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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/cxgbe/if_cxgbe/@/geom/part/g_part_ldm.c |
/*-
* Copyright (c) 2012 Andrey V. Elsukov <ae@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 AUTHOR ``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 AUTHOR 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: release/9.1.0/sys/geom/part/g_part_ldm.c 234406 2012-04-18 04:59:47Z ae $");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/diskmbr.h>
#include <sys/endian.h>
#include <sys/gpt.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/uuid.h>
#include <geom/geom.h>
#include <geom/part/g_part.h>
#include "g_part_if.h"
FEATURE(geom_part_ldm, "GEOM partitioning class for LDM support");
SYSCTL_DECL(_kern_geom_part);
static SYSCTL_NODE(_kern_geom_part, OID_AUTO, ldm, CTLFLAG_RW, 0,
"GEOM_PART_LDM Logical Disk Manager");
static u_int ldm_debug = 0;
TUNABLE_INT("kern.geom.part.ldm.debug", &ldm_debug);
SYSCTL_UINT(_kern_geom_part_ldm, OID_AUTO, debug,
CTLFLAG_RW | CTLFLAG_TUN, &ldm_debug, 0, "Debug level");
/*
* This allows access to mirrored LDM volumes. Since we do not
* doing mirroring here, it is not enabled by default.
*/
static u_int show_mirrors = 0;
TUNABLE_INT("kern.geom.part.ldm.show_mirrors", &show_mirrors);
SYSCTL_UINT(_kern_geom_part_ldm, OID_AUTO, show_mirrors,
CTLFLAG_RW | CTLFLAG_TUN, &show_mirrors, 0, "Show mirrored volumes");
#define LDM_DEBUG(lvl, fmt, ...) do { \
if (ldm_debug >= (lvl)) { \
printf("GEOM_PART: " fmt "\n", __VA_ARGS__); \
} \
} while (0)
#define LDM_DUMP(buf, size) do { \
if (ldm_debug > 1) { \
hexdump(buf, size, NULL, 0); \
} \
} while (0)
/*
* There are internal representations of LDM structures.
*
* We do not keep all fields of on-disk structures, only most useful.
* All numbers in an on-disk structures are in big-endian format.
*/
/*
* Private header is 512 bytes long. There are three copies on each disk.
* Offset and sizes are in sectors. Location of each copy:
* - the first offset is relative to the disk start;
* - the second and third offset are relative to the LDM database start.
*
* On a disk partitioned with GPT, the LDM has not first private header.
*/
#define LDM_PH_MBRINDEX 0
#define LDM_PH_GPTINDEX 2
static const uint64_t ldm_ph_off[] = {6, 1856, 2047};
#define LDM_VERSION_2K 0x2000b
#define LDM_VERSION_VISTA 0x2000c
#define LDM_PH_VERSION_OFF 0x00c
#define LDM_PH_DISKGUID_OFF 0x030
#define LDM_PH_DGGUID_OFF 0x0b0
#define LDM_PH_DGNAME_OFF 0x0f0
#define LDM_PH_START_OFF 0x11b
#define LDM_PH_SIZE_OFF 0x123
#define LDM_PH_DB_OFF 0x12b
#define LDM_PH_DBSIZE_OFF 0x133
#define LDM_PH_TH1_OFF 0x13b
#define LDM_PH_TH2_OFF 0x143
#define LDM_PH_CONFSIZE_OFF 0x153
#define LDM_PH_LOGSIZE_OFF 0x15b
#define LDM_PH_SIGN "PRIVHEAD"
struct ldm_privhdr {
struct uuid disk_guid;
struct uuid dg_guid;
u_char dg_name[32];
uint64_t start; /* logical disk start */
uint64_t size; /* logical disk size */
uint64_t db_offset; /* LDM database start */
#define LDM_DB_SIZE 2048
uint64_t db_size; /* LDM database size */
#define LDM_TH_COUNT 2
uint64_t th_offset[LDM_TH_COUNT]; /* TOC header offsets */
uint64_t conf_size; /* configuration size */
uint64_t log_size; /* size of log */
};
/*
* Table of contents header is 512 bytes long.
* There are two identical copies at offsets from the private header.
* Offsets are relative to the LDM database start.
*/
#define LDM_TH_SIGN "TOCBLOCK"
#define LDM_TH_NAME1 "config"
#define LDM_TH_NAME2 "log"
#define LDM_TH_NAME1_OFF 0x024
#define LDM_TH_CONF_OFF 0x02e
#define LDM_TH_CONFSIZE_OFF 0x036
#define LDM_TH_NAME2_OFF 0x046
#define LDM_TH_LOG_OFF 0x050
#define LDM_TH_LOGSIZE_OFF 0x058
struct ldm_tochdr {
uint64_t conf_offset; /* configuration offset */
uint64_t log_offset; /* log offset */
};
/*
* LDM database header is 512 bytes long.
*/
#define LDM_VMDB_SIGN "VMDB"
#define LDM_DB_LASTSEQ_OFF 0x004
#define LDM_DB_SIZE_OFF 0x008
#define LDM_DB_STATUS_OFF 0x010
#define LDM_DB_VERSION_OFF 0x012
#define LDM_DB_DGNAME_OFF 0x016
#define LDM_DB_DGGUID_OFF 0x035
struct ldm_vmdbhdr {
uint32_t last_seq; /* sequence number of last VBLK */
uint32_t size; /* size of VBLK */
};
/*
* The LDM database configuration section contains VMDB header and
* many VBLKs. Each VBLK represents a disk group, disk partition,
* component or volume.
*
* The most interesting for us are volumes, they are represents
* partitions in the GEOM_PART meaning. But volume VBLK does not
* contain all information needed to create GEOM provider. And we
* should get this information from the related VBLK. This is how
* VBLK releated:
* Volumes <- Components <- Partitions -> Disks
*
* One volume can contain several components. In this case LDM
* does mirroring of volume data to each component.
*
* Also each component can contain several partitions (spanned or
* striped volumes).
*/
struct ldm_component {
uint64_t id; /* object id */
uint64_t vol_id; /* parent volume object id */
int count;
LIST_HEAD(, ldm_partition) partitions;
LIST_ENTRY(ldm_component) entry;
};
struct ldm_volume {
uint64_t id; /* object id */
uint64_t size; /* volume size */
uint8_t number; /* used for ordering */
uint8_t part_type; /* partition type */
int count;
LIST_HEAD(, ldm_component) components;
LIST_ENTRY(ldm_volume) entry;
};
struct ldm_disk {
uint64_t id; /* object id */
struct uuid guid; /* disk guid */
LIST_ENTRY(ldm_disk) entry;
};
#if 0
struct ldm_disk_group {
uint64_t id; /* object id */
struct uuid guid; /* disk group guid */
u_char name[32]; /* disk group name */
LIST_ENTRY(ldm_disk_group) entry;
};
#endif
struct ldm_partition {
uint64_t id; /* object id */
uint64_t disk_id; /* disk object id */
uint64_t comp_id; /* parent component object id */
uint64_t start; /* offset relative to disk start */
uint64_t offset; /* offset for spanned volumes */
uint64_t size; /* partition size */
LIST_ENTRY(ldm_partition) entry;
};
/*
* Each VBLK is 128 bytes long and has standard 16 bytes header.
* Some of VBLK's fields are fixed size, but others has variable size.
* Fields with variable size are prefixed with one byte length marker.
* Some fields are strings and also can have fixed size and variable.
* Strings with fixed size are NULL-terminated, others are not.
* All VBLKs have same several first fields:
* Offset Size Description
* ---------------+---------------+--------------------------
* 0x00 16 standard VBLK header
* 0x10 2 update status
* 0x13 1 VBLK type
* 0x18 PS object id
* 0x18+ PN object name
*
* o Offset 0x18+ means '0x18 + length of all variable-width fields'
* o 'P' in size column means 'prefixed' (variable-width),
* 'S' - string, 'N' - number.
*/
#define LDM_VBLK_SIGN "VBLK"
#define LDM_VBLK_SEQ_OFF 0x04
#define LDM_VBLK_GROUP_OFF 0x08
#define LDM_VBLK_INDEX_OFF 0x0c
#define LDM_VBLK_COUNT_OFF 0x0e
#define LDM_VBLK_TYPE_OFF 0x13
#define LDM_VBLK_OID_OFF 0x18
struct ldm_vblkhdr {
uint32_t seq; /* sequence number */
uint32_t group; /* group number */
uint16_t index; /* index in the group */
uint16_t count; /* number of entries in the group */
};
#define LDM_VBLK_T_COMPONENT 0x32
#define LDM_VBLK_T_PARTITION 0x33
#define LDM_VBLK_T_DISK 0x34
#define LDM_VBLK_T_DISKGROUP 0x35
#define LDM_VBLK_T_DISK4 0x44
#define LDM_VBLK_T_DISKGROUP4 0x45
#define LDM_VBLK_T_VOLUME 0x51
struct ldm_vblk {
uint8_t type; /* VBLK type */
union {
uint64_t id;
struct ldm_volume vol;
struct ldm_component comp;
struct ldm_disk disk;
struct ldm_partition part;
#if 0
struct ldm_disk_group disk_group;
#endif
} u;
LIST_ENTRY(ldm_vblk) entry;
};
/*
* Some VBLKs contains a bit more data than can fit into 128 bytes. These
* VBLKs are called eXtended VBLK. Before parsing, the data from these VBLK
* should be placed into continuous memory buffer. We can determine xVBLK
* by the count field in the standard VBLK header (count > 1).
*/
struct ldm_xvblk {
uint32_t group; /* xVBLK group number */
uint32_t size; /* the total size of xVBLK */
uint8_t map; /* bitmask of currently saved VBLKs */
u_char *data; /* xVBLK data */
LIST_ENTRY(ldm_xvblk) entry;
};
/* The internal representation of LDM database. */
struct ldm_db {
struct ldm_privhdr ph; /* private header */
struct ldm_tochdr th; /* TOC header */
struct ldm_vmdbhdr dh; /* VMDB header */
LIST_HEAD(, ldm_volume) volumes;
LIST_HEAD(, ldm_disk) disks;
LIST_HEAD(, ldm_vblk) vblks;
LIST_HEAD(, ldm_xvblk) xvblks;
};
static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA;
struct g_part_ldm_table {
struct g_part_table base;
uint64_t db_offset;
int is_gpt;
};
struct g_part_ldm_entry {
struct g_part_entry base;
uint8_t type;
};
static int g_part_ldm_add(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_ldm_bootcode(struct g_part_table *, struct g_part_parms *);
static int g_part_ldm_create(struct g_part_table *, struct g_part_parms *);
static int g_part_ldm_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_ldm_dumpconf(struct g_part_table *, struct g_part_entry *,
struct sbuf *, const char *);
static int g_part_ldm_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_ldm_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_ldm_name(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_ldm_probe(struct g_part_table *, struct g_consumer *);
static int g_part_ldm_read(struct g_part_table *, struct g_consumer *);
static int g_part_ldm_setunset(struct g_part_table *, struct g_part_entry *,
const char *, unsigned int);
static const char *g_part_ldm_type(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_ldm_write(struct g_part_table *, struct g_consumer *);
static int g_part_ldm_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static kobj_method_t g_part_ldm_methods[] = {
KOBJMETHOD(g_part_add, g_part_ldm_add),
KOBJMETHOD(g_part_bootcode, g_part_ldm_bootcode),
KOBJMETHOD(g_part_create, g_part_ldm_create),
KOBJMETHOD(g_part_destroy, g_part_ldm_destroy),
KOBJMETHOD(g_part_dumpconf, g_part_ldm_dumpconf),
KOBJMETHOD(g_part_dumpto, g_part_ldm_dumpto),
KOBJMETHOD(g_part_modify, g_part_ldm_modify),
KOBJMETHOD(g_part_resize, g_part_ldm_resize),
KOBJMETHOD(g_part_name, g_part_ldm_name),
KOBJMETHOD(g_part_probe, g_part_ldm_probe),
KOBJMETHOD(g_part_read, g_part_ldm_read),
KOBJMETHOD(g_part_setunset, g_part_ldm_setunset),
KOBJMETHOD(g_part_type, g_part_ldm_type),
KOBJMETHOD(g_part_write, g_part_ldm_write),
{ 0, 0 }
};
static struct g_part_scheme g_part_ldm_scheme = {
"LDM",
g_part_ldm_methods,
sizeof(struct g_part_ldm_table),
.gps_entrysz = sizeof(struct g_part_ldm_entry)
};
G_PART_SCHEME_DECLARE(g_part_ldm);
static struct g_part_ldm_alias {
u_char typ;
int alias;
} ldm_alias_match[] = {
{ DOSPTYP_NTFS, G_PART_ALIAS_MS_NTFS },
{ DOSPTYP_FAT32, G_PART_ALIAS_MS_FAT32 },
{ DOSPTYP_386BSD, G_PART_ALIAS_FREEBSD },
{ DOSPTYP_LDM, G_PART_ALIAS_MS_LDM_DATA },
{ DOSPTYP_LINSWP, G_PART_ALIAS_LINUX_SWAP },
{ DOSPTYP_LINUX, G_PART_ALIAS_LINUX_DATA },
{ DOSPTYP_LINLVM, G_PART_ALIAS_LINUX_LVM },
{ DOSPTYP_LINRAID, G_PART_ALIAS_LINUX_RAID },
};
static u_char*
ldm_privhdr_read(struct g_consumer *cp, uint64_t off, int *error)
{
struct g_provider *pp;
u_char *buf;
pp = cp->provider;
buf = g_read_data(cp, off, pp->sectorsize, error);
if (buf == NULL)
return (NULL);
if (memcmp(buf, LDM_PH_SIGN, strlen(LDM_PH_SIGN)) != 0) {
LDM_DEBUG(1, "%s: invalid LDM private header signature",
pp->name);
g_free(buf);
buf = NULL;
*error = EINVAL;
}
return (buf);
}
static int
ldm_privhdr_parse(struct g_consumer *cp, struct ldm_privhdr *hdr,
const u_char *buf)
{
uint32_t version;
int error;
memset(hdr, 0, sizeof(*hdr));
version = be32dec(buf + LDM_PH_VERSION_OFF);
if (version != LDM_VERSION_2K &&
version != LDM_VERSION_VISTA) {
LDM_DEBUG(0, "%s: unsupported LDM version %u.%u",
cp->provider->name, version >> 16,
version & 0xFFFF);
return (ENXIO);
}
error = parse_uuid(buf + LDM_PH_DISKGUID_OFF, &hdr->disk_guid);
if (error != 0)
return (error);
error = parse_uuid(buf + LDM_PH_DGGUID_OFF, &hdr->dg_guid);
if (error != 0)
return (error);
strncpy(hdr->dg_name, buf + LDM_PH_DGNAME_OFF, sizeof(hdr->dg_name));
hdr->start = be64dec(buf + LDM_PH_START_OFF);
hdr->size = be64dec(buf + LDM_PH_SIZE_OFF);
hdr->db_offset = be64dec(buf + LDM_PH_DB_OFF);
hdr->db_size = be64dec(buf + LDM_PH_DBSIZE_OFF);
hdr->th_offset[0] = be64dec(buf + LDM_PH_TH1_OFF);
hdr->th_offset[1] = be64dec(buf + LDM_PH_TH2_OFF);
hdr->conf_size = be64dec(buf + LDM_PH_CONFSIZE_OFF);
hdr->log_size = be64dec(buf + LDM_PH_LOGSIZE_OFF);
return (0);
}
static int
ldm_privhdr_check(struct ldm_db *db, struct g_consumer *cp, int is_gpt)
{
struct g_consumer *cp2;
struct g_provider *pp;
struct ldm_privhdr hdr;
uint64_t offset, last;
int error, found, i;
u_char *buf;
pp = cp->provider;
if (is_gpt) {
/*
* The last LBA is used in several checks below, for the
* GPT case it should be calculated relative to the whole
* disk.
*/
cp2 = LIST_FIRST(&pp->geom->consumer);
last =
cp2->provider->mediasize / cp2->provider->sectorsize - 1;
} else
last = pp->mediasize / pp->sectorsize - 1;
for (found = 0, i = is_gpt;
i < sizeof(ldm_ph_off) / sizeof(ldm_ph_off[0]); i++) {
offset = ldm_ph_off[i];
/*
* In the GPT case consumer is attached to the LDM metadata
* partition and we don't need add db_offset.
*/
if (!is_gpt)
offset += db->ph.db_offset;
if (i == LDM_PH_MBRINDEX) {
/*
* Prepare to errors and setup new base offset
* to read backup private headers. Assume that LDM
* database is in the last 1Mbyte area.
*/
db->ph.db_offset = last - LDM_DB_SIZE;
}
buf = ldm_privhdr_read(cp, offset * pp->sectorsize, &error);
if (buf == NULL) {
LDM_DEBUG(1, "%s: failed to read private header "
"%d at LBA %ju", pp->name, i, (uintmax_t)offset);
continue;
}
error = ldm_privhdr_parse(cp, &hdr, buf);
if (error != 0) {
LDM_DEBUG(1, "%s: failed to parse private "
"header %d", pp->name, i);
LDM_DUMP(buf, pp->sectorsize);
g_free(buf);
continue;
}
g_free(buf);
if (hdr.start > last ||
hdr.start + hdr.size - 1 > last ||
(hdr.start + hdr.size - 1 > hdr.db_offset && !is_gpt) ||
hdr.db_size != LDM_DB_SIZE ||
hdr.db_offset + LDM_DB_SIZE - 1 > last ||
hdr.th_offset[0] >= LDM_DB_SIZE ||
hdr.th_offset[1] >= LDM_DB_SIZE ||
hdr.conf_size + hdr.log_size >= LDM_DB_SIZE) {
LDM_DEBUG(1, "%s: invalid values in the "
"private header %d", pp->name, i);
LDM_DEBUG(2, "%s: start: %jd, size: %jd, "
"db_offset: %jd, db_size: %jd, th_offset0: %jd, "
"th_offset1: %jd, conf_size: %jd, log_size: %jd, "
"last: %jd", pp->name, hdr.start, hdr.size,
hdr.db_offset, hdr.db_size, hdr.th_offset[0],
hdr.th_offset[1], hdr.conf_size, hdr.log_size,
last);
continue;
}
if (found != 0 && memcmp(&db->ph, &hdr, sizeof(hdr)) != 0) {
LDM_DEBUG(0, "%s: private headers are not equal",
pp->name);
if (i > 1) {
/*
* We have different headers in the LDM.
* We can not trust this metadata.
*/
LDM_DEBUG(0, "%s: refuse LDM metadata",
pp->name);
return (EINVAL);
}
/*
* We already have read primary private header
* and it differs from this backup one.
* Prefer the backup header and save it.
*/
found = 0;
}
if (found == 0)
memcpy(&db->ph, &hdr, sizeof(hdr));
found = 1;
}
if (found == 0) {
LDM_DEBUG(1, "%s: valid LDM private header not found",
pp->name);
return (ENXIO);
}
return (0);
}
static int
ldm_gpt_check(struct ldm_db *db, struct g_consumer *cp)
{
struct g_part_table *gpt;
struct g_part_entry *e;
struct g_consumer *cp2;
int error;
cp2 = LIST_NEXT(cp, consumer);
g_topology_lock();
gpt = cp->provider->geom->softc;
error = 0;
LIST_FOREACH(e, &gpt->gpt_entry, gpe_entry) {
if (cp->provider == e->gpe_pp) {
/* ms-ldm-metadata partition */
if (e->gpe_start != db->ph.db_offset ||
e->gpe_end != db->ph.db_offset + LDM_DB_SIZE - 1)
error++;
} else if (cp2->provider == e->gpe_pp) {
/* ms-ldm-data partition */
if (e->gpe_start != db->ph.start ||
e->gpe_end != db->ph.start + db->ph.size - 1)
error++;
}
if (error != 0) {
LDM_DEBUG(0, "%s: GPT partition %d boundaries "
"do not match with the LDM metadata",
e->gpe_pp->name, e->gpe_index);
error = ENXIO;
break;
}
}
g_topology_unlock();
return (error);
}
static int
ldm_tochdr_check(struct ldm_db *db, struct g_consumer *cp)
{
struct g_provider *pp;
struct ldm_tochdr hdr;
uint64_t offset, conf_size, log_size;
int error, found, i;
u_char *buf;
pp = cp->provider;
for (i = 0, found = 0; i < LDM_TH_COUNT; i++) {
offset = db->ph.db_offset + db->ph.th_offset[i];
buf = g_read_data(cp,
offset * pp->sectorsize, pp->sectorsize, &error);
if (buf == NULL) {
LDM_DEBUG(1, "%s: failed to read TOC header "
"at LBA %ju", pp->name, (uintmax_t)offset);
continue;
}
if (memcmp(buf, LDM_TH_SIGN, strlen(LDM_TH_SIGN)) != 0 ||
memcmp(buf + LDM_TH_NAME1_OFF, LDM_TH_NAME1,
strlen(LDM_TH_NAME1)) != 0 ||
memcmp(buf + LDM_TH_NAME2_OFF, LDM_TH_NAME2,
strlen(LDM_TH_NAME2)) != 0) {
LDM_DEBUG(1, "%s: failed to parse TOC header "
"at LBA %ju", pp->name, (uintmax_t)offset);
LDM_DUMP(buf, pp->sectorsize);
g_free(buf);
continue;
}
hdr.conf_offset = be64dec(buf + LDM_TH_CONF_OFF);
hdr.log_offset = be64dec(buf + LDM_TH_LOG_OFF);
conf_size = be64dec(buf + LDM_TH_CONFSIZE_OFF);
log_size = be64dec(buf + LDM_TH_LOGSIZE_OFF);
if (conf_size != db->ph.conf_size ||
hdr.conf_offset + conf_size >= LDM_DB_SIZE ||
log_size != db->ph.log_size ||
hdr.log_offset + log_size >= LDM_DB_SIZE) {
LDM_DEBUG(1, "%s: invalid values in the "
"TOC header at LBA %ju", pp->name,
(uintmax_t)offset);
LDM_DUMP(buf, pp->sectorsize);
g_free(buf);
continue;
}
g_free(buf);
if (found == 0)
memcpy(&db->th, &hdr, sizeof(hdr));
found = 1;
}
if (found == 0) {
LDM_DEBUG(0, "%s: valid LDM TOC header not found.",
pp->name);
return (ENXIO);
}
return (0);
}
static int
ldm_vmdbhdr_check(struct ldm_db *db, struct g_consumer *cp)
{
struct g_provider *pp;
struct uuid dg_guid;
uint64_t offset;
uint32_t version;
int error;
u_char *buf;
pp = cp->provider;
offset = db->ph.db_offset + db->th.conf_offset;
buf = g_read_data(cp, offset * pp->sectorsize, pp->sectorsize,
&error);
if (buf == NULL) {
LDM_DEBUG(0, "%s: failed to read VMDB header at "
"LBA %ju", pp->name, (uintmax_t)offset);
return (error);
}
if (memcmp(buf, LDM_VMDB_SIGN, strlen(LDM_VMDB_SIGN)) != 0) {
g_free(buf);
LDM_DEBUG(0, "%s: failed to parse VMDB header at "
"LBA %ju", pp->name, (uintmax_t)offset);
return (ENXIO);
}
/* Check version. */
version = be32dec(buf + LDM_DB_VERSION_OFF);
if (version != 0x4000A) {
g_free(buf);
LDM_DEBUG(0, "%s: unsupported VMDB version %u.%u",
pp->name, version >> 16, version & 0xFFFF);
return (ENXIO);
}
/*
* Check VMDB update status:
* 1 - in a consistent state;
* 2 - in a creation phase;
* 3 - in a deletion phase;
*/
if (be16dec(buf + LDM_DB_STATUS_OFF) != 1) {
g_free(buf);
LDM_DEBUG(0, "%s: VMDB is not in a consistent state",
pp->name);
return (ENXIO);
}
db->dh.last_seq = be32dec(buf + LDM_DB_LASTSEQ_OFF);
db->dh.size = be32dec(buf + LDM_DB_SIZE_OFF);
error = parse_uuid(buf + LDM_DB_DGGUID_OFF, &dg_guid);
/* Compare disk group name and guid from VMDB and private headers */
if (error != 0 || db->dh.size == 0 ||
pp->sectorsize % db->dh.size != 0 ||
strncmp(buf + LDM_DB_DGNAME_OFF, db->ph.dg_name, 31) != 0 ||
memcmp(&dg_guid, &db->ph.dg_guid, sizeof(dg_guid)) != 0 ||
db->dh.size * db->dh.last_seq >
db->ph.conf_size * pp->sectorsize) {
LDM_DEBUG(0, "%s: invalid values in the VMDB header",
pp->name);
LDM_DUMP(buf, pp->sectorsize);
g_free(buf);
return (EINVAL);
}
g_free(buf);
return (0);
}
static int
ldm_xvblk_handle(struct ldm_db *db, struct ldm_vblkhdr *vh, const u_char *p)
{
struct ldm_xvblk *blk;
size_t size;
size = db->dh.size - 16;
LIST_FOREACH(blk, &db->xvblks, entry)
if (blk->group == vh->group)
break;
if (blk == NULL) {
blk = g_malloc(sizeof(*blk), M_WAITOK | M_ZERO);
blk->group = vh->group;
blk->size = size * vh->count + 16;
blk->data = g_malloc(blk->size, M_WAITOK | M_ZERO);
blk->map = 0xFF << vh->count;
LIST_INSERT_HEAD(&db->xvblks, blk, entry);
}
if ((blk->map & (1 << vh->index)) != 0) {
/* Block with given index has been already saved. */
return (EINVAL);
}
/* Copy the data block to the place related to index. */
memcpy(blk->data + size * vh->index + 16, p + 16, size);
blk->map |= 1 << vh->index;
return (0);
}
/* Read the variable-width numeric field and return new offset */
static int
ldm_vnum_get(const u_char *buf, int offset, uint64_t *result, size_t range)
{
uint64_t num;
uint8_t len;
len = buf[offset++];
if (len > sizeof(uint64_t) || len + offset >= range)
return (-1);
for (num = 0; len > 0; len--)
num = (num << 8) | buf[offset++];
*result = num;
return (offset);
}
/* Read the variable-width string and return new offset */
static int
ldm_vstr_get(const u_char *buf, int offset, u_char *result,
size_t maxlen, size_t range)
{
uint8_t len;
len = buf[offset++];
if (len >= maxlen || len + offset >= range)
return (-1);
memcpy(result, buf + offset, len);
result[len] = '\0';
return (offset + len);
}
/* Just skip the variable-width variable and return new offset */
static int
ldm_vparm_skip(const u_char *buf, int offset, size_t range)
{
uint8_t len;
len = buf[offset++];
if (offset + len >= range)
return (-1);
return (offset + len);
}
static int
ldm_vblk_handle(struct ldm_db *db, const u_char *p, size_t size)
{
struct ldm_vblk *blk;
struct ldm_volume *volume, *last;
const char *errstr;
u_char vstr[64];
int error, offset;
blk = g_malloc(sizeof(*blk), M_WAITOK | M_ZERO);
blk->type = p[LDM_VBLK_TYPE_OFF];
offset = ldm_vnum_get(p, LDM_VBLK_OID_OFF, &blk->u.id, size);
if (offset < 0) {
errstr = "object id";
goto fail;
}
offset = ldm_vstr_get(p, offset, vstr, sizeof(vstr), size);
if (offset < 0) {
errstr = "object name";
goto fail;
}
switch (blk->type) {
/*
* Component VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+ PS volume state
* 0x18+5 PN component children count
* 0x1D+16 PN parent's volume object id
* 0x2D+1 PN stripe size
*/
case LDM_VBLK_T_COMPONENT:
offset = ldm_vparm_skip(p, offset, size);
if (offset < 0) {
errstr = "volume state";
goto fail;
}
offset = ldm_vparm_skip(p, offset + 5, size);
if (offset < 0) {
errstr = "children count";
goto fail;
}
offset = ldm_vnum_get(p, offset + 16,
&blk->u.comp.vol_id, size);
if (offset < 0) {
errstr = "volume id";
goto fail;
}
break;
/*
* Partition VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+12 8 partition start offset
* 0x18+20 8 volume offset
* 0x18+28 PN partition size
* 0x34+ PN parent's component object id
* 0x34+ PN disk's object id
*/
case LDM_VBLK_T_PARTITION:
if (offset + 28 >= size) {
errstr = "too small buffer";
goto fail;
}
blk->u.part.start = be64dec(p + offset + 12);
blk->u.part.offset = be64dec(p + offset + 20);
offset = ldm_vnum_get(p, offset + 28, &blk->u.part.size, size);
if (offset < 0) {
errstr = "partition size";
goto fail;
}
offset = ldm_vnum_get(p, offset, &blk->u.part.comp_id, size);
if (offset < 0) {
errstr = "component id";
goto fail;
}
offset = ldm_vnum_get(p, offset, &blk->u.part.disk_id, size);
if (offset < 0) {
errstr = "disk id";
goto fail;
}
break;
/*
* Disk VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+ PS disk GUID
*/
case LDM_VBLK_T_DISK:
errstr = "disk guid";
offset = ldm_vstr_get(p, offset, vstr, sizeof(vstr), size);
if (offset < 0)
goto fail;
error = parse_uuid(vstr, &blk->u.disk.guid);
if (error != 0)
goto fail;
LIST_INSERT_HEAD(&db->disks, &blk->u.disk, entry);
break;
/*
* Disk group VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+ PS disk group GUID
*/
case LDM_VBLK_T_DISKGROUP:
#if 0
strncpy(blk->u.disk_group.name, vstr,
sizeof(blk->u.disk_group.name));
offset = ldm_vstr_get(p, offset, vstr, sizeof(vstr), size);
if (offset < 0) {
errstr = "disk group guid";
goto fail;
}
error = parse_uuid(name, &blk->u.disk_group.guid);
if (error != 0) {
errstr = "disk group guid";
goto fail;
}
LIST_INSERT_HEAD(&db->groups, &blk->u.disk_group, entry);
#endif
break;
/*
* Disk VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+ 16 disk GUID
*/
case LDM_VBLK_T_DISK4:
be_uuid_dec(p + offset, &blk->u.disk.guid);
LIST_INSERT_HEAD(&db->disks, &blk->u.disk, entry);
break;
/*
* Disk group VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+ 16 disk GUID
*/
case LDM_VBLK_T_DISKGROUP4:
#if 0
strncpy(blk->u.disk_group.name, vstr,
sizeof(blk->u.disk_group.name));
be_uuid_dec(p + offset, &blk->u.disk.guid);
LIST_INSERT_HEAD(&db->groups, &blk->u.disk_group, entry);
#endif
break;
/*
* Volume VBLK fields:
* Offset Size Description
* ------------+-------+------------------------
* 0x18+ PS volume type
* 0x18+ PS unknown
* 0x18+ 14(S) volume state
* 0x18+16 1 volume number
* 0x18+21 PN volume children count
* 0x2D+16 PN volume size
* 0x3D+4 1 partition type
*/
case LDM_VBLK_T_VOLUME:
offset = ldm_vparm_skip(p, offset, size);
if (offset < 0) {
errstr = "volume type";
goto fail;
}
offset = ldm_vparm_skip(p, offset, size);
if (offset < 0) {
errstr = "unknown param";
goto fail;
}
if (offset + 21 >= size) {
errstr = "too small buffer";
goto fail;
}
blk->u.vol.number = p[offset + 16];
offset = ldm_vparm_skip(p, offset + 21, size);
if (offset < 0) {
errstr = "children count";
goto fail;
}
offset = ldm_vnum_get(p, offset + 16, &blk->u.vol.size, size);
if (offset < 0) {
errstr = "volume size";
goto fail;
}
if (offset + 4 >= size) {
errstr = "too small buffer";
goto fail;
}
blk->u.vol.part_type = p[offset + 4];
/* keep volumes ordered by volume number */
last = NULL;
LIST_FOREACH(volume, &db->volumes, entry) {
if (volume->number > blk->u.vol.number)
break;
last = volume;
}
if (last != NULL)
LIST_INSERT_AFTER(last, &blk->u.vol, entry);
else
LIST_INSERT_HEAD(&db->volumes, &blk->u.vol, entry);
break;
default:
LDM_DEBUG(1, "unknown VBLK type 0x%02x\n", blk->type);
LDM_DUMP(p, size);
}
LIST_INSERT_HEAD(&db->vblks, blk, entry);
return (0);
fail:
LDM_DEBUG(0, "failed to parse '%s' in VBLK of type 0x%02x\n",
errstr, blk->type);
LDM_DUMP(p, size);
g_free(blk);
return (EINVAL);
}
static void
ldm_vmdb_free(struct ldm_db *db)
{
struct ldm_vblk *vblk;
struct ldm_xvblk *xvblk;
while (!LIST_EMPTY(&db->xvblks)) {
xvblk = LIST_FIRST(&db->xvblks);
LIST_REMOVE(xvblk, entry);
g_free(xvblk->data);
g_free(xvblk);
}
while (!LIST_EMPTY(&db->vblks)) {
vblk = LIST_FIRST(&db->vblks);
LIST_REMOVE(vblk, entry);
g_free(vblk);
}
}
static int
ldm_vmdb_parse(struct ldm_db *db, struct g_consumer *cp)
{
struct g_provider *pp;
struct ldm_vblk *vblk;
struct ldm_xvblk *xvblk;
struct ldm_volume *volume;
struct ldm_component *comp;
struct ldm_vblkhdr vh;
u_char *buf, *p;
size_t size, n, sectors;
uint64_t offset;
int error;
pp = cp->provider;
size = (db->dh.last_seq * db->dh.size +
pp->sectorsize - 1) / pp->sectorsize;
size -= 1; /* one sector takes vmdb header */
for (n = 0; n < size; n += MAXPHYS / pp->sectorsize) {
offset = db->ph.db_offset + db->th.conf_offset + n + 1;
sectors = (size - n) > (MAXPHYS / pp->sectorsize) ?
MAXPHYS / pp->sectorsize: size - n;
/* read VBLKs */
buf = g_read_data(cp, offset * pp->sectorsize,
sectors * pp->sectorsize, &error);
if (buf == NULL) {
LDM_DEBUG(0, "%s: failed to read VBLK\n",
pp->name);
goto fail;
}
for (p = buf; p < buf + sectors * pp->sectorsize;
p += db->dh.size) {
if (memcmp(p, LDM_VBLK_SIGN,
strlen(LDM_VBLK_SIGN)) != 0) {
LDM_DEBUG(0, "%s: no VBLK signature\n",
pp->name);
LDM_DUMP(p, db->dh.size);
goto fail;
}
vh.seq = be32dec(p + LDM_VBLK_SEQ_OFF);
vh.group = be32dec(p + LDM_VBLK_GROUP_OFF);
/* skip empty blocks */
if (vh.seq == 0 || vh.group == 0)
continue;
vh.index = be16dec(p + LDM_VBLK_INDEX_OFF);
vh.count = be16dec(p + LDM_VBLK_COUNT_OFF);
if (vh.count == 0 || vh.count > 4 ||
vh.seq > db->dh.last_seq) {
LDM_DEBUG(0, "%s: invalid values "
"in the VBLK header\n", pp->name);
LDM_DUMP(p, db->dh.size);
goto fail;
}
if (vh.count > 1) {
error = ldm_xvblk_handle(db, &vh, p);
if (error != 0) {
LDM_DEBUG(0, "%s: xVBLK "
"is corrupted\n", pp->name);
LDM_DUMP(p, db->dh.size);
goto fail;
}
continue;
}
if (be16dec(p + 16) != 0)
LDM_DEBUG(1, "%s: VBLK update"
" status is %u\n", pp->name,
be16dec(p + 16));
error = ldm_vblk_handle(db, p, db->dh.size);
if (error != 0)
goto fail;
}
g_free(buf);
buf = NULL;
}
/* Parse xVBLKs */
while (!LIST_EMPTY(&db->xvblks)) {
xvblk = LIST_FIRST(&db->xvblks);
if (xvblk->map == 0xFF) {
error = ldm_vblk_handle(db, xvblk->data, xvblk->size);
if (error != 0)
goto fail;
} else {
LDM_DEBUG(0, "%s: incomplete or corrupt "
"xVBLK found\n", pp->name);
goto fail;
}
LIST_REMOVE(xvblk, entry);
g_free(xvblk->data);
g_free(xvblk);
}
/* construct all VBLKs relations */
LIST_FOREACH(volume, &db->volumes, entry) {
LIST_FOREACH(vblk, &db->vblks, entry)
if (vblk->type == LDM_VBLK_T_COMPONENT &&
vblk->u.comp.vol_id == volume->id) {
LIST_INSERT_HEAD(&volume->components,
&vblk->u.comp, entry);
volume->count++;
}
LIST_FOREACH(comp, &volume->components, entry)
LIST_FOREACH(vblk, &db->vblks, entry)
if (vblk->type == LDM_VBLK_T_PARTITION &&
vblk->u.part.comp_id == comp->id) {
LIST_INSERT_HEAD(&comp->partitions,
&vblk->u.part, entry);
comp->count++;
}
}
return (0);
fail:
ldm_vmdb_free(db);
g_free(buf);
return (ENXIO);
}
static int
g_part_ldm_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
struct g_part_parms *gpp)
{
return (ENOSYS);
}
static int
g_part_ldm_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
{
return (ENOSYS);
}
static int
g_part_ldm_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
return (ENOSYS);
}
static int
g_part_ldm_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_ldm_table *table;
struct g_provider *pp;
table = (struct g_part_ldm_table *)basetable;
/*
* To destroy LDM on a disk partitioned with GPT we should delete
* ms-ldm-metadata partition, but we can't do this via standard
* GEOM_PART method.
*/
if (table->is_gpt)
return (ENOSYS);
pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
/*
* To destroy LDM we should wipe MBR, first private header and
* backup private headers.
*/
basetable->gpt_smhead = (1 << ldm_ph_off[0]) | 1;
/*
* Don't touch last backup private header when LDM database is
* not located in the last 1MByte area.
* XXX: can't remove all blocks.
*/
if (table->db_offset + LDM_DB_SIZE ==
pp->mediasize / pp->sectorsize)
basetable->gpt_smtail = 1;
return (0);
}
static void
g_part_ldm_dumpconf(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct sbuf *sb, const char *indent)
{
struct g_part_ldm_entry *entry;
entry = (struct g_part_ldm_entry *)baseentry;
if (indent == NULL) {
/* conftxt: libdisk compatibility */
sbuf_printf(sb, " xs LDM xt %u", entry->type);
} else if (entry != NULL) {
/* confxml: partition entry information */
sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
entry->type);
} else {
/* confxml: scheme information */
}
}
static int
g_part_ldm_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
{
return (0);
}
static int
g_part_ldm_modify(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
return (ENOSYS);
}
static int
g_part_ldm_resize(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
return (ENOSYS);
}
static const char *
g_part_ldm_name(struct g_part_table *table, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
snprintf(buf, bufsz, "s%d", baseentry->gpe_index);
return (buf);
}
static int
ldm_gpt_probe(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_part_ldm_table *table;
struct g_part_table *gpt;
struct g_part_entry *entry;
struct g_consumer *cp2;
struct gpt_ent *part;
u_char *buf;
int error;
/*
* XXX: We use some knowlege about GEOM_PART_GPT internal
* structures, but it is easier than parse GPT by himself.
*/
g_topology_lock();
gpt = cp->provider->geom->softc;
LIST_FOREACH(entry, &gpt->gpt_entry, gpe_entry) {
part = (struct gpt_ent *)(entry + 1);
/* Search ms-ldm-metadata partition */
if (memcmp(&part->ent_type,
&gpt_uuid_ms_ldm_metadata, sizeof(struct uuid)) != 0 ||
entry->gpe_end - entry->gpe_start < LDM_DB_SIZE - 1)
continue;
/* Create new consumer and attach it to metadata partition */
cp2 = g_new_consumer(cp->geom);
error = g_attach(cp2, entry->gpe_pp);
if (error != 0) {
g_destroy_consumer(cp2);
g_topology_unlock();
return (ENXIO);
}
error = g_access(cp2, 1, 0, 0);
if (error != 0) {
g_detach(cp2);
g_destroy_consumer(cp2);
g_topology_unlock();
return (ENXIO);
}
g_topology_unlock();
LDM_DEBUG(2, "%s: LDM metadata partition %s found in the GPT",
cp->provider->name, cp2->provider->name);
/* Read the LDM private header */
buf = ldm_privhdr_read(cp2,
ldm_ph_off[LDM_PH_GPTINDEX] * cp2->provider->sectorsize,
&error);
if (buf != NULL) {
table = (struct g_part_ldm_table *)basetable;
table->is_gpt = 1;
g_free(buf);
return (G_PART_PROBE_PRI_HIGH);
}
/* second consumer is no longer needed. */
g_topology_lock();
g_access(cp2, -1, 0, 0);
g_detach(cp2);
g_destroy_consumer(cp2);
break;
}
g_topology_unlock();
return (ENXIO);
}
static int
g_part_ldm_probe(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
u_char *buf, type[64];
int error, idx;
pp = cp->provider;
if (pp->sectorsize != 512)
return (ENXIO);
error = g_getattr("PART::scheme", cp, &type);
if (error == 0 && strcmp(type, "GPT") == 0) {
if (g_getattr("PART::type", cp, &type) != 0 ||
strcmp(type, "ms-ldm-data") != 0)
return (ENXIO);
error = ldm_gpt_probe(basetable, cp);
return (error);
}
if (basetable->gpt_depth != 0)
return (ENXIO);
/* LDM has 1M metadata area */
if (pp->mediasize <= 1024 * 1024)
return (ENOSPC);
/* Check that there's a MBR */
buf = g_read_data(cp, 0, pp->sectorsize, &error);
if (buf == NULL)
return (error);
if (le16dec(buf + DOSMAGICOFFSET) != DOSMAGIC) {
g_free(buf);
return (ENXIO);
}
error = ENXIO;
/* Check that we have LDM partitions in the MBR */
for (idx = 0; idx < NDOSPART && error != 0; idx++) {
if (buf[DOSPARTOFF + idx * DOSPARTSIZE + 4] == DOSPTYP_LDM)
error = 0;
}
g_free(buf);
if (error == 0) {
LDM_DEBUG(2, "%s: LDM data partitions found in MBR",
pp->name);
/* Read the LDM private header */
buf = ldm_privhdr_read(cp,
ldm_ph_off[LDM_PH_MBRINDEX] * pp->sectorsize, &error);
if (buf == NULL)
return (error);
g_free(buf);
return (G_PART_PROBE_PRI_HIGH);
}
return (error);
}
static int
g_part_ldm_read(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_part_ldm_table *table;
struct g_part_ldm_entry *entry;
struct g_consumer *cp2;
struct ldm_component *comp;
struct ldm_partition *part;
struct ldm_volume *vol;
struct ldm_disk *disk;
struct ldm_db db;
int error, index, skipped;
table = (struct g_part_ldm_table *)basetable;
memset(&db, 0, sizeof(db));
cp2 = cp; /* ms-ldm-data */
if (table->is_gpt)
cp = LIST_FIRST(&cp->geom->consumer); /* ms-ldm-metadata */
/* Read and parse LDM private headers. */
error = ldm_privhdr_check(&db, cp, table->is_gpt);
if (error != 0)
goto gpt_cleanup;
basetable->gpt_first = table->is_gpt ? 0: db.ph.start;
basetable->gpt_last = basetable->gpt_first + db.ph.size - 1;
table->db_offset = db.ph.db_offset;
/* Make additional checks for GPT */
if (table->is_gpt) {
error = ldm_gpt_check(&db, cp);
if (error != 0)
goto gpt_cleanup;
/*
* Now we should reset database offset to zero, because our
* consumer cp is attached to the ms-ldm-metadata partition
* and we don't need add db_offset to read from it.
*/
db.ph.db_offset = 0;
}
/* Read and parse LDM TOC headers. */
error = ldm_tochdr_check(&db, cp);
if (error != 0)
goto gpt_cleanup;
/* Read and parse LDM VMDB header. */
error = ldm_vmdbhdr_check(&db, cp);
if (error != 0)
goto gpt_cleanup;
error = ldm_vmdb_parse(&db, cp);
/*
* For the GPT case we must detach and destroy
* second consumer before return.
*/
gpt_cleanup:
if (table->is_gpt) {
g_topology_lock();
g_access(cp, -1, 0, 0);
g_detach(cp);
g_destroy_consumer(cp);
g_topology_unlock();
cp = cp2;
}
if (error != 0)
return (error);
/* Search current disk in the disk list. */
LIST_FOREACH(disk, &db.disks, entry)
if (memcmp(&disk->guid, &db.ph.disk_guid,
sizeof(struct uuid)) == 0)
break;
if (disk == NULL) {
LDM_DEBUG(1, "%s: no LDM volumes on this disk",
cp->provider->name);
ldm_vmdb_free(&db);
return (ENXIO);
}
index = 1;
LIST_FOREACH(vol, &db.volumes, entry) {
LIST_FOREACH(comp, &vol->components, entry) {
/* Skip volumes from different disks. */
part = LIST_FIRST(&comp->partitions);
if (part->disk_id != disk->id)
continue;
skipped = 0;
/* We don't support spanned and striped volumes. */
if (comp->count > 1 || part->offset != 0) {
LDM_DEBUG(1, "%s: LDM volume component "
"%ju has %u partitions. Skipped",
cp->provider->name, (uintmax_t)comp->id,
comp->count);
skipped = 1;
}
/*
* Allow mirrored volumes only when they are explicitly
* allowed with kern.geom.part.ldm.show_mirrors=1.
*/
if (vol->count > 1 && show_mirrors == 0) {
LDM_DEBUG(1, "%s: LDM volume %ju has %u "
"components. Skipped",
cp->provider->name, (uintmax_t)vol->id,
vol->count);
skipped = 1;
}
entry = (struct g_part_ldm_entry *)g_part_new_entry(
basetable, index++,
basetable->gpt_first + part->start,
basetable->gpt_first + part->start +
part->size - 1);
/*
* Mark skipped partition as ms-ldm-data partition.
* We do not support them, but it is better to show
* that we have something there, than just show
* free space.
*/
if (skipped == 0)
entry->type = vol->part_type;
else
entry->type = DOSPTYP_LDM;
LDM_DEBUG(1, "%s: new volume id: %ju, start: %ju,"
" end: %ju, type: 0x%02x\n", cp->provider->name,
(uintmax_t)part->id,(uintmax_t)part->start +
basetable->gpt_first, (uintmax_t)part->start +
part->size + basetable->gpt_first - 1,
vol->part_type);
}
}
ldm_vmdb_free(&db);
return (error);
}
static int
g_part_ldm_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
const char *attrib, unsigned int set)
{
return (ENOSYS);
}
static const char *
g_part_ldm_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
struct g_part_ldm_entry *entry;
int i;
entry = (struct g_part_ldm_entry *)baseentry;
for (i = 0;
i < sizeof(ldm_alias_match) / sizeof(ldm_alias_match[0]); i++) {
if (ldm_alias_match[i].typ == entry->type)
return (g_part_alias_name(ldm_alias_match[i].alias));
}
snprintf(buf, bufsz, "!%d", entry->type);
return (buf);
}
static int
g_part_ldm_write(struct g_part_table *basetable, struct g_consumer *cp)
{
return (ENOSYS);
}