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dm: virtio: add debugging information in virtio-blk

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Output debugging message when virtio-blk completes with error.

v1 -> v2:
- fix coding style
- refine debugging message

Tracked-On: #1422
Signed-off-by: Peter Fang <peter.fang@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Peter Fang 2018-10-09 15:50:21 -07:00 committed by Xie, Nanlin
parent 7101ce87a7
commit ba4e72bd0a
1 changed files with 5 additions and 2 deletions
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7
devicemodel/hw/pci/virtio/virtio_block.c
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@ -171,6 +171,9 @@ virtio_blk_done(struct blockif_req *br, int err)
struct virtio_blk_ioreq *io = br->param; struct virtio_blk_ioreq *io = br->param;
struct virtio_blk *blk = io->blk; struct virtio_blk *blk = io->blk;
if (err)
DPRINTF(("virtio_blk: done with error = %d\n\r", err));
/* convert errno into a virtio block error return */ /* convert errno into a virtio block error return */
if (err == EOPNOTSUPP || err == ENOSYS) if (err == EOPNOTSUPP || err == ENOSYS)
*io->status = VIRTIO_BLK_S_UNSUPP; *io->status = VIRTIO_BLK_S_UNSUPP;
@ -245,7 +248,7 @@ virtio_blk_proc(struct virtio_blk *blk, struct virtio_vq_info *vq)
} }
io->req.resid = iolen; io->req.resid = iolen;
DPRINTF(("virtio-block: %s op, %zd bytes, %d segs, offset %ld\n\r", DPRINTF(("virtio_blk: %s op, %zd bytes, %d segs, offset %ld\n\r",
writeop ? "write" : "read/ident", iolen, i - 1, writeop ? "write" : "read/ident", iolen, i - 1,
io->req.offset)); io->req.offset));
@ -309,7 +312,7 @@ virtio_blk_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
int rc; int rc;
if (opts == NULL) { if (opts == NULL) {
printf("virtio-block: backing device required\n"); printf("virtio_blk: backing device required\n");
return -1; return -1;
} }