[PATCH] knfsd: consolidate common code for statd->lockd notification

Common code from nlm4svc_proc_sm_notify and nlmsvc_proc_sm_notify is moved
into a new nlm_host_rebooted.

This is in preparation of a patch that will change the reboot notification
handling entirely.

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, 28 insertions, 2 deletions

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 637ec95..bcc21b0 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -39,7 +39,7 @@ static void			nlm_gc_hosts(void);
  * Find an NLM server handle in the cache. If there is none, create it.
  */
 struct nlm_host *
-nlmclnt_lookup_host(struct sockaddr_in *sin, int proto, int version)
+nlmclnt_lookup_host(const struct sockaddr_in *sin, int proto, int version)
 {
 	return nlm_lookup_host(0, sin, proto, version);
 }
@@ -58,7 +58,7 @@ nlmsvc_lookup_host(struct svc_rqst *rqstp)
  * Common host lookup routine for server & client
  */
 struct nlm_host *
-nlm_lookup_host(int server, struct sockaddr_in *sin,
+nlm_lookup_host(int server, const struct sockaddr_in *sin,
 					int proto, int version)
 {
 	struct nlm_host	*host, **hp;
@@ -260,6 +260,32 @@ void nlm_release_host(struct nlm_host *host)
 }
 
 /*
+ * We were notified that the host indicated by address &sin
+ * has rebooted.
+ * Release all resources held by that peer.
+ */
+void nlm_host_rebooted(const struct sockaddr_in *sin, const struct nlm_reboot *argp)
+{
+	struct nlm_host *host;
+
+	/* Obtain the host pointer for this NFS server and try to
+	 * reclaim all locks we hold on this server.
+	 */
+	if ((argp->proto & 1)==0) {
+		/* We are client, he's the server: try to reclaim all locks. */
+		if ((host = nlmclnt_lookup_host(sin, argp->proto >> 1, argp->vers)) == NULL)
+			return;
+		nlmclnt_recovery(host, argp->state);
+	} else {
+		/* He's the client, we're the server: delete all locks held by the client */
+		if ((host = nlm_lookup_host(1, sin, argp->proto >> 1, argp->vers)) == NULL)
+			return;
+		nlmsvc_free_host_resources(host);
+	}
+	nlm_release_host(host);
+}
+
+/*
  * Shut down the hosts module.
  * Note that this routine is called only at server shutdown time.
  */