/* * 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 #include "sa.h" #include "core_priv.h" #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 #define IB_SA_CPI_MAX_RETRY_CNT 3 #define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */ 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; }; enum rdma_class_port_info_type { RDMA_CLASS_PORT_INFO_IB, RDMA_CLASS_PORT_INFO_OPA }; struct rdma_class_port_info { enum rdma_class_port_info_type type; union { struct ib_class_port_info ib; struct opa_class_port_info opa; }; }; struct ib_sa_classport_cache { bool valid; int retry_cnt; struct rdma_class_port_info data; }; struct ib_sa_port { struct ib_mad_agent *agent; struct ib_sa_sm_ah *sm_ah; struct work_struct update_task; struct ib_sa_classport_cache classport_info; struct delayed_work ib_cpi_work; spinlock_t classport_lock; /* protects class port info set */ spinlock_t ah_lock; u32 port_num; }; struct ib_sa_device { int start_port, end_port; struct ib_event_handler event_handler; struct ib_sa_port port[]; }; 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 #define IB_SA_QUERY_OPA 0x00000004 struct ib_sa_path_query { void (*callback)(int, struct sa_path_rec *, void *); void *context; struct ib_sa_query sa_query; struct sa_path_rec *conv_pr; }; 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_classport_info_query { void (*callback)(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 int 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_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); static DEFINE_SPINLOCK(tid_lock); static u32 tid; #define PATH_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct sa_path_rec, field), \ .struct_size_bytes = sizeof_field(struct sa_path_rec, 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(ib.dlid), .offset_words = 10, .offset_bits = 0, .size_bits = 16 }, { PATH_REC_FIELD(ib.slid), .offset_words = 10, .offset_bits = 16, .size_bits = 16 }, { PATH_REC_FIELD(ib.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 OPA_PATH_REC_FIELD(field) \ .struct_offset_bytes = \ offsetof(struct sa_path_rec, field), \ .struct_size_bytes = \ sizeof_field(struct sa_path_rec, field), \ .field_name = "sa_path_rec:" #field static const struct ib_field opa_path_rec_table[] = { { OPA_PATH_REC_FIELD(service_id), .offset_words = 0, .offset_bits = 0, .size_bits = 64 }, { OPA_PATH_REC_FIELD(dgid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { OPA_PATH_REC_FIELD(sgid), .offset_words = 6, .offset_bits = 0, .size_bits = 128 }, { OPA_PATH_REC_FIELD(opa.dlid), .offset_words = 10, .offset_bits = 0, .size_bits = 32 }, { OPA_PATH_REC_FIELD(opa.slid), .offset_words = 11, .offset_bits = 0, .size_bits = 32 }, { OPA_PATH_REC_FIELD(opa.raw_traffic), .offset_words = 12, .offset_bits = 0, .size_bits = 1 }, { RESERVED, .offset_words = 12, .offset_bits = 1, .size_bits = 3 }, { OPA_PATH_REC_FIELD(flow_label), .offset_words = 12, .offset_bits = 4, .size_bits = 20 }, { OPA_PATH_REC_FIELD(hop_limit), .offset_words = 12, .offset_bits = 24, .size_bits = 8 }, { OPA_PATH_REC_FIELD(traffic_class), .offset_words = 13, .offset_bits = 0, .size_bits = 8 }, { OPA_PATH_REC_FIELD(reversible), .offset_words = 13, .offset_bits = 8, .size_bits = 1 }, { OPA_PATH_REC_FIELD(numb_path), .offset_words = 13, .offset_bits = 9, .size_bits = 7 }, { OPA_PATH_REC_FIELD(pkey), .offset_words = 13, .offset_bits = 16, .size_bits = 16 }, { OPA_PATH_REC_FIELD(opa.l2_8B), .offset_words = 14, .offset_bits = 0, .size_bits = 1 }, { OPA_PATH_REC_FIELD(opa.l2_10B), .offset_words = 14, .offset_bits = 1, .size_bits = 1 }, { OPA_PATH_REC_FIELD(opa.l2_9B), .offset_words = 14, .offset_bits = 2, .size_bits = 1 }, { OPA_PATH_REC_FIELD(opa.l2_16B), .offset_words = 14, .offset_bits = 3, .size_bits = 1 }, { RESERVED, .offset_words = 14, .offset_bits = 4, .size_bits = 2 }, { OPA_PATH_REC_FIELD(opa.qos_type), .offset_words = 14, .offset_bits = 6, .size_bits = 2 }, { OPA_PATH_REC_FIELD(opa.qos_priority), .offset_words = 14, .offset_bits = 8, .size_bits = 8 }, { RESERVED, .offset_words = 14, .offset_bits = 16, .size_bits = 3 }, { OPA_PATH_REC_FIELD(sl), .offset_words = 14, .offset_bits = 19, .size_bits = 5 }, { RESERVED, .offset_words = 14, .offset_bits = 24, .size_bits = 8 }, { OPA_PATH_REC_FIELD(mtu_selector), .offset_words = 15, .offset_bits = 0, .size_bits = 2 }, { OPA_PATH_REC_FIELD(mtu), .offset_words = 15, .offset_bits = 2, .size_bits = 6 }, { OPA_PATH_REC_FIELD(rate_selector), .offset_words = 15, .offset_bits = 8, .size_bits = 2 }, { OPA_PATH_REC_FIELD(rate), .offset_words = 15, .offset_bits = 10, .size_bits = 6 }, { OPA_PATH_REC_FIELD(packet_life_time_selector), .offset_words = 15, .offset_bits = 16, .size_bits = 2 }, { OPA_PATH_REC_FIELD(packet_life_time), .offset_words = 15, .offset_bits = 18, .size_bits = 6 }, { OPA_PATH_REC_FIELD(preference), .offset_words = 15, .offset_bits = 24, .size_bits = 8 }, }; #define MCMEMBER_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ .struct_size_bytes = sizeof_field(struct ib_sa_mcmember_rec, 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 CLASSPORTINFO_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \ .struct_size_bytes = sizeof_field(struct ib_class_port_info, field), \ .field_name = "ib_class_port_info:" #field static const struct ib_field ib_classport_info_rec_table[] = { { CLASSPORTINFO_REC_FIELD(base_version), .offset_words = 0, .offset_bits = 0, .size_bits = 8 }, { CLASSPORTINFO_REC_FIELD(class_version), .offset_words = 0, .offset_bits = 8, .size_bits = 8 }, { CLASSPORTINFO_REC_FIELD(capability_mask), .offset_words = 0, .offset_bits = 16, .size_bits = 16 }, { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), .offset_words = 1, .offset_bits = 0, .size_bits = 32 }, { CLASSPORTINFO_REC_FIELD(redirect_gid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { CLASSPORTINFO_REC_FIELD(redirect_tcslfl), .offset_words = 6, .offset_bits = 0, .size_bits = 32 }, { CLASSPORTINFO_REC_FIELD(redirect_lid), .offset_words = 7, .offset_bits = 0, .size_bits = 16 }, { CLASSPORTINFO_REC_FIELD(redirect_pkey), .offset_words = 7, .offset_bits = 16, .size_bits = 16 }, { CLASSPORTINFO_REC_FIELD(redirect_qp), .offset_words = 8, .offset_bits = 0, .size_bits = 32 }, { CLASSPORTINFO_REC_FIELD(redirect_qkey), .offset_words = 9, .offset_bits = 0, .size_bits = 32 }, { CLASSPORTINFO_REC_FIELD(trap_gid), .offset_words = 10, .offset_bits = 0, .size_bits = 128 }, { CLASSPORTINFO_REC_FIELD(trap_tcslfl), .offset_words = 14, .offset_bits = 0, .size_bits = 32 }, { CLASSPORTINFO_REC_FIELD(trap_lid), .offset_words = 15, .offset_bits = 0, .size_bits = 16 }, { CLASSPORTINFO_REC_FIELD(trap_pkey), .offset_words = 15, .offset_bits = 16, .size_bits = 16 }, { CLASSPORTINFO_REC_FIELD(trap_hlqp), .offset_words = 16, .offset_bits = 0, .size_bits = 32 }, { CLASSPORTINFO_REC_FIELD(trap_qkey), .offset_words = 17, .offset_bits = 0, .size_bits = 32 }, }; #define OPA_CLASSPORTINFO_REC_FIELD(field) \ .struct_offset_bytes =\ offsetof(struct opa_class_port_info, field), \ .struct_size_bytes = \ sizeof_field(struct opa_class_port_info, field), \ .field_name = "opa_class_port_info:" #field static const struct ib_field opa_classport_info_rec_table[] = { { OPA_CLASSPORTINFO_REC_FIELD(base_version), .offset_words = 0, .offset_bits = 0, .size_bits = 8 }, { OPA_CLASSPORTINFO_REC_FIELD(class_version), .offset_words = 0, .offset_bits = 8, .size_bits = 8 }, { OPA_CLASSPORTINFO_REC_FIELD(cap_mask), .offset_words = 0, .offset_bits = 16, .size_bits = 16 }, { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), .offset_words = 1, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl), .offset_words = 6, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid), .offset_words = 7, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp), .offset_words = 8, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey), .offset_words = 9, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_gid), .offset_words = 10, .offset_bits = 0, .size_bits = 128 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl), .offset_words = 14, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_lid), .offset_words = 15, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp), .offset_words = 16, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey), .offset_words = 17, .offset_bits = 0, .size_bits = 32 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey), .offset_words = 18, .offset_bits = 0, .size_bits = 16 }, { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey), .offset_words = 18, .offset_bits = 16, .size_bits = 16 }, { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd), .offset_words = 19, .offset_bits = 0, .size_bits = 8 }, { RESERVED, .offset_words = 19, .offset_bits = 8, .size_bits = 24 }, }; #define GUIDINFO_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ .struct_size_bytes = sizeof_field(struct ib_sa_guidinfo_rec, 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 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 = skb_put(skb, NLMSG_ALIGN(sizeof(*header))); strscpy_pad(header->device_name, dev_name(&query->port->agent->device->dev), 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_make_request(struct ib_sa_query *query, gfp_t gfp_mask) { struct sk_buff *skb = NULL; struct nlmsghdr *nlh; void *data; struct ib_sa_mad *mad; int len; unsigned long flags; unsigned long delay; gfp_t gfp_flag; int ret; INIT_LIST_HEAD(&query->list); query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq); 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) { nlmsg_free(skb); return -EMSGSIZE; } /* Add attributes */ ib_nl_set_path_rec_attrs(skb, query); /* Repair the nlmsg header length */ nlmsg_end(skb, nlh); gfp_flag = ((gfp_mask & GFP_ATOMIC) == GFP_ATOMIC) ? GFP_ATOMIC : GFP_NOWAIT; spin_lock_irqsave(&ib_nl_request_lock, flags); ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag); if (ret) goto out; /* Put the request on the list.*/ 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); out: spin_unlock_irqrestore(&ib_nl_request_lock, flags); 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); } int ib_nl_handle_set_timeout(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { 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)) return -EPERM; ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), nlmsg_len(nlh), ib_nl_policy, NULL); 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 0; } 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_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), nlmsg_len(nlh), ib_nl_policy, NULL); if (ret) return 0; return 1; } int ib_nl_handle_resolve_resp(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { 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)) 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 0; } static void free_sm_ah(struct kref *kref) { struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); rdma_destroy_ah(sm_ah->ah, 0); kfree(sm_ah); } 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_send_buf *mad_buf; xa_lock_irqsave(&queries, flags); if (xa_load(&queries, id) != query) { xa_unlock_irqrestore(&queries, flags); return; } mad_buf = query->mad_buf; xa_unlock_irqrestore(&queries, 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(mad_buf); } EXPORT_SYMBOL(ib_sa_cancel_query); static u8 get_src_path_mask(struct ib_device *device, u32 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; } static int init_ah_attr_grh_fields(struct ib_device *device, u32 port_num, struct sa_path_rec *rec, struct rdma_ah_attr *ah_attr, const struct ib_gid_attr *gid_attr) { enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec); if (!gid_attr) { gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type, port_num, NULL); if (IS_ERR(gid_attr)) return PTR_ERR(gid_attr); } else rdma_hold_gid_attr(gid_attr); rdma_move_grh_sgid_attr(ah_attr, &rec->dgid, be32_to_cpu(rec->flow_label), rec->hop_limit, rec->traffic_class, gid_attr); return 0; } /** * ib_init_ah_attr_from_path - Initialize address handle attributes based on * an SA path record. * @device: Device associated ah attributes initialization. * @port_num: Port on the specified device. * @rec: path record entry to use for ah attributes initialization. * @ah_attr: address handle attributes to initialization from path record. * @gid_attr: SGID attribute to consider during initialization. * * When ib_init_ah_attr_from_path() returns success, * (a) for IB link layer it optionally contains a reference to SGID attribute * when GRH is present for IB link layer. * (b) for RoCE link layer it contains a reference to SGID attribute. * User must invoke rdma_destroy_ah_attr() to release reference to SGID * attributes which are initialized using ib_init_ah_attr_from_path(). */ int ib_init_ah_attr_from_path(struct ib_device *device, u32 port_num, struct sa_path_rec *rec, struct rdma_ah_attr *ah_attr, const struct ib_gid_attr *gid_attr) { int ret = 0; memset(ah_attr, 0, sizeof(*ah_attr)); ah_attr->type = rdma_ah_find_type(device, port_num); rdma_ah_set_sl(ah_attr, rec->sl); rdma_ah_set_port_num(ah_attr, port_num); rdma_ah_set_static_rate(ah_attr, rec->rate); if (sa_path_is_roce(rec)) { ret = roce_resolve_route_from_path(rec, gid_attr); if (ret) return ret; memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN); } else { rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec))); if (sa_path_is_opa(rec) && rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)) rdma_ah_set_make_grd(ah_attr, true); rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) & get_src_path_mask(device, port_num)); } if (rec->hop_limit > 0 || sa_path_is_roce(rec)) ret = init_ah_attr_grh_fields(device, port_num, rec, ah_attr, gid_attr); return ret; } EXPORT_SYMBOL(ib_init_ah_attr_from_path); static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) { struct rdma_ah_attr ah_attr; 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); /* * Always check if sm_ah has valid dlid assigned, * before querying for class port info */ if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) || !rdma_is_valid_unicast_lid(&ah_attr)) { kref_put(&query->sm_ah->ref, free_sm_ah); return -EAGAIN; } 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, ((query->flags & IB_SA_QUERY_OPA) ? OPA_MGMT_BASE_VERSION : 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_query *query, struct ib_mad_agent *agent) { struct ib_sa_mad *mad = query->mad_buf->mad; unsigned long flags; memset(mad, 0, sizeof *mad); if (query->flags & IB_SA_QUERY_OPA) { mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION; mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION; } else { mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; } mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; 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, unsigned long timeout_ms, gfp_t gfp_mask) { unsigned long flags; int ret, id; const int nmbr_sa_query_retries = 10; xa_lock_irqsave(&queries, flags); ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask); xa_unlock_irqrestore(&queries, flags); if (ret < 0) return ret; query->mad_buf->timeout_ms = timeout_ms / nmbr_sa_query_retries; query->mad_buf->retries = nmbr_sa_query_retries; if (!query->mad_buf->timeout_ms) { /* Special case, very small timeout_ms */ query->mad_buf->timeout_ms = 1; query->mad_buf->retries = timeout_ms; } query->mad_buf->context[0] = query; query->id = id; if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) && (!(query->flags & IB_SA_QUERY_OPA))) { if (rdma_nl_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) { xa_lock_irqsave(&queries, flags); __xa_erase(&queries, id); xa_unlock_irqrestore(&queries, 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 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 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 bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client, struct ib_sa_device *sa_dev, u32 port_num) { struct ib_sa_port *port; unsigned long flags; bool ret = false; port = &sa_dev->port[port_num - sa_dev->start_port]; spin_lock_irqsave(&port->classport_lock, flags); if (!port->classport_info.valid) goto ret; if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA) ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) & OPA_CLASS_PORT_INFO_PR_SUPPORT; ret: spin_unlock_irqrestore(&port->classport_lock, flags); return ret; } enum opa_pr_supported { PR_NOT_SUPPORTED, PR_OPA_SUPPORTED, PR_IB_SUPPORTED }; /* * opa_pr_query_possible - Check if current PR query can be an OPA query. * * Retuns PR_NOT_SUPPORTED if a path record query is not * possible, PR_OPA_SUPPORTED if an OPA path record query * is possible and PR_IB_SUPPORTED if an IB path record * query is possible. */ static int opa_pr_query_possible(struct ib_sa_client *client, struct ib_sa_device *sa_dev, struct ib_device *device, u32 port_num) { struct ib_port_attr port_attr; if (ib_query_port(device, port_num, &port_attr)) return PR_NOT_SUPPORTED; if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num)) return PR_OPA_SUPPORTED; if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) return PR_NOT_SUPPORTED; else return PR_IB_SUPPORTED; } 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 sa_path_rec rec; if (sa_query->flags & IB_SA_QUERY_OPA) { ib_unpack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table), mad->data, &rec); rec.rec_type = SA_PATH_REC_TYPE_OPA; query->callback(status, &rec, query->context); } else { ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), mad->data, &rec); rec.rec_type = SA_PATH_REC_TYPE_IB; sa_path_set_dmac_zero(&rec); if (query->conv_pr) { struct sa_path_rec opa; memset(&opa, 0, sizeof(struct sa_path_rec)); sa_convert_path_ib_to_opa(&opa, &rec); query->callback(status, &opa, query->context); } else { 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) { struct ib_sa_path_query *query = container_of(sa_query, struct ib_sa_path_query, sa_query); kfree(query->conv_pr); kfree(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, u32 port_num, struct sa_path_rec *rec, ib_sa_comp_mask comp_mask, unsigned long timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct 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; enum opa_pr_supported status; int ret; if (!sa_dev) return -ENODEV; if ((rec->rec_type != SA_PATH_REC_TYPE_IB) && (rec->rec_type != SA_PATH_REC_TYPE_OPA)) 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; if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { status = opa_pr_query_possible(client, sa_dev, device, port_num); if (status == PR_NOT_SUPPORTED) { ret = -EINVAL; goto err1; } else if (status == PR_OPA_SUPPORTED) { query->sa_query.flags |= IB_SA_QUERY_OPA; } else { query->conv_pr = kmalloc(sizeof(*query->conv_pr), gfp_mask); if (!query->conv_pr) { ret = -ENOMEM; goto err1; } } } ret = alloc_mad(&query->sa_query, gfp_mask); if (ret) goto err2; 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(&query->sa_query, 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; if (query->sa_query.flags & IB_SA_QUERY_OPA) { ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table), rec, mad->data); } else if (query->conv_pr) { sa_convert_path_opa_to_ib(query->conv_pr, rec); ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), query->conv_pr, mad->data); } else { 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] = (query->conv_pr) ? query->conv_pr : rec; ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); if (ret < 0) goto err3; return ret; err3: *sa_query = NULL; ib_sa_client_put(query->sa_query.client); free_mad(&query->sa_query); err2: kfree(query->conv_pr); err1: kfree(query); return ret; } EXPORT_SYMBOL(ib_sa_path_rec_get); 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, u32 port_num, u8 method, struct ib_sa_mcmember_rec *rec, ib_sa_comp_mask comp_mask, unsigned long 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(&query->sa_query, 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, u32 port_num, struct ib_sa_guidinfo_rec *rec, ib_sa_comp_mask comp_mask, u8 method, unsigned long 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(&query->sa_query, 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); struct ib_classport_info_context { struct completion done; struct ib_sa_query *sa_query; }; static void ib_classportinfo_cb(void *context) { struct ib_classport_info_context *cb_ctx = context; complete(&cb_ctx->done); } static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { unsigned long flags; struct ib_sa_classport_info_query *query = container_of(sa_query, struct ib_sa_classport_info_query, sa_query); struct ib_sa_classport_cache *info = &sa_query->port->classport_info; if (mad) { if (sa_query->flags & IB_SA_QUERY_OPA) { struct opa_class_port_info rec; ib_unpack(opa_classport_info_rec_table, ARRAY_SIZE(opa_classport_info_rec_table), mad->data, &rec); spin_lock_irqsave(&sa_query->port->classport_lock, flags); if (!status && !info->valid) { memcpy(&info->data.opa, &rec, sizeof(info->data.opa)); info->valid = true; info->data.type = RDMA_CLASS_PORT_INFO_OPA; } spin_unlock_irqrestore(&sa_query->port->classport_lock, flags); } else { struct ib_class_port_info rec; ib_unpack(ib_classport_info_rec_table, ARRAY_SIZE(ib_classport_info_rec_table), mad->data, &rec); spin_lock_irqsave(&sa_query->port->classport_lock, flags); if (!status && !info->valid) { memcpy(&info->data.ib, &rec, sizeof(info->data.ib)); info->valid = true; info->data.type = RDMA_CLASS_PORT_INFO_IB; } spin_unlock_irqrestore(&sa_query->port->classport_lock, flags); } } query->callback(query->context); } static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query) { kfree(container_of(sa_query, struct ib_sa_classport_info_query, sa_query)); } static int ib_sa_classport_info_rec_query(struct ib_sa_port *port, unsigned long timeout_ms, void (*callback)(void *context), void *context, struct ib_sa_query **sa_query) { struct ib_mad_agent *agent; struct ib_sa_classport_info_query *query; struct ib_sa_mad *mad; gfp_t gfp_mask = GFP_KERNEL; int ret; agent = port->agent; query = kzalloc(sizeof(*query), gfp_mask); if (!query) return -ENOMEM; query->sa_query.port = port; query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device, port->port_num) ? IB_SA_QUERY_OPA : 0; ret = alloc_mad(&query->sa_query, gfp_mask); if (ret) goto err_free; query->callback = callback; query->context = context; mad = query->sa_query.mad_buf->mad; init_mad(&query->sa_query, agent); query->sa_query.callback = ib_sa_classport_info_rec_callback; query->sa_query.release = ib_sa_classport_info_rec_release; mad->mad_hdr.method = IB_MGMT_METHOD_GET; mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); mad->sa_hdr.comp_mask = 0; *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); if (ret < 0) goto err_free_mad; return ret; err_free_mad: *sa_query = NULL; free_mad(&query->sa_query); err_free: kfree(query); return ret; } static void update_ib_cpi(struct work_struct *work) { struct ib_sa_port *port = container_of(work, struct ib_sa_port, ib_cpi_work.work); struct ib_classport_info_context *cb_context; unsigned long flags; int ret; /* If the classport info is valid, nothing * to do here. */ spin_lock_irqsave(&port->classport_lock, flags); if (port->classport_info.valid) { spin_unlock_irqrestore(&port->classport_lock, flags); return; } spin_unlock_irqrestore(&port->classport_lock, flags); cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL); if (!cb_context) goto err_nomem; init_completion(&cb_context->done); ret = ib_sa_classport_info_rec_query(port, 3000, ib_classportinfo_cb, cb_context, &cb_context->sa_query); if (ret < 0) goto free_cb_err; wait_for_completion(&cb_context->done); free_cb_err: kfree(cb_context); spin_lock_irqsave(&port->classport_lock, flags); /* If the classport info is still not valid, the query should have * failed for some reason. Retry issuing the query */ if (!port->classport_info.valid) { port->classport_info.retry_cnt++; if (port->classport_info.retry_cnt <= IB_SA_CPI_MAX_RETRY_CNT) { unsigned long delay = msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT); queue_delayed_work(ib_wq, &port->ib_cpi_work, delay); } } spin_unlock_irqrestore(&port->classport_lock, flags); err_nomem: return; } 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; } xa_lock_irqsave(&queries, flags); __xa_erase(&queries, query->id); xa_unlock_irqrestore(&queries, flags); free_mad(query); if (query->client) 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 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 rdma_ah_attr ah_attr; bool grh_required; 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.type = rdma_ah_find_type(port->agent->device, port->port_num); rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid); rdma_ah_set_sl(&ah_attr, port_attr.sm_sl); rdma_ah_set_port_num(&ah_attr, port->port_num); grh_required = rdma_is_grh_required(port->agent->device, port->port_num); /* * The OPA sm_lid of 0xFFFF needs special handling so that it can be * differentiated from a permissive LID of 0xFFFF. We set the * grh_required flag here so the SA can program the DGID in the * address handle appropriately */ if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA && (grh_required || port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE))) rdma_ah_set_make_grd(&ah_attr, true); if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) { rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH); rdma_ah_set_subnet_prefix(&ah_attr, cpu_to_be64(port_attr.subnet_prefix)); rdma_ah_set_interface_id(&ah_attr, cpu_to_be64(IB_SA_WELL_KNOWN_GUID)); } new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE); 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); u32 port_num = event->element.port_num - sa_dev->start_port; struct ib_sa_port *port = &sa_dev->port[port_num]; 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); if (event->event == IB_EVENT_SM_CHANGE || event->event == IB_EVENT_CLIENT_REREGISTER || event->event == IB_EVENT_LID_CHANGE || event->event == IB_EVENT_PORT_ACTIVE) { unsigned long delay = msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT); spin_lock_irqsave(&port->classport_lock, flags); port->classport_info.valid = false; port->classport_info.retry_cnt = 0; spin_unlock_irqrestore(&port->classport_lock, flags); queue_delayed_work(ib_wq, &port->ib_cpi_work, delay); } queue_work(ib_wq, &sa_dev->port[port_num].update_task); } } static int ib_sa_add_one(struct ib_device *device) { struct ib_sa_device *sa_dev; int s, e, i; int count = 0; int ret; s = rdma_start_port(device); e = rdma_end_port(device); sa_dev = kzalloc(struct_size(sa_dev, port, size_add(size_sub(e, s), 1)), GFP_KERNEL); if (!sa_dev) return -ENOMEM; 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; spin_lock_init(&sa_dev->port[i].classport_lock); sa_dev->port[i].classport_info.valid = false; 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)) { ret = PTR_ERR(sa_dev->port[i].agent); goto err; } INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work, update_ib_cpi); count++; } if (!count) { ret = -EOPNOTSUPP; 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); ib_register_event_handler(&sa_dev->event_handler); 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 0; 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 ret; } static void ib_sa_remove_one(struct ib_device *device, void *client_data) { struct ib_sa_device *sa_dev = client_data; int i; 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)) { cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work); 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); } int 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 = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM); if (!ib_nl_wq) { ret = -ENOMEM; goto err3; } INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout); return 0; err3: mcast_cleanup(); err2: ib_unregister_client(&sa_client); err1: return ret; } void ib_sa_cleanup(void) { cancel_delayed_work(&ib_nl_timed_work); flush_workqueue(ib_nl_wq); destroy_workqueue(ib_nl_wq); mcast_cleanup(); ib_unregister_client(&sa_client); WARN_ON(!xa_empty(&queries)); }