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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id s3sm7103631qkj.27.2020.10.26.11.54.41 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 26 Oct 2020 11:54:42 -0700 (PDT) Sender: Chuck Lever Received: from klimt.1015granger.net (klimt.1015granger.net [192.168.1.55]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id 09QIseIH013640; Mon, 26 Oct 2020 18:54:40 GMT Subject: [PATCH 09/20] svcrdma: Use parsed chunk lists to derive the inv_rkey From: Chuck Lever To: linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org Date: Mon, 26 Oct 2020 14:54:40 -0400 Message-ID: <160373848080.1886.5015616032132594298.stgit@klimt.1015granger.net> In-Reply-To: <160373843299.1886.12604782813896379719.stgit@klimt.1015granger.net> References: <160373843299.1886.12604782813896379719.stgit@klimt.1015granger.net> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Refactor: Don't duplicate header decoding smarts here. Instead, use the new parsed chunk lists. Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 67 ++++++++++++++----------------- 1 file changed, 30 insertions(+), 37 deletions(-) diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index ec9d259b149c..2755ca178b09 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -586,60 +586,53 @@ static bool xdr_check_reply_chunk(struct svc_rdma_recv_ctxt *rctxt) * * If there is exactly one distinct R_key in the received transport * header, set rc_inv_rkey to that R_key. Otherwise, set it to zero. - * - * Perform this operation while the received transport header is - * still in the CPU cache. */ static void svc_rdma_get_inv_rkey(struct svcxprt_rdma *rdma, struct svc_rdma_recv_ctxt *ctxt) { - __be32 inv_rkey, *p; - u32 i, segcount; + struct svc_rdma_segment *segment; + struct svc_rdma_chunk *chunk; + u32 inv_rkey; ctxt->rc_inv_rkey = 0; if (!rdma->sc_snd_w_inv) return; - inv_rkey = xdr_zero; - p = ctxt->rc_recv_buf; - p += rpcrdma_fixed_maxsz; - - /* Read list */ - while (xdr_item_is_present(p++)) { - p++; /* position */ - if (inv_rkey == xdr_zero) - inv_rkey = *p; - else if (inv_rkey != *p) - return; - p += 4; + inv_rkey = 0; + pcl_for_each_chunk(chunk, &ctxt->rc_call_pcl) { + pcl_for_each_segment(segment, chunk) { + if (inv_rkey == 0) + inv_rkey = segment->rs_handle; + else if (inv_rkey != segment->rs_handle) + return; + } } - - /* Write list */ - while (xdr_item_is_present(p++)) { - segcount = be32_to_cpup(p++); - for (i = 0; i < segcount; i++) { - if (inv_rkey == xdr_zero) - inv_rkey = *p; - else if (inv_rkey != *p) + pcl_for_each_chunk(chunk, &ctxt->rc_read_pcl) { + pcl_for_each_segment(segment, chunk) { + if (inv_rkey == 0) + inv_rkey = segment->rs_handle; + else if (inv_rkey != segment->rs_handle) return; - p += 4; } } - - /* Reply chunk */ - if (xdr_item_is_present(p++)) { - segcount = be32_to_cpup(p++); - for (i = 0; i < segcount; i++) { - if (inv_rkey == xdr_zero) - inv_rkey = *p; - else if (inv_rkey != *p) + pcl_for_each_chunk(chunk, &ctxt->rc_write_pcl) { + pcl_for_each_segment(segment, chunk) { + if (inv_rkey == 0) + inv_rkey = segment->rs_handle; + else if (inv_rkey != segment->rs_handle) return; - p += 4; } } - - ctxt->rc_inv_rkey = be32_to_cpu(inv_rkey); + pcl_for_each_chunk(chunk, &ctxt->rc_reply_pcl) { + pcl_for_each_segment(segment, chunk) { + if (inv_rkey == 0) + inv_rkey = segment->rs_handle; + else if (inv_rkey != segment->rs_handle) + return; + } + } + ctxt->rc_inv_rkey = inv_rkey; } /**