--- /dev/null
+/*
+ * include/linux/if_team.h - Network team device driver header
+ * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef _LINUX_IF_TEAM_H_
+#define _LINUX_IF_TEAM_H_
+
+#include <linux/netpoll.h>
+#include <net/sch_generic.h>
+#include <linux/types.h>
+#include <uapi/linux/if_team.h>
+
+struct team_pcpu_stats {
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 rx_multicast;
+ u64 tx_packets;
+ u64 tx_bytes;
+ struct u64_stats_sync syncp;
+ u32 rx_dropped;
+ u32 tx_dropped;
+};
+
+struct team;
+
+struct team_port {
+ struct net_device *dev;
+ struct hlist_node hlist; /* node in enabled ports hash list */
+ struct list_head list; /* node in ordinary list */
+ struct team *team;
+ int index; /* index of enabled port. If disabled, it's set to -1 */
+
+ bool linkup; /* either state.linkup or user.linkup */
+
+ struct {
+ bool linkup;
+ u32 speed;
+ u8 duplex;
+ } state;
+
+ /* Values set by userspace */
+ struct {
+ bool linkup;
+ bool linkup_enabled;
+ } user;
+
+ /* Custom gennetlink interface related flags */
+ bool changed;
+ bool removed;
+
+ /*
+ * A place for storing original values of the device before it
+ * become a port.
+ */
+ struct {
+ unsigned char dev_addr[MAX_ADDR_LEN];
+ unsigned int mtu;
+ } orig;
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct netpoll *np;
+#endif
+
+ s32 priority; /* lower number ~ higher priority */
+ u16 queue_id;
+ struct list_head qom_list; /* node in queue override mapping list */
+ struct rcu_head rcu;
+ long mode_priv[0];
+};
+
+static inline bool team_port_enabled(struct team_port *port)
+{
+ return port->index != -1;
+}
+
+static inline bool team_port_txable(struct team_port *port)
+{
+ return port->linkup && team_port_enabled(port);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline void team_netpoll_send_skb(struct team_port *port,
+ struct sk_buff *skb)
+{
+ struct netpoll *np = port->np;
+
+ if (np)
+ netpoll_send_skb(np, skb);
+}
+#else
+static inline void team_netpoll_send_skb(struct team_port *port,
+ struct sk_buff *skb)
+{
+}
+#endif
+
+struct team_mode_ops {
+ int (*init)(struct team *team);
+ void (*exit)(struct team *team);
+ rx_handler_result_t (*receive)(struct team *team,
+ struct team_port *port,
+ struct sk_buff *skb);
+ bool (*transmit)(struct team *team, struct sk_buff *skb);
+ int (*port_enter)(struct team *team, struct team_port *port);
+ void (*port_leave)(struct team *team, struct team_port *port);
+ void (*port_change_dev_addr)(struct team *team, struct team_port *port);
+ void (*port_enabled)(struct team *team, struct team_port *port);
+ void (*port_disabled)(struct team *team, struct team_port *port);
+};
+
+extern int team_modeop_port_enter(struct team *team, struct team_port *port);
+extern void team_modeop_port_change_dev_addr(struct team *team,
+ struct team_port *port);
+
+enum team_option_type {
+ TEAM_OPTION_TYPE_U32,
+ TEAM_OPTION_TYPE_STRING,
+ TEAM_OPTION_TYPE_BINARY,
+ TEAM_OPTION_TYPE_BOOL,
+ TEAM_OPTION_TYPE_S32,
+};
+
+struct team_option_inst_info {
+ u32 array_index;
+ struct team_port *port; /* != NULL if per-port */
+};
+
+struct team_gsetter_ctx {
+ union {
+ u32 u32_val;
+ const char *str_val;
+ struct {
+ const void *ptr;
+ u32 len;
+ } bin_val;
+ bool bool_val;
+ s32 s32_val;
+ } data;
+ struct team_option_inst_info *info;
+};
+
+struct team_option {
+ struct list_head list;
+ const char *name;
+ bool per_port;
+ unsigned int array_size; /* != 0 means the option is array */
+ enum team_option_type type;
+ int (*init)(struct team *team, struct team_option_inst_info *info);
+ int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
+ int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
+};
+
+extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
+extern void team_options_change_check(struct team *team);
+
+struct team_mode {
+ const char *kind;
+ struct module *owner;
+ size_t priv_size;
+ size_t port_priv_size;
+ const struct team_mode_ops *ops;
+};
+
+#define TEAM_PORT_HASHBITS 4
+#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
+
+#define TEAM_MODE_PRIV_LONGS 4
+#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
+
+struct team {
+ struct net_device *dev; /* associated netdevice */
+ struct team_pcpu_stats __percpu *pcpu_stats;
+
+ struct mutex lock; /* used for overall locking, e.g. port lists write */
+
+ /*
+ * List of enabled ports and their count
+ */
+ int en_port_count;
+ struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
+
+ struct list_head port_list; /* list of all ports */
+
+ struct list_head option_list;
+ struct list_head option_inst_list; /* list of option instances */
+
+ const struct team_mode *mode;
+ struct team_mode_ops ops;
+ bool user_carrier_enabled;
+ bool queue_override_enabled;
+ struct list_head *qom_lists; /* array of queue override mapping lists */
+ bool port_mtu_change_allowed;
+ struct {
+ unsigned int count;
+ unsigned int interval; /* in ms */
+ atomic_t count_pending;
+ struct delayed_work dw;
+ } notify_peers;
+ struct {
+ unsigned int count;
+ unsigned int interval; /* in ms */
+ atomic_t count_pending;
+ struct delayed_work dw;
+ } mcast_rejoin;
+ long mode_priv[TEAM_MODE_PRIV_LONGS];
+};
+
+static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
+ struct sk_buff *skb)
+{
+ BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
+ sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
+ skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
+
+ skb->dev = port->dev;
+ if (unlikely(netpoll_tx_running(team->dev))) {
+ team_netpoll_send_skb(port, skb);
+ return 0;
+ }
+ return dev_queue_xmit(skb);
+}
+
+static inline struct hlist_head *team_port_index_hash(struct team *team,
+ int port_index)
+{
+ return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
+}
+
+static inline struct team_port *team_get_port_by_index(struct team *team,
+ int port_index)
+{
+ struct team_port *port;
+ struct hlist_head *head = team_port_index_hash(team, port_index);
+
+ hlist_for_each_entry(port, head, hlist)
+ if (port->index == port_index)
+ return port;
+ return NULL;
+}
+
+static inline int team_num_to_port_index(struct team *team, int num)
+{
+ int en_port_count = ACCESS_ONCE(team->en_port_count);
+
+ if (unlikely(!en_port_count))
+ return 0;
+ return num % en_port_count;
+}
+
+static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
+ int port_index)
+{
+ struct team_port *port;
+ struct hlist_head *head = team_port_index_hash(team, port_index);
+
+ hlist_for_each_entry_rcu(port, head, hlist)
+ if (port->index == port_index)
+ return port;
+ return NULL;
+}
+
+static inline struct team_port *
+team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
+{
+ struct team_port *cur;
+
+ if (likely(team_port_txable(port)))
+ return port;
+ cur = port;
+ list_for_each_entry_continue_rcu(cur, &team->port_list, list)
+ if (team_port_txable(cur))
+ return cur;
+ list_for_each_entry_rcu(cur, &team->port_list, list) {
+ if (cur == port)
+ break;
+ if (team_port_txable(cur))
+ return cur;
+ }
+ return NULL;
+}
+
+extern int team_options_register(struct team *team,
+ const struct team_option *option,
+ size_t option_count);
+extern void team_options_unregister(struct team *team,
+ const struct team_option *option,
+ size_t option_count);
+extern int team_mode_register(const struct team_mode *mode);
+extern void team_mode_unregister(const struct team_mode *mode);
+
+#define TEAM_DEFAULT_NUM_TX_QUEUES 16
+#define TEAM_DEFAULT_NUM_RX_QUEUES 16
+
+#endif /* _LINUX_IF_TEAM_H_ */
Code Review / kvmfornfv.git / blobdiff