2 * Copyright (C) 2012 STRATO. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #include <sys/ioctl.h>
28 static const char * const quota_cmd_group_usage[] = {
29 "btrfs quota <command> [options] <path>",
33 int quota_ctl(int cmd, int argc, char **argv)
39 struct btrfs_ioctl_quota_ctl_args args;
40 DIR *dirstream = NULL;
42 if (check_argc_exact(argc, 2))
45 memset(&args, 0, sizeof(args));
48 fd = open_file_or_dir(path, &dirstream);
50 fprintf(stderr, "ERROR: can't access '%s'\n", path);
54 ret = ioctl(fd, BTRFS_IOC_QUOTA_CTL, &args);
56 close_file_or_dir(fd, dirstream);
58 fprintf(stderr, "ERROR: quota command failed: %s\n",
65 static const char * const cmd_quota_enable_usage[] = {
66 "btrfs quota enable <path>",
67 "Enable subvolume quota support for a filesystem.",
68 "Any data already present on the filesystem will not count towards",
69 "the space usage numbers. It is recommended to enable quota for a",
70 "filesystem before writing any data to it.",
74 static int cmd_quota_enable(int argc, char **argv)
76 int ret = quota_ctl(BTRFS_QUOTA_CTL_ENABLE, argc, argv);
78 usage(cmd_quota_enable_usage);
82 static const char * const cmd_quota_disable_usage[] = {
83 "btrfs quota disable <path>",
84 "Disable subvolume quota support for a filesystem.",
88 static int cmd_quota_disable(int argc, char **argv)
90 int ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
92 usage(cmd_quota_disable_usage);
96 static const char * const cmd_quota_rescan_usage[] = {
97 "btrfs quota rescan [-sw] <path>",
98 "Trash all qgroup numbers and scan the metadata again with the current config.",
100 "-s show status of a running rescan operation",
101 "-w wait for rescan operation to finish (can be already in progress)",
105 static int cmd_quota_rescan(int argc, char **argv)
111 struct btrfs_ioctl_quota_rescan_args args;
112 int ioctlnum = BTRFS_IOC_QUOTA_RESCAN;
113 DIR *dirstream = NULL;
114 int wait_for_completion = 0;
118 int c = getopt(argc, argv, "sw");
123 ioctlnum = BTRFS_IOC_QUOTA_RESCAN_STATUS;
126 wait_for_completion = 1;
129 usage(cmd_quota_rescan_usage);
133 if (ioctlnum != BTRFS_IOC_QUOTA_RESCAN && wait_for_completion) {
134 fprintf(stderr, "ERROR: -w cannot be used with -s\n");
138 if (check_argc_exact(argc - optind, 1))
139 usage(cmd_quota_rescan_usage);
141 memset(&args, 0, sizeof(args));
144 fd = open_file_or_dir(path, &dirstream);
146 fprintf(stderr, "ERROR: can't access '%s'\n", path);
150 ret = ioctl(fd, ioctlnum, &args);
153 if (wait_for_completion && (ret == 0 || e == EINPROGRESS)) {
154 ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN_WAIT, &args);
157 close_file_or_dir(fd, dirstream);
159 if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN) {
161 fprintf(stderr, "ERROR: quota rescan failed: "
162 "%s\n", strerror(e));
165 printf("quota rescan started\n");
169 printf("no rescan operation in progress\n");
171 printf("rescan operation running (current key %lld)\n",
179 const struct cmd_group quota_cmd_group = {
180 quota_cmd_group_usage, NULL, {
181 { "enable", cmd_quota_enable, cmd_quota_enable_usage, NULL, 0 },
182 { "disable", cmd_quota_disable, cmd_quota_disable_usage, 0, 0 },
183 { "rescan", cmd_quota_rescan, cmd_quota_rescan_usage, NULL, 0 },
188 int cmd_quota(int argc, char **argv)
190 return handle_command_group("a_cmd_group, argc, argv);