2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/idr.h>
44 #include <linux/workqueue.h>
45 #include <uapi/linux/if_ether.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
48 #include <rdma/rdma_netlink.h>
49 #include <net/netlink.h>
50 #include <uapi/rdma/ib_user_sa.h>
51 #include <rdma/ib_marshall.h>
52 #include <rdma/ib_addr.h>
54 #include "core_priv.h"
56 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
57 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
58 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
59 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
68 struct ib_sa_classport_cache {
70 struct ib_class_port_info data;
74 struct ib_mad_agent *agent;
75 struct ib_sa_sm_ah *sm_ah;
76 struct work_struct update_task;
77 struct ib_sa_classport_cache classport_info;
78 spinlock_t classport_lock; /* protects class port info set */
84 int start_port, end_port;
85 struct ib_event_handler event_handler;
86 struct ib_sa_port port[0];
90 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
91 void (*release)(struct ib_sa_query *);
92 struct ib_sa_client *client;
93 struct ib_sa_port *port;
94 struct ib_mad_send_buf *mad_buf;
95 struct ib_sa_sm_ah *sm_ah;
98 struct list_head list; /* Local svc request list */
99 u32 seq; /* Local svc request sequence number */
100 unsigned long timeout; /* Local svc timeout */
101 u8 path_use; /* How will the pathrecord be used */
104 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
105 #define IB_SA_CANCEL 0x00000002
107 struct ib_sa_service_query {
108 void (*callback)(int, struct ib_sa_service_rec *, void *);
110 struct ib_sa_query sa_query;
113 struct ib_sa_path_query {
114 void (*callback)(int, struct ib_sa_path_rec *, void *);
116 struct ib_sa_query sa_query;
119 struct ib_sa_guidinfo_query {
120 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
122 struct ib_sa_query sa_query;
125 struct ib_sa_classport_info_query {
126 void (*callback)(int, struct ib_class_port_info *, void *);
128 struct ib_sa_query sa_query;
131 struct ib_sa_mcmember_query {
132 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
134 struct ib_sa_query sa_query;
137 static LIST_HEAD(ib_nl_request_list);
138 static DEFINE_SPINLOCK(ib_nl_request_lock);
139 static atomic_t ib_nl_sa_request_seq;
140 static struct workqueue_struct *ib_nl_wq;
141 static struct delayed_work ib_nl_timed_work;
142 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
143 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
144 .len = sizeof(struct ib_path_rec_data)},
145 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
146 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
147 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
148 .len = sizeof(struct rdma_nla_ls_gid)},
149 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
150 .len = sizeof(struct rdma_nla_ls_gid)},
151 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
152 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
153 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
157 static void ib_sa_add_one(struct ib_device *device);
158 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
160 static struct ib_client sa_client = {
162 .add = ib_sa_add_one,
163 .remove = ib_sa_remove_one
166 static DEFINE_SPINLOCK(idr_lock);
167 static DEFINE_IDR(query_idr);
169 static DEFINE_SPINLOCK(tid_lock);
172 #define PATH_REC_FIELD(field) \
173 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
174 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
175 .field_name = "sa_path_rec:" #field
177 static const struct ib_field path_rec_table[] = {
178 { PATH_REC_FIELD(service_id),
182 { PATH_REC_FIELD(dgid),
186 { PATH_REC_FIELD(sgid),
190 { PATH_REC_FIELD(dlid),
194 { PATH_REC_FIELD(slid),
198 { PATH_REC_FIELD(raw_traffic),
206 { PATH_REC_FIELD(flow_label),
210 { PATH_REC_FIELD(hop_limit),
214 { PATH_REC_FIELD(traffic_class),
218 { PATH_REC_FIELD(reversible),
222 { PATH_REC_FIELD(numb_path),
226 { PATH_REC_FIELD(pkey),
230 { PATH_REC_FIELD(qos_class),
234 { PATH_REC_FIELD(sl),
238 { PATH_REC_FIELD(mtu_selector),
242 { PATH_REC_FIELD(mtu),
246 { PATH_REC_FIELD(rate_selector),
250 { PATH_REC_FIELD(rate),
254 { PATH_REC_FIELD(packet_life_time_selector),
258 { PATH_REC_FIELD(packet_life_time),
262 { PATH_REC_FIELD(preference),
272 #define MCMEMBER_REC_FIELD(field) \
273 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
274 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
275 .field_name = "sa_mcmember_rec:" #field
277 static const struct ib_field mcmember_rec_table[] = {
278 { MCMEMBER_REC_FIELD(mgid),
282 { MCMEMBER_REC_FIELD(port_gid),
286 { MCMEMBER_REC_FIELD(qkey),
290 { MCMEMBER_REC_FIELD(mlid),
294 { MCMEMBER_REC_FIELD(mtu_selector),
298 { MCMEMBER_REC_FIELD(mtu),
302 { MCMEMBER_REC_FIELD(traffic_class),
306 { MCMEMBER_REC_FIELD(pkey),
310 { MCMEMBER_REC_FIELD(rate_selector),
314 { MCMEMBER_REC_FIELD(rate),
318 { MCMEMBER_REC_FIELD(packet_life_time_selector),
322 { MCMEMBER_REC_FIELD(packet_life_time),
326 { MCMEMBER_REC_FIELD(sl),
330 { MCMEMBER_REC_FIELD(flow_label),
334 { MCMEMBER_REC_FIELD(hop_limit),
338 { MCMEMBER_REC_FIELD(scope),
342 { MCMEMBER_REC_FIELD(join_state),
346 { MCMEMBER_REC_FIELD(proxy_join),
356 #define SERVICE_REC_FIELD(field) \
357 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
358 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
359 .field_name = "sa_service_rec:" #field
361 static const struct ib_field service_rec_table[] = {
362 { SERVICE_REC_FIELD(id),
366 { SERVICE_REC_FIELD(gid),
370 { SERVICE_REC_FIELD(pkey),
374 { SERVICE_REC_FIELD(lease),
378 { SERVICE_REC_FIELD(key),
382 { SERVICE_REC_FIELD(name),
386 { SERVICE_REC_FIELD(data8),
390 { SERVICE_REC_FIELD(data16),
394 { SERVICE_REC_FIELD(data32),
398 { SERVICE_REC_FIELD(data64),
404 #define CLASSPORTINFO_REC_FIELD(field) \
405 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
406 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
407 .field_name = "ib_class_port_info:" #field
409 static const struct ib_field classport_info_rec_table[] = {
410 { CLASSPORTINFO_REC_FIELD(base_version),
414 { CLASSPORTINFO_REC_FIELD(class_version),
418 { CLASSPORTINFO_REC_FIELD(capability_mask),
422 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
426 { CLASSPORTINFO_REC_FIELD(redirect_gid),
430 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
434 { CLASSPORTINFO_REC_FIELD(redirect_lid),
438 { CLASSPORTINFO_REC_FIELD(redirect_pkey),
443 { CLASSPORTINFO_REC_FIELD(redirect_qp),
447 { CLASSPORTINFO_REC_FIELD(redirect_qkey),
452 { CLASSPORTINFO_REC_FIELD(trap_gid),
456 { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
461 { CLASSPORTINFO_REC_FIELD(trap_lid),
465 { CLASSPORTINFO_REC_FIELD(trap_pkey),
470 { CLASSPORTINFO_REC_FIELD(trap_hlqp),
474 { CLASSPORTINFO_REC_FIELD(trap_qkey),
480 #define GUIDINFO_REC_FIELD(field) \
481 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
482 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
483 .field_name = "sa_guidinfo_rec:" #field
485 static const struct ib_field guidinfo_rec_table[] = {
486 { GUIDINFO_REC_FIELD(lid),
490 { GUIDINFO_REC_FIELD(block_num),
494 { GUIDINFO_REC_FIELD(res1),
498 { GUIDINFO_REC_FIELD(res2),
502 { GUIDINFO_REC_FIELD(guid_info_list),
508 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
510 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
513 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
515 return (query->flags & IB_SA_CANCEL);
518 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
519 struct ib_sa_query *query)
521 struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1];
522 struct ib_sa_mad *mad = query->mad_buf->mad;
523 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
526 struct rdma_ls_resolve_header *header;
528 query->mad_buf->context[1] = NULL;
530 /* Construct the family header first */
531 header = (struct rdma_ls_resolve_header *)
532 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
533 memcpy(header->device_name, query->port->agent->device->name,
535 header->port_num = query->port->port_num;
537 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
538 sa_rec->reversible != 0)
539 query->path_use = LS_RESOLVE_PATH_USE_GMP;
541 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
542 header->path_use = query->path_use;
544 /* Now build the attributes */
545 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
546 val64 = be64_to_cpu(sa_rec->service_id);
547 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
548 sizeof(val64), &val64);
550 if (comp_mask & IB_SA_PATH_REC_DGID)
551 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
552 sizeof(sa_rec->dgid), &sa_rec->dgid);
553 if (comp_mask & IB_SA_PATH_REC_SGID)
554 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
555 sizeof(sa_rec->sgid), &sa_rec->sgid);
556 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
557 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
558 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
560 if (comp_mask & IB_SA_PATH_REC_PKEY) {
561 val16 = be16_to_cpu(sa_rec->pkey);
562 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
563 sizeof(val16), &val16);
565 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
566 val16 = be16_to_cpu(sa_rec->qos_class);
567 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
568 sizeof(val16), &val16);
572 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
576 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
577 len += nla_total_size(sizeof(u64));
578 if (comp_mask & IB_SA_PATH_REC_DGID)
579 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
580 if (comp_mask & IB_SA_PATH_REC_SGID)
581 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
582 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
583 len += nla_total_size(sizeof(u8));
584 if (comp_mask & IB_SA_PATH_REC_PKEY)
585 len += nla_total_size(sizeof(u16));
586 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
587 len += nla_total_size(sizeof(u16));
590 * Make sure that at least some of the required comp_mask bits are
593 if (WARN_ON(len == 0))
596 /* Add the family header */
597 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
602 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
604 struct sk_buff *skb = NULL;
605 struct nlmsghdr *nlh;
608 struct ib_sa_mad *mad;
611 mad = query->mad_buf->mad;
612 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
616 skb = nlmsg_new(len, gfp_mask);
620 /* Put nlmsg header only for now */
621 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
622 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
629 ib_nl_set_path_rec_attrs(skb, query);
631 /* Repair the nlmsg header length */
634 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
643 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
649 INIT_LIST_HEAD(&query->list);
650 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
652 /* Put the request on the list first.*/
653 spin_lock_irqsave(&ib_nl_request_lock, flags);
654 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
655 query->timeout = delay + jiffies;
656 list_add_tail(&query->list, &ib_nl_request_list);
657 /* Start the timeout if this is the only request */
658 if (ib_nl_request_list.next == &query->list)
659 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
660 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
662 ret = ib_nl_send_msg(query, gfp_mask);
665 /* Remove the request */
666 spin_lock_irqsave(&ib_nl_request_lock, flags);
667 list_del(&query->list);
668 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
676 static int ib_nl_cancel_request(struct ib_sa_query *query)
679 struct ib_sa_query *wait_query;
682 spin_lock_irqsave(&ib_nl_request_lock, flags);
683 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
684 /* Let the timeout to take care of the callback */
685 if (query == wait_query) {
686 query->flags |= IB_SA_CANCEL;
687 query->timeout = jiffies;
688 list_move(&query->list, &ib_nl_request_list);
690 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
694 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
699 static void send_handler(struct ib_mad_agent *agent,
700 struct ib_mad_send_wc *mad_send_wc);
702 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
703 const struct nlmsghdr *nlh)
705 struct ib_mad_send_wc mad_send_wc;
706 struct ib_sa_mad *mad = NULL;
707 const struct nlattr *head, *curr;
708 struct ib_path_rec_data *rec;
713 if (query->callback) {
714 head = (const struct nlattr *) nlmsg_data(nlh);
715 len = nlmsg_len(nlh);
716 switch (query->path_use) {
717 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
718 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
721 case LS_RESOLVE_PATH_USE_ALL:
722 case LS_RESOLVE_PATH_USE_GMP:
724 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
725 IB_PATH_BIDIRECTIONAL;
728 nla_for_each_attr(curr, head, len, rem) {
729 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
730 rec = nla_data(curr);
732 * Get the first one. In the future, we may
733 * need to get up to 6 pathrecords.
735 if ((rec->flags & mask) == mask) {
736 mad = query->mad_buf->mad;
737 mad->mad_hdr.method |=
739 memcpy(mad->data, rec->path_rec,
740 sizeof(rec->path_rec));
746 query->callback(query, status, mad);
749 mad_send_wc.send_buf = query->mad_buf;
750 mad_send_wc.status = IB_WC_SUCCESS;
751 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
754 static void ib_nl_request_timeout(struct work_struct *work)
757 struct ib_sa_query *query;
759 struct ib_mad_send_wc mad_send_wc;
762 spin_lock_irqsave(&ib_nl_request_lock, flags);
763 while (!list_empty(&ib_nl_request_list)) {
764 query = list_entry(ib_nl_request_list.next,
765 struct ib_sa_query, list);
767 if (time_after(query->timeout, jiffies)) {
768 delay = query->timeout - jiffies;
769 if ((long)delay <= 0)
771 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
775 list_del(&query->list);
776 ib_sa_disable_local_svc(query);
777 /* Hold the lock to protect against query cancellation */
778 if (ib_sa_query_cancelled(query))
781 ret = ib_post_send_mad(query->mad_buf, NULL);
783 mad_send_wc.send_buf = query->mad_buf;
784 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
785 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
786 send_handler(query->port->agent, &mad_send_wc);
787 spin_lock_irqsave(&ib_nl_request_lock, flags);
790 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
793 int ib_nl_handle_set_timeout(struct sk_buff *skb,
794 struct netlink_callback *cb)
796 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
797 int timeout, delta, abs_delta;
798 const struct nlattr *attr;
800 struct ib_sa_query *query;
802 struct nlattr *tb[LS_NLA_TYPE_MAX];
805 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
806 !(NETLINK_CB(skb).sk) ||
807 !netlink_capable(skb, CAP_NET_ADMIN))
810 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
811 nlmsg_len(nlh), ib_nl_policy, NULL);
812 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
816 timeout = *(int *) nla_data(attr);
817 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
818 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
819 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
820 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
822 delta = timeout - sa_local_svc_timeout_ms;
829 spin_lock_irqsave(&ib_nl_request_lock, flags);
830 sa_local_svc_timeout_ms = timeout;
831 list_for_each_entry(query, &ib_nl_request_list, list) {
832 if (delta < 0 && abs_delta > query->timeout)
835 query->timeout += delta;
837 /* Get the new delay from the first entry */
839 delay = query->timeout - jiffies;
845 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
846 (unsigned long)delay);
847 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
854 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
856 struct nlattr *tb[LS_NLA_TYPE_MAX];
859 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
862 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
863 nlmsg_len(nlh), ib_nl_policy, NULL);
870 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
871 struct netlink_callback *cb)
873 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
875 struct ib_sa_query *query;
876 struct ib_mad_send_buf *send_buf;
877 struct ib_mad_send_wc mad_send_wc;
881 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
882 !(NETLINK_CB(skb).sk) ||
883 !netlink_capable(skb, CAP_NET_ADMIN))
886 spin_lock_irqsave(&ib_nl_request_lock, flags);
887 list_for_each_entry(query, &ib_nl_request_list, list) {
889 * If the query is cancelled, let the timeout routine
892 if (nlh->nlmsg_seq == query->seq) {
893 found = !ib_sa_query_cancelled(query);
895 list_del(&query->list);
901 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
905 send_buf = query->mad_buf;
907 if (!ib_nl_is_good_resolve_resp(nlh)) {
908 /* if the result is a failure, send out the packet via IB */
909 ib_sa_disable_local_svc(query);
910 ret = ib_post_send_mad(query->mad_buf, NULL);
911 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
913 mad_send_wc.send_buf = send_buf;
914 mad_send_wc.status = IB_WC_GENERAL_ERR;
915 send_handler(query->port->agent, &mad_send_wc);
918 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
919 ib_nl_process_good_resolve_rsp(query, nlh);
926 static void free_sm_ah(struct kref *kref)
928 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
930 ib_destroy_ah(sm_ah->ah);
934 static void update_sm_ah(struct work_struct *work)
936 struct ib_sa_port *port =
937 container_of(work, struct ib_sa_port, update_task);
938 struct ib_sa_sm_ah *new_ah;
939 struct ib_port_attr port_attr;
940 struct ib_ah_attr ah_attr;
942 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
943 pr_warn("Couldn't query port\n");
947 new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
952 kref_init(&new_ah->ref);
953 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
955 new_ah->pkey_index = 0;
956 if (ib_find_pkey(port->agent->device, port->port_num,
957 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
958 pr_err("Couldn't find index for default PKey\n");
960 memset(&ah_attr, 0, sizeof(ah_attr));
961 ah_attr.dlid = port_attr.sm_lid;
962 ah_attr.sl = port_attr.sm_sl;
963 ah_attr.port_num = port->port_num;
964 if (port_attr.grh_required) {
965 ah_attr.ah_flags = IB_AH_GRH;
966 ah_attr.grh.dgid.global.subnet_prefix =
967 cpu_to_be64(port_attr.subnet_prefix);
968 ah_attr.grh.dgid.global.interface_id =
969 cpu_to_be64(IB_SA_WELL_KNOWN_GUID);
972 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
973 if (IS_ERR(new_ah->ah)) {
974 pr_warn("Couldn't create new SM AH\n");
979 spin_lock_irq(&port->ah_lock);
981 kref_put(&port->sm_ah->ref, free_sm_ah);
982 port->sm_ah = new_ah;
983 spin_unlock_irq(&port->ah_lock);
986 static void ib_sa_event(struct ib_event_handler *handler,
987 struct ib_event *event)
989 if (event->event == IB_EVENT_PORT_ERR ||
990 event->event == IB_EVENT_PORT_ACTIVE ||
991 event->event == IB_EVENT_LID_CHANGE ||
992 event->event == IB_EVENT_PKEY_CHANGE ||
993 event->event == IB_EVENT_SM_CHANGE ||
994 event->event == IB_EVENT_CLIENT_REREGISTER) {
996 struct ib_sa_device *sa_dev =
997 container_of(handler, typeof(*sa_dev), event_handler);
998 u8 port_num = event->element.port_num - sa_dev->start_port;
999 struct ib_sa_port *port = &sa_dev->port[port_num];
1001 if (!rdma_cap_ib_sa(handler->device, port->port_num))
1004 spin_lock_irqsave(&port->ah_lock, flags);
1006 kref_put(&port->sm_ah->ref, free_sm_ah);
1008 spin_unlock_irqrestore(&port->ah_lock, flags);
1010 if (event->event == IB_EVENT_SM_CHANGE ||
1011 event->event == IB_EVENT_CLIENT_REREGISTER ||
1012 event->event == IB_EVENT_LID_CHANGE) {
1013 spin_lock_irqsave(&port->classport_lock, flags);
1014 port->classport_info.valid = false;
1015 spin_unlock_irqrestore(&port->classport_lock, flags);
1017 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
1021 void ib_sa_register_client(struct ib_sa_client *client)
1023 atomic_set(&client->users, 1);
1024 init_completion(&client->comp);
1026 EXPORT_SYMBOL(ib_sa_register_client);
1028 void ib_sa_unregister_client(struct ib_sa_client *client)
1030 ib_sa_client_put(client);
1031 wait_for_completion(&client->comp);
1033 EXPORT_SYMBOL(ib_sa_unregister_client);
1036 * ib_sa_cancel_query - try to cancel an SA query
1037 * @id:ID of query to cancel
1038 * @query:query pointer to cancel
1040 * Try to cancel an SA query. If the id and query don't match up or
1041 * the query has already completed, nothing is done. Otherwise the
1042 * query is canceled and will complete with a status of -EINTR.
1044 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1046 unsigned long flags;
1047 struct ib_mad_agent *agent;
1048 struct ib_mad_send_buf *mad_buf;
1050 spin_lock_irqsave(&idr_lock, flags);
1051 if (idr_find(&query_idr, id) != query) {
1052 spin_unlock_irqrestore(&idr_lock, flags);
1055 agent = query->port->agent;
1056 mad_buf = query->mad_buf;
1057 spin_unlock_irqrestore(&idr_lock, flags);
1060 * If the query is still on the netlink request list, schedule
1061 * it to be cancelled by the timeout routine. Otherwise, it has been
1062 * sent to the MAD layer and has to be cancelled from there.
1064 if (!ib_nl_cancel_request(query))
1065 ib_cancel_mad(agent, mad_buf);
1067 EXPORT_SYMBOL(ib_sa_cancel_query);
1069 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1071 struct ib_sa_device *sa_dev;
1072 struct ib_sa_port *port;
1073 unsigned long flags;
1076 sa_dev = ib_get_client_data(device, &sa_client);
1080 port = &sa_dev->port[port_num - sa_dev->start_port];
1081 spin_lock_irqsave(&port->ah_lock, flags);
1082 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1083 spin_unlock_irqrestore(&port->ah_lock, flags);
1085 return src_path_mask;
1088 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1089 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
1094 struct net_device *ndev = NULL;
1096 memset(ah_attr, 0, sizeof *ah_attr);
1097 ah_attr->dlid = be16_to_cpu(rec->dlid);
1098 ah_attr->sl = rec->sl;
1099 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
1100 get_src_path_mask(device, port_num);
1101 ah_attr->port_num = port_num;
1102 ah_attr->static_rate = rec->rate;
1104 use_roce = rdma_cap_eth_ah(device, port_num);
1107 struct net_device *idev;
1108 struct net_device *resolved_dev;
1109 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex,
1110 .net = rec->net ? rec->net :
1113 struct sockaddr _sockaddr;
1114 struct sockaddr_in _sockaddr_in;
1115 struct sockaddr_in6 _sockaddr_in6;
1116 } sgid_addr, dgid_addr;
1118 if (!device->get_netdev)
1121 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1122 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1124 /* validate the route */
1125 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1126 &dgid_addr._sockaddr, &dev_addr);
1130 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1131 dev_addr.network == RDMA_NETWORK_IPV6) &&
1132 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP)
1135 idev = device->get_netdev(device, port_num);
1139 resolved_dev = dev_get_by_index(dev_addr.net,
1140 dev_addr.bound_dev_if);
1141 if (resolved_dev->flags & IFF_LOOPBACK) {
1142 dev_put(resolved_dev);
1143 resolved_dev = idev;
1144 dev_hold(resolved_dev);
1146 ndev = ib_get_ndev_from_path(rec);
1148 if ((ndev && ndev != resolved_dev) ||
1149 (resolved_dev != idev &&
1150 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1151 ret = -EHOSTUNREACH;
1154 dev_put(resolved_dev);
1162 if (rec->hop_limit > 0 || use_roce) {
1163 ah_attr->ah_flags = IB_AH_GRH;
1164 ah_attr->grh.dgid = rec->dgid;
1166 ret = ib_find_cached_gid_by_port(device, &rec->sgid,
1167 rec->gid_type, port_num, ndev,
1175 ah_attr->grh.sgid_index = gid_index;
1176 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
1177 ah_attr->grh.hop_limit = rec->hop_limit;
1178 ah_attr->grh.traffic_class = rec->traffic_class;
1184 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
1188 EXPORT_SYMBOL(ib_init_ah_from_path);
1190 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1192 unsigned long flags;
1194 spin_lock_irqsave(&query->port->ah_lock, flags);
1195 if (!query->port->sm_ah) {
1196 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1199 kref_get(&query->port->sm_ah->ref);
1200 query->sm_ah = query->port->sm_ah;
1201 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1203 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1204 query->sm_ah->pkey_index,
1205 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1207 IB_MGMT_BASE_VERSION);
1208 if (IS_ERR(query->mad_buf)) {
1209 kref_put(&query->sm_ah->ref, free_sm_ah);
1213 query->mad_buf->ah = query->sm_ah->ah;
1218 static void free_mad(struct ib_sa_query *query)
1220 ib_free_send_mad(query->mad_buf);
1221 kref_put(&query->sm_ah->ref, free_sm_ah);
1224 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
1226 unsigned long flags;
1228 memset(mad, 0, sizeof *mad);
1230 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1231 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1232 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1234 spin_lock_irqsave(&tid_lock, flags);
1236 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1237 spin_unlock_irqrestore(&tid_lock, flags);
1240 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1242 bool preload = gfpflags_allow_blocking(gfp_mask);
1243 unsigned long flags;
1247 idr_preload(gfp_mask);
1248 spin_lock_irqsave(&idr_lock, flags);
1250 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1252 spin_unlock_irqrestore(&idr_lock, flags);
1258 query->mad_buf->timeout_ms = timeout_ms;
1259 query->mad_buf->context[0] = query;
1262 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
1263 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
1264 if (!ib_nl_make_request(query, gfp_mask))
1267 ib_sa_disable_local_svc(query);
1270 ret = ib_post_send_mad(query->mad_buf, NULL);
1272 spin_lock_irqsave(&idr_lock, flags);
1273 idr_remove(&query_idr, id);
1274 spin_unlock_irqrestore(&idr_lock, flags);
1278 * It's not safe to dereference query any more, because the
1279 * send may already have completed and freed the query in
1282 return ret ? ret : id;
1285 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
1287 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1289 EXPORT_SYMBOL(ib_sa_unpack_path);
1291 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
1293 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1295 EXPORT_SYMBOL(ib_sa_pack_path);
1297 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1299 struct ib_sa_mad *mad)
1301 struct ib_sa_path_query *query =
1302 container_of(sa_query, struct ib_sa_path_query, sa_query);
1305 struct ib_sa_path_rec rec;
1307 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
1311 rec.gid_type = IB_GID_TYPE_IB;
1312 eth_zero_addr(rec.dmac);
1313 query->callback(status, &rec, query->context);
1315 query->callback(status, NULL, query->context);
1318 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1320 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
1324 * ib_sa_path_rec_get - Start a Path get query
1326 * @device:device to send query on
1327 * @port_num: port number to send query on
1328 * @rec:Path Record to send in query
1329 * @comp_mask:component mask to send in query
1330 * @timeout_ms:time to wait for response
1331 * @gfp_mask:GFP mask to use for internal allocations
1332 * @callback:function called when query completes, times out or is
1334 * @context:opaque user context passed to callback
1335 * @sa_query:query context, used to cancel query
1337 * Send a Path Record Get query to the SA to look up a path. The
1338 * callback function will be called when the query completes (or
1339 * fails); status is 0 for a successful response, -EINTR if the query
1340 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1341 * occurred sending the query. The resp parameter of the callback is
1342 * only valid if status is 0.
1344 * If the return value of ib_sa_path_rec_get() is negative, it is an
1345 * error code. Otherwise it is a query ID that can be used to cancel
1348 int ib_sa_path_rec_get(struct ib_sa_client *client,
1349 struct ib_device *device, u8 port_num,
1350 struct ib_sa_path_rec *rec,
1351 ib_sa_comp_mask comp_mask,
1352 int timeout_ms, gfp_t gfp_mask,
1353 void (*callback)(int status,
1354 struct ib_sa_path_rec *resp,
1357 struct ib_sa_query **sa_query)
1359 struct ib_sa_path_query *query;
1360 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1361 struct ib_sa_port *port;
1362 struct ib_mad_agent *agent;
1363 struct ib_sa_mad *mad;
1369 port = &sa_dev->port[port_num - sa_dev->start_port];
1370 agent = port->agent;
1372 query = kzalloc(sizeof(*query), gfp_mask);
1376 query->sa_query.port = port;
1377 ret = alloc_mad(&query->sa_query, gfp_mask);
1381 ib_sa_client_get(client);
1382 query->sa_query.client = client;
1383 query->callback = callback;
1384 query->context = context;
1386 mad = query->sa_query.mad_buf->mad;
1387 init_mad(mad, agent);
1389 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1390 query->sa_query.release = ib_sa_path_rec_release;
1391 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1392 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1393 mad->sa_hdr.comp_mask = comp_mask;
1395 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1397 *sa_query = &query->sa_query;
1399 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1400 query->sa_query.mad_buf->context[1] = rec;
1402 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1410 ib_sa_client_put(query->sa_query.client);
1411 free_mad(&query->sa_query);
1417 EXPORT_SYMBOL(ib_sa_path_rec_get);
1419 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1421 struct ib_sa_mad *mad)
1423 struct ib_sa_service_query *query =
1424 container_of(sa_query, struct ib_sa_service_query, sa_query);
1427 struct ib_sa_service_rec rec;
1429 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1431 query->callback(status, &rec, query->context);
1433 query->callback(status, NULL, query->context);
1436 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1438 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1442 * ib_sa_service_rec_query - Start Service Record operation
1444 * @device:device to send request on
1445 * @port_num: port number to send request on
1446 * @method:SA method - should be get, set, or delete
1447 * @rec:Service Record to send in request
1448 * @comp_mask:component mask to send in request
1449 * @timeout_ms:time to wait for response
1450 * @gfp_mask:GFP mask to use for internal allocations
1451 * @callback:function called when request completes, times out or is
1453 * @context:opaque user context passed to callback
1454 * @sa_query:request context, used to cancel request
1456 * Send a Service Record set/get/delete to the SA to register,
1457 * unregister or query a service record.
1458 * The callback function will be called when the request completes (or
1459 * fails); status is 0 for a successful response, -EINTR if the query
1460 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1461 * occurred sending the query. The resp parameter of the callback is
1462 * only valid if status is 0.
1464 * If the return value of ib_sa_service_rec_query() is negative, it is an
1465 * error code. Otherwise it is a request ID that can be used to cancel
1468 int ib_sa_service_rec_query(struct ib_sa_client *client,
1469 struct ib_device *device, u8 port_num, u8 method,
1470 struct ib_sa_service_rec *rec,
1471 ib_sa_comp_mask comp_mask,
1472 int timeout_ms, gfp_t gfp_mask,
1473 void (*callback)(int status,
1474 struct ib_sa_service_rec *resp,
1477 struct ib_sa_query **sa_query)
1479 struct ib_sa_service_query *query;
1480 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1481 struct ib_sa_port *port;
1482 struct ib_mad_agent *agent;
1483 struct ib_sa_mad *mad;
1489 port = &sa_dev->port[port_num - sa_dev->start_port];
1490 agent = port->agent;
1492 if (method != IB_MGMT_METHOD_GET &&
1493 method != IB_MGMT_METHOD_SET &&
1494 method != IB_SA_METHOD_DELETE)
1497 query = kzalloc(sizeof(*query), gfp_mask);
1501 query->sa_query.port = port;
1502 ret = alloc_mad(&query->sa_query, gfp_mask);
1506 ib_sa_client_get(client);
1507 query->sa_query.client = client;
1508 query->callback = callback;
1509 query->context = context;
1511 mad = query->sa_query.mad_buf->mad;
1512 init_mad(mad, agent);
1514 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1515 query->sa_query.release = ib_sa_service_rec_release;
1516 mad->mad_hdr.method = method;
1517 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1518 mad->sa_hdr.comp_mask = comp_mask;
1520 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1523 *sa_query = &query->sa_query;
1525 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1533 ib_sa_client_put(query->sa_query.client);
1534 free_mad(&query->sa_query);
1540 EXPORT_SYMBOL(ib_sa_service_rec_query);
1542 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1544 struct ib_sa_mad *mad)
1546 struct ib_sa_mcmember_query *query =
1547 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1550 struct ib_sa_mcmember_rec rec;
1552 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1554 query->callback(status, &rec, query->context);
1556 query->callback(status, NULL, query->context);
1559 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1561 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1564 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1565 struct ib_device *device, u8 port_num,
1567 struct ib_sa_mcmember_rec *rec,
1568 ib_sa_comp_mask comp_mask,
1569 int timeout_ms, gfp_t gfp_mask,
1570 void (*callback)(int status,
1571 struct ib_sa_mcmember_rec *resp,
1574 struct ib_sa_query **sa_query)
1576 struct ib_sa_mcmember_query *query;
1577 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1578 struct ib_sa_port *port;
1579 struct ib_mad_agent *agent;
1580 struct ib_sa_mad *mad;
1586 port = &sa_dev->port[port_num - sa_dev->start_port];
1587 agent = port->agent;
1589 query = kzalloc(sizeof(*query), gfp_mask);
1593 query->sa_query.port = port;
1594 ret = alloc_mad(&query->sa_query, gfp_mask);
1598 ib_sa_client_get(client);
1599 query->sa_query.client = client;
1600 query->callback = callback;
1601 query->context = context;
1603 mad = query->sa_query.mad_buf->mad;
1604 init_mad(mad, agent);
1606 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1607 query->sa_query.release = ib_sa_mcmember_rec_release;
1608 mad->mad_hdr.method = method;
1609 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1610 mad->sa_hdr.comp_mask = comp_mask;
1612 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1615 *sa_query = &query->sa_query;
1617 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1625 ib_sa_client_put(query->sa_query.client);
1626 free_mad(&query->sa_query);
1633 /* Support GuidInfoRecord */
1634 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1636 struct ib_sa_mad *mad)
1638 struct ib_sa_guidinfo_query *query =
1639 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1642 struct ib_sa_guidinfo_rec rec;
1644 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1646 query->callback(status, &rec, query->context);
1648 query->callback(status, NULL, query->context);
1651 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1653 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1656 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1657 struct ib_device *device, u8 port_num,
1658 struct ib_sa_guidinfo_rec *rec,
1659 ib_sa_comp_mask comp_mask, u8 method,
1660 int timeout_ms, gfp_t gfp_mask,
1661 void (*callback)(int status,
1662 struct ib_sa_guidinfo_rec *resp,
1665 struct ib_sa_query **sa_query)
1667 struct ib_sa_guidinfo_query *query;
1668 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1669 struct ib_sa_port *port;
1670 struct ib_mad_agent *agent;
1671 struct ib_sa_mad *mad;
1677 if (method != IB_MGMT_METHOD_GET &&
1678 method != IB_MGMT_METHOD_SET &&
1679 method != IB_SA_METHOD_DELETE) {
1683 port = &sa_dev->port[port_num - sa_dev->start_port];
1684 agent = port->agent;
1686 query = kzalloc(sizeof(*query), gfp_mask);
1690 query->sa_query.port = port;
1691 ret = alloc_mad(&query->sa_query, gfp_mask);
1695 ib_sa_client_get(client);
1696 query->sa_query.client = client;
1697 query->callback = callback;
1698 query->context = context;
1700 mad = query->sa_query.mad_buf->mad;
1701 init_mad(mad, agent);
1703 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1704 query->sa_query.release = ib_sa_guidinfo_rec_release;
1706 mad->mad_hdr.method = method;
1707 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1708 mad->sa_hdr.comp_mask = comp_mask;
1710 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1713 *sa_query = &query->sa_query;
1715 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1723 ib_sa_client_put(query->sa_query.client);
1724 free_mad(&query->sa_query);
1730 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1732 /* Support get SA ClassPortInfo */
1733 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1735 struct ib_sa_mad *mad)
1737 unsigned long flags;
1738 struct ib_sa_classport_info_query *query =
1739 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
1742 struct ib_class_port_info rec;
1744 ib_unpack(classport_info_rec_table,
1745 ARRAY_SIZE(classport_info_rec_table),
1748 spin_lock_irqsave(&sa_query->port->classport_lock, flags);
1749 if (!status && !sa_query->port->classport_info.valid) {
1750 memcpy(&sa_query->port->classport_info.data, &rec,
1751 sizeof(sa_query->port->classport_info.data));
1753 sa_query->port->classport_info.valid = true;
1755 spin_unlock_irqrestore(&sa_query->port->classport_lock, flags);
1757 query->callback(status, &rec, query->context);
1759 query->callback(status, NULL, query->context);
1763 static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query)
1765 kfree(container_of(sa_query, struct ib_sa_classport_info_query,
1769 int ib_sa_classport_info_rec_query(struct ib_sa_client *client,
1770 struct ib_device *device, u8 port_num,
1771 int timeout_ms, gfp_t gfp_mask,
1772 void (*callback)(int status,
1773 struct ib_class_port_info *resp,
1776 struct ib_sa_query **sa_query)
1778 struct ib_sa_classport_info_query *query;
1779 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1780 struct ib_sa_port *port;
1781 struct ib_mad_agent *agent;
1782 struct ib_sa_mad *mad;
1783 struct ib_class_port_info cached_class_port_info;
1785 unsigned long flags;
1790 port = &sa_dev->port[port_num - sa_dev->start_port];
1791 agent = port->agent;
1793 /* Use cached ClassPortInfo attribute if valid instead of sending mad */
1794 spin_lock_irqsave(&port->classport_lock, flags);
1795 if (port->classport_info.valid && callback) {
1796 memcpy(&cached_class_port_info, &port->classport_info.data,
1797 sizeof(cached_class_port_info));
1798 spin_unlock_irqrestore(&port->classport_lock, flags);
1799 callback(0, &cached_class_port_info, context);
1802 spin_unlock_irqrestore(&port->classport_lock, flags);
1804 query = kzalloc(sizeof(*query), gfp_mask);
1808 query->sa_query.port = port;
1809 ret = alloc_mad(&query->sa_query, gfp_mask);
1813 ib_sa_client_get(client);
1814 query->sa_query.client = client;
1815 query->callback = callback;
1816 query->context = context;
1818 mad = query->sa_query.mad_buf->mad;
1819 init_mad(mad, agent);
1821 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL;
1823 query->sa_query.release = ib_sa_portclass_info_rec_release;
1824 /* support GET only */
1825 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1826 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
1827 mad->sa_hdr.comp_mask = 0;
1828 *sa_query = &query->sa_query;
1830 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1838 ib_sa_client_put(query->sa_query.client);
1839 free_mad(&query->sa_query);
1845 EXPORT_SYMBOL(ib_sa_classport_info_rec_query);
1847 static void send_handler(struct ib_mad_agent *agent,
1848 struct ib_mad_send_wc *mad_send_wc)
1850 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1851 unsigned long flags;
1853 if (query->callback)
1854 switch (mad_send_wc->status) {
1856 /* No callback -- already got recv */
1858 case IB_WC_RESP_TIMEOUT_ERR:
1859 query->callback(query, -ETIMEDOUT, NULL);
1861 case IB_WC_WR_FLUSH_ERR:
1862 query->callback(query, -EINTR, NULL);
1865 query->callback(query, -EIO, NULL);
1869 spin_lock_irqsave(&idr_lock, flags);
1870 idr_remove(&query_idr, query->id);
1871 spin_unlock_irqrestore(&idr_lock, flags);
1874 ib_sa_client_put(query->client);
1875 query->release(query);
1878 static void recv_handler(struct ib_mad_agent *mad_agent,
1879 struct ib_mad_send_buf *send_buf,
1880 struct ib_mad_recv_wc *mad_recv_wc)
1882 struct ib_sa_query *query;
1887 query = send_buf->context[0];
1888 if (query->callback) {
1889 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1890 query->callback(query,
1891 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1893 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1895 query->callback(query, -EIO, NULL);
1898 ib_free_recv_mad(mad_recv_wc);
1901 static void ib_sa_add_one(struct ib_device *device)
1903 struct ib_sa_device *sa_dev;
1907 s = rdma_start_port(device);
1908 e = rdma_end_port(device);
1910 sa_dev = kzalloc(sizeof *sa_dev +
1911 (e - s + 1) * sizeof (struct ib_sa_port),
1916 sa_dev->start_port = s;
1917 sa_dev->end_port = e;
1919 for (i = 0; i <= e - s; ++i) {
1920 spin_lock_init(&sa_dev->port[i].ah_lock);
1921 if (!rdma_cap_ib_sa(device, i + 1))
1924 sa_dev->port[i].sm_ah = NULL;
1925 sa_dev->port[i].port_num = i + s;
1927 spin_lock_init(&sa_dev->port[i].classport_lock);
1928 sa_dev->port[i].classport_info.valid = false;
1930 sa_dev->port[i].agent =
1931 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1932 NULL, 0, send_handler,
1933 recv_handler, sa_dev, 0);
1934 if (IS_ERR(sa_dev->port[i].agent))
1937 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1945 ib_set_client_data(device, &sa_client, sa_dev);
1948 * We register our event handler after everything is set up,
1949 * and then update our cached info after the event handler is
1950 * registered to avoid any problems if a port changes state
1951 * during our initialization.
1954 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1955 if (ib_register_event_handler(&sa_dev->event_handler))
1958 for (i = 0; i <= e - s; ++i) {
1959 if (rdma_cap_ib_sa(device, i + 1))
1960 update_sm_ah(&sa_dev->port[i].update_task);
1967 if (rdma_cap_ib_sa(device, i + 1))
1968 ib_unregister_mad_agent(sa_dev->port[i].agent);
1975 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1977 struct ib_sa_device *sa_dev = client_data;
1983 ib_unregister_event_handler(&sa_dev->event_handler);
1985 flush_workqueue(ib_wq);
1987 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1988 if (rdma_cap_ib_sa(device, i + 1)) {
1989 ib_unregister_mad_agent(sa_dev->port[i].agent);
1990 if (sa_dev->port[i].sm_ah)
1991 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1999 int ib_sa_init(void)
2003 get_random_bytes(&tid, sizeof tid);
2005 atomic_set(&ib_nl_sa_request_seq, 0);
2007 ret = ib_register_client(&sa_client);
2009 pr_err("Couldn't register ib_sa client\n");
2015 pr_err("Couldn't initialize multicast handling\n");
2019 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2025 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2032 ib_unregister_client(&sa_client);
2037 void ib_sa_cleanup(void)
2039 cancel_delayed_work(&ib_nl_timed_work);
2040 flush_workqueue(ib_nl_wq);
2041 destroy_workqueue(ib_nl_wq);
2043 ib_unregister_client(&sa_client);
2044 idr_destroy(&query_idr);