2ff03baae971b9ab5e7fdc55bc09bc82014e5a29
[dragonfly.git] / 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 1.4 2008/05/11 20:44:44 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_get_cycle(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                 printf("Reblock %s failed: %s\n", filesystem, strerror(errno));
77         } else if (reblock.head.flags & HAMMER_IOC_HEAD_INTR) {
78                 printf("Reblock %s interrupted by timer at %016llx\n",
79                         filesystem, reblock.cur_obj_id);
80                 if (CyclePath)
81                         hammer_set_cycle(reblock.cur_obj_id);
82         } else {
83                 if (CyclePath)
84                         hammer_reset_cycle();
85                 printf("Reblock %s succeeded\n", filesystem);
86         }
87         close(fd);
88         printf("Reblocked:\n"
89                "    %lld/%lld btree nodes\n"
90                "    %lld/%lld records\n"
91                "    %lld/%lld data elements\n"
92                "    %lld/%lld data bytes\n",
93                reblock.btree_moves, reblock.btree_count,
94                reblock.record_moves, reblock.record_count,
95                reblock.data_moves, reblock.data_count,
96                reblock.data_byte_moves, reblock.data_byte_count
97         );
98 }
99
100 static
101 void
102 reblock_usage(int exit_code)
103 {
104         fprintf(stderr, "hammer reblock <filesystem> [percentage] "
105                         "(default 90)\n");
106         exit(exit_code);
107 }
108