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>
33 #include "kerncompat.h"
35 #include "transaction.h"
40 #define BLKGETSIZE64 0
41 #define BTRFS_IOC_SNAP_CREATE 0
42 #define BTRFS_VOL_NAME_MAX 255
43 struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
44 static inline int ioctl(int fd, int define, void *arg) { return 0; }
47 static void print_usage(void)
49 printf("usage: btrfsctl [ -d file|dir] [ -s snap_name subvol|tree ]\n");
50 printf(" [-r size] [-A device] [-a] [-c] [-D dir .]\n");
51 printf("\t-d filename: defragments one file\n");
52 printf("\t-d directory: defragments the entire Btree\n");
53 printf("\t-s snap_name dir: creates a new snapshot of dir\n");
54 printf("\t-S subvol_name dir: creates a new subvolume\n");
55 printf("\t-r [+-]size[gkm]: resize the FS by size amount\n");
56 printf("\t-A device: scans the device file for a Btrfs filesystem\n");
57 printf("\t-a: scans all devices for Btrfs filesystems\n");
58 printf("\t-c: forces a single FS sync\n");
59 printf("\t-D: delete snapshot\n");
60 printf("\t-m [tree id] directory: set the default mounted subvolume"
61 " to the [tree id] or the directory\n");
62 printf("%s\n", BTRFS_BUILD_VERSION);
66 static int open_file_or_dir(const char *fname)
73 ret = stat(fname, &st);
78 if (S_ISDIR(st.st_mode)) {
79 dirstream = opendir(fname);
84 fd = dirfd(dirstream);
86 fd = open(fname, O_RDWR);
94 int main(int ac, char **av)
97 char *snap_location = NULL;
101 struct btrfs_ioctl_vol_args args;
104 unsigned long command = 0;
111 "** WARNING: this program is considered deprecated\n"
112 "** Please consider to switch to the btrfs utility\n"
115 if (ac == 2 && strcmp(av[1], "-a") == 0) {
116 fprintf(stderr, "Scanning for Btrfs filesystems\n");
117 btrfs_scan_one_dir("/dev", 1);
120 for (i = 1; i < ac; i++) {
121 if (strcmp(av[i], "-s") == 0) {
122 if (i + 1 >= ac - 1) {
123 fprintf(stderr, "-s requires an arg");
126 fullpath = av[i + 1];
128 snap_location = strdup(fullpath);
129 snap_location = dirname(snap_location);
131 snap_fd = open_file_or_dir(snap_location);
133 name = strdup(fullpath);
134 name = basename(name);
137 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
139 "snapshot name zero length or too long\n");
142 if (strchr(name, '/')) {
144 "error: / not allowed in names\n");
147 command = BTRFS_IOC_SNAP_CREATE;
148 } else if (strcmp(av[i], "-S") == 0) {
149 if (i + 1 >= ac - 1) {
150 fprintf(stderr, "-S requires an arg");
155 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
157 "snapshot name zero length or too long\n");
160 if (strchr(name, '/')) {
162 "error: / not allowed in names\n");
165 command = BTRFS_IOC_SUBVOL_CREATE;
166 } else if (strcmp(av[i], "-d") == 0) {
168 fprintf(stderr, "-d requires an arg\n");
171 command = BTRFS_IOC_DEFRAG;
172 } else if (strcmp(av[i], "-D") == 0) {
174 fprintf(stderr, "-D requires an arg\n");
177 command = BTRFS_IOC_SNAP_DESTROY;
180 pos = strchr(name, '/');
182 if (*(pos + 1) == '\0')
186 "error: / not allowed in names\n");
190 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
191 fprintf(stderr, "-D size too long\n");
194 } else if (strcmp(av[i], "-A") == 0) {
196 fprintf(stderr, "-A requires an arg\n");
199 command = BTRFS_IOC_SCAN_DEV;
200 } else if (strcmp(av[i], "-r") == 0) {
202 fprintf(stderr, "-r requires an arg\n");
207 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
208 fprintf(stderr, "-r size too long\n");
211 command = BTRFS_IOC_RESIZE;
212 } else if (strcmp(av[i], "-c") == 0) {
213 command = BTRFS_IOC_SYNC;
214 } else if (strcmp(av[i], "-m") == 0) {
215 command = BTRFS_IOC_DEFAULT_SUBVOL;
217 objectid = (unsigned long long)
218 strtoll(av[i + 1], NULL, 0);
219 if (errno == ERANGE) {
220 fprintf(stderr, "invalid tree id\n");
227 fprintf(stderr, "no valid commands given\n");
233 if (command == BTRFS_IOC_SCAN_DEV) {
234 fd = open("/dev/btrfs-control", O_RDWR);
236 perror("failed to open /dev/btrfs-control");
241 fd = open_file_or_dir(fname);
245 strncpy(args.name, name, BTRFS_PATH_NAME_MAX + 1);
246 args.name[BTRFS_PATH_NAME_MAX] = 0;
250 if (command == BTRFS_IOC_SNAP_CREATE) {
252 ret = ioctl(snap_fd, command, &args);
253 } else if (command == BTRFS_IOC_DEFAULT_SUBVOL) {
254 printf("objectid is %llu\n", (unsigned long long)objectid);
255 ret = ioctl(fd, command, &objectid);
257 ret = ioctl(fd, command, &args);
263 printf("operation complete\n");
265 printf("ioctl failed with error %d\n", ret);
267 printf("%s\n", BTRFS_BUILD_VERSION);