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authorScott Mayhew <smayhew@redhat.com>2015-12-11 16:46:00 -0500
committerJ. Bruce Fields <bfields@redhat.com>2015-12-23 10:08:16 -0500
commit0751ddf77b6af2efe1041efb81141badd64efb65 (patch)
treeed777a2c5ff8a510ea28d7262912df8aba59281d /fs
parent366849966f20a3d996a2160778861e348cc6a7c6 (diff)
lockd: Register callbacks on the inetaddr_chain and inet6addr_chain
Register callbacks on inetaddr_chain and inet6addr_chain to trigger cleanup of lockd transport sockets when an ip address is deleted. Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/lockd/svc.c74
1 files changed, 72 insertions, 2 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 5f31ebd96c06..44d18ad4d364 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -25,13 +25,17 @@
#include <linux/mutex.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
+#include <linux/inetdevice.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h>
+#include <linux/sunrpc/svc_xprt.h>
#include <net/ip.h>
+#include <net/addrconf.h>
+#include <net/ipv6.h>
#include <linux/lockd/lockd.h>
#include <linux/nfs.h>
@@ -279,6 +283,68 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
}
}
+static int lockd_inetaddr_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
+ struct sockaddr_in sin;
+
+ if (event != NETDEV_DOWN)
+ goto out;
+
+ if (nlmsvc_rqst) {
+ dprintk("lockd_inetaddr_event: removed %pI4\n",
+ &ifa->ifa_local);
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = ifa->ifa_local;
+ svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
+ (struct sockaddr *)&sin);
+ }
+
+out:
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block lockd_inetaddr_notifier = {
+ .notifier_call = lockd_inetaddr_event,
+};
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int lockd_inet6addr_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
+ struct sockaddr_in6 sin6;
+
+ if (event != NETDEV_DOWN)
+ goto out;
+
+ if (nlmsvc_rqst) {
+ dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr);
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr = ifa->addr;
+ svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
+ (struct sockaddr *)&sin6);
+ }
+
+out:
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block lockd_inet6addr_notifier = {
+ .notifier_call = lockd_inet6addr_event,
+};
+#endif
+
+static void lockd_svc_exit_thread(void)
+{
+ unregister_inetaddr_notifier(&lockd_inetaddr_notifier);
+#if IS_ENABLED(CONFIG_IPV6)
+ unregister_inet6addr_notifier(&lockd_inet6addr_notifier);
+#endif
+ svc_exit_thread(nlmsvc_rqst);
+}
+
static int lockd_start_svc(struct svc_serv *serv)
{
int error;
@@ -315,7 +381,7 @@ static int lockd_start_svc(struct svc_serv *serv)
return 0;
out_task:
- svc_exit_thread(nlmsvc_rqst);
+ lockd_svc_exit_thread();
nlmsvc_task = NULL;
out_rqst:
nlmsvc_rqst = NULL;
@@ -360,6 +426,10 @@ static struct svc_serv *lockd_create_svc(void)
printk(KERN_WARNING "lockd_up: create service failed\n");
return ERR_PTR(-ENOMEM);
}
+ register_inetaddr_notifier(&lockd_inetaddr_notifier);
+#if IS_ENABLED(CONFIG_IPV6)
+ register_inet6addr_notifier(&lockd_inet6addr_notifier);
+#endif
dprintk("lockd_up: service created\n");
return serv;
}
@@ -428,7 +498,7 @@ lockd_down(struct net *net)
}
kthread_stop(nlmsvc_task);
dprintk("lockd_down: service stopped\n");
- svc_exit_thread(nlmsvc_rqst);
+ lockd_svc_exit_thread();
dprintk("lockd_down: service destroyed\n");
nlmsvc_task = NULL;
nlmsvc_rqst = NULL;