sbin/hammer/cmd_blockmap.c

   1 /*
   2  * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sbin/hammer/cmd_blockmap.c,v 1.3 2008/06/17 04:03:38 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 #if 0
  40 static void dump_blockmap(const char *label, int zone);
  41 #endif
  42
  43 void
  44 hammer_cmd_blockmap(void)
  45 {
  46 #if 0
  47         dump_blockmap("btree", HAMMER_ZONE_BTREE_INDEX);
  48         dump_blockmap("meta", HAMMER_ZONE_META_INDEX);
  49         dump_blockmap("large-data", HAMMER_ZONE_LARGE_DATA_INDEX);
  50         dump_blockmap("small-data", HAMMER_ZONE_SMALL_DATA_INDEX);
  51 #endif
  52 }
  53
  54 #if 0
  55
  56 static
  57 void
  58 dump_blockmap(const char *label, int zone)
  59 {
  60         struct volume_info *root_volume;
  61         hammer_blockmap_t rootmap;
  62         struct hammer_blockmap_layer1 *layer1;
  63         struct hammer_blockmap_layer2 *layer2;
  64         struct buffer_info *buffer1 = NULL;
  65         struct buffer_info *buffer2 = NULL;
  66         hammer_off_t layer1_offset;
  67         hammer_off_t layer2_offset;
  68         hammer_off_t scan1;
  69         hammer_off_t scan2;
  70
  71         assert(zone >= HAMMER_ZONE_BTREE_INDEX && zone < HAMMER_MAX_ZONES);
  72         assert(RootVolNo >= 0);
  73         root_volume = get_volume(RootVolNo);
  74         rootmap = &root_volume->ondisk->vol0_blockmap[zone];
  75         assert(rootmap->phys_offset != 0);
  76
  77         printf("zone %-16s next %016llx alloc %016llx\n",
  78                 label, rootmap->next_offset, rootmap->alloc_offset);
  79
  80         for (scan1 = HAMMER_ZONE_ENCODE(zone, 0);
  81              scan1 < rootmap->alloc_offset;
  82              scan1 += HAMMER_BLOCKMAP_LAYER1) {
  83                 /*
  84                  * Dive layer 1.
  85                  */
  86                 layer1_offset = rootmap->phys_offset +
  87                                 HAMMER_BLOCKMAP_LAYER1_OFFSET(scan1);
  88                 layer1 = get_buffer_data(layer1_offset, &buffer1, 0);
  89                 printf(" layer1 %016llx @%016llx blocks-free %lld\n",
  90                         scan1, layer1->phys_offset, layer1->blocks_free);
  91                 if (layer1->phys_offset == HAMMER_BLOCKMAP_FREE)
  92                         continue;
  93                 for (scan2 = scan1;
  94                      scan2 < scan1 + HAMMER_BLOCKMAP_LAYER1 &&
  95                      scan2 < rootmap->alloc_offset;
  96                      scan2 += HAMMER_LARGEBLOCK_SIZE
  97                 ) {
  98                         /*
  99                          * Dive layer 2, each entry represents a large-block.
 100                          */
 101                         layer2_offset = layer1->phys_offset +
 102                                         HAMMER_BLOCKMAP_LAYER2_OFFSET(scan2);
 103                         layer2 = get_buffer_data(layer2_offset, &buffer2, 0);
 104                         switch(layer2->u.phys_offset) {
 105                         case HAMMER_BLOCKMAP_FREE:
 106                                 break;
 107                         case HAMMER_BLOCKMAP_UNAVAIL:
 108                                 break;
 109                         default:
 110                                 printf("        %016llx @%016llx "
 111                                        "free %3d%% (%u)\n",
 112                                        scan2, layer2->u.phys_offset,
 113                                        layer2->bytes_free * 100 /
 114                                         HAMMER_LARGEBLOCK_SIZE,
 115                                        layer2->bytes_free);
 116                                 break;
 117                         }
 118                 }
 119         }
 120         if (buffer1)
 121                 rel_buffer(buffer1);
 122         if (buffer2)
 123                 rel_buffer(buffer2);
 124         rel_volume(root_volume);
 125 }
 126
 127 #endif