2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public
4 * License v2 as published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
9 * General Public License for more details.
11 * You should have received a copy of the GNU General Public
12 * License along with this program; if not, write to the
13 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
14 * Boston, MA 021110-1307, USA.
22 #include <sys/ioctl.h>
26 #include "kerncompat.h"
33 /* FIXME - imported cruft, fix sparse errors and warnings */
35 #define BLKGETSIZE64 0
36 #define BTRFS_IOC_SNAP_CREATE_V2 0
37 #define BTRFS_VOL_NAME_MAX 255
38 struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
39 static inline int ioctl(int fd, int define, void *arg) { return 0; }
42 static const char * const device_cmd_group_usage[] = {
43 "btrfs device <command> [<args>]",
47 static const char * const cmd_add_dev_usage[] = {
48 "btrfs device add <device> [<device>...] <path>",
49 "Add a device to a filesystem",
53 static int cmd_add_dev(int argc, char **argv)
56 int i, fdmnt, ret=0, e;
58 if (check_argc_min(argc, 3))
59 usage(cmd_add_dev_usage);
61 mntpnt = argv[argc - 1];
63 fdmnt = open_file_or_dir(mntpnt);
65 fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
69 for (i = 1; i < argc - 1; i++ ){
70 struct btrfs_ioctl_vol_args ioctl_args;
72 u64 dev_block_count = 0;
76 res = check_mounted(argv[i]);
78 fprintf(stderr, "error checking %s mount status\n",
84 fprintf(stderr, "%s is mounted\n", argv[i]);
89 devfd = open(argv[i], O_RDWR);
91 fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
95 res = fstat(devfd, &st);
97 fprintf(stderr, "ERROR: Unable to stat '%s'\n", argv[i]);
102 if (!S_ISBLK(st.st_mode)) {
103 fprintf(stderr, "ERROR: '%s' is not a block device\n", argv[i]);
109 res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count,
112 fprintf(stderr, "ERROR: Unable to init '%s'\n", argv[i]);
119 strncpy(ioctl_args.name, argv[i], BTRFS_PATH_NAME_MAX);
120 ioctl_args.name[BTRFS_PATH_NAME_MAX-1] = 0;
121 res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
124 fprintf(stderr, "ERROR: error adding the device '%s' - %s\n",
125 argv[i], strerror(e));
138 static const char * const cmd_rm_dev_usage[] = {
139 "btrfs device delete <device> [<device>...] <path>",
140 "Remove a device from a filesystem",
144 static int cmd_rm_dev(int argc, char **argv)
147 int i, fdmnt, ret=0, e;
149 if (check_argc_min(argc, 3))
150 usage(cmd_rm_dev_usage);
152 mntpnt = argv[argc - 1];
154 fdmnt = open_file_or_dir(mntpnt);
156 fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
160 for(i=1 ; i < argc - 1; i++ ){
161 struct btrfs_ioctl_vol_args arg;
164 strncpy(arg.name, argv[i], BTRFS_PATH_NAME_MAX);
165 arg.name[BTRFS_PATH_NAME_MAX-1] = 0;
166 res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
169 fprintf(stderr, "ERROR: error removing the device '%s' - %s\n",
170 argv[i], strerror(e));
182 static const char * const cmd_scan_dev_usage[] = {
183 "btrfs device scan [<device>...]",
184 "Scan devices for a btrfs filesystem",
188 static int cmd_scan_dev(int argc, char **argv)
194 if( argc > 1 && !strcmp(argv[1],"--all-devices")){
195 if (check_argc_max(argc, 2))
196 usage(cmd_scan_dev_usage);
206 printf("Scanning for Btrfs filesystems\n");
208 ret = btrfs_scan_block_devices(1);
210 ret = btrfs_scan_one_dir("/dev", 1);
212 fprintf(stderr, "ERROR: error %d while scanning\n", ret);
218 fd = open("/dev/btrfs-control", O_RDWR);
220 perror("failed to open /dev/btrfs-control");
224 for( i = devstart ; i < argc ; i++ ){
225 struct btrfs_ioctl_vol_args args;
228 printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]);
230 strncpy(args.name, argv[i], BTRFS_PATH_NAME_MAX);
231 args.name[BTRFS_PATH_NAME_MAX-1] = 0;
233 * FIXME: which are the error code returned by this ioctl ?
234 * it seems that is impossible to understand if there no is
235 * a btrfs filesystem from an I/O error !!!
237 ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
242 fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n",
243 argv[i], strerror(e));
252 static const char * const cmd_ready_dev_usage[] = {
253 "btrfs device ready <device>",
254 "Check device to see if it has all of it's devices in cache for mounting",
258 static int cmd_ready_dev(int argc, char **argv)
260 struct btrfs_ioctl_vol_args args;
264 if (check_argc_min(argc, 2))
265 usage(cmd_ready_dev_usage);
267 fd = open("/dev/btrfs-control", O_RDWR);
269 perror("failed to open /dev/btrfs-control");
273 strncpy(args.name, argv[argc - 1], BTRFS_PATH_NAME_MAX);
274 ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
276 fprintf(stderr, "ERROR: unable to determine if the device '%s'"
277 " is ready for mounting - %s\n", argv[argc - 1],
286 static const char * const cmd_dev_stats_usage[] = {
287 "btrfs device stats [-z] <path>|<device>",
288 "Show current device IO stats. -z to reset stats afterwards.",
292 static int cmd_dev_stats(int argc, char **argv)
295 struct btrfs_ioctl_fs_info_args fi_args;
296 struct btrfs_ioctl_dev_info_args *di_args = NULL;
306 while ((c = getopt(argc, argv, "z")) != -1) {
309 flags = BTRFS_DEV_STATS_RESET;
313 fprintf(stderr, "ERROR: device stat args invalid.\n"
314 " device stat [-z] <path>|<device>\n"
315 " -z to reset stats after reading.\n");
320 if (optind + 1 != argc) {
321 fprintf(stderr, "ERROR: device stat needs path|device as single"
328 fdmnt = open_file_or_dir(path);
330 fprintf(stderr, "ERROR: can't access '%s'\n", path);
334 ret = get_fs_info(fdmnt, path, &fi_args, &di_args);
336 fprintf(stderr, "ERROR: getting dev info for devstats failed: "
337 "%s\n", strerror(-ret));
341 if (!fi_args.num_devices) {
342 fprintf(stderr, "ERROR: no devices found\n");
347 for (i = 0; i < fi_args.num_devices; i++) {
348 struct btrfs_ioctl_get_dev_stats args = {0};
349 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
351 strncpy((char *)path, (char *)di_args[i].path,
352 BTRFS_DEVICE_PATH_NAME_MAX);
353 path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0';
355 args.devid = di_args[i].devid;
356 args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
359 if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
361 "ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
362 path, strerror(errno));
365 if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
366 printf("[%s].write_io_errs %llu\n",
368 (unsigned long long) args.values[
369 BTRFS_DEV_STAT_WRITE_ERRS]);
370 if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
371 printf("[%s].read_io_errs %llu\n",
373 (unsigned long long) args.values[
374 BTRFS_DEV_STAT_READ_ERRS]);
375 if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
376 printf("[%s].flush_io_errs %llu\n",
378 (unsigned long long) args.values[
379 BTRFS_DEV_STAT_FLUSH_ERRS]);
380 if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
381 printf("[%s].corruption_errs %llu\n",
383 (unsigned long long) args.values[
384 BTRFS_DEV_STAT_CORRUPTION_ERRS]);
385 if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
386 printf("[%s].generation_errs %llu\n",
388 (unsigned long long) args.values[
389 BTRFS_DEV_STAT_GENERATION_ERRS]);
402 const struct cmd_group device_cmd_group = {
403 device_cmd_group_usage, NULL, {
404 { "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 },
405 { "delete", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 },
406 { "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 },
407 { "ready", cmd_ready_dev, cmd_ready_dev_usage, NULL, 0 },
408 { "stats", cmd_dev_stats, cmd_dev_stats_usage, NULL, 0 },
413 int cmd_device(int argc, char **argv)
415 return handle_command_group(&device_cmd_group, argc, argv);