mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-09 08:00:13 +00:00
7bb936f382
btrfs_show_qgroups frees the filter and comparer in case it succeeds. This makes the caller slightly more complicated so move the freeing up one level. Issue: #20 Signed-off-by: David Sterba <dsterba@suse.com>
523 lines
12 KiB
C
523 lines
12 KiB
C
/*
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* Copyright (C) 2012 STRATO. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <getopt.h>
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#include "ctree.h"
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#include "ioctl.h"
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#include "commands.h"
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#include "qgroup.h"
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#include "utils.h"
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#include "help.h"
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static const char * const qgroup_cmd_group_usage[] = {
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"btrfs qgroup <command> [options] <path>",
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NULL
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};
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static int _cmd_qgroup_assign(int assign, int argc, char **argv,
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const char * const *usage_str)
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{
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int ret = 0;
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int fd;
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int rescan = 0;
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char *path;
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struct btrfs_ioctl_qgroup_assign_args args;
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DIR *dirstream = NULL;
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if (assign) {
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while (1) {
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enum { GETOPT_VAL_RESCAN = 256, GETOPT_VAL_NO_RESCAN };
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static const struct option long_options[] = {
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{ "rescan", no_argument, NULL,
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GETOPT_VAL_RESCAN },
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{ "no-rescan", no_argument, NULL,
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GETOPT_VAL_NO_RESCAN },
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{ NULL, 0, NULL, 0 }
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};
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int c = getopt_long(argc, argv, "", long_options, NULL);
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if (c < 0)
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break;
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switch (c) {
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case GETOPT_VAL_RESCAN:
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rescan = 1;
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break;
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case GETOPT_VAL_NO_RESCAN:
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rescan = 0;
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break;
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default:
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/* Usage printed by the caller */
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return -1;
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}
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}
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} else {
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clean_args_no_options(argc, argv, usage_str);
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}
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if (check_argc_exact(argc - optind, 3))
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usage(usage_str);
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memset(&args, 0, sizeof(args));
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args.assign = assign;
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args.src = parse_qgroupid(argv[optind]);
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args.dst = parse_qgroupid(argv[optind + 1]);
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path = argv[optind + 2];
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/*
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* FIXME src should accept subvol path
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*/
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if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) {
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error("bad relation requested: %s", path);
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return 1;
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}
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fd = btrfs_open_dir(path, &dirstream, 1);
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if (fd < 0)
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return 1;
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ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args);
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if (ret < 0) {
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error("unable to assign quota group: %m");
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close_file_or_dir(fd, dirstream);
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return 1;
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}
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/*
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* If ret > 0, it means assign caused qgroup data inconsistent state.
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* Schedule a quota rescan if requested.
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*
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* The return value change only happens in newer kernel. But will not
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* cause problem since old kernel has a bug that will never clear
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* INCONSISTENT bit.
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*/
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if (ret > 0) {
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if (rescan) {
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struct btrfs_ioctl_quota_rescan_args qargs;
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printf("Quota data changed, rescan scheduled\n");
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memset(&qargs, 0, sizeof(qargs));
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ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN, &qargs);
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if (ret < 0)
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error("quota rescan failed: %m");
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} else {
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warning("quotas may be inconsistent, rescan needed");
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}
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}
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close_file_or_dir(fd, dirstream);
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return ret;
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}
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static int _cmd_qgroup_create(int create, int argc, char **argv)
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{
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int ret = 0;
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int fd;
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char *path;
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struct btrfs_ioctl_qgroup_create_args args;
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DIR *dirstream = NULL;
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if (check_argc_exact(argc - optind, 2))
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return -1;
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memset(&args, 0, sizeof(args));
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args.create = create;
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args.qgroupid = parse_qgroupid(argv[optind]);
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path = argv[optind + 1];
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fd = btrfs_open_dir(path, &dirstream, 1);
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if (fd < 0)
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return 1;
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ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args);
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close_file_or_dir(fd, dirstream);
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if (ret < 0) {
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error("unable to %s quota group: %m",
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create ? "create":"destroy");
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return 1;
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}
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return 0;
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}
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static int parse_limit(const char *p, unsigned long long *s)
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{
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char *endptr;
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unsigned long long size;
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unsigned long long CLEAR_VALUE = -1;
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if (strcasecmp(p, "none") == 0) {
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*s = CLEAR_VALUE;
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return 1;
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}
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if (p[0] == '-')
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return 0;
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size = strtoull(p, &endptr, 10);
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if (p == endptr)
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return 0;
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switch (*endptr) {
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case 'T':
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case 't':
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size *= 1024;
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/* fallthrough */
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case 'G':
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case 'g':
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size *= 1024;
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/* fallthrough */
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case 'M':
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case 'm':
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size *= 1024;
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/* fallthrough */
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case 'K':
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case 'k':
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size *= 1024;
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++endptr;
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break;
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case 0:
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break;
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default:
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return 0;
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}
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if (*endptr)
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return 0;
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*s = size;
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return 1;
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}
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static const char * const cmd_qgroup_assign_usage[] = {
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"btrfs qgroup assign [options] <src> <dst> <path>",
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"Assign SRC as the child qgroup of DST",
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"",
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"--rescan schedule qutoa rescan if needed",
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"--no-rescan don't schedule quota rescan",
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NULL
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};
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static int cmd_qgroup_assign(int argc, char **argv)
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{
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return _cmd_qgroup_assign(1, argc, argv, cmd_qgroup_assign_usage);
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}
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static const char * const cmd_qgroup_remove_usage[] = {
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"btrfs qgroup remove <src> <dst> <path>",
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"Remove a child qgroup SRC from DST.",
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NULL
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};
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static int cmd_qgroup_remove(int argc, char **argv)
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{
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return _cmd_qgroup_assign(0, argc, argv, cmd_qgroup_remove_usage);
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}
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static const char * const cmd_qgroup_create_usage[] = {
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"btrfs qgroup create <qgroupid> <path>",
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"Create a subvolume quota group.",
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NULL
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};
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static int cmd_qgroup_create(int argc, char **argv)
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{
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int ret;
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clean_args_no_options(argc, argv, cmd_qgroup_create_usage);
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ret = _cmd_qgroup_create(1, argc, argv);
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if (ret < 0)
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usage(cmd_qgroup_create_usage);
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return ret;
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}
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static const char * const cmd_qgroup_destroy_usage[] = {
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"btrfs qgroup destroy <qgroupid> <path>",
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"Destroy a quota group.",
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NULL
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};
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static int cmd_qgroup_destroy(int argc, char **argv)
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{
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int ret;
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clean_args_no_options(argc, argv, cmd_qgroup_destroy_usage);
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ret = _cmd_qgroup_create(0, argc, argv);
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if (ret < 0)
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usage(cmd_qgroup_destroy_usage);
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return ret;
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}
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static const char * const cmd_qgroup_show_usage[] = {
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"btrfs qgroup show [options] <path>",
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"Show subvolume quota groups.",
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"-p print parent qgroup id",
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"-c print child qgroup id",
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"-r print limit of referenced size of qgroup",
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"-e print limit of exclusive size of qgroup",
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"-F list all qgroups which impact the given path",
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" (including ancestral qgroups)",
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"-f list all qgroups which impact the given path",
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" (excluding ancestral qgroups)",
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HELPINFO_UNITS_LONG,
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"--sort=qgroupid,rfer,excl,max_rfer,max_excl",
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" list qgroups sorted by specified items",
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" you can use '+' or '-' in front of each item.",
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" (+:ascending, -:descending, ascending default)",
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"--sync force sync of the filesystem before getting info",
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NULL
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};
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static int cmd_qgroup_show(int argc, char **argv)
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{
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char *path;
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int ret = 0;
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int fd;
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DIR *dirstream = NULL;
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u64 qgroupid;
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int filter_flag = 0;
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unsigned unit_mode;
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int sync = 0;
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struct btrfs_qgroup_comparer_set *comparer_set;
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struct btrfs_qgroup_filter_set *filter_set;
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filter_set = btrfs_qgroup_alloc_filter_set();
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comparer_set = btrfs_qgroup_alloc_comparer_set();
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unit_mode = get_unit_mode_from_arg(&argc, argv, 0);
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while (1) {
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int c;
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enum {
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GETOPT_VAL_SORT = 256,
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GETOPT_VAL_SYNC
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};
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static const struct option long_options[] = {
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{"sort", required_argument, NULL, GETOPT_VAL_SORT},
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{"sync", no_argument, NULL, GETOPT_VAL_SYNC},
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{ NULL, 0, NULL, 0 }
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};
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c = getopt_long(argc, argv, "pcreFf", long_options, NULL);
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if (c < 0)
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break;
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switch (c) {
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case 'p':
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btrfs_qgroup_setup_print_column(
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BTRFS_QGROUP_PARENT);
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break;
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case 'c':
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btrfs_qgroup_setup_print_column(
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BTRFS_QGROUP_CHILD);
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break;
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case 'r':
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btrfs_qgroup_setup_print_column(
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BTRFS_QGROUP_MAX_RFER);
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break;
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case 'e':
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btrfs_qgroup_setup_print_column(
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BTRFS_QGROUP_MAX_EXCL);
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break;
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case 'F':
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filter_flag |= 0x1;
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break;
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case 'f':
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filter_flag |= 0x2;
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break;
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case GETOPT_VAL_SORT:
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ret = btrfs_qgroup_parse_sort_string(optarg,
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&comparer_set);
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if (ret)
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usage(cmd_qgroup_show_usage);
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break;
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case GETOPT_VAL_SYNC:
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sync = 1;
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break;
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default:
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usage(cmd_qgroup_show_usage);
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}
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}
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btrfs_qgroup_setup_units(unit_mode);
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if (check_argc_exact(argc - optind, 1))
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usage(cmd_qgroup_show_usage);
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path = argv[optind];
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fd = btrfs_open_dir(path, &dirstream, 1);
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if (fd < 0) {
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free(filter_set);
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free(comparer_set);
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return 1;
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}
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if (sync) {
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ret = ioctl(fd, BTRFS_IOC_SYNC);
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if (ret < 0)
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warning("sync ioctl failed on '%s': %m", path);
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}
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if (filter_flag) {
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ret = lookup_path_rootid(fd, &qgroupid);
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if (ret < 0) {
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error("cannot resolve rootid for %s: %s",
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path, strerror(-ret));
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close_file_or_dir(fd, dirstream);
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goto out;
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}
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if (filter_flag & 0x1)
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btrfs_qgroup_setup_filter(&filter_set,
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BTRFS_QGROUP_FILTER_ALL_PARENT,
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qgroupid);
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if (filter_flag & 0x2)
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btrfs_qgroup_setup_filter(&filter_set,
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BTRFS_QGROUP_FILTER_PARENT,
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qgroupid);
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}
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ret = btrfs_show_qgroups(fd, filter_set, comparer_set);
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close_file_or_dir(fd, dirstream);
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free(filter_set);
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free(comparer_set);
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out:
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return !!ret;
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}
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static const char * const cmd_qgroup_limit_usage[] = {
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"btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>",
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"Set the limits a subvolume quota group.",
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"",
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"-c limit amount of data after compression. This is the default,",
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" it is currently not possible to turn off this option.",
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"-e limit space exclusively assigned to this qgroup",
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NULL
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};
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static int cmd_qgroup_limit(int argc, char **argv)
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{
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int ret = 0;
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int fd;
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char *path = NULL;
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struct btrfs_ioctl_qgroup_limit_args args;
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unsigned long long size;
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int compressed = 0;
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int exclusive = 0;
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DIR *dirstream = NULL;
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while (1) {
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int c = getopt(argc, argv, "ce");
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if (c < 0)
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break;
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switch (c) {
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case 'c':
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compressed = 1;
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break;
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case 'e':
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exclusive = 1;
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break;
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default:
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usage(cmd_qgroup_limit_usage);
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}
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}
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if (check_argc_min(argc - optind, 2))
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usage(cmd_qgroup_limit_usage);
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if (!parse_limit(argv[optind], &size)) {
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error("invalid size argument: %s", argv[optind]);
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return 1;
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}
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memset(&args, 0, sizeof(args));
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if (compressed)
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args.lim.flags |= BTRFS_QGROUP_LIMIT_RFER_CMPR |
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BTRFS_QGROUP_LIMIT_EXCL_CMPR;
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if (exclusive) {
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args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_EXCL;
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args.lim.max_exclusive = size;
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} else {
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args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_RFER;
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args.lim.max_referenced = size;
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}
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if (argc - optind == 2) {
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args.qgroupid = 0;
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path = argv[optind + 1];
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ret = test_issubvolume(path);
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if (ret < 0) {
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error("cannot access '%s': %s", path, strerror(-ret));
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return 1;
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}
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if (!ret) {
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error("'%s' is not a subvolume", path);
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return 1;
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}
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/*
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* keep qgroupid at 0, this indicates that the subvolume the
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* fd refers to is to be limited
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*/
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} else if (argc - optind == 3) {
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args.qgroupid = parse_qgroupid(argv[optind + 1]);
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path = argv[optind + 2];
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} else
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usage(cmd_qgroup_limit_usage);
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fd = btrfs_open_dir(path, &dirstream, 1);
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if (fd < 0)
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return 1;
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ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
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close_file_or_dir(fd, dirstream);
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if (ret < 0) {
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error("unable to limit requested quota group: %m");
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return 1;
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}
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return 0;
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}
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static const char qgroup_cmd_group_info[] =
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"manage quota groups";
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const struct cmd_group qgroup_cmd_group = {
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qgroup_cmd_group_usage, qgroup_cmd_group_info, {
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{ "assign", cmd_qgroup_assign, cmd_qgroup_assign_usage,
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NULL, 0 },
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{ "remove", cmd_qgroup_remove, cmd_qgroup_remove_usage,
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NULL, 0 },
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{ "create", cmd_qgroup_create, cmd_qgroup_create_usage,
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NULL, 0 },
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{ "destroy", cmd_qgroup_destroy, cmd_qgroup_destroy_usage,
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NULL, 0 },
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{ "show", cmd_qgroup_show, cmd_qgroup_show_usage,
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NULL, 0 },
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{ "limit", cmd_qgroup_limit, cmd_qgroup_limit_usage,
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NULL, 0 },
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NULL_CMD_STRUCT
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}
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};
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int cmd_qgroup(int argc, char **argv)
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{
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return handle_command_group(&qgroup_cmd_group, argc, argv);
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}
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