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-rw-r--r--updater/blockimg.cpp203
1 files changed, 101 insertions, 102 deletions
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index bdb64636b..f2811bccf 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -197,8 +197,8 @@ static int read_all(int fd, uint8_t* data, size_t size) {
return 0;
}
-static int read_all(int fd, std::vector<uint8_t>& buffer, size_t size) {
- return read_all(fd, buffer.data(), size);
+static int read_all(int fd, std::vector<uint8_t>* buffer, size_t size) {
+ return read_all(fd, buffer->data(), size);
}
static int write_all(int fd, const uint8_t* data, size_t size) {
@@ -244,11 +244,10 @@ static bool check_lseek(int fd, off64_t offset, int whence) {
return true;
}
-static void allocate(size_t size, std::vector<uint8_t>& buffer) {
- // if the buffer's big enough, reuse it.
- if (size <= buffer.size()) return;
-
- buffer.resize(size);
+static void allocate(size_t size, std::vector<uint8_t>* buffer) {
+ // If the buffer's big enough, reuse it.
+ if (size <= buffer->size()) return;
+ buffer->resize(size);
}
/**
@@ -502,7 +501,7 @@ static void* unzip_new_data(void* cookie) {
return nullptr;
}
-static int ReadBlocks(const RangeSet& src, std::vector<uint8_t>& buffer, int fd) {
+static int ReadBlocks(const RangeSet& src, std::vector<uint8_t>* buffer, int fd) {
size_t p = 0;
for (const auto& range : src) {
if (!check_lseek(fd, static_cast<off64_t>(range.first) * BLOCKSIZE, SEEK_SET)) {
@@ -510,7 +509,7 @@ static int ReadBlocks(const RangeSet& src, std::vector<uint8_t>& buffer, int fd)
}
size_t size = (range.second - range.first) * BLOCKSIZE;
- if (read_all(fd, buffer.data() + p, size) == -1) {
+ if (read_all(fd, buffer->data() + p, size) == -1) {
return -1;
}
@@ -662,31 +661,31 @@ static void PrintHashForMissingStashedBlocks(const std::string& id, int fd) {
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.blocks() * BLOCKSIZE);
- if (ReadBlocks(src, buffer, fd) == -1) {
- LOG(ERROR) << "failed to read source blocks for stash: " << id;
- return;
+ 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];
- const uint8_t* data = buffer.data();
+ const size_t blocks, bool printerror) {
+ uint8_t digest[SHA_DIGEST_LENGTH];
+ const uint8_t* data = buffer.data();
- SHA1(data, blocks * BLOCKSIZE, digest);
+ SHA1(data, blocks * BLOCKSIZE, digest);
- std::string hexdigest = print_sha1(digest);
+ std::string hexdigest = print_sha1(digest);
- if (hexdigest != expected) {
- if (printerror) {
- LOG(ERROR) << "failed to verify blocks (expected " << expected << ", read "
- << hexdigest << ")";
- }
- return -1;
+ if (hexdigest != expected) {
+ if (printerror) {
+ LOG(ERROR) << "failed to verify blocks (expected " << expected << ", read " << hexdigest
+ << ")";
}
+ return -1;
+ }
- return 0;
+ return 0;
}
static std::string GetStashFileName(const std::string& base, const std::string& id,
@@ -751,8 +750,8 @@ static void DeleteStash(const std::string& base) {
}
}
-static int LoadStash(CommandParameters& params, const std::string& id, bool verify,
- std::vector<uint8_t>& buffer, bool printnoent) {
+static int LoadStash(const CommandParameters& params, const std::string& id, bool verify,
+ 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) {
@@ -764,9 +763,9 @@ static int LoadStash(CommandParameters& params, const std::string& id, bool veri
LOG(ERROR) << "failed to read source blocks in stash map.";
return -1;
}
- if (VerifyBlocks(id, buffer, src.blocks(), true) != 0) {
+ if (VerifyBlocks(id, *buffer, src.blocks(), true) != 0) {
LOG(ERROR) << "failed to verify loaded source blocks in stash map.";
- PrintHashForCorruptedStashedBlocks(id, buffer, src);
+ PrintHashForCorruptedStashedBlocks(id, *buffer, src);
return -1;
}
return 0;
@@ -804,14 +803,14 @@ static int LoadStash(CommandParameters& params, const std::string& id, bool veri
}
size_t blocks = sb.st_size / BLOCKSIZE;
- if (verify && VerifyBlocks(id, buffer, blocks, true) != 0) {
+ 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);
+ PrintHashForCorruptedStashedBlocks(id, *buffer, src);
}
DeleteFile(fn);
return -1;
@@ -821,71 +820,71 @@ static int LoadStash(CommandParameters& params, const std::string& id, bool veri
}
static int WriteStash(const std::string& base, const std::string& id, int blocks,
- std::vector<uint8_t>& buffer, bool checkspace, bool* exists) {
- if (base.empty()) {
- return -1;
- }
-
- if (checkspace && CacheSizeCheck(blocks * BLOCKSIZE) != 0) {
- LOG(ERROR) << "not enough space to write stash";
- return -1;
- }
+ const std::vector<uint8_t>& buffer, bool checkspace, bool* exists) {
+ if (base.empty()) {
+ return -1;
+ }
- std::string fn = GetStashFileName(base, id, ".partial");
- std::string cn = GetStashFileName(base, id, "");
+ if (checkspace && CacheSizeCheck(blocks * BLOCKSIZE) != 0) {
+ LOG(ERROR) << "not enough space to write stash";
+ return -1;
+ }
- if (exists) {
- struct stat sb;
- int res = stat(cn.c_str(), &sb);
+ std::string fn = GetStashFileName(base, id, ".partial");
+ std::string cn = GetStashFileName(base, id, "");
- if (res == 0) {
- // The file already exists and since the name is the hash of the contents,
- // it's safe to assume the contents are identical (accidental hash collisions
- // are unlikely)
- LOG(INFO) << " skipping " << blocks << " existing blocks in " << cn;
- *exists = true;
- return 0;
- }
-
- *exists = false;
+ if (exists) {
+ struct stat sb;
+ int res = stat(cn.c_str(), &sb);
+
+ if (res == 0) {
+ // The file already exists and since the name is the hash of the contents,
+ // it's safe to assume the contents are identical (accidental hash collisions
+ // are unlikely)
+ LOG(INFO) << " skipping " << blocks << " existing blocks in " << cn;
+ *exists = true;
+ return 0;
}
- LOG(INFO) << " writing " << blocks << " blocks to " << cn;
+ *exists = false;
+ }
- android::base::unique_fd fd(
- TEMP_FAILURE_RETRY(ota_open(fn.c_str(), O_WRONLY | O_CREAT | O_TRUNC, STASH_FILE_MODE)));
- if (fd == -1) {
- PLOG(ERROR) << "failed to create \"" << fn << "\"";
- return -1;
- }
+ LOG(INFO) << " writing " << blocks << " blocks to " << cn;
- if (fchown(fd, AID_SYSTEM, AID_SYSTEM) != 0) { // system user
- PLOG(ERROR) << "failed to chown \"" << fn << "\"";
- return -1;
- }
+ android::base::unique_fd fd(
+ TEMP_FAILURE_RETRY(ota_open(fn.c_str(), O_WRONLY | O_CREAT | O_TRUNC, STASH_FILE_MODE)));
+ if (fd == -1) {
+ PLOG(ERROR) << "failed to create \"" << fn << "\"";
+ return -1;
+ }
- if (write_all(fd, buffer, blocks * BLOCKSIZE) == -1) {
- return -1;
- }
+ if (fchown(fd, AID_SYSTEM, AID_SYSTEM) != 0) { // system user
+ PLOG(ERROR) << "failed to chown \"" << fn << "\"";
+ return -1;
+ }
- if (ota_fsync(fd) == -1) {
- failure_type = kFsyncFailure;
- PLOG(ERROR) << "fsync \"" << fn << "\" failed";
- return -1;
- }
+ if (write_all(fd, buffer, blocks * BLOCKSIZE) == -1) {
+ return -1;
+ }
- if (rename(fn.c_str(), cn.c_str()) == -1) {
- PLOG(ERROR) << "rename(\"" << fn << "\", \"" << cn << "\") failed";
- return -1;
- }
+ if (ota_fsync(fd) == -1) {
+ failure_type = kFsyncFailure;
+ PLOG(ERROR) << "fsync \"" << fn << "\" failed";
+ return -1;
+ }
- std::string dname = GetStashFileName(base, "", "");
- if (!FsyncDir(dname)) {
- failure_type = kFsyncFailure;
- return -1;
- }
+ if (rename(fn.c_str(), cn.c_str()) == -1) {
+ PLOG(ERROR) << "rename(\"" << fn << "\", \"" << cn << "\") failed";
+ return -1;
+ }
- return 0;
+ std::string dname = GetStashFileName(base, "", "");
+ if (!FsyncDir(dname)) {
+ failure_type = kFsyncFailure;
+ return -1;
+ }
+
+ return 0;
}
// Creates a directory for storing stash files and checks if the /cache partition
@@ -1014,7 +1013,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
return -1;
}
- allocate(*src_blocks * BLOCKSIZE, params.buffer);
+ allocate(*src_blocks * BLOCKSIZE, &params.buffer);
// "-" or <src_range> [<src_loc>]
if (params.tokens[params.cpos] == "-") {
@@ -1025,7 +1024,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
CHECK(static_cast<bool>(src));
*overlap = src.Overlaps(tgt);
- if (ReadBlocks(src, params.buffer, params.fd) == -1) {
+ if (ReadBlocks(src, &params.buffer, params.fd) == -1) {
return -1;
}
@@ -1050,7 +1049,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
}
std::vector<uint8_t> stash;
- if (LoadStash(params, tokens[0], false, stash, true) == -1) {
+ if (LoadStash(params, tokens[0], false, &stash, true) == -1) {
// These source blocks will fail verification if used later, but we
// will let the caller decide if this is a fatal failure
LOG(ERROR) << "failed to load stash " << tokens[0];
@@ -1091,7 +1090,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
*
* If the return value is 0, source blocks have expected content and the command can be performed.
*/
-static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t* src_blocks,
+static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet* tgt, size_t* src_blocks,
bool onehash, bool* overlap) {
CHECK(src_blocks != nullptr);
CHECK(overlap != nullptr);
@@ -1122,21 +1121,21 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t*
}
// <tgt_range>
- tgt = RangeSet::Parse(params.tokens[params.cpos++]);
- CHECK(static_cast<bool>(tgt));
+ *tgt = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(*tgt));
- std::vector<uint8_t> tgtbuffer(tgt.blocks() * BLOCKSIZE);
- if (ReadBlocks(tgt, tgtbuffer, params.fd) == -1) {
+ std::vector<uint8_t> tgtbuffer(tgt->blocks() * BLOCKSIZE);
+ if (ReadBlocks(*tgt, &tgtbuffer, params.fd) == -1) {
return -1;
}
// Return now if target blocks already have expected content.
- if (VerifyBlocks(tgthash, tgtbuffer, tgt.blocks(), false) == 0) {
+ if (VerifyBlocks(tgthash, tgtbuffer, tgt->blocks(), false) == 0) {
return 1;
}
// Load source blocks.
- if (LoadSourceBlocks(params, tgt, src_blocks, overlap) == -1) {
+ if (LoadSourceBlocks(params, *tgt, src_blocks, overlap) == -1) {
return -1;
}
@@ -1165,7 +1164,7 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t*
return 0;
}
- if (*overlap && LoadStash(params, srchash, true, params.buffer, true) == 0) {
+ if (*overlap && LoadStash(params, srchash, true, &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.
@@ -1185,7 +1184,7 @@ static int PerformCommandMove(CommandParameters& params) {
size_t blocks = 0;
bool overlap = false;
RangeSet tgt;
- int status = LoadSrcTgtVersion3(params, tgt, &blocks, true, &overlap);
+ int status = LoadSrcTgtVersion3(params, &tgt, &blocks, true, &overlap);
if (status == -1) {
LOG(ERROR) << "failed to read blocks for move";
@@ -1231,7 +1230,7 @@ static int PerformCommandStash(CommandParameters& params) {
}
const std::string& id = params.tokens[params.cpos++];
- if (LoadStash(params, id, true, params.buffer, false) == 0) {
+ if (LoadStash(params, id, true, &params.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.
return 0;
@@ -1241,8 +1240,8 @@ static int PerformCommandStash(CommandParameters& params) {
CHECK(static_cast<bool>(src));
size_t blocks = src.blocks();
- allocate(blocks * BLOCKSIZE, params.buffer);
- if (ReadBlocks(src, params.buffer, params.fd) == -1) {
+ allocate(blocks * BLOCKSIZE, &params.buffer);
+ if (ReadBlocks(src, &params.buffer, params.fd) == -1) {
return -1;
}
stash_map[id] = src;
@@ -1296,7 +1295,7 @@ static int PerformCommandZero(CommandParameters& params) {
LOG(INFO) << " zeroing " << tgt.blocks() << " blocks";
- allocate(BLOCKSIZE, params.buffer);
+ allocate(BLOCKSIZE, &params.buffer);
memset(params.buffer.data(), 0, BLOCKSIZE);
if (params.canwrite) {
@@ -1384,7 +1383,7 @@ static int PerformCommandDiff(CommandParameters& params) {
RangeSet tgt;
size_t blocks = 0;
bool overlap = false;
- int status = LoadSrcTgtVersion3(params, tgt, &blocks, false, &overlap);
+ int status = LoadSrcTgtVersion3(params, &tgt, &blocks, false, &overlap);
if (status == -1) {
LOG(ERROR) << "failed to read blocks for diff";
@@ -1975,7 +1974,7 @@ Value* RangeSha1Fn(const char* name, State* state, const std::vector<std::unique
}
for (size_t j = range.first; j < range.second; ++j) {
- if (read_all(fd, buffer, BLOCKSIZE) == -1) {
+ if (read_all(fd, &buffer, BLOCKSIZE) == -1) {
ErrorAbort(state, kFreadFailure, "failed to read %s: %s", blockdev_filename->data.c_str(),
strerror(errno));
return StringValue("");
@@ -2025,7 +2024,7 @@ Value* CheckFirstBlockFn(const char* name, State* state,
RangeSet blk0(std::vector<Range>{ Range{ 0, 1 } });
std::vector<uint8_t> block0_buffer(BLOCKSIZE);
- if (ReadBlocks(blk0, block0_buffer, fd) == -1) {
+ if (ReadBlocks(blk0, &block0_buffer, fd) == -1) {
ErrorAbort(state, kFreadFailure, "failed to read %s: %s", arg_filename->data.c_str(),
strerror(errno));
return StringValue("");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 20:53:03 +0100