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16 package io.netty.channel.uring;
17
18 import io.netty.channel.DefaultFileRegion;
19 import io.netty.channel.unix.Buffer;
20 import io.netty.util.internal.ObjectUtil;
21 import io.netty.util.internal.logging.InternalLogger;
22 import io.netty.util.internal.logging.InternalLoggerFactory;
23 import io.netty.channel.unix.FileDescriptor;
24 import io.netty.channel.unix.PeerCredentials;
25 import io.netty.channel.unix.Unix;
26 import io.netty.util.internal.ClassInitializerUtil;
27 import io.netty.util.internal.NativeLibraryLoader;
28 import io.netty.util.internal.PlatformDependent;
29 import io.netty.util.internal.SystemPropertyUtil;
30 import io.netty.util.internal.ThrowableUtil;
31
32 import java.io.File;
33 import java.io.IOException;
34 import java.nio.channels.Selector;
35 import java.nio.file.Path;
36 import java.util.Arrays;
37 import java.util.Locale;
38
39 final class Native {
40 private static final InternalLogger logger = InternalLoggerFactory.getInstance(Native.class);
41 static final int DEFAULT_RING_SIZE = Math.max(64, SystemPropertyUtil.getInt("io.netty.iouring.ringSize", 4096));
42
43 static {
44 Selector selector = null;
45 try {
46
47
48
49
50 selector = Selector.open();
51 } catch (IOException ignore) {
52
53 }
54
55
56
57
58
59
60 ClassInitializerUtil.tryLoadClasses(
61 Native.class,
62
63 PeerCredentials.class, java.io.FileDescriptor.class
64 );
65
66 File tmpDir = PlatformDependent.tmpdir();
67 Path tmpFile = tmpDir.toPath().resolve("netty_io_uring.tmp");
68 try {
69
70
71 Native.createFile(tmpFile.toString());
72 } catch (UnsatisfiedLinkError ignore) {
73
74 loadNativeLibrary();
75 } finally {
76 tmpFile.toFile().delete();
77 try {
78 if (selector != null) {
79 selector.close();
80 }
81 } catch (IOException ignore) {
82
83 }
84 }
85 Unix.registerInternal(Native::registerUnix);
86 }
87
88 static final int SOCK_NONBLOCK = NativeStaticallyReferencedJniMethods.sockNonblock();
89 static final int SOCK_CLOEXEC = NativeStaticallyReferencedJniMethods.sockCloexec();
90 static final short AF_INET = (short) NativeStaticallyReferencedJniMethods.afInet();
91 static final short AF_INET6 = (short) NativeStaticallyReferencedJniMethods.afInet6();
92 static final int SIZEOF_SOCKADDR_STORAGE = NativeStaticallyReferencedJniMethods.sizeofSockaddrStorage();
93 static final int SIZEOF_SOCKADDR_IN = NativeStaticallyReferencedJniMethods.sizeofSockaddrIn();
94 static final int SIZEOF_SOCKADDR_IN6 = NativeStaticallyReferencedJniMethods.sizeofSockaddrIn6();
95 static final int SOCKADDR_IN_OFFSETOF_SIN_FAMILY =
96 NativeStaticallyReferencedJniMethods.sockaddrInOffsetofSinFamily();
97 static final int SOCKADDR_IN_OFFSETOF_SIN_PORT = NativeStaticallyReferencedJniMethods.sockaddrInOffsetofSinPort();
98 static final int SOCKADDR_IN_OFFSETOF_SIN_ADDR = NativeStaticallyReferencedJniMethods.sockaddrInOffsetofSinAddr();
99 static final int IN_ADDRESS_OFFSETOF_S_ADDR = NativeStaticallyReferencedJniMethods.inAddressOffsetofSAddr();
100 static final int SOCKADDR_IN6_OFFSETOF_SIN6_FAMILY =
101 NativeStaticallyReferencedJniMethods.sockaddrIn6OffsetofSin6Family();
102 static final int SOCKADDR_IN6_OFFSETOF_SIN6_PORT =
103 NativeStaticallyReferencedJniMethods.sockaddrIn6OffsetofSin6Port();
104 static final int SOCKADDR_IN6_OFFSETOF_SIN6_FLOWINFO =
105 NativeStaticallyReferencedJniMethods.sockaddrIn6OffsetofSin6Flowinfo();
106 static final int SOCKADDR_IN6_OFFSETOF_SIN6_ADDR =
107 NativeStaticallyReferencedJniMethods.sockaddrIn6OffsetofSin6Addr();
108 static final int SOCKADDR_IN6_OFFSETOF_SIN6_SCOPE_ID =
109 NativeStaticallyReferencedJniMethods.sockaddrIn6OffsetofSin6ScopeId();
110 static final int IN6_ADDRESS_OFFSETOF_S6_ADDR = NativeStaticallyReferencedJniMethods.in6AddressOffsetofS6Addr();
111 static final int SIZEOF_SIZE_T = NativeStaticallyReferencedJniMethods.sizeofSizeT();
112 static final int SIZEOF_IOVEC = NativeStaticallyReferencedJniMethods.sizeofIovec();
113 static final int CMSG_SPACE = NativeStaticallyReferencedJniMethods.cmsgSpace();
114 static final int CMSG_LEN = NativeStaticallyReferencedJniMethods.cmsgLen();
115 static final int CMSG_OFFSETOF_CMSG_LEN = NativeStaticallyReferencedJniMethods.cmsghdrOffsetofCmsgLen();
116 static final int CMSG_OFFSETOF_CMSG_LEVEL = NativeStaticallyReferencedJniMethods.cmsghdrOffsetofCmsgLevel();
117 static final int CMSG_OFFSETOF_CMSG_TYPE = NativeStaticallyReferencedJniMethods.cmsghdrOffsetofCmsgType();
118
119 static final int IO_URING_BUFFER_RING_TAIL = NativeStaticallyReferencedJniMethods.ioUringBufferRingOffsetTail();
120
121 static final int IOVEC_OFFSETOF_IOV_BASE = NativeStaticallyReferencedJniMethods.iovecOffsetofIovBase();
122 static final int IOVEC_OFFSETOF_IOV_LEN = NativeStaticallyReferencedJniMethods.iovecOffsetofIovLen();
123 static final int SIZEOF_MSGHDR = NativeStaticallyReferencedJniMethods.sizeofMsghdr();
124 static final int MSGHDR_OFFSETOF_MSG_NAME = NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgName();
125 static final int MSGHDR_OFFSETOF_MSG_NAMELEN = NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgNamelen();
126 static final int MSGHDR_OFFSETOF_MSG_IOV = NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgIov();
127 static final int MSGHDR_OFFSETOF_MSG_IOVLEN = NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgIovlen();
128 static final int MSGHDR_OFFSETOF_MSG_CONTROL = NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgControl();
129 static final int MSGHDR_OFFSETOF_MSG_CONTROLLEN =
130 NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgControllen();
131 static final int MSGHDR_OFFSETOF_MSG_FLAGS = NativeStaticallyReferencedJniMethods.msghdrOffsetofMsgFlags();
132 static final int POLLIN = NativeStaticallyReferencedJniMethods.pollin();
133 static final int POLLOUT = NativeStaticallyReferencedJniMethods.pollout();
134 static final int POLLRDHUP = NativeStaticallyReferencedJniMethods.pollrdhup();
135 static final int ERRNO_ECANCELED_NEGATIVE = -NativeStaticallyReferencedJniMethods.ecanceled();
136 static final int ERRNO_ETIME_NEGATIVE = -NativeStaticallyReferencedJniMethods.etime();
137 static final int ERRNO_NOBUFS_NEGATIVE = -NativeStaticallyReferencedJniMethods.enobufs();
138
139 static final int PAGE_SIZE = NativeStaticallyReferencedJniMethods.pageSize();
140
141 static final int SIZEOF_IOURING_BUF = NativeStaticallyReferencedJniMethods.sizeofIoUringBuf();
142 static final int IOURING_BUFFER_OFFSETOF_ADDR = NativeStaticallyReferencedJniMethods.ioUringBufferOffsetAddr();
143 static final int IOURING_BUFFER_OFFSETOF_LEN = NativeStaticallyReferencedJniMethods.ioUringBufferOffsetLen();
144 static final int IOURING_BUFFER_OFFSETOF_BID = NativeStaticallyReferencedJniMethods.ioUringBufferOffsetBid();
145
146
147
148
149 static final byte IORING_OP_NOP = 0;
150 static final byte IORING_OP_READV = 1;
151 static final byte IORING_OP_WRITEV = 2;
152 static final byte IORING_OP_FSYNC = 3;
153 static final byte IORING_OP_READ_FIXED = 4;
154 static final byte IORING_OP_WRITE_FIXED = 5;
155 static final byte IORING_OP_POLL_ADD = 6;
156 static final byte IORING_OP_POLL_REMOVE = 7;
157 static final byte IORING_OP_SYNC_FILE_RANGE = 8;
158 static final byte IORING_OP_SENDMSG = 9;
159 static final byte IORING_OP_RECVMSG = 10;
160 static final byte IORING_OP_TIMEOUT = 11;
161 static final byte IORING_OP_TIMEOUT_REMOVE = 12;
162 static final byte IORING_OP_ACCEPT = 13;
163 static final byte IORING_OP_ASYNC_CANCEL = 14;
164 static final byte IORING_OP_LINK_TIMEOUT = 15;
165 static final byte IORING_OP_CONNECT = 16;
166 static final byte IORING_OP_FALLOCATE = 17;
167 static final byte IORING_OP_OPENAT = 18;
168 static final byte IORING_OP_CLOSE = 19;
169 static final byte IORING_OP_FILES_UPDATE = 20;
170 static final byte IORING_OP_STATX = 21;
171 static final byte IORING_OP_READ = 22;
172 static final byte IORING_OP_WRITE = 23;
173 static final byte IORING_OP_FADVISE = 24;
174 static final byte IORING_OP_MADVISE = 25;
175 static final byte IORING_OP_SEND = 26;
176 static final byte IORING_OP_RECV = 27;
177 static final byte IORING_OP_OPENAT2 = 28;
178 static final byte IORING_OP_EPOLL_CTL = 29;
179 static final byte IORING_OP_SPLICE = 30;
180 static final byte IORING_OP_PROVIDE_BUFFERS = 31;
181 static final byte IORING_OP_REMOVE_BUFFERS = 32;
182 static final byte IORING_OP_TEE = 33;
183 static final byte IORING_OP_SHUTDOWN = 34;
184 static final byte IORING_OP_RENAMEAT = 35;
185 static final byte IORING_OP_UNLINKAT = 36;
186 static final byte IORING_OP_MKDIRAT = 37;
187 static final byte IORING_OP_SYMLINKAT = 38;
188 static final byte IORING_OP_LINKAT = 39;
189 static final byte IORING_OP_MSG_RING = 40;
190 static final byte IORING_OP_FSETXATTR = 41;
191 static final byte IORING_OP_SETXATTR = 42;
192 static final byte IORING_OP_FGETXATTR = 43;
193 static final byte IORING_OP_GETXATTR = 44;
194 static final byte IORING_OP_SOCKET = 45;
195 static final byte IORING_OP_URING_CMD = 46;
196 static final byte IORING_OP_SEND_ZC = 47;
197 static final byte IORING_OP_SENDMSG_ZC = 48;
198 static final byte IORING_OP_READ_MULTISHOT = 49;
199 static final byte IORING_OP_WAITID = 50;
200 static final byte IORING_OP_FUTEX_WAIT = 51;
201 static final byte IORING_OP_FUTEX_WAKE = 52;
202 static final byte IORING_OP_FUTEX_WAITV = 53;
203 static final byte IORING_OP_FIXED_FD_INSTALL = 54;
204 static final byte IORING_OP_FTRUNCATE = 55;
205 static final byte IORING_OP_BIND = 56;
206 static final byte IORING_CQE_F_BUFFER = 1 << 0;
207 static final byte IORING_CQE_F_MORE = 1 << 1;
208 static final byte IORING_CQE_F_SOCK_NONEMPTY = 1 << 2;
209 static final byte IORING_CQE_F_BUF_MORE = 1 << 4;
210
211 static final int IORING_SETUP_CQSIZE = 1 << 3;
212 static final int IORING_SETUP_CLAMP = 1 << 4;
213
214 static final int IORING_SETUP_R_DISABLED = 1 << 6;
215 static final int IORING_SETUP_SUBMIT_ALL = 1 << 7;
216 static final int IORING_SETUP_SINGLE_ISSUER = 1 << 12;
217 static final int IORING_SETUP_DEFER_TASKRUN = 1 << 13;
218 static final int IORING_CQE_BUFFER_SHIFT = 16;
219
220 static final short IORING_POLL_ADD_MULTI = 1 << 0;
221
222 static final short IORING_RECVSEND_POLL_FIRST = 1 << 0;
223 static final short IORING_RECVSEND_BUNDLE = 1 << 4;
224 static final short IORING_RECV_MULTISHOT = 1 << 1;
225
226 static final short IORING_ACCEPT_MULTISHOT = 1 << 0;
227 static final short IORING_ACCEPT_DONTWAIT = 1 << 1;
228 static final short IORING_ACCEPT_POLL_FIRST = 1 << 2;
229
230 static final int IORING_FEAT_SUBMIT_STABLE = 1 << 2;
231 static final int IORING_FEAT_RECVSEND_BUNDLE = 1 << 14;
232
233 static final int SPLICE_F_MOVE = 1;
234
235 static final int IOU_PBUF_RING_INC = 2;
236 static String opToStr(byte op) {
237 switch (op) {
238 case IORING_OP_NOP: return "NOP";
239 case IORING_OP_READV: return "READV";
240 case IORING_OP_WRITEV: return "WRITEV";
241 case IORING_OP_FSYNC: return "FSYNC";
242 case IORING_OP_READ_FIXED: return "READ_FIXED";
243 case IORING_OP_WRITE_FIXED: return "WRITE_FIXED";
244 case IORING_OP_POLL_ADD: return "POLL_ADD";
245 case IORING_OP_POLL_REMOVE: return "POLL_REMOVE";
246 case IORING_OP_SYNC_FILE_RANGE: return "SYNC_FILE_RANGE";
247 case IORING_OP_SENDMSG: return "SENDMSG";
248 case IORING_OP_RECVMSG: return "RECVMSG";
249 case IORING_OP_TIMEOUT: return "TIMEOUT";
250 case IORING_OP_TIMEOUT_REMOVE: return "TIMEOUT_REMOVE";
251 case IORING_OP_ACCEPT: return "ACCEPT";
252 case IORING_OP_ASYNC_CANCEL: return "ASYNC_CANCEL";
253 case IORING_OP_LINK_TIMEOUT: return "LINK_TIMEOUT";
254 case IORING_OP_CONNECT: return "CONNECT";
255 case IORING_OP_FALLOCATE: return "FALLOCATE";
256 case IORING_OP_OPENAT: return "OPENAT";
257 case IORING_OP_CLOSE: return "CLOSE";
258 case IORING_OP_FILES_UPDATE: return "FILES_UPDATE";
259 case IORING_OP_STATX: return "STATX";
260 case IORING_OP_READ: return "READ";
261 case IORING_OP_WRITE: return "WRITE";
262 case IORING_OP_FADVISE: return "FADVISE";
263 case IORING_OP_MADVISE: return "MADVISE";
264 case IORING_OP_SEND: return "SEND";
265 case IORING_OP_RECV: return "RECV";
266 case IORING_OP_OPENAT2: return "OPENAT2";
267 case IORING_OP_EPOLL_CTL: return "EPOLL_CTL";
268 case IORING_OP_SPLICE: return "SPLICE";
269 case IORING_OP_PROVIDE_BUFFERS: return "PROVIDE_BUFFERS";
270 case IORING_OP_REMOVE_BUFFERS: return "REMOVE_BUFFERS";
271 case IORING_OP_TEE: return "TEE";
272 case IORING_OP_SHUTDOWN: return "SHUTDOWN";
273 case IORING_OP_RENAMEAT: return "RENAMEAT";
274 case IORING_OP_UNLINKAT: return "UNLINKAT";
275 case IORING_OP_MKDIRAT: return "MKDIRAT";
276 case IORING_OP_SYMLINKAT: return "SYMLINKAT";
277 case IORING_OP_LINKAT: return "LINKAT";
278 default: return "[OP CODE " + op + ']';
279 }
280 }
281
282 static final int IORING_ENTER_GETEVENTS = NativeStaticallyReferencedJniMethods.ioringEnterGetevents();
283 static final int IORING_ENTER_REGISTERED_RING = 1 << 4;
284 static final int IOSQE_ASYNC = NativeStaticallyReferencedJniMethods.iosqeAsync();
285 static final int IOSQE_LINK = NativeStaticallyReferencedJniMethods.iosqeLink();
286 static final int IOSQE_IO_DRAIN = NativeStaticallyReferencedJniMethods.iosqeDrain();
287 static final int IOSQE_BUFFER_SELECT = NativeStaticallyReferencedJniMethods.iosqeBufferSelect();
288 static final int IOSQE_CQE_SKIP_SUCCESS = 1 << 6;
289 static final int MSG_DONTWAIT = NativeStaticallyReferencedJniMethods.msgDontwait();
290 static final int MSG_FASTOPEN = NativeStaticallyReferencedJniMethods.msgFastopen();
291 static final int SOL_UDP = NativeStaticallyReferencedJniMethods.solUdp();
292 static final int UDP_SEGMENT = NativeStaticallyReferencedJniMethods.udpSegment();
293 private static final int TFO_ENABLED_CLIENT_MASK = 0x1;
294 private static final int TFO_ENABLED_SERVER_MASK = 0x2;
295 private static final int TCP_FASTOPEN_MODE = NativeStaticallyReferencedJniMethods.tcpFastopenMode();
296
297
298
299
300 static final boolean IS_SUPPORTING_TCP_FASTOPEN_CLIENT =
301 (TCP_FASTOPEN_MODE & TFO_ENABLED_CLIENT_MASK) == TFO_ENABLED_CLIENT_MASK;
302
303
304
305
306 static final boolean IS_SUPPORTING_TCP_FASTOPEN_SERVER =
307 (TCP_FASTOPEN_MODE & TFO_ENABLED_SERVER_MASK) == TFO_ENABLED_SERVER_MASK;
308
309 private static final int[] REQUIRED_IORING_OPS = {
310 IORING_OP_POLL_ADD,
311 IORING_OP_TIMEOUT,
312 IORING_OP_ACCEPT,
313 IORING_OP_READ,
314 IORING_OP_WRITE,
315 IORING_OP_POLL_REMOVE,
316 IORING_OP_CONNECT,
317 IORING_OP_CLOSE,
318 IORING_OP_WRITEV,
319 IORING_OP_SENDMSG,
320 IORING_OP_RECVMSG,
321 IORING_OP_ASYNC_CANCEL,
322 IORING_OP_RECV,
323 IORING_OP_NOP,
324 IORING_OP_SHUTDOWN,
325 IORING_OP_SEND
326 };
327
328 static int setupFlags() {
329 int flags = Native.IORING_SETUP_R_DISABLED | Native.IORING_SETUP_CLAMP;
330 if (IoUring.isSetupSubmitAllSupported()) {
331 flags |= Native.IORING_SETUP_SUBMIT_ALL;
332 }
333
334
335 if (IoUring.isSetupSingleIssuerSupported()) {
336 flags |= Native.IORING_SETUP_SINGLE_ISSUER;
337 }
338 if (IoUring.isSetupDeferTaskrunSupported()) {
339 flags |= Native.IORING_SETUP_DEFER_TASKRUN;
340 }
341 return flags;
342 }
343
344 static RingBuffer createRingBuffer(int ringSize, int setupFlags) {
345 return createRingBuffer(ringSize, ringSize * 2, setupFlags);
346 }
347
348 static RingBuffer createRingBuffer(int ringSize, int cqeSize, int setupFlags) {
349 ObjectUtil.checkPositive(ringSize, "ringSize");
350 ObjectUtil.checkPositive(cqeSize, "cqeSize");
351 long[] values = ioUringSetup(ringSize, cqeSize, setupFlags);
352 assert values.length == 18;
353 long cqkhead = values[0];
354 long cqktail = values[1];
355 int cqringMask = (int) values[2];
356 int cqringEntries = (int) values[3];
357 long cqArrayAddress = values[4];
358 int cqringSize = (int) values[5];
359 long cqringAddress = values[6];
360 int cqringFd = (int) values[7];
361 int cqringCapacity = (int) values[8];
362 CompletionQueue completionQueue = new CompletionQueue(
363 Buffer.wrapMemoryAddressWithNativeOrder(cqkhead, Integer.BYTES),
364 Buffer.wrapMemoryAddressWithNativeOrder(cqktail, Integer.BYTES),
365 cqringMask,
366 cqringEntries,
367 Buffer.wrapMemoryAddressWithNativeOrder(cqArrayAddress, cqringEntries * CompletionQueue.CQE_SIZE),
368 cqringSize,
369 cqringAddress,
370 cqringFd,
371 cqringCapacity);
372
373 long sqkhead = values[9];
374 long sqktail = values[10];
375 int sqringMask = (int) values[11];
376 int sqringEntries = (int) values[12];
377 long sqArrayAddress = values[13];
378 int sqringSize = (int) values[14];
379 long sqringAddress = values[15];
380 int sqringFd = (int) values[16];
381 SubmissionQueue submissionQueue = new SubmissionQueue(
382 Buffer.wrapMemoryAddressWithNativeOrder(sqkhead, Integer.BYTES),
383 Buffer.wrapMemoryAddressWithNativeOrder(sqktail, Integer.BYTES),
384 sqringMask,
385 sqringEntries,
386 Buffer.wrapMemoryAddressWithNativeOrder(sqArrayAddress, sqringEntries * SubmissionQueue.SQE_SIZE),
387 sqringSize,
388 sqringAddress,
389 sqringFd);
390 return new RingBuffer(submissionQueue, completionQueue, (int) values[17]);
391 }
392
393 static void checkAllIOSupported(int ringFd) {
394 if (!ioUringProbe(ringFd, REQUIRED_IORING_OPS)) {
395 throw new UnsupportedOperationException("Not all operations are supported: "
396 + Arrays.toString(REQUIRED_IORING_OPS));
397 }
398 }
399
400 static boolean isRecvMultishotSupported() {
401
402 return Native.ioUringSetupSupportsFlags(Native.IORING_SETUP_SINGLE_ISSUER);
403 }
404
405 static boolean isAcceptMultishotSupported(int ringFd) {
406
407 return ioUringProbe(ringFd, new int[] { Native.IORING_OP_SOCKET });
408 }
409
410 static boolean isCqeFSockNonEmptySupported(int ringFd) {
411
412 return ioUringProbe(ringFd, new int[] { Native.IORING_OP_SOCKET });
413 }
414
415 static boolean isSpliceSupported(int ringFd) {
416
417 return ioUringProbe(ringFd, new int[] { Native.IORING_OP_SPLICE });
418 }
419
420 static boolean isPollAddMultiShotSupported(int ringfd) {
421
422 return isCqeFSockNonEmptySupported(ringfd);
423 }
424
425
426
427
428
429
430 static boolean isRegisterIoWqWorkerSupported(int ringFd) {
431
432 int result = ioUringRegisterIoWqMaxWorkers(ringFd, 0, 0);
433 if (result >= 0) {
434 return true;
435 }
436
437 return false;
438 }
439
440 static boolean isRegisterBufferRingSupported(int ringFd, int flags) {
441 int entries = 2;
442 short bgid = 1;
443 long result = ioUringRegisterBufRing(ringFd, entries, bgid, flags);
444 if (result >= 0) {
445 ioUringUnRegisterBufRing(ringFd, result, entries, bgid);
446 return true;
447 }
448
449 return false;
450 }
451
452 static void checkKernelVersion(String kernelVersion) {
453 boolean enforceKernelVersion = SystemPropertyUtil.getBoolean(
454 "io.netty.transport.iouring.enforceKernelVersion", true);
455 boolean kernelSupported = checkKernelVersion(kernelVersion, 5, 9);
456 if (!kernelSupported) {
457 if (enforceKernelVersion) {
458 throw new UnsupportedOperationException(
459 "you need at least kernel version 5.9, current kernel version: " + kernelVersion);
460 } else {
461 logger.debug("Detected kernel " + kernelVersion + " does not match minimum version of 5.9, " +
462 "trying to use io_uring anyway");
463 }
464 }
465 }
466
467 private static boolean checkKernelVersion(String kernelVersion, int major, int minor) {
468 String[] versionComponents = kernelVersion.split("\\.");
469 if (versionComponents.length < 3) {
470 return false;
471 }
472 int nativeMajor;
473 try {
474 nativeMajor = Integer.parseInt(versionComponents[0]);
475 } catch (NumberFormatException e) {
476 return false;
477 }
478
479 if (nativeMajor < major) {
480 return false;
481 }
482
483 if (nativeMajor > major) {
484 return true;
485 }
486
487 int nativeMinor;
488 try {
489 nativeMinor = Integer.parseInt(versionComponents[1]);
490 } catch (NumberFormatException e) {
491 return false;
492 }
493
494 return nativeMinor >= minor;
495 }
496
497 static native boolean ioUringSetupSupportsFlags(int setupFlags);
498 private static native boolean ioUringProbe(int ringFd, int[] ios);
499 private static native long[] ioUringSetup(int entries, int cqeSize, int setupFlags);
500
501 static native int ioUringRegisterIoWqMaxWorkers(int ringFd, int maxBoundedValue, int maxUnboundedValue);
502 static native int ioUringRegisterEnableRings(int ringFd);
503 static native int ioUringRegisterRingFds(int ringFds);
504
505 static native long ioUringRegisterBufRing(int ringFd, int entries, short bufferGroup, int flags);
506 static native int ioUringUnRegisterBufRing(int ringFd, long ioUringBufRingAddr, int entries, short bufferGroupId);
507 static native int ioUringBufRingSize(int entries);
508 static native int ioUringEnter(int ringFd, int toSubmit, int minComplete, int flags);
509
510 static native void eventFdWrite(int fd, long value);
511
512 static int getFd(DefaultFileRegion fileChannel) {
513 return getFd0(fileChannel);
514 }
515
516 private static native int getFd0(Object fileChannel);
517
518 static FileDescriptor newBlockingEventFd() {
519 return new FileDescriptor(blockingEventFd());
520 }
521
522 static native void ioUringExit(long submissionQueueArrayAddress, int submissionQueueRingEntries,
523 long submissionQueueRingAddress, int submissionQueueRingSize,
524 long completionQueueRingAddress, int completionQueueRingSize,
525 int ringFd, int enterRingFd);
526
527 private static native int blockingEventFd();
528
529
530 static native int createFile(String name);
531
532 private static native int registerUnix();
533
534 static native long cmsghdrData(long hdrAddr);
535
536 static native String kernelVersion();
537
538 private Native() {
539
540 }
541
542
543 private static void loadNativeLibrary() {
544 String name = PlatformDependent.normalizedOs().toLowerCase(Locale.ROOT).trim();
545 if (!name.startsWith("linux")) {
546 throw new IllegalStateException("Only supported on Linux");
547 }
548 String staticLibName = "netty_transport_native_io_uring42";
549 String sharedLibName = staticLibName + '_' + PlatformDependent.normalizedArch();
550 ClassLoader cl = PlatformDependent.getClassLoader(Native.class);
551 try {
552 NativeLibraryLoader.load(sharedLibName, cl);
553 } catch (UnsatisfiedLinkError e1) {
554 try {
555 NativeLibraryLoader.load(staticLibName, cl);
556 logger.info("Failed to load io_uring");
557 } catch (UnsatisfiedLinkError e2) {
558 ThrowableUtil.addSuppressed(e1, e2);
559 throw e1;
560 }
561 }
562 }
563 }