From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031570AbbKDW27 (ORCPT ); Wed, 4 Nov 2015 17:28:59 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60415 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031016AbbKDWIl (ORCPT ); Wed, 4 Nov 2015 17:08:41 -0500 From: mchristi@redhat.com To: linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, drbd-dev@lists.linbit.com Cc: Mike Christie Subject: [PATCH 06/32] xen blkback: prepare for bi_rw split Date: Wed, 4 Nov 2015 16:08:03 -0600 Message-Id: <1446674909-5371-7-git-send-email-mchristi@redhat.com> In-Reply-To: <1446674909-5371-1-git-send-email-mchristi@redhat.com> References: <1446674909-5371-1-git-send-email-mchristi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Christie This patch prepares xen blkback submit_bio use for the next patches that split bi_rw into a operation and flags field. Instead of passing in a bitmap with both the operation and flags mixed in, the callers will now pass them in seperately. This patch modifies the code related to the submit_bio calls so the flags and operation are seperated. When this is done for all code, one of the later patches in the series will modify the actual submit_bio call, so the patches are bisectable. Signed-off-by: Mike Christie --- drivers/block/xen-blkback/blkback.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 6a685ae..bfffab3 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -488,7 +488,7 @@ static int xen_vbd_translate(struct phys_req *req, struct xen_blkif *blkif, struct xen_vbd *vbd = &blkif->vbd; int rc = -EACCES; - if ((operation != READ) && vbd->readonly) + if ((operation != REQ_OP_READ) && vbd->readonly) goto out; if (likely(req->nr_sects)) { @@ -990,7 +990,7 @@ static int dispatch_discard_io(struct xen_blkif *blkif, preq.sector_number = req->u.discard.sector_number; preq.nr_sects = req->u.discard.nr_sectors; - err = xen_vbd_translate(&preq, blkif, WRITE); + err = xen_vbd_translate(&preq, blkif, REQ_OP_WRITE); if (err) { pr_warn("access denied: DISCARD [%llu->%llu] on dev=%04x\n", preq.sector_number, @@ -1203,6 +1203,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, struct bio **biolist = pending_req->biolist; int i, nbio = 0; int operation; + int operation_flags = 0; struct blk_plug plug; bool drain = false; struct grant_page **pages = pending_req->segments; @@ -1220,17 +1221,19 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, switch (req_operation) { case BLKIF_OP_READ: blkif->st_rd_req++; - operation = READ; + operation = REQ_OP_READ; break; case BLKIF_OP_WRITE: blkif->st_wr_req++; - operation = WRITE_ODIRECT; + operation = REQ_OP_WRITE; + operation_flags = WRITE_ODIRECT; break; case BLKIF_OP_WRITE_BARRIER: drain = true; case BLKIF_OP_FLUSH_DISKCACHE: blkif->st_f_req++; - operation = WRITE_FLUSH; + operation = REQ_OP_WRITE; + operation_flags = WRITE_FLUSH; break; default: operation = 0; /* make gcc happy */ @@ -1242,7 +1245,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, nseg = req->operation == BLKIF_OP_INDIRECT ? req->u.indirect.nr_segments : req->u.rw.nr_segments; - if (unlikely(nseg == 0 && operation != WRITE_FLUSH) || + if (unlikely(nseg == 0 && operation_flags != WRITE_FLUSH) || unlikely((req->operation != BLKIF_OP_INDIRECT) && (nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) || unlikely((req->operation == BLKIF_OP_INDIRECT) && @@ -1349,7 +1352,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, /* This will be hit if the operation was a flush or discard. */ if (!bio) { - BUG_ON(operation != WRITE_FLUSH); + BUG_ON(operation_flags != WRITE_FLUSH); bio = bio_alloc(GFP_KERNEL, 0); if (unlikely(bio == NULL)) @@ -1365,14 +1368,14 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, blk_start_plug(&plug); for (i = 0; i < nbio; i++) - submit_bio(operation, biolist[i]); + submit_bio(operation | operation_flags, biolist[i]); /* Let the I/Os go.. */ blk_finish_plug(&plug); - if (operation == READ) + if (operation == REQ_OP_READ) blkif->st_rd_sect += preq.nr_sects; - else if (operation & WRITE) + else if (operation == REQ_OP_WRITE) blkif->st_wr_sect += preq.nr_sects; return 0; -- 1.8.3.1