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update_verifier: Support verifying product partition.

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We have added the support for building /product partition in build
system (the CL in [1]), where /product is an optional partition that
contains system files. This CL adds the matching support if /product
needs to be verified during A/B OTA (i.e. listed in care_map file).

[1]: commit b7735d81054002961b681f4bdf296d4de2701135,
https://android-review.googlesource.com/c/platform/build/+/598454

Bug: 63974895
Test: Run update_verifier test on walleye.
Change-Id: Ia1c35e9583b8e66c98a4495b1f81a5ea7e65036f
This commit is contained in:
Tao Bao
2018-03-22 16:07:00 -07:00
parent 28dcad554c
commit ec2e8c6c1e
2 changed files with 11 additions and 14 deletions
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3
tests/component/update_verifier_test.cpp
View File

@@ -46,7 +46,6 @@ TEST_F(UpdateVerifierTest, verify_image_smoke) {
return;
}
// The care map file can have only two or four lines.
TemporaryFile temp_file;
std::string content = "system\n2,0,1";
ASSERT_TRUE(android::base::WriteStringToFile(content, temp_file.path));
@@ -58,7 +57,7 @@ TEST_F(UpdateVerifierTest, verify_image_smoke) {
}
TEST_F(UpdateVerifierTest, verify_image_wrong_lines) {
// The care map file can have only two or four lines.
// The care map file can have only 2 / 4 / 6 lines.
TemporaryFile temp_file;
ASSERT_FALSE(verify_image(temp_file.path));

22
update_verifier/update_verifier.cpp
View File

@@ -74,14 +74,13 @@ static int dm_name_filter(const dirent* de) {
}
static bool read_blocks(const std::string& partition, const std::string& range_str) {
if (partition != "system" && partition != "vendor") {
LOG(ERROR) << "partition name must be system or vendor: " << partition;
if (partition != "system" && partition != "vendor" && partition != "product") {
LOG(ERROR) << "Invalid partition name \"" << partition << "\"";
return false;
}
// Iterate the content of "/sys/block/dm-X/dm/name". If it matches "system"
// (or "vendor"), then dm-X is a dm-wrapped system/vendor partition.
// Afterwards, update_verifier will read every block on the care_map_file of
// "/dev/block/dm-X" to ensure the partition's integrity.
// Iterate the content of "/sys/block/dm-X/dm/name". If it matches one of "system", "vendor" or
// "product", then dm-X is a dm-wrapped device for that target. We will later read all the
// ("cared") blocks from "/dev/block/dm-X" to ensure the target partition's integrity.
static constexpr auto DM_PATH_PREFIX = "/sys/block/";
dirent** namelist;
int n = scandir(DM_PATH_PREFIX, &namelist, dm_name_filter, alphasort);
@@ -206,10 +205,9 @@ bool verify_image(const std::string& care_map_name) {
PLOG(WARNING) << "Failed to open " << care_map_name;
return true;
}
// Care map file has four lines (two lines if vendor partition is not present):
// First line has the block partition name (system/vendor).
// Second line holds all ranges of blocks to verify.
// The next two lines have the same format but for vendor partition.
// care_map file has up to six lines, where every two lines make a pair. Within each pair, the
// first line has the partition name (e.g. "system"), while the second line holds the ranges of
// all the blocks to verify.
std::string file_content;
if (!android::base::ReadFdToString(care_map_fd.get(), &file_content)) {
LOG(ERROR) << "Error reading care map contents to string.";
@@ -218,9 +216,9 @@ bool verify_image(const std::string& care_map_name) {
std::vector<std::string> lines;
lines = android::base::Split(android::base::Trim(file_content), "\n");
if (lines.size() != 2 && lines.size() != 4) {
if (lines.size() != 2 && lines.size() != 4 && lines.size() != 6) {
LOG(ERROR) << "Invalid lines in care_map: found " << lines.size()
<< " lines, expecting 2 or 4 lines.";
<< " lines, expecting 2 or 4 or 6 lines.";
return false;
}