/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Voltaire, Inc. All rights reserved. * Copyright (c) 2006 Intel Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sa.h" #include "core_priv.h" MODULE_AUTHOR("Roland Dreier"); MODULE_DESCRIPTION("InfiniBand subnet administration query support"); MODULE_LICENSE("Dual BSD/GPL"); #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT; struct ib_sa_sm_ah { struct ib_ah *ah; struct kref ref; u16 pkey_index; u8 src_path_mask; }; struct ib_sa_port { struct ib_mad_agent *agent; struct ib_sa_sm_ah *sm_ah; struct work_struct update_task; spinlock_t ah_lock; u8 port_num; }; struct ib_sa_device { int start_port, end_port; struct ib_event_handler event_handler; struct ib_sa_port port[0]; }; struct ib_sa_query { void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); void (*release)(struct ib_sa_query *); struct ib_sa_client *client; struct ib_sa_port *port; struct ib_mad_send_buf *mad_buf; struct ib_sa_sm_ah *sm_ah; int id; u32 flags; struct list_head list; /* Local svc request list */ u32 seq; /* Local svc request sequence number */ unsigned long timeout; /* Local svc timeout */ u8 path_use; /* How will the pathrecord be used */ }; #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001 #define IB_SA_CANCEL 0x00000002 struct ib_sa_service_query { void (*callback)(int, struct ib_sa_service_rec *, void *); void *context; struct ib_sa_query sa_query; }; struct ib_sa_path_query { void (*callback)(int, struct ib_sa_path_rec *, void *); void *context; struct ib_sa_query sa_query; }; struct ib_sa_guidinfo_query { void (*callback)(int, struct ib_sa_guidinfo_rec *, void *); void *context; struct ib_sa_query sa_query; }; struct ib_sa_mcmember_query { void (*callback)(int, struct ib_sa_mcmember_rec *, void *); void *context; struct ib_sa_query sa_query; }; static LIST_HEAD(ib_nl_request_list); static DEFINE_SPINLOCK(ib_nl_request_lock); static atomic_t ib_nl_sa_request_seq; static struct workqueue_struct *ib_nl_wq; static struct delayed_work ib_nl_timed_work; static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = { [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY, .len = sizeof(struct ib_path_rec_data)}, [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32}, [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64}, [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY, .len = sizeof(struct rdma_nla_ls_gid)}, [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY, .len = sizeof(struct rdma_nla_ls_gid)}, [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8}, [LS_NLA_TYPE_PKEY] = {.type = NLA_U16}, [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16}, }; static void ib_sa_add_one(struct ib_device *device); static void ib_sa_remove_one(struct ib_device *device, void *client_data); static struct ib_client sa_client = { .name = "sa", .add = ib_sa_add_one, .remove = ib_sa_remove_one }; static DEFINE_SPINLOCK(idr_lock); static DEFINE_IDR(query_idr); static DEFINE_SPINLOCK(tid_lock); static u32 tid; #define PATH_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ .field_name = "sa_path_rec:" #field static const struct ib_field path_rec_table[] = { { PATH_REC_FIELD(service_id), .offset_words = 0, .offset_bits = 0, .size_bits = 64 }, { PATH_REC_FIELD(dgid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { PATH_REC_FIELD(sgid), .offset_words = 6, .offset_bits = 0, .size_bits = 128 }, { PATH_REC_FIELD(dlid), .offset_words = 10, .offset_bits = 0, .size_bits = 16 }, { PATH_REC_FIELD(slid), .offset_words = 10, .offset_bits = 16, .size_bits = 16 }, { PATH_REC_FIELD(raw_traffic), .offset_words = 11, .offset_bits = 0, .size_bits = 1 }, { RESERVED, .offset_words = 11, .offset_bits = 1, .size_bits = 3 }, { PATH_REC_FIELD(flow_label), .offset_words = 11, .offset_bits = 4, .size_bits = 20 }, { PATH_REC_FIELD(hop_limit), .offset_words = 11, .offset_bits = 24, .size_bits = 8 }, { PATH_REC_FIELD(traffic_class), .offset_words = 12, .offset_bits = 0, .size_bits = 8 }, { PATH_REC_FIELD(reversible), .offset_words = 12, .offset_bits = 8, .size_bits = 1 }, { PATH_REC_FIELD(numb_path), .offset_words = 12, .offset_bits = 9, .size_bits = 7 }, { PATH_REC_FIELD(pkey), .offset_words = 12, .offset_bits = 16, .size_bits = 16 }, { PATH_REC_FIELD(qos_class), .offset_words = 13, .offset_bits = 0, .size_bits = 12 }, { PATH_REC_FIELD(sl), .offset_words = 13, .offset_bits = 12, .size_bits = 4 }, { PATH_REC_FIELD(mtu_selector), .offset_words = 13, .offset_bits = 16, .size_bits = 2 }, { PATH_REC_FIELD(mtu), .offset_words = 13, .offset_bits = 18, .size_bits = 6 }, { PATH_REC_FIELD(rate_selector), .offset_words = 13, .offset_bits = 24, .size_bits = 2 }, { PATH_REC_FIELD(rate), .offset_words = 13, .offset_bits = 26, .size_bits = 6 }, { PATH_REC_FIELD(packet_life_time_selector), .offset_words = 14, .offset_bits = 0, .size_bits = 2 }, { PATH_REC_FIELD(packet_life_time), .offset_words = 14, .offset_bits = 2, .size_bits = 6 }, { PATH_REC_FIELD(preference), .offset_words = 14, .offset_bits = 8, .size_bits = 8 }, { RESERVED, .offset_words = 14, .offset_bits = 16, .size_bits = 48 }, }; #define MCMEMBER_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ .field_name = "sa_mcmember_rec:" #field static const struct ib_field mcmember_rec_table[] = { { MCMEMBER_REC_FIELD(mgid), .offset_words = 0, .offset_bits = 0, .size_bits = 128 }, { MCMEMBER_REC_FIELD(port_gid), .offset_words = 4, .offset_bits = 0, .size_bits = 128 }, { MCMEMBER_REC_FIELD(qkey), .offset_words = 8, .offset_bits = 0, .size_bits = 32 }, { MCMEMBER_REC_FIELD(mlid), .offset_words = 9, .offset_bits = 0, .size_bits = 16 }, { MCMEMBER_REC_FIELD(mtu_selector), .offset_words = 9, .offset_bits = 16, .size_bits = 2 }, { MCMEMBER_REC_FIELD(mtu), .offset_words = 9, .offset_bits = 18, .size_bits = 6 }, { MCMEMBER_REC_FIELD(traffic_class), .offset_words = 9, .offset_bits = 24, .size_bits = 8 }, { MCMEMBER_REC_FIELD(pkey), .offset_words = 10, .offset_bits = 0, .size_bits = 16 }, { MCMEMBER_REC_FIELD(rate_selector), .offset_words = 10, .offset_bits = 16, .size_bits = 2 }, { MCMEMBER_REC_FIELD(rate), .offset_words = 10, .offset_bits = 18, .size_bits = 6 }, { MCMEMBER_REC_FIELD(packet_life_time_selector), .offset_words = 10, .offset_bits = 24, .size_bits = 2 }, { MCMEMBER_REC_FIELD(packet_life_time), .offset_words = 10, .offset_bits = 26, .size_bits = 6 }, { MCMEMBER_REC_FIELD(sl), .offset_words = 11, .offset_bits = 0, .size_bits = 4 }, { MCMEMBER_REC_FIELD(flow_label), .offset_words = 11, .offset_bits = 4, .size_bits = 20 }, { MCMEMBER_REC_FIELD(hop_limit), .offset_words = 11, .offset_bits = 24, .size_bits = 8 }, { MCMEMBER_REC_FIELD(scope), .offset_words = 12, .offset_bits = 0, .size_bits = 4 }, { MCMEMBER_REC_FIELD(join_state), .offset_words = 12, .offset_bits = 4, .size_bits = 4 }, { MCMEMBER_REC_FIELD(proxy_join), .offset_words = 12, .offset_bits = 8, .size_bits = 1 }, { RESERVED, .offset_words = 12, .offset_bits = 9, .size_bits = 23 }, }; #define SERVICE_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ .field_name = "sa_service_rec:" #field static const struct ib_field service_rec_table[] = { { SERVICE_REC_FIELD(id), .offset_words = 0, .offset_bits = 0, .size_bits = 64 }, { SERVICE_REC_FIELD(gid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { SERVICE_REC_FIELD(pkey), .offset_words = 6, .offset_bits = 0, .size_bits = 16 }, { SERVICE_REC_FIELD(lease), .offset_words = 7, .offset_bits = 0, .size_bits = 32 }, { SERVICE_REC_FIELD(key), .offset_words = 8, .offset_bits = 0, .size_bits = 128 }, { SERVICE_REC_FIELD(name), .offset_words = 12, .offset_bits = 0, .size_bits = 64*8 }, { SERVICE_REC_FIELD(data8), .offset_words = 28, .offset_bits = 0, .size_bits = 16*8 }, { SERVICE_REC_FIELD(data16), .offset_words = 32, .offset_bits = 0, .size_bits = 8*16 }, { SERVICE_REC_FIELD(data32), .offset_words = 36, .offset_bits = 0, .size_bits = 4*32 }, { SERVICE_REC_FIELD(data64), .offset_words = 40, .offset_bits = 0, .size_bits = 2*64 }, }; #define GUIDINFO_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \ .field_name = "sa_guidinfo_rec:" #field static const struct ib_field guidinfo_rec_table[] = { { GUIDINFO_REC_FIELD(lid), .offset_words = 0, .offset_bits = 0, .size_bits = 16 }, { GUIDINFO_REC_FIELD(block_num), .offset_words = 0, .offset_bits = 16, .size_bits = 8 }, { GUIDINFO_REC_FIELD(res1), .offset_words = 0, .offset_bits = 24, .size_bits = 8 }, { GUIDINFO_REC_FIELD(res2), .offset_words = 1, .offset_bits = 0, .size_bits = 32 }, { GUIDINFO_REC_FIELD(guid_info_list), .offset_words = 2, .offset_bits = 0, .size_bits = 512 }, }; static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) { query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; } static inline int ib_sa_query_cancelled(struct ib_sa_query *query) { return (query->flags & IB_SA_CANCEL); } static void ib_nl_set_path_rec_attrs(struct sk_buff *skb, struct ib_sa_query *query) { struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1]; struct ib_sa_mad *mad = query->mad_buf->mad; ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask; u16 val16; u64 val64; struct rdma_ls_resolve_header *header; query->mad_buf->context[1] = NULL; /* Construct the family header first */ header = (struct rdma_ls_resolve_header *) skb_put(skb, NLMSG_ALIGN(sizeof(*header))); memcpy(header->device_name, query->port->agent->device->name, LS_DEVICE_NAME_MAX); header->port_num = query->port->port_num; if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) && sa_rec->reversible != 0) query->path_use = LS_RESOLVE_PATH_USE_GMP; else query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL; header->path_use = query->path_use; /* Now build the attributes */ if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) { val64 = be64_to_cpu(sa_rec->service_id); nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID, sizeof(val64), &val64); } if (comp_mask & IB_SA_PATH_REC_DGID) nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID, sizeof(sa_rec->dgid), &sa_rec->dgid); if (comp_mask & IB_SA_PATH_REC_SGID) nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID, sizeof(sa_rec->sgid), &sa_rec->sgid); if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS, sizeof(sa_rec->traffic_class), &sa_rec->traffic_class); if (comp_mask & IB_SA_PATH_REC_PKEY) { val16 = be16_to_cpu(sa_rec->pkey); nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY, sizeof(val16), &val16); } if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) { val16 = be16_to_cpu(sa_rec->qos_class); nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS, sizeof(val16), &val16); } } static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask) { int len = 0; if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) len += nla_total_size(sizeof(u64)); if (comp_mask & IB_SA_PATH_REC_DGID) len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); if (comp_mask & IB_SA_PATH_REC_SGID) len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) len += nla_total_size(sizeof(u8)); if (comp_mask & IB_SA_PATH_REC_PKEY) len += nla_total_size(sizeof(u16)); if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) len += nla_total_size(sizeof(u16)); /* * Make sure that at least some of the required comp_mask bits are * set. */ if (WARN_ON(len == 0)) return len; /* Add the family header */ len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header)); return len; } static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask) { struct sk_buff *skb = NULL; struct nlmsghdr *nlh; void *data; int ret = 0; struct ib_sa_mad *mad; int len; mad = query->mad_buf->mad; len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask); if (len <= 0) return -EMSGSIZE; skb = nlmsg_new(len, gfp_mask); if (!skb) return -ENOMEM; /* Put nlmsg header only for now */ data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS, RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST); if (!data) { kfree_skb(skb); return -EMSGSIZE; } /* Add attributes */ ib_nl_set_path_rec_attrs(skb, query); /* Repair the nlmsg header length */ nlmsg_end(skb, nlh); ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask); if (!ret) ret = len; else ret = 0; return ret; } static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask) { unsigned long flags; unsigned long delay; int ret; INIT_LIST_HEAD(&query->list); query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq); /* Put the request on the list first.*/ spin_lock_irqsave(&ib_nl_request_lock, flags); delay = msecs_to_jiffies(sa_local_svc_timeout_ms); query->timeout = delay + jiffies; list_add_tail(&query->list, &ib_nl_request_list); /* Start the timeout if this is the only request */ if (ib_nl_request_list.next == &query->list) queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); spin_unlock_irqrestore(&ib_nl_request_lock, flags); ret = ib_nl_send_msg(query, gfp_mask); if (ret <= 0) { ret = -EIO; /* Remove the request */ spin_lock_irqsave(&ib_nl_request_lock, flags); list_del(&query->list); spin_unlock_irqrestore(&ib_nl_request_lock, flags); } else { ret = 0; } return ret; } static int ib_nl_cancel_request(struct ib_sa_query *query) { unsigned long flags; struct ib_sa_query *wait_query; int found = 0; spin_lock_irqsave(&ib_nl_request_lock, flags); list_for_each_entry(wait_query, &ib_nl_request_list, list) { /* Let the timeout to take care of the callback */ if (query == wait_query) { query->flags |= IB_SA_CANCEL; query->timeout = jiffies; list_move(&query->list, &ib_nl_request_list); found = 1; mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1); break; } } spin_unlock_irqrestore(&ib_nl_request_lock, flags); return found; } static void send_handler(struct ib_mad_agent *agent, struct ib_mad_send_wc *mad_send_wc); static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query, const struct nlmsghdr *nlh) { struct ib_mad_send_wc mad_send_wc; struct ib_sa_mad *mad = NULL; const struct nlattr *head, *curr; struct ib_path_rec_data *rec; int len, rem; u32 mask = 0; int status = -EIO; if (query->callback) { head = (const struct nlattr *) nlmsg_data(nlh); len = nlmsg_len(nlh); switch (query->path_use) { case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL: mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND; break; case LS_RESOLVE_PATH_USE_ALL: case LS_RESOLVE_PATH_USE_GMP: default: mask = IB_PATH_PRIMARY | IB_PATH_GMP | IB_PATH_BIDIRECTIONAL; break; } nla_for_each_attr(curr, head, len, rem) { if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) { rec = nla_data(curr); /* * Get the first one. In the future, we may * need to get up to 6 pathrecords. */ if ((rec->flags & mask) == mask) { mad = query->mad_buf->mad; mad->mad_hdr.method |= IB_MGMT_METHOD_RESP; memcpy(mad->data, rec->path_rec, sizeof(rec->path_rec)); status = 0; break; } } } query->callback(query, status, mad); } mad_send_wc.send_buf = query->mad_buf; mad_send_wc.status = IB_WC_SUCCESS; send_handler(query->mad_buf->mad_agent, &mad_send_wc); } static void ib_nl_request_timeout(struct work_struct *work) { unsigned long flags; struct ib_sa_query *query; unsigned long delay; struct ib_mad_send_wc mad_send_wc; int ret; spin_lock_irqsave(&ib_nl_request_lock, flags); while (!list_empty(&ib_nl_request_list)) { query = list_entry(ib_nl_request_list.next, struct ib_sa_query, list); if (time_after(query->timeout, jiffies)) { delay = query->timeout - jiffies; if ((long)delay <= 0) delay = 1; queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); break; } list_del(&query->list); ib_sa_disable_local_svc(query); /* Hold the lock to protect against query cancellation */ if (ib_sa_query_cancelled(query)) ret = -1; else ret = ib_post_send_mad(query->mad_buf, NULL); if (ret) { mad_send_wc.send_buf = query->mad_buf; mad_send_wc.status = IB_WC_WR_FLUSH_ERR; spin_unlock_irqrestore(&ib_nl_request_lock, flags); send_handler(query->port->agent, &mad_send_wc); spin_lock_irqsave(&ib_nl_request_lock, flags); } } spin_unlock_irqrestore(&ib_nl_request_lock, flags); } static int ib_nl_handle_set_timeout(struct sk_buff *skb, struct netlink_callback *cb) { const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh; int timeout, delta, abs_delta; const struct nlattr *attr; unsigned long flags; struct ib_sa_query *query; long delay = 0; struct nlattr *tb[LS_NLA_TYPE_MAX]; int ret; if (!(nlh->nlmsg_flags & NLM_F_REQUEST) || !(NETLINK_CB(skb).sk) || !netlink_capable(skb, CAP_NET_ADMIN)) return -EPERM; ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), nlmsg_len(nlh), ib_nl_policy); attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT]; if (ret || !attr) goto settimeout_out; timeout = *(int *) nla_data(attr); if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN) timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN; if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX) timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX; delta = timeout - sa_local_svc_timeout_ms; if (delta < 0) abs_delta = -delta; else abs_delta = delta; if (delta != 0) { spin_lock_irqsave(&ib_nl_request_lock, flags); sa_local_svc_timeout_ms = timeout; list_for_each_entry(query, &ib_nl_request_list, list) { if (delta < 0 && abs_delta > query->timeout) query->timeout = 0; else query->timeout += delta; /* Get the new delay from the first entry */ if (!delay) { delay = query->timeout - jiffies; if (delay <= 0) delay = 1; } } if (delay) mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, (unsigned long)delay); spin_unlock_irqrestore(&ib_nl_request_lock, flags); } settimeout_out: return skb->len; } static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh) { struct nlattr *tb[LS_NLA_TYPE_MAX]; int ret; if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR) return 0; ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), nlmsg_len(nlh), ib_nl_policy); if (ret) return 0; return 1; } static int ib_nl_handle_resolve_resp(struct sk_buff *skb, struct netlink_callback *cb) { const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh; unsigned long flags; struct ib_sa_query *query; struct ib_mad_send_buf *send_buf; struct ib_mad_send_wc mad_send_wc; int found = 0; int ret; if ((nlh->nlmsg_flags & NLM_F_REQUEST) || !(NETLINK_CB(skb).sk) || !netlink_capable(skb, CAP_NET_ADMIN)) return -EPERM; spin_lock_irqsave(&ib_nl_request_lock, flags); list_for_each_entry(query, &ib_nl_request_list, list) { /* * If the query is cancelled, let the timeout routine * take care of it. */ if (nlh->nlmsg_seq == query->seq) { found = !ib_sa_query_cancelled(query); if (found) list_del(&query->list); break; } } if (!found) { spin_unlock_irqrestore(&ib_nl_request_lock, flags); goto resp_out; } send_buf = query->mad_buf; if (!ib_nl_is_good_resolve_resp(nlh)) { /* if the result is a failure, send out the packet via IB */ ib_sa_disable_local_svc(query); ret = ib_post_send_mad(query->mad_buf, NULL); spin_unlock_irqrestore(&ib_nl_request_lock, flags); if (ret) { mad_send_wc.send_buf = send_buf; mad_send_wc.status = IB_WC_GENERAL_ERR; send_handler(query->port->agent, &mad_send_wc); } } else { spin_unlock_irqrestore(&ib_nl_request_lock, flags); ib_nl_process_good_resolve_rsp(query, nlh); } resp_out: return skb->len; } static struct ibnl_client_cbs ib_sa_cb_table[] = { [RDMA_NL_LS_OP_RESOLVE] = { .dump = ib_nl_handle_resolve_resp, .module = THIS_MODULE }, [RDMA_NL_LS_OP_SET_TIMEOUT] = { .dump = ib_nl_handle_set_timeout, .module = THIS_MODULE }, }; static void free_sm_ah(struct kref *kref) { struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); ib_destroy_ah(sm_ah->ah); kfree(sm_ah); } static void update_sm_ah(struct work_struct *work) { struct ib_sa_port *port = container_of(work, struct ib_sa_port, update_task); struct ib_sa_sm_ah *new_ah; struct ib_port_attr port_attr; struct ib_ah_attr ah_attr; if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { pr_warn("Couldn't query port\n"); return; } new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); if (!new_ah) { return; } kref_init(&new_ah->ref); new_ah->src_path_mask = (1 << port_attr.lmc) - 1; new_ah->pkey_index = 0; if (ib_find_pkey(port->agent->device, port->port_num, IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index)) pr_err("Couldn't find index for default PKey\n"); memset(&ah_attr, 0, sizeof ah_attr); ah_attr.dlid = port_attr.sm_lid; ah_attr.sl = port_attr.sm_sl; ah_attr.port_num = port->port_num; if (port_attr.grh_required) { ah_attr.ah_flags = IB_AH_GRH; ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix); ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID); } new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); if (IS_ERR(new_ah->ah)) { pr_warn("Couldn't create new SM AH\n"); kfree(new_ah); return; } spin_lock_irq(&port->ah_lock); if (port->sm_ah) kref_put(&port->sm_ah->ref, free_sm_ah); port->sm_ah = new_ah; spin_unlock_irq(&port->ah_lock); } static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) { if (event->event == IB_EVENT_PORT_ERR || event->event == IB_EVENT_PORT_ACTIVE || event->event == IB_EVENT_LID_CHANGE || event->event == IB_EVENT_PKEY_CHANGE || event->event == IB_EVENT_SM_CHANGE || event->event == IB_EVENT_CLIENT_REREGISTER) { unsigned long flags; struct ib_sa_device *sa_dev = container_of(handler, typeof(*sa_dev), event_handler); struct ib_sa_port *port = &sa_dev->port[event->element.port_num - sa_dev->start_port]; if (!rdma_cap_ib_sa(handler->device, port->port_num)) return; spin_lock_irqsave(&port->ah_lock, flags); if (port->sm_ah) kref_put(&port->sm_ah->ref, free_sm_ah); port->sm_ah = NULL; spin_unlock_irqrestore(&port->ah_lock, flags); queue_work(ib_wq, &sa_dev->port[event->element.port_num - sa_dev->start_port].update_task); } } void ib_sa_register_client(struct ib_sa_client *client) { atomic_set(&client->users, 1); init_completion(&client->comp); } EXPORT_SYMBOL(ib_sa_register_client); void ib_sa_unregister_client(struct ib_sa_client *client) { ib_sa_client_put(client); wait_for_completion(&client->comp); } EXPORT_SYMBOL(ib_sa_unregister_client); /** * ib_sa_cancel_query - try to cancel an SA query * @id:ID of query to cancel * @query:query pointer to cancel * * Try to cancel an SA query. If the id and query don't match up or * the query has already completed, nothing is done. Otherwise the * query is canceled and will complete with a status of -EINTR. */ void ib_sa_cancel_query(int id, struct ib_sa_query *query) { unsigned long flags; struct ib_mad_agent *agent; struct ib_mad_send_buf *mad_buf; spin_lock_irqsave(&idr_lock, flags); if (idr_find(&query_idr, id) != query) { spin_unlock_irqrestore(&idr_lock, flags); return; } agent = query->port->agent; mad_buf = query->mad_buf; spin_unlock_irqrestore(&idr_lock, flags); /* * If the query is still on the netlink request list, schedule * it to be cancelled by the timeout routine. Otherwise, it has been * sent to the MAD layer and has to be cancelled from there. */ if (!ib_nl_cancel_request(query)) ib_cancel_mad(agent, mad_buf); } EXPORT_SYMBOL(ib_sa_cancel_query); static u8 get_src_path_mask(struct ib_device *device, u8 port_num) { struct ib_sa_device *sa_dev; struct ib_sa_port *port; unsigned long flags; u8 src_path_mask; sa_dev = ib_get_client_data(device, &sa_client); if (!sa_dev) return 0x7f; port = &sa_dev->port[port_num - sa_dev->start_port]; spin_lock_irqsave(&port->ah_lock, flags); src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; spin_unlock_irqrestore(&port->ah_lock, flags); return src_path_mask; } int ib_init_ah_from_path(struct ib_device *device, u8 port_num, struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) { int ret; u16 gid_index; int use_roce; struct net_device *ndev = NULL; memset(ah_attr, 0, sizeof *ah_attr); ah_attr->dlid = be16_to_cpu(rec->dlid); ah_attr->sl = rec->sl; ah_attr->src_path_bits = be16_to_cpu(rec->slid) & get_src_path_mask(device, port_num); ah_attr->port_num = port_num; ah_attr->static_rate = rec->rate; use_roce = rdma_cap_eth_ah(device, port_num); if (use_roce) { struct net_device *idev; struct net_device *resolved_dev; struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex, .net = rec->net ? rec->net : &init_net}; union { struct sockaddr _sockaddr; struct sockaddr_in _sockaddr_in; struct sockaddr_in6 _sockaddr_in6; } sgid_addr, dgid_addr; if (!device->get_netdev) return -EOPNOTSUPP; rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid); rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid); /* validate the route */ ret = rdma_resolve_ip_route(&sgid_addr._sockaddr, &dgid_addr._sockaddr, &dev_addr); if (ret) return ret; if ((dev_addr.network == RDMA_NETWORK_IPV4 || dev_addr.network == RDMA_NETWORK_IPV6) && rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP) return -EINVAL; idev = device->get_netdev(device, port_num); if (!idev) return -ENODEV; resolved_dev = dev_get_by_index(dev_addr.net, dev_addr.bound_dev_if); if (resolved_dev->flags & IFF_LOOPBACK) { dev_put(resolved_dev); resolved_dev = idev; dev_hold(resolved_dev); } ndev = ib_get_ndev_from_path(rec); rcu_read_lock(); if ((ndev && ndev != resolved_dev) || (resolved_dev != idev && !rdma_is_upper_dev_rcu(idev, resolved_dev))) ret = -EHOSTUNREACH; rcu_read_unlock(); dev_put(idev); dev_put(resolved_dev); if (ret) { if (ndev) dev_put(ndev); return ret; } } if (rec->hop_limit > 1 || use_roce) { ah_attr->ah_flags = IB_AH_GRH; ah_attr->grh.dgid = rec->dgid; ret = ib_find_cached_gid_by_port(device, &rec->sgid, rec->gid_type, port_num, ndev, &gid_index); if (ret) { if (ndev) dev_put(ndev); return ret; } ah_attr->grh.sgid_index = gid_index; ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); ah_attr->grh.hop_limit = rec->hop_limit; ah_attr->grh.traffic_class = rec->traffic_class; if (ndev) dev_put(ndev); } if (use_roce) memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN); return 0; } EXPORT_SYMBOL(ib_init_ah_from_path); static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) { unsigned long flags; spin_lock_irqsave(&query->port->ah_lock, flags); if (!query->port->sm_ah) { spin_unlock_irqrestore(&query->port->ah_lock, flags); return -EAGAIN; } kref_get(&query->port->sm_ah->ref); query->sm_ah = query->port->sm_ah; spin_unlock_irqrestore(&query->port->ah_lock, flags); query->mad_buf = ib_create_send_mad(query->port->agent, 1, query->sm_ah->pkey_index, 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, gfp_mask, IB_MGMT_BASE_VERSION); if (IS_ERR(query->mad_buf)) { kref_put(&query->sm_ah->ref, free_sm_ah); return -ENOMEM; } query->mad_buf->ah = query->sm_ah->ah; return 0; } static void free_mad(struct ib_sa_query *query) { ib_free_send_mad(query->mad_buf); kref_put(&query->sm_ah->ref, free_sm_ah); } static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) { unsigned long flags; memset(mad, 0, sizeof *mad); mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; spin_lock_irqsave(&tid_lock, flags); mad->mad_hdr.tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); spin_unlock_irqrestore(&tid_lock, flags); } static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask) { bool preload = gfpflags_allow_blocking(gfp_mask); unsigned long flags; int ret, id; if (preload) idr_preload(gfp_mask); spin_lock_irqsave(&idr_lock, flags); id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT); spin_unlock_irqrestore(&idr_lock, flags); if (preload) idr_preload_end(); if (id < 0) return id; query->mad_buf->timeout_ms = timeout_ms; query->mad_buf->context[0] = query; query->id = id; if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) { if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) { if (!ib_nl_make_request(query, gfp_mask)) return id; } ib_sa_disable_local_svc(query); } ret = ib_post_send_mad(query->mad_buf, NULL); if (ret) { spin_lock_irqsave(&idr_lock, flags); idr_remove(&query_idr, id); spin_unlock_irqrestore(&idr_lock, flags); } /* * It's not safe to dereference query any more, because the * send may already have completed and freed the query in * another context. */ return ret ? ret : id; } void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec) { ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); } EXPORT_SYMBOL(ib_sa_unpack_path); void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute) { ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); } EXPORT_SYMBOL(ib_sa_pack_path); static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_path_query *query = container_of(sa_query, struct ib_sa_path_query, sa_query); if (mad) { struct ib_sa_path_rec rec; ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), mad->data, &rec); rec.net = NULL; rec.ifindex = 0; rec.gid_type = IB_GID_TYPE_IB; eth_zero_addr(rec.dmac); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) { kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); } /** * ib_sa_path_rec_get - Start a Path get query * @client:SA client * @device:device to send query on * @port_num: port number to send query on * @rec:Path Record to send in query * @comp_mask:component mask to send in query * @timeout_ms:time to wait for response * @gfp_mask:GFP mask to use for internal allocations * @callback:function called when query completes, times out or is * canceled * @context:opaque user context passed to callback * @sa_query:query context, used to cancel query * * Send a Path Record Get query to the SA to look up a path. The * callback function will be called when the query completes (or * fails); status is 0 for a successful response, -EINTR if the query * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error * occurred sending the query. The resp parameter of the callback is * only valid if status is 0. * * If the return value of ib_sa_path_rec_get() is negative, it is an * error code. Otherwise it is a query ID that can be used to cancel * the query. */ int ib_sa_path_rec_get(struct ib_sa_client *client, struct ib_device *device, u8 port_num, struct ib_sa_path_rec *rec, ib_sa_comp_mask comp_mask, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_path_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_path_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; struct ib_sa_mad *mad; int ret; if (!sa_dev) return -ENODEV; port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; query = kzalloc(sizeof(*query), gfp_mask); if (!query) return -ENOMEM; query->sa_query.port = port; ret = alloc_mad(&query->sa_query, gfp_mask); if (ret) goto err1; ib_sa_client_get(client); query->sa_query.client = client; query->callback = callback; query->context = context; mad = query->sa_query.mad_buf->mad; init_mad(mad, agent); query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; query->sa_query.release = ib_sa_path_rec_release; mad->mad_hdr.method = IB_MGMT_METHOD_GET; mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); mad->sa_hdr.comp_mask = comp_mask; ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); *sa_query = &query->sa_query; query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; query->sa_query.mad_buf->context[1] = rec; ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); if (ret < 0) goto err2; return ret; err2: *sa_query = NULL; ib_sa_client_put(query->sa_query.client); free_mad(&query->sa_query); err1: kfree(query); return ret; } EXPORT_SYMBOL(ib_sa_path_rec_get); static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_service_query *query = container_of(sa_query, struct ib_sa_service_query, sa_query); if (mad) { struct ib_sa_service_rec rec; ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), mad->data, &rec); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) { kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); } /** * ib_sa_service_rec_query - Start Service Record operation * @client:SA client * @device:device to send request on * @port_num: port number to send request on * @method:SA method - should be get, set, or delete * @rec:Service Record to send in request * @comp_mask:component mask to send in request * @timeout_ms:time to wait for response * @gfp_mask:GFP mask to use for internal allocations * @callback:function called when request completes, times out or is * canceled * @context:opaque user context passed to callback * @sa_query:request context, used to cancel request * * Send a Service Record set/get/delete to the SA to register, * unregister or query a service record. * The callback function will be called when the request completes (or * fails); status is 0 for a successful response, -EINTR if the query * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error * occurred sending the query. The resp parameter of the callback is * only valid if status is 0. * * If the return value of ib_sa_service_rec_query() is negative, it is an * error code. Otherwise it is a request ID that can be used to cancel * the query. */ int ib_sa_service_rec_query(struct ib_sa_client *client, struct ib_device *device, u8 port_num, u8 method, struct ib_sa_service_rec *rec, ib_sa_comp_mask comp_mask, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_service_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_service_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; struct ib_sa_mad *mad; int ret; if (!sa_dev) return -ENODEV; port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; if (method != IB_MGMT_METHOD_GET && method != IB_MGMT_METHOD_SET && method != IB_SA_METHOD_DELETE) return -EINVAL; query = kzalloc(sizeof(*query), gfp_mask); if (!query) return -ENOMEM; query->sa_query.port = port; ret = alloc_mad(&query->sa_query, gfp_mask); if (ret) goto err1; ib_sa_client_get(client); query->sa_query.client = client; query->callback = callback; query->context = context; mad = query->sa_query.mad_buf->mad; init_mad(mad, agent); query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; query->sa_query.release = ib_sa_service_rec_release; mad->mad_hdr.method = method; mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); mad->sa_hdr.comp_mask = comp_mask; ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), rec, mad->data); *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); if (ret < 0) goto err2; return ret; err2: *sa_query = NULL; ib_sa_client_put(query->sa_query.client); free_mad(&query->sa_query); err1: kfree(query); return ret; } EXPORT_SYMBOL(ib_sa_service_rec_query); static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_mcmember_query *query = container_of(sa_query, struct ib_sa_mcmember_query, sa_query); if (mad) { struct ib_sa_mcmember_rec rec; ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), mad->data, &rec); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) { kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); } int ib_sa_mcmember_rec_query(struct ib_sa_client *client, struct ib_device *device, u8 port_num, u8 method, struct ib_sa_mcmember_rec *rec, ib_sa_comp_mask comp_mask, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_mcmember_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_mcmember_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; struct ib_sa_mad *mad; int ret; if (!sa_dev) return -ENODEV; port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; query = kzalloc(sizeof(*query), gfp_mask); if (!query) return -ENOMEM; query->sa_query.port = port; ret = alloc_mad(&query->sa_query, gfp_mask); if (ret) goto err1; ib_sa_client_get(client); query->sa_query.client = client; query->callback = callback; query->context = context; mad = query->sa_query.mad_buf->mad; init_mad(mad, agent); query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; query->sa_query.release = ib_sa_mcmember_rec_release; mad->mad_hdr.method = method; mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); mad->sa_hdr.comp_mask = comp_mask; ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), rec, mad->data); *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); if (ret < 0) goto err2; return ret; err2: *sa_query = NULL; ib_sa_client_put(query->sa_query.client); free_mad(&query->sa_query); err1: kfree(query); return ret; } /* Support GuidInfoRecord */ static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_guidinfo_query *query = container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); if (mad) { struct ib_sa_guidinfo_rec rec; ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), mad->data, &rec); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) { kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); } int ib_sa_guid_info_rec_query(struct ib_sa_client *client, struct ib_device *device, u8 port_num, struct ib_sa_guidinfo_rec *rec, ib_sa_comp_mask comp_mask, u8 method, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_guidinfo_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_guidinfo_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; struct ib_sa_mad *mad; int ret; if (!sa_dev) return -ENODEV; if (method != IB_MGMT_METHOD_GET && method != IB_MGMT_METHOD_SET && method != IB_SA_METHOD_DELETE) { return -EINVAL; } port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; query = kzalloc(sizeof(*query), gfp_mask); if (!query) return -ENOMEM; query->sa_query.port = port; ret = alloc_mad(&query->sa_query, gfp_mask); if (ret) goto err1; ib_sa_client_get(client); query->sa_query.client = client; query->callback = callback; query->context = context; mad = query->sa_query.mad_buf->mad; init_mad(mad, agent); query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; query->sa_query.release = ib_sa_guidinfo_rec_release; mad->mad_hdr.method = method; mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); mad->sa_hdr.comp_mask = comp_mask; ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, mad->data); *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); if (ret < 0) goto err2; return ret; err2: *sa_query = NULL; ib_sa_client_put(query->sa_query.client); free_mad(&query->sa_query); err1: kfree(query); return ret; } EXPORT_SYMBOL(ib_sa_guid_info_rec_query); static void send_handler(struct ib_mad_agent *agent, struct ib_mad_send_wc *mad_send_wc) { struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; unsigned long flags; if (query->callback) switch (mad_send_wc->status) { case IB_WC_SUCCESS: /* No callback -- already got recv */ break; case IB_WC_RESP_TIMEOUT_ERR: query->callback(query, -ETIMEDOUT, NULL); break; case IB_WC_WR_FLUSH_ERR: query->callback(query, -EINTR, NULL); break; default: query->callback(query, -EIO, NULL); break; } spin_lock_irqsave(&idr_lock, flags); idr_remove(&query_idr, query->id); spin_unlock_irqrestore(&idr_lock, flags); free_mad(query); ib_sa_client_put(query->client); query->release(query); } static void recv_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, struct ib_mad_recv_wc *mad_recv_wc) { struct ib_sa_query *query; if (!send_buf) return; query = send_buf->context[0]; if (query->callback) { if (mad_recv_wc->wc->status == IB_WC_SUCCESS) query->callback(query, mad_recv_wc->recv_buf.mad->mad_hdr.status ? -EINVAL : 0, (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); else query->callback(query, -EIO, NULL); } ib_free_recv_mad(mad_recv_wc); } static void ib_sa_add_one(struct ib_device *device) { struct ib_sa_device *sa_dev; int s, e, i; int count = 0; s = rdma_start_port(device); e = rdma_end_port(device); sa_dev = kzalloc(sizeof *sa_dev + (e - s + 1) * sizeof (struct ib_sa_port), GFP_KERNEL); if (!sa_dev) return; sa_dev->start_port = s; sa_dev->end_port = e; for (i = 0; i <= e - s; ++i) { spin_lock_init(&sa_dev->port[i].ah_lock); if (!rdma_cap_ib_sa(device, i + 1)) continue; sa_dev->port[i].sm_ah = NULL; sa_dev->port[i].port_num = i + s; sa_dev->port[i].agent = ib_register_mad_agent(device, i + s, IB_QPT_GSI, NULL, 0, send_handler, recv_handler, sa_dev, 0); if (IS_ERR(sa_dev->port[i].agent)) goto err; INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); count++; } if (!count) goto free; ib_set_client_data(device, &sa_client, sa_dev); /* * We register our event handler after everything is set up, * and then update our cached info after the event handler is * registered to avoid any problems if a port changes state * during our initialization. */ INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); if (ib_register_event_handler(&sa_dev->event_handler)) goto err; for (i = 0; i <= e - s; ++i) { if (rdma_cap_ib_sa(device, i + 1)) update_sm_ah(&sa_dev->port[i].update_task); } return; err: while (--i >= 0) { if (rdma_cap_ib_sa(device, i + 1)) ib_unregister_mad_agent(sa_dev->port[i].agent); } free: kfree(sa_dev); return; } static void ib_sa_remove_one(struct ib_device *device, void *client_data) { struct ib_sa_device *sa_dev = client_data; int i; if (!sa_dev) return; ib_unregister_event_handler(&sa_dev->event_handler); flush_workqueue(ib_wq); for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { if (rdma_cap_ib_sa(device, i + 1)) { ib_unregister_mad_agent(sa_dev->port[i].agent); if (sa_dev->port[i].sm_ah) kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); } } kfree(sa_dev); } static int __init ib_sa_init(void) { int ret; get_random_bytes(&tid, sizeof tid); atomic_set(&ib_nl_sa_request_seq, 0); ret = ib_register_client(&sa_client); if (ret) { pr_err("Couldn't register ib_sa client\n"); goto err1; } ret = mcast_init(); if (ret) { pr_err("Couldn't initialize multicast handling\n"); goto err2; } ib_nl_wq = create_singlethread_workqueue("ib_nl_sa_wq"); if (!ib_nl_wq) { ret = -ENOMEM; goto err3; } if (ibnl_add_client(RDMA_NL_LS, RDMA_NL_LS_NUM_OPS, ib_sa_cb_table)) { pr_err("Failed to add netlink callback\n"); ret = -EINVAL; goto err4; } INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout); return 0; err4: destroy_workqueue(ib_nl_wq); err3: mcast_cleanup(); err2: ib_unregister_client(&sa_client); err1: return ret; } static void __exit ib_sa_cleanup(void) { ibnl_remove_client(RDMA_NL_LS); cancel_delayed_work(&ib_nl_timed_work); flush_workqueue(ib_nl_wq); destroy_workqueue(ib_nl_wq); mcast_cleanup(); ib_unregister_client(&sa_client); idr_destroy(&query_idr); } module_init(ib_sa_init); module_exit(ib_sa_cleanup);