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virtio-9p: fix any_layout 

virtio pci allows any device to have a modern interface,
this in turn requires ANY_LAYOUT support.
Fix up ANY_LAYOUT for virtio-9p.

Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2015-07-23 20:57:53 +03:00
parent 7882080388
commit cd4bfbb20d
1 changed files with 17 additions and 6 deletions
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23
hw/9pfs/virtio-9p.c
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@ -14,6 +14,7 @@
#include "hw/virtio/virtio.h"
#include "hw/i386/pc.h"
#include "qemu/error-report.h"
#include "qemu/iov.h"
#include "qemu/sockets.h"
#include "virtio-9p.h"
#include "fsdev/qemu-fsdev.h"
@ -3261,16 +3262,26 @@ void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
while ((pdu = alloc_pdu(s)) &&
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
uint8_t *ptr;
struct {
uint32_t size_le;
uint8_t id;
uint16_t tag_le;
} QEMU_PACKED out;
int len;
pdu->s = s;
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
QEMU_BUILD_BUG_ON(sizeof out != 7);
ptr = pdu->elem.out_sg[0].iov_base;
len = iov_to_buf(pdu->elem.out_sg, pdu->elem.out_num, 0,
&out, sizeof out);
BUG_ON(len != sizeof out);
pdu->size = le32_to_cpu(out.size_le);
pdu->id = out.id;
pdu->tag = le16_to_cpu(out.tag_le);
pdu->size = le32_to_cpu(*(uint32_t *)ptr);
pdu->id = ptr[4];
pdu->tag = le16_to_cpu(*(uint16_t *)(ptr + 5));
qemu_co_queue_init(&pdu->complete);
submit_pdu(s, pdu);
}