sbin/hammer/cmd_reblock.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_reblock.c,v 1.3 2008/05/05 20:34:52 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 static void reblock_usage(int exit_code);
  40
  41 /*
  42  * reblock <filesystem> [compaction_precentage] (default 90%)
  43  */
  44 void
  45 hammer_cmd_reblock(char **av, int ac)
  46 {
  47         struct hammer_ioc_reblock reblock;
  48         const char *filesystem;
  49         int fd;
  50         int perc;
  51
  52         bzero(&reblock, sizeof(reblock));
  53         reblock.beg_obj_id = HAMMER_MIN_OBJID;
  54         reblock.end_obj_id = HAMMER_MAX_OBJID;
  55
  56         if (ac == 0)
  57                 reblock_usage(1);
  58         filesystem = av[0];
  59         if (ac == 1) {
  60                 perc = 90;
  61         } else {
  62                 perc = strtol(av[1], NULL, 0);
  63                 if (perc < 0 || perc > 100)
  64                         reblock_usage(1);
  65         }
  66         reblock.free_level = perc * (HAMMER_LARGEBLOCK_SIZE / 100);
  67         reblock.free_level = HAMMER_LARGEBLOCK_SIZE - reblock.free_level;
  68         if (reblock.free_level < 128)
  69                 reblock.free_level = 128;
  70         printf("reblock free level %d\n", reblock.free_level);
  71
  72         fd = open(filesystem, O_RDONLY);
  73         if (fd < 0)
  74                 err(1, "Unable to open %s", filesystem);
  75         if (ioctl(fd, HAMMERIOC_REBLOCK, &reblock) < 0) {
  76                 if (errno == EINTR) {
  77                         printf("Reblock %s interrupted by timer at %016llx\n",
  78                                 filesystem, reblock.cur_obj_id);
  79                 } else {
  80                         printf("Reblock %s failed: %s\n",
  81                                filesystem, strerror(errno));
  82                 }
  83         } else {
  84                 printf("Reblock %s succeeded\n", filesystem);
  85         }
  86         close(fd);
  87         printf("Reblocked:\n"
  88                "    %lld/%lld btree nodes\n"
  89                "    %lld/%lld records\n"
  90                "    %lld/%lld data elements\n"
  91                "    %lld/%lld data bytes\n",
  92                reblock.btree_moves, reblock.btree_count,
  93                reblock.record_moves, reblock.record_count,
  94                reblock.data_moves, reblock.data_count,
  95                reblock.data_byte_moves, reblock.data_byte_count
  96         );
  97 }
  98
  99 static
 100 void
 101 reblock_usage(int exit_code)
 102 {
 103         fprintf(stderr, "hammer reblock <filesystem> [percentage] "
 104                         "(default 90)\n");
 105         exit(exit_code);
 106 }
 107