pax_global_header00006660000000000000000000000064142507311470014516gustar00rootroot0000000000000052 comment=8fe492945e3a91d5585b3917a0a7e46bbad66498 make-dynpart-mappings-10.2.4/000077500000000000000000000000001425073114700160125ustar00rootroot00000000000000make-dynpart-mappings-10.2.4/.gitignore000066400000000000000000000000761425073114700200050ustar00rootroot00000000000000make-dynpart-mappings 3rdparty/upstream 3rdparty/upstream.git make-dynpart-mappings-10.2.4/3rdparty/000077500000000000000000000000001425073114700175625ustar00rootroot00000000000000make-dynpart-mappings-10.2.4/3rdparty/metadata_format.h000066400000000000000000000347541425073114700231000ustar00rootroot00000000000000/* * Copyright (C) 2018 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef LOGICAL_PARTITION_METADATA_FORMAT_H_ #define LOGICAL_PARTITION_METADATA_FORMAT_H_ #ifdef __cplusplus #include #include #endif #include #ifdef __cplusplus extern "C" { #endif /* Magic signature for LpMetadataGeometry. */ #define LP_METADATA_GEOMETRY_MAGIC 0x616c4467 /* Space reserved for geometry information. */ #define LP_METADATA_GEOMETRY_SIZE 4096 /* Magic signature for LpMetadataHeader. */ #define LP_METADATA_HEADER_MAGIC 0x414C5030 /* Current metadata version. */ #define LP_METADATA_MAJOR_VERSION 10 #define LP_METADATA_MINOR_VERSION_MIN 0 #define LP_METADATA_MINOR_VERSION_MAX 2 /* Metadata version needed to use the UPDATED partition attribute. */ #define LP_METADATA_VERSION_FOR_UPDATED_ATTR 1 /* Metadata version needed for the new expanded header struct. */ #define LP_METADATA_VERSION_FOR_EXPANDED_HEADER 2 /* Attributes for the LpMetadataPartition::attributes field. * * READONLY - The partition should not be considered writable. When used with * device mapper, the block device will be created as read-only. */ #define LP_PARTITION_ATTR_NONE 0x0 #define LP_PARTITION_ATTR_READONLY (1 << 0) /* This flag is only intended to be used with super_empty.img and super.img on * retrofit devices. On these devices there are A and B super partitions, and * we don't know ahead of time which slot the image will be applied to. * * If set, the partition name needs a slot suffix applied. The slot suffix is * determined by the metadata slot number (0 = _a, 1 = _b). */ #define LP_PARTITION_ATTR_SLOT_SUFFIXED (1 << 1) /* This flag is applied automatically when using MetadataBuilder::NewForUpdate. * It signals that the partition was created (or modified) for a snapshot-based * update. If this flag is not present, the partition was likely flashed via * fastboot. */ #define LP_PARTITION_ATTR_UPDATED (1 << 2) /* This flag marks a partition as disabled. It should not be used or mapped. */ #define LP_PARTITION_ATTR_DISABLED (1 << 3) /* Mask that defines all valid attributes. When changing this, make sure to * update ParseMetadata(). */ #define LP_PARTITION_ATTRIBUTE_MASK_V0 \ (LP_PARTITION_ATTR_READONLY | LP_PARTITION_ATTR_SLOT_SUFFIXED) #define LP_PARTITION_ATTRIBUTE_MASK_V1 (LP_PARTITION_ATTR_UPDATED | LP_PARTITION_ATTR_DISABLED) #define LP_PARTITION_ATTRIBUTE_MASK \ (LP_PARTITION_ATTRIBUTE_MASK_V0 | LP_PARTITION_ATTRIBUTE_MASK_V1) /* Default name of the physical partition that holds logical partition entries. * The layout of this partition will look like: * * +--------------------+ * | Disk Geometry | * +--------------------+ * | Geometry Backup | * +--------------------+ * | Metadata | * +--------------------+ * | Backup Metadata | * +--------------------+ * | Logical Partitions | * +--------------------+ */ #define LP_METADATA_DEFAULT_PARTITION_NAME "super" /* Size of a sector is always 512 bytes for compatibility with the Linux kernel. */ #define LP_SECTOR_SIZE 512 /* Amount of space reserved at the start of every super partition to avoid * creating an accidental boot sector. */ #define LP_PARTITION_RESERVED_BYTES 4096 /* This structure is stored at block 0 in the first 4096 bytes of the * partition, and again in the following block. It is never modified and * describes how logical partition information can be located. */ typedef struct LpMetadataGeometry { /* 0: Magic signature (LP_METADATA_GEOMETRY_MAGIC). */ uint32_t magic; /* 4: Size of the LpMetadataGeometry struct. */ uint32_t struct_size; /* 8: SHA256 checksum of this struct, with this field set to 0. */ uint8_t checksum[32]; /* 40: Maximum amount of space a single copy of the metadata can use. This * must be a multiple of LP_SECTOR_SIZE. */ uint32_t metadata_max_size; /* 44: Number of copies of the metadata to keep. For A/B devices, this * will be 2. For an A/B/C device, it would be 3, et cetera. For Non-A/B * it will be 1. A backup copy of each slot is kept, so if this is "2", * there will be four copies total. */ uint32_t metadata_slot_count; /* 48: Logical block size. This is the minimal alignment for partition and * extent sizes, and it must be a multiple of LP_SECTOR_SIZE. Note that * this must be equal across all LUNs that comprise the super partition, * and thus this field is stored in the geometry, not per-device. */ uint32_t logical_block_size; } __attribute__((packed)) LpMetadataGeometry; /* The logical partition metadata has a number of tables; they are described * in the header via the following structure. * * The size of the table can be computed by multiplying entry_size by * num_entries, and the result must not overflow a 32-bit signed integer. */ typedef struct LpMetadataTableDescriptor { /* 0: Location of the table, relative to end of the metadata header. */ uint32_t offset; /* 4: Number of entries in the table. */ uint32_t num_entries; /* 8: Size of each entry in the table, in bytes. */ uint32_t entry_size; } __attribute__((packed)) LpMetadataTableDescriptor; /* Binary format for the header of the logical partition metadata format. * * The format has three sections. The header must occur first, and the * proceeding tables may be placed in any order after. * * +-----------------------------------------+ * | Header data - fixed size | * +-----------------------------------------+ * | Partition table - variable size | * +-----------------------------------------+ * | Partition table extents - variable size | * +-----------------------------------------+ * * The "Header" portion is described by LpMetadataHeader. It will always * precede the other three blocks. * * All fields are stored in little-endian byte order when serialized. * * This struct is versioned; see the |major_version| and |minor_version| * fields. */ typedef struct LpMetadataHeader { /* 0: Four bytes equal to LP_METADATA_HEADER_MAGIC. */ uint32_t magic; /* 4: Version number required to read this metadata. If the version is not * equal to the library version, the metadata should be considered * incompatible. */ uint16_t major_version; /* 6: Minor version. A library supporting newer features should be able to * read metadata with an older minor version. However, an older library * should not support reading metadata if its minor version is higher. */ uint16_t minor_version; /* 8: The size of this header struct. */ uint32_t header_size; /* 12: SHA256 checksum of the header, up to |header_size| bytes, computed as * if this field were set to 0. */ uint8_t header_checksum[32]; /* 44: The total size of all tables. This size is contiguous; tables may not * have gaps in between, and they immediately follow the header. */ uint32_t tables_size; /* 48: SHA256 checksum of all table contents. */ uint8_t tables_checksum[32]; /* 80: Partition table descriptor. */ LpMetadataTableDescriptor partitions; /* 92: Extent table descriptor. */ LpMetadataTableDescriptor extents; /* 104: Updateable group descriptor. */ LpMetadataTableDescriptor groups; /* 116: Block device table. */ LpMetadataTableDescriptor block_devices; /* Everything past here is header version 1.2+, and is only included if * needed. When liblp supporting >= 1.2 reads a < 1.2 header, it must * zero these additional fields. */ /* 128: See LP_HEADER_FLAG_ constants for possible values. Header flags are * independent of the version number and intended to be informational only. * New flags can be added without bumping the version. */ uint32_t flags; /* 132: Reserved (zero), pad to 256 bytes. */ uint8_t reserved[124]; } __attribute__((packed)) LpMetadataHeader; /* This device uses Virtual A/B. Note that on retrofit devices, the expanded * header may not be present. */ #define LP_HEADER_FLAG_VIRTUAL_AB_DEVICE 0x1 /* This struct defines a logical partition entry, similar to what would be * present in a GUID Partition Table. */ typedef struct LpMetadataPartition { /* 0: Name of this partition in ASCII characters. Any unused characters in * the buffer must be set to 0. Characters may only be alphanumeric or _. * The name must include at least one ASCII character, and it must be unique * across all partition names. The length (36) is the same as the maximum * length of a GPT partition name. */ char name[36]; /* 36: Attributes for the partition (see LP_PARTITION_ATTR_* flags above). */ uint32_t attributes; /* 40: Index of the first extent owned by this partition. The extent will * start at logical sector 0. Gaps between extents are not allowed. */ uint32_t first_extent_index; /* 44: Number of extents in the partition. Every partition must have at * least one extent. */ uint32_t num_extents; /* 48: Group this partition belongs to. */ uint32_t group_index; } __attribute__((packed)) LpMetadataPartition; /* This extent is a dm-linear target, and the index is an index into the * LinearExtent table. */ #define LP_TARGET_TYPE_LINEAR 0 /* This extent is a dm-zero target. The index is ignored and must be 0. */ #define LP_TARGET_TYPE_ZERO 1 /* This struct defines an extent entry in the extent table block. */ typedef struct LpMetadataExtent { /* 0: Length of this extent, in 512-byte sectors. */ uint64_t num_sectors; /* 8: Target type for device-mapper (see LP_TARGET_TYPE_* values). */ uint32_t target_type; /* 12: Contents depends on target_type. * * LINEAR: The sector on the physical partition that this extent maps onto. * ZERO: This field must be 0. */ uint64_t target_data; /* 20: Contents depends on target_type. * * LINEAR: Must be an index into the block devices table. * ZERO: This field must be 0. */ uint32_t target_source; } __attribute__((packed)) LpMetadataExtent; /* This struct defines an entry in the groups table. Each group has a maximum * size, and partitions in a group must not exceed that size. There is always * a "default" group of unlimited size, which is used when not using update * groups or when using overlayfs or fastbootd. */ typedef struct LpMetadataPartitionGroup { /* 0: Name of this group. Any unused characters must be 0. */ char name[36]; /* 36: Flags (see LP_GROUP_*). */ uint32_t flags; /* 40: Maximum size in bytes. If 0, the group has no maximum size. */ uint64_t maximum_size; } __attribute__((packed)) LpMetadataPartitionGroup; /* This flag is only intended to be used with super_empty.img and super.img on * retrofit devices. If set, the group needs a slot suffix to be interpreted * correctly. The suffix is automatically applied by ReadMetadata(). */ #define LP_GROUP_SLOT_SUFFIXED (1 << 0) /* This struct defines an entry in the block_devices table. There must be at * least one device, and the first device must represent the partition holding * the super metadata. */ typedef struct LpMetadataBlockDevice { /* 0: First usable sector for allocating logical partitions. this will be * the first sector after the initial geometry blocks, followed by the * space consumed by metadata_max_size*metadata_slot_count*2. */ uint64_t first_logical_sector; /* 8: Alignment for defining partitions or partition extents. For example, * an alignment of 1MiB will require that all partitions have a size evenly * divisible by 1MiB, and that the smallest unit the partition can grow by * is 1MiB. * * Alignment is normally determined at runtime when growing or adding * partitions. If for some reason the alignment cannot be determined, then * this predefined alignment in the geometry is used instead. By default * it is set to 1MiB. */ uint32_t alignment; /* 12: Alignment offset for "stacked" devices. For example, if the "super" * partition itself is not aligned within the parent block device's * partition table, then we adjust for this in deciding where to place * |first_logical_sector|. * * Similar to |alignment|, this will be derived from the operating system. * If it cannot be determined, it is assumed to be 0. */ uint32_t alignment_offset; /* 16: Block device size, as specified when the metadata was created. This * can be used to verify the geometry against a target device. */ uint64_t size; /* 24: Partition name in the GPT. Any unused characters must be 0. */ char partition_name[36]; /* 60: Flags (see LP_BLOCK_DEVICE_* flags below). */ uint32_t flags; } __attribute__((packed)) LpMetadataBlockDevice; /* This flag is only intended to be used with super_empty.img and super.img on * retrofit devices. On these devices there are A and B super partitions, and * we don't know ahead of time which slot the image will be applied to. * * If set, the block device needs a slot suffix applied before being used with * IPartitionOpener. The slot suffix is determined by the metadata slot number * (0 = _a, 1 = _b). */ #define LP_BLOCK_DEVICE_SLOT_SUFFIXED (1 << 0) /* For ease of writing compatibility checks, the original metadata header is * preserved below, and typedefs are provided for the current version. */ typedef struct LpMetadataHeaderV1_0 { uint32_t magic; uint16_t major_version; uint16_t minor_version; uint32_t header_size; uint8_t header_checksum[32]; uint32_t tables_size; uint8_t tables_checksum[32]; LpMetadataTableDescriptor partitions; LpMetadataTableDescriptor extents; LpMetadataTableDescriptor groups; LpMetadataTableDescriptor block_devices; } __attribute__((packed)) LpMetadataHeaderV1_0; typedef LpMetadataHeader LpMetadataHeaderV1_2; #ifdef __cplusplus } /* extern "C" */ #endif #endif /* LOGICAL_PARTITION_METADATA_FORMAT_H_ */ make-dynpart-mappings-10.2.4/LICENSE000066400000000000000000001045151425073114700170250ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. 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But first, please read . make-dynpart-mappings-10.2.4/Makefile000066400000000000000000000014521425073114700174540ustar00rootroot00000000000000CC = $(CROSS_COMPILE)gcc PKG_CONFIG = pkg-config CFLAGS = LDFLAGS = devmapper-CFLAGS = $(shell $(PKG_CONFIG) --cflags devmapper) devmapper-LDFLAGS = $(shell $(PKG_CONFIG) --libs devmapper) libmd-CFLAGS = $(shell $(PKG_CONFIG) --cflags libmd) libmd-LDFLAGS = $(shell $(PKG_CONFIG) --libs libmd) blkid-CFLAGS = $(shell $(PKG_CONFIG) --cflags blkid) blkid-LDFLAGS = $(shell $(PKG_CONFIG) --libs blkid) CONFIG_DEFS := ifeq ($(USERSPACE), 1) CONFIG_DEFS += -DUSERSPACE endif .PHONY += all all: make-dynpart-mappings clean: rm -f make-dynpart-mappings make-dynpart-mappings: main.c 3rdparty/metadata_format.h $(CC) -o make-dynpart-mappings main.c $(CFLAGS) $(LDFLAGS) $(CONFIG_DEFS) $(devmapper-CFLAGS) $(devmapper-LDFLAGS) $(libmd-CFLAGS) $(libmd-LDFLAGS) $(blkid-CFLAGS) $(blkid-LDFLAGS) -I3rdparty make-dynpart-mappings-10.2.4/README.md000066400000000000000000000014631425073114700172750ustar00rootroot00000000000000# make-dynpart-mappings This is a short program that sets up Android dynamic partitions. It was created for postmarketOS so that it can use dynamic partitions without pulling too many dependencies. This is not a complete substitute for fs\_mgr (*yet*). It doesn't have any options either and accepts one argument. ## Compiling You can build this program using make: $ make ## License This program as a whole is licensed under the GNU GPLv3. It also includes some 3rd party code in the folder `3rdparty/`, licensed under the Apache license, version 2.0. ## 3rd Party Code The 3rd party code used to define the format of the dynamic partitions can be found [here](https://android.googlesource.com/platform/system/core/+/8edafa239369ea6956d719dbf60b4ce36f9e42e9/fs_mgr/liblp/include/liblp/metadata_format.h). make-dynpart-mappings-10.2.4/main.c000066400000000000000000000262771425073114700171200ustar00rootroot00000000000000// SPDX-License-Identifier: GPL-3.0-only #include #include #include #include #include #include #include #include #include #include #include #include #include "metadata_format.h" #define LINEAR_PARAMS_SIZE 256 static const uint8_t zero[32] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }; /* * Part 1: * * The following functions are for struct validation. They do simple * comparisons and checksums. If they fail, they output an error and * return NULL. They take the struct as a parameter, and sometimes a * scope (TODO: improve the error messages). */ LpMetadataGeometry *validateMetadataGeometry(LpMetadataGeometry *geom, const char *scope) { SHA2_CTX sha2; uint8_t checksum[SHA256_DIGEST_LENGTH]; if (le32toh(geom->magic) != LP_METADATA_GEOMETRY_MAGIC) { fprintf(stderr, "%s: Invalid metadata geometry magic number (expected 0x%X, got 0x%X)\n", scope, LP_METADATA_GEOMETRY_MAGIC, le32toh(geom->magic)); return NULL; } if (le32toh(geom->struct_size) != sizeof(LpMetadataGeometry)) { fprintf(stderr, "%s: Invalid geometry size\n", scope); return NULL; } // Calculate the checksum if the checksum field was zero SHA256Init(&sha2); SHA256Update(&sha2, (const uint8_t *) geom, offsetof(LpMetadataGeometry, checksum)); SHA256Update(&sha2, zero, 32); SHA256Update(&sha2, &geom->checksum[32], geom->struct_size - offsetof(LpMetadataGeometry, checksum) - 32); SHA256Final(checksum, &sha2); if (memcmp(checksum, geom->checksum, SHA256_DIGEST_LENGTH)) { fprintf(stderr, "%s: Metadata geometry integrity check failed\n", scope); return NULL; } if (le32toh(geom->metadata_max_size) % LP_SECTOR_SIZE) { fprintf(stderr, "%s: Invalid metadata header maximum size\n", scope); return NULL; } if (le32toh(geom->metadata_slot_count) > 3 || le32toh(geom->metadata_slot_count) < 1) { fprintf(stderr, "%s: Unknown number of slots %u\n", scope, le32toh(geom->metadata_slot_count)); return NULL; } return geom; } LpMetadataHeader *validateMetadataHeader(LpMetadataHeader *header, const char *scope) { SHA2_CTX sha2; uint8_t checksum[SHA256_DIGEST_LENGTH]; if (le32toh(header->magic) != LP_METADATA_HEADER_MAGIC) { fprintf(stderr, "%s: Invalid magic number for the metadata header (expected 0x%X, got 0x%X)\n", scope, LP_METADATA_HEADER_MAGIC, le32toh(header->magic)); return NULL; } if (le32toh(header->major_version) != LP_METADATA_MAJOR_VERSION || le32toh(header->minor_version) < LP_METADATA_MINOR_VERSION_MIN || le32toh(header->minor_version) > LP_METADATA_MINOR_VERSION_MAX) { fprintf(stderr, "%s: Unsupported header version %u.%u\n", scope, le32toh(header->major_version), le32toh(header->minor_version)); return NULL; } if (le32toh(header->minor_version) == 0 && le32toh(header->header_size) != sizeof(LpMetadataHeaderV1_0)) { fprintf(stderr, "%s: Invalid size for metadata header v10.0\n", scope); return NULL; } if (le32toh(header->minor_version) == 2 && le32toh(header->header_size) != sizeof(LpMetadataHeaderV1_2)) { fprintf(stderr, "%s: Invalid size for metadata header v10.2\n", scope); return NULL; } // Calculate the checksum if the checksum field was zero SHA256Init(&sha2); SHA256Update(&sha2, (const uint8_t *) header, offsetof(LpMetadataHeader, header_checksum)); SHA256Update(&sha2, zero, 32); SHA256Update(&sha2, &header->header_checksum[32], header->header_size - offsetof(LpMetadataHeader, header_checksum) - 32); SHA256Final(checksum, &sha2); if (memcmp(checksum, header->header_checksum, SHA256_DIGEST_LENGTH)) { fprintf(stderr, "%s: Metadata header integrity check failed\n", scope); return NULL; } if (le32toh(header->tables_size) != le32toh(header->partitions.entry_size) * le32toh(header->partitions.num_entries) + le32toh(header->extents.entry_size) * le32toh(header->extents.num_entries) + le32toh(header->groups.entry_size) * le32toh(header->groups.num_entries) + le32toh(header->block_devices.entry_size) * le32toh(header->block_devices.num_entries)) { fprintf(stderr, "%s: Invalid metadata tables size\n", scope); return NULL; } SHA256Init(&sha2); SHA256Update(&sha2, (const void *) &((const uint8_t *) header)[le32toh(header->header_size)], le32toh(header->tables_size)); SHA256Final(checksum, &sha2); if (memcmp(checksum, header->tables_checksum, SHA256_DIGEST_LENGTH)) { fprintf(stderr, "%s: Metadata tables integrity check failed\n", scope); return NULL; } return header; } /* * Part 2: * * This function takes in an array of block devices (blockDevs) and * resolves them according to their partition label, storing the * results in blockDevicePaths. It is sometimes necessary to * append/suffix the slot identifier (slotId). * * The resulting strings are newly allocated by libblkid, and should be * freed. */ void resolveBlockDevices(const LpMetadataBlockDevice *blockDevs, char **blockDevicePaths, uint32_t blockDeviceCount, const char *slotId) { char buf[39]; for (int i = 0; i < blockDeviceCount; i++) { // Prevent out of bounds memory access when concatenating strings strncpy(buf, blockDevs[i].partition_name, 36); buf[37] = '\0'; if (le32toh(blockDevs[i].flags) & LP_BLOCK_DEVICE_SLOT_SUFFIXED) strcat(buf, slotId); blockDevicePaths[i] = blkid_evaluate_tag("PARTLABEL", buf, NULL); } } /* * Part 3: * * These functions do the actual mapping. They take in the partitions * extents they reference, and block devices which they use, and pass * the partitions to the device mapper. The functions are separate to * avoid excessive indentation. * * There are some error messages here for when the mappings cannot be * made. */ uint64_t addExtentAsTarget(struct dm_task *dmt, LpMetadataExtent *extent, uint32_t sector, const char **blockDevices, const char *scope) { char buf[LINEAR_PARAMS_SIZE]; if (le32toh(extent->target_type) == LP_TARGET_TYPE_LINEAR && blockDevices[le32toh(extent->target_source)]) { snprintf(buf, LINEAR_PARAMS_SIZE, "%s %u", blockDevices[le32toh(extent->target_source)], le64toh(extent->target_data)); dm_task_add_target(dmt, sector, le64toh(extent->num_sectors), "linear", buf); } else if (le32toh(extent->target_type) == LP_TARGET_TYPE_ZERO) dm_task_add_target(dmt, sector, le64toh(extent->num_sectors), "zero", ""); else { if (le32toh(extent->target_type) == LP_TARGET_TYPE_LINEAR) fprintf(stderr, "%s: Unresolved block device, punching hole\n", scope); else fprintf(stderr, "%s: Unknown device mapper entry type %u, punching hole\n", scope, le32toh(extent->target_source)); dm_task_add_target(dmt, sector, le64toh(extent->num_sectors), "error", ""); } return le64toh(extent->num_sectors); } void writeMappingsFromMetadata(LpMetadataHeader *header, LpMetadataPartition *parts, LpMetadataExtent *extents, const char **blockDevices, const char *slotId) { uint32_t sector; struct dm_task *dmt; char buf[39]; for (uint32_t i = 0; i < le32toh(header->partitions.num_entries); i++) { // Extent index bounds check if (le32toh(parts[i].first_extent_index) + le32toh(parts[i].num_extents) > le32toh(header->extents.num_entries)) { fprintf(stderr, "%.36s%s: partition extents extend past the extent table\n", parts[i].name, slotId); break; } dmt = dm_task_create(DM_DEVICE_CREATE); // Prevent out of bounds memory access when concatenating strings strncpy(buf, parts[i].name, 36); buf[37] = '\0'; if (parts[i].attributes & LP_PARTITION_ATTR_SLOT_SUFFIXED) strcat(buf, slotId); dm_task_set_name(dmt, buf); sector = 0; for (uint32_t j = 0; j < le32toh(parts[i].num_extents); j++) sector += addExtentAsTarget(dmt, &extents[j + le32toh(parts[i].first_extent_index)], sector, blockDevices, buf); dm_task_run(dmt); dm_task_destroy(dmt); } } int main(int argc, char **argv) { const char *superPartition; int fd; LpMetadataGeometry *geom; LpMetadataHeader *header; LpMetadataPartition *parts; LpMetadataExtent *extents; LpMetadataBlockDevice *physPart; char **blockDevicePaths; int slotN = 0; static const char *slotIds[] = { "_a", "_b", "_c" }; if (argc < 2) { fprintf(stderr, "Usage: %s SUPER_PARTITION [SLOT_NUMBER [BLOCK_DEVICES]]\n", argv[0]); return 1; } superPartition = blkid_evaluate_spec(argv[1], NULL); if (!superPartition) { fprintf(stderr, "Could not find block device \"%s\"\n", argv[1]); return 1; } fd = open(superPartition, O_RDONLY); if (fd == -1) { fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno)); return 1; } if (argc >= 3) slotN = strtol(argv[2], NULL, 0); geom = malloc(LP_METADATA_GEOMETRY_SIZE * 2); // Seek to the beginning of the metadata lseek(fd, LP_PARTITION_RESERVED_BYTES, SEEK_SET); // Find first valid geometry struct read(fd, geom, LP_METADATA_GEOMETRY_SIZE); if (validateMetadataGeometry(geom, argv[1])) lseek(fd, LP_METADATA_GEOMETRY_SIZE, SEEK_CUR); else read(fd, geom, LP_METADATA_GEOMETRY_SIZE); if (validateMetadataGeometry(geom, argv[1]) == NULL) { fprintf(stderr, "No valid metadata geometry found\n"); return 1; } header = malloc(le32toh(geom->metadata_max_size)); // Skip the main and backup metadata of each slot before the requested one lseek(fd, le32toh(geom->metadata_max_size) * slotN * 2, SEEK_CUR); for (uint32_t i = slotN; i < le32toh(geom->metadata_slot_count); i++) { // Find the first valid metadata header struct read(fd, header, le32toh(geom->metadata_max_size)); if (validateMetadataHeader(header, argv[1])) lseek(fd, le32toh(geom->metadata_max_size), SEEK_CUR); else read(fd, header, le32toh(geom->metadata_max_size)); if (validateMetadataHeader(header, argv[1]) == NULL) { fprintf(stderr, "No valid metadata header found\n"); goto next; } parts = (LpMetadataPartition *) &((uint8_t *) header)[le32toh(header->header_size) + le32toh(header->partitions.offset)]; extents = (LpMetadataExtent *) &((uint8_t *) header)[le32toh(header->header_size) + le32toh(header->extents.offset)]; physPart = (LpMetadataBlockDevice *) &((uint8_t *) header)[le32toh(header->header_size) + le32toh(header->block_devices.offset)]; #ifdef USERSPACE blockDevicePaths = calloc(le32toh(header->block_devices.num_entries), sizeof(char *)); blockDevicePaths[0] = superPartition; for (int j = 1; j + 2 < argc && j < le32toh(header->block_devices.num_entries); j++) blockDevicePaths[j] = argv[j + 2]; #else blockDevicePaths = malloc(sizeof(char *) * le32toh(header->block_devices.num_entries)); resolveBlockDevices(physPart, blockDevicePaths, le32toh(header->block_devices.num_entries), slotIds[i]); #endif writeMappingsFromMetadata(header, parts, extents, (const char **) blockDevicePaths, slotIds[i]); #ifndef USERSPACE for (int j = 0; j < le32toh(header->block_devices.num_entries); j++) free(blockDevicePaths[j]); #endif free(blockDevicePaths); next: // If the user specified a slot, then only that slot should be processed if (argc >= 3) break; // Fix for google-sargo (it has 2 super partitions, each with 2 slots with the same logical partitions) if (!(le32toh(physPart->flags) & LP_BLOCK_DEVICE_SLOT_SUFFIXED)) { fprintf(stderr, "warn: This looks like metadata for retrofit partitions. Only the first slot is mapped.\n"); break; } } free(header); free(geom); free(superPartition); return 0; } make-dynpart-mappings-10.2.4/maintainance.sh000077500000000000000000000017031425073114700210010ustar00rootroot00000000000000#!/bin/sh # Go into the source directory (location of this file) cd "$(dirname $0)" # Initial setup if [ ! -e 3rdparty/upstream/fs_mgr/liblp/include/liblp/metadata_format.h ] then git clone --separate-git-dir=3rdparty/upstream.git --config core.worktree=../upstream https://android.googlesource.com/platform/system/core.git 3rdparty/upstream fi git --git-dir=3rdparty/upstream.git pull find 3rdparty/upstream \ ! -path 3rdparty/upstream \ ! -path 3rdparty/upstream/fs_mgr \ ! -path 3rdparty/upstream/fs_mgr/liblp \ ! -path 3rdparty/upstream/fs_mgr/liblp/include \ ! -path 3rdparty/upstream/fs_mgr/liblp/include/liblp \ ! -path 3rdparty/upstream/fs_mgr/liblp/include/liblp/metadata_format.h \ -delete if ! diff -u 3rdparty/metadata_format.h 3rdparty/upstream/fs_mgr/liblp/include/liblp/metadata_format.h then cp 3rdparty/upstream/fs_mgr/liblp/include/liblp/metadata_format.h 3rdparty/metadata_format.h echo Metadata format changed, please review fi