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-rw-r--r--updater/blockimg.cpp308
1 files changed, 149 insertions, 159 deletions
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index 7257e2399..6755d78cb 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -41,106 +41,104 @@
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
+#include <applypatch/applypatch.h>
+#include <openssl/sha.h>
#include <ziparchive/zip_archive.h>
-#include "applypatch/applypatch.h"
#include "edify/expr.h"
#include "error_code.h"
#include "updater/install.h"
-#include "openssl/sha.h"
#include "ota_io.h"
#include "print_sha1.h"
#include "updater/updater.h"
-static constexpr size_t BLOCKSIZE = 4096;
-
// Set this to 0 to interpret 'erase' transfers to mean do a
// BLKDISCARD ioctl (the normal behavior). Set to 1 to interpret
// erase to mean fill the region with zeroes.
#define DEBUG_ERASE 0
-#define STASH_DIRECTORY_BASE "/cache/recovery"
-#define STASH_DIRECTORY_MODE 0700
-#define STASH_FILE_MODE 0600
+static constexpr size_t BLOCKSIZE = 4096;
+static constexpr const char* STASH_DIRECTORY_BASE = "/cache/recovery";
+static constexpr mode_t STASH_DIRECTORY_MODE = 0700;
+static constexpr mode_t STASH_FILE_MODE = 0600;
struct RangeSet {
- size_t count; // Limit is INT_MAX.
- size_t size;
- std::vector<size_t> pos; // Actual limit is INT_MAX.
+ size_t count; // Limit is INT_MAX.
+ size_t size;
+ std::vector<size_t> pos; // Actual limit is INT_MAX.
};
static CauseCode failure_type = kNoCause;
static bool is_retry = false;
static std::unordered_map<std::string, RangeSet> stash_map;
-static void parse_range(const std::string& range_text, RangeSet& rs) {
+static RangeSet parse_range(const std::string& range_text) {
+ RangeSet rs;
- std::vector<std::string> pieces = android::base::Split(range_text, ",");
- if (pieces.size() < 3) {
- goto err;
- }
+ std::vector<std::string> pieces = android::base::Split(range_text, ",");
+ if (pieces.size() < 3) {
+ goto err;
+ }
- size_t num;
- if (!android::base::ParseUint(pieces[0].c_str(), &num, static_cast<size_t>(INT_MAX))) {
- goto err;
- }
+ size_t num;
+ if (!android::base::ParseUint(pieces[0], &num, static_cast<size_t>(INT_MAX))) {
+ goto err;
+ }
- if (num == 0 || num % 2) {
- goto err; // must be even
- } else if (num != pieces.size() - 1) {
- goto err;
- }
+ if (num == 0 || num % 2) {
+ goto err; // must be even
+ } else if (num != pieces.size() - 1) {
+ goto err;
+ }
- rs.pos.resize(num);
- rs.count = num / 2;
- rs.size = 0;
+ rs.pos.resize(num);
+ rs.count = num / 2;
+ rs.size = 0;
- for (size_t i = 0; i < num; i += 2) {
- if (!android::base::ParseUint(pieces[i+1].c_str(), &rs.pos[i],
- static_cast<size_t>(INT_MAX))) {
- goto err;
- }
-
- if (!android::base::ParseUint(pieces[i+2].c_str(), &rs.pos[i+1],
- static_cast<size_t>(INT_MAX))) {
- goto err;
- }
+ for (size_t i = 0; i < num; i += 2) {
+ if (!android::base::ParseUint(pieces[i + 1], &rs.pos[i], static_cast<size_t>(INT_MAX))) {
+ goto err;
+ }
- if (rs.pos[i] >= rs.pos[i+1]) {
- goto err; // empty or negative range
- }
+ if (!android::base::ParseUint(pieces[i + 2], &rs.pos[i + 1], static_cast<size_t>(INT_MAX))) {
+ goto err;
+ }
- size_t sz = rs.pos[i+1] - rs.pos[i];
- if (rs.size > SIZE_MAX - sz) {
- goto err; // overflow
- }
+ if (rs.pos[i] >= rs.pos[i + 1]) {
+ goto err; // empty or negative range
+ }
- rs.size += sz;
+ size_t sz = rs.pos[i + 1] - rs.pos[i];
+ if (rs.size > SIZE_MAX - sz) {
+ goto err; // overflow
}
- return;
+ rs.size += sz;
+ }
+
+ return rs;
err:
- LOG(ERROR) << "failed to parse range '" << range_text << "'";
- exit(1);
+ LOG(ERROR) << "failed to parse range '" << range_text << "'";
+ exit(1);
}
static bool range_overlaps(const RangeSet& r1, const RangeSet& r2) {
- for (size_t i = 0; i < r1.count; ++i) {
- size_t r1_0 = r1.pos[i * 2];
- size_t r1_1 = r1.pos[i * 2 + 1];
+ for (size_t i = 0; i < r1.count; ++i) {
+ size_t r1_0 = r1.pos[i * 2];
+ size_t r1_1 = r1.pos[i * 2 + 1];
- for (size_t j = 0; j < r2.count; ++j) {
- size_t r2_0 = r2.pos[j * 2];
- size_t r2_1 = r2.pos[j * 2 + 1];
+ for (size_t j = 0; j < r2.count; ++j) {
+ size_t r2_0 = r2.pos[j * 2];
+ size_t r2_1 = r2.pos[j * 2 + 1];
- if (!(r2_0 >= r1_1 || r1_0 >= r2_1)) {
- return true;
- }
- }
+ if (!(r2_0 >= r1_1 || r1_0 >= r2_1)) {
+ return true;
+ }
}
+ }
- return false;
+ return false;
}
static int read_all(int fd, uint8_t* data, size_t size) {
@@ -431,11 +429,10 @@ static int LoadSrcTgtVersion1(CommandParameters& params, RangeSet& tgt, size_t&
}
// <src_range>
- RangeSet src;
- parse_range(params.tokens[params.cpos++], src);
+ RangeSet src = parse_range(params.tokens[params.cpos++]);
// <tgt_range>
- parse_range(params.tokens[params.cpos++], tgt);
+ tgt = parse_range(params.tokens[params.cpos++]);
allocate(src.size * BLOCKSIZE, buffer);
int rc = ReadBlocks(src, buffer, fd);
@@ -509,18 +506,18 @@ static void EnumerateStash(const std::string& dirname, StashCallback callback, v
}
static void UpdateFileSize(const std::string& fn, void* data) {
- if (fn.empty() || !data) {
- return;
- }
+ if (fn.empty() || !data) {
+ return;
+ }
- struct stat sb;
- if (stat(fn.c_str(), &sb) == -1) {
- PLOG(ERROR) << "stat \"" << fn << "\" failed";
- return;
- }
+ struct stat sb;
+ if (stat(fn.c_str(), &sb) == -1) {
+ PLOG(ERROR) << "stat \"" << fn << "\" failed";
+ return;
+ }
- int* size = reinterpret_cast<int*>(data);
- *size += sb.st_size;
+ size_t* size = static_cast<size_t*>(data);
+ *size += sb.st_size;
}
// Deletes the stash directory and all files in it. Assumes that it only
@@ -710,63 +707,67 @@ static int WriteStash(const std::string& base, const std::string& id, int blocks
// hash enough space for the expected amount of blocks we need to store. Returns
// >0 if we created the directory, zero if it existed already, and <0 of failure.
-static int CreateStash(State* state, int maxblocks, const char* blockdev, std::string& base) {
- if (blockdev == nullptr) {
- return -1;
- }
-
- // Stash directory should be different for each partition to avoid conflicts
- // when updating multiple partitions at the same time, so we use the hash of
- // the block device name as the base directory
- uint8_t digest[SHA_DIGEST_LENGTH];
- SHA1(reinterpret_cast<const uint8_t*>(blockdev), strlen(blockdev), digest);
- base = print_sha1(digest);
-
- std::string dirname = GetStashFileName(base, "", "");
- struct stat sb;
- int res = stat(dirname.c_str(), &sb);
-
- if (res == -1 && errno != ENOENT) {
- ErrorAbort(state, kStashCreationFailure, "stat \"%s\" failed: %s\n",
- dirname.c_str(), strerror(errno));
- return -1;
- } else if (res != 0) {
- LOG(INFO) << "creating stash " << dirname;
- res = mkdir(dirname.c_str(), STASH_DIRECTORY_MODE);
-
- if (res != 0) {
- ErrorAbort(state, kStashCreationFailure, "mkdir \"%s\" failed: %s\n",
- dirname.c_str(), strerror(errno));
- return -1;
- }
+static int CreateStash(State* state, size_t maxblocks, const std::string& blockdev,
+ std::string& base) {
+ if (blockdev.empty()) {
+ return -1;
+ }
+
+ // Stash directory should be different for each partition to avoid conflicts
+ // when updating multiple partitions at the same time, so we use the hash of
+ // the block device name as the base directory
+ uint8_t digest[SHA_DIGEST_LENGTH];
+ SHA1(reinterpret_cast<const uint8_t*>(blockdev.data()), blockdev.size(), digest);
+ base = print_sha1(digest);
+
+ std::string dirname = GetStashFileName(base, "", "");
+ struct stat sb;
+ int res = stat(dirname.c_str(), &sb);
+ size_t max_stash_size = maxblocks * BLOCKSIZE;
+
+ if (res == -1 && errno != ENOENT) {
+ ErrorAbort(state, kStashCreationFailure, "stat \"%s\" failed: %s\n", dirname.c_str(),
+ strerror(errno));
+ return -1;
+ } else if (res != 0) {
+ LOG(INFO) << "creating stash " << dirname;
+ res = mkdir(dirname.c_str(), STASH_DIRECTORY_MODE);
- if (CacheSizeCheck(maxblocks * BLOCKSIZE) != 0) {
- ErrorAbort(state, kStashCreationFailure, "not enough space for stash\n");
- return -1;
- }
+ if (res != 0) {
+ ErrorAbort(state, kStashCreationFailure, "mkdir \"%s\" failed: %s\n", dirname.c_str(),
+ strerror(errno));
+ return -1;
+ }
- return 1; // Created directory
+ if (CacheSizeCheck(max_stash_size) != 0) {
+ ErrorAbort(state, kStashCreationFailure, "not enough space for stash (%zu needed)\n",
+ max_stash_size);
+ return -1;
}
- LOG(INFO) << "using existing stash " << dirname;
+ return 1; // Created directory
+ }
- // If the directory already exists, calculate the space already allocated to
- // stash files and check if there's enough for all required blocks. Delete any
- // partially completed stash files first.
+ LOG(INFO) << "using existing stash " << dirname;
- EnumerateStash(dirname, DeletePartial, nullptr);
- int size = 0;
- EnumerateStash(dirname, UpdateFileSize, &size);
+ // If the directory already exists, calculate the space already allocated to
+ // stash files and check if there's enough for all required blocks. Delete any
+ // partially completed stash files first.
- size = maxblocks * BLOCKSIZE - size;
+ EnumerateStash(dirname, DeletePartial, nullptr);
+ size_t existing = 0;
+ EnumerateStash(dirname, UpdateFileSize, &existing);
- if (size > 0 && CacheSizeCheck(size) != 0) {
- ErrorAbort(state, kStashCreationFailure, "not enough space for stash (%d more needed)\n",
- size);
- return -1;
+ if (max_stash_size > existing) {
+ size_t needed = max_stash_size - existing;
+ if (CacheSizeCheck(needed) != 0) {
+ ErrorAbort(state, kStashCreationFailure, "not enough space for stash (%zu more needed)\n",
+ needed);
+ return -1;
}
+ }
- return 0; // Using existing directory
+ return 0; // Using existing directory
}
static int SaveStash(CommandParameters& params, const std::string& base,
@@ -787,8 +788,7 @@ static int SaveStash(CommandParameters& params, const std::string& base,
return 0;
}
- RangeSet src;
- parse_range(params.tokens[params.cpos++], src);
+ RangeSet src = parse_range(params.tokens[params.cpos++]);
allocate(src.size * BLOCKSIZE, buffer);
if (ReadBlocks(src, buffer, fd) == -1) {
@@ -872,7 +872,7 @@ static int LoadSrcTgtVersion2(CommandParameters& params, RangeSet& tgt, size_t&
}
// <tgt_range>
- parse_range(params.tokens[params.cpos++], tgt);
+ tgt = parse_range(params.tokens[params.cpos++]);
// <src_block_count>
const std::string& token = params.tokens[params.cpos++];
@@ -888,8 +888,7 @@ static int LoadSrcTgtVersion2(CommandParameters& params, RangeSet& tgt, size_t&
// no source ranges, only stashes
params.cpos++;
} else {
- RangeSet src;
- parse_range(params.tokens[params.cpos++], src);
+ RangeSet src = parse_range(params.tokens[params.cpos++]);
int res = ReadBlocks(src, buffer, fd);
if (overlap) {
@@ -905,8 +904,7 @@ static int LoadSrcTgtVersion2(CommandParameters& params, RangeSet& tgt, size_t&
return 0;
}
- RangeSet locs;
- parse_range(params.tokens[params.cpos++], locs);
+ RangeSet locs = parse_range(params.tokens[params.cpos++]);
MoveRange(buffer, locs, buffer);
}
@@ -931,8 +929,7 @@ static int LoadSrcTgtVersion2(CommandParameters& params, RangeSet& tgt, size_t&
continue;
}
- RangeSet locs;
- parse_range(tokens[1], locs);
+ RangeSet locs = parse_range(tokens[1]);
MoveRange(buffer, locs, stash);
}
@@ -1116,8 +1113,7 @@ static int PerformCommandZero(CommandParameters& params) {
return -1;
}
- RangeSet tgt;
- parse_range(params.tokens[params.cpos++], tgt);
+ RangeSet tgt = parse_range(params.tokens[params.cpos++]);
LOG(INFO) << " zeroing " << tgt.size << " blocks";
@@ -1160,8 +1156,7 @@ static int PerformCommandNew(CommandParameters& params) {
return -1;
}
- RangeSet tgt;
- parse_range(params.tokens[params.cpos++], tgt);
+ RangeSet tgt = parse_range(params.tokens[params.cpos++]);
if (params.canwrite) {
LOG(INFO) << " writing " << tgt.size << " blocks of new data";
@@ -1316,8 +1311,7 @@ static int PerformCommandErase(CommandParameters& params) {
return -1;
}
- RangeSet tgt;
- parse_range(params.tokens[params.cpos++], tgt);
+ RangeSet tgt = parse_range(params.tokens[params.cpos++]);
if (params.canwrite) {
LOG(INFO) << " erasing " << tgt.size << " blocks";
@@ -1358,7 +1352,7 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
CommandParameters params = {};
params.canwrite = !dryrun;
- LOG(INFO) << "performing " << dryrun ? "verification" : "update";
+ LOG(INFO) << "performing " << (dryrun ? "verification" : "update");
if (state->is_retry) {
is_retry = true;
LOG(INFO) << "This update is a retry.";
@@ -1393,8 +1387,7 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
return StringValue("");
}
- UpdaterInfo* ui = reinterpret_cast<UpdaterInfo*>(state->cookie);
-
+ UpdaterInfo* ui = static_cast<UpdaterInfo*>(state->cookie);
if (ui == nullptr) {
return StringValue("");
}
@@ -1452,7 +1445,7 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
}
// First line in transfer list is the version number
- if (!android::base::ParseInt(lines[0].c_str(), &params.version, 1, 4)) {
+ if (!android::base::ParseInt(lines[0], &params.version, 1, 4)) {
LOG(ERROR) << "unexpected transfer list version [" << lines[0] << "]";
return StringValue("");
}
@@ -1460,8 +1453,8 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
LOG(INFO) << "blockimg version is " << params.version;
// Second line in transfer list is the total number of blocks we expect to write
- int total_blocks;
- if (!android::base::ParseInt(lines[1].c_str(), &total_blocks, 0)) {
+ size_t total_blocks;
+ if (!android::base::ParseUint(lines[1], &total_blocks)) {
ErrorAbort(state, kArgsParsingFailure, "unexpected block count [%s]\n", lines[1].c_str());
return StringValue("");
}
@@ -1473,23 +1466,23 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
size_t start = 2;
if (params.version >= 2) {
if (lines.size() < 4) {
- ErrorAbort(state, kArgsParsingFailure, "too few lines in the transfer list [%zu]\n",
- lines.size());
- return StringValue("");
+ ErrorAbort(state, kArgsParsingFailure, "too few lines in the transfer list [%zu]\n",
+ lines.size());
+ return StringValue("");
}
// Third line is how many stash entries are needed simultaneously
LOG(INFO) << "maximum stash entries " << lines[2];
// Fourth line is the maximum number of blocks that will be stashed simultaneously
- int stash_max_blocks;
- if (!android::base::ParseInt(lines[3].c_str(), &stash_max_blocks, 0)) {
+ size_t stash_max_blocks;
+ if (!android::base::ParseUint(lines[3], &stash_max_blocks)) {
ErrorAbort(state, kArgsParsingFailure, "unexpected maximum stash blocks [%s]\n",
lines[3].c_str());
return StringValue("");
}
- int res = CreateStash(state, stash_max_blocks, blockdev_filename->data.c_str(), params.stashbase);
+ int res = CreateStash(state, stash_max_blocks, blockdev_filename->data, params.stashbase);
if (res == -1) {
return StringValue("");
}
@@ -1514,15 +1507,13 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
// Subsequent lines are all individual transfer commands
for (auto it = lines.cbegin() + start; it != lines.cend(); it++) {
- const std::string& line_str(*it);
- if (line_str.empty()) {
- continue;
- }
+ const std::string& line(*it);
+ if (line.empty()) continue;
- params.tokens = android::base::Split(line_str, " ");
+ params.tokens = android::base::Split(line, " ");
params.cpos = 0;
params.cmdname = params.tokens[params.cpos++].c_str();
- params.cmdline = line_str.c_str();
+ params.cmdline = line.c_str();
if (cmd_map.find(params.cmdname) == cmd_map.end()) {
LOG(ERROR) << "unexpected command [" << params.cmdname << "]";
@@ -1532,7 +1523,7 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
const Command* cmd = cmd_map[params.cmdname];
if (cmd->f != nullptr && cmd->f(params) == -1) {
- LOG(ERROR) << "failed to execute command [" << line_str << "]";
+ LOG(ERROR) << "failed to execute command [" << line << "]";
goto pbiudone;
}
@@ -1542,7 +1533,8 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
PLOG(ERROR) << "fsync failed";
goto pbiudone;
}
- fprintf(cmd_pipe, "set_progress %.4f\n", (double) params.written / total_blocks);
+ fprintf(cmd_pipe, "set_progress %.4f\n",
+ static_cast<double>(params.written) / total_blocks);
fflush(cmd_pipe);
}
}
@@ -1555,7 +1547,7 @@ static Value* PerformBlockImageUpdate(const char* name, State* state, int /* arg
LOG(INFO) << "max alloc needed was " << params.buffer.size();
const char* partition = strrchr(blockdev_filename->data.c_str(), '/');
- if (partition != nullptr && *(partition+1) != 0) {
+ if (partition != nullptr && *(partition + 1) != 0) {
fprintf(cmd_pipe, "log bytes_written_%s: %zu\n", partition + 1,
params.written * BLOCKSIZE);
fprintf(cmd_pipe, "log bytes_stashed_%s: %zu\n", partition + 1,
@@ -1707,8 +1699,7 @@ Value* RangeSha1Fn(const char* name, State* state, int /* argc */, Expr* argv[])
return StringValue("");
}
- RangeSet rs;
- parse_range(ranges->data, rs);
+ RangeSet rs = parse_range(ranges->data);
SHA_CTX ctx;
SHA1_Init(&ctx);
@@ -1832,8 +1823,7 @@ Value* BlockImageRecoverFn(const char* name, State* state, int argc, Expr* argv[
return StringValue("");
}
- RangeSet rs;
- parse_range(ranges->data, rs);
+ RangeSet rs = parse_range(ranges->data);
uint8_t buffer[BLOCKSIZE];
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 03:41:25 +0200