[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>

4 files changed, 35 insertions, 36 deletions

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 637ec9567066..bcc21b05808a 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.
  */
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index b5aceb83f8cb..97bd36c09a5b 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -420,10 +420,6 @@ nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
                                               void              *resp)
 {
         struct sockaddr_in      saddr = rqstp->rq_addr;
-        int                     vers = argp->vers;
-        int                     prot = argp->proto >> 1;
-
-        struct nlm_host         *host;
 
         dprintk("lockd: SM_NOTIFY     called\n");
         if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
@@ -438,21 +434,10 @@ nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
         /* Obtain the host pointer for this NFS server and try to
          * reclaim all locks we hold on this server.
          */
+        memset(&saddr, 0, sizeof(saddr));
         saddr.sin_addr.s_addr = argp->addr;
+        nlm_host_rebooted(&saddr, argp);
 
-        if ((argp->proto & 1)==0) {
-                if ((host = nlmclnt_lookup_host(&saddr, prot, vers)) != NULL) {
-                        nlmclnt_recovery(host, argp->state);
-                        nlm_release_host(host);
-                }
-        } else {
-                /* If we run on an NFS server, delete all locks held by the client */
-
-                if ((host = nlm_lookup_host(1, &saddr, prot, vers)) != NULL) {
-                        nlmsvc_free_host_resources(host);
-                        nlm_release_host(host);
-                }
-        }
         return rpc_success;
 }
 
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index dbc4ea2638c9..452eb5e5ea44 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -449,9 +449,6 @@ nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
                                               void              *resp)
 {
         struct sockaddr_in      saddr = rqstp->rq_addr;
-        int                     vers = argp->vers;
-        int                     prot = argp->proto >> 1;
-        struct nlm_host         *host;
 
         dprintk("lockd: SM_NOTIFY     called\n");
         if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
@@ -466,19 +463,9 @@ nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
         /* Obtain the host pointer for this NFS server and try to
          * reclaim all locks we hold on this server.
          */
+        memset(&saddr, 0, sizeof(saddr));
         saddr.sin_addr.s_addr = argp->addr;
-        if ((argp->proto & 1)==0) {
-                if ((host = nlmclnt_lookup_host(&saddr, prot, vers)) != NULL) {
-                        nlmclnt_recovery(host, argp->state);
-                        nlm_release_host(host);
-                }
-        } else {
-                /* If we run on an NFS server, delete all locks held by the client */
-                if ((host = nlm_lookup_host(1, &saddr, prot, vers)) != NULL) {
-                        nlmsvc_free_host_resources(host);
-                        nlm_release_host(host);
-                }
-        }
+        nlm_host_rebooted(&saddr, argp);
 
         return rpc_success;
 }
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 47b7dbd647a6..5f886695ac90 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -161,15 +161,16 @@ int		  nlmclnt_reclaim(struct nlm_host *, struct file_lock *);
 /*
  * Host cache
  */
-struct nlm_host * nlmclnt_lookup_host(struct sockaddr_in *, int, int);
+struct nlm_host * nlmclnt_lookup_host(const struct sockaddr_in *, int, int);
 struct nlm_host * nlmsvc_lookup_host(struct svc_rqst *);
-struct nlm_host * nlm_lookup_host(int server, struct sockaddr_in *, int, int);
+struct nlm_host * nlm_lookup_host(int server, const struct sockaddr_in *, int, int);
 struct rpc_clnt * nlm_bind_host(struct nlm_host *);
 void              nlm_rebind_host(struct nlm_host *);
 struct nlm_host * nlm_get_host(struct nlm_host *);
 void              nlm_release_host(struct nlm_host *);
 void              nlm_shutdown_hosts(void);
 extern struct nlm_host *nlm_find_client(void);
+extern void       nlm_host_rebooted(const struct sockaddr_in *, const struct nlm_reboot *);
 
 
 /*