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authorStanislav Kinsbursky <skinsbursky@parallels.com>2012-01-31 14:09:17 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-02-15 00:19:45 -0500
commit7b147f1ff267d12e0d189ca3d4156ed5a76b8d99 (patch)
tree651496e6e08521de934b2ad0953e2b81d3f5da2f /net/sunrpc
parent3a22bf506c9df47e93e8dc8a68d86cd8ae384d98 (diff)
SUNRPC: service destruction in network namespace context
v2: Added comment to BUG_ON's in svc_destroy() to make code looks clearer. This patch introduces network namespace filter for service destruction function. Nothing special here - just do exactly the same operations, but only for tranports in passed networks namespace context. BTW, BUG_ON() checks for empty service transports lists were returned into svc_destroy() function. This is because of swithing generic svc_close_all() to networks namespace dependable svc_close_net(). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/svc.c13
-rw-r--r--net/sunrpc/svc_xprt.c27
2 files changed, 28 insertions, 12 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index a8b49a044619..6cc0ea3d26f1 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -517,6 +517,8 @@ EXPORT_SYMBOL_GPL(svc_create_pooled);
void
svc_destroy(struct svc_serv *serv)
{
+ struct net *net = current->nsproxy->net_ns;
+
dprintk("svc: svc_destroy(%s, %d)\n",
serv->sv_program->pg_name,
serv->sv_nrthreads);
@@ -539,10 +541,17 @@ svc_destroy(struct svc_serv *serv)
* caller is using--nfsd_mutex in the case of nfsd). So it's
* safe to traverse those lists and shut everything down:
*/
- svc_close_all(serv);
+ svc_close_net(serv, net);
+
+ /*
+ * The last user is gone and thus all sockets have to be destroyed to
+ * the point. Check this.
+ */
+ BUG_ON(!list_empty(&serv->sv_permsocks));
+ BUG_ON(!list_empty(&serv->sv_tempsocks));
if (serv->sv_shutdown)
- serv->sv_shutdown(serv, current->nsproxy->net_ns);
+ serv->sv_shutdown(serv, net);
cache_clean_deferred(serv);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 493e70b72b71..4bda09d7e1a4 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -922,17 +922,19 @@ void svc_close_xprt(struct svc_xprt *xprt)
}
EXPORT_SYMBOL_GPL(svc_close_xprt);
-static void svc_close_list(struct list_head *xprt_list)
+static void svc_close_list(struct list_head *xprt_list, struct net *net)
{
struct svc_xprt *xprt;
list_for_each_entry(xprt, xprt_list, xpt_list) {
+ if (xprt->xpt_net != net)
+ continue;
set_bit(XPT_CLOSE, &xprt->xpt_flags);
set_bit(XPT_BUSY, &xprt->xpt_flags);
}
}
-static void svc_clear_pools(struct svc_serv *serv)
+static void svc_clear_pools(struct svc_serv *serv, struct net *net)
{
struct svc_pool *pool;
struct svc_xprt *xprt;
@@ -944,36 +946,41 @@ static void svc_clear_pools(struct svc_serv *serv)
spin_lock_bh(&pool->sp_lock);
list_for_each_entry_safe(xprt, tmp, &pool->sp_sockets, xpt_ready) {
+ if (xprt->xpt_net != net)
+ continue;
list_del_init(&xprt->xpt_ready);
}
spin_unlock_bh(&pool->sp_lock);
}
}
-static void svc_clear_list(struct list_head *xprt_list)
+static void svc_clear_list(struct list_head *xprt_list, struct net *net)
{
struct svc_xprt *xprt;
struct svc_xprt *tmp;
list_for_each_entry_safe(xprt, tmp, xprt_list, xpt_list) {
+ if (xprt->xpt_net != net)
+ continue;
svc_delete_xprt(xprt);
}
- BUG_ON(!list_empty(xprt_list));
+ list_for_each_entry(xprt, xprt_list, xpt_list)
+ BUG_ON(xprt->xpt_net == net);
}
-void svc_close_all(struct svc_serv *serv)
+void svc_close_net(struct svc_serv *serv, struct net *net)
{
- svc_close_list(&serv->sv_tempsocks);
- svc_close_list(&serv->sv_permsocks);
+ svc_close_list(&serv->sv_tempsocks, net);
+ svc_close_list(&serv->sv_permsocks, net);
- svc_clear_pools(serv);
+ svc_clear_pools(serv, net);
/*
* At this point the sp_sockets lists will stay empty, since
* svc_enqueue will not add new entries without taking the
* sp_lock and checking XPT_BUSY.
*/
- svc_clear_list(&serv->sv_tempsocks);
- svc_clear_list(&serv->sv_permsocks);
+ svc_clear_list(&serv->sv_tempsocks, net);
+ svc_clear_list(&serv->sv_permsocks, net);
}
/*