fs/jffs2/symlink.c

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright (C) 2001, 2002 Red Hat, Inc.
   5  *
   6  * Created by David Woodhouse <dwmw2@redhat.com>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  * $Id: symlink.c,v 1.12 2003/10/04 08:33:07 dwmw2 Exp $
  11  *
  12  */
  13
  14
  15 #include <linux/kernel.h>
  16 #include <linux/slab.h>
  17 #include <linux/fs.h>
  18 #include "nodelist.h"
  19
  20 int jffs2_readlink(struct dentry *dentry, char *buffer, int buflen);
  21 int jffs2_follow_link(struct dentry *dentry, struct nameidata *nd);
  22
  23 struct inode_operations jffs2_symlink_inode_operations =
  24 {
  25         .readlink =     jffs2_readlink,
  26         .follow_link =  jffs2_follow_link,
  27         .setattr =      jffs2_setattr
  28 };
  29
  30 int jffs2_readlink(struct dentry *dentry, char *buffer, int buflen)
  31 {
  32         unsigned char *kbuf;
  33         int ret;
  34
  35         kbuf = jffs2_getlink(JFFS2_SB_INFO(dentry->d_inode->i_sb), JFFS2_INODE_INFO(dentry->d_inode));
  36         if (IS_ERR(kbuf))
  37                 return PTR_ERR(kbuf);
  38
  39         ret = vfs_readlink(dentry, buffer, buflen, kbuf);
  40         kfree(kbuf);
  41         return ret;
  42 }
  43
  44 int jffs2_follow_link(struct dentry *dentry, struct nameidata *nd)
  45 {
  46         unsigned char *buf;
  47         int ret;
  48
  49         buf = jffs2_getlink(JFFS2_SB_INFO(dentry->d_inode->i_sb), JFFS2_INODE_INFO(dentry->d_inode));
  50
  51         if (IS_ERR(buf))
  52                 return PTR_ERR(buf);
  53
  54         ret = vfs_follow_link(nd, buf);
  55         kfree(buf);
  56         return ret;
  57 }