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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2002, 2003 Gordon Tetlow
* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ffs/ffs_extern.h>
#include <geom/geom.h>
#include <geom/geom_dbg.h>
#include <geom/label/g_label.h>
#define G_LABEL_UFS_VOLUME_DIR "ufs"
#define G_LABEL_UFS_ID_DIR "ufsid"
#define G_LABEL_UFS_VOLUME 0
#define G_LABEL_UFS_ID 1
/*
* G_LABEL_UFS_CMP returns true if difference between provider mediasize
* and filesystem size is less than G_LABEL_UFS_MAXDIFF sectors
*/
#define G_LABEL_UFS_CMP(prov, fsys, size) \
( abs( ((fsys)->size) - ( (prov)->mediasize / (fsys)->fs_fsize )) \
< G_LABEL_UFS_MAXDIFF )
#define G_LABEL_UFS_MAXDIFF 0x100
/*
* Try to find a superblock on the provider. If successful, then
* check that the size in the superblock corresponds to the size
* of the underlying provider. Finally, look for a volume label
* and create an appropriate provider based on that.
*/
static void
g_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what)
{
struct g_provider *pp;
struct fs *fs;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
fs = NULL;
if (SBLOCKSIZE % pp->sectorsize != 0 || ffs_sbget(cp, &fs,
STDSB_NOHASHFAIL, M_GEOM, g_use_g_read_data) != 0) {
KASSERT(fs == NULL,
("g_label_ufs_taste_common: non-NULL fs %p\n", fs));
return;
}
/*
* Check for magic. We also need to check if file system size
* is almost equal to providers size, because sysinstall(8)
* used to bogusly put first partition at offset 0
* instead of 16, and glabel/ufs would find file system on slice
* instead of partition.
*
* In addition, media size can be a bit bigger than file system
* size. For instance, mkuzip can append bytes to align data
* to large sector size (it improves compression rates).
*/
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
( G_LABEL_UFS_CMP(pp, fs, fs_old_size)
|| G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
/* Valid UFS1. */
} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
( G_LABEL_UFS_CMP(pp, fs, fs_size)
|| G_LABEL_UFS_CMP(pp, fs, fs_providersize))) {
/* Valid UFS2. */
} else {
goto out;
}
G_LABEL_DEBUG(1, "%s file system detected on %s.",
fs->fs_magic == FS_UFS1_MAGIC ? "UFS1" : "UFS2", pp->name);
switch (what) {
case G_LABEL_UFS_VOLUME:
/* Check for volume label */
if (fs->fs_volname[0] != '\0')
strlcpy(label, fs->fs_volname, size);
break;
case G_LABEL_UFS_ID:
if (fs->fs_id[0] != 0 || fs->fs_id[1] != 0)
snprintf(label, size, "%08x%08x", fs->fs_id[0],
fs->fs_id[1]);
break;
}
out:
g_free(fs->fs_csp);
g_free(fs->fs_si);
g_free(fs);
}
static void
g_label_ufs_volume_taste(struct g_consumer *cp, char *label, size_t size)
{
g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_VOLUME);
}
static void
g_label_ufs_id_taste(struct g_consumer *cp, char *label, size_t size)
{
g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_ID);
}
struct g_label_desc g_label_ufs_volume = {
.ld_taste = g_label_ufs_volume_taste,
.ld_dir = G_LABEL_UFS_VOLUME_DIR,
.ld_enabled = 1
};
struct g_label_desc g_label_ufs_id = {
.ld_taste = g_label_ufs_id_taste,
.ld_dir = G_LABEL_UFS_ID_DIR,
.ld_enabled = 1
};
G_LABEL_INIT(ufsid, g_label_ufs_id, "Create device nodes for UFS file system IDs");
G_LABEL_INIT(ufs, g_label_ufs_volume, "Create device nodes for UFS volume names");
MODULE_DEPEND(g_label, ufs, 1, 1, 1);
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