btrfs-show.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20 #ifndef __CHECKER__
  21 #include <sys/ioctl.h>
  22 #include <sys/mount.h>
  23 #include "ioctl.h"
  24 #endif
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <getopt.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <unistd.h>
  32 #include <dirent.h>
  33 #include <uuid/uuid.h>
  34 #include "kerncompat.h"
  35 #include "ctree.h"
  36 #include "transaction.h"
  37 #include "utils.h"
  38 #include "volumes.h"
  39 #include "version.h"
  40
  41 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
  42 {
  43         struct list_head *cur;
  44         struct btrfs_device *device;
  45
  46         list_for_each(cur, &fs_devices->devices) {
  47                 device = list_entry(cur, struct btrfs_device, dev_list);
  48                 if ((device->label && strcmp(device->label, search) == 0) ||
  49                     strcmp(device->name, search) == 0)
  50                         return 1;
  51         }
  52         return 0;
  53 }
  54
  55 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
  56 {
  57         char uuidbuf[37];
  58         struct list_head *cur;
  59         struct btrfs_device *device;
  60         char *super_bytes_used;
  61         u64 devs_found = 0;
  62         u64 total;
  63
  64         uuid_unparse(fs_devices->fsid, uuidbuf);
  65         device = list_entry(fs_devices->devices.next, struct btrfs_device,
  66                             dev_list);
  67         if (device->label && device->label[0])
  68                 printf("Label: %s ", device->label);
  69         else
  70                 printf("Label: none ");
  71
  72         super_bytes_used = pretty_sizes(device->super_bytes_used);
  73
  74         total = device->total_devs;
  75         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
  76                (unsigned long long)total, super_bytes_used);
  77
  78         free(super_bytes_used);
  79
  80         list_for_each(cur, &fs_devices->devices) {
  81                 char *total_bytes;
  82                 char *bytes_used;
  83                 device = list_entry(cur, struct btrfs_device, dev_list);
  84                 total_bytes = pretty_sizes(device->total_bytes);
  85                 bytes_used = pretty_sizes(device->bytes_used);
  86                 printf("\tdevid %4llu size %s used %s path %s\n",
  87                        (unsigned long long)device->devid,
  88                        total_bytes, bytes_used, device->name);
  89                 free(total_bytes);
  90                 free(bytes_used);
  91                 devs_found++;
  92         }
  93         if (devs_found < total) {
  94                 printf("\t*** Some devices missing\n");
  95         }
  96         printf("\n");
  97 }
  98
  99 static void print_usage(void)
 100 {
 101         fprintf(stderr, "usage: btrfs-show [search label or device]\n");
 102         fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
 103         exit(1);
 104 }
 105
 106 static struct option long_options[] = {
 107         /* { "byte-count", 1, NULL, 'b' }, */
 108         { 0, 0, 0, 0}
 109 };
 110
 111 int main(int ac, char **av)
 112 {
 113         struct list_head *all_uuids;
 114         struct btrfs_fs_devices *fs_devices;
 115         struct list_head *cur_uuid;
 116         char *search = NULL;
 117         int ret;
 118         int option_index = 0;
 119
 120         while(1) {
 121                 int c;
 122                 c = getopt_long(ac, av, "", long_options,
 123                                 &option_index);
 124                 if (c < 0)
 125                         break;
 126                 switch(c) {
 127                         default:
 128                                 print_usage();
 129                 }
 130         }
 131         ac = ac - optind;
 132         if (ac != 0) {
 133                 search = av[optind];
 134         }
 135
 136         ret = btrfs_scan_one_dir("/dev", 0);
 137         if (ret)
 138                 fprintf(stderr, "error %d while scanning\n", ret);
 139
 140         all_uuids = btrfs_scanned_uuids();
 141         list_for_each(cur_uuid, all_uuids) {
 142                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 143                                         list);
 144                 if (search && uuid_search(fs_devices, search) == 0)
 145                         continue;
 146                 print_one_uuid(fs_devices);
 147         }
 148         printf("%s\n", BTRFS_BUILD_VERSION);
 149         return 0;
 150 }
 151