unsigned int nr_ring_pages;
struct request_queue *rq;
unsigned int feature_flush;
+ unsigned int feature_fua;
unsigned int feature_discard:1;
unsigned int feature_secdiscard:1;
unsigned int discard_granularity;
* The indirect operation can only be a BLKIF_OP_READ or
* BLKIF_OP_WRITE
*/
- BUG_ON(req->cmd_flags & (REQ_FLUSH | REQ_FUA));
+ BUG_ON(req_op(req) == REQ_OP_FLUSH || req->cmd_flags & REQ_FUA);
ring_req->operation = BLKIF_OP_INDIRECT;
ring_req->u.indirect.indirect_op = rq_data_dir(req) ?
BLKIF_OP_WRITE : BLKIF_OP_READ;
ring_req->u.rw.handle = info->handle;
ring_req->operation = rq_data_dir(req) ?
BLKIF_OP_WRITE : BLKIF_OP_READ;
- if (req->cmd_flags & (REQ_FLUSH | REQ_FUA)) {
+ if (req_op(req) == REQ_OP_FLUSH || req->cmd_flags & REQ_FUA) {
/*
* Ideally we can do an unordered flush-to-disk.
* In case the backend onlysupports barriers, use that.
* implement it the same way. (It's also a FLUSH+FUA,
* since it is guaranteed ordered WRT previous writes.)
*/
- switch (info->feature_flush &
- ((REQ_FLUSH|REQ_FUA))) {
- case REQ_FLUSH|REQ_FUA:
+ if (info->feature_flush && info->feature_fua)
ring_req->operation =
BLKIF_OP_WRITE_BARRIER;
- break;
- case REQ_FLUSH:
+ else if (info->feature_flush)
ring_req->operation =
BLKIF_OP_FLUSH_DISKCACHE;
- break;
- default:
+ else
ring_req->operation = 0;
- }
}
ring_req->u.rw.nr_segments = num_grant;
if (unlikely(require_extra_req)) {
if (unlikely(rinfo->dev_info->connected != BLKIF_STATE_CONNECTED))
return 1;
- if (unlikely(req->cmd_flags & (REQ_DISCARD | REQ_SECURE)))
+ if (unlikely(req_op(req) == REQ_OP_DISCARD ||
+ req->cmd_flags & REQ_SECURE))
return blkif_queue_discard_req(req, rinfo);
else
return blkif_queue_rw_req(req, rinfo);
struct blkfront_info *info)
{
return ((req->cmd_type != REQ_TYPE_FS) ||
- ((req->cmd_flags & REQ_FLUSH) &&
- !(info->feature_flush & REQ_FLUSH)) ||
+ ((req_op(req) == REQ_OP_FLUSH) &&
+ !info->feature_flush) ||
((req->cmd_flags & REQ_FUA) &&
- !(info->feature_flush & REQ_FUA)));
+ !info->feature_fua));
}
static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
return 0;
}
-static const char *flush_info(unsigned int feature_flush)
+static const char *flush_info(struct blkfront_info *info)
{
- switch (feature_flush & ((REQ_FLUSH | REQ_FUA))) {
- case REQ_FLUSH|REQ_FUA:
+ if (info->feature_flush && info->feature_fua)
return "barrier: enabled;";
- case REQ_FLUSH:
+ else if (info->feature_flush)
return "flush diskcache: enabled;";
- default:
+ else
return "barrier or flush: disabled;";
- }
}
static void xlvbd_flush(struct blkfront_info *info)
{
- blk_queue_write_cache(info->rq, info->feature_flush & REQ_FLUSH,
- info->feature_flush & REQ_FUA);
+ blk_queue_write_cache(info->rq, info->feature_flush ? true : false,
+ info->feature_fua ? true : false);
pr_info("blkfront: %s: %s %s %s %s %s\n",
- info->gd->disk_name, flush_info(info->feature_flush),
+ info->gd->disk_name, flush_info(info),
"persistent grants:", info->feature_persistent ?
"enabled;" : "disabled;", "indirect descriptors:",
info->max_indirect_segments ? "enabled;" : "disabled;");
if (unlikely(error)) {
if (error == -EOPNOTSUPP)
error = 0;
+ info->feature_fua = 0;
info->feature_flush = 0;
xlvbd_flush(info);
}
bio_trim(cloned_bio, offset, size);
cloned_bio->bi_private = split_bio;
cloned_bio->bi_end_io = split_bio_end;
- submit_bio(cloned_bio->bi_rw, cloned_bio);
+ submit_bio(cloned_bio);
}
/*
* Now we have to wait for all those smaller bios to
continue;
}
/* We don't need to split this bio */
- submit_bio(bio->bi_rw, bio);
+ submit_bio(bio);
}
return 0;
/*
* Get the bios in the request so we can re-queue them.
*/
- if (shadow[j].request->cmd_flags &
- (REQ_FLUSH | REQ_FUA | REQ_DISCARD | REQ_SECURE)) {
+ if (req_op(shadow[i].request) == REQ_OP_FLUSH ||
+ req_op(shadow[i].request) == REQ_OP_DISCARD ||
+ shadow[j].request->cmd_flags & (REQ_FUA | REQ_SECURE)) {
+
/*
* Flush operations don't contain bios, so
* we need to requeue the whole request
unsigned int indirect_segments;
info->feature_flush = 0;
+ info->feature_fua = 0;
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-barrier", "%d", &barrier,
*
* If there are barriers, then we use flush.
*/
- if (!err && barrier)
- info->feature_flush = REQ_FLUSH | REQ_FUA;
+ if (!err && barrier) {
+ info->feature_flush = 1;
+ info->feature_fua = 1;
+ }
+
/*
* And if there is "feature-flush-cache" use that above
* barriers.
"feature-flush-cache", "%d", &flush,
NULL);
- if (!err && flush)
- info->feature_flush = REQ_FLUSH;
+ if (!err && flush) {
+ info->feature_flush = 1;
+ info->feature_fua = 0;
+ }
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-discard", "%d", &discard,