Commit | Line | Data |
---|---|---|
2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
4 | * operating system. INET is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * Definitions for the Interfaces handler. | |
8 | * | |
9 | * Version: @(#)dev.h 1.0.10 08/12/93 | |
10 | * | |
02c30a84 | 11 | * Authors: Ross Biro |
1da177e4 LT |
12 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
13 | * Corey Minyard <wf-rch!minyard@relay.EU.net> | |
14 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> | |
113aa838 | 15 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
16 | * Bjorn Ekwall. <bj0rn@blox.se> |
17 | * Pekka Riikonen <priikone@poseidon.pspt.fi> | |
18 | * | |
1da177e4 LT |
19 | * Moved to /usr/include/linux for NET3 |
20 | */ | |
21 | #ifndef _LINUX_NETDEVICE_H | |
22 | #define _LINUX_NETDEVICE_H | |
23 | ||
d7fe0f24 | 24 | #include <linux/timer.h> |
187f1882 | 25 | #include <linux/bug.h> |
bea3348e | 26 | #include <linux/delay.h> |
60063497 | 27 | #include <linux/atomic.h> |
53511453 | 28 | #include <linux/prefetch.h> |
1da177e4 LT |
29 | #include <asm/cache.h> |
30 | #include <asm/byteorder.h> | |
31 | ||
1da177e4 | 32 | #include <linux/percpu.h> |
4d5b78c0 | 33 | #include <linux/rculist.h> |
bea3348e | 34 | #include <linux/workqueue.h> |
114cf580 | 35 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 36 | |
b1b67dd4 | 37 | #include <linux/ethtool.h> |
a050c33f | 38 | #include <net/net_namespace.h> |
7a6b6f51 | 39 | #ifdef CONFIG_DCB |
2f90b865 AD |
40 | #include <net/dcbnl.h> |
41 | #endif | |
5bc1421e | 42 | #include <net/netprio_cgroup.h> |
e817f856 | 43 | #include <net/xdp.h> |
a050c33f | 44 | |
a59e2ecb | 45 | #include <linux/netdev_features.h> |
77162022 | 46 | #include <linux/neighbour.h> |
607ca46e | 47 | #include <uapi/linux/netdevice.h> |
61bd3857 | 48 | #include <uapi/linux/if_bonding.h> |
e4c6734e | 49 | #include <uapi/linux/pkt_cls.h> |
59cc1f61 | 50 | #include <linux/hashtable.h> |
a59e2ecb | 51 | |
115c1d6e | 52 | struct netpoll_info; |
313162d0 | 53 | struct device; |
c1f19b51 | 54 | struct phy_device; |
2f657a60 | 55 | struct dsa_port; |
607259a6 | 56 | struct ip_tunnel_parm; |
30e9bb84 AT |
57 | struct macsec_context; |
58 | struct macsec_ops; | |
c6e970a0 | 59 | |
e679c9c1 | 60 | struct sfp_bus; |
704232c2 JB |
61 | /* 802.11 specific */ |
62 | struct wireless_dev; | |
98a18b6f AA |
63 | /* 802.15.4 specific */ |
64 | struct wpan_dev; | |
03c57747 | 65 | struct mpls_dev; |
7c46a640 AD |
66 | /* UDP Tunnel offloads */ |
67 | struct udp_tunnel_info; | |
cc4e3835 JK |
68 | struct udp_tunnel_nic_info; |
69 | struct udp_tunnel_nic; | |
a7862b45 | 70 | struct bpf_prog; |
814abfab | 71 | struct xdp_buff; |
1da177e4 | 72 | |
5198d545 | 73 | void synchronize_net(void); |
f629d208 JP |
74 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
75 | const struct ethtool_ops *ops); | |
d07d7507 | 76 | |
9a1654ba JP |
77 | /* Backlog congestion levels */ |
78 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
79 | #define NET_RX_DROP 1 /* packet dropped */ | |
80 | ||
7151affe TY |
81 | #define MAX_NEST_DEV 8 |
82 | ||
572a9d7b PM |
83 | /* |
84 | * Transmit return codes: transmit return codes originate from three different | |
85 | * namespaces: | |
86 | * | |
87 | * - qdisc return codes | |
88 | * - driver transmit return codes | |
89 | * - errno values | |
90 | * | |
91 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
92 | * function. Real network devices commonly used with qdiscs should only return | |
93 | * the driver transmit return codes though - when qdiscs are used, the actual | |
94 | * transmission happens asynchronously, so the value is not propagated to | |
5e82b4b2 BH |
95 | * higher layers. Virtual network devices transmit synchronously; in this case |
96 | * the driver transmit return codes are consumed by dev_queue_xmit(), and all | |
572a9d7b PM |
97 | * others are propagated to higher layers. |
98 | */ | |
99 | ||
100 | /* qdisc ->enqueue() return codes. */ | |
101 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
102 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
103 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
9a1654ba | 104 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
1da177e4 | 105 | |
b9df3cb8 GR |
106 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
107 | * indicates that the device will soon be dropping packets, or already drops | |
108 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 109 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
110 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
111 | ||
dc1f8bf6 | 112 | /* Driver transmit return codes */ |
9a1654ba | 113 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 114 | |
dc1f8bf6 | 115 | enum netdev_tx { |
572a9d7b | 116 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
117 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
118 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
dc1f8bf6 SH |
119 | }; |
120 | typedef enum netdev_tx netdev_tx_t; | |
121 | ||
9a1654ba JP |
122 | /* |
123 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
124 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
125 | */ | |
126 | static inline bool dev_xmit_complete(int rc) | |
127 | { | |
128 | /* | |
129 | * Positive cases with an skb consumed by a driver: | |
130 | * - successful transmission (rc == NETDEV_TX_OK) | |
131 | * - error while transmitting (rc < 0) | |
132 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
133 | */ | |
134 | if (likely(rc < NET_XMIT_MASK)) | |
135 | return true; | |
136 | ||
137 | return false; | |
138 | } | |
139 | ||
1da177e4 | 140 | /* |
5e82b4b2 | 141 | * Compute the worst-case header length according to the protocols |
1da177e4 LT |
142 | * used. |
143 | */ | |
fe2918b0 | 144 | |
c0eb4540 KS |
145 | #if defined(CONFIG_HYPERV_NET) |
146 | # define LL_MAX_HEADER 128 | |
147 | #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) | |
8388e3da DM |
148 | # if defined(CONFIG_MAC80211_MESH) |
149 | # define LL_MAX_HEADER 128 | |
150 | # else | |
151 | # define LL_MAX_HEADER 96 | |
152 | # endif | |
1da177e4 | 153 | #else |
8388e3da | 154 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
155 | #endif |
156 | ||
d11ead75 BH |
157 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
158 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
159 | #define MAX_HEADER LL_MAX_HEADER |
160 | #else | |
161 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
162 | #endif | |
163 | ||
164 | /* | |
be1f3c2c BH |
165 | * Old network device statistics. Fields are native words |
166 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 167 | */ |
fe2918b0 | 168 | |
d94d9fee | 169 | struct net_device_stats { |
3cfde79c BH |
170 | unsigned long rx_packets; |
171 | unsigned long tx_packets; | |
172 | unsigned long rx_bytes; | |
173 | unsigned long tx_bytes; | |
174 | unsigned long rx_errors; | |
175 | unsigned long tx_errors; | |
176 | unsigned long rx_dropped; | |
177 | unsigned long tx_dropped; | |
178 | unsigned long multicast; | |
1da177e4 | 179 | unsigned long collisions; |
1da177e4 | 180 | unsigned long rx_length_errors; |
3cfde79c BH |
181 | unsigned long rx_over_errors; |
182 | unsigned long rx_crc_errors; | |
183 | unsigned long rx_frame_errors; | |
184 | unsigned long rx_fifo_errors; | |
185 | unsigned long rx_missed_errors; | |
1da177e4 LT |
186 | unsigned long tx_aborted_errors; |
187 | unsigned long tx_carrier_errors; | |
188 | unsigned long tx_fifo_errors; | |
189 | unsigned long tx_heartbeat_errors; | |
190 | unsigned long tx_window_errors; | |
1da177e4 LT |
191 | unsigned long rx_compressed; |
192 | unsigned long tx_compressed; | |
193 | }; | |
194 | ||
1da177e4 LT |
195 | |
196 | #include <linux/cache.h> | |
197 | #include <linux/skbuff.h> | |
198 | ||
adc9300e | 199 | #ifdef CONFIG_RPS |
c5905afb | 200 | #include <linux/static_key.h> |
dc05360f ED |
201 | extern struct static_key_false rps_needed; |
202 | extern struct static_key_false rfs_needed; | |
adc9300e ED |
203 | #endif |
204 | ||
1da177e4 LT |
205 | struct neighbour; |
206 | struct neigh_parms; | |
207 | struct sk_buff; | |
208 | ||
f001fde5 JP |
209 | struct netdev_hw_addr { |
210 | struct list_head list; | |
211 | unsigned char addr[MAX_ADDR_LEN]; | |
212 | unsigned char type; | |
ccffad25 JP |
213 | #define NETDEV_HW_ADDR_T_LAN 1 |
214 | #define NETDEV_HW_ADDR_T_SAN 2 | |
215 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
216 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 217 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 218 | bool global_use; |
4cd729b0 | 219 | int sync_cnt; |
8f8f103d | 220 | int refcount; |
4543fbef | 221 | int synced; |
f001fde5 JP |
222 | struct rcu_head rcu_head; |
223 | }; | |
224 | ||
31278e71 JP |
225 | struct netdev_hw_addr_list { |
226 | struct list_head list; | |
227 | int count; | |
228 | }; | |
229 | ||
22bedad3 JP |
230 | #define netdev_hw_addr_list_count(l) ((l)->count) |
231 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
232 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
233 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 234 | |
22bedad3 JP |
235 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
236 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
237 | #define netdev_for_each_uc_addr(ha, dev) \ | |
238 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 239 | |
22bedad3 JP |
240 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
241 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 242 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 243 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 244 | |
d94d9fee | 245 | struct hh_cache { |
5b3dc2f3 | 246 | unsigned int hh_len; |
3644f0ce | 247 | seqlock_t hh_lock; |
1da177e4 LT |
248 | |
249 | /* cached hardware header; allow for machine alignment needs. */ | |
250 | #define HH_DATA_MOD 16 | |
251 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 252 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
253 | #define HH_DATA_ALIGN(__len) \ |
254 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
255 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
256 | }; | |
257 | ||
5e82b4b2 | 258 | /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. |
1da177e4 LT |
259 | * Alternative is: |
260 | * dev->hard_header_len ? (dev->hard_header_len + | |
261 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
262 | * | |
263 | * We could use other alignment values, but we must maintain the | |
264 | * relationship HH alignment <= LL alignment. | |
265 | */ | |
266 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 267 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 268 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 269 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 270 | |
3b04ddde SH |
271 | struct header_ops { |
272 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
273 | unsigned short type, const void *daddr, | |
95c96174 | 274 | const void *saddr, unsigned int len); |
3b04ddde | 275 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
e69dd336 | 276 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
277 | void (*cache_update)(struct hh_cache *hh, |
278 | const struct net_device *dev, | |
279 | const unsigned char *haddr); | |
2793a23a | 280 | bool (*validate)(const char *ll_header, unsigned int len); |
e78b2915 | 281 | __be16 (*parse_protocol)(const struct sk_buff *skb); |
3b04ddde SH |
282 | }; |
283 | ||
1da177e4 | 284 | /* These flag bits are private to the generic network queueing |
5e82b4b2 | 285 | * layer; they may not be explicitly referenced by any other |
1da177e4 LT |
286 | * code. |
287 | */ | |
288 | ||
d94d9fee | 289 | enum netdev_state_t { |
1da177e4 LT |
290 | __LINK_STATE_START, |
291 | __LINK_STATE_PRESENT, | |
1da177e4 | 292 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
293 | __LINK_STATE_LINKWATCH_PENDING, |
294 | __LINK_STATE_DORMANT, | |
eec517cd | 295 | __LINK_STATE_TESTING, |
1da177e4 LT |
296 | }; |
297 | ||
298 | ||
299 | /* | |
5e82b4b2 | 300 | * This structure holds boot-time configured netdevice settings. They |
fe2918b0 | 301 | * are then used in the device probing. |
1da177e4 LT |
302 | */ |
303 | struct netdev_boot_setup { | |
304 | char name[IFNAMSIZ]; | |
305 | struct ifmap map; | |
306 | }; | |
307 | #define NETDEV_BOOT_SETUP_MAX 8 | |
308 | ||
f629d208 | 309 | int __init netdev_boot_setup(char *str); |
1da177e4 | 310 | |
6312fe77 LR |
311 | struct gro_list { |
312 | struct list_head list; | |
313 | int count; | |
314 | }; | |
315 | ||
bea3348e | 316 | /* |
d9f37d01 LR |
317 | * size of gro hash buckets, must less than bit number of |
318 | * napi_struct::gro_bitmask | |
bea3348e | 319 | */ |
07d78363 | 320 | #define GRO_HASH_BUCKETS 8 |
d9f37d01 LR |
321 | |
322 | /* | |
323 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
324 | */ | |
bea3348e SH |
325 | struct napi_struct { |
326 | /* The poll_list must only be managed by the entity which | |
327 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
328 | * whoever atomically sets that bit can add this napi_struct | |
5e82b4b2 | 329 | * to the per-CPU poll_list, and whoever clears that bit |
bea3348e SH |
330 | * can remove from the list right before clearing the bit. |
331 | */ | |
332 | struct list_head poll_list; | |
333 | ||
334 | unsigned long state; | |
335 | int weight; | |
6f8b12d6 | 336 | int defer_hard_irqs_count; |
d9f37d01 | 337 | unsigned long gro_bitmask; |
bea3348e SH |
338 | int (*poll)(struct napi_struct *, int); |
339 | #ifdef CONFIG_NETPOLL | |
bea3348e | 340 | int poll_owner; |
bea3348e | 341 | #endif |
5d38a079 | 342 | struct net_device *dev; |
6312fe77 | 343 | struct gro_list gro_hash[GRO_HASH_BUCKETS]; |
5d38a079 | 344 | struct sk_buff *skb; |
323ebb61 EC |
345 | struct list_head rx_list; /* Pending GRO_NORMAL skbs */ |
346 | int rx_count; /* length of rx_list */ | |
3b47d303 | 347 | struct hrtimer timer; |
404f7c9e | 348 | struct list_head dev_list; |
af12fa6e ET |
349 | struct hlist_node napi_hash_node; |
350 | unsigned int napi_id; | |
bea3348e SH |
351 | }; |
352 | ||
d94d9fee | 353 | enum { |
bea3348e | 354 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
39e6c820 | 355 | NAPI_STATE_MISSED, /* reschedule a napi */ |
a0a46196 | 356 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 357 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
4d092dd2 | 358 | NAPI_STATE_LISTED, /* NAPI added to system lists */ |
d64b5e85 | 359 | NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */ |
217f6974 ED |
360 | NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */ |
361 | }; | |
362 | ||
363 | enum { | |
39e6c820 ED |
364 | NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED), |
365 | NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED), | |
366 | NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE), | |
367 | NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC), | |
4d092dd2 | 368 | NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED), |
39e6c820 ED |
369 | NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL), |
370 | NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL), | |
bea3348e SH |
371 | }; |
372 | ||
5b252f0c | 373 | enum gro_result { |
d1c76af9 HX |
374 | GRO_MERGED, |
375 | GRO_MERGED_FREE, | |
376 | GRO_HELD, | |
377 | GRO_NORMAL, | |
378 | GRO_DROP, | |
25393d3f | 379 | GRO_CONSUMED, |
d1c76af9 | 380 | }; |
5b252f0c | 381 | typedef enum gro_result gro_result_t; |
d1c76af9 | 382 | |
8a4eb573 JP |
383 | /* |
384 | * enum rx_handler_result - Possible return values for rx_handlers. | |
385 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
386 | * further. | |
387 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
388 | * case skb->dev was changed by rx_handler. | |
389 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
5e82b4b2 | 390 | * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. |
8a4eb573 JP |
391 | * |
392 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
393 | * special processing of the skb, prior to delivery to protocol handlers. | |
394 | * | |
395 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
396 | * to register a second rx_handler will return -EBUSY. | |
397 | * | |
398 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
399 | * To unregister a rx_handler on a net_device, use | |
400 | * netdev_rx_handler_unregister(). | |
401 | * | |
402 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
403 | * do with the skb. | |
404 | * | |
5e82b4b2 | 405 | * If the rx_handler consumed the skb in some way, it should return |
8a4eb573 | 406 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
5e82b4b2 | 407 | * the skb to be delivered in some other way. |
8a4eb573 JP |
408 | * |
409 | * If the rx_handler changed skb->dev, to divert the skb to another | |
410 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
411 | * new device will be called if it exists. | |
412 | * | |
5e82b4b2 | 413 | * If the rx_handler decides the skb should be ignored, it should return |
8a4eb573 | 414 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
d93cf068 | 415 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 | 416 | * |
5e82b4b2 | 417 | * If the rx_handler didn't change skb->dev, but wants the skb to be normally |
8a4eb573 JP |
418 | * delivered, it should return RX_HANDLER_PASS. |
419 | * | |
420 | * A device without a registered rx_handler will behave as if rx_handler | |
421 | * returned RX_HANDLER_PASS. | |
422 | */ | |
423 | ||
424 | enum rx_handler_result { | |
425 | RX_HANDLER_CONSUMED, | |
426 | RX_HANDLER_ANOTHER, | |
427 | RX_HANDLER_EXACT, | |
428 | RX_HANDLER_PASS, | |
429 | }; | |
430 | typedef enum rx_handler_result rx_handler_result_t; | |
431 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 432 | |
f629d208 | 433 | void __napi_schedule(struct napi_struct *n); |
bc9ad166 | 434 | void __napi_schedule_irqoff(struct napi_struct *n); |
bea3348e | 435 | |
4d29515f | 436 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
437 | { |
438 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
439 | } | |
440 | ||
39e6c820 | 441 | bool napi_schedule_prep(struct napi_struct *n); |
bea3348e SH |
442 | |
443 | /** | |
444 | * napi_schedule - schedule NAPI poll | |
5e82b4b2 | 445 | * @n: NAPI context |
bea3348e SH |
446 | * |
447 | * Schedule NAPI poll routine to be called if it is not already | |
448 | * running. | |
449 | */ | |
450 | static inline void napi_schedule(struct napi_struct *n) | |
451 | { | |
452 | if (napi_schedule_prep(n)) | |
453 | __napi_schedule(n); | |
454 | } | |
455 | ||
bc9ad166 ED |
456 | /** |
457 | * napi_schedule_irqoff - schedule NAPI poll | |
5e82b4b2 | 458 | * @n: NAPI context |
bc9ad166 ED |
459 | * |
460 | * Variant of napi_schedule(), assuming hard irqs are masked. | |
461 | */ | |
462 | static inline void napi_schedule_irqoff(struct napi_struct *n) | |
463 | { | |
464 | if (napi_schedule_prep(n)) | |
465 | __napi_schedule_irqoff(n); | |
466 | } | |
467 | ||
bfe13f54 | 468 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 469 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
470 | { |
471 | if (napi_schedule_prep(napi)) { | |
472 | __napi_schedule(napi); | |
4d29515f | 473 | return true; |
bfe13f54 | 474 | } |
4d29515f | 475 | return false; |
bfe13f54 RD |
476 | } |
477 | ||
364b6055 | 478 | bool napi_complete_done(struct napi_struct *n, int work_done); |
bea3348e SH |
479 | /** |
480 | * napi_complete - NAPI processing complete | |
5e82b4b2 | 481 | * @n: NAPI context |
bea3348e SH |
482 | * |
483 | * Mark NAPI processing as complete. | |
3b47d303 | 484 | * Consider using napi_complete_done() instead. |
364b6055 | 485 | * Return false if device should avoid rearming interrupts. |
bea3348e | 486 | */ |
364b6055 | 487 | static inline bool napi_complete(struct napi_struct *n) |
3b47d303 ED |
488 | { |
489 | return napi_complete_done(n, 0); | |
490 | } | |
bea3348e SH |
491 | |
492 | /** | |
493 | * napi_disable - prevent NAPI from scheduling | |
5e82b4b2 | 494 | * @n: NAPI context |
bea3348e SH |
495 | * |
496 | * Stop NAPI from being scheduled on this context. | |
497 | * Waits till any outstanding processing completes. | |
498 | */ | |
3b47d303 | 499 | void napi_disable(struct napi_struct *n); |
bea3348e SH |
500 | |
501 | /** | |
502 | * napi_enable - enable NAPI scheduling | |
5e82b4b2 | 503 | * @n: NAPI context |
bea3348e SH |
504 | * |
505 | * Resume NAPI from being scheduled on this context. | |
506 | * Must be paired with napi_disable. | |
507 | */ | |
508 | static inline void napi_enable(struct napi_struct *n) | |
509 | { | |
510 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
4e857c58 | 511 | smp_mb__before_atomic(); |
bea3348e | 512 | clear_bit(NAPI_STATE_SCHED, &n->state); |
2d8bff12 | 513 | clear_bit(NAPI_STATE_NPSVC, &n->state); |
bea3348e SH |
514 | } |
515 | ||
c264c3de SH |
516 | /** |
517 | * napi_synchronize - wait until NAPI is not running | |
5e82b4b2 | 518 | * @n: NAPI context |
c264c3de SH |
519 | * |
520 | * Wait until NAPI is done being scheduled on this context. | |
521 | * Waits till any outstanding processing completes but | |
522 | * does not disable future activations. | |
523 | */ | |
524 | static inline void napi_synchronize(const struct napi_struct *n) | |
525 | { | |
facc432f AB |
526 | if (IS_ENABLED(CONFIG_SMP)) |
527 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
528 | msleep(1); | |
529 | else | |
530 | barrier(); | |
c264c3de | 531 | } |
c264c3de | 532 | |
6c5c9581 MK |
533 | /** |
534 | * napi_if_scheduled_mark_missed - if napi is running, set the | |
535 | * NAPIF_STATE_MISSED | |
536 | * @n: NAPI context | |
537 | * | |
538 | * If napi is running, set the NAPIF_STATE_MISSED, and return true if | |
539 | * NAPI is scheduled. | |
540 | **/ | |
541 | static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n) | |
542 | { | |
543 | unsigned long val, new; | |
544 | ||
545 | do { | |
546 | val = READ_ONCE(n->state); | |
547 | if (val & NAPIF_STATE_DISABLE) | |
548 | return true; | |
549 | ||
550 | if (!(val & NAPIF_STATE_SCHED)) | |
551 | return false; | |
552 | ||
553 | new = val | NAPIF_STATE_MISSED; | |
554 | } while (cmpxchg(&n->state, val, new) != val); | |
555 | ||
556 | return true; | |
557 | } | |
558 | ||
d94d9fee | 559 | enum netdev_queue_state_t { |
73466498 TH |
560 | __QUEUE_STATE_DRV_XOFF, |
561 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 562 | __QUEUE_STATE_FROZEN, |
79d16385 | 563 | }; |
8e2f1a63 DB |
564 | |
565 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) | |
566 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) | |
567 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) | |
568 | ||
569 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) | |
570 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
571 | QUEUE_STATE_FROZEN) | |
572 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ | |
573 | QUEUE_STATE_FROZEN) | |
574 | ||
73466498 TH |
575 | /* |
576 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
577 | * netif_tx_* functions below are used to manipulate this flag. The | |
578 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
579 | * queue independently. The netif_xmit_*stopped functions below are called | |
580 | * to check if the queue has been stopped by the driver or stack (either | |
581 | * of the XOFF bits are set in the state). Drivers should not need to call | |
582 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
583 | */ | |
79d16385 | 584 | |
bb949fbd | 585 | struct netdev_queue { |
6a321cb3 | 586 | /* |
5e82b4b2 | 587 | * read-mostly part |
6a321cb3 | 588 | */ |
bb949fbd | 589 | struct net_device *dev; |
46e5da40 | 590 | struct Qdisc __rcu *qdisc; |
b0e1e646 | 591 | struct Qdisc *qdisc_sleeping; |
ccf5ff69 | 592 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
593 | struct kobject kobj; |
594 | #endif | |
f2cd2d3e ED |
595 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
596 | int numa_node; | |
597 | #endif | |
c0ef079c FW |
598 | unsigned long tx_maxrate; |
599 | /* | |
600 | * Number of TX timeouts for this queue | |
601 | * (/sys/class/net/DEV/Q/trans_timeout) | |
602 | */ | |
603 | unsigned long trans_timeout; | |
ffcfe25b AD |
604 | |
605 | /* Subordinate device that the queue has been assigned to */ | |
606 | struct net_device *sb_dev; | |
661b8d1b | 607 | #ifdef CONFIG_XDP_SOCKETS |
1742b3d5 | 608 | struct xsk_buff_pool *pool; |
661b8d1b | 609 | #endif |
6a321cb3 | 610 | /* |
5e82b4b2 | 611 | * write-mostly part |
6a321cb3 ED |
612 | */ |
613 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
614 | int xmit_lock_owner; | |
9d21493b | 615 | /* |
9b36627a | 616 | * Time (in jiffies) of last Tx |
9d21493b ED |
617 | */ |
618 | unsigned long trans_start; | |
ccf5ff69 | 619 | |
114cf580 TH |
620 | unsigned long state; |
621 | ||
622 | #ifdef CONFIG_BQL | |
623 | struct dql dql; | |
624 | #endif | |
e8a0464c | 625 | } ____cacheline_aligned_in_smp; |
bb949fbd | 626 | |
79134e6c | 627 | extern int sysctl_fb_tunnels_only_for_init_net; |
856c395c | 628 | extern int sysctl_devconf_inherit_init_net; |
79134e6c | 629 | |
316cdaa1 MB |
630 | /* |
631 | * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns | |
632 | * == 1 : For initns only | |
633 | * == 2 : For none. | |
634 | */ | |
79134e6c ED |
635 | static inline bool net_has_fallback_tunnels(const struct net *net) |
636 | { | |
316cdaa1 | 637 | return (net == &init_net && sysctl_fb_tunnels_only_for_init_net == 1) || |
be9fc097 | 638 | !sysctl_fb_tunnels_only_for_init_net; |
79134e6c ED |
639 | } |
640 | ||
f2cd2d3e ED |
641 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
642 | { | |
643 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
644 | return q->numa_node; | |
645 | #else | |
b236da69 | 646 | return NUMA_NO_NODE; |
f2cd2d3e ED |
647 | #endif |
648 | } | |
649 | ||
650 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
651 | { | |
652 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
653 | q->numa_node = node; | |
654 | #endif | |
655 | } | |
656 | ||
df334545 | 657 | #ifdef CONFIG_RPS |
0a9627f2 TH |
658 | /* |
659 | * This structure holds an RPS map which can be of variable length. The | |
660 | * map is an array of CPUs. | |
661 | */ | |
662 | struct rps_map { | |
663 | unsigned int len; | |
664 | struct rcu_head rcu; | |
bb4cf02d | 665 | u16 cpus[]; |
0a9627f2 | 666 | }; |
60b778ce | 667 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 668 | |
fec5e652 | 669 | /* |
c445477d BH |
670 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
671 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
672 | * a hardware filter index. | |
fec5e652 TH |
673 | */ |
674 | struct rps_dev_flow { | |
675 | u16 cpu; | |
c445477d | 676 | u16 filter; |
fec5e652 TH |
677 | unsigned int last_qtail; |
678 | }; | |
c445477d | 679 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
680 | |
681 | /* | |
682 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
683 | */ | |
684 | struct rps_dev_flow_table { | |
685 | unsigned int mask; | |
686 | struct rcu_head rcu; | |
bb4cf02d | 687 | struct rps_dev_flow flows[]; |
fec5e652 TH |
688 | }; |
689 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 690 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
691 | |
692 | /* | |
693 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
694 | * on which they were processed by the application (set in recvmsg). | |
5e82b4b2 BH |
695 | * Each entry is a 32bit value. Upper part is the high-order bits |
696 | * of flow hash, lower part is CPU number. | |
567e4b79 | 697 | * rps_cpu_mask is used to partition the space, depending on number of |
5e82b4b2 BH |
698 | * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1 |
699 | * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f, | |
567e4b79 | 700 | * meaning we use 32-6=26 bits for the hash. |
fec5e652 TH |
701 | */ |
702 | struct rps_sock_flow_table { | |
567e4b79 | 703 | u32 mask; |
93c1af6c | 704 | |
bb4cf02d | 705 | u32 ents[] ____cacheline_aligned_in_smp; |
fec5e652 | 706 | }; |
567e4b79 | 707 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num])) |
fec5e652 TH |
708 | |
709 | #define RPS_NO_CPU 0xffff | |
710 | ||
567e4b79 ED |
711 | extern u32 rps_cpu_mask; |
712 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; | |
713 | ||
fec5e652 TH |
714 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
715 | u32 hash) | |
716 | { | |
717 | if (table && hash) { | |
567e4b79 ED |
718 | unsigned int index = hash & table->mask; |
719 | u32 val = hash & ~rps_cpu_mask; | |
fec5e652 | 720 | |
5e82b4b2 | 721 | /* We only give a hint, preemption can change CPU under us */ |
567e4b79 | 722 | val |= raw_smp_processor_id(); |
fec5e652 | 723 | |
567e4b79 ED |
724 | if (table->ents[index] != val) |
725 | table->ents[index] = val; | |
fec5e652 TH |
726 | } |
727 | } | |
728 | ||
c445477d | 729 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
730 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
731 | u16 filter_id); | |
c445477d | 732 | #endif |
a953be53 | 733 | #endif /* CONFIG_RPS */ |
c445477d | 734 | |
0a9627f2 TH |
735 | /* This structure contains an instance of an RX queue. */ |
736 | struct netdev_rx_queue { | |
a953be53 | 737 | #ifdef CONFIG_RPS |
6e3f7faf ED |
738 | struct rps_map __rcu *rps_map; |
739 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 740 | #endif |
6e3f7faf | 741 | struct kobject kobj; |
fe822240 | 742 | struct net_device *dev; |
e817f856 | 743 | struct xdp_rxq_info xdp_rxq; |
661b8d1b | 744 | #ifdef CONFIG_XDP_SOCKETS |
1742b3d5 | 745 | struct xsk_buff_pool *pool; |
661b8d1b | 746 | #endif |
0a9627f2 | 747 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
748 | |
749 | /* | |
750 | * RX queue sysfs structures and functions. | |
751 | */ | |
752 | struct rx_queue_attribute { | |
753 | struct attribute attr; | |
718ad681 | 754 | ssize_t (*show)(struct netdev_rx_queue *queue, char *buf); |
a953be53 | 755 | ssize_t (*store)(struct netdev_rx_queue *queue, |
718ad681 | 756 | const char *buf, size_t len); |
a953be53 | 757 | }; |
d314774c | 758 | |
bf264145 TH |
759 | #ifdef CONFIG_XPS |
760 | /* | |
761 | * This structure holds an XPS map which can be of variable length. The | |
762 | * map is an array of queues. | |
763 | */ | |
764 | struct xps_map { | |
765 | unsigned int len; | |
766 | unsigned int alloc_len; | |
767 | struct rcu_head rcu; | |
bb4cf02d | 768 | u16 queues[]; |
bf264145 | 769 | }; |
60b778ce | 770 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
c59f419b HD |
771 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ |
772 | - sizeof(struct xps_map)) / sizeof(u16)) | |
bf264145 TH |
773 | |
774 | /* | |
775 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
776 | */ | |
777 | struct xps_dev_maps { | |
778 | struct rcu_head rcu; | |
bb4cf02d | 779 | struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */ |
bf264145 | 780 | }; |
80d19669 AN |
781 | |
782 | #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ | |
184c449f | 783 | (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *))) |
80d19669 AN |
784 | |
785 | #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\ | |
786 | (_rxqs * (_tcs) * sizeof(struct xps_map *))) | |
787 | ||
bf264145 TH |
788 | #endif /* CONFIG_XPS */ |
789 | ||
4f57c087 JF |
790 | #define TC_MAX_QUEUE 16 |
791 | #define TC_BITMASK 15 | |
792 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
793 | struct netdev_tc_txq { | |
794 | u16 count; | |
795 | u16 offset; | |
796 | }; | |
797 | ||
68bad94e NP |
798 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
799 | /* | |
800 | * This structure is to hold information about the device | |
801 | * configured to run FCoE protocol stack. | |
802 | */ | |
803 | struct netdev_fcoe_hbainfo { | |
804 | char manufacturer[64]; | |
805 | char serial_number[64]; | |
806 | char hardware_version[64]; | |
807 | char driver_version[64]; | |
808 | char optionrom_version[64]; | |
809 | char firmware_version[64]; | |
810 | char model[256]; | |
811 | char model_description[256]; | |
812 | }; | |
813 | #endif | |
814 | ||
02637fce | 815 | #define MAX_PHYS_ITEM_ID_LEN 32 |
66b52b0d | 816 | |
02637fce JP |
817 | /* This structure holds a unique identifier to identify some |
818 | * physical item (port for example) used by a netdevice. | |
66b52b0d | 819 | */ |
02637fce JP |
820 | struct netdev_phys_item_id { |
821 | unsigned char id[MAX_PHYS_ITEM_ID_LEN]; | |
66b52b0d JP |
822 | unsigned char id_len; |
823 | }; | |
824 | ||
d754f98b SF |
825 | static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, |
826 | struct netdev_phys_item_id *b) | |
827 | { | |
828 | return a->id_len == b->id_len && | |
829 | memcmp(a->id, b->id, a->id_len) == 0; | |
830 | } | |
831 | ||
99932d4f | 832 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
8ec56fc3 AD |
833 | struct sk_buff *skb, |
834 | struct net_device *sb_dev); | |
99932d4f | 835 | |
2572ac53 | 836 | enum tc_setup_type { |
575ed7d3 | 837 | TC_SETUP_QDISC_MQPRIO, |
a1b7c5fd | 838 | TC_SETUP_CLSU32, |
5b33f488 | 839 | TC_SETUP_CLSFLOWER, |
ade9b658 | 840 | TC_SETUP_CLSMATCHALL, |
332ae8e2 | 841 | TC_SETUP_CLSBPF, |
8c4083b3 | 842 | TC_SETUP_BLOCK, |
8521db4c | 843 | TC_SETUP_QDISC_CBS, |
602f3baf | 844 | TC_SETUP_QDISC_RED, |
7fdb61b4 | 845 | TC_SETUP_QDISC_PRIO, |
f971b132 | 846 | TC_SETUP_QDISC_MQ, |
25db26a9 | 847 | TC_SETUP_QDISC_ETF, |
98b0e5f6 | 848 | TC_SETUP_ROOT_QDISC, |
890d8d23 | 849 | TC_SETUP_QDISC_GRED, |
9c66d156 | 850 | TC_SETUP_QDISC_TAPRIO, |
c29f74e0 | 851 | TC_SETUP_FT, |
d35eb52b | 852 | TC_SETUP_QDISC_ETS, |
ef6aadcc | 853 | TC_SETUP_QDISC_TBF, |
aaca9408 | 854 | TC_SETUP_QDISC_FIFO, |
16e5cc64 JF |
855 | }; |
856 | ||
f4e63525 JK |
857 | /* These structures hold the attributes of bpf state that are being passed |
858 | * to the netdevice through the bpf op. | |
a7862b45 | 859 | */ |
f4e63525 | 860 | enum bpf_netdev_command { |
a7862b45 BB |
861 | /* Set or clear a bpf program used in the earliest stages of packet |
862 | * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee | |
863 | * is responsible for calling bpf_prog_put on any old progs that are | |
864 | * stored. In case of error, the callee need not release the new prog | |
865 | * reference, but on success it takes ownership and must bpf_prog_put | |
866 | * when it is no longer used. | |
867 | */ | |
868 | XDP_SETUP_PROG, | |
ee5d032f | 869 | XDP_SETUP_PROG_HW, |
ab3f0063 | 870 | /* BPF program for offload callbacks, invoked at program load time. */ |
a3884572 JK |
871 | BPF_OFFLOAD_MAP_ALLOC, |
872 | BPF_OFFLOAD_MAP_FREE, | |
1742b3d5 | 873 | XDP_SETUP_XSK_POOL, |
a7862b45 BB |
874 | }; |
875 | ||
cae1927c | 876 | struct bpf_prog_offload_ops; |
ddf9f970 | 877 | struct netlink_ext_ack; |
74515c57 | 878 | struct xdp_umem; |
75ccae62 | 879 | struct xdp_dev_bulk_queue; |
aa8d3a71 | 880 | struct bpf_xdp_link; |
ddf9f970 | 881 | |
7f0a8382 AN |
882 | enum bpf_xdp_mode { |
883 | XDP_MODE_SKB = 0, | |
884 | XDP_MODE_DRV = 1, | |
885 | XDP_MODE_HW = 2, | |
886 | __MAX_XDP_MODE | |
887 | }; | |
888 | ||
889 | struct bpf_xdp_entity { | |
890 | struct bpf_prog *prog; | |
aa8d3a71 | 891 | struct bpf_xdp_link *link; |
7f0a8382 | 892 | }; |
ddf9f970 | 893 | |
f4e63525 JK |
894 | struct netdev_bpf { |
895 | enum bpf_netdev_command command; | |
a7862b45 BB |
896 | union { |
897 | /* XDP_SETUP_PROG */ | |
ddf9f970 | 898 | struct { |
32d60277 | 899 | u32 flags; |
ddf9f970 JK |
900 | struct bpf_prog *prog; |
901 | struct netlink_ext_ack *extack; | |
902 | }; | |
a3884572 JK |
903 | /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */ |
904 | struct { | |
905 | struct bpf_offloaded_map *offmap; | |
906 | }; | |
1742b3d5 | 907 | /* XDP_SETUP_XSK_POOL */ |
74515c57 | 908 | struct { |
1742b3d5 | 909 | struct xsk_buff_pool *pool; |
f8ebfaf6 | 910 | u16 queue_id; |
74515c57 | 911 | } xsk; |
a7862b45 BB |
912 | }; |
913 | }; | |
16e5cc64 | 914 | |
9116e5e2 MK |
915 | /* Flags for ndo_xsk_wakeup. */ |
916 | #define XDP_WAKEUP_RX (1 << 0) | |
917 | #define XDP_WAKEUP_TX (1 << 1) | |
918 | ||
d77e38e6 SK |
919 | #ifdef CONFIG_XFRM_OFFLOAD |
920 | struct xfrmdev_ops { | |
921 | int (*xdo_dev_state_add) (struct xfrm_state *x); | |
922 | void (*xdo_dev_state_delete) (struct xfrm_state *x); | |
923 | void (*xdo_dev_state_free) (struct xfrm_state *x); | |
924 | bool (*xdo_dev_offload_ok) (struct sk_buff *skb, | |
925 | struct xfrm_state *x); | |
50bd870a | 926 | void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); |
d77e38e6 SK |
927 | }; |
928 | #endif | |
929 | ||
6c557001 FW |
930 | struct dev_ifalias { |
931 | struct rcu_head rcuhead; | |
932 | char ifalias[]; | |
933 | }; | |
934 | ||
b473b0d2 | 935 | struct devlink; |
da68b4ad | 936 | struct tlsdev_ops; |
b473b0d2 | 937 | |
ff927412 JP |
938 | struct netdev_name_node { |
939 | struct hlist_node hlist; | |
36fbf1e5 | 940 | struct list_head list; |
ff927412 JP |
941 | struct net_device *dev; |
942 | const char *name; | |
943 | }; | |
944 | ||
36fbf1e5 JP |
945 | int netdev_name_node_alt_create(struct net_device *dev, const char *name); |
946 | int netdev_name_node_alt_destroy(struct net_device *dev, const char *name); | |
947 | ||
93642e14 JP |
948 | struct netdev_net_notifier { |
949 | struct list_head list; | |
950 | struct notifier_block *nb; | |
951 | }; | |
952 | ||
d314774c SH |
953 | /* |
954 | * This structure defines the management hooks for network devices. | |
00829823 SH |
955 | * The following hooks can be defined; unless noted otherwise, they are |
956 | * optional and can be filled with a null pointer. | |
d314774c SH |
957 | * |
958 | * int (*ndo_init)(struct net_device *dev); | |
5e82b4b2 BH |
959 | * This function is called once when a network device is registered. |
960 | * The network device can use this for any late stage initialization | |
961 | * or semantic validation. It can fail with an error code which will | |
962 | * be propagated back to register_netdev. | |
d314774c SH |
963 | * |
964 | * void (*ndo_uninit)(struct net_device *dev); | |
965 | * This function is called when device is unregistered or when registration | |
966 | * fails. It is not called if init fails. | |
967 | * | |
968 | * int (*ndo_open)(struct net_device *dev); | |
5e82b4b2 | 969 | * This function is called when a network device transitions to the up |
d314774c SH |
970 | * state. |
971 | * | |
972 | * int (*ndo_stop)(struct net_device *dev); | |
5e82b4b2 | 973 | * This function is called when a network device transitions to the down |
d314774c SH |
974 | * state. |
975 | * | |
dc1f8bf6 SH |
976 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
977 | * struct net_device *dev); | |
00829823 | 978 | * Called when a packet needs to be transmitted. |
e79d8429 RR |
979 | * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop |
980 | * the queue before that can happen; it's for obsolete devices and weird | |
981 | * corner cases, but the stack really does a non-trivial amount | |
982 | * of useless work if you return NETDEV_TX_BUSY. | |
5e82b4b2 | 983 | * Required; cannot be NULL. |
00829823 | 984 | * |
1a2a1444 DM |
985 | * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
986 | * struct net_device *dev | |
987 | * netdev_features_t features); | |
988 | * Called by core transmit path to determine if device is capable of | |
989 | * performing offload operations on a given packet. This is to give | |
990 | * the device an opportunity to implement any restrictions that cannot | |
991 | * be otherwise expressed by feature flags. The check is called with | |
992 | * the set of features that the stack has calculated and it returns | |
993 | * those the driver believes to be appropriate. | |
cdba756f | 994 | * |
f663dd9a | 995 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
a350ecce | 996 | * struct net_device *sb_dev); |
5e82b4b2 | 997 | * Called to decide which queue to use when device supports multiple |
00829823 SH |
998 | * transmit queues. |
999 | * | |
d314774c SH |
1000 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
1001 | * This function is called to allow device receiver to make | |
5e82b4b2 | 1002 | * changes to configuration when multicast or promiscuous is enabled. |
d314774c SH |
1003 | * |
1004 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
1005 | * This function is called device changes address list filtering. | |
01789349 | 1006 | * If driver handles unicast address filtering, it should set |
5e82b4b2 | 1007 | * IFF_UNICAST_FLT in its priv_flags. |
d314774c SH |
1008 | * |
1009 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
1010 | * This function is called when the Media Access Control address | |
37b607c5 | 1011 | * needs to be changed. If this interface is not defined, the |
5e82b4b2 | 1012 | * MAC address can not be changed. |
d314774c SH |
1013 | * |
1014 | * int (*ndo_validate_addr)(struct net_device *dev); | |
1015 | * Test if Media Access Control address is valid for the device. | |
1016 | * | |
1017 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
5e82b4b2 BH |
1018 | * Called when a user requests an ioctl which can't be handled by |
1019 | * the generic interface code. If not defined ioctls return | |
d314774c SH |
1020 | * not supported error code. |
1021 | * | |
1022 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
1023 | * Used to set network devices bus interface parameters. This interface | |
5e82b4b2 | 1024 | * is retained for legacy reasons; new devices should use the bus |
d314774c SH |
1025 | * interface (PCI) for low level management. |
1026 | * | |
1027 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
1028 | * Called when a user wants to change the Maximum Transfer Unit | |
db46a0e1 | 1029 | * of a device. |
d314774c | 1030 | * |
0290bd29 | 1031 | * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue); |
5e82b4b2 | 1032 | * Callback used when the transmitter has not made any progress |
d314774c SH |
1033 | * for dev->watchdog ticks. |
1034 | * | |
bc1f4470 | 1035 | * void (*ndo_get_stats64)(struct net_device *dev, |
1036 | * struct rtnl_link_stats64 *storage); | |
d308e38f | 1037 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 1038 | * Called when a user wants to get the network device usage |
be1f3c2c | 1039 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
1040 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
1041 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 1042 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
1043 | * (which should normally be dev->stats) and return a pointer to |
1044 | * it. The structure may be changed asynchronously only if each | |
1045 | * field is written atomically. | |
1046 | * 3. Update dev->stats asynchronously and atomically, and define | |
1047 | * neither operation. | |
d314774c | 1048 | * |
3df5b3c6 | 1049 | * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) |
2c9d85d4 NF |
1050 | * Return true if this device supports offload stats of this attr_id. |
1051 | * | |
1052 | * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, | |
1053 | * void *attr_data) | |
1054 | * Get statistics for offload operations by attr_id. Write it into the | |
1055 | * attr_data pointer. | |
1056 | * | |
5d632cb7 | 1057 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 1058 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 1059 | * VLAN id is registered. |
d314774c | 1060 | * |
5d632cb7 | 1061 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 1062 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 1063 | * VLAN id is unregistered. |
d314774c SH |
1064 | * |
1065 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
1066 | * |
1067 | * SR-IOV management functions. | |
1068 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
79aab093 MS |
1069 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, |
1070 | * u8 qos, __be16 proto); | |
ed616689 SC |
1071 | * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
1072 | * int max_tx_rate); | |
5f8444a3 | 1073 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
dd461d6a | 1074 | * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
1075 | * int (*ndo_get_vf_config)(struct net_device *dev, |
1076 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 1077 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
1078 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
1079 | * struct nlattr *port[]); | |
01a3d796 VZ |
1080 | * |
1081 | * Enable or disable the VF ability to query its RSS Redirection Table and | |
1082 | * Hash Key. This is needed since on some devices VF share this information | |
5e82b4b2 | 1083 | * with PF and querying it may introduce a theoretical security risk. |
01a3d796 | 1084 | * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); |
57b61080 | 1085 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
2572ac53 | 1086 | * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, |
de4784ca | 1087 | * void *type_data); |
6a4bc2b4 FF |
1088 | * Called to setup any 'tc' scheduler, classifier or action on @dev. |
1089 | * This is always called from the stack with the rtnl lock held and netif | |
1090 | * tx queues stopped. This allows the netdevice to perform queue | |
1091 | * management safely. | |
c445477d | 1092 | * |
e9bce845 YZ |
1093 | * Fiber Channel over Ethernet (FCoE) offload functions. |
1094 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
1095 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
1096 | * so the underlying device can perform whatever needed configuration or | |
1097 | * initialization to support acceleration of FCoE traffic. | |
1098 | * | |
1099 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
1100 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
1101 | * so the underlying device can perform whatever needed clean-ups to | |
1102 | * stop supporting acceleration of FCoE traffic. | |
1103 | * | |
1104 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
1105 | * struct scatterlist *sgl, unsigned int sgc); | |
1106 | * Called when the FCoE Initiator wants to initialize an I/O that | |
1107 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
1108 | * perform necessary setup and returns 1 to indicate the device is set up | |
1109 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
1110 | * | |
1111 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
1112 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
1113 | * indicated by the FC exchange id 'xid', so the underlying device can | |
1114 | * clean up and reuse resources for later DDP requests. | |
1115 | * | |
1116 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
1117 | * struct scatterlist *sgl, unsigned int sgc); | |
1118 | * Called when the FCoE Target wants to initialize an I/O that | |
1119 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
1120 | * perform necessary setup and returns 1 to indicate the device is set up | |
1121 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
1122 | * | |
68bad94e NP |
1123 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1124 | * struct netdev_fcoe_hbainfo *hbainfo); | |
1125 | * Called when the FCoE Protocol stack wants information on the underlying | |
1126 | * device. This information is utilized by the FCoE protocol stack to | |
1127 | * register attributes with Fiber Channel management service as per the | |
1128 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
1129 | * | |
e9bce845 YZ |
1130 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
1131 | * Called when the underlying device wants to override default World Wide | |
1132 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
1133 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
1134 | * protocol stack to use. | |
1135 | * | |
c445477d BH |
1136 | * RFS acceleration. |
1137 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
1138 | * u16 rxq_index, u32 flow_id); | |
1139 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
1140 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
1141 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 1142 | * |
8b98a70c | 1143 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
1144 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
1145 | * Called to make another netdev an underling. | |
1146 | * | |
1147 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
1148 | * Called to release previously enslaved netdev. | |
5455c699 | 1149 | * |
cff9f12b MG |
1150 | * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev, |
1151 | * struct sk_buff *skb, | |
1152 | * bool all_slaves); | |
1153 | * Get the xmit slave of master device. If all_slaves is true, function | |
1154 | * assume all the slaves can transmit. | |
1155 | * | |
5455c699 | 1156 | * Feature/offload setting functions. |
1a2a1444 DM |
1157 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1158 | * netdev_features_t features); | |
1159 | * Adjusts the requested feature flags according to device-specific | |
1160 | * constraints, and returns the resulting flags. Must not modify | |
1161 | * the device state. | |
1162 | * | |
c8f44aff | 1163 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
1164 | * Called to update device configuration to new features. Passed |
1165 | * feature set might be less than what was returned by ndo_fix_features()). | |
1166 | * Must return >0 or -errno if it changed dev->features itself. | |
1167 | * | |
edc7d573 | 1168 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
1169 | * struct net_device *dev, | |
87b0984e PM |
1170 | * const unsigned char *addr, u16 vid, u16 flags, |
1171 | * struct netlink_ext_ack *extack); | |
77162022 | 1172 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
1173 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
1174 | * struct net_device *dev, | |
f6f6424b | 1175 | * const unsigned char *addr, u16 vid) |
77162022 JF |
1176 | * Deletes the FDB entry from dev coresponding to addr. |
1177 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 1178 | * struct net_device *dev, struct net_device *filter_dev, |
d297653d | 1179 | * int *idx) |
77162022 JF |
1180 | * Used to add FDB entries to dump requests. Implementers should add |
1181 | * entries to skb and update idx with the number of entries. | |
e5a55a89 | 1182 | * |
ad41faa8 | 1183 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, |
2fd527b7 | 1184 | * u16 flags, struct netlink_ext_ack *extack) |
e5a55a89 | 1185 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
46c264da ND |
1186 | * struct net_device *dev, u32 filter_mask, |
1187 | * int nlflags) | |
ad41faa8 ND |
1188 | * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, |
1189 | * u16 flags); | |
4bf84c35 JP |
1190 | * |
1191 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
1192 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
1193 | * which do not represent real hardware may define this to allow their | |
1194 | * userspace components to manage their virtual carrier state. Devices | |
1195 | * that determine carrier state from physical hardware properties (eg | |
1196 | * network cables) or protocol-dependent mechanisms (eg | |
1197 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
1198 | * |
1199 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
02637fce | 1200 | * struct netdev_phys_item_id *ppid); |
66b52b0d JP |
1201 | * Called to get ID of physical port of this device. If driver does |
1202 | * not implement this, it is assumed that the hw is not able to have | |
1203 | * multiple net devices on single physical port. | |
53cf5275 | 1204 | * |
d6abc596 FF |
1205 | * int (*ndo_get_port_parent_id)(struct net_device *dev, |
1206 | * struct netdev_phys_item_id *ppid) | |
1207 | * Called to get the parent ID of the physical port of this device. | |
1208 | * | |
7c46a640 AD |
1209 | * void (*ndo_udp_tunnel_add)(struct net_device *dev, |
1210 | * struct udp_tunnel_info *ti); | |
1211 | * Called by UDP tunnel to notify a driver about the UDP port and socket | |
1212 | * address family that a UDP tunnel is listnening to. It is called only | |
1213 | * when a new port starts listening. The operation is protected by the | |
1214 | * RTNL. | |
1215 | * | |
1216 | * void (*ndo_udp_tunnel_del)(struct net_device *dev, | |
1217 | * struct udp_tunnel_info *ti); | |
1218 | * Called by UDP tunnel to notify the driver about a UDP port and socket | |
1219 | * address family that the UDP tunnel is not listening to anymore. The | |
1220 | * operation is protected by the RTNL. | |
1221 | * | |
a6cc0cfa JF |
1222 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1223 | * struct net_device *dev) | |
1224 | * Called by upper layer devices to accelerate switching or other | |
1225 | * station functionality into hardware. 'pdev is the lowerdev | |
1226 | * to use for the offload and 'dev' is the net device that will | |
1227 | * back the offload. Returns a pointer to the private structure | |
1228 | * the upper layer will maintain. | |
1229 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
1230 | * Called by upper layer device to delete the station created | |
1231 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
1232 | * the station and priv is the structure returned by the add | |
1233 | * operation. | |
822b3b2e JF |
1234 | * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1235 | * int queue_index, u32 maxrate); | |
1236 | * Called when a user wants to set a max-rate limitation of specific | |
1237 | * TX queue. | |
a54acb3a ND |
1238 | * int (*ndo_get_iflink)(const struct net_device *dev); |
1239 | * Called to get the iflink value of this device. | |
d746d707 | 1240 | * void (*ndo_change_proto_down)(struct net_device *dev, |
5e82b4b2 | 1241 | * bool proto_down); |
d746d707 AK |
1242 | * This function is used to pass protocol port error state information |
1243 | * to the switch driver. The switch driver can react to the proto_down | |
1244 | * by doing a phys down on the associated switch port. | |
fc4099f1 PS |
1245 | * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); |
1246 | * This function is used to get egress tunnel information for given skb. | |
1247 | * This is useful for retrieving outer tunnel header parameters while | |
1248 | * sampling packet. | |
871b642a PA |
1249 | * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); |
1250 | * This function is used to specify the headroom that the skb must | |
1251 | * consider when allocation skb during packet reception. Setting | |
1252 | * appropriate rx headroom value allows avoiding skb head copy on | |
5e82b4b2 | 1253 | * forward. Setting a negative value resets the rx headroom to the |
871b642a | 1254 | * default value. |
f4e63525 | 1255 | * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf); |
a7862b45 | 1256 | * This function is used to set or query state related to XDP on the |
f4e63525 JK |
1257 | * netdevice and manage BPF offload. See definition of |
1258 | * enum bpf_netdev_command for details. | |
42b33468 JDB |
1259 | * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp, |
1260 | * u32 flags); | |
735fc405 JDB |
1261 | * This function is used to submit @n XDP packets for transmit on a |
1262 | * netdevice. Returns number of frames successfully transmitted, frames | |
1263 | * that got dropped are freed/returned via xdp_return_frame(). | |
1264 | * Returns negative number, means general error invoking ndo, meaning | |
1265 | * no frames were xmit'ed and core-caller will free all frames. | |
9116e5e2 MK |
1266 | * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags); |
1267 | * This function is used to wake up the softirq, ksoftirqd or kthread | |
1268 | * responsible for sending and/or receiving packets on a specific | |
1269 | * queue id bound to an AF_XDP socket. The flags field specifies if | |
1270 | * only RX, only Tx, or both should be woken up using the flags | |
1271 | * XDP_WAKEUP_RX and XDP_WAKEUP_TX. | |
5dc37bb9 JP |
1272 | * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev); |
1273 | * Get devlink port instance associated with a given netdev. | |
b473b0d2 JK |
1274 | * Called with a reference on the netdevice and devlink locks only, |
1275 | * rtnl_lock is not held. | |
607259a6 CH |
1276 | * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p, |
1277 | * int cmd); | |
1278 | * Add, change, delete or get information on an IPv4 tunnel. | |
d314774c SH |
1279 | */ |
1280 | struct net_device_ops { | |
1281 | int (*ndo_init)(struct net_device *dev); | |
1282 | void (*ndo_uninit)(struct net_device *dev); | |
1283 | int (*ndo_open)(struct net_device *dev); | |
1284 | int (*ndo_stop)(struct net_device *dev); | |
cdba756f ED |
1285 | netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
1286 | struct net_device *dev); | |
1287 | netdev_features_t (*ndo_features_check)(struct sk_buff *skb, | |
1288 | struct net_device *dev, | |
1289 | netdev_features_t features); | |
00829823 | 1290 | u16 (*ndo_select_queue)(struct net_device *dev, |
f663dd9a | 1291 | struct sk_buff *skb, |
a350ecce | 1292 | struct net_device *sb_dev); |
d314774c SH |
1293 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1294 | int flags); | |
d314774c | 1295 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1296 | int (*ndo_set_mac_address)(struct net_device *dev, |
1297 | void *addr); | |
d314774c | 1298 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1299 | int (*ndo_do_ioctl)(struct net_device *dev, |
1300 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1301 | int (*ndo_set_config)(struct net_device *dev, |
1302 | struct ifmap *map); | |
00829823 SH |
1303 | int (*ndo_change_mtu)(struct net_device *dev, |
1304 | int new_mtu); | |
1305 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1306 | struct neigh_parms *); | |
0290bd29 MT |
1307 | void (*ndo_tx_timeout) (struct net_device *dev, |
1308 | unsigned int txqueue); | |
d314774c | 1309 | |
bc1f4470 | 1310 | void (*ndo_get_stats64)(struct net_device *dev, |
1311 | struct rtnl_link_stats64 *storage); | |
3df5b3c6 | 1312 | bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); |
2c9d85d4 NF |
1313 | int (*ndo_get_offload_stats)(int attr_id, |
1314 | const struct net_device *dev, | |
1315 | void *attr_data); | |
d314774c SH |
1316 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1317 | ||
8e586137 | 1318 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1319 | __be16 proto, u16 vid); |
8e586137 | 1320 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1321 | __be16 proto, u16 vid); |
d314774c | 1322 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1323 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1324 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1325 | struct netpoll_info *info); |
0e34e931 | 1326 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
d314774c | 1327 | #endif |
95c26df8 WM |
1328 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1329 | int queue, u8 *mac); | |
1330 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
79aab093 MS |
1331 | int queue, u16 vlan, |
1332 | u8 qos, __be16 proto); | |
ed616689 SC |
1333 | int (*ndo_set_vf_rate)(struct net_device *dev, |
1334 | int vf, int min_tx_rate, | |
1335 | int max_tx_rate); | |
5f8444a3 GR |
1336 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1337 | int vf, bool setting); | |
dd461d6a HS |
1338 | int (*ndo_set_vf_trust)(struct net_device *dev, |
1339 | int vf, bool setting); | |
95c26df8 WM |
1340 | int (*ndo_get_vf_config)(struct net_device *dev, |
1341 | int vf, | |
1342 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1343 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1344 | int vf, int link_state); | |
3b766cd8 EBE |
1345 | int (*ndo_get_vf_stats)(struct net_device *dev, |
1346 | int vf, | |
1347 | struct ifla_vf_stats | |
1348 | *vf_stats); | |
57b61080 SF |
1349 | int (*ndo_set_vf_port)(struct net_device *dev, |
1350 | int vf, | |
1351 | struct nlattr *port[]); | |
1352 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1353 | int vf, struct sk_buff *skb); | |
30aad417 DG |
1354 | int (*ndo_get_vf_guid)(struct net_device *dev, |
1355 | int vf, | |
1356 | struct ifla_vf_guid *node_guid, | |
1357 | struct ifla_vf_guid *port_guid); | |
cc8e27cc EC |
1358 | int (*ndo_set_vf_guid)(struct net_device *dev, |
1359 | int vf, u64 guid, | |
1360 | int guid_type); | |
01a3d796 VZ |
1361 | int (*ndo_set_vf_rss_query_en)( |
1362 | struct net_device *dev, | |
1363 | int vf, bool setting); | |
16e5cc64 | 1364 | int (*ndo_setup_tc)(struct net_device *dev, |
2572ac53 | 1365 | enum tc_setup_type type, |
de4784ca | 1366 | void *type_data); |
d11ead75 | 1367 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1368 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1369 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1370 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1371 | u16 xid, | |
1372 | struct scatterlist *sgl, | |
1373 | unsigned int sgc); | |
1374 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1375 | u16 xid); | |
6247e086 YZ |
1376 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1377 | u16 xid, | |
1378 | struct scatterlist *sgl, | |
1379 | unsigned int sgc); | |
68bad94e NP |
1380 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1381 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1382 | #endif |
1383 | ||
d11ead75 | 1384 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1385 | #define NETDEV_FCOE_WWNN 0 |
1386 | #define NETDEV_FCOE_WWPN 1 | |
1387 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1388 | u64 *wwn, int type); | |
4d288d57 | 1389 | #endif |
3c9c36bc | 1390 | |
c445477d BH |
1391 | #ifdef CONFIG_RFS_ACCEL |
1392 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1393 | const struct sk_buff *skb, | |
1394 | u16 rxq_index, | |
1395 | u32 flow_id); | |
1396 | #endif | |
fbaec0ea | 1397 | int (*ndo_add_slave)(struct net_device *dev, |
33eaf2a6 DA |
1398 | struct net_device *slave_dev, |
1399 | struct netlink_ext_ack *extack); | |
fbaec0ea JP |
1400 | int (*ndo_del_slave)(struct net_device *dev, |
1401 | struct net_device *slave_dev); | |
cff9f12b MG |
1402 | struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev, |
1403 | struct sk_buff *skb, | |
1404 | bool all_slaves); | |
c8f44aff MM |
1405 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1406 | netdev_features_t features); | |
5455c699 | 1407 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1408 | netdev_features_t features); |
503eebc2 JP |
1409 | int (*ndo_neigh_construct)(struct net_device *dev, |
1410 | struct neighbour *n); | |
1411 | void (*ndo_neigh_destroy)(struct net_device *dev, | |
1412 | struct neighbour *n); | |
77162022 JF |
1413 | |
1414 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1415 | struct nlattr *tb[], |
77162022 | 1416 | struct net_device *dev, |
6b6e2725 | 1417 | const unsigned char *addr, |
f6f6424b | 1418 | u16 vid, |
87b0984e PM |
1419 | u16 flags, |
1420 | struct netlink_ext_ack *extack); | |
77162022 | 1421 | int (*ndo_fdb_del)(struct ndmsg *ndm, |
1690be63 | 1422 | struct nlattr *tb[], |
77162022 | 1423 | struct net_device *dev, |
f6f6424b JP |
1424 | const unsigned char *addr, |
1425 | u16 vid); | |
77162022 JF |
1426 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1427 | struct netlink_callback *cb, | |
1428 | struct net_device *dev, | |
5d5eacb3 | 1429 | struct net_device *filter_dev, |
d297653d | 1430 | int *idx); |
5b2f94b2 RP |
1431 | int (*ndo_fdb_get)(struct sk_buff *skb, |
1432 | struct nlattr *tb[], | |
1433 | struct net_device *dev, | |
1434 | const unsigned char *addr, | |
1435 | u16 vid, u32 portid, u32 seq, | |
1436 | struct netlink_ext_ack *extack); | |
e5a55a89 | 1437 | int (*ndo_bridge_setlink)(struct net_device *dev, |
add511b3 | 1438 | struct nlmsghdr *nlh, |
2fd527b7 PM |
1439 | u16 flags, |
1440 | struct netlink_ext_ack *extack); | |
e5a55a89 JF |
1441 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1442 | u32 pid, u32 seq, | |
6cbdceeb | 1443 | struct net_device *dev, |
46c264da ND |
1444 | u32 filter_mask, |
1445 | int nlflags); | |
407af329 | 1446 | int (*ndo_bridge_dellink)(struct net_device *dev, |
add511b3 RP |
1447 | struct nlmsghdr *nlh, |
1448 | u16 flags); | |
4bf84c35 JP |
1449 | int (*ndo_change_carrier)(struct net_device *dev, |
1450 | bool new_carrier); | |
66b52b0d | 1451 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
02637fce | 1452 | struct netdev_phys_item_id *ppid); |
d6abc596 FF |
1453 | int (*ndo_get_port_parent_id)(struct net_device *dev, |
1454 | struct netdev_phys_item_id *ppid); | |
db24a904 DA |
1455 | int (*ndo_get_phys_port_name)(struct net_device *dev, |
1456 | char *name, size_t len); | |
7c46a640 AD |
1457 | void (*ndo_udp_tunnel_add)(struct net_device *dev, |
1458 | struct udp_tunnel_info *ti); | |
1459 | void (*ndo_udp_tunnel_del)(struct net_device *dev, | |
1460 | struct udp_tunnel_info *ti); | |
a6cc0cfa JF |
1461 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1462 | struct net_device *dev); | |
1463 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1464 | void *priv); | |
1465 | ||
822b3b2e JF |
1466 | int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1467 | int queue_index, | |
1468 | u32 maxrate); | |
a54acb3a | 1469 | int (*ndo_get_iflink)(const struct net_device *dev); |
d746d707 AK |
1470 | int (*ndo_change_proto_down)(struct net_device *dev, |
1471 | bool proto_down); | |
fc4099f1 PS |
1472 | int (*ndo_fill_metadata_dst)(struct net_device *dev, |
1473 | struct sk_buff *skb); | |
871b642a PA |
1474 | void (*ndo_set_rx_headroom)(struct net_device *dev, |
1475 | int needed_headroom); | |
f4e63525 JK |
1476 | int (*ndo_bpf)(struct net_device *dev, |
1477 | struct netdev_bpf *bpf); | |
735fc405 | 1478 | int (*ndo_xdp_xmit)(struct net_device *dev, int n, |
42b33468 JDB |
1479 | struct xdp_frame **xdp, |
1480 | u32 flags); | |
9116e5e2 MK |
1481 | int (*ndo_xsk_wakeup)(struct net_device *dev, |
1482 | u32 queue_id, u32 flags); | |
5dc37bb9 | 1483 | struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev); |
607259a6 CH |
1484 | int (*ndo_tunnel_ctl)(struct net_device *dev, |
1485 | struct ip_tunnel_parm *p, int cmd); | |
d314774c SH |
1486 | }; |
1487 | ||
7aa98047 LR |
1488 | /** |
1489 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1490 | * | |
1491 | * These are the &struct net_device, they are only set internally | |
1492 | * by drivers and used in the kernel. These flags are invisible to | |
5e82b4b2 | 1493 | * userspace; this means that the order of these flags can change |
7aa98047 LR |
1494 | * during any kernel release. |
1495 | * | |
1496 | * You should have a pretty good reason to be extending these flags. | |
1497 | * | |
1498 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1499 | * @IFF_EBRIDGE: Ethernet bridging device | |
7aa98047 | 1500 | * @IFF_BONDING: bonding master or slave |
7aa98047 | 1501 | * @IFF_ISATAP: ISATAP interface (RFC4214) |
7aa98047 LR |
1502 | * @IFF_WAN_HDLC: WAN HDLC device |
1503 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1504 | * release skb->dst | |
1505 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1506 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1507 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1508 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1509 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1510 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1511 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1512 | * @IFF_TEAM_PORT: device used as team port | |
1513 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1514 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1515 | * change when it's running | |
1516 | * @IFF_MACVLAN: Macvlan device | |
6d0e24cd LB |
1517 | * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account |
1518 | * underlying stacked devices | |
007979ea | 1519 | * @IFF_L3MDEV_MASTER: device is an L3 master device |
fa8187c9 | 1520 | * @IFF_NO_QUEUE: device can run without qdisc attached |
35d4e172 | 1521 | * @IFF_OPENVSWITCH: device is a Open vSwitch master |
fee6d4c7 | 1522 | * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device |
c981e421 | 1523 | * @IFF_TEAM: device is a team device |
d4ab4286 | 1524 | * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured |
871b642a PA |
1525 | * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external |
1526 | * entity (i.e. the master device for bridged veth) | |
3c175784 | 1527 | * @IFF_MACSEC: device is a MACsec device |
f5426250 | 1528 | * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook |
30c8bd5a SS |
1529 | * @IFF_FAILOVER: device is a failover master device |
1530 | * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device | |
d5256083 | 1531 | * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device |
8065a779 | 1532 | * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running |
7aa98047 LR |
1533 | */ |
1534 | enum netdev_priv_flags { | |
1535 | IFF_802_1Q_VLAN = 1<<0, | |
1536 | IFF_EBRIDGE = 1<<1, | |
0dc1549b JP |
1537 | IFF_BONDING = 1<<2, |
1538 | IFF_ISATAP = 1<<3, | |
1539 | IFF_WAN_HDLC = 1<<4, | |
1540 | IFF_XMIT_DST_RELEASE = 1<<5, | |
1541 | IFF_DONT_BRIDGE = 1<<6, | |
1542 | IFF_DISABLE_NETPOLL = 1<<7, | |
1543 | IFF_MACVLAN_PORT = 1<<8, | |
1544 | IFF_BRIDGE_PORT = 1<<9, | |
1545 | IFF_OVS_DATAPATH = 1<<10, | |
1546 | IFF_TX_SKB_SHARING = 1<<11, | |
1547 | IFF_UNICAST_FLT = 1<<12, | |
1548 | IFF_TEAM_PORT = 1<<13, | |
1549 | IFF_SUPP_NOFCS = 1<<14, | |
1550 | IFF_LIVE_ADDR_CHANGE = 1<<15, | |
1551 | IFF_MACVLAN = 1<<16, | |
1552 | IFF_XMIT_DST_RELEASE_PERM = 1<<17, | |
1ec54cb4 PA |
1553 | IFF_L3MDEV_MASTER = 1<<18, |
1554 | IFF_NO_QUEUE = 1<<19, | |
1555 | IFF_OPENVSWITCH = 1<<20, | |
1556 | IFF_L3MDEV_SLAVE = 1<<21, | |
1557 | IFF_TEAM = 1<<22, | |
1558 | IFF_RXFH_CONFIGURED = 1<<23, | |
1559 | IFF_PHONY_HEADROOM = 1<<24, | |
1560 | IFF_MACSEC = 1<<25, | |
f5426250 | 1561 | IFF_NO_RX_HANDLER = 1<<26, |
30c8bd5a SS |
1562 | IFF_FAILOVER = 1<<27, |
1563 | IFF_FAILOVER_SLAVE = 1<<28, | |
d5256083 | 1564 | IFF_L3MDEV_RX_HANDLER = 1<<29, |
8065a779 | 1565 | IFF_LIVE_RENAME_OK = 1<<30, |
7aa98047 LR |
1566 | }; |
1567 | ||
1568 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1569 | #define IFF_EBRIDGE IFF_EBRIDGE | |
7aa98047 | 1570 | #define IFF_BONDING IFF_BONDING |
7aa98047 | 1571 | #define IFF_ISATAP IFF_ISATAP |
7aa98047 LR |
1572 | #define IFF_WAN_HDLC IFF_WAN_HDLC |
1573 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1574 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1575 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1576 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1577 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1578 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1579 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1580 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1581 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1582 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1583 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1584 | #define IFF_MACVLAN IFF_MACVLAN | |
02875878 | 1585 | #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
007979ea | 1586 | #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER |
fa8187c9 | 1587 | #define IFF_NO_QUEUE IFF_NO_QUEUE |
35d4e172 | 1588 | #define IFF_OPENVSWITCH IFF_OPENVSWITCH |
8f25348b | 1589 | #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE |
c981e421 | 1590 | #define IFF_TEAM IFF_TEAM |
d4ab4286 | 1591 | #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED |
3c175784 | 1592 | #define IFF_MACSEC IFF_MACSEC |
f5426250 | 1593 | #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER |
30c8bd5a SS |
1594 | #define IFF_FAILOVER IFF_FAILOVER |
1595 | #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE | |
d5256083 | 1596 | #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER |
8065a779 | 1597 | #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK |
7aa98047 | 1598 | |
536721b1 KK |
1599 | /** |
1600 | * struct net_device - The DEVICE structure. | |
d651983d MCC |
1601 | * |
1602 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1603 | * data with strictly "high-level" data, and it has to know about | |
1604 | * almost every data structure used in the INET module. | |
536721b1 KK |
1605 | * |
1606 | * @name: This is the first field of the "visible" part of this structure | |
1607 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
d651983d | 1608 | * of the interface. |
536721b1 | 1609 | * |
ff927412 | 1610 | * @name_node: Name hashlist node |
536721b1 KK |
1611 | * @ifalias: SNMP alias |
1612 | * @mem_end: Shared memory end | |
1613 | * @mem_start: Shared memory start | |
1614 | * @base_addr: Device I/O address | |
1615 | * @irq: Device IRQ number | |
1616 | * | |
1617 | * @state: Generic network queuing layer state, see netdev_state_t | |
1618 | * @dev_list: The global list of network devices | |
5e82b4b2 BH |
1619 | * @napi_list: List entry used for polling NAPI devices |
1620 | * @unreg_list: List entry when we are unregistering the | |
1621 | * device; see the function unregister_netdev | |
1622 | * @close_list: List entry used when we are closing the device | |
62d885fe BP |
1623 | * @ptype_all: Device-specific packet handlers for all protocols |
1624 | * @ptype_specific: Device-specific, protocol-specific packet handlers | |
536721b1 KK |
1625 | * |
1626 | * @adj_list: Directly linked devices, like slaves for bonding | |
536721b1 KK |
1627 | * @features: Currently active device features |
1628 | * @hw_features: User-changeable features | |
1629 | * | |
1630 | * @wanted_features: User-requested features | |
1631 | * @vlan_features: Mask of features inheritable by VLAN devices | |
1632 | * | |
1633 | * @hw_enc_features: Mask of features inherited by encapsulating devices | |
1634 | * This field indicates what encapsulation | |
1635 | * offloads the hardware is capable of doing, | |
1636 | * and drivers will need to set them appropriately. | |
1637 | * | |
1638 | * @mpls_features: Mask of features inheritable by MPLS | |
a1fa83bd | 1639 | * @gso_partial_features: value(s) from NETIF_F_GSO\* |
536721b1 KK |
1640 | * |
1641 | * @ifindex: interface index | |
5e82b4b2 | 1642 | * @group: The group the device belongs to |
536721b1 KK |
1643 | * |
1644 | * @stats: Statistics struct, which was left as a legacy, use | |
1645 | * rtnl_link_stats64 instead | |
1646 | * | |
1647 | * @rx_dropped: Dropped packets by core network, | |
1648 | * do not use this in drivers | |
1649 | * @tx_dropped: Dropped packets by core network, | |
1650 | * do not use this in drivers | |
6e7333d3 JW |
1651 | * @rx_nohandler: nohandler dropped packets by core network on |
1652 | * inactive devices, do not use this in drivers | |
9e55e5d3 FF |
1653 | * @carrier_up_count: Number of times the carrier has been up |
1654 | * @carrier_down_count: Number of times the carrier has been down | |
536721b1 | 1655 | * |
536721b1 KK |
1656 | * @wireless_handlers: List of functions to handle Wireless Extensions, |
1657 | * instead of ioctl, | |
1658 | * see <net/iw_handler.h> for details. | |
1659 | * @wireless_data: Instance data managed by the core of wireless extensions | |
1660 | * | |
1661 | * @netdev_ops: Includes several pointers to callbacks, | |
1662 | * if one wants to override the ndo_*() functions | |
1663 | * @ethtool_ops: Management operations | |
a1fa83bd | 1664 | * @l3mdev_ops: Layer 3 master device operations |
f997c55c AA |
1665 | * @ndisc_ops: Includes callbacks for different IPv6 neighbour |
1666 | * discovery handling. Necessary for e.g. 6LoWPAN. | |
a1fa83bd RD |
1667 | * @xfrmdev_ops: Transformation offload operations |
1668 | * @tlsdev_ops: Transport Layer Security offload operations | |
d476059e | 1669 | * @header_ops: Includes callbacks for creating,parsing,caching,etc |
536721b1 KK |
1670 | * of Layer 2 headers. |
1671 | * | |
1672 | * @flags: Interface flags (a la BSD) | |
1673 | * @priv_flags: Like 'flags' but invisible to userspace, | |
1674 | * see if.h for the definitions | |
1675 | * @gflags: Global flags ( kept as legacy ) | |
1676 | * @padded: How much padding added by alloc_netdev() | |
1677 | * @operstate: RFC2863 operstate | |
1678 | * @link_mode: Mapping policy to operstate | |
1679 | * @if_port: Selectable AUI, TP, ... | |
1680 | * @dma: DMA channel | |
1681 | * @mtu: Interface MTU value | |
61e84623 JW |
1682 | * @min_mtu: Interface Minimum MTU value |
1683 | * @max_mtu: Interface Maximum MTU value | |
536721b1 | 1684 | * @type: Interface hardware type |
2793a23a | 1685 | * @hard_header_len: Maximum hardware header length. |
217e6fa2 | 1686 | * @min_header_len: Minimum hardware header length |
536721b1 KK |
1687 | * |
1688 | * @needed_headroom: Extra headroom the hardware may need, but not in all | |
1689 | * cases can this be guaranteed | |
1690 | * @needed_tailroom: Extra tailroom the hardware may need, but not in all | |
1691 | * cases can this be guaranteed. Some cases also use | |
1692 | * LL_MAX_HEADER instead to allocate the skb | |
1693 | * | |
1694 | * interface address info: | |
1695 | * | |
1696 | * @perm_addr: Permanent hw address | |
1697 | * @addr_assign_type: Hw address assignment type | |
1698 | * @addr_len: Hardware address length | |
5343da4c TY |
1699 | * @upper_level: Maximum depth level of upper devices. |
1700 | * @lower_level: Maximum depth level of lower devices. | |
8626a0c8 | 1701 | * @neigh_priv_len: Used in neigh_alloc() |
536721b1 KK |
1702 | * @dev_id: Used to differentiate devices that share |
1703 | * the same link layer address | |
1704 | * @dev_port: Used to differentiate devices that share | |
1705 | * the same function | |
1706 | * @addr_list_lock: XXX: need comments on this one | |
a1fa83bd | 1707 | * @name_assign_type: network interface name assignment type |
5e82b4b2 | 1708 | * @uc_promisc: Counter that indicates promiscuous mode |
536721b1 KK |
1709 | * has been enabled due to the need to listen to |
1710 | * additional unicast addresses in a device that | |
1711 | * does not implement ndo_set_rx_mode() | |
14ffbbb8 TG |
1712 | * @uc: unicast mac addresses |
1713 | * @mc: multicast mac addresses | |
1714 | * @dev_addrs: list of device hw addresses | |
1715 | * @queues_kset: Group of all Kobjects in the Tx and RX queues | |
5e82b4b2 BH |
1716 | * @promiscuity: Number of times the NIC is told to work in |
1717 | * promiscuous mode; if it becomes 0 the NIC will | |
1718 | * exit promiscuous mode | |
536721b1 KK |
1719 | * @allmulti: Counter, enables or disables allmulticast mode |
1720 | * | |
1721 | * @vlan_info: VLAN info | |
1722 | * @dsa_ptr: dsa specific data | |
1723 | * @tipc_ptr: TIPC specific data | |
1724 | * @atalk_ptr: AppleTalk link | |
1725 | * @ip_ptr: IPv4 specific data | |
1726 | * @dn_ptr: DECnet specific data | |
1727 | * @ip6_ptr: IPv6 specific data | |
1728 | * @ax25_ptr: AX.25 specific data | |
1729 | * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering | |
a1fa83bd RD |
1730 | * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network |
1731 | * device struct | |
1732 | * @mpls_ptr: mpls_dev struct pointer | |
536721b1 | 1733 | * |
536721b1 KK |
1734 | * @dev_addr: Hw address (before bcast, |
1735 | * because most packets are unicast) | |
1736 | * | |
1737 | * @_rx: Array of RX queues | |
1738 | * @num_rx_queues: Number of RX queues | |
1739 | * allocated at register_netdev() time | |
1740 | * @real_num_rx_queues: Number of RX queues currently active in device | |
a1fa83bd RD |
1741 | * @xdp_prog: XDP sockets filter program pointer |
1742 | * @gro_flush_timeout: timeout for GRO layer in NAPI | |
5c45a918 MCC |
1743 | * @napi_defer_hard_irqs: If not zero, provides a counter that would |
1744 | * allow to avoid NIC hard IRQ, on busy queues. | |
536721b1 KK |
1745 | * |
1746 | * @rx_handler: handler for received packets | |
1747 | * @rx_handler_data: XXX: need comments on this one | |
46209401 JP |
1748 | * @miniq_ingress: ingress/clsact qdisc specific data for |
1749 | * ingress processing | |
536721b1 | 1750 | * @ingress_queue: XXX: need comments on this one |
2f5e70c8 | 1751 | * @nf_hooks_ingress: netfilter hooks executed for ingress packets |
536721b1 KK |
1752 | * @broadcast: hw bcast address |
1753 | * | |
14ffbbb8 TG |
1754 | * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, |
1755 | * indexed by RX queue number. Assigned by driver. | |
1756 | * This must only be set if the ndo_rx_flow_steer | |
1757 | * operation is defined | |
1758 | * @index_hlist: Device index hash chain | |
1759 | * | |
536721b1 KK |
1760 | * @_tx: Array of TX queues |
1761 | * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time | |
1762 | * @real_num_tx_queues: Number of TX queues currently active in device | |
1763 | * @qdisc: Root qdisc from userspace point of view | |
1764 | * @tx_queue_len: Max frames per queue allowed | |
1765 | * @tx_global_lock: XXX: need comments on this one | |
a1fa83bd RD |
1766 | * @xdp_bulkq: XDP device bulk queue |
1767 | * @xps_cpus_map: all CPUs map for XPS device | |
1768 | * @xps_rxqs_map: all RXQs map for XPS device | |
536721b1 KK |
1769 | * |
1770 | * @xps_maps: XXX: need comments on this one | |
46209401 JP |
1771 | * @miniq_egress: clsact qdisc specific data for |
1772 | * egress processing | |
a1fa83bd | 1773 | * @qdisc_hash: qdisc hash table |
536721b1 | 1774 | * @watchdog_timeo: Represents the timeout that is used by |
5e82b4b2 | 1775 | * the watchdog (see dev_watchdog()) |
536721b1 KK |
1776 | * @watchdog_timer: List of timers |
1777 | * | |
1778 | * @pcpu_refcnt: Number of references to this device | |
1779 | * @todo_list: Delayed register/unregister | |
536721b1 KK |
1780 | * @link_watch_list: XXX: need comments on this one |
1781 | * | |
1782 | * @reg_state: Register/unregister state machine | |
1783 | * @dismantle: Device is going to be freed | |
1784 | * @rtnl_link_state: This enum represents the phases of creating | |
1785 | * a new link | |
1786 | * | |
cf124db5 DM |
1787 | * @needs_free_netdev: Should unregister perform free_netdev? |
1788 | * @priv_destructor: Called from unregister | |
536721b1 KK |
1789 | * @npinfo: XXX: need comments on this one |
1790 | * @nd_net: Network namespace this network device is inside | |
1791 | * | |
1792 | * @ml_priv: Mid-layer private | |
1793 | * @lstats: Loopback statistics | |
1794 | * @tstats: Tunnel statistics | |
1795 | * @dstats: Dummy statistics | |
1796 | * @vstats: Virtual ethernet statistics | |
1797 | * | |
1798 | * @garp_port: GARP | |
1799 | * @mrp_port: MRP | |
1800 | * | |
1801 | * @dev: Class/net/name entry | |
1802 | * @sysfs_groups: Space for optional device, statistics and wireless | |
1803 | * sysfs groups | |
1804 | * | |
1805 | * @sysfs_rx_queue_group: Space for optional per-rx queue attributes | |
1806 | * @rtnl_link_ops: Rtnl_link_ops | |
1807 | * | |
1808 | * @gso_max_size: Maximum size of generic segmentation offload | |
1809 | * @gso_max_segs: Maximum number of segments that can be passed to the | |
1810 | * NIC for GSO | |
1811 | * | |
1812 | * @dcbnl_ops: Data Center Bridging netlink ops | |
1813 | * @num_tc: Number of traffic classes in the net device | |
1814 | * @tc_to_txq: XXX: need comments on this one | |
920c1cd3 | 1815 | * @prio_tc_map: XXX: need comments on this one |
536721b1 KK |
1816 | * |
1817 | * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp | |
1818 | * | |
1819 | * @priomap: XXX: need comments on this one | |
1820 | * @phydev: Physical device may attach itself | |
1821 | * for hardware timestamping | |
e679c9c1 | 1822 | * @sfp_bus: attached &struct sfp_bus structure. |
1a33e10e | 1823 | * |
1a33e10e CW |
1824 | * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock |
1825 | * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount | |
536721b1 | 1826 | * |
d746d707 AK |
1827 | * @proto_down: protocol port state information can be sent to the |
1828 | * switch driver and used to set the phys state of the | |
1829 | * switch port. | |
1830 | * | |
61941143 HK |
1831 | * @wol_enabled: Wake-on-LAN is enabled |
1832 | * | |
93642e14 JP |
1833 | * @net_notifier_list: List of per-net netdev notifier block |
1834 | * that follow this device when it is moved | |
1835 | * to another network namespace. | |
1836 | * | |
30e9bb84 AT |
1837 | * @macsec_ops: MACsec offloading ops |
1838 | * | |
cc4e3835 JK |
1839 | * @udp_tunnel_nic_info: static structure describing the UDP tunnel |
1840 | * offload capabilities of the device | |
1841 | * @udp_tunnel_nic: UDP tunnel offload state | |
1842 | * | |
1da177e4 LT |
1843 | * FIXME: cleanup struct net_device such that network protocol info |
1844 | * moves out. | |
1845 | */ | |
1846 | ||
d94d9fee | 1847 | struct net_device { |
1da177e4 | 1848 | char name[IFNAMSIZ]; |
ff927412 | 1849 | struct netdev_name_node *name_node; |
6c557001 | 1850 | struct dev_ifalias __rcu *ifalias; |
1da177e4 LT |
1851 | /* |
1852 | * I/O specific fields | |
1853 | * FIXME: Merge these and struct ifmap into one | |
1854 | */ | |
536721b1 KK |
1855 | unsigned long mem_end; |
1856 | unsigned long mem_start; | |
1857 | unsigned long base_addr; | |
1858 | int irq; | |
1da177e4 LT |
1859 | |
1860 | /* | |
536721b1 KK |
1861 | * Some hardware also needs these fields (state,dev_list, |
1862 | * napi_list,unreg_list,close_list) but they are not | |
1da177e4 LT |
1863 | * part of the usual set specified in Space.c. |
1864 | */ | |
1865 | ||
1da177e4 LT |
1866 | unsigned long state; |
1867 | ||
7562f876 | 1868 | struct list_head dev_list; |
bea3348e | 1869 | struct list_head napi_list; |
44a0873d | 1870 | struct list_head unreg_list; |
5cde2829 | 1871 | struct list_head close_list; |
7866a621 SN |
1872 | struct list_head ptype_all; |
1873 | struct list_head ptype_specific; | |
2f268f12 | 1874 | |
2f268f12 VF |
1875 | struct { |
1876 | struct list_head upper; | |
1877 | struct list_head lower; | |
1878 | } adj_list; | |
1879 | ||
c8f44aff | 1880 | netdev_features_t features; |
c8f44aff | 1881 | netdev_features_t hw_features; |
c8f44aff | 1882 | netdev_features_t wanted_features; |
c8f44aff | 1883 | netdev_features_t vlan_features; |
6a674e9c | 1884 | netdev_features_t hw_enc_features; |
0d89d203 | 1885 | netdev_features_t mpls_features; |
802ab55a | 1886 | netdev_features_t gso_partial_features; |
04ed3e74 | 1887 | |
1da177e4 | 1888 | int ifindex; |
7a66bbc9 | 1889 | int group; |
1da177e4 | 1890 | |
c45d286e | 1891 | struct net_device_stats stats; |
015f0688 | 1892 | |
015f0688 ED |
1893 | atomic_long_t rx_dropped; |
1894 | atomic_long_t tx_dropped; | |
6e7333d3 | 1895 | atomic_long_t rx_nohandler; |
1da177e4 | 1896 | |
b2d3bcfa DD |
1897 | /* Stats to monitor link on/off, flapping */ |
1898 | atomic_t carrier_up_count; | |
1899 | atomic_t carrier_down_count; | |
1900 | ||
b86e0280 | 1901 | #ifdef CONFIG_WIRELESS_EXT |
5e82b4b2 BH |
1902 | const struct iw_handler_def *wireless_handlers; |
1903 | struct iw_public_data *wireless_data; | |
b86e0280 | 1904 | #endif |
d314774c | 1905 | const struct net_device_ops *netdev_ops; |
76fd8593 | 1906 | const struct ethtool_ops *ethtool_ops; |
1b69c6d0 DA |
1907 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1908 | const struct l3mdev_ops *l3mdev_ops; | |
1909 | #endif | |
f997c55c AA |
1910 | #if IS_ENABLED(CONFIG_IPV6) |
1911 | const struct ndisc_ops *ndisc_ops; | |
1912 | #endif | |
1da177e4 | 1913 | |
9cb0d21d | 1914 | #ifdef CONFIG_XFRM_OFFLOAD |
d77e38e6 SK |
1915 | const struct xfrmdev_ops *xfrmdev_ops; |
1916 | #endif | |
1917 | ||
a5c37c63 IL |
1918 | #if IS_ENABLED(CONFIG_TLS_DEVICE) |
1919 | const struct tlsdev_ops *tlsdev_ops; | |
1920 | #endif | |
1921 | ||
3b04ddde SH |
1922 | const struct header_ops *header_ops; |
1923 | ||
536721b1 KK |
1924 | unsigned int flags; |
1925 | unsigned int priv_flags; | |
1926 | ||
1da177e4 | 1927 | unsigned short gflags; |
536721b1 | 1928 | unsigned short padded; |
1da177e4 | 1929 | |
536721b1 KK |
1930 | unsigned char operstate; |
1931 | unsigned char link_mode; | |
b00055aa | 1932 | |
536721b1 KK |
1933 | unsigned char if_port; |
1934 | unsigned char dma; | |
bdc220da | 1935 | |
501a90c9 ED |
1936 | /* Note : dev->mtu is often read without holding a lock. |
1937 | * Writers usually hold RTNL. | |
1938 | * It is recommended to use READ_ONCE() to annotate the reads, | |
1939 | * and to use WRITE_ONCE() to annotate the writes. | |
1940 | */ | |
536721b1 | 1941 | unsigned int mtu; |
61e84623 JW |
1942 | unsigned int min_mtu; |
1943 | unsigned int max_mtu; | |
536721b1 KK |
1944 | unsigned short type; |
1945 | unsigned short hard_header_len; | |
d92be7a4 | 1946 | unsigned char min_header_len; |
1da177e4 | 1947 | |
f5184d26 JB |
1948 | unsigned short needed_headroom; |
1949 | unsigned short needed_tailroom; | |
1950 | ||
1da177e4 | 1951 | /* Interface address info. */ |
536721b1 KK |
1952 | unsigned char perm_addr[MAX_ADDR_LEN]; |
1953 | unsigned char addr_assign_type; | |
1954 | unsigned char addr_len; | |
5343da4c TY |
1955 | unsigned char upper_level; |
1956 | unsigned char lower_level; | |
a0a9663d | 1957 | unsigned short neigh_priv_len; |
536721b1 KK |
1958 | unsigned short dev_id; |
1959 | unsigned short dev_port; | |
ccffad25 | 1960 | spinlock_t addr_list_lock; |
14ffbbb8 TG |
1961 | unsigned char name_assign_type; |
1962 | bool uc_promisc; | |
536721b1 KK |
1963 | struct netdev_hw_addr_list uc; |
1964 | struct netdev_hw_addr_list mc; | |
1965 | struct netdev_hw_addr_list dev_addrs; | |
1966 | ||
4c3d5e7b ED |
1967 | #ifdef CONFIG_SYSFS |
1968 | struct kset *queues_kset; | |
1969 | #endif | |
9d45abe1 WC |
1970 | unsigned int promiscuity; |
1971 | unsigned int allmulti; | |
1da177e4 | 1972 | |
1da177e4 | 1973 | |
5e82b4b2 | 1974 | /* Protocol-specific pointers */ |
65ac6a5f | 1975 | |
d11ead75 | 1976 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
536721b1 | 1977 | struct vlan_info __rcu *vlan_info; |
65ac6a5f | 1978 | #endif |
34a430d7 | 1979 | #if IS_ENABLED(CONFIG_NET_DSA) |
2f657a60 | 1980 | struct dsa_port *dsa_ptr; |
37cb0620 YX |
1981 | #endif |
1982 | #if IS_ENABLED(CONFIG_TIPC) | |
536721b1 | 1983 | struct tipc_bearer __rcu *tipc_ptr; |
91da11f8 | 1984 | #endif |
89e58148 | 1985 | #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK) |
536721b1 | 1986 | void *atalk_ptr; |
89e58148 | 1987 | #endif |
536721b1 | 1988 | struct in_device __rcu *ip_ptr; |
330c7272 | 1989 | #if IS_ENABLED(CONFIG_DECNET) |
536721b1 | 1990 | struct dn_dev __rcu *dn_ptr; |
330c7272 | 1991 | #endif |
536721b1 | 1992 | struct inet6_dev __rcu *ip6_ptr; |
19ff13f2 | 1993 | #if IS_ENABLED(CONFIG_AX25) |
536721b1 | 1994 | void *ax25_ptr; |
19ff13f2 | 1995 | #endif |
536721b1 | 1996 | struct wireless_dev *ieee80211_ptr; |
98a18b6f | 1997 | struct wpan_dev *ieee802154_ptr; |
03c57747 RS |
1998 | #if IS_ENABLED(CONFIG_MPLS_ROUTING) |
1999 | struct mpls_dev __rcu *mpls_ptr; | |
2000 | #endif | |
1da177e4 | 2001 | |
9356b8fc | 2002 | /* |
cd13539b | 2003 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 2004 | */ |
9356b8fc | 2005 | /* Interface address info used in eth_type_trans() */ |
536721b1 | 2006 | unsigned char *dev_addr; |
f001fde5 | 2007 | |
0a9627f2 | 2008 | struct netdev_rx_queue *_rx; |
0a9627f2 | 2009 | unsigned int num_rx_queues; |
62fe0b40 | 2010 | unsigned int real_num_rx_queues; |
0a9627f2 | 2011 | |
7acedaf5 | 2012 | struct bpf_prog __rcu *xdp_prog; |
3b47d303 | 2013 | unsigned long gro_flush_timeout; |
6f8b12d6 | 2014 | int napi_defer_hard_irqs; |
61391cde | 2015 | rx_handler_func_t __rcu *rx_handler; |
2016 | void __rcu *rx_handler_data; | |
e8a0464c | 2017 | |
4cda01e8 | 2018 | #ifdef CONFIG_NET_CLS_ACT |
46209401 | 2019 | struct mini_Qdisc __rcu *miniq_ingress; |
d2788d34 | 2020 | #endif |
24824a09 | 2021 | struct netdev_queue __rcu *ingress_queue; |
e687ad60 | 2022 | #ifdef CONFIG_NETFILTER_INGRESS |
960632ec | 2023 | struct nf_hook_entries __rcu *nf_hooks_ingress; |
e687ad60 | 2024 | #endif |
d2788d34 | 2025 | |
536721b1 | 2026 | unsigned char broadcast[MAX_ADDR_LEN]; |
14ffbbb8 TG |
2027 | #ifdef CONFIG_RFS_ACCEL |
2028 | struct cpu_rmap *rx_cpu_rmap; | |
2029 | #endif | |
2030 | struct hlist_node index_hlist; | |
cd13539b ED |
2031 | |
2032 | /* | |
2033 | * Cache lines mostly used on transmit path | |
2034 | */ | |
e8a0464c DM |
2035 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
2036 | unsigned int num_tx_queues; | |
fd2ea0a7 | 2037 | unsigned int real_num_tx_queues; |
af356afa | 2038 | struct Qdisc *qdisc; |
0cd29503 | 2039 | unsigned int tx_queue_len; |
c3f26a26 | 2040 | spinlock_t tx_global_lock; |
75ccae62 THJ |
2041 | |
2042 | struct xdp_dev_bulk_queue __percpu *xdp_bulkq; | |
cd13539b | 2043 | |
bf264145 | 2044 | #ifdef CONFIG_XPS |
80d19669 AN |
2045 | struct xps_dev_maps __rcu *xps_cpus_map; |
2046 | struct xps_dev_maps __rcu *xps_rxqs_map; | |
bf264145 | 2047 | #endif |
1f211a1b | 2048 | #ifdef CONFIG_NET_CLS_ACT |
46209401 | 2049 | struct mini_Qdisc __rcu *miniq_egress; |
1f211a1b | 2050 | #endif |
0c4f691f | 2051 | |
75ccae62 THJ |
2052 | #ifdef CONFIG_NET_SCHED |
2053 | DECLARE_HASHTABLE (qdisc_hash, 4); | |
2054 | #endif | |
9356b8fc | 2055 | /* These may be needed for future network-power-down code. */ |
9356b8fc | 2056 | struct timer_list watchdog_timer; |
75ccae62 | 2057 | int watchdog_timeo; |
9356b8fc | 2058 | |
829eb208 RP |
2059 | u32 proto_down_reason; |
2060 | ||
1da177e4 | 2061 | struct list_head todo_list; |
75ccae62 | 2062 | int __percpu *pcpu_refcnt; |
1da177e4 | 2063 | |
e014debe | 2064 | struct list_head link_watch_list; |
572a103d | 2065 | |
1da177e4 | 2066 | enum { NETREG_UNINITIALIZED=0, |
b17a7c17 | 2067 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
2068 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
2069 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
2070 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 2071 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
2072 | } reg_state:8; |
2073 | ||
536721b1 | 2074 | bool dismantle; |
a2835763 PM |
2075 | |
2076 | enum { | |
2077 | RTNL_LINK_INITIALIZED, | |
2078 | RTNL_LINK_INITIALIZING, | |
2079 | } rtnl_link_state:16; | |
1da177e4 | 2080 | |
cf124db5 DM |
2081 | bool needs_free_netdev; |
2082 | void (*priv_destructor)(struct net_device *dev); | |
1da177e4 | 2083 | |
1da177e4 | 2084 | #ifdef CONFIG_NETPOLL |
5fbee843 | 2085 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 2086 | #endif |
eae792b7 | 2087 | |
0c5c9fb5 | 2088 | possible_net_t nd_net; |
4a1c5371 | 2089 | |
4951704b | 2090 | /* mid-layer private */ |
a7855c78 | 2091 | union { |
536721b1 KK |
2092 | void *ml_priv; |
2093 | struct pcpu_lstats __percpu *lstats; | |
8f84985f | 2094 | struct pcpu_sw_netstats __percpu *tstats; |
536721b1 | 2095 | struct pcpu_dstats __percpu *dstats; |
a7855c78 | 2096 | }; |
536721b1 | 2097 | |
fb585b44 | 2098 | #if IS_ENABLED(CONFIG_GARP) |
3cc77ec7 | 2099 | struct garp_port __rcu *garp_port; |
fb585b44 TK |
2100 | #endif |
2101 | #if IS_ENABLED(CONFIG_MRP) | |
febf018d | 2102 | struct mrp_port __rcu *mrp_port; |
fb585b44 | 2103 | #endif |
1da177e4 | 2104 | |
5e82b4b2 | 2105 | struct device dev; |
0c509a6c | 2106 | const struct attribute_group *sysfs_groups[4]; |
a953be53 | 2107 | const struct attribute_group *sysfs_rx_queue_group; |
38f7b870 | 2108 | |
38f7b870 | 2109 | const struct rtnl_link_ops *rtnl_link_ops; |
f25f4e44 | 2110 | |
82cc1a7a PWJ |
2111 | /* for setting kernel sock attribute on TCP connection setup */ |
2112 | #define GSO_MAX_SIZE 65536 | |
2113 | unsigned int gso_max_size; | |
30b678d8 BH |
2114 | #define GSO_MAX_SEGS 65535 |
2115 | u16 gso_max_segs; | |
743b03a8 | 2116 | |
7a6b6f51 | 2117 | #ifdef CONFIG_DCB |
32953543 | 2118 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 2119 | #endif |
ffcfe25b | 2120 | s16 num_tc; |
5e82b4b2 BH |
2121 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; |
2122 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 2123 | |
d11ead75 | 2124 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 | 2125 | unsigned int fcoe_ddp_xid; |
5bc1421e | 2126 | #endif |
86f8515f | 2127 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 2128 | struct netprio_map __rcu *priomap; |
4d288d57 | 2129 | #endif |
5e82b4b2 | 2130 | struct phy_device *phydev; |
e679c9c1 | 2131 | struct sfp_bus *sfp_bus; |
1a33e10e CW |
2132 | struct lock_class_key *qdisc_tx_busylock; |
2133 | struct lock_class_key *qdisc_running_key; | |
5e82b4b2 | 2134 | bool proto_down; |
61941143 | 2135 | unsigned wol_enabled:1; |
93642e14 JP |
2136 | |
2137 | struct list_head net_notifier_list; | |
30e9bb84 AT |
2138 | |
2139 | #if IS_ENABLED(CONFIG_MACSEC) | |
2140 | /* MACsec management functions */ | |
2141 | const struct macsec_ops *macsec_ops; | |
2142 | #endif | |
cc4e3835 JK |
2143 | const struct udp_tunnel_nic_info *udp_tunnel_nic_info; |
2144 | struct udp_tunnel_nic *udp_tunnel_nic; | |
7f0a8382 AN |
2145 | |
2146 | /* protected by rtnl_lock */ | |
2147 | struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE]; | |
1da177e4 | 2148 | }; |
43cb76d9 | 2149 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 | 2150 | |
b5cdae32 DM |
2151 | static inline bool netif_elide_gro(const struct net_device *dev) |
2152 | { | |
2153 | if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog) | |
2154 | return true; | |
2155 | return false; | |
2156 | } | |
2157 | ||
1da177e4 | 2158 | #define NETDEV_ALIGN 32 |
1da177e4 | 2159 | |
4f57c087 JF |
2160 | static inline |
2161 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
2162 | { | |
2163 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
2164 | } | |
2165 | ||
2166 | static inline | |
2167 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
2168 | { | |
2169 | if (tc >= dev->num_tc) | |
2170 | return -EINVAL; | |
2171 | ||
2172 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
2173 | return 0; | |
2174 | } | |
2175 | ||
8d059b0f | 2176 | int netdev_txq_to_tc(struct net_device *dev, unsigned int txq); |
9cf1f6a8 AD |
2177 | void netdev_reset_tc(struct net_device *dev); |
2178 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset); | |
2179 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc); | |
4f57c087 JF |
2180 | |
2181 | static inline | |
2182 | int netdev_get_num_tc(struct net_device *dev) | |
2183 | { | |
2184 | return dev->num_tc; | |
2185 | } | |
2186 | ||
f468f21b TT |
2187 | static inline void net_prefetch(void *p) |
2188 | { | |
2189 | prefetch(p); | |
2190 | #if L1_CACHE_BYTES < 128 | |
2191 | prefetch((u8 *)p + L1_CACHE_BYTES); | |
2192 | #endif | |
2193 | } | |
2194 | ||
2195 | static inline void net_prefetchw(void *p) | |
2196 | { | |
2197 | prefetchw(p); | |
2198 | #if L1_CACHE_BYTES < 128 | |
2199 | prefetchw((u8 *)p + L1_CACHE_BYTES); | |
2200 | #endif | |
2201 | } | |
2202 | ||
ffcfe25b AD |
2203 | void netdev_unbind_sb_channel(struct net_device *dev, |
2204 | struct net_device *sb_dev); | |
2205 | int netdev_bind_sb_channel_queue(struct net_device *dev, | |
2206 | struct net_device *sb_dev, | |
2207 | u8 tc, u16 count, u16 offset); | |
2208 | int netdev_set_sb_channel(struct net_device *dev, u16 channel); | |
2209 | static inline int netdev_get_sb_channel(struct net_device *dev) | |
2210 | { | |
2211 | return max_t(int, -dev->num_tc, 0); | |
2212 | } | |
2213 | ||
e8a0464c DM |
2214 | static inline |
2215 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
2216 | unsigned int index) | |
2217 | { | |
2218 | return &dev->_tx[index]; | |
2219 | } | |
2220 | ||
10c51b56 DB |
2221 | static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
2222 | const struct sk_buff *skb) | |
2223 | { | |
2224 | return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); | |
2225 | } | |
2226 | ||
e8a0464c DM |
2227 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
2228 | void (*f)(struct net_device *, | |
2229 | struct netdev_queue *, | |
2230 | void *), | |
2231 | void *arg) | |
2232 | { | |
2233 | unsigned int i; | |
2234 | ||
2235 | for (i = 0; i < dev->num_tx_queues; i++) | |
2236 | f(dev, &dev->_tx[i], arg); | |
2237 | } | |
2238 | ||
1a33e10e CW |
2239 | #define netdev_lockdep_set_classes(dev) \ |
2240 | { \ | |
2241 | static struct lock_class_key qdisc_tx_busylock_key; \ | |
2242 | static struct lock_class_key qdisc_running_key; \ | |
2243 | static struct lock_class_key qdisc_xmit_lock_key; \ | |
845e0ebb | 2244 | static struct lock_class_key dev_addr_list_lock_key; \ |
1a33e10e CW |
2245 | unsigned int i; \ |
2246 | \ | |
2247 | (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \ | |
2248 | (dev)->qdisc_running_key = &qdisc_running_key; \ | |
845e0ebb CW |
2249 | lockdep_set_class(&(dev)->addr_list_lock, \ |
2250 | &dev_addr_list_lock_key); \ | |
1a33e10e CW |
2251 | for (i = 0; i < (dev)->num_tx_queues; i++) \ |
2252 | lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \ | |
2253 | &qdisc_xmit_lock_key); \ | |
2254 | } | |
2255 | ||
b71b5837 PA |
2256 | u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb, |
2257 | struct net_device *sb_dev); | |
4bd97d51 PA |
2258 | struct netdev_queue *netdev_core_pick_tx(struct net_device *dev, |
2259 | struct sk_buff *skb, | |
2260 | struct net_device *sb_dev); | |
8c4c49df | 2261 | |
871b642a PA |
2262 | /* returns the headroom that the master device needs to take in account |
2263 | * when forwarding to this dev | |
2264 | */ | |
2265 | static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) | |
2266 | { | |
2267 | return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; | |
2268 | } | |
2269 | ||
2270 | static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) | |
2271 | { | |
2272 | if (dev->netdev_ops->ndo_set_rx_headroom) | |
2273 | dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); | |
2274 | } | |
2275 | ||
2276 | /* set the device rx headroom to the dev's default */ | |
2277 | static inline void netdev_reset_rx_headroom(struct net_device *dev) | |
2278 | { | |
2279 | netdev_set_rx_headroom(dev, -1); | |
2280 | } | |
2281 | ||
c346dca1 YH |
2282 | /* |
2283 | * Net namespace inlines | |
2284 | */ | |
2285 | static inline | |
2286 | struct net *dev_net(const struct net_device *dev) | |
2287 | { | |
c2d9ba9b | 2288 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
2289 | } |
2290 | ||
2291 | static inline | |
f5aa23fd | 2292 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 | 2293 | { |
0c5c9fb5 | 2294 | write_pnet(&dev->nd_net, net); |
c346dca1 YH |
2295 | } |
2296 | ||
bea3348e SH |
2297 | /** |
2298 | * netdev_priv - access network device private data | |
2299 | * @dev: network device | |
2300 | * | |
2301 | * Get network device private data | |
2302 | */ | |
6472ce60 | 2303 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 2304 | { |
1ce8e7b5 | 2305 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
2306 | } |
2307 | ||
1da177e4 LT |
2308 | /* Set the sysfs physical device reference for the network logical device |
2309 | * if set prior to registration will cause a symlink during initialization. | |
2310 | */ | |
43cb76d9 | 2311 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 2312 | |
384912ed | 2313 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 2314 | * fine-grained identification of different network device types. For |
5e82b4b2 | 2315 | * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. |
384912ed MH |
2316 | */ |
2317 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
2318 | ||
82dc3c63 ED |
2319 | /* Default NAPI poll() weight |
2320 | * Device drivers are strongly advised to not use bigger value | |
2321 | */ | |
2322 | #define NAPI_POLL_WEIGHT 64 | |
2323 | ||
3b582cc1 | 2324 | /** |
5e82b4b2 | 2325 | * netif_napi_add - initialize a NAPI context |
3b582cc1 | 2326 | * @dev: network device |
5e82b4b2 | 2327 | * @napi: NAPI context |
3b582cc1 SH |
2328 | * @poll: polling function |
2329 | * @weight: default weight | |
2330 | * | |
5e82b4b2 BH |
2331 | * netif_napi_add() must be used to initialize a NAPI context prior to calling |
2332 | * *any* of the other NAPI-related functions. | |
3b582cc1 | 2333 | */ |
d565b0a1 HX |
2334 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
2335 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 2336 | |
d64b5e85 | 2337 | /** |
5e82b4b2 | 2338 | * netif_tx_napi_add - initialize a NAPI context |
d64b5e85 | 2339 | * @dev: network device |
5e82b4b2 | 2340 | * @napi: NAPI context |
d64b5e85 ED |
2341 | * @poll: polling function |
2342 | * @weight: default weight | |
2343 | * | |
2344 | * This variant of netif_napi_add() should be used from drivers using NAPI | |
2345 | * to exclusively poll a TX queue. | |
2346 | * This will avoid we add it into napi_hash[], thus polluting this hash table. | |
2347 | */ | |
2348 | static inline void netif_tx_napi_add(struct net_device *dev, | |
2349 | struct napi_struct *napi, | |
2350 | int (*poll)(struct napi_struct *, int), | |
2351 | int weight) | |
2352 | { | |
2353 | set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); | |
2354 | netif_napi_add(dev, napi, poll, weight); | |
2355 | } | |
2356 | ||
5198d545 JK |
2357 | /** |
2358 | * __netif_napi_del - remove a NAPI context | |
2359 | * @napi: NAPI context | |
2360 | * | |
2361 | * Warning: caller must observe RCU grace period before freeing memory | |
2362 | * containing @napi. Drivers might want to call this helper to combine | |
2363 | * all the needed RCU grace periods into a single one. | |
2364 | */ | |
2365 | void __netif_napi_del(struct napi_struct *napi); | |
2366 | ||
d8156534 | 2367 | /** |
5e82b4b2 BH |
2368 | * netif_napi_del - remove a NAPI context |
2369 | * @napi: NAPI context | |
d8156534 | 2370 | * |
5e82b4b2 | 2371 | * netif_napi_del() removes a NAPI context from the network device NAPI list |
d8156534 | 2372 | */ |
5198d545 JK |
2373 | static inline void netif_napi_del(struct napi_struct *napi) |
2374 | { | |
2375 | __netif_napi_del(napi); | |
2376 | synchronize_net(); | |
2377 | } | |
d565b0a1 HX |
2378 | |
2379 | struct napi_gro_cb { | |
78a478d0 | 2380 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
5e82b4b2 | 2381 | void *frag0; |
78a478d0 | 2382 | |
7489594c HX |
2383 | /* Length of frag0. */ |
2384 | unsigned int frag0_len; | |
2385 | ||
86911732 | 2386 | /* This indicates where we are processing relative to skb->data. */ |
5e82b4b2 | 2387 | int data_offset; |
86911732 | 2388 | |
d565b0a1 | 2389 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
2390 | u16 flush; |
2391 | ||
2392 | /* Save the IP ID here and check when we get to the transport layer */ | |
2393 | u16 flush_id; | |
d565b0a1 HX |
2394 | |
2395 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
2396 | u16 count; |
2397 | ||
15e2396d TH |
2398 | /* Start offset for remote checksum offload */ |
2399 | u16 gro_remcsum_start; | |
2400 | ||
2e71a6f8 ED |
2401 | /* jiffies when first packet was created/queued */ |
2402 | unsigned long age; | |
86347245 | 2403 | |
afe93325 | 2404 | /* Used in ipv6_gro_receive() and foo-over-udp */ |
b582ef09 OG |
2405 | u16 proto; |
2406 | ||
baa32ff4 TH |
2407 | /* This is non-zero if the packet may be of the same flow. */ |
2408 | u8 same_flow:1; | |
2409 | ||
fac8e0f5 JG |
2410 | /* Used in tunnel GRO receive */ |
2411 | u8 encap_mark:1; | |
573e8fca TH |
2412 | |
2413 | /* GRO checksum is valid */ | |
2414 | u8 csum_valid:1; | |
2415 | ||
662880f4 TH |
2416 | /* Number of checksums via CHECKSUM_UNNECESSARY */ |
2417 | u8 csum_cnt:3; | |
c3c7c254 | 2418 | |
baa32ff4 TH |
2419 | /* Free the skb? */ |
2420 | u8 free:2; | |
2421 | #define NAPI_GRO_FREE 1 | |
2422 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2423 | ||
efc98d08 TH |
2424 | /* Used in foo-over-udp, set in udp[46]_gro_receive */ |
2425 | u8 is_ipv6:1; | |
2426 | ||
a0ca153f AD |
2427 | /* Used in GRE, set in fou/gue_gro_receive */ |
2428 | u8 is_fou:1; | |
2429 | ||
1530545e AD |
2430 | /* Used to determine if flush_id can be ignored */ |
2431 | u8 is_atomic:1; | |
2432 | ||
fcd91dd4 SD |
2433 | /* Number of gro_receive callbacks this packet already went through */ |
2434 | u8 recursion_counter:4; | |
2435 | ||
3a1296a3 SK |
2436 | /* GRO is done by frag_list pointer chaining. */ |
2437 | u8 is_flist:1; | |
baa32ff4 | 2438 | |
bf5a755f JC |
2439 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
2440 | __wsum csum; | |
2441 | ||
c3c7c254 ED |
2442 | /* used in skb_gro_receive() slow path */ |
2443 | struct sk_buff *last; | |
d565b0a1 HX |
2444 | }; |
2445 | ||
2446 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 2447 | |
fcd91dd4 SD |
2448 | #define GRO_RECURSION_LIMIT 15 |
2449 | static inline int gro_recursion_inc_test(struct sk_buff *skb) | |
2450 | { | |
2451 | return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT; | |
2452 | } | |
2453 | ||
d4546c25 DM |
2454 | typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *); |
2455 | static inline struct sk_buff *call_gro_receive(gro_receive_t cb, | |
2456 | struct list_head *head, | |
2457 | struct sk_buff *skb) | |
fcd91dd4 SD |
2458 | { |
2459 | if (unlikely(gro_recursion_inc_test(skb))) { | |
2460 | NAPI_GRO_CB(skb)->flush |= 1; | |
2461 | return NULL; | |
2462 | } | |
2463 | ||
2464 | return cb(head, skb); | |
2465 | } | |
2466 | ||
d4546c25 DM |
2467 | typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *, |
2468 | struct sk_buff *); | |
2469 | static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb, | |
2470 | struct sock *sk, | |
2471 | struct list_head *head, | |
2472 | struct sk_buff *skb) | |
fcd91dd4 SD |
2473 | { |
2474 | if (unlikely(gro_recursion_inc_test(skb))) { | |
2475 | NAPI_GRO_CB(skb)->flush |= 1; | |
2476 | return NULL; | |
2477 | } | |
2478 | ||
2479 | return cb(sk, head, skb); | |
2480 | } | |
2481 | ||
1da177e4 | 2482 | struct packet_type { |
f2ccd8fa | 2483 | __be16 type; /* This is really htons(ether_type). */ |
fa788d98 | 2484 | bool ignore_outgoing; |
f2ccd8fa DM |
2485 | struct net_device *dev; /* NULL is wildcarded here */ |
2486 | int (*func) (struct sk_buff *, | |
2487 | struct net_device *, | |
2488 | struct packet_type *, | |
2489 | struct net_device *); | |
17266ee9 EC |
2490 | void (*list_func) (struct list_head *, |
2491 | struct packet_type *, | |
2492 | struct net_device *); | |
c0de08d0 EL |
2493 | bool (*id_match)(struct packet_type *ptype, |
2494 | struct sock *sk); | |
1da177e4 LT |
2495 | void *af_packet_priv; |
2496 | struct list_head list; | |
2497 | }; | |
2498 | ||
f191a1d1 | 2499 | struct offload_callbacks { |
576a30eb | 2500 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 2501 | netdev_features_t features); |
d4546c25 DM |
2502 | struct sk_buff *(*gro_receive)(struct list_head *head, |
2503 | struct sk_buff *skb); | |
299603e8 | 2504 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
2505 | }; |
2506 | ||
2507 | struct packet_offload { | |
2508 | __be16 type; /* This is really htons(ether_type). */ | |
bdef7de4 | 2509 | u16 priority; |
f191a1d1 VY |
2510 | struct offload_callbacks callbacks; |
2511 | struct list_head list; | |
1da177e4 LT |
2512 | }; |
2513 | ||
5e82b4b2 | 2514 | /* often modified stats are per-CPU, other are shared (netdev->stats) */ |
8f84985f LR |
2515 | struct pcpu_sw_netstats { |
2516 | u64 rx_packets; | |
2517 | u64 rx_bytes; | |
2518 | u64 tx_packets; | |
2519 | u64 tx_bytes; | |
2520 | struct u64_stats_sync syncp; | |
9a5ee462 | 2521 | } __aligned(4 * sizeof(u64)); |
52bb6677 LR |
2522 | |
2523 | struct pcpu_lstats { | |
fd2f4737 ED |
2524 | u64_stats_t packets; |
2525 | u64_stats_t bytes; | |
52bb6677 | 2526 | struct u64_stats_sync syncp; |
9a5ee462 | 2527 | } __aligned(2 * sizeof(u64)); |
8f84985f | 2528 | |
de7d5084 ED |
2529 | void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes); |
2530 | ||
dd5382a0 ED |
2531 | static inline void dev_lstats_add(struct net_device *dev, unsigned int len) |
2532 | { | |
2533 | struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats); | |
2534 | ||
2535 | u64_stats_update_begin(&lstats->syncp); | |
fd2f4737 ED |
2536 | u64_stats_add(&lstats->bytes, len); |
2537 | u64_stats_inc(&lstats->packets); | |
dd5382a0 ED |
2538 | u64_stats_update_end(&lstats->syncp); |
2539 | } | |
2540 | ||
aabc92bb PNA |
2541 | #define __netdev_alloc_pcpu_stats(type, gfp) \ |
2542 | ({ \ | |
2543 | typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ | |
2544 | if (pcpu_stats) { \ | |
2545 | int __cpu; \ | |
2546 | for_each_possible_cpu(__cpu) { \ | |
2547 | typeof(type) *stat; \ | |
2548 | stat = per_cpu_ptr(pcpu_stats, __cpu); \ | |
2549 | u64_stats_init(&stat->syncp); \ | |
2550 | } \ | |
2551 | } \ | |
2552 | pcpu_stats; \ | |
1c213bd2 WC |
2553 | }) |
2554 | ||
aabc92bb | 2555 | #define netdev_alloc_pcpu_stats(type) \ |
326fcfa5 | 2556 | __netdev_alloc_pcpu_stats(type, GFP_KERNEL) |
aabc92bb | 2557 | |
764f5e54 JP |
2558 | enum netdev_lag_tx_type { |
2559 | NETDEV_LAG_TX_TYPE_UNKNOWN, | |
2560 | NETDEV_LAG_TX_TYPE_RANDOM, | |
2561 | NETDEV_LAG_TX_TYPE_BROADCAST, | |
2562 | NETDEV_LAG_TX_TYPE_ROUNDROBIN, | |
2563 | NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, | |
2564 | NETDEV_LAG_TX_TYPE_HASH, | |
2565 | }; | |
2566 | ||
f44aa9ef JH |
2567 | enum netdev_lag_hash { |
2568 | NETDEV_LAG_HASH_NONE, | |
2569 | NETDEV_LAG_HASH_L2, | |
2570 | NETDEV_LAG_HASH_L34, | |
2571 | NETDEV_LAG_HASH_L23, | |
2572 | NETDEV_LAG_HASH_E23, | |
2573 | NETDEV_LAG_HASH_E34, | |
2574 | NETDEV_LAG_HASH_UNKNOWN, | |
2575 | }; | |
2576 | ||
764f5e54 JP |
2577 | struct netdev_lag_upper_info { |
2578 | enum netdev_lag_tx_type tx_type; | |
f44aa9ef | 2579 | enum netdev_lag_hash hash_type; |
764f5e54 JP |
2580 | }; |
2581 | ||
fb1b2e3c JP |
2582 | struct netdev_lag_lower_state_info { |
2583 | u8 link_up : 1, | |
2584 | tx_enabled : 1; | |
2585 | }; | |
2586 | ||
1da177e4 LT |
2587 | #include <linux/notifier.h> |
2588 | ||
ede2762d KT |
2589 | /* netdevice notifier chain. Please remember to update netdev_cmd_to_name() |
2590 | * and the rtnetlink notification exclusion list in rtnetlink_event() when | |
2591 | * adding new types. | |
dcfe1421 | 2592 | */ |
ede2762d KT |
2593 | enum netdev_cmd { |
2594 | NETDEV_UP = 1, /* For now you can't veto a device up/down */ | |
2595 | NETDEV_DOWN, | |
2596 | NETDEV_REBOOT, /* Tell a protocol stack a network interface | |
dcfe1421 AW |
2597 | detected a hardware crash and restarted |
2598 | - we can use this eg to kick tcp sessions | |
2599 | once done */ | |
ede2762d KT |
2600 | NETDEV_CHANGE, /* Notify device state change */ |
2601 | NETDEV_REGISTER, | |
2602 | NETDEV_UNREGISTER, | |
2603 | NETDEV_CHANGEMTU, /* notify after mtu change happened */ | |
1570415f PM |
2604 | NETDEV_CHANGEADDR, /* notify after the address change */ |
2605 | NETDEV_PRE_CHANGEADDR, /* notify before the address change */ | |
ede2762d KT |
2606 | NETDEV_GOING_DOWN, |
2607 | NETDEV_CHANGENAME, | |
2608 | NETDEV_FEAT_CHANGE, | |
2609 | NETDEV_BONDING_FAILOVER, | |
2610 | NETDEV_PRE_UP, | |
2611 | NETDEV_PRE_TYPE_CHANGE, | |
2612 | NETDEV_POST_TYPE_CHANGE, | |
2613 | NETDEV_POST_INIT, | |
ede2762d KT |
2614 | NETDEV_RELEASE, |
2615 | NETDEV_NOTIFY_PEERS, | |
2616 | NETDEV_JOIN, | |
2617 | NETDEV_CHANGEUPPER, | |
2618 | NETDEV_RESEND_IGMP, | |
2619 | NETDEV_PRECHANGEMTU, /* notify before mtu change happened */ | |
2620 | NETDEV_CHANGEINFODATA, | |
2621 | NETDEV_BONDING_INFO, | |
2622 | NETDEV_PRECHANGEUPPER, | |
2623 | NETDEV_CHANGELOWERSTATE, | |
2624 | NETDEV_UDP_TUNNEL_PUSH_INFO, | |
2625 | NETDEV_UDP_TUNNEL_DROP_INFO, | |
2626 | NETDEV_CHANGE_TX_QUEUE_LEN, | |
9daae9bd GP |
2627 | NETDEV_CVLAN_FILTER_PUSH_INFO, |
2628 | NETDEV_CVLAN_FILTER_DROP_INFO, | |
2629 | NETDEV_SVLAN_FILTER_PUSH_INFO, | |
2630 | NETDEV_SVLAN_FILTER_DROP_INFO, | |
ede2762d KT |
2631 | }; |
2632 | const char *netdev_cmd_to_name(enum netdev_cmd cmd); | |
dcfe1421 | 2633 | |
f629d208 JP |
2634 | int register_netdevice_notifier(struct notifier_block *nb); |
2635 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
a30c7b42 JP |
2636 | int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb); |
2637 | int unregister_netdevice_notifier_net(struct net *net, | |
2638 | struct notifier_block *nb); | |
93642e14 JP |
2639 | int register_netdevice_notifier_dev_net(struct net_device *dev, |
2640 | struct notifier_block *nb, | |
2641 | struct netdev_net_notifier *nn); | |
2642 | int unregister_netdevice_notifier_dev_net(struct net_device *dev, | |
2643 | struct notifier_block *nb, | |
2644 | struct netdev_net_notifier *nn); | |
351638e7 JP |
2645 | |
2646 | struct netdev_notifier_info { | |
51d0c047 DA |
2647 | struct net_device *dev; |
2648 | struct netlink_ext_ack *extack; | |
351638e7 JP |
2649 | }; |
2650 | ||
af7d6cce SD |
2651 | struct netdev_notifier_info_ext { |
2652 | struct netdev_notifier_info info; /* must be first */ | |
2653 | union { | |
2654 | u32 mtu; | |
2655 | } ext; | |
2656 | }; | |
2657 | ||
be9efd36 JP |
2658 | struct netdev_notifier_change_info { |
2659 | struct netdev_notifier_info info; /* must be first */ | |
2660 | unsigned int flags_changed; | |
2661 | }; | |
2662 | ||
0e4ead9d JP |
2663 | struct netdev_notifier_changeupper_info { |
2664 | struct netdev_notifier_info info; /* must be first */ | |
2665 | struct net_device *upper_dev; /* new upper dev */ | |
2666 | bool master; /* is upper dev master */ | |
5e82b4b2 | 2667 | bool linking; /* is the notification for link or unlink */ |
29bf24af | 2668 | void *upper_info; /* upper dev info */ |
0e4ead9d JP |
2669 | }; |
2670 | ||
04d48266 JP |
2671 | struct netdev_notifier_changelowerstate_info { |
2672 | struct netdev_notifier_info info; /* must be first */ | |
2673 | void *lower_state_info; /* is lower dev state */ | |
2674 | }; | |
2675 | ||
1570415f PM |
2676 | struct netdev_notifier_pre_changeaddr_info { |
2677 | struct netdev_notifier_info info; /* must be first */ | |
2678 | const unsigned char *dev_addr; | |
2679 | }; | |
2680 | ||
75538c2b CW |
2681 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
2682 | struct net_device *dev) | |
2683 | { | |
2684 | info->dev = dev; | |
51d0c047 | 2685 | info->extack = NULL; |
75538c2b CW |
2686 | } |
2687 | ||
351638e7 JP |
2688 | static inline struct net_device * |
2689 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
2690 | { | |
2691 | return info->dev; | |
2692 | } | |
2693 | ||
51d0c047 DA |
2694 | static inline struct netlink_ext_ack * |
2695 | netdev_notifier_info_to_extack(const struct netdev_notifier_info *info) | |
2696 | { | |
2697 | return info->extack; | |
2698 | } | |
2699 | ||
f629d208 | 2700 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
2701 | |
2702 | ||
1da177e4 LT |
2703 | extern rwlock_t dev_base_lock; /* Device list lock */ |
2704 | ||
881d966b EB |
2705 | #define for_each_netdev(net, d) \ |
2706 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
2707 | #define for_each_netdev_reverse(net, d) \ |
2708 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
2709 | #define for_each_netdev_rcu(net, d) \ |
2710 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
2711 | #define for_each_netdev_safe(net, d, n) \ |
2712 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
2713 | #define for_each_netdev_continue(net, d) \ | |
2714 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
afa0df59 JP |
2715 | #define for_each_netdev_continue_reverse(net, d) \ |
2716 | list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \ | |
2717 | dev_list) | |
254245d2 | 2718 | #define for_each_netdev_continue_rcu(net, d) \ |
2719 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 2720 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
2721 | for_each_netdev_rcu(&init_net, slave) \ | |
4ccce02e | 2722 | if (netdev_master_upper_dev_get_rcu(slave) == (bond)) |
881d966b | 2723 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 2724 | |
a050c33f DL |
2725 | static inline struct net_device *next_net_device(struct net_device *dev) |
2726 | { | |
2727 | struct list_head *lh; | |
2728 | struct net *net; | |
2729 | ||
c346dca1 | 2730 | net = dev_net(dev); |
a050c33f DL |
2731 | lh = dev->dev_list.next; |
2732 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2733 | } | |
2734 | ||
ce81b76a ED |
2735 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
2736 | { | |
2737 | struct list_head *lh; | |
2738 | struct net *net; | |
2739 | ||
2740 | net = dev_net(dev); | |
ccf43438 | 2741 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
2742 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2743 | } | |
2744 | ||
a050c33f DL |
2745 | static inline struct net_device *first_net_device(struct net *net) |
2746 | { | |
2747 | return list_empty(&net->dev_base_head) ? NULL : | |
2748 | net_device_entry(net->dev_base_head.next); | |
2749 | } | |
7562f876 | 2750 | |
ccf43438 ED |
2751 | static inline struct net_device *first_net_device_rcu(struct net *net) |
2752 | { | |
2753 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
2754 | ||
2755 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2756 | } | |
2757 | ||
f629d208 JP |
2758 | int netdev_boot_setup_check(struct net_device *dev); |
2759 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
2760 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
2761 | const char *hwaddr); | |
2762 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2763 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2764 | void dev_add_pack(struct packet_type *pt); | |
2765 | void dev_remove_pack(struct packet_type *pt); | |
2766 | void __dev_remove_pack(struct packet_type *pt); | |
2767 | void dev_add_offload(struct packet_offload *po); | |
2768 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 | 2769 | |
a54acb3a | 2770 | int dev_get_iflink(const struct net_device *dev); |
fc4099f1 | 2771 | int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); |
6c555490 WC |
2772 | struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
2773 | unsigned short mask); | |
f629d208 JP |
2774 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
2775 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
2776 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
2777 | int dev_alloc_name(struct net_device *dev, const char *name); | |
00f54e68 | 2778 | int dev_open(struct net_device *dev, struct netlink_ext_ack *extack); |
7051b88a | 2779 | void dev_close(struct net_device *dev); |
2780 | void dev_close_many(struct list_head *head, bool unlink); | |
f629d208 | 2781 | void dev_disable_lro(struct net_device *dev); |
0c4b51f0 | 2782 | int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); |
a4ea8a3d | 2783 | u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb, |
a350ecce | 2784 | struct net_device *sb_dev); |
a4ea8a3d | 2785 | u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb, |
a350ecce | 2786 | struct net_device *sb_dev); |
2b4aa3ce | 2787 | int dev_queue_xmit(struct sk_buff *skb); |
eadec877 | 2788 | int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev); |
865b03f2 | 2789 | int dev_direct_xmit(struct sk_buff *skb, u16 queue_id); |
f629d208 JP |
2790 | int register_netdevice(struct net_device *dev); |
2791 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
2792 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
2793 | static inline void unregister_netdevice(struct net_device *dev) |
2794 | { | |
2795 | unregister_netdevice_queue(dev, NULL); | |
2796 | } | |
2797 | ||
f629d208 JP |
2798 | int netdev_refcnt_read(const struct net_device *dev); |
2799 | void free_netdev(struct net_device *dev); | |
74d332c1 | 2800 | void netdev_freemem(struct net_device *dev); |
f629d208 | 2801 | int init_dummy_netdev(struct net_device *dev); |
937f1ba5 | 2802 | |
cff9f12b MG |
2803 | struct net_device *netdev_get_xmit_slave(struct net_device *dev, |
2804 | struct sk_buff *skb, | |
2805 | bool all_slaves); | |
f629d208 JP |
2806 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
2807 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
2808 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
90b602f8 | 2809 | struct net_device *dev_get_by_napi_id(unsigned int napi_id); |
f629d208 JP |
2810 | int netdev_get_name(struct net *net, char *name, int ifindex); |
2811 | int dev_restart(struct net_device *dev); | |
d4546c25 | 2812 | int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb); |
3a1296a3 | 2813 | int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb); |
86911732 HX |
2814 | |
2815 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
2816 | { | |
2817 | return NAPI_GRO_CB(skb)->data_offset; | |
2818 | } | |
2819 | ||
2820 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
2821 | { | |
2822 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
2823 | } | |
2824 | ||
2825 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
2826 | { | |
2827 | NAPI_GRO_CB(skb)->data_offset += len; | |
2828 | } | |
2829 | ||
a5b1cf28 HX |
2830 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
2831 | unsigned int offset) | |
86911732 | 2832 | { |
a5b1cf28 HX |
2833 | return NAPI_GRO_CB(skb)->frag0 + offset; |
2834 | } | |
78a478d0 | 2835 | |
a5b1cf28 HX |
2836 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
2837 | { | |
2838 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2839 | } | |
78a478d0 | 2840 | |
57ea52a8 HX |
2841 | static inline void skb_gro_frag0_invalidate(struct sk_buff *skb) |
2842 | { | |
2843 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
2844 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
2845 | } | |
2846 | ||
a5b1cf28 HX |
2847 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2848 | unsigned int offset) | |
2849 | { | |
17dd759c HX |
2850 | if (!pskb_may_pull(skb, hlen)) |
2851 | return NULL; | |
2852 | ||
57ea52a8 | 2853 | skb_gro_frag0_invalidate(skb); |
17dd759c | 2854 | return skb->data + offset; |
86911732 | 2855 | } |
1da177e4 | 2856 | |
36e7b1b8 HX |
2857 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2858 | { | |
78d3fd0b HX |
2859 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2860 | skb_network_offset(skb); | |
36e7b1b8 HX |
2861 | } |
2862 | ||
bf5a755f JC |
2863 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2864 | const void *start, unsigned int len) | |
2865 | { | |
573e8fca | 2866 | if (NAPI_GRO_CB(skb)->csum_valid) |
bf5a755f JC |
2867 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, |
2868 | csum_partial(start, len, 0)); | |
2869 | } | |
2870 | ||
573e8fca TH |
2871 | /* GRO checksum functions. These are logical equivalents of the normal |
2872 | * checksum functions (in skbuff.h) except that they operate on the GRO | |
2873 | * offsets and fields in sk_buff. | |
2874 | */ | |
2875 | ||
2876 | __sum16 __skb_gro_checksum_complete(struct sk_buff *skb); | |
2877 | ||
15e2396d TH |
2878 | static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb) |
2879 | { | |
b7fe10e5 | 2880 | return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb)); |
15e2396d TH |
2881 | } |
2882 | ||
573e8fca TH |
2883 | static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, |
2884 | bool zero_okay, | |
2885 | __sum16 check) | |
2886 | { | |
6edec0e6 TH |
2887 | return ((skb->ip_summed != CHECKSUM_PARTIAL || |
2888 | skb_checksum_start_offset(skb) < | |
2889 | skb_gro_offset(skb)) && | |
15e2396d | 2890 | !skb_at_gro_remcsum_start(skb) && |
662880f4 | 2891 | NAPI_GRO_CB(skb)->csum_cnt == 0 && |
573e8fca TH |
2892 | (!zero_okay || check)); |
2893 | } | |
2894 | ||
2895 | static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, | |
2896 | __wsum psum) | |
2897 | { | |
2898 | if (NAPI_GRO_CB(skb)->csum_valid && | |
2899 | !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum))) | |
2900 | return 0; | |
2901 | ||
2902 | NAPI_GRO_CB(skb)->csum = psum; | |
2903 | ||
2904 | return __skb_gro_checksum_complete(skb); | |
2905 | } | |
2906 | ||
573e8fca TH |
2907 | static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) |
2908 | { | |
662880f4 TH |
2909 | if (NAPI_GRO_CB(skb)->csum_cnt > 0) { |
2910 | /* Consume a checksum from CHECKSUM_UNNECESSARY */ | |
2911 | NAPI_GRO_CB(skb)->csum_cnt--; | |
2912 | } else { | |
2913 | /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we | |
2914 | * verified a new top level checksum or an encapsulated one | |
2915 | * during GRO. This saves work if we fallback to normal path. | |
2916 | */ | |
2917 | __skb_incr_checksum_unnecessary(skb); | |
573e8fca TH |
2918 | } |
2919 | } | |
2920 | ||
2921 | #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \ | |
2922 | compute_pseudo) \ | |
2923 | ({ \ | |
2924 | __sum16 __ret = 0; \ | |
2925 | if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \ | |
2926 | __ret = __skb_gro_checksum_validate_complete(skb, \ | |
2927 | compute_pseudo(skb, proto)); \ | |
219f1d79 | 2928 | if (!__ret) \ |
573e8fca TH |
2929 | skb_gro_incr_csum_unnecessary(skb); \ |
2930 | __ret; \ | |
2931 | }) | |
2932 | ||
2933 | #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \ | |
2934 | __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo) | |
2935 | ||
2936 | #define skb_gro_checksum_validate_zero_check(skb, proto, check, \ | |
2937 | compute_pseudo) \ | |
2938 | __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo) | |
2939 | ||
2940 | #define skb_gro_checksum_simple_validate(skb) \ | |
2941 | __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo) | |
2942 | ||
d96535a1 TH |
2943 | static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb) |
2944 | { | |
2945 | return (NAPI_GRO_CB(skb)->csum_cnt == 0 && | |
2946 | !NAPI_GRO_CB(skb)->csum_valid); | |
2947 | } | |
2948 | ||
2949 | static inline void __skb_gro_checksum_convert(struct sk_buff *skb, | |
b39c78b2 | 2950 | __wsum pseudo) |
d96535a1 TH |
2951 | { |
2952 | NAPI_GRO_CB(skb)->csum = ~pseudo; | |
2953 | NAPI_GRO_CB(skb)->csum_valid = 1; | |
2954 | } | |
2955 | ||
b39c78b2 | 2956 | #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \ |
d96535a1 TH |
2957 | do { \ |
2958 | if (__skb_gro_checksum_convert_check(skb)) \ | |
b39c78b2 | 2959 | __skb_gro_checksum_convert(skb, \ |
d96535a1 TH |
2960 | compute_pseudo(skb, proto)); \ |
2961 | } while (0) | |
2962 | ||
26c4f7da TH |
2963 | struct gro_remcsum { |
2964 | int offset; | |
2965 | __wsum delta; | |
2966 | }; | |
2967 | ||
2968 | static inline void skb_gro_remcsum_init(struct gro_remcsum *grc) | |
2969 | { | |
846cd667 | 2970 | grc->offset = 0; |
26c4f7da TH |
2971 | grc->delta = 0; |
2972 | } | |
2973 | ||
b7fe10e5 TH |
2974 | static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, |
2975 | unsigned int off, size_t hdrlen, | |
2976 | int start, int offset, | |
2977 | struct gro_remcsum *grc, | |
2978 | bool nopartial) | |
dcdc8994 TH |
2979 | { |
2980 | __wsum delta; | |
b7fe10e5 | 2981 | size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start); |
dcdc8994 TH |
2982 | |
2983 | BUG_ON(!NAPI_GRO_CB(skb)->csum_valid); | |
2984 | ||
15e2396d | 2985 | if (!nopartial) { |
b7fe10e5 TH |
2986 | NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start; |
2987 | return ptr; | |
2988 | } | |
2989 | ||
2990 | ptr = skb_gro_header_fast(skb, off); | |
2991 | if (skb_gro_header_hard(skb, off + plen)) { | |
2992 | ptr = skb_gro_header_slow(skb, off + plen, off); | |
2993 | if (!ptr) | |
2994 | return NULL; | |
15e2396d TH |
2995 | } |
2996 | ||
b7fe10e5 TH |
2997 | delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum, |
2998 | start, offset); | |
dcdc8994 TH |
2999 | |
3000 | /* Adjust skb->csum since we changed the packet */ | |
dcdc8994 | 3001 | NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); |
26c4f7da | 3002 | |
b7fe10e5 | 3003 | grc->offset = off + hdrlen + offset; |
26c4f7da | 3004 | grc->delta = delta; |
b7fe10e5 TH |
3005 | |
3006 | return ptr; | |
dcdc8994 TH |
3007 | } |
3008 | ||
26c4f7da TH |
3009 | static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, |
3010 | struct gro_remcsum *grc) | |
3011 | { | |
b7fe10e5 TH |
3012 | void *ptr; |
3013 | size_t plen = grc->offset + sizeof(u16); | |
3014 | ||
26c4f7da TH |
3015 | if (!grc->delta) |
3016 | return; | |
3017 | ||
b7fe10e5 TH |
3018 | ptr = skb_gro_header_fast(skb, grc->offset); |
3019 | if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) { | |
3020 | ptr = skb_gro_header_slow(skb, plen, grc->offset); | |
3021 | if (!ptr) | |
3022 | return; | |
3023 | } | |
3024 | ||
3025 | remcsum_unadjust((__sum16 *)ptr, grc->delta); | |
26c4f7da | 3026 | } |
dcdc8994 | 3027 | |
25393d3f | 3028 | #ifdef CONFIG_XFRM_OFFLOAD |
d4546c25 | 3029 | static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush) |
25393d3f SK |
3030 | { |
3031 | if (PTR_ERR(pp) != -EINPROGRESS) | |
3032 | NAPI_GRO_CB(skb)->flush |= flush; | |
3033 | } | |
603d4cf8 | 3034 | static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb, |
5cd3da4b | 3035 | struct sk_buff *pp, |
603d4cf8 SD |
3036 | int flush, |
3037 | struct gro_remcsum *grc) | |
3038 | { | |
3039 | if (PTR_ERR(pp) != -EINPROGRESS) { | |
3040 | NAPI_GRO_CB(skb)->flush |= flush; | |
3041 | skb_gro_remcsum_cleanup(skb, grc); | |
3042 | skb->remcsum_offload = 0; | |
3043 | } | |
3044 | } | |
25393d3f | 3045 | #else |
d4546c25 | 3046 | static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush) |
5f114163 SK |
3047 | { |
3048 | NAPI_GRO_CB(skb)->flush |= flush; | |
3049 | } | |
603d4cf8 | 3050 | static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb, |
5cd3da4b | 3051 | struct sk_buff *pp, |
603d4cf8 SD |
3052 | int flush, |
3053 | struct gro_remcsum *grc) | |
3054 | { | |
3055 | NAPI_GRO_CB(skb)->flush |= flush; | |
3056 | skb_gro_remcsum_cleanup(skb, grc); | |
3057 | skb->remcsum_offload = 0; | |
3058 | } | |
25393d3f | 3059 | #endif |
5f114163 | 3060 | |
0c4e8581 SH |
3061 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
3062 | unsigned short type, | |
3b04ddde | 3063 | const void *daddr, const void *saddr, |
95c96174 | 3064 | unsigned int len) |
0c4e8581 | 3065 | { |
f1ecfd5d | 3066 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 3067 | return 0; |
3b04ddde SH |
3068 | |
3069 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
3070 | } |
3071 | ||
b95cce35 SH |
3072 | static inline int dev_parse_header(const struct sk_buff *skb, |
3073 | unsigned char *haddr) | |
3074 | { | |
3075 | const struct net_device *dev = skb->dev; | |
3076 | ||
1b83336b | 3077 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 3078 | return 0; |
3b04ddde | 3079 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
3080 | } |
3081 | ||
e78b2915 MM |
3082 | static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb) |
3083 | { | |
3084 | const struct net_device *dev = skb->dev; | |
3085 | ||
3086 | if (!dev->header_ops || !dev->header_ops->parse_protocol) | |
3087 | return 0; | |
3088 | return dev->header_ops->parse_protocol(skb); | |
3089 | } | |
3090 | ||
2793a23a WB |
3091 | /* ll_header must have at least hard_header_len allocated */ |
3092 | static inline bool dev_validate_header(const struct net_device *dev, | |
3093 | char *ll_header, int len) | |
3094 | { | |
3095 | if (likely(len >= dev->hard_header_len)) | |
3096 | return true; | |
217e6fa2 WB |
3097 | if (len < dev->min_header_len) |
3098 | return false; | |
2793a23a WB |
3099 | |
3100 | if (capable(CAP_SYS_RAWIO)) { | |
3101 | memset(ll_header + len, 0, dev->hard_header_len - len); | |
3102 | return true; | |
3103 | } | |
3104 | ||
3105 | if (dev->header_ops && dev->header_ops->validate) | |
3106 | return dev->header_ops->validate(ll_header, len); | |
3107 | ||
3108 | return false; | |
3109 | } | |
3110 | ||
36fd633e AV |
3111 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, |
3112 | int len, int size); | |
f629d208 | 3113 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
3114 | static inline int unregister_gifconf(unsigned int family) |
3115 | { | |
3116 | return register_gifconf(family, NULL); | |
3117 | } | |
3118 | ||
99bbc707 | 3119 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 3120 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
3121 | struct sd_flow_limit { |
3122 | u64 count; | |
3123 | unsigned int num_buckets; | |
3124 | unsigned int history_head; | |
3125 | u16 history[FLOW_LIMIT_HISTORY]; | |
3126 | u8 buckets[]; | |
3127 | }; | |
3128 | ||
3129 | extern int netdev_flow_limit_table_len; | |
3130 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
3131 | ||
1da177e4 | 3132 | /* |
5e82b4b2 | 3133 | * Incoming packets are placed on per-CPU queues |
1da177e4 | 3134 | */ |
d94d9fee | 3135 | struct softnet_data { |
1da177e4 | 3136 | struct list_head poll_list; |
6e7676c1 | 3137 | struct sk_buff_head process_queue; |
1da177e4 | 3138 | |
dee42870 | 3139 | /* stats */ |
cd7b5396 DM |
3140 | unsigned int processed; |
3141 | unsigned int time_squeeze; | |
cd7b5396 | 3142 | unsigned int received_rps; |
fd793d89 | 3143 | #ifdef CONFIG_RPS |
88751275 | 3144 | struct softnet_data *rps_ipi_list; |
4cdb1e2e ED |
3145 | #endif |
3146 | #ifdef CONFIG_NET_FLOW_LIMIT | |
3147 | struct sd_flow_limit __rcu *flow_limit; | |
3148 | #endif | |
3149 | struct Qdisc *output_queue; | |
3150 | struct Qdisc **output_queue_tailp; | |
3151 | struct sk_buff *completion_queue; | |
f53c7239 SK |
3152 | #ifdef CONFIG_XFRM_OFFLOAD |
3153 | struct sk_buff_head xfrm_backlog; | |
3154 | #endif | |
97cdcf37 FW |
3155 | /* written and read only by owning cpu: */ |
3156 | struct { | |
3157 | u16 recursion; | |
3158 | u8 more; | |
3159 | } xmit; | |
4cdb1e2e | 3160 | #ifdef CONFIG_RPS |
501e7ef5 ED |
3161 | /* input_queue_head should be written by cpu owning this struct, |
3162 | * and only read by other cpus. Worth using a cache line. | |
3163 | */ | |
3164 | unsigned int input_queue_head ____cacheline_aligned_in_smp; | |
3165 | ||
3166 | /* Elements below can be accessed between CPUs for RPS/RFS */ | |
966a9671 | 3167 | call_single_data_t csd ____cacheline_aligned_in_smp; |
88751275 ED |
3168 | struct softnet_data *rps_ipi_next; |
3169 | unsigned int cpu; | |
76cc8b13 | 3170 | unsigned int input_queue_tail; |
1e94d72f | 3171 | #endif |
95c96174 | 3172 | unsigned int dropped; |
0a9627f2 | 3173 | struct sk_buff_head input_pkt_queue; |
bea3348e | 3174 | struct napi_struct backlog; |
99bbc707 | 3175 | |
1da177e4 LT |
3176 | }; |
3177 | ||
76cc8b13 | 3178 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
3179 | { |
3180 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
3181 | sd->input_queue_head++; |
3182 | #endif | |
3183 | } | |
3184 | ||
3185 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
3186 | unsigned int *qtail) | |
3187 | { | |
3188 | #ifdef CONFIG_RPS | |
3189 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
3190 | #endif |
3191 | } | |
3192 | ||
0a9627f2 | 3193 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 3194 | |
97cdcf37 FW |
3195 | static inline int dev_recursion_level(void) |
3196 | { | |
28b05b92 | 3197 | return this_cpu_read(softnet_data.xmit.recursion); |
97cdcf37 FW |
3198 | } |
3199 | ||
fb7861d1 | 3200 | #define XMIT_RECURSION_LIMIT 8 |
97cdcf37 FW |
3201 | static inline bool dev_xmit_recursion(void) |
3202 | { | |
3203 | return unlikely(__this_cpu_read(softnet_data.xmit.recursion) > | |
3204 | XMIT_RECURSION_LIMIT); | |
3205 | } | |
3206 | ||
3207 | static inline void dev_xmit_recursion_inc(void) | |
3208 | { | |
3209 | __this_cpu_inc(softnet_data.xmit.recursion); | |
3210 | } | |
3211 | ||
3212 | static inline void dev_xmit_recursion_dec(void) | |
3213 | { | |
3214 | __this_cpu_dec(softnet_data.xmit.recursion); | |
3215 | } | |
3216 | ||
f629d208 | 3217 | void __netif_schedule(struct Qdisc *q); |
46e5da40 | 3218 | void netif_schedule_queue(struct netdev_queue *txq); |
86d804e1 | 3219 | |
fd2ea0a7 DM |
3220 | static inline void netif_tx_schedule_all(struct net_device *dev) |
3221 | { | |
3222 | unsigned int i; | |
3223 | ||
3224 | for (i = 0; i < dev->num_tx_queues; i++) | |
3225 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
3226 | } | |
3227 | ||
f9a7cbbf | 3228 | static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
d29f749e | 3229 | { |
73466498 | 3230 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
3231 | } |
3232 | ||
bea3348e SH |
3233 | /** |
3234 | * netif_start_queue - allow transmit | |
3235 | * @dev: network device | |
3236 | * | |
3237 | * Allow upper layers to call the device hard_start_xmit routine. | |
3238 | */ | |
1da177e4 LT |
3239 | static inline void netif_start_queue(struct net_device *dev) |
3240 | { | |
e8a0464c | 3241 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
3242 | } |
3243 | ||
fd2ea0a7 DM |
3244 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
3245 | { | |
3246 | unsigned int i; | |
3247 | ||
3248 | for (i = 0; i < dev->num_tx_queues; i++) { | |
3249 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
3250 | netif_tx_start_queue(txq); | |
3251 | } | |
3252 | } | |
3253 | ||
46e5da40 | 3254 | void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
79d16385 | 3255 | |
d29f749e DJ |
3256 | /** |
3257 | * netif_wake_queue - restart transmit | |
3258 | * @dev: network device | |
3259 | * | |
3260 | * Allow upper layers to call the device hard_start_xmit routine. | |
3261 | * Used for flow control when transmit resources are available. | |
3262 | */ | |
79d16385 DM |
3263 | static inline void netif_wake_queue(struct net_device *dev) |
3264 | { | |
e8a0464c | 3265 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
3266 | } |
3267 | ||
fd2ea0a7 DM |
3268 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
3269 | { | |
3270 | unsigned int i; | |
3271 | ||
3272 | for (i = 0; i < dev->num_tx_queues; i++) { | |
3273 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
3274 | netif_tx_wake_queue(txq); | |
3275 | } | |
3276 | } | |
3277 | ||
f9a7cbbf | 3278 | static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
d29f749e | 3279 | { |
73466498 | 3280 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
3281 | } |
3282 | ||
bea3348e SH |
3283 | /** |
3284 | * netif_stop_queue - stop transmitted packets | |
3285 | * @dev: network device | |
3286 | * | |
3287 | * Stop upper layers calling the device hard_start_xmit routine. | |
3288 | * Used for flow control when transmit resources are unavailable. | |
3289 | */ | |
1da177e4 LT |
3290 | static inline void netif_stop_queue(struct net_device *dev) |
3291 | { | |
e8a0464c | 3292 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
3293 | } |
3294 | ||
a2029240 | 3295 | void netif_tx_stop_all_queues(struct net_device *dev); |
fd2ea0a7 | 3296 | |
4d29515f | 3297 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 3298 | { |
73466498 | 3299 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
3300 | } |
3301 | ||
bea3348e SH |
3302 | /** |
3303 | * netif_queue_stopped - test if transmit queue is flowblocked | |
3304 | * @dev: network device | |
3305 | * | |
3306 | * Test if transmit queue on device is currently unable to send. | |
3307 | */ | |
4d29515f | 3308 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 3309 | { |
e8a0464c | 3310 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
3311 | } |
3312 | ||
4d29515f | 3313 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 3314 | { |
73466498 TH |
3315 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
3316 | } | |
3317 | ||
8e2f1a63 DB |
3318 | static inline bool |
3319 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) | |
73466498 TH |
3320 | { |
3321 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
3322 | } | |
3323 | ||
8e2f1a63 DB |
3324 | static inline bool |
3325 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) | |
3326 | { | |
3327 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; | |
3328 | } | |
3329 | ||
53511453 ED |
3330 | /** |
3331 | * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write | |
3332 | * @dev_queue: pointer to transmit queue | |
3333 | * | |
3334 | * BQL enabled drivers might use this helper in their ndo_start_xmit(), | |
5e82b4b2 | 3335 | * to give appropriate hint to the CPU. |
53511453 ED |
3336 | */ |
3337 | static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) | |
3338 | { | |
3339 | #ifdef CONFIG_BQL | |
3340 | prefetchw(&dev_queue->dql.num_queued); | |
3341 | #endif | |
3342 | } | |
3343 | ||
3344 | /** | |
3345 | * netdev_txq_bql_complete_prefetchw - prefetch bql data for write | |
3346 | * @dev_queue: pointer to transmit queue | |
3347 | * | |
3348 | * BQL enabled drivers might use this helper in their TX completion path, | |
5e82b4b2 | 3349 | * to give appropriate hint to the CPU. |
53511453 ED |
3350 | */ |
3351 | static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) | |
3352 | { | |
3353 | #ifdef CONFIG_BQL | |
3354 | prefetchw(&dev_queue->dql.limit); | |
3355 | #endif | |
3356 | } | |
3357 | ||
c5d67bd7 TH |
3358 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
3359 | unsigned int bytes) | |
3360 | { | |
114cf580 TH |
3361 | #ifdef CONFIG_BQL |
3362 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
3363 | |
3364 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
3365 | return; | |
3366 | ||
3367 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
3368 | ||
3369 | /* | |
3370 | * The XOFF flag must be set before checking the dql_avail below, | |
3371 | * because in netdev_tx_completed_queue we update the dql_completed | |
3372 | * before checking the XOFF flag. | |
3373 | */ | |
3374 | smp_mb(); | |
3375 | ||
3376 | /* check again in case another CPU has just made room avail */ | |
3377 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
3378 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 3379 | #endif |
c5d67bd7 TH |
3380 | } |
3381 | ||
3e59020a ED |
3382 | /* Variant of netdev_tx_sent_queue() for drivers that are aware |
3383 | * that they should not test BQL status themselves. | |
3384 | * We do want to change __QUEUE_STATE_STACK_XOFF only for the last | |
3385 | * skb of a batch. | |
3386 | * Returns true if the doorbell must be used to kick the NIC. | |
3387 | */ | |
3388 | static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue, | |
3389 | unsigned int bytes, | |
3390 | bool xmit_more) | |
3391 | { | |
3392 | if (xmit_more) { | |
3393 | #ifdef CONFIG_BQL | |
3394 | dql_queued(&dev_queue->dql, bytes); | |
3395 | #endif | |
3396 | return netif_tx_queue_stopped(dev_queue); | |
3397 | } | |
3398 | netdev_tx_sent_queue(dev_queue, bytes); | |
3399 | return true; | |
3400 | } | |
3401 | ||
0042d0c8 FF |
3402 | /** |
3403 | * netdev_sent_queue - report the number of bytes queued to hardware | |
3404 | * @dev: network device | |
3405 | * @bytes: number of bytes queued to the hardware device queue | |
3406 | * | |
3407 | * Report the number of bytes queued for sending/completion to the network | |
3408 | * device hardware queue. @bytes should be a good approximation and should | |
3409 | * exactly match netdev_completed_queue() @bytes | |
3410 | */ | |
c5d67bd7 TH |
3411 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
3412 | { | |
3413 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
3414 | } | |
3415 | ||
620344c4 HK |
3416 | static inline bool __netdev_sent_queue(struct net_device *dev, |
3417 | unsigned int bytes, | |
3418 | bool xmit_more) | |
3419 | { | |
3420 | return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes, | |
3421 | xmit_more); | |
3422 | } | |
3423 | ||
c5d67bd7 | 3424 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, |
95c96174 | 3425 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 3426 | { |
114cf580 | 3427 | #ifdef CONFIG_BQL |
b37c0fbe AD |
3428 | if (unlikely(!bytes)) |
3429 | return; | |
3430 | ||
3431 | dql_completed(&dev_queue->dql, bytes); | |
3432 | ||
3433 | /* | |
3434 | * Without the memory barrier there is a small possiblity that | |
3435 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
3436 | * be stopped forever | |
3437 | */ | |
3438 | smp_mb(); | |
3439 | ||
f3acd33d | 3440 | if (unlikely(dql_avail(&dev_queue->dql) < 0)) |
b37c0fbe AD |
3441 | return; |
3442 | ||
3443 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
3444 | netif_schedule_queue(dev_queue); | |
114cf580 | 3445 | #endif |
c5d67bd7 TH |
3446 | } |
3447 | ||
0042d0c8 FF |
3448 | /** |
3449 | * netdev_completed_queue - report bytes and packets completed by device | |
3450 | * @dev: network device | |
3451 | * @pkts: actual number of packets sent over the medium | |
3452 | * @bytes: actual number of bytes sent over the medium | |
3453 | * | |
3454 | * Report the number of bytes and packets transmitted by the network device | |
3455 | * hardware queue over the physical medium, @bytes must exactly match the | |
3456 | * @bytes amount passed to netdev_sent_queue() | |
3457 | */ | |
c5d67bd7 | 3458 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 3459 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
3460 | { |
3461 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
3462 | } | |
3463 | ||
3464 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
3465 | { | |
114cf580 | 3466 | #ifdef CONFIG_BQL |
5c490354 | 3467 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
3468 | dql_reset(&q->dql); |
3469 | #endif | |
c5d67bd7 TH |
3470 | } |
3471 | ||
0042d0c8 FF |
3472 | /** |
3473 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
3474 | * @dev_queue: network device | |
3475 | * | |
3476 | * Reset the bytes and packet count of a network device and clear the | |
3477 | * software flow control OFF bit for this network device | |
3478 | */ | |
c5d67bd7 TH |
3479 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
3480 | { | |
3481 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
3482 | } |
3483 | ||
b9507bda DB |
3484 | /** |
3485 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
3486 | * @dev: network device | |
3487 | * @queue_index: given tx queue index | |
3488 | * | |
3489 | * Returns 0 if given tx queue index >= number of device tx queues, | |
3490 | * otherwise returns the originally passed tx queue index. | |
3491 | */ | |
3492 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
3493 | { | |
3494 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
3495 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
3496 | dev->name, queue_index, | |
3497 | dev->real_num_tx_queues); | |
3498 | return 0; | |
3499 | } | |
3500 | ||
3501 | return queue_index; | |
3502 | } | |
3503 | ||
bea3348e SH |
3504 | /** |
3505 | * netif_running - test if up | |
3506 | * @dev: network device | |
3507 | * | |
3508 | * Test if the device has been brought up. | |
3509 | */ | |
4d29515f | 3510 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
3511 | { |
3512 | return test_bit(__LINK_STATE_START, &dev->state); | |
3513 | } | |
3514 | ||
f25f4e44 | 3515 | /* |
5e82b4b2 | 3516 | * Routines to manage the subqueues on a device. We only need start, |
f25f4e44 PWJ |
3517 | * stop, and a check if it's stopped. All other device management is |
3518 | * done at the overall netdevice level. | |
3519 | * Also test the device if we're multiqueue. | |
3520 | */ | |
bea3348e SH |
3521 | |
3522 | /** | |
3523 | * netif_start_subqueue - allow sending packets on subqueue | |
3524 | * @dev: network device | |
3525 | * @queue_index: sub queue index | |
3526 | * | |
3527 | * Start individual transmit queue of a device with multiple transmit queues. | |
3528 | */ | |
f25f4e44 PWJ |
3529 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
3530 | { | |
fd2ea0a7 | 3531 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3532 | |
3533 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
3534 | } |
3535 | ||
bea3348e SH |
3536 | /** |
3537 | * netif_stop_subqueue - stop sending packets on subqueue | |
3538 | * @dev: network device | |
3539 | * @queue_index: sub queue index | |
3540 | * | |
3541 | * Stop individual transmit queue of a device with multiple transmit queues. | |
3542 | */ | |
f25f4e44 PWJ |
3543 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
3544 | { | |
fd2ea0a7 | 3545 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 3546 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
3547 | } |
3548 | ||
bea3348e SH |
3549 | /** |
3550 | * netif_subqueue_stopped - test status of subqueue | |
3551 | * @dev: network device | |
3552 | * @queue_index: sub queue index | |
3553 | * | |
3554 | * Check individual transmit queue of a device with multiple transmit queues. | |
3555 | */ | |
4d29515f DM |
3556 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
3557 | u16 queue_index) | |
f25f4e44 | 3558 | { |
fd2ea0a7 | 3559 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3560 | |
3561 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
3562 | } |
3563 | ||
4d29515f DM |
3564 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
3565 | struct sk_buff *skb) | |
668f895a PE |
3566 | { |
3567 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
3568 | } | |
bea3348e | 3569 | |
738b35cc FF |
3570 | /** |
3571 | * netif_wake_subqueue - allow sending packets on subqueue | |
3572 | * @dev: network device | |
3573 | * @queue_index: sub queue index | |
3574 | * | |
3575 | * Resume individual transmit queue of a device with multiple transmit queues. | |
3576 | */ | |
3577 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
3578 | { | |
3579 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
3580 | ||
3581 | netif_tx_wake_queue(txq); | |
3582 | } | |
f25f4e44 | 3583 | |
537c00de | 3584 | #ifdef CONFIG_XPS |
53af53ae | 3585 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 3586 | u16 index); |
80d19669 AN |
3587 | int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask, |
3588 | u16 index, bool is_rxqs_map); | |
3589 | ||
3590 | /** | |
3591 | * netif_attr_test_mask - Test a CPU or Rx queue set in a mask | |
3592 | * @j: CPU/Rx queue index | |
3593 | * @mask: bitmask of all cpus/rx queues | |
3594 | * @nr_bits: number of bits in the bitmask | |
3595 | * | |
3596 | * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues. | |
3597 | */ | |
3598 | static inline bool netif_attr_test_mask(unsigned long j, | |
3599 | const unsigned long *mask, | |
3600 | unsigned int nr_bits) | |
3601 | { | |
3602 | cpu_max_bits_warn(j, nr_bits); | |
3603 | return test_bit(j, mask); | |
3604 | } | |
3605 | ||
3606 | /** | |
3607 | * netif_attr_test_online - Test for online CPU/Rx queue | |
3608 | * @j: CPU/Rx queue index | |
3609 | * @online_mask: bitmask for CPUs/Rx queues that are online | |
3610 | * @nr_bits: number of bits in the bitmask | |
3611 | * | |
3612 | * Returns true if a CPU/Rx queue is online. | |
3613 | */ | |
3614 | static inline bool netif_attr_test_online(unsigned long j, | |
3615 | const unsigned long *online_mask, | |
3616 | unsigned int nr_bits) | |
3617 | { | |
3618 | cpu_max_bits_warn(j, nr_bits); | |
3619 | ||
3620 | if (online_mask) | |
3621 | return test_bit(j, online_mask); | |
3622 | ||
3623 | return (j < nr_bits); | |
3624 | } | |
3625 | ||
3626 | /** | |
3627 | * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask | |
3628 | * @n: CPU/Rx queue index | |
3629 | * @srcp: the cpumask/Rx queue mask pointer | |
3630 | * @nr_bits: number of bits in the bitmask | |
3631 | * | |
3632 | * Returns >= nr_bits if no further CPUs/Rx queues set. | |
3633 | */ | |
3634 | static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp, | |
3635 | unsigned int nr_bits) | |
3636 | { | |
3637 | /* -1 is a legal arg here. */ | |
3638 | if (n != -1) | |
3639 | cpu_max_bits_warn(n, nr_bits); | |
3640 | ||
3641 | if (srcp) | |
3642 | return find_next_bit(srcp, nr_bits, n + 1); | |
3643 | ||
3644 | return n + 1; | |
3645 | } | |
3646 | ||
3647 | /** | |
a1fa83bd | 3648 | * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p |
80d19669 AN |
3649 | * @n: CPU/Rx queue index |
3650 | * @src1p: the first CPUs/Rx queues mask pointer | |
3651 | * @src2p: the second CPUs/Rx queues mask pointer | |
3652 | * @nr_bits: number of bits in the bitmask | |
3653 | * | |
3654 | * Returns >= nr_bits if no further CPUs/Rx queues set in both. | |
3655 | */ | |
3656 | static inline int netif_attrmask_next_and(int n, const unsigned long *src1p, | |
3657 | const unsigned long *src2p, | |
3658 | unsigned int nr_bits) | |
3659 | { | |
3660 | /* -1 is a legal arg here. */ | |
3661 | if (n != -1) | |
3662 | cpu_max_bits_warn(n, nr_bits); | |
3663 | ||
3664 | if (src1p && src2p) | |
3665 | return find_next_and_bit(src1p, src2p, nr_bits, n + 1); | |
3666 | else if (src1p) | |
3667 | return find_next_bit(src1p, nr_bits, n + 1); | |
3668 | else if (src2p) | |
3669 | return find_next_bit(src2p, nr_bits, n + 1); | |
3670 | ||
3671 | return n + 1; | |
3672 | } | |
537c00de AD |
3673 | #else |
3674 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 3675 | const struct cpumask *mask, |
537c00de AD |
3676 | u16 index) |
3677 | { | |
3678 | return 0; | |
3679 | } | |
c9fbb2d2 KK |
3680 | |
3681 | static inline int __netif_set_xps_queue(struct net_device *dev, | |
3682 | const unsigned long *mask, | |
3683 | u16 index, bool is_rxqs_map) | |
3684 | { | |
3685 | return 0; | |
3686 | } | |
537c00de AD |
3687 | #endif |
3688 | ||
bea3348e SH |
3689 | /** |
3690 | * netif_is_multiqueue - test if device has multiple transmit queues | |
3691 | * @dev: network device | |
3692 | * | |
3693 | * Check if device has multiple transmit queues | |
bea3348e | 3694 | */ |
4d29515f | 3695 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 3696 | { |
a02cec21 | 3697 | return dev->num_tx_queues > 1; |
f25f4e44 | 3698 | } |
1da177e4 | 3699 | |
f629d208 | 3700 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 3701 | |
a953be53 | 3702 | #ifdef CONFIG_SYSFS |
f629d208 | 3703 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
3704 | #else |
3705 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
c29c2ebd | 3706 | unsigned int rxqs) |
62fe0b40 | 3707 | { |
c29c2ebd | 3708 | dev->real_num_rx_queues = rxqs; |
62fe0b40 BH |
3709 | return 0; |
3710 | } | |
3711 | #endif | |
3712 | ||
65073a67 DB |
3713 | static inline struct netdev_rx_queue * |
3714 | __netif_get_rx_queue(struct net_device *dev, unsigned int rxq) | |
3715 | { | |
3716 | return dev->_rx + rxq; | |
3717 | } | |
3718 | ||
a953be53 MD |
3719 | #ifdef CONFIG_SYSFS |
3720 | static inline unsigned int get_netdev_rx_queue_index( | |
3721 | struct netdev_rx_queue *queue) | |
3722 | { | |
3723 | struct net_device *dev = queue->dev; | |
3724 | int index = queue - dev->_rx; | |
3725 | ||
3726 | BUG_ON(index >= dev->num_rx_queues); | |
3727 | return index; | |
3728 | } | |
3729 | #endif | |
3730 | ||
16917b87 | 3731 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 3732 | int netif_get_num_default_rss_queues(void); |
16917b87 | 3733 | |
e6247027 ED |
3734 | enum skb_free_reason { |
3735 | SKB_REASON_CONSUMED, | |
3736 | SKB_REASON_DROPPED, | |
3737 | }; | |
3738 | ||
3739 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
3740 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 3741 | |
e6247027 ED |
3742 | /* |
3743 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
3744 | * interrupt context or with hardware interrupts being disabled. | |
3745 | * (in_irq() || irqs_disabled()) | |
3746 | * | |
3747 | * We provide four helpers that can be used in following contexts : | |
3748 | * | |
3749 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
3750 | * replacing kfree_skb(skb) | |
3751 | * | |
3752 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
3753 | * Typically used in place of consume_skb(skb) in TX completion path | |
3754 | * | |
3755 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
3756 | * replacing kfree_skb(skb) | |
3757 | * | |
3758 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
3759 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 3760 | */ |
e6247027 ED |
3761 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
3762 | { | |
3763 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
3764 | } | |
3765 | ||
3766 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
3767 | { | |
3768 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
3769 | } | |
3770 | ||
3771 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
3772 | { | |
3773 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
3774 | } | |
3775 | ||
3776 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
3777 | { | |
3778 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
3779 | } | |
1da177e4 | 3780 | |
7c497478 JW |
3781 | void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog); |
3782 | int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb); | |
f629d208 JP |
3783 | int netif_rx(struct sk_buff *skb); |
3784 | int netif_rx_ni(struct sk_buff *skb); | |
04eb4489 | 3785 | int netif_receive_skb(struct sk_buff *skb); |
1c601d82 | 3786 | int netif_receive_skb_core(struct sk_buff *skb); |
f6ad8c1b | 3787 | void netif_receive_skb_list(struct list_head *head); |
f629d208 JP |
3788 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); |
3789 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
3790 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
3791 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
3792 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
3793 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
3794 | |
3795 | static inline void napi_free_frags(struct napi_struct *napi) | |
3796 | { | |
3797 | kfree_skb(napi->skb); | |
3798 | napi->skb = NULL; | |
3799 | } | |
3800 | ||
24b27fc4 | 3801 | bool netdev_is_rx_handler_busy(struct net_device *dev); |
f629d208 JP |
3802 | int netdev_rx_handler_register(struct net_device *dev, |
3803 | rx_handler_func_t *rx_handler, | |
3804 | void *rx_handler_data); | |
3805 | void netdev_rx_handler_unregister(struct net_device *dev); | |
3806 | ||
3807 | bool dev_valid_name(const char *name); | |
44c02a2c AV |
3808 | int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, |
3809 | bool *need_copyout); | |
36fd633e | 3810 | int dev_ifconf(struct net *net, struct ifconf *, int); |
f629d208 JP |
3811 | int dev_ethtool(struct net *net, struct ifreq *); |
3812 | unsigned int dev_get_flags(const struct net_device *); | |
6d040321 PM |
3813 | int __dev_change_flags(struct net_device *dev, unsigned int flags, |
3814 | struct netlink_ext_ack *extack); | |
567c5e13 PM |
3815 | int dev_change_flags(struct net_device *dev, unsigned int flags, |
3816 | struct netlink_ext_ack *extack); | |
cb178190 DM |
3817 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
3818 | unsigned int gchanges); | |
f629d208 JP |
3819 | int dev_change_name(struct net_device *, const char *); |
3820 | int dev_set_alias(struct net_device *, const char *, size_t); | |
6c557001 | 3821 | int dev_get_alias(const struct net_device *, char *, size_t); |
f629d208 | 3822 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); |
f51048c3 | 3823 | int __dev_set_mtu(struct net_device *, int); |
d836f5c6 ED |
3824 | int dev_validate_mtu(struct net_device *dev, int mtu, |
3825 | struct netlink_ext_ack *extack); | |
7a4c53be SH |
3826 | int dev_set_mtu_ext(struct net_device *dev, int mtu, |
3827 | struct netlink_ext_ack *extack); | |
f629d208 | 3828 | int dev_set_mtu(struct net_device *, int); |
6a643ddb | 3829 | int dev_change_tx_queue_len(struct net_device *, unsigned long); |
f629d208 | 3830 | void dev_set_group(struct net_device *, int); |
d59cdf94 PM |
3831 | int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr, |
3832 | struct netlink_ext_ack *extack); | |
3a37a963 PM |
3833 | int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa, |
3834 | struct netlink_ext_ack *extack); | |
f629d208 JP |
3835 | int dev_change_carrier(struct net_device *, bool new_carrier); |
3836 | int dev_get_phys_port_id(struct net_device *dev, | |
02637fce | 3837 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
3838 | int dev_get_phys_port_name(struct net_device *dev, |
3839 | char *name, size_t len); | |
d6abc596 FF |
3840 | int dev_get_port_parent_id(struct net_device *dev, |
3841 | struct netdev_phys_item_id *ppid, bool recurse); | |
3842 | bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b); | |
d746d707 | 3843 | int dev_change_proto_down(struct net_device *dev, bool proto_down); |
b5899679 | 3844 | int dev_change_proto_down_generic(struct net_device *dev, bool proto_down); |
829eb208 RP |
3845 | void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask, |
3846 | u32 value); | |
f53c7239 | 3847 | struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again); |
ce93718f DM |
3848 | struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
3849 | struct netdev_queue *txq, int *ret); | |
d67b9cd2 | 3850 | |
f4e63525 | 3851 | typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf); |
d67b9cd2 | 3852 | int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack, |
92234c8f | 3853 | int fd, int expected_fd, u32 flags); |
aa8d3a71 | 3854 | int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); |
7f0a8382 | 3855 | u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode); |
aa8d3a71 | 3856 | |
84c6b868 | 3857 | int xdp_umem_query(struct net_device *dev, u16 queue_id); |
d67b9cd2 | 3858 | |
a0265d28 | 3859 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f629d208 | 3860 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f4b05d27 NA |
3861 | bool is_skb_forwardable(const struct net_device *dev, |
3862 | const struct sk_buff *skb); | |
1da177e4 | 3863 | |
4e3264d2 MKL |
3864 | static __always_inline int ____dev_forward_skb(struct net_device *dev, |
3865 | struct sk_buff *skb) | |
3866 | { | |
3867 | if (skb_orphan_frags(skb, GFP_ATOMIC) || | |
3868 | unlikely(!is_skb_forwardable(dev, skb))) { | |
3869 | atomic_long_inc(&dev->rx_dropped); | |
3870 | kfree_skb(skb); | |
3871 | return NET_RX_DROP; | |
3872 | } | |
3873 | ||
3874 | skb_scrub_packet(skb, true); | |
3875 | skb->priority = 0; | |
3876 | return 0; | |
3877 | } | |
3878 | ||
9f9a742d | 3879 | bool dev_nit_active(struct net_device *dev); |
74b20582 DA |
3880 | void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
3881 | ||
20380731 | 3882 | extern int netdev_budget; |
7acf8a1e | 3883 | extern unsigned int netdev_budget_usecs; |
1da177e4 LT |
3884 | |
3885 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 3886 | void netdev_run_todo(void); |
1da177e4 | 3887 | |
bea3348e SH |
3888 | /** |
3889 | * dev_put - release reference to device | |
3890 | * @dev: network device | |
3891 | * | |
9ef4429b | 3892 | * Release reference to device to allow it to be freed. |
bea3348e | 3893 | */ |
1da177e4 LT |
3894 | static inline void dev_put(struct net_device *dev) |
3895 | { | |
933393f5 | 3896 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
3897 | } |
3898 | ||
bea3348e SH |
3899 | /** |
3900 | * dev_hold - get reference to device | |
3901 | * @dev: network device | |
3902 | * | |
9ef4429b | 3903 | * Hold reference to device to keep it from being freed. |
bea3348e | 3904 | */ |
15333061 SH |
3905 | static inline void dev_hold(struct net_device *dev) |
3906 | { | |
933393f5 | 3907 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 3908 | } |
1da177e4 LT |
3909 | |
3910 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
3911 | * and _off may be called from IRQ context, but it is caller | |
3912 | * who is responsible for serialization of these calls. | |
b00055aa SR |
3913 | * |
3914 | * The name carrier is inappropriate, these functions should really be | |
3915 | * called netif_lowerlayer_*() because they represent the state of any | |
3916 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
3917 | */ |
3918 | ||
f629d208 JP |
3919 | void linkwatch_init_dev(struct net_device *dev); |
3920 | void linkwatch_fire_event(struct net_device *dev); | |
3921 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 3922 | |
bea3348e SH |
3923 | /** |
3924 | * netif_carrier_ok - test if carrier present | |
3925 | * @dev: network device | |
3926 | * | |
3927 | * Check if carrier is present on device | |
3928 | */ | |
4d29515f | 3929 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
3930 | { |
3931 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
3932 | } | |
3933 | ||
f629d208 | 3934 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 3935 | |
f629d208 | 3936 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 3937 | |
f629d208 | 3938 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 3939 | |
f629d208 | 3940 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 3941 | |
bea3348e SH |
3942 | /** |
3943 | * netif_dormant_on - mark device as dormant. | |
3944 | * @dev: network device | |
3945 | * | |
3946 | * Mark device as dormant (as per RFC2863). | |
3947 | * | |
3948 | * The dormant state indicates that the relevant interface is not | |
3949 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
3950 | * in a "pending" state, waiting for some external event. For "on- | |
3951 | * demand" interfaces, this new state identifies the situation where the | |
3952 | * interface is waiting for events to place it in the up state. | |
bea3348e | 3953 | */ |
b00055aa SR |
3954 | static inline void netif_dormant_on(struct net_device *dev) |
3955 | { | |
3956 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3957 | linkwatch_fire_event(dev); | |
3958 | } | |
3959 | ||
bea3348e SH |
3960 | /** |
3961 | * netif_dormant_off - set device as not dormant. | |
3962 | * @dev: network device | |
3963 | * | |
3964 | * Device is not in dormant state. | |
3965 | */ | |
b00055aa SR |
3966 | static inline void netif_dormant_off(struct net_device *dev) |
3967 | { | |
3968 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3969 | linkwatch_fire_event(dev); | |
3970 | } | |
3971 | ||
bea3348e | 3972 | /** |
8ecbc40a | 3973 | * netif_dormant - test if device is dormant |
bea3348e SH |
3974 | * @dev: network device |
3975 | * | |
8ecbc40a | 3976 | * Check if device is dormant. |
bea3348e | 3977 | */ |
4d29515f | 3978 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
3979 | { |
3980 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
3981 | } | |
3982 | ||
3983 | ||
eec517cd AL |
3984 | /** |
3985 | * netif_testing_on - mark device as under test. | |
3986 | * @dev: network device | |
3987 | * | |
3988 | * Mark device as under test (as per RFC2863). | |
3989 | * | |
3990 | * The testing state indicates that some test(s) must be performed on | |
3991 | * the interface. After completion, of the test, the interface state | |
3992 | * will change to up, dormant, or down, as appropriate. | |
3993 | */ | |
3994 | static inline void netif_testing_on(struct net_device *dev) | |
3995 | { | |
3996 | if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state)) | |
3997 | linkwatch_fire_event(dev); | |
3998 | } | |
3999 | ||
4000 | /** | |
4001 | * netif_testing_off - set device as not under test. | |
4002 | * @dev: network device | |
4003 | * | |
4004 | * Device is not in testing state. | |
4005 | */ | |
4006 | static inline void netif_testing_off(struct net_device *dev) | |
4007 | { | |
4008 | if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state)) | |
4009 | linkwatch_fire_event(dev); | |
4010 | } | |
4011 | ||
4012 | /** | |
4013 | * netif_testing - test if device is under test | |
4014 | * @dev: network device | |
4015 | * | |
4016 | * Check if device is under test | |
4017 | */ | |
4018 | static inline bool netif_testing(const struct net_device *dev) | |
4019 | { | |
4020 | return test_bit(__LINK_STATE_TESTING, &dev->state); | |
4021 | } | |
4022 | ||
4023 | ||
bea3348e SH |
4024 | /** |
4025 | * netif_oper_up - test if device is operational | |
4026 | * @dev: network device | |
4027 | * | |
4028 | * Check if carrier is operational | |
4029 | */ | |
4d29515f | 4030 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 4031 | { |
b00055aa SR |
4032 | return (dev->operstate == IF_OPER_UP || |
4033 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
4034 | } | |
4035 | ||
bea3348e SH |
4036 | /** |
4037 | * netif_device_present - is device available or removed | |
4038 | * @dev: network device | |
4039 | * | |
4040 | * Check if device has not been removed from system. | |
4041 | */ | |
4d29515f | 4042 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
4043 | { |
4044 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
4045 | } | |
4046 | ||
f629d208 | 4047 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 4048 | |
f629d208 | 4049 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
4050 | |
4051 | /* | |
4052 | * Network interface message level settings | |
4053 | */ | |
1da177e4 LT |
4054 | |
4055 | enum { | |
6a94b8cc MK |
4056 | NETIF_MSG_DRV_BIT, |
4057 | NETIF_MSG_PROBE_BIT, | |
4058 | NETIF_MSG_LINK_BIT, | |
4059 | NETIF_MSG_TIMER_BIT, | |
4060 | NETIF_MSG_IFDOWN_BIT, | |
4061 | NETIF_MSG_IFUP_BIT, | |
4062 | NETIF_MSG_RX_ERR_BIT, | |
4063 | NETIF_MSG_TX_ERR_BIT, | |
4064 | NETIF_MSG_TX_QUEUED_BIT, | |
4065 | NETIF_MSG_INTR_BIT, | |
4066 | NETIF_MSG_TX_DONE_BIT, | |
4067 | NETIF_MSG_RX_STATUS_BIT, | |
4068 | NETIF_MSG_PKTDATA_BIT, | |
4069 | NETIF_MSG_HW_BIT, | |
4070 | NETIF_MSG_WOL_BIT, | |
4071 | ||
4072 | /* When you add a new bit above, update netif_msg_class_names array | |
4073 | * in net/ethtool/common.c | |
4074 | */ | |
4075 | NETIF_MSG_CLASS_COUNT, | |
1da177e4 | 4076 | }; |
6a94b8cc MK |
4077 | /* Both ethtool_ops interface and internal driver implementation use u32 */ |
4078 | static_assert(NETIF_MSG_CLASS_COUNT <= 32); | |
4079 | ||
4080 | #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit)) | |
4081 | #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT) | |
4082 | ||
4083 | #define NETIF_MSG_DRV __NETIF_MSG(DRV) | |
4084 | #define NETIF_MSG_PROBE __NETIF_MSG(PROBE) | |
4085 | #define NETIF_MSG_LINK __NETIF_MSG(LINK) | |
4086 | #define NETIF_MSG_TIMER __NETIF_MSG(TIMER) | |
4087 | #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN) | |
4088 | #define NETIF_MSG_IFUP __NETIF_MSG(IFUP) | |
4089 | #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR) | |
4090 | #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR) | |
4091 | #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED) | |
4092 | #define NETIF_MSG_INTR __NETIF_MSG(INTR) | |
4093 | #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE) | |
4094 | #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS) | |
4095 | #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA) | |
4096 | #define NETIF_MSG_HW __NETIF_MSG(HW) | |
4097 | #define NETIF_MSG_WOL __NETIF_MSG(WOL) | |
1da177e4 LT |
4098 | |
4099 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
4100 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
4101 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
4102 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
4103 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
4104 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
4105 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
4106 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
4107 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
4108 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
4109 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
4110 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
4111 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
4112 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
4113 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
4114 | ||
4115 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
4116 | { | |
4117 | /* use default */ | |
4118 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
4119 | return default_msg_enable_bits; | |
4120 | if (debug_value == 0) /* no output */ | |
4121 | return 0; | |
4122 | /* set low N bits */ | |
f4d7b3e2 | 4123 | return (1U << debug_value) - 1; |
1da177e4 LT |
4124 | } |
4125 | ||
c773e847 | 4126 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 4127 | { |
c773e847 DM |
4128 | spin_lock(&txq->_xmit_lock); |
4129 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
4130 | } |
4131 | ||
5a717f4f MT |
4132 | static inline bool __netif_tx_acquire(struct netdev_queue *txq) |
4133 | { | |
4134 | __acquire(&txq->_xmit_lock); | |
4135 | return true; | |
4136 | } | |
4137 | ||
4138 | static inline void __netif_tx_release(struct netdev_queue *txq) | |
4139 | { | |
4140 | __release(&txq->_xmit_lock); | |
4141 | } | |
4142 | ||
fd2ea0a7 DM |
4143 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
4144 | { | |
4145 | spin_lock_bh(&txq->_xmit_lock); | |
4146 | txq->xmit_lock_owner = smp_processor_id(); | |
4147 | } | |
4148 | ||
4d29515f | 4149 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 4150 | { |
4d29515f | 4151 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
4152 | if (likely(ok)) |
4153 | txq->xmit_lock_owner = smp_processor_id(); | |
4154 | return ok; | |
4155 | } | |
4156 | ||
4157 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
4158 | { | |
4159 | txq->xmit_lock_owner = -1; | |
4160 | spin_unlock(&txq->_xmit_lock); | |
4161 | } | |
4162 | ||
4163 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
4164 | { | |
4165 | txq->xmit_lock_owner = -1; | |
4166 | spin_unlock_bh(&txq->_xmit_lock); | |
4167 | } | |
4168 | ||
08baf561 ED |
4169 | static inline void txq_trans_update(struct netdev_queue *txq) |
4170 | { | |
4171 | if (txq->xmit_lock_owner != -1) | |
4172 | txq->trans_start = jiffies; | |
4173 | } | |
4174 | ||
ba162f8e FW |
4175 | /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */ |
4176 | static inline void netif_trans_update(struct net_device *dev) | |
4177 | { | |
9b36627a FW |
4178 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
4179 | ||
4180 | if (txq->trans_start != jiffies) | |
4181 | txq->trans_start = jiffies; | |
ba162f8e FW |
4182 | } |
4183 | ||
d29f749e DJ |
4184 | /** |
4185 | * netif_tx_lock - grab network device transmit lock | |
4186 | * @dev: network device | |
d29f749e DJ |
4187 | * |
4188 | * Get network device transmit lock | |
4189 | */ | |
22dd7495 JHS |
4190 | static inline void netif_tx_lock(struct net_device *dev) |
4191 | { | |
e8a0464c | 4192 | unsigned int i; |
c3f26a26 | 4193 | int cpu; |
c773e847 | 4194 | |
c3f26a26 DM |
4195 | spin_lock(&dev->tx_global_lock); |
4196 | cpu = smp_processor_id(); | |
e8a0464c DM |
4197 | for (i = 0; i < dev->num_tx_queues; i++) { |
4198 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
4199 | |
4200 | /* We are the only thread of execution doing a | |
4201 | * freeze, but we have to grab the _xmit_lock in | |
4202 | * order to synchronize with threads which are in | |
4203 | * the ->hard_start_xmit() handler and already | |
4204 | * checked the frozen bit. | |
4205 | */ | |
e8a0464c | 4206 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
4207 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
4208 | __netif_tx_unlock(txq); | |
e8a0464c | 4209 | } |
932ff279 HX |
4210 | } |
4211 | ||
4212 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
4213 | { | |
e8a0464c DM |
4214 | local_bh_disable(); |
4215 | netif_tx_lock(dev); | |
932ff279 HX |
4216 | } |
4217 | ||
932ff279 HX |
4218 | static inline void netif_tx_unlock(struct net_device *dev) |
4219 | { | |
e8a0464c DM |
4220 | unsigned int i; |
4221 | ||
4222 | for (i = 0; i < dev->num_tx_queues; i++) { | |
4223 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 4224 | |
c3f26a26 DM |
4225 | /* No need to grab the _xmit_lock here. If the |
4226 | * queue is not stopped for another reason, we | |
4227 | * force a schedule. | |
4228 | */ | |
4229 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 4230 | netif_schedule_queue(txq); |
c3f26a26 DM |
4231 | } |
4232 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
4233 | } |
4234 | ||
4235 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
4236 | { | |
e8a0464c DM |
4237 | netif_tx_unlock(dev); |
4238 | local_bh_enable(); | |
932ff279 HX |
4239 | } |
4240 | ||
c773e847 | 4241 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 4242 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 4243 | __netif_tx_lock(txq, cpu); \ |
5a717f4f MT |
4244 | } else { \ |
4245 | __netif_tx_acquire(txq); \ | |
22dd7495 JHS |
4246 | } \ |
4247 | } | |
4248 | ||
5efeac44 EB |
4249 | #define HARD_TX_TRYLOCK(dev, txq) \ |
4250 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
4251 | __netif_tx_trylock(txq) : \ | |
5a717f4f | 4252 | __netif_tx_acquire(txq)) |
5efeac44 | 4253 | |
c773e847 | 4254 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 4255 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 4256 | __netif_tx_unlock(txq); \ |
5a717f4f MT |
4257 | } else { \ |
4258 | __netif_tx_release(txq); \ | |
22dd7495 JHS |
4259 | } \ |
4260 | } | |
4261 | ||
1da177e4 LT |
4262 | static inline void netif_tx_disable(struct net_device *dev) |
4263 | { | |
fd2ea0a7 | 4264 | unsigned int i; |
c3f26a26 | 4265 | int cpu; |
fd2ea0a7 | 4266 | |
c3f26a26 DM |
4267 | local_bh_disable(); |
4268 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
4269 | for (i = 0; i < dev->num_tx_queues; i++) { |
4270 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
4271 | |
4272 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 4273 | netif_tx_stop_queue(txq); |
c3f26a26 | 4274 | __netif_tx_unlock(txq); |
fd2ea0a7 | 4275 | } |
c3f26a26 | 4276 | local_bh_enable(); |
1da177e4 LT |
4277 | } |
4278 | ||
e308a5d8 DM |
4279 | static inline void netif_addr_lock(struct net_device *dev) |
4280 | { | |
4281 | spin_lock(&dev->addr_list_lock); | |
4282 | } | |
4283 | ||
845e0ebb CW |
4284 | static inline void netif_addr_lock_nested(struct net_device *dev) |
4285 | { | |
4286 | spin_lock_nested(&dev->addr_list_lock, dev->lower_level); | |
4287 | } | |
4288 | ||
e308a5d8 DM |
4289 | static inline void netif_addr_lock_bh(struct net_device *dev) |
4290 | { | |
4291 | spin_lock_bh(&dev->addr_list_lock); | |
4292 | } | |
4293 | ||
4294 | static inline void netif_addr_unlock(struct net_device *dev) | |
4295 | { | |
4296 | spin_unlock(&dev->addr_list_lock); | |
4297 | } | |
4298 | ||
4299 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
4300 | { | |
4301 | spin_unlock_bh(&dev->addr_list_lock); | |
4302 | } | |
4303 | ||
f001fde5 | 4304 | /* |
31278e71 | 4305 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
4306 | * rcu_read_lock held. |
4307 | */ | |
4308 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 4309 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 4310 | |
1da177e4 LT |
4311 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
4312 | ||
f629d208 | 4313 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
4314 | |
4315 | /* Support for loadable net-drivers */ | |
f629d208 | 4316 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
c835a677 | 4317 | unsigned char name_assign_type, |
f629d208 JP |
4318 | void (*setup)(struct net_device *), |
4319 | unsigned int txqs, unsigned int rxqs); | |
c835a677 TG |
4320 | #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ |
4321 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) | |
36909ea4 | 4322 | |
c835a677 TG |
4323 | #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ |
4324 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ | |
4325 | count) | |
36909ea4 | 4326 | |
f629d208 JP |
4327 | int register_netdev(struct net_device *dev); |
4328 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 4329 | |
cd16627f BG |
4330 | int devm_register_netdev(struct device *dev, struct net_device *ndev); |
4331 | ||
22bedad3 | 4332 | /* General hardware address lists handling functions */ |
f629d208 JP |
4333 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
4334 | struct netdev_hw_addr_list *from_list, int addr_len); | |
4335 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
4336 | struct netdev_hw_addr_list *from_list, int addr_len); | |
670e5b8e AD |
4337 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
4338 | struct net_device *dev, | |
4339 | int (*sync)(struct net_device *, const unsigned char *), | |
4340 | int (*unsync)(struct net_device *, | |
4341 | const unsigned char *)); | |
e7946760 IK |
4342 | int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list, |
4343 | struct net_device *dev, | |
4344 | int (*sync)(struct net_device *, | |
4345 | const unsigned char *, int), | |
4346 | int (*unsync)(struct net_device *, | |
4347 | const unsigned char *, int)); | |
4348 | void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list, | |
4349 | struct net_device *dev, | |
4350 | int (*unsync)(struct net_device *, | |
4351 | const unsigned char *, int)); | |
670e5b8e AD |
4352 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, |
4353 | struct net_device *dev, | |
4354 | int (*unsync)(struct net_device *, | |
4355 | const unsigned char *)); | |
f629d208 | 4356 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 4357 | |
f001fde5 | 4358 | /* Functions used for device addresses handling */ |
f629d208 JP |
4359 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
4360 | unsigned char addr_type); | |
4361 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
4362 | unsigned char addr_type); | |
f629d208 JP |
4363 | void dev_addr_flush(struct net_device *dev); |
4364 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
4365 | |
4366 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
4367 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
4368 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
4369 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
4370 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
4371 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
4372 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
4373 | void dev_uc_flush(struct net_device *dev); | |
4374 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 4375 | |
670e5b8e AD |
4376 | /** |
4377 | * __dev_uc_sync - Synchonize device's unicast list | |
4378 | * @dev: device to sync | |
4379 | * @sync: function to call if address should be added | |
4380 | * @unsync: function to call if address should be removed | |
4381 | * | |
4382 | * Add newly added addresses to the interface, and release | |
4383 | * addresses that have been deleted. | |
5e82b4b2 | 4384 | */ |
670e5b8e AD |
4385 | static inline int __dev_uc_sync(struct net_device *dev, |
4386 | int (*sync)(struct net_device *, | |
4387 | const unsigned char *), | |
4388 | int (*unsync)(struct net_device *, | |
4389 | const unsigned char *)) | |
4390 | { | |
4391 | return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); | |
4392 | } | |
4393 | ||
4394 | /** | |
e793c0f7 | 4395 | * __dev_uc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
4396 | * @dev: device to sync |
4397 | * @unsync: function to call if address should be removed | |
4398 | * | |
4399 | * Remove all addresses that were added to the device by dev_uc_sync(). | |
5e82b4b2 | 4400 | */ |
670e5b8e AD |
4401 | static inline void __dev_uc_unsync(struct net_device *dev, |
4402 | int (*unsync)(struct net_device *, | |
4403 | const unsigned char *)) | |
4404 | { | |
4405 | __hw_addr_unsync_dev(&dev->uc, dev, unsync); | |
4406 | } | |
4407 | ||
22bedad3 | 4408 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
4409 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
4410 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
4411 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
4412 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
4413 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
4414 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
4415 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
4416 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
4417 | void dev_mc_flush(struct net_device *dev); | |
4418 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 4419 | |
670e5b8e AD |
4420 | /** |
4421 | * __dev_mc_sync - Synchonize device's multicast list | |
4422 | * @dev: device to sync | |
4423 | * @sync: function to call if address should be added | |
4424 | * @unsync: function to call if address should be removed | |
4425 | * | |
4426 | * Add newly added addresses to the interface, and release | |
4427 | * addresses that have been deleted. | |
5e82b4b2 | 4428 | */ |
670e5b8e AD |
4429 | static inline int __dev_mc_sync(struct net_device *dev, |
4430 | int (*sync)(struct net_device *, | |
4431 | const unsigned char *), | |
4432 | int (*unsync)(struct net_device *, | |
4433 | const unsigned char *)) | |
4434 | { | |
4435 | return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); | |
4436 | } | |
4437 | ||
4438 | /** | |
e793c0f7 | 4439 | * __dev_mc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
4440 | * @dev: device to sync |
4441 | * @unsync: function to call if address should be removed | |
4442 | * | |
4443 | * Remove all addresses that were added to the device by dev_mc_sync(). | |
5e82b4b2 | 4444 | */ |
670e5b8e AD |
4445 | static inline void __dev_mc_unsync(struct net_device *dev, |
4446 | int (*unsync)(struct net_device *, | |
4447 | const unsigned char *)) | |
4448 | { | |
4449 | __hw_addr_unsync_dev(&dev->mc, dev, unsync); | |
4450 | } | |
4451 | ||
4417da66 | 4452 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
4453 | void dev_set_rx_mode(struct net_device *dev); |
4454 | void __dev_set_rx_mode(struct net_device *dev); | |
4455 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
4456 | int dev_set_allmulti(struct net_device *dev, int inc); | |
4457 | void netdev_state_change(struct net_device *dev); | |
4458 | void netdev_notify_peers(struct net_device *dev); | |
4459 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 4460 | /* Load a device via the kmod */ |
f629d208 JP |
4461 | void dev_load(struct net *net, const char *name); |
4462 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
4463 | struct rtnl_link_stats64 *storage); | |
4464 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
4465 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 4466 | |
1da177e4 | 4467 | extern int netdev_max_backlog; |
3b098e2d | 4468 | extern int netdev_tstamp_prequeue; |
1da177e4 | 4469 | extern int weight_p; |
3d48b53f MT |
4470 | extern int dev_weight_rx_bias; |
4471 | extern int dev_weight_tx_bias; | |
4472 | extern int dev_rx_weight; | |
4473 | extern int dev_tx_weight; | |
323ebb61 | 4474 | extern int gro_normal_batch; |
9ff162a8 | 4475 | |
f629d208 | 4476 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
44a40855 VY |
4477 | struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, |
4478 | struct list_head **iter); | |
f629d208 JP |
4479 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
4480 | struct list_head **iter); | |
8b5be856 | 4481 | |
44a40855 VY |
4482 | /* iterate through upper list, must be called under RCU read lock */ |
4483 | #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ | |
4484 | for (iter = &(dev)->adj_list.upper, \ | |
4485 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ | |
4486 | updev; \ | |
4487 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) | |
4488 | ||
1a3f060c DA |
4489 | int netdev_walk_all_upper_dev_rcu(struct net_device *dev, |
4490 | int (*fn)(struct net_device *upper_dev, | |
4491 | void *data), | |
4492 | void *data); | |
4493 | ||
4494 | bool netdev_has_upper_dev_all_rcu(struct net_device *dev, | |
4495 | struct net_device *upper_dev); | |
4496 | ||
25cc72a3 IS |
4497 | bool netdev_has_any_upper_dev(struct net_device *dev); |
4498 | ||
f629d208 JP |
4499 | void *netdev_lower_get_next_private(struct net_device *dev, |
4500 | struct list_head **iter); | |
4501 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
4502 | struct list_head **iter); | |
31088a11 VF |
4503 | |
4504 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
4505 | for (iter = (dev)->adj_list.lower.next, \ | |
4506 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
4507 | priv; \ | |
4508 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
4509 | ||
4510 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
4511 | for (iter = &(dev)->adj_list.lower, \ | |
4512 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
4513 | priv; \ | |
4514 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
4515 | ||
4085ebe8 VY |
4516 | void *netdev_lower_get_next(struct net_device *dev, |
4517 | struct list_head **iter); | |
7ce856aa | 4518 | |
4085ebe8 | 4519 | #define netdev_for_each_lower_dev(dev, ldev, iter) \ |
cfdd28be | 4520 | for (iter = (dev)->adj_list.lower.next, \ |
4085ebe8 VY |
4521 | ldev = netdev_lower_get_next(dev, &(iter)); \ |
4522 | ldev; \ | |
4523 | ldev = netdev_lower_get_next(dev, &(iter))) | |
4524 | ||
7151affe | 4525 | struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev, |
7ce856aa | 4526 | struct list_head **iter); |
1a3f060c DA |
4527 | int netdev_walk_all_lower_dev(struct net_device *dev, |
4528 | int (*fn)(struct net_device *lower_dev, | |
4529 | void *data), | |
4530 | void *data); | |
4531 | int netdev_walk_all_lower_dev_rcu(struct net_device *dev, | |
4532 | int (*fn)(struct net_device *lower_dev, | |
4533 | void *data), | |
4534 | void *data); | |
4535 | ||
f629d208 | 4536 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 4537 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
4538 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
4539 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
42ab19ee DA |
4540 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev, |
4541 | struct netlink_ext_ack *extack); | |
f629d208 | 4542 | int netdev_master_upper_dev_link(struct net_device *dev, |
6dffb044 | 4543 | struct net_device *upper_dev, |
42ab19ee DA |
4544 | void *upper_priv, void *upper_info, |
4545 | struct netlink_ext_ack *extack); | |
f629d208 JP |
4546 | void netdev_upper_dev_unlink(struct net_device *dev, |
4547 | struct net_device *upper_dev); | |
32b6d34f TY |
4548 | int netdev_adjacent_change_prepare(struct net_device *old_dev, |
4549 | struct net_device *new_dev, | |
4550 | struct net_device *dev, | |
4551 | struct netlink_ext_ack *extack); | |
4552 | void netdev_adjacent_change_commit(struct net_device *old_dev, | |
4553 | struct net_device *new_dev, | |
4554 | struct net_device *dev); | |
4555 | void netdev_adjacent_change_abort(struct net_device *old_dev, | |
4556 | struct net_device *new_dev, | |
4557 | struct net_device *dev); | |
5bb025fa | 4558 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
4559 | void *netdev_lower_dev_get_private(struct net_device *dev, |
4560 | struct net_device *lower_dev); | |
04d48266 JP |
4561 | void netdev_lower_state_changed(struct net_device *lower_dev, |
4562 | void *lower_state_info); | |
960fb622 ED |
4563 | |
4564 | /* RSS keys are 40 or 52 bytes long */ | |
4565 | #define NETDEV_RSS_KEY_LEN 52 | |
ba905f5e | 4566 | extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; |
960fb622 ED |
4567 | void netdev_rss_key_fill(void *buffer, size_t len); |
4568 | ||
f629d208 | 4569 | int skb_checksum_help(struct sk_buff *skb); |
b72b5bf6 | 4570 | int skb_crc32c_csum_help(struct sk_buff *skb); |
43c26a1a DC |
4571 | int skb_csum_hwoffload_help(struct sk_buff *skb, |
4572 | const netdev_features_t features); | |
4573 | ||
f629d208 JP |
4574 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, |
4575 | netdev_features_t features, bool tx_path); | |
4576 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
4577 | netdev_features_t features); | |
12b0004d | 4578 | |
61bd3857 MS |
4579 | struct netdev_bonding_info { |
4580 | ifslave slave; | |
4581 | ifbond master; | |
4582 | }; | |
4583 | ||
4584 | struct netdev_notifier_bonding_info { | |
4585 | struct netdev_notifier_info info; /* must be first */ | |
4586 | struct netdev_bonding_info bonding_info; | |
4587 | }; | |
4588 | ||
4589 | void netdev_bonding_info_change(struct net_device *dev, | |
4590 | struct netdev_bonding_info *bonding_info); | |
4591 | ||
6b08d6c1 MK |
4592 | #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK) |
4593 | void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data); | |
4594 | #else | |
4595 | static inline void ethtool_notify(struct net_device *dev, unsigned int cmd, | |
4596 | const void *data) | |
4597 | { | |
4598 | } | |
4599 | #endif | |
4600 | ||
12b0004d CW |
4601 | static inline |
4602 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
4603 | { | |
4604 | return __skb_gso_segment(skb, features, true); | |
4605 | } | |
53d6471c | 4606 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
4607 | |
4608 | static inline bool can_checksum_protocol(netdev_features_t features, | |
4609 | __be16 protocol) | |
4610 | { | |
c8cd0989 TH |
4611 | if (protocol == htons(ETH_P_FCOE)) |
4612 | return !!(features & NETIF_F_FCOE_CRC); | |
4613 | ||
4614 | /* Assume this is an IP checksum (not SCTP CRC) */ | |
4615 | ||
4616 | if (features & NETIF_F_HW_CSUM) { | |
4617 | /* Can checksum everything */ | |
4618 | return true; | |
4619 | } | |
4620 | ||
4621 | switch (protocol) { | |
4622 | case htons(ETH_P_IP): | |
4623 | return !!(features & NETIF_F_IP_CSUM); | |
4624 | case htons(ETH_P_IPV6): | |
4625 | return !!(features & NETIF_F_IPV6_CSUM); | |
4626 | default: | |
4627 | return false; | |
4628 | } | |
ec5f0615 | 4629 | } |
12b0004d | 4630 | |
fb286bb2 | 4631 | #ifdef CONFIG_BUG |
7fe50ac8 | 4632 | void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb); |
fb286bb2 | 4633 | #else |
7fe50ac8 CW |
4634 | static inline void netdev_rx_csum_fault(struct net_device *dev, |
4635 | struct sk_buff *skb) | |
fb286bb2 HX |
4636 | { |
4637 | } | |
4638 | #endif | |
1da177e4 | 4639 | /* rx skb timestamps */ |
f629d208 JP |
4640 | void net_enable_timestamp(void); |
4641 | void net_disable_timestamp(void); | |
1da177e4 | 4642 | |
20380731 | 4643 | #ifdef CONFIG_PROC_FS |
f629d208 | 4644 | int __init dev_proc_init(void); |
900ff8c6 CW |
4645 | #else |
4646 | #define dev_proc_init() 0 | |
20380731 ACM |
4647 | #endif |
4648 | ||
4798248e | 4649 | static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, |
fa2dbdc2 DM |
4650 | struct sk_buff *skb, struct net_device *dev, |
4651 | bool more) | |
4798248e | 4652 | { |
6b16f9ee | 4653 | __this_cpu_write(softnet_data.xmit.more, more); |
0b725a2c | 4654 | return ops->ndo_start_xmit(skb, dev); |
4798248e DM |
4655 | } |
4656 | ||
97cdcf37 FW |
4657 | static inline bool netdev_xmit_more(void) |
4658 | { | |
4659 | return __this_cpu_read(softnet_data.xmit.more); | |
4660 | } | |
4661 | ||
10b3ad8c | 4662 | static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, |
fa2dbdc2 | 4663 | struct netdev_queue *txq, bool more) |
4798248e DM |
4664 | { |
4665 | const struct net_device_ops *ops = dev->netdev_ops; | |
2183435c | 4666 | netdev_tx_t rc; |
4798248e | 4667 | |
fa2dbdc2 | 4668 | rc = __netdev_start_xmit(ops, skb, dev, more); |
10b3ad8c DM |
4669 | if (rc == NETDEV_TX_OK) |
4670 | txq_trans_update(txq); | |
4671 | ||
4672 | return rc; | |
4798248e DM |
4673 | } |
4674 | ||
b793dc5c | 4675 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
42a2d923 | 4676 | const void *ns); |
b793dc5c | 4677 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
42a2d923 | 4678 | const void *ns); |
58292cbe | 4679 | |
737aec57 | 4680 | extern const struct kobj_ns_type_operations net_ns_type_operations; |
04600794 | 4681 | |
f629d208 | 4682 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 4683 | |
f629d208 | 4684 | void linkwatch_run_queue(void); |
20380731 | 4685 | |
da08143b MK |
4686 | static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, |
4687 | netdev_features_t f2) | |
4688 | { | |
c8cd0989 TH |
4689 | if ((f1 ^ f2) & NETIF_F_HW_CSUM) { |
4690 | if (f1 & NETIF_F_HW_CSUM) | |
b6a0e72a | 4691 | f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 4692 | else |
b6a0e72a | 4693 | f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 4694 | } |
da08143b | 4695 | |
c8cd0989 | 4696 | return f1 & f2; |
da08143b MK |
4697 | } |
4698 | ||
c8f44aff MM |
4699 | static inline netdev_features_t netdev_get_wanted_features( |
4700 | struct net_device *dev) | |
5455c699 MM |
4701 | { |
4702 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
4703 | } | |
c8f44aff MM |
4704 | netdev_features_t netdev_increment_features(netdev_features_t all, |
4705 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
4706 | |
4707 | /* Allow TSO being used on stacked device : | |
4708 | * Performing the GSO segmentation before last device | |
4709 | * is a performance improvement. | |
4710 | */ | |
4711 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
4712 | netdev_features_t mask) | |
4713 | { | |
4714 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
4715 | } | |
4716 | ||
6cb6a27c | 4717 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 4718 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 4719 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 4720 | |
fc4a7489 PM |
4721 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
4722 | struct net_device *dev); | |
4723 | ||
e38f3025 TM |
4724 | netdev_features_t passthru_features_check(struct sk_buff *skb, |
4725 | struct net_device *dev, | |
4726 | netdev_features_t features); | |
c1e756bf | 4727 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 4728 | |
4d29515f | 4729 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 4730 | { |
7b748340 | 4731 | netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
4732 | |
4733 | /* check flags correspondence */ | |
4734 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
0345e186 MM |
4735 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); |
4736 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
cbc53e08 | 4737 | BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT)); |
0345e186 MM |
4738 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
4739 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4740 | BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); |
4741 | BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); | |
7e13318d TH |
4742 | BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT)); |
4743 | BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4744 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); |
4745 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); | |
802ab55a | 4746 | BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT)); |
e585f236 | 4747 | BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); |
90017acc | 4748 | BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT)); |
c7ef8f0c | 4749 | BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT)); |
0c19f846 | 4750 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT)); |
83aa025f | 4751 | BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT)); |
3b335832 | 4752 | BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT)); |
0345e186 | 4753 | |
d6b4991a | 4754 | return (features & feature) == feature; |
576a30eb HX |
4755 | } |
4756 | ||
4d29515f | 4757 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 4758 | { |
278b2513 | 4759 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 4760 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
4761 | } |
4762 | ||
8b86a61d | 4763 | static inline bool netif_needs_gso(struct sk_buff *skb, |
4d29515f | 4764 | netdev_features_t features) |
7967168c | 4765 | { |
fc741216 | 4766 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
4767 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
4768 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
4769 | } |
4770 | ||
82cc1a7a PWJ |
4771 | static inline void netif_set_gso_max_size(struct net_device *dev, |
4772 | unsigned int size) | |
4773 | { | |
4774 | dev->gso_max_size = size; | |
4775 | } | |
4776 | ||
7a7ffbab WCC |
4777 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
4778 | int pulled_hlen, u16 mac_offset, | |
4779 | int mac_len) | |
4780 | { | |
4781 | skb->protocol = protocol; | |
4782 | skb->encapsulation = 1; | |
4783 | skb_push(skb, pulled_hlen); | |
4784 | skb_reset_transport_header(skb); | |
4785 | skb->mac_header = mac_offset; | |
4786 | skb->network_header = skb->mac_header + mac_len; | |
4787 | skb->mac_len = mac_len; | |
4788 | } | |
4789 | ||
3c175784 SD |
4790 | static inline bool netif_is_macsec(const struct net_device *dev) |
4791 | { | |
4792 | return dev->priv_flags & IFF_MACSEC; | |
4793 | } | |
4794 | ||
b618aaa9 | 4795 | static inline bool netif_is_macvlan(const struct net_device *dev) |
a6cc0cfa JF |
4796 | { |
4797 | return dev->priv_flags & IFF_MACVLAN; | |
4798 | } | |
4799 | ||
b618aaa9 | 4800 | static inline bool netif_is_macvlan_port(const struct net_device *dev) |
2f33e7d5 MB |
4801 | { |
4802 | return dev->priv_flags & IFF_MACVLAN_PORT; | |
4803 | } | |
4804 | ||
b618aaa9 | 4805 | static inline bool netif_is_bond_master(const struct net_device *dev) |
8a7fbfab | 4806 | { |
4807 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
4808 | } | |
4809 | ||
b618aaa9 | 4810 | static inline bool netif_is_bond_slave(const struct net_device *dev) |
1765a575 JP |
4811 | { |
4812 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
4813 | } | |
4814 | ||
3bdc0eba BG |
4815 | static inline bool netif_supports_nofcs(struct net_device *dev) |
4816 | { | |
4817 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
4818 | } | |
4819 | ||
d5256083 DB |
4820 | static inline bool netif_has_l3_rx_handler(const struct net_device *dev) |
4821 | { | |
4822 | return dev->priv_flags & IFF_L3MDEV_RX_HANDLER; | |
4823 | } | |
4824 | ||
007979ea | 4825 | static inline bool netif_is_l3_master(const struct net_device *dev) |
4e3c8992 | 4826 | { |
007979ea | 4827 | return dev->priv_flags & IFF_L3MDEV_MASTER; |
4e3c8992 DA |
4828 | } |
4829 | ||
fee6d4c7 DA |
4830 | static inline bool netif_is_l3_slave(const struct net_device *dev) |
4831 | { | |
4832 | return dev->priv_flags & IFF_L3MDEV_SLAVE; | |
4833 | } | |
4834 | ||
0894ae3f JP |
4835 | static inline bool netif_is_bridge_master(const struct net_device *dev) |
4836 | { | |
4837 | return dev->priv_flags & IFF_EBRIDGE; | |
4838 | } | |
4839 | ||
28f9ee22 VY |
4840 | static inline bool netif_is_bridge_port(const struct net_device *dev) |
4841 | { | |
4842 | return dev->priv_flags & IFF_BRIDGE_PORT; | |
4843 | } | |
4844 | ||
35d4e172 JP |
4845 | static inline bool netif_is_ovs_master(const struct net_device *dev) |
4846 | { | |
4847 | return dev->priv_flags & IFF_OPENVSWITCH; | |
4848 | } | |
4849 | ||
5be66141 JP |
4850 | static inline bool netif_is_ovs_port(const struct net_device *dev) |
4851 | { | |
4852 | return dev->priv_flags & IFF_OVS_DATAPATH; | |
4853 | } | |
4854 | ||
df23bb18 SB |
4855 | static inline bool netif_is_any_bridge_port(const struct net_device *dev) |
4856 | { | |
4857 | return netif_is_bridge_port(dev) || netif_is_ovs_port(dev); | |
4858 | } | |
4859 | ||
b618aaa9 | 4860 | static inline bool netif_is_team_master(const struct net_device *dev) |
c981e421 JP |
4861 | { |
4862 | return dev->priv_flags & IFF_TEAM; | |
4863 | } | |
4864 | ||
b618aaa9 | 4865 | static inline bool netif_is_team_port(const struct net_device *dev) |
f7f019ee JP |
4866 | { |
4867 | return dev->priv_flags & IFF_TEAM_PORT; | |
4868 | } | |
4869 | ||
b618aaa9 | 4870 | static inline bool netif_is_lag_master(const struct net_device *dev) |
7be61833 JP |
4871 | { |
4872 | return netif_is_bond_master(dev) || netif_is_team_master(dev); | |
4873 | } | |
4874 | ||
b618aaa9 | 4875 | static inline bool netif_is_lag_port(const struct net_device *dev) |
e0ba1414 JP |
4876 | { |
4877 | return netif_is_bond_slave(dev) || netif_is_team_port(dev); | |
4878 | } | |
4879 | ||
d4ab4286 KJ |
4880 | static inline bool netif_is_rxfh_configured(const struct net_device *dev) |
4881 | { | |
4882 | return dev->priv_flags & IFF_RXFH_CONFIGURED; | |
4883 | } | |
4884 | ||
30c8bd5a SS |
4885 | static inline bool netif_is_failover(const struct net_device *dev) |
4886 | { | |
4887 | return dev->priv_flags & IFF_FAILOVER; | |
4888 | } | |
4889 | ||
4890 | static inline bool netif_is_failover_slave(const struct net_device *dev) | |
4891 | { | |
4892 | return dev->priv_flags & IFF_FAILOVER_SLAVE; | |
4893 | } | |
4894 | ||
02875878 ED |
4895 | /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ |
4896 | static inline void netif_keep_dst(struct net_device *dev) | |
4897 | { | |
4898 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM); | |
4899 | } | |
4900 | ||
18d3df3e PA |
4901 | /* return true if dev can't cope with mtu frames that need vlan tag insertion */ |
4902 | static inline bool netif_reduces_vlan_mtu(struct net_device *dev) | |
4903 | { | |
4904 | /* TODO: reserve and use an additional IFF bit, if we get more users */ | |
4905 | return dev->priv_flags & IFF_MACSEC; | |
4906 | } | |
4907 | ||
505d4f73 | 4908 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 4909 | |
571ba423 JP |
4910 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
4911 | ||
4912 | /* netdev_printk helpers, similar to dev_printk */ | |
4913 | ||
4914 | static inline const char *netdev_name(const struct net_device *dev) | |
4915 | { | |
c6f854d5 VF |
4916 | if (!dev->name[0] || strchr(dev->name, '%')) |
4917 | return "(unnamed net_device)"; | |
571ba423 JP |
4918 | return dev->name; |
4919 | } | |
4920 | ||
8397ed36 DA |
4921 | static inline bool netdev_unregistering(const struct net_device *dev) |
4922 | { | |
4923 | return dev->reg_state == NETREG_UNREGISTERING; | |
4924 | } | |
4925 | ||
ccc7f496 VF |
4926 | static inline const char *netdev_reg_state(const struct net_device *dev) |
4927 | { | |
4928 | switch (dev->reg_state) { | |
4929 | case NETREG_UNINITIALIZED: return " (uninitialized)"; | |
4930 | case NETREG_REGISTERED: return ""; | |
4931 | case NETREG_UNREGISTERING: return " (unregistering)"; | |
4932 | case NETREG_UNREGISTERED: return " (unregistered)"; | |
4933 | case NETREG_RELEASED: return " (released)"; | |
4934 | case NETREG_DUMMY: return " (dummy)"; | |
4935 | } | |
4936 | ||
4937 | WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state); | |
4938 | return " (unknown)"; | |
4939 | } | |
4940 | ||
ce3fdb69 | 4941 | __printf(3, 4) __cold |
6ea754eb JP |
4942 | void netdev_printk(const char *level, const struct net_device *dev, |
4943 | const char *format, ...); | |
ce3fdb69 | 4944 | __printf(2, 3) __cold |
6ea754eb | 4945 | void netdev_emerg(const struct net_device *dev, const char *format, ...); |
ce3fdb69 | 4946 | __printf(2, 3) __cold |
6ea754eb | 4947 | void netdev_alert(const struct net_device *dev, const char *format, ...); |
ce3fdb69 | 4948 | __printf(2, 3) __cold |
6ea754eb | 4949 | void netdev_crit(const struct net_device *dev, const char *format, ...); |
ce3fdb69 | 4950 | __printf(2, 3) __cold |
6ea754eb | 4951 | void netdev_err(const struct net_device *dev, const char *format, ...); |
ce3fdb69 | 4952 | __printf(2, 3) __cold |
6ea754eb | 4953 | void netdev_warn(const struct net_device *dev, const char *format, ...); |
ce3fdb69 | 4954 | __printf(2, 3) __cold |
6ea754eb | 4955 | void netdev_notice(const struct net_device *dev, const char *format, ...); |
ce3fdb69 | 4956 | __printf(2, 3) __cold |
6ea754eb | 4957 | void netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 4958 | |
375ef2b1 GP |
4959 | #define netdev_level_once(level, dev, fmt, ...) \ |
4960 | do { \ | |
4961 | static bool __print_once __read_mostly; \ | |
4962 | \ | |
4963 | if (!__print_once) { \ | |
4964 | __print_once = true; \ | |
4965 | netdev_printk(level, dev, fmt, ##__VA_ARGS__); \ | |
4966 | } \ | |
4967 | } while (0) | |
4968 | ||
4969 | #define netdev_emerg_once(dev, fmt, ...) \ | |
4970 | netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__) | |
4971 | #define netdev_alert_once(dev, fmt, ...) \ | |
4972 | netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__) | |
4973 | #define netdev_crit_once(dev, fmt, ...) \ | |
4974 | netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__) | |
4975 | #define netdev_err_once(dev, fmt, ...) \ | |
4976 | netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__) | |
4977 | #define netdev_warn_once(dev, fmt, ...) \ | |
4978 | netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__) | |
4979 | #define netdev_notice_once(dev, fmt, ...) \ | |
4980 | netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__) | |
4981 | #define netdev_info_once(dev, fmt, ...) \ | |
4982 | netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__) | |
4983 | ||
8909c9ad VK |
4984 | #define MODULE_ALIAS_NETDEV(device) \ |
4985 | MODULE_ALIAS("netdev-" device) | |
4986 | ||
ceabef7d OZ |
4987 | #if defined(CONFIG_DYNAMIC_DEBUG) || \ |
4988 | (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) | |
571ba423 JP |
4989 | #define netdev_dbg(__dev, format, args...) \ |
4990 | do { \ | |
ffa10cb4 | 4991 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 4992 | } while (0) |
b558c96f JC |
4993 | #elif defined(DEBUG) |
4994 | #define netdev_dbg(__dev, format, args...) \ | |
4995 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
4996 | #else |
4997 | #define netdev_dbg(__dev, format, args...) \ | |
4998 | ({ \ | |
4999 | if (0) \ | |
5000 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
571ba423 JP |
5001 | }) |
5002 | #endif | |
5003 | ||
5004 | #if defined(VERBOSE_DEBUG) | |
5005 | #define netdev_vdbg netdev_dbg | |
5006 | #else | |
5007 | ||
5008 | #define netdev_vdbg(dev, format, args...) \ | |
5009 | ({ \ | |
5010 | if (0) \ | |
5011 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
5012 | 0; \ | |
5013 | }) | |
5014 | #endif | |
5015 | ||
5016 | /* | |
5017 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
5018 | * of using a WARN/WARN_ON to get the message out, including the | |
5019 | * file/line information and a backtrace. | |
5020 | */ | |
5021 | #define netdev_WARN(dev, format, args...) \ | |
e1cfe3d0 | 5022 | WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \ |
ccc7f496 | 5023 | netdev_reg_state(dev), ##args) |
571ba423 | 5024 | |
72dd831e | 5025 | #define netdev_WARN_ONCE(dev, format, args...) \ |
e1cfe3d0 | 5026 | WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \ |
375ef2b1 GP |
5027 | netdev_reg_state(dev), ##args) |
5028 | ||
b3d95c5c JP |
5029 | /* netif printk helpers, similar to netdev_printk */ |
5030 | ||
5031 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
5032 | do { \ | |
5033 | if (netif_msg_##type(priv)) \ | |
5034 | netdev_printk(level, (dev), fmt, ##args); \ | |
5035 | } while (0) | |
5036 | ||
f45f4321 JP |
5037 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
5038 | do { \ | |
5039 | if (netif_msg_##type(priv)) \ | |
5040 | netdev_##level(dev, fmt, ##args); \ | |
5041 | } while (0) | |
5042 | ||
b3d95c5c | 5043 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 5044 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 5045 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 5046 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 5047 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 5048 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 5049 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 5050 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 5051 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 5052 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 5053 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 5054 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 5055 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 5056 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 5057 | |
ceabef7d OZ |
5058 | #if defined(CONFIG_DYNAMIC_DEBUG) || \ |
5059 | (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) | |
b3d95c5c JP |
5060 | #define netif_dbg(priv, type, netdev, format, args...) \ |
5061 | do { \ | |
5062 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 5063 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 5064 | } while (0) |
0053ea9c JP |
5065 | #elif defined(DEBUG) |
5066 | #define netif_dbg(priv, type, dev, format, args...) \ | |
5067 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
5068 | #else |
5069 | #define netif_dbg(priv, type, dev, format, args...) \ | |
5070 | ({ \ | |
5071 | if (0) \ | |
5072 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
5073 | 0; \ | |
5074 | }) | |
5075 | #endif | |
5076 | ||
f617f276 EC |
5077 | /* if @cond then downgrade to debug, else print at @level */ |
5078 | #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \ | |
5079 | do { \ | |
5080 | if (cond) \ | |
5081 | netif_dbg(priv, type, netdev, fmt, ##args); \ | |
5082 | else \ | |
5083 | netif_ ## level(priv, type, netdev, fmt, ##args); \ | |
5084 | } while (0) | |
5085 | ||
b3d95c5c | 5086 | #if defined(VERBOSE_DEBUG) |
bcfcc450 | 5087 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
5088 | #else |
5089 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
5090 | ({ \ | |
5091 | if (0) \ | |
a4ed89cb | 5092 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
5093 | 0; \ |
5094 | }) | |
5095 | #endif | |
571ba423 | 5096 | |
900ff8c6 CW |
5097 | /* |
5098 | * The list of packet types we will receive (as opposed to discard) | |
5099 | * and the routines to invoke. | |
5100 | * | |
5101 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
5102 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
5103 | * | |
900ff8c6 | 5104 | * 0800 IP |
900ff8c6 CW |
5105 | * 0001 802.3 |
5106 | * 0002 AX.25 | |
5107 | * 0004 802.2 | |
5108 | * 8035 RARP | |
5109 | * 0005 SNAP | |
5110 | * 0805 X.25 | |
5111 | * 0806 ARP | |
5112 | * 8137 IPX | |
5113 | * 0009 Localtalk | |
5114 | * 86DD IPv6 | |
5115 | */ | |
5116 | #define PTYPE_HASH_SIZE (16) | |
5117 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
5118 | ||
4de83b88 MB |
5119 | extern struct net_device *blackhole_netdev; |
5120 | ||
385a154c | 5121 | #endif /* _LINUX_NETDEVICE_H */ |