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linux/fs/xfs
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Wengang Wang 58f880711f xfs: make sure sb_fdblocks is non-negative 
A user with a completely full filesystem experienced an unexpected
shutdown when the filesystem tried to write the superblock during
runtime.
kernel shows the following dmesg:

[    8.176281] XFS (dm-4): Metadata corruption detected at xfs_sb_write_verify+0x60/0x120 [xfs], xfs_sb block 0x0
[    8.177417] XFS (dm-4): Unmount and run xfs_repair
[    8.178016] XFS (dm-4): First 128 bytes of corrupted metadata buffer:
[    8.178703] 00000000: 58 46 53 42 00 00 10 00 00 00 00 00 01 90 00 00  XFSB............
[    8.179487] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    8.180312] 00000020: cf 12 dc 89 ca 26 45 29 92 e6 e3 8d 3b b8 a2 c3  .....&E)....;...
[    8.181150] 00000030: 00 00 00 00 01 00 00 06 00 00 00 00 00 00 00 80  ................
[    8.182003] 00000040: 00 00 00 00 00 00 00 81 00 00 00 00 00 00 00 82  ................
[    8.182004] 00000050: 00 00 00 01 00 64 00 00 00 00 00 04 00 00 00 00  .....d..........
[    8.182004] 00000060: 00 00 64 00 b4 a5 02 00 02 00 00 08 00 00 00 00  ..d.............
[    8.182005] 00000070: 00 00 00 00 00 00 00 00 0c 09 09 03 17 00 00 19  ................
[    8.182008] XFS (dm-4): Corruption of in-memory data detected.  Shutting down filesystem
[    8.182010] XFS (dm-4): Please unmount the filesystem and rectify the problem(s)

When xfs_log_sb writes super block to disk, b_fdblocks is fetched from
m_fdblocks without any lock. As m_fdblocks can experience a positive ->
negative -> positive changing when the FS reaches fullness (see
xfs_mod_fdblocks). So there is a chance that sb_fdblocks is negative, and
because sb_fdblocks is type of unsigned long long, it reads super big.
And sb_fdblocks being bigger than sb_dblocks is a problem during log
recovery, xfs_validate_sb_write() complains.

Fix:
As sb_fdblocks will be re-calculated during mount when lazysbcount is
enabled, We just need to make xfs_validate_sb_write() happy -- make sure
sb_fdblocks is not nenative. This patch also takes care of other percpu
counters in xfs_log_sb.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
2024-06-10 11:38:12 +05:30
..
libxfs xfs: make sure sb_fdblocks is non-negative 2024-06-10 11:38:12 +05:30
scrub xfs: don't open-code u64_to_user_ptr 2024-05-27 15:55:52 +05:30
Kconfig xfs: support in-memory btrees 2024-02-22 12:43:35 -08:00
Makefile New code for 6.10: 2024-05-20 12:55:12 -07:00
xfs.h
xfs_acl.c xfs: make attr removal an explicit operation 2024-04-23 07:46:51 -07:00
xfs_acl.h
xfs_aops.c xfs: xfs_quota_unreserve_blkres can't fail 2024-05-03 11:15:03 +05:30
xfs_aops.h
xfs_attr_inactive.c xfs: report dir/attr block corruption errors to the health system 2024-02-22 12:32:18 -08:00
xfs_attr_item.c xfs: fix xfs_init_attr_trans not handling explicit operation codes 2024-05-27 15:55:52 +05:30
xfs_attr_item.h xfs: create attr log item opcodes and formats for parent pointers 2024-04-23 07:46:57 -07:00
xfs_attr_list.c xfs: pass the attr value to put_listent when possible 2024-04-23 07:47:00 -07:00
xfs_bio_io.c
xfs_bmap_item.c xfs: simplify iext overflow checking and upgrade 2024-05-03 11:20:06 +05:30
xfs_bmap_item.h xfs: move xfs_bmap_defer_add to xfs_bmap_item.c 2024-02-22 12:44:21 -08:00
xfs_bmap_util.c xfs: simplify iext overflow checking and upgrade 2024-05-03 11:20:06 +05:30
xfs_bmap_util.h xfs: xfs_quota_unreserve_blkres can't fail 2024-05-03 11:15:03 +05:30
xfs_buf.c getting rid of bogus set_blocksize() uses, switching it 2024-05-21 08:34:51 -07:00
xfs_buf.h New code for 6.9: 2024-03-13 13:52:24 -07:00
xfs_buf_item.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_buf_item.h
xfs_buf_item_recover.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_buf_mem.c xfs: fix dev_t usage in xmbuf tracepoints 2024-03-15 10:30:23 +05:30
xfs_buf_mem.h xfs: launder in-memory btree buffers before transaction commit 2024-02-22 12:43:36 -08:00
xfs_dahash_test.c
xfs_dahash_test.h
xfs_dir2_readdir.c xfs: refactor dir format helpers 2024-04-26 11:21:46 +05:30
xfs_discard.c xfs: fix performance problems when fstrimming a subset of a fragmented AG 2024-04-15 14:59:00 -07:00
xfs_discard.h xfs: move log discard work to xfs_discard.c 2023-10-04 09:24:02 +11:00
xfs_dquot.c xfs: simplify iext overflow checking and upgrade 2024-05-03 11:20:06 +05:30
xfs_dquot.h xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_dquot_item.c
xfs_dquot_item.h
xfs_dquot_item_recover.c xfs: dquot recovery does not validate the recovered dquot 2023-11-22 23:39:36 +05:30
xfs_drain.c
xfs_drain.h
xfs_error.c xfs: add error injection to test file mapping exchange recovery 2024-04-15 14:54:19 -07:00
xfs_error.h
xfs_exchmaps_item.c xfs: capture inode generation numbers in the ondisk exchmaps log item 2024-04-15 14:54:24 -07:00
xfs_exchmaps_item.h xfs: create deferred log items for file mapping exchanges 2024-04-15 14:54:17 -07:00
xfs_exchrange.c xfs: support non-power-of-two rtextsize with exchange-range 2024-04-15 14:54:23 -07:00
xfs_exchrange.h xfs: create deferred log items for file mapping exchanges 2024-04-15 14:54:17 -07:00
xfs_export.c xfs: add parent pointer ioctls 2024-04-23 07:47:00 -07:00
xfs_export.h xfs: add parent pointer ioctls 2024-04-23 07:47:00 -07:00
xfs_extent_busy.c xfs: unwind xfs_extent_busy_clear 2024-04-22 12:53:34 +05:30
xfs_extent_busy.h xfs: repair free space btrees 2023-12-15 10:03:32 -08:00
xfs_extfree_item.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_extfree_item.h
xfs_file.c New code for 6.10: 2024-05-20 12:55:12 -07:00
xfs_file.h xfs: create a new helper to return a file's allocation unit 2024-04-15 14:54:10 -07:00
xfs_filestream.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_filestream.h
xfs_fsmap.c xfs: refactor realtime inode locking 2024-04-22 18:00:47 +05:30
xfs_fsmap.h
xfs_fsops.c xfs: split xfs_mod_freecounter 2024-04-22 18:00:47 +05:30
xfs_fsops.h xfs: split xfs_mod_freecounter 2024-04-22 18:00:47 +05:30
xfs_globals.c xfs: add debug knobs to control btree bulk load slack factors 2023-12-15 10:03:28 -08:00
xfs_handle.c xfs: don't open-code u64_to_user_ptr 2024-05-27 15:55:52 +05:30
xfs_handle.h xfs: add parent pointer ioctls 2024-04-23 07:47:00 -07:00
xfs_health.c xfs: report directory tree corruption in the health information 2024-04-23 16:55:17 -07:00
xfs_hooks.c xfs: allow scrub to hook metadata updates in other writers 2024-02-22 12:30:45 -08:00
xfs_hooks.h xfs: allow scrub to hook metadata updates in other writers 2024-02-22 12:30:45 -08:00
xfs_icache.c xfs: widen flags argument to the xfs_iflags_* helpers 2024-05-02 07:48:37 -07:00
xfs_icache.h xfs: use per-mount cpumask to track nonempty percpu inodegc lists 2023-09-11 08:39:03 -07:00
xfs_icreate_item.c xfs: convert kmem_free() for kvmalloc users to kvfree() 2024-02-13 18:07:34 +05:30
xfs_icreate_item.h
xfs_inode.c xfs: fix corruptions in the directory tree 2024-04-23 16:55:17 -07:00
xfs_inode.h xfs: widen flags argument to the xfs_iflags_* helpers 2024-05-02 07:48:37 -07:00
xfs_inode_item.c xfs: Replace xfs_isilocked with xfs_assert_ilocked 2024-02-19 21:19:33 +05:30
xfs_inode_item.h
xfs_inode_item_recover.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_ioctl.c xfs: introduce vectored scrub mode 2024-04-23 16:55:18 -07:00
xfs_ioctl.h xfs: move handle ioctl code to xfs_handle.c 2024-04-23 07:47:00 -07:00
xfs_ioctl32.c xfs: move handle ioctl code to xfs_handle.c 2024-04-23 07:47:00 -07:00
xfs_ioctl32.h arch: Remove Itanium (IA-64) architecture 2023-09-11 08:13:17 +00:00
xfs_iomap.c xfs: simplify iext overflow checking and upgrade 2024-05-03 11:20:06 +05:30
xfs_iomap.h
xfs_iops.c xfs: parent pointer attribute creation 2024-04-23 07:46:58 -07:00
xfs_iops.h xfs: declare xfs_file.c symbols in xfs_file.h 2024-04-15 14:54:09 -07:00
xfs_itable.c xfs: hide private inodes from bulkstat and handle functions 2024-04-15 14:58:48 -07:00
xfs_itable.h
xfs_iunlink_item.c
xfs_iunlink_item.h
xfs_iwalk.c xfs: Clear W=1 warning in xfs_iwalk_run_callbacks() 2024-05-27 15:54:24 +05:30
xfs_iwalk.h
xfs_linux.h xfs: refactor non-power-of-two alignment checks 2024-04-15 14:54:12 -07:00
xfs_log.c xfs: only clear log incompat flags at clean unmount 2024-04-15 14:54:06 -07:00
xfs_log.h xfs: only clear log incompat flags at clean unmount 2024-04-15 14:54:06 -07:00
xfs_log_cil.c xfs: fix CIL sparse lock context warnings 2024-04-20 20:23:59 +05:30
xfs_log_priv.h xfs: Fix typo in comment 2024-04-22 12:51:43 +05:30
xfs_log_recover.c xfs: clean up buffer allocation in xlog_do_recovery_pass 2024-05-03 11:10:17 +05:30
xfs_message.c
xfs_message.h
xfs_mount.c xfs: use an XFS_OPSTATE_ flag for detecting if logged xattrs are available 2024-04-23 07:46:51 -07:00
xfs_mount.h xfs: use an XFS_OPSTATE_ flag for detecting if logged xattrs are available 2024-04-23 07:46:51 -07:00
xfs_mru_cache.c xfs: use GFP_KERNEL in pure transaction contexts 2024-02-13 18:07:35 +05:30
xfs_mru_cache.h
xfs_notify_failure.c mm, pmem, xfs: Introduce MF_MEM_PRE_REMOVE for unbind 2023-12-07 14:34:26 +05:30
xfs_pnfs.c
xfs_pnfs.h
xfs_pwork.c
xfs_pwork.h
xfs_qm.c xfs: Hold inode locks in xfs_ialloc 2024-04-15 14:59:02 -07:00
xfs_qm.h xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_qm_bhv.c xfs: track quota updates during live quotacheck 2024-02-22 12:30:55 -08:00
xfs_qm_syscalls.c
xfs_quota.h xfs: xfs_quota_unreserve_blkres can't fail 2024-05-03 11:15:03 +05:30
xfs_quotaops.c
xfs_refcount_item.c xfs: place intent recovery under NOFS allocation context 2024-02-13 18:07:35 +05:30
xfs_refcount_item.h
xfs_reflink.c xfs: Add cond_resched to block unmap range and reflink remap path 2024-05-27 20:50:35 +05:30
xfs_reflink.h
xfs_rmap_item.c xfs: place intent recovery under NOFS allocation context 2024-02-13 18:07:35 +05:30
xfs_rmap_item.h
xfs_rtalloc.c xfs: simplify iext overflow checking and upgrade 2024-05-03 11:20:06 +05:30
xfs_rtalloc.h xfs: move xfs_bmap_rtalloc to xfs_rtalloc.c 2023-12-22 11:18:11 +05:30
xfs_stats.c xfs: define an in-memory btree for storing refcount bag info during repairs 2024-02-22 12:43:40 -08:00
xfs_stats.h xfs: define an in-memory btree for storing refcount bag info during repairs 2024-02-22 12:43:40 -08:00
xfs_super.c xfs: add a incompat feature bit for parent pointers 2024-04-23 07:47:01 -07:00
xfs_super.h
xfs_symlink.c xfs: add parent attributes to symlink 2024-04-23 07:46:58 -07:00
xfs_symlink.h xfs: move remote symlink target read function to libxfs 2024-02-22 12:45:17 -08:00
xfs_sysctl.c fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
xfs_sysctl.h xfs: add debug knobs to control btree bulk load slack factors 2023-12-15 10:03:28 -08:00
xfs_sysfs.c xfs: remove duplicate ifdefs 2024-02-17 09:32:32 +05:30
xfs_sysfs.h
xfs_trace.c xfs: add parent pointer ioctls 2024-04-23 07:47:00 -07:00
xfs_trace.h tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
xfs_trans.c xfs: split xfs_mod_freecounter 2024-04-22 18:00:47 +05:30
xfs_trans.h xfs: don't use current->journal_info 2024-03-25 10:21:01 +05:30
xfs_trans_ail.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_trans_buf.c xfs: launder in-memory btree buffers before transaction commit 2024-02-22 12:43:36 -08:00
xfs_trans_dquot.c xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_trans_priv.h
xfs_xattr.c xfs: make the reserved block permission flag explicit in xfs_attr_set 2024-04-23 07:47:03 -07:00
xfs_xattr.h xfs: remove xfs_da_args.attr_flags 2024-04-23 07:46:50 -07:00