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Commit 593109f5 authored by David Anderson's avatar David Anderson Committed by android-build-merger
Browse files

Merge "Expose IsFilePinned through FiemapWriter." 

am: c98b1efd

Change-Id: Ib9c9b8cc0d91da4b9354776e7c27972ff6e222cf
parents 2ab4e5a3 c98b1efd

fs_mgr/libfiemap_writer/fiemap_writer.cpp

+15 −0
Original line number Diff line number Diff line
@@ -359,6 +359,21 @@ static bool IsFilePinned(int file_fd, const std::string& file_path, uint32_t fs_ 
    return moved_blocks_nr == 0;

}



bool FiemapWriter::HasPinnedExtents(const std::string& file_path) {

    android::base::unique_fd fd(open(file_path.c_str(), O_NOFOLLOW | O_CLOEXEC | O_RDONLY));

    if (fd < 0) {

        PLOG(ERROR) << "open: " << file_path;

        return false;

    }



    struct statfs64 sfs;

    if (fstatfs64(fd, &sfs)) {

        PLOG(ERROR) << "fstatfs64: " << file_path;

        return false;

    }

    return IsFilePinned(fd, file_path, sfs.f_type);

}



static void LogExtent(uint32_t num, const struct fiemap_extent& ext) {

    LOG(INFO) << "Extent #" << num;

    LOG(INFO) << "  fe_logical:  " << ext.fe_logical;

fs_mgr/libfiemap_writer/fiemap_writer_test.cpp

+8 −0
Original line number Diff line number Diff line
@@ -51,6 +51,8 @@ class FiemapWriterTest : public ::testing::Test { 
        testfile = ::android::base::StringPrintf("%s/testdata/%s", exec_dir.c_str(), tinfo->name());

    }



    void TearDown() override { unlink(testfile.c_str()); }



    // name of the file we use for testing

    std::string testfile;

};
@@ -102,6 +104,12 @@ TEST_F(FiemapWriterTest, CheckProgress) { 
    EXPECT_EQ(invocations, 2);

}



TEST_F(FiemapWriterTest, CheckPinning) {

    auto ptr = FiemapWriter::Open(testfile, 4096);

    ASSERT_NE(ptr, nullptr);

    EXPECT_TRUE(FiemapWriter::HasPinnedExtents(testfile));

}



TEST_F(FiemapWriterTest, CheckBlockDevicePath) {

    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, 4096);

    EXPECT_EQ(fptr->size(), 4096);

fs_mgr/libfiemap_writer/include/libfiemap_writer/fiemap_writer.h

+12 −0
Original line number Diff line number Diff line
@@ -45,6 +45,18 @@ class FiemapWriter final { 
                                bool create = true,

                                std::function<bool(uint64_t, uint64_t)> progress = {});



    // Check that a file still has the same extents since it was last opened with FiemapWriter,

    // assuming the file was not resized outside of FiemapWriter. Returns false either on error

    // or if the file was not pinned.

    //

    // This will always return true on Ext4. On F2FS, it will return true if either of the

    // following cases are true:

    //   - The file was never pinned.

    //   - The file is pinned and has not been moved by the GC.

    // Thus, this method should only be called for pinned files (such as those returned by

    // FiemapWriter::Open).

    static bool HasPinnedExtents(const std::string& file_path);



    // Syncs block device writes.

    bool Flush() const;