2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002, 2003 Gordon Tetlow
5 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/vnode.h>
38 #include <ufs/ufs/dinode.h>
39 #include <ufs/ffs/fs.h>
40 #include <ufs/ufs/quota.h>
41 #include <ufs/ufs/extattr.h>
42 #include <ufs/ffs/ffs_extern.h>
44 #include <geom/geom.h>
45 #include <geom/geom_dbg.h>
46 #include <geom/label/g_label.h>
48 #define G_LABEL_UFS_VOLUME 0
49 #define G_LABEL_UFS_ID 1
52 * G_LABEL_UFS_CMP returns true if difference between provider mediasize
53 * and filesystem size is less than G_LABEL_UFS_MAXDIFF sectors
55 #define G_LABEL_UFS_CMP(prov, fsys, size) \
56 ( abs( ((fsys)->size) - ( (prov)->mediasize / (fsys)->fs_fsize )) \
57 < G_LABEL_UFS_MAXDIFF )
58 #define G_LABEL_UFS_MAXDIFF 0x100
61 * Try to find a superblock on the provider. If successful, then
62 * check that the size in the superblock corresponds to the size
63 * of the underlying provider. Finally, look for a volume label
64 * and create an appropriate provider based on that.
67 g_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what)
69 struct g_provider *pp;
72 g_topology_assert_not();
77 if (SBLOCKSIZE % pp->sectorsize != 0 || ffs_sbget(cp, &fs,
78 STDSB_NOHASHFAIL, M_GEOM, g_use_g_read_data) != 0) {
80 ("g_label_ufs_taste_common: non-NULL fs %p\n", fs));
85 * Check for magic. We also need to check if file system size
86 * is almost equal to providers size, because sysinstall(8)
87 * used to bogusly put first partition at offset 0
88 * instead of 16, and glabel/ufs would find file system on slice
89 * instead of partition.
91 * In addition, media size can be a bit bigger than file system
92 * size. For instance, mkuzip can append bytes to align data
93 * to large sector size (it improves compression rates).
95 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
96 ( G_LABEL_UFS_CMP(pp, fs, fs_old_size)
97 || G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
99 } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
100 ( G_LABEL_UFS_CMP(pp, fs, fs_size)
101 || G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
106 G_LABEL_DEBUG(1, "%s file system detected on %s.",
107 fs->fs_magic == FS_UFS1_MAGIC ? "UFS1" : "UFS2", pp->name);
109 case G_LABEL_UFS_VOLUME:
110 /* Check for volume label */
111 if (fs->fs_volname[0] != '\0')
112 strlcpy(label, fs->fs_volname, size);
115 if (fs->fs_id[0] != 0 || fs->fs_id[1] != 0)
116 snprintf(label, size, "%08x%08x", fs->fs_id[0],
127 g_label_ufs_volume_taste(struct g_consumer *cp, char *label, size_t size)
130 g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_VOLUME);
134 g_label_ufs_id_taste(struct g_consumer *cp, char *label, size_t size)
137 g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_ID);
140 struct g_label_desc g_label_ufs_volume = {
141 .ld_taste = g_label_ufs_volume_taste,
142 .ld_dirprefix = "ufs/",
146 struct g_label_desc g_label_ufs_id = {
147 .ld_taste = g_label_ufs_id_taste,
148 .ld_dirprefix = "ufsid/",
152 G_LABEL_INIT(ufsid, g_label_ufs_id, "Create device nodes for UFS file system IDs");
153 G_LABEL_INIT(ufs, g_label_ufs_volume, "Create device nodes for UFS volume names");
155 MODULE_DEPEND(g_label, ufs, 1, 1, 1);