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Merge "Print SHA-1 in hex for corrupted blocks"

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am: 59383b383c

Change-Id: Ib1e6c3c853a52e619f053996c45913cfc9a70703
This commit is contained in:
Tianjie Xu 2017-03-13 20:25:18 +00:00 committed by android-build-merger
commit 821592aff4
1 changed files with 140 additions and 3 deletions
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143
updater/blockimg.cpp
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@ -66,6 +66,21 @@ struct RangeSet {
size_t count; // Limit is INT_MAX.
size_t size;
std::vector<size_t> pos; // Actual limit is INT_MAX.
// Get the block number for the ith(starting from 0) block in the range set.
int get_block(size_t idx) const {
if (idx >= size) {
LOG(ERROR) << "index: " << idx << " is greater than range set size: " << size;
return -1;
}
for (size_t i = 0; i < pos.size(); i += 2) {
if (idx < pos[i + 1] - pos[i]) {
return pos[i] + idx;
}
idx -= (pos[i + 1] - pos[i]);
}
return -1;
}
};
static CauseCode failure_type = kNoCause;
@ -441,6 +456,117 @@ static int LoadSrcTgtVersion1(CommandParameters& params, RangeSet& tgt, size_t&
return rc;
}
// Print the hash in hex for corrupted source blocks (excluding the stashed blocks which is
// handled separately).
static void PrintHashForCorruptedSourceBlocks(const CommandParameters& params,
const std::vector<uint8_t>& buffer) {
LOG(INFO) << "unexpected contents of source blocks in cmd:\n" << params.cmdline;
if (params.version < 3) {
// TODO handle version 1,2
LOG(WARNING) << "version number " << params.version << " is not supported to print hashes";
return;
}
CHECK(params.tokens[0] == "move" || params.tokens[0] == "bsdiff" ||
params.tokens[0] == "imgdiff");
size_t pos = 0;
// Command example:
// move <onehash> <tgt_range> <src_blk_count> <src_range> [<loc_range> <stashed_blocks>]
// bsdiff <offset> <len> <src_hash> <tgt_hash> <tgt_range> <src_blk_count> <src_range>
// [<loc_range> <stashed_blocks>]
if (params.tokens[0] == "move") {
// src_range for move starts at the 4th position.
if (params.tokens.size() < 5) {
LOG(ERROR) << "failed to parse source range in cmd:\n" << params.cmdline;
return;
}
pos = 4;
} else {
// src_range for diff starts at the 7th position.
if (params.tokens.size() < 8) {
LOG(ERROR) << "failed to parse source range in cmd:\n" << params.cmdline;
return;
}
pos = 7;
}
// Source blocks in stash only, no work to do.
if (params.tokens[pos] == "-") {
return;
}
RangeSet src = parse_range(params.tokens[pos++]);
RangeSet locs;
// If there's no stashed blocks, content in the buffer is consecutive and has the same
// order as the source blocks.
if (pos == params.tokens.size()) {
locs.count = 1;
locs.size = src.size;
locs.pos = { 0, src.size };
} else {
// Otherwise, the next token is the offset of the source blocks in the target range.
// Example: for the tokens <4,63946,63947,63948,63979> <4,6,7,8,39> <stashed_blocks>;
// We want to print SHA-1 for the data in buffer[6], buffer[8], buffer[9] ... buffer[38];
// this corresponds to the 32 src blocks #63946, #63948, #63949 ... #63978.
locs = parse_range(params.tokens[pos++]);
CHECK_EQ(src.size, locs.size);
CHECK_EQ(locs.pos.size() % 2, static_cast<size_t>(0));
}
LOG(INFO) << "printing hash in hex for " << src.size << " source blocks";
for (size_t i = 0; i < src.size; i++) {
int block_num = src.get_block(i);
CHECK_NE(block_num, -1);
int buffer_index = locs.get_block(i);
CHECK_NE(buffer_index, -1);
CHECK_LE((buffer_index + 1) * BLOCKSIZE, buffer.size());
uint8_t digest[SHA_DIGEST_LENGTH];
SHA1(buffer.data() + buffer_index * BLOCKSIZE, BLOCKSIZE, digest);
std::string hexdigest = print_sha1(digest);
LOG(INFO) << " block number: " << block_num << ", SHA-1: " << hexdigest;
}
}
// If the calculated hash for the whole stash doesn't match the stash id, print the SHA-1
// in hex for each block.
static void PrintHashForCorruptedStashedBlocks(const std::string& id,
const std::vector<uint8_t>& buffer,
const RangeSet& src) {
LOG(INFO) << "printing hash in hex for stash_id: " << id;
CHECK_EQ(src.size * BLOCKSIZE, buffer.size());
for (size_t i = 0; i < src.size; i++) {
int block_num = src.get_block(i);
CHECK_NE(block_num, -1);
uint8_t digest[SHA_DIGEST_LENGTH];
SHA1(buffer.data() + i * BLOCKSIZE, BLOCKSIZE, digest);
std::string hexdigest = print_sha1(digest);
LOG(INFO) << " block number: " << block_num << ", SHA-1: " << hexdigest;
}
}
// If the stash file doesn't exist, read the source blocks this stash contains and print the
// SHA-1 for these blocks.
static void PrintHashForMissingStashedBlocks(const std::string& id, int fd) {
if (stash_map.find(id) == stash_map.end()) {
LOG(ERROR) << "No stash saved for id: " << id;
return;
}
LOG(INFO) << "print hash in hex for source blocks in missing stash: " << id;
const RangeSet& src = stash_map[id];
std::vector<uint8_t> buffer(src.size * BLOCKSIZE);
if (ReadBlocks(src, buffer, fd) == -1) {
LOG(ERROR) << "failed to read source blocks for stash: " << id;
return;
}
PrintHashForCorruptedStashedBlocks(id, buffer, src);
}
static int VerifyBlocks(const std::string& expected, const std::vector<uint8_t>& buffer,
const size_t blocks, bool printerror) {
uint8_t digest[SHA_DIGEST_LENGTH];
@ -573,6 +699,7 @@ static int LoadStash(CommandParameters& params, const std::string& base, const s
}
if (VerifyBlocks(id, buffer, src.size, true) != 0) {
LOG(ERROR) << "failed to verify loaded source blocks in stash map.";
PrintHashForCorruptedStashedBlocks(id, buffer, src);
return -1;
}
return 0;
@ -597,6 +724,7 @@ static int LoadStash(CommandParameters& params, const std::string& base, const s
if (res == -1) {
if (errno != ENOENT || printnoent) {
PLOG(ERROR) << "stat \"" << fn << "\" failed";
PrintHashForMissingStashedBlocks(id, params.fd);
}
return -1;
}
@ -624,6 +752,13 @@ static int LoadStash(CommandParameters& params, const std::string& base, const s
if (verify && VerifyBlocks(id, buffer, *blocks, true) != 0) {
LOG(ERROR) << "unexpected contents in " << fn;
if (stash_map.find(id) == stash_map.end()) {
LOG(ERROR) << "failed to find source blocks number for stash " << id
<< " when executing command: " << params.cmdname;
} else {
const RangeSet& src = stash_map[id];
PrintHashForCorruptedStashedBlocks(id, buffer, src);
}
DeleteFile(fn, nullptr);
return -1;
}
@ -795,6 +930,7 @@ static int SaveStash(CommandParameters& params, const std::string& base,
return -1;
}
blocks = src.size;
stash_map[id] = src;
if (usehash && VerifyBlocks(id, buffer, blocks, true) != 0) {
// Source blocks have unexpected contents. If we actually need this
@ -805,9 +941,8 @@ static int SaveStash(CommandParameters& params, const std::string& base,
return 0;
}
// In verify mode, save source range_set instead of stashing blocks.
// In verify mode, we don't need to stash any blocks.
if (!params.canwrite && usehash) {
stash_map[id] = src;
return 0;
}
@ -1026,6 +1161,8 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t&
// Valid source data not available, update cannot be resumed
LOG(ERROR) << "partition has unexpected contents";
PrintHashForCorruptedSourceBlocks(params, params.buffer);
params.isunresumable = true;
return -1;
@ -1094,7 +1231,7 @@ static int PerformCommandFree(CommandParameters& params) {
const std::string& id = params.tokens[params.cpos++];
if (!params.canwrite && stash_map.find(id) != stash_map.end()) {
if (stash_map.find(id) != stash_map.end()) {
stash_map.erase(id);
return 0;
}