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