Expand HAMMER filesystem step 1/2
[dragonfly.git] / sbin / hammer / cmd_expand.c
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
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5 * by Matthew Dillon <dillon@backplane.com> and
6 * Michael Neumann <mneumann@ntecs.de>
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7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 */
36/*
37 * Expand a HAMMER filesystem.
38 */
39
40#include "hammer.h"
41#include <string.h>
42
90ecab35 43static uint64_t check_volume(const char *vol_name);
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44static void expand_usage(int exit_code);
45
46/*
47 * expand <filesystem> <device>
48 */
49void
50hammer_cmd_expand(char **av, int ac)
51{
52 struct hammer_ioc_expand expand;
53 int fd;
54
55 if (ac != 2)
56 expand_usage(1);
57 fd = open(av[0], O_RDONLY);
58 if (fd < 0) {
59 fprintf(stderr, "hammer expand: unable to access %s: %s\n",
60 av[0], strerror(errno));
61 exit(1);
62 }
63
64 bzero(&expand, sizeof(expand));
65 strncpy(expand.device_name, av[1], MAXPATHLEN);
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66 expand.vol_size = check_volume(av[1]);
67 expand.boot_area_size = 0; // XXX
68 expand.mem_area_size = 0; // XXX
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69
70 if (ioctl(fd, HAMMERIOC_EXPAND, &expand) < 0) {
71 fprintf(stderr, "hammer expand ioctl: %s\n", strerror(errno));
72 exit(1);
73 }
74
75 close(fd);
76}
77
78static
79void
80expand_usage(int exit_code)
81{
82 fprintf(stderr, "hammer expand <filesystem> <device>\n");
83 exit(exit_code);
84}
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85
86/*
87 * Check basic volume characteristics. HAMMER filesystems use a minimum
88 * of a 16KB filesystem buffer size.
89 *
90 * Returns the size of the device.
91 *
92 * From newfs_hammer.c
93 */
94static
95uint64_t
96check_volume(const char *vol_name)
97{
98 struct partinfo pinfo;
99 int fd;
100
101 /*
102 * Get basic information about the volume
103 */
104 fd = open(vol_name, O_RDWR);
105 if (fd < 0)
106 errx(1, "Unable to open %s R+W", vol_name);
107
108 if (ioctl(fd, DIOCGPART, &pinfo) < 0) {
109 errx(1, "No block device: %s", vol_name);
110 }
111 /*
112 * When formatting a block device as a HAMMER volume the
113 * sector size must be compatible. HAMMER uses 16384 byte
114 * filesystem buffers.
115 */
116 if (pinfo.reserved_blocks) {
117 errx(1, "HAMMER cannot be placed in a partition "
118 "which overlaps the disklabel or MBR");
119 }
120 if (pinfo.media_blksize > 16384 ||
121 16384 % pinfo.media_blksize) {
122 errx(1, "A media sector size of %d is not supported",
123 pinfo.media_blksize);
124 }
125
126 close(fd);
127 return pinfo.media_size;
128}