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authorOlga Kornievskaia <kolga@netapp.com>2016-08-03 20:19:48 -0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-08-05 11:29:59 -0400
commit9130b8dbc6ac20f2dc5846e1647f5b60eafab6e3 (patch)
tree09e1924eeee43533a8618d10a2b4988ab9aa9ee9
parentad3331acb1464024d20a184d3358f3cecc373b54 (diff)
SUNRPC: allow for upcalls for same uid but different gss service
It's possible to have simultaneous upcalls for the same UIDs but different GSS service. In that case, we need to allow for the upcall to gssd to proceed so that not the same context is used by two different GSS services. Some servers lock the use of context to the GSS service. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Cc: stable@vger.kernel.org # v3.9+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 23c8e7c39656..976c7812bbd5 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -340,12 +340,14 @@ gss_release_msg(struct gss_upcall_msg *gss_msg)
}
static struct gss_upcall_msg *
-__gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid)
+__gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth)
{
struct gss_upcall_msg *pos;
list_for_each_entry(pos, &pipe->in_downcall, list) {
if (!uid_eq(pos->uid, uid))
continue;
+ if (auth && pos->auth->service != auth->service)
+ continue;
atomic_inc(&pos->count);
dprintk("RPC: %s found msg %p\n", __func__, pos);
return pos;
@@ -365,7 +367,7 @@ gss_add_msg(struct gss_upcall_msg *gss_msg)
struct gss_upcall_msg *old;
spin_lock(&pipe->lock);
- old = __gss_find_upcall(pipe, gss_msg->uid);
+ old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth);
if (old == NULL) {
atomic_inc(&gss_msg->count);
list_add(&gss_msg->list, &pipe->in_downcall);
@@ -714,7 +716,7 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
err = -ENOENT;
/* Find a matching upcall */
spin_lock(&pipe->lock);
- gss_msg = __gss_find_upcall(pipe, uid);
+ gss_msg = __gss_find_upcall(pipe, uid, NULL);
if (gss_msg == NULL) {
spin_unlock(&pipe->lock);
goto err_put_ctx;