Return-Path: Received: from mail-io0-f193.google.com ([209.85.223.193]:35936 "EHLO mail-io0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754058AbdAZR4g (ORCPT ); Thu, 26 Jan 2017 12:56:36 -0500 Subject: [PATCH v1 3/7] xprtrdma: Refactor management of mw_list field From: Chuck Lever To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Thu, 26 Jan 2017 12:55:55 -0500 Message-ID: <20170126175555.5794.38459.stgit@manet.1015granger.net> In-Reply-To: <20170126174806.5794.14678.stgit@manet.1015granger.net> References: <20170126174806.5794.14678.stgit@manet.1015granger.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: Clean up some duplicate code. Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/fmr_ops.c | 5 +---- net/sunrpc/xprtrdma/frwr_ops.c | 11 ++++------- net/sunrpc/xprtrdma/rpc_rdma.c | 6 +++--- net/sunrpc/xprtrdma/verbs.c | 15 +++++---------- net/sunrpc/xprtrdma/xprt_rdma.h | 16 ++++++++++++++++ 5 files changed, 29 insertions(+), 24 deletions(-) diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index 1ebb09e..59e6402 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -310,10 +310,7 @@ enum { struct rpcrdma_mw *mw; while (!list_empty(&req->rl_registered)) { - mw = list_first_entry(&req->rl_registered, - struct rpcrdma_mw, mw_list); - list_del_init(&mw->mw_list); - + mw = rpcrdma_pop_mw(&req->rl_registered); if (sync) fmr_op_recover_mr(mw); else diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 47bed53..f81dd93 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -466,8 +466,8 @@ struct ib_send_wr *first, **prev, *last, *bad_wr; struct rpcrdma_rep *rep = req->rl_reply; struct rpcrdma_ia *ia = &r_xprt->rx_ia; - struct rpcrdma_mw *mw, *tmp; struct rpcrdma_frmr *f; + struct rpcrdma_mw *mw; int count, rc; dprintk("RPC: %s: req %p\n", __func__, req); @@ -534,10 +534,10 @@ * them to the free MW list. */ unmap: - list_for_each_entry_safe(mw, tmp, &req->rl_registered, mw_list) { + while (!list_empty(&req->rl_registered)) { + mw = rpcrdma_pop_mw(&req->rl_registered); dprintk("RPC: %s: DMA unmapping frmr %p\n", __func__, &mw->frmr); - list_del_init(&mw->mw_list); ib_dma_unmap_sg(ia->ri_device, mw->mw_sg, mw->mw_nents, mw->mw_dir); rpcrdma_put_mw(r_xprt, mw); @@ -571,10 +571,7 @@ struct rpcrdma_mw *mw; while (!list_empty(&req->rl_registered)) { - mw = list_first_entry(&req->rl_registered, - struct rpcrdma_mw, mw_list); - list_del_init(&mw->mw_list); - + mw = rpcrdma_pop_mw(&req->rl_registered); if (sync) frwr_op_recover_mr(mw); else diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 0ce7a7b..4276ee4 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -322,7 +322,7 @@ static bool rpcrdma_results_inline(struct rpcrdma_xprt *r_xprt, false, &mw); if (n < 0) return ERR_PTR(n); - list_add(&mw->mw_list, &req->rl_registered); + rpcrdma_push_mw(mw, &req->rl_registered); *iptr++ = xdr_one; /* item present */ @@ -390,7 +390,7 @@ static bool rpcrdma_results_inline(struct rpcrdma_xprt *r_xprt, true, &mw); if (n < 0) return ERR_PTR(n); - list_add(&mw->mw_list, &req->rl_registered); + rpcrdma_push_mw(mw, &req->rl_registered); iptr = xdr_encode_rdma_segment(iptr, mw); @@ -455,7 +455,7 @@ static bool rpcrdma_results_inline(struct rpcrdma_xprt *r_xprt, true, &mw); if (n < 0) return ERR_PTR(n); - list_add(&mw->mw_list, &req->rl_registered); + rpcrdma_push_mw(mw, &req->rl_registered); iptr = xdr_encode_rdma_segment(iptr, mw); diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 45db2b4..7e14b73 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -775,9 +775,7 @@ static void rpcrdma_destroy_id(struct rdma_cm_id *id) spin_lock(&buf->rb_recovery_lock); while (!list_empty(&buf->rb_stale_mrs)) { - mw = list_first_entry(&buf->rb_stale_mrs, - struct rpcrdma_mw, mw_list); - list_del_init(&mw->mw_list); + mw = rpcrdma_pop_mw(&buf->rb_stale_mrs); spin_unlock(&buf->rb_recovery_lock); dprintk("RPC: %s: recovering MR %p\n", __func__, mw); @@ -795,7 +793,7 @@ static void rpcrdma_destroy_id(struct rdma_cm_id *id) struct rpcrdma_buffer *buf = &r_xprt->rx_buf; spin_lock(&buf->rb_recovery_lock); - list_add(&mw->mw_list, &buf->rb_stale_mrs); + rpcrdma_push_mw(mw, &buf->rb_stale_mrs); spin_unlock(&buf->rb_recovery_lock); schedule_delayed_work(&buf->rb_recovery_worker, 0); @@ -1071,11 +1069,8 @@ struct rpcrdma_mw * struct rpcrdma_mw *mw = NULL; spin_lock(&buf->rb_mwlock); - if (!list_empty(&buf->rb_mws)) { - mw = list_first_entry(&buf->rb_mws, - struct rpcrdma_mw, mw_list); - list_del_init(&mw->mw_list); - } + if (!list_empty(&buf->rb_mws)) + mw = rpcrdma_pop_mw(&buf->rb_mws); spin_unlock(&buf->rb_mwlock); if (!mw) @@ -1098,7 +1093,7 @@ struct rpcrdma_mw * struct rpcrdma_buffer *buf = &r_xprt->rx_buf; spin_lock(&buf->rb_mwlock); - list_add_tail(&mw->mw_list, &buf->rb_mws); + rpcrdma_push_mw(mw, &buf->rb_mws); spin_unlock(&buf->rb_mwlock); } diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 852dd0a..171a351 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -354,6 +354,22 @@ struct rpcrdma_req { return rqst->rq_xprtdata; } +static inline void +rpcrdma_push_mw(struct rpcrdma_mw *mw, struct list_head *list) +{ + list_add_tail(&mw->mw_list, list); +} + +static inline struct rpcrdma_mw * +rpcrdma_pop_mw(struct list_head *list) +{ + struct rpcrdma_mw *mw; + + mw = list_first_entry(list, struct rpcrdma_mw, mw_list); + list_del(&mw->mw_list); + return mw; +} + /* * struct rpcrdma_buffer -- holds list/queue of pre-registered memory for * inline requests/replies, and client/server credits.