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linux-stable/fs/btrfs
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Filipe Manana 9f13ce743b Btrfs: fix missing inode i_size update after zero range operation 
For a fallocate's zero range operation that targets a range with an end
that is not aligned to the sector size, we can end up not updating the
inode's i_size. This happens when the last page of the range maps to an
unwritten (prealloc) extent and before that last page we have either a
hole or a written extent. This is because in this scenario we relied
on a call to btrfs_prealloc_file_range() to update the inode's i_size,
however it can only update the i_size to the "down aligned" end of the
range.

Example:

 $ mkfs.btrfs -f /dev/sdc
 $ mount /dev/sdc /mnt
 $ xfs_io -f -c "pwrite -S 0xff 0 428K" /mnt/foobar
 $ xfs_io -c "falloc -k 428K 4K" /mnt/foobar
 $ xfs_io -c "fzero 0 430K" /mnt/foobar
 $ du --bytes /mnt/foobar
 438272	/mnt/foobar

The inode's i_size was left as 428Kb (438272 bytes) when it should have
been updated to 430Kb (440320 bytes).
Fix this by always updating the inode's i_size explicitly after zeroing
the range.

Fixes: ba6d5887946ff86d93dc ("Btrfs: add support for fallocate's zero range operation")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-01-22 16:08:20 +01:00
..
tests btrfs: Remove redundant FLAG_VACANCY 2018-01-22 16:08:14 +01:00
acl.c btrfs: preserve i_mode if __btrfs_set_acl() fails 2017-08-21 17:47:42 +02:00
async-thread.c Btrfs: fix confusing worker helper info in stacktrace 2017-10-30 12:27:57 +01:00
async-thread.h btrfs: constify tracepoint arguments 2017-08-16 14:19:53 +02:00
backref.c btrfs: make function update_share_count static 2018-01-22 16:08:14 +01:00
backref.h btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents 2017-11-01 20:45:34 +01:00
btrfs_inode.h btrfs: make the delalloc block rsv per inode 2017-11-01 20:45:35 +01:00
check-integrity.c btrfs: Fix bug for misused dev_t when lookup in dev state hash table. 2017-11-01 20:45:36 +01:00
check-integrity.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
compression.c btrfs: Remove redundant bio_get/set calls in compressed read/write paths 2018-01-22 16:08:19 +01:00
compression.h btrfs: compression: add helper for type to string conversion 2018-01-22 16:08:16 +01:00
ctree.c btrfs: Improve btrfs_search_slot description 2018-01-22 16:08:19 +01:00
ctree.h Btrfs: remove unused wait in btrfs_stripe_hash 2018-01-22 16:08:19 +01:00
dedupe.h
delayed-inode.c btrfs: Move checks from btrfs_wq_run_delayed_node to btrfs_balance_delayed_items 2018-01-22 16:08:11 +01:00
delayed-inode.h btrfs: convert btrfs_delayed_item.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
delayed-ref.c Btrfs: add __init macro to btrfs init functions 2018-01-22 16:08:11 +01:00
delayed-ref.h Btrfs: add __init macro to btrfs init functions 2018-01-22 16:08:11 +01:00
dev-replace.c btrfs: cleanup device states define BTRFS_DEV_STATE_REPLACE_TGT 2018-01-22 16:08:15 +01:00
dev-replace.h btrfs: constify device path passed to relevant helpers 2017-02-28 14:26:07 +01:00
dir-item.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
disk-io.c btrfs: factor btrfs_check_rw_degradable() to check given device 2018-01-22 16:08:20 +01:00
disk-io.h btrfs: sink get_extent parameter to read_extent_buffer_pages 2018-01-22 16:08:13 +01:00
export.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
export.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extent-tree.c btrfs: cleanup device states define BTRFS_DEV_STATE_REPLACE_TGT 2018-01-22 16:08:15 +01:00
extent_io.c btrfs: sink unlock_extent parameter gfp_flags 2018-01-22 16:08:19 +01:00
extent_io.h btrfs: sink unlock_extent parameter gfp_flags 2018-01-22 16:08:19 +01:00
extent_map.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extent_map.h btrfs: Remove redundant FLAG_VACANCY 2018-01-22 16:08:14 +01:00
file-item.c Merge branch 'for-4.13-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-07-05 16:41:23 -07:00
file.c Btrfs: fix missing inode i_size update after zero range operation 2018-01-22 16:08:20 +01:00
free-space-cache.c btrfs: sink unlock_extent parameter gfp_flags 2018-01-22 16:08:19 +01:00
free-space-cache.h btrfs: free-space-cache, clean up unnecessary root arguments 2017-02-17 12:03:56 +01:00
free-space-tree.c btrfs: Clean up unused variables in free-space-tree.c 2017-10-30 12:27:59 +01:00
free-space-tree.h btrfs: expose internal free space tree routine only if sanity tests are enabled 2017-08-18 16:36:29 +02:00
hash.c crypto: Work around deallocated stack frame reference gcc bug on sparc. 2017-06-08 17:36:03 +08:00
hash.h
inode-item.c btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
inode-map.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
inode-map.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
inode.c btrfs: sink unlock_extent parameter gfp_flags 2018-01-22 16:08:19 +01:00
ioctl.c btrfs: sink unlock_extent parameter gfp_flags 2018-01-22 16:08:19 +01:00
Kconfig Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
locking.c
locking.h
lzo.c btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00
Makefile Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-11-14 13:35:29 -08:00
math.h
ordered-data.c Btrfs: rework outstanding_extents 2017-11-01 20:45:35 +01:00
ordered-data.h btrfs: fix integer overflow in calc_reclaim_items_nr 2017-06-29 20:17:02 +02:00
orphan.c
print-tree.c Btrfs: add one more sanity check for shared ref type 2017-08-21 17:47:43 +02:00
print-tree.h btrfs: get fs_info from eb in btrfs_print_tree, remove argument 2017-08-16 16:12:03 +02:00
props.c btrfs: prop: use common helper for type to string conversion 2018-01-22 16:08:16 +01:00
props.h
qgroup.c btrfs: sink gfp parameter to clear_extent_bit 2018-01-22 16:08:12 +01:00
qgroup.h btrfs: qgroup: Fix qgroup reserved space underflow by only freeing reserved ranges 2017-06-29 20:17:02 +02:00
raid56.c Btrfs: do not merge rbios if their fail stripe index are not identical 2018-01-22 16:08:20 +01:00
raid56.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
rcu-string.h
reada.c btrfs: remove unused member err from reada_extent 2017-06-19 18:25:59 +02:00
ref-verify.c btrfs: ref-verify: Remove unused parameter from walk_up_tree() to kill warning 2018-01-22 16:08:13 +01:00
ref-verify.h Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
relocation.c Btrfs: fix reported number of inode blocks after buffered append writes 2017-11-15 17:27:46 +01:00
root-tree.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
scrub.c btrfs: rename btrfs_device::scrub_device to scrub_ctx 2018-01-22 16:08:20 +01:00
send.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
send.h btrfs: fix send ioctl on 32bit with 64bit kernel 2017-10-30 12:27:59 +01:00
struct-funcs.c btrfs: struct-funcs, constify readers 2017-08-16 14:19:53 +02:00
super.c btrfS: collapse btrfs_handle_error() into __btrfs_handle_fs_error() 2018-01-22 16:08:20 +01:00
sysfs.c Btrfs: add __init macro to btrfs init functions 2018-01-22 16:08:11 +01:00
sysfs.h Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-11-14 13:35:29 -08:00
transaction.c btrfs: simplify mutex unlocking code in btrfs_commit_transaction 2018-01-22 16:08:20 +01:00
transaction.h btrfs: reorder btrfs_transaction members for better packing 2018-01-22 16:08:14 +01:00
tree-checker.c btrfs: tree-checker: use %zu format string for size_t 2018-01-22 16:08:15 +01:00
tree-checker.h btrfs: tree-checker: Fix false panic for sanity test 2017-11-28 14:59:09 +01:00
tree-defrag.c
tree-log.c btrfs: btrfs_inode_log_parent should use defined inode_only values. 2018-01-22 16:08:14 +01:00
tree-log.h btrfs: Make btrfs_del_inode_ref take btrfs_inode 2017-02-14 15:50:54 +01:00
ulist.c btrfs: ulist: rename ulist_fini to ulist_release 2017-02-17 12:03:50 +01:00
ulist.h btrfs: ulist: rename ulist_fini to ulist_release 2017-02-17 12:03:50 +01:00
uuid-tree.c btrfs: return the actual error value from from btrfs_uuid_tree_iterate 2016-12-19 18:08:15 +01:00
volumes.c btrfs: minor style cleanups in btrfs_scan_one_device 2018-01-22 16:08:20 +01:00
volumes.h btrfs: rename btrfs_device::scrub_device to scrub_ctx 2018-01-22 16:08:20 +01:00
xattr.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
xattr.h
zlib.c btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00
zstd.c btrfs: move some zstd work data from stack to workspace 2018-01-22 16:08:14 +01:00