netdevice.h 30 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.Cox@linux.org>
  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. #ifdef __KERNEL__
  31. #include <asm/atomic.h>
  32. #include <asm/cache.h>
  33. #include <asm/byteorder.h>
  34. #include <linux/device.h>
  35. #include <linux/percpu.h>
  36. #include <linux/dmaengine.h>
  37. struct divert_blk;
  38. struct vlan_group;
  39. struct ethtool_ops;
  40. struct netpoll_info;
  41. /* source back-compat hooks */
  42. #define SET_ETHTOOL_OPS(netdev,ops) \
  43. ( (netdev)->ethtool_ops = (ops) )
  44. #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
  45. functions are available. */
  46. #define HAVE_FREE_NETDEV /* free_netdev() */
  47. #define HAVE_NETDEV_PRIV /* netdev_priv() */
  48. #define NET_XMIT_SUCCESS 0
  49. #define NET_XMIT_DROP 1 /* skb dropped */
  50. #define NET_XMIT_CN 2 /* congestion notification */
  51. #define NET_XMIT_POLICED 3 /* skb is shot by police */
  52. #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
  53. (TC use only - dev_queue_xmit
  54. returns this as NET_XMIT_SUCCESS) */
  55. /* Backlog congestion levels */
  56. #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
  57. #define NET_RX_DROP 1 /* packet dropped */
  58. #define NET_RX_CN_LOW 2 /* storm alert, just in case */
  59. #define NET_RX_CN_MOD 3 /* Storm on its way! */
  60. #define NET_RX_CN_HIGH 4 /* The storm is here */
  61. #define NET_RX_BAD 5 /* packet dropped due to kernel error */
  62. #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
  63. #endif
  64. #define MAX_ADDR_LEN 32 /* Largest hardware address length */
  65. /* Driver transmit return codes */
  66. #define NETDEV_TX_OK 0 /* driver took care of packet */
  67. #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
  68. #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
  69. /*
  70. * Compute the worst case header length according to the protocols
  71. * used.
  72. */
  73. #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
  74. #define LL_MAX_HEADER 32
  75. #else
  76. #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
  77. #define LL_MAX_HEADER 96
  78. #else
  79. #define LL_MAX_HEADER 48
  80. #endif
  81. #endif
  82. #if !defined(CONFIG_NET_IPIP) && \
  83. !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
  84. #define MAX_HEADER LL_MAX_HEADER
  85. #else
  86. #define MAX_HEADER (LL_MAX_HEADER + 48)
  87. #endif
  88. /*
  89. * Network device statistics. Akin to the 2.0 ether stats but
  90. * with byte counters.
  91. */
  92. struct net_device_stats
  93. {
  94. unsigned long rx_packets; /* total packets received */
  95. unsigned long tx_packets; /* total packets transmitted */
  96. unsigned long rx_bytes; /* total bytes received */
  97. unsigned long tx_bytes; /* total bytes transmitted */
  98. unsigned long rx_errors; /* bad packets received */
  99. unsigned long tx_errors; /* packet transmit problems */
  100. unsigned long rx_dropped; /* no space in linux buffers */
  101. unsigned long tx_dropped; /* no space available in linux */
  102. unsigned long multicast; /* multicast packets received */
  103. unsigned long collisions;
  104. /* detailed rx_errors: */
  105. unsigned long rx_length_errors;
  106. unsigned long rx_over_errors; /* receiver ring buff overflow */
  107. unsigned long rx_crc_errors; /* recved pkt with crc error */
  108. unsigned long rx_frame_errors; /* recv'd frame alignment error */
  109. unsigned long rx_fifo_errors; /* recv'r fifo overrun */
  110. unsigned long rx_missed_errors; /* receiver missed packet */
  111. /* detailed tx_errors */
  112. unsigned long tx_aborted_errors;
  113. unsigned long tx_carrier_errors;
  114. unsigned long tx_fifo_errors;
  115. unsigned long tx_heartbeat_errors;
  116. unsigned long tx_window_errors;
  117. /* for cslip etc */
  118. unsigned long rx_compressed;
  119. unsigned long tx_compressed;
  120. };
  121. /* Media selection options. */
  122. enum {
  123. IF_PORT_UNKNOWN = 0,
  124. IF_PORT_10BASE2,
  125. IF_PORT_10BASET,
  126. IF_PORT_AUI,
  127. IF_PORT_100BASET,
  128. IF_PORT_100BASETX,
  129. IF_PORT_100BASEFX
  130. };
  131. #ifdef __KERNEL__
  132. #include <linux/cache.h>
  133. #include <linux/skbuff.h>
  134. struct neighbour;
  135. struct neigh_parms;
  136. struct sk_buff;
  137. struct netif_rx_stats
  138. {
  139. unsigned total;
  140. unsigned dropped;
  141. unsigned time_squeeze;
  142. unsigned cpu_collision;
  143. };
  144. DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
  145. /*
  146. * We tag multicasts with these structures.
  147. */
  148. struct dev_mc_list
  149. {
  150. struct dev_mc_list *next;
  151. __u8 dmi_addr[MAX_ADDR_LEN];
  152. unsigned char dmi_addrlen;
  153. int dmi_users;
  154. int dmi_gusers;
  155. };
  156. struct hh_cache
  157. {
  158. struct hh_cache *hh_next; /* Next entry */
  159. atomic_t hh_refcnt; /* number of users */
  160. unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
  161. * NOTE: For VLANs, this will be the
  162. * encapuslated type. --BLG
  163. */
  164. int hh_len; /* length of header */
  165. int (*hh_output)(struct sk_buff *skb);
  166. rwlock_t hh_lock;
  167. /* cached hardware header; allow for machine alignment needs. */
  168. #define HH_DATA_MOD 16
  169. #define HH_DATA_OFF(__len) \
  170. (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
  171. #define HH_DATA_ALIGN(__len) \
  172. (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
  173. unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
  174. };
  175. /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
  176. * Alternative is:
  177. * dev->hard_header_len ? (dev->hard_header_len +
  178. * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
  179. *
  180. * We could use other alignment values, but we must maintain the
  181. * relationship HH alignment <= LL alignment.
  182. */
  183. #define LL_RESERVED_SPACE(dev) \
  184. (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  185. #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
  186. ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
  187. /* These flag bits are private to the generic network queueing
  188. * layer, they may not be explicitly referenced by any other
  189. * code.
  190. */
  191. enum netdev_state_t
  192. {
  193. __LINK_STATE_XOFF=0,
  194. __LINK_STATE_START,
  195. __LINK_STATE_PRESENT,
  196. __LINK_STATE_SCHED,
  197. __LINK_STATE_NOCARRIER,
  198. __LINK_STATE_RX_SCHED,
  199. __LINK_STATE_LINKWATCH_PENDING,
  200. __LINK_STATE_DORMANT,
  201. __LINK_STATE_QDISC_RUNNING,
  202. };
  203. /*
  204. * This structure holds at boot time configured netdevice settings. They
  205. * are then used in the device probing.
  206. */
  207. struct netdev_boot_setup {
  208. char name[IFNAMSIZ];
  209. struct ifmap map;
  210. };
  211. #define NETDEV_BOOT_SETUP_MAX 8
  212. extern int __init netdev_boot_setup(char *str);
  213. /*
  214. * The DEVICE structure.
  215. * Actually, this whole structure is a big mistake. It mixes I/O
  216. * data with strictly "high-level" data, and it has to know about
  217. * almost every data structure used in the INET module.
  218. *
  219. * FIXME: cleanup struct net_device such that network protocol info
  220. * moves out.
  221. */
  222. struct net_device
  223. {
  224. /*
  225. * This is the first field of the "visible" part of this structure
  226. * (i.e. as seen by users in the "Space.c" file). It is the name
  227. * the interface.
  228. */
  229. char name[IFNAMSIZ];
  230. /* device name hash chain */
  231. struct hlist_node name_hlist;
  232. /*
  233. * I/O specific fields
  234. * FIXME: Merge these and struct ifmap into one
  235. */
  236. unsigned long mem_end; /* shared mem end */
  237. unsigned long mem_start; /* shared mem start */
  238. unsigned long base_addr; /* device I/O address */
  239. unsigned int irq; /* device IRQ number */
  240. /*
  241. * Some hardware also needs these fields, but they are not
  242. * part of the usual set specified in Space.c.
  243. */
  244. unsigned char if_port; /* Selectable AUI, TP,..*/
  245. unsigned char dma; /* DMA channel */
  246. unsigned long state;
  247. struct net_device *next;
  248. /* The device initialization function. Called only once. */
  249. int (*init)(struct net_device *dev);
  250. /* ------- Fields preinitialized in Space.c finish here ------- */
  251. /* Net device features */
  252. unsigned long features;
  253. #define NETIF_F_SG 1 /* Scatter/gather IO. */
  254. #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
  255. #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
  256. #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
  257. #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
  258. #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
  259. #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
  260. #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
  261. #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
  262. #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
  263. #define NETIF_F_GSO 2048 /* Enable software GSO. */
  264. #define NETIF_F_LLTX 4096 /* LockLess TX */
  265. /* Segmentation offload features */
  266. #define NETIF_F_GSO_SHIFT 16
  267. #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
  268. #define NETIF_F_UFO (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT)
  269. #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
  270. #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
  271. struct net_device *next_sched;
  272. /* Interface index. Unique device identifier */
  273. int ifindex;
  274. int iflink;
  275. struct net_device_stats* (*get_stats)(struct net_device *dev);
  276. struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
  277. /* List of functions to handle Wireless Extensions (instead of ioctl).
  278. * See <net/iw_handler.h> for details. Jean II */
  279. const struct iw_handler_def * wireless_handlers;
  280. /* Instance data managed by the core of Wireless Extensions. */
  281. struct iw_public_data * wireless_data;
  282. struct ethtool_ops *ethtool_ops;
  283. /*
  284. * This marks the end of the "visible" part of the structure. All
  285. * fields hereafter are internal to the system, and may change at
  286. * will (read: may be cleaned up at will).
  287. */
  288. unsigned int flags; /* interface flags (a la BSD) */
  289. unsigned short gflags;
  290. unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
  291. unsigned short padded; /* How much padding added by alloc_netdev() */
  292. unsigned char operstate; /* RFC2863 operstate */
  293. unsigned char link_mode; /* mapping policy to operstate */
  294. unsigned mtu; /* interface MTU value */
  295. unsigned short type; /* interface hardware type */
  296. unsigned short hard_header_len; /* hardware hdr length */
  297. struct net_device *master; /* Pointer to master device of a group,
  298. * which this device is member of.
  299. */
  300. /* Interface address info. */
  301. unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
  302. unsigned char addr_len; /* hardware address length */
  303. unsigned short dev_id; /* for shared network cards */
  304. struct dev_mc_list *mc_list; /* Multicast mac addresses */
  305. int mc_count; /* Number of installed mcasts */
  306. int promiscuity;
  307. int allmulti;
  308. /* Protocol specific pointers */
  309. void *atalk_ptr; /* AppleTalk link */
  310. void *ip_ptr; /* IPv4 specific data */
  311. void *dn_ptr; /* DECnet specific data */
  312. void *ip6_ptr; /* IPv6 specific data */
  313. void *ec_ptr; /* Econet specific data */
  314. void *ax25_ptr; /* AX.25 specific data */
  315. /*
  316. * Cache line mostly used on receive path (including eth_type_trans())
  317. */
  318. struct list_head poll_list ____cacheline_aligned_in_smp;
  319. /* Link to poll list */
  320. int (*poll) (struct net_device *dev, int *quota);
  321. int quota;
  322. int weight;
  323. unsigned long last_rx; /* Time of last Rx */
  324. /* Interface address info used in eth_type_trans() */
  325. unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
  326. because most packets are unicast) */
  327. unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
  328. /*
  329. * Cache line mostly used on queue transmit path (qdisc)
  330. */
  331. /* device queue lock */
  332. spinlock_t queue_lock ____cacheline_aligned_in_smp;
  333. struct Qdisc *qdisc;
  334. struct Qdisc *qdisc_sleeping;
  335. struct list_head qdisc_list;
  336. unsigned long tx_queue_len; /* Max frames per queue allowed */
  337. /* Partially transmitted GSO packet. */
  338. struct sk_buff *gso_skb;
  339. /* ingress path synchronizer */
  340. spinlock_t ingress_lock;
  341. struct Qdisc *qdisc_ingress;
  342. /*
  343. * One part is mostly used on xmit path (device)
  344. */
  345. /* hard_start_xmit synchronizer */
  346. spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
  347. /* cpu id of processor entered to hard_start_xmit or -1,
  348. if nobody entered there.
  349. */
  350. int xmit_lock_owner;
  351. void *priv; /* pointer to private data */
  352. int (*hard_start_xmit) (struct sk_buff *skb,
  353. struct net_device *dev);
  354. /* These may be needed for future network-power-down code. */
  355. unsigned long trans_start; /* Time (in jiffies) of last Tx */
  356. int watchdog_timeo; /* used by dev_watchdog() */
  357. struct timer_list watchdog_timer;
  358. /*
  359. * refcnt is a very hot point, so align it on SMP
  360. */
  361. /* Number of references to this device */
  362. atomic_t refcnt ____cacheline_aligned_in_smp;
  363. /* delayed register/unregister */
  364. struct list_head todo_list;
  365. /* device index hash chain */
  366. struct hlist_node index_hlist;
  367. /* register/unregister state machine */
  368. enum { NETREG_UNINITIALIZED=0,
  369. NETREG_REGISTERED, /* completed register_netdevice */
  370. NETREG_UNREGISTERING, /* called unregister_netdevice */
  371. NETREG_UNREGISTERED, /* completed unregister todo */
  372. NETREG_RELEASED, /* called free_netdev */
  373. } reg_state;
  374. /* Called after device is detached from network. */
  375. void (*uninit)(struct net_device *dev);
  376. /* Called after last user reference disappears. */
  377. void (*destructor)(struct net_device *dev);
  378. /* Pointers to interface service routines. */
  379. int (*open)(struct net_device *dev);
  380. int (*stop)(struct net_device *dev);
  381. #define HAVE_NETDEV_POLL
  382. int (*hard_header) (struct sk_buff *skb,
  383. struct net_device *dev,
  384. unsigned short type,
  385. void *daddr,
  386. void *saddr,
  387. unsigned len);
  388. int (*rebuild_header)(struct sk_buff *skb);
  389. #define HAVE_MULTICAST
  390. void (*set_multicast_list)(struct net_device *dev);
  391. #define HAVE_SET_MAC_ADDR
  392. int (*set_mac_address)(struct net_device *dev,
  393. void *addr);
  394. #define HAVE_PRIVATE_IOCTL
  395. int (*do_ioctl)(struct net_device *dev,
  396. struct ifreq *ifr, int cmd);
  397. #define HAVE_SET_CONFIG
  398. int (*set_config)(struct net_device *dev,
  399. struct ifmap *map);
  400. #define HAVE_HEADER_CACHE
  401. int (*hard_header_cache)(struct neighbour *neigh,
  402. struct hh_cache *hh);
  403. void (*header_cache_update)(struct hh_cache *hh,
  404. struct net_device *dev,
  405. unsigned char * haddr);
  406. #define HAVE_CHANGE_MTU
  407. int (*change_mtu)(struct net_device *dev, int new_mtu);
  408. #define HAVE_TX_TIMEOUT
  409. void (*tx_timeout) (struct net_device *dev);
  410. void (*vlan_rx_register)(struct net_device *dev,
  411. struct vlan_group *grp);
  412. void (*vlan_rx_add_vid)(struct net_device *dev,
  413. unsigned short vid);
  414. void (*vlan_rx_kill_vid)(struct net_device *dev,
  415. unsigned short vid);
  416. int (*hard_header_parse)(struct sk_buff *skb,
  417. unsigned char *haddr);
  418. int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
  419. #ifdef CONFIG_NETPOLL
  420. struct netpoll_info *npinfo;
  421. #endif
  422. #ifdef CONFIG_NET_POLL_CONTROLLER
  423. void (*poll_controller)(struct net_device *dev);
  424. #endif
  425. /* bridge stuff */
  426. struct net_bridge_port *br_port;
  427. #ifdef CONFIG_NET_DIVERT
  428. /* this will get initialized at each interface type init routine */
  429. struct divert_blk *divert;
  430. #endif /* CONFIG_NET_DIVERT */
  431. /* class/net/name entry */
  432. struct class_device class_dev;
  433. /* space for optional statistics and wireless sysfs groups */
  434. struct attribute_group *sysfs_groups[3];
  435. };
  436. #define NETDEV_ALIGN 32
  437. #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
  438. static inline void *netdev_priv(struct net_device *dev)
  439. {
  440. return (char *)dev + ((sizeof(struct net_device)
  441. + NETDEV_ALIGN_CONST)
  442. & ~NETDEV_ALIGN_CONST);
  443. }
  444. #define SET_MODULE_OWNER(dev) do { } while (0)
  445. /* Set the sysfs physical device reference for the network logical device
  446. * if set prior to registration will cause a symlink during initialization.
  447. */
  448. #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
  449. struct packet_type {
  450. __be16 type; /* This is really htons(ether_type). */
  451. struct net_device *dev; /* NULL is wildcarded here */
  452. int (*func) (struct sk_buff *,
  453. struct net_device *,
  454. struct packet_type *,
  455. struct net_device *);
  456. struct sk_buff *(*gso_segment)(struct sk_buff *skb, int sg);
  457. void *af_packet_priv;
  458. struct list_head list;
  459. };
  460. #include <linux/interrupt.h>
  461. #include <linux/notifier.h>
  462. extern struct net_device loopback_dev; /* The loopback */
  463. extern struct net_device *dev_base; /* All devices */
  464. extern rwlock_t dev_base_lock; /* Device list lock */
  465. extern int netdev_boot_setup_check(struct net_device *dev);
  466. extern unsigned long netdev_boot_base(const char *prefix, int unit);
  467. extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
  468. extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
  469. extern void dev_add_pack(struct packet_type *pt);
  470. extern void dev_remove_pack(struct packet_type *pt);
  471. extern void __dev_remove_pack(struct packet_type *pt);
  472. extern struct net_device *dev_get_by_flags(unsigned short flags,
  473. unsigned short mask);
  474. extern struct net_device *dev_get_by_name(const char *name);
  475. extern struct net_device *__dev_get_by_name(const char *name);
  476. extern int dev_alloc_name(struct net_device *dev, const char *name);
  477. extern int dev_open(struct net_device *dev);
  478. extern int dev_close(struct net_device *dev);
  479. extern int dev_queue_xmit(struct sk_buff *skb);
  480. extern int register_netdevice(struct net_device *dev);
  481. extern int unregister_netdevice(struct net_device *dev);
  482. extern void free_netdev(struct net_device *dev);
  483. extern void synchronize_net(void);
  484. extern int register_netdevice_notifier(struct notifier_block *nb);
  485. extern int unregister_netdevice_notifier(struct notifier_block *nb);
  486. extern int call_netdevice_notifiers(unsigned long val, void *v);
  487. extern struct net_device *dev_get_by_index(int ifindex);
  488. extern struct net_device *__dev_get_by_index(int ifindex);
  489. extern int dev_restart(struct net_device *dev);
  490. #ifdef CONFIG_NETPOLL_TRAP
  491. extern int netpoll_trap(void);
  492. #endif
  493. typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
  494. extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
  495. static inline int unregister_gifconf(unsigned int family)
  496. {
  497. return register_gifconf(family, NULL);
  498. }
  499. /*
  500. * Incoming packets are placed on per-cpu queues so that
  501. * no locking is needed.
  502. */
  503. struct softnet_data
  504. {
  505. struct net_device *output_queue;
  506. struct sk_buff_head input_pkt_queue;
  507. struct list_head poll_list;
  508. struct sk_buff *completion_queue;
  509. struct net_device backlog_dev; /* Sorry. 8) */
  510. #ifdef CONFIG_NET_DMA
  511. struct dma_chan *net_dma;
  512. #endif
  513. };
  514. DECLARE_PER_CPU(struct softnet_data,softnet_data);
  515. #define HAVE_NETIF_QUEUE
  516. extern void __netif_schedule(struct net_device *dev);
  517. static inline void netif_schedule(struct net_device *dev)
  518. {
  519. if (!test_bit(__LINK_STATE_XOFF, &dev->state))
  520. __netif_schedule(dev);
  521. }
  522. static inline void netif_start_queue(struct net_device *dev)
  523. {
  524. clear_bit(__LINK_STATE_XOFF, &dev->state);
  525. }
  526. static inline void netif_wake_queue(struct net_device *dev)
  527. {
  528. #ifdef CONFIG_NETPOLL_TRAP
  529. if (netpoll_trap())
  530. return;
  531. #endif
  532. if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
  533. __netif_schedule(dev);
  534. }
  535. static inline void netif_stop_queue(struct net_device *dev)
  536. {
  537. #ifdef CONFIG_NETPOLL_TRAP
  538. if (netpoll_trap())
  539. return;
  540. #endif
  541. set_bit(__LINK_STATE_XOFF, &dev->state);
  542. }
  543. static inline int netif_queue_stopped(const struct net_device *dev)
  544. {
  545. return test_bit(__LINK_STATE_XOFF, &dev->state);
  546. }
  547. static inline int netif_running(const struct net_device *dev)
  548. {
  549. return test_bit(__LINK_STATE_START, &dev->state);
  550. }
  551. /* Use this variant when it is known for sure that it
  552. * is executing from interrupt context.
  553. */
  554. static inline void dev_kfree_skb_irq(struct sk_buff *skb)
  555. {
  556. if (atomic_dec_and_test(&skb->users)) {
  557. struct softnet_data *sd;
  558. unsigned long flags;
  559. local_irq_save(flags);
  560. sd = &__get_cpu_var(softnet_data);
  561. skb->next = sd->completion_queue;
  562. sd->completion_queue = skb;
  563. raise_softirq_irqoff(NET_TX_SOFTIRQ);
  564. local_irq_restore(flags);
  565. }
  566. }
  567. /* Use this variant in places where it could be invoked
  568. * either from interrupt or non-interrupt context.
  569. */
  570. extern void dev_kfree_skb_any(struct sk_buff *skb);
  571. #define HAVE_NETIF_RX 1
  572. extern int netif_rx(struct sk_buff *skb);
  573. extern int netif_rx_ni(struct sk_buff *skb);
  574. #define HAVE_NETIF_RECEIVE_SKB 1
  575. extern int netif_receive_skb(struct sk_buff *skb);
  576. extern int dev_valid_name(const char *name);
  577. extern int dev_ioctl(unsigned int cmd, void __user *);
  578. extern int dev_ethtool(struct ifreq *);
  579. extern unsigned dev_get_flags(const struct net_device *);
  580. extern int dev_change_flags(struct net_device *, unsigned);
  581. extern int dev_change_name(struct net_device *, char *);
  582. extern int dev_set_mtu(struct net_device *, int);
  583. extern int dev_set_mac_address(struct net_device *,
  584. struct sockaddr *);
  585. extern int dev_hard_start_xmit(struct sk_buff *skb,
  586. struct net_device *dev);
  587. extern void dev_init(void);
  588. extern int netdev_nit;
  589. extern int netdev_budget;
  590. /* Called by rtnetlink.c:rtnl_unlock() */
  591. extern void netdev_run_todo(void);
  592. static inline void dev_put(struct net_device *dev)
  593. {
  594. atomic_dec(&dev->refcnt);
  595. }
  596. static inline void dev_hold(struct net_device *dev)
  597. {
  598. atomic_inc(&dev->refcnt);
  599. }
  600. /* Carrier loss detection, dial on demand. The functions netif_carrier_on
  601. * and _off may be called from IRQ context, but it is caller
  602. * who is responsible for serialization of these calls.
  603. *
  604. * The name carrier is inappropriate, these functions should really be
  605. * called netif_lowerlayer_*() because they represent the state of any
  606. * kind of lower layer not just hardware media.
  607. */
  608. extern void linkwatch_fire_event(struct net_device *dev);
  609. static inline int netif_carrier_ok(const struct net_device *dev)
  610. {
  611. return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
  612. }
  613. extern void __netdev_watchdog_up(struct net_device *dev);
  614. extern void netif_carrier_on(struct net_device *dev);
  615. extern void netif_carrier_off(struct net_device *dev);
  616. static inline void netif_dormant_on(struct net_device *dev)
  617. {
  618. if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
  619. linkwatch_fire_event(dev);
  620. }
  621. static inline void netif_dormant_off(struct net_device *dev)
  622. {
  623. if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
  624. linkwatch_fire_event(dev);
  625. }
  626. static inline int netif_dormant(const struct net_device *dev)
  627. {
  628. return test_bit(__LINK_STATE_DORMANT, &dev->state);
  629. }
  630. static inline int netif_oper_up(const struct net_device *dev) {
  631. return (dev->operstate == IF_OPER_UP ||
  632. dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
  633. }
  634. /* Hot-plugging. */
  635. static inline int netif_device_present(struct net_device *dev)
  636. {
  637. return test_bit(__LINK_STATE_PRESENT, &dev->state);
  638. }
  639. extern void netif_device_detach(struct net_device *dev);
  640. extern void netif_device_attach(struct net_device *dev);
  641. /*
  642. * Network interface message level settings
  643. */
  644. #define HAVE_NETIF_MSG 1
  645. enum {
  646. NETIF_MSG_DRV = 0x0001,
  647. NETIF_MSG_PROBE = 0x0002,
  648. NETIF_MSG_LINK = 0x0004,
  649. NETIF_MSG_TIMER = 0x0008,
  650. NETIF_MSG_IFDOWN = 0x0010,
  651. NETIF_MSG_IFUP = 0x0020,
  652. NETIF_MSG_RX_ERR = 0x0040,
  653. NETIF_MSG_TX_ERR = 0x0080,
  654. NETIF_MSG_TX_QUEUED = 0x0100,
  655. NETIF_MSG_INTR = 0x0200,
  656. NETIF_MSG_TX_DONE = 0x0400,
  657. NETIF_MSG_RX_STATUS = 0x0800,
  658. NETIF_MSG_PKTDATA = 0x1000,
  659. NETIF_MSG_HW = 0x2000,
  660. NETIF_MSG_WOL = 0x4000,
  661. };
  662. #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
  663. #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
  664. #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
  665. #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
  666. #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
  667. #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
  668. #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
  669. #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
  670. #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
  671. #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
  672. #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
  673. #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
  674. #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
  675. #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
  676. #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
  677. static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
  678. {
  679. /* use default */
  680. if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
  681. return default_msg_enable_bits;
  682. if (debug_value == 0) /* no output */
  683. return 0;
  684. /* set low N bits */
  685. return (1 << debug_value) - 1;
  686. }
  687. /* Test if receive needs to be scheduled */
  688. static inline int __netif_rx_schedule_prep(struct net_device *dev)
  689. {
  690. return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
  691. }
  692. /* Test if receive needs to be scheduled but only if up */
  693. static inline int netif_rx_schedule_prep(struct net_device *dev)
  694. {
  695. return netif_running(dev) && __netif_rx_schedule_prep(dev);
  696. }
  697. /* Add interface to tail of rx poll list. This assumes that _prep has
  698. * already been called and returned 1.
  699. */
  700. extern void __netif_rx_schedule(struct net_device *dev);
  701. /* Try to reschedule poll. Called by irq handler. */
  702. static inline void netif_rx_schedule(struct net_device *dev)
  703. {
  704. if (netif_rx_schedule_prep(dev))
  705. __netif_rx_schedule(dev);
  706. }
  707. /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
  708. * Do not inline this?
  709. */
  710. static inline int netif_rx_reschedule(struct net_device *dev, int undo)
  711. {
  712. if (netif_rx_schedule_prep(dev)) {
  713. unsigned long flags;
  714. dev->quota += undo;
  715. local_irq_save(flags);
  716. list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
  717. __raise_softirq_irqoff(NET_RX_SOFTIRQ);
  718. local_irq_restore(flags);
  719. return 1;
  720. }
  721. return 0;
  722. }
  723. /* Remove interface from poll list: it must be in the poll list
  724. * on current cpu. This primitive is called by dev->poll(), when
  725. * it completes the work. The device cannot be out of poll list at this
  726. * moment, it is BUG().
  727. */
  728. static inline void netif_rx_complete(struct net_device *dev)
  729. {
  730. unsigned long flags;
  731. local_irq_save(flags);
  732. BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
  733. list_del(&dev->poll_list);
  734. smp_mb__before_clear_bit();
  735. clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
  736. local_irq_restore(flags);
  737. }
  738. static inline void netif_poll_disable(struct net_device *dev)
  739. {
  740. while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
  741. /* No hurry. */
  742. schedule_timeout_interruptible(1);
  743. }
  744. static inline void netif_poll_enable(struct net_device *dev)
  745. {
  746. clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
  747. }
  748. /* same as netif_rx_complete, except that local_irq_save(flags)
  749. * has already been issued
  750. */
  751. static inline void __netif_rx_complete(struct net_device *dev)
  752. {
  753. BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
  754. list_del(&dev->poll_list);
  755. smp_mb__before_clear_bit();
  756. clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
  757. }
  758. static inline void netif_tx_lock(struct net_device *dev)
  759. {
  760. spin_lock(&dev->_xmit_lock);
  761. dev->xmit_lock_owner = smp_processor_id();
  762. }
  763. static inline void netif_tx_lock_bh(struct net_device *dev)
  764. {
  765. spin_lock_bh(&dev->_xmit_lock);
  766. dev->xmit_lock_owner = smp_processor_id();
  767. }
  768. static inline int netif_tx_trylock(struct net_device *dev)
  769. {
  770. int err = spin_trylock(&dev->_xmit_lock);
  771. if (!err)
  772. dev->xmit_lock_owner = smp_processor_id();
  773. return err;
  774. }
  775. static inline void netif_tx_unlock(struct net_device *dev)
  776. {
  777. dev->xmit_lock_owner = -1;
  778. spin_unlock(&dev->_xmit_lock);
  779. }
  780. static inline void netif_tx_unlock_bh(struct net_device *dev)
  781. {
  782. dev->xmit_lock_owner = -1;
  783. spin_unlock_bh(&dev->_xmit_lock);
  784. }
  785. static inline void netif_tx_disable(struct net_device *dev)
  786. {
  787. netif_tx_lock_bh(dev);
  788. netif_stop_queue(dev);
  789. netif_tx_unlock_bh(dev);
  790. }
  791. /* These functions live elsewhere (drivers/net/net_init.c, but related) */
  792. extern void ether_setup(struct net_device *dev);
  793. /* Support for loadable net-drivers */
  794. extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
  795. void (*setup)(struct net_device *));
  796. extern int register_netdev(struct net_device *dev);
  797. extern void unregister_netdev(struct net_device *dev);
  798. /* Functions used for multicast support */
  799. extern void dev_mc_upload(struct net_device *dev);
  800. extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
  801. extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
  802. extern void dev_mc_discard(struct net_device *dev);
  803. extern void dev_set_promiscuity(struct net_device *dev, int inc);
  804. extern void dev_set_allmulti(struct net_device *dev, int inc);
  805. extern void netdev_state_change(struct net_device *dev);
  806. extern void netdev_features_change(struct net_device *dev);
  807. /* Load a device via the kmod */
  808. extern void dev_load(const char *name);
  809. extern void dev_mcast_init(void);
  810. extern int netdev_max_backlog;
  811. extern int weight_p;
  812. extern int netdev_set_master(struct net_device *dev, struct net_device *master);
  813. extern int skb_checksum_help(struct sk_buff *skb, int inward);
  814. extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int sg);
  815. #ifdef CONFIG_BUG
  816. extern void netdev_rx_csum_fault(struct net_device *dev);
  817. #else
  818. static inline void netdev_rx_csum_fault(struct net_device *dev)
  819. {
  820. }
  821. #endif
  822. /* rx skb timestamps */
  823. extern void net_enable_timestamp(void);
  824. extern void net_disable_timestamp(void);
  825. #ifdef CONFIG_PROC_FS
  826. extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
  827. extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  828. extern void dev_seq_stop(struct seq_file *seq, void *v);
  829. #endif
  830. extern void linkwatch_run_queue(void);
  831. static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
  832. {
  833. int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT;
  834. return skb_shinfo(skb)->gso_size &&
  835. (dev->features & feature) != feature;
  836. }
  837. #endif /* __KERNEL__ */
  838. #endif /* _LINUX_DEV_H */