1 |
1275 |
phoenix |
/*
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2 |
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* linux/fs/isofs/inode.c
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3 |
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*
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4 |
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* (C) 1991 Linus Torvalds - minix filesystem
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5 |
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* 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem.
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6 |
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* 1994 Eberhard Moenkeberg - multi session handling.
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7 |
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* 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs.
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8 |
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* 1997 Gordon Chaffee - Joliet CDs
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9 |
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* 1998 Eric Lammerts - ISO 9660 Level 3
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10 |
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*/
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11 |
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12 |
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#include <linux/config.h>
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13 |
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#include <linux/module.h>
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14 |
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15 |
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#include <linux/stat.h>
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16 |
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#include <linux/sched.h>
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17 |
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#include <linux/iso_fs.h>
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18 |
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#include <linux/kernel.h>
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19 |
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#include <linux/major.h>
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20 |
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#include <linux/mm.h>
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21 |
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#include <linux/string.h>
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22 |
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#include <linux/locks.h>
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23 |
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#include <linux/slab.h>
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24 |
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#include <linux/errno.h>
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25 |
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#include <linux/cdrom.h>
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26 |
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#include <linux/init.h>
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27 |
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#include <linux/nls.h>
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28 |
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#include <linux/ctype.h>
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29 |
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#include <linux/smp_lock.h>
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30 |
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#include <linux/blkdev.h>
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31 |
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32 |
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#include <asm/system.h>
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33 |
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#include <asm/uaccess.h>
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34 |
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|
35 |
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#include "zisofs.h"
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36 |
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|
37 |
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/*
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38 |
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* We have no support for "multi volume" CDs, but more and more disks carry
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39 |
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* wrong information within the volume descriptors.
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40 |
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*/
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41 |
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#define IGNORE_WRONG_MULTI_VOLUME_SPECS
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42 |
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#define BEQUIET
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43 |
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44 |
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#ifdef LEAK_CHECK
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45 |
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static int check_malloc = 0;
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46 |
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static int check_bread = 0;
|
47 |
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#endif
|
48 |
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|
49 |
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static int isofs_hashi(struct dentry *parent, struct qstr *qstr);
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50 |
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static int isofs_hash(struct dentry *parent, struct qstr *qstr);
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51 |
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static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b);
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52 |
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static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b);
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53 |
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54 |
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#ifdef CONFIG_JOLIET
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55 |
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static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr);
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56 |
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static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr);
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57 |
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static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
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58 |
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static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
|
59 |
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#endif
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60 |
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61 |
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static void isofs_put_super(struct super_block *sb)
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62 |
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{
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63 |
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#ifdef CONFIG_JOLIET
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64 |
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if (sb->u.isofs_sb.s_nls_iocharset) {
|
65 |
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unload_nls(sb->u.isofs_sb.s_nls_iocharset);
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66 |
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sb->u.isofs_sb.s_nls_iocharset = NULL;
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67 |
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}
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68 |
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#endif
|
69 |
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|
70 |
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#ifdef LEAK_CHECK
|
71 |
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printk("Outstanding mallocs:%d, outstanding buffers: %d\n",
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72 |
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check_malloc, check_bread);
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73 |
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#endif
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74 |
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75 |
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return;
|
76 |
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}
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77 |
|
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|
78 |
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static void isofs_read_inode(struct inode *);
|
79 |
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static int isofs_statfs (struct super_block *, struct statfs *);
|
80 |
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|
81 |
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static struct super_operations isofs_sops = {
|
82 |
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read_inode: isofs_read_inode,
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83 |
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put_super: isofs_put_super,
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84 |
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statfs: isofs_statfs,
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85 |
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};
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86 |
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87 |
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static struct dentry_operations isofs_dentry_ops[] = {
|
88 |
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{
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89 |
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d_hash: isofs_hash,
|
90 |
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d_compare: isofs_dentry_cmp,
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91 |
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},
|
92 |
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{
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93 |
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d_hash: isofs_hashi,
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94 |
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d_compare: isofs_dentry_cmpi,
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95 |
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},
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96 |
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#ifdef CONFIG_JOLIET
|
97 |
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{
|
98 |
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d_hash: isofs_hash_ms,
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99 |
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d_compare: isofs_dentry_cmp_ms,
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100 |
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},
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101 |
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{
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102 |
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d_hash: isofs_hashi_ms,
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103 |
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d_compare: isofs_dentry_cmpi_ms,
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104 |
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}
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105 |
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#endif
|
106 |
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};
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107 |
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108 |
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struct iso9660_options{
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109 |
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char map;
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110 |
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char rock;
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111 |
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char joliet;
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112 |
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char cruft;
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113 |
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char unhide;
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114 |
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char nocompress;
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115 |
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unsigned char check;
|
116 |
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unsigned int blocksize;
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117 |
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mode_t mode;
|
118 |
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gid_t gid;
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119 |
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uid_t uid;
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120 |
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char *iocharset;
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121 |
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unsigned char utf8;
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122 |
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/* LVE */
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123 |
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s32 session;
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124 |
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s32 sbsector;
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125 |
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};
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126 |
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127 |
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/*
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128 |
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* Compute the hash for the isofs name corresponding to the dentry.
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129 |
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*/
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130 |
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static int
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131 |
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isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
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132 |
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{
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133 |
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const char *name;
|
134 |
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int len;
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135 |
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136 |
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len = qstr->len;
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137 |
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name = qstr->name;
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138 |
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if (ms) {
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139 |
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while (len && name[len-1] == '.')
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140 |
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len--;
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141 |
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}
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142 |
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143 |
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qstr->hash = full_name_hash(name, len);
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144 |
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145 |
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return 0;
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146 |
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}
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147 |
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|
148 |
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/*
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149 |
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* Compute the hash for the isofs name corresponding to the dentry.
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150 |
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*/
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151 |
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static int
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152 |
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isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
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153 |
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{
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154 |
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const char *name;
|
155 |
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int len;
|
156 |
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char c;
|
157 |
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unsigned long hash;
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158 |
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|
159 |
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len = qstr->len;
|
160 |
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name = qstr->name;
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161 |
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if (ms) {
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162 |
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while (len && name[len-1] == '.')
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163 |
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len--;
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164 |
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}
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165 |
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166 |
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hash = init_name_hash();
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167 |
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while (len--) {
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168 |
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c = tolower(*name++);
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169 |
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hash = partial_name_hash(tolower(c), hash);
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170 |
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}
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171 |
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qstr->hash = end_name_hash(hash);
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172 |
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173 |
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return 0;
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174 |
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}
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175 |
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176 |
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/*
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177 |
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* Case insensitive compare of two isofs names.
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178 |
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*/
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179 |
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static int
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180 |
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isofs_dentry_cmpi_common(struct dentry *dentry,struct qstr *a,struct qstr *b,int ms)
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181 |
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{
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182 |
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int alen, blen;
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183 |
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184 |
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/* A filename cannot end in '.' or we treat it like it has none */
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185 |
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alen = a->len;
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186 |
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blen = b->len;
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187 |
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if (ms) {
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188 |
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while (alen && a->name[alen-1] == '.')
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189 |
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alen--;
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190 |
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while (blen && b->name[blen-1] == '.')
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191 |
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blen--;
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192 |
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}
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193 |
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if (alen == blen) {
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194 |
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if (strnicmp(a->name, b->name, alen) == 0)
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195 |
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return 0;
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196 |
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}
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197 |
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return 1;
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198 |
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}
|
199 |
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|
200 |
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/*
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201 |
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* Case sensitive compare of two isofs names.
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202 |
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*/
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203 |
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static int
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204 |
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isofs_dentry_cmp_common(struct dentry *dentry,struct qstr *a,struct qstr *b,int ms)
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205 |
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{
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206 |
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int alen, blen;
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207 |
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|
208 |
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/* A filename cannot end in '.' or we treat it like it has none */
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209 |
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alen = a->len;
|
210 |
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blen = b->len;
|
211 |
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if (ms) {
|
212 |
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while (alen && a->name[alen-1] == '.')
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213 |
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alen--;
|
214 |
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while (blen && b->name[blen-1] == '.')
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215 |
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blen--;
|
216 |
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}
|
217 |
|
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if (alen == blen) {
|
218 |
|
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if (strncmp(a->name, b->name, alen) == 0)
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219 |
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return 0;
|
220 |
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}
|
221 |
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return 1;
|
222 |
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}
|
223 |
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|
224 |
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static int
|
225 |
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isofs_hash(struct dentry *dentry, struct qstr *qstr)
|
226 |
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{
|
227 |
|
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return isofs_hash_common(dentry, qstr, 0);
|
228 |
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}
|
229 |
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|
230 |
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static int
|
231 |
|
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isofs_hashi(struct dentry *dentry, struct qstr *qstr)
|
232 |
|
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{
|
233 |
|
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return isofs_hashi_common(dentry, qstr, 0);
|
234 |
|
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}
|
235 |
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|
236 |
|
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static int
|
237 |
|
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isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b)
|
238 |
|
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{
|
239 |
|
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return isofs_dentry_cmp_common(dentry, a, b, 0);
|
240 |
|
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}
|
241 |
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|
242 |
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static int
|
243 |
|
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isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b)
|
244 |
|
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{
|
245 |
|
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return isofs_dentry_cmpi_common(dentry, a, b, 0);
|
246 |
|
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}
|
247 |
|
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|
248 |
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#ifdef CONFIG_JOLIET
|
249 |
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static int
|
250 |
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isofs_hash_ms(struct dentry *dentry, struct qstr *qstr)
|
251 |
|
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{
|
252 |
|
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return isofs_hash_common(dentry, qstr, 1);
|
253 |
|
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}
|
254 |
|
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|
255 |
|
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static int
|
256 |
|
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isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr)
|
257 |
|
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{
|
258 |
|
|
return isofs_hashi_common(dentry, qstr, 1);
|
259 |
|
|
}
|
260 |
|
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|
261 |
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static int
|
262 |
|
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isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
|
263 |
|
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{
|
264 |
|
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return isofs_dentry_cmp_common(dentry, a, b, 1);
|
265 |
|
|
}
|
266 |
|
|
|
267 |
|
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static int
|
268 |
|
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isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
|
269 |
|
|
{
|
270 |
|
|
return isofs_dentry_cmpi_common(dentry, a, b, 1);
|
271 |
|
|
}
|
272 |
|
|
#endif
|
273 |
|
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|
274 |
|
|
static int parse_options(char *options, struct iso9660_options * popt)
|
275 |
|
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{
|
276 |
|
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char *this_char,*value;
|
277 |
|
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|
278 |
|
|
popt->map = 'n';
|
279 |
|
|
popt->rock = 'y';
|
280 |
|
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popt->joliet = 'y';
|
281 |
|
|
popt->cruft = 'n';
|
282 |
|
|
popt->unhide = 'n';
|
283 |
|
|
popt->check = 'u'; /* unset */
|
284 |
|
|
popt->nocompress = 0;
|
285 |
|
|
popt->blocksize = 1024;
|
286 |
|
|
popt->mode = S_IRUGO | S_IXUGO; /* r-x for all. The disc could
|
287 |
|
|
be shared with DOS machines so
|
288 |
|
|
virtually anything could be
|
289 |
|
|
a valid executable. */
|
290 |
|
|
popt->gid = 0;
|
291 |
|
|
popt->uid = 0;
|
292 |
|
|
popt->iocharset = NULL;
|
293 |
|
|
popt->utf8 = 0;
|
294 |
|
|
popt->session=-1;
|
295 |
|
|
popt->sbsector=-1;
|
296 |
|
|
if (!options) return 1;
|
297 |
|
|
for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) {
|
298 |
|
|
if (strncmp(this_char,"norock",6) == 0) {
|
299 |
|
|
popt->rock = 'n';
|
300 |
|
|
continue;
|
301 |
|
|
}
|
302 |
|
|
if (strncmp(this_char,"nojoliet",8) == 0) {
|
303 |
|
|
popt->joliet = 'n';
|
304 |
|
|
continue;
|
305 |
|
|
}
|
306 |
|
|
if (strncmp(this_char,"unhide",6) == 0) {
|
307 |
|
|
popt->unhide = 'y';
|
308 |
|
|
continue;
|
309 |
|
|
}
|
310 |
|
|
if (strncmp(this_char,"cruft",5) == 0) {
|
311 |
|
|
popt->cruft = 'y';
|
312 |
|
|
continue;
|
313 |
|
|
}
|
314 |
|
|
if (strncmp(this_char,"utf8",4) == 0) {
|
315 |
|
|
popt->utf8 = 1;
|
316 |
|
|
continue;
|
317 |
|
|
}
|
318 |
|
|
if (strncmp(this_char,"nocompress",10) == 0) {
|
319 |
|
|
popt->nocompress = 1;
|
320 |
|
|
continue;
|
321 |
|
|
}
|
322 |
|
|
if ((value = strchr(this_char,'=')) != NULL)
|
323 |
|
|
*value++ = 0;
|
324 |
|
|
|
325 |
|
|
#ifdef CONFIG_JOLIET
|
326 |
|
|
if (!strcmp(this_char,"iocharset") && value) {
|
327 |
|
|
popt->iocharset = value;
|
328 |
|
|
while (*value && *value != ',')
|
329 |
|
|
value++;
|
330 |
|
|
if (value == popt->iocharset)
|
331 |
|
|
return 0;
|
332 |
|
|
*value = 0;
|
333 |
|
|
} else
|
334 |
|
|
#endif
|
335 |
|
|
if (!strcmp(this_char,"map") && value) {
|
336 |
|
|
if (value[0] && !value[1] && strchr("ano",*value))
|
337 |
|
|
popt->map = *value;
|
338 |
|
|
else if (!strcmp(value,"off")) popt->map = 'o';
|
339 |
|
|
else if (!strcmp(value,"normal")) popt->map = 'n';
|
340 |
|
|
else if (!strcmp(value,"acorn")) popt->map = 'a';
|
341 |
|
|
else return 0;
|
342 |
|
|
}
|
343 |
|
|
if (!strcmp(this_char,"session") && value) {
|
344 |
|
|
char * vpnt = value;
|
345 |
|
|
unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0);
|
346 |
|
|
if(ivalue < 0 || ivalue >99) return 0;
|
347 |
|
|
popt->session=ivalue+1;
|
348 |
|
|
}
|
349 |
|
|
if (!strcmp(this_char,"sbsector") && value) {
|
350 |
|
|
char * vpnt = value;
|
351 |
|
|
unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0);
|
352 |
|
|
if(ivalue < 0 || ivalue >660*512) return 0;
|
353 |
|
|
popt->sbsector=ivalue;
|
354 |
|
|
}
|
355 |
|
|
else if (!strcmp(this_char,"check") && value) {
|
356 |
|
|
if (value[0] && !value[1] && strchr("rs",*value))
|
357 |
|
|
popt->check = *value;
|
358 |
|
|
else if (!strcmp(value,"relaxed")) popt->check = 'r';
|
359 |
|
|
else if (!strcmp(value,"strict")) popt->check = 's';
|
360 |
|
|
else return 0;
|
361 |
|
|
}
|
362 |
|
|
else if (!strcmp(this_char,"conv") && value) {
|
363 |
|
|
/* no conversion is done anymore;
|
364 |
|
|
we still accept the same mount options,
|
365 |
|
|
but ignore them */
|
366 |
|
|
if (value[0] && !value[1] && strchr("btma",*value)) ;
|
367 |
|
|
else if (!strcmp(value,"binary")) ;
|
368 |
|
|
else if (!strcmp(value,"text")) ;
|
369 |
|
|
else if (!strcmp(value,"mtext")) ;
|
370 |
|
|
else if (!strcmp(value,"auto")) ;
|
371 |
|
|
else return 0;
|
372 |
|
|
}
|
373 |
|
|
else if (value &&
|
374 |
|
|
(!strcmp(this_char,"block") ||
|
375 |
|
|
!strcmp(this_char,"mode") ||
|
376 |
|
|
!strcmp(this_char,"uid") ||
|
377 |
|
|
!strcmp(this_char,"gid"))) {
|
378 |
|
|
char * vpnt = value;
|
379 |
|
|
unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0);
|
380 |
|
|
if (*vpnt) return 0;
|
381 |
|
|
switch(*this_char) {
|
382 |
|
|
case 'b':
|
383 |
|
|
if ( ivalue != 512
|
384 |
|
|
&& ivalue != 1024
|
385 |
|
|
&& ivalue != 2048) return 0;
|
386 |
|
|
popt->blocksize = ivalue;
|
387 |
|
|
break;
|
388 |
|
|
case 'u':
|
389 |
|
|
popt->uid = ivalue;
|
390 |
|
|
break;
|
391 |
|
|
case 'g':
|
392 |
|
|
popt->gid = ivalue;
|
393 |
|
|
break;
|
394 |
|
|
case 'm':
|
395 |
|
|
popt->mode = ivalue;
|
396 |
|
|
break;
|
397 |
|
|
}
|
398 |
|
|
}
|
399 |
|
|
else return 1;
|
400 |
|
|
}
|
401 |
|
|
return 1;
|
402 |
|
|
}
|
403 |
|
|
|
404 |
|
|
/*
|
405 |
|
|
* look if the driver can tell the multi session redirection value
|
406 |
|
|
*
|
407 |
|
|
* don't change this if you don't know what you do, please!
|
408 |
|
|
* Multisession is legal only with XA disks.
|
409 |
|
|
* A non-XA disk with more than one volume descriptor may do it right, but
|
410 |
|
|
* usually is written in a nowhere standardized "multi-partition" manner.
|
411 |
|
|
* Multisession uses absolute addressing (solely the first frame of the whole
|
412 |
|
|
* track is #0), multi-partition uses relative addressing (each first frame of
|
413 |
|
|
* each track is #0), and a track is not a session.
|
414 |
|
|
*
|
415 |
|
|
* A broken CDwriter software or drive firmware does not set new standards,
|
416 |
|
|
* at least not if conflicting with the existing ones.
|
417 |
|
|
*
|
418 |
|
|
* emoenke@gwdg.de
|
419 |
|
|
*/
|
420 |
|
|
#define WE_OBEY_THE_WRITTEN_STANDARDS 1
|
421 |
|
|
|
422 |
|
|
static unsigned int isofs_get_last_session(struct super_block *sb,s32 session )
|
423 |
|
|
{
|
424 |
|
|
struct cdrom_multisession ms_info;
|
425 |
|
|
unsigned int vol_desc_start;
|
426 |
|
|
struct block_device *bdev = sb->s_bdev;
|
427 |
|
|
int i;
|
428 |
|
|
|
429 |
|
|
vol_desc_start=0;
|
430 |
|
|
ms_info.addr_format=CDROM_LBA;
|
431 |
|
|
if(session >= 0 && session <= 99) {
|
432 |
|
|
struct cdrom_tocentry Te;
|
433 |
|
|
Te.cdte_track=session;
|
434 |
|
|
Te.cdte_format=CDROM_LBA;
|
435 |
|
|
i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
|
436 |
|
|
if (!i) {
|
437 |
|
|
printk(KERN_DEBUG "Session %d start %d type %d\n",
|
438 |
|
|
session, Te.cdte_addr.lba,
|
439 |
|
|
Te.cdte_ctrl&CDROM_DATA_TRACK);
|
440 |
|
|
if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
|
441 |
|
|
return Te.cdte_addr.lba;
|
442 |
|
|
}
|
443 |
|
|
|
444 |
|
|
printk(KERN_ERR "Invalid session number or type of track\n");
|
445 |
|
|
}
|
446 |
|
|
i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
|
447 |
|
|
if(session > 0) printk(KERN_ERR "Invalid session number\n");
|
448 |
|
|
#if 0
|
449 |
|
|
printk("isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
|
450 |
|
|
if (i==0) {
|
451 |
|
|
printk("isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
|
452 |
|
|
printk("isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
|
453 |
|
|
}
|
454 |
|
|
#endif
|
455 |
|
|
if (i==0)
|
456 |
|
|
#if WE_OBEY_THE_WRITTEN_STANDARDS
|
457 |
|
|
if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
|
458 |
|
|
#endif
|
459 |
|
|
vol_desc_start=ms_info.addr.lba;
|
460 |
|
|
return vol_desc_start;
|
461 |
|
|
}
|
462 |
|
|
|
463 |
|
|
/*
|
464 |
|
|
* Initialize the superblock and read the root inode.
|
465 |
|
|
*
|
466 |
|
|
* Note: a check_disk_change() has been done immediately prior
|
467 |
|
|
* to this call, so we don't need to check again.
|
468 |
|
|
*/
|
469 |
|
|
static struct super_block *isofs_read_super(struct super_block *s, void *data,
|
470 |
|
|
int silent)
|
471 |
|
|
{
|
472 |
|
|
kdev_t dev = s->s_dev;
|
473 |
|
|
struct buffer_head * bh = NULL, *pri_bh = NULL;
|
474 |
|
|
struct hs_primary_descriptor * h_pri = NULL;
|
475 |
|
|
struct iso_primary_descriptor * pri = NULL;
|
476 |
|
|
struct iso_supplementary_descriptor *sec = NULL;
|
477 |
|
|
struct iso_directory_record * rootp;
|
478 |
|
|
int joliet_level = 0;
|
479 |
|
|
int high_sierra;
|
480 |
|
|
int iso_blknum, block;
|
481 |
|
|
int orig_zonesize;
|
482 |
|
|
int table;
|
483 |
|
|
unsigned int blocksize, blocksize_bits;
|
484 |
|
|
unsigned int vol_desc_start;
|
485 |
|
|
unsigned long first_data_zone;
|
486 |
|
|
struct inode * inode;
|
487 |
|
|
struct iso9660_options opt;
|
488 |
|
|
|
489 |
|
|
if (!parse_options((char *) data, &opt))
|
490 |
|
|
goto out_unlock;
|
491 |
|
|
|
492 |
|
|
#if 0
|
493 |
|
|
printk("map = %c\n", opt.map);
|
494 |
|
|
printk("rock = %c\n", opt.rock);
|
495 |
|
|
printk("joliet = %c\n", opt.joliet);
|
496 |
|
|
printk("check = %c\n", opt.check);
|
497 |
|
|
printk("cruft = %c\n", opt.cruft);
|
498 |
|
|
printk("unhide = %c\n", opt.unhide);
|
499 |
|
|
printk("blocksize = %d\n", opt.blocksize);
|
500 |
|
|
printk("gid = %d\n", opt.gid);
|
501 |
|
|
printk("uid = %d\n", opt.uid);
|
502 |
|
|
printk("iocharset = %s\n", opt.iocharset);
|
503 |
|
|
#endif
|
504 |
|
|
|
505 |
|
|
/*
|
506 |
|
|
* First of all, get the hardware blocksize for this device.
|
507 |
|
|
* If we don't know what it is, or the hardware blocksize is
|
508 |
|
|
* larger than the blocksize the user specified, then use
|
509 |
|
|
* that value.
|
510 |
|
|
*/
|
511 |
|
|
blocksize = get_hardsect_size(dev);
|
512 |
|
|
if(blocksize > opt.blocksize) {
|
513 |
|
|
/*
|
514 |
|
|
* Force the blocksize we are going to use to be the
|
515 |
|
|
* hardware blocksize.
|
516 |
|
|
*/
|
517 |
|
|
opt.blocksize = blocksize;
|
518 |
|
|
}
|
519 |
|
|
|
520 |
|
|
blocksize_bits = 0;
|
521 |
|
|
{
|
522 |
|
|
int i = opt.blocksize;
|
523 |
|
|
while (i != 1){
|
524 |
|
|
blocksize_bits++;
|
525 |
|
|
i >>=1;
|
526 |
|
|
}
|
527 |
|
|
}
|
528 |
|
|
|
529 |
|
|
set_blocksize(dev, opt.blocksize);
|
530 |
|
|
s->s_blocksize = opt.blocksize;
|
531 |
|
|
|
532 |
|
|
s->u.isofs_sb.s_high_sierra = high_sierra = 0; /* default is iso9660 */
|
533 |
|
|
|
534 |
|
|
vol_desc_start = (opt.sbsector != -1) ?
|
535 |
|
|
opt.sbsector : isofs_get_last_session(s,opt.session);
|
536 |
|
|
|
537 |
|
|
for (iso_blknum = vol_desc_start+16;
|
538 |
|
|
iso_blknum < vol_desc_start+100; iso_blknum++)
|
539 |
|
|
{
|
540 |
|
|
struct hs_volume_descriptor * hdp;
|
541 |
|
|
struct iso_volume_descriptor * vdp;
|
542 |
|
|
|
543 |
|
|
block = iso_blknum << (ISOFS_BLOCK_BITS-blocksize_bits);
|
544 |
|
|
if (!(bh = sb_bread(s, block)))
|
545 |
|
|
goto out_no_read;
|
546 |
|
|
|
547 |
|
|
vdp = (struct iso_volume_descriptor *)bh->b_data;
|
548 |
|
|
hdp = (struct hs_volume_descriptor *)bh->b_data;
|
549 |
|
|
|
550 |
|
|
/* Due to the overlapping physical location of the descriptors,
|
551 |
|
|
* ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
|
552 |
|
|
* proper identification in this case, we first check for ISO.
|
553 |
|
|
*/
|
554 |
|
|
if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
|
555 |
|
|
if (isonum_711 (vdp->type) == ISO_VD_END)
|
556 |
|
|
break;
|
557 |
|
|
if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) {
|
558 |
|
|
if (pri == NULL) {
|
559 |
|
|
pri = (struct iso_primary_descriptor *)vdp;
|
560 |
|
|
/* Save the buffer in case we need it ... */
|
561 |
|
|
pri_bh = bh;
|
562 |
|
|
bh = NULL;
|
563 |
|
|
}
|
564 |
|
|
}
|
565 |
|
|
#ifdef CONFIG_JOLIET
|
566 |
|
|
else if (isonum_711 (vdp->type) == ISO_VD_SUPPLEMENTARY) {
|
567 |
|
|
sec = (struct iso_supplementary_descriptor *)vdp;
|
568 |
|
|
if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
|
569 |
|
|
if (opt.joliet == 'y') {
|
570 |
|
|
if (sec->escape[2] == 0x40) {
|
571 |
|
|
joliet_level = 1;
|
572 |
|
|
} else if (sec->escape[2] == 0x43) {
|
573 |
|
|
joliet_level = 2;
|
574 |
|
|
} else if (sec->escape[2] == 0x45) {
|
575 |
|
|
joliet_level = 3;
|
576 |
|
|
}
|
577 |
|
|
printk(KERN_DEBUG"ISO 9660 Extensions: Microsoft Joliet Level %d\n",
|
578 |
|
|
joliet_level);
|
579 |
|
|
}
|
580 |
|
|
goto root_found;
|
581 |
|
|
} else {
|
582 |
|
|
/* Unknown supplementary volume descriptor */
|
583 |
|
|
sec = NULL;
|
584 |
|
|
}
|
585 |
|
|
}
|
586 |
|
|
#endif
|
587 |
|
|
} else {
|
588 |
|
|
if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
|
589 |
|
|
if (isonum_711 (hdp->type) != ISO_VD_PRIMARY)
|
590 |
|
|
goto out_freebh;
|
591 |
|
|
|
592 |
|
|
s->u.isofs_sb.s_high_sierra = 1;
|
593 |
|
|
high_sierra = 1;
|
594 |
|
|
opt.rock = 'n';
|
595 |
|
|
h_pri = (struct hs_primary_descriptor *)vdp;
|
596 |
|
|
goto root_found;
|
597 |
|
|
}
|
598 |
|
|
}
|
599 |
|
|
|
600 |
|
|
/* Just skip any volume descriptors we don't recognize */
|
601 |
|
|
|
602 |
|
|
brelse(bh);
|
603 |
|
|
bh = NULL;
|
604 |
|
|
}
|
605 |
|
|
/*
|
606 |
|
|
* If we fall through, either no volume descriptor was found,
|
607 |
|
|
* or else we passed a primary descriptor looking for others.
|
608 |
|
|
*/
|
609 |
|
|
if (!pri)
|
610 |
|
|
goto out_unknown_format;
|
611 |
|
|
brelse(bh);
|
612 |
|
|
bh = pri_bh;
|
613 |
|
|
pri_bh = NULL;
|
614 |
|
|
|
615 |
|
|
root_found:
|
616 |
|
|
|
617 |
|
|
if (joliet_level && (pri == NULL || opt.rock == 'n')) {
|
618 |
|
|
/* This is the case of Joliet with the norock mount flag.
|
619 |
|
|
* A disc with both Joliet and Rock Ridge is handled later
|
620 |
|
|
*/
|
621 |
|
|
pri = (struct iso_primary_descriptor *) sec;
|
622 |
|
|
}
|
623 |
|
|
|
624 |
|
|
if(high_sierra){
|
625 |
|
|
rootp = (struct iso_directory_record *) h_pri->root_directory_record;
|
626 |
|
|
#ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS
|
627 |
|
|
if (isonum_723 (h_pri->volume_set_size) != 1)
|
628 |
|
|
goto out_no_support;
|
629 |
|
|
#endif /* IGNORE_WRONG_MULTI_VOLUME_SPECS */
|
630 |
|
|
s->u.isofs_sb.s_nzones = isonum_733 (h_pri->volume_space_size);
|
631 |
|
|
s->u.isofs_sb.s_log_zone_size = isonum_723 (h_pri->logical_block_size);
|
632 |
|
|
s->u.isofs_sb.s_max_size = isonum_733(h_pri->volume_space_size);
|
633 |
|
|
} else {
|
634 |
|
|
rootp = (struct iso_directory_record *) pri->root_directory_record;
|
635 |
|
|
#ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS
|
636 |
|
|
if (isonum_723 (pri->volume_set_size) != 1)
|
637 |
|
|
goto out_no_support;
|
638 |
|
|
#endif /* IGNORE_WRONG_MULTI_VOLUME_SPECS */
|
639 |
|
|
s->u.isofs_sb.s_nzones = isonum_733 (pri->volume_space_size);
|
640 |
|
|
s->u.isofs_sb.s_log_zone_size = isonum_723 (pri->logical_block_size);
|
641 |
|
|
s->u.isofs_sb.s_max_size = isonum_733(pri->volume_space_size);
|
642 |
|
|
}
|
643 |
|
|
|
644 |
|
|
s->u.isofs_sb.s_ninodes = 0; /* No way to figure this out easily */
|
645 |
|
|
|
646 |
|
|
orig_zonesize = s -> u.isofs_sb.s_log_zone_size;
|
647 |
|
|
/*
|
648 |
|
|
* If the zone size is smaller than the hardware sector size,
|
649 |
|
|
* this is a fatal error. This would occur if the disc drive
|
650 |
|
|
* had sectors that were 2048 bytes, but the filesystem had
|
651 |
|
|
* blocks that were 512 bytes (which should only very rarely
|
652 |
|
|
* happen.)
|
653 |
|
|
*/
|
654 |
|
|
if(blocksize != 0 && orig_zonesize < blocksize)
|
655 |
|
|
goto out_bad_size;
|
656 |
|
|
|
657 |
|
|
/* RDE: convert log zone size to bit shift */
|
658 |
|
|
switch (s -> u.isofs_sb.s_log_zone_size)
|
659 |
|
|
{ case 512: s -> u.isofs_sb.s_log_zone_size = 9; break;
|
660 |
|
|
case 1024: s -> u.isofs_sb.s_log_zone_size = 10; break;
|
661 |
|
|
case 2048: s -> u.isofs_sb.s_log_zone_size = 11; break;
|
662 |
|
|
|
663 |
|
|
default:
|
664 |
|
|
goto out_bad_zone_size;
|
665 |
|
|
}
|
666 |
|
|
|
667 |
|
|
s->s_magic = ISOFS_SUPER_MAGIC;
|
668 |
|
|
|
669 |
|
|
/* The CDROM is read-only, has no nodes (devices) on it, and since
|
670 |
|
|
all of the files appear to be owned by root, we really do not want
|
671 |
|
|
to allow suid. (suid or devices will not show up unless we have
|
672 |
|
|
Rock Ridge extensions) */
|
673 |
|
|
|
674 |
|
|
s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */;
|
675 |
|
|
|
676 |
|
|
/* Set this for reference. Its not currently used except on write
|
677 |
|
|
which we don't have .. */
|
678 |
|
|
|
679 |
|
|
/* RDE: data zone now byte offset! */
|
680 |
|
|
|
681 |
|
|
first_data_zone = ((isonum_733 (rootp->extent) +
|
682 |
|
|
isonum_711 (rootp->ext_attr_length))
|
683 |
|
|
<< s -> u.isofs_sb.s_log_zone_size);
|
684 |
|
|
s->u.isofs_sb.s_firstdatazone = first_data_zone;
|
685 |
|
|
#ifndef BEQUIET
|
686 |
|
|
printk(KERN_DEBUG "Max size:%ld Log zone size:%ld\n",
|
687 |
|
|
s->u.isofs_sb.s_max_size,
|
688 |
|
|
1UL << s->u.isofs_sb.s_log_zone_size);
|
689 |
|
|
printk(KERN_DEBUG "First datazone:%ld Root inode number:%ld\n",
|
690 |
|
|
s->u.isofs_sb.s_firstdatazone >> s -> u.isofs_sb.s_log_zone_size,
|
691 |
|
|
s->u.isofs_sb.s_firstdatazone);
|
692 |
|
|
if(high_sierra)
|
693 |
|
|
printk(KERN_DEBUG "Disc in High Sierra format.\n");
|
694 |
|
|
#endif
|
695 |
|
|
|
696 |
|
|
/*
|
697 |
|
|
* If the Joliet level is set, we _may_ decide to use the
|
698 |
|
|
* secondary descriptor, but can't be sure until after we
|
699 |
|
|
* read the root inode. But before reading the root inode
|
700 |
|
|
* we may need to change the device blocksize, and would
|
701 |
|
|
* rather release the old buffer first. So, we cache the
|
702 |
|
|
* first_data_zone value from the secondary descriptor.
|
703 |
|
|
*/
|
704 |
|
|
if (joliet_level) {
|
705 |
|
|
pri = (struct iso_primary_descriptor *) sec;
|
706 |
|
|
rootp = (struct iso_directory_record *)
|
707 |
|
|
pri->root_directory_record;
|
708 |
|
|
first_data_zone = ((isonum_733 (rootp->extent) +
|
709 |
|
|
isonum_711 (rootp->ext_attr_length))
|
710 |
|
|
<< s -> u.isofs_sb.s_log_zone_size);
|
711 |
|
|
}
|
712 |
|
|
|
713 |
|
|
/*
|
714 |
|
|
* We're all done using the volume descriptor, and may need
|
715 |
|
|
* to change the device blocksize, so release the buffer now.
|
716 |
|
|
*/
|
717 |
|
|
brelse(pri_bh);
|
718 |
|
|
brelse(bh);
|
719 |
|
|
|
720 |
|
|
/*
|
721 |
|
|
* Force the blocksize to 512 for 512 byte sectors. The file
|
722 |
|
|
* read primitives really get it wrong in a bad way if we don't
|
723 |
|
|
* do this.
|
724 |
|
|
*
|
725 |
|
|
* Note - we should never be setting the blocksize to something
|
726 |
|
|
* less than the hardware sector size for the device. If we
|
727 |
|
|
* do, we would end up having to read larger buffers and split
|
728 |
|
|
* out portions to satisfy requests.
|
729 |
|
|
*
|
730 |
|
|
* Note2- the idea here is that we want to deal with the optimal
|
731 |
|
|
* zonesize in the filesystem. If we have it set to something less,
|
732 |
|
|
* then we have horrible problems with trying to piece together
|
733 |
|
|
* bits of adjacent blocks in order to properly read directory
|
734 |
|
|
* entries. By forcing the blocksize in this way, we ensure
|
735 |
|
|
* that we will never be required to do this.
|
736 |
|
|
*/
|
737 |
|
|
if ( orig_zonesize != opt.blocksize ) {
|
738 |
|
|
set_blocksize(dev, orig_zonesize);
|
739 |
|
|
#ifndef BEQUIET
|
740 |
|
|
printk(KERN_DEBUG
|
741 |
|
|
"ISOFS: Forcing new log zone size:%d\n", orig_zonesize);
|
742 |
|
|
#endif
|
743 |
|
|
}
|
744 |
|
|
s->s_blocksize = orig_zonesize;
|
745 |
|
|
s->s_blocksize_bits = s -> u.isofs_sb.s_log_zone_size;
|
746 |
|
|
|
747 |
|
|
s->u.isofs_sb.s_nls_iocharset = NULL;
|
748 |
|
|
|
749 |
|
|
#ifdef CONFIG_JOLIET
|
750 |
|
|
if (joliet_level && opt.utf8 == 0) {
|
751 |
|
|
char * p = opt.iocharset ? opt.iocharset : "iso8859-1";
|
752 |
|
|
s->u.isofs_sb.s_nls_iocharset = load_nls(p);
|
753 |
|
|
if (! s->u.isofs_sb.s_nls_iocharset) {
|
754 |
|
|
/* Fail only if explicit charset specified */
|
755 |
|
|
if (opt.iocharset)
|
756 |
|
|
goto out_unlock;
|
757 |
|
|
s->u.isofs_sb.s_nls_iocharset = load_nls_default();
|
758 |
|
|
}
|
759 |
|
|
}
|
760 |
|
|
#endif
|
761 |
|
|
s->s_op = &isofs_sops;
|
762 |
|
|
s->u.isofs_sb.s_mapping = opt.map;
|
763 |
|
|
s->u.isofs_sb.s_rock = (opt.rock == 'y' ? 2 : 0);
|
764 |
|
|
s->u.isofs_sb.s_rock_offset = -1; /* initial offset, will guess until SP is found*/
|
765 |
|
|
s->u.isofs_sb.s_cruft = opt.cruft;
|
766 |
|
|
s->u.isofs_sb.s_unhide = opt.unhide;
|
767 |
|
|
s->u.isofs_sb.s_uid = opt.uid;
|
768 |
|
|
s->u.isofs_sb.s_gid = opt.gid;
|
769 |
|
|
s->u.isofs_sb.s_utf8 = opt.utf8;
|
770 |
|
|
s->u.isofs_sb.s_nocompress = opt.nocompress;
|
771 |
|
|
/*
|
772 |
|
|
* It would be incredibly stupid to allow people to mark every file
|
773 |
|
|
* on the disk as suid, so we merely allow them to set the default
|
774 |
|
|
* permissions.
|
775 |
|
|
*/
|
776 |
|
|
s->u.isofs_sb.s_mode = opt.mode & 0777;
|
777 |
|
|
|
778 |
|
|
/*
|
779 |
|
|
* Read the root inode, which _may_ result in changing
|
780 |
|
|
* the s_rock flag. Once we have the final s_rock value,
|
781 |
|
|
* we then decide whether to use the Joliet descriptor.
|
782 |
|
|
*/
|
783 |
|
|
inode = iget(s, s->u.isofs_sb.s_firstdatazone);
|
784 |
|
|
|
785 |
|
|
/*
|
786 |
|
|
* If this disk has both Rock Ridge and Joliet on it, then we
|
787 |
|
|
* want to use Rock Ridge by default. This can be overridden
|
788 |
|
|
* by using the norock mount option. There is still one other
|
789 |
|
|
* possibility that is not taken into account: a Rock Ridge
|
790 |
|
|
* CD with Unicode names. Until someone sees such a beast, it
|
791 |
|
|
* will not be supported.
|
792 |
|
|
*/
|
793 |
|
|
if (s->u.isofs_sb.s_rock == 1) {
|
794 |
|
|
joliet_level = 0;
|
795 |
|
|
} else if (joliet_level) {
|
796 |
|
|
s->u.isofs_sb.s_rock = 0;
|
797 |
|
|
if (s->u.isofs_sb.s_firstdatazone != first_data_zone) {
|
798 |
|
|
s->u.isofs_sb.s_firstdatazone = first_data_zone;
|
799 |
|
|
printk(KERN_DEBUG
|
800 |
|
|
"ISOFS: changing to secondary root\n");
|
801 |
|
|
iput(inode);
|
802 |
|
|
inode = iget(s, s->u.isofs_sb.s_firstdatazone);
|
803 |
|
|
}
|
804 |
|
|
}
|
805 |
|
|
|
806 |
|
|
if (opt.check == 'u') {
|
807 |
|
|
/* Only Joliet is case insensitive by default */
|
808 |
|
|
if (joliet_level) opt.check = 'r';
|
809 |
|
|
else opt.check = 's';
|
810 |
|
|
}
|
811 |
|
|
s->u.isofs_sb.s_joliet_level = joliet_level;
|
812 |
|
|
|
813 |
|
|
/* check the root inode */
|
814 |
|
|
if (!inode)
|
815 |
|
|
goto out_no_root;
|
816 |
|
|
if (!inode->i_op)
|
817 |
|
|
goto out_bad_root;
|
818 |
|
|
/* get the root dentry */
|
819 |
|
|
s->s_root = d_alloc_root(inode);
|
820 |
|
|
if (!(s->s_root))
|
821 |
|
|
goto out_no_root;
|
822 |
|
|
|
823 |
|
|
table = 0;
|
824 |
|
|
if (joliet_level) table += 2;
|
825 |
|
|
if (opt.check == 'r') table++;
|
826 |
|
|
s->s_root->d_op = &isofs_dentry_ops[table];
|
827 |
|
|
|
828 |
|
|
return s;
|
829 |
|
|
|
830 |
|
|
/*
|
831 |
|
|
* Display error messages and free resources.
|
832 |
|
|
*/
|
833 |
|
|
out_bad_root:
|
834 |
|
|
printk(KERN_WARNING "isofs_read_super: root inode not initialized\n");
|
835 |
|
|
goto out_iput;
|
836 |
|
|
out_no_root:
|
837 |
|
|
printk(KERN_WARNING "isofs_read_super: get root inode failed\n");
|
838 |
|
|
out_iput:
|
839 |
|
|
iput(inode);
|
840 |
|
|
#ifdef CONFIG_JOLIET
|
841 |
|
|
if (s->u.isofs_sb.s_nls_iocharset)
|
842 |
|
|
unload_nls(s->u.isofs_sb.s_nls_iocharset);
|
843 |
|
|
#endif
|
844 |
|
|
goto out_unlock;
|
845 |
|
|
out_no_read:
|
846 |
|
|
printk(KERN_WARNING "isofs_read_super: "
|
847 |
|
|
"bread failed, dev=%s, iso_blknum=%d, block=%d\n",
|
848 |
|
|
kdevname(dev), iso_blknum, block);
|
849 |
|
|
goto out_unlock;
|
850 |
|
|
out_bad_zone_size:
|
851 |
|
|
printk(KERN_WARNING "Bad logical zone size %ld\n",
|
852 |
|
|
s->u.isofs_sb.s_log_zone_size);
|
853 |
|
|
goto out_freebh;
|
854 |
|
|
out_bad_size:
|
855 |
|
|
printk(KERN_WARNING "Logical zone size(%d) < hardware blocksize(%u)\n",
|
856 |
|
|
orig_zonesize, blocksize);
|
857 |
|
|
goto out_freebh;
|
858 |
|
|
#ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS
|
859 |
|
|
out_no_support:
|
860 |
|
|
printk(KERN_WARNING "Multi-volume disks not supported.\n");
|
861 |
|
|
goto out_freebh;
|
862 |
|
|
#endif
|
863 |
|
|
out_unknown_format:
|
864 |
|
|
if (!silent)
|
865 |
|
|
printk(KERN_WARNING "Unable to identify CD-ROM format.\n");
|
866 |
|
|
|
867 |
|
|
out_freebh:
|
868 |
|
|
brelse(bh);
|
869 |
|
|
out_unlock:
|
870 |
|
|
return NULL;
|
871 |
|
|
}
|
872 |
|
|
|
873 |
|
|
static int isofs_statfs (struct super_block *sb, struct statfs *buf)
|
874 |
|
|
{
|
875 |
|
|
buf->f_type = ISOFS_SUPER_MAGIC;
|
876 |
|
|
buf->f_bsize = sb->s_blocksize;
|
877 |
|
|
buf->f_blocks = (sb->u.isofs_sb.s_nzones
|
878 |
|
|
<< (sb->u.isofs_sb.s_log_zone_size - sb->s_blocksize_bits));
|
879 |
|
|
buf->f_bfree = 0;
|
880 |
|
|
buf->f_bavail = 0;
|
881 |
|
|
buf->f_files = sb->u.isofs_sb.s_ninodes;
|
882 |
|
|
buf->f_ffree = 0;
|
883 |
|
|
buf->f_namelen = NAME_MAX;
|
884 |
|
|
return 0;
|
885 |
|
|
}
|
886 |
|
|
|
887 |
|
|
/*
|
888 |
|
|
* Get a set of blocks; filling in buffer_heads if already allocated
|
889 |
|
|
* or getblk() if they are not. Returns the number of blocks inserted
|
890 |
|
|
* (0 == error.)
|
891 |
|
|
*/
|
892 |
|
|
int isofs_get_blocks(struct inode *inode, long iblock,
|
893 |
|
|
struct buffer_head **bh_result, unsigned long nblocks)
|
894 |
|
|
{
|
895 |
|
|
unsigned long b_off;
|
896 |
|
|
unsigned offset, sect_size;
|
897 |
|
|
unsigned int firstext;
|
898 |
|
|
unsigned long nextino;
|
899 |
|
|
int section, rv;
|
900 |
|
|
|
901 |
|
|
lock_kernel();
|
902 |
|
|
|
903 |
|
|
rv = 0;
|
904 |
|
|
if (iblock < 0) {
|
905 |
|
|
printk("isofs_get_blocks: block < 0\n");
|
906 |
|
|
goto abort;
|
907 |
|
|
}
|
908 |
|
|
|
909 |
|
|
b_off = iblock;
|
910 |
|
|
|
911 |
|
|
offset = 0;
|
912 |
|
|
firstext = inode->u.isofs_i.i_first_extent;
|
913 |
|
|
sect_size = inode->u.isofs_i.i_section_size >> ISOFS_BUFFER_BITS(inode);
|
914 |
|
|
nextino = inode->u.isofs_i.i_next_section_ino;
|
915 |
|
|
section = 0;
|
916 |
|
|
|
917 |
|
|
while ( nblocks ) {
|
918 |
|
|
/* If we are *way* beyond the end of the file, print a message.
|
919 |
|
|
* Access beyond the end of the file up to the next page boundary
|
920 |
|
|
* is normal, however because of the way the page cache works.
|
921 |
|
|
* In this case, we just return 0 so that we can properly fill
|
922 |
|
|
* the page with useless information without generating any
|
923 |
|
|
* I/O errors.
|
924 |
|
|
*/
|
925 |
|
|
if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
|
926 |
|
|
printk("isofs_get_blocks: block >= EOF (%ld, %ld)\n",
|
927 |
|
|
iblock, (unsigned long) inode->i_size);
|
928 |
|
|
goto abort;
|
929 |
|
|
}
|
930 |
|
|
|
931 |
|
|
if (nextino) {
|
932 |
|
|
while (b_off >= (offset + sect_size)) {
|
933 |
|
|
struct inode *ninode;
|
934 |
|
|
|
935 |
|
|
offset += sect_size;
|
936 |
|
|
if (nextino == 0)
|
937 |
|
|
goto abort;
|
938 |
|
|
ninode = iget(inode->i_sb, nextino);
|
939 |
|
|
if (!ninode)
|
940 |
|
|
goto abort;
|
941 |
|
|
firstext = ninode->u.isofs_i.i_first_extent;
|
942 |
|
|
sect_size = ninode->u.isofs_i.i_section_size;
|
943 |
|
|
nextino = ninode->u.isofs_i.i_next_section_ino;
|
944 |
|
|
iput(ninode);
|
945 |
|
|
|
946 |
|
|
if (++section > 100) {
|
947 |
|
|
printk("isofs_get_blocks: More than 100 file sections ?!?, aborting...\n");
|
948 |
|
|
printk("isofs_get_blocks: ino=%lu block=%ld firstext=%u sect_size=%u nextino=%lu\n",
|
949 |
|
|
inode->i_ino, iblock, firstext, (unsigned) sect_size, nextino);
|
950 |
|
|
goto abort;
|
951 |
|
|
}
|
952 |
|
|
}
|
953 |
|
|
}
|
954 |
|
|
|
955 |
|
|
if ( *bh_result ) {
|
956 |
|
|
(*bh_result)->b_dev = inode->i_dev;
|
957 |
|
|
(*bh_result)->b_blocknr = firstext + b_off - offset;
|
958 |
|
|
(*bh_result)->b_state |= (1UL << BH_Mapped);
|
959 |
|
|
} else {
|
960 |
|
|
*bh_result = sb_getblk(inode->i_sb, firstext+b_off-offset);
|
961 |
|
|
if ( !*bh_result )
|
962 |
|
|
goto abort;
|
963 |
|
|
}
|
964 |
|
|
bh_result++; /* Next buffer head */
|
965 |
|
|
b_off++; /* Next buffer offset */
|
966 |
|
|
nblocks--;
|
967 |
|
|
rv++;
|
968 |
|
|
}
|
969 |
|
|
|
970 |
|
|
|
971 |
|
|
abort:
|
972 |
|
|
unlock_kernel();
|
973 |
|
|
return rv;
|
974 |
|
|
}
|
975 |
|
|
|
976 |
|
|
/*
|
977 |
|
|
* Used by the standard interfaces.
|
978 |
|
|
*/
|
979 |
|
|
static int isofs_get_block(struct inode *inode, long iblock,
|
980 |
|
|
struct buffer_head *bh_result, int create)
|
981 |
|
|
{
|
982 |
|
|
if ( create ) {
|
983 |
|
|
printk("isofs_get_block: Kernel tries to allocate a block\n");
|
984 |
|
|
return -EROFS;
|
985 |
|
|
}
|
986 |
|
|
|
987 |
|
|
return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO;
|
988 |
|
|
}
|
989 |
|
|
|
990 |
|
|
static int isofs_bmap(struct inode *inode, int block)
|
991 |
|
|
{
|
992 |
|
|
struct buffer_head dummy;
|
993 |
|
|
int error;
|
994 |
|
|
|
995 |
|
|
dummy.b_state = 0;
|
996 |
|
|
dummy.b_blocknr = -1000;
|
997 |
|
|
error = isofs_get_block(inode, block, &dummy, 0);
|
998 |
|
|
if (!error)
|
999 |
|
|
return dummy.b_blocknr;
|
1000 |
|
|
return 0;
|
1001 |
|
|
}
|
1002 |
|
|
|
1003 |
|
|
struct buffer_head *isofs_bread(struct inode *inode, unsigned int block)
|
1004 |
|
|
{
|
1005 |
|
|
unsigned int blknr = isofs_bmap(inode, block);
|
1006 |
|
|
if (!blknr)
|
1007 |
|
|
return NULL;
|
1008 |
|
|
return sb_bread(inode->i_sb, blknr);
|
1009 |
|
|
}
|
1010 |
|
|
|
1011 |
|
|
static int isofs_readpage(struct file *file, struct page *page)
|
1012 |
|
|
{
|
1013 |
|
|
return block_read_full_page(page,isofs_get_block);
|
1014 |
|
|
}
|
1015 |
|
|
|
1016 |
|
|
static int _isofs_bmap(struct address_space *mapping, long block)
|
1017 |
|
|
{
|
1018 |
|
|
return generic_block_bmap(mapping,block,isofs_get_block);
|
1019 |
|
|
}
|
1020 |
|
|
|
1021 |
|
|
static struct address_space_operations isofs_aops = {
|
1022 |
|
|
readpage: isofs_readpage,
|
1023 |
|
|
sync_page: block_sync_page,
|
1024 |
|
|
bmap: _isofs_bmap
|
1025 |
|
|
};
|
1026 |
|
|
|
1027 |
|
|
static inline void test_and_set_uid(uid_t *p, uid_t value)
|
1028 |
|
|
{
|
1029 |
|
|
if(value) {
|
1030 |
|
|
*p = value;
|
1031 |
|
|
}
|
1032 |
|
|
}
|
1033 |
|
|
|
1034 |
|
|
static inline void test_and_set_gid(gid_t *p, gid_t value)
|
1035 |
|
|
{
|
1036 |
|
|
if(value) {
|
1037 |
|
|
*p = value;
|
1038 |
|
|
}
|
1039 |
|
|
}
|
1040 |
|
|
|
1041 |
|
|
static int isofs_read_level3_size(struct inode * inode)
|
1042 |
|
|
{
|
1043 |
|
|
unsigned long f_pos = inode->i_ino;
|
1044 |
|
|
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
|
1045 |
|
|
int high_sierra = inode->i_sb->u.isofs_sb.s_high_sierra;
|
1046 |
|
|
struct buffer_head * bh = NULL;
|
1047 |
|
|
unsigned long block, offset;
|
1048 |
|
|
int i = 0;
|
1049 |
|
|
int more_entries = 0;
|
1050 |
|
|
struct iso_directory_record * tmpde = NULL;
|
1051 |
|
|
|
1052 |
|
|
inode->i_size = 0;
|
1053 |
|
|
inode->u.isofs_i.i_next_section_ino = 0;
|
1054 |
|
|
|
1055 |
|
|
block = f_pos >> ISOFS_BUFFER_BITS(inode);
|
1056 |
|
|
offset = f_pos & (bufsize-1);
|
1057 |
|
|
|
1058 |
|
|
do {
|
1059 |
|
|
struct iso_directory_record * de;
|
1060 |
|
|
unsigned int de_len;
|
1061 |
|
|
|
1062 |
|
|
if (!bh) {
|
1063 |
|
|
bh = sb_bread(inode->i_sb, block);
|
1064 |
|
|
if (!bh)
|
1065 |
|
|
goto out_noread;
|
1066 |
|
|
}
|
1067 |
|
|
de = (struct iso_directory_record *) (bh->b_data + offset);
|
1068 |
|
|
de_len = *(unsigned char *) de;
|
1069 |
|
|
|
1070 |
|
|
if (de_len == 0) {
|
1071 |
|
|
brelse(bh);
|
1072 |
|
|
bh = NULL;
|
1073 |
|
|
f_pos = (f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1);
|
1074 |
|
|
block = f_pos >> ISOFS_BUFFER_BITS(inode);
|
1075 |
|
|
offset = 0;
|
1076 |
|
|
continue;
|
1077 |
|
|
}
|
1078 |
|
|
|
1079 |
|
|
offset += de_len;
|
1080 |
|
|
|
1081 |
|
|
/* Make sure we have a full directory entry */
|
1082 |
|
|
if (offset >= bufsize) {
|
1083 |
|
|
int slop = bufsize - offset + de_len;
|
1084 |
|
|
if (!tmpde) {
|
1085 |
|
|
tmpde = kmalloc(256, GFP_KERNEL);
|
1086 |
|
|
if (!tmpde)
|
1087 |
|
|
goto out_nomem;
|
1088 |
|
|
}
|
1089 |
|
|
memcpy(tmpde, de, slop);
|
1090 |
|
|
offset &= bufsize - 1;
|
1091 |
|
|
block++;
|
1092 |
|
|
brelse(bh);
|
1093 |
|
|
bh = NULL;
|
1094 |
|
|
if (offset) {
|
1095 |
|
|
bh = sb_bread(inode->i_sb, block);
|
1096 |
|
|
if (!bh)
|
1097 |
|
|
goto out_noread;
|
1098 |
|
|
memcpy((void *) tmpde + slop, bh->b_data, offset);
|
1099 |
|
|
}
|
1100 |
|
|
de = tmpde;
|
1101 |
|
|
}
|
1102 |
|
|
|
1103 |
|
|
inode->i_size += isonum_733(de->size);
|
1104 |
|
|
if (i == 1)
|
1105 |
|
|
inode->u.isofs_i.i_next_section_ino = f_pos;
|
1106 |
|
|
|
1107 |
|
|
more_entries = de->flags[-high_sierra] & 0x80;
|
1108 |
|
|
|
1109 |
|
|
f_pos += de_len;
|
1110 |
|
|
i++;
|
1111 |
|
|
if(i > 100)
|
1112 |
|
|
goto out_toomany;
|
1113 |
|
|
} while(more_entries);
|
1114 |
|
|
out:
|
1115 |
|
|
if (tmpde)
|
1116 |
|
|
kfree(tmpde);
|
1117 |
|
|
if (bh)
|
1118 |
|
|
brelse(bh);
|
1119 |
|
|
return 0;
|
1120 |
|
|
|
1121 |
|
|
out_nomem:
|
1122 |
|
|
if (bh)
|
1123 |
|
|
brelse(bh);
|
1124 |
|
|
return -ENOMEM;
|
1125 |
|
|
|
1126 |
|
|
out_noread:
|
1127 |
|
|
printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
|
1128 |
|
|
if (tmpde)
|
1129 |
|
|
kfree(tmpde);
|
1130 |
|
|
return -EIO;
|
1131 |
|
|
|
1132 |
|
|
out_toomany:
|
1133 |
|
|
printk(KERN_INFO "isofs_read_level3_size: "
|
1134 |
|
|
"More than 100 file sections ?!?, aborting...\n"
|
1135 |
|
|
"isofs_read_level3_size: inode=%lu ino=%lu\n",
|
1136 |
|
|
inode->i_ino, f_pos);
|
1137 |
|
|
goto out;
|
1138 |
|
|
}
|
1139 |
|
|
|
1140 |
|
|
static void isofs_read_inode(struct inode * inode)
|
1141 |
|
|
{
|
1142 |
|
|
struct super_block *sb = inode->i_sb;
|
1143 |
|
|
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
|
1144 |
|
|
int block = inode->i_ino >> ISOFS_BUFFER_BITS(inode);
|
1145 |
|
|
int high_sierra = sb->u.isofs_sb.s_high_sierra;
|
1146 |
|
|
struct buffer_head * bh = NULL;
|
1147 |
|
|
struct iso_directory_record * de;
|
1148 |
|
|
struct iso_directory_record * tmpde = NULL;
|
1149 |
|
|
unsigned int de_len;
|
1150 |
|
|
unsigned long offset;
|
1151 |
|
|
int volume_seq_no, i;
|
1152 |
|
|
|
1153 |
|
|
bh = sb_bread(inode->i_sb, block);
|
1154 |
|
|
if (!bh)
|
1155 |
|
|
goto out_badread;
|
1156 |
|
|
|
1157 |
|
|
offset = (inode->i_ino & (bufsize - 1));
|
1158 |
|
|
de = (struct iso_directory_record *) (bh->b_data + offset);
|
1159 |
|
|
de_len = *(unsigned char *) de;
|
1160 |
|
|
|
1161 |
|
|
if (offset + de_len > bufsize) {
|
1162 |
|
|
int frag1 = bufsize - offset;
|
1163 |
|
|
|
1164 |
|
|
tmpde = kmalloc(de_len, GFP_KERNEL);
|
1165 |
|
|
if (tmpde == NULL) {
|
1166 |
|
|
printk(KERN_INFO "isofs_read_inode: out of memory\n");
|
1167 |
|
|
goto fail;
|
1168 |
|
|
}
|
1169 |
|
|
memcpy(tmpde, bh->b_data + offset, frag1);
|
1170 |
|
|
brelse(bh);
|
1171 |
|
|
bh = sb_bread(inode->i_sb, ++block);
|
1172 |
|
|
if (!bh)
|
1173 |
|
|
goto out_badread;
|
1174 |
|
|
memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1);
|
1175 |
|
|
de = tmpde;
|
1176 |
|
|
}
|
1177 |
|
|
|
1178 |
|
|
/* Assume it is a normal-format file unless told otherwise */
|
1179 |
|
|
inode->u.isofs_i.i_file_format = isofs_file_normal;
|
1180 |
|
|
|
1181 |
|
|
if (de->flags[-high_sierra] & 2) {
|
1182 |
|
|
inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR;
|
1183 |
|
|
inode->i_nlink = 1; /* Set to 1. We know there are 2, but
|
1184 |
|
|
the find utility tries to optimize
|
1185 |
|
|
if it is 2, and it screws up. It is
|
1186 |
|
|
easier to give 1 which tells find to
|
1187 |
|
|
do it the hard way. */
|
1188 |
|
|
} else {
|
1189 |
|
|
/* Everybody gets to read the file. */
|
1190 |
|
|
inode->i_mode = inode->i_sb->u.isofs_sb.s_mode;
|
1191 |
|
|
inode->i_nlink = 1;
|
1192 |
|
|
inode->i_mode |= S_IFREG;
|
1193 |
|
|
/* If there are no periods in the name,
|
1194 |
|
|
* then set the execute permission bit
|
1195 |
|
|
*/
|
1196 |
|
|
for(i=0; i< de->name_len[0]; i++)
|
1197 |
|
|
if(de->name[i]=='.' || de->name[i]==';')
|
1198 |
|
|
break;
|
1199 |
|
|
if(i == de->name_len[0] || de->name[i] == ';')
|
1200 |
|
|
inode->i_mode |= S_IXUGO; /* execute permission */
|
1201 |
|
|
}
|
1202 |
|
|
inode->i_uid = inode->i_sb->u.isofs_sb.s_uid;
|
1203 |
|
|
inode->i_gid = inode->i_sb->u.isofs_sb.s_gid;
|
1204 |
|
|
inode->i_blocks = inode->i_blksize = 0;
|
1205 |
|
|
|
1206 |
|
|
|
1207 |
|
|
inode->u.isofs_i.i_section_size = isonum_733 (de->size);
|
1208 |
|
|
if(de->flags[-high_sierra] & 0x80) {
|
1209 |
|
|
if(isofs_read_level3_size(inode)) goto fail;
|
1210 |
|
|
} else {
|
1211 |
|
|
inode->i_size = isonum_733 (de->size);
|
1212 |
|
|
}
|
1213 |
|
|
|
1214 |
|
|
/*
|
1215 |
|
|
* The ISO-9660 filesystem only stores 32 bits for file size.
|
1216 |
|
|
* mkisofs handles files up to 2GB-2 = 2147483646 = 0x7FFFFFFE bytes
|
1217 |
|
|
* in size. This is according to the large file summit paper from 1996.
|
1218 |
|
|
* WARNING: ISO-9660 filesystems > 1 GB and even > 2 GB are fully
|
1219 |
|
|
* legal. Do not prevent to use DVD's schilling@fokus.gmd.de
|
1220 |
|
|
*/
|
1221 |
|
|
if ((inode->i_size < 0 || inode->i_size > 0x7FFFFFFE) &&
|
1222 |
|
|
inode->i_sb->u.isofs_sb.s_cruft == 'n') {
|
1223 |
|
|
printk(KERN_WARNING "Warning: defective CD-ROM. "
|
1224 |
|
|
"Enabling \"cruft\" mount option.\n");
|
1225 |
|
|
inode->i_sb->u.isofs_sb.s_cruft = 'y';
|
1226 |
|
|
}
|
1227 |
|
|
|
1228 |
|
|
/*
|
1229 |
|
|
* Some dipshit decided to store some other bit of information
|
1230 |
|
|
* in the high byte of the file length. Catch this and holler.
|
1231 |
|
|
* WARNING: this will make it impossible for a file to be > 16MB
|
1232 |
|
|
* on the CDROM.
|
1233 |
|
|
*/
|
1234 |
|
|
|
1235 |
|
|
if (inode->i_sb->u.isofs_sb.s_cruft == 'y' &&
|
1236 |
|
|
inode->i_size & 0xff000000) {
|
1237 |
|
|
inode->i_size &= 0x00ffffff;
|
1238 |
|
|
}
|
1239 |
|
|
|
1240 |
|
|
if (de->interleave[0]) {
|
1241 |
|
|
printk("Interleaved files not (yet) supported.\n");
|
1242 |
|
|
inode->i_size = 0;
|
1243 |
|
|
}
|
1244 |
|
|
|
1245 |
|
|
/* I have no idea what file_unit_size is used for, so
|
1246 |
|
|
we will flag it for now */
|
1247 |
|
|
if (de->file_unit_size[0] != 0) {
|
1248 |
|
|
printk("File unit size != 0 for ISO file (%ld).\n",
|
1249 |
|
|
inode->i_ino);
|
1250 |
|
|
}
|
1251 |
|
|
|
1252 |
|
|
/* I have no idea what other flag bits are used for, so
|
1253 |
|
|
we will flag it for now */
|
1254 |
|
|
#ifdef DEBUG
|
1255 |
|
|
if((de->flags[-high_sierra] & ~2)!= 0){
|
1256 |
|
|
printk("Unusual flag settings for ISO file (%ld %x).\n",
|
1257 |
|
|
inode->i_ino, de->flags[-high_sierra]);
|
1258 |
|
|
}
|
1259 |
|
|
#endif
|
1260 |
|
|
|
1261 |
|
|
inode->i_mtime = inode->i_atime = inode->i_ctime =
|
1262 |
|
|
iso_date(de->date, high_sierra);
|
1263 |
|
|
|
1264 |
|
|
inode->u.isofs_i.i_first_extent = (isonum_733 (de->extent) +
|
1265 |
|
|
isonum_711 (de->ext_attr_length));
|
1266 |
|
|
|
1267 |
|
|
/* Set the number of blocks for stat() - should be done before RR */
|
1268 |
|
|
inode->i_blksize = PAGE_CACHE_SIZE; /* For stat() only */
|
1269 |
|
|
inode->i_blocks = (inode->i_size + 511) >> 9;
|
1270 |
|
|
|
1271 |
|
|
/*
|
1272 |
|
|
* Now test for possible Rock Ridge extensions which will override
|
1273 |
|
|
* some of these numbers in the inode structure.
|
1274 |
|
|
*/
|
1275 |
|
|
|
1276 |
|
|
if (!high_sierra) {
|
1277 |
|
|
parse_rock_ridge_inode(de, inode);
|
1278 |
|
|
/* if we want uid/gid set, override the rock ridge setting */
|
1279 |
|
|
test_and_set_uid(&inode->i_uid, inode->i_sb->u.isofs_sb.s_uid);
|
1280 |
|
|
test_and_set_gid(&inode->i_gid, inode->i_sb->u.isofs_sb.s_gid);
|
1281 |
|
|
}
|
1282 |
|
|
|
1283 |
|
|
/* get the volume sequence number */
|
1284 |
|
|
volume_seq_no = isonum_723 (de->volume_sequence_number) ;
|
1285 |
|
|
|
1286 |
|
|
/*
|
1287 |
|
|
* Multi volume means tagging a group of CDs with info in their headers.
|
1288 |
|
|
* All CDs of a group must share the same vol set name and vol set size
|
1289 |
|
|
* and have different vol set seq num. Deciding that data is wrong based
|
1290 |
|
|
* in that three fields is wrong. The fields are informative, for
|
1291 |
|
|
* cataloging purposes in a big jukebox, ie. Read sections 4.17, 4.18, 6.6
|
1292 |
|
|
* of ftp://ftp.ecma.ch/ecma-st/Ecma-119.pdf (ECMA 119 2nd Ed = ISO 9660)
|
1293 |
|
|
*/
|
1294 |
|
|
#ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS
|
1295 |
|
|
/*
|
1296 |
|
|
* Disable checking if we see any volume number other than 0 or 1.
|
1297 |
|
|
* We could use the cruft option, but that has multiple purposes, one
|
1298 |
|
|
* of which is limiting the file size to 16Mb. Thus we silently allow
|
1299 |
|
|
* volume numbers of 0 to go through without complaining.
|
1300 |
|
|
*/
|
1301 |
|
|
if (inode->i_sb->u.isofs_sb.s_cruft == 'n' &&
|
1302 |
|
|
(volume_seq_no != 0) && (volume_seq_no != 1)) {
|
1303 |
|
|
printk(KERN_WARNING "Warning: defective CD-ROM "
|
1304 |
|
|
"(volume sequence number %d). "
|
1305 |
|
|
"Enabling \"cruft\" mount option.\n", volume_seq_no);
|
1306 |
|
|
inode->i_sb->u.isofs_sb.s_cruft = 'y';
|
1307 |
|
|
}
|
1308 |
|
|
#endif /*IGNORE_WRONG_MULTI_VOLUME_SPECS */
|
1309 |
|
|
|
1310 |
|
|
/* Install the inode operations vector */
|
1311 |
|
|
#ifndef IGNORE_WRONG_MULTI_VOLUME_SPECS
|
1312 |
|
|
if (inode->i_sb->u.isofs_sb.s_cruft != 'y' &&
|
1313 |
|
|
(volume_seq_no != 0) && (volume_seq_no != 1)) {
|
1314 |
|
|
printk(KERN_WARNING "Multi-volume CD somehow got mounted.\n");
|
1315 |
|
|
} else
|
1316 |
|
|
#endif /*IGNORE_WRONG_MULTI_VOLUME_SPECS */
|
1317 |
|
|
{
|
1318 |
|
|
if (S_ISREG(inode->i_mode)) {
|
1319 |
|
|
inode->i_fop = &generic_ro_fops;
|
1320 |
|
|
switch ( inode->u.isofs_i.i_file_format ) {
|
1321 |
|
|
#ifdef CONFIG_ZISOFS
|
1322 |
|
|
case isofs_file_compressed:
|
1323 |
|
|
inode->i_data.a_ops = &zisofs_aops;
|
1324 |
|
|
break;
|
1325 |
|
|
#endif
|
1326 |
|
|
default:
|
1327 |
|
|
inode->i_data.a_ops = &isofs_aops;
|
1328 |
|
|
break;
|
1329 |
|
|
}
|
1330 |
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
1331 |
|
|
inode->i_op = &isofs_dir_inode_operations;
|
1332 |
|
|
inode->i_fop = &isofs_dir_operations;
|
1333 |
|
|
} else if (S_ISLNK(inode->i_mode)) {
|
1334 |
|
|
inode->i_op = &page_symlink_inode_operations;
|
1335 |
|
|
inode->i_data.a_ops = &isofs_symlink_aops;
|
1336 |
|
|
} else
|
1337 |
|
|
/* XXX - parse_rock_ridge_inode() had already set i_rdev. */
|
1338 |
|
|
init_special_inode(inode, inode->i_mode,
|
1339 |
|
|
kdev_t_to_nr(inode->i_rdev));
|
1340 |
|
|
}
|
1341 |
|
|
out:
|
1342 |
|
|
if (tmpde)
|
1343 |
|
|
kfree(tmpde);
|
1344 |
|
|
if (bh)
|
1345 |
|
|
brelse(bh);
|
1346 |
|
|
return;
|
1347 |
|
|
|
1348 |
|
|
out_badread:
|
1349 |
|
|
printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
|
1350 |
|
|
fail:
|
1351 |
|
|
make_bad_inode(inode);
|
1352 |
|
|
goto out;
|
1353 |
|
|
}
|
1354 |
|
|
|
1355 |
|
|
#ifdef LEAK_CHECK
|
1356 |
|
|
#undef malloc
|
1357 |
|
|
#undef free_s
|
1358 |
|
|
#undef sb_bread
|
1359 |
|
|
#undef brelse
|
1360 |
|
|
|
1361 |
|
|
void * leak_check_malloc(unsigned int size){
|
1362 |
|
|
void * tmp;
|
1363 |
|
|
check_malloc++;
|
1364 |
|
|
tmp = kmalloc(size, GFP_KERNEL);
|
1365 |
|
|
return tmp;
|
1366 |
|
|
}
|
1367 |
|
|
|
1368 |
|
|
void leak_check_free_s(void * obj, int size){
|
1369 |
|
|
check_malloc--;
|
1370 |
|
|
return kfree(obj);
|
1371 |
|
|
}
|
1372 |
|
|
|
1373 |
|
|
struct buffer_head * leak_check_bread(struct super_block *sb, int block){
|
1374 |
|
|
check_bread++;
|
1375 |
|
|
return sb_bread(sb, block);
|
1376 |
|
|
}
|
1377 |
|
|
|
1378 |
|
|
void leak_check_brelse(struct buffer_head * bh){
|
1379 |
|
|
check_bread--;
|
1380 |
|
|
return brelse(bh);
|
1381 |
|
|
}
|
1382 |
|
|
|
1383 |
|
|
#endif
|
1384 |
|
|
|
1385 |
|
|
static DECLARE_FSTYPE_DEV(iso9660_fs_type, "iso9660", isofs_read_super);
|
1386 |
|
|
|
1387 |
|
|
static int __init init_iso9660_fs(void)
|
1388 |
|
|
{
|
1389 |
|
|
#ifdef CONFIG_ZISOFS
|
1390 |
|
|
int err;
|
1391 |
|
|
|
1392 |
|
|
err = zisofs_init();
|
1393 |
|
|
if ( err )
|
1394 |
|
|
return err;
|
1395 |
|
|
#endif
|
1396 |
|
|
return register_filesystem(&iso9660_fs_type);
|
1397 |
|
|
}
|
1398 |
|
|
|
1399 |
|
|
static void __exit exit_iso9660_fs(void)
|
1400 |
|
|
{
|
1401 |
|
|
unregister_filesystem(&iso9660_fs_type);
|
1402 |
|
|
#ifdef CONFIG_ZISOFS
|
1403 |
|
|
zisofs_cleanup();
|
1404 |
|
|
#endif
|
1405 |
|
|
}
|
1406 |
|
|
|
1407 |
|
|
EXPORT_NO_SYMBOLS;
|
1408 |
|
|
|
1409 |
|
|
module_init(init_iso9660_fs)
|
1410 |
|
|
module_exit(exit_iso9660_fs)
|
1411 |
|
|
MODULE_LICENSE("GPL");
|
1412 |
|
|
|