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Linux 5.15 compat: get_acl()

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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
This commit is contained in:
Brian Behlendorf
2021-09-09 09:38:35 -07:00
committed by Tony Hutter
parent 72d16a9b49
commit 7a41ef240a
3 changed files with 52 additions and 9 deletions
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config/kernel-acl.m4
+22 -1
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@@ -162,6 +162,9 @@ 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>
@@ -174,14 +177,32 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OPERATIONS_GET_ACL], [
.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_ERROR([iops->get_acl()])
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()])
])
])
])