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
|
/*
Copyright (C) 1994, 1995, 1996 Free Software Foundation
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 "ufs.h"
#include <stdarg.h>
#include <stdio.h>
#include <error.h>
#include <device/device.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
char *ufs_version = "0.0";
struct node *diskfs_root_node;
/* Set diskfs_root_node to the root inode. */
static void
warp_root (void)
{
error_t err;
err = diskfs_cached_lookup (2, &diskfs_root_node);
assert (!err);
mutex_unlock (&diskfs_root_node->lock);
}
/* XXX */
struct mutex printf_lock = MUTEX_INITIALIZER;
int printf (const char *fmt, ...)
{
va_list arg;
int done;
va_start (arg, fmt);
mutex_lock (&printf_lock);
done = vprintf (fmt, arg);
mutex_unlock (&printf_lock);
va_end (arg);
return done;
}
int diskfs_readonly;
/* Ufs-specific options. XXX this should be moved so it can be done at
runtime as well as startup. */
static struct argp_option
options[] =
{
{"compat", 'C', "FMT", 0,
"FMT may be GNU, 4.4, or 4.2, and determines which filesystem extensions"
" are written onto the disk (default is GNU)"},
{0}
};
/* Parse a command line option. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
enum compat_mode mode;
case 'C':
if (strcasecmp (arg, "gnu") == 0)
mode = COMPAT_GNU;
else if (strcmp (arg, "4.4") == 0)
mode = COMPAT_BSD44;
else if (strcmp (arg, "4.2") == 0)
{
if (sblock
&& (sblock->fs_inodefmt == FS_44INODEFMT
|| direct_symlink_extension))
{
argp_failure (state, 0, 0,
"4.2 compat mode requested on 4.4 fs");
return EINVAL;
}
mode = COMPAT_BSD42;
}
else
{
argp_error (state, "%s: Unknown compatibility mode", arg);
return EINVAL;
}
state->hook = (void *)mode; /* Save it for the end. */
break;
case ARGP_KEY_INIT:
state->hook = (void *)compat_mode; break;
case ARGP_KEY_SUCCESS:
compat_mode = (enum compat_mode)state->hook; break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static const struct argp *startup_parents[] = {
&diskfs_std_device_startup_argp, 0
};
static const struct argp startup_argp = {
options, parse_opt, 0, 0, startup_parents
};
static const struct argp *runtime_parents[] = {
&diskfs_std_runtime_argp, 0
};
static const struct argp runtime_argp = {
options, parse_opt, 0, 0, runtime_parents
};
struct argp *diskfs_runtime_argp = (struct argp *)&runtime_argp;
int
main (int argc, char **argv)
{
error_t err;
off_t disk_size;
mach_port_t bootstrap;
argp_parse (&startup_argp, argc, argv, 0, 0, 0);
/* This must come after the args have been parsed, as this is where the
host priv ports are set for booting. */
diskfs_console_stdio ();
if (diskfs_boot_flags)
{
/* We are the bootstrap filesystem. */
bootstrap = MACH_PORT_NULL;
diskfs_use_mach_device = 1;
compat_mode = COMPAT_GNU;
}
else
{
task_get_bootstrap_port (mach_task_self (), &bootstrap);
if (bootstrap == MACH_PORT_NULL)
error (2, 0, "Must be started as a translator");
}
/* Initialize the diskfs library. Must come before any other diskfs call. */
err = diskfs_init_diskfs ();
if (err)
error (4, err, "init");
err = diskfs_device_open ();
if (err)
error (3, err, "%s", diskfs_device_arg);
if (diskfs_device_block_size != DEV_BSIZE)
error (4, err, "%s: Bad device record size %d (should be %d)",
diskfs_device_arg, diskfs_device_block_size, DEV_BSIZE);
if (diskfs_log2_device_block_size == 0)
error (4, err, "%s: Device block size (%d) not a power of 2",
diskfs_device_arg, diskfs_device_block_size);
disk_size = diskfs_device_size << diskfs_log2_device_block_size;
assert (disk_size >= SBSIZE + SBOFF);
/* Map the entire disk. */
create_disk_pager ();
/* Start the first request thread, to handle RPCs and page requests. */
diskfs_spawn_first_thread ();
get_hypermetadata ();
inode_init ();
/* Find our root node. */
warp_root ();
/* 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 this thread is done with its work. */
cthread_exit (0);
return 0;
}
error_t
diskfs_reload_global_state ()
{
flush_pokes ();
pager_flush (disk_pager, 1);
get_hypermetadata ();
return 0;
}
|
