[JFFS2][XATTR] XATTR support on JFFS2 (version. 5)

[pandora-kernel.git] / fs / jffs2 / xattr_user.c

diff --git a/fs/jffs2/xattr_user.c b/fs/jffs2/xattr_user.c
new file mode 100644 (file)
index 0000000..d8c1363
--- /dev/null
+++ b/fs/jffs2/xattr_user.c
@@ -0,0 +1,51 @@
+/*-------------------------------------------------------------------------*
+ *  File: fs/jffs2/xattr_user.c
+ *  XATTR support on JFFS2 FileSystem
+ *
+ *  Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
+ *  Copyright (C) 2006 NEC Corporation
+ *
+ *  For licensing information, see the file 'LICENCE' in the jffs2 directory.
+ *-------------------------------------------------------------------------*/
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/jffs2.h>
+#include <linux/xattr.h>
+#include <linux/mtd/mtd.h>
+#include "nodelist.h"
+
+static int jffs2_user_getxattr(struct inode *inode, const char *name,
+                               void *buffer, size_t size)
+{
+       if (!strcmp(name, ""))
+               return -EINVAL;
+       return do_jffs2_getxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size);
+}
+
+static int jffs2_user_setxattr(struct inode *inode, const char *name, const void *buffer,
+                               size_t size, int flags)
+{
+       if (!strcmp(name, ""))
+               return -EINVAL;
+       return do_jffs2_setxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size, flags);
+}
+
+static size_t jffs2_user_listxattr(struct inode *inode, char *list, size_t list_size,
+                                  const char *name, size_t name_len)
+{
+       size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
+
+       if (list && retlen <= list_size) {
+               strcpy(list, XATTR_USER_PREFIX);
+               strcpy(list + XATTR_USER_PREFIX_LEN, name);
+       }
+
+       return retlen;
+}
+
+struct xattr_handler jffs2_user_xattr_handler = {
+       .prefix = XATTR_USER_PREFIX,
+       .list = jffs2_user_listxattr,
+       .set = jffs2_user_setxattr,
+       .get = jffs2_user_getxattr
+};