netdevice.h 67 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/timer.h>
  33. #include <linux/delay.h>
  34. #include <linux/mm.h>
  35. #include <asm/atomic.h>
  36. #include <asm/cache.h>
  37. #include <asm/byteorder.h>
  38. #include <linux/device.h>
  39. #include <linux/percpu.h>
  40. #include <linux/rculist.h>
  41. #include <linux/dmaengine.h>
  42. #include <linux/workqueue.h>
  43. #include <linux/ethtool.h>
  44. #include <net/net_namespace.h>
  45. #include <net/dsa.h>
  46. #ifdef CONFIG_DCB
  47. #include <net/dcbnl.h>
  48. #endif
  49. struct vlan_group;
  50. struct netpoll_info;
  51. /* 802.11 specific */
  52. struct wireless_dev;
  53. /* source back-compat hooks */
  54. #define SET_ETHTOOL_OPS(netdev,ops) \
  55. ( (netdev)->ethtool_ops = (ops) )
  56. #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
  57. functions are available. */
  58. #define HAVE_FREE_NETDEV /* free_netdev() */
  59. #define HAVE_NETDEV_PRIV /* netdev_priv() */
  60. /* Backlog congestion levels */
  61. #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
  62. #define NET_RX_DROP 1 /* packet dropped */
  63. /*
  64. * Transmit return codes: transmit return codes originate from three different
  65. * namespaces:
  66. *
  67. * - qdisc return codes
  68. * - driver transmit return codes
  69. * - errno values
  70. *
  71. * Drivers are allowed to return any one of those in their hard_start_xmit()
  72. * function. Real network devices commonly used with qdiscs should only return
  73. * the driver transmit return codes though - when qdiscs are used, the actual
  74. * transmission happens asynchronously, so the value is not propagated to
  75. * higher layers. Virtual network devices transmit synchronously, in this case
  76. * the driver transmit return codes are consumed by dev_queue_xmit(), all
  77. * others are propagated to higher layers.
  78. */
  79. /* qdisc ->enqueue() return codes. */
  80. #define NET_XMIT_SUCCESS 0x00
  81. #define NET_XMIT_DROP 0x01 /* skb dropped */
  82. #define NET_XMIT_CN 0x02 /* congestion notification */
  83. #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
  84. #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
  85. /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
  86. * indicates that the device will soon be dropping packets, or already drops
  87. * some packets of the same priority; prompting us to send less aggressively. */
  88. #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
  89. #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
  90. /* Driver transmit return codes */
  91. #define NETDEV_TX_MASK 0xf0
  92. enum netdev_tx {
  93. __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
  94. NETDEV_TX_OK = 0x00, /* driver took care of packet */
  95. NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
  96. NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
  97. };
  98. typedef enum netdev_tx netdev_tx_t;
  99. /*
  100. * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
  101. * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
  102. */
  103. static inline bool dev_xmit_complete(int rc)
  104. {
  105. /*
  106. * Positive cases with an skb consumed by a driver:
  107. * - successful transmission (rc == NETDEV_TX_OK)
  108. * - error while transmitting (rc < 0)
  109. * - error while queueing to a different device (rc & NET_XMIT_MASK)
  110. */
  111. if (likely(rc < NET_XMIT_MASK))
  112. return true;
  113. return false;
  114. }
  115. #endif
  116. #define MAX_ADDR_LEN 32 /* Largest hardware address length */
  117. #ifdef __KERNEL__
  118. /*
  119. * Compute the worst case header length according to the protocols
  120. * used.
  121. */
  122. #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
  123. # if defined(CONFIG_MAC80211_MESH)
  124. # define LL_MAX_HEADER 128
  125. # else
  126. # define LL_MAX_HEADER 96
  127. # endif
  128. #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
  129. # define LL_MAX_HEADER 48
  130. #else
  131. # define LL_MAX_HEADER 32
  132. #endif
  133. #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
  134. !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
  135. !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
  136. !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
  137. #define MAX_HEADER LL_MAX_HEADER
  138. #else
  139. #define MAX_HEADER (LL_MAX_HEADER + 48)
  140. #endif
  141. #endif /* __KERNEL__ */
  142. /*
  143. * Network device statistics. Akin to the 2.0 ether stats but
  144. * with byte counters.
  145. */
  146. struct net_device_stats {
  147. unsigned long rx_packets; /* total packets received */
  148. unsigned long tx_packets; /* total packets transmitted */
  149. unsigned long rx_bytes; /* total bytes received */
  150. unsigned long tx_bytes; /* total bytes transmitted */
  151. unsigned long rx_errors; /* bad packets received */
  152. unsigned long tx_errors; /* packet transmit problems */
  153. unsigned long rx_dropped; /* no space in linux buffers */
  154. unsigned long tx_dropped; /* no space available in linux */
  155. unsigned long multicast; /* multicast packets received */
  156. unsigned long collisions;
  157. /* detailed rx_errors: */
  158. unsigned long rx_length_errors;
  159. unsigned long rx_over_errors; /* receiver ring buff overflow */
  160. unsigned long rx_crc_errors; /* recved pkt with crc error */
  161. unsigned long rx_frame_errors; /* recv'd frame alignment error */
  162. unsigned long rx_fifo_errors; /* recv'r fifo overrun */
  163. unsigned long rx_missed_errors; /* receiver missed packet */
  164. /* detailed tx_errors */
  165. unsigned long tx_aborted_errors;
  166. unsigned long tx_carrier_errors;
  167. unsigned long tx_fifo_errors;
  168. unsigned long tx_heartbeat_errors;
  169. unsigned long tx_window_errors;
  170. /* for cslip etc */
  171. unsigned long rx_compressed;
  172. unsigned long tx_compressed;
  173. };
  174. /* Media selection options. */
  175. enum {
  176. IF_PORT_UNKNOWN = 0,
  177. IF_PORT_10BASE2,
  178. IF_PORT_10BASET,
  179. IF_PORT_AUI,
  180. IF_PORT_100BASET,
  181. IF_PORT_100BASETX,
  182. IF_PORT_100BASEFX
  183. };
  184. #ifdef __KERNEL__
  185. #include <linux/cache.h>
  186. #include <linux/skbuff.h>
  187. struct neighbour;
  188. struct neigh_parms;
  189. struct sk_buff;
  190. struct netif_rx_stats {
  191. unsigned total;
  192. unsigned dropped;
  193. unsigned time_squeeze;
  194. unsigned cpu_collision;
  195. };
  196. DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
  197. struct dev_addr_list {
  198. struct dev_addr_list *next;
  199. u8 da_addr[MAX_ADDR_LEN];
  200. u8 da_addrlen;
  201. u8 da_synced;
  202. int da_users;
  203. int da_gusers;
  204. };
  205. /*
  206. * We tag multicasts with these structures.
  207. */
  208. #define dev_mc_list dev_addr_list
  209. #define dmi_addr da_addr
  210. #define dmi_addrlen da_addrlen
  211. #define dmi_users da_users
  212. #define dmi_gusers da_gusers
  213. struct netdev_hw_addr {
  214. struct list_head list;
  215. unsigned char addr[MAX_ADDR_LEN];
  216. unsigned char type;
  217. #define NETDEV_HW_ADDR_T_LAN 1
  218. #define NETDEV_HW_ADDR_T_SAN 2
  219. #define NETDEV_HW_ADDR_T_SLAVE 3
  220. #define NETDEV_HW_ADDR_T_UNICAST 4
  221. int refcount;
  222. bool synced;
  223. struct rcu_head rcu_head;
  224. };
  225. struct netdev_hw_addr_list {
  226. struct list_head list;
  227. int count;
  228. };
  229. #define netdev_uc_count(dev) ((dev)->uc.count)
  230. #define netdev_uc_empty(dev) ((dev)->uc.count == 0)
  231. #define netdev_for_each_uc_addr(ha, dev) \
  232. list_for_each_entry(ha, &dev->uc.list, list)
  233. #define netdev_mc_count(dev) ((dev)->mc_count)
  234. #define netdev_mc_empty(dev) (netdev_mc_count(dev) == 0)
  235. #define netdev_for_each_mc_addr(mclist, dev) \
  236. for (mclist = dev->mc_list; mclist; mclist = mclist->next)
  237. struct hh_cache {
  238. struct hh_cache *hh_next; /* Next entry */
  239. atomic_t hh_refcnt; /* number of users */
  240. /*
  241. * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
  242. * cache line on SMP.
  243. * They are mostly read, but hh_refcnt may be changed quite frequently,
  244. * incurring cache line ping pongs.
  245. */
  246. __be16 hh_type ____cacheline_aligned_in_smp;
  247. /* protocol identifier, f.e ETH_P_IP
  248. * NOTE: For VLANs, this will be the
  249. * encapuslated type. --BLG
  250. */
  251. u16 hh_len; /* length of header */
  252. int (*hh_output)(struct sk_buff *skb);
  253. seqlock_t hh_lock;
  254. /* cached hardware header; allow for machine alignment needs. */
  255. #define HH_DATA_MOD 16
  256. #define HH_DATA_OFF(__len) \
  257. (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
  258. #define HH_DATA_ALIGN(__len) \
  259. (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
  260. unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
  261. };
  262. /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
  263. * Alternative is:
  264. * dev->hard_header_len ? (dev->hard_header_len +
  265. * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
  266. *
  267. * We could use other alignment values, but we must maintain the
  268. * relationship HH alignment <= LL alignment.
  269. *
  270. * LL_ALLOCATED_SPACE also takes into account the tailroom the device
  271. * may need.
  272. */
  273. #define LL_RESERVED_SPACE(dev) \
  274. ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  275. #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
  276. ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  277. #define LL_ALLOCATED_SPACE(dev) \
  278. ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  279. struct header_ops {
  280. int (*create) (struct sk_buff *skb, struct net_device *dev,
  281. unsigned short type, const void *daddr,
  282. const void *saddr, unsigned len);
  283. int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
  284. int (*rebuild)(struct sk_buff *skb);
  285. #define HAVE_HEADER_CACHE
  286. int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
  287. void (*cache_update)(struct hh_cache *hh,
  288. const struct net_device *dev,
  289. const unsigned char *haddr);
  290. };
  291. /* These flag bits are private to the generic network queueing
  292. * layer, they may not be explicitly referenced by any other
  293. * code.
  294. */
  295. enum netdev_state_t {
  296. __LINK_STATE_START,
  297. __LINK_STATE_PRESENT,
  298. __LINK_STATE_NOCARRIER,
  299. __LINK_STATE_LINKWATCH_PENDING,
  300. __LINK_STATE_DORMANT,
  301. };
  302. /*
  303. * This structure holds at boot time configured netdevice settings. They
  304. * are then used in the device probing.
  305. */
  306. struct netdev_boot_setup {
  307. char name[IFNAMSIZ];
  308. struct ifmap map;
  309. };
  310. #define NETDEV_BOOT_SETUP_MAX 8
  311. extern int __init netdev_boot_setup(char *str);
  312. /*
  313. * Structure for NAPI scheduling similar to tasklet but with weighting
  314. */
  315. struct napi_struct {
  316. /* The poll_list must only be managed by the entity which
  317. * changes the state of the NAPI_STATE_SCHED bit. This means
  318. * whoever atomically sets that bit can add this napi_struct
  319. * to the per-cpu poll_list, and whoever clears that bit
  320. * can remove from the list right before clearing the bit.
  321. */
  322. struct list_head poll_list;
  323. unsigned long state;
  324. int weight;
  325. int (*poll)(struct napi_struct *, int);
  326. #ifdef CONFIG_NETPOLL
  327. spinlock_t poll_lock;
  328. int poll_owner;
  329. #endif
  330. unsigned int gro_count;
  331. struct net_device *dev;
  332. struct list_head dev_list;
  333. struct sk_buff *gro_list;
  334. struct sk_buff *skb;
  335. };
  336. enum {
  337. NAPI_STATE_SCHED, /* Poll is scheduled */
  338. NAPI_STATE_DISABLE, /* Disable pending */
  339. NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
  340. };
  341. enum gro_result {
  342. GRO_MERGED,
  343. GRO_MERGED_FREE,
  344. GRO_HELD,
  345. GRO_NORMAL,
  346. GRO_DROP,
  347. };
  348. typedef enum gro_result gro_result_t;
  349. extern void __napi_schedule(struct napi_struct *n);
  350. static inline int napi_disable_pending(struct napi_struct *n)
  351. {
  352. return test_bit(NAPI_STATE_DISABLE, &n->state);
  353. }
  354. /**
  355. * napi_schedule_prep - check if napi can be scheduled
  356. * @n: napi context
  357. *
  358. * Test if NAPI routine is already running, and if not mark
  359. * it as running. This is used as a condition variable
  360. * insure only one NAPI poll instance runs. We also make
  361. * sure there is no pending NAPI disable.
  362. */
  363. static inline int napi_schedule_prep(struct napi_struct *n)
  364. {
  365. return !napi_disable_pending(n) &&
  366. !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
  367. }
  368. /**
  369. * napi_schedule - schedule NAPI poll
  370. * @n: napi context
  371. *
  372. * Schedule NAPI poll routine to be called if it is not already
  373. * running.
  374. */
  375. static inline void napi_schedule(struct napi_struct *n)
  376. {
  377. if (napi_schedule_prep(n))
  378. __napi_schedule(n);
  379. }
  380. /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
  381. static inline int napi_reschedule(struct napi_struct *napi)
  382. {
  383. if (napi_schedule_prep(napi)) {
  384. __napi_schedule(napi);
  385. return 1;
  386. }
  387. return 0;
  388. }
  389. /**
  390. * napi_complete - NAPI processing complete
  391. * @n: napi context
  392. *
  393. * Mark NAPI processing as complete.
  394. */
  395. extern void __napi_complete(struct napi_struct *n);
  396. extern void napi_complete(struct napi_struct *n);
  397. /**
  398. * napi_disable - prevent NAPI from scheduling
  399. * @n: napi context
  400. *
  401. * Stop NAPI from being scheduled on this context.
  402. * Waits till any outstanding processing completes.
  403. */
  404. static inline void napi_disable(struct napi_struct *n)
  405. {
  406. set_bit(NAPI_STATE_DISABLE, &n->state);
  407. while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
  408. msleep(1);
  409. clear_bit(NAPI_STATE_DISABLE, &n->state);
  410. }
  411. /**
  412. * napi_enable - enable NAPI scheduling
  413. * @n: napi context
  414. *
  415. * Resume NAPI from being scheduled on this context.
  416. * Must be paired with napi_disable.
  417. */
  418. static inline void napi_enable(struct napi_struct *n)
  419. {
  420. BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
  421. smp_mb__before_clear_bit();
  422. clear_bit(NAPI_STATE_SCHED, &n->state);
  423. }
  424. #ifdef CONFIG_SMP
  425. /**
  426. * napi_synchronize - wait until NAPI is not running
  427. * @n: napi context
  428. *
  429. * Wait until NAPI is done being scheduled on this context.
  430. * Waits till any outstanding processing completes but
  431. * does not disable future activations.
  432. */
  433. static inline void napi_synchronize(const struct napi_struct *n)
  434. {
  435. while (test_bit(NAPI_STATE_SCHED, &n->state))
  436. msleep(1);
  437. }
  438. #else
  439. # define napi_synchronize(n) barrier()
  440. #endif
  441. enum netdev_queue_state_t {
  442. __QUEUE_STATE_XOFF,
  443. __QUEUE_STATE_FROZEN,
  444. };
  445. struct netdev_queue {
  446. /*
  447. * read mostly part
  448. */
  449. struct net_device *dev;
  450. struct Qdisc *qdisc;
  451. unsigned long state;
  452. struct Qdisc *qdisc_sleeping;
  453. /*
  454. * write mostly part
  455. */
  456. spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
  457. int xmit_lock_owner;
  458. /*
  459. * please use this field instead of dev->trans_start
  460. */
  461. unsigned long trans_start;
  462. unsigned long tx_bytes;
  463. unsigned long tx_packets;
  464. unsigned long tx_dropped;
  465. } ____cacheline_aligned_in_smp;
  466. /*
  467. * This structure defines the management hooks for network devices.
  468. * The following hooks can be defined; unless noted otherwise, they are
  469. * optional and can be filled with a null pointer.
  470. *
  471. * int (*ndo_init)(struct net_device *dev);
  472. * This function is called once when network device is registered.
  473. * The network device can use this to any late stage initializaton
  474. * or semantic validattion. It can fail with an error code which will
  475. * be propogated back to register_netdev
  476. *
  477. * void (*ndo_uninit)(struct net_device *dev);
  478. * This function is called when device is unregistered or when registration
  479. * fails. It is not called if init fails.
  480. *
  481. * int (*ndo_open)(struct net_device *dev);
  482. * This function is called when network device transistions to the up
  483. * state.
  484. *
  485. * int (*ndo_stop)(struct net_device *dev);
  486. * This function is called when network device transistions to the down
  487. * state.
  488. *
  489. * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
  490. * struct net_device *dev);
  491. * Called when a packet needs to be transmitted.
  492. * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
  493. * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
  494. * Required can not be NULL.
  495. *
  496. * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
  497. * Called to decide which queue to when device supports multiple
  498. * transmit queues.
  499. *
  500. * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
  501. * This function is called to allow device receiver to make
  502. * changes to configuration when multicast or promiscious is enabled.
  503. *
  504. * void (*ndo_set_rx_mode)(struct net_device *dev);
  505. * This function is called device changes address list filtering.
  506. *
  507. * void (*ndo_set_multicast_list)(struct net_device *dev);
  508. * This function is called when the multicast address list changes.
  509. *
  510. * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
  511. * This function is called when the Media Access Control address
  512. * needs to be changed. If this interface is not defined, the
  513. * mac address can not be changed.
  514. *
  515. * int (*ndo_validate_addr)(struct net_device *dev);
  516. * Test if Media Access Control address is valid for the device.
  517. *
  518. * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
  519. * Called when a user request an ioctl which can't be handled by
  520. * the generic interface code. If not defined ioctl's return
  521. * not supported error code.
  522. *
  523. * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
  524. * Used to set network devices bus interface parameters. This interface
  525. * is retained for legacy reason, new devices should use the bus
  526. * interface (PCI) for low level management.
  527. *
  528. * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
  529. * Called when a user wants to change the Maximum Transfer Unit
  530. * of a device. If not defined, any request to change MTU will
  531. * will return an error.
  532. *
  533. * void (*ndo_tx_timeout)(struct net_device *dev);
  534. * Callback uses when the transmitter has not made any progress
  535. * for dev->watchdog ticks.
  536. *
  537. * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
  538. * Called when a user wants to get the network device usage
  539. * statistics. If not defined, the counters in dev->stats will
  540. * be used.
  541. *
  542. * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
  543. * If device support VLAN receive accleration
  544. * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
  545. * when vlan groups for the device changes. Note: grp is NULL
  546. * if no vlan's groups are being used.
  547. *
  548. * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
  549. * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
  550. * this function is called when a VLAN id is registered.
  551. *
  552. * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
  553. * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
  554. * this function is called when a VLAN id is unregistered.
  555. *
  556. * void (*ndo_poll_controller)(struct net_device *dev);
  557. *
  558. * SR-IOV management functions.
  559. * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
  560. * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
  561. * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
  562. * int (*ndo_get_vf_config)(struct net_device *dev,
  563. * int vf, struct ifla_vf_info *ivf);
  564. */
  565. #define HAVE_NET_DEVICE_OPS
  566. struct net_device_ops {
  567. int (*ndo_init)(struct net_device *dev);
  568. void (*ndo_uninit)(struct net_device *dev);
  569. int (*ndo_open)(struct net_device *dev);
  570. int (*ndo_stop)(struct net_device *dev);
  571. netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
  572. struct net_device *dev);
  573. u16 (*ndo_select_queue)(struct net_device *dev,
  574. struct sk_buff *skb);
  575. void (*ndo_change_rx_flags)(struct net_device *dev,
  576. int flags);
  577. void (*ndo_set_rx_mode)(struct net_device *dev);
  578. void (*ndo_set_multicast_list)(struct net_device *dev);
  579. int (*ndo_set_mac_address)(struct net_device *dev,
  580. void *addr);
  581. int (*ndo_validate_addr)(struct net_device *dev);
  582. int (*ndo_do_ioctl)(struct net_device *dev,
  583. struct ifreq *ifr, int cmd);
  584. int (*ndo_set_config)(struct net_device *dev,
  585. struct ifmap *map);
  586. int (*ndo_change_mtu)(struct net_device *dev,
  587. int new_mtu);
  588. int (*ndo_neigh_setup)(struct net_device *dev,
  589. struct neigh_parms *);
  590. void (*ndo_tx_timeout) (struct net_device *dev);
  591. struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
  592. void (*ndo_vlan_rx_register)(struct net_device *dev,
  593. struct vlan_group *grp);
  594. void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
  595. unsigned short vid);
  596. void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
  597. unsigned short vid);
  598. #ifdef CONFIG_NET_POLL_CONTROLLER
  599. void (*ndo_poll_controller)(struct net_device *dev);
  600. #endif
  601. int (*ndo_set_vf_mac)(struct net_device *dev,
  602. int queue, u8 *mac);
  603. int (*ndo_set_vf_vlan)(struct net_device *dev,
  604. int queue, u16 vlan, u8 qos);
  605. int (*ndo_set_vf_tx_rate)(struct net_device *dev,
  606. int vf, int rate);
  607. int (*ndo_get_vf_config)(struct net_device *dev,
  608. int vf,
  609. struct ifla_vf_info *ivf);
  610. #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  611. int (*ndo_fcoe_enable)(struct net_device *dev);
  612. int (*ndo_fcoe_disable)(struct net_device *dev);
  613. int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
  614. u16 xid,
  615. struct scatterlist *sgl,
  616. unsigned int sgc);
  617. int (*ndo_fcoe_ddp_done)(struct net_device *dev,
  618. u16 xid);
  619. #define NETDEV_FCOE_WWNN 0
  620. #define NETDEV_FCOE_WWPN 1
  621. int (*ndo_fcoe_get_wwn)(struct net_device *dev,
  622. u64 *wwn, int type);
  623. #endif
  624. };
  625. /*
  626. * The DEVICE structure.
  627. * Actually, this whole structure is a big mistake. It mixes I/O
  628. * data with strictly "high-level" data, and it has to know about
  629. * almost every data structure used in the INET module.
  630. *
  631. * FIXME: cleanup struct net_device such that network protocol info
  632. * moves out.
  633. */
  634. struct net_device {
  635. /*
  636. * This is the first field of the "visible" part of this structure
  637. * (i.e. as seen by users in the "Space.c" file). It is the name
  638. * the interface.
  639. */
  640. char name[IFNAMSIZ];
  641. /* device name hash chain */
  642. struct hlist_node name_hlist;
  643. /* snmp alias */
  644. char *ifalias;
  645. /*
  646. * I/O specific fields
  647. * FIXME: Merge these and struct ifmap into one
  648. */
  649. unsigned long mem_end; /* shared mem end */
  650. unsigned long mem_start; /* shared mem start */
  651. unsigned long base_addr; /* device I/O address */
  652. unsigned int irq; /* device IRQ number */
  653. /*
  654. * Some hardware also needs these fields, but they are not
  655. * part of the usual set specified in Space.c.
  656. */
  657. unsigned char if_port; /* Selectable AUI, TP,..*/
  658. unsigned char dma; /* DMA channel */
  659. unsigned long state;
  660. struct list_head dev_list;
  661. struct list_head napi_list;
  662. struct list_head unreg_list;
  663. /* Net device features */
  664. unsigned long features;
  665. #define NETIF_F_SG 1 /* Scatter/gather IO. */
  666. #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
  667. #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
  668. #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
  669. #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
  670. #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
  671. #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
  672. #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
  673. #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
  674. #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
  675. #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
  676. #define NETIF_F_GSO 2048 /* Enable software GSO. */
  677. #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
  678. /* do not use LLTX in new drivers */
  679. #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
  680. #define NETIF_F_GRO 16384 /* Generic receive offload */
  681. #define NETIF_F_LRO 32768 /* large receive offload */
  682. /* the GSO_MASK reserves bits 16 through 23 */
  683. #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
  684. #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
  685. #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
  686. #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
  687. /* Segmentation offload features */
  688. #define NETIF_F_GSO_SHIFT 16
  689. #define NETIF_F_GSO_MASK 0x00ff0000
  690. #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
  691. #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
  692. #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
  693. #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
  694. #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
  695. #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
  696. /* List of features with software fallbacks. */
  697. #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
  698. #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
  699. #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
  700. #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
  701. #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
  702. /*
  703. * If one device supports one of these features, then enable them
  704. * for all in netdev_increment_features.
  705. */
  706. #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
  707. NETIF_F_SG | NETIF_F_HIGHDMA | \
  708. NETIF_F_FRAGLIST)
  709. /* Interface index. Unique device identifier */
  710. int ifindex;
  711. int iflink;
  712. struct net_device_stats stats;
  713. #ifdef CONFIG_WIRELESS_EXT
  714. /* List of functions to handle Wireless Extensions (instead of ioctl).
  715. * See <net/iw_handler.h> for details. Jean II */
  716. const struct iw_handler_def * wireless_handlers;
  717. /* Instance data managed by the core of Wireless Extensions. */
  718. struct iw_public_data * wireless_data;
  719. #endif
  720. /* Management operations */
  721. const struct net_device_ops *netdev_ops;
  722. const struct ethtool_ops *ethtool_ops;
  723. /* Hardware header description */
  724. const struct header_ops *header_ops;
  725. unsigned int flags; /* interface flags (a la BSD) */
  726. unsigned short gflags;
  727. unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
  728. unsigned short padded; /* How much padding added by alloc_netdev() */
  729. unsigned char operstate; /* RFC2863 operstate */
  730. unsigned char link_mode; /* mapping policy to operstate */
  731. unsigned mtu; /* interface MTU value */
  732. unsigned short type; /* interface hardware type */
  733. unsigned short hard_header_len; /* hardware hdr length */
  734. /* extra head- and tailroom the hardware may need, but not in all cases
  735. * can this be guaranteed, especially tailroom. Some cases also use
  736. * LL_MAX_HEADER instead to allocate the skb.
  737. */
  738. unsigned short needed_headroom;
  739. unsigned short needed_tailroom;
  740. struct net_device *master; /* Pointer to master device of a group,
  741. * which this device is member of.
  742. */
  743. /* Interface address info. */
  744. unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
  745. unsigned char addr_len; /* hardware address length */
  746. unsigned short dev_id; /* for shared network cards */
  747. struct netdev_hw_addr_list uc; /* Secondary unicast
  748. mac addresses */
  749. int uc_promisc;
  750. spinlock_t addr_list_lock;
  751. struct dev_addr_list *mc_list; /* Multicast mac addresses */
  752. int mc_count; /* Number of installed mcasts */
  753. unsigned int promiscuity;
  754. unsigned int allmulti;
  755. /* Protocol specific pointers */
  756. #ifdef CONFIG_NET_DSA
  757. void *dsa_ptr; /* dsa specific data */
  758. #endif
  759. void *atalk_ptr; /* AppleTalk link */
  760. void *ip_ptr; /* IPv4 specific data */
  761. void *dn_ptr; /* DECnet specific data */
  762. void *ip6_ptr; /* IPv6 specific data */
  763. void *ec_ptr; /* Econet specific data */
  764. void *ax25_ptr; /* AX.25 specific data */
  765. struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
  766. assign before registering */
  767. /*
  768. * Cache line mostly used on receive path (including eth_type_trans())
  769. */
  770. unsigned long last_rx; /* Time of last Rx */
  771. /* Interface address info used in eth_type_trans() */
  772. unsigned char *dev_addr; /* hw address, (before bcast
  773. because most packets are
  774. unicast) */
  775. struct netdev_hw_addr_list dev_addrs; /* list of device
  776. hw addresses */
  777. unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
  778. struct netdev_queue rx_queue;
  779. struct netdev_queue *_tx ____cacheline_aligned_in_smp;
  780. /* Number of TX queues allocated at alloc_netdev_mq() time */
  781. unsigned int num_tx_queues;
  782. /* Number of TX queues currently active in device */
  783. unsigned int real_num_tx_queues;
  784. /* root qdisc from userspace point of view */
  785. struct Qdisc *qdisc;
  786. unsigned long tx_queue_len; /* Max frames per queue allowed */
  787. spinlock_t tx_global_lock;
  788. /*
  789. * One part is mostly used on xmit path (device)
  790. */
  791. /* These may be needed for future network-power-down code. */
  792. /*
  793. * trans_start here is expensive for high speed devices on SMP,
  794. * please use netdev_queue->trans_start instead.
  795. */
  796. unsigned long trans_start; /* Time (in jiffies) of last Tx */
  797. int watchdog_timeo; /* used by dev_watchdog() */
  798. struct timer_list watchdog_timer;
  799. /* Number of references to this device */
  800. atomic_t refcnt ____cacheline_aligned_in_smp;
  801. /* delayed register/unregister */
  802. struct list_head todo_list;
  803. /* device index hash chain */
  804. struct hlist_node index_hlist;
  805. struct list_head link_watch_list;
  806. /* register/unregister state machine */
  807. enum { NETREG_UNINITIALIZED=0,
  808. NETREG_REGISTERED, /* completed register_netdevice */
  809. NETREG_UNREGISTERING, /* called unregister_netdevice */
  810. NETREG_UNREGISTERED, /* completed unregister todo */
  811. NETREG_RELEASED, /* called free_netdev */
  812. NETREG_DUMMY, /* dummy device for NAPI poll */
  813. } reg_state:16;
  814. enum {
  815. RTNL_LINK_INITIALIZED,
  816. RTNL_LINK_INITIALIZING,
  817. } rtnl_link_state:16;
  818. /* Called from unregister, can be used to call free_netdev */
  819. void (*destructor)(struct net_device *dev);
  820. #ifdef CONFIG_NETPOLL
  821. struct netpoll_info *npinfo;
  822. #endif
  823. #ifdef CONFIG_NET_NS
  824. /* Network namespace this network device is inside */
  825. struct net *nd_net;
  826. #endif
  827. /* mid-layer private */
  828. void *ml_priv;
  829. /* bridge stuff */
  830. struct net_bridge_port *br_port;
  831. /* macvlan */
  832. struct macvlan_port *macvlan_port;
  833. /* GARP */
  834. struct garp_port *garp_port;
  835. /* class/net/name entry */
  836. struct device dev;
  837. /* space for optional device, statistics, and wireless sysfs groups */
  838. const struct attribute_group *sysfs_groups[4];
  839. /* rtnetlink link ops */
  840. const struct rtnl_link_ops *rtnl_link_ops;
  841. /* VLAN feature mask */
  842. unsigned long vlan_features;
  843. /* for setting kernel sock attribute on TCP connection setup */
  844. #define GSO_MAX_SIZE 65536
  845. unsigned int gso_max_size;
  846. #ifdef CONFIG_DCB
  847. /* Data Center Bridging netlink ops */
  848. const struct dcbnl_rtnl_ops *dcbnl_ops;
  849. #endif
  850. #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  851. /* max exchange id for FCoE LRO by ddp */
  852. unsigned int fcoe_ddp_xid;
  853. #endif
  854. /* n-tuple filter list attached to this device */
  855. struct ethtool_rx_ntuple_list ethtool_ntuple_list;
  856. };
  857. #define to_net_dev(d) container_of(d, struct net_device, dev)
  858. #define NETDEV_ALIGN 32
  859. static inline
  860. struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
  861. unsigned int index)
  862. {
  863. return &dev->_tx[index];
  864. }
  865. static inline void netdev_for_each_tx_queue(struct net_device *dev,
  866. void (*f)(struct net_device *,
  867. struct netdev_queue *,
  868. void *),
  869. void *arg)
  870. {
  871. unsigned int i;
  872. for (i = 0; i < dev->num_tx_queues; i++)
  873. f(dev, &dev->_tx[i], arg);
  874. }
  875. /*
  876. * Net namespace inlines
  877. */
  878. static inline
  879. struct net *dev_net(const struct net_device *dev)
  880. {
  881. #ifdef CONFIG_NET_NS
  882. return dev->nd_net;
  883. #else
  884. return &init_net;
  885. #endif
  886. }
  887. static inline
  888. void dev_net_set(struct net_device *dev, struct net *net)
  889. {
  890. #ifdef CONFIG_NET_NS
  891. release_net(dev->nd_net);
  892. dev->nd_net = hold_net(net);
  893. #endif
  894. }
  895. static inline bool netdev_uses_dsa_tags(struct net_device *dev)
  896. {
  897. #ifdef CONFIG_NET_DSA_TAG_DSA
  898. if (dev->dsa_ptr != NULL)
  899. return dsa_uses_dsa_tags(dev->dsa_ptr);
  900. #endif
  901. return 0;
  902. }
  903. #ifndef CONFIG_NET_NS
  904. static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
  905. {
  906. skb->dev = dev;
  907. }
  908. #else /* CONFIG_NET_NS */
  909. void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
  910. #endif
  911. static inline bool netdev_uses_trailer_tags(struct net_device *dev)
  912. {
  913. #ifdef CONFIG_NET_DSA_TAG_TRAILER
  914. if (dev->dsa_ptr != NULL)
  915. return dsa_uses_trailer_tags(dev->dsa_ptr);
  916. #endif
  917. return 0;
  918. }
  919. /**
  920. * netdev_priv - access network device private data
  921. * @dev: network device
  922. *
  923. * Get network device private data
  924. */
  925. static inline void *netdev_priv(const struct net_device *dev)
  926. {
  927. return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
  928. }
  929. /* Set the sysfs physical device reference for the network logical device
  930. * if set prior to registration will cause a symlink during initialization.
  931. */
  932. #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
  933. /* Set the sysfs device type for the network logical device to allow
  934. * fin grained indentification of different network device types. For
  935. * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
  936. */
  937. #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
  938. /**
  939. * netif_napi_add - initialize a napi context
  940. * @dev: network device
  941. * @napi: napi context
  942. * @poll: polling function
  943. * @weight: default weight
  944. *
  945. * netif_napi_add() must be used to initialize a napi context prior to calling
  946. * *any* of the other napi related functions.
  947. */
  948. void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
  949. int (*poll)(struct napi_struct *, int), int weight);
  950. /**
  951. * netif_napi_del - remove a napi context
  952. * @napi: napi context
  953. *
  954. * netif_napi_del() removes a napi context from the network device napi list
  955. */
  956. void netif_napi_del(struct napi_struct *napi);
  957. struct napi_gro_cb {
  958. /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
  959. void *frag0;
  960. /* Length of frag0. */
  961. unsigned int frag0_len;
  962. /* This indicates where we are processing relative to skb->data. */
  963. int data_offset;
  964. /* This is non-zero if the packet may be of the same flow. */
  965. int same_flow;
  966. /* This is non-zero if the packet cannot be merged with the new skb. */
  967. int flush;
  968. /* Number of segments aggregated. */
  969. int count;
  970. /* Free the skb? */
  971. int free;
  972. };
  973. #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
  974. struct packet_type {
  975. __be16 type; /* This is really htons(ether_type). */
  976. struct net_device *dev; /* NULL is wildcarded here */
  977. int (*func) (struct sk_buff *,
  978. struct net_device *,
  979. struct packet_type *,
  980. struct net_device *);
  981. struct sk_buff *(*gso_segment)(struct sk_buff *skb,
  982. int features);
  983. int (*gso_send_check)(struct sk_buff *skb);
  984. struct sk_buff **(*gro_receive)(struct sk_buff **head,
  985. struct sk_buff *skb);
  986. int (*gro_complete)(struct sk_buff *skb);
  987. void *af_packet_priv;
  988. struct list_head list;
  989. };
  990. #include <linux/interrupt.h>
  991. #include <linux/notifier.h>
  992. extern rwlock_t dev_base_lock; /* Device list lock */
  993. #define for_each_netdev(net, d) \
  994. list_for_each_entry(d, &(net)->dev_base_head, dev_list)
  995. #define for_each_netdev_reverse(net, d) \
  996. list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
  997. #define for_each_netdev_rcu(net, d) \
  998. list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
  999. #define for_each_netdev_safe(net, d, n) \
  1000. list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
  1001. #define for_each_netdev_continue(net, d) \
  1002. list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
  1003. #define for_each_netdev_continue_rcu(net, d) \
  1004. list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
  1005. #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
  1006. static inline struct net_device *next_net_device(struct net_device *dev)
  1007. {
  1008. struct list_head *lh;
  1009. struct net *net;
  1010. net = dev_net(dev);
  1011. lh = dev->dev_list.next;
  1012. return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
  1013. }
  1014. static inline struct net_device *next_net_device_rcu(struct net_device *dev)
  1015. {
  1016. struct list_head *lh;
  1017. struct net *net;
  1018. net = dev_net(dev);
  1019. lh = rcu_dereference(dev->dev_list.next);
  1020. return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
  1021. }
  1022. static inline struct net_device *first_net_device(struct net *net)
  1023. {
  1024. return list_empty(&net->dev_base_head) ? NULL :
  1025. net_device_entry(net->dev_base_head.next);
  1026. }
  1027. extern int netdev_boot_setup_check(struct net_device *dev);
  1028. extern unsigned long netdev_boot_base(const char *prefix, int unit);
  1029. extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
  1030. extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
  1031. extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
  1032. extern void dev_add_pack(struct packet_type *pt);
  1033. extern void dev_remove_pack(struct packet_type *pt);
  1034. extern void __dev_remove_pack(struct packet_type *pt);
  1035. extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
  1036. unsigned short mask);
  1037. extern struct net_device *dev_get_by_name(struct net *net, const char *name);
  1038. extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
  1039. extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
  1040. extern int dev_alloc_name(struct net_device *dev, const char *name);
  1041. extern int dev_open(struct net_device *dev);
  1042. extern int dev_close(struct net_device *dev);
  1043. extern void dev_disable_lro(struct net_device *dev);
  1044. extern int dev_queue_xmit(struct sk_buff *skb);
  1045. extern int register_netdevice(struct net_device *dev);
  1046. extern void unregister_netdevice_queue(struct net_device *dev,
  1047. struct list_head *head);
  1048. extern void unregister_netdevice_many(struct list_head *head);
  1049. static inline void unregister_netdevice(struct net_device *dev)
  1050. {
  1051. unregister_netdevice_queue(dev, NULL);
  1052. }
  1053. extern void free_netdev(struct net_device *dev);
  1054. extern void synchronize_net(void);
  1055. extern int register_netdevice_notifier(struct notifier_block *nb);
  1056. extern int unregister_netdevice_notifier(struct notifier_block *nb);
  1057. extern int init_dummy_netdev(struct net_device *dev);
  1058. extern void netdev_resync_ops(struct net_device *dev);
  1059. extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
  1060. extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
  1061. extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
  1062. extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
  1063. extern int dev_restart(struct net_device *dev);
  1064. #ifdef CONFIG_NETPOLL_TRAP
  1065. extern int netpoll_trap(void);
  1066. #endif
  1067. extern int skb_gro_receive(struct sk_buff **head,
  1068. struct sk_buff *skb);
  1069. extern void skb_gro_reset_offset(struct sk_buff *skb);
  1070. static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
  1071. {
  1072. return NAPI_GRO_CB(skb)->data_offset;
  1073. }
  1074. static inline unsigned int skb_gro_len(const struct sk_buff *skb)
  1075. {
  1076. return skb->len - NAPI_GRO_CB(skb)->data_offset;
  1077. }
  1078. static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
  1079. {
  1080. NAPI_GRO_CB(skb)->data_offset += len;
  1081. }
  1082. static inline void *skb_gro_header_fast(struct sk_buff *skb,
  1083. unsigned int offset)
  1084. {
  1085. return NAPI_GRO_CB(skb)->frag0 + offset;
  1086. }
  1087. static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
  1088. {
  1089. return NAPI_GRO_CB(skb)->frag0_len < hlen;
  1090. }
  1091. static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
  1092. unsigned int offset)
  1093. {
  1094. NAPI_GRO_CB(skb)->frag0 = NULL;
  1095. NAPI_GRO_CB(skb)->frag0_len = 0;
  1096. return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
  1097. }
  1098. static inline void *skb_gro_mac_header(struct sk_buff *skb)
  1099. {
  1100. return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
  1101. }
  1102. static inline void *skb_gro_network_header(struct sk_buff *skb)
  1103. {
  1104. return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
  1105. skb_network_offset(skb);
  1106. }
  1107. static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  1108. unsigned short type,
  1109. const void *daddr, const void *saddr,
  1110. unsigned len)
  1111. {
  1112. if (!dev->header_ops || !dev->header_ops->create)
  1113. return 0;
  1114. return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
  1115. }
  1116. static inline int dev_parse_header(const struct sk_buff *skb,
  1117. unsigned char *haddr)
  1118. {
  1119. const struct net_device *dev = skb->dev;
  1120. if (!dev->header_ops || !dev->header_ops->parse)
  1121. return 0;
  1122. return dev->header_ops->parse(skb, haddr);
  1123. }
  1124. typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
  1125. extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
  1126. static inline int unregister_gifconf(unsigned int family)
  1127. {
  1128. return register_gifconf(family, NULL);
  1129. }
  1130. /*
  1131. * Incoming packets are placed on per-cpu queues so that
  1132. * no locking is needed.
  1133. */
  1134. struct softnet_data {
  1135. struct Qdisc *output_queue;
  1136. struct sk_buff_head input_pkt_queue;
  1137. struct list_head poll_list;
  1138. struct sk_buff *completion_queue;
  1139. struct napi_struct backlog;
  1140. };
  1141. DECLARE_PER_CPU(struct softnet_data,softnet_data);
  1142. #define HAVE_NETIF_QUEUE
  1143. extern void __netif_schedule(struct Qdisc *q);
  1144. static inline void netif_schedule_queue(struct netdev_queue *txq)
  1145. {
  1146. if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
  1147. __netif_schedule(txq->qdisc);
  1148. }
  1149. static inline void netif_tx_schedule_all(struct net_device *dev)
  1150. {
  1151. unsigned int i;
  1152. for (i = 0; i < dev->num_tx_queues; i++)
  1153. netif_schedule_queue(netdev_get_tx_queue(dev, i));
  1154. }
  1155. static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
  1156. {
  1157. clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
  1158. }
  1159. /**
  1160. * netif_start_queue - allow transmit
  1161. * @dev: network device
  1162. *
  1163. * Allow upper layers to call the device hard_start_xmit routine.
  1164. */
  1165. static inline void netif_start_queue(struct net_device *dev)
  1166. {
  1167. netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
  1168. }
  1169. static inline void netif_tx_start_all_queues(struct net_device *dev)
  1170. {
  1171. unsigned int i;
  1172. for (i = 0; i < dev->num_tx_queues; i++) {
  1173. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1174. netif_tx_start_queue(txq);
  1175. }
  1176. }
  1177. static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
  1178. {
  1179. #ifdef CONFIG_NETPOLL_TRAP
  1180. if (netpoll_trap()) {
  1181. netif_tx_start_queue(dev_queue);
  1182. return;
  1183. }
  1184. #endif
  1185. if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
  1186. __netif_schedule(dev_queue->qdisc);
  1187. }
  1188. /**
  1189. * netif_wake_queue - restart transmit
  1190. * @dev: network device
  1191. *
  1192. * Allow upper layers to call the device hard_start_xmit routine.
  1193. * Used for flow control when transmit resources are available.
  1194. */
  1195. static inline void netif_wake_queue(struct net_device *dev)
  1196. {
  1197. netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
  1198. }
  1199. static inline void netif_tx_wake_all_queues(struct net_device *dev)
  1200. {
  1201. unsigned int i;
  1202. for (i = 0; i < dev->num_tx_queues; i++) {
  1203. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1204. netif_tx_wake_queue(txq);
  1205. }
  1206. }
  1207. static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
  1208. {
  1209. set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
  1210. }
  1211. /**
  1212. * netif_stop_queue - stop transmitted packets
  1213. * @dev: network device
  1214. *
  1215. * Stop upper layers calling the device hard_start_xmit routine.
  1216. * Used for flow control when transmit resources are unavailable.
  1217. */
  1218. static inline void netif_stop_queue(struct net_device *dev)
  1219. {
  1220. netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
  1221. }
  1222. static inline void netif_tx_stop_all_queues(struct net_device *dev)
  1223. {
  1224. unsigned int i;
  1225. for (i = 0; i < dev->num_tx_queues; i++) {
  1226. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1227. netif_tx_stop_queue(txq);
  1228. }
  1229. }
  1230. static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
  1231. {
  1232. return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
  1233. }
  1234. /**
  1235. * netif_queue_stopped - test if transmit queue is flowblocked
  1236. * @dev: network device
  1237. *
  1238. * Test if transmit queue on device is currently unable to send.
  1239. */
  1240. static inline int netif_queue_stopped(const struct net_device *dev)
  1241. {
  1242. return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
  1243. }
  1244. static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
  1245. {
  1246. return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
  1247. }
  1248. /**
  1249. * netif_running - test if up
  1250. * @dev: network device
  1251. *
  1252. * Test if the device has been brought up.
  1253. */
  1254. static inline int netif_running(const struct net_device *dev)
  1255. {
  1256. return test_bit(__LINK_STATE_START, &dev->state);
  1257. }
  1258. /*
  1259. * Routines to manage the subqueues on a device. We only need start
  1260. * stop, and a check if it's stopped. All other device management is
  1261. * done at the overall netdevice level.
  1262. * Also test the device if we're multiqueue.
  1263. */
  1264. /**
  1265. * netif_start_subqueue - allow sending packets on subqueue
  1266. * @dev: network device
  1267. * @queue_index: sub queue index
  1268. *
  1269. * Start individual transmit queue of a device with multiple transmit queues.
  1270. */
  1271. static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
  1272. {
  1273. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1274. netif_tx_start_queue(txq);
  1275. }
  1276. /**
  1277. * netif_stop_subqueue - stop sending packets on subqueue
  1278. * @dev: network device
  1279. * @queue_index: sub queue index
  1280. *
  1281. * Stop individual transmit queue of a device with multiple transmit queues.
  1282. */
  1283. static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
  1284. {
  1285. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1286. #ifdef CONFIG_NETPOLL_TRAP
  1287. if (netpoll_trap())
  1288. return;
  1289. #endif
  1290. netif_tx_stop_queue(txq);
  1291. }
  1292. /**
  1293. * netif_subqueue_stopped - test status of subqueue
  1294. * @dev: network device
  1295. * @queue_index: sub queue index
  1296. *
  1297. * Check individual transmit queue of a device with multiple transmit queues.
  1298. */
  1299. static inline int __netif_subqueue_stopped(const struct net_device *dev,
  1300. u16 queue_index)
  1301. {
  1302. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1303. return netif_tx_queue_stopped(txq);
  1304. }
  1305. static inline int netif_subqueue_stopped(const struct net_device *dev,
  1306. struct sk_buff *skb)
  1307. {
  1308. return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
  1309. }
  1310. /**
  1311. * netif_wake_subqueue - allow sending packets on subqueue
  1312. * @dev: network device
  1313. * @queue_index: sub queue index
  1314. *
  1315. * Resume individual transmit queue of a device with multiple transmit queues.
  1316. */
  1317. static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
  1318. {
  1319. struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
  1320. #ifdef CONFIG_NETPOLL_TRAP
  1321. if (netpoll_trap())
  1322. return;
  1323. #endif
  1324. if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
  1325. __netif_schedule(txq->qdisc);
  1326. }
  1327. /**
  1328. * netif_is_multiqueue - test if device has multiple transmit queues
  1329. * @dev: network device
  1330. *
  1331. * Check if device has multiple transmit queues
  1332. */
  1333. static inline int netif_is_multiqueue(const struct net_device *dev)
  1334. {
  1335. return (dev->num_tx_queues > 1);
  1336. }
  1337. /* Use this variant when it is known for sure that it
  1338. * is executing from hardware interrupt context or with hardware interrupts
  1339. * disabled.
  1340. */
  1341. extern void dev_kfree_skb_irq(struct sk_buff *skb);
  1342. /* Use this variant in places where it could be invoked
  1343. * from either hardware interrupt or other context, with hardware interrupts
  1344. * either disabled or enabled.
  1345. */
  1346. extern void dev_kfree_skb_any(struct sk_buff *skb);
  1347. #define HAVE_NETIF_RX 1
  1348. extern int netif_rx(struct sk_buff *skb);
  1349. extern int netif_rx_ni(struct sk_buff *skb);
  1350. #define HAVE_NETIF_RECEIVE_SKB 1
  1351. extern int netif_receive_skb(struct sk_buff *skb);
  1352. extern gro_result_t dev_gro_receive(struct napi_struct *napi,
  1353. struct sk_buff *skb);
  1354. extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
  1355. extern gro_result_t napi_gro_receive(struct napi_struct *napi,
  1356. struct sk_buff *skb);
  1357. extern void napi_reuse_skb(struct napi_struct *napi,
  1358. struct sk_buff *skb);
  1359. extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
  1360. extern gro_result_t napi_frags_finish(struct napi_struct *napi,
  1361. struct sk_buff *skb,
  1362. gro_result_t ret);
  1363. extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
  1364. extern gro_result_t napi_gro_frags(struct napi_struct *napi);
  1365. static inline void napi_free_frags(struct napi_struct *napi)
  1366. {
  1367. kfree_skb(napi->skb);
  1368. napi->skb = NULL;
  1369. }
  1370. extern void netif_nit_deliver(struct sk_buff *skb);
  1371. extern int dev_valid_name(const char *name);
  1372. extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
  1373. extern int dev_ethtool(struct net *net, struct ifreq *);
  1374. extern unsigned dev_get_flags(const struct net_device *);
  1375. extern int dev_change_flags(struct net_device *, unsigned);
  1376. extern int dev_change_name(struct net_device *, const char *);
  1377. extern int dev_set_alias(struct net_device *, const char *, size_t);
  1378. extern int dev_change_net_namespace(struct net_device *,
  1379. struct net *, const char *);
  1380. extern int dev_set_mtu(struct net_device *, int);
  1381. extern int dev_set_mac_address(struct net_device *,
  1382. struct sockaddr *);
  1383. extern int dev_hard_start_xmit(struct sk_buff *skb,
  1384. struct net_device *dev,
  1385. struct netdev_queue *txq);
  1386. extern int dev_forward_skb(struct net_device *dev,
  1387. struct sk_buff *skb);
  1388. extern int netdev_budget;
  1389. /* Called by rtnetlink.c:rtnl_unlock() */
  1390. extern void netdev_run_todo(void);
  1391. /**
  1392. * dev_put - release reference to device
  1393. * @dev: network device
  1394. *
  1395. * Release reference to device to allow it to be freed.
  1396. */
  1397. static inline void dev_put(struct net_device *dev)
  1398. {
  1399. atomic_dec(&dev->refcnt);
  1400. }
  1401. /**
  1402. * dev_hold - get reference to device
  1403. * @dev: network device
  1404. *
  1405. * Hold reference to device to keep it from being freed.
  1406. */
  1407. static inline void dev_hold(struct net_device *dev)
  1408. {
  1409. atomic_inc(&dev->refcnt);
  1410. }
  1411. /* Carrier loss detection, dial on demand. The functions netif_carrier_on
  1412. * and _off may be called from IRQ context, but it is caller
  1413. * who is responsible for serialization of these calls.
  1414. *
  1415. * The name carrier is inappropriate, these functions should really be
  1416. * called netif_lowerlayer_*() because they represent the state of any
  1417. * kind of lower layer not just hardware media.
  1418. */
  1419. extern void linkwatch_fire_event(struct net_device *dev);
  1420. extern void linkwatch_forget_dev(struct net_device *dev);
  1421. /**
  1422. * netif_carrier_ok - test if carrier present
  1423. * @dev: network device
  1424. *
  1425. * Check if carrier is present on device
  1426. */
  1427. static inline int netif_carrier_ok(const struct net_device *dev)
  1428. {
  1429. return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
  1430. }
  1431. extern unsigned long dev_trans_start(struct net_device *dev);
  1432. extern void __netdev_watchdog_up(struct net_device *dev);
  1433. extern void netif_carrier_on(struct net_device *dev);
  1434. extern void netif_carrier_off(struct net_device *dev);
  1435. /**
  1436. * netif_dormant_on - mark device as dormant.
  1437. * @dev: network device
  1438. *
  1439. * Mark device as dormant (as per RFC2863).
  1440. *
  1441. * The dormant state indicates that the relevant interface is not
  1442. * actually in a condition to pass packets (i.e., it is not 'up') but is
  1443. * in a "pending" state, waiting for some external event. For "on-
  1444. * demand" interfaces, this new state identifies the situation where the
  1445. * interface is waiting for events to place it in the up state.
  1446. *
  1447. */
  1448. static inline void netif_dormant_on(struct net_device *dev)
  1449. {
  1450. if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
  1451. linkwatch_fire_event(dev);
  1452. }
  1453. /**
  1454. * netif_dormant_off - set device as not dormant.
  1455. * @dev: network device
  1456. *
  1457. * Device is not in dormant state.
  1458. */
  1459. static inline void netif_dormant_off(struct net_device *dev)
  1460. {
  1461. if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
  1462. linkwatch_fire_event(dev);
  1463. }
  1464. /**
  1465. * netif_dormant - test if carrier present
  1466. * @dev: network device
  1467. *
  1468. * Check if carrier is present on device
  1469. */
  1470. static inline int netif_dormant(const struct net_device *dev)
  1471. {
  1472. return test_bit(__LINK_STATE_DORMANT, &dev->state);
  1473. }
  1474. /**
  1475. * netif_oper_up - test if device is operational
  1476. * @dev: network device
  1477. *
  1478. * Check if carrier is operational
  1479. */
  1480. static inline int netif_oper_up(const struct net_device *dev)
  1481. {
  1482. return (dev->operstate == IF_OPER_UP ||
  1483. dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
  1484. }
  1485. /**
  1486. * netif_device_present - is device available or removed
  1487. * @dev: network device
  1488. *
  1489. * Check if device has not been removed from system.
  1490. */
  1491. static inline int netif_device_present(struct net_device *dev)
  1492. {
  1493. return test_bit(__LINK_STATE_PRESENT, &dev->state);
  1494. }
  1495. extern void netif_device_detach(struct net_device *dev);
  1496. extern void netif_device_attach(struct net_device *dev);
  1497. /*
  1498. * Network interface message level settings
  1499. */
  1500. #define HAVE_NETIF_MSG 1
  1501. enum {
  1502. NETIF_MSG_DRV = 0x0001,
  1503. NETIF_MSG_PROBE = 0x0002,
  1504. NETIF_MSG_LINK = 0x0004,
  1505. NETIF_MSG_TIMER = 0x0008,
  1506. NETIF_MSG_IFDOWN = 0x0010,
  1507. NETIF_MSG_IFUP = 0x0020,
  1508. NETIF_MSG_RX_ERR = 0x0040,
  1509. NETIF_MSG_TX_ERR = 0x0080,
  1510. NETIF_MSG_TX_QUEUED = 0x0100,
  1511. NETIF_MSG_INTR = 0x0200,
  1512. NETIF_MSG_TX_DONE = 0x0400,
  1513. NETIF_MSG_RX_STATUS = 0x0800,
  1514. NETIF_MSG_PKTDATA = 0x1000,
  1515. NETIF_MSG_HW = 0x2000,
  1516. NETIF_MSG_WOL = 0x4000,
  1517. };
  1518. #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
  1519. #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
  1520. #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
  1521. #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
  1522. #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
  1523. #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
  1524. #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
  1525. #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
  1526. #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
  1527. #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
  1528. #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
  1529. #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
  1530. #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
  1531. #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
  1532. #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
  1533. static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
  1534. {
  1535. /* use default */
  1536. if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
  1537. return default_msg_enable_bits;
  1538. if (debug_value == 0) /* no output */
  1539. return 0;
  1540. /* set low N bits */
  1541. return (1 << debug_value) - 1;
  1542. }
  1543. static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
  1544. {
  1545. spin_lock(&txq->_xmit_lock);
  1546. txq->xmit_lock_owner = cpu;
  1547. }
  1548. static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
  1549. {
  1550. spin_lock_bh(&txq->_xmit_lock);
  1551. txq->xmit_lock_owner = smp_processor_id();
  1552. }
  1553. static inline int __netif_tx_trylock(struct netdev_queue *txq)
  1554. {
  1555. int ok = spin_trylock(&txq->_xmit_lock);
  1556. if (likely(ok))
  1557. txq->xmit_lock_owner = smp_processor_id();
  1558. return ok;
  1559. }
  1560. static inline void __netif_tx_unlock(struct netdev_queue *txq)
  1561. {
  1562. txq->xmit_lock_owner = -1;
  1563. spin_unlock(&txq->_xmit_lock);
  1564. }
  1565. static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
  1566. {
  1567. txq->xmit_lock_owner = -1;
  1568. spin_unlock_bh(&txq->_xmit_lock);
  1569. }
  1570. static inline void txq_trans_update(struct netdev_queue *txq)
  1571. {
  1572. if (txq->xmit_lock_owner != -1)
  1573. txq->trans_start = jiffies;
  1574. }
  1575. /**
  1576. * netif_tx_lock - grab network device transmit lock
  1577. * @dev: network device
  1578. *
  1579. * Get network device transmit lock
  1580. */
  1581. static inline void netif_tx_lock(struct net_device *dev)
  1582. {
  1583. unsigned int i;
  1584. int cpu;
  1585. spin_lock(&dev->tx_global_lock);
  1586. cpu = smp_processor_id();
  1587. for (i = 0; i < dev->num_tx_queues; i++) {
  1588. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1589. /* We are the only thread of execution doing a
  1590. * freeze, but we have to grab the _xmit_lock in
  1591. * order to synchronize with threads which are in
  1592. * the ->hard_start_xmit() handler and already
  1593. * checked the frozen bit.
  1594. */
  1595. __netif_tx_lock(txq, cpu);
  1596. set_bit(__QUEUE_STATE_FROZEN, &txq->state);
  1597. __netif_tx_unlock(txq);
  1598. }
  1599. }
  1600. static inline void netif_tx_lock_bh(struct net_device *dev)
  1601. {
  1602. local_bh_disable();
  1603. netif_tx_lock(dev);
  1604. }
  1605. static inline void netif_tx_unlock(struct net_device *dev)
  1606. {
  1607. unsigned int i;
  1608. for (i = 0; i < dev->num_tx_queues; i++) {
  1609. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1610. /* No need to grab the _xmit_lock here. If the
  1611. * queue is not stopped for another reason, we
  1612. * force a schedule.
  1613. */
  1614. clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
  1615. netif_schedule_queue(txq);
  1616. }
  1617. spin_unlock(&dev->tx_global_lock);
  1618. }
  1619. static inline void netif_tx_unlock_bh(struct net_device *dev)
  1620. {
  1621. netif_tx_unlock(dev);
  1622. local_bh_enable();
  1623. }
  1624. #define HARD_TX_LOCK(dev, txq, cpu) { \
  1625. if ((dev->features & NETIF_F_LLTX) == 0) { \
  1626. __netif_tx_lock(txq, cpu); \
  1627. } \
  1628. }
  1629. #define HARD_TX_UNLOCK(dev, txq) { \
  1630. if ((dev->features & NETIF_F_LLTX) == 0) { \
  1631. __netif_tx_unlock(txq); \
  1632. } \
  1633. }
  1634. static inline void netif_tx_disable(struct net_device *dev)
  1635. {
  1636. unsigned int i;
  1637. int cpu;
  1638. local_bh_disable();
  1639. cpu = smp_processor_id();
  1640. for (i = 0; i < dev->num_tx_queues; i++) {
  1641. struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
  1642. __netif_tx_lock(txq, cpu);
  1643. netif_tx_stop_queue(txq);
  1644. __netif_tx_unlock(txq);
  1645. }
  1646. local_bh_enable();
  1647. }
  1648. static inline void netif_addr_lock(struct net_device *dev)
  1649. {
  1650. spin_lock(&dev->addr_list_lock);
  1651. }
  1652. static inline void netif_addr_lock_bh(struct net_device *dev)
  1653. {
  1654. spin_lock_bh(&dev->addr_list_lock);
  1655. }
  1656. static inline void netif_addr_unlock(struct net_device *dev)
  1657. {
  1658. spin_unlock(&dev->addr_list_lock);
  1659. }
  1660. static inline void netif_addr_unlock_bh(struct net_device *dev)
  1661. {
  1662. spin_unlock_bh(&dev->addr_list_lock);
  1663. }
  1664. /*
  1665. * dev_addrs walker. Should be used only for read access. Call with
  1666. * rcu_read_lock held.
  1667. */
  1668. #define for_each_dev_addr(dev, ha) \
  1669. list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
  1670. /* These functions live elsewhere (drivers/net/net_init.c, but related) */
  1671. extern void ether_setup(struct net_device *dev);
  1672. /* Support for loadable net-drivers */
  1673. extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
  1674. void (*setup)(struct net_device *),
  1675. unsigned int queue_count);
  1676. #define alloc_netdev(sizeof_priv, name, setup) \
  1677. alloc_netdev_mq(sizeof_priv, name, setup, 1)
  1678. extern int register_netdev(struct net_device *dev);
  1679. extern void unregister_netdev(struct net_device *dev);
  1680. /* Functions used for device addresses handling */
  1681. extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
  1682. unsigned char addr_type);
  1683. extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
  1684. unsigned char addr_type);
  1685. extern int dev_addr_add_multiple(struct net_device *to_dev,
  1686. struct net_device *from_dev,
  1687. unsigned char addr_type);
  1688. extern int dev_addr_del_multiple(struct net_device *to_dev,
  1689. struct net_device *from_dev,
  1690. unsigned char addr_type);
  1691. /* Functions used for secondary unicast and multicast support */
  1692. extern void dev_set_rx_mode(struct net_device *dev);
  1693. extern void __dev_set_rx_mode(struct net_device *dev);
  1694. extern int dev_unicast_delete(struct net_device *dev, void *addr);
  1695. extern int dev_unicast_add(struct net_device *dev, void *addr);
  1696. extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
  1697. extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
  1698. extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
  1699. extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
  1700. extern int dev_mc_sync(struct net_device *to, struct net_device *from);
  1701. extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
  1702. extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
  1703. extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
  1704. extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
  1705. extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
  1706. extern int dev_set_promiscuity(struct net_device *dev, int inc);
  1707. extern int dev_set_allmulti(struct net_device *dev, int inc);
  1708. extern void netdev_state_change(struct net_device *dev);
  1709. extern void netdev_bonding_change(struct net_device *dev,
  1710. unsigned long event);
  1711. extern void netdev_features_change(struct net_device *dev);
  1712. /* Load a device via the kmod */
  1713. extern void dev_load(struct net *net, const char *name);
  1714. extern void dev_mcast_init(void);
  1715. extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
  1716. extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
  1717. extern int netdev_max_backlog;
  1718. extern int weight_p;
  1719. extern int netdev_set_master(struct net_device *dev, struct net_device *master);
  1720. extern int skb_checksum_help(struct sk_buff *skb);
  1721. extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
  1722. #ifdef CONFIG_BUG
  1723. extern void netdev_rx_csum_fault(struct net_device *dev);
  1724. #else
  1725. static inline void netdev_rx_csum_fault(struct net_device *dev)
  1726. {
  1727. }
  1728. #endif
  1729. /* rx skb timestamps */
  1730. extern void net_enable_timestamp(void);
  1731. extern void net_disable_timestamp(void);
  1732. #ifdef CONFIG_PROC_FS
  1733. extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
  1734. extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  1735. extern void dev_seq_stop(struct seq_file *seq, void *v);
  1736. #endif
  1737. extern int netdev_class_create_file(struct class_attribute *class_attr);
  1738. extern void netdev_class_remove_file(struct class_attribute *class_attr);
  1739. extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
  1740. extern void linkwatch_run_queue(void);
  1741. unsigned long netdev_increment_features(unsigned long all, unsigned long one,
  1742. unsigned long mask);
  1743. unsigned long netdev_fix_features(unsigned long features, const char *name);
  1744. void netif_stacked_transfer_operstate(const struct net_device *rootdev,
  1745. struct net_device *dev);
  1746. static inline int net_gso_ok(int features, int gso_type)
  1747. {
  1748. int feature = gso_type << NETIF_F_GSO_SHIFT;
  1749. return (features & feature) == feature;
  1750. }
  1751. static inline int skb_gso_ok(struct sk_buff *skb, int features)
  1752. {
  1753. return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
  1754. (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
  1755. }
  1756. static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
  1757. {
  1758. return skb_is_gso(skb) &&
  1759. (!skb_gso_ok(skb, dev->features) ||
  1760. unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
  1761. }
  1762. static inline void netif_set_gso_max_size(struct net_device *dev,
  1763. unsigned int size)
  1764. {
  1765. dev->gso_max_size = size;
  1766. }
  1767. static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
  1768. struct net_device *master)
  1769. {
  1770. if (skb->pkt_type == PACKET_HOST) {
  1771. u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
  1772. memcpy(dest, master->dev_addr, ETH_ALEN);
  1773. }
  1774. }
  1775. /* On bonding slaves other than the currently active slave, suppress
  1776. * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
  1777. * ARP on active-backup slaves with arp_validate enabled.
  1778. */
  1779. static inline int skb_bond_should_drop(struct sk_buff *skb)
  1780. {
  1781. struct net_device *dev = skb->dev;
  1782. struct net_device *master = dev->master;
  1783. if (master) {
  1784. if (master->priv_flags & IFF_MASTER_ARPMON)
  1785. dev->last_rx = jiffies;
  1786. if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
  1787. /* Do address unmangle. The local destination address
  1788. * will be always the one master has. Provides the right
  1789. * functionality in a bridge.
  1790. */
  1791. skb_bond_set_mac_by_master(skb, master);
  1792. }
  1793. if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
  1794. if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
  1795. skb->protocol == __cpu_to_be16(ETH_P_ARP))
  1796. return 0;
  1797. if (master->priv_flags & IFF_MASTER_ALB) {
  1798. if (skb->pkt_type != PACKET_BROADCAST &&
  1799. skb->pkt_type != PACKET_MULTICAST)
  1800. return 0;
  1801. }
  1802. if (master->priv_flags & IFF_MASTER_8023AD &&
  1803. skb->protocol == __cpu_to_be16(ETH_P_SLOW))
  1804. return 0;
  1805. return 1;
  1806. }
  1807. }
  1808. return 0;
  1809. }
  1810. extern struct pernet_operations __net_initdata loopback_net_ops;
  1811. static inline int dev_ethtool_get_settings(struct net_device *dev,
  1812. struct ethtool_cmd *cmd)
  1813. {
  1814. if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
  1815. return -EOPNOTSUPP;
  1816. return dev->ethtool_ops->get_settings(dev, cmd);
  1817. }
  1818. static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
  1819. {
  1820. if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
  1821. return 0;
  1822. return dev->ethtool_ops->get_rx_csum(dev);
  1823. }
  1824. static inline u32 dev_ethtool_get_flags(struct net_device *dev)
  1825. {
  1826. if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
  1827. return 0;
  1828. return dev->ethtool_ops->get_flags(dev);
  1829. }
  1830. /* Logging, debugging and troubleshooting/diagnostic helpers. */
  1831. /* netdev_printk helpers, similar to dev_printk */
  1832. static inline const char *netdev_name(const struct net_device *dev)
  1833. {
  1834. if (dev->reg_state != NETREG_REGISTERED)
  1835. return "(unregistered net_device)";
  1836. return dev->name;
  1837. }
  1838. #define netdev_printk(level, netdev, format, args...) \
  1839. dev_printk(level, (netdev)->dev.parent, \
  1840. "%s: " format, \
  1841. netdev_name(netdev), ##args)
  1842. #define netdev_emerg(dev, format, args...) \
  1843. netdev_printk(KERN_EMERG, dev, format, ##args)
  1844. #define netdev_alert(dev, format, args...) \
  1845. netdev_printk(KERN_ALERT, dev, format, ##args)
  1846. #define netdev_crit(dev, format, args...) \
  1847. netdev_printk(KERN_CRIT, dev, format, ##args)
  1848. #define netdev_err(dev, format, args...) \
  1849. netdev_printk(KERN_ERR, dev, format, ##args)
  1850. #define netdev_warn(dev, format, args...) \
  1851. netdev_printk(KERN_WARNING, dev, format, ##args)
  1852. #define netdev_notice(dev, format, args...) \
  1853. netdev_printk(KERN_NOTICE, dev, format, ##args)
  1854. #define netdev_info(dev, format, args...) \
  1855. netdev_printk(KERN_INFO, dev, format, ##args)
  1856. #if defined(DEBUG)
  1857. #define netdev_dbg(__dev, format, args...) \
  1858. netdev_printk(KERN_DEBUG, __dev, format, ##args)
  1859. #elif defined(CONFIG_DYNAMIC_DEBUG)
  1860. #define netdev_dbg(__dev, format, args...) \
  1861. do { \
  1862. dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
  1863. netdev_name(__dev), ##args); \
  1864. } while (0)
  1865. #else
  1866. #define netdev_dbg(__dev, format, args...) \
  1867. ({ \
  1868. if (0) \
  1869. netdev_printk(KERN_DEBUG, __dev, format, ##args); \
  1870. 0; \
  1871. })
  1872. #endif
  1873. #if defined(VERBOSE_DEBUG)
  1874. #define netdev_vdbg netdev_dbg
  1875. #else
  1876. #define netdev_vdbg(dev, format, args...) \
  1877. ({ \
  1878. if (0) \
  1879. netdev_printk(KERN_DEBUG, dev, format, ##args); \
  1880. 0; \
  1881. })
  1882. #endif
  1883. /*
  1884. * netdev_WARN() acts like dev_printk(), but with the key difference
  1885. * of using a WARN/WARN_ON to get the message out, including the
  1886. * file/line information and a backtrace.
  1887. */
  1888. #define netdev_WARN(dev, format, args...) \
  1889. WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
  1890. /* netif printk helpers, similar to netdev_printk */
  1891. #define netif_printk(priv, type, level, dev, fmt, args...) \
  1892. do { \
  1893. if (netif_msg_##type(priv)) \
  1894. netdev_printk(level, (dev), fmt, ##args); \
  1895. } while (0)
  1896. #define netif_emerg(priv, type, dev, fmt, args...) \
  1897. netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
  1898. #define netif_alert(priv, type, dev, fmt, args...) \
  1899. netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
  1900. #define netif_crit(priv, type, dev, fmt, args...) \
  1901. netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
  1902. #define netif_err(priv, type, dev, fmt, args...) \
  1903. netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
  1904. #define netif_warn(priv, type, dev, fmt, args...) \
  1905. netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
  1906. #define netif_notice(priv, type, dev, fmt, args...) \
  1907. netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
  1908. #define netif_info(priv, type, dev, fmt, args...) \
  1909. netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)
  1910. #if defined(DEBUG)
  1911. #define netif_dbg(priv, type, dev, format, args...) \
  1912. netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
  1913. #elif defined(CONFIG_DYNAMIC_DEBUG)
  1914. #define netif_dbg(priv, type, netdev, format, args...) \
  1915. do { \
  1916. if (netif_msg_##type(priv)) \
  1917. dynamic_dev_dbg((netdev)->dev.parent, \
  1918. "%s: " format, \
  1919. netdev_name(netdev), ##args); \
  1920. } while (0)
  1921. #else
  1922. #define netif_dbg(priv, type, dev, format, args...) \
  1923. ({ \
  1924. if (0) \
  1925. netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
  1926. 0; \
  1927. })
  1928. #endif
  1929. #if defined(VERBOSE_DEBUG)
  1930. #define netif_vdbg netdev_dbg
  1931. #else
  1932. #define netif_vdbg(priv, type, dev, format, args...) \
  1933. ({ \
  1934. if (0) \
  1935. netif_printk(KERN_DEBUG, dev, format, ##args); \
  1936. 0; \
  1937. })
  1938. #endif
  1939. #endif /* __KERNEL__ */
  1940. #endif /* _LINUX_NETDEVICE_H */