updater: Add SourceInfo::{ReadAll,DumpBuffer,Overlaps}.
Bug: 112151972
Test: Run recovery_unit_test on marlin.
Change-Id: Ica2a7b3c768f5d8ca5d591a9560bca9f8ed847c5
diff --git a/updater/commands.cpp b/updater/commands.cpp
index 4a90ea8..0170863 100644
--- a/updater/commands.cpp
+++ b/updater/commands.cpp
@@ -16,6 +16,10 @@
#include "private/commands.h"
+#include <stdint.h>
+#include <string.h>
+
+#include <functional>
#include <ostream>
#include <string>
#include <vector>
@@ -24,7 +28,9 @@
#include <android-base/parseint.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
+#include <openssl/sha.h>
+#include "otautil/print_sha1.h"
#include "otautil/rangeset.h"
using namespace std::string_literals;
@@ -303,6 +309,70 @@
return Command(op, index, line, patch_info, target_info, source_info, stash_info);
}
+bool SourceInfo::Overlaps(const TargetInfo& target) const {
+ return ranges_.Overlaps(target.ranges());
+}
+
+// Moves blocks in the 'source' vector to the specified locations (as in 'locs') in the 'dest'
+// vector. Note that source and dest may be the same buffer.
+static void MoveRange(std::vector<uint8_t>* dest, const RangeSet& locs,
+ const std::vector<uint8_t>& source, size_t block_size) {
+ const uint8_t* from = source.data();
+ uint8_t* to = dest->data();
+ size_t start = locs.blocks();
+ // Must do the movement backward.
+ for (auto it = locs.crbegin(); it != locs.crend(); it++) {
+ size_t blocks = it->second - it->first;
+ start -= blocks;
+ memmove(to + (it->first * block_size), from + (start * block_size), blocks * block_size);
+ }
+}
+
+bool SourceInfo::ReadAll(
+ std::vector<uint8_t>* buffer, size_t block_size,
+ const std::function<int(const RangeSet&, std::vector<uint8_t>*)>& block_reader,
+ const std::function<int(const std::string&, std::vector<uint8_t>*)>& stash_reader) const {
+ if (buffer->size() < blocks() * block_size) {
+ return false;
+ }
+
+ // Read in the source ranges.
+ if (ranges_) {
+ if (block_reader(ranges_, buffer) != 0) {
+ return false;
+ }
+ if (location_) {
+ MoveRange(buffer, location_, *buffer, block_size);
+ }
+ }
+
+ // Read in the stashes.
+ for (const StashInfo& stash : stashes_) {
+ std::vector<uint8_t> stash_buffer(stash.blocks() * block_size);
+ if (stash_reader(stash.id(), &stash_buffer) != 0) {
+ return false;
+ }
+ MoveRange(buffer, stash.ranges(), stash_buffer, block_size);
+ }
+ return true;
+}
+
+void SourceInfo::DumpBuffer(const std::vector<uint8_t>& buffer, size_t block_size) const {
+ LOG(INFO) << "Dumping hashes in hex for " << ranges_.blocks() << " source blocks";
+
+ const RangeSet& location = location_ ? location_ : RangeSet({ Range{ 0, ranges_.blocks() } });
+ for (size_t i = 0; i < ranges_.blocks(); i++) {
+ size_t block_num = ranges_.GetBlockNumber(i);
+ size_t buffer_index = location.GetBlockNumber(i);
+ CHECK_LE((buffer_index + 1) * block_size, buffer.size());
+
+ uint8_t digest[SHA_DIGEST_LENGTH];
+ SHA1(buffer.data() + buffer_index * block_size, block_size, digest);
+ std::string hexdigest = print_sha1(digest);
+ LOG(INFO) << " block number: " << block_num << ", SHA-1: " << hexdigest;
+ }
+}
+
std::ostream& operator<<(std::ostream& os, const Command& command) {
os << command.index() << ": " << command.cmdline();
return os;
diff --git a/updater/include/private/commands.h b/updater/include/private/commands.h
index 85b5288..5212897 100644
--- a/updater/include/private/commands.h
+++ b/updater/include/private/commands.h
@@ -16,6 +16,9 @@
#pragma once
+#include <stdint.h>
+
+#include <functional>
#include <ostream>
#include <string>
#include <vector>
@@ -111,6 +114,23 @@
}
}
+ // Reads all the data specified by this SourceInfo object into the given 'buffer', by calling the
+ // given readers. Caller needs to specify the block size for the represented blocks. The given
+ // buffer needs to be sufficiently large. Otherwise it returns false. 'block_reader' and
+ // 'stash_reader' read the specified data into the given buffer (guaranteed to be large enough)
+ // respectively. The readers should return 0 on success, or -1 on error.
+ bool ReadAll(
+ std::vector<uint8_t>* buffer, size_t block_size,
+ const std::function<int(const RangeSet&, std::vector<uint8_t>*)>& block_reader,
+ const std::function<int(const std::string&, std::vector<uint8_t>*)>& stash_reader) const;
+
+ // Whether this SourceInfo overlaps with the given TargetInfo object.
+ bool Overlaps(const TargetInfo& target) const;
+
+ // Dumps the hashes in hex for the given buffer that's loaded from this SourceInfo object
+ // (excluding the stashed blocks which are handled separately).
+ void DumpBuffer(const std::vector<uint8_t>& buffer, size_t block_size) const;
+
const std::string& hash() const {
return hash_;
}
@@ -334,6 +354,10 @@
return hash_tree_info_;
}
+ size_t block_size() const {
+ return block_size_;
+ }
+
constexpr explicit operator bool() const {
return type_ != Type::LAST;
}
@@ -377,6 +401,8 @@
StashInfo stash_;
// The hash_tree info. Only meaningful for COMPUTE_HASH_TREE.
HashTreeInfo hash_tree_info_;
+ // The unit size of each block to be used in this command.
+ size_t block_size_{ 4096 };
};
std::ostream& operator<<(std::ostream& os, const Command& command);