Current Path : /sys/geom/part/ |
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/geom/part/g_part_bsd.c |
/*- * 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/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/geom/part/g_part_bsd.c 223332 2011-06-20 12:22:30Z ae $"); #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_maxent = 20, /* Only 22 entries fit in 512 byte sectors */ .gps_bootcodesz = BBSIZE, }; G_PART_SCHEME_DECLARE(g_part_bsd); static int bsd_parse_type(const char *type, uint8_t *fstype) { const char *alias; char *endp; long lt; 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); } alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP); if (!strcasecmp(type, alias)) { *fstype = FS_SWAP; return (0); } alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS); if (!strcasecmp(type, alias)) { *fstype = FS_BSDFFS; return (0); } alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM); if (!strcasecmp(type, alias)) { *fstype = FS_VINUM; return (0); } alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS); if (!strcasecmp(type, alias)) { *fstype = FS_ZFS; 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; if (table->bbarea != NULL) 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 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; 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; if (sectors != basetable->gpt_sectors || heads != basetable->gpt_heads) printf("GEOM: %s: geometry does not match label" " (%uh,%us != %uh,%us).\n", pp->name, heads, sectors, basetable->gpt_heads, basetable->gpt_sectors); chs = le32dec(buf + 60); if (chs < 1) goto invalid_label; /* Fix-up a sysinstall bug. */ if (chs > msize) { chs = msize; le32enc(buf + 60, msize); } if (chs != msize) printf("GEOM: %s: media size does not match label.\n", pp->name); 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_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); }