Commit | Line | Data |
---|---|---|
639b321b | 1 | /* |
eee2fa6a | 2 | * Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved. |
639b321b AG |
3 | * |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | */ | |
33 | #include <linux/module.h> | |
34 | #include <linux/errno.h> | |
35 | #include <linux/kernel.h> | |
5a0e3ad6 | 36 | #include <linux/gfp.h> |
639b321b | 37 | #include <linux/in.h> |
eee2fa6a | 38 | #include <linux/ipv6.h> |
639b321b | 39 | #include <linux/poll.h> |
639b321b AG |
40 | #include <net/sock.h> |
41 | ||
42 | #include "rds.h" | |
639b321b AG |
43 | |
44 | /* this is just used for stats gathering :/ */ | |
45 | static DEFINE_SPINLOCK(rds_sock_lock); | |
46 | static unsigned long rds_sock_count; | |
47 | static LIST_HEAD(rds_sock_list); | |
48 | DECLARE_WAIT_QUEUE_HEAD(rds_poll_waitq); | |
49 | ||
50 | /* | |
51 | * This is called as the final descriptor referencing this socket is closed. | |
52 | * We have to unbind the socket so that another socket can be bound to the | |
53 | * address it was using. | |
54 | * | |
55 | * We have to be careful about racing with the incoming path. sock_orphan() | |
56 | * sets SOCK_DEAD and we use that as an indicator to the rx path that new | |
57 | * messages shouldn't be queued. | |
58 | */ | |
59 | static int rds_release(struct socket *sock) | |
60 | { | |
61 | struct sock *sk = sock->sk; | |
62 | struct rds_sock *rs; | |
639b321b | 63 | |
8690bfa1 | 64 | if (!sk) |
639b321b AG |
65 | goto out; |
66 | ||
67 | rs = rds_sk_to_rs(sk); | |
68 | ||
69 | sock_orphan(sk); | |
70 | /* Note - rds_clear_recv_queue grabs rs_recv_lock, so | |
71 | * that ensures the recv path has completed messing | |
72 | * with the socket. */ | |
73 | rds_clear_recv_queue(rs); | |
74 | rds_cong_remove_socket(rs); | |
38a4e5e6 | 75 | |
639b321b | 76 | rds_remove_bound(rs); |
38a4e5e6 | 77 | |
639b321b AG |
78 | rds_send_drop_to(rs, NULL); |
79 | rds_rdma_drop_keys(rs); | |
80 | rds_notify_queue_get(rs, NULL); | |
9426bbc6 | 81 | rds_notify_msg_zcopy_purge(&rs->rs_zcookie_queue); |
639b321b | 82 | |
efc3dbc3 | 83 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
84 | list_del_init(&rs->rs_item); |
85 | rds_sock_count--; | |
efc3dbc3 | 86 | spin_unlock_bh(&rds_sock_lock); |
639b321b | 87 | |
5adb5bc6 ZB |
88 | rds_trans_put(rs->rs_transport); |
89 | ||
639b321b AG |
90 | sock->sk = NULL; |
91 | sock_put(sk); | |
92 | out: | |
93 | return 0; | |
94 | } | |
95 | ||
96 | /* | |
97 | * Careful not to race with rds_release -> sock_orphan which clears sk_sleep. | |
98 | * _bh() isn't OK here, we're called from interrupt handlers. It's probably OK | |
99 | * to wake the waitqueue after sk_sleep is clear as we hold a sock ref, but | |
100 | * this seems more conservative. | |
101 | * NB - normally, one would use sk_callback_lock for this, but we can | |
102 | * get here from interrupts, whereas the network code grabs sk_callback_lock | |
103 | * with _lock_bh only - so relying on sk_callback_lock introduces livelocks. | |
104 | */ | |
105 | void rds_wake_sk_sleep(struct rds_sock *rs) | |
106 | { | |
107 | unsigned long flags; | |
108 | ||
109 | read_lock_irqsave(&rs->rs_recv_lock, flags); | |
110 | __rds_wake_sk_sleep(rds_rs_to_sk(rs)); | |
111 | read_unlock_irqrestore(&rs->rs_recv_lock, flags); | |
112 | } | |
113 | ||
114 | static int rds_getname(struct socket *sock, struct sockaddr *uaddr, | |
9b2c45d4 | 115 | int peer) |
639b321b | 116 | { |
639b321b | 117 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); |
eee2fa6a KCP |
118 | struct sockaddr_in6 *sin6; |
119 | struct sockaddr_in *sin; | |
120 | int uaddr_len; | |
639b321b AG |
121 | |
122 | /* racey, don't care */ | |
123 | if (peer) { | |
eee2fa6a | 124 | if (ipv6_addr_any(&rs->rs_conn_addr)) |
639b321b AG |
125 | return -ENOTCONN; |
126 | ||
eee2fa6a KCP |
127 | if (ipv6_addr_v4mapped(&rs->rs_conn_addr)) { |
128 | sin = (struct sockaddr_in *)uaddr; | |
129 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
130 | sin->sin_family = AF_INET; | |
131 | sin->sin_port = rs->rs_conn_port; | |
132 | sin->sin_addr.s_addr = rs->rs_conn_addr_v4; | |
133 | uaddr_len = sizeof(*sin); | |
134 | } else { | |
135 | sin6 = (struct sockaddr_in6 *)uaddr; | |
136 | sin6->sin6_family = AF_INET6; | |
137 | sin6->sin6_port = rs->rs_conn_port; | |
138 | sin6->sin6_addr = rs->rs_conn_addr; | |
139 | sin6->sin6_flowinfo = 0; | |
140 | /* scope_id is the same as in the bound address. */ | |
141 | sin6->sin6_scope_id = rs->rs_bound_scope_id; | |
142 | uaddr_len = sizeof(*sin6); | |
143 | } | |
639b321b | 144 | } else { |
1e2b44e7 KCP |
145 | /* If socket is not yet bound and the socket is connected, |
146 | * set the return address family to be the same as the | |
147 | * connected address, but with 0 address value. If it is not | |
148 | * connected, set the family to be AF_UNSPEC (value 0) and | |
149 | * the address size to be that of an IPv4 address. | |
eee2fa6a KCP |
150 | */ |
151 | if (ipv6_addr_any(&rs->rs_bound_addr)) { | |
1e2b44e7 KCP |
152 | if (ipv6_addr_any(&rs->rs_conn_addr)) { |
153 | sin = (struct sockaddr_in *)uaddr; | |
154 | memset(sin, 0, sizeof(*sin)); | |
155 | sin->sin_family = AF_UNSPEC; | |
156 | return sizeof(*sin); | |
157 | } | |
158 | ||
e65d4d96 KCP |
159 | #if IS_ENABLED(CONFIG_IPV6) |
160 | if (!(ipv6_addr_type(&rs->rs_conn_addr) & | |
161 | IPV6_ADDR_MAPPED)) { | |
162 | sin6 = (struct sockaddr_in6 *)uaddr; | |
163 | memset(sin6, 0, sizeof(*sin6)); | |
164 | sin6->sin6_family = AF_INET6; | |
165 | return sizeof(*sin6); | |
1e2b44e7 | 166 | } |
e65d4d96 | 167 | #endif |
1e2b44e7 | 168 | |
e65d4d96 KCP |
169 | sin = (struct sockaddr_in *)uaddr; |
170 | memset(sin, 0, sizeof(*sin)); | |
171 | sin->sin_family = AF_INET; | |
172 | return sizeof(*sin); | |
eee2fa6a KCP |
173 | } |
174 | if (ipv6_addr_v4mapped(&rs->rs_bound_addr)) { | |
175 | sin = (struct sockaddr_in *)uaddr; | |
176 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
177 | sin->sin_family = AF_INET; | |
178 | sin->sin_port = rs->rs_bound_port; | |
179 | sin->sin_addr.s_addr = rs->rs_bound_addr_v4; | |
180 | uaddr_len = sizeof(*sin); | |
181 | } else { | |
182 | sin6 = (struct sockaddr_in6 *)uaddr; | |
183 | sin6->sin6_family = AF_INET6; | |
184 | sin6->sin6_port = rs->rs_bound_port; | |
185 | sin6->sin6_addr = rs->rs_bound_addr; | |
186 | sin6->sin6_flowinfo = 0; | |
187 | sin6->sin6_scope_id = rs->rs_bound_scope_id; | |
188 | uaddr_len = sizeof(*sin6); | |
189 | } | |
639b321b AG |
190 | } |
191 | ||
eee2fa6a | 192 | return uaddr_len; |
639b321b AG |
193 | } |
194 | ||
195 | /* | |
196 | * RDS' poll is without a doubt the least intuitive part of the interface, | |
a9a08845 | 197 | * as EPOLLIN and EPOLLOUT do not behave entirely as you would expect from |
639b321b AG |
198 | * a network protocol. |
199 | * | |
a9a08845 | 200 | * EPOLLIN is asserted if |
639b321b AG |
201 | * - there is data on the receive queue. |
202 | * - to signal that a previously congested destination may have become | |
203 | * uncongested | |
204 | * - A notification has been queued to the socket (this can be a congestion | |
401910db | 205 | * update, or a RDMA completion, or a MSG_ZEROCOPY completion). |
639b321b | 206 | * |
a9a08845 | 207 | * EPOLLOUT is asserted if there is room on the send queue. This does not mean |
639b321b AG |
208 | * however, that the next sendmsg() call will succeed. If the application tries |
209 | * to send to a congested destination, the system call may still fail (and | |
210 | * return ENOBUFS). | |
211 | */ | |
ade994f4 | 212 | static __poll_t rds_poll(struct file *file, struct socket *sock, |
639b321b AG |
213 | poll_table *wait) |
214 | { | |
215 | struct sock *sk = sock->sk; | |
216 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
ade994f4 | 217 | __poll_t mask = 0; |
639b321b AG |
218 | unsigned long flags; |
219 | ||
aa395145 | 220 | poll_wait(file, sk_sleep(sk), wait); |
639b321b | 221 | |
b98ba52f AG |
222 | if (rs->rs_seen_congestion) |
223 | poll_wait(file, &rds_poll_waitq, wait); | |
639b321b AG |
224 | |
225 | read_lock_irqsave(&rs->rs_recv_lock, flags); | |
226 | if (!rs->rs_cong_monitor) { | |
a9a08845 | 227 | /* When a congestion map was updated, we signal EPOLLIN for |
639b321b AG |
228 | * "historical" reasons. Applications can also poll for |
229 | * WRBAND instead. */ | |
230 | if (rds_cong_updated_since(&rs->rs_cong_track)) | |
a9a08845 | 231 | mask |= (EPOLLIN | EPOLLRDNORM | EPOLLWRBAND); |
639b321b AG |
232 | } else { |
233 | spin_lock(&rs->rs_lock); | |
234 | if (rs->rs_cong_notify) | |
a9a08845 | 235 | mask |= (EPOLLIN | EPOLLRDNORM); |
639b321b AG |
236 | spin_unlock(&rs->rs_lock); |
237 | } | |
f64f9e71 | 238 | if (!list_empty(&rs->rs_recv_queue) || |
401910db | 239 | !list_empty(&rs->rs_notify_queue) || |
9426bbc6 | 240 | !list_empty(&rs->rs_zcookie_queue.zcookie_head)) |
a9a08845 | 241 | mask |= (EPOLLIN | EPOLLRDNORM); |
639b321b | 242 | if (rs->rs_snd_bytes < rds_sk_sndbuf(rs)) |
a9a08845 | 243 | mask |= (EPOLLOUT | EPOLLWRNORM); |
01883eda SV |
244 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) |
245 | mask |= POLLERR; | |
639b321b AG |
246 | read_unlock_irqrestore(&rs->rs_recv_lock, flags); |
247 | ||
b98ba52f AG |
248 | /* clear state any time we wake a seen-congested socket */ |
249 | if (mask) | |
250 | rs->rs_seen_congestion = 0; | |
251 | ||
639b321b AG |
252 | return mask; |
253 | } | |
254 | ||
255 | static int rds_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
256 | { | |
257 | return -ENOIOCTLCMD; | |
258 | } | |
259 | ||
260 | static int rds_cancel_sent_to(struct rds_sock *rs, char __user *optval, | |
261 | int len) | |
262 | { | |
eee2fa6a | 263 | struct sockaddr_in6 sin6; |
639b321b AG |
264 | struct sockaddr_in sin; |
265 | int ret = 0; | |
266 | ||
267 | /* racing with another thread binding seems ok here */ | |
eee2fa6a | 268 | if (ipv6_addr_any(&rs->rs_bound_addr)) { |
639b321b AG |
269 | ret = -ENOTCONN; /* XXX not a great errno */ |
270 | goto out; | |
271 | } | |
272 | ||
273 | if (len < sizeof(struct sockaddr_in)) { | |
274 | ret = -EINVAL; | |
275 | goto out; | |
eee2fa6a KCP |
276 | } else if (len < sizeof(struct sockaddr_in6)) { |
277 | /* Assume IPv4 */ | |
278 | if (copy_from_user(&sin, optval, sizeof(struct sockaddr_in))) { | |
279 | ret = -EFAULT; | |
280 | goto out; | |
281 | } | |
282 | ipv6_addr_set_v4mapped(sin.sin_addr.s_addr, &sin6.sin6_addr); | |
283 | sin6.sin6_port = sin.sin_port; | |
284 | } else { | |
285 | if (copy_from_user(&sin6, optval, | |
286 | sizeof(struct sockaddr_in6))) { | |
287 | ret = -EFAULT; | |
288 | goto out; | |
289 | } | |
639b321b AG |
290 | } |
291 | ||
eee2fa6a | 292 | rds_send_drop_to(rs, &sin6); |
639b321b AG |
293 | out: |
294 | return ret; | |
295 | } | |
296 | ||
297 | static int rds_set_bool_option(unsigned char *optvar, char __user *optval, | |
298 | int optlen) | |
299 | { | |
300 | int value; | |
301 | ||
302 | if (optlen < sizeof(int)) | |
303 | return -EINVAL; | |
304 | if (get_user(value, (int __user *) optval)) | |
305 | return -EFAULT; | |
306 | *optvar = !!value; | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static int rds_cong_monitor(struct rds_sock *rs, char __user *optval, | |
311 | int optlen) | |
312 | { | |
313 | int ret; | |
314 | ||
315 | ret = rds_set_bool_option(&rs->rs_cong_monitor, optval, optlen); | |
316 | if (ret == 0) { | |
317 | if (rs->rs_cong_monitor) { | |
318 | rds_cong_add_socket(rs); | |
319 | } else { | |
320 | rds_cong_remove_socket(rs); | |
321 | rs->rs_cong_mask = 0; | |
322 | rs->rs_cong_notify = 0; | |
323 | } | |
324 | } | |
325 | return ret; | |
326 | } | |
327 | ||
d97dac54 SV |
328 | static int rds_set_transport(struct rds_sock *rs, char __user *optval, |
329 | int optlen) | |
330 | { | |
331 | int t_type; | |
332 | ||
333 | if (rs->rs_transport) | |
334 | return -EOPNOTSUPP; /* previously attached to transport */ | |
335 | ||
336 | if (optlen != sizeof(int)) | |
337 | return -EINVAL; | |
338 | ||
339 | if (copy_from_user(&t_type, (int __user *)optval, sizeof(t_type))) | |
340 | return -EFAULT; | |
341 | ||
342 | if (t_type < 0 || t_type >= RDS_TRANS_COUNT) | |
343 | return -EINVAL; | |
344 | ||
345 | rs->rs_transport = rds_trans_get(t_type); | |
346 | ||
347 | return rs->rs_transport ? 0 : -ENOPROTOOPT; | |
348 | } | |
349 | ||
5711f8b3 | 350 | static int rds_enable_recvtstamp(struct sock *sk, char __user *optval, |
351 | int optlen) | |
352 | { | |
353 | int val, valbool; | |
354 | ||
355 | if (optlen != sizeof(int)) | |
356 | return -EFAULT; | |
357 | ||
358 | if (get_user(val, (int __user *)optval)) | |
359 | return -EFAULT; | |
360 | ||
361 | valbool = val ? 1 : 0; | |
362 | ||
363 | if (valbool) | |
364 | sock_set_flag(sk, SOCK_RCVTSTAMP); | |
365 | else | |
366 | sock_reset_flag(sk, SOCK_RCVTSTAMP); | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
3289025a SS |
371 | static int rds_recv_track_latency(struct rds_sock *rs, char __user *optval, |
372 | int optlen) | |
373 | { | |
374 | struct rds_rx_trace_so trace; | |
375 | int i; | |
376 | ||
377 | if (optlen != sizeof(struct rds_rx_trace_so)) | |
378 | return -EFAULT; | |
379 | ||
380 | if (copy_from_user(&trace, optval, sizeof(trace))) | |
381 | return -EFAULT; | |
382 | ||
780e9829 | 383 | if (trace.rx_traces > RDS_MSG_RX_DGRAM_TRACE_MAX) |
384 | return -EFAULT; | |
385 | ||
3289025a SS |
386 | rs->rs_rx_traces = trace.rx_traces; |
387 | for (i = 0; i < rs->rs_rx_traces; i++) { | |
388 | if (trace.rx_trace_pos[i] > RDS_MSG_RX_DGRAM_TRACE_MAX) { | |
389 | rs->rs_rx_traces = 0; | |
390 | return -EFAULT; | |
391 | } | |
392 | rs->rs_rx_trace[i] = trace.rx_trace_pos[i]; | |
393 | } | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
639b321b | 398 | static int rds_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 399 | char __user *optval, unsigned int optlen) |
639b321b AG |
400 | { |
401 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
402 | int ret; | |
403 | ||
404 | if (level != SOL_RDS) { | |
405 | ret = -ENOPROTOOPT; | |
406 | goto out; | |
407 | } | |
408 | ||
409 | switch (optname) { | |
410 | case RDS_CANCEL_SENT_TO: | |
411 | ret = rds_cancel_sent_to(rs, optval, optlen); | |
412 | break; | |
413 | case RDS_GET_MR: | |
414 | ret = rds_get_mr(rs, optval, optlen); | |
415 | break; | |
244546f0 AG |
416 | case RDS_GET_MR_FOR_DEST: |
417 | ret = rds_get_mr_for_dest(rs, optval, optlen); | |
418 | break; | |
639b321b AG |
419 | case RDS_FREE_MR: |
420 | ret = rds_free_mr(rs, optval, optlen); | |
421 | break; | |
422 | case RDS_RECVERR: | |
423 | ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen); | |
424 | break; | |
425 | case RDS_CONG_MONITOR: | |
426 | ret = rds_cong_monitor(rs, optval, optlen); | |
427 | break; | |
d97dac54 SV |
428 | case SO_RDS_TRANSPORT: |
429 | lock_sock(sock->sk); | |
430 | ret = rds_set_transport(rs, optval, optlen); | |
431 | release_sock(sock->sk); | |
432 | break; | |
5711f8b3 | 433 | case SO_TIMESTAMP: |
434 | lock_sock(sock->sk); | |
435 | ret = rds_enable_recvtstamp(sock->sk, optval, optlen); | |
436 | release_sock(sock->sk); | |
437 | break; | |
3289025a SS |
438 | case SO_RDS_MSG_RXPATH_LATENCY: |
439 | ret = rds_recv_track_latency(rs, optval, optlen); | |
440 | break; | |
639b321b AG |
441 | default: |
442 | ret = -ENOPROTOOPT; | |
443 | } | |
444 | out: | |
445 | return ret; | |
446 | } | |
447 | ||
448 | static int rds_getsockopt(struct socket *sock, int level, int optname, | |
449 | char __user *optval, int __user *optlen) | |
450 | { | |
451 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
452 | int ret = -ENOPROTOOPT, len; | |
8ba38460 | 453 | int trans; |
639b321b AG |
454 | |
455 | if (level != SOL_RDS) | |
456 | goto out; | |
457 | ||
458 | if (get_user(len, optlen)) { | |
459 | ret = -EFAULT; | |
460 | goto out; | |
461 | } | |
462 | ||
463 | switch (optname) { | |
464 | case RDS_INFO_FIRST ... RDS_INFO_LAST: | |
465 | ret = rds_info_getsockopt(sock, optname, optval, | |
466 | optlen); | |
467 | break; | |
468 | ||
469 | case RDS_RECVERR: | |
470 | if (len < sizeof(int)) | |
471 | ret = -EINVAL; | |
472 | else | |
f64f9e71 JP |
473 | if (put_user(rs->rs_recverr, (int __user *) optval) || |
474 | put_user(sizeof(int), optlen)) | |
639b321b AG |
475 | ret = -EFAULT; |
476 | else | |
477 | ret = 0; | |
478 | break; | |
8ba38460 SV |
479 | case SO_RDS_TRANSPORT: |
480 | if (len < sizeof(int)) { | |
481 | ret = -EINVAL; | |
482 | break; | |
483 | } | |
484 | trans = (rs->rs_transport ? rs->rs_transport->t_type : | |
485 | RDS_TRANS_NONE); /* unbound */ | |
486 | if (put_user(trans, (int __user *)optval) || | |
487 | put_user(sizeof(int), optlen)) | |
488 | ret = -EFAULT; | |
489 | else | |
490 | ret = 0; | |
491 | break; | |
639b321b AG |
492 | default: |
493 | break; | |
494 | } | |
495 | ||
496 | out: | |
497 | return ret; | |
498 | ||
499 | } | |
500 | ||
501 | static int rds_connect(struct socket *sock, struct sockaddr *uaddr, | |
502 | int addr_len, int flags) | |
503 | { | |
504 | struct sock *sk = sock->sk; | |
eee2fa6a | 505 | struct sockaddr_in *sin; |
639b321b AG |
506 | struct rds_sock *rs = rds_sk_to_rs(sk); |
507 | int ret = 0; | |
508 | ||
509 | lock_sock(sk); | |
510 | ||
1e2b44e7 KCP |
511 | switch (uaddr->sa_family) { |
512 | case AF_INET: | |
eee2fa6a | 513 | sin = (struct sockaddr_in *)uaddr; |
1e2b44e7 KCP |
514 | if (addr_len < sizeof(struct sockaddr_in)) { |
515 | ret = -EINVAL; | |
eee2fa6a KCP |
516 | break; |
517 | } | |
518 | if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) { | |
519 | ret = -EDESTADDRREQ; | |
520 | break; | |
521 | } | |
522 | if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || | |
523 | sin->sin_addr.s_addr == htonl(INADDR_BROADCAST)) { | |
524 | ret = -EINVAL; | |
525 | break; | |
526 | } | |
527 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &rs->rs_conn_addr); | |
528 | rs->rs_conn_port = sin->sin_port; | |
529 | break; | |
639b321b | 530 | |
e65d4d96 KCP |
531 | #if IS_ENABLED(CONFIG_IPV6) |
532 | case AF_INET6: { | |
533 | struct sockaddr_in6 *sin6; | |
534 | int addr_type; | |
535 | ||
1e2b44e7 KCP |
536 | sin6 = (struct sockaddr_in6 *)uaddr; |
537 | if (addr_len < sizeof(struct sockaddr_in6)) { | |
538 | ret = -EINVAL; | |
539 | break; | |
540 | } | |
541 | addr_type = ipv6_addr_type(&sin6->sin6_addr); | |
542 | if (!(addr_type & IPV6_ADDR_UNICAST)) { | |
543 | __be32 addr4; | |
544 | ||
545 | if (!(addr_type & IPV6_ADDR_MAPPED)) { | |
546 | ret = -EPROTOTYPE; | |
547 | break; | |
548 | } | |
549 | ||
550 | /* It is a mapped address. Need to do some sanity | |
551 | * checks. | |
552 | */ | |
553 | addr4 = sin6->sin6_addr.s6_addr32[3]; | |
554 | if (addr4 == htonl(INADDR_ANY) || | |
555 | addr4 == htonl(INADDR_BROADCAST) || | |
556 | IN_MULTICAST(ntohl(addr4))) { | |
557 | ret = -EPROTOTYPE; | |
558 | break; | |
559 | } | |
560 | } | |
561 | ||
562 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
563 | /* If socket is arleady bound to a link local address, | |
564 | * the peer address must be on the same link. | |
565 | */ | |
566 | if (sin6->sin6_scope_id == 0 || | |
567 | (!ipv6_addr_any(&rs->rs_bound_addr) && | |
568 | rs->rs_bound_scope_id && | |
569 | sin6->sin6_scope_id != rs->rs_bound_scope_id)) { | |
570 | ret = -EINVAL; | |
571 | break; | |
572 | } | |
573 | /* Remember the connected address scope ID. It will | |
574 | * be checked against the binding local address when | |
575 | * the socket is bound. | |
576 | */ | |
577 | rs->rs_bound_scope_id = sin6->sin6_scope_id; | |
578 | } | |
579 | rs->rs_conn_addr = sin6->sin6_addr; | |
580 | rs->rs_conn_port = sin6->sin6_port; | |
eee2fa6a | 581 | break; |
e65d4d96 KCP |
582 | } |
583 | #endif | |
639b321b | 584 | |
eee2fa6a | 585 | default: |
1e2b44e7 | 586 | ret = -EAFNOSUPPORT; |
eee2fa6a | 587 | break; |
639b321b AG |
588 | } |
589 | ||
639b321b AG |
590 | release_sock(sk); |
591 | return ret; | |
592 | } | |
593 | ||
594 | static struct proto rds_proto = { | |
595 | .name = "RDS", | |
596 | .owner = THIS_MODULE, | |
597 | .obj_size = sizeof(struct rds_sock), | |
598 | }; | |
599 | ||
5708e868 | 600 | static const struct proto_ops rds_proto_ops = { |
639b321b AG |
601 | .family = AF_RDS, |
602 | .owner = THIS_MODULE, | |
603 | .release = rds_release, | |
604 | .bind = rds_bind, | |
605 | .connect = rds_connect, | |
606 | .socketpair = sock_no_socketpair, | |
607 | .accept = sock_no_accept, | |
608 | .getname = rds_getname, | |
609 | .poll = rds_poll, | |
610 | .ioctl = rds_ioctl, | |
611 | .listen = sock_no_listen, | |
612 | .shutdown = sock_no_shutdown, | |
613 | .setsockopt = rds_setsockopt, | |
614 | .getsockopt = rds_getsockopt, | |
615 | .sendmsg = rds_sendmsg, | |
616 | .recvmsg = rds_recvmsg, | |
617 | .mmap = sock_no_mmap, | |
618 | .sendpage = sock_no_sendpage, | |
619 | }; | |
620 | ||
0df5f9a6 | 621 | static void rds_sock_destruct(struct sock *sk) |
622 | { | |
623 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
624 | ||
625 | WARN_ON((&rs->rs_item != rs->rs_item.next || | |
626 | &rs->rs_item != rs->rs_item.prev)); | |
627 | } | |
628 | ||
639b321b AG |
629 | static int __rds_create(struct socket *sock, struct sock *sk, int protocol) |
630 | { | |
639b321b AG |
631 | struct rds_sock *rs; |
632 | ||
633 | sock_init_data(sock, sk); | |
634 | sock->ops = &rds_proto_ops; | |
635 | sk->sk_protocol = protocol; | |
0df5f9a6 | 636 | sk->sk_destruct = rds_sock_destruct; |
639b321b AG |
637 | |
638 | rs = rds_sk_to_rs(sk); | |
639 | spin_lock_init(&rs->rs_lock); | |
640 | rwlock_init(&rs->rs_recv_lock); | |
641 | INIT_LIST_HEAD(&rs->rs_send_queue); | |
642 | INIT_LIST_HEAD(&rs->rs_recv_queue); | |
643 | INIT_LIST_HEAD(&rs->rs_notify_queue); | |
644 | INIT_LIST_HEAD(&rs->rs_cong_list); | |
9426bbc6 | 645 | rds_message_zcopy_queue_init(&rs->rs_zcookie_queue); |
639b321b AG |
646 | spin_lock_init(&rs->rs_rdma_lock); |
647 | rs->rs_rdma_keys = RB_ROOT; | |
3289025a | 648 | rs->rs_rx_traces = 0; |
639b321b | 649 | |
efc3dbc3 | 650 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
651 | list_add_tail(&rs->rs_item, &rds_sock_list); |
652 | rds_sock_count++; | |
efc3dbc3 | 653 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
654 | |
655 | return 0; | |
656 | } | |
657 | ||
3f378b68 EP |
658 | static int rds_create(struct net *net, struct socket *sock, int protocol, |
659 | int kern) | |
639b321b AG |
660 | { |
661 | struct sock *sk; | |
662 | ||
663 | if (sock->type != SOCK_SEQPACKET || protocol) | |
664 | return -ESOCKTNOSUPPORT; | |
665 | ||
11aa9c28 | 666 | sk = sk_alloc(net, AF_RDS, GFP_ATOMIC, &rds_proto, kern); |
639b321b AG |
667 | if (!sk) |
668 | return -ENOMEM; | |
669 | ||
670 | return __rds_create(sock, sk, protocol); | |
671 | } | |
672 | ||
673 | void rds_sock_addref(struct rds_sock *rs) | |
674 | { | |
675 | sock_hold(rds_rs_to_sk(rs)); | |
676 | } | |
677 | ||
678 | void rds_sock_put(struct rds_sock *rs) | |
679 | { | |
680 | sock_put(rds_rs_to_sk(rs)); | |
681 | } | |
682 | ||
ec1b4cf7 | 683 | static const struct net_proto_family rds_family_ops = { |
639b321b AG |
684 | .family = AF_RDS, |
685 | .create = rds_create, | |
686 | .owner = THIS_MODULE, | |
687 | }; | |
688 | ||
689 | static void rds_sock_inc_info(struct socket *sock, unsigned int len, | |
690 | struct rds_info_iterator *iter, | |
691 | struct rds_info_lengths *lens) | |
692 | { | |
693 | struct rds_sock *rs; | |
639b321b | 694 | struct rds_incoming *inc; |
639b321b AG |
695 | unsigned int total = 0; |
696 | ||
697 | len /= sizeof(struct rds_info_message); | |
698 | ||
efc3dbc3 | 699 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
700 | |
701 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
639b321b AG |
702 | read_lock(&rs->rs_recv_lock); |
703 | ||
704 | /* XXX too lazy to maintain counts.. */ | |
705 | list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { | |
706 | total++; | |
707 | if (total <= len) | |
eee2fa6a KCP |
708 | rds_inc_info_copy(inc, iter, |
709 | inc->i_saddr.s6_addr32[3], | |
710 | rs->rs_bound_addr_v4, | |
711 | 1); | |
639b321b AG |
712 | } |
713 | ||
714 | read_unlock(&rs->rs_recv_lock); | |
715 | } | |
716 | ||
efc3dbc3 | 717 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
718 | |
719 | lens->nr = total; | |
720 | lens->each = sizeof(struct rds_info_message); | |
721 | } | |
722 | ||
723 | static void rds_sock_info(struct socket *sock, unsigned int len, | |
724 | struct rds_info_iterator *iter, | |
725 | struct rds_info_lengths *lens) | |
726 | { | |
727 | struct rds_info_socket sinfo; | |
728 | struct rds_sock *rs; | |
639b321b AG |
729 | |
730 | len /= sizeof(struct rds_info_socket); | |
731 | ||
efc3dbc3 | 732 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
733 | |
734 | if (len < rds_sock_count) | |
735 | goto out; | |
736 | ||
737 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
738 | sinfo.sndbuf = rds_sk_sndbuf(rs); | |
739 | sinfo.rcvbuf = rds_sk_rcvbuf(rs); | |
eee2fa6a KCP |
740 | sinfo.bound_addr = rs->rs_bound_addr_v4; |
741 | sinfo.connected_addr = rs->rs_conn_addr_v4; | |
639b321b AG |
742 | sinfo.bound_port = rs->rs_bound_port; |
743 | sinfo.connected_port = rs->rs_conn_port; | |
744 | sinfo.inum = sock_i_ino(rds_rs_to_sk(rs)); | |
745 | ||
746 | rds_info_copy(iter, &sinfo, sizeof(sinfo)); | |
747 | } | |
748 | ||
749 | out: | |
750 | lens->nr = rds_sock_count; | |
751 | lens->each = sizeof(struct rds_info_socket); | |
752 | ||
efc3dbc3 | 753 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
754 | } |
755 | ||
ef87b7ea | 756 | static void rds_exit(void) |
639b321b | 757 | { |
639b321b AG |
758 | sock_unregister(rds_family_ops.family); |
759 | proto_unregister(&rds_proto); | |
760 | rds_conn_exit(); | |
761 | rds_cong_exit(); | |
762 | rds_sysctl_exit(); | |
763 | rds_threads_exit(); | |
764 | rds_stats_exit(); | |
765 | rds_page_exit(); | |
7b565434 | 766 | rds_bind_lock_destroy(); |
639b321b AG |
767 | rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info); |
768 | rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
769 | } | |
770 | module_exit(rds_exit); | |
771 | ||
905dd418 SV |
772 | u32 rds_gen_num; |
773 | ||
ef87b7ea | 774 | static int rds_init(void) |
639b321b AG |
775 | { |
776 | int ret; | |
777 | ||
905dd418 SV |
778 | net_get_random_once(&rds_gen_num, sizeof(rds_gen_num)); |
779 | ||
7b565434 | 780 | ret = rds_bind_lock_init(); |
781 | if (ret) | |
782 | goto out; | |
9b9acde7 | 783 | |
639b321b AG |
784 | ret = rds_conn_init(); |
785 | if (ret) | |
7b565434 | 786 | goto out_bind; |
787 | ||
639b321b AG |
788 | ret = rds_threads_init(); |
789 | if (ret) | |
790 | goto out_conn; | |
791 | ret = rds_sysctl_init(); | |
792 | if (ret) | |
793 | goto out_threads; | |
794 | ret = rds_stats_init(); | |
795 | if (ret) | |
796 | goto out_sysctl; | |
797 | ret = proto_register(&rds_proto, 1); | |
798 | if (ret) | |
799 | goto out_stats; | |
800 | ret = sock_register(&rds_family_ops); | |
801 | if (ret) | |
802 | goto out_proto; | |
803 | ||
804 | rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info); | |
805 | rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
806 | ||
639b321b AG |
807 | goto out; |
808 | ||
639b321b AG |
809 | out_proto: |
810 | proto_unregister(&rds_proto); | |
811 | out_stats: | |
812 | rds_stats_exit(); | |
813 | out_sysctl: | |
814 | rds_sysctl_exit(); | |
815 | out_threads: | |
816 | rds_threads_exit(); | |
817 | out_conn: | |
818 | rds_conn_exit(); | |
819 | rds_cong_exit(); | |
820 | rds_page_exit(); | |
7b565434 | 821 | out_bind: |
822 | rds_bind_lock_destroy(); | |
639b321b AG |
823 | out: |
824 | return ret; | |
825 | } | |
826 | module_init(rds_init); | |
827 | ||
828 | #define DRV_VERSION "4.0" | |
829 | #define DRV_RELDATE "Feb 12, 2009" | |
830 | ||
831 | MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>"); | |
832 | MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets" | |
833 | " v" DRV_VERSION " (" DRV_RELDATE ")"); | |
834 | MODULE_VERSION(DRV_VERSION); | |
835 | MODULE_LICENSE("Dual BSD/GPL"); | |
836 | MODULE_ALIAS_NETPROTO(PF_RDS); |