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Merge "Fix multiple calls to set_[source/type]" into main am: ad51f09b05

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Original change: https://android-review.googlesource.com/c/platform/system/core/+/2860565

Change-Id: Ic7f011fd8bb33a4b87616e48fa2c3622415ad239
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Kelvin Zhang 2023-12-05 21:20:44 +00:00 • committed by Automerger Merge Worker
commit 0c6bfd49c9
2 changed files with 43 additions and 0 deletions
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6
fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
View file

@ -226,6 +226,9 @@ struct CowOperationV3 {
uint64_t source_info_;
constexpr uint64_t source() const { return source_info_ & kCowOpSourceInfoDataMask; }
constexpr void set_source(uint64_t source) {
// Clear the first 48 bit first
source_info_ &= ~kCowOpSourceInfoDataMask;
// Set the actual source field
source_info_ |= source & kCowOpSourceInfoDataMask;
}
constexpr CowOperationType type() const {
@ -234,6 +237,9 @@ struct CowOperationV3 {
return static_cast<CowOperationType>(type);
}
constexpr void set_type(CowOperationType type) {
// Clear the top 4 bits first
source_info_ &= ((1ULL << kCowOpSourceInfoTypeBit) - 1);
// set the actual type bits
source_info_ |= (static_cast<uint64_t>(type) & kCowOpSourceInfoTypeMask)
<< kCowOpSourceInfoTypeBit;
}

37
fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
View file

@ -621,5 +621,42 @@ TEST_F(CowTestV3, ResumeSeqOp) {
ASSERT_EQ(expected_block, 0);
ASSERT_TRUE(iter->AtEnd());
}
TEST_F(CowTestV3, SetSourceManyTimes) {
CowOperationV3 op{};
op.set_source(1);
ASSERT_EQ(op.source(), 1);
op.set_source(2);
ASSERT_EQ(op.source(), 2);
op.set_source(4);
ASSERT_EQ(op.source(), 4);
op.set_source(8);
ASSERT_EQ(op.source(), 8);
}
TEST_F(CowTestV3, SetTypeManyTimes) {
CowOperationV3 op{};
op.set_type(kCowCopyOp);
ASSERT_EQ(op.type(), kCowCopyOp);
op.set_type(kCowReplaceOp);
ASSERT_EQ(op.type(), kCowReplaceOp);
op.set_type(kCowZeroOp);
ASSERT_EQ(op.type(), kCowZeroOp);
op.set_type(kCowXorOp);
ASSERT_EQ(op.type(), kCowXorOp);
}
TEST_F(CowTestV3, SetTypeSourceInverleave) {
CowOperationV3 op{};
op.set_type(kCowCopyOp);
ASSERT_EQ(op.type(), kCowCopyOp);
op.set_source(0x010203040506);
ASSERT_EQ(op.source(), 0x010203040506);
ASSERT_EQ(op.type(), kCowCopyOp);
op.set_type(kCowReplaceOp);
ASSERT_EQ(op.source(), 0x010203040506);
ASSERT_EQ(op.type(), kCowReplaceOp);
}
} // namespace snapshot
} // namespace android