minios: Support net/block backend in domU
Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
diff -r 3c4ba66c097f extras/mini-os/blkfront.c
--- a/extras/mini-os/blkfront.c Tue Feb 05 17:02:20 2008 +0000
+++ b/extras/mini-os/blkfront.c Wed Feb 06 16:05:11 2008 +0000
@@ -39,6 +39,8 @@ struct blk_buffer {
};
struct blkfront_dev {
+ domid_t dom;
+
struct blkif_front_ring ring;
grant_ref_t ring_ref;
evtchn_port_t evtchn, local_port;
@@ -95,6 +97,15 @@ struct blkfront_dev *init_blkfront(char
dev = malloc(sizeof(*dev));
dev->nodename = strdup(nodename);
+ evtchn_alloc_unbound_t op;
+ op.dom = DOMID_SELF;
+ snprintf(path, sizeof(path), "%s/backend-id", nodename);
+ dev->dom = op.remote_dom = xenbus_read_integer(path);
+ HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound, &op);
+ clear_evtchn(op.port); /* Without, handler gets invoked now! */
+ dev->local_port = bind_evtchn(op.port, blkfront_handler, dev);
+ dev->evtchn=op.port;
+
s = (struct blkif_sring*) alloc_page();
memset(s,0,PAGE_SIZE);
@@ -102,16 +113,7 @@ struct blkfront_dev *init_blkfront(char
SHARED_RING_INIT(s);
FRONT_RING_INIT(&dev->ring, s, PAGE_SIZE);
- dev->ring_ref = gnttab_grant_access(0,virt_to_mfn(s),0);
-
- evtchn_alloc_unbound_t op;
- op.dom = DOMID_SELF;
- snprintf(path, sizeof(path), "%s/backend-id", nodename);
- op.remote_dom = xenbus_read_integer(path);
- HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound, &op);
- clear_evtchn(op.port); /* Without, handler gets invoked now! */
- dev->local_port = bind_evtchn(op.port, blkfront_handler, dev);
- dev->evtchn=op.port;
+ dev->ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(s),0);
// FIXME: proper frees on failures
again:
@@ -294,7 +296,7 @@ void blkfront_aio(struct blkfront_aiocb
barrier();
}
aiocbp->gref[j] = req->seg[j].gref =
- gnttab_grant_access(0, virtual_to_mfn(data), write);
+ gnttab_grant_access(dev->dom, virtual_to_mfn(data), write);
req->seg[j].first_sect = 0;
req->seg[j].last_sect = PAGE_SIZE / dev->sector_size - 1;
}
diff -r 3c4ba66c097f extras/mini-os/netfront.c
--- a/extras/mini-os/netfront.c Tue Feb 05 17:02:20 2008 +0000
+++ b/extras/mini-os/netfront.c Wed Feb 06 16:05:11 2008 +0000
@@ -36,6 +36,8 @@ struct net_buffer {
};
struct netfront_dev {
+ domid_t dom;
+
unsigned short tx_freelist[NET_TX_RING_SIZE];
struct semaphore tx_sem;
@@ -163,7 +165,7 @@ moretodo:
/* We are sure to have free gnttab entries since they got released
above */
buf->gref = req->gref =
- gnttab_grant_access(0,virt_to_mfn(page),0);
+ gnttab_grant_access(dev->dom,virt_to_mfn(page),0);
req->id = id;
}
@@ -296,24 +298,10 @@ struct netfront_dev *init_netfront(char
dev->rx_buffers[i].page = (char*)alloc_page();
}
- txs = (struct netif_tx_sring*) alloc_page();
- rxs = (struct netif_rx_sring *) alloc_page();
- memset(txs,0,PAGE_SIZE);
- memset(rxs,0,PAGE_SIZE);
-
-
- SHARED_RING_INIT(txs);
- SHARED_RING_INIT(rxs);
- FRONT_RING_INIT(&dev->tx, txs, PAGE_SIZE);
- FRONT_RING_INIT(&dev->rx, rxs, PAGE_SIZE);
-
- dev->tx_ring_ref = gnttab_grant_access(0,virt_to_mfn(txs),0);
- dev->rx_ring_ref = gnttab_grant_access(0,virt_to_mfn(rxs),0);
-
evtchn_alloc_unbound_t op;
op.dom = DOMID_SELF;
snprintf(path, sizeof(path), "%s/backend-id", nodename);
- op.remote_dom = xenbus_read_integer(path);
+ dev->dom = op.remote_dom = xenbus_read_integer(path);
HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound, &op);
clear_evtchn(op.port); /* Without, handler gets invoked now! */
#ifdef HAVE_LIBC
@@ -323,6 +311,20 @@ struct netfront_dev *init_netfront(char
#endif
dev->local_port = bind_evtchn(op.port, netfront_handler, dev);
dev->evtchn=op.port;
+
+ txs = (struct netif_tx_sring*) alloc_page();
+ rxs = (struct netif_rx_sring *) alloc_page();
+ memset(txs,0,PAGE_SIZE);
+ memset(rxs,0,PAGE_SIZE);
+
+
+ SHARED_RING_INIT(txs);
+ SHARED_RING_INIT(rxs);
+ FRONT_RING_INIT(&dev->tx, txs, PAGE_SIZE);
+ FRONT_RING_INIT(&dev->rx, rxs, PAGE_SIZE);
+
+ dev->tx_ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(txs),0);
+ dev->rx_ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(rxs),0);
dev->netif_rx = thenetif_rx;
@@ -476,7 +478,7 @@ void init_rx_buffers(struct netfront_dev
req = RING_GET_REQUEST(&dev->rx, requeue_idx);
buf->gref = req->gref =
- gnttab_grant_access(0,virt_to_mfn(buf->page),0);
+ gnttab_grant_access(dev->dom,virt_to_mfn(buf->page),0);
req->id = requeue_idx;
@@ -521,7 +523,7 @@ void netfront_xmit(struct netfront_dev *
memcpy(page,data,len);
buf->gref =
- tx->gref = gnttab_grant_access(0,virt_to_mfn(page),0);
+ tx->gref = gnttab_grant_access(dev->dom,virt_to_mfn(page),1);
tx->offset=0;
tx->size = len;
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