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1da177e4 LT |
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 | * | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
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 | ||
28 | #include <linux/if.h> | |
29 | #include <linux/if_ether.h> | |
30 | #include <linux/if_packet.h> | |
31 | ||
32 | #ifdef __KERNEL__ | |
d7fe0f24 | 33 | #include <linux/timer.h> |
1da177e4 LT |
34 | #include <asm/atomic.h> |
35 | #include <asm/cache.h> | |
36 | #include <asm/byteorder.h> | |
37 | ||
1da177e4 LT |
38 | #include <linux/device.h> |
39 | #include <linux/percpu.h> | |
db217334 | 40 | #include <linux/dmaengine.h> |
1da177e4 | 41 | |
1da177e4 LT |
42 | struct vlan_group; |
43 | struct ethtool_ops; | |
115c1d6e | 44 | struct netpoll_info; |
704232c2 JB |
45 | /* 802.11 specific */ |
46 | struct wireless_dev; | |
1da177e4 LT |
47 | /* source back-compat hooks */ |
48 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
49 | ( (netdev)->ethtool_ops = (ops) ) | |
50 | ||
51 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
52 | functions are available. */ | |
53 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
54 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
55 | ||
56 | #define NET_XMIT_SUCCESS 0 | |
57 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
58 | #define NET_XMIT_CN 2 /* congestion notification */ | |
59 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
60 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; | |
61 | (TC use only - dev_queue_xmit | |
62 | returns this as NET_XMIT_SUCCESS) */ | |
63 | ||
64 | /* Backlog congestion levels */ | |
65 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
66 | #define NET_RX_DROP 1 /* packet dropped */ | |
67 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ | |
68 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ | |
69 | #define NET_RX_CN_HIGH 4 /* The storm is here */ | |
70 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ | |
71 | ||
b9df3cb8 GR |
72 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
73 | * indicates that the device will soon be dropping packets, or already drops | |
74 | * some packets of the same priority; prompting us to send less aggressively. */ | |
75 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) | |
1da177e4 LT |
76 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
77 | ||
78 | #endif | |
79 | ||
80 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
81 | ||
82 | /* Driver transmit return codes */ | |
83 | #define NETDEV_TX_OK 0 /* driver took care of packet */ | |
84 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ | |
85 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ | |
86 | ||
87 | /* | |
88 | * Compute the worst case header length according to the protocols | |
89 | * used. | |
90 | */ | |
91 | ||
92 | #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) | |
93 | #define LL_MAX_HEADER 32 | |
94 | #else | |
95 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
96 | #define LL_MAX_HEADER 96 | |
97 | #else | |
98 | #define LL_MAX_HEADER 48 | |
99 | #endif | |
100 | #endif | |
101 | ||
e81c7359 DM |
102 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
103 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
104 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
105 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
1da177e4 LT |
106 | #define MAX_HEADER LL_MAX_HEADER |
107 | #else | |
108 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
109 | #endif | |
110 | ||
f25f4e44 PWJ |
111 | struct net_device_subqueue |
112 | { | |
113 | /* Give a control state for each queue. This struct may contain | |
114 | * per-queue locks in the future. | |
115 | */ | |
116 | unsigned long state; | |
117 | }; | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Network device statistics. Akin to the 2.0 ether stats but | |
121 | * with byte counters. | |
122 | */ | |
123 | ||
124 | struct net_device_stats | |
125 | { | |
126 | unsigned long rx_packets; /* total packets received */ | |
127 | unsigned long tx_packets; /* total packets transmitted */ | |
128 | unsigned long rx_bytes; /* total bytes received */ | |
129 | unsigned long tx_bytes; /* total bytes transmitted */ | |
130 | unsigned long rx_errors; /* bad packets received */ | |
131 | unsigned long tx_errors; /* packet transmit problems */ | |
132 | unsigned long rx_dropped; /* no space in linux buffers */ | |
133 | unsigned long tx_dropped; /* no space available in linux */ | |
134 | unsigned long multicast; /* multicast packets received */ | |
135 | unsigned long collisions; | |
136 | ||
137 | /* detailed rx_errors: */ | |
138 | unsigned long rx_length_errors; | |
139 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
140 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
141 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
142 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
143 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
144 | ||
145 | /* detailed tx_errors */ | |
146 | unsigned long tx_aborted_errors; | |
147 | unsigned long tx_carrier_errors; | |
148 | unsigned long tx_fifo_errors; | |
149 | unsigned long tx_heartbeat_errors; | |
150 | unsigned long tx_window_errors; | |
151 | ||
152 | /* for cslip etc */ | |
153 | unsigned long rx_compressed; | |
154 | unsigned long tx_compressed; | |
155 | }; | |
156 | ||
157 | ||
158 | /* Media selection options. */ | |
159 | enum { | |
160 | IF_PORT_UNKNOWN = 0, | |
161 | IF_PORT_10BASE2, | |
162 | IF_PORT_10BASET, | |
163 | IF_PORT_AUI, | |
164 | IF_PORT_100BASET, | |
165 | IF_PORT_100BASETX, | |
166 | IF_PORT_100BASEFX | |
167 | }; | |
168 | ||
169 | #ifdef __KERNEL__ | |
170 | ||
171 | #include <linux/cache.h> | |
172 | #include <linux/skbuff.h> | |
173 | ||
174 | struct neighbour; | |
175 | struct neigh_parms; | |
176 | struct sk_buff; | |
177 | ||
178 | struct netif_rx_stats | |
179 | { | |
180 | unsigned total; | |
181 | unsigned dropped; | |
182 | unsigned time_squeeze; | |
1da177e4 LT |
183 | unsigned cpu_collision; |
184 | }; | |
185 | ||
186 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
187 | ||
bf742482 PM |
188 | struct dev_addr_list |
189 | { | |
190 | struct dev_addr_list *next; | |
191 | u8 da_addr[MAX_ADDR_LEN]; | |
192 | u8 da_addrlen; | |
193 | int da_users; | |
194 | int da_gusers; | |
195 | }; | |
1da177e4 LT |
196 | |
197 | /* | |
198 | * We tag multicasts with these structures. | |
199 | */ | |
3fba5a8b PM |
200 | |
201 | #define dev_mc_list dev_addr_list | |
202 | #define dmi_addr da_addr | |
203 | #define dmi_addrlen da_addrlen | |
204 | #define dmi_users da_users | |
205 | #define dmi_gusers da_gusers | |
1da177e4 LT |
206 | |
207 | struct hh_cache | |
208 | { | |
209 | struct hh_cache *hh_next; /* Next entry */ | |
210 | atomic_t hh_refcnt; /* number of users */ | |
f0490980 ED |
211 | /* |
212 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
213 | * cache line on SMP. | |
214 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
215 | * incurring cache line ping pongs. | |
216 | */ | |
217 | __be16 hh_type ____cacheline_aligned_in_smp; | |
218 | /* protocol identifier, f.e ETH_P_IP | |
1da177e4 LT |
219 | * NOTE: For VLANs, this will be the |
220 | * encapuslated type. --BLG | |
221 | */ | |
d5c42c0e | 222 | u16 hh_len; /* length of header */ |
1da177e4 | 223 | int (*hh_output)(struct sk_buff *skb); |
3644f0ce | 224 | seqlock_t hh_lock; |
1da177e4 LT |
225 | |
226 | /* cached hardware header; allow for machine alignment needs. */ | |
227 | #define HH_DATA_MOD 16 | |
228 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 229 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
230 | #define HH_DATA_ALIGN(__len) \ |
231 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
232 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
233 | }; | |
234 | ||
235 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
236 | * Alternative is: | |
237 | * dev->hard_header_len ? (dev->hard_header_len + | |
238 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
239 | * | |
240 | * We could use other alignment values, but we must maintain the | |
241 | * relationship HH alignment <= LL alignment. | |
242 | */ | |
243 | #define LL_RESERVED_SPACE(dev) \ | |
244 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
245 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
246 | ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
247 | ||
248 | /* These flag bits are private to the generic network queueing | |
249 | * layer, they may not be explicitly referenced by any other | |
250 | * code. | |
251 | */ | |
252 | ||
253 | enum netdev_state_t | |
254 | { | |
255 | __LINK_STATE_XOFF=0, | |
256 | __LINK_STATE_START, | |
257 | __LINK_STATE_PRESENT, | |
258 | __LINK_STATE_SCHED, | |
259 | __LINK_STATE_NOCARRIER, | |
260 | __LINK_STATE_RX_SCHED, | |
b00055aa SR |
261 | __LINK_STATE_LINKWATCH_PENDING, |
262 | __LINK_STATE_DORMANT, | |
48d83325 | 263 | __LINK_STATE_QDISC_RUNNING, |
1da177e4 LT |
264 | }; |
265 | ||
266 | ||
267 | /* | |
268 | * This structure holds at boot time configured netdevice settings. They | |
269 | * are then used in the device probing. | |
270 | */ | |
271 | struct netdev_boot_setup { | |
272 | char name[IFNAMSIZ]; | |
273 | struct ifmap map; | |
274 | }; | |
275 | #define NETDEV_BOOT_SETUP_MAX 8 | |
276 | ||
20380731 | 277 | extern int __init netdev_boot_setup(char *str); |
1da177e4 LT |
278 | |
279 | /* | |
280 | * The DEVICE structure. | |
281 | * Actually, this whole structure is a big mistake. It mixes I/O | |
282 | * data with strictly "high-level" data, and it has to know about | |
283 | * almost every data structure used in the INET module. | |
284 | * | |
285 | * FIXME: cleanup struct net_device such that network protocol info | |
286 | * moves out. | |
287 | */ | |
288 | ||
289 | struct net_device | |
290 | { | |
291 | ||
292 | /* | |
293 | * This is the first field of the "visible" part of this structure | |
294 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
295 | * the interface. | |
296 | */ | |
297 | char name[IFNAMSIZ]; | |
9356b8fc ED |
298 | /* device name hash chain */ |
299 | struct hlist_node name_hlist; | |
1da177e4 LT |
300 | |
301 | /* | |
302 | * I/O specific fields | |
303 | * FIXME: Merge these and struct ifmap into one | |
304 | */ | |
305 | unsigned long mem_end; /* shared mem end */ | |
306 | unsigned long mem_start; /* shared mem start */ | |
307 | unsigned long base_addr; /* device I/O address */ | |
308 | unsigned int irq; /* device IRQ number */ | |
309 | ||
310 | /* | |
311 | * Some hardware also needs these fields, but they are not | |
312 | * part of the usual set specified in Space.c. | |
313 | */ | |
314 | ||
315 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
316 | unsigned char dma; /* DMA channel */ | |
317 | ||
318 | unsigned long state; | |
319 | ||
7562f876 | 320 | struct list_head dev_list; |
1da177e4 LT |
321 | |
322 | /* The device initialization function. Called only once. */ | |
323 | int (*init)(struct net_device *dev); | |
324 | ||
325 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
326 | ||
9356b8fc ED |
327 | /* Net device features */ |
328 | unsigned long features; | |
329 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
d212f87b | 330 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
9356b8fc ED |
331 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
332 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
d212f87b | 333 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
9356b8fc ED |
334 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
335 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
336 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
337 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
338 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
339 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
37c3185a | 340 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
9356b8fc | 341 | #define NETIF_F_LLTX 4096 /* LockLess TX */ |
f25f4e44 | 342 | #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ |
7967168c HX |
343 | |
344 | /* Segmentation offload features */ | |
345 | #define NETIF_F_GSO_SHIFT 16 | |
bcd76111 | 346 | #define NETIF_F_GSO_MASK 0xffff0000 |
7967168c | 347 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
f83ef8c0 | 348 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
576a30eb | 349 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
f83ef8c0 HX |
350 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
351 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
9356b8fc | 352 | |
78eb8877 HX |
353 | /* List of features with software fallbacks. */ |
354 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
355 | ||
d212f87b | 356 | |
8648b305 | 357 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
d212f87b SH |
358 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
359 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
360 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
8648b305 | 361 | |
1da177e4 LT |
362 | struct net_device *next_sched; |
363 | ||
364 | /* Interface index. Unique device identifier */ | |
365 | int ifindex; | |
366 | int iflink; | |
367 | ||
368 | ||
369 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
c45d286e | 370 | struct net_device_stats stats; |
1da177e4 | 371 | |
b86e0280 | 372 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
373 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
374 | * See <net/iw_handler.h> for details. Jean II */ | |
375 | const struct iw_handler_def * wireless_handlers; | |
376 | /* Instance data managed by the core of Wireless Extensions. */ | |
377 | struct iw_public_data * wireless_data; | |
b86e0280 | 378 | #endif |
76fd8593 | 379 | const struct ethtool_ops *ethtool_ops; |
1da177e4 LT |
380 | |
381 | /* | |
382 | * This marks the end of the "visible" part of the structure. All | |
383 | * fields hereafter are internal to the system, and may change at | |
384 | * will (read: may be cleaned up at will). | |
385 | */ | |
386 | ||
1da177e4 | 387 | |
b00055aa | 388 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
389 | unsigned short gflags; |
390 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
391 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
392 | ||
b00055aa SR |
393 | unsigned char operstate; /* RFC2863 operstate */ |
394 | unsigned char link_mode; /* mapping policy to operstate */ | |
395 | ||
1da177e4 LT |
396 | unsigned mtu; /* interface MTU value */ |
397 | unsigned short type; /* interface hardware type */ | |
398 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 LT |
399 | |
400 | struct net_device *master; /* Pointer to master device of a group, | |
401 | * which this device is member of. | |
402 | */ | |
403 | ||
404 | /* Interface address info. */ | |
a6f9a705 | 405 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
406 | unsigned char addr_len; /* hardware address length */ |
407 | unsigned short dev_id; /* for shared network cards */ | |
408 | ||
4417da66 PM |
409 | struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ |
410 | int uc_count; /* Number of installed ucasts */ | |
411 | int uc_promisc; | |
3fba5a8b | 412 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ |
1da177e4 LT |
413 | int mc_count; /* Number of installed mcasts */ |
414 | int promiscuity; | |
415 | int allmulti; | |
416 | ||
1da177e4 LT |
417 | |
418 | /* Protocol specific pointers */ | |
419 | ||
420 | void *atalk_ptr; /* AppleTalk link */ | |
421 | void *ip_ptr; /* IPv4 specific data */ | |
422 | void *dn_ptr; /* DECnet specific data */ | |
423 | void *ip6_ptr; /* IPv6 specific data */ | |
424 | void *ec_ptr; /* Econet specific data */ | |
425 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
426 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
427 | assign before registering */ | |
1da177e4 | 428 | |
9356b8fc ED |
429 | /* |
430 | * Cache line mostly used on receive path (including eth_type_trans()) | |
431 | */ | |
432 | struct list_head poll_list ____cacheline_aligned_in_smp; | |
433 | /* Link to poll list */ | |
434 | ||
435 | int (*poll) (struct net_device *dev, int *quota); | |
1da177e4 LT |
436 | int quota; |
437 | int weight; | |
9356b8fc ED |
438 | unsigned long last_rx; /* Time of last Rx */ |
439 | /* Interface address info used in eth_type_trans() */ | |
440 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
441 | because most packets are unicast) */ | |
442 | ||
443 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 444 | |
9356b8fc ED |
445 | /* |
446 | * Cache line mostly used on queue transmit path (qdisc) | |
447 | */ | |
448 | /* device queue lock */ | |
449 | spinlock_t queue_lock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
450 | struct Qdisc *qdisc; |
451 | struct Qdisc *qdisc_sleeping; | |
1da177e4 LT |
452 | struct list_head qdisc_list; |
453 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
454 | ||
f6a78bfc HX |
455 | /* Partially transmitted GSO packet. */ |
456 | struct sk_buff *gso_skb; | |
457 | ||
1da177e4 LT |
458 | /* ingress path synchronizer */ |
459 | spinlock_t ingress_lock; | |
9356b8fc ED |
460 | struct Qdisc *qdisc_ingress; |
461 | ||
462 | /* | |
463 | * One part is mostly used on xmit path (device) | |
464 | */ | |
1da177e4 | 465 | /* hard_start_xmit synchronizer */ |
932ff279 | 466 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
1da177e4 LT |
467 | /* cpu id of processor entered to hard_start_xmit or -1, |
468 | if nobody entered there. | |
469 | */ | |
470 | int xmit_lock_owner; | |
9356b8fc ED |
471 | void *priv; /* pointer to private data */ |
472 | int (*hard_start_xmit) (struct sk_buff *skb, | |
473 | struct net_device *dev); | |
474 | /* These may be needed for future network-power-down code. */ | |
475 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
476 | ||
477 | int watchdog_timeo; /* used by dev_watchdog() */ | |
478 | struct timer_list watchdog_timer; | |
479 | ||
480 | /* | |
481 | * refcnt is a very hot point, so align it on SMP | |
482 | */ | |
1da177e4 | 483 | /* Number of references to this device */ |
9356b8fc ED |
484 | atomic_t refcnt ____cacheline_aligned_in_smp; |
485 | ||
1da177e4 LT |
486 | /* delayed register/unregister */ |
487 | struct list_head todo_list; | |
1da177e4 LT |
488 | /* device index hash chain */ |
489 | struct hlist_node index_hlist; | |
490 | ||
572a103d HX |
491 | struct net_device *link_watch_next; |
492 | ||
1da177e4 LT |
493 | /* register/unregister state machine */ |
494 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 495 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
496 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
497 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
498 | NETREG_RELEASED, /* called free_netdev */ | |
499 | } reg_state; | |
500 | ||
1da177e4 LT |
501 | /* Called after device is detached from network. */ |
502 | void (*uninit)(struct net_device *dev); | |
503 | /* Called after last user reference disappears. */ | |
504 | void (*destructor)(struct net_device *dev); | |
505 | ||
506 | /* Pointers to interface service routines. */ | |
507 | int (*open)(struct net_device *dev); | |
508 | int (*stop)(struct net_device *dev); | |
1da177e4 | 509 | #define HAVE_NETDEV_POLL |
1da177e4 LT |
510 | int (*hard_header) (struct sk_buff *skb, |
511 | struct net_device *dev, | |
512 | unsigned short type, | |
513 | void *daddr, | |
514 | void *saddr, | |
515 | unsigned len); | |
516 | int (*rebuild_header)(struct sk_buff *skb); | |
4417da66 PM |
517 | #define HAVE_SET_RX_MODE |
518 | void (*set_rx_mode)(struct net_device *dev); | |
1da177e4 LT |
519 | #define HAVE_MULTICAST |
520 | void (*set_multicast_list)(struct net_device *dev); | |
521 | #define HAVE_SET_MAC_ADDR | |
522 | int (*set_mac_address)(struct net_device *dev, | |
523 | void *addr); | |
524 | #define HAVE_PRIVATE_IOCTL | |
525 | int (*do_ioctl)(struct net_device *dev, | |
526 | struct ifreq *ifr, int cmd); | |
527 | #define HAVE_SET_CONFIG | |
528 | int (*set_config)(struct net_device *dev, | |
529 | struct ifmap *map); | |
530 | #define HAVE_HEADER_CACHE | |
531 | int (*hard_header_cache)(struct neighbour *neigh, | |
532 | struct hh_cache *hh); | |
533 | void (*header_cache_update)(struct hh_cache *hh, | |
534 | struct net_device *dev, | |
535 | unsigned char * haddr); | |
536 | #define HAVE_CHANGE_MTU | |
537 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
538 | ||
539 | #define HAVE_TX_TIMEOUT | |
540 | void (*tx_timeout) (struct net_device *dev); | |
541 | ||
542 | void (*vlan_rx_register)(struct net_device *dev, | |
543 | struct vlan_group *grp); | |
544 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
545 | unsigned short vid); | |
546 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
547 | unsigned short vid); | |
548 | ||
549 | int (*hard_header_parse)(struct sk_buff *skb, | |
550 | unsigned char *haddr); | |
551 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
552 | #ifdef CONFIG_NETPOLL | |
115c1d6e | 553 | struct netpoll_info *npinfo; |
1da177e4 LT |
554 | #endif |
555 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
556 | void (*poll_controller)(struct net_device *dev); | |
557 | #endif | |
558 | ||
559 | /* bridge stuff */ | |
560 | struct net_bridge_port *br_port; | |
561 | ||
1da177e4 | 562 | /* class/net/name entry */ |
43cb76d9 | 563 | struct device dev; |
fe9925b5 SH |
564 | /* space for optional statistics and wireless sysfs groups */ |
565 | struct attribute_group *sysfs_groups[3]; | |
38f7b870 PM |
566 | |
567 | /* rtnetlink link ops */ | |
568 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 PWJ |
569 | |
570 | /* The TX queue control structures */ | |
571 | unsigned int egress_subqueue_count; | |
572 | struct net_device_subqueue egress_subqueue[0]; | |
1da177e4 | 573 | }; |
43cb76d9 | 574 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
575 | |
576 | #define NETDEV_ALIGN 32 | |
577 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
578 | ||
6472ce60 | 579 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 580 | { |
f25f4e44 | 581 | return dev->priv; |
1da177e4 LT |
582 | } |
583 | ||
584 | #define SET_MODULE_OWNER(dev) do { } while (0) | |
585 | /* Set the sysfs physical device reference for the network logical device | |
586 | * if set prior to registration will cause a symlink during initialization. | |
587 | */ | |
43cb76d9 | 588 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 LT |
589 | |
590 | struct packet_type { | |
f2ccd8fa DM |
591 | __be16 type; /* This is really htons(ether_type). */ |
592 | struct net_device *dev; /* NULL is wildcarded here */ | |
593 | int (*func) (struct sk_buff *, | |
594 | struct net_device *, | |
595 | struct packet_type *, | |
596 | struct net_device *); | |
576a30eb HX |
597 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
598 | int features); | |
a430a43d | 599 | int (*gso_send_check)(struct sk_buff *skb); |
1da177e4 LT |
600 | void *af_packet_priv; |
601 | struct list_head list; | |
602 | }; | |
603 | ||
604 | #include <linux/interrupt.h> | |
605 | #include <linux/notifier.h> | |
606 | ||
607 | extern struct net_device loopback_dev; /* The loopback */ | |
7562f876 | 608 | extern struct list_head dev_base_head; /* All devices */ |
1da177e4 LT |
609 | extern rwlock_t dev_base_lock; /* Device list lock */ |
610 | ||
7562f876 PE |
611 | #define for_each_netdev(d) \ |
612 | list_for_each_entry(d, &dev_base_head, dev_list) | |
613 | #define for_each_netdev_safe(d, n) \ | |
614 | list_for_each_entry_safe(d, n, &dev_base_head, dev_list) | |
615 | #define for_each_netdev_continue(d) \ | |
616 | list_for_each_entry_continue(d, &dev_base_head, dev_list) | |
617 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
618 | ||
619 | static inline struct net_device *next_net_device(struct net_device *dev) | |
620 | { | |
621 | struct list_head *lh; | |
622 | ||
623 | lh = dev->dev_list.next; | |
624 | return lh == &dev_base_head ? NULL : net_device_entry(lh); | |
625 | } | |
626 | ||
627 | static inline struct net_device *first_net_device(void) | |
628 | { | |
629 | return list_empty(&dev_base_head) ? NULL : | |
630 | net_device_entry(dev_base_head.next); | |
631 | } | |
632 | ||
1da177e4 LT |
633 | extern int netdev_boot_setup_check(struct net_device *dev); |
634 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
635 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); | |
636 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); | |
4e9cac2b | 637 | extern struct net_device *__dev_getfirstbyhwtype(unsigned short type); |
1da177e4 LT |
638 | extern void dev_add_pack(struct packet_type *pt); |
639 | extern void dev_remove_pack(struct packet_type *pt); | |
640 | extern void __dev_remove_pack(struct packet_type *pt); | |
641 | ||
642 | extern struct net_device *dev_get_by_flags(unsigned short flags, | |
643 | unsigned short mask); | |
644 | extern struct net_device *dev_get_by_name(const char *name); | |
645 | extern struct net_device *__dev_get_by_name(const char *name); | |
646 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
647 | extern int dev_open(struct net_device *dev); | |
648 | extern int dev_close(struct net_device *dev); | |
649 | extern int dev_queue_xmit(struct sk_buff *skb); | |
650 | extern int register_netdevice(struct net_device *dev); | |
22f8cde5 | 651 | extern void unregister_netdevice(struct net_device *dev); |
1da177e4 LT |
652 | extern void free_netdev(struct net_device *dev); |
653 | extern void synchronize_net(void); | |
654 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
655 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
656 | extern int call_netdevice_notifiers(unsigned long val, void *v); | |
657 | extern struct net_device *dev_get_by_index(int ifindex); | |
658 | extern struct net_device *__dev_get_by_index(int ifindex); | |
659 | extern int dev_restart(struct net_device *dev); | |
660 | #ifdef CONFIG_NETPOLL_TRAP | |
661 | extern int netpoll_trap(void); | |
662 | #endif | |
663 | ||
664 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
665 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
666 | static inline int unregister_gifconf(unsigned int family) | |
667 | { | |
668 | return register_gifconf(family, NULL); | |
669 | } | |
670 | ||
671 | /* | |
672 | * Incoming packets are placed on per-cpu queues so that | |
673 | * no locking is needed. | |
674 | */ | |
675 | ||
676 | struct softnet_data | |
677 | { | |
31aa02c5 | 678 | struct net_device *output_queue; |
1da177e4 LT |
679 | struct sk_buff_head input_pkt_queue; |
680 | struct list_head poll_list; | |
1da177e4 LT |
681 | struct sk_buff *completion_queue; |
682 | ||
683 | struct net_device backlog_dev; /* Sorry. 8) */ | |
db217334 CL |
684 | #ifdef CONFIG_NET_DMA |
685 | struct dma_chan *net_dma; | |
686 | #endif | |
1da177e4 LT |
687 | }; |
688 | ||
689 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
690 | ||
691 | #define HAVE_NETIF_QUEUE | |
692 | ||
56079431 | 693 | extern void __netif_schedule(struct net_device *dev); |
1da177e4 LT |
694 | |
695 | static inline void netif_schedule(struct net_device *dev) | |
696 | { | |
697 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) | |
698 | __netif_schedule(dev); | |
699 | } | |
700 | ||
701 | static inline void netif_start_queue(struct net_device *dev) | |
702 | { | |
703 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
704 | } | |
705 | ||
706 | static inline void netif_wake_queue(struct net_device *dev) | |
707 | { | |
708 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 SS |
709 | if (netpoll_trap()) { |
710 | clear_bit(__LINK_STATE_XOFF, &dev->state); | |
1da177e4 | 711 | return; |
5f286e11 | 712 | } |
1da177e4 LT |
713 | #endif |
714 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) | |
715 | __netif_schedule(dev); | |
716 | } | |
717 | ||
718 | static inline void netif_stop_queue(struct net_device *dev) | |
719 | { | |
1da177e4 LT |
720 | set_bit(__LINK_STATE_XOFF, &dev->state); |
721 | } | |
722 | ||
723 | static inline int netif_queue_stopped(const struct net_device *dev) | |
724 | { | |
725 | return test_bit(__LINK_STATE_XOFF, &dev->state); | |
726 | } | |
727 | ||
728 | static inline int netif_running(const struct net_device *dev) | |
729 | { | |
730 | return test_bit(__LINK_STATE_START, &dev->state); | |
731 | } | |
732 | ||
f25f4e44 PWJ |
733 | /* |
734 | * Routines to manage the subqueues on a device. We only need start | |
735 | * stop, and a check if it's stopped. All other device management is | |
736 | * done at the overall netdevice level. | |
737 | * Also test the device if we're multiqueue. | |
738 | */ | |
739 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) | |
740 | { | |
741 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
742 | clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); | |
743 | #endif | |
744 | } | |
745 | ||
746 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) | |
747 | { | |
748 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
749 | #ifdef CONFIG_NETPOLL_TRAP | |
750 | if (netpoll_trap()) | |
751 | return; | |
752 | #endif | |
753 | set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); | |
754 | #endif | |
755 | } | |
756 | ||
757 | static inline int netif_subqueue_stopped(const struct net_device *dev, | |
758 | u16 queue_index) | |
759 | { | |
760 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
761 | return test_bit(__LINK_STATE_XOFF, | |
762 | &dev->egress_subqueue[queue_index].state); | |
763 | #else | |
764 | return 0; | |
765 | #endif | |
766 | } | |
767 | ||
768 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
769 | { | |
770 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
771 | #ifdef CONFIG_NETPOLL_TRAP | |
772 | if (netpoll_trap()) | |
773 | return; | |
774 | #endif | |
775 | if (test_and_clear_bit(__LINK_STATE_XOFF, | |
776 | &dev->egress_subqueue[queue_index].state)) | |
777 | __netif_schedule(dev); | |
778 | #endif | |
779 | } | |
780 | ||
781 | static inline int netif_is_multiqueue(const struct net_device *dev) | |
782 | { | |
783 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE | |
784 | return (!!(NETIF_F_MULTI_QUEUE & dev->features)); | |
785 | #else | |
786 | return 0; | |
787 | #endif | |
788 | } | |
1da177e4 LT |
789 | |
790 | /* Use this variant when it is known for sure that it | |
791 | * is executing from interrupt context. | |
792 | */ | |
793 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) | |
794 | { | |
795 | if (atomic_dec_and_test(&skb->users)) { | |
796 | struct softnet_data *sd; | |
797 | unsigned long flags; | |
798 | ||
799 | local_irq_save(flags); | |
800 | sd = &__get_cpu_var(softnet_data); | |
801 | skb->next = sd->completion_queue; | |
802 | sd->completion_queue = skb; | |
803 | raise_softirq_irqoff(NET_TX_SOFTIRQ); | |
804 | local_irq_restore(flags); | |
805 | } | |
806 | } | |
807 | ||
808 | /* Use this variant in places where it could be invoked | |
809 | * either from interrupt or non-interrupt context. | |
810 | */ | |
56079431 | 811 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
812 | |
813 | #define HAVE_NETIF_RX 1 | |
814 | extern int netif_rx(struct sk_buff *skb); | |
815 | extern int netif_rx_ni(struct sk_buff *skb); | |
816 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
817 | extern int netif_receive_skb(struct sk_buff *skb); | |
c2373ee9 | 818 | extern int dev_valid_name(const char *name); |
1da177e4 LT |
819 | extern int dev_ioctl(unsigned int cmd, void __user *); |
820 | extern int dev_ethtool(struct ifreq *); | |
821 | extern unsigned dev_get_flags(const struct net_device *); | |
822 | extern int dev_change_flags(struct net_device *, unsigned); | |
823 | extern int dev_change_name(struct net_device *, char *); | |
824 | extern int dev_set_mtu(struct net_device *, int); | |
825 | extern int dev_set_mac_address(struct net_device *, | |
826 | struct sockaddr *); | |
f6a78bfc HX |
827 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
828 | struct net_device *dev); | |
1da177e4 LT |
829 | |
830 | extern void dev_init(void); | |
831 | ||
20380731 | 832 | extern int netdev_budget; |
1da177e4 LT |
833 | |
834 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
835 | extern void netdev_run_todo(void); | |
836 | ||
837 | static inline void dev_put(struct net_device *dev) | |
838 | { | |
839 | atomic_dec(&dev->refcnt); | |
840 | } | |
841 | ||
15333061 SH |
842 | static inline void dev_hold(struct net_device *dev) |
843 | { | |
844 | atomic_inc(&dev->refcnt); | |
845 | } | |
1da177e4 LT |
846 | |
847 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
848 | * and _off may be called from IRQ context, but it is caller | |
849 | * who is responsible for serialization of these calls. | |
b00055aa SR |
850 | * |
851 | * The name carrier is inappropriate, these functions should really be | |
852 | * called netif_lowerlayer_*() because they represent the state of any | |
853 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
854 | */ |
855 | ||
856 | extern void linkwatch_fire_event(struct net_device *dev); | |
857 | ||
858 | static inline int netif_carrier_ok(const struct net_device *dev) | |
859 | { | |
860 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
861 | } | |
862 | ||
863 | extern void __netdev_watchdog_up(struct net_device *dev); | |
864 | ||
0a242efc | 865 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 866 | |
0a242efc | 867 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 868 | |
b00055aa SR |
869 | static inline void netif_dormant_on(struct net_device *dev) |
870 | { | |
871 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
872 | linkwatch_fire_event(dev); | |
873 | } | |
874 | ||
875 | static inline void netif_dormant_off(struct net_device *dev) | |
876 | { | |
877 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
878 | linkwatch_fire_event(dev); | |
879 | } | |
880 | ||
881 | static inline int netif_dormant(const struct net_device *dev) | |
882 | { | |
883 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
884 | } | |
885 | ||
886 | ||
887 | static inline int netif_oper_up(const struct net_device *dev) { | |
888 | return (dev->operstate == IF_OPER_UP || | |
889 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
890 | } | |
891 | ||
1da177e4 LT |
892 | /* Hot-plugging. */ |
893 | static inline int netif_device_present(struct net_device *dev) | |
894 | { | |
895 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
896 | } | |
897 | ||
56079431 | 898 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 899 | |
56079431 | 900 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
901 | |
902 | /* | |
903 | * Network interface message level settings | |
904 | */ | |
905 | #define HAVE_NETIF_MSG 1 | |
906 | ||
907 | enum { | |
908 | NETIF_MSG_DRV = 0x0001, | |
909 | NETIF_MSG_PROBE = 0x0002, | |
910 | NETIF_MSG_LINK = 0x0004, | |
911 | NETIF_MSG_TIMER = 0x0008, | |
912 | NETIF_MSG_IFDOWN = 0x0010, | |
913 | NETIF_MSG_IFUP = 0x0020, | |
914 | NETIF_MSG_RX_ERR = 0x0040, | |
915 | NETIF_MSG_TX_ERR = 0x0080, | |
916 | NETIF_MSG_TX_QUEUED = 0x0100, | |
917 | NETIF_MSG_INTR = 0x0200, | |
918 | NETIF_MSG_TX_DONE = 0x0400, | |
919 | NETIF_MSG_RX_STATUS = 0x0800, | |
920 | NETIF_MSG_PKTDATA = 0x1000, | |
921 | NETIF_MSG_HW = 0x2000, | |
922 | NETIF_MSG_WOL = 0x4000, | |
923 | }; | |
924 | ||
925 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
926 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
927 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
928 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
929 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
930 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
931 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
932 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
933 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
934 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
935 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
936 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
937 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
938 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
939 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
940 | ||
941 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
942 | { | |
943 | /* use default */ | |
944 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
945 | return default_msg_enable_bits; | |
946 | if (debug_value == 0) /* no output */ | |
947 | return 0; | |
948 | /* set low N bits */ | |
949 | return (1 << debug_value) - 1; | |
950 | } | |
951 | ||
0a122576 SH |
952 | /* Test if receive needs to be scheduled */ |
953 | static inline int __netif_rx_schedule_prep(struct net_device *dev) | |
793b883e SH |
954 | { |
955 | return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
956 | } | |
1da177e4 | 957 | |
0a122576 | 958 | /* Test if receive needs to be scheduled but only if up */ |
1da177e4 LT |
959 | static inline int netif_rx_schedule_prep(struct net_device *dev) |
960 | { | |
0a122576 | 961 | return netif_running(dev) && __netif_rx_schedule_prep(dev); |
1da177e4 LT |
962 | } |
963 | ||
964 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
965 | * already been called and returned 1. | |
966 | */ | |
967 | ||
56079431 | 968 | extern void __netif_rx_schedule(struct net_device *dev); |
1da177e4 LT |
969 | |
970 | /* Try to reschedule poll. Called by irq handler. */ | |
971 | ||
972 | static inline void netif_rx_schedule(struct net_device *dev) | |
973 | { | |
974 | if (netif_rx_schedule_prep(dev)) | |
975 | __netif_rx_schedule(dev); | |
976 | } | |
977 | ||
d3240312 SH |
978 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). |
979 | * Do not inline this? | |
980 | */ | |
1da177e4 LT |
981 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) |
982 | { | |
983 | if (netif_rx_schedule_prep(dev)) { | |
984 | unsigned long flags; | |
d3240312 SH |
985 | |
986 | dev->quota += undo; | |
987 | ||
1da177e4 | 988 | local_irq_save(flags); |
d3240312 SH |
989 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); |
990 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); | |
1da177e4 LT |
991 | local_irq_restore(flags); |
992 | return 1; | |
993 | } | |
994 | return 0; | |
995 | } | |
996 | ||
b0ba6667 HX |
997 | /* same as netif_rx_complete, except that local_irq_save(flags) |
998 | * has already been issued | |
999 | */ | |
1000 | static inline void __netif_rx_complete(struct net_device *dev) | |
1001 | { | |
1002 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); | |
1003 | list_del(&dev->poll_list); | |
1004 | smp_mb__before_clear_bit(); | |
1005 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); | |
1006 | } | |
1007 | ||
1da177e4 LT |
1008 | /* Remove interface from poll list: it must be in the poll list |
1009 | * on current cpu. This primitive is called by dev->poll(), when | |
1010 | * it completes the work. The device cannot be out of poll list at this | |
1011 | * moment, it is BUG(). | |
1012 | */ | |
1013 | static inline void netif_rx_complete(struct net_device *dev) | |
1014 | { | |
1015 | unsigned long flags; | |
1016 | ||
1017 | local_irq_save(flags); | |
b0ba6667 | 1018 | __netif_rx_complete(dev); |
1da177e4 LT |
1019 | local_irq_restore(flags); |
1020 | } | |
1021 | ||
1022 | static inline void netif_poll_disable(struct net_device *dev) | |
1023 | { | |
3173c890 | 1024 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) |
1da177e4 | 1025 | /* No hurry. */ |
3173c890 | 1026 | schedule_timeout_interruptible(1); |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | static inline void netif_poll_enable(struct net_device *dev) | |
1030 | { | |
e44c39bd | 1031 | smp_mb__before_clear_bit(); |
1da177e4 | 1032 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
1da177e4 LT |
1033 | } |
1034 | ||
932ff279 HX |
1035 | static inline void netif_tx_lock(struct net_device *dev) |
1036 | { | |
1037 | spin_lock(&dev->_xmit_lock); | |
1038 | dev->xmit_lock_owner = smp_processor_id(); | |
1039 | } | |
1040 | ||
1041 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1042 | { | |
1043 | spin_lock_bh(&dev->_xmit_lock); | |
1044 | dev->xmit_lock_owner = smp_processor_id(); | |
1045 | } | |
1046 | ||
1047 | static inline int netif_tx_trylock(struct net_device *dev) | |
1048 | { | |
53c4b2cc HX |
1049 | int ok = spin_trylock(&dev->_xmit_lock); |
1050 | if (likely(ok)) | |
932ff279 | 1051 | dev->xmit_lock_owner = smp_processor_id(); |
53c4b2cc | 1052 | return ok; |
932ff279 HX |
1053 | } |
1054 | ||
1055 | static inline void netif_tx_unlock(struct net_device *dev) | |
1056 | { | |
1057 | dev->xmit_lock_owner = -1; | |
1058 | spin_unlock(&dev->_xmit_lock); | |
1059 | } | |
1060 | ||
1061 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1062 | { | |
1063 | dev->xmit_lock_owner = -1; | |
1064 | spin_unlock_bh(&dev->_xmit_lock); | |
1065 | } | |
1066 | ||
1da177e4 LT |
1067 | static inline void netif_tx_disable(struct net_device *dev) |
1068 | { | |
932ff279 | 1069 | netif_tx_lock_bh(dev); |
1da177e4 | 1070 | netif_stop_queue(dev); |
932ff279 | 1071 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
1075 | ||
1076 | extern void ether_setup(struct net_device *dev); | |
1077 | ||
1078 | /* Support for loadable net-drivers */ | |
f25f4e44 PWJ |
1079 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
1080 | void (*setup)(struct net_device *), | |
1081 | unsigned int queue_count); | |
1082 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1083 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1da177e4 LT |
1084 | extern int register_netdev(struct net_device *dev); |
1085 | extern void unregister_netdev(struct net_device *dev); | |
4417da66 PM |
1086 | /* Functions used for secondary unicast and multicast support */ |
1087 | extern void dev_set_rx_mode(struct net_device *dev); | |
1088 | extern void __dev_set_rx_mode(struct net_device *dev); | |
1089 | extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); | |
1090 | extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); | |
1da177e4 LT |
1091 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); |
1092 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
1093 | extern void dev_mc_discard(struct net_device *dev); | |
bf742482 PM |
1094 | extern int __dev_addr_delete(struct dev_addr_list **list, void *addr, int alen, int all); |
1095 | extern int __dev_addr_add(struct dev_addr_list **list, void *addr, int alen, int newonly); | |
1096 | extern void __dev_addr_discard(struct dev_addr_list **list); | |
1da177e4 LT |
1097 | extern void dev_set_promiscuity(struct net_device *dev, int inc); |
1098 | extern void dev_set_allmulti(struct net_device *dev, int inc); | |
1099 | extern void netdev_state_change(struct net_device *dev); | |
d8a33ac4 | 1100 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 LT |
1101 | /* Load a device via the kmod */ |
1102 | extern void dev_load(const char *name); | |
1103 | extern void dev_mcast_init(void); | |
1104 | extern int netdev_max_backlog; | |
1105 | extern int weight_p; | |
1106 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
84fa7933 | 1107 | extern int skb_checksum_help(struct sk_buff *skb); |
576a30eb | 1108 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
fb286bb2 HX |
1109 | #ifdef CONFIG_BUG |
1110 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
1111 | #else | |
1112 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
1113 | { | |
1114 | } | |
1115 | #endif | |
1da177e4 LT |
1116 | /* rx skb timestamps */ |
1117 | extern void net_enable_timestamp(void); | |
1118 | extern void net_disable_timestamp(void); | |
1119 | ||
20380731 ACM |
1120 | #ifdef CONFIG_PROC_FS |
1121 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
1122 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
1123 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
1124 | #endif | |
1125 | ||
1126 | extern void linkwatch_run_queue(void); | |
1127 | ||
bcd76111 | 1128 | static inline int net_gso_ok(int features, int gso_type) |
576a30eb | 1129 | { |
bcd76111 | 1130 | int feature = gso_type << NETIF_F_GSO_SHIFT; |
d6b4991a | 1131 | return (features & feature) == feature; |
576a30eb HX |
1132 | } |
1133 | ||
bcd76111 HX |
1134 | static inline int skb_gso_ok(struct sk_buff *skb, int features) |
1135 | { | |
a430a43d | 1136 | return net_gso_ok(features, skb_shinfo(skb)->gso_type); |
bcd76111 HX |
1137 | } |
1138 | ||
7967168c HX |
1139 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
1140 | { | |
a430a43d HX |
1141 | return skb_is_gso(skb) && |
1142 | (!skb_gso_ok(skb, dev->features) || | |
84fa7933 | 1143 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
7967168c HX |
1144 | } |
1145 | ||
7ea49ed7 | 1146 | /* On bonding slaves other than the currently active slave, suppress |
f5b2b966 JV |
1147 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and |
1148 | * ARP on active-backup slaves with arp_validate enabled. | |
7ea49ed7 DM |
1149 | */ |
1150 | static inline int skb_bond_should_drop(struct sk_buff *skb) | |
1151 | { | |
1152 | struct net_device *dev = skb->dev; | |
1153 | struct net_device *master = dev->master; | |
1154 | ||
1155 | if (master && | |
1156 | (dev->priv_flags & IFF_SLAVE_INACTIVE)) { | |
f5b2b966 JV |
1157 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && |
1158 | skb->protocol == __constant_htons(ETH_P_ARP)) | |
1159 | return 0; | |
1160 | ||
7ea49ed7 DM |
1161 | if (master->priv_flags & IFF_MASTER_ALB) { |
1162 | if (skb->pkt_type != PACKET_BROADCAST && | |
1163 | skb->pkt_type != PACKET_MULTICAST) | |
1164 | return 0; | |
1165 | } | |
1166 | if (master->priv_flags & IFF_MASTER_8023AD && | |
1167 | skb->protocol == __constant_htons(ETH_P_SLOW)) | |
1168 | return 0; | |
1169 | ||
1170 | return 1; | |
1171 | } | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1da177e4 LT |
1175 | #endif /* __KERNEL__ */ |
1176 | ||
1177 | #endif /* _LINUX_DEV_H */ |