Disable xattr tests.

These can remain disabled until we actually support extended attributes.

The following modifications were also made:
1. Disable save/restore on tests that change file permissions. Restore will not
work properly for these tests, since it will try to open the file with
read-write after it has been read- or write-only.
2. Change user.abc to user.test.

PiperOrigin-RevId: 290123941

test/syscalls/BUILD

@@ -717,11 +717,6 @@ syscall_test(test = "//test/syscalls/linux:proc_net_tcp_test")
 
 syscall_test(test = "//test/syscalls/linux:proc_net_udp_test")
 
-syscall_test(
-    add_overlay = True,
-    test = "//test/syscalls/linux:xattr_test",
-)
-
 go_binary(
     name = "syscall_test_runner",
     testonly = 1,

test/syscalls/linux/xattr.cc

@@ -59,7 +59,8 @@ TEST_F(XattrTest, XattrLargeName) {
   std::string name = "user.";
   name += std::string(XATTR_NAME_MAX - name.length(), 'a');
 
-  // TODO(b/127675828): Support setxattr and getxattr.
+  // An xattr should be whitelisted before it can be accessed--do not allow
+  // arbitrary xattrs to be read/written in gVisor.
   if (!IsRunningOnGvisor()) {
     EXPECT_THAT(setxattr(path, name.c_str(), nullptr, 0, /*flags=*/0),
                 SyscallSucceeds());
@@ -83,59 +84,53 @@ TEST_F(XattrTest, XattrInvalidPrefix) {
               SyscallFailsWithErrno(EOPNOTSUPP));
 }
 
-TEST_F(XattrTest, XattrReadOnly) {
+// Do not allow save/restore cycles after making the test file read-only, as
+// the restore will fail to open it with r/w permissions.
+TEST_F(XattrTest, XattrReadOnly_NoRandomSave) {
   // Drop capabilities that allow us to override file and directory permissions.
   ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
   ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
 
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   size_t size = sizeof(val);
 
-  // TODO(b/127675828): Support setxattr and getxattr.
-  if (!IsRunningOnGvisor()) {
-    EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0),
-                SyscallSucceeds());
-  }
+  EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds());
 
+  DisableSave ds;
   ASSERT_NO_ERRNO(testing::Chmod(test_file_name_, S_IRUSR));
 
   EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0),
               SyscallFailsWithErrno(EACCES));
 
-  // TODO(b/127675828): Support setxattr and getxattr.
-  if (!IsRunningOnGvisor()) {
-    char buf = '-';
-    EXPECT_THAT(getxattr(path, name, &buf, size),
-                SyscallSucceedsWithValue(size));
-    EXPECT_EQ(buf, val);
-  }
+  char buf = '-';
+  EXPECT_THAT(getxattr(path, name, &buf, size), SyscallSucceedsWithValue(size));
+  EXPECT_EQ(buf, val);
 }
 
-TEST_F(XattrTest, XattrWriteOnly) {
+// Do not allow save/restore cycles after making the test file write-only, as
+// the restore will fail to open it with r/w permissions.
+TEST_F(XattrTest, XattrWriteOnly_NoRandomSave) {
   // Drop capabilities that allow us to override file and directory permissions.
   ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
   ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
 
+  DisableSave ds;
   ASSERT_NO_ERRNO(testing::Chmod(test_file_name_, S_IWUSR));
 
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   size_t size = sizeof(val);
 
-  // TODO(b/127675828): Support setxattr and getxattr.
-  if (!IsRunningOnGvisor()) {
-    EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0),
-                SyscallSucceeds());
-  }
+  EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds());
 
   EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(EACCES));
 }
 
 TEST_F(XattrTest, XattrTrustedWithNonadmin) {
-  // TODO(b/127675828): Support setxattr and getxattr.
+  // TODO(b/127675828): Support setxattr and getxattr with "trusted" prefix.
   SKIP_IF(IsRunningOnGvisor());
   SKIP_IF(ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN)));
 
@@ -147,11 +142,8 @@ TEST_F(XattrTest, XattrTrustedWithNonadmin) {
 }
 
 TEST_F(XattrTest, XattrOnDirectory) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   EXPECT_THAT(setxattr(dir.path().c_str(), name, NULL, 0, /*flags=*/0),
               SyscallSucceeds());
   EXPECT_THAT(getxattr(dir.path().c_str(), name, NULL, 0),
@@ -159,13 +151,10 @@ TEST_F(XattrTest, XattrOnDirectory) {
 }
 
 TEST_F(XattrTest, XattrOnSymlink) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
   TempPath link = ASSERT_NO_ERRNO_AND_VALUE(
       TempPath::CreateSymlinkTo(dir.path(), test_file_name_));
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   EXPECT_THAT(setxattr(link.path().c_str(), name, NULL, 0, /*flags=*/0),
               SyscallSucceeds());
   EXPECT_THAT(getxattr(link.path().c_str(), name, NULL, 0),
@@ -173,7 +162,7 @@ TEST_F(XattrTest, XattrOnSymlink) {
 }
 
 TEST_F(XattrTest, XattrOnInvalidFileTypes) {
-  char name[] = "user.abc";
+  const char name[] = "user.test";
 
   char char_device[] = "/dev/zero";
   EXPECT_THAT(setxattr(char_device, name, NULL, 0, /*flags=*/0),
@@ -191,11 +180,8 @@ TEST_F(XattrTest, XattrOnInvalidFileTypes) {
 }
 
 TEST_F(XattrTest, SetxattrSizeSmallerThanValue) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   std::vector<char> val = {'a', 'a'};
   size_t size = 1;
   EXPECT_THAT(setxattr(path, name, val.data(), size, /*flags=*/0),
@@ -209,11 +195,8 @@ TEST_F(XattrTest, SetxattrSizeSmallerThanValue) {
 }
 
 TEST_F(XattrTest, SetxattrZeroSize) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   EXPECT_THAT(setxattr(path, name, &val, 0, /*flags=*/0), SyscallSucceeds());
 
@@ -225,7 +208,7 @@ TEST_F(XattrTest, SetxattrZeroSize) {
 
 TEST_F(XattrTest, SetxattrSizeTooLarge) {
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
 
   // Note that each particular fs implementation may stipulate a lower size
   // limit, in which case we actually may fail (e.g. error with ENOSPC) for
@@ -235,43 +218,29 @@ TEST_F(XattrTest, SetxattrSizeTooLarge) {
   EXPECT_THAT(setxattr(path, name, val.data(), size, /*flags=*/0),
               SyscallFailsWithErrno(E2BIG));
 
-  // TODO(b/127675828): Support setxattr and getxattr.
-  if (!IsRunningOnGvisor()) {
-    EXPECT_THAT(getxattr(path, name, nullptr, 0),
-                SyscallFailsWithErrno(ENODATA));
-  }
+  EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA));
 }
 
 TEST_F(XattrTest, SetxattrNullValueAndNonzeroSize) {
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   EXPECT_THAT(setxattr(path, name, nullptr, 1, /*flags=*/0),
               SyscallFailsWithErrno(EFAULT));
 
-  // TODO(b/127675828): Support setxattr and getxattr.
-  if (!IsRunningOnGvisor()) {
-    EXPECT_THAT(getxattr(path, name, nullptr, 0),
-                SyscallFailsWithErrno(ENODATA));
-  }
+  EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA));
 }
 
 TEST_F(XattrTest, SetxattrNullValueAndZeroSize) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds());
 
   EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallSucceedsWithValue(0));
 }
 
 TEST_F(XattrTest, SetxattrValueTooLargeButOKSize) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   std::vector<char> val(XATTR_SIZE_MAX + 1);
   std::fill(val.begin(), val.end(), 'a');
   size_t size = 1;
@@ -286,11 +255,8 @@ TEST_F(XattrTest, SetxattrValueTooLargeButOKSize) {
 }
 
 TEST_F(XattrTest, SetxattrReplaceWithSmaller) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   std::vector<char> val = {'a', 'a'};
   EXPECT_THAT(setxattr(path, name, val.data(), 2, /*flags=*/0),
               SyscallSucceeds());
@@ -304,11 +270,8 @@ TEST_F(XattrTest, SetxattrReplaceWithSmaller) {
 }
 
 TEST_F(XattrTest, SetxattrReplaceWithLarger) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   std::vector<char> val = {'a', 'a'};
   EXPECT_THAT(setxattr(path, name, val.data(), 1, /*flags=*/0),
               SyscallSucceeds());
@@ -321,11 +284,8 @@ TEST_F(XattrTest, SetxattrReplaceWithLarger) {
 }
 
 TEST_F(XattrTest, SetxattrCreateFlag) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_CREATE),
               SyscallSucceeds());
   EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_CREATE),
@@ -335,11 +295,8 @@ TEST_F(XattrTest, SetxattrCreateFlag) {
 }
 
 TEST_F(XattrTest, SetxattrReplaceFlag) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_REPLACE),
               SyscallFailsWithErrno(ENODATA));
   EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds());
@@ -357,11 +314,8 @@ TEST_F(XattrTest, SetxattrInvalidFlags) {
 }
 
 TEST_F(XattrTest, Getxattr) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   int val = 1234;
   size_t size = sizeof(val);
   EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds());
@@ -372,11 +326,8 @@ TEST_F(XattrTest, Getxattr) {
 }
 
 TEST_F(XattrTest, GetxattrSizeSmallerThanValue) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   std::vector<char> val = {'a', 'a'};
   size_t size = val.size();
   EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds());
@@ -387,11 +338,8 @@ TEST_F(XattrTest, GetxattrSizeSmallerThanValue) {
 }
 
 TEST_F(XattrTest, GetxattrSizeLargerThanValue) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   EXPECT_THAT(setxattr(path, name, &val, 1, /*flags=*/0), SyscallSucceeds());
 
@@ -405,11 +353,8 @@ TEST_F(XattrTest, GetxattrSizeLargerThanValue) {
 }
 
 TEST_F(XattrTest, GetxattrZeroSize) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   EXPECT_THAT(setxattr(path, name, &val, sizeof(val), /*flags=*/0),
               SyscallSucceeds());
@@ -421,11 +366,8 @@ TEST_F(XattrTest, GetxattrZeroSize) {
 }
 
 TEST_F(XattrTest, GetxattrSizeTooLarge) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   EXPECT_THAT(setxattr(path, name, &val, sizeof(val), /*flags=*/0),
               SyscallSucceeds());
@@ -440,11 +382,8 @@ TEST_F(XattrTest, GetxattrSizeTooLarge) {
 }
 
 TEST_F(XattrTest, GetxattrNullValue) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   size_t size = sizeof(val);
   EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds());
@@ -454,11 +393,8 @@ TEST_F(XattrTest, GetxattrNullValue) {
 }
 
 TEST_F(XattrTest, GetxattrNullValueAndZeroSize) {
-  // TODO(b/127675828): Support setxattr and getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  char name[] = "user.abc";
+  const char name[] = "user.test";
   char val = 'a';
   size_t size = sizeof(val);
   // Set value with zero size.
@@ -473,13 +409,9 @@ TEST_F(XattrTest, GetxattrNullValueAndZeroSize) {
 }
 
 TEST_F(XattrTest, GetxattrNonexistentName) {
-  // TODO(b/127675828): Support getxattr.
-  SKIP_IF(IsRunningOnGvisor());
-
   const char* path = test_file_name_.c_str();
-  std::string name = "user.nonexistent";
-  EXPECT_THAT(getxattr(path, name.c_str(), nullptr, 0),
-              SyscallFailsWithErrno(ENODATA));
+  const char name[] = "user.test";
+  EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA));
 }
 
 }  // namespace