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authorSage Weil <sage@newdream.net>2011-07-26 22:31:14 +0400
committerSage Weil <sage@newdream.net>2011-07-26 22:31:14 +0400
commit41b02e1f9bb87b07d792b64aaeb7af3d00d69cd2 (patch)
tree87c9524ff96cbff2ff29d659cbefd516b553ca1f /fs/ceph/mds_client.c
parent4f1772645296a230e04f5c53e79cfb6f841ce634 (diff)
downloadlinux-41b02e1f9bb87b07d792b64aaeb7af3d00d69cd2.tar.xz
ceph: explicitly reference rename old_dentry parent dir in request
We carry a pin on the parent directory for the rename source and dest dentries. For the source it's r_locked_dir; we need to explicitly reference the old_dentry parent as well, since the dentry's d_parent may change between when the request was created and pinned and when it is freed. Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/mds_client.c')
-rw-r--r--fs/ceph/mds_client.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 8a09cd5a659e..66a8939cc518 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -483,22 +483,26 @@ void ceph_mdsc_release_request(struct kref *kref)
destroy_reply_info(&req->r_reply_info);
}
if (req->r_inode) {
- ceph_put_cap_refs(ceph_inode(req->r_inode),
- CEPH_CAP_PIN);
+ ceph_put_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN);
iput(req->r_inode);
}
if (req->r_locked_dir)
- ceph_put_cap_refs(ceph_inode(req->r_locked_dir),
- CEPH_CAP_PIN);
+ ceph_put_cap_refs(ceph_inode(req->r_locked_dir), CEPH_CAP_PIN);
if (req->r_target_inode)
iput(req->r_target_inode);
if (req->r_dentry)
dput(req->r_dentry);
if (req->r_old_dentry) {
- ceph_put_cap_refs(
- ceph_inode(req->r_old_dentry->d_parent->d_inode),
- CEPH_CAP_PIN);
+ /*
+ * track (and drop pins for) r_old_dentry_dir
+ * separately, since r_old_dentry's d_parent may have
+ * changed between the dir mutex being dropped and
+ * this request being freed.
+ */
+ ceph_put_cap_refs(ceph_inode(req->r_old_dentry_dir),
+ CEPH_CAP_PIN);
dput(req->r_old_dentry);
+ iput(req->r_old_dentry_dir);
}
kfree(req->r_path1);
kfree(req->r_path2);
@@ -1931,9 +1935,8 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
if (req->r_locked_dir)
ceph_get_cap_refs(ceph_inode(req->r_locked_dir), CEPH_CAP_PIN);
if (req->r_old_dentry)
- ceph_get_cap_refs(
- ceph_inode(req->r_old_dentry->d_parent->d_inode),
- CEPH_CAP_PIN);
+ ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir),
+ CEPH_CAP_PIN);
/* issue */
mutex_lock(&mdsc->mutex);