Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 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 | * |
| 7 | * This Software is licensed under one of the following licenses: |
| 8 | * |
| 9 | * 1) under the terms of the "Common Public License 1.0" a copy of which is |
| 10 | * available from the Open Source Initiative, see |
| 11 | * http://www.opensource.org/licenses/cpl.php. |
| 12 | * |
| 13 | * 2) under the terms of the "The BSD License" a copy of which is |
| 14 | * available from the Open Source Initiative, see |
| 15 | * http://www.opensource.org/licenses/bsd-license.php. |
| 16 | * |
| 17 | * 3) under the terms of the "GNU General Public License (GPL) Version 2" a |
| 18 | * copy of which is available from the Open Source Initiative, see |
| 19 | * http://www.opensource.org/licenses/gpl-license.php. |
| 20 | * |
| 21 | * Licensee has the right to choose one of the above licenses. |
| 22 | * |
| 23 | * Redistributions of source code must retain the above copyright |
| 24 | * notice and one of the license notices. |
| 25 | * |
| 26 | * Redistributions in binary form must reproduce both the above copyright |
| 27 | * notice, one of the license notices in the documentation |
| 28 | * and/or other materials provided with the distribution. |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include <linux/completion.h> |
| 33 | #include <linux/in.h> |
| 34 | #include <linux/in6.h> |
| 35 | #include <linux/mutex.h> |
| 36 | #include <linux/random.h> |
| 37 | #include <linux/idr.h> |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 38 | #include <linux/inetdevice.h> |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 39 | |
| 40 | #include <net/tcp.h> |
| 41 | |
| 42 | #include <rdma/rdma_cm.h> |
| 43 | #include <rdma/rdma_cm_ib.h> |
| 44 | #include <rdma/ib_cache.h> |
| 45 | #include <rdma/ib_cm.h> |
| 46 | #include <rdma/ib_sa.h> |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 47 | #include <rdma/iw_cm.h> |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 48 | |
| 49 | MODULE_AUTHOR("Sean Hefty"); |
| 50 | MODULE_DESCRIPTION("Generic RDMA CM Agent"); |
| 51 | MODULE_LICENSE("Dual BSD/GPL"); |
| 52 | |
| 53 | #define CMA_CM_RESPONSE_TIMEOUT 20 |
Michael S. Tsirkin | d5bb759 | 2006-09-13 15:01:54 +0300 | [diff] [blame] | 54 | #define CMA_MAX_CM_RETRIES 15 |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 55 | |
| 56 | static void cma_add_one(struct ib_device *device); |
| 57 | static void cma_remove_one(struct ib_device *device); |
| 58 | |
| 59 | static struct ib_client cma_client = { |
| 60 | .name = "cma", |
| 61 | .add = cma_add_one, |
| 62 | .remove = cma_remove_one |
| 63 | }; |
| 64 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 65 | static struct ib_sa_client sa_client; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 66 | static struct rdma_addr_client addr_client; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 67 | static LIST_HEAD(dev_list); |
| 68 | static LIST_HEAD(listen_any_list); |
| 69 | static DEFINE_MUTEX(lock); |
| 70 | static struct workqueue_struct *cma_wq; |
| 71 | static DEFINE_IDR(sdp_ps); |
| 72 | static DEFINE_IDR(tcp_ps); |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 73 | static DEFINE_IDR(udp_ps); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 74 | static DEFINE_IDR(ipoib_ps); |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 75 | static int next_port; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 76 | |
| 77 | struct cma_device { |
| 78 | struct list_head list; |
| 79 | struct ib_device *device; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 80 | struct completion comp; |
| 81 | atomic_t refcount; |
| 82 | struct list_head id_list; |
| 83 | }; |
| 84 | |
| 85 | enum cma_state { |
| 86 | CMA_IDLE, |
| 87 | CMA_ADDR_QUERY, |
| 88 | CMA_ADDR_RESOLVED, |
| 89 | CMA_ROUTE_QUERY, |
| 90 | CMA_ROUTE_RESOLVED, |
| 91 | CMA_CONNECT, |
| 92 | CMA_DISCONNECT, |
| 93 | CMA_ADDR_BOUND, |
| 94 | CMA_LISTEN, |
| 95 | CMA_DEVICE_REMOVAL, |
| 96 | CMA_DESTROYING |
| 97 | }; |
| 98 | |
| 99 | struct rdma_bind_list { |
| 100 | struct idr *ps; |
| 101 | struct hlist_head owners; |
| 102 | unsigned short port; |
| 103 | }; |
| 104 | |
| 105 | /* |
| 106 | * Device removal can occur at anytime, so we need extra handling to |
| 107 | * serialize notifying the user of device removal with other callbacks. |
| 108 | * We do this by disabling removal notification while a callback is in process, |
| 109 | * and reporting it after the callback completes. |
| 110 | */ |
| 111 | struct rdma_id_private { |
| 112 | struct rdma_cm_id id; |
| 113 | |
| 114 | struct rdma_bind_list *bind_list; |
| 115 | struct hlist_node node; |
| 116 | struct list_head list; |
| 117 | struct list_head listen_list; |
| 118 | struct cma_device *cma_dev; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 119 | struct list_head mc_list; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 120 | |
| 121 | enum cma_state state; |
| 122 | spinlock_t lock; |
| 123 | struct completion comp; |
| 124 | atomic_t refcount; |
| 125 | wait_queue_head_t wait_remove; |
| 126 | atomic_t dev_remove; |
| 127 | |
| 128 | int backlog; |
| 129 | int timeout_ms; |
| 130 | struct ib_sa_query *query; |
| 131 | int query_id; |
| 132 | union { |
| 133 | struct ib_cm_id *ib; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 134 | struct iw_cm_id *iw; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 135 | } cm_id; |
| 136 | |
| 137 | u32 seq_num; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 138 | u32 qkey; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 139 | u32 qp_num; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 140 | u8 srq; |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 141 | u8 tos; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 142 | }; |
| 143 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 144 | struct cma_multicast { |
| 145 | struct rdma_id_private *id_priv; |
| 146 | union { |
| 147 | struct ib_sa_multicast *ib; |
| 148 | } multicast; |
| 149 | struct list_head list; |
| 150 | void *context; |
| 151 | struct sockaddr addr; |
| 152 | u8 pad[sizeof(struct sockaddr_in6) - |
| 153 | sizeof(struct sockaddr)]; |
| 154 | }; |
| 155 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 156 | struct cma_work { |
| 157 | struct work_struct work; |
| 158 | struct rdma_id_private *id; |
| 159 | enum cma_state old_state; |
| 160 | enum cma_state new_state; |
| 161 | struct rdma_cm_event event; |
| 162 | }; |
| 163 | |
| 164 | union cma_ip_addr { |
| 165 | struct in6_addr ip6; |
| 166 | struct { |
| 167 | __u32 pad[3]; |
| 168 | __u32 addr; |
| 169 | } ip4; |
| 170 | }; |
| 171 | |
| 172 | struct cma_hdr { |
| 173 | u8 cma_version; |
| 174 | u8 ip_version; /* IP version: 7:4 */ |
| 175 | __u16 port; |
| 176 | union cma_ip_addr src_addr; |
| 177 | union cma_ip_addr dst_addr; |
| 178 | }; |
| 179 | |
| 180 | struct sdp_hh { |
| 181 | u8 bsdh[16]; |
| 182 | u8 sdp_version; /* Major version: 7:4 */ |
| 183 | u8 ip_version; /* IP version: 7:4 */ |
| 184 | u8 sdp_specific1[10]; |
| 185 | __u16 port; |
| 186 | __u16 sdp_specific2; |
| 187 | union cma_ip_addr src_addr; |
| 188 | union cma_ip_addr dst_addr; |
| 189 | }; |
| 190 | |
| 191 | struct sdp_hah { |
| 192 | u8 bsdh[16]; |
| 193 | u8 sdp_version; |
| 194 | }; |
| 195 | |
| 196 | #define CMA_VERSION 0x00 |
| 197 | #define SDP_MAJ_VERSION 0x2 |
| 198 | |
| 199 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) |
| 200 | { |
| 201 | unsigned long flags; |
| 202 | int ret; |
| 203 | |
| 204 | spin_lock_irqsave(&id_priv->lock, flags); |
| 205 | ret = (id_priv->state == comp); |
| 206 | spin_unlock_irqrestore(&id_priv->lock, flags); |
| 207 | return ret; |
| 208 | } |
| 209 | |
| 210 | static int cma_comp_exch(struct rdma_id_private *id_priv, |
| 211 | enum cma_state comp, enum cma_state exch) |
| 212 | { |
| 213 | unsigned long flags; |
| 214 | int ret; |
| 215 | |
| 216 | spin_lock_irqsave(&id_priv->lock, flags); |
| 217 | if ((ret = (id_priv->state == comp))) |
| 218 | id_priv->state = exch; |
| 219 | spin_unlock_irqrestore(&id_priv->lock, flags); |
| 220 | return ret; |
| 221 | } |
| 222 | |
| 223 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, |
| 224 | enum cma_state exch) |
| 225 | { |
| 226 | unsigned long flags; |
| 227 | enum cma_state old; |
| 228 | |
| 229 | spin_lock_irqsave(&id_priv->lock, flags); |
| 230 | old = id_priv->state; |
| 231 | id_priv->state = exch; |
| 232 | spin_unlock_irqrestore(&id_priv->lock, flags); |
| 233 | return old; |
| 234 | } |
| 235 | |
| 236 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) |
| 237 | { |
| 238 | return hdr->ip_version >> 4; |
| 239 | } |
| 240 | |
| 241 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) |
| 242 | { |
| 243 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); |
| 244 | } |
| 245 | |
| 246 | static inline u8 sdp_get_majv(u8 sdp_version) |
| 247 | { |
| 248 | return sdp_version >> 4; |
| 249 | } |
| 250 | |
| 251 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) |
| 252 | { |
| 253 | return hh->ip_version >> 4; |
| 254 | } |
| 255 | |
| 256 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) |
| 257 | { |
| 258 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); |
| 259 | } |
| 260 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 261 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
| 262 | { |
| 263 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); |
| 264 | } |
| 265 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 266 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
| 267 | struct cma_device *cma_dev) |
| 268 | { |
| 269 | atomic_inc(&cma_dev->refcount); |
| 270 | id_priv->cma_dev = cma_dev; |
| 271 | id_priv->id.device = cma_dev->device; |
| 272 | list_add_tail(&id_priv->list, &cma_dev->id_list); |
| 273 | } |
| 274 | |
| 275 | static inline void cma_deref_dev(struct cma_device *cma_dev) |
| 276 | { |
| 277 | if (atomic_dec_and_test(&cma_dev->refcount)) |
| 278 | complete(&cma_dev->comp); |
| 279 | } |
| 280 | |
| 281 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) |
| 282 | { |
| 283 | list_del(&id_priv->list); |
| 284 | cma_deref_dev(id_priv->cma_dev); |
| 285 | id_priv->cma_dev = NULL; |
| 286 | } |
| 287 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 288 | static int cma_set_qkey(struct ib_device *device, u8 port_num, |
| 289 | enum rdma_port_space ps, |
| 290 | struct rdma_dev_addr *dev_addr, u32 *qkey) |
| 291 | { |
| 292 | struct ib_sa_mcmember_rec rec; |
| 293 | int ret = 0; |
| 294 | |
| 295 | switch (ps) { |
| 296 | case RDMA_PS_UDP: |
| 297 | *qkey = RDMA_UDP_QKEY; |
| 298 | break; |
| 299 | case RDMA_PS_IPOIB: |
| 300 | ib_addr_get_mgid(dev_addr, &rec.mgid); |
| 301 | ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec); |
| 302 | *qkey = be32_to_cpu(rec.qkey); |
| 303 | break; |
| 304 | default: |
| 305 | break; |
| 306 | } |
| 307 | return ret; |
| 308 | } |
| 309 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 310 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 311 | { |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 312 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 313 | struct cma_device *cma_dev; |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 314 | union ib_gid gid; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 315 | int ret = -ENODEV; |
| 316 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 317 | switch (rdma_node_get_transport(dev_addr->dev_type)) { |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 318 | case RDMA_TRANSPORT_IB: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 319 | ib_addr_get_sgid(dev_addr, &gid); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 320 | break; |
| 321 | case RDMA_TRANSPORT_IWARP: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 322 | iw_addr_get_sgid(dev_addr, &gid); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 323 | break; |
| 324 | default: |
| 325 | return -ENODEV; |
| 326 | } |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 327 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 328 | list_for_each_entry(cma_dev, &dev_list, list) { |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 329 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 330 | &id_priv->id.port_num, NULL); |
| 331 | if (!ret) { |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 332 | ret = cma_set_qkey(cma_dev->device, |
| 333 | id_priv->id.port_num, |
| 334 | id_priv->id.ps, dev_addr, |
| 335 | &id_priv->qkey); |
| 336 | if (!ret) |
| 337 | cma_attach_to_dev(id_priv, cma_dev); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 338 | break; |
| 339 | } |
| 340 | } |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 341 | return ret; |
| 342 | } |
| 343 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 344 | static void cma_deref_id(struct rdma_id_private *id_priv) |
| 345 | { |
| 346 | if (atomic_dec_and_test(&id_priv->refcount)) |
| 347 | complete(&id_priv->comp); |
| 348 | } |
| 349 | |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 350 | static int cma_disable_remove(struct rdma_id_private *id_priv, |
| 351 | enum cma_state state) |
| 352 | { |
| 353 | unsigned long flags; |
| 354 | int ret; |
| 355 | |
| 356 | spin_lock_irqsave(&id_priv->lock, flags); |
| 357 | if (id_priv->state == state) { |
| 358 | atomic_inc(&id_priv->dev_remove); |
| 359 | ret = 0; |
| 360 | } else |
| 361 | ret = -EINVAL; |
| 362 | spin_unlock_irqrestore(&id_priv->lock, flags); |
| 363 | return ret; |
| 364 | } |
| 365 | |
| 366 | static void cma_enable_remove(struct rdma_id_private *id_priv) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 367 | { |
| 368 | if (atomic_dec_and_test(&id_priv->dev_remove)) |
| 369 | wake_up(&id_priv->wait_remove); |
| 370 | } |
| 371 | |
Sean Hefty | 6c719f5 | 2007-05-07 11:49:27 -0700 | [diff] [blame] | 372 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
| 373 | { |
| 374 | return (id_priv->id.device && id_priv->cm_id.ib); |
| 375 | } |
| 376 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 377 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
| 378 | void *context, enum rdma_port_space ps) |
| 379 | { |
| 380 | struct rdma_id_private *id_priv; |
| 381 | |
| 382 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); |
| 383 | if (!id_priv) |
| 384 | return ERR_PTR(-ENOMEM); |
| 385 | |
| 386 | id_priv->state = CMA_IDLE; |
| 387 | id_priv->id.context = context; |
| 388 | id_priv->id.event_handler = event_handler; |
| 389 | id_priv->id.ps = ps; |
| 390 | spin_lock_init(&id_priv->lock); |
| 391 | init_completion(&id_priv->comp); |
| 392 | atomic_set(&id_priv->refcount, 1); |
| 393 | init_waitqueue_head(&id_priv->wait_remove); |
| 394 | atomic_set(&id_priv->dev_remove, 0); |
| 395 | INIT_LIST_HEAD(&id_priv->listen_list); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 396 | INIT_LIST_HEAD(&id_priv->mc_list); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 397 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
| 398 | |
| 399 | return &id_priv->id; |
| 400 | } |
| 401 | EXPORT_SYMBOL(rdma_create_id); |
| 402 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 403 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 404 | { |
| 405 | struct ib_qp_attr qp_attr; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 406 | int qp_attr_mask, ret; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 407 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 408 | qp_attr.qp_state = IB_QPS_INIT; |
| 409 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 410 | if (ret) |
| 411 | return ret; |
| 412 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 413 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
| 414 | if (ret) |
| 415 | return ret; |
| 416 | |
| 417 | qp_attr.qp_state = IB_QPS_RTR; |
| 418 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); |
| 419 | if (ret) |
| 420 | return ret; |
| 421 | |
| 422 | qp_attr.qp_state = IB_QPS_RTS; |
| 423 | qp_attr.sq_psn = 0; |
| 424 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); |
| 425 | |
| 426 | return ret; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 427 | } |
| 428 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 429 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 430 | { |
| 431 | struct ib_qp_attr qp_attr; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 432 | int qp_attr_mask, ret; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 433 | |
| 434 | qp_attr.qp_state = IB_QPS_INIT; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 435 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
| 436 | if (ret) |
| 437 | return ret; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 438 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 439 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 440 | } |
| 441 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 442 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
| 443 | struct ib_qp_init_attr *qp_init_attr) |
| 444 | { |
| 445 | struct rdma_id_private *id_priv; |
| 446 | struct ib_qp *qp; |
| 447 | int ret; |
| 448 | |
| 449 | id_priv = container_of(id, struct rdma_id_private, id); |
| 450 | if (id->device != pd->device) |
| 451 | return -EINVAL; |
| 452 | |
| 453 | qp = ib_create_qp(pd, qp_init_attr); |
| 454 | if (IS_ERR(qp)) |
| 455 | return PTR_ERR(qp); |
| 456 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 457 | if (cma_is_ud_ps(id_priv->id.ps)) |
| 458 | ret = cma_init_ud_qp(id_priv, qp); |
| 459 | else |
| 460 | ret = cma_init_conn_qp(id_priv, qp); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 461 | if (ret) |
| 462 | goto err; |
| 463 | |
| 464 | id->qp = qp; |
| 465 | id_priv->qp_num = qp->qp_num; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 466 | id_priv->srq = (qp->srq != NULL); |
| 467 | return 0; |
| 468 | err: |
| 469 | ib_destroy_qp(qp); |
| 470 | return ret; |
| 471 | } |
| 472 | EXPORT_SYMBOL(rdma_create_qp); |
| 473 | |
| 474 | void rdma_destroy_qp(struct rdma_cm_id *id) |
| 475 | { |
| 476 | ib_destroy_qp(id->qp); |
| 477 | } |
| 478 | EXPORT_SYMBOL(rdma_destroy_qp); |
| 479 | |
| 480 | static int cma_modify_qp_rtr(struct rdma_cm_id *id) |
| 481 | { |
| 482 | struct ib_qp_attr qp_attr; |
| 483 | int qp_attr_mask, ret; |
| 484 | |
| 485 | if (!id->qp) |
| 486 | return 0; |
| 487 | |
| 488 | /* Need to update QP attributes from default values. */ |
| 489 | qp_attr.qp_state = IB_QPS_INIT; |
| 490 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); |
| 491 | if (ret) |
| 492 | return ret; |
| 493 | |
| 494 | ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); |
| 495 | if (ret) |
| 496 | return ret; |
| 497 | |
| 498 | qp_attr.qp_state = IB_QPS_RTR; |
| 499 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); |
| 500 | if (ret) |
| 501 | return ret; |
| 502 | |
| 503 | return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); |
| 504 | } |
| 505 | |
| 506 | static int cma_modify_qp_rts(struct rdma_cm_id *id) |
| 507 | { |
| 508 | struct ib_qp_attr qp_attr; |
| 509 | int qp_attr_mask, ret; |
| 510 | |
| 511 | if (!id->qp) |
| 512 | return 0; |
| 513 | |
| 514 | qp_attr.qp_state = IB_QPS_RTS; |
| 515 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); |
| 516 | if (ret) |
| 517 | return ret; |
| 518 | |
| 519 | return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); |
| 520 | } |
| 521 | |
| 522 | static int cma_modify_qp_err(struct rdma_cm_id *id) |
| 523 | { |
| 524 | struct ib_qp_attr qp_attr; |
| 525 | |
| 526 | if (!id->qp) |
| 527 | return 0; |
| 528 | |
| 529 | qp_attr.qp_state = IB_QPS_ERR; |
| 530 | return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE); |
| 531 | } |
| 532 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 533 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
| 534 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) |
| 535 | { |
| 536 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
| 537 | int ret; |
| 538 | |
| 539 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, |
| 540 | ib_addr_get_pkey(dev_addr), |
| 541 | &qp_attr->pkey_index); |
| 542 | if (ret) |
| 543 | return ret; |
| 544 | |
| 545 | qp_attr->port_num = id_priv->id.port_num; |
| 546 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; |
| 547 | |
| 548 | if (cma_is_ud_ps(id_priv->id.ps)) { |
| 549 | qp_attr->qkey = id_priv->qkey; |
| 550 | *qp_attr_mask |= IB_QP_QKEY; |
| 551 | } else { |
| 552 | qp_attr->qp_access_flags = 0; |
| 553 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; |
| 554 | } |
| 555 | return 0; |
| 556 | } |
| 557 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 558 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
| 559 | int *qp_attr_mask) |
| 560 | { |
| 561 | struct rdma_id_private *id_priv; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 562 | int ret = 0; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 563 | |
| 564 | id_priv = container_of(id, struct rdma_id_private, id); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 565 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
| 566 | case RDMA_TRANSPORT_IB: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 567 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
| 568 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); |
| 569 | else |
| 570 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, |
| 571 | qp_attr_mask); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 572 | if (qp_attr->qp_state == IB_QPS_RTR) |
| 573 | qp_attr->rq_psn = id_priv->seq_num; |
| 574 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 575 | case RDMA_TRANSPORT_IWARP: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 576 | if (!id_priv->cm_id.iw) { |
Dotan Barak | 8f07653 | 2007-07-17 17:58:57 +0300 | [diff] [blame] | 577 | qp_attr->qp_access_flags = 0; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 578 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
| 579 | } else |
| 580 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, |
| 581 | qp_attr_mask); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 582 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 583 | default: |
| 584 | ret = -ENOSYS; |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | return ret; |
| 589 | } |
| 590 | EXPORT_SYMBOL(rdma_init_qp_attr); |
| 591 | |
| 592 | static inline int cma_zero_addr(struct sockaddr *addr) |
| 593 | { |
| 594 | struct in6_addr *ip6; |
| 595 | |
| 596 | if (addr->sa_family == AF_INET) |
| 597 | return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr); |
| 598 | else { |
| 599 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; |
| 600 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | |
Eric Sesterhenn | 5fd571c | 2006-06-21 20:56:26 +0200 | [diff] [blame] | 601 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 602 | } |
| 603 | } |
| 604 | |
| 605 | static inline int cma_loopback_addr(struct sockaddr *addr) |
| 606 | { |
| 607 | return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr); |
| 608 | } |
| 609 | |
| 610 | static inline int cma_any_addr(struct sockaddr *addr) |
| 611 | { |
| 612 | return cma_zero_addr(addr) || cma_loopback_addr(addr); |
| 613 | } |
| 614 | |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 615 | static inline __be16 cma_port(struct sockaddr *addr) |
| 616 | { |
| 617 | if (addr->sa_family == AF_INET) |
| 618 | return ((struct sockaddr_in *) addr)->sin_port; |
| 619 | else |
| 620 | return ((struct sockaddr_in6 *) addr)->sin6_port; |
| 621 | } |
| 622 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 623 | static inline int cma_any_port(struct sockaddr *addr) |
| 624 | { |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 625 | return !cma_port(addr); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, |
| 629 | u8 *ip_ver, __u16 *port, |
| 630 | union cma_ip_addr **src, union cma_ip_addr **dst) |
| 631 | { |
| 632 | switch (ps) { |
| 633 | case RDMA_PS_SDP: |
| 634 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != |
| 635 | SDP_MAJ_VERSION) |
| 636 | return -EINVAL; |
| 637 | |
| 638 | *ip_ver = sdp_get_ip_ver(hdr); |
| 639 | *port = ((struct sdp_hh *) hdr)->port; |
| 640 | *src = &((struct sdp_hh *) hdr)->src_addr; |
| 641 | *dst = &((struct sdp_hh *) hdr)->dst_addr; |
| 642 | break; |
| 643 | default: |
| 644 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) |
| 645 | return -EINVAL; |
| 646 | |
| 647 | *ip_ver = cma_get_ip_ver(hdr); |
| 648 | *port = ((struct cma_hdr *) hdr)->port; |
| 649 | *src = &((struct cma_hdr *) hdr)->src_addr; |
| 650 | *dst = &((struct cma_hdr *) hdr)->dst_addr; |
| 651 | break; |
| 652 | } |
| 653 | |
| 654 | if (*ip_ver != 4 && *ip_ver != 6) |
| 655 | return -EINVAL; |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | static void cma_save_net_info(struct rdma_addr *addr, |
| 660 | struct rdma_addr *listen_addr, |
| 661 | u8 ip_ver, __u16 port, |
| 662 | union cma_ip_addr *src, union cma_ip_addr *dst) |
| 663 | { |
| 664 | struct sockaddr_in *listen4, *ip4; |
| 665 | struct sockaddr_in6 *listen6, *ip6; |
| 666 | |
| 667 | switch (ip_ver) { |
| 668 | case 4: |
| 669 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; |
| 670 | ip4 = (struct sockaddr_in *) &addr->src_addr; |
| 671 | ip4->sin_family = listen4->sin_family; |
| 672 | ip4->sin_addr.s_addr = dst->ip4.addr; |
| 673 | ip4->sin_port = listen4->sin_port; |
| 674 | |
| 675 | ip4 = (struct sockaddr_in *) &addr->dst_addr; |
| 676 | ip4->sin_family = listen4->sin_family; |
| 677 | ip4->sin_addr.s_addr = src->ip4.addr; |
| 678 | ip4->sin_port = port; |
| 679 | break; |
| 680 | case 6: |
| 681 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; |
| 682 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; |
| 683 | ip6->sin6_family = listen6->sin6_family; |
| 684 | ip6->sin6_addr = dst->ip6; |
| 685 | ip6->sin6_port = listen6->sin6_port; |
| 686 | |
| 687 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; |
| 688 | ip6->sin6_family = listen6->sin6_family; |
| 689 | ip6->sin6_addr = src->ip6; |
| 690 | ip6->sin6_port = port; |
| 691 | break; |
| 692 | default: |
| 693 | break; |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | static inline int cma_user_data_offset(enum rdma_port_space ps) |
| 698 | { |
| 699 | switch (ps) { |
| 700 | case RDMA_PS_SDP: |
| 701 | return 0; |
| 702 | default: |
| 703 | return sizeof(struct cma_hdr); |
| 704 | } |
| 705 | } |
| 706 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 707 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
| 708 | { |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 709 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
| 710 | case RDMA_TRANSPORT_IB: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 711 | if (id_priv->query) |
| 712 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); |
| 713 | break; |
| 714 | default: |
| 715 | break; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | static inline int cma_internal_listen(struct rdma_id_private *id_priv) |
| 720 | { |
| 721 | return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev && |
| 722 | cma_any_addr(&id_priv->id.route.addr.src_addr); |
| 723 | } |
| 724 | |
| 725 | static void cma_destroy_listen(struct rdma_id_private *id_priv) |
| 726 | { |
| 727 | cma_exch(id_priv, CMA_DESTROYING); |
| 728 | |
| 729 | if (id_priv->cma_dev) { |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 730 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
| 731 | case RDMA_TRANSPORT_IB: |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 732 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 733 | ib_destroy_cm_id(id_priv->cm_id.ib); |
| 734 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 735 | case RDMA_TRANSPORT_IWARP: |
| 736 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) |
| 737 | iw_destroy_cm_id(id_priv->cm_id.iw); |
| 738 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 739 | default: |
| 740 | break; |
| 741 | } |
| 742 | cma_detach_from_dev(id_priv); |
| 743 | } |
| 744 | list_del(&id_priv->listen_list); |
| 745 | |
| 746 | cma_deref_id(id_priv); |
| 747 | wait_for_completion(&id_priv->comp); |
| 748 | |
| 749 | kfree(id_priv); |
| 750 | } |
| 751 | |
| 752 | static void cma_cancel_listens(struct rdma_id_private *id_priv) |
| 753 | { |
| 754 | struct rdma_id_private *dev_id_priv; |
| 755 | |
| 756 | mutex_lock(&lock); |
| 757 | list_del(&id_priv->list); |
| 758 | |
| 759 | while (!list_empty(&id_priv->listen_list)) { |
| 760 | dev_id_priv = list_entry(id_priv->listen_list.next, |
| 761 | struct rdma_id_private, listen_list); |
| 762 | cma_destroy_listen(dev_id_priv); |
| 763 | } |
| 764 | mutex_unlock(&lock); |
| 765 | } |
| 766 | |
| 767 | static void cma_cancel_operation(struct rdma_id_private *id_priv, |
| 768 | enum cma_state state) |
| 769 | { |
| 770 | switch (state) { |
| 771 | case CMA_ADDR_QUERY: |
| 772 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); |
| 773 | break; |
| 774 | case CMA_ROUTE_QUERY: |
| 775 | cma_cancel_route(id_priv); |
| 776 | break; |
| 777 | case CMA_LISTEN: |
| 778 | if (cma_any_addr(&id_priv->id.route.addr.src_addr) && |
| 779 | !id_priv->cma_dev) |
| 780 | cma_cancel_listens(id_priv); |
| 781 | break; |
| 782 | default: |
| 783 | break; |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | static void cma_release_port(struct rdma_id_private *id_priv) |
| 788 | { |
| 789 | struct rdma_bind_list *bind_list = id_priv->bind_list; |
| 790 | |
| 791 | if (!bind_list) |
| 792 | return; |
| 793 | |
| 794 | mutex_lock(&lock); |
| 795 | hlist_del(&id_priv->node); |
| 796 | if (hlist_empty(&bind_list->owners)) { |
| 797 | idr_remove(bind_list->ps, bind_list->port); |
| 798 | kfree(bind_list); |
| 799 | } |
| 800 | mutex_unlock(&lock); |
| 801 | } |
| 802 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 803 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
| 804 | { |
| 805 | struct cma_multicast *mc; |
| 806 | |
| 807 | while (!list_empty(&id_priv->mc_list)) { |
| 808 | mc = container_of(id_priv->mc_list.next, |
| 809 | struct cma_multicast, list); |
| 810 | list_del(&mc->list); |
| 811 | ib_sa_free_multicast(mc->multicast.ib); |
| 812 | kfree(mc); |
| 813 | } |
| 814 | } |
| 815 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 816 | void rdma_destroy_id(struct rdma_cm_id *id) |
| 817 | { |
| 818 | struct rdma_id_private *id_priv; |
| 819 | enum cma_state state; |
| 820 | |
| 821 | id_priv = container_of(id, struct rdma_id_private, id); |
| 822 | state = cma_exch(id_priv, CMA_DESTROYING); |
| 823 | cma_cancel_operation(id_priv, state); |
| 824 | |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 825 | mutex_lock(&lock); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 826 | if (id_priv->cma_dev) { |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 827 | mutex_unlock(&lock); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 828 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 829 | case RDMA_TRANSPORT_IB: |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 830 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 831 | ib_destroy_cm_id(id_priv->cm_id.ib); |
| 832 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 833 | case RDMA_TRANSPORT_IWARP: |
| 834 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) |
| 835 | iw_destroy_cm_id(id_priv->cm_id.iw); |
| 836 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 837 | default: |
| 838 | break; |
| 839 | } |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 840 | cma_leave_mc_groups(id_priv); |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 841 | mutex_lock(&lock); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 842 | cma_detach_from_dev(id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 843 | } |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 844 | mutex_unlock(&lock); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 845 | |
| 846 | cma_release_port(id_priv); |
| 847 | cma_deref_id(id_priv); |
| 848 | wait_for_completion(&id_priv->comp); |
| 849 | |
| 850 | kfree(id_priv->id.route.path_rec); |
| 851 | kfree(id_priv); |
| 852 | } |
| 853 | EXPORT_SYMBOL(rdma_destroy_id); |
| 854 | |
| 855 | static int cma_rep_recv(struct rdma_id_private *id_priv) |
| 856 | { |
| 857 | int ret; |
| 858 | |
| 859 | ret = cma_modify_qp_rtr(&id_priv->id); |
| 860 | if (ret) |
| 861 | goto reject; |
| 862 | |
| 863 | ret = cma_modify_qp_rts(&id_priv->id); |
| 864 | if (ret) |
| 865 | goto reject; |
| 866 | |
| 867 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); |
| 868 | if (ret) |
| 869 | goto reject; |
| 870 | |
| 871 | return 0; |
| 872 | reject: |
| 873 | cma_modify_qp_err(&id_priv->id); |
| 874 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
| 875 | NULL, 0, NULL, 0); |
| 876 | return ret; |
| 877 | } |
| 878 | |
| 879 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) |
| 880 | { |
| 881 | if (id_priv->id.ps == RDMA_PS_SDP && |
| 882 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != |
| 883 | SDP_MAJ_VERSION) |
| 884 | return -EINVAL; |
| 885 | |
| 886 | return 0; |
| 887 | } |
| 888 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 889 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
| 890 | struct ib_cm_rep_event_param *rep_data, |
| 891 | void *private_data) |
| 892 | { |
| 893 | event->param.conn.private_data = private_data; |
| 894 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; |
| 895 | event->param.conn.responder_resources = rep_data->responder_resources; |
| 896 | event->param.conn.initiator_depth = rep_data->initiator_depth; |
| 897 | event->param.conn.flow_control = rep_data->flow_control; |
| 898 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; |
| 899 | event->param.conn.srq = rep_data->srq; |
| 900 | event->param.conn.qp_num = rep_data->remote_qpn; |
| 901 | } |
| 902 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 903 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
| 904 | { |
| 905 | struct rdma_id_private *id_priv = cm_id->context; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 906 | struct rdma_cm_event event; |
| 907 | int ret = 0; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 908 | |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 909 | if (cma_disable_remove(id_priv, CMA_CONNECT)) |
| 910 | return 0; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 911 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 912 | memset(&event, 0, sizeof event); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 913 | switch (ib_event->event) { |
| 914 | case IB_CM_REQ_ERROR: |
| 915 | case IB_CM_REP_ERROR: |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 916 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
| 917 | event.status = -ETIMEDOUT; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 918 | break; |
| 919 | case IB_CM_REP_RECEIVED: |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 920 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
| 921 | if (event.status) |
| 922 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 923 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 924 | event.status = cma_rep_recv(id_priv); |
| 925 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : |
| 926 | RDMA_CM_EVENT_ESTABLISHED; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 927 | } else |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 928 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
| 929 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, |
| 930 | ib_event->private_data); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 931 | break; |
| 932 | case IB_CM_RTU_RECEIVED: |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 933 | case IB_CM_USER_ESTABLISHED: |
| 934 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 935 | break; |
| 936 | case IB_CM_DREQ_ERROR: |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 937 | event.status = -ETIMEDOUT; /* fall through */ |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 938 | case IB_CM_DREQ_RECEIVED: |
| 939 | case IB_CM_DREP_RECEIVED: |
| 940 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) |
| 941 | goto out; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 942 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 943 | break; |
| 944 | case IB_CM_TIMEWAIT_EXIT: |
| 945 | case IB_CM_MRA_RECEIVED: |
| 946 | /* ignore event */ |
| 947 | goto out; |
| 948 | case IB_CM_REJ_RECEIVED: |
| 949 | cma_modify_qp_err(&id_priv->id); |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 950 | event.status = ib_event->param.rej_rcvd.reason; |
| 951 | event.event = RDMA_CM_EVENT_REJECTED; |
| 952 | event.param.conn.private_data = ib_event->private_data; |
| 953 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 954 | break; |
| 955 | default: |
| 956 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", |
| 957 | ib_event->event); |
| 958 | goto out; |
| 959 | } |
| 960 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 961 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 962 | if (ret) { |
| 963 | /* Destroy the CM ID by returning a non-zero value. */ |
| 964 | id_priv->cm_id.ib = NULL; |
| 965 | cma_exch(id_priv, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 966 | cma_enable_remove(id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 967 | rdma_destroy_id(&id_priv->id); |
| 968 | return ret; |
| 969 | } |
| 970 | out: |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 971 | cma_enable_remove(id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 972 | return ret; |
| 973 | } |
| 974 | |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 975 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
| 976 | struct ib_cm_event *ib_event) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 977 | { |
| 978 | struct rdma_id_private *id_priv; |
| 979 | struct rdma_cm_id *id; |
| 980 | struct rdma_route *rt; |
| 981 | union cma_ip_addr *src, *dst; |
| 982 | __u16 port; |
| 983 | u8 ip_ver; |
| 984 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 985 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
| 986 | &ip_ver, &port, &src, &dst)) |
| 987 | goto err; |
| 988 | |
Krishna Kumar | 3f168d2 | 2006-09-29 12:09:51 -0700 | [diff] [blame] | 989 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
| 990 | listen_id->ps); |
| 991 | if (IS_ERR(id)) |
| 992 | goto err; |
| 993 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 994 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, |
| 995 | ip_ver, port, src, dst); |
Krishna Kumar | 3f168d2 | 2006-09-29 12:09:51 -0700 | [diff] [blame] | 996 | |
| 997 | rt = &id->route; |
| 998 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; |
| 999 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
| 1000 | GFP_KERNEL); |
| 1001 | if (!rt->path_rec) |
| 1002 | goto destroy_id; |
| 1003 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1004 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
| 1005 | if (rt->num_paths == 2) |
| 1006 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; |
| 1007 | |
| 1008 | ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); |
| 1009 | ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); |
| 1010 | ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1011 | rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1012 | |
| 1013 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1014 | id_priv->state = CMA_CONNECT; |
| 1015 | return id_priv; |
Krishna Kumar | 3f168d2 | 2006-09-29 12:09:51 -0700 | [diff] [blame] | 1016 | |
| 1017 | destroy_id: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1018 | rdma_destroy_id(id); |
Krishna Kumar | 3f168d2 | 2006-09-29 12:09:51 -0700 | [diff] [blame] | 1019 | err: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1020 | return NULL; |
| 1021 | } |
| 1022 | |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 1023 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
| 1024 | struct ib_cm_event *ib_event) |
| 1025 | { |
| 1026 | struct rdma_id_private *id_priv; |
| 1027 | struct rdma_cm_id *id; |
| 1028 | union cma_ip_addr *src, *dst; |
| 1029 | __u16 port; |
| 1030 | u8 ip_ver; |
| 1031 | int ret; |
| 1032 | |
| 1033 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
| 1034 | listen_id->ps); |
| 1035 | if (IS_ERR(id)) |
| 1036 | return NULL; |
| 1037 | |
| 1038 | |
| 1039 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
| 1040 | &ip_ver, &port, &src, &dst)) |
| 1041 | goto err; |
| 1042 | |
| 1043 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, |
| 1044 | ip_ver, port, src, dst); |
| 1045 | |
| 1046 | ret = rdma_translate_ip(&id->route.addr.src_addr, |
| 1047 | &id->route.addr.dev_addr); |
| 1048 | if (ret) |
| 1049 | goto err; |
| 1050 | |
| 1051 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1052 | id_priv->state = CMA_CONNECT; |
| 1053 | return id_priv; |
| 1054 | err: |
| 1055 | rdma_destroy_id(id); |
| 1056 | return NULL; |
| 1057 | } |
| 1058 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1059 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
| 1060 | struct ib_cm_req_event_param *req_data, |
| 1061 | void *private_data, int offset) |
| 1062 | { |
| 1063 | event->param.conn.private_data = private_data + offset; |
| 1064 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; |
| 1065 | event->param.conn.responder_resources = req_data->responder_resources; |
| 1066 | event->param.conn.initiator_depth = req_data->initiator_depth; |
| 1067 | event->param.conn.flow_control = req_data->flow_control; |
| 1068 | event->param.conn.retry_count = req_data->retry_count; |
| 1069 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; |
| 1070 | event->param.conn.srq = req_data->srq; |
| 1071 | event->param.conn.qp_num = req_data->remote_qpn; |
| 1072 | } |
| 1073 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1074 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
| 1075 | { |
| 1076 | struct rdma_id_private *listen_id, *conn_id; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1077 | struct rdma_cm_event event; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1078 | int offset, ret; |
| 1079 | |
| 1080 | listen_id = cm_id->context; |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1081 | if (cma_disable_remove(listen_id, CMA_LISTEN)) |
| 1082 | return -ECONNABORTED; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1083 | |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 1084 | memset(&event, 0, sizeof event); |
| 1085 | offset = cma_user_data_offset(listen_id->id.ps); |
| 1086 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1087 | if (cma_is_ud_ps(listen_id->id.ps)) { |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 1088 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
| 1089 | event.param.ud.private_data = ib_event->private_data + offset; |
| 1090 | event.param.ud.private_data_len = |
| 1091 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; |
| 1092 | } else { |
| 1093 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); |
| 1094 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, |
| 1095 | ib_event->private_data, offset); |
| 1096 | } |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1097 | if (!conn_id) { |
| 1098 | ret = -ENOMEM; |
| 1099 | goto out; |
| 1100 | } |
| 1101 | |
| 1102 | atomic_inc(&conn_id->dev_remove); |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1103 | mutex_lock(&lock); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1104 | ret = cma_acquire_dev(conn_id); |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1105 | mutex_unlock(&lock); |
Krishna Kumar | a1a733f | 2006-10-17 10:09:11 +0530 | [diff] [blame] | 1106 | if (ret) |
| 1107 | goto release_conn_id; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1108 | |
| 1109 | conn_id->cm_id.ib = cm_id; |
| 1110 | cm_id->context = conn_id; |
| 1111 | cm_id->cm_handler = cma_ib_handler; |
| 1112 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1113 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
Krishna Kumar | a1a733f | 2006-10-17 10:09:11 +0530 | [diff] [blame] | 1114 | if (!ret) |
| 1115 | goto out; |
| 1116 | |
| 1117 | /* Destroy the CM ID by returning a non-zero value. */ |
| 1118 | conn_id->cm_id.ib = NULL; |
| 1119 | |
| 1120 | release_conn_id: |
| 1121 | cma_exch(conn_id, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1122 | cma_enable_remove(conn_id); |
Krishna Kumar | a1a733f | 2006-10-17 10:09:11 +0530 | [diff] [blame] | 1123 | rdma_destroy_id(&conn_id->id); |
| 1124 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1125 | out: |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1126 | cma_enable_remove(listen_id); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1127 | return ret; |
| 1128 | } |
| 1129 | |
| 1130 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) |
| 1131 | { |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 1132 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, |
| 1136 | struct ib_cm_compare_data *compare) |
| 1137 | { |
| 1138 | struct cma_hdr *cma_data, *cma_mask; |
| 1139 | struct sdp_hh *sdp_data, *sdp_mask; |
| 1140 | __u32 ip4_addr; |
| 1141 | struct in6_addr ip6_addr; |
| 1142 | |
| 1143 | memset(compare, 0, sizeof *compare); |
| 1144 | cma_data = (void *) compare->data; |
| 1145 | cma_mask = (void *) compare->mask; |
| 1146 | sdp_data = (void *) compare->data; |
| 1147 | sdp_mask = (void *) compare->mask; |
| 1148 | |
| 1149 | switch (addr->sa_family) { |
| 1150 | case AF_INET: |
| 1151 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; |
| 1152 | if (ps == RDMA_PS_SDP) { |
| 1153 | sdp_set_ip_ver(sdp_data, 4); |
| 1154 | sdp_set_ip_ver(sdp_mask, 0xF); |
| 1155 | sdp_data->dst_addr.ip4.addr = ip4_addr; |
| 1156 | sdp_mask->dst_addr.ip4.addr = ~0; |
| 1157 | } else { |
| 1158 | cma_set_ip_ver(cma_data, 4); |
| 1159 | cma_set_ip_ver(cma_mask, 0xF); |
| 1160 | cma_data->dst_addr.ip4.addr = ip4_addr; |
| 1161 | cma_mask->dst_addr.ip4.addr = ~0; |
| 1162 | } |
| 1163 | break; |
| 1164 | case AF_INET6: |
| 1165 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; |
| 1166 | if (ps == RDMA_PS_SDP) { |
| 1167 | sdp_set_ip_ver(sdp_data, 6); |
| 1168 | sdp_set_ip_ver(sdp_mask, 0xF); |
| 1169 | sdp_data->dst_addr.ip6 = ip6_addr; |
| 1170 | memset(&sdp_mask->dst_addr.ip6, 0xFF, |
| 1171 | sizeof sdp_mask->dst_addr.ip6); |
| 1172 | } else { |
| 1173 | cma_set_ip_ver(cma_data, 6); |
| 1174 | cma_set_ip_ver(cma_mask, 0xF); |
| 1175 | cma_data->dst_addr.ip6 = ip6_addr; |
| 1176 | memset(&cma_mask->dst_addr.ip6, 0xFF, |
| 1177 | sizeof cma_mask->dst_addr.ip6); |
| 1178 | } |
| 1179 | break; |
| 1180 | default: |
| 1181 | break; |
| 1182 | } |
| 1183 | } |
| 1184 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1185 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
| 1186 | { |
| 1187 | struct rdma_id_private *id_priv = iw_id->context; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1188 | struct rdma_cm_event event; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1189 | struct sockaddr_in *sin; |
| 1190 | int ret = 0; |
| 1191 | |
Sean Hefty | be65f08 | 2007-05-07 11:49:12 -0700 | [diff] [blame] | 1192 | if (cma_disable_remove(id_priv, CMA_CONNECT)) |
| 1193 | return 0; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1194 | |
Sean Hefty | be65f08 | 2007-05-07 11:49:12 -0700 | [diff] [blame] | 1195 | memset(&event, 0, sizeof event); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1196 | switch (iw_event->event) { |
| 1197 | case IW_CM_EVENT_CLOSE: |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1198 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1199 | break; |
| 1200 | case IW_CM_EVENT_CONNECT_REPLY: |
| 1201 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| 1202 | *sin = iw_event->local_addr; |
| 1203 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; |
| 1204 | *sin = iw_event->remote_addr; |
Steve Wise | 881a045 | 2006-12-15 16:50:17 -0600 | [diff] [blame] | 1205 | switch (iw_event->status) { |
| 1206 | case 0: |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1207 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
Steve Wise | 881a045 | 2006-12-15 16:50:17 -0600 | [diff] [blame] | 1208 | break; |
| 1209 | case -ECONNRESET: |
| 1210 | case -ECONNREFUSED: |
| 1211 | event.event = RDMA_CM_EVENT_REJECTED; |
| 1212 | break; |
| 1213 | case -ETIMEDOUT: |
| 1214 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
| 1215 | break; |
| 1216 | default: |
| 1217 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; |
| 1218 | break; |
| 1219 | } |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1220 | break; |
| 1221 | case IW_CM_EVENT_ESTABLISHED: |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1222 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1223 | break; |
| 1224 | default: |
| 1225 | BUG_ON(1); |
| 1226 | } |
| 1227 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1228 | event.status = iw_event->status; |
| 1229 | event.param.conn.private_data = iw_event->private_data; |
| 1230 | event.param.conn.private_data_len = iw_event->private_data_len; |
| 1231 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1232 | if (ret) { |
| 1233 | /* Destroy the CM ID by returning a non-zero value. */ |
| 1234 | id_priv->cm_id.iw = NULL; |
| 1235 | cma_exch(id_priv, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1236 | cma_enable_remove(id_priv); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1237 | rdma_destroy_id(&id_priv->id); |
| 1238 | return ret; |
| 1239 | } |
| 1240 | |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1241 | cma_enable_remove(id_priv); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1242 | return ret; |
| 1243 | } |
| 1244 | |
| 1245 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, |
| 1246 | struct iw_cm_event *iw_event) |
| 1247 | { |
| 1248 | struct rdma_cm_id *new_cm_id; |
| 1249 | struct rdma_id_private *listen_id, *conn_id; |
| 1250 | struct sockaddr_in *sin; |
| 1251 | struct net_device *dev = NULL; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1252 | struct rdma_cm_event event; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1253 | int ret; |
| 1254 | |
| 1255 | listen_id = cm_id->context; |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1256 | if (cma_disable_remove(listen_id, CMA_LISTEN)) |
| 1257 | return -ECONNABORTED; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1258 | |
| 1259 | /* Create a new RDMA id for the new IW CM ID */ |
| 1260 | new_cm_id = rdma_create_id(listen_id->id.event_handler, |
| 1261 | listen_id->id.context, |
| 1262 | RDMA_PS_TCP); |
| 1263 | if (!new_cm_id) { |
| 1264 | ret = -ENOMEM; |
| 1265 | goto out; |
| 1266 | } |
| 1267 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); |
| 1268 | atomic_inc(&conn_id->dev_remove); |
| 1269 | conn_id->state = CMA_CONNECT; |
| 1270 | |
| 1271 | dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr); |
| 1272 | if (!dev) { |
| 1273 | ret = -EADDRNOTAVAIL; |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1274 | cma_enable_remove(conn_id); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1275 | rdma_destroy_id(new_cm_id); |
| 1276 | goto out; |
| 1277 | } |
| 1278 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); |
| 1279 | if (ret) { |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1280 | cma_enable_remove(conn_id); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1281 | rdma_destroy_id(new_cm_id); |
| 1282 | goto out; |
| 1283 | } |
| 1284 | |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1285 | mutex_lock(&lock); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1286 | ret = cma_acquire_dev(conn_id); |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1287 | mutex_unlock(&lock); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1288 | if (ret) { |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1289 | cma_enable_remove(conn_id); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1290 | rdma_destroy_id(new_cm_id); |
| 1291 | goto out; |
| 1292 | } |
| 1293 | |
| 1294 | conn_id->cm_id.iw = cm_id; |
| 1295 | cm_id->context = conn_id; |
| 1296 | cm_id->cm_handler = cma_iw_handler; |
| 1297 | |
| 1298 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; |
| 1299 | *sin = iw_event->local_addr; |
| 1300 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; |
| 1301 | *sin = iw_event->remote_addr; |
| 1302 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1303 | memset(&event, 0, sizeof event); |
| 1304 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; |
| 1305 | event.param.conn.private_data = iw_event->private_data; |
| 1306 | event.param.conn.private_data_len = iw_event->private_data_len; |
| 1307 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1308 | if (ret) { |
| 1309 | /* User wants to destroy the CM ID */ |
| 1310 | conn_id->cm_id.iw = NULL; |
| 1311 | cma_exch(conn_id, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1312 | cma_enable_remove(conn_id); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1313 | rdma_destroy_id(&conn_id->id); |
| 1314 | } |
| 1315 | |
| 1316 | out: |
| 1317 | if (dev) |
| 1318 | dev_put(dev); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1319 | cma_enable_remove(listen_id); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1320 | return ret; |
| 1321 | } |
| 1322 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1323 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
| 1324 | { |
| 1325 | struct ib_cm_compare_data compare_data; |
| 1326 | struct sockaddr *addr; |
| 1327 | __be64 svc_id; |
| 1328 | int ret; |
| 1329 | |
| 1330 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, |
| 1331 | id_priv); |
| 1332 | if (IS_ERR(id_priv->cm_id.ib)) |
| 1333 | return PTR_ERR(id_priv->cm_id.ib); |
| 1334 | |
| 1335 | addr = &id_priv->id.route.addr.src_addr; |
| 1336 | svc_id = cma_get_service_id(id_priv->id.ps, addr); |
| 1337 | if (cma_any_addr(addr)) |
| 1338 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); |
| 1339 | else { |
| 1340 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); |
| 1341 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); |
| 1342 | } |
| 1343 | |
| 1344 | if (ret) { |
| 1345 | ib_destroy_cm_id(id_priv->cm_id.ib); |
| 1346 | id_priv->cm_id.ib = NULL; |
| 1347 | } |
| 1348 | |
| 1349 | return ret; |
| 1350 | } |
| 1351 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1352 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
| 1353 | { |
| 1354 | int ret; |
| 1355 | struct sockaddr_in *sin; |
| 1356 | |
| 1357 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, |
| 1358 | iw_conn_req_handler, |
| 1359 | id_priv); |
| 1360 | if (IS_ERR(id_priv->cm_id.iw)) |
| 1361 | return PTR_ERR(id_priv->cm_id.iw); |
| 1362 | |
| 1363 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| 1364 | id_priv->cm_id.iw->local_addr = *sin; |
| 1365 | |
| 1366 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); |
| 1367 | |
| 1368 | if (ret) { |
| 1369 | iw_destroy_cm_id(id_priv->cm_id.iw); |
| 1370 | id_priv->cm_id.iw = NULL; |
| 1371 | } |
| 1372 | |
| 1373 | return ret; |
| 1374 | } |
| 1375 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1376 | static int cma_listen_handler(struct rdma_cm_id *id, |
| 1377 | struct rdma_cm_event *event) |
| 1378 | { |
| 1379 | struct rdma_id_private *id_priv = id->context; |
| 1380 | |
| 1381 | id->context = id_priv->id.context; |
| 1382 | id->event_handler = id_priv->id.event_handler; |
| 1383 | return id_priv->id.event_handler(id, event); |
| 1384 | } |
| 1385 | |
| 1386 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, |
| 1387 | struct cma_device *cma_dev) |
| 1388 | { |
| 1389 | struct rdma_id_private *dev_id_priv; |
| 1390 | struct rdma_cm_id *id; |
| 1391 | int ret; |
| 1392 | |
| 1393 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); |
| 1394 | if (IS_ERR(id)) |
| 1395 | return; |
| 1396 | |
| 1397 | dev_id_priv = container_of(id, struct rdma_id_private, id); |
| 1398 | |
| 1399 | dev_id_priv->state = CMA_ADDR_BOUND; |
| 1400 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, |
| 1401 | ip_addr_size(&id_priv->id.route.addr.src_addr)); |
| 1402 | |
| 1403 | cma_attach_to_dev(dev_id_priv, cma_dev); |
| 1404 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); |
| 1405 | |
| 1406 | ret = rdma_listen(id, id_priv->backlog); |
| 1407 | if (ret) |
| 1408 | goto err; |
| 1409 | |
| 1410 | return; |
| 1411 | err: |
| 1412 | cma_destroy_listen(dev_id_priv); |
| 1413 | } |
| 1414 | |
| 1415 | static void cma_listen_on_all(struct rdma_id_private *id_priv) |
| 1416 | { |
| 1417 | struct cma_device *cma_dev; |
| 1418 | |
| 1419 | mutex_lock(&lock); |
| 1420 | list_add_tail(&id_priv->list, &listen_any_list); |
| 1421 | list_for_each_entry(cma_dev, &dev_list, list) |
| 1422 | cma_listen_on_dev(id_priv, cma_dev); |
| 1423 | mutex_unlock(&lock); |
| 1424 | } |
| 1425 | |
| 1426 | static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) |
| 1427 | { |
| 1428 | struct sockaddr_in addr_in; |
| 1429 | |
| 1430 | memset(&addr_in, 0, sizeof addr_in); |
| 1431 | addr_in.sin_family = af; |
| 1432 | return rdma_bind_addr(id, (struct sockaddr *) &addr_in); |
| 1433 | } |
| 1434 | |
| 1435 | int rdma_listen(struct rdma_cm_id *id, int backlog) |
| 1436 | { |
| 1437 | struct rdma_id_private *id_priv; |
| 1438 | int ret; |
| 1439 | |
| 1440 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1441 | if (id_priv->state == CMA_IDLE) { |
| 1442 | ret = cma_bind_any(id, AF_INET); |
| 1443 | if (ret) |
| 1444 | return ret; |
| 1445 | } |
| 1446 | |
| 1447 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) |
| 1448 | return -EINVAL; |
| 1449 | |
| 1450 | id_priv->backlog = backlog; |
| 1451 | if (id->device) { |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1452 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 1453 | case RDMA_TRANSPORT_IB: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1454 | ret = cma_ib_listen(id_priv); |
| 1455 | if (ret) |
| 1456 | goto err; |
| 1457 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1458 | case RDMA_TRANSPORT_IWARP: |
| 1459 | ret = cma_iw_listen(id_priv, backlog); |
| 1460 | if (ret) |
| 1461 | goto err; |
| 1462 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1463 | default: |
| 1464 | ret = -ENOSYS; |
| 1465 | goto err; |
| 1466 | } |
| 1467 | } else |
| 1468 | cma_listen_on_all(id_priv); |
| 1469 | |
| 1470 | return 0; |
| 1471 | err: |
| 1472 | id_priv->backlog = 0; |
| 1473 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); |
| 1474 | return ret; |
| 1475 | } |
| 1476 | EXPORT_SYMBOL(rdma_listen); |
| 1477 | |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 1478 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
| 1479 | { |
| 1480 | struct rdma_id_private *id_priv; |
| 1481 | |
| 1482 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1483 | id_priv->tos = (u8) tos; |
| 1484 | } |
| 1485 | EXPORT_SYMBOL(rdma_set_service_type); |
| 1486 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1487 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
| 1488 | void *context) |
| 1489 | { |
| 1490 | struct cma_work *work = context; |
| 1491 | struct rdma_route *route; |
| 1492 | |
| 1493 | route = &work->id->id.route; |
| 1494 | |
| 1495 | if (!status) { |
| 1496 | route->num_paths = 1; |
| 1497 | *route->path_rec = *path_rec; |
| 1498 | } else { |
| 1499 | work->old_state = CMA_ROUTE_QUERY; |
| 1500 | work->new_state = CMA_ADDR_RESOLVED; |
| 1501 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; |
Sean Hefty | 8f0472d | 2006-09-29 11:57:09 -0700 | [diff] [blame] | 1502 | work->event.status = status; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1503 | } |
| 1504 | |
| 1505 | queue_work(cma_wq, &work->work); |
| 1506 | } |
| 1507 | |
| 1508 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, |
| 1509 | struct cma_work *work) |
| 1510 | { |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 1511 | struct rdma_addr *addr = &id_priv->id.route.addr; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1512 | struct ib_sa_path_rec path_rec; |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 1513 | ib_sa_comp_mask comp_mask; |
| 1514 | struct sockaddr_in6 *sin6; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1515 | |
| 1516 | memset(&path_rec, 0, sizeof path_rec); |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 1517 | ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
| 1518 | ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); |
| 1519 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1520 | path_rec.numb_path = 1; |
Sean Hefty | 962063e | 2007-02-21 16:40:44 -0800 | [diff] [blame] | 1521 | path_rec.reversible = 1; |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 1522 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr); |
| 1523 | |
| 1524 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | |
| 1525 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | |
| 1526 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; |
| 1527 | |
| 1528 | if (addr->src_addr.sa_family == AF_INET) { |
| 1529 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); |
| 1530 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; |
| 1531 | } else { |
| 1532 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; |
| 1533 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); |
| 1534 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; |
| 1535 | } |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1536 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 1537 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
Sean Hefty | a81c994 | 2007-08-08 15:51:06 -0700 | [diff] [blame^] | 1538 | id_priv->id.port_num, &path_rec, |
| 1539 | comp_mask, timeout_ms, |
| 1540 | GFP_KERNEL, cma_query_handler, |
| 1541 | work, &id_priv->query); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1542 | |
| 1543 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; |
| 1544 | } |
| 1545 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1546 | static void cma_work_handler(struct work_struct *_work) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1547 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1548 | struct cma_work *work = container_of(_work, struct cma_work, work); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1549 | struct rdma_id_private *id_priv = work->id; |
| 1550 | int destroy = 0; |
| 1551 | |
| 1552 | atomic_inc(&id_priv->dev_remove); |
| 1553 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) |
| 1554 | goto out; |
| 1555 | |
| 1556 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { |
| 1557 | cma_exch(id_priv, CMA_DESTROYING); |
| 1558 | destroy = 1; |
| 1559 | } |
| 1560 | out: |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1561 | cma_enable_remove(id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1562 | cma_deref_id(id_priv); |
| 1563 | if (destroy) |
| 1564 | rdma_destroy_id(&id_priv->id); |
| 1565 | kfree(work); |
| 1566 | } |
| 1567 | |
| 1568 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) |
| 1569 | { |
| 1570 | struct rdma_route *route = &id_priv->id.route; |
| 1571 | struct cma_work *work; |
| 1572 | int ret; |
| 1573 | |
| 1574 | work = kzalloc(sizeof *work, GFP_KERNEL); |
| 1575 | if (!work) |
| 1576 | return -ENOMEM; |
| 1577 | |
| 1578 | work->id = id_priv; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1579 | INIT_WORK(&work->work, cma_work_handler); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1580 | work->old_state = CMA_ROUTE_QUERY; |
| 1581 | work->new_state = CMA_ROUTE_RESOLVED; |
| 1582 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; |
| 1583 | |
| 1584 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); |
| 1585 | if (!route->path_rec) { |
| 1586 | ret = -ENOMEM; |
| 1587 | goto err1; |
| 1588 | } |
| 1589 | |
| 1590 | ret = cma_query_ib_route(id_priv, timeout_ms, work); |
| 1591 | if (ret) |
| 1592 | goto err2; |
| 1593 | |
| 1594 | return 0; |
| 1595 | err2: |
| 1596 | kfree(route->path_rec); |
| 1597 | route->path_rec = NULL; |
| 1598 | err1: |
| 1599 | kfree(work); |
| 1600 | return ret; |
| 1601 | } |
| 1602 | |
| 1603 | int rdma_set_ib_paths(struct rdma_cm_id *id, |
| 1604 | struct ib_sa_path_rec *path_rec, int num_paths) |
| 1605 | { |
| 1606 | struct rdma_id_private *id_priv; |
| 1607 | int ret; |
| 1608 | |
| 1609 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1610 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) |
| 1611 | return -EINVAL; |
| 1612 | |
| 1613 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); |
| 1614 | if (!id->route.path_rec) { |
| 1615 | ret = -ENOMEM; |
| 1616 | goto err; |
| 1617 | } |
| 1618 | |
| 1619 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); |
| 1620 | return 0; |
| 1621 | err: |
| 1622 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); |
| 1623 | return ret; |
| 1624 | } |
| 1625 | EXPORT_SYMBOL(rdma_set_ib_paths); |
| 1626 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1627 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
| 1628 | { |
| 1629 | struct cma_work *work; |
| 1630 | |
| 1631 | work = kzalloc(sizeof *work, GFP_KERNEL); |
| 1632 | if (!work) |
| 1633 | return -ENOMEM; |
| 1634 | |
| 1635 | work->id = id_priv; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1636 | INIT_WORK(&work->work, cma_work_handler); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1637 | work->old_state = CMA_ROUTE_QUERY; |
| 1638 | work->new_state = CMA_ROUTE_RESOLVED; |
| 1639 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; |
| 1640 | queue_work(cma_wq, &work->work); |
| 1641 | return 0; |
| 1642 | } |
| 1643 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1644 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
| 1645 | { |
| 1646 | struct rdma_id_private *id_priv; |
| 1647 | int ret; |
| 1648 | |
| 1649 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1650 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) |
| 1651 | return -EINVAL; |
| 1652 | |
| 1653 | atomic_inc(&id_priv->refcount); |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1654 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 1655 | case RDMA_TRANSPORT_IB: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1656 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
| 1657 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 1658 | case RDMA_TRANSPORT_IWARP: |
| 1659 | ret = cma_resolve_iw_route(id_priv, timeout_ms); |
| 1660 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1661 | default: |
| 1662 | ret = -ENOSYS; |
| 1663 | break; |
| 1664 | } |
| 1665 | if (ret) |
| 1666 | goto err; |
| 1667 | |
| 1668 | return 0; |
| 1669 | err: |
| 1670 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); |
| 1671 | cma_deref_id(id_priv); |
| 1672 | return ret; |
| 1673 | } |
| 1674 | EXPORT_SYMBOL(rdma_resolve_route); |
| 1675 | |
| 1676 | static int cma_bind_loopback(struct rdma_id_private *id_priv) |
| 1677 | { |
| 1678 | struct cma_device *cma_dev; |
| 1679 | struct ib_port_attr port_attr; |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1680 | union ib_gid gid; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1681 | u16 pkey; |
| 1682 | int ret; |
| 1683 | u8 p; |
| 1684 | |
| 1685 | mutex_lock(&lock); |
Krishna Kumar | e82153b | 2006-10-16 10:09:01 +0530 | [diff] [blame] | 1686 | if (list_empty(&dev_list)) { |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1687 | ret = -ENODEV; |
| 1688 | goto out; |
| 1689 | } |
Krishna Kumar | e82153b | 2006-10-16 10:09:01 +0530 | [diff] [blame] | 1690 | list_for_each_entry(cma_dev, &dev_list, list) |
| 1691 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) |
| 1692 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
| 1693 | port_attr.state == IB_PORT_ACTIVE) |
| 1694 | goto port_found; |
| 1695 | |
| 1696 | p = 1; |
| 1697 | cma_dev = list_entry(dev_list.next, struct cma_device, list); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1698 | |
| 1699 | port_found: |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1700 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1701 | if (ret) |
| 1702 | goto out; |
| 1703 | |
| 1704 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); |
| 1705 | if (ret) |
| 1706 | goto out; |
| 1707 | |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1708 | ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1709 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
| 1710 | id_priv->id.port_num = p; |
| 1711 | cma_attach_to_dev(id_priv, cma_dev); |
| 1712 | out: |
| 1713 | mutex_unlock(&lock); |
| 1714 | return ret; |
| 1715 | } |
| 1716 | |
| 1717 | static void addr_handler(int status, struct sockaddr *src_addr, |
| 1718 | struct rdma_dev_addr *dev_addr, void *context) |
| 1719 | { |
| 1720 | struct rdma_id_private *id_priv = context; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1721 | struct rdma_cm_event event; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1722 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1723 | memset(&event, 0, sizeof event); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1724 | atomic_inc(&id_priv->dev_remove); |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1725 | |
| 1726 | /* |
| 1727 | * Grab mutex to block rdma_destroy_id() from removing the device while |
| 1728 | * we're trying to acquire it. |
| 1729 | */ |
| 1730 | mutex_lock(&lock); |
| 1731 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { |
| 1732 | mutex_unlock(&lock); |
| 1733 | goto out; |
| 1734 | } |
| 1735 | |
| 1736 | if (!status && !id_priv->cma_dev) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1737 | status = cma_acquire_dev(id_priv); |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1738 | mutex_unlock(&lock); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1739 | |
| 1740 | if (status) { |
Sean Hefty | 61a73c7 | 2006-09-01 15:33:55 -0700 | [diff] [blame] | 1741 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1742 | goto out; |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1743 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
| 1744 | event.status = status; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1745 | } else { |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1746 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
| 1747 | ip_addr_size(src_addr)); |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1748 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1749 | } |
| 1750 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 1751 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1752 | cma_exch(id_priv, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1753 | cma_enable_remove(id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1754 | cma_deref_id(id_priv); |
| 1755 | rdma_destroy_id(&id_priv->id); |
| 1756 | return; |
| 1757 | } |
| 1758 | out: |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 1759 | cma_enable_remove(id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1760 | cma_deref_id(id_priv); |
| 1761 | } |
| 1762 | |
| 1763 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) |
| 1764 | { |
| 1765 | struct cma_work *work; |
| 1766 | struct sockaddr_in *src_in, *dst_in; |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1767 | union ib_gid gid; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1768 | int ret; |
| 1769 | |
| 1770 | work = kzalloc(sizeof *work, GFP_KERNEL); |
| 1771 | if (!work) |
| 1772 | return -ENOMEM; |
| 1773 | |
| 1774 | if (!id_priv->cma_dev) { |
| 1775 | ret = cma_bind_loopback(id_priv); |
| 1776 | if (ret) |
| 1777 | goto err; |
| 1778 | } |
| 1779 | |
Michael S. Tsirkin | f0ee340 | 2006-07-14 00:23:52 -0700 | [diff] [blame] | 1780 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
| 1781 | ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1782 | |
| 1783 | if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { |
| 1784 | src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; |
| 1785 | dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; |
| 1786 | src_in->sin_family = dst_in->sin_family; |
| 1787 | src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; |
| 1788 | } |
| 1789 | |
| 1790 | work->id = id_priv; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1791 | INIT_WORK(&work->work, cma_work_handler); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1792 | work->old_state = CMA_ADDR_QUERY; |
| 1793 | work->new_state = CMA_ADDR_RESOLVED; |
| 1794 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
| 1795 | queue_work(cma_wq, &work->work); |
| 1796 | return 0; |
| 1797 | err: |
| 1798 | kfree(work); |
| 1799 | return ret; |
| 1800 | } |
| 1801 | |
| 1802 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, |
| 1803 | struct sockaddr *dst_addr) |
| 1804 | { |
| 1805 | if (src_addr && src_addr->sa_family) |
| 1806 | return rdma_bind_addr(id, src_addr); |
| 1807 | else |
| 1808 | return cma_bind_any(id, dst_addr->sa_family); |
| 1809 | } |
| 1810 | |
| 1811 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, |
| 1812 | struct sockaddr *dst_addr, int timeout_ms) |
| 1813 | { |
| 1814 | struct rdma_id_private *id_priv; |
| 1815 | int ret; |
| 1816 | |
| 1817 | id_priv = container_of(id, struct rdma_id_private, id); |
| 1818 | if (id_priv->state == CMA_IDLE) { |
| 1819 | ret = cma_bind_addr(id, src_addr, dst_addr); |
| 1820 | if (ret) |
| 1821 | return ret; |
| 1822 | } |
| 1823 | |
| 1824 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) |
| 1825 | return -EINVAL; |
| 1826 | |
| 1827 | atomic_inc(&id_priv->refcount); |
| 1828 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); |
| 1829 | if (cma_any_addr(dst_addr)) |
| 1830 | ret = cma_resolve_loopback(id_priv); |
| 1831 | else |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 1832 | ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr, |
| 1833 | dst_addr, &id->route.addr.dev_addr, |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1834 | timeout_ms, addr_handler, id_priv); |
| 1835 | if (ret) |
| 1836 | goto err; |
| 1837 | |
| 1838 | return 0; |
| 1839 | err: |
| 1840 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); |
| 1841 | cma_deref_id(id_priv); |
| 1842 | return ret; |
| 1843 | } |
| 1844 | EXPORT_SYMBOL(rdma_resolve_addr); |
| 1845 | |
| 1846 | static void cma_bind_port(struct rdma_bind_list *bind_list, |
| 1847 | struct rdma_id_private *id_priv) |
| 1848 | { |
| 1849 | struct sockaddr_in *sin; |
| 1850 | |
| 1851 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| 1852 | sin->sin_port = htons(bind_list->port); |
| 1853 | id_priv->bind_list = bind_list; |
| 1854 | hlist_add_head(&id_priv->node, &bind_list->owners); |
| 1855 | } |
| 1856 | |
| 1857 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, |
| 1858 | unsigned short snum) |
| 1859 | { |
| 1860 | struct rdma_bind_list *bind_list; |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1861 | int port, ret; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1862 | |
Sean Hefty | cb164b8 | 2007-03-05 12:50:17 -0800 | [diff] [blame] | 1863 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1864 | if (!bind_list) |
| 1865 | return -ENOMEM; |
| 1866 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1867 | do { |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1868 | ret = idr_get_new_above(ps, bind_list, snum, &port); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1869 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
| 1870 | |
| 1871 | if (ret) |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1872 | goto err1; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1873 | |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1874 | if (port != snum) { |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1875 | ret = -EADDRNOTAVAIL; |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1876 | goto err2; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1877 | } |
| 1878 | |
| 1879 | bind_list->ps = ps; |
| 1880 | bind_list->port = (unsigned short) port; |
| 1881 | cma_bind_port(bind_list, id_priv); |
| 1882 | return 0; |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1883 | err2: |
| 1884 | idr_remove(ps, port); |
| 1885 | err1: |
| 1886 | kfree(bind_list); |
| 1887 | return ret; |
| 1888 | } |
| 1889 | |
| 1890 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
| 1891 | { |
| 1892 | struct rdma_bind_list *bind_list; |
| 1893 | int port, ret; |
| 1894 | |
| 1895 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
| 1896 | if (!bind_list) |
| 1897 | return -ENOMEM; |
| 1898 | |
| 1899 | retry: |
| 1900 | do { |
| 1901 | ret = idr_get_new_above(ps, bind_list, next_port, &port); |
| 1902 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
| 1903 | |
| 1904 | if (ret) |
| 1905 | goto err1; |
| 1906 | |
| 1907 | if (port > sysctl_local_port_range[1]) { |
| 1908 | if (next_port != sysctl_local_port_range[0]) { |
| 1909 | idr_remove(ps, port); |
| 1910 | next_port = sysctl_local_port_range[0]; |
| 1911 | goto retry; |
| 1912 | } |
| 1913 | ret = -EADDRNOTAVAIL; |
| 1914 | goto err2; |
| 1915 | } |
| 1916 | |
| 1917 | if (port == sysctl_local_port_range[1]) |
| 1918 | next_port = sysctl_local_port_range[0]; |
| 1919 | else |
| 1920 | next_port = port + 1; |
| 1921 | |
| 1922 | bind_list->ps = ps; |
| 1923 | bind_list->port = (unsigned short) port; |
| 1924 | cma_bind_port(bind_list, id_priv); |
| 1925 | return 0; |
| 1926 | err2: |
| 1927 | idr_remove(ps, port); |
| 1928 | err1: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1929 | kfree(bind_list); |
| 1930 | return ret; |
| 1931 | } |
| 1932 | |
| 1933 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) |
| 1934 | { |
| 1935 | struct rdma_id_private *cur_id; |
| 1936 | struct sockaddr_in *sin, *cur_sin; |
| 1937 | struct rdma_bind_list *bind_list; |
| 1938 | struct hlist_node *node; |
| 1939 | unsigned short snum; |
| 1940 | |
| 1941 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| 1942 | snum = ntohs(sin->sin_port); |
| 1943 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) |
| 1944 | return -EACCES; |
| 1945 | |
| 1946 | bind_list = idr_find(ps, snum); |
| 1947 | if (!bind_list) |
| 1948 | return cma_alloc_port(ps, id_priv, snum); |
| 1949 | |
| 1950 | /* |
| 1951 | * We don't support binding to any address if anyone is bound to |
| 1952 | * a specific address on the same port. |
| 1953 | */ |
| 1954 | if (cma_any_addr(&id_priv->id.route.addr.src_addr)) |
| 1955 | return -EADDRNOTAVAIL; |
| 1956 | |
| 1957 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { |
| 1958 | if (cma_any_addr(&cur_id->id.route.addr.src_addr)) |
| 1959 | return -EADDRNOTAVAIL; |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 1960 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1961 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
| 1962 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) |
| 1963 | return -EADDRINUSE; |
| 1964 | } |
| 1965 | |
| 1966 | cma_bind_port(bind_list, id_priv); |
| 1967 | return 0; |
| 1968 | } |
| 1969 | |
| 1970 | static int cma_get_port(struct rdma_id_private *id_priv) |
| 1971 | { |
| 1972 | struct idr *ps; |
| 1973 | int ret; |
| 1974 | |
| 1975 | switch (id_priv->id.ps) { |
| 1976 | case RDMA_PS_SDP: |
| 1977 | ps = &sdp_ps; |
| 1978 | break; |
| 1979 | case RDMA_PS_TCP: |
| 1980 | ps = &tcp_ps; |
| 1981 | break; |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 1982 | case RDMA_PS_UDP: |
| 1983 | ps = &udp_ps; |
| 1984 | break; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1985 | case RDMA_PS_IPOIB: |
| 1986 | ps = &ipoib_ps; |
| 1987 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1988 | default: |
| 1989 | return -EPROTONOSUPPORT; |
| 1990 | } |
| 1991 | |
| 1992 | mutex_lock(&lock); |
| 1993 | if (cma_any_port(&id_priv->id.route.addr.src_addr)) |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 1994 | ret = cma_alloc_any_port(ps, id_priv); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 1995 | else |
| 1996 | ret = cma_use_port(ps, id_priv); |
| 1997 | mutex_unlock(&lock); |
| 1998 | |
| 1999 | return ret; |
| 2000 | } |
| 2001 | |
| 2002 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) |
| 2003 | { |
| 2004 | struct rdma_id_private *id_priv; |
| 2005 | int ret; |
| 2006 | |
| 2007 | if (addr->sa_family != AF_INET) |
| 2008 | return -EAFNOSUPPORT; |
| 2009 | |
| 2010 | id_priv = container_of(id, struct rdma_id_private, id); |
| 2011 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) |
| 2012 | return -EINVAL; |
| 2013 | |
| 2014 | if (!cma_any_addr(addr)) { |
| 2015 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2016 | if (ret) |
Krishna Kumar | 255d0c1 | 2006-10-24 13:22:28 -0700 | [diff] [blame] | 2017 | goto err1; |
| 2018 | |
| 2019 | mutex_lock(&lock); |
| 2020 | ret = cma_acquire_dev(id_priv); |
| 2021 | mutex_unlock(&lock); |
| 2022 | if (ret) |
| 2023 | goto err1; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2024 | } |
| 2025 | |
| 2026 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); |
| 2027 | ret = cma_get_port(id_priv); |
| 2028 | if (ret) |
Krishna Kumar | 255d0c1 | 2006-10-24 13:22:28 -0700 | [diff] [blame] | 2029 | goto err2; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2030 | |
| 2031 | return 0; |
Krishna Kumar | 255d0c1 | 2006-10-24 13:22:28 -0700 | [diff] [blame] | 2032 | err2: |
| 2033 | if (!cma_any_addr(addr)) { |
| 2034 | mutex_lock(&lock); |
| 2035 | cma_detach_from_dev(id_priv); |
| 2036 | mutex_unlock(&lock); |
| 2037 | } |
| 2038 | err1: |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2039 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
| 2040 | return ret; |
| 2041 | } |
| 2042 | EXPORT_SYMBOL(rdma_bind_addr); |
| 2043 | |
| 2044 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, |
| 2045 | struct rdma_route *route) |
| 2046 | { |
| 2047 | struct sockaddr_in *src4, *dst4; |
| 2048 | struct cma_hdr *cma_hdr; |
| 2049 | struct sdp_hh *sdp_hdr; |
| 2050 | |
| 2051 | src4 = (struct sockaddr_in *) &route->addr.src_addr; |
| 2052 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; |
| 2053 | |
| 2054 | switch (ps) { |
| 2055 | case RDMA_PS_SDP: |
| 2056 | sdp_hdr = hdr; |
| 2057 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) |
| 2058 | return -EINVAL; |
| 2059 | sdp_set_ip_ver(sdp_hdr, 4); |
| 2060 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; |
| 2061 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; |
| 2062 | sdp_hdr->port = src4->sin_port; |
| 2063 | break; |
| 2064 | default: |
| 2065 | cma_hdr = hdr; |
| 2066 | cma_hdr->cma_version = CMA_VERSION; |
| 2067 | cma_set_ip_ver(cma_hdr, 4); |
| 2068 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; |
| 2069 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; |
| 2070 | cma_hdr->port = src4->sin_port; |
| 2071 | break; |
| 2072 | } |
| 2073 | return 0; |
| 2074 | } |
| 2075 | |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2076 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
| 2077 | struct ib_cm_event *ib_event) |
| 2078 | { |
| 2079 | struct rdma_id_private *id_priv = cm_id->context; |
| 2080 | struct rdma_cm_event event; |
| 2081 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; |
| 2082 | int ret = 0; |
| 2083 | |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2084 | if (cma_disable_remove(id_priv, CMA_CONNECT)) |
| 2085 | return 0; |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2086 | |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2087 | memset(&event, 0, sizeof event); |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2088 | switch (ib_event->event) { |
| 2089 | case IB_CM_SIDR_REQ_ERROR: |
| 2090 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
| 2091 | event.status = -ETIMEDOUT; |
| 2092 | break; |
| 2093 | case IB_CM_SIDR_REP_RECEIVED: |
| 2094 | event.param.ud.private_data = ib_event->private_data; |
| 2095 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; |
| 2096 | if (rep->status != IB_SIDR_SUCCESS) { |
| 2097 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
| 2098 | event.status = ib_event->param.sidr_rep_rcvd.status; |
| 2099 | break; |
| 2100 | } |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2101 | if (id_priv->qkey != rep->qkey) { |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2102 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
| 2103 | event.status = -EINVAL; |
| 2104 | break; |
| 2105 | } |
| 2106 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, |
| 2107 | id_priv->id.route.path_rec, |
| 2108 | &event.param.ud.ah_attr); |
| 2109 | event.param.ud.qp_num = rep->qpn; |
| 2110 | event.param.ud.qkey = rep->qkey; |
| 2111 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
| 2112 | event.status = 0; |
| 2113 | break; |
| 2114 | default: |
| 2115 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", |
| 2116 | ib_event->event); |
| 2117 | goto out; |
| 2118 | } |
| 2119 | |
| 2120 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
| 2121 | if (ret) { |
| 2122 | /* Destroy the CM ID by returning a non-zero value. */ |
| 2123 | id_priv->cm_id.ib = NULL; |
| 2124 | cma_exch(id_priv, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2125 | cma_enable_remove(id_priv); |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2126 | rdma_destroy_id(&id_priv->id); |
| 2127 | return ret; |
| 2128 | } |
| 2129 | out: |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2130 | cma_enable_remove(id_priv); |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2131 | return ret; |
| 2132 | } |
| 2133 | |
| 2134 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, |
| 2135 | struct rdma_conn_param *conn_param) |
| 2136 | { |
| 2137 | struct ib_cm_sidr_req_param req; |
| 2138 | struct rdma_route *route; |
| 2139 | int ret; |
| 2140 | |
| 2141 | req.private_data_len = sizeof(struct cma_hdr) + |
| 2142 | conn_param->private_data_len; |
| 2143 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); |
| 2144 | if (!req.private_data) |
| 2145 | return -ENOMEM; |
| 2146 | |
| 2147 | if (conn_param->private_data && conn_param->private_data_len) |
| 2148 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), |
| 2149 | conn_param->private_data, conn_param->private_data_len); |
| 2150 | |
| 2151 | route = &id_priv->id.route; |
| 2152 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); |
| 2153 | if (ret) |
| 2154 | goto out; |
| 2155 | |
| 2156 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, |
| 2157 | cma_sidr_rep_handler, id_priv); |
| 2158 | if (IS_ERR(id_priv->cm_id.ib)) { |
| 2159 | ret = PTR_ERR(id_priv->cm_id.ib); |
| 2160 | goto out; |
| 2161 | } |
| 2162 | |
| 2163 | req.path = route->path_rec; |
| 2164 | req.service_id = cma_get_service_id(id_priv->id.ps, |
| 2165 | &route->addr.dst_addr); |
| 2166 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); |
| 2167 | req.max_cm_retries = CMA_MAX_CM_RETRIES; |
| 2168 | |
| 2169 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); |
| 2170 | if (ret) { |
| 2171 | ib_destroy_cm_id(id_priv->cm_id.ib); |
| 2172 | id_priv->cm_id.ib = NULL; |
| 2173 | } |
| 2174 | out: |
| 2175 | kfree(req.private_data); |
| 2176 | return ret; |
| 2177 | } |
| 2178 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2179 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
| 2180 | struct rdma_conn_param *conn_param) |
| 2181 | { |
| 2182 | struct ib_cm_req_param req; |
| 2183 | struct rdma_route *route; |
| 2184 | void *private_data; |
| 2185 | int offset, ret; |
| 2186 | |
| 2187 | memset(&req, 0, sizeof req); |
| 2188 | offset = cma_user_data_offset(id_priv->id.ps); |
| 2189 | req.private_data_len = offset + conn_param->private_data_len; |
| 2190 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); |
| 2191 | if (!private_data) |
| 2192 | return -ENOMEM; |
| 2193 | |
| 2194 | if (conn_param->private_data && conn_param->private_data_len) |
| 2195 | memcpy(private_data + offset, conn_param->private_data, |
| 2196 | conn_param->private_data_len); |
| 2197 | |
| 2198 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, |
| 2199 | id_priv); |
| 2200 | if (IS_ERR(id_priv->cm_id.ib)) { |
| 2201 | ret = PTR_ERR(id_priv->cm_id.ib); |
| 2202 | goto out; |
| 2203 | } |
| 2204 | |
| 2205 | route = &id_priv->id.route; |
| 2206 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); |
| 2207 | if (ret) |
| 2208 | goto out; |
| 2209 | req.private_data = private_data; |
| 2210 | |
| 2211 | req.primary_path = &route->path_rec[0]; |
| 2212 | if (route->num_paths == 2) |
| 2213 | req.alternate_path = &route->path_rec[1]; |
| 2214 | |
| 2215 | req.service_id = cma_get_service_id(id_priv->id.ps, |
| 2216 | &route->addr.dst_addr); |
| 2217 | req.qp_num = id_priv->qp_num; |
Sean Hefty | 9b2e9c0 | 2006-11-30 16:30:47 -0800 | [diff] [blame] | 2218 | req.qp_type = IB_QPT_RC; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2219 | req.starting_psn = id_priv->seq_num; |
| 2220 | req.responder_resources = conn_param->responder_resources; |
| 2221 | req.initiator_depth = conn_param->initiator_depth; |
| 2222 | req.flow_control = conn_param->flow_control; |
| 2223 | req.retry_count = conn_param->retry_count; |
| 2224 | req.rnr_retry_count = conn_param->rnr_retry_count; |
| 2225 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; |
| 2226 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; |
| 2227 | req.max_cm_retries = CMA_MAX_CM_RETRIES; |
| 2228 | req.srq = id_priv->srq ? 1 : 0; |
| 2229 | |
| 2230 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); |
| 2231 | out: |
Krishna Kumar | 675a027 | 2006-09-29 11:47:06 -0700 | [diff] [blame] | 2232 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
| 2233 | ib_destroy_cm_id(id_priv->cm_id.ib); |
| 2234 | id_priv->cm_id.ib = NULL; |
| 2235 | } |
| 2236 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2237 | kfree(private_data); |
| 2238 | return ret; |
| 2239 | } |
| 2240 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2241 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
| 2242 | struct rdma_conn_param *conn_param) |
| 2243 | { |
| 2244 | struct iw_cm_id *cm_id; |
| 2245 | struct sockaddr_in* sin; |
| 2246 | int ret; |
| 2247 | struct iw_cm_conn_param iw_param; |
| 2248 | |
| 2249 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); |
| 2250 | if (IS_ERR(cm_id)) { |
| 2251 | ret = PTR_ERR(cm_id); |
| 2252 | goto out; |
| 2253 | } |
| 2254 | |
| 2255 | id_priv->cm_id.iw = cm_id; |
| 2256 | |
| 2257 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; |
| 2258 | cm_id->local_addr = *sin; |
| 2259 | |
| 2260 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; |
| 2261 | cm_id->remote_addr = *sin; |
| 2262 | |
| 2263 | ret = cma_modify_qp_rtr(&id_priv->id); |
Krishna Kumar | 675a027 | 2006-09-29 11:47:06 -0700 | [diff] [blame] | 2264 | if (ret) |
| 2265 | goto out; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2266 | |
| 2267 | iw_param.ord = conn_param->initiator_depth; |
| 2268 | iw_param.ird = conn_param->responder_resources; |
| 2269 | iw_param.private_data = conn_param->private_data; |
| 2270 | iw_param.private_data_len = conn_param->private_data_len; |
| 2271 | if (id_priv->id.qp) |
| 2272 | iw_param.qpn = id_priv->qp_num; |
| 2273 | else |
| 2274 | iw_param.qpn = conn_param->qp_num; |
| 2275 | ret = iw_cm_connect(cm_id, &iw_param); |
| 2276 | out: |
Krishna Kumar | 675a027 | 2006-09-29 11:47:06 -0700 | [diff] [blame] | 2277 | if (ret && !IS_ERR(cm_id)) { |
| 2278 | iw_destroy_cm_id(cm_id); |
| 2279 | id_priv->cm_id.iw = NULL; |
| 2280 | } |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2281 | return ret; |
| 2282 | } |
| 2283 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2284 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
| 2285 | { |
| 2286 | struct rdma_id_private *id_priv; |
| 2287 | int ret; |
| 2288 | |
| 2289 | id_priv = container_of(id, struct rdma_id_private, id); |
| 2290 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) |
| 2291 | return -EINVAL; |
| 2292 | |
| 2293 | if (!id->qp) { |
| 2294 | id_priv->qp_num = conn_param->qp_num; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2295 | id_priv->srq = conn_param->srq; |
| 2296 | } |
| 2297 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2298 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 2299 | case RDMA_TRANSPORT_IB: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2300 | if (cma_is_ud_ps(id->ps)) |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2301 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
| 2302 | else |
| 2303 | ret = cma_connect_ib(id_priv, conn_param); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2304 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2305 | case RDMA_TRANSPORT_IWARP: |
| 2306 | ret = cma_connect_iw(id_priv, conn_param); |
| 2307 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2308 | default: |
| 2309 | ret = -ENOSYS; |
| 2310 | break; |
| 2311 | } |
| 2312 | if (ret) |
| 2313 | goto err; |
| 2314 | |
| 2315 | return 0; |
| 2316 | err: |
| 2317 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); |
| 2318 | return ret; |
| 2319 | } |
| 2320 | EXPORT_SYMBOL(rdma_connect); |
| 2321 | |
| 2322 | static int cma_accept_ib(struct rdma_id_private *id_priv, |
| 2323 | struct rdma_conn_param *conn_param) |
| 2324 | { |
| 2325 | struct ib_cm_rep_param rep; |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 2326 | struct ib_qp_attr qp_attr; |
| 2327 | int qp_attr_mask, ret; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2328 | |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 2329 | if (id_priv->id.qp) { |
| 2330 | ret = cma_modify_qp_rtr(&id_priv->id); |
| 2331 | if (ret) |
| 2332 | goto out; |
| 2333 | |
| 2334 | qp_attr.qp_state = IB_QPS_RTS; |
| 2335 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr, |
| 2336 | &qp_attr_mask); |
| 2337 | if (ret) |
| 2338 | goto out; |
| 2339 | |
| 2340 | qp_attr.max_rd_atomic = conn_param->initiator_depth; |
| 2341 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
| 2342 | if (ret) |
| 2343 | goto out; |
| 2344 | } |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2345 | |
| 2346 | memset(&rep, 0, sizeof rep); |
| 2347 | rep.qp_num = id_priv->qp_num; |
| 2348 | rep.starting_psn = id_priv->seq_num; |
| 2349 | rep.private_data = conn_param->private_data; |
| 2350 | rep.private_data_len = conn_param->private_data_len; |
| 2351 | rep.responder_resources = conn_param->responder_resources; |
| 2352 | rep.initiator_depth = conn_param->initiator_depth; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2353 | rep.failover_accepted = 0; |
| 2354 | rep.flow_control = conn_param->flow_control; |
| 2355 | rep.rnr_retry_count = conn_param->rnr_retry_count; |
| 2356 | rep.srq = id_priv->srq ? 1 : 0; |
| 2357 | |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 2358 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
| 2359 | out: |
| 2360 | return ret; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2361 | } |
| 2362 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2363 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
| 2364 | struct rdma_conn_param *conn_param) |
| 2365 | { |
| 2366 | struct iw_cm_conn_param iw_param; |
| 2367 | int ret; |
| 2368 | |
| 2369 | ret = cma_modify_qp_rtr(&id_priv->id); |
| 2370 | if (ret) |
| 2371 | return ret; |
| 2372 | |
| 2373 | iw_param.ord = conn_param->initiator_depth; |
| 2374 | iw_param.ird = conn_param->responder_resources; |
| 2375 | iw_param.private_data = conn_param->private_data; |
| 2376 | iw_param.private_data_len = conn_param->private_data_len; |
| 2377 | if (id_priv->id.qp) { |
| 2378 | iw_param.qpn = id_priv->qp_num; |
| 2379 | } else |
| 2380 | iw_param.qpn = conn_param->qp_num; |
| 2381 | |
| 2382 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); |
| 2383 | } |
| 2384 | |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2385 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
| 2386 | enum ib_cm_sidr_status status, |
| 2387 | const void *private_data, int private_data_len) |
| 2388 | { |
| 2389 | struct ib_cm_sidr_rep_param rep; |
| 2390 | |
| 2391 | memset(&rep, 0, sizeof rep); |
| 2392 | rep.status = status; |
| 2393 | if (status == IB_SIDR_SUCCESS) { |
| 2394 | rep.qp_num = id_priv->qp_num; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2395 | rep.qkey = id_priv->qkey; |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2396 | } |
| 2397 | rep.private_data = private_data; |
| 2398 | rep.private_data_len = private_data_len; |
| 2399 | |
| 2400 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); |
| 2401 | } |
| 2402 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2403 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
| 2404 | { |
| 2405 | struct rdma_id_private *id_priv; |
| 2406 | int ret; |
| 2407 | |
| 2408 | id_priv = container_of(id, struct rdma_id_private, id); |
| 2409 | if (!cma_comp(id_priv, CMA_CONNECT)) |
| 2410 | return -EINVAL; |
| 2411 | |
| 2412 | if (!id->qp && conn_param) { |
| 2413 | id_priv->qp_num = conn_param->qp_num; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2414 | id_priv->srq = conn_param->srq; |
| 2415 | } |
| 2416 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2417 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 2418 | case RDMA_TRANSPORT_IB: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2419 | if (cma_is_ud_ps(id->ps)) |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2420 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
| 2421 | conn_param->private_data, |
| 2422 | conn_param->private_data_len); |
| 2423 | else if (conn_param) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2424 | ret = cma_accept_ib(id_priv, conn_param); |
| 2425 | else |
| 2426 | ret = cma_rep_recv(id_priv); |
| 2427 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2428 | case RDMA_TRANSPORT_IWARP: |
| 2429 | ret = cma_accept_iw(id_priv, conn_param); |
| 2430 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2431 | default: |
| 2432 | ret = -ENOSYS; |
| 2433 | break; |
| 2434 | } |
| 2435 | |
| 2436 | if (ret) |
| 2437 | goto reject; |
| 2438 | |
| 2439 | return 0; |
| 2440 | reject: |
| 2441 | cma_modify_qp_err(id); |
| 2442 | rdma_reject(id, NULL, 0); |
| 2443 | return ret; |
| 2444 | } |
| 2445 | EXPORT_SYMBOL(rdma_accept); |
| 2446 | |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 2447 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
| 2448 | { |
| 2449 | struct rdma_id_private *id_priv; |
| 2450 | int ret; |
| 2451 | |
| 2452 | id_priv = container_of(id, struct rdma_id_private, id); |
Sean Hefty | 6c719f5 | 2007-05-07 11:49:27 -0700 | [diff] [blame] | 2453 | if (!cma_has_cm_dev(id_priv)) |
Sean Hefty | 0fe313b | 2006-11-30 16:37:15 -0800 | [diff] [blame] | 2454 | return -EINVAL; |
| 2455 | |
| 2456 | switch (id->device->node_type) { |
| 2457 | case RDMA_NODE_IB_CA: |
| 2458 | ret = ib_cm_notify(id_priv->cm_id.ib, event); |
| 2459 | break; |
| 2460 | default: |
| 2461 | ret = 0; |
| 2462 | break; |
| 2463 | } |
| 2464 | return ret; |
| 2465 | } |
| 2466 | EXPORT_SYMBOL(rdma_notify); |
| 2467 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2468 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
| 2469 | u8 private_data_len) |
| 2470 | { |
| 2471 | struct rdma_id_private *id_priv; |
| 2472 | int ret; |
| 2473 | |
| 2474 | id_priv = container_of(id, struct rdma_id_private, id); |
Sean Hefty | 6c719f5 | 2007-05-07 11:49:27 -0700 | [diff] [blame] | 2475 | if (!cma_has_cm_dev(id_priv)) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2476 | return -EINVAL; |
| 2477 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2478 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 2479 | case RDMA_TRANSPORT_IB: |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2480 | if (cma_is_ud_ps(id->ps)) |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2481 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
| 2482 | private_data, private_data_len); |
| 2483 | else |
| 2484 | ret = ib_send_cm_rej(id_priv->cm_id.ib, |
| 2485 | IB_CM_REJ_CONSUMER_DEFINED, NULL, |
| 2486 | 0, private_data, private_data_len); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2487 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2488 | case RDMA_TRANSPORT_IWARP: |
| 2489 | ret = iw_cm_reject(id_priv->cm_id.iw, |
| 2490 | private_data, private_data_len); |
| 2491 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2492 | default: |
| 2493 | ret = -ENOSYS; |
| 2494 | break; |
| 2495 | } |
| 2496 | return ret; |
| 2497 | } |
| 2498 | EXPORT_SYMBOL(rdma_reject); |
| 2499 | |
| 2500 | int rdma_disconnect(struct rdma_cm_id *id) |
| 2501 | { |
| 2502 | struct rdma_id_private *id_priv; |
| 2503 | int ret; |
| 2504 | |
| 2505 | id_priv = container_of(id, struct rdma_id_private, id); |
Sean Hefty | 6c719f5 | 2007-05-07 11:49:27 -0700 | [diff] [blame] | 2506 | if (!cma_has_cm_dev(id_priv)) |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2507 | return -EINVAL; |
| 2508 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2509 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 2510 | case RDMA_TRANSPORT_IB: |
| 2511 | ret = cma_modify_qp_err(id); |
| 2512 | if (ret) |
| 2513 | goto out; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2514 | /* Initiate or respond to a disconnect. */ |
| 2515 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) |
| 2516 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); |
| 2517 | break; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2518 | case RDMA_TRANSPORT_IWARP: |
| 2519 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); |
| 2520 | break; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2521 | default: |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 2522 | ret = -EINVAL; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2523 | break; |
| 2524 | } |
| 2525 | out: |
| 2526 | return ret; |
| 2527 | } |
| 2528 | EXPORT_SYMBOL(rdma_disconnect); |
| 2529 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2530 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
| 2531 | { |
| 2532 | struct rdma_id_private *id_priv; |
| 2533 | struct cma_multicast *mc = multicast->context; |
| 2534 | struct rdma_cm_event event; |
| 2535 | int ret; |
| 2536 | |
| 2537 | id_priv = mc->id_priv; |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2538 | if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) && |
| 2539 | cma_disable_remove(id_priv, CMA_ADDR_RESOLVED)) |
| 2540 | return 0; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2541 | |
| 2542 | if (!status && id_priv->id.qp) |
| 2543 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, |
| 2544 | multicast->rec.mlid); |
| 2545 | |
| 2546 | memset(&event, 0, sizeof event); |
| 2547 | event.status = status; |
| 2548 | event.param.ud.private_data = mc->context; |
| 2549 | if (!status) { |
| 2550 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; |
| 2551 | ib_init_ah_from_mcmember(id_priv->id.device, |
| 2552 | id_priv->id.port_num, &multicast->rec, |
| 2553 | &event.param.ud.ah_attr); |
| 2554 | event.param.ud.qp_num = 0xFFFFFF; |
| 2555 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); |
| 2556 | } else |
| 2557 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; |
| 2558 | |
| 2559 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
| 2560 | if (ret) { |
| 2561 | cma_exch(id_priv, CMA_DESTROYING); |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2562 | cma_enable_remove(id_priv); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2563 | rdma_destroy_id(&id_priv->id); |
| 2564 | return 0; |
| 2565 | } |
Sean Hefty | 8aa0860 | 2007-05-07 11:49:00 -0700 | [diff] [blame] | 2566 | |
| 2567 | cma_enable_remove(id_priv); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2568 | return 0; |
| 2569 | } |
| 2570 | |
| 2571 | static void cma_set_mgid(struct rdma_id_private *id_priv, |
| 2572 | struct sockaddr *addr, union ib_gid *mgid) |
| 2573 | { |
| 2574 | unsigned char mc_map[MAX_ADDR_LEN]; |
| 2575 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
| 2576 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; |
| 2577 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; |
| 2578 | |
| 2579 | if (cma_any_addr(addr)) { |
| 2580 | memset(mgid, 0, sizeof *mgid); |
| 2581 | } else if ((addr->sa_family == AF_INET6) && |
| 2582 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) == |
| 2583 | 0xFF10A01B)) { |
| 2584 | /* IPv6 address is an SA assigned MGID. */ |
| 2585 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); |
| 2586 | } else { |
| 2587 | ip_ib_mc_map(sin->sin_addr.s_addr, mc_map); |
| 2588 | if (id_priv->id.ps == RDMA_PS_UDP) |
| 2589 | mc_map[7] = 0x01; /* Use RDMA CM signature */ |
| 2590 | mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8; |
| 2591 | mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr); |
| 2592 | *mgid = *(union ib_gid *) (mc_map + 4); |
| 2593 | } |
| 2594 | } |
| 2595 | |
| 2596 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, |
| 2597 | struct cma_multicast *mc) |
| 2598 | { |
| 2599 | struct ib_sa_mcmember_rec rec; |
| 2600 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
| 2601 | ib_sa_comp_mask comp_mask; |
| 2602 | int ret; |
| 2603 | |
| 2604 | ib_addr_get_mgid(dev_addr, &rec.mgid); |
| 2605 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, |
| 2606 | &rec.mgid, &rec); |
| 2607 | if (ret) |
| 2608 | return ret; |
| 2609 | |
| 2610 | cma_set_mgid(id_priv, &mc->addr, &rec.mgid); |
| 2611 | if (id_priv->id.ps == RDMA_PS_UDP) |
| 2612 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); |
| 2613 | ib_addr_get_sgid(dev_addr, &rec.port_gid); |
| 2614 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
| 2615 | rec.join_state = 1; |
| 2616 | |
| 2617 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | |
| 2618 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | |
| 2619 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | |
| 2620 | IB_SA_MCMEMBER_REC_FLOW_LABEL | |
| 2621 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; |
| 2622 | |
| 2623 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, |
| 2624 | id_priv->id.port_num, &rec, |
| 2625 | comp_mask, GFP_KERNEL, |
| 2626 | cma_ib_mc_handler, mc); |
| 2627 | if (IS_ERR(mc->multicast.ib)) |
| 2628 | return PTR_ERR(mc->multicast.ib); |
| 2629 | |
| 2630 | return 0; |
| 2631 | } |
| 2632 | |
| 2633 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, |
| 2634 | void *context) |
| 2635 | { |
| 2636 | struct rdma_id_private *id_priv; |
| 2637 | struct cma_multicast *mc; |
| 2638 | int ret; |
| 2639 | |
| 2640 | id_priv = container_of(id, struct rdma_id_private, id); |
| 2641 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && |
| 2642 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) |
| 2643 | return -EINVAL; |
| 2644 | |
| 2645 | mc = kmalloc(sizeof *mc, GFP_KERNEL); |
| 2646 | if (!mc) |
| 2647 | return -ENOMEM; |
| 2648 | |
| 2649 | memcpy(&mc->addr, addr, ip_addr_size(addr)); |
| 2650 | mc->context = context; |
| 2651 | mc->id_priv = id_priv; |
| 2652 | |
| 2653 | spin_lock(&id_priv->lock); |
| 2654 | list_add(&mc->list, &id_priv->mc_list); |
| 2655 | spin_unlock(&id_priv->lock); |
| 2656 | |
| 2657 | switch (rdma_node_get_transport(id->device->node_type)) { |
| 2658 | case RDMA_TRANSPORT_IB: |
| 2659 | ret = cma_join_ib_multicast(id_priv, mc); |
| 2660 | break; |
| 2661 | default: |
| 2662 | ret = -ENOSYS; |
| 2663 | break; |
| 2664 | } |
| 2665 | |
| 2666 | if (ret) { |
| 2667 | spin_lock_irq(&id_priv->lock); |
| 2668 | list_del(&mc->list); |
| 2669 | spin_unlock_irq(&id_priv->lock); |
| 2670 | kfree(mc); |
| 2671 | } |
| 2672 | return ret; |
| 2673 | } |
| 2674 | EXPORT_SYMBOL(rdma_join_multicast); |
| 2675 | |
| 2676 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) |
| 2677 | { |
| 2678 | struct rdma_id_private *id_priv; |
| 2679 | struct cma_multicast *mc; |
| 2680 | |
| 2681 | id_priv = container_of(id, struct rdma_id_private, id); |
| 2682 | spin_lock_irq(&id_priv->lock); |
| 2683 | list_for_each_entry(mc, &id_priv->mc_list, list) { |
| 2684 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { |
| 2685 | list_del(&mc->list); |
| 2686 | spin_unlock_irq(&id_priv->lock); |
| 2687 | |
| 2688 | if (id->qp) |
| 2689 | ib_detach_mcast(id->qp, |
| 2690 | &mc->multicast.ib->rec.mgid, |
| 2691 | mc->multicast.ib->rec.mlid); |
| 2692 | ib_sa_free_multicast(mc->multicast.ib); |
| 2693 | kfree(mc); |
| 2694 | return; |
| 2695 | } |
| 2696 | } |
| 2697 | spin_unlock_irq(&id_priv->lock); |
| 2698 | } |
| 2699 | EXPORT_SYMBOL(rdma_leave_multicast); |
| 2700 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2701 | static void cma_add_one(struct ib_device *device) |
| 2702 | { |
| 2703 | struct cma_device *cma_dev; |
| 2704 | struct rdma_id_private *id_priv; |
| 2705 | |
| 2706 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); |
| 2707 | if (!cma_dev) |
| 2708 | return; |
| 2709 | |
| 2710 | cma_dev->device = device; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2711 | |
| 2712 | init_completion(&cma_dev->comp); |
| 2713 | atomic_set(&cma_dev->refcount, 1); |
| 2714 | INIT_LIST_HEAD(&cma_dev->id_list); |
| 2715 | ib_set_client_data(device, &cma_client, cma_dev); |
| 2716 | |
| 2717 | mutex_lock(&lock); |
| 2718 | list_add_tail(&cma_dev->list, &dev_list); |
| 2719 | list_for_each_entry(id_priv, &listen_any_list, list) |
| 2720 | cma_listen_on_dev(id_priv, cma_dev); |
| 2721 | mutex_unlock(&lock); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2722 | } |
| 2723 | |
| 2724 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) |
| 2725 | { |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 2726 | struct rdma_cm_event event; |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2727 | enum cma_state state; |
| 2728 | |
| 2729 | /* Record that we want to remove the device */ |
| 2730 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); |
| 2731 | if (state == CMA_DESTROYING) |
| 2732 | return 0; |
| 2733 | |
| 2734 | cma_cancel_operation(id_priv, state); |
| 2735 | wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove)); |
| 2736 | |
| 2737 | /* Check for destruction from another callback. */ |
| 2738 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) |
| 2739 | return 0; |
| 2740 | |
Sean Hefty | a1b1b61 | 2006-11-30 16:33:14 -0800 | [diff] [blame] | 2741 | memset(&event, 0, sizeof event); |
| 2742 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; |
| 2743 | return id_priv->id.event_handler(&id_priv->id, &event); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2744 | } |
| 2745 | |
| 2746 | static void cma_process_remove(struct cma_device *cma_dev) |
| 2747 | { |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2748 | struct rdma_id_private *id_priv; |
| 2749 | int ret; |
| 2750 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2751 | mutex_lock(&lock); |
| 2752 | while (!list_empty(&cma_dev->id_list)) { |
| 2753 | id_priv = list_entry(cma_dev->id_list.next, |
| 2754 | struct rdma_id_private, list); |
| 2755 | |
| 2756 | if (cma_internal_listen(id_priv)) { |
| 2757 | cma_destroy_listen(id_priv); |
| 2758 | continue; |
| 2759 | } |
| 2760 | |
Krishna Kumar | 94de178 | 2006-09-29 12:03:35 -0700 | [diff] [blame] | 2761 | list_del_init(&id_priv->list); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2762 | atomic_inc(&id_priv->refcount); |
| 2763 | mutex_unlock(&lock); |
| 2764 | |
| 2765 | ret = cma_remove_id_dev(id_priv); |
| 2766 | cma_deref_id(id_priv); |
| 2767 | if (ret) |
| 2768 | rdma_destroy_id(&id_priv->id); |
| 2769 | |
| 2770 | mutex_lock(&lock); |
| 2771 | } |
| 2772 | mutex_unlock(&lock); |
| 2773 | |
| 2774 | cma_deref_dev(cma_dev); |
| 2775 | wait_for_completion(&cma_dev->comp); |
| 2776 | } |
| 2777 | |
| 2778 | static void cma_remove_one(struct ib_device *device) |
| 2779 | { |
| 2780 | struct cma_device *cma_dev; |
| 2781 | |
| 2782 | cma_dev = ib_get_client_data(device, &cma_client); |
| 2783 | if (!cma_dev) |
| 2784 | return; |
| 2785 | |
| 2786 | mutex_lock(&lock); |
| 2787 | list_del(&cma_dev->list); |
| 2788 | mutex_unlock(&lock); |
| 2789 | |
| 2790 | cma_process_remove(cma_dev); |
| 2791 | kfree(cma_dev); |
| 2792 | } |
| 2793 | |
| 2794 | static int cma_init(void) |
| 2795 | { |
| 2796 | int ret; |
| 2797 | |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 2798 | get_random_bytes(&next_port, sizeof next_port); |
Sean Hefty | bf2944b | 2007-06-05 09:57:31 -0700 | [diff] [blame] | 2799 | next_port = ((unsigned int) next_port % |
| 2800 | (sysctl_local_port_range[1] - sysctl_local_port_range[0])) + |
Sean Hefty | aedec08 | 2007-01-29 16:41:23 -0800 | [diff] [blame] | 2801 | sysctl_local_port_range[0]; |
Sean Hefty | c7f743a | 2007-02-01 12:23:37 -0800 | [diff] [blame] | 2802 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2803 | if (!cma_wq) |
| 2804 | return -ENOMEM; |
| 2805 | |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 2806 | ib_sa_register_client(&sa_client); |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 2807 | rdma_addr_register_client(&addr_client); |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 2808 | |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2809 | ret = ib_register_client(&cma_client); |
| 2810 | if (ret) |
| 2811 | goto err; |
| 2812 | return 0; |
| 2813 | |
| 2814 | err: |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 2815 | rdma_addr_unregister_client(&addr_client); |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 2816 | ib_sa_unregister_client(&sa_client); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2817 | destroy_workqueue(cma_wq); |
| 2818 | return ret; |
| 2819 | } |
| 2820 | |
| 2821 | static void cma_cleanup(void) |
| 2822 | { |
| 2823 | ib_unregister_client(&cma_client); |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 2824 | rdma_addr_unregister_client(&addr_client); |
Michael S. Tsirkin | c1a0b23 | 2006-08-21 16:40:12 -0700 | [diff] [blame] | 2825 | ib_sa_unregister_client(&sa_client); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2826 | destroy_workqueue(cma_wq); |
| 2827 | idr_destroy(&sdp_ps); |
| 2828 | idr_destroy(&tcp_ps); |
Sean Hefty | 628e5f6 | 2006-11-30 16:44:16 -0800 | [diff] [blame] | 2829 | idr_destroy(&udp_ps); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 2830 | idr_destroy(&ipoib_ps); |
Sean Hefty | e51060f | 2006-06-17 20:37:29 -0700 | [diff] [blame] | 2831 | } |
| 2832 | |
| 2833 | module_init(cma_init); |
| 2834 | module_exit(cma_cleanup); |