The commit is pushed to "branch-rh7-3.10.0-229.7.2.vz7.8.x-ovz" and will appear
at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-229.7.2.vz7.8.2
------>
commit ca88f84ba4810d4a9adc50c9455a3a5347fa3a88
Author: Dmitry Monakhov <[email protected]>
Date: Fri Oct 2 12:06:21 2015 +0400
pfcache/ext4: drop pfcache csum on fallocate
If fallocate changes file's data we have to drop csum.
https://jira.sw.ru/browse/PSBM-33644
Signed-off-by: Dmitry Monakhov <[email protected]>
---
fs/ext4/extents.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 08b0709..bac9339 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5062,6 +5062,11 @@ long ext4_fallocate(struct file *file, int mode, loff_t
offset, loff_t len)
FALLOC_FL_CONVERT_AND_EXTEND))
return -EOPNOTSUPP;
+ /* If data is about to change we must drop csum */
+ if (ext4_test_inode_state(inode, EXT4_STATE_PFCACHE_CSUM) &&
+ ((mode & ~FALLOC_FL_KEEP_SIZE) || !(mode & FALLOC_FL_KEEP_SIZE)))
+ ext4_truncate_data_csum(inode, -1);
+
if (mode & FALLOC_FL_PUNCH_HOLE)
return ext4_punch_hole(inode, offset, len);
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