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-rw-r--r--applypatch/applypatch.cpp308
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.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 14:22:59 +0100