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ceph: do not assume r_old_dentry[_dir] always set together 

Do not assume that r_old_dentry implies that r_old_dentry_dir is also
true.  Separate out the ref cleanup and make the debugs dump behave when
it is NULL.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
This commit is contained in:
Sage Weil 2013-02-05 13:40:09 -08:00 committed by Yan, Zheng
parent 752c8bdcfe
commit 844d87c332
2 changed files with 6 additions and 4 deletions
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3
fs/ceph/debugfs.c
View File

@ -102,7 +102,8 @@ static int mdsc_show(struct seq_file *s, void *p)
path = NULL;
spin_lock(&req->r_old_dentry->d_lock);
seq_printf(s, " #%llx/%.*s (%s)",
ceph_ino(req->r_old_dentry_dir),
req->r_old_dentry_dir ?
ceph_ino(req->r_old_dentry_dir) : 0,
req->r_old_dentry->d_name.len,
req->r_old_dentry->d_name.name,
path ? path : "");

7
fs/ceph/mds_client.c
View File

@ -528,7 +528,9 @@ void ceph_mdsc_release_request(struct kref *kref)
iput(req->r_target_inode);
if (req->r_dentry)
dput(req->r_dentry);
if (req->r_old_dentry) {
if (req->r_old_dentry)
dput(req->r_old_dentry);
if (req->r_old_dentry_dir) {
/*
* track (and drop pins for) r_old_dentry_dir
* separately, since r_old_dentry's d_parent may have
@ -537,7 +539,6 @@ void ceph_mdsc_release_request(struct kref *kref)
*/
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);
@ -2053,7 +2054,7 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
ceph_get_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN);
if (req->r_locked_dir)
ceph_get_cap_refs(ceph_inode(req->r_locked_dir), CEPH_CAP_PIN);
if (req->r_old_dentry)
if (req->r_old_dentry_dir)
ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir),
CEPH_CAP_PIN);