From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932276AbeE3Ttz (ORCPT ); Wed, 30 May 2018 15:49:55 -0400 Received: from a2nlsmtp01-02.prod.iad2.secureserver.net ([198.71.225.36]:51060 "EHLO a2nlsmtp01-02.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932237AbeE3Ttt (ORCPT ); Wed, 30 May 2018 15:49:49 -0400 x-originating-ip: 107.180.71.197 From: Long Li To: Steve French , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Long Li Subject: [Patch v2 08/15] CIFS: SMBD: Support page offset in RDMA send Date: Wed, 30 May 2018 12:48:00 -0700 Message-Id: <20180530194807.31657-9-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180530194807.31657-1-longli@linuxonhyperv.com> References: <20180530194807.31657-1-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com X-CMAE-Envelope: MS4wfPcgvQofKi5rY9GShqFu8E5FzrtTGr9bk/wrj/vvvV0h/fXUZ8kw7W8e+vRWst8kTY/Cc84DudGUCXsVFUcuPxigGSFP+3bPsMnkPp8GHM2srJ6wScS3 phW0DdrL+IG+/jYyUWMG2anVYImzhzPaBU3YRufx2MqaYwlMnczGpglr1/LXqFD5cSCRMkdxzFRu4pLgjvQOoUdjHUEzoGVc2d04FFVS/8h5FkL7CN544Cne 7h/mqXKKOTkNmWJTubEy8trrrx3peLbYUgYRzFcMHrna14TIxo1QhIT/77uM77tYIpfPWvY9Z0iBrnW0IcE7jRKJgRv2iaiRXtiD4sFL8GYn5oMDJaXsSq/b KfwFnRhBOZd58Ki7UgN9lMTLu2SfAYs2MBlrm3hc7RYTAR5PEAwch8wy+6Ga2igGc4JYGiHt Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Long Li The RDMA send function needs to look at offset in the request pages, and send data starting from there. Signed-off-by: Long Li --- fs/cifs/smbdirect.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index c62f7c9..6141e3c 100644 --- a/fs/cifs/smbdirect.c +++ b/fs/cifs/smbdirect.c @@ -17,6 +17,7 @@ #include #include "smbdirect.h" #include "cifs_debug.h" +#include "cifsproto.h" static struct smbd_response *get_empty_queue_buffer( struct smbd_connection *info); @@ -2082,7 +2083,7 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst) struct kvec vec; int nvecs; int size; - int buflen = 0, remaining_data_length; + unsigned int buflen = 0, remaining_data_length; int start, i, j; int max_iov_size = info->max_send_size - sizeof(struct smbd_data_transfer); @@ -2113,10 +2114,17 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst) buflen += iov[i].iov_len; } - /* add in the page array if there is one */ + /* + * Add in the page array if there is one. The caller needs to set + * rq_tailsz to PAGE_SIZE when the buffer has multiple pages and + * ends at page boundary + */ if (rqst->rq_npages) { - buflen += rqst->rq_pagesz * (rqst->rq_npages - 1); - buflen += rqst->rq_tailsz; + if (rqst->rq_npages == 1) + buflen += rqst->rq_tailsz; + else + buflen += rqst->rq_pagesz * (rqst->rq_npages - 1) - + rqst->rq_offset + rqst->rq_tailsz; } if (buflen + sizeof(struct smbd_data_transfer) > @@ -2213,8 +2221,9 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst) /* now sending pages if there are any */ for (i = 0; i < rqst->rq_npages; i++) { - buflen = (i == rqst->rq_npages-1) ? - rqst->rq_tailsz : rqst->rq_pagesz; + unsigned int offset; + + rqst_page_get_length(rqst, i, &buflen, &offset); nvecs = (buflen + max_iov_size - 1) / max_iov_size; log_write(INFO, "sending pages buflen=%d nvecs=%d\n", buflen, nvecs); @@ -2225,9 +2234,11 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst) remaining_data_length -= size; log_write(INFO, "sending pages i=%d offset=%d size=%d" " remaining_data_length=%d\n", - i, j*max_iov_size, size, remaining_data_length); + i, j*max_iov_size+offset, size, + remaining_data_length); rc = smbd_post_send_page( - info, rqst->rq_pages[i], j*max_iov_size, + info, rqst->rq_pages[i], + j*max_iov_size + offset, size, remaining_data_length); if (rc) goto done; -- 2.7.4