[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 <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 = 4,
	ITER_KVEC = 8,
	ITER_BVEC = 16,
	ITER_PIPE = 32,
	ITER_DISCARD = 64,
	ITER_XARRAY = 128,
};

struct iov_iter {
	/*
	 * Bit 0 is the read/write bit, set if we're writing.
	 * Bit 1 is the BVEC_FLAG_NO_REF bit, set if type is a bvec and
	 * the caller isn't expecting to drop a page reference when done.
	 */
	unsigned int type;
	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->type & ~(READ | WRITE);
}

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->type & (READ | WRITE);
}

/*
 * 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 iov_iter_copy_from_user_atomic(struct page *page,
		struct iov_iter *i, unsigned long offset, size_t bytes);
void iov_iter_advance(struct iov_iter *i, size_t bytes);
void iov_iter_revert(struct iov_iter *i, size_t bytes);
int iov_iter_fault_in_readable(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 __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

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

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

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);

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>
607ca46e	10	#include <uapi/linux/uio.h>
1da177e4	11
92236878	12	struct page;
241699cd	13	struct pipe_inode_info;
812ed032 JS	14
	15	struct kvec {
	16	void iov_base; / and that should never hold a userland pointer */
	17	size_t iov_len;
	18	};
	19
00e23707	20	enum iter_type {
875f1d07 JA	21	/* iter types */
	22	ITER_IOVEC = 4,
	23	ITER_KVEC = 8,
	24	ITER_BVEC = 16,
	25	ITER_PIPE = 32,
	26	ITER_DISCARD = 64,
7ff50620	27	ITER_XARRAY = 128,
62a8067a AV	28	};
62a8067a AV	29
92236878	30	struct iov_iter {
875f1d07 JA	31	/*
	32	* Bit 0 is the read/write bit, set if we're writing.
	33	* Bit 1 is the BVEC_FLAG_NO_REF bit, set if type is a bvec and
	34	* the caller isn't expecting to drop a page reference when done.
	35	*/
aa563d7b	36	unsigned int type;
92236878 KO	37	size_t iov_offset;
92236878 KO	38	size_t count;
62a8067a AV	39	union {
62a8067a AV	40	const struct iovec *iov;
a280455f	41	const struct kvec *kvec;
62a8067a	42	const struct bio_vec *bvec;
7ff50620	43	struct xarray *xarray;
241699cd AV	44	struct pipe_inode_info *pipe;
	45	};
	46	union {
	47	unsigned long nr_segs;
27c0e374	48	struct {
8cefc107 DH	49	unsigned int head;
8cefc107 DH	50	unsigned int start_head;
27c0e374	51	};
7ff50620	52	loff_t xarray_start;
62a8067a	53	};
92236878 KO	54	};
92236878 KO	55
00e23707 DH	56	static inline enum iter_type iov_iter_type(const struct iov_iter *i)
00e23707 DH	57	{
b6207430	58	return i->type & ~(READ \| WRITE);
00e23707 DH	59	}
	60
	61	static inline bool iter_is_iovec(const struct iov_iter *i)
	62	{
	63	return iov_iter_type(i) == ITER_IOVEC;
	64	}
	65
	66	static inline bool iov_iter_is_kvec(const struct iov_iter *i)
	67	{
	68	return iov_iter_type(i) == ITER_KVEC;
	69	}
	70
	71	static inline bool iov_iter_is_bvec(const struct iov_iter *i)
	72	{
	73	return iov_iter_type(i) == ITER_BVEC;
	74	}
	75
	76	static inline bool iov_iter_is_pipe(const struct iov_iter *i)
	77	{
	78	return iov_iter_type(i) == ITER_PIPE;
	79	}
	80
9ea9ce04 DH	81	static inline bool iov_iter_is_discard(const struct iov_iter *i)
	82	{
	83	return iov_iter_type(i) == ITER_DISCARD;
	84	}
	85
7ff50620 DH	86	static inline bool iov_iter_is_xarray(const struct iov_iter *i)
	87	{
	88	return iov_iter_type(i) == ITER_XARRAY;
	89	}
	90
00e23707 DH	91	static inline unsigned char iov_iter_rw(const struct iov_iter *i)
	92	{
	93	return i->type & (READ \| WRITE);
	94	}
	95
1da177e4 LT	96	/*
	97	* Total number of bytes covered by an iovec.
	98	*
	99	* NOTE that it is not safe to use this function until all the iovec's
	100	* segment lengths have been validated. Because the individual lengths can
	101	* overflow a size_t when added together.
	102	*/
	103	static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs)
	104	{
	105	unsigned long seg;
	106	size_t ret = 0;
	107
	108	for (seg = 0; seg < nr_segs; seg++)
	109	ret += iov[seg].iov_len;
	110	return ret;
	111	}
	112
92236878 KO	113	static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
	114	{
	115	return (struct iovec) {
	116	.iov_base = iter->iov->iov_base + iter->iov_offset,
	117	.iov_len = min(iter->count,
	118	iter->iov->iov_len - iter->iov_offset),
	119	};
	120	}
	121
92236878 KO	122	size_t iov_iter_copy_from_user_atomic(struct page *page,
92236878 KO	123	struct iov_iter *i, unsigned long offset, size_t bytes);
92236878	124	void iov_iter_advance(struct iov_iter *i, size_t bytes);
27c0e374	125	void iov_iter_revert(struct iov_iter *i, size_t bytes);
92236878 KO	126	int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes);
92236878 KO	127	size_t iov_iter_single_seg_count(const struct iov_iter *i);
6e58e79d AV	128	size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
6e58e79d AV	129	struct iov_iter *i);
f0d1bec9 AV	130	size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
f0d1bec9 AV	131	struct iov_iter *i);
aa28de27 AV	132
	133	size_t _copy_to_iter(const void addr, size_t bytes, struct iov_iter i);
	134	size_t _copy_from_iter(void addr, size_t bytes, struct iov_iter i);
aa28de27	135	size_t _copy_from_iter_nocache(void addr, size_t bytes, struct iov_iter i);
aa28de27 AV	136
	137	static __always_inline __must_check
	138	size_t copy_to_iter(const void addr, size_t bytes, struct iov_iter i)
	139	{
	140	if (unlikely(!check_copy_size(addr, bytes, true)))
c43aeb19	141	return 0;
aa28de27 AV	142	else
	143	return _copy_to_iter(addr, bytes, i);
	144	}
	145
	146	static __always_inline __must_check
	147	size_t copy_from_iter(void addr, size_t bytes, struct iov_iter i)
	148	{
	149	if (unlikely(!check_copy_size(addr, bytes, false)))
c43aeb19	150	return 0;
aa28de27 AV	151	else
	152	return _copy_from_iter(addr, bytes, i);
	153	}
	154
	155	static __always_inline __must_check
	156	bool copy_from_iter_full(void addr, size_t bytes, struct iov_iter i)
	157	{
4b6c132b AV	158	size_t copied = copy_from_iter(addr, bytes, i);
	159	if (likely(copied == bytes))
	160	return true;
	161	iov_iter_revert(i, copied);
	162	return false;
aa28de27 AV	163	}
	164
	165	static __always_inline __must_check
	166	size_t copy_from_iter_nocache(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_nocache(addr, bytes, i);
	172	}
	173
	174	static __always_inline __must_check
	175	bool copy_from_iter_full_nocache(void addr, size_t bytes, struct iov_iter i)
	176	{
4b6c132b AV	177	size_t copied = copy_from_iter_nocache(addr, bytes, i);
	178	if (likely(copied == bytes))
	179	return true;
	180	iov_iter_revert(i, copied);
	181	return false;
aa28de27 AV	182	}
aa28de27 AV	183
0aed55af DW	184	#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
	185	/*
	186	* Note, users like pmem that depend on the stricter semantics of
	187	* copy_from_iter_flushcache() than copy_from_iter_nocache() must check for
	188	* IS_ENABLED(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) before assuming that the
	189	* destination is flushed from the cache on return.
	190	*/
6a37e940	191	size_t _copy_from_iter_flushcache(void addr, size_t bytes, struct iov_iter i);
0aed55af	192	#else
6a37e940 LT	193	#define _copy_from_iter_flushcache _copy_from_iter_nocache
	194	#endif
	195
ec6347bb DW	196	#ifdef CONFIG_ARCH_HAS_COPY_MC
ec6347bb DW	197	size_t _copy_mc_to_iter(const void addr, size_t bytes, struct iov_iter i);
8780356e	198	#else
ec6347bb	199	#define _copy_mc_to_iter _copy_to_iter
8780356e DW	200	#endif
8780356e DW	201
6a37e940 LT	202	static __always_inline __must_check
6a37e940 LT	203	size_t copy_from_iter_flushcache(void addr, size_t bytes, struct iov_iter i)
0aed55af	204	{
6a37e940	205	if (unlikely(!check_copy_size(addr, bytes, false)))
c43aeb19	206	return 0;
6a37e940 LT	207	else
6a37e940 LT	208	return _copy_from_iter_flushcache(addr, bytes, i);
0aed55af	209	}
6a37e940	210
8780356e	211	static __always_inline __must_check
ec6347bb	212	size_t copy_mc_to_iter(void addr, size_t bytes, struct iov_iter i)
8780356e	213	{
dfb06cba	214	if (unlikely(!check_copy_size(addr, bytes, true)))
8780356e DW	215	return 0;
8780356e DW	216	else
ec6347bb	217	return _copy_mc_to_iter(addr, bytes, i);
8780356e DW	218	}
8780356e DW	219
c35e0248	220	size_t iov_iter_zero(size_t bytes, struct iov_iter *);
886a3911	221	unsigned long iov_iter_alignment(const struct iov_iter *i);
357f435d	222	unsigned long iov_iter_gap_alignment(const struct iov_iter *i);
aa563d7b	223	void iov_iter_init(struct iov_iter i, unsigned int direction, const struct iovec iov,
71d8e532	224	unsigned long nr_segs, size_t count);
aa563d7b	225	void iov_iter_kvec(struct iov_iter i, unsigned int direction, const struct kvec kvec,
05afcb77	226	unsigned long nr_segs, size_t count);
aa563d7b	227	void iov_iter_bvec(struct iov_iter i, unsigned int direction, const struct bio_vec bvec,
abb78f87	228	unsigned long nr_segs, size_t count);
aa563d7b	229	void iov_iter_pipe(struct iov_iter i, unsigned int direction, struct pipe_inode_info pipe,
241699cd	230	size_t count);
9ea9ce04	231	void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count);
7ff50620 DH	232	void iov_iter_xarray(struct iov_iter i, unsigned int direction, struct xarray xarray,
7ff50620 DH	233	loff_t start, size_t count);
7b2c99d1	234	ssize_t iov_iter_get_pages(struct iov_iter i, struct page *pages,
2c80929c	235	size_t maxsize, unsigned maxpages, size_t *start);
91f79c43 AV	236	ssize_t iov_iter_get_pages_alloc(struct iov_iter i, struct page **pages,
91f79c43 AV	237	size_t maxsize, size_t *start);
f67da30c	238	int iov_iter_npages(const struct iov_iter *i, int maxpages);
92236878	239
4b8164b9 AV	240	const void dup_iter(struct iov_iter new, struct iov_iter *old, gfp_t flags);
4b8164b9 AV	241
b57332b4	242	static inline size_t iov_iter_count(const struct iov_iter *i)
92236878 KO	243	{
	244	return i->count;
	245	}
	246
0b86dbf6 AV	247	/*
	248	* Cap the iov_iter by given limit; note that the second argument is
	249	* not the new size - it's upper limit for such. Passing it a value
	250	* greater than the amount of data in iov_iter is fine - it'll just do
	251	* nothing in that case.
	252	*/
	253	static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
0c949334	254	{
0b86dbf6 AV	255	/*
	256	* count doesn't have to fit in size_t - comparison extends both
	257	* operands to u64 here and any value that would be truncated by
	258	* conversion in assignement is by definition greater than all
	259	* values of size_t, including old i->count.
	260	*/
0c949334 AV	261	if (i->count > count)
	262	i->count = count;
	263	}
	264
b42b15fd AV	265	/*
	266	* reexpand a previously truncated iterator; count must be no more than how much
	267	* we had shrunk it.
	268	*/
	269	static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
	270	{
	271	i->count = count;
	272	}
52cbd23a WB	273
	274	struct csum_state {
	275	__wsum csum;
	276	size_t off;
	277	};
	278
	279	size_t csum_and_copy_to_iter(const void addr, size_t bytes, void csstate, struct iov_iter *i);
a604ec7e	280	size_t csum_and_copy_from_iter(void addr, size_t bytes, __wsum csum, struct iov_iter *i);
4b6c132b AV	281
	282	static __always_inline __must_check
	283	bool csum_and_copy_from_iter_full(void *addr, size_t bytes,
	284	__wsum csum, struct iov_iter i)
	285	{
	286	size_t copied = csum_and_copy_from_iter(addr, bytes, csum, i);
	287	if (likely(copied == bytes))
	288	return true;
	289	iov_iter_revert(i, copied);
	290	return false;
	291	}
d05f4435 SG	292	size_t hash_and_copy_to_iter(const void addr, size_t bytes, void hashp,
d05f4435 SG	293	struct iov_iter *i);
b42b15fd	294
bfdc5970 CH	295	struct iovec iovec_from_user(const struct iovec __user uvector,
	296	unsigned long nr_segs, unsigned long fast_segs,
	297	struct iovec *fast_iov, bool compat);
	298	ssize_t import_iovec(int type, const struct iovec __user *uvec,
	299	unsigned nr_segs, unsigned fast_segs, struct iovec **iovp,
	300	struct iov_iter *i);
	301	ssize_t __import_iovec(int type, const struct iovec __user *uvec,
	302	unsigned nr_segs, unsigned fast_segs, struct iovec **iovp,
	303	struct iov_iter *i, bool compat);
bc917be8 AV	304	int import_single_range(int type, void __user *buf, size_t len,
	305	struct iovec iov, struct iov_iter i);
	306
812ed032	307	#endif