2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
20 #include <sys/ioctl.h>
21 #include <sys/mount.h>
26 #include <sys/types.h>
31 #include "kerncompat.h"
33 #include "transaction.h"
37 #define BLKGETSIZE64 0
38 #define BTRFS_IOC_SNAP_CREATE 0
39 #define BTRFS_VOL_NAME_MAX 255
40 struct btrfs_ioctl_vol_args
{ char name
[BTRFS_VOL_NAME_MAX
]; };
41 static inline int ioctl(int fd
, int define
, void *arg
) { return 0; }
44 void print_usage(void)
46 printf("usage: btrfsctl [ -s name ] [-d] [-r size] file_or_dir\n");
47 printf("\t-d filename defragments one file\n");
48 printf("\t-d directory defragments the entire Btree\n");
49 printf("\t-s snap_name existing_subvol creates a new snapshot\n");
50 printf("\t-s snap_name tree_root creates a new subvolume\n");
51 printf("\t-r [+-]size[gkm] resize the FS\n");
52 printf("\t-A device scans the device for a Btrfs filesystem\n");
53 printf("\t-a scans all devices for a Btrfs filesystems\n");
57 int main(int ac
, char **av
)
62 struct btrfs_ioctl_vol_args args
;
67 unsigned long command
= 0;
70 if (ac
== 2 && strcmp(av
[1], "-a") == 0) {
71 fprintf(stderr
, "Scanning for Btrfs filesystems\n");
72 btrfs_scan_one_dir("/dev", 1);
75 for (i
= 1; i
< ac
- 1; i
++) {
76 if (strcmp(av
[i
], "-s") == 0) {
77 if (i
+ 1 >= ac
- 1) {
78 fprintf(stderr
, "-s requires an arg");
83 if (len
== 0 || len
>= BTRFS_VOL_NAME_MAX
) {
85 "snapshot name zero length or too long\n");
88 if (strchr(name
, '/')) {
90 "error: / not allowed in names\n");
93 command
= BTRFS_IOC_SNAP_CREATE
;
94 } else if (strcmp(av
[i
], "-d") == 0) {
96 fprintf(stderr
, "-d requires an arg\n");
99 command
= BTRFS_IOC_DEFRAG
;
100 } else if (strcmp(av
[i
], "-A") == 0) {
102 fprintf(stderr
, "-A requires an arg\n");
105 command
= BTRFS_IOC_SCAN_DEV
;
106 } else if (strcmp(av
[i
], "-r") == 0) {
108 fprintf(stderr
, "-r requires an arg\n");
113 if (len
== 0 || len
>= BTRFS_VOL_NAME_MAX
) {
114 fprintf(stderr
, "-r size too long\n");
117 command
= BTRFS_IOC_RESIZE
;
121 fprintf(stderr
, "no valid commands given\n");
125 ret
= stat(fname
, &st
);
130 if (S_ISDIR(st
.st_mode
)) {
131 dirstream
= opendir(fname
);
136 fd
= dirfd(dirstream
);
137 } else if (command
== BTRFS_IOC_SCAN_DEV
) {
138 fd
= open("/dev/btrfs-control", O_RDWR
);
141 fd
= open(fname
, O_RDWR
);
148 strcpy(args
.name
, name
);
151 ret
= ioctl(fd
, command
, &args
);
152 printf("ioctl returns %d\n", ret
);