[PATCH 3/4] SUNRPC: service destruction in network namespace context
From: Stanislav Kinsbursky <hidden>
Date: 2012-01-25 13:47:35
Also in:
linux-nfs, lkml
Subsystem:
kernel nfsd, sunrpc, and lockd servers, networking [general], nfs, sunrpc, and lockd clients, the rest · Maintainers:
Chuck Lever, Jeff Layton, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Trond Myklebust, Anna Schumaker, Linus Torvalds
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 <redacted> --- include/linux/sunrpc/svcsock.h | 2 +- net/sunrpc/svc.c | 9 +++++++-- net/sunrpc/svc_xprt.c | 27 +++++++++++++++++---------- 3 files changed, 25 insertions(+), 13 deletions(-)
diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h
index c84e974..cb4ac69 100644
--- a/include/linux/sunrpc/svcsock.h
+++ b/include/linux/sunrpc/svcsock.h@@ -34,7 +34,7 @@ struct svc_sock { /* * Function prototypes. */ -void svc_close_all(struct svc_serv *); +void svc_close_net(struct svc_serv *, struct net *); int svc_recv(struct svc_rqst *, long); int svc_send(struct svc_rqst *); void svc_drop(struct svc_rqst *);
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index a8b49a0..279bbd8 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 +541,13 @@ 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); + + 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 493e70b..4bda09d 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); } /*