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| author | Ben Pfaff <blp@nicira.com> | 2013-02-15 17:29:22 -0800 |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2013-02-22 16:29:22 -0800 |
| commit | 4490108b4a5ada14c7be712260829faecc814ae5 (patch) | |
| tree | 1a8aa00a6e518cd597b8ffda27f5e357c998a33b /include/linux/openvswitch.h | |
| parent | 14408dba8440ef629a3a2827bc4c7b5045889295 (diff) | |
| download | linux-4490108b4a5ada14c7be712260829faecc814ae5.tar.gz linux-4490108b4a5ada14c7be712260829faecc814ae5.tar.xz | |
openvswitch: Allow OVS_USERSPACE_ATTR_USERDATA to be variable length.
Until now, the optional OVS_USERSPACE_ATTR_USERDATA attribute had to be
exactly 64 bits long, if it was present. However, 64 bits is not enough
space to associate as much information with a flow as would be convenient
for some userspace features now under development. This commit generalizes
the attribute, allowing it to be any length.
This generalization is backward-compatible: if userspace only uses 64-bit
attributes, then it will not see any change in behavior.
CC: Romain Lenglet <rlenglet@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'include/linux/openvswitch.h')
| -rw-r--r-- | include/linux/openvswitch.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/openvswitch.h b/include/linux/openvswitch.h index 99e6414a40d9..67d6c7b03581 100644 --- a/include/linux/openvswitch.h +++ b/include/linux/openvswitch.h @@ -127,7 +127,8 @@ enum ovs_packet_cmd { * for %OVS_PACKET_CMD_EXECUTE. It has nested %OVS_ACTION_ATTR_* attributes. * @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an - * %OVS_USERSPACE_ATTR_USERDATA attribute. + * %OVS_USERSPACE_ATTR_USERDATA attribute, with the same length and content + * specified there. * * These attributes follow the &struct ovs_header within the Generic Netlink * payload for %OVS_PACKET_* commands. @@ -137,7 +138,7 @@ enum ovs_packet_attr { OVS_PACKET_ATTR_PACKET, /* Packet data. */ OVS_PACKET_ATTR_KEY, /* Nested OVS_KEY_ATTR_* attributes. */ OVS_PACKET_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */ - OVS_PACKET_ATTR_USERDATA, /* u64 OVS_ACTION_ATTR_USERSPACE arg. */ + OVS_PACKET_ATTR_USERDATA, /* OVS_ACTION_ATTR_USERSPACE arg. */ __OVS_PACKET_ATTR_MAX }; @@ -389,13 +390,13 @@ enum ovs_sample_attr { * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action. * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION * message should be sent. Required. - * @OVS_USERSPACE_ATTR_USERDATA: If present, its u64 argument is copied to the - * %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA, + * @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is + * copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA. */ enum ovs_userspace_attr { OVS_USERSPACE_ATTR_UNSPEC, OVS_USERSPACE_ATTR_PID, /* u32 Netlink PID to receive upcalls. */ - OVS_USERSPACE_ATTR_USERDATA, /* u64 optional user-specified cookie. */ + OVS_USERSPACE_ATTR_USERDATA, /* Optional user-specified cookie. */ __OVS_USERSPACE_ATTR_MAX }; |