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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bebd031866
The device driver for the underlying physical device associated with an RPC-over-RDMA transport can be removed while RPC-over-RDMA transports are still in use (ie, while NFS filesystems are still mounted and active). The IB core performs a connection event upcall to request that consumers free all RDMA resources associated with a transport. There may be pending RPCs when this occurs. Care must be taken to release associated resources without leaving references that can trigger a subsequent crash if a signal or soft timeout occurs. We rely on the caller of the transport's ->close method to ensure that the previous RPC task has invoked xprt_release but the transport remains write-locked. A DEVICE_REMOVE upcall forces a disconnect then sleeps. When ->close is invoked, it destroys the transport's H/W resources, then wakes the upcall, which completes and allows the core driver unload to continue. BugLink: https://bugzilla.linux-nfs.org/show_bug.cgi?id=266 Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
636 lines
19 KiB
C
636 lines
19 KiB
C
/*
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* Copyright (c) 2003-2007 Network Appliance, Inc. 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 BSD-type
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following 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 provided
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* with the distribution.
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*
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* Neither the name of the Network Appliance, Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_SUNRPC_XPRT_RDMA_H
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#define _LINUX_SUNRPC_XPRT_RDMA_H
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#include <linux/wait.h> /* wait_queue_head_t, etc */
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#include <linux/spinlock.h> /* spinlock_t, etc */
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#include <linux/atomic.h> /* atomic_t, etc */
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#include <linux/workqueue.h> /* struct work_struct */
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#include <rdma/rdma_cm.h> /* RDMA connection api */
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#include <rdma/ib_verbs.h> /* RDMA verbs api */
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#include <linux/sunrpc/clnt.h> /* rpc_xprt */
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#include <linux/sunrpc/rpc_rdma.h> /* RPC/RDMA protocol */
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#include <linux/sunrpc/xprtrdma.h> /* xprt parameters */
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#define RDMA_RESOLVE_TIMEOUT (5000) /* 5 seconds */
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#define RDMA_CONNECT_RETRY_MAX (2) /* retries if no listener backlog */
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#define RPCRDMA_BIND_TO (60U * HZ)
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#define RPCRDMA_INIT_REEST_TO (5U * HZ)
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#define RPCRDMA_MAX_REEST_TO (30U * HZ)
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#define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ)
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/*
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* Interface Adapter -- one per transport instance
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*/
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struct rpcrdma_ia {
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const struct rpcrdma_memreg_ops *ri_ops;
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struct ib_device *ri_device;
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struct rdma_cm_id *ri_id;
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struct ib_pd *ri_pd;
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struct completion ri_done;
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struct completion ri_remove_done;
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int ri_async_rc;
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unsigned int ri_max_segs;
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unsigned int ri_max_frmr_depth;
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unsigned int ri_max_inline_write;
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unsigned int ri_max_inline_read;
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unsigned int ri_max_send_sges;
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bool ri_reminv_expected;
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bool ri_implicit_roundup;
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enum ib_mr_type ri_mrtype;
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unsigned long ri_flags;
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struct ib_qp_attr ri_qp_attr;
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struct ib_qp_init_attr ri_qp_init_attr;
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};
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enum {
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RPCRDMA_IAF_REMOVING = 0,
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};
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/*
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* RDMA Endpoint -- one per transport instance
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*/
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struct rpcrdma_ep {
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atomic_t rep_cqcount;
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int rep_cqinit;
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int rep_connected;
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struct ib_qp_init_attr rep_attr;
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wait_queue_head_t rep_connect_wait;
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struct rpcrdma_connect_private rep_cm_private;
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struct rdma_conn_param rep_remote_cma;
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struct sockaddr_storage rep_remote_addr;
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struct delayed_work rep_connect_worker;
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};
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static inline void
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rpcrdma_init_cqcount(struct rpcrdma_ep *ep, int count)
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{
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atomic_set(&ep->rep_cqcount, ep->rep_cqinit - count);
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}
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/* To update send queue accounting, provider must take a
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* send completion every now and then.
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*/
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static inline void
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rpcrdma_set_signaled(struct rpcrdma_ep *ep, struct ib_send_wr *send_wr)
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{
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send_wr->send_flags = 0;
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if (unlikely(atomic_sub_return(1, &ep->rep_cqcount) <= 0)) {
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rpcrdma_init_cqcount(ep, 0);
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send_wr->send_flags = IB_SEND_SIGNALED;
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}
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}
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/* Pre-allocate extra Work Requests for handling backward receives
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* and sends. This is a fixed value because the Work Queues are
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* allocated when the forward channel is set up.
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*/
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#if defined(CONFIG_SUNRPC_BACKCHANNEL)
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#define RPCRDMA_BACKWARD_WRS (8)
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#else
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#define RPCRDMA_BACKWARD_WRS (0)
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#endif
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/* Registered buffer -- registered kmalloc'd memory for RDMA SEND/RECV
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*
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* The below structure appears at the front of a large region of kmalloc'd
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* memory, which always starts on a good alignment boundary.
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*/
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struct rpcrdma_regbuf {
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struct ib_sge rg_iov;
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struct ib_device *rg_device;
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enum dma_data_direction rg_direction;
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__be32 rg_base[0] __attribute__ ((aligned(256)));
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};
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static inline u64
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rdmab_addr(struct rpcrdma_regbuf *rb)
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{
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return rb->rg_iov.addr;
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}
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static inline u32
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rdmab_length(struct rpcrdma_regbuf *rb)
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{
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return rb->rg_iov.length;
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}
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static inline u32
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rdmab_lkey(struct rpcrdma_regbuf *rb)
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{
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return rb->rg_iov.lkey;
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}
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static inline struct rpcrdma_msg *
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rdmab_to_msg(struct rpcrdma_regbuf *rb)
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{
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return (struct rpcrdma_msg *)rb->rg_base;
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}
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static inline struct ib_device *
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rdmab_device(struct rpcrdma_regbuf *rb)
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{
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return rb->rg_device;
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}
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#define RPCRDMA_DEF_GFP (GFP_NOIO | __GFP_NOWARN)
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/* To ensure a transport can always make forward progress,
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* the number of RDMA segments allowed in header chunk lists
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* is capped at 8. This prevents less-capable devices and
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* memory registrations from overrunning the Send buffer
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* while building chunk lists.
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*
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* Elements of the Read list take up more room than the
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* Write list or Reply chunk. 8 read segments means the Read
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* list (or Write list or Reply chunk) cannot consume more
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* than
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*
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* ((8 + 2) * read segment size) + 1 XDR words, or 244 bytes.
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*
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* And the fixed part of the header is another 24 bytes.
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*
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* The smallest inline threshold is 1024 bytes, ensuring that
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* at least 750 bytes are available for RPC messages.
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*/
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enum {
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RPCRDMA_MAX_HDR_SEGS = 8,
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RPCRDMA_HDRBUF_SIZE = 256,
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};
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/*
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* struct rpcrdma_rep -- this structure encapsulates state required to recv
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* and complete a reply, asychronously. It needs several pieces of
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* state:
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* o recv buffer (posted to provider)
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* o ib_sge (also donated to provider)
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* o status of reply (length, success or not)
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* o bookkeeping state to get run by reply handler (list, etc)
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*
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* These are allocated during initialization, per-transport instance.
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*
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* N of these are associated with a transport instance, and stored in
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* struct rpcrdma_buffer. N is the max number of outstanding requests.
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*/
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struct rpcrdma_rep {
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struct ib_cqe rr_cqe;
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unsigned int rr_len;
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int rr_wc_flags;
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u32 rr_inv_rkey;
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struct rpcrdma_xprt *rr_rxprt;
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struct work_struct rr_work;
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struct list_head rr_list;
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struct ib_recv_wr rr_recv_wr;
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struct rpcrdma_regbuf *rr_rdmabuf;
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};
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#define RPCRDMA_BAD_LEN (~0U)
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/*
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* struct rpcrdma_mw - external memory region metadata
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*
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* An external memory region is any buffer or page that is registered
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* on the fly (ie, not pre-registered).
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*
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* Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During
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* call_allocate, rpcrdma_buffer_get() assigns one to each segment in
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* an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep
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* track of registration metadata while each RPC is pending.
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* rpcrdma_deregister_external() uses this metadata to unmap and
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* release these resources when an RPC is complete.
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*/
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enum rpcrdma_frmr_state {
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FRMR_IS_INVALID, /* ready to be used */
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FRMR_IS_VALID, /* in use */
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FRMR_FLUSHED_FR, /* flushed FASTREG WR */
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FRMR_FLUSHED_LI, /* flushed LOCALINV WR */
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};
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struct rpcrdma_frmr {
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struct ib_mr *fr_mr;
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struct ib_cqe fr_cqe;
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enum rpcrdma_frmr_state fr_state;
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struct completion fr_linv_done;
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union {
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struct ib_reg_wr fr_regwr;
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struct ib_send_wr fr_invwr;
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};
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};
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struct rpcrdma_fmr {
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struct ib_fmr *fm_mr;
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u64 *fm_physaddrs;
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};
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struct rpcrdma_mw {
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struct list_head mw_list;
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struct scatterlist *mw_sg;
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int mw_nents;
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enum dma_data_direction mw_dir;
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union {
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struct rpcrdma_fmr fmr;
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struct rpcrdma_frmr frmr;
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};
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struct rpcrdma_xprt *mw_xprt;
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u32 mw_handle;
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u32 mw_length;
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u64 mw_offset;
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struct list_head mw_all;
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};
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/*
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* struct rpcrdma_req -- structure central to the request/reply sequence.
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*
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* N of these are associated with a transport instance, and stored in
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* struct rpcrdma_buffer. N is the max number of outstanding requests.
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*
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* It includes pre-registered buffer memory for send AND recv.
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* The recv buffer, however, is not owned by this structure, and
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* is "donated" to the hardware when a recv is posted. When a
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* reply is handled, the recv buffer used is given back to the
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* struct rpcrdma_req associated with the request.
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*
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* In addition to the basic memory, this structure includes an array
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* of iovs for send operations. The reason is that the iovs passed to
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* ib_post_{send,recv} must not be modified until the work request
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* completes.
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*/
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/* Maximum number of page-sized "segments" per chunk list to be
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* registered or invalidated. Must handle a Reply chunk:
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*/
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enum {
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RPCRDMA_MAX_IOV_SEGS = 3,
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RPCRDMA_MAX_DATA_SEGS = ((1 * 1024 * 1024) / PAGE_SIZE) + 1,
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RPCRDMA_MAX_SEGS = RPCRDMA_MAX_DATA_SEGS +
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RPCRDMA_MAX_IOV_SEGS,
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};
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struct rpcrdma_mr_seg { /* chunk descriptors */
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u32 mr_len; /* length of chunk or segment */
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struct page *mr_page; /* owning page, if any */
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char *mr_offset; /* kva if no page, else offset */
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};
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/* The Send SGE array is provisioned to send a maximum size
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* inline request:
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* - RPC-over-RDMA header
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* - xdr_buf head iovec
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* - RPCRDMA_MAX_INLINE bytes, in pages
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* - xdr_buf tail iovec
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*
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* The actual number of array elements consumed by each RPC
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* depends on the device's max_sge limit.
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*/
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enum {
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RPCRDMA_MIN_SEND_SGES = 3,
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RPCRDMA_MAX_PAGE_SGES = RPCRDMA_MAX_INLINE >> PAGE_SHIFT,
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RPCRDMA_MAX_SEND_SGES = 1 + 1 + RPCRDMA_MAX_PAGE_SGES + 1,
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};
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struct rpcrdma_buffer;
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struct rpcrdma_req {
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struct list_head rl_free;
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unsigned int rl_mapped_sges;
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unsigned int rl_connect_cookie;
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struct rpcrdma_buffer *rl_buffer;
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struct rpcrdma_rep *rl_reply;
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struct ib_send_wr rl_send_wr;
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struct ib_sge rl_send_sge[RPCRDMA_MAX_SEND_SGES];
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struct rpcrdma_regbuf *rl_rdmabuf; /* xprt header */
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struct rpcrdma_regbuf *rl_sendbuf; /* rq_snd_buf */
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struct rpcrdma_regbuf *rl_recvbuf; /* rq_rcv_buf */
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struct ib_cqe rl_cqe;
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struct list_head rl_all;
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bool rl_backchannel;
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struct list_head rl_registered; /* registered segments */
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struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS];
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};
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static inline void
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rpcrdma_set_xprtdata(struct rpc_rqst *rqst, struct rpcrdma_req *req)
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{
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rqst->rq_xprtdata = req;
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}
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static inline struct rpcrdma_req *
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rpcr_to_rdmar(struct rpc_rqst *rqst)
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{
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return rqst->rq_xprtdata;
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}
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static inline void
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rpcrdma_push_mw(struct rpcrdma_mw *mw, struct list_head *list)
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{
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list_add_tail(&mw->mw_list, list);
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}
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static inline struct rpcrdma_mw *
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rpcrdma_pop_mw(struct list_head *list)
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{
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struct rpcrdma_mw *mw;
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mw = list_first_entry(list, struct rpcrdma_mw, mw_list);
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list_del(&mw->mw_list);
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return mw;
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}
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/*
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* struct rpcrdma_buffer -- holds list/queue of pre-registered memory for
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* inline requests/replies, and client/server credits.
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*
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* One of these is associated with a transport instance
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*/
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struct rpcrdma_buffer {
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spinlock_t rb_mwlock; /* protect rb_mws list */
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struct list_head rb_mws;
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struct list_head rb_all;
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char *rb_pool;
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spinlock_t rb_lock; /* protect buf lists */
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int rb_send_count, rb_recv_count;
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struct list_head rb_send_bufs;
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struct list_head rb_recv_bufs;
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u32 rb_max_requests;
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atomic_t rb_credits; /* most recent credit grant */
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u32 rb_bc_srv_max_requests;
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spinlock_t rb_reqslock; /* protect rb_allreqs */
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struct list_head rb_allreqs;
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u32 rb_bc_max_requests;
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spinlock_t rb_recovery_lock; /* protect rb_stale_mrs */
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struct list_head rb_stale_mrs;
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struct delayed_work rb_recovery_worker;
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struct delayed_work rb_refresh_worker;
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};
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#define rdmab_to_ia(b) (&container_of((b), struct rpcrdma_xprt, rx_buf)->rx_ia)
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/*
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* Internal structure for transport instance creation. This
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* exists primarily for modularity.
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*
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* This data should be set with mount options
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*/
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struct rpcrdma_create_data_internal {
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struct sockaddr_storage addr; /* RDMA server address */
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unsigned int max_requests; /* max requests (slots) in flight */
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unsigned int rsize; /* mount rsize - max read hdr+data */
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unsigned int wsize; /* mount wsize - max write hdr+data */
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unsigned int inline_rsize; /* max non-rdma read data payload */
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unsigned int inline_wsize; /* max non-rdma write data payload */
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unsigned int padding; /* non-rdma write header padding */
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};
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/*
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* Statistics for RPCRDMA
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*/
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struct rpcrdma_stats {
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unsigned long read_chunk_count;
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unsigned long write_chunk_count;
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unsigned long reply_chunk_count;
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unsigned long long total_rdma_request;
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unsigned long long total_rdma_reply;
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unsigned long long pullup_copy_count;
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unsigned long long fixup_copy_count;
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unsigned long hardway_register_count;
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unsigned long failed_marshal_count;
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unsigned long bad_reply_count;
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unsigned long nomsg_call_count;
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unsigned long bcall_count;
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unsigned long mrs_recovered;
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unsigned long mrs_orphaned;
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unsigned long mrs_allocated;
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unsigned long local_inv_needed;
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};
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/*
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* Per-registration mode operations
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*/
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struct rpcrdma_xprt;
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struct rpcrdma_memreg_ops {
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int (*ro_map)(struct rpcrdma_xprt *,
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struct rpcrdma_mr_seg *, int, bool,
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struct rpcrdma_mw **);
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void (*ro_unmap_sync)(struct rpcrdma_xprt *,
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struct rpcrdma_req *);
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void (*ro_unmap_safe)(struct rpcrdma_xprt *,
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struct rpcrdma_req *, bool);
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void (*ro_recover_mr)(struct rpcrdma_mw *);
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int (*ro_open)(struct rpcrdma_ia *,
|
|
struct rpcrdma_ep *,
|
|
struct rpcrdma_create_data_internal *);
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|
size_t (*ro_maxpages)(struct rpcrdma_xprt *);
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|
int (*ro_init_mr)(struct rpcrdma_ia *,
|
|
struct rpcrdma_mw *);
|
|
void (*ro_release_mr)(struct rpcrdma_mw *);
|
|
const char *ro_displayname;
|
|
const int ro_send_w_inv_ok;
|
|
};
|
|
|
|
extern const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops;
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|
extern const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops;
|
|
|
|
/*
|
|
* RPCRDMA transport -- encapsulates the structures above for
|
|
* integration with RPC.
|
|
*
|
|
* The contained structures are embedded, not pointers,
|
|
* for convenience. This structure need not be visible externally.
|
|
*
|
|
* It is allocated and initialized during mount, and released
|
|
* during unmount.
|
|
*/
|
|
struct rpcrdma_xprt {
|
|
struct rpc_xprt rx_xprt;
|
|
struct rpcrdma_ia rx_ia;
|
|
struct rpcrdma_ep rx_ep;
|
|
struct rpcrdma_buffer rx_buf;
|
|
struct rpcrdma_create_data_internal rx_data;
|
|
struct delayed_work rx_connect_worker;
|
|
struct rpcrdma_stats rx_stats;
|
|
};
|
|
|
|
#define rpcx_to_rdmax(x) container_of(x, struct rpcrdma_xprt, rx_xprt)
|
|
#define rpcx_to_rdmad(x) (rpcx_to_rdmax(x)->rx_data)
|
|
|
|
/* Setting this to 0 ensures interoperability with early servers.
|
|
* Setting this to 1 enhances certain unaligned read/write performance.
|
|
* Default is 0, see sysctl entry and rpc_rdma.c rpcrdma_convert_iovs() */
|
|
extern int xprt_rdma_pad_optimize;
|
|
|
|
/* This setting controls the hunt for a supported memory
|
|
* registration strategy.
|
|
*/
|
|
extern unsigned int xprt_rdma_memreg_strategy;
|
|
|
|
/*
|
|
* Interface Adapter calls - xprtrdma/verbs.c
|
|
*/
|
|
int rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr);
|
|
void rpcrdma_ia_remove(struct rpcrdma_ia *ia);
|
|
void rpcrdma_ia_close(struct rpcrdma_ia *);
|
|
bool frwr_is_supported(struct rpcrdma_ia *);
|
|
bool fmr_is_supported(struct rpcrdma_ia *);
|
|
|
|
/*
|
|
* Endpoint calls - xprtrdma/verbs.c
|
|
*/
|
|
int rpcrdma_ep_create(struct rpcrdma_ep *, struct rpcrdma_ia *,
|
|
struct rpcrdma_create_data_internal *);
|
|
void rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *);
|
|
int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *);
|
|
void rpcrdma_conn_func(struct rpcrdma_ep *ep);
|
|
void rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *);
|
|
|
|
int rpcrdma_ep_post(struct rpcrdma_ia *, struct rpcrdma_ep *,
|
|
struct rpcrdma_req *);
|
|
int rpcrdma_ep_post_recv(struct rpcrdma_ia *, struct rpcrdma_rep *);
|
|
|
|
/*
|
|
* Buffer calls - xprtrdma/verbs.c
|
|
*/
|
|
struct rpcrdma_req *rpcrdma_create_req(struct rpcrdma_xprt *);
|
|
struct rpcrdma_rep *rpcrdma_create_rep(struct rpcrdma_xprt *);
|
|
void rpcrdma_destroy_req(struct rpcrdma_req *);
|
|
int rpcrdma_buffer_create(struct rpcrdma_xprt *);
|
|
void rpcrdma_buffer_destroy(struct rpcrdma_buffer *);
|
|
|
|
struct rpcrdma_mw *rpcrdma_get_mw(struct rpcrdma_xprt *);
|
|
void rpcrdma_put_mw(struct rpcrdma_xprt *, struct rpcrdma_mw *);
|
|
struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *);
|
|
void rpcrdma_buffer_put(struct rpcrdma_req *);
|
|
void rpcrdma_recv_buffer_get(struct rpcrdma_req *);
|
|
void rpcrdma_recv_buffer_put(struct rpcrdma_rep *);
|
|
|
|
void rpcrdma_defer_mr_recovery(struct rpcrdma_mw *);
|
|
|
|
struct rpcrdma_regbuf *rpcrdma_alloc_regbuf(size_t, enum dma_data_direction,
|
|
gfp_t);
|
|
bool __rpcrdma_dma_map_regbuf(struct rpcrdma_ia *, struct rpcrdma_regbuf *);
|
|
void rpcrdma_free_regbuf(struct rpcrdma_regbuf *);
|
|
|
|
static inline bool
|
|
rpcrdma_regbuf_is_mapped(struct rpcrdma_regbuf *rb)
|
|
{
|
|
return rb->rg_device != NULL;
|
|
}
|
|
|
|
static inline bool
|
|
rpcrdma_dma_map_regbuf(struct rpcrdma_ia *ia, struct rpcrdma_regbuf *rb)
|
|
{
|
|
if (likely(rpcrdma_regbuf_is_mapped(rb)))
|
|
return true;
|
|
return __rpcrdma_dma_map_regbuf(ia, rb);
|
|
}
|
|
|
|
int rpcrdma_ep_post_extra_recv(struct rpcrdma_xprt *, unsigned int);
|
|
|
|
int rpcrdma_alloc_wq(void);
|
|
void rpcrdma_destroy_wq(void);
|
|
|
|
/*
|
|
* Wrappers for chunk registration, shared by read/write chunk code.
|
|
*/
|
|
|
|
static inline enum dma_data_direction
|
|
rpcrdma_data_dir(bool writing)
|
|
{
|
|
return writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
|
}
|
|
|
|
/*
|
|
* RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c
|
|
*/
|
|
|
|
enum rpcrdma_chunktype {
|
|
rpcrdma_noch = 0,
|
|
rpcrdma_readch,
|
|
rpcrdma_areadch,
|
|
rpcrdma_writech,
|
|
rpcrdma_replych
|
|
};
|
|
|
|
bool rpcrdma_prepare_send_sges(struct rpcrdma_ia *, struct rpcrdma_req *,
|
|
u32, struct xdr_buf *, enum rpcrdma_chunktype);
|
|
void rpcrdma_unmap_sges(struct rpcrdma_ia *, struct rpcrdma_req *);
|
|
int rpcrdma_marshal_req(struct rpc_rqst *);
|
|
void rpcrdma_set_max_header_sizes(struct rpcrdma_xprt *);
|
|
void rpcrdma_reply_handler(struct work_struct *work);
|
|
|
|
/* RPC/RDMA module init - xprtrdma/transport.c
|
|
*/
|
|
extern unsigned int xprt_rdma_max_inline_read;
|
|
void xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap);
|
|
void xprt_rdma_free_addresses(struct rpc_xprt *xprt);
|
|
void rpcrdma_connect_worker(struct work_struct *work);
|
|
void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq);
|
|
int xprt_rdma_init(void);
|
|
void xprt_rdma_cleanup(void);
|
|
|
|
/* Backchannel calls - xprtrdma/backchannel.c
|
|
*/
|
|
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
|
|
int xprt_rdma_bc_setup(struct rpc_xprt *, unsigned int);
|
|
int xprt_rdma_bc_up(struct svc_serv *, struct net *);
|
|
size_t xprt_rdma_bc_maxpayload(struct rpc_xprt *);
|
|
int rpcrdma_bc_post_recv(struct rpcrdma_xprt *, unsigned int);
|
|
void rpcrdma_bc_receive_call(struct rpcrdma_xprt *, struct rpcrdma_rep *);
|
|
int rpcrdma_bc_marshal_reply(struct rpc_rqst *);
|
|
void xprt_rdma_bc_free_rqst(struct rpc_rqst *);
|
|
void xprt_rdma_bc_destroy(struct rpc_xprt *, unsigned int);
|
|
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
|
|
|
|
extern struct xprt_class xprt_rdma_bc;
|
|
|
|
#endif /* _LINUX_SUNRPC_XPRT_RDMA_H */
|