[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>
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 777a91e..8c11456 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -134,13 +134,6 @@
};
/*
- * 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 @@
/*
+ * 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_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);
/*
diff --git a/include/linux/lockd/share.h b/include/linux/lockd/share.h
index c75a424..cd7816e 100644
--- a/include/linux/lockd/share.h
+++ b/include/linux/lockd/share.h
@@ -25,6 +25,7 @@
struct nlm_args *);
u32 nlmsvc_unshare_file(struct nlm_host *, struct nlm_file *,
struct nlm_args *);
-void nlmsvc_traverse_shares(struct nlm_host *, struct nlm_file *, int);
+void nlmsvc_traverse_shares(struct nlm_host *, struct nlm_file *,
+ nlm_host_match_fn_t);
#endif /* LINUX_LOCKD_SHARE_H */