mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-24 15:12:47 +00:00
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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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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#define _GNU_SOURCE
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#ifndef __CHECKER__
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include "ioctl.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <uuid/uuid.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "transaction.h"
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#include "utils.h"
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#include "volumes.h"
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#ifdef __CHECKER__
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#define BLKGETSIZE64 0
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#define BTRFS_IOC_SNAP_CREATE 0
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#define BTRFS_IOC_ADD_DEV 0
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#define BTRFS_IOC_RM_DEV 0
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#define BTRFS_VOL_NAME_MAX 255
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struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
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static inline int ioctl(int fd, int define, void *arg) { return 0; }
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#endif
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static void print_usage(void)
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{
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fprintf(stderr, "usage: btrfs-vol [options] mount_point\n");
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fprintf(stderr, "\t-a device add one device\n");
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fprintf(stderr, "\t-b balance chunks across all devices\n");
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fprintf(stderr, "\t-r device remove one device\n");
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exit(1);
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}
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static struct option long_options[] = {
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/* { "byte-count", 1, NULL, 'b' }, */
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{ "add", 1, NULL, 'a' },
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{ "balance", 0, NULL, 'b' },
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{ "remove", 1, NULL, 'r' },
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{ 0, 0, 0, 0}
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};
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int main(int ac, char **av)
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{
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struct stat st;
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char *device = NULL;
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char *mnt = NULL;
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int ret;
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int option_index = 0;
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int cmd = 0;
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int fd;
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int devfd = 0;
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DIR *dirstream;
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struct btrfs_ioctl_vol_args args;
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u64 dev_block_count = 0;
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while(1) {
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int c;
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c = getopt_long(ac, av, "a:br:", long_options,
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&option_index);
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if (c < 0)
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break;
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switch(c) {
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case 'a':
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device = strdup(optarg);
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cmd = BTRFS_IOC_ADD_DEV;
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break;
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case 'b':
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cmd = BTRFS_IOC_BALANCE;
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break;
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case 'r':
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device = strdup(optarg);
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cmd = BTRFS_IOC_RM_DEV;
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break;
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default:
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print_usage();
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}
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}
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ac = ac - optind;
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if (ac == 0)
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print_usage();
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mnt = av[optind];
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if (device && strcmp(device, "missing") == 0 &&
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cmd == BTRFS_IOC_RM_DEV) {
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fprintf(stderr, "removing missing devices from %s\n", mnt);
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} else if (device) {
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devfd = open(device, O_RDWR);
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if (!devfd) {
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fprintf(stderr, "Unable to open device %s\n", device);
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}
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ret = fstat(devfd, &st);
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if (ret) {
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fprintf(stderr, "Unable to stat %s\n", device);
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exit(1);
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}
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if (!S_ISBLK(st.st_mode)) {
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fprintf(stderr, "%s is not a block device\n", device);
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exit(1);
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}
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}
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dirstream = opendir(mnt);
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if (!dirstream) {
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fprintf(stderr, "Unable to open directory %s\n", mnt);
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exit(1);
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}
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if (cmd == BTRFS_IOC_ADD_DEV) {
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ret = btrfs_prepare_device(devfd, device, 1, &dev_block_count);
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if (ret) {
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fprintf(stderr, "Unable to init %s\n", device);
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exit(1);
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}
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}
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fd = dirfd(dirstream);
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if (device)
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strcpy(args.name, device);
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else
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args.name[0] = '\0';
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ret = ioctl(fd, cmd, &args);
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printf("ioctl returns %d\n", ret);
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return 0;
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}
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