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/*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include "kerncompat.h"
#include "ctree.h"
#include "ioctl.h"
#include "volumes.h"
#include "commands.h"
static const char balance_cmd_group_usage[] =
"btrfs [filesystem] balance [<command>] [options] <path>";
static const char balance_cmd_group_info[] =
"'btrfs filesystem balance' command is deprecated, please use\n"
"'btrfs balance start' command instead.";
static int do_balance(const char *path, struct btrfs_ioctl_balance_args *args)
{
int fd;
int ret;
int e;
fd = open_file_or_dir(path);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access to '%s'\n", path);
return 12;
}
ret = ioctl(fd, BTRFS_IOC_BALANCE_V2, args);
e = errno;
close(fd);
if (ret < 0) {
if (e == ECANCELED) {
if (args->state & BTRFS_BALANCE_STATE_PAUSE_REQ)
fprintf(stderr, "balance paused by user\n");
if (args->state & BTRFS_BALANCE_STATE_CANCEL_REQ)
fprintf(stderr, "balance canceled by user\n");
} else {
fprintf(stderr, "ERROR: error during balancing '%s' "
"- %s\n", path, strerror(e));
if (e != EINPROGRESS)
fprintf(stderr, "There may be more info in "
"syslog - try dmesg | tail\n");
return 19;
}
} else {
printf("Done, had to relocate %llu out of %llu chunks\n",
(unsigned long long)args->stat.completed,
(unsigned long long)args->stat.considered);
}
return 0;
}
const struct cmd_group balance_cmd_group = {
balance_cmd_group_usage, balance_cmd_group_info, {
{ 0, 0, 0, 0, 0 }
}
};
int cmd_balance(int argc, char **argv)
{
if (argc == 2) {
/* old 'btrfs filesystem balance <path>' syntax */
struct btrfs_ioctl_balance_args args;
memset(&args, 0, sizeof(args));
args.flags |= BTRFS_BALANCE_TYPE_MASK;
return do_balance(argv[1], &args);
}
return handle_command_group(&balance_cmd_group, argc, argv);
}
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