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 1.9 2008/06/26 04:07:57 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, int flags)
  46 {
  47         struct hammer_ioc_reblock reblock;
  48         const char *filesystem;
  49         int fd;
  50         int perc;
  51
  52         bzero(&reblock, sizeof(reblock));
  53
  54         reblock.key_beg.localization = HAMMER_MIN_LOCALIZATION;
  55         reblock.key_beg.obj_id = HAMMER_MIN_OBJID;
  56         hammer_get_cycle(&reblock.key_beg);
  57
  58         reblock.key_end.localization = HAMMER_MAX_LOCALIZATION;
  59         reblock.key_end.obj_id = HAMMER_MAX_OBJID;
  60
  61         reblock.head.flags = flags & HAMMER_IOC_DO_FLAGS;
  62
  63         /*
  64          * Restrict the localization domain if asked to do inodes or data,
  65          * but not both.
  66          */
  67         switch(flags & (HAMMER_IOC_DO_INODES|HAMMER_IOC_DO_DATA|HAMMER_IOC_DO_DIRS)) {
  68         case HAMMER_IOC_DO_INODES:
  69                 reblock.key_beg.localization = HAMMER_LOCALIZE_INODE;
  70                 reblock.key_end.localization = HAMMER_LOCALIZE_INODE;
  71                 break;
  72         case HAMMER_IOC_DO_DIRS:
  73         case HAMMER_IOC_DO_DATA:
  74                 reblock.key_beg.localization = HAMMER_LOCALIZE_MISC;
  75                 reblock.key_end.localization = HAMMER_LOCALIZE_MISC;
  76                 break;
  77         }
  78
  79         if (ac == 0)
  80                 reblock_usage(1);
  81         filesystem = av[0];
  82         if (ac == 1) {
  83                 perc = 100;
  84         } else {
  85                 perc = strtol(av[1], NULL, 0);
  86                 if (perc < 0 || perc > 100)
  87                         reblock_usage(1);
  88         }
  89         reblock.free_level = (int)((int64_t)perc *
  90                                    HAMMER_LARGEBLOCK_SIZE / 100);
  91         reblock.free_level = HAMMER_LARGEBLOCK_SIZE - reblock.free_level;
  92         if (reblock.free_level < 0)
  93                 reblock.free_level = 0;
  94         printf("reblock free level %d\n", reblock.free_level);
  95
  96         fd = open(filesystem, O_RDONLY);
  97         if (fd < 0)
  98                 err(1, "Unable to open %s", filesystem);
  99         if (ioctl(fd, HAMMERIOC_REBLOCK, &reblock) < 0) {
 100                 printf("Reblock %s failed: %s\n", filesystem, strerror(errno));
 101         } else if (reblock.head.flags & HAMMER_IOC_HEAD_INTR) {
 102                 printf("Reblock %s interrupted by timer at %016llx %04x\n",
 103                         filesystem,
 104                         reblock.key_cur.obj_id,
 105                         reblock.key_cur.localization);
 106                 if (CyclePath) {
 107                         hammer_set_cycle(&reblock.key_cur);
 108                 }
 109         } else {
 110                 if (CyclePath)
 111                         hammer_reset_cycle();
 112                 printf("Reblock %s succeeded\n", filesystem);
 113         }
 114         close(fd);
 115         printf("Reblocked:\n"
 116                "    %lld/%lld btree nodes\n"
 117                "    %lld/%lld data elements\n"
 118                "    %lld/%lld data bytes\n",
 119                reblock.btree_moves, reblock.btree_count,
 120                reblock.data_moves, reblock.data_count,
 121                reblock.data_byte_moves, reblock.data_byte_count
 122         );
 123 }
 124
 125 static
 126 void
 127 reblock_usage(int exit_code)
 128 {
 129         fprintf(stderr, "hammer reblock <filesystem> [percentage]\n");
 130         fprintf(stderr, "hammer reblock-btree <filesystem> [percentage]\n");
 131         fprintf(stderr, "hammer reblock-inodes <filesystem> [percentage]\n");
 132         fprintf(stderr, "hammer reblock-dirs <filesystem> [percentage]\n");
 133         fprintf(stderr, "hammer reblock-data <filesystem> [percentage]\n");
 134         fprintf(stderr, "By default 90%% is used.  Use 100%% to defragment\n");
 135         exit(exit_code);
 136 }
 137