![Bhaktipriya Shridhar](/assets/img/avatar_default.png)
alloc_ordered_workqueue() with WQ_MEM_RECLAIM set, replaces deprecated create_singlethread_workqueue(). This is the identity conversion. The workqueue "ib_nl" queues work item &ib_nl_timed_work. It has been identity converted. WQ_MEM_RECLAIM has been set to ensure forward progress under memory pressure. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2045 lines
53 KiB
C
2045 lines
53 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
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* Copyright (c) 2006 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/random.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <linux/kref.h>
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#include <linux/idr.h>
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#include <linux/workqueue.h>
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#include <uapi/linux/if_ether.h>
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#include <rdma/ib_pack.h>
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#include <rdma/ib_cache.h>
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#include <rdma/rdma_netlink.h>
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#include <net/netlink.h>
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#include <uapi/rdma/ib_user_sa.h>
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#include <rdma/ib_marshall.h>
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#include <rdma/ib_addr.h>
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#include "sa.h"
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#include "core_priv.h"
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#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
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#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
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#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
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static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
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struct ib_sa_sm_ah {
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struct ib_ah *ah;
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struct kref ref;
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u16 pkey_index;
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u8 src_path_mask;
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};
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struct ib_sa_classport_cache {
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bool valid;
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struct ib_class_port_info data;
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};
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struct ib_sa_port {
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struct ib_mad_agent *agent;
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struct ib_sa_sm_ah *sm_ah;
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struct work_struct update_task;
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struct ib_sa_classport_cache classport_info;
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spinlock_t classport_lock; /* protects class port info set */
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spinlock_t ah_lock;
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u8 port_num;
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};
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struct ib_sa_device {
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int start_port, end_port;
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struct ib_event_handler event_handler;
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struct ib_sa_port port[0];
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};
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struct ib_sa_query {
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void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
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void (*release)(struct ib_sa_query *);
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struct ib_sa_client *client;
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struct ib_sa_port *port;
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struct ib_mad_send_buf *mad_buf;
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struct ib_sa_sm_ah *sm_ah;
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int id;
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u32 flags;
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struct list_head list; /* Local svc request list */
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u32 seq; /* Local svc request sequence number */
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unsigned long timeout; /* Local svc timeout */
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u8 path_use; /* How will the pathrecord be used */
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};
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#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
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#define IB_SA_CANCEL 0x00000002
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struct ib_sa_service_query {
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void (*callback)(int, struct ib_sa_service_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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struct ib_sa_path_query {
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void (*callback)(int, struct ib_sa_path_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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struct ib_sa_guidinfo_query {
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void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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struct ib_sa_classport_info_query {
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void (*callback)(int, struct ib_class_port_info *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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struct ib_sa_mcmember_query {
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void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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static LIST_HEAD(ib_nl_request_list);
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static DEFINE_SPINLOCK(ib_nl_request_lock);
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static atomic_t ib_nl_sa_request_seq;
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static struct workqueue_struct *ib_nl_wq;
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static struct delayed_work ib_nl_timed_work;
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static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
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[LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
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.len = sizeof(struct ib_path_rec_data)},
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[LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
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[LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
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[LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
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.len = sizeof(struct rdma_nla_ls_gid)},
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[LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
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.len = sizeof(struct rdma_nla_ls_gid)},
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[LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
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[LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
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[LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
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};
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static void ib_sa_add_one(struct ib_device *device);
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static void ib_sa_remove_one(struct ib_device *device, void *client_data);
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static struct ib_client sa_client = {
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.name = "sa",
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.add = ib_sa_add_one,
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.remove = ib_sa_remove_one
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};
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static DEFINE_SPINLOCK(idr_lock);
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static DEFINE_IDR(query_idr);
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static DEFINE_SPINLOCK(tid_lock);
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static u32 tid;
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#define PATH_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
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.struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
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.field_name = "sa_path_rec:" #field
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static const struct ib_field path_rec_table[] = {
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{ PATH_REC_FIELD(service_id),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 64 },
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{ PATH_REC_FIELD(dgid),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 128 },
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{ PATH_REC_FIELD(sgid),
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.offset_words = 6,
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.offset_bits = 0,
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.size_bits = 128 },
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{ PATH_REC_FIELD(dlid),
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.offset_words = 10,
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.offset_bits = 0,
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.size_bits = 16 },
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{ PATH_REC_FIELD(slid),
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.offset_words = 10,
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.offset_bits = 16,
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.size_bits = 16 },
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{ PATH_REC_FIELD(raw_traffic),
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.offset_words = 11,
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.offset_bits = 0,
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.size_bits = 1 },
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{ RESERVED,
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.offset_words = 11,
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.offset_bits = 1,
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.size_bits = 3 },
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{ PATH_REC_FIELD(flow_label),
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.offset_words = 11,
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.offset_bits = 4,
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.size_bits = 20 },
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{ PATH_REC_FIELD(hop_limit),
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.offset_words = 11,
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.offset_bits = 24,
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.size_bits = 8 },
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{ PATH_REC_FIELD(traffic_class),
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.offset_words = 12,
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.offset_bits = 0,
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.size_bits = 8 },
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{ PATH_REC_FIELD(reversible),
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.offset_words = 12,
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.offset_bits = 8,
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.size_bits = 1 },
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{ PATH_REC_FIELD(numb_path),
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.offset_words = 12,
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.offset_bits = 9,
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.size_bits = 7 },
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{ PATH_REC_FIELD(pkey),
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.offset_words = 12,
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.offset_bits = 16,
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.size_bits = 16 },
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{ PATH_REC_FIELD(qos_class),
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.offset_words = 13,
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.offset_bits = 0,
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.size_bits = 12 },
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{ PATH_REC_FIELD(sl),
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.offset_words = 13,
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.offset_bits = 12,
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.size_bits = 4 },
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{ PATH_REC_FIELD(mtu_selector),
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.offset_words = 13,
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.offset_bits = 16,
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.size_bits = 2 },
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{ PATH_REC_FIELD(mtu),
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.offset_words = 13,
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.offset_bits = 18,
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.size_bits = 6 },
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{ PATH_REC_FIELD(rate_selector),
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.offset_words = 13,
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.offset_bits = 24,
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.size_bits = 2 },
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{ PATH_REC_FIELD(rate),
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.offset_words = 13,
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.offset_bits = 26,
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.size_bits = 6 },
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{ PATH_REC_FIELD(packet_life_time_selector),
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.offset_words = 14,
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.offset_bits = 0,
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.size_bits = 2 },
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{ PATH_REC_FIELD(packet_life_time),
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.offset_words = 14,
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.offset_bits = 2,
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.size_bits = 6 },
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{ PATH_REC_FIELD(preference),
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.offset_words = 14,
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.offset_bits = 8,
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.size_bits = 8 },
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{ RESERVED,
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.offset_words = 14,
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.offset_bits = 16,
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.size_bits = 48 },
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};
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#define MCMEMBER_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
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.struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
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.field_name = "sa_mcmember_rec:" #field
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static const struct ib_field mcmember_rec_table[] = {
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{ MCMEMBER_REC_FIELD(mgid),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 128 },
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{ MCMEMBER_REC_FIELD(port_gid),
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.offset_words = 4,
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.offset_bits = 0,
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.size_bits = 128 },
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{ MCMEMBER_REC_FIELD(qkey),
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.offset_words = 8,
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.offset_bits = 0,
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.size_bits = 32 },
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{ MCMEMBER_REC_FIELD(mlid),
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.offset_words = 9,
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.offset_bits = 0,
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.size_bits = 16 },
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{ MCMEMBER_REC_FIELD(mtu_selector),
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.offset_words = 9,
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.offset_bits = 16,
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.size_bits = 2 },
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{ MCMEMBER_REC_FIELD(mtu),
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.offset_words = 9,
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.offset_bits = 18,
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.size_bits = 6 },
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{ MCMEMBER_REC_FIELD(traffic_class),
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.offset_words = 9,
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.offset_bits = 24,
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.size_bits = 8 },
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{ MCMEMBER_REC_FIELD(pkey),
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.offset_words = 10,
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.offset_bits = 0,
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.size_bits = 16 },
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{ MCMEMBER_REC_FIELD(rate_selector),
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.offset_words = 10,
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.offset_bits = 16,
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.size_bits = 2 },
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{ MCMEMBER_REC_FIELD(rate),
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.offset_words = 10,
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.offset_bits = 18,
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.size_bits = 6 },
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{ MCMEMBER_REC_FIELD(packet_life_time_selector),
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.offset_words = 10,
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.offset_bits = 24,
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.size_bits = 2 },
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{ MCMEMBER_REC_FIELD(packet_life_time),
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.offset_words = 10,
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.offset_bits = 26,
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.size_bits = 6 },
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{ MCMEMBER_REC_FIELD(sl),
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.offset_words = 11,
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.offset_bits = 0,
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.size_bits = 4 },
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{ MCMEMBER_REC_FIELD(flow_label),
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.offset_words = 11,
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.offset_bits = 4,
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.size_bits = 20 },
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{ MCMEMBER_REC_FIELD(hop_limit),
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.offset_words = 11,
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.offset_bits = 24,
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.size_bits = 8 },
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{ MCMEMBER_REC_FIELD(scope),
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.offset_words = 12,
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.offset_bits = 0,
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.size_bits = 4 },
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{ MCMEMBER_REC_FIELD(join_state),
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.offset_words = 12,
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.offset_bits = 4,
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.size_bits = 4 },
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{ MCMEMBER_REC_FIELD(proxy_join),
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.offset_words = 12,
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.offset_bits = 8,
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.size_bits = 1 },
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{ RESERVED,
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.offset_words = 12,
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.offset_bits = 9,
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.size_bits = 23 },
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};
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#define SERVICE_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
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.struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
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.field_name = "sa_service_rec:" #field
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static const struct ib_field service_rec_table[] = {
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{ SERVICE_REC_FIELD(id),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 64 },
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{ SERVICE_REC_FIELD(gid),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 128 },
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{ SERVICE_REC_FIELD(pkey),
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.offset_words = 6,
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.offset_bits = 0,
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.size_bits = 16 },
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{ SERVICE_REC_FIELD(lease),
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.offset_words = 7,
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.offset_bits = 0,
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.size_bits = 32 },
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{ SERVICE_REC_FIELD(key),
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.offset_words = 8,
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.offset_bits = 0,
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.size_bits = 128 },
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{ SERVICE_REC_FIELD(name),
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.offset_words = 12,
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.offset_bits = 0,
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.size_bits = 64*8 },
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{ SERVICE_REC_FIELD(data8),
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.offset_words = 28,
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.offset_bits = 0,
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.size_bits = 16*8 },
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{ SERVICE_REC_FIELD(data16),
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.offset_words = 32,
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.offset_bits = 0,
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.size_bits = 8*16 },
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{ SERVICE_REC_FIELD(data32),
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.offset_words = 36,
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.offset_bits = 0,
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.size_bits = 4*32 },
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{ SERVICE_REC_FIELD(data64),
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.offset_words = 40,
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.offset_bits = 0,
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.size_bits = 2*64 },
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};
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#define CLASSPORTINFO_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_class_port_info, field), \
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.struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \
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.field_name = "ib_class_port_info:" #field
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static const struct ib_field classport_info_rec_table[] = {
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{ CLASSPORTINFO_REC_FIELD(base_version),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 8 },
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{ CLASSPORTINFO_REC_FIELD(class_version),
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.offset_words = 0,
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.offset_bits = 8,
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.size_bits = 8 },
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{ CLASSPORTINFO_REC_FIELD(capability_mask),
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.offset_words = 0,
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.offset_bits = 16,
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.size_bits = 16 },
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{ CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 32 },
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{ CLASSPORTINFO_REC_FIELD(redirect_gid),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 128 },
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{ CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
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.offset_words = 6,
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.offset_bits = 0,
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.size_bits = 32 },
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{ CLASSPORTINFO_REC_FIELD(redirect_lid),
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.offset_words = 7,
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.offset_bits = 0,
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.size_bits = 16 },
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{ CLASSPORTINFO_REC_FIELD(redirect_pkey),
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.offset_words = 7,
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.offset_bits = 16,
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.size_bits = 16 },
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{ CLASSPORTINFO_REC_FIELD(redirect_qp),
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.offset_words = 8,
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.offset_bits = 0,
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.size_bits = 32 },
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{ CLASSPORTINFO_REC_FIELD(redirect_qkey),
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.offset_words = 9,
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.offset_bits = 0,
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.size_bits = 32 },
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{ CLASSPORTINFO_REC_FIELD(trap_gid),
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.offset_words = 10,
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.offset_bits = 0,
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.size_bits = 128 },
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{ CLASSPORTINFO_REC_FIELD(trap_tcslfl),
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.offset_words = 14,
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.offset_bits = 0,
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.size_bits = 32 },
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{ CLASSPORTINFO_REC_FIELD(trap_lid),
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.offset_words = 15,
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.offset_bits = 0,
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.size_bits = 16 },
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{ CLASSPORTINFO_REC_FIELD(trap_pkey),
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.offset_words = 15,
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.offset_bits = 16,
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.size_bits = 16 },
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{ CLASSPORTINFO_REC_FIELD(trap_hlqp),
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.offset_words = 16,
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.offset_bits = 0,
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.size_bits = 32 },
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{ CLASSPORTINFO_REC_FIELD(trap_qkey),
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.offset_words = 17,
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.offset_bits = 0,
|
|
.size_bits = 32 },
|
|
};
|
|
|
|
#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) {
|
|
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;
|
|
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 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;
|
|
}
|
|
|
|
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 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);
|
|
|
|
if (event->event == IB_EVENT_SM_CHANGE ||
|
|
event->event == IB_EVENT_CLIENT_REREGISTER ||
|
|
event->event == IB_EVENT_LID_CHANGE) {
|
|
spin_lock_irqsave(&port->classport_lock, flags);
|
|
port->classport_info.valid = false;
|
|
spin_unlock_irqrestore(&port->classport_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 > 0 || 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);
|
|
|
|
/* Support get SA ClassPortInfo */
|
|
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);
|
|
|
|
if (mad) {
|
|
struct ib_class_port_info rec;
|
|
|
|
ib_unpack(classport_info_rec_table,
|
|
ARRAY_SIZE(classport_info_rec_table),
|
|
mad->data, &rec);
|
|
|
|
spin_lock_irqsave(&sa_query->port->classport_lock, flags);
|
|
if (!status && !sa_query->port->classport_info.valid) {
|
|
memcpy(&sa_query->port->classport_info.data, &rec,
|
|
sizeof(sa_query->port->classport_info.data));
|
|
|
|
sa_query->port->classport_info.valid = true;
|
|
}
|
|
spin_unlock_irqrestore(&sa_query->port->classport_lock, flags);
|
|
|
|
query->callback(status, &rec, query->context);
|
|
} else {
|
|
query->callback(status, NULL, query->context);
|
|
}
|
|
}
|
|
|
|
static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query)
|
|
{
|
|
kfree(container_of(sa_query, struct ib_sa_classport_info_query,
|
|
sa_query));
|
|
}
|
|
|
|
int ib_sa_classport_info_rec_query(struct ib_sa_client *client,
|
|
struct ib_device *device, u8 port_num,
|
|
int timeout_ms, gfp_t gfp_mask,
|
|
void (*callback)(int status,
|
|
struct ib_class_port_info *resp,
|
|
void *context),
|
|
void *context,
|
|
struct ib_sa_query **sa_query)
|
|
{
|
|
struct ib_sa_classport_info_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;
|
|
struct ib_class_port_info cached_class_port_info;
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
if (!sa_dev)
|
|
return -ENODEV;
|
|
|
|
port = &sa_dev->port[port_num - sa_dev->start_port];
|
|
agent = port->agent;
|
|
|
|
/* Use cached ClassPortInfo attribute if valid instead of sending mad */
|
|
spin_lock_irqsave(&port->classport_lock, flags);
|
|
if (port->classport_info.valid && callback) {
|
|
memcpy(&cached_class_port_info, &port->classport_info.data,
|
|
sizeof(cached_class_port_info));
|
|
spin_unlock_irqrestore(&port->classport_lock, flags);
|
|
callback(0, &cached_class_port_info, context);
|
|
return 0;
|
|
}
|
|
spin_unlock_irqrestore(&port->classport_lock, flags);
|
|
|
|
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_classport_info_rec_callback : NULL;
|
|
|
|
query->sa_query.release = ib_sa_portclass_info_rec_release;
|
|
/* support GET only */
|
|
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 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_classport_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;
|
|
|
|
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))
|
|
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);
|
|
}
|
|
|
|
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);
|
|
idr_destroy(&query_idr);
|
|
}
|