release/src-rt-6.x.4708/linux/linux-2.6.36/fs/ext4/symlink.c

   1 /*
   2  *  linux/fs/ext4/symlink.c
   3  *
   4  * Only fast symlinks left here - the rest is done by generic code. AV, 1999
   5  *
   6  * Copyright (C) 1992, 1993, 1994, 1995
   7  * Remy Card (card@masi.ibp.fr)
   8  * Laboratoire MASI - Institut Blaise Pascal
   9  * Universite Pierre et Marie Curie (Paris VI)
  10  *
  11  *  from
  12  *
  13  *  linux/fs/minix/symlink.c
  14  *
  15  *  Copyright (C) 1991, 1992  Linus Torvalds
  16  *
  17  *  ext4 symlink handling code
  18  */
  19
  20 #include <linux/fs.h>
  21 #include <linux/jbd2.h>
  22 #include <linux/namei.h>
  23 #include "ext4.h"
  24 #include "xattr.h"
  25
  26 static void *ext4_follow_link(struct dentry *dentry, struct nameidata *nd)
  27 {
  28         struct ext4_inode_info *ei = EXT4_I(dentry->d_inode);
  29         nd_set_link(nd, (char *) ei->i_data);
  30         return NULL;
  31 }
  32
  33 const struct inode_operations ext4_symlink_inode_operations = {
  34         .readlink       = generic_readlink,
  35         .follow_link    = page_follow_link_light,
  36         .put_link       = page_put_link,
  37         .setattr        = ext4_setattr,
  38 #ifdef CONFIG_EXT4_FS_XATTR
  39         .setxattr       = generic_setxattr,
  40         .getxattr       = generic_getxattr,
  41         .listxattr      = ext4_listxattr,
  42         .removexattr    = generic_removexattr,
  43 #endif
  44 };
  45
  46 const struct inode_operations ext4_fast_symlink_inode_operations = {
  47         .readlink       = generic_readlink,
  48         .follow_link    = ext4_follow_link,
  49         .setattr        = ext4_setattr,
  50 #ifdef CONFIG_EXT4_FS_XATTR
  51         .setxattr       = generic_setxattr,
  52         .getxattr       = generic_getxattr,
  53         .listxattr      = ext4_listxattr,
  54         .removexattr    = generic_removexattr,
  55 #endif
  56 };