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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [freevxfs/] [vxfs_fshead.c] - Blame information for rev 62

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Line No. Rev Author Line
1 62 marcus.erl
/*
2
 * Copyright (c) 2000-2001 Christoph Hellwig.
3
 * 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 (bp) {
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                struct vxfs_fsh         *fhp;
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                if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL)))
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                        goto out;
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                memcpy(fhp, bp->b_data, sizeof(*fhp));
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                put_bh(bp);
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                return (fhp);
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        }
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out:
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        brelse(bp);
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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: unable 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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125
#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);
131
        if (!infp->vsi_fship) {
132
                printk(KERN_ERR "vxfs: unable to get fsh inode\n");
133
                goto out_free_fship;
134
        }
135
 
136
        sfp = vxfs_getfsh(infp->vsi_fship, 0);
137
        if (!sfp) {
138
                printk(KERN_ERR "vxfs: unable to get structural fsh\n");
139
                goto out_iput_fship;
140
        }
141
 
142
#ifdef DIAGNOSTIC
143
        vxfs_dumpfsh(sfp);
144
#endif
145
 
146
        pfp = vxfs_getfsh(infp->vsi_fship, 1);
147
        if (!pfp) {
148
                printk(KERN_ERR "vxfs: unable to get primary fsh\n");
149
                goto out_free_sfp;
150
        }
151
 
152
#ifdef DIAGNOSTIC
153
        vxfs_dumpfsh(pfp);
154
#endif
155
 
156
        tip = vxfs_blkiget(sbp, infp->vsi_iext, sfp->fsh_ilistino[0]);
157
        if (!tip)
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                goto out_free_pfp;
159
 
160
        infp->vsi_stilist = vxfs_get_fake_inode(sbp, tip);
161
        if (!infp->vsi_stilist) {
162
                printk(KERN_ERR "vxfs: unable to get structural list inode\n");
163
                kfree(tip);
164
                goto out_free_pfp;
165
        }
166
        if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) {
167
                printk(KERN_ERR "vxfs: structual list inode is of wrong type (%x)\n",
168
                                VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK);
169
                goto out_iput_stilist;
170
        }
171
 
172
        tip = vxfs_stiget(sbp, pfp->fsh_ilistino[0]);
173
        if (!tip)
174
                goto out_iput_stilist;
175
        infp->vsi_ilist = vxfs_get_fake_inode(sbp, tip);
176
        if (!infp->vsi_ilist) {
177
                printk(KERN_ERR "vxfs: unable to get inode list inode\n");
178
                kfree(tip);
179
                goto out_iput_stilist;
180
        }
181
        if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) {
182
                printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n",
183
                                VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK);
184
                goto out_iput_ilist;
185
        }
186
 
187
        return 0;
188
 
189
 out_iput_ilist:
190
        iput(infp->vsi_ilist);
191
 out_iput_stilist:
192
        iput(infp->vsi_stilist);
193
 out_free_pfp:
194
        kfree(pfp);
195
 out_free_sfp:
196
        kfree(sfp);
197
 out_iput_fship:
198
        iput(infp->vsi_fship);
199
        return -EINVAL;
200
 out_free_fship:
201
        kfree(vip);
202
        return -EINVAL;
203
}

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