forked from Mirrors/btrfs-progs
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "ioctl.h"
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#include "volumes.h"
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#include "commands.h"
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static const char balance_cmd_group_usage[] =
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"btrfs [filesystem] balance [<command>] [options] <path>";
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static const char balance_cmd_group_info[] =
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"'btrfs filesystem balance' command is deprecated, please use\n"
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"'btrfs balance start' command instead.";
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static int do_balance(const char *path, struct btrfs_ioctl_balance_args *args)
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{
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int fd;
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int ret;
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int e;
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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 to '%s'\n", path);
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return 12;
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}
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ret = ioctl(fd, BTRFS_IOC_BALANCE_V2, args);
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e = errno;
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close(fd);
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if (ret < 0) {
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if (e == ECANCELED) {
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if (args->state & BTRFS_BALANCE_STATE_PAUSE_REQ)
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fprintf(stderr, "balance paused by user\n");
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if (args->state & BTRFS_BALANCE_STATE_CANCEL_REQ)
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fprintf(stderr, "balance canceled by user\n");
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} else {
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fprintf(stderr, "ERROR: error during balancing '%s' "
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"- %s\n", path, strerror(e));
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if (e != EINPROGRESS)
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fprintf(stderr, "There may be more info in "
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"syslog - try dmesg | tail\n");
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return 19;
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}
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} else {
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printf("Done, had to relocate %llu out of %llu chunks\n",
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(unsigned long long)args->stat.completed,
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(unsigned long long)args->stat.considered);
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}
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return 0;
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}
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const struct cmd_group balance_cmd_group = {
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balance_cmd_group_usage, balance_cmd_group_info, {
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{ 0, 0, 0, 0, 0 }
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}
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};
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int cmd_balance(int argc, char **argv)
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{
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if (argc == 2) {
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/* old 'btrfs filesystem balance <path>' syntax */
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struct btrfs_ioctl_balance_args args;
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memset(&args, 0, sizeof(args));
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args.flags |= BTRFS_BALANCE_TYPE_MASK;
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return do_balance(argv[1], &args);
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}
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return handle_command_group(&balance_cmd_group, argc, argv);
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}
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