diff options
| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-10-12 18:12:36 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-11-18 19:27:59 +0100 |
| commit | 97e36834f5a106459ab1b290e663a4eb6264639e (patch) | |
| tree | 39e4843998cb7f75b94d80f27e4b11ffb3662f28 /drivers/block/xen-blkback/blkback.c | |
| parent | Linux 3.2-rc2 (diff) | |
| download | linux-97e36834f5a106459ab1b290e663a4eb6264639e.tar.xz linux-97e36834f5a106459ab1b290e663a4eb6264639e.zip | |
xen/blk[front|back]: Squash blkif_request_rw and blkif_request_discard together
In a union type structure to deal with the overlapping
attributes in a easier manner.
Suggested-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block/xen-blkback/blkback.c')
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 15ec4db194d1..d7104abc8b72 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -362,7 +362,7 @@ static int xen_blkbk_map(struct blkif_request *req, { struct gnttab_map_grant_ref map[BLKIF_MAX_SEGMENTS_PER_REQUEST]; int i; - int nseg = req->nr_segments; + int nseg = req->u.rw.nr_segments; int ret = 0; /* @@ -449,7 +449,7 @@ static void xen_blk_discard(struct xen_blkif *blkif, struct blkif_request *req) } else if (err) status = BLKIF_RSP_ERROR; - make_response(blkif, req->id, req->operation, status); + make_response(blkif, req->u.discard.id, req->operation, status); } static void xen_blk_drain_io(struct xen_blkif *blkif) @@ -644,7 +644,8 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, } /* Check that the number of segments is sane. */ - nseg = req->nr_segments; + nseg = req->u.rw.nr_segments; + if (unlikely(nseg == 0 && operation != WRITE_FLUSH && operation != REQ_DISCARD) || unlikely(nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) { @@ -654,12 +655,12 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, goto fail_response; } - preq.dev = req->handle; + preq.dev = req->u.rw.handle; preq.sector_number = req->u.rw.sector_number; preq.nr_sects = 0; pending_req->blkif = blkif; - pending_req->id = req->id; + pending_req->id = req->u.rw.id; pending_req->operation = req->operation; pending_req->status = BLKIF_RSP_OKAY; pending_req->nr_pages = nseg; @@ -784,7 +785,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, xen_blkbk_unmap(pending_req); fail_response: /* Haven't submitted any bio's yet. */ - make_response(blkif, req->id, req->operation, BLKIF_RSP_ERROR); + make_response(blkif, req->u.rw.id, req->operation, BLKIF_RSP_ERROR); free_req(pending_req); msleep(1); /* back off a bit */ return -EIO; |