nfsd: make conf_name_tree per net

This tree holds nfs4_clients info, which are network namespace aware.
So let's make it per network namespace.

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

1 files changed, 16 insertions, 15 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6df427773d01..d40e57b9051a 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -404,9 +404,6 @@ static unsigned int clientstr_hashval(const char *name)
 }
 
 /*
- * conf_id_hashtbl[], and conf_name_tree hold confirmed
- * setclientid_confirmed info.
- *
  * unconf_id_hashtbl[] and unconf_name_tree hold unconfirmed
  * setclientid info.
  *
@@ -419,7 +416,6 @@ static unsigned int clientstr_hashval(const char *name)
  * All of the above fields are protected by the client_mutex.
  */
 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
-static struct rb_root conf_name_tree;
 static struct rb_root unconf_name_tree;
 static struct list_head client_lru;
 static struct list_head close_lru;
@@ -1114,6 +1110,7 @@ destroy_client(struct nfs4_client *clp)
         struct nfs4_openowner *oo;
         struct nfs4_delegation *dp;
         struct list_head reaplist;
+        struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
 
         INIT_LIST_HEAD(&reaplist);
         spin_lock(&recall_lock);
@@ -1136,7 +1133,7 @@ destroy_client(struct nfs4_client *clp)
                 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
         list_del(&clp->cl_idhash);
         if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
-                rb_erase(&clp->cl_namenode, &conf_name_tree);
+                rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
         else
                 rb_erase(&clp->cl_namenode, &unconf_name_tree);
         spin_lock(&client_lock);
@@ -1389,7 +1386,7 @@ move_to_confirmed(struct nfs4_client *clp)
         dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
         list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
         rb_erase(&clp->cl_namenode, &unconf_name_tree);
-        add_clp_to_name_tree(clp, &conf_name_tree);
+        add_clp_to_name_tree(clp, &nn->conf_name_tree);
         set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
         renew_client(clp);
 }
@@ -1433,9 +1430,9 @@ static bool clp_used_exchangeid(struct nfs4_client *clp)
 } 
 
 static struct nfs4_client *
-find_confirmed_client_by_name(struct xdr_netobj *name)
+find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
 {
-        return find_clp_in_name_tree(name, &conf_name_tree);
+        return find_clp_in_name_tree(name, &nn->conf_name_tree);
 }
 
 static struct nfs4_client *
@@ -1635,7 +1632,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
 
         /* Cases below refer to rfc 5661 section 18.35.4: */
         nfs4_lock_state();
-        conf = find_confirmed_client_by_name(&exid->clname);
+        conf = find_confirmed_client_by_name(&exid->clname, nn);
         if (conf) {
                 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
                 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
@@ -1829,7 +1826,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
                         status = nfserr_seq_misordered;
                         goto out_free_conn;
                 }
-                old = find_confirmed_client_by_name(&unconf->cl_name);
+                old = find_confirmed_client_by_name(&unconf->cl_name, nn);
                 if (old)
                         expire_client(old);
                 move_to_confirmed(unconf);
@@ -2227,7 +2224,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
         /* Cases below refer to rfc 3530 section 14.2.33: */
         nfs4_lock_state();
-        conf = find_confirmed_client_by_name(&clname);
+        conf = find_confirmed_client_by_name(&clname, nn);
         if (conf) {
                 /* case 0: */
                 status = nfserr_clid_inuse;
@@ -2309,7 +2306,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
                 nfsd4_probe_callback(conf);
                 expire_client(unconf);
         } else { /* case 3: normal case; new or rebooted client */
-                conf = find_confirmed_client_by_name(&unconf->cl_name);
+                conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
                 if (conf)
                         expire_client(conf);
                 move_to_confirmed(unconf);
@@ -4726,7 +4723,6 @@ nfs4_state_init(void)
         for (i = 0; i < CLIENT_HASH_SIZE; i++) {
                 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
         }
-        conf_name_tree = RB_ROOT;
         unconf_name_tree = RB_ROOT;
         for (i = 0; i < SESSION_HASH_SIZE; i++)
                 INIT_LIST_HEAD(&sessionid_hashtbl[i]);
@@ -4772,12 +4768,17 @@ static int nfs4_state_start_net(struct net *net)
         nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
                         CLIENT_HASH_SIZE, GFP_KERNEL);
         if (!nn->conf_id_hashtbl)
-                return -ENOMEM;
+                goto err;
 
-        for (i = 0; i < CLIENT_HASH_SIZE; i++)
+        for (i = 0; i < CLIENT_HASH_SIZE; i++) {
                 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
+        }
+        nn->conf_name_tree = RB_ROOT;
 
         return 0;
+
+err:
+        return -ENOMEM;
 }
 
 static void