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ceph: use pathlen values returned by set_request_path_attr 

We make copies of the dentry name in set_request_path_attr, but then
create_request_message re-fetches the lengths out of the dentry. While
we don't currently set the *_drop fields unless the parents are locked,
it's still better not to rely on that sort of implicit assumption.

Use the pathlen values that set_request_path_attr returned instead, as
they will always be correct for the returned paths themselves.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2019-04-17 14:23:17 -04:00 committed by Ilya Dryomov
parent f77f21bb28
commit c1dfc27723
1 changed files with 2 additions and 2 deletions
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4
fs/ceph/mds_client.c
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@ -2288,9 +2288,9 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
(!!req->r_inode_drop + !!req->r_dentry_drop +
!!req->r_old_inode_drop + !!req->r_old_dentry_drop);
if (req->r_dentry_drop)
len += req->r_dentry->d_name.len;
len += pathlen1;
if (req->r_old_dentry_drop)
len += req->r_old_dentry->d_name.len;
len += pathlen2;
msg = ceph_msg_new2(CEPH_MSG_CLIENT_REQUEST, len, 1, GFP_NOFS, false);
if (!msg) {