netdevice.h 78 KB

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  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. #include <linux/if.h>
  28. #include <linux/if_ether.h>
  29. #include <linux/if_packet.h>
  30. #include <linux/if_link.h>
  31. #ifdef __KERNEL__
  32. #include <linux/pm_qos_params.h>
  33. #include <linux/timer.h>
  34. #include <linux/delay.h>
  35. #include <linux/mm.h>
  36. #include <asm/atomic.h>
  37. #include <asm/cache.h>
  38. #include <asm/byteorder.h>
  39. #include <linux/device.h>
  40. #include <linux/percpu.h>
  41. #include <linux/rculist.h>
  42. #include <linux/dmaengine.h>
  43. #include <linux/workqueue.h>
  44. #include <linux/ethtool.h>
  45. #include <net/net_namespace.h>
  46. #include <net/dsa.h>
  47. #ifdef CONFIG_DCB
  48. #include <net/dcbnl.h>
  49. #endif
  50. struct vlan_group;
  51. struct netpoll_info;
  52. struct phy_device;
  53. /* 802.11 specific */
  54. struct wireless_dev;
  55. /* source back-compat hooks */
  56. #define SET_ETHTOOL_OPS(netdev,ops) \
  57. ( (netdev)->ethtool_ops = (ops) )
  58. #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
  59. functions are available. */
  60. #define HAVE_FREE_NETDEV /* free_netdev() */
  61. #define HAVE_NETDEV_PRIV /* netdev_priv() */
  62. /* hardware address assignment types */
  63. #define NET_ADDR_PERM 0 /* address is permanent (default) */
  64. #define NET_ADDR_RANDOM 1 /* address is generated randomly */
  65. #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
  66. /* Backlog congestion levels */
  67. #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
  68. #define NET_RX_DROP 1 /* packet dropped */
  69. /* Initial net device group. All devices belong to group 0 by default. */
  70. #define INIT_NETDEV_GROUP 0
  71. /*
  72. * Transmit return codes: transmit return codes originate from three different
  73. * namespaces:
  74. *
  75. * - qdisc return codes
  76. * - driver transmit return codes
  77. * - errno values
  78. *
  79. * Drivers are allowed to return any one of those in their hard_start_xmit()
  80. * function. Real network devices commonly used with qdiscs should only return
  81. * the driver transmit return codes though - when qdiscs are used, the actual
  82. * transmission happens asynchronously, so the value is not propagated to
  83. * higher layers. Virtual network devices transmit synchronously, in this case
  84. * the driver transmit return codes are consumed by dev_queue_xmit(), all
  85. * others are propagated to higher layers.
  86. */
  87. /* qdisc ->enqueue() return codes. */
  88. #define NET_XMIT_SUCCESS 0x00
  89. #define NET_XMIT_DROP 0x01 /* skb dropped */
  90. #define NET_XMIT_CN 0x02 /* congestion notification */
  91. #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
  92. #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
  93. /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
  94. * indicates that the device will soon be dropping packets, or already drops
  95. * some packets of the same priority; prompting us to send less aggressively. */
  96. #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
  97. #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
  98. /* Driver transmit return codes */
  99. #define NETDEV_TX_MASK 0xf0
  100. enum netdev_tx {
  101. __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
  102. NETDEV_TX_OK = 0x00, /* driver took care of packet */
  103. NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
  104. NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
  105. };
  106. typedef enum netdev_tx netdev_tx_t;
  107. /*
  108. * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
  109. * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
  110. */
  111. static inline bool dev_xmit_complete(int rc)
  112. {
  113. /*
  114. * Positive cases with an skb consumed by a driver:
  115. * - successful transmission (rc == NETDEV_TX_OK)
  116. * - error while transmitting (rc < 0)
  117. * - error while queueing to a different device (rc & NET_XMIT_MASK)
  118. */
  119. if (likely(rc < NET_XMIT_MASK))
  120. return true;
  121. return false;
  122. }
  123. #endif
  124. #define MAX_ADDR_LEN 32 /* Largest hardware address length */
  125. #ifdef __KERNEL__
  126. /*
  127. * Compute the worst case header length according to the protocols
  128. * used.
  129. */
  130. #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
  131. # if defined(CONFIG_MAC80211_MESH)
  132. # define LL_MAX_HEADER 128
  133. # else
  134. # define LL_MAX_HEADER 96
  135. # endif
  136. #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
  137. # define LL_MAX_HEADER 48
  138. #else
  139. # define LL_MAX_HEADER 32
  140. #endif
  141. #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
  142. !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
  143. !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
  144. !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
  145. #define MAX_HEADER LL_MAX_HEADER
  146. #else
  147. #define MAX_HEADER (LL_MAX_HEADER + 48)
  148. #endif
  149. /*
  150. * Old network device statistics. Fields are native words
  151. * (unsigned long) so they can be read and written atomically.
  152. */
  153. struct net_device_stats {
  154. unsigned long rx_packets;
  155. unsigned long tx_packets;
  156. unsigned long rx_bytes;
  157. unsigned long tx_bytes;
  158. unsigned long rx_errors;
  159. unsigned long tx_errors;
  160. unsigned long rx_dropped;
  161. unsigned long tx_dropped;
  162. unsigned long multicast;
  163. unsigned long collisions;
  164. unsigned long rx_length_errors;
  165. unsigned long rx_over_errors;
  166. unsigned long rx_crc_errors;
  167. unsigned long rx_frame_errors;
  168. unsigned long rx_fifo_errors;
  169. unsigned long rx_missed_errors;
  170. unsigned long tx_aborted_errors;
  171. unsigned long tx_carrier_errors;
  172. unsigned long tx_fifo_errors;
  173. unsigned long tx_heartbeat_errors;
  174. unsigned long tx_window_errors;
  175. unsigned long rx_compressed;
  176. unsigned long tx_compressed;
  177. };
  178. #endif /* __KERNEL__ */
  179. /* Media selection options. */
  180. enum {
  181. IF_PORT_UNKNOWN = 0,
  182. IF_PORT_10BASE2,
  183. IF_PORT_10BASET,
  184. IF_PORT_AUI,
  185. IF_PORT_100BASET,
  186. IF_PORT_100BASETX,
  187. IF_PORT_100BASEFX
  188. };
  189. #ifdef __KERNEL__
  190. #include <linux/cache.h>
  191. #include <linux/skbuff.h>
  192. struct neighbour;
  193. struct neigh_parms;
  194. struct sk_buff;
  195. struct netdev_hw_addr {
  196. struct list_head list;
  197. unsigned char addr[MAX_ADDR_LEN];
  198. unsigned char type;
  199. #define NETDEV_HW_ADDR_T_LAN 1
  200. #define NETDEV_HW_ADDR_T_SAN 2
  201. #define NETDEV_HW_ADDR_T_SLAVE 3
  202. #define NETDEV_HW_ADDR_T_UNICAST 4
  203. #define NETDEV_HW_ADDR_T_MULTICAST 5
  204. bool synced;
  205. bool global_use;
  206. int refcount;
  207. struct rcu_head rcu_head;
  208. };
  209. struct netdev_hw_addr_list {
  210. struct list_head list;
  211. int count;
  212. };
  213. #define netdev_hw_addr_list_count(l) ((l)->count)
  214. #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
  215. #define netdev_hw_addr_list_for_each(ha, l) \
  216. list_for_each_entry(ha, &(l)->list, list)
  217. #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
  218. #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
  219. #define netdev_for_each_uc_addr(ha, dev) \
  220. netdev_hw_addr_list_for_each(ha, &(dev)->uc)
  221. #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
  222. #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
  223. #define netdev_for_each_mc_addr(ha, dev) \
  224. netdev_hw_addr_list_for_each(ha, &(dev)->mc)
  225. struct hh_cache {
  226. struct hh_cache *hh_next; /* Next entry */
  227. atomic_t hh_refcnt; /* number of users */
  228. /*
  229. * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
  230. * cache line on SMP.
  231. * They are mostly read, but hh_refcnt may be changed quite frequently,
  232. * incurring cache line ping pongs.
  233. */
  234. __be16 hh_type ____cacheline_aligned_in_smp;
  235. /* protocol identifier, f.e ETH_P_IP
  236. * NOTE: For VLANs, this will be the
  237. * encapuslated type. --BLG
  238. */
  239. u16 hh_len; /* length of header */
  240. int (*hh_output)(struct sk_buff *skb);
  241. seqlock_t hh_lock;
  242. /* cached hardware header; allow for machine alignment needs. */
  243. #define HH_DATA_MOD 16
  244. #define HH_DATA_OFF(__len) \
  245. (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
  246. #define HH_DATA_ALIGN(__len) \
  247. (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
  248. unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
  249. };
  250. static inline void hh_cache_put(struct hh_cache *hh)
  251. {
  252. if (atomic_dec_and_test(&hh->hh_refcnt))
  253. kfree(hh);
  254. }
  255. /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
  256. * Alternative is:
  257. * dev->hard_header_len ? (dev->hard_header_len +
  258. * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
  259. *
  260. * We could use other alignment values, but we must maintain the
  261. * relationship HH alignment <= LL alignment.
  262. *
  263. * LL_ALLOCATED_SPACE also takes into account the tailroom the device
  264. * may need.
  265. */
  266. #define LL_RESERVED_SPACE(dev) \
  267. ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  268. #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
  269. ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  270. #define LL_ALLOCATED_SPACE(dev) \
  271. ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  272. struct header_ops {
  273. int (*create) (struct sk_buff *skb, struct net_device *dev,
  274. unsigned short type, const void *daddr,
  275. const void *saddr, unsigned len);
  276. int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
  277. int (*rebuild)(struct sk_buff *skb);
  278. #define HAVE_HEADER_CACHE
  279. int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
  280. void (*cache_update)(struct hh_cache *hh,
  281. const struct net_device *dev,
  282. const unsigned char *haddr);
  283. };
  284. /* These flag bits are private to the generic network queueing
  285. * layer, they may not be explicitly referenced by any other
  286. * code.
  287. */
  288. enum netdev_state_t {
  289. __LINK_STATE_START,
  290. __LINK_STATE_PRESENT,
  291. __LINK_STATE_NOCARRIER,
  292. __LINK_STATE_LINKWATCH_PENDING,
  293. __LINK_STATE_DORMANT,
  294. };
  295. /*
  296. * This structure holds at boot time configured netdevice settings. They
  297. * are then used in the device probing.
  298. */
  299. struct netdev_boot_setup {
  300. char name[IFNAMSIZ];
  301. struct ifmap map;
  302. };
  303. #define NETDEV_BOOT_SETUP_MAX 8
  304. extern int __init netdev_boot_setup(char *str);
  305. /*
  306. * Structure for NAPI scheduling similar to tasklet but with weighting
  307. */
  308. struct napi_struct {
  309. /* The poll_list must only be managed by the entity which
  310. * changes the state of the NAPI_STATE_SCHED bit. This means
  311. * whoever atomically sets that bit can add this napi_struct
  312. * to the per-cpu poll_list, and whoever clears that bit
  313. * can remove from the list right before clearing the bit.
  314. */
  315. struct list_head poll_list;
  316. unsigned long state;
  317. int weight;
  318. int (*poll)(struct napi_struct *, int);
  319. #ifdef CONFIG_NETPOLL
  320. spinlock_t poll_lock;
  321. int poll_owner;
  322. #endif
  323. unsigned int gro_count;
  324. struct net_device *dev;
  325. struct list_head dev_list;
  326. struct sk_buff *gro_list;
  327. struct sk_buff *skb;
  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. enum gro_result {
  335. GRO_MERGED,
  336. GRO_MERGED_FREE,
  337. GRO_HELD,
  338. GRO_NORMAL,
  339. GRO_DROP,
  340. };
  341. typedef enum gro_result gro_result_t;
  342. typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
  343. extern void __napi_schedule(struct napi_struct *n);
  344. static inline int napi_disable_pending(struct napi_struct *n)
  345. {
  346. return test_bit(NAPI_STATE_DISABLE, &n->state);
  347. }
  348. /**
  349. * napi_schedule_prep - check if napi can be scheduled
  350. * @n: napi context
  351. *
  352. * Test if NAPI routine is already running, and if not mark
  353. * it as running. This is used as a condition variable
  354. * insure only one NAPI poll instance runs. We also make
  355. * sure there is no pending NAPI disable.
  356. */
  357. static inline int napi_schedule_prep(struct napi_struct *n)
  358. {
  359. return !napi_disable_pending(n) &&
  360. !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
  361. }
  362. /**
  363. * napi_schedule - schedule NAPI poll
  364. * @n: napi context
  365. *
  366. * Schedule NAPI poll routine to be called if it is not already
  367. * running.
  368. */
  369. static inline void napi_schedule(struct napi_struct *n)
  370. {
  371. if (napi_schedule_prep(n))
  372. __napi_schedule(n);
  373. }
  374. /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
  375. static inline int napi_reschedule(struct napi_struct *napi)
  376. {
  377. if (napi_schedule_prep(napi)) {
  378. __napi_schedule(napi);
  379. return 1;
  380. }
  381. return 0;
  382. }
  383. /**
  384. * napi_complete - NAPI processing complete
  385. * @n: napi context
  386. *
  387. * Mark NAPI processing as complete.
  388. */
  389. extern void __napi_complete(struct napi_struct *n);
  390. extern void napi_complete(struct napi_struct *n);
  391. /**
  392. * napi_disable - prevent NAPI from scheduling
  393. * @n: napi context
  394. *
  395. * Stop NAPI from being scheduled on this context.
  396. * Waits till any outstanding processing completes.
  397. */
  398. static inline void napi_disable(struct napi_struct *n)
  399. {
  400. set_bit(NAPI_STATE_DISABLE, &n->state);
  401. while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
  402. msleep(1);
  403. clear_bit(NAPI_STATE_DISABLE, &n->state);
  404. }
  405. /**
  406. * napi_enable - enable NAPI scheduling
  407. * @n: napi context
  408. *
  409. * Resume NAPI from being scheduled on this context.
  410. * Must be paired with napi_disable.
  411. */
  412. static inline void napi_enable(struct napi_struct *n)
  413. {
  414. BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
  415. smp_mb__before_clear_bit();
  416. clear_bit(NAPI_STATE_SCHED, &n->state);
  417. }
  418. #ifdef CONFIG_SMP
  419. /**
  420. * napi_synchronize - wait until NAPI is not running
  421. * @n: napi context
  422. *
  423. * Wait until NAPI is done being scheduled on this context.
  424. * Waits till any outstanding processing completes but
  425. * does not disable future activations.
  426. */
  427. static inline void napi_synchronize(const struct napi_struct *n)
  428. {
  429. while (test_bit(NAPI_STATE_SCHED, &n->state))
  430. msleep(1);
  431. }
  432. #else
  433. # define napi_synchronize(n) barrier()
  434. #endif
  435. enum netdev_queue_state_t {
  436. __QUEUE_STATE_XOFF,
  437. __QUEUE_STATE_FROZEN,
  438. #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
  439. (1 << __QUEUE_STATE_FROZEN))
  440. };
  441. struct netdev_queue {
  442. /*
  443. * read mostly part
  444. */
  445. struct net_device *dev;
  446. struct Qdisc *qdisc;
  447. unsigned long state;
  448. struct Qdisc *qdisc_sleeping;
  449. #ifdef CONFIG_RPS
  450. struct kobject kobj;
  451. #endif
  452. #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
  453. int numa_node;
  454. #endif
  455. /*
  456. * write mostly part
  457. */
  458. spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
  459. int xmit_lock_owner;
  460. /*
  461. * please use this field instead of dev->trans_start
  462. */
  463. unsigned long trans_start;
  464. } ____cacheline_aligned_in_smp;
  465. static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
  466. {
  467. #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
  468. return q->numa_node;
  469. #else
  470. return NUMA_NO_NODE;
  471. #endif
  472. }
  473. static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
  474. {
  475. #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
  476. q->numa_node = node;
  477. #endif
  478. }
  479. #ifdef CONFIG_RPS
  480. /*
  481. * This structure holds an RPS map which can be of variable length. The
  482. * map is an array of CPUs.
  483. */
  484. struct rps_map {
  485. unsigned int len;
  486. struct rcu_head rcu;
  487. u16 cpus[0];
  488. };
  489. #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
  490. /*
  491. * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
  492. * tail pointer for that CPU's input queue at the time of last enqueue, and
  493. * a hardware filter index.
  494. */
  495. struct rps_dev_flow {
  496. u16 cpu;
  497. u16 filter;
  498. unsigned int last_qtail;
  499. };
  500. #define RPS_NO_FILTER 0xffff
  501. /*
  502. * The rps_dev_flow_table structure contains a table of flow mappings.
  503. */
  504. struct rps_dev_flow_table {
  505. unsigned int mask;
  506. struct rcu_head rcu;
  507. struct work_struct free_work;
  508. struct rps_dev_flow flows[0];
  509. };
  510. #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
  511. (_num * sizeof(struct rps_dev_flow)))
  512. /*
  513. * The rps_sock_flow_table contains mappings of flows to the last CPU
  514. * on which they were processed by the application (set in recvmsg).
  515. */
  516. struct rps_sock_flow_table {
  517. unsigned int mask;
  518. u16 ents[0];
  519. };
  520. #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
  521. (_num * sizeof(u16)))
  522. #define RPS_NO_CPU 0xffff
  523. static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
  524. u32 hash)
  525. {
  526. if (table && hash) {
  527. unsigned int cpu, index = hash & table->mask;
  528. /* We only give a hint, preemption can change cpu under us */
  529. cpu = raw_smp_processor_id();
  530. if (table->ents[index] != cpu)
  531. table->ents[index] = cpu;
  532. }
  533. }
  534. static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
  535. u32 hash)
  536. {
  537. if (table && hash)
  538. table->ents[hash & table->mask] = RPS_NO_CPU;
  539. }
  540. extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
  541. #ifdef CONFIG_RFS_ACCEL
  542. extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
  543. u32 flow_id, u16 filter_id);
  544. #endif
  545. /* This structure contains an instance of an RX queue. */
  546. struct netdev_rx_queue {
  547. struct rps_map __rcu *rps_map;
  548. struct rps_dev_flow_table __rcu *rps_flow_table;
  549. struct kobject kobj;
  550. struct net_device *dev;
  551. } ____cacheline_aligned_in_smp;
  552. #endif /* CONFIG_RPS */
  553. #ifdef CONFIG_XPS
  554. /*
  555. * This structure holds an XPS map which can be of variable length. The
  556. * map is an array of queues.
  557. */
  558. struct xps_map {
  559. unsigned int len;
  560. unsigned int alloc_len;
  561. struct rcu_head rcu;
  562. u16 queues[0];
  563. };
  564. #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
  565. #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
  566. / sizeof(u16))
  567. /*
  568. * This structure holds all XPS maps for device. Maps are indexed by CPU.
  569. */
  570. struct xps_dev_maps {
  571. struct rcu_head rcu;
  572. struct xps_map __rcu *cpu_map[0];
  573. };
  574. #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
  575. (nr_cpu_ids * sizeof(struct xps_map *)))
  576. #endif /* CONFIG_XPS */
  577. #define TC_MAX_QUEUE 16
  578. #define TC_BITMASK 15
  579. /* HW offloaded queuing disciplines txq count and offset maps */
  580. struct netdev_tc_txq {
  581. u16 count;
  582. u16 offset;
  583. };
  584. /*
  585. * This structure defines the management hooks for network devices.
  586. * The following hooks can be defined; unless noted otherwise, they are
  587. * optional and can be filled with a null pointer.
  588. *
  589. * int (*ndo_init)(struct net_device *dev);
  590. * This function is called once when network device is registered.
  591. * The network device can use this to any late stage initializaton
  592. * or semantic validattion. It can fail with an error code which will
  593. * be propogated back to register_netdev
  594. *
  595. * void (*ndo_uninit)(struct net_device *dev);
  596. * This function is called when device is unregistered or when registration
  597. * fails. It is not called if init fails.
  598. *
  599. * int (*ndo_open)(struct net_device *dev);
  600. * This function is called when network device transistions to the up
  601. * state.
  602. *
  603. * int (*ndo_stop)(struct net_device *dev);
  604. * This function is called when network device transistions to the down
  605. * state.
  606. *
  607. * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
  608. * struct net_device *dev);
  609. * Called when a packet needs to be transmitted.
  610. * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
  611. * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
  612. * Required can not be NULL.
  613. *
  614. * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
  615. * Called to decide which queue to when device supports multiple
  616. * transmit queues.
  617. *
  618. * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
  619. * This function is called to allow device receiver to make
  620. * changes to configuration when multicast or promiscious is enabled.
  621. *
  622. * void (*ndo_set_rx_mode)(struct net_device *dev);
  623. * This function is called device changes address list filtering.
  624. *
  625. * void (*ndo_set_multicast_list)(struct net_device *dev);
  626. * This function is called when the multicast address list changes.
  627. *
  628. * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
  629. * This function is called when the Media Access Control address
  630. * needs to be changed. If this interface is not defined, the
  631. * mac address can not be changed.
  632. *
  633. * int (*ndo_validate_addr)(struct net_device *dev);
  634. * Test if Media Access Control address is valid for the device.
  635. *
  636. * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
  637. * Called when a user request an ioctl which can't be handled by
  638. * the generic interface code. If not defined ioctl's return
  639. * not supported error code.
  640. *
  641. * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
  642. * Used to set network devices bus interface parameters. This interface
  643. * is retained for legacy reason, new devices should use the bus
  644. * interface (PCI) for low level management.
  645. *
  646. * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
  647. * Called when a user wants to change the Maximum Transfer Unit
  648. * of a device. If not defined, any request to change MTU will
  649. * will return an error.
  650. *
  651. * void (*ndo_tx_timeout)(struct net_device *dev);
  652. * Callback uses when the transmitter has not made any progress
  653. * for dev->watchdog ticks.
  654. *
  655. * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
  656. * struct rtnl_link_stats64 *storage);
  657. * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
  658. * Called when a user wants to get the network device usage
  659. * statistics. Drivers must do one of the following:
  660. * 1. Define @ndo_get_stats64 to fill in a zero-initialised
  661. * rtnl_link_stats64 structure passed by the caller.
  662. * 2. Define @ndo_get_stats to update a net_device_stats structure
  663. * (which should normally be dev->stats) and return a pointer to
  664. * it. The structure may be changed asynchronously only if each
  665. * field is written atomically.
  666. * 3. Update dev->stats asynchronously and atomically, and define
  667. * neither operation.
  668. *
  669. * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
  670. * If device support VLAN receive acceleration
  671. * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
  672. * when vlan groups for the device changes. Note: grp is NULL
  673. * if no vlan's groups are being used.
  674. *
  675. * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
  676. * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
  677. * this function is called when a VLAN id is registered.
  678. *
  679. * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
  680. * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
  681. * this function is called when a VLAN id is unregistered.
  682. *
  683. * void (*ndo_poll_controller)(struct net_device *dev);
  684. *
  685. * SR-IOV management functions.
  686. * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
  687. * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
  688. * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
  689. * int (*ndo_get_vf_config)(struct net_device *dev,
  690. * int vf, struct ifla_vf_info *ivf);
  691. * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
  692. * struct nlattr *port[]);
  693. * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
  694. * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
  695. * Called to setup 'tc' number of traffic classes in the net device. This
  696. * is always called from the stack with the rtnl lock held and netif tx
  697. * queues stopped. This allows the netdevice to perform queue management
  698. * safely.
  699. *
  700. * RFS acceleration.
  701. * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
  702. * u16 rxq_index, u32 flow_id);
  703. * Set hardware filter for RFS. rxq_index is the target queue index;
  704. * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
  705. * Return the filter ID on success, or a negative error code.
  706. *
  707. * Slave management functions (for bridge, bonding, etc). User should
  708. * call netdev_set_master() to set dev->master properly.
  709. * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
  710. * Called to make another netdev an underling.
  711. *
  712. * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
  713. * Called to release previously enslaved netdev.
  714. */
  715. #define HAVE_NET_DEVICE_OPS
  716. struct net_device_ops {
  717. int (*ndo_init)(struct net_device *dev);
  718. void (*ndo_uninit)(struct net_device *dev);
  719. int (*ndo_open)(struct net_device *dev);
  720. int (*ndo_stop)(struct net_device *dev);
  721. netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
  722. struct net_device *dev);
  723. u16 (*ndo_select_queue)(struct net_device *dev,
  724. struct sk_buff *skb);
  725. void (*ndo_change_rx_flags)(struct net_device *dev,
  726. int flags);
  727. void (*ndo_set_rx_mode)(struct net_device *dev);
  728. void (*ndo_set_multicast_list)(struct net_device *dev);
  729. int (*ndo_set_mac_address)(struct net_device *dev,
  730. void *addr);
  731. int (*ndo_validate_addr)(struct net_device *dev);
  732. int (*ndo_do_ioctl)(struct net_device *dev,
  733. struct ifreq *ifr, int cmd);
  734. int (*ndo_set_config)(struct net_device *dev,
  735. struct ifmap *map);
  736. int (*ndo_change_mtu)(struct net_device *dev,
  737. int new_mtu);
  738. int (*ndo_neigh_setup)(struct net_device *dev,
  739. struct neigh_parms *);
  740. void (*ndo_tx_timeout) (struct net_device *dev);
  741. struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
  742. struct rtnl_link_stats64 *storage);
  743. struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
  744. void (*ndo_vlan_rx_register)(struct net_device *dev,
  745. struct vlan_group *grp);
  746. void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
  747. unsigned short vid);
  748. void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
  749. unsigned short vid);
  750. #ifdef CONFIG_NET_POLL_CONTROLLER
  751. void (*ndo_poll_controller)(struct net_device *dev);
  752. int (*ndo_netpoll_setup)(struct net_device *dev,
  753. struct netpoll_info *info);
  754. void (*ndo_netpoll_cleanup)(struct net_device *dev);
  755. #endif
  756. int (*ndo_set_vf_mac)(struct net_device *dev,
  757. int queue, u8 *mac);
  758. int (*ndo_set_vf_vlan)(struct net_device *dev,
  759. int queue, u16 vlan, u8 qos);
  760. int (*ndo_set_vf_tx_rate)(struct net_device *dev,
  761. int vf, int rate);
  762. int (*ndo_get_vf_config)(struct net_device *dev,
  763. int vf,
  764. struct ifla_vf_info *ivf);
  765. int (*ndo_set_vf_port)(struct net_device *dev,
  766. int vf,
  767. struct nlattr *port[]);
  768. int (*ndo_get_vf_port)(struct net_device *dev,
  769. int vf, struct sk_buff *skb);
  770. int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
  771. #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  772. int (*ndo_fcoe_enable)(struct net_device *dev);
  773. int (*ndo_fcoe_disable)(struct net_device *dev);
  774. int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
  775. u16 xid,
  776. struct scatterlist *sgl,
  777. unsigned int sgc);
  778. int (*ndo_fcoe_ddp_done)(struct net_device *dev,
  779. u16 xid);
  780. #define NETDEV_FCOE_WWNN 0
  781. #define NETDEV_FCOE_WWPN 1
  782. int (*ndo_fcoe_get_wwn)(struct net_device *dev,
  783. u64 *wwn, int type);
  784. #endif
  785. #ifdef CONFIG_RFS_ACCEL
  786. int (*ndo_rx_flow_steer)(struct net_device *dev,
  787. const struct sk_buff *skb,
  788. u16 rxq_index,
  789. u32 flow_id);
  790. #endif
  791. int (*ndo_add_slave)(struct net_device *dev,
  792. struct net_device *slave_dev);
  793. int (*ndo_del_slave)(struct net_device *dev,
  794. struct net_device *slave_dev);
  795. };
  796. /*
  797. * The DEVICE structure.
  798. * Actually, this whole structure is a big mistake. It mixes I/O
  799. * data with strictly "high-level" data, and it has to know about
  800. * almost every data structure used in the INET module.
  801. *
  802. * FIXME: cleanup struct net_device such that network protocol info
  803. * moves out.
  804. */
  805. struct net_device {
  806. /*
  807. * This is the first field of the "visible" part of this structure
  808. * (i.e. as seen by users in the "Space.c" file). It is the name
  809. * of the interface.
  810. */
  811. char name[IFNAMSIZ];
  812. struct pm_qos_request_list pm_qos_req;
  813. /* device name hash chain */
  814. struct hlist_node name_hlist;
  815. /* snmp alias */
  816. char *ifalias;
  817. /*
  818. * I/O specific fields
  819. * FIXME: Merge these and struct ifmap into one
  820. */
  821. unsigned long mem_end; /* shared mem end */
  822. unsigned long mem_start; /* shared mem start */
  823. unsigned long base_addr; /* device I/O address */
  824. unsigned int irq; /* device IRQ number */
  825. /*
  826. * Some hardware also needs these fields, but they are not
  827. * part of the usual set specified in Space.c.
  828. */
  829. unsigned char if_port; /* Selectable AUI, TP,..*/
  830. unsigned char dma; /* DMA channel */
  831. unsigned long state;
  832. struct list_head dev_list;
  833. struct list_head napi_list;
  834. struct list_head unreg_list;
  835. /* Net device features */
  836. u32 features;
  837. /* VLAN feature mask */
  838. u32 vlan_features;
  839. #define NETIF_F_SG 1 /* Scatter/gather IO. */
  840. #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
  841. #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
  842. #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
  843. #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
  844. #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
  845. #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
  846. #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
  847. #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
  848. #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
  849. #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
  850. #define NETIF_F_GSO 2048 /* Enable software GSO. */
  851. #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
  852. /* do not use LLTX in new drivers */
  853. #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
  854. #define NETIF_F_GRO 16384 /* Generic receive offload */
  855. #define NETIF_F_LRO 32768 /* large receive offload */
  856. /* the GSO_MASK reserves bits 16 through 23 */
  857. #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
  858. #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
  859. #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
  860. #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
  861. #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
  862. /* Segmentation offload features */
  863. #define NETIF_F_GSO_SHIFT 16
  864. #define NETIF_F_GSO_MASK 0x00ff0000
  865. #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
  866. #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
  867. #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
  868. #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
  869. #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
  870. #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
  871. /* List of features with software fallbacks. */
  872. #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
  873. NETIF_F_TSO6 | NETIF_F_UFO)
  874. #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
  875. #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
  876. #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
  877. #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
  878. /*
  879. * If one device supports one of these features, then enable them
  880. * for all in netdev_increment_features.
  881. */
  882. #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
  883. NETIF_F_SG | NETIF_F_HIGHDMA | \
  884. NETIF_F_FRAGLIST)
  885. /* changeable features with no special hardware requirements */
  886. #define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
  887. /* Interface index. Unique device identifier */
  888. int ifindex;
  889. int iflink;
  890. struct net_device_stats stats;
  891. atomic_long_t rx_dropped; /* dropped packets by core network
  892. * Do not use this in drivers.
  893. */
  894. #ifdef CONFIG_WIRELESS_EXT
  895. /* List of functions to handle Wireless Extensions (instead of ioctl).
  896. * See <net/iw_handler.h> for details. Jean II */
  897. const struct iw_handler_def * wireless_handlers;
  898. /* Instance data managed by the core of Wireless Extensions. */
  899. struct iw_public_data * wireless_data;
  900. #endif
  901. /* Management operations */
  902. const struct net_device_ops *netdev_ops;
  903. const struct ethtool_ops *ethtool_ops;
  904. /* Hardware header description */
  905. const struct header_ops *header_ops;
  906. unsigned int flags; /* interface flags (a la BSD) */
  907. unsigned short gflags;
  908. unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
  909. unsigned short padded; /* How much padding added by alloc_netdev() */
  910. unsigned char operstate; /* RFC2863 operstate */
  911. unsigned char link_mode; /* mapping policy to operstate */
  912. unsigned int mtu; /* interface MTU value */
  913. unsigned short type; /* interface hardware type */
  914. unsigned short hard_header_len; /* hardware hdr length */
  915. /* extra head- and tailroom the hardware may need, but not in all cases
  916. * can this be guaranteed, especially tailroom. Some cases also use
  917. * LL_MAX_HEADER instead to allocate the skb.
  918. */
  919. unsigned short needed_headroom;
  920. unsigned short needed_tailroom;
  921. /* Interface address info. */
  922. unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
  923. unsigned char addr_assign_type; /* hw address assignment type */
  924. unsigned char addr_len; /* hardware address length */
  925. unsigned short dev_id; /* for shared network cards */
  926. spinlock_t addr_list_lock;
  927. struct netdev_hw_addr_list uc; /* Unicast mac addresses */
  928. struct netdev_hw_addr_list mc; /* Multicast mac addresses */
  929. int uc_promisc;
  930. unsigned int promiscuity;
  931. unsigned int allmulti;
  932. /* Protocol specific pointers */
  933. #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
  934. struct vlan_group __rcu *vlgrp; /* VLAN group */
  935. #endif
  936. #ifdef CONFIG_NET_DSA
  937. void *dsa_ptr; /* dsa specific data */
  938. #endif
  939. void *atalk_ptr; /* AppleTalk link */
  940. struct in_device __rcu *ip_ptr; /* IPv4 specific data */
  941. struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
  942. struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
  943. void *ec_ptr; /* Econet specific data */
  944. void *ax25_ptr; /* AX.25 specific data */
  945. struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
  946. assign before registering */
  947. /*
  948. * Cache lines mostly used on receive path (including eth_type_trans())
  949. */
  950. unsigned long last_rx; /* Time of last Rx
  951. * This should not be set in
  952. * drivers, unless really needed,
  953. * because network stack (bonding)
  954. * use it if/when necessary, to
  955. * avoid dirtying this cache line.
  956. */
  957. struct net_device *master; /* Pointer to master device of a group,
  958. * which this device is member of.
  959. */
  960. /* Interface address info used in eth_type_trans() */
  961. unsigned char *dev_addr; /* hw address, (before bcast
  962. because most packets are
  963. unicast) */
  964. struct netdev_hw_addr_list dev_addrs; /* list of device
  965. hw addresses */
  966. unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
  967. #ifdef CONFIG_RPS
  968. struct kset *queues_kset;
  969. struct netdev_rx_queue *_rx;
  970. /* Number of RX queues allocated at register_netdev() time */
  971. unsigned int num_rx_queues;
  972. /* Number of RX queues currently active in device */
  973. unsigned int real_num_rx_queues;
  974. #ifdef CONFIG_RFS_ACCEL
  975. /* CPU reverse-mapping for RX completion interrupts, indexed
  976. * by RX queue number. Assigned by driver. This must only be
  977. * set if the ndo_rx_flow_steer operation is defined. */
  978. struct cpu_rmap *rx_cpu_rmap;
  979. #endif
  980. #endif
  981. rx_handler_func_t __rcu *rx_handler;
  982. void __rcu *rx_handler_data;
  983. struct netdev_queue __rcu *ingress_queue;
  984. /*
  985. * Cache lines mostly used on transmit path
  986. */
  987. struct netdev_queue *_tx ____cacheline_aligned_in_smp;
  988. /* Number of TX queues allocated at alloc_netdev_mq() time */
  989. unsigned int num_tx_queues;
  990. /* Number of TX queues currently active in device */
  991. unsigned int real_num_tx_queues;
  992. /* root qdisc from userspace point of view */
  993. struct Qdisc *qdisc;
  994. unsigned long tx_queue_len; /* Max frames per queue allowed */
  995. spinlock_t tx_global_lock;
  996. #ifdef CONFIG_XPS
  997. struct xps_dev_maps __rcu *xps_maps;
  998. #endif
  999. /* These may be needed for future network-power-down code. */
  1000. /*
  1001. * trans_start here is expensive for high speed devices on SMP,
  1002. * please use netdev_queue->trans_start instead.
  1003. */
  1004. unsigned long trans_start; /* Time (in jiffies) of last Tx */
  1005. int watchdog_timeo; /* used by dev_watchdog() */
  1006. struct timer_list watchdog_timer;
  1007. /* Number of references to this device */
  1008. int __percpu *pcpu_refcnt;
  1009. /* delayed register/unregister */
  1010. struct list_head todo_list;
  1011. /* device index hash chain */
  1012. struct hlist_node index_hlist;
  1013. struct list_head link_watch_list;
  1014. /* register/unregister state machine */
  1015. enum { NETREG_UNINITIALIZED=0,
  1016. NETREG_REGISTERED, /* completed register_netdevice */
  1017. NETREG_UNREGISTERING, /* called unregister_netdevice */
  1018. NETREG_UNREGISTERED, /* completed unregister todo */
  1019. NETREG_RELEASED, /* called free_netdev */
  1020. NETREG_DUMMY, /* dummy device for NAPI poll */
  1021. } reg_state:16;
  1022. enum {
  1023. RTNL_LINK_INITIALIZED,
  1024. RTNL_LINK_INITIALIZING,
  1025. } rtnl_link_state:16;
  1026. /* Called from unregister, can be used to call free_netdev */
  1027. void (*destructor)(struct net_device *dev);
  1028. #ifdef CONFIG_NETPOLL
  1029. struct netpoll_info *npinfo;
  1030. #endif
  1031. #ifdef CONFIG_NET_NS
  1032. /* Network namespace this network device is inside */
  1033. struct net *nd_net;
  1034. #endif
  1035. /* mid-layer private */
  1036. union {
  1037. void *ml_priv;
  1038. struct pcpu_lstats __percpu *lstats; /* loopback stats */
  1039. struct pcpu_tstats __percpu *tstats; /* tunnel stats */
  1040. struct pcpu_dstats __percpu *dstats; /* dummy stats */
  1041. };
  1042. /* GARP */
  1043. struct garp_port __rcu *garp_port;
  1044. /* class/net/name entry */
  1045. struct device dev;
  1046. /* space for optional device, statistics, and wireless sysfs groups */
  1047. const struct attribute_group *sysfs_groups[4];
  1048. /* rtnetlink link ops */
  1049. const struct rtnl_link_ops *rtnl_link_ops;
  1050. /* for setting kernel sock attribute on TCP connection setup */
  1051. #define GSO_MAX_SIZE 65536
  1052. unsigned int gso_max_size;
  1053. #ifdef CONFIG_DCB
  1054. /* Data Center Bridging netlink ops */
  1055. const struct dcbnl_rtnl_ops *dcbnl_ops;
  1056. #endif
  1057. u8 num_tc;
  1058. struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
  1059. u8 prio_tc_map[TC_BITMASK + 1];
  1060. #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  1061. /* max exchange id for FCoE LRO by ddp */
  1062. unsigned int fcoe_ddp_xid;
  1063. #endif
  1064. /* n-tuple filter list attached to this device */
  1065. struct ethtool_rx_ntuple_list ethtool_ntuple_list;
  1066. /* phy device may attach itself for hardware timestamping */
  1067. struct phy_device *phydev;
  1068. /* group the device belongs to */
  1069. int group;
  1070. };
  1071. #define to_net_dev(d) container_of(d, struct net_device, dev)
  1072. #define NETDEV_ALIGN 32
  1073. static inline
  1074. int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
  1075. {
  1076. return dev->prio_tc_map[prio & TC_BITMASK];
  1077. }
  1078. static inline
  1079. int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
  1080. {
  1081. if (tc >= dev->num_tc)
  1082. return -EINVAL;
  1083. dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
  1084. return 0;
  1085. }
  1086. static inline
  1087. void netdev_reset_tc(struct net_device *dev)
  1088. {
  1089. dev->num_tc = 0;
  1090. memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
  1091. memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
  1092. }
  1093. static inline
  1094. int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
  1095. {
  1096. if (tc >= dev->num_tc)
  1097. return -EINVAL;
  1098. dev->tc_to_txq[tc].count = count;
  1099. dev->tc_to_txq[tc].offset = offset;
  1100. return 0;
  1101. }
  1102. static inline
  1103. int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
  1104. {
  1105. if (num_tc > TC_MAX_QUEUE)
  1106. return -EINVAL;
  1107. dev->num_tc = num_tc;
  1108. return 0;
  1109. }
  1110. static inline
  1111. int netdev_get_num_tc(struct net_device *dev)
  1112. {
  1113. return dev->num_tc;
  1114. }
  1115. static inline
  1116. struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
  1117. unsigned int index)
  1118. {
  1119. return &dev->_tx[index];
  1120. }
  1121. static inline void netdev_for_each_tx_queue(struct net_device *dev,
  1122. void (*f)(struct net_device *,
  1123. struct netdev_queue *,
  1124. void *),
  1125. void *arg)
  1126. {
  1127. unsigned int i;
  1128. for (i = 0; i < dev->num_tx_queues; i++)
  1129. f(dev, &dev->_tx[i], arg);
  1130. }
  1131. /*
  1132. * Net namespace inlines
  1133. */
  1134. static inline
  1135. struct net *dev_net(const struct net_device *dev)
  1136. {
  1137. return read_pnet(&dev->nd_net);
  1138. }
  1139. static inline
  1140. void dev_net_set(struct net_device *dev, struct net *net)
  1141. {
  1142. #ifdef CONFIG_NET_NS
  1143. release_net(dev->nd_net);
  1144. dev->nd_net = hold_net(net);
  1145. #endif
  1146. }
  1147. static inline bool netdev_uses_dsa_tags(struct net_device *dev)
  1148. {
  1149. #ifdef CONFIG_NET_DSA_TAG_DSA
  1150. if (dev->dsa_ptr != NULL)
  1151. return dsa_uses_dsa_tags(dev->dsa_ptr);
  1152. #endif
  1153. return 0;
  1154. }
  1155. #ifndef CONFIG_NET_NS
  1156. static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
  1157. {
  1158. skb->dev = dev;
  1159. }
  1160. #else /* CONFIG_NET_NS */
  1161. void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
  1162. #endif
  1163. static inline bool netdev_uses_trailer_tags(struct net_device *dev)
  1164. {
  1165. #ifdef CONFIG_NET_DSA_TAG_TRAILER
  1166. if (dev->dsa_ptr != NULL)
  1167. return dsa_uses_trailer_tags(dev->dsa_ptr);
  1168. #endif
  1169. return 0;
  1170. }
  1171. /**
  1172. * netdev_priv - access network device private data
  1173. * @dev: network device
  1174. *
  1175. * Get network device private data
  1176. */
  1177. static inline void *netdev_priv(const struct net_device *dev)
  1178. {
  1179. return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
  1180. }
  1181. /* Set the sysfs physical device reference for the network logical device
  1182. * if set prior to registration will cause a symlink during initialization.
  1183. */
  1184. #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
  1185. /* Set the sysfs device type for the network logical device to allow
  1186. * fin grained indentification of different network device types. For
  1187. * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
  1188. */
  1189. #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
  1190. /**
  1191. * netif_napi_add - initialize a napi context
  1192. * @dev: network device
  1193. * @napi: napi context
  1194. * @poll: polling function
  1195. * @weight: default weight
  1196. *
  1197. * netif_napi_add() must be used to initialize a napi context prior to calling
  1198. * *any* of the other napi related functions.
  1199. */
  1200. void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
  1201. int (*poll)(struct napi_struct *, int), int weight);
  1202. /**
  1203. * netif_napi_del - remove a napi context
  1204. * @napi: napi context
  1205. *
  1206. * netif_napi_del() removes a napi context from the network device napi list
  1207. */
  1208. void netif_napi_del(struct napi_struct *napi);
  1209. struct napi_gro_cb {
  1210. /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
  1211. void *frag0;
  1212. /* Length of frag0. */
  1213. unsigned int frag0_len;
  1214. /* This indicates where we are processing relative to skb->data. */
  1215. int data_offset;
  1216. /* This is non-zero if the packet may be of the same flow. */
  1217. int same_flow;
  1218. /* This is non-zero if the packet cannot be merged with the new skb. */
  1219. int flush;
  1220. /* Number of segments aggregated. */
  1221. int count;
  1222. /* Free the skb? */
  1223. int free;
  1224. };
  1225. #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
  1226. struct packet_type {
  1227. __be16 type; /* This is really htons(ether_type). */
  1228. struct net_device *dev; /* NULL is wildcarded here */
  1229. int (*func) (struct sk_buff *,
  1230. struct net_device *,
  1231. struct packet_type *,
  1232. struct net_device *);
  1233. struct sk_buff *(*gso_segment)(struct sk_buff *skb,
  1234. u32 features);
  1235. int (*gso_send_check)(struct sk_buff *skb);
  1236. struct sk_buff **(*gro_receive)(struct sk_buff **head,
  1237. struct sk_buff *skb);
  1238. int (*gro_complete)(struct sk_buff *skb);
  1239. void *af_packet_priv;
  1240. struct list_head list;
  1241. };
  1242. #include <linux/interrupt.h>
  1243. #include <linux/notifier.h>
  1244. extern rwlock_t dev_base_lock; /* Device list lock */
  1245. #define for_each_netdev(net, d) \
  1246. list_for_each_entry(d, &(net)->dev_base_head, dev_list)
  1247. #define for_each_netdev_reverse(net, d) \
  1248. list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
  1249. #define for_each_netdev_rcu(net, d) \
  1250. list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
  1251. #define for_each_netdev_safe(net, d, n) \
  1252. list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
  1253. #define for_each_netdev_continue(net, d) \
  1254. list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
  1255. #define for_each_netdev_continue_rcu(net, d) \
  1256. list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
  1257. #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
  1258. static inline struct net_device *next_net_device(struct net_device *dev)
  1259. {
  1260. struct list_head *lh;
  1261. struct net *net;
  1262. net = dev_net(dev);
  1263. lh = dev->dev_list.next;
  1264. return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
  1265. }
  1266. static inline struct net_device *next_net_device_rcu(struct net_device *dev)
  1267. {
  1268. struct list_head *lh;
  1269. struct net *net;
  1270. net = dev_net(dev);
  1271. lh = rcu_dereference(list_next_rcu(&dev->dev_list));
  1272. return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
  1273. }
  1274. static inline struct net_device *first_net_device(struct net *net)
  1275. {
  1276. return list_empty(&net->dev_base_head) ? NULL :
  1277. net_device_entry(net->dev_base_head.next);
  1278. }
  1279. static inline struct net_device *first_net_device_rcu(struct net *net)
  1280. {
  1281. struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
  1282. return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
  1283. }
  1284. extern int netdev_boot_setup_check(struct net_device *dev);
  1285. extern unsigned long netdev_boot_base(const char *prefix, int unit);
  1286. extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
  1287. const char *hwaddr);
  1288. extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
  1289. extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
  1290. extern void dev_add_pack(struct packet_type *pt);
  1291. extern void dev_remove_pack(struct packet_type *pt);
  1292. extern void __dev_remove_pack(struct packet_type *pt);
  1293. extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
  1294. unsigned short mask);
  1295. extern struct net_device *dev_get_by_name(struct net *net, const char *name);
  1296. extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
  1297. extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
  1298. extern int dev_alloc_name(struct net_device *dev, const char *name);
  1299. extern int dev_open(struct net_device *dev);
  1300. extern int dev_close(struct net_device *dev);
  1301. extern void dev_disable_lro(struct net_device *dev);
  1302. extern int dev_queue_xmit(struct sk_buff *skb);
  1303. extern int register_netdevice(struct net_device *dev);
  1304. extern void unregister_netdevice_queue(struct net_device *dev,
  1305. struct list_head *head);
  1306. extern void unregister_netdevice_many(struct list_head *head);
  1307. static inline void unregister_netdevice(struct net_device *dev)
  1308. {
  1309. unregister_netdevice_queue(dev, NULL);
  1310. }
  1311. extern int netdev_refcnt_read(const struct net_device *dev);
  1312. extern void free_netdev(struct net_device *dev);
  1313. extern void synchronize_net(void);
  1314. extern int register_netdevice_notifier(struct notifier_block *nb);
  1315. extern int unregister_netdevice_notifier(struct notifier_block *nb);
  1316. extern int init_dummy_netdev(struct net_device *dev);
  1317. extern void netdev_resync_ops(struct net_device *dev);
  1318. extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
  1319. extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
  1320. extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
  1321. extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
  1322. extern int dev_restart(struct net_device *dev);
  1323. #ifdef CONFIG_NETPOLL_TRAP
  1324. extern int netpoll_trap(void);
  1325. #endif
  1326. extern int skb_gro_receive(struct sk_buff **head,
  1327. struct sk_buff *skb);
  1328. extern void skb_gro_reset_offset(struct sk_buff *skb);
  1329. static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
  1330. {
  1331. return NAPI_GRO_CB(skb)->data_offset;
  1332. }
  1333. static inline unsigned int skb_gro_len(const struct sk_buff *skb)
  1334. {
  1335. return skb->len - NAPI_GRO_CB(skb)->data_offset;
  1336. }
  1337. static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
  1338. {
  1339. NAPI_GRO_CB(skb)->data_offset += len;
  1340. }
  1341. static inline void *skb_gro_header_fast(struct sk_buff *skb,
  1342. unsigned int offset)
  1343. {
  1344. return NAPI_GRO_CB(skb)->frag0 + offset;
  1345. }
  1346. static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
  1347. {
  1348. return NAPI_GRO_CB(skb)->frag0_len < hlen;
  1349. }
  1350. static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
  1351. unsigned int offset)
  1352. {
  1353. NAPI_GRO_CB(skb)->frag0 = NULL;
  1354. NAPI_GRO_CB(skb)->frag0_len = 0;
  1355. return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
  1356. }
  1357. static inline void *skb_gro_mac_header(struct sk_buff *skb)
  1358. {
  1359. return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
  1360. }
  1361. static inline void *skb_gro_network_header(struct sk_buff *skb)
  1362. {
  1363. return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
  1364. skb_network_offset(skb);
  1365. }
  1366. static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  1367. unsigned short type,
  1368. const void *daddr, const void *saddr,
  1369. unsigned len)
  1370. {
  1371. if (!dev->header_ops || !dev->header_ops->create)
  1372. return 0;
  1373. return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
  1374. }
  1375. static inline int dev_parse_header(const struct sk_buff *skb,
  1376. unsigned char *haddr)
  1377. {
  1378. const struct net_device *dev = skb->dev;
  1379. if (!dev->header_ops || !dev->header_ops->parse)
  1380. return 0;
  1381. return dev->header_ops->parse(skb, haddr);
  1382. }
  1383. typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
  1384. extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
  1385. static inline int unregister_gifconf(unsigned int family)
  1386. {
  1387. return register_gifconf(family, NULL);
  1388. }
  1389. /*
  1390. * Incoming packets are placed on per-cpu queues
  1391. */
  1392. struct softnet_data {
  1393. struct Qdisc *output_queue;
  1394. struct Qdisc **output_queue_tailp;
  1395. struct list_head poll_list;
  1396. struct sk_buff *completion_queue;
  1397. struct sk_buff_head process_queue;
  1398. /* stats */
  1399. unsigned int processed;
  1400. unsigned int time_squeeze;
  1401. unsigned int cpu_collision;
  1402. unsigned int received_rps;
  1403. #ifdef CONFIG_RPS
  1404. struct softnet_data *rps_ipi_list;
  1405. /* Elements below can be accessed between CPUs for RPS */
  1406. struct call_single_data csd ____cacheline_aligned_in_smp;
  1407. struct softnet_data *rps_ipi_next;
  1408. unsigned int cpu;
  1409. unsigned int input_queue_head;
  1410. unsigned int input_queue_tail;
  1411. #endif
  1412. unsigned dropped;
  1413. struct sk_buff_head input_pkt_queue;
  1414. struct napi_struct backlog;
  1415. };
  1416. static inline void input_queue_head_incr(struct softnet_data *sd)
  1417. {
  1418. #ifdef CONFIG_RPS
  1419. sd->input_queue_head++;
  1420. #endif
  1421. }
  1422. static inline void input_queue_tail_incr_save(struct softnet_data *sd,
  1423. unsigned int *qtail)
  1424. {
  1425. #ifdef CONFIG_RPS
  1426. *qtail = ++sd->input_queue_tail;
  1427. #endif
  1428. }
  1429. DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
  1430. #define HAVE_NETIF_QUEUE
  1431. extern void __netif_schedule(struct Qdisc *q);
  1432. static inline void netif_schedule_queue(struct netdev_queue *txq)
  1433. {
  1434. if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
  1435. __netif_schedule(txq->qdisc);
  1436. }
  1437. static inline void netif_tx_schedule_all(struct net_device *dev)
  1438. {
  1439. unsigned int i;
  1440. for (i = 0; i < dev->num_tx_queues; i++)
  1441. netif_schedule_queue(netdev_get_tx_queue(dev, i));
  1442. }
  1443. static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
  1444. {
  1445. clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
  1446. }
  1447. /**
  1448. * netif_start_queue - allow transmit
  1449. * @dev: network device
  1450. *
  1451. * Allow upper layers to call the device hard_start_xmit routine.
  1452. */
  1453. static inline void netif_start_queue(struct net_device *dev)
  1454. {
  1455. netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
  1456. }
  1457. static inline void netif_tx_start_all_queues(struct net_device *dev)
  1458. {
  1459. unsigned int i;
  1460. for (i = 0; i < dev->num_tx_queues; i++) {
  1461. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1462. netif_tx_start_queue(txq);
  1463. }
  1464. }
  1465. static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
  1466. {
  1467. #ifdef CONFIG_NETPOLL_TRAP
  1468. if (netpoll_trap()) {
  1469. netif_tx_start_queue(dev_queue);
  1470. return;
  1471. }
  1472. #endif
  1473. if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
  1474. __netif_schedule(dev_queue->qdisc);
  1475. }
  1476. /**
  1477. * netif_wake_queue - restart transmit
  1478. * @dev: network device
  1479. *
  1480. * Allow upper layers to call the device hard_start_xmit routine.
  1481. * Used for flow control when transmit resources are available.
  1482. */
  1483. static inline void netif_wake_queue(struct net_device *dev)
  1484. {
  1485. netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
  1486. }
  1487. static inline void netif_tx_wake_all_queues(struct net_device *dev)
  1488. {
  1489. unsigned int i;
  1490. for (i = 0; i < dev->num_tx_queues; i++) {
  1491. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1492. netif_tx_wake_queue(txq);
  1493. }
  1494. }
  1495. static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
  1496. {
  1497. if (WARN_ON(!dev_queue)) {
  1498. printk(KERN_INFO "netif_stop_queue() cannot be called before "
  1499. "register_netdev()");
  1500. return;
  1501. }
  1502. set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
  1503. }
  1504. /**
  1505. * netif_stop_queue - stop transmitted packets
  1506. * @dev: network device
  1507. *
  1508. * Stop upper layers calling the device hard_start_xmit routine.
  1509. * Used for flow control when transmit resources are unavailable.
  1510. */
  1511. static inline void netif_stop_queue(struct net_device *dev)
  1512. {
  1513. netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
  1514. }
  1515. static inline void netif_tx_stop_all_queues(struct net_device *dev)
  1516. {
  1517. unsigned int i;
  1518. for (i = 0; i < dev->num_tx_queues; i++) {
  1519. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1520. netif_tx_stop_queue(txq);
  1521. }
  1522. }
  1523. static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
  1524. {
  1525. return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
  1526. }
  1527. /**
  1528. * netif_queue_stopped - test if transmit queue is flowblocked
  1529. * @dev: network device
  1530. *
  1531. * Test if transmit queue on device is currently unable to send.
  1532. */
  1533. static inline int netif_queue_stopped(const struct net_device *dev)
  1534. {
  1535. return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
  1536. }
  1537. static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
  1538. {
  1539. return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
  1540. }
  1541. /**
  1542. * netif_running - test if up
  1543. * @dev: network device
  1544. *
  1545. * Test if the device has been brought up.
  1546. */
  1547. static inline int netif_running(const struct net_device *dev)
  1548. {
  1549. return test_bit(__LINK_STATE_START, &dev->state);
  1550. }
  1551. /*
  1552. * Routines to manage the subqueues on a device. We only need start
  1553. * stop, and a check if it's stopped. All other device management is
  1554. * done at the overall netdevice level.
  1555. * Also test the device if we're multiqueue.
  1556. */
  1557. /**
  1558. * netif_start_subqueue - allow sending packets on subqueue
  1559. * @dev: network device
  1560. * @queue_index: sub queue index
  1561. *
  1562. * Start individual transmit queue of a device with multiple transmit queues.
  1563. */
  1564. static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
  1565. {
  1566. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1567. netif_tx_start_queue(txq);
  1568. }
  1569. /**
  1570. * netif_stop_subqueue - stop sending packets on subqueue
  1571. * @dev: network device
  1572. * @queue_index: sub queue index
  1573. *
  1574. * Stop individual transmit queue of a device with multiple transmit queues.
  1575. */
  1576. static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
  1577. {
  1578. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1579. #ifdef CONFIG_NETPOLL_TRAP
  1580. if (netpoll_trap())
  1581. return;
  1582. #endif
  1583. netif_tx_stop_queue(txq);
  1584. }
  1585. /**
  1586. * netif_subqueue_stopped - test status of subqueue
  1587. * @dev: network device
  1588. * @queue_index: sub queue index
  1589. *
  1590. * Check individual transmit queue of a device with multiple transmit queues.
  1591. */
  1592. static inline int __netif_subqueue_stopped(const struct net_device *dev,
  1593. u16 queue_index)
  1594. {
  1595. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1596. return netif_tx_queue_stopped(txq);
  1597. }
  1598. static inline int netif_subqueue_stopped(const struct net_device *dev,
  1599. struct sk_buff *skb)
  1600. {
  1601. return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
  1602. }
  1603. /**
  1604. * netif_wake_subqueue - allow sending packets on subqueue
  1605. * @dev: network device
  1606. * @queue_index: sub queue index
  1607. *
  1608. * Resume individual transmit queue of a device with multiple transmit queues.
  1609. */
  1610. static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
  1611. {
  1612. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1613. #ifdef CONFIG_NETPOLL_TRAP
  1614. if (netpoll_trap())
  1615. return;
  1616. #endif
  1617. if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
  1618. __netif_schedule(txq->qdisc);
  1619. }
  1620. /*
  1621. * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
  1622. * as a distribution range limit for the returned value.
  1623. */
  1624. static inline u16 skb_tx_hash(const struct net_device *dev,
  1625. const struct sk_buff *skb)
  1626. {
  1627. return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
  1628. }
  1629. /**
  1630. * netif_is_multiqueue - test if device has multiple transmit queues
  1631. * @dev: network device
  1632. *
  1633. * Check if device has multiple transmit queues
  1634. */
  1635. static inline int netif_is_multiqueue(const struct net_device *dev)
  1636. {
  1637. return dev->num_tx_queues > 1;
  1638. }
  1639. extern int netif_set_real_num_tx_queues(struct net_device *dev,
  1640. unsigned int txq);
  1641. #ifdef CONFIG_RPS
  1642. extern int netif_set_real_num_rx_queues(struct net_device *dev,
  1643. unsigned int rxq);
  1644. #else
  1645. static inline int netif_set_real_num_rx_queues(struct net_device *dev,
  1646. unsigned int rxq)
  1647. {
  1648. return 0;
  1649. }
  1650. #endif
  1651. static inline int netif_copy_real_num_queues(struct net_device *to_dev,
  1652. const struct net_device *from_dev)
  1653. {
  1654. netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
  1655. #ifdef CONFIG_RPS
  1656. return netif_set_real_num_rx_queues(to_dev,
  1657. from_dev->real_num_rx_queues);
  1658. #else
  1659. return 0;
  1660. #endif
  1661. }
  1662. /* Use this variant when it is known for sure that it
  1663. * is executing from hardware interrupt context or with hardware interrupts
  1664. * disabled.
  1665. */
  1666. extern void dev_kfree_skb_irq(struct sk_buff *skb);
  1667. /* Use this variant in places where it could be invoked
  1668. * from either hardware interrupt or other context, with hardware interrupts
  1669. * either disabled or enabled.
  1670. */
  1671. extern void dev_kfree_skb_any(struct sk_buff *skb);
  1672. #define HAVE_NETIF_RX 1
  1673. extern int netif_rx(struct sk_buff *skb);
  1674. extern int netif_rx_ni(struct sk_buff *skb);
  1675. #define HAVE_NETIF_RECEIVE_SKB 1
  1676. extern int netif_receive_skb(struct sk_buff *skb);
  1677. extern gro_result_t dev_gro_receive(struct napi_struct *napi,
  1678. struct sk_buff *skb);
  1679. extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
  1680. extern gro_result_t napi_gro_receive(struct napi_struct *napi,
  1681. struct sk_buff *skb);
  1682. extern void napi_gro_flush(struct napi_struct *napi);
  1683. extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
  1684. extern gro_result_t napi_frags_finish(struct napi_struct *napi,
  1685. struct sk_buff *skb,
  1686. gro_result_t ret);
  1687. extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
  1688. extern gro_result_t napi_gro_frags(struct napi_struct *napi);
  1689. static inline void napi_free_frags(struct napi_struct *napi)
  1690. {
  1691. kfree_skb(napi->skb);
  1692. napi->skb = NULL;
  1693. }
  1694. extern int netdev_rx_handler_register(struct net_device *dev,
  1695. rx_handler_func_t *rx_handler,
  1696. void *rx_handler_data);
  1697. extern void netdev_rx_handler_unregister(struct net_device *dev);
  1698. extern int dev_valid_name(const char *name);
  1699. extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
  1700. extern int dev_ethtool(struct net *net, struct ifreq *);
  1701. extern unsigned dev_get_flags(const struct net_device *);
  1702. extern int __dev_change_flags(struct net_device *, unsigned int flags);
  1703. extern int dev_change_flags(struct net_device *, unsigned);
  1704. extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
  1705. extern int dev_change_name(struct net_device *, const char *);
  1706. extern int dev_set_alias(struct net_device *, const char *, size_t);
  1707. extern int dev_change_net_namespace(struct net_device *,
  1708. struct net *, const char *);
  1709. extern int dev_set_mtu(struct net_device *, int);
  1710. extern void dev_set_group(struct net_device *, int);
  1711. extern int dev_set_mac_address(struct net_device *,
  1712. struct sockaddr *);
  1713. extern int dev_hard_start_xmit(struct sk_buff *skb,
  1714. struct net_device *dev,
  1715. struct netdev_queue *txq);
  1716. extern int dev_forward_skb(struct net_device *dev,
  1717. struct sk_buff *skb);
  1718. extern int netdev_budget;
  1719. /* Called by rtnetlink.c:rtnl_unlock() */
  1720. extern void netdev_run_todo(void);
  1721. /**
  1722. * dev_put - release reference to device
  1723. * @dev: network device
  1724. *
  1725. * Release reference to device to allow it to be freed.
  1726. */
  1727. static inline void dev_put(struct net_device *dev)
  1728. {
  1729. irqsafe_cpu_dec(*dev->pcpu_refcnt);
  1730. }
  1731. /**
  1732. * dev_hold - get reference to device
  1733. * @dev: network device
  1734. *
  1735. * Hold reference to device to keep it from being freed.
  1736. */
  1737. static inline void dev_hold(struct net_device *dev)
  1738. {
  1739. irqsafe_cpu_inc(*dev->pcpu_refcnt);
  1740. }
  1741. /* Carrier loss detection, dial on demand. The functions netif_carrier_on
  1742. * and _off may be called from IRQ context, but it is caller
  1743. * who is responsible for serialization of these calls.
  1744. *
  1745. * The name carrier is inappropriate, these functions should really be
  1746. * called netif_lowerlayer_*() because they represent the state of any
  1747. * kind of lower layer not just hardware media.
  1748. */
  1749. extern void linkwatch_fire_event(struct net_device *dev);
  1750. extern void linkwatch_forget_dev(struct net_device *dev);
  1751. /**
  1752. * netif_carrier_ok - test if carrier present
  1753. * @dev: network device
  1754. *
  1755. * Check if carrier is present on device
  1756. */
  1757. static inline int netif_carrier_ok(const struct net_device *dev)
  1758. {
  1759. return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
  1760. }
  1761. extern unsigned long dev_trans_start(struct net_device *dev);
  1762. extern void __netdev_watchdog_up(struct net_device *dev);
  1763. extern void netif_carrier_on(struct net_device *dev);
  1764. extern void netif_carrier_off(struct net_device *dev);
  1765. extern void netif_notify_peers(struct net_device *dev);
  1766. /**
  1767. * netif_dormant_on - mark device as dormant.
  1768. * @dev: network device
  1769. *
  1770. * Mark device as dormant (as per RFC2863).
  1771. *
  1772. * The dormant state indicates that the relevant interface is not
  1773. * actually in a condition to pass packets (i.e., it is not 'up') but is
  1774. * in a "pending" state, waiting for some external event. For "on-
  1775. * demand" interfaces, this new state identifies the situation where the
  1776. * interface is waiting for events to place it in the up state.
  1777. *
  1778. */
  1779. static inline void netif_dormant_on(struct net_device *dev)
  1780. {
  1781. if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
  1782. linkwatch_fire_event(dev);
  1783. }
  1784. /**
  1785. * netif_dormant_off - set device as not dormant.
  1786. * @dev: network device
  1787. *
  1788. * Device is not in dormant state.
  1789. */
  1790. static inline void netif_dormant_off(struct net_device *dev)
  1791. {
  1792. if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
  1793. linkwatch_fire_event(dev);
  1794. }
  1795. /**
  1796. * netif_dormant - test if carrier present
  1797. * @dev: network device
  1798. *
  1799. * Check if carrier is present on device
  1800. */
  1801. static inline int netif_dormant(const struct net_device *dev)
  1802. {
  1803. return test_bit(__LINK_STATE_DORMANT, &dev->state);
  1804. }
  1805. /**
  1806. * netif_oper_up - test if device is operational
  1807. * @dev: network device
  1808. *
  1809. * Check if carrier is operational
  1810. */
  1811. static inline int netif_oper_up(const struct net_device *dev)
  1812. {
  1813. return (dev->operstate == IF_OPER_UP ||
  1814. dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
  1815. }
  1816. /**
  1817. * netif_device_present - is device available or removed
  1818. * @dev: network device
  1819. *
  1820. * Check if device has not been removed from system.
  1821. */
  1822. static inline int netif_device_present(struct net_device *dev)
  1823. {
  1824. return test_bit(__LINK_STATE_PRESENT, &dev->state);
  1825. }
  1826. extern void netif_device_detach(struct net_device *dev);
  1827. extern void netif_device_attach(struct net_device *dev);
  1828. /*
  1829. * Network interface message level settings
  1830. */
  1831. #define HAVE_NETIF_MSG 1
  1832. enum {
  1833. NETIF_MSG_DRV = 0x0001,
  1834. NETIF_MSG_PROBE = 0x0002,
  1835. NETIF_MSG_LINK = 0x0004,
  1836. NETIF_MSG_TIMER = 0x0008,
  1837. NETIF_MSG_IFDOWN = 0x0010,
  1838. NETIF_MSG_IFUP = 0x0020,
  1839. NETIF_MSG_RX_ERR = 0x0040,
  1840. NETIF_MSG_TX_ERR = 0x0080,
  1841. NETIF_MSG_TX_QUEUED = 0x0100,
  1842. NETIF_MSG_INTR = 0x0200,
  1843. NETIF_MSG_TX_DONE = 0x0400,
  1844. NETIF_MSG_RX_STATUS = 0x0800,
  1845. NETIF_MSG_PKTDATA = 0x1000,
  1846. NETIF_MSG_HW = 0x2000,
  1847. NETIF_MSG_WOL = 0x4000,
  1848. };
  1849. #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
  1850. #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
  1851. #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
  1852. #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
  1853. #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
  1854. #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
  1855. #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
  1856. #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
  1857. #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
  1858. #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
  1859. #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
  1860. #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
  1861. #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
  1862. #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
  1863. #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
  1864. static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
  1865. {
  1866. /* use default */
  1867. if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
  1868. return default_msg_enable_bits;
  1869. if (debug_value == 0) /* no output */
  1870. return 0;
  1871. /* set low N bits */
  1872. return (1 << debug_value) - 1;
  1873. }
  1874. static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
  1875. {
  1876. spin_lock(&txq->_xmit_lock);
  1877. txq->xmit_lock_owner = cpu;
  1878. }
  1879. static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
  1880. {
  1881. spin_lock_bh(&txq->_xmit_lock);
  1882. txq->xmit_lock_owner = smp_processor_id();
  1883. }
  1884. static inline int __netif_tx_trylock(struct netdev_queue *txq)
  1885. {
  1886. int ok = spin_trylock(&txq->_xmit_lock);
  1887. if (likely(ok))
  1888. txq->xmit_lock_owner = smp_processor_id();
  1889. return ok;
  1890. }
  1891. static inline void __netif_tx_unlock(struct netdev_queue *txq)
  1892. {
  1893. txq->xmit_lock_owner = -1;
  1894. spin_unlock(&txq->_xmit_lock);
  1895. }
  1896. static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
  1897. {
  1898. txq->xmit_lock_owner = -1;
  1899. spin_unlock_bh(&txq->_xmit_lock);
  1900. }
  1901. static inline void txq_trans_update(struct netdev_queue *txq)
  1902. {
  1903. if (txq->xmit_lock_owner != -1)
  1904. txq->trans_start = jiffies;
  1905. }
  1906. /**
  1907. * netif_tx_lock - grab network device transmit lock
  1908. * @dev: network device
  1909. *
  1910. * Get network device transmit lock
  1911. */
  1912. static inline void netif_tx_lock(struct net_device *dev)
  1913. {
  1914. unsigned int i;
  1915. int cpu;
  1916. spin_lock(&dev->tx_global_lock);
  1917. cpu = smp_processor_id();
  1918. for (i = 0; i < dev->num_tx_queues; i++) {
  1919. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1920. /* We are the only thread of execution doing a
  1921. * freeze, but we have to grab the _xmit_lock in
  1922. * order to synchronize with threads which are in
  1923. * the ->hard_start_xmit() handler and already
  1924. * checked the frozen bit.
  1925. */
  1926. __netif_tx_lock(txq, cpu);
  1927. set_bit(__QUEUE_STATE_FROZEN, &txq->state);
  1928. __netif_tx_unlock(txq);
  1929. }
  1930. }
  1931. static inline void netif_tx_lock_bh(struct net_device *dev)
  1932. {
  1933. local_bh_disable();
  1934. netif_tx_lock(dev);
  1935. }
  1936. static inline void netif_tx_unlock(struct net_device *dev)
  1937. {
  1938. unsigned int i;
  1939. for (i = 0; i < dev->num_tx_queues; i++) {
  1940. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1941. /* No need to grab the _xmit_lock here. If the
  1942. * queue is not stopped for another reason, we
  1943. * force a schedule.
  1944. */
  1945. clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
  1946. netif_schedule_queue(txq);
  1947. }
  1948. spin_unlock(&dev->tx_global_lock);
  1949. }
  1950. static inline void netif_tx_unlock_bh(struct net_device *dev)
  1951. {
  1952. netif_tx_unlock(dev);
  1953. local_bh_enable();
  1954. }
  1955. #define HARD_TX_LOCK(dev, txq, cpu) { \
  1956. if ((dev->features & NETIF_F_LLTX) == 0) { \
  1957. __netif_tx_lock(txq, cpu); \
  1958. } \
  1959. }
  1960. #define HARD_TX_UNLOCK(dev, txq) { \
  1961. if ((dev->features & NETIF_F_LLTX) == 0) { \
  1962. __netif_tx_unlock(txq); \
  1963. } \
  1964. }
  1965. static inline void netif_tx_disable(struct net_device *dev)
  1966. {
  1967. unsigned int i;
  1968. int cpu;
  1969. local_bh_disable();
  1970. cpu = smp_processor_id();
  1971. for (i = 0; i < dev->num_tx_queues; i++) {
  1972. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1973. __netif_tx_lock(txq, cpu);
  1974. netif_tx_stop_queue(txq);
  1975. __netif_tx_unlock(txq);
  1976. }
  1977. local_bh_enable();
  1978. }
  1979. static inline void netif_addr_lock(struct net_device *dev)
  1980. {
  1981. spin_lock(&dev->addr_list_lock);
  1982. }
  1983. static inline void netif_addr_lock_bh(struct net_device *dev)
  1984. {
  1985. spin_lock_bh(&dev->addr_list_lock);
  1986. }
  1987. static inline void netif_addr_unlock(struct net_device *dev)
  1988. {
  1989. spin_unlock(&dev->addr_list_lock);
  1990. }
  1991. static inline void netif_addr_unlock_bh(struct net_device *dev)
  1992. {
  1993. spin_unlock_bh(&dev->addr_list_lock);
  1994. }
  1995. /*
  1996. * dev_addrs walker. Should be used only for read access. Call with
  1997. * rcu_read_lock held.
  1998. */
  1999. #define for_each_dev_addr(dev, ha) \
  2000. list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
  2001. /* These functions live elsewhere (drivers/net/net_init.c, but related) */
  2002. extern void ether_setup(struct net_device *dev);
  2003. /* Support for loadable net-drivers */
  2004. extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
  2005. void (*setup)(struct net_device *),
  2006. unsigned int txqs, unsigned int rxqs);
  2007. #define alloc_netdev(sizeof_priv, name, setup) \
  2008. alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
  2009. #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
  2010. alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
  2011. extern int register_netdev(struct net_device *dev);
  2012. extern void unregister_netdev(struct net_device *dev);
  2013. /* General hardware address lists handling functions */
  2014. extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
  2015. struct netdev_hw_addr_list *from_list,
  2016. int addr_len, unsigned char addr_type);
  2017. extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
  2018. struct netdev_hw_addr_list *from_list,
  2019. int addr_len, unsigned char addr_type);
  2020. extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
  2021. struct netdev_hw_addr_list *from_list,
  2022. int addr_len);
  2023. extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
  2024. struct netdev_hw_addr_list *from_list,
  2025. int addr_len);
  2026. extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
  2027. extern void __hw_addr_init(struct netdev_hw_addr_list *list);
  2028. /* Functions used for device addresses handling */
  2029. extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
  2030. unsigned char addr_type);
  2031. extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
  2032. unsigned char addr_type);
  2033. extern int dev_addr_add_multiple(struct net_device *to_dev,
  2034. struct net_device *from_dev,
  2035. unsigned char addr_type);
  2036. extern int dev_addr_del_multiple(struct net_device *to_dev,
  2037. struct net_device *from_dev,
  2038. unsigned char addr_type);
  2039. extern void dev_addr_flush(struct net_device *dev);
  2040. extern int dev_addr_init(struct net_device *dev);
  2041. /* Functions used for unicast addresses handling */
  2042. extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
  2043. extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
  2044. extern int dev_uc_sync(struct net_device *to, struct net_device *from);
  2045. extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
  2046. extern void dev_uc_flush(struct net_device *dev);
  2047. extern void dev_uc_init(struct net_device *dev);
  2048. /* Functions used for multicast addresses handling */
  2049. extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
  2050. extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
  2051. extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
  2052. extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
  2053. extern int dev_mc_sync(struct net_device *to, struct net_device *from);
  2054. extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
  2055. extern void dev_mc_flush(struct net_device *dev);
  2056. extern void dev_mc_init(struct net_device *dev);
  2057. /* Functions used for secondary unicast and multicast support */
  2058. extern void dev_set_rx_mode(struct net_device *dev);
  2059. extern void __dev_set_rx_mode(struct net_device *dev);
  2060. extern int dev_set_promiscuity(struct net_device *dev, int inc);
  2061. extern int dev_set_allmulti(struct net_device *dev, int inc);
  2062. extern void netdev_state_change(struct net_device *dev);
  2063. extern int netdev_bonding_change(struct net_device *dev,
  2064. unsigned long event);
  2065. extern void netdev_features_change(struct net_device *dev);
  2066. /* Load a device via the kmod */
  2067. extern void dev_load(struct net *net, const char *name);
  2068. extern void dev_mcast_init(void);
  2069. extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
  2070. struct rtnl_link_stats64 *storage);
  2071. extern int netdev_max_backlog;
  2072. extern int netdev_tstamp_prequeue;
  2073. extern int weight_p;
  2074. extern int netdev_set_master(struct net_device *dev, struct net_device *master);
  2075. extern int netdev_set_bond_master(struct net_device *dev,
  2076. struct net_device *master);
  2077. extern int skb_checksum_help(struct sk_buff *skb);
  2078. extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
  2079. #ifdef CONFIG_BUG
  2080. extern void netdev_rx_csum_fault(struct net_device *dev);
  2081. #else
  2082. static inline void netdev_rx_csum_fault(struct net_device *dev)
  2083. {
  2084. }
  2085. #endif
  2086. /* rx skb timestamps */
  2087. extern void net_enable_timestamp(void);
  2088. extern void net_disable_timestamp(void);
  2089. #ifdef CONFIG_PROC_FS
  2090. extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
  2091. extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  2092. extern void dev_seq_stop(struct seq_file *seq, void *v);
  2093. #endif
  2094. extern int netdev_class_create_file(struct class_attribute *class_attr);
  2095. extern void netdev_class_remove_file(struct class_attribute *class_attr);
  2096. extern struct kobj_ns_type_operations net_ns_type_operations;
  2097. extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
  2098. extern void linkwatch_run_queue(void);
  2099. u32 netdev_increment_features(u32 all, u32 one, u32 mask);
  2100. u32 netdev_fix_features(struct net_device *dev, u32 features);
  2101. void netif_stacked_transfer_operstate(const struct net_device *rootdev,
  2102. struct net_device *dev);
  2103. u32 netif_skb_features(struct sk_buff *skb);
  2104. static inline int net_gso_ok(u32 features, int gso_type)
  2105. {
  2106. int feature = gso_type << NETIF_F_GSO_SHIFT;
  2107. return (features & feature) == feature;
  2108. }
  2109. static inline int skb_gso_ok(struct sk_buff *skb, u32 features)
  2110. {
  2111. return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
  2112. (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
  2113. }
  2114. static inline int netif_needs_gso(struct sk_buff *skb, int features)
  2115. {
  2116. return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
  2117. unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
  2118. }
  2119. static inline void netif_set_gso_max_size(struct net_device *dev,
  2120. unsigned int size)
  2121. {
  2122. dev->gso_max_size = size;
  2123. }
  2124. static inline int netif_is_bond_slave(struct net_device *dev)
  2125. {
  2126. return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
  2127. }
  2128. extern struct pernet_operations __net_initdata loopback_net_ops;
  2129. static inline int dev_ethtool_get_settings(struct net_device *dev,
  2130. struct ethtool_cmd *cmd)
  2131. {
  2132. if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
  2133. return -EOPNOTSUPP;
  2134. return dev->ethtool_ops->get_settings(dev, cmd);
  2135. }
  2136. static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
  2137. {
  2138. if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
  2139. return 0;
  2140. return dev->ethtool_ops->get_rx_csum(dev);
  2141. }
  2142. static inline u32 dev_ethtool_get_flags(struct net_device *dev)
  2143. {
  2144. if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
  2145. return 0;
  2146. return dev->ethtool_ops->get_flags(dev);
  2147. }
  2148. /* Logging, debugging and troubleshooting/diagnostic helpers. */
  2149. /* netdev_printk helpers, similar to dev_printk */
  2150. static inline const char *netdev_name(const struct net_device *dev)
  2151. {
  2152. if (dev->reg_state != NETREG_REGISTERED)
  2153. return "(unregistered net_device)";
  2154. return dev->name;
  2155. }
  2156. extern int netdev_printk(const char *level, const struct net_device *dev,
  2157. const char *format, ...)
  2158. __attribute__ ((format (printf, 3, 4)));
  2159. extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
  2160. __attribute__ ((format (printf, 2, 3)));
  2161. extern int netdev_alert(const struct net_device *dev, const char *format, ...)
  2162. __attribute__ ((format (printf, 2, 3)));
  2163. extern int netdev_crit(const struct net_device *dev, const char *format, ...)
  2164. __attribute__ ((format (printf, 2, 3)));
  2165. extern int netdev_err(const struct net_device *dev, const char *format, ...)
  2166. __attribute__ ((format (printf, 2, 3)));
  2167. extern int netdev_warn(const struct net_device *dev, const char *format, ...)
  2168. __attribute__ ((format (printf, 2, 3)));
  2169. extern int netdev_notice(const struct net_device *dev, const char *format, ...)
  2170. __attribute__ ((format (printf, 2, 3)));
  2171. extern int netdev_info(const struct net_device *dev, const char *format, ...)
  2172. __attribute__ ((format (printf, 2, 3)));
  2173. #if defined(DEBUG)
  2174. #define netdev_dbg(__dev, format, args...) \
  2175. netdev_printk(KERN_DEBUG, __dev, format, ##args)
  2176. #elif defined(CONFIG_DYNAMIC_DEBUG)
  2177. #define netdev_dbg(__dev, format, args...) \
  2178. do { \
  2179. dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
  2180. netdev_name(__dev), ##args); \
  2181. } while (0)
  2182. #else
  2183. #define netdev_dbg(__dev, format, args...) \
  2184. ({ \
  2185. if (0) \
  2186. netdev_printk(KERN_DEBUG, __dev, format, ##args); \
  2187. 0; \
  2188. })
  2189. #endif
  2190. #if defined(VERBOSE_DEBUG)
  2191. #define netdev_vdbg netdev_dbg
  2192. #else
  2193. #define netdev_vdbg(dev, format, args...) \
  2194. ({ \
  2195. if (0) \
  2196. netdev_printk(KERN_DEBUG, dev, format, ##args); \
  2197. 0; \
  2198. })
  2199. #endif
  2200. /*
  2201. * netdev_WARN() acts like dev_printk(), but with the key difference
  2202. * of using a WARN/WARN_ON to get the message out, including the
  2203. * file/line information and a backtrace.
  2204. */
  2205. #define netdev_WARN(dev, format, args...) \
  2206. WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
  2207. /* netif printk helpers, similar to netdev_printk */
  2208. #define netif_printk(priv, type, level, dev, fmt, args...) \
  2209. do { \
  2210. if (netif_msg_##type(priv)) \
  2211. netdev_printk(level, (dev), fmt, ##args); \
  2212. } while (0)
  2213. #define netif_level(level, priv, type, dev, fmt, args...) \
  2214. do { \
  2215. if (netif_msg_##type(priv)) \
  2216. netdev_##level(dev, fmt, ##args); \
  2217. } while (0)
  2218. #define netif_emerg(priv, type, dev, fmt, args...) \
  2219. netif_level(emerg, priv, type, dev, fmt, ##args)
  2220. #define netif_alert(priv, type, dev, fmt, args...) \
  2221. netif_level(alert, priv, type, dev, fmt, ##args)
  2222. #define netif_crit(priv, type, dev, fmt, args...) \
  2223. netif_level(crit, priv, type, dev, fmt, ##args)
  2224. #define netif_err(priv, type, dev, fmt, args...) \
  2225. netif_level(err, priv, type, dev, fmt, ##args)
  2226. #define netif_warn(priv, type, dev, fmt, args...) \
  2227. netif_level(warn, priv, type, dev, fmt, ##args)
  2228. #define netif_notice(priv, type, dev, fmt, args...) \
  2229. netif_level(notice, priv, type, dev, fmt, ##args)
  2230. #define netif_info(priv, type, dev, fmt, args...) \
  2231. netif_level(info, priv, type, dev, fmt, ##args)
  2232. #if defined(DEBUG)
  2233. #define netif_dbg(priv, type, dev, format, args...) \
  2234. netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
  2235. #elif defined(CONFIG_DYNAMIC_DEBUG)
  2236. #define netif_dbg(priv, type, netdev, format, args...) \
  2237. do { \
  2238. if (netif_msg_##type(priv)) \
  2239. dynamic_dev_dbg((netdev)->dev.parent, \
  2240. "%s: " format, \
  2241. netdev_name(netdev), ##args); \
  2242. } while (0)
  2243. #else
  2244. #define netif_dbg(priv, type, dev, format, args...) \
  2245. ({ \
  2246. if (0) \
  2247. netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
  2248. 0; \
  2249. })
  2250. #endif
  2251. #if defined(VERBOSE_DEBUG)
  2252. #define netif_vdbg netif_dbg
  2253. #else
  2254. #define netif_vdbg(priv, type, dev, format, args...) \
  2255. ({ \
  2256. if (0) \
  2257. netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
  2258. 0; \
  2259. })
  2260. #endif
  2261. #endif /* __KERNEL__ */
  2262. #endif /* _LINUX_NETDEVICE_H */