LXR linux/include/linux/if

   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 <jpirko@redhat.com>
   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
  14struct 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
  26struct team;
  27
  28struct 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[];
  71};
  72
  73static inline struct team_port *team_port_get_rcu(const struct net_device *dev)
  74{
  75        return rcu_dereference(dev->rx_handler_data);
  76}
  77
  78static inline bool team_port_enabled(struct team_port *port)
  79{
  80        return port->index != -1;
  81}
  82
  83static inline bool team_port_txable(struct team_port *port)
  84{
  85        return port->linkup && team_port_enabled(port);
  86}
  87
  88static 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
 102static inline void team_netpoll_send_skb(struct team_port *port,
 103                                         struct sk_buff *skb)
 104{
 105        netpoll_send_skb(port->np, skb);
 106}
 107#else
 108static inline void team_netpoll_send_skb(struct team_port *port,
 109                                         struct sk_buff *skb)
 110{
 111}
 112#endif
 113
 114struct team_mode_ops {
 115        int (*init)(struct team *team);
 116        void (*exit)(struct team *team);
 117        rx_handler_result_t (*receive)(struct team *team,
 118                                       struct team_port *port,
 119                                       struct sk_buff *skb);
 120        bool (*transmit)(struct team *team, struct sk_buff *skb);
 121        int (*port_enter)(struct team *team, struct team_port *port);
 122        void (*port_leave)(struct team *team, struct team_port *port);
 123        void (*port_change_dev_addr)(struct team *team, struct team_port *port);
 124        void (*port_enabled)(struct team *team, struct team_port *port);
 125        void (*port_disabled)(struct team *team, struct team_port *port);
 126};
 127
 128extern int team_modeop_port_enter(struct team *team, struct team_port *port);
 129extern void team_modeop_port_change_dev_addr(struct team *team,
 130                                             struct team_port *port);
 131
 132enum team_option_type {
 133        TEAM_OPTION_TYPE_U32,
 134        TEAM_OPTION_TYPE_STRING,
 135        TEAM_OPTION_TYPE_BINARY,
 136        TEAM_OPTION_TYPE_BOOL,
 137        TEAM_OPTION_TYPE_S32,
 138};
 139
 140struct team_option_inst_info {
 141        u32 array_index;
 142        struct team_port *port; /* != NULL if per-port */
 143};
 144
 145struct team_gsetter_ctx {
 146        union {
 147                u32 u32_val;
 148                const char *str_val;
 149                struct {
 150                        const void *ptr;
 151                        u32 len;
 152                } bin_val;
 153                bool bool_val;
 154                s32 s32_val;
 155        } data;
 156        struct team_option_inst_info *info;
 157};
 158
 159struct team_option {
 160        struct list_head list;
 161        const char *name;
 162        bool per_port;
 163        unsigned int array_size; /* != 0 means the option is array */
 164        enum team_option_type type;
 165        int (*init)(struct team *team, struct team_option_inst_info *info);
 166        int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
 167        int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
 168};
 169
 170extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
 171extern void team_options_change_check(struct team *team);
 172
 173struct team_mode {
 174        const char *kind;
 175        struct module *owner;
 176        size_t priv_size;
 177        size_t port_priv_size;
 178        const struct team_mode_ops *ops;
 179        enum netdev_lag_tx_type lag_tx_type;
 180};
 181
 182#define TEAM_PORT_HASHBITS 4
 183#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
 184
 185#define TEAM_MODE_PRIV_LONGS 4
 186#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
 187
 188struct team {
 189        struct net_device *dev; /* associated netdevice */
 190        struct team_pcpu_stats __percpu *pcpu_stats;
 191
 192        struct mutex lock; /* used for overall locking, e.g. port lists write */
 193
 194        /*
 195         * List of enabled ports and their count
 196         */
 197        int en_port_count;
 198        struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
 199
 200        struct list_head port_list; /* list of all ports */
 201
 202        struct list_head option_list;
 203        struct list_head option_inst_list; /* list of option instances */
 204
 205        const struct team_mode *mode;
 206        struct team_mode_ops ops;
 207        bool user_carrier_enabled;
 208        bool queue_override_enabled;
 209        struct list_head *qom_lists; /* array of queue override mapping lists */
 210        bool port_mtu_change_allowed;
 211        struct {
 212                unsigned int count;
 213                unsigned int interval; /* in ms */
 214                atomic_t count_pending;
 215                struct delayed_work dw;
 216        } notify_peers;
 217        struct {
 218                unsigned int count;
 219                unsigned int interval; /* in ms */
 220                atomic_t count_pending;
 221                struct delayed_work dw;
 222        } mcast_rejoin;
 223        struct lock_class_key team_lock_key;
 224        long mode_priv[TEAM_MODE_PRIV_LONGS];
 225};
 226
 227static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
 228                                      struct sk_buff *skb)
 229{
 230        BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
 231                     sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
 232        skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
 233
 234        skb->dev = port->dev;
 235        if (unlikely(netpoll_tx_running(team->dev))) {
 236                team_netpoll_send_skb(port, skb);
 237                return 0;
 238        }
 239        return dev_queue_xmit(skb);
 240}
 241
 242static inline struct hlist_head *team_port_index_hash(struct team *team,
 243                                                      int port_index)
 244{
 245        return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
 246}
 247
 248static inline struct team_port *team_get_port_by_index(struct team *team,
 249                                                       int port_index)
 250{
 251        struct team_port *port;
 252        struct hlist_head *head = team_port_index_hash(team, port_index);
 253
 254        hlist_for_each_entry(port, head, hlist)
 255                if (port->index == port_index)
 256                        return port;
 257        return NULL;
 258}
 259
 260static inline int team_num_to_port_index(struct team *team, unsigned int num)
 261{
 262        int en_port_count = READ_ONCE(team->en_port_count);
 263
 264        if (unlikely(!en_port_count))
 265                return 0;
 266        return num % en_port_count;
 267}
 268
 269static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
 270                                                           int port_index)
 271{
 272        struct team_port *port;
 273        struct hlist_head *head = team_port_index_hash(team, port_index);
 274
 275        hlist_for_each_entry_rcu(port, head, hlist)
 276                if (port->index == port_index)
 277                        return port;
 278        return NULL;
 279}
 280
 281static inline struct team_port *
 282team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
 283{
 284        struct team_port *cur;
 285
 286        if (likely(team_port_txable(port)))
 287                return port;
 288        cur = port;
 289        list_for_each_entry_continue_rcu(cur, &team->port_list, list)
 290                if (team_port_txable(cur))
 291                        return cur;
 292        list_for_each_entry_rcu(cur, &team->port_list, list) {
 293                if (cur == port)
 294                        break;
 295                if (team_port_txable(cur))
 296                        return cur;
 297        }
 298        return NULL;
 299}
 300
 301extern int team_options_register(struct team *team,
 302                                 const struct team_option *option,
 303                                 size_t option_count);
 304extern void team_options_unregister(struct team *team,
 305                                    const struct team_option *option,
 306                                    size_t option_count);
 307extern int team_mode_register(const struct team_mode *mode);
 308extern void team_mode_unregister(const struct team_mode *mode);
 309
 310#define TEAM_DEFAULT_NUM_TX_QUEUES 16
 311#define TEAM_DEFAULT_NUM_RX_QUEUES 16
 312
 313#define MODULE_ALIAS_TEAM_MODE(kind) MODULE_ALIAS("team-mode-" kind)
 314
 315#endif /* _LINUX_IF_TEAM_H_ */
 316