fs/jffs2/xattr_user.c

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright © 2006  NEC Corporation
   5  *
   6  * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/fs.h>
  14 #include <linux/jffs2.h>
  15 #include <linux/xattr.h>
  16 #include <linux/mtd/mtd.h>
  17 #include "nodelist.h"
  18
  19 static int jffs2_user_getxattr(const struct xattr_handler *handler,
  20                                struct dentry *dentry, const char *name,
  21                                void *buffer, size_t size)
  22 {
  23         if (!strcmp(name, ""))
  24                 return -EINVAL;
  25         return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_USER,
  26                                  name, buffer, size);
  27 }
  28
  29 static int jffs2_user_setxattr(const struct xattr_handler *handler,
  30                                struct dentry *dentry, const char *name,
  31                                const void *buffer, size_t size, int flags)
  32 {
  33         if (!strcmp(name, ""))
  34                 return -EINVAL;
  35         return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_USER,
  36                                  name, buffer, size, flags);
  37 }
  38
  39 static size_t jffs2_user_listxattr(const struct xattr_handler *handler,
  40                                    struct dentry *dentry, char *list,
  41                                    size_t list_size, const char *name,
  42                                    size_t name_len)
  43 {
  44         size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
  45
  46         if (list && retlen <= list_size) {
  47                 strcpy(list, XATTR_USER_PREFIX);
  48                 strcpy(list + XATTR_USER_PREFIX_LEN, name);
  49         }
  50
  51         return retlen;
  52 }
  53
  54 const struct xattr_handler jffs2_user_xattr_handler = {
  55         .prefix = XATTR_USER_PREFIX,
  56         .list = jffs2_user_listxattr,
  57         .set = jffs2_user_setxattr,
  58         .get = jffs2_user_getxattr
  59 };