2 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
33 #include <linux/completion.h>
34 #include <linux/mutex.h>
35 #include <linux/poll.h>
36 #include <linux/idr.h>
38 #include <linux/in6.h>
39 #include <linux/miscdevice.h>
41 #include <rdma/rdma_user_cm.h>
42 #include <rdma/ib_marshall.h>
43 #include <rdma/rdma_cm.h>
45 MODULE_AUTHOR("Sean Hefty");
46 MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
47 MODULE_LICENSE("Dual BSD/GPL");
50 UCMA_MAX_BACKLOG = 128
56 struct list_head ctx_list;
57 struct list_head event_list;
58 wait_queue_head_t poll_wait;
63 struct completion comp;
68 struct ucma_file *file;
69 struct rdma_cm_id *cm_id;
72 struct list_head list;
73 struct list_head mc_list;
76 struct ucma_multicast {
77 struct ucma_context *ctx;
82 struct list_head list;
84 u8 pad[sizeof(struct sockaddr_in6) -
85 sizeof(struct sockaddr)];
89 struct ucma_context *ctx;
90 struct ucma_multicast *mc;
91 struct list_head list;
92 struct rdma_cm_id *cm_id;
93 struct rdma_ucm_event_resp resp;
96 static DEFINE_MUTEX(mut);
97 static DEFINE_IDR(ctx_idr);
98 static DEFINE_IDR(multicast_idr);
100 static inline struct ucma_context *_ucma_find_context(int id,
101 struct ucma_file *file)
103 struct ucma_context *ctx;
105 ctx = idr_find(&ctx_idr, id);
107 ctx = ERR_PTR(-ENOENT);
108 else if (ctx->file != file)
109 ctx = ERR_PTR(-EINVAL);
113 static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id)
115 struct ucma_context *ctx;
118 ctx = _ucma_find_context(id, file);
120 atomic_inc(&ctx->ref);
125 static void ucma_put_ctx(struct ucma_context *ctx)
127 if (atomic_dec_and_test(&ctx->ref))
128 complete(&ctx->comp);
131 static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
133 struct ucma_context *ctx;
136 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
140 atomic_set(&ctx->ref, 1);
141 init_completion(&ctx->comp);
142 INIT_LIST_HEAD(&ctx->mc_list);
146 ret = idr_pre_get(&ctx_idr, GFP_KERNEL);
151 ret = idr_get_new(&ctx_idr, ctx, &ctx->id);
153 } while (ret == -EAGAIN);
158 list_add_tail(&ctx->list, &file->ctx_list);
166 static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx)
168 struct ucma_multicast *mc;
171 mc = kzalloc(sizeof(*mc), GFP_KERNEL);
176 ret = idr_pre_get(&multicast_idr, GFP_KERNEL);
181 ret = idr_get_new(&multicast_idr, mc, &mc->id);
183 } while (ret == -EAGAIN);
189 list_add_tail(&mc->list, &ctx->mc_list);
197 static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
198 struct rdma_conn_param *src)
200 if (src->private_data_len)
201 memcpy(dst->private_data, src->private_data,
202 src->private_data_len);
203 dst->private_data_len = src->private_data_len;
204 dst->responder_resources =src->responder_resources;
205 dst->initiator_depth = src->initiator_depth;
206 dst->flow_control = src->flow_control;
207 dst->retry_count = src->retry_count;
208 dst->rnr_retry_count = src->rnr_retry_count;
210 dst->qp_num = src->qp_num;
213 static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst,
214 struct rdma_ud_param *src)
216 if (src->private_data_len)
217 memcpy(dst->private_data, src->private_data,
218 src->private_data_len);
219 dst->private_data_len = src->private_data_len;
220 ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
221 dst->qp_num = src->qp_num;
222 dst->qkey = src->qkey;
225 static void ucma_set_event_context(struct ucma_context *ctx,
226 struct rdma_cm_event *event,
227 struct ucma_event *uevent)
230 switch (event->event) {
231 case RDMA_CM_EVENT_MULTICAST_JOIN:
232 case RDMA_CM_EVENT_MULTICAST_ERROR:
233 uevent->mc = (struct ucma_multicast *)
234 event->param.ud.private_data;
235 uevent->resp.uid = uevent->mc->uid;
236 uevent->resp.id = uevent->mc->id;
239 uevent->resp.uid = ctx->uid;
240 uevent->resp.id = ctx->id;
245 static int ucma_event_handler(struct rdma_cm_id *cm_id,
246 struct rdma_cm_event *event)
248 struct ucma_event *uevent;
249 struct ucma_context *ctx = cm_id->context;
252 uevent = kzalloc(sizeof(*uevent), GFP_KERNEL);
254 return event->event == RDMA_CM_EVENT_CONNECT_REQUEST;
256 uevent->cm_id = cm_id;
257 ucma_set_event_context(ctx, event, uevent);
258 uevent->resp.event = event->event;
259 uevent->resp.status = event->status;
260 if (cm_id->ps == RDMA_PS_UDP || cm_id->ps == RDMA_PS_IPOIB)
261 ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
263 ucma_copy_conn_event(&uevent->resp.param.conn,
266 mutex_lock(&ctx->file->mut);
267 if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
274 } else if (!ctx->uid) {
276 * We ignore events for new connections until userspace has set
277 * their context. This can only happen if an error occurs on a
278 * new connection before the user accepts it. This is okay,
279 * since the accept will just fail later.
285 list_add_tail(&uevent->list, &ctx->file->event_list);
286 wake_up_interruptible(&ctx->file->poll_wait);
288 mutex_unlock(&ctx->file->mut);
292 static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf,
293 int in_len, int out_len)
295 struct ucma_context *ctx;
296 struct rdma_ucm_get_event cmd;
297 struct ucma_event *uevent;
301 if (out_len < sizeof uevent->resp)
304 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
307 mutex_lock(&file->mut);
308 while (list_empty(&file->event_list)) {
309 mutex_unlock(&file->mut);
311 if (file->filp->f_flags & O_NONBLOCK)
314 if (wait_event_interruptible(file->poll_wait,
315 !list_empty(&file->event_list)))
318 mutex_lock(&file->mut);
321 uevent = list_entry(file->event_list.next, struct ucma_event, list);
323 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
324 ctx = ucma_alloc_ctx(file);
329 uevent->ctx->backlog++;
330 ctx->cm_id = uevent->cm_id;
331 ctx->cm_id->context = ctx;
332 uevent->resp.id = ctx->id;
335 if (copy_to_user((void __user *)(unsigned long)cmd.response,
336 &uevent->resp, sizeof uevent->resp)) {
341 list_del(&uevent->list);
342 uevent->ctx->events_reported++;
344 uevent->mc->events_reported++;
347 mutex_unlock(&file->mut);
351 static ssize_t ucma_create_id(struct ucma_file *file,
352 const char __user *inbuf,
353 int in_len, int out_len)
355 struct rdma_ucm_create_id cmd;
356 struct rdma_ucm_create_id_resp resp;
357 struct ucma_context *ctx;
360 if (out_len < sizeof(resp))
363 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
366 mutex_lock(&file->mut);
367 ctx = ucma_alloc_ctx(file);
368 mutex_unlock(&file->mut);
373 ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps);
374 if (IS_ERR(ctx->cm_id)) {
375 ret = PTR_ERR(ctx->cm_id);
380 if (copy_to_user((void __user *)(unsigned long)cmd.response,
381 &resp, sizeof(resp))) {
388 rdma_destroy_id(ctx->cm_id);
391 idr_remove(&ctx_idr, ctx->id);
397 static void ucma_cleanup_multicast(struct ucma_context *ctx)
399 struct ucma_multicast *mc, *tmp;
402 list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) {
404 idr_remove(&multicast_idr, mc->id);
410 static void ucma_cleanup_events(struct ucma_context *ctx)
412 struct ucma_event *uevent, *tmp;
414 list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) {
415 if (uevent->ctx != ctx)
418 list_del(&uevent->list);
420 /* clear incoming connections. */
421 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST)
422 rdma_destroy_id(uevent->cm_id);
428 static void ucma_cleanup_mc_events(struct ucma_multicast *mc)
430 struct ucma_event *uevent, *tmp;
432 list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) {
433 if (uevent->mc != mc)
436 list_del(&uevent->list);
441 static int ucma_free_ctx(struct ucma_context *ctx)
445 /* No new events will be generated after destroying the id. */
446 rdma_destroy_id(ctx->cm_id);
448 ucma_cleanup_multicast(ctx);
450 /* Cleanup events not yet reported to the user. */
451 mutex_lock(&ctx->file->mut);
452 ucma_cleanup_events(ctx);
453 list_del(&ctx->list);
454 mutex_unlock(&ctx->file->mut);
456 events_reported = ctx->events_reported;
458 return events_reported;
461 static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf,
462 int in_len, int out_len)
464 struct rdma_ucm_destroy_id cmd;
465 struct rdma_ucm_destroy_id_resp resp;
466 struct ucma_context *ctx;
469 if (out_len < sizeof(resp))
472 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
476 ctx = _ucma_find_context(cmd.id, file);
478 idr_remove(&ctx_idr, ctx->id);
485 wait_for_completion(&ctx->comp);
486 resp.events_reported = ucma_free_ctx(ctx);
488 if (copy_to_user((void __user *)(unsigned long)cmd.response,
489 &resp, sizeof(resp)))
495 static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf,
496 int in_len, int out_len)
498 struct rdma_ucm_bind_addr cmd;
499 struct ucma_context *ctx;
502 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
505 ctx = ucma_get_ctx(file, cmd.id);
509 ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr);
514 static ssize_t ucma_resolve_addr(struct ucma_file *file,
515 const char __user *inbuf,
516 int in_len, int out_len)
518 struct rdma_ucm_resolve_addr cmd;
519 struct ucma_context *ctx;
522 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
525 ctx = ucma_get_ctx(file, cmd.id);
529 ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr,
530 (struct sockaddr *) &cmd.dst_addr,
536 static ssize_t ucma_resolve_route(struct ucma_file *file,
537 const char __user *inbuf,
538 int in_len, int out_len)
540 struct rdma_ucm_resolve_route cmd;
541 struct ucma_context *ctx;
544 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
547 ctx = ucma_get_ctx(file, cmd.id);
551 ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms);
556 static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp,
557 struct rdma_route *route)
559 struct rdma_dev_addr *dev_addr;
561 resp->num_paths = route->num_paths;
562 switch (route->num_paths) {
564 dev_addr = &route->addr.dev_addr;
565 ib_addr_get_dgid(dev_addr,
566 (union ib_gid *) &resp->ib_route[0].dgid);
567 ib_addr_get_sgid(dev_addr,
568 (union ib_gid *) &resp->ib_route[0].sgid);
569 resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
572 ib_copy_path_rec_to_user(&resp->ib_route[1],
573 &route->path_rec[1]);
576 ib_copy_path_rec_to_user(&resp->ib_route[0],
577 &route->path_rec[0]);
584 static ssize_t ucma_query_route(struct ucma_file *file,
585 const char __user *inbuf,
586 int in_len, int out_len)
588 struct rdma_ucm_query_route cmd;
589 struct rdma_ucm_query_route_resp resp;
590 struct ucma_context *ctx;
591 struct sockaddr *addr;
594 if (out_len < sizeof(resp))
597 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
600 ctx = ucma_get_ctx(file, cmd.id);
604 memset(&resp, 0, sizeof resp);
605 addr = &ctx->cm_id->route.addr.src_addr;
606 memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ?
607 sizeof(struct sockaddr_in) :
608 sizeof(struct sockaddr_in6));
609 addr = &ctx->cm_id->route.addr.dst_addr;
610 memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ?
611 sizeof(struct sockaddr_in) :
612 sizeof(struct sockaddr_in6));
613 if (!ctx->cm_id->device)
616 resp.node_guid = ctx->cm_id->device->node_guid;
617 resp.port_num = ctx->cm_id->port_num;
618 switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) {
619 case RDMA_TRANSPORT_IB:
620 ucma_copy_ib_route(&resp, &ctx->cm_id->route);
627 if (copy_to_user((void __user *)(unsigned long)cmd.response,
628 &resp, sizeof(resp)))
635 static void ucma_copy_conn_param(struct rdma_conn_param *dst,
636 struct rdma_ucm_conn_param *src)
638 dst->private_data = src->private_data;
639 dst->private_data_len = src->private_data_len;
640 dst->responder_resources =src->responder_resources;
641 dst->initiator_depth = src->initiator_depth;
642 dst->flow_control = src->flow_control;
643 dst->retry_count = src->retry_count;
644 dst->rnr_retry_count = src->rnr_retry_count;
646 dst->qp_num = src->qp_num;
649 static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
650 int in_len, int out_len)
652 struct rdma_ucm_connect cmd;
653 struct rdma_conn_param conn_param;
654 struct ucma_context *ctx;
657 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
660 if (!cmd.conn_param.valid)
663 ctx = ucma_get_ctx(file, cmd.id);
667 ucma_copy_conn_param(&conn_param, &cmd.conn_param);
668 ret = rdma_connect(ctx->cm_id, &conn_param);
673 static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf,
674 int in_len, int out_len)
676 struct rdma_ucm_listen cmd;
677 struct ucma_context *ctx;
680 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
683 ctx = ucma_get_ctx(file, cmd.id);
687 ctx->backlog = cmd.backlog > 0 && cmd.backlog < UCMA_MAX_BACKLOG ?
688 cmd.backlog : UCMA_MAX_BACKLOG;
689 ret = rdma_listen(ctx->cm_id, ctx->backlog);
694 static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf,
695 int in_len, int out_len)
697 struct rdma_ucm_accept cmd;
698 struct rdma_conn_param conn_param;
699 struct ucma_context *ctx;
702 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
705 ctx = ucma_get_ctx(file, cmd.id);
709 if (cmd.conn_param.valid) {
711 ucma_copy_conn_param(&conn_param, &cmd.conn_param);
712 ret = rdma_accept(ctx->cm_id, &conn_param);
714 ret = rdma_accept(ctx->cm_id, NULL);
720 static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf,
721 int in_len, int out_len)
723 struct rdma_ucm_reject cmd;
724 struct ucma_context *ctx;
727 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
730 ctx = ucma_get_ctx(file, cmd.id);
734 ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len);
739 static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf,
740 int in_len, int out_len)
742 struct rdma_ucm_disconnect cmd;
743 struct ucma_context *ctx;
746 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
749 ctx = ucma_get_ctx(file, cmd.id);
753 ret = rdma_disconnect(ctx->cm_id);
758 static ssize_t ucma_init_qp_attr(struct ucma_file *file,
759 const char __user *inbuf,
760 int in_len, int out_len)
762 struct rdma_ucm_init_qp_attr cmd;
763 struct ib_uverbs_qp_attr resp;
764 struct ucma_context *ctx;
765 struct ib_qp_attr qp_attr;
768 if (out_len < sizeof(resp))
771 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
774 ctx = ucma_get_ctx(file, cmd.id);
778 resp.qp_attr_mask = 0;
779 memset(&qp_attr, 0, sizeof qp_attr);
780 qp_attr.qp_state = cmd.qp_state;
781 ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
785 ib_copy_qp_attr_to_user(&resp, &qp_attr);
786 if (copy_to_user((void __user *)(unsigned long)cmd.response,
787 &resp, sizeof(resp)))
795 static int ucma_set_option_id(struct ucma_context *ctx, int optname,
796 void *optval, size_t optlen)
801 case RDMA_OPTION_ID_TOS:
802 if (optlen != sizeof(u8)) {
806 rdma_set_service_type(ctx->cm_id, *((u8 *) optval));
815 static int ucma_set_option_level(struct ucma_context *ctx, int level,
816 int optname, void *optval, size_t optlen)
822 ret = ucma_set_option_id(ctx, optname, optval, optlen);
831 static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
832 int in_len, int out_len)
834 struct rdma_ucm_set_option cmd;
835 struct ucma_context *ctx;
839 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
842 ctx = ucma_get_ctx(file, cmd.id);
846 optval = kmalloc(cmd.optlen, GFP_KERNEL);
852 if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval,
858 ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,
867 static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
868 int in_len, int out_len)
870 struct rdma_ucm_notify cmd;
871 struct ucma_context *ctx;
874 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
877 ctx = ucma_get_ctx(file, cmd.id);
881 ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
886 static ssize_t ucma_join_multicast(struct ucma_file *file,
887 const char __user *inbuf,
888 int in_len, int out_len)
890 struct rdma_ucm_join_mcast cmd;
891 struct rdma_ucm_create_id_resp resp;
892 struct ucma_context *ctx;
893 struct ucma_multicast *mc;
896 if (out_len < sizeof(resp))
899 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
902 ctx = ucma_get_ctx(file, cmd.id);
906 mutex_lock(&file->mut);
907 mc = ucma_alloc_multicast(ctx);
914 memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr);
915 ret = rdma_join_multicast(ctx->cm_id, &mc->addr, mc);
920 if (copy_to_user((void __user *)(unsigned long)cmd.response,
921 &resp, sizeof(resp))) {
926 mutex_unlock(&file->mut);
931 rdma_leave_multicast(ctx->cm_id, &mc->addr);
932 ucma_cleanup_mc_events(mc);
935 idr_remove(&multicast_idr, mc->id);
940 mutex_unlock(&file->mut);
945 static ssize_t ucma_leave_multicast(struct ucma_file *file,
946 const char __user *inbuf,
947 int in_len, int out_len)
949 struct rdma_ucm_destroy_id cmd;
950 struct rdma_ucm_destroy_id_resp resp;
951 struct ucma_multicast *mc;
954 if (out_len < sizeof(resp))
957 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
961 mc = idr_find(&multicast_idr, cmd.id);
963 mc = ERR_PTR(-ENOENT);
964 else if (mc->ctx->file != file)
965 mc = ERR_PTR(-EINVAL);
967 idr_remove(&multicast_idr, mc->id);
968 atomic_inc(&mc->ctx->ref);
977 rdma_leave_multicast(mc->ctx->cm_id, &mc->addr);
978 mutex_lock(&mc->ctx->file->mut);
979 ucma_cleanup_mc_events(mc);
981 mutex_unlock(&mc->ctx->file->mut);
983 ucma_put_ctx(mc->ctx);
984 resp.events_reported = mc->events_reported;
987 if (copy_to_user((void __user *)(unsigned long)cmd.response,
988 &resp, sizeof(resp)))
994 static ssize_t (*ucma_cmd_table[])(struct ucma_file *file,
995 const char __user *inbuf,
996 int in_len, int out_len) = {
997 [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id,
998 [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id,
999 [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr,
1000 [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr,
1001 [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route,
1002 [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route,
1003 [RDMA_USER_CM_CMD_CONNECT] = ucma_connect,
1004 [RDMA_USER_CM_CMD_LISTEN] = ucma_listen,
1005 [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept,
1006 [RDMA_USER_CM_CMD_REJECT] = ucma_reject,
1007 [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect,
1008 [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr,
1009 [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event,
1010 [RDMA_USER_CM_CMD_GET_OPTION] = NULL,
1011 [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option,
1012 [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify,
1013 [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast,
1014 [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast,
1017 static ssize_t ucma_write(struct file *filp, const char __user *buf,
1018 size_t len, loff_t *pos)
1020 struct ucma_file *file = filp->private_data;
1021 struct rdma_ucm_cmd_hdr hdr;
1024 if (len < sizeof(hdr))
1027 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1030 if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucma_cmd_table))
1033 if (hdr.in + sizeof(hdr) > len)
1036 if (!ucma_cmd_table[hdr.cmd])
1039 ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out);
1046 static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait)
1048 struct ucma_file *file = filp->private_data;
1049 unsigned int mask = 0;
1051 poll_wait(filp, &file->poll_wait, wait);
1053 if (!list_empty(&file->event_list))
1054 mask = POLLIN | POLLRDNORM;
1059 static int ucma_open(struct inode *inode, struct file *filp)
1061 struct ucma_file *file;
1063 file = kmalloc(sizeof *file, GFP_KERNEL);
1067 INIT_LIST_HEAD(&file->event_list);
1068 INIT_LIST_HEAD(&file->ctx_list);
1069 init_waitqueue_head(&file->poll_wait);
1070 mutex_init(&file->mut);
1072 filp->private_data = file;
1077 static int ucma_close(struct inode *inode, struct file *filp)
1079 struct ucma_file *file = filp->private_data;
1080 struct ucma_context *ctx, *tmp;
1082 mutex_lock(&file->mut);
1083 list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) {
1084 mutex_unlock(&file->mut);
1087 idr_remove(&ctx_idr, ctx->id);
1091 mutex_lock(&file->mut);
1093 mutex_unlock(&file->mut);
1098 static const struct file_operations ucma_fops = {
1099 .owner = THIS_MODULE,
1101 .release = ucma_close,
1102 .write = ucma_write,
1106 static struct miscdevice ucma_misc = {
1107 .minor = MISC_DYNAMIC_MINOR,
1112 static ssize_t show_abi_version(struct device *dev,
1113 struct device_attribute *attr,
1116 return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
1118 static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
1120 static int __init ucma_init(void)
1124 ret = misc_register(&ucma_misc);
1128 ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version);
1130 printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n");
1135 misc_deregister(&ucma_misc);
1139 static void __exit ucma_cleanup(void)
1141 device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
1142 misc_deregister(&ucma_misc);
1143 idr_destroy(&ctx_idr);
1146 module_init(ucma_init);
1147 module_exit(ucma_cleanup);