Merge from vendor branch OPENSSH:
[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 1.1 2008/03/18 05:21:53 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         reblock.cur_obj_id = reblock.beg_obj_id;
56
57         if (ac == 0)
58                 reblock_usage(1);
59         filesystem = av[0];
60         if (ac == 1) {
61                 perc = 90;
62         } else {
63                 perc = strtol(av[1], NULL, 0);
64                 if (perc < 0 || perc > 100)
65                         reblock_usage(1);
66         }
67         reblock.free_level = perc * (HAMMER_LARGEBLOCK_SIZE / 100);
68         reblock.free_level = HAMMER_LARGEBLOCK_SIZE - reblock.free_level;
69         if (reblock.free_level < 128)
70                 reblock.free_level = 128;
71         printf("reblock free level %d\n", reblock.free_level);
72
73         fd = open(filesystem, O_RDONLY);
74         if (fd < 0)
75                 err(1, "Unable to open %s", filesystem);
76         if (ioctl(fd, HAMMERIOC_REBLOCK, &reblock) < 0)
77                 printf("Reblock %s failed: %s\n", filesystem, strerror(errno));
78         else
79                 printf("Reblock %s succeeded\n", filesystem);
80         close(fd);
81         printf("Reblocked:\n"
82                "    %lld/%lld btree nodes\n"
83                "    %lld/%lld records\n"
84                "    %lld/%lld data elements\n"
85                "    %lld/%lld data bytes\n",
86                reblock.btree_moves, reblock.btree_count,
87                reblock.record_moves, reblock.record_count,
88                reblock.data_moves, reblock.data_count,
89                reblock.data_byte_moves, reblock.data_byte_count
90         );
91 }
92
93 static
94 void
95 reblock_usage(int exit_code)
96 {
97         fprintf(stderr, "hammer reblock <filesystem> [percentage] "
98                         "(default 90)\n");
99         exit(exit_code);
100 }
101