diff options
Diffstat (limited to 'fs/partitions')
30 files changed, 5414 insertions, 0 deletions
diff --git a/fs/partitions/Kconfig b/fs/partitions/Kconfig new file mode 100644 index 0000000..deb25b6 --- /dev/null +++ b/fs/partitions/Kconfig @@ -0,0 +1,228 @@ +# +# Partition configuration +# +config PARTITION_ADVANCED + bool "Advanced partition selection" + help + Say Y here if you would like to use hard disks under Linux which + were partitioned under an operating system running on a different + architecture than your Linux system. + + Note that the answer to this question won't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about foreign partitioning schemes. + + If unsure, say N. + +config ACORN_PARTITION + bool "Acorn partition support" if PARTITION_ADVANCED + default y if ARCH_ACORN + help + Support hard disks partitioned under Acorn operating systems. + +config ACORN_PARTITION_CUMANA + bool "Cumana partition support" if PARTITION_ADVANCED && ACORN_PARTITION + default y if ARCH_ACORN + help + Say Y here if you would like to use hard disks under Linux which + were partitioned using the Cumana interface on Acorn machines. + +config ACORN_PARTITION_EESOX + bool "EESOX partition support" if PARTITION_ADVANCED && ACORN_PARTITION + default y if ARCH_ACORN + +config ACORN_PARTITION_ICS + bool "ICS partition support" if PARTITION_ADVANCED && ACORN_PARTITION + default y if ARCH_ACORN + help + Say Y here if you would like to use hard disks under Linux which + were partitioned using the ICS interface on Acorn machines. + +config ACORN_PARTITION_ADFS + bool "Native filecore partition support" if PARTITION_ADVANCED && ACORN_PARTITION + default y if ARCH_ACORN + help + The Acorn Disc Filing System is the standard file system of the + RiscOS operating system which runs on Acorn's ARM-based Risc PC + systems and the Acorn Archimedes range of machines. If you say + `Y' here, Linux will support disk partitions created under ADFS. + +config ACORN_PARTITION_POWERTEC + bool "PowerTec partition support" if PARTITION_ADVANCED && ACORN_PARTITION + default y if ARCH_ACORN + help + Support reading partition tables created on Acorn machines using + the PowerTec SCSI drive. + +config ACORN_PARTITION_RISCIX + bool "RISCiX partition support" if PARTITION_ADVANCED && ACORN_PARTITION + default y if ARCH_ACORN + help + Once upon a time, there was a native Unix port for the Acorn series + of machines called RISCiX. If you say 'Y' here, Linux will be able + to read disks partitioned under RISCiX. + +config OSF_PARTITION + bool "Alpha OSF partition support" if PARTITION_ADVANCED + default y if ALPHA + help + Say Y here if you would like to use hard disks under Linux which + were partitioned on an Alpha machine. + +config AMIGA_PARTITION + bool "Amiga partition table support" if PARTITION_ADVANCED + default y if (AMIGA || AFFS_FS=y) + help + Say Y here if you would like to use hard disks under Linux which + were partitioned under AmigaOS. + +config ATARI_PARTITION + bool "Atari partition table support" if PARTITION_ADVANCED + default y if ATARI + help + Say Y here if you would like to use hard disks under Linux which + were partitioned under the Atari OS. + +config IBM_PARTITION + bool "IBM disk label and partition support" + depends on PARTITION_ADVANCED && ARCH_S390 + help + Say Y here if you would like to be able to read the hard disk + partition table format used by IBM DASD disks operating under CMS. + Otherwise, say N. + +config MAC_PARTITION + bool "Macintosh partition map support" if PARTITION_ADVANCED + default y if MAC + help + Say Y here if you would like to use hard disks under Linux which + were partitioned on a Macintosh. + +config MSDOS_PARTITION + bool "PC BIOS (MSDOS partition tables) support" if PARTITION_ADVANCED + default y + help + Say Y here. + +config BSD_DISKLABEL + bool "BSD disklabel (FreeBSD partition tables) support" + depends on PARTITION_ADVANCED && MSDOS_PARTITION + help + FreeBSD uses its own hard disk partition scheme on your PC. It + requires only one entry in the primary partition table of your disk + and manages it similarly to DOS extended partitions, putting in its + first sector a new partition table in BSD disklabel format. Saying Y + here allows you to read these disklabels and further mount FreeBSD + partitions from within Linux if you have also said Y to "UFS + file system support", above. If you don't know what all this is + about, say N. + +config MINIX_SUBPARTITION + bool "Minix subpartition support" + depends on PARTITION_ADVANCED && MSDOS_PARTITION + help + Minix 2.0.0/2.0.2 subpartition table support for Linux. + Say Y here if you want to mount and use Minix 2.0.0/2.0.2 + subpartitions. + +config SOLARIS_X86_PARTITION + bool "Solaris (x86) partition table support" + depends on PARTITION_ADVANCED && MSDOS_PARTITION + help + Like most systems, Solaris x86 uses its own hard disk partition + table format, incompatible with all others. Saying Y here allows you + to read these partition tables and further mount Solaris x86 + partitions from within Linux if you have also said Y to "UFS + file system support", above. + +config UNIXWARE_DISKLABEL + bool "Unixware slices support" + depends on PARTITION_ADVANCED && MSDOS_PARTITION + ---help--- + Like some systems, UnixWare uses its own slice table inside a + partition (VTOC - Virtual Table of Contents). Its format is + incompatible with all other OSes. Saying Y here allows you to read + VTOC and further mount UnixWare partitions read-only from within + Linux if you have also said Y to "UFS file system support" or + "System V and Coherent file system support", above. + + This is mainly used to carry data from a UnixWare box to your + Linux box via a removable medium like magneto-optical, ZIP or + removable IDE drives. Note, however, that a good portable way to + transport files and directories between unixes (and even other + operating systems) is given by the tar program ("man tar" or + preferably "info tar"). + + If you don't know what all this is about, say N. + +config LDM_PARTITION + bool "Windows Logical Disk Manager (Dynamic Disk) support" + depends on PARTITION_ADVANCED + ---help--- + Say Y here if you would like to use hard disks under Linux which + were partitioned using Windows 2000's or XP's Logical Disk Manager. + They are also known as "Dynamic Disks". + + Windows 2000 introduced the concept of Dynamic Disks to get around + the limitations of the PC's partitioning scheme. The Logical Disk + Manager allows the user to repartition a disk and create spanned, + mirrored, striped or RAID volumes, all without the need for + rebooting. + + Normal partitions are now called Basic Disks under Windows 2000 and + XP. + + For a fuller description read <file:Documentation/ldm.txt>. + + If unsure, say N. + +config LDM_DEBUG + bool "Windows LDM extra logging" + depends on LDM_PARTITION + help + Say Y here if you would like LDM to log verbosely. This could be + helpful if the driver doesn't work as expected and you'd like to + report a bug. + + If unsure, say N. + +config SGI_PARTITION + bool "SGI partition support" if PARTITION_ADVANCED + default y if (SGI_IP22 || SGI_IP27 || ((MACH_JAZZ || SNI_RM200_PCI) && !CPU_LITTLE_ENDIAN)) + help + Say Y here if you would like to be able to read the hard disk + partition table format used by SGI machines. + +config ULTRIX_PARTITION + bool "Ultrix partition table support" if PARTITION_ADVANCED + default y if MACH_DECSTATION + help + Say Y here if you would like to be able to read the hard disk + partition table format used by DEC (now Compaq) Ultrix machines. + Otherwise, say N. + +config SUN_PARTITION + bool "Sun partition tables support" if PARTITION_ADVANCED + default y if (SPARC32 || SPARC64 || SUN3 || SUN3X) + ---help--- + Like most systems, SunOS uses its own hard disk partition table + format, incompatible with all others. Saying Y here allows you to + read these partition tables and further mount SunOS partitions from + within Linux if you have also said Y to "UFS file system support", + above. This is mainly used to carry data from a SPARC under SunOS to + your Linux box via a removable medium like magneto-optical or ZIP + drives; note however that a good portable way to transport files and + directories between unixes (and even other operating systems) is + given by the tar program ("man tar" or preferably "info tar"). If + you don't know what all this is about, say N. + +config EFI_PARTITION + bool "EFI GUID Partition support" + depends on PARTITION_ADVANCED + select CRC32 + help + Say Y here if you would like to use hard disks under Linux which + were partitioned using EFI GPT. Presently only useful on the + IA-64 platform. + +# define_bool CONFIG_ACORN_PARTITION_CUMANA y diff --git a/fs/partitions/Makefile b/fs/partitions/Makefile new file mode 100644 index 0000000..4c83c17 --- /dev/null +++ b/fs/partitions/Makefile @@ -0,0 +1,20 @@ +# +# Makefile for the linux kernel. +# + +obj-y := check.o + +obj-$(CONFIG_DEVFS_FS) += devfs.o +obj-$(CONFIG_ACORN_PARTITION) += acorn.o +obj-$(CONFIG_AMIGA_PARTITION) += amiga.o +obj-$(CONFIG_ATARI_PARTITION) += atari.o +obj-$(CONFIG_MAC_PARTITION) += mac.o +obj-$(CONFIG_LDM_PARTITION) += ldm.o +obj-$(CONFIG_MSDOS_PARTITION) += msdos.o +obj-$(CONFIG_OSF_PARTITION) += osf.o +obj-$(CONFIG_SGI_PARTITION) += sgi.o +obj-$(CONFIG_SUN_PARTITION) += sun.o +obj-$(CONFIG_ULTRIX_PARTITION) += ultrix.o +obj-$(CONFIG_IBM_PARTITION) += ibm.o +obj-$(CONFIG_EFI_PARTITION) += efi.o +obj-$(CONFIG_NEC98_PARTITION) += nec98.o msdos.o diff --git a/fs/partitions/acorn.c b/fs/partitions/acorn.c new file mode 100644 index 0000000..c050857 --- /dev/null +++ b/fs/partitions/acorn.c @@ -0,0 +1,557 @@ +/* + * linux/fs/partitions/acorn.c + * + * Copyright (c) 1996-2000 Russell King. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Scan ADFS partitions on hard disk drives. Unfortunately, there + * isn't a standard for partitioning drives on Acorn machines, so + * every single manufacturer of SCSI and IDE cards created their own + * method. + */ +#include <linux/config.h> +#include <linux/buffer_head.h> +#include <linux/adfs_fs.h> + +#include "check.h" +#include "acorn.h" + +/* + * Partition types. (Oh for reusability) + */ +#define PARTITION_RISCIX_MFM 1 +#define PARTITION_RISCIX_SCSI 2 +#define PARTITION_LINUX 9 + +static struct adfs_discrecord * +adfs_partition(struct parsed_partitions *state, char *name, char *data, + unsigned long first_sector, int slot) +{ + struct adfs_discrecord *dr; + unsigned int nr_sects; + + if (adfs_checkbblk(data)) + return NULL; + + dr = (struct adfs_discrecord *)(data + 0x1c0); + + if (dr->disc_size == 0 && dr->disc_size_high == 0) + return NULL; + + nr_sects = (le32_to_cpu(dr->disc_size_high) << 23) | + (le32_to_cpu(dr->disc_size) >> 9); + + if (name) + printk(" [%s]", name); + put_partition(state, slot, first_sector, nr_sects); + return dr; +} + +#ifdef CONFIG_ACORN_PARTITION_RISCIX + +struct riscix_part { + __le32 start; + __le32 length; + __le32 one; + char name[16]; +}; + +struct riscix_record { + __le32 magic; +#define RISCIX_MAGIC cpu_to_le32(0x4a657320) + __le32 date; + struct riscix_part part[8]; +}; + +static int +riscix_partition(struct parsed_partitions *state, struct block_device *bdev, + unsigned long first_sect, int slot, unsigned long nr_sects) +{ + Sector sect; + struct riscix_record *rr; + + rr = (struct riscix_record *)read_dev_sector(bdev, first_sect, §); + if (!rr) + return -1; + + printk(" [RISCiX]"); + + + if (rr->magic == RISCIX_MAGIC) { + unsigned long size = nr_sects > 2 ? 2 : nr_sects; + int part; + + printk(" <"); + + put_partition(state, slot++, first_sect, size); + for (part = 0; part < 8; part++) { + if (rr->part[part].one && + memcmp(rr->part[part].name, "All\0", 4)) { + put_partition(state, slot++, + le32_to_cpu(rr->part[part].start), + le32_to_cpu(rr->part[part].length)); + printk("(%s)", rr->part[part].name); + } + } + + printk(" >\n"); + } else { + put_partition(state, slot++, first_sect, nr_sects); + } + + put_dev_sector(sect); + return slot; +} +#endif + +#define LINUX_NATIVE_MAGIC 0xdeafa1de +#define LINUX_SWAP_MAGIC 0xdeafab1e + +struct linux_part { + __le32 magic; + __le32 start_sect; + __le32 nr_sects; +}; + +static int +linux_partition(struct parsed_partitions *state, struct block_device *bdev, + unsigned long first_sect, int slot, unsigned long nr_sects) +{ + Sector sect; + struct linux_part *linuxp; + unsigned long size = nr_sects > 2 ? 2 : nr_sects; + + printk(" [Linux]"); + + put_partition(state, slot++, first_sect, size); + + linuxp = (struct linux_part *)read_dev_sector(bdev, first_sect, §); + if (!linuxp) + return -1; + + printk(" <"); + while (linuxp->magic == cpu_to_le32(LINUX_NATIVE_MAGIC) || + linuxp->magic == cpu_to_le32(LINUX_SWAP_MAGIC)) { + if (slot == state->limit) + break; + put_partition(state, slot++, first_sect + + le32_to_cpu(linuxp->start_sect), + le32_to_cpu(linuxp->nr_sects)); + linuxp ++; + } + printk(" >"); + + put_dev_sector(sect); + return slot; +} + +#ifdef CONFIG_ACORN_PARTITION_CUMANA +int +adfspart_check_CUMANA(struct parsed_partitions *state, struct block_device *bdev) +{ + unsigned long first_sector = 0; + unsigned int start_blk = 0; + Sector sect; + unsigned char *data; + char *name = "CUMANA/ADFS"; + int first = 1; + int slot = 1; + + /* + * Try Cumana style partitions - sector 6 contains ADFS boot block + * with pointer to next 'drive'. + * + * There are unknowns in this code - is the 'cylinder number' of the + * next partition relative to the start of this one - I'm assuming + * it is. + * + * Also, which ID did Cumana use? + * + * This is totally unfinished, and will require more work to get it + * going. Hence it is totally untested. + */ + do { + struct adfs_discrecord *dr; + unsigned int nr_sects; + + data = read_dev_sector(bdev, start_blk * 2 + 6, §); + if (!data) + return -1; + + if (slot == state->limit) + break; + + dr = adfs_partition(state, name, data, first_sector, slot++); + if (!dr) + break; + + name = NULL; + + nr_sects = (data[0x1fd] + (data[0x1fe] << 8)) * + (dr->heads + (dr->lowsector & 0x40 ? 1 : 0)) * + dr->secspertrack; + + if (!nr_sects) + break; + + first = 0; + first_sector += nr_sects; + start_blk += nr_sects >> (BLOCK_SIZE_BITS - 9); + nr_sects = 0; /* hmm - should be partition size */ + + switch (data[0x1fc] & 15) { + case 0: /* No partition / ADFS? */ + break; + +#ifdef CONFIG_ACORN_PARTITION_RISCIX + case PARTITION_RISCIX_SCSI: + /* RISCiX - we don't know how to find the next one. */ + slot = riscix_partition(state, bdev, first_sector, + slot, nr_sects); + break; +#endif + + case PARTITION_LINUX: + slot = linux_partition(state, bdev, first_sector, + slot, nr_sects); + break; + } + put_dev_sector(sect); + if (slot == -1) + return -1; + } while (1); + put_dev_sector(sect); + return first ? 0 : 1; +} +#endif + +#ifdef CONFIG_ACORN_PARTITION_ADFS +/* + * Purpose: allocate ADFS partitions. + * + * Params : hd - pointer to gendisk structure to store partition info. + * dev - device number to access. + * + * Returns: -1 on error, 0 for no ADFS boot sector, 1 for ok. + * + * Alloc : hda = whole drive + * hda1 = ADFS partition on first drive. + * hda2 = non-ADFS partition. + */ +int +adfspart_check_ADFS(struct parsed_partitions *state, struct block_device *bdev) +{ + unsigned long start_sect, nr_sects, sectscyl, heads; + Sector sect; + unsigned char *data; + struct adfs_discrecord *dr; + unsigned char id; + int slot = 1; + + data = read_dev_sector(bdev, 6, §); + if (!data) + return -1; + + dr = adfs_partition(state, "ADFS", data, 0, slot++); + if (!dr) { + put_dev_sector(sect); + return 0; + } + + heads = dr->heads + ((dr->lowsector >> 6) & 1); + sectscyl = dr->secspertrack * heads; + start_sect = ((data[0x1fe] << 8) + data[0x1fd]) * sectscyl; + id = data[0x1fc] & 15; + put_dev_sector(sect); + +#ifdef CONFIG_BLK_DEV_MFM + if (MAJOR(bdev->bd_dev) == MFM_ACORN_MAJOR) { + extern void xd_set_geometry(struct block_device *, + unsigned char, unsigned char, unsigned int); + xd_set_geometry(bdev, dr->secspertrack, heads, 1); + invalidate_bdev(bdev, 1); + truncate_inode_pages(bdev->bd_inode->i_mapping, 0); + } +#endif + + /* + * Work out start of non-adfs partition. + */ + nr_sects = (bdev->bd_inode->i_size >> 9) - start_sect; + + if (start_sect) { + switch (id) { +#ifdef CONFIG_ACORN_PARTITION_RISCIX + case PARTITION_RISCIX_SCSI: + case PARTITION_RISCIX_MFM: + slot = riscix_partition(state, bdev, start_sect, + slot, nr_sects); + break; +#endif + + case PARTITION_LINUX: + slot = linux_partition(state, bdev, start_sect, + slot, nr_sects); + break; + } + } + printk("\n"); + return 1; +} +#endif + +#ifdef CONFIG_ACORN_PARTITION_ICS + +struct ics_part { + __le32 start; + __le32 size; +}; + +static int adfspart_check_ICSLinux(struct block_device *bdev, unsigned long block) +{ + Sector sect; + unsigned char *data = read_dev_sector(bdev, block, §); + int result = 0; + + if (data) { + if (memcmp(data, "LinuxPart", 9) == 0) + result = 1; + put_dev_sector(sect); + } + + return result; +} + +/* + * Check for a valid ICS partition using the checksum. + */ +static inline int valid_ics_sector(const unsigned char *data) +{ + unsigned long sum; + int i; + + for (i = 0, sum = 0x50617274; i < 508; i++) + sum += data[i]; + + sum -= le32_to_cpu(*(__le32 *)(&data[508])); + + return sum == 0; +} + +/* + * Purpose: allocate ICS partitions. + * Params : hd - pointer to gendisk structure to store partition info. + * dev - device number to access. + * Returns: -1 on error, 0 for no ICS table, 1 for partitions ok. + * Alloc : hda = whole drive + * hda1 = ADFS partition 0 on first drive. + * hda2 = ADFS partition 1 on first drive. + * ..etc.. + */ +int +adfspart_check_ICS(struct parsed_partitions *state, struct block_device *bdev) +{ + const unsigned char *data; + const struct ics_part *p; + int slot; + Sector sect; + + /* + * Try ICS style partitions - sector 0 contains partition info. + */ + data = read_dev_sector(bdev, 0, §); + if (!data) + return -1; + + if (!valid_ics_sector(data)) { + put_dev_sector(sect); + return 0; + } + + printk(" [ICS]"); + + for (slot = 1, p = (const struct ics_part *)data; p->size; p++) { + u32 start = le32_to_cpu(p->start); + s32 size = le32_to_cpu(p->size); /* yes, it's signed. */ + + if (slot == state->limit) + break; + + /* + * Negative sizes tell the RISC OS ICS driver to ignore + * this partition - in effect it says that this does not + * contain an ADFS filesystem. + */ + if (size < 0) { + size = -size; + + /* + * Our own extension - We use the first sector + * of the partition to identify what type this + * partition is. We must not make this visible + * to the filesystem. + */ + if (size > 1 && adfspart_check_ICSLinux(bdev, start)) { + start += 1; + size -= 1; + } + } + + if (size) + put_partition(state, slot++, start, size); + } + + put_dev_sector(sect); + printk("\n"); + return 1; +} +#endif + +#ifdef CONFIG_ACORN_PARTITION_POWERTEC +struct ptec_part { + __le32 unused1; + __le32 unused2; + __le32 start; + __le32 size; + __le32 unused5; + char type[8]; +}; + +static inline int valid_ptec_sector(const unsigned char *data) +{ + unsigned char checksum = 0x2a; + int i; + + /* + * If it looks like a PC/BIOS partition, then it + * probably isn't PowerTec. + */ + if (data[510] == 0x55 && data[511] == 0xaa) + return 0; + + for (i = 0; i < 511; i++) + checksum += data[i]; + + return checksum == data[511]; +} + +/* + * Purpose: allocate ICS partitions. + * Params : hd - pointer to gendisk structure to store partition info. + * dev - device number to access. + * Returns: -1 on error, 0 for no ICS table, 1 for partitions ok. + * Alloc : hda = whole drive + * hda1 = ADFS partition 0 on first drive. + * hda2 = ADFS partition 1 on first drive. + * ..etc.. + */ +int +adfspart_check_POWERTEC(struct parsed_partitions *state, struct block_device *bdev) +{ + Sector sect; + const unsigned char *data; + const struct ptec_part *p; + int slot = 1; + int i; + + data = read_dev_sector(bdev, 0, §); + if (!data) + return -1; + + if (!valid_ptec_sector(data)) { + put_dev_sector(sect); + return 0; + } + + printk(" [POWERTEC]"); + + for (i = 0, p = (const struct ptec_part *)data; i < 12; i++, p++) { + u32 start = le32_to_cpu(p->start); + u32 size = le32_to_cpu(p->size); + + if (size) + put_partition(state, slot++, start, size); + } + + put_dev_sector(sect); + printk("\n"); + return 1; +} +#endif + +#ifdef CONFIG_ACORN_PARTITION_EESOX +struct eesox_part { + char magic[6]; + char name[10]; + __le32 start; + __le32 unused6; + __le32 unused7; + __le32 unused8; +}; + +/* + * Guess who created this format? + */ +static const char eesox_name[] = { + 'N', 'e', 'i', 'l', ' ', + 'C', 'r', 'i', 't', 'c', 'h', 'e', 'l', 'l', ' ', ' ' +}; + +/* + * EESOX SCSI partition format. + * + * This is a goddamned awful partition format. We don't seem to store + * the size of the partition in this table, only the start addresses. + * + * There are two possibilities where the size comes from: + * 1. The individual ADFS boot block entries that are placed on the disk. + * 2. The start address of the next entry. + */ +int +adfspart_check_EESOX(struct parsed_partitions *state, struct block_device *bdev) +{ + Sector sect; + const unsigned char *data; + unsigned char buffer[256]; + struct eesox_part *p; + sector_t start = 0; + int i, slot = 1; + + data = read_dev_sector(bdev, 7, §); + if (!data) + return -1; + + /* + * "Decrypt" the partition table. God knows why... + */ + for (i = 0; i < 256; i++) + buffer[i] = data[i] ^ eesox_name[i & 15]; + + put_dev_sector(sect); + + for (i = 0, p = (struct eesox_part *)buffer; i < 8; i++, p++) { + sector_t next; + + if (memcmp(p->magic, "Eesox", 6)) + break; + + next = le32_to_cpu(p->start); + if (i) + put_partition(state, slot++, start, next - start); + start = next; + } + + if (i != 0) { + sector_t size; + + size = get_capacity(bdev->bd_disk); + put_partition(state, slot++, start, size - start); + printk("\n"); + } + + return i ? 1 : 0; +} +#endif diff --git a/fs/partitions/acorn.h b/fs/partitions/acorn.h new file mode 100644 index 0000000..81fd50e --- /dev/null +++ b/fs/partitions/acorn.h @@ -0,0 +1,14 @@ +/* + * linux/fs/partitions/acorn.h + * + * Copyright (C) 1996-2001 Russell King. + * + * I _hate_ this partitioning mess - why can't we have one defined + * format, and everyone stick to it? + */ + +int adfspart_check_CUMANA(struct parsed_partitions *state, struct block_device *bdev); +int adfspart_check_ADFS(struct parsed_partitions *state, struct block_device *bdev); +int adfspart_check_ICS(struct parsed_partitions *state, struct block_device *bdev); +int adfspart_check_POWERTEC(struct parsed_partitions *state, struct block_device *bdev); +int adfspart_check_EESOX(struct parsed_partitions *state, struct block_device *bdev); diff --git a/fs/partitions/amiga.c b/fs/partitions/amiga.c new file mode 100644 index 0000000..3068528 --- /dev/null +++ b/fs/partitions/amiga.c @@ -0,0 +1,128 @@ +/* + * fs/partitions/amiga.c + * + * Code extracted from drivers/block/genhd.c + * + * Copyright (C) 1991-1998 Linus Torvalds + * Re-organised Feb 1998 Russell King + */ + +#include <linux/types.h> +#include <linux/affs_hardblocks.h> + +#include "check.h" +#include "amiga.h" + +static __inline__ u32 +checksum_block(__be32 *m, int size) +{ + u32 sum = 0; + + while (size--) + sum += be32_to_cpu(*m++); + return sum; +} + +int +amiga_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + Sector sect; + unsigned char *data; + struct RigidDiskBlock *rdb; + struct PartitionBlock *pb; + int start_sect, nr_sects, blk, part, res = 0; + int blksize = 1; /* Multiplier for disk block size */ + int slot = 1; + char b[BDEVNAME_SIZE]; + + for (blk = 0; ; blk++, put_dev_sector(sect)) { + if (blk == RDB_ALLOCATION_LIMIT) + goto rdb_done; + data = read_dev_sector(bdev, blk, §); + if (!data) { + if (warn_no_part) + printk("Dev %s: unable to read RDB block %d\n", + bdevname(bdev, b), blk); + goto rdb_done; + } + if (*(__be32 *)data != cpu_to_be32(IDNAME_RIGIDDISK)) + continue; + + rdb = (struct RigidDiskBlock *)data; + if (checksum_block((__be32 *)data, be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F) == 0) + break; + /* Try again with 0xdc..0xdf zeroed, Windows might have + * trashed it. + */ + *(__be32 *)(data+0xdc) = 0; + if (checksum_block((__be32 *)data, + be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F)==0) { + printk("Warning: Trashed word at 0xd0 in block %d " + "ignored in checksum calculation\n",blk); + break; + } + + printk("Dev %s: RDB in block %d has bad checksum\n", + bdevname(bdev, b), blk); + } + + /* blksize is blocks per 512 byte standard block */ + blksize = be32_to_cpu( rdb->rdb_BlockBytes ) / 512; + + printk(" RDSK (%d)", blksize * 512); /* Be more informative */ + blk = be32_to_cpu(rdb->rdb_PartitionList); + put_dev_sector(sect); + for (part = 1; blk>0 && part<=16; part++, put_dev_sector(sect)) { + blk *= blksize; /* Read in terms partition table understands */ + data = read_dev_sector(bdev, blk, §); + if (!data) { + if (warn_no_part) + printk("Dev %s: unable to read partition block %d\n", + bdevname(bdev, b), blk); + goto rdb_done; + } + pb = (struct PartitionBlock *)data; + blk = be32_to_cpu(pb->pb_Next); + if (pb->pb_ID != cpu_to_be32(IDNAME_PARTITION)) + continue; + if (checksum_block((__be32 *)pb, be32_to_cpu(pb->pb_SummedLongs) & 0x7F) != 0 ) + continue; + + /* Tell Kernel about it */ + + nr_sects = (be32_to_cpu(pb->pb_Environment[10]) + 1 - + be32_to_cpu(pb->pb_Environment[9])) * + be32_to_cpu(pb->pb_Environment[3]) * + be32_to_cpu(pb->pb_Environment[5]) * + blksize; + if (!nr_sects) + continue; + start_sect = be32_to_cpu(pb->pb_Environment[9]) * + be32_to_cpu(pb->pb_Environment[3]) * + be32_to_cpu(pb->pb_Environment[5]) * + blksize; + put_partition(state,slot++,start_sect,nr_sects); + { + /* Be even more informative to aid mounting */ + char dostype[4]; + __be32 *dt = (__be32 *)dostype; + *dt = pb->pb_Environment[16]; + if (dostype[3] < ' ') + printk(" (%c%c%c^%c)", + dostype[0], dostype[1], + dostype[2], dostype[3] + '@' ); + else + printk(" (%c%c%c%c)", + dostype[0], dostype[1], + dostype[2], dostype[3]); + printk("(res %d spb %d)", + be32_to_cpu(pb->pb_Environment[6]), + be32_to_cpu(pb->pb_Environment[4])); + } + res = 1; + } + printk("\n"); + +rdb_done: + return res; +} diff --git a/fs/partitions/amiga.h b/fs/partitions/amiga.h new file mode 100644 index 0000000..2f3e9ce --- /dev/null +++ b/fs/partitions/amiga.h @@ -0,0 +1,6 @@ +/* + * fs/partitions/amiga.h + */ + +int amiga_partition(struct parsed_partitions *state, struct block_device *bdev); + diff --git a/fs/partitions/atari.c b/fs/partitions/atari.c new file mode 100644 index 0000000..192a6ad --- /dev/null +++ b/fs/partitions/atari.c @@ -0,0 +1,149 @@ +/* + * fs/partitions/atari.c + * + * Code extracted from drivers/block/genhd.c + * + * Copyright (C) 1991-1998 Linus Torvalds + * Re-organised Feb 1998 Russell King + */ + +#include <linux/ctype.h> +#include "check.h" +#include "atari.h" + +/* ++guenther: this should be settable by the user ("make config")?. + */ +#define ICD_PARTS + +/* check if a partition entry looks valid -- Atari format is assumed if at + least one of the primary entries is ok this way */ +#define VALID_PARTITION(pi,hdsiz) \ + (((pi)->flg & 1) && \ + isalnum((pi)->id[0]) && isalnum((pi)->id[1]) && isalnum((pi)->id[2]) && \ + be32_to_cpu((pi)->st) <= (hdsiz) && \ + be32_to_cpu((pi)->st) + be32_to_cpu((pi)->siz) <= (hdsiz)) + +static inline int OK_id(char *s) +{ + return memcmp (s, "GEM", 3) == 0 || memcmp (s, "BGM", 3) == 0 || + memcmp (s, "LNX", 3) == 0 || memcmp (s, "SWP", 3) == 0 || + memcmp (s, "RAW", 3) == 0 ; +} + +int atari_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + Sector sect; + struct rootsector *rs; + struct partition_info *pi; + u32 extensect; + u32 hd_size; + int slot; +#ifdef ICD_PARTS + int part_fmt = 0; /* 0:unknown, 1:AHDI, 2:ICD/Supra */ +#endif + + rs = (struct rootsector *) read_dev_sector(bdev, 0, §); + if (!rs) + return -1; + + /* Verify this is an Atari rootsector: */ + hd_size = bdev->bd_inode->i_size >> 9; + if (!VALID_PARTITION(&rs->part[0], hd_size) && + !VALID_PARTITION(&rs->part[1], hd_size) && + !VALID_PARTITION(&rs->part[2], hd_size) && + !VALID_PARTITION(&rs->part[3], hd_size)) { + /* + * if there's no valid primary partition, assume that no Atari + * format partition table (there's no reliable magic or the like + * :-() + */ + put_dev_sector(sect); + return 0; + } + + pi = &rs->part[0]; + printk (" AHDI"); + for (slot = 1; pi < &rs->part[4] && slot < state->limit; slot++, pi++) { + struct rootsector *xrs; + Sector sect2; + ulong partsect; + + if ( !(pi->flg & 1) ) + continue; + /* active partition */ + if (memcmp (pi->id, "XGM", 3) != 0) { + /* we don't care about other id's */ + put_partition (state, slot, be32_to_cpu(pi->st), + be32_to_cpu(pi->siz)); + continue; + } + /* extension partition */ +#ifdef ICD_PARTS + part_fmt = 1; +#endif + printk(" XGM<"); + partsect = extensect = be32_to_cpu(pi->st); + while (1) { + xrs = (struct rootsector *)read_dev_sector(bdev, partsect, §2); + if (!xrs) { + printk (" block %ld read failed\n", partsect); + put_dev_sector(sect); + return 0; + } + + /* ++roman: sanity check: bit 0 of flg field must be set */ + if (!(xrs->part[0].flg & 1)) { + printk( "\nFirst sub-partition in extended partition is not valid!\n" ); + put_dev_sector(sect2); + break; + } + + put_partition(state, slot, + partsect + be32_to_cpu(xrs->part[0].st), + be32_to_cpu(xrs->part[0].siz)); + + if (!(xrs->part[1].flg & 1)) { + /* end of linked partition list */ + put_dev_sector(sect2); + break; + } + if (memcmp( xrs->part[1].id, "XGM", 3 ) != 0) { + printk("\nID of extended partition is not XGM!\n"); + put_dev_sector(sect2); + break; + } + + partsect = be32_to_cpu(xrs->part[1].st) + extensect; + put_dev_sector(sect2); + if (++slot == state->limit) { + printk( "\nMaximum number of partitions reached!\n" ); + break; + } + } + printk(" >"); + } +#ifdef ICD_PARTS + if ( part_fmt!=1 ) { /* no extended partitions -> test ICD-format */ + pi = &rs->icdpart[0]; + /* sanity check: no ICD format if first partition invalid */ + if (OK_id(pi->id)) { + printk(" ICD<"); + for (; pi < &rs->icdpart[8] && slot < state->limit; slot++, pi++) { + /* accept only GEM,BGM,RAW,LNX,SWP partitions */ + if (!((pi->flg & 1) && OK_id(pi->id))) + continue; + part_fmt = 2; + put_partition (state, slot, + be32_to_cpu(pi->st), + be32_to_cpu(pi->siz)); + } + printk(" >"); + } + } +#endif + put_dev_sector(sect); + + printk ("\n"); + + return 1; +} diff --git a/fs/partitions/atari.h b/fs/partitions/atari.h new file mode 100644 index 0000000..63186b0 --- /dev/null +++ b/fs/partitions/atari.h @@ -0,0 +1,34 @@ +/* + * fs/partitions/atari.h + * Moved by Russell King from: + * + * linux/include/linux/atari_rootsec.h + * definitions for Atari Rootsector layout + * by Andreas Schwab (schwab@ls5.informatik.uni-dortmund.de) + * + * modified for ICD/Supra partitioning scheme restricted to at most 12 + * partitions + * by Guenther Kelleter (guenther@pool.informatik.rwth-aachen.de) + */ + +struct partition_info +{ + u8 flg; /* bit 0: active; bit 7: bootable */ + char id[3]; /* "GEM", "BGM", "XGM", or other */ + __be32 st; /* start of partition */ + __be32 siz; /* length of partition */ +}; + +struct rootsector +{ + char unused[0x156]; /* room for boot code */ + struct partition_info icdpart[8]; /* info for ICD-partitions 5..12 */ + char unused2[0xc]; + u32 hd_siz; /* size of disk in blocks */ + struct partition_info part[4]; + u32 bsl_st; /* start of bad sector list */ + u32 bsl_cnt; /* length of bad sector list */ + u16 checksum; /* checksum for bootable disks */ +} __attribute__((__packed__)); + +int atari_partition(struct parsed_partitions *state, struct block_device *bdev); diff --git a/fs/partitions/check.c b/fs/partitions/check.c new file mode 100644 index 0000000..31cff78 --- /dev/null +++ b/fs/partitions/check.c @@ -0,0 +1,445 @@ +/* + * fs/partitions/check.c + * + * Code extracted from drivers/block/genhd.c + * Copyright (C) 1991-1998 Linus Torvalds + * Re-organised Feb 1998 Russell King + * + * We now have independent partition support from the + * block drivers, which allows all the partition code to + * be grouped in one location, and it to be mostly self + * contained. + * + * Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl} + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/kmod.h> +#include <linux/ctype.h> +#include <linux/devfs_fs_kernel.h> + +#include "check.h" +#include "devfs.h" + +#include "acorn.h" +#include "amiga.h" +#include "atari.h" +#include "ldm.h" +#include "mac.h" +#include "msdos.h" +#include "osf.h" +#include "sgi.h" +#include "sun.h" +#include "ibm.h" +#include "ultrix.h" +#include "efi.h" + +#ifdef CONFIG_BLK_DEV_MD +extern void md_autodetect_dev(dev_t dev); +#endif + +int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/ + +static int (*check_part[])(struct parsed_partitions *, struct block_device *) = { + /* + * Probe partition formats with tables at disk address 0 + * that also have an ADFS boot block at 0xdc0. + */ +#ifdef CONFIG_ACORN_PARTITION_ICS + adfspart_check_ICS, +#endif +#ifdef CONFIG_ACORN_PARTITION_POWERTEC + adfspart_check_POWERTEC, +#endif +#ifdef CONFIG_ACORN_PARTITION_EESOX + adfspart_check_EESOX, +#endif + + /* + * Now move on to formats that only have partition info at + * disk address 0xdc0. Since these may also have stale + * PC/BIOS partition tables, they need to come before + * the msdos entry. + */ +#ifdef CONFIG_ACORN_PARTITION_CUMANA + adfspart_check_CUMANA, +#endif +#ifdef CONFIG_ACORN_PARTITION_ADFS + adfspart_check_ADFS, +#endif + +#ifdef CONFIG_EFI_PARTITION + efi_partition, /* this must come before msdos */ +#endif +#ifdef CONFIG_SGI_PARTITION + sgi_partition, +#endif +#ifdef CONFIG_LDM_PARTITION + ldm_partition, /* this must come before msdos */ +#endif +#ifdef CONFIG_NEC98_PARTITION + nec98_partition, /* must be come before `msdos_partition' */ +#endif +#ifdef CONFIG_MSDOS_PARTITION + msdos_partition, +#endif +#ifdef CONFIG_OSF_PARTITION + osf_partition, +#endif +#ifdef CONFIG_SUN_PARTITION + sun_partition, +#endif +#ifdef CONFIG_AMIGA_PARTITION + amiga_partition, +#endif +#ifdef CONFIG_ATARI_PARTITION + atari_partition, +#endif +#ifdef CONFIG_MAC_PARTITION + mac_partition, +#endif +#ifdef CONFIG_ULTRIX_PARTITION + ultrix_partition, +#endif +#ifdef CONFIG_IBM_PARTITION + ibm_partition, +#endif + NULL +}; + +/* + * disk_name() is used by partition check code and the genhd driver. + * It formats the devicename of the indicated disk into + * the supplied buffer (of size at least 32), and returns + * a pointer to that same buffer (for convenience). + */ + +char *disk_name(struct gendisk *hd, int part, char *buf) +{ + if (!part) + snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); + else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) + snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, part); + else + snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, part); + + return buf; +} + +const char *bdevname(struct block_device *bdev, char *buf) +{ + int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; + return disk_name(bdev->bd_disk, part, buf); +} + +EXPORT_SYMBOL(bdevname); + +/* + * There's very little reason to use this, you should really + * have a struct block_device just about everywhere and use + * bdevname() instead. + */ +const char *__bdevname(dev_t dev, char *buffer) +{ + scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)", + MAJOR(dev), MINOR(dev)); + return buffer; +} + +EXPORT_SYMBOL(__bdevname); + +static struct parsed_partitions * +check_partition(struct gendisk *hd, struct block_device *bdev) +{ + struct parsed_partitions *state; + int i, res; + + state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL); + if (!state) + return NULL; + +#ifdef CONFIG_DEVFS_FS + if (hd->devfs_name[0] != '\0') { + printk(KERN_INFO " /dev/%s:", hd->devfs_name); + sprintf(state->name, "p"); + } +#endif + else { + disk_name(hd, 0, state->name); + printk(KERN_INFO " %s:", state->name); + if (isdigit(state->name[strlen(state->name)-1])) + sprintf(state->name, "p"); + } + state->limit = hd->minors; + i = res = 0; + while (!res && check_part[i]) { + memset(&state->parts, 0, sizeof(state->parts)); + res = check_part[i++](state, bdev); + } + if (res > 0) + return state; + if (!res) + printk(" unknown partition table\n"); + else if (warn_no_part) + printk(" unable to read partition table\n"); + kfree(state); + return NULL; +} + +/* + * sysfs bindings for partitions + */ + +struct part_attribute { + struct attribute attr; + ssize_t (*show)(struct hd_struct *,char *); +}; + +static ssize_t +part_attr_show(struct kobject * kobj, struct attribute * attr, char * page) +{ + struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); + struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); + ssize_t ret = 0; + if (part_attr->show) + ret = part_attr->show(p,page); + return ret; +} + +static struct sysfs_ops part_sysfs_ops = { + .show = part_attr_show, +}; + +static ssize_t part_dev_read(struct hd_struct * p, char *page) +{ + struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj); + dev_t dev = MKDEV(disk->major, disk->first_minor + p->partno); + return print_dev_t(page, dev); +} +static ssize_t part_start_read(struct hd_struct * p, char *page) +{ + return sprintf(page, "%llu\n",(unsigned long long)p->start_sect); +} +static ssize_t part_size_read(struct hd_struct * p, char *page) +{ + return sprintf(page, "%llu\n",(unsigned long long)p->nr_sects); +} +static ssize_t part_stat_read(struct hd_struct * p, char *page) +{ + return sprintf(page, "%8u %8llu %8u %8llu\n", + p->reads, (unsigned long long)p->read_sectors, + p->writes, (unsigned long long)p->write_sectors); +} +static struct part_attribute part_attr_dev = { + .attr = {.name = "dev", .mode = S_IRUGO }, + .show = part_dev_read +}; +static struct part_attribute part_attr_start = { + .attr = {.name = "start", .mode = S_IRUGO }, + .show = part_start_read +}; +static struct part_attribute part_attr_size = { + .attr = {.name = "size", .mode = S_IRUGO }, + .show = part_size_read +}; +static struct part_attribute part_attr_stat = { + .attr = {.name = "stat", .mode = S_IRUGO }, + .show = part_stat_read +}; + +static struct attribute * default_attrs[] = { + &part_attr_dev.attr, + &part_attr_start.attr, + &part_attr_size.attr, + &part_attr_stat.attr, + NULL, +}; + +extern struct subsystem block_subsys; + +static void part_release(struct kobject *kobj) +{ + struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); + kfree(p); +} + +struct kobj_type ktype_part = { + .release = part_release, + .default_attrs = default_attrs, + .sysfs_ops = &part_sysfs_ops, +}; + +void delete_partition(struct gendisk *disk, int part) +{ + struct hd_struct *p = disk->part[part-1]; + if (!p) + return; + if (!p->nr_sects) + return; + disk->part[part-1] = NULL; + p->start_sect = 0; + p->nr_sects = 0; + p->reads = p->writes = p->read_sectors = p->write_sectors = 0; + devfs_remove("%s/part%d", disk->devfs_name, part); + kobject_unregister(&p->kobj); +} + +void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len) +{ + struct hd_struct *p; + + p = kmalloc(sizeof(*p), GFP_KERNEL); + if (!p) + return; + + memset(p, 0, sizeof(*p)); + p->start_sect = start; + p->nr_sects = len; + p->partno = part; + + devfs_mk_bdev(MKDEV(disk->major, disk->first_minor + part), + S_IFBLK|S_IRUSR|S_IWUSR, + "%s/part%d", disk->devfs_name, part); + + if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1])) + snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part); + else + snprintf(p->kobj.name,KOBJ_NAME_LEN,"%s%d",disk->kobj.name,part); + p->kobj.parent = &disk->kobj; + p->kobj.ktype = &ktype_part; + kobject_register(&p->kobj); + disk->part[part-1] = p; +} + +static void disk_sysfs_symlinks(struct gendisk *disk) +{ + struct device *target = get_device(disk->driverfs_dev); + if (target) { + sysfs_create_link(&disk->kobj,&target->kobj,"device"); + sysfs_create_link(&target->kobj,&disk->kobj,"block"); + } +} + +/* Not exported, helper to add_disk(). */ +void register_disk(struct gendisk *disk) +{ + struct block_device *bdev; + char *s; + int err; + + strlcpy(disk->kobj.name,disk->disk_name,KOBJ_NAME_LEN); + /* ewww... some of these buggers have / in name... */ + s = strchr(disk->kobj.name, '/'); + if (s) + *s = '!'; + if ((err = kobject_add(&disk->kobj))) + return; + disk_sysfs_symlinks(disk); + + /* No minors to use for partitions */ + if (disk->minors == 1) { + if (disk->devfs_name[0] != '\0') + devfs_add_disk(disk); + return; + } + + /* always add handle for the whole disk */ + devfs_add_partitioned(disk); + + /* No such device (e.g., media were just removed) */ + if (!get_capacity(disk)) + return; + + bdev = bdget_disk(disk, 0); + if (!bdev) + return; + + bdev->bd_invalidated = 1; + if (blkdev_get(bdev, FMODE_READ, 0) < 0) + return; + blkdev_put(bdev); +} + +int rescan_partitions(struct gendisk *disk, struct block_device *bdev) +{ + struct parsed_partitions *state; + int p, res; + + if (bdev->bd_part_count) + return -EBUSY; + res = invalidate_partition(disk, 0); + if (res) + return res; + bdev->bd_invalidated = 0; + for (p = 1; p < disk->minors; p++) + delete_partition(disk, p); + if (disk->fops->revalidate_disk) + disk->fops->revalidate_disk(disk); + if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) + return 0; + for (p = 1; p < state->limit; p++) { + sector_t size = state->parts[p].size; + sector_t from = state->parts[p].from; + if (!size) + continue; + add_partition(disk, p, from, size); +#ifdef CONFIG_BLK_DEV_MD + if (state->parts[p].flags) + md_autodetect_dev(bdev->bd_dev+p); +#endif + } + kfree(state); + return 0; +} + +unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) +{ + struct address_space *mapping = bdev->bd_inode->i_mapping; + struct page *page; + + page = read_cache_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), + (filler_t *)mapping->a_ops->readpage, NULL); + if (!IS_ERR(page)) { + wait_on_page_locked(page); + if (!PageUptodate(page)) + goto fail; + if (PageError(page)) + goto fail; + p->v = page; + return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9); +fail: + page_cache_release(page); + } + p->v = NULL; + return NULL; +} + +EXPORT_SYMBOL(read_dev_sector); + +void del_gendisk(struct gendisk *disk) +{ + int p; + + /* invalidate stuff */ + for (p = disk->minors - 1; p > 0; p--) { + invalidate_partition(disk, p); + delete_partition(disk, p); + } + invalidate_partition(disk, 0); + disk->capacity = 0; + disk->flags &= ~GENHD_FL_UP; + unlink_gendisk(disk); + disk_stat_set_all(disk, 0); + disk->stamp = disk->stamp_idle = 0; + + devfs_remove_disk(disk); + + if (disk->driverfs_dev) { + sysfs_remove_link(&disk->kobj, "device"); + sysfs_remove_link(&disk->driverfs_dev->kobj, "block"); + put_device(disk->driverfs_dev); + } + kobject_del(&disk->kobj); +} diff --git a/fs/partitions/check.h b/fs/partitions/check.h new file mode 100644 index 0000000..43adcc6 --- /dev/null +++ b/fs/partitions/check.h @@ -0,0 +1,36 @@ +#include <linux/pagemap.h> +#include <linux/blkdev.h> + +/* + * add_gd_partition adds a partitions details to the devices partition + * description. + */ +enum { MAX_PART = 256 }; + +struct parsed_partitions { + char name[BDEVNAME_SIZE]; + struct { + sector_t from; + sector_t size; + int flags; + } parts[MAX_PART]; + int next; + int limit; +}; + +static inline void +put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size) +{ + if (n < p->limit) { + p->parts[n].from = from; + p->parts[n].size = size; + printk(" %s%d", p->name, n); + } +} + +extern int warn_no_part; + +extern void parse_bsd(struct parsed_partitions *state, + struct block_device *bdev, u32 offset, u32 size, + int origin, char *flavour, int max_partitions); + diff --git a/fs/partitions/devfs.c b/fs/partitions/devfs.c new file mode 100644 index 0000000..87f5044 --- /dev/null +++ b/fs/partitions/devfs.c @@ -0,0 +1,130 @@ +/* + * This tries to keep block devices away from devfs as much as possible. + */ +#include <linux/fs.h> +#include <linux/devfs_fs_kernel.h> +#include <linux/vmalloc.h> +#include <linux/genhd.h> +#include <linux/bitops.h> +#include <asm/semaphore.h> + + +struct unique_numspace { + u32 num_free; /* Num free in bits */ + u32 length; /* Array length in bytes */ + unsigned long *bits; + struct semaphore mutex; +}; + +static DECLARE_MUTEX(numspace_mutex); + +static int expand_numspace(struct unique_numspace *s) +{ + u32 length; + void *bits; + + if (s->length < 16) + length = 16; + else + length = s->length << 1; + + bits = vmalloc(length); + if (!bits) + return -ENOMEM; + if (s->bits) { + memcpy(bits, s->bits, s->length); + vfree(s->bits); + } + + s->num_free = (length - s->length) << 3; + s->bits = bits; + memset(bits + s->length, 0, length - s->length); + s->length = length; + + return 0; +} + +static int alloc_unique_number(struct unique_numspace *s) +{ + int rval = 0; + + down(&numspace_mutex); + if (s->num_free < 1) + rval = expand_numspace(s); + if (!rval) { + rval = find_first_zero_bit(s->bits, s->length << 3); + --s->num_free; + __set_bit(rval, s->bits); + } + up(&numspace_mutex); + + return rval; +} + +static void dealloc_unique_number(struct unique_numspace *s, int number) +{ + int old_val; + + if (number >= 0) { + down(&numspace_mutex); + old_val = __test_and_clear_bit(number, s->bits); + if (old_val) + ++s->num_free; + up(&numspace_mutex); + } +} + +static struct unique_numspace disc_numspace; +static struct unique_numspace cdrom_numspace; + +void devfs_add_partitioned(struct gendisk *disk) +{ + char dirname[64], symlink[16]; + + devfs_mk_dir(disk->devfs_name); + devfs_mk_bdev(MKDEV(disk->major, disk->first_minor), + S_IFBLK|S_IRUSR|S_IWUSR, + "%s/disc", disk->devfs_name); + + disk->number = alloc_unique_number(&disc_numspace); + + sprintf(symlink, "discs/disc%d", disk->number); + sprintf(dirname, "../%s", disk->devfs_name); + devfs_mk_symlink(symlink, dirname); + +} + +void devfs_add_disk(struct gendisk *disk) +{ + devfs_mk_bdev(MKDEV(disk->major, disk->first_minor), + (disk->flags & GENHD_FL_CD) ? + S_IFBLK|S_IRUGO|S_IWUGO : + S_IFBLK|S_IRUSR|S_IWUSR, + "%s", disk->devfs_name); + + if (disk->flags & GENHD_FL_CD) { + char dirname[64], symlink[16]; + + disk->number = alloc_unique_number(&cdrom_numspace); + + sprintf(symlink, "cdroms/cdrom%d", disk->number); + sprintf(dirname, "../%s", disk->devfs_name); + devfs_mk_symlink(symlink, dirname); + } +} + +void devfs_remove_disk(struct gendisk *disk) +{ + if (disk->minors != 1) { + devfs_remove("discs/disc%d", disk->number); + dealloc_unique_number(&disc_numspace, disk->number); + devfs_remove("%s/disc", disk->devfs_name); + } + if (disk->flags & GENHD_FL_CD) { + devfs_remove("cdroms/cdrom%d", disk->number); + dealloc_unique_number(&cdrom_numspace, disk->number); + } + devfs_remove(disk->devfs_name); +} + + diff --git a/fs/partitions/devfs.h b/fs/partitions/devfs.h new file mode 100644 index 0000000..176118b --- /dev/null +++ b/fs/partitions/devfs.h @@ -0,0 +1,10 @@ + +#ifdef CONFIG_DEVFS_FS +void devfs_add_disk(struct gendisk *dev); +void devfs_add_partitioned(struct gendisk *dev); +void devfs_remove_disk(struct gendisk *dev); +#else +# define devfs_add_disk(disk) do { } while (0) +# define devfs_add_partitioned(disk) do { } while (0) +# define devfs_remove_disk(disk) do { } while (0) +#endif diff --git a/fs/partitions/efi.c b/fs/partitions/efi.c new file mode 100644 index 0000000..0f5b017 --- /dev/null +++ b/fs/partitions/efi.c @@ -0,0 +1,645 @@ +/************************************************************ + * EFI GUID Partition Table handling + * Per Intel EFI Specification v1.02 + * http://developer.intel.com/technology/efi/efi.htm + * efi.[ch] by Matt Domsch <Matt_Domsch@dell.com> + * Copyright 2000,2001,2002,2004 Dell Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * + * TODO: + * + * Changelog: + * Mon Nov 09 2004 Matt Domsch <Matt_Domsch@dell.com> + * - test for valid PMBR and valid PGPT before ever reading + * AGPT, allow override with 'gpt' kernel command line option. + * - check for first/last_usable_lba outside of size of disk + * + * Tue Mar 26 2002 Matt Domsch <Matt_Domsch@dell.com> + * - Ported to 2.5.7-pre1 and 2.5.7-dj2 + * - Applied patch to avoid fault in alternate header handling + * - cleaned up find_valid_gpt + * - On-disk structure and copy in memory is *always* LE now - + * swab fields as needed + * - remove print_gpt_header() + * - only use first max_p partition entries, to keep the kernel minor number + * and partition numbers tied. + * + * Mon Feb 04 2002 Matt Domsch <Matt_Domsch@dell.com> + * - Removed __PRIPTR_PREFIX - not being used + * + * Mon Jan 14 2002 Matt Domsch <Matt_Domsch@dell.com> + * - Ported to 2.5.2-pre11 + library crc32 patch Linus applied + * + * Thu Dec 6 2001 Matt Domsch <Matt_Domsch@dell.com> + * - Added compare_gpts(). + * - moved le_efi_guid_to_cpus() back into this file. GPT is the only + * thing that keeps EFI GUIDs on disk. + * - Changed gpt structure names and members to be simpler and more Linux-like. + * + * Wed Oct 17 2001 Matt Domsch <Matt_Domsch@dell.com> + * - Removed CONFIG_DEVFS_VOLUMES_UUID code entirely per Martin Wilck + * + * Wed Oct 10 2001 Matt Domsch <Matt_Domsch@dell.com> + * - Changed function comments to DocBook style per Andreas Dilger suggestion. + * + * Mon Oct 08 2001 Matt Domsch <Matt_Domsch@dell.com> + * - Change read_lba() to use the page cache per Al Viro's work. + * - print u64s properly on all architectures + * - fixed debug_printk(), now Dprintk() + * + * Mon Oct 01 2001 Matt Domsch <Matt_Domsch@dell.com> + * - Style cleanups + * - made most functions static + * - Endianness addition + * - remove test for second alternate header, as it's not per spec, + * and is unnecessary. There's now a method to read/write the last + * sector of an odd-sized disk from user space. No tools have ever + * been released which used this code, so it's effectively dead. + * - Per Asit Mallick of Intel, added a test for a valid PMBR. + * - Added kernel command line option 'gpt' to override valid PMBR test. + * + * Wed Jun 6 2001 Martin Wilck <Martin.Wilck@Fujitsu-Siemens.com> + * - added devfs volume UUID support (/dev/volumes/uuids) for + * mounting file systems by the partition GUID. + * + * Tue Dec 5 2000 Matt Domsch <Matt_Domsch@dell.com> + * - Moved crc32() to linux/lib, added efi_crc32(). + * + * Thu Nov 30 2000 Matt Domsch <Matt_Domsch@dell.com> + * - Replaced Intel's CRC32 function with an equivalent + * non-license-restricted version. + * + * Wed Oct 25 2000 Matt Domsch <Matt_Domsch@dell.com> + * - Fixed the last_lba() call to return the proper last block + * + * Thu Oct 12 2000 Matt Domsch <Matt_Domsch@dell.com> + * - Thanks to Andries Brouwer for his debugging assistance. + * - Code works, detects all the partitions. + * + ************************************************************/ +#include <linux/config.h> +#include <linux/crc32.h> +#include "check.h" +#include "efi.h" + +#undef EFI_DEBUG +#ifdef EFI_DEBUG +#define Dprintk(x...) printk(KERN_DEBUG x) +#else +#define Dprintk(x...) +#endif + +/* This allows a kernel command line option 'gpt' to override + * the test for invalid PMBR. Not __initdata because reloading + * the partition tables happens after init too. + */ +static int force_gpt; +static int __init +force_gpt_fn(char *str) +{ + force_gpt = 1; + return 1; +} +__setup("gpt", force_gpt_fn); + + +/** + * efi_crc32() - EFI version of crc32 function + * @buf: buffer to calculate crc32 of + * @len - length of buf + * + * Description: Returns EFI-style CRC32 value for @buf + * + * This function uses the little endian Ethernet polynomial + * but seeds the function with ~0, and xor's with ~0 at the end. + * Note, the EFI Specification, v1.02, has a reference to + * Dr. Dobbs Journal, May 1994 (actually it's in May 1992). + */ +static inline u32 +efi_crc32(const void *buf, unsigned long len) +{ + return (crc32(~0L, buf, len) ^ ~0L); +} + +/** + * last_lba(): return number of last logical block of device + * @bdev: block device + * + * Description: Returns last LBA value on success, 0 on error. + * This is stored (by sd and ide-geometry) in + * the part[0] entry for this disk, and is the number of + * physical sectors available on the disk. + */ +static u64 +last_lba(struct block_device *bdev) +{ + if (!bdev || !bdev->bd_inode) + return 0; + return (bdev->bd_inode->i_size >> 9) - 1ULL; +} + +static inline int +pmbr_part_valid(struct partition *part, u64 lastlba) +{ + if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT && + le32_to_cpu(part->start_sect) == 1UL) + return 1; + return 0; +} + +/** + * is_pmbr_valid(): test Protective MBR for validity + * @mbr: pointer to a legacy mbr structure + * @lastlba: last_lba for the whole device + * + * Description: Returns 1 if PMBR is valid, 0 otherwise. + * Validity depends on two things: + * 1) MSDOS signature is in the last two bytes of the MBR + * 2) One partition of type 0xEE is found + */ +static int +is_pmbr_valid(legacy_mbr *mbr, u64 lastlba) +{ + int i; + if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE) + return 0; + for (i = 0; i < 4; i++) + if (pmbr_part_valid(&mbr->partition_record[i], lastlba)) + return 1; + return 0; +} + +/** + * read_lba(): Read bytes from disk, starting at given LBA + * @bdev + * @lba + * @buffer + * @size_t + * + * Description: Reads @count bytes from @bdev into @buffer. + * Returns number of bytes read on success, 0 on error. + */ +static size_t +read_lba(struct block_device *bdev, u64 lba, u8 * buffer, size_t count) +{ + size_t totalreadcount = 0; + + if (!bdev || !buffer || lba > last_lba(bdev)) + return 0; + + while (count) { + int copied = 512; + Sector sect; + unsigned char *data = read_dev_sector(bdev, lba++, §); + if (!data) + break; + if (copied > count) + copied = count; + memcpy(buffer, data, copied); + put_dev_sector(sect); + buffer += copied; + totalreadcount +=copied; + count -= copied; + } + return totalreadcount; +} + +/** + * alloc_read_gpt_entries(): reads partition entries from disk + * @bdev + * @gpt - GPT header + * + * Description: Returns ptes on success, NULL on error. + * Allocates space for PTEs based on information found in @gpt. + * Notes: remember to free pte when you're done! + */ +static gpt_entry * +alloc_read_gpt_entries(struct block_device *bdev, gpt_header *gpt) +{ + size_t count; + gpt_entry *pte; + if (!bdev || !gpt) + return NULL; + + count = le32_to_cpu(gpt->num_partition_entries) * + le32_to_cpu(gpt->sizeof_partition_entry); + if (!count) + return NULL; + pte = kmalloc(count, GFP_KERNEL); + if (!pte) + return NULL; + memset(pte, 0, count); + + if (read_lba(bdev, le64_to_cpu(gpt->partition_entry_lba), + (u8 *) pte, + count) < count) { + kfree(pte); + pte=NULL; + return NULL; + } + return pte; +} + +/** + * alloc_read_gpt_header(): Allocates GPT header, reads into it from disk + * @bdev + * @lba is the Logical Block Address of the partition table + * + * Description: returns GPT header on success, NULL on error. Allocates + * and fills a GPT header starting at @ from @bdev. + * Note: remember to free gpt when finished with it. + */ +static gpt_header * +alloc_read_gpt_header(struct block_device *bdev, u64 lba) +{ + gpt_header *gpt; + if (!bdev) + return NULL; + + gpt = kmalloc(sizeof (gpt_header), GFP_KERNEL); + if (!gpt) + return NULL; + memset(gpt, 0, sizeof (gpt_header)); + + if (read_lba(bdev, lba, (u8 *) gpt, + sizeof (gpt_header)) < sizeof (gpt_header)) { + kfree(gpt); + gpt=NULL; + return NULL; + } + + return gpt; +} + +/** + * is_gpt_valid() - tests one GPT header and PTEs for validity + * @bdev + * @lba is the logical block address of the GPT header to test + * @gpt is a GPT header ptr, filled on return. + * @ptes is a PTEs ptr, filled on return. + * + * Description: returns 1 if valid, 0 on error. + * If valid, returns pointers to newly allocated GPT header and PTEs. + */ +static int +is_gpt_valid(struct block_device *bdev, u64 lba, + gpt_header **gpt, gpt_entry **ptes) +{ + u32 crc, origcrc; + u64 lastlba; + + if (!bdev || !gpt || !ptes) + return 0; + if (!(*gpt = alloc_read_gpt_header(bdev, lba))) + return 0; + + /* Check the GUID Partition Table signature */ + if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) { + Dprintk("GUID Partition Table Header signature is wrong:" + "%lld != %lld\n", + (unsigned long long)le64_to_cpu((*gpt)->signature), + (unsigned long long)GPT_HEADER_SIGNATURE); + goto fail; + } + + /* Check the GUID Partition Table CRC */ + origcrc = le32_to_cpu((*gpt)->header_crc32); + (*gpt)->header_crc32 = 0; + crc = efi_crc32((const unsigned char *) (*gpt), le32_to_cpu((*gpt)->header_size)); + + if (crc != origcrc) { + Dprintk + ("GUID Partition Table Header CRC is wrong: %x != %x\n", + crc, origcrc); + goto fail; + } + (*gpt)->header_crc32 = cpu_to_le32(origcrc); + + /* Check that the my_lba entry points to the LBA that contains + * the GUID Partition Table */ + if (le64_to_cpu((*gpt)->my_lba) != lba) { + Dprintk("GPT my_lba incorrect: %lld != %lld\n", + (unsigned long long)le64_to_cpu((*gpt)->my_lba), + (unsigned long long)lba); + goto fail; + } + + /* Check the first_usable_lba and last_usable_lba are + * within the disk. + */ + lastlba = last_lba(bdev); + if (le64_to_cpu((*gpt)->first_usable_lba) > lastlba) { + Dprintk("GPT: first_usable_lba incorrect: %lld > %lld\n", + (unsigned long long)le64_to_cpu((*gpt)->first_usable_lba), + (unsigned long long)lastlba); + goto fail; + } + if (le64_to_cpu((*gpt)->last_usable_lba) > lastlba) { + Dprintk("GPT: last_usable_lba incorrect: %lld > %lld\n", + (unsigned long long)le64_to_cpu((*gpt)->last_usable_lba), + (unsigned long long)lastlba); + goto fail; + } + + if (!(*ptes = alloc_read_gpt_entries(bdev, *gpt))) + goto fail; + + /* Check the GUID Partition Entry Array CRC */ + crc = efi_crc32((const unsigned char *) (*ptes), + le32_to_cpu((*gpt)->num_partition_entries) * + le32_to_cpu((*gpt)->sizeof_partition_entry)); + + if (crc != le32_to_cpu((*gpt)->partition_entry_array_crc32)) { + Dprintk("GUID Partitition Entry Array CRC check failed.\n"); + goto fail_ptes; + } + + /* We're done, all's well */ + return 1; + + fail_ptes: + kfree(*ptes); + *ptes = NULL; + fail: + kfree(*gpt); + *gpt = NULL; + return 0; +} + +/** + * is_pte_valid() - tests one PTE for validity + * @pte is the pte to check + * @lastlba is last lba of the disk + * + * Description: returns 1 if valid, 0 on error. + */ +static inline int +is_pte_valid(const gpt_entry *pte, const u64 lastlba) +{ + if ((!efi_guidcmp(pte->partition_type_guid, NULL_GUID)) || + le64_to_cpu(pte->starting_lba) > lastlba || + le64_to_cpu(pte->ending_lba) > lastlba) + return 0; + return 1; +} + +/** + * compare_gpts() - Search disk for valid GPT headers and PTEs + * @pgpt is the primary GPT header + * @agpt is the alternate GPT header + * @lastlba is the last LBA number + * Description: Returns nothing. Sanity checks pgpt and agpt fields + * and prints warnings on discrepancies. + * + */ +static void +compare_gpts(gpt_header *pgpt, gpt_header *agpt, u64 lastlba) +{ + int error_found = 0; + if (!pgpt || !agpt) + return; + if (le64_to_cpu(pgpt->my_lba) != le64_to_cpu(agpt->alternate_lba)) { + printk(KERN_WARNING + "GPT:Primary header LBA != Alt. header alternate_lba\n"); + printk(KERN_WARNING "GPT:%lld != %lld\n", + (unsigned long long)le64_to_cpu(pgpt->my_lba), + (unsigned long long)le64_to_cpu(agpt->alternate_lba)); + error_found++; + } + if (le64_to_cpu(pgpt->alternate_lba) != le64_to_cpu(agpt->my_lba)) { + printk(KERN_WARNING + "GPT:Primary header alternate_lba != Alt. header my_lba\n"); + printk(KERN_WARNING "GPT:%lld != %lld\n", + (unsigned long long)le64_to_cpu(pgpt->alternate_lba), + (unsigned long long)le64_to_cpu(agpt->my_lba)); + error_found++; + } + if (le64_to_cpu(pgpt->first_usable_lba) != + le64_to_cpu(agpt->first_usable_lba)) { + printk(KERN_WARNING "GPT:first_usable_lbas don't match.\n"); + printk(KERN_WARNING "GPT:%lld != %lld\n", + (unsigned long long)le64_to_cpu(pgpt->first_usable_lba), + (unsigned long long)le64_to_cpu(agpt->first_usable_lba)); + error_found++; + } + if (le64_to_cpu(pgpt->last_usable_lba) != + le64_to_cpu(agpt->last_usable_lba)) { + printk(KERN_WARNING "GPT:last_usable_lbas don't match.\n"); + printk(KERN_WARNING "GPT:%lld != %lld\n", + (unsigned long long)le64_to_cpu(pgpt->last_usable_lba), + (unsigned long long)le64_to_cpu(agpt->last_usable_lba)); + error_found++; + } + if (efi_guidcmp(pgpt->disk_guid, agpt->disk_guid)) { + printk(KERN_WARNING "GPT:disk_guids don't match.\n"); + error_found++; + } + if (le32_to_cpu(pgpt->num_partition_entries) != + le32_to_cpu(agpt->num_partition_entries)) { + printk(KERN_WARNING "GPT:num_partition_entries don't match: " + "0x%x != 0x%x\n", + le32_to_cpu(pgpt->num_partition_entries), + le32_to_cpu(agpt->num_partition_entries)); + error_found++; + } + if (le32_to_cpu(pgpt->sizeof_partition_entry) != + le32_to_cpu(agpt->sizeof_partition_entry)) { + printk(KERN_WARNING + "GPT:sizeof_partition_entry values don't match: " + "0x%x != 0x%x\n", + le32_to_cpu(pgpt->sizeof_partition_entry), + le32_to_cpu(agpt->sizeof_partition_entry)); + error_found++; + } + if (le32_to_cpu(pgpt->partition_entry_array_crc32) != + le32_to_cpu(agpt->partition_entry_array_crc32)) { + printk(KERN_WARNING + "GPT:partition_entry_array_crc32 values don't match: " + "0x%x != 0x%x\n", + le32_to_cpu(pgpt->partition_entry_array_crc32), + le32_to_cpu(agpt->partition_entry_array_crc32)); + error_found++; + } + if (le64_to_cpu(pgpt->alternate_lba) != lastlba) { + printk(KERN_WARNING + "GPT:Primary header thinks Alt. header is not at the end of the disk.\n"); + printk(KERN_WARNING "GPT:%lld != %lld\n", + (unsigned long long)le64_to_cpu(pgpt->alternate_lba), + (unsigned long long)lastlba); + error_found++; + } + + if (le64_to_cpu(agpt->my_lba) != lastlba) { + printk(KERN_WARNING + "GPT:Alternate GPT header not at the end of the disk.\n"); + printk(KERN_WARNING "GPT:%lld != %lld\n", + (unsigned long long)le64_to_cpu(agpt->my_lba), + (unsigned long long)lastlba); + error_found++; + } + + if (error_found) + printk(KERN_WARNING + "GPT: Use GNU Parted to correct GPT errors.\n"); + return; +} + +/** + * find_valid_gpt() - Search disk for valid GPT headers and PTEs + * @bdev + * @gpt is a GPT header ptr, filled on return. + * @ptes is a PTEs ptr, filled on return. + * Description: Returns 1 if valid, 0 on error. + * If valid, returns pointers to newly allocated GPT header and PTEs. + * Validity depends on PMBR being valid (or being overridden by the + * 'gpt' kernel command line option) and finding either the Primary + * GPT header and PTEs valid, or the Alternate GPT header and PTEs + * valid. If the Primary GPT header is not valid, the Alternate GPT header + * is not checked unless the 'gpt' kernel command line option is passed. + * This protects against devices which misreport their size, and forces + * the user to decide to use the Alternate GPT. + */ +static int +find_valid_gpt(struct block_device *bdev, gpt_header **gpt, gpt_entry **ptes) +{ + int good_pgpt = 0, good_agpt = 0, good_pmbr = 0; + gpt_header *pgpt = NULL, *agpt = NULL; + gpt_entry *pptes = NULL, *aptes = NULL; + legacy_mbr *legacymbr = NULL; + u64 lastlba; + if (!bdev || !gpt || !ptes) + return 0; + + lastlba = last_lba(bdev); + if (!force_gpt) { + /* This will be added to the EFI Spec. per Intel after v1.02. */ + legacymbr = kmalloc(sizeof (*legacymbr), GFP_KERNEL); + if (legacymbr) { + memset(legacymbr, 0, sizeof (*legacymbr)); + read_lba(bdev, 0, (u8 *) legacymbr, + sizeof (*legacymbr)); + good_pmbr = is_pmbr_valid(legacymbr, lastlba); + kfree(legacymbr); + legacymbr=NULL; + } + if (!good_pmbr) + goto fail; + } + + good_pgpt = is_gpt_valid(bdev, GPT_PRIMARY_PARTITION_TABLE_LBA, + &pgpt, &pptes); + if (good_pgpt) + good_agpt = is_gpt_valid(bdev, + le64_to_cpu(pgpt->alternate_lba), + &agpt, &aptes); + if (!good_agpt && force_gpt) + good_agpt = is_gpt_valid(bdev, lastlba, + &agpt, &aptes); + + /* The obviously unsuccessful case */ + if (!good_pgpt && !good_agpt) + goto fail; + + compare_gpts(pgpt, agpt, lastlba); + + /* The good cases */ + if (good_pgpt) { + *gpt = pgpt; + *ptes = pptes; + kfree(agpt); + kfree(aptes); + if (!good_agpt) { + printk(KERN_WARNING + "Alternate GPT is invalid, " + "using primary GPT.\n"); + } + return 1; + } + else if (good_agpt) { + *gpt = agpt; + *ptes = aptes; + kfree(pgpt); + kfree(pptes); + printk(KERN_WARNING + "Primary GPT is invalid, using alternate GPT.\n"); + return 1; + } + + fail: + kfree(pgpt); + kfree(agpt); + kfree(pptes); + kfree(aptes); + *gpt = NULL; + *ptes = NULL; + return 0; +} + +/** + * efi_partition(struct parsed_partitions *state, struct block_device *bdev) + * @state + * @bdev + * + * Description: called from check.c, if the disk contains GPT + * partitions, sets up partition entries in the kernel. + * + * If the first block on the disk is a legacy MBR, + * it will get handled by msdos_partition(). + * If it's a Protective MBR, we'll handle it here. + * + * We do not create a Linux partition for GPT, but + * only for the actual data partitions. + * Returns: + * -1 if unable to read the partition table + * 0 if this isn't our partition table + * 1 if successful + * + */ +int +efi_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + gpt_header *gpt = NULL; + gpt_entry *ptes = NULL; + u32 i; + + if (!find_valid_gpt(bdev, &gpt, &ptes) || !gpt || !ptes) { + kfree(gpt); + kfree(ptes); + return 0; + } + + Dprintk("GUID Partition Table is valid! Yea!\n"); + + for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) { + if (!is_pte_valid(&ptes[i], last_lba(bdev))) + continue; + + put_partition(state, i+1, le64_to_cpu(ptes[i].starting_lba), + (le64_to_cpu(ptes[i].ending_lba) - + le64_to_cpu(ptes[i].starting_lba) + + 1ULL)); + + /* If this is a RAID volume, tell md */ + if (!efi_guidcmp(ptes[i].partition_type_guid, + PARTITION_LINUX_RAID_GUID)) + state->parts[i+1].flags = 1; + } + kfree(ptes); + kfree(gpt); + printk("\n"); + return 1; +} diff --git a/fs/partitions/efi.h b/fs/partitions/efi.h new file mode 100644 index 0000000..c44fb05 --- /dev/null +++ b/fs/partitions/efi.h @@ -0,0 +1,131 @@ +/************************************************************ + * EFI GUID Partition Table + * Per Intel EFI Specification v1.02 + * http://developer.intel.com/technology/efi/efi.htm + * + * By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000 + * Copyright 2000,2001 Dell Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ************************************************************/ + +#ifndef FS_PART_EFI_H_INCLUDED +#define FS_PART_EFI_H_INCLUDED + +#include <linux/types.h> +#include <linux/config.h> +#include <linux/fs.h> +#include <linux/genhd.h> +#include <linux/kernel.h> +#include <linux/major.h> +#include <linux/string.h> +#include <linux/efi.h> + +#define MSDOS_MBR_SIGNATURE 0xaa55 +#define EFI_PMBR_OSTYPE_EFI 0xEF +#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE + +#define GPT_BLOCK_SIZE 512 +#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL +#define GPT_HEADER_REVISION_V1 0x00010000 +#define GPT_PRIMARY_PARTITION_TABLE_LBA 1 + +#define PARTITION_SYSTEM_GUID \ + EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ + 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) +#define LEGACY_MBR_PARTITION_GUID \ + EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ + 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) +#define PARTITION_MSFT_RESERVED_GUID \ + EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ + 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) +#define PARTITION_BASIC_DATA_GUID \ + EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ + 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) +#define PARTITION_LINUX_RAID_GUID \ + EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ + 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) +#define PARTITION_LINUX_SWAP_GUID \ + EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ + 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) +#define PARTITION_LINUX_LVM_GUID \ + EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ + 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) + +typedef struct _gpt_header { + __le64 signature; + __le32 revision; + __le32 header_size; + __le32 header_crc32; + __le32 reserved1; + __le64 my_lba; + __le64 alternate_lba; + __le64 first_usable_lba; + __le64 last_usable_lba; + efi_guid_t disk_guid; + __le64 partition_entry_lba; + __le32 num_partition_entries; + __le32 sizeof_partition_entry; + __le32 partition_entry_array_crc32; + u8 reserved2[GPT_BLOCK_SIZE - 92]; +} __attribute__ ((packed)) gpt_header; + +typedef struct _gpt_entry_attributes { + u64 required_to_function:1; + u64 reserved:47; + u64 type_guid_specific:16; +} __attribute__ ((packed)) gpt_entry_attributes; + +typedef struct _gpt_entry { + efi_guid_t partition_type_guid; + efi_guid_t unique_partition_guid; + __le64 starting_lba; + __le64 ending_lba; + gpt_entry_attributes attributes; + efi_char16_t partition_name[72 / sizeof (efi_char16_t)]; +} __attribute__ ((packed)) gpt_entry; + +typedef struct _legacy_mbr { + u8 boot_code[440]; + __le32 unique_mbr_signature; + __le16 unknown; + struct partition partition_record[4]; + __le16 signature; +} __attribute__ ((packed)) legacy_mbr; + +/* Functions */ +extern int efi_partition(struct parsed_partitions *state, struct block_device *bdev); + +#endif + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * -------------------------------------------------------------------------- + * Local variables: + * c-indent-level: 4 + * c-brace-imaginary-offset: 0 + * c-brace-offset: -4 + * c-argdecl-indent: 4 + * c-label-offset: -4 + * c-continued-statement-offset: 4 + * c-continued-brace-offset: 0 + * indent-tabs-mode: nil + * tab-width: 8 + * End: + */ diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c new file mode 100644 index 0000000..d59dcbf --- /dev/null +++ b/fs/partitions/ibm.c @@ -0,0 +1,191 @@ +/* + * File...........: linux/fs/partitions/ibm.c + * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> + * Volker Sameske <sameske@de.ibm.com> + * Bugreports.to..: <Linux390@de.ibm.com> + * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 + + * History of changes (starts July 2000) + * 07/10/00 Fixed detection of CMS formatted disks + * 02/13/00 VTOC partition support added + * 12/27/01 fixed PL030593 (CMS reserved minidisk not detected on 64 bit) + * 07/24/03 no longer using contents of freed page for CMS label recognition (BZ3611) + */ + +#include <linux/config.h> +#include <linux/buffer_head.h> +#include <linux/hdreg.h> +#include <linux/slab.h> +#include <asm/dasd.h> +#include <asm/ebcdic.h> +#include <asm/uaccess.h> +#include <asm/vtoc.h> + +#include "check.h" +#include "ibm.h" + +/* + * compute the block number from a + * cyl-cyl-head-head structure + */ +static inline int +cchh2blk (cchh_t *ptr, struct hd_geometry *geo) { + return ptr->cc * geo->heads * geo->sectors + + ptr->hh * geo->sectors; +} + + +/* + * compute the block number from a + * cyl-cyl-head-head-block structure + */ +static inline int +cchhb2blk (cchhb_t *ptr, struct hd_geometry *geo) { + return ptr->cc * geo->heads * geo->sectors + + ptr->hh * geo->sectors + + ptr->b; +} + +/* + */ +int +ibm_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int blocksize, offset, size; + dasd_information_t *info; + struct hd_geometry *geo; + char type[5] = {0,}; + char name[7] = {0,}; + volume_label_t *vlabel; + unsigned char *data; + Sector sect; + + if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL) + goto out_noinfo; + if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL) + goto out_nogeo; + if ((vlabel = kmalloc(sizeof(volume_label_t), GFP_KERNEL)) == NULL) + goto out_novlab; + + if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 || + ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0) + goto out_noioctl; + + if ((blocksize = bdev_hardsect_size(bdev)) <= 0) + goto out_badsect; + + /* + * Get volume label, extract name and type. + */ + data = read_dev_sector(bdev, info->label_block*(blocksize/512), §); + if (data == NULL) + goto out_readerr; + + strncpy (type, data, 4); + if ((!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) + strncpy(name, data + 8, 6); + else + strncpy(name, data + 4, 6); + memcpy (vlabel, data, sizeof(volume_label_t)); + put_dev_sector(sect); + + EBCASC(type, 4); + EBCASC(name, 6); + + /* + * Three different types: CMS1, VOL1 and LNX1/unlabeled + */ + if (strncmp(type, "CMS1", 4) == 0) { + /* + * VM style CMS1 labeled disk + */ + int *label = (int *) vlabel; + + if (label[13] != 0) { + printk("CMS1/%8s(MDSK):", name); + /* disk is reserved minidisk */ + blocksize = label[3]; + offset = label[13]; + size = (label[7] - 1)*(blocksize >> 9); + } else { + printk("CMS1/%8s:", name); + offset = (info->label_block + 1); + size = bdev->bd_inode->i_size >> 9; + } + put_partition(state, 1, offset*(blocksize >> 9), + size-offset*(blocksize >> 9)); + } else if ((strncmp(type, "VOL1", 4) == 0) && + (!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) { + /* + * New style VOL1 labeled disk + */ + unsigned int blk; + int counter; + + printk("VOL1/%8s:", name); + + /* get block number and read then go through format1 labels */ + blk = cchhb2blk(&vlabel->vtoc, geo) + 1; + counter = 0; + while ((data = read_dev_sector(bdev, blk*(blocksize/512), + §)) != NULL) { + format1_label_t f1; + + memcpy(&f1, data, sizeof(format1_label_t)); + put_dev_sector(sect); + + /* skip FMT4 / FMT5 / FMT7 labels */ + if (f1.DS1FMTID == _ascebc['4'] + || f1.DS1FMTID == _ascebc['5'] + || f1.DS1FMTID == _ascebc['7']) { + blk++; + continue; + } + + /* only FMT1 valid at this point */ + if (f1.DS1FMTID != _ascebc['1']) + break; + + /* OK, we got valid partition data */ + offset = cchh2blk(&f1.DS1EXT1.llimit, geo); + size = cchh2blk(&f1.DS1EXT1.ulimit, geo) - + offset + geo->sectors; + if (counter >= state->limit) + break; + put_partition(state, counter + 1, + offset * (blocksize >> 9), + size * (blocksize >> 9)); + counter++; + blk++; + } + } else { + /* + * Old style LNX1 or unlabeled disk + */ + if (strncmp(type, "LNX1", 4) == 0) + printk ("LNX1/%8s:", name); + else + printk("(nonl)/%8s:", name); + offset = (info->label_block + 1); + size = (bdev->bd_inode->i_size >> 9); + put_partition(state, 1, offset*(blocksize >> 9), + size-offset*(blocksize >> 9)); + } + + printk("\n"); + kfree(vlabel); + kfree(geo); + kfree(info); + return 1; + +out_readerr: +out_badsect: +out_noioctl: + kfree(vlabel); +out_novlab: + kfree(geo); +out_nogeo: + kfree(info); +out_noinfo: + return 0; +} diff --git a/fs/partitions/ibm.h b/fs/partitions/ibm.h new file mode 100644 index 0000000..31f85a6 --- /dev/null +++ b/fs/partitions/ibm.h @@ -0,0 +1 @@ +int ibm_partition(struct parsed_partitions *, struct block_device *); diff --git a/fs/partitions/ldm.c b/fs/partitions/ldm.c new file mode 100644 index 0000000..7ab1c11 --- /dev/null +++ b/fs/partitions/ldm.c @@ -0,0 +1,1483 @@ +/** + * ldm - Support for Windows Logical Disk Manager (Dynamic Disks) + * + * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org> + * Copyright (c) 2001-2004 Anton Altaparmakov + * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com> + * + * Documentation is available at http://linux-ntfs.sf.net/ldm + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License as published by the Free Software + * Foundation; either version 2 of the License, or (at your option) any later + * version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License along with + * this program (in the main directory of the source in the file COPYING); if + * not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307 USA + */ + +#include <linux/slab.h> +#include <linux/pagemap.h> +#include <linux/stringify.h> +#include "ldm.h" +#include "check.h" +#include "msdos.h" + +typedef enum { + FALSE = 0, + TRUE = 1 +} BOOL; + +/** + * ldm_debug/info/error/crit - Output an error message + * @f: A printf format string containing the message + * @...: Variables to substitute into @f + * + * ldm_debug() writes a DEBUG level message to the syslog but only if the + * driver was compiled with debug enabled. Otherwise, the call turns into a NOP. + */ +#ifndef CONFIG_LDM_DEBUG +#define ldm_debug(...) do {} while (0) +#else +#define ldm_debug(f, a...) _ldm_printk (KERN_DEBUG, __FUNCTION__, f, ##a) +#endif + +#define ldm_crit(f, a...) _ldm_printk (KERN_CRIT, __FUNCTION__, f, ##a) +#define ldm_error(f, a...) _ldm_printk (KERN_ERR, __FUNCTION__, f, ##a) +#define ldm_info(f, a...) _ldm_printk (KERN_INFO, __FUNCTION__, f, ##a) + +__attribute__ ((format (printf, 3, 4))) +static void _ldm_printk (const char *level, const char *function, + const char *fmt, ...) +{ + static char buf[128]; + va_list args; + + va_start (args, fmt); + vsnprintf (buf, sizeof (buf), fmt, args); + va_end (args); + + printk ("%s%s(): %s\n", level, function, buf); +} + + +/** + * ldm_parse_hexbyte - Convert a ASCII hex number to a byte + * @src: Pointer to at least 2 characters to convert. + * + * Convert a two character ASCII hex string to a number. + * + * Return: 0-255 Success, the byte was parsed correctly + * -1 Error, an invalid character was supplied + */ +static int ldm_parse_hexbyte (const u8 *src) +{ + unsigned int x; /* For correct wrapping */ + int h; + + /* high part */ + if ((x = src[0] - '0') <= '9'-'0') h = x; + else if ((x = src[0] - 'a') <= 'f'-'a') h = x+10; + else if ((x = src[0] - 'A') <= 'F'-'A') h = x+10; + else return -1; + h <<= 4; + + /* low part */ + if ((x = src[1] - '0') <= '9'-'0') return h | x; + if ((x = src[1] - 'a') <= 'f'-'a') return h | (x+10); + if ((x = src[1] - 'A') <= 'F'-'A') return h | (x+10); + return -1; +} + +/** + * ldm_parse_guid - Convert GUID from ASCII to binary + * @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba + * @dest: Memory block to hold binary GUID (16 bytes) + * + * N.B. The GUID need not be NULL terminated. + * + * Return: TRUE @dest contains binary GUID + * FALSE @dest contents are undefined + */ +static BOOL ldm_parse_guid (const u8 *src, u8 *dest) +{ + static const int size[] = { 4, 2, 2, 2, 6 }; + int i, j, v; + + if (src[8] != '-' || src[13] != '-' || + src[18] != '-' || src[23] != '-') + return FALSE; + + for (j = 0; j < 5; j++, src++) + for (i = 0; i < size[j]; i++, src+=2, *dest++ = v) + if ((v = ldm_parse_hexbyte (src)) < 0) + return FALSE; + + return TRUE; +} + + +/** + * ldm_parse_privhead - Read the LDM Database PRIVHEAD structure + * @data: Raw database PRIVHEAD structure loaded from the device + * @ph: In-memory privhead structure in which to return parsed information + * + * This parses the LDM database PRIVHEAD structure supplied in @data and + * sets up the in-memory privhead structure @ph with the obtained information. + * + * Return: TRUE @ph contains the PRIVHEAD data + * FALSE @ph contents are undefined + */ +static BOOL ldm_parse_privhead (const u8 *data, struct privhead *ph) +{ + BUG_ON (!data || !ph); + + if (MAGIC_PRIVHEAD != BE64 (data)) { + ldm_error ("Cannot find PRIVHEAD structure. LDM database is" + " corrupt. Aborting."); + return FALSE; + } + + ph->ver_major = BE16 (data + 0x000C); + ph->ver_minor = BE16 (data + 0x000E); + ph->logical_disk_start = BE64 (data + 0x011B); + ph->logical_disk_size = BE64 (data + 0x0123); + ph->config_start = BE64 (data + 0x012B); + ph->config_size = BE64 (data + 0x0133); + + if ((ph->ver_major != 2) || (ph->ver_minor != 11)) { + ldm_error ("Expected PRIVHEAD version %d.%d, got %d.%d." + " Aborting.", 2, 11, ph->ver_major, ph->ver_minor); + return FALSE; + } + if (ph->config_size != LDM_DB_SIZE) { /* 1 MiB in sectors. */ + /* Warn the user and continue, carefully */ + ldm_info ("Database is normally %u bytes, it claims to " + "be %llu bytes.", LDM_DB_SIZE, + (unsigned long long)ph->config_size ); + } + if ((ph->logical_disk_size == 0) || + (ph->logical_disk_start + ph->logical_disk_size > ph->config_start)) { + ldm_error ("PRIVHEAD disk size doesn't match real disk size"); + return FALSE; + } + + if (!ldm_parse_guid (data + 0x0030, ph->disk_id)) { + ldm_error ("PRIVHEAD contains an invalid GUID."); + return FALSE; + } + + ldm_debug ("Parsed PRIVHEAD successfully."); + return TRUE; +} + +/** + * ldm_parse_tocblock - Read the LDM Database TOCBLOCK structure + * @data: Raw database TOCBLOCK structure loaded from the device + * @toc: In-memory toc structure in which to return parsed information + * + * This parses the LDM Database TOCBLOCK (table of contents) structure supplied + * in @data and sets up the in-memory tocblock structure @toc with the obtained + * information. + * + * N.B. The *_start and *_size values returned in @toc are not range-checked. + * + * Return: TRUE @toc contains the TOCBLOCK data + * FALSE @toc contents are undefined + */ +static BOOL ldm_parse_tocblock (const u8 *data, struct tocblock *toc) +{ + BUG_ON (!data || !toc); + + if (MAGIC_TOCBLOCK != BE64 (data)) { + ldm_crit ("Cannot find TOCBLOCK, database may be corrupt."); + return FALSE; + } + strncpy (toc->bitmap1_name, data + 0x24, sizeof (toc->bitmap1_name)); + toc->bitmap1_name[sizeof (toc->bitmap1_name) - 1] = 0; + toc->bitmap1_start = BE64 (data + 0x2E); + toc->bitmap1_size = BE64 (data + 0x36); + + if (strncmp (toc->bitmap1_name, TOC_BITMAP1, + sizeof (toc->bitmap1_name)) != 0) { + ldm_crit ("TOCBLOCK's first bitmap is '%s', should be '%s'.", + TOC_BITMAP1, toc->bitmap1_name); + return FALSE; + } + strncpy (toc->bitmap2_name, data + 0x46, sizeof (toc->bitmap2_name)); + toc->bitmap2_name[sizeof (toc->bitmap2_name) - 1] = 0; + toc->bitmap2_start = BE64 (data + 0x50); + toc->bitmap2_size = BE64 (data + 0x58); + if (strncmp (toc->bitmap2_name, TOC_BITMAP2, + sizeof (toc->bitmap2_name)) != 0) { + ldm_crit ("TOCBLOCK's second bitmap is '%s', should be '%s'.", + TOC_BITMAP2, toc->bitmap2_name); + return FALSE; + } + ldm_debug ("Parsed TOCBLOCK successfully."); + return TRUE; +} + +/** + * ldm_parse_vmdb - Read the LDM Database VMDB structure + * @data: Raw database VMDB structure loaded from the device + * @vm: In-memory vmdb structure in which to return parsed information + * + * This parses the LDM Database VMDB structure supplied in @data and sets up + * the in-memory vmdb structure @vm with the obtained information. + * + * N.B. The *_start, *_size and *_seq values will be range-checked later. + * + * Return: TRUE @vm contains VMDB info + * FALSE @vm contents are undefined + */ +static BOOL ldm_parse_vmdb (const u8 *data, struct vmdb *vm) +{ + BUG_ON (!data || !vm); + + if (MAGIC_VMDB != BE32 (data)) { + ldm_crit ("Cannot find the VMDB, database may be corrupt."); + return FALSE; + } + + vm->ver_major = BE16 (data + 0x12); + vm->ver_minor = BE16 (data + 0x14); + if ((vm->ver_major != 4) || (vm->ver_minor != 10)) { + ldm_error ("Expected VMDB version %d.%d, got %d.%d. " + "Aborting.", 4, 10, vm->ver_major, vm->ver_minor); + return FALSE; + } + + vm->vblk_size = BE32 (data + 0x08); + vm->vblk_offset = BE32 (data + 0x0C); + vm->last_vblk_seq = BE32 (data + 0x04); + + ldm_debug ("Parsed VMDB successfully."); + return TRUE; +} + +/** + * ldm_compare_privheads - Compare two privhead objects + * @ph1: First privhead + * @ph2: Second privhead + * + * This compares the two privhead structures @ph1 and @ph2. + * + * Return: TRUE Identical + * FALSE Different + */ +static BOOL ldm_compare_privheads (const struct privhead *ph1, + const struct privhead *ph2) +{ + BUG_ON (!ph1 || !ph2); + + return ((ph1->ver_major == ph2->ver_major) && + (ph1->ver_minor == ph2->ver_minor) && + (ph1->logical_disk_start == ph2->logical_disk_start) && + (ph1->logical_disk_size == ph2->logical_disk_size) && + (ph1->config_start == ph2->config_start) && + (ph1->config_size == ph2->config_size) && + !memcmp (ph1->disk_id, ph2->disk_id, GUID_SIZE)); +} + +/** + * ldm_compare_tocblocks - Compare two tocblock objects + * @toc1: First toc + * @toc2: Second toc + * + * This compares the two tocblock structures @toc1 and @toc2. + * + * Return: TRUE Identical + * FALSE Different + */ +static BOOL ldm_compare_tocblocks (const struct tocblock *toc1, + const struct tocblock *toc2) +{ + BUG_ON (!toc1 || !toc2); + + return ((toc1->bitmap1_start == toc2->bitmap1_start) && + (toc1->bitmap1_size == toc2->bitmap1_size) && + (toc1->bitmap2_start == toc2->bitmap2_start) && + (toc1->bitmap2_size == toc2->bitmap2_size) && + !strncmp (toc1->bitmap1_name, toc2->bitmap1_name, + sizeof (toc1->bitmap1_name)) && + !strncmp (toc1->bitmap2_name, toc2->bitmap2_name, + sizeof (toc1->bitmap2_name))); +} + +/** + * ldm_validate_privheads - Compare the primary privhead with its backups + * @bdev: Device holding the LDM Database + * @ph1: Memory struct to fill with ph contents + * + * Read and compare all three privheads from disk. + * + * The privheads on disk show the size and location of the main disk area and + * the configuration area (the database). The values are range-checked against + * @hd, which contains the real size of the disk. + * + * Return: TRUE Success + * FALSE Error + */ +static BOOL ldm_validate_privheads (struct block_device *bdev, + struct privhead *ph1) +{ + static const int off[3] = { OFF_PRIV1, OFF_PRIV2, OFF_PRIV3 }; + struct privhead *ph[3] = { ph1 }; + Sector sect; + u8 *data; + BOOL result = FALSE; + long num_sects; + int i; + + BUG_ON (!bdev || !ph1); + + ph[1] = kmalloc (sizeof (*ph[1]), GFP_KERNEL); + ph[2] = kmalloc (sizeof (*ph[2]), GFP_KERNEL); + if (!ph[1] || !ph[2]) { + ldm_crit ("Out of memory."); + goto out; + } + + /* off[1 & 2] are relative to ph[0]->config_start */ + ph[0]->config_start = 0; + + /* Read and parse privheads */ + for (i = 0; i < 3; i++) { + data = read_dev_sector (bdev, + ph[0]->config_start + off[i], §); + if (!data) { + ldm_crit ("Disk read failed."); + goto out; + } + result = ldm_parse_privhead (data, ph[i]); + put_dev_sector (sect); + if (!result) { + ldm_error ("Cannot find PRIVHEAD %d.", i+1); /* Log again */ + if (i < 2) + goto out; /* Already logged */ + else + break; /* FIXME ignore for now, 3rd PH can fail on odd-sized disks */ + } + } + + num_sects = bdev->bd_inode->i_size >> 9; + + if ((ph[0]->config_start > num_sects) || + ((ph[0]->config_start + ph[0]->config_size) > num_sects)) { + ldm_crit ("Database extends beyond the end of the disk."); + goto out; + } + + if ((ph[0]->logical_disk_start > ph[0]->config_start) || + ((ph[0]->logical_disk_start + ph[0]->logical_disk_size) + > ph[0]->config_start)) { + ldm_crit ("Disk and database overlap."); + goto out; + } + + if (!ldm_compare_privheads (ph[0], ph[1])) { + ldm_crit ("Primary and backup PRIVHEADs don't match."); + goto out; + } + /* FIXME ignore this for now + if (!ldm_compare_privheads (ph[0], ph[2])) { + ldm_crit ("Primary and backup PRIVHEADs don't match."); + goto out; + }*/ + ldm_debug ("Validated PRIVHEADs successfully."); + result = TRUE; +out: + kfree (ph[1]); + kfree (ph[2]); + return result; +} + +/** + * ldm_validate_tocblocks - Validate the table of contents and its backups + * @bdev: Device holding the LDM Database + * @base: Offset, into @bdev, of the database + * @ldb: Cache of the database structures + * + * Find and compare the four tables of contents of the LDM Database stored on + * @bdev and return the parsed information into @toc1. + * + * The offsets and sizes of the configs are range-checked against a privhead. + * + * Return: TRUE @toc1 contains validated TOCBLOCK info + * FALSE @toc1 contents are undefined + */ +static BOOL ldm_validate_tocblocks (struct block_device *bdev, + unsigned long base, struct ldmdb *ldb) +{ + static const int off[4] = { OFF_TOCB1, OFF_TOCB2, OFF_TOCB3, OFF_TOCB4}; + struct tocblock *tb[4]; + struct privhead *ph; + Sector sect; + u8 *data; + BOOL result = FALSE; + int i; + + BUG_ON (!bdev || !ldb); + + ph = &ldb->ph; + tb[0] = &ldb->toc; + tb[1] = kmalloc (sizeof (*tb[1]), GFP_KERNEL); + tb[2] = kmalloc (sizeof (*tb[2]), GFP_KERNEL); + tb[3] = kmalloc (sizeof (*tb[3]), GFP_KERNEL); + if (!tb[1] || !tb[2] || !tb[3]) { + ldm_crit ("Out of memory."); + goto out; + } + + for (i = 0; i < 4; i++) /* Read and parse all four toc's. */ + { + data = read_dev_sector (bdev, base + off[i], §); + if (!data) { + ldm_crit ("Disk read failed."); + goto out; + } + result = ldm_parse_tocblock (data, tb[i]); + put_dev_sector (sect); + if (!result) + goto out; /* Already logged */ + } + + /* Range check the toc against a privhead. */ + if (((tb[0]->bitmap1_start + tb[0]->bitmap1_size) > ph->config_size) || + ((tb[0]->bitmap2_start + tb[0]->bitmap2_size) > ph->config_size)) { + ldm_crit ("The bitmaps are out of range. Giving up."); + goto out; + } + + if (!ldm_compare_tocblocks (tb[0], tb[1]) || /* Compare all tocs. */ + !ldm_compare_tocblocks (tb[0], tb[2]) || + !ldm_compare_tocblocks (tb[0], tb[3])) { + ldm_crit ("The TOCBLOCKs don't match."); + goto out; + } + + ldm_debug ("Validated TOCBLOCKs successfully."); + result = TRUE; +out: + kfree (tb[1]); + kfree (tb[2]); + kfree (tb[3]); + return result; +} + +/** + * ldm_validate_vmdb - Read the VMDB and validate it + * @bdev: Device holding the LDM Database + * @base: Offset, into @bdev, of the database + * @ldb: Cache of the database structures + * + * Find the vmdb of the LDM Database stored on @bdev and return the parsed + * information in @ldb. + * + * Return: TRUE @ldb contains validated VBDB info + * FALSE @ldb contents are undefined + */ +static BOOL ldm_validate_vmdb (struct block_device *bdev, unsigned long base, + struct ldmdb *ldb) +{ + Sector sect; + u8 *data; + BOOL result = FALSE; + struct vmdb *vm; + struct tocblock *toc; + + BUG_ON (!bdev || !ldb); + + vm = &ldb->vm; + toc = &ldb->toc; + + data = read_dev_sector (bdev, base + OFF_VMDB, §); + if (!data) { + ldm_crit ("Disk read failed."); + return FALSE; + } + + if (!ldm_parse_vmdb (data, vm)) + goto out; /* Already logged */ + + /* Are there uncommitted transactions? */ + if (BE16(data + 0x10) != 0x01) { + ldm_crit ("Database is not in a consistent state. Aborting."); + goto out; + } + + if (vm->vblk_offset != 512) + ldm_info ("VBLKs start at offset 0x%04x.", vm->vblk_offset); + + /* + * The last_vblkd_seq can be before the end of the vmdb, just make sure + * it is not out of bounds. + */ + if ((vm->vblk_size * vm->last_vblk_seq) > (toc->bitmap1_size << 9)) { + ldm_crit ("VMDB exceeds allowed size specified by TOCBLOCK. " + "Database is corrupt. Aborting."); + goto out; + } + + result = TRUE; +out: + put_dev_sector (sect); + return result; +} + + +/** + * ldm_validate_partition_table - Determine whether bdev might be a dynamic disk + * @bdev: Device holding the LDM Database + * + * This function provides a weak test to decide whether the device is a dynamic + * disk or not. It looks for an MS-DOS-style partition table containing at + * least one partition of type 0x42 (formerly SFS, now used by Windows for + * dynamic disks). + * + * N.B. The only possible error can come from the read_dev_sector and that is + * only likely to happen if the underlying device is strange. If that IS + * the case we should return zero to let someone else try. + * + * Return: TRUE @bdev is a dynamic disk + * FALSE @bdev is not a dynamic disk, or an error occurred + */ +static BOOL ldm_validate_partition_table (struct block_device *bdev) +{ + Sector sect; + u8 *data; + struct partition *p; + int i; + BOOL result = FALSE; + + BUG_ON (!bdev); + + data = read_dev_sector (bdev, 0, §); + if (!data) { + ldm_crit ("Disk read failed."); + return FALSE; + } + + if (*(__le16*) (data + 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC)) + goto out; + + p = (struct partition*)(data + 0x01BE); + for (i = 0; i < 4; i++, p++) + if (SYS_IND (p) == WIN2K_DYNAMIC_PARTITION) { + result = TRUE; + break; + } + + if (result) + ldm_debug ("Found W2K dynamic disk partition type."); + +out: + put_dev_sector (sect); + return result; +} + +/** + * ldm_get_disk_objid - Search a linked list of vblk's for a given Disk Id + * @ldb: Cache of the database structures + * + * The LDM Database contains a list of all partitions on all dynamic disks. + * The primary PRIVHEAD, at the beginning of the physical disk, tells us + * the GUID of this disk. This function searches for the GUID in a linked + * list of vblk's. + * + * Return: Pointer, A matching vblk was found + * NULL, No match, or an error + */ +static struct vblk * ldm_get_disk_objid (const struct ldmdb *ldb) +{ + struct list_head *item; + + BUG_ON (!ldb); + + list_for_each (item, &ldb->v_disk) { + struct vblk *v = list_entry (item, struct vblk, list); + if (!memcmp (v->vblk.disk.disk_id, ldb->ph.disk_id, GUID_SIZE)) + return v; + } + + return NULL; +} + +/** + * ldm_create_data_partitions - Create data partitions for this device + * @pp: List of the partitions parsed so far + * @ldb: Cache of the database structures + * + * The database contains ALL the partitions for ALL disk groups, so we need to + * filter out this specific disk. Using the disk's object id, we can find all + * the partitions in the database that belong to this disk. + * + * Add each partition in our database, to the parsed_partitions structure. + * + * N.B. This function creates the partitions in the order it finds partition + * objects in the linked list. + * + * Return: TRUE Partition created + * FALSE Error, probably a range checking problem + */ +static BOOL ldm_create_data_partitions (struct parsed_partitions *pp, + const struct ldmdb *ldb) +{ + struct list_head *item; + struct vblk *vb; + struct vblk *disk; + struct vblk_part *part; + int part_num = 1; + + BUG_ON (!pp || !ldb); + + disk = ldm_get_disk_objid (ldb); + if (!disk) { + ldm_crit ("Can't find the ID of this disk in the database."); + return FALSE; + } + + printk (" [LDM]"); + + /* Create the data partitions */ + list_for_each (item, &ldb->v_part) { + vb = list_entry (item, struct vblk, list); + part = &vb->vblk.part; + + if (part->disk_id != disk->obj_id) + continue; + + put_partition (pp, part_num, ldb->ph.logical_disk_start + + part->start, part->size); + part_num++; + } + + printk ("\n"); + return TRUE; +} + + +/** + * ldm_relative - Calculate the next relative offset + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @base: Size of the previous fixed width fields + * @offset: Cumulative size of the previous variable-width fields + * + * Because many of the VBLK fields are variable-width, it's necessary + * to calculate each offset based on the previous one and the length + * of the field it pointed to. + * + * Return: -1 Error, the calculated offset exceeded the size of the buffer + * n OK, a range-checked offset into buffer + */ +static int ldm_relative (const u8 *buffer, int buflen, int base, int offset) +{ + + base += offset; + if ((!buffer) || (offset < 0) || (base > buflen)) + return -1; + if ((base + buffer[base]) >= buflen) + return -1; + + return buffer[base] + offset + 1; +} + +/** + * ldm_get_vnum - Convert a variable-width, big endian number, into cpu order + * @block: Pointer to the variable-width number to convert + * + * Large numbers in the LDM Database are often stored in a packed format. Each + * number is prefixed by a one byte width marker. All numbers in the database + * are stored in big-endian byte order. This function reads one of these + * numbers and returns the result + * + * N.B. This function DOES NOT perform any range checking, though the most + * it will read is eight bytes. + * + * Return: n A number + * 0 Zero, or an error occurred + */ +static u64 ldm_get_vnum (const u8 *block) +{ + u64 tmp = 0; + u8 length; + + BUG_ON (!block); + + length = *block++; + + if (length && length <= 8) + while (length--) + tmp = (tmp << 8) | *block++; + else + ldm_error ("Illegal length %d.", length); + + return tmp; +} + +/** + * ldm_get_vstr - Read a length-prefixed string into a buffer + * @block: Pointer to the length marker + * @buffer: Location to copy string to + * @buflen: Size of the output buffer + * + * Many of the strings in the LDM Database are not NULL terminated. Instead + * they are prefixed by a one byte length marker. This function copies one of + * these strings into a buffer. + * + * N.B. This function DOES NOT perform any range checking on the input. + * If the buffer is too small, the output will be truncated. + * + * Return: 0, Error and @buffer contents are undefined + * n, String length in characters (excluding NULL) + * buflen-1, String was truncated. + */ +static int ldm_get_vstr (const u8 *block, u8 *buffer, int buflen) +{ + int length; + + BUG_ON (!block || !buffer); + + length = block[0]; + if (length >= buflen) { + ldm_error ("Truncating string %d -> %d.", length, buflen); + length = buflen - 1; + } + memcpy (buffer, block + 1, length); + buffer[length] = 0; + return length; +} + + +/** + * ldm_parse_cmp3 - Read a raw VBLK Component object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Component object (version 3) into a vblk structure. + * + * Return: TRUE @vb contains a Component VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_cmp3 (const u8 *buffer, int buflen, struct vblk *vb) +{ + int r_objid, r_name, r_vstate, r_child, r_parent, r_stripe, r_cols, len; + struct vblk_comp *comp; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + r_vstate = ldm_relative (buffer, buflen, 0x18, r_name); + r_child = ldm_relative (buffer, buflen, 0x1D, r_vstate); + r_parent = ldm_relative (buffer, buflen, 0x2D, r_child); + + if (buffer[0x12] & VBLK_FLAG_COMP_STRIPE) { + r_stripe = ldm_relative (buffer, buflen, 0x2E, r_parent); + r_cols = ldm_relative (buffer, buflen, 0x2E, r_stripe); + len = r_cols; + } else { + r_stripe = 0; + r_cols = 0; + len = r_parent; + } + if (len < 0) + return FALSE; + + len += VBLK_SIZE_CMP3; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + comp = &vb->vblk.comp; + ldm_get_vstr (buffer + 0x18 + r_name, comp->state, + sizeof (comp->state)); + comp->type = buffer[0x18 + r_vstate]; + comp->children = ldm_get_vnum (buffer + 0x1D + r_vstate); + comp->parent_id = ldm_get_vnum (buffer + 0x2D + r_child); + comp->chunksize = r_stripe ? ldm_get_vnum (buffer+r_parent+0x2E) : 0; + + return TRUE; +} + +/** + * ldm_parse_dgr3 - Read a raw VBLK Disk Group object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Disk Group object (version 3) into a vblk structure. + * + * Return: TRUE @vb contains a Disk Group VBLK + * FALSE @vb contents are not defined + */ +static int ldm_parse_dgr3 (const u8 *buffer, int buflen, struct vblk *vb) +{ + int r_objid, r_name, r_diskid, r_id1, r_id2, len; + struct vblk_dgrp *dgrp; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + r_diskid = ldm_relative (buffer, buflen, 0x18, r_name); + + if (buffer[0x12] & VBLK_FLAG_DGR3_IDS) { + r_id1 = ldm_relative (buffer, buflen, 0x24, r_diskid); + r_id2 = ldm_relative (buffer, buflen, 0x24, r_id1); + len = r_id2; + } else { + r_id1 = 0; + r_id2 = 0; + len = r_diskid; + } + if (len < 0) + return FALSE; + + len += VBLK_SIZE_DGR3; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + dgrp = &vb->vblk.dgrp; + ldm_get_vstr (buffer + 0x18 + r_name, dgrp->disk_id, + sizeof (dgrp->disk_id)); + return TRUE; +} + +/** + * ldm_parse_dgr4 - Read a raw VBLK Disk Group object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Disk Group object (version 4) into a vblk structure. + * + * Return: TRUE @vb contains a Disk Group VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_dgr4 (const u8 *buffer, int buflen, struct vblk *vb) +{ + char buf[64]; + int r_objid, r_name, r_id1, r_id2, len; + struct vblk_dgrp *dgrp; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + + if (buffer[0x12] & VBLK_FLAG_DGR4_IDS) { + r_id1 = ldm_relative (buffer, buflen, 0x44, r_name); + r_id2 = ldm_relative (buffer, buflen, 0x44, r_id1); + len = r_id2; + } else { + r_id1 = 0; + r_id2 = 0; + len = r_name; + } + if (len < 0) + return FALSE; + + len += VBLK_SIZE_DGR4; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + dgrp = &vb->vblk.dgrp; + + ldm_get_vstr (buffer + 0x18 + r_objid, buf, sizeof (buf)); + return TRUE; +} + +/** + * ldm_parse_dsk3 - Read a raw VBLK Disk object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Disk object (version 3) into a vblk structure. + * + * Return: TRUE @vb contains a Disk VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_dsk3 (const u8 *buffer, int buflen, struct vblk *vb) +{ + int r_objid, r_name, r_diskid, r_altname, len; + struct vblk_disk *disk; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + r_diskid = ldm_relative (buffer, buflen, 0x18, r_name); + r_altname = ldm_relative (buffer, buflen, 0x18, r_diskid); + len = r_altname; + if (len < 0) + return FALSE; + + len += VBLK_SIZE_DSK3; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + disk = &vb->vblk.disk; + ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name, + sizeof (disk->alt_name)); + if (!ldm_parse_guid (buffer + 0x19 + r_name, disk->disk_id)) + return FALSE; + + return TRUE; +} + +/** + * ldm_parse_dsk4 - Read a raw VBLK Disk object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Disk object (version 4) into a vblk structure. + * + * Return: TRUE @vb contains a Disk VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb) +{ + int r_objid, r_name, len; + struct vblk_disk *disk; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + len = r_name; + if (len < 0) + return FALSE; + + len += VBLK_SIZE_DSK4; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + disk = &vb->vblk.disk; + memcpy (disk->disk_id, buffer + 0x18 + r_name, GUID_SIZE); + return TRUE; +} + +/** + * ldm_parse_prt3 - Read a raw VBLK Partition object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Partition object (version 3) into a vblk structure. + * + * Return: TRUE @vb contains a Partition VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_prt3 (const u8 *buffer, int buflen, struct vblk *vb) +{ + int r_objid, r_name, r_size, r_parent, r_diskid, r_index, len; + struct vblk_part *part; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + r_size = ldm_relative (buffer, buflen, 0x34, r_name); + r_parent = ldm_relative (buffer, buflen, 0x34, r_size); + r_diskid = ldm_relative (buffer, buflen, 0x34, r_parent); + + if (buffer[0x12] & VBLK_FLAG_PART_INDEX) { + r_index = ldm_relative (buffer, buflen, 0x34, r_diskid); + len = r_index; + } else { + r_index = 0; + len = r_diskid; + } + if (len < 0) + return FALSE; + + len += VBLK_SIZE_PRT3; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + part = &vb->vblk.part; + part->start = BE64 (buffer + 0x24 + r_name); + part->volume_offset = BE64 (buffer + 0x2C + r_name); + part->size = ldm_get_vnum (buffer + 0x34 + r_name); + part->parent_id = ldm_get_vnum (buffer + 0x34 + r_size); + part->disk_id = ldm_get_vnum (buffer + 0x34 + r_parent); + if (vb->flags & VBLK_FLAG_PART_INDEX) + part->partnum = buffer[0x35 + r_diskid]; + else + part->partnum = 0; + + return TRUE; +} + +/** + * ldm_parse_vol5 - Read a raw VBLK Volume object into a vblk structure + * @buffer: Block of data being worked on + * @buflen: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK Volume object (version 5) into a vblk structure. + * + * Return: TRUE @vb contains a Volume VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_vol5 (const u8 *buffer, int buflen, struct vblk *vb) +{ + int r_objid, r_name, r_vtype, r_child, r_size, r_id1, r_id2, r_size2; + int r_drive, len; + struct vblk_volu *volu; + + BUG_ON (!buffer || !vb); + + r_objid = ldm_relative (buffer, buflen, 0x18, 0); + r_name = ldm_relative (buffer, buflen, 0x18, r_objid); + r_vtype = ldm_relative (buffer, buflen, 0x18, r_name); + r_child = ldm_relative (buffer, buflen, 0x2E, r_vtype); + r_size = ldm_relative (buffer, buflen, 0x3E, r_child); + + if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) + r_id1 = ldm_relative (buffer, buflen, 0x53, r_size); + else + r_id1 = r_size; + + if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) + r_id2 = ldm_relative (buffer, buflen, 0x53, r_id1); + else + r_id2 = r_id1; + + if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) + r_size2 = ldm_relative (buffer, buflen, 0x53, r_id2); + else + r_size2 = r_id2; + + if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) + r_drive = ldm_relative (buffer, buflen, 0x53, r_size2); + else + r_drive = r_size2; + + len = r_drive; + if (len < 0) + return FALSE; + + len += VBLK_SIZE_VOL5; + if (len != BE32 (buffer + 0x14)) + return FALSE; + + volu = &vb->vblk.volu; + + ldm_get_vstr (buffer + 0x18 + r_name, volu->volume_type, + sizeof (volu->volume_type)); + memcpy (volu->volume_state, buffer + 0x19 + r_vtype, + sizeof (volu->volume_state)); + volu->size = ldm_get_vnum (buffer + 0x3E + r_child); + volu->partition_type = buffer[0x42 + r_size]; + memcpy (volu->guid, buffer + 0x43 + r_size, sizeof (volu->guid)); + if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) { + ldm_get_vstr (buffer + 0x53 + r_size, volu->drive_hint, + sizeof (volu->drive_hint)); + } + return TRUE; +} + +/** + * ldm_parse_vblk - Read a raw VBLK object into a vblk structure + * @buf: Block of data being worked on + * @len: Size of the block of data + * @vb: In-memory vblk in which to return information + * + * Read a raw VBLK object into a vblk structure. This function just reads the + * information common to all VBLK types, then delegates the rest of the work to + * helper functions: ldm_parse_*. + * + * Return: TRUE @vb contains a VBLK + * FALSE @vb contents are not defined + */ +static BOOL ldm_parse_vblk (const u8 *buf, int len, struct vblk *vb) +{ + BOOL result = FALSE; + int r_objid; + + BUG_ON (!buf || !vb); + + r_objid = ldm_relative (buf, len, 0x18, 0); + if (r_objid < 0) { + ldm_error ("VBLK header is corrupt."); + return FALSE; + } + + vb->flags = buf[0x12]; + vb->type = buf[0x13]; + vb->obj_id = ldm_get_vnum (buf + 0x18); + ldm_get_vstr (buf+0x18+r_objid, vb->name, sizeof (vb->name)); + + switch (vb->type) { + case VBLK_CMP3: result = ldm_parse_cmp3 (buf, len, vb); break; + case VBLK_DSK3: result = ldm_parse_dsk3 (buf, len, vb); break; + case VBLK_DSK4: result = ldm_parse_dsk4 (buf, len, vb); break; + case VBLK_DGR3: result = ldm_parse_dgr3 (buf, len, vb); break; + case VBLK_DGR4: result = ldm_parse_dgr4 (buf, len, vb); break; + case VBLK_PRT3: result = ldm_parse_prt3 (buf, len, vb); break; + case VBLK_VOL5: result = ldm_parse_vol5 (buf, len, vb); break; + } + + if (result) + ldm_debug ("Parsed VBLK 0x%llx (type: 0x%02x) ok.", + (unsigned long long) vb->obj_id, vb->type); + else + ldm_error ("Failed to parse VBLK 0x%llx (type: 0x%02x).", + (unsigned long long) vb->obj_id, vb->type); + + return result; +} + + +/** + * ldm_ldmdb_add - Adds a raw VBLK entry to the ldmdb database + * @data: Raw VBLK to add to the database + * @len: Size of the raw VBLK + * @ldb: Cache of the database structures + * + * The VBLKs are sorted into categories. Partitions are also sorted by offset. + * + * N.B. This function does not check the validity of the VBLKs. + * + * Return: TRUE The VBLK was added + * FALSE An error occurred + */ +static BOOL ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb) +{ + struct vblk *vb; + struct list_head *item; + + BUG_ON (!data || !ldb); + + vb = kmalloc (sizeof (*vb), GFP_KERNEL); + if (!vb) { + ldm_crit ("Out of memory."); + return FALSE; + } + + if (!ldm_parse_vblk (data, len, vb)) { + kfree(vb); + return FALSE; /* Already logged */ + } + + /* Put vblk into the correct list. */ + switch (vb->type) { + case VBLK_DGR3: + case VBLK_DGR4: + list_add (&vb->list, &ldb->v_dgrp); + break; + case VBLK_DSK3: + case VBLK_DSK4: + list_add (&vb->list, &ldb->v_disk); + break; + case VBLK_VOL5: + list_add (&vb->list, &ldb->v_volu); + break; + case VBLK_CMP3: + list_add (&vb->list, &ldb->v_comp); + break; + case VBLK_PRT3: + /* Sort by the partition's start sector. */ + list_for_each (item, &ldb->v_part) { + struct vblk *v = list_entry (item, struct vblk, list); + if ((v->vblk.part.disk_id == vb->vblk.part.disk_id) && + (v->vblk.part.start > vb->vblk.part.start)) { + list_add_tail (&vb->list, &v->list); + return TRUE; + } + } + list_add_tail (&vb->list, &ldb->v_part); + break; + } + return TRUE; +} + +/** + * ldm_frag_add - Add a VBLK fragment to a list + * @data: Raw fragment to be added to the list + * @size: Size of the raw fragment + * @frags: Linked list of VBLK fragments + * + * Fragmented VBLKs may not be consecutive in the database, so they are placed + * in a list so they can be pieced together later. + * + * Return: TRUE Success, the VBLK was added to the list + * FALSE Error, a problem occurred + */ +static BOOL ldm_frag_add (const u8 *data, int size, struct list_head *frags) +{ + struct frag *f; + struct list_head *item; + int rec, num, group; + + BUG_ON (!data || !frags); + + group = BE32 (data + 0x08); + rec = BE16 (data + 0x0C); + num = BE16 (data + 0x0E); + if ((num < 1) || (num > 4)) { + ldm_error ("A VBLK claims to have %d parts.", num); + return FALSE; + } + + list_for_each (item, frags) { + f = list_entry (item, struct frag, list); + if (f->group == group) + goto found; + } + + f = kmalloc (sizeof (*f) + size*num, GFP_KERNEL); + if (!f) { + ldm_crit ("Out of memory."); + return FALSE; + } + + f->group = group; + f->num = num; + f->rec = rec; + f->map = 0xFF << num; + + list_add_tail (&f->list, frags); +found: + if (f->map & (1 << rec)) { + ldm_error ("Duplicate VBLK, part %d.", rec); + f->map &= 0x7F; /* Mark the group as broken */ + return FALSE; + } + + f->map |= (1 << rec); + + if (num > 0) { + data += VBLK_SIZE_HEAD; + size -= VBLK_SIZE_HEAD; + } + memcpy (f->data+rec*(size-VBLK_SIZE_HEAD)+VBLK_SIZE_HEAD, data, size); + + return TRUE; +} + +/** + * ldm_frag_free - Free a linked list of VBLK fragments + * @list: Linked list of fragments + * + * Free a linked list of VBLK fragments + * + * Return: none + */ +static void ldm_frag_free (struct list_head *list) +{ + struct list_head *item, *tmp; + + BUG_ON (!list); + + list_for_each_safe (item, tmp, list) + kfree (list_entry (item, struct frag, list)); +} + +/** + * ldm_frag_commit - Validate fragmented VBLKs and add them to the database + * @frags: Linked list of VBLK fragments + * @ldb: Cache of the database structures + * + * Now that all the fragmented VBLKs have been collected, they must be added to + * the database for later use. + * + * Return: TRUE All the fragments we added successfully + * FALSE One or more of the fragments we invalid + */ +static BOOL ldm_frag_commit (struct list_head *frags, struct ldmdb *ldb) +{ + struct frag *f; + struct list_head *item; + + BUG_ON (!frags || !ldb); + + list_for_each (item, frags) { + f = list_entry (item, struct frag, list); + + if (f->map != 0xFF) { + ldm_error ("VBLK group %d is incomplete (0x%02x).", + f->group, f->map); + return FALSE; + } + + if (!ldm_ldmdb_add (f->data, f->num*ldb->vm.vblk_size, ldb)) + return FALSE; /* Already logged */ + } + return TRUE; +} + +/** + * ldm_get_vblks - Read the on-disk database of VBLKs into memory + * @bdev: Device holding the LDM Database + * @base: Offset, into @bdev, of the database + * @ldb: Cache of the database structures + * + * To use the information from the VBLKs, they need to be read from the disk, + * unpacked and validated. We cache them in @ldb according to their type. + * + * Return: TRUE All the VBLKs were read successfully + * FALSE An error occurred + */ +static BOOL ldm_get_vblks (struct block_device *bdev, unsigned long base, + struct ldmdb *ldb) +{ + int size, perbuf, skip, finish, s, v, recs; + u8 *data = NULL; + Sector sect; + BOOL result = FALSE; + LIST_HEAD (frags); + + BUG_ON (!bdev || !ldb); + + size = ldb->vm.vblk_size; + perbuf = 512 / size; + skip = ldb->vm.vblk_offset >> 9; /* Bytes to sectors */ + finish = (size * ldb->vm.last_vblk_seq) >> 9; + + for (s = skip; s < finish; s++) { /* For each sector */ + data = read_dev_sector (bdev, base + OFF_VMDB + s, §); + if (!data) { + ldm_crit ("Disk read failed."); + goto out; + } + + for (v = 0; v < perbuf; v++, data+=size) { /* For each vblk */ + if (MAGIC_VBLK != BE32 (data)) { + ldm_error ("Expected to find a VBLK."); + goto out; + } + + recs = BE16 (data + 0x0E); /* Number of records */ + if (recs == 1) { + if (!ldm_ldmdb_add (data, size, ldb)) + goto out; /* Already logged */ + } else if (recs > 1) { + if (!ldm_frag_add (data, size, &frags)) + goto out; /* Already logged */ + } + /* else Record is not in use, ignore it. */ + } + put_dev_sector (sect); + data = NULL; + } + + result = ldm_frag_commit (&frags, ldb); /* Failures, already logged */ +out: + if (data) + put_dev_sector (sect); + ldm_frag_free (&frags); + + return result; +} + +/** + * ldm_free_vblks - Free a linked list of vblk's + * @lh: Head of a linked list of struct vblk + * + * Free a list of vblk's and free the memory used to maintain the list. + * + * Return: none + */ +static void ldm_free_vblks (struct list_head *lh) +{ + struct list_head *item, *tmp; + + BUG_ON (!lh); + + list_for_each_safe (item, tmp, lh) + kfree (list_entry (item, struct vblk, list)); +} + + +/** + * ldm_partition - Find out whether a device is a dynamic disk and handle it + * @pp: List of the partitions parsed so far + * @bdev: Device holding the LDM Database + * + * This determines whether the device @bdev is a dynamic disk and if so creates + * the partitions necessary in the gendisk structure pointed to by @hd. + * + * We create a dummy device 1, which contains the LDM database, and then create + * each partition described by the LDM database in sequence as devices 2+. For + * example, if the device is hda, we would have: hda1: LDM database, hda2, hda3, + * and so on: the actual data containing partitions. + * + * Return: 1 Success, @bdev is a dynamic disk and we handled it + * 0 Success, @bdev is not a dynamic disk + * -1 An error occurred before enough information had been read + * Or @bdev is a dynamic disk, but it may be corrupted + */ +int ldm_partition (struct parsed_partitions *pp, struct block_device *bdev) +{ + struct ldmdb *ldb; + unsigned long base; + int result = -1; + + BUG_ON (!pp || !bdev); + + /* Look for signs of a Dynamic Disk */ + if (!ldm_validate_partition_table (bdev)) + return 0; + + ldb = kmalloc (sizeof (*ldb), GFP_KERNEL); + if (!ldb) { + ldm_crit ("Out of memory."); + goto out; + } + + /* Parse and check privheads. */ + if (!ldm_validate_privheads (bdev, &ldb->ph)) + goto out; /* Already logged */ + + /* All further references are relative to base (database start). */ + base = ldb->ph.config_start; + + /* Parse and check tocs and vmdb. */ + if (!ldm_validate_tocblocks (bdev, base, ldb) || + !ldm_validate_vmdb (bdev, base, ldb)) + goto out; /* Already logged */ + + /* Initialize vblk lists in ldmdb struct */ + INIT_LIST_HEAD (&ldb->v_dgrp); + INIT_LIST_HEAD (&ldb->v_disk); + INIT_LIST_HEAD (&ldb->v_volu); + INIT_LIST_HEAD (&ldb->v_comp); + INIT_LIST_HEAD (&ldb->v_part); + + if (!ldm_get_vblks (bdev, base, ldb)) { + ldm_crit ("Failed to read the VBLKs from the database."); + goto cleanup; + } + + /* Finally, create the data partition devices. */ + if (ldm_create_data_partitions (pp, ldb)) { + ldm_debug ("Parsed LDM database successfully."); + result = 1; + } + /* else Already logged */ + +cleanup: + ldm_free_vblks (&ldb->v_dgrp); + ldm_free_vblks (&ldb->v_disk); + ldm_free_vblks (&ldb->v_volu); + ldm_free_vblks (&ldb->v_comp); + ldm_free_vblks (&ldb->v_part); +out: + kfree (ldb); + return result; +} + diff --git a/fs/partitions/ldm.h b/fs/partitions/ldm.h new file mode 100644 index 0000000..6e8d795 --- /dev/null +++ b/fs/partitions/ldm.h @@ -0,0 +1,220 @@ +/** + * ldm - Part of the Linux-NTFS project. + * + * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org> + * Copyright (C) 2001 Anton Altaparmakov <aia21@cantab.net> + * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com> + * + * Documentation is available at http://linux-ntfs.sf.net/ldm + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program (in the main directory of the Linux-NTFS source + * in the file COPYING); if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _FS_PT_LDM_H_ +#define _FS_PT_LDM_H_ + +#include <linux/types.h> +#include <linux/list.h> +#include <linux/genhd.h> +#include <linux/fs.h> +#include <asm/unaligned.h> +#include <asm/byteorder.h> + +struct parsed_partitions; + +/* Magic numbers in CPU format. */ +#define MAGIC_VMDB 0x564D4442 /* VMDB */ +#define MAGIC_VBLK 0x56424C4B /* VBLK */ +#define MAGIC_PRIVHEAD 0x5052495648454144ULL /* PRIVHEAD */ +#define MAGIC_TOCBLOCK 0x544F43424C4F434BULL /* TOCBLOCK */ + +/* The defined vblk types. */ +#define VBLK_VOL5 0x51 /* Volume, version 5 */ +#define VBLK_CMP3 0x32 /* Component, version 3 */ +#define VBLK_PRT3 0x33 /* Partition, version 3 */ +#define VBLK_DSK3 0x34 /* Disk, version 3 */ +#define VBLK_DSK4 0x44 /* Disk, version 4 */ +#define VBLK_DGR3 0x35 /* Disk Group, version 3 */ +#define VBLK_DGR4 0x45 /* Disk Group, version 4 */ + +/* vblk flags indicating extra information will be present */ +#define VBLK_FLAG_COMP_STRIPE 0x10 +#define VBLK_FLAG_PART_INDEX 0x08 +#define VBLK_FLAG_DGR3_IDS 0x08 +#define VBLK_FLAG_DGR4_IDS 0x08 +#define VBLK_FLAG_VOLU_ID1 0x08 +#define VBLK_FLAG_VOLU_ID2 0x20 +#define VBLK_FLAG_VOLU_SIZE 0x80 +#define VBLK_FLAG_VOLU_DRIVE 0x02 + +/* size of a vblk's static parts */ +#define VBLK_SIZE_HEAD 16 +#define VBLK_SIZE_CMP3 22 /* Name and version */ +#define VBLK_SIZE_DGR3 12 +#define VBLK_SIZE_DGR4 44 +#define VBLK_SIZE_DSK3 12 +#define VBLK_SIZE_DSK4 45 +#define VBLK_SIZE_PRT3 28 +#define VBLK_SIZE_VOL5 59 + +/* component types */ +#define COMP_STRIPE 0x01 /* Stripe-set */ +#define COMP_BASIC 0x02 /* Basic disk */ +#define COMP_RAID 0x03 /* Raid-set */ + +/* Other constants. */ +#define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */ + +#define OFF_PRIV1 6 /* Offset of the first privhead + relative to the start of the + device in sectors */ + +/* Offsets to structures within the LDM Database in sectors. */ +#define OFF_PRIV2 1856 /* Backup private headers. */ +#define OFF_PRIV3 2047 + +#define OFF_TOCB1 1 /* Tables of contents. */ +#define OFF_TOCB2 2 +#define OFF_TOCB3 2045 +#define OFF_TOCB4 2046 + +#define OFF_VMDB 17 /* List of partitions. */ + +#define WIN2K_DYNAMIC_PARTITION 0x42 /* Formerly SFS (Landis). */ + +#define TOC_BITMAP1 "config" /* Names of the two defined */ +#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */ + +/* Most numbers we deal with are big-endian and won't be aligned. */ +#define BE16(x) ((u16)be16_to_cpu(get_unaligned((__be16*)(x)))) +#define BE32(x) ((u32)be32_to_cpu(get_unaligned((__be32*)(x)))) +#define BE64(x) ((u64)be64_to_cpu(get_unaligned((__be64*)(x)))) + +/* Borrowed from msdos.c */ +#define SYS_IND(p) (get_unaligned(&(p)->sys_ind)) + +struct frag { /* VBLK Fragment handling */ + struct list_head list; + u32 group; + u8 num; /* Total number of records */ + u8 rec; /* This is record number n */ + u8 map; /* Which portions are in use */ + u8 data[0]; +}; + +/* In memory LDM database structures. */ + +#define GUID_SIZE 16 + +struct privhead { /* Offsets and sizes are in sectors. */ + u16 ver_major; + u16 ver_minor; + u64 logical_disk_start; + u64 logical_disk_size; + u64 config_start; + u64 config_size; + u8 disk_id[GUID_SIZE]; +}; + +struct tocblock { /* We have exactly two bitmaps. */ + u8 bitmap1_name[16]; + u64 bitmap1_start; + u64 bitmap1_size; + u8 bitmap2_name[16]; + u64 bitmap2_start; + u64 bitmap2_size; +}; + +struct vmdb { /* VMDB: The database header */ + u16 ver_major; + u16 ver_minor; + u32 vblk_size; + u32 vblk_offset; + u32 last_vblk_seq; +}; + +struct vblk_comp { /* VBLK Component */ + u8 state[16]; + u64 parent_id; + u8 type; + u8 children; + u16 chunksize; +}; + +struct vblk_dgrp { /* VBLK Disk Group */ + u8 disk_id[64]; +}; + +struct vblk_disk { /* VBLK Disk */ + u8 disk_id[GUID_SIZE]; + u8 alt_name[128]; +}; + +struct vblk_part { /* VBLK Partition */ + u64 start; + u64 size; /* start, size and vol_off in sectors */ + u64 volume_offset; + u64 parent_id; + u64 disk_id; + u8 partnum; +}; + +struct vblk_volu { /* VBLK Volume */ + u8 volume_type[16]; + u8 volume_state[16]; + u8 guid[16]; + u8 drive_hint[4]; + u64 size; + u8 partition_type; +}; + +struct vblk_head { /* VBLK standard header */ + u32 group; + u16 rec; + u16 nrec; +}; + +struct vblk { /* Generalised VBLK */ + u8 name[64]; + u64 obj_id; + u32 sequence; + u8 flags; + u8 type; + union { + struct vblk_comp comp; + struct vblk_dgrp dgrp; + struct vblk_disk disk; + struct vblk_part part; + struct vblk_volu volu; + } vblk; + struct list_head list; +}; + +struct ldmdb { /* Cache of the database */ + struct privhead ph; + struct tocblock toc; + struct vmdb vm; + struct list_head v_dgrp; + struct list_head v_disk; + struct list_head v_volu; + struct list_head v_comp; + struct list_head v_part; +}; + +int ldm_partition (struct parsed_partitions *state, struct block_device *bdev); + +#endif /* _FS_PT_LDM_H_ */ + diff --git a/fs/partitions/mac.c b/fs/partitions/mac.c new file mode 100644 index 0000000..bb22cdd --- /dev/null +++ b/fs/partitions/mac.c @@ -0,0 +1,130 @@ +/* + * fs/partitions/mac.c + * + * Code extracted from drivers/block/genhd.c + * Copyright (C) 1991-1998 Linus Torvalds + * Re-organised Feb 1998 Russell King + */ + +#include <linux/config.h> +#include <linux/ctype.h> +#include "check.h" +#include "mac.h" + +#ifdef CONFIG_PPC_PMAC +extern void note_bootable_part(dev_t dev, int part, int goodness); +#endif + +/* + * Code to understand MacOS partition tables. + */ + +static inline void mac_fix_string(char *stg, int len) +{ + int i; + + for (i = len - 1; i >= 0 && stg[i] == ' '; i--) + stg[i] = 0; +} + +int mac_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int slot = 1; + Sector sect; + unsigned char *data; + int blk, blocks_in_map; + unsigned secsize; +#ifdef CONFIG_PPC_PMAC + int found_root = 0; + int found_root_goodness = 0; +#endif + struct mac_partition *part; + struct mac_driver_desc *md; + + /* Get 0th block and look at the first partition map entry. */ + md = (struct mac_driver_desc *) read_dev_sector(bdev, 0, §); + if (!md) + return -1; + if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) { + put_dev_sector(sect); + return 0; + } + secsize = be16_to_cpu(md->block_size); + put_dev_sector(sect); + data = read_dev_sector(bdev, secsize/512, §); + if (!data) + return -1; + part = (struct mac_partition *) (data + secsize%512); + if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) { + put_dev_sector(sect); + return 0; /* not a MacOS disk */ + } + printk(" [mac]"); + blocks_in_map = be32_to_cpu(part->map_count); + for (blk = 1; blk <= blocks_in_map; ++blk) { + int pos = blk * secsize; + put_dev_sector(sect); + data = read_dev_sector(bdev, pos/512, §); + if (!data) + return -1; + part = (struct mac_partition *) (data + pos%512); + if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) + break; + put_partition(state, slot, + be32_to_cpu(part->start_block) * (secsize/512), + be32_to_cpu(part->block_count) * (secsize/512)); + +#ifdef CONFIG_PPC_PMAC + /* + * If this is the first bootable partition, tell the + * setup code, in case it wants to make this the root. + */ + if (_machine == _MACH_Pmac) { + int goodness = 0; + + mac_fix_string(part->processor, 16); + mac_fix_string(part->name, 32); + mac_fix_string(part->type, 32); + + if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE) + && strcasecmp(part->processor, "powerpc") == 0) + goodness++; + + if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0 + || (strnicmp(part->type, "Linux", 5) == 0 + && strcasecmp(part->type, "Linux_swap") != 0)) { + int i, l; + + goodness++; + l = strlen(part->name); + if (strcmp(part->name, "/") == 0) + goodness++; + for (i = 0; i <= l - 4; ++i) { + if (strnicmp(part->name + i, "root", + 4) == 0) { + goodness += 2; + break; + } + } + if (strnicmp(part->name, "swap", 4) == 0) + goodness--; + } + + if (goodness > found_root_goodness) { + found_root = blk; + found_root_goodness = goodness; + } + } +#endif /* CONFIG_PPC_PMAC */ + + ++slot; + } +#ifdef CONFIG_PPC_PMAC + if (found_root_goodness) + note_bootable_part(bdev->bd_dev, found_root, found_root_goodness); +#endif + + put_dev_sector(sect); + printk("\n"); + return 1; +} diff --git a/fs/partitions/mac.h b/fs/partitions/mac.h new file mode 100644 index 0000000..bbf26e1 --- /dev/null +++ b/fs/partitions/mac.h @@ -0,0 +1,44 @@ +/* + * fs/partitions/mac.h + */ + +#define MAC_PARTITION_MAGIC 0x504d + +/* type field value for A/UX or other Unix partitions */ +#define APPLE_AUX_TYPE "Apple_UNIX_SVR2" + +struct mac_partition { + __be16 signature; /* expected to be MAC_PARTITION_MAGIC */ + __be16 res1; + __be32 map_count; /* # blocks in partition map */ + __be32 start_block; /* absolute starting block # of partition */ + __be32 block_count; /* number of blocks in partition */ + char name[32]; /* partition name */ + char type[32]; /* string type description */ + __be32 data_start; /* rel block # of first data block */ + __be32 data_count; /* number of data blocks */ + __be32 status; /* partition status bits */ + __be32 boot_start; + __be32 boot_size; + __be32 boot_load; + __be32 boot_load2; + __be32 boot_entry; + __be32 boot_entry2; + __be32 boot_cksum; + char processor[16]; /* identifies ISA of boot */ + /* there is more stuff after this that we don't need */ +}; + +#define MAC_STATUS_BOOTABLE 8 /* partition is bootable */ + +#define MAC_DRIVER_MAGIC 0x4552 + +/* Driver descriptor structure, in block 0 */ +struct mac_driver_desc { + __be16 signature; /* expected to be MAC_DRIVER_MAGIC */ + __be16 block_size; + __be32 block_count; + /* ... more stuff */ +}; + +int mac_partition(struct parsed_partitions *state, struct block_device *bdev); diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c new file mode 100644 index 0000000..17ee1b4 --- /dev/null +++ b/fs/partitions/msdos.c @@ -0,0 +1,479 @@ +/* + * fs/partitions/msdos.c + * + * Code extracted from drivers/block/genhd.c + * Copyright (C) 1991-1998 Linus Torvalds + * + * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug + * in the early extended-partition checks and added DM partitions + * + * Support for DiskManager v6.0x added by Mark Lord, + * with information provided by OnTrack. This now works for linux fdisk + * and LILO, as well as loadlin and bootln. Note that disks other than + * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1). + * + * More flexible handling of extended partitions - aeb, 950831 + * + * Check partition table on IDE disks for common CHS translations + * + * Re-organised Feb 1998 Russell King + */ + +#include <linux/config.h> + +#include "check.h" +#include "msdos.h" +#include "efi.h" + +/* + * Many architectures don't like unaligned accesses, while + * the nr_sects and start_sect partition table entries are + * at a 2 (mod 4) address. + */ +#include <asm/unaligned.h> + +#define SYS_IND(p) (get_unaligned(&p->sys_ind)) +#define NR_SECTS(p) ({ __typeof__(p->nr_sects) __a = \ + get_unaligned(&p->nr_sects); \ + le32_to_cpu(__a); \ + }) + +#define START_SECT(p) ({ __typeof__(p->start_sect) __a = \ + get_unaligned(&p->start_sect); \ + le32_to_cpu(__a); \ + }) + +static inline int is_extended_partition(struct partition *p) +{ + return (SYS_IND(p) == DOS_EXTENDED_PARTITION || + SYS_IND(p) == WIN98_EXTENDED_PARTITION || + SYS_IND(p) == LINUX_EXTENDED_PARTITION); +} + +#define MSDOS_LABEL_MAGIC1 0x55 +#define MSDOS_LABEL_MAGIC2 0xAA + +static inline int +msdos_magic_present(unsigned char *p) +{ + return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2); +} + +/* + * Create devices for each logical partition in an extended partition. + * The logical partitions form a linked list, with each entry being + * a partition table with two entries. The first entry + * is the real data partition (with a start relative to the partition + * table start). The second is a pointer to the next logical partition + * (with a start relative to the entire extended partition). + * We do not create a Linux partition for the partition tables, but + * only for the actual data partitions. + */ + +static void +parse_extended(struct parsed_partitions *state, struct block_device *bdev, + u32 first_sector, u32 first_size) +{ + struct partition *p; + Sector sect; + unsigned char *data; + u32 this_sector, this_size; + int sector_size = bdev_hardsect_size(bdev) / 512; + int loopct = 0; /* number of links followed + without finding a data partition */ + int i; + + this_sector = first_sector; + this_size = first_size; + + while (1) { + if (++loopct > 100) + return; + if (state->next == state->limit) + return; + data = read_dev_sector(bdev, this_sector, §); + if (!data) + return; + + if (!msdos_magic_present(data + 510)) + goto done; + + p = (struct partition *) (data + 0x1be); + + /* + * Usually, the first entry is the real data partition, + * the 2nd entry is the next extended partition, or empty, + * and the 3rd and 4th entries are unused. + * However, DRDOS sometimes has the extended partition as + * the first entry (when the data partition is empty), + * and OS/2 seems to use all four entries. + */ + + /* + * First process the data partition(s) + */ + for (i=0; i<4; i++, p++) { + u32 offs, size, next; + + if (SYS_IND(p) == 0) + continue; + if (!NR_SECTS(p) || is_extended_partition(p)) + continue; + + /* Check the 3rd and 4th entries - + these sometimes contain random garbage */ + offs = START_SECT(p)*sector_size; + size = NR_SECTS(p)*sector_size; + next = this_sector + offs; + if (i >= 2) { + if (offs + size > this_size) + continue; + if (next < first_sector) + continue; + if (next + size > first_sector + first_size) + continue; + } + + put_partition(state, state->next, next, size); + if (SYS_IND(p) == LINUX_RAID_PARTITION) + state->parts[state->next].flags = 1; + loopct = 0; + if (++state->next == state->limit) + goto done; + } + /* + * Next, process the (first) extended partition, if present. + * (So far, there seems to be no reason to make + * parse_extended() recursive and allow a tree + * of extended partitions.) + * It should be a link to the next logical partition. + */ + p -= 4; + for (i=0; i<4; i++, p++) + if (NR_SECTS(p) && is_extended_partition(p)) + break; + if (i == 4) + goto done; /* nothing left to do */ + + this_sector = first_sector + START_SECT(p) * sector_size; + this_size = NR_SECTS(p) * sector_size; + put_dev_sector(sect); + } +done: + put_dev_sector(sect); +} + +/* james@bpgc.com: Solaris has a nasty indicator: 0x82 which also + indicates linux swap. Be careful before believing this is Solaris. */ + +static void +parse_solaris_x86(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin) +{ +#ifdef CONFIG_SOLARIS_X86_PARTITION + Sector sect; + struct solaris_x86_vtoc *v; + int i; + + v = (struct solaris_x86_vtoc *)read_dev_sector(bdev, offset+1, §); + if (!v) + return; + if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) { + put_dev_sector(sect); + return; + } + printk(" %s%d: <solaris:", state->name, origin); + if (le32_to_cpu(v->v_version) != 1) { + printk(" cannot handle version %d vtoc>\n", + le32_to_cpu(v->v_version)); + put_dev_sector(sect); + return; + } + for (i=0; i<SOLARIS_X86_NUMSLICE && state->next<state->limit; i++) { + struct solaris_x86_slice *s = &v->v_slice[i]; + if (s->s_size == 0) + continue; + printk(" [s%d]", i); + /* solaris partitions are relative to current MS-DOS + * one; must add the offset of the current partition */ + put_partition(state, state->next++, + le32_to_cpu(s->s_start)+offset, + le32_to_cpu(s->s_size)); + } + put_dev_sector(sect); + printk(" >\n"); +#endif +} + +#if defined(CONFIG_BSD_DISKLABEL) || defined(CONFIG_NEC98_PARTITION) +/* + * Create devices for BSD partitions listed in a disklabel, under a + * dos-like partition. See parse_extended() for more information. + */ +void +parse_bsd(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin, char *flavour, + int max_partitions) +{ + Sector sect; + struct bsd_disklabel *l; + struct bsd_partition *p; + + l = (struct bsd_disklabel *)read_dev_sector(bdev, offset+1, §); + if (!l) + return; + if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) { + put_dev_sector(sect); + return; + } + printk(" %s%d: <%s:", state->name, origin, flavour); + + if (le16_to_cpu(l->d_npartitions) < max_partitions) + max_partitions = le16_to_cpu(l->d_npartitions); + for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) { + u32 bsd_start, bsd_size; + + if (state->next == state->limit) + break; + if (p->p_fstype == BSD_FS_UNUSED) + continue; + bsd_start = le32_to_cpu(p->p_offset); + bsd_size = le32_to_cpu(p->p_size); + if (offset == bsd_start && size == bsd_size) + /* full parent partition, we have it already */ + continue; + if (offset > bsd_start || offset+size < bsd_start+bsd_size) { + printk("bad subpartition - ignored\n"); + continue; + } + put_partition(state, state->next++, bsd_start, bsd_size); + } + put_dev_sector(sect); + if (le16_to_cpu(l->d_npartitions) > max_partitions) + printk(" (ignored %d more)", + le16_to_cpu(l->d_npartitions) - max_partitions); + printk(" >\n"); +} +#endif + +static void +parse_freebsd(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin) +{ +#ifdef CONFIG_BSD_DISKLABEL + parse_bsd(state, bdev, offset, size, origin, + "bsd", BSD_MAXPARTITIONS); +#endif +} + +static void +parse_netbsd(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin) +{ +#ifdef CONFIG_BSD_DISKLABEL + parse_bsd(state, bdev, offset, size, origin, + "netbsd", BSD_MAXPARTITIONS); +#endif +} + +static void +parse_openbsd(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin) +{ +#ifdef CONFIG_BSD_DISKLABEL + parse_bsd(state, bdev, offset, size, origin, + "openbsd", OPENBSD_MAXPARTITIONS); +#endif +} + +/* + * Create devices for Unixware partitions listed in a disklabel, under a + * dos-like partition. See parse_extended() for more information. + */ +static void +parse_unixware(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin) +{ +#ifdef CONFIG_UNIXWARE_DISKLABEL + Sector sect; + struct unixware_disklabel *l; + struct unixware_slice *p; + + l = (struct unixware_disklabel *)read_dev_sector(bdev, offset+29, §); + if (!l) + return; + if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC || + le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_DISKMAGIC2) { + put_dev_sector(sect); + return; + } + printk(" %s%d: <unixware:", state->name, origin); + p = &l->vtoc.v_slice[1]; + /* I omit the 0th slice as it is the same as whole disk. */ + while (p - &l->vtoc.v_slice[0] < UNIXWARE_NUMSLICE) { + if (state->next == state->limit) + break; + + if (p->s_label != UNIXWARE_FS_UNUSED) + put_partition(state, state->next++, + START_SECT(p), NR_SECTS(p)); + p++; + } + put_dev_sector(sect); + printk(" >\n"); +#endif +} + +/* + * Minix 2.0.0/2.0.2 subpartition support. + * Anand Krishnamurthy <anandk@wiproge.med.ge.com> + * Rajeev V. Pillai <rajeevvp@yahoo.com> + */ +static void +parse_minix(struct parsed_partitions *state, struct block_device *bdev, + u32 offset, u32 size, int origin) +{ +#ifdef CONFIG_MINIX_SUBPARTITION + Sector sect; + unsigned char *data; + struct partition *p; + int i; + + data = read_dev_sector(bdev, offset, §); + if (!data) + return; + + p = (struct partition *)(data + 0x1be); + + /* The first sector of a Minix partition can have either + * a secondary MBR describing its subpartitions, or + * the normal boot sector. */ + if (msdos_magic_present (data + 510) && + SYS_IND(p) == MINIX_PARTITION) { /* subpartition table present */ + + printk(" %s%d: <minix:", state->name, origin); + for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) { + if (state->next == state->limit) + break; + /* add each partition in use */ + if (SYS_IND(p) == MINIX_PARTITION) + put_partition(state, state->next++, + START_SECT(p), NR_SECTS(p)); + } + printk(" >\n"); + } + put_dev_sector(sect); +#endif /* CONFIG_MINIX_SUBPARTITION */ +} + +static struct { + unsigned char id; + void (*parse)(struct parsed_partitions *, struct block_device *, + u32, u32, int); +} subtypes[] = { + {FREEBSD_PARTITION, parse_freebsd}, + {NETBSD_PARTITION, parse_netbsd}, + {OPENBSD_PARTITION, parse_openbsd}, + {MINIX_PARTITION, parse_minix}, + {UNIXWARE_PARTITION, parse_unixware}, + {SOLARIS_X86_PARTITION, parse_solaris_x86}, + {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86}, + {0, NULL}, +}; + +int msdos_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int sector_size = bdev_hardsect_size(bdev) / 512; + Sector sect; + unsigned char *data; + struct partition *p; + int slot; + + data = read_dev_sector(bdev, 0, §); + if (!data) + return -1; + if (!msdos_magic_present(data + 510)) { + put_dev_sector(sect); + return 0; + } + + /* + * Now that the 55aa signature is present, this is probably + * either the boot sector of a FAT filesystem or a DOS-type + * partition table. Reject this in case the boot indicator + * is not 0 or 0x80. + */ + p = (struct partition *) (data + 0x1be); + for (slot = 1; slot <= 4; slot++, p++) { + if (p->boot_ind != 0 && p->boot_ind != 0x80) { + put_dev_sector(sect); + return 0; + } + } + +#ifdef CONFIG_EFI_PARTITION + p = (struct partition *) (data + 0x1be); + for (slot = 1 ; slot <= 4 ; slot++, p++) { + /* If this is an EFI GPT disk, msdos should ignore it. */ + if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) { + put_dev_sector(sect); + return 0; + } + } +#endif + p = (struct partition *) (data + 0x1be); + + /* + * Look for partitions in two passes: + * First find the primary and DOS-type extended partitions. + * On the second pass look inside *BSD, Unixware and Solaris partitions. + */ + + state->next = 5; + for (slot = 1 ; slot <= 4 ; slot++, p++) { + u32 start = START_SECT(p)*sector_size; + u32 size = NR_SECTS(p)*sector_size; + if (SYS_IND(p) == 0) + continue; + if (!size) + continue; + if (is_extended_partition(p)) { + /* prevent someone doing mkfs or mkswap on an + extended partition, but leave room for LILO */ + put_partition(state, slot, start, size == 1 ? 1 : 2); + printk(" <"); + parse_extended(state, bdev, start, size); + printk(" >"); + continue; + } + put_partition(state, slot, start, size); + if (SYS_IND(p) == LINUX_RAID_PARTITION) + state->parts[slot].flags = 1; + if (SYS_IND(p) == DM6_PARTITION) + printk("[DM]"); + if (SYS_IND(p) == EZD_PARTITION) + printk("[EZD]"); + } + + printk("\n"); + + /* second pass - output for each on a separate line */ + p = (struct partition *) (0x1be + data); + for (slot = 1 ; slot <= 4 ; slot++, p++) { + unsigned char id = SYS_IND(p); + int n; + + if (!NR_SECTS(p)) + continue; + + for (n = 0; subtypes[n].parse && id != subtypes[n].id; n++) + ; + + if (!subtypes[n].parse) + continue; + subtypes[n].parse(state, bdev, START_SECT(p)*sector_size, + NR_SECTS(p)*sector_size, slot); + } + put_dev_sector(sect); + return 1; +} diff --git a/fs/partitions/msdos.h b/fs/partitions/msdos.h new file mode 100644 index 0000000..01e5e0b --- /dev/null +++ b/fs/partitions/msdos.h @@ -0,0 +1,8 @@ +/* + * fs/partitions/msdos.h + */ + +#define MSDOS_LABEL_MAGIC 0xAA55 + +int msdos_partition(struct parsed_partitions *state, struct block_device *bdev); + diff --git a/fs/partitions/osf.c b/fs/partitions/osf.c new file mode 100644 index 0000000..c05c17bc --- /dev/null +++ b/fs/partitions/osf.c @@ -0,0 +1,78 @@ +/* + * fs/partitions/osf.c + * + * Code extracted from drivers/block/genhd.c + * + * Copyright (C) 1991-1998 Linus Torvalds + * Re-organised Feb 1998 Russell King + */ + +#include "check.h" +#include "osf.h" + +int osf_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int i; + int slot = 1; + Sector sect; + unsigned char *data; + struct disklabel { + __le32 d_magic; + __le16 d_type,d_subtype; + u8 d_typename[16]; + u8 d_packname[16]; + __le32 d_secsize; + __le32 d_nsectors; + __le32 d_ntracks; + __le32 d_ncylinders; + __le32 d_secpercyl; + __le32 d_secprtunit; + __le16 d_sparespertrack; + __le16 d_sparespercyl; + __le32 d_acylinders; + __le16 d_rpm, d_interleave, d_trackskew, d_cylskew; + __le32 d_headswitch, d_trkseek, d_flags; + __le32 d_drivedata[5]; + __le32 d_spare[5]; + __le32 d_magic2; + __le16 d_checksum; + __le16 d_npartitions; + __le32 d_bbsize, d_sbsize; + struct d_partition { + __le32 p_size; + __le32 p_offset; + __le32 p_fsize; + u8 p_fstype; + u8 p_frag; + __le16 p_cpg; + } d_partitions[8]; + } * label; + struct d_partition * partition; + + data = read_dev_sector(bdev, 0, §); + if (!data) + return -1; + + label = (struct disklabel *) (data+64); + partition = label->d_partitions; + if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) { + put_dev_sector(sect); + return 0; + } + if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) { + put_dev_sector(sect); + return 0; + } + for (i = 0 ; i < le16_to_cpu(label->d_npartitions); i++, partition++) { + if (slot == state->limit) + break; + if (le32_to_cpu(partition->p_size)) + put_partition(state, slot, + le32_to_cpu(partition->p_offset), + le32_to_cpu(partition->p_size)); + slot++; + } + printk("\n"); + put_dev_sector(sect); + return 1; +} diff --git a/fs/partitions/osf.h b/fs/partitions/osf.h new file mode 100644 index 0000000..427b8ea --- /dev/null +++ b/fs/partitions/osf.h @@ -0,0 +1,7 @@ +/* + * fs/partitions/osf.h + */ + +#define DISKLABELMAGIC (0x82564557UL) + +int osf_partition(struct parsed_partitions *state, struct block_device *bdev); diff --git a/fs/partitions/sgi.c b/fs/partitions/sgi.c new file mode 100644 index 0000000..6fa4ff8 --- /dev/null +++ b/fs/partitions/sgi.c @@ -0,0 +1,82 @@ +/* + * fs/partitions/sgi.c + * + * Code extracted from drivers/block/genhd.c + */ + +#include "check.h" +#include "sgi.h" + +struct sgi_disklabel { + __be32 magic_mushroom; /* Big fat spliff... */ + __be16 root_part_num; /* Root partition number */ + __be16 swap_part_num; /* Swap partition number */ + s8 boot_file[16]; /* Name of boot file for ARCS */ + u8 _unused0[48]; /* Device parameter useless crapola.. */ + struct sgi_volume { + s8 name[8]; /* Name of volume */ + __be32 block_num; /* Logical block number */ + __be32 num_bytes; /* How big, in bytes */ + } volume[15]; + struct sgi_partition { + __be32 num_blocks; /* Size in logical blocks */ + __be32 first_block; /* First logical block */ + __be32 type; /* Type of this partition */ + } partitions[16]; + __be32 csum; /* Disk label checksum */ + __be32 _unused1; /* Padding */ +}; + +int sgi_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int i, csum; + __be32 magic; + int slot = 1; + unsigned int start, blocks; + __be32 *ui, cs; + Sector sect; + struct sgi_disklabel *label; + struct sgi_partition *p; + char b[BDEVNAME_SIZE]; + + label = (struct sgi_disklabel *) read_dev_sector(bdev, 0, §); + if (!label) + return -1; + p = &label->partitions[0]; + magic = label->magic_mushroom; + if(be32_to_cpu(magic) != SGI_LABEL_MAGIC) { + /*printk("Dev %s SGI disklabel: bad magic %08x\n", + bdevname(bdev, b), be32_to_cpu(magic));*/ + put_dev_sector(sect); + return 0; + } + ui = ((__be32 *) (label + 1)) - 1; + for(csum = 0; ui >= ((__be32 *) label);) { + cs = *ui--; + csum += be32_to_cpu(cs); + } + if(csum) { + printk(KERN_WARNING "Dev %s SGI disklabel: csum bad, label corrupted\n", + bdevname(bdev, b)); + put_dev_sector(sect); + return 0; + } + /* All SGI disk labels have 16 partitions, disks under Linux only + * have 15 minor's. Luckily there are always a few zero length + * partitions which we don't care about so we never overflow the + * current_minor. + */ + for(i = 0; i < 16; i++, p++) { + blocks = be32_to_cpu(p->num_blocks); + start = be32_to_cpu(p->first_block); + if (blocks) { + put_partition(state, slot, start, blocks); + if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION) + state->parts[slot].flags = 1; + } + slot++; + } + printk("\n"); + put_dev_sector(sect); + return 1; +} diff --git a/fs/partitions/sgi.h b/fs/partitions/sgi.h new file mode 100644 index 0000000..5d5595c --- /dev/null +++ b/fs/partitions/sgi.h @@ -0,0 +1,8 @@ +/* + * fs/partitions/sgi.h + */ + +extern int sgi_partition(struct parsed_partitions *state, struct block_device *bdev); + +#define SGI_LABEL_MAGIC 0x0be5a941 + diff --git a/fs/partitions/sun.c b/fs/partitions/sun.c new file mode 100644 index 0000000..abe91ca --- /dev/null +++ b/fs/partitions/sun.c @@ -0,0 +1,91 @@ +/* + * fs/partitions/sun.c + * + * Code extracted from drivers/block/genhd.c + * + * Copyright (C) 1991-1998 Linus Torvalds + * Re-organised Feb 1998 Russell King + */ + +#include "check.h" +#include "sun.h" + +int sun_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int i; + __be16 csum; + int slot = 1; + __be16 *ush; + Sector sect; + struct sun_disklabel { + unsigned char info[128]; /* Informative text string */ + unsigned char spare0[14]; + struct sun_info { + unsigned char spare1; + unsigned char id; + unsigned char spare2; + unsigned char flags; + } infos[8]; + unsigned char spare[246]; /* Boot information etc. */ + __be16 rspeed; /* Disk rotational speed */ + __be16 pcylcount; /* Physical cylinder count */ + __be16 sparecyl; /* extra sects per cylinder */ + unsigned char spare2[4]; /* More magic... */ + __be16 ilfact; /* Interleave factor */ + __be16 ncyl; /* Data cylinder count */ + __be16 nacyl; /* Alt. cylinder count */ + __be16 ntrks; /* Tracks per cylinder */ + __be16 nsect; /* Sectors per track */ + unsigned char spare3[4]; /* Even more magic... */ + struct sun_partition { + __be32 start_cylinder; + __be32 num_sectors; + } partitions[8]; + __be16 magic; /* Magic number */ + __be16 csum; /* Label xor'd checksum */ + } * label; + struct sun_partition *p; + unsigned long spc; + char b[BDEVNAME_SIZE]; + + label = (struct sun_disklabel *)read_dev_sector(bdev, 0, §); + if (!label) + return -1; + + p = label->partitions; + if (be16_to_cpu(label->magic) != SUN_LABEL_MAGIC) { +/* printk(KERN_INFO "Dev %s Sun disklabel: bad magic %04x\n", + bdevname(bdev, b), be16_to_cpu(label->magic)); */ + put_dev_sector(sect); + return 0; + } + /* Look at the checksum */ + ush = ((__be16 *) (label+1)) - 1; + for (csum = 0; ush >= ((__be16 *) label);) + csum ^= *ush--; + if (csum) { + printk("Dev %s Sun disklabel: Csum bad, label corrupted\n", + bdevname(bdev, b)); + put_dev_sector(sect); + return 0; + } + + /* All Sun disks have 8 partition entries */ + spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect); + for (i = 0; i < 8; i++, p++) { + unsigned long st_sector; + int num_sectors; + + st_sector = be32_to_cpu(p->start_cylinder) * spc; + num_sectors = be32_to_cpu(p->num_sectors); + if (num_sectors) { + put_partition(state, slot, st_sector, num_sectors); + if (label->infos[i].id == LINUX_RAID_PARTITION) + state->parts[slot].flags = 1; + } + slot++; + } + printk("\n"); + put_dev_sector(sect); + return 1; +} diff --git a/fs/partitions/sun.h b/fs/partitions/sun.h new file mode 100644 index 0000000..b1b19fd --- /dev/null +++ b/fs/partitions/sun.h @@ -0,0 +1,7 @@ +/* + * fs/partitions/sun.h + */ + +#define SUN_LABEL_MAGIC 0xDABE + +int sun_partition(struct parsed_partitions *state, struct block_device *bdev); diff --git a/fs/partitions/ultrix.c b/fs/partitions/ultrix.c new file mode 100644 index 0000000..8a8d4d9 --- /dev/null +++ b/fs/partitions/ultrix.c @@ -0,0 +1,47 @@ +/* + * fs/partitions/ultrix.c + * + * Code extracted from drivers/block/genhd.c + * + * Re-organised Jul 1999 Russell King + */ + +#include "check.h" + +int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev) +{ + int i; + Sector sect; + unsigned char *data; + struct ultrix_disklabel { + s32 pt_magic; /* magic no. indicating part. info exits */ + s32 pt_valid; /* set by driver if pt is current */ + struct pt_info { + s32 pi_nblocks; /* no. of sectors */ + u32 pi_blkoff; /* block offset for start */ + } pt_part[8]; + } *label; + +#define PT_MAGIC 0x032957 /* Partition magic number */ +#define PT_VALID 1 /* Indicates if struct is valid */ + + data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, §); + if (!data) + return -1; + + label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label)); + + if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) { + for (i=0; i<8; i++) + if (label->pt_part[i].pi_nblocks) + put_partition(state, i+1, + label->pt_part[i].pi_blkoff, + label->pt_part[i].pi_nblocks); + put_dev_sector(sect); + printk ("\n"); + return 1; + } else { + put_dev_sector(sect); + return 0; + } +} diff --git a/fs/partitions/ultrix.h b/fs/partitions/ultrix.h new file mode 100644 index 0000000..a74bf8e --- /dev/null +++ b/fs/partitions/ultrix.h @@ -0,0 +1,5 @@ +/* + * fs/partitions/ultrix.h + */ + +int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev); 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