On 04/15/2016 05:50 AM, Juergen Gross wrote:
On 15/04/16 12:40, mchristi@redhat.com wrote:
quoted
From: Mike Christie <redacted>
The last patch added a REQ_OP_FLUSH for request_fn drivers
and the next patch renames REQ_FLUSH to REQ_PREFLUSH which
will be used by file systems and make_request_fn drivers so
they can send a write/flush combo.
This patch drops xen's use of REQ_FLUSH to track if it supports
REQ_OP_FLUSH requests, so REQ_FLUSH can be deleted.
v6:
- Dropped parts of patch handled by Jens's QUEUE_FLAG_WC/FUA
patches and modified patch to check feature_flush/fua bits.
Signed-off-by: Mike Christie <redacted>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
drivers/block/xen-blkfront.c | 47 ++++++++++++++++++++++----------------------
1 file changed, 24 insertions(+), 23 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index f01691a..d6429e7 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
...
quoted
@@ -985,24 +981,22 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size,
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_fua)
Shouldn't this test feature_flush?
quoted
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_flush ? true : false);
And here the second test should be feature_fua?
You are right. Will fix up and resend.