Commit | Line | Data |
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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> | |
113aa838 | 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
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 | ||
d7fe0f24 | 28 | #include <linux/timer.h> |
187f1882 | 29 | #include <linux/bug.h> |
bea3348e | 30 | #include <linux/delay.h> |
60063497 | 31 | #include <linux/atomic.h> |
53511453 | 32 | #include <linux/prefetch.h> |
1da177e4 LT |
33 | #include <asm/cache.h> |
34 | #include <asm/byteorder.h> | |
35 | ||
1da177e4 | 36 | #include <linux/percpu.h> |
4d5b78c0 | 37 | #include <linux/rculist.h> |
bea3348e | 38 | #include <linux/workqueue.h> |
114cf580 | 39 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 40 | |
b1b67dd4 | 41 | #include <linux/ethtool.h> |
a050c33f | 42 | #include <net/net_namespace.h> |
7a6b6f51 | 43 | #ifdef CONFIG_DCB |
2f90b865 AD |
44 | #include <net/dcbnl.h> |
45 | #endif | |
5bc1421e | 46 | #include <net/netprio_cgroup.h> |
e817f856 | 47 | #include <net/xdp.h> |
a050c33f | 48 | |
a59e2ecb | 49 | #include <linux/netdev_features.h> |
77162022 | 50 | #include <linux/neighbour.h> |
607ca46e | 51 | #include <uapi/linux/netdevice.h> |
61bd3857 | 52 | #include <uapi/linux/if_bonding.h> |
e4c6734e | 53 | #include <uapi/linux/pkt_cls.h> |
59cc1f61 | 54 | #include <linux/hashtable.h> |
a59e2ecb | 55 | |
115c1d6e | 56 | struct netpoll_info; |
313162d0 | 57 | struct device; |
c1f19b51 | 58 | struct phy_device; |
2f657a60 | 59 | struct dsa_port; |
c6e970a0 | 60 | |
e679c9c1 | 61 | struct sfp_bus; |
704232c2 JB |
62 | /* 802.11 specific */ |
63 | struct wireless_dev; | |
98a18b6f AA |
64 | /* 802.15.4 specific */ |
65 | struct wpan_dev; | |
03c57747 | 66 | struct mpls_dev; |
7c46a640 AD |
67 | /* UDP Tunnel offloads */ |
68 | struct udp_tunnel_info; | |
a7862b45 | 69 | struct bpf_prog; |
814abfab | 70 | struct xdp_buff; |
1da177e4 | 71 | |
f629d208 JP |
72 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
73 | const struct ethtool_ops *ops); | |
d07d7507 | 74 | |
9a1654ba JP |
75 | /* Backlog congestion levels */ |
76 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
77 | #define NET_RX_DROP 1 /* packet dropped */ | |
78 | ||
572a9d7b PM |
79 | /* |
80 | * Transmit return codes: transmit return codes originate from three different | |
81 | * namespaces: | |
82 | * | |
83 | * - qdisc return codes | |
84 | * - driver transmit return codes | |
85 | * - errno values | |
86 | * | |
87 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
88 | * function. Real network devices commonly used with qdiscs should only return | |
89 | * the driver transmit return codes though - when qdiscs are used, the actual | |
90 | * transmission happens asynchronously, so the value is not propagated to | |
5e82b4b2 BH |
91 | * higher layers. Virtual network devices transmit synchronously; in this case |
92 | * the driver transmit return codes are consumed by dev_queue_xmit(), and all | |
572a9d7b PM |
93 | * others are propagated to higher layers. |
94 | */ | |
95 | ||
96 | /* qdisc ->enqueue() return codes. */ | |
97 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
98 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
99 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
9a1654ba | 100 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
1da177e4 | 101 | |
b9df3cb8 GR |
102 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
103 | * indicates that the device will soon be dropping packets, or already drops | |
104 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 105 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
106 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
107 | ||
dc1f8bf6 | 108 | /* Driver transmit return codes */ |
9a1654ba | 109 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 110 | |
dc1f8bf6 | 111 | enum netdev_tx { |
572a9d7b | 112 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
113 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
114 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
dc1f8bf6 SH |
115 | }; |
116 | typedef enum netdev_tx netdev_tx_t; | |
117 | ||
9a1654ba JP |
118 | /* |
119 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
120 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
121 | */ | |
122 | static inline bool dev_xmit_complete(int rc) | |
123 | { | |
124 | /* | |
125 | * Positive cases with an skb consumed by a driver: | |
126 | * - successful transmission (rc == NETDEV_TX_OK) | |
127 | * - error while transmitting (rc < 0) | |
128 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
129 | */ | |
130 | if (likely(rc < NET_XMIT_MASK)) | |
131 | return true; | |
132 | ||
133 | return false; | |
134 | } | |
135 | ||
1da177e4 | 136 | /* |
5e82b4b2 | 137 | * Compute the worst-case header length according to the protocols |
1da177e4 LT |
138 | * used. |
139 | */ | |
fe2918b0 | 140 | |
c0eb4540 KS |
141 | #if defined(CONFIG_HYPERV_NET) |
142 | # define LL_MAX_HEADER 128 | |
143 | #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) | |
8388e3da DM |
144 | # if defined(CONFIG_MAC80211_MESH) |
145 | # define LL_MAX_HEADER 128 | |
146 | # else | |
147 | # define LL_MAX_HEADER 96 | |
148 | # endif | |
1da177e4 | 149 | #else |
8388e3da | 150 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
151 | #endif |
152 | ||
d11ead75 BH |
153 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
154 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
155 | #define MAX_HEADER LL_MAX_HEADER |
156 | #else | |
157 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
158 | #endif | |
159 | ||
160 | /* | |
be1f3c2c BH |
161 | * Old network device statistics. Fields are native words |
162 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 163 | */ |
fe2918b0 | 164 | |
d94d9fee | 165 | struct net_device_stats { |
3cfde79c BH |
166 | unsigned long rx_packets; |
167 | unsigned long tx_packets; | |
168 | unsigned long rx_bytes; | |
169 | unsigned long tx_bytes; | |
170 | unsigned long rx_errors; | |
171 | unsigned long tx_errors; | |
172 | unsigned long rx_dropped; | |
173 | unsigned long tx_dropped; | |
174 | unsigned long multicast; | |
1da177e4 | 175 | unsigned long collisions; |
1da177e4 | 176 | unsigned long rx_length_errors; |
3cfde79c BH |
177 | unsigned long rx_over_errors; |
178 | unsigned long rx_crc_errors; | |
179 | unsigned long rx_frame_errors; | |
180 | unsigned long rx_fifo_errors; | |
181 | unsigned long rx_missed_errors; | |
1da177e4 LT |
182 | unsigned long tx_aborted_errors; |
183 | unsigned long tx_carrier_errors; | |
184 | unsigned long tx_fifo_errors; | |
185 | unsigned long tx_heartbeat_errors; | |
186 | unsigned long tx_window_errors; | |
1da177e4 LT |
187 | unsigned long rx_compressed; |
188 | unsigned long tx_compressed; | |
189 | }; | |
190 | ||
1da177e4 LT |
191 | |
192 | #include <linux/cache.h> | |
193 | #include <linux/skbuff.h> | |
194 | ||
adc9300e | 195 | #ifdef CONFIG_RPS |
c5905afb IM |
196 | #include <linux/static_key.h> |
197 | extern struct static_key rps_needed; | |
13bfff25 | 198 | extern struct static_key rfs_needed; |
adc9300e ED |
199 | #endif |
200 | ||
1da177e4 LT |
201 | struct neighbour; |
202 | struct neigh_parms; | |
203 | struct sk_buff; | |
204 | ||
f001fde5 JP |
205 | struct netdev_hw_addr { |
206 | struct list_head list; | |
207 | unsigned char addr[MAX_ADDR_LEN]; | |
208 | unsigned char type; | |
ccffad25 JP |
209 | #define NETDEV_HW_ADDR_T_LAN 1 |
210 | #define NETDEV_HW_ADDR_T_SAN 2 | |
211 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
212 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 213 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 214 | bool global_use; |
4cd729b0 | 215 | int sync_cnt; |
8f8f103d | 216 | int refcount; |
4543fbef | 217 | int synced; |
f001fde5 JP |
218 | struct rcu_head rcu_head; |
219 | }; | |
220 | ||
31278e71 JP |
221 | struct netdev_hw_addr_list { |
222 | struct list_head list; | |
223 | int count; | |
224 | }; | |
225 | ||
22bedad3 JP |
226 | #define netdev_hw_addr_list_count(l) ((l)->count) |
227 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
228 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
229 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 230 | |
22bedad3 JP |
231 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
232 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
233 | #define netdev_for_each_uc_addr(ha, dev) \ | |
234 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 235 | |
22bedad3 JP |
236 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
237 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 238 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 239 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 240 | |
d94d9fee | 241 | struct hh_cache { |
5b3dc2f3 | 242 | unsigned int hh_len; |
3644f0ce | 243 | seqlock_t hh_lock; |
1da177e4 LT |
244 | |
245 | /* cached hardware header; allow for machine alignment needs. */ | |
246 | #define HH_DATA_MOD 16 | |
247 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 248 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
249 | #define HH_DATA_ALIGN(__len) \ |
250 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
251 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
252 | }; | |
253 | ||
5e82b4b2 | 254 | /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. |
1da177e4 LT |
255 | * Alternative is: |
256 | * dev->hard_header_len ? (dev->hard_header_len + | |
257 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
258 | * | |
259 | * We could use other alignment values, but we must maintain the | |
260 | * relationship HH alignment <= LL alignment. | |
261 | */ | |
262 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 263 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 264 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 265 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 266 | |
3b04ddde SH |
267 | struct header_ops { |
268 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
269 | unsigned short type, const void *daddr, | |
95c96174 | 270 | const void *saddr, unsigned int len); |
3b04ddde | 271 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
e69dd336 | 272 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
273 | void (*cache_update)(struct hh_cache *hh, |
274 | const struct net_device *dev, | |
275 | const unsigned char *haddr); | |
2793a23a | 276 | bool (*validate)(const char *ll_header, unsigned int len); |
3b04ddde SH |
277 | }; |
278 | ||
1da177e4 | 279 | /* These flag bits are private to the generic network queueing |
5e82b4b2 | 280 | * layer; they may not be explicitly referenced by any other |
1da177e4 LT |
281 | * code. |
282 | */ | |
283 | ||
d94d9fee | 284 | enum netdev_state_t { |
1da177e4 LT |
285 | __LINK_STATE_START, |
286 | __LINK_STATE_PRESENT, | |
1da177e4 | 287 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
288 | __LINK_STATE_LINKWATCH_PENDING, |
289 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
290 | }; |
291 | ||
292 | ||
293 | /* | |
5e82b4b2 | 294 | * This structure holds boot-time configured netdevice settings. They |
fe2918b0 | 295 | * are then used in the device probing. |
1da177e4 LT |
296 | */ |
297 | struct netdev_boot_setup { | |
298 | char name[IFNAMSIZ]; | |
299 | struct ifmap map; | |
300 | }; | |
301 | #define NETDEV_BOOT_SETUP_MAX 8 | |
302 | ||
f629d208 | 303 | int __init netdev_boot_setup(char *str); |
1da177e4 | 304 | |
bea3348e SH |
305 | /* |
306 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
307 | */ | |
308 | struct napi_struct { | |
309 | /* The poll_list must only be managed by the entity which | |
310 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
311 | * whoever atomically sets that bit can add this napi_struct | |
5e82b4b2 | 312 | * to the per-CPU poll_list, and whoever clears that bit |
bea3348e SH |
313 | * can remove from the list right before clearing the bit. |
314 | */ | |
315 | struct list_head poll_list; | |
316 | ||
317 | unsigned long state; | |
318 | int weight; | |
404f7c9e | 319 | unsigned int gro_count; |
bea3348e SH |
320 | int (*poll)(struct napi_struct *, int); |
321 | #ifdef CONFIG_NETPOLL | |
bea3348e | 322 | int poll_owner; |
bea3348e | 323 | #endif |
5d38a079 | 324 | struct net_device *dev; |
d565b0a1 | 325 | struct sk_buff *gro_list; |
5d38a079 | 326 | struct sk_buff *skb; |
3b47d303 | 327 | struct hrtimer timer; |
404f7c9e | 328 | struct list_head dev_list; |
af12fa6e ET |
329 | struct hlist_node napi_hash_node; |
330 | unsigned int napi_id; | |
bea3348e SH |
331 | }; |
332 | ||
d94d9fee | 333 | enum { |
bea3348e | 334 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
39e6c820 | 335 | NAPI_STATE_MISSED, /* reschedule a napi */ |
a0a46196 | 336 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 337 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
d64b5e85 ED |
338 | NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */ |
339 | NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */ | |
217f6974 ED |
340 | NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */ |
341 | }; | |
342 | ||
343 | enum { | |
39e6c820 ED |
344 | NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED), |
345 | NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED), | |
346 | NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE), | |
347 | NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC), | |
348 | NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED), | |
349 | NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL), | |
350 | NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL), | |
bea3348e SH |
351 | }; |
352 | ||
5b252f0c | 353 | enum gro_result { |
d1c76af9 HX |
354 | GRO_MERGED, |
355 | GRO_MERGED_FREE, | |
356 | GRO_HELD, | |
357 | GRO_NORMAL, | |
358 | GRO_DROP, | |
25393d3f | 359 | GRO_CONSUMED, |
d1c76af9 | 360 | }; |
5b252f0c | 361 | typedef enum gro_result gro_result_t; |
d1c76af9 | 362 | |
8a4eb573 JP |
363 | /* |
364 | * enum rx_handler_result - Possible return values for rx_handlers. | |
365 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
366 | * further. | |
367 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
368 | * case skb->dev was changed by rx_handler. | |
369 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
5e82b4b2 | 370 | * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. |
8a4eb573 JP |
371 | * |
372 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
373 | * special processing of the skb, prior to delivery to protocol handlers. | |
374 | * | |
375 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
376 | * to register a second rx_handler will return -EBUSY. | |
377 | * | |
378 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
379 | * To unregister a rx_handler on a net_device, use | |
380 | * netdev_rx_handler_unregister(). | |
381 | * | |
382 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
383 | * do with the skb. | |
384 | * | |
5e82b4b2 | 385 | * If the rx_handler consumed the skb in some way, it should return |
8a4eb573 | 386 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
5e82b4b2 | 387 | * the skb to be delivered in some other way. |
8a4eb573 JP |
388 | * |
389 | * If the rx_handler changed skb->dev, to divert the skb to another | |
390 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
391 | * new device will be called if it exists. | |
392 | * | |
5e82b4b2 | 393 | * If the rx_handler decides the skb should be ignored, it should return |
8a4eb573 | 394 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
d93cf068 | 395 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 | 396 | * |
5e82b4b2 | 397 | * If the rx_handler didn't change skb->dev, but wants the skb to be normally |
8a4eb573 JP |
398 | * delivered, it should return RX_HANDLER_PASS. |
399 | * | |
400 | * A device without a registered rx_handler will behave as if rx_handler | |
401 | * returned RX_HANDLER_PASS. | |
402 | */ | |
403 | ||
404 | enum rx_handler_result { | |
405 | RX_HANDLER_CONSUMED, | |
406 | RX_HANDLER_ANOTHER, | |
407 | RX_HANDLER_EXACT, | |
408 | RX_HANDLER_PASS, | |
409 | }; | |
410 | typedef enum rx_handler_result rx_handler_result_t; | |
411 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 412 | |
f629d208 | 413 | void __napi_schedule(struct napi_struct *n); |
bc9ad166 | 414 | void __napi_schedule_irqoff(struct napi_struct *n); |
bea3348e | 415 | |
4d29515f | 416 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
417 | { |
418 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
419 | } | |
420 | ||
39e6c820 | 421 | bool napi_schedule_prep(struct napi_struct *n); |
bea3348e SH |
422 | |
423 | /** | |
424 | * napi_schedule - schedule NAPI poll | |
5e82b4b2 | 425 | * @n: NAPI context |
bea3348e SH |
426 | * |
427 | * Schedule NAPI poll routine to be called if it is not already | |
428 | * running. | |
429 | */ | |
430 | static inline void napi_schedule(struct napi_struct *n) | |
431 | { | |
432 | if (napi_schedule_prep(n)) | |
433 | __napi_schedule(n); | |
434 | } | |
435 | ||
bc9ad166 ED |
436 | /** |
437 | * napi_schedule_irqoff - schedule NAPI poll | |
5e82b4b2 | 438 | * @n: NAPI context |
bc9ad166 ED |
439 | * |
440 | * Variant of napi_schedule(), assuming hard irqs are masked. | |
441 | */ | |
442 | static inline void napi_schedule_irqoff(struct napi_struct *n) | |
443 | { | |
444 | if (napi_schedule_prep(n)) | |
445 | __napi_schedule_irqoff(n); | |
446 | } | |
447 | ||
bfe13f54 | 448 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 449 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
450 | { |
451 | if (napi_schedule_prep(napi)) { | |
452 | __napi_schedule(napi); | |
4d29515f | 453 | return true; |
bfe13f54 | 454 | } |
4d29515f | 455 | return false; |
bfe13f54 RD |
456 | } |
457 | ||
364b6055 | 458 | bool napi_complete_done(struct napi_struct *n, int work_done); |
bea3348e SH |
459 | /** |
460 | * napi_complete - NAPI processing complete | |
5e82b4b2 | 461 | * @n: NAPI context |
bea3348e SH |
462 | * |
463 | * Mark NAPI processing as complete. | |
3b47d303 | 464 | * Consider using napi_complete_done() instead. |
364b6055 | 465 | * Return false if device should avoid rearming interrupts. |
bea3348e | 466 | */ |
364b6055 | 467 | static inline bool napi_complete(struct napi_struct *n) |
3b47d303 ED |
468 | { |
469 | return napi_complete_done(n, 0); | |
470 | } | |
bea3348e | 471 | |
af12fa6e ET |
472 | /** |
473 | * napi_hash_del - remove a NAPI from global table | |
5e82b4b2 | 474 | * @napi: NAPI context |
af12fa6e | 475 | * |
5e82b4b2 | 476 | * Warning: caller must observe RCU grace period |
34cbe27e ED |
477 | * before freeing memory containing @napi, if |
478 | * this function returns true. | |
93d05d4a | 479 | * Note: core networking stack automatically calls it |
5e82b4b2 | 480 | * from netif_napi_del(). |
93d05d4a | 481 | * Drivers might want to call this helper to combine all |
5e82b4b2 | 482 | * the needed RCU grace periods into a single one. |
af12fa6e | 483 | */ |
34cbe27e | 484 | bool napi_hash_del(struct napi_struct *napi); |
af12fa6e | 485 | |
bea3348e SH |
486 | /** |
487 | * napi_disable - prevent NAPI from scheduling | |
5e82b4b2 | 488 | * @n: NAPI context |
bea3348e SH |
489 | * |
490 | * Stop NAPI from being scheduled on this context. | |
491 | * Waits till any outstanding processing completes. | |
492 | */ | |
3b47d303 | 493 | void napi_disable(struct napi_struct *n); |
bea3348e SH |
494 | |
495 | /** | |
496 | * napi_enable - enable NAPI scheduling | |
5e82b4b2 | 497 | * @n: NAPI context |
bea3348e SH |
498 | * |
499 | * Resume NAPI from being scheduled on this context. | |
500 | * Must be paired with napi_disable. | |
501 | */ | |
502 | static inline void napi_enable(struct napi_struct *n) | |
503 | { | |
504 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
4e857c58 | 505 | smp_mb__before_atomic(); |
bea3348e | 506 | clear_bit(NAPI_STATE_SCHED, &n->state); |
2d8bff12 | 507 | clear_bit(NAPI_STATE_NPSVC, &n->state); |
bea3348e SH |
508 | } |
509 | ||
c264c3de SH |
510 | /** |
511 | * napi_synchronize - wait until NAPI is not running | |
5e82b4b2 | 512 | * @n: NAPI context |
c264c3de SH |
513 | * |
514 | * Wait until NAPI is done being scheduled on this context. | |
515 | * Waits till any outstanding processing completes but | |
516 | * does not disable future activations. | |
517 | */ | |
518 | static inline void napi_synchronize(const struct napi_struct *n) | |
519 | { | |
facc432f AB |
520 | if (IS_ENABLED(CONFIG_SMP)) |
521 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
522 | msleep(1); | |
523 | else | |
524 | barrier(); | |
c264c3de | 525 | } |
c264c3de | 526 | |
d94d9fee | 527 | enum netdev_queue_state_t { |
73466498 TH |
528 | __QUEUE_STATE_DRV_XOFF, |
529 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 530 | __QUEUE_STATE_FROZEN, |
79d16385 | 531 | }; |
8e2f1a63 DB |
532 | |
533 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) | |
534 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) | |
535 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) | |
536 | ||
537 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) | |
538 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
539 | QUEUE_STATE_FROZEN) | |
540 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ | |
541 | QUEUE_STATE_FROZEN) | |
542 | ||
73466498 TH |
543 | /* |
544 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
545 | * netif_tx_* functions below are used to manipulate this flag. The | |
546 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
547 | * queue independently. The netif_xmit_*stopped functions below are called | |
548 | * to check if the queue has been stopped by the driver or stack (either | |
549 | * of the XOFF bits are set in the state). Drivers should not need to call | |
550 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
551 | */ | |
79d16385 | 552 | |
bb949fbd | 553 | struct netdev_queue { |
6a321cb3 | 554 | /* |
5e82b4b2 | 555 | * read-mostly part |
6a321cb3 | 556 | */ |
bb949fbd | 557 | struct net_device *dev; |
46e5da40 | 558 | struct Qdisc __rcu *qdisc; |
b0e1e646 | 559 | struct Qdisc *qdisc_sleeping; |
ccf5ff69 | 560 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
561 | struct kobject kobj; |
562 | #endif | |
f2cd2d3e ED |
563 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
564 | int numa_node; | |
565 | #endif | |
c0ef079c FW |
566 | unsigned long tx_maxrate; |
567 | /* | |
568 | * Number of TX timeouts for this queue | |
569 | * (/sys/class/net/DEV/Q/trans_timeout) | |
570 | */ | |
571 | unsigned long trans_timeout; | |
6a321cb3 | 572 | /* |
5e82b4b2 | 573 | * write-mostly part |
6a321cb3 ED |
574 | */ |
575 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
576 | int xmit_lock_owner; | |
9d21493b | 577 | /* |
9b36627a | 578 | * Time (in jiffies) of last Tx |
9d21493b ED |
579 | */ |
580 | unsigned long trans_start; | |
ccf5ff69 | 581 | |
114cf580 TH |
582 | unsigned long state; |
583 | ||
584 | #ifdef CONFIG_BQL | |
585 | struct dql dql; | |
586 | #endif | |
e8a0464c | 587 | } ____cacheline_aligned_in_smp; |
bb949fbd | 588 | |
79134e6c ED |
589 | extern int sysctl_fb_tunnels_only_for_init_net; |
590 | ||
591 | static inline bool net_has_fallback_tunnels(const struct net *net) | |
592 | { | |
be9fc097 AB |
593 | return net == &init_net || |
594 | !IS_ENABLED(CONFIG_SYSCTL) || | |
595 | !sysctl_fb_tunnels_only_for_init_net; | |
79134e6c ED |
596 | } |
597 | ||
f2cd2d3e ED |
598 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
599 | { | |
600 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
601 | return q->numa_node; | |
602 | #else | |
b236da69 | 603 | return NUMA_NO_NODE; |
f2cd2d3e ED |
604 | #endif |
605 | } | |
606 | ||
607 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
608 | { | |
609 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
610 | q->numa_node = node; | |
611 | #endif | |
612 | } | |
613 | ||
df334545 | 614 | #ifdef CONFIG_RPS |
0a9627f2 TH |
615 | /* |
616 | * This structure holds an RPS map which can be of variable length. The | |
617 | * map is an array of CPUs. | |
618 | */ | |
619 | struct rps_map { | |
620 | unsigned int len; | |
621 | struct rcu_head rcu; | |
622 | u16 cpus[0]; | |
623 | }; | |
60b778ce | 624 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 625 | |
fec5e652 | 626 | /* |
c445477d BH |
627 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
628 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
629 | * a hardware filter index. | |
fec5e652 TH |
630 | */ |
631 | struct rps_dev_flow { | |
632 | u16 cpu; | |
c445477d | 633 | u16 filter; |
fec5e652 TH |
634 | unsigned int last_qtail; |
635 | }; | |
c445477d | 636 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
637 | |
638 | /* | |
639 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
640 | */ | |
641 | struct rps_dev_flow_table { | |
642 | unsigned int mask; | |
643 | struct rcu_head rcu; | |
fec5e652 TH |
644 | struct rps_dev_flow flows[0]; |
645 | }; | |
646 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 647 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
648 | |
649 | /* | |
650 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
651 | * on which they were processed by the application (set in recvmsg). | |
5e82b4b2 BH |
652 | * Each entry is a 32bit value. Upper part is the high-order bits |
653 | * of flow hash, lower part is CPU number. | |
567e4b79 | 654 | * rps_cpu_mask is used to partition the space, depending on number of |
5e82b4b2 BH |
655 | * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1 |
656 | * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f, | |
567e4b79 | 657 | * meaning we use 32-6=26 bits for the hash. |
fec5e652 TH |
658 | */ |
659 | struct rps_sock_flow_table { | |
567e4b79 | 660 | u32 mask; |
93c1af6c ED |
661 | |
662 | u32 ents[0] ____cacheline_aligned_in_smp; | |
fec5e652 | 663 | }; |
567e4b79 | 664 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num])) |
fec5e652 TH |
665 | |
666 | #define RPS_NO_CPU 0xffff | |
667 | ||
567e4b79 ED |
668 | extern u32 rps_cpu_mask; |
669 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; | |
670 | ||
fec5e652 TH |
671 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
672 | u32 hash) | |
673 | { | |
674 | if (table && hash) { | |
567e4b79 ED |
675 | unsigned int index = hash & table->mask; |
676 | u32 val = hash & ~rps_cpu_mask; | |
fec5e652 | 677 | |
5e82b4b2 | 678 | /* We only give a hint, preemption can change CPU under us */ |
567e4b79 | 679 | val |= raw_smp_processor_id(); |
fec5e652 | 680 | |
567e4b79 ED |
681 | if (table->ents[index] != val) |
682 | table->ents[index] = val; | |
fec5e652 TH |
683 | } |
684 | } | |
685 | ||
c445477d | 686 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
687 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
688 | u16 filter_id); | |
c445477d | 689 | #endif |
a953be53 | 690 | #endif /* CONFIG_RPS */ |
c445477d | 691 | |
0a9627f2 TH |
692 | /* This structure contains an instance of an RX queue. */ |
693 | struct netdev_rx_queue { | |
a953be53 | 694 | #ifdef CONFIG_RPS |
6e3f7faf ED |
695 | struct rps_map __rcu *rps_map; |
696 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 697 | #endif |
6e3f7faf | 698 | struct kobject kobj; |
fe822240 | 699 | struct net_device *dev; |
e817f856 | 700 | struct xdp_rxq_info xdp_rxq; |
0a9627f2 | 701 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
702 | |
703 | /* | |
704 | * RX queue sysfs structures and functions. | |
705 | */ | |
706 | struct rx_queue_attribute { | |
707 | struct attribute attr; | |
718ad681 | 708 | ssize_t (*show)(struct netdev_rx_queue *queue, char *buf); |
a953be53 | 709 | ssize_t (*store)(struct netdev_rx_queue *queue, |
718ad681 | 710 | const char *buf, size_t len); |
a953be53 | 711 | }; |
d314774c | 712 | |
bf264145 TH |
713 | #ifdef CONFIG_XPS |
714 | /* | |
715 | * This structure holds an XPS map which can be of variable length. The | |
716 | * map is an array of queues. | |
717 | */ | |
718 | struct xps_map { | |
719 | unsigned int len; | |
720 | unsigned int alloc_len; | |
721 | struct rcu_head rcu; | |
722 | u16 queues[0]; | |
723 | }; | |
60b778ce | 724 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
c59f419b HD |
725 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ |
726 | - sizeof(struct xps_map)) / sizeof(u16)) | |
bf264145 TH |
727 | |
728 | /* | |
729 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
730 | */ | |
731 | struct xps_dev_maps { | |
732 | struct rcu_head rcu; | |
a4177869 | 733 | struct xps_map __rcu *cpu_map[0]; |
bf264145 | 734 | }; |
184c449f AD |
735 | #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ |
736 | (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *))) | |
bf264145 TH |
737 | #endif /* CONFIG_XPS */ |
738 | ||
4f57c087 JF |
739 | #define TC_MAX_QUEUE 16 |
740 | #define TC_BITMASK 15 | |
741 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
742 | struct netdev_tc_txq { | |
743 | u16 count; | |
744 | u16 offset; | |
745 | }; | |
746 | ||
68bad94e NP |
747 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
748 | /* | |
749 | * This structure is to hold information about the device | |
750 | * configured to run FCoE protocol stack. | |
751 | */ | |
752 | struct netdev_fcoe_hbainfo { | |
753 | char manufacturer[64]; | |
754 | char serial_number[64]; | |
755 | char hardware_version[64]; | |
756 | char driver_version[64]; | |
757 | char optionrom_version[64]; | |
758 | char firmware_version[64]; | |
759 | char model[256]; | |
760 | char model_description[256]; | |
761 | }; | |
762 | #endif | |
763 | ||
02637fce | 764 | #define MAX_PHYS_ITEM_ID_LEN 32 |
66b52b0d | 765 | |
02637fce JP |
766 | /* This structure holds a unique identifier to identify some |
767 | * physical item (port for example) used by a netdevice. | |
66b52b0d | 768 | */ |
02637fce JP |
769 | struct netdev_phys_item_id { |
770 | unsigned char id[MAX_PHYS_ITEM_ID_LEN]; | |
66b52b0d JP |
771 | unsigned char id_len; |
772 | }; | |
773 | ||
d754f98b SF |
774 | static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, |
775 | struct netdev_phys_item_id *b) | |
776 | { | |
777 | return a->id_len == b->id_len && | |
778 | memcmp(a->id, b->id, a->id_len) == 0; | |
779 | } | |
780 | ||
99932d4f DB |
781 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
782 | struct sk_buff *skb); | |
783 | ||
2572ac53 | 784 | enum tc_setup_type { |
575ed7d3 | 785 | TC_SETUP_QDISC_MQPRIO, |
a1b7c5fd | 786 | TC_SETUP_CLSU32, |
5b33f488 | 787 | TC_SETUP_CLSFLOWER, |
ade9b658 | 788 | TC_SETUP_CLSMATCHALL, |
332ae8e2 | 789 | TC_SETUP_CLSBPF, |
8c4083b3 | 790 | TC_SETUP_BLOCK, |
8521db4c | 791 | TC_SETUP_QDISC_CBS, |
602f3baf | 792 | TC_SETUP_QDISC_RED, |
7fdb61b4 | 793 | TC_SETUP_QDISC_PRIO, |
16e5cc64 JF |
794 | }; |
795 | ||
f4e63525 JK |
796 | /* These structures hold the attributes of bpf state that are being passed |
797 | * to the netdevice through the bpf op. | |
a7862b45 | 798 | */ |
f4e63525 | 799 | enum bpf_netdev_command { |
a7862b45 BB |
800 | /* Set or clear a bpf program used in the earliest stages of packet |
801 | * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee | |
802 | * is responsible for calling bpf_prog_put on any old progs that are | |
803 | * stored. In case of error, the callee need not release the new prog | |
804 | * reference, but on success it takes ownership and must bpf_prog_put | |
805 | * when it is no longer used. | |
806 | */ | |
807 | XDP_SETUP_PROG, | |
ee5d032f | 808 | XDP_SETUP_PROG_HW, |
a7862b45 | 809 | /* Check if a bpf program is set on the device. The callee should |
ce158e58 JK |
810 | * set @prog_attached to one of XDP_ATTACHED_* values, note that "true" |
811 | * is equivalent to XDP_ATTACHED_DRV. | |
a7862b45 BB |
812 | */ |
813 | XDP_QUERY_PROG, | |
ab3f0063 JK |
814 | /* BPF program for offload callbacks, invoked at program load time. */ |
815 | BPF_OFFLOAD_VERIFIER_PREP, | |
816 | BPF_OFFLOAD_TRANSLATE, | |
817 | BPF_OFFLOAD_DESTROY, | |
a3884572 JK |
818 | BPF_OFFLOAD_MAP_ALLOC, |
819 | BPF_OFFLOAD_MAP_FREE, | |
a7862b45 BB |
820 | }; |
821 | ||
cae1927c | 822 | struct bpf_prog_offload_ops; |
ddf9f970 JK |
823 | struct netlink_ext_ack; |
824 | ||
f4e63525 JK |
825 | struct netdev_bpf { |
826 | enum bpf_netdev_command command; | |
a7862b45 BB |
827 | union { |
828 | /* XDP_SETUP_PROG */ | |
ddf9f970 | 829 | struct { |
32d60277 | 830 | u32 flags; |
ddf9f970 JK |
831 | struct bpf_prog *prog; |
832 | struct netlink_ext_ack *extack; | |
833 | }; | |
a7862b45 | 834 | /* XDP_QUERY_PROG */ |
58038695 | 835 | struct { |
ce158e58 | 836 | u8 prog_attached; |
58038695 | 837 | u32 prog_id; |
92f0292b JK |
838 | /* flags with which program was installed */ |
839 | u32 prog_flags; | |
58038695 | 840 | }; |
ab3f0063 JK |
841 | /* BPF_OFFLOAD_VERIFIER_PREP */ |
842 | struct { | |
843 | struct bpf_prog *prog; | |
cae1927c | 844 | const struct bpf_prog_offload_ops *ops; /* callee set */ |
ab3f0063 JK |
845 | } verifier; |
846 | /* BPF_OFFLOAD_TRANSLATE, BPF_OFFLOAD_DESTROY */ | |
847 | struct { | |
848 | struct bpf_prog *prog; | |
849 | } offload; | |
a3884572 JK |
850 | /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */ |
851 | struct { | |
852 | struct bpf_offloaded_map *offmap; | |
853 | }; | |
a7862b45 BB |
854 | }; |
855 | }; | |
16e5cc64 | 856 | |
d77e38e6 SK |
857 | #ifdef CONFIG_XFRM_OFFLOAD |
858 | struct xfrmdev_ops { | |
859 | int (*xdo_dev_state_add) (struct xfrm_state *x); | |
860 | void (*xdo_dev_state_delete) (struct xfrm_state *x); | |
861 | void (*xdo_dev_state_free) (struct xfrm_state *x); | |
862 | bool (*xdo_dev_offload_ok) (struct sk_buff *skb, | |
863 | struct xfrm_state *x); | |
50bd870a | 864 | void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); |
d77e38e6 SK |
865 | }; |
866 | #endif | |
867 | ||
6c557001 FW |
868 | struct dev_ifalias { |
869 | struct rcu_head rcuhead; | |
870 | char ifalias[]; | |
871 | }; | |
872 | ||
d314774c SH |
873 | /* |
874 | * This structure defines the management hooks for network devices. | |
00829823 SH |
875 | * The following hooks can be defined; unless noted otherwise, they are |
876 | * optional and can be filled with a null pointer. | |
d314774c SH |
877 | * |
878 | * int (*ndo_init)(struct net_device *dev); | |
5e82b4b2 BH |
879 | * This function is called once when a network device is registered. |
880 | * The network device can use this for any late stage initialization | |
881 | * or semantic validation. It can fail with an error code which will | |
882 | * be propagated back to register_netdev. | |
d314774c SH |
883 | * |
884 | * void (*ndo_uninit)(struct net_device *dev); | |
885 | * This function is called when device is unregistered or when registration | |
886 | * fails. It is not called if init fails. | |
887 | * | |
888 | * int (*ndo_open)(struct net_device *dev); | |
5e82b4b2 | 889 | * This function is called when a network device transitions to the up |
d314774c SH |
890 | * state. |
891 | * | |
892 | * int (*ndo_stop)(struct net_device *dev); | |
5e82b4b2 | 893 | * This function is called when a network device transitions to the down |
d314774c SH |
894 | * state. |
895 | * | |
dc1f8bf6 SH |
896 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
897 | * struct net_device *dev); | |
00829823 | 898 | * Called when a packet needs to be transmitted. |
e79d8429 RR |
899 | * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop |
900 | * the queue before that can happen; it's for obsolete devices and weird | |
901 | * corner cases, but the stack really does a non-trivial amount | |
902 | * of useless work if you return NETDEV_TX_BUSY. | |
5e82b4b2 | 903 | * Required; cannot be NULL. |
00829823 | 904 | * |
1a2a1444 DM |
905 | * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
906 | * struct net_device *dev | |
907 | * netdev_features_t features); | |
908 | * Called by core transmit path to determine if device is capable of | |
909 | * performing offload operations on a given packet. This is to give | |
910 | * the device an opportunity to implement any restrictions that cannot | |
911 | * be otherwise expressed by feature flags. The check is called with | |
912 | * the set of features that the stack has calculated and it returns | |
913 | * those the driver believes to be appropriate. | |
cdba756f | 914 | * |
f663dd9a | 915 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 916 | * void *accel_priv, select_queue_fallback_t fallback); |
5e82b4b2 | 917 | * Called to decide which queue to use when device supports multiple |
00829823 SH |
918 | * transmit queues. |
919 | * | |
d314774c SH |
920 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
921 | * This function is called to allow device receiver to make | |
5e82b4b2 | 922 | * changes to configuration when multicast or promiscuous is enabled. |
d314774c SH |
923 | * |
924 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
925 | * This function is called device changes address list filtering. | |
01789349 | 926 | * If driver handles unicast address filtering, it should set |
5e82b4b2 | 927 | * IFF_UNICAST_FLT in its priv_flags. |
d314774c SH |
928 | * |
929 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
930 | * This function is called when the Media Access Control address | |
37b607c5 | 931 | * needs to be changed. If this interface is not defined, the |
5e82b4b2 | 932 | * MAC address can not be changed. |
d314774c SH |
933 | * |
934 | * int (*ndo_validate_addr)(struct net_device *dev); | |
935 | * Test if Media Access Control address is valid for the device. | |
936 | * | |
937 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
5e82b4b2 BH |
938 | * Called when a user requests an ioctl which can't be handled by |
939 | * the generic interface code. If not defined ioctls return | |
d314774c SH |
940 | * not supported error code. |
941 | * | |
942 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
943 | * Used to set network devices bus interface parameters. This interface | |
5e82b4b2 | 944 | * is retained for legacy reasons; new devices should use the bus |
d314774c SH |
945 | * interface (PCI) for low level management. |
946 | * | |
947 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
948 | * Called when a user wants to change the Maximum Transfer Unit | |
db46a0e1 | 949 | * of a device. |
d314774c | 950 | * |
00829823 | 951 | * void (*ndo_tx_timeout)(struct net_device *dev); |
5e82b4b2 | 952 | * Callback used when the transmitter has not made any progress |
d314774c SH |
953 | * for dev->watchdog ticks. |
954 | * | |
bc1f4470 | 955 | * void (*ndo_get_stats64)(struct net_device *dev, |
956 | * struct rtnl_link_stats64 *storage); | |
d308e38f | 957 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 958 | * Called when a user wants to get the network device usage |
be1f3c2c | 959 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
960 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
961 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 962 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
963 | * (which should normally be dev->stats) and return a pointer to |
964 | * it. The structure may be changed asynchronously only if each | |
965 | * field is written atomically. | |
966 | * 3. Update dev->stats asynchronously and atomically, and define | |
967 | * neither operation. | |
d314774c | 968 | * |
3df5b3c6 | 969 | * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) |
2c9d85d4 NF |
970 | * Return true if this device supports offload stats of this attr_id. |
971 | * | |
972 | * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, | |
973 | * void *attr_data) | |
974 | * Get statistics for offload operations by attr_id. Write it into the | |
975 | * attr_data pointer. | |
976 | * | |
5d632cb7 | 977 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 978 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 979 | * VLAN id is registered. |
d314774c | 980 | * |
5d632cb7 | 981 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 982 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 983 | * VLAN id is unregistered. |
d314774c SH |
984 | * |
985 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
986 | * |
987 | * SR-IOV management functions. | |
988 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
79aab093 MS |
989 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, |
990 | * u8 qos, __be16 proto); | |
ed616689 SC |
991 | * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
992 | * int max_tx_rate); | |
5f8444a3 | 993 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
dd461d6a | 994 | * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
995 | * int (*ndo_get_vf_config)(struct net_device *dev, |
996 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 997 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
998 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
999 | * struct nlattr *port[]); | |
01a3d796 VZ |
1000 | * |
1001 | * Enable or disable the VF ability to query its RSS Redirection Table and | |
1002 | * Hash Key. This is needed since on some devices VF share this information | |
5e82b4b2 | 1003 | * with PF and querying it may introduce a theoretical security risk. |
01a3d796 | 1004 | * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); |
57b61080 | 1005 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
2572ac53 | 1006 | * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, |
de4784ca | 1007 | * void *type_data); |
6a4bc2b4 FF |
1008 | * Called to setup any 'tc' scheduler, classifier or action on @dev. |
1009 | * This is always called from the stack with the rtnl lock held and netif | |
1010 | * tx queues stopped. This allows the netdevice to perform queue | |
1011 | * management safely. | |
c445477d | 1012 | * |
e9bce845 YZ |
1013 | * Fiber Channel over Ethernet (FCoE) offload functions. |
1014 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
1015 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
1016 | * so the underlying device can perform whatever needed configuration or | |
1017 | * initialization to support acceleration of FCoE traffic. | |
1018 | * | |
1019 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
1020 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
1021 | * so the underlying device can perform whatever needed clean-ups to | |
1022 | * stop supporting acceleration of FCoE traffic. | |
1023 | * | |
1024 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
1025 | * struct scatterlist *sgl, unsigned int sgc); | |
1026 | * Called when the FCoE Initiator wants to initialize an I/O that | |
1027 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
1028 | * perform necessary setup and returns 1 to indicate the device is set up | |
1029 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
1030 | * | |
1031 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
1032 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
1033 | * indicated by the FC exchange id 'xid', so the underlying device can | |
1034 | * clean up and reuse resources for later DDP requests. | |
1035 | * | |
1036 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
1037 | * struct scatterlist *sgl, unsigned int sgc); | |
1038 | * Called when the FCoE Target wants to initialize an I/O that | |
1039 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
1040 | * perform necessary setup and returns 1 to indicate the device is set up | |
1041 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
1042 | * | |
68bad94e NP |
1043 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1044 | * struct netdev_fcoe_hbainfo *hbainfo); | |
1045 | * Called when the FCoE Protocol stack wants information on the underlying | |
1046 | * device. This information is utilized by the FCoE protocol stack to | |
1047 | * register attributes with Fiber Channel management service as per the | |
1048 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
1049 | * | |
e9bce845 YZ |
1050 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
1051 | * Called when the underlying device wants to override default World Wide | |
1052 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
1053 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
1054 | * protocol stack to use. | |
1055 | * | |
c445477d BH |
1056 | * RFS acceleration. |
1057 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
1058 | * u16 rxq_index, u32 flow_id); | |
1059 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
1060 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
1061 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 1062 | * |
8b98a70c | 1063 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
1064 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
1065 | * Called to make another netdev an underling. | |
1066 | * | |
1067 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
1068 | * Called to release previously enslaved netdev. | |
5455c699 MM |
1069 | * |
1070 | * Feature/offload setting functions. | |
1a2a1444 DM |
1071 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1072 | * netdev_features_t features); | |
1073 | * Adjusts the requested feature flags according to device-specific | |
1074 | * constraints, and returns the resulting flags. Must not modify | |
1075 | * the device state. | |
1076 | * | |
c8f44aff | 1077 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
1078 | * Called to update device configuration to new features. Passed |
1079 | * feature set might be less than what was returned by ndo_fix_features()). | |
1080 | * Must return >0 or -errno if it changed dev->features itself. | |
1081 | * | |
edc7d573 | 1082 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
1083 | * struct net_device *dev, | |
f6f6424b | 1084 | * const unsigned char *addr, u16 vid, u16 flags) |
77162022 | 1085 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
1086 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
1087 | * struct net_device *dev, | |
f6f6424b | 1088 | * const unsigned char *addr, u16 vid) |
77162022 JF |
1089 | * Deletes the FDB entry from dev coresponding to addr. |
1090 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 1091 | * struct net_device *dev, struct net_device *filter_dev, |
d297653d | 1092 | * int *idx) |
77162022 JF |
1093 | * Used to add FDB entries to dump requests. Implementers should add |
1094 | * entries to skb and update idx with the number of entries. | |
e5a55a89 | 1095 | * |
ad41faa8 ND |
1096 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, |
1097 | * u16 flags) | |
e5a55a89 | 1098 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
46c264da ND |
1099 | * struct net_device *dev, u32 filter_mask, |
1100 | * int nlflags) | |
ad41faa8 ND |
1101 | * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, |
1102 | * u16 flags); | |
4bf84c35 JP |
1103 | * |
1104 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
1105 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
1106 | * which do not represent real hardware may define this to allow their | |
1107 | * userspace components to manage their virtual carrier state. Devices | |
1108 | * that determine carrier state from physical hardware properties (eg | |
1109 | * network cables) or protocol-dependent mechanisms (eg | |
1110 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
1111 | * |
1112 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
02637fce | 1113 | * struct netdev_phys_item_id *ppid); |
66b52b0d JP |
1114 | * Called to get ID of physical port of this device. If driver does |
1115 | * not implement this, it is assumed that the hw is not able to have | |
1116 | * multiple net devices on single physical port. | |
53cf5275 | 1117 | * |
7c46a640 AD |
1118 | * void (*ndo_udp_tunnel_add)(struct net_device *dev, |
1119 | * struct udp_tunnel_info *ti); | |
1120 | * Called by UDP tunnel to notify a driver about the UDP port and socket | |
1121 | * address family that a UDP tunnel is listnening to. It is called only | |
1122 | * when a new port starts listening. The operation is protected by the | |
1123 | * RTNL. | |
1124 | * | |
1125 | * void (*ndo_udp_tunnel_del)(struct net_device *dev, | |
1126 | * struct udp_tunnel_info *ti); | |
1127 | * Called by UDP tunnel to notify the driver about a UDP port and socket | |
1128 | * address family that the UDP tunnel is not listening to anymore. The | |
1129 | * operation is protected by the RTNL. | |
1130 | * | |
a6cc0cfa JF |
1131 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1132 | * struct net_device *dev) | |
1133 | * Called by upper layer devices to accelerate switching or other | |
1134 | * station functionality into hardware. 'pdev is the lowerdev | |
1135 | * to use for the offload and 'dev' is the net device that will | |
1136 | * back the offload. Returns a pointer to the private structure | |
1137 | * the upper layer will maintain. | |
1138 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
1139 | * Called by upper layer device to delete the station created | |
1140 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
1141 | * the station and priv is the structure returned by the add | |
1142 | * operation. | |
822b3b2e JF |
1143 | * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1144 | * int queue_index, u32 maxrate); | |
1145 | * Called when a user wants to set a max-rate limitation of specific | |
1146 | * TX queue. | |
a54acb3a ND |
1147 | * int (*ndo_get_iflink)(const struct net_device *dev); |
1148 | * Called to get the iflink value of this device. | |
d746d707 | 1149 | * void (*ndo_change_proto_down)(struct net_device *dev, |
5e82b4b2 | 1150 | * bool proto_down); |
d746d707 AK |
1151 | * This function is used to pass protocol port error state information |
1152 | * to the switch driver. The switch driver can react to the proto_down | |
1153 | * by doing a phys down on the associated switch port. | |
fc4099f1 PS |
1154 | * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); |
1155 | * This function is used to get egress tunnel information for given skb. | |
1156 | * This is useful for retrieving outer tunnel header parameters while | |
1157 | * sampling packet. | |
871b642a PA |
1158 | * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); |
1159 | * This function is used to specify the headroom that the skb must | |
1160 | * consider when allocation skb during packet reception. Setting | |
1161 | * appropriate rx headroom value allows avoiding skb head copy on | |
5e82b4b2 | 1162 | * forward. Setting a negative value resets the rx headroom to the |
871b642a | 1163 | * default value. |
f4e63525 | 1164 | * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf); |
a7862b45 | 1165 | * This function is used to set or query state related to XDP on the |
f4e63525 JK |
1166 | * netdevice and manage BPF offload. See definition of |
1167 | * enum bpf_netdev_command for details. | |
44fa2dbd | 1168 | * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_frame *xdp); |
814abfab JF |
1169 | * This function is used to submit a XDP packet for transmit on a |
1170 | * netdevice. | |
11393cc9 | 1171 | * void (*ndo_xdp_flush)(struct net_device *dev); |
f16ded59 RR |
1172 | * This function is used to inform the driver to flush a particular |
1173 | * xdp tx queue. Must be called on same CPU as xdp_xmit. | |
d314774c SH |
1174 | */ |
1175 | struct net_device_ops { | |
1176 | int (*ndo_init)(struct net_device *dev); | |
1177 | void (*ndo_uninit)(struct net_device *dev); | |
1178 | int (*ndo_open)(struct net_device *dev); | |
1179 | int (*ndo_stop)(struct net_device *dev); | |
cdba756f ED |
1180 | netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
1181 | struct net_device *dev); | |
1182 | netdev_features_t (*ndo_features_check)(struct sk_buff *skb, | |
1183 | struct net_device *dev, | |
1184 | netdev_features_t features); | |
00829823 | 1185 | u16 (*ndo_select_queue)(struct net_device *dev, |
f663dd9a | 1186 | struct sk_buff *skb, |
99932d4f DB |
1187 | void *accel_priv, |
1188 | select_queue_fallback_t fallback); | |
d314774c SH |
1189 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1190 | int flags); | |
d314774c | 1191 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1192 | int (*ndo_set_mac_address)(struct net_device *dev, |
1193 | void *addr); | |
d314774c | 1194 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1195 | int (*ndo_do_ioctl)(struct net_device *dev, |
1196 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1197 | int (*ndo_set_config)(struct net_device *dev, |
1198 | struct ifmap *map); | |
00829823 SH |
1199 | int (*ndo_change_mtu)(struct net_device *dev, |
1200 | int new_mtu); | |
1201 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1202 | struct neigh_parms *); | |
d314774c SH |
1203 | void (*ndo_tx_timeout) (struct net_device *dev); |
1204 | ||
bc1f4470 | 1205 | void (*ndo_get_stats64)(struct net_device *dev, |
1206 | struct rtnl_link_stats64 *storage); | |
3df5b3c6 | 1207 | bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); |
2c9d85d4 NF |
1208 | int (*ndo_get_offload_stats)(int attr_id, |
1209 | const struct net_device *dev, | |
1210 | void *attr_data); | |
d314774c SH |
1211 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1212 | ||
8e586137 | 1213 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1214 | __be16 proto, u16 vid); |
8e586137 | 1215 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1216 | __be16 proto, u16 vid); |
d314774c | 1217 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1218 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1219 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1220 | struct netpoll_info *info); |
0e34e931 | 1221 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
d314774c | 1222 | #endif |
95c26df8 WM |
1223 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1224 | int queue, u8 *mac); | |
1225 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
79aab093 MS |
1226 | int queue, u16 vlan, |
1227 | u8 qos, __be16 proto); | |
ed616689 SC |
1228 | int (*ndo_set_vf_rate)(struct net_device *dev, |
1229 | int vf, int min_tx_rate, | |
1230 | int max_tx_rate); | |
5f8444a3 GR |
1231 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1232 | int vf, bool setting); | |
dd461d6a HS |
1233 | int (*ndo_set_vf_trust)(struct net_device *dev, |
1234 | int vf, bool setting); | |
95c26df8 WM |
1235 | int (*ndo_get_vf_config)(struct net_device *dev, |
1236 | int vf, | |
1237 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1238 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1239 | int vf, int link_state); | |
3b766cd8 EBE |
1240 | int (*ndo_get_vf_stats)(struct net_device *dev, |
1241 | int vf, | |
1242 | struct ifla_vf_stats | |
1243 | *vf_stats); | |
57b61080 SF |
1244 | int (*ndo_set_vf_port)(struct net_device *dev, |
1245 | int vf, | |
1246 | struct nlattr *port[]); | |
1247 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1248 | int vf, struct sk_buff *skb); | |
cc8e27cc EC |
1249 | int (*ndo_set_vf_guid)(struct net_device *dev, |
1250 | int vf, u64 guid, | |
1251 | int guid_type); | |
01a3d796 VZ |
1252 | int (*ndo_set_vf_rss_query_en)( |
1253 | struct net_device *dev, | |
1254 | int vf, bool setting); | |
16e5cc64 | 1255 | int (*ndo_setup_tc)(struct net_device *dev, |
2572ac53 | 1256 | enum tc_setup_type type, |
de4784ca | 1257 | void *type_data); |
d11ead75 | 1258 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1259 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1260 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1261 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1262 | u16 xid, | |
1263 | struct scatterlist *sgl, | |
1264 | unsigned int sgc); | |
1265 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1266 | u16 xid); | |
6247e086 YZ |
1267 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1268 | u16 xid, | |
1269 | struct scatterlist *sgl, | |
1270 | unsigned int sgc); | |
68bad94e NP |
1271 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1272 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1273 | #endif |
1274 | ||
d11ead75 | 1275 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1276 | #define NETDEV_FCOE_WWNN 0 |
1277 | #define NETDEV_FCOE_WWPN 1 | |
1278 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1279 | u64 *wwn, int type); | |
4d288d57 | 1280 | #endif |
3c9c36bc | 1281 | |
c445477d BH |
1282 | #ifdef CONFIG_RFS_ACCEL |
1283 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1284 | const struct sk_buff *skb, | |
1285 | u16 rxq_index, | |
1286 | u32 flow_id); | |
1287 | #endif | |
fbaec0ea | 1288 | int (*ndo_add_slave)(struct net_device *dev, |
33eaf2a6 DA |
1289 | struct net_device *slave_dev, |
1290 | struct netlink_ext_ack *extack); | |
fbaec0ea JP |
1291 | int (*ndo_del_slave)(struct net_device *dev, |
1292 | struct net_device *slave_dev); | |
c8f44aff MM |
1293 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1294 | netdev_features_t features); | |
5455c699 | 1295 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1296 | netdev_features_t features); |
503eebc2 JP |
1297 | int (*ndo_neigh_construct)(struct net_device *dev, |
1298 | struct neighbour *n); | |
1299 | void (*ndo_neigh_destroy)(struct net_device *dev, | |
1300 | struct neighbour *n); | |
77162022 JF |
1301 | |
1302 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1303 | struct nlattr *tb[], |
77162022 | 1304 | struct net_device *dev, |
6b6e2725 | 1305 | const unsigned char *addr, |
f6f6424b | 1306 | u16 vid, |
77162022 JF |
1307 | u16 flags); |
1308 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1309 | struct nlattr *tb[], |
77162022 | 1310 | struct net_device *dev, |
f6f6424b JP |
1311 | const unsigned char *addr, |
1312 | u16 vid); | |
77162022 JF |
1313 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1314 | struct netlink_callback *cb, | |
1315 | struct net_device *dev, | |
5d5eacb3 | 1316 | struct net_device *filter_dev, |
d297653d | 1317 | int *idx); |
e5a55a89 JF |
1318 | |
1319 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
add511b3 RP |
1320 | struct nlmsghdr *nlh, |
1321 | u16 flags); | |
e5a55a89 JF |
1322 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1323 | u32 pid, u32 seq, | |
6cbdceeb | 1324 | struct net_device *dev, |
46c264da ND |
1325 | u32 filter_mask, |
1326 | int nlflags); | |
407af329 | 1327 | int (*ndo_bridge_dellink)(struct net_device *dev, |
add511b3 RP |
1328 | struct nlmsghdr *nlh, |
1329 | u16 flags); | |
4bf84c35 JP |
1330 | int (*ndo_change_carrier)(struct net_device *dev, |
1331 | bool new_carrier); | |
66b52b0d | 1332 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
02637fce | 1333 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
1334 | int (*ndo_get_phys_port_name)(struct net_device *dev, |
1335 | char *name, size_t len); | |
7c46a640 AD |
1336 | void (*ndo_udp_tunnel_add)(struct net_device *dev, |
1337 | struct udp_tunnel_info *ti); | |
1338 | void (*ndo_udp_tunnel_del)(struct net_device *dev, | |
1339 | struct udp_tunnel_info *ti); | |
a6cc0cfa JF |
1340 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1341 | struct net_device *dev); | |
1342 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1343 | void *priv); | |
1344 | ||
25175ba5 | 1345 | int (*ndo_get_lock_subclass)(struct net_device *dev); |
822b3b2e JF |
1346 | int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1347 | int queue_index, | |
1348 | u32 maxrate); | |
a54acb3a | 1349 | int (*ndo_get_iflink)(const struct net_device *dev); |
d746d707 AK |
1350 | int (*ndo_change_proto_down)(struct net_device *dev, |
1351 | bool proto_down); | |
fc4099f1 PS |
1352 | int (*ndo_fill_metadata_dst)(struct net_device *dev, |
1353 | struct sk_buff *skb); | |
871b642a PA |
1354 | void (*ndo_set_rx_headroom)(struct net_device *dev, |
1355 | int needed_headroom); | |
f4e63525 JK |
1356 | int (*ndo_bpf)(struct net_device *dev, |
1357 | struct netdev_bpf *bpf); | |
814abfab | 1358 | int (*ndo_xdp_xmit)(struct net_device *dev, |
44fa2dbd | 1359 | struct xdp_frame *xdp); |
11393cc9 | 1360 | void (*ndo_xdp_flush)(struct net_device *dev); |
d314774c SH |
1361 | }; |
1362 | ||
7aa98047 LR |
1363 | /** |
1364 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1365 | * | |
1366 | * These are the &struct net_device, they are only set internally | |
1367 | * by drivers and used in the kernel. These flags are invisible to | |
5e82b4b2 | 1368 | * userspace; this means that the order of these flags can change |
7aa98047 LR |
1369 | * during any kernel release. |
1370 | * | |
1371 | * You should have a pretty good reason to be extending these flags. | |
1372 | * | |
1373 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1374 | * @IFF_EBRIDGE: Ethernet bridging device | |
7aa98047 | 1375 | * @IFF_BONDING: bonding master or slave |
7aa98047 | 1376 | * @IFF_ISATAP: ISATAP interface (RFC4214) |
7aa98047 LR |
1377 | * @IFF_WAN_HDLC: WAN HDLC device |
1378 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1379 | * release skb->dst | |
1380 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1381 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1382 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1383 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1384 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1385 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1386 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1387 | * @IFF_TEAM_PORT: device used as team port | |
1388 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1389 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1390 | * change when it's running | |
1391 | * @IFF_MACVLAN: Macvlan device | |
6d0e24cd LB |
1392 | * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account |
1393 | * underlying stacked devices | |
007979ea | 1394 | * @IFF_L3MDEV_MASTER: device is an L3 master device |
fa8187c9 | 1395 | * @IFF_NO_QUEUE: device can run without qdisc attached |
35d4e172 | 1396 | * @IFF_OPENVSWITCH: device is a Open vSwitch master |
fee6d4c7 | 1397 | * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device |
c981e421 | 1398 | * @IFF_TEAM: device is a team device |
d4ab4286 | 1399 | * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured |
871b642a PA |
1400 | * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external |
1401 | * entity (i.e. the master device for bridged veth) | |
3c175784 | 1402 | * @IFF_MACSEC: device is a MACsec device |
f5426250 | 1403 | * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook |
7aa98047 LR |
1404 | */ |
1405 | enum netdev_priv_flags { | |
1406 | IFF_802_1Q_VLAN = 1<<0, | |
1407 | IFF_EBRIDGE = 1<<1, | |
0dc1549b JP |
1408 | IFF_BONDING = 1<<2, |
1409 | IFF_ISATAP = 1<<3, | |
1410 | IFF_WAN_HDLC = 1<<4, | |
1411 | IFF_XMIT_DST_RELEASE = 1<<5, | |
1412 | IFF_DONT_BRIDGE = 1<<6, | |
1413 | IFF_DISABLE_NETPOLL = 1<<7, | |
1414 | IFF_MACVLAN_PORT = 1<<8, | |
1415 | IFF_BRIDGE_PORT = 1<<9, | |
1416 | IFF_OVS_DATAPATH = 1<<10, | |
1417 | IFF_TX_SKB_SHARING = 1<<11, | |
1418 | IFF_UNICAST_FLT = 1<<12, | |
1419 | IFF_TEAM_PORT = 1<<13, | |
1420 | IFF_SUPP_NOFCS = 1<<14, | |
1421 | IFF_LIVE_ADDR_CHANGE = 1<<15, | |
1422 | IFF_MACVLAN = 1<<16, | |
1423 | IFF_XMIT_DST_RELEASE_PERM = 1<<17, | |
1ec54cb4 PA |
1424 | IFF_L3MDEV_MASTER = 1<<18, |
1425 | IFF_NO_QUEUE = 1<<19, | |
1426 | IFF_OPENVSWITCH = 1<<20, | |
1427 | IFF_L3MDEV_SLAVE = 1<<21, | |
1428 | IFF_TEAM = 1<<22, | |
1429 | IFF_RXFH_CONFIGURED = 1<<23, | |
1430 | IFF_PHONY_HEADROOM = 1<<24, | |
1431 | IFF_MACSEC = 1<<25, | |
f5426250 | 1432 | IFF_NO_RX_HANDLER = 1<<26, |
7aa98047 LR |
1433 | }; |
1434 | ||
1435 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1436 | #define IFF_EBRIDGE IFF_EBRIDGE | |
7aa98047 | 1437 | #define IFF_BONDING IFF_BONDING |
7aa98047 | 1438 | #define IFF_ISATAP IFF_ISATAP |
7aa98047 LR |
1439 | #define IFF_WAN_HDLC IFF_WAN_HDLC |
1440 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1441 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1442 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1443 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1444 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1445 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1446 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1447 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1448 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1449 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1450 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1451 | #define IFF_MACVLAN IFF_MACVLAN | |
02875878 | 1452 | #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
007979ea | 1453 | #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER |
fa8187c9 | 1454 | #define IFF_NO_QUEUE IFF_NO_QUEUE |
35d4e172 | 1455 | #define IFF_OPENVSWITCH IFF_OPENVSWITCH |
8f25348b | 1456 | #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE |
c981e421 | 1457 | #define IFF_TEAM IFF_TEAM |
d4ab4286 | 1458 | #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED |
3c175784 | 1459 | #define IFF_MACSEC IFF_MACSEC |
f5426250 | 1460 | #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER |
7aa98047 | 1461 | |
536721b1 KK |
1462 | /** |
1463 | * struct net_device - The DEVICE structure. | |
d651983d MCC |
1464 | * |
1465 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1466 | * data with strictly "high-level" data, and it has to know about | |
1467 | * almost every data structure used in the INET module. | |
536721b1 KK |
1468 | * |
1469 | * @name: This is the first field of the "visible" part of this structure | |
1470 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
d651983d | 1471 | * of the interface. |
536721b1 KK |
1472 | * |
1473 | * @name_hlist: Device name hash chain, please keep it close to name[] | |
1474 | * @ifalias: SNMP alias | |
1475 | * @mem_end: Shared memory end | |
1476 | * @mem_start: Shared memory start | |
1477 | * @base_addr: Device I/O address | |
1478 | * @irq: Device IRQ number | |
1479 | * | |
1480 | * @state: Generic network queuing layer state, see netdev_state_t | |
1481 | * @dev_list: The global list of network devices | |
5e82b4b2 BH |
1482 | * @napi_list: List entry used for polling NAPI devices |
1483 | * @unreg_list: List entry when we are unregistering the | |
1484 | * device; see the function unregister_netdev | |
1485 | * @close_list: List entry used when we are closing the device | |
62d885fe BP |
1486 | * @ptype_all: Device-specific packet handlers for all protocols |
1487 | * @ptype_specific: Device-specific, protocol-specific packet handlers | |
536721b1 KK |
1488 | * |
1489 | * @adj_list: Directly linked devices, like slaves for bonding | |
536721b1 KK |
1490 | * @features: Currently active device features |
1491 | * @hw_features: User-changeable features | |
1492 | * | |
1493 | * @wanted_features: User-requested features | |
1494 | * @vlan_features: Mask of features inheritable by VLAN devices | |
1495 | * | |
1496 | * @hw_enc_features: Mask of features inherited by encapsulating devices | |
1497 | * This field indicates what encapsulation | |
1498 | * offloads the hardware is capable of doing, | |
1499 | * and drivers will need to set them appropriately. | |
1500 | * | |
1501 | * @mpls_features: Mask of features inheritable by MPLS | |
1502 | * | |
1503 | * @ifindex: interface index | |
5e82b4b2 | 1504 | * @group: The group the device belongs to |
536721b1 KK |
1505 | * |
1506 | * @stats: Statistics struct, which was left as a legacy, use | |
1507 | * rtnl_link_stats64 instead | |
1508 | * | |
1509 | * @rx_dropped: Dropped packets by core network, | |
1510 | * do not use this in drivers | |
1511 | * @tx_dropped: Dropped packets by core network, | |
1512 | * do not use this in drivers | |
6e7333d3 JW |
1513 | * @rx_nohandler: nohandler dropped packets by core network on |
1514 | * inactive devices, do not use this in drivers | |
9e55e5d3 FF |
1515 | * @carrier_up_count: Number of times the carrier has been up |
1516 | * @carrier_down_count: Number of times the carrier has been down | |
536721b1 | 1517 | * |
536721b1 KK |
1518 | * @wireless_handlers: List of functions to handle Wireless Extensions, |
1519 | * instead of ioctl, | |
1520 | * see <net/iw_handler.h> for details. | |
1521 | * @wireless_data: Instance data managed by the core of wireless extensions | |
1522 | * | |
1523 | * @netdev_ops: Includes several pointers to callbacks, | |
1524 | * if one wants to override the ndo_*() functions | |
1525 | * @ethtool_ops: Management operations | |
f997c55c AA |
1526 | * @ndisc_ops: Includes callbacks for different IPv6 neighbour |
1527 | * discovery handling. Necessary for e.g. 6LoWPAN. | |
d476059e | 1528 | * @header_ops: Includes callbacks for creating,parsing,caching,etc |
536721b1 KK |
1529 | * of Layer 2 headers. |
1530 | * | |
1531 | * @flags: Interface flags (a la BSD) | |
1532 | * @priv_flags: Like 'flags' but invisible to userspace, | |
1533 | * see if.h for the definitions | |
1534 | * @gflags: Global flags ( kept as legacy ) | |
1535 | * @padded: How much padding added by alloc_netdev() | |
1536 | * @operstate: RFC2863 operstate | |
1537 | * @link_mode: Mapping policy to operstate | |
1538 | * @if_port: Selectable AUI, TP, ... | |
1539 | * @dma: DMA channel | |
1540 | * @mtu: Interface MTU value | |
61e84623 JW |
1541 | * @min_mtu: Interface Minimum MTU value |
1542 | * @max_mtu: Interface Maximum MTU value | |
536721b1 | 1543 | * @type: Interface hardware type |
2793a23a | 1544 | * @hard_header_len: Maximum hardware header length. |
217e6fa2 | 1545 | * @min_header_len: Minimum hardware header length |
536721b1 KK |
1546 | * |
1547 | * @needed_headroom: Extra headroom the hardware may need, but not in all | |
1548 | * cases can this be guaranteed | |
1549 | * @needed_tailroom: Extra tailroom the hardware may need, but not in all | |
1550 | * cases can this be guaranteed. Some cases also use | |
1551 | * LL_MAX_HEADER instead to allocate the skb | |
1552 | * | |
1553 | * interface address info: | |
1554 | * | |
1555 | * @perm_addr: Permanent hw address | |
1556 | * @addr_assign_type: Hw address assignment type | |
1557 | * @addr_len: Hardware address length | |
8626a0c8 | 1558 | * @neigh_priv_len: Used in neigh_alloc() |
536721b1 KK |
1559 | * @dev_id: Used to differentiate devices that share |
1560 | * the same link layer address | |
1561 | * @dev_port: Used to differentiate devices that share | |
1562 | * the same function | |
1563 | * @addr_list_lock: XXX: need comments on this one | |
5e82b4b2 | 1564 | * @uc_promisc: Counter that indicates promiscuous mode |
536721b1 KK |
1565 | * has been enabled due to the need to listen to |
1566 | * additional unicast addresses in a device that | |
1567 | * does not implement ndo_set_rx_mode() | |
14ffbbb8 TG |
1568 | * @uc: unicast mac addresses |
1569 | * @mc: multicast mac addresses | |
1570 | * @dev_addrs: list of device hw addresses | |
1571 | * @queues_kset: Group of all Kobjects in the Tx and RX queues | |
5e82b4b2 BH |
1572 | * @promiscuity: Number of times the NIC is told to work in |
1573 | * promiscuous mode; if it becomes 0 the NIC will | |
1574 | * exit promiscuous mode | |
536721b1 KK |
1575 | * @allmulti: Counter, enables or disables allmulticast mode |
1576 | * | |
1577 | * @vlan_info: VLAN info | |
1578 | * @dsa_ptr: dsa specific data | |
1579 | * @tipc_ptr: TIPC specific data | |
1580 | * @atalk_ptr: AppleTalk link | |
1581 | * @ip_ptr: IPv4 specific data | |
1582 | * @dn_ptr: DECnet specific data | |
1583 | * @ip6_ptr: IPv6 specific data | |
1584 | * @ax25_ptr: AX.25 specific data | |
1585 | * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering | |
1586 | * | |
536721b1 KK |
1587 | * @dev_addr: Hw address (before bcast, |
1588 | * because most packets are unicast) | |
1589 | * | |
1590 | * @_rx: Array of RX queues | |
1591 | * @num_rx_queues: Number of RX queues | |
1592 | * allocated at register_netdev() time | |
1593 | * @real_num_rx_queues: Number of RX queues currently active in device | |
1594 | * | |
1595 | * @rx_handler: handler for received packets | |
1596 | * @rx_handler_data: XXX: need comments on this one | |
46209401 JP |
1597 | * @miniq_ingress: ingress/clsact qdisc specific data for |
1598 | * ingress processing | |
536721b1 KK |
1599 | * @ingress_queue: XXX: need comments on this one |
1600 | * @broadcast: hw bcast address | |
1601 | * | |
14ffbbb8 TG |
1602 | * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, |
1603 | * indexed by RX queue number. Assigned by driver. | |
1604 | * This must only be set if the ndo_rx_flow_steer | |
1605 | * operation is defined | |
1606 | * @index_hlist: Device index hash chain | |
1607 | * | |
536721b1 KK |
1608 | * @_tx: Array of TX queues |
1609 | * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time | |
1610 | * @real_num_tx_queues: Number of TX queues currently active in device | |
1611 | * @qdisc: Root qdisc from userspace point of view | |
1612 | * @tx_queue_len: Max frames per queue allowed | |
1613 | * @tx_global_lock: XXX: need comments on this one | |
1614 | * | |
1615 | * @xps_maps: XXX: need comments on this one | |
46209401 JP |
1616 | * @miniq_egress: clsact qdisc specific data for |
1617 | * egress processing | |
536721b1 | 1618 | * @watchdog_timeo: Represents the timeout that is used by |
5e82b4b2 | 1619 | * the watchdog (see dev_watchdog()) |
536721b1 KK |
1620 | * @watchdog_timer: List of timers |
1621 | * | |
1622 | * @pcpu_refcnt: Number of references to this device | |
1623 | * @todo_list: Delayed register/unregister | |
536721b1 KK |
1624 | * @link_watch_list: XXX: need comments on this one |
1625 | * | |
1626 | * @reg_state: Register/unregister state machine | |
1627 | * @dismantle: Device is going to be freed | |
1628 | * @rtnl_link_state: This enum represents the phases of creating | |
1629 | * a new link | |
1630 | * | |
cf124db5 DM |
1631 | * @needs_free_netdev: Should unregister perform free_netdev? |
1632 | * @priv_destructor: Called from unregister | |
536721b1 KK |
1633 | * @npinfo: XXX: need comments on this one |
1634 | * @nd_net: Network namespace this network device is inside | |
1635 | * | |
1636 | * @ml_priv: Mid-layer private | |
1637 | * @lstats: Loopback statistics | |
1638 | * @tstats: Tunnel statistics | |
1639 | * @dstats: Dummy statistics | |
1640 | * @vstats: Virtual ethernet statistics | |
1641 | * | |
1642 | * @garp_port: GARP | |
1643 | * @mrp_port: MRP | |
1644 | * | |
1645 | * @dev: Class/net/name entry | |
1646 | * @sysfs_groups: Space for optional device, statistics and wireless | |
1647 | * sysfs groups | |
1648 | * | |
1649 | * @sysfs_rx_queue_group: Space for optional per-rx queue attributes | |
1650 | * @rtnl_link_ops: Rtnl_link_ops | |
1651 | * | |
1652 | * @gso_max_size: Maximum size of generic segmentation offload | |
1653 | * @gso_max_segs: Maximum number of segments that can be passed to the | |
1654 | * NIC for GSO | |
1655 | * | |
1656 | * @dcbnl_ops: Data Center Bridging netlink ops | |
1657 | * @num_tc: Number of traffic classes in the net device | |
1658 | * @tc_to_txq: XXX: need comments on this one | |
920c1cd3 | 1659 | * @prio_tc_map: XXX: need comments on this one |
536721b1 KK |
1660 | * |
1661 | * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp | |
1662 | * | |
1663 | * @priomap: XXX: need comments on this one | |
1664 | * @phydev: Physical device may attach itself | |
1665 | * for hardware timestamping | |
e679c9c1 | 1666 | * @sfp_bus: attached &struct sfp_bus structure. |
536721b1 | 1667 | * |
123b3652 ED |
1668 | * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock |
1669 | * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount | |
536721b1 | 1670 | * |
d746d707 AK |
1671 | * @proto_down: protocol port state information can be sent to the |
1672 | * switch driver and used to set the phys state of the | |
1673 | * switch port. | |
1674 | * | |
1da177e4 LT |
1675 | * FIXME: cleanup struct net_device such that network protocol info |
1676 | * moves out. | |
1677 | */ | |
1678 | ||
d94d9fee | 1679 | struct net_device { |
1da177e4 | 1680 | char name[IFNAMSIZ]; |
9356b8fc | 1681 | struct hlist_node name_hlist; |
6c557001 | 1682 | struct dev_ifalias __rcu *ifalias; |
1da177e4 LT |
1683 | /* |
1684 | * I/O specific fields | |
1685 | * FIXME: Merge these and struct ifmap into one | |
1686 | */ | |
536721b1 KK |
1687 | unsigned long mem_end; |
1688 | unsigned long mem_start; | |
1689 | unsigned long base_addr; | |
1690 | int irq; | |
1da177e4 LT |
1691 | |
1692 | /* | |
536721b1 KK |
1693 | * Some hardware also needs these fields (state,dev_list, |
1694 | * napi_list,unreg_list,close_list) but they are not | |
1da177e4 LT |
1695 | * part of the usual set specified in Space.c. |
1696 | */ | |
1697 | ||
1da177e4 LT |
1698 | unsigned long state; |
1699 | ||
7562f876 | 1700 | struct list_head dev_list; |
bea3348e | 1701 | struct list_head napi_list; |
44a0873d | 1702 | struct list_head unreg_list; |
5cde2829 | 1703 | struct list_head close_list; |
7866a621 SN |
1704 | struct list_head ptype_all; |
1705 | struct list_head ptype_specific; | |
2f268f12 | 1706 | |
2f268f12 VF |
1707 | struct { |
1708 | struct list_head upper; | |
1709 | struct list_head lower; | |
1710 | } adj_list; | |
1711 | ||
c8f44aff | 1712 | netdev_features_t features; |
c8f44aff | 1713 | netdev_features_t hw_features; |
c8f44aff | 1714 | netdev_features_t wanted_features; |
c8f44aff | 1715 | netdev_features_t vlan_features; |
6a674e9c | 1716 | netdev_features_t hw_enc_features; |
0d89d203 | 1717 | netdev_features_t mpls_features; |
802ab55a | 1718 | netdev_features_t gso_partial_features; |
04ed3e74 | 1719 | |
1da177e4 | 1720 | int ifindex; |
7a66bbc9 | 1721 | int group; |
1da177e4 | 1722 | |
c45d286e | 1723 | struct net_device_stats stats; |
015f0688 | 1724 | |
015f0688 ED |
1725 | atomic_long_t rx_dropped; |
1726 | atomic_long_t tx_dropped; | |
6e7333d3 | 1727 | atomic_long_t rx_nohandler; |
1da177e4 | 1728 | |
b2d3bcfa DD |
1729 | /* Stats to monitor link on/off, flapping */ |
1730 | atomic_t carrier_up_count; | |
1731 | atomic_t carrier_down_count; | |
1732 | ||
b86e0280 | 1733 | #ifdef CONFIG_WIRELESS_EXT |
5e82b4b2 BH |
1734 | const struct iw_handler_def *wireless_handlers; |
1735 | struct iw_public_data *wireless_data; | |
b86e0280 | 1736 | #endif |
d314774c | 1737 | const struct net_device_ops *netdev_ops; |
76fd8593 | 1738 | const struct ethtool_ops *ethtool_ops; |
4170604f | 1739 | #ifdef CONFIG_NET_SWITCHDEV |
9d47c0a2 | 1740 | const struct switchdev_ops *switchdev_ops; |
4170604f | 1741 | #endif |
1b69c6d0 DA |
1742 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1743 | const struct l3mdev_ops *l3mdev_ops; | |
1744 | #endif | |
f997c55c AA |
1745 | #if IS_ENABLED(CONFIG_IPV6) |
1746 | const struct ndisc_ops *ndisc_ops; | |
1747 | #endif | |
1da177e4 | 1748 | |
9cb0d21d | 1749 | #ifdef CONFIG_XFRM_OFFLOAD |
d77e38e6 SK |
1750 | const struct xfrmdev_ops *xfrmdev_ops; |
1751 | #endif | |
1752 | ||
3b04ddde SH |
1753 | const struct header_ops *header_ops; |
1754 | ||
536721b1 KK |
1755 | unsigned int flags; |
1756 | unsigned int priv_flags; | |
1757 | ||
1da177e4 | 1758 | unsigned short gflags; |
536721b1 | 1759 | unsigned short padded; |
1da177e4 | 1760 | |
536721b1 KK |
1761 | unsigned char operstate; |
1762 | unsigned char link_mode; | |
b00055aa | 1763 | |
536721b1 KK |
1764 | unsigned char if_port; |
1765 | unsigned char dma; | |
bdc220da | 1766 | |
536721b1 | 1767 | unsigned int mtu; |
61e84623 JW |
1768 | unsigned int min_mtu; |
1769 | unsigned int max_mtu; | |
536721b1 KK |
1770 | unsigned short type; |
1771 | unsigned short hard_header_len; | |
d92be7a4 | 1772 | unsigned char min_header_len; |
1da177e4 | 1773 | |
f5184d26 JB |
1774 | unsigned short needed_headroom; |
1775 | unsigned short needed_tailroom; | |
1776 | ||
1da177e4 | 1777 | /* Interface address info. */ |
536721b1 KK |
1778 | unsigned char perm_addr[MAX_ADDR_LEN]; |
1779 | unsigned char addr_assign_type; | |
1780 | unsigned char addr_len; | |
a0a9663d | 1781 | unsigned short neigh_priv_len; |
536721b1 KK |
1782 | unsigned short dev_id; |
1783 | unsigned short dev_port; | |
ccffad25 | 1784 | spinlock_t addr_list_lock; |
14ffbbb8 TG |
1785 | unsigned char name_assign_type; |
1786 | bool uc_promisc; | |
536721b1 KK |
1787 | struct netdev_hw_addr_list uc; |
1788 | struct netdev_hw_addr_list mc; | |
1789 | struct netdev_hw_addr_list dev_addrs; | |
1790 | ||
4c3d5e7b ED |
1791 | #ifdef CONFIG_SYSFS |
1792 | struct kset *queues_kset; | |
1793 | #endif | |
9d45abe1 WC |
1794 | unsigned int promiscuity; |
1795 | unsigned int allmulti; | |
1da177e4 | 1796 | |
1da177e4 | 1797 | |
5e82b4b2 | 1798 | /* Protocol-specific pointers */ |
65ac6a5f | 1799 | |
d11ead75 | 1800 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
536721b1 | 1801 | struct vlan_info __rcu *vlan_info; |
65ac6a5f | 1802 | #endif |
34a430d7 | 1803 | #if IS_ENABLED(CONFIG_NET_DSA) |
2f657a60 | 1804 | struct dsa_port *dsa_ptr; |
37cb0620 YX |
1805 | #endif |
1806 | #if IS_ENABLED(CONFIG_TIPC) | |
536721b1 | 1807 | struct tipc_bearer __rcu *tipc_ptr; |
91da11f8 | 1808 | #endif |
89e58148 | 1809 | #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK) |
536721b1 | 1810 | void *atalk_ptr; |
89e58148 | 1811 | #endif |
536721b1 | 1812 | struct in_device __rcu *ip_ptr; |
330c7272 | 1813 | #if IS_ENABLED(CONFIG_DECNET) |
536721b1 | 1814 | struct dn_dev __rcu *dn_ptr; |
330c7272 | 1815 | #endif |
536721b1 | 1816 | struct inet6_dev __rcu *ip6_ptr; |
19ff13f2 | 1817 | #if IS_ENABLED(CONFIG_AX25) |
536721b1 | 1818 | void *ax25_ptr; |
19ff13f2 | 1819 | #endif |
536721b1 | 1820 | struct wireless_dev *ieee80211_ptr; |
98a18b6f | 1821 | struct wpan_dev *ieee802154_ptr; |
03c57747 RS |
1822 | #if IS_ENABLED(CONFIG_MPLS_ROUTING) |
1823 | struct mpls_dev __rcu *mpls_ptr; | |
1824 | #endif | |
1da177e4 | 1825 | |
9356b8fc | 1826 | /* |
cd13539b | 1827 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1828 | */ |
9356b8fc | 1829 | /* Interface address info used in eth_type_trans() */ |
536721b1 | 1830 | unsigned char *dev_addr; |
f001fde5 | 1831 | |
0a9627f2 | 1832 | struct netdev_rx_queue *_rx; |
0a9627f2 | 1833 | unsigned int num_rx_queues; |
62fe0b40 | 1834 | unsigned int real_num_rx_queues; |
0a9627f2 | 1835 | |
7acedaf5 | 1836 | struct bpf_prog __rcu *xdp_prog; |
3b47d303 | 1837 | unsigned long gro_flush_timeout; |
61391cde | 1838 | rx_handler_func_t __rcu *rx_handler; |
1839 | void __rcu *rx_handler_data; | |
e8a0464c | 1840 | |
4cda01e8 | 1841 | #ifdef CONFIG_NET_CLS_ACT |
46209401 | 1842 | struct mini_Qdisc __rcu *miniq_ingress; |
d2788d34 | 1843 | #endif |
24824a09 | 1844 | struct netdev_queue __rcu *ingress_queue; |
e687ad60 | 1845 | #ifdef CONFIG_NETFILTER_INGRESS |
960632ec | 1846 | struct nf_hook_entries __rcu *nf_hooks_ingress; |
e687ad60 | 1847 | #endif |
d2788d34 | 1848 | |
536721b1 | 1849 | unsigned char broadcast[MAX_ADDR_LEN]; |
14ffbbb8 TG |
1850 | #ifdef CONFIG_RFS_ACCEL |
1851 | struct cpu_rmap *rx_cpu_rmap; | |
1852 | #endif | |
1853 | struct hlist_node index_hlist; | |
cd13539b ED |
1854 | |
1855 | /* | |
1856 | * Cache lines mostly used on transmit path | |
1857 | */ | |
e8a0464c DM |
1858 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
1859 | unsigned int num_tx_queues; | |
fd2ea0a7 | 1860 | unsigned int real_num_tx_queues; |
af356afa | 1861 | struct Qdisc *qdisc; |
59cc1f61 JK |
1862 | #ifdef CONFIG_NET_SCHED |
1863 | DECLARE_HASHTABLE (qdisc_hash, 4); | |
1864 | #endif | |
0cd29503 | 1865 | unsigned int tx_queue_len; |
c3f26a26 | 1866 | spinlock_t tx_global_lock; |
14ffbbb8 | 1867 | int watchdog_timeo; |
cd13539b | 1868 | |
bf264145 | 1869 | #ifdef CONFIG_XPS |
a4177869 | 1870 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1871 | #endif |
1f211a1b | 1872 | #ifdef CONFIG_NET_CLS_ACT |
46209401 | 1873 | struct mini_Qdisc __rcu *miniq_egress; |
1f211a1b | 1874 | #endif |
0c4f691f | 1875 | |
9356b8fc | 1876 | /* These may be needed for future network-power-down code. */ |
9356b8fc ED |
1877 | struct timer_list watchdog_timer; |
1878 | ||
29b4433d | 1879 | int __percpu *pcpu_refcnt; |
1da177e4 | 1880 | struct list_head todo_list; |
1da177e4 | 1881 | |
e014debe | 1882 | struct list_head link_watch_list; |
572a103d | 1883 | |
1da177e4 | 1884 | enum { NETREG_UNINITIALIZED=0, |
b17a7c17 | 1885 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1886 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1887 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1888 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1889 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1890 | } reg_state:8; |
1891 | ||
536721b1 | 1892 | bool dismantle; |
a2835763 PM |
1893 | |
1894 | enum { | |
1895 | RTNL_LINK_INITIALIZED, | |
1896 | RTNL_LINK_INITIALIZING, | |
1897 | } rtnl_link_state:16; | |
1da177e4 | 1898 | |
cf124db5 DM |
1899 | bool needs_free_netdev; |
1900 | void (*priv_destructor)(struct net_device *dev); | |
1da177e4 | 1901 | |
1da177e4 | 1902 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1903 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1904 | #endif |
eae792b7 | 1905 | |
0c5c9fb5 | 1906 | possible_net_t nd_net; |
4a1c5371 | 1907 | |
4951704b | 1908 | /* mid-layer private */ |
a7855c78 | 1909 | union { |
536721b1 KK |
1910 | void *ml_priv; |
1911 | struct pcpu_lstats __percpu *lstats; | |
8f84985f | 1912 | struct pcpu_sw_netstats __percpu *tstats; |
536721b1 KK |
1913 | struct pcpu_dstats __percpu *dstats; |
1914 | struct pcpu_vstats __percpu *vstats; | |
a7855c78 | 1915 | }; |
536721b1 | 1916 | |
fb585b44 | 1917 | #if IS_ENABLED(CONFIG_GARP) |
3cc77ec7 | 1918 | struct garp_port __rcu *garp_port; |
fb585b44 TK |
1919 | #endif |
1920 | #if IS_ENABLED(CONFIG_MRP) | |
febf018d | 1921 | struct mrp_port __rcu *mrp_port; |
fb585b44 | 1922 | #endif |
1da177e4 | 1923 | |
5e82b4b2 | 1924 | struct device dev; |
0c509a6c | 1925 | const struct attribute_group *sysfs_groups[4]; |
a953be53 | 1926 | const struct attribute_group *sysfs_rx_queue_group; |
38f7b870 | 1927 | |
38f7b870 | 1928 | const struct rtnl_link_ops *rtnl_link_ops; |
f25f4e44 | 1929 | |
82cc1a7a PWJ |
1930 | /* for setting kernel sock attribute on TCP connection setup */ |
1931 | #define GSO_MAX_SIZE 65536 | |
1932 | unsigned int gso_max_size; | |
30b678d8 BH |
1933 | #define GSO_MAX_SEGS 65535 |
1934 | u16 gso_max_segs; | |
743b03a8 | 1935 | |
7a6b6f51 | 1936 | #ifdef CONFIG_DCB |
32953543 | 1937 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1938 | #endif |
5e82b4b2 BH |
1939 | u8 num_tc; |
1940 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1941 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1942 | |
d11ead75 | 1943 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 | 1944 | unsigned int fcoe_ddp_xid; |
5bc1421e | 1945 | #endif |
86f8515f | 1946 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 1947 | struct netprio_map __rcu *priomap; |
4d288d57 | 1948 | #endif |
5e82b4b2 | 1949 | struct phy_device *phydev; |
e679c9c1 | 1950 | struct sfp_bus *sfp_bus; |
5e82b4b2 | 1951 | struct lock_class_key *qdisc_tx_busylock; |
f9eb8aea | 1952 | struct lock_class_key *qdisc_running_key; |
5e82b4b2 | 1953 | bool proto_down; |
1da177e4 | 1954 | }; |
43cb76d9 | 1955 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 | 1956 | |
b5cdae32 DM |
1957 | static inline bool netif_elide_gro(const struct net_device *dev) |
1958 | { | |
1959 | if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog) | |
1960 | return true; | |
1961 | return false; | |
1962 | } | |
1963 | ||
1da177e4 | 1964 | #define NETDEV_ALIGN 32 |
1da177e4 | 1965 | |
4f57c087 JF |
1966 | static inline |
1967 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1968 | { | |
1969 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1970 | } | |
1971 | ||
1972 | static inline | |
1973 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1974 | { | |
1975 | if (tc >= dev->num_tc) | |
1976 | return -EINVAL; | |
1977 | ||
1978 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1979 | return 0; | |
1980 | } | |
1981 | ||
8d059b0f | 1982 | int netdev_txq_to_tc(struct net_device *dev, unsigned int txq); |
9cf1f6a8 AD |
1983 | void netdev_reset_tc(struct net_device *dev); |
1984 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset); | |
1985 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc); | |
4f57c087 JF |
1986 | |
1987 | static inline | |
1988 | int netdev_get_num_tc(struct net_device *dev) | |
1989 | { | |
1990 | return dev->num_tc; | |
1991 | } | |
1992 | ||
e8a0464c DM |
1993 | static inline |
1994 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1995 | unsigned int index) | |
1996 | { | |
1997 | return &dev->_tx[index]; | |
1998 | } | |
1999 | ||
10c51b56 DB |
2000 | static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
2001 | const struct sk_buff *skb) | |
2002 | { | |
2003 | return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); | |
2004 | } | |
2005 | ||
e8a0464c DM |
2006 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
2007 | void (*f)(struct net_device *, | |
2008 | struct netdev_queue *, | |
2009 | void *), | |
2010 | void *arg) | |
2011 | { | |
2012 | unsigned int i; | |
2013 | ||
2014 | for (i = 0; i < dev->num_tx_queues; i++) | |
2015 | f(dev, &dev->_tx[i], arg); | |
2016 | } | |
2017 | ||
d3fff6c4 ED |
2018 | #define netdev_lockdep_set_classes(dev) \ |
2019 | { \ | |
2020 | static struct lock_class_key qdisc_tx_busylock_key; \ | |
2021 | static struct lock_class_key qdisc_running_key; \ | |
2022 | static struct lock_class_key qdisc_xmit_lock_key; \ | |
2023 | static struct lock_class_key dev_addr_list_lock_key; \ | |
2024 | unsigned int i; \ | |
2025 | \ | |
2026 | (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \ | |
2027 | (dev)->qdisc_running_key = &qdisc_running_key; \ | |
2028 | lockdep_set_class(&(dev)->addr_list_lock, \ | |
2029 | &dev_addr_list_lock_key); \ | |
2030 | for (i = 0; i < (dev)->num_tx_queues; i++) \ | |
2031 | lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \ | |
2032 | &qdisc_xmit_lock_key); \ | |
2033 | } | |
2034 | ||
f629d208 | 2035 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
f663dd9a JW |
2036 | struct sk_buff *skb, |
2037 | void *accel_priv); | |
8c4c49df | 2038 | |
871b642a PA |
2039 | /* returns the headroom that the master device needs to take in account |
2040 | * when forwarding to this dev | |
2041 | */ | |
2042 | static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) | |
2043 | { | |
2044 | return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; | |
2045 | } | |
2046 | ||
2047 | static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) | |
2048 | { | |
2049 | if (dev->netdev_ops->ndo_set_rx_headroom) | |
2050 | dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); | |
2051 | } | |
2052 | ||
2053 | /* set the device rx headroom to the dev's default */ | |
2054 | static inline void netdev_reset_rx_headroom(struct net_device *dev) | |
2055 | { | |
2056 | netdev_set_rx_headroom(dev, -1); | |
2057 | } | |
2058 | ||
c346dca1 YH |
2059 | /* |
2060 | * Net namespace inlines | |
2061 | */ | |
2062 | static inline | |
2063 | struct net *dev_net(const struct net_device *dev) | |
2064 | { | |
c2d9ba9b | 2065 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
2066 | } |
2067 | ||
2068 | static inline | |
f5aa23fd | 2069 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 | 2070 | { |
0c5c9fb5 | 2071 | write_pnet(&dev->nd_net, net); |
c346dca1 YH |
2072 | } |
2073 | ||
bea3348e SH |
2074 | /** |
2075 | * netdev_priv - access network device private data | |
2076 | * @dev: network device | |
2077 | * | |
2078 | * Get network device private data | |
2079 | */ | |
6472ce60 | 2080 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 2081 | { |
1ce8e7b5 | 2082 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
2083 | } |
2084 | ||
1da177e4 LT |
2085 | /* Set the sysfs physical device reference for the network logical device |
2086 | * if set prior to registration will cause a symlink during initialization. | |
2087 | */ | |
43cb76d9 | 2088 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 2089 | |
384912ed | 2090 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 2091 | * fine-grained identification of different network device types. For |
5e82b4b2 | 2092 | * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. |
384912ed MH |
2093 | */ |
2094 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
2095 | ||
82dc3c63 ED |
2096 | /* Default NAPI poll() weight |
2097 | * Device drivers are strongly advised to not use bigger value | |
2098 | */ | |
2099 | #define NAPI_POLL_WEIGHT 64 | |
2100 | ||
3b582cc1 | 2101 | /** |
5e82b4b2 | 2102 | * netif_napi_add - initialize a NAPI context |
3b582cc1 | 2103 | * @dev: network device |
5e82b4b2 | 2104 | * @napi: NAPI context |
3b582cc1 SH |
2105 | * @poll: polling function |
2106 | * @weight: default weight | |
2107 | * | |
5e82b4b2 BH |
2108 | * netif_napi_add() must be used to initialize a NAPI context prior to calling |
2109 | * *any* of the other NAPI-related functions. | |
3b582cc1 | 2110 | */ |
d565b0a1 HX |
2111 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
2112 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 2113 | |
d64b5e85 | 2114 | /** |
5e82b4b2 | 2115 | * netif_tx_napi_add - initialize a NAPI context |
d64b5e85 | 2116 | * @dev: network device |
5e82b4b2 | 2117 | * @napi: NAPI context |
d64b5e85 ED |
2118 | * @poll: polling function |
2119 | * @weight: default weight | |
2120 | * | |
2121 | * This variant of netif_napi_add() should be used from drivers using NAPI | |
2122 | * to exclusively poll a TX queue. | |
2123 | * This will avoid we add it into napi_hash[], thus polluting this hash table. | |
2124 | */ | |
2125 | static inline void netif_tx_napi_add(struct net_device *dev, | |
2126 | struct napi_struct *napi, | |
2127 | int (*poll)(struct napi_struct *, int), | |
2128 | int weight) | |
2129 | { | |
2130 | set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); | |
2131 | netif_napi_add(dev, napi, poll, weight); | |
2132 | } | |
2133 | ||
d8156534 | 2134 | /** |
5e82b4b2 BH |
2135 | * netif_napi_del - remove a NAPI context |
2136 | * @napi: NAPI context | |
d8156534 | 2137 | * |
5e82b4b2 | 2138 | * netif_napi_del() removes a NAPI context from the network device NAPI list |
d8156534 | 2139 | */ |
d565b0a1 HX |
2140 | void netif_napi_del(struct napi_struct *napi); |
2141 | ||
2142 | struct napi_gro_cb { | |
78a478d0 | 2143 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
5e82b4b2 | 2144 | void *frag0; |
78a478d0 | 2145 | |
7489594c HX |
2146 | /* Length of frag0. */ |
2147 | unsigned int frag0_len; | |
2148 | ||
86911732 | 2149 | /* This indicates where we are processing relative to skb->data. */ |
5e82b4b2 | 2150 | int data_offset; |
86911732 | 2151 | |
d565b0a1 | 2152 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
2153 | u16 flush; |
2154 | ||
2155 | /* Save the IP ID here and check when we get to the transport layer */ | |
2156 | u16 flush_id; | |
d565b0a1 HX |
2157 | |
2158 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
2159 | u16 count; |
2160 | ||
15e2396d TH |
2161 | /* Start offset for remote checksum offload */ |
2162 | u16 gro_remcsum_start; | |
2163 | ||
2e71a6f8 ED |
2164 | /* jiffies when first packet was created/queued */ |
2165 | unsigned long age; | |
86347245 | 2166 | |
afe93325 | 2167 | /* Used in ipv6_gro_receive() and foo-over-udp */ |
b582ef09 OG |
2168 | u16 proto; |
2169 | ||
baa32ff4 TH |
2170 | /* This is non-zero if the packet may be of the same flow. */ |
2171 | u8 same_flow:1; | |
2172 | ||
fac8e0f5 JG |
2173 | /* Used in tunnel GRO receive */ |
2174 | u8 encap_mark:1; | |
573e8fca TH |
2175 | |
2176 | /* GRO checksum is valid */ | |
2177 | u8 csum_valid:1; | |
2178 | ||
662880f4 TH |
2179 | /* Number of checksums via CHECKSUM_UNNECESSARY */ |
2180 | u8 csum_cnt:3; | |
c3c7c254 | 2181 | |
baa32ff4 TH |
2182 | /* Free the skb? */ |
2183 | u8 free:2; | |
2184 | #define NAPI_GRO_FREE 1 | |
2185 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2186 | ||
efc98d08 TH |
2187 | /* Used in foo-over-udp, set in udp[46]_gro_receive */ |
2188 | u8 is_ipv6:1; | |
2189 | ||
a0ca153f AD |
2190 | /* Used in GRE, set in fou/gue_gro_receive */ |
2191 | u8 is_fou:1; | |
2192 | ||
1530545e AD |
2193 | /* Used to determine if flush_id can be ignored */ |
2194 | u8 is_atomic:1; | |
2195 | ||
fcd91dd4 SD |
2196 | /* Number of gro_receive callbacks this packet already went through */ |
2197 | u8 recursion_counter:4; | |
2198 | ||
2199 | /* 1 bit hole */ | |
baa32ff4 | 2200 | |
bf5a755f JC |
2201 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
2202 | __wsum csum; | |
2203 | ||
c3c7c254 ED |
2204 | /* used in skb_gro_receive() slow path */ |
2205 | struct sk_buff *last; | |
d565b0a1 HX |
2206 | }; |
2207 | ||
2208 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 2209 | |
fcd91dd4 SD |
2210 | #define GRO_RECURSION_LIMIT 15 |
2211 | static inline int gro_recursion_inc_test(struct sk_buff *skb) | |
2212 | { | |
2213 | return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT; | |
2214 | } | |
2215 | ||
2216 | typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *); | |
2217 | static inline struct sk_buff **call_gro_receive(gro_receive_t cb, | |
2218 | struct sk_buff **head, | |
2219 | struct sk_buff *skb) | |
2220 | { | |
2221 | if (unlikely(gro_recursion_inc_test(skb))) { | |
2222 | NAPI_GRO_CB(skb)->flush |= 1; | |
2223 | return NULL; | |
2224 | } | |
2225 | ||
2226 | return cb(head, skb); | |
2227 | } | |
2228 | ||
2229 | typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **, | |
2230 | struct sk_buff *); | |
2231 | static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb, | |
2232 | struct sock *sk, | |
2233 | struct sk_buff **head, | |
2234 | struct sk_buff *skb) | |
2235 | { | |
2236 | if (unlikely(gro_recursion_inc_test(skb))) { | |
2237 | NAPI_GRO_CB(skb)->flush |= 1; | |
2238 | return NULL; | |
2239 | } | |
2240 | ||
2241 | return cb(sk, head, skb); | |
2242 | } | |
2243 | ||
1da177e4 | 2244 | struct packet_type { |
f2ccd8fa DM |
2245 | __be16 type; /* This is really htons(ether_type). */ |
2246 | struct net_device *dev; /* NULL is wildcarded here */ | |
2247 | int (*func) (struct sk_buff *, | |
2248 | struct net_device *, | |
2249 | struct packet_type *, | |
2250 | struct net_device *); | |
c0de08d0 EL |
2251 | bool (*id_match)(struct packet_type *ptype, |
2252 | struct sock *sk); | |
1da177e4 LT |
2253 | void *af_packet_priv; |
2254 | struct list_head list; | |
2255 | }; | |
2256 | ||
f191a1d1 | 2257 | struct offload_callbacks { |
576a30eb | 2258 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 2259 | netdev_features_t features); |
d565b0a1 | 2260 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
a2b12f3c | 2261 | struct sk_buff *skb); |
299603e8 | 2262 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
2263 | }; |
2264 | ||
2265 | struct packet_offload { | |
2266 | __be16 type; /* This is really htons(ether_type). */ | |
bdef7de4 | 2267 | u16 priority; |
f191a1d1 VY |
2268 | struct offload_callbacks callbacks; |
2269 | struct list_head list; | |
1da177e4 LT |
2270 | }; |
2271 | ||
5e82b4b2 | 2272 | /* often modified stats are per-CPU, other are shared (netdev->stats) */ |
8f84985f LR |
2273 | struct pcpu_sw_netstats { |
2274 | u64 rx_packets; | |
2275 | u64 rx_bytes; | |
2276 | u64 tx_packets; | |
2277 | u64 tx_bytes; | |
2278 | struct u64_stats_sync syncp; | |
2279 | }; | |
2280 | ||
aabc92bb PNA |
2281 | #define __netdev_alloc_pcpu_stats(type, gfp) \ |
2282 | ({ \ | |
2283 | typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ | |
2284 | if (pcpu_stats) { \ | |
2285 | int __cpu; \ | |
2286 | for_each_possible_cpu(__cpu) { \ | |
2287 | typeof(type) *stat; \ | |
2288 | stat = per_cpu_ptr(pcpu_stats, __cpu); \ | |
2289 | u64_stats_init(&stat->syncp); \ | |
2290 | } \ | |
2291 | } \ | |
2292 | pcpu_stats; \ | |
1c213bd2 WC |
2293 | }) |
2294 | ||
aabc92bb | 2295 | #define netdev_alloc_pcpu_stats(type) \ |
326fcfa5 | 2296 | __netdev_alloc_pcpu_stats(type, GFP_KERNEL) |
aabc92bb | 2297 | |
764f5e54 JP |
2298 | enum netdev_lag_tx_type { |
2299 | NETDEV_LAG_TX_TYPE_UNKNOWN, | |
2300 | NETDEV_LAG_TX_TYPE_RANDOM, | |
2301 | NETDEV_LAG_TX_TYPE_BROADCAST, | |
2302 | NETDEV_LAG_TX_TYPE_ROUNDROBIN, | |
2303 | NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, | |
2304 | NETDEV_LAG_TX_TYPE_HASH, | |
2305 | }; | |
2306 | ||
2307 | struct netdev_lag_upper_info { | |
2308 | enum netdev_lag_tx_type tx_type; | |
2309 | }; | |
2310 | ||
fb1b2e3c JP |
2311 | struct netdev_lag_lower_state_info { |
2312 | u8 link_up : 1, | |
2313 | tx_enabled : 1; | |
2314 | }; | |
2315 | ||
1da177e4 LT |
2316 | #include <linux/notifier.h> |
2317 | ||
ede2762d KT |
2318 | /* netdevice notifier chain. Please remember to update netdev_cmd_to_name() |
2319 | * and the rtnetlink notification exclusion list in rtnetlink_event() when | |
2320 | * adding new types. | |
dcfe1421 | 2321 | */ |
ede2762d KT |
2322 | enum netdev_cmd { |
2323 | NETDEV_UP = 1, /* For now you can't veto a device up/down */ | |
2324 | NETDEV_DOWN, | |
2325 | NETDEV_REBOOT, /* Tell a protocol stack a network interface | |
dcfe1421 AW |
2326 | detected a hardware crash and restarted |
2327 | - we can use this eg to kick tcp sessions | |
2328 | once done */ | |
ede2762d KT |
2329 | NETDEV_CHANGE, /* Notify device state change */ |
2330 | NETDEV_REGISTER, | |
2331 | NETDEV_UNREGISTER, | |
2332 | NETDEV_CHANGEMTU, /* notify after mtu change happened */ | |
2333 | NETDEV_CHANGEADDR, | |
2334 | NETDEV_GOING_DOWN, | |
2335 | NETDEV_CHANGENAME, | |
2336 | NETDEV_FEAT_CHANGE, | |
2337 | NETDEV_BONDING_FAILOVER, | |
2338 | NETDEV_PRE_UP, | |
2339 | NETDEV_PRE_TYPE_CHANGE, | |
2340 | NETDEV_POST_TYPE_CHANGE, | |
2341 | NETDEV_POST_INIT, | |
ede2762d KT |
2342 | NETDEV_RELEASE, |
2343 | NETDEV_NOTIFY_PEERS, | |
2344 | NETDEV_JOIN, | |
2345 | NETDEV_CHANGEUPPER, | |
2346 | NETDEV_RESEND_IGMP, | |
2347 | NETDEV_PRECHANGEMTU, /* notify before mtu change happened */ | |
2348 | NETDEV_CHANGEINFODATA, | |
2349 | NETDEV_BONDING_INFO, | |
2350 | NETDEV_PRECHANGEUPPER, | |
2351 | NETDEV_CHANGELOWERSTATE, | |
2352 | NETDEV_UDP_TUNNEL_PUSH_INFO, | |
2353 | NETDEV_UDP_TUNNEL_DROP_INFO, | |
2354 | NETDEV_CHANGE_TX_QUEUE_LEN, | |
9daae9bd GP |
2355 | NETDEV_CVLAN_FILTER_PUSH_INFO, |
2356 | NETDEV_CVLAN_FILTER_DROP_INFO, | |
2357 | NETDEV_SVLAN_FILTER_PUSH_INFO, | |
2358 | NETDEV_SVLAN_FILTER_DROP_INFO, | |
ede2762d KT |
2359 | }; |
2360 | const char *netdev_cmd_to_name(enum netdev_cmd cmd); | |
dcfe1421 | 2361 | |
f629d208 JP |
2362 | int register_netdevice_notifier(struct notifier_block *nb); |
2363 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
2364 | |
2365 | struct netdev_notifier_info { | |
51d0c047 DA |
2366 | struct net_device *dev; |
2367 | struct netlink_ext_ack *extack; | |
351638e7 JP |
2368 | }; |
2369 | ||
be9efd36 JP |
2370 | struct netdev_notifier_change_info { |
2371 | struct netdev_notifier_info info; /* must be first */ | |
2372 | unsigned int flags_changed; | |
2373 | }; | |
2374 | ||
0e4ead9d JP |
2375 | struct netdev_notifier_changeupper_info { |
2376 | struct netdev_notifier_info info; /* must be first */ | |
2377 | struct net_device *upper_dev; /* new upper dev */ | |
2378 | bool master; /* is upper dev master */ | |
5e82b4b2 | 2379 | bool linking; /* is the notification for link or unlink */ |
29bf24af | 2380 | void *upper_info; /* upper dev info */ |
0e4ead9d JP |
2381 | }; |
2382 | ||
04d48266 JP |
2383 | struct netdev_notifier_changelowerstate_info { |
2384 | struct netdev_notifier_info info; /* must be first */ | |
2385 | void *lower_state_info; /* is lower dev state */ | |
2386 | }; | |
2387 | ||
75538c2b CW |
2388 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
2389 | struct net_device *dev) | |
2390 | { | |
2391 | info->dev = dev; | |
51d0c047 | 2392 | info->extack = NULL; |
75538c2b CW |
2393 | } |
2394 | ||
351638e7 JP |
2395 | static inline struct net_device * |
2396 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
2397 | { | |
2398 | return info->dev; | |
2399 | } | |
2400 | ||
51d0c047 DA |
2401 | static inline struct netlink_ext_ack * |
2402 | netdev_notifier_info_to_extack(const struct netdev_notifier_info *info) | |
2403 | { | |
2404 | return info->extack; | |
2405 | } | |
2406 | ||
f629d208 | 2407 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
2408 | |
2409 | ||
1da177e4 LT |
2410 | extern rwlock_t dev_base_lock; /* Device list lock */ |
2411 | ||
881d966b EB |
2412 | #define for_each_netdev(net, d) \ |
2413 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
2414 | #define for_each_netdev_reverse(net, d) \ |
2415 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
2416 | #define for_each_netdev_rcu(net, d) \ |
2417 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
2418 | #define for_each_netdev_safe(net, d, n) \ |
2419 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
2420 | #define for_each_netdev_continue(net, d) \ | |
2421 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 2422 | #define for_each_netdev_continue_rcu(net, d) \ |
2423 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 2424 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
2425 | for_each_netdev_rcu(&init_net, slave) \ | |
4ccce02e | 2426 | if (netdev_master_upper_dev_get_rcu(slave) == (bond)) |
881d966b | 2427 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 2428 | |
a050c33f DL |
2429 | static inline struct net_device *next_net_device(struct net_device *dev) |
2430 | { | |
2431 | struct list_head *lh; | |
2432 | struct net *net; | |
2433 | ||
c346dca1 | 2434 | net = dev_net(dev); |
a050c33f DL |
2435 | lh = dev->dev_list.next; |
2436 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2437 | } | |
2438 | ||
ce81b76a ED |
2439 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
2440 | { | |
2441 | struct list_head *lh; | |
2442 | struct net *net; | |
2443 | ||
2444 | net = dev_net(dev); | |
ccf43438 | 2445 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
2446 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2447 | } | |
2448 | ||
a050c33f DL |
2449 | static inline struct net_device *first_net_device(struct net *net) |
2450 | { | |
2451 | return list_empty(&net->dev_base_head) ? NULL : | |
2452 | net_device_entry(net->dev_base_head.next); | |
2453 | } | |
7562f876 | 2454 | |
ccf43438 ED |
2455 | static inline struct net_device *first_net_device_rcu(struct net *net) |
2456 | { | |
2457 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
2458 | ||
2459 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2460 | } | |
2461 | ||
f629d208 JP |
2462 | int netdev_boot_setup_check(struct net_device *dev); |
2463 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
2464 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
2465 | const char *hwaddr); | |
2466 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2467 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2468 | void dev_add_pack(struct packet_type *pt); | |
2469 | void dev_remove_pack(struct packet_type *pt); | |
2470 | void __dev_remove_pack(struct packet_type *pt); | |
2471 | void dev_add_offload(struct packet_offload *po); | |
2472 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 | 2473 | |
a54acb3a | 2474 | int dev_get_iflink(const struct net_device *dev); |
fc4099f1 | 2475 | int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); |
6c555490 WC |
2476 | struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
2477 | unsigned short mask); | |
f629d208 JP |
2478 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
2479 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
2480 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
2481 | int dev_alloc_name(struct net_device *dev, const char *name); | |
2482 | int dev_open(struct net_device *dev); | |
7051b88a | 2483 | void dev_close(struct net_device *dev); |
2484 | void dev_close_many(struct list_head *head, bool unlink); | |
f629d208 | 2485 | void dev_disable_lro(struct net_device *dev); |
0c4b51f0 | 2486 | int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); |
2b4aa3ce | 2487 | int dev_queue_xmit(struct sk_buff *skb); |
f663dd9a | 2488 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
f629d208 JP |
2489 | int register_netdevice(struct net_device *dev); |
2490 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
2491 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
2492 | static inline void unregister_netdevice(struct net_device *dev) |
2493 | { | |
2494 | unregister_netdevice_queue(dev, NULL); | |
2495 | } | |
2496 | ||
f629d208 JP |
2497 | int netdev_refcnt_read(const struct net_device *dev); |
2498 | void free_netdev(struct net_device *dev); | |
74d332c1 | 2499 | void netdev_freemem(struct net_device *dev); |
f629d208 JP |
2500 | void synchronize_net(void); |
2501 | int init_dummy_netdev(struct net_device *dev); | |
937f1ba5 | 2502 | |
f60e5990 | 2503 | DECLARE_PER_CPU(int, xmit_recursion); |
a70b506e DB |
2504 | #define XMIT_RECURSION_LIMIT 10 |
2505 | ||
f60e5990 | 2506 | static inline int dev_recursion_level(void) |
2507 | { | |
2508 | return this_cpu_read(xmit_recursion); | |
2509 | } | |
2510 | ||
f629d208 JP |
2511 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
2512 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
2513 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
90b602f8 | 2514 | struct net_device *dev_get_by_napi_id(unsigned int napi_id); |
f629d208 JP |
2515 | int netdev_get_name(struct net *net, char *name, int ifindex); |
2516 | int dev_restart(struct net_device *dev); | |
f629d208 | 2517 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
86911732 HX |
2518 | |
2519 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
2520 | { | |
2521 | return NAPI_GRO_CB(skb)->data_offset; | |
2522 | } | |
2523 | ||
2524 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
2525 | { | |
2526 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
2527 | } | |
2528 | ||
2529 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
2530 | { | |
2531 | NAPI_GRO_CB(skb)->data_offset += len; | |
2532 | } | |
2533 | ||
a5b1cf28 HX |
2534 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
2535 | unsigned int offset) | |
86911732 | 2536 | { |
a5b1cf28 HX |
2537 | return NAPI_GRO_CB(skb)->frag0 + offset; |
2538 | } | |
78a478d0 | 2539 | |
a5b1cf28 HX |
2540 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
2541 | { | |
2542 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2543 | } | |
78a478d0 | 2544 | |
57ea52a8 HX |
2545 | static inline void skb_gro_frag0_invalidate(struct sk_buff *skb) |
2546 | { | |
2547 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
2548 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
2549 | } | |
2550 | ||
a5b1cf28 HX |
2551 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2552 | unsigned int offset) | |
2553 | { | |
17dd759c HX |
2554 | if (!pskb_may_pull(skb, hlen)) |
2555 | return NULL; | |
2556 | ||
57ea52a8 | 2557 | skb_gro_frag0_invalidate(skb); |
17dd759c | 2558 | return skb->data + offset; |
86911732 | 2559 | } |
1da177e4 | 2560 | |
36e7b1b8 HX |
2561 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2562 | { | |
78d3fd0b HX |
2563 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2564 | skb_network_offset(skb); | |
36e7b1b8 HX |
2565 | } |
2566 | ||
bf5a755f JC |
2567 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2568 | const void *start, unsigned int len) | |
2569 | { | |
573e8fca | 2570 | if (NAPI_GRO_CB(skb)->csum_valid) |
bf5a755f JC |
2571 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, |
2572 | csum_partial(start, len, 0)); | |
2573 | } | |
2574 | ||
573e8fca TH |
2575 | /* GRO checksum functions. These are logical equivalents of the normal |
2576 | * checksum functions (in skbuff.h) except that they operate on the GRO | |
2577 | * offsets and fields in sk_buff. | |
2578 | */ | |
2579 | ||
2580 | __sum16 __skb_gro_checksum_complete(struct sk_buff *skb); | |
2581 | ||
15e2396d TH |
2582 | static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb) |
2583 | { | |
b7fe10e5 | 2584 | return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb)); |
15e2396d TH |
2585 | } |
2586 | ||
573e8fca TH |
2587 | static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, |
2588 | bool zero_okay, | |
2589 | __sum16 check) | |
2590 | { | |
6edec0e6 TH |
2591 | return ((skb->ip_summed != CHECKSUM_PARTIAL || |
2592 | skb_checksum_start_offset(skb) < | |
2593 | skb_gro_offset(skb)) && | |
15e2396d | 2594 | !skb_at_gro_remcsum_start(skb) && |
662880f4 | 2595 | NAPI_GRO_CB(skb)->csum_cnt == 0 && |
573e8fca TH |
2596 | (!zero_okay || check)); |
2597 | } | |
2598 | ||
2599 | static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, | |
2600 | __wsum psum) | |
2601 | { | |
2602 | if (NAPI_GRO_CB(skb)->csum_valid && | |
2603 | !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum))) | |
2604 | return 0; | |
2605 | ||
2606 | NAPI_GRO_CB(skb)->csum = psum; | |
2607 | ||
2608 | return __skb_gro_checksum_complete(skb); | |
2609 | } | |
2610 | ||
573e8fca TH |
2611 | static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) |
2612 | { | |
662880f4 TH |
2613 | if (NAPI_GRO_CB(skb)->csum_cnt > 0) { |
2614 | /* Consume a checksum from CHECKSUM_UNNECESSARY */ | |
2615 | NAPI_GRO_CB(skb)->csum_cnt--; | |
2616 | } else { | |
2617 | /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we | |
2618 | * verified a new top level checksum or an encapsulated one | |
2619 | * during GRO. This saves work if we fallback to normal path. | |
2620 | */ | |
2621 | __skb_incr_checksum_unnecessary(skb); | |
573e8fca TH |
2622 | } |
2623 | } | |
2624 | ||
2625 | #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \ | |
2626 | compute_pseudo) \ | |
2627 | ({ \ | |
2628 | __sum16 __ret = 0; \ | |
2629 | if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \ | |
2630 | __ret = __skb_gro_checksum_validate_complete(skb, \ | |
2631 | compute_pseudo(skb, proto)); \ | |
219f1d79 | 2632 | if (!__ret) \ |
573e8fca TH |
2633 | skb_gro_incr_csum_unnecessary(skb); \ |
2634 | __ret; \ | |
2635 | }) | |
2636 | ||
2637 | #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \ | |
2638 | __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo) | |
2639 | ||
2640 | #define skb_gro_checksum_validate_zero_check(skb, proto, check, \ | |
2641 | compute_pseudo) \ | |
2642 | __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo) | |
2643 | ||
2644 | #define skb_gro_checksum_simple_validate(skb) \ | |
2645 | __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo) | |
2646 | ||
d96535a1 TH |
2647 | static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb) |
2648 | { | |
2649 | return (NAPI_GRO_CB(skb)->csum_cnt == 0 && | |
2650 | !NAPI_GRO_CB(skb)->csum_valid); | |
2651 | } | |
2652 | ||
2653 | static inline void __skb_gro_checksum_convert(struct sk_buff *skb, | |
2654 | __sum16 check, __wsum pseudo) | |
2655 | { | |
2656 | NAPI_GRO_CB(skb)->csum = ~pseudo; | |
2657 | NAPI_GRO_CB(skb)->csum_valid = 1; | |
2658 | } | |
2659 | ||
2660 | #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \ | |
2661 | do { \ | |
2662 | if (__skb_gro_checksum_convert_check(skb)) \ | |
2663 | __skb_gro_checksum_convert(skb, check, \ | |
2664 | compute_pseudo(skb, proto)); \ | |
2665 | } while (0) | |
2666 | ||
26c4f7da TH |
2667 | struct gro_remcsum { |
2668 | int offset; | |
2669 | __wsum delta; | |
2670 | }; | |
2671 | ||
2672 | static inline void skb_gro_remcsum_init(struct gro_remcsum *grc) | |
2673 | { | |
846cd667 | 2674 | grc->offset = 0; |
26c4f7da TH |
2675 | grc->delta = 0; |
2676 | } | |
2677 | ||
b7fe10e5 TH |
2678 | static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, |
2679 | unsigned int off, size_t hdrlen, | |
2680 | int start, int offset, | |
2681 | struct gro_remcsum *grc, | |
2682 | bool nopartial) | |
dcdc8994 TH |
2683 | { |
2684 | __wsum delta; | |
b7fe10e5 | 2685 | size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start); |
dcdc8994 TH |
2686 | |
2687 | BUG_ON(!NAPI_GRO_CB(skb)->csum_valid); | |
2688 | ||
15e2396d | 2689 | if (!nopartial) { |
b7fe10e5 TH |
2690 | NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start; |
2691 | return ptr; | |
2692 | } | |
2693 | ||
2694 | ptr = skb_gro_header_fast(skb, off); | |
2695 | if (skb_gro_header_hard(skb, off + plen)) { | |
2696 | ptr = skb_gro_header_slow(skb, off + plen, off); | |
2697 | if (!ptr) | |
2698 | return NULL; | |
15e2396d TH |
2699 | } |
2700 | ||
b7fe10e5 TH |
2701 | delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum, |
2702 | start, offset); | |
dcdc8994 TH |
2703 | |
2704 | /* Adjust skb->csum since we changed the packet */ | |
dcdc8994 | 2705 | NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); |
26c4f7da | 2706 | |
b7fe10e5 | 2707 | grc->offset = off + hdrlen + offset; |
26c4f7da | 2708 | grc->delta = delta; |
b7fe10e5 TH |
2709 | |
2710 | return ptr; | |
dcdc8994 TH |
2711 | } |
2712 | ||
26c4f7da TH |
2713 | static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, |
2714 | struct gro_remcsum *grc) | |
2715 | { | |
b7fe10e5 TH |
2716 | void *ptr; |
2717 | size_t plen = grc->offset + sizeof(u16); | |
2718 | ||
26c4f7da TH |
2719 | if (!grc->delta) |
2720 | return; | |
2721 | ||
b7fe10e5 TH |
2722 | ptr = skb_gro_header_fast(skb, grc->offset); |
2723 | if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) { | |
2724 | ptr = skb_gro_header_slow(skb, plen, grc->offset); | |
2725 | if (!ptr) | |
2726 | return; | |
2727 | } | |
2728 | ||
2729 | remcsum_unadjust((__sum16 *)ptr, grc->delta); | |
26c4f7da | 2730 | } |
dcdc8994 | 2731 | |
25393d3f SK |
2732 | #ifdef CONFIG_XFRM_OFFLOAD |
2733 | static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush) | |
2734 | { | |
2735 | if (PTR_ERR(pp) != -EINPROGRESS) | |
2736 | NAPI_GRO_CB(skb)->flush |= flush; | |
2737 | } | |
2738 | #else | |
5f114163 SK |
2739 | static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush) |
2740 | { | |
2741 | NAPI_GRO_CB(skb)->flush |= flush; | |
2742 | } | |
25393d3f | 2743 | #endif |
5f114163 | 2744 | |
0c4e8581 SH |
2745 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
2746 | unsigned short type, | |
3b04ddde | 2747 | const void *daddr, const void *saddr, |
95c96174 | 2748 | unsigned int len) |
0c4e8581 | 2749 | { |
f1ecfd5d | 2750 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 2751 | return 0; |
3b04ddde SH |
2752 | |
2753 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
2754 | } |
2755 | ||
b95cce35 SH |
2756 | static inline int dev_parse_header(const struct sk_buff *skb, |
2757 | unsigned char *haddr) | |
2758 | { | |
2759 | const struct net_device *dev = skb->dev; | |
2760 | ||
1b83336b | 2761 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 2762 | return 0; |
3b04ddde | 2763 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
2764 | } |
2765 | ||
2793a23a WB |
2766 | /* ll_header must have at least hard_header_len allocated */ |
2767 | static inline bool dev_validate_header(const struct net_device *dev, | |
2768 | char *ll_header, int len) | |
2769 | { | |
2770 | if (likely(len >= dev->hard_header_len)) | |
2771 | return true; | |
217e6fa2 WB |
2772 | if (len < dev->min_header_len) |
2773 | return false; | |
2793a23a WB |
2774 | |
2775 | if (capable(CAP_SYS_RAWIO)) { | |
2776 | memset(ll_header + len, 0, dev->hard_header_len - len); | |
2777 | return true; | |
2778 | } | |
2779 | ||
2780 | if (dev->header_ops && dev->header_ops->validate) | |
2781 | return dev->header_ops->validate(ll_header, len); | |
2782 | ||
2783 | return false; | |
2784 | } | |
2785 | ||
36fd633e AV |
2786 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, |
2787 | int len, int size); | |
f629d208 | 2788 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
2789 | static inline int unregister_gifconf(unsigned int family) |
2790 | { | |
2791 | return register_gifconf(family, NULL); | |
2792 | } | |
2793 | ||
99bbc707 | 2794 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 2795 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
2796 | struct sd_flow_limit { |
2797 | u64 count; | |
2798 | unsigned int num_buckets; | |
2799 | unsigned int history_head; | |
2800 | u16 history[FLOW_LIMIT_HISTORY]; | |
2801 | u8 buckets[]; | |
2802 | }; | |
2803 | ||
2804 | extern int netdev_flow_limit_table_len; | |
2805 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
2806 | ||
1da177e4 | 2807 | /* |
5e82b4b2 | 2808 | * Incoming packets are placed on per-CPU queues |
1da177e4 | 2809 | */ |
d94d9fee | 2810 | struct softnet_data { |
1da177e4 | 2811 | struct list_head poll_list; |
6e7676c1 | 2812 | struct sk_buff_head process_queue; |
1da177e4 | 2813 | |
dee42870 | 2814 | /* stats */ |
cd7b5396 DM |
2815 | unsigned int processed; |
2816 | unsigned int time_squeeze; | |
cd7b5396 | 2817 | unsigned int received_rps; |
fd793d89 | 2818 | #ifdef CONFIG_RPS |
88751275 | 2819 | struct softnet_data *rps_ipi_list; |
4cdb1e2e ED |
2820 | #endif |
2821 | #ifdef CONFIG_NET_FLOW_LIMIT | |
2822 | struct sd_flow_limit __rcu *flow_limit; | |
2823 | #endif | |
2824 | struct Qdisc *output_queue; | |
2825 | struct Qdisc **output_queue_tailp; | |
2826 | struct sk_buff *completion_queue; | |
f53c7239 SK |
2827 | #ifdef CONFIG_XFRM_OFFLOAD |
2828 | struct sk_buff_head xfrm_backlog; | |
2829 | #endif | |
4cdb1e2e | 2830 | #ifdef CONFIG_RPS |
501e7ef5 ED |
2831 | /* input_queue_head should be written by cpu owning this struct, |
2832 | * and only read by other cpus. Worth using a cache line. | |
2833 | */ | |
2834 | unsigned int input_queue_head ____cacheline_aligned_in_smp; | |
2835 | ||
2836 | /* Elements below can be accessed between CPUs for RPS/RFS */ | |
966a9671 | 2837 | call_single_data_t csd ____cacheline_aligned_in_smp; |
88751275 ED |
2838 | struct softnet_data *rps_ipi_next; |
2839 | unsigned int cpu; | |
76cc8b13 | 2840 | unsigned int input_queue_tail; |
1e94d72f | 2841 | #endif |
95c96174 | 2842 | unsigned int dropped; |
0a9627f2 | 2843 | struct sk_buff_head input_pkt_queue; |
bea3348e | 2844 | struct napi_struct backlog; |
99bbc707 | 2845 | |
1da177e4 LT |
2846 | }; |
2847 | ||
76cc8b13 | 2848 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
2849 | { |
2850 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
2851 | sd->input_queue_head++; |
2852 | #endif | |
2853 | } | |
2854 | ||
2855 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
2856 | unsigned int *qtail) | |
2857 | { | |
2858 | #ifdef CONFIG_RPS | |
2859 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
2860 | #endif |
2861 | } | |
2862 | ||
0a9627f2 | 2863 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 2864 | |
f629d208 | 2865 | void __netif_schedule(struct Qdisc *q); |
46e5da40 | 2866 | void netif_schedule_queue(struct netdev_queue *txq); |
86d804e1 | 2867 | |
fd2ea0a7 DM |
2868 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2869 | { | |
2870 | unsigned int i; | |
2871 | ||
2872 | for (i = 0; i < dev->num_tx_queues; i++) | |
2873 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
2874 | } | |
2875 | ||
f9a7cbbf | 2876 | static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
d29f749e | 2877 | { |
73466498 | 2878 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2879 | } |
2880 | ||
bea3348e SH |
2881 | /** |
2882 | * netif_start_queue - allow transmit | |
2883 | * @dev: network device | |
2884 | * | |
2885 | * Allow upper layers to call the device hard_start_xmit routine. | |
2886 | */ | |
1da177e4 LT |
2887 | static inline void netif_start_queue(struct net_device *dev) |
2888 | { | |
e8a0464c | 2889 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2890 | } |
2891 | ||
fd2ea0a7 DM |
2892 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2893 | { | |
2894 | unsigned int i; | |
2895 | ||
2896 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2897 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2898 | netif_tx_start_queue(txq); | |
2899 | } | |
2900 | } | |
2901 | ||
46e5da40 | 2902 | void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
79d16385 | 2903 | |
d29f749e DJ |
2904 | /** |
2905 | * netif_wake_queue - restart transmit | |
2906 | * @dev: network device | |
2907 | * | |
2908 | * Allow upper layers to call the device hard_start_xmit routine. | |
2909 | * Used for flow control when transmit resources are available. | |
2910 | */ | |
79d16385 DM |
2911 | static inline void netif_wake_queue(struct net_device *dev) |
2912 | { | |
e8a0464c | 2913 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2914 | } |
2915 | ||
fd2ea0a7 DM |
2916 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2917 | { | |
2918 | unsigned int i; | |
2919 | ||
2920 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2921 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2922 | netif_tx_wake_queue(txq); | |
2923 | } | |
2924 | } | |
2925 | ||
f9a7cbbf | 2926 | static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
d29f749e | 2927 | { |
73466498 | 2928 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2929 | } |
2930 | ||
bea3348e SH |
2931 | /** |
2932 | * netif_stop_queue - stop transmitted packets | |
2933 | * @dev: network device | |
2934 | * | |
2935 | * Stop upper layers calling the device hard_start_xmit routine. | |
2936 | * Used for flow control when transmit resources are unavailable. | |
2937 | */ | |
1da177e4 LT |
2938 | static inline void netif_stop_queue(struct net_device *dev) |
2939 | { | |
e8a0464c | 2940 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2941 | } |
2942 | ||
a2029240 | 2943 | void netif_tx_stop_all_queues(struct net_device *dev); |
fd2ea0a7 | 2944 | |
4d29515f | 2945 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2946 | { |
73466498 | 2947 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2948 | } |
2949 | ||
bea3348e SH |
2950 | /** |
2951 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2952 | * @dev: network device | |
2953 | * | |
2954 | * Test if transmit queue on device is currently unable to send. | |
2955 | */ | |
4d29515f | 2956 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2957 | { |
e8a0464c | 2958 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2959 | } |
2960 | ||
4d29515f | 2961 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2962 | { |
73466498 TH |
2963 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2964 | } | |
2965 | ||
8e2f1a63 DB |
2966 | static inline bool |
2967 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) | |
73466498 TH |
2968 | { |
2969 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2970 | } | |
2971 | ||
8e2f1a63 DB |
2972 | static inline bool |
2973 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) | |
2974 | { | |
2975 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; | |
2976 | } | |
2977 | ||
53511453 ED |
2978 | /** |
2979 | * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write | |
2980 | * @dev_queue: pointer to transmit queue | |
2981 | * | |
2982 | * BQL enabled drivers might use this helper in their ndo_start_xmit(), | |
5e82b4b2 | 2983 | * to give appropriate hint to the CPU. |
53511453 ED |
2984 | */ |
2985 | static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) | |
2986 | { | |
2987 | #ifdef CONFIG_BQL | |
2988 | prefetchw(&dev_queue->dql.num_queued); | |
2989 | #endif | |
2990 | } | |
2991 | ||
2992 | /** | |
2993 | * netdev_txq_bql_complete_prefetchw - prefetch bql data for write | |
2994 | * @dev_queue: pointer to transmit queue | |
2995 | * | |
2996 | * BQL enabled drivers might use this helper in their TX completion path, | |
5e82b4b2 | 2997 | * to give appropriate hint to the CPU. |
53511453 ED |
2998 | */ |
2999 | static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) | |
3000 | { | |
3001 | #ifdef CONFIG_BQL | |
3002 | prefetchw(&dev_queue->dql.limit); | |
3003 | #endif | |
3004 | } | |
3005 | ||
c5d67bd7 TH |
3006 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
3007 | unsigned int bytes) | |
3008 | { | |
114cf580 TH |
3009 | #ifdef CONFIG_BQL |
3010 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
3011 | |
3012 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
3013 | return; | |
3014 | ||
3015 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
3016 | ||
3017 | /* | |
3018 | * The XOFF flag must be set before checking the dql_avail below, | |
3019 | * because in netdev_tx_completed_queue we update the dql_completed | |
3020 | * before checking the XOFF flag. | |
3021 | */ | |
3022 | smp_mb(); | |
3023 | ||
3024 | /* check again in case another CPU has just made room avail */ | |
3025 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
3026 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 3027 | #endif |
c5d67bd7 TH |
3028 | } |
3029 | ||
0042d0c8 FF |
3030 | /** |
3031 | * netdev_sent_queue - report the number of bytes queued to hardware | |
3032 | * @dev: network device | |
3033 | * @bytes: number of bytes queued to the hardware device queue | |
3034 | * | |
3035 | * Report the number of bytes queued for sending/completion to the network | |
3036 | * device hardware queue. @bytes should be a good approximation and should | |
3037 | * exactly match netdev_completed_queue() @bytes | |
3038 | */ | |
c5d67bd7 TH |
3039 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
3040 | { | |
3041 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
3042 | } | |
3043 | ||
3044 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 3045 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 3046 | { |
114cf580 | 3047 | #ifdef CONFIG_BQL |
b37c0fbe AD |
3048 | if (unlikely(!bytes)) |
3049 | return; | |
3050 | ||
3051 | dql_completed(&dev_queue->dql, bytes); | |
3052 | ||
3053 | /* | |
3054 | * Without the memory barrier there is a small possiblity that | |
3055 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
3056 | * be stopped forever | |
3057 | */ | |
3058 | smp_mb(); | |
3059 | ||
3060 | if (dql_avail(&dev_queue->dql) < 0) | |
3061 | return; | |
3062 | ||
3063 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
3064 | netif_schedule_queue(dev_queue); | |
114cf580 | 3065 | #endif |
c5d67bd7 TH |
3066 | } |
3067 | ||
0042d0c8 FF |
3068 | /** |
3069 | * netdev_completed_queue - report bytes and packets completed by device | |
3070 | * @dev: network device | |
3071 | * @pkts: actual number of packets sent over the medium | |
3072 | * @bytes: actual number of bytes sent over the medium | |
3073 | * | |
3074 | * Report the number of bytes and packets transmitted by the network device | |
3075 | * hardware queue over the physical medium, @bytes must exactly match the | |
3076 | * @bytes amount passed to netdev_sent_queue() | |
3077 | */ | |
c5d67bd7 | 3078 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 3079 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
3080 | { |
3081 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
3082 | } | |
3083 | ||
3084 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
3085 | { | |
114cf580 | 3086 | #ifdef CONFIG_BQL |
5c490354 | 3087 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
3088 | dql_reset(&q->dql); |
3089 | #endif | |
c5d67bd7 TH |
3090 | } |
3091 | ||
0042d0c8 FF |
3092 | /** |
3093 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
3094 | * @dev_queue: network device | |
3095 | * | |
3096 | * Reset the bytes and packet count of a network device and clear the | |
3097 | * software flow control OFF bit for this network device | |
3098 | */ | |
c5d67bd7 TH |
3099 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
3100 | { | |
3101 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
3102 | } |
3103 | ||
b9507bda DB |
3104 | /** |
3105 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
3106 | * @dev: network device | |
3107 | * @queue_index: given tx queue index | |
3108 | * | |
3109 | * Returns 0 if given tx queue index >= number of device tx queues, | |
3110 | * otherwise returns the originally passed tx queue index. | |
3111 | */ | |
3112 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
3113 | { | |
3114 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
3115 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
3116 | dev->name, queue_index, | |
3117 | dev->real_num_tx_queues); | |
3118 | return 0; | |
3119 | } | |
3120 | ||
3121 | return queue_index; | |
3122 | } | |
3123 | ||
bea3348e SH |
3124 | /** |
3125 | * netif_running - test if up | |
3126 | * @dev: network device | |
3127 | * | |
3128 | * Test if the device has been brought up. | |
3129 | */ | |
4d29515f | 3130 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
3131 | { |
3132 | return test_bit(__LINK_STATE_START, &dev->state); | |
3133 | } | |
3134 | ||
f25f4e44 | 3135 | /* |
5e82b4b2 | 3136 | * Routines to manage the subqueues on a device. We only need start, |
f25f4e44 PWJ |
3137 | * stop, and a check if it's stopped. All other device management is |
3138 | * done at the overall netdevice level. | |
3139 | * Also test the device if we're multiqueue. | |
3140 | */ | |
bea3348e SH |
3141 | |
3142 | /** | |
3143 | * netif_start_subqueue - allow sending packets on subqueue | |
3144 | * @dev: network device | |
3145 | * @queue_index: sub queue index | |
3146 | * | |
3147 | * Start individual transmit queue of a device with multiple transmit queues. | |
3148 | */ | |
f25f4e44 PWJ |
3149 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
3150 | { | |
fd2ea0a7 | 3151 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3152 | |
3153 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
3154 | } |
3155 | ||
bea3348e SH |
3156 | /** |
3157 | * netif_stop_subqueue - stop sending packets on subqueue | |
3158 | * @dev: network device | |
3159 | * @queue_index: sub queue index | |
3160 | * | |
3161 | * Stop individual transmit queue of a device with multiple transmit queues. | |
3162 | */ | |
f25f4e44 PWJ |
3163 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
3164 | { | |
fd2ea0a7 | 3165 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 3166 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
3167 | } |
3168 | ||
bea3348e SH |
3169 | /** |
3170 | * netif_subqueue_stopped - test status of subqueue | |
3171 | * @dev: network device | |
3172 | * @queue_index: sub queue index | |
3173 | * | |
3174 | * Check individual transmit queue of a device with multiple transmit queues. | |
3175 | */ | |
4d29515f DM |
3176 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
3177 | u16 queue_index) | |
f25f4e44 | 3178 | { |
fd2ea0a7 | 3179 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3180 | |
3181 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
3182 | } |
3183 | ||
4d29515f DM |
3184 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
3185 | struct sk_buff *skb) | |
668f895a PE |
3186 | { |
3187 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
3188 | } | |
bea3348e | 3189 | |
738b35cc FF |
3190 | /** |
3191 | * netif_wake_subqueue - allow sending packets on subqueue | |
3192 | * @dev: network device | |
3193 | * @queue_index: sub queue index | |
3194 | * | |
3195 | * Resume individual transmit queue of a device with multiple transmit queues. | |
3196 | */ | |
3197 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
3198 | { | |
3199 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
3200 | ||
3201 | netif_tx_wake_queue(txq); | |
3202 | } | |
f25f4e44 | 3203 | |
537c00de | 3204 | #ifdef CONFIG_XPS |
53af53ae | 3205 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 3206 | u16 index); |
537c00de AD |
3207 | #else |
3208 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 3209 | const struct cpumask *mask, |
537c00de AD |
3210 | u16 index) |
3211 | { | |
3212 | return 0; | |
3213 | } | |
3214 | #endif | |
3215 | ||
5605c762 JP |
3216 | u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb, |
3217 | unsigned int num_tx_queues); | |
3218 | ||
a3d22a68 VZ |
3219 | /* |
3220 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
3221 | * as a distribution range limit for the returned value. | |
3222 | */ | |
3223 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
0e001614 | 3224 | struct sk_buff *skb) |
a3d22a68 VZ |
3225 | { |
3226 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
3227 | } | |
3228 | ||
bea3348e SH |
3229 | /** |
3230 | * netif_is_multiqueue - test if device has multiple transmit queues | |
3231 | * @dev: network device | |
3232 | * | |
3233 | * Check if device has multiple transmit queues | |
bea3348e | 3234 | */ |
4d29515f | 3235 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 3236 | { |
a02cec21 | 3237 | return dev->num_tx_queues > 1; |
f25f4e44 | 3238 | } |
1da177e4 | 3239 | |
f629d208 | 3240 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 3241 | |
a953be53 | 3242 | #ifdef CONFIG_SYSFS |
f629d208 | 3243 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
3244 | #else |
3245 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
3246 | unsigned int rxq) | |
3247 | { | |
3248 | return 0; | |
3249 | } | |
3250 | #endif | |
3251 | ||
65073a67 DB |
3252 | static inline struct netdev_rx_queue * |
3253 | __netif_get_rx_queue(struct net_device *dev, unsigned int rxq) | |
3254 | { | |
3255 | return dev->_rx + rxq; | |
3256 | } | |
3257 | ||
a953be53 MD |
3258 | #ifdef CONFIG_SYSFS |
3259 | static inline unsigned int get_netdev_rx_queue_index( | |
3260 | struct netdev_rx_queue *queue) | |
3261 | { | |
3262 | struct net_device *dev = queue->dev; | |
3263 | int index = queue - dev->_rx; | |
3264 | ||
3265 | BUG_ON(index >= dev->num_rx_queues); | |
3266 | return index; | |
3267 | } | |
3268 | #endif | |
3269 | ||
16917b87 | 3270 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 3271 | int netif_get_num_default_rss_queues(void); |
16917b87 | 3272 | |
e6247027 ED |
3273 | enum skb_free_reason { |
3274 | SKB_REASON_CONSUMED, | |
3275 | SKB_REASON_DROPPED, | |
3276 | }; | |
3277 | ||
3278 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
3279 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 3280 | |
e6247027 ED |
3281 | /* |
3282 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
3283 | * interrupt context or with hardware interrupts being disabled. | |
3284 | * (in_irq() || irqs_disabled()) | |
3285 | * | |
3286 | * We provide four helpers that can be used in following contexts : | |
3287 | * | |
3288 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
3289 | * replacing kfree_skb(skb) | |
3290 | * | |
3291 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
3292 | * Typically used in place of consume_skb(skb) in TX completion path | |
3293 | * | |
3294 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
3295 | * replacing kfree_skb(skb) | |
3296 | * | |
3297 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
3298 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 3299 | */ |
e6247027 ED |
3300 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
3301 | { | |
3302 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
3303 | } | |
3304 | ||
3305 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
3306 | { | |
3307 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
3308 | } | |
3309 | ||
3310 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
3311 | { | |
3312 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
3313 | } | |
3314 | ||
3315 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
3316 | { | |
3317 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
3318 | } | |
1da177e4 | 3319 | |
7c497478 JW |
3320 | void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog); |
3321 | int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb); | |
f629d208 JP |
3322 | int netif_rx(struct sk_buff *skb); |
3323 | int netif_rx_ni(struct sk_buff *skb); | |
04eb4489 | 3324 | int netif_receive_skb(struct sk_buff *skb); |
1c601d82 | 3325 | int netif_receive_skb_core(struct sk_buff *skb); |
f629d208 JP |
3326 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); |
3327 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
3328 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
3329 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
3330 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
3331 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
3332 | |
3333 | static inline void napi_free_frags(struct napi_struct *napi) | |
3334 | { | |
3335 | kfree_skb(napi->skb); | |
3336 | napi->skb = NULL; | |
3337 | } | |
3338 | ||
24b27fc4 | 3339 | bool netdev_is_rx_handler_busy(struct net_device *dev); |
f629d208 JP |
3340 | int netdev_rx_handler_register(struct net_device *dev, |
3341 | rx_handler_func_t *rx_handler, | |
3342 | void *rx_handler_data); | |
3343 | void netdev_rx_handler_unregister(struct net_device *dev); | |
3344 | ||
3345 | bool dev_valid_name(const char *name); | |
44c02a2c AV |
3346 | int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, |
3347 | bool *need_copyout); | |
36fd633e | 3348 | int dev_ifconf(struct net *net, struct ifconf *, int); |
f629d208 JP |
3349 | int dev_ethtool(struct net *net, struct ifreq *); |
3350 | unsigned int dev_get_flags(const struct net_device *); | |
3351 | int __dev_change_flags(struct net_device *, unsigned int flags); | |
3352 | int dev_change_flags(struct net_device *, unsigned int); | |
cb178190 DM |
3353 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
3354 | unsigned int gchanges); | |
f629d208 JP |
3355 | int dev_change_name(struct net_device *, const char *); |
3356 | int dev_set_alias(struct net_device *, const char *, size_t); | |
6c557001 | 3357 | int dev_get_alias(const struct net_device *, char *, size_t); |
f629d208 | 3358 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); |
f51048c3 | 3359 | int __dev_set_mtu(struct net_device *, int); |
f629d208 | 3360 | int dev_set_mtu(struct net_device *, int); |
6a643ddb | 3361 | int dev_change_tx_queue_len(struct net_device *, unsigned long); |
f629d208 JP |
3362 | void dev_set_group(struct net_device *, int); |
3363 | int dev_set_mac_address(struct net_device *, struct sockaddr *); | |
3364 | int dev_change_carrier(struct net_device *, bool new_carrier); | |
3365 | int dev_get_phys_port_id(struct net_device *dev, | |
02637fce | 3366 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
3367 | int dev_get_phys_port_name(struct net_device *dev, |
3368 | char *name, size_t len); | |
d746d707 | 3369 | int dev_change_proto_down(struct net_device *dev, bool proto_down); |
f53c7239 | 3370 | struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again); |
ce93718f DM |
3371 | struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
3372 | struct netdev_queue *txq, int *ret); | |
d67b9cd2 | 3373 | |
f4e63525 | 3374 | typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf); |
d67b9cd2 DB |
3375 | int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack, |
3376 | int fd, u32 flags); | |
118b4aa2 JK |
3377 | void __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op, |
3378 | struct netdev_bpf *xdp); | |
d67b9cd2 | 3379 | |
a0265d28 | 3380 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f629d208 | 3381 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f4b05d27 NA |
3382 | bool is_skb_forwardable(const struct net_device *dev, |
3383 | const struct sk_buff *skb); | |
1da177e4 | 3384 | |
4e3264d2 MKL |
3385 | static __always_inline int ____dev_forward_skb(struct net_device *dev, |
3386 | struct sk_buff *skb) | |
3387 | { | |
3388 | if (skb_orphan_frags(skb, GFP_ATOMIC) || | |
3389 | unlikely(!is_skb_forwardable(dev, skb))) { | |
3390 | atomic_long_inc(&dev->rx_dropped); | |
3391 | kfree_skb(skb); | |
3392 | return NET_RX_DROP; | |
3393 | } | |
3394 | ||
3395 | skb_scrub_packet(skb, true); | |
3396 | skb->priority = 0; | |
3397 | return 0; | |
3398 | } | |
3399 | ||
74b20582 DA |
3400 | void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
3401 | ||
20380731 | 3402 | extern int netdev_budget; |
7acf8a1e | 3403 | extern unsigned int netdev_budget_usecs; |
1da177e4 LT |
3404 | |
3405 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 3406 | void netdev_run_todo(void); |
1da177e4 | 3407 | |
bea3348e SH |
3408 | /** |
3409 | * dev_put - release reference to device | |
3410 | * @dev: network device | |
3411 | * | |
9ef4429b | 3412 | * Release reference to device to allow it to be freed. |
bea3348e | 3413 | */ |
1da177e4 LT |
3414 | static inline void dev_put(struct net_device *dev) |
3415 | { | |
933393f5 | 3416 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
3417 | } |
3418 | ||
bea3348e SH |
3419 | /** |
3420 | * dev_hold - get reference to device | |
3421 | * @dev: network device | |
3422 | * | |
9ef4429b | 3423 | * Hold reference to device to keep it from being freed. |
bea3348e | 3424 | */ |
15333061 SH |
3425 | static inline void dev_hold(struct net_device *dev) |
3426 | { | |
933393f5 | 3427 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 3428 | } |
1da177e4 LT |
3429 | |
3430 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
3431 | * and _off may be called from IRQ context, but it is caller | |
3432 | * who is responsible for serialization of these calls. | |
b00055aa SR |
3433 | * |
3434 | * The name carrier is inappropriate, these functions should really be | |
3435 | * called netif_lowerlayer_*() because they represent the state of any | |
3436 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
3437 | */ |
3438 | ||
f629d208 JP |
3439 | void linkwatch_init_dev(struct net_device *dev); |
3440 | void linkwatch_fire_event(struct net_device *dev); | |
3441 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 3442 | |
bea3348e SH |
3443 | /** |
3444 | * netif_carrier_ok - test if carrier present | |
3445 | * @dev: network device | |
3446 | * | |
3447 | * Check if carrier is present on device | |
3448 | */ | |
4d29515f | 3449 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
3450 | { |
3451 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
3452 | } | |
3453 | ||
f629d208 | 3454 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 3455 | |
f629d208 | 3456 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 3457 | |
f629d208 | 3458 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 3459 | |
f629d208 | 3460 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 3461 | |
bea3348e SH |
3462 | /** |
3463 | * netif_dormant_on - mark device as dormant. | |
3464 | * @dev: network device | |
3465 | * | |
3466 | * Mark device as dormant (as per RFC2863). | |
3467 | * | |
3468 | * The dormant state indicates that the relevant interface is not | |
3469 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
3470 | * in a "pending" state, waiting for some external event. For "on- | |
3471 | * demand" interfaces, this new state identifies the situation where the | |
3472 | * interface is waiting for events to place it in the up state. | |
bea3348e | 3473 | */ |
b00055aa SR |
3474 | static inline void netif_dormant_on(struct net_device *dev) |
3475 | { | |
3476 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3477 | linkwatch_fire_event(dev); | |
3478 | } | |
3479 | ||
bea3348e SH |
3480 | /** |
3481 | * netif_dormant_off - set device as not dormant. | |
3482 | * @dev: network device | |
3483 | * | |
3484 | * Device is not in dormant state. | |
3485 | */ | |
b00055aa SR |
3486 | static inline void netif_dormant_off(struct net_device *dev) |
3487 | { | |
3488 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3489 | linkwatch_fire_event(dev); | |
3490 | } | |
3491 | ||
bea3348e | 3492 | /** |
8ecbc40a | 3493 | * netif_dormant - test if device is dormant |
bea3348e SH |
3494 | * @dev: network device |
3495 | * | |
8ecbc40a | 3496 | * Check if device is dormant. |
bea3348e | 3497 | */ |
4d29515f | 3498 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
3499 | { |
3500 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
3501 | } | |
3502 | ||
3503 | ||
bea3348e SH |
3504 | /** |
3505 | * netif_oper_up - test if device is operational | |
3506 | * @dev: network device | |
3507 | * | |
3508 | * Check if carrier is operational | |
3509 | */ | |
4d29515f | 3510 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 3511 | { |
b00055aa SR |
3512 | return (dev->operstate == IF_OPER_UP || |
3513 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
3514 | } | |
3515 | ||
bea3348e SH |
3516 | /** |
3517 | * netif_device_present - is device available or removed | |
3518 | * @dev: network device | |
3519 | * | |
3520 | * Check if device has not been removed from system. | |
3521 | */ | |
4d29515f | 3522 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
3523 | { |
3524 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
3525 | } | |
3526 | ||
f629d208 | 3527 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 3528 | |
f629d208 | 3529 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
3530 | |
3531 | /* | |
3532 | * Network interface message level settings | |
3533 | */ | |
1da177e4 LT |
3534 | |
3535 | enum { | |
3536 | NETIF_MSG_DRV = 0x0001, | |
3537 | NETIF_MSG_PROBE = 0x0002, | |
3538 | NETIF_MSG_LINK = 0x0004, | |
3539 | NETIF_MSG_TIMER = 0x0008, | |
3540 | NETIF_MSG_IFDOWN = 0x0010, | |
3541 | NETIF_MSG_IFUP = 0x0020, | |
3542 | NETIF_MSG_RX_ERR = 0x0040, | |
3543 | NETIF_MSG_TX_ERR = 0x0080, | |
3544 | NETIF_MSG_TX_QUEUED = 0x0100, | |
3545 | NETIF_MSG_INTR = 0x0200, | |
3546 | NETIF_MSG_TX_DONE = 0x0400, | |
3547 | NETIF_MSG_RX_STATUS = 0x0800, | |
3548 | NETIF_MSG_PKTDATA = 0x1000, | |
3549 | NETIF_MSG_HW = 0x2000, | |
3550 | NETIF_MSG_WOL = 0x4000, | |
3551 | }; | |
3552 | ||
3553 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
3554 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
3555 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
3556 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
3557 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
3558 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
3559 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
3560 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
3561 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
3562 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
3563 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
3564 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
3565 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
3566 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
3567 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
3568 | ||
3569 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
3570 | { | |
3571 | /* use default */ | |
3572 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
3573 | return default_msg_enable_bits; | |
3574 | if (debug_value == 0) /* no output */ | |
3575 | return 0; | |
3576 | /* set low N bits */ | |
3577 | return (1 << debug_value) - 1; | |
3578 | } | |
3579 | ||
c773e847 | 3580 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 3581 | { |
c773e847 DM |
3582 | spin_lock(&txq->_xmit_lock); |
3583 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
3584 | } |
3585 | ||
5a717f4f MT |
3586 | static inline bool __netif_tx_acquire(struct netdev_queue *txq) |
3587 | { | |
3588 | __acquire(&txq->_xmit_lock); | |
3589 | return true; | |
3590 | } | |
3591 | ||
3592 | static inline void __netif_tx_release(struct netdev_queue *txq) | |
3593 | { | |
3594 | __release(&txq->_xmit_lock); | |
3595 | } | |
3596 | ||
fd2ea0a7 DM |
3597 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
3598 | { | |
3599 | spin_lock_bh(&txq->_xmit_lock); | |
3600 | txq->xmit_lock_owner = smp_processor_id(); | |
3601 | } | |
3602 | ||
4d29515f | 3603 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 3604 | { |
4d29515f | 3605 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
3606 | if (likely(ok)) |
3607 | txq->xmit_lock_owner = smp_processor_id(); | |
3608 | return ok; | |
3609 | } | |
3610 | ||
3611 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
3612 | { | |
3613 | txq->xmit_lock_owner = -1; | |
3614 | spin_unlock(&txq->_xmit_lock); | |
3615 | } | |
3616 | ||
3617 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
3618 | { | |
3619 | txq->xmit_lock_owner = -1; | |
3620 | spin_unlock_bh(&txq->_xmit_lock); | |
3621 | } | |
3622 | ||
08baf561 ED |
3623 | static inline void txq_trans_update(struct netdev_queue *txq) |
3624 | { | |
3625 | if (txq->xmit_lock_owner != -1) | |
3626 | txq->trans_start = jiffies; | |
3627 | } | |
3628 | ||
ba162f8e FW |
3629 | /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */ |
3630 | static inline void netif_trans_update(struct net_device *dev) | |
3631 | { | |
9b36627a FW |
3632 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
3633 | ||
3634 | if (txq->trans_start != jiffies) | |
3635 | txq->trans_start = jiffies; | |
ba162f8e FW |
3636 | } |
3637 | ||
d29f749e DJ |
3638 | /** |
3639 | * netif_tx_lock - grab network device transmit lock | |
3640 | * @dev: network device | |
d29f749e DJ |
3641 | * |
3642 | * Get network device transmit lock | |
3643 | */ | |
22dd7495 JHS |
3644 | static inline void netif_tx_lock(struct net_device *dev) |
3645 | { | |
e8a0464c | 3646 | unsigned int i; |
c3f26a26 | 3647 | int cpu; |
c773e847 | 3648 | |
c3f26a26 DM |
3649 | spin_lock(&dev->tx_global_lock); |
3650 | cpu = smp_processor_id(); | |
e8a0464c DM |
3651 | for (i = 0; i < dev->num_tx_queues; i++) { |
3652 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3653 | |
3654 | /* We are the only thread of execution doing a | |
3655 | * freeze, but we have to grab the _xmit_lock in | |
3656 | * order to synchronize with threads which are in | |
3657 | * the ->hard_start_xmit() handler and already | |
3658 | * checked the frozen bit. | |
3659 | */ | |
e8a0464c | 3660 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
3661 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
3662 | __netif_tx_unlock(txq); | |
e8a0464c | 3663 | } |
932ff279 HX |
3664 | } |
3665 | ||
3666 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
3667 | { | |
e8a0464c DM |
3668 | local_bh_disable(); |
3669 | netif_tx_lock(dev); | |
932ff279 HX |
3670 | } |
3671 | ||
932ff279 HX |
3672 | static inline void netif_tx_unlock(struct net_device *dev) |
3673 | { | |
e8a0464c DM |
3674 | unsigned int i; |
3675 | ||
3676 | for (i = 0; i < dev->num_tx_queues; i++) { | |
3677 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 3678 | |
c3f26a26 DM |
3679 | /* No need to grab the _xmit_lock here. If the |
3680 | * queue is not stopped for another reason, we | |
3681 | * force a schedule. | |
3682 | */ | |
3683 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 3684 | netif_schedule_queue(txq); |
c3f26a26 DM |
3685 | } |
3686 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
3687 | } |
3688 | ||
3689 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
3690 | { | |
e8a0464c DM |
3691 | netif_tx_unlock(dev); |
3692 | local_bh_enable(); | |
932ff279 HX |
3693 | } |
3694 | ||
c773e847 | 3695 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 3696 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3697 | __netif_tx_lock(txq, cpu); \ |
5a717f4f MT |
3698 | } else { \ |
3699 | __netif_tx_acquire(txq); \ | |
22dd7495 JHS |
3700 | } \ |
3701 | } | |
3702 | ||
5efeac44 EB |
3703 | #define HARD_TX_TRYLOCK(dev, txq) \ |
3704 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
3705 | __netif_tx_trylock(txq) : \ | |
5a717f4f | 3706 | __netif_tx_acquire(txq)) |
5efeac44 | 3707 | |
c773e847 | 3708 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 3709 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3710 | __netif_tx_unlock(txq); \ |
5a717f4f MT |
3711 | } else { \ |
3712 | __netif_tx_release(txq); \ | |
22dd7495 JHS |
3713 | } \ |
3714 | } | |
3715 | ||
1da177e4 LT |
3716 | static inline void netif_tx_disable(struct net_device *dev) |
3717 | { | |
fd2ea0a7 | 3718 | unsigned int i; |
c3f26a26 | 3719 | int cpu; |
fd2ea0a7 | 3720 | |
c3f26a26 DM |
3721 | local_bh_disable(); |
3722 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
3723 | for (i = 0; i < dev->num_tx_queues; i++) { |
3724 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3725 | |
3726 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 3727 | netif_tx_stop_queue(txq); |
c3f26a26 | 3728 | __netif_tx_unlock(txq); |
fd2ea0a7 | 3729 | } |
c3f26a26 | 3730 | local_bh_enable(); |
1da177e4 LT |
3731 | } |
3732 | ||
e308a5d8 DM |
3733 | static inline void netif_addr_lock(struct net_device *dev) |
3734 | { | |
3735 | spin_lock(&dev->addr_list_lock); | |
3736 | } | |
3737 | ||
2429f7ac JP |
3738 | static inline void netif_addr_lock_nested(struct net_device *dev) |
3739 | { | |
25175ba5 VY |
3740 | int subclass = SINGLE_DEPTH_NESTING; |
3741 | ||
3742 | if (dev->netdev_ops->ndo_get_lock_subclass) | |
3743 | subclass = dev->netdev_ops->ndo_get_lock_subclass(dev); | |
3744 | ||
3745 | spin_lock_nested(&dev->addr_list_lock, subclass); | |
2429f7ac JP |
3746 | } |
3747 | ||
e308a5d8 DM |
3748 | static inline void netif_addr_lock_bh(struct net_device *dev) |
3749 | { | |
3750 | spin_lock_bh(&dev->addr_list_lock); | |
3751 | } | |
3752 | ||
3753 | static inline void netif_addr_unlock(struct net_device *dev) | |
3754 | { | |
3755 | spin_unlock(&dev->addr_list_lock); | |
3756 | } | |
3757 | ||
3758 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
3759 | { | |
3760 | spin_unlock_bh(&dev->addr_list_lock); | |
3761 | } | |
3762 | ||
f001fde5 | 3763 | /* |
31278e71 | 3764 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
3765 | * rcu_read_lock held. |
3766 | */ | |
3767 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 3768 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 3769 | |
1da177e4 LT |
3770 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
3771 | ||
f629d208 | 3772 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
3773 | |
3774 | /* Support for loadable net-drivers */ | |
f629d208 | 3775 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
c835a677 | 3776 | unsigned char name_assign_type, |
f629d208 JP |
3777 | void (*setup)(struct net_device *), |
3778 | unsigned int txqs, unsigned int rxqs); | |
0ad646c8 CW |
3779 | int dev_get_valid_name(struct net *net, struct net_device *dev, |
3780 | const char *name); | |
3781 | ||
c835a677 TG |
3782 | #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ |
3783 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) | |
36909ea4 | 3784 | |
c835a677 TG |
3785 | #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ |
3786 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ | |
3787 | count) | |
36909ea4 | 3788 | |
f629d208 JP |
3789 | int register_netdev(struct net_device *dev); |
3790 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 3791 | |
22bedad3 | 3792 | /* General hardware address lists handling functions */ |
f629d208 JP |
3793 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
3794 | struct netdev_hw_addr_list *from_list, int addr_len); | |
3795 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
3796 | struct netdev_hw_addr_list *from_list, int addr_len); | |
670e5b8e AD |
3797 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
3798 | struct net_device *dev, | |
3799 | int (*sync)(struct net_device *, const unsigned char *), | |
3800 | int (*unsync)(struct net_device *, | |
3801 | const unsigned char *)); | |
3802 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, | |
3803 | struct net_device *dev, | |
3804 | int (*unsync)(struct net_device *, | |
3805 | const unsigned char *)); | |
f629d208 | 3806 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 3807 | |
f001fde5 | 3808 | /* Functions used for device addresses handling */ |
f629d208 JP |
3809 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
3810 | unsigned char addr_type); | |
3811 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
3812 | unsigned char addr_type); | |
f629d208 JP |
3813 | void dev_addr_flush(struct net_device *dev); |
3814 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
3815 | |
3816 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
3817 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
3818 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3819 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
3820 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
3821 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
3822 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
3823 | void dev_uc_flush(struct net_device *dev); | |
3824 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 3825 | |
670e5b8e AD |
3826 | /** |
3827 | * __dev_uc_sync - Synchonize device's unicast list | |
3828 | * @dev: device to sync | |
3829 | * @sync: function to call if address should be added | |
3830 | * @unsync: function to call if address should be removed | |
3831 | * | |
3832 | * Add newly added addresses to the interface, and release | |
3833 | * addresses that have been deleted. | |
5e82b4b2 | 3834 | */ |
670e5b8e AD |
3835 | static inline int __dev_uc_sync(struct net_device *dev, |
3836 | int (*sync)(struct net_device *, | |
3837 | const unsigned char *), | |
3838 | int (*unsync)(struct net_device *, | |
3839 | const unsigned char *)) | |
3840 | { | |
3841 | return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); | |
3842 | } | |
3843 | ||
3844 | /** | |
e793c0f7 | 3845 | * __dev_uc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3846 | * @dev: device to sync |
3847 | * @unsync: function to call if address should be removed | |
3848 | * | |
3849 | * Remove all addresses that were added to the device by dev_uc_sync(). | |
5e82b4b2 | 3850 | */ |
670e5b8e AD |
3851 | static inline void __dev_uc_unsync(struct net_device *dev, |
3852 | int (*unsync)(struct net_device *, | |
3853 | const unsigned char *)) | |
3854 | { | |
3855 | __hw_addr_unsync_dev(&dev->uc, dev, unsync); | |
3856 | } | |
3857 | ||
22bedad3 | 3858 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
3859 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
3860 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
3861 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3862 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
3863 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
3864 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
3865 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
3866 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
3867 | void dev_mc_flush(struct net_device *dev); | |
3868 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 3869 | |
670e5b8e AD |
3870 | /** |
3871 | * __dev_mc_sync - Synchonize device's multicast list | |
3872 | * @dev: device to sync | |
3873 | * @sync: function to call if address should be added | |
3874 | * @unsync: function to call if address should be removed | |
3875 | * | |
3876 | * Add newly added addresses to the interface, and release | |
3877 | * addresses that have been deleted. | |
5e82b4b2 | 3878 | */ |
670e5b8e AD |
3879 | static inline int __dev_mc_sync(struct net_device *dev, |
3880 | int (*sync)(struct net_device *, | |
3881 | const unsigned char *), | |
3882 | int (*unsync)(struct net_device *, | |
3883 | const unsigned char *)) | |
3884 | { | |
3885 | return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); | |
3886 | } | |
3887 | ||
3888 | /** | |
e793c0f7 | 3889 | * __dev_mc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3890 | * @dev: device to sync |
3891 | * @unsync: function to call if address should be removed | |
3892 | * | |
3893 | * Remove all addresses that were added to the device by dev_mc_sync(). | |
5e82b4b2 | 3894 | */ |
670e5b8e AD |
3895 | static inline void __dev_mc_unsync(struct net_device *dev, |
3896 | int (*unsync)(struct net_device *, | |
3897 | const unsigned char *)) | |
3898 | { | |
3899 | __hw_addr_unsync_dev(&dev->mc, dev, unsync); | |
3900 | } | |
3901 | ||
4417da66 | 3902 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
3903 | void dev_set_rx_mode(struct net_device *dev); |
3904 | void __dev_set_rx_mode(struct net_device *dev); | |
3905 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
3906 | int dev_set_allmulti(struct net_device *dev, int inc); | |
3907 | void netdev_state_change(struct net_device *dev); | |
3908 | void netdev_notify_peers(struct net_device *dev); | |
3909 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 3910 | /* Load a device via the kmod */ |
f629d208 JP |
3911 | void dev_load(struct net *net, const char *name); |
3912 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
3913 | struct rtnl_link_stats64 *storage); | |
3914 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
3915 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 3916 | |
1da177e4 | 3917 | extern int netdev_max_backlog; |
3b098e2d | 3918 | extern int netdev_tstamp_prequeue; |
1da177e4 | 3919 | extern int weight_p; |
3d48b53f MT |
3920 | extern int dev_weight_rx_bias; |
3921 | extern int dev_weight_tx_bias; | |
3922 | extern int dev_rx_weight; | |
3923 | extern int dev_tx_weight; | |
9ff162a8 | 3924 | |
f629d208 | 3925 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
44a40855 VY |
3926 | struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, |
3927 | struct list_head **iter); | |
f629d208 JP |
3928 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
3929 | struct list_head **iter); | |
8b5be856 | 3930 | |
44a40855 VY |
3931 | /* iterate through upper list, must be called under RCU read lock */ |
3932 | #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ | |
3933 | for (iter = &(dev)->adj_list.upper, \ | |
3934 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3935 | updev; \ | |
3936 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) | |
3937 | ||
1a3f060c DA |
3938 | int netdev_walk_all_upper_dev_rcu(struct net_device *dev, |
3939 | int (*fn)(struct net_device *upper_dev, | |
3940 | void *data), | |
3941 | void *data); | |
3942 | ||
3943 | bool netdev_has_upper_dev_all_rcu(struct net_device *dev, | |
3944 | struct net_device *upper_dev); | |
3945 | ||
25cc72a3 IS |
3946 | bool netdev_has_any_upper_dev(struct net_device *dev); |
3947 | ||
f629d208 JP |
3948 | void *netdev_lower_get_next_private(struct net_device *dev, |
3949 | struct list_head **iter); | |
3950 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
3951 | struct list_head **iter); | |
31088a11 VF |
3952 | |
3953 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
3954 | for (iter = (dev)->adj_list.lower.next, \ | |
3955 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
3956 | priv; \ | |
3957 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
3958 | ||
3959 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
3960 | for (iter = &(dev)->adj_list.lower, \ | |
3961 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
3962 | priv; \ | |
3963 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
3964 | ||
4085ebe8 VY |
3965 | void *netdev_lower_get_next(struct net_device *dev, |
3966 | struct list_head **iter); | |
7ce856aa | 3967 | |
4085ebe8 | 3968 | #define netdev_for_each_lower_dev(dev, ldev, iter) \ |
cfdd28be | 3969 | for (iter = (dev)->adj_list.lower.next, \ |
4085ebe8 VY |
3970 | ldev = netdev_lower_get_next(dev, &(iter)); \ |
3971 | ldev; \ | |
3972 | ldev = netdev_lower_get_next(dev, &(iter))) | |
3973 | ||
7ce856aa JP |
3974 | struct net_device *netdev_all_lower_get_next(struct net_device *dev, |
3975 | struct list_head **iter); | |
3976 | struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev, | |
3977 | struct list_head **iter); | |
3978 | ||
1a3f060c DA |
3979 | int netdev_walk_all_lower_dev(struct net_device *dev, |
3980 | int (*fn)(struct net_device *lower_dev, | |
3981 | void *data), | |
3982 | void *data); | |
3983 | int netdev_walk_all_lower_dev_rcu(struct net_device *dev, | |
3984 | int (*fn)(struct net_device *lower_dev, | |
3985 | void *data), | |
3986 | void *data); | |
3987 | ||
f629d208 | 3988 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 3989 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
3990 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
3991 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
42ab19ee DA |
3992 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev, |
3993 | struct netlink_ext_ack *extack); | |
f629d208 | 3994 | int netdev_master_upper_dev_link(struct net_device *dev, |
6dffb044 | 3995 | struct net_device *upper_dev, |
42ab19ee DA |
3996 | void *upper_priv, void *upper_info, |
3997 | struct netlink_ext_ack *extack); | |
f629d208 JP |
3998 | void netdev_upper_dev_unlink(struct net_device *dev, |
3999 | struct net_device *upper_dev); | |
5bb025fa | 4000 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
4001 | void *netdev_lower_dev_get_private(struct net_device *dev, |
4002 | struct net_device *lower_dev); | |
04d48266 JP |
4003 | void netdev_lower_state_changed(struct net_device *lower_dev, |
4004 | void *lower_state_info); | |
960fb622 ED |
4005 | |
4006 | /* RSS keys are 40 or 52 bytes long */ | |
4007 | #define NETDEV_RSS_KEY_LEN 52 | |
ba905f5e | 4008 | extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; |
960fb622 ED |
4009 | void netdev_rss_key_fill(void *buffer, size_t len); |
4010 | ||
952fcfd0 | 4011 | int dev_get_nest_level(struct net_device *dev); |
f629d208 | 4012 | int skb_checksum_help(struct sk_buff *skb); |
b72b5bf6 | 4013 | int skb_crc32c_csum_help(struct sk_buff *skb); |
43c26a1a DC |
4014 | int skb_csum_hwoffload_help(struct sk_buff *skb, |
4015 | const netdev_features_t features); | |
4016 | ||
f629d208 JP |
4017 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, |
4018 | netdev_features_t features, bool tx_path); | |
4019 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
4020 | netdev_features_t features); | |
12b0004d | 4021 | |
61bd3857 MS |
4022 | struct netdev_bonding_info { |
4023 | ifslave slave; | |
4024 | ifbond master; | |
4025 | }; | |
4026 | ||
4027 | struct netdev_notifier_bonding_info { | |
4028 | struct netdev_notifier_info info; /* must be first */ | |
4029 | struct netdev_bonding_info bonding_info; | |
4030 | }; | |
4031 | ||
4032 | void netdev_bonding_info_change(struct net_device *dev, | |
4033 | struct netdev_bonding_info *bonding_info); | |
4034 | ||
12b0004d CW |
4035 | static inline |
4036 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
4037 | { | |
4038 | return __skb_gso_segment(skb, features, true); | |
4039 | } | |
53d6471c | 4040 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
4041 | |
4042 | static inline bool can_checksum_protocol(netdev_features_t features, | |
4043 | __be16 protocol) | |
4044 | { | |
c8cd0989 TH |
4045 | if (protocol == htons(ETH_P_FCOE)) |
4046 | return !!(features & NETIF_F_FCOE_CRC); | |
4047 | ||
4048 | /* Assume this is an IP checksum (not SCTP CRC) */ | |
4049 | ||
4050 | if (features & NETIF_F_HW_CSUM) { | |
4051 | /* Can checksum everything */ | |
4052 | return true; | |
4053 | } | |
4054 | ||
4055 | switch (protocol) { | |
4056 | case htons(ETH_P_IP): | |
4057 | return !!(features & NETIF_F_IP_CSUM); | |
4058 | case htons(ETH_P_IPV6): | |
4059 | return !!(features & NETIF_F_IPV6_CSUM); | |
4060 | default: | |
4061 | return false; | |
4062 | } | |
ec5f0615 | 4063 | } |
12b0004d | 4064 | |
fb286bb2 | 4065 | #ifdef CONFIG_BUG |
f629d208 | 4066 | void netdev_rx_csum_fault(struct net_device *dev); |
fb286bb2 HX |
4067 | #else |
4068 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
4069 | { | |
4070 | } | |
4071 | #endif | |
1da177e4 | 4072 | /* rx skb timestamps */ |
f629d208 JP |
4073 | void net_enable_timestamp(void); |
4074 | void net_disable_timestamp(void); | |
1da177e4 | 4075 | |
20380731 | 4076 | #ifdef CONFIG_PROC_FS |
f629d208 | 4077 | int __init dev_proc_init(void); |
900ff8c6 CW |
4078 | #else |
4079 | #define dev_proc_init() 0 | |
20380731 ACM |
4080 | #endif |
4081 | ||
4798248e | 4082 | static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, |
fa2dbdc2 DM |
4083 | struct sk_buff *skb, struct net_device *dev, |
4084 | bool more) | |
4798248e | 4085 | { |
fa2dbdc2 | 4086 | skb->xmit_more = more ? 1 : 0; |
0b725a2c | 4087 | return ops->ndo_start_xmit(skb, dev); |
4798248e DM |
4088 | } |
4089 | ||
10b3ad8c | 4090 | static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, |
fa2dbdc2 | 4091 | struct netdev_queue *txq, bool more) |
4798248e DM |
4092 | { |
4093 | const struct net_device_ops *ops = dev->netdev_ops; | |
10b3ad8c | 4094 | int rc; |
4798248e | 4095 | |
fa2dbdc2 | 4096 | rc = __netdev_start_xmit(ops, skb, dev, more); |
10b3ad8c DM |
4097 | if (rc == NETDEV_TX_OK) |
4098 | txq_trans_update(txq); | |
4099 | ||
4100 | return rc; | |
4798248e DM |
4101 | } |
4102 | ||
b793dc5c | 4103 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
42a2d923 | 4104 | const void *ns); |
b793dc5c | 4105 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
42a2d923 | 4106 | const void *ns); |
58292cbe | 4107 | |
b793dc5c | 4108 | static inline int netdev_class_create_file(const struct class_attribute *class_attr) |
58292cbe TH |
4109 | { |
4110 | return netdev_class_create_file_ns(class_attr, NULL); | |
4111 | } | |
4112 | ||
b793dc5c | 4113 | static inline void netdev_class_remove_file(const struct class_attribute *class_attr) |
58292cbe TH |
4114 | { |
4115 | netdev_class_remove_file_ns(class_attr, NULL); | |
4116 | } | |
b8a9787e | 4117 | |
737aec57 | 4118 | extern const struct kobj_ns_type_operations net_ns_type_operations; |
04600794 | 4119 | |
f629d208 | 4120 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 4121 | |
f629d208 | 4122 | void linkwatch_run_queue(void); |
20380731 | 4123 | |
da08143b MK |
4124 | static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, |
4125 | netdev_features_t f2) | |
4126 | { | |
c8cd0989 TH |
4127 | if ((f1 ^ f2) & NETIF_F_HW_CSUM) { |
4128 | if (f1 & NETIF_F_HW_CSUM) | |
b6a0e72a | 4129 | f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 4130 | else |
b6a0e72a | 4131 | f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 4132 | } |
da08143b | 4133 | |
c8cd0989 | 4134 | return f1 & f2; |
da08143b MK |
4135 | } |
4136 | ||
c8f44aff MM |
4137 | static inline netdev_features_t netdev_get_wanted_features( |
4138 | struct net_device *dev) | |
5455c699 MM |
4139 | { |
4140 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
4141 | } | |
c8f44aff MM |
4142 | netdev_features_t netdev_increment_features(netdev_features_t all, |
4143 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
4144 | |
4145 | /* Allow TSO being used on stacked device : | |
4146 | * Performing the GSO segmentation before last device | |
4147 | * is a performance improvement. | |
4148 | */ | |
4149 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
4150 | netdev_features_t mask) | |
4151 | { | |
4152 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
4153 | } | |
4154 | ||
6cb6a27c | 4155 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 4156 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 4157 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 4158 | |
fc4a7489 PM |
4159 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
4160 | struct net_device *dev); | |
4161 | ||
e38f3025 TM |
4162 | netdev_features_t passthru_features_check(struct sk_buff *skb, |
4163 | struct net_device *dev, | |
4164 | netdev_features_t features); | |
c1e756bf | 4165 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 4166 | |
4d29515f | 4167 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 4168 | { |
7b748340 | 4169 | netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
4170 | |
4171 | /* check flags correspondence */ | |
4172 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
0345e186 MM |
4173 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); |
4174 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
cbc53e08 | 4175 | BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT)); |
0345e186 MM |
4176 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
4177 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4178 | BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); |
4179 | BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); | |
7e13318d TH |
4180 | BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT)); |
4181 | BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4182 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); |
4183 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); | |
802ab55a | 4184 | BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT)); |
e585f236 | 4185 | BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); |
90017acc | 4186 | BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT)); |
c7ef8f0c | 4187 | BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT)); |
0c19f846 | 4188 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT)); |
0345e186 | 4189 | |
d6b4991a | 4190 | return (features & feature) == feature; |
576a30eb HX |
4191 | } |
4192 | ||
4d29515f | 4193 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 4194 | { |
278b2513 | 4195 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 4196 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
4197 | } |
4198 | ||
8b86a61d | 4199 | static inline bool netif_needs_gso(struct sk_buff *skb, |
4d29515f | 4200 | netdev_features_t features) |
7967168c | 4201 | { |
fc741216 | 4202 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
4203 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
4204 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
4205 | } |
4206 | ||
82cc1a7a PWJ |
4207 | static inline void netif_set_gso_max_size(struct net_device *dev, |
4208 | unsigned int size) | |
4209 | { | |
4210 | dev->gso_max_size = size; | |
4211 | } | |
4212 | ||
7a7ffbab WCC |
4213 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
4214 | int pulled_hlen, u16 mac_offset, | |
4215 | int mac_len) | |
4216 | { | |
4217 | skb->protocol = protocol; | |
4218 | skb->encapsulation = 1; | |
4219 | skb_push(skb, pulled_hlen); | |
4220 | skb_reset_transport_header(skb); | |
4221 | skb->mac_header = mac_offset; | |
4222 | skb->network_header = skb->mac_header + mac_len; | |
4223 | skb->mac_len = mac_len; | |
4224 | } | |
4225 | ||
3c175784 SD |
4226 | static inline bool netif_is_macsec(const struct net_device *dev) |
4227 | { | |
4228 | return dev->priv_flags & IFF_MACSEC; | |
4229 | } | |
4230 | ||
b618aaa9 | 4231 | static inline bool netif_is_macvlan(const struct net_device *dev) |
a6cc0cfa JF |
4232 | { |
4233 | return dev->priv_flags & IFF_MACVLAN; | |
4234 | } | |
4235 | ||
b618aaa9 | 4236 | static inline bool netif_is_macvlan_port(const struct net_device *dev) |
2f33e7d5 MB |
4237 | { |
4238 | return dev->priv_flags & IFF_MACVLAN_PORT; | |
4239 | } | |
4240 | ||
b618aaa9 | 4241 | static inline bool netif_is_bond_master(const struct net_device *dev) |
8a7fbfab | 4242 | { |
4243 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
4244 | } | |
4245 | ||
b618aaa9 | 4246 | static inline bool netif_is_bond_slave(const struct net_device *dev) |
1765a575 JP |
4247 | { |
4248 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
4249 | } | |
4250 | ||
3bdc0eba BG |
4251 | static inline bool netif_supports_nofcs(struct net_device *dev) |
4252 | { | |
4253 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
4254 | } | |
4255 | ||
007979ea | 4256 | static inline bool netif_is_l3_master(const struct net_device *dev) |
4e3c8992 | 4257 | { |
007979ea | 4258 | return dev->priv_flags & IFF_L3MDEV_MASTER; |
4e3c8992 DA |
4259 | } |
4260 | ||
fee6d4c7 DA |
4261 | static inline bool netif_is_l3_slave(const struct net_device *dev) |
4262 | { | |
4263 | return dev->priv_flags & IFF_L3MDEV_SLAVE; | |
4264 | } | |
4265 | ||
0894ae3f JP |
4266 | static inline bool netif_is_bridge_master(const struct net_device *dev) |
4267 | { | |
4268 | return dev->priv_flags & IFF_EBRIDGE; | |
4269 | } | |
4270 | ||
28f9ee22 VY |
4271 | static inline bool netif_is_bridge_port(const struct net_device *dev) |
4272 | { | |
4273 | return dev->priv_flags & IFF_BRIDGE_PORT; | |
4274 | } | |
4275 | ||
35d4e172 JP |
4276 | static inline bool netif_is_ovs_master(const struct net_device *dev) |
4277 | { | |
4278 | return dev->priv_flags & IFF_OPENVSWITCH; | |
4279 | } | |
4280 | ||
5be66141 JP |
4281 | static inline bool netif_is_ovs_port(const struct net_device *dev) |
4282 | { | |
4283 | return dev->priv_flags & IFF_OVS_DATAPATH; | |
4284 | } | |
4285 | ||
b618aaa9 | 4286 | static inline bool netif_is_team_master(const struct net_device *dev) |
c981e421 JP |
4287 | { |
4288 | return dev->priv_flags & IFF_TEAM; | |
4289 | } | |
4290 | ||
b618aaa9 | 4291 | static inline bool netif_is_team_port(const struct net_device *dev) |
f7f019ee JP |
4292 | { |
4293 | return dev->priv_flags & IFF_TEAM_PORT; | |
4294 | } | |
4295 | ||
b618aaa9 | 4296 | static inline bool netif_is_lag_master(const struct net_device *dev) |
7be61833 JP |
4297 | { |
4298 | return netif_is_bond_master(dev) || netif_is_team_master(dev); | |
4299 | } | |
4300 | ||
b618aaa9 | 4301 | static inline bool netif_is_lag_port(const struct net_device *dev) |
e0ba1414 JP |
4302 | { |
4303 | return netif_is_bond_slave(dev) || netif_is_team_port(dev); | |
4304 | } | |
4305 | ||
d4ab4286 KJ |
4306 | static inline bool netif_is_rxfh_configured(const struct net_device *dev) |
4307 | { | |
4308 | return dev->priv_flags & IFF_RXFH_CONFIGURED; | |
4309 | } | |
4310 | ||
02875878 ED |
4311 | /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ |
4312 | static inline void netif_keep_dst(struct net_device *dev) | |
4313 | { | |
4314 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM); | |
4315 | } | |
4316 | ||
18d3df3e PA |
4317 | /* return true if dev can't cope with mtu frames that need vlan tag insertion */ |
4318 | static inline bool netif_reduces_vlan_mtu(struct net_device *dev) | |
4319 | { | |
4320 | /* TODO: reserve and use an additional IFF bit, if we get more users */ | |
4321 | return dev->priv_flags & IFF_MACSEC; | |
4322 | } | |
4323 | ||
505d4f73 | 4324 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 4325 | |
571ba423 JP |
4326 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
4327 | ||
4328 | /* netdev_printk helpers, similar to dev_printk */ | |
4329 | ||
4330 | static inline const char *netdev_name(const struct net_device *dev) | |
4331 | { | |
c6f854d5 VF |
4332 | if (!dev->name[0] || strchr(dev->name, '%')) |
4333 | return "(unnamed net_device)"; | |
571ba423 JP |
4334 | return dev->name; |
4335 | } | |
4336 | ||
8397ed36 DA |
4337 | static inline bool netdev_unregistering(const struct net_device *dev) |
4338 | { | |
4339 | return dev->reg_state == NETREG_UNREGISTERING; | |
4340 | } | |
4341 | ||
ccc7f496 VF |
4342 | static inline const char *netdev_reg_state(const struct net_device *dev) |
4343 | { | |
4344 | switch (dev->reg_state) { | |
4345 | case NETREG_UNINITIALIZED: return " (uninitialized)"; | |
4346 | case NETREG_REGISTERED: return ""; | |
4347 | case NETREG_UNREGISTERING: return " (unregistering)"; | |
4348 | case NETREG_UNREGISTERED: return " (unregistered)"; | |
4349 | case NETREG_RELEASED: return " (released)"; | |
4350 | case NETREG_DUMMY: return " (dummy)"; | |
4351 | } | |
4352 | ||
4353 | WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state); | |
4354 | return " (unknown)"; | |
4355 | } | |
4356 | ||
f629d208 | 4357 | __printf(3, 4) |
6ea754eb JP |
4358 | void netdev_printk(const char *level, const struct net_device *dev, |
4359 | const char *format, ...); | |
f629d208 | 4360 | __printf(2, 3) |
6ea754eb | 4361 | void netdev_emerg(const struct net_device *dev, const char *format, ...); |
f629d208 | 4362 | __printf(2, 3) |
6ea754eb | 4363 | void netdev_alert(const struct net_device *dev, const char *format, ...); |
f629d208 | 4364 | __printf(2, 3) |
6ea754eb | 4365 | void netdev_crit(const struct net_device *dev, const char *format, ...); |
f629d208 | 4366 | __printf(2, 3) |
6ea754eb | 4367 | void netdev_err(const struct net_device *dev, const char *format, ...); |
f629d208 | 4368 | __printf(2, 3) |
6ea754eb | 4369 | void netdev_warn(const struct net_device *dev, const char *format, ...); |
f629d208 | 4370 | __printf(2, 3) |
6ea754eb | 4371 | void netdev_notice(const struct net_device *dev, const char *format, ...); |
f629d208 | 4372 | __printf(2, 3) |
6ea754eb | 4373 | void netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 4374 | |
375ef2b1 GP |
4375 | #define netdev_level_once(level, dev, fmt, ...) \ |
4376 | do { \ | |
4377 | static bool __print_once __read_mostly; \ | |
4378 | \ | |
4379 | if (!__print_once) { \ | |
4380 | __print_once = true; \ | |
4381 | netdev_printk(level, dev, fmt, ##__VA_ARGS__); \ | |
4382 | } \ | |
4383 | } while (0) | |
4384 | ||
4385 | #define netdev_emerg_once(dev, fmt, ...) \ | |
4386 | netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__) | |
4387 | #define netdev_alert_once(dev, fmt, ...) \ | |
4388 | netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__) | |
4389 | #define netdev_crit_once(dev, fmt, ...) \ | |
4390 | netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__) | |
4391 | #define netdev_err_once(dev, fmt, ...) \ | |
4392 | netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__) | |
4393 | #define netdev_warn_once(dev, fmt, ...) \ | |
4394 | netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__) | |
4395 | #define netdev_notice_once(dev, fmt, ...) \ | |
4396 | netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__) | |
4397 | #define netdev_info_once(dev, fmt, ...) \ | |
4398 | netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__) | |
4399 | ||
8909c9ad VK |
4400 | #define MODULE_ALIAS_NETDEV(device) \ |
4401 | MODULE_ALIAS("netdev-" device) | |
4402 | ||
b558c96f | 4403 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
4404 | #define netdev_dbg(__dev, format, args...) \ |
4405 | do { \ | |
ffa10cb4 | 4406 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 4407 | } while (0) |
b558c96f JC |
4408 | #elif defined(DEBUG) |
4409 | #define netdev_dbg(__dev, format, args...) \ | |
4410 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
4411 | #else |
4412 | #define netdev_dbg(__dev, format, args...) \ | |
4413 | ({ \ | |
4414 | if (0) \ | |
4415 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
571ba423 JP |
4416 | }) |
4417 | #endif | |
4418 | ||
4419 | #if defined(VERBOSE_DEBUG) | |
4420 | #define netdev_vdbg netdev_dbg | |
4421 | #else | |
4422 | ||
4423 | #define netdev_vdbg(dev, format, args...) \ | |
4424 | ({ \ | |
4425 | if (0) \ | |
4426 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
4427 | 0; \ | |
4428 | }) | |
4429 | #endif | |
4430 | ||
4431 | /* | |
4432 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
4433 | * of using a WARN/WARN_ON to get the message out, including the | |
4434 | * file/line information and a backtrace. | |
4435 | */ | |
4436 | #define netdev_WARN(dev, format, args...) \ | |
e1cfe3d0 | 4437 | WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \ |
ccc7f496 | 4438 | netdev_reg_state(dev), ##args) |
571ba423 | 4439 | |
72dd831e | 4440 | #define netdev_WARN_ONCE(dev, format, args...) \ |
e1cfe3d0 | 4441 | WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \ |
375ef2b1 GP |
4442 | netdev_reg_state(dev), ##args) |
4443 | ||
b3d95c5c JP |
4444 | /* netif printk helpers, similar to netdev_printk */ |
4445 | ||
4446 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
4447 | do { \ | |
4448 | if (netif_msg_##type(priv)) \ | |
4449 | netdev_printk(level, (dev), fmt, ##args); \ | |
4450 | } while (0) | |
4451 | ||
f45f4321 JP |
4452 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
4453 | do { \ | |
4454 | if (netif_msg_##type(priv)) \ | |
4455 | netdev_##level(dev, fmt, ##args); \ | |
4456 | } while (0) | |
4457 | ||
b3d95c5c | 4458 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 4459 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 4460 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 4461 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 4462 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 4463 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 4464 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 4465 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 4466 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 4467 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 4468 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 4469 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 4470 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 4471 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 4472 | |
0053ea9c | 4473 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
4474 | #define netif_dbg(priv, type, netdev, format, args...) \ |
4475 | do { \ | |
4476 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 4477 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 4478 | } while (0) |
0053ea9c JP |
4479 | #elif defined(DEBUG) |
4480 | #define netif_dbg(priv, type, dev, format, args...) \ | |
4481 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
4482 | #else |
4483 | #define netif_dbg(priv, type, dev, format, args...) \ | |
4484 | ({ \ | |
4485 | if (0) \ | |
4486 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
4487 | 0; \ | |
4488 | }) | |
4489 | #endif | |
4490 | ||
f617f276 EC |
4491 | /* if @cond then downgrade to debug, else print at @level */ |
4492 | #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \ | |
4493 | do { \ | |
4494 | if (cond) \ | |
4495 | netif_dbg(priv, type, netdev, fmt, ##args); \ | |
4496 | else \ | |
4497 | netif_ ## level(priv, type, netdev, fmt, ##args); \ | |
4498 | } while (0) | |
4499 | ||
b3d95c5c | 4500 | #if defined(VERBOSE_DEBUG) |
bcfcc450 | 4501 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
4502 | #else |
4503 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
4504 | ({ \ | |
4505 | if (0) \ | |
a4ed89cb | 4506 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
4507 | 0; \ |
4508 | }) | |
4509 | #endif | |
571ba423 | 4510 | |
900ff8c6 CW |
4511 | /* |
4512 | * The list of packet types we will receive (as opposed to discard) | |
4513 | * and the routines to invoke. | |
4514 | * | |
4515 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
4516 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
4517 | * | |
900ff8c6 | 4518 | * 0800 IP |
900ff8c6 CW |
4519 | * 0001 802.3 |
4520 | * 0002 AX.25 | |
4521 | * 0004 802.2 | |
4522 | * 8035 RARP | |
4523 | * 0005 SNAP | |
4524 | * 0805 X.25 | |
4525 | * 0806 ARP | |
4526 | * 8137 IPX | |
4527 | * 0009 Localtalk | |
4528 | * 86DD IPv6 | |
4529 | */ | |
4530 | #define PTYPE_HASH_SIZE (16) | |
4531 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
4532 | ||
385a154c | 4533 | #endif /* _LINUX_NETDEVICE_H */ |