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 enabled ports hash list */
  32         struct list_head list; /* node in ordinary list */
  33         struct team *team;
  34         int index; /* index of enabled port. If disabled, it's set to -1 */
  35
  36         bool linkup; /* either state.linkup or user.linkup */
  37
  38         struct {
  39                 bool linkup;
  40                 u32 speed;
  41                 u8 duplex;
  42         } state;
  43
  44         /* Values set by userspace */
  45         struct {
  46                 bool linkup;
  47                 bool linkup_enabled;
  48         } user;
  49
  50         /* Custom gennetlink interface related flags */
  51         bool changed;
  52         bool removed;
  53
  54         /*
  55          * A place for storing original values of the device before it
  56          * become a port.
  57          */
  58         struct {
  59                 unsigned char dev_addr[MAX_ADDR_LEN];
  60                 unsigned int mtu;
  61         } orig;
  62
  63         struct rcu_head rcu;
  64         long mode_priv[0];
  65 };
  66
  67 struct team_mode_ops {
  68         int (*init)(struct team *team);
  69         void (*exit)(struct team *team);
  70         rx_handler_result_t (*receive)(struct team *team,
  71                                        struct team_port *port,
  72                                        struct sk_buff *skb);
  73         bool (*transmit)(struct team *team, struct sk_buff *skb);
  74         int (*port_enter)(struct team *team, struct team_port *port);
  75         void (*port_leave)(struct team *team, struct team_port *port);
  76         void (*port_change_mac)(struct team *team, struct team_port *port);
  77 };
  78
  79 enum team_option_type {
  80         TEAM_OPTION_TYPE_U32,
  81         TEAM_OPTION_TYPE_STRING,
  82         TEAM_OPTION_TYPE_BINARY,
  83         TEAM_OPTION_TYPE_BOOL,
  84 };
  85
  86 struct team_gsetter_ctx {
  87         union {
  88                 u32 u32_val;
  89                 const char *str_val;
  90                 struct {
  91                         const void *ptr;
  92                         u32 len;
  93                 } bin_val;
  94                 bool bool_val;
  95         } data;
  96         struct team_port *port;
  97 };
  98
  99 struct team_option {
 100         struct list_head list;
 101         const char *name;
 102         bool per_port;
 103         enum team_option_type type;
 104         int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
 105         int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
 106 };
 107
 108 struct team_mode {
 109         const char *kind;
 110         struct module *owner;
 111         size_t priv_size;
 112         size_t port_priv_size;
 113         const struct team_mode_ops *ops;
 114 };
 115
 116 #define TEAM_PORT_HASHBITS 4
 117 #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
 118
 119 #define TEAM_MODE_PRIV_LONGS 4
 120 #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
 121
 122 struct team {
 123         struct net_device *dev; /* associated netdevice */
 124         struct team_pcpu_stats __percpu *pcpu_stats;
 125
 126         struct mutex lock; /* used for overall locking, e.g. port lists write */
 127
 128         /*
 129          * List of enabled ports and their count
 130          */
 131         int en_port_count;
 132         struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
 133
 134         struct list_head port_list; /* list of all ports */
 135
 136         struct list_head option_list;
 137         struct list_head option_inst_list; /* list of option instances */
 138
 139         const struct team_mode *mode;
 140         struct team_mode_ops ops;
 141         long mode_priv[TEAM_MODE_PRIV_LONGS];
 142 };
 143
 144 static inline struct hlist_head *team_port_index_hash(struct team *team,
 145                                                       int port_index)
 146 {
 147         return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
 148 }
 149
 150 static inline struct team_port *team_get_port_by_index(struct team *team,
 151                                                        int port_index)
 152 {
 153         struct hlist_node *p;
 154         struct team_port *port;
 155         struct hlist_head *head = team_port_index_hash(team, port_index);
 156
 157         hlist_for_each_entry(port, p, head, hlist)
 158                 if (port->index == port_index)
 159                         return port;
 160         return NULL;
 161 }
 162 static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
 163                                                            int port_index)
 164 {
 165         struct hlist_node *p;
 166         struct team_port *port;
 167         struct hlist_head *head = team_port_index_hash(team, port_index);
 168
 169         hlist_for_each_entry_rcu(port, p, head, hlist)
 170                 if (port->index == port_index)
 171                         return port;
 172         return NULL;
 173 }
 174
 175 extern int team_port_set_team_mac(struct team_port *port);
 176 extern int team_options_register(struct team *team,
 177                                  const struct team_option *option,
 178                                  size_t option_count);
 179 extern void team_options_unregister(struct team *team,
 180                                     const struct team_option *option,
 181                                     size_t option_count);
 182 extern int team_mode_register(const struct team_mode *mode);
 183 extern void team_mode_unregister(const struct team_mode *mode);
 184
 185 #endif /* __KERNEL__ */
 186
 187 #define TEAM_STRING_MAX_LEN 32
 188
 189 /**********************************
 190  * NETLINK_GENERIC netlink family.
 191  **********************************/
 192
 193 enum {
 194         TEAM_CMD_NOOP,
 195         TEAM_CMD_OPTIONS_SET,
 196         TEAM_CMD_OPTIONS_GET,
 197         TEAM_CMD_PORT_LIST_GET,
 198
 199         __TEAM_CMD_MAX,
 200         TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
 201 };
 202
 203 enum {
 204         TEAM_ATTR_UNSPEC,
 205         TEAM_ATTR_TEAM_IFINDEX,         /* u32 */
 206         TEAM_ATTR_LIST_OPTION,          /* nest */
 207         TEAM_ATTR_LIST_PORT,            /* nest */
 208
 209         __TEAM_ATTR_MAX,
 210         TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
 211 };
 212
 213 /* Nested layout of get/set msg:
 214  *
 215  *      [TEAM_ATTR_LIST_OPTION]
 216  *              [TEAM_ATTR_ITEM_OPTION]
 217  *                      [TEAM_ATTR_OPTION_*], ...
 218  *              [TEAM_ATTR_ITEM_OPTION]
 219  *                      [TEAM_ATTR_OPTION_*], ...
 220  *              ...
 221  *      [TEAM_ATTR_LIST_PORT]
 222  *              [TEAM_ATTR_ITEM_PORT]
 223  *                      [TEAM_ATTR_PORT_*], ...
 224  *              [TEAM_ATTR_ITEM_PORT]
 225  *                      [TEAM_ATTR_PORT_*], ...
 226  *              ...
 227  */
 228
 229 enum {
 230         TEAM_ATTR_ITEM_OPTION_UNSPEC,
 231         TEAM_ATTR_ITEM_OPTION,          /* nest */
 232
 233         __TEAM_ATTR_ITEM_OPTION_MAX,
 234         TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
 235 };
 236
 237 enum {
 238         TEAM_ATTR_OPTION_UNSPEC,
 239         TEAM_ATTR_OPTION_NAME,          /* string */
 240         TEAM_ATTR_OPTION_CHANGED,       /* flag */
 241         TEAM_ATTR_OPTION_TYPE,          /* u8 */
 242         TEAM_ATTR_OPTION_DATA,          /* dynamic */
 243         TEAM_ATTR_OPTION_REMOVED,       /* flag */
 244         TEAM_ATTR_OPTION_PORT_IFINDEX,  /* u32 */ /* for per-port options */
 245
 246         __TEAM_ATTR_OPTION_MAX,
 247         TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
 248 };
 249
 250 enum {
 251         TEAM_ATTR_ITEM_PORT_UNSPEC,
 252         TEAM_ATTR_ITEM_PORT,            /* nest */
 253
 254         __TEAM_ATTR_ITEM_PORT_MAX,
 255         TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
 256 };
 257
 258 enum {
 259         TEAM_ATTR_PORT_UNSPEC,
 260         TEAM_ATTR_PORT_IFINDEX,         /* u32 */
 261         TEAM_ATTR_PORT_CHANGED,         /* flag */
 262         TEAM_ATTR_PORT_LINKUP,          /* flag */
 263         TEAM_ATTR_PORT_SPEED,           /* u32 */
 264         TEAM_ATTR_PORT_DUPLEX,          /* u8 */
 265         TEAM_ATTR_PORT_REMOVED,         /* flag */
 266
 267         __TEAM_ATTR_PORT_MAX,
 268         TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
 269 };
 270
 271 /*
 272  * NETLINK_GENERIC related info
 273  */
 274 #define TEAM_GENL_NAME "team"
 275 #define TEAM_GENL_VERSION 0x1
 276 #define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
 277
 278 #endif /* _LINUX_IF_TEAM_H_ */