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| author | Sage Weil <sage@newdream.net> | 2011-07-26 11:31:14 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-07-26 11:31:14 -0700 |
| commit | 41b02e1f9bb87b07d792b64aaeb7af3d00d69cd2 (patch) | |
| tree | 87c9524ff96cbff2ff29d659cbefd516b553ca1f /fs/ceph/mds_client.c | |
| parent | 4f1772645296a230e04f5c53e79cfb6f841ce634 (diff) | |
| download | linux-41b02e1f9bb87b07d792b64aaeb7af3d00d69cd2.tar.gz linux-41b02e1f9bb87b07d792b64aaeb7af3d00d69cd2.tar.bz2 linux-41b02e1f9bb87b07d792b64aaeb7af3d00d69cd2.zip | |
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.c | 23 |
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); |