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btrfs-progs: use the correct SI prefixes
[btrfs-progs-unstable/devel.git] / cmds-filesystem.c
blobe4b278590ca697e8dd387dd1b13d9b5f05e12f7d
1 /*
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.
5 *
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.
10 *
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.
15 */
16
17 #define _XOPEN_SOURCE 500
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <string.h>
21 #include <unistd.h>
22 #include <sys/ioctl.h>
23 #include <errno.h>
24 #include <uuid/uuid.h>
25 #include <ctype.h>
26 #include <fcntl.h>
27 #include <ftw.h>
28 #include <mntent.h>
29 #include <linux/limits.h>
30 #include <getopt.h>
31
32 #include "kerncompat.h"
33 #include "ctree.h"
34 #include "ioctl.h"
35 #include "utils.h"
36 #include "volumes.h"
37 #include "version.h"
38 #include "commands.h"
39 #include "list_sort.h"
40 #include "disk-io.h"
41
42
43 /*
44 * for btrfs fi show, we maintain a hash of fsids we've already printed.
45 * This way we don't print dups if a given FS is mounted more than once.
46 */
47 #define SEEN_FSID_HASH_SIZE 256
48
49 struct seen_fsid {
50 u8 fsid[BTRFS_FSID_SIZE];
51 struct seen_fsid *next;
52 };
53
54 static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
55
56 static int is_seen_fsid(u8 *fsid)
57 {
58 u8 hash = fsid[0];
59 int slot = hash % SEEN_FSID_HASH_SIZE;
60 struct seen_fsid *seen = seen_fsid_hash[slot];
61
62 return seen ? 1 : 0;
63 }
64
65 static int add_seen_fsid(u8 *fsid)
66 {
67 u8 hash = fsid[0];
68 int slot = hash % SEEN_FSID_HASH_SIZE;
69 struct seen_fsid *seen = seen_fsid_hash[slot];
70 struct seen_fsid *alloc;
71
72 if (!seen)
73 goto insert;
74
75 while (1) {
76 if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
77 return -EEXIST;
78
79 if (!seen->next)
80 break;
81
82 seen = seen->next;
83 }
84
85 insert:
86
87 alloc = malloc(sizeof(*alloc));
88 if (!alloc)
89 return -ENOMEM;
90
91 alloc->next = NULL;
92 memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
93
94 if (seen)
95 seen->next = alloc;
96 else
97 seen_fsid_hash[slot] = alloc;
98
99 return 0;
100 }
101
102 static void free_seen_fsid(void)
103 {
104 int slot;
105 struct seen_fsid *seen;
106 struct seen_fsid *next;
107
108 for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
109 seen = seen_fsid_hash[slot];
110 while (seen) {
111 next = seen->next;
112 free(seen);
113 seen = next;
114 }
115 seen_fsid_hash[slot] = NULL;
116 }
117 }
118
119 static const char * const filesystem_cmd_group_usage[] = {
120 "btrfs filesystem [<group>] <command> [<args>]",
121 NULL
122 };
123
124 static const char * const cmd_df_usage[] = {
125 "btrfs filesystem df [options] <path>",
126 "Show space usage information for a mount point",
127 "-b|--raw raw numbers in bytes",
128 "-h human friendly numbers, base 1024 (default)",
129 "-H human friendly numbers, base 1000",
130 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)",
131 "--si use 1000 as a base (kB, MB, GB, TB)",
132 "-k|--kbytes show sizes in KiB, or kB with --si",
133 "-m|--mbytes show sizes in MiB, or MB with --si",
134 "-g|--gbytes show sizes in GiB, or GB with --si",
135 "-t|--tbytes show sizes in TiB, or TB with --si",
136 NULL
137 };
138
139 static char *group_type_str(u64 flag)
140 {
141 u64 mask = BTRFS_BLOCK_GROUP_TYPE_MASK |
142 BTRFS_SPACE_INFO_GLOBAL_RSV;
143
144 switch (flag & mask) {
145 case BTRFS_BLOCK_GROUP_DATA:
146 return "Data";
147 case BTRFS_BLOCK_GROUP_SYSTEM:
148 return "System";
149 case BTRFS_BLOCK_GROUP_METADATA:
150 return "Metadata";
151 case BTRFS_BLOCK_GROUP_DATA|BTRFS_BLOCK_GROUP_METADATA:
152 return "Data+Metadata";
153 case BTRFS_SPACE_INFO_GLOBAL_RSV:
154 return "GlobalReserve";
155 default:
156 return "unknown";
157 }
158 }
159
160 static char *group_profile_str(u64 flag)
161 {
162 switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
163 case 0:
164 return "single";
165 case BTRFS_BLOCK_GROUP_RAID0:
166 return "RAID0";
167 case BTRFS_BLOCK_GROUP_RAID1:
168 return "RAID1";
169 case BTRFS_BLOCK_GROUP_RAID5:
170 return "RAID5";
171 case BTRFS_BLOCK_GROUP_RAID6:
172 return "RAID6";
173 case BTRFS_BLOCK_GROUP_DUP:
174 return "DUP";
175 case BTRFS_BLOCK_GROUP_RAID10:
176 return "RAID10";
177 default:
178 return "unknown";
179 }
180 }
181
182 static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
183 {
184 u64 count = 0;
185 int ret, e;
186 struct btrfs_ioctl_space_args *sargs;
187
188 sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
189 if (!sargs)
190 return -ENOMEM;
191
192 sargs->space_slots = 0;
193 sargs->total_spaces = 0;
194
195 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
196 e = errno;
197 if (ret) {
198 fprintf(stderr, "ERROR: couldn't get space info - %s\n",
199 strerror(e));
200 free(sargs);
201 return -e;
202 }
203 /* This really should never happen */
204 if (!sargs->total_spaces) {
205 free(sargs);
206 return -ENOENT;
207 }
208 count = sargs->total_spaces;
209 free(sargs);
210
211 sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
212 (count * sizeof(struct btrfs_ioctl_space_info)));
213 if (!sargs)
214 return -ENOMEM;
215
216 sargs->space_slots = count;
217 sargs->total_spaces = 0;
218 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
219 e = errno;
220 if (ret) {
221 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
222 count, strerror(e));
223 free(sargs);
224 return -e;
225 }
226 *sargs_ret = sargs;
227 return 0;
228 }
229
230 static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode)
231 {
232 u64 i;
233 struct btrfs_ioctl_space_info *sp = sargs->spaces;
234
235 for (i = 0; i < sargs->total_spaces; i++, sp++) {
236 printf("%s, %s: total=%s, used=%s\n",
237 group_type_str(sp->flags),
238 group_profile_str(sp->flags),
239 pretty_size_mode(sp->total_bytes, unit_mode),
240 pretty_size_mode(sp->used_bytes, unit_mode));
241 }
242 }
243
244 static int cmd_df(int argc, char **argv)
245 {
246 struct btrfs_ioctl_space_args *sargs = NULL;
247 int ret;
248 int fd;
249 char *path;
250 DIR *dirstream = NULL;
251 unsigned unit_mode = UNITS_DEFAULT;
252
253 while (1) {
254 int long_index;
255 static const struct option long_options[] = {
256 { "raw", no_argument, NULL, 'b'},
257 { "kbytes", no_argument, NULL, 'k'},
258 { "mbytes", no_argument, NULL, 'm'},
259 { "gbytes", no_argument, NULL, 'g'},
260 { "tbytes", no_argument, NULL, 't'},
261 { "si", no_argument, NULL, 256},
262 { "iec", no_argument, NULL, 257},
263 };
264 int c = getopt_long(argc, argv, "bhHkmgt", long_options,
265 &long_index);
266 if (c < 0)
267 break;
268 switch (c) {
269 case 'b':
270 unit_mode = UNITS_RAW;
271 break;
272 case 'k':
273 units_set_base(&unit_mode, UNITS_KBYTES);
274 break;
275 case 'm':
276 units_set_base(&unit_mode, UNITS_MBYTES);
277 break;
278 case 'g':
279 units_set_base(&unit_mode, UNITS_GBYTES);
280 break;
281 case 't':
282 units_set_base(&unit_mode, UNITS_TBYTES);
283 break;
284 case 'h':
285 unit_mode = UNITS_HUMAN_BINARY;
286 break;
287 case 'H':
288 unit_mode = UNITS_HUMAN_DECIMAL;
289 break;
290 case 256:
291 units_set_mode(&unit_mode, UNITS_DECIMAL);
292 break;
293 case 257:
294 units_set_mode(&unit_mode, UNITS_BINARY);
295 break;
296 default:
297 usage(cmd_df_usage);
298 }
299 }
300
301 if (check_argc_exact(argc, optind + 1))
302 usage(cmd_df_usage);
303
304 path = argv[optind];
305
306 fd = open_file_or_dir(path, &dirstream);
307 if (fd < 0) {
308 fprintf(stderr, "ERROR: can't access '%s'\n", path);
309 return 1;
310 }
311 ret = get_df(fd, &sargs);
312
313 if (ret == 0) {
314 print_df(sargs, unit_mode);
315 free(sargs);
316 } else {
317 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret));
318 }
319
320 close_file_or_dir(fd, dirstream);
321 return !!ret;
322 }
323
324 static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label,
325 char *search)
326 {
327 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
328 int search_len = strlen(search);
329
330 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
331 uuid_unparse(fsid, uuidbuf);
332 if (!strncmp(uuidbuf, search, search_len))
333 return 1;
334
335 if (strlen(label) && strcmp(label, search) == 0)
336 return 1;
337
338 if (strcmp(mnt, search) == 0)
339 return 1;
340
341 return 0;
342 }
343
344 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
345 {
346 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
347 struct list_head *cur;
348 struct btrfs_device *device;
349 int search_len = strlen(search);
350
351 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
352 uuid_unparse(fs_devices->fsid, uuidbuf);
353 if (!strncmp(uuidbuf, search, search_len))
354 return 1;
355
356 list_for_each(cur, &fs_devices->devices) {
357 device = list_entry(cur, struct btrfs_device, dev_list);
358 if ((device->label && strcmp(device->label, search) == 0) ||
359 strcmp(device->name, search) == 0)
360 return 1;
361 }
362 return 0;
363 }
364
365 /*
366 * Sort devices by devid, ascending
367 */
368 static int cmp_device_id(void *priv, struct list_head *a,
369 struct list_head *b)
370 {
371 const struct btrfs_device *da = list_entry(a, struct btrfs_device,
372 dev_list);
373 const struct btrfs_device *db = list_entry(b, struct btrfs_device,
374 dev_list);
375
376 return da->devid < db->devid ? -1 :
377 da->devid > db->devid ? 1 : 0;
378 }
379
380 static void splice_device_list(struct list_head *seed_devices,
381 struct list_head *all_devices)
382 {
383 struct btrfs_device *in_all, *next_all;
384 struct btrfs_device *in_seed, *next_seed;
385
386 list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) {
387 list_for_each_entry_safe(in_seed, next_seed, seed_devices,
388 dev_list) {
389 if (in_all->devid == in_seed->devid) {
390 /*
391 * When do dev replace in a sprout fs
392 * to a dev in its seed fs, the replacing
393 * dev will reside in the sprout fs and
394 * the replaced dev will still exist
395 * in the seed fs.
396 * So pick the latest one when showing
397 * the sprout fs.
398 */
399 if (in_all->generation
400 < in_seed->generation) {
401 list_del(&in_all->dev_list);
402 free(in_all);
403 } else if (in_all->generation
404 > in_seed->generation) {
405 list_del(&in_seed->dev_list);
406 free(in_seed);
407 }
408 break;
409 }
410 }
411 }
412
413 list_splice(seed_devices, all_devices);
414 }
415
416 static void print_devices(struct btrfs_fs_devices *fs_devices,
417 u64 *devs_found)
418 {
419 struct btrfs_device *device;
420 struct btrfs_fs_devices *cur_fs;
421 struct list_head *all_devices;
422
423 all_devices = &fs_devices->devices;
424 cur_fs = fs_devices->seed;
425 /* add all devices of seed fs to the fs to be printed */
426 while (cur_fs) {
427 splice_device_list(&cur_fs->devices, all_devices);
428 cur_fs = cur_fs->seed;
429 }
430
431 list_sort(NULL, all_devices, cmp_device_id);
432 list_for_each_entry(device, all_devices, dev_list) {
433 printf("\tdevid %4llu size %s used %s path %s\n",
434 (unsigned long long)device->devid,
435 pretty_size(device->total_bytes),
436 pretty_size(device->bytes_used), device->name);
437
438 (*devs_found)++;
439 }
440 }
441
442 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
443 {
444 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
445 struct btrfs_device *device;
446 u64 devs_found = 0;
447 u64 total;
448
449 if (add_seen_fsid(fs_devices->fsid))
450 return;
451
452 uuid_unparse(fs_devices->fsid, uuidbuf);
453 device = list_entry(fs_devices->devices.next, struct btrfs_device,
454 dev_list);
455 if (device->label && device->label[0])
456 printf("Label: '%s' ", device->label);
457 else
458 printf("Label: none ");
459
460 total = device->total_devs;
461 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
462 (unsigned long long)total,
463 pretty_size(device->super_bytes_used));
464
465 print_devices(fs_devices, &devs_found);
466
467 if (devs_found < total) {
468 printf("\t*** Some devices missing\n");
469 }
470 printf("\n");
471 }
472
473 /* adds up all the used spaces as reported by the space info ioctl
474 */
475 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
476 {
477 u64 ret = 0;
478 int i;
479 for (i = 0; i < si->total_spaces; i++)
480 ret += si->spaces[i].used_bytes;
481 return ret;
482 }
483
484 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
485 struct btrfs_ioctl_dev_info_args *dev_info,
486 struct btrfs_ioctl_space_args *space_info,
487 char *label, char *path)
488 {
489 int i;
490 int fd;
491 int missing = 0;
492 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
493 struct btrfs_ioctl_dev_info_args *tmp_dev_info;
494 int ret;
495
496 ret = add_seen_fsid(fs_info->fsid);
497 if (ret == -EEXIST)
498 return 0;
499 else if (ret)
500 return ret;
501
502 uuid_unparse(fs_info->fsid, uuidbuf);
503 if (label && strlen(label))
504 printf("Label: '%s' ", label);
505 else
506 printf("Label: none ");
507
508 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
509 fs_info->num_devices,
510 pretty_size(calc_used_bytes(space_info)));
511
512 for (i = 0; i < fs_info->num_devices; i++) {
513 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
514
515 /* Add check for missing devices even mounted */
516 fd = open((char *)tmp_dev_info->path, O_RDONLY);
517 if (fd < 0) {
518 missing = 1;
519 continue;
520 }
521 close(fd);
522 printf("\tdevid %4llu size %s used %s path %s\n",
523 tmp_dev_info->devid,
524 pretty_size(tmp_dev_info->total_bytes),
525 pretty_size(tmp_dev_info->bytes_used),
526 tmp_dev_info->path);
527 }
528
529 if (missing)
530 printf("\t*** Some devices missing\n");
531 printf("\n");
532 return 0;
533 }
534
535 /* This function checks if the given input parameter is
536 * an uuid or a path
537 * return -1: some error in the given input
538 * return 0: unknow input
539 * return 1: given input is uuid
540 * return 2: given input is path
541 */
542 static int check_arg_type(char *input)
543 {
544 uuid_t out;
545 char path[PATH_MAX];
546
547 if (!input)
548 return -EINVAL;
549
550 if (realpath(input, path)) {
551 if (is_block_device(path) == 1)
552 return BTRFS_ARG_BLKDEV;
553
554 if (is_mount_point(path) == 1)
555 return BTRFS_ARG_MNTPOINT;
556
557 return BTRFS_ARG_UNKNOWN;
558 }
559
560 if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
561 !uuid_parse(input, out))
562 return BTRFS_ARG_UUID;
563
564 return BTRFS_ARG_UNKNOWN;
565 }
566
567 static int btrfs_scan_kernel(void *search)
568 {
569 int ret = 0, fd;
570 int found = 0;
571 FILE *f;
572 struct mntent *mnt;
573 struct btrfs_ioctl_fs_info_args fs_info_arg;
574 struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
575 struct btrfs_ioctl_space_args *space_info_arg = NULL;
576 char label[BTRFS_LABEL_SIZE];
577
578 f = setmntent("/proc/self/mounts", "r");
579 if (f == NULL)
580 return 1;
581
582 memset(label, 0, sizeof(label));
583 while ((mnt = getmntent(f)) != NULL) {
584 if (strcmp(mnt->mnt_type, "btrfs"))
585 continue;
586 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
587 &dev_info_arg);
588 if (ret)
589 goto out;
590
591 if (get_label_mounted(mnt->mnt_dir, label)) {
592 kfree(dev_info_arg);
593 goto out;
594 }
595 if (search && !match_search_item_kernel(fs_info_arg.fsid,
596 mnt->mnt_dir, label, search)) {
597 kfree(dev_info_arg);
598 continue;
599 }
600
601 fd = open(mnt->mnt_dir, O_RDONLY);
602 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
603 print_one_fs(&fs_info_arg, dev_info_arg,
604 space_info_arg, label, mnt->mnt_dir);
605 kfree(space_info_arg);
606 memset(label, 0, sizeof(label));
607 found = 1;
608 }
609 if (fd != -1)
610 close(fd);
611 kfree(dev_info_arg);
612 }
613
614 out:
615 endmntent(f);
616 return !found;
617 }
618
619 static int dev_to_fsid(char *dev, __u8 *fsid)
620 {
621 struct btrfs_super_block *disk_super;
622 char *buf;
623 int ret;
624 int fd;
625
626 buf = malloc(4096);
627 if (!buf)
628 return -ENOMEM;
629
630 fd = open(dev, O_RDONLY);
631 if (fd < 0) {
632 ret = -errno;
633 free(buf);
634 return ret;
635 }
636
637 disk_super = (struct btrfs_super_block *)buf;
638 ret = btrfs_read_dev_super(fd, disk_super,
639 BTRFS_SUPER_INFO_OFFSET, 0);
640 if (ret)
641 goto out;
642
643 memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE);
644 ret = 0;
645
646 out:
647 close(fd);
648 free(buf);
649 return ret;
650 }
651
652 static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
653 {
654 struct btrfs_fs_devices *cur_seed, *next_seed;
655 struct btrfs_device *device;
656
657 while (!list_empty(&fs_devices->devices)) {
658 device = list_entry(fs_devices->devices.next,
659 struct btrfs_device, dev_list);
660 list_del(&device->dev_list);
661
662 free(device->name);
663 free(device->label);
664 free(device);
665 }
666
667 /* free seed fs chain */
668 cur_seed = fs_devices->seed;
669 fs_devices->seed = NULL;
670 while (cur_seed) {
671 next_seed = cur_seed->seed;
672 free(cur_seed);
673
674 cur_seed = next_seed;
675 }
676
677 list_del(&fs_devices->list);
678 free(fs_devices);
679 }
680
681 static int copy_device(struct btrfs_device *dst,
682 struct btrfs_device *src)
683 {
684 dst->devid = src->devid;
685 memcpy(dst->uuid, src->uuid, BTRFS_UUID_SIZE);
686 if (src->name == NULL)
687 dst->name = NULL;
688 else {
689 dst->name = strdup(src->name);
690 if (!dst->name)
691 return -ENOMEM;
692 }
693 if (src->label == NULL)
694 dst->label = NULL;
695 else {
696 dst->label = strdup(src->label);
697 if (!dst->label) {
698 free(dst->name);
699 return -ENOMEM;
700 }
701 }
702 dst->total_devs = src->total_devs;
703 dst->super_bytes_used = src->super_bytes_used;
704 dst->total_bytes = src->total_bytes;
705 dst->bytes_used = src->bytes_used;
706 dst->generation = src->generation;
707
708 return 0;
709 }
710
711 static int copy_fs_devices(struct btrfs_fs_devices *dst,
712 struct btrfs_fs_devices *src)
713 {
714 struct btrfs_device *cur_dev, *dev_copy;
715 int ret = 0;
716
717 memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE);
718 INIT_LIST_HEAD(&dst->devices);
719 dst->seed = NULL;
720
721 list_for_each_entry(cur_dev, &src->devices, dev_list) {
722 dev_copy = malloc(sizeof(*dev_copy));
723 if (!dev_copy) {
724 ret = -ENOMEM;
725 break;
726 }
727
728 ret = copy_device(dev_copy, cur_dev);
729 if (ret) {
730 free(dev_copy);
731 break;
732 }
733
734 list_add(&dev_copy->dev_list, &dst->devices);
735 dev_copy->fs_devices = dst;
736 }
737
738 return ret;
739 }
740
741 static int find_and_copy_seed(struct btrfs_fs_devices *seed,
742 struct btrfs_fs_devices *copy,
743 struct list_head *fs_uuids) {
744 struct btrfs_fs_devices *cur_fs;
745
746 list_for_each_entry(cur_fs, fs_uuids, list)
747 if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE))
748 return copy_fs_devices(copy, cur_fs);
749
750 return 1;
751 }
752
753 static int map_seed_devices(struct list_head *all_uuids,
754 char *search, int *found)
755 {
756 struct btrfs_fs_devices *cur_fs, *cur_seed;
757 struct btrfs_fs_devices *fs_copy, *seed_copy;
758 struct btrfs_fs_devices *opened_fs;
759 struct btrfs_device *device;
760 struct btrfs_fs_info *fs_info;
761 struct list_head *fs_uuids;
762 int ret = 0;
763
764 fs_uuids = btrfs_scanned_uuids();
765
766 /*
767 * The fs_uuids list is global, and open_ctree_* will
768 * modify it, make a private copy here
769 */
770 list_for_each_entry(cur_fs, fs_uuids, list) {
771 /* don't bother handle all fs, if search target specified */
772 if (search) {
773 if (uuid_search(cur_fs, search) == 0)
774 continue;
775 *found = 1;
776 }
777
778 /* skip all fs already shown as mounted fs */
779 if (is_seen_fsid(cur_fs->fsid))
780 continue;
781
782 fs_copy = malloc(sizeof(*fs_copy));
783 if (!fs_copy) {
784 ret = -ENOMEM;
785 goto out;
786 }
787
788 ret = copy_fs_devices(fs_copy, cur_fs);
789 if (ret) {
790 free(fs_copy);
791 goto out;
792 }
793
794 list_add(&fs_copy->list, all_uuids);
795 }
796
797 list_for_each_entry(cur_fs, all_uuids, list) {
798 device = list_first_entry(&cur_fs->devices,
799 struct btrfs_device, dev_list);
800 if (!device)
801 continue;
802 /*
803 * open_ctree_* detects seed/sprout mapping
804 */
805 fs_info = open_ctree_fs_info(device->name, 0, 0,
806 OPEN_CTREE_PARTIAL);
807 if (!fs_info)
808 continue;
809
810 /*
811 * copy the seed chain under the opened fs
812 */
813 opened_fs = fs_info->fs_devices;
814 cur_seed = cur_fs;
815 while (opened_fs->seed) {
816 seed_copy = malloc(sizeof(*seed_copy));
817 if (!seed_copy) {
818 ret = -ENOMEM;
819 goto fail_out;
820 }
821 ret = find_and_copy_seed(opened_fs->seed, seed_copy,
822 fs_uuids);
823 if (ret) {
824 free(seed_copy);
825 goto fail_out;
826 }
827
828 cur_seed->seed = seed_copy;
829
830 opened_fs = opened_fs->seed;
831 cur_seed = cur_seed->seed;
832 }
833
834 close_ctree(fs_info->chunk_root);
835 }
836
837 out:
838 return ret;
839 fail_out:
840 close_ctree(fs_info->chunk_root);
841 goto out;
842 }
843
844 static const char * const cmd_show_usage[] = {
845 "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
846 "Show the structure of a filesystem",
847 "-d|--all-devices show only disks under /dev containing btrfs filesystem",
848 "-m|--mounted show only mounted btrfs",
849 "If no argument is given, structure of all present filesystems is shown.",
850 NULL
851 };
852
853 static int cmd_show(int argc, char **argv)
854 {
855 LIST_HEAD(all_uuids);
856 struct btrfs_fs_devices *fs_devices;
857 char *search = NULL;
858 int ret;
859 /* default, search both kernel and udev */
860 int where = -1;
861 int type = 0;
862 char mp[BTRFS_PATH_NAME_MAX + 1];
863 char path[PATH_MAX];
864 __u8 fsid[BTRFS_FSID_SIZE];
865 char uuid_buf[BTRFS_UUID_UNPARSED_SIZE];
866 int found = 0;
867
868 while (1) {
869 int long_index;
870 static struct option long_options[] = {
871 { "all-devices", no_argument, NULL, 'd'},
872 { "mounted", no_argument, NULL, 'm'},
873 { NULL, no_argument, NULL, 0 },
874 };
875 int c = getopt_long(argc, argv, "dm", long_options,
876 &long_index);
877 if (c < 0)
878 break;
879 switch (c) {
880 case 'd':
881 where = BTRFS_SCAN_LBLKID;
882 break;
883 case 'm':
884 where = BTRFS_SCAN_MOUNTED;
885 break;
886 default:
887 usage(cmd_show_usage);
888 }
889 }
890
891 if (check_argc_max(argc, optind + 1))
892 usage(cmd_show_usage);
893
894 if (argc > optind) {
895 search = argv[optind];
896 if (strlen(search) == 0)
897 usage(cmd_show_usage);
898 type = check_arg_type(search);
899 /*
900 * needs spl handling if input arg is block dev
901 * And if input arg is mount-point just print it
902 * right away
903 */
904 if (type == BTRFS_ARG_BLKDEV) {
905 if (where == BTRFS_SCAN_LBLKID) {
906 /* we need to do this because
907 * legacy BTRFS_SCAN_DEV
908 * provides /dev/dm-x paths
909 */
910 if (realpath(search, path))
911 search = path;
912 } else {
913 ret = get_btrfs_mount(search,
914 mp, sizeof(mp));
915 if (!ret) {
916 /* given block dev is mounted*/
917 search = mp;
918 type = BTRFS_ARG_MNTPOINT;
919 } else {
920 ret = dev_to_fsid(search, fsid);
921 if (ret) {
922 fprintf(stderr,
923 "ERROR: No btrfs on %s\n",
924 search);
925 return 1;
926 }
927 uuid_unparse(fsid, uuid_buf);
928 search = uuid_buf;
929 type = BTRFS_ARG_UUID;
930 goto devs_only;
931 }
932 }
933 }
934 }
935
936 if (where == BTRFS_SCAN_LBLKID)
937 goto devs_only;
938
939 /* show mounted btrfs */
940 ret = btrfs_scan_kernel(search);
941 if (search && !ret) {
942 /* since search is found we are done */
943 goto out;
944 }
945
946 /* shows mounted only */
947 if (where == BTRFS_SCAN_MOUNTED)
948 goto out;
949
950 devs_only:
951 ret = btrfs_scan_lblkid();
952
953 if (ret) {
954 fprintf(stderr, "ERROR: %d while scanning\n", ret);
955 return 1;
956 }
957
958 /*
959 * scan_for_btrfs() don't build seed/sprout mapping,
960 * do mapping build for each scanned fs here
961 */
962 ret = map_seed_devices(&all_uuids, search, &found);
963 if (ret) {
964 fprintf(stderr,
965 "ERROR: %d while mapping seed devices\n", ret);
966 return 1;
967 }
968
969 list_for_each_entry(fs_devices, &all_uuids, list)
970 print_one_uuid(fs_devices);
971
972 if (search && !found)
973 ret = 1;
974
975 while (!list_empty(&all_uuids)) {
976 fs_devices = list_entry(all_uuids.next,
977 struct btrfs_fs_devices, list);
978 free_fs_devices(fs_devices);
979 }
980 out:
981 printf("%s\n", BTRFS_BUILD_VERSION);
982 free_seen_fsid();
983 return ret;
984 }
985
986 static const char * const cmd_sync_usage[] = {
987 "btrfs filesystem sync <path>",
988 "Force a sync on a filesystem",
989 NULL
990 };
991
992 static int cmd_sync(int argc, char **argv)
993 {
994 int fd, res, e;
995 char *path;
996 DIR *dirstream = NULL;
997
998 if (check_argc_exact(argc, 2))
999 usage(cmd_sync_usage);
1000
1001 path = argv[1];
1002
1003 fd = open_file_or_dir(path, &dirstream);
1004 if (fd < 0) {
1005 fprintf(stderr, "ERROR: can't access '%s'\n", path);
1006 return 1;
1007 }
1008
1009 printf("FSSync '%s'\n", path);
1010 res = ioctl(fd, BTRFS_IOC_SYNC);
1011 e = errno;
1012 close_file_or_dir(fd, dirstream);
1013 if( res < 0 ){
1014 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
1015 path, strerror(e));
1016 return 1;
1017 }
1018
1019 return 0;
1020 }
1021
1022 static int parse_compress_type(char *s)
1023 {
1024 if (strcmp(optarg, "zlib") == 0)
1025 return BTRFS_COMPRESS_ZLIB;
1026 else if (strcmp(optarg, "lzo") == 0)
1027 return BTRFS_COMPRESS_LZO;
1028 else {
1029 fprintf(stderr, "Unknown compress type %s\n", s);
1030 exit(1);
1031 };
1032 }
1033
1034 static const char * const cmd_defrag_usage[] = {
1035 "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
1036 "Defragment a file or a directory",
1037 "",
1038 "-v be verbose",
1039 "-r defragment files recursively",
1040 "-c[zlib,lzo] compress the file while defragmenting",
1041 "-f flush data to disk immediately after defragmenting",
1042 "-s start defragment only from byte onward",
1043 "-l len defragment only up to len bytes",
1044 "-t size minimal size of file to be considered for defragmenting",
1045 NULL
1046 };
1047
1048 static int do_defrag(int fd, int fancy_ioctl,
1049 struct btrfs_ioctl_defrag_range_args *range)
1050 {
1051 int ret;
1052
1053 if (!fancy_ioctl)
1054 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
1055 else
1056 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
1057
1058 return ret;
1059 }
1060
1061 static int defrag_global_fancy_ioctl;
1062 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
1063 static int defrag_global_verbose;
1064 static int defrag_global_errors;
1065 static int defrag_callback(const char *fpath, const struct stat *sb,
1066 int typeflag, struct FTW *ftwbuf)
1067 {
1068 int ret = 0;
1069 int e = 0;
1070 int fd = 0;
1071
1072 if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) {
1073 if (defrag_global_verbose)
1074 printf("%s\n", fpath);
1075 fd = open(fpath, O_RDWR);
1076 e = errno;
1077 if (fd < 0)
1078 goto error;
1079 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
1080 e = errno;
1081 close(fd);
1082 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1083 fprintf(stderr, "ERROR: defrag range ioctl not "
1084 "supported in this kernel, please try "
1085 "without any options.\n");
1086 defrag_global_errors++;
1087 return ENOTTY;
1088 }
1089 if (ret)
1090 goto error;
1091 }
1092 return 0;
1093
1094 error:
1095 fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
1096 defrag_global_errors++;
1097 return 0;
1098 }
1099
1100 static int cmd_defrag(int argc, char **argv)
1101 {
1102 int fd;
1103 int flush = 0;
1104 u64 start = 0;
1105 u64 len = (u64)-1;
1106 u32 thresh = 0;
1107 int i;
1108 int recursive = 0;
1109 int ret = 0;
1110 struct btrfs_ioctl_defrag_range_args range;
1111 int e = 0;
1112 int compress_type = BTRFS_COMPRESS_NONE;
1113 DIR *dirstream;
1114
1115 defrag_global_errors = 0;
1116 defrag_global_verbose = 0;
1117 defrag_global_errors = 0;
1118 defrag_global_fancy_ioctl = 0;
1119 optind = 1;
1120 while(1) {
1121 int c = getopt(argc, argv, "vrc::fs:l:t:");
1122 if (c < 0)
1123 break;
1124
1125 switch(c) {
1126 case 'c':
1127 compress_type = BTRFS_COMPRESS_ZLIB;
1128 if (optarg)
1129 compress_type = parse_compress_type(optarg);
1130 defrag_global_fancy_ioctl = 1;
1131 break;
1132 case 'f':
1133 flush = 1;
1134 defrag_global_fancy_ioctl = 1;
1135 break;
1136 case 'v':
1137 defrag_global_verbose = 1;
1138 break;
1139 case 's':
1140 start = parse_size(optarg);
1141 defrag_global_fancy_ioctl = 1;
1142 break;
1143 case 'l':
1144 len = parse_size(optarg);
1145 defrag_global_fancy_ioctl = 1;
1146 break;
1147 case 't':
1148 thresh = parse_size(optarg);
1149 defrag_global_fancy_ioctl = 1;
1150 break;
1151 case 'r':
1152 recursive = 1;
1153 break;
1154 default:
1155 usage(cmd_defrag_usage);
1156 }
1157 }
1158
1159 if (check_argc_min(argc - optind, 1))
1160 usage(cmd_defrag_usage);
1161
1162 memset(&defrag_global_range, 0, sizeof(range));
1163 defrag_global_range.start = start;
1164 defrag_global_range.len = len;
1165 defrag_global_range.extent_thresh = thresh;
1166 if (compress_type) {
1167 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
1168 defrag_global_range.compress_type = compress_type;
1169 }
1170 if (flush)
1171 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
1172
1173 for (i = optind; i < argc; i++) {
1174 struct stat st;
1175
1176 dirstream = NULL;
1177 fd = open_file_or_dir(argv[i], &dirstream);
1178 if (fd < 0) {
1179 fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
1180 strerror(errno));
1181 defrag_global_errors++;
1182 close_file_or_dir(fd, dirstream);
1183 continue;
1184 }
1185 if (fstat(fd, &st)) {
1186 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
1187 argv[i], strerror(errno));
1188 defrag_global_errors++;
1189 close_file_or_dir(fd, dirstream);
1190 continue;
1191 }
1192 if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
1193 fprintf(stderr,
1194 "ERROR: %s is not a directory or a regular file\n",
1195 argv[i]);
1196 defrag_global_errors++;
1197 close_file_or_dir(fd, dirstream);
1198 continue;
1199 }
1200 if (recursive) {
1201 if (S_ISDIR(st.st_mode)) {
1202 ret = nftw(argv[i], defrag_callback, 10,
1203 FTW_MOUNT | FTW_PHYS);
1204 if (ret == ENOTTY)
1205 exit(1);
1206 /* errors are handled in the callback */
1207 ret = 0;
1208 } else {
1209 if (defrag_global_verbose)
1210 printf("%s\n", argv[i]);
1211 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1212 &defrag_global_range);
1213 e = errno;
1214 }
1215 } else {
1216 if (defrag_global_verbose)
1217 printf("%s\n", argv[i]);
1218 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1219 &defrag_global_range);
1220 e = errno;
1221 }
1222 close_file_or_dir(fd, dirstream);
1223 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1224 fprintf(stderr, "ERROR: defrag range ioctl not "
1225 "supported in this kernel, please try "
1226 "without any options.\n");
1227 defrag_global_errors++;
1228 break;
1229 }
1230 if (ret) {
1231 fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
1232 argv[i], strerror(e));
1233 defrag_global_errors++;
1234 }
1235 }
1236 if (defrag_global_verbose)
1237 printf("%s\n", BTRFS_BUILD_VERSION);
1238 if (defrag_global_errors)
1239 fprintf(stderr, "total %d failures\n", defrag_global_errors);
1240
1241 return !!defrag_global_errors;
1242 }
1243
1244 static const char * const cmd_resize_usage[] = {
1245 "btrfs filesystem resize [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path>",
1246 "Resize a filesystem",
1247 "If 'max' is passed, the filesystem will occupy all available space",
1248 "on the device 'devid'.",
1249 "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
1250 NULL
1251 };
1252
1253 static int cmd_resize(int argc, char **argv)
1254 {
1255 struct btrfs_ioctl_vol_args args;
1256 int fd, res, len, e;
1257 char *amount, *path;
1258 DIR *dirstream = NULL;
1259
1260 if (check_argc_exact(argc, 3))
1261 usage(cmd_resize_usage);
1262
1263 amount = argv[1];
1264 path = argv[2];
1265
1266 len = strlen(amount);
1267 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
1268 fprintf(stderr, "ERROR: size value too long ('%s)\n",
1269 amount);
1270 return 1;
1271 }
1272
1273 fd = open_file_or_dir(path, &dirstream);
1274 if (fd < 0) {
1275 fprintf(stderr, "ERROR: can't access '%s'\n", path);
1276 return 1;
1277 }
1278
1279 printf("Resize '%s' of '%s'\n", path, amount);
1280 strncpy_null(args.name, amount);
1281 res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
1282 e = errno;
1283 close_file_or_dir(fd, dirstream);
1284 if( res < 0 ){
1285 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
1286 path, strerror(e));
1287 return 1;
1288 }
1289 return 0;
1290 }
1291
1292 static const char * const cmd_label_usage[] = {
1293 "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
1294 "Get or change the label of a filesystem",
1295 "With one argument, get the label of filesystem on <device>.",
1296 "If <newlabel> is passed, set the filesystem label to <newlabel>.",
1297 NULL
1298 };
1299
1300 static int cmd_label(int argc, char **argv)
1301 {
1302 if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
1303 usage(cmd_label_usage);
1304
1305 if (argc > 2) {
1306 return set_label(argv[1], argv[2]);
1307 } else {
1308 char label[BTRFS_LABEL_SIZE];
1309 int ret;
1310
1311 ret = get_label(argv[1], label);
1312 if (!ret)
1313 fprintf(stdout, "%s\n", label);
1314
1315 return ret;
1316 }
1317 }
1318
1319 const struct cmd_group filesystem_cmd_group = {
1320 filesystem_cmd_group_usage, NULL, {
1321 { "df", cmd_df, cmd_df_usage, NULL, 0 },
1322 { "show", cmd_show, cmd_show_usage, NULL, 0 },
1323 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
1324 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
1325 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
1326 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
1327 { "label", cmd_label, cmd_label_usage, NULL, 0 },
1328 NULL_CMD_STRUCT
1329 }
1330 };
1331
1332 int cmd_filesystem(int argc, char **argv)
1333 {
1334 return handle_command_group(&filesystem_cmd_group, argc, argv);
1335 }
(deprecated) Btrfs progs developments and patch integration