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 #ifndef _LINUX_IF_TEAM_H_
  11 #define _LINUX_IF_TEAM_H_
  12
  13
  14 #include <linux/netpoll.h>
  15 #include <net/sch_generic.h>
  16 #include <uapi/linux/if_team.h>
  17
  18 struct team_pcpu_stats {
  19         u64                     rx_packets;
  20         u64                     rx_bytes;
  21         u64                     rx_multicast;
  22         u64                     tx_packets;
  23         u64                     tx_bytes;
  24         struct u64_stats_sync   syncp;
  25         u32                     rx_dropped;
  26         u32                     tx_dropped;
  27 };
  28
  29 struct team;
  30
  31 struct team_port {
  32         struct net_device *dev;
  33         struct hlist_node hlist; /* node in enabled ports hash list */
  34         struct list_head list; /* node in ordinary list */
  35         struct team *team;
  36         int index; /* index of enabled port. If disabled, it's set to -1 */
  37
  38         bool linkup; /* either state.linkup or user.linkup */
  39
  40         struct {
  41                 bool linkup;
  42                 u32 speed;
  43                 u8 duplex;
  44         } state;
  45
  46         /* Values set by userspace */
  47         struct {
  48                 bool linkup;
  49                 bool linkup_enabled;
  50         } user;
  51
  52         /* Custom gennetlink interface related flags */
  53         bool changed;
  54         bool removed;
  55
  56         /*
  57          * A place for storing original values of the device before it
  58          * become a port.
  59          */
  60         struct {
  61                 unsigned char dev_addr[MAX_ADDR_LEN];
  62                 unsigned int mtu;
  63         } orig;
  64
  65 #ifdef CONFIG_NET_POLL_CONTROLLER
  66         struct netpoll *np;
  67 #endif
  68
  69         s32 priority; /* lower number ~ higher priority */
  70         u16 queue_id;
  71         struct list_head qom_list; /* node in queue override mapping list */
  72         long mode_priv[0];
  73 };
  74
  75 static inline bool team_port_enabled(struct team_port *port)
  76 {
  77         return port->index != -1;
  78 }
  79
  80 static inline bool team_port_txable(struct team_port *port)
  81 {
  82         return port->linkup && team_port_enabled(port);
  83 }
  84
  85 #ifdef CONFIG_NET_POLL_CONTROLLER
  86 static inline void team_netpoll_send_skb(struct team_port *port,
  87                                          struct sk_buff *skb)
  88 {
  89         struct netpoll *np = port->np;
  90
  91         if (np)
  92                 netpoll_send_skb(np, skb);
  93 }
  94 #else
  95 static inline void team_netpoll_send_skb(struct team_port *port,
  96                                          struct sk_buff *skb)
  97 {
  98 }
  99 #endif
 100
 101 struct team_mode_ops {
 102         int (*init)(struct team *team);
 103         void (*exit)(struct team *team);
 104         rx_handler_result_t (*receive)(struct team *team,
 105                                        struct team_port *port,
 106                                        struct sk_buff *skb);
 107         bool (*transmit)(struct team *team, struct sk_buff *skb);
 108         int (*port_enter)(struct team *team, struct team_port *port);
 109         void (*port_leave)(struct team *team, struct team_port *port);
 110         void (*port_change_dev_addr)(struct team *team, struct team_port *port);
 111         void (*port_enabled)(struct team *team, struct team_port *port);
 112         void (*port_disabled)(struct team *team, struct team_port *port);
 113 };
 114
 115 extern int team_modeop_port_enter(struct team *team, struct team_port *port);
 116 extern void team_modeop_port_change_dev_addr(struct team *team,
 117                                              struct team_port *port);
 118
 119 enum team_option_type {
 120         TEAM_OPTION_TYPE_U32,
 121         TEAM_OPTION_TYPE_STRING,
 122         TEAM_OPTION_TYPE_BINARY,
 123         TEAM_OPTION_TYPE_BOOL,
 124         TEAM_OPTION_TYPE_S32,
 125 };
 126
 127 struct team_option_inst_info {
 128         u32 array_index;
 129         struct team_port *port; /* != NULL if per-port */
 130 };
 131
 132 struct team_gsetter_ctx {
 133         union {
 134                 u32 u32_val;
 135                 const char *str_val;
 136                 struct {
 137                         const void *ptr;
 138                         u32 len;
 139                 } bin_val;
 140                 bool bool_val;
 141                 s32 s32_val;
 142         } data;
 143         struct team_option_inst_info *info;
 144 };
 145
 146 struct team_option {
 147         struct list_head list;
 148         const char *name;
 149         bool per_port;
 150         unsigned int array_size; /* != 0 means the option is array */
 151         enum team_option_type type;
 152         int (*init)(struct team *team, struct team_option_inst_info *info);
 153         int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
 154         int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
 155 };
 156
 157 extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
 158 extern void team_options_change_check(struct team *team);
 159
 160 struct team_mode {
 161         const char *kind;
 162         struct module *owner;
 163         size_t priv_size;
 164         size_t port_priv_size;
 165         const struct team_mode_ops *ops;
 166 };
 167
 168 #define TEAM_PORT_HASHBITS 4
 169 #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
 170
 171 #define TEAM_MODE_PRIV_LONGS 4
 172 #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
 173
 174 struct team {
 175         struct net_device *dev; /* associated netdevice */
 176         struct team_pcpu_stats __percpu *pcpu_stats;
 177
 178         struct mutex lock; /* used for overall locking, e.g. port lists write */
 179
 180         /*
 181          * List of enabled ports and their count
 182          */
 183         int en_port_count;
 184         struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
 185
 186         struct list_head port_list; /* list of all ports */
 187
 188         struct list_head option_list;
 189         struct list_head option_inst_list; /* list of option instances */
 190
 191         const struct team_mode *mode;
 192         struct team_mode_ops ops;
 193         bool user_carrier_enabled;
 194         bool queue_override_enabled;
 195         struct list_head *qom_lists; /* array of queue override mapping lists */
 196         bool port_mtu_change_allowed;
 197         long mode_priv[TEAM_MODE_PRIV_LONGS];
 198 };
 199
 200 static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
 201                                       struct sk_buff *skb)
 202 {
 203         BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
 204                      sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
 205         skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
 206
 207         skb->dev = port->dev;
 208         if (unlikely(netpoll_tx_running(team->dev))) {
 209                 team_netpoll_send_skb(port, skb);
 210                 return 0;
 211         }
 212         return dev_queue_xmit(skb);
 213 }
 214
 215 static inline struct hlist_head *team_port_index_hash(struct team *team,
 216                                                       int port_index)
 217 {
 218         return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
 219 }
 220
 221 static inline struct team_port *team_get_port_by_index(struct team *team,
 222                                                        int port_index)
 223 {
 224         struct team_port *port;
 225         struct hlist_head *head = team_port_index_hash(team, port_index);
 226
 227         hlist_for_each_entry(port, head, hlist)
 228                 if (port->index == port_index)
 229                         return port;
 230         return NULL;
 231 }
 232 static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
 233                                                            int port_index)
 234 {
 235         struct team_port *port;
 236         struct hlist_head *head = team_port_index_hash(team, port_index);
 237
 238         hlist_for_each_entry_rcu(port, head, hlist)
 239                 if (port->index == port_index)
 240                         return port;
 241         return NULL;
 242 }
 243
 244 static inline struct team_port *
 245 team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
 246 {
 247         struct team_port *cur;
 248
 249         if (likely(team_port_txable(port)))
 250                 return port;
 251         cur = port;
 252         list_for_each_entry_continue_rcu(cur, &team->port_list, list)
 253                 if (team_port_txable(cur))
 254                         return cur;
 255         list_for_each_entry_rcu(cur, &team->port_list, list) {
 256                 if (cur == port)
 257                         break;
 258                 if (team_port_txable(cur))
 259                         return cur;
 260         }
 261         return NULL;
 262 }
 263
 264 extern int team_options_register(struct team *team,
 265                                  const struct team_option *option,
 266                                  size_t option_count);
 267 extern void team_options_unregister(struct team *team,
 268                                     const struct team_option *option,
 269                                     size_t option_count);
 270 extern int team_mode_register(const struct team_mode *mode);
 271 extern void team_mode_unregister(const struct team_mode *mode);
 272
 273 #define TEAM_DEFAULT_NUM_TX_QUEUES 16
 274 #define TEAM_DEFAULT_NUM_RX_QUEUES 16
 275
 276 #endif /* _LINUX_IF_TEAM_H_ */