From: Miklos Szeredi <mszeredi@suse.cz>
Date: Wed, 23 Jul 2014 13:15:33 +0000 (+0200)
Subject: shmem: support RENAME_NOREPLACE
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3b69ff51d087d265aa4af3a532fc4f20bf33e718;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

shmem: support RENAME_NOREPLACE

Implement ->rename2 instead of ->rename.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/mm/shmem.c b/mm/shmem.c
index af68b15a8fc1..fe959181f995 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2054,11 +2054,14 @@ static int shmem_rmdir(struct inode *dir, struct dentry *dentry)
  * it exists so that the VFS layer correctly free's it when it
  * gets overwritten.
  */
-static int shmem_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry)
+static int shmem_rename2(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags)
 {
 	struct inode *inode = old_dentry->d_inode;
 	int they_are_dirs = S_ISDIR(inode->i_mode);
 
+	if (flags & ~(RENAME_NOREPLACE))
+		return -EINVAL;
+
 	if (!simple_empty(new_dentry))
 		return -ENOTEMPTY;
 
@@ -2741,7 +2744,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
 	.mkdir		= shmem_mkdir,
 	.rmdir		= shmem_rmdir,
 	.mknod		= shmem_mknod,
-	.rename		= shmem_rename,
+	.rename2	= shmem_rename2,
 	.tmpfile	= shmem_tmpfile,
 #endif
 #ifdef CONFIG_TMPFS_XATTR