diff options
| -rw-r--r-- | updater/blockimg.cpp | 54 |
1 files changed, 46 insertions, 8 deletions
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp index 56378d4f5..9d329cd24 100644 --- a/updater/blockimg.cpp +++ b/updater/blockimg.cpp @@ -33,6 +33,7 @@ #include <unistd.h> #include <fec/io.h> +#include <map> #include <memory> #include <string> #include <vector> @@ -67,6 +68,8 @@ struct RangeSet { std::vector<size_t> pos; // Actual limit is INT_MAX. }; +static std::map<std::string, RangeSet> stash_map; + static void parse_range(const std::string& range_text, RangeSet& rs) { std::vector<std::string> pieces = android::base::Split(range_text, ","); @@ -522,8 +525,28 @@ static void DeleteStash(const std::string& base) { } } -static int LoadStash(const std::string& base, const std::string& id, bool verify, size_t* blocks, - std::vector<uint8_t>& buffer, bool printnoent) { +static int LoadStash(CommandParameters& params, const std::string& base, const std::string& id, + bool verify, size_t* blocks, std::vector<uint8_t>& buffer, bool printnoent) { + // In verify mode, if source range_set was saved for the given hash, + // check contents in the source blocks first. If the check fails, + // search for the stashed files on /cache as usual. + if (!params.canwrite) { + if (stash_map.find(id) != stash_map.end()) { + const RangeSet& src = stash_map[id]; + allocate(src.size * BLOCKSIZE, buffer); + + if (ReadBlocks(src, buffer, params.fd) == -1) { + fprintf(stderr, "failed to read source blocks in stash map.\n"); + return -1; + } + if (VerifyBlocks(id, buffer, src.size, true) != 0) { + fprintf(stderr, "failed to verify loaded source blocks in stash map.\n"); + return -1; + } + return 0; + } + } + if (base.empty()) { return -1; } @@ -722,7 +745,7 @@ static int SaveStash(CommandParameters& params, const std::string& base, const std::string& id = params.tokens[params.cpos++]; size_t blocks = 0; - if (usehash && LoadStash(base, id, true, &blocks, buffer, false) == 0) { + if (usehash && LoadStash(params, base, id, true, &blocks, buffer, false) == 0) { // Stash file already exists and has expected contents. Do not // read from source again, as the source may have been already // overwritten during a previous attempt. @@ -747,6 +770,12 @@ static int SaveStash(CommandParameters& params, const std::string& base, return 0; } + // In verify mode, save source range_set instead of stashing blocks. + if (!params.canwrite && usehash) { + stash_map[id] = src; + return 0; + } + fprintf(stderr, "stashing %zu blocks to %s\n", blocks, id.c_str()); return WriteStash(base, id, blocks, buffer, false, nullptr); } @@ -857,7 +886,7 @@ static int LoadSrcTgtVersion2(CommandParameters& params, RangeSet& tgt, size_t& } std::vector<uint8_t> stash; - int res = LoadStash(stashbase, tokens[0], false, nullptr, stash, true); + int res = LoadStash(params, stashbase, tokens[0], false, nullptr, stash, true); if (res == -1) { // These source blocks will fail verification if used later, but we @@ -931,8 +960,9 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t& if (VerifyBlocks(srchash, params.buffer, src_blocks, true) == 0) { // If source and target blocks overlap, stash the source blocks so we can - // resume from possible write errors - if (overlap) { + // resume from possible write errors. In verify mode, we can skip stashing + // because the source blocks won't be overwritten. + if (overlap && params.canwrite) { fprintf(stderr, "stashing %zu overlapping blocks to %s\n", src_blocks, srchash.c_str()); @@ -953,7 +983,8 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t& return 0; } - if (overlap && LoadStash(params.stashbase, srchash, true, nullptr, params.buffer, true) == 0) { + if (overlap && LoadStash(params, params.stashbase, srchash, true, nullptr, params.buffer, + true) == 0) { // Overlapping source blocks were previously stashed, command can proceed. // We are recovering from an interrupted command, so we don't know if the // stash can safely be deleted after this command. @@ -1028,8 +1059,15 @@ static int PerformCommandFree(CommandParameters& params) { return -1; } + const std::string& id = params.tokens[params.cpos++]; + + if (!params.canwrite && stash_map.find(id) != stash_map.end()) { + stash_map.erase(id); + return 0; + } + if (params.createdstash || params.canwrite) { - return FreeStash(params.stashbase, params.tokens[params.cpos++]); + return FreeStash(params.stashbase, id); } return 0; |