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authorTianjie Xu <xunchang@google.com>2018-05-11 19:41:44 +0200
committerTianjie Xu <xunchang@google.com>2018-07-25 23:15:22 +0200
commit4d9e62d8a07b233da4d82a42eb30de64cf2b45bd (patch)
tree85a75362ebbdcc93f88721bd411bdae873586068 /update_verifier/update_verifier.cpp
parentMerge "applypatch: Change applypatch command-line arguments." (diff)
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Diffstat (limited to 'update_verifier/update_verifier.cpp')
-rw-r--r--update_verifier/update_verifier.cpp72
1 files changed, 48 insertions, 24 deletions
diff --git a/update_verifier/update_verifier.cpp b/update_verifier/update_verifier.cpp
index dc7276326..5e5aa1819 100644
--- a/update_verifier/update_verifier.cpp
+++ b/update_verifier/update_verifier.cpp
@@ -60,6 +60,7 @@
#include <android/hardware/boot/1.0/IBootControl.h>
#include <cutils/android_reboot.h>
+#include "care_map.pb.h"
#include "otautil/rangeset.h"
using android::sp;
@@ -189,33 +190,12 @@ static bool read_blocks(const std::string& partition, const std::string& range_s
return ret;
}
-// Returns true to indicate a passing verification (or the error should be ignored); Otherwise
-// returns false on fatal errors, where we should reject the current boot and trigger a fallback.
-// Note that update_verifier should be backward compatible to not reject care_map.txt from old
-// releases, which could otherwise fail to boot into the new release. For example, we've changed
-// the care_map format between N and O. An O update_verifier would fail to work with N
-// care_map.txt. This could be a result of sideloading an O OTA while the device having a pending N
-// update.
-bool verify_image(const std::string& care_map_name) {
- android::base::unique_fd care_map_fd(TEMP_FAILURE_RETRY(open(care_map_name.c_str(), O_RDONLY)));
- // If the device is flashed before the current boot, it may not have care_map.txt
- // in /data/ota_package. To allow the device to continue booting in this situation,
- // we should print a warning and skip the block verification.
- if (care_map_fd.get() == -1) {
- PLOG(WARNING) << "Failed to open " << care_map_name;
- return true;
- }
+static bool process_care_map_plain_text(const std::string& care_map_contents) {
// 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.";
- return false;
- }
-
- std::vector<std::string> lines;
- lines = android::base::Split(android::base::Trim(file_content), "\n");
+ std::vector<std::string> lines =
+ android::base::Split(android::base::Trim(care_map_contents), "\n");
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 or 6 lines.";
@@ -237,6 +217,50 @@ bool verify_image(const std::string& care_map_name) {
return true;
}
+bool verify_image(const std::string& care_map_name) {
+ android::base::unique_fd care_map_fd(TEMP_FAILURE_RETRY(open(care_map_name.c_str(), O_RDONLY)));
+ // If the device is flashed before the current boot, it may not have care_map.txt in
+ // /data/ota_package. To allow the device to continue booting in this situation, we should
+ // print a warning and skip the block verification.
+ if (care_map_fd.get() == -1) {
+ PLOG(WARNING) << "Failed to open " << care_map_name;
+ return true;
+ }
+
+ std::string file_content;
+ if (!android::base::ReadFdToString(care_map_fd.get(), &file_content)) {
+ PLOG(ERROR) << "Failed to read " << care_map_name;
+ return false;
+ }
+
+ if (file_content.empty()) {
+ LOG(ERROR) << "Unexpected empty care map";
+ return false;
+ }
+
+ UpdateVerifier::CareMap care_map;
+ // Falls back to use the plain text version if we cannot parse the file as protobuf message.
+ if (!care_map.ParseFromString(file_content)) {
+ return process_care_map_plain_text(file_content);
+ }
+
+ for (const auto& partition : care_map.partitions()) {
+ if (partition.name().empty()) {
+ LOG(ERROR) << "Unexpected empty partition name.";
+ return false;
+ }
+ if (partition.ranges().empty()) {
+ LOG(ERROR) << "Unexpected block ranges for partition " << partition.name();
+ return false;
+ }
+ if (!read_blocks(partition.name(), partition.ranges())) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
static int reboot_device() {
if (android_reboot(ANDROID_RB_RESTART2, 0, nullptr) == -1) {
LOG(ERROR) << "Failed to reboot.";