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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); | |
ba03bda8 | 81 | if (bp) { |
1da177e4 LT |
82 | struct vxfs_fsh *fhp; |
83 | ||
ba03bda8 PE |
84 | if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL))) |
85 | goto out; | |
1da177e4 LT |
86 | memcpy(fhp, bp->b_data, sizeof(*fhp)); |
87 | ||
ba03bda8 | 88 | put_bh(bp); |
1da177e4 LT |
89 | return (fhp); |
90 | } | |
ba03bda8 PE |
91 | out: |
92 | brelse(bp); | |
1da177e4 LT |
93 | return NULL; |
94 | } | |
95 | ||
96 | /** | |
97 | * vxfs_read_fshead - read the fileset headers | |
98 | * @sbp: superblock to which the fileset belongs | |
99 | * | |
100 | * Description: | |
101 | * vxfs_read_fshead will fill the inode and structural inode list in @sb. | |
102 | * | |
103 | * Returns: | |
104 | * Zero on success, else a negative error code (-EINVAL). | |
105 | */ | |
106 | int | |
107 | vxfs_read_fshead(struct super_block *sbp) | |
108 | { | |
109 | struct vxfs_sb_info *infp = VXFS_SBI(sbp); | |
110 | struct vxfs_fsh *pfp, *sfp; | |
111 | struct vxfs_inode_info *vip, *tip; | |
112 | ||
113 | vip = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino); | |
114 | if (!vip) { | |
552c0348 | 115 | printk(KERN_ERR "vxfs: unable to read fsh inode\n"); |
1da177e4 LT |
116 | return -EINVAL; |
117 | } | |
118 | if (!VXFS_ISFSH(vip)) { | |
119 | printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n", | |
120 | vip->vii_mode & VXFS_TYPE_MASK); | |
121 | goto out_free_fship; | |
122 | } | |
123 | ||
124 | ||
125 | #ifdef DIAGNOSTIC | |
126 | printk("vxfs: fsh inode dump:\n"); | |
127 | vxfs_dumpi(vip, infp->vsi_fshino); | |
128 | #endif | |
129 | ||
130 | infp->vsi_fship = vxfs_get_fake_inode(sbp, vip); | |
131 | if (!infp->vsi_fship) { | |
552c0348 | 132 | printk(KERN_ERR "vxfs: unable to get fsh inode\n"); |
1da177e4 LT |
133 | goto out_free_fship; |
134 | } | |
135 | ||
136 | sfp = vxfs_getfsh(infp->vsi_fship, 0); | |
137 | if (!sfp) { | |
552c0348 | 138 | printk(KERN_ERR "vxfs: unable to get structural fsh\n"); |
1da177e4 LT |
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) { | |
552c0348 | 148 | printk(KERN_ERR "vxfs: unable to get primary fsh\n"); |
1da177e4 LT |
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) | |
158 | goto out_free_pfp; | |
159 | ||
160 | infp->vsi_stilist = vxfs_get_fake_inode(sbp, tip); | |
161 | if (!infp->vsi_stilist) { | |
552c0348 | 162 | printk(KERN_ERR "vxfs: unable to get structural list inode\n"); |
1da177e4 LT |
163 | kfree(tip); |
164 | goto out_free_pfp; | |
165 | } | |
166 | if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) { | |
25985edc | 167 | printk(KERN_ERR "vxfs: structural list inode is of wrong type (%x)\n", |
1da177e4 LT |
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) { | |
552c0348 | 177 | printk(KERN_ERR "vxfs: unable to get inode list inode\n"); |
1da177e4 LT |
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 | } |