patch-2.4.10 linux/fs/jffs2/symlink.c

• Lines: 106
• Date: Fri Sep 14 14:04:07 2001
• Orig file: v2.4.9/linux/fs/jffs2/symlink.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/fs/jffs2/symlink.c linux/fs/jffs2/symlink.c
@@ -0,0 +1,105 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
+ *
+ * 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 2001/03/15 15:38:24 dwmw2 Exp $
+ *
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/jffs2.h>
+#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;
+
+	if (!f->metadata) {
+		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)
+		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);
+	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;
+}