Commit | Line | Data |
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e51060f0 SH |
1 | /* |
2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. | |
3 | * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. | |
4 | * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. | |
5 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
6 | * | |
a9474917 SH |
7 | * This software is available to you under a choice of one of two |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
e51060f0 | 12 | * |
a9474917 SH |
13 | * Redistribution and use in source and binary forms, with or |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
e51060f0 | 16 | * |
a9474917 SH |
17 | * - Redistributions of source code must retain the above |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
e51060f0 | 20 | * |
a9474917 SH |
21 | * - Redistributions in binary form must reproduce the above |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
e51060f0 | 25 | * |
a9474917 SH |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
e51060f0 SH |
34 | */ |
35 | ||
36 | #include <linux/completion.h> | |
37 | #include <linux/in.h> | |
38 | #include <linux/in6.h> | |
39 | #include <linux/mutex.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/idr.h> | |
07ebafba | 42 | #include <linux/inetdevice.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
e51060f0 SH |
44 | |
45 | #include <net/tcp.h> | |
1f5175ad | 46 | #include <net/ipv6.h> |
e51060f0 SH |
47 | |
48 | #include <rdma/rdma_cm.h> | |
49 | #include <rdma/rdma_cm_ib.h> | |
50 | #include <rdma/ib_cache.h> | |
51 | #include <rdma/ib_cm.h> | |
52 | #include <rdma/ib_sa.h> | |
07ebafba | 53 | #include <rdma/iw_cm.h> |
e51060f0 SH |
54 | |
55 | MODULE_AUTHOR("Sean Hefty"); | |
56 | MODULE_DESCRIPTION("Generic RDMA CM Agent"); | |
57 | MODULE_LICENSE("Dual BSD/GPL"); | |
58 | ||
59 | #define CMA_CM_RESPONSE_TIMEOUT 20 | |
d5bb7599 | 60 | #define CMA_MAX_CM_RETRIES 15 |
dcb3f974 | 61 | #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) |
3c86aa70 | 62 | #define CMA_IBOE_PACKET_LIFETIME 18 |
e51060f0 SH |
63 | |
64 | static void cma_add_one(struct ib_device *device); | |
65 | static void cma_remove_one(struct ib_device *device); | |
66 | ||
67 | static struct ib_client cma_client = { | |
68 | .name = "cma", | |
69 | .add = cma_add_one, | |
70 | .remove = cma_remove_one | |
71 | }; | |
72 | ||
c1a0b23b | 73 | static struct ib_sa_client sa_client; |
7a118df3 | 74 | static struct rdma_addr_client addr_client; |
e51060f0 SH |
75 | static LIST_HEAD(dev_list); |
76 | static LIST_HEAD(listen_any_list); | |
77 | static DEFINE_MUTEX(lock); | |
78 | static struct workqueue_struct *cma_wq; | |
79 | static DEFINE_IDR(sdp_ps); | |
80 | static DEFINE_IDR(tcp_ps); | |
628e5f6d | 81 | static DEFINE_IDR(udp_ps); |
c8f6a362 | 82 | static DEFINE_IDR(ipoib_ps); |
e51060f0 SH |
83 | |
84 | struct cma_device { | |
85 | struct list_head list; | |
86 | struct ib_device *device; | |
e51060f0 SH |
87 | struct completion comp; |
88 | atomic_t refcount; | |
89 | struct list_head id_list; | |
90 | }; | |
91 | ||
92 | enum cma_state { | |
93 | CMA_IDLE, | |
94 | CMA_ADDR_QUERY, | |
95 | CMA_ADDR_RESOLVED, | |
96 | CMA_ROUTE_QUERY, | |
97 | CMA_ROUTE_RESOLVED, | |
98 | CMA_CONNECT, | |
99 | CMA_DISCONNECT, | |
100 | CMA_ADDR_BOUND, | |
101 | CMA_LISTEN, | |
102 | CMA_DEVICE_REMOVAL, | |
103 | CMA_DESTROYING | |
104 | }; | |
105 | ||
106 | struct rdma_bind_list { | |
107 | struct idr *ps; | |
108 | struct hlist_head owners; | |
109 | unsigned short port; | |
110 | }; | |
111 | ||
112 | /* | |
113 | * Device removal can occur at anytime, so we need extra handling to | |
114 | * serialize notifying the user of device removal with other callbacks. | |
115 | * We do this by disabling removal notification while a callback is in process, | |
116 | * and reporting it after the callback completes. | |
117 | */ | |
118 | struct rdma_id_private { | |
119 | struct rdma_cm_id id; | |
120 | ||
121 | struct rdma_bind_list *bind_list; | |
122 | struct hlist_node node; | |
d02d1f53 SH |
123 | struct list_head list; /* listen_any_list or cma_device.list */ |
124 | struct list_head listen_list; /* per device listens */ | |
e51060f0 | 125 | struct cma_device *cma_dev; |
c8f6a362 | 126 | struct list_head mc_list; |
e51060f0 | 127 | |
d02d1f53 | 128 | int internal_id; |
e51060f0 SH |
129 | enum cma_state state; |
130 | spinlock_t lock; | |
c5483388 SH |
131 | struct mutex qp_mutex; |
132 | ||
e51060f0 SH |
133 | struct completion comp; |
134 | atomic_t refcount; | |
de910bd9 | 135 | struct mutex handler_mutex; |
e51060f0 SH |
136 | |
137 | int backlog; | |
138 | int timeout_ms; | |
139 | struct ib_sa_query *query; | |
140 | int query_id; | |
141 | union { | |
142 | struct ib_cm_id *ib; | |
07ebafba | 143 | struct iw_cm_id *iw; |
e51060f0 SH |
144 | } cm_id; |
145 | ||
146 | u32 seq_num; | |
c8f6a362 | 147 | u32 qkey; |
e51060f0 | 148 | u32 qp_num; |
e51060f0 | 149 | u8 srq; |
a81c994d | 150 | u8 tos; |
e51060f0 SH |
151 | }; |
152 | ||
c8f6a362 SH |
153 | struct cma_multicast { |
154 | struct rdma_id_private *id_priv; | |
155 | union { | |
156 | struct ib_sa_multicast *ib; | |
157 | } multicast; | |
158 | struct list_head list; | |
159 | void *context; | |
3f446754 | 160 | struct sockaddr_storage addr; |
3c86aa70 | 161 | struct kref mcref; |
c8f6a362 SH |
162 | }; |
163 | ||
e51060f0 SH |
164 | struct cma_work { |
165 | struct work_struct work; | |
166 | struct rdma_id_private *id; | |
167 | enum cma_state old_state; | |
168 | enum cma_state new_state; | |
169 | struct rdma_cm_event event; | |
170 | }; | |
171 | ||
dd5bdff8 OG |
172 | struct cma_ndev_work { |
173 | struct work_struct work; | |
174 | struct rdma_id_private *id; | |
175 | struct rdma_cm_event event; | |
176 | }; | |
177 | ||
3c86aa70 EC |
178 | struct iboe_mcast_work { |
179 | struct work_struct work; | |
180 | struct rdma_id_private *id; | |
181 | struct cma_multicast *mc; | |
182 | }; | |
183 | ||
e51060f0 SH |
184 | union cma_ip_addr { |
185 | struct in6_addr ip6; | |
186 | struct { | |
1b90c137 AV |
187 | __be32 pad[3]; |
188 | __be32 addr; | |
e51060f0 SH |
189 | } ip4; |
190 | }; | |
191 | ||
192 | struct cma_hdr { | |
193 | u8 cma_version; | |
194 | u8 ip_version; /* IP version: 7:4 */ | |
1b90c137 | 195 | __be16 port; |
e51060f0 SH |
196 | union cma_ip_addr src_addr; |
197 | union cma_ip_addr dst_addr; | |
198 | }; | |
199 | ||
200 | struct sdp_hh { | |
201 | u8 bsdh[16]; | |
202 | u8 sdp_version; /* Major version: 7:4 */ | |
203 | u8 ip_version; /* IP version: 7:4 */ | |
204 | u8 sdp_specific1[10]; | |
1b90c137 AV |
205 | __be16 port; |
206 | __be16 sdp_specific2; | |
e51060f0 SH |
207 | union cma_ip_addr src_addr; |
208 | union cma_ip_addr dst_addr; | |
209 | }; | |
210 | ||
211 | struct sdp_hah { | |
212 | u8 bsdh[16]; | |
213 | u8 sdp_version; | |
214 | }; | |
215 | ||
216 | #define CMA_VERSION 0x00 | |
217 | #define SDP_MAJ_VERSION 0x2 | |
218 | ||
219 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
220 | { | |
221 | unsigned long flags; | |
222 | int ret; | |
223 | ||
224 | spin_lock_irqsave(&id_priv->lock, flags); | |
225 | ret = (id_priv->state == comp); | |
226 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
227 | return ret; | |
228 | } | |
229 | ||
230 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
231 | enum cma_state comp, enum cma_state exch) | |
232 | { | |
233 | unsigned long flags; | |
234 | int ret; | |
235 | ||
236 | spin_lock_irqsave(&id_priv->lock, flags); | |
237 | if ((ret = (id_priv->state == comp))) | |
238 | id_priv->state = exch; | |
239 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
240 | return ret; | |
241 | } | |
242 | ||
243 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
244 | enum cma_state exch) | |
245 | { | |
246 | unsigned long flags; | |
247 | enum cma_state old; | |
248 | ||
249 | spin_lock_irqsave(&id_priv->lock, flags); | |
250 | old = id_priv->state; | |
251 | id_priv->state = exch; | |
252 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
253 | return old; | |
254 | } | |
255 | ||
256 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
257 | { | |
258 | return hdr->ip_version >> 4; | |
259 | } | |
260 | ||
261 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
262 | { | |
263 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
264 | } | |
265 | ||
266 | static inline u8 sdp_get_majv(u8 sdp_version) | |
267 | { | |
268 | return sdp_version >> 4; | |
269 | } | |
270 | ||
271 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
272 | { | |
273 | return hh->ip_version >> 4; | |
274 | } | |
275 | ||
276 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
277 | { | |
278 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
279 | } | |
280 | ||
c8f6a362 SH |
281 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
282 | { | |
283 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); | |
284 | } | |
285 | ||
e51060f0 SH |
286 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
287 | struct cma_device *cma_dev) | |
288 | { | |
289 | atomic_inc(&cma_dev->refcount); | |
290 | id_priv->cma_dev = cma_dev; | |
291 | id_priv->id.device = cma_dev->device; | |
3c86aa70 EC |
292 | id_priv->id.route.addr.dev_addr.transport = |
293 | rdma_node_get_transport(cma_dev->device->node_type); | |
e51060f0 SH |
294 | list_add_tail(&id_priv->list, &cma_dev->id_list); |
295 | } | |
296 | ||
297 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
298 | { | |
299 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
300 | complete(&cma_dev->comp); | |
301 | } | |
302 | ||
3c86aa70 EC |
303 | static inline void release_mc(struct kref *kref) |
304 | { | |
305 | struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); | |
306 | ||
307 | kfree(mc->multicast.ib); | |
308 | kfree(mc); | |
309 | } | |
310 | ||
e51060f0 SH |
311 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) |
312 | { | |
313 | list_del(&id_priv->list); | |
314 | cma_deref_dev(id_priv->cma_dev); | |
315 | id_priv->cma_dev = NULL; | |
316 | } | |
317 | ||
d2ca39f2 | 318 | static int cma_set_qkey(struct rdma_id_private *id_priv) |
c8f6a362 SH |
319 | { |
320 | struct ib_sa_mcmember_rec rec; | |
321 | int ret = 0; | |
322 | ||
d2ca39f2 YE |
323 | if (id_priv->qkey) |
324 | return 0; | |
325 | ||
326 | switch (id_priv->id.ps) { | |
c8f6a362 | 327 | case RDMA_PS_UDP: |
d2ca39f2 | 328 | id_priv->qkey = RDMA_UDP_QKEY; |
c8f6a362 SH |
329 | break; |
330 | case RDMA_PS_IPOIB: | |
d2ca39f2 YE |
331 | ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); |
332 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, | |
333 | id_priv->id.port_num, &rec.mgid, | |
334 | &rec); | |
335 | if (!ret) | |
336 | id_priv->qkey = be32_to_cpu(rec.qkey); | |
c8f6a362 SH |
337 | break; |
338 | default: | |
339 | break; | |
340 | } | |
341 | return ret; | |
342 | } | |
343 | ||
3c86aa70 EC |
344 | static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) |
345 | { | |
346 | int i; | |
347 | int err; | |
348 | struct ib_port_attr props; | |
349 | union ib_gid tmp; | |
350 | ||
351 | err = ib_query_port(device, port_num, &props); | |
352 | if (err) | |
353 | return 1; | |
354 | ||
355 | for (i = 0; i < props.gid_tbl_len; ++i) { | |
356 | err = ib_query_gid(device, port_num, i, &tmp); | |
357 | if (err) | |
358 | return 1; | |
359 | if (!memcmp(&tmp, gid, sizeof tmp)) | |
360 | return 0; | |
361 | } | |
362 | ||
363 | return -EAGAIN; | |
364 | } | |
365 | ||
07ebafba | 366 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 367 | { |
c8f6a362 | 368 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
e51060f0 | 369 | struct cma_device *cma_dev; |
3c86aa70 | 370 | union ib_gid gid, iboe_gid; |
e51060f0 | 371 | int ret = -ENODEV; |
3c86aa70 EC |
372 | u8 port; |
373 | enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? | |
374 | IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; | |
e51060f0 | 375 | |
3c86aa70 EC |
376 | iboe_addr_get_sgid(dev_addr, &iboe_gid); |
377 | memcpy(&gid, dev_addr->src_dev_addr + | |
378 | rdma_addr_gid_offset(dev_addr), sizeof gid); | |
e51060f0 | 379 | list_for_each_entry(cma_dev, &dev_list, list) { |
3c86aa70 EC |
380 | for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { |
381 | if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { | |
382 | if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && | |
383 | rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) | |
384 | ret = find_gid_port(cma_dev->device, &iboe_gid, port); | |
385 | else | |
386 | ret = find_gid_port(cma_dev->device, &gid, port); | |
387 | ||
388 | if (!ret) { | |
389 | id_priv->id.port_num = port; | |
390 | goto out; | |
391 | } else if (ret == 1) | |
392 | break; | |
393 | } | |
e51060f0 SH |
394 | } |
395 | } | |
3c86aa70 EC |
396 | |
397 | out: | |
398 | if (!ret) | |
399 | cma_attach_to_dev(id_priv, cma_dev); | |
400 | ||
e51060f0 SH |
401 | return ret; |
402 | } | |
403 | ||
e51060f0 SH |
404 | static void cma_deref_id(struct rdma_id_private *id_priv) |
405 | { | |
406 | if (atomic_dec_and_test(&id_priv->refcount)) | |
407 | complete(&id_priv->comp); | |
408 | } | |
409 | ||
de910bd9 | 410 | static int cma_disable_callback(struct rdma_id_private *id_priv, |
8aa08602 SH |
411 | enum cma_state state) |
412 | { | |
de910bd9 OG |
413 | mutex_lock(&id_priv->handler_mutex); |
414 | if (id_priv->state != state) { | |
415 | mutex_unlock(&id_priv->handler_mutex); | |
416 | return -EINVAL; | |
417 | } | |
418 | return 0; | |
e51060f0 SH |
419 | } |
420 | ||
6c719f5c SH |
421 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
422 | { | |
423 | return (id_priv->id.device && id_priv->cm_id.ib); | |
424 | } | |
425 | ||
e51060f0 SH |
426 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
427 | void *context, enum rdma_port_space ps) | |
428 | { | |
429 | struct rdma_id_private *id_priv; | |
430 | ||
431 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
432 | if (!id_priv) | |
433 | return ERR_PTR(-ENOMEM); | |
434 | ||
435 | id_priv->state = CMA_IDLE; | |
436 | id_priv->id.context = context; | |
437 | id_priv->id.event_handler = event_handler; | |
438 | id_priv->id.ps = ps; | |
439 | spin_lock_init(&id_priv->lock); | |
c5483388 | 440 | mutex_init(&id_priv->qp_mutex); |
e51060f0 SH |
441 | init_completion(&id_priv->comp); |
442 | atomic_set(&id_priv->refcount, 1); | |
de910bd9 | 443 | mutex_init(&id_priv->handler_mutex); |
e51060f0 | 444 | INIT_LIST_HEAD(&id_priv->listen_list); |
c8f6a362 | 445 | INIT_LIST_HEAD(&id_priv->mc_list); |
e51060f0 SH |
446 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
447 | ||
448 | return &id_priv->id; | |
449 | } | |
450 | EXPORT_SYMBOL(rdma_create_id); | |
451 | ||
c8f6a362 | 452 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
e51060f0 SH |
453 | { |
454 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 455 | int qp_attr_mask, ret; |
e51060f0 | 456 | |
c8f6a362 SH |
457 | qp_attr.qp_state = IB_QPS_INIT; |
458 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); | |
e51060f0 SH |
459 | if (ret) |
460 | return ret; | |
461 | ||
c8f6a362 SH |
462 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
463 | if (ret) | |
464 | return ret; | |
465 | ||
466 | qp_attr.qp_state = IB_QPS_RTR; | |
467 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); | |
468 | if (ret) | |
469 | return ret; | |
470 | ||
471 | qp_attr.qp_state = IB_QPS_RTS; | |
472 | qp_attr.sq_psn = 0; | |
473 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
474 | ||
475 | return ret; | |
e51060f0 SH |
476 | } |
477 | ||
c8f6a362 | 478 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
07ebafba TT |
479 | { |
480 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 481 | int qp_attr_mask, ret; |
07ebafba TT |
482 | |
483 | qp_attr.qp_state = IB_QPS_INIT; | |
c8f6a362 SH |
484 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
485 | if (ret) | |
486 | return ret; | |
07ebafba | 487 | |
c8f6a362 | 488 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
07ebafba TT |
489 | } |
490 | ||
e51060f0 SH |
491 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
492 | struct ib_qp_init_attr *qp_init_attr) | |
493 | { | |
494 | struct rdma_id_private *id_priv; | |
495 | struct ib_qp *qp; | |
496 | int ret; | |
497 | ||
498 | id_priv = container_of(id, struct rdma_id_private, id); | |
499 | if (id->device != pd->device) | |
500 | return -EINVAL; | |
501 | ||
502 | qp = ib_create_qp(pd, qp_init_attr); | |
503 | if (IS_ERR(qp)) | |
504 | return PTR_ERR(qp); | |
505 | ||
c8f6a362 SH |
506 | if (cma_is_ud_ps(id_priv->id.ps)) |
507 | ret = cma_init_ud_qp(id_priv, qp); | |
508 | else | |
509 | ret = cma_init_conn_qp(id_priv, qp); | |
e51060f0 SH |
510 | if (ret) |
511 | goto err; | |
512 | ||
513 | id->qp = qp; | |
514 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
515 | id_priv->srq = (qp->srq != NULL); |
516 | return 0; | |
517 | err: | |
518 | ib_destroy_qp(qp); | |
519 | return ret; | |
520 | } | |
521 | EXPORT_SYMBOL(rdma_create_qp); | |
522 | ||
523 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
524 | { | |
c5483388 SH |
525 | struct rdma_id_private *id_priv; |
526 | ||
527 | id_priv = container_of(id, struct rdma_id_private, id); | |
528 | mutex_lock(&id_priv->qp_mutex); | |
529 | ib_destroy_qp(id_priv->id.qp); | |
530 | id_priv->id.qp = NULL; | |
531 | mutex_unlock(&id_priv->qp_mutex); | |
e51060f0 SH |
532 | } |
533 | EXPORT_SYMBOL(rdma_destroy_qp); | |
534 | ||
5851bb89 SH |
535 | static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, |
536 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
537 | { |
538 | struct ib_qp_attr qp_attr; | |
539 | int qp_attr_mask, ret; | |
540 | ||
c5483388 SH |
541 | mutex_lock(&id_priv->qp_mutex); |
542 | if (!id_priv->id.qp) { | |
543 | ret = 0; | |
544 | goto out; | |
545 | } | |
e51060f0 SH |
546 | |
547 | /* Need to update QP attributes from default values. */ | |
548 | qp_attr.qp_state = IB_QPS_INIT; | |
c5483388 | 549 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 550 | if (ret) |
c5483388 | 551 | goto out; |
e51060f0 | 552 | |
c5483388 | 553 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
e51060f0 | 554 | if (ret) |
c5483388 | 555 | goto out; |
e51060f0 SH |
556 | |
557 | qp_attr.qp_state = IB_QPS_RTR; | |
c5483388 | 558 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 559 | if (ret) |
c5483388 | 560 | goto out; |
e51060f0 | 561 | |
5851bb89 SH |
562 | if (conn_param) |
563 | qp_attr.max_dest_rd_atomic = conn_param->responder_resources; | |
c5483388 SH |
564 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
565 | out: | |
566 | mutex_unlock(&id_priv->qp_mutex); | |
567 | return ret; | |
e51060f0 SH |
568 | } |
569 | ||
5851bb89 SH |
570 | static int cma_modify_qp_rts(struct rdma_id_private *id_priv, |
571 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
572 | { |
573 | struct ib_qp_attr qp_attr; | |
574 | int qp_attr_mask, ret; | |
575 | ||
c5483388 SH |
576 | mutex_lock(&id_priv->qp_mutex); |
577 | if (!id_priv->id.qp) { | |
578 | ret = 0; | |
579 | goto out; | |
580 | } | |
e51060f0 SH |
581 | |
582 | qp_attr.qp_state = IB_QPS_RTS; | |
c5483388 | 583 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 584 | if (ret) |
c5483388 | 585 | goto out; |
e51060f0 | 586 | |
5851bb89 SH |
587 | if (conn_param) |
588 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
c5483388 SH |
589 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
590 | out: | |
591 | mutex_unlock(&id_priv->qp_mutex); | |
592 | return ret; | |
e51060f0 SH |
593 | } |
594 | ||
c5483388 | 595 | static int cma_modify_qp_err(struct rdma_id_private *id_priv) |
e51060f0 SH |
596 | { |
597 | struct ib_qp_attr qp_attr; | |
c5483388 | 598 | int ret; |
e51060f0 | 599 | |
c5483388 SH |
600 | mutex_lock(&id_priv->qp_mutex); |
601 | if (!id_priv->id.qp) { | |
602 | ret = 0; | |
603 | goto out; | |
604 | } | |
e51060f0 SH |
605 | |
606 | qp_attr.qp_state = IB_QPS_ERR; | |
c5483388 SH |
607 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); |
608 | out: | |
609 | mutex_unlock(&id_priv->qp_mutex); | |
610 | return ret; | |
e51060f0 SH |
611 | } |
612 | ||
c8f6a362 SH |
613 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
614 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) | |
615 | { | |
616 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
617 | int ret; | |
3c86aa70 EC |
618 | u16 pkey; |
619 | ||
620 | if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == | |
621 | IB_LINK_LAYER_INFINIBAND) | |
622 | pkey = ib_addr_get_pkey(dev_addr); | |
623 | else | |
624 | pkey = 0xffff; | |
c8f6a362 SH |
625 | |
626 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
3c86aa70 | 627 | pkey, &qp_attr->pkey_index); |
c8f6a362 SH |
628 | if (ret) |
629 | return ret; | |
630 | ||
631 | qp_attr->port_num = id_priv->id.port_num; | |
632 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
633 | ||
634 | if (cma_is_ud_ps(id_priv->id.ps)) { | |
d2ca39f2 YE |
635 | ret = cma_set_qkey(id_priv); |
636 | if (ret) | |
637 | return ret; | |
638 | ||
c8f6a362 SH |
639 | qp_attr->qkey = id_priv->qkey; |
640 | *qp_attr_mask |= IB_QP_QKEY; | |
641 | } else { | |
642 | qp_attr->qp_access_flags = 0; | |
643 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; | |
644 | } | |
645 | return 0; | |
646 | } | |
647 | ||
e51060f0 SH |
648 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
649 | int *qp_attr_mask) | |
650 | { | |
651 | struct rdma_id_private *id_priv; | |
c8f6a362 | 652 | int ret = 0; |
e51060f0 SH |
653 | |
654 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
655 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
656 | case RDMA_TRANSPORT_IB: | |
c8f6a362 SH |
657 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
658 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); | |
659 | else | |
660 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
661 | qp_attr_mask); | |
e51060f0 SH |
662 | if (qp_attr->qp_state == IB_QPS_RTR) |
663 | qp_attr->rq_psn = id_priv->seq_num; | |
664 | break; | |
07ebafba | 665 | case RDMA_TRANSPORT_IWARP: |
c8f6a362 | 666 | if (!id_priv->cm_id.iw) { |
8f076531 | 667 | qp_attr->qp_access_flags = 0; |
c8f6a362 SH |
668 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
669 | } else | |
670 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
671 | qp_attr_mask); | |
07ebafba | 672 | break; |
e51060f0 SH |
673 | default: |
674 | ret = -ENOSYS; | |
675 | break; | |
676 | } | |
677 | ||
678 | return ret; | |
679 | } | |
680 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
681 | ||
682 | static inline int cma_zero_addr(struct sockaddr *addr) | |
683 | { | |
684 | struct in6_addr *ip6; | |
685 | ||
686 | if (addr->sa_family == AF_INET) | |
6360a02a JP |
687 | return ipv4_is_zeronet( |
688 | ((struct sockaddr_in *)addr)->sin_addr.s_addr); | |
e51060f0 SH |
689 | else { |
690 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
691 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 692 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
693 | } |
694 | } | |
695 | ||
696 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
697 | { | |
1f5175ad AS |
698 | if (addr->sa_family == AF_INET) |
699 | return ipv4_is_loopback( | |
700 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
701 | else | |
702 | return ipv6_addr_loopback( | |
703 | &((struct sockaddr_in6 *) addr)->sin6_addr); | |
e51060f0 SH |
704 | } |
705 | ||
706 | static inline int cma_any_addr(struct sockaddr *addr) | |
707 | { | |
708 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
709 | } | |
710 | ||
628e5f6d SH |
711 | static inline __be16 cma_port(struct sockaddr *addr) |
712 | { | |
713 | if (addr->sa_family == AF_INET) | |
714 | return ((struct sockaddr_in *) addr)->sin_port; | |
715 | else | |
716 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
717 | } | |
718 | ||
e51060f0 SH |
719 | static inline int cma_any_port(struct sockaddr *addr) |
720 | { | |
628e5f6d | 721 | return !cma_port(addr); |
e51060f0 SH |
722 | } |
723 | ||
724 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
1b90c137 | 725 | u8 *ip_ver, __be16 *port, |
e51060f0 SH |
726 | union cma_ip_addr **src, union cma_ip_addr **dst) |
727 | { | |
728 | switch (ps) { | |
729 | case RDMA_PS_SDP: | |
730 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
731 | SDP_MAJ_VERSION) | |
732 | return -EINVAL; | |
733 | ||
734 | *ip_ver = sdp_get_ip_ver(hdr); | |
735 | *port = ((struct sdp_hh *) hdr)->port; | |
736 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
737 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
738 | break; | |
739 | default: | |
740 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
741 | return -EINVAL; | |
742 | ||
743 | *ip_ver = cma_get_ip_ver(hdr); | |
744 | *port = ((struct cma_hdr *) hdr)->port; | |
745 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
746 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
747 | break; | |
748 | } | |
749 | ||
750 | if (*ip_ver != 4 && *ip_ver != 6) | |
751 | return -EINVAL; | |
752 | return 0; | |
753 | } | |
754 | ||
755 | static void cma_save_net_info(struct rdma_addr *addr, | |
756 | struct rdma_addr *listen_addr, | |
1b90c137 | 757 | u8 ip_ver, __be16 port, |
e51060f0 SH |
758 | union cma_ip_addr *src, union cma_ip_addr *dst) |
759 | { | |
760 | struct sockaddr_in *listen4, *ip4; | |
761 | struct sockaddr_in6 *listen6, *ip6; | |
762 | ||
763 | switch (ip_ver) { | |
764 | case 4: | |
765 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
766 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
767 | ip4->sin_family = listen4->sin_family; | |
768 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
769 | ip4->sin_port = listen4->sin_port; | |
770 | ||
771 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
772 | ip4->sin_family = listen4->sin_family; | |
773 | ip4->sin_addr.s_addr = src->ip4.addr; | |
774 | ip4->sin_port = port; | |
775 | break; | |
776 | case 6: | |
777 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
778 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
779 | ip6->sin6_family = listen6->sin6_family; | |
780 | ip6->sin6_addr = dst->ip6; | |
781 | ip6->sin6_port = listen6->sin6_port; | |
782 | ||
783 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
784 | ip6->sin6_family = listen6->sin6_family; | |
785 | ip6->sin6_addr = src->ip6; | |
786 | ip6->sin6_port = port; | |
787 | break; | |
788 | default: | |
789 | break; | |
790 | } | |
791 | } | |
792 | ||
793 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
794 | { | |
795 | switch (ps) { | |
796 | case RDMA_PS_SDP: | |
797 | return 0; | |
798 | default: | |
799 | return sizeof(struct cma_hdr); | |
800 | } | |
801 | } | |
802 | ||
e51060f0 SH |
803 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
804 | { | |
3c86aa70 EC |
805 | switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { |
806 | case IB_LINK_LAYER_INFINIBAND: | |
e51060f0 SH |
807 | if (id_priv->query) |
808 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
809 | break; | |
810 | default: | |
811 | break; | |
812 | } | |
813 | } | |
814 | ||
e51060f0 SH |
815 | static void cma_cancel_listens(struct rdma_id_private *id_priv) |
816 | { | |
817 | struct rdma_id_private *dev_id_priv; | |
818 | ||
d02d1f53 SH |
819 | /* |
820 | * Remove from listen_any_list to prevent added devices from spawning | |
821 | * additional listen requests. | |
822 | */ | |
e51060f0 SH |
823 | mutex_lock(&lock); |
824 | list_del(&id_priv->list); | |
825 | ||
826 | while (!list_empty(&id_priv->listen_list)) { | |
827 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
828 | struct rdma_id_private, listen_list); | |
d02d1f53 SH |
829 | /* sync with device removal to avoid duplicate destruction */ |
830 | list_del_init(&dev_id_priv->list); | |
831 | list_del(&dev_id_priv->listen_list); | |
832 | mutex_unlock(&lock); | |
833 | ||
834 | rdma_destroy_id(&dev_id_priv->id); | |
835 | mutex_lock(&lock); | |
e51060f0 SH |
836 | } |
837 | mutex_unlock(&lock); | |
838 | } | |
839 | ||
840 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
841 | enum cma_state state) | |
842 | { | |
843 | switch (state) { | |
844 | case CMA_ADDR_QUERY: | |
845 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
846 | break; | |
847 | case CMA_ROUTE_QUERY: | |
848 | cma_cancel_route(id_priv); | |
849 | break; | |
850 | case CMA_LISTEN: | |
3f446754 RD |
851 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) |
852 | && !id_priv->cma_dev) | |
e51060f0 SH |
853 | cma_cancel_listens(id_priv); |
854 | break; | |
855 | default: | |
856 | break; | |
857 | } | |
858 | } | |
859 | ||
860 | static void cma_release_port(struct rdma_id_private *id_priv) | |
861 | { | |
862 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
863 | ||
864 | if (!bind_list) | |
865 | return; | |
866 | ||
867 | mutex_lock(&lock); | |
868 | hlist_del(&id_priv->node); | |
869 | if (hlist_empty(&bind_list->owners)) { | |
870 | idr_remove(bind_list->ps, bind_list->port); | |
871 | kfree(bind_list); | |
872 | } | |
873 | mutex_unlock(&lock); | |
874 | } | |
875 | ||
c8f6a362 SH |
876 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
877 | { | |
878 | struct cma_multicast *mc; | |
879 | ||
880 | while (!list_empty(&id_priv->mc_list)) { | |
881 | mc = container_of(id_priv->mc_list.next, | |
882 | struct cma_multicast, list); | |
883 | list_del(&mc->list); | |
3c86aa70 EC |
884 | switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { |
885 | case IB_LINK_LAYER_INFINIBAND: | |
886 | ib_sa_free_multicast(mc->multicast.ib); | |
887 | kfree(mc); | |
888 | break; | |
889 | case IB_LINK_LAYER_ETHERNET: | |
890 | kref_put(&mc->mcref, release_mc); | |
891 | break; | |
892 | default: | |
893 | break; | |
894 | } | |
c8f6a362 SH |
895 | } |
896 | } | |
897 | ||
e51060f0 SH |
898 | void rdma_destroy_id(struct rdma_cm_id *id) |
899 | { | |
900 | struct rdma_id_private *id_priv; | |
901 | enum cma_state state; | |
902 | ||
903 | id_priv = container_of(id, struct rdma_id_private, id); | |
904 | state = cma_exch(id_priv, CMA_DESTROYING); | |
905 | cma_cancel_operation(id_priv, state); | |
906 | ||
61a73c70 | 907 | mutex_lock(&lock); |
e51060f0 | 908 | if (id_priv->cma_dev) { |
61a73c70 | 909 | mutex_unlock(&lock); |
3c86aa70 | 910 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
07ebafba | 911 | case RDMA_TRANSPORT_IB: |
3cd96564 | 912 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
913 | ib_destroy_cm_id(id_priv->cm_id.ib); |
914 | break; | |
07ebafba TT |
915 | case RDMA_TRANSPORT_IWARP: |
916 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
917 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
918 | break; | |
e51060f0 SH |
919 | default: |
920 | break; | |
921 | } | |
c8f6a362 | 922 | cma_leave_mc_groups(id_priv); |
3cd96564 | 923 | mutex_lock(&lock); |
e51060f0 | 924 | cma_detach_from_dev(id_priv); |
e51060f0 | 925 | } |
61a73c70 | 926 | mutex_unlock(&lock); |
e51060f0 SH |
927 | |
928 | cma_release_port(id_priv); | |
929 | cma_deref_id(id_priv); | |
930 | wait_for_completion(&id_priv->comp); | |
931 | ||
d02d1f53 SH |
932 | if (id_priv->internal_id) |
933 | cma_deref_id(id_priv->id.context); | |
934 | ||
e51060f0 SH |
935 | kfree(id_priv->id.route.path_rec); |
936 | kfree(id_priv); | |
937 | } | |
938 | EXPORT_SYMBOL(rdma_destroy_id); | |
939 | ||
940 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
941 | { | |
942 | int ret; | |
943 | ||
5851bb89 | 944 | ret = cma_modify_qp_rtr(id_priv, NULL); |
e51060f0 SH |
945 | if (ret) |
946 | goto reject; | |
947 | ||
5851bb89 | 948 | ret = cma_modify_qp_rts(id_priv, NULL); |
e51060f0 SH |
949 | if (ret) |
950 | goto reject; | |
951 | ||
952 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
953 | if (ret) | |
954 | goto reject; | |
955 | ||
956 | return 0; | |
957 | reject: | |
c5483388 | 958 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
959 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
960 | NULL, 0, NULL, 0); | |
961 | return ret; | |
962 | } | |
963 | ||
964 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
965 | { | |
966 | if (id_priv->id.ps == RDMA_PS_SDP && | |
967 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
968 | SDP_MAJ_VERSION) | |
969 | return -EINVAL; | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
a1b1b61f SH |
974 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
975 | struct ib_cm_rep_event_param *rep_data, | |
976 | void *private_data) | |
977 | { | |
978 | event->param.conn.private_data = private_data; | |
979 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
980 | event->param.conn.responder_resources = rep_data->responder_resources; | |
981 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
982 | event->param.conn.flow_control = rep_data->flow_control; | |
983 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
984 | event->param.conn.srq = rep_data->srq; | |
985 | event->param.conn.qp_num = rep_data->remote_qpn; | |
986 | } | |
987 | ||
e51060f0 SH |
988 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
989 | { | |
990 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
991 | struct rdma_cm_event event; |
992 | int ret = 0; | |
e51060f0 | 993 | |
38ca83a5 AV |
994 | if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && |
995 | cma_disable_callback(id_priv, CMA_CONNECT)) || | |
996 | (ib_event->event == IB_CM_TIMEWAIT_EXIT && | |
997 | cma_disable_callback(id_priv, CMA_DISCONNECT))) | |
8aa08602 | 998 | return 0; |
e51060f0 | 999 | |
a1b1b61f | 1000 | memset(&event, 0, sizeof event); |
e51060f0 SH |
1001 | switch (ib_event->event) { |
1002 | case IB_CM_REQ_ERROR: | |
1003 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
1004 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
1005 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
1006 | break; |
1007 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
1008 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
1009 | if (event.status) | |
1010 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 1011 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
1012 | event.status = cma_rep_recv(id_priv); |
1013 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
1014 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 1015 | } else |
a1b1b61f SH |
1016 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
1017 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
1018 | ib_event->private_data); | |
e51060f0 SH |
1019 | break; |
1020 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
1021 | case IB_CM_USER_ESTABLISHED: |
1022 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
1023 | break; |
1024 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 1025 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
1026 | case IB_CM_DREQ_RECEIVED: |
1027 | case IB_CM_DREP_RECEIVED: | |
1028 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
1029 | goto out; | |
a1b1b61f | 1030 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
1031 | break; |
1032 | case IB_CM_TIMEWAIT_EXIT: | |
38ca83a5 AV |
1033 | event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; |
1034 | break; | |
e51060f0 SH |
1035 | case IB_CM_MRA_RECEIVED: |
1036 | /* ignore event */ | |
1037 | goto out; | |
1038 | case IB_CM_REJ_RECEIVED: | |
c5483388 | 1039 | cma_modify_qp_err(id_priv); |
a1b1b61f SH |
1040 | event.status = ib_event->param.rej_rcvd.reason; |
1041 | event.event = RDMA_CM_EVENT_REJECTED; | |
1042 | event.param.conn.private_data = ib_event->private_data; | |
1043 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
1044 | break; |
1045 | default: | |
468f2239 | 1046 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
e51060f0 SH |
1047 | ib_event->event); |
1048 | goto out; | |
1049 | } | |
1050 | ||
a1b1b61f | 1051 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
1052 | if (ret) { |
1053 | /* Destroy the CM ID by returning a non-zero value. */ | |
1054 | id_priv->cm_id.ib = NULL; | |
1055 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1056 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1057 | rdma_destroy_id(&id_priv->id); |
1058 | return ret; | |
1059 | } | |
1060 | out: | |
de910bd9 | 1061 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1062 | return ret; |
1063 | } | |
1064 | ||
628e5f6d SH |
1065 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
1066 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
1067 | { |
1068 | struct rdma_id_private *id_priv; | |
1069 | struct rdma_cm_id *id; | |
1070 | struct rdma_route *rt; | |
1071 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1072 | __be16 port; |
e51060f0 | 1073 | u8 ip_ver; |
64c5e613 | 1074 | int ret; |
e51060f0 | 1075 | |
3f168d2b KK |
1076 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
1077 | &ip_ver, &port, &src, &dst)) | |
1078 | goto err; | |
1079 | ||
e51060f0 SH |
1080 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
1081 | listen_id->ps); | |
1082 | if (IS_ERR(id)) | |
3f168d2b KK |
1083 | goto err; |
1084 | ||
1085 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1086 | ip_ver, port, src, dst); | |
e51060f0 SH |
1087 | |
1088 | rt = &id->route; | |
1089 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
1090 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
1091 | GFP_KERNEL); | |
e51060f0 | 1092 | if (!rt->path_rec) |
3f168d2b | 1093 | goto destroy_id; |
e51060f0 | 1094 | |
e51060f0 SH |
1095 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
1096 | if (rt->num_paths == 2) | |
1097 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
1098 | ||
6f8372b6 SH |
1099 | if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { |
1100 | rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; | |
1101 | rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
1102 | ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); | |
1103 | } else { | |
1104 | ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, | |
1105 | &rt->addr.dev_addr); | |
1106 | if (ret) | |
1107 | goto destroy_id; | |
1108 | } | |
1109 | rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
e51060f0 SH |
1110 | |
1111 | id_priv = container_of(id, struct rdma_id_private, id); | |
1112 | id_priv->state = CMA_CONNECT; | |
1113 | return id_priv; | |
3f168d2b KK |
1114 | |
1115 | destroy_id: | |
e51060f0 | 1116 | rdma_destroy_id(id); |
3f168d2b | 1117 | err: |
e51060f0 SH |
1118 | return NULL; |
1119 | } | |
1120 | ||
628e5f6d SH |
1121 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
1122 | struct ib_cm_event *ib_event) | |
1123 | { | |
1124 | struct rdma_id_private *id_priv; | |
1125 | struct rdma_cm_id *id; | |
1126 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1127 | __be16 port; |
628e5f6d SH |
1128 | u8 ip_ver; |
1129 | int ret; | |
1130 | ||
1131 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
1132 | listen_id->ps); | |
1133 | if (IS_ERR(id)) | |
1134 | return NULL; | |
1135 | ||
1136 | ||
1137 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
1138 | &ip_ver, &port, &src, &dst)) | |
1139 | goto err; | |
1140 | ||
1141 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1142 | ip_ver, port, src, dst); | |
1143 | ||
6f8372b6 SH |
1144 | if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { |
1145 | ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, | |
1146 | &id->route.addr.dev_addr); | |
1147 | if (ret) | |
1148 | goto err; | |
1149 | } | |
628e5f6d SH |
1150 | |
1151 | id_priv = container_of(id, struct rdma_id_private, id); | |
1152 | id_priv->state = CMA_CONNECT; | |
1153 | return id_priv; | |
1154 | err: | |
1155 | rdma_destroy_id(id); | |
1156 | return NULL; | |
1157 | } | |
1158 | ||
a1b1b61f SH |
1159 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
1160 | struct ib_cm_req_event_param *req_data, | |
1161 | void *private_data, int offset) | |
1162 | { | |
1163 | event->param.conn.private_data = private_data + offset; | |
1164 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
1165 | event->param.conn.responder_resources = req_data->responder_resources; | |
1166 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
1167 | event->param.conn.flow_control = req_data->flow_control; | |
1168 | event->param.conn.retry_count = req_data->retry_count; | |
1169 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
1170 | event->param.conn.srq = req_data->srq; | |
1171 | event->param.conn.qp_num = req_data->remote_qpn; | |
1172 | } | |
1173 | ||
e51060f0 SH |
1174 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1175 | { | |
1176 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 1177 | struct rdma_cm_event event; |
e51060f0 SH |
1178 | int offset, ret; |
1179 | ||
1180 | listen_id = cm_id->context; | |
de910bd9 | 1181 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1182 | return -ECONNABORTED; |
e51060f0 | 1183 | |
628e5f6d SH |
1184 | memset(&event, 0, sizeof event); |
1185 | offset = cma_user_data_offset(listen_id->id.ps); | |
1186 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
c8f6a362 | 1187 | if (cma_is_ud_ps(listen_id->id.ps)) { |
628e5f6d SH |
1188 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
1189 | event.param.ud.private_data = ib_event->private_data + offset; | |
1190 | event.param.ud.private_data_len = | |
1191 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
1192 | } else { | |
1193 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); | |
1194 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
1195 | ib_event->private_data, offset); | |
1196 | } | |
e51060f0 SH |
1197 | if (!conn_id) { |
1198 | ret = -ENOMEM; | |
1199 | goto out; | |
1200 | } | |
1201 | ||
de910bd9 | 1202 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
61a73c70 | 1203 | mutex_lock(&lock); |
07ebafba | 1204 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1205 | mutex_unlock(&lock); |
a1a733f6 KK |
1206 | if (ret) |
1207 | goto release_conn_id; | |
e51060f0 SH |
1208 | |
1209 | conn_id->cm_id.ib = cm_id; | |
1210 | cm_id->context = conn_id; | |
1211 | cm_id->cm_handler = cma_ib_handler; | |
1212 | ||
25ae21a1 SH |
1213 | /* |
1214 | * Protect against the user destroying conn_id from another thread | |
1215 | * until we're done accessing it. | |
1216 | */ | |
1217 | atomic_inc(&conn_id->refcount); | |
a1b1b61f | 1218 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
45d9478d | 1219 | if (!ret) { |
ead595ae SH |
1220 | /* |
1221 | * Acquire mutex to prevent user executing rdma_destroy_id() | |
1222 | * while we're accessing the cm_id. | |
1223 | */ | |
1224 | mutex_lock(&lock); | |
1225 | if (cma_comp(conn_id, CMA_CONNECT) && | |
1226 | !cma_is_ud_ps(conn_id->id.ps)) | |
1227 | ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); | |
1228 | mutex_unlock(&lock); | |
de910bd9 | 1229 | mutex_unlock(&conn_id->handler_mutex); |
25ae21a1 | 1230 | cma_deref_id(conn_id); |
a1a733f6 | 1231 | goto out; |
45d9478d | 1232 | } |
25ae21a1 | 1233 | cma_deref_id(conn_id); |
a1a733f6 KK |
1234 | |
1235 | /* Destroy the CM ID by returning a non-zero value. */ | |
1236 | conn_id->cm_id.ib = NULL; | |
1237 | ||
1238 | release_conn_id: | |
1239 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1240 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 KK |
1241 | rdma_destroy_id(&conn_id->id); |
1242 | ||
e51060f0 | 1243 | out: |
de910bd9 | 1244 | mutex_unlock(&listen_id->handler_mutex); |
e51060f0 SH |
1245 | return ret; |
1246 | } | |
1247 | ||
1248 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1249 | { | |
628e5f6d | 1250 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1251 | } |
1252 | ||
1253 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1254 | struct ib_cm_compare_data *compare) | |
1255 | { | |
1256 | struct cma_hdr *cma_data, *cma_mask; | |
1257 | struct sdp_hh *sdp_data, *sdp_mask; | |
1b90c137 | 1258 | __be32 ip4_addr; |
e51060f0 SH |
1259 | struct in6_addr ip6_addr; |
1260 | ||
1261 | memset(compare, 0, sizeof *compare); | |
1262 | cma_data = (void *) compare->data; | |
1263 | cma_mask = (void *) compare->mask; | |
1264 | sdp_data = (void *) compare->data; | |
1265 | sdp_mask = (void *) compare->mask; | |
1266 | ||
1267 | switch (addr->sa_family) { | |
1268 | case AF_INET: | |
1269 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1270 | if (ps == RDMA_PS_SDP) { | |
1271 | sdp_set_ip_ver(sdp_data, 4); | |
1272 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1273 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1274 | sdp_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1275 | } else { |
1276 | cma_set_ip_ver(cma_data, 4); | |
1277 | cma_set_ip_ver(cma_mask, 0xF); | |
1278 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1279 | cma_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1280 | } |
1281 | break; | |
1282 | case AF_INET6: | |
1283 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1284 | if (ps == RDMA_PS_SDP) { | |
1285 | sdp_set_ip_ver(sdp_data, 6); | |
1286 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1287 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1288 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1289 | sizeof sdp_mask->dst_addr.ip6); | |
1290 | } else { | |
1291 | cma_set_ip_ver(cma_data, 6); | |
1292 | cma_set_ip_ver(cma_mask, 0xF); | |
1293 | cma_data->dst_addr.ip6 = ip6_addr; | |
1294 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1295 | sizeof cma_mask->dst_addr.ip6); | |
1296 | } | |
1297 | break; | |
1298 | default: | |
1299 | break; | |
1300 | } | |
1301 | } | |
1302 | ||
07ebafba TT |
1303 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1304 | { | |
1305 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1306 | struct rdma_cm_event event; |
07ebafba TT |
1307 | struct sockaddr_in *sin; |
1308 | int ret = 0; | |
1309 | ||
de910bd9 | 1310 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
be65f086 | 1311 | return 0; |
07ebafba | 1312 | |
be65f086 | 1313 | memset(&event, 0, sizeof event); |
07ebafba TT |
1314 | switch (iw_event->event) { |
1315 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1316 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1317 | break; |
1318 | case IW_CM_EVENT_CONNECT_REPLY: | |
1319 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1320 | *sin = iw_event->local_addr; | |
1321 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1322 | *sin = iw_event->remote_addr; | |
881a045f SW |
1323 | switch (iw_event->status) { |
1324 | case 0: | |
a1b1b61f | 1325 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1326 | break; |
1327 | case -ECONNRESET: | |
1328 | case -ECONNREFUSED: | |
1329 | event.event = RDMA_CM_EVENT_REJECTED; | |
1330 | break; | |
1331 | case -ETIMEDOUT: | |
1332 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1333 | break; | |
1334 | default: | |
1335 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1336 | break; | |
1337 | } | |
07ebafba TT |
1338 | break; |
1339 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1340 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1341 | break; |
1342 | default: | |
1343 | BUG_ON(1); | |
1344 | } | |
1345 | ||
a1b1b61f SH |
1346 | event.status = iw_event->status; |
1347 | event.param.conn.private_data = iw_event->private_data; | |
1348 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1349 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1350 | if (ret) { |
1351 | /* Destroy the CM ID by returning a non-zero value. */ | |
1352 | id_priv->cm_id.iw = NULL; | |
1353 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1354 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1355 | rdma_destroy_id(&id_priv->id); |
1356 | return ret; | |
1357 | } | |
1358 | ||
de910bd9 | 1359 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1360 | return ret; |
1361 | } | |
1362 | ||
1363 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1364 | struct iw_cm_event *iw_event) | |
1365 | { | |
1366 | struct rdma_cm_id *new_cm_id; | |
1367 | struct rdma_id_private *listen_id, *conn_id; | |
1368 | struct sockaddr_in *sin; | |
1369 | struct net_device *dev = NULL; | |
a1b1b61f | 1370 | struct rdma_cm_event event; |
07ebafba | 1371 | int ret; |
8d8293cf | 1372 | struct ib_device_attr attr; |
07ebafba TT |
1373 | |
1374 | listen_id = cm_id->context; | |
de910bd9 | 1375 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1376 | return -ECONNABORTED; |
07ebafba TT |
1377 | |
1378 | /* Create a new RDMA id for the new IW CM ID */ | |
1379 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1380 | listen_id->id.context, | |
1381 | RDMA_PS_TCP); | |
10f32065 | 1382 | if (IS_ERR(new_cm_id)) { |
07ebafba TT |
1383 | ret = -ENOMEM; |
1384 | goto out; | |
1385 | } | |
1386 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
de910bd9 | 1387 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
07ebafba TT |
1388 | conn_id->state = CMA_CONNECT; |
1389 | ||
1ab35276 | 1390 | dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); |
07ebafba TT |
1391 | if (!dev) { |
1392 | ret = -EADDRNOTAVAIL; | |
de910bd9 | 1393 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1394 | rdma_destroy_id(new_cm_id); |
1395 | goto out; | |
1396 | } | |
1397 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1398 | if (ret) { | |
de910bd9 | 1399 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1400 | rdma_destroy_id(new_cm_id); |
1401 | goto out; | |
1402 | } | |
1403 | ||
61a73c70 | 1404 | mutex_lock(&lock); |
07ebafba | 1405 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1406 | mutex_unlock(&lock); |
07ebafba | 1407 | if (ret) { |
de910bd9 | 1408 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1409 | rdma_destroy_id(new_cm_id); |
1410 | goto out; | |
1411 | } | |
1412 | ||
1413 | conn_id->cm_id.iw = cm_id; | |
1414 | cm_id->context = conn_id; | |
1415 | cm_id->cm_handler = cma_iw_handler; | |
1416 | ||
1417 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1418 | *sin = iw_event->local_addr; | |
1419 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1420 | *sin = iw_event->remote_addr; | |
1421 | ||
8d8293cf SW |
1422 | ret = ib_query_device(conn_id->id.device, &attr); |
1423 | if (ret) { | |
de910bd9 | 1424 | mutex_unlock(&conn_id->handler_mutex); |
8d8293cf SW |
1425 | rdma_destroy_id(new_cm_id); |
1426 | goto out; | |
1427 | } | |
1428 | ||
a1b1b61f SH |
1429 | memset(&event, 0, sizeof event); |
1430 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1431 | event.param.conn.private_data = iw_event->private_data; | |
1432 | event.param.conn.private_data_len = iw_event->private_data_len; | |
8d8293cf SW |
1433 | event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; |
1434 | event.param.conn.responder_resources = attr.max_qp_rd_atom; | |
25ae21a1 SH |
1435 | |
1436 | /* | |
1437 | * Protect against the user destroying conn_id from another thread | |
1438 | * until we're done accessing it. | |
1439 | */ | |
1440 | atomic_inc(&conn_id->refcount); | |
a1b1b61f | 1441 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
07ebafba TT |
1442 | if (ret) { |
1443 | /* User wants to destroy the CM ID */ | |
1444 | conn_id->cm_id.iw = NULL; | |
1445 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1446 | mutex_unlock(&conn_id->handler_mutex); |
25ae21a1 | 1447 | cma_deref_id(conn_id); |
07ebafba | 1448 | rdma_destroy_id(&conn_id->id); |
de910bd9 | 1449 | goto out; |
07ebafba TT |
1450 | } |
1451 | ||
de910bd9 | 1452 | mutex_unlock(&conn_id->handler_mutex); |
25ae21a1 | 1453 | cma_deref_id(conn_id); |
de910bd9 | 1454 | |
07ebafba TT |
1455 | out: |
1456 | if (dev) | |
1457 | dev_put(dev); | |
de910bd9 | 1458 | mutex_unlock(&listen_id->handler_mutex); |
07ebafba TT |
1459 | return ret; |
1460 | } | |
1461 | ||
e51060f0 SH |
1462 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1463 | { | |
1464 | struct ib_cm_compare_data compare_data; | |
1465 | struct sockaddr *addr; | |
1466 | __be64 svc_id; | |
1467 | int ret; | |
1468 | ||
1469 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1470 | id_priv); | |
1471 | if (IS_ERR(id_priv->cm_id.ib)) | |
1472 | return PTR_ERR(id_priv->cm_id.ib); | |
1473 | ||
3f446754 | 1474 | addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
e51060f0 SH |
1475 | svc_id = cma_get_service_id(id_priv->id.ps, addr); |
1476 | if (cma_any_addr(addr)) | |
1477 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1478 | else { | |
1479 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1480 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1481 | } | |
1482 | ||
1483 | if (ret) { | |
1484 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1485 | id_priv->cm_id.ib = NULL; | |
1486 | } | |
1487 | ||
1488 | return ret; | |
1489 | } | |
1490 | ||
07ebafba TT |
1491 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1492 | { | |
1493 | int ret; | |
1494 | struct sockaddr_in *sin; | |
1495 | ||
1496 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1497 | iw_conn_req_handler, | |
1498 | id_priv); | |
1499 | if (IS_ERR(id_priv->cm_id.iw)) | |
1500 | return PTR_ERR(id_priv->cm_id.iw); | |
1501 | ||
1502 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1503 | id_priv->cm_id.iw->local_addr = *sin; | |
1504 | ||
1505 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1506 | ||
1507 | if (ret) { | |
1508 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1509 | id_priv->cm_id.iw = NULL; | |
1510 | } | |
1511 | ||
1512 | return ret; | |
1513 | } | |
1514 | ||
e51060f0 SH |
1515 | static int cma_listen_handler(struct rdma_cm_id *id, |
1516 | struct rdma_cm_event *event) | |
1517 | { | |
1518 | struct rdma_id_private *id_priv = id->context; | |
1519 | ||
1520 | id->context = id_priv->id.context; | |
1521 | id->event_handler = id_priv->id.event_handler; | |
1522 | return id_priv->id.event_handler(id, event); | |
1523 | } | |
1524 | ||
1525 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1526 | struct cma_device *cma_dev) | |
1527 | { | |
1528 | struct rdma_id_private *dev_id_priv; | |
1529 | struct rdma_cm_id *id; | |
1530 | int ret; | |
1531 | ||
1532 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1533 | if (IS_ERR(id)) | |
1534 | return; | |
1535 | ||
1536 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1537 | ||
1538 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1539 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
3f446754 | 1540 | ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); |
e51060f0 SH |
1541 | |
1542 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1543 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
d02d1f53 SH |
1544 | atomic_inc(&id_priv->refcount); |
1545 | dev_id_priv->internal_id = 1; | |
e51060f0 SH |
1546 | |
1547 | ret = rdma_listen(id, id_priv->backlog); | |
1548 | if (ret) | |
d02d1f53 | 1549 | printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " |
468f2239 | 1550 | "listening on device %s\n", ret, cma_dev->device->name); |
e51060f0 SH |
1551 | } |
1552 | ||
1553 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1554 | { | |
1555 | struct cma_device *cma_dev; | |
1556 | ||
1557 | mutex_lock(&lock); | |
1558 | list_add_tail(&id_priv->list, &listen_any_list); | |
1559 | list_for_each_entry(cma_dev, &dev_list, list) | |
1560 | cma_listen_on_dev(id_priv, cma_dev); | |
1561 | mutex_unlock(&lock); | |
1562 | } | |
1563 | ||
e51060f0 SH |
1564 | int rdma_listen(struct rdma_cm_id *id, int backlog) |
1565 | { | |
1566 | struct rdma_id_private *id_priv; | |
1567 | int ret; | |
1568 | ||
1569 | id_priv = container_of(id, struct rdma_id_private, id); | |
1570 | if (id_priv->state == CMA_IDLE) { | |
d14714df SH |
1571 | ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; |
1572 | ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); | |
e51060f0 SH |
1573 | if (ret) |
1574 | return ret; | |
1575 | } | |
1576 | ||
1577 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1578 | return -EINVAL; | |
1579 | ||
1580 | id_priv->backlog = backlog; | |
1581 | if (id->device) { | |
07ebafba TT |
1582 | switch (rdma_node_get_transport(id->device->node_type)) { |
1583 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1584 | ret = cma_ib_listen(id_priv); |
1585 | if (ret) | |
1586 | goto err; | |
1587 | break; | |
07ebafba TT |
1588 | case RDMA_TRANSPORT_IWARP: |
1589 | ret = cma_iw_listen(id_priv, backlog); | |
1590 | if (ret) | |
1591 | goto err; | |
1592 | break; | |
e51060f0 SH |
1593 | default: |
1594 | ret = -ENOSYS; | |
1595 | goto err; | |
1596 | } | |
1597 | } else | |
1598 | cma_listen_on_all(id_priv); | |
1599 | ||
1600 | return 0; | |
1601 | err: | |
1602 | id_priv->backlog = 0; | |
1603 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1604 | return ret; | |
1605 | } | |
1606 | EXPORT_SYMBOL(rdma_listen); | |
1607 | ||
a81c994d SH |
1608 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
1609 | { | |
1610 | struct rdma_id_private *id_priv; | |
1611 | ||
1612 | id_priv = container_of(id, struct rdma_id_private, id); | |
1613 | id_priv->tos = (u8) tos; | |
1614 | } | |
1615 | EXPORT_SYMBOL(rdma_set_service_type); | |
1616 | ||
e51060f0 SH |
1617 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
1618 | void *context) | |
1619 | { | |
1620 | struct cma_work *work = context; | |
1621 | struct rdma_route *route; | |
1622 | ||
1623 | route = &work->id->id.route; | |
1624 | ||
1625 | if (!status) { | |
1626 | route->num_paths = 1; | |
1627 | *route->path_rec = *path_rec; | |
1628 | } else { | |
1629 | work->old_state = CMA_ROUTE_QUERY; | |
1630 | work->new_state = CMA_ADDR_RESOLVED; | |
1631 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1632 | work->event.status = status; |
e51060f0 SH |
1633 | } |
1634 | ||
1635 | queue_work(cma_wq, &work->work); | |
1636 | } | |
1637 | ||
1638 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1639 | struct cma_work *work) | |
1640 | { | |
a81c994d | 1641 | struct rdma_addr *addr = &id_priv->id.route.addr; |
e51060f0 | 1642 | struct ib_sa_path_rec path_rec; |
a81c994d SH |
1643 | ib_sa_comp_mask comp_mask; |
1644 | struct sockaddr_in6 *sin6; | |
e51060f0 SH |
1645 | |
1646 | memset(&path_rec, 0, sizeof path_rec); | |
6f8372b6 SH |
1647 | rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
1648 | rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); | |
a81c994d | 1649 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); |
e51060f0 | 1650 | path_rec.numb_path = 1; |
962063e6 | 1651 | path_rec.reversible = 1; |
3f446754 RD |
1652 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, |
1653 | (struct sockaddr *) &addr->dst_addr); | |
a81c994d SH |
1654 | |
1655 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1656 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | | |
1657 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; | |
1658 | ||
3f446754 | 1659 | if (addr->src_addr.ss_family == AF_INET) { |
a81c994d SH |
1660 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); |
1661 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; | |
1662 | } else { | |
1663 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; | |
1664 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); | |
1665 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; | |
1666 | } | |
e51060f0 | 1667 | |
c1a0b23b | 1668 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
a81c994d SH |
1669 | id_priv->id.port_num, &path_rec, |
1670 | comp_mask, timeout_ms, | |
1671 | GFP_KERNEL, cma_query_handler, | |
1672 | work, &id_priv->query); | |
e51060f0 SH |
1673 | |
1674 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1675 | } | |
1676 | ||
c4028958 | 1677 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1678 | { |
c4028958 | 1679 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1680 | struct rdma_id_private *id_priv = work->id; |
1681 | int destroy = 0; | |
1682 | ||
de910bd9 | 1683 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
1684 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) |
1685 | goto out; | |
1686 | ||
1687 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1688 | cma_exch(id_priv, CMA_DESTROYING); | |
1689 | destroy = 1; | |
1690 | } | |
1691 | out: | |
de910bd9 | 1692 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1693 | cma_deref_id(id_priv); |
1694 | if (destroy) | |
1695 | rdma_destroy_id(&id_priv->id); | |
1696 | kfree(work); | |
1697 | } | |
1698 | ||
dd5bdff8 OG |
1699 | static void cma_ndev_work_handler(struct work_struct *_work) |
1700 | { | |
1701 | struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); | |
1702 | struct rdma_id_private *id_priv = work->id; | |
1703 | int destroy = 0; | |
1704 | ||
1705 | mutex_lock(&id_priv->handler_mutex); | |
1706 | if (id_priv->state == CMA_DESTROYING || | |
1707 | id_priv->state == CMA_DEVICE_REMOVAL) | |
1708 | goto out; | |
1709 | ||
1710 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1711 | cma_exch(id_priv, CMA_DESTROYING); | |
1712 | destroy = 1; | |
1713 | } | |
1714 | ||
1715 | out: | |
1716 | mutex_unlock(&id_priv->handler_mutex); | |
1717 | cma_deref_id(id_priv); | |
1718 | if (destroy) | |
1719 | rdma_destroy_id(&id_priv->id); | |
1720 | kfree(work); | |
1721 | } | |
1722 | ||
e51060f0 SH |
1723 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) |
1724 | { | |
1725 | struct rdma_route *route = &id_priv->id.route; | |
1726 | struct cma_work *work; | |
1727 | int ret; | |
1728 | ||
1729 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1730 | if (!work) | |
1731 | return -ENOMEM; | |
1732 | ||
1733 | work->id = id_priv; | |
c4028958 | 1734 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1735 | work->old_state = CMA_ROUTE_QUERY; |
1736 | work->new_state = CMA_ROUTE_RESOLVED; | |
1737 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1738 | ||
1739 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1740 | if (!route->path_rec) { | |
1741 | ret = -ENOMEM; | |
1742 | goto err1; | |
1743 | } | |
1744 | ||
1745 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1746 | if (ret) | |
1747 | goto err2; | |
1748 | ||
1749 | return 0; | |
1750 | err2: | |
1751 | kfree(route->path_rec); | |
1752 | route->path_rec = NULL; | |
1753 | err1: | |
1754 | kfree(work); | |
1755 | return ret; | |
1756 | } | |
1757 | ||
1758 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1759 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1760 | { | |
1761 | struct rdma_id_private *id_priv; | |
1762 | int ret; | |
1763 | ||
1764 | id_priv = container_of(id, struct rdma_id_private, id); | |
1765 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1766 | return -EINVAL; | |
1767 | ||
9893e742 JL |
1768 | id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, |
1769 | GFP_KERNEL); | |
e51060f0 SH |
1770 | if (!id->route.path_rec) { |
1771 | ret = -ENOMEM; | |
1772 | goto err; | |
1773 | } | |
1774 | ||
ae2d9293 | 1775 | id->route.num_paths = num_paths; |
e51060f0 SH |
1776 | return 0; |
1777 | err: | |
1778 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1779 | return ret; | |
1780 | } | |
1781 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1782 | ||
07ebafba TT |
1783 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1784 | { | |
1785 | struct cma_work *work; | |
1786 | ||
1787 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1788 | if (!work) | |
1789 | return -ENOMEM; | |
1790 | ||
1791 | work->id = id_priv; | |
c4028958 | 1792 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1793 | work->old_state = CMA_ROUTE_QUERY; |
1794 | work->new_state = CMA_ROUTE_RESOLVED; | |
1795 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1796 | queue_work(cma_wq, &work->work); | |
1797 | return 0; | |
1798 | } | |
1799 | ||
3c86aa70 EC |
1800 | static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) |
1801 | { | |
1802 | struct rdma_route *route = &id_priv->id.route; | |
1803 | struct rdma_addr *addr = &route->addr; | |
1804 | struct cma_work *work; | |
1805 | int ret; | |
1806 | struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; | |
1807 | struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; | |
1808 | struct net_device *ndev = NULL; | |
af7bd463 | 1809 | u16 vid; |
3c86aa70 EC |
1810 | |
1811 | if (src_addr->sin_family != dst_addr->sin_family) | |
1812 | return -EINVAL; | |
1813 | ||
1814 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1815 | if (!work) | |
1816 | return -ENOMEM; | |
1817 | ||
1818 | work->id = id_priv; | |
1819 | INIT_WORK(&work->work, cma_work_handler); | |
1820 | ||
1821 | route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1822 | if (!route->path_rec) { | |
1823 | ret = -ENOMEM; | |
1824 | goto err1; | |
1825 | } | |
1826 | ||
1827 | route->num_paths = 1; | |
1828 | ||
3c86aa70 EC |
1829 | if (addr->dev_addr.bound_dev_if) |
1830 | ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); | |
1831 | if (!ndev) { | |
1832 | ret = -ENODEV; | |
1833 | goto err2; | |
1834 | } | |
1835 | ||
af7bd463 EC |
1836 | vid = rdma_vlan_dev_vlan_id(ndev); |
1837 | ||
1838 | iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); | |
1839 | iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); | |
1840 | ||
1841 | route->path_rec->hop_limit = 1; | |
1842 | route->path_rec->reversible = 1; | |
1843 | route->path_rec->pkey = cpu_to_be16(0xffff); | |
1844 | route->path_rec->mtu_selector = IB_SA_EQ; | |
1845 | route->path_rec->sl = id_priv->tos >> 5; | |
1846 | ||
3c86aa70 EC |
1847 | route->path_rec->mtu = iboe_get_mtu(ndev->mtu); |
1848 | route->path_rec->rate_selector = IB_SA_EQ; | |
1849 | route->path_rec->rate = iboe_get_rate(ndev); | |
1850 | dev_put(ndev); | |
1851 | route->path_rec->packet_life_time_selector = IB_SA_EQ; | |
1852 | route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; | |
1853 | if (!route->path_rec->mtu) { | |
1854 | ret = -EINVAL; | |
1855 | goto err2; | |
1856 | } | |
1857 | ||
1858 | work->old_state = CMA_ROUTE_QUERY; | |
1859 | work->new_state = CMA_ROUTE_RESOLVED; | |
1860 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1861 | work->event.status = 0; | |
1862 | ||
1863 | queue_work(cma_wq, &work->work); | |
1864 | ||
1865 | return 0; | |
1866 | ||
1867 | err2: | |
1868 | kfree(route->path_rec); | |
1869 | route->path_rec = NULL; | |
1870 | err1: | |
1871 | kfree(work); | |
1872 | return ret; | |
1873 | } | |
1874 | ||
e51060f0 SH |
1875 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1876 | { | |
1877 | struct rdma_id_private *id_priv; | |
1878 | int ret; | |
1879 | ||
1880 | id_priv = container_of(id, struct rdma_id_private, id); | |
1881 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1882 | return -EINVAL; | |
1883 | ||
1884 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1885 | switch (rdma_node_get_transport(id->device->node_type)) { |
1886 | case RDMA_TRANSPORT_IB: | |
3c86aa70 EC |
1887 | switch (rdma_port_get_link_layer(id->device, id->port_num)) { |
1888 | case IB_LINK_LAYER_INFINIBAND: | |
1889 | ret = cma_resolve_ib_route(id_priv, timeout_ms); | |
1890 | break; | |
1891 | case IB_LINK_LAYER_ETHERNET: | |
1892 | ret = cma_resolve_iboe_route(id_priv); | |
1893 | break; | |
1894 | default: | |
1895 | ret = -ENOSYS; | |
1896 | } | |
e51060f0 | 1897 | break; |
07ebafba TT |
1898 | case RDMA_TRANSPORT_IWARP: |
1899 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1900 | break; | |
e51060f0 SH |
1901 | default: |
1902 | ret = -ENOSYS; | |
1903 | break; | |
1904 | } | |
1905 | if (ret) | |
1906 | goto err; | |
1907 | ||
1908 | return 0; | |
1909 | err: | |
1910 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1911 | cma_deref_id(id_priv); | |
1912 | return ret; | |
1913 | } | |
1914 | EXPORT_SYMBOL(rdma_resolve_route); | |
1915 | ||
1916 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1917 | { | |
1918 | struct cma_device *cma_dev; | |
1919 | struct ib_port_attr port_attr; | |
f0ee3404 | 1920 | union ib_gid gid; |
e51060f0 SH |
1921 | u16 pkey; |
1922 | int ret; | |
1923 | u8 p; | |
1924 | ||
1925 | mutex_lock(&lock); | |
e82153b5 KK |
1926 | if (list_empty(&dev_list)) { |
1927 | ret = -ENODEV; | |
1928 | goto out; | |
1929 | } | |
e51060f0 SH |
1930 | list_for_each_entry(cma_dev, &dev_list, list) |
1931 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1932 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1933 | port_attr.state == IB_PORT_ACTIVE) |
1934 | goto port_found; | |
1935 | ||
e82153b5 KK |
1936 | p = 1; |
1937 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1938 | |
1939 | port_found: | |
f0ee3404 | 1940 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1941 | if (ret) |
1942 | goto out; | |
1943 | ||
1944 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1945 | if (ret) | |
1946 | goto out; | |
1947 | ||
6f8372b6 | 1948 | id_priv->id.route.addr.dev_addr.dev_type = |
3c86aa70 | 1949 | (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? |
6f8372b6 SH |
1950 | ARPHRD_INFINIBAND : ARPHRD_ETHER; |
1951 | ||
1952 | rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1953 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1954 | id_priv->id.port_num = p; | |
1955 | cma_attach_to_dev(id_priv, cma_dev); | |
1956 | out: | |
1957 | mutex_unlock(&lock); | |
1958 | return ret; | |
1959 | } | |
1960 | ||
1961 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1962 | struct rdma_dev_addr *dev_addr, void *context) | |
1963 | { | |
1964 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1965 | struct rdma_cm_event event; |
e51060f0 | 1966 | |
a1b1b61f | 1967 | memset(&event, 0, sizeof event); |
de910bd9 | 1968 | mutex_lock(&id_priv->handler_mutex); |
61a73c70 SH |
1969 | |
1970 | /* | |
1971 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1972 | * we're trying to acquire it. | |
1973 | */ | |
1974 | mutex_lock(&lock); | |
1975 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1976 | mutex_unlock(&lock); | |
1977 | goto out; | |
1978 | } | |
1979 | ||
1980 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1981 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1982 | mutex_unlock(&lock); |
e51060f0 SH |
1983 | |
1984 | if (status) { | |
61a73c70 | 1985 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1986 | goto out; |
a1b1b61f SH |
1987 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1988 | event.status = status; | |
e51060f0 | 1989 | } else { |
e51060f0 SH |
1990 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1991 | ip_addr_size(src_addr)); | |
a1b1b61f | 1992 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1993 | } |
1994 | ||
a1b1b61f | 1995 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 | 1996 | cma_exch(id_priv, CMA_DESTROYING); |
de910bd9 | 1997 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1998 | cma_deref_id(id_priv); |
1999 | rdma_destroy_id(&id_priv->id); | |
2000 | return; | |
2001 | } | |
2002 | out: | |
de910bd9 | 2003 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
2004 | cma_deref_id(id_priv); |
2005 | } | |
2006 | ||
2007 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
2008 | { | |
2009 | struct cma_work *work; | |
6f8372b6 | 2010 | struct sockaddr *src, *dst; |
f0ee3404 | 2011 | union ib_gid gid; |
e51060f0 SH |
2012 | int ret; |
2013 | ||
2014 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
2015 | if (!work) | |
2016 | return -ENOMEM; | |
2017 | ||
2018 | if (!id_priv->cma_dev) { | |
2019 | ret = cma_bind_loopback(id_priv); | |
2020 | if (ret) | |
2021 | goto err; | |
2022 | } | |
2023 | ||
6f8372b6 SH |
2024 | rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
2025 | rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 | 2026 | |
6f8372b6 SH |
2027 | src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
2028 | if (cma_zero_addr(src)) { | |
2029 | dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; | |
2030 | if ((src->sa_family = dst->sa_family) == AF_INET) { | |
2031 | ((struct sockaddr_in *) src)->sin_addr.s_addr = | |
2032 | ((struct sockaddr_in *) dst)->sin_addr.s_addr; | |
2033 | } else { | |
2034 | ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, | |
2035 | &((struct sockaddr_in6 *) dst)->sin6_addr); | |
2036 | } | |
e51060f0 SH |
2037 | } |
2038 | ||
2039 | work->id = id_priv; | |
c4028958 | 2040 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
2041 | work->old_state = CMA_ADDR_QUERY; |
2042 | work->new_state = CMA_ADDR_RESOLVED; | |
2043 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
2044 | queue_work(cma_wq, &work->work); | |
2045 | return 0; | |
2046 | err: | |
2047 | kfree(work); | |
2048 | return ret; | |
2049 | } | |
2050 | ||
2051 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
2052 | struct sockaddr *dst_addr) | |
2053 | { | |
d14714df SH |
2054 | if (!src_addr || !src_addr->sa_family) { |
2055 | src_addr = (struct sockaddr *) &id->route.addr.src_addr; | |
2056 | if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { | |
2057 | ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = | |
2058 | ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; | |
2059 | } | |
2060 | } | |
2061 | return rdma_bind_addr(id, src_addr); | |
e51060f0 SH |
2062 | } |
2063 | ||
2064 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
2065 | struct sockaddr *dst_addr, int timeout_ms) | |
2066 | { | |
2067 | struct rdma_id_private *id_priv; | |
2068 | int ret; | |
2069 | ||
2070 | id_priv = container_of(id, struct rdma_id_private, id); | |
2071 | if (id_priv->state == CMA_IDLE) { | |
2072 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
2073 | if (ret) | |
2074 | return ret; | |
2075 | } | |
2076 | ||
2077 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
2078 | return -EINVAL; | |
2079 | ||
2080 | atomic_inc(&id_priv->refcount); | |
2081 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
2082 | if (cma_any_addr(dst_addr)) | |
2083 | ret = cma_resolve_loopback(id_priv); | |
2084 | else | |
3f446754 | 2085 | ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, |
7a118df3 | 2086 | dst_addr, &id->route.addr.dev_addr, |
e51060f0 SH |
2087 | timeout_ms, addr_handler, id_priv); |
2088 | if (ret) | |
2089 | goto err; | |
2090 | ||
2091 | return 0; | |
2092 | err: | |
2093 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
2094 | cma_deref_id(id_priv); | |
2095 | return ret; | |
2096 | } | |
2097 | EXPORT_SYMBOL(rdma_resolve_addr); | |
2098 | ||
2099 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
2100 | struct rdma_id_private *id_priv) | |
2101 | { | |
2102 | struct sockaddr_in *sin; | |
2103 | ||
2104 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
2105 | sin->sin_port = htons(bind_list->port); | |
2106 | id_priv->bind_list = bind_list; | |
2107 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
2108 | } | |
2109 | ||
2110 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
2111 | unsigned short snum) | |
2112 | { | |
2113 | struct rdma_bind_list *bind_list; | |
aedec080 | 2114 | int port, ret; |
e51060f0 | 2115 | |
cb164b8c | 2116 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
e51060f0 SH |
2117 | if (!bind_list) |
2118 | return -ENOMEM; | |
2119 | ||
aedec080 SH |
2120 | do { |
2121 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
2122 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
2123 | ||
2124 | if (ret) | |
2125 | goto err1; | |
2126 | ||
2127 | if (port != snum) { | |
2128 | ret = -EADDRNOTAVAIL; | |
2129 | goto err2; | |
2130 | } | |
2131 | ||
2132 | bind_list->ps = ps; | |
2133 | bind_list->port = (unsigned short) port; | |
2134 | cma_bind_port(bind_list, id_priv); | |
2135 | return 0; | |
2136 | err2: | |
2137 | idr_remove(ps, port); | |
2138 | err1: | |
2139 | kfree(bind_list); | |
2140 | return ret; | |
2141 | } | |
e51060f0 | 2142 | |
aedec080 SH |
2143 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
2144 | { | |
5d7220e8 TH |
2145 | static unsigned int last_used_port; |
2146 | int low, high, remaining; | |
2147 | unsigned int rover; | |
e51060f0 | 2148 | |
227b60f5 | 2149 | inet_get_local_port_range(&low, &high); |
5d7220e8 TH |
2150 | remaining = (high - low) + 1; |
2151 | rover = net_random() % remaining + low; | |
2152 | retry: | |
2153 | if (last_used_port != rover && | |
2154 | !idr_find(ps, (unsigned short) rover)) { | |
2155 | int ret = cma_alloc_port(ps, id_priv, rover); | |
2156 | /* | |
2157 | * Remember previously used port number in order to avoid | |
2158 | * re-using same port immediately after it is closed. | |
2159 | */ | |
2160 | if (!ret) | |
2161 | last_used_port = rover; | |
2162 | if (ret != -EADDRNOTAVAIL) | |
2163 | return ret; | |
e51060f0 | 2164 | } |
5d7220e8 TH |
2165 | if (--remaining) { |
2166 | rover++; | |
2167 | if ((rover < low) || (rover > high)) | |
2168 | rover = low; | |
2169 | goto retry; | |
2170 | } | |
2171 | return -EADDRNOTAVAIL; | |
e51060f0 SH |
2172 | } |
2173 | ||
2174 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
2175 | { | |
2176 | struct rdma_id_private *cur_id; | |
2177 | struct sockaddr_in *sin, *cur_sin; | |
2178 | struct rdma_bind_list *bind_list; | |
2179 | struct hlist_node *node; | |
2180 | unsigned short snum; | |
2181 | ||
2182 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
2183 | snum = ntohs(sin->sin_port); | |
2184 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
2185 | return -EACCES; | |
2186 | ||
2187 | bind_list = idr_find(ps, snum); | |
2188 | if (!bind_list) | |
2189 | return cma_alloc_port(ps, id_priv, snum); | |
2190 | ||
2191 | /* | |
2192 | * We don't support binding to any address if anyone is bound to | |
2193 | * a specific address on the same port. | |
2194 | */ | |
3f446754 | 2195 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
e51060f0 SH |
2196 | return -EADDRNOTAVAIL; |
2197 | ||
2198 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
3f446754 | 2199 | if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr)) |
e51060f0 | 2200 | return -EADDRNOTAVAIL; |
3cd96564 | 2201 | |
e51060f0 SH |
2202 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
2203 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
2204 | return -EADDRINUSE; | |
2205 | } | |
2206 | ||
2207 | cma_bind_port(bind_list, id_priv); | |
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | static int cma_get_port(struct rdma_id_private *id_priv) | |
2212 | { | |
2213 | struct idr *ps; | |
2214 | int ret; | |
2215 | ||
2216 | switch (id_priv->id.ps) { | |
2217 | case RDMA_PS_SDP: | |
2218 | ps = &sdp_ps; | |
2219 | break; | |
2220 | case RDMA_PS_TCP: | |
2221 | ps = &tcp_ps; | |
2222 | break; | |
628e5f6d SH |
2223 | case RDMA_PS_UDP: |
2224 | ps = &udp_ps; | |
2225 | break; | |
c8f6a362 SH |
2226 | case RDMA_PS_IPOIB: |
2227 | ps = &ipoib_ps; | |
2228 | break; | |
e51060f0 SH |
2229 | default: |
2230 | return -EPROTONOSUPPORT; | |
2231 | } | |
2232 | ||
2233 | mutex_lock(&lock); | |
3f446754 | 2234 | if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
aedec080 | 2235 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
2236 | else |
2237 | ret = cma_use_port(ps, id_priv); | |
2238 | mutex_unlock(&lock); | |
2239 | ||
2240 | return ret; | |
2241 | } | |
2242 | ||
d14714df SH |
2243 | static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, |
2244 | struct sockaddr *addr) | |
2245 | { | |
fd4582a3 | 2246 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
d14714df SH |
2247 | struct sockaddr_in6 *sin6; |
2248 | ||
2249 | if (addr->sa_family != AF_INET6) | |
2250 | return 0; | |
2251 | ||
2252 | sin6 = (struct sockaddr_in6 *) addr; | |
2253 | if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && | |
2254 | !sin6->sin6_scope_id) | |
2255 | return -EINVAL; | |
2256 | ||
2257 | dev_addr->bound_dev_if = sin6->sin6_scope_id; | |
2258 | #endif | |
2259 | return 0; | |
2260 | } | |
2261 | ||
e51060f0 SH |
2262 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) |
2263 | { | |
2264 | struct rdma_id_private *id_priv; | |
2265 | int ret; | |
2266 | ||
1f5175ad | 2267 | if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) |
e51060f0 SH |
2268 | return -EAFNOSUPPORT; |
2269 | ||
2270 | id_priv = container_of(id, struct rdma_id_private, id); | |
2271 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
2272 | return -EINVAL; | |
2273 | ||
d14714df SH |
2274 | ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); |
2275 | if (ret) | |
2276 | goto err1; | |
2277 | ||
8523c048 | 2278 | if (!cma_any_addr(addr)) { |
e51060f0 | 2279 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); |
e51060f0 | 2280 | if (ret) |
255d0c14 KK |
2281 | goto err1; |
2282 | ||
2283 | mutex_lock(&lock); | |
2284 | ret = cma_acquire_dev(id_priv); | |
2285 | mutex_unlock(&lock); | |
2286 | if (ret) | |
2287 | goto err1; | |
e51060f0 SH |
2288 | } |
2289 | ||
2290 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
2291 | ret = cma_get_port(id_priv); | |
2292 | if (ret) | |
255d0c14 | 2293 | goto err2; |
e51060f0 SH |
2294 | |
2295 | return 0; | |
255d0c14 | 2296 | err2: |
6f8372b6 | 2297 | if (id_priv->cma_dev) { |
255d0c14 KK |
2298 | mutex_lock(&lock); |
2299 | cma_detach_from_dev(id_priv); | |
2300 | mutex_unlock(&lock); | |
2301 | } | |
2302 | err1: | |
e51060f0 SH |
2303 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
2304 | return ret; | |
2305 | } | |
2306 | EXPORT_SYMBOL(rdma_bind_addr); | |
2307 | ||
2308 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
2309 | struct rdma_route *route) | |
2310 | { | |
e51060f0 SH |
2311 | struct cma_hdr *cma_hdr; |
2312 | struct sdp_hh *sdp_hdr; | |
2313 | ||
1f5175ad AS |
2314 | if (route->addr.src_addr.ss_family == AF_INET) { |
2315 | struct sockaddr_in *src4, *dst4; | |
2316 | ||
2317 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
2318 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
2319 | ||
2320 | switch (ps) { | |
2321 | case RDMA_PS_SDP: | |
2322 | sdp_hdr = hdr; | |
2323 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2324 | return -EINVAL; | |
2325 | sdp_set_ip_ver(sdp_hdr, 4); | |
2326 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2327 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2328 | sdp_hdr->port = src4->sin_port; | |
2329 | break; | |
2330 | default: | |
2331 | cma_hdr = hdr; | |
2332 | cma_hdr->cma_version = CMA_VERSION; | |
2333 | cma_set_ip_ver(cma_hdr, 4); | |
2334 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2335 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2336 | cma_hdr->port = src4->sin_port; | |
2337 | break; | |
2338 | } | |
2339 | } else { | |
2340 | struct sockaddr_in6 *src6, *dst6; | |
2341 | ||
2342 | src6 = (struct sockaddr_in6 *) &route->addr.src_addr; | |
2343 | dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; | |
2344 | ||
2345 | switch (ps) { | |
2346 | case RDMA_PS_SDP: | |
2347 | sdp_hdr = hdr; | |
2348 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2349 | return -EINVAL; | |
2350 | sdp_set_ip_ver(sdp_hdr, 6); | |
2351 | sdp_hdr->src_addr.ip6 = src6->sin6_addr; | |
2352 | sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2353 | sdp_hdr->port = src6->sin6_port; | |
2354 | break; | |
2355 | default: | |
2356 | cma_hdr = hdr; | |
2357 | cma_hdr->cma_version = CMA_VERSION; | |
2358 | cma_set_ip_ver(cma_hdr, 6); | |
2359 | cma_hdr->src_addr.ip6 = src6->sin6_addr; | |
2360 | cma_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2361 | cma_hdr->port = src6->sin6_port; | |
2362 | break; | |
2363 | } | |
e51060f0 SH |
2364 | } |
2365 | return 0; | |
2366 | } | |
2367 | ||
628e5f6d SH |
2368 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
2369 | struct ib_cm_event *ib_event) | |
2370 | { | |
2371 | struct rdma_id_private *id_priv = cm_id->context; | |
2372 | struct rdma_cm_event event; | |
2373 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
2374 | int ret = 0; | |
2375 | ||
de910bd9 | 2376 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
8aa08602 | 2377 | return 0; |
628e5f6d | 2378 | |
8aa08602 | 2379 | memset(&event, 0, sizeof event); |
628e5f6d SH |
2380 | switch (ib_event->event) { |
2381 | case IB_CM_SIDR_REQ_ERROR: | |
2382 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2383 | event.status = -ETIMEDOUT; | |
2384 | break; | |
2385 | case IB_CM_SIDR_REP_RECEIVED: | |
2386 | event.param.ud.private_data = ib_event->private_data; | |
2387 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
2388 | if (rep->status != IB_SIDR_SUCCESS) { | |
2389 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2390 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
2391 | break; | |
2392 | } | |
d2ca39f2 YE |
2393 | ret = cma_set_qkey(id_priv); |
2394 | if (ret) { | |
2395 | event.event = RDMA_CM_EVENT_ADDR_ERROR; | |
2396 | event.status = -EINVAL; | |
2397 | break; | |
2398 | } | |
c8f6a362 | 2399 | if (id_priv->qkey != rep->qkey) { |
628e5f6d SH |
2400 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
2401 | event.status = -EINVAL; | |
2402 | break; | |
2403 | } | |
2404 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
2405 | id_priv->id.route.path_rec, | |
2406 | &event.param.ud.ah_attr); | |
2407 | event.param.ud.qp_num = rep->qpn; | |
2408 | event.param.ud.qkey = rep->qkey; | |
2409 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
2410 | event.status = 0; | |
2411 | break; | |
2412 | default: | |
468f2239 | 2413 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
628e5f6d SH |
2414 | ib_event->event); |
2415 | goto out; | |
2416 | } | |
2417 | ||
2418 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2419 | if (ret) { | |
2420 | /* Destroy the CM ID by returning a non-zero value. */ | |
2421 | id_priv->cm_id.ib = NULL; | |
2422 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2423 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2424 | rdma_destroy_id(&id_priv->id); |
2425 | return ret; | |
2426 | } | |
2427 | out: | |
de910bd9 | 2428 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2429 | return ret; |
2430 | } | |
2431 | ||
2432 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
2433 | struct rdma_conn_param *conn_param) | |
2434 | { | |
2435 | struct ib_cm_sidr_req_param req; | |
2436 | struct rdma_route *route; | |
2437 | int ret; | |
2438 | ||
2439 | req.private_data_len = sizeof(struct cma_hdr) + | |
2440 | conn_param->private_data_len; | |
2441 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2442 | if (!req.private_data) | |
2443 | return -ENOMEM; | |
2444 | ||
2445 | if (conn_param->private_data && conn_param->private_data_len) | |
2446 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2447 | conn_param->private_data, conn_param->private_data_len); | |
2448 | ||
2449 | route = &id_priv->id.route; | |
2450 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2451 | if (ret) | |
2452 | goto out; | |
2453 | ||
2454 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2455 | cma_sidr_rep_handler, id_priv); | |
2456 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2457 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2458 | goto out; | |
2459 | } | |
2460 | ||
2461 | req.path = route->path_rec; | |
2462 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2463 | (struct sockaddr *) &route->addr.dst_addr); |
628e5f6d SH |
2464 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); |
2465 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2466 | ||
2467 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2468 | if (ret) { | |
2469 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2470 | id_priv->cm_id.ib = NULL; | |
2471 | } | |
2472 | out: | |
2473 | kfree(req.private_data); | |
2474 | return ret; | |
2475 | } | |
2476 | ||
e51060f0 SH |
2477 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2478 | struct rdma_conn_param *conn_param) | |
2479 | { | |
2480 | struct ib_cm_req_param req; | |
2481 | struct rdma_route *route; | |
2482 | void *private_data; | |
2483 | int offset, ret; | |
2484 | ||
2485 | memset(&req, 0, sizeof req); | |
2486 | offset = cma_user_data_offset(id_priv->id.ps); | |
2487 | req.private_data_len = offset + conn_param->private_data_len; | |
2488 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2489 | if (!private_data) | |
2490 | return -ENOMEM; | |
2491 | ||
2492 | if (conn_param->private_data && conn_param->private_data_len) | |
2493 | memcpy(private_data + offset, conn_param->private_data, | |
2494 | conn_param->private_data_len); | |
2495 | ||
2496 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2497 | id_priv); | |
2498 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2499 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2500 | goto out; | |
2501 | } | |
2502 | ||
2503 | route = &id_priv->id.route; | |
2504 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2505 | if (ret) | |
2506 | goto out; | |
2507 | req.private_data = private_data; | |
2508 | ||
2509 | req.primary_path = &route->path_rec[0]; | |
2510 | if (route->num_paths == 2) | |
2511 | req.alternate_path = &route->path_rec[1]; | |
2512 | ||
2513 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2514 | (struct sockaddr *) &route->addr.dst_addr); |
e51060f0 | 2515 | req.qp_num = id_priv->qp_num; |
9b2e9c0c | 2516 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2517 | req.starting_psn = id_priv->seq_num; |
2518 | req.responder_resources = conn_param->responder_resources; | |
2519 | req.initiator_depth = conn_param->initiator_depth; | |
2520 | req.flow_control = conn_param->flow_control; | |
2521 | req.retry_count = conn_param->retry_count; | |
2522 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2523 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2524 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2525 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2526 | req.srq = id_priv->srq ? 1 : 0; | |
2527 | ||
2528 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2529 | out: | |
675a027c KK |
2530 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2531 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2532 | id_priv->cm_id.ib = NULL; | |
2533 | } | |
2534 | ||
e51060f0 SH |
2535 | kfree(private_data); |
2536 | return ret; | |
2537 | } | |
2538 | ||
07ebafba TT |
2539 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2540 | struct rdma_conn_param *conn_param) | |
2541 | { | |
2542 | struct iw_cm_id *cm_id; | |
2543 | struct sockaddr_in* sin; | |
2544 | int ret; | |
2545 | struct iw_cm_conn_param iw_param; | |
2546 | ||
2547 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2548 | if (IS_ERR(cm_id)) { | |
2549 | ret = PTR_ERR(cm_id); | |
2550 | goto out; | |
2551 | } | |
2552 | ||
2553 | id_priv->cm_id.iw = cm_id; | |
2554 | ||
2555 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2556 | cm_id->local_addr = *sin; | |
2557 | ||
2558 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2559 | cm_id->remote_addr = *sin; | |
2560 | ||
5851bb89 | 2561 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
675a027c KK |
2562 | if (ret) |
2563 | goto out; | |
07ebafba TT |
2564 | |
2565 | iw_param.ord = conn_param->initiator_depth; | |
2566 | iw_param.ird = conn_param->responder_resources; | |
2567 | iw_param.private_data = conn_param->private_data; | |
2568 | iw_param.private_data_len = conn_param->private_data_len; | |
2569 | if (id_priv->id.qp) | |
2570 | iw_param.qpn = id_priv->qp_num; | |
2571 | else | |
2572 | iw_param.qpn = conn_param->qp_num; | |
2573 | ret = iw_cm_connect(cm_id, &iw_param); | |
2574 | out: | |
675a027c KK |
2575 | if (ret && !IS_ERR(cm_id)) { |
2576 | iw_destroy_cm_id(cm_id); | |
2577 | id_priv->cm_id.iw = NULL; | |
2578 | } | |
07ebafba TT |
2579 | return ret; |
2580 | } | |
2581 | ||
e51060f0 SH |
2582 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2583 | { | |
2584 | struct rdma_id_private *id_priv; | |
2585 | int ret; | |
2586 | ||
2587 | id_priv = container_of(id, struct rdma_id_private, id); | |
2588 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2589 | return -EINVAL; | |
2590 | ||
2591 | if (!id->qp) { | |
2592 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2593 | id_priv->srq = conn_param->srq; |
2594 | } | |
2595 | ||
07ebafba TT |
2596 | switch (rdma_node_get_transport(id->device->node_type)) { |
2597 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2598 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2599 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
2600 | else | |
2601 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2602 | break; |
07ebafba TT |
2603 | case RDMA_TRANSPORT_IWARP: |
2604 | ret = cma_connect_iw(id_priv, conn_param); | |
2605 | break; | |
e51060f0 SH |
2606 | default: |
2607 | ret = -ENOSYS; | |
2608 | break; | |
2609 | } | |
2610 | if (ret) | |
2611 | goto err; | |
2612 | ||
2613 | return 0; | |
2614 | err: | |
2615 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2616 | return ret; | |
2617 | } | |
2618 | EXPORT_SYMBOL(rdma_connect); | |
2619 | ||
2620 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2621 | struct rdma_conn_param *conn_param) | |
2622 | { | |
2623 | struct ib_cm_rep_param rep; | |
5851bb89 | 2624 | int ret; |
0fe313b0 | 2625 | |
5851bb89 SH |
2626 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
2627 | if (ret) | |
2628 | goto out; | |
0fe313b0 | 2629 | |
5851bb89 SH |
2630 | ret = cma_modify_qp_rts(id_priv, conn_param); |
2631 | if (ret) | |
2632 | goto out; | |
e51060f0 SH |
2633 | |
2634 | memset(&rep, 0, sizeof rep); | |
2635 | rep.qp_num = id_priv->qp_num; | |
2636 | rep.starting_psn = id_priv->seq_num; | |
2637 | rep.private_data = conn_param->private_data; | |
2638 | rep.private_data_len = conn_param->private_data_len; | |
2639 | rep.responder_resources = conn_param->responder_resources; | |
2640 | rep.initiator_depth = conn_param->initiator_depth; | |
e51060f0 SH |
2641 | rep.failover_accepted = 0; |
2642 | rep.flow_control = conn_param->flow_control; | |
2643 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2644 | rep.srq = id_priv->srq ? 1 : 0; | |
2645 | ||
0fe313b0 SH |
2646 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2647 | out: | |
2648 | return ret; | |
e51060f0 SH |
2649 | } |
2650 | ||
07ebafba TT |
2651 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2652 | struct rdma_conn_param *conn_param) | |
2653 | { | |
2654 | struct iw_cm_conn_param iw_param; | |
2655 | int ret; | |
2656 | ||
5851bb89 | 2657 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
07ebafba TT |
2658 | if (ret) |
2659 | return ret; | |
2660 | ||
2661 | iw_param.ord = conn_param->initiator_depth; | |
2662 | iw_param.ird = conn_param->responder_resources; | |
2663 | iw_param.private_data = conn_param->private_data; | |
2664 | iw_param.private_data_len = conn_param->private_data_len; | |
2665 | if (id_priv->id.qp) { | |
2666 | iw_param.qpn = id_priv->qp_num; | |
2667 | } else | |
2668 | iw_param.qpn = conn_param->qp_num; | |
2669 | ||
2670 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2671 | } | |
2672 | ||
628e5f6d SH |
2673 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2674 | enum ib_cm_sidr_status status, | |
2675 | const void *private_data, int private_data_len) | |
2676 | { | |
2677 | struct ib_cm_sidr_rep_param rep; | |
d2ca39f2 | 2678 | int ret; |
628e5f6d SH |
2679 | |
2680 | memset(&rep, 0, sizeof rep); | |
2681 | rep.status = status; | |
2682 | if (status == IB_SIDR_SUCCESS) { | |
d2ca39f2 YE |
2683 | ret = cma_set_qkey(id_priv); |
2684 | if (ret) | |
2685 | return ret; | |
628e5f6d | 2686 | rep.qp_num = id_priv->qp_num; |
c8f6a362 | 2687 | rep.qkey = id_priv->qkey; |
628e5f6d SH |
2688 | } |
2689 | rep.private_data = private_data; | |
2690 | rep.private_data_len = private_data_len; | |
2691 | ||
2692 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2693 | } | |
2694 | ||
e51060f0 SH |
2695 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2696 | { | |
2697 | struct rdma_id_private *id_priv; | |
2698 | int ret; | |
2699 | ||
2700 | id_priv = container_of(id, struct rdma_id_private, id); | |
2701 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2702 | return -EINVAL; | |
2703 | ||
2704 | if (!id->qp && conn_param) { | |
2705 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2706 | id_priv->srq = conn_param->srq; |
2707 | } | |
2708 | ||
07ebafba TT |
2709 | switch (rdma_node_get_transport(id->device->node_type)) { |
2710 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2711 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2712 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
2713 | conn_param->private_data, | |
2714 | conn_param->private_data_len); | |
2715 | else if (conn_param) | |
e51060f0 SH |
2716 | ret = cma_accept_ib(id_priv, conn_param); |
2717 | else | |
2718 | ret = cma_rep_recv(id_priv); | |
2719 | break; | |
07ebafba TT |
2720 | case RDMA_TRANSPORT_IWARP: |
2721 | ret = cma_accept_iw(id_priv, conn_param); | |
2722 | break; | |
e51060f0 SH |
2723 | default: |
2724 | ret = -ENOSYS; | |
2725 | break; | |
2726 | } | |
2727 | ||
2728 | if (ret) | |
2729 | goto reject; | |
2730 | ||
2731 | return 0; | |
2732 | reject: | |
c5483388 | 2733 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
2734 | rdma_reject(id, NULL, 0); |
2735 | return ret; | |
2736 | } | |
2737 | EXPORT_SYMBOL(rdma_accept); | |
2738 | ||
0fe313b0 SH |
2739 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2740 | { | |
2741 | struct rdma_id_private *id_priv; | |
2742 | int ret; | |
2743 | ||
2744 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2745 | if (!cma_has_cm_dev(id_priv)) |
0fe313b0 SH |
2746 | return -EINVAL; |
2747 | ||
2748 | switch (id->device->node_type) { | |
2749 | case RDMA_NODE_IB_CA: | |
2750 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2751 | break; | |
2752 | default: | |
2753 | ret = 0; | |
2754 | break; | |
2755 | } | |
2756 | return ret; | |
2757 | } | |
2758 | EXPORT_SYMBOL(rdma_notify); | |
2759 | ||
e51060f0 SH |
2760 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2761 | u8 private_data_len) | |
2762 | { | |
2763 | struct rdma_id_private *id_priv; | |
2764 | int ret; | |
2765 | ||
2766 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2767 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2768 | return -EINVAL; |
2769 | ||
07ebafba TT |
2770 | switch (rdma_node_get_transport(id->device->node_type)) { |
2771 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2772 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2773 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
2774 | private_data, private_data_len); | |
2775 | else | |
2776 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2777 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2778 | 0, private_data, private_data_len); | |
e51060f0 | 2779 | break; |
07ebafba TT |
2780 | case RDMA_TRANSPORT_IWARP: |
2781 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2782 | private_data, private_data_len); | |
2783 | break; | |
e51060f0 SH |
2784 | default: |
2785 | ret = -ENOSYS; | |
2786 | break; | |
2787 | } | |
2788 | return ret; | |
2789 | } | |
2790 | EXPORT_SYMBOL(rdma_reject); | |
2791 | ||
2792 | int rdma_disconnect(struct rdma_cm_id *id) | |
2793 | { | |
2794 | struct rdma_id_private *id_priv; | |
2795 | int ret; | |
2796 | ||
2797 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2798 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2799 | return -EINVAL; |
2800 | ||
07ebafba TT |
2801 | switch (rdma_node_get_transport(id->device->node_type)) { |
2802 | case RDMA_TRANSPORT_IB: | |
c5483388 | 2803 | ret = cma_modify_qp_err(id_priv); |
07ebafba TT |
2804 | if (ret) |
2805 | goto out; | |
e51060f0 SH |
2806 | /* Initiate or respond to a disconnect. */ |
2807 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2808 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2809 | break; | |
07ebafba TT |
2810 | case RDMA_TRANSPORT_IWARP: |
2811 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2812 | break; | |
e51060f0 | 2813 | default: |
07ebafba | 2814 | ret = -EINVAL; |
e51060f0 SH |
2815 | break; |
2816 | } | |
2817 | out: | |
2818 | return ret; | |
2819 | } | |
2820 | EXPORT_SYMBOL(rdma_disconnect); | |
2821 | ||
c8f6a362 SH |
2822 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
2823 | { | |
2824 | struct rdma_id_private *id_priv; | |
2825 | struct cma_multicast *mc = multicast->context; | |
2826 | struct rdma_cm_event event; | |
2827 | int ret; | |
2828 | ||
2829 | id_priv = mc->id_priv; | |
de910bd9 OG |
2830 | if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && |
2831 | cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) | |
8aa08602 | 2832 | return 0; |
c8f6a362 | 2833 | |
c5483388 | 2834 | mutex_lock(&id_priv->qp_mutex); |
c8f6a362 SH |
2835 | if (!status && id_priv->id.qp) |
2836 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, | |
2837 | multicast->rec.mlid); | |
c5483388 | 2838 | mutex_unlock(&id_priv->qp_mutex); |
c8f6a362 SH |
2839 | |
2840 | memset(&event, 0, sizeof event); | |
2841 | event.status = status; | |
2842 | event.param.ud.private_data = mc->context; | |
2843 | if (!status) { | |
2844 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; | |
2845 | ib_init_ah_from_mcmember(id_priv->id.device, | |
2846 | id_priv->id.port_num, &multicast->rec, | |
2847 | &event.param.ud.ah_attr); | |
2848 | event.param.ud.qp_num = 0xFFFFFF; | |
2849 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); | |
2850 | } else | |
2851 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; | |
2852 | ||
2853 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2854 | if (ret) { | |
2855 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2856 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2857 | rdma_destroy_id(&id_priv->id); |
2858 | return 0; | |
2859 | } | |
8aa08602 | 2860 | |
de910bd9 | 2861 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2862 | return 0; |
2863 | } | |
2864 | ||
2865 | static void cma_set_mgid(struct rdma_id_private *id_priv, | |
2866 | struct sockaddr *addr, union ib_gid *mgid) | |
2867 | { | |
2868 | unsigned char mc_map[MAX_ADDR_LEN]; | |
2869 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2870 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; | |
2871 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; | |
2872 | ||
2873 | if (cma_any_addr(addr)) { | |
2874 | memset(mgid, 0, sizeof *mgid); | |
2875 | } else if ((addr->sa_family == AF_INET6) && | |
1c9b2819 | 2876 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == |
c8f6a362 SH |
2877 | 0xFF10A01B)) { |
2878 | /* IPv6 address is an SA assigned MGID. */ | |
2879 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
e2e62697 JG |
2880 | } else if ((addr->sa_family == AF_INET6)) { |
2881 | ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); | |
2882 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2883 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
2884 | *mgid = *(union ib_gid *) (mc_map + 4); | |
c8f6a362 | 2885 | } else { |
a9e527e3 | 2886 | ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); |
c8f6a362 SH |
2887 | if (id_priv->id.ps == RDMA_PS_UDP) |
2888 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
c8f6a362 SH |
2889 | *mgid = *(union ib_gid *) (mc_map + 4); |
2890 | } | |
2891 | } | |
2892 | ||
2893 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, | |
2894 | struct cma_multicast *mc) | |
2895 | { | |
2896 | struct ib_sa_mcmember_rec rec; | |
2897 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2898 | ib_sa_comp_mask comp_mask; | |
2899 | int ret; | |
2900 | ||
2901 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
2902 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, | |
2903 | &rec.mgid, &rec); | |
2904 | if (ret) | |
2905 | return ret; | |
2906 | ||
3f446754 | 2907 | cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); |
c8f6a362 SH |
2908 | if (id_priv->id.ps == RDMA_PS_UDP) |
2909 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
6f8372b6 | 2910 | rdma_addr_get_sgid(dev_addr, &rec.port_gid); |
c8f6a362 SH |
2911 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
2912 | rec.join_state = 1; | |
2913 | ||
2914 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | | |
2915 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | | |
2916 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | | |
2917 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
2918 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
2919 | ||
84adeee9 YE |
2920 | if (id_priv->id.ps == RDMA_PS_IPOIB) |
2921 | comp_mask |= IB_SA_MCMEMBER_REC_RATE | | |
2922 | IB_SA_MCMEMBER_REC_RATE_SELECTOR; | |
2923 | ||
c8f6a362 SH |
2924 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, |
2925 | id_priv->id.port_num, &rec, | |
2926 | comp_mask, GFP_KERNEL, | |
2927 | cma_ib_mc_handler, mc); | |
2928 | if (IS_ERR(mc->multicast.ib)) | |
2929 | return PTR_ERR(mc->multicast.ib); | |
2930 | ||
2931 | return 0; | |
2932 | } | |
2933 | ||
3c86aa70 EC |
2934 | static void iboe_mcast_work_handler(struct work_struct *work) |
2935 | { | |
2936 | struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); | |
2937 | struct cma_multicast *mc = mw->mc; | |
2938 | struct ib_sa_multicast *m = mc->multicast.ib; | |
2939 | ||
2940 | mc->multicast.ib->context = mc; | |
2941 | cma_ib_mc_handler(0, m); | |
2942 | kref_put(&mc->mcref, release_mc); | |
2943 | kfree(mw); | |
2944 | } | |
2945 | ||
2946 | static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) | |
2947 | { | |
2948 | struct sockaddr_in *sin = (struct sockaddr_in *)addr; | |
2949 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; | |
2950 | ||
2951 | if (cma_any_addr(addr)) { | |
2952 | memset(mgid, 0, sizeof *mgid); | |
2953 | } else if (addr->sa_family == AF_INET6) { | |
2954 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
2955 | } else { | |
2956 | mgid->raw[0] = 0xff; | |
2957 | mgid->raw[1] = 0x0e; | |
2958 | mgid->raw[2] = 0; | |
2959 | mgid->raw[3] = 0; | |
2960 | mgid->raw[4] = 0; | |
2961 | mgid->raw[5] = 0; | |
2962 | mgid->raw[6] = 0; | |
2963 | mgid->raw[7] = 0; | |
2964 | mgid->raw[8] = 0; | |
2965 | mgid->raw[9] = 0; | |
2966 | mgid->raw[10] = 0xff; | |
2967 | mgid->raw[11] = 0xff; | |
2968 | *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; | |
2969 | } | |
2970 | } | |
2971 | ||
2972 | static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, | |
2973 | struct cma_multicast *mc) | |
2974 | { | |
2975 | struct iboe_mcast_work *work; | |
2976 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2977 | int err; | |
2978 | struct sockaddr *addr = (struct sockaddr *)&mc->addr; | |
2979 | struct net_device *ndev = NULL; | |
2980 | ||
2981 | if (cma_zero_addr((struct sockaddr *)&mc->addr)) | |
2982 | return -EINVAL; | |
2983 | ||
2984 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
2985 | if (!work) | |
2986 | return -ENOMEM; | |
2987 | ||
2988 | mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); | |
2989 | if (!mc->multicast.ib) { | |
2990 | err = -ENOMEM; | |
2991 | goto out1; | |
2992 | } | |
2993 | ||
2994 | cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); | |
2995 | ||
2996 | mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); | |
2997 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2998 | mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
2999 | ||
3000 | if (dev_addr->bound_dev_if) | |
3001 | ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); | |
3002 | if (!ndev) { | |
3003 | err = -ENODEV; | |
3004 | goto out2; | |
3005 | } | |
3006 | mc->multicast.ib->rec.rate = iboe_get_rate(ndev); | |
3007 | mc->multicast.ib->rec.hop_limit = 1; | |
3008 | mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); | |
3009 | dev_put(ndev); | |
3010 | if (!mc->multicast.ib->rec.mtu) { | |
3011 | err = -EINVAL; | |
3012 | goto out2; | |
3013 | } | |
3014 | iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); | |
3015 | work->id = id_priv; | |
3016 | work->mc = mc; | |
3017 | INIT_WORK(&work->work, iboe_mcast_work_handler); | |
3018 | kref_get(&mc->mcref); | |
3019 | queue_work(cma_wq, &work->work); | |
3020 | ||
3021 | return 0; | |
3022 | ||
3023 | out2: | |
3024 | kfree(mc->multicast.ib); | |
3025 | out1: | |
3026 | kfree(work); | |
3027 | return err; | |
3028 | } | |
3029 | ||
c8f6a362 SH |
3030 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, |
3031 | void *context) | |
3032 | { | |
3033 | struct rdma_id_private *id_priv; | |
3034 | struct cma_multicast *mc; | |
3035 | int ret; | |
3036 | ||
3037 | id_priv = container_of(id, struct rdma_id_private, id); | |
3038 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && | |
3039 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) | |
3040 | return -EINVAL; | |
3041 | ||
3042 | mc = kmalloc(sizeof *mc, GFP_KERNEL); | |
3043 | if (!mc) | |
3044 | return -ENOMEM; | |
3045 | ||
3046 | memcpy(&mc->addr, addr, ip_addr_size(addr)); | |
3047 | mc->context = context; | |
3048 | mc->id_priv = id_priv; | |
3049 | ||
3050 | spin_lock(&id_priv->lock); | |
3051 | list_add(&mc->list, &id_priv->mc_list); | |
3052 | spin_unlock(&id_priv->lock); | |
3053 | ||
3054 | switch (rdma_node_get_transport(id->device->node_type)) { | |
3055 | case RDMA_TRANSPORT_IB: | |
3c86aa70 EC |
3056 | switch (rdma_port_get_link_layer(id->device, id->port_num)) { |
3057 | case IB_LINK_LAYER_INFINIBAND: | |
3058 | ret = cma_join_ib_multicast(id_priv, mc); | |
3059 | break; | |
3060 | case IB_LINK_LAYER_ETHERNET: | |
3061 | kref_init(&mc->mcref); | |
3062 | ret = cma_iboe_join_multicast(id_priv, mc); | |
3063 | break; | |
3064 | default: | |
3065 | ret = -EINVAL; | |
3066 | } | |
c8f6a362 SH |
3067 | break; |
3068 | default: | |
3069 | ret = -ENOSYS; | |
3070 | break; | |
3071 | } | |
3072 | ||
3073 | if (ret) { | |
3074 | spin_lock_irq(&id_priv->lock); | |
3075 | list_del(&mc->list); | |
3076 | spin_unlock_irq(&id_priv->lock); | |
3077 | kfree(mc); | |
3078 | } | |
3079 | return ret; | |
3080 | } | |
3081 | EXPORT_SYMBOL(rdma_join_multicast); | |
3082 | ||
3083 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) | |
3084 | { | |
3085 | struct rdma_id_private *id_priv; | |
3086 | struct cma_multicast *mc; | |
3087 | ||
3088 | id_priv = container_of(id, struct rdma_id_private, id); | |
3089 | spin_lock_irq(&id_priv->lock); | |
3090 | list_for_each_entry(mc, &id_priv->mc_list, list) { | |
3091 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { | |
3092 | list_del(&mc->list); | |
3093 | spin_unlock_irq(&id_priv->lock); | |
3094 | ||
3095 | if (id->qp) | |
3096 | ib_detach_mcast(id->qp, | |
3097 | &mc->multicast.ib->rec.mgid, | |
3098 | mc->multicast.ib->rec.mlid); | |
3c86aa70 EC |
3099 | if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { |
3100 | switch (rdma_port_get_link_layer(id->device, id->port_num)) { | |
3101 | case IB_LINK_LAYER_INFINIBAND: | |
3102 | ib_sa_free_multicast(mc->multicast.ib); | |
3103 | kfree(mc); | |
3104 | break; | |
3105 | case IB_LINK_LAYER_ETHERNET: | |
3106 | kref_put(&mc->mcref, release_mc); | |
3107 | break; | |
3108 | default: | |
3109 | break; | |
3110 | } | |
3111 | } | |
c8f6a362 SH |
3112 | return; |
3113 | } | |
3114 | } | |
3115 | spin_unlock_irq(&id_priv->lock); | |
3116 | } | |
3117 | EXPORT_SYMBOL(rdma_leave_multicast); | |
3118 | ||
dd5bdff8 OG |
3119 | static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) |
3120 | { | |
3121 | struct rdma_dev_addr *dev_addr; | |
3122 | struct cma_ndev_work *work; | |
3123 | ||
3124 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
3125 | ||
6266ed6e | 3126 | if ((dev_addr->bound_dev_if == ndev->ifindex) && |
dd5bdff8 OG |
3127 | memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { |
3128 | printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", | |
3129 | ndev->name, &id_priv->id); | |
3130 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
3131 | if (!work) | |
3132 | return -ENOMEM; | |
3133 | ||
3134 | INIT_WORK(&work->work, cma_ndev_work_handler); | |
3135 | work->id = id_priv; | |
3136 | work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; | |
3137 | atomic_inc(&id_priv->refcount); | |
3138 | queue_work(cma_wq, &work->work); | |
3139 | } | |
3140 | ||
3141 | return 0; | |
3142 | } | |
3143 | ||
3144 | static int cma_netdev_callback(struct notifier_block *self, unsigned long event, | |
3145 | void *ctx) | |
3146 | { | |
3147 | struct net_device *ndev = (struct net_device *)ctx; | |
3148 | struct cma_device *cma_dev; | |
3149 | struct rdma_id_private *id_priv; | |
3150 | int ret = NOTIFY_DONE; | |
3151 | ||
3152 | if (dev_net(ndev) != &init_net) | |
3153 | return NOTIFY_DONE; | |
3154 | ||
3155 | if (event != NETDEV_BONDING_FAILOVER) | |
3156 | return NOTIFY_DONE; | |
3157 | ||
3158 | if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) | |
3159 | return NOTIFY_DONE; | |
3160 | ||
3161 | mutex_lock(&lock); | |
3162 | list_for_each_entry(cma_dev, &dev_list, list) | |
3163 | list_for_each_entry(id_priv, &cma_dev->id_list, list) { | |
3164 | ret = cma_netdev_change(ndev, id_priv); | |
3165 | if (ret) | |
3166 | goto out; | |
3167 | } | |
3168 | ||
3169 | out: | |
3170 | mutex_unlock(&lock); | |
3171 | return ret; | |
3172 | } | |
3173 | ||
3174 | static struct notifier_block cma_nb = { | |
3175 | .notifier_call = cma_netdev_callback | |
3176 | }; | |
3177 | ||
e51060f0 SH |
3178 | static void cma_add_one(struct ib_device *device) |
3179 | { | |
3180 | struct cma_device *cma_dev; | |
3181 | struct rdma_id_private *id_priv; | |
3182 | ||
3183 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
3184 | if (!cma_dev) | |
3185 | return; | |
3186 | ||
3187 | cma_dev->device = device; | |
e51060f0 SH |
3188 | |
3189 | init_completion(&cma_dev->comp); | |
3190 | atomic_set(&cma_dev->refcount, 1); | |
3191 | INIT_LIST_HEAD(&cma_dev->id_list); | |
3192 | ib_set_client_data(device, &cma_client, cma_dev); | |
3193 | ||
3194 | mutex_lock(&lock); | |
3195 | list_add_tail(&cma_dev->list, &dev_list); | |
3196 | list_for_each_entry(id_priv, &listen_any_list, list) | |
3197 | cma_listen_on_dev(id_priv, cma_dev); | |
3198 | mutex_unlock(&lock); | |
e51060f0 SH |
3199 | } |
3200 | ||
3201 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
3202 | { | |
a1b1b61f | 3203 | struct rdma_cm_event event; |
e51060f0 | 3204 | enum cma_state state; |
de910bd9 | 3205 | int ret = 0; |
e51060f0 SH |
3206 | |
3207 | /* Record that we want to remove the device */ | |
3208 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
3209 | if (state == CMA_DESTROYING) | |
3210 | return 0; | |
3211 | ||
3212 | cma_cancel_operation(id_priv, state); | |
de910bd9 | 3213 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
3214 | |
3215 | /* Check for destruction from another callback. */ | |
3216 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
de910bd9 | 3217 | goto out; |
e51060f0 | 3218 | |
a1b1b61f SH |
3219 | memset(&event, 0, sizeof event); |
3220 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
de910bd9 OG |
3221 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
3222 | out: | |
3223 | mutex_unlock(&id_priv->handler_mutex); | |
3224 | return ret; | |
e51060f0 SH |
3225 | } |
3226 | ||
3227 | static void cma_process_remove(struct cma_device *cma_dev) | |
3228 | { | |
e51060f0 SH |
3229 | struct rdma_id_private *id_priv; |
3230 | int ret; | |
3231 | ||
e51060f0 SH |
3232 | mutex_lock(&lock); |
3233 | while (!list_empty(&cma_dev->id_list)) { | |
3234 | id_priv = list_entry(cma_dev->id_list.next, | |
3235 | struct rdma_id_private, list); | |
3236 | ||
d02d1f53 | 3237 | list_del(&id_priv->listen_list); |
94de178a | 3238 | list_del_init(&id_priv->list); |
e51060f0 SH |
3239 | atomic_inc(&id_priv->refcount); |
3240 | mutex_unlock(&lock); | |
3241 | ||
d02d1f53 | 3242 | ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); |
e51060f0 SH |
3243 | cma_deref_id(id_priv); |
3244 | if (ret) | |
3245 | rdma_destroy_id(&id_priv->id); | |
3246 | ||
3247 | mutex_lock(&lock); | |
3248 | } | |
3249 | mutex_unlock(&lock); | |
3250 | ||
3251 | cma_deref_dev(cma_dev); | |
3252 | wait_for_completion(&cma_dev->comp); | |
3253 | } | |
3254 | ||
3255 | static void cma_remove_one(struct ib_device *device) | |
3256 | { | |
3257 | struct cma_device *cma_dev; | |
3258 | ||
3259 | cma_dev = ib_get_client_data(device, &cma_client); | |
3260 | if (!cma_dev) | |
3261 | return; | |
3262 | ||
3263 | mutex_lock(&lock); | |
3264 | list_del(&cma_dev->list); | |
3265 | mutex_unlock(&lock); | |
3266 | ||
3267 | cma_process_remove(cma_dev); | |
3268 | kfree(cma_dev); | |
3269 | } | |
3270 | ||
716abb1f | 3271 | static int __init cma_init(void) |
e51060f0 | 3272 | { |
5d7220e8 | 3273 | int ret; |
227b60f5 | 3274 | |
c7f743a6 | 3275 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
3276 | if (!cma_wq) |
3277 | return -ENOMEM; | |
3278 | ||
c1a0b23b | 3279 | ib_sa_register_client(&sa_client); |
7a118df3 | 3280 | rdma_addr_register_client(&addr_client); |
dd5bdff8 | 3281 | register_netdevice_notifier(&cma_nb); |
c1a0b23b | 3282 | |
e51060f0 SH |
3283 | ret = ib_register_client(&cma_client); |
3284 | if (ret) | |
3285 | goto err; | |
3286 | return 0; | |
3287 | ||
3288 | err: | |
dd5bdff8 | 3289 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3290 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3291 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3292 | destroy_workqueue(cma_wq); |
3293 | return ret; | |
3294 | } | |
3295 | ||
716abb1f | 3296 | static void __exit cma_cleanup(void) |
e51060f0 SH |
3297 | { |
3298 | ib_unregister_client(&cma_client); | |
dd5bdff8 | 3299 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3300 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3301 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3302 | destroy_workqueue(cma_wq); |
3303 | idr_destroy(&sdp_ps); | |
3304 | idr_destroy(&tcp_ps); | |
628e5f6d | 3305 | idr_destroy(&udp_ps); |
c8f6a362 | 3306 | idr_destroy(&ipoib_ps); |
e51060f0 SH |
3307 | } |
3308 | ||
3309 | module_init(cma_init); | |
3310 | module_exit(cma_cleanup); |