summaryrefslogtreecommitdiff
path: root/ufs/main.c
blob: 5a447f946df102e4ae84924f97cec65cb813d351 (plain)
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
/* 
   Copyright (C) 1994, 1995 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>

char *ufs_version = "0.0 pre-alpha";

struct node *diskfs_root_node;

/* Set diskfs_root_node to the root inode. */
static void
warp_root (void)
{
  error_t err;
  err = iget (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;

int
main (int argc, char **argv)
{
  error_t err;
  off_t disk_size;
  mach_port_t bootstrap;

  argp_parse (diskfs_device_startup_argp, argc, argv, 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. */
  diskfs_init_diskfs ();

  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 ();

  err = vm_map (mach_task_self (), (vm_address_t *)&disk_image,
		disk_size, 0, 1, diskpagerport, 0, 0, 
		VM_PROT_READ | (diskfs_readonly ? 0 : VM_PROT_WRITE),
		VM_PROT_READ | VM_PROT_WRITE,
		VM_INHERIT_NONE);
  assert (!err);

  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);
  
  /* And this thread is done with its work. */
  cthread_exit (0);

  return 0;
}

error_t 
diskfs_reload_global_state ()
{
  flush_pokes ();
  pager_flush (diskpager->p, 1);
  get_hypermetadata ();
  return 0;
}