AFS: Fix afs_prepare_write()

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

diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index bea8bd9e7b2a2eedfc4fdade3767b86d8e6a7dfb..c36c98ce2c3ce75c7c6a214194f521a79c6a0bbe 100644 (file)
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -869,3 +869,55 @@ 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));
+
+       /* this op will fetch the status */
+       spin_lock(&vnode->lock);
+       vnode->update_cnt++;
+       spin_unlock(&vnode->lock);
+
+       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_vnode_finalise_status_update(vnode, server);
+               afs_put_server(server);
+       } else {
+               afs_vnode_status_update_failed(vnode, ret);
+       }
+
+       _leave(" = %d", ret);
+       return ret;
+
+no_server:
+       spin_lock(&vnode->lock);
+       vnode->update_cnt--;
+       ASSERTCMP(vnode->update_cnt, >=, 0);
+       spin_unlock(&vnode->lock);
+       return PTR_ERR(server);
+}