1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
* 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: unable 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: unable to get fsh inode\n");
goto out_free_fship;
}
sfp = vxfs_getfsh(infp->vsi_fship, 0);
if (!sfp) {
printk(KERN_ERR "vxfs: unable 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: unable 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: unable to get structural list inode\n");
kfree(tip);
goto out_free_pfp;
}
if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) {
printk(KERN_ERR "vxfs: structural 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: unable 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;
}
|
