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lockd: Register callbacks on the inetaddr_chain and inet6addr_chain

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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>
This commit is contained in:
Scott Mayhew 2015-12-11 16:46:00 -05:00 committed by J. Bruce Fields
parent 366849966f
commit 0751ddf77b
1 changed files with 72 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

74
fs/lockd/svc.c
View file

@ -25,13 +25,17 @@
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/kthread.h> #include <linux/kthread.h>
#include <linux/freezer.h> #include <linux/freezer.h>
#include <linux/inetdevice.h>
#include <linux/sunrpc/types.h> #include <linux/sunrpc/types.h>
#include <linux/sunrpc/stats.h> #include <linux/sunrpc/stats.h>
#include <linux/sunrpc/clnt.h> #include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h> #include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/svc_xprt.h>
#include <net/ip.h> #include <net/ip.h>
#include <net/addrconf.h>
#include <net/ipv6.h>
#include <linux/lockd/lockd.h> #include <linux/lockd/lockd.h>
#include <linux/nfs.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) static int lockd_start_svc(struct svc_serv *serv)
{ {
int error; int error;
@ -315,7 +381,7 @@ static int lockd_start_svc(struct svc_serv *serv)
return 0; return 0;
out_task: out_task:
svc_exit_thread(nlmsvc_rqst); lockd_svc_exit_thread();
nlmsvc_task = NULL; nlmsvc_task = NULL;
out_rqst: out_rqst:
nlmsvc_rqst = NULL; nlmsvc_rqst = NULL;
@ -360,6 +426,10 @@ static struct svc_serv *lockd_create_svc(void)
printk(KERN_WARNING "lockd_up: create service failed\n"); printk(KERN_WARNING "lockd_up: create service failed\n");
return ERR_PTR(-ENOMEM); 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"); dprintk("lockd_up: service created\n");
return serv; return serv;
} }
@ -428,7 +498,7 @@ lockd_down(struct net *net)
} }
kthread_stop(nlmsvc_task); kthread_stop(nlmsvc_task);
dprintk("lockd_down: service stopped\n"); dprintk("lockd_down: service stopped\n");
svc_exit_thread(nlmsvc_rqst); lockd_svc_exit_thread();
dprintk("lockd_down: service destroyed\n"); dprintk("lockd_down: service destroyed\n");
nlmsvc_task = NULL; nlmsvc_task = NULL;
nlmsvc_rqst = NULL; nlmsvc_rqst = NULL;