diff options
Diffstat (limited to 'cmds-qgroup.c')
| -rw-r--r-- | cmds-qgroup.c | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/cmds-qgroup.c b/cmds-qgroup.c new file mode 100644 index 00000000..14418d45 --- /dev/null +++ b/cmds-qgroup.c @@ -0,0 +1,508 @@ +/* + * 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 _cmd_qgroup_assign(int assign, int argc, char **argv, + const char * const *usage_str) +{ + int ret = 0; + int fd; + int rescan = 0; + char *path; + struct btrfs_ioctl_qgroup_assign_args args; + DIR *dirstream = NULL; + + if (assign) { + while (1) { + enum { GETOPT_VAL_RESCAN = 256, GETOPT_VAL_NO_RESCAN }; + static const struct option long_options[] = { + { "rescan", no_argument, NULL, + GETOPT_VAL_RESCAN }, + { "no-rescan", no_argument, NULL, + GETOPT_VAL_NO_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; + case GETOPT_VAL_NO_RESCAN: + rescan = 0; + break; + default: + /* Usage printed by the caller */ + return -1; + } + } + } else { + clean_args_no_options(argc, argv, usage_str); + } + + if (check_argc_exact(argc - optind, 3)) + usage(usage_str); + + 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 _cmd_qgroup_create(int create, int argc, char **argv) +{ + int ret = 0; + int fd; + int e; + char *path; + struct btrfs_ioctl_qgroup_create_args args; + DIR *dirstream = NULL; + + if (check_argc_exact(argc - optind, 2)) + return -1; + + memset(&args, 0, sizeof(args)); + args.create = create; + args.qgroupid = parse_qgroupid(argv[optind]); + path = argv[optind + 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 don't schedule quota rescan", + NULL +}; + +static int cmd_qgroup_assign(int argc, char **argv) +{ + return _cmd_qgroup_assign(1, argc, argv, cmd_qgroup_assign_usage); +} + +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) +{ + return _cmd_qgroup_assign(0, argc, argv, cmd_qgroup_remove_usage); +} + +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; + + clean_args_no_options(argc, argv, cmd_qgroup_create_usage); + + ret = _cmd_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; + + clean_args_no_options(argc, argv, cmd_qgroup_destroy_usage); + + ret = _cmd_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); +} |