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
  40 static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
  41 {
  42         struct list_head *cur;
  43         struct btrfs_device *device;
  44
  45         list_for_each(cur, &fs_devices->devices) {
  46                 device = list_entry(cur, struct btrfs_device, dev_list);
  47                 if ((device->label && strcmp(device->label, search) == 0) ||
  48                     strcmp(device->name, search) == 0)
  49                         return 1;
  50         }
  51         return 0;
  52 }
  53
  54 static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
  55 {
  56         char uuidbuf[37];
  57         struct list_head *cur;
  58         struct btrfs_device *device;
  59         char *super_bytes_used;
  60         u64 devs_found = 0;
  61         u64 total;
  62
  63         uuid_unparse(fs_devices->fsid, uuidbuf);
  64         device = list_entry(fs_devices->devices.next, struct btrfs_device,
  65                             dev_list);
  66         if (device->label && device->label[0])
  67                 printf("Label: %s ", device->label);
  68         else
  69                 printf("Label: none ");
  70
  71         super_bytes_used = pretty_sizes(device->super_bytes_used);
  72
  73         total = device->total_devs;
  74         printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
  75                (unsigned long long)total, super_bytes_used);
  76
  77         free(super_bytes_used);
  78
  79         list_for_each(cur, &fs_devices->devices) {
  80                 char *total_bytes;
  81                 char *bytes_used;
  82                 device = list_entry(cur, struct btrfs_device, dev_list);
  83                 total_bytes = pretty_sizes(device->total_bytes);
  84                 bytes_used = pretty_sizes(device->bytes_used);
  85                 printf("\tdevid %4llu size %s used %s path %s\n",
  86                        (unsigned long long)device->devid,
  87                        total_bytes, bytes_used, device->name);
  88                 free(total_bytes);
  89                 free(bytes_used);
  90                 devs_found++;
  91         }
  92         if (devs_found < total) {
  93                 printf("\t*** Some devices missing\n");
  94         }
  95         printf("\n");
  96 }
  97
  98 static void print_usage(void)
  99 {
 100         fprintf(stderr, "usage: btrfs-show [search label or device]\n");
 101         exit(1);
 102 }
 103
 104 static struct option long_options[] = {
 105         /* { "byte-count", 1, NULL, 'b' }, */
 106         { 0, 0, 0, 0}
 107 };
 108
 109 int main(int ac, char **av)
 110 {
 111         struct list_head *all_uuids;
 112         struct btrfs_fs_devices *fs_devices;
 113         struct list_head *cur_uuid;
 114         char *search = NULL;
 115         int ret;
 116         int option_index = 0;
 117
 118         while(1) {
 119                 int c;
 120                 c = getopt_long(ac, av, "", long_options,
 121                                 &option_index);
 122                 if (c < 0)
 123                         break;
 124                 switch(c) {
 125                         default:
 126                                 print_usage();
 127                 }
 128         }
 129         ac = ac - optind;
 130         if (ac != 0) {
 131                 search = av[optind];
 132         }
 133
 134         ret = btrfs_scan_one_dir("/dev", 0);
 135         if (ret)
 136                 fprintf(stderr, "error %d while scanning\n", ret);
 137
 138         all_uuids = btrfs_scanned_uuids();
 139         list_for_each(cur_uuid, all_uuids) {
 140                 fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
 141                                         list);
 142                 if (search && uuid_search(fs_devices, search) == 0)
 143                         continue;
 144                 print_one_uuid(fs_devices);
 145         }
 146         return 0;
 147 }
 148