[PATCH] knfsd: lockd: make nlm_traverse_* more flexible

This patch makes nlm_traverse{locks,blocks,shares} and friends use a function
pointer rather than a "action" enum.

This function pointer is given two nlm_hosts (one given by the caller, the
other taken from the lock/block/share currently visited), and is free to do
with them as it wants.  If it returns a non-zero value, the lockd/block/share
is released.

Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 8 deletions

diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 777a91e1ac8f..8c1145669d06 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -134,13 +134,6 @@ struct nlm_block {
 };
 
 /*
- * Valid actions for nlmsvc_traverse_files
- */
-#define NLM_ACT_CHECK           0               /* check for locks */
-#define NLM_ACT_MARK            1               /* mark & sweep */
-#define NLM_ACT_UNLOCK          2               /* release all locks */
-
-/*
  * Global variables
  */
 extern struct rpc_program       nlm_program;
@@ -183,6 +176,12 @@ void		  nsm_release(struct nsm_handle *);
 
 
 /*
+ * This is used in garbage collection and resource reclaim
+ * A return value != 0 means destroy the lock/block/share
+ */
+typedef int       (*nlm_host_match_fn_t)(struct nlm_host *cur, struct nlm_host *ref);
+
+/*
  * Server-side lock handling
  */
 u32               nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
@@ -193,7 +192,7 @@ u32		  nlmsvc_testlock(struct nlm_file *, struct nlm_lock *,
 u32               nlmsvc_cancel_blocked(struct nlm_file *, struct nlm_lock *);
 unsigned long     nlmsvc_retry_blocked(void);
 void              nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *,
-                                        int action);
+                                        nlm_host_match_fn_t match);
 void      nlmsvc_grant_reply(struct svc_rqst *, struct nlm_cookie *, u32);
 
 /*