]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2001 Christoph Hellwig. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions, and the following disclaimer, | |
10 | * without modification. | |
11 | * 2. The name of the author may not be used to endorse or promote products | |
12 | * derived from this software without specific prior written permission. | |
13 | * | |
14 | * Alternatively, this software may be distributed under the terms of the | |
15 | * GNU General Public License ("GPL"). | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR | |
21 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
27 | * SUCH DAMAGE. | |
28 | */ | |
29 | ||
30 | /* | |
31 | * Veritas filesystem driver - fileset header routines. | |
32 | */ | |
33 | #include <linux/fs.h> | |
34 | #include <linux/buffer_head.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/string.h> | |
38 | ||
39 | #include "vxfs.h" | |
40 | #include "vxfs_inode.h" | |
41 | #include "vxfs_extern.h" | |
42 | #include "vxfs_fshead.h" | |
43 | ||
44 | ||
45 | #ifdef DIAGNOSTIC | |
46 | static void | |
47 | vxfs_dumpfsh(struct vxfs_fsh *fhp) | |
48 | { | |
49 | printk("\n\ndumping fileset header:\n"); | |
50 | printk("----------------------------\n"); | |
51 | printk("version: %u\n", fhp->fsh_version); | |
52 | printk("fsindex: %u\n", fhp->fsh_fsindex); | |
53 | printk("iauino: %u\tninodes:%u\n", | |
54 | fhp->fsh_iauino, fhp->fsh_ninodes); | |
55 | printk("maxinode: %u\tlctino: %u\n", | |
56 | fhp->fsh_maxinode, fhp->fsh_lctino); | |
57 | printk("nau: %u\n", fhp->fsh_nau); | |
58 | printk("ilistino[0]: %u\tilistino[1]: %u\n", | |
59 | fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]); | |
60 | } | |
61 | #endif | |
62 | ||
63 | /** | |
64 | * vxfs_getfsh - read fileset header into memory | |
65 | * @ip: the (fake) fileset header inode | |
66 | * @which: 0 for the structural, 1 for the primary fsh. | |
67 | * | |
68 | * Description: | |
69 | * vxfs_getfsh reads either the structural or primary fileset header | |
70 | * described by @ip into memory. | |
71 | * | |
72 | * Returns: | |
73 | * The fileset header structure on success, else Zero. | |
74 | */ | |
75 | static struct vxfs_fsh * | |
76 | vxfs_getfsh(struct inode *ip, int which) | |
77 | { | |
78 | struct buffer_head *bp; | |
79 | ||
80 | bp = vxfs_bread(ip, which); | |
81 | if (buffer_mapped(bp)) { | |
82 | struct vxfs_fsh *fhp; | |
83 | ||
84 | if (!(fhp = kmalloc(sizeof(*fhp), SLAB_KERNEL))) | |
85 | return NULL; | |
86 | memcpy(fhp, bp->b_data, sizeof(*fhp)); | |
87 | ||
88 | brelse(bp); | |
89 | return (fhp); | |
90 | } | |
91 | ||
92 | return NULL; | |
93 | } | |
94 | ||
95 | /** | |
96 | * vxfs_read_fshead - read the fileset headers | |
97 | * @sbp: superblock to which the fileset belongs | |
98 | * | |
99 | * Description: | |
100 | * vxfs_read_fshead will fill the inode and structural inode list in @sb. | |
101 | * | |
102 | * Returns: | |
103 | * Zero on success, else a negative error code (-EINVAL). | |
104 | */ | |
105 | int | |
106 | vxfs_read_fshead(struct super_block *sbp) | |
107 | { | |
108 | struct vxfs_sb_info *infp = VXFS_SBI(sbp); | |
109 | struct vxfs_fsh *pfp, *sfp; | |
110 | struct vxfs_inode_info *vip, *tip; | |
111 | ||
112 | vip = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino); | |
113 | if (!vip) { | |
114 | printk(KERN_ERR "vxfs: unabled to read fsh inode\n"); | |
115 | return -EINVAL; | |
116 | } | |
117 | if (!VXFS_ISFSH(vip)) { | |
118 | printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n", | |
119 | vip->vii_mode & VXFS_TYPE_MASK); | |
120 | goto out_free_fship; | |
121 | } | |
122 | ||
123 | ||
124 | #ifdef DIAGNOSTIC | |
125 | printk("vxfs: fsh inode dump:\n"); | |
126 | vxfs_dumpi(vip, infp->vsi_fshino); | |
127 | #endif | |
128 | ||
129 | infp->vsi_fship = vxfs_get_fake_inode(sbp, vip); | |
130 | if (!infp->vsi_fship) { | |
131 | printk(KERN_ERR "vxfs: unabled to get fsh inode\n"); | |
132 | goto out_free_fship; | |
133 | } | |
134 | ||
135 | sfp = vxfs_getfsh(infp->vsi_fship, 0); | |
136 | if (!sfp) { | |
137 | printk(KERN_ERR "vxfs: unabled to get structural fsh\n"); | |
138 | goto out_iput_fship; | |
139 | } | |
140 | ||
141 | #ifdef DIAGNOSTIC | |
142 | vxfs_dumpfsh(sfp); | |
143 | #endif | |
144 | ||
145 | pfp = vxfs_getfsh(infp->vsi_fship, 1); | |
146 | if (!pfp) { | |
147 | printk(KERN_ERR "vxfs: unabled to get primary fsh\n"); | |
148 | goto out_free_sfp; | |
149 | } | |
150 | ||
151 | #ifdef DIAGNOSTIC | |
152 | vxfs_dumpfsh(pfp); | |
153 | #endif | |
154 | ||
155 | tip = vxfs_blkiget(sbp, infp->vsi_iext, sfp->fsh_ilistino[0]); | |
156 | if (!tip) | |
157 | goto out_free_pfp; | |
158 | ||
159 | infp->vsi_stilist = vxfs_get_fake_inode(sbp, tip); | |
160 | if (!infp->vsi_stilist) { | |
161 | printk(KERN_ERR "vxfs: unabled to get structual list inode\n"); | |
162 | kfree(tip); | |
163 | goto out_free_pfp; | |
164 | } | |
165 | if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) { | |
166 | printk(KERN_ERR "vxfs: structual list inode is of wrong type (%x)\n", | |
167 | VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK); | |
168 | goto out_iput_stilist; | |
169 | } | |
170 | ||
171 | tip = vxfs_stiget(sbp, pfp->fsh_ilistino[0]); | |
172 | if (!tip) | |
173 | goto out_iput_stilist; | |
174 | infp->vsi_ilist = vxfs_get_fake_inode(sbp, tip); | |
175 | if (!infp->vsi_ilist) { | |
176 | printk(KERN_ERR "vxfs: unabled to get inode list inode\n"); | |
177 | kfree(tip); | |
178 | goto out_iput_stilist; | |
179 | } | |
180 | if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) { | |
181 | printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n", | |
182 | VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK); | |
183 | goto out_iput_ilist; | |
184 | } | |
185 | ||
186 | return 0; | |
187 | ||
188 | out_iput_ilist: | |
189 | iput(infp->vsi_ilist); | |
190 | out_iput_stilist: | |
191 | iput(infp->vsi_stilist); | |
192 | out_free_pfp: | |
193 | kfree(pfp); | |
194 | out_free_sfp: | |
195 | kfree(sfp); | |
196 | out_iput_fship: | |
197 | iput(infp->vsi_fship); | |
198 | return -EINVAL; | |
199 | out_free_fship: | |
200 | kfree(vip); | |
201 | return -EINVAL; | |
202 | } |