odp-util: Always export the priority and skb_mark netlink attributes.

The current Netlink protocol allows a default value of zero if either mark
or priority is not specified (this is part of the ABI).  Until now, when
userspace serializes either the value or mask, it looked at the value and
omitted the netlink attribute if it is zero.  This is a bug because an
exact match on zero turns into a wildcard of the field.

These two fields (plus input port and EtherType) are special because they
can be omitted whereas most other values are required to be fully
specified.  These protocol variations tend to cause bugs (as above) when we
evolve the protocol because an exception that makes sense in one context
might not be logical in another.  Since the default value for mark and
priority are merely shorthands, we can push the protocol in a more
consistent direction by ignoring the shortcut and always serializing the
values.  This is what this commits does.

Signed-off-by: Andy Zhou <azhou@nicira.com>
[blp@nicira.com added Jesse's text to the commit message]
Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/lib/odp-util.c b/lib/odp-util.c
index e29d3af..dcd4b6f 100644 (file)
--- a/lib/odp-util.c
+++ b/lib/odp-util.c
@@ -2329,17 +2329,13 @@ odp_flow_key_from_flow__(struct ofpbuf *buf, const struct flow *data,
      * treat 'data' as a mask. */
     is_mask = (data != flow);
 
-    if (flow->skb_priority) {
-        nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, data->skb_priority);
-    }
+    nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, data->skb_priority);
 
     if (flow->tunnel.ip_dst || is_mask) {
         tun_key_to_attr(buf, &data->tunnel);
     }
 
-    if (flow->skb_mark) {
-        nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, data->skb_mark);
-    }
+    nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, data->skb_mark);
 
     /* Add an ingress port attribute if this is a mask or 'odp_in_port'
      * is not the magical value "OVSP_NONE". */

diff --git a/tests/odp.at b/tests/odp.at
index 5776b95..ffd90a0 100644 (file)
--- a/tests/odp.at
+++ b/tests/odp.at
@@ -24,7 +24,7 @@ in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x86dd),ipv
 in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x86dd),ipv6(src=::1,dst=::2,label=0,proto=58,tclass=0,hlimit=128,frag=no),icmpv6(type=136,code=0),nd(target=::3,tll=00:0a:0b:0c:0d:0e)
 in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x86dd),ipv6(src=::1,dst=::2,label=0,proto=58,tclass=0,hlimit=128,frag=no),icmpv6(type=136,code=0),nd(target=::3,sll=00:05:06:07:08:09,tll=00:0a:0b:0c:0d:0e)
 in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x0806),arp(sip=1.2.3.4,tip=5.6.7.8,op=1,sha=00:0f:10:11:12:13,tha=00:14:15:16:17:18)
-skb_mark(0x1234),in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x86dd),ipv6(src=::1,dst=::2,label=0,proto=58,tclass=0,hlimit=128,frag=no),icmpv6(type=136,code=0),nd(target=::3,sll=00:05:06:07:08:09,tll=00:0a:0b:0c:0d:0e)
+in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x86dd),ipv6(src=::1,dst=::2,label=0,proto=58,tclass=0,hlimit=128,frag=no),icmpv6(type=136,code=0),nd(target=::3,sll=00:05:06:07:08:09,tll=00:0a:0b:0c:0d:0e)
 in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x8847),mpls(label=100,tc=3,ttl=64,bos=1)
 in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x8847),mpls(label=100,tc=7,ttl=100,bos=1)
 in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x8847),mpls(label=100,tc=7,ttl=100,bos=0)
@@ -33,48 +33,53 @@ in_port(1),eth(src=00:01:02:03:04:05,dst=10:11:12:13:14:15),eth_type(0x8848),mpl
 ])
 
 (echo '# Valid forms without tun_id or VLAN header.'
- cat odp-base.txt
+ set 's/^/skb_priority(0),skb_mark(0),/' odp-base.txt
+
+ set '
+s/^/skb_priority(0),skb_mark(0),/
+' odp-base.txt
+
 
  echo
  echo '# Valid forms with tunnel header.'
- sed 's/^/tunnel(tun_id=0x7f10354,src=10.10.10.10,dst=20.20.20.20,tos=0x0,ttl=64,flags(csum,key)),/' odp-base.txt
+ sed 's/^/skb_priority(0),tunnel(tun_id=0x7f10354,src=10.10.10.10,dst=20.20.20.20,tos=0x0,ttl=64,flags(csum,key)),skb_mark(0x1234),/' odp-base.txt
 
  echo
  echo '# Valid forms with VLAN header.'
- sed 's/\(eth([[^)]]*)\),*/\1,eth_type(0x8100),vlan(vid=99,pcp=7),encap(/
+ sed 's/^/skb_priority(0),skb_mark(0),/
+s/\(eth([[^)]]*)\),*/\1,eth_type(0x8100),vlan(vid=99,pcp=7),encap(/
 s/$/)/' odp-base.txt
 
  echo
  echo '# Valid forms with MPLS header.'
- sed 's/\(eth([[^)]]*),?\)/\1,eth_type(0x8847),mpls(label=100,tc=7,ttl=64,bos=1)/' odp-base.txt
+ sed 's/^/skb_priority(0),skb_mark(0),/
+s/\(eth([[^)]]*),?\)/\1,eth_type(0x8847),mpls(label=100,tc=7,ttl=64,bos=1)/' odp-base.txt
 
  echo
  echo '# Valid forms with MPLS multicast header.'
- sed 's/\(eth([[^)]]*),?\)/\1,eth_type(0x8848),mpls(label=100,tc=7,ttl=64,bos=1)/' odp-base.txt
-
- echo
- echo '# Valid forms with QoS priority.'
- sed 's/^/skb_priority(0x1234),/' odp-base.txt
+ sed 's/^/skb_priority(0),skb_mark(0),/
+s/\(eth([[^)]]*),?\)/\1,eth_type(0x8848),mpls(label=100,tc=7,ttl=64,bos=1)/' odp-base.txt
 
  echo
  echo '# Valid forms with tunnel and VLAN headers.'
- sed 's/^/tunnel(tun_id=0xfedcba9876543210,src=10.0.0.1,dst=10.0.0.2,tos=0x8,ttl=128,flags(key)),/
+ sed 's/^/skb_priority(0),tunnel(tun_id=0xfedcba9876543210,src=10.0.0.1,dst=10.0.0.2,tos=0x8,ttl=128,flags(key)),skb_mark(0),/
 s/\(eth([[^)]]*)\),*/\1,eth_type(0x8100),vlan(vid=99,pcp=7),encap(/
 s/$/)/' odp-base.txt
 
  echo
  echo '# Valid forms with QOS priority, tunnel, and VLAN headers.'
- sed 's/^/skb_priority(0x1234),tunnel(tun_id=0xfedcba9876543210,src=10.10.10.10,dst=20.20.20.20,tos=0x8,ttl=64,flags(key)),/
+ sed 's/^/skb_priority(0x1234),tunnel(tun_id=0xfedcba9876543210,src=10.10.10.10,dst=20.20.20.20,tos=0x8,ttl=64,flags(key)),skb_mark(0),/
 s/\(eth([[^)]]*)\),*/\1,eth_type(0x8100),vlan(vid=99,pcp=7),encap(/
 s/$/)/' odp-base.txt
 
  echo
  echo '# Valid forms with IP first fragment.'
-sed -n 's/,frag=no),/,frag=first),/p' odp-base.txt
+sed 's/^/skb_priority(0),skb_mark(0),/' odp-base.txt | sed -n 's/,frag=no),/,frag=first),/p'
 
  echo
  echo '# Valid forms with IP later fragment.'
-sed -n 's/,frag=no),.*/,frag=later)/p' odp-base.txt) > odp.txt
+sed 's/^/skb_priority(0),skb_mark(0),/' odp-base.txt | sed -n 's/,frag=no),.*/,frag=later)/p'
+) > odp.txt
 AT_CAPTURE_FILE([odp.txt])
 AT_CHECK_UNQUOTED([test-odp parse-keys < odp.txt], [0], [`cat odp.txt`
 ])

diff --git a/tests/ofproto-dpif.at b/tests/ofproto-dpif.at
index 9c51f42..7dd2073 100644 (file)
--- a/tests/ofproto-dpif.at
+++ b/tests/ofproto-dpif.at
@@ -1816,12 +1816,12 @@ AT_CHECK([ovs-appctl netdev-dummy/receive p3 'in_port(3),eth(src=50:54:00:00:00:
 ])
 
 AT_CHECK([ovs-appctl dpif/dump-flows br0 | sort | STRIP_USED], [0], [dnl
-in_port(1),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
-in_port(2),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=0/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(1),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(2),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=0/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
 ])
 
 AT_CHECK([ovs-appctl dpif/dump-flows br1 | sort | STRIP_USED], [0], [dnl
-in_port(3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
 ])
 
 OVS_VSWITCHD_STOP
@@ -1841,12 +1841,12 @@ AT_CHECK([ovs-appctl netdev-dummy/receive p3 'in_port(3),eth(src=50:54:00:00:00:
 ])
 
 AT_CHECK([ovs-appctl dpif/dump-flows br0 | sort | STRIP_USED], [0], [dnl
-in_port(1),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
-in_port(2),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=0/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(1),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(2),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=0/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
 ])
 
 AT_CHECK([ovs-appctl dpif/dump-flows br1 | sort | STRIP_USED], [0], [dnl
-in_port(3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
 ])
 
 AT_CHECK([ovs-appctl dpif/del-flows br0])
@@ -1854,7 +1854,7 @@ AT_CHECK([ovs-appctl dpif/dump-flows br0 | sort | STRIP_USED], [0], [dnl
 ])
 
 AT_CHECK([ovs-appctl dpif/dump-flows br1 | sort | STRIP_USED], [0], [dnl
-in_port(3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:0, bytes:0, used:0.0s, actions:userspace(pid=0,slow_path(controller))
 ])
 
 OVS_VSWITCHD_STOP
@@ -1902,10 +1902,10 @@ br1 (dummy@ovs-dummy):
 ])
 
 AT_CHECK([ovs-appctl dpif/dump-flows br0 | STRIP_USED], [0], [dnl
-in_port(100),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:9, bytes:540, used:0.0s, actions:101,3,2
+skb_priority(0),skb_mark(0/0),in_port(100),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:9, bytes:540, used:0.0s, actions:101,3,2
 ]),
 AT_CHECK([ovs-appctl dpif/dump-flows br1 | STRIP_USED], [0], [dnl
-in_port(101),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:4, bytes:240, used:0.0s, actions:100,2,3
+skb_priority(0),skb_mark(0/0),in_port(101),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0), packets:4, bytes:240, used:0.0s, actions:100,2,3
 ])
 
 AT_CHECK([ovs-ofctl dump-ports br0 pbr0], [0], [dnl