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-rw-r--r--updater/commands.cpp247
1 files changed, 236 insertions, 11 deletions
diff --git a/updater/commands.cpp b/updater/commands.cpp
index f798c6a73..6d4b5310b 100644
--- a/updater/commands.cpp
+++ b/updater/commands.cpp
@@ -16,28 +16,253 @@
#include "private/commands.h"
+#include <ostream>
#include <string>
+#include <vector>
#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+
+#include "otautil/rangeset.h"
+
+using namespace std::string_literals;
Command::Type Command::ParseType(const std::string& type_str) {
- if (type_str == "zero") {
- return Type::ZERO;
- } else if (type_str == "new") {
- return Type::NEW;
+ if (type_str == "bsdiff") {
+ return Type::BSDIFF;
} else if (type_str == "erase") {
return Type::ERASE;
- } else if (type_str == "move") {
- return Type::MOVE;
- } else if (type_str == "bsdiff") {
- return Type::BSDIFF;
+ } else if (type_str == "free") {
+ return Type::FREE;
} else if (type_str == "imgdiff") {
return Type::IMGDIFF;
+ } else if (type_str == "move") {
+ return Type::MOVE;
+ } else if (type_str == "new") {
+ return Type::NEW;
} else if (type_str == "stash") {
return Type::STASH;
- } else if (type_str == "free") {
- return Type::FREE;
+ } else if (type_str == "zero") {
+ return Type::ZERO;
}
- LOG(ERROR) << "Invalid type: " << type_str;
return Type::LAST;
};
+
+bool Command::ParseTargetInfoAndSourceInfo(const std::vector<std::string>& tokens,
+ const std::string& tgt_hash, TargetInfo* target,
+ const std::string& src_hash, SourceInfo* source,
+ std::string* err) {
+ // We expect the given tokens parameter in one of the following formats.
+ //
+ // <tgt_ranges> <src_block_count> - <[stash_id:location] ...>
+ // (loads data from stashes only)
+ //
+ // <tgt_ranges> <src_block_count> <src_ranges>
+ // (loads data from source image only)
+ //
+ // <tgt_ranges> <src_block_count> <src_ranges> <src_ranges_location> <[stash_id:location] ...>
+ // (loads data from both of source image and stashes)
+
+ // At least it needs to provide three parameters: <tgt_ranges>, <src_block_count> and
+ // "-"/<src_ranges>.
+ if (tokens.size() < 3) {
+ *err = "invalid number of parameters";
+ return false;
+ }
+
+ size_t pos = 0;
+ RangeSet tgt_ranges = RangeSet::Parse(tokens[pos++]);
+ if (!tgt_ranges) {
+ *err = "invalid target ranges";
+ return false;
+ }
+ *target = TargetInfo(tgt_hash, tgt_ranges);
+
+ // <src_block_count>
+ const std::string& token = tokens[pos++];
+ size_t src_blocks;
+ if (!android::base::ParseUint(token, &src_blocks)) {
+ *err = "invalid src_block_count \""s + token + "\"";
+ return false;
+ }
+
+ RangeSet src_ranges;
+ RangeSet src_ranges_location;
+ // "-" or <src_ranges> [<src_ranges_location>]
+ if (tokens[pos] == "-") {
+ // no source ranges, only stashes
+ pos++;
+ } else {
+ src_ranges = RangeSet::Parse(tokens[pos++]);
+ if (!src_ranges) {
+ *err = "invalid source ranges";
+ return false;
+ }
+
+ if (pos >= tokens.size()) {
+ // No stashes, only source ranges.
+ SourceInfo result(src_hash, src_ranges, {}, {});
+
+ // Sanity check the block count.
+ if (result.blocks() != src_blocks) {
+ *err =
+ android::base::StringPrintf("mismatching block count: %zu (%s) vs %zu", result.blocks(),
+ src_ranges.ToString().c_str(), src_blocks);
+ return false;
+ }
+
+ *source = result;
+ return true;
+ }
+
+ src_ranges_location = RangeSet::Parse(tokens[pos++]);
+ if (!src_ranges_location) {
+ *err = "invalid source ranges location";
+ return false;
+ }
+ }
+
+ // <[stash_id:stash_location]>
+ std::vector<StashInfo> stashes;
+ while (pos < tokens.size()) {
+ // Each word is a an index into the stash table, a colon, and then a RangeSet describing where
+ // in the source block that stashed data should go.
+ std::vector<std::string> pairs = android::base::Split(tokens[pos++], ":");
+ if (pairs.size() != 2) {
+ *err = "invalid stash info";
+ return false;
+ }
+ RangeSet stash_location = RangeSet::Parse(pairs[1]);
+ if (!stash_location) {
+ *err = "invalid stash location";
+ return false;
+ }
+ stashes.emplace_back(pairs[0], stash_location);
+ }
+
+ SourceInfo result(src_hash, src_ranges, src_ranges_location, stashes);
+ if (src_blocks != result.blocks()) {
+ *err = android::base::StringPrintf("mismatching block count: %zu (%s) vs %zu", result.blocks(),
+ src_ranges.ToString().c_str(), src_blocks);
+ return false;
+ }
+
+ *source = result;
+ return true;
+}
+
+Command Command::Parse(const std::string& line, size_t index, std::string* err) {
+ std::vector<std::string> tokens = android::base::Split(line, " ");
+ size_t pos = 0;
+ // tokens.size() will be 1 at least.
+ Type op = ParseType(tokens[pos++]);
+ if (op == Type::LAST) {
+ *err = "invalid type";
+ return {};
+ }
+
+ PatchInfo patch_info;
+ TargetInfo target_info;
+ SourceInfo source_info;
+ StashInfo stash_info;
+
+ if (op == Type::ZERO || op == Type::NEW || op == Type::ERASE) {
+ // zero/new/erase <rangeset>
+ RangeSet tgt_ranges = RangeSet::Parse(tokens[pos++]);
+ if (!tgt_ranges) {
+ return {};
+ }
+ static const std::string kUnknownHash{ "unknown-hash" };
+ target_info = TargetInfo(kUnknownHash, tgt_ranges);
+ } else if (op == Type::STASH) {
+ // stash <stash_id> <src_ranges>
+ if (pos + 2 > tokens.size()) {
+ *err = "missing stash id and/or source ranges";
+ return {};
+ }
+ const std::string& id = tokens[pos++];
+ RangeSet src_ranges = RangeSet::Parse(tokens[pos++]);
+ if (!src_ranges) {
+ *err = "invalid token";
+ return {};
+ }
+ stash_info = StashInfo(id, src_ranges);
+ } else if (op == Type::FREE) {
+ // free <stash_id>
+ if (pos + 1 > tokens.size()) {
+ *err = "missing stash id in free command";
+ return {};
+ }
+ stash_info = StashInfo(tokens[pos++], {});
+ } else if (op == Type::MOVE) {
+ // <hash>
+ if (pos + 1 > tokens.size()) {
+ *err = "missing hash";
+ return {};
+ }
+ std::string hash = tokens[pos++];
+ if (!ParseTargetInfoAndSourceInfo(
+ std::vector<std::string>(tokens.cbegin() + pos, tokens.cend()), hash, &target_info,
+ hash, &source_info, err)) {
+ return {};
+ }
+ } else if (op == Type::BSDIFF || op == Type::IMGDIFF) {
+ // <offset> <length> <srchash> <dsthash>
+ if (pos + 4 > tokens.size()) {
+ *err = "invalid number of tokens";
+ return {};
+ }
+ size_t offset;
+ size_t length;
+ if (!android::base::ParseUint(tokens[pos++], &offset) ||
+ !android::base::ParseUint(tokens[pos++], &length)) {
+ *err = "invalid patch offset/length";
+ return {};
+ }
+ patch_info = PatchInfo(offset, length);
+
+ std::string src_hash = tokens[pos++];
+ std::string dst_hash = tokens[pos++];
+ if (!ParseTargetInfoAndSourceInfo(
+ std::vector<std::string>(tokens.cbegin() + pos, tokens.cend()), dst_hash, &target_info,
+ src_hash, &source_info, err)) {
+ return {};
+ }
+ } else {
+ *err = "invalid op";
+ return {};
+ }
+
+ return Command(op, index, line, patch_info, target_info, source_info, stash_info);
+}
+
+std::ostream& operator<<(std::ostream& os, const Command& command) {
+ os << command.index() << ": " << command.cmdline();
+ return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const TargetInfo& target) {
+ os << target.blocks() << " blocks (" << target.hash_ << "): " << target.ranges_.ToString();
+ return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const StashInfo& stash) {
+ os << stash.blocks() << " blocks (" << stash.id_ << "): " << stash.ranges_.ToString();
+ return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const SourceInfo& source) {
+ os << source.blocks_ << " blocks (" << source.hash_ << "): ";
+ if (source.ranges_) {
+ os << source.ranges_.ToString();
+ if (source.location_) {
+ os << " (location: " << source.location_.ToString() << ")";
+ }
+ }
+ if (!source.stashes_.empty()) {
+ os << " " << source.stashes_.size() << " stash(es)";
+ }
+ return os;
+}