/*
 *  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_read_folio(struct file *f, struct folio *folio)
{
        struct inode *inode = folio->mapping->host;
        struct buffer_head *bh = NULL;
        int status = ocfs2_read_inode_block(inode, &bh);
        struct ocfs2_dinode *fe;
        const char *link;
        size_t len;

        if (status < 0) {
                mlog_errno(status);
                goto out;
        }

        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));
        memcpy_to_folio(folio, 0, link, len + 1);
out:
        folio_end_read(folio, status == 0);
        brelse(bh);
        return status;
}

const struct address_space_operations ocfs2_fast_symlink_aops = {
        .read_folio             = ocfs2_fast_symlink_read_folio,
};

const struct inode_operations ocfs2_symlink_inode_operations = {
        .get_link       = page_get_link,
        .getattr        = ocfs2_getattr,
        .setattr        = ocfs2_setattr,
        .listxattr      = ocfs2_listxattr,
        .fiemap         = ocfs2_fiemap,
};