authorgravatar for quae@daurnimator.comdaurnimator <quae@daurnimator.com> 2019-05-20 23:25:47+10:00
committergravatar for quae@daurnimator.comdaurnimator <quae@daurnimator.com> 2019-06-10 14:40:54+10:00
log4565f50efe69cb394aed7d26341b917d2089b9d5
treefed7f0708a4c23edacd93075134021bb160b736a
parentae604b446488e2b0931e84c796819d3f817fa66f
signaturelock-open Commit is signed but in an unrecognized format.

std: add linux kernel definitions for io_uring

2 files changed, 138 insertions(+), 0 deletions(-)

std/os/bits/linux.zig+126
...@@ -967,3 +967,129 @@ pub const stack_t = extern struct {...@@ -967,3 +967,129 @@ pub const stack_t = extern struct {
967 ss_flags: i32,967 ss_flags: i32,
968 ss_size: isize,968 ss_size: isize,
969};969};
970
971pub const io_uring_params = extern struct {
972 sq_entries: u32,
973 cq_entries: u32,
974 flags: u32,
975 sq_thread_cpu: u32,
976 sq_thread_idle: u32,
977 resv: [5]u32,
978 sq_off: io_sqring_offsets,
979 cq_off: io_cqring_offsets,
980};
981
982// io_uring_params.flags
983
984/// io_context is polled
985pub const IORING_SETUP_IOPOLL = (1 << 0);
986
987/// SQ poll thread
988pub const IORING_SETUP_SQPOLL = (1 << 1);
989
990/// sq_thread_cpu is valid
991pub const IORING_SETUP_SQ_AFF = (1 << 2);
992
993pub const io_sqring_offsets = extern struct {
994 /// offset of ring head
995 head: u32,
996
997 /// offset of ring tail
998 tail: u32,
999
1000 /// ring mask value
1001 ring_mask: u32,
1002
1003 /// entries in ring
1004 ring_entries: u32,
1005
1006 /// ring flags
1007 flags: u32,
1008
1009 /// number of sqes not submitted
1010 dropped: u32,
1011
1012 /// sqe index array
1013 array: u32,
1014
1015 resv1: u32,
1016 resv2: u64,
1017};
1018
1019// io_sqring_offsets.flags
1020
1021/// needs io_uring_enter wakeup
1022pub const IORING_SQ_NEED_WAKEUP = 1 << 0;
1023
1024pub const io_cqring_offsets = extern struct {
1025 head: u32,
1026 tail: u32,
1027 ring_mask: u32,
1028 ring_entries: u32,
1029 overflow: u32,
1030 cqes: u32,
1031 resv: [2]u64,
1032};
1033
1034pub const io_uring_sqe = extern struct {
1035 opcode: u8,
1036 flags: u8,
1037 ioprio: u16,
1038 fd: i32,
1039 off: u64,
1040 addr: u64,
1041 len: u32,
1042 pub const union1 = extern union {
1043 rw_flags: kernel_rwf,
1044 fsync_flags: u32,
1045 poll_event: u16,
1046 };
1047 union1: union1,
1048 user_data: u64,
1049 pub const union2 = extern union {
1050 buf_index: u16,
1051 __pad2: [3]u64,
1052 };
1053 union2: union2,
1054};
1055
1056// io_uring_sqe.flags
1057
1058/// use fixed fileset
1059pub const IOSQE_FIXED_FILE = (1 << 0);
1060
1061pub const IORING_OP_NOP = 0;
1062pub const IORING_OP_READV = 1;
1063pub const IORING_OP_WRITEV = 2;
1064pub const IORING_OP_FSYNC = 3;
1065pub const IORING_OP_READ_FIXED = 4;
1066pub const IORING_OP_WRITE_FIXED = 5;
1067pub const IORING_OP_POLL_ADD = 6;
1068pub const IORING_OP_POLL_REMOVE = 7;
1069
1070// io_uring_sqe.fsync_flags
1071pub const IORING_FSYNC_DATASYNC = (1 << 0);
1072
1073// IO completion data structure (Completion Queue Entry)
1074pub const io_uring_cqe = extern struct {
1075 /// io_uring_sqe.data submission passed back
1076 user_data: u64,
1077
1078 /// result code for this event
1079 res: i32,
1080 flags: u32,
1081};
1082
1083pub const IORING_OFF_SQ_RING = 0;
1084pub const IORING_OFF_CQ_RING = 0x8000000;
1085pub const IORING_OFF_SQES = 0x10000000;
1086
1087// io_uring_enter flags
1088pub const IORING_ENTER_GETEVENTS = (1 << 0);
1089pub const IORING_ENTER_SQ_WAKEUP = (1 << 1);
1090
1091// io_uring_register opcodes and arguments
1092pub const IORING_REGISTER_BUFFERS = 0;
1093pub const IORING_UNREGISTER_BUFFERS = 1;
1094pub const IORING_REGISTER_FILES = 2;
1095pub const IORING_UNREGISTER_FILES = 3;
std/os/linux.zig+12
...@@ -895,6 +895,18 @@ pub fn dl_iterate_phdr(comptime T: type, callback: extern fn (info: *dl_phdr_inf...@@ -895,6 +895,18 @@ pub fn dl_iterate_phdr(comptime T: type, callback: extern fn (info: *dl_phdr_inf
895 return last_r;895 return last_r;
896}896}
897897
898pub fn io_uring_setup(entries: u32, p: *io_uring_params) usize {
899 return syscall2(SYS_io_uring_setup, entries, @ptrToInt(p));
900}
901
902pub fn io_uring_enter(fd: i32, to_submit: u32, min_complete: u32, flags: u32, sig: ?*sigset_t) usize {
903 return syscall6(SYS_io_uring_enter, @bitCast(usize, isize(fd)), to_submit, min_complete, flags, @ptrToInt(sig), NSIG / 8);
904}
905
906pub fn io_uring_register(fd: i32, opcode: u32, arg: ?*const c_void, nr_args: u32) usize {
907 return syscall4(SYS_io_uring_register, @bitCast(usize, isize(fd)), opcode, @ptrToInt(arg), nr_args);
908}
909
898test "" {910test "" {
899 if (is_the_target) {911 if (is_the_target) {
900 _ = @import("linux/test.zig");912 _ = @import("linux/test.zig");