| 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * Definitions for the Interfaces handler. |
| 7 | * |
| 8 | * Version: @(#)dev.h 1.0.10 08/12/93 |
| 9 | * |
| 10 | * Authors: Ross Biro |
| 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> |
| 13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> |
| 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
| 15 | * Bjorn Ekwall. <bj0rn@blox.se> |
| 16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU General Public License |
| 20 | * as published by the Free Software Foundation; either version |
| 21 | * 2 of the License, or (at your option) any later version. |
| 22 | * |
| 23 | * Moved to /usr/include/linux for NET3 |
| 24 | */ |
| 25 | #ifndef _LINUX_NETDEVICE_H |
| 26 | #define _LINUX_NETDEVICE_H |
| 27 | |
| 28 | #include <linux/pm_qos.h> |
| 29 | #include <linux/timer.h> |
| 30 | #include <linux/bug.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/atomic.h> |
| 33 | #include <asm/cache.h> |
| 34 | #include <asm/byteorder.h> |
| 35 | |
| 36 | #include <linux/percpu.h> |
| 37 | #include <linux/rculist.h> |
| 38 | #include <linux/dmaengine.h> |
| 39 | #include <linux/workqueue.h> |
| 40 | #include <linux/dynamic_queue_limits.h> |
| 41 | |
| 42 | #include <linux/ethtool.h> |
| 43 | #include <net/net_namespace.h> |
| 44 | #include <net/dsa.h> |
| 45 | #ifdef CONFIG_DCB |
| 46 | #include <net/dcbnl.h> |
| 47 | #endif |
| 48 | #include <net/netprio_cgroup.h> |
| 49 | |
| 50 | #include <linux/netdev_features.h> |
| 51 | #include <linux/neighbour.h> |
| 52 | #include <uapi/linux/netdevice.h> |
| 53 | |
| 54 | struct netpoll_info; |
| 55 | struct device; |
| 56 | struct phy_device; |
| 57 | /* 802.11 specific */ |
| 58 | struct wireless_dev; |
| 59 | /* source back-compat hooks */ |
| 60 | #define SET_ETHTOOL_OPS(netdev,ops) \ |
| 61 | ( (netdev)->ethtool_ops = (ops) ) |
| 62 | |
| 63 | extern void netdev_set_default_ethtool_ops(struct net_device *dev, |
| 64 | const struct ethtool_ops *ops); |
| 65 | |
| 66 | /* hardware address assignment types */ |
| 67 | #define NET_ADDR_PERM 0 /* address is permanent (default) */ |
| 68 | #define NET_ADDR_RANDOM 1 /* address is generated randomly */ |
| 69 | #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ |
| 70 | #define NET_ADDR_SET 3 /* address is set using |
| 71 | * dev_set_mac_address() */ |
| 72 | |
| 73 | /* Backlog congestion levels */ |
| 74 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
| 75 | #define NET_RX_DROP 1 /* packet dropped */ |
| 76 | |
| 77 | /* |
| 78 | * Transmit return codes: transmit return codes originate from three different |
| 79 | * namespaces: |
| 80 | * |
| 81 | * - qdisc return codes |
| 82 | * - driver transmit return codes |
| 83 | * - errno values |
| 84 | * |
| 85 | * Drivers are allowed to return any one of those in their hard_start_xmit() |
| 86 | * function. Real network devices commonly used with qdiscs should only return |
| 87 | * the driver transmit return codes though - when qdiscs are used, the actual |
| 88 | * transmission happens asynchronously, so the value is not propagated to |
| 89 | * higher layers. Virtual network devices transmit synchronously, in this case |
| 90 | * the driver transmit return codes are consumed by dev_queue_xmit(), all |
| 91 | * others are propagated to higher layers. |
| 92 | */ |
| 93 | |
| 94 | /* qdisc ->enqueue() return codes. */ |
| 95 | #define NET_XMIT_SUCCESS 0x00 |
| 96 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
| 97 | #define NET_XMIT_CN 0x02 /* congestion notification */ |
| 98 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ |
| 99 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
| 100 | |
| 101 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
| 102 | * indicates that the device will soon be dropping packets, or already drops |
| 103 | * some packets of the same priority; prompting us to send less aggressively. */ |
| 104 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
| 105 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
| 106 | |
| 107 | /* Driver transmit return codes */ |
| 108 | #define NETDEV_TX_MASK 0xf0 |
| 109 | |
| 110 | enum netdev_tx { |
| 111 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
| 112 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
| 113 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ |
| 114 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ |
| 115 | }; |
| 116 | typedef enum netdev_tx netdev_tx_t; |
| 117 | |
| 118 | /* |
| 119 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; |
| 120 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. |
| 121 | */ |
| 122 | static inline bool dev_xmit_complete(int rc) |
| 123 | { |
| 124 | /* |
| 125 | * Positive cases with an skb consumed by a driver: |
| 126 | * - successful transmission (rc == NETDEV_TX_OK) |
| 127 | * - error while transmitting (rc < 0) |
| 128 | * - error while queueing to a different device (rc & NET_XMIT_MASK) |
| 129 | */ |
| 130 | if (likely(rc < NET_XMIT_MASK)) |
| 131 | return true; |
| 132 | |
| 133 | return false; |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * Compute the worst case header length according to the protocols |
| 138 | * used. |
| 139 | */ |
| 140 | |
| 141 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
| 142 | # if defined(CONFIG_MAC80211_MESH) |
| 143 | # define LL_MAX_HEADER 128 |
| 144 | # else |
| 145 | # define LL_MAX_HEADER 96 |
| 146 | # endif |
| 147 | #else |
| 148 | # define LL_MAX_HEADER 32 |
| 149 | #endif |
| 150 | |
| 151 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
| 152 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) |
| 153 | #define MAX_HEADER LL_MAX_HEADER |
| 154 | #else |
| 155 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
| 156 | #endif |
| 157 | |
| 158 | /* |
| 159 | * Old network device statistics. Fields are native words |
| 160 | * (unsigned long) so they can be read and written atomically. |
| 161 | */ |
| 162 | |
| 163 | struct net_device_stats { |
| 164 | unsigned long rx_packets; |
| 165 | unsigned long tx_packets; |
| 166 | unsigned long rx_bytes; |
| 167 | unsigned long tx_bytes; |
| 168 | unsigned long rx_errors; |
| 169 | unsigned long tx_errors; |
| 170 | unsigned long rx_dropped; |
| 171 | unsigned long tx_dropped; |
| 172 | unsigned long multicast; |
| 173 | unsigned long collisions; |
| 174 | unsigned long rx_length_errors; |
| 175 | unsigned long rx_over_errors; |
| 176 | unsigned long rx_crc_errors; |
| 177 | unsigned long rx_frame_errors; |
| 178 | unsigned long rx_fifo_errors; |
| 179 | unsigned long rx_missed_errors; |
| 180 | unsigned long tx_aborted_errors; |
| 181 | unsigned long tx_carrier_errors; |
| 182 | unsigned long tx_fifo_errors; |
| 183 | unsigned long tx_heartbeat_errors; |
| 184 | unsigned long tx_window_errors; |
| 185 | unsigned long rx_compressed; |
| 186 | unsigned long tx_compressed; |
| 187 | }; |
| 188 | |
| 189 | |
| 190 | #include <linux/cache.h> |
| 191 | #include <linux/skbuff.h> |
| 192 | |
| 193 | #ifdef CONFIG_RPS |
| 194 | #include <linux/static_key.h> |
| 195 | extern struct static_key rps_needed; |
| 196 | #endif |
| 197 | |
| 198 | struct neighbour; |
| 199 | struct neigh_parms; |
| 200 | struct sk_buff; |
| 201 | |
| 202 | struct netdev_hw_addr { |
| 203 | struct list_head list; |
| 204 | unsigned char addr[MAX_ADDR_LEN]; |
| 205 | unsigned char type; |
| 206 | #define NETDEV_HW_ADDR_T_LAN 1 |
| 207 | #define NETDEV_HW_ADDR_T_SAN 2 |
| 208 | #define NETDEV_HW_ADDR_T_SLAVE 3 |
| 209 | #define NETDEV_HW_ADDR_T_UNICAST 4 |
| 210 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
| 211 | bool global_use; |
| 212 | int sync_cnt; |
| 213 | int refcount; |
| 214 | int synced; |
| 215 | struct rcu_head rcu_head; |
| 216 | }; |
| 217 | |
| 218 | struct netdev_hw_addr_list { |
| 219 | struct list_head list; |
| 220 | int count; |
| 221 | }; |
| 222 | |
| 223 | #define netdev_hw_addr_list_count(l) ((l)->count) |
| 224 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) |
| 225 | #define netdev_hw_addr_list_for_each(ha, l) \ |
| 226 | list_for_each_entry(ha, &(l)->list, list) |
| 227 | |
| 228 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
| 229 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) |
| 230 | #define netdev_for_each_uc_addr(ha, dev) \ |
| 231 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) |
| 232 | |
| 233 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
| 234 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) |
| 235 | #define netdev_for_each_mc_addr(ha, dev) \ |
| 236 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
| 237 | |
| 238 | struct hh_cache { |
| 239 | u16 hh_len; |
| 240 | u16 __pad; |
| 241 | seqlock_t hh_lock; |
| 242 | |
| 243 | /* cached hardware header; allow for machine alignment needs. */ |
| 244 | #define HH_DATA_MOD 16 |
| 245 | #define HH_DATA_OFF(__len) \ |
| 246 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
| 247 | #define HH_DATA_ALIGN(__len) \ |
| 248 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
| 249 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
| 250 | }; |
| 251 | |
| 252 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
| 253 | * Alternative is: |
| 254 | * dev->hard_header_len ? (dev->hard_header_len + |
| 255 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
| 256 | * |
| 257 | * We could use other alignment values, but we must maintain the |
| 258 | * relationship HH alignment <= LL alignment. |
| 259 | */ |
| 260 | #define LL_RESERVED_SPACE(dev) \ |
| 261 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| 262 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
| 263 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| 264 | |
| 265 | struct header_ops { |
| 266 | int (*create) (struct sk_buff *skb, struct net_device *dev, |
| 267 | unsigned short type, const void *daddr, |
| 268 | const void *saddr, unsigned int len); |
| 269 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
| 270 | int (*rebuild)(struct sk_buff *skb); |
| 271 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
| 272 | void (*cache_update)(struct hh_cache *hh, |
| 273 | const struct net_device *dev, |
| 274 | const unsigned char *haddr); |
| 275 | }; |
| 276 | |
| 277 | /* These flag bits are private to the generic network queueing |
| 278 | * layer, they may not be explicitly referenced by any other |
| 279 | * code. |
| 280 | */ |
| 281 | |
| 282 | enum netdev_state_t { |
| 283 | __LINK_STATE_START, |
| 284 | __LINK_STATE_PRESENT, |
| 285 | __LINK_STATE_NOCARRIER, |
| 286 | __LINK_STATE_LINKWATCH_PENDING, |
| 287 | __LINK_STATE_DORMANT, |
| 288 | }; |
| 289 | |
| 290 | |
| 291 | /* |
| 292 | * This structure holds at boot time configured netdevice settings. They |
| 293 | * are then used in the device probing. |
| 294 | */ |
| 295 | struct netdev_boot_setup { |
| 296 | char name[IFNAMSIZ]; |
| 297 | struct ifmap map; |
| 298 | }; |
| 299 | #define NETDEV_BOOT_SETUP_MAX 8 |
| 300 | |
| 301 | extern int __init netdev_boot_setup(char *str); |
| 302 | |
| 303 | /* |
| 304 | * Structure for NAPI scheduling similar to tasklet but with weighting |
| 305 | */ |
| 306 | struct napi_struct { |
| 307 | /* The poll_list must only be managed by the entity which |
| 308 | * changes the state of the NAPI_STATE_SCHED bit. This means |
| 309 | * whoever atomically sets that bit can add this napi_struct |
| 310 | * to the per-cpu poll_list, and whoever clears that bit |
| 311 | * can remove from the list right before clearing the bit. |
| 312 | */ |
| 313 | struct list_head poll_list; |
| 314 | |
| 315 | unsigned long state; |
| 316 | int weight; |
| 317 | unsigned int gro_count; |
| 318 | int (*poll)(struct napi_struct *, int); |
| 319 | #ifdef CONFIG_NETPOLL |
| 320 | spinlock_t poll_lock; |
| 321 | int poll_owner; |
| 322 | #endif |
| 323 | struct net_device *dev; |
| 324 | struct sk_buff *gro_list; |
| 325 | struct sk_buff *skb; |
| 326 | struct list_head dev_list; |
| 327 | }; |
| 328 | |
| 329 | enum { |
| 330 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
| 331 | NAPI_STATE_DISABLE, /* Disable pending */ |
| 332 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
| 333 | }; |
| 334 | |
| 335 | enum gro_result { |
| 336 | GRO_MERGED, |
| 337 | GRO_MERGED_FREE, |
| 338 | GRO_HELD, |
| 339 | GRO_NORMAL, |
| 340 | GRO_DROP, |
| 341 | }; |
| 342 | typedef enum gro_result gro_result_t; |
| 343 | |
| 344 | /* |
| 345 | * enum rx_handler_result - Possible return values for rx_handlers. |
| 346 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it |
| 347 | * further. |
| 348 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in |
| 349 | * case skb->dev was changed by rx_handler. |
| 350 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. |
| 351 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. |
| 352 | * |
| 353 | * rx_handlers are functions called from inside __netif_receive_skb(), to do |
| 354 | * special processing of the skb, prior to delivery to protocol handlers. |
| 355 | * |
| 356 | * Currently, a net_device can only have a single rx_handler registered. Trying |
| 357 | * to register a second rx_handler will return -EBUSY. |
| 358 | * |
| 359 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). |
| 360 | * To unregister a rx_handler on a net_device, use |
| 361 | * netdev_rx_handler_unregister(). |
| 362 | * |
| 363 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to |
| 364 | * do with the skb. |
| 365 | * |
| 366 | * If the rx_handler consumed to skb in some way, it should return |
| 367 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
| 368 | * the skb to be delivered in some other ways. |
| 369 | * |
| 370 | * If the rx_handler changed skb->dev, to divert the skb to another |
| 371 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the |
| 372 | * new device will be called if it exists. |
| 373 | * |
| 374 | * If the rx_handler consider the skb should be ignored, it should return |
| 375 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
| 376 | * are registered on exact device (ptype->dev == skb->dev). |
| 377 | * |
| 378 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally |
| 379 | * delivered, it should return RX_HANDLER_PASS. |
| 380 | * |
| 381 | * A device without a registered rx_handler will behave as if rx_handler |
| 382 | * returned RX_HANDLER_PASS. |
| 383 | */ |
| 384 | |
| 385 | enum rx_handler_result { |
| 386 | RX_HANDLER_CONSUMED, |
| 387 | RX_HANDLER_ANOTHER, |
| 388 | RX_HANDLER_EXACT, |
| 389 | RX_HANDLER_PASS, |
| 390 | }; |
| 391 | typedef enum rx_handler_result rx_handler_result_t; |
| 392 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); |
| 393 | |
| 394 | extern void __napi_schedule(struct napi_struct *n); |
| 395 | |
| 396 | static inline bool napi_disable_pending(struct napi_struct *n) |
| 397 | { |
| 398 | return test_bit(NAPI_STATE_DISABLE, &n->state); |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * napi_schedule_prep - check if napi can be scheduled |
| 403 | * @n: napi context |
| 404 | * |
| 405 | * Test if NAPI routine is already running, and if not mark |
| 406 | * it as running. This is used as a condition variable |
| 407 | * insure only one NAPI poll instance runs. We also make |
| 408 | * sure there is no pending NAPI disable. |
| 409 | */ |
| 410 | static inline bool napi_schedule_prep(struct napi_struct *n) |
| 411 | { |
| 412 | return !napi_disable_pending(n) && |
| 413 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * napi_schedule - schedule NAPI poll |
| 418 | * @n: napi context |
| 419 | * |
| 420 | * Schedule NAPI poll routine to be called if it is not already |
| 421 | * running. |
| 422 | */ |
| 423 | static inline void napi_schedule(struct napi_struct *n) |
| 424 | { |
| 425 | if (napi_schedule_prep(n)) |
| 426 | __napi_schedule(n); |
| 427 | } |
| 428 | |
| 429 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
| 430 | static inline bool napi_reschedule(struct napi_struct *napi) |
| 431 | { |
| 432 | if (napi_schedule_prep(napi)) { |
| 433 | __napi_schedule(napi); |
| 434 | return true; |
| 435 | } |
| 436 | return false; |
| 437 | } |
| 438 | |
| 439 | /** |
| 440 | * napi_complete - NAPI processing complete |
| 441 | * @n: napi context |
| 442 | * |
| 443 | * Mark NAPI processing as complete. |
| 444 | */ |
| 445 | extern void __napi_complete(struct napi_struct *n); |
| 446 | extern void napi_complete(struct napi_struct *n); |
| 447 | |
| 448 | /** |
| 449 | * napi_disable - prevent NAPI from scheduling |
| 450 | * @n: napi context |
| 451 | * |
| 452 | * Stop NAPI from being scheduled on this context. |
| 453 | * Waits till any outstanding processing completes. |
| 454 | */ |
| 455 | static inline void napi_disable(struct napi_struct *n) |
| 456 | { |
| 457 | set_bit(NAPI_STATE_DISABLE, &n->state); |
| 458 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
| 459 | msleep(1); |
| 460 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * napi_enable - enable NAPI scheduling |
| 465 | * @n: napi context |
| 466 | * |
| 467 | * Resume NAPI from being scheduled on this context. |
| 468 | * Must be paired with napi_disable. |
| 469 | */ |
| 470 | static inline void napi_enable(struct napi_struct *n) |
| 471 | { |
| 472 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); |
| 473 | smp_mb__before_clear_bit(); |
| 474 | clear_bit(NAPI_STATE_SCHED, &n->state); |
| 475 | } |
| 476 | |
| 477 | #ifdef CONFIG_SMP |
| 478 | /** |
| 479 | * napi_synchronize - wait until NAPI is not running |
| 480 | * @n: napi context |
| 481 | * |
| 482 | * Wait until NAPI is done being scheduled on this context. |
| 483 | * Waits till any outstanding processing completes but |
| 484 | * does not disable future activations. |
| 485 | */ |
| 486 | static inline void napi_synchronize(const struct napi_struct *n) |
| 487 | { |
| 488 | while (test_bit(NAPI_STATE_SCHED, &n->state)) |
| 489 | msleep(1); |
| 490 | } |
| 491 | #else |
| 492 | # define napi_synchronize(n) barrier() |
| 493 | #endif |
| 494 | |
| 495 | enum netdev_queue_state_t { |
| 496 | __QUEUE_STATE_DRV_XOFF, |
| 497 | __QUEUE_STATE_STACK_XOFF, |
| 498 | __QUEUE_STATE_FROZEN, |
| 499 | #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
| 500 | (1 << __QUEUE_STATE_STACK_XOFF)) |
| 501 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ |
| 502 | (1 << __QUEUE_STATE_FROZEN)) |
| 503 | }; |
| 504 | /* |
| 505 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The |
| 506 | * netif_tx_* functions below are used to manipulate this flag. The |
| 507 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit |
| 508 | * queue independently. The netif_xmit_*stopped functions below are called |
| 509 | * to check if the queue has been stopped by the driver or stack (either |
| 510 | * of the XOFF bits are set in the state). Drivers should not need to call |
| 511 | * netif_xmit*stopped functions, they should only be using netif_tx_*. |
| 512 | */ |
| 513 | |
| 514 | struct netdev_queue { |
| 515 | /* |
| 516 | * read mostly part |
| 517 | */ |
| 518 | struct net_device *dev; |
| 519 | struct Qdisc *qdisc; |
| 520 | struct Qdisc *qdisc_sleeping; |
| 521 | #ifdef CONFIG_SYSFS |
| 522 | struct kobject kobj; |
| 523 | #endif |
| 524 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| 525 | int numa_node; |
| 526 | #endif |
| 527 | /* |
| 528 | * write mostly part |
| 529 | */ |
| 530 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
| 531 | int xmit_lock_owner; |
| 532 | /* |
| 533 | * please use this field instead of dev->trans_start |
| 534 | */ |
| 535 | unsigned long trans_start; |
| 536 | |
| 537 | /* |
| 538 | * Number of TX timeouts for this queue |
| 539 | * (/sys/class/net/DEV/Q/trans_timeout) |
| 540 | */ |
| 541 | unsigned long trans_timeout; |
| 542 | |
| 543 | unsigned long state; |
| 544 | |
| 545 | #ifdef CONFIG_BQL |
| 546 | struct dql dql; |
| 547 | #endif |
| 548 | } ____cacheline_aligned_in_smp; |
| 549 | |
| 550 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
| 551 | { |
| 552 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| 553 | return q->numa_node; |
| 554 | #else |
| 555 | return NUMA_NO_NODE; |
| 556 | #endif |
| 557 | } |
| 558 | |
| 559 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) |
| 560 | { |
| 561 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| 562 | q->numa_node = node; |
| 563 | #endif |
| 564 | } |
| 565 | |
| 566 | #ifdef CONFIG_RPS |
| 567 | /* |
| 568 | * This structure holds an RPS map which can be of variable length. The |
| 569 | * map is an array of CPUs. |
| 570 | */ |
| 571 | struct rps_map { |
| 572 | unsigned int len; |
| 573 | struct rcu_head rcu; |
| 574 | u16 cpus[0]; |
| 575 | }; |
| 576 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
| 577 | |
| 578 | /* |
| 579 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
| 580 | * tail pointer for that CPU's input queue at the time of last enqueue, and |
| 581 | * a hardware filter index. |
| 582 | */ |
| 583 | struct rps_dev_flow { |
| 584 | u16 cpu; |
| 585 | u16 filter; |
| 586 | unsigned int last_qtail; |
| 587 | }; |
| 588 | #define RPS_NO_FILTER 0xffff |
| 589 | |
| 590 | /* |
| 591 | * The rps_dev_flow_table structure contains a table of flow mappings. |
| 592 | */ |
| 593 | struct rps_dev_flow_table { |
| 594 | unsigned int mask; |
| 595 | struct rcu_head rcu; |
| 596 | struct rps_dev_flow flows[0]; |
| 597 | }; |
| 598 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ |
| 599 | ((_num) * sizeof(struct rps_dev_flow))) |
| 600 | |
| 601 | /* |
| 602 | * The rps_sock_flow_table contains mappings of flows to the last CPU |
| 603 | * on which they were processed by the application (set in recvmsg). |
| 604 | */ |
| 605 | struct rps_sock_flow_table { |
| 606 | unsigned int mask; |
| 607 | u16 ents[0]; |
| 608 | }; |
| 609 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ |
| 610 | ((_num) * sizeof(u16))) |
| 611 | |
| 612 | #define RPS_NO_CPU 0xffff |
| 613 | |
| 614 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
| 615 | u32 hash) |
| 616 | { |
| 617 | if (table && hash) { |
| 618 | unsigned int cpu, index = hash & table->mask; |
| 619 | |
| 620 | /* We only give a hint, preemption can change cpu under us */ |
| 621 | cpu = raw_smp_processor_id(); |
| 622 | |
| 623 | if (table->ents[index] != cpu) |
| 624 | table->ents[index] = cpu; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, |
| 629 | u32 hash) |
| 630 | { |
| 631 | if (table && hash) |
| 632 | table->ents[hash & table->mask] = RPS_NO_CPU; |
| 633 | } |
| 634 | |
| 635 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
| 636 | |
| 637 | #ifdef CONFIG_RFS_ACCEL |
| 638 | extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, |
| 639 | u32 flow_id, u16 filter_id); |
| 640 | #endif |
| 641 | |
| 642 | /* This structure contains an instance of an RX queue. */ |
| 643 | struct netdev_rx_queue { |
| 644 | struct rps_map __rcu *rps_map; |
| 645 | struct rps_dev_flow_table __rcu *rps_flow_table; |
| 646 | struct kobject kobj; |
| 647 | struct net_device *dev; |
| 648 | } ____cacheline_aligned_in_smp; |
| 649 | #endif /* CONFIG_RPS */ |
| 650 | |
| 651 | #ifdef CONFIG_XPS |
| 652 | /* |
| 653 | * This structure holds an XPS map which can be of variable length. The |
| 654 | * map is an array of queues. |
| 655 | */ |
| 656 | struct xps_map { |
| 657 | unsigned int len; |
| 658 | unsigned int alloc_len; |
| 659 | struct rcu_head rcu; |
| 660 | u16 queues[0]; |
| 661 | }; |
| 662 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
| 663 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
| 664 | / sizeof(u16)) |
| 665 | |
| 666 | /* |
| 667 | * This structure holds all XPS maps for device. Maps are indexed by CPU. |
| 668 | */ |
| 669 | struct xps_dev_maps { |
| 670 | struct rcu_head rcu; |
| 671 | struct xps_map __rcu *cpu_map[0]; |
| 672 | }; |
| 673 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ |
| 674 | (nr_cpu_ids * sizeof(struct xps_map *))) |
| 675 | #endif /* CONFIG_XPS */ |
| 676 | |
| 677 | #define TC_MAX_QUEUE 16 |
| 678 | #define TC_BITMASK 15 |
| 679 | /* HW offloaded queuing disciplines txq count and offset maps */ |
| 680 | struct netdev_tc_txq { |
| 681 | u16 count; |
| 682 | u16 offset; |
| 683 | }; |
| 684 | |
| 685 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| 686 | /* |
| 687 | * This structure is to hold information about the device |
| 688 | * configured to run FCoE protocol stack. |
| 689 | */ |
| 690 | struct netdev_fcoe_hbainfo { |
| 691 | char manufacturer[64]; |
| 692 | char serial_number[64]; |
| 693 | char hardware_version[64]; |
| 694 | char driver_version[64]; |
| 695 | char optionrom_version[64]; |
| 696 | char firmware_version[64]; |
| 697 | char model[256]; |
| 698 | char model_description[256]; |
| 699 | }; |
| 700 | #endif |
| 701 | |
| 702 | /* |
| 703 | * This structure defines the management hooks for network devices. |
| 704 | * The following hooks can be defined; unless noted otherwise, they are |
| 705 | * optional and can be filled with a null pointer. |
| 706 | * |
| 707 | * int (*ndo_init)(struct net_device *dev); |
| 708 | * This function is called once when network device is registered. |
| 709 | * The network device can use this to any late stage initializaton |
| 710 | * or semantic validattion. It can fail with an error code which will |
| 711 | * be propogated back to register_netdev |
| 712 | * |
| 713 | * void (*ndo_uninit)(struct net_device *dev); |
| 714 | * This function is called when device is unregistered or when registration |
| 715 | * fails. It is not called if init fails. |
| 716 | * |
| 717 | * int (*ndo_open)(struct net_device *dev); |
| 718 | * This function is called when network device transistions to the up |
| 719 | * state. |
| 720 | * |
| 721 | * int (*ndo_stop)(struct net_device *dev); |
| 722 | * This function is called when network device transistions to the down |
| 723 | * state. |
| 724 | * |
| 725 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
| 726 | * struct net_device *dev); |
| 727 | * Called when a packet needs to be transmitted. |
| 728 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
| 729 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) |
| 730 | * Required can not be NULL. |
| 731 | * |
| 732 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); |
| 733 | * Called to decide which queue to when device supports multiple |
| 734 | * transmit queues. |
| 735 | * |
| 736 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
| 737 | * This function is called to allow device receiver to make |
| 738 | * changes to configuration when multicast or promiscious is enabled. |
| 739 | * |
| 740 | * void (*ndo_set_rx_mode)(struct net_device *dev); |
| 741 | * This function is called device changes address list filtering. |
| 742 | * If driver handles unicast address filtering, it should set |
| 743 | * IFF_UNICAST_FLT to its priv_flags. |
| 744 | * |
| 745 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); |
| 746 | * This function is called when the Media Access Control address |
| 747 | * needs to be changed. If this interface is not defined, the |
| 748 | * mac address can not be changed. |
| 749 | * |
| 750 | * int (*ndo_validate_addr)(struct net_device *dev); |
| 751 | * Test if Media Access Control address is valid for the device. |
| 752 | * |
| 753 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
| 754 | * Called when a user request an ioctl which can't be handled by |
| 755 | * the generic interface code. If not defined ioctl's return |
| 756 | * not supported error code. |
| 757 | * |
| 758 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); |
| 759 | * Used to set network devices bus interface parameters. This interface |
| 760 | * is retained for legacy reason, new devices should use the bus |
| 761 | * interface (PCI) for low level management. |
| 762 | * |
| 763 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); |
| 764 | * Called when a user wants to change the Maximum Transfer Unit |
| 765 | * of a device. If not defined, any request to change MTU will |
| 766 | * will return an error. |
| 767 | * |
| 768 | * void (*ndo_tx_timeout)(struct net_device *dev); |
| 769 | * Callback uses when the transmitter has not made any progress |
| 770 | * for dev->watchdog ticks. |
| 771 | * |
| 772 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
| 773 | * struct rtnl_link_stats64 *storage); |
| 774 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| 775 | * Called when a user wants to get the network device usage |
| 776 | * statistics. Drivers must do one of the following: |
| 777 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
| 778 | * rtnl_link_stats64 structure passed by the caller. |
| 779 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
| 780 | * (which should normally be dev->stats) and return a pointer to |
| 781 | * it. The structure may be changed asynchronously only if each |
| 782 | * field is written atomically. |
| 783 | * 3. Update dev->stats asynchronously and atomically, and define |
| 784 | * neither operation. |
| 785 | * |
| 786 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); |
| 787 | * If device support VLAN filtering this function is called when a |
| 788 | * VLAN id is registered. |
| 789 | * |
| 790 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
| 791 | * If device support VLAN filtering this function is called when a |
| 792 | * VLAN id is unregistered. |
| 793 | * |
| 794 | * void (*ndo_poll_controller)(struct net_device *dev); |
| 795 | * |
| 796 | * SR-IOV management functions. |
| 797 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); |
| 798 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); |
| 799 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); |
| 800 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
| 801 | * int (*ndo_get_vf_config)(struct net_device *dev, |
| 802 | * int vf, struct ifla_vf_info *ivf); |
| 803 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
| 804 | * struct nlattr *port[]); |
| 805 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
| 806 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
| 807 | * Called to setup 'tc' number of traffic classes in the net device. This |
| 808 | * is always called from the stack with the rtnl lock held and netif tx |
| 809 | * queues stopped. This allows the netdevice to perform queue management |
| 810 | * safely. |
| 811 | * |
| 812 | * Fiber Channel over Ethernet (FCoE) offload functions. |
| 813 | * int (*ndo_fcoe_enable)(struct net_device *dev); |
| 814 | * Called when the FCoE protocol stack wants to start using LLD for FCoE |
| 815 | * so the underlying device can perform whatever needed configuration or |
| 816 | * initialization to support acceleration of FCoE traffic. |
| 817 | * |
| 818 | * int (*ndo_fcoe_disable)(struct net_device *dev); |
| 819 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE |
| 820 | * so the underlying device can perform whatever needed clean-ups to |
| 821 | * stop supporting acceleration of FCoE traffic. |
| 822 | * |
| 823 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, |
| 824 | * struct scatterlist *sgl, unsigned int sgc); |
| 825 | * Called when the FCoE Initiator wants to initialize an I/O that |
| 826 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| 827 | * perform necessary setup and returns 1 to indicate the device is set up |
| 828 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
| 829 | * |
| 830 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); |
| 831 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as |
| 832 | * indicated by the FC exchange id 'xid', so the underlying device can |
| 833 | * clean up and reuse resources for later DDP requests. |
| 834 | * |
| 835 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, |
| 836 | * struct scatterlist *sgl, unsigned int sgc); |
| 837 | * Called when the FCoE Target wants to initialize an I/O that |
| 838 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| 839 | * perform necessary setup and returns 1 to indicate the device is set up |
| 840 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
| 841 | * |
| 842 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| 843 | * struct netdev_fcoe_hbainfo *hbainfo); |
| 844 | * Called when the FCoE Protocol stack wants information on the underlying |
| 845 | * device. This information is utilized by the FCoE protocol stack to |
| 846 | * register attributes with Fiber Channel management service as per the |
| 847 | * FC-GS Fabric Device Management Information(FDMI) specification. |
| 848 | * |
| 849 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
| 850 | * Called when the underlying device wants to override default World Wide |
| 851 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own |
| 852 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE |
| 853 | * protocol stack to use. |
| 854 | * |
| 855 | * RFS acceleration. |
| 856 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, |
| 857 | * u16 rxq_index, u32 flow_id); |
| 858 | * Set hardware filter for RFS. rxq_index is the target queue index; |
| 859 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. |
| 860 | * Return the filter ID on success, or a negative error code. |
| 861 | * |
| 862 | * Slave management functions (for bridge, bonding, etc). |
| 863 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
| 864 | * Called to make another netdev an underling. |
| 865 | * |
| 866 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); |
| 867 | * Called to release previously enslaved netdev. |
| 868 | * |
| 869 | * Feature/offload setting functions. |
| 870 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
| 871 | * netdev_features_t features); |
| 872 | * Adjusts the requested feature flags according to device-specific |
| 873 | * constraints, and returns the resulting flags. Must not modify |
| 874 | * the device state. |
| 875 | * |
| 876 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
| 877 | * Called to update device configuration to new features. Passed |
| 878 | * feature set might be less than what was returned by ndo_fix_features()). |
| 879 | * Must return >0 or -errno if it changed dev->features itself. |
| 880 | * |
| 881 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
| 882 | * struct net_device *dev, |
| 883 | * const unsigned char *addr, u16 flags) |
| 884 | * Adds an FDB entry to dev for addr. |
| 885 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
| 886 | * struct net_device *dev, |
| 887 | * const unsigned char *addr) |
| 888 | * Deletes the FDB entry from dev coresponding to addr. |
| 889 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, |
| 890 | * struct net_device *dev, int idx) |
| 891 | * Used to add FDB entries to dump requests. Implementers should add |
| 892 | * entries to skb and update idx with the number of entries. |
| 893 | * |
| 894 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh) |
| 895 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
| 896 | * struct net_device *dev, u32 filter_mask) |
| 897 | * |
| 898 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); |
| 899 | * Called to change device carrier. Soft-devices (like dummy, team, etc) |
| 900 | * which do not represent real hardware may define this to allow their |
| 901 | * userspace components to manage their virtual carrier state. Devices |
| 902 | * that determine carrier state from physical hardware properties (eg |
| 903 | * network cables) or protocol-dependent mechanisms (eg |
| 904 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. |
| 905 | */ |
| 906 | struct net_device_ops { |
| 907 | int (*ndo_init)(struct net_device *dev); |
| 908 | void (*ndo_uninit)(struct net_device *dev); |
| 909 | int (*ndo_open)(struct net_device *dev); |
| 910 | int (*ndo_stop)(struct net_device *dev); |
| 911 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
| 912 | struct net_device *dev); |
| 913 | u16 (*ndo_select_queue)(struct net_device *dev, |
| 914 | struct sk_buff *skb); |
| 915 | void (*ndo_change_rx_flags)(struct net_device *dev, |
| 916 | int flags); |
| 917 | void (*ndo_set_rx_mode)(struct net_device *dev); |
| 918 | int (*ndo_set_mac_address)(struct net_device *dev, |
| 919 | void *addr); |
| 920 | int (*ndo_validate_addr)(struct net_device *dev); |
| 921 | int (*ndo_do_ioctl)(struct net_device *dev, |
| 922 | struct ifreq *ifr, int cmd); |
| 923 | int (*ndo_set_config)(struct net_device *dev, |
| 924 | struct ifmap *map); |
| 925 | int (*ndo_change_mtu)(struct net_device *dev, |
| 926 | int new_mtu); |
| 927 | int (*ndo_neigh_setup)(struct net_device *dev, |
| 928 | struct neigh_parms *); |
| 929 | void (*ndo_tx_timeout) (struct net_device *dev); |
| 930 | |
| 931 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
| 932 | struct rtnl_link_stats64 *storage); |
| 933 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| 934 | |
| 935 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
| 936 | __be16 proto, u16 vid); |
| 937 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
| 938 | __be16 proto, u16 vid); |
| 939 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 940 | void (*ndo_poll_controller)(struct net_device *dev); |
| 941 | int (*ndo_netpoll_setup)(struct net_device *dev, |
| 942 | struct netpoll_info *info, |
| 943 | gfp_t gfp); |
| 944 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
| 945 | #endif |
| 946 | int (*ndo_set_vf_mac)(struct net_device *dev, |
| 947 | int queue, u8 *mac); |
| 948 | int (*ndo_set_vf_vlan)(struct net_device *dev, |
| 949 | int queue, u16 vlan, u8 qos); |
| 950 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, |
| 951 | int vf, int rate); |
| 952 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
| 953 | int vf, bool setting); |
| 954 | int (*ndo_get_vf_config)(struct net_device *dev, |
| 955 | int vf, |
| 956 | struct ifla_vf_info *ivf); |
| 957 | int (*ndo_set_vf_port)(struct net_device *dev, |
| 958 | int vf, |
| 959 | struct nlattr *port[]); |
| 960 | int (*ndo_get_vf_port)(struct net_device *dev, |
| 961 | int vf, struct sk_buff *skb); |
| 962 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
| 963 | #if IS_ENABLED(CONFIG_FCOE) |
| 964 | int (*ndo_fcoe_enable)(struct net_device *dev); |
| 965 | int (*ndo_fcoe_disable)(struct net_device *dev); |
| 966 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
| 967 | u16 xid, |
| 968 | struct scatterlist *sgl, |
| 969 | unsigned int sgc); |
| 970 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, |
| 971 | u16 xid); |
| 972 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
| 973 | u16 xid, |
| 974 | struct scatterlist *sgl, |
| 975 | unsigned int sgc); |
| 976 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| 977 | struct netdev_fcoe_hbainfo *hbainfo); |
| 978 | #endif |
| 979 | |
| 980 | #if IS_ENABLED(CONFIG_LIBFCOE) |
| 981 | #define NETDEV_FCOE_WWNN 0 |
| 982 | #define NETDEV_FCOE_WWPN 1 |
| 983 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
| 984 | u64 *wwn, int type); |
| 985 | #endif |
| 986 | |
| 987 | #ifdef CONFIG_RFS_ACCEL |
| 988 | int (*ndo_rx_flow_steer)(struct net_device *dev, |
| 989 | const struct sk_buff *skb, |
| 990 | u16 rxq_index, |
| 991 | u32 flow_id); |
| 992 | #endif |
| 993 | int (*ndo_add_slave)(struct net_device *dev, |
| 994 | struct net_device *slave_dev); |
| 995 | int (*ndo_del_slave)(struct net_device *dev, |
| 996 | struct net_device *slave_dev); |
| 997 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
| 998 | netdev_features_t features); |
| 999 | int (*ndo_set_features)(struct net_device *dev, |
| 1000 | netdev_features_t features); |
| 1001 | int (*ndo_neigh_construct)(struct neighbour *n); |
| 1002 | void (*ndo_neigh_destroy)(struct neighbour *n); |
| 1003 | |
| 1004 | int (*ndo_fdb_add)(struct ndmsg *ndm, |
| 1005 | struct nlattr *tb[], |
| 1006 | struct net_device *dev, |
| 1007 | const unsigned char *addr, |
| 1008 | u16 flags); |
| 1009 | int (*ndo_fdb_del)(struct ndmsg *ndm, |
| 1010 | struct nlattr *tb[], |
| 1011 | struct net_device *dev, |
| 1012 | const unsigned char *addr); |
| 1013 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
| 1014 | struct netlink_callback *cb, |
| 1015 | struct net_device *dev, |
| 1016 | int idx); |
| 1017 | |
| 1018 | int (*ndo_bridge_setlink)(struct net_device *dev, |
| 1019 | struct nlmsghdr *nlh); |
| 1020 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
| 1021 | u32 pid, u32 seq, |
| 1022 | struct net_device *dev, |
| 1023 | u32 filter_mask); |
| 1024 | int (*ndo_bridge_dellink)(struct net_device *dev, |
| 1025 | struct nlmsghdr *nlh); |
| 1026 | int (*ndo_change_carrier)(struct net_device *dev, |
| 1027 | bool new_carrier); |
| 1028 | }; |
| 1029 | |
| 1030 | /* |
| 1031 | * The DEVICE structure. |
| 1032 | * Actually, this whole structure is a big mistake. It mixes I/O |
| 1033 | * data with strictly "high-level" data, and it has to know about |
| 1034 | * almost every data structure used in the INET module. |
| 1035 | * |
| 1036 | * FIXME: cleanup struct net_device such that network protocol info |
| 1037 | * moves out. |
| 1038 | */ |
| 1039 | |
| 1040 | struct net_device { |
| 1041 | |
| 1042 | /* |
| 1043 | * This is the first field of the "visible" part of this structure |
| 1044 | * (i.e. as seen by users in the "Space.c" file). It is the name |
| 1045 | * of the interface. |
| 1046 | */ |
| 1047 | char name[IFNAMSIZ]; |
| 1048 | |
| 1049 | /* device name hash chain, please keep it close to name[] */ |
| 1050 | struct hlist_node name_hlist; |
| 1051 | |
| 1052 | /* snmp alias */ |
| 1053 | char *ifalias; |
| 1054 | |
| 1055 | /* |
| 1056 | * I/O specific fields |
| 1057 | * FIXME: Merge these and struct ifmap into one |
| 1058 | */ |
| 1059 | unsigned long mem_end; /* shared mem end */ |
| 1060 | unsigned long mem_start; /* shared mem start */ |
| 1061 | unsigned long base_addr; /* device I/O address */ |
| 1062 | unsigned int irq; /* device IRQ number */ |
| 1063 | |
| 1064 | /* |
| 1065 | * Some hardware also needs these fields, but they are not |
| 1066 | * part of the usual set specified in Space.c. |
| 1067 | */ |
| 1068 | |
| 1069 | unsigned long state; |
| 1070 | |
| 1071 | struct list_head dev_list; |
| 1072 | struct list_head napi_list; |
| 1073 | struct list_head unreg_list; |
| 1074 | struct list_head upper_dev_list; /* List of upper devices */ |
| 1075 | |
| 1076 | |
| 1077 | /* currently active device features */ |
| 1078 | netdev_features_t features; |
| 1079 | /* user-changeable features */ |
| 1080 | netdev_features_t hw_features; |
| 1081 | /* user-requested features */ |
| 1082 | netdev_features_t wanted_features; |
| 1083 | /* mask of features inheritable by VLAN devices */ |
| 1084 | netdev_features_t vlan_features; |
| 1085 | /* mask of features inherited by encapsulating devices |
| 1086 | * This field indicates what encapsulation offloads |
| 1087 | * the hardware is capable of doing, and drivers will |
| 1088 | * need to set them appropriately. |
| 1089 | */ |
| 1090 | netdev_features_t hw_enc_features; |
| 1091 | |
| 1092 | /* Interface index. Unique device identifier */ |
| 1093 | int ifindex; |
| 1094 | int iflink; |
| 1095 | |
| 1096 | struct net_device_stats stats; |
| 1097 | atomic_long_t rx_dropped; /* dropped packets by core network |
| 1098 | * Do not use this in drivers. |
| 1099 | */ |
| 1100 | |
| 1101 | #ifdef CONFIG_WIRELESS_EXT |
| 1102 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
| 1103 | * See <net/iw_handler.h> for details. Jean II */ |
| 1104 | const struct iw_handler_def * wireless_handlers; |
| 1105 | /* Instance data managed by the core of Wireless Extensions. */ |
| 1106 | struct iw_public_data * wireless_data; |
| 1107 | #endif |
| 1108 | /* Management operations */ |
| 1109 | const struct net_device_ops *netdev_ops; |
| 1110 | const struct ethtool_ops *ethtool_ops; |
| 1111 | |
| 1112 | /* Hardware header description */ |
| 1113 | const struct header_ops *header_ops; |
| 1114 | |
| 1115 | unsigned int flags; /* interface flags (a la BSD) */ |
| 1116 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
| 1117 | * See if.h for definitions. */ |
| 1118 | unsigned short gflags; |
| 1119 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
| 1120 | |
| 1121 | unsigned char operstate; /* RFC2863 operstate */ |
| 1122 | unsigned char link_mode; /* mapping policy to operstate */ |
| 1123 | |
| 1124 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
| 1125 | unsigned char dma; /* DMA channel */ |
| 1126 | |
| 1127 | unsigned int mtu; /* interface MTU value */ |
| 1128 | unsigned short type; /* interface hardware type */ |
| 1129 | unsigned short hard_header_len; /* hardware hdr length */ |
| 1130 | |
| 1131 | /* extra head- and tailroom the hardware may need, but not in all cases |
| 1132 | * can this be guaranteed, especially tailroom. Some cases also use |
| 1133 | * LL_MAX_HEADER instead to allocate the skb. |
| 1134 | */ |
| 1135 | unsigned short needed_headroom; |
| 1136 | unsigned short needed_tailroom; |
| 1137 | |
| 1138 | /* Interface address info. */ |
| 1139 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
| 1140 | unsigned char addr_assign_type; /* hw address assignment type */ |
| 1141 | unsigned char addr_len; /* hardware address length */ |
| 1142 | unsigned char neigh_priv_len; |
| 1143 | unsigned short dev_id; /* for shared network cards */ |
| 1144 | |
| 1145 | spinlock_t addr_list_lock; |
| 1146 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
| 1147 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ |
| 1148 | struct netdev_hw_addr_list dev_addrs; /* list of device |
| 1149 | * hw addresses |
| 1150 | */ |
| 1151 | #ifdef CONFIG_SYSFS |
| 1152 | struct kset *queues_kset; |
| 1153 | #endif |
| 1154 | |
| 1155 | bool uc_promisc; |
| 1156 | unsigned int promiscuity; |
| 1157 | unsigned int allmulti; |
| 1158 | |
| 1159 | |
| 1160 | /* Protocol specific pointers */ |
| 1161 | |
| 1162 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
| 1163 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
| 1164 | #endif |
| 1165 | #if IS_ENABLED(CONFIG_NET_DSA) |
| 1166 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
| 1167 | #endif |
| 1168 | void *atalk_ptr; /* AppleTalk link */ |
| 1169 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
| 1170 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
| 1171 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
| 1172 | void *ax25_ptr; /* AX.25 specific data */ |
| 1173 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
| 1174 | assign before registering */ |
| 1175 | |
| 1176 | /* |
| 1177 | * Cache lines mostly used on receive path (including eth_type_trans()) |
| 1178 | */ |
| 1179 | unsigned long last_rx; /* Time of last Rx |
| 1180 | * This should not be set in |
| 1181 | * drivers, unless really needed, |
| 1182 | * because network stack (bonding) |
| 1183 | * use it if/when necessary, to |
| 1184 | * avoid dirtying this cache line. |
| 1185 | */ |
| 1186 | |
| 1187 | /* Interface address info used in eth_type_trans() */ |
| 1188 | unsigned char *dev_addr; /* hw address, (before bcast |
| 1189 | because most packets are |
| 1190 | unicast) */ |
| 1191 | |
| 1192 | |
| 1193 | #ifdef CONFIG_RPS |
| 1194 | struct netdev_rx_queue *_rx; |
| 1195 | |
| 1196 | /* Number of RX queues allocated at register_netdev() time */ |
| 1197 | unsigned int num_rx_queues; |
| 1198 | |
| 1199 | /* Number of RX queues currently active in device */ |
| 1200 | unsigned int real_num_rx_queues; |
| 1201 | |
| 1202 | #endif |
| 1203 | |
| 1204 | rx_handler_func_t __rcu *rx_handler; |
| 1205 | void __rcu *rx_handler_data; |
| 1206 | |
| 1207 | struct netdev_queue __rcu *ingress_queue; |
| 1208 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
| 1209 | |
| 1210 | |
| 1211 | /* |
| 1212 | * Cache lines mostly used on transmit path |
| 1213 | */ |
| 1214 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
| 1215 | |
| 1216 | /* Number of TX queues allocated at alloc_netdev_mq() time */ |
| 1217 | unsigned int num_tx_queues; |
| 1218 | |
| 1219 | /* Number of TX queues currently active in device */ |
| 1220 | unsigned int real_num_tx_queues; |
| 1221 | |
| 1222 | /* root qdisc from userspace point of view */ |
| 1223 | struct Qdisc *qdisc; |
| 1224 | |
| 1225 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
| 1226 | spinlock_t tx_global_lock; |
| 1227 | |
| 1228 | #ifdef CONFIG_XPS |
| 1229 | struct xps_dev_maps __rcu *xps_maps; |
| 1230 | #endif |
| 1231 | #ifdef CONFIG_RFS_ACCEL |
| 1232 | /* CPU reverse-mapping for RX completion interrupts, indexed |
| 1233 | * by RX queue number. Assigned by driver. This must only be |
| 1234 | * set if the ndo_rx_flow_steer operation is defined. */ |
| 1235 | struct cpu_rmap *rx_cpu_rmap; |
| 1236 | #endif |
| 1237 | |
| 1238 | /* These may be needed for future network-power-down code. */ |
| 1239 | |
| 1240 | /* |
| 1241 | * trans_start here is expensive for high speed devices on SMP, |
| 1242 | * please use netdev_queue->trans_start instead. |
| 1243 | */ |
| 1244 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
| 1245 | |
| 1246 | int watchdog_timeo; /* used by dev_watchdog() */ |
| 1247 | struct timer_list watchdog_timer; |
| 1248 | |
| 1249 | /* Number of references to this device */ |
| 1250 | int __percpu *pcpu_refcnt; |
| 1251 | |
| 1252 | /* delayed register/unregister */ |
| 1253 | struct list_head todo_list; |
| 1254 | /* device index hash chain */ |
| 1255 | struct hlist_node index_hlist; |
| 1256 | |
| 1257 | struct list_head link_watch_list; |
| 1258 | |
| 1259 | /* register/unregister state machine */ |
| 1260 | enum { NETREG_UNINITIALIZED=0, |
| 1261 | NETREG_REGISTERED, /* completed register_netdevice */ |
| 1262 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
| 1263 | NETREG_UNREGISTERED, /* completed unregister todo */ |
| 1264 | NETREG_RELEASED, /* called free_netdev */ |
| 1265 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
| 1266 | } reg_state:8; |
| 1267 | |
| 1268 | bool dismantle; /* device is going do be freed */ |
| 1269 | |
| 1270 | enum { |
| 1271 | RTNL_LINK_INITIALIZED, |
| 1272 | RTNL_LINK_INITIALIZING, |
| 1273 | } rtnl_link_state:16; |
| 1274 | |
| 1275 | /* Called from unregister, can be used to call free_netdev */ |
| 1276 | void (*destructor)(struct net_device *dev); |
| 1277 | |
| 1278 | #ifdef CONFIG_NETPOLL |
| 1279 | struct netpoll_info __rcu *npinfo; |
| 1280 | #endif |
| 1281 | |
| 1282 | #ifdef CONFIG_NET_NS |
| 1283 | /* Network namespace this network device is inside */ |
| 1284 | struct net *nd_net; |
| 1285 | #endif |
| 1286 | |
| 1287 | /* mid-layer private */ |
| 1288 | union { |
| 1289 | void *ml_priv; |
| 1290 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ |
| 1291 | struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
| 1292 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
| 1293 | struct pcpu_vstats __percpu *vstats; /* veth stats */ |
| 1294 | }; |
| 1295 | /* GARP */ |
| 1296 | struct garp_port __rcu *garp_port; |
| 1297 | /* MRP */ |
| 1298 | struct mrp_port __rcu *mrp_port; |
| 1299 | |
| 1300 | /* class/net/name entry */ |
| 1301 | struct device dev; |
| 1302 | /* space for optional device, statistics, and wireless sysfs groups */ |
| 1303 | const struct attribute_group *sysfs_groups[4]; |
| 1304 | |
| 1305 | /* rtnetlink link ops */ |
| 1306 | const struct rtnl_link_ops *rtnl_link_ops; |
| 1307 | |
| 1308 | /* for setting kernel sock attribute on TCP connection setup */ |
| 1309 | #define GSO_MAX_SIZE 65536 |
| 1310 | unsigned int gso_max_size; |
| 1311 | #define GSO_MAX_SEGS 65535 |
| 1312 | u16 gso_max_segs; |
| 1313 | |
| 1314 | #ifdef CONFIG_DCB |
| 1315 | /* Data Center Bridging netlink ops */ |
| 1316 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
| 1317 | #endif |
| 1318 | u8 num_tc; |
| 1319 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; |
| 1320 | u8 prio_tc_map[TC_BITMASK + 1]; |
| 1321 | |
| 1322 | #if IS_ENABLED(CONFIG_FCOE) |
| 1323 | /* max exchange id for FCoE LRO by ddp */ |
| 1324 | unsigned int fcoe_ddp_xid; |
| 1325 | #endif |
| 1326 | #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) |
| 1327 | struct netprio_map __rcu *priomap; |
| 1328 | #endif |
| 1329 | /* phy device may attach itself for hardware timestamping */ |
| 1330 | struct phy_device *phydev; |
| 1331 | |
| 1332 | struct lock_class_key *qdisc_tx_busylock; |
| 1333 | |
| 1334 | /* group the device belongs to */ |
| 1335 | int group; |
| 1336 | |
| 1337 | struct pm_qos_request pm_qos_req; |
| 1338 | }; |
| 1339 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
| 1340 | |
| 1341 | #define NETDEV_ALIGN 32 |
| 1342 | |
| 1343 | static inline |
| 1344 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) |
| 1345 | { |
| 1346 | return dev->prio_tc_map[prio & TC_BITMASK]; |
| 1347 | } |
| 1348 | |
| 1349 | static inline |
| 1350 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) |
| 1351 | { |
| 1352 | if (tc >= dev->num_tc) |
| 1353 | return -EINVAL; |
| 1354 | |
| 1355 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; |
| 1356 | return 0; |
| 1357 | } |
| 1358 | |
| 1359 | static inline |
| 1360 | void netdev_reset_tc(struct net_device *dev) |
| 1361 | { |
| 1362 | dev->num_tc = 0; |
| 1363 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); |
| 1364 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); |
| 1365 | } |
| 1366 | |
| 1367 | static inline |
| 1368 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) |
| 1369 | { |
| 1370 | if (tc >= dev->num_tc) |
| 1371 | return -EINVAL; |
| 1372 | |
| 1373 | dev->tc_to_txq[tc].count = count; |
| 1374 | dev->tc_to_txq[tc].offset = offset; |
| 1375 | return 0; |
| 1376 | } |
| 1377 | |
| 1378 | static inline |
| 1379 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) |
| 1380 | { |
| 1381 | if (num_tc > TC_MAX_QUEUE) |
| 1382 | return -EINVAL; |
| 1383 | |
| 1384 | dev->num_tc = num_tc; |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
| 1388 | static inline |
| 1389 | int netdev_get_num_tc(struct net_device *dev) |
| 1390 | { |
| 1391 | return dev->num_tc; |
| 1392 | } |
| 1393 | |
| 1394 | static inline |
| 1395 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, |
| 1396 | unsigned int index) |
| 1397 | { |
| 1398 | return &dev->_tx[index]; |
| 1399 | } |
| 1400 | |
| 1401 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
| 1402 | void (*f)(struct net_device *, |
| 1403 | struct netdev_queue *, |
| 1404 | void *), |
| 1405 | void *arg) |
| 1406 | { |
| 1407 | unsigned int i; |
| 1408 | |
| 1409 | for (i = 0; i < dev->num_tx_queues; i++) |
| 1410 | f(dev, &dev->_tx[i], arg); |
| 1411 | } |
| 1412 | |
| 1413 | extern struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
| 1414 | struct sk_buff *skb); |
| 1415 | extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); |
| 1416 | |
| 1417 | /* |
| 1418 | * Net namespace inlines |
| 1419 | */ |
| 1420 | static inline |
| 1421 | struct net *dev_net(const struct net_device *dev) |
| 1422 | { |
| 1423 | return read_pnet(&dev->nd_net); |
| 1424 | } |
| 1425 | |
| 1426 | static inline |
| 1427 | void dev_net_set(struct net_device *dev, struct net *net) |
| 1428 | { |
| 1429 | #ifdef CONFIG_NET_NS |
| 1430 | release_net(dev->nd_net); |
| 1431 | dev->nd_net = hold_net(net); |
| 1432 | #endif |
| 1433 | } |
| 1434 | |
| 1435 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
| 1436 | { |
| 1437 | #ifdef CONFIG_NET_DSA_TAG_DSA |
| 1438 | if (dev->dsa_ptr != NULL) |
| 1439 | return dsa_uses_dsa_tags(dev->dsa_ptr); |
| 1440 | #endif |
| 1441 | |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
| 1446 | { |
| 1447 | #ifdef CONFIG_NET_DSA_TAG_TRAILER |
| 1448 | if (dev->dsa_ptr != NULL) |
| 1449 | return dsa_uses_trailer_tags(dev->dsa_ptr); |
| 1450 | #endif |
| 1451 | |
| 1452 | return 0; |
| 1453 | } |
| 1454 | |
| 1455 | /** |
| 1456 | * netdev_priv - access network device private data |
| 1457 | * @dev: network device |
| 1458 | * |
| 1459 | * Get network device private data |
| 1460 | */ |
| 1461 | static inline void *netdev_priv(const struct net_device *dev) |
| 1462 | { |
| 1463 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
| 1464 | } |
| 1465 | |
| 1466 | /* Set the sysfs physical device reference for the network logical device |
| 1467 | * if set prior to registration will cause a symlink during initialization. |
| 1468 | */ |
| 1469 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
| 1470 | |
| 1471 | /* Set the sysfs device type for the network logical device to allow |
| 1472 | * fin grained indentification of different network device types. For |
| 1473 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
| 1474 | */ |
| 1475 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) |
| 1476 | |
| 1477 | /* Default NAPI poll() weight |
| 1478 | * Device drivers are strongly advised to not use bigger value |
| 1479 | */ |
| 1480 | #define NAPI_POLL_WEIGHT 64 |
| 1481 | |
| 1482 | /** |
| 1483 | * netif_napi_add - initialize a napi context |
| 1484 | * @dev: network device |
| 1485 | * @napi: napi context |
| 1486 | * @poll: polling function |
| 1487 | * @weight: default weight |
| 1488 | * |
| 1489 | * netif_napi_add() must be used to initialize a napi context prior to calling |
| 1490 | * *any* of the other napi related functions. |
| 1491 | */ |
| 1492 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
| 1493 | int (*poll)(struct napi_struct *, int), int weight); |
| 1494 | |
| 1495 | /** |
| 1496 | * netif_napi_del - remove a napi context |
| 1497 | * @napi: napi context |
| 1498 | * |
| 1499 | * netif_napi_del() removes a napi context from the network device napi list |
| 1500 | */ |
| 1501 | void netif_napi_del(struct napi_struct *napi); |
| 1502 | |
| 1503 | struct napi_gro_cb { |
| 1504 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
| 1505 | void *frag0; |
| 1506 | |
| 1507 | /* Length of frag0. */ |
| 1508 | unsigned int frag0_len; |
| 1509 | |
| 1510 | /* This indicates where we are processing relative to skb->data. */ |
| 1511 | int data_offset; |
| 1512 | |
| 1513 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
| 1514 | int flush; |
| 1515 | |
| 1516 | /* Number of segments aggregated. */ |
| 1517 | u16 count; |
| 1518 | |
| 1519 | /* This is non-zero if the packet may be of the same flow. */ |
| 1520 | u8 same_flow; |
| 1521 | |
| 1522 | /* Free the skb? */ |
| 1523 | u8 free; |
| 1524 | #define NAPI_GRO_FREE 1 |
| 1525 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 |
| 1526 | |
| 1527 | /* jiffies when first packet was created/queued */ |
| 1528 | unsigned long age; |
| 1529 | |
| 1530 | /* Used in ipv6_gro_receive() */ |
| 1531 | int proto; |
| 1532 | |
| 1533 | /* used in skb_gro_receive() slow path */ |
| 1534 | struct sk_buff *last; |
| 1535 | }; |
| 1536 | |
| 1537 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) |
| 1538 | |
| 1539 | struct packet_type { |
| 1540 | __be16 type; /* This is really htons(ether_type). */ |
| 1541 | struct net_device *dev; /* NULL is wildcarded here */ |
| 1542 | int (*func) (struct sk_buff *, |
| 1543 | struct net_device *, |
| 1544 | struct packet_type *, |
| 1545 | struct net_device *); |
| 1546 | bool (*id_match)(struct packet_type *ptype, |
| 1547 | struct sock *sk); |
| 1548 | void *af_packet_priv; |
| 1549 | struct list_head list; |
| 1550 | }; |
| 1551 | |
| 1552 | struct offload_callbacks { |
| 1553 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
| 1554 | netdev_features_t features); |
| 1555 | int (*gso_send_check)(struct sk_buff *skb); |
| 1556 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
| 1557 | struct sk_buff *skb); |
| 1558 | int (*gro_complete)(struct sk_buff *skb); |
| 1559 | }; |
| 1560 | |
| 1561 | struct packet_offload { |
| 1562 | __be16 type; /* This is really htons(ether_type). */ |
| 1563 | struct offload_callbacks callbacks; |
| 1564 | struct list_head list; |
| 1565 | }; |
| 1566 | |
| 1567 | #include <linux/notifier.h> |
| 1568 | |
| 1569 | /* netdevice notifier chain. Please remember to update the rtnetlink |
| 1570 | * notification exclusion list in rtnetlink_event() when adding new |
| 1571 | * types. |
| 1572 | */ |
| 1573 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ |
| 1574 | #define NETDEV_DOWN 0x0002 |
| 1575 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface |
| 1576 | detected a hardware crash and restarted |
| 1577 | - we can use this eg to kick tcp sessions |
| 1578 | once done */ |
| 1579 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ |
| 1580 | #define NETDEV_REGISTER 0x0005 |
| 1581 | #define NETDEV_UNREGISTER 0x0006 |
| 1582 | #define NETDEV_CHANGEMTU 0x0007 |
| 1583 | #define NETDEV_CHANGEADDR 0x0008 |
| 1584 | #define NETDEV_GOING_DOWN 0x0009 |
| 1585 | #define NETDEV_CHANGENAME 0x000A |
| 1586 | #define NETDEV_FEAT_CHANGE 0x000B |
| 1587 | #define NETDEV_BONDING_FAILOVER 0x000C |
| 1588 | #define NETDEV_PRE_UP 0x000D |
| 1589 | #define NETDEV_PRE_TYPE_CHANGE 0x000E |
| 1590 | #define NETDEV_POST_TYPE_CHANGE 0x000F |
| 1591 | #define NETDEV_POST_INIT 0x0010 |
| 1592 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
| 1593 | #define NETDEV_RELEASE 0x0012 |
| 1594 | #define NETDEV_NOTIFY_PEERS 0x0013 |
| 1595 | #define NETDEV_JOIN 0x0014 |
| 1596 | |
| 1597 | extern int register_netdevice_notifier(struct notifier_block *nb); |
| 1598 | extern int unregister_netdevice_notifier(struct notifier_block *nb); |
| 1599 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
| 1600 | |
| 1601 | |
| 1602 | extern rwlock_t dev_base_lock; /* Device list lock */ |
| 1603 | |
| 1604 | extern seqcount_t devnet_rename_seq; /* Device rename seq */ |
| 1605 | |
| 1606 | |
| 1607 | #define for_each_netdev(net, d) \ |
| 1608 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) |
| 1609 | #define for_each_netdev_reverse(net, d) \ |
| 1610 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) |
| 1611 | #define for_each_netdev_rcu(net, d) \ |
| 1612 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) |
| 1613 | #define for_each_netdev_safe(net, d, n) \ |
| 1614 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) |
| 1615 | #define for_each_netdev_continue(net, d) \ |
| 1616 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) |
| 1617 | #define for_each_netdev_continue_rcu(net, d) \ |
| 1618 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) |
| 1619 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
| 1620 | for_each_netdev_rcu(&init_net, slave) \ |
| 1621 | if (netdev_master_upper_dev_get_rcu(slave) == bond) |
| 1622 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
| 1623 | |
| 1624 | static inline struct net_device *next_net_device(struct net_device *dev) |
| 1625 | { |
| 1626 | struct list_head *lh; |
| 1627 | struct net *net; |
| 1628 | |
| 1629 | net = dev_net(dev); |
| 1630 | lh = dev->dev_list.next; |
| 1631 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 1632 | } |
| 1633 | |
| 1634 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
| 1635 | { |
| 1636 | struct list_head *lh; |
| 1637 | struct net *net; |
| 1638 | |
| 1639 | net = dev_net(dev); |
| 1640 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
| 1641 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 1642 | } |
| 1643 | |
| 1644 | static inline struct net_device *first_net_device(struct net *net) |
| 1645 | { |
| 1646 | return list_empty(&net->dev_base_head) ? NULL : |
| 1647 | net_device_entry(net->dev_base_head.next); |
| 1648 | } |
| 1649 | |
| 1650 | static inline struct net_device *first_net_device_rcu(struct net *net) |
| 1651 | { |
| 1652 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); |
| 1653 | |
| 1654 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 1655 | } |
| 1656 | |
| 1657 | extern int netdev_boot_setup_check(struct net_device *dev); |
| 1658 | extern unsigned long netdev_boot_base(const char *prefix, int unit); |
| 1659 | extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
| 1660 | const char *hwaddr); |
| 1661 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
| 1662 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); |
| 1663 | extern void dev_add_pack(struct packet_type *pt); |
| 1664 | extern void dev_remove_pack(struct packet_type *pt); |
| 1665 | extern void __dev_remove_pack(struct packet_type *pt); |
| 1666 | extern void dev_add_offload(struct packet_offload *po); |
| 1667 | extern void dev_remove_offload(struct packet_offload *po); |
| 1668 | extern void __dev_remove_offload(struct packet_offload *po); |
| 1669 | |
| 1670 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
| 1671 | unsigned short mask); |
| 1672 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
| 1673 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
| 1674 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
| 1675 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
| 1676 | extern int dev_open(struct net_device *dev); |
| 1677 | extern int dev_close(struct net_device *dev); |
| 1678 | extern void dev_disable_lro(struct net_device *dev); |
| 1679 | extern int dev_loopback_xmit(struct sk_buff *newskb); |
| 1680 | extern int dev_queue_xmit(struct sk_buff *skb); |
| 1681 | extern int register_netdevice(struct net_device *dev); |
| 1682 | extern void unregister_netdevice_queue(struct net_device *dev, |
| 1683 | struct list_head *head); |
| 1684 | extern void unregister_netdevice_many(struct list_head *head); |
| 1685 | static inline void unregister_netdevice(struct net_device *dev) |
| 1686 | { |
| 1687 | unregister_netdevice_queue(dev, NULL); |
| 1688 | } |
| 1689 | |
| 1690 | extern int netdev_refcnt_read(const struct net_device *dev); |
| 1691 | extern void free_netdev(struct net_device *dev); |
| 1692 | extern void synchronize_net(void); |
| 1693 | extern int init_dummy_netdev(struct net_device *dev); |
| 1694 | |
| 1695 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
| 1696 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
| 1697 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
| 1698 | extern int netdev_get_name(struct net *net, char *name, int ifindex); |
| 1699 | extern int dev_restart(struct net_device *dev); |
| 1700 | #ifdef CONFIG_NETPOLL_TRAP |
| 1701 | extern int netpoll_trap(void); |
| 1702 | #endif |
| 1703 | extern int skb_gro_receive(struct sk_buff **head, |
| 1704 | struct sk_buff *skb); |
| 1705 | |
| 1706 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) |
| 1707 | { |
| 1708 | return NAPI_GRO_CB(skb)->data_offset; |
| 1709 | } |
| 1710 | |
| 1711 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) |
| 1712 | { |
| 1713 | return skb->len - NAPI_GRO_CB(skb)->data_offset; |
| 1714 | } |
| 1715 | |
| 1716 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) |
| 1717 | { |
| 1718 | NAPI_GRO_CB(skb)->data_offset += len; |
| 1719 | } |
| 1720 | |
| 1721 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
| 1722 | unsigned int offset) |
| 1723 | { |
| 1724 | return NAPI_GRO_CB(skb)->frag0 + offset; |
| 1725 | } |
| 1726 | |
| 1727 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
| 1728 | { |
| 1729 | return NAPI_GRO_CB(skb)->frag0_len < hlen; |
| 1730 | } |
| 1731 | |
| 1732 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
| 1733 | unsigned int offset) |
| 1734 | { |
| 1735 | if (!pskb_may_pull(skb, hlen)) |
| 1736 | return NULL; |
| 1737 | |
| 1738 | NAPI_GRO_CB(skb)->frag0 = NULL; |
| 1739 | NAPI_GRO_CB(skb)->frag0_len = 0; |
| 1740 | return skb->data + offset; |
| 1741 | } |
| 1742 | |
| 1743 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
| 1744 | { |
| 1745 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
| 1746 | } |
| 1747 | |
| 1748 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
| 1749 | { |
| 1750 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
| 1751 | skb_network_offset(skb); |
| 1752 | } |
| 1753 | |
| 1754 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
| 1755 | unsigned short type, |
| 1756 | const void *daddr, const void *saddr, |
| 1757 | unsigned int len) |
| 1758 | { |
| 1759 | if (!dev->header_ops || !dev->header_ops->create) |
| 1760 | return 0; |
| 1761 | |
| 1762 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
| 1763 | } |
| 1764 | |
| 1765 | static inline int dev_parse_header(const struct sk_buff *skb, |
| 1766 | unsigned char *haddr) |
| 1767 | { |
| 1768 | const struct net_device *dev = skb->dev; |
| 1769 | |
| 1770 | if (!dev->header_ops || !dev->header_ops->parse) |
| 1771 | return 0; |
| 1772 | return dev->header_ops->parse(skb, haddr); |
| 1773 | } |
| 1774 | |
| 1775 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
| 1776 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); |
| 1777 | static inline int unregister_gifconf(unsigned int family) |
| 1778 | { |
| 1779 | return register_gifconf(family, NULL); |
| 1780 | } |
| 1781 | |
| 1782 | /* |
| 1783 | * Incoming packets are placed on per-cpu queues |
| 1784 | */ |
| 1785 | struct softnet_data { |
| 1786 | struct Qdisc *output_queue; |
| 1787 | struct Qdisc **output_queue_tailp; |
| 1788 | struct list_head poll_list; |
| 1789 | struct sk_buff *completion_queue; |
| 1790 | struct sk_buff_head process_queue; |
| 1791 | |
| 1792 | /* stats */ |
| 1793 | unsigned int processed; |
| 1794 | unsigned int time_squeeze; |
| 1795 | unsigned int cpu_collision; |
| 1796 | unsigned int received_rps; |
| 1797 | |
| 1798 | #ifdef CONFIG_RPS |
| 1799 | struct softnet_data *rps_ipi_list; |
| 1800 | |
| 1801 | /* Elements below can be accessed between CPUs for RPS */ |
| 1802 | struct call_single_data csd ____cacheline_aligned_in_smp; |
| 1803 | struct softnet_data *rps_ipi_next; |
| 1804 | unsigned int cpu; |
| 1805 | unsigned int input_queue_head; |
| 1806 | unsigned int input_queue_tail; |
| 1807 | #endif |
| 1808 | unsigned int dropped; |
| 1809 | struct sk_buff_head input_pkt_queue; |
| 1810 | struct napi_struct backlog; |
| 1811 | }; |
| 1812 | |
| 1813 | static inline void input_queue_head_incr(struct softnet_data *sd) |
| 1814 | { |
| 1815 | #ifdef CONFIG_RPS |
| 1816 | sd->input_queue_head++; |
| 1817 | #endif |
| 1818 | } |
| 1819 | |
| 1820 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, |
| 1821 | unsigned int *qtail) |
| 1822 | { |
| 1823 | #ifdef CONFIG_RPS |
| 1824 | *qtail = ++sd->input_queue_tail; |
| 1825 | #endif |
| 1826 | } |
| 1827 | |
| 1828 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
| 1829 | |
| 1830 | extern void __netif_schedule(struct Qdisc *q); |
| 1831 | |
| 1832 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
| 1833 | { |
| 1834 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
| 1835 | __netif_schedule(txq->qdisc); |
| 1836 | } |
| 1837 | |
| 1838 | static inline void netif_tx_schedule_all(struct net_device *dev) |
| 1839 | { |
| 1840 | unsigned int i; |
| 1841 | |
| 1842 | for (i = 0; i < dev->num_tx_queues; i++) |
| 1843 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); |
| 1844 | } |
| 1845 | |
| 1846 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
| 1847 | { |
| 1848 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| 1849 | } |
| 1850 | |
| 1851 | /** |
| 1852 | * netif_start_queue - allow transmit |
| 1853 | * @dev: network device |
| 1854 | * |
| 1855 | * Allow upper layers to call the device hard_start_xmit routine. |
| 1856 | */ |
| 1857 | static inline void netif_start_queue(struct net_device *dev) |
| 1858 | { |
| 1859 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
| 1860 | } |
| 1861 | |
| 1862 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
| 1863 | { |
| 1864 | unsigned int i; |
| 1865 | |
| 1866 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 1867 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 1868 | netif_tx_start_queue(txq); |
| 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
| 1873 | { |
| 1874 | #ifdef CONFIG_NETPOLL_TRAP |
| 1875 | if (netpoll_trap()) { |
| 1876 | netif_tx_start_queue(dev_queue); |
| 1877 | return; |
| 1878 | } |
| 1879 | #endif |
| 1880 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
| 1881 | __netif_schedule(dev_queue->qdisc); |
| 1882 | } |
| 1883 | |
| 1884 | /** |
| 1885 | * netif_wake_queue - restart transmit |
| 1886 | * @dev: network device |
| 1887 | * |
| 1888 | * Allow upper layers to call the device hard_start_xmit routine. |
| 1889 | * Used for flow control when transmit resources are available. |
| 1890 | */ |
| 1891 | static inline void netif_wake_queue(struct net_device *dev) |
| 1892 | { |
| 1893 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
| 1894 | } |
| 1895 | |
| 1896 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
| 1897 | { |
| 1898 | unsigned int i; |
| 1899 | |
| 1900 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 1901 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 1902 | netif_tx_wake_queue(txq); |
| 1903 | } |
| 1904 | } |
| 1905 | |
| 1906 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
| 1907 | { |
| 1908 | if (WARN_ON(!dev_queue)) { |
| 1909 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
| 1910 | return; |
| 1911 | } |
| 1912 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| 1913 | } |
| 1914 | |
| 1915 | /** |
| 1916 | * netif_stop_queue - stop transmitted packets |
| 1917 | * @dev: network device |
| 1918 | * |
| 1919 | * Stop upper layers calling the device hard_start_xmit routine. |
| 1920 | * Used for flow control when transmit resources are unavailable. |
| 1921 | */ |
| 1922 | static inline void netif_stop_queue(struct net_device *dev) |
| 1923 | { |
| 1924 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
| 1925 | } |
| 1926 | |
| 1927 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
| 1928 | { |
| 1929 | unsigned int i; |
| 1930 | |
| 1931 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 1932 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 1933 | netif_tx_stop_queue(txq); |
| 1934 | } |
| 1935 | } |
| 1936 | |
| 1937 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
| 1938 | { |
| 1939 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| 1940 | } |
| 1941 | |
| 1942 | /** |
| 1943 | * netif_queue_stopped - test if transmit queue is flowblocked |
| 1944 | * @dev: network device |
| 1945 | * |
| 1946 | * Test if transmit queue on device is currently unable to send. |
| 1947 | */ |
| 1948 | static inline bool netif_queue_stopped(const struct net_device *dev) |
| 1949 | { |
| 1950 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
| 1951 | } |
| 1952 | |
| 1953 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
| 1954 | { |
| 1955 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
| 1956 | } |
| 1957 | |
| 1958 | static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
| 1959 | { |
| 1960 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; |
| 1961 | } |
| 1962 | |
| 1963 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
| 1964 | unsigned int bytes) |
| 1965 | { |
| 1966 | #ifdef CONFIG_BQL |
| 1967 | dql_queued(&dev_queue->dql, bytes); |
| 1968 | |
| 1969 | if (likely(dql_avail(&dev_queue->dql) >= 0)) |
| 1970 | return; |
| 1971 | |
| 1972 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
| 1973 | |
| 1974 | /* |
| 1975 | * The XOFF flag must be set before checking the dql_avail below, |
| 1976 | * because in netdev_tx_completed_queue we update the dql_completed |
| 1977 | * before checking the XOFF flag. |
| 1978 | */ |
| 1979 | smp_mb(); |
| 1980 | |
| 1981 | /* check again in case another CPU has just made room avail */ |
| 1982 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) |
| 1983 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
| 1984 | #endif |
| 1985 | } |
| 1986 | |
| 1987 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
| 1988 | { |
| 1989 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); |
| 1990 | } |
| 1991 | |
| 1992 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, |
| 1993 | unsigned int pkts, unsigned int bytes) |
| 1994 | { |
| 1995 | #ifdef CONFIG_BQL |
| 1996 | if (unlikely(!bytes)) |
| 1997 | return; |
| 1998 | |
| 1999 | dql_completed(&dev_queue->dql, bytes); |
| 2000 | |
| 2001 | /* |
| 2002 | * Without the memory barrier there is a small possiblity that |
| 2003 | * netdev_tx_sent_queue will miss the update and cause the queue to |
| 2004 | * be stopped forever |
| 2005 | */ |
| 2006 | smp_mb(); |
| 2007 | |
| 2008 | if (dql_avail(&dev_queue->dql) < 0) |
| 2009 | return; |
| 2010 | |
| 2011 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) |
| 2012 | netif_schedule_queue(dev_queue); |
| 2013 | #endif |
| 2014 | } |
| 2015 | |
| 2016 | static inline void netdev_completed_queue(struct net_device *dev, |
| 2017 | unsigned int pkts, unsigned int bytes) |
| 2018 | { |
| 2019 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); |
| 2020 | } |
| 2021 | |
| 2022 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) |
| 2023 | { |
| 2024 | #ifdef CONFIG_BQL |
| 2025 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
| 2026 | dql_reset(&q->dql); |
| 2027 | #endif |
| 2028 | } |
| 2029 | |
| 2030 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
| 2031 | { |
| 2032 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); |
| 2033 | } |
| 2034 | |
| 2035 | /** |
| 2036 | * netif_running - test if up |
| 2037 | * @dev: network device |
| 2038 | * |
| 2039 | * Test if the device has been brought up. |
| 2040 | */ |
| 2041 | static inline bool netif_running(const struct net_device *dev) |
| 2042 | { |
| 2043 | return test_bit(__LINK_STATE_START, &dev->state); |
| 2044 | } |
| 2045 | |
| 2046 | /* |
| 2047 | * Routines to manage the subqueues on a device. We only need start |
| 2048 | * stop, and a check if it's stopped. All other device management is |
| 2049 | * done at the overall netdevice level. |
| 2050 | * Also test the device if we're multiqueue. |
| 2051 | */ |
| 2052 | |
| 2053 | /** |
| 2054 | * netif_start_subqueue - allow sending packets on subqueue |
| 2055 | * @dev: network device |
| 2056 | * @queue_index: sub queue index |
| 2057 | * |
| 2058 | * Start individual transmit queue of a device with multiple transmit queues. |
| 2059 | */ |
| 2060 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
| 2061 | { |
| 2062 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
| 2063 | |
| 2064 | netif_tx_start_queue(txq); |
| 2065 | } |
| 2066 | |
| 2067 | /** |
| 2068 | * netif_stop_subqueue - stop sending packets on subqueue |
| 2069 | * @dev: network device |
| 2070 | * @queue_index: sub queue index |
| 2071 | * |
| 2072 | * Stop individual transmit queue of a device with multiple transmit queues. |
| 2073 | */ |
| 2074 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
| 2075 | { |
| 2076 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
| 2077 | #ifdef CONFIG_NETPOLL_TRAP |
| 2078 | if (netpoll_trap()) |
| 2079 | return; |
| 2080 | #endif |
| 2081 | netif_tx_stop_queue(txq); |
| 2082 | } |
| 2083 | |
| 2084 | /** |
| 2085 | * netif_subqueue_stopped - test status of subqueue |
| 2086 | * @dev: network device |
| 2087 | * @queue_index: sub queue index |
| 2088 | * |
| 2089 | * Check individual transmit queue of a device with multiple transmit queues. |
| 2090 | */ |
| 2091 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
| 2092 | u16 queue_index) |
| 2093 | { |
| 2094 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
| 2095 | |
| 2096 | return netif_tx_queue_stopped(txq); |
| 2097 | } |
| 2098 | |
| 2099 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
| 2100 | struct sk_buff *skb) |
| 2101 | { |
| 2102 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); |
| 2103 | } |
| 2104 | |
| 2105 | /** |
| 2106 | * netif_wake_subqueue - allow sending packets on subqueue |
| 2107 | * @dev: network device |
| 2108 | * @queue_index: sub queue index |
| 2109 | * |
| 2110 | * Resume individual transmit queue of a device with multiple transmit queues. |
| 2111 | */ |
| 2112 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
| 2113 | { |
| 2114 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
| 2115 | #ifdef CONFIG_NETPOLL_TRAP |
| 2116 | if (netpoll_trap()) |
| 2117 | return; |
| 2118 | #endif |
| 2119 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
| 2120 | __netif_schedule(txq->qdisc); |
| 2121 | } |
| 2122 | |
| 2123 | #ifdef CONFIG_XPS |
| 2124 | extern int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask, |
| 2125 | u16 index); |
| 2126 | #else |
| 2127 | static inline int netif_set_xps_queue(struct net_device *dev, |
| 2128 | struct cpumask *mask, |
| 2129 | u16 index) |
| 2130 | { |
| 2131 | return 0; |
| 2132 | } |
| 2133 | #endif |
| 2134 | |
| 2135 | /* |
| 2136 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used |
| 2137 | * as a distribution range limit for the returned value. |
| 2138 | */ |
| 2139 | static inline u16 skb_tx_hash(const struct net_device *dev, |
| 2140 | const struct sk_buff *skb) |
| 2141 | { |
| 2142 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); |
| 2143 | } |
| 2144 | |
| 2145 | /** |
| 2146 | * netif_is_multiqueue - test if device has multiple transmit queues |
| 2147 | * @dev: network device |
| 2148 | * |
| 2149 | * Check if device has multiple transmit queues |
| 2150 | */ |
| 2151 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
| 2152 | { |
| 2153 | return dev->num_tx_queues > 1; |
| 2154 | } |
| 2155 | |
| 2156 | extern int netif_set_real_num_tx_queues(struct net_device *dev, |
| 2157 | unsigned int txq); |
| 2158 | |
| 2159 | #ifdef CONFIG_RPS |
| 2160 | extern int netif_set_real_num_rx_queues(struct net_device *dev, |
| 2161 | unsigned int rxq); |
| 2162 | #else |
| 2163 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, |
| 2164 | unsigned int rxq) |
| 2165 | { |
| 2166 | return 0; |
| 2167 | } |
| 2168 | #endif |
| 2169 | |
| 2170 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
| 2171 | const struct net_device *from_dev) |
| 2172 | { |
| 2173 | int err; |
| 2174 | |
| 2175 | err = netif_set_real_num_tx_queues(to_dev, |
| 2176 | from_dev->real_num_tx_queues); |
| 2177 | if (err) |
| 2178 | return err; |
| 2179 | #ifdef CONFIG_RPS |
| 2180 | return netif_set_real_num_rx_queues(to_dev, |
| 2181 | from_dev->real_num_rx_queues); |
| 2182 | #else |
| 2183 | return 0; |
| 2184 | #endif |
| 2185 | } |
| 2186 | |
| 2187 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
| 2188 | extern int netif_get_num_default_rss_queues(void); |
| 2189 | |
| 2190 | /* Use this variant when it is known for sure that it |
| 2191 | * is executing from hardware interrupt context or with hardware interrupts |
| 2192 | * disabled. |
| 2193 | */ |
| 2194 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
| 2195 | |
| 2196 | /* Use this variant in places where it could be invoked |
| 2197 | * from either hardware interrupt or other context, with hardware interrupts |
| 2198 | * either disabled or enabled. |
| 2199 | */ |
| 2200 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
| 2201 | |
| 2202 | extern int netif_rx(struct sk_buff *skb); |
| 2203 | extern int netif_rx_ni(struct sk_buff *skb); |
| 2204 | extern int netif_receive_skb(struct sk_buff *skb); |
| 2205 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, |
| 2206 | struct sk_buff *skb); |
| 2207 | extern void napi_gro_flush(struct napi_struct *napi, bool flush_old); |
| 2208 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
| 2209 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
| 2210 | |
| 2211 | static inline void napi_free_frags(struct napi_struct *napi) |
| 2212 | { |
| 2213 | kfree_skb(napi->skb); |
| 2214 | napi->skb = NULL; |
| 2215 | } |
| 2216 | |
| 2217 | extern int netdev_rx_handler_register(struct net_device *dev, |
| 2218 | rx_handler_func_t *rx_handler, |
| 2219 | void *rx_handler_data); |
| 2220 | extern void netdev_rx_handler_unregister(struct net_device *dev); |
| 2221 | |
| 2222 | extern bool dev_valid_name(const char *name); |
| 2223 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
| 2224 | extern int dev_ethtool(struct net *net, struct ifreq *); |
| 2225 | extern unsigned int dev_get_flags(const struct net_device *); |
| 2226 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
| 2227 | extern int dev_change_flags(struct net_device *, unsigned int); |
| 2228 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
| 2229 | extern int dev_change_name(struct net_device *, const char *); |
| 2230 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
| 2231 | extern int dev_change_net_namespace(struct net_device *, |
| 2232 | struct net *, const char *); |
| 2233 | extern int dev_set_mtu(struct net_device *, int); |
| 2234 | extern void dev_set_group(struct net_device *, int); |
| 2235 | extern int dev_set_mac_address(struct net_device *, |
| 2236 | struct sockaddr *); |
| 2237 | extern int dev_change_carrier(struct net_device *, |
| 2238 | bool new_carrier); |
| 2239 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
| 2240 | struct net_device *dev, |
| 2241 | struct netdev_queue *txq); |
| 2242 | extern int dev_forward_skb(struct net_device *dev, |
| 2243 | struct sk_buff *skb); |
| 2244 | |
| 2245 | extern int netdev_budget; |
| 2246 | |
| 2247 | /* Called by rtnetlink.c:rtnl_unlock() */ |
| 2248 | extern void netdev_run_todo(void); |
| 2249 | |
| 2250 | /** |
| 2251 | * dev_put - release reference to device |
| 2252 | * @dev: network device |
| 2253 | * |
| 2254 | * Release reference to device to allow it to be freed. |
| 2255 | */ |
| 2256 | static inline void dev_put(struct net_device *dev) |
| 2257 | { |
| 2258 | this_cpu_dec(*dev->pcpu_refcnt); |
| 2259 | } |
| 2260 | |
| 2261 | /** |
| 2262 | * dev_hold - get reference to device |
| 2263 | * @dev: network device |
| 2264 | * |
| 2265 | * Hold reference to device to keep it from being freed. |
| 2266 | */ |
| 2267 | static inline void dev_hold(struct net_device *dev) |
| 2268 | { |
| 2269 | this_cpu_inc(*dev->pcpu_refcnt); |
| 2270 | } |
| 2271 | |
| 2272 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
| 2273 | * and _off may be called from IRQ context, but it is caller |
| 2274 | * who is responsible for serialization of these calls. |
| 2275 | * |
| 2276 | * The name carrier is inappropriate, these functions should really be |
| 2277 | * called netif_lowerlayer_*() because they represent the state of any |
| 2278 | * kind of lower layer not just hardware media. |
| 2279 | */ |
| 2280 | |
| 2281 | extern void linkwatch_init_dev(struct net_device *dev); |
| 2282 | extern void linkwatch_fire_event(struct net_device *dev); |
| 2283 | extern void linkwatch_forget_dev(struct net_device *dev); |
| 2284 | |
| 2285 | /** |
| 2286 | * netif_carrier_ok - test if carrier present |
| 2287 | * @dev: network device |
| 2288 | * |
| 2289 | * Check if carrier is present on device |
| 2290 | */ |
| 2291 | static inline bool netif_carrier_ok(const struct net_device *dev) |
| 2292 | { |
| 2293 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
| 2294 | } |
| 2295 | |
| 2296 | extern unsigned long dev_trans_start(struct net_device *dev); |
| 2297 | |
| 2298 | extern void __netdev_watchdog_up(struct net_device *dev); |
| 2299 | |
| 2300 | extern void netif_carrier_on(struct net_device *dev); |
| 2301 | |
| 2302 | extern void netif_carrier_off(struct net_device *dev); |
| 2303 | |
| 2304 | /** |
| 2305 | * netif_dormant_on - mark device as dormant. |
| 2306 | * @dev: network device |
| 2307 | * |
| 2308 | * Mark device as dormant (as per RFC2863). |
| 2309 | * |
| 2310 | * The dormant state indicates that the relevant interface is not |
| 2311 | * actually in a condition to pass packets (i.e., it is not 'up') but is |
| 2312 | * in a "pending" state, waiting for some external event. For "on- |
| 2313 | * demand" interfaces, this new state identifies the situation where the |
| 2314 | * interface is waiting for events to place it in the up state. |
| 2315 | * |
| 2316 | */ |
| 2317 | static inline void netif_dormant_on(struct net_device *dev) |
| 2318 | { |
| 2319 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 2320 | linkwatch_fire_event(dev); |
| 2321 | } |
| 2322 | |
| 2323 | /** |
| 2324 | * netif_dormant_off - set device as not dormant. |
| 2325 | * @dev: network device |
| 2326 | * |
| 2327 | * Device is not in dormant state. |
| 2328 | */ |
| 2329 | static inline void netif_dormant_off(struct net_device *dev) |
| 2330 | { |
| 2331 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 2332 | linkwatch_fire_event(dev); |
| 2333 | } |
| 2334 | |
| 2335 | /** |
| 2336 | * netif_dormant - test if carrier present |
| 2337 | * @dev: network device |
| 2338 | * |
| 2339 | * Check if carrier is present on device |
| 2340 | */ |
| 2341 | static inline bool netif_dormant(const struct net_device *dev) |
| 2342 | { |
| 2343 | return test_bit(__LINK_STATE_DORMANT, &dev->state); |
| 2344 | } |
| 2345 | |
| 2346 | |
| 2347 | /** |
| 2348 | * netif_oper_up - test if device is operational |
| 2349 | * @dev: network device |
| 2350 | * |
| 2351 | * Check if carrier is operational |
| 2352 | */ |
| 2353 | static inline bool netif_oper_up(const struct net_device *dev) |
| 2354 | { |
| 2355 | return (dev->operstate == IF_OPER_UP || |
| 2356 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
| 2357 | } |
| 2358 | |
| 2359 | /** |
| 2360 | * netif_device_present - is device available or removed |
| 2361 | * @dev: network device |
| 2362 | * |
| 2363 | * Check if device has not been removed from system. |
| 2364 | */ |
| 2365 | static inline bool netif_device_present(struct net_device *dev) |
| 2366 | { |
| 2367 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
| 2368 | } |
| 2369 | |
| 2370 | extern void netif_device_detach(struct net_device *dev); |
| 2371 | |
| 2372 | extern void netif_device_attach(struct net_device *dev); |
| 2373 | |
| 2374 | /* |
| 2375 | * Network interface message level settings |
| 2376 | */ |
| 2377 | |
| 2378 | enum { |
| 2379 | NETIF_MSG_DRV = 0x0001, |
| 2380 | NETIF_MSG_PROBE = 0x0002, |
| 2381 | NETIF_MSG_LINK = 0x0004, |
| 2382 | NETIF_MSG_TIMER = 0x0008, |
| 2383 | NETIF_MSG_IFDOWN = 0x0010, |
| 2384 | NETIF_MSG_IFUP = 0x0020, |
| 2385 | NETIF_MSG_RX_ERR = 0x0040, |
| 2386 | NETIF_MSG_TX_ERR = 0x0080, |
| 2387 | NETIF_MSG_TX_QUEUED = 0x0100, |
| 2388 | NETIF_MSG_INTR = 0x0200, |
| 2389 | NETIF_MSG_TX_DONE = 0x0400, |
| 2390 | NETIF_MSG_RX_STATUS = 0x0800, |
| 2391 | NETIF_MSG_PKTDATA = 0x1000, |
| 2392 | NETIF_MSG_HW = 0x2000, |
| 2393 | NETIF_MSG_WOL = 0x4000, |
| 2394 | }; |
| 2395 | |
| 2396 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
| 2397 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
| 2398 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
| 2399 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
| 2400 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
| 2401 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
| 2402 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
| 2403 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
| 2404 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
| 2405 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
| 2406 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
| 2407 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
| 2408 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
| 2409 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
| 2410 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
| 2411 | |
| 2412 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
| 2413 | { |
| 2414 | /* use default */ |
| 2415 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
| 2416 | return default_msg_enable_bits; |
| 2417 | if (debug_value == 0) /* no output */ |
| 2418 | return 0; |
| 2419 | /* set low N bits */ |
| 2420 | return (1 << debug_value) - 1; |
| 2421 | } |
| 2422 | |
| 2423 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
| 2424 | { |
| 2425 | spin_lock(&txq->_xmit_lock); |
| 2426 | txq->xmit_lock_owner = cpu; |
| 2427 | } |
| 2428 | |
| 2429 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
| 2430 | { |
| 2431 | spin_lock_bh(&txq->_xmit_lock); |
| 2432 | txq->xmit_lock_owner = smp_processor_id(); |
| 2433 | } |
| 2434 | |
| 2435 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
| 2436 | { |
| 2437 | bool ok = spin_trylock(&txq->_xmit_lock); |
| 2438 | if (likely(ok)) |
| 2439 | txq->xmit_lock_owner = smp_processor_id(); |
| 2440 | return ok; |
| 2441 | } |
| 2442 | |
| 2443 | static inline void __netif_tx_unlock(struct netdev_queue *txq) |
| 2444 | { |
| 2445 | txq->xmit_lock_owner = -1; |
| 2446 | spin_unlock(&txq->_xmit_lock); |
| 2447 | } |
| 2448 | |
| 2449 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) |
| 2450 | { |
| 2451 | txq->xmit_lock_owner = -1; |
| 2452 | spin_unlock_bh(&txq->_xmit_lock); |
| 2453 | } |
| 2454 | |
| 2455 | static inline void txq_trans_update(struct netdev_queue *txq) |
| 2456 | { |
| 2457 | if (txq->xmit_lock_owner != -1) |
| 2458 | txq->trans_start = jiffies; |
| 2459 | } |
| 2460 | |
| 2461 | /** |
| 2462 | * netif_tx_lock - grab network device transmit lock |
| 2463 | * @dev: network device |
| 2464 | * |
| 2465 | * Get network device transmit lock |
| 2466 | */ |
| 2467 | static inline void netif_tx_lock(struct net_device *dev) |
| 2468 | { |
| 2469 | unsigned int i; |
| 2470 | int cpu; |
| 2471 | |
| 2472 | spin_lock(&dev->tx_global_lock); |
| 2473 | cpu = smp_processor_id(); |
| 2474 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 2475 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 2476 | |
| 2477 | /* We are the only thread of execution doing a |
| 2478 | * freeze, but we have to grab the _xmit_lock in |
| 2479 | * order to synchronize with threads which are in |
| 2480 | * the ->hard_start_xmit() handler and already |
| 2481 | * checked the frozen bit. |
| 2482 | */ |
| 2483 | __netif_tx_lock(txq, cpu); |
| 2484 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
| 2485 | __netif_tx_unlock(txq); |
| 2486 | } |
| 2487 | } |
| 2488 | |
| 2489 | static inline void netif_tx_lock_bh(struct net_device *dev) |
| 2490 | { |
| 2491 | local_bh_disable(); |
| 2492 | netif_tx_lock(dev); |
| 2493 | } |
| 2494 | |
| 2495 | static inline void netif_tx_unlock(struct net_device *dev) |
| 2496 | { |
| 2497 | unsigned int i; |
| 2498 | |
| 2499 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 2500 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 2501 | |
| 2502 | /* No need to grab the _xmit_lock here. If the |
| 2503 | * queue is not stopped for another reason, we |
| 2504 | * force a schedule. |
| 2505 | */ |
| 2506 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); |
| 2507 | netif_schedule_queue(txq); |
| 2508 | } |
| 2509 | spin_unlock(&dev->tx_global_lock); |
| 2510 | } |
| 2511 | |
| 2512 | static inline void netif_tx_unlock_bh(struct net_device *dev) |
| 2513 | { |
| 2514 | netif_tx_unlock(dev); |
| 2515 | local_bh_enable(); |
| 2516 | } |
| 2517 | |
| 2518 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
| 2519 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
| 2520 | __netif_tx_lock(txq, cpu); \ |
| 2521 | } \ |
| 2522 | } |
| 2523 | |
| 2524 | #define HARD_TX_UNLOCK(dev, txq) { \ |
| 2525 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
| 2526 | __netif_tx_unlock(txq); \ |
| 2527 | } \ |
| 2528 | } |
| 2529 | |
| 2530 | static inline void netif_tx_disable(struct net_device *dev) |
| 2531 | { |
| 2532 | unsigned int i; |
| 2533 | int cpu; |
| 2534 | |
| 2535 | local_bh_disable(); |
| 2536 | cpu = smp_processor_id(); |
| 2537 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 2538 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 2539 | |
| 2540 | __netif_tx_lock(txq, cpu); |
| 2541 | netif_tx_stop_queue(txq); |
| 2542 | __netif_tx_unlock(txq); |
| 2543 | } |
| 2544 | local_bh_enable(); |
| 2545 | } |
| 2546 | |
| 2547 | static inline void netif_addr_lock(struct net_device *dev) |
| 2548 | { |
| 2549 | spin_lock(&dev->addr_list_lock); |
| 2550 | } |
| 2551 | |
| 2552 | static inline void netif_addr_lock_nested(struct net_device *dev) |
| 2553 | { |
| 2554 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); |
| 2555 | } |
| 2556 | |
| 2557 | static inline void netif_addr_lock_bh(struct net_device *dev) |
| 2558 | { |
| 2559 | spin_lock_bh(&dev->addr_list_lock); |
| 2560 | } |
| 2561 | |
| 2562 | static inline void netif_addr_unlock(struct net_device *dev) |
| 2563 | { |
| 2564 | spin_unlock(&dev->addr_list_lock); |
| 2565 | } |
| 2566 | |
| 2567 | static inline void netif_addr_unlock_bh(struct net_device *dev) |
| 2568 | { |
| 2569 | spin_unlock_bh(&dev->addr_list_lock); |
| 2570 | } |
| 2571 | |
| 2572 | /* |
| 2573 | * dev_addrs walker. Should be used only for read access. Call with |
| 2574 | * rcu_read_lock held. |
| 2575 | */ |
| 2576 | #define for_each_dev_addr(dev, ha) \ |
| 2577 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
| 2578 | |
| 2579 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
| 2580 | |
| 2581 | extern void ether_setup(struct net_device *dev); |
| 2582 | |
| 2583 | /* Support for loadable net-drivers */ |
| 2584 | extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
| 2585 | void (*setup)(struct net_device *), |
| 2586 | unsigned int txqs, unsigned int rxqs); |
| 2587 | #define alloc_netdev(sizeof_priv, name, setup) \ |
| 2588 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
| 2589 | |
| 2590 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ |
| 2591 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) |
| 2592 | |
| 2593 | extern int register_netdev(struct net_device *dev); |
| 2594 | extern void unregister_netdev(struct net_device *dev); |
| 2595 | |
| 2596 | /* General hardware address lists handling functions */ |
| 2597 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, |
| 2598 | struct netdev_hw_addr_list *from_list, |
| 2599 | int addr_len, unsigned char addr_type); |
| 2600 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
| 2601 | struct netdev_hw_addr_list *from_list, |
| 2602 | int addr_len, unsigned char addr_type); |
| 2603 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| 2604 | struct netdev_hw_addr_list *from_list, |
| 2605 | int addr_len); |
| 2606 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| 2607 | struct netdev_hw_addr_list *from_list, |
| 2608 | int addr_len); |
| 2609 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); |
| 2610 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); |
| 2611 | |
| 2612 | /* Functions used for device addresses handling */ |
| 2613 | extern int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
| 2614 | unsigned char addr_type); |
| 2615 | extern int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
| 2616 | unsigned char addr_type); |
| 2617 | extern int dev_addr_add_multiple(struct net_device *to_dev, |
| 2618 | struct net_device *from_dev, |
| 2619 | unsigned char addr_type); |
| 2620 | extern int dev_addr_del_multiple(struct net_device *to_dev, |
| 2621 | struct net_device *from_dev, |
| 2622 | unsigned char addr_type); |
| 2623 | extern void dev_addr_flush(struct net_device *dev); |
| 2624 | extern int dev_addr_init(struct net_device *dev); |
| 2625 | |
| 2626 | /* Functions used for unicast addresses handling */ |
| 2627 | extern int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
| 2628 | extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); |
| 2629 | extern int dev_uc_del(struct net_device *dev, const unsigned char *addr); |
| 2630 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); |
| 2631 | extern int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); |
| 2632 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); |
| 2633 | extern void dev_uc_flush(struct net_device *dev); |
| 2634 | extern void dev_uc_init(struct net_device *dev); |
| 2635 | |
| 2636 | /* Functions used for multicast addresses handling */ |
| 2637 | extern int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
| 2638 | extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); |
| 2639 | extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); |
| 2640 | extern int dev_mc_del(struct net_device *dev, const unsigned char *addr); |
| 2641 | extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); |
| 2642 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
| 2643 | extern int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); |
| 2644 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); |
| 2645 | extern void dev_mc_flush(struct net_device *dev); |
| 2646 | extern void dev_mc_init(struct net_device *dev); |
| 2647 | |
| 2648 | /* Functions used for secondary unicast and multicast support */ |
| 2649 | extern void dev_set_rx_mode(struct net_device *dev); |
| 2650 | extern void __dev_set_rx_mode(struct net_device *dev); |
| 2651 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
| 2652 | extern int dev_set_allmulti(struct net_device *dev, int inc); |
| 2653 | extern void netdev_state_change(struct net_device *dev); |
| 2654 | extern void netdev_notify_peers(struct net_device *dev); |
| 2655 | extern void netdev_features_change(struct net_device *dev); |
| 2656 | /* Load a device via the kmod */ |
| 2657 | extern void dev_load(struct net *net, const char *name); |
| 2658 | extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
| 2659 | struct rtnl_link_stats64 *storage); |
| 2660 | extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
| 2661 | const struct net_device_stats *netdev_stats); |
| 2662 | |
| 2663 | extern int netdev_max_backlog; |
| 2664 | extern int netdev_tstamp_prequeue; |
| 2665 | extern int weight_p; |
| 2666 | extern int bpf_jit_enable; |
| 2667 | |
| 2668 | extern bool netdev_has_upper_dev(struct net_device *dev, |
| 2669 | struct net_device *upper_dev); |
| 2670 | extern bool netdev_has_any_upper_dev(struct net_device *dev); |
| 2671 | extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
| 2672 | extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); |
| 2673 | extern int netdev_upper_dev_link(struct net_device *dev, |
| 2674 | struct net_device *upper_dev); |
| 2675 | extern int netdev_master_upper_dev_link(struct net_device *dev, |
| 2676 | struct net_device *upper_dev); |
| 2677 | extern void netdev_upper_dev_unlink(struct net_device *dev, |
| 2678 | struct net_device *upper_dev); |
| 2679 | extern int skb_checksum_help(struct sk_buff *skb); |
| 2680 | extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb, |
| 2681 | netdev_features_t features, bool tx_path); |
| 2682 | extern struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, |
| 2683 | netdev_features_t features); |
| 2684 | |
| 2685 | static inline |
| 2686 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) |
| 2687 | { |
| 2688 | return __skb_gso_segment(skb, features, true); |
| 2689 | } |
| 2690 | __be16 skb_network_protocol(struct sk_buff *skb); |
| 2691 | |
| 2692 | static inline bool can_checksum_protocol(netdev_features_t features, |
| 2693 | __be16 protocol) |
| 2694 | { |
| 2695 | return ((features & NETIF_F_GEN_CSUM) || |
| 2696 | ((features & NETIF_F_V4_CSUM) && |
| 2697 | protocol == htons(ETH_P_IP)) || |
| 2698 | ((features & NETIF_F_V6_CSUM) && |
| 2699 | protocol == htons(ETH_P_IPV6)) || |
| 2700 | ((features & NETIF_F_FCOE_CRC) && |
| 2701 | protocol == htons(ETH_P_FCOE))); |
| 2702 | } |
| 2703 | |
| 2704 | #ifdef CONFIG_BUG |
| 2705 | extern void netdev_rx_csum_fault(struct net_device *dev); |
| 2706 | #else |
| 2707 | static inline void netdev_rx_csum_fault(struct net_device *dev) |
| 2708 | { |
| 2709 | } |
| 2710 | #endif |
| 2711 | /* rx skb timestamps */ |
| 2712 | extern void net_enable_timestamp(void); |
| 2713 | extern void net_disable_timestamp(void); |
| 2714 | |
| 2715 | #ifdef CONFIG_PROC_FS |
| 2716 | extern int __init dev_proc_init(void); |
| 2717 | #else |
| 2718 | #define dev_proc_init() 0 |
| 2719 | #endif |
| 2720 | |
| 2721 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
| 2722 | extern void netdev_class_remove_file(struct class_attribute *class_attr); |
| 2723 | |
| 2724 | extern struct kobj_ns_type_operations net_ns_type_operations; |
| 2725 | |
| 2726 | extern const char *netdev_drivername(const struct net_device *dev); |
| 2727 | |
| 2728 | extern void linkwatch_run_queue(void); |
| 2729 | |
| 2730 | static inline netdev_features_t netdev_get_wanted_features( |
| 2731 | struct net_device *dev) |
| 2732 | { |
| 2733 | return (dev->features & ~dev->hw_features) | dev->wanted_features; |
| 2734 | } |
| 2735 | netdev_features_t netdev_increment_features(netdev_features_t all, |
| 2736 | netdev_features_t one, netdev_features_t mask); |
| 2737 | |
| 2738 | /* Allow TSO being used on stacked device : |
| 2739 | * Performing the GSO segmentation before last device |
| 2740 | * is a performance improvement. |
| 2741 | */ |
| 2742 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, |
| 2743 | netdev_features_t mask) |
| 2744 | { |
| 2745 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); |
| 2746 | } |
| 2747 | |
| 2748 | int __netdev_update_features(struct net_device *dev); |
| 2749 | void netdev_update_features(struct net_device *dev); |
| 2750 | void netdev_change_features(struct net_device *dev); |
| 2751 | |
| 2752 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
| 2753 | struct net_device *dev); |
| 2754 | |
| 2755 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
| 2756 | |
| 2757 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
| 2758 | { |
| 2759 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
| 2760 | |
| 2761 | /* check flags correspondence */ |
| 2762 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); |
| 2763 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); |
| 2764 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); |
| 2765 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); |
| 2766 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
| 2767 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); |
| 2768 | |
| 2769 | return (features & feature) == feature; |
| 2770 | } |
| 2771 | |
| 2772 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
| 2773 | { |
| 2774 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
| 2775 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
| 2776 | } |
| 2777 | |
| 2778 | static inline bool netif_needs_gso(struct sk_buff *skb, |
| 2779 | netdev_features_t features) |
| 2780 | { |
| 2781 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
| 2782 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
| 2783 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); |
| 2784 | } |
| 2785 | |
| 2786 | static inline void netif_set_gso_max_size(struct net_device *dev, |
| 2787 | unsigned int size) |
| 2788 | { |
| 2789 | dev->gso_max_size = size; |
| 2790 | } |
| 2791 | |
| 2792 | static inline bool netif_is_bond_master(struct net_device *dev) |
| 2793 | { |
| 2794 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; |
| 2795 | } |
| 2796 | |
| 2797 | static inline bool netif_is_bond_slave(struct net_device *dev) |
| 2798 | { |
| 2799 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; |
| 2800 | } |
| 2801 | |
| 2802 | static inline bool netif_supports_nofcs(struct net_device *dev) |
| 2803 | { |
| 2804 | return dev->priv_flags & IFF_SUPP_NOFCS; |
| 2805 | } |
| 2806 | |
| 2807 | extern struct pernet_operations __net_initdata loopback_net_ops; |
| 2808 | |
| 2809 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
| 2810 | |
| 2811 | /* netdev_printk helpers, similar to dev_printk */ |
| 2812 | |
| 2813 | static inline const char *netdev_name(const struct net_device *dev) |
| 2814 | { |
| 2815 | if (dev->reg_state != NETREG_REGISTERED) |
| 2816 | return "(unregistered net_device)"; |
| 2817 | return dev->name; |
| 2818 | } |
| 2819 | |
| 2820 | extern __printf(3, 4) |
| 2821 | int netdev_printk(const char *level, const struct net_device *dev, |
| 2822 | const char *format, ...); |
| 2823 | extern __printf(2, 3) |
| 2824 | int netdev_emerg(const struct net_device *dev, const char *format, ...); |
| 2825 | extern __printf(2, 3) |
| 2826 | int netdev_alert(const struct net_device *dev, const char *format, ...); |
| 2827 | extern __printf(2, 3) |
| 2828 | int netdev_crit(const struct net_device *dev, const char *format, ...); |
| 2829 | extern __printf(2, 3) |
| 2830 | int netdev_err(const struct net_device *dev, const char *format, ...); |
| 2831 | extern __printf(2, 3) |
| 2832 | int netdev_warn(const struct net_device *dev, const char *format, ...); |
| 2833 | extern __printf(2, 3) |
| 2834 | int netdev_notice(const struct net_device *dev, const char *format, ...); |
| 2835 | extern __printf(2, 3) |
| 2836 | int netdev_info(const struct net_device *dev, const char *format, ...); |
| 2837 | |
| 2838 | #define MODULE_ALIAS_NETDEV(device) \ |
| 2839 | MODULE_ALIAS("netdev-" device) |
| 2840 | |
| 2841 | #if defined(CONFIG_DYNAMIC_DEBUG) |
| 2842 | #define netdev_dbg(__dev, format, args...) \ |
| 2843 | do { \ |
| 2844 | dynamic_netdev_dbg(__dev, format, ##args); \ |
| 2845 | } while (0) |
| 2846 | #elif defined(DEBUG) |
| 2847 | #define netdev_dbg(__dev, format, args...) \ |
| 2848 | netdev_printk(KERN_DEBUG, __dev, format, ##args) |
| 2849 | #else |
| 2850 | #define netdev_dbg(__dev, format, args...) \ |
| 2851 | ({ \ |
| 2852 | if (0) \ |
| 2853 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ |
| 2854 | 0; \ |
| 2855 | }) |
| 2856 | #endif |
| 2857 | |
| 2858 | #if defined(VERBOSE_DEBUG) |
| 2859 | #define netdev_vdbg netdev_dbg |
| 2860 | #else |
| 2861 | |
| 2862 | #define netdev_vdbg(dev, format, args...) \ |
| 2863 | ({ \ |
| 2864 | if (0) \ |
| 2865 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ |
| 2866 | 0; \ |
| 2867 | }) |
| 2868 | #endif |
| 2869 | |
| 2870 | /* |
| 2871 | * netdev_WARN() acts like dev_printk(), but with the key difference |
| 2872 | * of using a WARN/WARN_ON to get the message out, including the |
| 2873 | * file/line information and a backtrace. |
| 2874 | */ |
| 2875 | #define netdev_WARN(dev, format, args...) \ |
| 2876 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); |
| 2877 | |
| 2878 | /* netif printk helpers, similar to netdev_printk */ |
| 2879 | |
| 2880 | #define netif_printk(priv, type, level, dev, fmt, args...) \ |
| 2881 | do { \ |
| 2882 | if (netif_msg_##type(priv)) \ |
| 2883 | netdev_printk(level, (dev), fmt, ##args); \ |
| 2884 | } while (0) |
| 2885 | |
| 2886 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
| 2887 | do { \ |
| 2888 | if (netif_msg_##type(priv)) \ |
| 2889 | netdev_##level(dev, fmt, ##args); \ |
| 2890 | } while (0) |
| 2891 | |
| 2892 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
| 2893 | netif_level(emerg, priv, type, dev, fmt, ##args) |
| 2894 | #define netif_alert(priv, type, dev, fmt, args...) \ |
| 2895 | netif_level(alert, priv, type, dev, fmt, ##args) |
| 2896 | #define netif_crit(priv, type, dev, fmt, args...) \ |
| 2897 | netif_level(crit, priv, type, dev, fmt, ##args) |
| 2898 | #define netif_err(priv, type, dev, fmt, args...) \ |
| 2899 | netif_level(err, priv, type, dev, fmt, ##args) |
| 2900 | #define netif_warn(priv, type, dev, fmt, args...) \ |
| 2901 | netif_level(warn, priv, type, dev, fmt, ##args) |
| 2902 | #define netif_notice(priv, type, dev, fmt, args...) \ |
| 2903 | netif_level(notice, priv, type, dev, fmt, ##args) |
| 2904 | #define netif_info(priv, type, dev, fmt, args...) \ |
| 2905 | netif_level(info, priv, type, dev, fmt, ##args) |
| 2906 | |
| 2907 | #if defined(CONFIG_DYNAMIC_DEBUG) |
| 2908 | #define netif_dbg(priv, type, netdev, format, args...) \ |
| 2909 | do { \ |
| 2910 | if (netif_msg_##type(priv)) \ |
| 2911 | dynamic_netdev_dbg(netdev, format, ##args); \ |
| 2912 | } while (0) |
| 2913 | #elif defined(DEBUG) |
| 2914 | #define netif_dbg(priv, type, dev, format, args...) \ |
| 2915 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) |
| 2916 | #else |
| 2917 | #define netif_dbg(priv, type, dev, format, args...) \ |
| 2918 | ({ \ |
| 2919 | if (0) \ |
| 2920 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
| 2921 | 0; \ |
| 2922 | }) |
| 2923 | #endif |
| 2924 | |
| 2925 | #if defined(VERBOSE_DEBUG) |
| 2926 | #define netif_vdbg netif_dbg |
| 2927 | #else |
| 2928 | #define netif_vdbg(priv, type, dev, format, args...) \ |
| 2929 | ({ \ |
| 2930 | if (0) \ |
| 2931 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
| 2932 | 0; \ |
| 2933 | }) |
| 2934 | #endif |
| 2935 | |
| 2936 | /* |
| 2937 | * The list of packet types we will receive (as opposed to discard) |
| 2938 | * and the routines to invoke. |
| 2939 | * |
| 2940 | * Why 16. Because with 16 the only overlap we get on a hash of the |
| 2941 | * low nibble of the protocol value is RARP/SNAP/X.25. |
| 2942 | * |
| 2943 | * NOTE: That is no longer true with the addition of VLAN tags. Not |
| 2944 | * sure which should go first, but I bet it won't make much |
| 2945 | * difference if we are running VLANs. The good news is that |
| 2946 | * this protocol won't be in the list unless compiled in, so |
| 2947 | * the average user (w/out VLANs) will not be adversely affected. |
| 2948 | * --BLG |
| 2949 | * |
| 2950 | * 0800 IP |
| 2951 | * 8100 802.1Q VLAN |
| 2952 | * 0001 802.3 |
| 2953 | * 0002 AX.25 |
| 2954 | * 0004 802.2 |
| 2955 | * 8035 RARP |
| 2956 | * 0005 SNAP |
| 2957 | * 0805 X.25 |
| 2958 | * 0806 ARP |
| 2959 | * 8137 IPX |
| 2960 | * 0009 Localtalk |
| 2961 | * 86DD IPv6 |
| 2962 | */ |
| 2963 | #define PTYPE_HASH_SIZE (16) |
| 2964 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) |
| 2965 | |
| 2966 | #endif /* _LINUX_NETDEVICE_H */ |