rocker: add new rocker switch device

Rocker is a simulated ethernet switch device.  The device supports up to 62
front-panel ports and supports L2 switching and L3 routing functions, as well
as L2/L3/L4 ACLs.  The device presents a single PCI device for each switch,
with a memory-mapped register space for device driver access.

Rocker device is invoked with -device, for example a 4-port switch:

  -device rocker,name=sw1,len-ports=4,ports[0]=dev0,ports[1]=dev1, \
         ports[2]=dev2,ports[3]=dev3

Each port is a netdev and can be paired with using -netdev id=<port name>.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David Ahern <dsahern@gmail.com>
Message-id: 1426306173-24884-7-git-send-email-sfeldma@gmail.com

rocker: fix clang compiler errors

Consolidate all forward typedef declarations to rocker.h.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>

rocker: add support for flow modification

We had support for flow add/del.  This adds support for flow mod.  I needed
this for L3 support where an existing route is modified using NLM_F_REPLACE.
For example:

  ip route add 12.0.0.0/30 nexthop via 11.0.0.1 dev swp1
  ip route change 12.0.0.0/30 nexthop via 11.0.0.9 dev swp2

The first cmd adds the route.  The second cmd changes the existing route by
changing its nexthop info.

In the device, a mod operation results in the matching flow enty being modified
with the new settings.  This is atomic to the device.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/hw/net/rocker/rocker.h b/hw/net/rocker/rocker.h
new file mode 100644
index 0000000000..6ae74fff80
--- /dev/null
+++ b/hw/net/rocker/rocker.h
@@ -0,0 +1,75 @@
+/*
+ * QEMU rocker switch emulation
+ *
+ * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
+ * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2014 Neil Horman <nhorman@tuxdriver.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _ROCKER_H_
+#define _ROCKER_H_
+
+#include "qemu/sockets.h"
+
+#if defined(DEBUG_ROCKER)
+#  define DPRINTF(fmt, ...) \
+    do { fprintf(stderr, "ROCKER: " fmt, ## __VA_ARGS__); } while (0)
+#else
+static inline GCC_FMT_ATTR(1, 2) int DPRINTF(const char *fmt, ...)
+{
+    return 0;
+}
+#endif
+
+#define __le16 uint16_t
+#define __le32 uint32_t
+#define __le64 uint64_t
+
+#define __be16 uint16_t
+#define __be32 uint32_t
+#define __be64 uint64_t
+
+static inline bool ipv4_addr_is_multicast(__be32 addr)
+{
+    return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
+}
+
+typedef struct ipv6_addr {
+    union {
+        uint8_t addr8[16];
+        __be16 addr16[8];
+        __be32 addr32[4];
+    };
+} Ipv6Addr;
+
+static inline bool ipv6_addr_is_multicast(const Ipv6Addr *addr)
+{
+    return (addr->addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
+}
+
+typedef struct rocker Rocker;
+typedef struct world World;
+typedef struct desc_info DescInfo;
+typedef struct desc_ring DescRing;
+
+Rocker *rocker_find(const char *name);
+uint32_t rocker_fp_ports(Rocker *r);
+int rocker_event_link_changed(Rocker *r, uint32_t pport, bool link_up);
+int rocker_event_mac_vlan_seen(Rocker *r, uint32_t pport, uint8_t *addr,
+                               uint16_t vlan_id);
+int rx_produce(World *world, uint32_t pport,
+               const struct iovec *iov, int iovcnt);
+int rocker_port_eg(Rocker *r, uint32_t pport,
+                   const struct iovec *iov, int iovcnt);
+
+#endif /* _ROCKER_H_ */