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f9ead18c JA |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/kernel.h> | |
3 | #include <linux/errno.h> | |
4 | #include <linux/file.h> | |
5 | #include <linux/slab.h> | |
6 | #include <linux/net.h> | |
7 | #include <linux/compat.h> | |
8 | #include <net/compat.h> | |
9 | #include <linux/io_uring.h> | |
10 | ||
11 | #include <uapi/linux/io_uring.h> | |
12 | ||
f9ead18c | 13 | #include "io_uring.h" |
3b77495a | 14 | #include "kbuf.h" |
43e0bbbd | 15 | #include "alloc_cache.h" |
f9ead18c | 16 | #include "net.h" |
06a5464b | 17 | #include "notif.h" |
10c7d33e | 18 | #include "rsrc.h" |
f9ead18c JA |
19 | |
20 | #if defined(CONFIG_NET) | |
21 | struct io_shutdown { | |
22 | struct file *file; | |
23 | int how; | |
24 | }; | |
25 | ||
26 | struct io_accept { | |
27 | struct file *file; | |
28 | struct sockaddr __user *addr; | |
29 | int __user *addr_len; | |
30 | int flags; | |
31 | u32 file_slot; | |
32 | unsigned long nofile; | |
33 | }; | |
34 | ||
35 | struct io_socket { | |
36 | struct file *file; | |
37 | int domain; | |
38 | int type; | |
39 | int protocol; | |
40 | int flags; | |
41 | u32 file_slot; | |
42 | unsigned long nofile; | |
43 | }; | |
44 | ||
45 | struct io_connect { | |
46 | struct file *file; | |
47 | struct sockaddr __user *addr; | |
48 | int addr_len; | |
3fb1bd68 | 49 | bool in_progress; |
f9ead18c JA |
50 | }; |
51 | ||
52 | struct io_sr_msg { | |
53 | struct file *file; | |
54 | union { | |
55 | struct compat_msghdr __user *umsg_compat; | |
56 | struct user_msghdr __user *umsg; | |
57 | void __user *buf; | |
58 | }; | |
0b048557 PB |
59 | unsigned len; |
60 | unsigned done_io; | |
293402e5 | 61 | unsigned msg_flags; |
0b048557 | 62 | u16 flags; |
516e82f0 | 63 | /* initialised and used only by !msg send variants */ |
0b048557 | 64 | u16 addr_len; |
092aeedb | 65 | void __user *addr; |
516e82f0 | 66 | /* used only for send zerocopy */ |
b48c312b | 67 | struct io_kiocb *notif; |
06a5464b PB |
68 | }; |
69 | ||
17add5ce PB |
70 | static inline bool io_check_multishot(struct io_kiocb *req, |
71 | unsigned int issue_flags) | |
72 | { | |
73 | /* | |
74 | * When ->locked_cq is set we only allow to post CQEs from the original | |
75 | * task context. Usual request completions will be handled in other | |
76 | * generic paths but multipoll may decide to post extra cqes. | |
77 | */ | |
78 | return !(issue_flags & IO_URING_F_IOWQ) || | |
79 | !(issue_flags & IO_URING_F_MULTISHOT) || | |
80 | !req->ctx->task_complete; | |
81 | } | |
82 | ||
f9ead18c JA |
83 | int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
84 | { | |
f2ccb5ae | 85 | struct io_shutdown *shutdown = io_kiocb_to_cmd(req, struct io_shutdown); |
f9ead18c JA |
86 | |
87 | if (unlikely(sqe->off || sqe->addr || sqe->rw_flags || | |
88 | sqe->buf_index || sqe->splice_fd_in)) | |
89 | return -EINVAL; | |
90 | ||
91 | shutdown->how = READ_ONCE(sqe->len); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | int io_shutdown(struct io_kiocb *req, unsigned int issue_flags) | |
96 | { | |
f2ccb5ae | 97 | struct io_shutdown *shutdown = io_kiocb_to_cmd(req, struct io_shutdown); |
f9ead18c JA |
98 | struct socket *sock; |
99 | int ret; | |
100 | ||
101 | if (issue_flags & IO_URING_F_NONBLOCK) | |
102 | return -EAGAIN; | |
103 | ||
104 | sock = sock_from_file(req->file); | |
105 | if (unlikely(!sock)) | |
106 | return -ENOTSOCK; | |
107 | ||
108 | ret = __sys_shutdown_sock(sock, shutdown->how); | |
109 | io_req_set_res(req, ret, 0); | |
110 | return IOU_OK; | |
111 | } | |
112 | ||
113 | static bool io_net_retry(struct socket *sock, int flags) | |
114 | { | |
115 | if (!(flags & MSG_WAITALL)) | |
116 | return false; | |
117 | return sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET; | |
118 | } | |
119 | ||
43e0bbbd JA |
120 | static void io_netmsg_recycle(struct io_kiocb *req, unsigned int issue_flags) |
121 | { | |
122 | struct io_async_msghdr *hdr = req->async_data; | |
123 | ||
06360426 | 124 | if (!req_has_async_data(req) || issue_flags & IO_URING_F_UNLOCKED) |
43e0bbbd JA |
125 | return; |
126 | ||
127 | /* Let normal cleanup path reap it if we fail adding to the cache */ | |
128 | if (io_alloc_cache_put(&req->ctx->netmsg_cache, &hdr->cache)) { | |
129 | req->async_data = NULL; | |
130 | req->flags &= ~REQ_F_ASYNC_DATA; | |
131 | } | |
132 | } | |
133 | ||
858c293e PB |
134 | static struct io_async_msghdr *io_msg_alloc_async(struct io_kiocb *req, |
135 | unsigned int issue_flags) | |
43e0bbbd JA |
136 | { |
137 | struct io_ring_ctx *ctx = req->ctx; | |
138 | struct io_cache_entry *entry; | |
4c17a496 | 139 | struct io_async_msghdr *hdr; |
43e0bbbd | 140 | |
df730ec2 XL |
141 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { |
142 | entry = io_alloc_cache_get(&ctx->netmsg_cache); | |
143 | if (entry) { | |
144 | hdr = container_of(entry, struct io_async_msghdr, cache); | |
145 | hdr->free_iov = NULL; | |
146 | req->flags |= REQ_F_ASYNC_DATA; | |
147 | req->async_data = hdr; | |
148 | return hdr; | |
149 | } | |
43e0bbbd JA |
150 | } |
151 | ||
4c17a496 PB |
152 | if (!io_alloc_async_data(req)) { |
153 | hdr = req->async_data; | |
154 | hdr->free_iov = NULL; | |
155 | return hdr; | |
156 | } | |
43e0bbbd JA |
157 | return NULL; |
158 | } | |
159 | ||
858c293e PB |
160 | static inline struct io_async_msghdr *io_msg_alloc_async_prep(struct io_kiocb *req) |
161 | { | |
162 | /* ->prep_async is always called from the submission context */ | |
163 | return io_msg_alloc_async(req, 0); | |
164 | } | |
165 | ||
f9ead18c | 166 | static int io_setup_async_msg(struct io_kiocb *req, |
43e0bbbd JA |
167 | struct io_async_msghdr *kmsg, |
168 | unsigned int issue_flags) | |
f9ead18c | 169 | { |
3f743e9b | 170 | struct io_async_msghdr *async_msg; |
f9ead18c | 171 | |
3f743e9b | 172 | if (req_has_async_data(req)) |
f9ead18c | 173 | return -EAGAIN; |
858c293e | 174 | async_msg = io_msg_alloc_async(req, issue_flags); |
43e0bbbd | 175 | if (!async_msg) { |
f9ead18c JA |
176 | kfree(kmsg->free_iov); |
177 | return -ENOMEM; | |
178 | } | |
f9ead18c JA |
179 | req->flags |= REQ_F_NEED_CLEANUP; |
180 | memcpy(async_msg, kmsg, sizeof(*kmsg)); | |
6f10ae8a PB |
181 | if (async_msg->msg.msg_name) |
182 | async_msg->msg.msg_name = &async_msg->addr; | |
f9ead18c | 183 | /* if were using fast_iov, set it to the new one */ |
3e4cb6eb SM |
184 | if (!kmsg->free_iov) { |
185 | size_t fast_idx = kmsg->msg.msg_iter.iov - kmsg->fast_iov; | |
186 | async_msg->msg.msg_iter.iov = &async_msg->fast_iov[fast_idx]; | |
187 | } | |
f9ead18c JA |
188 | |
189 | return -EAGAIN; | |
190 | } | |
191 | ||
192 | static int io_sendmsg_copy_hdr(struct io_kiocb *req, | |
193 | struct io_async_msghdr *iomsg) | |
194 | { | |
f2ccb5ae | 195 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
196 | |
197 | iomsg->msg.msg_name = &iomsg->addr; | |
198 | iomsg->free_iov = iomsg->fast_iov; | |
199 | return sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags, | |
200 | &iomsg->free_iov); | |
201 | } | |
202 | ||
516e82f0 | 203 | int io_send_prep_async(struct io_kiocb *req) |
581711c4 | 204 | { |
ac9e5784 | 205 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
581711c4 PB |
206 | struct io_async_msghdr *io; |
207 | int ret; | |
208 | ||
209 | if (!zc->addr || req_has_async_data(req)) | |
210 | return 0; | |
6bf8ad25 PB |
211 | io = io_msg_alloc_async_prep(req); |
212 | if (!io) | |
581711c4 | 213 | return -ENOMEM; |
581711c4 PB |
214 | ret = move_addr_to_kernel(zc->addr, zc->addr_len, &io->addr); |
215 | return ret; | |
216 | } | |
217 | ||
218 | static int io_setup_async_addr(struct io_kiocb *req, | |
6ae61b7a | 219 | struct sockaddr_storage *addr_storage, |
581711c4 PB |
220 | unsigned int issue_flags) |
221 | { | |
6ae61b7a | 222 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
581711c4 PB |
223 | struct io_async_msghdr *io; |
224 | ||
6ae61b7a | 225 | if (!sr->addr || req_has_async_data(req)) |
581711c4 | 226 | return -EAGAIN; |
6bf8ad25 PB |
227 | io = io_msg_alloc_async(req, issue_flags); |
228 | if (!io) | |
581711c4 | 229 | return -ENOMEM; |
6ae61b7a | 230 | memcpy(&io->addr, addr_storage, sizeof(io->addr)); |
581711c4 PB |
231 | return -EAGAIN; |
232 | } | |
233 | ||
f9ead18c JA |
234 | int io_sendmsg_prep_async(struct io_kiocb *req) |
235 | { | |
236 | int ret; | |
237 | ||
858c293e PB |
238 | if (!io_msg_alloc_async_prep(req)) |
239 | return -ENOMEM; | |
f9ead18c JA |
240 | ret = io_sendmsg_copy_hdr(req, req->async_data); |
241 | if (!ret) | |
242 | req->flags |= REQ_F_NEED_CLEANUP; | |
243 | return ret; | |
244 | } | |
245 | ||
246 | void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req) | |
247 | { | |
248 | struct io_async_msghdr *io = req->async_data; | |
249 | ||
250 | kfree(io->free_iov); | |
251 | } | |
252 | ||
253 | int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
254 | { | |
f2ccb5ae | 255 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c | 256 | |
516e82f0 PB |
257 | if (req->opcode == IORING_OP_SEND) { |
258 | if (READ_ONCE(sqe->__pad3[0])) | |
259 | return -EINVAL; | |
260 | sr->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
261 | sr->addr_len = READ_ONCE(sqe->addr_len); | |
262 | } else if (sqe->addr2 || sqe->file_index) { | |
f9ead18c | 263 | return -EINVAL; |
516e82f0 | 264 | } |
f9ead18c JA |
265 | |
266 | sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
267 | sr->len = READ_ONCE(sqe->len); | |
268 | sr->flags = READ_ONCE(sqe->ioprio); | |
269 | if (sr->flags & ~IORING_RECVSEND_POLL_FIRST) | |
270 | return -EINVAL; | |
271 | sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
272 | if (sr->msg_flags & MSG_DONTWAIT) | |
273 | req->flags |= REQ_F_NOWAIT; | |
274 | ||
275 | #ifdef CONFIG_COMPAT | |
276 | if (req->ctx->compat) | |
277 | sr->msg_flags |= MSG_CMSG_COMPAT; | |
278 | #endif | |
279 | sr->done_io = 0; | |
280 | return 0; | |
281 | } | |
282 | ||
283 | int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags) | |
284 | { | |
f2ccb5ae | 285 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
286 | struct io_async_msghdr iomsg, *kmsg; |
287 | struct socket *sock; | |
288 | unsigned flags; | |
289 | int min_ret = 0; | |
290 | int ret; | |
291 | ||
292 | sock = sock_from_file(req->file); | |
293 | if (unlikely(!sock)) | |
294 | return -ENOTSOCK; | |
295 | ||
296 | if (req_has_async_data(req)) { | |
297 | kmsg = req->async_data; | |
298 | } else { | |
299 | ret = io_sendmsg_copy_hdr(req, &iomsg); | |
300 | if (ret) | |
301 | return ret; | |
302 | kmsg = &iomsg; | |
303 | } | |
304 | ||
305 | if (!(req->flags & REQ_F_POLLED) && | |
306 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
43e0bbbd | 307 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c JA |
308 | |
309 | flags = sr->msg_flags; | |
310 | if (issue_flags & IO_URING_F_NONBLOCK) | |
311 | flags |= MSG_DONTWAIT; | |
312 | if (flags & MSG_WAITALL) | |
313 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
314 | ||
315 | ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); | |
316 | ||
317 | if (ret < min_ret) { | |
318 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
43e0bbbd | 319 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c JA |
320 | if (ret > 0 && io_net_retry(sock, flags)) { |
321 | sr->done_io += ret; | |
322 | req->flags |= REQ_F_PARTIAL_IO; | |
43e0bbbd | 323 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 324 | } |
95eafc74 PB |
325 | if (ret == -ERESTARTSYS) |
326 | ret = -EINTR; | |
f9ead18c JA |
327 | req_set_fail(req); |
328 | } | |
329 | /* fast path, check for non-NULL to avoid function call */ | |
330 | if (kmsg->free_iov) | |
331 | kfree(kmsg->free_iov); | |
332 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
43e0bbbd | 333 | io_netmsg_recycle(req, issue_flags); |
f9ead18c JA |
334 | if (ret >= 0) |
335 | ret += sr->done_io; | |
336 | else if (sr->done_io) | |
337 | ret = sr->done_io; | |
338 | io_req_set_res(req, ret, 0); | |
339 | return IOU_OK; | |
340 | } | |
341 | ||
342 | int io_send(struct io_kiocb *req, unsigned int issue_flags) | |
343 | { | |
516e82f0 | 344 | struct sockaddr_storage __address; |
f2ccb5ae | 345 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
346 | struct msghdr msg; |
347 | struct iovec iov; | |
348 | struct socket *sock; | |
349 | unsigned flags; | |
350 | int min_ret = 0; | |
351 | int ret; | |
352 | ||
04360d3e PB |
353 | msg.msg_name = NULL; |
354 | msg.msg_control = NULL; | |
355 | msg.msg_controllen = 0; | |
356 | msg.msg_namelen = 0; | |
357 | msg.msg_ubuf = NULL; | |
358 | ||
516e82f0 PB |
359 | if (sr->addr) { |
360 | if (req_has_async_data(req)) { | |
361 | struct io_async_msghdr *io = req->async_data; | |
362 | ||
363 | msg.msg_name = &io->addr; | |
364 | } else { | |
365 | ret = move_addr_to_kernel(sr->addr, sr->addr_len, &__address); | |
366 | if (unlikely(ret < 0)) | |
367 | return ret; | |
368 | msg.msg_name = (struct sockaddr *)&__address; | |
369 | } | |
370 | msg.msg_namelen = sr->addr_len; | |
371 | } | |
372 | ||
f9ead18c JA |
373 | if (!(req->flags & REQ_F_POLLED) && |
374 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
516e82f0 | 375 | return io_setup_async_addr(req, &__address, issue_flags); |
f9ead18c JA |
376 | |
377 | sock = sock_from_file(req->file); | |
378 | if (unlikely(!sock)) | |
379 | return -ENOTSOCK; | |
380 | ||
de4eda9d | 381 | ret = import_single_range(ITER_SOURCE, sr->buf, sr->len, &iov, &msg.msg_iter); |
f9ead18c JA |
382 | if (unlikely(ret)) |
383 | return ret; | |
384 | ||
f9ead18c JA |
385 | flags = sr->msg_flags; |
386 | if (issue_flags & IO_URING_F_NONBLOCK) | |
387 | flags |= MSG_DONTWAIT; | |
388 | if (flags & MSG_WAITALL) | |
389 | min_ret = iov_iter_count(&msg.msg_iter); | |
390 | ||
391 | msg.msg_flags = flags; | |
392 | ret = sock_sendmsg(sock, &msg); | |
393 | if (ret < min_ret) { | |
394 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
516e82f0 PB |
395 | return io_setup_async_addr(req, &__address, issue_flags); |
396 | ||
f9ead18c JA |
397 | if (ret > 0 && io_net_retry(sock, flags)) { |
398 | sr->len -= ret; | |
399 | sr->buf += ret; | |
400 | sr->done_io += ret; | |
401 | req->flags |= REQ_F_PARTIAL_IO; | |
516e82f0 | 402 | return io_setup_async_addr(req, &__address, issue_flags); |
f9ead18c | 403 | } |
95eafc74 PB |
404 | if (ret == -ERESTARTSYS) |
405 | ret = -EINTR; | |
f9ead18c JA |
406 | req_set_fail(req); |
407 | } | |
408 | if (ret >= 0) | |
409 | ret += sr->done_io; | |
410 | else if (sr->done_io) | |
411 | ret = sr->done_io; | |
412 | io_req_set_res(req, ret, 0); | |
413 | return IOU_OK; | |
414 | } | |
415 | ||
9bb66906 DY |
416 | static bool io_recvmsg_multishot_overflow(struct io_async_msghdr *iomsg) |
417 | { | |
9b0fc3c0 | 418 | int hdr; |
9bb66906 | 419 | |
9b0fc3c0 | 420 | if (iomsg->namelen < 0) |
9bb66906 | 421 | return true; |
9b0fc3c0 DY |
422 | if (check_add_overflow((int)sizeof(struct io_uring_recvmsg_out), |
423 | iomsg->namelen, &hdr)) | |
9bb66906 | 424 | return true; |
9b0fc3c0 | 425 | if (check_add_overflow(hdr, (int)iomsg->controllen, &hdr)) |
9bb66906 DY |
426 | return true; |
427 | ||
428 | return false; | |
429 | } | |
430 | ||
f9ead18c JA |
431 | static int __io_recvmsg_copy_hdr(struct io_kiocb *req, |
432 | struct io_async_msghdr *iomsg) | |
433 | { | |
f2ccb5ae | 434 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
7fa875b8 | 435 | struct user_msghdr msg; |
f9ead18c JA |
436 | int ret; |
437 | ||
7fa875b8 DY |
438 | if (copy_from_user(&msg, sr->umsg, sizeof(*sr->umsg))) |
439 | return -EFAULT; | |
440 | ||
441 | ret = __copy_msghdr(&iomsg->msg, &msg, &iomsg->uaddr); | |
f9ead18c JA |
442 | if (ret) |
443 | return ret; | |
444 | ||
445 | if (req->flags & REQ_F_BUFFER_SELECT) { | |
7fa875b8 | 446 | if (msg.msg_iovlen == 0) { |
5702196e DY |
447 | sr->len = iomsg->fast_iov[0].iov_len = 0; |
448 | iomsg->fast_iov[0].iov_base = NULL; | |
449 | iomsg->free_iov = NULL; | |
7fa875b8 | 450 | } else if (msg.msg_iovlen > 1) { |
f9ead18c | 451 | return -EINVAL; |
5702196e | 452 | } else { |
7fa875b8 | 453 | if (copy_from_user(iomsg->fast_iov, msg.msg_iov, sizeof(*msg.msg_iov))) |
5702196e DY |
454 | return -EFAULT; |
455 | sr->len = iomsg->fast_iov[0].iov_len; | |
456 | iomsg->free_iov = NULL; | |
457 | } | |
9bb66906 DY |
458 | |
459 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
460 | iomsg->namelen = msg.msg_namelen; | |
461 | iomsg->controllen = msg.msg_controllen; | |
462 | if (io_recvmsg_multishot_overflow(iomsg)) | |
463 | return -EOVERFLOW; | |
464 | } | |
f9ead18c JA |
465 | } else { |
466 | iomsg->free_iov = iomsg->fast_iov; | |
de4eda9d | 467 | ret = __import_iovec(ITER_DEST, msg.msg_iov, msg.msg_iovlen, UIO_FASTIOV, |
f9ead18c JA |
468 | &iomsg->free_iov, &iomsg->msg.msg_iter, |
469 | false); | |
470 | if (ret > 0) | |
471 | ret = 0; | |
472 | } | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
477 | #ifdef CONFIG_COMPAT | |
478 | static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req, | |
479 | struct io_async_msghdr *iomsg) | |
480 | { | |
f2ccb5ae | 481 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
72c531f8 | 482 | struct compat_msghdr msg; |
f9ead18c | 483 | struct compat_iovec __user *uiov; |
f9ead18c JA |
484 | int ret; |
485 | ||
72c531f8 DY |
486 | if (copy_from_user(&msg, sr->umsg_compat, sizeof(msg))) |
487 | return -EFAULT; | |
488 | ||
4f6a94d3 | 489 | ret = __get_compat_msghdr(&iomsg->msg, &msg, &iomsg->uaddr); |
f9ead18c JA |
490 | if (ret) |
491 | return ret; | |
492 | ||
72c531f8 | 493 | uiov = compat_ptr(msg.msg_iov); |
f9ead18c JA |
494 | if (req->flags & REQ_F_BUFFER_SELECT) { |
495 | compat_ssize_t clen; | |
496 | ||
990a4de5 | 497 | iomsg->free_iov = NULL; |
72c531f8 | 498 | if (msg.msg_iovlen == 0) { |
6d2f75a0 | 499 | sr->len = 0; |
72c531f8 | 500 | } else if (msg.msg_iovlen > 1) { |
f9ead18c | 501 | return -EINVAL; |
6d2f75a0 DY |
502 | } else { |
503 | if (!access_ok(uiov, sizeof(*uiov))) | |
504 | return -EFAULT; | |
505 | if (__get_user(clen, &uiov->iov_len)) | |
506 | return -EFAULT; | |
507 | if (clen < 0) | |
508 | return -EINVAL; | |
509 | sr->len = clen; | |
6d2f75a0 | 510 | } |
9bb66906 DY |
511 | |
512 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
513 | iomsg->namelen = msg.msg_namelen; | |
514 | iomsg->controllen = msg.msg_controllen; | |
515 | if (io_recvmsg_multishot_overflow(iomsg)) | |
516 | return -EOVERFLOW; | |
517 | } | |
f9ead18c JA |
518 | } else { |
519 | iomsg->free_iov = iomsg->fast_iov; | |
de4eda9d | 520 | ret = __import_iovec(ITER_DEST, (struct iovec __user *)uiov, msg.msg_iovlen, |
f9ead18c JA |
521 | UIO_FASTIOV, &iomsg->free_iov, |
522 | &iomsg->msg.msg_iter, true); | |
523 | if (ret < 0) | |
524 | return ret; | |
525 | } | |
526 | ||
527 | return 0; | |
528 | } | |
529 | #endif | |
530 | ||
531 | static int io_recvmsg_copy_hdr(struct io_kiocb *req, | |
532 | struct io_async_msghdr *iomsg) | |
533 | { | |
534 | iomsg->msg.msg_name = &iomsg->addr; | |
535 | ||
536 | #ifdef CONFIG_COMPAT | |
537 | if (req->ctx->compat) | |
538 | return __io_compat_recvmsg_copy_hdr(req, iomsg); | |
539 | #endif | |
540 | ||
541 | return __io_recvmsg_copy_hdr(req, iomsg); | |
542 | } | |
543 | ||
544 | int io_recvmsg_prep_async(struct io_kiocb *req) | |
545 | { | |
546 | int ret; | |
547 | ||
858c293e PB |
548 | if (!io_msg_alloc_async_prep(req)) |
549 | return -ENOMEM; | |
f9ead18c JA |
550 | ret = io_recvmsg_copy_hdr(req, req->async_data); |
551 | if (!ret) | |
552 | req->flags |= REQ_F_NEED_CLEANUP; | |
553 | return ret; | |
554 | } | |
555 | ||
b3fdea6e DY |
556 | #define RECVMSG_FLAGS (IORING_RECVSEND_POLL_FIRST | IORING_RECV_MULTISHOT) |
557 | ||
f9ead18c JA |
558 | int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
559 | { | |
f2ccb5ae | 560 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
561 | |
562 | if (unlikely(sqe->file_index || sqe->addr2)) | |
563 | return -EINVAL; | |
564 | ||
565 | sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
566 | sr->len = READ_ONCE(sqe->len); | |
567 | sr->flags = READ_ONCE(sqe->ioprio); | |
b3fdea6e | 568 | if (sr->flags & ~(RECVMSG_FLAGS)) |
f9ead18c JA |
569 | return -EINVAL; |
570 | sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
571 | if (sr->msg_flags & MSG_DONTWAIT) | |
572 | req->flags |= REQ_F_NOWAIT; | |
573 | if (sr->msg_flags & MSG_ERRQUEUE) | |
574 | req->flags |= REQ_F_CLEAR_POLLIN; | |
b3fdea6e DY |
575 | if (sr->flags & IORING_RECV_MULTISHOT) { |
576 | if (!(req->flags & REQ_F_BUFFER_SELECT)) | |
577 | return -EINVAL; | |
578 | if (sr->msg_flags & MSG_WAITALL) | |
579 | return -EINVAL; | |
580 | if (req->opcode == IORING_OP_RECV && sr->len) | |
581 | return -EINVAL; | |
582 | req->flags |= REQ_F_APOLL_MULTISHOT; | |
583 | } | |
f9ead18c JA |
584 | |
585 | #ifdef CONFIG_COMPAT | |
586 | if (req->ctx->compat) | |
587 | sr->msg_flags |= MSG_CMSG_COMPAT; | |
588 | #endif | |
589 | sr->done_io = 0; | |
590 | return 0; | |
591 | } | |
592 | ||
b3fdea6e DY |
593 | static inline void io_recv_prep_retry(struct io_kiocb *req) |
594 | { | |
f2ccb5ae | 595 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
b3fdea6e DY |
596 | |
597 | sr->done_io = 0; | |
598 | sr->len = 0; /* get from the provided buffer */ | |
599 | } | |
600 | ||
601 | /* | |
9bb66906 | 602 | * Finishes io_recv and io_recvmsg. |
b3fdea6e DY |
603 | * |
604 | * Returns true if it is actually finished, or false if it should run | |
605 | * again (for multishot). | |
606 | */ | |
9bb66906 | 607 | static inline bool io_recv_finish(struct io_kiocb *req, int *ret, |
100d6b17 PB |
608 | unsigned int cflags, bool mshot_finished, |
609 | unsigned issue_flags) | |
b3fdea6e DY |
610 | { |
611 | if (!(req->flags & REQ_F_APOLL_MULTISHOT)) { | |
612 | io_req_set_res(req, *ret, cflags); | |
613 | *ret = IOU_OK; | |
614 | return true; | |
615 | } | |
616 | ||
9bb66906 | 617 | if (!mshot_finished) { |
9b8c5475 DY |
618 | if (io_aux_cqe(req->ctx, issue_flags & IO_URING_F_COMPLETE_DEFER, |
619 | req->cqe.user_data, *ret, cflags | IORING_CQE_F_MORE, true)) { | |
b3fdea6e DY |
620 | io_recv_prep_retry(req); |
621 | return false; | |
622 | } | |
e2ad599d | 623 | /* Otherwise stop multishot but use the current result. */ |
b3fdea6e DY |
624 | } |
625 | ||
626 | io_req_set_res(req, *ret, cflags); | |
627 | ||
100d6b17 | 628 | if (issue_flags & IO_URING_F_MULTISHOT) |
b3fdea6e | 629 | *ret = IOU_STOP_MULTISHOT; |
e2df2ccb DY |
630 | else |
631 | *ret = IOU_OK; | |
b3fdea6e DY |
632 | return true; |
633 | } | |
634 | ||
9bb66906 DY |
635 | static int io_recvmsg_prep_multishot(struct io_async_msghdr *kmsg, |
636 | struct io_sr_msg *sr, void __user **buf, | |
637 | size_t *len) | |
638 | { | |
639 | unsigned long ubuf = (unsigned long) *buf; | |
640 | unsigned long hdr; | |
641 | ||
642 | hdr = sizeof(struct io_uring_recvmsg_out) + kmsg->namelen + | |
643 | kmsg->controllen; | |
644 | if (*len < hdr) | |
645 | return -EFAULT; | |
646 | ||
647 | if (kmsg->controllen) { | |
648 | unsigned long control = ubuf + hdr - kmsg->controllen; | |
649 | ||
d1f6222c | 650 | kmsg->msg.msg_control_user = (void __user *) control; |
9bb66906 DY |
651 | kmsg->msg.msg_controllen = kmsg->controllen; |
652 | } | |
653 | ||
654 | sr->buf = *buf; /* stash for later copy */ | |
d1f6222c | 655 | *buf = (void __user *) (ubuf + hdr); |
9bb66906 DY |
656 | kmsg->payloadlen = *len = *len - hdr; |
657 | return 0; | |
658 | } | |
659 | ||
660 | struct io_recvmsg_multishot_hdr { | |
661 | struct io_uring_recvmsg_out msg; | |
662 | struct sockaddr_storage addr; | |
663 | }; | |
664 | ||
665 | static int io_recvmsg_multishot(struct socket *sock, struct io_sr_msg *io, | |
666 | struct io_async_msghdr *kmsg, | |
667 | unsigned int flags, bool *finished) | |
668 | { | |
669 | int err; | |
670 | int copy_len; | |
671 | struct io_recvmsg_multishot_hdr hdr; | |
672 | ||
673 | if (kmsg->namelen) | |
674 | kmsg->msg.msg_name = &hdr.addr; | |
675 | kmsg->msg.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
676 | kmsg->msg.msg_namelen = 0; | |
677 | ||
678 | if (sock->file->f_flags & O_NONBLOCK) | |
679 | flags |= MSG_DONTWAIT; | |
680 | ||
681 | err = sock_recvmsg(sock, &kmsg->msg, flags); | |
682 | *finished = err <= 0; | |
683 | if (err < 0) | |
684 | return err; | |
685 | ||
686 | hdr.msg = (struct io_uring_recvmsg_out) { | |
687 | .controllen = kmsg->controllen - kmsg->msg.msg_controllen, | |
688 | .flags = kmsg->msg.msg_flags & ~MSG_CMSG_COMPAT | |
689 | }; | |
690 | ||
691 | hdr.msg.payloadlen = err; | |
692 | if (err > kmsg->payloadlen) | |
693 | err = kmsg->payloadlen; | |
694 | ||
695 | copy_len = sizeof(struct io_uring_recvmsg_out); | |
696 | if (kmsg->msg.msg_namelen > kmsg->namelen) | |
697 | copy_len += kmsg->namelen; | |
698 | else | |
699 | copy_len += kmsg->msg.msg_namelen; | |
700 | ||
701 | /* | |
702 | * "fromlen shall refer to the value before truncation.." | |
703 | * 1003.1g | |
704 | */ | |
705 | hdr.msg.namelen = kmsg->msg.msg_namelen; | |
706 | ||
707 | /* ensure that there is no gap between hdr and sockaddr_storage */ | |
708 | BUILD_BUG_ON(offsetof(struct io_recvmsg_multishot_hdr, addr) != | |
709 | sizeof(struct io_uring_recvmsg_out)); | |
710 | if (copy_to_user(io->buf, &hdr, copy_len)) { | |
711 | *finished = true; | |
712 | return -EFAULT; | |
713 | } | |
714 | ||
715 | return sizeof(struct io_uring_recvmsg_out) + kmsg->namelen + | |
716 | kmsg->controllen + err; | |
717 | } | |
718 | ||
f9ead18c JA |
719 | int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) |
720 | { | |
f2ccb5ae | 721 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
722 | struct io_async_msghdr iomsg, *kmsg; |
723 | struct socket *sock; | |
724 | unsigned int cflags; | |
725 | unsigned flags; | |
726 | int ret, min_ret = 0; | |
727 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
9bb66906 | 728 | bool mshot_finished = true; |
f9ead18c JA |
729 | |
730 | sock = sock_from_file(req->file); | |
731 | if (unlikely(!sock)) | |
732 | return -ENOTSOCK; | |
733 | ||
734 | if (req_has_async_data(req)) { | |
735 | kmsg = req->async_data; | |
736 | } else { | |
737 | ret = io_recvmsg_copy_hdr(req, &iomsg); | |
738 | if (ret) | |
739 | return ret; | |
740 | kmsg = &iomsg; | |
741 | } | |
742 | ||
743 | if (!(req->flags & REQ_F_POLLED) && | |
744 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
43e0bbbd | 745 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 746 | |
17add5ce PB |
747 | if (!io_check_multishot(req, issue_flags)) |
748 | return io_setup_async_msg(req, kmsg, issue_flags); | |
749 | ||
9bb66906 | 750 | retry_multishot: |
f9ead18c JA |
751 | if (io_do_buffer_select(req)) { |
752 | void __user *buf; | |
9bb66906 | 753 | size_t len = sr->len; |
f9ead18c | 754 | |
9bb66906 | 755 | buf = io_buffer_select(req, &len, issue_flags); |
f9ead18c JA |
756 | if (!buf) |
757 | return -ENOBUFS; | |
9bb66906 DY |
758 | |
759 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
760 | ret = io_recvmsg_prep_multishot(kmsg, sr, &buf, &len); | |
761 | if (ret) { | |
762 | io_kbuf_recycle(req, issue_flags); | |
763 | return ret; | |
764 | } | |
765 | } | |
766 | ||
f9ead18c | 767 | kmsg->fast_iov[0].iov_base = buf; |
9bb66906 | 768 | kmsg->fast_iov[0].iov_len = len; |
de4eda9d | 769 | iov_iter_init(&kmsg->msg.msg_iter, ITER_DEST, kmsg->fast_iov, 1, |
9bb66906 | 770 | len); |
f9ead18c JA |
771 | } |
772 | ||
773 | flags = sr->msg_flags; | |
774 | if (force_nonblock) | |
775 | flags |= MSG_DONTWAIT; | |
776 | if (flags & MSG_WAITALL) | |
777 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
778 | ||
779 | kmsg->msg.msg_get_inq = 1; | |
9bb66906 DY |
780 | if (req->flags & REQ_F_APOLL_MULTISHOT) |
781 | ret = io_recvmsg_multishot(sock, sr, kmsg, flags, | |
782 | &mshot_finished); | |
783 | else | |
784 | ret = __sys_recvmsg_sock(sock, &kmsg->msg, sr->umsg, | |
785 | kmsg->uaddr, flags); | |
786 | ||
f9ead18c | 787 | if (ret < min_ret) { |
9bb66906 DY |
788 | if (ret == -EAGAIN && force_nonblock) { |
789 | ret = io_setup_async_msg(req, kmsg, issue_flags); | |
100d6b17 | 790 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_MULTISHOT)) { |
9bb66906 DY |
791 | io_kbuf_recycle(req, issue_flags); |
792 | return IOU_ISSUE_SKIP_COMPLETE; | |
793 | } | |
794 | return ret; | |
795 | } | |
f9ead18c JA |
796 | if (ret > 0 && io_net_retry(sock, flags)) { |
797 | sr->done_io += ret; | |
798 | req->flags |= REQ_F_PARTIAL_IO; | |
43e0bbbd | 799 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 800 | } |
95eafc74 PB |
801 | if (ret == -ERESTARTSYS) |
802 | ret = -EINTR; | |
f9ead18c JA |
803 | req_set_fail(req); |
804 | } else if ((flags & MSG_WAITALL) && (kmsg->msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { | |
805 | req_set_fail(req); | |
806 | } | |
807 | ||
d4e097da | 808 | if (ret > 0) |
f9ead18c JA |
809 | ret += sr->done_io; |
810 | else if (sr->done_io) | |
811 | ret = sr->done_io; | |
d4e097da DY |
812 | else |
813 | io_kbuf_recycle(req, issue_flags); | |
814 | ||
f9ead18c JA |
815 | cflags = io_put_kbuf(req, issue_flags); |
816 | if (kmsg->msg.msg_inq) | |
817 | cflags |= IORING_CQE_F_SOCK_NONEMPTY; | |
b3fdea6e | 818 | |
100d6b17 | 819 | if (!io_recv_finish(req, &ret, cflags, mshot_finished, issue_flags)) |
9bb66906 DY |
820 | goto retry_multishot; |
821 | ||
822 | if (mshot_finished) { | |
9bb66906 DY |
823 | /* fast path, check for non-NULL to avoid function call */ |
824 | if (kmsg->free_iov) | |
825 | kfree(kmsg->free_iov); | |
6c3e8955 | 826 | io_netmsg_recycle(req, issue_flags); |
9bb66906 DY |
827 | req->flags &= ~REQ_F_NEED_CLEANUP; |
828 | } | |
829 | ||
830 | return ret; | |
f9ead18c JA |
831 | } |
832 | ||
833 | int io_recv(struct io_kiocb *req, unsigned int issue_flags) | |
834 | { | |
f2ccb5ae | 835 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
836 | struct msghdr msg; |
837 | struct socket *sock; | |
838 | struct iovec iov; | |
839 | unsigned int cflags; | |
840 | unsigned flags; | |
841 | int ret, min_ret = 0; | |
842 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
b3fdea6e | 843 | size_t len = sr->len; |
f9ead18c JA |
844 | |
845 | if (!(req->flags & REQ_F_POLLED) && | |
846 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
847 | return -EAGAIN; | |
848 | ||
17add5ce PB |
849 | if (!io_check_multishot(req, issue_flags)) |
850 | return -EAGAIN; | |
851 | ||
f9ead18c JA |
852 | sock = sock_from_file(req->file); |
853 | if (unlikely(!sock)) | |
854 | return -ENOTSOCK; | |
855 | ||
b3fdea6e | 856 | retry_multishot: |
f9ead18c JA |
857 | if (io_do_buffer_select(req)) { |
858 | void __user *buf; | |
859 | ||
b3fdea6e | 860 | buf = io_buffer_select(req, &len, issue_flags); |
f9ead18c JA |
861 | if (!buf) |
862 | return -ENOBUFS; | |
863 | sr->buf = buf; | |
864 | } | |
865 | ||
de4eda9d | 866 | ret = import_single_range(ITER_DEST, sr->buf, len, &iov, &msg.msg_iter); |
f9ead18c JA |
867 | if (unlikely(ret)) |
868 | goto out_free; | |
869 | ||
870 | msg.msg_name = NULL; | |
871 | msg.msg_namelen = 0; | |
872 | msg.msg_control = NULL; | |
873 | msg.msg_get_inq = 1; | |
874 | msg.msg_flags = 0; | |
875 | msg.msg_controllen = 0; | |
876 | msg.msg_iocb = NULL; | |
e02b6651 | 877 | msg.msg_ubuf = NULL; |
f9ead18c JA |
878 | |
879 | flags = sr->msg_flags; | |
880 | if (force_nonblock) | |
881 | flags |= MSG_DONTWAIT; | |
882 | if (flags & MSG_WAITALL) | |
883 | min_ret = iov_iter_count(&msg.msg_iter); | |
884 | ||
885 | ret = sock_recvmsg(sock, &msg, flags); | |
886 | if (ret < min_ret) { | |
b3fdea6e | 887 | if (ret == -EAGAIN && force_nonblock) { |
100d6b17 | 888 | if (issue_flags & IO_URING_F_MULTISHOT) { |
b3fdea6e DY |
889 | io_kbuf_recycle(req, issue_flags); |
890 | return IOU_ISSUE_SKIP_COMPLETE; | |
891 | } | |
892 | ||
f9ead18c | 893 | return -EAGAIN; |
b3fdea6e | 894 | } |
f9ead18c JA |
895 | if (ret > 0 && io_net_retry(sock, flags)) { |
896 | sr->len -= ret; | |
897 | sr->buf += ret; | |
898 | sr->done_io += ret; | |
899 | req->flags |= REQ_F_PARTIAL_IO; | |
900 | return -EAGAIN; | |
901 | } | |
95eafc74 PB |
902 | if (ret == -ERESTARTSYS) |
903 | ret = -EINTR; | |
f9ead18c JA |
904 | req_set_fail(req); |
905 | } else if ((flags & MSG_WAITALL) && (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { | |
906 | out_free: | |
907 | req_set_fail(req); | |
908 | } | |
909 | ||
d4e097da | 910 | if (ret > 0) |
f9ead18c JA |
911 | ret += sr->done_io; |
912 | else if (sr->done_io) | |
913 | ret = sr->done_io; | |
d4e097da DY |
914 | else |
915 | io_kbuf_recycle(req, issue_flags); | |
916 | ||
f9ead18c JA |
917 | cflags = io_put_kbuf(req, issue_flags); |
918 | if (msg.msg_inq) | |
919 | cflags |= IORING_CQE_F_SOCK_NONEMPTY; | |
b3fdea6e | 920 | |
100d6b17 | 921 | if (!io_recv_finish(req, &ret, cflags, ret <= 0, issue_flags)) |
b3fdea6e DY |
922 | goto retry_multishot; |
923 | ||
924 | return ret; | |
f9ead18c JA |
925 | } |
926 | ||
b0e9b551 | 927 | void io_send_zc_cleanup(struct io_kiocb *req) |
b48c312b | 928 | { |
ac9e5784 | 929 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
493108d9 | 930 | struct io_async_msghdr *io; |
b48c312b | 931 | |
493108d9 PB |
932 | if (req_has_async_data(req)) { |
933 | io = req->async_data; | |
4c17a496 PB |
934 | /* might be ->fast_iov if *msg_copy_hdr failed */ |
935 | if (io->free_iov != io->fast_iov) | |
936 | kfree(io->free_iov); | |
493108d9 | 937 | } |
a75155fa | 938 | if (zc->notif) { |
a75155fa PB |
939 | io_notif_flush(zc->notif); |
940 | zc->notif = NULL; | |
941 | } | |
b48c312b PB |
942 | } |
943 | ||
40725d1b PB |
944 | #define IO_ZC_FLAGS_COMMON (IORING_RECVSEND_POLL_FIRST | IORING_RECVSEND_FIXED_BUF) |
945 | #define IO_ZC_FLAGS_VALID (IO_ZC_FLAGS_COMMON | IORING_SEND_ZC_REPORT_USAGE) | |
946 | ||
b0e9b551 | 947 | int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
06a5464b | 948 | { |
ac9e5784 | 949 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
10c7d33e | 950 | struct io_ring_ctx *ctx = req->ctx; |
b48c312b | 951 | struct io_kiocb *notif; |
06a5464b | 952 | |
493108d9 | 953 | if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3))) |
b48c312b PB |
954 | return -EINVAL; |
955 | /* we don't support IOSQE_CQE_SKIP_SUCCESS just yet */ | |
956 | if (req->flags & REQ_F_CQE_SKIP) | |
06a5464b PB |
957 | return -EINVAL; |
958 | ||
e3366e02 PB |
959 | notif = zc->notif = io_alloc_notif(ctx); |
960 | if (!notif) | |
961 | return -ENOMEM; | |
962 | notif->cqe.user_data = req->cqe.user_data; | |
963 | notif->cqe.res = 0; | |
964 | notif->cqe.flags = IORING_CQE_F_NOTIF; | |
965 | req->flags |= REQ_F_NEED_CLEANUP; | |
40725d1b PB |
966 | |
967 | zc->flags = READ_ONCE(sqe->ioprio); | |
968 | if (unlikely(zc->flags & ~IO_ZC_FLAGS_COMMON)) { | |
969 | if (zc->flags & ~IO_ZC_FLAGS_VALID) | |
970 | return -EINVAL; | |
971 | if (zc->flags & IORING_SEND_ZC_REPORT_USAGE) { | |
972 | io_notif_set_extended(notif); | |
973 | io_notif_to_data(notif)->zc_report = true; | |
974 | } | |
975 | } | |
976 | ||
10c7d33e PB |
977 | if (zc->flags & IORING_RECVSEND_FIXED_BUF) { |
978 | unsigned idx = READ_ONCE(sqe->buf_index); | |
979 | ||
980 | if (unlikely(idx >= ctx->nr_user_bufs)) | |
981 | return -EFAULT; | |
982 | idx = array_index_nospec(idx, ctx->nr_user_bufs); | |
983 | req->imu = READ_ONCE(ctx->user_bufs[idx]); | |
e3366e02 | 984 | io_req_set_rsrc_node(notif, ctx, 0); |
10c7d33e | 985 | } |
06a5464b | 986 | |
493108d9 PB |
987 | if (req->opcode == IORING_OP_SEND_ZC) { |
988 | if (READ_ONCE(sqe->__pad3[0])) | |
989 | return -EINVAL; | |
990 | zc->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
991 | zc->addr_len = READ_ONCE(sqe->addr_len); | |
992 | } else { | |
993 | if (unlikely(sqe->addr2 || sqe->file_index)) | |
994 | return -EINVAL; | |
995 | if (unlikely(zc->flags & IORING_RECVSEND_FIXED_BUF)) | |
996 | return -EINVAL; | |
997 | } | |
998 | ||
06a5464b PB |
999 | zc->buf = u64_to_user_ptr(READ_ONCE(sqe->addr)); |
1000 | zc->len = READ_ONCE(sqe->len); | |
1001 | zc->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
06a5464b PB |
1002 | if (zc->msg_flags & MSG_DONTWAIT) |
1003 | req->flags |= REQ_F_NOWAIT; | |
092aeedb | 1004 | |
4a933e62 | 1005 | zc->done_io = 0; |
092aeedb | 1006 | |
06a5464b PB |
1007 | #ifdef CONFIG_COMPAT |
1008 | if (req->ctx->compat) | |
1009 | zc->msg_flags |= MSG_CMSG_COMPAT; | |
1010 | #endif | |
1011 | return 0; | |
1012 | } | |
1013 | ||
cd9021e8 PB |
1014 | static int io_sg_from_iter_iovec(struct sock *sk, struct sk_buff *skb, |
1015 | struct iov_iter *from, size_t length) | |
1016 | { | |
1017 | skb_zcopy_downgrade_managed(skb); | |
1018 | return __zerocopy_sg_from_iter(NULL, sk, skb, from, length); | |
1019 | } | |
1020 | ||
3ff1a0d3 PB |
1021 | static int io_sg_from_iter(struct sock *sk, struct sk_buff *skb, |
1022 | struct iov_iter *from, size_t length) | |
1023 | { | |
1024 | struct skb_shared_info *shinfo = skb_shinfo(skb); | |
1025 | int frag = shinfo->nr_frags; | |
1026 | int ret = 0; | |
1027 | struct bvec_iter bi; | |
1028 | ssize_t copied = 0; | |
1029 | unsigned long truesize = 0; | |
1030 | ||
cd9021e8 | 1031 | if (!frag) |
3ff1a0d3 | 1032 | shinfo->flags |= SKBFL_MANAGED_FRAG_REFS; |
cd9021e8 | 1033 | else if (unlikely(!skb_zcopy_managed(skb))) |
3ff1a0d3 | 1034 | return __zerocopy_sg_from_iter(NULL, sk, skb, from, length); |
3ff1a0d3 PB |
1035 | |
1036 | bi.bi_size = min(from->count, length); | |
1037 | bi.bi_bvec_done = from->iov_offset; | |
1038 | bi.bi_idx = 0; | |
1039 | ||
1040 | while (bi.bi_size && frag < MAX_SKB_FRAGS) { | |
1041 | struct bio_vec v = mp_bvec_iter_bvec(from->bvec, bi); | |
1042 | ||
1043 | copied += v.bv_len; | |
1044 | truesize += PAGE_ALIGN(v.bv_len + v.bv_offset); | |
1045 | __skb_fill_page_desc_noacc(shinfo, frag++, v.bv_page, | |
1046 | v.bv_offset, v.bv_len); | |
1047 | bvec_iter_advance_single(from->bvec, &bi, v.bv_len); | |
1048 | } | |
1049 | if (bi.bi_size) | |
1050 | ret = -EMSGSIZE; | |
1051 | ||
1052 | shinfo->nr_frags = frag; | |
1053 | from->bvec += bi.bi_idx; | |
1054 | from->nr_segs -= bi.bi_idx; | |
dfb58b17 | 1055 | from->count -= copied; |
3ff1a0d3 PB |
1056 | from->iov_offset = bi.bi_bvec_done; |
1057 | ||
1058 | skb->data_len += copied; | |
1059 | skb->len += copied; | |
1060 | skb->truesize += truesize; | |
1061 | ||
1062 | if (sk && sk->sk_type == SOCK_STREAM) { | |
1063 | sk_wmem_queued_add(sk, truesize); | |
1064 | if (!skb_zcopy_pure(skb)) | |
1065 | sk_mem_charge(sk, truesize); | |
1066 | } else { | |
1067 | refcount_add(truesize, &skb->sk->sk_wmem_alloc); | |
1068 | } | |
1069 | return ret; | |
1070 | } | |
1071 | ||
b0e9b551 | 1072 | int io_send_zc(struct io_kiocb *req, unsigned int issue_flags) |
06a5464b | 1073 | { |
6ae61b7a | 1074 | struct sockaddr_storage __address; |
ac9e5784 | 1075 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
06a5464b PB |
1076 | struct msghdr msg; |
1077 | struct iovec iov; | |
1078 | struct socket *sock; | |
6ae91ac9 | 1079 | unsigned msg_flags; |
06a5464b PB |
1080 | int ret, min_ret = 0; |
1081 | ||
06a5464b PB |
1082 | sock = sock_from_file(req->file); |
1083 | if (unlikely(!sock)) | |
1084 | return -ENOTSOCK; | |
edf81438 PB |
1085 | if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) |
1086 | return -EOPNOTSUPP; | |
06a5464b | 1087 | |
06a5464b PB |
1088 | msg.msg_name = NULL; |
1089 | msg.msg_control = NULL; | |
1090 | msg.msg_controllen = 0; | |
1091 | msg.msg_namelen = 0; | |
1092 | ||
86dc8f23 | 1093 | if (zc->addr) { |
581711c4 PB |
1094 | if (req_has_async_data(req)) { |
1095 | struct io_async_msghdr *io = req->async_data; | |
1096 | ||
6ae61b7a | 1097 | msg.msg_name = &io->addr; |
581711c4 PB |
1098 | } else { |
1099 | ret = move_addr_to_kernel(zc->addr, zc->addr_len, &__address); | |
1100 | if (unlikely(ret < 0)) | |
1101 | return ret; | |
1102 | msg.msg_name = (struct sockaddr *)&__address; | |
581711c4 | 1103 | } |
86dc8f23 PB |
1104 | msg.msg_namelen = zc->addr_len; |
1105 | } | |
1106 | ||
3c840053 PB |
1107 | if (!(req->flags & REQ_F_POLLED) && |
1108 | (zc->flags & IORING_RECVSEND_POLL_FIRST)) | |
6ae61b7a | 1109 | return io_setup_async_addr(req, &__address, issue_flags); |
3c840053 | 1110 | |
10c7d33e | 1111 | if (zc->flags & IORING_RECVSEND_FIXED_BUF) { |
de4eda9d | 1112 | ret = io_import_fixed(ITER_SOURCE, &msg.msg_iter, req->imu, |
10c7d33e PB |
1113 | (u64)(uintptr_t)zc->buf, zc->len); |
1114 | if (unlikely(ret)) | |
986e263d | 1115 | return ret; |
cd9021e8 | 1116 | msg.sg_from_iter = io_sg_from_iter; |
10c7d33e | 1117 | } else { |
42385b02 | 1118 | io_notif_set_extended(zc->notif); |
de4eda9d | 1119 | ret = import_single_range(ITER_SOURCE, zc->buf, zc->len, &iov, |
10c7d33e PB |
1120 | &msg.msg_iter); |
1121 | if (unlikely(ret)) | |
1122 | return ret; | |
b48c312b | 1123 | ret = io_notif_account_mem(zc->notif, zc->len); |
2e32ba56 PB |
1124 | if (unlikely(ret)) |
1125 | return ret; | |
cd9021e8 | 1126 | msg.sg_from_iter = io_sg_from_iter_iovec; |
10c7d33e | 1127 | } |
06a5464b PB |
1128 | |
1129 | msg_flags = zc->msg_flags | MSG_ZEROCOPY; | |
1130 | if (issue_flags & IO_URING_F_NONBLOCK) | |
1131 | msg_flags |= MSG_DONTWAIT; | |
1132 | if (msg_flags & MSG_WAITALL) | |
1133 | min_ret = iov_iter_count(&msg.msg_iter); | |
1134 | ||
1135 | msg.msg_flags = msg_flags; | |
b48c312b | 1136 | msg.msg_ubuf = &io_notif_to_data(zc->notif)->uarg; |
06a5464b PB |
1137 | ret = sock_sendmsg(sock, &msg); |
1138 | ||
1139 | if (unlikely(ret < min_ret)) { | |
1140 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
6ae61b7a | 1141 | return io_setup_async_addr(req, &__address, issue_flags); |
581711c4 | 1142 | |
4a933e62 PB |
1143 | if (ret > 0 && io_net_retry(sock, msg.msg_flags)) { |
1144 | zc->len -= ret; | |
1145 | zc->buf += ret; | |
1146 | zc->done_io += ret; | |
1147 | req->flags |= REQ_F_PARTIAL_IO; | |
6ae61b7a | 1148 | return io_setup_async_addr(req, &__address, issue_flags); |
4a933e62 PB |
1149 | } |
1150 | if (ret == -ERESTARTSYS) | |
1151 | ret = -EINTR; | |
5a848b7c | 1152 | req_set_fail(req); |
06a5464b PB |
1153 | } |
1154 | ||
4a933e62 PB |
1155 | if (ret >= 0) |
1156 | ret += zc->done_io; | |
1157 | else if (zc->done_io) | |
1158 | ret = zc->done_io; | |
b48c312b | 1159 | |
108893dd PB |
1160 | /* |
1161 | * If we're in io-wq we can't rely on tw ordering guarantees, defer | |
1162 | * flushing notif to io_send_zc_cleanup() | |
1163 | */ | |
1164 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { | |
1165 | io_notif_flush(zc->notif); | |
1166 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
1167 | } | |
6ae91ac9 | 1168 | io_req_set_res(req, ret, IORING_CQE_F_MORE); |
06a5464b PB |
1169 | return IOU_OK; |
1170 | } | |
1171 | ||
493108d9 PB |
1172 | int io_sendmsg_zc(struct io_kiocb *req, unsigned int issue_flags) |
1173 | { | |
1174 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); | |
1175 | struct io_async_msghdr iomsg, *kmsg; | |
1176 | struct socket *sock; | |
6ae91ac9 | 1177 | unsigned flags; |
493108d9 PB |
1178 | int ret, min_ret = 0; |
1179 | ||
42385b02 PB |
1180 | io_notif_set_extended(sr->notif); |
1181 | ||
493108d9 PB |
1182 | sock = sock_from_file(req->file); |
1183 | if (unlikely(!sock)) | |
1184 | return -ENOTSOCK; | |
cc767e7c PB |
1185 | if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) |
1186 | return -EOPNOTSUPP; | |
493108d9 PB |
1187 | |
1188 | if (req_has_async_data(req)) { | |
1189 | kmsg = req->async_data; | |
1190 | } else { | |
1191 | ret = io_sendmsg_copy_hdr(req, &iomsg); | |
1192 | if (ret) | |
1193 | return ret; | |
1194 | kmsg = &iomsg; | |
1195 | } | |
1196 | ||
1197 | if (!(req->flags & REQ_F_POLLED) && | |
1198 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
1199 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1200 | ||
1201 | flags = sr->msg_flags | MSG_ZEROCOPY; | |
1202 | if (issue_flags & IO_URING_F_NONBLOCK) | |
1203 | flags |= MSG_DONTWAIT; | |
1204 | if (flags & MSG_WAITALL) | |
1205 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
1206 | ||
1207 | kmsg->msg.msg_ubuf = &io_notif_to_data(sr->notif)->uarg; | |
1208 | kmsg->msg.sg_from_iter = io_sg_from_iter_iovec; | |
1209 | ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); | |
1210 | ||
1211 | if (unlikely(ret < min_ret)) { | |
1212 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
1213 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1214 | ||
1215 | if (ret > 0 && io_net_retry(sock, flags)) { | |
1216 | sr->done_io += ret; | |
1217 | req->flags |= REQ_F_PARTIAL_IO; | |
1218 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1219 | } | |
493108d9 PB |
1220 | if (ret == -ERESTARTSYS) |
1221 | ret = -EINTR; | |
1222 | req_set_fail(req); | |
1223 | } | |
1224 | /* fast path, check for non-NULL to avoid function call */ | |
108893dd | 1225 | if (kmsg->free_iov) { |
493108d9 | 1226 | kfree(kmsg->free_iov); |
108893dd PB |
1227 | kmsg->free_iov = NULL; |
1228 | } | |
493108d9 PB |
1229 | |
1230 | io_netmsg_recycle(req, issue_flags); | |
1231 | if (ret >= 0) | |
1232 | ret += sr->done_io; | |
1233 | else if (sr->done_io) | |
1234 | ret = sr->done_io; | |
1235 | ||
108893dd PB |
1236 | /* |
1237 | * If we're in io-wq we can't rely on tw ordering guarantees, defer | |
1238 | * flushing notif to io_send_zc_cleanup() | |
1239 | */ | |
1240 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { | |
1241 | io_notif_flush(sr->notif); | |
1242 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
1243 | } | |
6ae91ac9 | 1244 | io_req_set_res(req, ret, IORING_CQE_F_MORE); |
493108d9 PB |
1245 | return IOU_OK; |
1246 | } | |
1247 | ||
7e6b638e PB |
1248 | void io_sendrecv_fail(struct io_kiocb *req) |
1249 | { | |
1250 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); | |
7e6b638e PB |
1251 | |
1252 | if (req->flags & REQ_F_PARTIAL_IO) | |
6ae91ac9 PB |
1253 | req->cqe.res = sr->done_io; |
1254 | ||
c4c0009e | 1255 | if ((req->flags & REQ_F_NEED_CLEANUP) && |
6ae91ac9 PB |
1256 | (req->opcode == IORING_OP_SEND_ZC || req->opcode == IORING_OP_SENDMSG_ZC)) |
1257 | req->cqe.flags |= IORING_CQE_F_MORE; | |
5693bcce PB |
1258 | } |
1259 | ||
f9ead18c JA |
1260 | int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
1261 | { | |
f2ccb5ae | 1262 | struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept); |
f9ead18c JA |
1263 | unsigned flags; |
1264 | ||
1265 | if (sqe->len || sqe->buf_index) | |
1266 | return -EINVAL; | |
1267 | ||
1268 | accept->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
1269 | accept->addr_len = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
1270 | accept->flags = READ_ONCE(sqe->accept_flags); | |
1271 | accept->nofile = rlimit(RLIMIT_NOFILE); | |
1272 | flags = READ_ONCE(sqe->ioprio); | |
1273 | if (flags & ~IORING_ACCEPT_MULTISHOT) | |
1274 | return -EINVAL; | |
1275 | ||
1276 | accept->file_slot = READ_ONCE(sqe->file_index); | |
1277 | if (accept->file_slot) { | |
1278 | if (accept->flags & SOCK_CLOEXEC) | |
1279 | return -EINVAL; | |
1280 | if (flags & IORING_ACCEPT_MULTISHOT && | |
1281 | accept->file_slot != IORING_FILE_INDEX_ALLOC) | |
1282 | return -EINVAL; | |
1283 | } | |
1284 | if (accept->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1285 | return -EINVAL; | |
1286 | if (SOCK_NONBLOCK != O_NONBLOCK && (accept->flags & SOCK_NONBLOCK)) | |
1287 | accept->flags = (accept->flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1288 | if (flags & IORING_ACCEPT_MULTISHOT) | |
1289 | req->flags |= REQ_F_APOLL_MULTISHOT; | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | int io_accept(struct io_kiocb *req, unsigned int issue_flags) | |
1294 | { | |
1295 | struct io_ring_ctx *ctx = req->ctx; | |
f2ccb5ae | 1296 | struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept); |
f9ead18c JA |
1297 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; |
1298 | unsigned int file_flags = force_nonblock ? O_NONBLOCK : 0; | |
1299 | bool fixed = !!accept->file_slot; | |
1300 | struct file *file; | |
1301 | int ret, fd; | |
1302 | ||
17add5ce PB |
1303 | if (!io_check_multishot(req, issue_flags)) |
1304 | return -EAGAIN; | |
f9ead18c JA |
1305 | retry: |
1306 | if (!fixed) { | |
1307 | fd = __get_unused_fd_flags(accept->flags, accept->nofile); | |
1308 | if (unlikely(fd < 0)) | |
1309 | return fd; | |
1310 | } | |
1311 | file = do_accept(req->file, file_flags, accept->addr, accept->addr_len, | |
1312 | accept->flags); | |
1313 | if (IS_ERR(file)) { | |
1314 | if (!fixed) | |
1315 | put_unused_fd(fd); | |
1316 | ret = PTR_ERR(file); | |
1317 | if (ret == -EAGAIN && force_nonblock) { | |
1318 | /* | |
1319 | * if it's multishot and polled, we don't need to | |
1320 | * return EAGAIN to arm the poll infra since it | |
1321 | * has already been done | |
1322 | */ | |
91482864 | 1323 | if (issue_flags & IO_URING_F_MULTISHOT) |
f9ead18c JA |
1324 | ret = IOU_ISSUE_SKIP_COMPLETE; |
1325 | return ret; | |
1326 | } | |
1327 | if (ret == -ERESTARTSYS) | |
1328 | ret = -EINTR; | |
1329 | req_set_fail(req); | |
1330 | } else if (!fixed) { | |
1331 | fd_install(fd, file); | |
1332 | ret = fd; | |
1333 | } else { | |
1334 | ret = io_fixed_fd_install(req, issue_flags, file, | |
1335 | accept->file_slot); | |
1336 | } | |
1337 | ||
1338 | if (!(req->flags & REQ_F_APOLL_MULTISHOT)) { | |
1339 | io_req_set_res(req, ret, 0); | |
1340 | return IOU_OK; | |
1341 | } | |
f9ead18c | 1342 | |
515e2696 DY |
1343 | if (ret < 0) |
1344 | return ret; | |
9b8c5475 DY |
1345 | if (io_aux_cqe(ctx, issue_flags & IO_URING_F_COMPLETE_DEFER, |
1346 | req->cqe.user_data, ret, IORING_CQE_F_MORE, true)) | |
d245bca6 | 1347 | goto retry; |
cbd25748 | 1348 | |
515e2696 | 1349 | return -ECANCELED; |
f9ead18c JA |
1350 | } |
1351 | ||
1352 | int io_socket_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
1353 | { | |
f2ccb5ae | 1354 | struct io_socket *sock = io_kiocb_to_cmd(req, struct io_socket); |
f9ead18c JA |
1355 | |
1356 | if (sqe->addr || sqe->rw_flags || sqe->buf_index) | |
1357 | return -EINVAL; | |
1358 | ||
1359 | sock->domain = READ_ONCE(sqe->fd); | |
1360 | sock->type = READ_ONCE(sqe->off); | |
1361 | sock->protocol = READ_ONCE(sqe->len); | |
1362 | sock->file_slot = READ_ONCE(sqe->file_index); | |
1363 | sock->nofile = rlimit(RLIMIT_NOFILE); | |
1364 | ||
1365 | sock->flags = sock->type & ~SOCK_TYPE_MASK; | |
1366 | if (sock->file_slot && (sock->flags & SOCK_CLOEXEC)) | |
1367 | return -EINVAL; | |
1368 | if (sock->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1369 | return -EINVAL; | |
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | int io_socket(struct io_kiocb *req, unsigned int issue_flags) | |
1374 | { | |
f2ccb5ae | 1375 | struct io_socket *sock = io_kiocb_to_cmd(req, struct io_socket); |
f9ead18c JA |
1376 | bool fixed = !!sock->file_slot; |
1377 | struct file *file; | |
1378 | int ret, fd; | |
1379 | ||
1380 | if (!fixed) { | |
1381 | fd = __get_unused_fd_flags(sock->flags, sock->nofile); | |
1382 | if (unlikely(fd < 0)) | |
1383 | return fd; | |
1384 | } | |
1385 | file = __sys_socket_file(sock->domain, sock->type, sock->protocol); | |
1386 | if (IS_ERR(file)) { | |
1387 | if (!fixed) | |
1388 | put_unused_fd(fd); | |
1389 | ret = PTR_ERR(file); | |
1390 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
1391 | return -EAGAIN; | |
1392 | if (ret == -ERESTARTSYS) | |
1393 | ret = -EINTR; | |
1394 | req_set_fail(req); | |
1395 | } else if (!fixed) { | |
1396 | fd_install(fd, file); | |
1397 | ret = fd; | |
1398 | } else { | |
1399 | ret = io_fixed_fd_install(req, issue_flags, file, | |
1400 | sock->file_slot); | |
1401 | } | |
1402 | io_req_set_res(req, ret, 0); | |
1403 | return IOU_OK; | |
1404 | } | |
1405 | ||
1406 | int io_connect_prep_async(struct io_kiocb *req) | |
1407 | { | |
1408 | struct io_async_connect *io = req->async_data; | |
f2ccb5ae | 1409 | struct io_connect *conn = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1410 | |
1411 | return move_addr_to_kernel(conn->addr, conn->addr_len, &io->address); | |
1412 | } | |
1413 | ||
1414 | int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
1415 | { | |
f2ccb5ae | 1416 | struct io_connect *conn = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1417 | |
1418 | if (sqe->len || sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in) | |
1419 | return -EINVAL; | |
1420 | ||
1421 | conn->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
1422 | conn->addr_len = READ_ONCE(sqe->addr2); | |
3fb1bd68 | 1423 | conn->in_progress = false; |
f9ead18c JA |
1424 | return 0; |
1425 | } | |
1426 | ||
1427 | int io_connect(struct io_kiocb *req, unsigned int issue_flags) | |
1428 | { | |
f2ccb5ae | 1429 | struct io_connect *connect = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1430 | struct io_async_connect __io, *io; |
1431 | unsigned file_flags; | |
1432 | int ret; | |
1433 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
1434 | ||
3fb1bd68 JA |
1435 | if (connect->in_progress) { |
1436 | struct socket *socket; | |
1437 | ||
1438 | ret = -ENOTSOCK; | |
1439 | socket = sock_from_file(req->file); | |
1440 | if (socket) | |
1441 | ret = sock_error(socket->sk); | |
1442 | goto out; | |
1443 | } | |
1444 | ||
f9ead18c JA |
1445 | if (req_has_async_data(req)) { |
1446 | io = req->async_data; | |
1447 | } else { | |
1448 | ret = move_addr_to_kernel(connect->addr, | |
1449 | connect->addr_len, | |
1450 | &__io.address); | |
1451 | if (ret) | |
1452 | goto out; | |
1453 | io = &__io; | |
1454 | } | |
1455 | ||
1456 | file_flags = force_nonblock ? O_NONBLOCK : 0; | |
1457 | ||
1458 | ret = __sys_connect_file(req->file, &io->address, | |
1459 | connect->addr_len, file_flags); | |
1460 | if ((ret == -EAGAIN || ret == -EINPROGRESS) && force_nonblock) { | |
3fb1bd68 JA |
1461 | if (ret == -EINPROGRESS) { |
1462 | connect->in_progress = true; | |
1463 | } else { | |
1464 | if (req_has_async_data(req)) | |
1465 | return -EAGAIN; | |
1466 | if (io_alloc_async_data(req)) { | |
1467 | ret = -ENOMEM; | |
1468 | goto out; | |
1469 | } | |
1470 | memcpy(req->async_data, &__io, sizeof(__io)); | |
f9ead18c | 1471 | } |
f9ead18c JA |
1472 | return -EAGAIN; |
1473 | } | |
1474 | if (ret == -ERESTARTSYS) | |
1475 | ret = -EINTR; | |
1476 | out: | |
1477 | if (ret < 0) | |
1478 | req_set_fail(req); | |
1479 | io_req_set_res(req, ret, 0); | |
1480 | return IOU_OK; | |
1481 | } | |
43e0bbbd JA |
1482 | |
1483 | void io_netmsg_cache_free(struct io_cache_entry *entry) | |
1484 | { | |
1485 | kfree(container_of(entry, struct io_async_msghdr, cache)); | |
1486 | } | |
f9ead18c | 1487 | #endif |