SUNRPC: ip map cache per network namespace cleanup

This patch converts ip_map_cache per network namespace implemenetation to the
same view, as other caches done in the series.
Besides generalization, code becomes shorter with this patch.

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

1 files changed, 30 insertions, 41 deletions

diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index a6eef38fb35..bcd574f2ac5 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -211,7 +211,7 @@ static int ip_map_parse(struct cache_detail *cd,
         len = qword_get(&mesg, buf, mlen);
         if (len <= 0) return -EINVAL;
 
-        if (rpc_pton(&init_net, buf, len, &address.sa, sizeof(address)) == 0)
+        if (rpc_pton(cd->net, buf, len, &address.sa, sizeof(address)) == 0)
                 return -EINVAL;
         switch (address.sa.sa_family) {
         case AF_INET:
@@ -876,56 +876,45 @@ struct auth_ops svcauth_unix = {
         .set_client     = svcauth_unix_set_client,
 };
 
+static struct cache_detail ip_map_cache_template = {
+        .owner          = THIS_MODULE,
+        .hash_size      = IP_HASHMAX,
+        .name           = "auth.unix.ip",
+        .cache_put      = ip_map_put,
+        .cache_upcall   = ip_map_upcall,
+        .cache_parse    = ip_map_parse,
+        .cache_show     = ip_map_show,
+        .match          = ip_map_match,
+        .init           = ip_map_init,
+        .update         = update,
+        .alloc          = ip_map_alloc,
+};
+
 int ip_map_cache_create(struct net *net)
 {
-        int err = -ENOMEM;
-        struct cache_detail *cd;
-        struct cache_head **tbl;
         struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+        struct cache_detail *cd;
+        int err;
 
-        cd = kzalloc(sizeof(struct cache_detail), GFP_KERNEL);
-        if (cd == NULL)
-                goto err_cd;
-
-        tbl = kzalloc(IP_HASHMAX * sizeof(struct cache_head *), GFP_KERNEL);
-        if (tbl == NULL)
-                goto err_tbl;
-
-        cd->owner = THIS_MODULE,
-        cd->hash_size = IP_HASHMAX,
-        cd->hash_table = tbl,
-        cd->name = "auth.unix.ip",
-        cd->cache_put = ip_map_put,
-        cd->cache_upcall = ip_map_upcall,
-        cd->cache_parse = ip_map_parse,
-        cd->cache_show = ip_map_show,
-        cd->match = ip_map_match,
-        cd->init = ip_map_init,
-        cd->update = update,
-        cd->alloc = ip_map_alloc,
-
+        cd = cache_create_net(&ip_map_cache_template, net);
+        if (IS_ERR(cd))
+                return PTR_ERR(cd);
         err = cache_register_net(cd, net);
-        if (err)
-                goto err_reg;
-
+        if (err) {
+                cache_destroy_net(cd, net);
+                return err;
+        }
         sn->ip_map_cache = cd;
         return 0;
-
-err_reg:
-        kfree(tbl);
-err_tbl:
-        kfree(cd);
-err_cd:
-        return err;
 }
 
 void ip_map_cache_destroy(struct net *net)
 {
-        struct sunrpc_net *sn;
+        struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+        struct cache_detail *cd = sn->ip_map_cache;
 
-        sn = net_generic(net, sunrpc_net_id);
-        cache_purge(sn->ip_map_cache);
-        cache_unregister_net(sn->ip_map_cache, net);
-        kfree(sn->ip_map_cache->hash_table);
-        kfree(sn->ip_map_cache);
+        sn->ip_map_cache = NULL;
+        cache_purge(cd);
+        cache_unregister_net(cd, net);
+        cache_destroy_net(cd, net);
 }