diff options
| author | Ben Pfaff <blp@nicira.com> | 2012-05-04 14:52:36 -0700 |
|---|---|---|
| committer | Ben Pfaff <blp@nicira.com> | 2012-05-09 13:28:38 -0700 |
| commit | f586278a4668786e4cea3dd0184059da2e948eb9 (patch) | |
| tree | ebdac2bf66d09e35919edc243cd1d7fcacc958e2 /tests | |
| parent | ac5b53f6b7531257ada83e9c61e4a3dd2fd9f2a4 (diff) | |
ofproto-dpif: Introduce "slow path" datapath flows.
Most exact-match flows can be handled directly in the datapath, but
for various reasons, some cannot: every packet in these flows must
be sent separately to userspace. Until now, flows that cannot be
handled entirely in the kernel have been allowed to miss each time
in the datapath. This is generally OK, but it has a few
disadvantages:
* It can make troubleshooting at the level where one must look
at datapath flows a bit confusing in some cases, because
datapath misses due to genuinely new flows are mixed in with
datapath misses for known flows that cannot be set up.
* It means that the kernel-to-userspace packets for a given
input port always go to a single kernel-to-userspace queue,
even if we'd like to segregate out some of the packets for
known flows. (An upcoming commit has examples.)
This commit therefore introduces the concept of a "slow path" flow,
one that is installed in the datapath with a single action that
sends the flow's packets to userspace. To make troubleshooting
easier, the action includes a reason code (displayed by "ovs-dpctl
dump-flows") that explains why the flow has been slow-pathed.
Bug #7550.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/ofproto-dpif.at | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tests/ofproto-dpif.at b/tests/ofproto-dpif.at index 17b064d5..9c3e0dc9 100644 --- a/tests/ofproto-dpif.at +++ b/tests/ofproto-dpif.at @@ -78,9 +78,10 @@ table=1 in_port=1 action=dec_ttl,output:3 ]) AT_CHECK([ovs-ofctl add-flows br0 flows.txt]) AT_CHECK([ovs-appctl ofproto/trace br0 'in_port(1),eth(src=50:54:00:00:00:05,dst=50:54:00:00:00:07),eth_type(0x0800),ipv4(src=192.168.0.1,dst=192.168.0.2,proto=1,tos=0,ttl=2,frag=no)' -generate], [0], [stdout]) -AT_CHECK([tail -2 stdout], [0], +AT_CHECK([tail -3 stdout], [0], [Datapath actions: set(ipv4(src=192.168.0.1,dst=192.168.0.2,proto=1,tos=0,ttl=1,frag=no)),2,4 -This flow is not cachable. +This flow is handled by the userspace slow path because it: + - Sends "packet-in" messages to the OpenFlow controller. ]) AT_CHECK([ovs-appctl ofproto/trace br0 'in_port(1),eth(src=50:54:00:00:00:05,dst=50:54:00:00:00:07),eth_type(0x0800),ipv4(src=192.168.0.1,dst=192.168.0.2,proto=1,tos=0,ttl=3,frag=no)'], [0], [stdout]) AT_CHECK([tail -1 stdout], [0], |