mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-24 23:22:27 +00:00
c38d9ca6f2
Extending usage messages with some info on the quota functionality:
- The -i option of "subvol create" and "subvol snapshot" was not
documented
- The -c option of "qgroup limit" is the default option
- The "qouta rescan" command is not yet implemented, while it should be
executed after enabling quota on a non-empty filesystem.
Signed-off-by: Koen De Wit <koen.de.wit@oracle.com>
123 lines
3.0 KiB
C
123 lines
3.0 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 "ctree.h"
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#include "ioctl.h"
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#include "commands.h"
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#include "utils.h"
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static const char * const quota_cmd_group_usage[] = {
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"btrfs quota <command> [options] <path>",
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NULL
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};
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int quota_ctl(int cmd, 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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int e;
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char *path = argv[1];
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struct btrfs_ioctl_quota_ctl_args args;
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if (check_argc_exact(argc, 2))
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return -1;
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memset(&args, 0, sizeof(args));
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args.cmd = cmd;
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fd = open_file_or_dir(path);
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if (fd < 0) {
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fprintf(stderr, "ERROR: can't access '%s'\n", path);
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return 12;
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}
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ret = ioctl(fd, BTRFS_IOC_QUOTA_CTL, &args);
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e = errno;
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close(fd);
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if (ret < 0) {
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fprintf(stderr, "ERROR: quota command failed: %s\n",
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strerror(e));
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return 30;
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}
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return 0;
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}
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static const char * const cmd_quota_enable_usage[] = {
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"btrfs quota enable <path>",
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"Enable subvolume quota support for a filesystem.",
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"Any data already present on the filesystem will not count towards",
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"the space usage numbers. It is recommended to enable quota for a",
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"filesystem before writing any data to it.",
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NULL
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};
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static int cmd_quota_enable(int argc, char **argv)
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{
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int ret = quota_ctl(BTRFS_QUOTA_CTL_ENABLE, argc, argv);
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if (ret < 0)
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usage(cmd_quota_enable_usage);
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return ret;
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}
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static const char * const cmd_quota_disable_usage[] = {
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"btrfs quota disable <path>",
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"Disable subvolume quota support for a filesystem.",
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NULL
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};
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static int cmd_quota_disable(int argc, char **argv)
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{
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int ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
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if (ret < 0)
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usage(cmd_quota_disable_usage);
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return ret;
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}
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static const char * const cmd_quota_rescan_usage[] = {
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"btrfs quota rescan <path>",
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"Rescan the subvolume for a changed quota setting.",
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"Not yet implemented.",
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NULL
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};
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static int cmd_quota_rescan(int argc, char **argv)
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{
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int ret = quota_ctl(BTRFS_QUOTA_CTL_RESCAN, argc, argv);
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if (ret < 0)
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usage(cmd_quota_rescan_usage);
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return ret;
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}
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const struct cmd_group quota_cmd_group = {
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quota_cmd_group_usage, NULL, {
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{ "enable", cmd_quota_enable, cmd_quota_enable_usage, NULL, 0 },
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{ "disable", cmd_quota_disable, cmd_quota_disable_usage, 0, 0 },
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{ "rescan", cmd_quota_rescan, cmd_quota_rescan_usage, NULL, 0 },
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{ 0, 0, 0, 0, 0 }
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}
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};
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int cmd_quota(int argc, char **argv)
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{
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return handle_command_group("a_cmd_group, argc, argv);
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}
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