mirror_zfs/config/kernel-vfs-iterate.m4
Rob Norris 64afc4e66e Linux 6.8 compat: make test functions static
The kernel is now being compiled with -Wmissing-prototypes. Most of our
test stub functions had no prototype, and failed to compile. Since they
don't need to be visible anywhere else, just make them all static.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #15805
2024-01-29 14:53:29 -08:00

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AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_ITERATE], [
ZFS_LINUX_TEST_SRC([file_operations_iterate_shared], [
#include <linux/fs.h>
static int iterate(struct file *filp, struct dir_context * context)
{ return 0; }
static const struct file_operations fops
__attribute__ ((unused)) = {
.iterate_shared = iterate,
};
],[])
ZFS_LINUX_TEST_SRC([file_operations_iterate], [
#include <linux/fs.h>
static int iterate(struct file *filp,
struct dir_context *context) { return 0; }
static const struct file_operations fops
__attribute__ ((unused)) = {
.iterate = iterate,
};
#if defined(FMODE_KABI_ITERATE)
#error "RHEL 7.5, FMODE_KABI_ITERATE interface"
#endif
],[])
ZFS_LINUX_TEST_SRC([file_operations_readdir], [
#include <linux/fs.h>
static int readdir(struct file *filp, void *entry,
filldir_t func) { return 0; }
static const struct file_operations fops
__attribute__ ((unused)) = {
.readdir = readdir,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_VFS_ITERATE], [
dnl #
dnl # 4.7 API change
dnl #
AC_MSG_CHECKING([whether fops->iterate_shared() is available])
ZFS_LINUX_TEST_RESULT([file_operations_iterate_shared], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VFS_ITERATE_SHARED, 1,
[fops->iterate_shared() is available])
],[
AC_MSG_RESULT(no)
dnl #
dnl # 3.11 API change
dnl #
dnl # RHEL 7.5 compatibility; the fops.iterate() method was
dnl # added to the file_operations structure but in order to
dnl # maintain KABI compatibility all callers must set
dnl # FMODE_KABI_ITERATE which is checked in iterate_dir().
dnl # When detected ignore this interface and fallback to
dnl # to using fops.readdir() to retain KABI compatibility.
dnl #
AC_MSG_CHECKING([whether fops->iterate() is available])
ZFS_LINUX_TEST_RESULT([file_operations_iterate], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VFS_ITERATE, 1,
[fops->iterate() is available])
],[
AC_MSG_RESULT(no)
dnl #
dnl # readdir interface introduced
dnl #
AC_MSG_CHECKING([whether fops->readdir() is available])
ZFS_LINUX_TEST_RESULT([file_operations_readdir], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VFS_READDIR, 1,
[fops->readdir() is available])
],[
ZFS_LINUX_TEST_ERROR([vfs_iterate])
])
])
])
])