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ceph: check if LOOKUPNAME request was aborted when filling trace 

d_lookup()/d_alloc() require parent inode locked. Parent inode is
not locked if request is aborted.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2018-09-28 11:34:42 +08:00 committed by Ilya Dryomov
parent c58f450bd6
commit 74c9e6bf4c
1 changed files with 3 additions and 1 deletions
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4
fs/ceph/inode.c
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@ -1200,7 +1200,9 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
WARN_ON_ONCE(1);
}
if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME &&
test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
struct qstr dname;
struct dentry *dn, *parent;