/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright (C) 2001, 2002 Red Hat, Inc. * * Created by David Woodhouse * * The original JFFS, from which the design for JFFS2 was derived, * was designed and implemented by Axis Communications AB. * * The contents of this file are subject to the Red Hat eCos Public * License Version 1.1 (the "Licence"); you may not use this file * except in compliance with the Licence. You may obtain a copy of * the Licence at http://www.redhat.com/ * * Software distributed under the Licence is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. * See the Licence for the specific language governing rights and * limitations under the Licence. * * The Original Code is JFFS2 - Journalling Flash File System, version 2 * * Alternatively, the contents of this file may be used under the * terms of the GNU General Public License version 2 (the "GPL"), in * which case the provisions of the GPL are applicable instead of the * above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the RHEPL, indicate your decision by * deleting the provisions above and replace them with the notice and * other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file * under either the RHEPL or the GPL. * * $Id: symlink.c,v 1.5.2.1 2002/01/15 10:39:06 dwmw2 Exp $ * */ #include #include #include #include #include "nodelist.h" int jffs2_readlink(struct dentry *dentry, char *buffer, int buflen); int jffs2_follow_link(struct dentry *dentry, struct nameidata *nd); struct inode_operations jffs2_symlink_inode_operations = { readlink: jffs2_readlink, follow_link: jffs2_follow_link, setattr: jffs2_setattr }; static char *jffs2_getlink(struct dentry *dentry) { struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode); char *buf; int ret; down(&f->sem); if (!f->metadata) { up(&f->sem); printk(KERN_NOTICE "No metadata for symlink inode #%lu\n", dentry->d_inode->i_ino); return ERR_PTR(-EINVAL); } buf = kmalloc(f->metadata->size+1, GFP_USER); if (!buf) { up(&f->sem); return ERR_PTR(-ENOMEM); } buf[f->metadata->size]=0; ret = jffs2_read_dnode(JFFS2_SB_INFO(dentry->d_inode->i_sb), f->metadata, buf, 0, f->metadata->size); up(&f->sem); if (ret) { kfree(buf); return ERR_PTR(ret); } return buf; } int jffs2_readlink(struct dentry *dentry, char *buffer, int buflen) { unsigned char *kbuf; int ret; kbuf = jffs2_getlink(dentry); if (IS_ERR(kbuf)) return PTR_ERR(kbuf); ret = vfs_readlink(dentry, buffer, buflen, kbuf); kfree(kbuf); return ret; } int jffs2_follow_link(struct dentry *dentry, struct nameidata *nd) { unsigned char *buf; int ret; buf = jffs2_getlink(dentry); if (IS_ERR(buf)) return PTR_ERR(buf); ret = vfs_follow_link(nd, buf); kfree(buf); return ret; }