| dnl # |
| dnl # Check for direct IO interfaces. |
| dnl # |
| AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_DIRECT_IO], [ |
| ZFS_LINUX_TEST_SRC([direct_io_iter], [ |
| #include <linux/fs.h> |
| |
| ssize_t test_direct_IO(struct kiocb *kiocb, |
| struct iov_iter *iter) { return 0; } |
| |
| static const struct address_space_operations |
| aops __attribute__ ((unused)) = { |
| .direct_IO = test_direct_IO, |
| }; |
| ],[]) |
| |
| ZFS_LINUX_TEST_SRC([direct_io_iter_offset], [ |
| #include <linux/fs.h> |
| |
| ssize_t test_direct_IO(struct kiocb *kiocb, |
| struct iov_iter *iter, loff_t offset) { return 0; } |
| |
| static const struct address_space_operations |
| aops __attribute__ ((unused)) = { |
| .direct_IO = test_direct_IO, |
| }; |
| ],[]) |
| |
| ZFS_LINUX_TEST_SRC([direct_io_iter_rw_offset], [ |
| #include <linux/fs.h> |
| |
| ssize_t test_direct_IO(int rw, struct kiocb *kiocb, |
| struct iov_iter *iter, loff_t offset) { return 0; } |
| |
| static const struct address_space_operations |
| aops __attribute__ ((unused)) = { |
| .direct_IO = test_direct_IO, |
| }; |
| ],[]) |
| |
| ZFS_LINUX_TEST_SRC([direct_io_iovec], [ |
| #include <linux/fs.h> |
| |
| ssize_t test_direct_IO(int rw, struct kiocb *kiocb, |
| const struct iovec *iov, loff_t offset, |
| unsigned long nr_segs) { return 0; } |
| |
| static const struct address_space_operations |
| aops __attribute__ ((unused)) = { |
| .direct_IO = test_direct_IO, |
| }; |
| ],[]) |
| ]) |
| |
| AC_DEFUN([ZFS_AC_KERNEL_VFS_DIRECT_IO], [ |
| dnl # |
| dnl # Linux 4.6.x API change |
| dnl # |
| AC_MSG_CHECKING([whether aops->direct_IO() uses iov_iter]) |
| ZFS_LINUX_TEST_RESULT([direct_io_iter], [ |
| AC_MSG_RESULT([yes]) |
| AC_DEFINE(HAVE_VFS_DIRECT_IO_ITER, 1, |
| [aops->direct_IO() uses iov_iter without rw]) |
| ],[ |
| AC_MSG_RESULT([no]) |
| |
| dnl # |
| dnl # Linux 4.1.x API change |
| dnl # |
| AC_MSG_CHECKING( |
| [whether aops->direct_IO() uses offset]) |
| ZFS_LINUX_TEST_RESULT([direct_io_iter_offset], [ |
| AC_MSG_RESULT([yes]) |
| AC_DEFINE(HAVE_VFS_DIRECT_IO_ITER_OFFSET, 1, |
| [aops->direct_IO() uses iov_iter with offset]) |
| |
| ],[ |
| AC_MSG_RESULT([no]) |
| |
| dnl # |
| dnl # Linux 3.16.x API change |
| dnl # |
| AC_MSG_CHECKING( |
| [whether aops->direct_IO() uses rw and offset]) |
| ZFS_LINUX_TEST_RESULT([direct_io_iter_rw_offset], [ |
| AC_MSG_RESULT([yes]) |
| AC_DEFINE(HAVE_VFS_DIRECT_IO_ITER_RW_OFFSET, 1, |
| [aops->direct_IO() uses iov_iter with ] |
| [rw and offset]) |
| ],[ |
| AC_MSG_RESULT([no]) |
| |
| dnl # |
| dnl # Ancient Linux API (predates git) |
| dnl # |
| AC_MSG_CHECKING( |
| [whether aops->direct_IO() uses iovec]) |
| ZFS_LINUX_TEST_RESULT([direct_io_iovec], [ |
| AC_MSG_RESULT([yes]) |
| AC_DEFINE(HAVE_VFS_DIRECT_IO_IOVEC, 1, |
| [aops->direct_IO() uses iovec]) |
| ],[ |
| ZFS_LINUX_TEST_ERROR([direct IO]) |
| AC_MSG_RESULT([no]) |
| ]) |
| ]) |
| ]) |
| ]) |
| ]) |