In order to simplify truncate operation on the file which
only has lower, we skip restoring mtime on copy-up for
regular file.
Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
---
fs/overlayfs/copy_up.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 0fed532efa68..8b92b3ba3c46 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -241,12 +241,17 @@ static int ovl_set_size(struct dentry *upperdentry, struct kstat *stat)
static int ovl_set_timestamps(struct dentry *upperdentry, struct kstat *stat)
{
- struct iattr attr = {
- .ia_valid =
- ATTR_ATIME | ATTR_MTIME | ATTR_ATIME_SET | ATTR_MTIME_SET,
- .ia_atime = stat->atime,
- .ia_mtime = stat->mtime,
- };
+ struct iattr attr;
+
+ if (S_ISREG(upperdentry->d_inode->i_mode)) {
+ attr.ia_valid = ATTR_ATIME | ATTR_ATIME_SET;
+ attr.ia_atime = stat->atime;
+ } else {
+ attr.ia_valid = ATTR_ATIME | ATTR_MTIME |
+ ATTR_ATIME_SET | ATTR_MTIME_SET;
+ attr.ia_atime = stat->atime;
+ attr.ia_mtime = stat->mtime;
+ }
return notify_change(upperdentry, &attr, NULL);
}
--
2.27.0
