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-rw-r--r--fs/lockd/clntlock.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index d070b18e539..9a8f4f45c19 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -41,6 +41,54 @@ struct nlm_wait {
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
+ *
+ * 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 *host;
+ u32 nlm_version = (nfs_version == 2) ? 1 : 4;
+ int status;
+
+ status = lockd_up(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));
+ if (host == NULL) {
+ lockd_down();
+ return ERR_PTR(-ENOLCK);
+ }
+
+ return host;
+}
+EXPORT_SYMBOL_GPL(nlmclnt_init);
+
+/**
+ * nlmclnt_done - Release resources allocated by nlmclnt_init()
+ * @host: nlm_host structure reserved by nlmclnt_init()
+ *
+ */
+void nlmclnt_done(struct nlm_host *host)
+{
+ nlm_release_host(host);
+ lockd_down();
+}
+EXPORT_SYMBOL_GPL(nlmclnt_done);
+
/*
* Queue up a lock for blocking so that the GRANTED request can see it
*/