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author | Elliott Hughes <enh@google.com> | 2016-06-16 00:28:05 +0200 |
---|---|---|
committer | android-build-merger <android-build-merger@google.com> | 2016-06-16 00:28:05 +0200 |
commit | eaddde6888b1f58d70b338ad7725214781014324 (patch) | |
tree | 95df40add23e127030abe0cb224c606659a33932 /applypatch/applypatch.cpp | |
parent | Merge \\"Add bootloader_message_ab struct.\\" am: 59f04b9982 (diff) | |
parent | resolve merge conflicts of 179c0d8 to stage-aosp-master (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | applypatch/applypatch.cpp | 308 |
1 files changed, 101 insertions, 207 deletions
diff --git a/applypatch/applypatch.cpp b/applypatch/applypatch.cpp index 270fde5c4..02a3c6e41 100644 --- a/applypatch/applypatch.cpp +++ b/applypatch/applypatch.cpp @@ -32,7 +32,6 @@ #include "openssl/sha.h" #include "applypatch/applypatch.h" -#include "mtdutils/mtdutils.h" #include "edify/expr.h" #include "ota_io.h" #include "print_sha1.h" @@ -49,17 +48,14 @@ static int GenerateTarget(FileContents* source_file, size_t target_size, const Value* bonus_data); -static bool mtd_partitions_scanned = false; - // Read a file into memory; store the file contents and associated // metadata in *file. // // Return 0 on success. int LoadFileContents(const char* filename, FileContents* file) { - // A special 'filename' beginning with "MTD:" or "EMMC:" means to + // A special 'filename' beginning with "EMMC:" means to // load the contents of a partition. - if (strncmp(filename, "MTD:", 4) == 0 || - strncmp(filename, "EMMC:", 5) == 0) { + if (strncmp(filename, "EMMC:", 5) == 0) { return LoadPartitionContents(filename, file); } @@ -87,10 +83,9 @@ int LoadFileContents(const char* filename, FileContents* file) { return 0; } -// Load the contents of an MTD or EMMC partition into the provided +// Load the contents of an EMMC partition into the provided // FileContents. filename should be a string of the form -// "MTD:<partition_name>:<size_1>:<sha1_1>:<size_2>:<sha1_2>:..." (or -// "EMMC:<partition_device>:..."). The smallest size_n bytes for +// "EMMC:<partition_device>:...". The smallest size_n bytes for // which that prefix of the partition contents has the corresponding // sha1 hash will be loaded. It is acceptable for a size value to be // repeated with different sha1s. Will return 0 on success. @@ -102,8 +97,6 @@ int LoadFileContents(const char* filename, FileContents* file) { // "end-of-file" marker), so the caller must specify the possible // lengths and the hash of the data, and we'll do the load expecting // to find one of those hashes. -enum PartitionType { MTD, EMMC }; - static int LoadPartitionContents(const char* filename, FileContents* file) { std::string copy(filename); std::vector<std::string> pieces = android::base::Split(copy, ":"); @@ -112,12 +105,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) { return -1; } - enum PartitionType type; - if (pieces[0] == "MTD") { - type = MTD; - } else if (pieces[0] == "EMMC") { - type = EMMC; - } else { + if (pieces[0] != "EMMC") { printf("LoadPartitionContents called with bad filename (%s)\n", filename); return -1; } @@ -145,36 +133,10 @@ static int LoadPartitionContents(const char* filename, FileContents* file) { } ); - MtdReadContext* ctx = NULL; - FILE* dev = NULL; - - switch (type) { - case MTD: { - if (!mtd_partitions_scanned) { - mtd_scan_partitions(); - mtd_partitions_scanned = true; - } - - const MtdPartition* mtd = mtd_find_partition_by_name(partition); - if (mtd == NULL) { - printf("mtd partition \"%s\" not found (loading %s)\n", partition, filename); - return -1; - } - - ctx = mtd_read_partition(mtd); - if (ctx == NULL) { - printf("failed to initialize read of mtd partition \"%s\"\n", partition); - return -1; - } - break; - } - - case EMMC: - dev = ota_fopen(partition, "rb"); - if (dev == NULL) { - printf("failed to open emmc partition \"%s\": %s\n", partition, strerror(errno)); - return -1; - } + FILE* dev = ota_fopen(partition, "rb"); + if (dev == NULL) { + printf("failed to open emmc partition \"%s\": %s\n", partition, strerror(errno)); + return -1; } SHA_CTX sha_ctx; @@ -192,16 +154,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) { // we're trying the possibilities in order of increasing size). size_t next = size[index[i]] - data_size; if (next > 0) { - size_t read = 0; - switch (type) { - case MTD: - read = mtd_read_data(ctx, p, next); - break; - - case EMMC: - read = ota_fread(p, 1, next, dev); - break; - } + size_t read = ota_fread(p, 1, next, dev); if (next != read) { printf("short read (%zu bytes of %zu) for partition \"%s\"\n", read, next, partition); @@ -234,16 +187,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) { } } - switch (type) { - case MTD: - mtd_read_close(ctx); - break; - - case EMMC: - ota_fclose(dev); - break; - } - + ota_fclose(dev); if (!found) { // Ran off the end of the list of (size,sha1) pairs without finding a match. @@ -302,7 +246,7 @@ int SaveFileContents(const char* filename, const FileContents* file) { } // Write a memory buffer to 'target' partition, a string of the form -// "MTD:<partition>[:...]" or "EMMC:<partition_device>[:...]". The target name +// "EMMC:<partition_device>[:...]". The target name // might contain multiple colons, but WriteToPartition() only uses the first // two and ignores the rest. Return 0 on success. int WriteToPartition(const unsigned char* data, size_t len, const char* target) { @@ -314,165 +258,117 @@ int WriteToPartition(const unsigned char* data, size_t len, const char* target) return -1; } - enum PartitionType type; - if (pieces[0] == "MTD") { - type = MTD; - } else if (pieces[0] == "EMMC") { - type = EMMC; - } else { + if (pieces[0] != "EMMC") { printf("WriteToPartition called with bad target (%s)\n", target); return -1; } const char* partition = pieces[1].c_str(); - switch (type) { - case MTD: { - if (!mtd_partitions_scanned) { - mtd_scan_partitions(); - mtd_partitions_scanned = true; - } - - const MtdPartition* mtd = mtd_find_partition_by_name(partition); - if (mtd == NULL) { - printf("mtd partition \"%s\" not found for writing\n", partition); - return -1; - } - - MtdWriteContext* ctx = mtd_write_partition(mtd); - if (ctx == NULL) { - printf("failed to init mtd partition \"%s\" for writing\n", partition); - return -1; - } + size_t start = 0; + bool success = false; + int fd = ota_open(partition, O_RDWR | O_SYNC); + if (fd < 0) { + printf("failed to open %s: %s\n", partition, strerror(errno)); + return -1; + } - size_t written = mtd_write_data(ctx, reinterpret_cast<const char*>(data), len); - if (written != len) { - printf("only wrote %zu of %zu bytes to MTD %s\n", written, len, partition); - mtd_write_close(ctx); - return -1; - } + for (size_t attempt = 0; attempt < 2; ++attempt) { + if (TEMP_FAILURE_RETRY(lseek(fd, start, SEEK_SET)) == -1) { + printf("failed seek on %s: %s\n", partition, strerror(errno)); + return -1; + } + while (start < len) { + size_t to_write = len - start; + if (to_write > 1<<20) to_write = 1<<20; - if (mtd_erase_blocks(ctx, -1) < 0) { - printf("error finishing mtd write of %s\n", partition); - mtd_write_close(ctx); + ssize_t written = TEMP_FAILURE_RETRY(ota_write(fd, data+start, to_write)); + if (written == -1) { + printf("failed write writing to %s: %s\n", partition, strerror(errno)); return -1; } + start += written; + } + if (ota_fsync(fd) != 0) { + printf("failed to sync to %s (%s)\n", partition, strerror(errno)); + return -1; + } + if (ota_close(fd) != 0) { + printf("failed to close %s (%s)\n", partition, strerror(errno)); + return -1; + } + fd = ota_open(partition, O_RDONLY); + if (fd < 0) { + printf("failed to reopen %s for verify (%s)\n", partition, strerror(errno)); + return -1; + } - if (mtd_write_close(ctx)) { - printf("error closing mtd write of %s\n", partition); - return -1; - } - break; + // Drop caches so our subsequent verification read + // won't just be reading the cache. + sync(); + int dc = ota_open("/proc/sys/vm/drop_caches", O_WRONLY); + if (TEMP_FAILURE_RETRY(ota_write(dc, "3\n", 2)) == -1) { + printf("write to /proc/sys/vm/drop_caches failed: %s\n", strerror(errno)); + } else { + printf(" caches dropped\n"); } + ota_close(dc); + sleep(1); - case EMMC: { - size_t start = 0; - bool success = false; - int fd = ota_open(partition, O_RDWR | O_SYNC); - if (fd < 0) { - printf("failed to open %s: %s\n", partition, strerror(errno)); - return -1; + // verify + if (TEMP_FAILURE_RETRY(lseek(fd, 0, SEEK_SET)) == -1) { + printf("failed to seek back to beginning of %s: %s\n", + partition, strerror(errno)); + return -1; + } + unsigned char buffer[4096]; + start = len; + for (size_t p = 0; p < len; p += sizeof(buffer)) { + size_t to_read = len - p; + if (to_read > sizeof(buffer)) { + to_read = sizeof(buffer); } - for (size_t attempt = 0; attempt < 2; ++attempt) { - if (TEMP_FAILURE_RETRY(lseek(fd, start, SEEK_SET)) == -1) { - printf("failed seek on %s: %s\n", partition, strerror(errno)); + size_t so_far = 0; + while (so_far < to_read) { + ssize_t read_count = + TEMP_FAILURE_RETRY(ota_read(fd, buffer+so_far, to_read-so_far)); + if (read_count == -1) { + printf("verify read error %s at %zu: %s\n", + partition, p, strerror(errno)); return -1; } - while (start < len) { - size_t to_write = len - start; - if (to_write > 1<<20) to_write = 1<<20; - - ssize_t written = TEMP_FAILURE_RETRY(ota_write(fd, data+start, to_write)); - if (written == -1) { - printf("failed write writing to %s: %s\n", partition, strerror(errno)); - return -1; - } - start += written; - } - if (ota_fsync(fd) != 0) { - printf("failed to sync to %s (%s)\n", partition, strerror(errno)); - return -1; - } - if (ota_close(fd) != 0) { - printf("failed to close %s (%s)\n", partition, strerror(errno)); - return -1; - } - fd = ota_open(partition, O_RDONLY); - if (fd < 0) { - printf("failed to reopen %s for verify (%s)\n", partition, strerror(errno)); - return -1; - } - - // Drop caches so our subsequent verification read - // won't just be reading the cache. - sync(); - int dc = ota_open("/proc/sys/vm/drop_caches", O_WRONLY); - if (TEMP_FAILURE_RETRY(ota_write(dc, "3\n", 2)) == -1) { - printf("write to /proc/sys/vm/drop_caches failed: %s\n", strerror(errno)); - } else { - printf(" caches dropped\n"); - } - ota_close(dc); - sleep(1); - - // verify - if (TEMP_FAILURE_RETRY(lseek(fd, 0, SEEK_SET)) == -1) { - printf("failed to seek back to beginning of %s: %s\n", - partition, strerror(errno)); - return -1; - } - unsigned char buffer[4096]; - start = len; - for (size_t p = 0; p < len; p += sizeof(buffer)) { - size_t to_read = len - p; - if (to_read > sizeof(buffer)) { - to_read = sizeof(buffer); - } - - size_t so_far = 0; - while (so_far < to_read) { - ssize_t read_count = - TEMP_FAILURE_RETRY(ota_read(fd, buffer+so_far, to_read-so_far)); - if (read_count == -1) { - printf("verify read error %s at %zu: %s\n", - partition, p, strerror(errno)); - return -1; - } - if (static_cast<size_t>(read_count) < to_read) { - printf("short verify read %s at %zu: %zd %zu %s\n", - partition, p, read_count, to_read, strerror(errno)); - } - so_far += read_count; - } - - if (memcmp(buffer, data+p, to_read) != 0) { - printf("verification failed starting at %zu\n", p); - start = p; - break; - } - } - - if (start == len) { - printf("verification read succeeded (attempt %zu)\n", attempt+1); - success = true; - break; + if (static_cast<size_t>(read_count) < to_read) { + printf("short verify read %s at %zu: %zd %zu %s\n", + partition, p, read_count, to_read, strerror(errno)); } + so_far += read_count; } - if (!success) { - printf("failed to verify after all attempts\n"); - return -1; + if (memcmp(buffer, data+p, to_read) != 0) { + printf("verification failed starting at %zu\n", p); + start = p; + break; } + } - if (ota_close(fd) != 0) { - printf("error closing %s (%s)\n", partition, strerror(errno)); - return -1; - } - sync(); + if (start == len) { + printf("verification read succeeded (attempt %zu)\n", attempt+1); + success = true; break; } } + if (!success) { + printf("failed to verify after all attempts\n"); + return -1; + } + + if (ota_close(fd) != 0) { + printf("error closing %s (%s)\n", partition, strerror(errno)); + return -1; + } + sync(); + return 0; } @@ -729,7 +625,7 @@ int applypatch_flash(const char* source_filename, const char* target_filename, std::string target_str(target_filename); std::vector<std::string> pieces = android::base::Split(target_str, ":"); - if (pieces.size() != 2 || (pieces[0] != "MTD" && pieces[0] != "EMMC")) { + if (pieces.size() != 2 || pieces[0] != "EMMC") { printf("invalid target name \"%s\"", target_filename); return 1; } @@ -778,8 +674,7 @@ static int GenerateTarget(FileContents* source_file, FileContents* source_to_use; int made_copy = 0; - bool target_is_partition = (strncmp(target_filename, "MTD:", 4) == 0 || - strncmp(target_filename, "EMMC:", 5) == 0); + bool target_is_partition = (strncmp(target_filename, "EMMC:", 5) == 0); const std::string tmp_target_filename = std::string(target_filename) + ".patch"; // assume that target_filename (eg "/system/app/Foo.apk") is located @@ -860,8 +755,7 @@ static int GenerateTarget(FileContents* source_file, // copy the source file to cache, then delete it from the original // location. - if (strncmp(source_filename, "MTD:", 4) == 0 || - strncmp(source_filename, "EMMC:", 5) == 0) { + if (strncmp(source_filename, "EMMC:", 5) == 0) { // It's impossible to free space on the target filesystem by // deleting the source if the source is a partition. If // we're ever in a state where we need to do this, fail. |