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Last change on this file since dab09ad was 97c3159, checked in by Andrew Beach <ajbeach@…>, 5 years ago
Fixed some tab/space confusion.
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File size: 19.1 KB

Rev	Line
[31bb2e1]	1	//
	2	// Cforall Version 1.0.0 Copyright (C) 2020 University of Waterloo
	3	//
	4	// The contents of this file are covered under the licence agreement in the
	5	// file "LICENCE" distributed with Cforall.
	6	//
	7	// iocall.cfa --
	8	//
	9	// Author : Thierry Delisle
	10	// Created On : Wed Jul 1 14:51:00 2020
	11	// Last Modified By :
	12	// Last Modified On :
	13	// Update Count :
	14	//
	15
[3e2b9c9]	16	#define __cforall_thread__
	17
[5877b3e]	18	#include "bits/defs.hfa"
[1a39a5a]	19	#include "kernel.hfa"
[5877b3e]	20
[4b84e35]	21	//=============================================================================================
	22	// I/O uring backend
	23	//=============================================================================================
	24
[5751a56]	25	#if defined(CFA_HAVE_LINUX_IO_URING_H)
[3e2b9c9]	26	#include <assert.h>
[31bb2e1]	27	#include <stdint.h>
[f00b26d4]	28	#include <errno.h>
[31bb2e1]	29	#include <linux/io_uring.h>
	30
[3e2b9c9]	31	#include "kernel/fwd.hfa"
	32	#include "io/types.hfa"
[31bb2e1]	33
	34	extern [* struct io_uring_sqe, uint32_t] __submit_alloc( struct __io_data & ring, uint64_t data );
[f00b26d4]	35	extern void __submit( struct io_context * ctx, uint32_t idx ) __attribute__((nonnull (1)));
[31bb2e1]	36
[4b84e35]	37	static inline void ?{}(struct io_uring_sqe & this, uint8_t opcode, int fd) {
	38	this.opcode = opcode;
	39	#if !defined(IOSQE_ASYNC)
	40	this.flags = 0;
	41	#else
	42	this.flags = IOSQE_ASYNC;
	43	#endif
	44	this.ioprio = 0;
	45	this.fd = fd;
	46	this.off = 0;
	47	this.addr = 0;
	48	this.len = 0;
	49	this.rw_flags = 0;
	50	this.__pad2[0] = this.__pad2[1] = this.__pad2[2] = 0;
	51	}
	52
	53	static inline void ?{}(struct io_uring_sqe & this, uint8_t opcode, int fd, void * addr, uint32_t len, uint64_t off ) {
	54	(this){ opcode, fd };
	55	this.off = off;
	56	this.addr = (uint64_t)(uintptr_t)addr;
	57	this.len = len;
	58	}
[31bb2e1]	59
[3e2b9c9]	60	static inline io_context * __get_io_context( void ) {
	61	cluster * cltr = active_cluster();
	62	/* paranoid */ verifyf( cltr, "No active cluster for io operation\n");
	63	assertf( cltr->io.cnt > 0, "Cluster %p has no default io contexts and no context was specified\n", cltr );
	64	/* paranoid */ verifyf( cltr->io.ctxs, "default io contexts for cluster %p are missing\n", cltr);
	65	return &cltr->io.ctxs[ __tls_rand() % cltr->io.cnt ];
	66	}
[f00b26d4]	67
	68
[97c3159]	69	#if defined(CFA_HAVE_IOSQE_FIXED_FILE) && defined(CFA_HAVE_IOSQE_IO_DRAIN) && defined(CFA_HAVE_IOSQE_ASYNC)
[f00b26d4]	70	#define REGULAR_FLAGS (IOSQE_FIXED_FILE \| IOSQE_IO_DRAIN \| IOSQE_ASYNC)
	71	#elif defined(CFA_HAVE_IOSQE_FIXED_FILE) && defined(CFA_HAVE_IOSQE_ASYNC)
	72	#define REGULAR_FLAGS (IOSQE_FIXED_FILE \| IOSQE_ASYNC)
[97c3159]	73	#elif defined(CFA_HAVE_IOSQE_FIXED_FILE) && defined(CFA_HAVE_IOSQE_IO_DRAIN)
[f00b26d4]	74	#define REGULAR_FLAGS (IOSQE_FIXED_FILE \| IOSQE_IO_DRAIN)
[97c3159]	75	#elif defined(CFA_HAVE_IOSQE_IO_DRAIN) && defined(CFA_HAVE_IOSQE_ASYNC)
[f00b26d4]	76	#define REGULAR_FLAGS (IOSQE_IO_DRAIN \| IOSQE_ASYNC)
	77	#elif defined(CFA_HAVE_IOSQE_FIXED_FILE)
	78	#define REGULAR_FLAGS (IOSQE_FIXED_FILE)
[97c3159]	79	#elif defined(CFA_HAVE_IOSQE_IO_DRAIN)
[f00b26d4]	80	#define REGULAR_FLAGS (IOSQE_IO_DRAIN)
[97c3159]	81	#elif defined(CFA_HAVE_IOSQE_ASYNC)
[f00b26d4]	82	#define REGULAR_FLAGS (IOSQE_ASYNC)
	83	#else
	84	#define REGULAR_FLAGS (0)
	85	#endif
	86
	87	#if defined(CFA_HAVE_IOSQE_IO_LINK) && defined(CFA_HAVE_IOSQE_IO_HARDLINK)
	88	#define LINK_FLAGS (IOSQE_IO_LINK \| IOSQE_IO_HARDLINK)
	89	#elif defined(CFA_HAVE_IOSQE_IO_LINK)
	90	#define LINK_FLAGS (IOSQE_IO_LINK)
	91	#elif defined(CFA_HAVE_IOSQE_IO_HARDLINK)
	92	#define LINK_FLAGS (IOSQE_IO_HARDLINK)
	93	#else
	94	#define LINK_FLAGS (0)
	95	#endif
	96
	97	#if defined(CFA_HAVE_SPLICE_F_FD_IN_FIXED)
	98	#define SPLICE_FLAGS (SPLICE_F_FD_IN_FIXED)
	99	#else
	100	#define SPLICE_FLAGS (0)
	101	#endif
	102
	103
[31bb2e1]	104	#define __submit_prelude \
[f00b26d4]	105	if( 0 != (submit_flags & LINK_FLAGS) ) { errno = ENOTSUP; return -1; } \
	106	(void)timeout; (void)cancellation; \
	107	if( !context ) context = __get_io_context(); \
[31bb2e1]	108	__io_user_data_t data = { 0, active_thread() }; \
[f00b26d4]	109	struct __io_data & ring = *context->thrd.ring; \
[31bb2e1]	110	struct io_uring_sqe * sqe; \
	111	uint32_t idx; \
[f00b26d4]	112	[sqe, idx] = __submit_alloc( ring, (uint64_t)(uintptr_t)&data ); \
	113	sqe->flags = REGULAR_FLAGS & submit_flags;
[31bb2e1]	114
	115	#define __submit_wait \
	116	/__cfaabi_bits_print_safe( STDERR_FILENO, "Preparing user data %p for %p\n", &data, data.thrd );/ \
	117	verify( sqe->user_data == (uint64_t)(uintptr_t)&data ); \
[f00b26d4]	118	__submit( context, idx ); \
[31bb2e1]	119	park( __cfaabi_dbg_ctx ); \
[f00b26d4]	120	if( data.result < 0 ) { \
	121	errno = -data.result; \
	122	return -1; \
	123	} \
[31bb2e1]	124	return data.result;
[4b84e35]	125	#endif
[31bb2e1]	126
[4b84e35]	127	//=============================================================================================
	128	// I/O Forwards
	129	//=============================================================================================
[f00b26d4]	130	#include <time.hfa>
[31bb2e1]	131
[4b84e35]	132	// Some forward declarations
[cf48a14]	133	#include <errno.h>
[4b84e35]	134	#include <unistd.h>
	135
	136	extern "C" {
	137	#include <sys/types.h>
	138	#include <sys/socket.h>
	139	#include <sys/syscall.h>
	140
	141	#if defined(HAVE_PREADV2)
	142	struct iovec;
	143	extern ssize_t preadv2 (int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags);
	144	#endif
	145	#if defined(HAVE_PWRITEV2)
	146	struct iovec;
	147	extern ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags);
	148	#endif
	149
	150	extern int fsync(int fd);
	151	extern int sync_file_range(int fd, int64_t offset, int64_t nbytes, unsigned int flags);
	152
	153	struct msghdr;
	154	struct sockaddr;
	155	extern ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags);
	156	extern ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags);
	157	extern ssize_t send(int sockfd, const void *buf, size_t len, int flags);
	158	extern ssize_t recv(int sockfd, void *buf, size_t len, int flags);
	159	extern int accept4(int sockfd, struct sockaddr addr, socklen_t addrlen, int flags);
	160	extern int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
	161
	162	extern int fallocate(int fd, int mode, uint64_t offset, uint64_t len);
	163	extern int posix_fadvise(int fd, uint64_t offset, uint64_t len, int advice);
	164	extern int madvise(void *addr, size_t length, int advice);
	165
	166	extern int openat(int dirfd, const char *pathname, int flags, mode_t mode);
	167	extern int close(int fd);
	168
	169	extern ssize_t read (int fd, void *buf, size_t count);
[0a92c78]	170
	171	extern ssize_t splice(int fd_in, loff_t off_in, int fd_out, loff_t off_out, size_t len, unsigned int flags);
	172	extern ssize_t tee(int fd_in, int fd_out, size_t len, unsigned int flags);
[4b84e35]	173	}
[31bb2e1]	174
[4b84e35]	175	//=============================================================================================
	176	// I/O Interface
	177	//=============================================================================================
[31bb2e1]	178
[4b84e35]	179	//-----------------------------------------------------------------------------
	180	// Asynchronous operations
	181	#if defined(HAVE_PREADV2)
[f00b26d4]	182	ssize_t cfa_preadv2(int fd, const struct iovec iov, int iovcnt, off_t offset, int flags, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	183	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_READV)
[20ab637]	184	return preadv2(fd, iov, iovcnt, offset, flags);
	185	#else
	186	__submit_prelude
	187
	188	(*sqe){ IORING_OP_READV, fd, iov, iovcnt, offset };
	189
	190	__submit_wait
	191	#endif
	192	}
[4b84e35]	193	#endif
[31bb2e1]	194
[4b84e35]	195	#if defined(HAVE_PWRITEV2)
[f00b26d4]	196	ssize_t cfa_pwritev2(int fd, const struct iovec iov, int iovcnt, off_t offset, int flags, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	197	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_WRITEV)
[4b84e35]	198	return pwritev2(fd, iov, iovcnt, offset, flags);
[31bb2e1]	199	#else
	200	__submit_prelude
	201
[4b84e35]	202	(*sqe){ IORING_OP_WRITEV, fd, iov, iovcnt, offset };
[31bb2e1]	203
	204	__submit_wait
	205	#endif
	206	}
[4b84e35]	207	#endif
[31bb2e1]	208
[f00b26d4]	209	int cfa_fsync(int fd, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	210	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_FSYNC)
[4b84e35]	211	return fsync(fd);
	212	#else
	213	__submit_prelude
[31bb2e1]	214
[4b84e35]	215	(*sqe){ IORING_OP_FSYNC, fd };
[31bb2e1]	216
[4b84e35]	217	__submit_wait
	218	#endif
	219	}
[31bb2e1]	220
[f00b26d4]	221	int cfa_sync_file_range(int fd, int64_t offset, int64_t nbytes, unsigned int flags, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	222	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_SYNC_FILE_RANGE)
[4b84e35]	223	return sync_file_range(fd, offset, nbytes, flags);
	224	#else
	225	__submit_prelude
[31bb2e1]	226
[4b84e35]	227	(*sqe){ IORING_OP_SYNC_FILE_RANGE, fd };
	228	sqe->off = offset;
	229	sqe->len = nbytes;
	230	sqe->sync_range_flags = flags;
[31bb2e1]	231
[4b84e35]	232	__submit_wait
	233	#endif
	234	}
[31bb2e1]	235
	236
[f00b26d4]	237	ssize_t cfa_sendmsg(int sockfd, const struct msghdr msg, int flags, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	238	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_SENDMSG)
[4b84e35]	239	return sendmsg(sockfd, msg, flags);
	240	#else
	241	__submit_prelude
[31bb2e1]	242
[4b84e35]	243	(*sqe){ IORING_OP_SENDMSG, sockfd, msg, 1, 0 };
	244	sqe->msg_flags = flags;
[31bb2e1]	245
[4b84e35]	246	__submit_wait
	247	#endif
	248	}
[31bb2e1]	249
[f00b26d4]	250	ssize_t cfa_recvmsg(int sockfd, struct msghdr msg, int flags, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	251	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_RECVMSG)
[4b84e35]	252	return recvmsg(sockfd, msg, flags);
	253	#else
	254	__submit_prelude
[31bb2e1]	255
[4b84e35]	256	(*sqe){ IORING_OP_RECVMSG, sockfd, msg, 1, 0 };
	257	sqe->msg_flags = flags;
[31bb2e1]	258
[4b84e35]	259	__submit_wait
	260	#endif
	261	}
[31bb2e1]	262
[f00b26d4]	263	ssize_t cfa_send(int sockfd, const void buf, size_t len, int flags, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	264	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_SEND)
[4b84e35]	265	return send( sockfd, buf, len, flags );
	266	#else
	267	__submit_prelude
[31bb2e1]	268
[4b84e35]	269	(*sqe){ IORING_OP_SEND, sockfd };
	270	sqe->addr = (uint64_t)buf;
	271	sqe->len = len;
	272	sqe->msg_flags = flags;
[31bb2e1]	273
[4b84e35]	274	__submit_wait
	275	#endif
	276	}
[31bb2e1]	277
[f00b26d4]	278	ssize_t cfa_recv(int sockfd, void buf, size_t len, int flags, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	279	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_RECV)
[4b84e35]	280	return recv( sockfd, buf, len, flags );
	281	#else
	282	__submit_prelude
[31bb2e1]	283
[4b84e35]	284	(*sqe){ IORING_OP_RECV, sockfd };
	285	sqe->addr = (uint64_t)buf;
	286	sqe->len = len;
	287	sqe->msg_flags = flags;
[31bb2e1]	288
[4b84e35]	289	__submit_wait
	290	#endif
	291	}
[31bb2e1]	292
[f00b26d4]	293	int cfa_accept4(int sockfd, struct sockaddr addr, socklen_t addrlen, int flags, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	294	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_ACCEPT)
[4b84e35]	295	return accept4( sockfd, addr, addrlen, flags );
	296	#else
	297	__submit_prelude
[31bb2e1]	298
[4b84e35]	299	(*sqe){ IORING_OP_ACCEPT, sockfd };
[3f850d7]	300	sqe->addr = (uint64_t)(uintptr_t)addr;
	301	sqe->addr2 = (uint64_t)(uintptr_t)addrlen;
[4b84e35]	302	sqe->accept_flags = flags;
[31bb2e1]	303
[4b84e35]	304	__submit_wait
	305	#endif
	306	}
[31bb2e1]	307
[f00b26d4]	308	int cfa_connect(int sockfd, const struct sockaddr addr, socklen_t addrlen, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	309	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_CONNECT)
[4b84e35]	310	return connect( sockfd, addr, addrlen );
	311	#else
	312	__submit_prelude
[31bb2e1]	313
[4b84e35]	314	(*sqe){ IORING_OP_CONNECT, sockfd };
[3f850d7]	315	sqe->addr = (uint64_t)(uintptr_t)addr;
	316	sqe->off = (uint64_t)(uintptr_t)addrlen;
[31bb2e1]	317
[4b84e35]	318	__submit_wait
	319	#endif
	320	}
[31bb2e1]	321
[f00b26d4]	322	int cfa_fallocate(int fd, int mode, uint64_t offset, uint64_t len, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	323	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_FALLOCATE)
[4b84e35]	324	return fallocate( fd, mode, offset, len );
	325	#else
	326	__submit_prelude
[31bb2e1]	327
[85eafc5]	328	#warning FALLOCATE documentation for linux 5.7 is incorrect, and does not handle mode
[3f850d7]	329
[4b84e35]	330	(*sqe){ IORING_OP_FALLOCATE, fd };
	331	sqe->off = offset;
[3f850d7]	332	sqe->len = mode;
	333	sqe->addr = len;
[31bb2e1]	334
[4b84e35]	335	__submit_wait
	336	#endif
	337	}
[31bb2e1]	338
[f00b26d4]	339	int cfa_fadvise(int fd, uint64_t offset, uint64_t len, int advice, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	340	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_FADVISE)
[4b84e35]	341	return posix_fadvise( fd, offset, len, advice );
	342	#else
	343	__submit_prelude
[31bb2e1]	344
[4b84e35]	345	(*sqe){ IORING_OP_FADVISE, fd };
	346	sqe->off = (uint64_t)offset;
[3f850d7]	347	sqe->len = len;
[4b84e35]	348	sqe->fadvise_advice = advice;
[31bb2e1]	349
[4b84e35]	350	__submit_wait
	351	#endif
	352	}
[31bb2e1]	353
[f00b26d4]	354	int cfa_madvise(void addr, size_t length, int advice, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	355	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_MADVISE)
[4b84e35]	356	return madvise( addr, length, advice );
	357	#else
	358	__submit_prelude
[31bb2e1]	359
[4b84e35]	360	(*sqe){ IORING_OP_MADVISE, 0 };
	361	sqe->addr = (uint64_t)addr;
	362	sqe->len = length;
	363	sqe->fadvise_advice = advice;
[31bb2e1]	364
[4b84e35]	365	__submit_wait
	366	#endif
	367	}
[31bb2e1]	368
[f00b26d4]	369	int cfa_openat(int dirfd, const char pathname, int flags, mode_t mode, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	370	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_OPENAT)
[4b84e35]	371	return openat( dirfd, pathname, flags, mode );
	372	#else
	373	__submit_prelude
[31bb2e1]	374
[4b84e35]	375	(*sqe){ IORING_OP_OPENAT, dirfd };
	376	sqe->addr = (uint64_t)pathname;
	377	sqe->open_flags = flags;
[3f850d7]	378	sqe->len = mode;
[31bb2e1]	379
[4b84e35]	380	__submit_wait
	381	#endif
	382	}
[31bb2e1]	383
[f00b26d4]	384	int cfa_close(int fd, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	385	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_CLOSE)
[4b84e35]	386	return close( fd );
	387	#else
	388	__submit_prelude
[31bb2e1]	389
[4b84e35]	390	(*sqe){ IORING_OP_CLOSE, fd };
	391
	392	__submit_wait
	393	#endif
	394	}
[31bb2e1]	395
[efc171d1]	396	// Forward declare in case it is not supported
	397	struct statx;
[f00b26d4]	398	int cfa_statx(int dirfd, const char pathname, int flags, unsigned int mask, struct statx statxbuf, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	399	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_STATX)
[5db836e]	400	#if defined(__NR_statx)
	401	return syscall( __NR_statx, dirfd, pathname, flags, mask, statxbuf );
	402	#else
	403	errno = ENOTSUP;
	404	return -1;
	405	#endif
[519f11c]	406	#else
	407	__submit_prelude
	408
	409	(*sqe){ IORING_OP_STATX, dirfd, pathname, mask, (uint64_t)statxbuf };
[f00b26d4]	410	sqe->statx_flags = flags;
[519f11c]	411
	412	__submit_wait
	413	#endif
	414	}
	415
[f00b26d4]	416	ssize_t cfa_read(int fd, void buf, size_t count, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	417	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_READ)
[4b84e35]	418	return read( fd, buf, count );
	419	#else
	420	__submit_prelude
	421
	422	(*sqe){ IORING_OP_READ, fd, buf, count, 0 };
	423
	424	__submit_wait
	425	#endif
	426	}
	427
[f00b26d4]	428	ssize_t cfa_write(int fd, void buf, size_t count, int submit_flags, Duration timeout, io_cancellation cancellation, io_context * context) {
[5751a56]	429	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_WRITE)
[4b84e35]	430	return read( fd, buf, count );
	431	#else
	432	__submit_prelude
	433
	434	(*sqe){ IORING_OP_WRITE, fd, buf, count, 0 };
	435
	436	__submit_wait
	437	#endif
	438	}
	439
[f00b26d4]	440	ssize_t cfa_splice(int fd_in, loff_t off_in, int fd_out, loff_t off_out, size_t len, unsigned int flags, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	441	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_SPLICE)
	442	return splice( fd_in, off_in, fd_out, off_out, len, flags );
	443	#else
	444	__submit_prelude
	445
[3f850d7]	446	(*sqe){ IORING_OP_SPLICE, fd_out };
	447	if( off_out ) {
	448	sqe->off = *off_out;
	449	}
	450	else {
	451	sqe->off = (uint64_t)-1;
	452	}
	453	sqe->len = len;
[5751a56]	454	sqe->splice_fd_in = fd_in;
[3f850d7]	455	if( off_in ) {
	456	sqe->splice_off_in = *off_in;
	457	}
	458	else {
	459	sqe->splice_off_in = (uint64_t)-1;
	460	}
[f00b26d4]	461	sqe->splice_flags = flags \| (SPLICE_FLAGS & submit_flags);
[5751a56]	462
	463	__submit_wait
	464	#endif
	465	}
	466
[f00b26d4]	467	ssize_t cfa_tee(int fd_in, int fd_out, size_t len, unsigned int flags, int submit_flags, Duration timeout, io_cancellation * cancellation, io_context * context) {
[5751a56]	468	#if !defined(CFA_HAVE_LINUX_IO_URING_H) \|\| !defined(CFA_HAVE_IORING_OP_TEE)
[0a92c78]	469	return tee( fd_in, fd_out, len, flags );
	470	#else
	471	__submit_prelude
	472
	473	(*sqe){ IORING_OP_TEE, fd_out, 0p, len, 0 };
	474	sqe->splice_fd_in = fd_in;
[f00b26d4]	475	sqe->splice_flags = flags \| (SPLICE_FLAGS & submit_flags);
[0a92c78]	476
	477	__submit_wait
	478	#endif
	479	}
	480
[4b84e35]	481	//-----------------------------------------------------------------------------
	482	// Check if a function is asynchronous
	483
	484	// Macro magic to reduce the size of the following switch case
	485	#define IS_DEFINED_APPLY(f, ...) f(__VA_ARGS__)
	486	#define IS_DEFINED_SECOND(first, second, ...) second
	487	#define IS_DEFINED_TEST(expansion) _CFA_IO_FEATURE_##expansion
	488	#define IS_DEFINED(macro) IS_DEFINED_APPLY( IS_DEFINED_SECOND,IS_DEFINED_TEST(macro) false, true)
	489
	490	bool has_user_level_blocking( fptr_t func ) {
[5751a56]	491	#if defined(CFA_HAVE_LINUX_IO_URING_H)
[4b84e35]	492	#if defined(HAVE_PREADV2)
	493	if( /func == (fptr_t)preadv2 \|\| /
	494	func == (fptr_t)cfa_preadv2 )
[5751a56]	495	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_READV ,
	496	return IS_DEFINED(CFA_HAVE_IORING_OP_READV);
[31bb2e1]	497	#endif
	498
[4b84e35]	499	#if defined(HAVE_PWRITEV2)
	500	if( /func == (fptr_t)pwritev2 \|\| /
	501	func == (fptr_t)cfa_pwritev2 )
[5751a56]	502	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_WRITEV ,
	503	return IS_DEFINED(CFA_HAVE_IORING_OP_WRITEV);
[31bb2e1]	504	#endif
	505
[4b84e35]	506	if( /func == (fptr_t)fsync \|\| /
	507	func == (fptr_t)cfa_fsync )
[5751a56]	508	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_FSYNC ,
	509	return IS_DEFINED(CFA_HAVE_IORING_OP_FSYNC);
[4b84e35]	510
	511	if( /func == (fptr_t)ync_file_range \|\| /
	512	func == (fptr_t)cfa_sync_file_range )
[5751a56]	513	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_SYNC_FILE_RANGE ,
	514	return IS_DEFINED(CFA_HAVE_IORING_OP_SYNC_FILE_RANGE);
[4b84e35]	515
	516	if( /func == (fptr_t)sendmsg \|\| /
	517	func == (fptr_t)cfa_sendmsg )
[5751a56]	518	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_SENDMSG ,
	519	return IS_DEFINED(CFA_HAVE_IORING_OP_SENDMSG);
[4b84e35]	520
	521	if( /func == (fptr_t)recvmsg \|\| /
	522	func == (fptr_t)cfa_recvmsg )
[5751a56]	523	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_RECVMSG ,
	524	return IS_DEFINED(CFA_HAVE_IORING_OP_RECVMSG);
[4b84e35]	525
	526	if( /func == (fptr_t)send \|\| /
	527	func == (fptr_t)cfa_send )
[5751a56]	528	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_SEND ,
	529	return IS_DEFINED(CFA_HAVE_IORING_OP_SEND);
[4b84e35]	530
	531	if( /func == (fptr_t)recv \|\| /
	532	func == (fptr_t)cfa_recv )
[5751a56]	533	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_RECV ,
	534	return IS_DEFINED(CFA_HAVE_IORING_OP_RECV);
[4b84e35]	535
	536	if( /func == (fptr_t)accept4 \|\| /
	537	func == (fptr_t)cfa_accept4 )
[5751a56]	538	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_ACCEPT ,
	539	return IS_DEFINED(CFA_HAVE_IORING_OP_ACCEPT);
[4b84e35]	540
	541	if( /func == (fptr_t)connect \|\| /
	542	func == (fptr_t)cfa_connect )
[5751a56]	543	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_CONNECT ,
	544	return IS_DEFINED(CFA_HAVE_IORING_OP_CONNECT);
[4b84e35]	545
	546	if( /func == (fptr_t)fallocate \|\| /
	547	func == (fptr_t)cfa_fallocate )
[5751a56]	548	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_FALLOCATE ,
	549	return IS_DEFINED(CFA_HAVE_IORING_OP_FALLOCATE);
[4b84e35]	550
	551	if( /func == (fptr_t)posix_fadvise \|\| /
	552	func == (fptr_t)cfa_fadvise )
[5751a56]	553	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_FADVISE ,
	554	return IS_DEFINED(CFA_HAVE_IORING_OP_FADVISE);
[4b84e35]	555
	556	if( /func == (fptr_t)madvise \|\| /
	557	func == (fptr_t)cfa_madvise )
[5751a56]	558	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_MADVISE ,
	559	return IS_DEFINED(CFA_HAVE_IORING_OP_MADVISE);
[4b84e35]	560
	561	if( /func == (fptr_t)openat \|\| /
	562	func == (fptr_t)cfa_openat )
[5751a56]	563	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_OPENAT ,
	564	return IS_DEFINED(CFA_HAVE_IORING_OP_OPENAT);
[4b84e35]	565
	566	if( /func == (fptr_t)close \|\| /
	567	func == (fptr_t)cfa_close )
[5751a56]	568	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_CLOSE ,
	569	return IS_DEFINED(CFA_HAVE_IORING_OP_CLOSE);
[4b84e35]	570
	571	if( /func == (fptr_t)read \|\| /
	572	func == (fptr_t)cfa_read )
[5751a56]	573	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_READ ,
	574	return IS_DEFINED(CFA_HAVE_IORING_OP_READ);
[4b84e35]	575
	576	if( /func == (fptr_t)write \|\| /
	577	func == (fptr_t)cfa_write )
[5751a56]	578	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_WRITE ,
	579	return IS_DEFINED(CFA_HAVE_IORING_OP_WRITE);
[0a92c78]	580
	581	if( /func == (fptr_t)splice \|\| /
[f00b26d4]	582	func == (fptr_t)cfa_splice )
[5751a56]	583	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_SPLICE ,
	584	return IS_DEFINED(CFA_HAVE_IORING_OP_SPLICE);
[0a92c78]	585
	586	if( /func == (fptr_t)tee \|\| /
	587	func == (fptr_t)cfa_tee )
[5751a56]	588	#define _CFA_IO_FEATURE_CFA_HAVE_IORING_OP_TEE ,
	589	return IS_DEFINED(CFA_HAVE_IORING_OP_TEE);
[4b84e35]	590	#endif
	591
	592	return false;
[85eafc5]	593	}

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