symlink.c
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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* linux/cluster/ssi/cfs/symlink.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE
* or NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Questions/Comments/Bugfixes to ssic-linux-devel@lists.sourceforge.net
*
* Copyright (C) 1992 Rick Sladkey
*
* Optimization changes Copyright (C) 1994 Florian La Roche
*
* Jun 7 1999, cache symlink lookups in the page cache. -DaveM
*
* Portions Copyright (C) 2001 Compaq Computer Corporation
*
* ocfs2 symlink handling code.
*
* Copyright (C) 2004, 2005 Oracle.
*
*/
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/namei.h>
#include <cluster/masklog.h>
#include "ocfs2.h"
#include "alloc.h"
#include "file.h"
#include "inode.h"
#include "journal.h"
#include "symlink.h"
#include "xattr.h"
#include "buffer_head_io.h"
static int ocfs2_fast_symlink_readpage(struct file *unused, struct page *page)
{
struct inode *inode = page->mapping->host;
struct buffer_head *bh = NULL;
int status = ocfs2_read_inode_block(inode, &bh);
struct ocfs2_dinode *fe;
const char *link;
void *kaddr;
size_t len;
if (status < 0) {
mlog_errno(status);
return status;
}
fe = (struct ocfs2_dinode *) bh->b_data;
link = (char *) fe->id2.i_symlink;
/* will be less than a page size */
len = strnlen(link, ocfs2_fast_symlink_chars(inode->i_sb));
kaddr = kmap_atomic(page);
memcpy(kaddr, link, len + 1);
kunmap_atomic(kaddr);
SetPageUptodate(page);
unlock_page(page);
brelse(bh);
return 0;
}
const struct address_space_operations ocfs2_fast_symlink_aops = {
.readpage = ocfs2_fast_symlink_readpage,
};
const struct inode_operations ocfs2_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
.getattr = ocfs2_getattr,
.setattr = ocfs2_setattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ocfs2_listxattr,
.removexattr = generic_removexattr,
.fiemap = ocfs2_fiemap,
};