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"
38 #define BLKGETSIZE64 0
39 #define BTRFS_IOC_SNAP_CREATE 0
40 #define BTRFS_VOL_NAME_MAX 255
41 struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
42 static inline int ioctl(int fd, int define, void *arg) { return 0; }
45 void print_usage(void)
47 printf("usage: btrfsctl [ -d file|dir] [ -s snap_name subvol|tree ]\n");
48 printf(" [-r size] [-A device] [-a] [-c]\n");
49 printf("\t-d filename: defragments one file\n");
50 printf("\t-d directory: defragments the entire Btree\n");
51 printf("\t-s snap_name: existing_subvol creates a new snapshot\n");
52 printf("\t-s snap_name: tree_root creates a new subvolume\n");
53 printf("\t-r [+-]size[gkm]: resize the FS by size amount\n");
54 printf("\t-A device: scans the device file for a Btrfs filesystem\n");
55 printf("\t-a: scans all devices for Btrfs filesystems\n");
56 printf("\t-c: forces a single FS sync\n");
57 printf("%s\n", BTRFS_BUILD_VERSION);
61 int main(int ac, char **av)
66 struct btrfs_ioctl_vol_args args;
71 unsigned long command = 0;
74 if (ac == 2 && strcmp(av[1], "-a") == 0) {
75 fprintf(stderr, "Scanning for Btrfs filesystems\n");
76 btrfs_scan_one_dir("/dev", 1);
79 for (i = 1; i < ac; i++) {
80 if (strcmp(av[i], "-s") == 0) {
81 if (i + 1 >= ac - 1) {
82 fprintf(stderr, "-s requires an arg");
87 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
89 "snapshot name zero length or too long\n");
92 if (strchr(name, '/')) {
94 "error: / not allowed in names\n");
97 command = BTRFS_IOC_SNAP_CREATE;
98 } else if (strcmp(av[i], "-d") == 0) {
100 fprintf(stderr, "-d requires an arg\n");
103 command = BTRFS_IOC_DEFRAG;
104 } else if (strcmp(av[i], "-A") == 0) {
106 fprintf(stderr, "-A requires an arg\n");
109 command = BTRFS_IOC_SCAN_DEV;
110 } else if (strcmp(av[i], "-r") == 0) {
112 fprintf(stderr, "-r requires an arg\n");
117 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
118 fprintf(stderr, "-r size too long\n");
121 command = BTRFS_IOC_RESIZE;
122 } else if (strcmp(av[i], "-c") == 0) {
123 command = BTRFS_IOC_SYNC;
127 fprintf(stderr, "no valid commands given\n");
132 ret = stat(fname, &st);
137 if (S_ISDIR(st.st_mode)) {
138 dirstream = opendir(fname);
143 fd = dirfd(dirstream);
144 } else if (command == BTRFS_IOC_SCAN_DEV) {
145 fd = open("/dev/btrfs-control", O_RDWR);
148 fd = open(fname, O_RDWR);
155 strcpy(args.name, name);
158 ret = ioctl(fd, command, &args);
164 printf("operation complete\n");
166 printf("ioctl failed with error %d\n", ret);
168 printf("%s\n", BTRFS_BUILD_VERSION);