1 files changed, 87 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/config/kernel-inode-setattr.m4 b/sys/contrib/openzfs/config/kernel-inode-setattr.m4
new file mode 100644
index 000000000000..45755b4eb273
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-inode-setattr.m4
@@ -0,0 +1,87 @@
+AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_SETATTR], [
+	dnl #
+	dnl # Linux 6.3 API
+	dnl # The first arg of setattr I/O operations handler type
+	dnl # is changed to struct mnt_idmap*
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_setattr_mnt_idmap], [
+		#include <linux/fs.h>
+
+		int test_setattr(
+		    struct mnt_idmap *idmap,
+		    struct dentry *de, struct iattr *ia)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.setattr = test_setattr,
+		};
+	],[])
+
+	dnl #
+	dnl # Linux 5.12 API
+	dnl # The setattr I/O operations handler type was extended to require
+	dnl # a struct user_namespace* as its first arg, to support idmapped
+	dnl # mounts.
+	dnl #
+	ZFS_LINUX_TEST_SRC([inode_operations_setattr_userns], [
+		#include <linux/fs.h>
+
+		int test_setattr(
+		    struct user_namespace *userns,
+		    struct dentry *de, struct iattr *ia)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.setattr = test_setattr,
+		};
+	],[])
+
+	ZFS_LINUX_TEST_SRC([inode_operations_setattr], [
+		#include <linux/fs.h>
+
+		int test_setattr(
+		    struct dentry *de, struct iattr *ia)
+		    { return 0; }
+
+		static const struct inode_operations
+		    iops __attribute__ ((unused)) = {
+			.setattr = test_setattr,
+		};
+	],[])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_INODE_SETATTR], [
+	dnl #
+	dnl # Kernel 6.3 test
+	dnl #
+	AC_MSG_CHECKING([whether iops->setattr() takes mnt_idmap])
+	ZFS_LINUX_TEST_RESULT([inode_operations_setattr_mnt_idmap], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IDMAP_IOPS_SETATTR, 1,
+		    [iops->setattr() takes struct mnt_idmap*])
+	],[
+		AC_MSG_RESULT(no)
+		dnl #
+		dnl # Kernel 5.12 test
+		dnl #
+		AC_MSG_CHECKING([whether iops->setattr() takes user_namespace])
+		ZFS_LINUX_TEST_RESULT([inode_operations_setattr_userns], [
+			AC_MSG_RESULT(yes)
+			AC_DEFINE(HAVE_USERNS_IOPS_SETATTR, 1,
+			    [iops->setattr() takes struct user_namespace*])
+		],[
+			AC_MSG_RESULT(no)
+
+			AC_MSG_CHECKING([whether iops->setattr() exists])
+			ZFS_LINUX_TEST_RESULT([inode_operations_setattr], [
+				AC_MSG_RESULT(yes)
+				AC_DEFINE(HAVE_IOPS_SETATTR, 1,
+					[iops->setattr() exists])
+			],[
+				AC_MSG_RESULT(no)
+			])
+		])
+	])
+])