2 * Copyright (c) 2016 The DragonFly Project
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
39 #include <sys/types.h>
41 #include "hammer_disk.h"
45 static hammer_volume_ondisk_t
46 __read_ondisk(FILE *fp)
48 hammer_volume_ondisk_t ondisk;
50 ondisk = read_buf(fp, 0, sizeof(*ondisk));
52 err(1, "failed to read ondisk");
58 __test_ondisk(const hammer_volume_ondisk_t ondisk)
61 static hammer_uuid_t fsid, fstype;
62 static char label[64];
64 if (ondisk->vol_signature != HAMMER_FSBUF_VOLUME &&
65 ondisk->vol_signature != HAMMER_FSBUF_VOLUME_REV)
67 if (ondisk->vol_rootvol != HAMMER_ROOT_VOLNO)
69 if (ondisk->vol_no < 0 || ondisk->vol_no > HAMMER_MAX_VOLUMES - 1)
71 if (ondisk->vol_count < 1 || ondisk->vol_count > HAMMER_MAX_VOLUMES)
75 count = ondisk->vol_count;
77 memcpy(&fsid, &ondisk->vol_fsid, sizeof(fsid));
78 memcpy(&fstype, &ondisk->vol_fstype, sizeof(fstype));
79 strlcpy(label, ondisk->vol_label, sizeof(label));
81 if (ondisk->vol_count != count)
83 if (memcmp(&ondisk->vol_fsid, &fsid, sizeof(fsid)))
85 if (memcmp(&ondisk->vol_fstype, &fstype, sizeof(fstype)))
87 if (strcmp(ondisk->vol_label, label))
95 fstyp_hammer(FILE *fp, char *label, size_t size)
97 hammer_volume_ondisk_t ondisk;
100 ondisk = __read_ondisk(fp);
101 if (ondisk->vol_no != HAMMER_ROOT_VOLNO)
103 if (ondisk->vol_count != 1)
105 if (__test_ondisk(ondisk))
108 strlcpy(label, ondisk->vol_label, size);
116 __test_volume(const char *volpath)
118 hammer_volume_ondisk_t ondisk;
122 if ((fp = fopen(volpath, "r")) == NULL)
123 err(1, "failed to open %s", volpath);
125 ondisk = __read_ondisk(fp);
127 if (__test_ondisk(ondisk))
130 volno = ondisk->vol_no;
137 __fsvtyp_hammer(const char *blkdevs, char *label, size_t size, int partial)
139 hammer_volume_ondisk_t ondisk;
141 char *dup, *p, *volpath, x[HAMMER_MAX_VOLUMES];
142 int i, volno, error = 1;
144 memset(x, 0, sizeof(x));
145 dup = strdup(blkdevs);
150 if ((p = strchr(p, ':')) != NULL)
152 if ((volno = __test_volume(volpath)) == -1)
157 if ((fp = fopen(volpath, "r")) == NULL)
158 err(1, "failed to open %s", volpath);
159 ondisk = __read_ondisk(fp);
169 for (i = 0; i < HAMMER_MAX_VOLUMES; i++)
172 for (i = 0; i < HAMMER_MAX_VOLUMES; i++)
175 if (ondisk->vol_count != i)
177 for (; i < HAMMER_MAX_VOLUMES; i++)
181 strlcpy(label, ondisk->vol_label, size);
189 fsvtyp_hammer(const char *blkdevs, char *label, size_t size)
191 return (__fsvtyp_hammer(blkdevs, label, size, 0));
195 fsvtyp_hammer_partial(const char *blkdevs, char *label, size_t size)
197 return (__fsvtyp_hammer(blkdevs, label, size, 1));