1 files changed, 44 insertions, 21 deletions

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index a816b920d431..e0179f8c327f 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -24,13 +24,13 @@ static struct rpc_program	nsm_program;
 /*
  * Local NSM state
  */
-u32                             nsm_local_state;
+int                             nsm_local_state;
 
 /*
  * Common procedure for SM_MON/SM_UNMON calls
  */
 static int
-nsm_mon_unmon(struct nlm_host *host, u32 proc, struct nsm_res *res)
+nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
 {
         struct rpc_clnt *clnt;
         int             status;
@@ -46,10 +46,11 @@ nsm_mon_unmon(struct nlm_host *host, u32 proc, struct nsm_res *res)
                 goto out;
         }
 
-        args.addr = host->h_addr.sin_addr.s_addr;
-        args.proto= (host->h_proto<<1) | host->h_server;
+        memset(&args, 0, sizeof(args));
+        args.mon_name = nsm->sm_name;
+        args.addr = nsm->sm_addr.sin_addr.s_addr;
         args.prog = NLM_PROGRAM;
-        args.vers = host->h_version;
+        args.vers = 3;
         args.proc = NLMPROC_NSM_NOTIFY;
         memset(res, 0, sizeof(*res));
 
@@ -70,17 +71,22 @@ nsm_mon_unmon(struct nlm_host *host, u32 proc, struct nsm_res *res)
 int
 nsm_monitor(struct nlm_host *host)
 {
+        struct nsm_handle *nsm = host->h_nsmhandle;
         struct nsm_res  res;
         int             status;
 
         dprintk("lockd: nsm_monitor(%s)\n", host->h_name);
+        BUG_ON(nsm == NULL);
 
-        status = nsm_mon_unmon(host, SM_MON, &res);
+        if (nsm->sm_monitored)
+                return 0;
+
+        status = nsm_mon_unmon(nsm, SM_MON, &res);
 
         if (status < 0 || res.status != 0)
                 printk(KERN_NOTICE "lockd: cannot monitor %s\n", host->h_name);
         else
-                host->h_monitored = 1;
+                nsm->sm_monitored = 1;
         return status;
 }
 
@@ -90,16 +96,26 @@ nsm_monitor(struct nlm_host *host)
 int
 nsm_unmonitor(struct nlm_host *host)
 {
+        struct nsm_handle *nsm = host->h_nsmhandle;
         struct nsm_res  res;
-        int             status;
-
-        dprintk("lockd: nsm_unmonitor(%s)\n", host->h_name);
-
-        status = nsm_mon_unmon(host, SM_UNMON, &res);
-        if (status < 0)
-                printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", host->h_name);
-        else
-                host->h_monitored = 0;
+        int             status = 0;
+
+        if (nsm == NULL)
+                return 0;
+        host->h_nsmhandle = NULL;
+
+        if (atomic_read(&nsm->sm_count) == 1
+         && nsm->sm_monitored && !nsm->sm_sticky) {
+                dprintk("lockd: nsm_unmonitor(%s)\n", host->h_name);
+
+                status = nsm_mon_unmon(nsm, SM_UNMON, &res);
+                if (status < 0)
+                        printk(KERN_NOTICE "lockd: cannot unmonitor %s\n",
+                                        host->h_name);
+                else
+                        nsm->sm_monitored = 0;
+        }
+        nsm_release(nsm);
         return status;
 }
 
@@ -135,7 +151,7 @@ nsm_create(void)
 static u32 *
 xdr_encode_common(struct rpc_rqst *rqstp, u32 *p, struct nsm_args *argp)
 {
-        char    buffer[20];
+        char    buffer[20], *name;
 
         /*
          * Use the dotted-quad IP address of the remote host as
@@ -143,8 +159,13 @@ xdr_encode_common(struct rpc_rqst *rqstp, u32 *p, struct nsm_args *argp)
          * hostname first for whatever remote hostname it receives,
          * so this works alright.
          */
-        sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(argp->addr));
-        if (!(p = xdr_encode_string(p, buffer))
+        if (nsm_use_hostnames) {
+                name = argp->mon_name;
+        } else {
+                sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(argp->addr));
+                name = buffer;
+        }
+        if (!(p = xdr_encode_string(p, name))
          || !(p = xdr_encode_string(p, utsname()->nodename)))
                 return ERR_PTR(-EIO);
         *p++ = htonl(argp->prog);
@@ -160,9 +181,11 @@ xdr_encode_mon(struct rpc_rqst *rqstp, u32 *p, struct nsm_args *argp)
         p = xdr_encode_common(rqstp, p, argp);
         if (IS_ERR(p))
                 return PTR_ERR(p);
+
+        /* Surprise - there may even be room for an IPv6 address now */
         *p++ = argp->addr;
-        *p++ = argp->vers;
-        *p++ = argp->proto;
+        *p++ = 0;
+        *p++ = 0;
         *p++ = 0;
         rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
         return 0;