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/file.h>
35 #include <linux/mutex.h>
36 #include <linux/poll.h>
37 #include <linux/sched.h>
38 #include <linux/idr.h>
40 #include <linux/in6.h>
41 #include <linux/miscdevice.h>
42 #include <linux/slab.h>
43 #include <linux/sysctl.h>
44 #include <linux/module.h>
45 #include <linux/nsproxy.h>
47 #include <linux/nospec.h>
49 #include <rdma/rdma_user_cm.h>
50 #include <rdma/ib_marshall.h>
51 #include <rdma/rdma_cm.h>
52 #include <rdma/rdma_cm_ib.h>
53 #include <rdma/ib_addr.h>
56 MODULE_AUTHOR("Sean Hefty");
57 MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
58 MODULE_LICENSE("Dual BSD/GPL");
60 static unsigned int max_backlog = 1024;
62 static struct ctl_table_header *ucma_ctl_table_hdr;
63 static struct ctl_table ucma_ctl_table[] = {
65 .procname = "max_backlog",
67 .maxlen = sizeof max_backlog,
69 .proc_handler = proc_dointvec,
77 struct list_head ctx_list;
78 struct list_head event_list;
79 wait_queue_head_t poll_wait;
80 struct workqueue_struct *close_wq;
85 struct completion comp;
90 struct ucma_file *file;
91 struct rdma_cm_id *cm_id;
94 struct list_head list;
95 struct list_head mc_list;
96 /* mark that device is in process of destroying the internal HW
97 * resources, protected by the global mut
100 /* sync between removal event and id destroy, protected by file mut */
102 struct work_struct close_work;
105 struct ucma_multicast {
106 struct ucma_context *ctx;
112 struct list_head list;
113 struct sockaddr_storage addr;
117 struct ucma_context *ctx;
118 struct ucma_multicast *mc;
119 struct list_head list;
120 struct rdma_cm_id *cm_id;
121 struct rdma_ucm_event_resp resp;
122 struct work_struct close_work;
125 static DEFINE_MUTEX(mut);
126 static DEFINE_IDR(ctx_idr);
127 static DEFINE_IDR(multicast_idr);
129 static const struct file_operations ucma_fops;
131 static inline struct ucma_context *_ucma_find_context(int id,
132 struct ucma_file *file)
134 struct ucma_context *ctx;
136 ctx = idr_find(&ctx_idr, id);
138 ctx = ERR_PTR(-ENOENT);
139 else if (ctx->file != file || !ctx->cm_id)
140 ctx = ERR_PTR(-EINVAL);
144 static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id)
146 struct ucma_context *ctx;
149 ctx = _ucma_find_context(id, file);
154 atomic_inc(&ctx->ref);
160 static void ucma_put_ctx(struct ucma_context *ctx)
162 if (atomic_dec_and_test(&ctx->ref))
163 complete(&ctx->comp);
167 * Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the
170 static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id)
172 struct ucma_context *ctx = ucma_get_ctx(file, id);
176 if (!ctx->cm_id->device) {
178 return ERR_PTR(-EINVAL);
183 static void ucma_close_event_id(struct work_struct *work)
185 struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work);
187 rdma_destroy_id(uevent_close->cm_id);
191 static void ucma_close_id(struct work_struct *work)
193 struct ucma_context *ctx = container_of(work, struct ucma_context, close_work);
195 /* once all inflight tasks are finished, we close all underlying
196 * resources. The context is still alive till its explicit destryoing
200 wait_for_completion(&ctx->comp);
201 /* No new events will be generated after destroying the id. */
202 rdma_destroy_id(ctx->cm_id);
205 static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
207 struct ucma_context *ctx;
209 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
213 INIT_WORK(&ctx->close_work, ucma_close_id);
214 atomic_set(&ctx->ref, 1);
215 init_completion(&ctx->comp);
216 INIT_LIST_HEAD(&ctx->mc_list);
220 ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL);
225 list_add_tail(&ctx->list, &file->ctx_list);
233 static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx)
235 struct ucma_multicast *mc;
237 mc = kzalloc(sizeof(*mc), GFP_KERNEL);
242 mc->id = idr_alloc(&multicast_idr, NULL, 0, 0, GFP_KERNEL);
248 list_add_tail(&mc->list, &ctx->mc_list);
256 static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
257 struct rdma_conn_param *src)
259 if (src->private_data_len)
260 memcpy(dst->private_data, src->private_data,
261 src->private_data_len);
262 dst->private_data_len = src->private_data_len;
263 dst->responder_resources =src->responder_resources;
264 dst->initiator_depth = src->initiator_depth;
265 dst->flow_control = src->flow_control;
266 dst->retry_count = src->retry_count;
267 dst->rnr_retry_count = src->rnr_retry_count;
269 dst->qp_num = src->qp_num;
272 static void ucma_copy_ud_event(struct ib_device *device,
273 struct rdma_ucm_ud_param *dst,
274 struct rdma_ud_param *src)
276 if (src->private_data_len)
277 memcpy(dst->private_data, src->private_data,
278 src->private_data_len);
279 dst->private_data_len = src->private_data_len;
280 ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr);
281 dst->qp_num = src->qp_num;
282 dst->qkey = src->qkey;
285 static void ucma_set_event_context(struct ucma_context *ctx,
286 struct rdma_cm_event *event,
287 struct ucma_event *uevent)
290 switch (event->event) {
291 case RDMA_CM_EVENT_MULTICAST_JOIN:
292 case RDMA_CM_EVENT_MULTICAST_ERROR:
293 uevent->mc = (struct ucma_multicast *)
294 event->param.ud.private_data;
295 uevent->resp.uid = uevent->mc->uid;
296 uevent->resp.id = uevent->mc->id;
299 uevent->resp.uid = ctx->uid;
300 uevent->resp.id = ctx->id;
305 /* Called with file->mut locked for the relevant context. */
306 static void ucma_removal_event_handler(struct rdma_cm_id *cm_id)
308 struct ucma_context *ctx = cm_id->context;
309 struct ucma_event *con_req_eve;
315 /* only if context is pointing to cm_id that it owns it and can be
316 * queued to be closed, otherwise that cm_id is an inflight one that
317 * is part of that context event list pending to be detached and
318 * reattached to its new context as part of ucma_get_event,
319 * handled separately below.
321 if (ctx->cm_id == cm_id) {
325 queue_work(ctx->file->close_wq, &ctx->close_work);
329 list_for_each_entry(con_req_eve, &ctx->file->event_list, list) {
330 if (con_req_eve->cm_id == cm_id &&
331 con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
332 list_del(&con_req_eve->list);
333 INIT_WORK(&con_req_eve->close_work, ucma_close_event_id);
334 queue_work(ctx->file->close_wq, &con_req_eve->close_work);
340 pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n");
343 static int ucma_event_handler(struct rdma_cm_id *cm_id,
344 struct rdma_cm_event *event)
346 struct ucma_event *uevent;
347 struct ucma_context *ctx = cm_id->context;
350 uevent = kzalloc(sizeof(*uevent), GFP_KERNEL);
352 return event->event == RDMA_CM_EVENT_CONNECT_REQUEST;
354 mutex_lock(&ctx->file->mut);
355 uevent->cm_id = cm_id;
356 ucma_set_event_context(ctx, event, uevent);
357 uevent->resp.event = event->event;
358 uevent->resp.status = event->status;
359 if (cm_id->qp_type == IB_QPT_UD)
360 ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud,
363 ucma_copy_conn_event(&uevent->resp.param.conn,
366 if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) {
373 } else if (!ctx->uid || ctx->cm_id != cm_id) {
375 * We ignore events for new connections until userspace has set
376 * their context. This can only happen if an error occurs on a
377 * new connection before the user accepts it. This is okay,
378 * since the accept will just fail later. However, we do need
379 * to release the underlying HW resources in case of a device
382 if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
383 ucma_removal_event_handler(cm_id);
389 list_add_tail(&uevent->list, &ctx->file->event_list);
390 wake_up_interruptible(&ctx->file->poll_wait);
391 if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
392 ucma_removal_event_handler(cm_id);
394 mutex_unlock(&ctx->file->mut);
398 static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf,
399 int in_len, int out_len)
401 struct ucma_context *ctx;
402 struct rdma_ucm_get_event cmd;
403 struct ucma_event *uevent;
407 * Old 32 bit user space does not send the 4 byte padding in the
408 * reserved field. We don't care, allow it to keep working.
410 if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved))
413 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
416 mutex_lock(&file->mut);
417 while (list_empty(&file->event_list)) {
418 mutex_unlock(&file->mut);
420 if (file->filp->f_flags & O_NONBLOCK)
423 if (wait_event_interruptible(file->poll_wait,
424 !list_empty(&file->event_list)))
427 mutex_lock(&file->mut);
430 uevent = list_entry(file->event_list.next, struct ucma_event, list);
432 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) {
433 ctx = ucma_alloc_ctx(file);
438 uevent->ctx->backlog++;
439 ctx->cm_id = uevent->cm_id;
440 ctx->cm_id->context = ctx;
441 uevent->resp.id = ctx->id;
444 if (copy_to_user(u64_to_user_ptr(cmd.response),
446 min_t(size_t, out_len, sizeof(uevent->resp)))) {
451 list_del(&uevent->list);
452 uevent->ctx->events_reported++;
454 uevent->mc->events_reported++;
457 mutex_unlock(&file->mut);
461 static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type)
465 *qp_type = IB_QPT_RC;
469 *qp_type = IB_QPT_UD;
472 *qp_type = cmd->qp_type;
479 static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf,
480 int in_len, int out_len)
482 struct rdma_ucm_create_id cmd;
483 struct rdma_ucm_create_id_resp resp;
484 struct ucma_context *ctx;
485 struct rdma_cm_id *cm_id;
486 enum ib_qp_type qp_type;
489 if (out_len < sizeof(resp))
492 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
495 ret = ucma_get_qp_type(&cmd, &qp_type);
499 mutex_lock(&file->mut);
500 ctx = ucma_alloc_ctx(file);
501 mutex_unlock(&file->mut);
506 cm_id = __rdma_create_id(current->nsproxy->net_ns,
507 ucma_event_handler, ctx, cmd.ps, qp_type, NULL);
509 ret = PTR_ERR(cm_id);
514 if (copy_to_user(u64_to_user_ptr(cmd.response),
515 &resp, sizeof(resp))) {
524 rdma_destroy_id(cm_id);
527 idr_remove(&ctx_idr, ctx->id);
529 mutex_lock(&file->mut);
530 list_del(&ctx->list);
531 mutex_unlock(&file->mut);
536 static void ucma_cleanup_multicast(struct ucma_context *ctx)
538 struct ucma_multicast *mc, *tmp;
541 list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) {
543 idr_remove(&multicast_idr, mc->id);
549 static void ucma_cleanup_mc_events(struct ucma_multicast *mc)
551 struct ucma_event *uevent, *tmp;
553 list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) {
554 if (uevent->mc != mc)
557 list_del(&uevent->list);
563 * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At
564 * this point, no new events will be reported from the hardware. However, we
565 * still need to cleanup the UCMA context for this ID. Specifically, there
566 * might be events that have not yet been consumed by the user space software.
567 * These might include pending connect requests which we have not completed
568 * processing. We cannot call rdma_destroy_id while holding the lock of the
569 * context (file->mut), as it might cause a deadlock. We therefore extract all
570 * relevant events from the context pending events list while holding the
571 * mutex. After that we release them as needed.
573 static int ucma_free_ctx(struct ucma_context *ctx)
576 struct ucma_event *uevent, *tmp;
580 ucma_cleanup_multicast(ctx);
582 /* Cleanup events not yet reported to the user. */
583 mutex_lock(&ctx->file->mut);
584 list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) {
585 if (uevent->ctx == ctx)
586 list_move_tail(&uevent->list, &list);
588 list_del(&ctx->list);
589 mutex_unlock(&ctx->file->mut);
591 list_for_each_entry_safe(uevent, tmp, &list, list) {
592 list_del(&uevent->list);
593 if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST)
594 rdma_destroy_id(uevent->cm_id);
598 events_reported = ctx->events_reported;
600 return events_reported;
603 static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf,
604 int in_len, int out_len)
606 struct rdma_ucm_destroy_id cmd;
607 struct rdma_ucm_destroy_id_resp resp;
608 struct ucma_context *ctx;
611 if (out_len < sizeof(resp))
614 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
618 ctx = _ucma_find_context(cmd.id, file);
620 idr_remove(&ctx_idr, ctx->id);
626 mutex_lock(&ctx->file->mut);
628 mutex_unlock(&ctx->file->mut);
630 flush_workqueue(ctx->file->close_wq);
631 /* At this point it's guaranteed that there is no inflight
637 wait_for_completion(&ctx->comp);
638 rdma_destroy_id(ctx->cm_id);
643 resp.events_reported = ucma_free_ctx(ctx);
644 if (copy_to_user(u64_to_user_ptr(cmd.response),
645 &resp, sizeof(resp)))
651 static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf,
652 int in_len, int out_len)
654 struct rdma_ucm_bind_ip cmd;
655 struct ucma_context *ctx;
658 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
661 if (!rdma_addr_size_in6(&cmd.addr))
664 ctx = ucma_get_ctx(file, cmd.id);
668 ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr);
673 static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf,
674 int in_len, int out_len)
676 struct rdma_ucm_bind cmd;
677 struct ucma_context *ctx;
680 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
683 if (cmd.reserved || !cmd.addr_size ||
684 cmd.addr_size != rdma_addr_size_kss(&cmd.addr))
687 ctx = ucma_get_ctx(file, cmd.id);
691 ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr);
696 static ssize_t ucma_resolve_ip(struct ucma_file *file,
697 const char __user *inbuf,
698 int in_len, int out_len)
700 struct rdma_ucm_resolve_ip cmd;
701 struct ucma_context *ctx;
704 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
707 if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) ||
708 !rdma_addr_size_in6(&cmd.dst_addr))
711 ctx = ucma_get_ctx(file, cmd.id);
715 ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr,
716 (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms);
721 static ssize_t ucma_resolve_addr(struct ucma_file *file,
722 const char __user *inbuf,
723 int in_len, int out_len)
725 struct rdma_ucm_resolve_addr cmd;
726 struct ucma_context *ctx;
729 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
733 (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) ||
734 !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr)))
737 ctx = ucma_get_ctx(file, cmd.id);
741 ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr,
742 (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms);
747 static ssize_t ucma_resolve_route(struct ucma_file *file,
748 const char __user *inbuf,
749 int in_len, int out_len)
751 struct rdma_ucm_resolve_route cmd;
752 struct ucma_context *ctx;
755 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
758 ctx = ucma_get_ctx_dev(file, cmd.id);
762 ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms);
767 static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp,
768 struct rdma_route *route)
770 struct rdma_dev_addr *dev_addr;
772 resp->num_paths = route->num_paths;
773 switch (route->num_paths) {
775 dev_addr = &route->addr.dev_addr;
776 rdma_addr_get_dgid(dev_addr,
777 (union ib_gid *) &resp->ib_route[0].dgid);
778 rdma_addr_get_sgid(dev_addr,
779 (union ib_gid *) &resp->ib_route[0].sgid);
780 resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
783 ib_copy_path_rec_to_user(&resp->ib_route[1],
784 &route->path_rec[1]);
787 ib_copy_path_rec_to_user(&resp->ib_route[0],
788 &route->path_rec[0]);
795 static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp,
796 struct rdma_route *route)
799 resp->num_paths = route->num_paths;
800 switch (route->num_paths) {
802 rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr,
803 (union ib_gid *)&resp->ib_route[0].dgid);
804 rdma_ip2gid((struct sockaddr *)&route->addr.src_addr,
805 (union ib_gid *)&resp->ib_route[0].sgid);
806 resp->ib_route[0].pkey = cpu_to_be16(0xffff);
809 ib_copy_path_rec_to_user(&resp->ib_route[1],
810 &route->path_rec[1]);
813 ib_copy_path_rec_to_user(&resp->ib_route[0],
814 &route->path_rec[0]);
821 static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp,
822 struct rdma_route *route)
824 struct rdma_dev_addr *dev_addr;
826 dev_addr = &route->addr.dev_addr;
827 rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid);
828 rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid);
831 static ssize_t ucma_query_route(struct ucma_file *file,
832 const char __user *inbuf,
833 int in_len, int out_len)
835 struct rdma_ucm_query cmd;
836 struct rdma_ucm_query_route_resp resp;
837 struct ucma_context *ctx;
838 struct sockaddr *addr;
841 if (out_len < sizeof(resp))
844 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
847 ctx = ucma_get_ctx(file, cmd.id);
851 memset(&resp, 0, sizeof resp);
852 addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr;
853 memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ?
854 sizeof(struct sockaddr_in) :
855 sizeof(struct sockaddr_in6));
856 addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr;
857 memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ?
858 sizeof(struct sockaddr_in) :
859 sizeof(struct sockaddr_in6));
860 if (!ctx->cm_id->device)
863 resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid;
864 resp.port_num = ctx->cm_id->port_num;
866 if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num))
867 ucma_copy_ib_route(&resp, &ctx->cm_id->route);
868 else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num))
869 ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
870 else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num))
871 ucma_copy_iw_route(&resp, &ctx->cm_id->route);
874 if (copy_to_user(u64_to_user_ptr(cmd.response),
875 &resp, sizeof(resp)))
882 static void ucma_query_device_addr(struct rdma_cm_id *cm_id,
883 struct rdma_ucm_query_addr_resp *resp)
888 resp->node_guid = (__force __u64) cm_id->device->node_guid;
889 resp->port_num = cm_id->port_num;
890 resp->pkey = (__force __u16) cpu_to_be16(
891 ib_addr_get_pkey(&cm_id->route.addr.dev_addr));
894 static ssize_t ucma_query_addr(struct ucma_context *ctx,
895 void __user *response, int out_len)
897 struct rdma_ucm_query_addr_resp resp;
898 struct sockaddr *addr;
901 if (out_len < sizeof(resp))
904 memset(&resp, 0, sizeof resp);
906 addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr;
907 resp.src_size = rdma_addr_size(addr);
908 memcpy(&resp.src_addr, addr, resp.src_size);
910 addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr;
911 resp.dst_size = rdma_addr_size(addr);
912 memcpy(&resp.dst_addr, addr, resp.dst_size);
914 ucma_query_device_addr(ctx->cm_id, &resp);
916 if (copy_to_user(response, &resp, sizeof(resp)))
922 static ssize_t ucma_query_path(struct ucma_context *ctx,
923 void __user *response, int out_len)
925 struct rdma_ucm_query_path_resp *resp;
928 if (out_len < sizeof(*resp))
931 resp = kzalloc(out_len, GFP_KERNEL);
935 resp->num_paths = ctx->cm_id->route.num_paths;
936 for (i = 0, out_len -= sizeof(*resp);
937 i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data);
938 i++, out_len -= sizeof(struct ib_path_rec_data)) {
939 struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i];
941 resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY |
942 IB_PATH_BIDIRECTIONAL;
943 if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
944 struct sa_path_rec ib;
946 sa_convert_path_opa_to_ib(&ib, rec);
947 ib_sa_pack_path(&ib, &resp->path_data[i].path_rec);
950 ib_sa_pack_path(rec, &resp->path_data[i].path_rec);
954 if (copy_to_user(response, resp,
955 sizeof(*resp) + (i * sizeof(struct ib_path_rec_data))))
962 static ssize_t ucma_query_gid(struct ucma_context *ctx,
963 void __user *response, int out_len)
965 struct rdma_ucm_query_addr_resp resp;
966 struct sockaddr_ib *addr;
969 if (out_len < sizeof(resp))
972 memset(&resp, 0, sizeof resp);
974 ucma_query_device_addr(ctx->cm_id, &resp);
976 addr = (struct sockaddr_ib *) &resp.src_addr;
977 resp.src_size = sizeof(*addr);
978 if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) {
979 memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size);
981 addr->sib_family = AF_IB;
982 addr->sib_pkey = (__force __be16) resp.pkey;
983 rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr,
985 addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *)
986 &ctx->cm_id->route.addr.src_addr);
989 addr = (struct sockaddr_ib *) &resp.dst_addr;
990 resp.dst_size = sizeof(*addr);
991 if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) {
992 memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size);
994 addr->sib_family = AF_IB;
995 addr->sib_pkey = (__force __be16) resp.pkey;
996 rdma_read_gids(ctx->cm_id, NULL,
997 (union ib_gid *)&addr->sib_addr);
998 addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *)
999 &ctx->cm_id->route.addr.dst_addr);
1002 if (copy_to_user(response, &resp, sizeof(resp)))
1008 static ssize_t ucma_query(struct ucma_file *file,
1009 const char __user *inbuf,
1010 int in_len, int out_len)
1012 struct rdma_ucm_query cmd;
1013 struct ucma_context *ctx;
1014 void __user *response;
1017 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1020 response = u64_to_user_ptr(cmd.response);
1021 ctx = ucma_get_ctx(file, cmd.id);
1023 return PTR_ERR(ctx);
1025 switch (cmd.option) {
1026 case RDMA_USER_CM_QUERY_ADDR:
1027 ret = ucma_query_addr(ctx, response, out_len);
1029 case RDMA_USER_CM_QUERY_PATH:
1030 ret = ucma_query_path(ctx, response, out_len);
1032 case RDMA_USER_CM_QUERY_GID:
1033 ret = ucma_query_gid(ctx, response, out_len);
1044 static void ucma_copy_conn_param(struct rdma_cm_id *id,
1045 struct rdma_conn_param *dst,
1046 struct rdma_ucm_conn_param *src)
1048 dst->private_data = src->private_data;
1049 dst->private_data_len = src->private_data_len;
1050 dst->responder_resources =src->responder_resources;
1051 dst->initiator_depth = src->initiator_depth;
1052 dst->flow_control = src->flow_control;
1053 dst->retry_count = src->retry_count;
1054 dst->rnr_retry_count = src->rnr_retry_count;
1055 dst->srq = src->srq;
1056 dst->qp_num = src->qp_num;
1057 dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0;
1060 static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
1061 int in_len, int out_len)
1063 struct rdma_ucm_connect cmd;
1064 struct rdma_conn_param conn_param;
1065 struct ucma_context *ctx;
1068 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1071 if (!cmd.conn_param.valid)
1074 ctx = ucma_get_ctx_dev(file, cmd.id);
1076 return PTR_ERR(ctx);
1078 ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param);
1079 ret = rdma_connect(ctx->cm_id, &conn_param);
1084 static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf,
1085 int in_len, int out_len)
1087 struct rdma_ucm_listen cmd;
1088 struct ucma_context *ctx;
1091 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1094 ctx = ucma_get_ctx(file, cmd.id);
1096 return PTR_ERR(ctx);
1098 ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ?
1099 cmd.backlog : max_backlog;
1100 ret = rdma_listen(ctx->cm_id, ctx->backlog);
1105 static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf,
1106 int in_len, int out_len)
1108 struct rdma_ucm_accept cmd;
1109 struct rdma_conn_param conn_param;
1110 struct ucma_context *ctx;
1113 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1116 ctx = ucma_get_ctx_dev(file, cmd.id);
1118 return PTR_ERR(ctx);
1120 if (cmd.conn_param.valid) {
1121 ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param);
1122 mutex_lock(&file->mut);
1123 ret = __rdma_accept(ctx->cm_id, &conn_param, NULL);
1126 mutex_unlock(&file->mut);
1128 ret = __rdma_accept(ctx->cm_id, NULL, NULL);
1134 static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf,
1135 int in_len, int out_len)
1137 struct rdma_ucm_reject cmd;
1138 struct ucma_context *ctx;
1141 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1144 ctx = ucma_get_ctx_dev(file, cmd.id);
1146 return PTR_ERR(ctx);
1148 ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len);
1153 static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf,
1154 int in_len, int out_len)
1156 struct rdma_ucm_disconnect cmd;
1157 struct ucma_context *ctx;
1160 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1163 ctx = ucma_get_ctx_dev(file, cmd.id);
1165 return PTR_ERR(ctx);
1167 ret = rdma_disconnect(ctx->cm_id);
1172 static ssize_t ucma_init_qp_attr(struct ucma_file *file,
1173 const char __user *inbuf,
1174 int in_len, int out_len)
1176 struct rdma_ucm_init_qp_attr cmd;
1177 struct ib_uverbs_qp_attr resp;
1178 struct ucma_context *ctx;
1179 struct ib_qp_attr qp_attr;
1182 if (out_len < sizeof(resp))
1185 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1188 if (cmd.qp_state > IB_QPS_ERR)
1191 ctx = ucma_get_ctx_dev(file, cmd.id);
1193 return PTR_ERR(ctx);
1195 resp.qp_attr_mask = 0;
1196 memset(&qp_attr, 0, sizeof qp_attr);
1197 qp_attr.qp_state = cmd.qp_state;
1198 ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
1202 ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr);
1203 if (copy_to_user(u64_to_user_ptr(cmd.response),
1204 &resp, sizeof(resp)))
1212 static int ucma_set_option_id(struct ucma_context *ctx, int optname,
1213 void *optval, size_t optlen)
1218 case RDMA_OPTION_ID_TOS:
1219 if (optlen != sizeof(u8)) {
1223 rdma_set_service_type(ctx->cm_id, *((u8 *) optval));
1225 case RDMA_OPTION_ID_REUSEADDR:
1226 if (optlen != sizeof(int)) {
1230 ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0);
1232 case RDMA_OPTION_ID_AFONLY:
1233 if (optlen != sizeof(int)) {
1237 ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0);
1246 static int ucma_set_ib_path(struct ucma_context *ctx,
1247 struct ib_path_rec_data *path_data, size_t optlen)
1249 struct sa_path_rec sa_path;
1250 struct rdma_cm_event event;
1253 if (optlen % sizeof(*path_data))
1256 for (; optlen; optlen -= sizeof(*path_data), path_data++) {
1257 if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY |
1258 IB_PATH_BIDIRECTIONAL))
1265 if (!ctx->cm_id->device)
1268 memset(&sa_path, 0, sizeof(sa_path));
1270 sa_path.rec_type = SA_PATH_REC_TYPE_IB;
1271 ib_sa_unpack_path(path_data->path_rec, &sa_path);
1273 if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) {
1274 struct sa_path_rec opa;
1276 sa_convert_path_ib_to_opa(&opa, &sa_path);
1277 ret = rdma_set_ib_path(ctx->cm_id, &opa);
1279 ret = rdma_set_ib_path(ctx->cm_id, &sa_path);
1284 memset(&event, 0, sizeof event);
1285 event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1286 return ucma_event_handler(ctx->cm_id, &event);
1289 static int ucma_set_option_ib(struct ucma_context *ctx, int optname,
1290 void *optval, size_t optlen)
1295 case RDMA_OPTION_IB_PATH:
1296 ret = ucma_set_ib_path(ctx, optval, optlen);
1305 static int ucma_set_option_level(struct ucma_context *ctx, int level,
1306 int optname, void *optval, size_t optlen)
1311 case RDMA_OPTION_ID:
1312 ret = ucma_set_option_id(ctx, optname, optval, optlen);
1314 case RDMA_OPTION_IB:
1315 ret = ucma_set_option_ib(ctx, optname, optval, optlen);
1324 static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
1325 int in_len, int out_len)
1327 struct rdma_ucm_set_option cmd;
1328 struct ucma_context *ctx;
1332 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1335 if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE))
1338 ctx = ucma_get_ctx(file, cmd.id);
1340 return PTR_ERR(ctx);
1342 optval = memdup_user(u64_to_user_ptr(cmd.optval),
1344 if (IS_ERR(optval)) {
1345 ret = PTR_ERR(optval);
1349 ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,
1358 static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
1359 int in_len, int out_len)
1361 struct rdma_ucm_notify cmd;
1362 struct ucma_context *ctx;
1365 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1368 ctx = ucma_get_ctx(file, cmd.id);
1370 return PTR_ERR(ctx);
1372 if (ctx->cm_id->device)
1373 ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event);
1379 static ssize_t ucma_process_join(struct ucma_file *file,
1380 struct rdma_ucm_join_mcast *cmd, int out_len)
1382 struct rdma_ucm_create_id_resp resp;
1383 struct ucma_context *ctx;
1384 struct ucma_multicast *mc;
1385 struct sockaddr *addr;
1389 if (out_len < sizeof(resp))
1392 addr = (struct sockaddr *) &cmd->addr;
1393 if (cmd->addr_size != rdma_addr_size(addr))
1396 if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER)
1397 join_state = BIT(FULLMEMBER_JOIN);
1398 else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER)
1399 join_state = BIT(SENDONLY_FULLMEMBER_JOIN);
1403 ctx = ucma_get_ctx_dev(file, cmd->id);
1405 return PTR_ERR(ctx);
1407 mutex_lock(&file->mut);
1408 mc = ucma_alloc_multicast(ctx);
1413 mc->join_state = join_state;
1415 memcpy(&mc->addr, addr, cmd->addr_size);
1416 ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr,
1422 if (copy_to_user(u64_to_user_ptr(cmd->response),
1423 &resp, sizeof(resp))) {
1429 idr_replace(&multicast_idr, mc, mc->id);
1432 mutex_unlock(&file->mut);
1437 rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr);
1438 ucma_cleanup_mc_events(mc);
1441 idr_remove(&multicast_idr, mc->id);
1443 list_del(&mc->list);
1446 mutex_unlock(&file->mut);
1451 static ssize_t ucma_join_ip_multicast(struct ucma_file *file,
1452 const char __user *inbuf,
1453 int in_len, int out_len)
1455 struct rdma_ucm_join_ip_mcast cmd;
1456 struct rdma_ucm_join_mcast join_cmd;
1458 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1461 join_cmd.response = cmd.response;
1462 join_cmd.uid = cmd.uid;
1463 join_cmd.id = cmd.id;
1464 join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr);
1465 if (!join_cmd.addr_size)
1468 join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER;
1469 memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size);
1471 return ucma_process_join(file, &join_cmd, out_len);
1474 static ssize_t ucma_join_multicast(struct ucma_file *file,
1475 const char __user *inbuf,
1476 int in_len, int out_len)
1478 struct rdma_ucm_join_mcast cmd;
1480 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1483 if (!rdma_addr_size_kss(&cmd.addr))
1486 return ucma_process_join(file, &cmd, out_len);
1489 static ssize_t ucma_leave_multicast(struct ucma_file *file,
1490 const char __user *inbuf,
1491 int in_len, int out_len)
1493 struct rdma_ucm_destroy_id cmd;
1494 struct rdma_ucm_destroy_id_resp resp;
1495 struct ucma_multicast *mc;
1498 if (out_len < sizeof(resp))
1501 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1505 mc = idr_find(&multicast_idr, cmd.id);
1507 mc = ERR_PTR(-ENOENT);
1508 else if (mc->ctx->file != file)
1509 mc = ERR_PTR(-EINVAL);
1510 else if (!atomic_inc_not_zero(&mc->ctx->ref))
1511 mc = ERR_PTR(-ENXIO);
1513 idr_remove(&multicast_idr, mc->id);
1521 rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr);
1522 mutex_lock(&mc->ctx->file->mut);
1523 ucma_cleanup_mc_events(mc);
1524 list_del(&mc->list);
1525 mutex_unlock(&mc->ctx->file->mut);
1527 ucma_put_ctx(mc->ctx);
1528 resp.events_reported = mc->events_reported;
1531 if (copy_to_user(u64_to_user_ptr(cmd.response),
1532 &resp, sizeof(resp)))
1538 static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2)
1540 /* Acquire mutex's based on pointer comparison to prevent deadlock. */
1541 if (file1 < file2) {
1542 mutex_lock(&file1->mut);
1543 mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING);
1545 mutex_lock(&file2->mut);
1546 mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING);
1550 static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2)
1552 if (file1 < file2) {
1553 mutex_unlock(&file2->mut);
1554 mutex_unlock(&file1->mut);
1556 mutex_unlock(&file1->mut);
1557 mutex_unlock(&file2->mut);
1561 static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file)
1563 struct ucma_event *uevent, *tmp;
1565 list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list)
1566 if (uevent->ctx == ctx)
1567 list_move_tail(&uevent->list, &file->event_list);
1570 static ssize_t ucma_migrate_id(struct ucma_file *new_file,
1571 const char __user *inbuf,
1572 int in_len, int out_len)
1574 struct rdma_ucm_migrate_id cmd;
1575 struct rdma_ucm_migrate_resp resp;
1576 struct ucma_context *ctx;
1578 struct ucma_file *cur_file;
1581 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1584 /* Get current fd to protect against it being closed */
1588 if (f.file->f_op != &ucma_fops) {
1593 /* Validate current fd and prevent destruction of id. */
1594 ctx = ucma_get_ctx(f.file->private_data, cmd.id);
1600 cur_file = ctx->file;
1601 if (cur_file == new_file) {
1602 resp.events_reported = ctx->events_reported;
1607 * Migrate events between fd's, maintaining order, and avoiding new
1608 * events being added before existing events.
1610 ucma_lock_files(cur_file, new_file);
1613 list_move_tail(&ctx->list, &new_file->ctx_list);
1614 ucma_move_events(ctx, new_file);
1615 ctx->file = new_file;
1616 resp.events_reported = ctx->events_reported;
1619 ucma_unlock_files(cur_file, new_file);
1622 if (copy_to_user(u64_to_user_ptr(cmd.response),
1623 &resp, sizeof(resp)))
1632 static ssize_t (*ucma_cmd_table[])(struct ucma_file *file,
1633 const char __user *inbuf,
1634 int in_len, int out_len) = {
1635 [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id,
1636 [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id,
1637 [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip,
1638 [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip,
1639 [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route,
1640 [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route,
1641 [RDMA_USER_CM_CMD_CONNECT] = ucma_connect,
1642 [RDMA_USER_CM_CMD_LISTEN] = ucma_listen,
1643 [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept,
1644 [RDMA_USER_CM_CMD_REJECT] = ucma_reject,
1645 [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect,
1646 [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr,
1647 [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event,
1648 [RDMA_USER_CM_CMD_GET_OPTION] = NULL,
1649 [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option,
1650 [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify,
1651 [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast,
1652 [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast,
1653 [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id,
1654 [RDMA_USER_CM_CMD_QUERY] = ucma_query,
1655 [RDMA_USER_CM_CMD_BIND] = ucma_bind,
1656 [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr,
1657 [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast
1660 static ssize_t ucma_write(struct file *filp, const char __user *buf,
1661 size_t len, loff_t *pos)
1663 struct ucma_file *file = filp->private_data;
1664 struct rdma_ucm_cmd_hdr hdr;
1667 if (!ib_safe_file_access(filp)) {
1668 pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n",
1669 task_tgid_vnr(current), current->comm);
1673 if (len < sizeof(hdr))
1676 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1679 if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table))
1681 hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table));
1683 if (hdr.in + sizeof(hdr) > len)
1686 if (!ucma_cmd_table[hdr.cmd])
1689 ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out);
1696 static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait)
1698 struct ucma_file *file = filp->private_data;
1701 poll_wait(filp, &file->poll_wait, wait);
1703 if (!list_empty(&file->event_list))
1704 mask = EPOLLIN | EPOLLRDNORM;
1710 * ucma_open() does not need the BKL:
1712 * - no global state is referred to;
1713 * - there is no ioctl method to race against;
1714 * - no further module initialization is required for open to work
1715 * after the device is registered.
1717 static int ucma_open(struct inode *inode, struct file *filp)
1719 struct ucma_file *file;
1721 file = kmalloc(sizeof *file, GFP_KERNEL);
1725 file->close_wq = alloc_ordered_workqueue("ucma_close_id",
1727 if (!file->close_wq) {
1732 INIT_LIST_HEAD(&file->event_list);
1733 INIT_LIST_HEAD(&file->ctx_list);
1734 init_waitqueue_head(&file->poll_wait);
1735 mutex_init(&file->mut);
1737 filp->private_data = file;
1740 return nonseekable_open(inode, filp);
1743 static int ucma_close(struct inode *inode, struct file *filp)
1745 struct ucma_file *file = filp->private_data;
1746 struct ucma_context *ctx, *tmp;
1748 mutex_lock(&file->mut);
1749 list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) {
1750 ctx->destroying = 1;
1751 mutex_unlock(&file->mut);
1754 idr_remove(&ctx_idr, ctx->id);
1757 flush_workqueue(file->close_wq);
1758 /* At that step once ctx was marked as destroying and workqueue
1759 * was flushed we are safe from any inflights handlers that
1760 * might put other closing task.
1763 if (!ctx->closing) {
1766 wait_for_completion(&ctx->comp);
1767 /* rdma_destroy_id ensures that no event handlers are
1768 * inflight for that id before releasing it.
1770 rdma_destroy_id(ctx->cm_id);
1776 mutex_lock(&file->mut);
1778 mutex_unlock(&file->mut);
1779 destroy_workqueue(file->close_wq);
1784 static const struct file_operations ucma_fops = {
1785 .owner = THIS_MODULE,
1787 .release = ucma_close,
1788 .write = ucma_write,
1790 .llseek = no_llseek,
1793 static struct miscdevice ucma_misc = {
1794 .minor = MISC_DYNAMIC_MINOR,
1796 .nodename = "infiniband/rdma_cm",
1801 static ssize_t show_abi_version(struct device *dev,
1802 struct device_attribute *attr,
1805 return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
1807 static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
1809 static int __init ucma_init(void)
1813 ret = misc_register(&ucma_misc);
1817 ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version);
1819 pr_err("rdma_ucm: couldn't create abi_version attr\n");
1823 ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table);
1824 if (!ucma_ctl_table_hdr) {
1825 pr_err("rdma_ucm: couldn't register sysctl paths\n");
1831 device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
1833 misc_deregister(&ucma_misc);
1837 static void __exit ucma_cleanup(void)
1839 unregister_net_sysctl_table(ucma_ctl_table_hdr);
1840 device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
1841 misc_deregister(&ucma_misc);
1842 idr_destroy(&ctx_idr);
1843 idr_destroy(&multicast_idr);
1846 module_init(ucma_init);
1847 module_exit(ucma_cleanup);