X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fodp-util.h;h=16f2b156707260c6e720b2c23530d2dda609e888;hb=31a1e58ec7236b915cd9b49d9e927ad90b5ae285;hp=0f4f9e6b7130ee5b4dd3556258dd1b9dfe4e19cf;hpb=a61680c6d15fa1f1ae3072a83c0e3d7ed08f6048;p=openvswitch diff --git a/lib/odp-util.h b/lib/odp-util.h index 0f4f9e6b..16f2b156 100644 --- a/lib/odp-util.h +++ b/lib/odp-util.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009, 2010, 2011 Nicira Networks. + * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -30,8 +30,9 @@ struct ds; struct flow; struct nlattr; struct ofpbuf; +struct simap; -#define OVSP_NONE ((uint16_t) -1) +#define OVSP_NONE UINT16_MAX static inline uint16_t ofp_port_to_odp_port(uint16_t ofp_port) @@ -58,11 +59,22 @@ odp_port_to_ofp_port(uint16_t odp_port) return odp_port; } } + void format_odp_actions(struct ds *, const struct nlattr *odp_actions, size_t actions_len); +int odp_actions_from_string(const char *, const struct simap *port_names, + struct ofpbuf *odp_actions); -/* Upper bound on the length of a nlattr-formatted flow key. The longest - * nlattr-formatted flow key would be: +/* The maximum number of bytes that odp_flow_key_from_flow() appends to a + * buffer. This is the upper bound on the length of a nlattr-formatted flow + * key that ovs-vswitchd fully understands. + * + * OVS doesn't insist that ovs-vswitchd and the datapath have exactly the same + * idea of a flow, so therefore this value isn't necessarily an upper bound on + * the length of a flow key that the datapath can pass to ovs-vswitchd. + * + * The longest nlattr-formatted flow key appended by odp_flow_key_from_flow() + * would be: * * struct pad nl hdr total * ------ --- ------ ----- @@ -70,15 +82,20 @@ void format_odp_actions(struct ds *, const struct nlattr *odp_actions, * OVS_KEY_ATTR_TUN_ID 8 -- 4 12 * OVS_KEY_ATTR_IN_PORT 4 -- 4 8 * OVS_KEY_ATTR_ETHERNET 12 -- 4 16 + * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (outer VLAN ethertype) * OVS_KEY_ATTR_8021Q 4 -- 4 8 - * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 + * OVS_KEY_ATTR_ENCAP 0 -- 4 4 (VLAN encapsulation) + * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (inner VLAN ethertype) * OVS_KEY_ATTR_IPV6 40 -- 4 44 * OVS_KEY_ATTR_ICMPV6 2 2 4 8 * OVS_KEY_ATTR_ND 28 -- 4 32 * ------------------------------------------------- - * total 144 + * total 156 + * + * We include some slack space in case the calculation isn't quite right or we + * add another field and forget to adjust this value. */ -#define ODPUTIL_FLOW_KEY_BYTES 144 +#define ODPUTIL_FLOW_KEY_BYTES 200 /* A buffer with sufficient size and alignment to hold an nlattr-formatted flow * key. An array of "struct nlattr" might not, in theory, be sufficiently @@ -88,27 +105,84 @@ struct odputil_keybuf { }; void odp_flow_key_format(const struct nlattr *, size_t, struct ds *); -int odp_flow_key_from_string(const char *s, struct ofpbuf *); +int odp_flow_key_from_string(const char *s, const struct simap *port_names, + struct ofpbuf *); void odp_flow_key_from_flow(struct ofpbuf *, const struct flow *); -int odp_flow_key_to_flow(const struct nlattr *, size_t, struct flow *); + +uint32_t odp_flow_key_hash(const struct nlattr *, size_t); + +/* How well a kernel-provided flow key (a sequence of OVS_KEY_ATTR_* + * attributes) matches OVS userspace expectations. + * + * These values are arranged so that greater values are "more important" than + * lesser ones. In particular, a single flow key can fit the descriptions for + * both ODP_FIT_TOO_LITTLE and ODP_FIT_TOO_MUCH. Such a key is treated as + * ODP_FIT_TOO_LITTLE. */ +enum odp_key_fitness { + ODP_FIT_PERFECT, /* The key had exactly the fields we expect. */ + ODP_FIT_TOO_MUCH, /* The key had fields we don't understand. */ + ODP_FIT_TOO_LITTLE, /* The key lacked fields we expected to see. */ + ODP_FIT_ERROR, /* The key was invalid. */ +}; +enum odp_key_fitness odp_flow_key_to_flow(const struct nlattr *, size_t, + struct flow *); +const char *odp_key_fitness_to_string(enum odp_key_fitness); + +void commit_odp_actions(const struct flow *, struct flow *base, + struct ofpbuf *odp_actions); + +/* ofproto-dpif interface. + * + * The following types and functions are logically part of ofproto-dpif. + * ofproto-dpif puts values of these types into the flows that it installs in + * the kernel datapath, though, so ovs-dpctl needs to interpret them so that + * it can print flows in a more human-readable manner. */ enum user_action_cookie_type { USER_ACTION_COOKIE_UNSPEC, - USER_ACTION_COOKIE_CONTROLLER, /* Packet for controller. */ USER_ACTION_COOKIE_SFLOW, /* Packet for sFlow sampling. */ + USER_ACTION_COOKIE_SLOW_PATH /* Userspace must process this flow. */ }; /* user_action_cookie is passed as argument to OVS_ACTION_ATTR_USERSPACE. - * Since is it passed to kernel as u64, its size has to be 8 bytes. */ -struct user_action_cookie { - uint8_t type; /* enum user_action_cookie_type. */ - uint8_t n_output; /* No of output ports. used by sflow. */ - ovs_be16 vlan_tci; /* Used by sFlow */ - uint32_t data; /* Data is len for OFPP_CONTROLLER action. - For sFlow it is port_ifindex. */ + * Since it is passed to kernel as u64, its size has to be 8 bytes. */ +union user_action_cookie { + uint16_t type; /* enum user_action_cookie_type. */ + + struct { + uint16_t type; /* USER_ACTION_COOKIE_SFLOW. */ + ovs_be16 vlan_tci; /* Destination VLAN TCI. */ + uint32_t output; /* SFL_FLOW_SAMPLE_TYPE 'output' value. */ + } sflow; + + struct { + uint16_t type; /* USER_ACTION_COOKIE_SLOW_PATH. */ + uint16_t unused; + uint32_t reason; /* enum slow_path_reason. */ + } slow_path; }; +BUILD_ASSERT_DECL(sizeof(union user_action_cookie) == 8); -BUILD_ASSERT_DECL(sizeof(struct user_action_cookie) == 8); +size_t odp_put_userspace_action(uint32_t pid, + const union user_action_cookie *, + struct ofpbuf *odp_actions); + +/* Reasons why a subfacet might not be fast-pathable. */ +enum slow_path_reason { + /* These reasons are mutually exclusive. */ + SLOW_CFM = 1 << 0, /* CFM packets need per-packet processing. */ + SLOW_LACP = 1 << 1, /* LACP packets need per-packet processing. */ + SLOW_STP = 1 << 2, /* STP packets need per-packet processing. */ + SLOW_IN_BAND = 1 << 3, /* In-band control needs every packet. */ + + /* Mutually exclusive with SLOW_CFM, SLOW_LACP, SLOW_STP. + * Could possibly appear with SLOW_IN_BAND. */ + SLOW_CONTROLLER = 1 << 4, /* Packets must go to OpenFlow controller. */ + + /* This can appear on its own, or, theoretically at least, along with any + * other combination of reasons. */ + SLOW_MATCH = 1 << 5, /* Datapath can't match specifically enough. */ +}; #endif /* odp-util.h */