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LockD: manage used host count per networks namespace 

This patch introduces moves nrhosts in per-net data.
It also adds kernel warning to nlm_shutdown_hosts_net() about remaining hosts
in specified network namespace context.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky 2012-07-25 16:56:19 +04:00 committed by J. Bruce Fields
parent 3cf7fb07e0
commit caa4e76b6f
2 changed files with 19 additions and 0 deletions
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18
fs/lockd/host.c
View File

@ -173,6 +173,7 @@ static struct nlm_host *nlm_alloc_host(struct nlm_lookup_host_info *ni,
static void nlm_destroy_host_locked(struct nlm_host *host)
{
struct rpc_clnt *clnt;
struct lockd_net *ln = net_generic(host->net, lockd_net_id);
dprintk("lockd: destroy host %s\n", host->h_name);
@ -189,6 +190,7 @@ static void nlm_destroy_host_locked(struct nlm_host *host)
rpc_shutdown_client(clnt);
kfree(host);
ln->nrhosts--;
nrhosts--;
}
@ -229,6 +231,7 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
struct hlist_node *pos;
struct nlm_host *host;
struct nsm_handle *nsm = NULL;
struct lockd_net *ln = net_generic(net, lockd_net_id);
dprintk("lockd: %s(host='%s', vers=%u, proto=%s)\n", __func__,
(hostname ? hostname : "<none>"), version,
@ -263,6 +266,7 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
goto out;
hlist_add_head(&host->h_hash, chain);
ln->nrhosts++;
nrhosts++;
dprintk("lockd: %s created host %s (%s)\n", __func__,
@ -384,6 +388,7 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp,
memcpy(nlm_srcaddr(host), src_sap, src_len);
host->h_srcaddrlen = src_len;
hlist_add_head(&host->h_hash, chain);
ln->nrhosts++;
nrhosts++;
dprintk("lockd: %s created host %s (%s)\n",
@ -592,6 +597,19 @@ nlm_shutdown_hosts_net(struct net *net)
/* Then, perform a garbage collection pass */
nlm_gc_hosts(net);
mutex_unlock(&nlm_host_mutex);
/* complain if any hosts are left */
if (net) {
struct lockd_net *ln = net_generic(net, lockd_net_id);
printk(KERN_WARNING "lockd: couldn't shutdown host module for net %p!\n", net);
dprintk("lockd: %lu hosts left in net %p:\n", ln->nrhosts, net);
for_each_host(host, pos, chain, nlm_server_hosts) {
dprintk(" %s (cnt %d use %d exp %ld net %p)\n",
host->h_name, atomic_read(&host->h_count),
host->h_inuse, host->h_expires, host->net);
}
}
}
/*

1
fs/lockd/netns.h
View File

@ -6,6 +6,7 @@
struct lockd_net {
unsigned int nlmsvc_users;
unsigned long next_gc;
unsigned long nrhosts;
};
extern int lockd_net_id;