netlink-socket: Reduce nl_sock_recv() from 2 (or more) system calls to 1.

[sliver-openvswitch.git] / lib / lacp.h

diff --git a/lib/lacp.h b/lib/lacp.h
index c5f3c2f..0fb797e 100644 (file)
--- a/lib/lacp.h
+++ b/lib/lacp.h
@@ -21,28 +21,104 @@
 #include <stdint.h>
 #include "packets.h"
 
-/* Function called when a LACP PDU is ready to be sent out the given slave */
-typedef void lacp_send_pdu(void *slave, const struct lacp_pdu *);
+/* Masks for lacp_info state member. */
+#define LACP_STATE_ACT  0x01 /* Activity. Active or passive? */
+#define LACP_STATE_TIME 0x02 /* Timeout. Short or long timeout? */
+#define LACP_STATE_AGG  0x04 /* Aggregation. Is the link is bondable? */
+#define LACP_STATE_SYNC 0x08 /* Synchronization. Is the link in up to date? */
+#define LACP_STATE_COL  0x10 /* Collecting. Is the link receiving frames? */
+#define LACP_STATE_DIST 0x20 /* Distributing. Is the link sending frames? */
+#define LACP_STATE_DEF  0x40 /* Defaulted. Using default partner info? */
+#define LACP_STATE_EXP  0x80 /* Expired. Using expired partner info? */
+
+#define LACP_FAST_TIME_TX 1000  /* Fast transmission rate. */
+#define LACP_SLOW_TIME_TX 30000 /* Slow transmission rate. */
+#define LACP_RX_MULTIPLIER 3    /* Multiply by TX rate to get RX rate. */
+
+#define LACP_INFO_LEN 15
+struct lacp_info {
+    ovs_be16 sys_priority;            /* System priority. */
+    uint8_t sys_id[ETH_ADDR_LEN];     /* System ID. */
+    ovs_be16 key;                     /* Operational key. */
+    ovs_be16 port_priority;           /* Port priority. */
+    ovs_be16 port_id;                 /* Port ID. */
+    uint8_t state;                    /* State mask.  See LACP_STATE macros. */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(LACP_INFO_LEN == sizeof(struct lacp_info));
+
+#define LACP_PDU_LEN 110
+struct lacp_pdu {
+    uint8_t subtype;          /* Always 1. */
+    uint8_t version;          /* Always 1. */
+
+    uint8_t actor_type;       /* Always 1. */
+    uint8_t actor_len;        /* Always 20. */
+    struct lacp_info actor;   /* LACP actor information. */
+    uint8_t z1[3];            /* Reserved.  Always 0. */
+
+    uint8_t partner_type;     /* Always 2. */
+    uint8_t partner_len;      /* Always 20. */
+    struct lacp_info partner; /* LACP partner information. */
+    uint8_t z2[3];            /* Reserved.  Always 0. */
+
+    uint8_t collector_type;   /* Always 3. */
+    uint8_t collector_len;    /* Always 16. */
+    ovs_be16 collector_delay; /* Maximum collector delay. Set to UINT16_MAX. */
+    uint8_t z3[64];           /* Combination of several fields.  Always 0. */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(LACP_PDU_LEN == sizeof(struct lacp_pdu));
+
+void compose_lacp_pdu(const struct lacp_info *actor,
+                      const struct lacp_info *partner, struct lacp_pdu *);
+
+const struct lacp_pdu *parse_lacp_packet(const struct ofpbuf *);
+\f
+/* LACP Protocol Implementation. */
+
+enum lacp_time {
+    LACP_TIME_FAST,
+    LACP_TIME_SLOW,
+    LACP_TIME_CUSTOM
+};
+
+struct lacp_settings {
+    char *name;
+    uint8_t id[ETH_ADDR_LEN];
+    uint16_t priority;
+    bool active;
+    enum lacp_time lacp_time;
+    long long int custom_time;
+    bool heartbeat;
+};
 
 void lacp_init(void);
 struct lacp *lacp_create(void);
 void lacp_destroy(struct lacp *);
 
-void lacp_configure(struct lacp *, const char *name,
-                    const uint8_t sys_id[ETH_ADDR_LEN],
-                    uint16_t sys_priority, bool active, bool fast);
+void lacp_configure(struct lacp *, const struct lacp_settings *);
 bool lacp_is_active(const struct lacp *);
 
 void lacp_process_pdu(struct lacp *, const void *slave,
                       const struct lacp_pdu *);
 bool lacp_negotiated(const struct lacp *);
 
-void lacp_slave_register(struct lacp *, void *slave_, const char *name,
-                         uint16_t port_id, uint16_t port_priority);
+struct lacp_slave_settings {
+    char *name;
+    uint16_t id;
+    uint16_t priority;
+    uint16_t key;
+};
+
+void lacp_slave_register(struct lacp *, void *slave_,
+                         const struct lacp_slave_settings *);
 void lacp_slave_unregister(struct lacp *, const void *slave);
-void lacp_slave_enable(struct lacp *lacp, void *slave_, bool enabled);
 void lacp_slave_carrier_changed(const struct lacp *, const void *slave);
 bool lacp_slave_may_enable(const struct lacp *, const void *slave);
+uint16_t lacp_slave_get_port_id(const struct lacp *, const void *slave);
+bool lacp_slave_is_current(const struct lacp *, const void *slave_);
+
+/* Callback function for lacp_run() for sending a LACP PDU. */
+typedef void lacp_send_pdu(void *slave, const struct lacp_pdu *);
 
 void lacp_run(struct lacp *, lacp_send_pdu *);
 void lacp_wait(struct lacp *);