204 lines
5.4 KiB
C
204 lines
5.4 KiB
C
/*
|
|
* Copyright (c) 2000-2001 Christoph Hellwig.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL").
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Veritas filesystem driver - fileset header routines.
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
|
|
#include "vxfs.h"
|
|
#include "vxfs_inode.h"
|
|
#include "vxfs_extern.h"
|
|
#include "vxfs_fshead.h"
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
static void
|
|
vxfs_dumpfsh(struct vxfs_fsh *fhp)
|
|
{
|
|
printk("\n\ndumping fileset header:\n");
|
|
printk("----------------------------\n");
|
|
printk("version: %u\n", fhp->fsh_version);
|
|
printk("fsindex: %u\n", fhp->fsh_fsindex);
|
|
printk("iauino: %u\tninodes:%u\n",
|
|
fhp->fsh_iauino, fhp->fsh_ninodes);
|
|
printk("maxinode: %u\tlctino: %u\n",
|
|
fhp->fsh_maxinode, fhp->fsh_lctino);
|
|
printk("nau: %u\n", fhp->fsh_nau);
|
|
printk("ilistino[0]: %u\tilistino[1]: %u\n",
|
|
fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* vxfs_getfsh - read fileset header into memory
|
|
* @ip: the (fake) fileset header inode
|
|
* @which: 0 for the structural, 1 for the primary fsh.
|
|
*
|
|
* Description:
|
|
* vxfs_getfsh reads either the structural or primary fileset header
|
|
* described by @ip into memory.
|
|
*
|
|
* Returns:
|
|
* The fileset header structure on success, else Zero.
|
|
*/
|
|
static struct vxfs_fsh *
|
|
vxfs_getfsh(struct inode *ip, int which)
|
|
{
|
|
struct buffer_head *bp;
|
|
|
|
bp = vxfs_bread(ip, which);
|
|
if (bp) {
|
|
struct vxfs_fsh *fhp;
|
|
|
|
if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL)))
|
|
goto out;
|
|
memcpy(fhp, bp->b_data, sizeof(*fhp));
|
|
|
|
put_bh(bp);
|
|
return (fhp);
|
|
}
|
|
out:
|
|
brelse(bp);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* vxfs_read_fshead - read the fileset headers
|
|
* @sbp: superblock to which the fileset belongs
|
|
*
|
|
* Description:
|
|
* vxfs_read_fshead will fill the inode and structural inode list in @sb.
|
|
*
|
|
* Returns:
|
|
* Zero on success, else a negative error code (-EINVAL).
|
|
*/
|
|
int
|
|
vxfs_read_fshead(struct super_block *sbp)
|
|
{
|
|
struct vxfs_sb_info *infp = VXFS_SBI(sbp);
|
|
struct vxfs_fsh *pfp, *sfp;
|
|
struct vxfs_inode_info *vip, *tip;
|
|
|
|
vip = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino);
|
|
if (!vip) {
|
|
printk(KERN_ERR "vxfs: unabled to read fsh inode\n");
|
|
return -EINVAL;
|
|
}
|
|
if (!VXFS_ISFSH(vip)) {
|
|
printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n",
|
|
vip->vii_mode & VXFS_TYPE_MASK);
|
|
goto out_free_fship;
|
|
}
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
printk("vxfs: fsh inode dump:\n");
|
|
vxfs_dumpi(vip, infp->vsi_fshino);
|
|
#endif
|
|
|
|
infp->vsi_fship = vxfs_get_fake_inode(sbp, vip);
|
|
if (!infp->vsi_fship) {
|
|
printk(KERN_ERR "vxfs: unabled to get fsh inode\n");
|
|
goto out_free_fship;
|
|
}
|
|
|
|
sfp = vxfs_getfsh(infp->vsi_fship, 0);
|
|
if (!sfp) {
|
|
printk(KERN_ERR "vxfs: unabled to get structural fsh\n");
|
|
goto out_iput_fship;
|
|
}
|
|
|
|
#ifdef DIAGNOSTIC
|
|
vxfs_dumpfsh(sfp);
|
|
#endif
|
|
|
|
pfp = vxfs_getfsh(infp->vsi_fship, 1);
|
|
if (!pfp) {
|
|
printk(KERN_ERR "vxfs: unabled to get primary fsh\n");
|
|
goto out_free_sfp;
|
|
}
|
|
|
|
#ifdef DIAGNOSTIC
|
|
vxfs_dumpfsh(pfp);
|
|
#endif
|
|
|
|
tip = vxfs_blkiget(sbp, infp->vsi_iext, sfp->fsh_ilistino[0]);
|
|
if (!tip)
|
|
goto out_free_pfp;
|
|
|
|
infp->vsi_stilist = vxfs_get_fake_inode(sbp, tip);
|
|
if (!infp->vsi_stilist) {
|
|
printk(KERN_ERR "vxfs: unabled to get structual list inode\n");
|
|
kfree(tip);
|
|
goto out_free_pfp;
|
|
}
|
|
if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) {
|
|
printk(KERN_ERR "vxfs: structual list inode is of wrong type (%x)\n",
|
|
VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK);
|
|
goto out_iput_stilist;
|
|
}
|
|
|
|
tip = vxfs_stiget(sbp, pfp->fsh_ilistino[0]);
|
|
if (!tip)
|
|
goto out_iput_stilist;
|
|
infp->vsi_ilist = vxfs_get_fake_inode(sbp, tip);
|
|
if (!infp->vsi_ilist) {
|
|
printk(KERN_ERR "vxfs: unabled to get inode list inode\n");
|
|
kfree(tip);
|
|
goto out_iput_stilist;
|
|
}
|
|
if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) {
|
|
printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n",
|
|
VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK);
|
|
goto out_iput_ilist;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_iput_ilist:
|
|
iput(infp->vsi_ilist);
|
|
out_iput_stilist:
|
|
iput(infp->vsi_stilist);
|
|
out_free_pfp:
|
|
kfree(pfp);
|
|
out_free_sfp:
|
|
kfree(sfp);
|
|
out_iput_fship:
|
|
iput(infp->vsi_fship);
|
|
return -EINVAL;
|
|
out_free_fship:
|
|
kfree(vip);
|
|
return -EINVAL;
|
|
}
|