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xen: use bio op accessors

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Separate the op from the rq_flag_bits and have xen
set/get the bio using bio_set_op_attrs/bio_op.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Mike Christie 2016-06-05 14:32:09 -05:00 committed by Jens Axboe
parent e742fc32fc
commit a022606e53
1 changed files with 15 additions and 12 deletions
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27
drivers/block/xen-blkback/blkback.c
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@ -501,7 +501,7 @@ 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)) {
@ -1014,7 +1014,7 @@ static int dispatch_discard_io(struct xen_blkif_ring *ring,
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,
@ -1229,6 +1229,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
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;
@ -1247,17 +1248,19 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
switch (req_operation) {
case BLKIF_OP_READ:
ring->st_rd_req++;
operation = READ;
operation = REQ_OP_READ;
break;
case BLKIF_OP_WRITE:
ring->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:
ring->st_f_req++;
operation = WRITE_FLUSH;
operation = REQ_OP_WRITE;
operation_flags = WRITE_FLUSH;
break;
default:
operation = 0; /* make gcc happy */
@ -1269,7 +1272,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
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) &&
@ -1310,7 +1313,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
if (xen_vbd_translate(&preq, ring->blkif, operation) != 0) {
pr_debug("access denied: %s of [%llu,%llu] on dev=%04x\n",
operation == READ ? "read" : "write",
operation == REQ_OP_READ ? "read" : "write",
preq.sector_number,
preq.sector_number + preq.nr_sects,
ring->blkif->vbd.pdevice);
@ -1369,7 +1372,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
bio->bi_private = pending_req;
bio->bi_end_io = end_block_io_op;
bio->bi_iter.bi_sector = preq.sector_number;
bio->bi_rw = operation;
bio_set_op_attrs(bio, operation, operation_flags);
}
preq.sector_number += seg[i].nsec;
@ -1377,7 +1380,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
/* 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))
@ -1387,7 +1390,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
bio->bi_bdev = preq.bdev;
bio->bi_private = pending_req;
bio->bi_end_io = end_block_io_op;
bio->bi_rw = operation;
bio_set_op_attrs(bio, operation, operation_flags);
}
atomic_set(&pending_req->pendcnt, nbio);
@ -1399,9 +1402,9 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
/* Let the I/Os go.. */
blk_finish_plug(&plug);
if (operation == READ)
if (operation == REQ_OP_READ)
ring->st_rd_sect += preq.nr_sects;
else if (operation & WRITE)
else if (operation == REQ_OP_WRITE)
ring->st_wr_sect += preq.nr_sects;
return 0;