blob: 9a7de34ef5ac3044dacba1496d06b66844bfd43f [file] [log] [blame]
/*
* 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 qgroup_assign(int assign, int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = argv[3];
struct btrfs_ioctl_qgroup_assign_args args;
DIR *dirstream = NULL;
if (check_argc_exact(argc, 4))
return -1;
memset(&args, 0, sizeof(args));
args.assign = assign;
args.src = parse_qgroupid(argv[1]);
args.dst = parse_qgroupid(argv[2]);
/*
* FIXME src should accept subvol path
*/
if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) {
fprintf(stderr, "ERROR: bad relation requested '%s'\n", path);
return 1;
}
fd = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 1;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to assign quota group: %s\n",
strerror(e));
return 1;
}
return 0;
}
static int qgroup_create(int create, int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = argv[2];
struct btrfs_ioctl_qgroup_create_args args;
DIR *dirstream = NULL;
if (check_argc_exact(argc, 3))
return -1;
memset(&args, 0, sizeof(args));
args.create = create;
args.qgroupid = parse_qgroupid(argv[1]);
fd = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 1;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to %s quota group: %s\n",
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 <src> <dst> <path>",
"Enable subvolume qgroup support for a filesystem.",
NULL
};
static int cmd_qgroup_assign(int argc, char **argv)
{
int ret = qgroup_assign(1, argc, argv);
if (ret < 0)
usage(cmd_qgroup_assign_usage);
return ret;
}
static const char * const cmd_qgroup_remove_usage[] = {
"btrfs qgroup remove <src> <dst> <path>",
"Remove a subvol from a quota group.",
NULL
};
static int cmd_qgroup_remove(int argc, char **argv)
{
int ret = qgroup_assign(0, argc, argv);
if (ret < 0)
usage(cmd_qgroup_remove_usage);
return ret;
}
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 = 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 subvolume quota group.",
NULL
};
static int cmd_qgroup_destroy(int argc, char **argv)
{
int ret = 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)",
"--raw raw numbers in bytes",
"--human-readable",
" human firendly numbers in given base, 1024 by default",
"--iec use 1024 as a base (KiB, MiB, GiB, TiB)",
"--si use 1000 as a base (kB, MB, GB, TB)",
"--kbytes show sizes in KiB, or kB with --si",
"--mbytes show sizes in MiB, or MB with --si",
"--gbytes show sizes in GiB, or GB with --si",
"--tbytes show sizes in TiB, or TB with --si",
"--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 = UNITS_DEFAULT;
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();
optind = 1;
while (1) {
int c;
static const struct option long_options[] = {
{"sort", required_argument, NULL, 'S'},
{"raw", no_argument, NULL, GETOPT_VAL_RAW},
{"kbytes", no_argument, NULL, GETOPT_VAL_KBYTES},
{"mbytes", no_argument, NULL, GETOPT_VAL_MBYTES},
{"gbytes", no_argument, NULL, GETOPT_VAL_GBYTES},
{"tbytes", no_argument, NULL, GETOPT_VAL_TBYTES},
{"si", no_argument, NULL, GETOPT_VAL_SI},
{"iec", no_argument, NULL, GETOPT_VAL_IEC},
{ "human-readable", no_argument, NULL,
GETOPT_VAL_HUMAN_READABLE},
{ 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;
case GETOPT_VAL_RAW:
unit_mode = UNITS_RAW;
break;
case GETOPT_VAL_KBYTES:
units_set_base(&unit_mode, UNITS_KBYTES);
break;
case GETOPT_VAL_MBYTES:
units_set_base(&unit_mode, UNITS_MBYTES);
break;
case GETOPT_VAL_GBYTES:
units_set_base(&unit_mode, UNITS_GBYTES);
break;
case GETOPT_VAL_TBYTES:
units_set_base(&unit_mode, UNITS_TBYTES);
break;
case GETOPT_VAL_SI:
units_set_mode(&unit_mode, UNITS_DECIMAL);
break;
case GETOPT_VAL_IEC:
units_set_mode(&unit_mode, UNITS_BINARY);
break;
case GETOPT_VAL_HUMAN_READABLE:
unit_mode = UNITS_HUMAN_BINARY;
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 = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
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)
fprintf(stderr, "ERROR: can't list qgroups: %s\n",
strerror(e));
return !!ret;
}
static const char * const cmd_qgroup_limit_usage[] = {
"btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>",
"Limit the size of 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)) {
fprintf(stderr, "Invalid size argument given\n");
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) {
fprintf(stderr, "ERROR: error accessing '%s'\n", path);
return 1;
}
if (!ret) {
fprintf(stderr, "ERROR: '%s' is not a subvolume\n",
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 = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 1;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to limit requested quota group: "
"%s\n", 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);
}