nfsd: make NFSv4 grace time per net

Grace time is a part of NFSv4 state engine, which is constructed per network
namespace.

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

4 files changed, 7 insertions, 9 deletions

diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 0c20be82cb01..2c4b2e2896dd 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -89,6 +89,7 @@ struct nfsd_net {
         bool in_grace;
 
         time_t nfsd4_lease;
+        time_t nfsd4_grace;
 };
 
 extern int nfsd_net_id;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 932b2ca6f203..3db7617e6d39 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -50,9 +50,6 @@
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
-/* Globals */
-time_t nfsd4_grace = 90;
-
 #define all_ones {{~0,~0},~0}
 static const stateid_t one_stateid = {
         .si_generation = ~0,
@@ -3183,7 +3180,7 @@ nfsd4_end_grace(struct nfsd_net *nn)
          * to see the (possibly new, possibly shorter) lease time, we
          * can safely set the next grace time to the current lease time:
          */
-        nfsd4_grace = nn->nfsd4_lease;
+        nn->nfsd4_grace = nn->nfsd4_lease;
 }
 
 static time_t
@@ -4884,8 +4881,8 @@ nfs4_state_start_net(struct net *net)
         locks_start_grace(net, &nn->nfsd4_manager);
         nn->grace_ended = false;
         printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
-               nfsd4_grace, net);
-        queue_delayed_work(laundry_wq, &nn->laundromat_work, nfsd4_grace * HZ);
+               nn->nfsd4_grace, net);
+        queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
         return 0;
 }
 
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 09d909a42ece..d902f83681e7 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -925,7 +925,8 @@ static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
  */
 static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
 {
-        return nfsd4_write_time(file, buf, size, &nfsd4_grace);
+        struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+        return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace);
 }
 
 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
@@ -1070,6 +1071,7 @@ static __net_init int nfsd_init_net(struct net *net)
         if (retval)
                 goto out_idmap_error;
         nn->nfsd4_lease = 90;   /* default lease time */
+        nn->nfsd4_grace = 90;
         return 0;
 
 out_idmap_error:
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index a8f7325a9124..5eea0f5021fd 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -276,8 +276,6 @@ extern struct timeval	nfssvc_boot;
 
 #ifdef CONFIG_NFSD_V4
 
-extern time_t nfsd4_grace;
-
 /* before processing a COMPOUND operation, we have to check that there
  * is enough space in the buffer for XDR encode to succeed.  otherwise,
  * we might process an operation with side effects, and be unable to