include/linux/if_team.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * include/linux/if_team.h - Network team device driver header
   4  * Copyright (c) 2011 Jiri Pirko <[email protected]>
   5  */
   6 #ifndef _LINUX_IF_TEAM_H_
   7 #define _LINUX_IF_TEAM_H_
   8
   9 #include <linux/netpoll.h>
  10 #include <net/sch_generic.h>
  11 #include <linux/types.h>
  12 #include <uapi/linux/if_team.h>
  13
  14 struct team_pcpu_stats {
  15         u64                     rx_packets;
  16         u64                     rx_bytes;
  17         u64                     rx_multicast;
  18         u64                     tx_packets;
  19         u64                     tx_bytes;
  20         struct u64_stats_sync   syncp;
  21         u32                     rx_dropped;
  22         u32                     tx_dropped;
  23         u32                     rx_nohandler;
  24 };
  25
  26 struct team;
  27
  28 struct team_port {
  29         struct net_device *dev;
  30         struct hlist_node hlist; /* node in enabled ports hash list */
  31         struct list_head list; /* node in ordinary list */
  32         struct team *team;
  33         int index; /* index of enabled port. If disabled, it's set to -1 */
  34
  35         bool linkup; /* either state.linkup or user.linkup */
  36
  37         struct {
  38                 bool linkup;
  39                 u32 speed;
  40                 u8 duplex;
  41         } state;
  42
  43         /* Values set by userspace */
  44         struct {
  45                 bool linkup;
  46                 bool linkup_enabled;
  47         } user;
  48
  49         /* Custom gennetlink interface related flags */
  50         bool changed;
  51         bool removed;
  52
  53         /*
  54          * A place for storing original values of the device before it
  55          * become a port.
  56          */
  57         struct {
  58                 unsigned char dev_addr[MAX_ADDR_LEN];
  59                 unsigned int mtu;
  60         } orig;
  61
  62 #ifdef CONFIG_NET_POLL_CONTROLLER
  63         struct netpoll *np;
  64 #endif
  65
  66         s32 priority; /* lower number ~ higher priority */
  67         u16 queue_id;
  68         struct list_head qom_list; /* node in queue override mapping list */
  69         struct rcu_head rcu;
  70         long mode_priv[0];
  71 };
  72
  73 static inline struct team_port *team_port_get_rcu(const struct net_device *dev)
  74 {
  75         return rcu_dereference(dev->rx_handler_data);
  76 }
  77
  78 static inline bool team_port_enabled(struct team_port *port)
  79 {
  80         return port->index != -1;
  81 }
  82
  83 static inline bool team_port_txable(struct team_port *port)
  84 {
  85         return port->linkup && team_port_enabled(port);
  86 }
  87
  88 static inline bool team_port_dev_txable(const struct net_device *port_dev)
  89 {
  90         struct team_port *port;
  91         bool txable;
  92
  93         rcu_read_lock();
  94         port = team_port_get_rcu(port_dev);
  95         txable = port ? team_port_txable(port) : false;
  96         rcu_read_unlock();
  97
  98         return txable;
  99 }
 100
 101 #ifdef CONFIG_NET_POLL_CONTROLLER
 102 static inline void team_netpoll_send_skb(struct team_port *port,
 103                                          struct sk_buff *skb)
 104 {
 105         struct netpoll *np = port->np;
 106
 107         if (np)
 108                 netpoll_send_skb(np, skb);
 109 }
 110 #else
 111 static inline void team_netpoll_send_skb(struct team_port *port,
 112                                          struct sk_buff *skb)
 113 {
 114 }
 115 #endif
 116
 117 struct team_mode_ops {
 118         int (*init)(struct team *team);
 119         void (*exit)(struct team *team);
 120         rx_handler_result_t (*receive)(struct team *team,
 121                                        struct team_port *port,
 122                                        struct sk_buff *skb);
 123         bool (*transmit)(struct team *team, struct sk_buff *skb);
 124         int (*port_enter)(struct team *team, struct team_port *port);
 125         void (*port_leave)(struct team *team, struct team_port *port);
 126         void (*port_change_dev_addr)(struct team *team, struct team_port *port);
 127         void (*port_enabled)(struct team *team, struct team_port *port);
 128         void (*port_disabled)(struct team *team, struct team_port *port);
 129 };
 130
 131 extern int team_modeop_port_enter(struct team *team, struct team_port *port);
 132 extern void team_modeop_port_change_dev_addr(struct team *team,
 133                                              struct team_port *port);
 134
 135 enum team_option_type {
 136         TEAM_OPTION_TYPE_U32,
 137         TEAM_OPTION_TYPE_STRING,
 138         TEAM_OPTION_TYPE_BINARY,
 139         TEAM_OPTION_TYPE_BOOL,
 140         TEAM_OPTION_TYPE_S32,
 141 };
 142
 143 struct team_option_inst_info {
 144         u32 array_index;
 145         struct team_port *port; /* != NULL if per-port */
 146 };
 147
 148 struct team_gsetter_ctx {
 149         union {
 150                 u32 u32_val;
 151                 const char *str_val;
 152                 struct {
 153                         const void *ptr;
 154                         u32 len;
 155                 } bin_val;
 156                 bool bool_val;
 157                 s32 s32_val;
 158         } data;
 159         struct team_option_inst_info *info;
 160 };
 161
 162 struct team_option {
 163         struct list_head list;
 164         const char *name;
 165         bool per_port;
 166         unsigned int array_size; /* != 0 means the option is array */
 167         enum team_option_type type;
 168         int (*init)(struct team *team, struct team_option_inst_info *info);
 169         int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
 170         int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
 171 };
 172
 173 extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
 174 extern void team_options_change_check(struct team *team);
 175
 176 struct team_mode {
 177         const char *kind;
 178         struct module *owner;
 179         size_t priv_size;
 180         size_t port_priv_size;
 181         const struct team_mode_ops *ops;
 182         enum netdev_lag_tx_type lag_tx_type;
 183 };
 184
 185 #define TEAM_PORT_HASHBITS 4
 186 #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
 187
 188 #define TEAM_MODE_PRIV_LONGS 4
 189 #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
 190
 191 struct team {
 192         struct net_device *dev; /* associated netdevice */
 193         struct team_pcpu_stats __percpu *pcpu_stats;
 194
 195         struct mutex lock; /* used for overall locking, e.g. port lists write */
 196
 197         /*
 198          * List of enabled ports and their count
 199          */
 200         int en_port_count;
 201         struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
 202
 203         struct list_head port_list; /* list of all ports */
 204
 205         struct list_head option_list;
 206         struct list_head option_inst_list; /* list of option instances */
 207
 208         const struct team_mode *mode;
 209         struct team_mode_ops ops;
 210         bool user_carrier_enabled;
 211         bool queue_override_enabled;
 212         struct list_head *qom_lists; /* array of queue override mapping lists */
 213         bool port_mtu_change_allowed;
 214         struct {
 215                 unsigned int count;
 216                 unsigned int interval; /* in ms */
 217                 atomic_t count_pending;
 218                 struct delayed_work dw;
 219         } notify_peers;
 220         struct {
 221                 unsigned int count;
 222                 unsigned int interval; /* in ms */
 223                 atomic_t count_pending;
 224                 struct delayed_work dw;
 225         } mcast_rejoin;
 226         long mode_priv[TEAM_MODE_PRIV_LONGS];
 227 };
 228
 229 static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
 230                                       struct sk_buff *skb)
 231 {
 232         BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
 233                      sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
 234         skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
 235
 236         skb->dev = port->dev;
 237         if (unlikely(netpoll_tx_running(team->dev))) {
 238                 team_netpoll_send_skb(port, skb);
 239                 return 0;
 240         }
 241         return dev_queue_xmit(skb);
 242 }
 243
 244 static inline struct hlist_head *team_port_index_hash(struct team *team,
 245                                                       int port_index)
 246 {
 247         return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
 248 }
 249
 250 static inline struct team_port *team_get_port_by_index(struct team *team,
 251                                                        int port_index)
 252 {
 253         struct team_port *port;
 254         struct hlist_head *head = team_port_index_hash(team, port_index);
 255
 256         hlist_for_each_entry(port, head, hlist)
 257                 if (port->index == port_index)
 258                         return port;
 259         return NULL;
 260 }
 261
 262 static inline int team_num_to_port_index(struct team *team, unsigned int num)
 263 {
 264         int en_port_count = READ_ONCE(team->en_port_count);
 265
 266         if (unlikely(!en_port_count))
 267                 return 0;
 268         return num % en_port_count;
 269 }
 270
 271 static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
 272                                                            int port_index)
 273 {
 274         struct team_port *port;
 275         struct hlist_head *head = team_port_index_hash(team, port_index);
 276
 277         hlist_for_each_entry_rcu(port, head, hlist)
 278                 if (port->index == port_index)
 279                         return port;
 280         return NULL;
 281 }
 282
 283 static inline struct team_port *
 284 team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
 285 {
 286         struct team_port *cur;
 287
 288         if (likely(team_port_txable(port)))
 289                 return port;
 290         cur = port;
 291         list_for_each_entry_continue_rcu(cur, &team->port_list, list)
 292                 if (team_port_txable(cur))
 293                         return cur;
 294         list_for_each_entry_rcu(cur, &team->port_list, list) {
 295                 if (cur == port)
 296                         break;
 297                 if (team_port_txable(cur))
 298                         return cur;
 299         }
 300         return NULL;
 301 }
 302
 303 extern int team_options_register(struct team *team,
 304                                  const struct team_option *option,
 305                                  size_t option_count);
 306 extern void team_options_unregister(struct team *team,
 307                                     const struct team_option *option,
 308                                     size_t option_count);
 309 extern int team_mode_register(const struct team_mode *mode);
 310 extern void team_mode_unregister(const struct team_mode *mode);
 311
 312 #define TEAM_DEFAULT_NUM_TX_QUEUES 16
 313 #define TEAM_DEFAULT_NUM_RX_QUEUES 16
 314
 315 #define MODULE_ALIAS_TEAM_MODE(kind) MODULE_ALIAS("team-mode-" kind)
 316
 317 #endif /* _LINUX_IF_TEAM_H_ */