NFS: Reduce stack footprint of nfs3_proc_rename() and nfs4_proc_rename()

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 22 insertions, 17 deletions

diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 9d5d02f02515..c252fc983a7e 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -432,7 +432,6 @@ static int
 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
                  struct inode *new_dir, struct qstr *new_name)
 {
-        struct nfs_fattr        old_dir_attr, new_dir_attr;
         struct nfs3_renameargs  arg = {
                 .fromfh         = NFS_FH(old_dir),
                 .fromname       = old_name->name,
@@ -441,23 +440,27 @@ nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
                 .toname         = new_name->name,
                 .tolen          = new_name->len
         };
-        struct nfs3_renameres   res = {
-                .fromattr       = &old_dir_attr,
-                .toattr         = &new_dir_attr
-        };
+        struct nfs3_renameres res;
         struct rpc_message msg = {
                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
                 .rpc_argp       = &arg,
                 .rpc_resp       = &res,
         };
-        int                     status;
+        int status = -ENOMEM;
 
         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
-        nfs_fattr_init(&old_dir_attr);
-        nfs_fattr_init(&new_dir_attr);
+
+        res.fromattr = nfs_alloc_fattr();
+        res.toattr = nfs_alloc_fattr();
+        if (res.fromattr == NULL || res.toattr == NULL)
+                goto out;
+
         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
-        nfs_post_op_update_inode(old_dir, &old_dir_attr);
-        nfs_post_op_update_inode(new_dir, &new_dir_attr);
+        nfs_post_op_update_inode(old_dir, res.fromattr);
+        nfs_post_op_update_inode(new_dir, res.toattr);
+out:
+        nfs_free_fattr(res.toattr);
+        nfs_free_fattr(res.fromattr);
         dprintk("NFS reply rename: %d\n", status);
         return status;
 }
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6591bd852f84..14cde99d8a60 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2656,29 +2656,31 @@ static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
                 .new_name = new_name,
                 .bitmask = server->attr_bitmask,
         };
-        struct nfs_fattr old_fattr, new_fattr;
         struct nfs4_rename_res res = {
                 .server = server,
-                .old_fattr = &old_fattr,
-                .new_fattr = &new_fattr,
         };
         struct rpc_message msg = {
                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
                 .rpc_argp = &arg,
                 .rpc_resp = &res,
         };
-        int                     status;
+        int status = -ENOMEM;
         
-        nfs_fattr_init(res.old_fattr);
-        nfs_fattr_init(res.new_fattr);
-        status = nfs4_call_sync(server, &msg, &arg, &res, 1);
+        res.old_fattr = nfs_alloc_fattr();
+        res.new_fattr = nfs_alloc_fattr();
+        if (res.old_fattr == NULL || res.new_fattr == NULL)
+                goto out;
 
+        status = nfs4_call_sync(server, &msg, &arg, &res, 1);
         if (!status) {
                 update_changeattr(old_dir, &res.old_cinfo);
                 nfs_post_op_update_inode(old_dir, res.old_fattr);
                 update_changeattr(new_dir, &res.new_cinfo);
                 nfs_post_op_update_inode(new_dir, res.new_fattr);
         }
+out:
+        nfs_free_fattr(res.new_fattr);
+        nfs_free_fattr(res.old_fattr);
         return status;
 }