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Btrfs-progs: switch to arg_strtou64() part1
[btrfs-progs-unstable/devel.git] / cmds-filesystem.c
blob2b2d068e31515c9a7e83f36034789e12e9b8f3d0
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 add_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 struct seen_fsid *alloc;
62
63 if (!seen)
64 goto insert;
65
66 while (1) {
67 if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
68 return -EEXIST;
69
70 if (!seen->next)
71 break;
72
73 seen = seen->next;
74 }
75
76 insert:
77
78 alloc = malloc(sizeof(*alloc));
79 if (!alloc)
80 return -ENOMEM;
81
82 alloc->next = NULL;
83 memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
84
85 if (seen)
86 seen->next = alloc;
87 else
88 seen_fsid_hash[slot] = alloc;
89
90 return 0;
91 }
92
93 static void free_seen_fsid(void)
94 {
95 int slot;
96 struct seen_fsid *seen;
97 struct seen_fsid *next;
98
99 for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
100 seen = seen_fsid_hash[slot];
101 while (seen) {
102 next = seen->next;
103 free(seen);
104 seen = next;
105 }
106 seen_fsid_hash[slot] = NULL;
107 }
108 }
109
110 static const char * const filesystem_cmd_group_usage[] = {
111 "btrfs filesystem [<group>] <command> [<args>]",
112 NULL
113 };
114
115 static const char * const cmd_df_usage[] = {
116 "btrfs filesystem df <path>",
117 "Show space usage information for a mount point",
118 NULL
119 };
120
121 static char *group_type_str(u64 flag)
122 {
123 switch (flag & BTRFS_BLOCK_GROUP_TYPE_MASK) {
124 case BTRFS_BLOCK_GROUP_DATA:
125 return "Data";
126 case BTRFS_BLOCK_GROUP_SYSTEM:
127 return "System";
128 case BTRFS_BLOCK_GROUP_METADATA:
129 return "Metadata";
130 case BTRFS_BLOCK_GROUP_DATA|BTRFS_BLOCK_GROUP_METADATA:
131 return "Data+Metadata";
132 default:
133 return "unknown";
134 }
135 }
136
137 static char *group_profile_str(u64 flag)
138 {
139 switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
140 case 0:
141 return "single";
142 case BTRFS_BLOCK_GROUP_RAID0:
143 return "RAID0";
144 case BTRFS_BLOCK_GROUP_RAID1:
145 return "RAID1";
146 case BTRFS_BLOCK_GROUP_RAID5:
147 return "RAID5";
148 case BTRFS_BLOCK_GROUP_RAID6:
149 return "RAID6";
150 case BTRFS_BLOCK_GROUP_DUP:
151 return "DUP";
152 case BTRFS_BLOCK_GROUP_RAID10:
153 return "RAID10";
154 default:
155 return "unknown";
156 }
157 }
158
159 static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
160 {
161 u64 count = 0;
162 int ret, e;
163 struct btrfs_ioctl_space_args *sargs;
164
165 sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
166 if (!sargs)
167 return -ENOMEM;
168
169 sargs->space_slots = 0;
170 sargs->total_spaces = 0;
171
172 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
173 e = errno;
174 if (ret) {
175 fprintf(stderr, "ERROR: couldn't get space info - %s\n",
176 strerror(e));
177 free(sargs);
178 return -e;
179 }
180 /* This really should never happen */
181 if (!sargs->total_spaces) {
182 free(sargs);
183 return -ENOENT;
184 }
185 count = sargs->total_spaces;
186 free(sargs);
187
188 sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
189 (count * sizeof(struct btrfs_ioctl_space_info)));
190 if (!sargs)
191 ret = -ENOMEM;
192
193 sargs->space_slots = count;
194 sargs->total_spaces = 0;
195 ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
196 e = errno;
197 if (ret) {
198 fprintf(stderr, "ERROR: get space info count %llu - %s\n",
199 count, strerror(e));
200 free(sargs);
201 return -e;
202 }
203 *sargs_ret = sargs;
204 return 0;
205 }
206
207 static void print_df(struct btrfs_ioctl_space_args *sargs)
208 {
209 u64 i;
210 struct btrfs_ioctl_space_info *sp = sargs->spaces;
211
212 for (i = 0; i < sargs->total_spaces; i++, sp++) {
213 printf("%s, %s: total=%s, used=%s\n",
214 group_type_str(sp->flags),
215 group_profile_str(sp->flags),
216 pretty_size(sp->total_bytes),
217 pretty_size(sp->used_bytes));
218 }
219 }
220
221 static int cmd_df(int argc, char **argv)
222 {
223 struct btrfs_ioctl_space_args *sargs = NULL;
224 int ret;
225 int fd;
226 char *path;
227 DIR *dirstream = NULL;
228
229 if (check_argc_exact(argc, 2))
230 usage(cmd_df_usage);
231
232 path = argv[1];
233
234 fd = open_file_or_dir(path, &dirstream);
235 if (fd < 0) {
236 fprintf(stderr, "ERROR: can't access '%s'\n", path);
237 return 1;
238 }
239 ret = get_df(fd, &sargs);
240
241 if (!ret && sargs) {
242 print_df(sargs);
243 free(sargs);
244 } else {
245 fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret));
246 }
247
248 close_file_or_dir(fd, dirstream);
249 return !!ret;
250 }
251
252 static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label,
253 char *search)
254 {
255 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
256 int search_len = strlen(search);
257
258 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
259 uuid_unparse(fsid, uuidbuf);
260 if (!strncmp(uuidbuf, search, search_len))
261 return 1;
262
263 if (strlen(label) && strcmp(label, search) == 0)
264 return 1;
265
266 if (strcmp(mnt, search) == 0)
267 return 1;
268
269 return 0;
270 }
271
272 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
273 {
274 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
275 struct list_head *cur;
276 struct btrfs_device *device;
277 int search_len = strlen(search);
278
279 search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
280 uuid_unparse(fs_devices->fsid, uuidbuf);
281 if (!strncmp(uuidbuf, search, search_len))
282 return 1;
283
284 list_for_each(cur, &fs_devices->devices) {
285 device = list_entry(cur, struct btrfs_device, dev_list);
286 if ((device->label && strcmp(device->label, search) == 0) ||
287 strcmp(device->name, search) == 0)
288 return 1;
289 }
290 return 0;
291 }
292
293 /*
294 * Sort devices by devid, ascending
295 */
296 static int cmp_device_id(void *priv, struct list_head *a,
297 struct list_head *b)
298 {
299 const struct btrfs_device *da = list_entry(a, struct btrfs_device,
300 dev_list);
301 const struct btrfs_device *db = list_entry(b, struct btrfs_device,
302 dev_list);
303
304 return da->devid < db->devid ? -1 :
305 da->devid > db->devid ? 1 : 0;
306 }
307
308 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
309 {
310 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
311 struct list_head *cur;
312 struct btrfs_device *device;
313 u64 devs_found = 0;
314 u64 total;
315
316 if (add_seen_fsid(fs_devices->fsid))
317 return;
318
319 uuid_unparse(fs_devices->fsid, uuidbuf);
320 device = list_entry(fs_devices->devices.next, struct btrfs_device,
321 dev_list);
322 if (device->label && device->label[0])
323 printf("Label: '%s' ", device->label);
324 else
325 printf("Label: none ");
326
327
328 total = device->total_devs;
329 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
330 (unsigned long long)total,
331 pretty_size(device->super_bytes_used));
332
333 list_sort(NULL, &fs_devices->devices, cmp_device_id);
334 list_for_each(cur, &fs_devices->devices) {
335 device = list_entry(cur, struct btrfs_device, dev_list);
336
337 printf("\tdevid %4llu size %s used %s path %s\n",
338 (unsigned long long)device->devid,
339 pretty_size(device->total_bytes),
340 pretty_size(device->bytes_used), device->name);
341
342 devs_found++;
343 }
344 if (devs_found < total) {
345 printf("\t*** Some devices missing\n");
346 }
347 printf("\n");
348 }
349
350 /* adds up all the used spaces as reported by the space info ioctl
351 */
352 static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
353 {
354 u64 ret = 0;
355 int i;
356 for (i = 0; i < si->total_spaces; i++)
357 ret += si->spaces[i].used_bytes;
358 return ret;
359 }
360
361 static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
362 struct btrfs_ioctl_dev_info_args *dev_info,
363 struct btrfs_ioctl_space_args *space_info,
364 char *label, char *path)
365 {
366 int i;
367 int fd;
368 int missing = 0;
369 char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
370 struct btrfs_ioctl_dev_info_args *tmp_dev_info;
371 int ret;
372
373 ret = add_seen_fsid(fs_info->fsid);
374 if (ret == -EEXIST)
375 return 0;
376 else if (ret)
377 return ret;
378
379 uuid_unparse(fs_info->fsid, uuidbuf);
380 if (label && strlen(label))
381 printf("Label: '%s' ", label);
382 else
383 printf("Label: none ");
384
385 printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
386 fs_info->num_devices,
387 pretty_size(calc_used_bytes(space_info)));
388
389 for (i = 0; i < fs_info->num_devices; i++) {
390 tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
391
392 /* Add check for missing devices even mounted */
393 fd = open((char *)tmp_dev_info->path, O_RDONLY);
394 if (fd < 0) {
395 missing = 1;
396 continue;
397 }
398 close(fd);
399 printf("\tdevid %4llu size %s used %s path %s\n",
400 tmp_dev_info->devid,
401 pretty_size(tmp_dev_info->total_bytes),
402 pretty_size(tmp_dev_info->bytes_used),
403 tmp_dev_info->path);
404 }
405
406 if (missing)
407 printf("\t*** Some devices missing\n");
408 printf("\n");
409 return 0;
410 }
411
412 /* This function checks if the given input parameter is
413 * an uuid or a path
414 * return -1: some error in the given input
415 * return 0: unknow input
416 * return 1: given input is uuid
417 * return 2: given input is path
418 */
419 static int check_arg_type(char *input)
420 {
421 uuid_t out;
422 char path[PATH_MAX];
423
424 if (!input)
425 return -EINVAL;
426
427 if (realpath(input, path)) {
428 if (is_block_device(path) == 1)
429 return BTRFS_ARG_BLKDEV;
430
431 if (is_mount_point(path) == 1)
432 return BTRFS_ARG_MNTPOINT;
433
434 return BTRFS_ARG_UNKNOWN;
435 }
436
437 if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
438 !uuid_parse(input, out))
439 return BTRFS_ARG_UUID;
440
441 return BTRFS_ARG_UNKNOWN;
442 }
443
444 static int btrfs_scan_kernel(void *search)
445 {
446 int ret = 0, fd;
447 FILE *f;
448 struct mntent *mnt;
449 struct btrfs_ioctl_fs_info_args fs_info_arg;
450 struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
451 struct btrfs_ioctl_space_args *space_info_arg;
452 char label[BTRFS_LABEL_SIZE];
453
454 f = setmntent("/proc/self/mounts", "r");
455 if (f == NULL)
456 return 1;
457
458 memset(label, 0, sizeof(label));
459 while ((mnt = getmntent(f)) != NULL) {
460 if (strcmp(mnt->mnt_type, "btrfs"))
461 continue;
462 ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
463 &dev_info_arg);
464 if (ret)
465 goto out;
466
467 if (get_label_mounted(mnt->mnt_dir, label)) {
468 kfree(dev_info_arg);
469 ret = 1;
470 goto out;
471 }
472 if (search && !match_search_item_kernel(fs_info_arg.fsid,
473 mnt->mnt_dir, label, search)) {
474 kfree(dev_info_arg);
475 continue;
476 }
477
478 fd = open(mnt->mnt_dir, O_RDONLY);
479 if ((fd != -1) && !get_df(fd, &space_info_arg)) {
480 print_one_fs(&fs_info_arg, dev_info_arg,
481 space_info_arg, label, mnt->mnt_dir);
482 kfree(space_info_arg);
483 memset(label, 0, sizeof(label));
484 }
485 if (fd != -1)
486 close(fd);
487 kfree(dev_info_arg);
488 if (search)
489 ret = 0;
490 }
491 if (search)
492 ret = 1;
493
494 out:
495 endmntent(f);
496 return ret;
497 }
498
499 static int dev_to_fsid(char *dev, __u8 *fsid)
500 {
501 struct btrfs_super_block *disk_super;
502 char *buf;
503 int ret;
504 int fd;
505
506 buf = malloc(4096);
507 if (!buf)
508 return -ENOMEM;
509
510 fd = open(dev, O_RDONLY);
511 if (fd < 0) {
512 ret = -errno;
513 free(buf);
514 return ret;
515 }
516
517 disk_super = (struct btrfs_super_block *)buf;
518 ret = btrfs_read_dev_super(fd, disk_super,
519 BTRFS_SUPER_INFO_OFFSET);
520 if (ret)
521 goto out;
522
523 memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE);
524 ret = 0;
525
526 out:
527 close(fd);
528 free(buf);
529 return ret;
530 }
531
532 static const char * const cmd_show_usage[] = {
533 "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
534 "Show the structure of a filesystem",
535 "-d|--all-devices show only disks under /dev containing btrfs filesystem",
536 "-m|--mounted show only mounted btrfs",
537 "If no argument is given, structure of all present filesystems is shown.",
538 NULL
539 };
540
541 static int cmd_show(int argc, char **argv)
542 {
543 struct list_head *all_uuids;
544 struct btrfs_fs_devices *fs_devices;
545 struct list_head *cur_uuid;
546 char *search = NULL;
547 int ret;
548 int where = BTRFS_SCAN_LBLKID;
549 int type = 0;
550 char mp[BTRFS_PATH_NAME_MAX + 1];
551 char path[PATH_MAX];
552 __u8 fsid[BTRFS_FSID_SIZE];
553 char uuid_buf[37];
554 int found = 0;
555
556 while (1) {
557 int long_index;
558 static struct option long_options[] = {
559 { "all-devices", no_argument, NULL, 'd'},
560 { "mounted", no_argument, NULL, 'm'},
561 { NULL, no_argument, NULL, 0 },
562 };
563 int c = getopt_long(argc, argv, "dm", long_options,
564 &long_index);
565 if (c < 0)
566 break;
567 switch (c) {
568 case 'd':
569 where = BTRFS_SCAN_DEV;
570 break;
571 case 'm':
572 where = BTRFS_SCAN_MOUNTED;
573 break;
574 default:
575 usage(cmd_show_usage);
576 }
577 }
578
579 if (check_argc_max(argc, optind + 1))
580 usage(cmd_show_usage);
581
582 if (argc > optind) {
583 search = argv[optind];
584 if (strlen(search) == 0)
585 usage(cmd_show_usage);
586 type = check_arg_type(search);
587 /*
588 * needs spl handling if input arg is block dev
589 * And if input arg is mount-point just print it
590 * right away
591 */
592 if (type == BTRFS_ARG_BLKDEV) {
593 if (where == BTRFS_SCAN_DEV) {
594 /* we need to do this because
595 * legacy BTRFS_SCAN_DEV
596 * provides /dev/dm-x paths
597 */
598 if (realpath(search, path))
599 search = path;
600 } else {
601 ret = get_btrfs_mount(search,
602 mp, sizeof(mp));
603 if (!ret) {
604 /* given block dev is mounted*/
605 search = mp;
606 type = BTRFS_ARG_MNTPOINT;
607 } else {
608 ret = dev_to_fsid(search, fsid);
609 if (ret) {
610 fprintf(stderr,
611 "ERROR: No btrfs on %s\n",
612 search);
613 return 1;
614 }
615 uuid_unparse(fsid, uuid_buf);
616 search = uuid_buf;
617 type = BTRFS_ARG_UUID;
618 goto devs_only;
619 }
620 }
621 }
622 }
623
624 if (where == BTRFS_SCAN_DEV)
625 goto devs_only;
626
627 /* show mounted btrfs */
628 ret = btrfs_scan_kernel(search);
629 if (search && !ret) {
630 /* since search is found we are done */
631 goto out;
632 }
633
634 /* shows mounted only */
635 if (where == BTRFS_SCAN_MOUNTED)
636 goto out;
637
638 devs_only:
639 ret = scan_for_btrfs(where, !BTRFS_UPDATE_KERNEL);
640
641 if (ret) {
642 fprintf(stderr, "ERROR: %d while scanning\n", ret);
643 return 1;
644 }
645
646 all_uuids = btrfs_scanned_uuids();
647 list_for_each(cur_uuid, all_uuids) {
648 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
649 list);
650 if (search && uuid_search(fs_devices, search) == 0)
651 continue;
652
653 print_one_uuid(fs_devices);
654 found = 1;
655 }
656 if (search && !found)
657 ret = 1;
658
659 out:
660 printf("%s\n", BTRFS_BUILD_VERSION);
661 free_seen_fsid();
662 return ret;
663 }
664
665 static const char * const cmd_sync_usage[] = {
666 "btrfs filesystem sync <path>",
667 "Force a sync on a filesystem",
668 NULL
669 };
670
671 static int cmd_sync(int argc, char **argv)
672 {
673 int fd, res, e;
674 char *path;
675 DIR *dirstream = NULL;
676
677 if (check_argc_exact(argc, 2))
678 usage(cmd_sync_usage);
679
680 path = argv[1];
681
682 fd = open_file_or_dir(path, &dirstream);
683 if (fd < 0) {
684 fprintf(stderr, "ERROR: can't access '%s'\n", path);
685 return 1;
686 }
687
688 printf("FSSync '%s'\n", path);
689 res = ioctl(fd, BTRFS_IOC_SYNC);
690 e = errno;
691 close_file_or_dir(fd, dirstream);
692 if( res < 0 ){
693 fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
694 path, strerror(e));
695 return 1;
696 }
697
698 return 0;
699 }
700
701 static int parse_compress_type(char *s)
702 {
703 if (strcmp(optarg, "zlib") == 0)
704 return BTRFS_COMPRESS_ZLIB;
705 else if (strcmp(optarg, "lzo") == 0)
706 return BTRFS_COMPRESS_LZO;
707 else {
708 fprintf(stderr, "Unknown compress type %s\n", s);
709 exit(1);
710 };
711 }
712
713 static const char * const cmd_defrag_usage[] = {
714 "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
715 "Defragment a file or a directory",
716 "",
717 "-v be verbose",
718 "-r defragment files recursively",
719 "-c[zlib,lzo] compress the file while defragmenting",
720 "-f flush data to disk immediately after defragmenting",
721 "-s start defragment only from byte onward",
722 "-l len defragment only up to len bytes",
723 "-t size minimal size of file to be considered for defragmenting",
724 NULL
725 };
726
727 static int do_defrag(int fd, int fancy_ioctl,
728 struct btrfs_ioctl_defrag_range_args *range)
729 {
730 int ret;
731
732 if (!fancy_ioctl)
733 ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
734 else
735 ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range);
736
737 return ret;
738 }
739
740 static int defrag_global_fancy_ioctl;
741 static struct btrfs_ioctl_defrag_range_args defrag_global_range;
742 static int defrag_global_verbose;
743 static int defrag_global_errors;
744 static int defrag_callback(const char *fpath, const struct stat *sb,
745 int typeflag, struct FTW *ftwbuf)
746 {
747 int ret = 0;
748 int e = 0;
749 int fd = 0;
750
751 if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) {
752 if (defrag_global_verbose)
753 printf("%s\n", fpath);
754 fd = open(fpath, O_RDWR);
755 e = errno;
756 if (fd < 0)
757 goto error;
758 ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
759 e = errno;
760 close(fd);
761 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
762 fprintf(stderr, "ERROR: defrag range ioctl not "
763 "supported in this kernel, please try "
764 "without any options.\n");
765 defrag_global_errors++;
766 return ENOTTY;
767 }
768 if (ret)
769 goto error;
770 }
771 return 0;
772
773 error:
774 fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
775 defrag_global_errors++;
776 return 0;
777 }
778
779 static int cmd_defrag(int argc, char **argv)
780 {
781 int fd;
782 int flush = 0;
783 u64 start = 0;
784 u64 len = (u64)-1;
785 u32 thresh = 0;
786 int i;
787 int recursive = 0;
788 int ret = 0;
789 struct btrfs_ioctl_defrag_range_args range;
790 int e = 0;
791 int compress_type = BTRFS_COMPRESS_NONE;
792 DIR *dirstream;
793
794 defrag_global_errors = 0;
795 defrag_global_verbose = 0;
796 defrag_global_errors = 0;
797 defrag_global_fancy_ioctl = 0;
798 optind = 1;
799 while(1) {
800 int c = getopt(argc, argv, "vrc::fs:l:t:");
801 if (c < 0)
802 break;
803
804 switch(c) {
805 case 'c':
806 compress_type = BTRFS_COMPRESS_ZLIB;
807 if (optarg)
808 compress_type = parse_compress_type(optarg);
809 defrag_global_fancy_ioctl = 1;
810 break;
811 case 'f':
812 flush = 1;
813 defrag_global_fancy_ioctl = 1;
814 break;
815 case 'v':
816 defrag_global_verbose = 1;
817 break;
818 case 's':
819 start = parse_size(optarg);
820 defrag_global_fancy_ioctl = 1;
821 break;
822 case 'l':
823 len = parse_size(optarg);
824 defrag_global_fancy_ioctl = 1;
825 break;
826 case 't':
827 thresh = parse_size(optarg);
828 defrag_global_fancy_ioctl = 1;
829 break;
830 case 'r':
831 recursive = 1;
832 break;
833 default:
834 usage(cmd_defrag_usage);
835 }
836 }
837
838 if (check_argc_min(argc - optind, 1))
839 usage(cmd_defrag_usage);
840
841 memset(&defrag_global_range, 0, sizeof(range));
842 defrag_global_range.start = start;
843 defrag_global_range.len = len;
844 defrag_global_range.extent_thresh = thresh;
845 if (compress_type) {
846 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
847 defrag_global_range.compress_type = compress_type;
848 }
849 if (flush)
850 defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
851
852 for (i = optind; i < argc; i++) {
853 struct stat st;
854
855 dirstream = NULL;
856 fd = open_file_or_dir(argv[i], &dirstream);
857 if (fd < 0) {
858 fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
859 strerror(errno));
860 defrag_global_errors++;
861 close_file_or_dir(fd, dirstream);
862 continue;
863 }
864 if (fstat(fd, &st)) {
865 fprintf(stderr, "ERROR: failed to stat %s - %s\n",
866 argv[i], strerror(errno));
867 defrag_global_errors++;
868 close_file_or_dir(fd, dirstream);
869 continue;
870 }
871 if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
872 fprintf(stderr,
873 "ERROR: %s is not a directory or a regular file\n",
874 argv[i]);
875 defrag_global_errors++;
876 close_file_or_dir(fd, dirstream);
877 continue;
878 }
879 if (recursive) {
880 if (S_ISDIR(st.st_mode)) {
881 ret = nftw(argv[i], defrag_callback, 10,
882 FTW_MOUNT | FTW_PHYS);
883 if (ret == ENOTTY)
884 exit(1);
885 /* errors are handled in the callback */
886 ret = 0;
887 } else {
888 if (defrag_global_verbose)
889 printf("%s\n", argv[i]);
890 ret = do_defrag(fd, defrag_global_fancy_ioctl,
891 &defrag_global_range);
892 e = errno;
893 }
894 } else {
895 if (defrag_global_verbose)
896 printf("%s\n", argv[i]);
897 ret = do_defrag(fd, defrag_global_fancy_ioctl,
898 &defrag_global_range);
899 e = errno;
900 }
901 close_file_or_dir(fd, dirstream);
902 if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
903 fprintf(stderr, "ERROR: defrag range ioctl not "
904 "supported in this kernel, please try "
905 "without any options.\n");
906 defrag_global_errors++;
907 break;
908 }
909 if (ret) {
910 fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
911 argv[i], strerror(e));
912 defrag_global_errors++;
913 }
914 }
915 if (defrag_global_verbose)
916 printf("%s\n", BTRFS_BUILD_VERSION);
917 if (defrag_global_errors)
918 fprintf(stderr, "total %d failures\n", defrag_global_errors);
919
920 return !!defrag_global_errors;
921 }
922
923 static const char * const cmd_resize_usage[] = {
924 "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
925 "Resize a filesystem",
926 "If 'max' is passed, the filesystem will occupy all available space",
927 "on the device 'devid'.",
928 NULL
929 };
930
931 static int cmd_resize(int argc, char **argv)
932 {
933 struct btrfs_ioctl_vol_args args;
934 int fd, res, len, e;
935 char *amount, *path;
936 DIR *dirstream = NULL;
937
938 if (check_argc_exact(argc, 3))
939 usage(cmd_resize_usage);
940
941 amount = argv[1];
942 path = argv[2];
943
944 len = strlen(amount);
945 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
946 fprintf(stderr, "ERROR: size value too long ('%s)\n",
947 amount);
948 return 1;
949 }
950
951 fd = open_file_or_dir(path, &dirstream);
952 if (fd < 0) {
953 fprintf(stderr, "ERROR: can't access '%s'\n", path);
954 return 1;
955 }
956
957 printf("Resize '%s' of '%s'\n", path, amount);
958 strncpy_null(args.name, amount);
959 res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
960 e = errno;
961 close_file_or_dir(fd, dirstream);
962 if( res < 0 ){
963 fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
964 path, strerror(e));
965 return 1;
966 }
967 return 0;
968 }
969
970 static const char * const cmd_label_usage[] = {
971 "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
972 "Get or change the label of a filesystem",
973 "With one argument, get the label of filesystem on <device>.",
974 "If <newlabel> is passed, set the filesystem label to <newlabel>.",
975 NULL
976 };
977
978 static int cmd_label(int argc, char **argv)
979 {
980 if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
981 usage(cmd_label_usage);
982
983 if (argc > 2) {
984 return set_label(argv[1], argv[2]);
985 } else {
986 char label[BTRFS_LABEL_SIZE];
987 int ret;
988
989 ret = get_label(argv[1], label);
990 if (!ret)
991 fprintf(stdout, "%s\n", label);
992
993 return ret;
994 }
995 }
996
997 const struct cmd_group filesystem_cmd_group = {
998 filesystem_cmd_group_usage, NULL, {
999 { "df", cmd_df, cmd_df_usage, NULL, 0 },
1000 { "show", cmd_show, cmd_show_usage, NULL, 0 },
1001 { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
1002 { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
1003 { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
1004 { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
1005 { "label", cmd_label, cmd_label_usage, NULL, 0 },
1006 NULL_CMD_STRUCT
1007 }
1008 };
1009
1010 int cmd_filesystem(int argc, char **argv)
1011 {
1012 return handle_command_group(&filesystem_cmd_group, argc, argv);
1013 }
(deprecated) Btrfs progs developments and patch integration