[PATCH 4/4] ceph: release unused cap reservation on readdir error

[deepakraog <gaikwad.dcg@gmail.com>]

ceph_readdir_prepopulate() can exit with an error after partially
consuming the request's cap reservation. Return unused reserved caps to
the MDS client pool on the error path so they are not held until request
teardown.

Signed-off-by: deepakraog <gaikwad.dcg@gmail.com>
---
 fs/ceph/inode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 61d7c0b81..2d6a80054 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2188,6 +2188,8 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
 		dput(dn);
 	}
 out:
+	if (err)
+		ceph_unreserve_caps(req->r_mdsc, &req->r_caps_reservation);
 	if (err == 0 && skipped == 0) {
 		set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
 		req->r_readdir_cache_idx = cache_ctl.index;
-- 
Deepak Rao Gaikwad