[linux-block.git] / include / linux / uio.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *	Berkeley style UIO structures	-	Alan Cox 1994.
 */
#ifndef __LINUX_UIO_H
#define __LINUX_UIO_H

#include <linux/kernel.h>
#include <linux/thread_info.h>
#include <linux/mm_types.h>
#include <uapi/linux/uio.h>

struct page;
struct pipe_inode_info;

struct kvec {
	void *iov_base; /* and that should *never* hold a userland pointer */
	size_t iov_len;
};

enum iter_type {
	/* iter types */
	ITER_IOVEC,
	ITER_KVEC,
	ITER_BVEC,
	ITER_PIPE,
	ITER_XARRAY,
	ITER_DISCARD,
};

struct iov_iter_state {
	size_t iov_offset;
	size_t count;
	unsigned long nr_segs;
};

struct iov_iter {
	u8 iter_type;
	bool nofault;
	bool data_source;
	size_t iov_offset;
	size_t count;
	union {
		const struct iovec *iov;
		const struct kvec *kvec;
		const struct bio_vec *bvec;
		struct xarray *xarray;
		struct pipe_inode_info *pipe;
	};
	union {
		unsigned long nr_segs;
		struct {
			unsigned int head;
			unsigned int start_head;
		};
		loff_t xarray_start;
	};
};

static inline enum iter_type iov_iter_type(const struct iov_iter *i)
{
	return i->iter_type;
}

static inline void iov_iter_save_state(struct iov_iter *iter,
				       struct iov_iter_state *state)
{
	state->iov_offset = iter->iov_offset;
	state->count = iter->count;
	state->nr_segs = iter->nr_segs;
}

static inline bool iter_is_iovec(const struct iov_iter *i)
{
	return iov_iter_type(i) == ITER_IOVEC;
}

static inline bool iov_iter_is_kvec(const struct iov_iter *i)
{
	return iov_iter_type(i) == ITER_KVEC;
}

static inline bool iov_iter_is_bvec(const struct iov_iter *i)
{
	return iov_iter_type(i) == ITER_BVEC;
}

static inline bool iov_iter_is_pipe(const struct iov_iter *i)
{
	return iov_iter_type(i) == ITER_PIPE;
}

static inline bool iov_iter_is_discard(const struct iov_iter *i)
{
	return iov_iter_type(i) == ITER_DISCARD;
}

static inline bool iov_iter_is_xarray(const struct iov_iter *i)
{
	return iov_iter_type(i) == ITER_XARRAY;
}

static inline unsigned char iov_iter_rw(const struct iov_iter *i)
{
	return i->data_source ? WRITE : READ;
}

/*
 * Total number of bytes covered by an iovec.
 *
 * NOTE that it is not safe to use this function until all the iovec's
 * segment lengths have been validated.  Because the individual lengths can
 * overflow a size_t when added together.
 */
static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs)
{
	unsigned long seg;
	size_t ret = 0;

	for (seg = 0; seg < nr_segs; seg++)
		ret += iov[seg].iov_len;
	return ret;
}

static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
{
	return (struct iovec) {
		.iov_base = iter->iov->iov_base + iter->iov_offset,
		.iov_len = min(iter->count,
			       iter->iov->iov_len - iter->iov_offset),
	};
}

size_t copy_page_from_iter_atomic(struct page *page, unsigned offset,
				  size_t bytes, struct iov_iter *i);
void iov_iter_advance(struct iov_iter *i, size_t bytes);
void iov_iter_revert(struct iov_iter *i, size_t bytes);
size_t fault_in_iov_iter_readable(const struct iov_iter *i, size_t bytes);
size_t fault_in_iov_iter_writeable(const struct iov_iter *i, size_t bytes);
size_t iov_iter_single_seg_count(const struct iov_iter *i);
size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
			 struct iov_iter *i);
size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
			 struct iov_iter *i);

size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
size_t _copy_from_iter(void *addr, size_t bytes, struct iov_iter *i);
size_t _copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i);

static inline size_t copy_folio_to_iter(struct folio *folio, size_t offset,
		size_t bytes, struct iov_iter *i)
{
	return copy_page_to_iter(&folio->page, offset, bytes, i);
}

static __always_inline __must_check
size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i)
{
	if (unlikely(!check_copy_size(addr, bytes, true)))
		return 0;
	else
		return _copy_to_iter(addr, bytes, i);
}

static __always_inline __must_check
size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i)
{
	if (unlikely(!check_copy_size(addr, bytes, false)))
		return 0;
	else
		return _copy_from_iter(addr, bytes, i);
}

static __always_inline __must_check
bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i)
{
	size_t copied = copy_from_iter(addr, bytes, i);
	if (likely(copied == bytes))
		return true;
	iov_iter_revert(i, copied);
	return false;
}

static __always_inline __must_check
size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i)
{
	if (unlikely(!check_copy_size(addr, bytes, false)))
		return 0;
	else
		return _copy_from_iter_nocache(addr, bytes, i);
}

static __always_inline __must_check
bool copy_from_iter_full_nocache(void *addr, size_t bytes, struct iov_iter *i)
{
	size_t copied = copy_from_iter_nocache(addr, bytes, i);
	if (likely(copied == bytes))
		return true;
	iov_iter_revert(i, copied);
	return false;
}

#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
/*
 * Note, users like pmem that depend on the stricter semantics of
 * _copy_from_iter_flushcache() than _copy_from_iter_nocache() must check for
 * IS_ENABLED(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) before assuming that the
 * destination is flushed from the cache on return.
 */
size_t _copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i);
#else
#define _copy_from_iter_flushcache _copy_from_iter_nocache
#endif

#ifdef CONFIG_ARCH_HAS_COPY_MC
size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
#else
#define _copy_mc_to_iter _copy_to_iter
#endif

size_t iov_iter_zero(size_t bytes, struct iov_iter *);
unsigned long iov_iter_alignment(const struct iov_iter *i);
unsigned long iov_iter_gap_alignment(const struct iov_iter *i);
void iov_iter_init(struct iov_iter *i, unsigned int direction, const struct iovec *iov,
			unsigned long nr_segs, size_t count);
void iov_iter_kvec(struct iov_iter *i, unsigned int direction, const struct kvec *kvec,
			unsigned long nr_segs, size_t count);
void iov_iter_bvec(struct iov_iter *i, unsigned int direction, const struct bio_vec *bvec,
			unsigned long nr_segs, size_t count);
void iov_iter_pipe(struct iov_iter *i, unsigned int direction, struct pipe_inode_info *pipe,
			size_t count);
void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count);
void iov_iter_xarray(struct iov_iter *i, unsigned int direction, struct xarray *xarray,
		     loff_t start, size_t count);
ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
			size_t maxsize, unsigned maxpages, size_t *start);
ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages,
			size_t maxsize, size_t *start);
int iov_iter_npages(const struct iov_iter *i, int maxpages);
void iov_iter_restore(struct iov_iter *i, struct iov_iter_state *state);

const void *dup_iter(struct iov_iter *new, struct iov_iter *old, gfp_t flags);

static inline size_t iov_iter_count(const struct iov_iter *i)
{
	return i->count;
}

/*
 * Cap the iov_iter by given limit; note that the second argument is
 * *not* the new size - it's upper limit for such.  Passing it a value
 * greater than the amount of data in iov_iter is fine - it'll just do
 * nothing in that case.
 */
static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
{
	/*
	 * count doesn't have to fit in size_t - comparison extends both
	 * operands to u64 here and any value that would be truncated by
	 * conversion in assignement is by definition greater than all
	 * values of size_t, including old i->count.
	 */
	if (i->count > count)
		i->count = count;
}

/*
 * reexpand a previously truncated iterator; count must be no more than how much
 * we had shrunk it.
 */
static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
{
	i->count = count;
}

struct csum_state {
	__wsum csum;
	size_t off;
};

size_t csum_and_copy_to_iter(const void *addr, size_t bytes, void *csstate, struct iov_iter *i);
size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);

static __always_inline __must_check
bool csum_and_copy_from_iter_full(void *addr, size_t bytes,
				  __wsum *csum, struct iov_iter *i)
{
	size_t copied = csum_and_copy_from_iter(addr, bytes, csum, i);
	if (likely(copied == bytes))
		return true;
	iov_iter_revert(i, copied);
	return false;
}
size_t hash_and_copy_to_iter(const void *addr, size_t bytes, void *hashp,
		struct iov_iter *i);

struct iovec *iovec_from_user(const struct iovec __user *uvector,
		unsigned long nr_segs, unsigned long fast_segs,
		struct iovec *fast_iov, bool compat);
ssize_t import_iovec(int type, const struct iovec __user *uvec,
		 unsigned nr_segs, unsigned fast_segs, struct iovec **iovp,
		 struct iov_iter *i);
ssize_t __import_iovec(int type, const struct iovec __user *uvec,
		 unsigned nr_segs, unsigned fast_segs, struct iovec **iovp,
		 struct iov_iter *i, bool compat);
int import_single_range(int type, void __user *buf, size_t len,
		 struct iovec *iov, struct iov_iter *i);

#endif
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4 LT	2	/*
1da177e4 LT	3	* Berkeley style UIO structures - Alan Cox 1994.
1da177e4	4	*/
607ca46e DH	5	#ifndef __LINUX_UIO_H
607ca46e DH	6	#define __LINUX_UIO_H
1da177e4	7
92236878	8	#include <linux/kernel.h>
aa28de27	9	#include <linux/thread_info.h>
d9c19d32	10	#include <linux/mm_types.h>
607ca46e	11	#include <uapi/linux/uio.h>
1da177e4	12
92236878	13	struct page;
241699cd	14	struct pipe_inode_info;
812ed032 JS	15
	16	struct kvec {
	17	void iov_base; / and that should never hold a userland pointer */
	18	size_t iov_len;
	19	};
	20
00e23707	21	enum iter_type {
875f1d07	22	/* iter types */
8cd54c1c AV	23	ITER_IOVEC,
	24	ITER_KVEC,
	25	ITER_BVEC,
	26	ITER_PIPE,
	27	ITER_XARRAY,
	28	ITER_DISCARD,
62a8067a AV	29	};
62a8067a AV	30
8fb0f47a JA	31	struct iov_iter_state {
	32	size_t iov_offset;
	33	size_t count;
	34	unsigned long nr_segs;
	35	};
	36
92236878	37	struct iov_iter {
8cd54c1c	38	u8 iter_type;
3337ab08	39	bool nofault;
8cd54c1c	40	bool data_source;
92236878 KO	41	size_t iov_offset;
92236878 KO	42	size_t count;
62a8067a AV	43	union {
62a8067a AV	44	const struct iovec *iov;
a280455f	45	const struct kvec *kvec;
62a8067a	46	const struct bio_vec *bvec;
7ff50620	47	struct xarray *xarray;
241699cd AV	48	struct pipe_inode_info *pipe;
	49	};
	50	union {
	51	unsigned long nr_segs;
27c0e374	52	struct {
8cefc107 DH	53	unsigned int head;
8cefc107 DH	54	unsigned int start_head;
27c0e374	55	};
7ff50620	56	loff_t xarray_start;
62a8067a	57	};
92236878 KO	58	};
92236878 KO	59
00e23707 DH	60	static inline enum iter_type iov_iter_type(const struct iov_iter *i)
00e23707 DH	61	{
8cd54c1c	62	return i->iter_type;
00e23707 DH	63	}
00e23707 DH	64
8fb0f47a JA	65	static inline void iov_iter_save_state(struct iov_iter *iter,
	66	struct iov_iter_state *state)
	67	{
	68	state->iov_offset = iter->iov_offset;
	69	state->count = iter->count;
	70	state->nr_segs = iter->nr_segs;
	71	}
	72
00e23707 DH	73	static inline bool iter_is_iovec(const struct iov_iter *i)
	74	{
	75	return iov_iter_type(i) == ITER_IOVEC;
	76	}
	77
	78	static inline bool iov_iter_is_kvec(const struct iov_iter *i)
	79	{
	80	return iov_iter_type(i) == ITER_KVEC;
	81	}
	82
	83	static inline bool iov_iter_is_bvec(const struct iov_iter *i)
	84	{
	85	return iov_iter_type(i) == ITER_BVEC;
	86	}
	87
	88	static inline bool iov_iter_is_pipe(const struct iov_iter *i)
	89	{
	90	return iov_iter_type(i) == ITER_PIPE;
	91	}
	92
9ea9ce04 DH	93	static inline bool iov_iter_is_discard(const struct iov_iter *i)
	94	{
	95	return iov_iter_type(i) == ITER_DISCARD;
	96	}
	97
7ff50620 DH	98	static inline bool iov_iter_is_xarray(const struct iov_iter *i)
	99	{
	100	return iov_iter_type(i) == ITER_XARRAY;
	101	}
	102
00e23707 DH	103	static inline unsigned char iov_iter_rw(const struct iov_iter *i)
00e23707 DH	104	{
8cd54c1c	105	return i->data_source ? WRITE : READ;
00e23707 DH	106	}
00e23707 DH	107
1da177e4 LT	108	/*
	109	* Total number of bytes covered by an iovec.
	110	*
	111	* NOTE that it is not safe to use this function until all the iovec's
	112	* segment lengths have been validated. Because the individual lengths can
	113	* overflow a size_t when added together.
	114	*/
	115	static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs)
	116	{
	117	unsigned long seg;
	118	size_t ret = 0;
	119
	120	for (seg = 0; seg < nr_segs; seg++)
	121	ret += iov[seg].iov_len;
	122	return ret;
	123	}
	124
92236878 KO	125	static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
	126	{
	127	return (struct iovec) {
	128	.iov_base = iter->iov->iov_base + iter->iov_offset,
	129	.iov_len = min(iter->count,
	130	iter->iov->iov_len - iter->iov_offset),
	131	};
	132	}
	133
f0b65f39 AV	134	size_t copy_page_from_iter_atomic(struct page *page, unsigned offset,
f0b65f39 AV	135	size_t bytes, struct iov_iter *i);
92236878	136	void iov_iter_advance(struct iov_iter *i, size_t bytes);
27c0e374	137	void iov_iter_revert(struct iov_iter *i, size_t bytes);
a6294593	138	size_t fault_in_iov_iter_readable(const struct iov_iter *i, size_t bytes);
cdd591fc	139	size_t fault_in_iov_iter_writeable(const struct iov_iter *i, size_t bytes);
92236878	140	size_t iov_iter_single_seg_count(const struct iov_iter *i);
6e58e79d AV	141	size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
6e58e79d AV	142	struct iov_iter *i);
f0d1bec9 AV	143	size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
f0d1bec9 AV	144	struct iov_iter *i);
aa28de27 AV	145
	146	size_t _copy_to_iter(const void addr, size_t bytes, struct iov_iter i);
	147	size_t _copy_from_iter(void addr, size_t bytes, struct iov_iter i);
aa28de27	148	size_t _copy_from_iter_nocache(void addr, size_t bytes, struct iov_iter i);
aa28de27	149
d9c19d32 MWO	150	static inline size_t copy_folio_to_iter(struct folio *folio, size_t offset,
	151	size_t bytes, struct iov_iter *i)
	152	{
	153	return copy_page_to_iter(&folio->page, offset, bytes, i);
	154	}
	155
aa28de27 AV	156	static __always_inline __must_check
	157	size_t copy_to_iter(const void addr, size_t bytes, struct iov_iter i)
	158	{
	159	if (unlikely(!check_copy_size(addr, bytes, true)))
c43aeb19	160	return 0;
aa28de27 AV	161	else
	162	return _copy_to_iter(addr, bytes, i);
	163	}
	164
	165	static __always_inline __must_check
	166	size_t copy_from_iter(void addr, size_t bytes, struct iov_iter i)
	167	{
	168	if (unlikely(!check_copy_size(addr, bytes, false)))
c43aeb19	169	return 0;
aa28de27 AV	170	else
	171	return _copy_from_iter(addr, bytes, i);
	172	}
	173
	174	static __always_inline __must_check
	175	bool copy_from_iter_full(void addr, size_t bytes, struct iov_iter i)
	176	{
4b6c132b AV	177	size_t copied = copy_from_iter(addr, bytes, i);
	178	if (likely(copied == bytes))
	179	return true;
	180	iov_iter_revert(i, copied);
	181	return false;
aa28de27 AV	182	}
	183
	184	static __always_inline __must_check
	185	size_t copy_from_iter_nocache(void addr, size_t bytes, struct iov_iter i)
	186	{
	187	if (unlikely(!check_copy_size(addr, bytes, false)))
c43aeb19	188	return 0;
aa28de27 AV	189	else
	190	return _copy_from_iter_nocache(addr, bytes, i);
	191	}
	192
	193	static __always_inline __must_check
	194	bool copy_from_iter_full_nocache(void addr, size_t bytes, struct iov_iter i)
	195	{
4b6c132b AV	196	size_t copied = copy_from_iter_nocache(addr, bytes, i);
	197	if (likely(copied == bytes))
	198	return true;
	199	iov_iter_revert(i, copied);
	200	return false;
aa28de27 AV	201	}
aa28de27 AV	202
0aed55af DW	203	#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
	204	/*
	205	* Note, users like pmem that depend on the stricter semantics of
e17f7a0b	206	* _copy_from_iter_flushcache() than _copy_from_iter_nocache() must check for
0aed55af DW	207	* IS_ENABLED(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) before assuming that the
	208	* destination is flushed from the cache on return.
	209	*/
6a37e940	210	size_t _copy_from_iter_flushcache(void addr, size_t bytes, struct iov_iter i);
0aed55af	211	#else
6a37e940 LT	212	#define _copy_from_iter_flushcache _copy_from_iter_nocache
	213	#endif
	214
ec6347bb DW	215	#ifdef CONFIG_ARCH_HAS_COPY_MC
ec6347bb DW	216	size_t _copy_mc_to_iter(const void addr, size_t bytes, struct iov_iter i);
8780356e	217	#else
ec6347bb	218	#define _copy_mc_to_iter _copy_to_iter
8780356e DW	219	#endif
8780356e DW	220
c35e0248	221	size_t iov_iter_zero(size_t bytes, struct iov_iter *);
886a3911	222	unsigned long iov_iter_alignment(const struct iov_iter *i);
357f435d	223	unsigned long iov_iter_gap_alignment(const struct iov_iter *i);
aa563d7b	224	void iov_iter_init(struct iov_iter i, unsigned int direction, const struct iovec iov,
71d8e532	225	unsigned long nr_segs, size_t count);
aa563d7b	226	void iov_iter_kvec(struct iov_iter i, unsigned int direction, const struct kvec kvec,
05afcb77	227	unsigned long nr_segs, size_t count);
aa563d7b	228	void iov_iter_bvec(struct iov_iter i, unsigned int direction, const struct bio_vec bvec,
abb78f87	229	unsigned long nr_segs, size_t count);
aa563d7b	230	void iov_iter_pipe(struct iov_iter i, unsigned int direction, struct pipe_inode_info pipe,
241699cd	231	size_t count);
9ea9ce04	232	void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count);
7ff50620 DH	233	void iov_iter_xarray(struct iov_iter i, unsigned int direction, struct xarray xarray,
7ff50620 DH	234	loff_t start, size_t count);
7b2c99d1	235	ssize_t iov_iter_get_pages(struct iov_iter i, struct page *pages,
2c80929c	236	size_t maxsize, unsigned maxpages, size_t *start);
91f79c43 AV	237	ssize_t iov_iter_get_pages_alloc(struct iov_iter i, struct page **pages,
91f79c43 AV	238	size_t maxsize, size_t *start);
f67da30c	239	int iov_iter_npages(const struct iov_iter *i, int maxpages);
8fb0f47a	240	void iov_iter_restore(struct iov_iter i, struct iov_iter_state state);
92236878	241
4b8164b9 AV	242	const void dup_iter(struct iov_iter new, struct iov_iter *old, gfp_t flags);
4b8164b9 AV	243
b57332b4	244	static inline size_t iov_iter_count(const struct iov_iter *i)
92236878 KO	245	{
	246	return i->count;
	247	}
	248
0b86dbf6 AV	249	/*
	250	* Cap the iov_iter by given limit; note that the second argument is
	251	* not the new size - it's upper limit for such. Passing it a value
	252	* greater than the amount of data in iov_iter is fine - it'll just do
	253	* nothing in that case.
	254	*/
	255	static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
0c949334	256	{
0b86dbf6 AV	257	/*
	258	* count doesn't have to fit in size_t - comparison extends both
	259	* operands to u64 here and any value that would be truncated by
	260	* conversion in assignement is by definition greater than all
	261	* values of size_t, including old i->count.
	262	*/
7dedd3e1	263	if (i->count > count)
0c949334 AV	264	i->count = count;
	265	}
	266
b42b15fd AV	267	/*
	268	* reexpand a previously truncated iterator; count must be no more than how much
	269	* we had shrunk it.
	270	*/
	271	static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
	272	{
	273	i->count = count;
	274	}
52cbd23a WB	275
	276	struct csum_state {
	277	__wsum csum;
	278	size_t off;
	279	};
	280
	281	size_t csum_and_copy_to_iter(const void addr, size_t bytes, void csstate, struct iov_iter *i);
a604ec7e	282	size_t csum_and_copy_from_iter(void addr, size_t bytes, __wsum csum, struct iov_iter *i);
4b6c132b AV	283
	284	static __always_inline __must_check
	285	bool csum_and_copy_from_iter_full(void *addr, size_t bytes,
	286	__wsum csum, struct iov_iter i)
	287	{
	288	size_t copied = csum_and_copy_from_iter(addr, bytes, csum, i);
	289	if (likely(copied == bytes))
	290	return true;
	291	iov_iter_revert(i, copied);
	292	return false;
	293	}
d05f4435 SG	294	size_t hash_and_copy_to_iter(const void addr, size_t bytes, void hashp,
d05f4435 SG	295	struct iov_iter *i);
b42b15fd	296
bfdc5970 CH	297	struct iovec iovec_from_user(const struct iovec __user uvector,
	298	unsigned long nr_segs, unsigned long fast_segs,
	299	struct iovec *fast_iov, bool compat);
	300	ssize_t import_iovec(int type, const struct iovec __user *uvec,
	301	unsigned nr_segs, unsigned fast_segs, struct iovec **iovp,
	302	struct iov_iter *i);
	303	ssize_t __import_iovec(int type, const struct iovec __user *uvec,
	304	unsigned nr_segs, unsigned fast_segs, struct iovec **iovp,
	305	struct iov_iter *i, bool compat);
bc917be8 AV	306	int import_single_range(int type, void __user *buf, size_t len,
	307	struct iovec iov, struct iov_iter i);
	308
812ed032	309	#endif