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0b1e987c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * Copyright (c) 2000-2001 Christoph Hellwig. | |
1cce1701 | 4 | * Copyright (c) 2016 Krzysztof Blaszkowski |
1da177e4 LT |
5 | */ |
6 | ||
7 | /* | |
8 | * Veritas filesystem driver - fileset header routines. | |
9 | */ | |
10 | #include <linux/fs.h> | |
11 | #include <linux/buffer_head.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/string.h> | |
15 | ||
16 | #include "vxfs.h" | |
17 | #include "vxfs_inode.h" | |
18 | #include "vxfs_extern.h" | |
19 | #include "vxfs_fshead.h" | |
20 | ||
21 | ||
22 | #ifdef DIAGNOSTIC | |
23 | static void | |
24 | vxfs_dumpfsh(struct vxfs_fsh *fhp) | |
25 | { | |
26 | printk("\n\ndumping fileset header:\n"); | |
27 | printk("----------------------------\n"); | |
28 | printk("version: %u\n", fhp->fsh_version); | |
29 | printk("fsindex: %u\n", fhp->fsh_fsindex); | |
30 | printk("iauino: %u\tninodes:%u\n", | |
31 | fhp->fsh_iauino, fhp->fsh_ninodes); | |
32 | printk("maxinode: %u\tlctino: %u\n", | |
33 | fhp->fsh_maxinode, fhp->fsh_lctino); | |
34 | printk("nau: %u\n", fhp->fsh_nau); | |
35 | printk("ilistino[0]: %u\tilistino[1]: %u\n", | |
36 | fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]); | |
37 | } | |
38 | #endif | |
39 | ||
40 | /** | |
41 | * vxfs_getfsh - read fileset header into memory | |
42 | * @ip: the (fake) fileset header inode | |
43 | * @which: 0 for the structural, 1 for the primary fsh. | |
44 | * | |
45 | * Description: | |
46 | * vxfs_getfsh reads either the structural or primary fileset header | |
47 | * described by @ip into memory. | |
48 | * | |
49 | * Returns: | |
50 | * The fileset header structure on success, else Zero. | |
51 | */ | |
52 | static struct vxfs_fsh * | |
53 | vxfs_getfsh(struct inode *ip, int which) | |
54 | { | |
55 | struct buffer_head *bp; | |
56 | ||
57 | bp = vxfs_bread(ip, which); | |
ba03bda8 | 58 | if (bp) { |
1da177e4 LT |
59 | struct vxfs_fsh *fhp; |
60 | ||
ba03bda8 PE |
61 | if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL))) |
62 | goto out; | |
1da177e4 LT |
63 | memcpy(fhp, bp->b_data, sizeof(*fhp)); |
64 | ||
ba03bda8 | 65 | put_bh(bp); |
1da177e4 LT |
66 | return (fhp); |
67 | } | |
ba03bda8 PE |
68 | out: |
69 | brelse(bp); | |
1da177e4 LT |
70 | return NULL; |
71 | } | |
72 | ||
73 | /** | |
74 | * vxfs_read_fshead - read the fileset headers | |
75 | * @sbp: superblock to which the fileset belongs | |
76 | * | |
77 | * Description: | |
78 | * vxfs_read_fshead will fill the inode and structural inode list in @sb. | |
79 | * | |
80 | * Returns: | |
81 | * Zero on success, else a negative error code (-EINVAL). | |
82 | */ | |
83 | int | |
84 | vxfs_read_fshead(struct super_block *sbp) | |
85 | { | |
86 | struct vxfs_sb_info *infp = VXFS_SBI(sbp); | |
87 | struct vxfs_fsh *pfp, *sfp; | |
8985f53e | 88 | struct vxfs_inode_info *vip; |
1da177e4 | 89 | |
8985f53e KB |
90 | infp->vsi_fship = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino); |
91 | if (!infp->vsi_fship) { | |
552c0348 | 92 | printk(KERN_ERR "vxfs: unable to read fsh inode\n"); |
1da177e4 LT |
93 | return -EINVAL; |
94 | } | |
8985f53e KB |
95 | |
96 | vip = VXFS_INO(infp->vsi_fship); | |
1da177e4 LT |
97 | if (!VXFS_ISFSH(vip)) { |
98 | printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n", | |
99 | vip->vii_mode & VXFS_TYPE_MASK); | |
8985f53e | 100 | goto out_iput_fship; |
1da177e4 LT |
101 | } |
102 | ||
1da177e4 LT |
103 | #ifdef DIAGNOSTIC |
104 | printk("vxfs: fsh inode dump:\n"); | |
105 | vxfs_dumpi(vip, infp->vsi_fshino); | |
106 | #endif | |
107 | ||
1da177e4 LT |
108 | sfp = vxfs_getfsh(infp->vsi_fship, 0); |
109 | if (!sfp) { | |
552c0348 | 110 | printk(KERN_ERR "vxfs: unable to get structural fsh\n"); |
1da177e4 LT |
111 | goto out_iput_fship; |
112 | } | |
113 | ||
114 | #ifdef DIAGNOSTIC | |
115 | vxfs_dumpfsh(sfp); | |
116 | #endif | |
117 | ||
118 | pfp = vxfs_getfsh(infp->vsi_fship, 1); | |
119 | if (!pfp) { | |
552c0348 | 120 | printk(KERN_ERR "vxfs: unable to get primary fsh\n"); |
1da177e4 LT |
121 | goto out_free_sfp; |
122 | } | |
123 | ||
124 | #ifdef DIAGNOSTIC | |
125 | vxfs_dumpfsh(pfp); | |
126 | #endif | |
127 | ||
8985f53e | 128 | infp->vsi_stilist = vxfs_blkiget(sbp, infp->vsi_iext, |
0d83f7fc | 129 | fs32_to_cpu(infp, sfp->fsh_ilistino[0])); |
1da177e4 | 130 | if (!infp->vsi_stilist) { |
552c0348 | 131 | printk(KERN_ERR "vxfs: unable to get structural list inode\n"); |
1da177e4 LT |
132 | goto out_free_pfp; |
133 | } | |
134 | if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) { | |
25985edc | 135 | printk(KERN_ERR "vxfs: structural list inode is of wrong type (%x)\n", |
1da177e4 LT |
136 | VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK); |
137 | goto out_iput_stilist; | |
138 | } | |
139 | ||
8985f53e | 140 | infp->vsi_ilist = vxfs_stiget(sbp, fs32_to_cpu(infp, pfp->fsh_ilistino[0])); |
1da177e4 | 141 | if (!infp->vsi_ilist) { |
552c0348 | 142 | printk(KERN_ERR "vxfs: unable to get inode list inode\n"); |
1da177e4 LT |
143 | goto out_iput_stilist; |
144 | } | |
145 | if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) { | |
146 | printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n", | |
147 | VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK); | |
148 | goto out_iput_ilist; | |
149 | } | |
150 | ||
263040a1 KB |
151 | kfree(pfp); |
152 | kfree(sfp); | |
1da177e4 LT |
153 | return 0; |
154 | ||
155 | out_iput_ilist: | |
156 | iput(infp->vsi_ilist); | |
157 | out_iput_stilist: | |
158 | iput(infp->vsi_stilist); | |
159 | out_free_pfp: | |
160 | kfree(pfp); | |
161 | out_free_sfp: | |
162 | kfree(sfp); | |
163 | out_iput_fship: | |
164 | iput(infp->vsi_fship); | |
165 | return -EINVAL; | |
1da177e4 | 166 | } |