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
35 #include <vfs/hammer/hammer_disk.h>
39 static hammer_volume_ondisk_t
40 __read_ondisk(FILE *fp)
42 hammer_volume_ondisk_t ondisk;
44 ondisk = read_buf(fp, 0, sizeof(*ondisk));
46 err(1, "failed to read ondisk");
52 __test_ondisk(const hammer_volume_ondisk_t ondisk)
55 static hammer_uuid_t fsid, fstype;
56 static char label[64];
58 if (ondisk->vol_signature != HAMMER_FSBUF_VOLUME &&
59 ondisk->vol_signature != HAMMER_FSBUF_VOLUME_REV)
61 if (ondisk->vol_rootvol != HAMMER_ROOT_VOLNO)
63 if (ondisk->vol_no < 0 || ondisk->vol_no > HAMMER_MAX_VOLUMES - 1)
65 if (ondisk->vol_count < 1 || ondisk->vol_count > HAMMER_MAX_VOLUMES)
69 count = ondisk->vol_count;
71 memcpy(&fsid, &ondisk->vol_fsid, sizeof(fsid));
72 memcpy(&fstype, &ondisk->vol_fstype, sizeof(fstype));
73 strncpy(label, ondisk->vol_label, sizeof(label));
75 if (ondisk->vol_count != count)
77 if (memcmp(&ondisk->vol_fsid, &fsid, sizeof(fsid)))
79 if (memcmp(&ondisk->vol_fstype, &fstype, sizeof(fstype)))
81 if (strncmp(ondisk->vol_label, label, sizeof(label)))
89 fstyp_hammer(FILE *fp, char *label, size_t size)
91 hammer_volume_ondisk_t ondisk;
94 ondisk = __read_ondisk(fp);
95 if (ondisk->vol_no != HAMMER_ROOT_VOLNO)
97 if (ondisk->vol_count != 1)
99 if (__test_ondisk(ondisk))
102 strlcpy(label, ondisk->vol_label, size);
110 __test_volume(const char *volpath)
112 hammer_volume_ondisk_t ondisk;
116 if ((fp = fopen(volpath, "r")) == NULL)
117 err(1, "failed to open %s", volpath);
119 ondisk = __read_ondisk(fp);
121 if (__test_ondisk(ondisk))
124 volno = ondisk->vol_no;
131 __fsvtyp_hammer(const char *blkdevs, char *label, size_t size, int partial)
133 hammer_volume_ondisk_t ondisk;
135 char *dup, *p, *volpath, x[HAMMER_MAX_VOLUMES];
136 int i, volno, error = 1;
138 memset(x, 0, sizeof(x));
139 dup = strdup(blkdevs);
144 if ((p = strchr(p, ':')) != NULL)
146 if ((volno = __test_volume(volpath)) == -1)
151 if ((fp = fopen(volpath, "r")) == NULL)
152 err(1, "failed to open %s", volpath);
153 ondisk = __read_ondisk(fp);
163 for (i = 0; i < HAMMER_MAX_VOLUMES; i++)
166 for (i = 0; i < HAMMER_MAX_VOLUMES; i++)
169 if (ondisk->vol_count != i)
171 for (; i < HAMMER_MAX_VOLUMES; i++)
175 strlcpy(label, ondisk->vol_label, size);
183 fsvtyp_hammer(const char *blkdevs, char *label, size_t size)
185 return (__fsvtyp_hammer(blkdevs, label, size, 0));
189 fsvtyp_hammer_partial(const char *blkdevs, char *label, size_t size)
191 return (__fsvtyp_hammer(blkdevs, label, size, 1));