diff options
| author |   Steve French <stfrench@microsoft.com> | 2019-06-13 14:26:49 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2019-07-07 22:37:42 -0500 |
| commit | 43cdae88de2e8ec101961708ef7e51ba96776035 (patch) | |
| tree | 87ff14ba952874406dc968e6fce70c1eb0ab4e62 | |
| parent | cifs: add missing GCM module dependency (diff) | |
| download | linux-dev-43cdae88de2e8ec101961708ef7e51ba96776035.tar.xz linux-dev-43cdae88de2e8ec101961708ef7e51ba96776035.zip | |
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>
| -rw-r--r-- | fs/cifs/connect.c | 11 | ||||
| -rw-r--r-- | fs/cifs/smb1ops.c | 1 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.h | 1 |
3 files changed, 11 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, + SMBDEFAULT_VERSION_STRING) == 0) { + 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)) diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 9e430ae9314f..88ab87df8b3b 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -1233,6 +1233,7 @@ struct smb_version_operations smb1_operations = { struct smb_version_values smb1_values = { .version_string = SMB1_VERSION_STRING, + .protocol_id = SMB10_PROT_ID, .large_lock_type = LOCKING_ANDX_LARGE_FILES, .exclusive_lock_type = 0, .shared_lock_type = LOCKING_ANDX_SHARED_LOCK, diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index c09d9244b728..fa8c12a21f1b 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -227,6 +227,7 @@ struct smb2_negotiate_req { } __packed; /* Dialects */ +#define SMB10_PROT_ID 0x0000 /* local only, not sent on wire w/CIFS negprot */ #define SMB20_PROT_ID 0x0202 #define SMB21_PROT_ID 0x0210 #define SMB30_PROT_ID 0x0300 |