nilfs2: fix missing zero-fill initialization of btree node cache

[safe/jmp/linux-2.6] / fs / afs / vnode.c

diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index bea8bd9..2f05c4f 100644 (file)
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/fs.h>
+#include <linux/sched.h>
 #include "internal.h"
 
 #if 0
@@ -560,7 +561,7 @@ no_server:
 /*
  * create a hard link
  */
-extern int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
                          struct key *key, const char *name)
 {
        struct afs_server *server;
@@ -869,3 +870,157 @@ no_server:
        spin_unlock(&vnode->lock);
        return PTR_ERR(server);
 }
+
+/*
+ * get the status of a volume
+ */
+int afs_vnode_get_volume_status(struct afs_vnode *vnode, struct key *key,
+                               struct afs_volume_status *vs)
+{
+       struct afs_server *server;
+       int ret;
+
+       _enter("%s{%x:%u.%u},%x,",
+              vnode->volume->vlocation->vldb.name,
+              vnode->fid.vid,
+              vnode->fid.vnode,
+              vnode->fid.unique,
+              key_serial(key));
+
+       do {
+               /* pick a server to query */
+               server = afs_volume_pick_fileserver(vnode);
+               if (IS_ERR(server))
+                       goto no_server;
+
+               _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+               ret = afs_fs_get_volume_status(server, key, vnode, vs, &afs_sync_call);
+
+       } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+       /* adjust the flags */
+       if (ret == 0)
+               afs_put_server(server);
+
+       _leave(" = %d", ret);
+       return ret;
+
+no_server:
+       return PTR_ERR(server);
+}
+
+/*
+ * get a lock on a file
+ */
+int afs_vnode_set_lock(struct afs_vnode *vnode, struct key *key,
+                      afs_lock_type_t type)
+{
+       struct afs_server *server;
+       int ret;
+
+       _enter("%s{%x:%u.%u},%x,%u",
+              vnode->volume->vlocation->vldb.name,
+              vnode->fid.vid,
+              vnode->fid.vnode,
+              vnode->fid.unique,
+              key_serial(key), type);
+
+       do {
+               /* pick a server to query */
+               server = afs_volume_pick_fileserver(vnode);
+               if (IS_ERR(server))
+                       goto no_server;
+
+               _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+               ret = afs_fs_set_lock(server, key, vnode, type, &afs_sync_call);
+
+       } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+       /* adjust the flags */
+       if (ret == 0)
+               afs_put_server(server);
+
+       _leave(" = %d", ret);
+       return ret;
+
+no_server:
+       return PTR_ERR(server);
+}
+
+/*
+ * extend a lock on a file
+ */
+int afs_vnode_extend_lock(struct afs_vnode *vnode, struct key *key)
+{
+       struct afs_server *server;
+       int ret;
+
+       _enter("%s{%x:%u.%u},%x",
+              vnode->volume->vlocation->vldb.name,
+              vnode->fid.vid,
+              vnode->fid.vnode,
+              vnode->fid.unique,
+              key_serial(key));
+
+       do {
+               /* pick a server to query */
+               server = afs_volume_pick_fileserver(vnode);
+               if (IS_ERR(server))
+                       goto no_server;
+
+               _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+               ret = afs_fs_extend_lock(server, key, vnode, &afs_sync_call);
+
+       } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+       /* adjust the flags */
+       if (ret == 0)
+               afs_put_server(server);
+
+       _leave(" = %d", ret);
+       return ret;
+
+no_server:
+       return PTR_ERR(server);
+}
+
+/*
+ * release a lock on a file
+ */
+int afs_vnode_release_lock(struct afs_vnode *vnode, struct key *key)
+{
+       struct afs_server *server;
+       int ret;
+
+       _enter("%s{%x:%u.%u},%x",
+              vnode->volume->vlocation->vldb.name,
+              vnode->fid.vid,
+              vnode->fid.vnode,
+              vnode->fid.unique,
+              key_serial(key));
+
+       do {
+               /* pick a server to query */
+               server = afs_volume_pick_fileserver(vnode);
+               if (IS_ERR(server))
+                       goto no_server;
+
+               _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+               ret = afs_fs_release_lock(server, key, vnode, &afs_sync_call);
+
+       } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+       /* adjust the flags */
+       if (ret == 0)
+               afs_put_server(server);
+
+       _leave(" = %d", ret);
+       return ret;
+
+no_server:
+       return PTR_ERR(server);
+}