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1f63c64559
freebsd-nq/config/kernel-acl.m4
Brian Behlendorf 2079111f42
Linux 5.15 compat: get_acl() 
Kernel commits

332f606b32b6 ovl: enable RCU'd ->get_acl()
0cad6246621b vfs: add rcu argument to ->get_acl() callback

Added compatibility code to detect the new ->get_acl() interface
and correctly handle the case where the new rcu argument is set.

Reviewed-by: Coleman Kane <ckane@colemankane.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #12548
2021-09-09 09:38:35 -07:00

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dnl #
dnl # Check if posix_acl_release can be used from a ZFS_META_LICENSED
dnl # module. The is_owner_or_cap macro was replaced by
dnl # inode_owner_or_capable
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_POSIX_ACL_RELEASE], [
ZFS_LINUX_TEST_SRC([posix_acl_release], [
#include <linux/cred.h>
#include <linux/fs.h>
#include <linux/posix_acl.h>
], [
struct posix_acl *tmp = posix_acl_alloc(1, 0);
posix_acl_release(tmp);
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_RELEASE], [
AC_MSG_CHECKING([whether posix_acl_release() is available])
ZFS_LINUX_TEST_RESULT([posix_acl_release], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_POSIX_ACL_RELEASE, 1,
[posix_acl_release() is available])
AC_MSG_CHECKING([whether posix_acl_release() is GPL-only])
ZFS_LINUX_TEST_RESULT([posix_acl_release_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_POSIX_ACL_RELEASE_GPL_ONLY, 1,
[posix_acl_release() is GPL-only])
])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.14 API change,
dnl # set_cached_acl() and forget_cached_acl() changed from inline to
dnl # EXPORT_SYMBOL. In the former case, they may not be usable because of
dnl # posix_acl_release. In the latter case, we can always use them.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_SET_CACHED_ACL_USABLE], [
ZFS_LINUX_TEST_SRC([set_cached_acl], [
#include <linux/cred.h>
#include <linux/fs.h>
#include <linux/posix_acl.h>
], [
struct inode *ip = NULL;
struct posix_acl *acl = posix_acl_alloc(1, 0);
set_cached_acl(ip, ACL_TYPE_ACCESS, acl);
forget_cached_acl(ip, ACL_TYPE_ACCESS);
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_SET_CACHED_ACL_USABLE], [
AC_MSG_CHECKING([whether set_cached_acl() is usable])
ZFS_LINUX_TEST_RESULT([set_cached_acl_license], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_CACHED_ACL_USABLE, 1,
[set_cached_acl() is usable])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.1 API change,
dnl # posix_acl_chmod() was added as the preferred interface.
dnl #
dnl # 3.14 API change,
dnl # posix_acl_chmod() was changed to __posix_acl_chmod()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_POSIX_ACL_CHMOD], [
ZFS_LINUX_TEST_SRC([posix_acl_chmod], [
#include <linux/fs.h>
#include <linux/posix_acl.h>
],[
posix_acl_chmod(NULL, 0, 0)
])
ZFS_LINUX_TEST_SRC([__posix_acl_chmod], [
#include <linux/fs.h>
#include <linux/posix_acl.h>
],[
__posix_acl_chmod(NULL, 0, 0)
])
])
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_CHMOD], [
AC_MSG_CHECKING([whether __posix_acl_chmod exists])
ZFS_LINUX_TEST_RESULT([__posix_acl_chmod], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE___POSIX_ACL_CHMOD, 1,
[__posix_acl_chmod() exists])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether posix_acl_chmod exists])
ZFS_LINUX_TEST_RESULT([posix_acl_chmod], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_POSIX_ACL_CHMOD, 1,
[posix_acl_chmod() exists])
],[
ZFS_LINUX_TEST_ERROR([posix_acl_chmod()])
])
])
])
dnl #
dnl # 3.1 API change,
dnl # posix_acl_equiv_mode now wants an umode_t instead of a mode_t
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T], [
ZFS_LINUX_TEST_SRC([posix_acl_equiv_mode], [
#include <linux/fs.h>
#include <linux/posix_acl.h>
],[
umode_t tmp;
posix_acl_equiv_mode(NULL, &tmp);
])
])
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T], [
AC_MSG_CHECKING([whether posix_acl_equiv_mode() wants umode_t])
ZFS_LINUX_TEST_RESULT([posix_acl_equiv_mode], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([posix_acl_equiv_mode()])
])
])
dnl #
dnl # 4.8 API change,
dnl # The function posix_acl_valid now must be passed a namespace.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_POSIX_ACL_VALID_WITH_NS], [
ZFS_LINUX_TEST_SRC([posix_acl_valid_with_ns], [
#include <linux/fs.h>
#include <linux/posix_acl.h>
],[
struct user_namespace *user_ns = NULL;
const struct posix_acl *acl = NULL;
int error;
error = posix_acl_valid(user_ns, acl);
])
])
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS], [
AC_MSG_CHECKING([whether posix_acl_valid() wants user namespace])
ZFS_LINUX_TEST_RESULT([posix_acl_valid_with_ns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_POSIX_ACL_VALID_WITH_NS, 1,
[posix_acl_valid() wants user namespace])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.1 API change,
dnl # Check if inode_operations contains the function get_acl
dnl #
dnl # 5.15 API change,
dnl # Added the bool rcu argument to get_acl for rcu path walk.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OPERATIONS_GET_ACL], [
ZFS_LINUX_TEST_SRC([inode_operations_get_acl], [
#include <linux/fs.h>
struct posix_acl *get_acl_fn(struct inode *inode, int type)
{ return NULL; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.get_acl = get_acl_fn,
};
],[])
ZFS_LINUX_TEST_SRC([inode_operations_get_acl_rcu], [
#include <linux/fs.h>
struct posix_acl *get_acl_fn(struct inode *inode, int type,
bool rcu) { return NULL; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.get_acl = get_acl_fn,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_GET_ACL], [
AC_MSG_CHECKING([whether iops->get_acl() exists])
ZFS_LINUX_TEST_RESULT([inode_operations_get_acl], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GET_ACL, 1, [iops->get_acl() exists])
],[
ZFS_LINUX_TEST_RESULT([inode_operations_get_acl_rcu], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GET_ACL_RCU, 1, [iops->get_acl() takes rcu])
],[
ZFS_LINUX_TEST_ERROR([iops->get_acl()])
])
])
])
dnl #
dnl # 3.14 API change,
dnl # Check if inode_operations contains the function set_acl
dnl #
dnl # 5.12 API change,
dnl # set_acl() added a user_namespace* parameter first
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OPERATIONS_SET_ACL], [
ZFS_LINUX_TEST_SRC([inode_operations_set_acl_userns], [
#include <linux/fs.h>
int set_acl_fn(struct user_namespace *userns,
struct inode *inode, struct posix_acl *acl,
int type) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.set_acl = set_acl_fn,
};
],[])
ZFS_LINUX_TEST_SRC([inode_operations_set_acl], [
#include <linux/fs.h>
int set_acl_fn(struct inode *inode, struct posix_acl *acl,
int type) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.set_acl = set_acl_fn,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_SET_ACL], [
AC_MSG_CHECKING([whether iops->set_acl() exists])
ZFS_LINUX_TEST_RESULT([inode_operations_set_acl_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists])
AC_DEFINE(HAVE_SET_ACL_USERNS, 1, [iops->set_acl() takes 4 args])
],[
ZFS_LINUX_TEST_RESULT([inode_operations_set_acl], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists, takes 3 args])
],[
AC_MSG_RESULT(no)
])
])
])
dnl #
dnl # 4.7 API change,
dnl # The kernel get_acl will now check cache before calling i_op->get_acl and
dnl # do set_cached_acl after that, so i_op->get_acl don't need to do that
dnl # anymore.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_GET_ACL_HANDLE_CACHE], [
ZFS_LINUX_TEST_SRC([get_acl_handle_cache], [
#include <linux/fs.h>
],[
void *sentinel __attribute__ ((unused)) =
uncached_acl_sentinel(NULL);
])
])
AC_DEFUN([ZFS_AC_KERNEL_GET_ACL_HANDLE_CACHE], [
AC_MSG_CHECKING([whether uncached_acl_sentinel() exists])
ZFS_LINUX_TEST_RESULT([get_acl_handle_cache], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_GET_ACL_HANDLE_CACHE, 1,
[uncached_acl_sentinel() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.16 kernel: check if struct posix_acl acl.a_refcount is a refcount_t.
dnl # It's an atomic_t on older kernels.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_ACL_HAS_REFCOUNT], [
ZFS_LINUX_TEST_SRC([acl_refcount], [
#include <linux/backing-dev.h>
#include <linux/refcount.h>
#include <linux/posix_acl.h>
],[
struct posix_acl acl;
refcount_t *r __attribute__ ((unused)) = &acl.a_refcount;
])
])
AC_DEFUN([ZFS_AC_KERNEL_ACL_HAS_REFCOUNT], [
AC_MSG_CHECKING([whether posix_acl has refcount_t])
ZFS_LINUX_TEST_RESULT([acl_refcount], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_ACL_REFCOUNT, 1, [posix_acl has refcount_t])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_ACL], [
ZFS_AC_KERNEL_SRC_POSIX_ACL_RELEASE
ZFS_AC_KERNEL_SRC_SET_CACHED_ACL_USABLE
ZFS_AC_KERNEL_SRC_POSIX_ACL_CHMOD
ZFS_AC_KERNEL_SRC_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T
ZFS_AC_KERNEL_SRC_POSIX_ACL_VALID_WITH_NS
ZFS_AC_KERNEL_SRC_INODE_OPERATIONS_GET_ACL
ZFS_AC_KERNEL_SRC_INODE_OPERATIONS_SET_ACL
ZFS_AC_KERNEL_SRC_GET_ACL_HANDLE_CACHE
ZFS_AC_KERNEL_SRC_ACL_HAS_REFCOUNT
])
AC_DEFUN([ZFS_AC_KERNEL_ACL], [
ZFS_AC_KERNEL_POSIX_ACL_RELEASE
ZFS_AC_KERNEL_SET_CACHED_ACL_USABLE
ZFS_AC_KERNEL_POSIX_ACL_CHMOD
ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T
ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS
ZFS_AC_KERNEL_INODE_OPERATIONS_GET_ACL
ZFS_AC_KERNEL_INODE_OPERATIONS_SET_ACL
ZFS_AC_KERNEL_GET_ACL_HANDLE_CACHE
ZFS_AC_KERNEL_ACL_HAS_REFCOUNT
])
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