ceph: clear parent D_COMPLETE flag when on dentry prune
When the VFS prunes a dentry from the cache, clear the D_COMPLETE flag
on the parent dentry. Do this for the live and snapshotted namespaces. Do
not bother for the .snap dir contents, since we do not cache that.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index b01442a..98e6069 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -203,6 +203,7 @@
* Ceph dentry state
*/
struct ceph_dentry_info {
+ unsigned long flags;
struct ceph_mds_session *lease_session;
u32 lease_gen, lease_shared_gen;
u32 lease_seq;
@@ -213,6 +214,18 @@
u64 offset;
};
+/*
+ * dentry flags
+ *
+ * The locking for D_COMPLETE is a bit odd:
+ * - we can clear it at almost any time (see ceph_d_prune)
+ * - it is only meaningful if:
+ * - we hold dir inode i_lock
+ * - we hold dir FILE_SHARED caps
+ * - the dentry D_COMPLETE is set
+ */
+#define CEPH_D_COMPLETE 1 /* if set, d_u.d_subdirs is complete directory */
+
struct ceph_inode_xattrs_info {
/*
* (still encoded) xattr blob. we avoid the overhead of parsing