forked from hakasenyang/openssl-patch
-
Notifications
You must be signed in to change notification settings - Fork 0
/
nginx_io_uring.patch
542 lines (477 loc) · 16.3 KB
/
nginx_io_uring.patch
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
From a052b2d1adf583233454a6d7f89963544714ff58 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=80=9A=E6=B4=B2?= <[email protected]>
Date: Fri, 14 Aug 2020 10:44:44 +0800
Subject: [PATCH] Add io_uring support
---
auto/unix | 39 ++---
src/core/ngx_open_file_cache.c | 6 +-
src/event/modules/ngx_epoll_module.c | 225 ++++++---------------------
src/event/ngx_event.h | 4 +-
src/os/unix/ngx_linux_aio_read.c | 63 +++++---
src/os/unix/ngx_linux_config.h | 4 -
6 files changed, 98 insertions(+), 243 deletions(-)
diff --git a/auto/unix b/auto/unix
index ff9697a..2e2f63a 100644
--- a/auto/unix
+++ b/auto/unix
@@ -532,44 +532,23 @@ if [ $NGX_FILE_AIO = YES ]; then
if [ $ngx_found = no ]; then
- ngx_feature="Linux AIO support"
+ ngx_feature="Linux io_uring support (liburing)"
ngx_feature_name="NGX_HAVE_FILE_AIO"
ngx_feature_run=no
- ngx_feature_incs="#include <linux/aio_abi.h>
- #include <sys/eventfd.h>"
+ ngx_feature_incs="#include <liburing.h>"
ngx_feature_path=
- ngx_feature_libs=
- ngx_feature_test="struct iocb iocb;
- iocb.aio_lio_opcode = IOCB_CMD_PREAD;
- iocb.aio_flags = IOCB_FLAG_RESFD;
- iocb.aio_resfd = -1;
- (void) iocb;
- (void) eventfd(0, 0)"
+ ngx_feature_libs="-luring"
+ ngx_feature_test="struct io_uring ring;
+ int ret = io_uring_queue_init(64, &ring, 0);
+ if (ret < 0) return 1;
+ io_uring_queue_exit(&ring);"
. auto/feature
if [ $ngx_found = yes ]; then
have=NGX_HAVE_EVENTFD . auto/have
have=NGX_HAVE_SYS_EVENTFD_H . auto/have
CORE_SRCS="$CORE_SRCS $LINUX_AIO_SRCS"
- fi
- fi
-
- if [ $ngx_found = no ]; then
-
- ngx_feature="Linux AIO support (SYS_eventfd)"
- ngx_feature_incs="#include <linux/aio_abi.h>
- #include <sys/syscall.h>"
- ngx_feature_test="struct iocb iocb;
- iocb.aio_lio_opcode = IOCB_CMD_PREAD;
- iocb.aio_flags = IOCB_FLAG_RESFD;
- iocb.aio_resfd = -1;
- (void) iocb;
- (void) SYS_eventfd"
- . auto/feature
-
- if [ $ngx_found = yes ]; then
- have=NGX_HAVE_EVENTFD . auto/have
- CORE_SRCS="$CORE_SRCS $LINUX_AIO_SRCS"
+ CORE_LIBS="$CORE_LIBS -luring"
fi
fi
@@ -577,7 +556,7 @@ if [ $NGX_FILE_AIO = YES ]; then
cat << END
$0: no supported file AIO was found
-Currently file AIO is supported on FreeBSD 4.3+ and Linux 2.6.22+ only
+Currently file AIO is supported on FreeBSD 4.3+ and Linux 5.1.0+ (requires liburing) only
END
exit 1
diff --git a/src/core/ngx_open_file_cache.c b/src/core/ngx_open_file_cache.c
index b23ee78..682d48c 100644
--- a/src/core/ngx_open_file_cache.c
+++ b/src/core/ngx_open_file_cache.c
@@ -869,11 +869,11 @@ ngx_open_and_stat_file(ngx_str_t *name, ngx_open_file_info_t *of,
if (!of->log) {
/*
- * Use non-blocking open() not to hang on FIFO files, etc.
- * This flag has no effect on a regular files.
+ * Differs from plain read, IORING_OP_READV with O_NONBLOCK
+ * will return -EAGAIN if the operation may block.
*/
- fd = ngx_open_file_wrapper(name, of, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
+ fd = ngx_open_file_wrapper(name, of, NGX_FILE_RDONLY,
NGX_FILE_OPEN, 0, log);
} else {
diff --git a/src/event/modules/ngx_epoll_module.c b/src/event/modules/ngx_epoll_module.c
index 98e3ce7..09dda1d 100644
--- a/src/event/modules/ngx_epoll_module.c
+++ b/src/event/modules/ngx_epoll_module.c
@@ -9,6 +9,10 @@
#include <ngx_core.h>
#include <ngx_event.h>
+#if (NGX_HAVE_FILE_AIO)
+#include <liburing.h>
+#endif
+
#if (NGX_TEST_BUILD_EPOLL)
@@ -75,23 +79,6 @@ int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout)
#define SYS_eventfd 323
#endif
-#if (NGX_HAVE_FILE_AIO)
-
-#define SYS_io_setup 245
-#define SYS_io_destroy 246
-#define SYS_io_getevents 247
-
-typedef u_int aio_context_t;
-
-struct io_event {
- uint64_t data; /* the data field from the iocb */
- uint64_t obj; /* what iocb this event came from */
- int64_t res; /* result code for this event */
- int64_t res2; /* secondary result */
-};
-
-
-#endif
#endif /* NGX_TEST_BUILD_EPOLL */
@@ -124,7 +111,7 @@ static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
ngx_uint_t flags);
#if (NGX_HAVE_FILE_AIO)
-static void ngx_epoll_eventfd_handler(ngx_event_t *ev);
+static void ngx_epoll_io_uring_handler(ngx_event_t *ev);
#endif
static void *ngx_epoll_create_conf(ngx_cycle_t *cycle);
@@ -141,13 +128,11 @@ static ngx_connection_t notify_conn;
#endif
#if (NGX_HAVE_FILE_AIO)
+struct io_uring ngx_ring;
+struct io_uring_params ngx_ring_params;
-int ngx_eventfd = -1;
-aio_context_t ngx_aio_ctx = 0;
-
-static ngx_event_t ngx_eventfd_event;
-static ngx_connection_t ngx_eventfd_conn;
-
+static ngx_event_t ngx_ring_event;
+static ngx_connection_t ngx_ring_conn;
#endif
#if (NGX_HAVE_EPOLLRDHUP)
@@ -217,102 +202,40 @@ ngx_module_t ngx_epoll_module = {
#if (NGX_HAVE_FILE_AIO)
-/*
- * We call io_setup(), io_destroy() io_submit(), and io_getevents() directly
- * as syscalls instead of libaio usage, because the library header file
- * supports eventfd() since 0.3.107 version only.
- */
-
-static int
-io_setup(u_int nr_reqs, aio_context_t *ctx)
-{
- return syscall(SYS_io_setup, nr_reqs, ctx);
-}
-
-
-static int
-io_destroy(aio_context_t ctx)
-{
- return syscall(SYS_io_destroy, ctx);
-}
-
-
-static int
-io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events,
- struct timespec *tmo)
-{
- return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo);
-}
-
-
static void
ngx_epoll_aio_init(ngx_cycle_t *cycle, ngx_epoll_conf_t *epcf)
{
- int n;
struct epoll_event ee;
-#if (NGX_HAVE_SYS_EVENTFD_H)
- ngx_eventfd = eventfd(0, 0);
-#else
- ngx_eventfd = syscall(SYS_eventfd, 0);
-#endif
-
- if (ngx_eventfd == -1) {
- ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
- "eventfd() failed");
- ngx_file_aio = 0;
- return;
- }
-
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
- "eventfd: %d", ngx_eventfd);
-
- n = 1;
-
- if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
- ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
- "ioctl(eventfd, FIONBIO) failed");
- goto failed;
- }
-
- if (io_setup(epcf->aio_requests, &ngx_aio_ctx) == -1) {
+ if (io_uring_queue_init_params(64, &ngx_ring, &ngx_ring_params) < 0) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
- "io_setup() failed");
+ "io_uring_queue_init_params() failed");
goto failed;
}
- ngx_eventfd_event.data = &ngx_eventfd_conn;
- ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
- ngx_eventfd_event.log = cycle->log;
- ngx_eventfd_event.active = 1;
- ngx_eventfd_conn.fd = ngx_eventfd;
- ngx_eventfd_conn.read = &ngx_eventfd_event;
- ngx_eventfd_conn.log = cycle->log;
+ ngx_ring_event.data = &ngx_ring_conn;
+ ngx_ring_event.handler = ngx_epoll_io_uring_handler;
+ ngx_ring_event.log = cycle->log;
+ ngx_ring_event.active = 1;
+ ngx_ring_conn.fd = ngx_ring.ring_fd;
+ ngx_ring_conn.read = &ngx_ring_event;
+ ngx_ring_conn.log = cycle->log;
ee.events = EPOLLIN|EPOLLET;
- ee.data.ptr = &ngx_eventfd_conn;
+ ee.data.ptr = &ngx_ring_conn;
- if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) {
+ if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_ring.ring_fd, &ee) != -1) {
return;
}
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
- if (io_destroy(ngx_aio_ctx) == -1) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- "io_destroy() failed");
- }
+ io_uring_queue_exit(&ngx_ring);
failed:
- if (close(ngx_eventfd) == -1) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- "eventfd close() failed");
- }
-
- ngx_eventfd = -1;
- ngx_aio_ctx = 0;
+ ngx_ring.ring_fd = 0;
ngx_file_aio = 0;
}
@@ -549,23 +472,11 @@ ngx_epoll_done(ngx_cycle_t *cycle)
#if (NGX_HAVE_FILE_AIO)
- if (ngx_eventfd != -1) {
-
- if (io_destroy(ngx_aio_ctx) == -1) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- "io_destroy() failed");
- }
-
- if (close(ngx_eventfd) == -1) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- "eventfd close() failed");
- }
-
- ngx_eventfd = -1;
+ if (ngx_ring.ring_fd != 0) {
+ io_uring_queue_exit(&ngx_ring);
+ ngx_ring.ring_fd = 0;
}
- ngx_aio_ctx = 0;
-
#endif
ngx_free(event_list);
@@ -939,84 +850,36 @@ ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags)
#if (NGX_HAVE_FILE_AIO)
static void
-ngx_epoll_eventfd_handler(ngx_event_t *ev)
+ngx_epoll_io_uring_handler(ngx_event_t *ev)
{
- int n, events;
- long i;
- uint64_t ready;
- ngx_err_t err;
ngx_event_t *e;
+ struct io_uring_cqe *cqe;
+ unsigned head;
+ unsigned cqe_count = 0;
ngx_event_aio_t *aio;
- struct io_event event[64];
- struct timespec ts;
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd handler");
+ ngx_log_debug(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+ "io_uring_peek_cqe: START");
- n = read(ngx_eventfd, &ready, 8);
+ io_uring_for_each_cqe(&ngx_ring, head, cqe) {
+ ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+ "io_event: %p %d %d",
+ cqe->user_data, cqe->res, cqe->flags);
- err = ngx_errno;
+ e = (ngx_event_t *) io_uring_cqe_get_data(cqe);
+ e->complete = 1;
+ e->active = 0;
+ e->ready = 1;
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd: %d", n);
+ aio = e->data;
+ aio->res = cqe->res;
- if (n != 8) {
- if (n == -1) {
- if (err == NGX_EAGAIN) {
- return;
- }
+ ++cqe_count;
- ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read(eventfd) failed");
- return;
- }
-
- ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
- "read(eventfd) returned only %d bytes", n);
- return;
+ ngx_post_event(e, &ngx_posted_events);
}
- ts.tv_sec = 0;
- ts.tv_nsec = 0;
-
- while (ready) {
-
- events = io_getevents(ngx_aio_ctx, 1, 64, event, &ts);
-
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
- "io_getevents: %d", events);
-
- if (events > 0) {
- ready -= events;
-
- for (i = 0; i < events; i++) {
-
- ngx_log_debug4(NGX_LOG_DEBUG_EVENT, ev->log, 0,
- "io_event: %XL %XL %L %L",
- event[i].data, event[i].obj,
- event[i].res, event[i].res2);
-
- e = (ngx_event_t *) (uintptr_t) event[i].data;
-
- e->complete = 1;
- e->active = 0;
- e->ready = 1;
-
- aio = e->data;
- aio->res = event[i].res;
-
- ngx_post_event(e, &ngx_posted_events);
- }
-
- continue;
- }
-
- if (events == 0) {
- return;
- }
-
- /* events == -1 */
- ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
- "io_getevents() failed");
- return;
- }
+ io_uring_cq_advance(&ngx_ring, cqe_count);
}
#endif
diff --git a/src/event/ngx_event.h b/src/event/ngx_event.h
index 97f9673..eb17346 100644
--- a/src/event/ngx_event.h
+++ b/src/event/ngx_event.h
@@ -160,7 +160,9 @@ struct ngx_event_aio_s {
size_t nbytes;
#endif
- ngx_aiocb_t aiocb;
+ /* Make sure that this iov has the same lifecycle with its associated aio event */
+ struct iovec iov;
+
ngx_event_t event;
};
diff --git a/src/os/unix/ngx_linux_aio_read.c b/src/os/unix/ngx_linux_aio_read.c
index 9f0a6c1..033bd56 100644
--- a/src/os/unix/ngx_linux_aio_read.c
+++ b/src/os/unix/ngx_linux_aio_read.c
@@ -9,19 +9,15 @@
#include <ngx_core.h>
#include <ngx_event.h>
+#include <liburing.h>
-extern int ngx_eventfd;
-extern aio_context_t ngx_aio_ctx;
+extern struct io_uring ngx_ring;
+extern struct io_uring_params ngx_ring_params;
-static void ngx_file_aio_event_handler(ngx_event_t *ev);
+static void ngx_file_aio_event_handler(ngx_event_t *ev);
-static int
-io_submit(aio_context_t ctx, long n, struct iocb **paiocb)
-{
- return syscall(SYS_io_submit, ctx, n, paiocb);
-}
ngx_int_t
@@ -50,10 +46,10 @@ ssize_t
ngx_file_aio_read(ngx_file_t *file, u_char *buf, size_t size, off_t offset,
ngx_pool_t *pool)
{
- ngx_err_t err;
- struct iocb *piocb[1];
- ngx_event_t *ev;
- ngx_event_aio_t *aio;
+ ngx_err_t err;
+ ngx_event_t *ev;
+ ngx_event_aio_t *aio;
+ struct io_uring_sqe *sqe;
if (!ngx_file_aio) {
return ngx_read_file(file, buf, size, offset);
@@ -93,22 +89,41 @@ ngx_file_aio_read(ngx_file_t *file, u_char *buf, size_t size, off_t offset,
return NGX_ERROR;
}
- ngx_memzero(&aio->aiocb, sizeof(struct iocb));
+ sqe = io_uring_get_sqe(&ngx_ring);
- aio->aiocb.aio_data = (uint64_t) (uintptr_t) ev;
- aio->aiocb.aio_lio_opcode = IOCB_CMD_PREAD;
- aio->aiocb.aio_fildes = file->fd;
- aio->aiocb.aio_buf = (uint64_t) (uintptr_t) buf;
- aio->aiocb.aio_nbytes = size;
- aio->aiocb.aio_offset = offset;
- aio->aiocb.aio_flags = IOCB_FLAG_RESFD;
- aio->aiocb.aio_resfd = ngx_eventfd;
+ if (!sqe) {
+ ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
+ "aio no sqe left:%d @%O:%uz %V",
+ ev->complete, offset, size, &file->name);
+ return ngx_read_file(file, buf, size, offset);
+ }
- ev->handler = ngx_file_aio_event_handler;
+ if (__builtin_expect(!!(ngx_ring_params.features & IORING_FEAT_CUR_PERSONALITY), 1)) {
+ /*
+ * `io_uring_prep_read` is faster than `io_uring_prep_readv`, because the kernel
+ * doesn't need to import iovecs in advance.
+ *
+ * If the kernel supports `IORING_FEAT_CUR_PERSONALITY`, it should support
+ * non-vectored read/write commands too.
+ *
+ * It's not perfect, but avoids an extra feature-test syscall.
+ */
+ io_uring_prep_read(sqe, file->fd, buf, size, offset);
+ } else {
+ /*
+ * We must store iov into heap to prevent kernel from returning -EFAULT
+ * in case `IORING_FEAT_SUBMIT_STABLE` is not supported
+ */
+ aio->iov.iov_base = buf;
+ aio->iov.iov_len = size;
+ io_uring_prep_readv(sqe, file->fd, &aio->iov, 1, offset);
+ }
+ io_uring_sqe_set_data(sqe, ev);
- piocb[0] = &aio->aiocb;
- if (io_submit(ngx_aio_ctx, 1, piocb) == 1) {
+ ev->handler = ngx_file_aio_event_handler;
+
+ if (io_uring_submit(&ngx_ring) == 1) {
ev->active = 1;
ev->ready = 0;
ev->complete = 0;
diff --git a/src/os/unix/ngx_linux_config.h b/src/os/unix/ngx_linux_config.h
index 3036cae..0e461dd 100644
--- a/src/os/unix/ngx_linux_config.h
+++ b/src/os/unix/ngx_linux_config.h
@@ -93,10 +93,6 @@ extern ssize_t sendfile(int s, int fd, int32_t *offset, size_t size);
#include <sys/eventfd.h>
#endif
#include <sys/syscall.h>
-#if (NGX_HAVE_FILE_AIO)
-#include <linux/aio_abi.h>
-typedef struct iocb ngx_aiocb_t;
-#endif
#if (NGX_HAVE_CAPABILITIES)
--
2.25.1