FM / linux

/usr/include/linux

Name	Size	Mode	Actions
android/	-	0755	rm
byteorder/	-	0755	rm
caif/	-	0755	rm
can/	-	0755	rm
cifs/	-	0755	rm
dvb/	-	0755	rm
genwqe/	-	0755	rm
hdlc/	-	0755	rm
hsi/	-	0755	rm
iio/	-	0755	rm
isdn/	-	0755	rm
misc/	-	0755	rm
mmc/	-	0755	rm
netfilter/	-	0755	rm
netfilter_arp/	-	0755	rm
netfilter_bridge/	-	0755	rm
netfilter_ipv4/	-	0755	rm
netfilter_ipv6/	-	0755	rm
nfsd/	-	0755	rm
raid/	-	0755	rm
sched/	-	0755	rm
spi/	-	0755	rm
sunrpc/	-	0755	rm
surface_aggregator/	-	0755	rm
tc_act/	-	0755	rm
tc_ematch/	-	0755	rm
usb/	-	0755	rm
a.out.h	6892	0644	edit dl rm
acct.h	3913	0644	edit dl rm
acrn.h	16686	0644	edit dl rm
adb.h	1140	0644	edit dl rm
adfs_fs.h	993	0644	edit dl rm
affs_hardblocks.h	1578	0644	edit dl rm
agpgart.h	3940	0644	edit dl rm
aio_abi.h	3398	0644	edit dl rm
am437x-vpfe.h	3681	0644	edit dl rm
apm_bios.h	3683	0644	edit dl rm
arcfb.h	213	0644	edit dl rm
arm_sdei.h	2751	0644	edit dl rm
aspeed-lpc-ctrl.h	1780	0644	edit dl rm
aspeed-p2a-ctrl.h	1906	0644	edit dl rm
atalk.h	1023	0644	edit dl rm
atm.h	7888	0644	edit dl rm
atmapi.h	952	0644	edit dl rm
atmarp.h	1296	0644	edit dl rm
atmbr2684.h	3271	0644	edit dl rm
atmclip.h	576	0644	edit dl rm
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atmlec.h	2381	0644	edit dl rm
atmmpc.h	4226	0644	edit dl rm
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atmsvc.h	1853	0644	edit dl rm
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atm_he.h	406	0644	edit dl rm
atm_idt77105.h	955	0644	edit dl rm
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atm_tcp.h	1622	0644	edit dl rm
atm_zatm.h	1540	0644	edit dl rm
audit.h	21570	0644	edit dl rm
auto_dev-ioctl.h	4986	0644	edit dl rm
auto_fs.h	6428	0644	edit dl rm
auto_fs4.h	451	0644	edit dl rm
auxvec.h	1597	0644	edit dl rm
ax25.h	2824	0644	edit dl rm
batadv_packet.h	20345	0644	edit dl rm
batman_adv.h	16887	0644	edit dl rm
baycom.h	883	0644	edit dl rm
bcm933xx_hcs.h	419	0644	edit dl rm
bfs_fs.h	1905	0644	edit dl rm
binfmts.h	776	0644	edit dl rm
bits.h	447	0644	edit dl rm
blkpg.h	904	0644	edit dl rm
blktrace_api.h	4701	0644	edit dl rm
blkzoned.h	6493	0644	edit dl rm
bpf.h	278639	0644	edit dl rm
bpfilter.h	465	0644	edit dl rm
bpf_common.h	1367	0644	edit dl rm
bpf_perf_event.h	529	0644	edit dl rm
bpqether.h	981	0644	edit dl rm
bsg.h	2494	0644	edit dl rm
bt-bmc.h	572	0644	edit dl rm
btf.h	5591	0644	edit dl rm
btrfs.h	30570	0644	edit dl rm
btrfs_tree.h	25829	0644	edit dl rm
cachefiles.h	1650	0644	edit dl rm
can.h	11496	0644	edit dl rm
capability.h	13491	0644	edit dl rm
capi.h	3124	0644	edit dl rm
cciss_defs.h	3281	0644	edit dl rm
cciss_ioctl.h	2761	0644	edit dl rm
ccs.h	767	0644	edit dl rm
cdrom.h	29561	0644	edit dl rm
cec-funcs.h	54419	0644	edit dl rm
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cfm_bridge.h	1456	0644	edit dl rm
cgroupstats.h	2219	0644	edit dl rm
chio.h	5282	0644	edit dl rm
close_range.h	377	0644	edit dl rm
cm4000_cs.h	1806	0644	edit dl rm
cn_proc.h	4149	0644	edit dl rm
coda.h	18216	0644	edit dl rm
coff.h	12549	0644	edit dl rm
connector.h	2253	0644	edit dl rm
const.h	987	0644	edit dl rm
coresight-stm.h	747	0644	edit dl rm
cramfs_fs.h	3555	0644	edit dl rm
cryptouser.h	5321	0644	edit dl rm
cuda.h	905	0644	edit dl rm
cxl_mem.h	7915	0644	edit dl rm
cycx_cfm.h	2990	0644	edit dl rm
dcbnl.h	25292	0644	edit dl rm
dccp.h	6436	0644	edit dl rm
devlink.h	23316	0644	edit dl rm
dlm.h	2553	0644	edit dl rm
dlmconstants.h	5080	0644	edit dl rm
dlm_device.h	2543	0644	edit dl rm
dlm_netlink.h	1159	0644	edit dl rm
dlm_plock.h	894	0644	edit dl rm
dm-ioctl.h	11753	0644	edit dl rm
dm-log-userspace.h	15191	0644	edit dl rm
dma-buf.h	5247	0644	edit dl rm
dma-heap.h	1394	0644	edit dl rm
dn.h	4642	0644	edit dl rm
dns_resolver.h	3949	0644	edit dl rm
dpll.h	8697	0644	edit dl rm
dqblk_xfs.h	9388	0644	edit dl rm
edd.h	5604	0644	edit dl rm
efs_fs_sb.h	2227	0644	edit dl rm
elf-em.h	2627	0644	edit dl rm
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elf.h	15042	0644	edit dl rm
errno.h	23	0644	edit dl rm
errqueue.h	1983	0644	edit dl rm
erspan.h	1059	0644	edit dl rm
ethtool.h	103855	0644	edit dl rm
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eventfd.h	264	0644	edit dl rm
eventpoll.h	2913	0644	edit dl rm
f2fs.h	3301	0644	edit dl rm
fadvise.h	842	0644	edit dl rm
falloc.h	3643	0644	edit dl rm
fanotify.h	7886	0644	edit dl rm
fb.h	16477	0644	edit dl rm
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fd.h	12117	0644	edit dl rm
fdreg.h	5364	0644	edit dl rm
fib_rules.h	2036	0644	edit dl rm
fiemap.h	2775	0644	edit dl rm
filter.h	2216	0644	edit dl rm
firewire-cdev.h	44240	0644	edit dl rm
firewire-constants.h	3231	0644	edit dl rm
fou.h	819	0644	edit dl rm
fpga-dfl.h	8728	0644	edit dl rm
fs.h	13186	0644	edit dl rm
fscrypt.h	6565	0644	edit dl rm
fsi.h	2255	0644	edit dl rm
fsl_hypervisor.h	7301	0644	edit dl rm
fsl_mc.h	734	0644	edit dl rm
fsmap.h	4393	0644	edit dl rm
fsverity.h	3185	0644	edit dl rm
fuse.h	25968	0644	edit dl rm
futex.h	6127	0644	edit dl rm
gameport.h	897	0644	edit dl rm
genetlink.h	2238	0644	edit dl rm
gen_stats.h	1526	0644	edit dl rm
gfs2_ondisk.h	14773	0644	edit dl rm
gpio.h	19922	0644	edit dl rm
gsmmux.h	4509	0644	edit dl rm
gtp.h	734	0644	edit dl rm
handshake.h	1646	0644	edit dl rm
hash_info.h	971	0644	edit dl rm
hdlc.h	637	0644	edit dl rm
hdlcdrv.h	2908	0644	edit dl rm
hdreg.h	22703	0644	edit dl rm
hid.h	2086	0644	edit dl rm
hiddev.h	6345	0644	edit dl rm
hidraw.h	1993	0644	edit dl rm
hpet.h	743	0644	edit dl rm
hsr_netlink.h	1101	0644	edit dl rm
hw_breakpoint.h	742	0644	edit dl rm
hyperv.h	11152	0644	edit dl rm
i2c-dev.h	1875	0644	edit dl rm
i2c.h	6890	0644	edit dl rm
i2o-dev.h	11555	0644	edit dl rm
i8k.h	1528	0644	edit dl rm
icmp.h	4785	0644	edit dl rm
icmpv6.h	4300	0644	edit dl rm
idxd.h	9328	0644	edit dl rm
if.h	10925	0644	edit dl rm
ife.h	351	0644	edit dl rm
if_addr.h	1886	0644	edit dl rm
if_addrlabel.h	721	0644	edit dl rm
if_alg.h	1566	0644	edit dl rm
if_arcnet.h	3717	0644	edit dl rm
if_arp.h	6565	0644	edit dl rm
if_bonding.h	5145	0644	edit dl rm
if_bridge.h	20755	0644	edit dl rm
if_cablemodem.h	986	0644	edit dl rm
if_eql.h	1349	0644	edit dl rm
if_ether.h	8410	0644	edit dl rm
if_fc.h	1738	0644	edit dl rm
if_fddi.h	4369	0644	edit dl rm
if_hippi.h	4235	0644	edit dl rm
if_infiniband.h	1245	0644	edit dl rm
if_link.h	54131	0644	edit dl rm
if_ltalk.h	210	0644	edit dl rm
if_macsec.h	6503	0644	edit dl rm
if_packet.h	8183	0644	edit dl rm
if_phonet.h	424	0644	edit dl rm
if_plip.h	660	0644	edit dl rm
if_ppp.h	29	0644	edit dl rm
if_pppol2tp.h	3303	0644	edit dl rm
if_pppox.h	4879	0644	edit dl rm
if_slip.h	872	0644	edit dl rm
if_team.h	2600	0644	edit dl rm
if_tun.h	4098	0644	edit dl rm
if_tunnel.h	5488	0644	edit dl rm
if_vlan.h	1831	0644	edit dl rm
if_x25.h	881	0644	edit dl rm
if_xdp.h	5414	0644	edit dl rm
igmp.h	3064	0644	edit dl rm
ila.h	1246	0644	edit dl rm
in.h	10486	0644	edit dl rm
in6.h	7537	0644	edit dl rm
inet_diag.h	5017	0644	edit dl rm
inotify.h	3292	0644	edit dl rm
input-event-codes.h	30203	0644	edit dl rm
input.h	16217	0644	edit dl rm
in_route.h	936	0644	edit dl rm
ioctl.h	163	0644	edit dl rm
iommufd.h	37327	0644	edit dl rm
ioprio.h	4175	0644	edit dl rm
io_uring.h	20887	0644	edit dl rm
ip.h	4813	0644	edit dl rm
ip6_tunnel.h	1953	0644	edit dl rm
ipc.h	2101	0644	edit dl rm
ipmi.h	15442	0644	edit dl rm
ipmi_bmc.h	488	0644	edit dl rm
ipmi_msgdefs.h	3430	0644	edit dl rm
ipmi_ssif_bmc.h	441	0644	edit dl rm
ipsec.h	947	0644	edit dl rm
ipv6.h	4169	0644	edit dl rm
ipv6_route.h	1908	0644	edit dl rm
ipx.h	2347	0644	edit dl rm
ip_vs.h	14135	0644	edit dl rm
irqnr.h	104	0644	edit dl rm
iso_fs.h	6485	0644	edit dl rm
isst_if.h	15281	0644	edit dl rm
ivtv.h	3022	0644	edit dl rm
ivtvfb.h	1207	0644	edit dl rm
jffs2.h	6815	0644	edit dl rm
joystick.h	3434	0644	edit dl rm
kcm.h	822	0644	edit dl rm
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kcov.h	1963	0644	edit dl rm
kd.h	6452	0644	edit dl rm
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kernel.h	194	0644	edit dl rm
kernelcapi.h	1019	0644	edit dl rm
kexec.h	2097	0644	edit dl rm
keyboard.h	13459	0644	edit dl rm
keyctl.h	5996	0644	edit dl rm
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kvm.h	48372	0644	edit dl rm
kvm_para.h	1001	0644	edit dl rm
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lp.h	4190	0644	edit dl rm
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mptcp.h	3763	0644	edit dl rm
mptcp_pm.h	4407	0644	edit dl rm
mqueue.h	2201	0644	edit dl rm
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mrp_bridge.h	1708	0644	edit dl rm
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msg.h	3386	0644	edit dl rm
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mtio.h	8175	0644	edit dl rm
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net.h	2085	0644	edit dl rm
netconf.h	614	0644	edit dl rm
netdev.h	5786	0644	edit dl rm
netdevice.h	2253	0644	edit dl rm
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netfilter_arp.h	445	0644	edit dl rm
netfilter_bridge.h	1168	0644	edit dl rm
netfilter_decnet.h	1758	0644	edit dl rm
netfilter_ipv4.h	1488	0644	edit dl rm
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nfs_fs.h	1654	0644	edit dl rm
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nvram.h	532	0644	edit dl rm
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omapfb.h	5918	0644	edit dl rm
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packet_diag.h	1672	0644	edit dl rm
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pci.h	1380	0644	edit dl rm
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pci_regs.h	63374	0644	edit dl rm
perf_event.h	43709	0644	edit dl rm
personality.h	2097	0644	edit dl rm
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string.h	238	0644	edit dl rm
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sysinfo.h	1049	0644	edit dl rm
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taskstats.h	8322	0644	edit dl rm
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Edit: /usr/include/linux/io_uring.h (20887B)

/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
/*
 * Header file for the io_uring interface.
 *
 * Copyright (C) 2019 Jens Axboe
 * Copyright (C) 2019 Christoph Hellwig
 */
#ifndef LINUX_IO_URING_H
#define LINUX_IO_URING_H

#include <linux/fs.h>
#include <linux/types.h>
/*
 * this file is shared with liburing and that has to autodetect
 * if linux/time_types.h is available or not, it can
 * define UAPI_LINUX_IO_URING_H_SKIP_LINUX_TIME_TYPES_H
 * if linux/time_types.h is not available
 */
#ifndef UAPI_LINUX_IO_URING_H_SKIP_LINUX_TIME_TYPES_H
#include <linux/time_types.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * IO submission data structure (Submission Queue Entry)
 */
struct io_uring_sqe {
	__u8	opcode;		/* type of operation for this sqe */
	__u8	flags;		/* IOSQE_ flags */
	__u16	ioprio;		/* ioprio for the request */
	__s32	fd;		/* file descriptor to do IO on */
	union {
		__u64	off;	/* offset into file */
		__u64	addr2;
		struct {
			__u32	cmd_op;
			__u32	__pad1;
		};
	};
	union {
		__u64	addr;	/* pointer to buffer or iovecs */
		__u64	splice_off_in;
		struct {
			__u32	level;
			__u32	optname;
		};
	};
	__u32	len;		/* buffer size or number of iovecs */
	union {
		__kernel_rwf_t	rw_flags;
		__u32		fsync_flags;
		__u16		poll_events;	/* compatibility */
		__u32		poll32_events;	/* word-reversed for BE */
		__u32		sync_range_flags;
		__u32		msg_flags;
		__u32		timeout_flags;
		__u32		accept_flags;
		__u32		cancel_flags;
		__u32		open_flags;
		__u32		statx_flags;
		__u32		fadvise_advice;
		__u32		splice_flags;
		__u32		rename_flags;
		__u32		unlink_flags;
		__u32		hardlink_flags;
		__u32		xattr_flags;
		__u32		msg_ring_flags;
		__u32		uring_cmd_flags;
		__u32		waitid_flags;
		__u32		futex_flags;
		__u32		install_fd_flags;
		__u32		nop_flags;
	};
	__u64	user_data;	/* data to be passed back at completion time */
	/* pack this to avoid bogus arm OABI complaints */
	union {
		/* index into fixed buffers, if used */
		__u16	buf_index;
		/* for grouped buffer selection */
		__u16	buf_group;
	} __attribute__((packed));
	/* personality to use, if used */
	__u16	personality;
	union {
		__s32	splice_fd_in;
		__u32	file_index;
		__u32	optlen;
		struct {
			__u16	addr_len;
			__u16	__pad3[1];
		};
	};
	union {
		struct {
			__u64	addr3;
			__u64	__pad2[1];
		};
		__u64	optval;
		/*
		 * If the ring is initialized with IORING_SETUP_SQE128, then
		 * this field is used for 80 bytes of arbitrary command data
		 */
		__u8	cmd[0];
	};
};

/*
 * If sqe->file_index is set to this for opcodes that instantiate a new
 * direct descriptor (like openat/openat2/accept), then io_uring will allocate
 * an available direct descriptor instead of having the application pass one
 * in. The picked direct descriptor will be returned in cqe->res, or -ENFILE
 * if the space is full.
 */
#define IORING_FILE_INDEX_ALLOC		(~0U)

enum io_uring_sqe_flags_bit {
	IOSQE_FIXED_FILE_BIT,
	IOSQE_IO_DRAIN_BIT,
	IOSQE_IO_LINK_BIT,
	IOSQE_IO_HARDLINK_BIT,
	IOSQE_ASYNC_BIT,
	IOSQE_BUFFER_SELECT_BIT,
	IOSQE_CQE_SKIP_SUCCESS_BIT,
};

/*
 * sqe->flags
 */
/* use fixed fileset */
#define IOSQE_FIXED_FILE	(1U << IOSQE_FIXED_FILE_BIT)
/* issue after inflight IO */
#define IOSQE_IO_DRAIN		(1U << IOSQE_IO_DRAIN_BIT)
/* links next sqe */
#define IOSQE_IO_LINK		(1U << IOSQE_IO_LINK_BIT)
/* like LINK, but stronger */
#define IOSQE_IO_HARDLINK	(1U << IOSQE_IO_HARDLINK_BIT)
/* always go async */
#define IOSQE_ASYNC		(1U << IOSQE_ASYNC_BIT)
/* select buffer from sqe->buf_group */
#define IOSQE_BUFFER_SELECT	(1U << IOSQE_BUFFER_SELECT_BIT)
/* don't post CQE if request succeeded */
#define IOSQE_CQE_SKIP_SUCCESS	(1U << IOSQE_CQE_SKIP_SUCCESS_BIT)

/*
 * io_uring_setup() flags
 */
#define IORING_SETUP_IOPOLL	(1U << 0)	/* io_context is polled */
#define IORING_SETUP_SQPOLL	(1U << 1)	/* SQ poll thread */
#define IORING_SETUP_SQ_AFF	(1U << 2)	/* sq_thread_cpu is valid */
#define IORING_SETUP_CQSIZE	(1U << 3)	/* app defines CQ size */
#define IORING_SETUP_CLAMP	(1U << 4)	/* clamp SQ/CQ ring sizes */
#define IORING_SETUP_ATTACH_WQ	(1U << 5)	/* attach to existing wq */
#define IORING_SETUP_R_DISABLED	(1U << 6)	/* start with ring disabled */
#define IORING_SETUP_SUBMIT_ALL	(1U << 7)	/* continue submit on error */
/*
 * Cooperative task running. When requests complete, they often require
 * forcing the submitter to transition to the kernel to complete. If this
 * flag is set, work will be done when the task transitions anyway, rather
 * than force an inter-processor interrupt reschedule. This avoids interrupting
 * a task running in userspace, and saves an IPI.
 */
#define IORING_SETUP_COOP_TASKRUN	(1U << 8)
/*
 * If COOP_TASKRUN is set, get notified if task work is available for
 * running and a kernel transition would be needed to run it. This sets
 * IORING_SQ_TASKRUN in the sq ring flags. Not valid with COOP_TASKRUN.
 */
#define IORING_SETUP_TASKRUN_FLAG	(1U << 9)
#define IORING_SETUP_SQE128		(1U << 10) /* SQEs are 128 byte */
#define IORING_SETUP_CQE32		(1U << 11) /* CQEs are 32 byte */
/*
 * Only one task is allowed to submit requests
 */
#define IORING_SETUP_SINGLE_ISSUER	(1U << 12)

/*
 * Defer running task work to get events.
 * Rather than running bits of task work whenever the task transitions
 * try to do it just before it is needed.
 */
#define IORING_SETUP_DEFER_TASKRUN	(1U << 13)

/*
 * Application provides the memory for the rings
 */
#define IORING_SETUP_NO_MMAP		(1U << 14)

/*
 * Register the ring fd in itself for use with
 * IORING_REGISTER_USE_REGISTERED_RING; return a registered fd index rather
 * than an fd.
 */
#define IORING_SETUP_REGISTERED_FD_ONLY	(1U << 15)

/*
 * Removes indirection through the SQ index array.
 */
#define IORING_SETUP_NO_SQARRAY		(1U << 16)

enum io_uring_op {
	IORING_OP_NOP,
	IORING_OP_READV,
	IORING_OP_WRITEV,
	IORING_OP_FSYNC,
	IORING_OP_READ_FIXED,
	IORING_OP_WRITE_FIXED,
	IORING_OP_POLL_ADD,
	IORING_OP_POLL_REMOVE,
	IORING_OP_SYNC_FILE_RANGE,
	IORING_OP_SENDMSG,
	IORING_OP_RECVMSG,
	IORING_OP_TIMEOUT,
	IORING_OP_TIMEOUT_REMOVE,
	IORING_OP_ACCEPT,
	IORING_OP_ASYNC_CANCEL,
	IORING_OP_LINK_TIMEOUT,
	IORING_OP_CONNECT,
	IORING_OP_FALLOCATE,
	IORING_OP_OPENAT,
	IORING_OP_CLOSE,
	IORING_OP_FILES_UPDATE,
	IORING_OP_STATX,
	IORING_OP_READ,
	IORING_OP_WRITE,
	IORING_OP_FADVISE,
	IORING_OP_MADVISE,
	IORING_OP_SEND,
	IORING_OP_RECV,
	IORING_OP_OPENAT2,
	IORING_OP_EPOLL_CTL,
	IORING_OP_SPLICE,
	IORING_OP_PROVIDE_BUFFERS,
	IORING_OP_REMOVE_BUFFERS,
	IORING_OP_TEE,
	IORING_OP_SHUTDOWN,
	IORING_OP_RENAMEAT,
	IORING_OP_UNLINKAT,
	IORING_OP_MKDIRAT,
	IORING_OP_SYMLINKAT,
	IORING_OP_LINKAT,
	IORING_OP_MSG_RING,
	IORING_OP_FSETXATTR,
	IORING_OP_SETXATTR,
	IORING_OP_FGETXATTR,
	IORING_OP_GETXATTR,
	IORING_OP_SOCKET,
	IORING_OP_URING_CMD,
	IORING_OP_SEND_ZC,
	IORING_OP_SENDMSG_ZC,
	IORING_OP_READ_MULTISHOT,
	IORING_OP_WAITID,
	IORING_OP_FUTEX_WAIT,
	IORING_OP_FUTEX_WAKE,
	IORING_OP_FUTEX_WAITV,
	IORING_OP_FIXED_FD_INSTALL,
	IORING_OP_FTRUNCATE,

/* this goes last, obviously */
	IORING_OP_LAST,
};

/*
 * sqe->uring_cmd_flags		top 8bits aren't available for userspace
 * IORING_URING_CMD_FIXED	use registered buffer; pass this flag
 *				along with setting sqe->buf_index.
 */
#define IORING_URING_CMD_FIXED	(1U << 0)
#define IORING_URING_CMD_MASK	IORING_URING_CMD_FIXED

/*
 * sqe->fsync_flags
 */
#define IORING_FSYNC_DATASYNC	(1U << 0)

/*
 * sqe->timeout_flags
 */
#define IORING_TIMEOUT_ABS		(1U << 0)
#define IORING_TIMEOUT_UPDATE		(1U << 1)
#define IORING_TIMEOUT_BOOTTIME		(1U << 2)
#define IORING_TIMEOUT_REALTIME		(1U << 3)
#define IORING_LINK_TIMEOUT_UPDATE	(1U << 4)
#define IORING_TIMEOUT_ETIME_SUCCESS	(1U << 5)
#define IORING_TIMEOUT_MULTISHOT	(1U << 6)
#define IORING_TIMEOUT_CLOCK_MASK	(IORING_TIMEOUT_BOOTTIME | IORING_TIMEOUT_REALTIME)
#define IORING_TIMEOUT_UPDATE_MASK	(IORING_TIMEOUT_UPDATE | IORING_LINK_TIMEOUT_UPDATE)
/*
 * sqe->splice_flags
 * extends splice(2) flags
 */
#define SPLICE_F_FD_IN_FIXED	(1U << 31) /* the last bit of __u32 */

/*
 * POLL_ADD flags. Note that since sqe->poll_events is the flag space, the
 * command flags for POLL_ADD are stored in sqe->len.
 *
 * IORING_POLL_ADD_MULTI	Multishot poll. Sets IORING_CQE_F_MORE if
 *				the poll handler will continue to report
 *				CQEs on behalf of the same SQE.
 *
 * IORING_POLL_UPDATE		Update existing poll request, matching
 *				sqe->addr as the old user_data field.
 *
 * IORING_POLL_LEVEL		Level triggered poll.
 */
#define IORING_POLL_ADD_MULTI	(1U << 0)
#define IORING_POLL_UPDATE_EVENTS	(1U << 1)
#define IORING_POLL_UPDATE_USER_DATA	(1U << 2)
#define IORING_POLL_ADD_LEVEL		(1U << 3)

/*
 * ASYNC_CANCEL flags.
 *
 * IORING_ASYNC_CANCEL_ALL	Cancel all requests that match the given key
 * IORING_ASYNC_CANCEL_FD	Key off 'fd' for cancelation rather than the
 *				request 'user_data'
 * IORING_ASYNC_CANCEL_ANY	Match any request
 * IORING_ASYNC_CANCEL_FD_FIXED	'fd' passed in is a fixed descriptor
 * IORING_ASYNC_CANCEL_USERDATA	Match on user_data, default for no other key
 * IORING_ASYNC_CANCEL_OP	Match request based on opcode
 */
#define IORING_ASYNC_CANCEL_ALL	(1U << 0)
#define IORING_ASYNC_CANCEL_FD	(1U << 1)
#define IORING_ASYNC_CANCEL_ANY	(1U << 2)
#define IORING_ASYNC_CANCEL_FD_FIXED	(1U << 3)
#define IORING_ASYNC_CANCEL_USERDATA	(1U << 4)
#define IORING_ASYNC_CANCEL_OP	(1U << 5)

/*
 * send/sendmsg and recv/recvmsg flags (sqe->ioprio)
 *
 * IORING_RECVSEND_POLL_FIRST	If set, instead of first attempting to send
 *				or receive and arm poll if that yields an
 *				-EAGAIN result, arm poll upfront and skip
 *				the initial transfer attempt.
 *
 * IORING_RECV_MULTISHOT	Multishot recv. Sets IORING_CQE_F_MORE if
 *				the handler will continue to report
 *				CQEs on behalf of the same SQE.
 *
 * IORING_RECVSEND_FIXED_BUF	Use registered buffers, the index is stored in
 *				the buf_index field.
 *
 * IORING_SEND_ZC_REPORT_USAGE
 *				If set, SEND[MSG]_ZC should report
 *				the zerocopy usage in cqe.res
 *				for the IORING_CQE_F_NOTIF cqe.
 *				0 is reported if zerocopy was actually possible.
 *				IORING_NOTIF_USAGE_ZC_COPIED if data was copied
 *				(at least partially).
 *
 * IORING_RECVSEND_BUNDLE	Used with IOSQE_BUFFER_SELECT. If set, send or
 *				recv will grab as many buffers from the buffer
 *				group ID given and send them all. The completion
 *				result 	will be the number of buffers send, with
 *				the starting buffer ID in cqe->flags as per
 *				usual for provided buffer usage. The buffers
 *				will be	contigious from the starting buffer ID.
 */
#define IORING_RECVSEND_POLL_FIRST	(1U << 0)
#define IORING_RECV_MULTISHOT		(1U << 1)
#define IORING_RECVSEND_FIXED_BUF	(1U << 2)
#define IORING_SEND_ZC_REPORT_USAGE	(1U << 3)
#define IORING_RECVSEND_BUNDLE		(1U << 4)

/*
 * cqe.res for IORING_CQE_F_NOTIF if
 * IORING_SEND_ZC_REPORT_USAGE was requested
 *
 * It should be treated as a flag, all other
 * bits of cqe.res should be treated as reserved!
 */
#define IORING_NOTIF_USAGE_ZC_COPIED    (1U << 31)

/*
 * accept flags stored in sqe->ioprio
 */
#define IORING_ACCEPT_MULTISHOT	(1U << 0)
#define IORING_ACCEPT_DONTWAIT	(1U << 1)
#define IORING_ACCEPT_POLL_FIRST	(1U << 2)

/*
 * IORING_OP_MSG_RING command types, stored in sqe->addr
 */
enum io_uring_msg_ring_flags {
	IORING_MSG_DATA,	/* pass sqe->len as 'res' and off as user_data */
	IORING_MSG_SEND_FD,	/* send a registered fd to another ring */
};

/*
 * IORING_OP_MSG_RING flags (sqe->msg_ring_flags)
 *
 * IORING_MSG_RING_CQE_SKIP	Don't post a CQE to the target ring. Not
 *				applicable for IORING_MSG_DATA, obviously.
 */
#define IORING_MSG_RING_CQE_SKIP	(1U << 0)
/* Pass through the flags from sqe->file_index to cqe->flags */
#define IORING_MSG_RING_FLAGS_PASS	(1U << 1)

/*
 * IORING_OP_FIXED_FD_INSTALL flags (sqe->install_fd_flags)
 *
 * IORING_FIXED_FD_NO_CLOEXEC	Don't mark the fd as O_CLOEXEC
 */
#define IORING_FIXED_FD_NO_CLOEXEC	(1U << 0)

/*
 * IORING_OP_NOP flags (sqe->nop_flags)
 *
 * IORING_NOP_INJECT_RESULT	Inject result from sqe->result
 */
#define IORING_NOP_INJECT_RESULT	(1U << 0)

/*
 * IO completion data structure (Completion Queue Entry)
 */
struct io_uring_cqe {
	__u64	user_data;	/* sqe->data submission passed back */
	__s32	res;		/* result code for this event */
	__u32	flags;

/*
	 * If the ring is initialized with IORING_SETUP_CQE32, then this field
	 * contains 16-bytes of padding, doubling the size of the CQE.
	 */
	__u64 big_cqe[];
};

/*
 * cqe->flags
 *
 * IORING_CQE_F_BUFFER	If set, the upper 16 bits are the buffer ID
 * IORING_CQE_F_MORE	If set, parent SQE will generate more CQE entries
 * IORING_CQE_F_SOCK_NONEMPTY	If set, more data to read after socket recv
 * IORING_CQE_F_NOTIF	Set for notification CQEs. Can be used to distinct
 * 			them from sends.
 */
#define IORING_CQE_F_BUFFER		(1U << 0)
#define IORING_CQE_F_MORE		(1U << 1)
#define IORING_CQE_F_SOCK_NONEMPTY	(1U << 2)
#define IORING_CQE_F_NOTIF		(1U << 3)

#define IORING_CQE_BUFFER_SHIFT		16

/*
 * Magic offsets for the application to mmap the data it needs
 */
#define IORING_OFF_SQ_RING		0ULL
#define IORING_OFF_CQ_RING		0x8000000ULL
#define IORING_OFF_SQES			0x10000000ULL
#define IORING_OFF_PBUF_RING		0x80000000ULL
#define IORING_OFF_PBUF_SHIFT		16
#define IORING_OFF_MMAP_MASK		0xf8000000ULL

/*
 * Filled with the offset for mmap(2)
 */
struct io_sqring_offsets {
	__u32 head;
	__u32 tail;
	__u32 ring_mask;
	__u32 ring_entries;
	__u32 flags;
	__u32 dropped;
	__u32 array;
	__u32 resv1;
	__u64 user_addr;
};

/*
 * sq_ring->flags
 */
#define IORING_SQ_NEED_WAKEUP	(1U << 0) /* needs io_uring_enter wakeup */
#define IORING_SQ_CQ_OVERFLOW	(1U << 1) /* CQ ring is overflown */
#define IORING_SQ_TASKRUN	(1U << 2) /* task should enter the kernel */

struct io_cqring_offsets {
	__u32 head;
	__u32 tail;
	__u32 ring_mask;
	__u32 ring_entries;
	__u32 overflow;
	__u32 cqes;
	__u32 flags;
	__u32 resv1;
	__u64 user_addr;
};

/*
 * cq_ring->flags
 */

/* disable eventfd notifications */
#define IORING_CQ_EVENTFD_DISABLED	(1U << 0)

/*
 * io_uring_enter(2) flags
 */
#define IORING_ENTER_GETEVENTS		(1U << 0)
#define IORING_ENTER_SQ_WAKEUP		(1U << 1)
#define IORING_ENTER_SQ_WAIT		(1U << 2)
#define IORING_ENTER_EXT_ARG		(1U << 3)
#define IORING_ENTER_REGISTERED_RING	(1U << 4)

/*
 * Passed in for io_uring_setup(2). Copied back with updated info on success
 */
struct io_uring_params {
	__u32 sq_entries;
	__u32 cq_entries;
	__u32 flags;
	__u32 sq_thread_cpu;
	__u32 sq_thread_idle;
	__u32 features;
	__u32 wq_fd;
	__u32 resv[3];
	struct io_sqring_offsets sq_off;
	struct io_cqring_offsets cq_off;
};

/*
 * io_uring_params->features flags
 */
#define IORING_FEAT_SINGLE_MMAP		(1U << 0)
#define IORING_FEAT_NODROP		(1U << 1)
#define IORING_FEAT_SUBMIT_STABLE	(1U << 2)
#define IORING_FEAT_RW_CUR_POS		(1U << 3)
#define IORING_FEAT_CUR_PERSONALITY	(1U << 4)
#define IORING_FEAT_FAST_POLL		(1U << 5)
#define IORING_FEAT_POLL_32BITS 	(1U << 6)
#define IORING_FEAT_SQPOLL_NONFIXED	(1U << 7)
#define IORING_FEAT_EXT_ARG		(1U << 8)
#define IORING_FEAT_NATIVE_WORKERS	(1U << 9)
#define IORING_FEAT_RSRC_TAGS		(1U << 10)
#define IORING_FEAT_CQE_SKIP		(1U << 11)
#define IORING_FEAT_LINKED_FILE		(1U << 12)
#define IORING_FEAT_REG_REG_RING	(1U << 13)
#define IORING_FEAT_RECVSEND_BUNDLE	(1U << 14)

/*
 * io_uring_register(2) opcodes and arguments
 */
enum io_uring_register_op {
	IORING_REGISTER_BUFFERS			= 0,
	IORING_UNREGISTER_BUFFERS		= 1,
	IORING_REGISTER_FILES			= 2,
	IORING_UNREGISTER_FILES			= 3,
	IORING_REGISTER_EVENTFD			= 4,
	IORING_UNREGISTER_EVENTFD		= 5,
	IORING_REGISTER_FILES_UPDATE		= 6,
	IORING_REGISTER_EVENTFD_ASYNC		= 7,
	IORING_REGISTER_PROBE			= 8,
	IORING_REGISTER_PERSONALITY		= 9,
	IORING_UNREGISTER_PERSONALITY		= 10,
	IORING_REGISTER_RESTRICTIONS		= 11,
	IORING_REGISTER_ENABLE_RINGS		= 12,

/* extended with tagging */
	IORING_REGISTER_FILES2			= 13,
	IORING_REGISTER_FILES_UPDATE2		= 14,
	IORING_REGISTER_BUFFERS2		= 15,
	IORING_REGISTER_BUFFERS_UPDATE		= 16,

/* set/clear io-wq thread affinities */
	IORING_REGISTER_IOWQ_AFF		= 17,
	IORING_UNREGISTER_IOWQ_AFF		= 18,

/* set/get max number of io-wq workers */
	IORING_REGISTER_IOWQ_MAX_WORKERS	= 19,

/* register/unregister io_uring fd with the ring */
	IORING_REGISTER_RING_FDS		= 20,
	IORING_UNREGISTER_RING_FDS		= 21,

/* register ring based provide buffer group */
	IORING_REGISTER_PBUF_RING		= 22,
	IORING_UNREGISTER_PBUF_RING		= 23,

/* sync cancelation API */
	IORING_REGISTER_SYNC_CANCEL		= 24,

/* register a range of fixed file slots for automatic slot allocation */
	IORING_REGISTER_FILE_ALLOC_RANGE	= 25,

/* return status information for a buffer group */
	IORING_REGISTER_PBUF_STATUS		= 26,

/* set/clear busy poll settings */
	IORING_REGISTER_NAPI			= 27,
	IORING_UNREGISTER_NAPI			= 28,

/* this goes last */
	IORING_REGISTER_LAST,

/* flag added to the opcode to use a registered ring fd */
	IORING_REGISTER_USE_REGISTERED_RING	= 1U << 31
};

/* io-wq worker categories */
enum io_wq_type {
	IO_WQ_BOUND,
	IO_WQ_UNBOUND,
};

/* deprecated, see struct io_uring_rsrc_update */
struct io_uring_files_update {
	__u32 offset;
	__u32 resv;
	__aligned_u64 /* __s32 * */ fds;
};

/*
 * Register a fully sparse file space, rather than pass in an array of all
 * -1 file descriptors.
 */
#define IORING_RSRC_REGISTER_SPARSE	(1U << 0)

struct io_uring_rsrc_register {
	__u32 nr;
	__u32 flags;
	__u64 resv2;
	__aligned_u64 data;
	__aligned_u64 tags;
};

struct io_uring_rsrc_update {
	__u32 offset;
	__u32 resv;
	__aligned_u64 data;
};

struct io_uring_rsrc_update2 {
	__u32 offset;
	__u32 resv;
	__aligned_u64 data;
	__aligned_u64 tags;
	__u32 nr;
	__u32 resv2;
};

/* Skip updating fd indexes set to this value in the fd table */
#define IORING_REGISTER_FILES_SKIP	(-2)

#define IO_URING_OP_SUPPORTED	(1U << 0)

struct io_uring_probe_op {
	__u8 op;
	__u8 resv;
	__u16 flags;	/* IO_URING_OP_* flags */
	__u32 resv2;
};

struct io_uring_probe {
	__u8 last_op;	/* last opcode supported */
	__u8 ops_len;	/* length of ops[] array below */
	__u16 resv;
	__u32 resv2[3];
	struct io_uring_probe_op ops[];
};

struct io_uring_restriction {
	__u16 opcode;
	union {
		__u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */
		__u8 sqe_op;      /* IORING_RESTRICTION_SQE_OP */
		__u8 sqe_flags;   /* IORING_RESTRICTION_SQE_FLAGS_* */
	};
	__u8 resv;
	__u32 resv2[3];
};

struct io_uring_buf {
	__u64	addr;
	__u32	len;
	__u16	bid;
	__u16	resv;
};

struct io_uring_buf_ring {
	union {
		/*
		 * To avoid spilling into more pages than we need to, the
		 * ring tail is overlaid with the io_uring_buf->resv field.
		 */
		struct {
			__u64	resv1;
			__u32	resv2;
			__u16	resv3;
			__u16	tail;
		};
		__DECLARE_FLEX_ARRAY(struct io_uring_buf, bufs);
	};
};

/*
 * Flags for IORING_REGISTER_PBUF_RING.
 *
 * IOU_PBUF_RING_MMAP:	If set, kernel will allocate the memory for the ring.
 *			The application must not set a ring_addr in struct
 *			io_uring_buf_reg, instead it must subsequently call
 *			mmap(2) with the offset set as:
 *			IORING_OFF_PBUF_RING | (bgid << IORING_OFF_PBUF_SHIFT)
 *			to get a virtual mapping for the ring.
 */
enum io_uring_register_pbuf_ring_flags {
	IOU_PBUF_RING_MMAP	= 1,
};

/* argument for IORING_(UN)REGISTER_PBUF_RING */
struct io_uring_buf_reg {
	__u64	ring_addr;
	__u32	ring_entries;
	__u16	bgid;
	__u16	flags;
	__u64	resv[3];
};

/* argument for IORING_REGISTER_PBUF_STATUS */
struct io_uring_buf_status {
	__u32	buf_group;	/* input */
	__u32	head;		/* output */
	__u32	resv[8];
};

/* argument for IORING_(UN)REGISTER_NAPI */
struct io_uring_napi {
	__u32	busy_poll_to;
	__u8	prefer_busy_poll;
	__u8	pad[3];
	__u64	resv;
};

/*
 * io_uring_restriction->opcode values
 */
enum io_uring_register_restriction_op {
	/* Allow an io_uring_register(2) opcode */
	IORING_RESTRICTION_REGISTER_OP		= 0,

/* Allow an sqe opcode */
	IORING_RESTRICTION_SQE_OP		= 1,

/* Allow sqe flags */
	IORING_RESTRICTION_SQE_FLAGS_ALLOWED	= 2,

/* Require sqe flags (these flags must be set on each submission) */
	IORING_RESTRICTION_SQE_FLAGS_REQUIRED	= 3,

IORING_RESTRICTION_LAST
};

struct io_uring_getevents_arg {
	__u64	sigmask;
	__u32	sigmask_sz;
	__u32	pad;
	__u64	ts;
};

/*
 * Argument for IORING_REGISTER_SYNC_CANCEL
 */
struct io_uring_sync_cancel_reg {
	__u64				addr;
	__s32				fd;
	__u32				flags;
	struct __kernel_timespec	timeout;
	__u8				opcode;
	__u8				pad[7];
	__u64				pad2[3];
};

/*
 * Argument for IORING_REGISTER_FILE_ALLOC_RANGE
 * The range is specified as [off, off + len)
 */
struct io_uring_file_index_range {
	__u32	off;
	__u32	len;
	__u64	resv;
};

struct io_uring_recvmsg_out {
	__u32 namelen;
	__u32 controllen;
	__u32 payloadlen;
	__u32 flags;
};

/*
 * Argument for IORING_OP_URING_CMD when file is a socket
 */
enum io_uring_socket_op {
	SOCKET_URING_OP_SIOCINQ		= 0,
	SOCKET_URING_OP_SIOCOUTQ,
	SOCKET_URING_OP_GETSOCKOPT,
	SOCKET_URING_OP_SETSOCKOPT,
};

#ifdef __cplusplus
}
#endif

#endif

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