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 1.11 2008/07/16 00:53:48 thomas Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 static void reblock_usage(int exit_code);
  40
  41 /*
  42  * reblock <filesystem> [compaction_precentage] (default 100%)
  43  */
  44 void
  45 hammer_cmd_reblock(char **av, int ac, int flags)
  46 {
  47         struct hammer_ioc_reblock reblock;
  48         const char *filesystem;
  49         int fd;
  50         int perc;
  51
  52         if (TimeoutOpt > 0)
  53                 alarm(TimeoutOpt);
  54
  55         bzero(&reblock, sizeof(reblock));
  56
  57         reblock.key_beg.localization = HAMMER_MIN_LOCALIZATION;
  58         reblock.key_beg.obj_id = HAMMER_MIN_OBJID;
  59         hammer_get_cycle(&reblock.key_beg, NULL);
  60
  61         reblock.key_end.localization = HAMMER_MAX_LOCALIZATION;
  62         reblock.key_end.obj_id = HAMMER_MAX_OBJID;
  63
  64         reblock.head.flags = flags & HAMMER_IOC_DO_FLAGS;
  65
  66         /*
  67          * Restrict the localization domain if asked to do inodes or data,
  68          * but not both.
  69          */
  70         switch(flags & (HAMMER_IOC_DO_INODES|HAMMER_IOC_DO_DATA|HAMMER_IOC_DO_DIRS)) {
  71         case HAMMER_IOC_DO_INODES:
  72                 reblock.key_beg.localization = HAMMER_LOCALIZE_INODE;
  73                 reblock.key_end.localization = HAMMER_LOCALIZE_INODE;
  74                 break;
  75         case HAMMER_IOC_DO_DIRS:
  76         case HAMMER_IOC_DO_DATA:
  77                 reblock.key_beg.localization = HAMMER_LOCALIZE_MISC;
  78                 reblock.key_end.localization = HAMMER_LOCALIZE_MISC;
  79                 break;
  80         }
  81
  82         if (ac == 0)
  83                 reblock_usage(1);
  84         filesystem = av[0];
  85         if (ac == 1) {
  86                 perc = 100;
  87         } else {
  88                 perc = strtol(av[1], NULL, 0);
  89                 if (perc < 0 || perc > 100)
  90                         reblock_usage(1);
  91         }
  92         reblock.free_level = (int)((int64_t)perc *
  93                                    HAMMER_LARGEBLOCK_SIZE / 100);
  94         reblock.free_level = HAMMER_LARGEBLOCK_SIZE - reblock.free_level;
  95         if (reblock.free_level < 0)
  96                 reblock.free_level = 0;
  97         printf("reblock free level %d\n", reblock.free_level);
  98
  99         fd = open(filesystem, O_RDONLY);
 100         if (fd < 0)
 101                 err(1, "Unable to open %s", filesystem);
 102         if (ioctl(fd, HAMMERIOC_REBLOCK, &reblock) < 0) {
 103                 printf("Reblock %s failed: %s\n", filesystem, strerror(errno));
 104         } else if (reblock.head.flags & HAMMER_IOC_HEAD_INTR) {
 105                 printf("Reblock %s interrupted by timer at %016llx %04x\n",
 106                         filesystem,
 107                         reblock.key_cur.obj_id,
 108                         reblock.key_cur.localization);
 109                 if (CyclePath) {
 110                         hammer_set_cycle(&reblock.key_cur, 0);
 111                 }
 112         } else {
 113                 if (CyclePath)
 114                         hammer_reset_cycle();
 115                 printf("Reblock %s succeeded\n", filesystem);
 116         }
 117         close(fd);
 118         printf("Reblocked:\n"
 119                "    %lld/%lld btree nodes\n"
 120                "    %lld/%lld data elements\n"
 121                "    %lld/%lld data bytes\n",
 122                reblock.btree_moves, reblock.btree_count,
 123                reblock.data_moves, reblock.data_count,
 124                reblock.data_byte_moves, reblock.data_byte_count
 125         );
 126 }
 127
 128 static
 129 void
 130 reblock_usage(int exit_code)
 131 {
 132         fprintf(stderr, "hammer reblock <filesystem> [percentage]\n");
 133         fprintf(stderr, "hammer reblock-btree <filesystem> [percentage]\n");
 134         fprintf(stderr, "hammer reblock-inodes <filesystem> [percentage]\n");
 135         fprintf(stderr, "hammer reblock-dirs <filesystem> [percentage]\n");
 136         fprintf(stderr, "hammer reblock-data <filesystem> [percentage]\n");
 137         fprintf(stderr, "By default 100%% is used.\n");
 138         exit(exit_code);
 139 }
 140