diff options
| -rw-r--r-- | net/sunrpc/svc.c | 9 | ||||
| -rw-r--r-- | net/sunrpc/svc_xprt.c | 57 |
2 files changed, 32 insertions, 34 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index b9ba2a8c1c1..89a588b4478 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -515,15 +515,6 @@ EXPORT_SYMBOL_GPL(svc_create_pooled); void svc_shutdown_net(struct svc_serv *serv, struct net *net) { - /* - * 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_net(serv, net); if (serv->sv_shutdown) diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 11a33c87484..80a6640f329 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -955,21 +955,24 @@ void svc_close_xprt(struct svc_xprt *xprt) } EXPORT_SYMBOL_GPL(svc_close_xprt); -static void svc_close_list(struct svc_serv *serv, struct list_head *xprt_list, struct net *net) +static int svc_close_list(struct svc_serv *serv, struct list_head *xprt_list, struct net *net) { struct svc_xprt *xprt; + int ret = 0; spin_lock(&serv->sv_lock); list_for_each_entry(xprt, xprt_list, xpt_list) { if (xprt->xpt_net != net) continue; + ret++; set_bit(XPT_CLOSE, &xprt->xpt_flags); - set_bit(XPT_BUSY, &xprt->xpt_flags); + svc_xprt_enqueue(xprt); } spin_unlock(&serv->sv_lock); + return ret; } -static void svc_clear_pools(struct svc_serv *serv, struct net *net) +static struct svc_xprt *svc_dequeue_net(struct svc_serv *serv, struct net *net) { struct svc_pool *pool; struct svc_xprt *xprt; @@ -984,42 +987,46 @@ static void svc_clear_pools(struct svc_serv *serv, struct net *net) if (xprt->xpt_net != net) continue; list_del_init(&xprt->xpt_ready); + spin_unlock_bh(&pool->sp_lock); + return xprt; } spin_unlock_bh(&pool->sp_lock); } + return NULL; } -static void svc_clear_list(struct svc_serv *serv, struct list_head *xprt_list, struct net *net) +static void svc_clean_up_xprts(struct svc_serv *serv, struct net *net) { struct svc_xprt *xprt; - struct svc_xprt *tmp; - LIST_HEAD(victims); - - spin_lock(&serv->sv_lock); - list_for_each_entry_safe(xprt, tmp, xprt_list, xpt_list) { - if (xprt->xpt_net != net) - continue; - list_move(&xprt->xpt_list, &victims); - } - spin_unlock(&serv->sv_lock); - list_for_each_entry_safe(xprt, tmp, &victims, xpt_list) + while ((xprt = svc_dequeue_net(serv, net))) { + set_bit(XPT_CLOSE, &xprt->xpt_flags); svc_delete_xprt(xprt); + } } +/* + * Server threads may still be running (especially in the case where the + * service is still running in other network namespaces). + * + * So we shut down sockets the same way we would on a running server, by + * setting XPT_CLOSE, enqueuing, and letting a thread pick it up to do + * the close. In the case there are no such other threads, + * threads running, svc_clean_up_xprts() does a simple version of a + * server's main event loop, and in the case where there are other + * threads, we may need to wait a little while and then check again to + * see if they're done. + */ void svc_close_net(struct svc_serv *serv, struct net *net) { - svc_close_list(serv, &serv->sv_tempsocks, net); - svc_close_list(serv, &serv->sv_permsocks, net); + int delay = 0; - svc_clear_pools(serv, net); - /* - * At this point the sp_sockets lists will stay empty, since - * svc_xprt_enqueue will not add new entries without taking the - * sp_lock and checking XPT_BUSY. - */ - svc_clear_list(serv, &serv->sv_tempsocks, net); - svc_clear_list(serv, &serv->sv_permsocks, net); + while (svc_close_list(serv, &serv->sv_permsocks, net) + + svc_close_list(serv, &serv->sv_tempsocks, net)) { + + svc_clean_up_xprts(serv, net); + msleep(delay++); + } } /* |