Lockd: pass network namespace to creation and destruction routines

v2: dereference of most probably already released nlm_host removed in
nlmclnt_done() and reclaimer().

These routines are called from locks reclaimer() kernel thread. This thread
works in "init_net" network context and currently relays on persence on lockd
thread and it's per-net resources. Thus lockd_up() and lockd_down() can't relay
on current network context. So let's pass corrent one into them.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index ba1dc2eebd1e..ca0a08001449 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -56,7 +56,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
         u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
         int status;
 
-        status = lockd_up();
+        status = lockd_up(nlm_init->net);
         if (status < 0)
                 return ERR_PTR(status);
 
@@ -65,7 +65,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
                                    nlm_init->hostname, nlm_init->noresvport,
                                    nlm_init->net);
         if (host == NULL) {
-                lockd_down();
+                lockd_down(nlm_init->net);
                 return ERR_PTR(-ENOLCK);
         }
 
@@ -80,8 +80,10 @@ EXPORT_SYMBOL_GPL(nlmclnt_init);
  */
 void nlmclnt_done(struct nlm_host *host)
 {
+        struct net *net = host->net;
+
         nlmclnt_release_host(host);
-        lockd_down();
+        lockd_down(net);
 }
 EXPORT_SYMBOL_GPL(nlmclnt_done);
 
@@ -220,11 +222,12 @@ reclaimer(void *ptr)
         struct nlm_wait   *block;
         struct file_lock *fl, *next;
         u32 nsmstate;
+        struct net *net = host->net;
 
         allow_signal(SIGKILL);
 
         down_write(&host->h_rwsem);
-        lockd_up();     /* note: this cannot fail as lockd is already running */
+        lockd_up(net);  /* note: this cannot fail as lockd is already running */
 
         dprintk("lockd: reclaiming locks for host %s\n", host->h_name);
 
@@ -275,6 +278,6 @@ restart:
 
         /* Release host handle after use */
         nlmclnt_release_host(host);
-        lockd_down();
+        lockd_down(net);
         return 0;
 }