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-rw-r--r--block/partitions/Kconfig270
-rw-r--r--block/partitions/Makefile22
-rw-r--r--block/partitions/acorn.c550
-rw-r--r--block/partitions/aix.c298
-rw-r--r--block/partitions/amiga.c207
-rw-r--r--block/partitions/atari.c157
-rw-r--r--block/partitions/atari.h36
-rw-r--r--block/partitions/check.h70
-rw-r--r--block/partitions/cmdline.c156
-rw-r--r--block/partitions/core.c802
-rw-r--r--block/partitions/efi.c747
-rw-r--r--block/partitions/efi.h116
-rw-r--r--block/partitions/ibm.c375
-rw-r--r--block/partitions/karma.c60
-rw-r--r--block/partitions/ldm.c1498
-rw-r--r--block/partitions/ldm.h194
-rw-r--r--block/partitions/mac.c143
-rw-r--r--block/partitions/mac.h44
-rw-r--r--block/partitions/msdos.c715
-rw-r--r--block/partitions/osf.c87
-rw-r--r--block/partitions/sgi.c88
-rw-r--r--block/partitions/sun.c130
-rw-r--r--block/partitions/sysv68.c95
-rw-r--r--block/partitions/ultrix.c48
24 files changed, 6908 insertions, 0 deletions
diff --git a/block/partitions/Kconfig b/block/partitions/Kconfig
new file mode 100644
index 000000000..6e2a64966
--- /dev/null
+++ b/block/partitions/Kconfig
@@ -0,0 +1,270 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# 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
+ default y if ARCH_ACORN
+ depends on ACORN_PARTITION
+ 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
+ default y if ARCH_ACORN
+ depends on ACORN_PARTITION
+
+config ACORN_PARTITION_ICS
+ bool "ICS partition support" if PARTITION_ADVANCED
+ default y if ARCH_ACORN
+ depends on ACORN_PARTITION
+ 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
+ default y if ARCH_ACORN
+ depends on ACORN_PARTITION
+ 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
+ default y if ARCH_ACORN
+ depends on ACORN_PARTITION
+ 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
+ default y if ARCH_ACORN
+ depends on ACORN_PARTITION
+ 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 AIX_PARTITION
+ bool "AIX basic partition table support" if PARTITION_ADVANCED
+ help
+ Say Y here if you would like to be able to read the hard disk
+ partition table format used by IBM or Motorola PowerPC machines
+ running AIX. AIX actually uses a Logical Volume Manager, where
+ "logical volumes" can be spread across one or multiple disks,
+ but this driver works only for the simple case of partitions which
+ are contiguous.
+ Otherwise, say N.
+
+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 && 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 || PPC_PMAC)
+ 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/XP's or Vista's Logical Disk
+ Manager. They are also known as "Dynamic Disks".
+
+ Note this driver only supports Dynamic Disks with a protective MBR
+ label, i.e. DOS partition table. It does not support GPT labelled
+ Dynamic Disks yet as can be created with Vista.
+
+ 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, XP,
+ and Vista.
+
+ For a fuller description read <file:Documentation/admin-guide/ldm.rst>.
+
+ 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 DEFAULT_SGI_PARTITION
+ 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 (SPARC || 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 KARMA_PARTITION
+ bool "Karma Partition support"
+ depends on PARTITION_ADVANCED
+ help
+ Say Y here if you would like to mount the Rio Karma MP3 player, as it
+ uses a proprietary partition table.
+
+config EFI_PARTITION
+ bool "EFI GUID Partition support" if PARTITION_ADVANCED
+ default y
+ select CRC32
+ help
+ Say Y here if you would like to use hard disks under Linux which
+ were partitioned using EFI GPT.
+
+config SYSV68_PARTITION
+ bool "SYSV68 partition table support" if PARTITION_ADVANCED
+ default y if VME
+ help
+ Say Y here if you would like to be able to read the hard disk
+ partition table format used by Motorola Delta machines (using
+ sysv68).
+ Otherwise, say N.
+
+config CMDLINE_PARTITION
+ bool "Command line partition support" if PARTITION_ADVANCED
+ select BLK_CMDLINE_PARSER
+ help
+ Say Y here if you want to read the partition table from bootargs.
+ The format for the command line is just like mtdparts.
diff --git a/block/partitions/Makefile b/block/partitions/Makefile
new file mode 100644
index 000000000..a7f05cdb0
--- /dev/null
+++ b/block/partitions/Makefile
@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the linux kernel.
+#
+
+obj-$(CONFIG_BLOCK) += core.o
+obj-$(CONFIG_ACORN_PARTITION) += acorn.o
+obj-$(CONFIG_AMIGA_PARTITION) += amiga.o
+obj-$(CONFIG_ATARI_PARTITION) += atari.o
+obj-$(CONFIG_AIX_PARTITION) += aix.o
+obj-$(CONFIG_CMDLINE_PARTITION) += cmdline.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_KARMA_PARTITION) += karma.o
+obj-$(CONFIG_SYSV68_PARTITION) += sysv68.o
diff --git a/block/partitions/acorn.c b/block/partitions/acorn.c
new file mode 100644
index 000000000..c64c57b95
--- /dev/null
+++ b/block/partitions/acorn.c
@@ -0,0 +1,550 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 1996-2000 Russell King.
+ *
+ * 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/buffer_head.h>
+#include <linux/adfs_fs.h>
+
+#include "check.h"
+
+/*
+ * Partition types. (Oh for reusability)
+ */
+#define PARTITION_RISCIX_MFM 1
+#define PARTITION_RISCIX_SCSI 2
+#define PARTITION_LINUX 9
+
+#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
+ defined(CONFIG_ACORN_PARTITION_ADFS)
+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) {
+ strlcat(state->pp_buf, " [", PAGE_SIZE);
+ strlcat(state->pp_buf, name, PAGE_SIZE);
+ strlcat(state->pp_buf, "]", PAGE_SIZE);
+ }
+ put_partition(state, slot, first_sector, nr_sects);
+ return dr;
+}
+#endif
+
+#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];
+};
+
+#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
+ defined(CONFIG_ACORN_PARTITION_ADFS)
+static int riscix_partition(struct parsed_partitions *state,
+ unsigned long first_sect, int slot,
+ unsigned long nr_sects)
+{
+ Sector sect;
+ struct riscix_record *rr;
+
+ rr = read_part_sector(state, first_sect, &sect);
+ if (!rr)
+ return -1;
+
+ strlcat(state->pp_buf, " [RISCiX]", PAGE_SIZE);
+
+
+ if (rr->magic == RISCIX_MAGIC) {
+ unsigned long size = nr_sects > 2 ? 2 : nr_sects;
+ int part;
+
+ strlcat(state->pp_buf, " <", PAGE_SIZE);
+
+ 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));
+ strlcat(state->pp_buf, "(", PAGE_SIZE);
+ strlcat(state->pp_buf, rr->part[part].name, PAGE_SIZE);
+ strlcat(state->pp_buf, ")", PAGE_SIZE);
+ }
+ }
+
+ strlcat(state->pp_buf, " >\n", PAGE_SIZE);
+ } else {
+ put_partition(state, slot++, first_sect, nr_sects);
+ }
+
+ put_dev_sector(sect);
+ return slot;
+}
+#endif
+#endif
+
+#define LINUX_NATIVE_MAGIC 0xdeafa1de
+#define LINUX_SWAP_MAGIC 0xdeafab1e
+
+struct linux_part {
+ __le32 magic;
+ __le32 start_sect;
+ __le32 nr_sects;
+};
+
+#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
+ defined(CONFIG_ACORN_PARTITION_ADFS)
+static int linux_partition(struct parsed_partitions *state,
+ 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;
+
+ strlcat(state->pp_buf, " [Linux]", PAGE_SIZE);
+
+ put_partition(state, slot++, first_sect, size);
+
+ linuxp = read_part_sector(state, first_sect, &sect);
+ if (!linuxp)
+ return -1;
+
+ strlcat(state->pp_buf, " <", PAGE_SIZE);
+ 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 ++;
+ }
+ strlcat(state->pp_buf, " >", PAGE_SIZE);
+
+ put_dev_sector(sect);
+ return slot;
+}
+#endif
+
+#ifdef CONFIG_ACORN_PARTITION_CUMANA
+int adfspart_check_CUMANA(struct parsed_partitions *state)
+{
+ 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_part_sector(state, start_blk * 2 + 6, &sect);
+ 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, first_sector, slot,
+ nr_sects);
+ break;
+#endif
+
+ case PARTITION_LINUX:
+ slot = linux_partition(state, 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)
+{
+ 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_part_sector(state, 6, &sect);
+ 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);
+
+ /*
+ * Work out start of non-adfs partition.
+ */
+ nr_sects = (state->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, start_sect, slot,
+ nr_sects);
+ break;
+#endif
+
+ case PARTITION_LINUX:
+ slot = linux_partition(state, start_sect, slot,
+ nr_sects);
+ break;
+ }
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
+#endif
+
+#ifdef CONFIG_ACORN_PARTITION_ICS
+
+struct ics_part {
+ __le32 start;
+ __le32 size;
+};
+
+static int adfspart_check_ICSLinux(struct parsed_partitions *state,
+ unsigned long block)
+{
+ Sector sect;
+ unsigned char *data = read_part_sector(state, block, &sect);
+ 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)
+{
+ const unsigned char *data;
+ const struct ics_part *p;
+ int slot;
+ Sector sect;
+
+ /*
+ * Try ICS style partitions - sector 0 contains partition info.
+ */
+ data = read_part_sector(state, 0, &sect);
+ if (!data)
+ return -1;
+
+ if (!valid_ics_sector(data)) {
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ strlcat(state->pp_buf, " [ICS]", PAGE_SIZE);
+
+ 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(state, start)) {
+ start += 1;
+ size -= 1;
+ }
+ }
+
+ if (size)
+ put_partition(state, slot++, start, size);
+ }
+
+ put_dev_sector(sect);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ 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)
+{
+ Sector sect;
+ const unsigned char *data;
+ const struct ptec_part *p;
+ int slot = 1;
+ int i;
+
+ data = read_part_sector(state, 0, &sect);
+ if (!data)
+ return -1;
+
+ if (!valid_ptec_sector(data)) {
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ strlcat(state->pp_buf, " [POWERTEC]", PAGE_SIZE);
+
+ 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);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ 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)
+{
+ Sector sect;
+ const unsigned char *data;
+ unsigned char buffer[256];
+ struct eesox_part *p;
+ sector_t start = 0;
+ int i, slot = 1;
+
+ data = read_part_sector(state, 7, &sect);
+ 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(state->bdev->bd_disk);
+ put_partition(state, slot++, start, size - start);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ }
+
+ return i ? 1 : 0;
+}
+#endif
diff --git a/block/partitions/aix.c b/block/partitions/aix.c
new file mode 100644
index 000000000..c7b4fd1a4
--- /dev/null
+++ b/block/partitions/aix.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/partitions/aix.c
+ *
+ * Copyright (C) 2012-2013 Philippe De Muyter <phdm@macqel.be>
+ */
+
+#include "check.h"
+
+struct lvm_rec {
+ char lvm_id[4]; /* "_LVM" */
+ char reserved4[16];
+ __be32 lvmarea_len;
+ __be32 vgda_len;
+ __be32 vgda_psn[2];
+ char reserved36[10];
+ __be16 pp_size; /* log2(pp_size) */
+ char reserved46[12];
+ __be16 version;
+ };
+
+struct vgda {
+ __be32 secs;
+ __be32 usec;
+ char reserved8[16];
+ __be16 numlvs;
+ __be16 maxlvs;
+ __be16 pp_size;
+ __be16 numpvs;
+ __be16 total_vgdas;
+ __be16 vgda_size;
+ };
+
+struct lvd {
+ __be16 lv_ix;
+ __be16 res2;
+ __be16 res4;
+ __be16 maxsize;
+ __be16 lv_state;
+ __be16 mirror;
+ __be16 mirror_policy;
+ __be16 num_lps;
+ __be16 res10[8];
+ };
+
+struct lvname {
+ char name[64];
+ };
+
+struct ppe {
+ __be16 lv_ix;
+ unsigned short res2;
+ unsigned short res4;
+ __be16 lp_ix;
+ unsigned short res8[12];
+ };
+
+struct pvd {
+ char reserved0[16];
+ __be16 pp_count;
+ char reserved18[2];
+ __be32 psn_part1;
+ char reserved24[8];
+ struct ppe ppe[1016];
+ };
+
+#define LVM_MAXLVS 256
+
+/**
+ * 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;
+}
+
+/**
+ * read_lba(): Read bytes from disk, starting at given LBA
+ * @state
+ * @lba
+ * @buffer
+ * @count
+ *
+ * Description: Reads @count bytes from @state->bdev into @buffer.
+ * Returns number of bytes read on success, 0 on error.
+ */
+static size_t read_lba(struct parsed_partitions *state, u64 lba, u8 *buffer,
+ size_t count)
+{
+ size_t totalreadcount = 0;
+
+ if (!buffer || lba + count / 512 > last_lba(state->bdev))
+ return 0;
+
+ while (count) {
+ int copied = 512;
+ Sector sect;
+ unsigned char *data = read_part_sector(state, lba++, &sect);
+ 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_pvd(): reads physical volume descriptor
+ * @state
+ * @lba
+ *
+ * Description: Returns pvd on success, NULL on error.
+ * Allocates space for pvd and fill it with disk blocks at @lba
+ * Notes: remember to free pvd when you're done!
+ */
+static struct pvd *alloc_pvd(struct parsed_partitions *state, u32 lba)
+{
+ size_t count = sizeof(struct pvd);
+ struct pvd *p;
+
+ p = kmalloc(count, GFP_KERNEL);
+ if (!p)
+ return NULL;
+
+ if (read_lba(state, lba, (u8 *) p, count) < count) {
+ kfree(p);
+ return NULL;
+ }
+ return p;
+}
+
+/**
+ * alloc_lvn(): reads logical volume names
+ * @state
+ * @lba
+ *
+ * Description: Returns lvn on success, NULL on error.
+ * Allocates space for lvn and fill it with disk blocks at @lba
+ * Notes: remember to free lvn when you're done!
+ */
+static struct lvname *alloc_lvn(struct parsed_partitions *state, u32 lba)
+{
+ size_t count = sizeof(struct lvname) * LVM_MAXLVS;
+ struct lvname *p;
+
+ p = kmalloc(count, GFP_KERNEL);
+ if (!p)
+ return NULL;
+
+ if (read_lba(state, lba, (u8 *) p, count) < count) {
+ kfree(p);
+ return NULL;
+ }
+ return p;
+}
+
+int aix_partition(struct parsed_partitions *state)
+{
+ int ret = 0;
+ Sector sect;
+ unsigned char *d;
+ u32 pp_bytes_size;
+ u32 pp_blocks_size = 0;
+ u32 vgda_sector = 0;
+ u32 vgda_len = 0;
+ int numlvs = 0;
+ struct pvd *pvd = NULL;
+ struct lv_info {
+ unsigned short pps_per_lv;
+ unsigned short pps_found;
+ unsigned char lv_is_contiguous;
+ } *lvip;
+ struct lvname *n = NULL;
+
+ d = read_part_sector(state, 7, &sect);
+ if (d) {
+ struct lvm_rec *p = (struct lvm_rec *)d;
+ u16 lvm_version = be16_to_cpu(p->version);
+ char tmp[64];
+
+ if (lvm_version == 1) {
+ int pp_size_log2 = be16_to_cpu(p->pp_size);
+
+ pp_bytes_size = 1 << pp_size_log2;
+ pp_blocks_size = pp_bytes_size / 512;
+ snprintf(tmp, sizeof(tmp),
+ " AIX LVM header version %u found\n",
+ lvm_version);
+ vgda_len = be32_to_cpu(p->vgda_len);
+ vgda_sector = be32_to_cpu(p->vgda_psn[0]);
+ } else {
+ snprintf(tmp, sizeof(tmp),
+ " unsupported AIX LVM version %d found\n",
+ lvm_version);
+ }
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ put_dev_sector(sect);
+ }
+ if (vgda_sector && (d = read_part_sector(state, vgda_sector, &sect))) {
+ struct vgda *p = (struct vgda *)d;
+
+ numlvs = be16_to_cpu(p->numlvs);
+ put_dev_sector(sect);
+ }
+ lvip = kcalloc(state->limit, sizeof(struct lv_info), GFP_KERNEL);
+ if (!lvip)
+ return 0;
+ if (numlvs && (d = read_part_sector(state, vgda_sector + 1, &sect))) {
+ struct lvd *p = (struct lvd *)d;
+ int i;
+
+ n = alloc_lvn(state, vgda_sector + vgda_len - 33);
+ if (n) {
+ int foundlvs = 0;
+
+ for (i = 0; foundlvs < numlvs && i < state->limit; i += 1) {
+ lvip[i].pps_per_lv = be16_to_cpu(p[i].num_lps);
+ if (lvip[i].pps_per_lv)
+ foundlvs += 1;
+ }
+ /* pvd loops depend on n[].name and lvip[].pps_per_lv */
+ pvd = alloc_pvd(state, vgda_sector + 17);
+ }
+ put_dev_sector(sect);
+ }
+ if (pvd) {
+ int numpps = be16_to_cpu(pvd->pp_count);
+ int psn_part1 = be32_to_cpu(pvd->psn_part1);
+ int i;
+ int cur_lv_ix = -1;
+ int next_lp_ix = 1;
+ int lp_ix;
+
+ for (i = 0; i < numpps; i += 1) {
+ struct ppe *p = pvd->ppe + i;
+ unsigned int lv_ix;
+
+ lp_ix = be16_to_cpu(p->lp_ix);
+ if (!lp_ix) {
+ next_lp_ix = 1;
+ continue;
+ }
+ lv_ix = be16_to_cpu(p->lv_ix) - 1;
+ if (lv_ix >= state->limit) {
+ cur_lv_ix = -1;
+ continue;
+ }
+ lvip[lv_ix].pps_found += 1;
+ if (lp_ix == 1) {
+ cur_lv_ix = lv_ix;
+ next_lp_ix = 1;
+ } else if (lv_ix != cur_lv_ix || lp_ix != next_lp_ix) {
+ next_lp_ix = 1;
+ continue;
+ }
+ if (lp_ix == lvip[lv_ix].pps_per_lv) {
+ char tmp[70];
+
+ put_partition(state, lv_ix + 1,
+ (i + 1 - lp_ix) * pp_blocks_size + psn_part1,
+ lvip[lv_ix].pps_per_lv * pp_blocks_size);
+ snprintf(tmp, sizeof(tmp), " <%s>\n",
+ n[lv_ix].name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ lvip[lv_ix].lv_is_contiguous = 1;
+ ret = 1;
+ next_lp_ix = 1;
+ } else
+ next_lp_ix += 1;
+ }
+ for (i = 0; i < state->limit; i += 1)
+ if (lvip[i].pps_found && !lvip[i].lv_is_contiguous) {
+ char tmp[sizeof(n[i].name) + 1]; // null char
+
+ snprintf(tmp, sizeof(tmp), "%s", n[i].name);
+ pr_warn("partition %s (%u pp's found) is "
+ "not contiguous\n",
+ tmp, lvip[i].pps_found);
+ }
+ kfree(pvd);
+ }
+ kfree(n);
+ kfree(lvip);
+ return ret;
+}
diff --git a/block/partitions/amiga.c b/block/partitions/amiga.c
new file mode 100644
index 000000000..a99ec7f1a
--- /dev/null
+++ b/block/partitions/amiga.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/partitions/amiga.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ *
+ * Copyright (C) 1991-1998 Linus Torvalds
+ * Re-organised Feb 1998 Russell King
+ */
+
+#define pr_fmt(fmt) fmt
+
+#include <linux/types.h>
+#include <linux/mm_types.h>
+#include <linux/overflow.h>
+#include <linux/affs_hardblocks.h>
+
+#include "check.h"
+
+/* magic offsets in partition DosEnvVec */
+#define NR_HD 3
+#define NR_SECT 5
+#define LO_CYL 9
+#define HI_CYL 10
+
+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)
+{
+ Sector sect;
+ unsigned char *data;
+ struct RigidDiskBlock *rdb;
+ struct PartitionBlock *pb;
+ u64 start_sect, nr_sects;
+ sector_t blk, end_sect;
+ u32 cylblk; /* rdb_CylBlocks = nr_heads*sect_per_track */
+ u32 nr_hd, nr_sect, lo_cyl, hi_cyl;
+ int part, res = 0;
+ unsigned 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_part_sector(state, blk, &sect);
+ if (!data) {
+ pr_err("Dev %s: unable to read RDB block %llu\n",
+ bdevname(state->bdev, b), blk);
+ res = -1;
+ 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) {
+ pr_err("Trashed word at 0xd0 in block %llu ignored in checksum calculation\n",
+ blk);
+ break;
+ }
+
+ pr_err("Dev %s: RDB in block %llu has bad checksum\n",
+ bdevname(state->bdev, b), blk);
+ }
+
+ /* blksize is blocks per 512 byte standard block */
+ blksize = be32_to_cpu( rdb->rdb_BlockBytes ) / 512;
+
+ {
+ char tmp[7 + 10 + 1 + 1];
+
+ /* Be more informative */
+ snprintf(tmp, sizeof(tmp), " RDSK (%d)", blksize * 512);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ }
+ blk = be32_to_cpu(rdb->rdb_PartitionList);
+ put_dev_sector(sect);
+ for (part = 1; (s32) blk>0 && part<=16; part++, put_dev_sector(sect)) {
+ /* Read in terms partition table understands */
+ if (check_mul_overflow(blk, (sector_t) blksize, &blk)) {
+ pr_err("Dev %s: overflow calculating partition block %llu! Skipping partitions %u and beyond\n",
+ bdevname(state->bdev, b), blk, part);
+ break;
+ }
+ data = read_part_sector(state, blk, &sect);
+ if (!data) {
+ pr_err("Dev %s: unable to read partition block %llu\n",
+ bdevname(state->bdev, b), blk);
+ res = -1;
+ 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;
+
+ /* RDB gives us more than enough rope to hang ourselves with,
+ * many times over (2^128 bytes if all fields max out).
+ * Some careful checks are in order, so check for potential
+ * overflows.
+ * We are multiplying four 32 bit numbers to one sector_t!
+ */
+
+ nr_hd = be32_to_cpu(pb->pb_Environment[NR_HD]);
+ nr_sect = be32_to_cpu(pb->pb_Environment[NR_SECT]);
+
+ /* CylBlocks is total number of blocks per cylinder */
+ if (check_mul_overflow(nr_hd, nr_sect, &cylblk)) {
+ pr_err("Dev %s: heads*sects %u overflows u32, skipping partition!\n",
+ bdevname(state->bdev, b), cylblk);
+ continue;
+ }
+
+ /* check for consistency with RDB defined CylBlocks */
+ if (cylblk > be32_to_cpu(rdb->rdb_CylBlocks)) {
+ pr_warn("Dev %s: cylblk %u > rdb_CylBlocks %u!\n",
+ bdevname(state->bdev, b), cylblk,
+ be32_to_cpu(rdb->rdb_CylBlocks));
+ }
+
+ /* RDB allows for variable logical block size -
+ * normalize to 512 byte blocks and check result.
+ */
+
+ if (check_mul_overflow(cylblk, blksize, &cylblk)) {
+ pr_err("Dev %s: partition %u bytes per cyl. overflows u32, skipping partition!\n",
+ bdevname(state->bdev, b), part);
+ continue;
+ }
+
+ /* Calculate partition start and end. Limit of 32 bit on cylblk
+ * guarantees no overflow occurs if LBD support is enabled.
+ */
+
+ lo_cyl = be32_to_cpu(pb->pb_Environment[LO_CYL]);
+ start_sect = ((u64) lo_cyl * cylblk);
+
+ hi_cyl = be32_to_cpu(pb->pb_Environment[HI_CYL]);
+ nr_sects = (((u64) hi_cyl - lo_cyl + 1) * cylblk);
+
+ if (!nr_sects)
+ continue;
+
+ /* Warn user if partition end overflows u32 (AmigaDOS limit) */
+
+ if ((start_sect + nr_sects) > UINT_MAX) {
+ pr_warn("Dev %s: partition %u (%llu-%llu) needs 64 bit device support!\n",
+ bdevname(state->bdev, b), part,
+ start_sect, start_sect + nr_sects);
+ }
+
+ if (check_add_overflow(start_sect, nr_sects, &end_sect)) {
+ pr_err("Dev %s: partition %u (%llu-%llu) needs LBD device support, skipping partition!\n",
+ bdevname(state->bdev, b), part,
+ start_sect, end_sect);
+ continue;
+ }
+
+ /* Tell Kernel about it */
+
+ put_partition(state,slot++,start_sect,nr_sects);
+ {
+ /* Be even more informative to aid mounting */
+ char dostype[4];
+ char tmp[42];
+
+ __be32 *dt = (__be32 *)dostype;
+ *dt = pb->pb_Environment[16];
+ if (dostype[3] < ' ')
+ snprintf(tmp, sizeof(tmp), " (%c%c%c^%c)",
+ dostype[0], dostype[1],
+ dostype[2], dostype[3] + '@' );
+ else
+ snprintf(tmp, sizeof(tmp), " (%c%c%c%c)",
+ dostype[0], dostype[1],
+ dostype[2], dostype[3]);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ snprintf(tmp, sizeof(tmp), "(res %d spb %d)",
+ be32_to_cpu(pb->pb_Environment[6]),
+ be32_to_cpu(pb->pb_Environment[4]));
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ }
+ res = 1;
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+rdb_done:
+ return res;
+}
diff --git a/block/partitions/atari.c b/block/partitions/atari.c
new file mode 100644
index 000000000..2305840c8
--- /dev/null
+++ b/block/partitions/atari.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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)
+{
+ 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
+
+ /*
+ * ATARI partition scheme supports 512 lba only. If this is not
+ * the case, bail early to avoid miscalculating hd_size.
+ */
+ if (bdev_logical_block_size(state->bdev) != 512)
+ return 0;
+
+ rs = read_part_sector(state, 0, &sect);
+ if (!rs)
+ return -1;
+
+ /* Verify this is an Atari rootsector: */
+ hd_size = state->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];
+ strlcat(state->pp_buf, " AHDI", PAGE_SIZE);
+ 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
+ strlcat(state->pp_buf, " XGM<", PAGE_SIZE);
+ partsect = extensect = be32_to_cpu(pi->st);
+ while (1) {
+ xrs = read_part_sector(state, partsect, &sect2);
+ if (!xrs) {
+ printk (" block %ld read failed\n", partsect);
+ put_dev_sector(sect);
+ return -1;
+ }
+
+ /* ++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;
+ }
+ }
+ strlcat(state->pp_buf, " >", PAGE_SIZE);
+ }
+#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)) {
+ strlcat(state->pp_buf, " ICD<", PAGE_SIZE);
+ 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));
+ }
+ strlcat(state->pp_buf, " >", PAGE_SIZE);
+ }
+ }
+#endif
+ put_dev_sector(sect);
+
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+ return 1;
+}
diff --git a/block/partitions/atari.h b/block/partitions/atari.h
new file mode 100644
index 000000000..678202442
--- /dev/null
+++ b/block/partitions/atari.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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)
+ */
+
+#include <linux/compiler.h>
+
+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 */
+} __packed;
+
diff --git a/block/partitions/check.h b/block/partitions/check.h
new file mode 100644
index 000000000..c577e9ee6
--- /dev/null
+++ b/block/partitions/check.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/pagemap.h>
+#include <linux/blkdev.h>
+#include <linux/genhd.h>
+#include "../blk.h"
+
+/*
+ * add_gd_partition adds a partitions details to the devices partition
+ * description.
+ */
+struct parsed_partitions {
+ struct block_device *bdev;
+ char name[BDEVNAME_SIZE];
+ struct {
+ sector_t from;
+ sector_t size;
+ int flags;
+ bool has_info;
+ struct partition_meta_info info;
+ } *parts;
+ int next;
+ int limit;
+ bool access_beyond_eod;
+ char *pp_buf;
+};
+
+typedef struct {
+ struct page *v;
+} Sector;
+
+void *read_part_sector(struct parsed_partitions *state, sector_t n, Sector *p);
+static inline void put_dev_sector(Sector p)
+{
+ put_page(p.v);
+}
+
+static inline void
+put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
+{
+ if (n < p->limit) {
+ char tmp[1 + BDEVNAME_SIZE + 10 + 1];
+
+ p->parts[n].from = from;
+ p->parts[n].size = size;
+ snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
+ strlcat(p->pp_buf, tmp, PAGE_SIZE);
+ }
+}
+
+/* detection routines go here in alphabetical order: */
+int adfspart_check_ADFS(struct parsed_partitions *state);
+int adfspart_check_CUMANA(struct parsed_partitions *state);
+int adfspart_check_EESOX(struct parsed_partitions *state);
+int adfspart_check_ICS(struct parsed_partitions *state);
+int adfspart_check_POWERTEC(struct parsed_partitions *state);
+int aix_partition(struct parsed_partitions *state);
+int amiga_partition(struct parsed_partitions *state);
+int atari_partition(struct parsed_partitions *state);
+int cmdline_partition(struct parsed_partitions *state);
+int efi_partition(struct parsed_partitions *state);
+int ibm_partition(struct parsed_partitions *);
+int karma_partition(struct parsed_partitions *state);
+int ldm_partition(struct parsed_partitions *state);
+int mac_partition(struct parsed_partitions *state);
+int msdos_partition(struct parsed_partitions *state);
+int osf_partition(struct parsed_partitions *state);
+int sgi_partition(struct parsed_partitions *state);
+int sun_partition(struct parsed_partitions *state);
+int sysv68_partition(struct parsed_partitions *state);
+int ultrix_partition(struct parsed_partitions *state);
diff --git a/block/partitions/cmdline.c b/block/partitions/cmdline.c
new file mode 100644
index 000000000..8f545c36c
--- /dev/null
+++ b/block/partitions/cmdline.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2013 HUAWEI
+ * Author: Cai Zhiyong <caizhiyong@huawei.com>
+ *
+ * Read block device partition table from the command line.
+ * Typically used for fixed block (eMMC) embedded devices.
+ * It has no MBR, so saves storage space. Bootloader can be easily accessed
+ * by absolute address of data on the block device.
+ * Users can easily change the partition.
+ *
+ * The format for the command line is just like mtdparts.
+ *
+ * For further information, see "Documentation/block/cmdline-partition.rst"
+ *
+ */
+
+#include <linux/cmdline-parser.h>
+
+#include "check.h"
+
+static char *cmdline;
+static struct cmdline_parts *bdev_parts;
+
+static int add_part(int slot, struct cmdline_subpart *subpart, void *param)
+{
+ int label_min;
+ struct partition_meta_info *info;
+ char tmp[sizeof(info->volname) + 4];
+ struct parsed_partitions *state = (struct parsed_partitions *)param;
+
+ if (slot >= state->limit)
+ return 1;
+
+ put_partition(state, slot, subpart->from >> 9,
+ subpart->size >> 9);
+
+ info = &state->parts[slot].info;
+
+ label_min = min_t(int, sizeof(info->volname) - 1,
+ sizeof(subpart->name));
+ strncpy(info->volname, subpart->name, label_min);
+ info->volname[label_min] = '\0';
+
+ snprintf(tmp, sizeof(tmp), "(%s)", info->volname);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+
+ state->parts[slot].has_info = true;
+
+ return 0;
+}
+
+static int __init cmdline_parts_setup(char *s)
+{
+ cmdline = s;
+ return 1;
+}
+__setup("blkdevparts=", cmdline_parts_setup);
+
+static bool has_overlaps(sector_t from, sector_t size,
+ sector_t from2, sector_t size2)
+{
+ sector_t end = from + size;
+ sector_t end2 = from2 + size2;
+
+ if (from >= from2 && from < end2)
+ return true;
+
+ if (end > from2 && end <= end2)
+ return true;
+
+ if (from2 >= from && from2 < end)
+ return true;
+
+ if (end2 > from && end2 <= end)
+ return true;
+
+ return false;
+}
+
+static inline void overlaps_warns_header(void)
+{
+ pr_warn("Overlapping partitions are used in command line partitions.");
+ pr_warn("Don't use filesystems on overlapping partitions:");
+}
+
+static void cmdline_parts_verifier(int slot, struct parsed_partitions *state)
+{
+ int i;
+ bool header = true;
+
+ for (; slot < state->limit && state->parts[slot].has_info; slot++) {
+ for (i = slot+1; i < state->limit && state->parts[i].has_info;
+ i++) {
+ if (has_overlaps(state->parts[slot].from,
+ state->parts[slot].size,
+ state->parts[i].from,
+ state->parts[i].size)) {
+ if (header) {
+ header = false;
+ overlaps_warns_header();
+ }
+ pr_warn("%s[%llu,%llu] overlaps with "
+ "%s[%llu,%llu].",
+ state->parts[slot].info.volname,
+ (u64)state->parts[slot].from << 9,
+ (u64)state->parts[slot].size << 9,
+ state->parts[i].info.volname,
+ (u64)state->parts[i].from << 9,
+ (u64)state->parts[i].size << 9);
+ }
+ }
+ }
+}
+
+/*
+ * Purpose: allocate cmdline partitions.
+ * Returns:
+ * -1 if unable to read the partition table
+ * 0 if this isn't our partition table
+ * 1 if successful
+ */
+int cmdline_partition(struct parsed_partitions *state)
+{
+ sector_t disk_size;
+ char bdev[BDEVNAME_SIZE];
+ struct cmdline_parts *parts;
+
+ if (cmdline) {
+ if (bdev_parts)
+ cmdline_parts_free(&bdev_parts);
+
+ if (cmdline_parts_parse(&bdev_parts, cmdline)) {
+ cmdline = NULL;
+ return -1;
+ }
+ cmdline = NULL;
+ }
+
+ if (!bdev_parts)
+ return 0;
+
+ bdevname(state->bdev, bdev);
+ parts = cmdline_parts_find(bdev_parts, bdev);
+ if (!parts)
+ return 0;
+
+ disk_size = get_capacity(state->bdev->bd_disk) << 9;
+
+ cmdline_parts_set(parts, disk_size, 1, add_part, (void *)state);
+ cmdline_parts_verifier(1, state);
+
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+ return 1;
+}
diff --git a/block/partitions/core.c b/block/partitions/core.c
new file mode 100644
index 000000000..e3d61ec4a
--- /dev/null
+++ b/block/partitions/core.c
@@ -0,0 +1,802 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 1991-1998 Linus Torvalds
+ * Re-organised Feb 1998 Russell King
+ */
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <linux/genhd.h>
+#include <linux/vmalloc.h>
+#include <linux/blktrace_api.h>
+#include <linux/raid/detect.h>
+#include "check.h"
+
+static int (*check_part[])(struct parsed_partitions *) = {
+ /*
+ * 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_CMDLINE_PARTITION
+ cmdline_partition,
+#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_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
+#ifdef CONFIG_KARMA_PARTITION
+ karma_partition,
+#endif
+#ifdef CONFIG_SYSV68_PARTITION
+ sysv68_partition,
+#endif
+ NULL
+};
+
+static struct parsed_partitions *allocate_partitions(struct gendisk *hd)
+{
+ struct parsed_partitions *state;
+ int nr;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ nr = disk_max_parts(hd);
+ state->parts = vzalloc(array_size(nr, sizeof(state->parts[0])));
+ if (!state->parts) {
+ kfree(state);
+ return NULL;
+ }
+
+ state->limit = nr;
+
+ return state;
+}
+
+static void free_partitions(struct parsed_partitions *state)
+{
+ vfree(state->parts);
+ kfree(state);
+}
+
+static struct parsed_partitions *check_partition(struct gendisk *hd,
+ struct block_device *bdev)
+{
+ struct parsed_partitions *state;
+ int i, res, err;
+
+ state = allocate_partitions(hd);
+ if (!state)
+ return NULL;
+ state->pp_buf = (char *)__get_free_page(GFP_KERNEL);
+ if (!state->pp_buf) {
+ free_partitions(state);
+ return NULL;
+ }
+ state->pp_buf[0] = '\0';
+
+ state->bdev = bdev;
+ disk_name(hd, 0, state->name);
+ snprintf(state->pp_buf, PAGE_SIZE, " %s:", state->name);
+ if (isdigit(state->name[strlen(state->name)-1]))
+ sprintf(state->name, "p");
+
+ i = res = err = 0;
+ while (!res && check_part[i]) {
+ memset(state->parts, 0, state->limit * sizeof(state->parts[0]));
+ res = check_part[i++](state);
+ if (res < 0) {
+ /*
+ * We have hit an I/O error which we don't report now.
+ * But record it, and let the others do their job.
+ */
+ err = res;
+ res = 0;
+ }
+
+ }
+ if (res > 0) {
+ printk(KERN_INFO "%s", state->pp_buf);
+
+ free_page((unsigned long)state->pp_buf);
+ return state;
+ }
+ if (state->access_beyond_eod)
+ err = -ENOSPC;
+ /*
+ * The partition is unrecognized. So report I/O errors if there were any
+ */
+ if (err)
+ res = err;
+ if (res) {
+ strlcat(state->pp_buf,
+ " unable to read partition table\n", PAGE_SIZE);
+ printk(KERN_INFO "%s", state->pp_buf);
+ }
+
+ free_page((unsigned long)state->pp_buf);
+ free_partitions(state);
+ return ERR_PTR(res);
+}
+
+static ssize_t part_partition_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ return sprintf(buf, "%d\n", p->partno);
+}
+
+static ssize_t part_start_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
+}
+
+static ssize_t part_ro_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+ return sprintf(buf, "%d\n", p->policy ? 1 : 0);
+}
+
+static ssize_t part_alignment_offset_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ return sprintf(buf, "%u\n",
+ queue_limit_alignment_offset(&part_to_disk(p)->queue->limits,
+ p->start_sect));
+}
+
+static ssize_t part_discard_alignment_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ return sprintf(buf, "%u\n",
+ queue_limit_discard_alignment(&part_to_disk(p)->queue->limits,
+ p->start_sect));
+}
+
+static DEVICE_ATTR(partition, 0444, part_partition_show, NULL);
+static DEVICE_ATTR(start, 0444, part_start_show, NULL);
+static DEVICE_ATTR(size, 0444, part_size_show, NULL);
+static DEVICE_ATTR(ro, 0444, part_ro_show, NULL);
+static DEVICE_ATTR(alignment_offset, 0444, part_alignment_offset_show, NULL);
+static DEVICE_ATTR(discard_alignment, 0444, part_discard_alignment_show, NULL);
+static DEVICE_ATTR(stat, 0444, part_stat_show, NULL);
+static DEVICE_ATTR(inflight, 0444, part_inflight_show, NULL);
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+static struct device_attribute dev_attr_fail =
+ __ATTR(make-it-fail, 0644, part_fail_show, part_fail_store);
+#endif
+
+static struct attribute *part_attrs[] = {
+ &dev_attr_partition.attr,
+ &dev_attr_start.attr,
+ &dev_attr_size.attr,
+ &dev_attr_ro.attr,
+ &dev_attr_alignment_offset.attr,
+ &dev_attr_discard_alignment.attr,
+ &dev_attr_stat.attr,
+ &dev_attr_inflight.attr,
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+ &dev_attr_fail.attr,
+#endif
+ NULL
+};
+
+static struct attribute_group part_attr_group = {
+ .attrs = part_attrs,
+};
+
+static const struct attribute_group *part_attr_groups[] = {
+ &part_attr_group,
+#ifdef CONFIG_BLK_DEV_IO_TRACE
+ &blk_trace_attr_group,
+#endif
+ NULL
+};
+
+static void part_release(struct device *dev)
+{
+ struct hd_struct *p = dev_to_part(dev);
+ blk_free_devt(dev->devt);
+ hd_free_part(p);
+ kfree(p);
+}
+
+static int part_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct hd_struct *part = dev_to_part(dev);
+
+ add_uevent_var(env, "PARTN=%u", part->partno);
+ if (part->info && part->info->volname[0])
+ add_uevent_var(env, "PARTNAME=%s", part->info->volname);
+ return 0;
+}
+
+struct device_type part_type = {
+ .name = "partition",
+ .groups = part_attr_groups,
+ .release = part_release,
+ .uevent = part_uevent,
+};
+
+static void hd_struct_free_work(struct work_struct *work)
+{
+ struct hd_struct *part =
+ container_of(to_rcu_work(work), struct hd_struct, rcu_work);
+ struct gendisk *disk = part_to_disk(part);
+
+ /*
+ * Release the disk reference acquired in delete_partition here.
+ * We can't release it in hd_struct_free because the final put_device
+ * needs process context and thus can't be run directly from a
+ * percpu_ref ->release handler.
+ */
+ put_device(disk_to_dev(disk));
+
+ part->start_sect = 0;
+ part->nr_sects = 0;
+ part_stat_set_all(part, 0);
+ put_device(part_to_dev(part));
+}
+
+static void hd_struct_free(struct percpu_ref *ref)
+{
+ struct hd_struct *part = container_of(ref, struct hd_struct, ref);
+ struct gendisk *disk = part_to_disk(part);
+ struct disk_part_tbl *ptbl =
+ rcu_dereference_protected(disk->part_tbl, 1);
+
+ rcu_assign_pointer(ptbl->last_lookup, NULL);
+
+ INIT_RCU_WORK(&part->rcu_work, hd_struct_free_work);
+ queue_rcu_work(system_wq, &part->rcu_work);
+}
+
+int hd_ref_init(struct hd_struct *part)
+{
+ if (percpu_ref_init(&part->ref, hd_struct_free, 0, GFP_KERNEL))
+ return -ENOMEM;
+ return 0;
+}
+
+/*
+ * Must be called either with bd_mutex held, before a disk can be opened or
+ * after all disk users are gone.
+ */
+void delete_partition(struct hd_struct *part)
+{
+ struct gendisk *disk = part_to_disk(part);
+ struct disk_part_tbl *ptbl =
+ rcu_dereference_protected(disk->part_tbl, 1);
+ struct block_device *bdev;
+
+ /*
+ * ->part_tbl is referenced in this part's release handler, so
+ * we have to hold the disk device
+ */
+ get_device(disk_to_dev(disk));
+ rcu_assign_pointer(ptbl->part[part->partno], NULL);
+ kobject_put(part->holder_dir);
+ device_del(part_to_dev(part));
+
+ /*
+ * Remove gendisk pointer from idr so that it cannot be looked up
+ * while RCU period before freeing gendisk is running to prevent
+ * use-after-free issues. Note that the device number stays
+ * "in-use" until we really free the gendisk.
+ */
+ blk_invalidate_devt(part_devt(part));
+
+ bdev = bdget_part(part);
+ if (bdev) {
+ remove_inode_hash(bdev->bd_inode);
+ bdput(bdev);
+ }
+ percpu_ref_kill(&part->ref);
+}
+
+static ssize_t whole_disk_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return 0;
+}
+static DEVICE_ATTR(whole_disk, 0444, whole_disk_show, NULL);
+
+/*
+ * Must be called either with bd_mutex held, before a disk can be opened or
+ * after all disk users are gone.
+ */
+static struct hd_struct *add_partition(struct gendisk *disk, int partno,
+ sector_t start, sector_t len, int flags,
+ struct partition_meta_info *info)
+{
+ struct hd_struct *p;
+ dev_t devt = MKDEV(0, 0);
+ struct device *ddev = disk_to_dev(disk);
+ struct device *pdev;
+ struct disk_part_tbl *ptbl;
+ const char *dname;
+ int err;
+
+ /*
+ * Partitions are not supported on zoned block devices that are used as
+ * such.
+ */
+ switch (disk->queue->limits.zoned) {
+ case BLK_ZONED_HM:
+ pr_warn("%s: partitions not supported on host managed zoned block device\n",
+ disk->disk_name);
+ return ERR_PTR(-ENXIO);
+ case BLK_ZONED_HA:
+ pr_info("%s: disabling host aware zoned block device support due to partitions\n",
+ disk->disk_name);
+ disk->queue->limits.zoned = BLK_ZONED_NONE;
+ break;
+ case BLK_ZONED_NONE:
+ break;
+ }
+
+ err = disk_expand_part_tbl(disk, partno);
+ if (err)
+ return ERR_PTR(err);
+ ptbl = rcu_dereference_protected(disk->part_tbl, 1);
+
+ if (ptbl->part[partno])
+ return ERR_PTR(-EBUSY);
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return ERR_PTR(-EBUSY);
+
+ p->dkstats = alloc_percpu(struct disk_stats);
+ if (!p->dkstats) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ hd_sects_seq_init(p);
+ pdev = part_to_dev(p);
+
+ p->start_sect = start;
+ p->nr_sects = len;
+ p->partno = partno;
+ p->policy = get_disk_ro(disk);
+
+ if (info) {
+ struct partition_meta_info *pinfo;
+
+ pinfo = kzalloc_node(sizeof(*pinfo), GFP_KERNEL, disk->node_id);
+ if (!pinfo) {
+ err = -ENOMEM;
+ goto out_free_stats;
+ }
+ memcpy(pinfo, info, sizeof(*info));
+ p->info = pinfo;
+ }
+
+ dname = dev_name(ddev);
+ if (isdigit(dname[strlen(dname) - 1]))
+ dev_set_name(pdev, "%sp%d", dname, partno);
+ else
+ dev_set_name(pdev, "%s%d", dname, partno);
+
+ device_initialize(pdev);
+ pdev->class = &block_class;
+ pdev->type = &part_type;
+ pdev->parent = ddev;
+
+ err = blk_alloc_devt(p, &devt);
+ if (err)
+ goto out_free_info;
+ pdev->devt = devt;
+
+ /* delay uevent until 'holders' subdir is created */
+ dev_set_uevent_suppress(pdev, 1);
+ err = device_add(pdev);
+ if (err)
+ goto out_put;
+
+ err = -ENOMEM;
+ p->holder_dir = kobject_create_and_add("holders", &pdev->kobj);
+ if (!p->holder_dir)
+ goto out_del;
+
+ dev_set_uevent_suppress(pdev, 0);
+ if (flags & ADDPART_FLAG_WHOLEDISK) {
+ err = device_create_file(pdev, &dev_attr_whole_disk);
+ if (err)
+ goto out_del;
+ }
+
+ err = hd_ref_init(p);
+ if (err) {
+ if (flags & ADDPART_FLAG_WHOLEDISK)
+ goto out_remove_file;
+ goto out_del;
+ }
+
+ /* everything is up and running, commence */
+ rcu_assign_pointer(ptbl->part[partno], p);
+
+ /* suppress uevent if the disk suppresses it */
+ if (!dev_get_uevent_suppress(ddev))
+ kobject_uevent(&pdev->kobj, KOBJ_ADD);
+ return p;
+
+out_free_info:
+ kfree(p->info);
+out_free_stats:
+ free_percpu(p->dkstats);
+out_free:
+ kfree(p);
+ return ERR_PTR(err);
+out_remove_file:
+ device_remove_file(pdev, &dev_attr_whole_disk);
+out_del:
+ kobject_put(p->holder_dir);
+ device_del(pdev);
+out_put:
+ put_device(pdev);
+ return ERR_PTR(err);
+}
+
+static bool partition_overlaps(struct gendisk *disk, sector_t start,
+ sector_t length, int skip_partno)
+{
+ struct disk_part_iter piter;
+ struct hd_struct *part;
+ bool overlap = false;
+
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
+ while ((part = disk_part_iter_next(&piter))) {
+ if (part->partno == skip_partno ||
+ start >= part->start_sect + part->nr_sects ||
+ start + length <= part->start_sect)
+ continue;
+ overlap = true;
+ break;
+ }
+
+ disk_part_iter_exit(&piter);
+ return overlap;
+}
+
+int bdev_add_partition(struct block_device *bdev, int partno,
+ sector_t start, sector_t length)
+{
+ struct hd_struct *part;
+
+ mutex_lock(&bdev->bd_mutex);
+ if (partition_overlaps(bdev->bd_disk, start, length, -1)) {
+ mutex_unlock(&bdev->bd_mutex);
+ return -EBUSY;
+ }
+
+ part = add_partition(bdev->bd_disk, partno, start, length,
+ ADDPART_FLAG_NONE, NULL);
+ mutex_unlock(&bdev->bd_mutex);
+ return PTR_ERR_OR_ZERO(part);
+}
+
+int bdev_del_partition(struct block_device *bdev, int partno)
+{
+ struct block_device *bdevp;
+ struct hd_struct *part = NULL;
+ int ret;
+
+ bdevp = bdget_disk(bdev->bd_disk, partno);
+ if (!bdevp)
+ return -ENXIO;
+
+ mutex_lock(&bdevp->bd_mutex);
+ mutex_lock_nested(&bdev->bd_mutex, 1);
+
+ ret = -ENXIO;
+ part = disk_get_part(bdev->bd_disk, partno);
+ if (!part)
+ goto out_unlock;
+
+ ret = -EBUSY;
+ if (bdevp->bd_openers)
+ goto out_unlock;
+
+ sync_blockdev(bdevp);
+ invalidate_bdev(bdevp);
+
+ delete_partition(part);
+ ret = 0;
+out_unlock:
+ mutex_unlock(&bdev->bd_mutex);
+ mutex_unlock(&bdevp->bd_mutex);
+ bdput(bdevp);
+ if (part)
+ disk_put_part(part);
+ return ret;
+}
+
+int bdev_resize_partition(struct block_device *bdev, int partno,
+ sector_t start, sector_t length)
+{
+ struct block_device *bdevp;
+ struct hd_struct *part;
+ int ret = 0;
+
+ part = disk_get_part(bdev->bd_disk, partno);
+ if (!part)
+ return -ENXIO;
+
+ ret = -ENOMEM;
+ bdevp = bdget_part(part);
+ if (!bdevp)
+ goto out_put_part;
+
+ mutex_lock(&bdevp->bd_mutex);
+ mutex_lock_nested(&bdev->bd_mutex, 1);
+
+ ret = -EINVAL;
+ if (start != part->start_sect)
+ goto out_unlock;
+
+ ret = -EBUSY;
+ if (partition_overlaps(bdev->bd_disk, start, length, partno))
+ goto out_unlock;
+
+ part_nr_sects_write(part, length);
+ bd_set_nr_sectors(bdevp, length);
+
+ ret = 0;
+out_unlock:
+ mutex_unlock(&bdevp->bd_mutex);
+ mutex_unlock(&bdev->bd_mutex);
+ bdput(bdevp);
+out_put_part:
+ disk_put_part(part);
+ return ret;
+}
+
+static bool disk_unlock_native_capacity(struct gendisk *disk)
+{
+ const struct block_device_operations *bdops = disk->fops;
+
+ if (bdops->unlock_native_capacity &&
+ !(disk->flags & GENHD_FL_NATIVE_CAPACITY)) {
+ printk(KERN_CONT "enabling native capacity\n");
+ bdops->unlock_native_capacity(disk);
+ disk->flags |= GENHD_FL_NATIVE_CAPACITY;
+ return true;
+ } else {
+ printk(KERN_CONT "truncated\n");
+ return false;
+ }
+}
+
+int blk_drop_partitions(struct block_device *bdev)
+{
+ struct disk_part_iter piter;
+ struct hd_struct *part;
+
+ if (bdev->bd_part_count)
+ return -EBUSY;
+
+ sync_blockdev(bdev);
+ invalidate_bdev(bdev);
+
+ disk_part_iter_init(&piter, bdev->bd_disk, DISK_PITER_INCL_EMPTY);
+ while ((part = disk_part_iter_next(&piter)))
+ delete_partition(part);
+ disk_part_iter_exit(&piter);
+
+ return 0;
+}
+#ifdef CONFIG_S390
+/* for historic reasons in the DASD driver */
+EXPORT_SYMBOL_GPL(blk_drop_partitions);
+#endif
+
+static bool blk_add_partition(struct gendisk *disk, struct block_device *bdev,
+ struct parsed_partitions *state, int p)
+{
+ sector_t size = state->parts[p].size;
+ sector_t from = state->parts[p].from;
+ struct hd_struct *part;
+
+ if (!size)
+ return true;
+
+ if (from >= get_capacity(disk)) {
+ printk(KERN_WARNING
+ "%s: p%d start %llu is beyond EOD, ",
+ disk->disk_name, p, (unsigned long long) from);
+ if (disk_unlock_native_capacity(disk))
+ return false;
+ return true;
+ }
+
+ if (from + size > get_capacity(disk)) {
+ printk(KERN_WARNING
+ "%s: p%d size %llu extends beyond EOD, ",
+ disk->disk_name, p, (unsigned long long) size);
+
+ if (disk_unlock_native_capacity(disk))
+ return false;
+
+ /*
+ * We can not ignore partitions of broken tables created by for
+ * example camera firmware, but we limit them to the end of the
+ * disk to avoid creating invalid block devices.
+ */
+ size = get_capacity(disk) - from;
+ }
+
+ part = add_partition(disk, p, from, size, state->parts[p].flags,
+ &state->parts[p].info);
+ if (IS_ERR(part) && PTR_ERR(part) != -ENXIO) {
+ printk(KERN_ERR " %s: p%d could not be added: %ld\n",
+ disk->disk_name, p, -PTR_ERR(part));
+ return true;
+ }
+
+ if (IS_BUILTIN(CONFIG_BLK_DEV_MD) &&
+ (state->parts[p].flags & ADDPART_FLAG_RAID))
+ md_autodetect_dev(part_to_dev(part)->devt);
+
+ return true;
+}
+
+int blk_add_partitions(struct gendisk *disk, struct block_device *bdev)
+{
+ struct parsed_partitions *state;
+ int ret = -EAGAIN, p, highest;
+
+ if (!disk_part_scan_enabled(disk))
+ return 0;
+
+ state = check_partition(disk, bdev);
+ if (!state)
+ return 0;
+ if (IS_ERR(state)) {
+ /*
+ * I/O error reading the partition table. If we tried to read
+ * beyond EOD, retry after unlocking the native capacity.
+ */
+ if (PTR_ERR(state) == -ENOSPC) {
+ printk(KERN_WARNING "%s: partition table beyond EOD, ",
+ disk->disk_name);
+ if (disk_unlock_native_capacity(disk))
+ return -EAGAIN;
+ }
+ return -EIO;
+ }
+
+ /*
+ * Partitions are not supported on host managed zoned block devices.
+ */
+ if (disk->queue->limits.zoned == BLK_ZONED_HM) {
+ pr_warn("%s: ignoring partition table on host managed zoned block device\n",
+ disk->disk_name);
+ ret = 0;
+ goto out_free_state;
+ }
+
+ /*
+ * If we read beyond EOD, try unlocking native capacity even if the
+ * partition table was successfully read as we could be missing some
+ * partitions.
+ */
+ if (state->access_beyond_eod) {
+ printk(KERN_WARNING
+ "%s: partition table partially beyond EOD, ",
+ disk->disk_name);
+ if (disk_unlock_native_capacity(disk))
+ goto out_free_state;
+ }
+
+ /* tell userspace that the media / partition table may have changed */
+ kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
+
+ /*
+ * Detect the highest partition number and preallocate disk->part_tbl.
+ * This is an optimization and not strictly necessary.
+ */
+ for (p = 1, highest = 0; p < state->limit; p++)
+ if (state->parts[p].size)
+ highest = p;
+ disk_expand_part_tbl(disk, highest);
+
+ for (p = 1; p < state->limit; p++)
+ if (!blk_add_partition(disk, bdev, state, p))
+ goto out_free_state;
+
+ ret = 0;
+out_free_state:
+ free_partitions(state);
+ return ret;
+}
+
+void *read_part_sector(struct parsed_partitions *state, sector_t n, Sector *p)
+{
+ struct address_space *mapping = state->bdev->bd_inode->i_mapping;
+ struct page *page;
+
+ if (n >= get_capacity(state->bdev->bd_disk)) {
+ state->access_beyond_eod = true;
+ return NULL;
+ }
+
+ page = read_mapping_page(mapping,
+ (pgoff_t)(n >> (PAGE_SHIFT - 9)), NULL);
+ if (IS_ERR(page))
+ goto out;
+ if (PageError(page))
+ goto out_put_page;
+
+ p->v = page;
+ return (unsigned char *)page_address(page) +
+ ((n & ((1 << (PAGE_SHIFT - 9)) - 1)) << SECTOR_SHIFT);
+out_put_page:
+ put_page(page);
+out:
+ p->v = NULL;
+ return NULL;
+}
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
new file mode 100644
index 000000000..b64bfdd43
--- /dev/null
+++ b/block/partitions/efi.c
@@ -0,0 +1,747 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/************************************************************
+ * EFI GUID Partition Table handling
+ *
+ * http://www.uefi.org/specs/
+ * http://www.intel.com/technology/efi/
+ *
+ * efi.[ch] by Matt Domsch <Matt_Domsch@dell.com>
+ * Copyright 2000,2001,2002,2004 Dell Inc.
+ *
+ * TODO:
+ *
+ * Changelog:
+ * Mon August 5th, 2013 Davidlohr Bueso <davidlohr@hp.com>
+ * - detect hybrid MBRs, tighter pMBR checking & cleanups.
+ *
+ * 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/kernel.h>
+#include <linux/crc32.h>
+#include <linux/ctype.h>
+#include <linux/math64.h>
+#include <linux/slab.h>
+#include "check.h"
+#include "efi.h"
+
+/* 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 div_u64(bdev->bd_inode->i_size,
+ bdev_logical_block_size(bdev)) - 1ULL;
+}
+
+static inline int pmbr_part_valid(gpt_mbr_record *part)
+{
+ if (part->os_type != EFI_PMBR_OSTYPE_EFI_GPT)
+ goto invalid;
+
+ /* set to 0x00000001 (i.e., the LBA of the GPT Partition Header) */
+ if (le32_to_cpu(part->starting_lba) != GPT_PRIMARY_PARTITION_TABLE_LBA)
+ goto invalid;
+
+ return GPT_MBR_PROTECTIVE;
+invalid:
+ return 0;
+}
+
+/**
+ * is_pmbr_valid(): test Protective MBR for validity
+ * @mbr: pointer to a legacy mbr structure
+ * @total_sectors: amount of sectors in the device
+ *
+ * Description: Checks for a valid protective or hybrid
+ * master boot record (MBR). The validity of a pMBR depends
+ * on all of the following properties:
+ * 1) MSDOS signature is in the last two bytes of the MBR
+ * 2) One partition of type 0xEE is found
+ *
+ * In addition, a hybrid MBR will have up to three additional
+ * primary partitions, which point to the same space that's
+ * marked out by up to three GPT partitions.
+ *
+ * Returns 0 upon invalid MBR, or GPT_MBR_PROTECTIVE or
+ * GPT_MBR_HYBRID depending on the device layout.
+ */
+static int is_pmbr_valid(legacy_mbr *mbr, sector_t total_sectors)
+{
+ uint32_t sz = 0;
+ int i, part = 0, ret = 0; /* invalid by default */
+
+ if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
+ goto done;
+
+ for (i = 0; i < 4; i++) {
+ ret = pmbr_part_valid(&mbr->partition_record[i]);
+ if (ret == GPT_MBR_PROTECTIVE) {
+ part = i;
+ /*
+ * Ok, we at least know that there's a protective MBR,
+ * now check if there are other partition types for
+ * hybrid MBR.
+ */
+ goto check_hybrid;
+ }
+ }
+
+ if (ret != GPT_MBR_PROTECTIVE)
+ goto done;
+check_hybrid:
+ for (i = 0; i < 4; i++)
+ if ((mbr->partition_record[i].os_type !=
+ EFI_PMBR_OSTYPE_EFI_GPT) &&
+ (mbr->partition_record[i].os_type != 0x00))
+ ret = GPT_MBR_HYBRID;
+
+ /*
+ * Protective MBRs take up the lesser of the whole disk
+ * or 2 TiB (32bit LBA), ignoring the rest of the disk.
+ * Some partitioning programs, nonetheless, choose to set
+ * the size to the maximum 32-bit limitation, disregarding
+ * the disk size.
+ *
+ * Hybrid MBRs do not necessarily comply with this.
+ *
+ * Consider a bad value here to be a warning to support dd'ing
+ * an image from a smaller disk to a larger disk.
+ */
+ if (ret == GPT_MBR_PROTECTIVE) {
+ sz = le32_to_cpu(mbr->partition_record[part].size_in_lba);
+ if (sz != (uint32_t) total_sectors - 1 && sz != 0xFFFFFFFF)
+ pr_debug("GPT: mbr size in lba (%u) different than whole disk (%u).\n",
+ sz, min_t(uint32_t,
+ total_sectors - 1, 0xFFFFFFFF));
+ }
+done:
+ return ret;
+}
+
+/**
+ * read_lba(): Read bytes from disk, starting at given LBA
+ * @state: disk parsed partitions
+ * @lba: the Logical Block Address of the partition table
+ * @buffer: destination buffer
+ * @count: bytes to read
+ *
+ * Description: Reads @count bytes from @state->bdev into @buffer.
+ * Returns number of bytes read on success, 0 on error.
+ */
+static size_t read_lba(struct parsed_partitions *state,
+ u64 lba, u8 *buffer, size_t count)
+{
+ size_t totalreadcount = 0;
+ struct block_device *bdev = state->bdev;
+ sector_t n = lba * (bdev_logical_block_size(bdev) / 512);
+
+ if (!buffer || lba > last_lba(bdev))
+ return 0;
+
+ while (count) {
+ int copied = 512;
+ Sector sect;
+ unsigned char *data = read_part_sector(state, n++, &sect);
+ 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
+ * @state: disk parsed partitions
+ * @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 parsed_partitions *state,
+ gpt_header *gpt)
+{
+ size_t count;
+ gpt_entry *pte;
+
+ if (!gpt)
+ return NULL;
+
+ count = (size_t)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;
+
+ if (read_lba(state, 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
+ * @state: disk parsed partitions
+ * @lba: 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 @state->bdev.
+ * Note: remember to free gpt when finished with it.
+ */
+static gpt_header *alloc_read_gpt_header(struct parsed_partitions *state,
+ u64 lba)
+{
+ gpt_header *gpt;
+ unsigned ssz = bdev_logical_block_size(state->bdev);
+
+ gpt = kmalloc(ssz, GFP_KERNEL);
+ if (!gpt)
+ return NULL;
+
+ if (read_lba(state, lba, (u8 *) gpt, ssz) < ssz) {
+ kfree(gpt);
+ gpt=NULL;
+ return NULL;
+ }
+
+ return gpt;
+}
+
+/**
+ * is_gpt_valid() - tests one GPT header and PTEs for validity
+ * @state: disk parsed partitions
+ * @lba: logical block address of the GPT header to test
+ * @gpt: GPT header ptr, filled on return.
+ * @ptes: 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 parsed_partitions *state, u64 lba,
+ gpt_header **gpt, gpt_entry **ptes)
+{
+ u32 crc, origcrc;
+ u64 lastlba, pt_size;
+
+ if (!ptes)
+ return 0;
+ if (!(*gpt = alloc_read_gpt_header(state, lba)))
+ return 0;
+
+ /* Check the GUID Partition Table signature */
+ if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) {
+ pr_debug("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 header size is too big */
+ if (le32_to_cpu((*gpt)->header_size) >
+ bdev_logical_block_size(state->bdev)) {
+ pr_debug("GUID Partition Table Header size is too large: %u > %u\n",
+ le32_to_cpu((*gpt)->header_size),
+ bdev_logical_block_size(state->bdev));
+ goto fail;
+ }
+
+ /* Check the GUID Partition Table header size is too small */
+ if (le32_to_cpu((*gpt)->header_size) < sizeof(gpt_header)) {
+ pr_debug("GUID Partition Table Header size is too small: %u < %zu\n",
+ le32_to_cpu((*gpt)->header_size),
+ sizeof(gpt_header));
+ 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) {
+ pr_debug("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) {
+ pr_debug("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(state->bdev);
+ if (le64_to_cpu((*gpt)->first_usable_lba) > lastlba) {
+ pr_debug("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) {
+ pr_debug("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 (le64_to_cpu((*gpt)->last_usable_lba) < le64_to_cpu((*gpt)->first_usable_lba)) {
+ pr_debug("GPT: last_usable_lba incorrect: %lld > %lld\n",
+ (unsigned long long)le64_to_cpu((*gpt)->last_usable_lba),
+ (unsigned long long)le64_to_cpu((*gpt)->first_usable_lba));
+ goto fail;
+ }
+ /* Check that sizeof_partition_entry has the correct value */
+ if (le32_to_cpu((*gpt)->sizeof_partition_entry) != sizeof(gpt_entry)) {
+ pr_debug("GUID Partition Entry Size check failed.\n");
+ goto fail;
+ }
+
+ /* Sanity check partition table size */
+ pt_size = (u64)le32_to_cpu((*gpt)->num_partition_entries) *
+ le32_to_cpu((*gpt)->sizeof_partition_entry);
+ if (pt_size > KMALLOC_MAX_SIZE) {
+ pr_debug("GUID Partition Table is too large: %llu > %lu bytes\n",
+ (unsigned long long)pt_size, KMALLOC_MAX_SIZE);
+ goto fail;
+ }
+
+ if (!(*ptes = alloc_read_gpt_entries(state, *gpt)))
+ goto fail;
+
+ /* Check the GUID Partition Entry Array CRC */
+ crc = efi_crc32((const unsigned char *) (*ptes), pt_size);
+
+ if (crc != le32_to_cpu((*gpt)->partition_entry_array_crc32)) {
+ pr_debug("GUID Partition 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:pte to check
+ * @lastlba: 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: primary GPT header
+ * @agpt: alternate GPT header
+ * @lastlba: 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)) {
+ pr_warn("GPT:Primary header LBA != Alt. header alternate_lba\n");
+ pr_warn("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)) {
+ pr_warn("GPT:Primary header alternate_lba != Alt. header my_lba\n");
+ pr_warn("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)) {
+ pr_warn("GPT:first_usable_lbas don't match.\n");
+ pr_warn("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)) {
+ pr_warn("GPT:last_usable_lbas don't match.\n");
+ pr_warn("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)) {
+ pr_warn("GPT:disk_guids don't match.\n");
+ error_found++;
+ }
+ if (le32_to_cpu(pgpt->num_partition_entries) !=
+ le32_to_cpu(agpt->num_partition_entries)) {
+ pr_warn("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)) {
+ pr_warn("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)) {
+ pr_warn("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) {
+ pr_warn("GPT:Primary header thinks Alt. header is not at the end of the disk.\n");
+ pr_warn("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) {
+ pr_warn("GPT:Alternate GPT header not at the end of the disk.\n");
+ pr_warn("GPT:%lld != %lld\n",
+ (unsigned long long)le64_to_cpu(agpt->my_lba),
+ (unsigned long long)lastlba);
+ error_found++;
+ }
+
+ if (error_found)
+ pr_warn("GPT: Use GNU Parted to correct GPT errors.\n");
+ return;
+}
+
+/**
+ * find_valid_gpt() - Search disk for valid GPT headers and PTEs
+ * @state: disk parsed partitions
+ * @gpt: GPT header ptr, filled on return.
+ * @ptes: 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 parsed_partitions *state, 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;
+ sector_t total_sectors = i_size_read(state->bdev->bd_inode) >> 9;
+ u64 lastlba;
+
+ if (!ptes)
+ return 0;
+
+ lastlba = last_lba(state->bdev);
+ if (!force_gpt) {
+ /* This will be added to the EFI Spec. per Intel after v1.02. */
+ legacymbr = kzalloc(sizeof(*legacymbr), GFP_KERNEL);
+ if (!legacymbr)
+ goto fail;
+
+ read_lba(state, 0, (u8 *)legacymbr, sizeof(*legacymbr));
+ good_pmbr = is_pmbr_valid(legacymbr, total_sectors);
+ kfree(legacymbr);
+
+ if (!good_pmbr)
+ goto fail;
+
+ pr_debug("Device has a %s MBR\n",
+ good_pmbr == GPT_MBR_PROTECTIVE ?
+ "protective" : "hybrid");
+ }
+
+ good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
+ &pgpt, &pptes);
+ if (good_pgpt)
+ good_agpt = is_gpt_valid(state,
+ le64_to_cpu(pgpt->alternate_lba),
+ &agpt, &aptes);
+ if (!good_agpt && force_gpt)
+ good_agpt = is_gpt_valid(state, 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)
+ pr_warn("Alternate GPT is invalid, using primary GPT.\n");
+ return 1;
+ }
+ else if (good_agpt) {
+ *gpt = agpt;
+ *ptes = aptes;
+ kfree(pgpt);
+ kfree(pptes);
+ pr_warn("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;
+}
+
+/**
+ * utf16_le_to_7bit(): Naively converts a UTF-16LE string to 7-bit ASCII characters
+ * @in: input UTF-16LE string
+ * @size: size of the input string
+ * @out: output string ptr, should be capable to store @size+1 characters
+ *
+ * Description: Converts @size UTF16-LE symbols from @in string to 7-bit
+ * ASCII characters and stores them to @out. Adds trailing zero to @out array.
+ */
+static void utf16_le_to_7bit(const __le16 *in, unsigned int size, u8 *out)
+{
+ unsigned int i = 0;
+
+ out[size] = 0;
+
+ while (i < size) {
+ u8 c = le16_to_cpu(in[i]) & 0xff;
+
+ if (c && !isprint(c))
+ c = '!';
+ out[i] = c;
+ i++;
+ }
+}
+
+/**
+ * efi_partition(struct parsed_partitions *state)
+ * @state: disk parsed partitions
+ *
+ * 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)
+{
+ gpt_header *gpt = NULL;
+ gpt_entry *ptes = NULL;
+ u32 i;
+ unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
+
+ if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
+ kfree(gpt);
+ kfree(ptes);
+ return 0;
+ }
+
+ pr_debug("GUID Partition Table is valid! Yea!\n");
+
+ for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
+ struct partition_meta_info *info;
+ unsigned label_max;
+ u64 start = le64_to_cpu(ptes[i].starting_lba);
+ u64 size = le64_to_cpu(ptes[i].ending_lba) -
+ le64_to_cpu(ptes[i].starting_lba) + 1ULL;
+
+ if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
+ continue;
+
+ put_partition(state, i+1, start * ssz, size * ssz);
+
+ /* 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 = ADDPART_FLAG_RAID;
+
+ info = &state->parts[i + 1].info;
+ efi_guid_to_str(&ptes[i].unique_partition_guid, info->uuid);
+
+ /* Naively convert UTF16-LE to 7 bits. */
+ label_max = min(ARRAY_SIZE(info->volname) - 1,
+ ARRAY_SIZE(ptes[i].partition_name));
+ utf16_le_to_7bit(ptes[i].partition_name, label_max, info->volname);
+ state->parts[i + 1].has_info = true;
+ }
+ kfree(ptes);
+ kfree(gpt);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
diff --git a/block/partitions/efi.h b/block/partitions/efi.h
new file mode 100644
index 000000000..8cc2b88d0
--- /dev/null
+++ b/block/partitions/efi.h
@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/************************************************************
+ * 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.
+ ************************************************************/
+
+#ifndef FS_PART_EFI_H_INCLUDED
+#define FS_PART_EFI_H_INCLUDED
+
+#include <linux/types.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>
+#include <linux/compiler.h>
+
+#define MSDOS_MBR_SIGNATURE 0xaa55
+#define EFI_PMBR_OSTYPE_EFI 0xEF
+#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
+
+#define GPT_MBR_PROTECTIVE 1
+#define GPT_MBR_HYBRID 2
+
+#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;
+
+ /* The rest of the logical block is reserved by UEFI and must be zero.
+ * EFI standard handles this by:
+ *
+ * uint8_t reserved2[ BlockSize - 92 ];
+ */
+} __packed gpt_header;
+
+typedef struct _gpt_entry_attributes {
+ u64 required_to_function:1;
+ u64 reserved:47;
+ u64 type_guid_specific:16;
+} __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;
+ __le16 partition_name[72/sizeof(__le16)];
+} __packed gpt_entry;
+
+typedef struct _gpt_mbr_record {
+ u8 boot_indicator; /* unused by EFI, set to 0x80 for bootable */
+ u8 start_head; /* unused by EFI, pt start in CHS */
+ u8 start_sector; /* unused by EFI, pt start in CHS */
+ u8 start_track;
+ u8 os_type; /* EFI and legacy non-EFI OS types */
+ u8 end_head; /* unused by EFI, pt end in CHS */
+ u8 end_sector; /* unused by EFI, pt end in CHS */
+ u8 end_track; /* unused by EFI, pt end in CHS */
+ __le32 starting_lba; /* used by EFI - start addr of the on disk pt */
+ __le32 size_in_lba; /* used by EFI - size of pt in LBA */
+} __packed gpt_mbr_record;
+
+
+typedef struct _legacy_mbr {
+ u8 boot_code[440];
+ __le32 unique_mbr_signature;
+ __le16 unknown;
+ gpt_mbr_record partition_record[4];
+ __le16 signature;
+} __packed legacy_mbr;
+
+#endif
diff --git a/block/partitions/ibm.c b/block/partitions/ibm.c
new file mode 100644
index 000000000..4b044e620
--- /dev/null
+++ b/block/partitions/ibm.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Volker Sameske <sameske@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * Copyright IBM Corp. 1999, 2012
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/hdreg.h>
+#include <linux/slab.h>
+#include <asm/dasd.h>
+#include <asm/ebcdic.h>
+#include <linux/uaccess.h>
+#include <asm/vtoc.h>
+#include <linux/module.h>
+#include <linux/dasd_mod.h>
+
+#include "check.h"
+
+union label_t {
+ struct vtoc_volume_label_cdl vol;
+ struct vtoc_volume_label_ldl lnx;
+ struct vtoc_cms_label cms;
+};
+
+/*
+ * compute the block number from a
+ * cyl-cyl-head-head structure
+ */
+static sector_t cchh2blk(struct vtoc_cchh *ptr, struct hd_geometry *geo)
+{
+ sector_t cyl;
+ __u16 head;
+
+ /* decode cylinder and heads for large volumes */
+ cyl = ptr->hh & 0xFFF0;
+ cyl <<= 12;
+ cyl |= ptr->cc;
+ head = ptr->hh & 0x000F;
+ return cyl * geo->heads * geo->sectors +
+ head * geo->sectors;
+}
+
+/*
+ * compute the block number from a
+ * cyl-cyl-head-head-block structure
+ */
+static sector_t cchhb2blk(struct vtoc_cchhb *ptr, struct hd_geometry *geo)
+{
+ sector_t cyl;
+ __u16 head;
+
+ /* decode cylinder and heads for large volumes */
+ cyl = ptr->hh & 0xFFF0;
+ cyl <<= 12;
+ cyl |= ptr->cc;
+ head = ptr->hh & 0x000F;
+ return cyl * geo->heads * geo->sectors +
+ head * geo->sectors +
+ ptr->b;
+}
+
+static int find_label(struct parsed_partitions *state,
+ dasd_information2_t *info,
+ struct hd_geometry *geo,
+ int blocksize,
+ sector_t *labelsect,
+ char name[],
+ char type[],
+ union label_t *label)
+{
+ Sector sect;
+ unsigned char *data;
+ sector_t testsect[3];
+ unsigned char temp[5];
+ int found = 0;
+ int i, testcount;
+
+ /* There a three places where we may find a valid label:
+ * - on an ECKD disk it's block 2
+ * - on an FBA disk it's block 1
+ * - on an CMS formatted FBA disk it is sector 1, even if the block size
+ * is larger than 512 bytes (possible if the DIAG discipline is used)
+ * If we have a valid info structure, then we know exactly which case we
+ * have, otherwise we just search through all possebilities.
+ */
+ if (info) {
+ if ((info->cu_type == 0x6310 && info->dev_type == 0x9336) ||
+ (info->cu_type == 0x3880 && info->dev_type == 0x3370))
+ testsect[0] = info->label_block;
+ else
+ testsect[0] = info->label_block * (blocksize >> 9);
+ testcount = 1;
+ } else {
+ testsect[0] = 1;
+ testsect[1] = (blocksize >> 9);
+ testsect[2] = 2 * (blocksize >> 9);
+ testcount = 3;
+ }
+ for (i = 0; i < testcount; ++i) {
+ data = read_part_sector(state, testsect[i], &sect);
+ if (data == NULL)
+ continue;
+ memcpy(label, data, sizeof(*label));
+ memcpy(temp, data, 4);
+ temp[4] = 0;
+ EBCASC(temp, 4);
+ put_dev_sector(sect);
+ if (!strcmp(temp, "VOL1") ||
+ !strcmp(temp, "LNX1") ||
+ !strcmp(temp, "CMS1")) {
+ if (!strcmp(temp, "VOL1")) {
+ strncpy(type, label->vol.vollbl, 4);
+ strncpy(name, label->vol.volid, 6);
+ } else {
+ strncpy(type, label->lnx.vollbl, 4);
+ strncpy(name, label->lnx.volid, 6);
+ }
+ EBCASC(type, 4);
+ EBCASC(name, 6);
+ *labelsect = testsect[i];
+ found = 1;
+ break;
+ }
+ }
+ if (!found)
+ memset(label, 0, sizeof(*label));
+
+ return found;
+}
+
+static int find_vol1_partitions(struct parsed_partitions *state,
+ struct hd_geometry *geo,
+ int blocksize,
+ char name[],
+ union label_t *label)
+{
+ sector_t blk;
+ int counter;
+ char tmp[64];
+ Sector sect;
+ unsigned char *data;
+ loff_t offset, size;
+ struct vtoc_format1_label f1;
+ int secperblk;
+
+ snprintf(tmp, sizeof(tmp), "VOL1/%8s:", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /*
+ * get start of VTOC from the disk label and then search for format1
+ * and format8 labels
+ */
+ secperblk = blocksize >> 9;
+ blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
+ counter = 0;
+ data = read_part_sector(state, blk * secperblk, &sect);
+ while (data != NULL) {
+ memcpy(&f1, data, sizeof(struct vtoc_format1_label));
+ put_dev_sector(sect);
+ /* skip FMT4 / FMT5 / FMT7 labels */
+ if (f1.DS1FMTID == _ascebc['4']
+ || f1.DS1FMTID == _ascebc['5']
+ || f1.DS1FMTID == _ascebc['7']
+ || f1.DS1FMTID == _ascebc['9']) {
+ blk++;
+ data = read_part_sector(state, blk * secperblk, &sect);
+ continue;
+ }
+ /* only FMT1 and 8 labels valid at this point */
+ if (f1.DS1FMTID != _ascebc['1'] &&
+ f1.DS1FMTID != _ascebc['8'])
+ break;
+ /* OK, we got valid partition data */
+ offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
+ size = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
+ offset + geo->sectors;
+ offset *= secperblk;
+ size *= secperblk;
+ if (counter >= state->limit)
+ break;
+ put_partition(state, counter + 1, offset, size);
+ counter++;
+ blk++;
+ data = read_part_sector(state, blk * secperblk, &sect);
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+ if (!data)
+ return -1;
+
+ return 1;
+}
+
+static int find_lnx1_partitions(struct parsed_partitions *state,
+ struct hd_geometry *geo,
+ int blocksize,
+ char name[],
+ union label_t *label,
+ sector_t labelsect,
+ loff_t i_size,
+ dasd_information2_t *info)
+{
+ loff_t offset, geo_size, size;
+ char tmp[64];
+ int secperblk;
+
+ snprintf(tmp, sizeof(tmp), "LNX1/%8s:", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ secperblk = blocksize >> 9;
+ if (label->lnx.ldl_version == 0xf2) {
+ size = label->lnx.formatted_blocks * secperblk;
+ } else {
+ /*
+ * Formated w/o large volume support. If the sanity check
+ * 'size based on geo == size based on i_size' is true, then
+ * we can safely assume that we know the formatted size of
+ * the disk, otherwise we need additional information
+ * that we can only get from a real DASD device.
+ */
+ geo_size = geo->cylinders * geo->heads
+ * geo->sectors * secperblk;
+ size = i_size >> 9;
+ if (size != geo_size) {
+ if (!info) {
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+ }
+ if (!strcmp(info->type, "ECKD"))
+ if (geo_size < size)
+ size = geo_size;
+ /* else keep size based on i_size */
+ }
+ }
+ /* first and only partition starts in the first block after the label */
+ offset = labelsect + secperblk;
+ put_partition(state, 1, offset, size - offset);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
+
+static int find_cms1_partitions(struct parsed_partitions *state,
+ struct hd_geometry *geo,
+ int blocksize,
+ char name[],
+ union label_t *label,
+ sector_t labelsect)
+{
+ loff_t offset, size;
+ char tmp[64];
+ int secperblk;
+
+ /*
+ * VM style CMS1 labeled disk
+ */
+ blocksize = label->cms.block_size;
+ secperblk = blocksize >> 9;
+ if (label->cms.disk_offset != 0) {
+ snprintf(tmp, sizeof(tmp), "CMS1/%8s(MDSK):", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /* disk is reserved minidisk */
+ offset = label->cms.disk_offset * secperblk;
+ size = (label->cms.block_count - 1) * secperblk;
+ } else {
+ snprintf(tmp, sizeof(tmp), "CMS1/%8s:", name);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /*
+ * Special case for FBA devices:
+ * If an FBA device is CMS formatted with blocksize > 512 byte
+ * and the DIAG discipline is used, then the CMS label is found
+ * in sector 1 instead of block 1. However, the partition is
+ * still supposed to start in block 2.
+ */
+ if (labelsect == 1)
+ offset = 2 * secperblk;
+ else
+ offset = labelsect + secperblk;
+ size = label->cms.block_count * secperblk;
+ }
+
+ put_partition(state, 1, offset, size-offset);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
+
+
+/*
+ * This is the main function, called by check.c
+ */
+int ibm_partition(struct parsed_partitions *state)
+{
+ int (*fn)(struct gendisk *disk, dasd_information2_t *info);
+ struct block_device *bdev = state->bdev;
+ struct gendisk *disk = bdev->bd_disk;
+ int blocksize, res;
+ loff_t i_size, offset, size;
+ dasd_information2_t *info;
+ struct hd_geometry *geo;
+ char type[5] = {0,};
+ char name[7] = {0,};
+ sector_t labelsect;
+ union label_t *label;
+
+ res = 0;
+ if (!disk->fops->getgeo)
+ goto out_exit;
+ fn = symbol_get(dasd_biodasdinfo);
+ blocksize = bdev_logical_block_size(bdev);
+ if (blocksize <= 0)
+ goto out_symbol;
+ i_size = i_size_read(bdev->bd_inode);
+ if (i_size == 0)
+ goto out_symbol;
+ info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
+ if (info == NULL)
+ goto out_symbol;
+ geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
+ if (geo == NULL)
+ goto out_nogeo;
+ label = kmalloc(sizeof(union label_t), GFP_KERNEL);
+ if (label == NULL)
+ goto out_nolab;
+ /* set start if not filled by getgeo function e.g. virtblk */
+ geo->start = get_start_sect(bdev);
+ if (disk->fops->getgeo(bdev, geo))
+ goto out_freeall;
+ if (!fn || fn(disk, info)) {
+ kfree(info);
+ info = NULL;
+ }
+
+ if (find_label(state, info, geo, blocksize, &labelsect, name, type,
+ label)) {
+ if (!strncmp(type, "VOL1", 4)) {
+ res = find_vol1_partitions(state, geo, blocksize, name,
+ label);
+ } else if (!strncmp(type, "LNX1", 4)) {
+ res = find_lnx1_partitions(state, geo, blocksize, name,
+ label, labelsect, i_size,
+ info);
+ } else if (!strncmp(type, "CMS1", 4)) {
+ res = find_cms1_partitions(state, geo, blocksize, name,
+ label, labelsect);
+ }
+ } else if (info) {
+ /*
+ * ugly but needed for backward compatibility:
+ * If the block device is a DASD (i.e. BIODASDINFO2 works),
+ * then we claim it in any case, even though it has no valid
+ * label. If it has the LDL format, then we simply define a
+ * partition as if it had an LNX1 label.
+ */
+ res = 1;
+ if (info->format == DASD_FORMAT_LDL) {
+ strlcat(state->pp_buf, "(nonl)", PAGE_SIZE);
+ size = i_size >> 9;
+ offset = (info->label_block + 1) * (blocksize >> 9);
+ put_partition(state, 1, offset, size-offset);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ }
+ } else
+ res = 0;
+
+out_freeall:
+ kfree(label);
+out_nolab:
+ kfree(geo);
+out_nogeo:
+ kfree(info);
+out_symbol:
+ if (fn)
+ symbol_put(dasd_biodasdinfo);
+out_exit:
+ return res;
+}
diff --git a/block/partitions/karma.c b/block/partitions/karma.c
new file mode 100644
index 000000000..4d93512f4
--- /dev/null
+++ b/block/partitions/karma.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/partitions/karma.c
+ * Rio Karma partition info.
+ *
+ * Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
+ * based on osf.c
+ */
+
+#include "check.h"
+#include <linux/compiler.h>
+
+#define KARMA_LABEL_MAGIC 0xAB56
+
+int karma_partition(struct parsed_partitions *state)
+{
+ int i;
+ int slot = 1;
+ Sector sect;
+ unsigned char *data;
+ struct disklabel {
+ u8 d_reserved[270];
+ struct d_partition {
+ __le32 p_res;
+ u8 p_fstype;
+ u8 p_res2[3];
+ __le32 p_offset;
+ __le32 p_size;
+ } d_partitions[2];
+ u8 d_blank[208];
+ __le16 d_magic;
+ } __packed *label;
+ struct d_partition *p;
+
+ data = read_part_sector(state, 0, &sect);
+ if (!data)
+ return -1;
+
+ label = (struct disklabel *)data;
+ if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ p = label->d_partitions;
+ for (i = 0 ; i < 2; i++, p++) {
+ if (slot == state->limit)
+ break;
+
+ if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
+ put_partition(state, slot, le32_to_cpu(p->p_offset),
+ le32_to_cpu(p->p_size));
+ }
+ slot++;
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ put_dev_sector(sect);
+ return 1;
+}
+
diff --git a/block/partitions/ldm.c b/block/partitions/ldm.c
new file mode 100644
index 000000000..cc86534c8
--- /dev/null
+++ b/block/partitions/ldm.c
@@ -0,0 +1,1498 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * ldm - Support for Windows Logical Disk Manager (Dynamic Disks)
+ *
+ * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
+ * Copyright (c) 2001-2012 Anton Altaparmakov
+ * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
+ *
+ * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads
+ */
+
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/stringify.h>
+#include <linux/kernel.h>
+#include <linux/uuid.h>
+#include <linux/msdos_partition.h>
+
+#include "ldm.h"
+#include "check.h"
+
+/*
+ * 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, __func__, f, ##a)
+#endif
+
+#define ldm_crit(f, a...) _ldm_printk (KERN_CRIT, __func__, f, ##a)
+#define ldm_error(f, a...) _ldm_printk (KERN_ERR, __func__, f, ##a)
+#define ldm_info(f, a...) _ldm_printk (KERN_INFO, __func__, f, ##a)
+
+static __printf(3, 4)
+void _ldm_printk(const char *level, const char *function, const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start (args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ printk("%s%s(): %pV\n", level, function, &vaf);
+
+ va_end(args);
+}
+
+/**
+ * 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)
+{
+ bool is_vista = false;
+
+ BUG_ON(!data || !ph);
+ if (MAGIC_PRIVHEAD != get_unaligned_be64(data)) {
+ ldm_error("Cannot find PRIVHEAD structure. LDM database is"
+ " corrupt. Aborting.");
+ return false;
+ }
+ ph->ver_major = get_unaligned_be16(data + 0x000C);
+ ph->ver_minor = get_unaligned_be16(data + 0x000E);
+ ph->logical_disk_start = get_unaligned_be64(data + 0x011B);
+ ph->logical_disk_size = get_unaligned_be64(data + 0x0123);
+ ph->config_start = get_unaligned_be64(data + 0x012B);
+ ph->config_size = get_unaligned_be64(data + 0x0133);
+ /* Version 2.11 is Win2k/XP and version 2.12 is Vista. */
+ if (ph->ver_major == 2 && ph->ver_minor == 12)
+ is_vista = true;
+ if (!is_vista && (ph->ver_major != 2 || ph->ver_minor != 11)) {
+ ldm_error("Expected PRIVHEAD version 2.11 or 2.12, got %d.%d."
+ " Aborting.", ph->ver_major, ph->ver_minor);
+ return false;
+ }
+ ldm_debug("PRIVHEAD version %d.%d (Windows %s).", ph->ver_major,
+ ph->ver_minor, is_vista ? "Vista" : "2000/XP");
+ 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 (uuid_parse(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 != get_unaligned_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 = get_unaligned_be64(data + 0x2E);
+ toc->bitmap1_size = get_unaligned_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 = get_unaligned_be64(data + 0x50);
+ toc->bitmap2_size = get_unaligned_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 != get_unaligned_be32(data)) {
+ ldm_crit ("Cannot find the VMDB, database may be corrupt.");
+ return false;
+ }
+
+ vm->ver_major = get_unaligned_be16(data + 0x12);
+ vm->ver_minor = get_unaligned_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 = get_unaligned_be32(data + 0x08);
+ if (vm->vblk_size == 0) {
+ ldm_error ("Illegal VBLK size");
+ return false;
+ }
+
+ vm->vblk_offset = get_unaligned_be32(data + 0x0C);
+ vm->last_vblk_seq = get_unaligned_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) &&
+ uuid_equal(&ph1->disk_id, &ph2->disk_id));
+}
+
+/**
+ * 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
+ * @state: Partition check state including 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 parsed_partitions *state,
+ 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 (!state || !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_part_sector(state, ph[0]->config_start + off[i],
+ &sect);
+ 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 = state->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
+ * @state: Partition check state including device holding the LDM Database
+ * @base: Offset, into @state->bdev, of the database
+ * @ldb: Cache of the database structures
+ *
+ * Find and compare the four tables of contents of the LDM Database stored on
+ * @state->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 parsed_partitions *state,
+ 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;
+ int i, nr_tbs;
+ bool result = false;
+
+ BUG_ON(!state || !ldb);
+ ph = &ldb->ph;
+ tb[0] = &ldb->toc;
+ tb[1] = kmalloc_array(3, sizeof(*tb[1]), GFP_KERNEL);
+ if (!tb[1]) {
+ ldm_crit("Out of memory.");
+ goto err;
+ }
+ tb[2] = (struct tocblock*)((u8*)tb[1] + sizeof(*tb[1]));
+ tb[3] = (struct tocblock*)((u8*)tb[2] + sizeof(*tb[2]));
+ /*
+ * Try to read and parse all four TOCBLOCKs.
+ *
+ * Windows Vista LDM v2.12 does not always have all four TOCBLOCKs so
+ * skip any that fail as long as we get at least one valid TOCBLOCK.
+ */
+ for (nr_tbs = i = 0; i < 4; i++) {
+ data = read_part_sector(state, base + off[i], &sect);
+ if (!data) {
+ ldm_error("Disk read failed for TOCBLOCK %d.", i);
+ continue;
+ }
+ if (ldm_parse_tocblock(data, tb[nr_tbs]))
+ nr_tbs++;
+ put_dev_sector(sect);
+ }
+ if (!nr_tbs) {
+ ldm_crit("Failed to find a valid TOCBLOCK.");
+ goto err;
+ }
+ /* Range check the TOCBLOCK 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 err;
+ }
+ /* Compare all loaded TOCBLOCKs. */
+ for (i = 1; i < nr_tbs; i++) {
+ if (!ldm_compare_tocblocks(tb[0], tb[i])) {
+ ldm_crit("TOCBLOCKs 0 and %d do not match.", i);
+ goto err;
+ }
+ }
+ ldm_debug("Validated %d TOCBLOCKs successfully.", nr_tbs);
+ result = true;
+err:
+ kfree(tb[1]);
+ return result;
+}
+
+/**
+ * ldm_validate_vmdb - Read the VMDB and validate it
+ * @state: Partition check state including 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 parsed_partitions *state,
+ unsigned long base, struct ldmdb *ldb)
+{
+ Sector sect;
+ u8 *data;
+ bool result = false;
+ struct vmdb *vm;
+ struct tocblock *toc;
+
+ BUG_ON (!state || !ldb);
+
+ vm = &ldb->vm;
+ toc = &ldb->toc;
+
+ data = read_part_sector(state, base + OFF_VMDB, &sect);
+ if (!data) {
+ ldm_crit ("Disk read failed.");
+ return false;
+ }
+
+ if (!ldm_parse_vmdb (data, vm))
+ goto out; /* Already logged */
+
+ /* Are there uncommitted transactions? */
+ if (get_unaligned_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
+ * @state: Partition check state including 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_part_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' @state->bdev is a dynamic disk
+ * 'false' @state->bdev is not a dynamic disk, or an error occurred
+ */
+static bool ldm_validate_partition_table(struct parsed_partitions *state)
+{
+ Sector sect;
+ u8 *data;
+ struct msdos_partition *p;
+ int i;
+ bool result = false;
+
+ BUG_ON(!state);
+
+ data = read_part_sector(state, 0, &sect);
+ if (!data) {
+ ldm_info ("Disk read failed.");
+ return false;
+ }
+
+ if (*(__le16*) (data + 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC))
+ goto out;
+
+ p = (struct msdos_partition *)(data + 0x01BE);
+ for (i = 0; i < 4; i++, p++)
+ if (p->sys_ind == LDM_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 (uuid_equal(&v->vblk.disk.disk_id, &ldb->ph.disk_id))
+ 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;
+ }
+
+ strlcat(pp->pp_buf, " [LDM]", PAGE_SIZE);
+
+ /* 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++;
+ }
+
+ strlcat(pp->pp_buf, "\n", PAGE_SIZE);
+ 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) {
+ if (!buffer)
+ ldm_error("!buffer");
+ if (offset < 0)
+ ldm_error("offset (%d) < 0", offset);
+ if (base > buflen)
+ ldm_error("base (%d) > buflen (%d)", base, buflen);
+ return -1;
+ }
+ if (base + buffer[base] >= buflen) {
+ ldm_error("base (%d) + buffer[base] (%d) >= buflen (%d)", 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 != get_unaligned_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 != get_unaligned_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;
+
+ 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 != get_unaligned_be32(buffer + 0x14))
+ return false;
+
+ 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 != get_unaligned_be32(buffer + 0x14))
+ return false;
+
+ disk = &vb->vblk.disk;
+ ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name,
+ sizeof (disk->alt_name));
+ if (uuid_parse(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 != get_unaligned_be32(buffer + 0x14))
+ return false;
+
+ disk = &vb->vblk.disk;
+ import_uuid(&disk->disk_id, buffer + 0x18 + r_name);
+ 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);
+ if (r_objid < 0) {
+ ldm_error("r_objid %d < 0", r_objid);
+ return false;
+ }
+ r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
+ if (r_name < 0) {
+ ldm_error("r_name %d < 0", r_name);
+ return false;
+ }
+ r_size = ldm_relative(buffer, buflen, 0x34, r_name);
+ if (r_size < 0) {
+ ldm_error("r_size %d < 0", r_size);
+ return false;
+ }
+ r_parent = ldm_relative(buffer, buflen, 0x34, r_size);
+ if (r_parent < 0) {
+ ldm_error("r_parent %d < 0", r_parent);
+ return false;
+ }
+ r_diskid = ldm_relative(buffer, buflen, 0x34, r_parent);
+ if (r_diskid < 0) {
+ ldm_error("r_diskid %d < 0", r_diskid);
+ return false;
+ }
+ if (buffer[0x12] & VBLK_FLAG_PART_INDEX) {
+ r_index = ldm_relative(buffer, buflen, 0x34, r_diskid);
+ if (r_index < 0) {
+ ldm_error("r_index %d < 0", r_index);
+ return false;
+ }
+ len = r_index;
+ } else {
+ r_index = 0;
+ len = r_diskid;
+ }
+ if (len < 0) {
+ ldm_error("len %d < 0", len);
+ return false;
+ }
+ len += VBLK_SIZE_PRT3;
+ if (len > get_unaligned_be32(buffer + 0x14)) {
+ ldm_error("len %d > BE32(buffer + 0x14) %d", len,
+ get_unaligned_be32(buffer + 0x14));
+ return false;
+ }
+ part = &vb->vblk.part;
+ part->start = get_unaligned_be64(buffer + 0x24 + r_name);
+ part->volume_offset = get_unaligned_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_disable_drive_letter, r_child, r_size;
+ int r_id1, r_id2, r_size2, r_drive, len;
+ struct vblk_volu *volu;
+
+ BUG_ON(!buffer || !vb);
+ r_objid = ldm_relative(buffer, buflen, 0x18, 0);
+ if (r_objid < 0) {
+ ldm_error("r_objid %d < 0", r_objid);
+ return false;
+ }
+ r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
+ if (r_name < 0) {
+ ldm_error("r_name %d < 0", r_name);
+ return false;
+ }
+ r_vtype = ldm_relative(buffer, buflen, 0x18, r_name);
+ if (r_vtype < 0) {
+ ldm_error("r_vtype %d < 0", r_vtype);
+ return false;
+ }
+ r_disable_drive_letter = ldm_relative(buffer, buflen, 0x18, r_vtype);
+ if (r_disable_drive_letter < 0) {
+ ldm_error("r_disable_drive_letter %d < 0",
+ r_disable_drive_letter);
+ return false;
+ }
+ r_child = ldm_relative(buffer, buflen, 0x2D, r_disable_drive_letter);
+ if (r_child < 0) {
+ ldm_error("r_child %d < 0", r_child);
+ return false;
+ }
+ r_size = ldm_relative(buffer, buflen, 0x3D, r_child);
+ if (r_size < 0) {
+ ldm_error("r_size %d < 0", r_size);
+ return false;
+ }
+ if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) {
+ r_id1 = ldm_relative(buffer, buflen, 0x52, r_size);
+ if (r_id1 < 0) {
+ ldm_error("r_id1 %d < 0", r_id1);
+ return false;
+ }
+ } else
+ r_id1 = r_size;
+ if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) {
+ r_id2 = ldm_relative(buffer, buflen, 0x52, r_id1);
+ if (r_id2 < 0) {
+ ldm_error("r_id2 %d < 0", r_id2);
+ return false;
+ }
+ } else
+ r_id2 = r_id1;
+ if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) {
+ r_size2 = ldm_relative(buffer, buflen, 0x52, r_id2);
+ if (r_size2 < 0) {
+ ldm_error("r_size2 %d < 0", r_size2);
+ return false;
+ }
+ } else
+ r_size2 = r_id2;
+ if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
+ r_drive = ldm_relative(buffer, buflen, 0x52, r_size2);
+ if (r_drive < 0) {
+ ldm_error("r_drive %d < 0", r_drive);
+ return false;
+ }
+ } else
+ r_drive = r_size2;
+ len = r_drive;
+ if (len < 0) {
+ ldm_error("len %d < 0", len);
+ return false;
+ }
+ len += VBLK_SIZE_VOL5;
+ if (len > get_unaligned_be32(buffer + 0x14)) {
+ ldm_error("len %d > BE32(buffer + 0x14) %d", len,
+ get_unaligned_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 + 0x18 + r_disable_drive_letter,
+ sizeof(volu->volume_state));
+ volu->size = ldm_get_vnum(buffer + 0x3D + r_child);
+ volu->partition_type = buffer[0x41 + r_size];
+ memcpy(volu->guid, buffer + 0x42 + r_size, sizeof(volu->guid));
+ if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
+ ldm_get_vstr(buffer + 0x52 + 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);
+
+ if (size < 2 * VBLK_SIZE_HEAD) {
+ ldm_error("Value of size is too small.");
+ return false;
+ }
+
+ group = get_unaligned_be32(data + 0x08);
+ rec = get_unaligned_be16(data + 0x0C);
+ num = get_unaligned_be16(data + 0x0E);
+ if ((num < 1) || (num > 4)) {
+ ldm_error ("A VBLK claims to have %d parts.", num);
+ return false;
+ }
+ if (rec >= num) {
+ ldm_error("REC value (%d) exceeds NUM value (%d)", rec, 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 (rec >= f->num) {
+ ldm_error("REC value (%d) exceeds NUM value (%d)", rec, f->num);
+ return false;
+ }
+ 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 (!rec)
+ memcpy(f->data, data, VBLK_SIZE_HEAD);
+ data += VBLK_SIZE_HEAD;
+ size -= VBLK_SIZE_HEAD;
+ memcpy(f->data + VBLK_SIZE_HEAD + rec * size, 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
+ * @state: Partition check state including device holding the LDM Database
+ * @base: Offset, into @state->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 parsed_partitions *state, 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(!state || !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_part_sector(state, base + OFF_VMDB + s, &sect);
+ if (!data) {
+ ldm_crit ("Disk read failed.");
+ goto out;
+ }
+
+ for (v = 0; v < perbuf; v++, data+=size) { /* For each vblk */
+ if (MAGIC_VBLK != get_unaligned_be32(data)) {
+ ldm_error ("Expected to find a VBLK.");
+ goto out;
+ }
+
+ recs = get_unaligned_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
+ * @state: Partition check state including 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, @state->bdev is a dynamic disk and we handled it
+ * 0 Success, @state->bdev is not a dynamic disk
+ * -1 An error occurred before enough information had been read
+ * Or @state->bdev is a dynamic disk, but it may be corrupted
+ */
+int ldm_partition(struct parsed_partitions *state)
+{
+ struct ldmdb *ldb;
+ unsigned long base;
+ int result = -1;
+
+ BUG_ON(!state);
+
+ /* Look for signs of a Dynamic Disk */
+ if (!ldm_validate_partition_table(state))
+ 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(state, &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(state, base, ldb) ||
+ !ldm_validate_vmdb(state, 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(state, 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(state, 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/block/partitions/ldm.h b/block/partitions/ldm.h
new file mode 100644
index 000000000..8693704dc
--- /dev/null
+++ b/block/partitions/ldm.h
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * ldm - Part of the Linux-NTFS project.
+ *
+ * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
+ * Copyright (c) 2001-2007 Anton Altaparmakov
+ * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
+ *
+ * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads
+ */
+
+#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 58
+
+/* 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 LDM_PARTITION 0x42 /* Formerly SFS (Landis). */
+
+#define TOC_BITMAP1 "config" /* Names of the two defined */
+#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */
+
+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[];
+};
+
+/* In memory LDM database structures. */
+
+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;
+ uuid_t disk_id;
+};
+
+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 */
+ uuid_t disk_id;
+ 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;
+};
+
+#endif /* _FS_PT_LDM_H_ */
+
diff --git a/block/partitions/mac.c b/block/partitions/mac.c
new file mode 100644
index 000000000..b60953356
--- /dev/null
+++ b/block/partitions/mac.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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/ctype.h>
+#include "check.h"
+#include "mac.h"
+
+#ifdef CONFIG_PPC_PMAC
+#include <asm/machdep.h>
+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)
+{
+ Sector sect;
+ unsigned char *data;
+ int slot, blocks_in_map;
+ unsigned secsize, datasize, partoffset;
+#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 = read_part_sector(state, 0, &sect);
+ 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);
+ datasize = round_down(secsize, 512);
+ data = read_part_sector(state, datasize / 512, &sect);
+ if (!data)
+ return -1;
+ partoffset = secsize % 512;
+ if (partoffset + sizeof(*part) > datasize)
+ return -1;
+ part = (struct mac_partition *) (data + partoffset);
+ if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
+ put_dev_sector(sect);
+ return 0; /* not a MacOS disk */
+ }
+ blocks_in_map = be32_to_cpu(part->map_count);
+ if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ if (blocks_in_map >= state->limit)
+ blocks_in_map = state->limit - 1;
+
+ strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
+ for (slot = 1; slot <= blocks_in_map; ++slot) {
+ int pos = slot * secsize;
+ put_dev_sector(sect);
+ data = read_part_sector(state, pos/512, &sect);
+ 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));
+
+ if (!strncasecmp(part->type, "Linux_RAID", 10))
+ state->parts[slot].flags = ADDPART_FLAG_RAID;
+#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_is(powermac)) {
+ 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
+ || (strncasecmp(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 (strncasecmp(part->name + i, "root",
+ 4) == 0) {
+ goodness += 2;
+ break;
+ }
+ }
+ if (strncasecmp(part->name, "swap", 4) == 0)
+ goodness--;
+ }
+
+ if (goodness > found_root_goodness) {
+ found_root = slot;
+ found_root_goodness = goodness;
+ }
+ }
+#endif /* CONFIG_PPC_PMAC */
+ }
+#ifdef CONFIG_PPC_PMAC
+ if (found_root_goodness)
+ note_bootable_part(state->bdev->bd_dev, found_root,
+ found_root_goodness);
+#endif
+
+ put_dev_sector(sect);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}
diff --git a/block/partitions/mac.h b/block/partitions/mac.h
new file mode 100644
index 000000000..0e41c9da7
--- /dev/null
+++ b/block/partitions/mac.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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 */
+};
+
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c
new file mode 100644
index 000000000..c94de377c
--- /dev/null
+++ b/block/partitions/msdos.c
@@ -0,0 +1,715 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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
+ *
+ * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>
+ * updated by Marc Espie <Marc.Espie@openbsd.org>
+ *
+ * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>
+ * and Krzysztof G. Baranowski <kgb@knm.org.pl>
+ */
+#include <linux/msdos_fs.h>
+#include <linux/msdos_partition.h>
+
+#include "check.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>
+
+static inline sector_t nr_sects(struct msdos_partition *p)
+{
+ return (sector_t)get_unaligned_le32(&p->nr_sects);
+}
+
+static inline sector_t start_sect(struct msdos_partition *p)
+{
+ return (sector_t)get_unaligned_le32(&p->start_sect);
+}
+
+static inline int is_extended_partition(struct msdos_partition *p)
+{
+ return (p->sys_ind == DOS_EXTENDED_PARTITION ||
+ p->sys_ind == WIN98_EXTENDED_PARTITION ||
+ p->sys_ind == 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);
+}
+
+/* Value is EBCDIC 'IBMA' */
+#define AIX_LABEL_MAGIC1 0xC9
+#define AIX_LABEL_MAGIC2 0xC2
+#define AIX_LABEL_MAGIC3 0xD4
+#define AIX_LABEL_MAGIC4 0xC1
+static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
+{
+ struct msdos_partition *pt = (struct msdos_partition *) (p + 0x1be);
+ Sector sect;
+ unsigned char *d;
+ int slot, ret = 0;
+
+ if (!(p[0] == AIX_LABEL_MAGIC1 &&
+ p[1] == AIX_LABEL_MAGIC2 &&
+ p[2] == AIX_LABEL_MAGIC3 &&
+ p[3] == AIX_LABEL_MAGIC4))
+ return 0;
+
+ /*
+ * Assume the partition table is valid if Linux partitions exists.
+ * Note that old Solaris/x86 partitions use the same indicator as
+ * Linux swap partitions, so we consider that a Linux partition as
+ * well.
+ */
+ for (slot = 1; slot <= 4; slot++, pt++) {
+ if (pt->sys_ind == SOLARIS_X86_PARTITION ||
+ pt->sys_ind == LINUX_RAID_PARTITION ||
+ pt->sys_ind == LINUX_DATA_PARTITION ||
+ pt->sys_ind == LINUX_LVM_PARTITION ||
+ is_extended_partition(pt))
+ return 0;
+ }
+ d = read_part_sector(state, 7, &sect);
+ if (d) {
+ if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')
+ ret = 1;
+ put_dev_sector(sect);
+ }
+ return ret;
+}
+
+static void set_info(struct parsed_partitions *state, int slot,
+ u32 disksig)
+{
+ struct partition_meta_info *info = &state->parts[slot].info;
+
+ snprintf(info->uuid, sizeof(info->uuid), "%08x-%02x", disksig,
+ slot);
+ info->volname[0] = 0;
+ state->parts[slot].has_info = true;
+}
+
+/*
+ * 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,
+ sector_t first_sector, sector_t first_size,
+ u32 disksig)
+{
+ struct msdos_partition *p;
+ Sector sect;
+ unsigned char *data;
+ sector_t this_sector, this_size;
+ sector_t sector_size = bdev_logical_block_size(state->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_part_sector(state, this_sector, &sect);
+ if (!data)
+ return;
+
+ if (!msdos_magic_present(data + 510))
+ goto done;
+
+ p = (struct msdos_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++) {
+ sector_t offs, size, next;
+
+ 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);
+ set_info(state, state->next, disksig);
+ if (p->sys_ind == LINUX_RAID_PARTITION)
+ state->parts[state->next].flags = ADDPART_FLAG_RAID;
+ 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);
+}
+
+#define SOLARIS_X86_NUMSLICE 16
+#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
+
+struct solaris_x86_slice {
+ __le16 s_tag; /* ID tag of partition */
+ __le16 s_flag; /* permission flags */
+ __le32 s_start; /* start sector no of partition */
+ __le32 s_size; /* # of blocks in partition */
+};
+
+struct solaris_x86_vtoc {
+ unsigned int v_bootinfo[3]; /* info needed by mboot */
+ __le32 v_sanity; /* to verify vtoc sanity */
+ __le32 v_version; /* layout version */
+ char v_volume[8]; /* volume name */
+ __le16 v_sectorsz; /* sector size in bytes */
+ __le16 v_nparts; /* number of partitions */
+ unsigned int v_reserved[10]; /* free space */
+ struct solaris_x86_slice
+ v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
+ unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp */
+ char v_asciilabel[128]; /* for compatibility */
+};
+
+/* 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,
+ sector_t offset, sector_t size, int origin)
+{
+#ifdef CONFIG_SOLARIS_X86_PARTITION
+ Sector sect;
+ struct solaris_x86_vtoc *v;
+ int i;
+ short max_nparts;
+
+ v = read_part_sector(state, offset + 1, &sect);
+ if (!v)
+ return;
+ if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
+ put_dev_sector(sect);
+ return;
+ }
+ {
+ char tmp[1 + BDEVNAME_SIZE + 10 + 11 + 1];
+
+ snprintf(tmp, sizeof(tmp), " %s%d: <solaris:", state->name, origin);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ }
+ if (le32_to_cpu(v->v_version) != 1) {
+ char tmp[64];
+
+ snprintf(tmp, sizeof(tmp), " cannot handle version %d vtoc>\n",
+ le32_to_cpu(v->v_version));
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ put_dev_sector(sect);
+ return;
+ }
+ /* Ensure we can handle previous case of VTOC with 8 entries gracefully */
+ max_nparts = le16_to_cpu(v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
+ for (i = 0; i < max_nparts && state->next < state->limit; i++) {
+ struct solaris_x86_slice *s = &v->v_slice[i];
+ char tmp[3 + 10 + 1 + 1];
+
+ if (s->s_size == 0)
+ continue;
+ snprintf(tmp, sizeof(tmp), " [s%d]", i);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ /* 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);
+ strlcat(state->pp_buf, " >\n", PAGE_SIZE);
+#endif
+}
+
+/* check against BSD src/sys/sys/disklabel.h for consistency */
+#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
+#define BSD_MAXPARTITIONS 16
+#define OPENBSD_MAXPARTITIONS 16
+#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */
+struct bsd_disklabel {
+ __le32 d_magic; /* the magic number */
+ __s16 d_type; /* drive type */
+ __s16 d_subtype; /* controller/d_type specific */
+ char d_typename[16]; /* type name, e.g. "eagle" */
+ char d_packname[16]; /* pack identifier */
+ __u32 d_secsize; /* # of bytes per sector */
+ __u32 d_nsectors; /* # of data sectors per track */
+ __u32 d_ntracks; /* # of tracks per cylinder */
+ __u32 d_ncylinders; /* # of data cylinders per unit */
+ __u32 d_secpercyl; /* # of data sectors per cylinder */
+ __u32 d_secperunit; /* # of data sectors per unit */
+ __u16 d_sparespertrack; /* # of spare sectors per track */
+ __u16 d_sparespercyl; /* # of spare sectors per cylinder */
+ __u32 d_acylinders; /* # of alt. cylinders per unit */
+ __u16 d_rpm; /* rotational speed */
+ __u16 d_interleave; /* hardware sector interleave */
+ __u16 d_trackskew; /* sector 0 skew, per track */
+ __u16 d_cylskew; /* sector 0 skew, per cylinder */
+ __u32 d_headswitch; /* head switch time, usec */
+ __u32 d_trkseek; /* track-to-track seek, usec */
+ __u32 d_flags; /* generic flags */
+#define NDDATA 5
+ __u32 d_drivedata[NDDATA]; /* drive-type specific information */
+#define NSPARE 5
+ __u32 d_spare[NSPARE]; /* reserved for future use */
+ __le32 d_magic2; /* the magic number (again) */
+ __le16 d_checksum; /* xor of data incl. partitions */
+
+ /* filesystem and partition information: */
+ __le16 d_npartitions; /* number of partitions in following */
+ __le32 d_bbsize; /* size of boot area at sn0, bytes */
+ __le32 d_sbsize; /* max size of fs superblock, bytes */
+ struct bsd_partition { /* the partition table */
+ __le32 p_size; /* number of sectors in partition */
+ __le32 p_offset; /* starting sector */
+ __le32 p_fsize; /* filesystem basic fragment size */
+ __u8 p_fstype; /* filesystem type, see below */
+ __u8 p_frag; /* filesystem fragments per block */
+ __le16 p_cpg; /* filesystem cylinders per group */
+ } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
+};
+
+#if defined(CONFIG_BSD_DISKLABEL)
+/*
+ * Create devices for BSD partitions listed in a disklabel, under a
+ * dos-like partition. See parse_extended() for more information.
+ */
+static void parse_bsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin, char *flavour,
+ int max_partitions)
+{
+ Sector sect;
+ struct bsd_disklabel *l;
+ struct bsd_partition *p;
+ char tmp[64];
+
+ l = read_part_sector(state, offset + 1, &sect);
+ if (!l)
+ return;
+ if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
+ put_dev_sector(sect);
+ return;
+ }
+
+ snprintf(tmp, sizeof(tmp), " %s%d: <%s:", state->name, origin, flavour);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+
+ 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++) {
+ sector_t 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);
+ /* FreeBSD has relative offset if C partition offset is zero */
+ if (memcmp(flavour, "bsd\0", 4) == 0 &&
+ le32_to_cpu(l->d_partitions[2].p_offset) == 0)
+ bsd_start += offset;
+ 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) {
+ strlcat(state->pp_buf, "bad subpartition - ignored\n", PAGE_SIZE);
+ continue;
+ }
+ put_partition(state, state->next++, bsd_start, bsd_size);
+ }
+ put_dev_sector(sect);
+ if (le16_to_cpu(l->d_npartitions) > max_partitions) {
+ snprintf(tmp, sizeof(tmp), " (ignored %d more)",
+ le16_to_cpu(l->d_npartitions) - max_partitions);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ }
+ strlcat(state->pp_buf, " >\n", PAGE_SIZE);
+}
+#endif
+
+static void parse_freebsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
+{
+#ifdef CONFIG_BSD_DISKLABEL
+ parse_bsd(state, offset, size, origin, "bsd", BSD_MAXPARTITIONS);
+#endif
+}
+
+static void parse_netbsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
+{
+#ifdef CONFIG_BSD_DISKLABEL
+ parse_bsd(state, offset, size, origin, "netbsd", BSD_MAXPARTITIONS);
+#endif
+}
+
+static void parse_openbsd(struct parsed_partitions *state,
+ sector_t offset, sector_t size, int origin)
+{
+#ifdef CONFIG_BSD_DISKLABEL
+ parse_bsd(state, offset, size, origin, "openbsd",
+ OPENBSD_MAXPARTITIONS);
+#endif
+}
+
+#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */
+#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */
+#define UNIXWARE_NUMSLICE 16
+#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */
+
+struct unixware_slice {
+ __le16 s_label; /* label */
+ __le16 s_flags; /* permission flags */
+ __le32 start_sect; /* starting sector */
+ __le32 nr_sects; /* number of sectors in slice */
+};
+
+struct unixware_disklabel {
+ __le32 d_type; /* drive type */
+ __le32 d_magic; /* the magic number */
+ __le32 d_version; /* version number */
+ char d_serial[12]; /* serial number of the device */
+ __le32 d_ncylinders; /* # of data cylinders per device */
+ __le32 d_ntracks; /* # of tracks per cylinder */
+ __le32 d_nsectors; /* # of data sectors per track */
+ __le32 d_secsize; /* # of bytes per sector */
+ __le32 d_part_start; /* # of first sector of this partition*/
+ __le32 d_unknown1[12]; /* ? */
+ __le32 d_alt_tbl; /* byte offset of alternate table */
+ __le32 d_alt_len; /* byte length of alternate table */
+ __le32 d_phys_cyl; /* # of physical cylinders per device */
+ __le32 d_phys_trk; /* # of physical tracks per cylinder */
+ __le32 d_phys_sec; /* # of physical sectors per track */
+ __le32 d_phys_bytes; /* # of physical bytes per sector */
+ __le32 d_unknown2; /* ? */
+ __le32 d_unknown3; /* ? */
+ __le32 d_pad[8]; /* pad */
+
+ struct unixware_vtoc {
+ __le32 v_magic; /* the magic number */
+ __le32 v_version; /* version number */
+ char v_name[8]; /* volume name */
+ __le16 v_nslices; /* # of slices */
+ __le16 v_unknown1; /* ? */
+ __le32 v_reserved[10]; /* reserved */
+ struct unixware_slice
+ v_slice[UNIXWARE_NUMSLICE]; /* slice headers */
+ } vtoc;
+}; /* 408 */
+
+/*
+ * 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,
+ sector_t offset, sector_t size, int origin)
+{
+#ifdef CONFIG_UNIXWARE_DISKLABEL
+ Sector sect;
+ struct unixware_disklabel *l;
+ struct unixware_slice *p;
+
+ l = read_part_sector(state, offset + 29, &sect);
+ 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;
+ }
+ {
+ char tmp[1 + BDEVNAME_SIZE + 10 + 12 + 1];
+
+ snprintf(tmp, sizeof(tmp), " %s%d: <unixware:", state->name, origin);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ }
+ 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++,
+ le32_to_cpu(p->start_sect),
+ le32_to_cpu(p->nr_sects));
+ p++;
+ }
+ put_dev_sector(sect);
+ strlcat(state->pp_buf, " >\n", PAGE_SIZE);
+#endif
+}
+
+#define MINIX_NR_SUBPARTITIONS 4
+
+/*
+ * 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,
+ sector_t offset, sector_t size, int origin)
+{
+#ifdef CONFIG_MINIX_SUBPARTITION
+ Sector sect;
+ unsigned char *data;
+ struct msdos_partition *p;
+ int i;
+
+ data = read_part_sector(state, offset, &sect);
+ if (!data)
+ return;
+
+ p = (struct msdos_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) &&
+ p->sys_ind == MINIX_PARTITION) { /* subpartition table present */
+ char tmp[1 + BDEVNAME_SIZE + 10 + 9 + 1];
+
+ snprintf(tmp, sizeof(tmp), " %s%d: <minix:", state->name, origin);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) {
+ if (state->next == state->limit)
+ break;
+ /* add each partition in use */
+ if (p->sys_ind == MINIX_PARTITION)
+ put_partition(state, state->next++,
+ start_sect(p), nr_sects(p));
+ }
+ strlcat(state->pp_buf, " >\n", PAGE_SIZE);
+ }
+ put_dev_sector(sect);
+#endif /* CONFIG_MINIX_SUBPARTITION */
+}
+
+static struct {
+ unsigned char id;
+ void (*parse)(struct parsed_partitions *, sector_t, sector_t, 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)
+{
+ sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
+ Sector sect;
+ unsigned char *data;
+ struct msdos_partition *p;
+ struct fat_boot_sector *fb;
+ int slot;
+ u32 disksig;
+
+ data = read_part_sector(state, 0, &sect);
+ if (!data)
+ return -1;
+
+ /*
+ * Note order! (some AIX disks, e.g. unbootable kind,
+ * have no MSDOS 55aa)
+ */
+ if (aix_magic_present(state, data)) {
+ put_dev_sector(sect);
+#ifdef CONFIG_AIX_PARTITION
+ return aix_partition(state);
+#else
+ strlcat(state->pp_buf, " [AIX]", PAGE_SIZE);
+ return 0;
+#endif
+ }
+
+ 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 msdos_partition *) (data + 0x1be);
+ for (slot = 1; slot <= 4; slot++, p++) {
+ if (p->boot_ind != 0 && p->boot_ind != 0x80) {
+ /*
+ * Even without a valid boot inidicator value
+ * its still possible this is valid FAT filesystem
+ * without a partition table.
+ */
+ fb = (struct fat_boot_sector *) data;
+ if (slot == 1 && fb->reserved && fb->fats
+ && fat_valid_media(fb->media)) {
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ put_dev_sector(sect);
+ return 1;
+ } else {
+ put_dev_sector(sect);
+ return 0;
+ }
+ }
+ }
+
+#ifdef CONFIG_EFI_PARTITION
+ p = (struct msdos_partition *) (data + 0x1be);
+ for (slot = 1 ; slot <= 4 ; slot++, p++) {
+ /* If this is an EFI GPT disk, msdos should ignore it. */
+ if (p->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT) {
+ put_dev_sector(sect);
+ return 0;
+ }
+ }
+#endif
+ p = (struct msdos_partition *) (data + 0x1be);
+
+ disksig = le32_to_cpup((__le32 *)(data + 0x1b8));
+
+ /*
+ * 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++) {
+ sector_t start = start_sect(p)*sector_size;
+ sector_t size = nr_sects(p)*sector_size;
+
+ if (!size)
+ continue;
+ if (is_extended_partition(p)) {
+ /*
+ * prevent someone doing mkfs or mkswap on an
+ * extended partition, but leave room for LILO
+ * FIXME: this uses one logical sector for > 512b
+ * sector, although it may not be enough/proper.
+ */
+ sector_t n = 2;
+
+ n = min(size, max(sector_size, n));
+ put_partition(state, slot, start, n);
+
+ strlcat(state->pp_buf, " <", PAGE_SIZE);
+ parse_extended(state, start, size, disksig);
+ strlcat(state->pp_buf, " >", PAGE_SIZE);
+ continue;
+ }
+ put_partition(state, slot, start, size);
+ set_info(state, slot, disksig);
+ if (p->sys_ind == LINUX_RAID_PARTITION)
+ state->parts[slot].flags = ADDPART_FLAG_RAID;
+ if (p->sys_ind == DM6_PARTITION)
+ strlcat(state->pp_buf, "[DM]", PAGE_SIZE);
+ if (p->sys_ind == EZD_PARTITION)
+ strlcat(state->pp_buf, "[EZD]", PAGE_SIZE);
+ }
+
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+
+ /* second pass - output for each on a separate line */
+ p = (struct msdos_partition *) (0x1be + data);
+ for (slot = 1 ; slot <= 4 ; slot++, p++) {
+ unsigned char id = p->sys_ind;
+ 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, start_sect(p) * sector_size,
+ nr_sects(p) * sector_size, slot);
+ }
+ put_dev_sector(sect);
+ return 1;
+}
diff --git a/block/partitions/osf.c b/block/partitions/osf.c
new file mode 100644
index 000000000..84560d076
--- /dev/null
+++ b/block/partitions/osf.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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"
+
+#define MAX_OSF_PARTITIONS 18
+#define DISKLABELMAGIC (0x82564557UL)
+
+int osf_partition(struct parsed_partitions *state)
+{
+ int i;
+ int slot = 1;
+ unsigned int npartitions;
+ 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[MAX_OSF_PARTITIONS];
+ } * label;
+ struct d_partition * partition;
+
+ data = read_part_sector(state, 0, &sect);
+ 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;
+ }
+ npartitions = le16_to_cpu(label->d_npartitions);
+ if (npartitions > MAX_OSF_PARTITIONS) {
+ put_dev_sector(sect);
+ return 0;
+ }
+ for (i = 0 ; i < 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++;
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ put_dev_sector(sect);
+ return 1;
+}
diff --git a/block/partitions/sgi.c b/block/partitions/sgi.c
new file mode 100644
index 000000000..4273f1bb0
--- /dev/null
+++ b/block/partitions/sgi.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/partitions/sgi.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ */
+
+#include "check.h"
+
+#define SGI_LABEL_MAGIC 0x0be5a941
+
+enum {
+ LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
+};
+
+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)
+{
+ 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 = read_part_sector(state, 0, &sect);
+ 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(state->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 = ADDPART_FLAG_RAID;
+ }
+ slot++;
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ put_dev_sector(sect);
+ return 1;
+}
diff --git a/block/partitions/sun.c b/block/partitions/sun.c
new file mode 100644
index 000000000..47dc53ecc
--- /dev/null
+++ b/block/partitions/sun.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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"
+
+#define SUN_LABEL_MAGIC 0xDABE
+#define SUN_VTOC_SANITY 0x600DDEEE
+
+enum {
+ SUN_WHOLE_DISK = 5,
+ LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
+};
+
+int sun_partition(struct parsed_partitions *state)
+{
+ int i;
+ __be16 csum;
+ int slot = 1;
+ __be16 *ush;
+ Sector sect;
+ struct sun_disklabel {
+ unsigned char info[128]; /* Informative text string */
+ struct sun_vtoc {
+ __be32 version; /* Layout version */
+ char volume[8]; /* Volume name */
+ __be16 nparts; /* Number of partitions */
+ struct sun_info { /* Partition hdrs, sec 2 */
+ __be16 id;
+ __be16 flags;
+ } infos[8];
+ __be16 padding; /* Alignment padding */
+ __be32 bootinfo[3]; /* Info needed by mboot */
+ __be32 sanity; /* To verify vtoc sanity */
+ __be32 reserved[10]; /* Free space */
+ __be32 timestamp[8]; /* Partition timestamp */
+ } vtoc;
+ __be32 write_reinstruct; /* sectors to skip, writes */
+ __be32 read_reinstruct; /* sectors to skip, reads */
+ unsigned char spare[148]; /* Padding */
+ __be16 rspeed; /* Disk rotational speed */
+ __be16 pcylcount; /* Physical cylinder count */
+ __be16 sparecyl; /* extra sects per cylinder */
+ __be16 obs1; /* gap1 */
+ __be16 obs2; /* gap2 */
+ __be16 ilfact; /* Interleave factor */
+ __be16 ncyl; /* Data cylinder count */
+ __be16 nacyl; /* Alt. cylinder count */
+ __be16 ntrks; /* Tracks per cylinder */
+ __be16 nsect; /* Sectors per track */
+ __be16 obs3; /* bhead - Label head offset */
+ __be16 obs4; /* ppart - Physical Partition */
+ 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];
+ int use_vtoc;
+ int nparts;
+
+ label = read_part_sector(state, 0, &sect);
+ 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(state->bdev, b));
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ /* Check to see if we can use the VTOC table */
+ use_vtoc = ((be32_to_cpu(label->vtoc.sanity) == SUN_VTOC_SANITY) &&
+ (be32_to_cpu(label->vtoc.version) == 1) &&
+ (be16_to_cpu(label->vtoc.nparts) <= 8));
+
+ /* Use 8 partition entries if not specified in validated VTOC */
+ nparts = (use_vtoc) ? be16_to_cpu(label->vtoc.nparts) : 8;
+
+ /*
+ * So that old Linux-Sun partitions continue to work,
+ * alow the VTOC to be used under the additional condition ...
+ */
+ use_vtoc = use_vtoc || !(label->vtoc.sanity ||
+ label->vtoc.version || label->vtoc.nparts);
+ spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect);
+ for (i = 0; i < nparts; i++, p++) {
+ unsigned long st_sector;
+ unsigned 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);
+ state->parts[slot].flags = 0;
+ if (use_vtoc) {
+ if (be16_to_cpu(label->vtoc.infos[i].id) == LINUX_RAID_PARTITION)
+ state->parts[slot].flags |= ADDPART_FLAG_RAID;
+ else if (be16_to_cpu(label->vtoc.infos[i].id) == SUN_WHOLE_DISK)
+ state->parts[slot].flags |= ADDPART_FLAG_WHOLEDISK;
+ }
+ }
+ slot++;
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ put_dev_sector(sect);
+ return 1;
+}
diff --git a/block/partitions/sysv68.c b/block/partitions/sysv68.c
new file mode 100644
index 000000000..6f6257fd4
--- /dev/null
+++ b/block/partitions/sysv68.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/partitions/sysv68.c
+ *
+ * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
+ */
+
+#include "check.h"
+
+/*
+ * Volume ID structure: on first 256-bytes sector of disk
+ */
+
+struct volumeid {
+ u8 vid_unused[248];
+ u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
+};
+
+/*
+ * config block: second 256-bytes sector on disk
+ */
+
+struct dkconfig {
+ u8 ios_unused0[128];
+ __be32 ios_slcblk; /* Slice table block number */
+ __be16 ios_slccnt; /* Number of entries in slice table */
+ u8 ios_unused1[122];
+};
+
+/*
+ * combined volumeid and dkconfig block
+ */
+
+struct dkblk0 {
+ struct volumeid dk_vid;
+ struct dkconfig dk_ios;
+};
+
+/*
+ * Slice Table Structure
+ */
+
+struct slice {
+ __be32 nblocks; /* slice size (in blocks) */
+ __be32 blkoff; /* block offset of slice */
+};
+
+
+int sysv68_partition(struct parsed_partitions *state)
+{
+ int i, slices;
+ int slot = 1;
+ Sector sect;
+ unsigned char *data;
+ struct dkblk0 *b;
+ struct slice *slice;
+ char tmp[64];
+
+ data = read_part_sector(state, 0, &sect);
+ if (!data)
+ return -1;
+
+ b = (struct dkblk0 *)data;
+ if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
+ put_dev_sector(sect);
+ return 0;
+ }
+ slices = be16_to_cpu(b->dk_ios.ios_slccnt);
+ i = be32_to_cpu(b->dk_ios.ios_slcblk);
+ put_dev_sector(sect);
+
+ data = read_part_sector(state, i, &sect);
+ if (!data)
+ return -1;
+
+ slices -= 1; /* last slice is the whole disk */
+ snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ slice = (struct slice *)data;
+ for (i = 0; i < slices; i++, slice++) {
+ if (slot == state->limit)
+ break;
+ if (be32_to_cpu(slice->nblocks)) {
+ put_partition(state, slot,
+ be32_to_cpu(slice->blkoff),
+ be32_to_cpu(slice->nblocks));
+ snprintf(tmp, sizeof(tmp), "(s%u)", i);
+ strlcat(state->pp_buf, tmp, PAGE_SIZE);
+ }
+ slot++;
+ }
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ put_dev_sector(sect);
+ return 1;
+}
diff --git a/block/partitions/ultrix.c b/block/partitions/ultrix.c
new file mode 100644
index 000000000..4aaa81043
--- /dev/null
+++ b/block/partitions/ultrix.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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)
+{
+ 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_part_sector(state, (16384 - sizeof(*label))/512, &sect);
+ 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);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+ } else {
+ put_dev_sector(sect);
+ return 0;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 00:12:07 +0000