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2403 Commits

Author SHA1 Message Date
Joran Dirk Greef
a9b107045f Use load acquire semantics when reading the SQPOLL wakeup flag 
Ensures that the wakeup flag is read after the tail pointer has been
written. It's important to use memory load acquire semantics for the
flags read, otherwise the application and the kernel might not agree on
the consistency of the wakeup flag, leading to I/O starvation.

Refs: 6768ddcc56
Refs: https://github.com/axboe/liburing/issues/219
 2020-10-03 14:34:42 +02:00
Joran Dirk Greef
95def89c23 Handle EBADFD (ring fd in bad state) in enter() 2020-10-03 14:34:01 +02:00
Joran Dirk Greef
5f99d2c240 Define SPLICE, PROVIDE_BUFFERS, REMOVE_BUFFERS and TEE opcodes and flags 2020-09-21 20:15:14 +02:00
Joran Dirk Greef
2d8df2b745 Use @intCast instead of @truncate 2020-09-21 12:03:52 +02:00
Joran Dirk Greef
7719abbf54 Add flags to queue_fsync() signature as per liburing 2020-09-21 11:09:37 +02:00
Joran Dirk Greef
57603fd26d Use @intCast instead of @truncate on io_uring_enter() result 2020-09-21 11:09:09 +02:00
Joran Dirk Greef
575ed941d7 Cache mask instead of dereferencing mask pointer 2020-09-21 11:07:11 +02:00
Joran Dirk Greef
843c104fc9 Add io_uring syscalls to os.bits.linux.mips.SYS 
As per lib/libc/musl/arch/mips/bits/syscall.h.in:

```c
```
 2020-09-21 10:39:58 +02:00
Joran Dirk Greef
a853f00410 Add IORING_FEAT_FAST_POLL 2020-09-20 19:51:23 +02:00
Joran Dirk Greef
77903f8d4e Test structs and offsets 2020-09-20 18:45:44 +02:00
Joran Dirk Greef
e51728a1b4 Make enter(), flush_sq(), sq_ring_needs_enter(), cq_ring_needs_flush() public 
These will also be needed by any custom helpers
 2020-09-20 15:54:31 +02:00
Joran Dirk Greef
40293a0643 Add safety checks 2020-09-20 15:41:22 +02:00
Joran Dirk Greef
f22eea82c4 Fix opcode support detection for read/write test 2020-09-20 15:33:48 +02:00
Joran Dirk Greef
b672dc7abf Use os.fd_t instead of i32 and assert against c_int for syscall safety 2020-09-20 14:59:40 +02:00
Joran Dirk Greef
abebacda32 Handle all possible syscall errors and bring errors in line with os.zig 2020-09-20 14:21:44 +02:00
Joran Dirk Greef
4bc1b7a7ac Fix io_uring_sqe to use the names of the first member of each union 
Now we're really future-proof... no more `opflags` creeping in.

When anonymous unions land, we can start using `accept_flags` etc.

Until then, code using this struct won't break when the kernel adds features.

Refs: https://github.com/ziglang/zig/issues/6349
Refs: https://github.com/ziglang/zig/issues/985
 2020-09-19 18:50:24 +02:00
Joran Dirk Greef
92407bfcd7 Upgrade check_errno() to an exhaustive switch (safer) 2020-09-19 18:29:50 +02:00
Joran Dirk Greef
ba18420b27 Zero the SQE slot and assign, instead of initializing with default values 2020-09-19 18:17:06 +02:00
Joran Dirk Greef
e7ae6f2fad Remove default values from io_uring_sqe struct 2020-09-19 18:14:41 +02:00
Joran Dirk Greef
f4df2f091a Allow the kernel to drive feature detection 2020-09-19 17:31:39 +02:00
Joran Dirk Greef
64ae9a6a87 Rename to error.SubmissionQueueFull 2020-09-19 16:54:44 +02:00
Joran Dirk Greef
c1f9d10b6a Remove unused import aliases 2020-09-19 16:51:35 +02:00
Joran Dirk Greef
9fabae2a28 Return error.UnsupportedKernel for ENOSYS 2020-09-19 16:47:05 +02:00
Joran Dirk Greef
0d8c6a960f Remove dangling @import from std 2020-09-19 16:45:52 +02:00
Joran Dirk Greef
cb591285d7 Use linux.IORING_SQ_CQ_OVERFLOW 2020-09-19 16:20:21 +02:00
Joran Dirk Greef
31533eb743 Move to std/os/linux 2020-09-19 16:18:04 +02:00
Joran Dirk Greef
873d1c80b3 Add splice_fd_in to io_uring_sqe and future-proof for anonymous unions 2020-09-19 16:15:17 +02:00
Joran Dirk Greef
09f2f4aeb3 Fix std @import 2020-09-19 15:14:47 +02:00
Joran Dirk Greef
b2a54b9581 Test IORING_REGISTER_FILES but avoid sparse fd sets 2020-09-19 15:07:10 +02:00
Joran Dirk Greef
5df0d284d0 Do not register /dev/zero as an fd when testing queue_readv() 2020-09-19 14:29:23 +02:00
Joran Dirk Greef
ee5931908e @ptrCast fds.ptr to *const c_void for io_uring_register() 2020-09-19 13:25:59 +02:00
Joran Dirk Greef
8b030a6599 Use x.y for C-style x->y instead of x.*.y 2020-09-17 20:29:56 +02:00
Joran Dirk Greef
e33c466daf Use std.builtin 2020-09-17 19:56:57 +02:00
Joran Dirk Greef
d966fe6319 Add IORING_SQ_CQ_OVERFLOW to std/os/bits/linux.zig 2020-09-17 19:53:34 +02:00
Joran Dirk Greef
21c81360ba Remove comment 2020-09-17 19:44:53 +02:00
Joran Dirk Greef
ac1d9f716a Use != 0 for bitwise flag conditions 2020-09-17 19:37:17 +02:00
Joran Dirk Greef
491a434b01 Check kernel support for single_mmap, accept, and read/write 2020-09-16 19:36:29 +02:00
Joran Dirk Greef
6f09796ff2 Add short license and copyright notice 2020-09-16 18:51:21 +02:00
Joran Dirk Greef
b340bbfc1d std: add io_uring library 
This brings io_uring helper methods to Zig for kernels >= 5.4.

We follow liburing's design decisions so that anyone who is comfortable with
liburing (https://unixism.net/loti/ref-liburing/index.html) will feel at home.

Thanks to @daurnimator for the first draft.

Refs: https://github.com/ziglang/zig/pull/3083
Signed-off-by: Joran Dirk Greef <joran@coil.com>
 2020-09-16 15:07:13 +02:00
Andrew Kelley
281fc10ec5 std.crypto siphash: fix assertion on the size of output buffer 
the logic was backwards
 2020-09-16 02:24:36 -07:00
Andrew Kelley
b3cc36857e
Merge pull request #6340 from Vexu/fix 
Fixes
 2020-09-15 14:28:16 -04:00
LemonBoy
c1c3212500 std: Fix typo in ELF section header iterator 
The code accidentally used the phdr offset instead of the shdr one while
iterating over the section headers.

Fixes #6338
 2020-09-15 18:14:06 +03:00
Vexu
a3624e94f8
translate-c: determine sizeof using std.meta.sizeof 2020-09-14 23:53:38 +03:00
Vexu
29fd0c6d61
fix meta.cast behavior; add exhaustive tests 2020-09-14 23:21:26 +03:00
Veikka Tuominen
d073836894
Merge pull request #6172 from tadeokondrak/@Type(.Union) 
Implement @Type for Union
 2020-09-14 16:43:49 +03:00
Andrew Kelley
c49435f76b
Merge pull request #6331 from mattnite/bpf-helper-defs 
BPF: helper definitions
 2020-09-14 04:00:00 -04:00
LemonBoy
61e9e82bdc std: Make the CRC32 calculation slightly faster 
Speed up a little the slicing-by-8 code path by replacing the
(load+shift+xor)*4 sequence with a single u32 load plus a xor.

Before:

```
iterative:  1018 MiB/s [000000006c3b110d]
small keys:  1075 MiB/s [0035bf3dcac00000]
```

After:

```
iterative:  1114 MiB/s [000000006c3b110d]
small keys:  1324 MiB/s [0035bf3dcac00000]
```
 2020-09-13 16:32:21 -04:00
LemonBoy
5e50d145d9 std: Limit the read/write size on Darwin 
It turns out that the kernel won't read or write more than 0x7fffffff
bytes in a single call, failing with EINVAL when trying to do so.

Adjust the limit and curse whoever is responsible for this.

Closes #6332
 2020-09-13 16:31:21 -04:00
Matt Knight
88dacd3b70
changed to opaque 2020-09-13 09:53:20 -07:00
Matt Knight
1afbf4fb21
removed all those kern aliases 2020-09-13 09:43:49 -07:00