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-rw-r--r--net/sunrpc/svc.c10
-rw-r--r--net/sunrpc/svc_xprt.c48
2 files changed, 38 insertions, 20 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 7ddfb04ca2a6..d4ad50ece9bc 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -530,7 +530,15 @@ svc_destroy(struct svc_serv *serv)
printk("svc_destroy: no threads for serv=%p!\n", serv);
del_timer_sync(&serv->sv_temptimer);
-
+ /*
+ * The set of xprts (contained in the sv_tempsocks and
+ * sv_permsocks lists) is now constant, since it is modified
+ * only by accepting new sockets (done by service threads in
+ * svc_recv) or aging old ones (done by sv_temptimer), or
+ * configuration changes (excluded by whatever locking the
+ * 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);
if (serv->sv_shutdown)
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index dcdc8df1fa2a..9ed2cd069f45 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -893,14 +893,7 @@ void svc_delete_xprt(struct svc_xprt *xprt)
spin_lock_bh(&serv->sv_lock);
if (!test_and_set_bit(XPT_DETACHED, &xprt->xpt_flags))
list_del_init(&xprt->xpt_list);
- /*
- * The only time we're called while xpt_ready is still on a list
- * is while the list itself is about to be destroyed (in
- * svc_destroy). BUT svc_xprt_enqueue could still be attempting
- * to add new entries to the sp_sockets list, so we can't leave
- * a freed xprt on it.
- */
- list_del_init(&xprt->xpt_ready);
+ BUG_ON(!list_empty(&xprt->xpt_ready));
if (test_bit(XPT_TEMP, &xprt->xpt_flags))
serv->sv_tmpcnt--;
spin_unlock_bh(&serv->sv_lock);
@@ -931,28 +924,45 @@ EXPORT_SYMBOL_GPL(svc_close_xprt);
static void svc_close_list(struct list_head *xprt_list)
{
struct svc_xprt *xprt;
- struct svc_xprt *tmp;
- /*
- * The server is shutting down, and no more threads are running.
- * svc_xprt_enqueue() might still be running, but at worst it
- * will re-add the xprt to sp_sockets, which will soon get
- * freed. So we don't bother with any more locking, and don't
- * leave the close to the (nonexistent) server threads:
- */
- list_for_each_entry_safe(xprt, tmp, xprt_list, xpt_list) {
+ list_for_each_entry(xprt, xprt_list, xpt_list) {
set_bit(XPT_CLOSE, &xprt->xpt_flags);
- svc_delete_xprt(xprt);
+ set_bit(XPT_BUSY, &xprt->xpt_flags);
}
}
void svc_close_all(struct svc_serv *serv)
{
+ struct svc_pool *pool;
+ struct svc_xprt *xprt;
+ struct svc_xprt *tmp;
+ int i;
+
svc_close_list(&serv->sv_tempsocks);
svc_close_list(&serv->sv_permsocks);
+
+ for (i = 0; i < serv->sv_nrpools; i++) {
+ pool = &serv->sv_pools[i];
+
+ spin_lock_bh(&pool->sp_lock);
+ while (!list_empty(&pool->sp_sockets)) {
+ xprt = list_first_entry(&pool->sp_sockets, struct svc_xprt, xpt_ready);
+ list_del_init(&xprt->xpt_ready);
+ }
+ spin_unlock_bh(&pool->sp_lock);
+ }
+ /*
+ * 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.
+ */
+ list_for_each_entry_safe(xprt, tmp, &serv->sv_tempsocks, xpt_list)
+ svc_delete_xprt(xprt);
+ list_for_each_entry_safe(xprt, tmp, &serv->sv_permsocks, xpt_list)
+ svc_delete_xprt(xprt);
+
BUG_ON(!list_empty(&serv->sv_permsocks));
BUG_ON(!list_empty(&serv->sv_tempsocks));
-
}
/*