[mirror_zfs.git] / config / kernel-xattr-handler.m4

dnl #
dnl # 2.6.35 API change,
dnl # The 'struct xattr_handler' was constified in the generic
dnl # super_block structure.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_CONST_XATTR_HANDLER], [
	AC_MSG_CHECKING([whether super_block uses const struct xattr_handler])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/fs.h>
		#include <linux/xattr.h>

		const struct xattr_handler xattr_test_handler = {
			.prefix	= "test",
			.get	= NULL,
			.set	= NULL,
		};

		const struct xattr_handler *xattr_handlers[] = {
			&xattr_test_handler,
		};

		const struct super_block sb __attribute__ ((unused)) = {
			.s_xattr = xattr_handlers,
		};
	],[
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(HAVE_CONST_XATTR_HANDLER, 1,
		          [super_block uses const struct xattr_handler])
	],[
		AC_MSG_RESULT([no])
	])
])

dnl #
dnl # 4.5 API change,
dnl # struct xattr_handler added new member "name".
dnl # xattr_handler which matches to whole name rather than prefix should use
dnl # "name" instead of "prefix", e.g. "system.posix_acl_access"
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_NAME], [
	AC_MSG_CHECKING([whether xattr_handler has name])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/xattr.h>

		static const struct xattr_handler
		    xops __attribute__ ((unused)) = {
			.name = XATTR_NAME_POSIX_ACL_ACCESS,
		};
	],[
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_XATTR_HANDLER_NAME, 1,
		    [xattr_handler has name])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # Supported xattr handler get() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
	dnl #
	dnl # 4.7 API change,
	dnl # The xattr_handler->get() callback was changed to take both
	dnl # dentry and inode.
	dnl #
	AC_MSG_CHECKING([whether xattr_handler->get() wants both dentry and inode])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/xattr.h>

		int get(const struct xattr_handler *handler,
		    struct dentry *dentry, struct inode *inode,
		    const char *name, void *buffer, size_t size) { return 0; }
		static const struct xattr_handler
		    xops __attribute__ ((unused)) = {
			.get = get,
		};
	],[
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_XATTR_GET_DENTRY_INODE, 1,
		    [xattr_handler->get() wants both dentry and inode])
	],[
		dnl #
		dnl # 4.4 API change,
		dnl # The xattr_handler->get() callback was changed to take a
		dnl # attr_handler, and handler_flags argument was removed and
		dnl # should be accessed by handler->flags.
		dnl #
		AC_MSG_CHECKING([whether xattr_handler->get() wants xattr_handler])
		ZFS_LINUX_TRY_COMPILE([
			#include <linux/xattr.h>

			int get(const struct xattr_handler *handler,
			    struct dentry *dentry, const char *name,
			    void *buffer, size_t size) { return 0; }
			static const struct xattr_handler
			    xops __attribute__ ((unused)) = {
				.get = get,
			};
		],[
		],[
			AC_MSG_RESULT(yes)
			AC_DEFINE(HAVE_XATTR_GET_HANDLER, 1,
			    [xattr_handler->get() wants xattr_handler])
		],[
			dnl #
			dnl # 2.6.33 API change,
			dnl # The xattr_handler->get() callback was changed to take
			dnl # a dentry instead of an inode, and a handler_flags
			dnl # argument was added.
			dnl #
			AC_MSG_RESULT(no)
			AC_MSG_CHECKING([whether xattr_handler->get() wants dentry])
			ZFS_LINUX_TRY_COMPILE([
				#include <linux/xattr.h>

				int get(struct dentry *dentry, const char *name,
				    void *buffer, size_t size, int handler_flags)
				    { return 0; }
				static const struct xattr_handler
				    xops __attribute__ ((unused)) = {
					.get = get,
				};
			],[
			],[
				AC_MSG_RESULT(yes)
				AC_DEFINE(HAVE_XATTR_GET_DENTRY, 1,
				    [xattr_handler->get() wants dentry])
			],[
				dnl #
				dnl # 2.6.32 API
				dnl #
				AC_MSG_RESULT(no)
				AC_MSG_CHECKING(
				    [whether xattr_handler->get() wants inode])
				ZFS_LINUX_TRY_COMPILE([
					#include <linux/xattr.h>

					int get(struct inode *ip, const char *name,
					    void *buffer, size_t size) { return 0; }
					static const struct xattr_handler
					    xops __attribute__ ((unused)) = {
						.get = get,
					};
				],[
				],[
					AC_MSG_RESULT(yes)
					AC_DEFINE(HAVE_XATTR_GET_INODE, 1,
					    [xattr_handler->get() wants inode])
				],[
					AC_MSG_ERROR([no; please file a bug report])
				])
			])
		])
	])
])

dnl #
dnl # Supported xattr handler set() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
	dnl #
	dnl # 4.7 API change,
	dnl # The xattr_handler->set() callback was changed to take both
	dnl # dentry and inode.
	dnl #
	AC_MSG_CHECKING([whether xattr_handler->set() wants both dentry and inode])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/xattr.h>

		int set(const struct xattr_handler *handler,
		    struct dentry *dentry, struct inode *inode,
		    const char *name, const void *buffer,
		    size_t size, int flags)
		    { return 0; }
		static const struct xattr_handler
		    xops __attribute__ ((unused)) = {
			.set = set,
		};
	],[
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1,
		    [xattr_handler->set() wants both dentry and inode])
	],[
		dnl #
		dnl # 4.4 API change,
		dnl # The xattr_handler->set() callback was changed to take a
		dnl # xattr_handler, and handler_flags argument was removed and
		dnl # should be accessed by handler->flags.
		dnl #
		AC_MSG_CHECKING([whether xattr_handler->set() wants xattr_handler])
		ZFS_LINUX_TRY_COMPILE([
			#include <linux/xattr.h>

			int set(const struct xattr_handler *handler,
			    struct dentry *dentry, const char *name,
			    const void *buffer, size_t size, int flags)
			    { return 0; }
			static const struct xattr_handler
			    xops __attribute__ ((unused)) = {
				.set = set,
			};
		],[
		],[
			AC_MSG_RESULT(yes)
			AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1,
			    [xattr_handler->set() wants xattr_handler])
		],[
			dnl #
			dnl # 2.6.33 API change,
			dnl # The xattr_handler->set() callback was changed to take a
			dnl # dentry instead of an inode, and a handler_flags
			dnl # argument was added.
			dnl #
			AC_MSG_RESULT(no)
			AC_MSG_CHECKING([whether xattr_handler->set() wants dentry])
			ZFS_LINUX_TRY_COMPILE([
				#include <linux/xattr.h>

				int set(struct dentry *dentry, const char *name,
				    const void *buffer, size_t size, int flags,
				    int handler_flags) { return 0; }
				static const struct xattr_handler
				    xops __attribute__ ((unused)) = {
					.set = set,
				};
			],[
			],[
				AC_MSG_RESULT(yes)
				AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1,
				    [xattr_handler->set() wants dentry])
			],[
				dnl #
				dnl # 2.6.32 API
				dnl #
				AC_MSG_RESULT(no)
				AC_MSG_CHECKING(
				    [whether xattr_handler->set() wants inode])
				ZFS_LINUX_TRY_COMPILE([
					#include <linux/xattr.h>

					int set(struct inode *ip, const char *name,
					    const void *buffer, size_t size, int flags)
					    { return 0; }
					static const struct xattr_handler
					    xops __attribute__ ((unused)) = {
						.set = set,
					};
				],[
				],[
					AC_MSG_RESULT(yes)
					AC_DEFINE(HAVE_XATTR_SET_INODE, 1,
					    [xattr_handler->set() wants inode])
				],[
		                        AC_MSG_ERROR([no; please file a bug report])
				])
			])
		])
	])
])

dnl #
dnl # Supported xattr handler list() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
	dnl # 4.5 API change,
	dnl # The xattr_handler->list() callback was changed to take only a
	dnl # dentry and it only needs to return if it's accessable.
	AC_MSG_CHECKING([whether xattr_handler->list() wants simple])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/xattr.h>

		bool list(struct dentry *dentry) { return 0; }
		static const struct xattr_handler
		    xops __attribute__ ((unused)) = {
			.list = list,
		};
	],[
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_XATTR_LIST_SIMPLE, 1,
		    [xattr_handler->list() wants simple])
	],[
		dnl #
		dnl # 4.4 API change,
		dnl # The xattr_handler->list() callback was changed to take a
		dnl # xattr_handler, and handler_flags argument was removed
		dnl # and should be accessed by handler->flags.
		dnl #
		AC_MSG_RESULT(no)
		AC_MSG_CHECKING(
		    [whether xattr_handler->list() wants xattr_handler])
		ZFS_LINUX_TRY_COMPILE([
			#include <linux/xattr.h>

			size_t list(const struct xattr_handler *handler,
			    struct dentry *dentry, char *list, size_t list_size,
			    const char *name, size_t name_len) { return 0; }
			static const struct xattr_handler
			    xops __attribute__ ((unused)) = {
				.list = list,
			};
		],[
		],[
			AC_MSG_RESULT(yes)
			AC_DEFINE(HAVE_XATTR_LIST_HANDLER, 1,
			    [xattr_handler->list() wants xattr_handler])
		],[
			dnl #
			dnl # 2.6.33 API change,
			dnl # The xattr_handler->list() callback was changed
			dnl # to take a dentry instead of an inode, and a
			dnl # handler_flags argument was added.
			dnl #
			AC_MSG_RESULT(no)
			AC_MSG_CHECKING(
			    [whether xattr_handler->list() wants dentry])
			ZFS_LINUX_TRY_COMPILE([
				#include <linux/xattr.h>

				size_t list(struct dentry *dentry,
				    char *list, size_t list_size,
				    const char *name, size_t name_len,
				    int handler_flags) { return 0; }
				static const struct xattr_handler
				    xops __attribute__ ((unused)) = {
					.list = list,
				};
			],[
			],[
				AC_MSG_RESULT(yes)
				AC_DEFINE(HAVE_XATTR_LIST_DENTRY, 1,
				    [xattr_handler->list() wants dentry])
			],[
				dnl #
				dnl # 2.6.32 API
				dnl #
				AC_MSG_RESULT(no)
				AC_MSG_CHECKING(
				    [whether xattr_handler->list() wants inode])
				ZFS_LINUX_TRY_COMPILE([
					#include <linux/xattr.h>

					size_t list(struct inode *ip, char *lst,
					    size_t list_size, const char *name,
					    size_t name_len) { return 0; }
					static const struct xattr_handler
					    xops __attribute__ ((unused)) = {
						.list = list,
					};
				],[
				],[
					AC_MSG_RESULT(yes)
					AC_DEFINE(HAVE_XATTR_LIST_INODE, 1,
					    [xattr_handler->list() wants inode])
				],[
		                        AC_MSG_ERROR(
					    [no; please file a bug report])
				])
			])
		])
	])
])

dnl #
dnl # 3.7 API change,
dnl # The posix_acl_{from,to}_xattr functions gained a new
dnl # parameter: user_ns
dnl #
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS], [
	AC_MSG_CHECKING([whether posix_acl_from_xattr() needs user_ns])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/cred.h>
		#include <linux/fs.h>
		#include <linux/posix_acl_xattr.h>
	],[
		posix_acl_from_xattr(&init_user_ns, NULL, 0);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_POSIX_ACL_FROM_XATTR_USERNS, 1,
		    [posix_acl_from_xattr() needs user_ns])
	],[
		AC_MSG_RESULT(no)
	])
])
Commit	Line	Data
	1	dnl #
	2	dnl # 2.6.35 API change,
	3	dnl # The 'struct xattr_handler' was constified in the generic
	4	dnl # super_block structure.
	5	dnl #
	6	AC_DEFUN([ZFS_AC_KERNEL_CONST_XATTR_HANDLER], [
	7	AC_MSG_CHECKING([whether super_block uses const struct xattr_handler])
	8	ZFS_LINUX_TRY_COMPILE([
	9	#include <linux/fs.h>
	10	#include <linux/xattr.h>
	11
	12	const struct xattr_handler xattr_test_handler = {
	13	.prefix = "test",
	14	.get = NULL,
	15	.set = NULL,
	16	};
	17
	18	const struct xattr_handler *xattr_handlers[] = {
	19	&xattr_test_handler,
	20	};
	21
	22	const struct super_block sb __attribute__ ((unused)) = {
	23	.s_xattr = xattr_handlers,
	24	};
	25	],[
	26	],[
	27	AC_MSG_RESULT([yes])
	28	AC_DEFINE(HAVE_CONST_XATTR_HANDLER, 1,
	29	[super_block uses const struct xattr_handler])
	30	],[
	31	AC_MSG_RESULT([no])
	32	])
	33	])
	34
	35	dnl #
	36	dnl # 4.5 API change,
	37	dnl # struct xattr_handler added new member "name".
	38	dnl # xattr_handler which matches to whole name rather than prefix should use
	39	dnl # "name" instead of "prefix", e.g. "system.posix_acl_access"
	40	dnl #
	41	AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_NAME], [
	42	AC_MSG_CHECKING([whether xattr_handler has name])
	43	ZFS_LINUX_TRY_COMPILE([
	44	#include <linux/xattr.h>
	45
	46	static const struct xattr_handler
	47	xops __attribute__ ((unused)) = {
	48	.name = XATTR_NAME_POSIX_ACL_ACCESS,
	49	};
	50	],[
	51	],[
	52	AC_MSG_RESULT(yes)
	53	AC_DEFINE(HAVE_XATTR_HANDLER_NAME, 1,
	54	[xattr_handler has name])
	55	],[
	56	AC_MSG_RESULT(no)
	57	])
	58	])
	59
	60	dnl #
	61	dnl # Supported xattr handler get() interfaces checked newest to oldest.
	62	dnl #
	63	AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
	64	dnl #
	65	dnl # 4.7 API change,
	66	dnl # The xattr_handler->get() callback was changed to take both
	67	dnl # dentry and inode.
	68	dnl #
	69	AC_MSG_CHECKING([whether xattr_handler->get() wants both dentry and inode])
	70	ZFS_LINUX_TRY_COMPILE([
	71	#include <linux/xattr.h>
	72
	73	int get(const struct xattr_handler *handler,
	74	struct dentry dentry, struct inode inode,
	75	const char name, void buffer, size_t size) { return 0; }
	76	static const struct xattr_handler
	77	xops __attribute__ ((unused)) = {
	78	.get = get,
	79	};
	80	],[
	81	],[
	82	AC_MSG_RESULT(yes)
	83	AC_DEFINE(HAVE_XATTR_GET_DENTRY_INODE, 1,
	84	[xattr_handler->get() wants both dentry and inode])
	85	],[
	86	dnl #
	87	dnl # 4.4 API change,
	88	dnl # The xattr_handler->get() callback was changed to take a
	89	dnl # attr_handler, and handler_flags argument was removed and
	90	dnl # should be accessed by handler->flags.
	91	dnl #
	92	AC_MSG_CHECKING([whether xattr_handler->get() wants xattr_handler])
	93	ZFS_LINUX_TRY_COMPILE([
	94	#include <linux/xattr.h>
	95
	96	int get(const struct xattr_handler *handler,
	97	struct dentry dentry, const char name,
	98	void *buffer, size_t size) { return 0; }
	99	static const struct xattr_handler
	100	xops __attribute__ ((unused)) = {
	101	.get = get,
	102	};
	103	],[
	104	],[
	105	AC_MSG_RESULT(yes)
	106	AC_DEFINE(HAVE_XATTR_GET_HANDLER, 1,
	107	[xattr_handler->get() wants xattr_handler])
	108	],[
	109	dnl #
	110	dnl # 2.6.33 API change,
	111	dnl # The xattr_handler->get() callback was changed to take
	112	dnl # a dentry instead of an inode, and a handler_flags
	113	dnl # argument was added.
	114	dnl #
	115	AC_MSG_RESULT(no)
	116	AC_MSG_CHECKING([whether xattr_handler->get() wants dentry])
	117	ZFS_LINUX_TRY_COMPILE([
	118	#include <linux/xattr.h>
	119
	120	int get(struct dentry dentry, const char name,
	121	void *buffer, size_t size, int handler_flags)
	122	{ return 0; }
	123	static const struct xattr_handler
	124	xops __attribute__ ((unused)) = {
	125	.get = get,
	126	};
	127	],[
	128	],[
	129	AC_MSG_RESULT(yes)
	130	AC_DEFINE(HAVE_XATTR_GET_DENTRY, 1,
	131	[xattr_handler->get() wants dentry])
	132	],[
	133	dnl #
	134	dnl # 2.6.32 API
	135	dnl #
	136	AC_MSG_RESULT(no)
	137	AC_MSG_CHECKING(
	138	[whether xattr_handler->get() wants inode])
	139	ZFS_LINUX_TRY_COMPILE([
	140	#include <linux/xattr.h>
	141
	142	int get(struct inode ip, const char name,
	143	void *buffer, size_t size) { return 0; }
	144	static const struct xattr_handler
	145	xops __attribute__ ((unused)) = {
	146	.get = get,
	147	};
	148	],[
	149	],[
	150	AC_MSG_RESULT(yes)
	151	AC_DEFINE(HAVE_XATTR_GET_INODE, 1,
	152	[xattr_handler->get() wants inode])
	153	],[
	154	AC_MSG_ERROR([no; please file a bug report])
	155	])
	156	])
	157	])
	158	])
	159	])
	160
	161	dnl #
	162	dnl # Supported xattr handler set() interfaces checked newest to oldest.
	163	dnl #
	164	AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
	165	dnl #
	166	dnl # 4.7 API change,
	167	dnl # The xattr_handler->set() callback was changed to take both
	168	dnl # dentry and inode.
	169	dnl #
	170	AC_MSG_CHECKING([whether xattr_handler->set() wants both dentry and inode])
	171	ZFS_LINUX_TRY_COMPILE([
	172	#include <linux/xattr.h>
	173
	174	int set(const struct xattr_handler *handler,
	175	struct dentry dentry, struct inode inode,
	176	const char name, const void buffer,
	177	size_t size, int flags)
	178	{ return 0; }
	179	static const struct xattr_handler
	180	xops __attribute__ ((unused)) = {
	181	.set = set,
	182	};
	183	],[
	184	],[
	185	AC_MSG_RESULT(yes)
	186	AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1,
	187	[xattr_handler->set() wants both dentry and inode])
	188	],[
	189	dnl #
	190	dnl # 4.4 API change,
	191	dnl # The xattr_handler->set() callback was changed to take a
	192	dnl # xattr_handler, and handler_flags argument was removed and
	193	dnl # should be accessed by handler->flags.
	194	dnl #
	195	AC_MSG_CHECKING([whether xattr_handler->set() wants xattr_handler])
	196	ZFS_LINUX_TRY_COMPILE([
	197	#include <linux/xattr.h>
	198
	199	int set(const struct xattr_handler *handler,
	200	struct dentry dentry, const char name,
	201	const void *buffer, size_t size, int flags)
	202	{ return 0; }
	203	static const struct xattr_handler
	204	xops __attribute__ ((unused)) = {
	205	.set = set,
	206	};
	207	],[
	208	],[
	209	AC_MSG_RESULT(yes)
	210	AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1,
	211	[xattr_handler->set() wants xattr_handler])
	212	],[
	213	dnl #
	214	dnl # 2.6.33 API change,
	215	dnl # The xattr_handler->set() callback was changed to take a
	216	dnl # dentry instead of an inode, and a handler_flags
	217	dnl # argument was added.
	218	dnl #
	219	AC_MSG_RESULT(no)
	220	AC_MSG_CHECKING([whether xattr_handler->set() wants dentry])
	221	ZFS_LINUX_TRY_COMPILE([
	222	#include <linux/xattr.h>
	223
	224	int set(struct dentry dentry, const char name,
	225	const void *buffer, size_t size, int flags,
	226	int handler_flags) { return 0; }
	227	static const struct xattr_handler
	228	xops __attribute__ ((unused)) = {
	229	.set = set,
	230	};
	231	],[
	232	],[
	233	AC_MSG_RESULT(yes)
	234	AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1,
	235	[xattr_handler->set() wants dentry])
	236	],[
	237	dnl #
	238	dnl # 2.6.32 API
	239	dnl #
	240	AC_MSG_RESULT(no)
	241	AC_MSG_CHECKING(
	242	[whether xattr_handler->set() wants inode])
	243	ZFS_LINUX_TRY_COMPILE([
	244	#include <linux/xattr.h>
	245
	246	int set(struct inode ip, const char name,
	247	const void *buffer, size_t size, int flags)
	248	{ return 0; }
	249	static const struct xattr_handler
	250	xops __attribute__ ((unused)) = {
	251	.set = set,
	252	};
	253	],[
	254	],[
	255	AC_MSG_RESULT(yes)
	256	AC_DEFINE(HAVE_XATTR_SET_INODE, 1,
	257	[xattr_handler->set() wants inode])
	258	],[
	259	AC_MSG_ERROR([no; please file a bug report])
	260	])
	261	])
	262	])
	263	])
	264	])
	265
	266	dnl #
	267	dnl # Supported xattr handler list() interfaces checked newest to oldest.
	268	dnl #
	269	AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
	270	dnl # 4.5 API change,
	271	dnl # The xattr_handler->list() callback was changed to take only a
	272	dnl # dentry and it only needs to return if it's accessable.
	273	AC_MSG_CHECKING([whether xattr_handler->list() wants simple])
	274	ZFS_LINUX_TRY_COMPILE([
	275	#include <linux/xattr.h>
	276
	277	bool list(struct dentry *dentry) { return 0; }
	278	static const struct xattr_handler
	279	xops __attribute__ ((unused)) = {
	280	.list = list,
	281	};
	282	],[
	283	],[
	284	AC_MSG_RESULT(yes)
	285	AC_DEFINE(HAVE_XATTR_LIST_SIMPLE, 1,
	286	[xattr_handler->list() wants simple])
	287	],[
	288	dnl #
	289	dnl # 4.4 API change,
	290	dnl # The xattr_handler->list() callback was changed to take a
	291	dnl # xattr_handler, and handler_flags argument was removed
	292	dnl # and should be accessed by handler->flags.
	293	dnl #
	294	AC_MSG_RESULT(no)
	295	AC_MSG_CHECKING(
	296	[whether xattr_handler->list() wants xattr_handler])
	297	ZFS_LINUX_TRY_COMPILE([
	298	#include <linux/xattr.h>
	299
	300	size_t list(const struct xattr_handler *handler,
	301	struct dentry dentry, char list, size_t list_size,
	302	const char *name, size_t name_len) { return 0; }
	303	static const struct xattr_handler
	304	xops __attribute__ ((unused)) = {
	305	.list = list,
	306	};
	307	],[
	308	],[
	309	AC_MSG_RESULT(yes)
	310	AC_DEFINE(HAVE_XATTR_LIST_HANDLER, 1,
	311	[xattr_handler->list() wants xattr_handler])
	312	],[
	313	dnl #
	314	dnl # 2.6.33 API change,
	315	dnl # The xattr_handler->list() callback was changed
	316	dnl # to take a dentry instead of an inode, and a
	317	dnl # handler_flags argument was added.
	318	dnl #
	319	AC_MSG_RESULT(no)
	320	AC_MSG_CHECKING(
	321	[whether xattr_handler->list() wants dentry])
	322	ZFS_LINUX_TRY_COMPILE([
	323	#include <linux/xattr.h>
	324
	325	size_t list(struct dentry *dentry,
	326	char *list, size_t list_size,
	327	const char *name, size_t name_len,
	328	int handler_flags) { return 0; }
	329	static const struct xattr_handler
	330	xops __attribute__ ((unused)) = {
	331	.list = list,
	332	};
	333	],[
	334	],[
	335	AC_MSG_RESULT(yes)
	336	AC_DEFINE(HAVE_XATTR_LIST_DENTRY, 1,
	337	[xattr_handler->list() wants dentry])
	338	],[
	339	dnl #
	340	dnl # 2.6.32 API
	341	dnl #
	342	AC_MSG_RESULT(no)
	343	AC_MSG_CHECKING(
	344	[whether xattr_handler->list() wants inode])
	345	ZFS_LINUX_TRY_COMPILE([
	346	#include <linux/xattr.h>
	347
	348	size_t list(struct inode ip, char lst,
	349	size_t list_size, const char *name,
	350	size_t name_len) { return 0; }
	351	static const struct xattr_handler
	352	xops __attribute__ ((unused)) = {
	353	.list = list,
	354	};
	355	],[
	356	],[
	357	AC_MSG_RESULT(yes)
	358	AC_DEFINE(HAVE_XATTR_LIST_INODE, 1,
	359	[xattr_handler->list() wants inode])
	360	],[
	361	AC_MSG_ERROR(
	362	[no; please file a bug report])
	363	])
	364	])
	365	])
	366	])
	367	])
	368
	369	dnl #
	370	dnl # 3.7 API change,
	371	dnl # The posix_acl_{from,to}_xattr functions gained a new
	372	dnl # parameter: user_ns
	373	dnl #
	374	AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS], [
	375	AC_MSG_CHECKING([whether posix_acl_from_xattr() needs user_ns])
	376	ZFS_LINUX_TRY_COMPILE([
	377	#include <linux/cred.h>
	378	#include <linux/fs.h>
	379	#include <linux/posix_acl_xattr.h>
	380	],[
	381	posix_acl_from_xattr(&init_user_ns, NULL, 0);
	382	],[
	383	AC_MSG_RESULT(yes)
	384	AC_DEFINE(HAVE_POSIX_ACL_FROM_XATTR_USERNS, 1,
	385	[posix_acl_from_xattr() needs user_ns])
	386	],[
	387	AC_MSG_RESULT(no)
	388	])
	389	])
	390