diff options
Diffstat (limited to 'sys/geom/part/g_part_bsd.c')
| -rw-r--r-- | sys/geom/part/g_part_bsd.c | 539 |
1 files changed, 539 insertions, 0 deletions
diff --git a/sys/geom/part/g_part_bsd.c b/sys/geom/part/g_part_bsd.c new file mode 100644 index 000000000000..51912bedbdc2 --- /dev/null +++ b/sys/geom/part/g_part_bsd.c @@ -0,0 +1,539 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2007 Marcel Moolenaar + * 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/param.h> +#include <sys/bio.h> +#include <sys/disklabel.h> +#include <sys/endian.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 <geom/geom.h> +#include <geom/part/g_part.h> + +#include "g_part_if.h" + +#define BOOT1_SIZE 512 +#define LABEL_SIZE 512 +#define BOOT2_OFF (BOOT1_SIZE + LABEL_SIZE) +#define BOOT2_SIZE (BBSIZE - BOOT2_OFF) + +FEATURE(geom_part_bsd, "GEOM partitioning class for BSD disklabels"); + +struct g_part_bsd_table { + struct g_part_table base; + u_char *bbarea; + uint32_t offset; +}; + +struct g_part_bsd_entry { + struct g_part_entry base; + struct partition part; +}; + +static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *, + struct g_part_parms *); +static int g_part_bsd_bootcode(struct g_part_table *, struct g_part_parms *); +static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *); +static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *); +static void g_part_bsd_dumpconf(struct g_part_table *, struct g_part_entry *, + struct sbuf *, const char *); +static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *); +static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *, + struct g_part_parms *); +static const char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *, + char *, size_t); +static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *); +static int g_part_bsd_read(struct g_part_table *, struct g_consumer *); +static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *, + char *, size_t); +static int g_part_bsd_write(struct g_part_table *, struct g_consumer *); +static int g_part_bsd_resize(struct g_part_table *, struct g_part_entry *, + struct g_part_parms *); + +static kobj_method_t g_part_bsd_methods[] = { + KOBJMETHOD(g_part_add, g_part_bsd_add), + KOBJMETHOD(g_part_bootcode, g_part_bsd_bootcode), + KOBJMETHOD(g_part_create, g_part_bsd_create), + KOBJMETHOD(g_part_destroy, g_part_bsd_destroy), + KOBJMETHOD(g_part_dumpconf, g_part_bsd_dumpconf), + KOBJMETHOD(g_part_dumpto, g_part_bsd_dumpto), + KOBJMETHOD(g_part_modify, g_part_bsd_modify), + KOBJMETHOD(g_part_resize, g_part_bsd_resize), + KOBJMETHOD(g_part_name, g_part_bsd_name), + KOBJMETHOD(g_part_probe, g_part_bsd_probe), + KOBJMETHOD(g_part_read, g_part_bsd_read), + KOBJMETHOD(g_part_type, g_part_bsd_type), + KOBJMETHOD(g_part_write, g_part_bsd_write), + { 0, 0 } +}; + +static struct g_part_scheme g_part_bsd_scheme = { + "BSD", + g_part_bsd_methods, + sizeof(struct g_part_bsd_table), + .gps_entrysz = sizeof(struct g_part_bsd_entry), + .gps_minent = 8, + .gps_defent = 8, + .gps_maxent = 20, /* Only 22 entries fit in 512 byte sectors */ + .gps_bootcodesz = BBSIZE, +}; +G_PART_SCHEME_DECLARE(g_part_bsd); +MODULE_VERSION(geom_part_bsd, 0); + +static struct g_part_bsd_alias { + uint8_t type; + int alias; +} bsd_alias_match[] = { + { FS_BSDFFS, G_PART_ALIAS_FREEBSD_UFS }, + { FS_SWAP, G_PART_ALIAS_FREEBSD_SWAP }, + { FS_ZFS, G_PART_ALIAS_FREEBSD_ZFS }, + { FS_VINUM, G_PART_ALIAS_FREEBSD_VINUM }, + { FS_NANDFS, G_PART_ALIAS_FREEBSD_NANDFS }, + { FS_HAMMER, G_PART_ALIAS_DFBSD_HAMMER }, + { FS_HAMMER2, G_PART_ALIAS_DFBSD_HAMMER2 }, +}; + +static int +bsd_parse_type(const char *type, uint8_t *fstype) +{ + const char *alias; + char *endp; + long lt; + int i; + + if (type[0] == '!') { + lt = strtol(type + 1, &endp, 0); + if (type[1] == '\0' || *endp != '\0' || lt < 0 || lt >= 256) + return (EINVAL); + *fstype = (u_int)lt; + return (0); + } + for (i = 0; i < nitems(bsd_alias_match); i++) { + alias = g_part_alias_name(bsd_alias_match[i].alias); + if (strcasecmp(type, alias) == 0) { + *fstype = bsd_alias_match[i].type; + return (0); + } + } + return (EINVAL); +} + +static int +g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry, + struct g_part_parms *gpp) +{ + struct g_part_bsd_entry *entry; + struct g_part_bsd_table *table; + + if (gpp->gpp_parms & G_PART_PARM_LABEL) + return (EINVAL); + + entry = (struct g_part_bsd_entry *)baseentry; + table = (struct g_part_bsd_table *)basetable; + + entry->part.p_size = gpp->gpp_size; + entry->part.p_offset = gpp->gpp_start + table->offset; + entry->part.p_fsize = 0; + entry->part.p_frag = 0; + entry->part.p_cpg = 0; + return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); +} + +static int +g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) +{ + struct g_part_bsd_table *table; + const u_char *codeptr; + + if (gpp->gpp_codesize != BOOT1_SIZE && gpp->gpp_codesize != BBSIZE) + return (ENODEV); + + table = (struct g_part_bsd_table *)basetable; + codeptr = gpp->gpp_codeptr; + bcopy(codeptr, table->bbarea, BOOT1_SIZE); + if (gpp->gpp_codesize == BBSIZE) + bcopy(codeptr + BOOT2_OFF, table->bbarea + BOOT2_OFF, + BOOT2_SIZE); + return (0); +} + +static int +g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp) +{ + struct g_provider *pp; + struct g_part_entry *baseentry; + struct g_part_bsd_entry *entry; + struct g_part_bsd_table *table; + u_char *ptr; + uint32_t msize, ncyls, secpercyl; + + pp = gpp->gpp_provider; + + if (pp->sectorsize < sizeof(struct disklabel)) + return (ENOSPC); + if (BBSIZE % pp->sectorsize) + return (ENOTBLK); + + msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); + secpercyl = basetable->gpt_sectors * basetable->gpt_heads; + ncyls = msize / secpercyl; + + table = (struct g_part_bsd_table *)basetable; + table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO); + ptr = table->bbarea + pp->sectorsize; + + le32enc(ptr + 0, DISKMAGIC); /* d_magic */ + le32enc(ptr + 40, pp->sectorsize); /* d_secsize */ + le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */ + le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */ + le32enc(ptr + 52, ncyls); /* d_ncylinders */ + le32enc(ptr + 56, secpercyl); /* d_secpercyl */ + le32enc(ptr + 60, msize); /* d_secperunit */ + le16enc(ptr + 72, 3600); /* d_rpm */ + le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */ + le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */ + le32enc(ptr + 140, BBSIZE); /* d_bbsize */ + + basetable->gpt_first = 0; + basetable->gpt_last = msize - 1; + basetable->gpt_isleaf = 1; + + baseentry = g_part_new_entry(basetable, RAW_PART + 1, + basetable->gpt_first, basetable->gpt_last); + baseentry->gpe_internal = 1; + entry = (struct g_part_bsd_entry *)baseentry; + entry->part.p_size = basetable->gpt_last + 1; + entry->part.p_offset = table->offset; + + return (0); +} + +static int +g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) +{ + struct g_part_bsd_table *table; + + table = (struct g_part_bsd_table *)basetable; + g_free(table->bbarea); + table->bbarea = NULL; + + /* Wipe the second sector to clear the partitioning. */ + basetable->gpt_smhead |= 2; + return (0); +} + +static void +g_part_bsd_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, + struct sbuf *sb, const char *indent) +{ + struct g_part_bsd_entry *entry; + + entry = (struct g_part_bsd_entry *)baseentry; + if (indent == NULL) { + /* conftxt: libdisk compatibility */ + sbuf_printf(sb, " xs BSD xt %u", entry->part.p_fstype); + } else if (entry != NULL) { + /* confxml: partition entry information */ + sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent, + entry->part.p_fstype); + } else { + /* confxml: scheme information */ + } +} + +static int +g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) +{ + struct g_part_bsd_entry *entry; + + /* Allow dumping to a swap partition or an unused partition. */ + entry = (struct g_part_bsd_entry *)baseentry; + return ((entry->part.p_fstype == FS_UNUSED || + entry->part.p_fstype == FS_SWAP) ? 1 : 0); +} + +static int +g_part_bsd_modify(struct g_part_table *basetable, + struct g_part_entry *baseentry, struct g_part_parms *gpp) +{ + struct g_part_bsd_entry *entry; + + if (gpp->gpp_parms & G_PART_PARM_LABEL) + return (EINVAL); + + entry = (struct g_part_bsd_entry *)baseentry; + if (gpp->gpp_parms & G_PART_PARM_TYPE) + return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); + return (0); +} + +static void +bsd_set_rawsize(struct g_part_table *basetable, struct g_provider *pp) +{ + struct g_part_bsd_table *table; + struct g_part_bsd_entry *entry; + struct g_part_entry *baseentry; + uint32_t msize; + + table = (struct g_part_bsd_table *)basetable; + msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); + le32enc(table->bbarea + pp->sectorsize + 60, msize); /* d_secperunit */ + basetable->gpt_last = msize - 1; + LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { + if (baseentry->gpe_index != RAW_PART + 1) + continue; + baseentry->gpe_end = basetable->gpt_last; + entry = (struct g_part_bsd_entry *)baseentry; + entry->part.p_size = msize; + return; + } +} + +static int +g_part_bsd_resize(struct g_part_table *basetable, + struct g_part_entry *baseentry, struct g_part_parms *gpp) +{ + struct g_part_bsd_entry *entry; + struct g_provider *pp; + + if (baseentry == NULL) { + pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; + bsd_set_rawsize(basetable, pp); + return (0); + } + entry = (struct g_part_bsd_entry *)baseentry; + baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1; + entry->part.p_size = gpp->gpp_size; + + return (0); +} + +static const char * +g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry, + char *buf, size_t bufsz) +{ + + snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1); + return (buf); +} + +static int +g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp) +{ + struct g_provider *pp; + u_char *buf; + uint32_t magic1, magic2; + int error; + + pp = cp->provider; + + /* Sanity-check the provider. */ + if (pp->sectorsize < sizeof(struct disklabel) || + pp->mediasize < BBSIZE) + return (ENOSPC); + if (BBSIZE % pp->sectorsize) + return (ENOTBLK); + + /* Check that there's a disklabel. */ + buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); + if (buf == NULL) + return (error); + magic1 = le32dec(buf + 0); + magic2 = le32dec(buf + 132); + g_free(buf); + return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC) + ? G_PART_PROBE_PRI_HIGH : ENXIO); +} + +static int +g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp) +{ + struct g_provider *pp; + struct g_part_bsd_table *table; + struct g_part_entry *baseentry; + struct g_part_bsd_entry *entry; + struct partition part; + u_char *buf, *p; + off_t chs, msize; + u_int sectors, heads; + int error, index; + + pp = cp->provider; + table = (struct g_part_bsd_table *)basetable; + msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); + + table->bbarea = g_read_data(cp, 0, BBSIZE, &error); + if (table->bbarea == NULL) + return (error); + + buf = table->bbarea + pp->sectorsize; + + if (le32dec(buf + 40) != pp->sectorsize) + goto invalid_label; + sectors = le32dec(buf + 44); + if (sectors < 1 || sectors > 255) + goto invalid_label; + if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) { + g_part_geometry_heads(msize, sectors, &chs, &heads); + if (chs != 0) { + basetable->gpt_sectors = sectors; + basetable->gpt_heads = heads; + } + } + heads = le32dec(buf + 48); + if (heads < 1 || heads > 255) + goto invalid_label; + if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom) + basetable->gpt_heads = heads; + + chs = le32dec(buf + 60); + if (chs < 1) + goto invalid_label; + /* Fix-up a sysinstall bug. */ + if (chs > msize) { + chs = msize; + le32enc(buf + 60, msize); + } + + basetable->gpt_first = 0; + basetable->gpt_last = msize - 1; + basetable->gpt_isleaf = 1; + + basetable->gpt_entries = le16dec(buf + 138); + if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent || + basetable->gpt_entries > g_part_bsd_scheme.gps_maxent) + goto invalid_label; + + table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4); + for (index = basetable->gpt_entries - 1; index >= 0; index--) { + p = buf + 148 + index * 16; + part.p_size = le32dec(p + 0); + part.p_offset = le32dec(p + 4); + part.p_fsize = le32dec(p + 8); + part.p_fstype = p[12]; + part.p_frag = p[13]; + part.p_cpg = le16dec(p + 14); + if (part.p_size == 0) + continue; + if (part.p_offset < table->offset) + continue; + if (part.p_offset - table->offset > basetable->gpt_last) + goto invalid_label; + baseentry = g_part_new_entry(basetable, index + 1, + part.p_offset - table->offset, + part.p_offset - table->offset + part.p_size - 1); + entry = (struct g_part_bsd_entry *)baseentry; + entry->part = part; + if (index == RAW_PART) + baseentry->gpe_internal = 1; + } + + return (0); + + invalid_label: + printf("GEOM: %s: invalid disklabel.\n", pp->name); + g_free(table->bbarea); + table->bbarea = NULL; + return (EINVAL); +} + +static const char * +g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry, + char *buf, size_t bufsz) +{ + struct g_part_bsd_entry *entry; + int type; + + entry = (struct g_part_bsd_entry *)baseentry; + type = entry->part.p_fstype; + if (type == FS_NANDFS) + return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS)); + if (type == FS_SWAP) + return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)); + if (type == FS_BSDFFS) + return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)); + if (type == FS_VINUM) + return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)); + if (type == FS_ZFS) + return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS)); + snprintf(buf, bufsz, "!%d", type); + return (buf); +} + +static int +g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp) +{ + struct g_provider *pp; + struct g_part_entry *baseentry; + struct g_part_bsd_entry *entry; + struct g_part_bsd_table *table; + uint16_t sum; + u_char *label, *p, *pe; + int error, index; + + pp = cp->provider; + table = (struct g_part_bsd_table *)basetable; + baseentry = LIST_FIRST(&basetable->gpt_entry); + label = table->bbarea + pp->sectorsize; + for (index = 1; index <= basetable->gpt_entries; index++) { + p = label + 148 + (index - 1) * 16; + entry = (baseentry != NULL && index == baseentry->gpe_index) + ? (struct g_part_bsd_entry *)baseentry : NULL; + if (entry != NULL && !baseentry->gpe_deleted) { + le32enc(p + 0, entry->part.p_size); + le32enc(p + 4, entry->part.p_offset); + le32enc(p + 8, entry->part.p_fsize); + p[12] = entry->part.p_fstype; + p[13] = entry->part.p_frag; + le16enc(p + 14, entry->part.p_cpg); + } else + bzero(p, 16); + + if (entry != NULL) + baseentry = LIST_NEXT(baseentry, gpe_entry); + } + + /* Calculate checksum. */ + le16enc(label + 136, 0); + pe = label + 148 + basetable->gpt_entries * 16; + sum = 0; + for (p = label; p < pe; p += 2) + sum ^= le16dec(p); + le16enc(label + 136, sum); + + error = g_write_data(cp, 0, table->bbarea, BBSIZE); + return (error); +} |