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sa_query.c
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sa_query.c
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/*
* 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 <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/random.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/kref.h>
#include <linux/idr.h>
#include <linux/workqueue.h>
#include <uapi/linux/if_ether.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_cache.h>
#include <rdma/rdma_netlink.h>
#include <net/netlink.h>
#include <uapi/rdma/ib_user_sa.h>
#include <rdma/ib_marshall.h>
#include <rdma/ib_addr.h>
#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;
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
#define IB_SA_QUERY_OPA 0x00000004
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 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 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 sa_path_rec, field), \
.struct_size_bytes = sizeof((struct 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(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((struct sa_path_rec *)0)->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 ((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 CLASSPORTINFO_REC_FIELD(field) \
.struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
.struct_size_bytes = sizeof((struct ib_class_port_info *)0)->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((struct opa_class_port_info *)0)->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((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 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)));
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) {
nlmsg_free(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;