include/linux/if_team.h

   1 /*
   2  * include/linux/if_team.h - Network team device driver header
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #ifndef _LINUX_IF_TEAM_H_
  12 #define _LINUX_IF_TEAM_H_
  13
  14 #ifdef __KERNEL__
  15
  16 struct team_pcpu_stats {
  17         u64                     rx_packets;
  18         u64                     rx_bytes;
  19         u64                     rx_multicast;
  20         u64                     tx_packets;
  21         u64                     tx_bytes;
  22         struct u64_stats_sync   syncp;
  23         u32                     rx_dropped;
  24         u32                     tx_dropped;
  25 };
  26
  27 struct team;
  28
  29 struct team_port {
  30         struct net_device *dev;
  31         struct hlist_node hlist; /* node in hash list */
  32         struct list_head list; /* node in ordinary list */
  33         struct team *team;
  34         int index;
  35
  36         /*
  37          * A place for storing original values of the device before it
  38          * become a port.
  39          */
  40         struct {
  41                 unsigned char dev_addr[MAX_ADDR_LEN];
  42                 unsigned int mtu;
  43         } orig;
  44
  45         bool linkup;
  46         u32 speed;
  47         u8 duplex;
  48
  49         struct rcu_head rcu;
  50 };
  51
  52 struct team_mode_ops {
  53         int (*init)(struct team *team);
  54         void (*exit)(struct team *team);
  55         rx_handler_result_t (*receive)(struct team *team,
  56                                        struct team_port *port,
  57                                        struct sk_buff *skb);
  58         bool (*transmit)(struct team *team, struct sk_buff *skb);
  59         int (*port_enter)(struct team *team, struct team_port *port);
  60         void (*port_leave)(struct team *team, struct team_port *port);
  61         void (*port_change_mac)(struct team *team, struct team_port *port);
  62 };
  63
  64 enum team_option_type {
  65         TEAM_OPTION_TYPE_U32,
  66         TEAM_OPTION_TYPE_STRING,
  67 };
  68
  69 struct team_option {
  70         struct list_head list;
  71         const char *name;
  72         enum team_option_type type;
  73         int (*getter)(struct team *team, void *arg);
  74         int (*setter)(struct team *team, void *arg);
  75 };
  76
  77 struct team_mode {
  78         struct list_head list;
  79         const char *kind;
  80         struct module *owner;
  81         size_t priv_size;
  82         const struct team_mode_ops *ops;
  83 };
  84
  85 #define TEAM_PORT_HASHBITS 4
  86 #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
  87
  88 #define TEAM_MODE_PRIV_LONGS 4
  89 #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
  90
  91 struct team {
  92         struct net_device *dev; /* associated netdevice */
  93         struct team_pcpu_stats __percpu *pcpu_stats;
  94
  95         struct mutex lock; /* used for overall locking, e.g. port lists write */
  96
  97         /*
  98          * port lists with port count
  99          */
 100         int port_count;
 101         struct hlist_head port_hlist[TEAM_PORT_HASHENTRIES];
 102         struct list_head port_list;
 103
 104         struct list_head option_list;
 105
 106         const struct team_mode *mode;
 107         struct team_mode_ops ops;
 108         long mode_priv[TEAM_MODE_PRIV_LONGS];
 109 };
 110
 111 static inline struct hlist_head *team_port_index_hash(struct team *team,
 112                                                       int port_index)
 113 {
 114         return &team->port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
 115 }
 116
 117 static inline struct team_port *team_get_port_by_index(struct team *team,
 118                                                        int port_index)
 119 {
 120         struct hlist_node *p;
 121         struct team_port *port;
 122         struct hlist_head *head = team_port_index_hash(team, port_index);
 123
 124         hlist_for_each_entry(port, p, head, hlist)
 125                 if (port->index == port_index)
 126                         return port;
 127         return NULL;
 128 }
 129 static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
 130                                                            int port_index)
 131 {
 132         struct hlist_node *p;
 133         struct team_port *port;
 134         struct hlist_head *head = team_port_index_hash(team, port_index);
 135
 136         hlist_for_each_entry_rcu(port, p, head, hlist)
 137                 if (port->index == port_index)
 138                         return port;
 139         return NULL;
 140 }
 141
 142 extern int team_port_set_team_mac(struct team_port *port);
 143 extern int team_options_register(struct team *team,
 144                                  const struct team_option *option,
 145                                  size_t option_count);
 146 extern void team_options_unregister(struct team *team,
 147                                     const struct team_option *option,
 148                                     size_t option_count);
 149 extern int team_mode_register(struct team_mode *mode);
 150 extern int team_mode_unregister(struct team_mode *mode);
 151
 152 #endif /* __KERNEL__ */
 153
 154 #define TEAM_STRING_MAX_LEN 32
 155
 156 /**********************************
 157  * NETLINK_GENERIC netlink family.
 158  **********************************/
 159
 160 enum {
 161         TEAM_CMD_NOOP,
 162         TEAM_CMD_OPTIONS_SET,
 163         TEAM_CMD_OPTIONS_GET,
 164         TEAM_CMD_PORT_LIST_GET,
 165
 166         __TEAM_CMD_MAX,
 167         TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
 168 };
 169
 170 enum {
 171         TEAM_ATTR_UNSPEC,
 172         TEAM_ATTR_TEAM_IFINDEX,         /* u32 */
 173         TEAM_ATTR_LIST_OPTION,          /* nest */
 174         TEAM_ATTR_LIST_PORT,            /* nest */
 175
 176         __TEAM_ATTR_MAX,
 177         TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
 178 };
 179
 180 /* Nested layout of get/set msg:
 181  *
 182  *      [TEAM_ATTR_LIST_OPTION]
 183  *              [TEAM_ATTR_ITEM_OPTION]
 184  *                      [TEAM_ATTR_OPTION_*], ...
 185  *              [TEAM_ATTR_ITEM_OPTION]
 186  *                      [TEAM_ATTR_OPTION_*], ...
 187  *              ...
 188  *      [TEAM_ATTR_LIST_PORT]
 189  *              [TEAM_ATTR_ITEM_PORT]
 190  *                      [TEAM_ATTR_PORT_*], ...
 191  *              [TEAM_ATTR_ITEM_PORT]
 192  *                      [TEAM_ATTR_PORT_*], ...
 193  *              ...
 194  */
 195
 196 enum {
 197         TEAM_ATTR_ITEM_OPTION_UNSPEC,
 198         TEAM_ATTR_ITEM_OPTION,          /* nest */
 199
 200         __TEAM_ATTR_ITEM_OPTION_MAX,
 201         TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
 202 };
 203
 204 enum {
 205         TEAM_ATTR_OPTION_UNSPEC,
 206         TEAM_ATTR_OPTION_NAME,          /* string */
 207         TEAM_ATTR_OPTION_CHANGED,       /* flag */
 208         TEAM_ATTR_OPTION_TYPE,          /* u8 */
 209         TEAM_ATTR_OPTION_DATA,          /* dynamic */
 210
 211         __TEAM_ATTR_OPTION_MAX,
 212         TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
 213 };
 214
 215 enum {
 216         TEAM_ATTR_ITEM_PORT_UNSPEC,
 217         TEAM_ATTR_ITEM_PORT,            /* nest */
 218
 219         __TEAM_ATTR_ITEM_PORT_MAX,
 220         TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
 221 };
 222
 223 enum {
 224         TEAM_ATTR_PORT_UNSPEC,
 225         TEAM_ATTR_PORT_IFINDEX,         /* u32 */
 226         TEAM_ATTR_PORT_CHANGED,         /* flag */
 227         TEAM_ATTR_PORT_LINKUP,          /* flag */
 228         TEAM_ATTR_PORT_SPEED,           /* u32 */
 229         TEAM_ATTR_PORT_DUPLEX,          /* u8 */
 230
 231         __TEAM_ATTR_PORT_MAX,
 232         TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
 233 };
 234
 235 /*
 236  * NETLINK_GENERIC related info
 237  */
 238 #define TEAM_GENL_NAME "team"
 239 #define TEAM_GENL_VERSION 0x1
 240 #define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
 241
 242 #endif /* _LINUX_IF_TEAM_H_ */