2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com> and
6 * Michael Neumann <mneumann@ntecs.de>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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
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.
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
37 * Expand a HAMMER filesystem.
43 static uint64_t check_volume(const char *vol_name);
44 static void expand_usage(int exit_code);
47 * expand <filesystem> <device>
50 hammer_cmd_expand(char **av, int ac)
52 struct hammer_ioc_expand expand;
58 fd = open(av[0], O_RDONLY);
60 fprintf(stderr, "hammer expand: unable to access %s: %s\n",
61 av[0], strerror(errno));
66 * Make sure we aren't trying to expand the root filesystem. The
67 * kernel can't handle multi-volume root mounts.
69 if (fstatfs(fd, &sfs) < 0) {
70 fprintf(stderr, "hammer expand: statvfs failed on %s: %s\n",
71 av[0], strerror(errno));
74 if (strcmp(sfs.f_mntonname, "/") == 0 || sfs.f_mntonname[0] == 0) {
76 "hammer expand: Refused attempt to expand root fs.\n"
77 "The kernel is unable to boot from multi-volume\n"
78 "HAMMER root filesystems.\n");
85 bzero(&expand, sizeof(expand));
86 strncpy(expand.device_name, av[1], MAXPATHLEN);
87 expand.vol_size = check_volume(av[1]);
88 expand.boot_area_size = HAMMER_BOOT_NOMBYTES;
89 expand.mem_area_size = HAMMER_MEM_NOMBYTES;
91 if (ioctl(fd, HAMMERIOC_EXPAND, &expand) < 0) {
92 fprintf(stderr, "hammer expand ioctl: %s\n", strerror(errno));
101 expand_usage(int exit_code)
103 fprintf(stderr, "hammer expand <filesystem> <device>\n");
108 * Check basic volume characteristics. HAMMER filesystems use a minimum
109 * of a 16KB filesystem buffer size.
111 * Returns the size of the device.
113 * From newfs_hammer.c
117 check_volume(const char *vol_name)
119 struct partinfo pinfo;
123 * Get basic information about the volume
125 fd = open(vol_name, O_RDWR);
127 errx(1, "Unable to open %s R+W", vol_name);
129 if (ioctl(fd, DIOCGPART, &pinfo) < 0) {
130 errx(1, "No block device: %s", vol_name);
133 * When formatting a block device as a HAMMER volume the
134 * sector size must be compatible. HAMMER uses 16384 byte
135 * filesystem buffers.
137 if (pinfo.reserved_blocks) {
138 errx(1, "HAMMER cannot be placed in a partition "
139 "which overlaps the disklabel or MBR");
141 if (pinfo.media_blksize > 16384 ||
142 16384 % pinfo.media_blksize) {
143 errx(1, "A media sector size of %d is not supported",
144 pinfo.media_blksize);
148 return pinfo.media_size;