NLM: Introduce an arguments structure for nlmclnt_init()

Clean up: pass 5 arguments to nlmclnt_init() in a structure similar to the
new nfs_client_initdata structure.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

3 files changed, 32 insertions, 26 deletions

diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index 9a8f4f45c19e..0b45fd3a4bfd 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -43,31 +43,25 @@ static LIST_HEAD(nlm_blocked);
 
 /**
  * nlmclnt_init - Set up per-NFS mount point lockd data structures
- * @server_name: server's hostname
- * @server_address: server's network address
- * @server_addrlen: length of server's address
- * @protocol: transport protocol lockd should use
- * @nfs_version: NFS protocol version for this mount point
+ * @nlm_init: pointer to arguments structure
  *
  * Returns pointer to an appropriate nlm_host struct,
  * or an ERR_PTR value.
  */
-struct nlm_host *nlmclnt_init(const char *server_name,
-                              const struct sockaddr *server_address,
-                              size_t server_addrlen,
-                              unsigned short protocol, u32 nfs_version)
+struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
 {
         struct nlm_host *host;
-        u32 nlm_version = (nfs_version == 2) ? 1 : 4;
+        u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
         int status;
 
-        status = lockd_up(protocol);
+        status = lockd_up(nlm_init->protocol);
         if (status < 0)
                 return ERR_PTR(status);
 
-        host = nlmclnt_lookup_host((struct sockaddr_in *)server_address,
-                                   protocol, nlm_version,
-                                   server_name, strlen(server_name));
+        host = nlmclnt_lookup_host((struct sockaddr_in *)nlm_init->address,
+                                   nlm_init->protocol, nlm_version,
+                                   nlm_init->hostname,
+                                   strlen(nlm_init->hostname));
         if (host == NULL) {
                 lockd_down();
                 return ERR_PTR(-ENOLCK);
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 0b3ce86f6fc9..7a15832369e9 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -468,18 +468,21 @@ static int nfs_start_lockd(struct nfs_server *server)
 {
         struct nlm_host *host;
         struct nfs_client *clp = server->nfs_client;
-        u32 nfs_version = clp->rpc_ops->version;
-        unsigned short protocol = server->flags & NFS_MOUNT_TCP ?
-                                                IPPROTO_TCP : IPPROTO_UDP;
+        struct nlmclnt_initdata nlm_init = {
+                .hostname       = clp->cl_hostname,
+                .address        = (struct sockaddr *)&clp->cl_addr,
+                .addrlen        = clp->cl_addrlen,
+                .protocol       = server->flags & NFS_MOUNT_TCP ?
+                                                IPPROTO_TCP : IPPROTO_UDP,
+                .nfs_version    = clp->rpc_ops->version,
+        };
 
-        if (nfs_version > 3)
+        if (nlm_init.nfs_version > 3)
                 return 0;
         if (server->flags & NFS_MOUNT_NONLM)
                 return 0;
 
-        host = nlmclnt_init(clp->cl_hostname,
-                            (struct sockaddr *)&clp->cl_addr,
-                            clp->cl_addrlen, protocol, nfs_version);
+        host = nlmclnt_init(&nlm_init);
         if (IS_ERR(host))
                 return PTR_ERR(host);
 
diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index 73368075af03..3d25bcd139d1 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -33,13 +33,22 @@ struct nlmsvc_binding {
 extern struct nlmsvc_binding *  nlmsvc_ops;
 
 /*
+ * Similar to nfs_client_initdata, but without the NFS-specific
+ * rpc_ops field.
+ */
+struct nlmclnt_initdata {
+        const char              *hostname;
+        const struct sockaddr   *address;
+        size_t                  addrlen;
+        unsigned short          protocol;
+        u32                     nfs_version;
+};
+
+/*
  * Functions exported by the lockd module
  */
-extern struct nlm_host *nlmclnt_init(const char *server_name,
-                                        const struct sockaddr *server_address,
-                                        size_t server_addrlen,
-                                        unsigned short protocol,
-                                        u32 nfs_version);
+
+extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init);
 extern void     nlmclnt_done(struct nlm_host *host);
 
 extern int      nlmclnt_proc(struct nlm_host *host, int cmd,