Commit | Line | Data |
---|---|---|
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; |
74e2e17e | 50 | bool seen_econnaborted; |
f9ead18c JA |
51 | }; |
52 | ||
53 | struct io_sr_msg { | |
54 | struct file *file; | |
55 | union { | |
56 | struct compat_msghdr __user *umsg_compat; | |
57 | struct user_msghdr __user *umsg; | |
58 | void __user *buf; | |
59 | }; | |
0b048557 PB |
60 | unsigned len; |
61 | unsigned done_io; | |
293402e5 | 62 | unsigned msg_flags; |
0b048557 | 63 | u16 flags; |
516e82f0 | 64 | /* initialised and used only by !msg send variants */ |
0b048557 | 65 | u16 addr_len; |
b00c51ef | 66 | u16 buf_group; |
092aeedb | 67 | void __user *addr; |
cac9e441 | 68 | void __user *msg_control; |
516e82f0 | 69 | /* used only for send zerocopy */ |
b48c312b | 70 | struct io_kiocb *notif; |
06a5464b PB |
71 | }; |
72 | ||
17add5ce PB |
73 | static inline bool io_check_multishot(struct io_kiocb *req, |
74 | unsigned int issue_flags) | |
75 | { | |
76 | /* | |
77 | * When ->locked_cq is set we only allow to post CQEs from the original | |
78 | * task context. Usual request completions will be handled in other | |
79 | * generic paths but multipoll may decide to post extra cqes. | |
80 | */ | |
81 | return !(issue_flags & IO_URING_F_IOWQ) || | |
82 | !(issue_flags & IO_URING_F_MULTISHOT) || | |
83 | !req->ctx->task_complete; | |
84 | } | |
85 | ||
f9ead18c JA |
86 | int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
87 | { | |
f2ccb5ae | 88 | struct io_shutdown *shutdown = io_kiocb_to_cmd(req, struct io_shutdown); |
f9ead18c JA |
89 | |
90 | if (unlikely(sqe->off || sqe->addr || sqe->rw_flags || | |
91 | sqe->buf_index || sqe->splice_fd_in)) | |
92 | return -EINVAL; | |
93 | ||
94 | shutdown->how = READ_ONCE(sqe->len); | |
aebb224f | 95 | req->flags |= REQ_F_FORCE_ASYNC; |
f9ead18c JA |
96 | return 0; |
97 | } | |
98 | ||
99 | int io_shutdown(struct io_kiocb *req, unsigned int issue_flags) | |
100 | { | |
f2ccb5ae | 101 | struct io_shutdown *shutdown = io_kiocb_to_cmd(req, struct io_shutdown); |
f9ead18c JA |
102 | struct socket *sock; |
103 | int ret; | |
104 | ||
aebb224f | 105 | WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); |
f9ead18c JA |
106 | |
107 | sock = sock_from_file(req->file); | |
108 | if (unlikely(!sock)) | |
109 | return -ENOTSOCK; | |
110 | ||
111 | ret = __sys_shutdown_sock(sock, shutdown->how); | |
112 | io_req_set_res(req, ret, 0); | |
113 | return IOU_OK; | |
114 | } | |
115 | ||
116 | static bool io_net_retry(struct socket *sock, int flags) | |
117 | { | |
118 | if (!(flags & MSG_WAITALL)) | |
119 | return false; | |
120 | return sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET; | |
121 | } | |
122 | ||
43e0bbbd JA |
123 | static void io_netmsg_recycle(struct io_kiocb *req, unsigned int issue_flags) |
124 | { | |
125 | struct io_async_msghdr *hdr = req->async_data; | |
126 | ||
06360426 | 127 | if (!req_has_async_data(req) || issue_flags & IO_URING_F_UNLOCKED) |
43e0bbbd JA |
128 | return; |
129 | ||
130 | /* Let normal cleanup path reap it if we fail adding to the cache */ | |
131 | if (io_alloc_cache_put(&req->ctx->netmsg_cache, &hdr->cache)) { | |
132 | req->async_data = NULL; | |
133 | req->flags &= ~REQ_F_ASYNC_DATA; | |
134 | } | |
135 | } | |
136 | ||
858c293e PB |
137 | static struct io_async_msghdr *io_msg_alloc_async(struct io_kiocb *req, |
138 | unsigned int issue_flags) | |
43e0bbbd JA |
139 | { |
140 | struct io_ring_ctx *ctx = req->ctx; | |
141 | struct io_cache_entry *entry; | |
4c17a496 | 142 | struct io_async_msghdr *hdr; |
43e0bbbd | 143 | |
df730ec2 XL |
144 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { |
145 | entry = io_alloc_cache_get(&ctx->netmsg_cache); | |
146 | if (entry) { | |
147 | hdr = container_of(entry, struct io_async_msghdr, cache); | |
148 | hdr->free_iov = NULL; | |
149 | req->flags |= REQ_F_ASYNC_DATA; | |
150 | req->async_data = hdr; | |
151 | return hdr; | |
152 | } | |
43e0bbbd JA |
153 | } |
154 | ||
4c17a496 PB |
155 | if (!io_alloc_async_data(req)) { |
156 | hdr = req->async_data; | |
157 | hdr->free_iov = NULL; | |
158 | return hdr; | |
159 | } | |
43e0bbbd JA |
160 | return NULL; |
161 | } | |
162 | ||
858c293e PB |
163 | static inline struct io_async_msghdr *io_msg_alloc_async_prep(struct io_kiocb *req) |
164 | { | |
165 | /* ->prep_async is always called from the submission context */ | |
166 | return io_msg_alloc_async(req, 0); | |
167 | } | |
168 | ||
f9ead18c | 169 | static int io_setup_async_msg(struct io_kiocb *req, |
43e0bbbd JA |
170 | struct io_async_msghdr *kmsg, |
171 | unsigned int issue_flags) | |
f9ead18c | 172 | { |
3f743e9b | 173 | struct io_async_msghdr *async_msg; |
f9ead18c | 174 | |
3f743e9b | 175 | if (req_has_async_data(req)) |
f9ead18c | 176 | return -EAGAIN; |
858c293e | 177 | async_msg = io_msg_alloc_async(req, issue_flags); |
43e0bbbd | 178 | if (!async_msg) { |
f9ead18c JA |
179 | kfree(kmsg->free_iov); |
180 | return -ENOMEM; | |
181 | } | |
f9ead18c JA |
182 | req->flags |= REQ_F_NEED_CLEANUP; |
183 | memcpy(async_msg, kmsg, sizeof(*kmsg)); | |
6f10ae8a PB |
184 | if (async_msg->msg.msg_name) |
185 | async_msg->msg.msg_name = &async_msg->addr; | |
f9ead18c | 186 | /* if were using fast_iov, set it to the new one */ |
4b61152e | 187 | if (iter_is_iovec(&kmsg->msg.msg_iter) && !kmsg->free_iov) { |
de4f5fed JA |
188 | size_t fast_idx = iter_iov(&kmsg->msg.msg_iter) - kmsg->fast_iov; |
189 | async_msg->msg.msg_iter.__iov = &async_msg->fast_iov[fast_idx]; | |
3e4cb6eb | 190 | } |
f9ead18c JA |
191 | |
192 | return -EAGAIN; | |
193 | } | |
194 | ||
195 | static int io_sendmsg_copy_hdr(struct io_kiocb *req, | |
196 | struct io_async_msghdr *iomsg) | |
197 | { | |
f2ccb5ae | 198 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
cac9e441 | 199 | int ret; |
f9ead18c JA |
200 | |
201 | iomsg->msg.msg_name = &iomsg->addr; | |
202 | iomsg->free_iov = iomsg->fast_iov; | |
cac9e441 | 203 | ret = sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags, |
f9ead18c | 204 | &iomsg->free_iov); |
cac9e441 | 205 | /* save msg_control as sys_sendmsg() overwrites it */ |
26fed836 | 206 | sr->msg_control = iomsg->msg.msg_control_user; |
cac9e441 | 207 | return ret; |
f9ead18c JA |
208 | } |
209 | ||
516e82f0 | 210 | int io_send_prep_async(struct io_kiocb *req) |
581711c4 | 211 | { |
ac9e5784 | 212 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
581711c4 PB |
213 | struct io_async_msghdr *io; |
214 | int ret; | |
215 | ||
216 | if (!zc->addr || req_has_async_data(req)) | |
217 | return 0; | |
6bf8ad25 PB |
218 | io = io_msg_alloc_async_prep(req); |
219 | if (!io) | |
581711c4 | 220 | return -ENOMEM; |
581711c4 PB |
221 | ret = move_addr_to_kernel(zc->addr, zc->addr_len, &io->addr); |
222 | return ret; | |
223 | } | |
224 | ||
225 | static int io_setup_async_addr(struct io_kiocb *req, | |
6ae61b7a | 226 | struct sockaddr_storage *addr_storage, |
581711c4 PB |
227 | unsigned int issue_flags) |
228 | { | |
6ae61b7a | 229 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
581711c4 PB |
230 | struct io_async_msghdr *io; |
231 | ||
6ae61b7a | 232 | if (!sr->addr || req_has_async_data(req)) |
581711c4 | 233 | return -EAGAIN; |
6bf8ad25 PB |
234 | io = io_msg_alloc_async(req, issue_flags); |
235 | if (!io) | |
581711c4 | 236 | return -ENOMEM; |
6ae61b7a | 237 | memcpy(&io->addr, addr_storage, sizeof(io->addr)); |
581711c4 PB |
238 | return -EAGAIN; |
239 | } | |
240 | ||
f9ead18c JA |
241 | int io_sendmsg_prep_async(struct io_kiocb *req) |
242 | { | |
243 | int ret; | |
244 | ||
858c293e PB |
245 | if (!io_msg_alloc_async_prep(req)) |
246 | return -ENOMEM; | |
f9ead18c JA |
247 | ret = io_sendmsg_copy_hdr(req, req->async_data); |
248 | if (!ret) | |
249 | req->flags |= REQ_F_NEED_CLEANUP; | |
250 | return ret; | |
251 | } | |
252 | ||
253 | void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req) | |
254 | { | |
255 | struct io_async_msghdr *io = req->async_data; | |
256 | ||
257 | kfree(io->free_iov); | |
258 | } | |
259 | ||
260 | int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
261 | { | |
f2ccb5ae | 262 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c | 263 | |
516e82f0 PB |
264 | if (req->opcode == IORING_OP_SEND) { |
265 | if (READ_ONCE(sqe->__pad3[0])) | |
266 | return -EINVAL; | |
267 | sr->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
268 | sr->addr_len = READ_ONCE(sqe->addr_len); | |
269 | } else if (sqe->addr2 || sqe->file_index) { | |
f9ead18c | 270 | return -EINVAL; |
516e82f0 | 271 | } |
f9ead18c JA |
272 | |
273 | sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
274 | sr->len = READ_ONCE(sqe->len); | |
275 | sr->flags = READ_ONCE(sqe->ioprio); | |
276 | if (sr->flags & ~IORING_RECVSEND_POLL_FIRST) | |
277 | return -EINVAL; | |
278 | sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
279 | if (sr->msg_flags & MSG_DONTWAIT) | |
280 | req->flags |= REQ_F_NOWAIT; | |
281 | ||
282 | #ifdef CONFIG_COMPAT | |
283 | if (req->ctx->compat) | |
284 | sr->msg_flags |= MSG_CMSG_COMPAT; | |
285 | #endif | |
286 | sr->done_io = 0; | |
287 | return 0; | |
288 | } | |
289 | ||
290 | int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags) | |
291 | { | |
f2ccb5ae | 292 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
293 | struct io_async_msghdr iomsg, *kmsg; |
294 | struct socket *sock; | |
295 | unsigned flags; | |
296 | int min_ret = 0; | |
297 | int ret; | |
298 | ||
299 | sock = sock_from_file(req->file); | |
300 | if (unlikely(!sock)) | |
301 | return -ENOTSOCK; | |
302 | ||
303 | if (req_has_async_data(req)) { | |
304 | kmsg = req->async_data; | |
26fed836 | 305 | kmsg->msg.msg_control_user = sr->msg_control; |
f9ead18c JA |
306 | } else { |
307 | ret = io_sendmsg_copy_hdr(req, &iomsg); | |
308 | if (ret) | |
309 | return ret; | |
310 | kmsg = &iomsg; | |
311 | } | |
312 | ||
313 | if (!(req->flags & REQ_F_POLLED) && | |
314 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
43e0bbbd | 315 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c JA |
316 | |
317 | flags = sr->msg_flags; | |
318 | if (issue_flags & IO_URING_F_NONBLOCK) | |
319 | flags |= MSG_DONTWAIT; | |
320 | if (flags & MSG_WAITALL) | |
321 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
322 | ||
323 | ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); | |
324 | ||
325 | if (ret < min_ret) { | |
326 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
43e0bbbd | 327 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 328 | if (ret > 0 && io_net_retry(sock, flags)) { |
b1dc4920 JA |
329 | kmsg->msg.msg_controllen = 0; |
330 | kmsg->msg.msg_control = NULL; | |
f9ead18c JA |
331 | sr->done_io += ret; |
332 | req->flags |= REQ_F_PARTIAL_IO; | |
43e0bbbd | 333 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 334 | } |
95eafc74 PB |
335 | if (ret == -ERESTARTSYS) |
336 | ret = -EINTR; | |
f9ead18c JA |
337 | req_set_fail(req); |
338 | } | |
339 | /* fast path, check for non-NULL to avoid function call */ | |
340 | if (kmsg->free_iov) | |
341 | kfree(kmsg->free_iov); | |
342 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
43e0bbbd | 343 | io_netmsg_recycle(req, issue_flags); |
f9ead18c JA |
344 | if (ret >= 0) |
345 | ret += sr->done_io; | |
346 | else if (sr->done_io) | |
347 | ret = sr->done_io; | |
348 | io_req_set_res(req, ret, 0); | |
349 | return IOU_OK; | |
350 | } | |
351 | ||
352 | int io_send(struct io_kiocb *req, unsigned int issue_flags) | |
353 | { | |
516e82f0 | 354 | struct sockaddr_storage __address; |
f2ccb5ae | 355 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c | 356 | struct msghdr msg; |
f9ead18c JA |
357 | struct socket *sock; |
358 | unsigned flags; | |
359 | int min_ret = 0; | |
360 | int ret; | |
361 | ||
04360d3e PB |
362 | msg.msg_name = NULL; |
363 | msg.msg_control = NULL; | |
364 | msg.msg_controllen = 0; | |
365 | msg.msg_namelen = 0; | |
366 | msg.msg_ubuf = NULL; | |
367 | ||
516e82f0 PB |
368 | if (sr->addr) { |
369 | if (req_has_async_data(req)) { | |
370 | struct io_async_msghdr *io = req->async_data; | |
371 | ||
372 | msg.msg_name = &io->addr; | |
373 | } else { | |
374 | ret = move_addr_to_kernel(sr->addr, sr->addr_len, &__address); | |
375 | if (unlikely(ret < 0)) | |
376 | return ret; | |
377 | msg.msg_name = (struct sockaddr *)&__address; | |
378 | } | |
379 | msg.msg_namelen = sr->addr_len; | |
380 | } | |
381 | ||
f9ead18c JA |
382 | if (!(req->flags & REQ_F_POLLED) && |
383 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
516e82f0 | 384 | return io_setup_async_addr(req, &__address, issue_flags); |
f9ead18c JA |
385 | |
386 | sock = sock_from_file(req->file); | |
387 | if (unlikely(!sock)) | |
388 | return -ENOTSOCK; | |
389 | ||
4b61152e | 390 | ret = import_ubuf(ITER_SOURCE, sr->buf, sr->len, &msg.msg_iter); |
f9ead18c JA |
391 | if (unlikely(ret)) |
392 | return ret; | |
393 | ||
f9ead18c JA |
394 | flags = sr->msg_flags; |
395 | if (issue_flags & IO_URING_F_NONBLOCK) | |
396 | flags |= MSG_DONTWAIT; | |
397 | if (flags & MSG_WAITALL) | |
398 | min_ret = iov_iter_count(&msg.msg_iter); | |
399 | ||
b841b901 | 400 | flags &= ~MSG_INTERNAL_SENDMSG_FLAGS; |
f9ead18c JA |
401 | msg.msg_flags = flags; |
402 | ret = sock_sendmsg(sock, &msg); | |
403 | if (ret < min_ret) { | |
404 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
516e82f0 PB |
405 | return io_setup_async_addr(req, &__address, issue_flags); |
406 | ||
f9ead18c JA |
407 | if (ret > 0 && io_net_retry(sock, flags)) { |
408 | sr->len -= ret; | |
409 | sr->buf += ret; | |
410 | sr->done_io += ret; | |
411 | req->flags |= REQ_F_PARTIAL_IO; | |
516e82f0 | 412 | return io_setup_async_addr(req, &__address, issue_flags); |
f9ead18c | 413 | } |
95eafc74 PB |
414 | if (ret == -ERESTARTSYS) |
415 | ret = -EINTR; | |
f9ead18c JA |
416 | req_set_fail(req); |
417 | } | |
418 | if (ret >= 0) | |
419 | ret += sr->done_io; | |
420 | else if (sr->done_io) | |
421 | ret = sr->done_io; | |
422 | io_req_set_res(req, ret, 0); | |
423 | return IOU_OK; | |
424 | } | |
425 | ||
9bb66906 DY |
426 | static bool io_recvmsg_multishot_overflow(struct io_async_msghdr *iomsg) |
427 | { | |
9b0fc3c0 | 428 | int hdr; |
9bb66906 | 429 | |
9b0fc3c0 | 430 | if (iomsg->namelen < 0) |
9bb66906 | 431 | return true; |
9b0fc3c0 DY |
432 | if (check_add_overflow((int)sizeof(struct io_uring_recvmsg_out), |
433 | iomsg->namelen, &hdr)) | |
9bb66906 | 434 | return true; |
9b0fc3c0 | 435 | if (check_add_overflow(hdr, (int)iomsg->controllen, &hdr)) |
9bb66906 DY |
436 | return true; |
437 | ||
438 | return false; | |
439 | } | |
440 | ||
f9ead18c JA |
441 | static int __io_recvmsg_copy_hdr(struct io_kiocb *req, |
442 | struct io_async_msghdr *iomsg) | |
443 | { | |
f2ccb5ae | 444 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
7fa875b8 | 445 | struct user_msghdr msg; |
f9ead18c JA |
446 | int ret; |
447 | ||
7fa875b8 DY |
448 | if (copy_from_user(&msg, sr->umsg, sizeof(*sr->umsg))) |
449 | return -EFAULT; | |
450 | ||
451 | ret = __copy_msghdr(&iomsg->msg, &msg, &iomsg->uaddr); | |
f9ead18c JA |
452 | if (ret) |
453 | return ret; | |
454 | ||
455 | if (req->flags & REQ_F_BUFFER_SELECT) { | |
7fa875b8 | 456 | if (msg.msg_iovlen == 0) { |
5702196e DY |
457 | sr->len = iomsg->fast_iov[0].iov_len = 0; |
458 | iomsg->fast_iov[0].iov_base = NULL; | |
459 | iomsg->free_iov = NULL; | |
7fa875b8 | 460 | } else if (msg.msg_iovlen > 1) { |
f9ead18c | 461 | return -EINVAL; |
5702196e | 462 | } else { |
7fa875b8 | 463 | if (copy_from_user(iomsg->fast_iov, msg.msg_iov, sizeof(*msg.msg_iov))) |
5702196e DY |
464 | return -EFAULT; |
465 | sr->len = iomsg->fast_iov[0].iov_len; | |
466 | iomsg->free_iov = NULL; | |
467 | } | |
9bb66906 DY |
468 | |
469 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
470 | iomsg->namelen = msg.msg_namelen; | |
471 | iomsg->controllen = msg.msg_controllen; | |
472 | if (io_recvmsg_multishot_overflow(iomsg)) | |
473 | return -EOVERFLOW; | |
474 | } | |
f9ead18c JA |
475 | } else { |
476 | iomsg->free_iov = iomsg->fast_iov; | |
de4eda9d | 477 | ret = __import_iovec(ITER_DEST, msg.msg_iov, msg.msg_iovlen, UIO_FASTIOV, |
f9ead18c JA |
478 | &iomsg->free_iov, &iomsg->msg.msg_iter, |
479 | false); | |
480 | if (ret > 0) | |
481 | ret = 0; | |
482 | } | |
483 | ||
484 | return ret; | |
485 | } | |
486 | ||
487 | #ifdef CONFIG_COMPAT | |
488 | static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req, | |
489 | struct io_async_msghdr *iomsg) | |
490 | { | |
f2ccb5ae | 491 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
72c531f8 | 492 | struct compat_msghdr msg; |
f9ead18c | 493 | struct compat_iovec __user *uiov; |
f9ead18c JA |
494 | int ret; |
495 | ||
72c531f8 DY |
496 | if (copy_from_user(&msg, sr->umsg_compat, sizeof(msg))) |
497 | return -EFAULT; | |
498 | ||
4f6a94d3 | 499 | ret = __get_compat_msghdr(&iomsg->msg, &msg, &iomsg->uaddr); |
f9ead18c JA |
500 | if (ret) |
501 | return ret; | |
502 | ||
72c531f8 | 503 | uiov = compat_ptr(msg.msg_iov); |
f9ead18c JA |
504 | if (req->flags & REQ_F_BUFFER_SELECT) { |
505 | compat_ssize_t clen; | |
506 | ||
990a4de5 | 507 | iomsg->free_iov = NULL; |
72c531f8 | 508 | if (msg.msg_iovlen == 0) { |
6d2f75a0 | 509 | sr->len = 0; |
72c531f8 | 510 | } else if (msg.msg_iovlen > 1) { |
f9ead18c | 511 | return -EINVAL; |
6d2f75a0 DY |
512 | } else { |
513 | if (!access_ok(uiov, sizeof(*uiov))) | |
514 | return -EFAULT; | |
515 | if (__get_user(clen, &uiov->iov_len)) | |
516 | return -EFAULT; | |
517 | if (clen < 0) | |
518 | return -EINVAL; | |
519 | sr->len = clen; | |
6d2f75a0 | 520 | } |
9bb66906 DY |
521 | |
522 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
523 | iomsg->namelen = msg.msg_namelen; | |
524 | iomsg->controllen = msg.msg_controllen; | |
525 | if (io_recvmsg_multishot_overflow(iomsg)) | |
526 | return -EOVERFLOW; | |
527 | } | |
f9ead18c JA |
528 | } else { |
529 | iomsg->free_iov = iomsg->fast_iov; | |
de4eda9d | 530 | ret = __import_iovec(ITER_DEST, (struct iovec __user *)uiov, msg.msg_iovlen, |
f9ead18c JA |
531 | UIO_FASTIOV, &iomsg->free_iov, |
532 | &iomsg->msg.msg_iter, true); | |
533 | if (ret < 0) | |
534 | return ret; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | #endif | |
540 | ||
541 | static int io_recvmsg_copy_hdr(struct io_kiocb *req, | |
542 | struct io_async_msghdr *iomsg) | |
543 | { | |
544 | iomsg->msg.msg_name = &iomsg->addr; | |
545 | ||
546 | #ifdef CONFIG_COMPAT | |
547 | if (req->ctx->compat) | |
548 | return __io_compat_recvmsg_copy_hdr(req, iomsg); | |
549 | #endif | |
550 | ||
551 | return __io_recvmsg_copy_hdr(req, iomsg); | |
552 | } | |
553 | ||
554 | int io_recvmsg_prep_async(struct io_kiocb *req) | |
555 | { | |
556 | int ret; | |
557 | ||
858c293e PB |
558 | if (!io_msg_alloc_async_prep(req)) |
559 | return -ENOMEM; | |
f9ead18c JA |
560 | ret = io_recvmsg_copy_hdr(req, req->async_data); |
561 | if (!ret) | |
562 | req->flags |= REQ_F_NEED_CLEANUP; | |
563 | return ret; | |
564 | } | |
565 | ||
b3fdea6e DY |
566 | #define RECVMSG_FLAGS (IORING_RECVSEND_POLL_FIRST | IORING_RECV_MULTISHOT) |
567 | ||
f9ead18c JA |
568 | int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
569 | { | |
f2ccb5ae | 570 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
571 | |
572 | if (unlikely(sqe->file_index || sqe->addr2)) | |
573 | return -EINVAL; | |
574 | ||
575 | sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
576 | sr->len = READ_ONCE(sqe->len); | |
577 | sr->flags = READ_ONCE(sqe->ioprio); | |
b3fdea6e | 578 | if (sr->flags & ~(RECVMSG_FLAGS)) |
f9ead18c | 579 | return -EINVAL; |
7605c43d | 580 | sr->msg_flags = READ_ONCE(sqe->msg_flags); |
f9ead18c JA |
581 | if (sr->msg_flags & MSG_DONTWAIT) |
582 | req->flags |= REQ_F_NOWAIT; | |
583 | if (sr->msg_flags & MSG_ERRQUEUE) | |
584 | req->flags |= REQ_F_CLEAR_POLLIN; | |
b3fdea6e DY |
585 | if (sr->flags & IORING_RECV_MULTISHOT) { |
586 | if (!(req->flags & REQ_F_BUFFER_SELECT)) | |
587 | return -EINVAL; | |
588 | if (sr->msg_flags & MSG_WAITALL) | |
589 | return -EINVAL; | |
590 | if (req->opcode == IORING_OP_RECV && sr->len) | |
591 | return -EINVAL; | |
592 | req->flags |= REQ_F_APOLL_MULTISHOT; | |
b00c51ef JA |
593 | /* |
594 | * Store the buffer group for this multishot receive separately, | |
595 | * as if we end up doing an io-wq based issue that selects a | |
596 | * buffer, it has to be committed immediately and that will | |
597 | * clear ->buf_list. This means we lose the link to the buffer | |
598 | * list, and the eventual buffer put on completion then cannot | |
599 | * restore it. | |
600 | */ | |
601 | sr->buf_group = req->buf_index; | |
b3fdea6e | 602 | } |
f9ead18c JA |
603 | |
604 | #ifdef CONFIG_COMPAT | |
605 | if (req->ctx->compat) | |
606 | sr->msg_flags |= MSG_CMSG_COMPAT; | |
607 | #endif | |
608 | sr->done_io = 0; | |
609 | return 0; | |
610 | } | |
611 | ||
b3fdea6e DY |
612 | static inline void io_recv_prep_retry(struct io_kiocb *req) |
613 | { | |
f2ccb5ae | 614 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
b3fdea6e DY |
615 | |
616 | sr->done_io = 0; | |
617 | sr->len = 0; /* get from the provided buffer */ | |
b00c51ef | 618 | req->buf_index = sr->buf_group; |
b3fdea6e DY |
619 | } |
620 | ||
621 | /* | |
9bb66906 | 622 | * Finishes io_recv and io_recvmsg. |
b3fdea6e DY |
623 | * |
624 | * Returns true if it is actually finished, or false if it should run | |
625 | * again (for multishot). | |
626 | */ | |
9bb66906 | 627 | static inline bool io_recv_finish(struct io_kiocb *req, int *ret, |
7d41bcb7 | 628 | struct msghdr *msg, bool mshot_finished, |
100d6b17 | 629 | unsigned issue_flags) |
b3fdea6e | 630 | { |
7d41bcb7 JA |
631 | unsigned int cflags; |
632 | ||
633 | cflags = io_put_kbuf(req, issue_flags); | |
634 | if (msg->msg_inq && msg->msg_inq != -1U) | |
635 | cflags |= IORING_CQE_F_SOCK_NONEMPTY; | |
636 | ||
b3fdea6e DY |
637 | if (!(req->flags & REQ_F_APOLL_MULTISHOT)) { |
638 | io_req_set_res(req, *ret, cflags); | |
639 | *ret = IOU_OK; | |
640 | return true; | |
641 | } | |
642 | ||
9bb66906 | 643 | if (!mshot_finished) { |
d86eaed1 JA |
644 | if (io_aux_cqe(req, issue_flags & IO_URING_F_COMPLETE_DEFER, |
645 | *ret, cflags | IORING_CQE_F_MORE, true)) { | |
b3fdea6e | 646 | io_recv_prep_retry(req); |
a2741c58 JA |
647 | /* Known not-empty or unknown state, retry */ |
648 | if (cflags & IORING_CQE_F_SOCK_NONEMPTY || | |
649 | msg->msg_inq == -1U) | |
650 | return false; | |
651 | if (issue_flags & IO_URING_F_MULTISHOT) | |
652 | *ret = IOU_ISSUE_SKIP_COMPLETE; | |
653 | else | |
654 | *ret = -EAGAIN; | |
655 | return true; | |
b3fdea6e | 656 | } |
e2ad599d | 657 | /* Otherwise stop multishot but use the current result. */ |
b3fdea6e DY |
658 | } |
659 | ||
660 | io_req_set_res(req, *ret, cflags); | |
661 | ||
100d6b17 | 662 | if (issue_flags & IO_URING_F_MULTISHOT) |
b3fdea6e | 663 | *ret = IOU_STOP_MULTISHOT; |
e2df2ccb DY |
664 | else |
665 | *ret = IOU_OK; | |
b3fdea6e DY |
666 | return true; |
667 | } | |
668 | ||
9bb66906 DY |
669 | static int io_recvmsg_prep_multishot(struct io_async_msghdr *kmsg, |
670 | struct io_sr_msg *sr, void __user **buf, | |
671 | size_t *len) | |
672 | { | |
673 | unsigned long ubuf = (unsigned long) *buf; | |
674 | unsigned long hdr; | |
675 | ||
676 | hdr = sizeof(struct io_uring_recvmsg_out) + kmsg->namelen + | |
677 | kmsg->controllen; | |
678 | if (*len < hdr) | |
679 | return -EFAULT; | |
680 | ||
681 | if (kmsg->controllen) { | |
682 | unsigned long control = ubuf + hdr - kmsg->controllen; | |
683 | ||
d1f6222c | 684 | kmsg->msg.msg_control_user = (void __user *) control; |
9bb66906 DY |
685 | kmsg->msg.msg_controllen = kmsg->controllen; |
686 | } | |
687 | ||
688 | sr->buf = *buf; /* stash for later copy */ | |
d1f6222c | 689 | *buf = (void __user *) (ubuf + hdr); |
9bb66906 DY |
690 | kmsg->payloadlen = *len = *len - hdr; |
691 | return 0; | |
692 | } | |
693 | ||
694 | struct io_recvmsg_multishot_hdr { | |
695 | struct io_uring_recvmsg_out msg; | |
696 | struct sockaddr_storage addr; | |
697 | }; | |
698 | ||
699 | static int io_recvmsg_multishot(struct socket *sock, struct io_sr_msg *io, | |
700 | struct io_async_msghdr *kmsg, | |
701 | unsigned int flags, bool *finished) | |
702 | { | |
703 | int err; | |
704 | int copy_len; | |
705 | struct io_recvmsg_multishot_hdr hdr; | |
706 | ||
707 | if (kmsg->namelen) | |
708 | kmsg->msg.msg_name = &hdr.addr; | |
709 | kmsg->msg.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
710 | kmsg->msg.msg_namelen = 0; | |
711 | ||
712 | if (sock->file->f_flags & O_NONBLOCK) | |
713 | flags |= MSG_DONTWAIT; | |
714 | ||
715 | err = sock_recvmsg(sock, &kmsg->msg, flags); | |
716 | *finished = err <= 0; | |
717 | if (err < 0) | |
718 | return err; | |
719 | ||
720 | hdr.msg = (struct io_uring_recvmsg_out) { | |
721 | .controllen = kmsg->controllen - kmsg->msg.msg_controllen, | |
722 | .flags = kmsg->msg.msg_flags & ~MSG_CMSG_COMPAT | |
723 | }; | |
724 | ||
725 | hdr.msg.payloadlen = err; | |
726 | if (err > kmsg->payloadlen) | |
727 | err = kmsg->payloadlen; | |
728 | ||
729 | copy_len = sizeof(struct io_uring_recvmsg_out); | |
730 | if (kmsg->msg.msg_namelen > kmsg->namelen) | |
731 | copy_len += kmsg->namelen; | |
732 | else | |
733 | copy_len += kmsg->msg.msg_namelen; | |
734 | ||
735 | /* | |
736 | * "fromlen shall refer to the value before truncation.." | |
737 | * 1003.1g | |
738 | */ | |
739 | hdr.msg.namelen = kmsg->msg.msg_namelen; | |
740 | ||
741 | /* ensure that there is no gap between hdr and sockaddr_storage */ | |
742 | BUILD_BUG_ON(offsetof(struct io_recvmsg_multishot_hdr, addr) != | |
743 | sizeof(struct io_uring_recvmsg_out)); | |
744 | if (copy_to_user(io->buf, &hdr, copy_len)) { | |
745 | *finished = true; | |
746 | return -EFAULT; | |
747 | } | |
748 | ||
749 | return sizeof(struct io_uring_recvmsg_out) + kmsg->namelen + | |
750 | kmsg->controllen + err; | |
751 | } | |
752 | ||
f9ead18c JA |
753 | int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) |
754 | { | |
f2ccb5ae | 755 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
756 | struct io_async_msghdr iomsg, *kmsg; |
757 | struct socket *sock; | |
f9ead18c JA |
758 | unsigned flags; |
759 | int ret, min_ret = 0; | |
760 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
9bb66906 | 761 | bool mshot_finished = true; |
f9ead18c JA |
762 | |
763 | sock = sock_from_file(req->file); | |
764 | if (unlikely(!sock)) | |
765 | return -ENOTSOCK; | |
766 | ||
767 | if (req_has_async_data(req)) { | |
768 | kmsg = req->async_data; | |
769 | } else { | |
770 | ret = io_recvmsg_copy_hdr(req, &iomsg); | |
771 | if (ret) | |
772 | return ret; | |
773 | kmsg = &iomsg; | |
774 | } | |
775 | ||
776 | if (!(req->flags & REQ_F_POLLED) && | |
777 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
43e0bbbd | 778 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 779 | |
17add5ce PB |
780 | if (!io_check_multishot(req, issue_flags)) |
781 | return io_setup_async_msg(req, kmsg, issue_flags); | |
782 | ||
9bb66906 | 783 | retry_multishot: |
f9ead18c JA |
784 | if (io_do_buffer_select(req)) { |
785 | void __user *buf; | |
9bb66906 | 786 | size_t len = sr->len; |
f9ead18c | 787 | |
9bb66906 | 788 | buf = io_buffer_select(req, &len, issue_flags); |
f9ead18c JA |
789 | if (!buf) |
790 | return -ENOBUFS; | |
9bb66906 DY |
791 | |
792 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
793 | ret = io_recvmsg_prep_multishot(kmsg, sr, &buf, &len); | |
794 | if (ret) { | |
795 | io_kbuf_recycle(req, issue_flags); | |
796 | return ret; | |
797 | } | |
798 | } | |
799 | ||
4b61152e | 800 | iov_iter_ubuf(&kmsg->msg.msg_iter, ITER_DEST, buf, len); |
f9ead18c JA |
801 | } |
802 | ||
803 | flags = sr->msg_flags; | |
804 | if (force_nonblock) | |
805 | flags |= MSG_DONTWAIT; | |
f9ead18c JA |
806 | |
807 | kmsg->msg.msg_get_inq = 1; | |
88fc8b84 | 808 | kmsg->msg.msg_inq = -1U; |
78d0d206 | 809 | if (req->flags & REQ_F_APOLL_MULTISHOT) { |
9bb66906 DY |
810 | ret = io_recvmsg_multishot(sock, sr, kmsg, flags, |
811 | &mshot_finished); | |
78d0d206 JA |
812 | } else { |
813 | /* disable partial retry for recvmsg with cmsg attached */ | |
814 | if (flags & MSG_WAITALL && !kmsg->msg.msg_controllen) | |
815 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
816 | ||
9bb66906 DY |
817 | ret = __sys_recvmsg_sock(sock, &kmsg->msg, sr->umsg, |
818 | kmsg->uaddr, flags); | |
78d0d206 | 819 | } |
9bb66906 | 820 | |
f9ead18c | 821 | if (ret < min_ret) { |
9bb66906 DY |
822 | if (ret == -EAGAIN && force_nonblock) { |
823 | ret = io_setup_async_msg(req, kmsg, issue_flags); | |
100d6b17 | 824 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_MULTISHOT)) { |
9bb66906 DY |
825 | io_kbuf_recycle(req, issue_flags); |
826 | return IOU_ISSUE_SKIP_COMPLETE; | |
827 | } | |
828 | return ret; | |
829 | } | |
f9ead18c JA |
830 | if (ret > 0 && io_net_retry(sock, flags)) { |
831 | sr->done_io += ret; | |
832 | req->flags |= REQ_F_PARTIAL_IO; | |
43e0bbbd | 833 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 834 | } |
95eafc74 PB |
835 | if (ret == -ERESTARTSYS) |
836 | ret = -EINTR; | |
f9ead18c JA |
837 | req_set_fail(req); |
838 | } else if ((flags & MSG_WAITALL) && (kmsg->msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { | |
839 | req_set_fail(req); | |
840 | } | |
841 | ||
d4e097da | 842 | if (ret > 0) |
f9ead18c JA |
843 | ret += sr->done_io; |
844 | else if (sr->done_io) | |
845 | ret = sr->done_io; | |
d4e097da DY |
846 | else |
847 | io_kbuf_recycle(req, issue_flags); | |
848 | ||
7d41bcb7 | 849 | if (!io_recv_finish(req, &ret, &kmsg->msg, mshot_finished, issue_flags)) |
9bb66906 DY |
850 | goto retry_multishot; |
851 | ||
852 | if (mshot_finished) { | |
9bb66906 DY |
853 | /* fast path, check for non-NULL to avoid function call */ |
854 | if (kmsg->free_iov) | |
855 | kfree(kmsg->free_iov); | |
6c3e8955 | 856 | io_netmsg_recycle(req, issue_flags); |
9bb66906 DY |
857 | req->flags &= ~REQ_F_NEED_CLEANUP; |
858 | } | |
859 | ||
860 | return ret; | |
f9ead18c JA |
861 | } |
862 | ||
863 | int io_recv(struct io_kiocb *req, unsigned int issue_flags) | |
864 | { | |
f2ccb5ae | 865 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
866 | struct msghdr msg; |
867 | struct socket *sock; | |
f9ead18c JA |
868 | unsigned flags; |
869 | int ret, min_ret = 0; | |
870 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
b3fdea6e | 871 | size_t len = sr->len; |
f9ead18c JA |
872 | |
873 | if (!(req->flags & REQ_F_POLLED) && | |
874 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
875 | return -EAGAIN; | |
876 | ||
17add5ce PB |
877 | if (!io_check_multishot(req, issue_flags)) |
878 | return -EAGAIN; | |
879 | ||
f9ead18c JA |
880 | sock = sock_from_file(req->file); |
881 | if (unlikely(!sock)) | |
882 | return -ENOTSOCK; | |
883 | ||
bf34e697 JA |
884 | msg.msg_name = NULL; |
885 | msg.msg_namelen = 0; | |
886 | msg.msg_control = NULL; | |
887 | msg.msg_get_inq = 1; | |
888 | msg.msg_controllen = 0; | |
889 | msg.msg_iocb = NULL; | |
890 | msg.msg_ubuf = NULL; | |
891 | ||
b3fdea6e | 892 | retry_multishot: |
f9ead18c JA |
893 | if (io_do_buffer_select(req)) { |
894 | void __user *buf; | |
895 | ||
b3fdea6e | 896 | buf = io_buffer_select(req, &len, issue_flags); |
f9ead18c JA |
897 | if (!buf) |
898 | return -ENOBUFS; | |
899 | sr->buf = buf; | |
900 | } | |
901 | ||
4b61152e | 902 | ret = import_ubuf(ITER_DEST, sr->buf, len, &msg.msg_iter); |
f9ead18c JA |
903 | if (unlikely(ret)) |
904 | goto out_free; | |
905 | ||
88fc8b84 | 906 | msg.msg_inq = -1U; |
f9ead18c | 907 | msg.msg_flags = 0; |
f9ead18c JA |
908 | |
909 | flags = sr->msg_flags; | |
910 | if (force_nonblock) | |
911 | flags |= MSG_DONTWAIT; | |
912 | if (flags & MSG_WAITALL) | |
913 | min_ret = iov_iter_count(&msg.msg_iter); | |
914 | ||
915 | ret = sock_recvmsg(sock, &msg, flags); | |
916 | if (ret < min_ret) { | |
b3fdea6e | 917 | if (ret == -EAGAIN && force_nonblock) { |
100d6b17 | 918 | if (issue_flags & IO_URING_F_MULTISHOT) { |
b3fdea6e DY |
919 | io_kbuf_recycle(req, issue_flags); |
920 | return IOU_ISSUE_SKIP_COMPLETE; | |
921 | } | |
922 | ||
f9ead18c | 923 | return -EAGAIN; |
b3fdea6e | 924 | } |
f9ead18c JA |
925 | if (ret > 0 && io_net_retry(sock, flags)) { |
926 | sr->len -= ret; | |
927 | sr->buf += ret; | |
928 | sr->done_io += ret; | |
929 | req->flags |= REQ_F_PARTIAL_IO; | |
930 | return -EAGAIN; | |
931 | } | |
95eafc74 PB |
932 | if (ret == -ERESTARTSYS) |
933 | ret = -EINTR; | |
f9ead18c JA |
934 | req_set_fail(req); |
935 | } else if ((flags & MSG_WAITALL) && (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { | |
936 | out_free: | |
937 | req_set_fail(req); | |
938 | } | |
939 | ||
d4e097da | 940 | if (ret > 0) |
f9ead18c JA |
941 | ret += sr->done_io; |
942 | else if (sr->done_io) | |
943 | ret = sr->done_io; | |
d4e097da DY |
944 | else |
945 | io_kbuf_recycle(req, issue_flags); | |
946 | ||
7d41bcb7 | 947 | if (!io_recv_finish(req, &ret, &msg, ret <= 0, issue_flags)) |
b3fdea6e DY |
948 | goto retry_multishot; |
949 | ||
950 | return ret; | |
f9ead18c JA |
951 | } |
952 | ||
b0e9b551 | 953 | void io_send_zc_cleanup(struct io_kiocb *req) |
b48c312b | 954 | { |
ac9e5784 | 955 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
493108d9 | 956 | struct io_async_msghdr *io; |
b48c312b | 957 | |
493108d9 PB |
958 | if (req_has_async_data(req)) { |
959 | io = req->async_data; | |
4c17a496 PB |
960 | /* might be ->fast_iov if *msg_copy_hdr failed */ |
961 | if (io->free_iov != io->fast_iov) | |
962 | kfree(io->free_iov); | |
493108d9 | 963 | } |
a75155fa | 964 | if (zc->notif) { |
a75155fa PB |
965 | io_notif_flush(zc->notif); |
966 | zc->notif = NULL; | |
967 | } | |
b48c312b PB |
968 | } |
969 | ||
40725d1b PB |
970 | #define IO_ZC_FLAGS_COMMON (IORING_RECVSEND_POLL_FIRST | IORING_RECVSEND_FIXED_BUF) |
971 | #define IO_ZC_FLAGS_VALID (IO_ZC_FLAGS_COMMON | IORING_SEND_ZC_REPORT_USAGE) | |
972 | ||
b0e9b551 | 973 | int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
06a5464b | 974 | { |
ac9e5784 | 975 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
10c7d33e | 976 | struct io_ring_ctx *ctx = req->ctx; |
b48c312b | 977 | struct io_kiocb *notif; |
06a5464b | 978 | |
493108d9 | 979 | if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3))) |
b48c312b PB |
980 | return -EINVAL; |
981 | /* we don't support IOSQE_CQE_SKIP_SUCCESS just yet */ | |
982 | if (req->flags & REQ_F_CQE_SKIP) | |
06a5464b PB |
983 | return -EINVAL; |
984 | ||
e3366e02 PB |
985 | notif = zc->notif = io_alloc_notif(ctx); |
986 | if (!notif) | |
987 | return -ENOMEM; | |
988 | notif->cqe.user_data = req->cqe.user_data; | |
989 | notif->cqe.res = 0; | |
990 | notif->cqe.flags = IORING_CQE_F_NOTIF; | |
991 | req->flags |= REQ_F_NEED_CLEANUP; | |
40725d1b PB |
992 | |
993 | zc->flags = READ_ONCE(sqe->ioprio); | |
994 | if (unlikely(zc->flags & ~IO_ZC_FLAGS_COMMON)) { | |
995 | if (zc->flags & ~IO_ZC_FLAGS_VALID) | |
996 | return -EINVAL; | |
997 | if (zc->flags & IORING_SEND_ZC_REPORT_USAGE) { | |
998 | io_notif_set_extended(notif); | |
999 | io_notif_to_data(notif)->zc_report = true; | |
1000 | } | |
1001 | } | |
1002 | ||
10c7d33e PB |
1003 | if (zc->flags & IORING_RECVSEND_FIXED_BUF) { |
1004 | unsigned idx = READ_ONCE(sqe->buf_index); | |
1005 | ||
1006 | if (unlikely(idx >= ctx->nr_user_bufs)) | |
1007 | return -EFAULT; | |
1008 | idx = array_index_nospec(idx, ctx->nr_user_bufs); | |
1009 | req->imu = READ_ONCE(ctx->user_bufs[idx]); | |
e3366e02 | 1010 | io_req_set_rsrc_node(notif, ctx, 0); |
10c7d33e | 1011 | } |
06a5464b | 1012 | |
493108d9 PB |
1013 | if (req->opcode == IORING_OP_SEND_ZC) { |
1014 | if (READ_ONCE(sqe->__pad3[0])) | |
1015 | return -EINVAL; | |
1016 | zc->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
1017 | zc->addr_len = READ_ONCE(sqe->addr_len); | |
1018 | } else { | |
1019 | if (unlikely(sqe->addr2 || sqe->file_index)) | |
1020 | return -EINVAL; | |
1021 | if (unlikely(zc->flags & IORING_RECVSEND_FIXED_BUF)) | |
1022 | return -EINVAL; | |
1023 | } | |
1024 | ||
06a5464b PB |
1025 | zc->buf = u64_to_user_ptr(READ_ONCE(sqe->addr)); |
1026 | zc->len = READ_ONCE(sqe->len); | |
1027 | zc->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
06a5464b PB |
1028 | if (zc->msg_flags & MSG_DONTWAIT) |
1029 | req->flags |= REQ_F_NOWAIT; | |
092aeedb | 1030 | |
4a933e62 | 1031 | zc->done_io = 0; |
092aeedb | 1032 | |
06a5464b PB |
1033 | #ifdef CONFIG_COMPAT |
1034 | if (req->ctx->compat) | |
1035 | zc->msg_flags |= MSG_CMSG_COMPAT; | |
1036 | #endif | |
1037 | return 0; | |
1038 | } | |
1039 | ||
cd9021e8 PB |
1040 | static int io_sg_from_iter_iovec(struct sock *sk, struct sk_buff *skb, |
1041 | struct iov_iter *from, size_t length) | |
1042 | { | |
1043 | skb_zcopy_downgrade_managed(skb); | |
1044 | return __zerocopy_sg_from_iter(NULL, sk, skb, from, length); | |
1045 | } | |
1046 | ||
3ff1a0d3 PB |
1047 | static int io_sg_from_iter(struct sock *sk, struct sk_buff *skb, |
1048 | struct iov_iter *from, size_t length) | |
1049 | { | |
1050 | struct skb_shared_info *shinfo = skb_shinfo(skb); | |
1051 | int frag = shinfo->nr_frags; | |
1052 | int ret = 0; | |
1053 | struct bvec_iter bi; | |
1054 | ssize_t copied = 0; | |
1055 | unsigned long truesize = 0; | |
1056 | ||
cd9021e8 | 1057 | if (!frag) |
3ff1a0d3 | 1058 | shinfo->flags |= SKBFL_MANAGED_FRAG_REFS; |
cd9021e8 | 1059 | else if (unlikely(!skb_zcopy_managed(skb))) |
3ff1a0d3 | 1060 | return __zerocopy_sg_from_iter(NULL, sk, skb, from, length); |
3ff1a0d3 PB |
1061 | |
1062 | bi.bi_size = min(from->count, length); | |
1063 | bi.bi_bvec_done = from->iov_offset; | |
1064 | bi.bi_idx = 0; | |
1065 | ||
1066 | while (bi.bi_size && frag < MAX_SKB_FRAGS) { | |
1067 | struct bio_vec v = mp_bvec_iter_bvec(from->bvec, bi); | |
1068 | ||
1069 | copied += v.bv_len; | |
1070 | truesize += PAGE_ALIGN(v.bv_len + v.bv_offset); | |
1071 | __skb_fill_page_desc_noacc(shinfo, frag++, v.bv_page, | |
1072 | v.bv_offset, v.bv_len); | |
1073 | bvec_iter_advance_single(from->bvec, &bi, v.bv_len); | |
1074 | } | |
1075 | if (bi.bi_size) | |
1076 | ret = -EMSGSIZE; | |
1077 | ||
1078 | shinfo->nr_frags = frag; | |
1079 | from->bvec += bi.bi_idx; | |
1080 | from->nr_segs -= bi.bi_idx; | |
dfb58b17 | 1081 | from->count -= copied; |
3ff1a0d3 PB |
1082 | from->iov_offset = bi.bi_bvec_done; |
1083 | ||
1084 | skb->data_len += copied; | |
1085 | skb->len += copied; | |
1086 | skb->truesize += truesize; | |
1087 | ||
1088 | if (sk && sk->sk_type == SOCK_STREAM) { | |
1089 | sk_wmem_queued_add(sk, truesize); | |
1090 | if (!skb_zcopy_pure(skb)) | |
1091 | sk_mem_charge(sk, truesize); | |
1092 | } else { | |
1093 | refcount_add(truesize, &skb->sk->sk_wmem_alloc); | |
1094 | } | |
1095 | return ret; | |
1096 | } | |
1097 | ||
b0e9b551 | 1098 | int io_send_zc(struct io_kiocb *req, unsigned int issue_flags) |
06a5464b | 1099 | { |
6ae61b7a | 1100 | struct sockaddr_storage __address; |
ac9e5784 | 1101 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
06a5464b | 1102 | struct msghdr msg; |
06a5464b | 1103 | struct socket *sock; |
6ae91ac9 | 1104 | unsigned msg_flags; |
06a5464b PB |
1105 | int ret, min_ret = 0; |
1106 | ||
06a5464b PB |
1107 | sock = sock_from_file(req->file); |
1108 | if (unlikely(!sock)) | |
1109 | return -ENOTSOCK; | |
edf81438 PB |
1110 | if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) |
1111 | return -EOPNOTSUPP; | |
06a5464b | 1112 | |
06a5464b PB |
1113 | msg.msg_name = NULL; |
1114 | msg.msg_control = NULL; | |
1115 | msg.msg_controllen = 0; | |
1116 | msg.msg_namelen = 0; | |
1117 | ||
86dc8f23 | 1118 | if (zc->addr) { |
581711c4 PB |
1119 | if (req_has_async_data(req)) { |
1120 | struct io_async_msghdr *io = req->async_data; | |
1121 | ||
6ae61b7a | 1122 | msg.msg_name = &io->addr; |
581711c4 PB |
1123 | } else { |
1124 | ret = move_addr_to_kernel(zc->addr, zc->addr_len, &__address); | |
1125 | if (unlikely(ret < 0)) | |
1126 | return ret; | |
1127 | msg.msg_name = (struct sockaddr *)&__address; | |
581711c4 | 1128 | } |
86dc8f23 PB |
1129 | msg.msg_namelen = zc->addr_len; |
1130 | } | |
1131 | ||
3c840053 PB |
1132 | if (!(req->flags & REQ_F_POLLED) && |
1133 | (zc->flags & IORING_RECVSEND_POLL_FIRST)) | |
6ae61b7a | 1134 | return io_setup_async_addr(req, &__address, issue_flags); |
3c840053 | 1135 | |
10c7d33e | 1136 | if (zc->flags & IORING_RECVSEND_FIXED_BUF) { |
de4eda9d | 1137 | ret = io_import_fixed(ITER_SOURCE, &msg.msg_iter, req->imu, |
10c7d33e PB |
1138 | (u64)(uintptr_t)zc->buf, zc->len); |
1139 | if (unlikely(ret)) | |
986e263d | 1140 | return ret; |
cd9021e8 | 1141 | msg.sg_from_iter = io_sg_from_iter; |
10c7d33e | 1142 | } else { |
42385b02 | 1143 | io_notif_set_extended(zc->notif); |
4b61152e | 1144 | ret = import_ubuf(ITER_SOURCE, zc->buf, zc->len, &msg.msg_iter); |
10c7d33e PB |
1145 | if (unlikely(ret)) |
1146 | return ret; | |
b48c312b | 1147 | ret = io_notif_account_mem(zc->notif, zc->len); |
2e32ba56 PB |
1148 | if (unlikely(ret)) |
1149 | return ret; | |
cd9021e8 | 1150 | msg.sg_from_iter = io_sg_from_iter_iovec; |
10c7d33e | 1151 | } |
06a5464b PB |
1152 | |
1153 | msg_flags = zc->msg_flags | MSG_ZEROCOPY; | |
1154 | if (issue_flags & IO_URING_F_NONBLOCK) | |
1155 | msg_flags |= MSG_DONTWAIT; | |
1156 | if (msg_flags & MSG_WAITALL) | |
1157 | min_ret = iov_iter_count(&msg.msg_iter); | |
b841b901 | 1158 | msg_flags &= ~MSG_INTERNAL_SENDMSG_FLAGS; |
06a5464b PB |
1159 | |
1160 | msg.msg_flags = msg_flags; | |
b48c312b | 1161 | msg.msg_ubuf = &io_notif_to_data(zc->notif)->uarg; |
06a5464b PB |
1162 | ret = sock_sendmsg(sock, &msg); |
1163 | ||
1164 | if (unlikely(ret < min_ret)) { | |
1165 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
6ae61b7a | 1166 | return io_setup_async_addr(req, &__address, issue_flags); |
581711c4 | 1167 | |
4a933e62 PB |
1168 | if (ret > 0 && io_net_retry(sock, msg.msg_flags)) { |
1169 | zc->len -= ret; | |
1170 | zc->buf += ret; | |
1171 | zc->done_io += ret; | |
1172 | req->flags |= REQ_F_PARTIAL_IO; | |
6ae61b7a | 1173 | return io_setup_async_addr(req, &__address, issue_flags); |
4a933e62 PB |
1174 | } |
1175 | if (ret == -ERESTARTSYS) | |
1176 | ret = -EINTR; | |
5a848b7c | 1177 | req_set_fail(req); |
06a5464b PB |
1178 | } |
1179 | ||
4a933e62 PB |
1180 | if (ret >= 0) |
1181 | ret += zc->done_io; | |
1182 | else if (zc->done_io) | |
1183 | ret = zc->done_io; | |
b48c312b | 1184 | |
108893dd PB |
1185 | /* |
1186 | * If we're in io-wq we can't rely on tw ordering guarantees, defer | |
1187 | * flushing notif to io_send_zc_cleanup() | |
1188 | */ | |
1189 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { | |
1190 | io_notif_flush(zc->notif); | |
1191 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
1192 | } | |
6ae91ac9 | 1193 | io_req_set_res(req, ret, IORING_CQE_F_MORE); |
06a5464b PB |
1194 | return IOU_OK; |
1195 | } | |
1196 | ||
493108d9 PB |
1197 | int io_sendmsg_zc(struct io_kiocb *req, unsigned int issue_flags) |
1198 | { | |
1199 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); | |
1200 | struct io_async_msghdr iomsg, *kmsg; | |
1201 | struct socket *sock; | |
6ae91ac9 | 1202 | unsigned flags; |
493108d9 PB |
1203 | int ret, min_ret = 0; |
1204 | ||
42385b02 PB |
1205 | io_notif_set_extended(sr->notif); |
1206 | ||
493108d9 PB |
1207 | sock = sock_from_file(req->file); |
1208 | if (unlikely(!sock)) | |
1209 | return -ENOTSOCK; | |
cc767e7c PB |
1210 | if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) |
1211 | return -EOPNOTSUPP; | |
493108d9 PB |
1212 | |
1213 | if (req_has_async_data(req)) { | |
1214 | kmsg = req->async_data; | |
1215 | } else { | |
1216 | ret = io_sendmsg_copy_hdr(req, &iomsg); | |
1217 | if (ret) | |
1218 | return ret; | |
1219 | kmsg = &iomsg; | |
1220 | } | |
1221 | ||
1222 | if (!(req->flags & REQ_F_POLLED) && | |
1223 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
1224 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1225 | ||
1226 | flags = sr->msg_flags | MSG_ZEROCOPY; | |
1227 | if (issue_flags & IO_URING_F_NONBLOCK) | |
1228 | flags |= MSG_DONTWAIT; | |
1229 | if (flags & MSG_WAITALL) | |
1230 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
1231 | ||
1232 | kmsg->msg.msg_ubuf = &io_notif_to_data(sr->notif)->uarg; | |
1233 | kmsg->msg.sg_from_iter = io_sg_from_iter_iovec; | |
1234 | ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); | |
1235 | ||
1236 | if (unlikely(ret < min_ret)) { | |
1237 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
1238 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1239 | ||
1240 | if (ret > 0 && io_net_retry(sock, flags)) { | |
1241 | sr->done_io += ret; | |
1242 | req->flags |= REQ_F_PARTIAL_IO; | |
1243 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1244 | } | |
493108d9 PB |
1245 | if (ret == -ERESTARTSYS) |
1246 | ret = -EINTR; | |
1247 | req_set_fail(req); | |
1248 | } | |
1249 | /* fast path, check for non-NULL to avoid function call */ | |
108893dd | 1250 | if (kmsg->free_iov) { |
493108d9 | 1251 | kfree(kmsg->free_iov); |
108893dd PB |
1252 | kmsg->free_iov = NULL; |
1253 | } | |
493108d9 PB |
1254 | |
1255 | io_netmsg_recycle(req, issue_flags); | |
1256 | if (ret >= 0) | |
1257 | ret += sr->done_io; | |
1258 | else if (sr->done_io) | |
1259 | ret = sr->done_io; | |
1260 | ||
108893dd PB |
1261 | /* |
1262 | * If we're in io-wq we can't rely on tw ordering guarantees, defer | |
1263 | * flushing notif to io_send_zc_cleanup() | |
1264 | */ | |
1265 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { | |
1266 | io_notif_flush(sr->notif); | |
1267 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
1268 | } | |
6ae91ac9 | 1269 | io_req_set_res(req, ret, IORING_CQE_F_MORE); |
493108d9 PB |
1270 | return IOU_OK; |
1271 | } | |
1272 | ||
7e6b638e PB |
1273 | void io_sendrecv_fail(struct io_kiocb *req) |
1274 | { | |
1275 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); | |
7e6b638e PB |
1276 | |
1277 | if (req->flags & REQ_F_PARTIAL_IO) | |
6ae91ac9 PB |
1278 | req->cqe.res = sr->done_io; |
1279 | ||
c4c0009e | 1280 | if ((req->flags & REQ_F_NEED_CLEANUP) && |
6ae91ac9 PB |
1281 | (req->opcode == IORING_OP_SEND_ZC || req->opcode == IORING_OP_SENDMSG_ZC)) |
1282 | req->cqe.flags |= IORING_CQE_F_MORE; | |
5693bcce PB |
1283 | } |
1284 | ||
f9ead18c JA |
1285 | int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
1286 | { | |
f2ccb5ae | 1287 | struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept); |
f9ead18c JA |
1288 | unsigned flags; |
1289 | ||
1290 | if (sqe->len || sqe->buf_index) | |
1291 | return -EINVAL; | |
1292 | ||
1293 | accept->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
1294 | accept->addr_len = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
1295 | accept->flags = READ_ONCE(sqe->accept_flags); | |
1296 | accept->nofile = rlimit(RLIMIT_NOFILE); | |
1297 | flags = READ_ONCE(sqe->ioprio); | |
1298 | if (flags & ~IORING_ACCEPT_MULTISHOT) | |
1299 | return -EINVAL; | |
1300 | ||
1301 | accept->file_slot = READ_ONCE(sqe->file_index); | |
1302 | if (accept->file_slot) { | |
1303 | if (accept->flags & SOCK_CLOEXEC) | |
1304 | return -EINVAL; | |
1305 | if (flags & IORING_ACCEPT_MULTISHOT && | |
1306 | accept->file_slot != IORING_FILE_INDEX_ALLOC) | |
1307 | return -EINVAL; | |
1308 | } | |
1309 | if (accept->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1310 | return -EINVAL; | |
1311 | if (SOCK_NONBLOCK != O_NONBLOCK && (accept->flags & SOCK_NONBLOCK)) | |
1312 | accept->flags = (accept->flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1313 | if (flags & IORING_ACCEPT_MULTISHOT) | |
1314 | req->flags |= REQ_F_APOLL_MULTISHOT; | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | int io_accept(struct io_kiocb *req, unsigned int issue_flags) | |
1319 | { | |
f2ccb5ae | 1320 | struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept); |
f9ead18c JA |
1321 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; |
1322 | unsigned int file_flags = force_nonblock ? O_NONBLOCK : 0; | |
1323 | bool fixed = !!accept->file_slot; | |
1324 | struct file *file; | |
1325 | int ret, fd; | |
1326 | ||
17add5ce PB |
1327 | if (!io_check_multishot(req, issue_flags)) |
1328 | return -EAGAIN; | |
f9ead18c JA |
1329 | retry: |
1330 | if (!fixed) { | |
1331 | fd = __get_unused_fd_flags(accept->flags, accept->nofile); | |
1332 | if (unlikely(fd < 0)) | |
1333 | return fd; | |
1334 | } | |
1335 | file = do_accept(req->file, file_flags, accept->addr, accept->addr_len, | |
1336 | accept->flags); | |
1337 | if (IS_ERR(file)) { | |
1338 | if (!fixed) | |
1339 | put_unused_fd(fd); | |
1340 | ret = PTR_ERR(file); | |
1341 | if (ret == -EAGAIN && force_nonblock) { | |
1342 | /* | |
1343 | * if it's multishot and polled, we don't need to | |
1344 | * return EAGAIN to arm the poll infra since it | |
1345 | * has already been done | |
1346 | */ | |
91482864 | 1347 | if (issue_flags & IO_URING_F_MULTISHOT) |
f9ead18c JA |
1348 | ret = IOU_ISSUE_SKIP_COMPLETE; |
1349 | return ret; | |
1350 | } | |
1351 | if (ret == -ERESTARTSYS) | |
1352 | ret = -EINTR; | |
1353 | req_set_fail(req); | |
1354 | } else if (!fixed) { | |
1355 | fd_install(fd, file); | |
1356 | ret = fd; | |
1357 | } else { | |
1358 | ret = io_fixed_fd_install(req, issue_flags, file, | |
1359 | accept->file_slot); | |
1360 | } | |
1361 | ||
1362 | if (!(req->flags & REQ_F_APOLL_MULTISHOT)) { | |
1363 | io_req_set_res(req, ret, 0); | |
1364 | return IOU_OK; | |
1365 | } | |
f9ead18c | 1366 | |
515e2696 DY |
1367 | if (ret < 0) |
1368 | return ret; | |
d86eaed1 JA |
1369 | if (io_aux_cqe(req, issue_flags & IO_URING_F_COMPLETE_DEFER, ret, |
1370 | IORING_CQE_F_MORE, true)) | |
d245bca6 | 1371 | goto retry; |
cbd25748 | 1372 | |
515e2696 | 1373 | return -ECANCELED; |
f9ead18c JA |
1374 | } |
1375 | ||
1376 | int io_socket_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
1377 | { | |
f2ccb5ae | 1378 | struct io_socket *sock = io_kiocb_to_cmd(req, struct io_socket); |
f9ead18c JA |
1379 | |
1380 | if (sqe->addr || sqe->rw_flags || sqe->buf_index) | |
1381 | return -EINVAL; | |
1382 | ||
1383 | sock->domain = READ_ONCE(sqe->fd); | |
1384 | sock->type = READ_ONCE(sqe->off); | |
1385 | sock->protocol = READ_ONCE(sqe->len); | |
1386 | sock->file_slot = READ_ONCE(sqe->file_index); | |
1387 | sock->nofile = rlimit(RLIMIT_NOFILE); | |
1388 | ||
1389 | sock->flags = sock->type & ~SOCK_TYPE_MASK; | |
1390 | if (sock->file_slot && (sock->flags & SOCK_CLOEXEC)) | |
1391 | return -EINVAL; | |
1392 | if (sock->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1393 | return -EINVAL; | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | int io_socket(struct io_kiocb *req, unsigned int issue_flags) | |
1398 | { | |
f2ccb5ae | 1399 | struct io_socket *sock = io_kiocb_to_cmd(req, struct io_socket); |
f9ead18c JA |
1400 | bool fixed = !!sock->file_slot; |
1401 | struct file *file; | |
1402 | int ret, fd; | |
1403 | ||
1404 | if (!fixed) { | |
1405 | fd = __get_unused_fd_flags(sock->flags, sock->nofile); | |
1406 | if (unlikely(fd < 0)) | |
1407 | return fd; | |
1408 | } | |
1409 | file = __sys_socket_file(sock->domain, sock->type, sock->protocol); | |
1410 | if (IS_ERR(file)) { | |
1411 | if (!fixed) | |
1412 | put_unused_fd(fd); | |
1413 | ret = PTR_ERR(file); | |
1414 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
1415 | return -EAGAIN; | |
1416 | if (ret == -ERESTARTSYS) | |
1417 | ret = -EINTR; | |
1418 | req_set_fail(req); | |
1419 | } else if (!fixed) { | |
1420 | fd_install(fd, file); | |
1421 | ret = fd; | |
1422 | } else { | |
1423 | ret = io_fixed_fd_install(req, issue_flags, file, | |
1424 | sock->file_slot); | |
1425 | } | |
1426 | io_req_set_res(req, ret, 0); | |
1427 | return IOU_OK; | |
1428 | } | |
1429 | ||
1430 | int io_connect_prep_async(struct io_kiocb *req) | |
1431 | { | |
1432 | struct io_async_connect *io = req->async_data; | |
f2ccb5ae | 1433 | struct io_connect *conn = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1434 | |
1435 | return move_addr_to_kernel(conn->addr, conn->addr_len, &io->address); | |
1436 | } | |
1437 | ||
1438 | int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
1439 | { | |
f2ccb5ae | 1440 | struct io_connect *conn = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1441 | |
1442 | if (sqe->len || sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in) | |
1443 | return -EINVAL; | |
1444 | ||
1445 | conn->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
1446 | conn->addr_len = READ_ONCE(sqe->addr2); | |
74e2e17e | 1447 | conn->in_progress = conn->seen_econnaborted = false; |
f9ead18c JA |
1448 | return 0; |
1449 | } | |
1450 | ||
1451 | int io_connect(struct io_kiocb *req, unsigned int issue_flags) | |
1452 | { | |
f2ccb5ae | 1453 | struct io_connect *connect = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1454 | struct io_async_connect __io, *io; |
1455 | unsigned file_flags; | |
1456 | int ret; | |
1457 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
1458 | ||
3fb1bd68 JA |
1459 | if (connect->in_progress) { |
1460 | struct socket *socket; | |
1461 | ||
1462 | ret = -ENOTSOCK; | |
1463 | socket = sock_from_file(req->file); | |
1464 | if (socket) | |
1465 | ret = sock_error(socket->sk); | |
1466 | goto out; | |
1467 | } | |
1468 | ||
f9ead18c JA |
1469 | if (req_has_async_data(req)) { |
1470 | io = req->async_data; | |
1471 | } else { | |
1472 | ret = move_addr_to_kernel(connect->addr, | |
1473 | connect->addr_len, | |
1474 | &__io.address); | |
1475 | if (ret) | |
1476 | goto out; | |
1477 | io = &__io; | |
1478 | } | |
1479 | ||
1480 | file_flags = force_nonblock ? O_NONBLOCK : 0; | |
1481 | ||
1482 | ret = __sys_connect_file(req->file, &io->address, | |
1483 | connect->addr_len, file_flags); | |
74e2e17e JA |
1484 | if ((ret == -EAGAIN || ret == -EINPROGRESS || ret == -ECONNABORTED) |
1485 | && force_nonblock) { | |
3fb1bd68 JA |
1486 | if (ret == -EINPROGRESS) { |
1487 | connect->in_progress = true; | |
74e2e17e JA |
1488 | return -EAGAIN; |
1489 | } | |
1490 | if (ret == -ECONNABORTED) { | |
1491 | if (connect->seen_econnaborted) | |
3fb1bd68 | 1492 | goto out; |
74e2e17e JA |
1493 | connect->seen_econnaborted = true; |
1494 | } | |
1495 | if (req_has_async_data(req)) | |
1496 | return -EAGAIN; | |
1497 | if (io_alloc_async_data(req)) { | |
1498 | ret = -ENOMEM; | |
1499 | goto out; | |
f9ead18c | 1500 | } |
74e2e17e | 1501 | memcpy(req->async_data, &__io, sizeof(__io)); |
f9ead18c JA |
1502 | return -EAGAIN; |
1503 | } | |
1504 | if (ret == -ERESTARTSYS) | |
1505 | ret = -EINTR; | |
1506 | out: | |
1507 | if (ret < 0) | |
1508 | req_set_fail(req); | |
1509 | io_req_set_res(req, ret, 0); | |
1510 | return IOU_OK; | |
1511 | } | |
43e0bbbd JA |
1512 | |
1513 | void io_netmsg_cache_free(struct io_cache_entry *entry) | |
1514 | { | |
1515 | kfree(container_of(entry, struct io_async_msghdr, cache)); | |
1516 | } | |
f9ead18c | 1517 | #endif |