btrfs-progs/btrfs-show.c

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/*
* Copyright (C) 2007 Oracle. 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.
*/
#define _GNU_SOURCE
#ifndef __CHECKER__
#include <sys/ioctl.h>
#include <sys/mount.h>
#include "ioctl.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <uuid/uuid.h>
#include "kerncompat.h"
#include "ctree.h"
#include "transaction.h"
#include "utils.h"
#include "volumes.h"
#include "version.h"
static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
{
struct list_head *cur;
struct btrfs_device *device;
list_for_each(cur, &fs_devices->devices) {
device = list_entry(cur, struct btrfs_device, dev_list);
if ((device->label && strcmp(device->label, search) == 0) ||
strcmp(device->name, search) == 0)
return 1;
}
return 0;
}
static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
{
char uuidbuf[37];
struct list_head *cur;
struct btrfs_device *device;
char *super_bytes_used;
u64 devs_found = 0;
u64 total;
uuid_unparse(fs_devices->fsid, uuidbuf);
device = list_entry(fs_devices->devices.next, struct btrfs_device,
dev_list);
if (device->label && device->label[0])
printf("Label: %s ", device->label);
else
printf("Label: none ");
super_bytes_used = pretty_sizes(device->super_bytes_used);
total = device->total_devs;
printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
(unsigned long long)total, super_bytes_used);
free(super_bytes_used);
list_for_each(cur, &fs_devices->devices) {
char *total_bytes;
char *bytes_used;
device = list_entry(cur, struct btrfs_device, dev_list);
total_bytes = pretty_sizes(device->total_bytes);
bytes_used = pretty_sizes(device->bytes_used);
printf("\tdevid %4llu size %s used %s path %s\n",
(unsigned long long)device->devid,
total_bytes, bytes_used, device->name);
free(total_bytes);
free(bytes_used);
devs_found++;
}
if (devs_found < total) {
printf("\t*** Some devices missing\n");
}
printf("\n");
}
static void print_usage(void)
{
fprintf(stderr, "usage: btrfs-show [search label or device]\n");
fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
exit(1);
}
static struct option long_options[] = {
/* { "byte-count", 1, NULL, 'b' }, */
{ 0, 0, 0, 0}
};
int main(int ac, char **av)
{
struct list_head *all_uuids;
struct btrfs_fs_devices *fs_devices;
struct list_head *cur_uuid;
char *search = NULL;
int ret;
int option_index = 0;
while(1) {
int c;
c = getopt_long(ac, av, "", long_options,
&option_index);
if (c < 0)
break;
switch(c) {
default:
print_usage();
}
}
ac = ac - optind;
if (ac != 0) {
search = av[optind];
}
ret = btrfs_scan_one_dir("/dev", 0);
if (ret)
fprintf(stderr, "error %d while scanning\n", ret);
all_uuids = btrfs_scanned_uuids();
list_for_each(cur_uuid, all_uuids) {
fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
list);
if (search && uuid_search(fs_devices, search) == 0)
continue;
print_one_uuid(fs_devices);
}
printf("%s\n", BTRFS_BUILD_VERSION);
return 0;
}