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![David S. Miller](/assets/img/avatar_default.png)
Some ISDN files that got removed in net-next had some changes done in mainline, take the removals. Signed-off-by: David S. Miller <davem@davemloft.net>
599 lines
17 KiB
C
599 lines
17 KiB
C
/*
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* Copyright (c) 2006, 2018 Oracle and/or its affiliates. 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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*/
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#include <linux/kernel.h>
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#include <linux/in.h>
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#include <linux/if.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/if_arp.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <net/addrconf.h>
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#include "rds_single_path.h"
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#include "rds.h"
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#include "ib.h"
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#include "ib_mr.h"
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static unsigned int rds_ib_mr_1m_pool_size = RDS_MR_1M_POOL_SIZE;
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static unsigned int rds_ib_mr_8k_pool_size = RDS_MR_8K_POOL_SIZE;
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unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT;
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static atomic_t rds_ib_unloading;
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module_param(rds_ib_mr_1m_pool_size, int, 0444);
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MODULE_PARM_DESC(rds_ib_mr_1m_pool_size, " Max number of 1M mr per HCA");
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module_param(rds_ib_mr_8k_pool_size, int, 0444);
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MODULE_PARM_DESC(rds_ib_mr_8k_pool_size, " Max number of 8K mr per HCA");
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module_param(rds_ib_retry_count, int, 0444);
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MODULE_PARM_DESC(rds_ib_retry_count, " Number of hw retries before reporting an error");
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/*
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* we have a clumsy combination of RCU and a rwsem protecting this list
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* because it is used both in the get_mr fast path and while blocking in
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* the FMR flushing path.
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*/
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DECLARE_RWSEM(rds_ib_devices_lock);
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struct list_head rds_ib_devices;
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/* NOTE: if also grabbing ibdev lock, grab this first */
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DEFINE_SPINLOCK(ib_nodev_conns_lock);
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LIST_HEAD(ib_nodev_conns);
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static void rds_ib_nodev_connect(void)
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{
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struct rds_ib_connection *ic;
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spin_lock(&ib_nodev_conns_lock);
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list_for_each_entry(ic, &ib_nodev_conns, ib_node)
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rds_conn_connect_if_down(ic->conn);
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spin_unlock(&ib_nodev_conns_lock);
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}
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static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev)
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{
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struct rds_ib_connection *ic;
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unsigned long flags;
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spin_lock_irqsave(&rds_ibdev->spinlock, flags);
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list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node)
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rds_conn_path_drop(&ic->conn->c_path[0], true);
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spin_unlock_irqrestore(&rds_ibdev->spinlock, flags);
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}
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/*
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* rds_ib_destroy_mr_pool() blocks on a few things and mrs drop references
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* from interrupt context so we push freing off into a work struct in krdsd.
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*/
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static void rds_ib_dev_free(struct work_struct *work)
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{
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struct rds_ib_ipaddr *i_ipaddr, *i_next;
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struct rds_ib_device *rds_ibdev = container_of(work,
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struct rds_ib_device, free_work);
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if (rds_ibdev->mr_8k_pool)
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rds_ib_destroy_mr_pool(rds_ibdev->mr_8k_pool);
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if (rds_ibdev->mr_1m_pool)
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rds_ib_destroy_mr_pool(rds_ibdev->mr_1m_pool);
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if (rds_ibdev->pd)
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ib_dealloc_pd(rds_ibdev->pd);
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list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) {
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list_del(&i_ipaddr->list);
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kfree(i_ipaddr);
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}
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kfree(rds_ibdev->vector_load);
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kfree(rds_ibdev);
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}
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void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
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{
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BUG_ON(refcount_read(&rds_ibdev->refcount) == 0);
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if (refcount_dec_and_test(&rds_ibdev->refcount))
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queue_work(rds_wq, &rds_ibdev->free_work);
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}
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static void rds_ib_add_one(struct ib_device *device)
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{
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struct rds_ib_device *rds_ibdev;
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bool has_fr, has_fmr;
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/* Only handle IB (no iWARP) devices */
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if (device->node_type != RDMA_NODE_IB_CA)
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return;
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rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL,
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ibdev_to_node(device));
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if (!rds_ibdev)
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return;
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spin_lock_init(&rds_ibdev->spinlock);
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refcount_set(&rds_ibdev->refcount, 1);
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INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free);
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rds_ibdev->max_wrs = device->attrs.max_qp_wr;
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rds_ibdev->max_sge = min(device->attrs.max_send_sge, RDS_IB_MAX_SGE);
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has_fr = (device->attrs.device_cap_flags &
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IB_DEVICE_MEM_MGT_EXTENSIONS);
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has_fmr = (device->ops.alloc_fmr && device->ops.dealloc_fmr &&
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device->ops.map_phys_fmr && device->ops.unmap_fmr);
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rds_ibdev->use_fastreg = (has_fr && !has_fmr);
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rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32;
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rds_ibdev->max_1m_mrs = device->attrs.max_mr ?
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min_t(unsigned int, (device->attrs.max_mr / 2),
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rds_ib_mr_1m_pool_size) : rds_ib_mr_1m_pool_size;
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rds_ibdev->max_8k_mrs = device->attrs.max_mr ?
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min_t(unsigned int, ((device->attrs.max_mr / 2) * RDS_MR_8K_SCALE),
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rds_ib_mr_8k_pool_size) : rds_ib_mr_8k_pool_size;
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rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom;
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rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom;
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rds_ibdev->vector_load = kcalloc(device->num_comp_vectors,
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sizeof(int),
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GFP_KERNEL);
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if (!rds_ibdev->vector_load) {
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pr_err("RDS/IB: %s failed to allocate vector memory\n",
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__func__);
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goto put_dev;
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}
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rds_ibdev->dev = device;
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rds_ibdev->pd = ib_alloc_pd(device, 0);
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if (IS_ERR(rds_ibdev->pd)) {
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rds_ibdev->pd = NULL;
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goto put_dev;
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}
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rds_ibdev->mr_1m_pool =
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rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_1M_POOL);
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if (IS_ERR(rds_ibdev->mr_1m_pool)) {
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rds_ibdev->mr_1m_pool = NULL;
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goto put_dev;
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}
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rds_ibdev->mr_8k_pool =
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rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_8K_POOL);
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if (IS_ERR(rds_ibdev->mr_8k_pool)) {
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rds_ibdev->mr_8k_pool = NULL;
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goto put_dev;
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}
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rdsdebug("RDS/IB: max_mr = %d, max_wrs = %d, max_sge = %d, fmr_max_remaps = %d, max_1m_mrs = %d, max_8k_mrs = %d\n",
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device->attrs.max_fmr, rds_ibdev->max_wrs, rds_ibdev->max_sge,
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rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs,
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rds_ibdev->max_8k_mrs);
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pr_info("RDS/IB: %s: %s supported and preferred\n",
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device->name,
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rds_ibdev->use_fastreg ? "FRMR" : "FMR");
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INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
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INIT_LIST_HEAD(&rds_ibdev->conn_list);
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down_write(&rds_ib_devices_lock);
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list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices);
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up_write(&rds_ib_devices_lock);
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refcount_inc(&rds_ibdev->refcount);
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ib_set_client_data(device, &rds_ib_client, rds_ibdev);
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refcount_inc(&rds_ibdev->refcount);
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rds_ib_nodev_connect();
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put_dev:
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rds_ib_dev_put(rds_ibdev);
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}
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/*
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* New connections use this to find the device to associate with the
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* connection. It's not in the fast path so we're not concerned about the
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* performance of the IB call. (As of this writing, it uses an interrupt
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* blocking spinlock to serialize walking a per-device list of all registered
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* clients.)
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*
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* RCU is used to handle incoming connections racing with device teardown.
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* Rather than use a lock to serialize removal from the client_data and
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* getting a new reference, we use an RCU grace period. The destruction
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* path removes the device from client_data and then waits for all RCU
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* readers to finish.
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*
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* A new connection can get NULL from this if its arriving on a
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* device that is in the process of being removed.
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*/
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struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device)
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{
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struct rds_ib_device *rds_ibdev;
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rcu_read_lock();
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rds_ibdev = ib_get_client_data(device, &rds_ib_client);
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if (rds_ibdev)
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refcount_inc(&rds_ibdev->refcount);
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rcu_read_unlock();
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return rds_ibdev;
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}
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/*
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* The IB stack is letting us know that a device is going away. This can
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* happen if the underlying HCA driver is removed or if PCI hotplug is removing
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* the pci function, for example.
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*
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* This can be called at any time and can be racing with any other RDS path.
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*/
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static void rds_ib_remove_one(struct ib_device *device, void *client_data)
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{
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struct rds_ib_device *rds_ibdev = client_data;
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if (!rds_ibdev)
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return;
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rds_ib_dev_shutdown(rds_ibdev);
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/* stop connection attempts from getting a reference to this device. */
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ib_set_client_data(device, &rds_ib_client, NULL);
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down_write(&rds_ib_devices_lock);
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list_del_rcu(&rds_ibdev->list);
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up_write(&rds_ib_devices_lock);
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/*
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* This synchronize rcu is waiting for readers of both the ib
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* client data and the devices list to finish before we drop
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* both of those references.
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*/
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synchronize_rcu();
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rds_ib_dev_put(rds_ibdev);
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rds_ib_dev_put(rds_ibdev);
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}
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struct ib_client rds_ib_client = {
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.name = "rds_ib",
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.add = rds_ib_add_one,
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.remove = rds_ib_remove_one
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};
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static int rds_ib_conn_info_visitor(struct rds_connection *conn,
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void *buffer)
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{
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struct rds_info_rdma_connection *iinfo = buffer;
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struct rds_ib_connection *ic;
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/* We will only ever look at IB transports */
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if (conn->c_trans != &rds_ib_transport)
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return 0;
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if (conn->c_isv6)
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return 0;
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iinfo->src_addr = conn->c_laddr.s6_addr32[3];
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iinfo->dst_addr = conn->c_faddr.s6_addr32[3];
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iinfo->tos = conn->c_tos;
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memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
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memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
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if (rds_conn_state(conn) == RDS_CONN_UP) {
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struct rds_ib_device *rds_ibdev;
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ic = conn->c_transport_data;
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rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo->src_gid,
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(union ib_gid *)&iinfo->dst_gid);
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rds_ibdev = ic->rds_ibdev;
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iinfo->max_send_wr = ic->i_send_ring.w_nr;
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iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
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iinfo->max_send_sge = rds_ibdev->max_sge;
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rds_ib_get_mr_info(rds_ibdev, iinfo);
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iinfo->cache_allocs = atomic_read(&ic->i_cache_allocs);
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}
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return 1;
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}
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#if IS_ENABLED(CONFIG_IPV6)
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/* IPv6 version of rds_ib_conn_info_visitor(). */
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static int rds6_ib_conn_info_visitor(struct rds_connection *conn,
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void *buffer)
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{
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struct rds6_info_rdma_connection *iinfo6 = buffer;
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struct rds_ib_connection *ic;
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/* We will only ever look at IB transports */
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if (conn->c_trans != &rds_ib_transport)
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return 0;
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iinfo6->src_addr = conn->c_laddr;
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iinfo6->dst_addr = conn->c_faddr;
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memset(&iinfo6->src_gid, 0, sizeof(iinfo6->src_gid));
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memset(&iinfo6->dst_gid, 0, sizeof(iinfo6->dst_gid));
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if (rds_conn_state(conn) == RDS_CONN_UP) {
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struct rds_ib_device *rds_ibdev;
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ic = conn->c_transport_data;
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rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo6->src_gid,
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(union ib_gid *)&iinfo6->dst_gid);
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rds_ibdev = ic->rds_ibdev;
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iinfo6->max_send_wr = ic->i_send_ring.w_nr;
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iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;
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iinfo6->max_send_sge = rds_ibdev->max_sge;
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rds6_ib_get_mr_info(rds_ibdev, iinfo6);
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iinfo6->cache_allocs = atomic_read(&ic->i_cache_allocs);
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}
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return 1;
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}
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#endif
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static void rds_ib_ic_info(struct socket *sock, unsigned int len,
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struct rds_info_iterator *iter,
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struct rds_info_lengths *lens)
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{
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u64 buffer[(sizeof(struct rds_info_rdma_connection) + 7) / 8];
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rds_for_each_conn_info(sock, len, iter, lens,
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rds_ib_conn_info_visitor,
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buffer,
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sizeof(struct rds_info_rdma_connection));
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}
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#if IS_ENABLED(CONFIG_IPV6)
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/* IPv6 version of rds_ib_ic_info(). */
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static void rds6_ib_ic_info(struct socket *sock, unsigned int len,
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struct rds_info_iterator *iter,
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struct rds_info_lengths *lens)
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{
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u64 buffer[(sizeof(struct rds6_info_rdma_connection) + 7) / 8];
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rds_for_each_conn_info(sock, len, iter, lens,
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rds6_ib_conn_info_visitor,
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buffer,
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sizeof(struct rds6_info_rdma_connection));
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}
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#endif
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/*
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* Early RDS/IB was built to only bind to an address if there is an IPoIB
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* device with that address set.
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*
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* If it were me, I'd advocate for something more flexible. Sending and
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* receiving should be device-agnostic. Transports would try and maintain
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* connections between peers who have messages queued. Userspace would be
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* allowed to influence which paths have priority. We could call userspace
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* asserting this policy "routing".
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*/
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static int rds_ib_laddr_check(struct net *net, const struct in6_addr *addr,
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__u32 scope_id)
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{
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int ret;
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struct rdma_cm_id *cm_id;
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#if IS_ENABLED(CONFIG_IPV6)
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struct sockaddr_in6 sin6;
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#endif
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struct sockaddr_in sin;
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struct sockaddr *sa;
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bool isv4;
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isv4 = ipv6_addr_v4mapped(addr);
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/* Create a CMA ID and try to bind it. This catches both
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* IB and iWARP capable NICs.
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*/
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cm_id = rdma_create_id(&init_net, rds_rdma_cm_event_handler,
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NULL, RDMA_PS_TCP, IB_QPT_RC);
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if (IS_ERR(cm_id))
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return PTR_ERR(cm_id);
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if (isv4) {
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = addr->s6_addr32[3];
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sa = (struct sockaddr *)&sin;
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} else {
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#if IS_ENABLED(CONFIG_IPV6)
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memset(&sin6, 0, sizeof(sin6));
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sin6.sin6_family = AF_INET6;
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sin6.sin6_addr = *addr;
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sin6.sin6_scope_id = scope_id;
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sa = (struct sockaddr *)&sin6;
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/* XXX Do a special IPv6 link local address check here. The
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* reason is that rdma_bind_addr() always succeeds with IPv6
|
|
* link local address regardless it is indeed configured in a
|
|
* system.
|
|
*/
|
|
if (ipv6_addr_type(addr) & IPV6_ADDR_LINKLOCAL) {
|
|
struct net_device *dev;
|
|
|
|
if (scope_id == 0) {
|
|
ret = -EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
|
|
/* Use init_net for now as RDS is not network
|
|
* name space aware.
|
|
*/
|
|
dev = dev_get_by_index(&init_net, scope_id);
|
|
if (!dev) {
|
|
ret = -EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
if (!ipv6_chk_addr(&init_net, addr, dev, 1)) {
|
|
dev_put(dev);
|
|
ret = -EADDRNOTAVAIL;
|
|
goto out;
|
|
}
|
|
dev_put(dev);
|
|
}
|
|
#else
|
|
ret = -EADDRNOTAVAIL;
|
|
goto out;
|
|
#endif
|
|
}
|
|
|
|
/* rdma_bind_addr will only succeed for IB & iWARP devices */
|
|
ret = rdma_bind_addr(cm_id, sa);
|
|
/* due to this, we will claim to support iWARP devices unless we
|
|
check node_type. */
|
|
if (ret || !cm_id->device ||
|
|
cm_id->device->node_type != RDMA_NODE_IB_CA)
|
|
ret = -EADDRNOTAVAIL;
|
|
|
|
rdsdebug("addr %pI6c%%%u ret %d node type %d\n",
|
|
addr, scope_id, ret,
|
|
cm_id->device ? cm_id->device->node_type : -1);
|
|
|
|
out:
|
|
rdma_destroy_id(cm_id);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void rds_ib_unregister_client(void)
|
|
{
|
|
ib_unregister_client(&rds_ib_client);
|
|
/* wait for rds_ib_dev_free() to complete */
|
|
flush_workqueue(rds_wq);
|
|
}
|
|
|
|
static void rds_ib_set_unloading(void)
|
|
{
|
|
atomic_set(&rds_ib_unloading, 1);
|
|
}
|
|
|
|
static bool rds_ib_is_unloading(struct rds_connection *conn)
|
|
{
|
|
struct rds_conn_path *cp = &conn->c_path[0];
|
|
|
|
return (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags) ||
|
|
atomic_read(&rds_ib_unloading) != 0);
|
|
}
|
|
|
|
void rds_ib_exit(void)
|
|
{
|
|
rds_ib_set_unloading();
|
|
synchronize_rcu();
|
|
rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
rds_info_deregister_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
|
|
#endif
|
|
rds_ib_unregister_client();
|
|
rds_ib_destroy_nodev_conns();
|
|
rds_ib_sysctl_exit();
|
|
rds_ib_recv_exit();
|
|
rds_trans_unregister(&rds_ib_transport);
|
|
rds_ib_mr_exit();
|
|
}
|
|
|
|
static u8 rds_ib_get_tos_map(u8 tos)
|
|
{
|
|
/* 1:1 user to transport map for RDMA transport.
|
|
* In future, if custom map is desired, hook can export
|
|
* user configurable map.
|
|
*/
|
|
return tos;
|
|
}
|
|
|
|
struct rds_transport rds_ib_transport = {
|
|
.laddr_check = rds_ib_laddr_check,
|
|
.xmit_path_complete = rds_ib_xmit_path_complete,
|
|
.xmit = rds_ib_xmit,
|
|
.xmit_rdma = rds_ib_xmit_rdma,
|
|
.xmit_atomic = rds_ib_xmit_atomic,
|
|
.recv_path = rds_ib_recv_path,
|
|
.conn_alloc = rds_ib_conn_alloc,
|
|
.conn_free = rds_ib_conn_free,
|
|
.conn_path_connect = rds_ib_conn_path_connect,
|
|
.conn_path_shutdown = rds_ib_conn_path_shutdown,
|
|
.inc_copy_to_user = rds_ib_inc_copy_to_user,
|
|
.inc_free = rds_ib_inc_free,
|
|
.cm_initiate_connect = rds_ib_cm_initiate_connect,
|
|
.cm_handle_connect = rds_ib_cm_handle_connect,
|
|
.cm_connect_complete = rds_ib_cm_connect_complete,
|
|
.stats_info_copy = rds_ib_stats_info_copy,
|
|
.exit = rds_ib_exit,
|
|
.get_mr = rds_ib_get_mr,
|
|
.sync_mr = rds_ib_sync_mr,
|
|
.free_mr = rds_ib_free_mr,
|
|
.flush_mrs = rds_ib_flush_mrs,
|
|
.get_tos_map = rds_ib_get_tos_map,
|
|
.t_owner = THIS_MODULE,
|
|
.t_name = "infiniband",
|
|
.t_unloading = rds_ib_is_unloading,
|
|
.t_type = RDS_TRANS_IB
|
|
};
|
|
|
|
int rds_ib_init(void)
|
|
{
|
|
int ret;
|
|
|
|
INIT_LIST_HEAD(&rds_ib_devices);
|
|
|
|
ret = rds_ib_mr_init();
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_register_client(&rds_ib_client);
|
|
if (ret)
|
|
goto out_mr_exit;
|
|
|
|
ret = rds_ib_sysctl_init();
|
|
if (ret)
|
|
goto out_ibreg;
|
|
|
|
ret = rds_ib_recv_init();
|
|
if (ret)
|
|
goto out_sysctl;
|
|
|
|
rds_trans_register(&rds_ib_transport);
|
|
|
|
rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
rds_info_register_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
|
|
#endif
|
|
|
|
goto out;
|
|
|
|
out_sysctl:
|
|
rds_ib_sysctl_exit();
|
|
out_ibreg:
|
|
rds_ib_unregister_client();
|
|
out_mr_exit:
|
|
rds_ib_mr_exit();
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|