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
|
/*
* Copyright (C) 2007 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#define _GNU_SOURCE
#ifndef __CHECKER__
#include <sys/ioctl.h>
#include <sys/mount.h>
#include "ioctl.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <uuid/uuid.h>
#include "kerncompat.h"
#include "ctree.h"
#include "transaction.h"
#include "utils.h"
#include "volumes.h"
#ifdef __CHECKER__
#define BLKGETSIZE64 0
#define BTRFS_IOC_SNAP_CREATE 0
#define BTRFS_IOC_ADD_DEV 0
#define BTRFS_IOC_RM_DEV 0
#define BTRFS_VOL_NAME_MAX 255
struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
static inline int ioctl(int fd, int define, void *arg) { return 0; }
#endif
static void print_usage(void)
{
fprintf(stderr, "usage: btrfs-vol [options] mount_point\n");
fprintf(stderr, "\t-a device add one device\n");
fprintf(stderr, "\t-b balance chunks across all devices\n");
fprintf(stderr, "\t-r device remove one device\n");
exit(1);
}
static struct option long_options[] = {
/* { "byte-count", 1, NULL, 'b' }, */
{ "add", 1, NULL, 'a' },
{ "balance", 0, NULL, 'b' },
{ "remove", 1, NULL, 'r' },
{ 0, 0, 0, 0}
};
int main(int ac, char **av)
{
struct stat st;
char *device = NULL;
char *mnt = NULL;
int ret;
int option_index = 0;
int cmd = 0;
int fd;
int devfd = 0;
DIR *dirstream;
struct btrfs_ioctl_vol_args args;
u64 dev_block_count = 0;
printf( "**\n"
"** WARNING: this program is considered deprecated\n"
"** Please consider to switch to the btrfs utility\n"
"**\n");
while(1) {
int c;
c = getopt_long(ac, av, "a:br:", long_options,
&option_index);
if (c < 0)
break;
switch(c) {
case 'a':
device = strdup(optarg);
cmd = BTRFS_IOC_ADD_DEV;
break;
case 'b':
cmd = BTRFS_IOC_BALANCE;
break;
case 'r':
device = strdup(optarg);
cmd = BTRFS_IOC_RM_DEV;
break;
default:
print_usage();
}
}
ac = ac - optind;
if (ac == 0)
print_usage();
mnt = av[optind];
if (device && strcmp(device, "missing") == 0 &&
cmd == BTRFS_IOC_RM_DEV) {
fprintf(stderr, "removing missing devices from %s\n", mnt);
} else if (cmd != BTRFS_IOC_BALANCE) {
if (cmd == BTRFS_IOC_ADD_DEV) {
ret = check_mounted(device);
if (ret < 0) {
fprintf(stderr,
"error checking %s mount status\n",
device);
exit(1);
}
if (ret == 1) {
fprintf(stderr, "%s is mounted\n", device);
exit(1);
}
}
devfd = open(device, O_RDWR);
if (devfd < 0) {
fprintf(stderr, "Unable to open device %s\n", device);
exit(1);
}
ret = fstat(devfd, &st);
if (ret) {
fprintf(stderr, "Unable to stat %s\n", device);
exit(1);
}
if (!S_ISBLK(st.st_mode)) {
fprintf(stderr, "%s is not a block device\n", device);
exit(1);
}
}
dirstream = opendir(mnt);
if (!dirstream) {
fprintf(stderr, "Unable to open directory %s\n", mnt);
exit(1);
}
if (cmd == BTRFS_IOC_ADD_DEV) {
int mixed = 0;
ret = btrfs_prepare_device(devfd, device, 1, &dev_block_count,
0, &mixed, 0);
if (ret) {
fprintf(stderr, "Unable to init %s\n", device);
exit(1);
}
}
fd = dirfd(dirstream);
if (device)
strcpy(args.name, device);
else
args.name[0] = '\0';
ret = ioctl(fd, cmd, &args);
printf("ioctl returns %d\n", ret);
return 0;
}
|
