diff --git a/stand/common/disk.c b/stand/common/disk.c index d6ef08100f12..ec714b24d85a 100644 --- a/stand/common/disk.c +++ b/stand/common/disk.c @@ -1,442 +1,440 @@ /*- * Copyright (c) 1998 Michael Smith * Copyright (c) 2012 Andrey V. Elsukov * 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 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 AUTHOR 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include "disk.h" #ifdef DISK_DEBUG # define DEBUG(fmt, args...) printf("%s: " fmt "\n" , __func__ , ## args) #else # define DEBUG(fmt, args...) #endif struct open_disk { struct ptable *table; uint64_t mediasize; uint64_t entrysize; u_int sectorsize; }; struct print_args { struct disk_devdesc *dev; const char *prefix; int verbose; }; /* Convert size to a human-readable number. */ static char * display_size(uint64_t size, u_int sectorsize) { static char buf[80]; char unit; size = size * sectorsize / 1024; unit = 'K'; if (size >= 10485760000LL) { size /= 1073741824; unit = 'T'; } else if (size >= 10240000) { size /= 1048576; unit = 'G'; } else if (size >= 10000) { size /= 1024; unit = 'M'; } sprintf(buf, "%ld%cB", (long)size, unit); return (buf); } int ptblread(void *d, void *buf, size_t blocks, uint64_t offset) { struct disk_devdesc *dev; struct open_disk *od; dev = (struct disk_devdesc *)d; od = (struct open_disk *)dev->dd.d_opendata; /* * The strategy function assumes the offset is in units of 512 byte * sectors. For larger sector sizes, we need to adjust the offset to * match the actual sector size. */ offset *= (od->sectorsize / 512); /* * As the GPT backup partition is located at the end of the disk, * to avoid reading past disk end, flag bcache not to use RA. */ return (dev->dd.d_dev->dv_strategy(dev, F_READ | F_NORA, offset, blocks * od->sectorsize, (char *)buf, NULL)); } #define PWIDTH 35 static int ptable_print(void *arg, const char *pname, const struct ptable_entry *part) { struct disk_devdesc dev; struct print_args *pa, bsd; struct open_disk *od; struct ptable *table; char line[80]; int res; pa = (struct print_args *)arg; od = (struct open_disk *)pa->dev->dd.d_opendata; sprintf(line, " %s%s: %s", pa->prefix, pname, parttype2str(part->type)); if (pa->verbose) sprintf(line, "%-*s%s", PWIDTH, line, display_size(part->end - part->start + 1, od->sectorsize)); strcat(line, "\n"); if (pager_output(line)) return 1; res = 0; if (part->type == PART_FREEBSD) { /* Open slice with BSD label */ dev.dd.d_dev = pa->dev->dd.d_dev; dev.dd.d_unit = pa->dev->dd.d_unit; dev.d_slice = part->index; dev.d_partition = -1; if (disk_open(&dev, part->end - part->start + 1, od->sectorsize) == 0) { table = ptable_open(&dev, part->end - part->start + 1, od->sectorsize, ptblread); if (table != NULL) { sprintf(line, " %s%s", pa->prefix, pname); bsd.dev = pa->dev; bsd.prefix = line; bsd.verbose = pa->verbose; res = ptable_iterate(table, &bsd, ptable_print); ptable_close(table); } disk_close(&dev); } } return (res); } #undef PWIDTH int disk_print(struct disk_devdesc *dev, char *prefix, int verbose) { struct open_disk *od; struct print_args pa; /* Disk should be opened */ od = (struct open_disk *)dev->dd.d_opendata; pa.dev = dev; pa.prefix = prefix; pa.verbose = verbose; return (ptable_iterate(od->table, &pa, ptable_print)); } int disk_read(struct disk_devdesc *dev, void *buf, uint64_t offset, u_int blocks) { struct open_disk *od; int ret; od = (struct open_disk *)dev->dd.d_opendata; ret = dev->dd.d_dev->dv_strategy(dev, F_READ, dev->d_offset + offset, blocks * od->sectorsize, buf, NULL); return (ret); } int disk_write(struct disk_devdesc *dev, void *buf, uint64_t offset, u_int blocks) { struct open_disk *od; int ret; od = (struct open_disk *)dev->dd.d_opendata; ret = dev->dd.d_dev->dv_strategy(dev, F_WRITE, dev->d_offset + offset, blocks * od->sectorsize, buf, NULL); return (ret); } int disk_ioctl(struct disk_devdesc *dev, u_long cmd, void *data) { struct open_disk *od = dev->dd.d_opendata; if (od == NULL) return (ENOTTY); switch (cmd) { case DIOCGSECTORSIZE: *(u_int *)data = od->sectorsize; break; case DIOCGMEDIASIZE: if (dev->d_offset == 0) *(uint64_t *)data = od->mediasize; else *(uint64_t *)data = od->entrysize * od->sectorsize; break; default: return (ENOTTY); } return (0); } int disk_open(struct disk_devdesc *dev, uint64_t mediasize, u_int sectorsize) { struct disk_devdesc partdev; struct open_disk *od; struct ptable *table; struct ptable_entry part; int rc, slice, partition; rc = 0; od = (struct open_disk *)malloc(sizeof(struct open_disk)); if (od == NULL) { DEBUG("no memory"); return (ENOMEM); } dev->dd.d_opendata = od; od->entrysize = 0; od->mediasize = mediasize; od->sectorsize = sectorsize; /* * While we are reading disk metadata, make sure we do it relative * to the start of the disk */ memcpy(&partdev, dev, sizeof(partdev)); partdev.d_offset = 0; partdev.d_slice = -1; partdev.d_partition = -1; dev->d_offset = 0; table = NULL; slice = dev->d_slice; partition = dev->d_partition; DEBUG("%s unit %d, slice %d, partition %d => %p", disk_fmtdev(dev), dev->dd.d_unit, dev->d_slice, dev->d_partition, od); /* Determine disk layout. */ od->table = ptable_open(&partdev, mediasize / sectorsize, sectorsize, ptblread); if (od->table == NULL) { DEBUG("Can't read partition table"); rc = ENXIO; goto out; } if (ptable_getsize(od->table, &mediasize) != 0) { rc = ENXIO; goto out; } - if (mediasize > od->mediasize) { - od->mediasize = mediasize; - } + od->mediasize = mediasize; if (ptable_gettype(od->table) == PTABLE_BSD && partition >= 0) { /* It doesn't matter what value has d_slice */ rc = ptable_getpart(od->table, &part, partition); if (rc == 0) { dev->d_offset = part.start; od->entrysize = part.end - part.start + 1; } } else if (ptable_gettype(od->table) == PTABLE_ISO9660) { dev->d_offset = 0; od->entrysize = mediasize; } else if (slice >= 0) { /* Try to get information about partition */ if (slice == 0) rc = ptable_getbestpart(od->table, &part); else rc = ptable_getpart(od->table, &part, slice); if (rc != 0) /* Partition doesn't exist */ goto out; dev->d_offset = part.start; od->entrysize = part.end - part.start + 1; slice = part.index; if (ptable_gettype(od->table) == PTABLE_GPT) { partition = 255; goto out; /* Nothing more to do */ } else if (partition == 255) { /* * When we try to open GPT partition, but partition * table isn't GPT, reset d_partition value to -1 * and try to autodetect appropriate value. */ partition = -1; } /* * If d_partition < 0 and we are looking at a BSD slice, * then try to read BSD label, otherwise return the * whole MBR slice. */ if (partition == -1 && part.type != PART_FREEBSD) goto out; /* Try to read BSD label */ table = ptable_open(dev, part.end - part.start + 1, od->sectorsize, ptblread); if (table == NULL) { DEBUG("Can't read BSD label"); rc = ENXIO; goto out; } /* * If slice contains BSD label and d_partition < 0, then * assume the 'a' partition. Otherwise just return the * whole MBR slice, because it can contain ZFS. */ if (partition < 0) { if (ptable_gettype(table) != PTABLE_BSD) goto out; partition = 0; } rc = ptable_getpart(table, &part, partition); if (rc != 0) goto out; dev->d_offset += part.start; od->entrysize = part.end - part.start + 1; } out: if (table != NULL) ptable_close(table); if (rc != 0) { if (od->table != NULL) ptable_close(od->table); free(od); DEBUG("%s could not open", disk_fmtdev(dev)); } else { /* Save the slice and partition number to the dev */ dev->d_slice = slice; dev->d_partition = partition; DEBUG("%s offset %lld => %p", disk_fmtdev(dev), (long long)dev->d_offset, od); } return (rc); } int disk_close(struct disk_devdesc *dev) { struct open_disk *od; od = (struct open_disk *)dev->dd.d_opendata; DEBUG("%s closed => %p", disk_fmtdev(dev), od); ptable_close(od->table); free(od); return (0); } char* disk_fmtdev(struct disk_devdesc *dev) { static char buf[128]; char *cp; cp = buf + sprintf(buf, "%s%d", dev->dd.d_dev->dv_name, dev->dd.d_unit); if (dev->d_slice >= 0) { #ifdef LOADER_GPT_SUPPORT if (dev->d_partition == 255) { sprintf(cp, "p%d:", dev->d_slice); return (buf); } else #endif #ifdef LOADER_MBR_SUPPORT cp += sprintf(cp, "s%d", dev->d_slice); #endif } if (dev->d_partition >= 0) cp += sprintf(cp, "%c", dev->d_partition + 'a'); strcat(cp, ":"); return (buf); } int disk_parsedev(struct disk_devdesc *dev, const char *devspec, const char **path) { int unit, slice, partition; const char *np; char *cp; np = devspec; unit = slice = partition = -1; if (*np != '\0' && *np != ':') { unit = strtol(np, &cp, 10); if (cp == np) return (EUNIT); #ifdef LOADER_GPT_SUPPORT if (*cp == 'p') { np = cp + 1; slice = strtol(np, &cp, 10); if (np == cp) return (ESLICE); /* we don't support nested partitions on GPT */ if (*cp != '\0' && *cp != ':') return (EINVAL); partition = 255; } else #endif #ifdef LOADER_MBR_SUPPORT if (*cp == 's') { np = cp + 1; slice = strtol(np, &cp, 10); if (np == cp) return (ESLICE); } #endif if (*cp != '\0' && *cp != ':') { partition = *cp - 'a'; if (partition < 0) return (EPART); cp++; } } else return (EINVAL); if (*cp != '\0' && *cp != ':') return (EINVAL); dev->dd.d_unit = unit; dev->d_slice = slice; dev->d_partition = partition; if (path != NULL) *path = (*cp == '\0') ? cp: cp + 1; return (0); } diff --git a/stand/common/part.c b/stand/common/part.c index 9a59453e7e82..56366b62104d 100644 --- a/stand/common/part.c +++ b/stand/common/part.c @@ -1,945 +1,944 @@ /*- * Copyright (c) 2012 Andrey V. Elsukov * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef PART_DEBUG #define DEBUG(fmt, args...) printf("%s: " fmt "\n", __func__, ## args) #else #define DEBUG(fmt, args...) #endif #ifdef LOADER_GPT_SUPPORT #define MAXTBLSZ 64 static const uuid_t gpt_uuid_unused = GPT_ENT_TYPE_UNUSED; static const uuid_t gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA; static const uuid_t gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; static const uuid_t gpt_uuid_efi = GPT_ENT_TYPE_EFI; static const uuid_t gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD; static const uuid_t gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; static const uuid_t gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS; static const uuid_t gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; static const uuid_t gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; static const uuid_t gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; #endif struct pentry { struct ptable_entry part; uint64_t flags; union { uint8_t bsd; uint8_t mbr; uuid_t gpt; uint16_t vtoc8; } type; STAILQ_ENTRY(pentry) entry; }; struct ptable { enum ptable_type type; uint16_t sectorsize; uint64_t sectors; STAILQ_HEAD(, pentry) entries; }; static struct parttypes { enum partition_type type; const char *desc; } ptypes[] = { { PART_UNKNOWN, "Unknown" }, { PART_EFI, "EFI" }, { PART_FREEBSD, "FreeBSD" }, { PART_FREEBSD_BOOT, "FreeBSD boot" }, { PART_FREEBSD_NANDFS, "FreeBSD nandfs" }, { PART_FREEBSD_UFS, "FreeBSD UFS" }, { PART_FREEBSD_ZFS, "FreeBSD ZFS" }, { PART_FREEBSD_SWAP, "FreeBSD swap" }, { PART_FREEBSD_VINUM, "FreeBSD vinum" }, { PART_LINUX, "Linux" }, { PART_LINUX_SWAP, "Linux swap" }, { PART_DOS, "DOS/Windows" }, { PART_ISO9660, "ISO9660" }, }; const char * parttype2str(enum partition_type type) { size_t i; for (i = 0; i < nitems(ptypes); i++) if (ptypes[i].type == type) return (ptypes[i].desc); return (ptypes[0].desc); } #ifdef LOADER_GPT_SUPPORT static void uuid_letoh(uuid_t *uuid) { uuid->time_low = le32toh(uuid->time_low); uuid->time_mid = le16toh(uuid->time_mid); uuid->time_hi_and_version = le16toh(uuid->time_hi_and_version); } static enum partition_type gpt_parttype(uuid_t type) { if (uuid_equal(&type, &gpt_uuid_efi, NULL)) return (PART_EFI); else if (uuid_equal(&type, &gpt_uuid_ms_basic_data, NULL)) return (PART_DOS); else if (uuid_equal(&type, &gpt_uuid_freebsd_boot, NULL)) return (PART_FREEBSD_BOOT); else if (uuid_equal(&type, &gpt_uuid_freebsd_ufs, NULL)) return (PART_FREEBSD_UFS); else if (uuid_equal(&type, &gpt_uuid_freebsd_zfs, NULL)) return (PART_FREEBSD_ZFS); else if (uuid_equal(&type, &gpt_uuid_freebsd_swap, NULL)) return (PART_FREEBSD_SWAP); else if (uuid_equal(&type, &gpt_uuid_freebsd_vinum, NULL)) return (PART_FREEBSD_VINUM); else if (uuid_equal(&type, &gpt_uuid_freebsd_nandfs, NULL)) return (PART_FREEBSD_NANDFS); else if (uuid_equal(&type, &gpt_uuid_freebsd, NULL)) return (PART_FREEBSD); return (PART_UNKNOWN); } static struct gpt_hdr * gpt_checkhdr(struct gpt_hdr *hdr, uint64_t lba_self, uint64_t lba_last, uint16_t sectorsize) { uint32_t sz, crc; if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)) != 0) { DEBUG("no GPT signature"); return (NULL); } sz = le32toh(hdr->hdr_size); if (sz < 92 || sz > sectorsize) { DEBUG("invalid GPT header size: %d", sz); return (NULL); } crc = le32toh(hdr->hdr_crc_self); hdr->hdr_crc_self = 0; if (crc32(hdr, sz) != crc) { DEBUG("GPT header's CRC doesn't match"); return (NULL); } hdr->hdr_crc_self = crc; hdr->hdr_revision = le32toh(hdr->hdr_revision); if (hdr->hdr_revision < GPT_HDR_REVISION) { DEBUG("unsupported GPT revision %d", hdr->hdr_revision); return (NULL); } hdr->hdr_lba_self = le64toh(hdr->hdr_lba_self); if (hdr->hdr_lba_self != lba_self) { DEBUG("self LBA doesn't match"); return (NULL); } hdr->hdr_lba_alt = le64toh(hdr->hdr_lba_alt); if (hdr->hdr_lba_alt == hdr->hdr_lba_self) { DEBUG("invalid alternate LBA"); return (NULL); } hdr->hdr_entries = le32toh(hdr->hdr_entries); hdr->hdr_entsz = le32toh(hdr->hdr_entsz); if (hdr->hdr_entries == 0 || hdr->hdr_entsz < sizeof(struct gpt_ent) || sectorsize % hdr->hdr_entsz != 0) { DEBUG("invalid entry size or number of entries"); return (NULL); } hdr->hdr_lba_start = le64toh(hdr->hdr_lba_start); hdr->hdr_lba_end = le64toh(hdr->hdr_lba_end); hdr->hdr_lba_table = le64toh(hdr->hdr_lba_table); hdr->hdr_crc_table = le32toh(hdr->hdr_crc_table); uuid_letoh(&hdr->hdr_uuid); return (hdr); } static int gpt_checktbl(const struct gpt_hdr *hdr, uint8_t *tbl, size_t size, uint64_t lba_last) { struct gpt_ent *ent; uint32_t i, cnt; cnt = size / hdr->hdr_entsz; if (hdr->hdr_entries <= cnt) { cnt = hdr->hdr_entries; /* Check CRC only when buffer size is enough for table. */ if (hdr->hdr_crc_table != crc32(tbl, hdr->hdr_entries * hdr->hdr_entsz)) { DEBUG("GPT table's CRC doesn't match"); return (-1); } } for (i = 0; i < cnt; i++) { ent = (struct gpt_ent *)(tbl + i * hdr->hdr_entsz); uuid_letoh(&ent->ent_type); if (uuid_equal(&ent->ent_type, &gpt_uuid_unused, NULL)) continue; ent->ent_lba_start = le64toh(ent->ent_lba_start); ent->ent_lba_end = le64toh(ent->ent_lba_end); } return (0); } static struct ptable * ptable_gptread(struct ptable *table, void *dev, diskread_t dread) { struct pentry *entry; struct gpt_hdr *phdr, hdr; struct gpt_ent *ent; uint8_t *buf, *tbl; uint64_t offset; int pri, sec; size_t size, i; buf = malloc(table->sectorsize); if (buf == NULL) return (NULL); tbl = malloc(table->sectorsize * MAXTBLSZ); if (tbl == NULL) { free(buf); return (NULL); } /* Read the primary GPT header. */ if (dread(dev, buf, 1, 1) != 0) { ptable_close(table); table = NULL; goto out; } pri = sec = 0; /* Check the primary GPT header. */ phdr = gpt_checkhdr((struct gpt_hdr *)buf, 1, table->sectors - 1, table->sectorsize); if (phdr != NULL) { /* Read the primary GPT table. */ size = MIN(MAXTBLSZ, howmany(phdr->hdr_entries * phdr->hdr_entsz, table->sectorsize)); if (dread(dev, tbl, size, phdr->hdr_lba_table) == 0 && gpt_checktbl(phdr, tbl, size * table->sectorsize, table->sectors - 1) == 0) { memcpy(&hdr, phdr, sizeof(hdr)); pri = 1; } } offset = pri ? hdr.hdr_lba_alt: table->sectors - 1; /* Read the backup GPT header. */ if (dread(dev, buf, 1, offset) != 0) phdr = NULL; else phdr = gpt_checkhdr((struct gpt_hdr *)buf, offset, table->sectors - 1, table->sectorsize); if (phdr != NULL) { /* * Compare primary and backup headers. * If they are equal, then we do not need to read backup * table. If they are different, then prefer backup header * and try to read backup table. */ if (pri == 0 || uuid_equal(&hdr.hdr_uuid, &phdr->hdr_uuid, NULL) == 0 || hdr.hdr_revision != phdr->hdr_revision || hdr.hdr_size != phdr->hdr_size || hdr.hdr_lba_start != phdr->hdr_lba_start || hdr.hdr_lba_end != phdr->hdr_lba_end || hdr.hdr_entries != phdr->hdr_entries || hdr.hdr_entsz != phdr->hdr_entsz || hdr.hdr_crc_table != phdr->hdr_crc_table) { /* Read the backup GPT table. */ size = MIN(MAXTBLSZ, howmany(phdr->hdr_entries * phdr->hdr_entsz, table->sectorsize)); if (dread(dev, tbl, size, phdr->hdr_lba_table) == 0 && gpt_checktbl(phdr, tbl, size * table->sectorsize, table->sectors - 1) == 0) { memcpy(&hdr, phdr, sizeof(hdr)); sec = 1; } } } if (pri == 0 && sec == 0) { /* Both primary and backup tables are invalid. */ table->type = PTABLE_NONE; goto out; } DEBUG("GPT detected"); size = MIN(hdr.hdr_entries * hdr.hdr_entsz, MAXTBLSZ * table->sectorsize); /* * If the disk's sector count is smaller than the sector count recorded * in the disk's GPT table header, set the table->sectors to the value * recorded in GPT tables. This is done to work around buggy firmware * that returns truncated disk sizes. * * Note, this is still not a foolproof way to get disk's size. For * example, an image file can be truncated when copied to smaller media. */ - if (hdr.hdr_lba_alt + 1 > table->sectors) - table->sectors = hdr.hdr_lba_alt + 1; + table->sectors = hdr.hdr_lba_alt + 1; for (i = 0; i < size / hdr.hdr_entsz; i++) { ent = (struct gpt_ent *)(tbl + i * hdr.hdr_entsz); if (uuid_equal(&ent->ent_type, &gpt_uuid_unused, NULL)) continue; /* Simple sanity checks. */ if (ent->ent_lba_start < hdr.hdr_lba_start || ent->ent_lba_end > hdr.hdr_lba_end || ent->ent_lba_start > ent->ent_lba_end) continue; entry = malloc(sizeof(*entry)); if (entry == NULL) break; entry->part.start = ent->ent_lba_start; entry->part.end = ent->ent_lba_end; entry->part.index = i + 1; entry->part.type = gpt_parttype(ent->ent_type); entry->flags = le64toh(ent->ent_attr); memcpy(&entry->type.gpt, &ent->ent_type, sizeof(uuid_t)); STAILQ_INSERT_TAIL(&table->entries, entry, entry); DEBUG("new GPT partition added"); } out: free(buf); free(tbl); return (table); } #endif /* LOADER_GPT_SUPPORT */ #ifdef LOADER_MBR_SUPPORT /* We do not need to support too many EBR partitions in the loader */ #define MAXEBRENTRIES 8 static enum partition_type mbr_parttype(uint8_t type) { switch (type) { case DOSPTYP_386BSD: return (PART_FREEBSD); case DOSPTYP_LINSWP: return (PART_LINUX_SWAP); case DOSPTYP_LINUX: return (PART_LINUX); case 0x01: case 0x04: case 0x06: case 0x07: case 0x0b: case 0x0c: case 0x0e: return (PART_DOS); } return (PART_UNKNOWN); } static struct ptable * ptable_ebrread(struct ptable *table, void *dev, diskread_t dread) { struct dos_partition *dp; struct pentry *e1, *entry; uint32_t start, end, offset; u_char *buf; int i, index; STAILQ_FOREACH(e1, &table->entries, entry) { if (e1->type.mbr == DOSPTYP_EXT || e1->type.mbr == DOSPTYP_EXTLBA) break; } if (e1 == NULL) return (table); index = 5; offset = e1->part.start; buf = malloc(table->sectorsize); if (buf == NULL) return (table); DEBUG("EBR detected"); for (i = 0; i < MAXEBRENTRIES; i++) { #if 0 /* Some BIOSes return an incorrect number of sectors */ if (offset >= table->sectors) break; #endif if (dread(dev, buf, 1, offset) != 0) break; dp = (struct dos_partition *)(buf + DOSPARTOFF); if (dp[0].dp_typ == 0) break; start = le32toh(dp[0].dp_start); if (dp[0].dp_typ == DOSPTYP_EXT && dp[1].dp_typ == 0) { offset = e1->part.start + start; continue; } end = le32toh(dp[0].dp_size); entry = malloc(sizeof(*entry)); if (entry == NULL) break; entry->part.start = offset + start; entry->part.end = entry->part.start + end - 1; entry->part.index = index++; entry->part.type = mbr_parttype(dp[0].dp_typ); entry->flags = dp[0].dp_flag; entry->type.mbr = dp[0].dp_typ; STAILQ_INSERT_TAIL(&table->entries, entry, entry); DEBUG("new EBR partition added"); if (dp[1].dp_typ == 0) break; offset = e1->part.start + le32toh(dp[1].dp_start); } free(buf); return (table); } #endif /* LOADER_MBR_SUPPORT */ static enum partition_type bsd_parttype(uint8_t type) { switch (type) { case FS_NANDFS: return (PART_FREEBSD_NANDFS); case FS_SWAP: return (PART_FREEBSD_SWAP); case FS_BSDFFS: return (PART_FREEBSD_UFS); case FS_VINUM: return (PART_FREEBSD_VINUM); case FS_ZFS: return (PART_FREEBSD_ZFS); } return (PART_UNKNOWN); } static struct ptable * ptable_bsdread(struct ptable *table, void *dev, diskread_t dread) { struct disklabel *dl; struct partition *part; struct pentry *entry; uint8_t *buf; uint32_t raw_offset; int i; if (table->sectorsize < sizeof(struct disklabel)) { DEBUG("Too small sectorsize"); return (table); } buf = malloc(table->sectorsize); if (buf == NULL) return (table); if (dread(dev, buf, 1, 1) != 0) { DEBUG("read failed"); ptable_close(table); table = NULL; goto out; } dl = (struct disklabel *)buf; if (le32toh(dl->d_magic) != DISKMAGIC && le32toh(dl->d_magic2) != DISKMAGIC) goto out; if (le32toh(dl->d_secsize) != table->sectorsize) { DEBUG("unsupported sector size"); goto out; } dl->d_npartitions = le16toh(dl->d_npartitions); if (dl->d_npartitions > 20 || dl->d_npartitions < 8) { DEBUG("invalid number of partitions"); goto out; } DEBUG("BSD detected"); part = &dl->d_partitions[0]; raw_offset = le32toh(part[RAW_PART].p_offset); for (i = 0; i < dl->d_npartitions; i++, part++) { if (i == RAW_PART) continue; if (part->p_size == 0) continue; entry = malloc(sizeof(*entry)); if (entry == NULL) break; entry->part.start = le32toh(part->p_offset) - raw_offset; entry->part.end = entry->part.start + le32toh(part->p_size) - 1; entry->part.type = bsd_parttype(part->p_fstype); entry->part.index = i; /* starts from zero */ entry->type.bsd = part->p_fstype; STAILQ_INSERT_TAIL(&table->entries, entry, entry); DEBUG("new BSD partition added"); } table->type = PTABLE_BSD; out: free(buf); return (table); } #ifdef LOADER_VTOC8_SUPPORT static enum partition_type vtoc8_parttype(uint16_t type) { switch (type) { case VTOC_TAG_FREEBSD_NANDFS: return (PART_FREEBSD_NANDFS); case VTOC_TAG_FREEBSD_SWAP: return (PART_FREEBSD_SWAP); case VTOC_TAG_FREEBSD_UFS: return (PART_FREEBSD_UFS); case VTOC_TAG_FREEBSD_VINUM: return (PART_FREEBSD_VINUM); case VTOC_TAG_FREEBSD_ZFS: return (PART_FREEBSD_ZFS); } return (PART_UNKNOWN); } static struct ptable * ptable_vtoc8read(struct ptable *table, void *dev, diskread_t dread) { struct pentry *entry; struct vtoc8 *dl; uint8_t *buf; uint16_t sum, heads, sectors; int i; if (table->sectorsize != sizeof(struct vtoc8)) return (table); buf = malloc(table->sectorsize); if (buf == NULL) return (table); if (dread(dev, buf, 1, 0) != 0) { DEBUG("read failed"); ptable_close(table); table = NULL; goto out; } dl = (struct vtoc8 *)buf; /* Check the sum */ for (i = sum = 0; i < sizeof(struct vtoc8); i += sizeof(sum)) sum ^= be16dec(buf + i); if (sum != 0) { DEBUG("incorrect checksum"); goto out; } if (be16toh(dl->nparts) != VTOC8_NPARTS) { DEBUG("invalid number of entries"); goto out; } sectors = be16toh(dl->nsecs); heads = be16toh(dl->nheads); if (sectors * heads == 0) { DEBUG("invalid geometry"); goto out; } DEBUG("VTOC8 detected"); for (i = 0; i < VTOC8_NPARTS; i++) { dl->part[i].tag = be16toh(dl->part[i].tag); if (i == VTOC_RAW_PART || dl->part[i].tag == VTOC_TAG_UNASSIGNED) continue; entry = malloc(sizeof(*entry)); if (entry == NULL) break; entry->part.start = be32toh(dl->map[i].cyl) * heads * sectors; entry->part.end = be32toh(dl->map[i].nblks) + entry->part.start - 1; entry->part.type = vtoc8_parttype(dl->part[i].tag); entry->part.index = i; /* starts from zero */ entry->type.vtoc8 = dl->part[i].tag; STAILQ_INSERT_TAIL(&table->entries, entry, entry); DEBUG("new VTOC8 partition added"); } table->type = PTABLE_VTOC8; out: free(buf); return (table); } #endif /* LOADER_VTOC8_SUPPORT */ #define cdb2devb(bno) ((bno) * ISO_DEFAULT_BLOCK_SIZE / table->sectorsize) static struct ptable * ptable_iso9660read(struct ptable *table, void *dev, diskread_t dread) { uint8_t *buf; struct iso_primary_descriptor *vd; struct pentry *entry; buf = malloc(table->sectorsize); if (buf == NULL) return (table); if (dread(dev, buf, 1, cdb2devb(16)) != 0) { DEBUG("read failed"); ptable_close(table); table = NULL; goto out; } vd = (struct iso_primary_descriptor *)buf; if (bcmp(vd->id, ISO_STANDARD_ID, sizeof vd->id) != 0) goto out; entry = malloc(sizeof(*entry)); if (entry == NULL) goto out; entry->part.start = 0; entry->part.end = table->sectors; entry->part.type = PART_ISO9660; entry->part.index = 0; STAILQ_INSERT_TAIL(&table->entries, entry, entry); table->type = PTABLE_ISO9660; out: free(buf); return (table); } struct ptable * ptable_open(void *dev, uint64_t sectors, uint16_t sectorsize, diskread_t *dread) { struct dos_partition *dp; struct ptable *table; uint8_t *buf; int i, count; #ifdef LOADER_MBR_SUPPORT struct pentry *entry; uint32_t start, end; int has_ext; #endif table = NULL; buf = malloc(sectorsize); if (buf == NULL) return (NULL); /* First, read the MBR. */ if (dread(dev, buf, 1, DOSBBSECTOR) != 0) { DEBUG("read failed"); goto out; } table = malloc(sizeof(*table)); if (table == NULL) goto out; table->sectors = sectors; table->sectorsize = sectorsize; table->type = PTABLE_NONE; STAILQ_INIT(&table->entries); if (ptable_iso9660read(table, dev, dread) != NULL) { if (table->type == PTABLE_ISO9660) goto out; } #ifdef LOADER_VTOC8_SUPPORT if (be16dec(buf + offsetof(struct vtoc8, magic)) == VTOC_MAGIC) { if (ptable_vtoc8read(table, dev, dread) == NULL) { /* Read error. */ table = NULL; goto out; } else if (table->type == PTABLE_VTOC8) goto out; } #endif /* Check the BSD label. */ if (ptable_bsdread(table, dev, dread) == NULL) { /* Read error. */ table = NULL; goto out; } else if (table->type == PTABLE_BSD) goto out; #if defined(LOADER_GPT_SUPPORT) || defined(LOADER_MBR_SUPPORT) /* Check the MBR magic. */ if (buf[DOSMAGICOFFSET] != 0x55 || buf[DOSMAGICOFFSET + 1] != 0xaa) { DEBUG("magic sequence not found"); #if defined(LOADER_GPT_SUPPORT) /* There is no PMBR, check that we have backup GPT */ table->type = PTABLE_GPT; table = ptable_gptread(table, dev, dread); #endif goto out; } /* Check that we have PMBR. Also do some validation. */ dp = (struct dos_partition *)(buf + DOSPARTOFF); for (i = 0, count = 0; i < NDOSPART; i++) { if (dp[i].dp_flag != 0 && dp[i].dp_flag != 0x80) { DEBUG("invalid partition flag %x", dp[i].dp_flag); goto out; } #ifdef LOADER_GPT_SUPPORT if (dp[i].dp_typ == DOSPTYP_PMBR) { table->type = PTABLE_GPT; DEBUG("PMBR detected"); } #endif if (dp[i].dp_typ != 0) count++; } /* Do we have some invalid values? */ if (table->type == PTABLE_GPT && count > 1) { if (dp[1].dp_typ != DOSPTYP_HFS) { table->type = PTABLE_NONE; DEBUG("Incorrect PMBR, ignore it"); } else { DEBUG("Bootcamp detected"); } } #ifdef LOADER_GPT_SUPPORT if (table->type == PTABLE_GPT) { table = ptable_gptread(table, dev, dread); goto out; } #endif #ifdef LOADER_MBR_SUPPORT /* Read MBR. */ DEBUG("MBR detected"); table->type = PTABLE_MBR; for (i = has_ext = 0; i < NDOSPART; i++) { if (dp[i].dp_typ == 0) continue; start = le32dec(&(dp[i].dp_start)); end = le32dec(&(dp[i].dp_size)); if (start == 0 || end == 0) continue; #if 0 /* Some BIOSes return an incorrect number of sectors */ if (start + end - 1 >= sectors) continue; /* XXX: ignore */ #endif if (dp[i].dp_typ == DOSPTYP_EXT || dp[i].dp_typ == DOSPTYP_EXTLBA) has_ext = 1; entry = malloc(sizeof(*entry)); if (entry == NULL) break; entry->part.start = start; entry->part.end = start + end - 1; entry->part.index = i + 1; entry->part.type = mbr_parttype(dp[i].dp_typ); entry->flags = dp[i].dp_flag; entry->type.mbr = dp[i].dp_typ; STAILQ_INSERT_TAIL(&table->entries, entry, entry); DEBUG("new MBR partition added"); } if (has_ext) { table = ptable_ebrread(table, dev, dread); /* FALLTHROUGH */ } #endif /* LOADER_MBR_SUPPORT */ #endif /* LOADER_MBR_SUPPORT || LOADER_GPT_SUPPORT */ out: free(buf); return (table); } void ptable_close(struct ptable *table) { struct pentry *entry; while (!STAILQ_EMPTY(&table->entries)) { entry = STAILQ_FIRST(&table->entries); STAILQ_REMOVE_HEAD(&table->entries, entry); free(entry); } free(table); } enum ptable_type ptable_gettype(const struct ptable *table) { return (table->type); } int ptable_getsize(const struct ptable *table, uint64_t *sizep) { uint64_t tmp = table->sectors * table->sectorsize; if (tmp < table->sectors) return (EOVERFLOW); if (sizep != NULL) *sizep = tmp; return (0); } int ptable_getpart(const struct ptable *table, struct ptable_entry *part, int index) { struct pentry *entry; if (part == NULL || table == NULL) return (EINVAL); STAILQ_FOREACH(entry, &table->entries, entry) { if (entry->part.index != index) continue; memcpy(part, &entry->part, sizeof(*part)); return (0); } return (ENOENT); } /* * Search for a slice with the following preferences: * * 1: Active FreeBSD slice * 2: Non-active FreeBSD slice * 3: Active Linux slice * 4: non-active Linux slice * 5: Active FAT/FAT32 slice * 6: non-active FAT/FAT32 slice */ #define PREF_RAWDISK 0 #define PREF_FBSD_ACT 1 #define PREF_FBSD 2 #define PREF_LINUX_ACT 3 #define PREF_LINUX 4 #define PREF_DOS_ACT 5 #define PREF_DOS 6 #define PREF_NONE 7 int ptable_getbestpart(const struct ptable *table, struct ptable_entry *part) { struct pentry *entry, *best; int pref, preflevel; if (part == NULL || table == NULL) return (EINVAL); best = NULL; preflevel = pref = PREF_NONE; STAILQ_FOREACH(entry, &table->entries, entry) { #ifdef LOADER_MBR_SUPPORT if (table->type == PTABLE_MBR) { switch (entry->type.mbr) { case DOSPTYP_386BSD: pref = entry->flags & 0x80 ? PREF_FBSD_ACT: PREF_FBSD; break; case DOSPTYP_LINUX: pref = entry->flags & 0x80 ? PREF_LINUX_ACT: PREF_LINUX; break; case 0x01: /* DOS/Windows */ case 0x04: case 0x06: case 0x0c: case 0x0e: case DOSPTYP_FAT32: pref = entry->flags & 0x80 ? PREF_DOS_ACT: PREF_DOS; break; default: pref = PREF_NONE; } } #endif /* LOADER_MBR_SUPPORT */ #ifdef LOADER_GPT_SUPPORT if (table->type == PTABLE_GPT) { if (entry->part.type == PART_DOS) pref = PREF_DOS; else if (entry->part.type == PART_FREEBSD_UFS || entry->part.type == PART_FREEBSD_ZFS) pref = PREF_FBSD; else pref = PREF_NONE; } #endif /* LOADER_GPT_SUPPORT */ if (pref < preflevel) { preflevel = pref; best = entry; } } if (best != NULL) { memcpy(part, &best->part, sizeof(*part)); return (0); } return (ENOENT); } int ptable_iterate(const struct ptable *table, void *arg, ptable_iterate_t *iter) { struct pentry *entry; char name[32]; int ret = 0; name[0] = '\0'; STAILQ_FOREACH(entry, &table->entries, entry) { #ifdef LOADER_MBR_SUPPORT if (table->type == PTABLE_MBR) sprintf(name, "s%d", entry->part.index); else #endif #ifdef LOADER_GPT_SUPPORT if (table->type == PTABLE_GPT) sprintf(name, "p%d", entry->part.index); else #endif #ifdef LOADER_VTOC8_SUPPORT if (table->type == PTABLE_VTOC8) sprintf(name, "%c", (uint8_t) 'a' + entry->part.index); else #endif if (table->type == PTABLE_BSD) sprintf(name, "%c", (uint8_t) 'a' + entry->part.index); if ((ret = iter(arg, name, &entry->part)) != 0) return (ret); } return (ret); } diff --git a/stand/i386/libi386/biosdisk.c b/stand/i386/libi386/biosdisk.c index 43cb63fde854..ef2e3fb56e39 100644 --- a/stand/i386/libi386/biosdisk.c +++ b/stand/i386/libi386/biosdisk.c @@ -1,936 +1,940 @@ /*- * Copyright (c) 1998 Michael Smith * Copyright (c) 2012 Andrey V. Elsukov * 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 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 AUTHOR 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 __FBSDID("$FreeBSD$"); /* * BIOS disk device handling. * * Ideas and algorithms from: * * - NetBSD libi386/biosdisk.c * - FreeBSD biosboot/disk.c * */ #include #include #include #include #include #include #include #include #include "disk.h" #include "libi386.h" #define BIOS_NUMDRIVES 0x475 #define BIOSDISK_SECSIZE 512 #define BUFSIZE (1 * BIOSDISK_SECSIZE) #define DT_ATAPI 0x10 /* disk type for ATAPI floppies */ #define WDMAJOR 0 /* major numbers for devices we frontend for */ #define WFDMAJOR 1 #define FDMAJOR 2 #define DAMAJOR 4 #ifdef DISK_DEBUG #define DEBUG(fmt, args...) printf("%s: " fmt "\n", __func__, ## args) #else #define DEBUG(fmt, args...) #endif /* * List of BIOS devices, translation from disk unit number to * BIOS unit number. */ static struct bdinfo { int bd_unit; /* BIOS unit number */ int bd_cyl; /* BIOS geometry */ int bd_hds; int bd_sec; int bd_flags; #define BD_MODEINT13 0x0000 #define BD_MODEEDD1 0x0001 #define BD_MODEEDD3 0x0002 #define BD_MODEEDD (BD_MODEEDD1 | BD_MODEEDD3) #define BD_MODEMASK 0x0003 #define BD_FLOPPY 0x0004 #define BD_NO_MEDIA 0x0008 int bd_type; /* BIOS 'drive type' (floppy only) */ uint16_t bd_sectorsize; /* Sector size */ uint64_t bd_sectors; /* Disk size */ int bd_open; /* reference counter */ void *bd_bcache; /* buffer cache data */ } bdinfo [MAXBDDEV]; static int nbdinfo = 0; #define BD(dev) (bdinfo[(dev)->dd.d_unit]) #define BD_RD 0 #define BD_WR 1 static void bd_io_workaround(struct disk_devdesc *dev); static int bd_io(struct disk_devdesc *, daddr_t, int, caddr_t, int); static int bd_int13probe(struct bdinfo *bd); static int bd_init(void); static int bd_strategy(void *devdata, int flag, daddr_t dblk, size_t size, char *buf, size_t *rsize); static int bd_realstrategy(void *devdata, int flag, daddr_t dblk, size_t size, char *buf, size_t *rsize); static int bd_open(struct open_file *f, ...); static int bd_close(struct open_file *f); static int bd_ioctl(struct open_file *f, u_long cmd, void *data); static int bd_print(int verbose); struct devsw biosdisk = { "disk", DEVT_DISK, bd_init, bd_strategy, bd_open, bd_close, bd_ioctl, bd_print, NULL }; /* * Translate between BIOS device numbers and our private unit numbers. */ int bd_bios2unit(int biosdev) { int i; DEBUG("looking for bios device 0x%x", biosdev); for (i = 0; i < nbdinfo; i++) { DEBUG("bd unit %d is BIOS device 0x%x", i, bdinfo[i].bd_unit); if (bdinfo[i].bd_unit == biosdev) return (i); } return (-1); } int bd_unit2bios(int unit) { if ((unit >= 0) && (unit < nbdinfo)) return (bdinfo[unit].bd_unit); return (-1); } /* * Quiz the BIOS for disk devices, save a little info about them. */ static int bd_init(void) { int base, unit, nfd = 0; /* sequence 0, 0x80 */ for (base = 0; base <= 0x80; base += 0x80) { for (unit = base; (nbdinfo < MAXBDDEV); unit++) { #ifndef VIRTUALBOX /* * Check the BIOS equipment list for number * of fixed disks. */ if (base == 0x80 && (nfd >= *(unsigned char *)PTOV(BIOS_NUMDRIVES))) break; #endif bdinfo[nbdinfo].bd_open = 0; bdinfo[nbdinfo].bd_bcache = NULL; bdinfo[nbdinfo].bd_unit = unit; bdinfo[nbdinfo].bd_flags = unit < 0x80 ? BD_FLOPPY: 0; if (!bd_int13probe(&bdinfo[nbdinfo])) break; /* XXX we need "disk aliases" to make this simpler */ printf("BIOS drive %c: is disk%d\n", (unit < 0x80) ? ('A' + unit): ('C' + unit - 0x80), nbdinfo); nbdinfo++; if (base == 0x80) nfd++; } } bcache_add_dev(nbdinfo); return (0); } /* * Return EDD version or 0 if EDD is not supported on this drive. */ static int bd_check_extensions(int unit) { /* Determine if we can use EDD with this device. */ v86.ctl = V86_FLAGS; v86.addr = 0x13; v86.eax = 0x4100; v86.edx = unit; v86.ebx = 0x55aa; v86int(); if (V86_CY(v86.efl) || /* carry set */ (v86.ebx & 0xffff) != 0xaa55) /* signature */ return (0); /* extended disk access functions (AH=42h-44h,47h,48h) supported */ if ((v86.ecx & EDD_INTERFACE_FIXED_DISK) == 0) return (0); return ((v86.eax >> 8) & 0xff); } static void bd_reset_disk(int unit) { /* reset disk */ v86.ctl = V86_FLAGS; v86.addr = 0x13; v86.eax = 0; v86.edx = unit; v86int(); } /* * Read CHS info. Return 0 on success, error otherwise. */ static int bd_get_diskinfo_std(struct bdinfo *bd) { bzero(&v86, sizeof(v86)); v86.ctl = V86_FLAGS; v86.addr = 0x13; v86.eax = 0x800; v86.edx = bd->bd_unit; v86int(); if (V86_CY(v86.efl) && ((v86.eax & 0xff00) != 0)) return ((v86.eax & 0xff00) >> 8); /* return custom error on absurd sector number */ if ((v86.ecx & 0x3f) == 0) return (0x60); bd->bd_cyl = ((v86.ecx & 0xc0) << 2) + ((v86.ecx & 0xff00) >> 8) + 1; /* Convert max head # -> # of heads */ bd->bd_hds = ((v86.edx & 0xff00) >> 8) + 1; bd->bd_sec = v86.ecx & 0x3f; bd->bd_type = v86.ebx; bd->bd_sectors = (uint64_t)bd->bd_cyl * bd->bd_hds * bd->bd_sec; return (0); } /* * Read EDD info. Return 0 on success, error otherwise. */ static int bd_get_diskinfo_ext(struct bdinfo *bd) { struct edd_params params; uint64_t total; /* Get disk params */ bzero(¶ms, sizeof(params)); params.len = sizeof(params); v86.ctl = V86_FLAGS; v86.addr = 0x13; v86.eax = 0x4800; v86.edx = bd->bd_unit; v86.ds = VTOPSEG(¶ms); v86.esi = VTOPOFF(¶ms); v86int(); if (V86_CY(v86.efl) && ((v86.eax & 0xff00) != 0)) return ((v86.eax & 0xff00) >> 8); /* * Sector size must be a multiple of 512 bytes. * An alternate test would be to check power of 2, * powerof2(params.sector_size). * 4K is largest read buffer we can use at this time. */ if (params.sector_size >= 512 && params.sector_size <= 4096 && (params.sector_size % BIOSDISK_SECSIZE) == 0) bd->bd_sectorsize = params.sector_size; bd->bd_cyl = params.cylinders; bd->bd_hds = params.heads; bd->bd_sec = params.sectors_per_track; if (params.sectors != 0) { total = params.sectors; } else { total = (uint64_t)params.cylinders * params.heads * params.sectors_per_track; } bd->bd_sectors = total; return (0); } /* * Try to detect a device supported by the legacy int13 BIOS */ static int bd_int13probe(struct bdinfo *bd) { int edd; int ret; bd->bd_flags &= ~BD_NO_MEDIA; edd = bd_check_extensions(bd->bd_unit); if (edd == 0) bd->bd_flags |= BD_MODEINT13; else if (edd < 0x30) bd->bd_flags |= BD_MODEEDD1; else bd->bd_flags |= BD_MODEEDD3; /* Default sector size */ bd->bd_sectorsize = BIOSDISK_SECSIZE; /* * Test if the floppy device is present, so we can avoid receiving * bogus information from bd_get_diskinfo_std(). */ if (bd->bd_unit < 0x80) { /* reset disk */ bd_reset_disk(bd->bd_unit); /* Get disk type */ v86.ctl = V86_FLAGS; v86.addr = 0x13; v86.eax = 0x1500; v86.edx = bd->bd_unit; v86int(); if (V86_CY(v86.efl) || (v86.eax & 0x300) == 0) return (0); } ret = 1; if (edd != 0) ret = bd_get_diskinfo_ext(bd); if (ret != 0 || bd->bd_sectors == 0) ret = bd_get_diskinfo_std(bd); if (ret != 0 && bd->bd_unit < 0x80) { /* Set defaults for 1.44 floppy */ bd->bd_cyl = 80; bd->bd_hds = 2; bd->bd_sec = 18; bd->bd_type = 4; bd->bd_sectors = 2880; /* Since we are there, there most likely is no media */ bd->bd_flags |= BD_NO_MEDIA; ret = 0; } if (ret != 0) { if (bd->bd_sectors != 0 && edd != 0) { bd->bd_sec = 63; bd->bd_hds = 255; bd->bd_cyl = (bd->bd_sectors + bd->bd_sec * bd->bd_hds - 1) / bd->bd_sec * bd->bd_hds; } else { printf("Can not get information about %s unit %#x\n", biosdisk.dv_name, bd->bd_unit); return (0); } } if (bd->bd_sec == 0) bd->bd_sec = 63; if (bd->bd_hds == 0) bd->bd_hds = 255; if (bd->bd_sectors == 0) bd->bd_sectors = (uint64_t)bd->bd_cyl * bd->bd_hds * bd->bd_sec; DEBUG("unit 0x%x geometry %d/%d/%d", bd->bd_unit, bd->bd_cyl, bd->bd_hds, bd->bd_sec); return (1); } /* * Print information about disks */ static int bd_print(int verbose) { static char line[80]; struct disk_devdesc dev; int i, ret = 0; if (nbdinfo == 0) return (0); printf("%s devices:", biosdisk.dv_name); if ((ret = pager_output("\n")) != 0) return (ret); for (i = 0; i < nbdinfo; i++) { snprintf(line, sizeof(line), " disk%d: BIOS drive %c (%s%ju X %u):\n", i, (bdinfo[i].bd_unit < 0x80) ? ('A' + bdinfo[i].bd_unit): ('C' + bdinfo[i].bd_unit - 0x80), (bdinfo[i].bd_flags & BD_NO_MEDIA) == BD_NO_MEDIA ? "no media, " : "", (uintmax_t)bdinfo[i].bd_sectors, bdinfo[i].bd_sectorsize); if ((ret = pager_output(line)) != 0) break; if ((bdinfo[i].bd_flags & BD_NO_MEDIA) == BD_NO_MEDIA) continue; dev.dd.d_dev = &biosdisk; dev.dd.d_unit = i; dev.d_slice = -1; dev.d_partition = -1; if (disk_open(&dev, bdinfo[i].bd_sectorsize * bdinfo[i].bd_sectors, bdinfo[i].bd_sectorsize) == 0) { snprintf(line, sizeof(line), " disk%d", i); ret = disk_print(&dev, line, verbose); disk_close(&dev); if (ret != 0) break; } } return (ret); } +/* + * Read disk size from partition. + * This is needed to work around buggy BIOS systems returning + * wrong (truncated) disk media size. + * During bd_probe() we tested if the multiplication of bd_sectors + * would overflow so it should be safe to perform here. + */ +static uint64_t +bd_disk_get_sectors(struct disk_devdesc *dev) +{ + struct disk_devdesc disk; + uint64_t size; + + disk.dd.d_dev = dev->dd.d_dev; + disk.dd.d_unit = dev->dd.d_unit; + disk.d_slice = -1; + disk.d_partition = -1; + disk.d_offset = 0; + + size = BD(dev).bd_sectors * BD(dev).bd_sectorsize; + if (disk_open(&disk, size, BD(dev).bd_sectorsize) == 0) { + (void) disk_ioctl(&disk, DIOCGMEDIASIZE, &size); + disk_close(&disk); + } + return (size / BD(dev).bd_sectorsize); +} + /* * Attempt to open the disk described by (dev) for use by (f). * * Note that the philosophy here is "give them exactly what * they ask for". This is necessary because being too "smart" * about what the user might want leads to complications. * (eg. given no slice or partition value, with a disk that is * sliced - are they after the first BSD slice, or the DOS * slice before it?) */ static int bd_open(struct open_file *f, ...) { struct disk_devdesc *dev; - struct disk_devdesc disk; va_list ap; - uint64_t size; int rc; va_start(ap, f); dev = va_arg(ap, struct disk_devdesc *); va_end(ap); if (dev->dd.d_unit < 0 || dev->dd.d_unit >= nbdinfo) return (EIO); if ((BD(dev).bd_flags & BD_NO_MEDIA) == BD_NO_MEDIA) { if (!bd_int13probe(&BD(dev))) return (EIO); if ((BD(dev).bd_flags & BD_NO_MEDIA) == BD_NO_MEDIA) return (EIO); } - BD(dev).bd_open++; if (BD(dev).bd_bcache == NULL) BD(dev).bd_bcache = bcache_allocate(); - /* - * Read disk size from partition. - * This is needed to work around buggy BIOS systems returning - * wrong (truncated) disk media size. - * During bd_probe() we tested if the mulitplication of bd_sectors - * would overflow so it should be safe to perform here. - */ - disk.dd.d_dev = dev->dd.d_dev; - disk.dd.d_unit = dev->dd.d_unit; - disk.d_slice = -1; - disk.d_partition = -1; - disk.d_offset = 0; - - if (disk_open(&disk, BD(dev).bd_sectors * BD(dev).bd_sectorsize, - BD(dev).bd_sectorsize) == 0) { - - if (disk_ioctl(&disk, DIOCGMEDIASIZE, &size) == 0) { - size /= BD(dev).bd_sectorsize; - if (size > BD(dev).bd_sectors) - BD(dev).bd_sectors = size; - } - disk_close(&disk); - } + if (BD(dev).bd_open == 0) + BD(dev).bd_sectors = bd_disk_get_sectors(dev); + BD(dev).bd_open++; rc = disk_open(dev, BD(dev).bd_sectors * BD(dev).bd_sectorsize, BD(dev).bd_sectorsize); if (rc != 0) { BD(dev).bd_open--; if (BD(dev).bd_open == 0) { bcache_free(BD(dev).bd_bcache); BD(dev).bd_bcache = NULL; } } return (rc); } static int bd_close(struct open_file *f) { struct disk_devdesc *dev; dev = (struct disk_devdesc *)f->f_devdata; BD(dev).bd_open--; if (BD(dev).bd_open == 0) { bcache_free(BD(dev).bd_bcache); BD(dev).bd_bcache = NULL; } return (disk_close(dev)); } static int bd_ioctl(struct open_file *f, u_long cmd, void *data) { struct disk_devdesc *dev; int rc; dev = (struct disk_devdesc *)f->f_devdata; rc = disk_ioctl(dev, cmd, data); if (rc != ENOTTY) return (rc); switch (cmd) { case DIOCGSECTORSIZE: *(uint32_t *)data = BD(dev).bd_sectorsize; break; case DIOCGMEDIASIZE: *(uint64_t *)data = BD(dev).bd_sectors * BD(dev).bd_sectorsize; break; default: return (ENOTTY); } return (0); } static int bd_strategy(void *devdata, int rw, daddr_t dblk, size_t size, char *buf, size_t *rsize) { struct bcache_devdata bcd; struct disk_devdesc *dev; dev = (struct disk_devdesc *)devdata; bcd.dv_strategy = bd_realstrategy; bcd.dv_devdata = devdata; bcd.dv_cache = BD(dev).bd_bcache; return (bcache_strategy(&bcd, rw, dblk + dev->d_offset, size, buf, rsize)); } static int bd_realstrategy(void *devdata, int rw, daddr_t dblk, size_t size, char *buf, size_t *rsize) { struct disk_devdesc *dev = (struct disk_devdesc *)devdata; uint64_t disk_blocks, offset; size_t blks, blkoff, bsize, rest; caddr_t bbuf; int rc; if ((BD(dev).bd_flags & BD_NO_MEDIA) == BD_NO_MEDIA) return (EIO); /* * First make sure the IO size is a multiple of 512 bytes. While we do * process partial reads below, the strategy mechanism is built * assuming IO is a multiple of 512B blocks. If the request is not * a multiple of 512B blocks, it has to be some sort of bug. */ if (size == 0 || (size % BIOSDISK_SECSIZE) != 0) { printf("bd_strategy: %d bytes I/O not multiple of %d\n", size, BIOSDISK_SECSIZE); return (EIO); } DEBUG("open_disk %p", dev); offset = dblk * BIOSDISK_SECSIZE; dblk = offset / BD(dev).bd_sectorsize; blkoff = offset % BD(dev).bd_sectorsize; /* * Check the value of the size argument. We do have quite small * heap (64MB), but we do not know good upper limit, so we check against * INT_MAX here. This will also protect us against possible overflows * while translating block count to bytes. */ if (size > INT_MAX) { DEBUG("too large I/O: %zu bytes", size); return (EIO); } blks = size / BD(dev).bd_sectorsize; if (blks == 0 || (size % BD(dev).bd_sectorsize) != 0) blks++; if (dblk > dblk + blks) return (EIO); if (rsize) *rsize = 0; /* * Get disk blocks, this value is either for whole disk or for * partition. */ if (disk_ioctl(dev, DIOCGMEDIASIZE, &disk_blocks) == 0) { /* DIOCGMEDIASIZE does return bytes. */ disk_blocks /= BD(dev).bd_sectorsize; } else { /* We should not get here. Just try to survive. */ disk_blocks = BD(dev).bd_sectors - dev->d_offset; } /* Validate source block address. */ if (dblk < dev->d_offset || dblk >= dev->d_offset + disk_blocks) return (EIO); /* * Truncate if we are crossing disk or partition end. */ if (dblk + blks >= dev->d_offset + disk_blocks) { blks = dev->d_offset + disk_blocks - dblk; size = blks * BD(dev).bd_sectorsize; DEBUG("short I/O %d", blks); } if (V86_IO_BUFFER_SIZE / BD(dev).bd_sectorsize == 0) panic("BUG: Real mode buffer is too small\n"); bbuf = PTOV(V86_IO_BUFFER); rest = size; while (blks > 0) { int x = min(blks, V86_IO_BUFFER_SIZE / BD(dev).bd_sectorsize); switch (rw & F_MASK) { case F_READ: DEBUG("read %d from %lld to %p", x, dblk, buf); bsize = BD(dev).bd_sectorsize * x - blkoff; if (rest < bsize) bsize = rest; if ((rc = bd_io(dev, dblk, x, bbuf, BD_RD)) != 0) return (EIO); bcopy(bbuf + blkoff, buf, bsize); break; case F_WRITE : DEBUG("write %d from %lld to %p", x, dblk, buf); if (blkoff != 0) { /* * We got offset to sector, read 1 sector to * bbuf. */ x = 1; bsize = BD(dev).bd_sectorsize - blkoff; bsize = min(bsize, rest); rc = bd_io(dev, dblk, x, bbuf, BD_RD); } else if (rest < BD(dev).bd_sectorsize) { /* * The remaining block is not full * sector. Read 1 sector to bbuf. */ x = 1; bsize = rest; rc = bd_io(dev, dblk, x, bbuf, BD_RD); } else { /* We can write full sector(s). */ bsize = BD(dev).bd_sectorsize * x; } /* * Put your Data In, Put your Data out, * Put your Data In, and shake it all about */ bcopy(buf, bbuf + blkoff, bsize); if ((rc = bd_io(dev, dblk, x, bbuf, BD_WR)) != 0) return (EIO); break; default: /* DO NOTHING */ return (EROFS); } blkoff = 0; buf += bsize; rest -= bsize; blks -= x; dblk += x; } if (rsize != NULL) *rsize = size; return (0); } static int bd_edd_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest, int dowrite) { static struct edd_packet packet; packet.len = sizeof(struct edd_packet); packet.count = blks; packet.off = VTOPOFF(dest); packet.seg = VTOPSEG(dest); packet.lba = dblk; v86.ctl = V86_FLAGS; v86.addr = 0x13; /* Should we Write with verify ?? 0x4302 ? */ if (dowrite == BD_WR) v86.eax = 0x4300; else v86.eax = 0x4200; v86.edx = BD(dev).bd_unit; v86.ds = VTOPSEG(&packet); v86.esi = VTOPOFF(&packet); v86int(); if (V86_CY(v86.efl)) return (v86.eax >> 8); return (0); } static int bd_chs_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest, int dowrite) { uint32_t x, bpc, cyl, hd, sec; bpc = BD(dev).bd_sec * BD(dev).bd_hds; /* blocks per cylinder */ x = dblk; cyl = x / bpc; /* block # / blocks per cylinder */ x %= bpc; /* block offset into cylinder */ hd = x / BD(dev).bd_sec; /* offset / blocks per track */ sec = x % BD(dev).bd_sec; /* offset into track */ /* correct sector number for 1-based BIOS numbering */ sec++; if (cyl > 1023) { /* CHS doesn't support cylinders > 1023. */ return (1); } v86.ctl = V86_FLAGS; v86.addr = 0x13; if (dowrite == BD_WR) v86.eax = 0x300 | blks; else v86.eax = 0x200 | blks; v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec; v86.edx = (hd << 8) | BD(dev).bd_unit; v86.es = VTOPSEG(dest); v86.ebx = VTOPOFF(dest); v86int(); if (V86_CY(v86.efl)) return (v86.eax >> 8); return (0); } static void bd_io_workaround(struct disk_devdesc *dev) { uint8_t buf[8 * 1024]; bd_edd_io(dev, 0xffffffff, 1, (caddr_t)buf, BD_RD); } static int bd_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest, int dowrite) { int result, retry; /* Just in case some idiot actually tries to read/write -1 blocks... */ if (blks < 0) return (-1); /* * Workaround for a problem with some HP ProLiant BIOS failing to work * out the boot disk after installation. hrs and kuriyama discovered * this problem with an HP ProLiant DL320e Gen 8 with a 3TB HDD, and * discovered that an int13h call seems to cause a buffer overrun in * the bios. The problem is alleviated by doing an extra read before * the buggy read. It is not immediately known whether other models * are similarly affected. * Loop retrying the operation a couple of times. The BIOS * may also retry. */ if (dowrite == BD_RD && dblk >= 0x100000000) bd_io_workaround(dev); for (retry = 0; retry < 3; retry++) { if (BD(dev).bd_flags & BD_MODEEDD) result = bd_edd_io(dev, dblk, blks, dest, dowrite); else result = bd_chs_io(dev, dblk, blks, dest, dowrite); if (result == 0) { if (BD(dev).bd_flags & BD_NO_MEDIA) BD(dev).bd_flags &= ~BD_NO_MEDIA; break; } bd_reset_disk(BD(dev).bd_unit); /* * Error codes: * 20h controller failure * 31h no media in drive (IBM/MS INT 13 extensions) * 80h no media in drive, VMWare (Fusion) * There is no reason to repeat the IO with errors above. */ if (result == 0x20 || result == 0x31 || result == 0x80) { BD(dev).bd_flags |= BD_NO_MEDIA; break; } } if (result != 0 && (BD(dev).bd_flags & BD_NO_MEDIA) == 0) { if (dowrite == BD_WR) { printf("%s%d: Write %d sector(s) from %p (0x%x) " "to %lld: 0x%x\n", dev->dd.d_dev->dv_name, dev->dd.d_unit, blks, dest, VTOP(dest), dblk, result); } else { printf("%s%d: Read %d sector(s) from %lld to %p " "(0x%x): 0x%x\n", dev->dd.d_dev->dv_name, dev->dd.d_unit, blks, dblk, dest, VTOP(dest), result); } } return (result); } /* * Return the BIOS geometry of a given "fixed drive" in a format * suitable for the legacy bootinfo structure. Since the kernel is * expecting raw int 0x13/0x8 values for N_BIOS_GEOM drives, we * prefer to get the information directly, rather than rely on being * able to put it together from information already maintained for * different purposes and for a probably different number of drives. * * For valid drives, the geometry is expected in the format (31..0) * "000000cc cccccccc hhhhhhhh 00ssssss"; and invalid drives are * indicated by returning the geometry of a "1.2M" PC-format floppy * disk. And, incidentally, what is returned is not the geometry as * such but the highest valid cylinder, head, and sector numbers. */ uint32_t bd_getbigeom(int bunit) { v86.ctl = V86_FLAGS; v86.addr = 0x13; v86.eax = 0x800; v86.edx = 0x80 + bunit; v86int(); if (V86_CY(v86.efl)) return (0x4f010f); return (((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) | (v86.edx & 0xff00) | (v86.ecx & 0x3f)); } /* * Return a suitable dev_t value for (dev). * * In the case where it looks like (dev) is a SCSI disk, we allow the number of * IDE disks to be specified in $num_ide_disks. There should be a Better Way. */ int bd_getdev(struct i386_devdesc *d) { struct disk_devdesc *dev; int biosdev; int major; int rootdev; char *nip, *cp; int i, unit; dev = (struct disk_devdesc *)d; biosdev = bd_unit2bios(dev->dd.d_unit); DEBUG("unit %d BIOS device %d", dev->dd.d_unit, biosdev); if (biosdev == -1) /* not a BIOS device */ return (-1); if (disk_open(dev, BD(dev).bd_sectors * BD(dev).bd_sectorsize, BD(dev).bd_sectorsize) != 0) /* oops, not a viable device */ return (-1); else disk_close(dev); if (biosdev < 0x80) { /* floppy (or emulated floppy) or ATAPI device */ if (bdinfo[dev->dd.d_unit].bd_type == DT_ATAPI) { /* is an ATAPI disk */ major = WFDMAJOR; } else { /* is a floppy disk */ major = FDMAJOR; } } else { /* assume an IDE disk */ major = WDMAJOR; } /* default root disk unit number */ unit = biosdev & 0x7f; /* XXX a better kludge to set the root disk unit number */ if ((nip = getenv("root_disk_unit")) != NULL) { i = strtol(nip, &cp, 0); /* check for parse error */ if ((cp != nip) && (*cp == 0)) unit = i; } rootdev = MAKEBOOTDEV(major, dev->d_slice + 1, unit, dev->d_partition); DEBUG("dev is 0x%x\n", rootdev); return (rootdev); }