diff options
Diffstat (limited to 'fastbootd/commands/partitions.c')
| -rw-r--r-- | fastbootd/commands/partitions.c | 772 |
1 files changed, 0 insertions, 772 deletions
diff --git a/fastbootd/commands/partitions.c b/fastbootd/commands/partitions.c deleted file mode 100644 index 74232e6..0000000 --- a/fastbootd/commands/partitions.c +++ /dev/null @@ -1,772 +0,0 @@ -/* - * Copyright (c) 2009-2013, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google, Inc. nor the names of its contributors - * may be used to endorse or promote products derived from this - * software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <sys/mman.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> -#include <endian.h> -#include <zlib.h> -#include <linux/hdreg.h> -#include <sys/ioctl.h> -#include <stdlib.h> -#include <cutils/config_utils.h> -#include <inttypes.h> - -#include "partitions.h" -#include "debug.h" -#include "utils.h" -#include "protocol.h" - -#define BLKRRPART _IO(0x12,95) /* re-read partition table */ -#define BLKSSZGET _IO(0x12,104) - -#define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) -#define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) -#define ALIGN_DOWN(x, y) ((y) * ((x) / (y))) - - -const uint8_t partition_type_uuid[16] = { - 0xa2, 0xa0, 0xd0, 0xeb, 0xe5, 0xb9, 0x33, 0x44, - 0x87, 0xc0, 0x68, 0xb6, 0xb7, 0x26, 0x99, 0xc7, -}; - -//TODO: There is assumption that we are using little endian - -static void GPT_entry_clear(struct GPT_entry_raw *entry) -{ - memset(entry, 0, sizeof(*entry)); -} - -/* - * returns mapped location to choosen area - * mapped_ptr is pointer to whole area mapped (it can be bigger then requested) - */ -int gpt_mmap(struct GPT_mapping *mapping, uint64_t location, int size, int fd) -{ - unsigned int location_diff = location & ~PAGE_MASK; - - mapping->size = ALIGN(size + location_diff, PAGE_SIZE); - - uint64_t sz = get_file_size64(fd); - if (sz < size + location) { - D(ERR, "the location of mapping area is outside of the device size %" PRId64, sz); - return 1; - } - location = ALIGN_DOWN(location, PAGE_SIZE); - - mapping->map_ptr = mmap64(NULL, mapping->size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, location); - - if (mapping->map_ptr == MAP_FAILED) { - mapping->ptr = MAP_FAILED; - D(ERR, "map failed: %s", strerror(errno)); - return 1; - } - - mapping->ptr = (void *)((char *) mapping->map_ptr + location_diff); - return 0; -} - -void gpt_unmap(struct GPT_mapping *mapping) { - munmap(mapping->map_ptr, mapping->size); -} - - -#define LBA_ADDR(table, value) ((uint64_t) (table)->sector_size * (value)) - -int GPT_map_from_content(struct GPT_entry_table *table, const struct GPT_content *content) -{ - - // Mapping header - if (gpt_mmap(&table->header_map, LBA_ADDR(table, content->header.current_lba), - table->sector_size, table->fd)) { - D(ERR, "unable to map header:%s\n", strerror(errno)); - goto error_header; - } - - table->header = (struct GPT_header *) table->header_map.ptr; - - table->partition_table_size = ROUND_UP(content->header.entries_count * sizeof(*table->entries), - table->sector_size); - - // Mapping entry table - if (gpt_mmap(&table->entries_map, LBA_ADDR(table, content->header.entries_lba), - table->partition_table_size, table->fd)) { - D(ERR, "unable to map entries"); - goto error_signature; - } - - table->entries = (struct GPT_entry_raw *) table->entries_map.ptr; - - // Mapping secondary header - if (gpt_mmap(&table->sec_header_map, LBA_ADDR(table, content->header.backup_lba), - table->sector_size, table->fd)) { - D(ERR, "unable to map backup gpt header"); - goto error_sec_header; - } - - // Mapping secondary entries table - if (gpt_mmap(&table->sec_entries_map, - LBA_ADDR(table, content->header.backup_lba) - table->partition_table_size, - table->partition_table_size, table->fd)) { - D(ERR, "unable to map secondary gpt table"); - goto error_sec_entries; - } - - table->second_header = (struct GPT_header *) table->sec_header_map.ptr; - table->second_entries = (struct GPT_entry_raw *) table->sec_entries_map.ptr; - table->second_valid = strcmp("EFI PART", (char *) table->second_header->signature) == 0; - - return 0; - -error_sec_entries: - gpt_unmap(&table->sec_header_map); -error_sec_header: - gpt_unmap(&table->entries_map); -error_signature: - gpt_unmap(&table->header_map); -error_header: - return 1; -} - -int GPT_map(struct GPT_entry_table *table, unsigned header_lba) -{ - struct GPT_content content; - struct GPT_mapping mapping; - struct GPT_header *header; - - if (gpt_mmap(&mapping, LBA_ADDR(table, header_lba), table->sector_size, table->fd)) { - D(ERR, "unable to map header: %s", strerror(errno)); - goto error_header; - } - - header = (struct GPT_header *) mapping.ptr; - - if (strcmp("EFI PART", (char *) header->signature)) { - D(ERR, "GPT entry not valid"); - goto error_signature; - } - - content.header = *header; - - gpt_unmap(&mapping); - - return GPT_map_from_content(table, &content); - -error_signature: - gpt_unmap(&table->header_map); -error_header: - return 1; -} - -struct GPT_entry_table* GPT_get_device(const char *path, unsigned header_lba) -{ - struct GPT_entry_table *table; - size_t sector_bytes; - - table = (struct GPT_entry_table *) malloc(sizeof(*table)); - table->fd = open(path, O_RDWR); - - if (table->fd < 0) { - D(ERR, "unable to open file %s:%s\n", path, strerror(errno)); - return NULL; - } - - if (!ioctl(table->fd, BLKSSZGET, §or_bytes)) { - table->sector_size = (unsigned) sector_bytes; - D(INFO, "Got sector size %d", table->sector_size); - } else { - D(WARN, "unable to get sector size, assuming 512"); - table->sector_size = 512; - } - - if (GPT_map(table, header_lba)) { - D(ERR, "Could not map gpt"); - return NULL; - } - - return table; -} - -static struct GPT_entry_table* GPT_get_from_content(const char *path, const struct GPT_content *content) -{ - struct GPT_entry_table *table; - size_t sector_bytes; - - table = (struct GPT_entry_table *) malloc(sizeof(*table)); - table->fd = open(path, O_RDWR); - - if (table->fd < 0) { - D(ERR, "unable to open file %s:%s\n", path, strerror(errno)); - return NULL; - } - - if (!ioctl(table->fd, BLKSSZGET, §or_bytes)) { - table->sector_size = (unsigned) sector_bytes; - D(INFO, "Got sector size %d", table->sector_size); - } else { - D(WARN, "unable to get sector size %s, assuming 512", strerror(errno)); - table->sector_size = 512; - } - - if (GPT_map_from_content(table, content)) { - D(ERR, "Could not map gpt"); - return NULL; - } - - return table; -} - - -void GPT_release_device(struct GPT_entry_table *table) -{ - gpt_unmap(&table->header_map); - gpt_unmap(&table->entries_map); - gpt_unmap(&table->sec_header_map); - gpt_unmap(&table->sec_entries_map); - close(table->fd); - free(table); -} - -static int GPT_check_overlap(struct GPT_entry_table *table, struct GPT_entry_raw *entry); -static int GPT_check_overlap_except(struct GPT_entry_table *table, - struct GPT_entry_raw *entry, - struct GPT_entry_raw *exclude); - -void GPT_edit_entry(struct GPT_entry_table *table, - struct GPT_entry_raw *old_entry, - struct GPT_entry_raw *new_entry) -{ - struct GPT_entry_raw *current_entry = GPT_get_pointer(table, old_entry); - - if (GPT_check_overlap_except(table, new_entry, current_entry)) { - D(ERR, "Couldn't add overlaping partition"); - return; - } - - if (current_entry == NULL) { - D(ERR, "Couldn't find entry"); - return; - } - - *current_entry = *new_entry; -} - -int GPT_delete_entry(struct GPT_entry_table *table, struct GPT_entry_raw *entry) -{ - struct GPT_entry_raw *raw = GPT_get_pointer(table, entry); - - if (raw == NULL) { - D(ERR, "could not find entry"); - return 1; - } - D(DEBUG, "Deleting gpt entry '%s'\n", raw->partition_guid); - - // Entry in the middle of table may become empty - GPT_entry_clear(raw); - - return 0; -} - -void GPT_add_entry(struct GPT_entry_table *table, struct GPT_entry_raw *entry) -{ - unsigned i; - int inserted = 0; - if (GPT_check_overlap(table, entry)) { - D(ERR, "Couldn't add overlaping partition"); - return; - } - - if (GPT_get_pointer(table, entry) != NULL) { - D(WARN, "Add entry fault, this entry already exists"); - return; - } - - struct GPT_entry_raw *entries = table->entries; - - for (i = 0; i < table->header->entries_count; ++i) { - if (!entries[i].type_guid[0]) { - inserted = 1; - D(DEBUG, "inserting"); - memcpy(&entries[i], entry, sizeof(entries[i])); - break; - } - } - - if (!inserted) { - D(ERR, "Unable to find empty partion entry"); - } -} - -struct GPT_entry_raw *GPT_get_pointer_by_UTFname(struct GPT_entry_table *table, const uint16_t *name); - -struct GPT_entry_raw *GPT_get_pointer(struct GPT_entry_table *table, struct GPT_entry_raw *entry) -{ - if (entry->partition_guid[0] != 0) - return GPT_get_pointer_by_guid(table, (const char *) entry->partition_guid); - else if (entry->name[0] != 0) - return GPT_get_pointer_by_UTFname(table, entry->name); - - D(WARN, "Name or guid needed to find entry"); - return NULL; -} - -struct GPT_entry_raw *GPT_get_pointer_by_guid(struct GPT_entry_table *table, const char *name) -{ - int current = (int) table->header->entries_count; - - for (current = current - 1; current >= 0; --current) { - if (strncmp((char *) name, - (char *) table->entries[current].partition_guid, 16) == 0) { - return &table->entries[current]; - } - } - - return NULL; -} - -int strncmp_UTF16_char(const uint16_t *s1, const char *s2, size_t n) -{ - if (n == 0) - return (0); - do { - if (((*s1) & 127) != *s2++) - return (((unsigned char) ((*s1) & 127)) - *(unsigned char *)--s2); - if (*s1++ == 0) - break; - } while (--n != 0); - return (0); -} - -int strncmp_UTF16(const uint16_t *s1, const uint16_t *s2, size_t n) -{ - if (n == 0) - return (0); - do { - if ((*s1) != *s2++) - return (*s1 - *--s2); - if (*s1++ == 0) - break; - } while (--n != 0); - return (0); -} - -struct GPT_entry_raw *GPT_get_pointer_by_name(struct GPT_entry_table *table, const char *name) -{ - int count = (int) table->header->entries_count; - int current; - - for (current = 0; current < count; ++current) { - if (strncmp_UTF16_char(table->entries[current].name, - (char *) name, 16) == 0) { - return &table->entries[current]; - } - } - - return NULL; -} - -struct GPT_entry_raw *GPT_get_pointer_by_UTFname(struct GPT_entry_table *table, const uint16_t *name) -{ - int count = (int) table->header->entries_count; - int current; - - for (current = 0; current < count; ++current) { - if (strncmp_UTF16(table->entries[current].name, - name, GPT_NAMELEN) == 0) { - return &table->entries[current]; - } - } - - return NULL; -} - -void GPT_sync(struct GPT_entry_table *table) -{ - uint32_t crc; - - //calculate crc32 - crc = crc32(0, Z_NULL, 0); - crc = crc32(crc, (void*) table->entries, table->header->entries_count * sizeof(*table->entries)); - table->header->partition_array_checksum = crc; - - table->header->header_checksum = 0; - crc = crc32(0, Z_NULL, 0); - crc = crc32(crc, (void*) table->header, table->header->header_size); - table->header->header_checksum = crc; - - //sync secondary partion - if (table->second_valid) { - memcpy((void *)table->second_entries, (void *) table->entries, table->partition_table_size); - memcpy((void *)table->second_header, (void *)table->header, sizeof(*table->header)); - } - - if(!ioctl(table->fd, BLKRRPART, NULL)) { - D(WARN, "Unable to force kernel to refresh partition table"); - } -} - -void GPT_to_UTF16(uint16_t *to, const char *from, int n) -{ - int i; - for (i = 0; i < (n - 1) && (to[i] = from[i]) != '\0'; ++i); - to[i] = '\0'; -} - -void GPT_from_UTF16(char *to, const uint16_t *from, int n) -{ - int i; - for (i = 0; i < (n - 1) && (to[i] = from[i] & 127) != '\0'; ++i); - to[i] = '\0'; -} - -static int GPT_check_overlap_except(struct GPT_entry_table *table, - struct GPT_entry_raw *entry, - struct GPT_entry_raw *exclude) { - int current = (int) table->header->entries_count; - int dontcheck; - struct GPT_entry_raw *current_entry; - if (entry->last_lba < entry->first_lba) { - D(WARN, "Start address have to be less than end address"); - return 1; - } - - for (current = current - 1; current >= 0; --current) { - current_entry = &table->entries[current]; - dontcheck = strncmp((char *) entry->partition_guid, - (char *) current_entry->partition_guid , 16) == 0; - dontcheck |= current_entry->type_guid[0] == 0; - dontcheck |= current_entry == exclude; - - if (!dontcheck && ((entry->last_lba >= current_entry->first_lba && - entry->first_lba < current_entry->last_lba ))) { - return 1; - } - } - - return 0; -} - -static int GPT_check_overlap(struct GPT_entry_table *table, struct GPT_entry_raw *entry) -{ - return GPT_check_overlap_except(table, entry, NULL); -} - -static char *get_key_value(char *ptr, char **key, char **value) -{ - *key = ptr; - ptr = strchr(ptr, '='); - - if (ptr == NULL) - return NULL; - - *ptr++ = '\0'; - *value = ptr; - ptr = strchr(ptr, ';'); - - if (ptr == NULL) - ptr = *value + strlen(*value); - else - *ptr = '\0'; - - *key = strip(*key); - *value = strip(*value); - - return ptr; -} - -//TODO: little endian? -static int add_key_value(const char *key, const char *value, struct GPT_entry_raw *entry) -{ - char *endptr; - if (!strcmp(key, "type")) { - strncpy((char *) entry->type_guid, value, 16); - entry->type_guid[15] = 0; - } - else if (!strcmp(key, "guid")) { - strncpy((char *) entry->partition_guid, value, 16); - entry->type_guid[15] = 0; - } - else if (!strcmp(key, "firstlba")) { - entry->first_lba = strtoul(value, &endptr, 10); - if (*endptr != '\0') goto error; - } - else if (!strcmp(key, "lastlba")) { - entry->last_lba = strtoul(value, &endptr, 10); - if (*endptr != '\0') goto error; - } - else if (!strcmp(key, "flags")) { - entry->flags = strtoul(value, &endptr, 16); - if (*endptr != '\0') goto error; - } - else if (!strcmp(key, "name")) { - GPT_to_UTF16(entry->name, value, GPT_NAMELEN); - } - else { - goto error; - } - - return 0; - -error: - D(ERR, "Could not find key or parse value: %s,%s", key, value); - return 1; -} - -int GPT_parse_entry(char *string, struct GPT_entry_raw *entry) -{ - char *ptr = string; - char *key, *value; - - while ((ptr = get_key_value(ptr, &key, &value)) != NULL) { - if (add_key_value(key, value, entry)) { - D(WARN, "key or value not valid: %s %s", key, value); - return 1; - } - } - - return 0; -} - -void entry_set_guid(int n, uint8_t *guid) -{ - int fd; - fd = open("/dev/urandom", O_RDONLY); - read(fd, guid, 16); - close(fd); - - //rfc4122 - guid[8] = (guid[8] & 0x3F) | 0x80; - guid[7] = (guid[7] & 0x0F) | 0x40; -} - -void GPT_default_content(struct GPT_content *content, struct GPT_entry_table *table) -{ - if (table != NULL) { - memcpy(&content->header, table->header, sizeof(content->header)); - content->header.header_size = sizeof(content->header); - content->header.entry_size = sizeof(struct GPT_entry_raw); - } - else { - D(WARN, "Could not locate old gpt table, using default values"); - memset(&content->header, 0, sizeof(content->header) / sizeof(int)); - content->header = (struct GPT_header) { - .revision = 0x10000, - .header_size = sizeof(content->header), - .header_checksum = 0, - .reserved_zeros = 0, - .current_lba = 1, - .backup_lba = 1, - .entry_size = sizeof(struct GPT_entry_raw), - .partition_array_checksum = 0 - }; - strncpy((char *)content->header.signature, "EFI PART", 8); - strncpy((char *)content->header.disk_guid, "ANDROID MMC DISK", 16); - } -} - -static int get_config_uint64(cnode *node, uint64_t *ptr, const char *name) -{ - const char *tmp; - uint64_t val; - char *endptr; - if ((tmp = config_str(node, name, NULL))) { - val = strtoull(tmp, &endptr, 10); - if (*endptr != '\0') { - D(WARN, "Value for %s is not a number: %s", name, tmp); - return 1; - } - *ptr = val; - return 0; - } - return 1; -} - -static int get_config_string(cnode *node, char *ptr, int max_len, const char *name) -{ - size_t begin, end; - const char *value = config_str(node, name, NULL); - if (!value) - return -1; - - begin = strcspn(value, "\"") + 1; - end = strcspn(&value[begin], "\""); - - if ((int) end > max_len) { - D(WARN, "Identifier \"%s\" too long", value); - return -1; - } - - strncpy(ptr, &value[begin], end); - if((int) end < max_len) - ptr[end] = 0; - return 0; -} - -static void GPT_parse_header(cnode *node, struct GPT_content *content) -{ - get_config_uint64(node, &content->header.current_lba, "header_lba"); - get_config_uint64(node, &content->header.backup_lba, "backup_lba"); - get_config_uint64(node, &content->header.first_usable_lba, "first_lba"); - get_config_uint64(node, &content->header.last_usable_lba, "last_lba"); - get_config_uint64(node, &content->header.entries_lba, "entries_lba"); - get_config_string(node, (char *) content->header.disk_guid, 16, "guid"); -} - -static int GPT_parse_partitions(cnode *node, struct GPT_content *content) -{ - cnode *current; - int i; - uint64_t partition_size; - struct GPT_entry_raw *entry; - for (i = 0, current = node->first_child; current; current = current->next, ++i) { - entry = &content->entries[i]; - entry_set_guid(i, content->entries[i].partition_guid); - memcpy(&content->entries[i].type_guid, partition_type_uuid, 16); - if (get_config_uint64(current, &entry->first_lba, "first_lba")) { - D(ERR, "first_lba not specified"); - return 1; - } - if (get_config_uint64(current, &partition_size, "partition_size")) { - D(ERR, "partition_size not specified"); - return 1; - } - if (config_str(current, "system", NULL)) { - entry->flags |= GPT_FLAG_SYSTEM; - } - if (config_str(current, "bootable", NULL)) { - entry->flags |= GPT_FLAG_BOOTABLE; - } - if (config_str(current, "readonly", NULL)) { - entry->flags |= GPT_FLAG_READONLY; - } - if (config_str(current, "automount", NULL)) { - entry->flags |= GPT_FLAG_DOAUTOMOUNT; - } - - get_config_uint64(current, &content->entries[i].flags, "flags"); - content->entries[i].last_lba = content->entries[i].first_lba + partition_size - 1; - GPT_to_UTF16(content->entries[i].name, current->name, 16); - } - return 0; -} - -static inline int cnode_count(cnode *node) -{ - int i; - cnode *current; - for (i = 0, current = node->first_child; current; current = current->next, ++i) - ; - return i; -} - - -static int GPT_parse_cnode(cnode *root, struct GPT_content *content) -{ - cnode *partnode; - - if (!(partnode = config_find(root, "partitions"))) { - D(ERR, "Could not find partition table"); - return 0; - } - - GPT_parse_header(root, content); - - content->header.entries_count = cnode_count(partnode); - content->entries = malloc(content->header.entries_count * sizeof(struct GPT_entry_raw)); - - if (GPT_parse_partitions(partnode, content)) { - D(ERR, "Could not parse partitions"); - return 0; - } - - return 1; -} - -int GPT_parse_file(int fd, struct GPT_content *content) -{ - char *data; - int size; - int ret; - cnode *root = config_node("", ""); - - size = get_file_size(fd); - data = (char *) mmap(NULL, size + 1, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); - - if (data == NULL) { - if (size == 0) - D(ERR, "config file empty"); - else - D(ERR, "Out of memory"); - return 0; - } - - data[size - 1] = 0; - config_load(root, data); - - if (root->first_child == NULL) { - D(ERR, "Could not read config file"); - return 0; - } - - ret = GPT_parse_cnode(root, content); - munmap(data, size); - return ret; -} - -void GPT_release_content(struct GPT_content *content) -{ - free(content->entries); -} - -int GPT_write_content(const char *device, struct GPT_content *content) -{ - struct GPT_entry_table *maptable; - - maptable = GPT_get_from_content(device, content); - if (maptable == NULL) { - D(ERR, "could not map device"); - return 0; - } - - memcpy(maptable->header, &content->header, sizeof(*maptable->header)); - memcpy(maptable->entries, content->entries, - content->header.entries_count * sizeof(*maptable->entries)); - - GPT_sync(maptable); - GPT_release_device(maptable); - - return 1; -} - |