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cifs: dns resolution is needed only for primary channel

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When calling cifs_reconnect, before the connection to the
server is reestablished, the code today does a DNS resolution and
updates server->dstaddr.

However, this is not necessary for secondary channels. Secondary
channels use the interface list returned by the server to decide
which address to connect to. And that happens after tcon is reconnected
and server interfaces are requested.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Shyam Prasad N 2025-06-02 22:37:16 +05:30 committed by Steve French
parent c184689399
commit b4f60a053a
1 changed files with 2 additions and 1 deletions
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3
fs/smb/client/connect.c
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@ -392,7 +392,8 @@ static int __cifs_reconnect(struct TCP_Server_Info *server,
try_to_freeze();
cifs_server_lock(server);
if (!cifs_swn_set_server_dstaddr(server)) {
if (!cifs_swn_set_server_dstaddr(server) &&
!SERVER_IS_CHAN(server)) {
/* resolve the hostname again to make sure that IP address is up-to-date */
rc = reconn_set_ipaddr_from_hostname(server);
cifs_dbg(FYI, "%s: reconn_set_ipaddr_from_hostname: rc=%d\n", __func__, rc);