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a987057c67
Sponsored-by: https://despairlabs.com/sponsor/ Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de> Signed-off-by: Rob Norris <robn@despairlabs.com> Closes #16479
58 lines
1.4 KiB
Plaintext
58 lines
1.4 KiB
Plaintext
dnl #
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dnl # Check for Direct I/O interfaces.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_DIRECT_IO], [
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ZFS_LINUX_TEST_SRC([direct_io_iter], [
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#include <linux/fs.h>
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static ssize_t test_direct_IO(struct kiocb *kiocb,
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struct iov_iter *iter) { return 0; }
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static const struct address_space_operations
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aops __attribute__ ((unused)) = {
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.direct_IO = test_direct_IO,
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};
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],[])
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ZFS_LINUX_TEST_SRC([direct_io_iter_offset], [
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#include <linux/fs.h>
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static ssize_t test_direct_IO(struct kiocb *kiocb,
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struct iov_iter *iter, loff_t offset) { return 0; }
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static const struct address_space_operations
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aops __attribute__ ((unused)) = {
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.direct_IO = test_direct_IO,
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};
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_VFS_DIRECT_IO], [
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dnl #
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dnl # Linux 4.6.x API change
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dnl #
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AC_MSG_CHECKING([whether aops->direct_IO() uses iov_iter])
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ZFS_LINUX_TEST_RESULT([direct_io_iter], [
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_VFS_DIRECT_IO_ITER, 1,
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[aops->direct_IO() uses iov_iter without rw])
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],[
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AC_MSG_RESULT([no])
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dnl #
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dnl # Linux 4.1.x API change
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dnl #
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AC_MSG_CHECKING(
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[whether aops->direct_IO() uses offset])
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ZFS_LINUX_TEST_RESULT([direct_io_iter_offset], [
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_VFS_DIRECT_IO_ITER_OFFSET, 1,
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[aops->direct_IO() uses iov_iter with offset])
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],[
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AC_MSG_RESULT([no])
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ZFS_LINUX_TEST_ERROR([Direct I/O])
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])
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])
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])
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