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[0];
  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        struct netpoll *np = port->np;
 106
 107        if (np)
 108                netpoll_send_skb(np, skb);
 109}
 110#else
 111static inline void team_netpoll_send_skb(struct team_port *port,
 112                                         struct sk_buff *skb)
 113{
 114}
 115#endif
 116
 117struct 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
 131extern int team_modeop_port_enter(struct team *team, struct team_port *port);
 132extern void team_modeop_port_change_dev_addr(struct team *team,
 133                                             struct team_port *port);
 134
 135enum 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
 143struct team_option_inst_info {
 144        u32 array_index;
 145        struct team_port *port; /* != NULL if per-port */
 146};
 147
 148struct 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
 162struct 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
 173extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
 174extern void team_options_change_check(struct team *team);
 175
 176struct 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
 191struct 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
 229static 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
 244static 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
 250static 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
 262static 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
 271static 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
 283static inline struct team_port *
 284team_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
 303extern int team_options_register(struct team *team,
 304                                 const struct team_option *option,
 305                                 size_t option_count);
 306extern void team_options_unregister(struct team *team,
 307                                    const struct team_option *option,
 308                                    size_t option_count);
 309extern int team_mode_register(const struct team_mode *mode);
 310extern 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_ */
 318