diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/matrix/matrix_test.go | 136 | ||||
| -rw-r--r-- | tests/test_helpers/helpers.go | 11 |
2 files changed, 133 insertions, 14 deletions
diff --git a/tests/matrix/matrix_test.go b/tests/matrix/matrix_test.go index d59a677..be5ff60 100644 --- a/tests/matrix/matrix_test.go +++ b/tests/matrix/matrix_test.go @@ -124,26 +124,26 @@ func TestTruncate(t *testing.T) { // Grow to two blocks file.Truncate(7000) test_helpers.VerifySize(t, fn, 7000) - if test_helpers.Md5fn(fn) != "95d4ec7038e3e4fdbd5f15c34c3f0b34" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "95d4ec7038e3e4fdbd5f15c34c3f0b34" { + t.Errorf("Wrong md5 %s", md5) } // Shrink - needs RMW file.Truncate(6999) test_helpers.VerifySize(t, fn, 6999) - if test_helpers.Md5fn(fn) != "35fd15873ec6c35380064a41b9b9683b" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "35fd15873ec6c35380064a41b9b9683b" { + t.Errorf("Wrong md5 %s", md5) } // Shrink to one partial block file.Truncate(465) test_helpers.VerifySize(t, fn, 465) - if test_helpers.Md5fn(fn) != "a1534d6e98a6b21386456a8f66c55260" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "a1534d6e98a6b21386456a8f66c55260" { + t.Errorf("Wrong md5 %s", md5) } // Grow to exactly one block file.Truncate(4096) test_helpers.VerifySize(t, fn, 4096) - if test_helpers.Md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "620f0b67a91f7f74151bc5be745b7110" { + t.Errorf("Wrong md5 %s", md5) } // Truncate to zero file.Truncate(0) @@ -153,25 +153,133 @@ func TestTruncate(t *testing.T) { sz = 10 * 1024 * 1024 file.Truncate(int64(sz)) test_helpers.VerifySize(t, fn, sz) - if test_helpers.Md5fn(fn) != "f1c9645dbc14efddc7d8a322685f26eb" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "f1c9645dbc14efddc7d8a322685f26eb" { + t.Errorf("Wrong md5 %s", md5) } // Grow to 10MB + 100B (partial block on the end) sz = 10*1024*1024 + 100 file.Truncate(int64(sz)) test_helpers.VerifySize(t, fn, sz) - if test_helpers.Md5fn(fn) != "c23ea79b857b91a7ff07c6ecf185f1ca" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "c23ea79b857b91a7ff07c6ecf185f1ca" { + t.Errorf("Wrong md5 %s", md5) } // Grow to 20MB (creates file holes, partial block on the front) sz = 20 * 1024 * 1024 file.Truncate(int64(sz)) test_helpers.VerifySize(t, fn, sz) - if test_helpers.Md5fn(fn) != "8f4e33f3dc3e414ff94e5fb6905cba8c" { - t.Errorf("wrong content") + if md5 := test_helpers.Md5fn(fn); md5 != "8f4e33f3dc3e414ff94e5fb6905cba8c" { + t.Errorf("Wrong md5 %s", md5) } } +const FALLOC_DEFAULT = 0x00 +const FALLOC_FL_KEEP_SIZE = 0x01 + +func TestFallocate(t *testing.T) { + fn := test_helpers.DefaultPlainDir + "/fallocate" + file, err := os.Create(fn) + if err != nil { + t.FailNow() + } + var nBlocks int64 + fd := int(file.Fd()) + _, nBlocks = test_helpers.Du(t, fd) + if nBlocks != 0 { + t.Fatalf("Empty file has %d blocks", nBlocks) + } + // Allocate 30 bytes, keep size + // gocryptfs || (0 blocks) + // ext4 | d | (1 block) + err = syscall.Fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, 30) + if err != nil { + t.Error(err) + } + _, nBlocks = test_helpers.Du(t, fd) + if want := 1; nBlocks/8 != int64(want) { + t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8) + } + test_helpers.VerifySize(t, fn, 0) + // Three ciphertext blocks. The middle one should be a file hole. + // gocryptfs | h | h | d| (1 block) + // ext4 | d | h | d | (2 blocks) + // (Note that gocryptfs blocks are slightly bigger than the ext4 blocks, + // but the last one is partial) + err = file.Truncate(9000) + if err != nil { + t.Fatal(err) + } + _, nBlocks = test_helpers.Du(t, fd) + if want := 2; nBlocks/8 != int64(want) { + t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8) + } + if md5 := test_helpers.Md5fn(fn); md5 != "5420afa22f6423a9f59e669540656bb4" { + t.Errorf("Wrong md5 %s", md5) + } + // Allocate the whole file space + // gocryptfs | h | h | d| (1 block) + // ext4 | d | d | d | (3 blocks + err = syscall.Fallocate(fd, FALLOC_DEFAULT, 0, 9000) + if err != nil { + t.Fatal(err) + } + _, nBlocks = test_helpers.Du(t, fd) + if want := 3; nBlocks/8 != int64(want) { + t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8) + } + // Neither apparent size nor content should have changed + test_helpers.VerifySize(t, fn, 9000) + if md5 := test_helpers.Md5fn(fn); md5 != "5420afa22f6423a9f59e669540656bb4" { + t.Errorf("Wrong md5 %s", md5) + } + + // Partial block on the end. The first ext4 block is dirtied by the header. + // gocryptfs | h | h | d| (1 block) + // ext4 | d | h | d | (2 blocks) + file.Truncate(0) + file.Truncate(9000) + _, nBlocks = test_helpers.Du(t, fd) + if want := 2; nBlocks/8 != int64(want) { + t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8) + } + // Allocate 10 bytes in the second block + // gocryptfs | h | h | d| (1 block) + // ext4 | d | d | d | (2 blocks) + syscall.Fallocate(fd, FALLOC_DEFAULT, 5000, 10) + _, nBlocks = test_helpers.Du(t, fd) + if want := 3; nBlocks/8 != int64(want) { + t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8) + } + // Neither apparent size nor content should have changed + test_helpers.VerifySize(t, fn, 9000) + if md5 := test_helpers.Md5fn(fn); md5 != "5420afa22f6423a9f59e669540656bb4" { + t.Errorf("Wrong md5 %s", md5) + } + // Grow the file to 4 blocks + // gocryptfs | h | h | d |d| (2 blocks) + // ext4 | d | d | d | d | (3 blocks) + syscall.Fallocate(fd, FALLOC_DEFAULT, 15000, 10) + _, nBlocks = test_helpers.Du(t, fd) + if want := 4; nBlocks/8 != int64(want) { + t.Errorf("Expected %d 4k block(s), got %d", want, nBlocks/8) + } + test_helpers.VerifySize(t, fn, 15010) + if md5 := test_helpers.Md5fn(fn); md5 != "c4c44c7a41ab7798a79d093eb44f99fc" { + t.Errorf("Wrong md5 %s", md5) + } + // Shrinking a file using fallocate should have no effect + for _, off := range []int64{0, 10, 2000, 5000} { + for _, sz := range []int64{0, 1, 42, 6000} { + syscall.Fallocate(fd, FALLOC_DEFAULT, off, sz) + test_helpers.VerifySize(t, fn, 15010) + if md5 := test_helpers.Md5fn(fn); md5 != "c4c44c7a41ab7798a79d093eb44f99fc" { + t.Errorf("Wrong md5 %s", md5) + } + } + } + // Cleanup + syscall.Unlink(fn) +} + func TestAppend(t *testing.T) { fn := test_helpers.DefaultPlainDir + "/append" file, err := os.Create(fn) diff --git a/tests/test_helpers/helpers.go b/tests/test_helpers/helpers.go index a6c2b7d..02b9fe0 100644 --- a/tests/test_helpers/helpers.go +++ b/tests/test_helpers/helpers.go @@ -283,3 +283,14 @@ func VerifyExistence(path string) bool { } return false } + +// Du returns the disk usage of the file "fd" points to, in bytes. +// Same as "du --block-size=1". +func Du(t *testing.T, fd int) (nBytes int64, nBlocks int64) { + var st syscall.Stat_t + err := syscall.Fstat(fd, &st) + if err != nil { + t.Fatal(err) + } + return st.Blocks * st.Blksize, st.Blocks +} |