[Xen-devel] [patch 3/6] xenblk: Add O_DIRECT and O_SYNC support -- frontend.

[Joe Jin <joe.jin@xxxxxxxxxx>]

[patch 3/6] xenblk: Add O_DIRECT and O_SYNC support -- frontend.

If requests submited with REQ_RW_SYNC flag, pass the flag to backend.

Signed-off-by: Joe Jin <joe.jin@xxxxxxxxxx>
---

diff -r 2fb13b8cbe13 drivers/xen/blkfront/blkfront.c
--- a/drivers/xen/blkfront/blkfront.c   Thu Oct 30 13:34:43 2008 +0000
+++ b/drivers/xen/blkfront/blkfront.c   Mon Nov 03 10:31:41 2008 +0800
@@ -621,6 +621,8 @@
                BLKIF_OP_WRITE : BLKIF_OP_READ;
        if (blk_barrier_rq(req))
                ring_req->operation = BLKIF_OP_WRITE_BARRIER;
+       if (blk_rw_sync_rq(req))
+               set_rw_sync(ring_req);
 
        ring_req->nr_segments = 0;
        rq_for_each_bio (bio, req) {
@@ -745,7 +747,7 @@
                ADD_ID_TO_FREELIST(info, id);
 
                uptodate = (bret->status == BLKIF_RSP_OKAY);
-               switch (bret->operation) {
+               switch (BLKIF_OP(bret->operation)) {
                case BLKIF_OP_WRITE_BARRIER:
                        if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
                                printk("blkfront: %s: write barrier op 
failed\n",





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