ead6596bSEric Sandeen */ 633602f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6337b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6338ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6339ead6596bSEric Sandeen "orphan inode list. Please " 6340b31e1552SEric Sandeen "umount/remount instead"); 6341ead6596bSEric Sandeen err = -EINVAL; 6342ead6596bSEric Sandeen goto restore_opts; 6343ead6596bSEric Sandeen } 6344ead6596bSEric Sandeen 6345ac27a0ecSDave Kleikamp /* 6346ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6347ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6348ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6349ac27a0ecSDave Kleikamp * the partition.) 6350ac27a0ecSDave Kleikamp */ 635111215630SJan Kara if (sbi->s_journal) { 635211215630SJan Kara err = ext4_clear_journal_err(sb, es); 635311215630SJan Kara if (err) 635411215630SJan Kara goto restore_opts; 635511215630SJan Kara } 6356c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6357c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6358c89128a0SJaegeuk Kim 6359c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6360c89128a0SJaegeuk Kim if (err) 6361c89128a0SJaegeuk Kim goto restore_opts; 6362c89128a0SJaegeuk Kim 63631751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6364e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6365c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6366c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6367c5e06d10SJohann Lombardi err = -EROFS; 6368c5e06d10SJohann Lombardi goto restore_opts; 6369c5e06d10SJohann Lombardi } 63703bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6371c79d967dSChristoph Hellwig enable_quota = 1; 63723bbef91bSAustin Kim #endif 6373ac27a0ecSDave Kleikamp } 6374ac27a0ecSDave Kleikamp } 6375bfff6873SLukas Czerner 6376bfff6873SLukas Czerner /* 6377bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6378bfff6873SLukas Czerner * current settings 6379bfff6873SLukas Czerner */ 6380bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6381bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6382bfff6873SLukas Czerner else { 6383bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6384bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6385bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6386bfff6873SLukas Czerner } 6387bfff6873SLukas Czerner 63880f5bde1dSJan Kara /* 63890f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 63900f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 63910f5bde1dSJan Kara * succeed. 63920f5bde1dSJan Kara */ 6393dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6394d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6395d176b1f6SJan Kara if (err) 6396d176b1f6SJan Kara goto restore_opts; 63970f5bde1dSJan Kara } 6398d176b1f6SJan Kara 6399c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64004392fbc4SJan Kara err = ext4_commit_super(sb); 6401c89128a0SJaegeuk Kim if (err) 6402c89128a0SJaegeuk Kim goto restore_opts; 6403c89128a0SJaegeuk Kim } 64040390131bSFrank Mayhar 6405ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6406ac27a0ecSDave Kleikamp /* Release old quota file names */ 6407a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6408ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 64097c319d32SAditya Kali if (enable_quota) { 64107c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 64110f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6412e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 64137c319d32SAditya Kali err = ext4_enable_quotas(sb); 641407724f98STheodore Ts'o if (err) 64157c319d32SAditya Kali goto restore_opts; 64167c319d32SAditya Kali } 64177c319d32SAditya Kali } 64187c319d32SAditya Kali #endif 6419dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64200f5bde1dSJan Kara ext4_release_system_zone(sb); 6421d4c402d9SCurt Wohlgemuth 642261bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 642361bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 642461bb4a1cSTheodore Ts'o 6425ac27a0ecSDave Kleikamp return 0; 64260b8e58a1SAndreas Dilger 6427ac27a0ecSDave Kleikamp restore_opts: 6428ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6429ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6430a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6431ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6432ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6433ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 643430773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 643530773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6436dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64370f5bde1dSJan Kara ext4_release_system_zone(sb); 6438ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6439ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6440a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 644133458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 644233458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6443ac27a0ecSDave Kleikamp } 644433458eabSTheodore Ts'o synchronize_rcu(); 644533458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 644633458eabSTheodore Ts'o kfree(to_free[i]); 6447ac27a0ecSDave Kleikamp #endif 644861bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 644961bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6450ac27a0ecSDave Kleikamp return err; 6451ac27a0ecSDave Kleikamp } 6452ac27a0ecSDave Kleikamp 6453cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 64547edfd85bSLukas Czerner { 6455cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 64567edfd85bSLukas Czerner int ret; 64577edfd85bSLukas Czerner 6458cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 64597edfd85bSLukas Czerner 6460cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 64617edfd85bSLukas Czerner if (ret < 0) 64627edfd85bSLukas Czerner return ret; 6463cebe85d5SLukas Czerner 6464960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6465cebe85d5SLukas Czerner if (ret < 0) 6466cebe85d5SLukas Czerner return ret; 6467cebe85d5SLukas Czerner 6468cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6469cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6470cebe85d5SLukas Czerner 6471cebe85d5SLukas Czerner return 0; 64727edfd85bSLukas Czerner } 64737edfd85bSLukas Czerner 6474689c958cSLi Xi #ifdef CONFIG_QUOTA 6475689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6476689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6477689c958cSLi Xi { 6478689c958cSLi Xi struct kqid qid; 6479689c958cSLi Xi struct dquot *dquot; 6480689c958cSLi Xi u64 limit; 6481689c958cSLi Xi u64 curblock; 6482689c958cSLi Xi 6483689c958cSLi Xi qid = make_kqid_projid(projid); 6484689c958cSLi Xi dquot = dqget(sb, qid); 6485689c958cSLi Xi if (IS_ERR(dquot)) 6486689c958cSLi Xi return PTR_ERR(dquot); 64877b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6488689c958cSLi Xi 6489a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6490a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 649157c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 649257c32ea4SChengguang Xu 6493689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6494f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6495f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6496689c958cSLi Xi buf->f_blocks = limit; 6497689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6498689c958cSLi Xi (buf->f_blocks > curblock) ? 6499689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6500689c958cSLi Xi } 6501689c958cSLi Xi 6502a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6503a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6504689c958cSLi Xi if (limit && buf->f_files > limit) { 6505689c958cSLi Xi buf->f_files = limit; 6506689c958cSLi Xi buf->f_ffree = 6507689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6508689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6509689c958cSLi Xi } 6510689c958cSLi Xi 65117b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6512689c958cSLi Xi dqput(dquot); 6513689c958cSLi Xi return 0; 6514689c958cSLi Xi } 6515689c958cSLi Xi #endif 6516689c958cSLi Xi 6517617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6518ac27a0ecSDave Kleikamp { 6519ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6520617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6521617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 652227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6523d02a9391SKazuya Mio s64 bfree; 652427dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6525ac27a0ecSDave Kleikamp 6526952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6527952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6528ac27a0ecSDave Kleikamp 6529617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6530ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6531b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 653257042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 653357042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6534d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 653557042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 653627dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 653727dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 653827dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6539ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6540ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 654152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6542617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 65439591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 65440b8e58a1SAndreas Dilger 6545689c958cSLi Xi #ifdef CONFIG_QUOTA 6546689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6547689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6548689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6549689c958cSLi Xi #endif 6550ac27a0ecSDave Kleikamp return 0; 6551ac27a0ecSDave Kleikamp } 6552ac27a0ecSDave Kleikamp 6553ac27a0ecSDave Kleikamp 6554ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6555ac27a0ecSDave Kleikamp 6556bc8230eeSJan Kara /* 6557bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6558bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6559bc8230eeSJan Kara */ 6560ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6561ac27a0ecSDave Kleikamp { 65624c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6563ac27a0ecSDave Kleikamp } 6564ac27a0ecSDave Kleikamp 6565617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6566ac27a0ecSDave Kleikamp { 6567ac27a0ecSDave Kleikamp int ret, err; 6568ac27a0ecSDave Kleikamp handle_t *handle; 6569ac27a0ecSDave Kleikamp struct inode *inode; 6570ac27a0ecSDave Kleikamp 6571ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 65729924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6573617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6574ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6575ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6576ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6577617ba13bSMingming Cao err = ext4_journal_stop(handle); 6578ac27a0ecSDave Kleikamp if (!ret) 6579ac27a0ecSDave Kleikamp ret = err; 6580ac27a0ecSDave Kleikamp return ret; 6581ac27a0ecSDave Kleikamp } 6582ac27a0ecSDave Kleikamp 6583617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6584ac27a0ecSDave Kleikamp { 6585ac27a0ecSDave Kleikamp int ret, err; 6586ac27a0ecSDave Kleikamp handle_t *handle; 6587ac27a0ecSDave Kleikamp 65889924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6589617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6590ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6591ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6592ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6593617ba13bSMingming Cao err = ext4_journal_stop(handle); 6594ac27a0ecSDave Kleikamp if (!ret) 6595ac27a0ecSDave Kleikamp ret = err; 6596ac27a0ecSDave Kleikamp return ret; 6597ac27a0ecSDave Kleikamp } 6598ac27a0ecSDave Kleikamp 6599617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6600ac27a0ecSDave Kleikamp { 6601ac27a0ecSDave Kleikamp int ret, err; 6602ac27a0ecSDave Kleikamp handle_t *handle; 6603ac27a0ecSDave Kleikamp 66049924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6605617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 66069c3013e9SJan Kara if (IS_ERR(handle)) { 66079c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 66089c3013e9SJan Kara dquot_release(dquot); 6609ac27a0ecSDave Kleikamp return PTR_ERR(handle); 66109c3013e9SJan Kara } 6611ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6612617ba13bSMingming Cao err = ext4_journal_stop(handle); 6613ac27a0ecSDave Kleikamp if (!ret) 6614ac27a0ecSDave Kleikamp ret = err; 6615ac27a0ecSDave Kleikamp return ret; 6616ac27a0ecSDave Kleikamp } 6617ac27a0ecSDave Kleikamp 6618617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6619ac27a0ecSDave Kleikamp { 6620262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6621262b4662SJan Kara 6622f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6623ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6624617ba13bSMingming Cao return ext4_write_dquot(dquot); 6625ac27a0ecSDave Kleikamp } else { 6626ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6627ac27a0ecSDave Kleikamp } 6628ac27a0ecSDave Kleikamp } 6629ac27a0ecSDave Kleikamp 6630617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6631ac27a0ecSDave Kleikamp { 6632ac27a0ecSDave Kleikamp int ret, err; 6633ac27a0ecSDave Kleikamp handle_t *handle; 6634ac27a0ecSDave Kleikamp 6635ac27a0ecSDave Kleikamp /* Data block + inode block */ 6636f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6637ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6638ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6639ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6640617ba13bSMingming Cao err = ext4_journal_stop(handle); 6641ac27a0ecSDave Kleikamp if (!ret) 6642ac27a0ecSDave Kleikamp ret = err; 6643ac27a0ecSDave Kleikamp return ret; 6644ac27a0ecSDave Kleikamp } 6645ac27a0ecSDave Kleikamp 6646daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6647daf647d2STheodore Ts'o { 6648daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6649daf647d2STheodore Ts'o 6650daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6651daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6652daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6653daf647d2STheodore Ts'o * because the name of the lock is set using the 6654daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6655daf647d2STheodore Ts'o */ 6656daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6657daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6658daf647d2STheodore Ts'o } 6659daf647d2STheodore Ts'o 6660ac27a0ecSDave Kleikamp /* 6661ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6662ac27a0ecSDave Kleikamp */ 6663617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 66648c54ca9cSAl Viro const struct path *path) 6665ac27a0ecSDave Kleikamp { 6666ac27a0ecSDave Kleikamp int err; 6667ac27a0ecSDave Kleikamp 6668ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6669ac27a0ecSDave Kleikamp return -EINVAL; 66700623543bSJan Kara 6671ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6672d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6673ac27a0ecSDave Kleikamp return -EXDEV; 6674e0770e91SJan Kara 6675e0770e91SJan Kara /* Quota already enabled for this file? */ 6676e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6677e0770e91SJan Kara return -EBUSY; 6678e0770e91SJan Kara 66790623543bSJan Kara /* Journaling quota? */ 66800623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 66812b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6682f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6683b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6684b31e1552SEric Sandeen "Quota file not on filesystem root. " 6685b31e1552SEric Sandeen "Journaled quota will not work"); 668691389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 668791389240SJan Kara } else { 668891389240SJan Kara /* 668991389240SJan Kara * Clear the flag just in case mount options changed since 669091389240SJan Kara * last time. 669191389240SJan Kara */ 669291389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 66930623543bSJan Kara } 66940623543bSJan Kara 66950623543bSJan Kara /* 66960623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 66970623543bSJan Kara * all updates to the file when we bypass pagecache... 66980623543bSJan Kara */ 66990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67002b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 67010623543bSJan Kara /* 67020623543bSJan Kara * We don't need to lock updates but journal_flush() could 67030623543bSJan Kara * otherwise be livelocked... 67040623543bSJan Kara */ 67050623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 670601d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 67070623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6708f00c9e44SJan Kara if (err) 67097ffe1ea8SHidehiro Kawai return err; 67107ffe1ea8SHidehiro Kawai } 6711957153fcSJan Kara 6712daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6713daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 671415fc69bbSJan Kara if (!err) { 6715957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6716957153fcSJan Kara handle_t *handle; 6717957153fcSJan Kara 671861a92987SJan Kara /* 671961a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 672061a92987SJan Kara * files. If this fails, we return success anyway since quotas 672161a92987SJan Kara * are already enabled and this is not a hard failure. 672261a92987SJan Kara */ 6723957153fcSJan Kara inode_lock(inode); 6724957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6725957153fcSJan Kara if (IS_ERR(handle)) 6726957153fcSJan Kara goto unlock_inode; 6727957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6728957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6729957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 67304209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6731957153fcSJan Kara ext4_journal_stop(handle); 6732957153fcSJan Kara unlock_inode: 6733957153fcSJan Kara inode_unlock(inode); 673415fc69bbSJan Kara if (err) 673515fc69bbSJan Kara dquot_quota_off(sb, type); 6736957153fcSJan Kara } 673715fc69bbSJan Kara if (err) 673815fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 673915fc69bbSJan Kara I_DATA_SEM_NORMAL); 6740daf647d2STheodore Ts'o return err; 6741ac27a0ecSDave Kleikamp } 6742ac27a0ecSDave Kleikamp 67437c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 67447c319d32SAditya Kali unsigned int flags) 67457c319d32SAditya Kali { 67467c319d32SAditya Kali int err; 67477c319d32SAditya Kali struct inode *qf_inode; 6748a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 67497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6750689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6751689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 67527c319d32SAditya Kali }; 67537c319d32SAditya Kali 6754e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 67557c319d32SAditya Kali 67567c319d32SAditya Kali if (!qf_inums[type]) 67577c319d32SAditya Kali return -EPERM; 67587c319d32SAditya Kali 67598a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 67607c319d32SAditya Kali if (IS_ERR(qf_inode)) { 67617c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 67627c319d32SAditya Kali return PTR_ERR(qf_inode); 67637c319d32SAditya Kali } 67647c319d32SAditya Kali 6765bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6766bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6767daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 67687212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6769daf647d2STheodore Ts'o if (err) 6770daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 677161157b24SPan Bian iput(qf_inode); 67727c319d32SAditya Kali 67737c319d32SAditya Kali return err; 67747c319d32SAditya Kali } 67757c319d32SAditya Kali 67767c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 677725c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 67787c319d32SAditya Kali { 67797c319d32SAditya Kali int type, err = 0; 6780a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 67817c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6782689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6783689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 67847c319d32SAditya Kali }; 678549da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 678649da9392SJan Kara test_opt(sb, USRQUOTA), 678749da9392SJan Kara test_opt(sb, GRPQUOTA), 678849da9392SJan Kara test_opt(sb, PRJQUOTA), 678949da9392SJan Kara }; 67907c319d32SAditya Kali 679191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6792a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 67937c319d32SAditya Kali if (qf_inums[type]) { 67947c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 679549da9392SJan Kara DQUOT_USAGE_ENABLED | 679649da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 67977c319d32SAditya Kali if (err) { 67987c319d32SAditya Kali ext4_warning(sb, 679972ba7450STheodore Ts'o "Failed to enable quota tracking " 680072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 680172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 68024013d47aSJan Kara for (type--; type >= 0; type--) { 68034013d47aSJan Kara struct inode *inode; 68044013d47aSJan Kara 68054013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 68064013d47aSJan Kara if (inode) 68074013d47aSJan Kara inode = igrab(inode); 68087f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 68094013d47aSJan Kara if (inode) { 68104013d47aSJan Kara lockdep_set_quota_inode(inode, 68114013d47aSJan Kara I_DATA_SEM_NORMAL); 68124013d47aSJan Kara iput(inode); 68134013d47aSJan Kara } 68144013d47aSJan Kara } 68157f144fd0SJunichi Uekawa 68167c319d32SAditya Kali return err; 68177c319d32SAditya Kali } 68187c319d32SAditya Kali } 68197c319d32SAditya Kali } 68207c319d32SAditya Kali return 0; 68217c319d32SAditya Kali } 68227c319d32SAditya Kali 6823ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6824ca0e05e4SDmitry Monakhov { 682521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 682621f97697SJan Kara handle_t *handle; 6827957153fcSJan Kara int err; 682821f97697SJan Kara 682987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 683087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 683187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6832ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6833ca0e05e4SDmitry Monakhov 6834957153fcSJan Kara if (!inode || !igrab(inode)) 68350b268590SAmir Goldstein goto out; 68360b268590SAmir Goldstein 6837957153fcSJan Kara err = dquot_quota_off(sb, type); 6838964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6839957153fcSJan Kara goto out_put; 6840957153fcSJan Kara 6841957153fcSJan Kara inode_lock(inode); 684261a92987SJan Kara /* 684361a92987SJan Kara * Update modification times of quota files when userspace can 684461a92987SJan Kara * start looking at them. If we fail, we return success anyway since 684561a92987SJan Kara * this is not a hard failure and quotas are already disabled. 684661a92987SJan Kara */ 68479924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 68484209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 68494209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6850957153fcSJan Kara goto out_unlock; 68514209ae12SHarshad Shirwadkar } 6852957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6853957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6854eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 68554209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 685621f97697SJan Kara ext4_journal_stop(handle); 6857957153fcSJan Kara out_unlock: 6858957153fcSJan Kara inode_unlock(inode); 6859957153fcSJan Kara out_put: 6860964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6861957153fcSJan Kara iput(inode); 6862957153fcSJan Kara return err; 686321f97697SJan Kara out: 6864ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6865ca0e05e4SDmitry Monakhov } 6866ca0e05e4SDmitry Monakhov 6867ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6868ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6869ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6870ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6871617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6872ac27a0ecSDave Kleikamp size_t len, loff_t off) 6873ac27a0ecSDave Kleikamp { 6874ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6875725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6876ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6877ac27a0ecSDave Kleikamp int tocopy; 6878ac27a0ecSDave Kleikamp size_t toread; 6879ac27a0ecSDave Kleikamp struct buffer_head *bh; 6880ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6881ac27a0ecSDave Kleikamp 6882ac27a0ecSDave Kleikamp if (off > i_size) 6883ac27a0ecSDave Kleikamp return 0; 6884ac27a0ecSDave Kleikamp if (off+len > i_size) 6885ac27a0ecSDave Kleikamp len = i_size-off; 6886ac27a0ecSDave Kleikamp toread = len; 6887ac27a0ecSDave Kleikamp while (toread > 0) { 6888ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6889ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 68901c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 68911c215028STheodore Ts'o if (IS_ERR(bh)) 68921c215028STheodore Ts'o return PTR_ERR(bh); 6893ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6894ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6895ac27a0ecSDave Kleikamp else 6896ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6897ac27a0ecSDave Kleikamp brelse(bh); 6898ac27a0ecSDave Kleikamp offset = 0; 6899ac27a0ecSDave Kleikamp toread -= tocopy; 6900ac27a0ecSDave Kleikamp data += tocopy; 6901ac27a0ecSDave Kleikamp blk++; 6902ac27a0ecSDave Kleikamp } 6903ac27a0ecSDave Kleikamp return len; 6904ac27a0ecSDave Kleikamp } 6905ac27a0ecSDave Kleikamp 6906ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6907ac27a0ecSDave Kleikamp * enough credits) */ 6908617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6909ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6910ac27a0ecSDave Kleikamp { 6911ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6912725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 69134209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6914c5e298aeSTheodore Ts'o int retries = 0; 6915ac27a0ecSDave Kleikamp struct buffer_head *bh; 6916ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6917ac27a0ecSDave Kleikamp 6918380a0091SYe Bin if (!handle) { 6919b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6920b31e1552SEric Sandeen " cancelled because transaction is not started", 69219c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 69229c3013e9SJan Kara return -EIO; 69239c3013e9SJan Kara } 692467eeb568SDmitry Monakhov /* 692567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 692667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 692767eeb568SDmitry Monakhov */ 692867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 692967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 693067eeb568SDmitry Monakhov " cancelled because not block aligned", 693167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 693267eeb568SDmitry Monakhov return -EIO; 693367eeb568SDmitry Monakhov } 693467eeb568SDmitry Monakhov 6935c5e298aeSTheodore Ts'o do { 6936c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6937c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6938c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 693945586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6940c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 69411c215028STheodore Ts'o if (IS_ERR(bh)) 69421c215028STheodore Ts'o return PTR_ERR(bh); 6943ac27a0ecSDave Kleikamp if (!bh) 6944ac27a0ecSDave Kleikamp goto out; 69455d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6946188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6947ac27a0ecSDave Kleikamp if (err) { 6948ac27a0ecSDave Kleikamp brelse(bh); 69491c215028STheodore Ts'o return err; 6950ac27a0ecSDave Kleikamp } 6951ac27a0ecSDave Kleikamp lock_buffer(bh); 695267eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6953ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6954ac27a0ecSDave Kleikamp unlock_buffer(bh); 69550390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6956ac27a0ecSDave Kleikamp brelse(bh); 6957ac27a0ecSDave Kleikamp out: 695867eeb568SDmitry Monakhov if (inode->i_size < off + len) { 695967eeb568SDmitry Monakhov i_size_write(inode, off + len); 6960617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 69614209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 69624209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 69634209ae12SHarshad Shirwadkar err = err2; 696421f97697SJan Kara } 69654209ae12SHarshad Shirwadkar return err ? err : len; 6966ac27a0ecSDave Kleikamp } 6967ac27a0ecSDave Kleikamp #endif 6968ac27a0ecSDave Kleikamp 6969c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 697024b58424STheodore Ts'o static inline void register_as_ext2(void) 697124b58424STheodore Ts'o { 697224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 697324b58424STheodore Ts'o if (err) 697424b58424STheodore Ts'o printk(KERN_WARNING 697524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 697624b58424STheodore Ts'o } 697724b58424STheodore Ts'o 697824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 697924b58424STheodore Ts'o { 698024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 698124b58424STheodore Ts'o } 69822035e776STheodore Ts'o 69832035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 69842035e776STheodore Ts'o { 6985e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 69862035e776STheodore Ts'o return 0; 6987bc98a42cSDavid Howells if (sb_rdonly(sb)) 69882035e776STheodore Ts'o return 1; 6989e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 69902035e776STheodore Ts'o return 0; 69912035e776STheodore Ts'o return 1; 69922035e776STheodore Ts'o } 699324b58424STheodore Ts'o #else 699424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 699524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 69962035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 699724b58424STheodore Ts'o #endif 699824b58424STheodore Ts'o 699924b58424STheodore Ts'o static inline void register_as_ext3(void) 700024b58424STheodore Ts'o { 700124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 700224b58424STheodore Ts'o if (err) 700324b58424STheodore Ts'o printk(KERN_WARNING 700424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 700524b58424STheodore Ts'o } 700624b58424STheodore Ts'o 700724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 700824b58424STheodore Ts'o { 700924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 701024b58424STheodore Ts'o } 70112035e776STheodore Ts'o 70122035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 70132035e776STheodore Ts'o { 7014e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 70152035e776STheodore Ts'o return 0; 7016e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 70172035e776STheodore Ts'o return 0; 7018bc98a42cSDavid Howells if (sb_rdonly(sb)) 70192035e776STheodore Ts'o return 1; 7020e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 70212035e776STheodore Ts'o return 0; 70222035e776STheodore Ts'o return 1; 70232035e776STheodore Ts'o } 702424b58424STheodore Ts'o 702503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7026ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 702703010a33STheodore Ts'o .name = "ext4", 7028cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7029cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7030ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 703114f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7032ac27a0ecSDave Kleikamp }; 70337f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7034ac27a0ecSDave Kleikamp 7035e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7036e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7037e9e3bcecSEric Sandeen 70385dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7039ac27a0ecSDave Kleikamp { 7040e9e3bcecSEric Sandeen int i, err; 7041c9de560dSAlex Tomas 7042e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 704307c0c5d8SAl Viro ext4_li_info = NULL; 704407c0c5d8SAl Viro 70459a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 704612e9b892SDmitry Monakhov ext4_check_flag_values(); 7047e9e3bcecSEric Sandeen 7048e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7049e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7050e9e3bcecSEric Sandeen 705151865fdaSZheng Liu err = ext4_init_es(); 70526fd058f7STheodore Ts'o if (err) 70536fd058f7STheodore Ts'o return err; 705451865fdaSZheng Liu 70551dc0aa46SEric Whitney err = ext4_init_pending(); 70561dc0aa46SEric Whitney if (err) 705722cfe4b4SEric Biggers goto out7; 705822cfe4b4SEric Biggers 705922cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 706022cfe4b4SEric Biggers if (err) 70611dc0aa46SEric Whitney goto out6; 70621dc0aa46SEric Whitney 706351865fdaSZheng Liu err = ext4_init_pageio(); 706451865fdaSZheng Liu if (err) 7065b5799018STheodore Ts'o goto out5; 706651865fdaSZheng Liu 70675dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7068bd2d0210STheodore Ts'o if (err) 7069b5799018STheodore Ts'o goto out4; 7070857ac889SLukas Czerner 7071b5799018STheodore Ts'o err = ext4_init_sysfs(); 7072dd68314cSTheodore Ts'o if (err) 7073b5799018STheodore Ts'o goto out3; 7074857ac889SLukas Czerner 70755dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7076ac27a0ecSDave Kleikamp if (err) 7077c9de560dSAlex Tomas goto out2; 7078ac27a0ecSDave Kleikamp err = init_inodecache(); 7079ac27a0ecSDave Kleikamp if (err) 7080ac27a0ecSDave Kleikamp goto out1; 7081aa75f4d3SHarshad Shirwadkar 7082aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7083aa75f4d3SHarshad Shirwadkar if (err) 7084aa75f4d3SHarshad Shirwadkar goto out05; 7085aa75f4d3SHarshad Shirwadkar 708624b58424STheodore Ts'o register_as_ext3(); 70872035e776STheodore Ts'o register_as_ext2(); 708803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7089ac27a0ecSDave Kleikamp if (err) 7090ac27a0ecSDave Kleikamp goto out; 7091bfff6873SLukas Czerner 7092ac27a0ecSDave Kleikamp return 0; 7093ac27a0ecSDave Kleikamp out: 709424b58424STheodore Ts'o unregister_as_ext2(); 709524b58424STheodore Ts'o unregister_as_ext3(); 7096ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7097aa75f4d3SHarshad Shirwadkar out05: 7098ac27a0ecSDave Kleikamp destroy_inodecache(); 7099ac27a0ecSDave Kleikamp out1: 71005dabfc78STheodore Ts'o ext4_exit_mballoc(); 71019c191f70ST Makphaibulchoke out2: 7102b5799018STheodore Ts'o ext4_exit_sysfs(); 7103b5799018STheodore Ts'o out3: 7104dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7105b5799018STheodore Ts'o out4: 71065dabfc78STheodore Ts'o ext4_exit_pageio(); 7107b5799018STheodore Ts'o out5: 710822cfe4b4SEric Biggers ext4_exit_post_read_processing(); 71091dc0aa46SEric Whitney out6: 711022cfe4b4SEric Biggers ext4_exit_pending(); 711122cfe4b4SEric Biggers out7: 711251865fdaSZheng Liu ext4_exit_es(); 711351865fdaSZheng Liu 7114ac27a0ecSDave Kleikamp return err; 7115ac27a0ecSDave Kleikamp } 7116ac27a0ecSDave Kleikamp 71175dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7118ac27a0ecSDave Kleikamp { 7119bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 712024b58424STheodore Ts'o unregister_as_ext2(); 712124b58424STheodore Ts'o unregister_as_ext3(); 712203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7123ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7124ac27a0ecSDave Kleikamp destroy_inodecache(); 71255dabfc78STheodore Ts'o ext4_exit_mballoc(); 7126b5799018STheodore Ts'o ext4_exit_sysfs(); 71275dabfc78STheodore Ts'o ext4_exit_system_zone(); 71285dabfc78STheodore Ts'o ext4_exit_pageio(); 712922cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7130dd12ed14SEric Sandeen ext4_exit_es(); 71311dc0aa46SEric Whitney ext4_exit_pending(); 7132ac27a0ecSDave Kleikamp } 7133ac27a0ecSDave Kleikamp 7134ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 713583982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7136ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 71377ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 71385dabfc78STheodore Ts'o module_init(ext4_init_fs) 71395dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7140