path: root/fs/cifs/connect.c
diff options
authorSteve French <stfrench@microsoft.com>2019-06-13 14:26:49 -0500
committerSteve French <stfrench@microsoft.com>2019-07-07 22:37:42 -0500
commit43cdae88de2e8ec101961708ef7e51ba96776035 (patch)
tree87ff14ba952874406dc968e6fce70c1eb0ab4e62 /fs/cifs/connect.c
parentcifs: add missing GCM module dependency (diff)
Fix match_server check to allow for auto dialect negotiate
When using multidialect negotiate (default or specifying vers=3.0 which allows any smb3 dialect), fix how we check for an existing server session. Before this fix if you mounted a second time to the same server (e.g. a different share on the same server) we would only reuse the existing smb session if a single dialect were requested (e.g. specifying vers=2.1 or vers=3.0 or vers=3.1.1 on the mount command). If a default mount (e.g. not specifying vers=) is done then would always create a new socket connection and SMB3 (or SMB3.1.1) session each time we connect to a different share on the same server rather than reusing the existing one. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to '')
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 8dd6637a3cbb..51f272377ae1 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2544,8 +2544,15 @@ static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
if (vol->nosharesock)
return 0;
- /* BB update this for smb3any and default case */
- if ((server->vals != vol->vals) || (server->ops != vol->ops))
+ /* If multidialect negotiation see if existing sessions match one */
+ if (strcmp(vol->vals->version_string, SMB3ANY_VERSION_STRING) == 0) {
+ if (server->vals->protocol_id < SMB30_PROT_ID)
+ return 0;
+ } else if (strcmp(vol->vals->version_string,
+ if (server->vals->protocol_id < SMB21_PROT_ID)
+ return 0;
+ } else if ((server->vals != vol->vals) || (server->ops != vol->ops))
return 0;
if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))