| /* |
| * Copyright (C) 2012 STRATO. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License v2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #include <sys/ioctl.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| |
| #include "ctree.h" |
| #include "ioctl.h" |
| |
| #include "commands.h" |
| #include "qgroup.h" |
| #include "utils.h" |
| |
| static const char * const qgroup_cmd_group_usage[] = { |
| "btrfs qgroup <command> [options] <path>", |
| NULL |
| }; |
| |
| static int qgroup_assign(int assign, int argc, char **argv) |
| { |
| int ret = 0; |
| int fd; |
| int rescan = 0; |
| char *path; |
| struct btrfs_ioctl_qgroup_assign_args args; |
| DIR *dirstream = NULL; |
| |
| while (1) { |
| enum { GETOPT_VAL_RESCAN = 256 }; |
| static const struct option long_options[] = { |
| { "rescan", no_argument, NULL, GETOPT_VAL_RESCAN }, |
| { NULL, 0, NULL, 0 } |
| }; |
| int c = getopt_long(argc, argv, "", long_options, NULL); |
| |
| if (c < 0) |
| break; |
| switch (c) { |
| case GETOPT_VAL_RESCAN: |
| rescan = 1; |
| break; |
| default: |
| /* Usage printed by the caller */ |
| return -1; |
| } |
| } |
| |
| if (check_argc_exact(argc - optind, 3)) |
| return -1; |
| |
| memset(&args, 0, sizeof(args)); |
| args.assign = assign; |
| args.src = parse_qgroupid(argv[optind]); |
| args.dst = parse_qgroupid(argv[optind + 1]); |
| |
| path = argv[optind + 2]; |
| |
| /* |
| * FIXME src should accept subvol path |
| */ |
| if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) { |
| error("bad relation requested: %s", path); |
| return 1; |
| } |
| fd = btrfs_open_dir(path, &dirstream, 1); |
| if (fd < 0) |
| return 1; |
| |
| ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args); |
| if (ret < 0) { |
| error("unable to assign quota group: %s", strerror(errno)); |
| close_file_or_dir(fd, dirstream); |
| return 1; |
| } |
| |
| /* |
| * If ret > 0, it means assign caused qgroup data inconsistent state. |
| * Schedule a quota rescan if requested. |
| * |
| * The return value change only happens in newer kernel. But will not |
| * cause problem since old kernel has a bug that will never clear |
| * INCONSISTENT bit. |
| */ |
| if (ret > 0) { |
| if (rescan) { |
| struct btrfs_ioctl_quota_rescan_args qargs; |
| |
| printf("Quota data changed, rescan scheduled\n"); |
| memset(&qargs, 0, sizeof(qargs)); |
| ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN, &qargs); |
| if (ret < 0) |
| error("quota rescan failed: %s", |
| strerror(errno)); |
| } else { |
| warning("quotas may be inconsistent, rescan needed"); |
| } |
| } |
| close_file_or_dir(fd, dirstream); |
| return ret; |
| } |
| |
| static int qgroup_create(int create, int argc, char **argv) |
| { |
| int ret = 0; |
| int fd; |
| int e; |
| char *path = argv[2]; |
| struct btrfs_ioctl_qgroup_create_args args; |
| DIR *dirstream = NULL; |
| |
| if (check_argc_exact(argc, 3)) |
| return -1; |
| |
| memset(&args, 0, sizeof(args)); |
| args.create = create; |
| args.qgroupid = parse_qgroupid(argv[1]); |
| |
| fd = btrfs_open_dir(path, &dirstream, 1); |
| if (fd < 0) |
| return 1; |
| |
| ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args); |
| e = errno; |
| close_file_or_dir(fd, dirstream); |
| if (ret < 0) { |
| error("unable to %s quota group: %s", |
| create ? "create":"destroy", strerror(e)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int parse_limit(const char *p, unsigned long long *s) |
| { |
| char *endptr; |
| unsigned long long size; |
| unsigned long long CLEAR_VALUE = -1; |
| |
| if (strcasecmp(p, "none") == 0) { |
| *s = CLEAR_VALUE; |
| return 1; |
| } |
| |
| if (p[0] == '-') |
| return 0; |
| |
| size = strtoull(p, &endptr, 10); |
| if (p == endptr) |
| return 0; |
| |
| switch (*endptr) { |
| case 'T': |
| case 't': |
| size *= 1024; |
| /* fallthrough */ |
| case 'G': |
| case 'g': |
| size *= 1024; |
| /* fallthrough */ |
| case 'M': |
| case 'm': |
| size *= 1024; |
| /* fallthrough */ |
| case 'K': |
| case 'k': |
| size *= 1024; |
| ++endptr; |
| break; |
| case 0: |
| break; |
| default: |
| return 0; |
| } |
| |
| if (*endptr) |
| return 0; |
| |
| *s = size; |
| |
| return 1; |
| } |
| |
| static const char * const cmd_qgroup_assign_usage[] = { |
| "btrfs qgroup assign [options] <src> <dst> <path>", |
| "Assign SRC as the child qgroup of DST", |
| "", |
| "--rescan schedule qutoa rescan if needed", |
| "--no-rescan ", |
| NULL |
| }; |
| |
| static int cmd_qgroup_assign(int argc, char **argv) |
| { |
| int ret = qgroup_assign(1, argc, argv); |
| if (ret < 0) |
| usage(cmd_qgroup_assign_usage); |
| return ret; |
| } |
| |
| static const char * const cmd_qgroup_remove_usage[] = { |
| "btrfs qgroup remove <src> <dst> <path>", |
| "Remove a child qgroup SRC from DST.", |
| NULL |
| }; |
| |
| static int cmd_qgroup_remove(int argc, char **argv) |
| { |
| int ret = qgroup_assign(0, argc, argv); |
| if (ret < 0) |
| usage(cmd_qgroup_remove_usage); |
| return ret; |
| } |
| |
| static const char * const cmd_qgroup_create_usage[] = { |
| "btrfs qgroup create <qgroupid> <path>", |
| "Create a subvolume quota group.", |
| NULL |
| }; |
| |
| static int cmd_qgroup_create(int argc, char **argv) |
| { |
| int ret = qgroup_create(1, argc, argv); |
| if (ret < 0) |
| usage(cmd_qgroup_create_usage); |
| return ret; |
| } |
| |
| static const char * const cmd_qgroup_destroy_usage[] = { |
| "btrfs qgroup destroy <qgroupid> <path>", |
| "Destroy a quota group.", |
| NULL |
| }; |
| |
| static int cmd_qgroup_destroy(int argc, char **argv) |
| { |
| int ret = qgroup_create(0, argc, argv); |
| if (ret < 0) |
| usage(cmd_qgroup_destroy_usage); |
| return ret; |
| } |
| |
| static const char * const cmd_qgroup_show_usage[] = { |
| "btrfs qgroup show -pcreFf " |
| "[--sort=qgroupid,rfer,excl,max_rfer,max_excl] <path>", |
| "Show subvolume quota groups.", |
| "-p print parent qgroup id", |
| "-c print child qgroup id", |
| "-r print limit of referenced size of qgroup", |
| "-e print limit of exclusive size of qgroup", |
| "-F list all qgroups which impact the given path", |
| " (including ancestral qgroups)", |
| "-f list all qgroups which impact the given path", |
| " (excluding ancestral qgroups)", |
| HELPINFO_UNITS_LONG, |
| "--sort=qgroupid,rfer,excl,max_rfer,max_excl", |
| " list qgroups sorted by specified items", |
| " you can use '+' or '-' in front of each item.", |
| " (+:ascending, -:descending, ascending default)", |
| NULL |
| }; |
| |
| static int cmd_qgroup_show(int argc, char **argv) |
| { |
| char *path; |
| int ret = 0; |
| int fd; |
| int e; |
| DIR *dirstream = NULL; |
| u64 qgroupid; |
| int filter_flag = 0; |
| unsigned unit_mode; |
| |
| struct btrfs_qgroup_comparer_set *comparer_set; |
| struct btrfs_qgroup_filter_set *filter_set; |
| filter_set = btrfs_qgroup_alloc_filter_set(); |
| comparer_set = btrfs_qgroup_alloc_comparer_set(); |
| |
| unit_mode = get_unit_mode_from_arg(&argc, argv, 0); |
| |
| optind = 1; |
| while (1) { |
| int c; |
| static const struct option long_options[] = { |
| {"sort", required_argument, NULL, 'S'}, |
| { NULL, 0, NULL, 0 } |
| }; |
| |
| c = getopt_long(argc, argv, "pcreFf", long_options, NULL); |
| if (c < 0) |
| break; |
| switch (c) { |
| case 'p': |
| btrfs_qgroup_setup_print_column( |
| BTRFS_QGROUP_PARENT); |
| break; |
| case 'c': |
| btrfs_qgroup_setup_print_column( |
| BTRFS_QGROUP_CHILD); |
| break; |
| case 'r': |
| btrfs_qgroup_setup_print_column( |
| BTRFS_QGROUP_MAX_RFER); |
| break; |
| case 'e': |
| btrfs_qgroup_setup_print_column( |
| BTRFS_QGROUP_MAX_EXCL); |
| break; |
| case 'F': |
| filter_flag |= 0x1; |
| break; |
| case 'f': |
| filter_flag |= 0x2; |
| break; |
| case 'S': |
| ret = btrfs_qgroup_parse_sort_string(optarg, |
| &comparer_set); |
| if (ret) |
| usage(cmd_qgroup_show_usage); |
| break; |
| default: |
| usage(cmd_qgroup_show_usage); |
| } |
| } |
| btrfs_qgroup_setup_units(unit_mode); |
| |
| if (check_argc_exact(argc - optind, 1)) |
| usage(cmd_qgroup_show_usage); |
| |
| path = argv[optind]; |
| fd = btrfs_open_dir(path, &dirstream, 1); |
| if (fd < 0) { |
| btrfs_qgroup_free_filter_set(filter_set); |
| btrfs_qgroup_free_comparer_set(comparer_set); |
| return 1; |
| } |
| |
| if (filter_flag) { |
| qgroupid = btrfs_get_path_rootid(fd); |
| if (filter_flag & 0x1) |
| btrfs_qgroup_setup_filter(&filter_set, |
| BTRFS_QGROUP_FILTER_ALL_PARENT, |
| qgroupid); |
| if (filter_flag & 0x2) |
| btrfs_qgroup_setup_filter(&filter_set, |
| BTRFS_QGROUP_FILTER_PARENT, |
| qgroupid); |
| } |
| ret = btrfs_show_qgroups(fd, filter_set, comparer_set); |
| e = errno; |
| close_file_or_dir(fd, dirstream); |
| if (ret < 0) |
| error("can't list qgroups: %s", strerror(e)); |
| |
| return !!ret; |
| } |
| |
| static const char * const cmd_qgroup_limit_usage[] = { |
| "btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>", |
| "Set the limits a subvolume quota group.", |
| "", |
| "-c limit amount of data after compression. This is the default,", |
| " it is currently not possible to turn off this option.", |
| "-e limit space exclusively assigned to this qgroup", |
| NULL |
| }; |
| |
| static int cmd_qgroup_limit(int argc, char **argv) |
| { |
| int ret = 0; |
| int fd; |
| int e; |
| char *path = NULL; |
| struct btrfs_ioctl_qgroup_limit_args args; |
| unsigned long long size; |
| int compressed = 0; |
| int exclusive = 0; |
| DIR *dirstream = NULL; |
| |
| optind = 1; |
| while (1) { |
| int c = getopt(argc, argv, "ce"); |
| if (c < 0) |
| break; |
| switch (c) { |
| case 'c': |
| compressed = 1; |
| break; |
| case 'e': |
| exclusive = 1; |
| break; |
| default: |
| usage(cmd_qgroup_limit_usage); |
| } |
| } |
| |
| if (check_argc_min(argc - optind, 2)) |
| usage(cmd_qgroup_limit_usage); |
| |
| if (!parse_limit(argv[optind], &size)) { |
| error("invalid size argument: %s", argv[optind]); |
| return 1; |
| } |
| |
| memset(&args, 0, sizeof(args)); |
| if (compressed) |
| args.lim.flags |= BTRFS_QGROUP_LIMIT_RFER_CMPR | |
| BTRFS_QGROUP_LIMIT_EXCL_CMPR; |
| if (exclusive) { |
| args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_EXCL; |
| args.lim.max_exclusive = size; |
| } else { |
| args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_RFER; |
| args.lim.max_referenced = size; |
| } |
| |
| if (argc - optind == 2) { |
| args.qgroupid = 0; |
| path = argv[optind + 1]; |
| ret = test_issubvolume(path); |
| if (ret < 0) { |
| error("cannot access '%s': %s", path, strerror(-ret)); |
| return 1; |
| } |
| if (!ret) { |
| error("'%s' is not a subvolume", path); |
| return 1; |
| } |
| /* |
| * keep qgroupid at 0, this indicates that the subvolume the |
| * fd refers to is to be limited |
| */ |
| } else if (argc - optind == 3) { |
| args.qgroupid = parse_qgroupid(argv[optind + 1]); |
| path = argv[optind + 2]; |
| } else |
| usage(cmd_qgroup_limit_usage); |
| |
| fd = btrfs_open_dir(path, &dirstream, 1); |
| if (fd < 0) |
| return 1; |
| |
| ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args); |
| e = errno; |
| close_file_or_dir(fd, dirstream); |
| if (ret < 0) { |
| error("unable to limit requested quota group: %s", strerror(e)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static const char qgroup_cmd_group_info[] = |
| "manage quota groups"; |
| |
| const struct cmd_group qgroup_cmd_group = { |
| qgroup_cmd_group_usage, qgroup_cmd_group_info, { |
| { "assign", cmd_qgroup_assign, cmd_qgroup_assign_usage, |
| NULL, 0 }, |
| { "remove", cmd_qgroup_remove, cmd_qgroup_remove_usage, |
| NULL, 0 }, |
| { "create", cmd_qgroup_create, cmd_qgroup_create_usage, |
| NULL, 0 }, |
| { "destroy", cmd_qgroup_destroy, cmd_qgroup_destroy_usage, |
| NULL, 0 }, |
| { "show", cmd_qgroup_show, cmd_qgroup_show_usage, |
| NULL, 0 }, |
| { "limit", cmd_qgroup_limit, cmd_qgroup_limit_usage, |
| NULL, 0 }, |
| NULL_CMD_STRUCT |
| } |
| }; |
| |
| int cmd_qgroup(int argc, char **argv) |
| { |
| return handle_command_group(&qgroup_cmd_group, argc, argv); |
| } |