From: Mike Christie <mchristi@xxxxxxxxxx>
This patch has xen set the bio bi_op to a REQ_OP, and rq_flag_bits
to bi_rw.
This patch is compile tested only.
Signed-off-by: Mike Christie <mchristi@xxxxxxxxxx>
---
drivers/block/xen-blkback/blkback.c | 29 +++++++++++++++++------------
1 file changed, 17 insertions(+), 12 deletions(-)
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 733d397..f977d29 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)) {
@@ -995,7 +995,7 @@ 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,
@@ -1208,6 +1208,7 @@ 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;
@@ -1226,17 +1227,19 @@ 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 */
@@ -1248,7 +1251,7 @@ 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) &&
@@ -1289,7 +1292,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
if (xen_vbd_translate(&preq, 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,
blkif->vbd.pdevice);
@@ -1348,7 +1351,8 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
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->bi_op = operation;
+ bio->bi_rw = operation_flags;
}
preq.sector_number += seg[i].nsec;
@@ -1356,7 +1360,7 @@ 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))
@@ -1366,7 +1370,8 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
bio->bi_bdev = preq.bdev;
bio->bi_private = pending_req;
bio->bi_end_io = end_block_io_op;
- bio->bi_rw = operation;
+ bio->bi_op = operation;
+ bio->bi_rw = operation_flags;
}
atomic_set(&pending_req->pendcnt, nbio);
@@ -1378,9 +1383,9 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
/* 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
--
dm-devel mailing list
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
