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; |
a9bb7912 | 151 | u8 reuseaddr; |
e51060f0 SH |
152 | }; |
153 | ||
c8f6a362 SH |
154 | struct cma_multicast { |
155 | struct rdma_id_private *id_priv; | |
156 | union { | |
157 | struct ib_sa_multicast *ib; | |
158 | } multicast; | |
159 | struct list_head list; | |
160 | void *context; | |
3f446754 | 161 | struct sockaddr_storage addr; |
3c86aa70 | 162 | struct kref mcref; |
c8f6a362 SH |
163 | }; |
164 | ||
e51060f0 SH |
165 | struct cma_work { |
166 | struct work_struct work; | |
167 | struct rdma_id_private *id; | |
168 | enum cma_state old_state; | |
169 | enum cma_state new_state; | |
170 | struct rdma_cm_event event; | |
171 | }; | |
172 | ||
dd5bdff8 OG |
173 | struct cma_ndev_work { |
174 | struct work_struct work; | |
175 | struct rdma_id_private *id; | |
176 | struct rdma_cm_event event; | |
177 | }; | |
178 | ||
3c86aa70 EC |
179 | struct iboe_mcast_work { |
180 | struct work_struct work; | |
181 | struct rdma_id_private *id; | |
182 | struct cma_multicast *mc; | |
183 | }; | |
184 | ||
e51060f0 SH |
185 | union cma_ip_addr { |
186 | struct in6_addr ip6; | |
187 | struct { | |
1b90c137 AV |
188 | __be32 pad[3]; |
189 | __be32 addr; | |
e51060f0 SH |
190 | } ip4; |
191 | }; | |
192 | ||
193 | struct cma_hdr { | |
194 | u8 cma_version; | |
195 | u8 ip_version; /* IP version: 7:4 */ | |
1b90c137 | 196 | __be16 port; |
e51060f0 SH |
197 | union cma_ip_addr src_addr; |
198 | union cma_ip_addr dst_addr; | |
199 | }; | |
200 | ||
201 | struct sdp_hh { | |
202 | u8 bsdh[16]; | |
203 | u8 sdp_version; /* Major version: 7:4 */ | |
204 | u8 ip_version; /* IP version: 7:4 */ | |
205 | u8 sdp_specific1[10]; | |
1b90c137 AV |
206 | __be16 port; |
207 | __be16 sdp_specific2; | |
e51060f0 SH |
208 | union cma_ip_addr src_addr; |
209 | union cma_ip_addr dst_addr; | |
210 | }; | |
211 | ||
212 | struct sdp_hah { | |
213 | u8 bsdh[16]; | |
214 | u8 sdp_version; | |
215 | }; | |
216 | ||
217 | #define CMA_VERSION 0x00 | |
218 | #define SDP_MAJ_VERSION 0x2 | |
219 | ||
220 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
221 | { | |
222 | unsigned long flags; | |
223 | int ret; | |
224 | ||
225 | spin_lock_irqsave(&id_priv->lock, flags); | |
226 | ret = (id_priv->state == comp); | |
227 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
228 | return ret; | |
229 | } | |
230 | ||
231 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
232 | enum cma_state comp, enum cma_state exch) | |
233 | { | |
234 | unsigned long flags; | |
235 | int ret; | |
236 | ||
237 | spin_lock_irqsave(&id_priv->lock, flags); | |
238 | if ((ret = (id_priv->state == comp))) | |
239 | id_priv->state = exch; | |
240 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
241 | return ret; | |
242 | } | |
243 | ||
244 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
245 | enum cma_state exch) | |
246 | { | |
247 | unsigned long flags; | |
248 | enum cma_state old; | |
249 | ||
250 | spin_lock_irqsave(&id_priv->lock, flags); | |
251 | old = id_priv->state; | |
252 | id_priv->state = exch; | |
253 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
254 | return old; | |
255 | } | |
256 | ||
257 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
258 | { | |
259 | return hdr->ip_version >> 4; | |
260 | } | |
261 | ||
262 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
263 | { | |
264 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
265 | } | |
266 | ||
267 | static inline u8 sdp_get_majv(u8 sdp_version) | |
268 | { | |
269 | return sdp_version >> 4; | |
270 | } | |
271 | ||
272 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
273 | { | |
274 | return hh->ip_version >> 4; | |
275 | } | |
276 | ||
277 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
278 | { | |
279 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
280 | } | |
281 | ||
c8f6a362 SH |
282 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
283 | { | |
284 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); | |
285 | } | |
286 | ||
e51060f0 SH |
287 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
288 | struct cma_device *cma_dev) | |
289 | { | |
290 | atomic_inc(&cma_dev->refcount); | |
291 | id_priv->cma_dev = cma_dev; | |
292 | id_priv->id.device = cma_dev->device; | |
3c86aa70 EC |
293 | id_priv->id.route.addr.dev_addr.transport = |
294 | rdma_node_get_transport(cma_dev->device->node_type); | |
e51060f0 SH |
295 | list_add_tail(&id_priv->list, &cma_dev->id_list); |
296 | } | |
297 | ||
298 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
299 | { | |
300 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
301 | complete(&cma_dev->comp); | |
302 | } | |
303 | ||
3c86aa70 EC |
304 | static inline void release_mc(struct kref *kref) |
305 | { | |
306 | struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); | |
307 | ||
308 | kfree(mc->multicast.ib); | |
309 | kfree(mc); | |
310 | } | |
311 | ||
a396d43a | 312 | static void cma_release_dev(struct rdma_id_private *id_priv) |
e51060f0 | 313 | { |
a396d43a | 314 | mutex_lock(&lock); |
e51060f0 SH |
315 | list_del(&id_priv->list); |
316 | cma_deref_dev(id_priv->cma_dev); | |
317 | id_priv->cma_dev = NULL; | |
a396d43a | 318 | mutex_unlock(&lock); |
e51060f0 SH |
319 | } |
320 | ||
d2ca39f2 | 321 | static int cma_set_qkey(struct rdma_id_private *id_priv) |
c8f6a362 SH |
322 | { |
323 | struct ib_sa_mcmember_rec rec; | |
324 | int ret = 0; | |
325 | ||
d2ca39f2 YE |
326 | if (id_priv->qkey) |
327 | return 0; | |
328 | ||
329 | switch (id_priv->id.ps) { | |
c8f6a362 | 330 | case RDMA_PS_UDP: |
d2ca39f2 | 331 | id_priv->qkey = RDMA_UDP_QKEY; |
c8f6a362 SH |
332 | break; |
333 | case RDMA_PS_IPOIB: | |
d2ca39f2 YE |
334 | ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); |
335 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, | |
336 | id_priv->id.port_num, &rec.mgid, | |
337 | &rec); | |
338 | if (!ret) | |
339 | id_priv->qkey = be32_to_cpu(rec.qkey); | |
c8f6a362 SH |
340 | break; |
341 | default: | |
342 | break; | |
343 | } | |
344 | return ret; | |
345 | } | |
346 | ||
3c86aa70 EC |
347 | static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) |
348 | { | |
349 | int i; | |
350 | int err; | |
351 | struct ib_port_attr props; | |
352 | union ib_gid tmp; | |
353 | ||
354 | err = ib_query_port(device, port_num, &props); | |
355 | if (err) | |
356 | return 1; | |
357 | ||
358 | for (i = 0; i < props.gid_tbl_len; ++i) { | |
359 | err = ib_query_gid(device, port_num, i, &tmp); | |
360 | if (err) | |
361 | return 1; | |
362 | if (!memcmp(&tmp, gid, sizeof tmp)) | |
363 | return 0; | |
364 | } | |
365 | ||
366 | return -EAGAIN; | |
367 | } | |
368 | ||
07ebafba | 369 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 370 | { |
c8f6a362 | 371 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
e51060f0 | 372 | struct cma_device *cma_dev; |
3c86aa70 | 373 | union ib_gid gid, iboe_gid; |
e51060f0 | 374 | int ret = -ENODEV; |
3c86aa70 EC |
375 | u8 port; |
376 | enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? | |
377 | IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; | |
e51060f0 | 378 | |
a396d43a | 379 | mutex_lock(&lock); |
3c86aa70 EC |
380 | iboe_addr_get_sgid(dev_addr, &iboe_gid); |
381 | memcpy(&gid, dev_addr->src_dev_addr + | |
382 | rdma_addr_gid_offset(dev_addr), sizeof gid); | |
e51060f0 | 383 | list_for_each_entry(cma_dev, &dev_list, list) { |
3c86aa70 EC |
384 | for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { |
385 | if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { | |
386 | if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && | |
387 | rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) | |
388 | ret = find_gid_port(cma_dev->device, &iboe_gid, port); | |
389 | else | |
390 | ret = find_gid_port(cma_dev->device, &gid, port); | |
391 | ||
392 | if (!ret) { | |
393 | id_priv->id.port_num = port; | |
394 | goto out; | |
395 | } else if (ret == 1) | |
396 | break; | |
397 | } | |
e51060f0 SH |
398 | } |
399 | } | |
3c86aa70 EC |
400 | |
401 | out: | |
402 | if (!ret) | |
403 | cma_attach_to_dev(id_priv, cma_dev); | |
404 | ||
a396d43a | 405 | mutex_unlock(&lock); |
e51060f0 SH |
406 | return ret; |
407 | } | |
408 | ||
e51060f0 SH |
409 | static void cma_deref_id(struct rdma_id_private *id_priv) |
410 | { | |
411 | if (atomic_dec_and_test(&id_priv->refcount)) | |
412 | complete(&id_priv->comp); | |
413 | } | |
414 | ||
de910bd9 | 415 | static int cma_disable_callback(struct rdma_id_private *id_priv, |
8aa08602 SH |
416 | enum cma_state state) |
417 | { | |
de910bd9 OG |
418 | mutex_lock(&id_priv->handler_mutex); |
419 | if (id_priv->state != state) { | |
420 | mutex_unlock(&id_priv->handler_mutex); | |
421 | return -EINVAL; | |
422 | } | |
423 | return 0; | |
e51060f0 SH |
424 | } |
425 | ||
6c719f5c SH |
426 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
427 | { | |
428 | return (id_priv->id.device && id_priv->cm_id.ib); | |
429 | } | |
430 | ||
e51060f0 SH |
431 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
432 | void *context, enum rdma_port_space ps) | |
433 | { | |
434 | struct rdma_id_private *id_priv; | |
435 | ||
436 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
437 | if (!id_priv) | |
438 | return ERR_PTR(-ENOMEM); | |
439 | ||
440 | id_priv->state = CMA_IDLE; | |
441 | id_priv->id.context = context; | |
442 | id_priv->id.event_handler = event_handler; | |
443 | id_priv->id.ps = ps; | |
444 | spin_lock_init(&id_priv->lock); | |
c5483388 | 445 | mutex_init(&id_priv->qp_mutex); |
e51060f0 SH |
446 | init_completion(&id_priv->comp); |
447 | atomic_set(&id_priv->refcount, 1); | |
de910bd9 | 448 | mutex_init(&id_priv->handler_mutex); |
e51060f0 | 449 | INIT_LIST_HEAD(&id_priv->listen_list); |
c8f6a362 | 450 | INIT_LIST_HEAD(&id_priv->mc_list); |
e51060f0 SH |
451 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
452 | ||
453 | return &id_priv->id; | |
454 | } | |
455 | EXPORT_SYMBOL(rdma_create_id); | |
456 | ||
c8f6a362 | 457 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
e51060f0 SH |
458 | { |
459 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 460 | int qp_attr_mask, ret; |
e51060f0 | 461 | |
c8f6a362 SH |
462 | qp_attr.qp_state = IB_QPS_INIT; |
463 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); | |
e51060f0 SH |
464 | if (ret) |
465 | return ret; | |
466 | ||
c8f6a362 SH |
467 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
468 | if (ret) | |
469 | return ret; | |
470 | ||
471 | qp_attr.qp_state = IB_QPS_RTR; | |
472 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); | |
473 | if (ret) | |
474 | return ret; | |
475 | ||
476 | qp_attr.qp_state = IB_QPS_RTS; | |
477 | qp_attr.sq_psn = 0; | |
478 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
479 | ||
480 | return ret; | |
e51060f0 SH |
481 | } |
482 | ||
c8f6a362 | 483 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
07ebafba TT |
484 | { |
485 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 486 | int qp_attr_mask, ret; |
07ebafba TT |
487 | |
488 | qp_attr.qp_state = IB_QPS_INIT; | |
c8f6a362 SH |
489 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
490 | if (ret) | |
491 | return ret; | |
07ebafba | 492 | |
c8f6a362 | 493 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
07ebafba TT |
494 | } |
495 | ||
e51060f0 SH |
496 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
497 | struct ib_qp_init_attr *qp_init_attr) | |
498 | { | |
499 | struct rdma_id_private *id_priv; | |
500 | struct ib_qp *qp; | |
501 | int ret; | |
502 | ||
503 | id_priv = container_of(id, struct rdma_id_private, id); | |
504 | if (id->device != pd->device) | |
505 | return -EINVAL; | |
506 | ||
507 | qp = ib_create_qp(pd, qp_init_attr); | |
508 | if (IS_ERR(qp)) | |
509 | return PTR_ERR(qp); | |
510 | ||
c8f6a362 SH |
511 | if (cma_is_ud_ps(id_priv->id.ps)) |
512 | ret = cma_init_ud_qp(id_priv, qp); | |
513 | else | |
514 | ret = cma_init_conn_qp(id_priv, qp); | |
e51060f0 SH |
515 | if (ret) |
516 | goto err; | |
517 | ||
518 | id->qp = qp; | |
519 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
520 | id_priv->srq = (qp->srq != NULL); |
521 | return 0; | |
522 | err: | |
523 | ib_destroy_qp(qp); | |
524 | return ret; | |
525 | } | |
526 | EXPORT_SYMBOL(rdma_create_qp); | |
527 | ||
528 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
529 | { | |
c5483388 SH |
530 | struct rdma_id_private *id_priv; |
531 | ||
532 | id_priv = container_of(id, struct rdma_id_private, id); | |
533 | mutex_lock(&id_priv->qp_mutex); | |
534 | ib_destroy_qp(id_priv->id.qp); | |
535 | id_priv->id.qp = NULL; | |
536 | mutex_unlock(&id_priv->qp_mutex); | |
e51060f0 SH |
537 | } |
538 | EXPORT_SYMBOL(rdma_destroy_qp); | |
539 | ||
5851bb89 SH |
540 | static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, |
541 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
542 | { |
543 | struct ib_qp_attr qp_attr; | |
544 | int qp_attr_mask, ret; | |
545 | ||
c5483388 SH |
546 | mutex_lock(&id_priv->qp_mutex); |
547 | if (!id_priv->id.qp) { | |
548 | ret = 0; | |
549 | goto out; | |
550 | } | |
e51060f0 SH |
551 | |
552 | /* Need to update QP attributes from default values. */ | |
553 | qp_attr.qp_state = IB_QPS_INIT; | |
c5483388 | 554 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 555 | if (ret) |
c5483388 | 556 | goto out; |
e51060f0 | 557 | |
c5483388 | 558 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
e51060f0 | 559 | if (ret) |
c5483388 | 560 | goto out; |
e51060f0 SH |
561 | |
562 | qp_attr.qp_state = IB_QPS_RTR; | |
c5483388 | 563 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 564 | if (ret) |
c5483388 | 565 | goto out; |
e51060f0 | 566 | |
5851bb89 SH |
567 | if (conn_param) |
568 | qp_attr.max_dest_rd_atomic = conn_param->responder_resources; | |
c5483388 SH |
569 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
570 | out: | |
571 | mutex_unlock(&id_priv->qp_mutex); | |
572 | return ret; | |
e51060f0 SH |
573 | } |
574 | ||
5851bb89 SH |
575 | static int cma_modify_qp_rts(struct rdma_id_private *id_priv, |
576 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
577 | { |
578 | struct ib_qp_attr qp_attr; | |
579 | int qp_attr_mask, ret; | |
580 | ||
c5483388 SH |
581 | mutex_lock(&id_priv->qp_mutex); |
582 | if (!id_priv->id.qp) { | |
583 | ret = 0; | |
584 | goto out; | |
585 | } | |
e51060f0 SH |
586 | |
587 | qp_attr.qp_state = IB_QPS_RTS; | |
c5483388 | 588 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 589 | if (ret) |
c5483388 | 590 | goto out; |
e51060f0 | 591 | |
5851bb89 SH |
592 | if (conn_param) |
593 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
c5483388 SH |
594 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
595 | out: | |
596 | mutex_unlock(&id_priv->qp_mutex); | |
597 | return ret; | |
e51060f0 SH |
598 | } |
599 | ||
c5483388 | 600 | static int cma_modify_qp_err(struct rdma_id_private *id_priv) |
e51060f0 SH |
601 | { |
602 | struct ib_qp_attr qp_attr; | |
c5483388 | 603 | int ret; |
e51060f0 | 604 | |
c5483388 SH |
605 | mutex_lock(&id_priv->qp_mutex); |
606 | if (!id_priv->id.qp) { | |
607 | ret = 0; | |
608 | goto out; | |
609 | } | |
e51060f0 SH |
610 | |
611 | qp_attr.qp_state = IB_QPS_ERR; | |
c5483388 SH |
612 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); |
613 | out: | |
614 | mutex_unlock(&id_priv->qp_mutex); | |
615 | return ret; | |
e51060f0 SH |
616 | } |
617 | ||
c8f6a362 SH |
618 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
619 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) | |
620 | { | |
621 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
622 | int ret; | |
3c86aa70 EC |
623 | u16 pkey; |
624 | ||
625 | if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == | |
626 | IB_LINK_LAYER_INFINIBAND) | |
627 | pkey = ib_addr_get_pkey(dev_addr); | |
628 | else | |
629 | pkey = 0xffff; | |
c8f6a362 SH |
630 | |
631 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
3c86aa70 | 632 | pkey, &qp_attr->pkey_index); |
c8f6a362 SH |
633 | if (ret) |
634 | return ret; | |
635 | ||
636 | qp_attr->port_num = id_priv->id.port_num; | |
637 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
638 | ||
639 | if (cma_is_ud_ps(id_priv->id.ps)) { | |
d2ca39f2 YE |
640 | ret = cma_set_qkey(id_priv); |
641 | if (ret) | |
642 | return ret; | |
643 | ||
c8f6a362 SH |
644 | qp_attr->qkey = id_priv->qkey; |
645 | *qp_attr_mask |= IB_QP_QKEY; | |
646 | } else { | |
647 | qp_attr->qp_access_flags = 0; | |
648 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; | |
649 | } | |
650 | return 0; | |
651 | } | |
652 | ||
e51060f0 SH |
653 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
654 | int *qp_attr_mask) | |
655 | { | |
656 | struct rdma_id_private *id_priv; | |
c8f6a362 | 657 | int ret = 0; |
e51060f0 SH |
658 | |
659 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
660 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
661 | case RDMA_TRANSPORT_IB: | |
c8f6a362 SH |
662 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
663 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); | |
664 | else | |
665 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
666 | qp_attr_mask); | |
e51060f0 SH |
667 | if (qp_attr->qp_state == IB_QPS_RTR) |
668 | qp_attr->rq_psn = id_priv->seq_num; | |
669 | break; | |
07ebafba | 670 | case RDMA_TRANSPORT_IWARP: |
c8f6a362 | 671 | if (!id_priv->cm_id.iw) { |
8f076531 | 672 | qp_attr->qp_access_flags = 0; |
c8f6a362 SH |
673 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
674 | } else | |
675 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
676 | qp_attr_mask); | |
07ebafba | 677 | break; |
e51060f0 SH |
678 | default: |
679 | ret = -ENOSYS; | |
680 | break; | |
681 | } | |
682 | ||
683 | return ret; | |
684 | } | |
685 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
686 | ||
687 | static inline int cma_zero_addr(struct sockaddr *addr) | |
688 | { | |
689 | struct in6_addr *ip6; | |
690 | ||
691 | if (addr->sa_family == AF_INET) | |
6360a02a JP |
692 | return ipv4_is_zeronet( |
693 | ((struct sockaddr_in *)addr)->sin_addr.s_addr); | |
e51060f0 SH |
694 | else { |
695 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
696 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 697 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
698 | } |
699 | } | |
700 | ||
701 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
702 | { | |
1f5175ad AS |
703 | if (addr->sa_family == AF_INET) |
704 | return ipv4_is_loopback( | |
705 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
706 | else | |
707 | return ipv6_addr_loopback( | |
708 | &((struct sockaddr_in6 *) addr)->sin6_addr); | |
e51060f0 SH |
709 | } |
710 | ||
711 | static inline int cma_any_addr(struct sockaddr *addr) | |
712 | { | |
713 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
714 | } | |
715 | ||
43b752da HS |
716 | static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) |
717 | { | |
718 | if (src->sa_family != dst->sa_family) | |
719 | return -1; | |
720 | ||
721 | switch (src->sa_family) { | |
722 | case AF_INET: | |
723 | return ((struct sockaddr_in *) src)->sin_addr.s_addr != | |
724 | ((struct sockaddr_in *) dst)->sin_addr.s_addr; | |
725 | default: | |
726 | return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, | |
727 | &((struct sockaddr_in6 *) dst)->sin6_addr); | |
728 | } | |
729 | } | |
730 | ||
628e5f6d SH |
731 | static inline __be16 cma_port(struct sockaddr *addr) |
732 | { | |
733 | if (addr->sa_family == AF_INET) | |
734 | return ((struct sockaddr_in *) addr)->sin_port; | |
735 | else | |
736 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
737 | } | |
738 | ||
e51060f0 SH |
739 | static inline int cma_any_port(struct sockaddr *addr) |
740 | { | |
628e5f6d | 741 | return !cma_port(addr); |
e51060f0 SH |
742 | } |
743 | ||
744 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
1b90c137 | 745 | u8 *ip_ver, __be16 *port, |
e51060f0 SH |
746 | union cma_ip_addr **src, union cma_ip_addr **dst) |
747 | { | |
748 | switch (ps) { | |
749 | case RDMA_PS_SDP: | |
750 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
751 | SDP_MAJ_VERSION) | |
752 | return -EINVAL; | |
753 | ||
754 | *ip_ver = sdp_get_ip_ver(hdr); | |
755 | *port = ((struct sdp_hh *) hdr)->port; | |
756 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
757 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
758 | break; | |
759 | default: | |
760 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
761 | return -EINVAL; | |
762 | ||
763 | *ip_ver = cma_get_ip_ver(hdr); | |
764 | *port = ((struct cma_hdr *) hdr)->port; | |
765 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
766 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
767 | break; | |
768 | } | |
769 | ||
770 | if (*ip_ver != 4 && *ip_ver != 6) | |
771 | return -EINVAL; | |
772 | return 0; | |
773 | } | |
774 | ||
775 | static void cma_save_net_info(struct rdma_addr *addr, | |
776 | struct rdma_addr *listen_addr, | |
1b90c137 | 777 | u8 ip_ver, __be16 port, |
e51060f0 SH |
778 | union cma_ip_addr *src, union cma_ip_addr *dst) |
779 | { | |
780 | struct sockaddr_in *listen4, *ip4; | |
781 | struct sockaddr_in6 *listen6, *ip6; | |
782 | ||
783 | switch (ip_ver) { | |
784 | case 4: | |
785 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
786 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
787 | ip4->sin_family = listen4->sin_family; | |
788 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
789 | ip4->sin_port = listen4->sin_port; | |
790 | ||
791 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
792 | ip4->sin_family = listen4->sin_family; | |
793 | ip4->sin_addr.s_addr = src->ip4.addr; | |
794 | ip4->sin_port = port; | |
795 | break; | |
796 | case 6: | |
797 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
798 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
799 | ip6->sin6_family = listen6->sin6_family; | |
800 | ip6->sin6_addr = dst->ip6; | |
801 | ip6->sin6_port = listen6->sin6_port; | |
802 | ||
803 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
804 | ip6->sin6_family = listen6->sin6_family; | |
805 | ip6->sin6_addr = src->ip6; | |
806 | ip6->sin6_port = port; | |
807 | break; | |
808 | default: | |
809 | break; | |
810 | } | |
811 | } | |
812 | ||
813 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
814 | { | |
815 | switch (ps) { | |
816 | case RDMA_PS_SDP: | |
817 | return 0; | |
818 | default: | |
819 | return sizeof(struct cma_hdr); | |
820 | } | |
821 | } | |
822 | ||
e51060f0 SH |
823 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
824 | { | |
3c86aa70 EC |
825 | switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { |
826 | case IB_LINK_LAYER_INFINIBAND: | |
e51060f0 SH |
827 | if (id_priv->query) |
828 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
829 | break; | |
830 | default: | |
831 | break; | |
832 | } | |
833 | } | |
834 | ||
e51060f0 SH |
835 | static void cma_cancel_listens(struct rdma_id_private *id_priv) |
836 | { | |
837 | struct rdma_id_private *dev_id_priv; | |
838 | ||
d02d1f53 SH |
839 | /* |
840 | * Remove from listen_any_list to prevent added devices from spawning | |
841 | * additional listen requests. | |
842 | */ | |
e51060f0 SH |
843 | mutex_lock(&lock); |
844 | list_del(&id_priv->list); | |
845 | ||
846 | while (!list_empty(&id_priv->listen_list)) { | |
847 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
848 | struct rdma_id_private, listen_list); | |
d02d1f53 SH |
849 | /* sync with device removal to avoid duplicate destruction */ |
850 | list_del_init(&dev_id_priv->list); | |
851 | list_del(&dev_id_priv->listen_list); | |
852 | mutex_unlock(&lock); | |
853 | ||
854 | rdma_destroy_id(&dev_id_priv->id); | |
855 | mutex_lock(&lock); | |
e51060f0 SH |
856 | } |
857 | mutex_unlock(&lock); | |
858 | } | |
859 | ||
860 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
861 | enum cma_state state) | |
862 | { | |
863 | switch (state) { | |
864 | case CMA_ADDR_QUERY: | |
865 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
866 | break; | |
867 | case CMA_ROUTE_QUERY: | |
868 | cma_cancel_route(id_priv); | |
869 | break; | |
870 | case CMA_LISTEN: | |
3f446754 RD |
871 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) |
872 | && !id_priv->cma_dev) | |
e51060f0 SH |
873 | cma_cancel_listens(id_priv); |
874 | break; | |
875 | default: | |
876 | break; | |
877 | } | |
878 | } | |
879 | ||
880 | static void cma_release_port(struct rdma_id_private *id_priv) | |
881 | { | |
882 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
883 | ||
884 | if (!bind_list) | |
885 | return; | |
886 | ||
887 | mutex_lock(&lock); | |
888 | hlist_del(&id_priv->node); | |
889 | if (hlist_empty(&bind_list->owners)) { | |
890 | idr_remove(bind_list->ps, bind_list->port); | |
891 | kfree(bind_list); | |
892 | } | |
893 | mutex_unlock(&lock); | |
894 | } | |
895 | ||
c8f6a362 SH |
896 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
897 | { | |
898 | struct cma_multicast *mc; | |
899 | ||
900 | while (!list_empty(&id_priv->mc_list)) { | |
901 | mc = container_of(id_priv->mc_list.next, | |
902 | struct cma_multicast, list); | |
903 | list_del(&mc->list); | |
3c86aa70 EC |
904 | switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { |
905 | case IB_LINK_LAYER_INFINIBAND: | |
906 | ib_sa_free_multicast(mc->multicast.ib); | |
907 | kfree(mc); | |
908 | break; | |
909 | case IB_LINK_LAYER_ETHERNET: | |
910 | kref_put(&mc->mcref, release_mc); | |
911 | break; | |
912 | default: | |
913 | break; | |
914 | } | |
c8f6a362 SH |
915 | } |
916 | } | |
917 | ||
e51060f0 SH |
918 | void rdma_destroy_id(struct rdma_cm_id *id) |
919 | { | |
920 | struct rdma_id_private *id_priv; | |
921 | enum cma_state state; | |
922 | ||
923 | id_priv = container_of(id, struct rdma_id_private, id); | |
924 | state = cma_exch(id_priv, CMA_DESTROYING); | |
925 | cma_cancel_operation(id_priv, state); | |
926 | ||
a396d43a SH |
927 | /* |
928 | * Wait for any active callback to finish. New callbacks will find | |
929 | * the id_priv state set to destroying and abort. | |
930 | */ | |
931 | mutex_lock(&id_priv->handler_mutex); | |
932 | mutex_unlock(&id_priv->handler_mutex); | |
933 | ||
e51060f0 | 934 | if (id_priv->cma_dev) { |
3c86aa70 | 935 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
07ebafba | 936 | case RDMA_TRANSPORT_IB: |
3cd96564 | 937 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
938 | ib_destroy_cm_id(id_priv->cm_id.ib); |
939 | break; | |
07ebafba TT |
940 | case RDMA_TRANSPORT_IWARP: |
941 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
942 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
943 | break; | |
e51060f0 SH |
944 | default: |
945 | break; | |
946 | } | |
c8f6a362 | 947 | cma_leave_mc_groups(id_priv); |
a396d43a | 948 | cma_release_dev(id_priv); |
e51060f0 SH |
949 | } |
950 | ||
951 | cma_release_port(id_priv); | |
952 | cma_deref_id(id_priv); | |
953 | wait_for_completion(&id_priv->comp); | |
954 | ||
d02d1f53 SH |
955 | if (id_priv->internal_id) |
956 | cma_deref_id(id_priv->id.context); | |
957 | ||
e51060f0 SH |
958 | kfree(id_priv->id.route.path_rec); |
959 | kfree(id_priv); | |
960 | } | |
961 | EXPORT_SYMBOL(rdma_destroy_id); | |
962 | ||
963 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
964 | { | |
965 | int ret; | |
966 | ||
5851bb89 | 967 | ret = cma_modify_qp_rtr(id_priv, NULL); |
e51060f0 SH |
968 | if (ret) |
969 | goto reject; | |
970 | ||
5851bb89 | 971 | ret = cma_modify_qp_rts(id_priv, NULL); |
e51060f0 SH |
972 | if (ret) |
973 | goto reject; | |
974 | ||
975 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
976 | if (ret) | |
977 | goto reject; | |
978 | ||
979 | return 0; | |
980 | reject: | |
c5483388 | 981 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
982 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
983 | NULL, 0, NULL, 0); | |
984 | return ret; | |
985 | } | |
986 | ||
987 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
988 | { | |
989 | if (id_priv->id.ps == RDMA_PS_SDP && | |
990 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
991 | SDP_MAJ_VERSION) | |
992 | return -EINVAL; | |
993 | ||
994 | return 0; | |
995 | } | |
996 | ||
a1b1b61f SH |
997 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
998 | struct ib_cm_rep_event_param *rep_data, | |
999 | void *private_data) | |
1000 | { | |
1001 | event->param.conn.private_data = private_data; | |
1002 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
1003 | event->param.conn.responder_resources = rep_data->responder_resources; | |
1004 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
1005 | event->param.conn.flow_control = rep_data->flow_control; | |
1006 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
1007 | event->param.conn.srq = rep_data->srq; | |
1008 | event->param.conn.qp_num = rep_data->remote_qpn; | |
1009 | } | |
1010 | ||
e51060f0 SH |
1011 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1012 | { | |
1013 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
1014 | struct rdma_cm_event event; |
1015 | int ret = 0; | |
e51060f0 | 1016 | |
38ca83a5 AV |
1017 | if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && |
1018 | cma_disable_callback(id_priv, CMA_CONNECT)) || | |
1019 | (ib_event->event == IB_CM_TIMEWAIT_EXIT && | |
1020 | cma_disable_callback(id_priv, CMA_DISCONNECT))) | |
8aa08602 | 1021 | return 0; |
e51060f0 | 1022 | |
a1b1b61f | 1023 | memset(&event, 0, sizeof event); |
e51060f0 SH |
1024 | switch (ib_event->event) { |
1025 | case IB_CM_REQ_ERROR: | |
1026 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
1027 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
1028 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
1029 | break; |
1030 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
1031 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
1032 | if (event.status) | |
1033 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 1034 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
1035 | event.status = cma_rep_recv(id_priv); |
1036 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
1037 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 1038 | } else |
a1b1b61f SH |
1039 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
1040 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
1041 | ib_event->private_data); | |
e51060f0 SH |
1042 | break; |
1043 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
1044 | case IB_CM_USER_ESTABLISHED: |
1045 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
1046 | break; |
1047 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 1048 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
1049 | case IB_CM_DREQ_RECEIVED: |
1050 | case IB_CM_DREP_RECEIVED: | |
1051 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
1052 | goto out; | |
a1b1b61f | 1053 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
1054 | break; |
1055 | case IB_CM_TIMEWAIT_EXIT: | |
38ca83a5 AV |
1056 | event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; |
1057 | break; | |
e51060f0 SH |
1058 | case IB_CM_MRA_RECEIVED: |
1059 | /* ignore event */ | |
1060 | goto out; | |
1061 | case IB_CM_REJ_RECEIVED: | |
c5483388 | 1062 | cma_modify_qp_err(id_priv); |
a1b1b61f SH |
1063 | event.status = ib_event->param.rej_rcvd.reason; |
1064 | event.event = RDMA_CM_EVENT_REJECTED; | |
1065 | event.param.conn.private_data = ib_event->private_data; | |
1066 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
1067 | break; |
1068 | default: | |
468f2239 | 1069 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
e51060f0 SH |
1070 | ib_event->event); |
1071 | goto out; | |
1072 | } | |
1073 | ||
a1b1b61f | 1074 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
1075 | if (ret) { |
1076 | /* Destroy the CM ID by returning a non-zero value. */ | |
1077 | id_priv->cm_id.ib = NULL; | |
1078 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1079 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1080 | rdma_destroy_id(&id_priv->id); |
1081 | return ret; | |
1082 | } | |
1083 | out: | |
de910bd9 | 1084 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1085 | return ret; |
1086 | } | |
1087 | ||
628e5f6d SH |
1088 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
1089 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
1090 | { |
1091 | struct rdma_id_private *id_priv; | |
1092 | struct rdma_cm_id *id; | |
1093 | struct rdma_route *rt; | |
1094 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1095 | __be16 port; |
e51060f0 | 1096 | u8 ip_ver; |
64c5e613 | 1097 | int ret; |
e51060f0 | 1098 | |
3f168d2b KK |
1099 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
1100 | &ip_ver, &port, &src, &dst)) | |
1101 | goto err; | |
1102 | ||
e51060f0 SH |
1103 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
1104 | listen_id->ps); | |
1105 | if (IS_ERR(id)) | |
3f168d2b KK |
1106 | goto err; |
1107 | ||
1108 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1109 | ip_ver, port, src, dst); | |
e51060f0 SH |
1110 | |
1111 | rt = &id->route; | |
1112 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
1113 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
1114 | GFP_KERNEL); | |
e51060f0 | 1115 | if (!rt->path_rec) |
3f168d2b | 1116 | goto destroy_id; |
e51060f0 | 1117 | |
e51060f0 SH |
1118 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
1119 | if (rt->num_paths == 2) | |
1120 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
1121 | ||
6f8372b6 SH |
1122 | if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { |
1123 | rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; | |
1124 | rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
1125 | ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); | |
1126 | } else { | |
1127 | ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, | |
1128 | &rt->addr.dev_addr); | |
1129 | if (ret) | |
1130 | goto destroy_id; | |
1131 | } | |
1132 | rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
e51060f0 SH |
1133 | |
1134 | id_priv = container_of(id, struct rdma_id_private, id); | |
1135 | id_priv->state = CMA_CONNECT; | |
1136 | return id_priv; | |
3f168d2b KK |
1137 | |
1138 | destroy_id: | |
e51060f0 | 1139 | rdma_destroy_id(id); |
3f168d2b | 1140 | err: |
e51060f0 SH |
1141 | return NULL; |
1142 | } | |
1143 | ||
628e5f6d SH |
1144 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
1145 | struct ib_cm_event *ib_event) | |
1146 | { | |
1147 | struct rdma_id_private *id_priv; | |
1148 | struct rdma_cm_id *id; | |
1149 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1150 | __be16 port; |
628e5f6d SH |
1151 | u8 ip_ver; |
1152 | int ret; | |
1153 | ||
1154 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
1155 | listen_id->ps); | |
1156 | if (IS_ERR(id)) | |
1157 | return NULL; | |
1158 | ||
1159 | ||
1160 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
1161 | &ip_ver, &port, &src, &dst)) | |
1162 | goto err; | |
1163 | ||
1164 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1165 | ip_ver, port, src, dst); | |
1166 | ||
6f8372b6 SH |
1167 | if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { |
1168 | ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, | |
1169 | &id->route.addr.dev_addr); | |
1170 | if (ret) | |
1171 | goto err; | |
1172 | } | |
628e5f6d SH |
1173 | |
1174 | id_priv = container_of(id, struct rdma_id_private, id); | |
1175 | id_priv->state = CMA_CONNECT; | |
1176 | return id_priv; | |
1177 | err: | |
1178 | rdma_destroy_id(id); | |
1179 | return NULL; | |
1180 | } | |
1181 | ||
a1b1b61f SH |
1182 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
1183 | struct ib_cm_req_event_param *req_data, | |
1184 | void *private_data, int offset) | |
1185 | { | |
1186 | event->param.conn.private_data = private_data + offset; | |
1187 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
1188 | event->param.conn.responder_resources = req_data->responder_resources; | |
1189 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
1190 | event->param.conn.flow_control = req_data->flow_control; | |
1191 | event->param.conn.retry_count = req_data->retry_count; | |
1192 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
1193 | event->param.conn.srq = req_data->srq; | |
1194 | event->param.conn.qp_num = req_data->remote_qpn; | |
1195 | } | |
1196 | ||
e51060f0 SH |
1197 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1198 | { | |
1199 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 1200 | struct rdma_cm_event event; |
e51060f0 SH |
1201 | int offset, ret; |
1202 | ||
1203 | listen_id = cm_id->context; | |
de910bd9 | 1204 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1205 | return -ECONNABORTED; |
e51060f0 | 1206 | |
628e5f6d SH |
1207 | memset(&event, 0, sizeof event); |
1208 | offset = cma_user_data_offset(listen_id->id.ps); | |
1209 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
c8f6a362 | 1210 | if (cma_is_ud_ps(listen_id->id.ps)) { |
628e5f6d SH |
1211 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
1212 | event.param.ud.private_data = ib_event->private_data + offset; | |
1213 | event.param.ud.private_data_len = | |
1214 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
1215 | } else { | |
1216 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); | |
1217 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
1218 | ib_event->private_data, offset); | |
1219 | } | |
e51060f0 SH |
1220 | if (!conn_id) { |
1221 | ret = -ENOMEM; | |
1222 | goto out; | |
1223 | } | |
1224 | ||
de910bd9 | 1225 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
07ebafba | 1226 | ret = cma_acquire_dev(conn_id); |
a1a733f6 KK |
1227 | if (ret) |
1228 | goto release_conn_id; | |
e51060f0 SH |
1229 | |
1230 | conn_id->cm_id.ib = cm_id; | |
1231 | cm_id->context = conn_id; | |
1232 | cm_id->cm_handler = cma_ib_handler; | |
1233 | ||
25ae21a1 SH |
1234 | /* |
1235 | * Protect against the user destroying conn_id from another thread | |
1236 | * until we're done accessing it. | |
1237 | */ | |
1238 | atomic_inc(&conn_id->refcount); | |
a1b1b61f | 1239 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
45d9478d | 1240 | if (!ret) { |
ead595ae SH |
1241 | /* |
1242 | * Acquire mutex to prevent user executing rdma_destroy_id() | |
1243 | * while we're accessing the cm_id. | |
1244 | */ | |
1245 | mutex_lock(&lock); | |
1246 | if (cma_comp(conn_id, CMA_CONNECT) && | |
1247 | !cma_is_ud_ps(conn_id->id.ps)) | |
1248 | ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); | |
1249 | mutex_unlock(&lock); | |
de910bd9 | 1250 | mutex_unlock(&conn_id->handler_mutex); |
25ae21a1 | 1251 | cma_deref_id(conn_id); |
a1a733f6 | 1252 | goto out; |
45d9478d | 1253 | } |
25ae21a1 | 1254 | cma_deref_id(conn_id); |
a1a733f6 KK |
1255 | |
1256 | /* Destroy the CM ID by returning a non-zero value. */ | |
1257 | conn_id->cm_id.ib = NULL; | |
1258 | ||
1259 | release_conn_id: | |
1260 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1261 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 KK |
1262 | rdma_destroy_id(&conn_id->id); |
1263 | ||
e51060f0 | 1264 | out: |
de910bd9 | 1265 | mutex_unlock(&listen_id->handler_mutex); |
e51060f0 SH |
1266 | return ret; |
1267 | } | |
1268 | ||
1269 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1270 | { | |
628e5f6d | 1271 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1272 | } |
1273 | ||
1274 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1275 | struct ib_cm_compare_data *compare) | |
1276 | { | |
1277 | struct cma_hdr *cma_data, *cma_mask; | |
1278 | struct sdp_hh *sdp_data, *sdp_mask; | |
1b90c137 | 1279 | __be32 ip4_addr; |
e51060f0 SH |
1280 | struct in6_addr ip6_addr; |
1281 | ||
1282 | memset(compare, 0, sizeof *compare); | |
1283 | cma_data = (void *) compare->data; | |
1284 | cma_mask = (void *) compare->mask; | |
1285 | sdp_data = (void *) compare->data; | |
1286 | sdp_mask = (void *) compare->mask; | |
1287 | ||
1288 | switch (addr->sa_family) { | |
1289 | case AF_INET: | |
1290 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1291 | if (ps == RDMA_PS_SDP) { | |
1292 | sdp_set_ip_ver(sdp_data, 4); | |
1293 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1294 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1295 | sdp_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1296 | } else { |
1297 | cma_set_ip_ver(cma_data, 4); | |
1298 | cma_set_ip_ver(cma_mask, 0xF); | |
1299 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1300 | cma_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1301 | } |
1302 | break; | |
1303 | case AF_INET6: | |
1304 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1305 | if (ps == RDMA_PS_SDP) { | |
1306 | sdp_set_ip_ver(sdp_data, 6); | |
1307 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1308 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1309 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1310 | sizeof sdp_mask->dst_addr.ip6); | |
1311 | } else { | |
1312 | cma_set_ip_ver(cma_data, 6); | |
1313 | cma_set_ip_ver(cma_mask, 0xF); | |
1314 | cma_data->dst_addr.ip6 = ip6_addr; | |
1315 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1316 | sizeof cma_mask->dst_addr.ip6); | |
1317 | } | |
1318 | break; | |
1319 | default: | |
1320 | break; | |
1321 | } | |
1322 | } | |
1323 | ||
07ebafba TT |
1324 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1325 | { | |
1326 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1327 | struct rdma_cm_event event; |
07ebafba TT |
1328 | struct sockaddr_in *sin; |
1329 | int ret = 0; | |
1330 | ||
de910bd9 | 1331 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
be65f086 | 1332 | return 0; |
07ebafba | 1333 | |
be65f086 | 1334 | memset(&event, 0, sizeof event); |
07ebafba TT |
1335 | switch (iw_event->event) { |
1336 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1337 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1338 | break; |
1339 | case IW_CM_EVENT_CONNECT_REPLY: | |
1340 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1341 | *sin = iw_event->local_addr; | |
1342 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1343 | *sin = iw_event->remote_addr; | |
881a045f SW |
1344 | switch (iw_event->status) { |
1345 | case 0: | |
a1b1b61f | 1346 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1347 | break; |
1348 | case -ECONNRESET: | |
1349 | case -ECONNREFUSED: | |
1350 | event.event = RDMA_CM_EVENT_REJECTED; | |
1351 | break; | |
1352 | case -ETIMEDOUT: | |
1353 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1354 | break; | |
1355 | default: | |
1356 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1357 | break; | |
1358 | } | |
07ebafba TT |
1359 | break; |
1360 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1361 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1362 | break; |
1363 | default: | |
1364 | BUG_ON(1); | |
1365 | } | |
1366 | ||
a1b1b61f SH |
1367 | event.status = iw_event->status; |
1368 | event.param.conn.private_data = iw_event->private_data; | |
1369 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1370 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1371 | if (ret) { |
1372 | /* Destroy the CM ID by returning a non-zero value. */ | |
1373 | id_priv->cm_id.iw = NULL; | |
1374 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1375 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1376 | rdma_destroy_id(&id_priv->id); |
1377 | return ret; | |
1378 | } | |
1379 | ||
de910bd9 | 1380 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1381 | return ret; |
1382 | } | |
1383 | ||
1384 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1385 | struct iw_cm_event *iw_event) | |
1386 | { | |
1387 | struct rdma_cm_id *new_cm_id; | |
1388 | struct rdma_id_private *listen_id, *conn_id; | |
1389 | struct sockaddr_in *sin; | |
1390 | struct net_device *dev = NULL; | |
a1b1b61f | 1391 | struct rdma_cm_event event; |
07ebafba | 1392 | int ret; |
8d8293cf | 1393 | struct ib_device_attr attr; |
07ebafba TT |
1394 | |
1395 | listen_id = cm_id->context; | |
de910bd9 | 1396 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1397 | return -ECONNABORTED; |
07ebafba TT |
1398 | |
1399 | /* Create a new RDMA id for the new IW CM ID */ | |
1400 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1401 | listen_id->id.context, | |
1402 | RDMA_PS_TCP); | |
10f32065 | 1403 | if (IS_ERR(new_cm_id)) { |
07ebafba TT |
1404 | ret = -ENOMEM; |
1405 | goto out; | |
1406 | } | |
1407 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
de910bd9 | 1408 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
07ebafba TT |
1409 | conn_id->state = CMA_CONNECT; |
1410 | ||
1ab35276 | 1411 | dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); |
07ebafba TT |
1412 | if (!dev) { |
1413 | ret = -EADDRNOTAVAIL; | |
de910bd9 | 1414 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1415 | rdma_destroy_id(new_cm_id); |
1416 | goto out; | |
1417 | } | |
1418 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1419 | if (ret) { | |
de910bd9 | 1420 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1421 | rdma_destroy_id(new_cm_id); |
1422 | goto out; | |
1423 | } | |
1424 | ||
1425 | ret = cma_acquire_dev(conn_id); | |
1426 | if (ret) { | |
de910bd9 | 1427 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1428 | rdma_destroy_id(new_cm_id); |
1429 | goto out; | |
1430 | } | |
1431 | ||
1432 | conn_id->cm_id.iw = cm_id; | |
1433 | cm_id->context = conn_id; | |
1434 | cm_id->cm_handler = cma_iw_handler; | |
1435 | ||
1436 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1437 | *sin = iw_event->local_addr; | |
1438 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1439 | *sin = iw_event->remote_addr; | |
1440 | ||
8d8293cf SW |
1441 | ret = ib_query_device(conn_id->id.device, &attr); |
1442 | if (ret) { | |
de910bd9 | 1443 | mutex_unlock(&conn_id->handler_mutex); |
8d8293cf SW |
1444 | rdma_destroy_id(new_cm_id); |
1445 | goto out; | |
1446 | } | |
1447 | ||
a1b1b61f SH |
1448 | memset(&event, 0, sizeof event); |
1449 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1450 | event.param.conn.private_data = iw_event->private_data; | |
1451 | event.param.conn.private_data_len = iw_event->private_data_len; | |
8d8293cf SW |
1452 | event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; |
1453 | event.param.conn.responder_resources = attr.max_qp_rd_atom; | |
25ae21a1 SH |
1454 | |
1455 | /* | |
1456 | * Protect against the user destroying conn_id from another thread | |
1457 | * until we're done accessing it. | |
1458 | */ | |
1459 | atomic_inc(&conn_id->refcount); | |
a1b1b61f | 1460 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
07ebafba TT |
1461 | if (ret) { |
1462 | /* User wants to destroy the CM ID */ | |
1463 | conn_id->cm_id.iw = NULL; | |
1464 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1465 | mutex_unlock(&conn_id->handler_mutex); |
25ae21a1 | 1466 | cma_deref_id(conn_id); |
07ebafba | 1467 | rdma_destroy_id(&conn_id->id); |
de910bd9 | 1468 | goto out; |
07ebafba TT |
1469 | } |
1470 | ||
de910bd9 | 1471 | mutex_unlock(&conn_id->handler_mutex); |
25ae21a1 | 1472 | cma_deref_id(conn_id); |
de910bd9 | 1473 | |
07ebafba TT |
1474 | out: |
1475 | if (dev) | |
1476 | dev_put(dev); | |
de910bd9 | 1477 | mutex_unlock(&listen_id->handler_mutex); |
07ebafba TT |
1478 | return ret; |
1479 | } | |
1480 | ||
e51060f0 SH |
1481 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1482 | { | |
1483 | struct ib_cm_compare_data compare_data; | |
1484 | struct sockaddr *addr; | |
1485 | __be64 svc_id; | |
1486 | int ret; | |
1487 | ||
1488 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1489 | id_priv); | |
1490 | if (IS_ERR(id_priv->cm_id.ib)) | |
1491 | return PTR_ERR(id_priv->cm_id.ib); | |
1492 | ||
3f446754 | 1493 | addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
e51060f0 SH |
1494 | svc_id = cma_get_service_id(id_priv->id.ps, addr); |
1495 | if (cma_any_addr(addr)) | |
1496 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1497 | else { | |
1498 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1499 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1500 | } | |
1501 | ||
1502 | if (ret) { | |
1503 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1504 | id_priv->cm_id.ib = NULL; | |
1505 | } | |
1506 | ||
1507 | return ret; | |
1508 | } | |
1509 | ||
07ebafba TT |
1510 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1511 | { | |
1512 | int ret; | |
1513 | struct sockaddr_in *sin; | |
1514 | ||
1515 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1516 | iw_conn_req_handler, | |
1517 | id_priv); | |
1518 | if (IS_ERR(id_priv->cm_id.iw)) | |
1519 | return PTR_ERR(id_priv->cm_id.iw); | |
1520 | ||
1521 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1522 | id_priv->cm_id.iw->local_addr = *sin; | |
1523 | ||
1524 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1525 | ||
1526 | if (ret) { | |
1527 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1528 | id_priv->cm_id.iw = NULL; | |
1529 | } | |
1530 | ||
1531 | return ret; | |
1532 | } | |
1533 | ||
e51060f0 SH |
1534 | static int cma_listen_handler(struct rdma_cm_id *id, |
1535 | struct rdma_cm_event *event) | |
1536 | { | |
1537 | struct rdma_id_private *id_priv = id->context; | |
1538 | ||
1539 | id->context = id_priv->id.context; | |
1540 | id->event_handler = id_priv->id.event_handler; | |
1541 | return id_priv->id.event_handler(id, event); | |
1542 | } | |
1543 | ||
1544 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1545 | struct cma_device *cma_dev) | |
1546 | { | |
1547 | struct rdma_id_private *dev_id_priv; | |
1548 | struct rdma_cm_id *id; | |
1549 | int ret; | |
1550 | ||
1551 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1552 | if (IS_ERR(id)) | |
1553 | return; | |
1554 | ||
1555 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1556 | ||
1557 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1558 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
3f446754 | 1559 | ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); |
e51060f0 SH |
1560 | |
1561 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1562 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
d02d1f53 SH |
1563 | atomic_inc(&id_priv->refcount); |
1564 | dev_id_priv->internal_id = 1; | |
e51060f0 SH |
1565 | |
1566 | ret = rdma_listen(id, id_priv->backlog); | |
1567 | if (ret) | |
d02d1f53 | 1568 | printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " |
468f2239 | 1569 | "listening on device %s\n", ret, cma_dev->device->name); |
e51060f0 SH |
1570 | } |
1571 | ||
1572 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1573 | { | |
1574 | struct cma_device *cma_dev; | |
1575 | ||
1576 | mutex_lock(&lock); | |
1577 | list_add_tail(&id_priv->list, &listen_any_list); | |
1578 | list_for_each_entry(cma_dev, &dev_list, list) | |
1579 | cma_listen_on_dev(id_priv, cma_dev); | |
1580 | mutex_unlock(&lock); | |
1581 | } | |
1582 | ||
a81c994d SH |
1583 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
1584 | { | |
1585 | struct rdma_id_private *id_priv; | |
1586 | ||
1587 | id_priv = container_of(id, struct rdma_id_private, id); | |
1588 | id_priv->tos = (u8) tos; | |
1589 | } | |
1590 | EXPORT_SYMBOL(rdma_set_service_type); | |
1591 | ||
e51060f0 SH |
1592 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
1593 | void *context) | |
1594 | { | |
1595 | struct cma_work *work = context; | |
1596 | struct rdma_route *route; | |
1597 | ||
1598 | route = &work->id->id.route; | |
1599 | ||
1600 | if (!status) { | |
1601 | route->num_paths = 1; | |
1602 | *route->path_rec = *path_rec; | |
1603 | } else { | |
1604 | work->old_state = CMA_ROUTE_QUERY; | |
1605 | work->new_state = CMA_ADDR_RESOLVED; | |
1606 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1607 | work->event.status = status; |
e51060f0 SH |
1608 | } |
1609 | ||
1610 | queue_work(cma_wq, &work->work); | |
1611 | } | |
1612 | ||
1613 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1614 | struct cma_work *work) | |
1615 | { | |
a81c994d | 1616 | struct rdma_addr *addr = &id_priv->id.route.addr; |
e51060f0 | 1617 | struct ib_sa_path_rec path_rec; |
a81c994d SH |
1618 | ib_sa_comp_mask comp_mask; |
1619 | struct sockaddr_in6 *sin6; | |
e51060f0 SH |
1620 | |
1621 | memset(&path_rec, 0, sizeof path_rec); | |
6f8372b6 SH |
1622 | rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
1623 | rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); | |
a81c994d | 1624 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); |
e51060f0 | 1625 | path_rec.numb_path = 1; |
962063e6 | 1626 | path_rec.reversible = 1; |
3f446754 RD |
1627 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, |
1628 | (struct sockaddr *) &addr->dst_addr); | |
a81c994d SH |
1629 | |
1630 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1631 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | | |
1632 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; | |
1633 | ||
3f446754 | 1634 | if (addr->src_addr.ss_family == AF_INET) { |
a81c994d SH |
1635 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); |
1636 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; | |
1637 | } else { | |
1638 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; | |
1639 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); | |
1640 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; | |
1641 | } | |
e51060f0 | 1642 | |
c1a0b23b | 1643 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
a81c994d SH |
1644 | id_priv->id.port_num, &path_rec, |
1645 | comp_mask, timeout_ms, | |
1646 | GFP_KERNEL, cma_query_handler, | |
1647 | work, &id_priv->query); | |
e51060f0 SH |
1648 | |
1649 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1650 | } | |
1651 | ||
c4028958 | 1652 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1653 | { |
c4028958 | 1654 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1655 | struct rdma_id_private *id_priv = work->id; |
1656 | int destroy = 0; | |
1657 | ||
de910bd9 | 1658 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
1659 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) |
1660 | goto out; | |
1661 | ||
1662 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1663 | cma_exch(id_priv, CMA_DESTROYING); | |
1664 | destroy = 1; | |
1665 | } | |
1666 | out: | |
de910bd9 | 1667 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1668 | cma_deref_id(id_priv); |
1669 | if (destroy) | |
1670 | rdma_destroy_id(&id_priv->id); | |
1671 | kfree(work); | |
1672 | } | |
1673 | ||
dd5bdff8 OG |
1674 | static void cma_ndev_work_handler(struct work_struct *_work) |
1675 | { | |
1676 | struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); | |
1677 | struct rdma_id_private *id_priv = work->id; | |
1678 | int destroy = 0; | |
1679 | ||
1680 | mutex_lock(&id_priv->handler_mutex); | |
1681 | if (id_priv->state == CMA_DESTROYING || | |
1682 | id_priv->state == CMA_DEVICE_REMOVAL) | |
1683 | goto out; | |
1684 | ||
1685 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1686 | cma_exch(id_priv, CMA_DESTROYING); | |
1687 | destroy = 1; | |
1688 | } | |
1689 | ||
1690 | out: | |
1691 | mutex_unlock(&id_priv->handler_mutex); | |
1692 | cma_deref_id(id_priv); | |
1693 | if (destroy) | |
1694 | rdma_destroy_id(&id_priv->id); | |
1695 | kfree(work); | |
1696 | } | |
1697 | ||
e51060f0 SH |
1698 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) |
1699 | { | |
1700 | struct rdma_route *route = &id_priv->id.route; | |
1701 | struct cma_work *work; | |
1702 | int ret; | |
1703 | ||
1704 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1705 | if (!work) | |
1706 | return -ENOMEM; | |
1707 | ||
1708 | work->id = id_priv; | |
c4028958 | 1709 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1710 | work->old_state = CMA_ROUTE_QUERY; |
1711 | work->new_state = CMA_ROUTE_RESOLVED; | |
1712 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1713 | ||
1714 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1715 | if (!route->path_rec) { | |
1716 | ret = -ENOMEM; | |
1717 | goto err1; | |
1718 | } | |
1719 | ||
1720 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1721 | if (ret) | |
1722 | goto err2; | |
1723 | ||
1724 | return 0; | |
1725 | err2: | |
1726 | kfree(route->path_rec); | |
1727 | route->path_rec = NULL; | |
1728 | err1: | |
1729 | kfree(work); | |
1730 | return ret; | |
1731 | } | |
1732 | ||
1733 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1734 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1735 | { | |
1736 | struct rdma_id_private *id_priv; | |
1737 | int ret; | |
1738 | ||
1739 | id_priv = container_of(id, struct rdma_id_private, id); | |
1740 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1741 | return -EINVAL; | |
1742 | ||
9893e742 JL |
1743 | id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, |
1744 | GFP_KERNEL); | |
e51060f0 SH |
1745 | if (!id->route.path_rec) { |
1746 | ret = -ENOMEM; | |
1747 | goto err; | |
1748 | } | |
1749 | ||
ae2d9293 | 1750 | id->route.num_paths = num_paths; |
e51060f0 SH |
1751 | return 0; |
1752 | err: | |
1753 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1754 | return ret; | |
1755 | } | |
1756 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1757 | ||
07ebafba TT |
1758 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1759 | { | |
1760 | struct cma_work *work; | |
1761 | ||
1762 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1763 | if (!work) | |
1764 | return -ENOMEM; | |
1765 | ||
1766 | work->id = id_priv; | |
c4028958 | 1767 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1768 | work->old_state = CMA_ROUTE_QUERY; |
1769 | work->new_state = CMA_ROUTE_RESOLVED; | |
1770 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1771 | queue_work(cma_wq, &work->work); | |
1772 | return 0; | |
1773 | } | |
1774 | ||
3c86aa70 EC |
1775 | static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) |
1776 | { | |
1777 | struct rdma_route *route = &id_priv->id.route; | |
1778 | struct rdma_addr *addr = &route->addr; | |
1779 | struct cma_work *work; | |
1780 | int ret; | |
1781 | struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; | |
1782 | struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; | |
1783 | struct net_device *ndev = NULL; | |
af7bd463 | 1784 | u16 vid; |
3c86aa70 EC |
1785 | |
1786 | if (src_addr->sin_family != dst_addr->sin_family) | |
1787 | return -EINVAL; | |
1788 | ||
1789 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1790 | if (!work) | |
1791 | return -ENOMEM; | |
1792 | ||
1793 | work->id = id_priv; | |
1794 | INIT_WORK(&work->work, cma_work_handler); | |
1795 | ||
1796 | route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1797 | if (!route->path_rec) { | |
1798 | ret = -ENOMEM; | |
1799 | goto err1; | |
1800 | } | |
1801 | ||
1802 | route->num_paths = 1; | |
1803 | ||
3c86aa70 EC |
1804 | if (addr->dev_addr.bound_dev_if) |
1805 | ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); | |
1806 | if (!ndev) { | |
1807 | ret = -ENODEV; | |
1808 | goto err2; | |
1809 | } | |
1810 | ||
af7bd463 EC |
1811 | vid = rdma_vlan_dev_vlan_id(ndev); |
1812 | ||
1813 | iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); | |
1814 | iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); | |
1815 | ||
1816 | route->path_rec->hop_limit = 1; | |
1817 | route->path_rec->reversible = 1; | |
1818 | route->path_rec->pkey = cpu_to_be16(0xffff); | |
1819 | route->path_rec->mtu_selector = IB_SA_EQ; | |
1820 | route->path_rec->sl = id_priv->tos >> 5; | |
1821 | ||
3c86aa70 EC |
1822 | route->path_rec->mtu = iboe_get_mtu(ndev->mtu); |
1823 | route->path_rec->rate_selector = IB_SA_EQ; | |
1824 | route->path_rec->rate = iboe_get_rate(ndev); | |
1825 | dev_put(ndev); | |
1826 | route->path_rec->packet_life_time_selector = IB_SA_EQ; | |
1827 | route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; | |
1828 | if (!route->path_rec->mtu) { | |
1829 | ret = -EINVAL; | |
1830 | goto err2; | |
1831 | } | |
1832 | ||
1833 | work->old_state = CMA_ROUTE_QUERY; | |
1834 | work->new_state = CMA_ROUTE_RESOLVED; | |
1835 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1836 | work->event.status = 0; | |
1837 | ||
1838 | queue_work(cma_wq, &work->work); | |
1839 | ||
1840 | return 0; | |
1841 | ||
1842 | err2: | |
1843 | kfree(route->path_rec); | |
1844 | route->path_rec = NULL; | |
1845 | err1: | |
1846 | kfree(work); | |
1847 | return ret; | |
1848 | } | |
1849 | ||
e51060f0 SH |
1850 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1851 | { | |
1852 | struct rdma_id_private *id_priv; | |
1853 | int ret; | |
1854 | ||
1855 | id_priv = container_of(id, struct rdma_id_private, id); | |
1856 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1857 | return -EINVAL; | |
1858 | ||
1859 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1860 | switch (rdma_node_get_transport(id->device->node_type)) { |
1861 | case RDMA_TRANSPORT_IB: | |
3c86aa70 EC |
1862 | switch (rdma_port_get_link_layer(id->device, id->port_num)) { |
1863 | case IB_LINK_LAYER_INFINIBAND: | |
1864 | ret = cma_resolve_ib_route(id_priv, timeout_ms); | |
1865 | break; | |
1866 | case IB_LINK_LAYER_ETHERNET: | |
1867 | ret = cma_resolve_iboe_route(id_priv); | |
1868 | break; | |
1869 | default: | |
1870 | ret = -ENOSYS; | |
1871 | } | |
e51060f0 | 1872 | break; |
07ebafba TT |
1873 | case RDMA_TRANSPORT_IWARP: |
1874 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1875 | break; | |
e51060f0 SH |
1876 | default: |
1877 | ret = -ENOSYS; | |
1878 | break; | |
1879 | } | |
1880 | if (ret) | |
1881 | goto err; | |
1882 | ||
1883 | return 0; | |
1884 | err: | |
1885 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1886 | cma_deref_id(id_priv); | |
1887 | return ret; | |
1888 | } | |
1889 | EXPORT_SYMBOL(rdma_resolve_route); | |
1890 | ||
1891 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1892 | { | |
1893 | struct cma_device *cma_dev; | |
1894 | struct ib_port_attr port_attr; | |
f0ee3404 | 1895 | union ib_gid gid; |
e51060f0 SH |
1896 | u16 pkey; |
1897 | int ret; | |
1898 | u8 p; | |
1899 | ||
1900 | mutex_lock(&lock); | |
e82153b5 KK |
1901 | if (list_empty(&dev_list)) { |
1902 | ret = -ENODEV; | |
1903 | goto out; | |
1904 | } | |
e51060f0 SH |
1905 | list_for_each_entry(cma_dev, &dev_list, list) |
1906 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1907 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1908 | port_attr.state == IB_PORT_ACTIVE) |
1909 | goto port_found; | |
1910 | ||
e82153b5 KK |
1911 | p = 1; |
1912 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1913 | |
1914 | port_found: | |
f0ee3404 | 1915 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1916 | if (ret) |
1917 | goto out; | |
1918 | ||
1919 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1920 | if (ret) | |
1921 | goto out; | |
1922 | ||
6f8372b6 | 1923 | id_priv->id.route.addr.dev_addr.dev_type = |
3c86aa70 | 1924 | (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? |
6f8372b6 SH |
1925 | ARPHRD_INFINIBAND : ARPHRD_ETHER; |
1926 | ||
1927 | rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1928 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1929 | id_priv->id.port_num = p; | |
1930 | cma_attach_to_dev(id_priv, cma_dev); | |
1931 | out: | |
1932 | mutex_unlock(&lock); | |
1933 | return ret; | |
1934 | } | |
1935 | ||
1936 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1937 | struct rdma_dev_addr *dev_addr, void *context) | |
1938 | { | |
1939 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1940 | struct rdma_cm_event event; |
e51060f0 | 1941 | |
a1b1b61f | 1942 | memset(&event, 0, sizeof event); |
de910bd9 | 1943 | mutex_lock(&id_priv->handler_mutex); |
a396d43a | 1944 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) |
61a73c70 | 1945 | goto out; |
61a73c70 SH |
1946 | |
1947 | if (!status && !id_priv->cma_dev) | |
e51060f0 SH |
1948 | status = cma_acquire_dev(id_priv); |
1949 | ||
1950 | if (status) { | |
61a73c70 | 1951 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1952 | goto out; |
a1b1b61f SH |
1953 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1954 | event.status = status; | |
e51060f0 | 1955 | } else { |
e51060f0 SH |
1956 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1957 | ip_addr_size(src_addr)); | |
a1b1b61f | 1958 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1959 | } |
1960 | ||
a1b1b61f | 1961 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 | 1962 | cma_exch(id_priv, CMA_DESTROYING); |
de910bd9 | 1963 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1964 | cma_deref_id(id_priv); |
1965 | rdma_destroy_id(&id_priv->id); | |
1966 | return; | |
1967 | } | |
1968 | out: | |
de910bd9 | 1969 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1970 | cma_deref_id(id_priv); |
1971 | } | |
1972 | ||
1973 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1974 | { | |
1975 | struct cma_work *work; | |
6f8372b6 | 1976 | struct sockaddr *src, *dst; |
f0ee3404 | 1977 | union ib_gid gid; |
e51060f0 SH |
1978 | int ret; |
1979 | ||
1980 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1981 | if (!work) | |
1982 | return -ENOMEM; | |
1983 | ||
1984 | if (!id_priv->cma_dev) { | |
1985 | ret = cma_bind_loopback(id_priv); | |
1986 | if (ret) | |
1987 | goto err; | |
1988 | } | |
1989 | ||
6f8372b6 SH |
1990 | rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1991 | rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 | 1992 | |
6f8372b6 SH |
1993 | src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
1994 | if (cma_zero_addr(src)) { | |
1995 | dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; | |
1996 | if ((src->sa_family = dst->sa_family) == AF_INET) { | |
1997 | ((struct sockaddr_in *) src)->sin_addr.s_addr = | |
1998 | ((struct sockaddr_in *) dst)->sin_addr.s_addr; | |
1999 | } else { | |
2000 | ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, | |
2001 | &((struct sockaddr_in6 *) dst)->sin6_addr); | |
2002 | } | |
e51060f0 SH |
2003 | } |
2004 | ||
2005 | work->id = id_priv; | |
c4028958 | 2006 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
2007 | work->old_state = CMA_ADDR_QUERY; |
2008 | work->new_state = CMA_ADDR_RESOLVED; | |
2009 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
2010 | queue_work(cma_wq, &work->work); | |
2011 | return 0; | |
2012 | err: | |
2013 | kfree(work); | |
2014 | return ret; | |
2015 | } | |
2016 | ||
2017 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
2018 | struct sockaddr *dst_addr) | |
2019 | { | |
d14714df SH |
2020 | if (!src_addr || !src_addr->sa_family) { |
2021 | src_addr = (struct sockaddr *) &id->route.addr.src_addr; | |
2022 | if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { | |
2023 | ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = | |
2024 | ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; | |
2025 | } | |
2026 | } | |
2027 | return rdma_bind_addr(id, src_addr); | |
e51060f0 SH |
2028 | } |
2029 | ||
2030 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
2031 | struct sockaddr *dst_addr, int timeout_ms) | |
2032 | { | |
2033 | struct rdma_id_private *id_priv; | |
2034 | int ret; | |
2035 | ||
2036 | id_priv = container_of(id, struct rdma_id_private, id); | |
2037 | if (id_priv->state == CMA_IDLE) { | |
2038 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
2039 | if (ret) | |
2040 | return ret; | |
2041 | } | |
2042 | ||
2043 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
2044 | return -EINVAL; | |
2045 | ||
2046 | atomic_inc(&id_priv->refcount); | |
2047 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
2048 | if (cma_any_addr(dst_addr)) | |
2049 | ret = cma_resolve_loopback(id_priv); | |
2050 | else | |
3f446754 | 2051 | ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, |
7a118df3 | 2052 | dst_addr, &id->route.addr.dev_addr, |
e51060f0 SH |
2053 | timeout_ms, addr_handler, id_priv); |
2054 | if (ret) | |
2055 | goto err; | |
2056 | ||
2057 | return 0; | |
2058 | err: | |
2059 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
2060 | cma_deref_id(id_priv); | |
2061 | return ret; | |
2062 | } | |
2063 | EXPORT_SYMBOL(rdma_resolve_addr); | |
2064 | ||
a9bb7912 HS |
2065 | int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) |
2066 | { | |
2067 | struct rdma_id_private *id_priv; | |
2068 | unsigned long flags; | |
2069 | int ret; | |
2070 | ||
2071 | id_priv = container_of(id, struct rdma_id_private, id); | |
2072 | spin_lock_irqsave(&id_priv->lock, flags); | |
2073 | if (id_priv->state == CMA_IDLE) { | |
2074 | id_priv->reuseaddr = reuse; | |
2075 | ret = 0; | |
2076 | } else { | |
2077 | ret = -EINVAL; | |
2078 | } | |
2079 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
2080 | return ret; | |
2081 | } | |
2082 | EXPORT_SYMBOL(rdma_set_reuseaddr); | |
2083 | ||
e51060f0 SH |
2084 | static void cma_bind_port(struct rdma_bind_list *bind_list, |
2085 | struct rdma_id_private *id_priv) | |
2086 | { | |
2087 | struct sockaddr_in *sin; | |
2088 | ||
2089 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
2090 | sin->sin_port = htons(bind_list->port); | |
2091 | id_priv->bind_list = bind_list; | |
2092 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
2093 | } | |
2094 | ||
2095 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
2096 | unsigned short snum) | |
2097 | { | |
2098 | struct rdma_bind_list *bind_list; | |
aedec080 | 2099 | int port, ret; |
e51060f0 | 2100 | |
cb164b8c | 2101 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
e51060f0 SH |
2102 | if (!bind_list) |
2103 | return -ENOMEM; | |
2104 | ||
aedec080 SH |
2105 | do { |
2106 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
2107 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
2108 | ||
2109 | if (ret) | |
2110 | goto err1; | |
2111 | ||
2112 | if (port != snum) { | |
2113 | ret = -EADDRNOTAVAIL; | |
2114 | goto err2; | |
2115 | } | |
2116 | ||
2117 | bind_list->ps = ps; | |
2118 | bind_list->port = (unsigned short) port; | |
2119 | cma_bind_port(bind_list, id_priv); | |
2120 | return 0; | |
2121 | err2: | |
2122 | idr_remove(ps, port); | |
2123 | err1: | |
2124 | kfree(bind_list); | |
2125 | return ret; | |
2126 | } | |
e51060f0 | 2127 | |
aedec080 SH |
2128 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
2129 | { | |
5d7220e8 TH |
2130 | static unsigned int last_used_port; |
2131 | int low, high, remaining; | |
2132 | unsigned int rover; | |
e51060f0 | 2133 | |
227b60f5 | 2134 | inet_get_local_port_range(&low, &high); |
5d7220e8 TH |
2135 | remaining = (high - low) + 1; |
2136 | rover = net_random() % remaining + low; | |
2137 | retry: | |
2138 | if (last_used_port != rover && | |
2139 | !idr_find(ps, (unsigned short) rover)) { | |
2140 | int ret = cma_alloc_port(ps, id_priv, rover); | |
2141 | /* | |
2142 | * Remember previously used port number in order to avoid | |
2143 | * re-using same port immediately after it is closed. | |
2144 | */ | |
2145 | if (!ret) | |
2146 | last_used_port = rover; | |
2147 | if (ret != -EADDRNOTAVAIL) | |
2148 | return ret; | |
e51060f0 | 2149 | } |
5d7220e8 TH |
2150 | if (--remaining) { |
2151 | rover++; | |
2152 | if ((rover < low) || (rover > high)) | |
2153 | rover = low; | |
2154 | goto retry; | |
2155 | } | |
2156 | return -EADDRNOTAVAIL; | |
e51060f0 SH |
2157 | } |
2158 | ||
a9bb7912 HS |
2159 | /* |
2160 | * Check that the requested port is available. This is called when trying to | |
2161 | * bind to a specific port, or when trying to listen on a bound port. In | |
2162 | * the latter case, the provided id_priv may already be on the bind_list, but | |
2163 | * we still need to check that it's okay to start listening. | |
2164 | */ | |
2165 | static int cma_check_port(struct rdma_bind_list *bind_list, | |
2166 | struct rdma_id_private *id_priv, uint8_t reuseaddr) | |
e51060f0 SH |
2167 | { |
2168 | struct rdma_id_private *cur_id; | |
43b752da | 2169 | struct sockaddr *addr, *cur_addr; |
e51060f0 | 2170 | struct hlist_node *node; |
e51060f0 | 2171 | |
43b752da | 2172 | addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
a9bb7912 | 2173 | if (cma_any_addr(addr) && !reuseaddr) |
e51060f0 SH |
2174 | return -EADDRNOTAVAIL; |
2175 | ||
2176 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
a9bb7912 HS |
2177 | if (id_priv == cur_id) |
2178 | continue; | |
3cd96564 | 2179 | |
a9bb7912 HS |
2180 | if ((cur_id->state == CMA_LISTEN) || |
2181 | !reuseaddr || !cur_id->reuseaddr) { | |
2182 | cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; | |
2183 | if (cma_any_addr(cur_addr)) | |
2184 | return -EADDRNOTAVAIL; | |
e51060f0 | 2185 | |
a9bb7912 HS |
2186 | if (!cma_addr_cmp(addr, cur_addr)) |
2187 | return -EADDRINUSE; | |
2188 | } | |
2189 | } | |
e51060f0 SH |
2190 | return 0; |
2191 | } | |
2192 | ||
a9bb7912 HS |
2193 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) |
2194 | { | |
2195 | struct rdma_bind_list *bind_list; | |
2196 | unsigned short snum; | |
2197 | int ret; | |
2198 | ||
2199 | snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)); | |
2200 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
2201 | return -EACCES; | |
2202 | ||
2203 | bind_list = idr_find(ps, snum); | |
2204 | if (!bind_list) { | |
2205 | ret = cma_alloc_port(ps, id_priv, snum); | |
2206 | } else { | |
2207 | ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); | |
2208 | if (!ret) | |
2209 | cma_bind_port(bind_list, id_priv); | |
2210 | } | |
2211 | return ret; | |
2212 | } | |
2213 | ||
2214 | static int cma_bind_listen(struct rdma_id_private *id_priv) | |
2215 | { | |
2216 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
2217 | int ret = 0; | |
2218 | ||
2219 | mutex_lock(&lock); | |
2220 | if (bind_list->owners.first->next) | |
2221 | ret = cma_check_port(bind_list, id_priv, 0); | |
2222 | mutex_unlock(&lock); | |
2223 | return ret; | |
2224 | } | |
2225 | ||
e51060f0 SH |
2226 | static int cma_get_port(struct rdma_id_private *id_priv) |
2227 | { | |
2228 | struct idr *ps; | |
2229 | int ret; | |
2230 | ||
2231 | switch (id_priv->id.ps) { | |
2232 | case RDMA_PS_SDP: | |
2233 | ps = &sdp_ps; | |
2234 | break; | |
2235 | case RDMA_PS_TCP: | |
2236 | ps = &tcp_ps; | |
2237 | break; | |
628e5f6d SH |
2238 | case RDMA_PS_UDP: |
2239 | ps = &udp_ps; | |
2240 | break; | |
c8f6a362 SH |
2241 | case RDMA_PS_IPOIB: |
2242 | ps = &ipoib_ps; | |
2243 | break; | |
e51060f0 SH |
2244 | default: |
2245 | return -EPROTONOSUPPORT; | |
2246 | } | |
2247 | ||
2248 | mutex_lock(&lock); | |
3f446754 | 2249 | if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
aedec080 | 2250 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
2251 | else |
2252 | ret = cma_use_port(ps, id_priv); | |
2253 | mutex_unlock(&lock); | |
2254 | ||
2255 | return ret; | |
2256 | } | |
2257 | ||
d14714df SH |
2258 | static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, |
2259 | struct sockaddr *addr) | |
2260 | { | |
fd4582a3 | 2261 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
d14714df SH |
2262 | struct sockaddr_in6 *sin6; |
2263 | ||
2264 | if (addr->sa_family != AF_INET6) | |
2265 | return 0; | |
2266 | ||
2267 | sin6 = (struct sockaddr_in6 *) addr; | |
2268 | if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && | |
2269 | !sin6->sin6_scope_id) | |
2270 | return -EINVAL; | |
2271 | ||
2272 | dev_addr->bound_dev_if = sin6->sin6_scope_id; | |
2273 | #endif | |
2274 | return 0; | |
2275 | } | |
2276 | ||
a9bb7912 HS |
2277 | int rdma_listen(struct rdma_cm_id *id, int backlog) |
2278 | { | |
2279 | struct rdma_id_private *id_priv; | |
2280 | int ret; | |
2281 | ||
2282 | id_priv = container_of(id, struct rdma_id_private, id); | |
2283 | if (id_priv->state == CMA_IDLE) { | |
2284 | ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; | |
2285 | ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); | |
2286 | if (ret) | |
2287 | return ret; | |
2288 | } | |
2289 | ||
2290 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
2291 | return -EINVAL; | |
2292 | ||
2293 | if (id_priv->reuseaddr) { | |
2294 | ret = cma_bind_listen(id_priv); | |
2295 | if (ret) | |
2296 | goto err; | |
2297 | } | |
2298 | ||
2299 | id_priv->backlog = backlog; | |
2300 | if (id->device) { | |
2301 | switch (rdma_node_get_transport(id->device->node_type)) { | |
2302 | case RDMA_TRANSPORT_IB: | |
2303 | ret = cma_ib_listen(id_priv); | |
2304 | if (ret) | |
2305 | goto err; | |
2306 | break; | |
2307 | case RDMA_TRANSPORT_IWARP: | |
2308 | ret = cma_iw_listen(id_priv, backlog); | |
2309 | if (ret) | |
2310 | goto err; | |
2311 | break; | |
2312 | default: | |
2313 | ret = -ENOSYS; | |
2314 | goto err; | |
2315 | } | |
2316 | } else | |
2317 | cma_listen_on_all(id_priv); | |
2318 | ||
2319 | return 0; | |
2320 | err: | |
2321 | id_priv->backlog = 0; | |
2322 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
2323 | return ret; | |
2324 | } | |
2325 | EXPORT_SYMBOL(rdma_listen); | |
2326 | ||
e51060f0 SH |
2327 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) |
2328 | { | |
2329 | struct rdma_id_private *id_priv; | |
2330 | int ret; | |
2331 | ||
1f5175ad | 2332 | if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) |
e51060f0 SH |
2333 | return -EAFNOSUPPORT; |
2334 | ||
2335 | id_priv = container_of(id, struct rdma_id_private, id); | |
2336 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
2337 | return -EINVAL; | |
2338 | ||
d14714df SH |
2339 | ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); |
2340 | if (ret) | |
2341 | goto err1; | |
2342 | ||
8523c048 | 2343 | if (!cma_any_addr(addr)) { |
e51060f0 | 2344 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); |
e51060f0 | 2345 | if (ret) |
255d0c14 KK |
2346 | goto err1; |
2347 | ||
255d0c14 | 2348 | ret = cma_acquire_dev(id_priv); |
255d0c14 KK |
2349 | if (ret) |
2350 | goto err1; | |
e51060f0 SH |
2351 | } |
2352 | ||
2353 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
2354 | ret = cma_get_port(id_priv); | |
2355 | if (ret) | |
255d0c14 | 2356 | goto err2; |
e51060f0 SH |
2357 | |
2358 | return 0; | |
255d0c14 | 2359 | err2: |
a396d43a SH |
2360 | if (id_priv->cma_dev) |
2361 | cma_release_dev(id_priv); | |
255d0c14 | 2362 | err1: |
e51060f0 SH |
2363 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
2364 | return ret; | |
2365 | } | |
2366 | EXPORT_SYMBOL(rdma_bind_addr); | |
2367 | ||
2368 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
2369 | struct rdma_route *route) | |
2370 | { | |
e51060f0 SH |
2371 | struct cma_hdr *cma_hdr; |
2372 | struct sdp_hh *sdp_hdr; | |
2373 | ||
1f5175ad AS |
2374 | if (route->addr.src_addr.ss_family == AF_INET) { |
2375 | struct sockaddr_in *src4, *dst4; | |
2376 | ||
2377 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
2378 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
2379 | ||
2380 | switch (ps) { | |
2381 | case RDMA_PS_SDP: | |
2382 | sdp_hdr = hdr; | |
2383 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2384 | return -EINVAL; | |
2385 | sdp_set_ip_ver(sdp_hdr, 4); | |
2386 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2387 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2388 | sdp_hdr->port = src4->sin_port; | |
2389 | break; | |
2390 | default: | |
2391 | cma_hdr = hdr; | |
2392 | cma_hdr->cma_version = CMA_VERSION; | |
2393 | cma_set_ip_ver(cma_hdr, 4); | |
2394 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2395 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2396 | cma_hdr->port = src4->sin_port; | |
2397 | break; | |
2398 | } | |
2399 | } else { | |
2400 | struct sockaddr_in6 *src6, *dst6; | |
2401 | ||
2402 | src6 = (struct sockaddr_in6 *) &route->addr.src_addr; | |
2403 | dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; | |
2404 | ||
2405 | switch (ps) { | |
2406 | case RDMA_PS_SDP: | |
2407 | sdp_hdr = hdr; | |
2408 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2409 | return -EINVAL; | |
2410 | sdp_set_ip_ver(sdp_hdr, 6); | |
2411 | sdp_hdr->src_addr.ip6 = src6->sin6_addr; | |
2412 | sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2413 | sdp_hdr->port = src6->sin6_port; | |
2414 | break; | |
2415 | default: | |
2416 | cma_hdr = hdr; | |
2417 | cma_hdr->cma_version = CMA_VERSION; | |
2418 | cma_set_ip_ver(cma_hdr, 6); | |
2419 | cma_hdr->src_addr.ip6 = src6->sin6_addr; | |
2420 | cma_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2421 | cma_hdr->port = src6->sin6_port; | |
2422 | break; | |
2423 | } | |
e51060f0 SH |
2424 | } |
2425 | return 0; | |
2426 | } | |
2427 | ||
628e5f6d SH |
2428 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
2429 | struct ib_cm_event *ib_event) | |
2430 | { | |
2431 | struct rdma_id_private *id_priv = cm_id->context; | |
2432 | struct rdma_cm_event event; | |
2433 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
2434 | int ret = 0; | |
2435 | ||
de910bd9 | 2436 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
8aa08602 | 2437 | return 0; |
628e5f6d | 2438 | |
8aa08602 | 2439 | memset(&event, 0, sizeof event); |
628e5f6d SH |
2440 | switch (ib_event->event) { |
2441 | case IB_CM_SIDR_REQ_ERROR: | |
2442 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2443 | event.status = -ETIMEDOUT; | |
2444 | break; | |
2445 | case IB_CM_SIDR_REP_RECEIVED: | |
2446 | event.param.ud.private_data = ib_event->private_data; | |
2447 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
2448 | if (rep->status != IB_SIDR_SUCCESS) { | |
2449 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2450 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
2451 | break; | |
2452 | } | |
d2ca39f2 YE |
2453 | ret = cma_set_qkey(id_priv); |
2454 | if (ret) { | |
2455 | event.event = RDMA_CM_EVENT_ADDR_ERROR; | |
2456 | event.status = -EINVAL; | |
2457 | break; | |
2458 | } | |
c8f6a362 | 2459 | if (id_priv->qkey != rep->qkey) { |
628e5f6d SH |
2460 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
2461 | event.status = -EINVAL; | |
2462 | break; | |
2463 | } | |
2464 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
2465 | id_priv->id.route.path_rec, | |
2466 | &event.param.ud.ah_attr); | |
2467 | event.param.ud.qp_num = rep->qpn; | |
2468 | event.param.ud.qkey = rep->qkey; | |
2469 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
2470 | event.status = 0; | |
2471 | break; | |
2472 | default: | |
468f2239 | 2473 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
628e5f6d SH |
2474 | ib_event->event); |
2475 | goto out; | |
2476 | } | |
2477 | ||
2478 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2479 | if (ret) { | |
2480 | /* Destroy the CM ID by returning a non-zero value. */ | |
2481 | id_priv->cm_id.ib = NULL; | |
2482 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2483 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2484 | rdma_destroy_id(&id_priv->id); |
2485 | return ret; | |
2486 | } | |
2487 | out: | |
de910bd9 | 2488 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2489 | return ret; |
2490 | } | |
2491 | ||
2492 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
2493 | struct rdma_conn_param *conn_param) | |
2494 | { | |
2495 | struct ib_cm_sidr_req_param req; | |
2496 | struct rdma_route *route; | |
2497 | int ret; | |
2498 | ||
2499 | req.private_data_len = sizeof(struct cma_hdr) + | |
2500 | conn_param->private_data_len; | |
2501 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2502 | if (!req.private_data) | |
2503 | return -ENOMEM; | |
2504 | ||
2505 | if (conn_param->private_data && conn_param->private_data_len) | |
2506 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2507 | conn_param->private_data, conn_param->private_data_len); | |
2508 | ||
2509 | route = &id_priv->id.route; | |
2510 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2511 | if (ret) | |
2512 | goto out; | |
2513 | ||
2514 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2515 | cma_sidr_rep_handler, id_priv); | |
2516 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2517 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2518 | goto out; | |
2519 | } | |
2520 | ||
2521 | req.path = route->path_rec; | |
2522 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2523 | (struct sockaddr *) &route->addr.dst_addr); |
628e5f6d SH |
2524 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); |
2525 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2526 | ||
2527 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2528 | if (ret) { | |
2529 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2530 | id_priv->cm_id.ib = NULL; | |
2531 | } | |
2532 | out: | |
2533 | kfree(req.private_data); | |
2534 | return ret; | |
2535 | } | |
2536 | ||
e51060f0 SH |
2537 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2538 | struct rdma_conn_param *conn_param) | |
2539 | { | |
2540 | struct ib_cm_req_param req; | |
2541 | struct rdma_route *route; | |
2542 | void *private_data; | |
2543 | int offset, ret; | |
2544 | ||
2545 | memset(&req, 0, sizeof req); | |
2546 | offset = cma_user_data_offset(id_priv->id.ps); | |
2547 | req.private_data_len = offset + conn_param->private_data_len; | |
2548 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2549 | if (!private_data) | |
2550 | return -ENOMEM; | |
2551 | ||
2552 | if (conn_param->private_data && conn_param->private_data_len) | |
2553 | memcpy(private_data + offset, conn_param->private_data, | |
2554 | conn_param->private_data_len); | |
2555 | ||
2556 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2557 | id_priv); | |
2558 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2559 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2560 | goto out; | |
2561 | } | |
2562 | ||
2563 | route = &id_priv->id.route; | |
2564 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2565 | if (ret) | |
2566 | goto out; | |
2567 | req.private_data = private_data; | |
2568 | ||
2569 | req.primary_path = &route->path_rec[0]; | |
2570 | if (route->num_paths == 2) | |
2571 | req.alternate_path = &route->path_rec[1]; | |
2572 | ||
2573 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2574 | (struct sockaddr *) &route->addr.dst_addr); |
e51060f0 | 2575 | req.qp_num = id_priv->qp_num; |
9b2e9c0c | 2576 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2577 | req.starting_psn = id_priv->seq_num; |
2578 | req.responder_resources = conn_param->responder_resources; | |
2579 | req.initiator_depth = conn_param->initiator_depth; | |
2580 | req.flow_control = conn_param->flow_control; | |
2581 | req.retry_count = conn_param->retry_count; | |
2582 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2583 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2584 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2585 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2586 | req.srq = id_priv->srq ? 1 : 0; | |
2587 | ||
2588 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2589 | out: | |
675a027c KK |
2590 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2591 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2592 | id_priv->cm_id.ib = NULL; | |
2593 | } | |
2594 | ||
e51060f0 SH |
2595 | kfree(private_data); |
2596 | return ret; | |
2597 | } | |
2598 | ||
07ebafba TT |
2599 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2600 | struct rdma_conn_param *conn_param) | |
2601 | { | |
2602 | struct iw_cm_id *cm_id; | |
2603 | struct sockaddr_in* sin; | |
2604 | int ret; | |
2605 | struct iw_cm_conn_param iw_param; | |
2606 | ||
2607 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2608 | if (IS_ERR(cm_id)) { | |
2609 | ret = PTR_ERR(cm_id); | |
2610 | goto out; | |
2611 | } | |
2612 | ||
2613 | id_priv->cm_id.iw = cm_id; | |
2614 | ||
2615 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2616 | cm_id->local_addr = *sin; | |
2617 | ||
2618 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2619 | cm_id->remote_addr = *sin; | |
2620 | ||
5851bb89 | 2621 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
675a027c KK |
2622 | if (ret) |
2623 | goto out; | |
07ebafba TT |
2624 | |
2625 | iw_param.ord = conn_param->initiator_depth; | |
2626 | iw_param.ird = conn_param->responder_resources; | |
2627 | iw_param.private_data = conn_param->private_data; | |
2628 | iw_param.private_data_len = conn_param->private_data_len; | |
2629 | if (id_priv->id.qp) | |
2630 | iw_param.qpn = id_priv->qp_num; | |
2631 | else | |
2632 | iw_param.qpn = conn_param->qp_num; | |
2633 | ret = iw_cm_connect(cm_id, &iw_param); | |
2634 | out: | |
675a027c KK |
2635 | if (ret && !IS_ERR(cm_id)) { |
2636 | iw_destroy_cm_id(cm_id); | |
2637 | id_priv->cm_id.iw = NULL; | |
2638 | } | |
07ebafba TT |
2639 | return ret; |
2640 | } | |
2641 | ||
e51060f0 SH |
2642 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2643 | { | |
2644 | struct rdma_id_private *id_priv; | |
2645 | int ret; | |
2646 | ||
2647 | id_priv = container_of(id, struct rdma_id_private, id); | |
2648 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2649 | return -EINVAL; | |
2650 | ||
2651 | if (!id->qp) { | |
2652 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2653 | id_priv->srq = conn_param->srq; |
2654 | } | |
2655 | ||
07ebafba TT |
2656 | switch (rdma_node_get_transport(id->device->node_type)) { |
2657 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2658 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2659 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
2660 | else | |
2661 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2662 | break; |
07ebafba TT |
2663 | case RDMA_TRANSPORT_IWARP: |
2664 | ret = cma_connect_iw(id_priv, conn_param); | |
2665 | break; | |
e51060f0 SH |
2666 | default: |
2667 | ret = -ENOSYS; | |
2668 | break; | |
2669 | } | |
2670 | if (ret) | |
2671 | goto err; | |
2672 | ||
2673 | return 0; | |
2674 | err: | |
2675 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2676 | return ret; | |
2677 | } | |
2678 | EXPORT_SYMBOL(rdma_connect); | |
2679 | ||
2680 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2681 | struct rdma_conn_param *conn_param) | |
2682 | { | |
2683 | struct ib_cm_rep_param rep; | |
5851bb89 | 2684 | int ret; |
0fe313b0 | 2685 | |
5851bb89 SH |
2686 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
2687 | if (ret) | |
2688 | goto out; | |
0fe313b0 | 2689 | |
5851bb89 SH |
2690 | ret = cma_modify_qp_rts(id_priv, conn_param); |
2691 | if (ret) | |
2692 | goto out; | |
e51060f0 SH |
2693 | |
2694 | memset(&rep, 0, sizeof rep); | |
2695 | rep.qp_num = id_priv->qp_num; | |
2696 | rep.starting_psn = id_priv->seq_num; | |
2697 | rep.private_data = conn_param->private_data; | |
2698 | rep.private_data_len = conn_param->private_data_len; | |
2699 | rep.responder_resources = conn_param->responder_resources; | |
2700 | rep.initiator_depth = conn_param->initiator_depth; | |
e51060f0 SH |
2701 | rep.failover_accepted = 0; |
2702 | rep.flow_control = conn_param->flow_control; | |
2703 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2704 | rep.srq = id_priv->srq ? 1 : 0; | |
2705 | ||
0fe313b0 SH |
2706 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2707 | out: | |
2708 | return ret; | |
e51060f0 SH |
2709 | } |
2710 | ||
07ebafba TT |
2711 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2712 | struct rdma_conn_param *conn_param) | |
2713 | { | |
2714 | struct iw_cm_conn_param iw_param; | |
2715 | int ret; | |
2716 | ||
5851bb89 | 2717 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
07ebafba TT |
2718 | if (ret) |
2719 | return ret; | |
2720 | ||
2721 | iw_param.ord = conn_param->initiator_depth; | |
2722 | iw_param.ird = conn_param->responder_resources; | |
2723 | iw_param.private_data = conn_param->private_data; | |
2724 | iw_param.private_data_len = conn_param->private_data_len; | |
2725 | if (id_priv->id.qp) { | |
2726 | iw_param.qpn = id_priv->qp_num; | |
2727 | } else | |
2728 | iw_param.qpn = conn_param->qp_num; | |
2729 | ||
2730 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2731 | } | |
2732 | ||
628e5f6d SH |
2733 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2734 | enum ib_cm_sidr_status status, | |
2735 | const void *private_data, int private_data_len) | |
2736 | { | |
2737 | struct ib_cm_sidr_rep_param rep; | |
d2ca39f2 | 2738 | int ret; |
628e5f6d SH |
2739 | |
2740 | memset(&rep, 0, sizeof rep); | |
2741 | rep.status = status; | |
2742 | if (status == IB_SIDR_SUCCESS) { | |
d2ca39f2 YE |
2743 | ret = cma_set_qkey(id_priv); |
2744 | if (ret) | |
2745 | return ret; | |
628e5f6d | 2746 | rep.qp_num = id_priv->qp_num; |
c8f6a362 | 2747 | rep.qkey = id_priv->qkey; |
628e5f6d SH |
2748 | } |
2749 | rep.private_data = private_data; | |
2750 | rep.private_data_len = private_data_len; | |
2751 | ||
2752 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2753 | } | |
2754 | ||
e51060f0 SH |
2755 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2756 | { | |
2757 | struct rdma_id_private *id_priv; | |
2758 | int ret; | |
2759 | ||
2760 | id_priv = container_of(id, struct rdma_id_private, id); | |
2761 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2762 | return -EINVAL; | |
2763 | ||
2764 | if (!id->qp && conn_param) { | |
2765 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2766 | id_priv->srq = conn_param->srq; |
2767 | } | |
2768 | ||
07ebafba TT |
2769 | switch (rdma_node_get_transport(id->device->node_type)) { |
2770 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2771 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2772 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
2773 | conn_param->private_data, | |
2774 | conn_param->private_data_len); | |
2775 | else if (conn_param) | |
e51060f0 SH |
2776 | ret = cma_accept_ib(id_priv, conn_param); |
2777 | else | |
2778 | ret = cma_rep_recv(id_priv); | |
2779 | break; | |
07ebafba TT |
2780 | case RDMA_TRANSPORT_IWARP: |
2781 | ret = cma_accept_iw(id_priv, conn_param); | |
2782 | break; | |
e51060f0 SH |
2783 | default: |
2784 | ret = -ENOSYS; | |
2785 | break; | |
2786 | } | |
2787 | ||
2788 | if (ret) | |
2789 | goto reject; | |
2790 | ||
2791 | return 0; | |
2792 | reject: | |
c5483388 | 2793 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
2794 | rdma_reject(id, NULL, 0); |
2795 | return ret; | |
2796 | } | |
2797 | EXPORT_SYMBOL(rdma_accept); | |
2798 | ||
0fe313b0 SH |
2799 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2800 | { | |
2801 | struct rdma_id_private *id_priv; | |
2802 | int ret; | |
2803 | ||
2804 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2805 | if (!cma_has_cm_dev(id_priv)) |
0fe313b0 SH |
2806 | return -EINVAL; |
2807 | ||
2808 | switch (id->device->node_type) { | |
2809 | case RDMA_NODE_IB_CA: | |
2810 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2811 | break; | |
2812 | default: | |
2813 | ret = 0; | |
2814 | break; | |
2815 | } | |
2816 | return ret; | |
2817 | } | |
2818 | EXPORT_SYMBOL(rdma_notify); | |
2819 | ||
e51060f0 SH |
2820 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2821 | u8 private_data_len) | |
2822 | { | |
2823 | struct rdma_id_private *id_priv; | |
2824 | int ret; | |
2825 | ||
2826 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2827 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2828 | return -EINVAL; |
2829 | ||
07ebafba TT |
2830 | switch (rdma_node_get_transport(id->device->node_type)) { |
2831 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2832 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2833 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
2834 | private_data, private_data_len); | |
2835 | else | |
2836 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2837 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2838 | 0, private_data, private_data_len); | |
e51060f0 | 2839 | break; |
07ebafba TT |
2840 | case RDMA_TRANSPORT_IWARP: |
2841 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2842 | private_data, private_data_len); | |
2843 | break; | |
e51060f0 SH |
2844 | default: |
2845 | ret = -ENOSYS; | |
2846 | break; | |
2847 | } | |
2848 | return ret; | |
2849 | } | |
2850 | EXPORT_SYMBOL(rdma_reject); | |
2851 | ||
2852 | int rdma_disconnect(struct rdma_cm_id *id) | |
2853 | { | |
2854 | struct rdma_id_private *id_priv; | |
2855 | int ret; | |
2856 | ||
2857 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2858 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2859 | return -EINVAL; |
2860 | ||
07ebafba TT |
2861 | switch (rdma_node_get_transport(id->device->node_type)) { |
2862 | case RDMA_TRANSPORT_IB: | |
c5483388 | 2863 | ret = cma_modify_qp_err(id_priv); |
07ebafba TT |
2864 | if (ret) |
2865 | goto out; | |
e51060f0 SH |
2866 | /* Initiate or respond to a disconnect. */ |
2867 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2868 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2869 | break; | |
07ebafba TT |
2870 | case RDMA_TRANSPORT_IWARP: |
2871 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2872 | break; | |
e51060f0 | 2873 | default: |
07ebafba | 2874 | ret = -EINVAL; |
e51060f0 SH |
2875 | break; |
2876 | } | |
2877 | out: | |
2878 | return ret; | |
2879 | } | |
2880 | EXPORT_SYMBOL(rdma_disconnect); | |
2881 | ||
c8f6a362 SH |
2882 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
2883 | { | |
2884 | struct rdma_id_private *id_priv; | |
2885 | struct cma_multicast *mc = multicast->context; | |
2886 | struct rdma_cm_event event; | |
2887 | int ret; | |
2888 | ||
2889 | id_priv = mc->id_priv; | |
de910bd9 OG |
2890 | if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && |
2891 | cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) | |
8aa08602 | 2892 | return 0; |
c8f6a362 | 2893 | |
c5483388 | 2894 | mutex_lock(&id_priv->qp_mutex); |
c8f6a362 SH |
2895 | if (!status && id_priv->id.qp) |
2896 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, | |
2897 | multicast->rec.mlid); | |
c5483388 | 2898 | mutex_unlock(&id_priv->qp_mutex); |
c8f6a362 SH |
2899 | |
2900 | memset(&event, 0, sizeof event); | |
2901 | event.status = status; | |
2902 | event.param.ud.private_data = mc->context; | |
2903 | if (!status) { | |
2904 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; | |
2905 | ib_init_ah_from_mcmember(id_priv->id.device, | |
2906 | id_priv->id.port_num, &multicast->rec, | |
2907 | &event.param.ud.ah_attr); | |
2908 | event.param.ud.qp_num = 0xFFFFFF; | |
2909 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); | |
2910 | } else | |
2911 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; | |
2912 | ||
2913 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2914 | if (ret) { | |
2915 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2916 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2917 | rdma_destroy_id(&id_priv->id); |
2918 | return 0; | |
2919 | } | |
8aa08602 | 2920 | |
de910bd9 | 2921 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2922 | return 0; |
2923 | } | |
2924 | ||
2925 | static void cma_set_mgid(struct rdma_id_private *id_priv, | |
2926 | struct sockaddr *addr, union ib_gid *mgid) | |
2927 | { | |
2928 | unsigned char mc_map[MAX_ADDR_LEN]; | |
2929 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2930 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; | |
2931 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; | |
2932 | ||
2933 | if (cma_any_addr(addr)) { | |
2934 | memset(mgid, 0, sizeof *mgid); | |
2935 | } else if ((addr->sa_family == AF_INET6) && | |
1c9b2819 | 2936 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == |
c8f6a362 SH |
2937 | 0xFF10A01B)) { |
2938 | /* IPv6 address is an SA assigned MGID. */ | |
2939 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
e2e62697 JG |
2940 | } else if ((addr->sa_family == AF_INET6)) { |
2941 | ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); | |
2942 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2943 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
2944 | *mgid = *(union ib_gid *) (mc_map + 4); | |
c8f6a362 | 2945 | } else { |
a9e527e3 | 2946 | ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); |
c8f6a362 SH |
2947 | if (id_priv->id.ps == RDMA_PS_UDP) |
2948 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
c8f6a362 SH |
2949 | *mgid = *(union ib_gid *) (mc_map + 4); |
2950 | } | |
2951 | } | |
2952 | ||
2953 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, | |
2954 | struct cma_multicast *mc) | |
2955 | { | |
2956 | struct ib_sa_mcmember_rec rec; | |
2957 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2958 | ib_sa_comp_mask comp_mask; | |
2959 | int ret; | |
2960 | ||
2961 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
2962 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, | |
2963 | &rec.mgid, &rec); | |
2964 | if (ret) | |
2965 | return ret; | |
2966 | ||
3f446754 | 2967 | cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); |
c8f6a362 SH |
2968 | if (id_priv->id.ps == RDMA_PS_UDP) |
2969 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
6f8372b6 | 2970 | rdma_addr_get_sgid(dev_addr, &rec.port_gid); |
c8f6a362 SH |
2971 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
2972 | rec.join_state = 1; | |
2973 | ||
2974 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | | |
2975 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | | |
2976 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | | |
2977 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
2978 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
2979 | ||
84adeee9 YE |
2980 | if (id_priv->id.ps == RDMA_PS_IPOIB) |
2981 | comp_mask |= IB_SA_MCMEMBER_REC_RATE | | |
2982 | IB_SA_MCMEMBER_REC_RATE_SELECTOR; | |
2983 | ||
c8f6a362 SH |
2984 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, |
2985 | id_priv->id.port_num, &rec, | |
2986 | comp_mask, GFP_KERNEL, | |
2987 | cma_ib_mc_handler, mc); | |
2988 | if (IS_ERR(mc->multicast.ib)) | |
2989 | return PTR_ERR(mc->multicast.ib); | |
2990 | ||
2991 | return 0; | |
2992 | } | |
2993 | ||
3c86aa70 EC |
2994 | static void iboe_mcast_work_handler(struct work_struct *work) |
2995 | { | |
2996 | struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); | |
2997 | struct cma_multicast *mc = mw->mc; | |
2998 | struct ib_sa_multicast *m = mc->multicast.ib; | |
2999 | ||
3000 | mc->multicast.ib->context = mc; | |
3001 | cma_ib_mc_handler(0, m); | |
3002 | kref_put(&mc->mcref, release_mc); | |
3003 | kfree(mw); | |
3004 | } | |
3005 | ||
3006 | static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) | |
3007 | { | |
3008 | struct sockaddr_in *sin = (struct sockaddr_in *)addr; | |
3009 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; | |
3010 | ||
3011 | if (cma_any_addr(addr)) { | |
3012 | memset(mgid, 0, sizeof *mgid); | |
3013 | } else if (addr->sa_family == AF_INET6) { | |
3014 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
3015 | } else { | |
3016 | mgid->raw[0] = 0xff; | |
3017 | mgid->raw[1] = 0x0e; | |
3018 | mgid->raw[2] = 0; | |
3019 | mgid->raw[3] = 0; | |
3020 | mgid->raw[4] = 0; | |
3021 | mgid->raw[5] = 0; | |
3022 | mgid->raw[6] = 0; | |
3023 | mgid->raw[7] = 0; | |
3024 | mgid->raw[8] = 0; | |
3025 | mgid->raw[9] = 0; | |
3026 | mgid->raw[10] = 0xff; | |
3027 | mgid->raw[11] = 0xff; | |
3028 | *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, | |
3033 | struct cma_multicast *mc) | |
3034 | { | |
3035 | struct iboe_mcast_work *work; | |
3036 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
3037 | int err; | |
3038 | struct sockaddr *addr = (struct sockaddr *)&mc->addr; | |
3039 | struct net_device *ndev = NULL; | |
3040 | ||
3041 | if (cma_zero_addr((struct sockaddr *)&mc->addr)) | |
3042 | return -EINVAL; | |
3043 | ||
3044 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
3045 | if (!work) | |
3046 | return -ENOMEM; | |
3047 | ||
3048 | mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); | |
3049 | if (!mc->multicast.ib) { | |
3050 | err = -ENOMEM; | |
3051 | goto out1; | |
3052 | } | |
3053 | ||
3054 | cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); | |
3055 | ||
3056 | mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); | |
3057 | if (id_priv->id.ps == RDMA_PS_UDP) | |
3058 | mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
3059 | ||
3060 | if (dev_addr->bound_dev_if) | |
3061 | ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); | |
3062 | if (!ndev) { | |
3063 | err = -ENODEV; | |
3064 | goto out2; | |
3065 | } | |
3066 | mc->multicast.ib->rec.rate = iboe_get_rate(ndev); | |
3067 | mc->multicast.ib->rec.hop_limit = 1; | |
3068 | mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); | |
3069 | dev_put(ndev); | |
3070 | if (!mc->multicast.ib->rec.mtu) { | |
3071 | err = -EINVAL; | |
3072 | goto out2; | |
3073 | } | |
3074 | iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); | |
3075 | work->id = id_priv; | |
3076 | work->mc = mc; | |
3077 | INIT_WORK(&work->work, iboe_mcast_work_handler); | |
3078 | kref_get(&mc->mcref); | |
3079 | queue_work(cma_wq, &work->work); | |
3080 | ||
3081 | return 0; | |
3082 | ||
3083 | out2: | |
3084 | kfree(mc->multicast.ib); | |
3085 | out1: | |
3086 | kfree(work); | |
3087 | return err; | |
3088 | } | |
3089 | ||
c8f6a362 SH |
3090 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, |
3091 | void *context) | |
3092 | { | |
3093 | struct rdma_id_private *id_priv; | |
3094 | struct cma_multicast *mc; | |
3095 | int ret; | |
3096 | ||
3097 | id_priv = container_of(id, struct rdma_id_private, id); | |
3098 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && | |
3099 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) | |
3100 | return -EINVAL; | |
3101 | ||
3102 | mc = kmalloc(sizeof *mc, GFP_KERNEL); | |
3103 | if (!mc) | |
3104 | return -ENOMEM; | |
3105 | ||
3106 | memcpy(&mc->addr, addr, ip_addr_size(addr)); | |
3107 | mc->context = context; | |
3108 | mc->id_priv = id_priv; | |
3109 | ||
3110 | spin_lock(&id_priv->lock); | |
3111 | list_add(&mc->list, &id_priv->mc_list); | |
3112 | spin_unlock(&id_priv->lock); | |
3113 | ||
3114 | switch (rdma_node_get_transport(id->device->node_type)) { | |
3115 | case RDMA_TRANSPORT_IB: | |
3c86aa70 EC |
3116 | switch (rdma_port_get_link_layer(id->device, id->port_num)) { |
3117 | case IB_LINK_LAYER_INFINIBAND: | |
3118 | ret = cma_join_ib_multicast(id_priv, mc); | |
3119 | break; | |
3120 | case IB_LINK_LAYER_ETHERNET: | |
3121 | kref_init(&mc->mcref); | |
3122 | ret = cma_iboe_join_multicast(id_priv, mc); | |
3123 | break; | |
3124 | default: | |
3125 | ret = -EINVAL; | |
3126 | } | |
c8f6a362 SH |
3127 | break; |
3128 | default: | |
3129 | ret = -ENOSYS; | |
3130 | break; | |
3131 | } | |
3132 | ||
3133 | if (ret) { | |
3134 | spin_lock_irq(&id_priv->lock); | |
3135 | list_del(&mc->list); | |
3136 | spin_unlock_irq(&id_priv->lock); | |
3137 | kfree(mc); | |
3138 | } | |
3139 | return ret; | |
3140 | } | |
3141 | EXPORT_SYMBOL(rdma_join_multicast); | |
3142 | ||
3143 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) | |
3144 | { | |
3145 | struct rdma_id_private *id_priv; | |
3146 | struct cma_multicast *mc; | |
3147 | ||
3148 | id_priv = container_of(id, struct rdma_id_private, id); | |
3149 | spin_lock_irq(&id_priv->lock); | |
3150 | list_for_each_entry(mc, &id_priv->mc_list, list) { | |
3151 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { | |
3152 | list_del(&mc->list); | |
3153 | spin_unlock_irq(&id_priv->lock); | |
3154 | ||
3155 | if (id->qp) | |
3156 | ib_detach_mcast(id->qp, | |
3157 | &mc->multicast.ib->rec.mgid, | |
3158 | mc->multicast.ib->rec.mlid); | |
3c86aa70 EC |
3159 | if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { |
3160 | switch (rdma_port_get_link_layer(id->device, id->port_num)) { | |
3161 | case IB_LINK_LAYER_INFINIBAND: | |
3162 | ib_sa_free_multicast(mc->multicast.ib); | |
3163 | kfree(mc); | |
3164 | break; | |
3165 | case IB_LINK_LAYER_ETHERNET: | |
3166 | kref_put(&mc->mcref, release_mc); | |
3167 | break; | |
3168 | default: | |
3169 | break; | |
3170 | } | |
3171 | } | |
c8f6a362 SH |
3172 | return; |
3173 | } | |
3174 | } | |
3175 | spin_unlock_irq(&id_priv->lock); | |
3176 | } | |
3177 | EXPORT_SYMBOL(rdma_leave_multicast); | |
3178 | ||
dd5bdff8 OG |
3179 | static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) |
3180 | { | |
3181 | struct rdma_dev_addr *dev_addr; | |
3182 | struct cma_ndev_work *work; | |
3183 | ||
3184 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
3185 | ||
6266ed6e | 3186 | if ((dev_addr->bound_dev_if == ndev->ifindex) && |
dd5bdff8 OG |
3187 | memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { |
3188 | printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", | |
3189 | ndev->name, &id_priv->id); | |
3190 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
3191 | if (!work) | |
3192 | return -ENOMEM; | |
3193 | ||
3194 | INIT_WORK(&work->work, cma_ndev_work_handler); | |
3195 | work->id = id_priv; | |
3196 | work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; | |
3197 | atomic_inc(&id_priv->refcount); | |
3198 | queue_work(cma_wq, &work->work); | |
3199 | } | |
3200 | ||
3201 | return 0; | |
3202 | } | |
3203 | ||
3204 | static int cma_netdev_callback(struct notifier_block *self, unsigned long event, | |
3205 | void *ctx) | |
3206 | { | |
3207 | struct net_device *ndev = (struct net_device *)ctx; | |
3208 | struct cma_device *cma_dev; | |
3209 | struct rdma_id_private *id_priv; | |
3210 | int ret = NOTIFY_DONE; | |
3211 | ||
3212 | if (dev_net(ndev) != &init_net) | |
3213 | return NOTIFY_DONE; | |
3214 | ||
3215 | if (event != NETDEV_BONDING_FAILOVER) | |
3216 | return NOTIFY_DONE; | |
3217 | ||
3218 | if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) | |
3219 | return NOTIFY_DONE; | |
3220 | ||
3221 | mutex_lock(&lock); | |
3222 | list_for_each_entry(cma_dev, &dev_list, list) | |
3223 | list_for_each_entry(id_priv, &cma_dev->id_list, list) { | |
3224 | ret = cma_netdev_change(ndev, id_priv); | |
3225 | if (ret) | |
3226 | goto out; | |
3227 | } | |
3228 | ||
3229 | out: | |
3230 | mutex_unlock(&lock); | |
3231 | return ret; | |
3232 | } | |
3233 | ||
3234 | static struct notifier_block cma_nb = { | |
3235 | .notifier_call = cma_netdev_callback | |
3236 | }; | |
3237 | ||
e51060f0 SH |
3238 | static void cma_add_one(struct ib_device *device) |
3239 | { | |
3240 | struct cma_device *cma_dev; | |
3241 | struct rdma_id_private *id_priv; | |
3242 | ||
3243 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
3244 | if (!cma_dev) | |
3245 | return; | |
3246 | ||
3247 | cma_dev->device = device; | |
e51060f0 SH |
3248 | |
3249 | init_completion(&cma_dev->comp); | |
3250 | atomic_set(&cma_dev->refcount, 1); | |
3251 | INIT_LIST_HEAD(&cma_dev->id_list); | |
3252 | ib_set_client_data(device, &cma_client, cma_dev); | |
3253 | ||
3254 | mutex_lock(&lock); | |
3255 | list_add_tail(&cma_dev->list, &dev_list); | |
3256 | list_for_each_entry(id_priv, &listen_any_list, list) | |
3257 | cma_listen_on_dev(id_priv, cma_dev); | |
3258 | mutex_unlock(&lock); | |
e51060f0 SH |
3259 | } |
3260 | ||
3261 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
3262 | { | |
a1b1b61f | 3263 | struct rdma_cm_event event; |
e51060f0 | 3264 | enum cma_state state; |
de910bd9 | 3265 | int ret = 0; |
e51060f0 SH |
3266 | |
3267 | /* Record that we want to remove the device */ | |
3268 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
3269 | if (state == CMA_DESTROYING) | |
3270 | return 0; | |
3271 | ||
3272 | cma_cancel_operation(id_priv, state); | |
de910bd9 | 3273 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
3274 | |
3275 | /* Check for destruction from another callback. */ | |
3276 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
de910bd9 | 3277 | goto out; |
e51060f0 | 3278 | |
a1b1b61f SH |
3279 | memset(&event, 0, sizeof event); |
3280 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
de910bd9 OG |
3281 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
3282 | out: | |
3283 | mutex_unlock(&id_priv->handler_mutex); | |
3284 | return ret; | |
e51060f0 SH |
3285 | } |
3286 | ||
3287 | static void cma_process_remove(struct cma_device *cma_dev) | |
3288 | { | |
e51060f0 SH |
3289 | struct rdma_id_private *id_priv; |
3290 | int ret; | |
3291 | ||
e51060f0 SH |
3292 | mutex_lock(&lock); |
3293 | while (!list_empty(&cma_dev->id_list)) { | |
3294 | id_priv = list_entry(cma_dev->id_list.next, | |
3295 | struct rdma_id_private, list); | |
3296 | ||
d02d1f53 | 3297 | list_del(&id_priv->listen_list); |
94de178a | 3298 | list_del_init(&id_priv->list); |
e51060f0 SH |
3299 | atomic_inc(&id_priv->refcount); |
3300 | mutex_unlock(&lock); | |
3301 | ||
d02d1f53 | 3302 | ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); |
e51060f0 SH |
3303 | cma_deref_id(id_priv); |
3304 | if (ret) | |
3305 | rdma_destroy_id(&id_priv->id); | |
3306 | ||
3307 | mutex_lock(&lock); | |
3308 | } | |
3309 | mutex_unlock(&lock); | |
3310 | ||
3311 | cma_deref_dev(cma_dev); | |
3312 | wait_for_completion(&cma_dev->comp); | |
3313 | } | |
3314 | ||
3315 | static void cma_remove_one(struct ib_device *device) | |
3316 | { | |
3317 | struct cma_device *cma_dev; | |
3318 | ||
3319 | cma_dev = ib_get_client_data(device, &cma_client); | |
3320 | if (!cma_dev) | |
3321 | return; | |
3322 | ||
3323 | mutex_lock(&lock); | |
3324 | list_del(&cma_dev->list); | |
3325 | mutex_unlock(&lock); | |
3326 | ||
3327 | cma_process_remove(cma_dev); | |
3328 | kfree(cma_dev); | |
3329 | } | |
3330 | ||
716abb1f | 3331 | static int __init cma_init(void) |
e51060f0 | 3332 | { |
5d7220e8 | 3333 | int ret; |
227b60f5 | 3334 | |
c7f743a6 | 3335 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
3336 | if (!cma_wq) |
3337 | return -ENOMEM; | |
3338 | ||
c1a0b23b | 3339 | ib_sa_register_client(&sa_client); |
7a118df3 | 3340 | rdma_addr_register_client(&addr_client); |
dd5bdff8 | 3341 | register_netdevice_notifier(&cma_nb); |
c1a0b23b | 3342 | |
e51060f0 SH |
3343 | ret = ib_register_client(&cma_client); |
3344 | if (ret) | |
3345 | goto err; | |
3346 | return 0; | |
3347 | ||
3348 | err: | |
dd5bdff8 | 3349 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3350 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3351 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3352 | destroy_workqueue(cma_wq); |
3353 | return ret; | |
3354 | } | |
3355 | ||
716abb1f | 3356 | static void __exit cma_cleanup(void) |
e51060f0 SH |
3357 | { |
3358 | ib_unregister_client(&cma_client); | |
dd5bdff8 | 3359 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3360 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3361 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3362 | destroy_workqueue(cma_wq); |
3363 | idr_destroy(&sdp_ps); | |
3364 | idr_destroy(&tcp_ps); | |
628e5f6d | 3365 | idr_destroy(&udp_ps); |
c8f6a362 | 3366 | idr_destroy(&ipoib_ps); |
e51060f0 SH |
3367 | } |
3368 | ||
3369 | module_init(cma_init); | |
3370 | module_exit(cma_cleanup); |