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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* cached_inode.c
*
* Cache inode structure for the OCFS2 userspace library.
*
* Copyright (C) 2004 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License, version 2, as published by the Free Software Foundation.
*
* 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. 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., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#define _XOPEN_SOURCE 600 /* Triggers XOPEN2K in features.h */
#define _LARGEFILE64_SOURCE
#define _DEFAULT_SOURCE
#include <string.h>
#include "ocfs2/ocfs2.h"
errcode_t ocfs2_read_cached_inode(ocfs2_filesys *fs, uint64_t blkno,
ocfs2_cached_inode **ret_ci)
{
errcode_t ret;
char *blk;
ocfs2_cached_inode *cinode;
if ((blkno < OCFS2_SUPER_BLOCK_BLKNO) ||
(blkno > fs->fs_blocks))
return OCFS2_ET_BAD_BLKNO;
ret = ocfs2_malloc0(sizeof(ocfs2_cached_inode), &cinode);
if (ret)
return ret;
cinode->ci_fs = fs;
cinode->ci_blkno = blkno;
ret = ocfs2_malloc_block(fs->fs_io, &blk);
if (ret)
goto cleanup;
cinode->ci_inode = (struct ocfs2_dinode *)blk;
ret = ocfs2_read_inode(fs, blkno, blk);
if (ret)
goto cleanup;
*ret_ci = cinode;
return 0;
cleanup:
ocfs2_free_cached_inode(fs, cinode);
return ret;
}
errcode_t ocfs2_free_cached_inode(ocfs2_filesys *fs,
ocfs2_cached_inode *cinode)
{
if (!cinode)
return OCFS2_ET_INVALID_ARGUMENT;
if (cinode->ci_chains)
ocfs2_bitmap_free(&cinode->ci_chains);
if (cinode->ci_inode)
ocfs2_free(&cinode->ci_inode);
ocfs2_free(&cinode);
return 0;
}
errcode_t ocfs2_write_cached_inode(ocfs2_filesys *fs,
ocfs2_cached_inode *cinode)
{
errcode_t ret;
if (!(fs->fs_flags & OCFS2_FLAG_RW))
return OCFS2_ET_RO_FILESYS;
if ((cinode->ci_blkno < OCFS2_SUPER_BLOCK_BLKNO) ||
(cinode->ci_blkno > fs->fs_blocks))
return OCFS2_ET_BAD_BLKNO;
ret = ocfs2_write_inode(fs, cinode->ci_blkno,
(char *)cinode->ci_inode);
return ret;
}
errcode_t ocfs2_refresh_cached_inode(ocfs2_filesys *fs,
ocfs2_cached_inode *cinode)
{
if (cinode->ci_chains) {
ocfs2_bitmap_free(&cinode->ci_chains);
cinode->ci_chains = NULL;
}
return ocfs2_read_inode(fs, cinode->ci_blkno,
(char *)cinode->ci_inode);
}
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