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| author | Reilly Grant <grantr@vmware.com> | 2013-03-14 11:55:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-15 08:26:26 -0400 |
| commit | 2a89f9247ae43a2cf36fbc07b21b5792fc7b9efe (patch) | |
| tree | 869acbbc9e9cf4ae92e7153b387dfccd0a76659e /net/vmw_vsock/vmci_transport.c | |
| parent | 8a7fbfab4be39b8690543f3d29b26860d2f6c576 (diff) | |
| download | lwn-2a89f9247ae43a2cf36fbc07b21b5792fc7b9efe.tar.gz lwn-2a89f9247ae43a2cf36fbc07b21b5792fc7b9efe.zip | |
VSOCK: Support VM sockets connected to the hypervisor.
The resource ID used for VM socket control packets (0) is already
used for the VMCI_GET_CONTEXT_ID hypercall so a new ID (15) must be
used when the guest sends these datagrams to the hypervisor.
The hypervisor context ID must also be removed from the internal
blacklist.
Signed-off-by: Reilly Grant <grantr@vmware.com>
Acked-by: Andy King <acking@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/vmw_vsock/vmci_transport.c')
| -rw-r--r-- | net/vmw_vsock/vmci_transport.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c index a70ace83a153..faf81b8c1a3a 100644 --- a/net/vmw_vsock/vmci_transport.c +++ b/net/vmw_vsock/vmci_transport.c @@ -123,6 +123,14 @@ static s32 vmci_transport_error_to_vsock_error(s32 vmci_error) return err > 0 ? -err : err; } +static u32 vmci_transport_peer_rid(u32 peer_cid) +{ + if (VMADDR_CID_HYPERVISOR == peer_cid) + return VMCI_TRANSPORT_HYPERVISOR_PACKET_RID; + + return VMCI_TRANSPORT_PACKET_RID; +} + static inline void vmci_transport_packet_init(struct vmci_transport_packet *pkt, struct sockaddr_vm *src, @@ -140,7 +148,7 @@ vmci_transport_packet_init(struct vmci_transport_packet *pkt, pkt->dg.src = vmci_make_handle(VMADDR_CID_ANY, VMCI_TRANSPORT_PACKET_RID); pkt->dg.dst = vmci_make_handle(dst->svm_cid, - VMCI_TRANSPORT_PACKET_RID); + vmci_transport_peer_rid(dst->svm_cid)); pkt->dg.payload_size = sizeof(*pkt) - sizeof(pkt->dg); pkt->version = VMCI_TRANSPORT_PACKET_VERSION; pkt->type = type; @@ -511,6 +519,9 @@ static bool vmci_transport_is_trusted(struct vsock_sock *vsock, u32 peer_cid) static bool vmci_transport_allow_dgram(struct vsock_sock *vsock, u32 peer_cid) { + if (VMADDR_CID_HYPERVISOR == peer_cid) + return true; + if (vsock->cached_peer != peer_cid) { vsock->cached_peer = peer_cid; if (!vmci_transport_is_trusted(vsock, peer_cid) && @@ -631,7 +642,6 @@ static int vmci_transport_recv_dgram_cb(void *data, struct vmci_datagram *dg) static bool vmci_transport_stream_allow(u32 cid, u32 port) { static const u32 non_socket_contexts[] = { - VMADDR_CID_HYPERVISOR, VMADDR_CID_RESERVED, }; int i; @@ -670,7 +680,7 @@ static int vmci_transport_recv_stream_cb(void *data, struct vmci_datagram *dg) */ if (!vmci_transport_stream_allow(dg->src.context, -1) - || VMCI_TRANSPORT_PACKET_RID != dg->src.resource) + || vmci_transport_peer_rid(dg->src.context) != dg->src.resource) return VMCI_ERROR_NO_ACCESS; if (VMCI_DG_SIZE(dg) < sizeof(*pkt)) |