blob: 95aca9b8eae92ef73066fb273550fcff435e30cf [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;
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 ((args.src >> 48) >= (args.dst >> 48)) {
fprintf(stderr, "ERROR: bad relation requested '%s'\n", path);
return 12;
}
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_QGROUP_ASSIGN, &args);
e = errno;
close(fd);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to assign quota group: %s\n",
strerror(e));
return 30;
}
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;
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);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 12;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args);
e = errno;
close(fd);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to create quota group: %s\n",
strerror(e));
return 30;
}
return 0;
}
void print_qgroup_info(u64 objectid, struct btrfs_qgroup_info_item *info)
{
printf("%llu/%llu %lld %lld\n", objectid >> 48,
objectid & ((1ll << 48) - 1),
btrfs_stack_qgroup_info_referenced(info),
btrfs_stack_qgroup_info_exclusive(info));
}
int list_qgroups(int fd)
{
int ret;
struct btrfs_ioctl_search_args args;
struct btrfs_ioctl_search_key *sk = &args.key;
struct btrfs_ioctl_search_header *sh;
unsigned long off = 0;
unsigned int i;
struct btrfs_qgroup_info_item *info;
memset(&args, 0, sizeof(args));
/* search in the quota tree */
sk->tree_id = BTRFS_QUOTA_TREE_OBJECTID;
/*
* set the min and max to backref keys. The search will
* only send back this type of key now.
*/
sk->max_type = BTRFS_QGROUP_INFO_KEY;
sk->min_type = BTRFS_QGROUP_INFO_KEY;
sk->max_objectid = 0;
sk->max_offset = (u64)-1;
sk->max_transid = (u64)-1;
/* just a big number, doesn't matter much */
sk->nr_items = 4096;
while (1) {
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
if (ret < 0)
return ret;
/* the ioctl returns the number of item it found in nr_items */
if (sk->nr_items == 0)
break;
off = 0;
/*
* for each item, pull the key out of the header and then
* read the root_ref item it contains
*/
for (i = 0; i < sk->nr_items; i++) {
sh = (struct btrfs_ioctl_search_header *)(args.buf +
off);
off += sizeof(*sh);
if (sh->objectid != 0)
goto done;
if (sh->type != BTRFS_QGROUP_INFO_KEY)
goto done;
info = (struct btrfs_qgroup_info_item *)
(args.buf + off);
print_qgroup_info(sh->offset, info);
off += sh->len;
/*
* record the mins in sk so we can make sure the
* next search doesn't repeat this root
*/
sk->min_offset = sh->offset;
}
sk->nr_items = 4096;
/*
* this iteration is done, step forward one qgroup for the next
* ioctl
*/
if (sk->min_offset < (u64)-1)
sk->min_offset++;
else
break;
}
done:
return ret;
}
static int parse_limit(const char *p, unsigned long long *s)
{
char *endptr;
unsigned long long size;
if (strcasecmp(p, "none") == 0) {
*s = 0;
return 1;
}
size = strtoull(p, &endptr, 10);
switch (*endptr) {
case 'T':
case 't':
size *= 1024;
case 'G':
case 'g':
size *= 1024;
case 'M':
case 'm':
size *= 1024;
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 <path>",
"Show all subvolume quota groups.",
NULL
};
static int cmd_qgroup_show(int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = argv[1];
if (check_argc_exact(argc, 2))
usage(cmd_qgroup_show_usage);
fd = open_file_or_dir(path);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 12;
}
ret = list_qgroups(fd);
e = errno;
close(fd);
if (ret < 0) {
fprintf(stderr, "ERROR: can't list qgroups: %s\n",
strerror(e));
return 30;
}
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;
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 (size) {
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 12;
}
if (!ret) {
fprintf(stderr, "ERROR: '%s' is not a subvolume\n",
path);
return 13;
}
/*
* 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);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 12;
}
ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
e = errno;
close(fd);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to limit requested quota group: "
"%s\n", strerror(e));
return 30;
}
return 0;
}
const struct cmd_group qgroup_cmd_group = {
qgroup_cmd_group_usage, NULL, {
{ "assign", cmd_qgroup_assign, cmd_qgroup_assign_usage, 0, 0 },
{ "remove", cmd_qgroup_remove, cmd_qgroup_remove_usage, 0, 0 },
{ "create", cmd_qgroup_create, cmd_qgroup_create_usage, 0, 0 },
{ "destroy", cmd_qgroup_destroy,
cmd_qgroup_destroy_usage, 0, 0 },
{ "show", cmd_qgroup_show, cmd_qgroup_show_usage, 0, 0 },
{ "limit", cmd_qgroup_limit, cmd_qgroup_limit_usage, 0, 0 },
{ 0, 0, 0, 0, 0 }
}
};
int cmd_qgroup(int argc, char **argv)
{
return handle_command_group(&qgroup_cmd_group, argc, argv);
}