[packages/kernel/LINUX_3_7] one more autofs/nfs related fix, release 3.
pluto
pluto at pld-linux.org
Wed Mar 6 20:02:07 CET 2013
commit 06d3ba47ad300110d7ef55b7dd2ba5b615b469a4
Author: Paweł Sikora <pawel.sikora at agmk.net>
Date: Wed Mar 6 20:01:01 2013 +0100
one more autofs/nfs related fix, release 3.
kernel-small_fixes.patch | 149 +++++++++++++++++++++++++++++++++++++++++++++++
kernel.spec | 2 +-
2 files changed, 150 insertions(+), 1 deletion(-)
---
diff --git a/kernel.spec b/kernel.spec
index 5813ba1..1f9d665 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -66,7 +66,7 @@
%define have_pcmcia 0
%endif
-%define rel 2
+%define rel 3
%define basever 3.7
%define postver .10
diff --git a/kernel-small_fixes.patch b/kernel-small_fixes.patch
index 95b9948..9a09e76 100644
--- a/kernel-small_fixes.patch
+++ b/kernel-small_fixes.patch
@@ -795,3 +795,152 @@ Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
mod_timer(&serv->sv_temptimer, jiffies + svc_conn_age_period * HZ);
}
+From cc630d9f476445927fca599f81182c7f06f79058 Mon Sep 17 00:00:00 2001
+From: "J. Bruce Fields" <bfields at redhat.com>
+Date: Sun, 10 Feb 2013 16:08:11 -0500
+Subject: svcrpc: fix rpc server shutdown races
+
+From: "J. Bruce Fields" <bfields at redhat.com>
+
+commit cc630d9f476445927fca599f81182c7f06f79058 upstream.
+
+Rewrite server shutdown to remove the assumption that there are no
+longer any threads running (no longer true, for example, when shutting
+down the service in one network namespace while it's still running in
+others).
+
+Do that by doing what we'd do in normal circumstances: just CLOSE each
+socket, then enqueue it.
+
+Since there may not be threads to handle the resulting queued xprts,
+also run a simplified version of the svc_recv() loop run by a server to
+clean up any closed xprts afterwards.
+
+Tested-by: Jason Tibbitts <tibbs at math.uh.edu>
+Tested-by: Paweł Sikora <pawel.sikora at agmk.net>
+Acked-by: Stanislav Kinsbursky <skinsbursky at parallels.com>
+Signed-off-by: J. Bruce Fields <bfields at redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
+
+---
+ net/sunrpc/svc.c | 9 -------
+ net/sunrpc/svc_xprt.c | 57 ++++++++++++++++++++++++++++----------------------
+ 2 files changed, 32 insertions(+), 34 deletions(-)
+
+--- 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)
+--- a/net/sunrpc/svc_xprt.c
++++ b/net/sunrpc/svc_xprt.c
+@@ -948,21 +948,24 @@ void svc_close_xprt(struct svc_xprt *xpr
+ }
+ 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;
+@@ -977,42 +980,46 @@ static void svc_clear_pools(struct svc_s
+ 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;
++
++ while (svc_close_list(serv, &serv->sv_permsocks, net) +
++ svc_close_list(serv, &serv->sv_tempsocks, net)) {
+
+- 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);
++ svc_clean_up_xprts(serv, net);
++ msleep(delay++);
++ }
+ }
+
+ /*
================================================================
---- gitweb:
http://git.pld-linux.org/gitweb.cgi/packages/kernel.git/commitdiff/06d3ba47ad300110d7ef55b7dd2ba5b615b469a4
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