btrfs-progs/cmds-quota.c

119 lines
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/*
* 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 "ctree.h"
#include "ioctl.h"
#include "commands.h"
#include "utils.h"
static const char * const quota_cmd_group_usage[] = {
"btrfs quota <command> [options] <path>",
NULL
};
int quota_ctl(int cmd, int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = argv[1];
struct btrfs_ioctl_quota_ctl_args args;
if (check_argc_exact(argc, 2))
return -1;
memset(&args, 0, sizeof(args));
args.cmd = cmd;
fd = open_file_or_dir(path);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 12;
}
ret = ioctl(fd, BTRFS_IOC_QUOTA_CTL, &args);
e = errno;
close(fd);
if (ret < 0) {
fprintf(stderr, "ERROR: quota command failed: %s\n",
strerror(e));
return 30;
}
return 0;
}
static const char * const cmd_quota_enable_usage[] = {
"btrfs quota enable <path>",
"Enable subvolume quota support for a filesystem.",
NULL
};
static int cmd_quota_enable(int argc, char **argv)
{
int ret = quota_ctl(BTRFS_QUOTA_CTL_ENABLE, argc, argv);
if (ret < 0)
usage(cmd_quota_enable_usage);
return ret;
}
static const char * const cmd_quota_disable_usage[] = {
"btrfs quota disable <path>",
"Disable subvolume quota support for a filesystem.",
NULL
};
static int cmd_quota_disable(int argc, char **argv)
{
int ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
if (ret < 0)
usage(cmd_quota_disable_usage);
return ret;
}
static const char * const cmd_quota_rescan_usage[] = {
"btrfs quota rescan <path>",
"Rescan the subvolume for a changed quota setting.",
NULL
};
static int cmd_quota_rescan(int argc, char **argv)
{
int ret = quota_ctl(BTRFS_QUOTA_CTL_RESCAN, argc, argv);
if (ret < 0)
usage(cmd_quota_rescan_usage);
return ret;
}
const struct cmd_group quota_cmd_group = {
quota_cmd_group_usage, NULL, {
{ "enable", cmd_quota_enable, cmd_quota_enable_usage, NULL, 0 },
{ "disable", cmd_quota_disable, cmd_quota_disable_usage, 0, 0 },
{ "rescan", cmd_quota_rescan, cmd_quota_rescan_usage, NULL, 0 },
{ 0, 0, 0, 0, 0 }
}
};
int cmd_quota(int argc, char **argv)
{
return handle_command_group(&quota_cmd_group, argc, argv);
}