2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public
4 * License v2 as published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
9 * General Public License for more details.
11 * You should have received a copy of the GNU General Public
12 * License along with this program; if not, write to the
13 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
14 * Boston, MA 021110-1307, USA.
21 #include <sys/ioctl.h>
28 #include <uuid/uuid.h>
29 #include <linux/magic.h>
31 #include "kerncompat.h"
38 #include "btrfs-list.h"
41 static int is_subvolume_cleaned(int fd, u64 subvolid)
44 struct btrfs_ioctl_search_args args;
45 struct btrfs_ioctl_search_key *sk = &args.key;
47 sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
48 sk->min_objectid = subvolid;
49 sk->max_objectid = subvolid;
50 sk->min_type = BTRFS_ROOT_ITEM_KEY;
51 sk->max_type = BTRFS_ROOT_ITEM_KEY;
53 sk->max_offset = (u64)-1;
55 sk->max_transid = (u64)-1;
58 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
62 if (sk->nr_items == 0)
68 static int wait_for_subvolume_cleaning(int fd, int count, u64 *ids,
77 for (i = 0; i < count; i++) {
80 ret = is_subvolume_cleaned(fd, ids[i]);
83 "cannot read status of dead subvolume %llu: %s",
84 (unsigned long long)ids[i], strerror(-ret));
88 printf("Subvolume id %llu is gone\n", ids[i]);
96 sleep(sleep_interval);
102 static const char * const subvolume_cmd_group_usage[] = {
103 "btrfs subvolume <command> <args>",
107 static const char * const cmd_subvol_create_usage[] = {
108 "btrfs subvolume create [-i <qgroupid>] [<dest>/]<name>",
109 "Create a subvolume",
110 "Create a subvolume <name> in <dest>. If <dest> is not given",
111 "subvolume <name> will be created in the current directory.",
113 "-i <qgroupid> add the newly created subvolume to a qgroup. This",
114 " option can be given multiple times.",
118 static int cmd_subvol_create(int argc, char **argv)
120 int retval, res, len;
122 char *dupname = NULL;
127 struct btrfs_qgroup_inherit *inherit = NULL;
128 DIR *dirstream = NULL;
132 int c = getopt(argc, argv, "c:i:v");
138 res = qgroup_inherit_add_copy(&inherit, optarg, 0);
145 res = qgroup_inherit_add_group(&inherit, optarg);
152 usage(cmd_subvol_create_usage);
156 if (check_argc_exact(argc - optind, 1))
157 usage(cmd_subvol_create_usage);
161 retval = 1; /* failure */
162 res = test_isdir(dst);
163 if (res < 0 && res != -ENOENT) {
164 error("cannot access %s: %s", dst, strerror(-res));
168 error("target path already exists: %s", dst);
172 dupname = strdup(dst);
173 newname = basename(dupname);
174 dupdir = strdup(dst);
175 dstdir = dirname(dupdir);
177 if (!test_issubvolname(newname)) {
178 error("invalid subvolume name: %s", newname);
182 len = strlen(newname);
183 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
184 error("subvolume name too long: %s", newname);
188 fddst = btrfs_open_dir(dstdir, &dirstream, 1);
192 printf("Create subvolume '%s/%s'\n", dstdir, newname);
194 struct btrfs_ioctl_vol_args_v2 args;
196 memset(&args, 0, sizeof(args));
197 strncpy_null(args.name, newname);
198 args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
199 args.size = qgroup_inherit_size(inherit);
200 args.qgroup_inherit = inherit;
202 res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE_V2, &args);
204 struct btrfs_ioctl_vol_args args;
206 memset(&args, 0, sizeof(args));
207 strncpy_null(args.name, newname);
209 res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
213 error("cannot create subvolume: %s", strerror(errno));
217 retval = 0; /* success */
219 close_file_or_dir(fddst, dirstream);
227 static int wait_for_commit(int fd)
231 ret = ioctl(fd, BTRFS_IOC_START_SYNC, NULL);
234 return ioctl(fd, BTRFS_IOC_WAIT_SYNC, NULL);
237 static const char * const cmd_subvol_delete_usage[] = {
238 "btrfs subvolume delete [options] <subvolume> [<subvolume>...]",
239 "Delete subvolume(s)",
240 "Delete subvolumes from the filesystem. The corresponding directory",
241 "is removed instantly but the data blocks are removed later.",
242 "The deletion does not involve full commit by default due to",
243 "performance reasons (as a consequence, the subvolume may appear again",
244 "after a crash). Use one of the --commit options to wait until the",
245 "operation is safely stored on the media.",
247 "-c|--commit-after wait for transaction commit at the end of the operation",
248 "-C|--commit-each wait for transaction commit after deleting each subvolume",
252 static int cmd_subvol_delete(int argc, char **argv)
257 struct btrfs_ioctl_vol_args args;
258 char *dname, *vname, *cpath;
259 char *dupdname = NULL;
260 char *dupvname = NULL;
262 DIR *dirstream = NULL;
269 static const struct option long_options[] = {
270 {"commit-after", no_argument, NULL, 'c'}, /* commit mode 1 */
271 {"commit-each", no_argument, NULL, 'C'}, /* commit mode 2 */
275 c = getopt_long(argc, argv, "cC", long_options, NULL);
290 usage(cmd_subvol_delete_usage);
294 if (check_argc_min(argc - optind, 1))
295 usage(cmd_subvol_delete_usage);
298 printf("Transaction commit: %s\n",
299 !commit_mode ? "none (default)" :
300 commit_mode == 1 ? "at the end" : "after each");
308 res = test_issubvolume(path);
310 error("cannot access subvolume %s: %s", path, strerror(-res));
315 error("not a subvolume: %s", path);
320 cpath = realpath(path, NULL);
323 error("cannot find real path for '%s': %s",
324 path, strerror(errno));
327 dupdname = strdup(cpath);
328 dname = dirname(dupdname);
329 dupvname = strdup(cpath);
330 vname = basename(dupvname);
333 fd = btrfs_open_dir(dname, &dirstream, 1);
339 printf("Delete subvolume (%s): '%s/%s'\n",
340 commit_mode == 2 || (commit_mode == 1 && cnt + 1 == argc)
341 ? "commit" : "no-commit", dname, vname);
342 memset(&args, 0, sizeof(args));
343 strncpy_null(args.name, vname);
344 res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
346 error("cannot delete '%s/%s': %s", dname, vname,
352 if (commit_mode == 1) {
353 res = wait_for_commit(fd);
355 error("unable to wait for commit after '%s': %s",
356 path, strerror(errno));
368 close_file_or_dir(fd, dirstream);
369 /* avoid double free */
375 if (commit_mode == 2 && fd != -1) {
376 res = wait_for_commit(fd);
378 error("unable to do final sync after deletion: %s",
383 close_file_or_dir(fd, dirstream);
390 * - uppercase for filters and sort options
391 * - lowercase for enabling specific items in the output
393 static const char * const cmd_subvol_list_usage[] = {
394 "btrfs subvolume list [options] [-G [+|-]value] [-C [+|-]value] "
395 "[--sort=gen,ogen,rootid,path] <path>",
396 "List subvolumes (and snapshots)",
398 "-p print parent ID",
399 "-a print all the subvolumes in the filesystem and",
400 " distinguish absolute and relative path with respect",
401 " to the given <path>",
402 "-c print the ogeneration of the subvolume",
403 "-g print the generation of the subvolume",
404 "-o print only subvolumes below specified path",
405 "-u print the uuid of subvolumes (and snapshots)",
406 "-q print the parent uuid of the snapshots",
407 "-R print the uuid of the received snapshots",
408 "-t print the result as a table",
409 "-s list snapshots only in the filesystem",
410 "-r list readonly subvolumes (including snapshots)",
411 "-d list deleted subvolumes that are not yet cleaned",
413 " filter the subvolumes by generation",
414 " (+value: >= value; -value: <= value; value: = value)",
416 " filter the subvolumes by ogeneration",
417 " (+value: >= value; -value: <= value; value: = value)",
418 "--sort=gen,ogen,rootid,path",
419 " list the subvolume in order of gen, ogen, rootid or path",
420 " you also can add '+' or '-' in front of each items.",
421 " (+:ascending, -:descending, ascending default)",
425 static int cmd_subvol_list(int argc, char **argv)
427 struct btrfs_list_filter_set *filter_set;
428 struct btrfs_list_comparer_set *comparer_set;
432 int ret = -1, uerr = 0;
434 int is_tab_result = 0;
436 int is_only_in_path = 0;
437 DIR *dirstream = NULL;
439 filter_set = btrfs_list_alloc_filter_set();
440 comparer_set = btrfs_list_alloc_comparer_set();
445 static const struct option long_options[] = {
446 {"sort", required_argument, NULL, 'S'},
450 c = getopt_long(argc, argv,
451 "acdgopqsurRG:C:t", long_options, NULL);
457 btrfs_list_setup_print_column(BTRFS_LIST_PARENT);
463 btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
466 btrfs_list_setup_filter(&filter_set,
467 BTRFS_LIST_FILTER_DELETED,
471 btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
480 btrfs_list_setup_filter(&filter_set,
481 BTRFS_LIST_FILTER_SNAPSHOT_ONLY,
483 btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
484 btrfs_list_setup_print_column(BTRFS_LIST_OTIME);
487 btrfs_list_setup_print_column(BTRFS_LIST_UUID);
490 btrfs_list_setup_print_column(BTRFS_LIST_PUUID);
493 btrfs_list_setup_print_column(BTRFS_LIST_RUUID);
496 flags |= BTRFS_ROOT_SUBVOL_RDONLY;
499 btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
500 ret = btrfs_list_parse_filter_string(optarg,
502 BTRFS_LIST_FILTER_GEN);
510 btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
511 ret = btrfs_list_parse_filter_string(optarg,
513 BTRFS_LIST_FILTER_CGEN);
520 ret = btrfs_list_parse_sort_string(optarg,
535 btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
538 if (check_argc_exact(argc - optind, 1)) {
543 subvol = argv[optind];
544 fd = btrfs_open_dir(subvol, &dirstream, 1);
547 error("can't access '%s'", subvol);
551 ret = btrfs_list_get_path_rootid(fd, &top_id);
553 error("can't get rootid for '%s'", subvol);
558 btrfs_list_setup_filter(&filter_set,
559 BTRFS_LIST_FILTER_FULL_PATH,
561 else if (is_only_in_path)
562 btrfs_list_setup_filter(&filter_set,
563 BTRFS_LIST_FILTER_TOPID_EQUAL,
566 /* by default we shall print the following columns*/
567 btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
568 btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
569 btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
570 btrfs_list_setup_print_column(BTRFS_LIST_PATH);
573 ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
574 BTRFS_LIST_LAYOUT_TABLE,
575 !is_list_all && !is_only_in_path, NULL);
577 ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
578 BTRFS_LIST_LAYOUT_DEFAULT,
579 !is_list_all && !is_only_in_path, NULL);
582 close_file_or_dir(fd, dirstream);
584 btrfs_list_free_filter_set(filter_set);
586 btrfs_list_free_comparer_set(comparer_set);
588 usage(cmd_subvol_list_usage);
592 static const char * const cmd_subvol_snapshot_usage[] = {
593 "btrfs subvolume snapshot [-r] [-i <qgroupid>] <source> <dest>|[<dest>/]<name>",
594 "Create a snapshot of the subvolume",
595 "Create a writable/readonly snapshot of the subvolume <source> with",
596 "the name <name> in the <dest> directory. If only <dest> is given,",
597 "the subvolume will be named the basename of <source>.",
599 "-r create a readonly snapshot",
600 "-i <qgroupid> add the newly created snapshot to a qgroup. This",
601 " option can be given multiple times.",
605 static int cmd_subvol_snapshot(int argc, char **argv)
609 int fd = -1, fddst = -1;
610 int len, readonly = 0;
611 char *dupname = NULL;
615 struct btrfs_ioctl_vol_args_v2 args;
616 struct btrfs_qgroup_inherit *inherit = NULL;
617 DIR *dirstream1 = NULL, *dirstream2 = NULL;
620 memset(&args, 0, sizeof(args));
622 int c = getopt(argc, argv, "c:i:r");
628 res = qgroup_inherit_add_copy(&inherit, optarg, 0);
635 res = qgroup_inherit_add_group(&inherit, optarg);
645 res = qgroup_inherit_add_copy(&inherit, optarg, 1);
652 usage(cmd_subvol_snapshot_usage);
656 if (check_argc_exact(argc - optind, 2))
657 usage(cmd_subvol_snapshot_usage);
659 subvol = argv[optind];
660 dst = argv[optind + 1];
662 retval = 1; /* failure */
663 res = test_issubvolume(subvol);
665 error("cannot access subvolume %s: %s", subvol, strerror(-res));
669 error("not a subvolume: %s", subvol);
673 res = test_isdir(dst);
674 if (res < 0 && res != -ENOENT) {
675 error("cannot access %s: %s", dst, strerror(-res));
679 error("'%s' exists and it is not a directory", dst);
684 dupname = strdup(subvol);
685 newname = basename(dupname);
688 dupname = strdup(dst);
689 newname = basename(dupname);
690 dupdir = strdup(dst);
691 dstdir = dirname(dupdir);
694 if (!test_issubvolname(newname)) {
695 error("invalid snapshot name '%s'", newname);
699 len = strlen(newname);
700 if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
701 error("snapshot name too long '%s'", newname);
705 fddst = btrfs_open_dir(dstdir, &dirstream1, 1);
709 fd = btrfs_open_dir(subvol, &dirstream2, 1);
714 args.flags |= BTRFS_SUBVOL_RDONLY;
715 printf("Create a readonly snapshot of '%s' in '%s/%s'\n",
716 subvol, dstdir, newname);
718 printf("Create a snapshot of '%s' in '%s/%s'\n",
719 subvol, dstdir, newname);
724 args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
725 args.size = qgroup_inherit_size(inherit);
726 args.qgroup_inherit = inherit;
728 strncpy_null(args.name, newname);
730 res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
733 error("cannot snapshot '%s': %s", subvol, strerror(errno));
737 retval = 0; /* success */
740 close_file_or_dir(fddst, dirstream1);
741 close_file_or_dir(fd, dirstream2);
749 static const char * const cmd_subvol_get_default_usage[] = {
750 "btrfs subvolume get-default <path>",
751 "Get the default subvolume of a filesystem",
755 static int cmd_subvol_get_default(int argc, char **argv)
760 struct btrfs_list_filter_set *filter_set;
762 DIR *dirstream = NULL;
764 clean_args_no_options(argc, argv, cmd_subvol_get_default_usage);
766 if (check_argc_exact(argc - optind, 1))
767 usage(cmd_subvol_get_default_usage);
770 fd = btrfs_open_dir(subvol, &dirstream, 1);
774 ret = btrfs_list_get_default_subvolume(fd, &default_id);
776 error("failed to look up default subvolume: %s",
782 if (default_id == 0) {
783 error("'default' dir item not found");
787 /* no need to resolve roots if FS_TREE is default */
788 if (default_id == BTRFS_FS_TREE_OBJECTID) {
789 printf("ID 5 (FS_TREE)\n");
794 filter_set = btrfs_list_alloc_filter_set();
795 btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_ROOTID,
798 /* by default we shall print the following columns*/
799 btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
800 btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
801 btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
802 btrfs_list_setup_print_column(BTRFS_LIST_PATH);
804 ret = btrfs_list_subvols_print(fd, filter_set, NULL,
805 BTRFS_LIST_LAYOUT_DEFAULT, 1, NULL);
808 btrfs_list_free_filter_set(filter_set);
810 close_file_or_dir(fd, dirstream);
814 static const char * const cmd_subvol_set_default_usage[] = {
815 "btrfs subvolume set-default <subvolid> <path>",
816 "Set the default subvolume of a filesystem",
820 static int cmd_subvol_set_default(int argc, char **argv)
826 DIR *dirstream = NULL;
828 clean_args_no_options(argc, argv, cmd_subvol_set_default_usage);
830 if (check_argc_exact(argc - optind, 2))
831 usage(cmd_subvol_set_default_usage);
833 subvolid = argv[optind];
834 path = argv[optind + 1];
836 objectid = arg_strtou64(subvolid);
838 fd = btrfs_open_dir(path, &dirstream, 1);
842 ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
844 close_file_or_dir(fd, dirstream);
846 error("unable to set a new default subvolume: %s",
853 static const char * const cmd_subvol_find_new_usage[] = {
854 "btrfs subvolume find-new <path> <lastgen>",
855 "List the recently modified files in a filesystem",
859 static int cmd_subvol_find_new(int argc, char **argv)
865 DIR *dirstream = NULL;
867 clean_args_no_options(argc, argv, cmd_subvol_find_new_usage);
869 if (check_argc_exact(argc - optind, 2))
870 usage(cmd_subvol_find_new_usage);
872 subvol = argv[optind];
873 last_gen = arg_strtou64(argv[optind + 1]);
875 ret = test_issubvolume(subvol);
877 error("cannot access subvolume %s: %s", subvol, strerror(-ret));
881 error("not a subvolume: %s", subvol);
885 fd = btrfs_open_dir(subvol, &dirstream, 1);
889 ret = ioctl(fd, BTRFS_IOC_SYNC);
891 error("sync ioctl failed on '%s': %s",
892 subvol, strerror(errno));
893 close_file_or_dir(fd, dirstream);
897 ret = btrfs_list_find_updated_files(fd, 0, last_gen);
898 close_file_or_dir(fd, dirstream);
902 static const char * const cmd_subvol_show_usage[] = {
903 "btrfs subvolume show <subvol-path>",
904 "Show more information of the subvolume",
908 static int cmd_subvol_show(int argc, char **argv)
910 struct root_info get_ri;
911 struct btrfs_list_filter_set *filter_set = NULL;
913 char uuidparse[BTRFS_UUID_UNPARSED_SIZE];
914 char *fullpath = NULL;
915 char raw_prefix[] = "\t\t\t\t";
918 DIR *dirstream1 = NULL;
920 clean_args_no_options(argc, argv, cmd_subvol_show_usage);
922 if (check_argc_exact(argc - optind, 1))
923 usage(cmd_subvol_show_usage);
925 memset(&get_ri, 0, sizeof(get_ri));
926 fullpath = realpath(argv[optind], NULL);
928 error("cannot find real path for '%s': %s",
929 argv[optind], strerror(errno));
933 ret = get_subvol_info(fullpath, &get_ri);
936 * Since the top level btrfs was given don't
939 printf("%s is toplevel subvolume\n", fullpath);
945 error("Failed to get subvol info %s: %s\n",
946 fullpath, strerror(-ret)):
947 error("Failed to get subvol info %s: %d\n",
953 printf("%s\n", fullpath);
954 printf("\tName: \t\t\t%s\n", get_ri.name);
956 if (uuid_is_null(get_ri.uuid))
957 strcpy(uuidparse, "-");
959 uuid_unparse(get_ri.uuid, uuidparse);
960 printf("\tUUID: \t\t\t%s\n", uuidparse);
962 if (uuid_is_null(get_ri.puuid))
963 strcpy(uuidparse, "-");
965 uuid_unparse(get_ri.puuid, uuidparse);
966 printf("\tParent UUID: \t\t%s\n", uuidparse);
968 if (uuid_is_null(get_ri.ruuid))
969 strcpy(uuidparse, "-");
971 uuid_unparse(get_ri.ruuid, uuidparse);
972 printf("\tReceived UUID: \t\t%s\n", uuidparse);
977 localtime_r(&get_ri.otime, &tm);
978 strftime(tstr, 256, "%Y-%m-%d %X %z", &tm);
981 printf("\tCreation time: \t\t%s\n", tstr);
983 printf("\tSubvolume ID: \t\t%llu\n", get_ri.root_id);
984 printf("\tGeneration: \t\t%llu\n", get_ri.gen);
985 printf("\tGen at creation: \t%llu\n", get_ri.ogen);
986 printf("\tParent ID: \t\t%llu\n", get_ri.ref_tree);
987 printf("\tTop level ID: \t\t%llu\n", get_ri.top_id);
989 if (get_ri.flags & BTRFS_ROOT_SUBVOL_RDONLY)
990 printf("\tFlags: \t\t\treadonly\n");
992 printf("\tFlags: \t\t\t-\n");
994 /* print the snapshots of the given subvol if any*/
995 printf("\tSnapshot(s):\n");
996 filter_set = btrfs_list_alloc_filter_set();
997 btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_BY_PARENT,
998 (u64)(unsigned long)get_ri.uuid);
999 btrfs_list_setup_print_column(BTRFS_LIST_PATH);
1001 fd = open_file_or_dir(fullpath, &dirstream1);
1003 fprintf(stderr, "ERROR: can't access '%s'\n", fullpath);
1006 btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
1013 free(get_ri.full_path);
1014 btrfs_list_free_filter_set(filter_set);
1016 close_file_or_dir(fd, dirstream1);
1021 static const char * const cmd_subvol_sync_usage[] = {
1022 "btrfs subvolume sync <path> [<subvol-id>...]",
1023 "Wait until given subvolume(s) are completely removed from the filesystem.",
1024 "Wait until given subvolume(s) are completely removed from the filesystem",
1026 "If no subvolume id is given, wait until all current deletion requests",
1027 "are completed, but do not wait for subvolumes deleted meanwhile.",
1028 "The status of subvolume ids is checked periodically.",
1030 "-s <N> sleep N seconds between checks (default: 1)",
1036 * If we're looking for any dead subvolume, take a shortcut and look
1037 * for any ORPHAN_ITEMs in the tree root
1039 static int fs_has_dead_subvolumes(int fd)
1042 struct btrfs_ioctl_search_args args;
1043 struct btrfs_ioctl_search_key *sk = &args.key;
1044 struct btrfs_ioctl_search_header sh;
1045 u64 min_subvolid = 0;
1048 sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
1049 sk->min_objectid = BTRFS_ORPHAN_OBJECTID;
1050 sk->max_objectid = BTRFS_ORPHAN_OBJECTID;
1051 sk->min_type = BTRFS_ORPHAN_ITEM_KEY;
1052 sk->max_type = BTRFS_ORPHAN_ITEM_KEY;
1053 sk->min_offset = min_subvolid;
1054 sk->max_offset = (u64)-1;
1055 sk->min_transid = 0;
1056 sk->max_transid = (u64)-1;
1059 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
1066 memcpy(&sh, args.buf, sizeof(sh));
1067 min_subvolid = sh.offset;
1070 * Verify that the root item is really there and we haven't hit
1073 sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
1074 sk->min_objectid = min_subvolid;
1075 sk->max_objectid = min_subvolid;
1076 sk->min_type = BTRFS_ROOT_ITEM_KEY;
1077 sk->max_type = BTRFS_ROOT_ITEM_KEY;
1079 sk->max_offset = (u64)-1;
1080 sk->min_transid = 0;
1081 sk->max_transid = (u64)-1;
1084 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
1089 * Stale orphan, try the next one
1091 if (!sk->nr_items) {
1100 #define SUBVOL_ID_BATCH 1024
1103 * Enumerate all dead subvolumes that exist in the filesystem.
1104 * Fill @ids and reallocate to bigger size if needed.
1106 static int enumerate_dead_subvols(int fd, u64 **ids)
1109 struct btrfs_ioctl_search_args args;
1110 struct btrfs_ioctl_search_key *sk = &args.key;
1114 memset(&args, 0, sizeof(args));
1116 sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
1117 sk->min_objectid = BTRFS_ORPHAN_OBJECTID;
1118 sk->max_objectid = BTRFS_ORPHAN_OBJECTID;
1119 sk->min_type = BTRFS_ORPHAN_ITEM_KEY;
1120 sk->max_type = BTRFS_ORPHAN_ITEM_KEY;
1122 sk->max_offset = (u64)-1;
1123 sk->min_transid = 0;
1124 sk->max_transid = (u64)-1;
1125 sk->nr_items = 4096;
1129 struct btrfs_ioctl_search_header *sh;
1133 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
1141 for (i = 0; i < sk->nr_items; i++) {
1142 sh = (struct btrfs_ioctl_search_header*)(args.buf + off);
1145 if (sh->type == BTRFS_ORPHAN_ITEM_KEY) {
1149 count += SUBVOL_ID_BATCH;
1150 newids = (u64*)realloc(*ids,
1151 count * sizeof(u64));
1156 (*ids)[idx] = sh->offset;
1161 sk->min_objectid = sh->objectid;
1162 sk->min_type = sh->type;
1163 sk->min_offset = sh->offset;
1165 if (sk->min_offset < (u64)-1)
1169 if (sk->min_type != BTRFS_ORPHAN_ITEM_KEY)
1171 if (sk->min_objectid != BTRFS_ORPHAN_OBJECTID)
1178 static int cmd_subvol_sync(int argc, char **argv)
1183 DIR *dirstream = NULL;
1186 int sleep_interval = 1;
1190 int c = getopt(argc, argv, "s:");
1197 sleep_interval = atoi(argv[optind]);
1198 if (sleep_interval < 1) {
1199 error("invalid sleep interval %s",
1206 usage(cmd_subvol_sync_usage);
1210 if (check_argc_min(argc - optind, 1))
1211 usage(cmd_subvol_sync_usage);
1213 fd = btrfs_open_dir(argv[optind], &dirstream, 1);
1220 id_count = argc - optind;
1222 id_count = enumerate_dead_subvols(fd, &ids);
1224 error("can't enumerate dead subvolumes: %s",
1225 strerror(-id_count));
1229 if (id_count == 0) {
1234 ids = (u64*)malloc(id_count * sizeof(u64));
1236 error("not enough memory");
1241 for (i = 0; i < id_count; i++) {
1245 arg = argv[optind + i];
1247 id = strtoull(arg, NULL, 10);
1249 error("unrecognized subvolume id %s", arg);
1253 if (id < BTRFS_FIRST_FREE_OBJECTID
1254 || id > BTRFS_LAST_FREE_OBJECTID) {
1255 error("subvolume id %s out of range\n", arg);
1263 ret = wait_for_subvolume_cleaning(fd, id_count, ids, sleep_interval);
1267 close_file_or_dir(fd, dirstream);
1272 static const char subvolume_cmd_group_info[] =
1273 "manage subvolumes: create, delete, list, etc";
1275 const struct cmd_group subvolume_cmd_group = {
1276 subvolume_cmd_group_usage, subvolume_cmd_group_info, {
1277 { "create", cmd_subvol_create, cmd_subvol_create_usage, NULL, 0 },
1278 { "delete", cmd_subvol_delete, cmd_subvol_delete_usage, NULL, 0 },
1279 { "list", cmd_subvol_list, cmd_subvol_list_usage, NULL, 0 },
1280 { "snapshot", cmd_subvol_snapshot, cmd_subvol_snapshot_usage,
1282 { "get-default", cmd_subvol_get_default,
1283 cmd_subvol_get_default_usage, NULL, 0 },
1284 { "set-default", cmd_subvol_set_default,
1285 cmd_subvol_set_default_usage, NULL, 0 },
1286 { "find-new", cmd_subvol_find_new, cmd_subvol_find_new_usage,
1288 { "show", cmd_subvol_show, cmd_subvol_show_usage, NULL, 0 },
1289 { "sync", cmd_subvol_sync, cmd_subvol_sync_usage, NULL, 0 },
1294 int cmd_subvolume(int argc, char **argv)
1296 return handle_command_group(&subvolume_cmd_group, argc, argv);