~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/rds/ib.c

Version: ~ [ linux-5.1-rc1 ] ~ [ linux-5.0.3 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.30 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.107 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.164 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.176 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.136 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.63 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved.
  3  *
  4  * This software is available to you under a choice of one of two
  5  * licenses.  You may choose to be licensed under the terms of the GNU
  6  * General Public License (GPL) Version 2, available from the file
  7  * COPYING in the main directory of this source tree, or the
  8  * OpenIB.org BSD license below:
  9  *
 10  *     Redistribution and use in source and binary forms, with or
 11  *     without modification, are permitted provided that the following
 12  *     conditions are met:
 13  *
 14  *      - Redistributions of source code must retain the above
 15  *        copyright notice, this list of conditions and the following
 16  *        disclaimer.
 17  *
 18  *      - Redistributions in binary form must reproduce the above
 19  *        copyright notice, this list of conditions and the following
 20  *        disclaimer in the documentation and/or other materials
 21  *        provided with the distribution.
 22  *
 23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30  * SOFTWARE.
 31  *
 32  */
 33 #include <linux/kernel.h>
 34 #include <linux/in.h>
 35 #include <linux/if.h>
 36 #include <linux/netdevice.h>
 37 #include <linux/inetdevice.h>
 38 #include <linux/if_arp.h>
 39 #include <linux/delay.h>
 40 #include <linux/slab.h>
 41 #include <linux/module.h>
 42 #include <net/addrconf.h>
 43 
 44 #include "rds_single_path.h"
 45 #include "rds.h"
 46 #include "ib.h"
 47 #include "ib_mr.h"
 48 
 49 static unsigned int rds_ib_mr_1m_pool_size = RDS_MR_1M_POOL_SIZE;
 50 static unsigned int rds_ib_mr_8k_pool_size = RDS_MR_8K_POOL_SIZE;
 51 unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT;
 52 static atomic_t rds_ib_unloading;
 53 
 54 module_param(rds_ib_mr_1m_pool_size, int, 0444);
 55 MODULE_PARM_DESC(rds_ib_mr_1m_pool_size, " Max number of 1M mr per HCA");
 56 module_param(rds_ib_mr_8k_pool_size, int, 0444);
 57 MODULE_PARM_DESC(rds_ib_mr_8k_pool_size, " Max number of 8K mr per HCA");
 58 module_param(rds_ib_retry_count, int, 0444);
 59 MODULE_PARM_DESC(rds_ib_retry_count, " Number of hw retries before reporting an error");
 60 
 61 /*
 62  * we have a clumsy combination of RCU and a rwsem protecting this list
 63  * because it is used both in the get_mr fast path and while blocking in
 64  * the FMR flushing path.
 65  */
 66 DECLARE_RWSEM(rds_ib_devices_lock);
 67 struct list_head rds_ib_devices;
 68 
 69 /* NOTE: if also grabbing ibdev lock, grab this first */
 70 DEFINE_SPINLOCK(ib_nodev_conns_lock);
 71 LIST_HEAD(ib_nodev_conns);
 72 
 73 static void rds_ib_nodev_connect(void)
 74 {
 75         struct rds_ib_connection *ic;
 76 
 77         spin_lock(&ib_nodev_conns_lock);
 78         list_for_each_entry(ic, &ib_nodev_conns, ib_node)
 79                 rds_conn_connect_if_down(ic->conn);
 80         spin_unlock(&ib_nodev_conns_lock);
 81 }
 82 
 83 static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev)
 84 {
 85         struct rds_ib_connection *ic;
 86         unsigned long flags;
 87 
 88         spin_lock_irqsave(&rds_ibdev->spinlock, flags);
 89         list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node)
 90                 rds_conn_drop(ic->conn);
 91         spin_unlock_irqrestore(&rds_ibdev->spinlock, flags);
 92 }
 93 
 94 /*
 95  * rds_ib_destroy_mr_pool() blocks on a few things and mrs drop references
 96  * from interrupt context so we push freing off into a work struct in krdsd.
 97  */
 98 static void rds_ib_dev_free(struct work_struct *work)
 99 {
100         struct rds_ib_ipaddr *i_ipaddr, *i_next;
101         struct rds_ib_device *rds_ibdev = container_of(work,
102                                         struct rds_ib_device, free_work);
103 
104         if (rds_ibdev->mr_8k_pool)
105                 rds_ib_destroy_mr_pool(rds_ibdev->mr_8k_pool);
106         if (rds_ibdev->mr_1m_pool)
107                 rds_ib_destroy_mr_pool(rds_ibdev->mr_1m_pool);
108         if (rds_ibdev->pd)
109                 ib_dealloc_pd(rds_ibdev->pd);
110 
111         list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) {
112                 list_del(&i_ipaddr->list);
113                 kfree(i_ipaddr);
114         }
115 
116         kfree(rds_ibdev->vector_load);
117 
118         kfree(rds_ibdev);
119 }
120 
121 void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
122 {
123         BUG_ON(refcount_read(&rds_ibdev->refcount) == 0);
124         if (refcount_dec_and_test(&rds_ibdev->refcount))
125                 queue_work(rds_wq, &rds_ibdev->free_work);
126 }
127 
128 static void rds_ib_add_one(struct ib_device *device)
129 {
130         struct rds_ib_device *rds_ibdev;
131         bool has_fr, has_fmr;
132 
133         /* Only handle IB (no iWARP) devices */
134         if (device->node_type != RDMA_NODE_IB_CA)
135                 return;
136 
137         rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL,
138                                  ibdev_to_node(device));
139         if (!rds_ibdev)
140                 return;
141 
142         spin_lock_init(&rds_ibdev->spinlock);
143         refcount_set(&rds_ibdev->refcount, 1);
144         INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free);
145 
146         rds_ibdev->max_wrs = device->attrs.max_qp_wr;
147         rds_ibdev->max_sge = min(device->attrs.max_send_sge, RDS_IB_MAX_SGE);
148 
149         has_fr = (device->attrs.device_cap_flags &
150                   IB_DEVICE_MEM_MGT_EXTENSIONS);
151         has_fmr = (device->ops.alloc_fmr && device->ops.dealloc_fmr &&
152                    device->ops.map_phys_fmr && device->ops.unmap_fmr);
153         rds_ibdev->use_fastreg = (has_fr && !has_fmr);
154 
155         rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32;
156         rds_ibdev->max_1m_mrs = device->attrs.max_mr ?
157                 min_t(unsigned int, (device->attrs.max_mr / 2),
158                       rds_ib_mr_1m_pool_size) : rds_ib_mr_1m_pool_size;
159 
160         rds_ibdev->max_8k_mrs = device->attrs.max_mr ?
161                 min_t(unsigned int, ((device->attrs.max_mr / 2) * RDS_MR_8K_SCALE),
162                       rds_ib_mr_8k_pool_size) : rds_ib_mr_8k_pool_size;
163 
164         rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom;
165         rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom;
166 
167         rds_ibdev->vector_load = kcalloc(device->num_comp_vectors,
168                                          sizeof(int),
169                                          GFP_KERNEL);
170         if (!rds_ibdev->vector_load) {
171                 pr_err("RDS/IB: %s failed to allocate vector memory\n",
172                         __func__);
173                 goto put_dev;
174         }
175 
176         rds_ibdev->dev = device;
177         rds_ibdev->pd = ib_alloc_pd(device, 0);
178         if (IS_ERR(rds_ibdev->pd)) {
179                 rds_ibdev->pd = NULL;
180                 goto put_dev;
181         }
182 
183         rds_ibdev->mr_1m_pool =
184                 rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_1M_POOL);
185         if (IS_ERR(rds_ibdev->mr_1m_pool)) {
186                 rds_ibdev->mr_1m_pool = NULL;
187                 goto put_dev;
188         }
189 
190         rds_ibdev->mr_8k_pool =
191                 rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_8K_POOL);
192         if (IS_ERR(rds_ibdev->mr_8k_pool)) {
193                 rds_ibdev->mr_8k_pool = NULL;
194                 goto put_dev;
195         }
196 
197         rdsdebug("RDS/IB: max_mr = %d, max_wrs = %d, max_sge = %d, fmr_max_remaps = %d, max_1m_mrs = %d, max_8k_mrs = %d\n",
198                  device->attrs.max_fmr, rds_ibdev->max_wrs, rds_ibdev->max_sge,
199                  rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs,
200                  rds_ibdev->max_8k_mrs);
201 
202         pr_info("RDS/IB: %s: %s supported and preferred\n",
203                 device->name,
204                 rds_ibdev->use_fastreg ? "FRMR" : "FMR");
205 
206         INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
207         INIT_LIST_HEAD(&rds_ibdev->conn_list);
208 
209         down_write(&rds_ib_devices_lock);
210         list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices);
211         up_write(&rds_ib_devices_lock);
212         refcount_inc(&rds_ibdev->refcount);
213 
214         ib_set_client_data(device, &rds_ib_client, rds_ibdev);
215         refcount_inc(&rds_ibdev->refcount);
216 
217         rds_ib_nodev_connect();
218 
219 put_dev:
220         rds_ib_dev_put(rds_ibdev);
221 }
222 
223 /*
224  * New connections use this to find the device to associate with the
225  * connection.  It's not in the fast path so we're not concerned about the
226  * performance of the IB call.  (As of this writing, it uses an interrupt
227  * blocking spinlock to serialize walking a per-device list of all registered
228  * clients.)
229  *
230  * RCU is used to handle incoming connections racing with device teardown.
231  * Rather than use a lock to serialize removal from the client_data and
232  * getting a new reference, we use an RCU grace period.  The destruction
233  * path removes the device from client_data and then waits for all RCU
234  * readers to finish.
235  *
236  * A new connection can get NULL from this if its arriving on a
237  * device that is in the process of being removed.
238  */
239 struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device)
240 {
241         struct rds_ib_device *rds_ibdev;
242 
243         rcu_read_lock();
244         rds_ibdev = ib_get_client_data(device, &rds_ib_client);
245         if (rds_ibdev)
246                 refcount_inc(&rds_ibdev->refcount);
247         rcu_read_unlock();
248         return rds_ibdev;
249 }
250 
251 /*
252  * The IB stack is letting us know that a device is going away.  This can
253  * happen if the underlying HCA driver is removed or if PCI hotplug is removing
254  * the pci function, for example.
255  *
256  * This can be called at any time and can be racing with any other RDS path.
257  */
258 static void rds_ib_remove_one(struct ib_device *device, void *client_data)
259 {
260         struct rds_ib_device *rds_ibdev = client_data;
261 
262         if (!rds_ibdev)
263                 return;
264 
265         rds_ib_dev_shutdown(rds_ibdev);
266 
267         /* stop connection attempts from getting a reference to this device. */
268         ib_set_client_data(device, &rds_ib_client, NULL);
269 
270         down_write(&rds_ib_devices_lock);
271         list_del_rcu(&rds_ibdev->list);
272         up_write(&rds_ib_devices_lock);
273 
274         /*
275          * This synchronize rcu is waiting for readers of both the ib
276          * client data and the devices list to finish before we drop
277          * both of those references.
278          */
279         synchronize_rcu();
280         rds_ib_dev_put(rds_ibdev);
281         rds_ib_dev_put(rds_ibdev);
282 }
283 
284 struct ib_client rds_ib_client = {
285         .name   = "rds_ib",
286         .add    = rds_ib_add_one,
287         .remove = rds_ib_remove_one
288 };
289 
290 static int rds_ib_conn_info_visitor(struct rds_connection *conn,
291                                     void *buffer)
292 {
293         struct rds_info_rdma_connection *iinfo = buffer;
294         struct rds_ib_connection *ic;
295 
296         /* We will only ever look at IB transports */
297         if (conn->c_trans != &rds_ib_transport)
298                 return 0;
299         if (conn->c_isv6)
300                 return 0;
301 
302         iinfo->src_addr = conn->c_laddr.s6_addr32[3];
303         iinfo->dst_addr = conn->c_faddr.s6_addr32[3];
304         iinfo->tos = conn->c_tos;
305 
306         memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
307         memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
308         if (rds_conn_state(conn) == RDS_CONN_UP) {
309                 struct rds_ib_device *rds_ibdev;
310 
311                 ic = conn->c_transport_data;
312 
313                 rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo->src_gid,
314                                (union ib_gid *)&iinfo->dst_gid);
315 
316                 rds_ibdev = ic->rds_ibdev;
317                 iinfo->max_send_wr = ic->i_send_ring.w_nr;
318                 iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
319                 iinfo->max_send_sge = rds_ibdev->max_sge;
320                 rds_ib_get_mr_info(rds_ibdev, iinfo);
321         }
322         return 1;
323 }
324 
325 #if IS_ENABLED(CONFIG_IPV6)
326 /* IPv6 version of rds_ib_conn_info_visitor(). */
327 static int rds6_ib_conn_info_visitor(struct rds_connection *conn,
328                                      void *buffer)
329 {
330         struct rds6_info_rdma_connection *iinfo6 = buffer;
331         struct rds_ib_connection *ic;
332 
333         /* We will only ever look at IB transports */
334         if (conn->c_trans != &rds_ib_transport)
335                 return 0;
336 
337         iinfo6->src_addr = conn->c_laddr;
338         iinfo6->dst_addr = conn->c_faddr;
339 
340         memset(&iinfo6->src_gid, 0, sizeof(iinfo6->src_gid));
341         memset(&iinfo6->dst_gid, 0, sizeof(iinfo6->dst_gid));
342 
343         if (rds_conn_state(conn) == RDS_CONN_UP) {
344                 struct rds_ib_device *rds_ibdev;
345 
346                 ic = conn->c_transport_data;
347                 rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo6->src_gid,
348                                (union ib_gid *)&iinfo6->dst_gid);
349                 rds_ibdev = ic->rds_ibdev;
350                 iinfo6->max_send_wr = ic->i_send_ring.w_nr;
351                 iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;
352                 iinfo6->max_send_sge = rds_ibdev->max_sge;
353                 rds6_ib_get_mr_info(rds_ibdev, iinfo6);
354         }
355         return 1;
356 }
357 #endif
358 
359 static void rds_ib_ic_info(struct socket *sock, unsigned int len,
360                            struct rds_info_iterator *iter,
361                            struct rds_info_lengths *lens)
362 {
363         u64 buffer[(sizeof(struct rds_info_rdma_connection) + 7) / 8];
364 
365         rds_for_each_conn_info(sock, len, iter, lens,
366                                 rds_ib_conn_info_visitor,
367                                 buffer,
368                                 sizeof(struct rds_info_rdma_connection));
369 }
370 
371 #if IS_ENABLED(CONFIG_IPV6)
372 /* IPv6 version of rds_ib_ic_info(). */
373 static void rds6_ib_ic_info(struct socket *sock, unsigned int len,
374                             struct rds_info_iterator *iter,
375                             struct rds_info_lengths *lens)
376 {
377         u64 buffer[(sizeof(struct rds6_info_rdma_connection) + 7) / 8];
378 
379         rds_for_each_conn_info(sock, len, iter, lens,
380                                rds6_ib_conn_info_visitor,
381                                buffer,
382                                sizeof(struct rds6_info_rdma_connection));
383 }
384 #endif
385 
386 /*
387  * Early RDS/IB was built to only bind to an address if there is an IPoIB
388  * device with that address set.
389  *
390  * If it were me, I'd advocate for something more flexible.  Sending and
391  * receiving should be device-agnostic.  Transports would try and maintain
392  * connections between peers who have messages queued.  Userspace would be
393  * allowed to influence which paths have priority.  We could call userspace
394  * asserting this policy "routing".
395  */
396 static int rds_ib_laddr_check(struct net *net, const struct in6_addr *addr,
397                               __u32 scope_id)
398 {
399         int ret;
400         struct rdma_cm_id *cm_id;
401 #if IS_ENABLED(CONFIG_IPV6)
402         struct sockaddr_in6 sin6;
403 #endif
404         struct sockaddr_in sin;
405         struct sockaddr *sa;
406         bool isv4;
407 
408         isv4 = ipv6_addr_v4mapped(addr);
409         /* Create a CMA ID and try to bind it. This catches both
410          * IB and iWARP capable NICs.
411          */
412         cm_id = rdma_create_id(&init_net, rds_rdma_cm_event_handler,
413                                NULL, RDMA_PS_TCP, IB_QPT_RC);
414         if (IS_ERR(cm_id))
415                 return PTR_ERR(cm_id);
416 
417         if (isv4) {
418                 memset(&sin, 0, sizeof(sin));
419                 sin.sin_family = AF_INET;
420                 sin.sin_addr.s_addr = addr->s6_addr32[3];
421                 sa = (struct sockaddr *)&sin;
422         } else {
423 #if IS_ENABLED(CONFIG_IPV6)
424                 memset(&sin6, 0, sizeof(sin6));
425                 sin6.sin6_family = AF_INET6;
426                 sin6.sin6_addr = *addr;
427                 sin6.sin6_scope_id = scope_id;
428                 sa = (struct sockaddr *)&sin6;
429 
430                 /* XXX Do a special IPv6 link local address check here.  The
431                  * reason is that rdma_bind_addr() always succeeds with IPv6
432                  * link local address regardless it is indeed configured in a
433                  * system.
434                  */
435                 if (ipv6_addr_type(addr) & IPV6_ADDR_LINKLOCAL) {
436                         struct net_device *dev;
437 
438                         if (scope_id == 0) {
439                                 ret = -EADDRNOTAVAIL;
440                                 goto out;
441                         }
442 
443                         /* Use init_net for now as RDS is not network
444                          * name space aware.
445                          */
446                         dev = dev_get_by_index(&init_net, scope_id);
447                         if (!dev) {
448                                 ret = -EADDRNOTAVAIL;
449                                 goto out;
450                         }
451                         if (!ipv6_chk_addr(&init_net, addr, dev, 1)) {
452                                 dev_put(dev);
453                                 ret = -EADDRNOTAVAIL;
454                                 goto out;
455                         }
456                         dev_put(dev);
457                 }
458 #else
459                 ret = -EADDRNOTAVAIL;
460                 goto out;
461 #endif
462         }
463 
464         /* rdma_bind_addr will only succeed for IB & iWARP devices */
465         ret = rdma_bind_addr(cm_id, sa);
466         /* due to this, we will claim to support iWARP devices unless we
467            check node_type. */
468         if (ret || !cm_id->device ||
469             cm_id->device->node_type != RDMA_NODE_IB_CA)
470                 ret = -EADDRNOTAVAIL;
471 
472         rdsdebug("addr %pI6c%%%u ret %d node type %d\n",
473                  addr, scope_id, ret,
474                  cm_id->device ? cm_id->device->node_type : -1);
475 
476 out:
477         rdma_destroy_id(cm_id);
478 
479         return ret;
480 }
481 
482 static void rds_ib_unregister_client(void)
483 {
484         ib_unregister_client(&rds_ib_client);
485         /* wait for rds_ib_dev_free() to complete */
486         flush_workqueue(rds_wq);
487 }
488 
489 static void rds_ib_set_unloading(void)
490 {
491         atomic_set(&rds_ib_unloading, 1);
492 }
493 
494 static bool rds_ib_is_unloading(struct rds_connection *conn)
495 {
496         struct rds_conn_path *cp = &conn->c_path[0];
497 
498         return (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags) ||
499                 atomic_read(&rds_ib_unloading) != 0);
500 }
501 
502 void rds_ib_exit(void)
503 {
504         rds_ib_set_unloading();
505         synchronize_rcu();
506         rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
507 #if IS_ENABLED(CONFIG_IPV6)
508         rds_info_deregister_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
509 #endif
510         rds_ib_unregister_client();
511         rds_ib_destroy_nodev_conns();
512         rds_ib_sysctl_exit();
513         rds_ib_recv_exit();
514         rds_trans_unregister(&rds_ib_transport);
515         rds_ib_mr_exit();
516 }
517 
518 static u8 rds_ib_get_tos_map(u8 tos)
519 {
520         /* 1:1 user to transport map for RDMA transport.
521          * In future, if custom map is desired, hook can export
522          * user configurable map.
523          */
524         return tos;
525 }
526 
527 struct rds_transport rds_ib_transport = {
528         .laddr_check            = rds_ib_laddr_check,
529         .xmit_path_complete     = rds_ib_xmit_path_complete,
530         .xmit                   = rds_ib_xmit,
531         .xmit_rdma              = rds_ib_xmit_rdma,
532         .xmit_atomic            = rds_ib_xmit_atomic,
533         .recv_path              = rds_ib_recv_path,
534         .conn_alloc             = rds_ib_conn_alloc,
535         .conn_free              = rds_ib_conn_free,
536         .conn_path_connect      = rds_ib_conn_path_connect,
537         .conn_path_shutdown     = rds_ib_conn_path_shutdown,
538         .inc_copy_to_user       = rds_ib_inc_copy_to_user,
539         .inc_free               = rds_ib_inc_free,
540         .cm_initiate_connect    = rds_ib_cm_initiate_connect,
541         .cm_handle_connect      = rds_ib_cm_handle_connect,
542         .cm_connect_complete    = rds_ib_cm_connect_complete,
543         .stats_info_copy        = rds_ib_stats_info_copy,
544         .exit                   = rds_ib_exit,
545         .get_mr                 = rds_ib_get_mr,
546         .sync_mr                = rds_ib_sync_mr,
547         .free_mr                = rds_ib_free_mr,
548         .flush_mrs              = rds_ib_flush_mrs,
549         .get_tos_map            = rds_ib_get_tos_map,
550         .t_owner                = THIS_MODULE,
551         .t_name                 = "infiniband",
552         .t_unloading            = rds_ib_is_unloading,
553         .t_type                 = RDS_TRANS_IB
554 };
555 
556 int rds_ib_init(void)
557 {
558         int ret;
559 
560         INIT_LIST_HEAD(&rds_ib_devices);
561 
562         ret = rds_ib_mr_init();
563         if (ret)
564                 goto out;
565 
566         ret = ib_register_client(&rds_ib_client);
567         if (ret)
568                 goto out_mr_exit;
569 
570         ret = rds_ib_sysctl_init();
571         if (ret)
572                 goto out_ibreg;
573 
574         ret = rds_ib_recv_init();
575         if (ret)
576                 goto out_sysctl;
577 
578         rds_trans_register(&rds_ib_transport);
579 
580         rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
581 #if IS_ENABLED(CONFIG_IPV6)
582         rds_info_register_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
583 #endif
584 
585         goto out;
586 
587 out_sysctl:
588         rds_ib_sysctl_exit();
589 out_ibreg:
590         rds_ib_unregister_client();
591 out_mr_exit:
592         rds_ib_mr_exit();
593 out:
594         return ret;
595 }
596 
597 MODULE_LICENSE("GPL");
598 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp