[PATCH 3.16 153/366] ceph: always update atime/mtime/ctime for new inode

Ben Hutchings
2018-10-14T23:11:42Z

From: "Yan, Zheng" <zyan@redhat.com>

commit ffdeec7aa41aa61ca4ee68fddf4669df9ce661d1 upstream.

For new inode, atime/mtime/ctime are uninitialized. Don't compare
against them.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
fs/ceph/inode.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -599,13 +599,15 @@ void ceph_fill_file_time(struct inode *i
CEPH_CAP_FILE_BUFFER|
CEPH_CAP_AUTH_EXCL|
CEPH_CAP_XATTR_EXCL)) {
- if (timespec_compare(ctime, &inode->i_ctime) > 0) {
+ if (ci->i_version == 0 ||
+ timespec_compare(ctime, &inode->i_ctime) > 0) {
dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
ctime->tv_sec, ctime->tv_nsec);
inode->i_ctime = *ctime;
}
- if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
+ if (ci->i_version == 0 ||
+ ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
/* the MDS did a utimes() */
dout("mtime %ld.%09ld -> %ld.%09ld "
"tw %d -> %d\n",
@@ -719,7 +721,6 @@ static int fill_inode(struct inode *inod
new_issued = ~issued & le32_to_cpu(info->cap.caps);

/* update inode */
- ci->i_version = le64_to_cpu(info->version);
inode->i_version++;
inode->i_rdev = le32_to_cpu(info->rdev);
inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
@@ -779,6 +780,9 @@ static int fill_inode(struct inode *inod
xattr_blob = NULL;
}

+ /* finally update i_version */
+ ci->i_version = le64_to_cpu(info->version);
+
inode->i_mapping->a_ops = &ceph_aops;
inode->i_mapping->backing_dev_info =
&ceph_sb_to_client(inode->i_sb)->backing_dev_info;