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>
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366849966f
Коммит
0751ddf77b
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@ -25,13 +25,17 @@
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/inetdevice.h>
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#include <linux/sunrpc/types.h>
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#include <linux/sunrpc/stats.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/sunrpc/svcsock.h>
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#include <linux/sunrpc/svc_xprt.h>
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#include <net/ip.h>
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#include <net/addrconf.h>
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#include <net/ipv6.h>
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#include <linux/lockd/lockd.h>
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#include <linux/nfs.h>
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@ -279,6 +283,68 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
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}
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}
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static int lockd_inetaddr_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
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struct sockaddr_in sin;
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if (event != NETDEV_DOWN)
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goto out;
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if (nlmsvc_rqst) {
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dprintk("lockd_inetaddr_event: removed %pI4\n",
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&ifa->ifa_local);
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = ifa->ifa_local;
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svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
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(struct sockaddr *)&sin);
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}
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out:
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return NOTIFY_DONE;
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}
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static struct notifier_block lockd_inetaddr_notifier = {
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.notifier_call = lockd_inetaddr_event,
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};
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#if IS_ENABLED(CONFIG_IPV6)
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static int lockd_inet6addr_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
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struct sockaddr_in6 sin6;
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if (event != NETDEV_DOWN)
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goto out;
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if (nlmsvc_rqst) {
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dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr);
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sin6.sin6_family = AF_INET6;
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sin6.sin6_addr = ifa->addr;
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svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
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(struct sockaddr *)&sin6);
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}
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out:
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return NOTIFY_DONE;
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}
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static struct notifier_block lockd_inet6addr_notifier = {
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.notifier_call = lockd_inet6addr_event,
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};
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#endif
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static void lockd_svc_exit_thread(void)
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{
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unregister_inetaddr_notifier(&lockd_inetaddr_notifier);
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#if IS_ENABLED(CONFIG_IPV6)
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unregister_inet6addr_notifier(&lockd_inet6addr_notifier);
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#endif
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svc_exit_thread(nlmsvc_rqst);
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}
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static int lockd_start_svc(struct svc_serv *serv)
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{
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int error;
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@ -315,7 +381,7 @@ static int lockd_start_svc(struct svc_serv *serv)
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return 0;
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out_task:
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svc_exit_thread(nlmsvc_rqst);
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lockd_svc_exit_thread();
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nlmsvc_task = NULL;
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out_rqst:
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nlmsvc_rqst = NULL;
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@ -360,6 +426,10 @@ static struct svc_serv *lockd_create_svc(void)
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printk(KERN_WARNING "lockd_up: create service failed\n");
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return ERR_PTR(-ENOMEM);
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}
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register_inetaddr_notifier(&lockd_inetaddr_notifier);
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#if IS_ENABLED(CONFIG_IPV6)
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register_inet6addr_notifier(&lockd_inet6addr_notifier);
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#endif
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dprintk("lockd_up: service created\n");
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return serv;
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}
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@ -428,7 +498,7 @@ lockd_down(struct net *net)
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}
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kthread_stop(nlmsvc_task);
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dprintk("lockd_down: service stopped\n");
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svc_exit_thread(nlmsvc_rqst);
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lockd_svc_exit_thread();
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dprintk("lockd_down: service destroyed\n");
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nlmsvc_task = NULL;
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nlmsvc_rqst = NULL;
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