diff options
| author | Jan Kara <jack@suse.com> | 2015-12-07 14:34:49 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-04 14:48:53 -0700 |
| commit | 21228341bf17496062b0e6a1b37265f6bcf5c8f3 (patch) | |
| tree | 380eb20f2d05cc635df80c5ff1ebdd3e4858e906 /fs/ext4/ext4.h | |
| parent | 1f7b7e9a4ba3d60af27c78a149743d269e6fb848 (diff) | |
ext4: fix races of writeback with punch hole and zero range
commit 011278485ecc3cd2a3954b5d4c73101d919bf1fa upstream.
When doing delayed allocation, update of on-disk inode size is postponed
until IO submission time. However hole punch or zero range fallocate
calls can end up discarding the tail page cache page and thus on-disk
inode size would never be properly updated.
Make sure the on-disk inode size is updated before truncating page
cache.
Signed-off-by: Jan Kara <jack@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 89df9f55595b..b7e921d207fb 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2881,6 +2881,9 @@ static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) return changed; } +int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, + loff_t len); + struct ext4_group_info { unsigned long bb_state; struct rb_root bb_free_root; |