cifs: add a "nosharesock" mount option to force new sockets to server to be created
Some servers set max_vcs to 1 and actually do enforce that limit. Add a
new mount option to work around this behavior that forces a mount
request to open a new socket to the server instead of reusing an
existing one.
I'd prefer to come up with a solution that doesn't require this, so
consider this a debug patch that you can use to determine whether this
is the real problem.
Cc: Jim McDonough <jmcd@samba.org>
Cc: Steve French <smfrench@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4f07f6f..db9f985 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -441,6 +441,7 @@
bool mfsymlinks:1; /* use Minshall+French Symlinks */
bool multiuser:1;
bool rwpidforward:1; /* pid forward for read/write operations */
+ bool nosharesock;
unsigned int rsize;
unsigned int wsize;
bool sockopt_tcp_nodelay:1;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e3bc39b..180d9b9 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -85,7 +85,7 @@
Opt_acl, Opt_noacl, Opt_locallease,
Opt_sign, Opt_seal, Opt_noac,
Opt_fsc, Opt_mfsymlinks,
- Opt_multiuser, Opt_sloppy,
+ Opt_multiuser, Opt_sloppy, Opt_nosharesock,
/* Mount options which take numeric value */
Opt_backupuid, Opt_backupgid, Opt_uid,
@@ -165,6 +165,7 @@
{ Opt_mfsymlinks, "mfsymlinks" },
{ Opt_multiuser, "multiuser" },
{ Opt_sloppy, "sloppy" },
+ { Opt_nosharesock, "nosharesock" },
{ Opt_backupuid, "backupuid=%s" },
{ Opt_backupgid, "backupgid=%s" },
@@ -1455,6 +1456,9 @@
case Opt_sloppy:
sloppy = true;
break;
+ case Opt_nosharesock:
+ vol->nosharesock = true;
+ break;
/* Numeric Values */
case Opt_backupuid:
@@ -2027,6 +2031,9 @@
{
struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
+ if (vol->nosharesock)
+ return 0;
+
if ((server->vals != vol->vals) || (server->ops != vol->ops))
return 0;