diff mbox series

[09/11] cifs: Simplify reconnect code when dfs upcall is enabled

Message ID 20201022181339.30771-10-scabrero@suse.de
State New, archived
Headers show
Series Witness protocol support for transparent failover | expand

Commit Message

Samuel Cabrero Oct. 22, 2020, 6:13 p.m. UTC
Some witness notifications, like client move, tell the client to
reconnect to a specific IP address. In this situation the DFS failover
code path has to be skipped so clean up as much as possible the
cifs_reconnect() code.

Signed-off-by: Samuel Cabrero <scabrero@suse.de>
---
 fs/cifs/connect.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)
diff mbox series

Patch

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index cb9ca4238ae9..14bbec0aeccf 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -296,7 +296,7 @@  static void cifs_prune_tlinks(struct work_struct *work);
  * This should be called with server->srv_mutex held.
  */
 #ifdef CONFIG_CIFS_DFS_UPCALL
-static int reconn_set_ipaddr(struct TCP_Server_Info *server)
+static int reconn_set_ipaddr_from_hostname(struct TCP_Server_Info *server)
 {
 	int rc;
 	int len;
@@ -331,14 +331,7 @@  static int reconn_set_ipaddr(struct TCP_Server_Info *server)
 
 	return !rc ? -1 : 0;
 }
-#else
-static inline int reconn_set_ipaddr(struct TCP_Server_Info *server)
-{
-	return 0;
-}
-#endif
 
-#ifdef CONFIG_CIFS_DFS_UPCALL
 /* These functions must be called with server->srv_mutex held */
 static void reconn_set_next_dfs_target(struct TCP_Server_Info *server,
 				       struct cifs_sb_info *cifs_sb,
@@ -346,6 +339,7 @@  static void reconn_set_next_dfs_target(struct TCP_Server_Info *server,
 				       struct dfs_cache_tgt_iterator **tgt_it)
 {
 	const char *name;
+	int rc;
 
 	if (!cifs_sb || !cifs_sb->origin_fullpath)
 		return;
@@ -370,6 +364,12 @@  static void reconn_set_next_dfs_target(struct TCP_Server_Info *server,
 			 "%s: failed to extract hostname from target: %ld\n",
 			 __func__, PTR_ERR(server->hostname));
 	}
+
+	rc = reconn_set_ipaddr_from_hostname(server);
+	if (rc) {
+		cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n",
+			 __func__, rc);
+	}
 }
 
 static inline int reconn_setup_dfs_targets(struct cifs_sb_info *cifs_sb,
@@ -528,11 +528,6 @@  cifs_reconnect(struct TCP_Server_Info *server)
 		 */
 		reconn_set_next_dfs_target(server, cifs_sb, &tgt_list, &tgt_it);
 #endif
-		rc = reconn_set_ipaddr(server);
-		if (rc) {
-			cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n",
-				 __func__, rc);
-		}
 
 		if (cifs_rdma_enabled(server))
 			rc = smbd_reconnect(server);