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-rw-r--r--io/tst-statx.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/io/tst-statx.c b/io/tst-statx.c
new file mode 100644
index 0000000000..61bf31d177
--- /dev/null
+++ b/io/tst-statx.c
@@ -0,0 +1,157 @@
+/* Basic test of statx system call.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/temp_file.h>
+#include <support/xunistd.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/sysmacros.h>
+#include <unistd.h>
+
+/* Ensure that the types have the kernel-expected layout. */
+_Static_assert (sizeof (struct statx_timestamp) == 16, "statx_timestamp size");
+_Static_assert (sizeof (struct statx) == 256, "statx size");
+_Static_assert (offsetof (struct statx, stx_nlink) == 16, "statx nlink");
+_Static_assert (offsetof (struct statx, stx_ino) == 32, "statx ino");
+_Static_assert (offsetof (struct statx, stx_atime) == 64, "statx atime");
+_Static_assert (offsetof (struct statx, stx_rdev_major) == 128, "statx rdev");
+_Static_assert (offsetof (struct statx, __statx_pad2) == 144, "statx pad2");
+
+#include "statx_generic.c"
+
+typedef int (*statx_function) (int, const char *, int, unsigned int,
+ struct statx *);
+
+/* Return true if we have a real implementation of statx. */
+static bool
+kernel_supports_statx (void)
+{
+#ifdef __NR_statx
+ struct statx buf;
+ return syscall (__NR_statx, 0, "", AT_EMPTY_PATH, 0, &buf) == 0
+ || errno != ENOSYS;
+#else
+ return false;
+#endif
+}
+
+/* Tests which apply to both implementations. */
+static void
+both_implementations_tests (statx_function impl, const char *path, int fd)
+{
+ uint64_t ino;
+ {
+ struct statx buf = { 0, };
+ TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &buf), 0);
+ TEST_COMPARE (buf.stx_size, 3);
+ ino = buf.stx_ino;
+ }
+ {
+ struct statx buf = { 0, };
+ TEST_COMPARE (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &buf), 0);
+ TEST_COMPARE (buf.stx_size, 3);
+ TEST_COMPARE (buf.stx_ino, ino);
+ }
+ {
+ struct statx stx = { 0, };
+ TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &stx), 0);
+ struct stat64 st;
+ xfstat (fd, &st);
+ TEST_COMPARE (stx.stx_mode, st.st_mode);
+ TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
+ TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
+ }
+ {
+ struct statx stx = { 0, };
+ TEST_COMPARE (statx (AT_FDCWD, "/dev/null", 0, STATX_BASIC_STATS, &stx),
+ 0);
+ struct stat64 st;
+ xstat ("/dev/null", &st);
+ TEST_COMPARE (stx.stx_mode, st.st_mode);
+ TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
+ TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
+ TEST_COMPARE (stx.stx_rdev_major, major (st.st_rdev));
+ TEST_COMPARE (stx.stx_rdev_minor, minor (st.st_rdev));
+ }
+}
+
+/* Tests which apply only to the non-kernel (generic)
+ implementation. */
+static void
+non_kernel_tests (statx_function impl, int fd)
+{
+ /* The non-kernel implementation must always fail for explicit sync
+ flags. */
+ struct statx buf;
+ errno = 0;
+ TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC,
+ STATX_BASIC_STATS, &buf), -1);
+ TEST_COMPARE (errno, EINVAL);
+ errno = 0;
+ TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC,
+ STATX_BASIC_STATS, &buf), -1);
+ TEST_COMPARE (errno, EINVAL);
+}
+
+static int
+do_test (void)
+{
+ char *path;
+ int fd = create_temp_file ("tst-statx-", &path);
+ TEST_VERIFY_EXIT (fd >= 0);
+ support_write_file_string (path, "abc");
+
+ both_implementations_tests (&statx, path, fd);
+ both_implementations_tests (&statx_generic, path, fd);
+
+ if (kernel_supports_statx ())
+ {
+ puts ("info: kernel supports statx");
+ struct statx buf;
+ buf.stx_size = 0;
+ TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC,
+ STATX_BASIC_STATS, &buf),
+ 0);
+ TEST_COMPARE (buf.stx_size, 3);
+ buf.stx_size = 0;
+ TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC,
+ STATX_BASIC_STATS, &buf),
+ 0);
+ TEST_COMPARE (buf.stx_size, 3);
+ }
+ else
+ {
+ puts ("info: kernel does not support statx");
+ non_kernel_tests (&statx, fd);
+ }
+ non_kernel_tests (&statx_generic, fd);
+
+ xclose (fd);
+ free (path);
+
+ return 0;
+}
+
+#include <support/test-driver.c>