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2019-11-10xfs: devirtualize ->data_entsizeChristoph Hellwig
Replace the ->data_entsize dir ops method with a directly called xfs_dir2_data_entsize helper that takes care of the differences between the directory format with and without the file type field. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: replace xfs_dir3_data_endp with xfs_dir3_data_end_offsetChristoph Hellwig
All the callers really want an offset into the buffer, so adopt the helper to return that instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove the now unused ->data_entry_p methodChristoph Hellwig
Now that all users use the data_entry_offset field this method is unused and can be removed. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup __xfs_dir3_data_checkChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup xfs_dir2_data_freescan_intChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup xfs_dir2_block_to_sfChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup xchk_directory_data_bestfreeChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup xchk_dir_recChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup xfs_dir2_leaf_getdentsChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: cleanup xfs_dir2_block_getdentsChristoph Hellwig
Use an offset as the main means for iteration, and only do pointer arithmetics to find the data/unused entries. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove the ->data_unused_p methodChristoph Hellwig
Replace the two users of the ->data_unused_p dir ops method with a direct calculation using ->data_entry_offset, and clean them up a bit. xfs_dir2_sf_to_block already had an offset variable containing the value of ->data_entry_offset, which we are now reusing to make it clear that the initial freespace entry is at the same place that we later fill in the 1 entry, and in xfs_dir3_data_init the function is cleaned up a bit to keep the initialization of fields of a given structure close to each other, and to avoid a local variable. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove the ->data_dot_entry_p and ->data_dotdot_entry_p methodsChristoph Hellwig
The only user of the ->data_dot_entry_p and ->data_dotdot_entry_p methods is the xfs_dir2_sf_to_block function that builds block format directorys from a short form directory. It already uses pointer arithmetics with a offset variable to do so for the real entries in the directory, so switch the generation of the . and .. entries to the same scheme, and clean up some of the later pointer arithmetics to use bp->b_addr directly as well and avoid some casts. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove the data_dotdot_offset field in struct xfs_dir_opsChristoph Hellwig
The data_dotdot_offset value is always equal to data_entry_offset plus the fixed size of the "." entry. Right now calculating that fixed size requires an indirect call, but by the end of this series it will be an inline function that can be constant folded. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove the data_dot_offset field in struct xfs_dir_opsChristoph Hellwig
The data_dot_offset value is always equal to data_entry_offset given that "." is always the first entry in the directory. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove the unused ->data_first_entry_p methodChristoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->sf_get_ftype and ->sf_put_ftypeChristoph Hellwig
Replace the ->sf_get_ftype and ->sf_put_ftype dir ops methods with directly called xfs_dir2_sf_get_ftype and xfs_dir2_sf_put_ftype helpers that takes care of the differences between the directory format with and without the file type field. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->sf_get_ino and ->sf_put_inoChristoph Hellwig
Replace the ->sf_get_ino and ->sf_put_ino dir ops methods with directly called xfs_dir2_sf_get_ino and xfs_dir2_sf_put_ino helpers that take care of the difference between the directory format with and without the file type field. Also move xfs_dir2_sf_get_parent_ino and xfs_dir2_sf_put_parent_ino to xfs_dir2_sf.c with the rest of the low-level short form entry handling and use XFS_MAXINUMBER istead of opencoded constants. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->sf_entsize and ->sf_nextentryChristoph Hellwig
Just check for file-type enabled directories directly. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->sf_get_parent_ino and ->sf_put_parent_inoChristoph Hellwig
The parent inode handling is the same for all directory format variants, just use direct calls instead of going through a pointless indirect call. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->db_to_fdb and ->db_to_fdindexChristoph Hellwig
Now that the max bests value is in struct xfs_da_geometry both instances of ->db_to_fdb and ->db_to_fdindex are identical. Replace them with local xfs_dir2_db_to_fdb and xfs_dir2_db_to_fdindex functions in xfs_dir2_node.c. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: move the max dir2 free bests count to struct xfs_da_geometryChristoph Hellwig
Move the max free bests count towards our structure for dir/attr geometry parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: move the dir2 free header size to struct xfs_da_geometryChristoph Hellwig
Move the free header size towards our structure for dir/attr geometry parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: add a bests pointer to struct xfs_dir3_icfree_hdrChristoph Hellwig
All but two callers of the ->free_bests_p dir operation already have a struct xfs_dir3_icfree_hdr from a previous call to xfs_dir2_free_hdr_from_disk at hand. Add a pointer to the bests to struct xfs_dir3_icfree_hdr to clean up this pattern. To optimize this pattern, pass the struct xfs_dir3_icfree_hdr to xfs_dir2_free_log_bests instead of recalculating the pointer there. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: make the xfs_dir3_icfree_hdr available to xfs_dir2_node_addname_intChristoph Hellwig
Return the xfs_dir3_icfree_hdr used by the helpers called from xfs_dir2_node_addname_int to the main function to prepare for the next round of changes where we'll use the ichdr in xfs_dir3_icfree_hdr to avoid extra operations to find the bests pointers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->free_hdr_to_diskChristoph Hellwig
Replace the ->free_hdr_to_disk dir ops method with a directly called xfs_dir2_free_hdr_to_disk helper that takes care of the differences between the v4 and v5 on-disk format. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->free_hdr_from_diskChristoph Hellwig
Replace the ->free_hdr_from_disk dir ops method with a directly called xfs_dir_free_hdr_from_disk helper that takes care of the differences between the v4 and v5 on-disk format. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: move the max dir2 leaf entries count to struct xfs_da_geometryChristoph Hellwig
Move the max leaf entries count towards our structure for dir/attr geometry parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: move the dir2 leaf header size to struct xfs_da_geometryChristoph Hellwig
Move the leaf header size towards our structure for dir/attr geometry parameters. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: add an entries pointer to struct xfs_dir3_icleaf_hdrChristoph Hellwig
All callers of the ->node_tree_p dir operation already have a struct xfs_dir3_icleaf_hdr from a previous call to xfs_da_leaf_hdr_from_disk at hand, or just need slight changes to the calling conventions to do so. Add a pointer to the entries to struct xfs_dir3_icleaf_hdr to clean up this pattern. To make this possible the xfs_dir3_leaf_log_ents function grow a new argument to pass the xfs_dir3_icleaf_hdr that call callers already have, and xfs_dir2_leaf_lookup_int returns the xfs_dir3_icleaf_hdr to the callers so that they can later use it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->leaf_hdr_to_diskChristoph Hellwig
Replace the ->leaf_hdr_to_disk dir ops method with a directly called xfs_dir_leaf_hdr_to_disk helper that takes care of the differences between the v4 and v5 on-disk format. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->leaf_hdr_from_diskChristoph Hellwig
Replace the ->leaf_hdr_from_disk dir ops method with a directly called xfs_dir2_leaf_hdr_from_disk helper that takes care of the differences between the v4 and v5 on-disk format. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: move the node header size to struct xfs_da_geometryChristoph Hellwig
Move the node header size field to struct xfs_da_geometry, and remove the now unused non-directory dir ops infrastructure. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: add a btree entries pointer to struct xfs_da3_icnode_hdrChristoph Hellwig
All but two callers of the ->node_tree_p dir operation already have a xfs_da3_icnode_hdr from a previous call to xfs_da3_node_hdr_from_disk at hand. Add a pointer to the btree entries to struct xfs_da3_icnode_hdr to clean up this pattern. The two remaining callers now expand the whole header as well, but that isn't very expensive and not in a super hot path anyway. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->node_hdr_to_diskChristoph Hellwig
Replace the ->node_hdr_to_disk dir ops method with a directly called xfs_da_node_hdr_to_disk helper that takes care of the v4 vs v5 difference. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: devirtualize ->node_hdr_from_diskChristoph Hellwig
Replace the ->node_hdr_from_disk dir ops method with a directly called xfs_da_node_hdr_from_disk helper that takes care of the v4 vs v5 difference. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: refactor btree node scrubbingChristoph Hellwig
Break up xchk_da_btree_entry and handle looking up leaf node entries in the attr / dir callbacks, so that only the generic node handling is left in the common core code. Note that the checks for the crc enabled blocks are removed, as the scrubbing code already remaps the magic numbers earlier. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: use unsigned int for all size values in struct xfs_da_geometryChristoph Hellwig
None of these can ever be negative, so use unsigned types. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: move incore structures out of xfs_da_format.hChristoph Hellwig
Move the abstract in-memory version of various btree block headers out of xfs_da_format.h as they aren't on-disk formats. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: remove a stray tab in xfs_remount_rw()Dan Carpenter
The extra tab makes the code slightly confusing. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ian Kent <raven@themaw.net> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-10xfs: convert EIO to EFSCORRUPTED when log contents are invalidDarrick J. Wong
Convert EIO to EFSCORRUPTED in the logging code when we can determine that the log contents are invalid. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-10xfs: refactor "does this fork map blocks" predicateDarrick J. Wong
Replace the open-coded checks for whether or not an inode fork maps blocks with a macro that will implant the code for us. This helps us declutter the bmap code a bit. Note that I had to use a macro instead of a static inline function because of C header dependency problems between xfs_inode.h and xfs_inode_fork.h. Conversion was performed with the following Coccinelle script: @@ expression ip, w; @@ - XFS_IFORK_FORMAT(ip, w) == XFS_DINODE_FMT_EXTENTS || XFS_IFORK_FORMAT(ip, w) == XFS_DINODE_FMT_BTREE + xfs_ifork_has_extents(ip, w) @@ expression ip, w; @@ - XFS_IFORK_FORMAT(ip, w) != XFS_DINODE_FMT_EXTENTS && XFS_IFORK_FORMAT(ip, w) != XFS_DINODE_FMT_BTREE + !xfs_ifork_has_extents(ip, w) @@ expression ip, w; @@ - XFS_IFORK_FORMAT(ip, w) == XFS_DINODE_FMT_BTREE || XFS_IFORK_FORMAT(ip, w) == XFS_DINODE_FMT_EXTENTS + xfs_ifork_has_extents(ip, w) @@ expression ip, w; @@ - XFS_IFORK_FORMAT(ip, w) != XFS_DINODE_FMT_BTREE && XFS_IFORK_FORMAT(ip, w) != XFS_DINODE_FMT_EXTENTS + !xfs_ifork_has_extents(ip, w) @@ expression ip, w; @@ - (xfs_ifork_has_extents(ip, w)) + xfs_ifork_has_extents(ip, w) @@ expression ip, w; @@ - (!xfs_ifork_has_extents(ip, w)) + !xfs_ifork_has_extents(ip, w) Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-10xfs: clean up weird while loop in xfs_alloc_ag_vextent_nearDarrick J. Wong
Refactor the weird while loop out of existence. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-10xfs: annotate functions that trip static checker locking checksDarrick J. Wong
Add some lock annotations to helper functions that seem to have unbalanced locking that confuses the static analyzers. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-10xfs: Correct comment tyops -> typosJoe Perches
Just fix the typos checkpatch notices... Signed-off-by: Joe Perches <joe@perches.com> Reviewed-by: Bill O'Donnell <billodo@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-07xfs: range check ri_cnt when recovering log itemsDarrick J. Wong
Range check the region counter when we're reassembling regions from log items during log recovery. In the old days ASSERT would halt the kernel, but this isn't true any more so we have to make an explicit error return. Coverity-id: 1132508 Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-07xfs: "optimize" buffer item log segment bitmap settingDarrick J. Wong
Optimize the setting of full words of bits in xfs_buf_item_log_segment. The optimization is purely within the bug triage process. No functional changes. Coverity-id: 1446793 Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-07xfs: null out bma->prev if no previous extentDarrick J. Wong
Coverity complains that we don't check the return value of xfs_iext_peek_prev_extent like we do nearly all of the time. If there is no previous extent then just null out bma->prev like we do elsewhere in the bmap code. Coverity-id: 1424057 Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-07xfs: fix missing header includesDarrick J. Wong
Some of the xfs source files are missing header includes, so add them back. Sparse complains about non-static functions that don't have a forward declaration anywhere. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-07xfs: periodically yield scrub threads to the schedulerDarrick J. Wong
Christoph Hellwig complained about the following soft lockup warning when running scrub after generic/175 when preemption is disabled and slub debugging is enabled: watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [xfs_scrub:161] Modules linked in: irq event stamp: 41692326 hardirqs last enabled at (41692325): [<ffffffff8232c3b7>] _raw_0 hardirqs last disabled at (41692326): [<ffffffff81001c5a>] trace0 softirqs last enabled at (41684994): [<ffffffff8260031f>] __do_e softirqs last disabled at (41684987): [<ffffffff81127d8c>] irq_e0 CPU: 3 PID: 16189 Comm: xfs_scrub Not tainted 5.4.0-rc3+ #30 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.124 RIP: 0010:_raw_spin_unlock_irqrestore+0x39/0x40 Code: 89 f3 be 01 00 00 00 e8 d5 3a e5 fe 48 89 ef e8 ed 87 e5 f2 RSP: 0018:ffffc9000233f970 EFLAGS: 00000286 ORIG_RAX: ffffffffff3 RAX: ffff88813b398040 RBX: 0000000000000286 RCX: 0000000000000006 RDX: 0000000000000006 RSI: ffff88813b3988c0 RDI: ffff88813b398040 RBP: ffff888137958640 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffea00042b0c00 R13: 0000000000000001 R14: ffff88810ac32308 R15: ffff8881376fc040 FS: 00007f6113dea700(0000) GS:ffff88813bb80000(0000) knlGS:00000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6113de8ff8 CR3: 000000012f290000 CR4: 00000000000006e0 Call Trace: free_debug_processing+0x1dd/0x240 __slab_free+0x231/0x410 kmem_cache_free+0x30e/0x360 xchk_ag_btcur_free+0x76/0xb0 xchk_ag_free+0x10/0x80 xchk_bmap_iextent_xref.isra.14+0xd9/0x120 xchk_bmap_iextent+0x187/0x210 xchk_bmap+0x2e0/0x3b0 xfs_scrub_metadata+0x2e7/0x500 xfs_ioc_scrub_metadata+0x4a/0xa0 xfs_file_ioctl+0x58a/0xcd0 do_vfs_ioctl+0xa0/0x6f0 ksys_ioctl+0x5b/0x90 __x64_sys_ioctl+0x11/0x20 do_syscall_64+0x4b/0x1a0 entry_SYSCALL_64_after_hwframe+0x49/0xbe If preemption is disabled, all metadata buffers needed to perform the scrub are already in memory, and there are a lot of records to check, it's possible that the scrub thread will run for an extended period of time without sleeping for IO or any other reason. Then the watchdog timer or the RCU stall timeout can trigger, producing the backtrace above. To fix this problem, call cond_resched() from the scrub thread so that we back out to the scheduler whenever necessary. Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-11-06xfs: remove redundant assignment to variable errorColin Ian King
Variable error is being initialized with a value that is never read and is being re-assigned a couple of statements later on. The assignment is redundant and hence can be removed. Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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