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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-13 20:14:55 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-13 20:14:55 (GMT) |
commit | 18b34d9a7a085ba8f9cafa6a0d002e2cbac87c1f (patch) | |
tree | 939755a58a68aae5e1241b2a905ea612aeb2e589 /fs | |
parent | 502fde1a0a2990ec54eab5241d3135c545da7372 (diff) | |
parent | bf40c92635d63fcc574c52649f7cda13e0418ac1 (diff) | |
download | linux-18b34d9a7a085ba8f9cafa6a0d002e2cbac87c1f.tar.xz |
Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bugfixes from Ted Ts'o:
"More bug fixes for ext4 -- most importantly, a fix for a bug
introduced in 3.15 that can end up triggering a file system corruption
error after a journal replay.
It shouldn't lead to any actual data corruption, but it is scary and
can force file systems to be remounted read-only, etc"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix potential null pointer dereference in ext4_free_inode
ext4: fix a potential deadlock in __ext4_es_shrink()
ext4: revert commit which was causing fs corruption after journal replays
ext4: disable synchronous transaction batching if max_batch_time==0
ext4: clarify ext4_error message in ext4_mb_generate_buddy_error()
ext4: clarify error count warning messages
ext4: fix unjournalled bg descriptor while initializing inode bitmap
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ext4/extents_status.c | 4 | ||||
-rw-r--r-- | fs/ext4/ialloc.c | 16 | ||||
-rw-r--r-- | fs/ext4/mballoc.c | 4 | ||||
-rw-r--r-- | fs/ext4/super.c | 60 | ||||
-rw-r--r-- | fs/jbd2/transaction.c | 5 |
5 files changed, 44 insertions, 45 deletions
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 3f5c188..0b7e28e 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -966,10 +966,10 @@ retry: continue; } - if (ei->i_es_lru_nr == 0 || ei == locked_ei) + if (ei->i_es_lru_nr == 0 || ei == locked_ei || + !write_trylock(&ei->i_es_lock)) continue; - write_lock(&ei->i_es_lock); shrunk = __es_try_to_reclaim_extents(ei, nr_to_scan); if (ei->i_es_lru_nr == 0) list_del_init(&ei->i_es_lru); diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index a87455d..5b87fc3 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -338,7 +338,7 @@ out: fatal = err; } else { ext4_error(sb, "bit already cleared for inode %lu", ino); - if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { + if (gdp && !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { int count; count = ext4_free_inodes_count(sb, gdp); percpu_counter_sub(&sbi->s_freeinodes_counter, @@ -874,6 +874,13 @@ got: goto out; } + BUFFER_TRACE(group_desc_bh, "get_write_access"); + err = ext4_journal_get_write_access(handle, group_desc_bh); + if (err) { + ext4_std_error(sb, err); + goto out; + } + /* We may have to initialize the block bitmap if it isn't already */ if (ext4_has_group_desc_csum(sb) && gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { @@ -910,13 +917,6 @@ got: } } - BUFFER_TRACE(group_desc_bh, "get_write_access"); - err = ext4_journal_get_write_access(handle, group_desc_bh); - if (err) { - ext4_std_error(sb, err); - goto out; - } - /* Update the relevant bg descriptor fields */ if (ext4_has_group_desc_csum(sb)) { int free; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 7f72f50..2dcb936 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -752,8 +752,8 @@ void ext4_mb_generate_buddy(struct super_block *sb, if (free != grp->bb_free) { ext4_grp_locked_error(sb, group, 0, 0, - "%u clusters in bitmap, %u in gd; " - "block bitmap corrupt.", + "block bitmap and bg descriptor " + "inconsistent: %u vs %u free clusters", free, grp->bb_free); /* * If we intend to continue, we consider group descriptor diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b9b9aab..6df7bc6 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1525,8 +1525,6 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, arg = JBD2_DEFAULT_MAX_COMMIT_AGE; sbi->s_commit_interval = HZ * arg; } else if (token == Opt_max_batch_time) { - if (arg == 0) - arg = EXT4_DEF_MAX_BATCH_TIME; sbi->s_max_batch_time = arg; } else if (token == Opt_min_batch_time) { sbi->s_min_batch_time = arg; @@ -2809,10 +2807,11 @@ static void print_daily_error_info(unsigned long arg) es = sbi->s_es; if (es->s_error_count) - ext4_msg(sb, KERN_NOTICE, "error count: %u", + /* fsck newer than v1.41.13 is needed to clean this condition. */ + ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", le32_to_cpu(es->s_error_count)); if (es->s_first_error_time) { - printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", + printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", sb->s_id, le32_to_cpu(es->s_first_error_time), (int) sizeof(es->s_first_error_func), es->s_first_error_func, @@ -2826,7 +2825,7 @@ static void print_daily_error_info(unsigned long arg) printk("\n"); } if (es->s_last_error_time) { - printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", + printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", sb->s_id, le32_to_cpu(es->s_last_error_time), (int) sizeof(es->s_last_error_func), es->s_last_error_func, @@ -3880,38 +3879,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) goto failed_mount2; } } - - /* - * set up enough so that it can read an inode, - * and create new inode for buddy allocator - */ - sbi->s_gdb_count = db_count; - if (!test_opt(sb, NOLOAD) && - EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) - sb->s_op = &ext4_sops; - else - sb->s_op = &ext4_nojournal_sops; - - ext4_ext_init(sb); - err = ext4_mb_init(sb); - if (err) { - ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", - err); - goto failed_mount2; - } - if (!ext4_check_descriptors(sb, &first_not_zeroed)) { ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); - goto failed_mount2a; + goto failed_mount2; } if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) if (!ext4_fill_flex_info(sb)) { ext4_msg(sb, KERN_ERR, "unable to initialize " "flex_bg meta info!"); - goto failed_mount2a; + goto failed_mount2; } + sbi->s_gdb_count = db_count; get_random_bytes(&sbi->s_next_generation, sizeof(u32)); spin_lock_init(&sbi->s_next_gen_lock); @@ -3946,6 +3926,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_stripe = ext4_get_stripe_size(sbi); sbi->s_extent_max_zeroout_kb = 32; + /* + * set up enough so that it can read an inode + */ + if (!test_opt(sb, NOLOAD) && + EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) + sb->s_op = &ext4_sops; + else + sb->s_op = &ext4_nojournal_sops; sb->s_export_op = &ext4_export_ops; sb->s_xattr = ext4_xattr_handlers; #ifdef CONFIG_QUOTA @@ -4135,13 +4123,21 @@ no_journal: if (err) { ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " "reserved pool", ext4_calculate_resv_clusters(sb)); - goto failed_mount5; + goto failed_mount4a; } err = ext4_setup_system_zone(sb); if (err) { ext4_msg(sb, KERN_ERR, "failed to initialize system " "zone (%d)", err); + goto failed_mount4a; + } + + ext4_ext_init(sb); + err = ext4_mb_init(sb); + if (err) { + ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", + err); goto failed_mount5; } @@ -4218,8 +4214,11 @@ failed_mount8: failed_mount7: ext4_unregister_li_request(sb); failed_mount6: - ext4_release_system_zone(sb); + ext4_mb_release(sb); failed_mount5: + ext4_ext_release(sb); + ext4_release_system_zone(sb); +failed_mount4a: dput(sb->s_root); sb->s_root = NULL; failed_mount4: @@ -4243,14 +4242,11 @@ failed_mount3: percpu_counter_destroy(&sbi->s_extent_cache_cnt); if (sbi->s_mmp_tsk) kthread_stop(sbi->s_mmp_tsk); -failed_mount2a: - ext4_mb_release(sb); failed_mount2: for (i = 0; i < db_count; i++) brelse(sbi->s_group_desc[i]); ext4_kvfree(sbi->s_group_desc); failed_mount: - ext4_ext_release(sb); if (sbi->s_chksum_driver) crypto_free_shash(sbi->s_chksum_driver); if (sbi->s_proc) { diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 38cfcf5..6f0f590 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1588,9 +1588,12 @@ int jbd2_journal_stop(handle_t *handle) * to perform a synchronous write. We do this to detect the * case where a single process is doing a stream of sync * writes. No point in waiting for joiners in that case. + * + * Setting max_batch_time to 0 disables this completely. */ pid = current->pid; - if (handle->h_sync && journal->j_last_sync_writer != pid) { + if (handle->h_sync && journal->j_last_sync_writer != pid && + journal->j_max_batch_time) { u64 commit_time, trans_time; journal->j_last_sync_writer = pid; |