?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
btrfs-progs: fix wrong data ratio for raid56 in btrfs-file-usage
[btrfs-progs-unstable/devel.git] / cmds-filesystem.c
blob0bf24ffb39cb8ffcffc63b509da3502f7a866c06
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 "cmds-fi-disk_usage.h"
40 #include "list_sort.h"
41 #include "disk-io.h"
42
43
44 /*
45 * for btrfs fi show, we maintain a hash of fsids we've already printed.
46 * This way we don't print dups if a given FS is mounted more than once.
47 */
48 #define SEEN_FSID_HASH_SIZE 256
49
50 struct seen_fsid {
51 u8 fsid[BTRFS_FSID_SIZE];
52 struct seen_fsid *next;
53 };
54
55 static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
56
57 static int is_seen_fsid(u8 *fsid)
58 {
59 u8 hash = fsid[0];
60 int slot = hash % SEEN_FSID_HASH_SIZE;
61 struct seen_fsid *seen = seen_fsid_hash[slot];
62
63 return seen ? 1 : 0;
64 }
65
66 static int add_seen_fsid(u8 *fsid)
67 {
68 u8 hash = fsid[0];
69 int slot = hash % SEEN_FSID_HASH_SIZE;
70 struct seen_fsid *seen = seen_fsid_hash[slot];
71 struct seen_fsid *alloc;
72
73 if (!seen)
74 goto insert;
75
76 while (1) {
77 if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
78 return -EEXIST;
79
80 if (!seen->next)
81 break;
82
83 seen = seen->next;
84 }
85
86 insert:
87
88 alloc = malloc(sizeof(*alloc));
89 if (!alloc)
90 return -ENOMEM;
91
92 alloc->next = NULL;
93 memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
94
95 if (seen)
96 seen->next = alloc;
97 else
98 seen_fsid_hash[slot] = alloc;
99
100 return 0;
101 }
102
103 static void free_seen_fsid(void)
104 {
105 int slot;
106 struct seen_fsid *seen;
107 struct seen_fsid *next;
108
109 for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
110 seen = seen_fsid_hash[slot];
111 while (seen) {
112 next = seen->next;
113 free(seen);
114 seen = next;
115 }
116 seen_fsid_hash[slot] = NULL;
117 }
118 }
119
120 static const char * const filesystem_cmd_group_usage[] = {
121 "btrfs filesystem [<group>] <command> [<args>]",
122 NULL
123 };
124
125 static const char * const cmd_filesystem_df_usage[] = {
126 "btrfs filesystem df [options] <path>",
127 "Show space usage information for a mount point",
128 "-b|--raw raw numbers in bytes",
129 "-h human friendly numbers, base 1024 (default)",
130 "-H human friendly numbers, base 1000",
131 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)",
132 "--si use 1000 as a base (kB, MB, GB, TB)",
133 "-k|--kbytes show sizes in KiB, or kB with --si",
134 "-m|--mbytes show sizes in MiB, or MB with --si",
135 "-g|--gbytes show sizes in GiB, or GB with --si",
136 "-t|--tbytes show sizes in TiB, or TB with --si",
137 NULL
138 };
139
140 static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
141 {
142 u64 count = 0;
143 int ret, e;
144 struct btrfs_ioctl_space_args *sargs;
145
146 sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
147 if (!sargs)
148 return -ENOMEM;
149
150 sargs->space_slots = 0;
151 sargs->total_spaces = 0;
152
153 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
154 e = errno;
155 if (ret) {
156 fprintf(stderr, "ERROR: couldn't get space info - %s\n",
157 strerror(e));
158 free(sargs);
159 return -e;
160 }
161 /* This really should never happen */
162 if (!sargs->total_spaces) {
163 free(sargs);
164 return -ENOENT;
165 }
166 count = sargs->total_spaces;
167 free(sargs);
168
169 sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
170 (count * sizeof(struct btrfs_ioctl_space_info)));
171 if (!sargs)
172 return -ENOMEM;
173
174 sargs->space_slots = count;
175 sargs->total_spaces = 0;
176 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
177 e = errno;
178 if (ret) {
179 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
180 count, strerror(e));
181 free(sargs);
182 return -e;
183 }
184 *sargs_ret = sargs;
185 return 0;
186 }
187
188 static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode)
189 {
190 u64 i;
191 struct btrfs_ioctl_space_info *sp = sargs->spaces;
192
193 for (i = 0; i < sargs->total_spaces; i++, sp++) {
194 printf("%s, %s: total=%s, used=%s\n",
195 btrfs_group_type_str(sp->flags),
196 btrfs_group_profile_str(sp->flags),
197 pretty_size_mode(sp->total_bytes, unit_mode),
198 pretty_size_mode(sp->used_bytes, unit_mode));
199 }
200 }
201
202 static int cmd_filesystem_df(int argc, char **argv)
203 {
204 struct btrfs_ioctl_space_args *sargs = NULL;
205 int ret;
206 int fd;
207 char *path;
208 DIR *dirstream = NULL;
209 unsigned unit_mode = UNITS_DEFAULT;
210
211 while (1) {
212 int long_index;
213 static const struct option long_options[] = {
214 { "raw", no_argument, NULL, 'b'},
215 { "kbytes", no_argument, NULL, 'k'},
216 { "mbytes", no_argument, NULL, 'm'},
217 { "gbytes", no_argument, NULL, 'g'},
218 { "tbytes", no_argument, NULL, 't'},
219 { "si", no_argument, NULL, 256},
220 { "iec", no_argument, NULL, 257},
221 };
222 int c = getopt_long(argc, argv, "bhHkmgt", long_options,
223 &long_index);
224 if (c < 0)
225 break;
226 switch (c) {
227 case 'b':
228 unit_mode = UNITS_RAW;
229 break;
230 case 'k':
231 units_set_base(&unit_mode, UNITS_KBYTES);
232 break;
233 case 'm':
234 units_set_base(&unit_mode, UNITS_MBYTES);
235 break;
236 case 'g':
237 units_set_base(&unit_mode, UNITS_GBYTES);
238 break;
239 case 't':
240 units_set_base(&unit_mode, UNITS_TBYTES);
241 break;
242 case 'h':
243 unit_mode = UNITS_HUMAN_BINARY;
244 break;
245 case 'H':
246 unit_mode = UNITS_HUMAN_DECIMAL;
247 break;
248 case 256:
249 units_set_mode(&unit_mode, UNITS_DECIMAL);
250 break;
251 case 257:
252 units_set_mode(&unit_mode, UNITS_BINARY);
253 break;
254 default:
255 usage(cmd_filesystem_df_usage);
256 }
257 }
258
259 if (check_argc_exact(argc, optind + 1))
260 usage(cmd_filesystem_df_usage);
261
262 path = argv[optind];
263
264 fd = open_file_or_dir(path, &dirstream);
265 if (fd < 0) {
266 fprintf(stderr, "ERROR: can't access '%s'\n", path);
267 return 1;
268 }
269 ret = get_df(fd, &sargs);
270
271 if (ret == 0) {
272 print_df(sargs, unit_mode);
273 free(sargs);
274 } else {
275 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret));
276 }
277
278 close_file_or_dir(fd, dirstream);
279 return !!ret;
280 }
281
282 static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label,
283 char *search)
284 {
285 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
286 int search_len = strlen(search);
287
288 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
289 uuid_unparse(fsid, uuidbuf);
290 if (!strncmp(uuidbuf, search, search_len))
291 return 1;
292
293 if (strlen(label) && strcmp(label, search) == 0)
294 return 1;
295
296 if (strcmp(mnt, search) == 0)
297 return 1;
298
299 return 0;
300 }
301
302 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
303 {
304 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
305 struct list_head *cur;
306 struct btrfs_device *device;
307 int search_len = strlen(search);
308
309 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
310 uuid_unparse(fs_devices->fsid, uuidbuf);
311 if (!strncmp(uuidbuf, search, search_len))
312 return 1;
313
314 list_for_each(cur, &fs_devices->devices) {
315 device = list_entry(cur, struct btrfs_device, dev_list);
316 if ((device->label && strcmp(device->label, search) == 0) ||
317 strcmp(device->name, search) == 0)
318 return 1;
319 }
320 return 0;
321 }
322
323 /*
324 * Sort devices by devid, ascending
325 */
326 static int cmp_device_id(void *priv, struct list_head *a,
327 struct list_head *b)
328 {
329 const struct btrfs_device *da = list_entry(a, struct btrfs_device,
330 dev_list);
331 const struct btrfs_device *db = list_entry(b, struct btrfs_device,
332 dev_list);
333
334 return da->devid < db->devid ? -1 :
335 da->devid > db->devid ? 1 : 0;
336 }
337
338 static void splice_device_list(struct list_head *seed_devices,
339 struct list_head *all_devices)
340 {
341 struct btrfs_device *in_all, *next_all;
342 struct btrfs_device *in_seed, *next_seed;
343
344 list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) {
345 list_for_each_entry_safe(in_seed, next_seed, seed_devices,
346 dev_list) {
347 if (in_all->devid == in_seed->devid) {
348 /*
349 * When do dev replace in a sprout fs
350 * to a dev in its seed fs, the replacing
351 * dev will reside in the sprout fs and
352 * the replaced dev will still exist
353 * in the seed fs.
354 * So pick the latest one when showing
355 * the sprout fs.
356 */
357 if (in_all->generation
358 < in_seed->generation) {
359 list_del(&in_all->dev_list);
360 free(in_all);
361 } else if (in_all->generation
362 > in_seed->generation) {
363 list_del(&in_seed->dev_list);
364 free(in_seed);
365 }
366 break;
367 }
368 }
369 }
370
371 list_splice(seed_devices, all_devices);
372 }
373
374 static void print_devices(struct btrfs_fs_devices *fs_devices,
375 u64 *devs_found)
376 {
377 struct btrfs_device *device;
378 struct btrfs_fs_devices *cur_fs;
379 struct list_head *all_devices;
380
381 all_devices = &fs_devices->devices;
382 cur_fs = fs_devices->seed;
383 /* add all devices of seed fs to the fs to be printed */
384 while (cur_fs) {
385 splice_device_list(&cur_fs->devices, all_devices);
386 cur_fs = cur_fs->seed;
387 }
388
389 list_sort(NULL, all_devices, cmp_device_id);
390 list_for_each_entry(device, all_devices, dev_list) {
391 printf("\tdevid %4llu size %s used %s path %s\n",
392 (unsigned long long)device->devid,
393 pretty_size(device->total_bytes),
394 pretty_size(device->bytes_used), device->name);
395
396 (*devs_found)++;
397 }
398 }
399
400 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
401 {
402 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
403 struct btrfs_device *device;
404 u64 devs_found = 0;
405 u64 total;
406
407 if (add_seen_fsid(fs_devices->fsid))
408 return;
409
410 uuid_unparse(fs_devices->fsid, uuidbuf);
411 device = list_entry(fs_devices->devices.next, struct btrfs_device,
412 dev_list);
413 if (device->label && device->label[0])
414 printf("Label: '%s' ", device->label);
415 else
416 printf("Label: none ");
417
418 total = device->total_devs;
419 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
420 (unsigned long long)total,
421 pretty_size(device->super_bytes_used));
422
423 print_devices(fs_devices, &devs_found);
424
425 if (devs_found < total) {
426 printf("\t*** Some devices missing\n");
427 }
428 printf("\n");
429 }
430
431 /* adds up all the used spaces as reported by the space info ioctl
432 */
433 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
434 {
435 u64 ret = 0;
436 int i;
437 for (i = 0; i < si->total_spaces; i++)
438 ret += si->spaces[i].used_bytes;
439 return ret;
440 }
441
442 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
443 struct btrfs_ioctl_dev_info_args *dev_info,
444 struct btrfs_ioctl_space_args *space_info,
445 char *label, char *path)
446 {
447 int i;
448 int fd;
449 int missing = 0;
450 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
451 struct btrfs_ioctl_dev_info_args *tmp_dev_info;
452 int ret;
453
454 ret = add_seen_fsid(fs_info->fsid);
455 if (ret == -EEXIST)
456 return 0;
457 else if (ret)
458 return ret;
459
460 uuid_unparse(fs_info->fsid, uuidbuf);
461 if (label && strlen(label))
462 printf("Label: '%s' ", label);
463 else
464 printf("Label: none ");
465
466 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
467 fs_info->num_devices,
468 pretty_size(calc_used_bytes(space_info)));
469
470 for (i = 0; i < fs_info->num_devices; i++) {
471 char *canonical_path;
472
473 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
474 canonical_path = canonicalize_path((char *)tmp_dev_info->path);
475
476 /* Add check for missing devices even mounted */
477 fd = open((char *)tmp_dev_info->path, O_RDONLY);
478 if (fd < 0) {
479 missing = 1;
480 continue;
481 }
482 close(fd);
483 printf("\tdevid %4llu size %s used %s path %s\n",
484 tmp_dev_info->devid,
485 pretty_size(tmp_dev_info->total_bytes),
486 pretty_size(tmp_dev_info->bytes_used),
487 canonical_path);
488
489 free(canonical_path);
490 }
491
492 if (missing)
493 printf("\t*** Some devices missing\n");
494 printf("\n");
495 return 0;
496 }
497
498 /* This function checks if the given input parameter is
499 * an uuid or a path
500 * return -1: some error in the given input
501 * return 0: unknow input
502 * return 1: given input is uuid
503 * return 2: given input is path
504 */
505 static int check_arg_type(char *input)
506 {
507 uuid_t out;
508 char path[PATH_MAX];
509
510 if (!input)
511 return -EINVAL;
512
513 if (realpath(input, path)) {
514 if (is_block_device(path) == 1)
515 return BTRFS_ARG_BLKDEV;
516
517 if (is_mount_point(path) == 1)
518 return BTRFS_ARG_MNTPOINT;
519
520 return BTRFS_ARG_UNKNOWN;
521 }
522
523 if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
524 !uuid_parse(input, out))
525 return BTRFS_ARG_UUID;
526
527 return BTRFS_ARG_UNKNOWN;
528 }
529
530 static int btrfs_scan_kernel(void *search)
531 {
532 int ret = 0, fd;
533 int found = 0;
534 FILE *f;
535 struct mntent *mnt;
536 struct btrfs_ioctl_fs_info_args fs_info_arg;
537 struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
538 struct btrfs_ioctl_space_args *space_info_arg = NULL;
539 char label[BTRFS_LABEL_SIZE];
540
541 f = setmntent("/proc/self/mounts", "r");
542 if (f == NULL)
543 return 1;
544
545 memset(label, 0, sizeof(label));
546 while ((mnt = getmntent(f)) != NULL) {
547 if (strcmp(mnt->mnt_type, "btrfs"))
548 continue;
549 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
550 &dev_info_arg);
551 if (ret)
552 goto out;
553
554 if (get_label_mounted(mnt->mnt_dir, label)) {
555 kfree(dev_info_arg);
556 goto out;
557 }
558 if (search && !match_search_item_kernel(fs_info_arg.fsid,
559 mnt->mnt_dir, label, search)) {
560 kfree(dev_info_arg);
561 continue;
562 }
563
564 fd = open(mnt->mnt_dir, O_RDONLY);
565 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
566 print_one_fs(&fs_info_arg, dev_info_arg,
567 space_info_arg, label, mnt->mnt_dir);
568 kfree(space_info_arg);
569 memset(label, 0, sizeof(label));
570 found = 1;
571 }
572 if (fd != -1)
573 close(fd);
574 kfree(dev_info_arg);
575 }
576
577 out:
578 endmntent(f);
579 return !found;
580 }
581
582 static int dev_to_fsid(char *dev, __u8 *fsid)
583 {
584 struct btrfs_super_block *disk_super;
585 char *buf;
586 int ret;
587 int fd;
588
589 buf = malloc(4096);
590 if (!buf)
591 return -ENOMEM;
592
593 fd = open(dev, O_RDONLY);
594 if (fd < 0) {
595 ret = -errno;
596 free(buf);
597 return ret;
598 }
599
600 disk_super = (struct btrfs_super_block *)buf;
601 ret = btrfs_read_dev_super(fd, disk_super,
602 BTRFS_SUPER_INFO_OFFSET, 0);
603 if (ret)
604 goto out;
605
606 memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE);
607 ret = 0;
608
609 out:
610 close(fd);
611 free(buf);
612 return ret;
613 }
614
615 static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
616 {
617 struct btrfs_fs_devices *cur_seed, *next_seed;
618 struct btrfs_device *device;
619
620 while (!list_empty(&fs_devices->devices)) {
621 device = list_entry(fs_devices->devices.next,
622 struct btrfs_device, dev_list);
623 list_del(&device->dev_list);
624
625 free(device->name);
626 free(device->label);
627 free(device);
628 }
629
630 /* free seed fs chain */
631 cur_seed = fs_devices->seed;
632 fs_devices->seed = NULL;
633 while (cur_seed) {
634 next_seed = cur_seed->seed;
635 free(cur_seed);
636
637 cur_seed = next_seed;
638 }
639
640 list_del(&fs_devices->list);
641 free(fs_devices);
642 }
643
644 static int copy_device(struct btrfs_device *dst,
645 struct btrfs_device *src)
646 {
647 dst->devid = src->devid;
648 memcpy(dst->uuid, src->uuid, BTRFS_UUID_SIZE);
649 if (src->name == NULL)
650 dst->name = NULL;
651 else {
652 dst->name = strdup(src->name);
653 if (!dst->name)
654 return -ENOMEM;
655 }
656 if (src->label == NULL)
657 dst->label = NULL;
658 else {
659 dst->label = strdup(src->label);
660 if (!dst->label) {
661 free(dst->name);
662 return -ENOMEM;
663 }
664 }
665 dst->total_devs = src->total_devs;
666 dst->super_bytes_used = src->super_bytes_used;
667 dst->total_bytes = src->total_bytes;
668 dst->bytes_used = src->bytes_used;
669 dst->generation = src->generation;
670
671 return 0;
672 }
673
674 static int copy_fs_devices(struct btrfs_fs_devices *dst,
675 struct btrfs_fs_devices *src)
676 {
677 struct btrfs_device *cur_dev, *dev_copy;
678 int ret = 0;
679
680 memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE);
681 INIT_LIST_HEAD(&dst->devices);
682 dst->seed = NULL;
683
684 list_for_each_entry(cur_dev, &src->devices, dev_list) {
685 dev_copy = malloc(sizeof(*dev_copy));
686 if (!dev_copy) {
687 ret = -ENOMEM;
688 break;
689 }
690
691 ret = copy_device(dev_copy, cur_dev);
692 if (ret) {
693 free(dev_copy);
694 break;
695 }
696
697 list_add(&dev_copy->dev_list, &dst->devices);
698 dev_copy->fs_devices = dst;
699 }
700
701 return ret;
702 }
703
704 static int find_and_copy_seed(struct btrfs_fs_devices *seed,
705 struct btrfs_fs_devices *copy,
706 struct list_head *fs_uuids) {
707 struct btrfs_fs_devices *cur_fs;
708
709 list_for_each_entry(cur_fs, fs_uuids, list)
710 if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE))
711 return copy_fs_devices(copy, cur_fs);
712
713 return 1;
714 }
715
716 static int map_seed_devices(struct list_head *all_uuids,
717 char *search, int *found)
718 {
719 struct btrfs_fs_devices *cur_fs, *cur_seed;
720 struct btrfs_fs_devices *fs_copy, *seed_copy;
721 struct btrfs_fs_devices *opened_fs;
722 struct btrfs_device *device;
723 struct btrfs_fs_info *fs_info;
724 struct list_head *fs_uuids;
725 int ret = 0;
726
727 fs_uuids = btrfs_scanned_uuids();
728
729 /*
730 * The fs_uuids list is global, and open_ctree_* will
731 * modify it, make a private copy here
732 */
733 list_for_each_entry(cur_fs, fs_uuids, list) {
734 /* don't bother handle all fs, if search target specified */
735 if (search) {
736 if (uuid_search(cur_fs, search) == 0)
737 continue;
738 *found = 1;
739 }
740
741 /* skip all fs already shown as mounted fs */
742 if (is_seen_fsid(cur_fs->fsid))
743 continue;
744
745 fs_copy = malloc(sizeof(*fs_copy));
746 if (!fs_copy) {
747 ret = -ENOMEM;
748 goto out;
749 }
750
751 ret = copy_fs_devices(fs_copy, cur_fs);
752 if (ret) {
753 free(fs_copy);
754 goto out;
755 }
756
757 list_add(&fs_copy->list, all_uuids);
758 }
759
760 list_for_each_entry(cur_fs, all_uuids, list) {
761 device = list_first_entry(&cur_fs->devices,
762 struct btrfs_device, dev_list);
763 if (!device)
764 continue;
765 /*
766 * open_ctree_* detects seed/sprout mapping
767 */
768 fs_info = open_ctree_fs_info(device->name, 0, 0,
769 OPEN_CTREE_PARTIAL);
770 if (!fs_info)
771 continue;
772
773 /*
774 * copy the seed chain under the opened fs
775 */
776 opened_fs = fs_info->fs_devices;
777 cur_seed = cur_fs;
778 while (opened_fs->seed) {
779 seed_copy = malloc(sizeof(*seed_copy));
780 if (!seed_copy) {
781 ret = -ENOMEM;
782 goto fail_out;
783 }
784 ret = find_and_copy_seed(opened_fs->seed, seed_copy,
785 fs_uuids);
786 if (ret) {
787 free(seed_copy);
788 goto fail_out;
789 }
790
791 cur_seed->seed = seed_copy;
792
793 opened_fs = opened_fs->seed;
794 cur_seed = cur_seed->seed;
795 }
796
797 close_ctree(fs_info->chunk_root);
798 }
799
800 out:
801 return ret;
802 fail_out:
803 close_ctree(fs_info->chunk_root);
804 goto out;
805 }
806
807 static const char * const cmd_show_usage[] = {
808 "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
809 "Show the structure of a filesystem",
810 "-d|--all-devices show only disks under /dev containing btrfs filesystem",
811 "-m|--mounted show only mounted btrfs",
812 "If no argument is given, structure of all present filesystems is shown.",
813 NULL
814 };
815
816 static int cmd_show(int argc, char **argv)
817 {
818 LIST_HEAD(all_uuids);
819 struct btrfs_fs_devices *fs_devices;
820 char *search = NULL;
821 int ret;
822 /* default, search both kernel and udev */
823 int where = -1;
824 int type = 0;
825 char mp[BTRFS_PATH_NAME_MAX + 1];
826 char path[PATH_MAX];
827 __u8 fsid[BTRFS_FSID_SIZE];
828 char uuid_buf[BTRFS_UUID_UNPARSED_SIZE];
829 int found = 0;
830
831 while (1) {
832 int long_index;
833 static struct option long_options[] = {
834 { "all-devices", no_argument, NULL, 'd'},
835 { "mounted", no_argument, NULL, 'm'},
836 { NULL, no_argument, NULL, 0 },
837 };
838 int c = getopt_long(argc, argv, "dm", long_options,
839 &long_index);
840 if (c < 0)
841 break;
842 switch (c) {
843 case 'd':
844 where = BTRFS_SCAN_LBLKID;
845 break;
846 case 'm':
847 where = BTRFS_SCAN_MOUNTED;
848 break;
849 default:
850 usage(cmd_show_usage);
851 }
852 }
853
854 if (check_argc_max(argc, optind + 1))
855 usage(cmd_show_usage);
856
857 if (argc > optind) {
858 search = argv[optind];
859 if (strlen(search) == 0)
860 usage(cmd_show_usage);
861 type = check_arg_type(search);
862
863 /*
864 * For search is a device:
865 * realpath do /dev/mapper/XX => /dev/dm-X
866 * which is required by BTRFS_SCAN_DEV
867 * For search is a mountpoint:
868 * realpath do /mnt/btrfs/ => /mnt/btrfs
869 * which shall be recognized by btrfs_scan_kernel()
870 */
871 if (!realpath(search, path)) {
872 fprintf(stderr, "ERROR: Could not show %s: %s\n",
873 search, strerror(errno));
874 return 1;
875 }
876
877 search = path;
878
879 /*
880 * Needs special handling if input arg is block dev And if
881 * input arg is mount-point just print it right away
882 */
883 if (type == BTRFS_ARG_BLKDEV && where != BTRFS_SCAN_LBLKID) {
884 ret = get_btrfs_mount(search, mp, sizeof(mp));
885 if (!ret) {
886 /* given block dev is mounted */
887 search = mp;
888 type = BTRFS_ARG_MNTPOINT;
889 } else {
890 ret = dev_to_fsid(search, fsid);
891 if (ret) {
892 fprintf(stderr,
893 "ERROR: No btrfs on %s\n",
894 search);
895 return 1;
896 }
897 uuid_unparse(fsid, uuid_buf);
898 search = uuid_buf;
899 type = BTRFS_ARG_UUID;
900 goto devs_only;
901 }
902 }
903 }
904
905 if (where == BTRFS_SCAN_LBLKID)
906 goto devs_only;
907
908 /* show mounted btrfs */
909 ret = btrfs_scan_kernel(search);
910 if (search && !ret) {
911 /* since search is found we are done */
912 goto out;
913 }
914
915 /* shows mounted only */
916 if (where == BTRFS_SCAN_MOUNTED)
917 goto out;
918
919 devs_only:
920 ret = btrfs_scan_lblkid();
921
922 if (ret) {
923 fprintf(stderr, "ERROR: %d while scanning\n", ret);
924 return 1;
925 }
926
927 /*
928 * scan_for_btrfs() don't build seed/sprout mapping,
929 * do mapping build for each scanned fs here
930 */
931 ret = map_seed_devices(&all_uuids, search, &found);
932 if (ret) {
933 fprintf(stderr,
934 "ERROR: %d while mapping seed devices\n", ret);
935 return 1;
936 }
937
938 list_for_each_entry(fs_devices, &all_uuids, list)
939 print_one_uuid(fs_devices);
940
941 if (search && !found)
942 ret = 1;
943
944 while (!list_empty(&all_uuids)) {
945 fs_devices = list_entry(all_uuids.next,
946 struct btrfs_fs_devices, list);
947 free_fs_devices(fs_devices);
948 }
949 out:
950 printf("%s\n", BTRFS_BUILD_VERSION);
951 free_seen_fsid();
952 return ret;
953 }
954
955 static const char * const cmd_sync_usage[] = {
956 "btrfs filesystem sync <path>",
957 "Force a sync on a filesystem",
958 NULL
959 };
960
961 static int cmd_sync(int argc, char **argv)
962 {
963 int fd, res, e;
964 char *path;
965 DIR *dirstream = NULL;
966
967 if (check_argc_exact(argc, 2))
968 usage(cmd_sync_usage);
969
970 path = argv[1];
971
972 fd = open_file_or_dir(path, &dirstream);
973 if (fd < 0) {
974 fprintf(stderr, "ERROR: can't access '%s'\n", path);
975 return 1;
976 }
977
978 printf("FSSync '%s'\n", path);
979 res = ioctl(fd, BTRFS_IOC_SYNC);
980 e = errno;
981 close_file_or_dir(fd, dirstream);
982 if( res < 0 ){
983 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
984 path, strerror(e));
985 return 1;
986 }
987
988 return 0;
989 }
990
991 static int parse_compress_type(char *s)
992 {
993 if (strcmp(optarg, "zlib") == 0)
994 return BTRFS_COMPRESS_ZLIB;
995 else if (strcmp(optarg, "lzo") == 0)
996 return BTRFS_COMPRESS_LZO;
997 else {
998 fprintf(stderr, "Unknown compress type %s\n", s);
999 exit(1);
1000 };
1001 }
1002
1003 static const char * const cmd_defrag_usage[] = {
1004 "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
1005 "Defragment a file or a directory",
1006 "",
1007 "-v be verbose",
1008 "-r defragment files recursively",
1009 "-c[zlib,lzo] compress the file while defragmenting",
1010 "-f flush data to disk immediately after defragmenting",
1011 "-s start defragment only from byte onward",
1012 "-l len defragment only up to len bytes",
1013 "-t size minimal size of file to be considered for defragmenting",
1014 NULL
1015 };
1016
1017 static int do_defrag(int fd, int fancy_ioctl,
1018 struct btrfs_ioctl_defrag_range_args *range)
1019 {
1020 int ret;
1021
1022 if (!fancy_ioctl)
1023 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
1024 else
1025 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
1026
1027 return ret;
1028 }
1029
1030 static int defrag_global_fancy_ioctl;
1031 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
1032 static int defrag_global_verbose;
1033 static int defrag_global_errors;
1034 static int defrag_callback(const char *fpath, const struct stat *sb,
1035 int typeflag, struct FTW *ftwbuf)
1036 {
1037 int ret = 0;
1038 int e = 0;
1039 int fd = 0;
1040
1041 if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) {
1042 if (defrag_global_verbose)
1043 printf("%s\n", fpath);
1044 fd = open(fpath, O_RDWR);
1045 e = errno;
1046 if (fd < 0)
1047 goto error;
1048 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
1049 e = errno;
1050 close(fd);
1051 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1052 fprintf(stderr, "ERROR: defrag range ioctl not "
1053 "supported in this kernel, please try "
1054 "without any options.\n");
1055 defrag_global_errors++;
1056 return ENOTTY;
1057 }
1058 if (ret)
1059 goto error;
1060 }
1061 return 0;
1062
1063 error:
1064 fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
1065 defrag_global_errors++;
1066 return 0;
1067 }
1068
1069 static int cmd_defrag(int argc, char **argv)
1070 {
1071 int fd;
1072 int flush = 0;
1073 u64 start = 0;
1074 u64 len = (u64)-1;
1075 u32 thresh = 0;
1076 int i;
1077 int recursive = 0;
1078 int ret = 0;
1079 struct btrfs_ioctl_defrag_range_args range;
1080 int e = 0;
1081 int compress_type = BTRFS_COMPRESS_NONE;
1082 DIR *dirstream;
1083
1084 defrag_global_errors = 0;
1085 defrag_global_verbose = 0;
1086 defrag_global_errors = 0;
1087 defrag_global_fancy_ioctl = 0;
1088 optind = 1;
1089 while(1) {
1090 int c = getopt(argc, argv, "vrc::fs:l:t:");
1091 if (c < 0)
1092 break;
1093
1094 switch(c) {
1095 case 'c':
1096 compress_type = BTRFS_COMPRESS_ZLIB;
1097 if (optarg)
1098 compress_type = parse_compress_type(optarg);
1099 defrag_global_fancy_ioctl = 1;
1100 break;
1101 case 'f':
1102 flush = 1;
1103 defrag_global_fancy_ioctl = 1;
1104 break;
1105 case 'v':
1106 defrag_global_verbose = 1;
1107 break;
1108 case 's':
1109 start = parse_size(optarg);
1110 defrag_global_fancy_ioctl = 1;
1111 break;
1112 case 'l':
1113 len = parse_size(optarg);
1114 defrag_global_fancy_ioctl = 1;
1115 break;
1116 case 't':
1117 thresh = parse_size(optarg);
1118 defrag_global_fancy_ioctl = 1;
1119 break;
1120 case 'r':
1121 recursive = 1;
1122 break;
1123 default:
1124 usage(cmd_defrag_usage);
1125 }
1126 }
1127
1128 if (check_argc_min(argc - optind, 1))
1129 usage(cmd_defrag_usage);
1130
1131 memset(&defrag_global_range, 0, sizeof(range));
1132 defrag_global_range.start = start;
1133 defrag_global_range.len = len;
1134 defrag_global_range.extent_thresh = thresh;
1135 if (compress_type) {
1136 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
1137 defrag_global_range.compress_type = compress_type;
1138 }
1139 if (flush)
1140 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
1141
1142 for (i = optind; i < argc; i++) {
1143 struct stat st;
1144
1145 dirstream = NULL;
1146 fd = open_file_or_dir(argv[i], &dirstream);
1147 if (fd < 0) {
1148 fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
1149 strerror(errno));
1150 defrag_global_errors++;
1151 close_file_or_dir(fd, dirstream);
1152 continue;
1153 }
1154 if (fstat(fd, &st)) {
1155 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
1156 argv[i], strerror(errno));
1157 defrag_global_errors++;
1158 close_file_or_dir(fd, dirstream);
1159 continue;
1160 }
1161 if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
1162 fprintf(stderr,
1163 "ERROR: %s is not a directory or a regular file\n",
1164 argv[i]);
1165 defrag_global_errors++;
1166 close_file_or_dir(fd, dirstream);
1167 continue;
1168 }
1169 if (recursive) {
1170 if (S_ISDIR(st.st_mode)) {
1171 ret = nftw(argv[i], defrag_callback, 10,
1172 FTW_MOUNT | FTW_PHYS);
1173 if (ret == ENOTTY)
1174 exit(1);
1175 /* errors are handled in the callback */
1176 ret = 0;
1177 } else {
1178 if (defrag_global_verbose)
1179 printf("%s\n", argv[i]);
1180 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1181 &defrag_global_range);
1182 e = errno;
1183 }
1184 } else {
1185 if (defrag_global_verbose)
1186 printf("%s\n", argv[i]);
1187 ret = do_defrag(fd, defrag_global_fancy_ioctl,
1188 &defrag_global_range);
1189 e = errno;
1190 }
1191 close_file_or_dir(fd, dirstream);
1192 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
1193 fprintf(stderr, "ERROR: defrag range ioctl not "
1194 "supported in this kernel, please try "
1195 "without any options.\n");
1196 defrag_global_errors++;
1197 break;
1198 }
1199 if (ret) {
1200 fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
1201 argv[i], strerror(e));
1202 defrag_global_errors++;
1203 }
1204 }
1205 if (defrag_global_verbose)
1206 printf("%s\n", BTRFS_BUILD_VERSION);
1207 if (defrag_global_errors)
1208 fprintf(stderr, "total %d failures\n", defrag_global_errors);
1209
1210 return !!defrag_global_errors;
1211 }
1212
1213 static const char * const cmd_resize_usage[] = {
1214 "btrfs filesystem resize [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path>",
1215 "Resize a filesystem",
1216 "If 'max' is passed, the filesystem will occupy all available space",
1217 "on the device 'devid'.",
1218 "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
1219 NULL
1220 };
1221
1222 static int cmd_resize(int argc, char **argv)
1223 {
1224 struct btrfs_ioctl_vol_args args;
1225 int fd, res, len, e;
1226 char *amount, *path;
1227 DIR *dirstream = NULL;
1228
1229 if (check_argc_exact(argc, 3))
1230 usage(cmd_resize_usage);
1231
1232 amount = argv[1];
1233 path = argv[2];
1234
1235 len = strlen(amount);
1236 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
1237 fprintf(stderr, "ERROR: size value too long ('%s)\n",
1238 amount);
1239 return 1;
1240 }
1241
1242 fd = open_file_or_dir(path, &dirstream);
1243 if (fd < 0) {
1244 fprintf(stderr, "ERROR: can't access '%s'\n", path);
1245 return 1;
1246 }
1247
1248 printf("Resize '%s' of '%s'\n", path, amount);
1249 strncpy_null(args.name, amount);
1250 res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
1251 e = errno;
1252 close_file_or_dir(fd, dirstream);
1253 if( res < 0 ){
1254 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
1255 path, strerror(e));
1256 return 1;
1257 }
1258 return 0;
1259 }
1260
1261 static const char * const cmd_label_usage[] = {
1262 "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
1263 "Get or change the label of a filesystem",
1264 "With one argument, get the label of filesystem on <device>.",
1265 "If <newlabel> is passed, set the filesystem label to <newlabel>.",
1266 NULL
1267 };
1268
1269 static int cmd_label(int argc, char **argv)
1270 {
1271 if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
1272 usage(cmd_label_usage);
1273
1274 if (argc > 2) {
1275 return set_label(argv[1], argv[2]);
1276 } else {
1277 char label[BTRFS_LABEL_SIZE];
1278 int ret;
1279
1280 ret = get_label(argv[1], label);
1281 if (!ret)
1282 fprintf(stdout, "%s\n", label);
1283
1284 return ret;
1285 }
1286 }
1287
1288 const struct cmd_group filesystem_cmd_group = {
1289 filesystem_cmd_group_usage, NULL, {
1290 { "df", cmd_filesystem_df, cmd_filesystem_df_usage, NULL, 0 },
1291 { "show", cmd_show, cmd_show_usage, NULL, 0 },
1292 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
1293 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
1294 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
1295 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
1296 { "label", cmd_label, cmd_label_usage, NULL, 0 },
1297 { "usage", cmd_filesystem_usage,
1298 cmd_filesystem_usage_usage, NULL, 0 },
1299
1300 NULL_CMD_STRUCT
1301 }
1302 };
1303
1304 int cmd_filesystem(int argc, char **argv)
1305 {
1306 return handle_command_group(&filesystem_cmd_group, argc, argv);
1307 }
(deprecated) Btrfs progs developments and patch integration