1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/* Main entry point for the ext2 file system translator
Copyright (C) 1994,95,96,97,98,99,2002 Free Software Foundation, Inc.
Converted for ext2fs by Miles Bader <miles@gnu.ai.mit.edu>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdarg.h>
#include <stdio.h>
#include <device/device.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <error.h>
#include <argz.h>
#include <argp.h>
#include <hurd/store.h>
#include <version.h>
#include "ext2fs.h"
/* ---------------------------------------------------------------- */
int diskfs_link_max = EXT2_LINK_MAX;
int diskfs_name_max = EXT2_NAME_LEN;
int diskfs_maxsymlinks = 8;
int diskfs_shortcut_symlink = 1;
int diskfs_shortcut_chrdev = 1;
int diskfs_shortcut_blkdev = 1;
int diskfs_shortcut_fifo = 1;
int diskfs_shortcut_ifsock = 1;
char *diskfs_server_name = "ext2fs";
char *diskfs_server_version = HURD_VERSION;
char *diskfs_extra_version = "GNU Hurd; ext2 " EXT2FS_VERSION;
int diskfs_synchronous;
struct node *diskfs_root_node;
struct store *store;
struct store_parsed *store_parsed;
char *diskfs_disk_name;
#ifdef EXT2FS_DEBUG
int ext2_debug_flag;
#endif
/* Ext2fs-specific options. */
static const struct argp_option
options[] =
{
{"debug", 'D', 0, 0, "Toggle debugging output"
#ifndef EXT2FS_DEBUG
" (not compiled in)"
#endif
},
{"sblock", 'S', "BLOCKNO", 0,
"Use alternate superblock location (1kb blocks)"},
{0}
};
/* Parse a command line option. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
/* We save our parsed values in this structure, hung off STATE->hook.
Only after parsing all options successfully will we use these values. */
struct
{
int debug_flag;
unsigned int sb_block;
} *values = state->hook;
switch (key)
{
case 'D':
values->debug_flag = 1;
break;
case 'S':
values->sb_block = strtoul (arg, &arg, 0);
if (!arg || *arg != '\0')
{
argp_error (state, "invalid number for --sblock");
return EINVAL;
}
break;
case ARGP_KEY_INIT:
state->child_inputs[0] = state->input;
values = malloc (sizeof *values);
if (values == 0)
return ENOMEM;
state->hook = values;
memset (values, 0, sizeof *values);
values->sb_block = SBLOCK_BLOCK;
break;
case ARGP_KEY_SUCCESS:
/* All options parse successfully, so implement ours if possible. */
if (values->debug_flag)
{
#ifdef EXT2FS_DEBUG
ext2_debug_flag = !ext2_debug_flag;
#else
argp_failure (state, 2, 0, "debugging support not compiled in");
return EINVAL;
#endif
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* Override the standard diskfs routine so we can add our own output. */
error_t
diskfs_append_args (char **argz, size_t *argz_len)
{
error_t err;
/* Get the standard things. */
err = diskfs_append_std_options (argz, argz_len);
#ifdef EXT2FS_DEBUG
if (!err && ext2_debug_flag)
err = argz_add (argz, argz_len, "--debug");
#endif
if (! err)
err = store_parsed_append_args (store_parsed, argz, argz_len);
return err;
}
/* Add our startup arguments to the standard diskfs set. */
static const struct argp_child startup_children[] =
{{&diskfs_store_startup_argp}, {0}};
static struct argp startup_argp = {options, parse_opt, 0, 0, startup_children};
/* Similarly at runtime. */
static const struct argp_child runtime_children[] =
{{&diskfs_std_runtime_argp}, {0}};
static struct argp runtime_argp = {options, parse_opt, 0, 0, runtime_children};
struct argp *diskfs_runtime_argp = (struct argp *)&runtime_argp;
int
main (int argc, char **argv)
{
error_t err;
mach_port_t bootstrap;
/* Initialize the diskfs library, parse arguments, and open the store.
This starts the first diskfs thread for us. */
store = diskfs_init_main (&startup_argp, argc, argv,
&store_parsed, &bootstrap);
if (store->size < SBLOCK_OFFS + SBLOCK_SIZE)
ext2_panic ("device too small for superblock (%Ld bytes)", store->size);
if (store->log2_blocks_per_page < 0)
ext2_panic ("device block size (%zu) greater than page size (%zd)",
store->block_size, vm_page_size);
/* Map the entire disk. */
create_disk_pager ();
pokel_init (&global_pokel, diskfs_disk_pager, disk_cache);
map_hypermetadata ();
/* Set diskfs_root_node to the root inode. */
err = diskfs_cached_lookup (EXT2_ROOT_INO, &diskfs_root_node);
if (err)
ext2_panic ("can't get root: %s", strerror (err));
else if ((diskfs_root_node->dn_stat.st_mode & S_IFMT) == 0)
ext2_panic ("no root node!");
pthread_mutex_unlock (&diskfs_root_node->lock);
/* Now that we are all set up to handle requests, and diskfs_root_node is
set properly, it is safe to export our fsys control port to the
outside world. */
diskfs_startup_diskfs (bootstrap, 0);
/* and so we die, leaving others to do the real work. */
pthread_exit (NULL);
/* NOTREACHED */
return 0;
}
error_t
diskfs_reload_global_state ()
{
error_t err;
pokel_flush (&global_pokel);
pager_flush (diskfs_disk_pager, 1);
/* libdiskfs is not responsible for inhibiting paging. */
err = inhibit_ext2_pager ();
if (err)
return err;
get_hypermetadata ();
map_hypermetadata ();
resume_ext2_pager ();
return 0;
}
|
