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 #include <linux/netpoll.h>
  17 #include <net/sch_generic.h>
  18
  19 struct team_pcpu_stats {
  20         u64                     rx_packets;
  21         u64                     rx_bytes;
  22         u64                     rx_multicast;
  23         u64                     tx_packets;
  24         u64                     tx_bytes;
  25         struct u64_stats_sync   syncp;
  26         u32                     rx_dropped;
  27         u32                     tx_dropped;
  28 };
  29
  30 struct team;
  31
  32 struct team_port {
  33         struct net_device *dev;
  34         struct hlist_node hlist; /* node in enabled ports hash list */
  35         struct list_head list; /* node in ordinary list */
  36         struct team *team;
  37         int index; /* index of enabled port. If disabled, it's set to -1 */
  38
  39         bool linkup; /* either state.linkup or user.linkup */
  40
  41         struct {
  42                 bool linkup;
  43                 u32 speed;
  44                 u8 duplex;
  45         } state;
  46
  47         /* Values set by userspace */
  48         struct {
  49                 bool linkup;
  50                 bool linkup_enabled;
  51         } user;
  52
  53         /* Custom gennetlink interface related flags */
  54         bool changed;
  55         bool removed;
  56
  57         /*
  58          * A place for storing original values of the device before it
  59          * become a port.
  60          */
  61         struct {
  62                 unsigned char dev_addr[MAX_ADDR_LEN];
  63                 unsigned int mtu;
  64         } orig;
  65
  66 #ifdef CONFIG_NET_POLL_CONTROLLER
  67         struct netpoll *np;
  68 #endif
  69
  70         long mode_priv[0];
  71 };
  72
  73 static inline bool team_port_enabled(struct team_port *port)
  74 {
  75         return port->index != -1;
  76 }
  77
  78 static inline bool team_port_txable(struct team_port *port)
  79 {
  80         return port->linkup && team_port_enabled(port);
  81 }
  82
  83 #ifdef CONFIG_NET_POLL_CONTROLLER
  84 static inline void team_netpoll_send_skb(struct team_port *port,
  85                                          struct sk_buff *skb)
  86 {
  87         struct netpoll *np = port->np;
  88
  89         if (np)
  90                 netpoll_send_skb(np, skb);
  91 }
  92 #else
  93 static inline void team_netpoll_send_skb(struct team_port *port,
  94                                          struct sk_buff *skb)
  95 {
  96 }
  97 #endif
  98
  99 struct team_mode_ops {
 100         int (*init)(struct team *team);
 101         void (*exit)(struct team *team);
 102         rx_handler_result_t (*receive)(struct team *team,
 103                                        struct team_port *port,
 104                                        struct sk_buff *skb);
 105         bool (*transmit)(struct team *team, struct sk_buff *skb);
 106         int (*port_enter)(struct team *team, struct team_port *port);
 107         void (*port_leave)(struct team *team, struct team_port *port);
 108         void (*port_change_mac)(struct team *team, struct team_port *port);
 109         void (*port_enabled)(struct team *team, struct team_port *port);
 110         void (*port_disabled)(struct team *team, struct team_port *port);
 111 };
 112
 113 enum team_option_type {
 114         TEAM_OPTION_TYPE_U32,
 115         TEAM_OPTION_TYPE_STRING,
 116         TEAM_OPTION_TYPE_BINARY,
 117         TEAM_OPTION_TYPE_BOOL,
 118 };
 119
 120 struct team_option_inst_info {
 121         u32 array_index;
 122         struct team_port *port; /* != NULL if per-port */
 123 };
 124
 125 struct team_gsetter_ctx {
 126         union {
 127                 u32 u32_val;
 128                 const char *str_val;
 129                 struct {
 130                         const void *ptr;
 131                         u32 len;
 132                 } bin_val;
 133                 bool bool_val;
 134         } data;
 135         struct team_option_inst_info *info;
 136 };
 137
 138 struct team_option {
 139         struct list_head list;
 140         const char *name;
 141         bool per_port;
 142         unsigned int array_size; /* != 0 means the option is array */
 143         enum team_option_type type;
 144         int (*init)(struct team *team, struct team_option_inst_info *info);
 145         int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
 146         int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
 147 };
 148
 149 extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
 150 extern void team_options_change_check(struct team *team);
 151
 152 struct team_mode {
 153         const char *kind;
 154         struct module *owner;
 155         size_t priv_size;
 156         size_t port_priv_size;
 157         const struct team_mode_ops *ops;
 158 };
 159
 160 #define TEAM_PORT_HASHBITS 4
 161 #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
 162
 163 #define TEAM_MODE_PRIV_LONGS 4
 164 #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
 165
 166 struct team {
 167         struct net_device *dev; /* associated netdevice */
 168         struct team_pcpu_stats __percpu *pcpu_stats;
 169
 170         struct mutex lock; /* used for overall locking, e.g. port lists write */
 171
 172         /*
 173          * List of enabled ports and their count
 174          */
 175         int en_port_count;
 176         struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
 177
 178         struct list_head port_list; /* list of all ports */
 179
 180         struct list_head option_list;
 181         struct list_head option_inst_list; /* list of option instances */
 182
 183         const struct team_mode *mode;
 184         struct team_mode_ops ops;
 185         long mode_priv[TEAM_MODE_PRIV_LONGS];
 186 };
 187
 188 static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
 189                                       struct sk_buff *skb)
 190 {
 191         BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
 192                      sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
 193         skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
 194
 195         skb->dev = port->dev;
 196         if (unlikely(netpoll_tx_running(team->dev))) {
 197                 team_netpoll_send_skb(port, skb);
 198                 return 0;
 199         }
 200         return dev_queue_xmit(skb);
 201 }
 202
 203 static inline struct hlist_head *team_port_index_hash(struct team *team,
 204                                                       int port_index)
 205 {
 206         return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
 207 }
 208
 209 static inline struct team_port *team_get_port_by_index(struct team *team,
 210                                                        int port_index)
 211 {
 212         struct hlist_node *p;
 213         struct team_port *port;
 214         struct hlist_head *head = team_port_index_hash(team, port_index);
 215
 216         hlist_for_each_entry(port, p, head, hlist)
 217                 if (port->index == port_index)
 218                         return port;
 219         return NULL;
 220 }
 221 static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
 222                                                            int port_index)
 223 {
 224         struct hlist_node *p;
 225         struct team_port *port;
 226         struct hlist_head *head = team_port_index_hash(team, port_index);
 227
 228         hlist_for_each_entry_rcu(port, p, head, hlist)
 229                 if (port->index == port_index)
 230                         return port;
 231         return NULL;
 232 }
 233
 234 extern int team_port_set_team_mac(struct team_port *port);
 235 extern int team_options_register(struct team *team,
 236                                  const struct team_option *option,
 237                                  size_t option_count);
 238 extern void team_options_unregister(struct team *team,
 239                                     const struct team_option *option,
 240                                     size_t option_count);
 241 extern int team_mode_register(const struct team_mode *mode);
 242 extern void team_mode_unregister(const struct team_mode *mode);
 243
 244 #define TEAM_DEFAULT_NUM_TX_QUEUES 16
 245 #define TEAM_DEFAULT_NUM_RX_QUEUES 16
 246
 247 #endif /* __KERNEL__ */
 248
 249 #define TEAM_STRING_MAX_LEN 32
 250
 251 /**********************************
 252  * NETLINK_GENERIC netlink family.
 253  **********************************/
 254
 255 enum {
 256         TEAM_CMD_NOOP,
 257         TEAM_CMD_OPTIONS_SET,
 258         TEAM_CMD_OPTIONS_GET,
 259         TEAM_CMD_PORT_LIST_GET,
 260
 261         __TEAM_CMD_MAX,
 262         TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
 263 };
 264
 265 enum {
 266         TEAM_ATTR_UNSPEC,
 267         TEAM_ATTR_TEAM_IFINDEX,         /* u32 */
 268         TEAM_ATTR_LIST_OPTION,          /* nest */
 269         TEAM_ATTR_LIST_PORT,            /* nest */
 270
 271         __TEAM_ATTR_MAX,
 272         TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
 273 };
 274
 275 /* Nested layout of get/set msg:
 276  *
 277  *      [TEAM_ATTR_LIST_OPTION]
 278  *              [TEAM_ATTR_ITEM_OPTION]
 279  *                      [TEAM_ATTR_OPTION_*], ...
 280  *              [TEAM_ATTR_ITEM_OPTION]
 281  *                      [TEAM_ATTR_OPTION_*], ...
 282  *              ...
 283  *      [TEAM_ATTR_LIST_PORT]
 284  *              [TEAM_ATTR_ITEM_PORT]
 285  *                      [TEAM_ATTR_PORT_*], ...
 286  *              [TEAM_ATTR_ITEM_PORT]
 287  *                      [TEAM_ATTR_PORT_*], ...
 288  *              ...
 289  */
 290
 291 enum {
 292         TEAM_ATTR_ITEM_OPTION_UNSPEC,
 293         TEAM_ATTR_ITEM_OPTION,          /* nest */
 294
 295         __TEAM_ATTR_ITEM_OPTION_MAX,
 296         TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
 297 };
 298
 299 enum {
 300         TEAM_ATTR_OPTION_UNSPEC,
 301         TEAM_ATTR_OPTION_NAME,          /* string */
 302         TEAM_ATTR_OPTION_CHANGED,       /* flag */
 303         TEAM_ATTR_OPTION_TYPE,          /* u8 */
 304         TEAM_ATTR_OPTION_DATA,          /* dynamic */
 305         TEAM_ATTR_OPTION_REMOVED,       /* flag */
 306         TEAM_ATTR_OPTION_PORT_IFINDEX,  /* u32 */ /* for per-port options */
 307         TEAM_ATTR_OPTION_ARRAY_INDEX,   /* u32 */ /* for array options */
 308
 309         __TEAM_ATTR_OPTION_MAX,
 310         TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
 311 };
 312
 313 enum {
 314         TEAM_ATTR_ITEM_PORT_UNSPEC,
 315         TEAM_ATTR_ITEM_PORT,            /* nest */
 316
 317         __TEAM_ATTR_ITEM_PORT_MAX,
 318         TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
 319 };
 320
 321 enum {
 322         TEAM_ATTR_PORT_UNSPEC,
 323         TEAM_ATTR_PORT_IFINDEX,         /* u32 */
 324         TEAM_ATTR_PORT_CHANGED,         /* flag */
 325         TEAM_ATTR_PORT_LINKUP,          /* flag */
 326         TEAM_ATTR_PORT_SPEED,           /* u32 */
 327         TEAM_ATTR_PORT_DUPLEX,          /* u8 */
 328         TEAM_ATTR_PORT_REMOVED,         /* flag */
 329
 330         __TEAM_ATTR_PORT_MAX,
 331         TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
 332 };
 333
 334 /*
 335  * NETLINK_GENERIC related info
 336  */
 337 #define TEAM_GENL_NAME "team"
 338 #define TEAM_GENL_VERSION 0x1
 339 #define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
 340
 341 #endif /* _LINUX_IF_TEAM_H_ */