Commit | Line | Data |
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639b321b | 1 | /* |
a46b5b6c | 2 | * Copyright (c) 2006, 2019 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 | { | |
3eb45036 | 257 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); |
56dc8bce | 258 | rds_tos_t utos, tos = 0; |
3eb45036 SS |
259 | |
260 | switch (cmd) { | |
261 | case SIOCRDSSETTOS: | |
56dc8bce | 262 | if (get_user(utos, (rds_tos_t __user *)arg)) |
3eb45036 SS |
263 | return -EFAULT; |
264 | ||
265 | if (rs->rs_transport && | |
56dc8bce SS |
266 | rs->rs_transport->get_tos_map) |
267 | tos = rs->rs_transport->get_tos_map(utos); | |
268 | else | |
269 | return -ENOIOCTLCMD; | |
3eb45036 SS |
270 | |
271 | spin_lock_bh(&rds_sock_lock); | |
272 | if (rs->rs_tos || rs->rs_conn) { | |
273 | spin_unlock_bh(&rds_sock_lock); | |
274 | return -EINVAL; | |
275 | } | |
276 | rs->rs_tos = tos; | |
277 | spin_unlock_bh(&rds_sock_lock); | |
278 | break; | |
279 | case SIOCRDSGETTOS: | |
280 | spin_lock_bh(&rds_sock_lock); | |
281 | tos = rs->rs_tos; | |
282 | spin_unlock_bh(&rds_sock_lock); | |
283 | if (put_user(tos, (rds_tos_t __user *)arg)) | |
284 | return -EFAULT; | |
285 | break; | |
286 | default: | |
287 | return -ENOIOCTLCMD; | |
288 | } | |
289 | ||
290 | return 0; | |
639b321b AG |
291 | } |
292 | ||
293 | static int rds_cancel_sent_to(struct rds_sock *rs, char __user *optval, | |
294 | int len) | |
295 | { | |
eee2fa6a | 296 | struct sockaddr_in6 sin6; |
639b321b AG |
297 | struct sockaddr_in sin; |
298 | int ret = 0; | |
299 | ||
300 | /* racing with another thread binding seems ok here */ | |
eee2fa6a | 301 | if (ipv6_addr_any(&rs->rs_bound_addr)) { |
639b321b AG |
302 | ret = -ENOTCONN; /* XXX not a great errno */ |
303 | goto out; | |
304 | } | |
305 | ||
306 | if (len < sizeof(struct sockaddr_in)) { | |
307 | ret = -EINVAL; | |
308 | goto out; | |
eee2fa6a KCP |
309 | } else if (len < sizeof(struct sockaddr_in6)) { |
310 | /* Assume IPv4 */ | |
311 | if (copy_from_user(&sin, optval, sizeof(struct sockaddr_in))) { | |
312 | ret = -EFAULT; | |
313 | goto out; | |
314 | } | |
315 | ipv6_addr_set_v4mapped(sin.sin_addr.s_addr, &sin6.sin6_addr); | |
316 | sin6.sin6_port = sin.sin_port; | |
317 | } else { | |
318 | if (copy_from_user(&sin6, optval, | |
319 | sizeof(struct sockaddr_in6))) { | |
320 | ret = -EFAULT; | |
321 | goto out; | |
322 | } | |
639b321b AG |
323 | } |
324 | ||
eee2fa6a | 325 | rds_send_drop_to(rs, &sin6); |
639b321b AG |
326 | out: |
327 | return ret; | |
328 | } | |
329 | ||
330 | static int rds_set_bool_option(unsigned char *optvar, char __user *optval, | |
331 | int optlen) | |
332 | { | |
333 | int value; | |
334 | ||
335 | if (optlen < sizeof(int)) | |
336 | return -EINVAL; | |
337 | if (get_user(value, (int __user *) optval)) | |
338 | return -EFAULT; | |
339 | *optvar = !!value; | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static int rds_cong_monitor(struct rds_sock *rs, char __user *optval, | |
344 | int optlen) | |
345 | { | |
346 | int ret; | |
347 | ||
348 | ret = rds_set_bool_option(&rs->rs_cong_monitor, optval, optlen); | |
349 | if (ret == 0) { | |
350 | if (rs->rs_cong_monitor) { | |
351 | rds_cong_add_socket(rs); | |
352 | } else { | |
353 | rds_cong_remove_socket(rs); | |
354 | rs->rs_cong_mask = 0; | |
355 | rs->rs_cong_notify = 0; | |
356 | } | |
357 | } | |
358 | return ret; | |
359 | } | |
360 | ||
d97dac54 SV |
361 | static int rds_set_transport(struct rds_sock *rs, char __user *optval, |
362 | int optlen) | |
363 | { | |
364 | int t_type; | |
365 | ||
366 | if (rs->rs_transport) | |
367 | return -EOPNOTSUPP; /* previously attached to transport */ | |
368 | ||
369 | if (optlen != sizeof(int)) | |
370 | return -EINVAL; | |
371 | ||
372 | if (copy_from_user(&t_type, (int __user *)optval, sizeof(t_type))) | |
373 | return -EFAULT; | |
374 | ||
375 | if (t_type < 0 || t_type >= RDS_TRANS_COUNT) | |
376 | return -EINVAL; | |
377 | ||
378 | rs->rs_transport = rds_trans_get(t_type); | |
379 | ||
380 | return rs->rs_transport ? 0 : -ENOPROTOOPT; | |
381 | } | |
382 | ||
5711f8b3 | 383 | static int rds_enable_recvtstamp(struct sock *sk, char __user *optval, |
887feae3 | 384 | int optlen, int optname) |
5711f8b3 | 385 | { |
386 | int val, valbool; | |
387 | ||
388 | if (optlen != sizeof(int)) | |
389 | return -EFAULT; | |
390 | ||
391 | if (get_user(val, (int __user *)optval)) | |
392 | return -EFAULT; | |
393 | ||
394 | valbool = val ? 1 : 0; | |
395 | ||
887feae3 DD |
396 | if (optname == SO_TIMESTAMP_NEW) |
397 | sock_set_flag(sk, SOCK_TSTAMP_NEW); | |
398 | ||
5711f8b3 | 399 | if (valbool) |
400 | sock_set_flag(sk, SOCK_RCVTSTAMP); | |
401 | else | |
402 | sock_reset_flag(sk, SOCK_RCVTSTAMP); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
3289025a SS |
407 | static int rds_recv_track_latency(struct rds_sock *rs, char __user *optval, |
408 | int optlen) | |
409 | { | |
410 | struct rds_rx_trace_so trace; | |
411 | int i; | |
412 | ||
413 | if (optlen != sizeof(struct rds_rx_trace_so)) | |
414 | return -EFAULT; | |
415 | ||
416 | if (copy_from_user(&trace, optval, sizeof(trace))) | |
417 | return -EFAULT; | |
418 | ||
780e9829 | 419 | if (trace.rx_traces > RDS_MSG_RX_DGRAM_TRACE_MAX) |
420 | return -EFAULT; | |
421 | ||
3289025a SS |
422 | rs->rs_rx_traces = trace.rx_traces; |
423 | for (i = 0; i < rs->rs_rx_traces; i++) { | |
424 | if (trace.rx_trace_pos[i] > RDS_MSG_RX_DGRAM_TRACE_MAX) { | |
425 | rs->rs_rx_traces = 0; | |
426 | return -EFAULT; | |
427 | } | |
428 | rs->rs_rx_trace[i] = trace.rx_trace_pos[i]; | |
429 | } | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
639b321b | 434 | static int rds_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 435 | char __user *optval, unsigned int optlen) |
639b321b AG |
436 | { |
437 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
438 | int ret; | |
439 | ||
440 | if (level != SOL_RDS) { | |
441 | ret = -ENOPROTOOPT; | |
442 | goto out; | |
443 | } | |
444 | ||
445 | switch (optname) { | |
446 | case RDS_CANCEL_SENT_TO: | |
447 | ret = rds_cancel_sent_to(rs, optval, optlen); | |
448 | break; | |
449 | case RDS_GET_MR: | |
450 | ret = rds_get_mr(rs, optval, optlen); | |
451 | break; | |
244546f0 AG |
452 | case RDS_GET_MR_FOR_DEST: |
453 | ret = rds_get_mr_for_dest(rs, optval, optlen); | |
454 | break; | |
639b321b AG |
455 | case RDS_FREE_MR: |
456 | ret = rds_free_mr(rs, optval, optlen); | |
457 | break; | |
458 | case RDS_RECVERR: | |
459 | ret = rds_set_bool_option(&rs->rs_recverr, optval, optlen); | |
460 | break; | |
461 | case RDS_CONG_MONITOR: | |
462 | ret = rds_cong_monitor(rs, optval, optlen); | |
463 | break; | |
d97dac54 SV |
464 | case SO_RDS_TRANSPORT: |
465 | lock_sock(sock->sk); | |
466 | ret = rds_set_transport(rs, optval, optlen); | |
467 | release_sock(sock->sk); | |
468 | break; | |
7f1bc6e9 | 469 | case SO_TIMESTAMP_OLD: |
887feae3 | 470 | case SO_TIMESTAMP_NEW: |
5711f8b3 | 471 | lock_sock(sock->sk); |
887feae3 | 472 | ret = rds_enable_recvtstamp(sock->sk, optval, optlen, optname); |
5711f8b3 | 473 | release_sock(sock->sk); |
474 | break; | |
3289025a SS |
475 | case SO_RDS_MSG_RXPATH_LATENCY: |
476 | ret = rds_recv_track_latency(rs, optval, optlen); | |
477 | break; | |
639b321b AG |
478 | default: |
479 | ret = -ENOPROTOOPT; | |
480 | } | |
481 | out: | |
482 | return ret; | |
483 | } | |
484 | ||
485 | static int rds_getsockopt(struct socket *sock, int level, int optname, | |
486 | char __user *optval, int __user *optlen) | |
487 | { | |
488 | struct rds_sock *rs = rds_sk_to_rs(sock->sk); | |
489 | int ret = -ENOPROTOOPT, len; | |
8ba38460 | 490 | int trans; |
639b321b AG |
491 | |
492 | if (level != SOL_RDS) | |
493 | goto out; | |
494 | ||
495 | if (get_user(len, optlen)) { | |
496 | ret = -EFAULT; | |
497 | goto out; | |
498 | } | |
499 | ||
500 | switch (optname) { | |
501 | case RDS_INFO_FIRST ... RDS_INFO_LAST: | |
502 | ret = rds_info_getsockopt(sock, optname, optval, | |
503 | optlen); | |
504 | break; | |
505 | ||
506 | case RDS_RECVERR: | |
507 | if (len < sizeof(int)) | |
508 | ret = -EINVAL; | |
509 | else | |
f64f9e71 JP |
510 | if (put_user(rs->rs_recverr, (int __user *) optval) || |
511 | put_user(sizeof(int), optlen)) | |
639b321b AG |
512 | ret = -EFAULT; |
513 | else | |
514 | ret = 0; | |
515 | break; | |
8ba38460 SV |
516 | case SO_RDS_TRANSPORT: |
517 | if (len < sizeof(int)) { | |
518 | ret = -EINVAL; | |
519 | break; | |
520 | } | |
521 | trans = (rs->rs_transport ? rs->rs_transport->t_type : | |
522 | RDS_TRANS_NONE); /* unbound */ | |
523 | if (put_user(trans, (int __user *)optval) || | |
524 | put_user(sizeof(int), optlen)) | |
525 | ret = -EFAULT; | |
526 | else | |
527 | ret = 0; | |
528 | break; | |
639b321b AG |
529 | default: |
530 | break; | |
531 | } | |
532 | ||
533 | out: | |
534 | return ret; | |
535 | ||
536 | } | |
537 | ||
538 | static int rds_connect(struct socket *sock, struct sockaddr *uaddr, | |
539 | int addr_len, int flags) | |
540 | { | |
541 | struct sock *sk = sock->sk; | |
eee2fa6a | 542 | struct sockaddr_in *sin; |
639b321b AG |
543 | struct rds_sock *rs = rds_sk_to_rs(sk); |
544 | int ret = 0; | |
545 | ||
dd3ac9a6 TH |
546 | if (addr_len < offsetofend(struct sockaddr, sa_family)) |
547 | return -EINVAL; | |
548 | ||
639b321b AG |
549 | lock_sock(sk); |
550 | ||
1e2b44e7 KCP |
551 | switch (uaddr->sa_family) { |
552 | case AF_INET: | |
eee2fa6a | 553 | sin = (struct sockaddr_in *)uaddr; |
1e2b44e7 KCP |
554 | if (addr_len < sizeof(struct sockaddr_in)) { |
555 | ret = -EINVAL; | |
eee2fa6a KCP |
556 | break; |
557 | } | |
558 | if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) { | |
559 | ret = -EDESTADDRREQ; | |
560 | break; | |
561 | } | |
842841ec | 562 | if (ipv4_is_multicast(sin->sin_addr.s_addr) || |
eee2fa6a KCP |
563 | sin->sin_addr.s_addr == htonl(INADDR_BROADCAST)) { |
564 | ret = -EINVAL; | |
565 | break; | |
566 | } | |
567 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &rs->rs_conn_addr); | |
568 | rs->rs_conn_port = sin->sin_port; | |
569 | break; | |
639b321b | 570 | |
e65d4d96 KCP |
571 | #if IS_ENABLED(CONFIG_IPV6) |
572 | case AF_INET6: { | |
573 | struct sockaddr_in6 *sin6; | |
574 | int addr_type; | |
575 | ||
1e2b44e7 KCP |
576 | sin6 = (struct sockaddr_in6 *)uaddr; |
577 | if (addr_len < sizeof(struct sockaddr_in6)) { | |
578 | ret = -EINVAL; | |
579 | break; | |
580 | } | |
581 | addr_type = ipv6_addr_type(&sin6->sin6_addr); | |
582 | if (!(addr_type & IPV6_ADDR_UNICAST)) { | |
583 | __be32 addr4; | |
584 | ||
585 | if (!(addr_type & IPV6_ADDR_MAPPED)) { | |
586 | ret = -EPROTOTYPE; | |
587 | break; | |
588 | } | |
589 | ||
590 | /* It is a mapped address. Need to do some sanity | |
591 | * checks. | |
592 | */ | |
593 | addr4 = sin6->sin6_addr.s6_addr32[3]; | |
594 | if (addr4 == htonl(INADDR_ANY) || | |
595 | addr4 == htonl(INADDR_BROADCAST) || | |
842841ec | 596 | ipv4_is_multicast(addr4)) { |
1e2b44e7 KCP |
597 | ret = -EPROTOTYPE; |
598 | break; | |
599 | } | |
600 | } | |
601 | ||
602 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
603 | /* If socket is arleady bound to a link local address, | |
604 | * the peer address must be on the same link. | |
605 | */ | |
606 | if (sin6->sin6_scope_id == 0 || | |
607 | (!ipv6_addr_any(&rs->rs_bound_addr) && | |
608 | rs->rs_bound_scope_id && | |
609 | sin6->sin6_scope_id != rs->rs_bound_scope_id)) { | |
610 | ret = -EINVAL; | |
611 | break; | |
612 | } | |
613 | /* Remember the connected address scope ID. It will | |
614 | * be checked against the binding local address when | |
615 | * the socket is bound. | |
616 | */ | |
617 | rs->rs_bound_scope_id = sin6->sin6_scope_id; | |
618 | } | |
619 | rs->rs_conn_addr = sin6->sin6_addr; | |
620 | rs->rs_conn_port = sin6->sin6_port; | |
eee2fa6a | 621 | break; |
e65d4d96 KCP |
622 | } |
623 | #endif | |
639b321b | 624 | |
eee2fa6a | 625 | default: |
1e2b44e7 | 626 | ret = -EAFNOSUPPORT; |
eee2fa6a | 627 | break; |
639b321b AG |
628 | } |
629 | ||
639b321b AG |
630 | release_sock(sk); |
631 | return ret; | |
632 | } | |
633 | ||
634 | static struct proto rds_proto = { | |
635 | .name = "RDS", | |
636 | .owner = THIS_MODULE, | |
637 | .obj_size = sizeof(struct rds_sock), | |
638 | }; | |
639 | ||
5708e868 | 640 | static const struct proto_ops rds_proto_ops = { |
639b321b AG |
641 | .family = AF_RDS, |
642 | .owner = THIS_MODULE, | |
643 | .release = rds_release, | |
644 | .bind = rds_bind, | |
645 | .connect = rds_connect, | |
646 | .socketpair = sock_no_socketpair, | |
647 | .accept = sock_no_accept, | |
648 | .getname = rds_getname, | |
649 | .poll = rds_poll, | |
650 | .ioctl = rds_ioctl, | |
651 | .listen = sock_no_listen, | |
652 | .shutdown = sock_no_shutdown, | |
653 | .setsockopt = rds_setsockopt, | |
654 | .getsockopt = rds_getsockopt, | |
655 | .sendmsg = rds_sendmsg, | |
656 | .recvmsg = rds_recvmsg, | |
657 | .mmap = sock_no_mmap, | |
658 | .sendpage = sock_no_sendpage, | |
659 | }; | |
660 | ||
0df5f9a6 | 661 | static void rds_sock_destruct(struct sock *sk) |
662 | { | |
663 | struct rds_sock *rs = rds_sk_to_rs(sk); | |
664 | ||
665 | WARN_ON((&rs->rs_item != rs->rs_item.next || | |
666 | &rs->rs_item != rs->rs_item.prev)); | |
667 | } | |
668 | ||
639b321b AG |
669 | static int __rds_create(struct socket *sock, struct sock *sk, int protocol) |
670 | { | |
639b321b AG |
671 | struct rds_sock *rs; |
672 | ||
673 | sock_init_data(sock, sk); | |
674 | sock->ops = &rds_proto_ops; | |
675 | sk->sk_protocol = protocol; | |
0df5f9a6 | 676 | sk->sk_destruct = rds_sock_destruct; |
639b321b AG |
677 | |
678 | rs = rds_sk_to_rs(sk); | |
679 | spin_lock_init(&rs->rs_lock); | |
680 | rwlock_init(&rs->rs_recv_lock); | |
681 | INIT_LIST_HEAD(&rs->rs_send_queue); | |
682 | INIT_LIST_HEAD(&rs->rs_recv_queue); | |
683 | INIT_LIST_HEAD(&rs->rs_notify_queue); | |
684 | INIT_LIST_HEAD(&rs->rs_cong_list); | |
9426bbc6 | 685 | rds_message_zcopy_queue_init(&rs->rs_zcookie_queue); |
639b321b AG |
686 | spin_lock_init(&rs->rs_rdma_lock); |
687 | rs->rs_rdma_keys = RB_ROOT; | |
3289025a | 688 | rs->rs_rx_traces = 0; |
3eb45036 SS |
689 | rs->rs_tos = 0; |
690 | rs->rs_conn = NULL; | |
639b321b | 691 | |
efc3dbc3 | 692 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
693 | list_add_tail(&rs->rs_item, &rds_sock_list); |
694 | rds_sock_count++; | |
efc3dbc3 | 695 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
696 | |
697 | return 0; | |
698 | } | |
699 | ||
3f378b68 EP |
700 | static int rds_create(struct net *net, struct socket *sock, int protocol, |
701 | int kern) | |
639b321b AG |
702 | { |
703 | struct sock *sk; | |
704 | ||
705 | if (sock->type != SOCK_SEQPACKET || protocol) | |
706 | return -ESOCKTNOSUPPORT; | |
707 | ||
356feaad | 708 | sk = sk_alloc(net, AF_RDS, GFP_KERNEL, &rds_proto, kern); |
639b321b AG |
709 | if (!sk) |
710 | return -ENOMEM; | |
711 | ||
712 | return __rds_create(sock, sk, protocol); | |
713 | } | |
714 | ||
715 | void rds_sock_addref(struct rds_sock *rs) | |
716 | { | |
717 | sock_hold(rds_rs_to_sk(rs)); | |
718 | } | |
719 | ||
720 | void rds_sock_put(struct rds_sock *rs) | |
721 | { | |
722 | sock_put(rds_rs_to_sk(rs)); | |
723 | } | |
724 | ||
ec1b4cf7 | 725 | static const struct net_proto_family rds_family_ops = { |
639b321b AG |
726 | .family = AF_RDS, |
727 | .create = rds_create, | |
728 | .owner = THIS_MODULE, | |
729 | }; | |
730 | ||
731 | static void rds_sock_inc_info(struct socket *sock, unsigned int len, | |
732 | struct rds_info_iterator *iter, | |
733 | struct rds_info_lengths *lens) | |
734 | { | |
735 | struct rds_sock *rs; | |
639b321b | 736 | struct rds_incoming *inc; |
639b321b AG |
737 | unsigned int total = 0; |
738 | ||
739 | len /= sizeof(struct rds_info_message); | |
740 | ||
efc3dbc3 | 741 | spin_lock_bh(&rds_sock_lock); |
639b321b AG |
742 | |
743 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
a46b5b6c KCP |
744 | /* This option only supports IPv4 sockets. */ |
745 | if (!ipv6_addr_v4mapped(&rs->rs_bound_addr)) | |
746 | continue; | |
747 | ||
639b321b AG |
748 | read_lock(&rs->rs_recv_lock); |
749 | ||
750 | /* XXX too lazy to maintain counts.. */ | |
751 | list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { | |
752 | total++; | |
753 | if (total <= len) | |
eee2fa6a KCP |
754 | rds_inc_info_copy(inc, iter, |
755 | inc->i_saddr.s6_addr32[3], | |
756 | rs->rs_bound_addr_v4, | |
757 | 1); | |
639b321b AG |
758 | } |
759 | ||
760 | read_unlock(&rs->rs_recv_lock); | |
761 | } | |
762 | ||
efc3dbc3 | 763 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
764 | |
765 | lens->nr = total; | |
766 | lens->each = sizeof(struct rds_info_message); | |
767 | } | |
768 | ||
a46b5b6c KCP |
769 | #if IS_ENABLED(CONFIG_IPV6) |
770 | static void rds6_sock_inc_info(struct socket *sock, unsigned int len, | |
771 | struct rds_info_iterator *iter, | |
772 | struct rds_info_lengths *lens) | |
773 | { | |
774 | struct rds_incoming *inc; | |
775 | unsigned int total = 0; | |
776 | struct rds_sock *rs; | |
777 | ||
778 | len /= sizeof(struct rds6_info_message); | |
779 | ||
780 | spin_lock_bh(&rds_sock_lock); | |
781 | ||
782 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
783 | read_lock(&rs->rs_recv_lock); | |
784 | ||
785 | list_for_each_entry(inc, &rs->rs_recv_queue, i_item) { | |
786 | total++; | |
787 | if (total <= len) | |
788 | rds6_inc_info_copy(inc, iter, &inc->i_saddr, | |
789 | &rs->rs_bound_addr, 1); | |
790 | } | |
791 | ||
792 | read_unlock(&rs->rs_recv_lock); | |
793 | } | |
794 | ||
795 | spin_unlock_bh(&rds_sock_lock); | |
796 | ||
797 | lens->nr = total; | |
798 | lens->each = sizeof(struct rds6_info_message); | |
799 | } | |
800 | #endif | |
801 | ||
639b321b AG |
802 | static void rds_sock_info(struct socket *sock, unsigned int len, |
803 | struct rds_info_iterator *iter, | |
804 | struct rds_info_lengths *lens) | |
805 | { | |
806 | struct rds_info_socket sinfo; | |
a46b5b6c | 807 | unsigned int cnt = 0; |
639b321b | 808 | struct rds_sock *rs; |
639b321b AG |
809 | |
810 | len /= sizeof(struct rds_info_socket); | |
811 | ||
efc3dbc3 | 812 | spin_lock_bh(&rds_sock_lock); |
639b321b | 813 | |
a46b5b6c KCP |
814 | if (len < rds_sock_count) { |
815 | cnt = rds_sock_count; | |
639b321b | 816 | goto out; |
a46b5b6c | 817 | } |
639b321b AG |
818 | |
819 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
a46b5b6c KCP |
820 | /* This option only supports IPv4 sockets. */ |
821 | if (!ipv6_addr_v4mapped(&rs->rs_bound_addr)) | |
822 | continue; | |
639b321b AG |
823 | sinfo.sndbuf = rds_sk_sndbuf(rs); |
824 | sinfo.rcvbuf = rds_sk_rcvbuf(rs); | |
eee2fa6a KCP |
825 | sinfo.bound_addr = rs->rs_bound_addr_v4; |
826 | sinfo.connected_addr = rs->rs_conn_addr_v4; | |
639b321b AG |
827 | sinfo.bound_port = rs->rs_bound_port; |
828 | sinfo.connected_port = rs->rs_conn_port; | |
829 | sinfo.inum = sock_i_ino(rds_rs_to_sk(rs)); | |
830 | ||
831 | rds_info_copy(iter, &sinfo, sizeof(sinfo)); | |
a46b5b6c | 832 | cnt++; |
639b321b AG |
833 | } |
834 | ||
835 | out: | |
a46b5b6c | 836 | lens->nr = cnt; |
639b321b AG |
837 | lens->each = sizeof(struct rds_info_socket); |
838 | ||
efc3dbc3 | 839 | spin_unlock_bh(&rds_sock_lock); |
639b321b AG |
840 | } |
841 | ||
a46b5b6c KCP |
842 | #if IS_ENABLED(CONFIG_IPV6) |
843 | static void rds6_sock_info(struct socket *sock, unsigned int len, | |
844 | struct rds_info_iterator *iter, | |
845 | struct rds_info_lengths *lens) | |
846 | { | |
847 | struct rds6_info_socket sinfo6; | |
848 | struct rds_sock *rs; | |
849 | ||
850 | len /= sizeof(struct rds6_info_socket); | |
851 | ||
852 | spin_lock_bh(&rds_sock_lock); | |
853 | ||
854 | if (len < rds_sock_count) | |
855 | goto out; | |
856 | ||
857 | list_for_each_entry(rs, &rds_sock_list, rs_item) { | |
858 | sinfo6.sndbuf = rds_sk_sndbuf(rs); | |
859 | sinfo6.rcvbuf = rds_sk_rcvbuf(rs); | |
860 | sinfo6.bound_addr = rs->rs_bound_addr; | |
861 | sinfo6.connected_addr = rs->rs_conn_addr; | |
862 | sinfo6.bound_port = rs->rs_bound_port; | |
863 | sinfo6.connected_port = rs->rs_conn_port; | |
864 | sinfo6.inum = sock_i_ino(rds_rs_to_sk(rs)); | |
865 | ||
866 | rds_info_copy(iter, &sinfo6, sizeof(sinfo6)); | |
867 | } | |
868 | ||
869 | out: | |
870 | lens->nr = rds_sock_count; | |
871 | lens->each = sizeof(struct rds6_info_socket); | |
872 | ||
873 | spin_unlock_bh(&rds_sock_lock); | |
874 | } | |
875 | #endif | |
876 | ||
ef87b7ea | 877 | static void rds_exit(void) |
639b321b | 878 | { |
639b321b AG |
879 | sock_unregister(rds_family_ops.family); |
880 | proto_unregister(&rds_proto); | |
881 | rds_conn_exit(); | |
882 | rds_cong_exit(); | |
883 | rds_sysctl_exit(); | |
884 | rds_threads_exit(); | |
885 | rds_stats_exit(); | |
886 | rds_page_exit(); | |
7b565434 | 887 | rds_bind_lock_destroy(); |
639b321b AG |
888 | rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info); |
889 | rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
a46b5b6c KCP |
890 | #if IS_ENABLED(CONFIG_IPV6) |
891 | rds_info_deregister_func(RDS6_INFO_SOCKETS, rds6_sock_info); | |
892 | rds_info_deregister_func(RDS6_INFO_RECV_MESSAGES, rds6_sock_inc_info); | |
893 | #endif | |
639b321b AG |
894 | } |
895 | module_exit(rds_exit); | |
896 | ||
905dd418 SV |
897 | u32 rds_gen_num; |
898 | ||
ef87b7ea | 899 | static int rds_init(void) |
639b321b AG |
900 | { |
901 | int ret; | |
902 | ||
905dd418 SV |
903 | net_get_random_once(&rds_gen_num, sizeof(rds_gen_num)); |
904 | ||
7b565434 | 905 | ret = rds_bind_lock_init(); |
906 | if (ret) | |
907 | goto out; | |
9b9acde7 | 908 | |
639b321b AG |
909 | ret = rds_conn_init(); |
910 | if (ret) | |
7b565434 | 911 | goto out_bind; |
912 | ||
639b321b AG |
913 | ret = rds_threads_init(); |
914 | if (ret) | |
915 | goto out_conn; | |
916 | ret = rds_sysctl_init(); | |
917 | if (ret) | |
918 | goto out_threads; | |
919 | ret = rds_stats_init(); | |
920 | if (ret) | |
921 | goto out_sysctl; | |
922 | ret = proto_register(&rds_proto, 1); | |
923 | if (ret) | |
924 | goto out_stats; | |
925 | ret = sock_register(&rds_family_ops); | |
926 | if (ret) | |
927 | goto out_proto; | |
928 | ||
929 | rds_info_register_func(RDS_INFO_SOCKETS, rds_sock_info); | |
930 | rds_info_register_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info); | |
a46b5b6c KCP |
931 | #if IS_ENABLED(CONFIG_IPV6) |
932 | rds_info_register_func(RDS6_INFO_SOCKETS, rds6_sock_info); | |
933 | rds_info_register_func(RDS6_INFO_RECV_MESSAGES, rds6_sock_inc_info); | |
934 | #endif | |
639b321b | 935 | |
639b321b AG |
936 | goto out; |
937 | ||
639b321b AG |
938 | out_proto: |
939 | proto_unregister(&rds_proto); | |
940 | out_stats: | |
941 | rds_stats_exit(); | |
942 | out_sysctl: | |
943 | rds_sysctl_exit(); | |
944 | out_threads: | |
945 | rds_threads_exit(); | |
946 | out_conn: | |
947 | rds_conn_exit(); | |
948 | rds_cong_exit(); | |
949 | rds_page_exit(); | |
7b565434 | 950 | out_bind: |
951 | rds_bind_lock_destroy(); | |
639b321b AG |
952 | out: |
953 | return ret; | |
954 | } | |
955 | module_init(rds_init); | |
956 | ||
957 | #define DRV_VERSION "4.0" | |
958 | #define DRV_RELDATE "Feb 12, 2009" | |
959 | ||
960 | MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>"); | |
961 | MODULE_DESCRIPTION("RDS: Reliable Datagram Sockets" | |
962 | " v" DRV_VERSION " (" DRV_RELDATE ")"); | |
963 | MODULE_VERSION(DRV_VERSION); | |
964 | MODULE_LICENSE("Dual BSD/GPL"); | |
965 | MODULE_ALIAS_NETPROTO(PF_RDS); |