1 files changed, 43 insertions, 25 deletions

diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 23da3fa69efa..aa6fe7026de7 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -43,8 +43,8 @@ struct nlm_host {
         struct sockaddr_storage h_addr;         /* peer address */
         size_t                  h_addrlen;
         struct sockaddr_storage h_srcaddr;      /* our address (optional) */
-        struct rpc_clnt *       h_rpcclnt;      /* RPC client to talk to peer */
-        char *                  h_name;         /* remote hostname */
+        struct rpc_clnt         *h_rpcclnt;     /* RPC client to talk to peer */
+        char                    *h_name;                /* remote hostname */
         u32                     h_version;      /* interface version */
         unsigned short          h_proto;        /* transport proto */
         unsigned short          h_reclaiming : 1,
@@ -64,21 +64,29 @@ struct nlm_host {
         spinlock_t              h_lock;
         struct list_head        h_granted;      /* Locks in GRANTED state */
         struct list_head        h_reclaim;      /* Locks in RECLAIM state */
-        struct nsm_handle *     h_nsmhandle;    /* NSM status handle */
-
-        char                    h_addrbuf[48],  /* address eyecatchers */
-                                h_srcaddrbuf[48];
+        struct nsm_handle       *h_nsmhandle;   /* NSM status handle */
+        char                    *h_addrbuf;     /* address eyecatcher */
 };
 
+/*
+ * The largest string sm_addrbuf should hold is a full-size IPv6 address
+ * (no "::" anywhere) with a scope ID.  The buffer size is computed to
+ * hold eight groups of colon-separated four-hex-digit numbers, a
+ * percent sign, a scope id (at most 32 bits, in decimal), and NUL.
+ */
+#define NSM_ADDRBUF             ((8 * 4 + 7) + (1 + 10) + 1)
+
 struct nsm_handle {
         struct list_head        sm_link;
         atomic_t                sm_count;
-        char *                  sm_name;
+        char                    *sm_mon_name;
+        char                    *sm_name;
         struct sockaddr_storage sm_addr;
         size_t                  sm_addrlen;
         unsigned int            sm_monitored : 1,
                                 sm_sticky : 1;  /* don't unmonitor */
-        char                    sm_addrbuf[48]; /* address eyecatcher */
+        struct nsm_private      sm_priv;
+        char                    sm_addrbuf[NSM_ADDRBUF];
 };
 
 /*
@@ -104,16 +112,6 @@ static inline struct sockaddr *nlm_srcaddr(const struct nlm_host *host)
         return (struct sockaddr *)&host->h_srcaddr;
 }
 
-static inline struct sockaddr_in *nsm_addr_in(const struct nsm_handle *handle)
-{
-        return (struct sockaddr_in *)&handle->sm_addr;
-}
-
-static inline struct sockaddr *nsm_addr(const struct nsm_handle *handle)
-{
-        return (struct sockaddr *)&handle->sm_addr;
-}
-
 /*
  * Map an fl_owner_t into a unique 32-bit "pid"
  */
@@ -197,6 +195,7 @@ extern struct svc_procedure	nlmsvc_procedures4[];
 extern int                      nlmsvc_grace_period;
 extern unsigned long            nlmsvc_timeout;
 extern int                      nsm_use_hostnames;
+extern int                      nsm_local_state;
 
 /*
  * Lockd client functions
@@ -231,10 +230,20 @@ 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 void       nlm_host_rebooted(const struct sockaddr_in *, const char *,
-                                        unsigned int, u32);
-void              nsm_release(struct nsm_handle *);
+void              nlm_host_rebooted(const struct nlm_reboot *);
 
+/*
+ * Host monitoring
+ */
+int               nsm_monitor(const struct nlm_host *host);
+void              nsm_unmonitor(const struct nlm_host *host);
+
+struct nsm_handle *nsm_get_handle(const struct sockaddr *sap,
+                                        const size_t salen,
+                                        const char *hostname,
+                                        const size_t hostname_len);
+struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info);
+void              nsm_release(struct nsm_handle *nsm);
 
 /*
  * This is used in garbage collection and resource reclaim
@@ -282,16 +291,25 @@ static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)
 static inline int __nlm_privileged_request4(const struct sockaddr *sap)
 {
         const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
-        return (sin->sin_addr.s_addr == htonl(INADDR_LOOPBACK)) &&
-                        (ntohs(sin->sin_port) < 1024);
+
+        if (ntohs(sin->sin_port) > 1023)
+                return 0;
+
+        return ipv4_is_loopback(sin->sin_addr.s_addr);
 }
 
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 static inline int __nlm_privileged_request6(const struct sockaddr *sap)
 {
         const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
-        return (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK) &&
-                        (ntohs(sin6->sin6_port) < 1024);
+
+        if (ntohs(sin6->sin6_port) > 1023)
+                return 0;
+
+        if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED)
+                return ipv4_is_loopback(sin6->sin6_addr.s6_addr32[3]);
+
+        return ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK;
 }
 #else   /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
 static inline int __nlm_privileged_request6(const struct sockaddr *sap)