symlink.c (2b79adcca147c9f8fd1094ab4cb342d7e1790d70) symlink.c (182ec4eee397543101a6db8906ed88727d3f7e53)
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@infradead.org>
7 *
8 * For licensing information, see the file 'LICENCE' in this directory.
9 *
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@infradead.org>
7 *
8 * For licensing information, see the file 'LICENCE' in this directory.
9 *
10 * $Id: symlink.c,v 1.18 2005/11/06 11:03:27 gleixner Exp $
10 * $Id: symlink.c,v 1.19 2005/11/07 11:14:42 gleixner Exp $
11 *
12 */
13
14
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/fs.h>
18#include <linux/namei.h>
19#include "nodelist.h"
20
21static void *jffs2_follow_link(struct dentry *dentry, struct nameidata *nd);
22
23struct inode_operations jffs2_symlink_inode_operations =
11 *
12 */
13
14
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/fs.h>
18#include <linux/namei.h>
19#include "nodelist.h"
20
21static void *jffs2_follow_link(struct dentry *dentry, struct nameidata *nd);
22
23struct inode_operations jffs2_symlink_inode_operations =
24{
24{
25 .readlink = generic_readlink,
26 .follow_link = jffs2_follow_link,
27 .setattr = jffs2_setattr
28};
29
30static void *jffs2_follow_link(struct dentry *dentry, struct nameidata *nd)
31{
32 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);

--- 6 unchanged lines hidden (view full) ---

39 * 1. If we are here the inode has already built and f->target has
40 * to point to the target path.
41 * 2. Nobody uses f->target (if the inode is symlink's inode). The
42 * exception is inode freeing function which frees f->target. But
43 * it can't be called while we are here and before VFS has
44 * stopped using our f->target string which we provide by means of
45 * nd_set_link() call.
46 */
25 .readlink = generic_readlink,
26 .follow_link = jffs2_follow_link,
27 .setattr = jffs2_setattr
28};
29
30static void *jffs2_follow_link(struct dentry *dentry, struct nameidata *nd)
31{
32 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);

--- 6 unchanged lines hidden (view full) ---

39 * 1. If we are here the inode has already built and f->target has
40 * to point to the target path.
41 * 2. Nobody uses f->target (if the inode is symlink's inode). The
42 * exception is inode freeing function which frees f->target. But
43 * it can't be called while we are here and before VFS has
44 * stopped using our f->target string which we provide by means of
45 * nd_set_link() call.
46 */
47
47
48 if (!p) {
49 printk(KERN_ERR "jffs2_follow_link(): can't find symlink taerget\n");
50 p = ERR_PTR(-EIO);
51 }
52 D1(printk(KERN_DEBUG "jffs2_follow_link(): target path is '%s'\n", (char *) f->target));
53
54 nd_set_link(nd, p);
48 if (!p) {
49 printk(KERN_ERR "jffs2_follow_link(): can't find symlink taerget\n");
50 p = ERR_PTR(-EIO);
51 }
52 D1(printk(KERN_DEBUG "jffs2_follow_link(): target path is '%s'\n", (char *) f->target));
53
54 nd_set_link(nd, p);
55
55
56 /*
57 * We will unlock the f->sem mutex but VFS will use the f->target string. This is safe
58 * since the only way that may cause f->target to be changed is iput() operation.
59 * But VFS will not use f->target after iput() has been called.
60 */
61 return NULL;
62}
63
56 /*
57 * We will unlock the f->sem mutex but VFS will use the f->target string. This is safe
58 * since the only way that may cause f->target to be changed is iput() operation.
59 * But VFS will not use f->target after iput() has been called.
60 */
61 return NULL;
62}
63