2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31 #include <linux/if_link.h>
34 #include <linux/pm_qos_params.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
38 #include <asm/atomic.h>
39 #include <asm/cache.h>
40 #include <asm/byteorder.h>
42 #include <linux/device.h>
43 #include <linux/percpu.h>
44 #include <linux/rculist.h>
45 #include <linux/dmaengine.h>
46 #include <linux/workqueue.h>
48 #include <linux/ethtool.h>
49 #include <net/net_namespace.h>
52 #include <net/dcbnl.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
64 functions are available. */
65 #define HAVE_FREE_NETDEV /* free_netdev() */
66 #define HAVE_NETDEV_PRIV /* netdev_priv() */
68 /* Backlog congestion levels */
69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70 #define NET_RX_DROP 1 /* packet dropped */
73 * Transmit return codes: transmit return codes originate from three different
76 * - qdisc return codes
77 * - driver transmit return codes
80 * Drivers are allowed to return any one of those in their hard_start_xmit()
81 * function. Real network devices commonly used with qdiscs should only return
82 * the driver transmit return codes though - when qdiscs are used, the actual
83 * transmission happens asynchronously, so the value is not propagated to
84 * higher layers. Virtual network devices transmit synchronously, in this case
85 * the driver transmit return codes are consumed by dev_queue_xmit(), all
86 * others are propagated to higher layers.
89 /* qdisc ->enqueue() return codes. */
90 #define NET_XMIT_SUCCESS 0x00
91 #define NET_XMIT_DROP 0x01 /* skb dropped */
92 #define NET_XMIT_CN 0x02 /* congestion notification */
93 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
94 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
96 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
97 * indicates that the device will soon be dropping packets, or already drops
98 * some packets of the same priority; prompting us to send less aggressively. */
99 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
100 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
102 /* Driver transmit return codes */
103 #define NETDEV_TX_MASK 0xf0
106 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
107 NETDEV_TX_OK = 0x00, /* driver took care of packet */
108 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
109 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
111 typedef enum netdev_tx netdev_tx_t;
114 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
115 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
117 static inline bool dev_xmit_complete(int rc)
120 * Positive cases with an skb consumed by a driver:
121 * - successful transmission (rc == NETDEV_TX_OK)
122 * - error while transmitting (rc < 0)
123 * - error while queueing to a different device (rc & NET_XMIT_MASK)
125 if (likely(rc < NET_XMIT_MASK))
133 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
147 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
148 # define LL_MAX_HEADER 48
150 # define LL_MAX_HEADER 32
153 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
154 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
155 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
156 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
157 #define MAX_HEADER LL_MAX_HEADER
159 #define MAX_HEADER (LL_MAX_HEADER + 48)
162 #endif /* __KERNEL__ */
165 * Network device statistics. Akin to the 2.0 ether stats but
166 * with byte counters.
169 struct net_device_stats {
170 unsigned long rx_packets; /* total packets received */
171 unsigned long tx_packets; /* total packets transmitted */
172 unsigned long rx_bytes; /* total bytes received */
173 unsigned long tx_bytes; /* total bytes transmitted */
174 unsigned long rx_errors; /* bad packets received */
175 unsigned long tx_errors; /* packet transmit problems */
176 unsigned long rx_dropped; /* no space in linux buffers */
177 unsigned long tx_dropped; /* no space available in linux */
178 unsigned long multicast; /* multicast packets received */
179 unsigned long collisions;
181 /* detailed rx_errors: */
182 unsigned long rx_length_errors;
183 unsigned long rx_over_errors; /* receiver ring buff overflow */
184 unsigned long rx_crc_errors; /* recved pkt with crc error */
185 unsigned long rx_frame_errors; /* recv'd frame alignment error */
186 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
187 unsigned long rx_missed_errors; /* receiver missed packet */
189 /* detailed tx_errors */
190 unsigned long tx_aborted_errors;
191 unsigned long tx_carrier_errors;
192 unsigned long tx_fifo_errors;
193 unsigned long tx_heartbeat_errors;
194 unsigned long tx_window_errors;
197 unsigned long rx_compressed;
198 unsigned long tx_compressed;
202 /* Media selection options. */
215 #include <linux/cache.h>
216 #include <linux/skbuff.h>
222 struct netdev_hw_addr {
223 struct list_head list;
224 unsigned char addr[MAX_ADDR_LEN];
226 #define NETDEV_HW_ADDR_T_LAN 1
227 #define NETDEV_HW_ADDR_T_SAN 2
228 #define NETDEV_HW_ADDR_T_SLAVE 3
229 #define NETDEV_HW_ADDR_T_UNICAST 4
230 #define NETDEV_HW_ADDR_T_MULTICAST 5
234 struct rcu_head rcu_head;
237 struct netdev_hw_addr_list {
238 struct list_head list;
242 #define netdev_hw_addr_list_count(l) ((l)->count)
243 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
244 #define netdev_hw_addr_list_for_each(ha, l) \
245 list_for_each_entry(ha, &(l)->list, list)
247 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
248 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
249 #define netdev_for_each_uc_addr(ha, dev) \
250 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
252 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
253 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
254 #define netdev_for_each_mc_addr(ha, dev) \
255 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
258 struct hh_cache *hh_next; /* Next entry */
259 atomic_t hh_refcnt; /* number of users */
261 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
263 * They are mostly read, but hh_refcnt may be changed quite frequently,
264 * incurring cache line ping pongs.
266 __be16 hh_type ____cacheline_aligned_in_smp;
267 /* protocol identifier, f.e ETH_P_IP
268 * NOTE: For VLANs, this will be the
269 * encapuslated type. --BLG
271 u16 hh_len; /* length of header */
272 int (*hh_output)(struct sk_buff *skb);
275 /* cached hardware header; allow for machine alignment needs. */
276 #define HH_DATA_MOD 16
277 #define HH_DATA_OFF(__len) \
278 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
279 #define HH_DATA_ALIGN(__len) \
280 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
281 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
284 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
286 * dev->hard_header_len ? (dev->hard_header_len +
287 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
289 * We could use other alignment values, but we must maintain the
290 * relationship HH alignment <= LL alignment.
292 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
295 #define LL_RESERVED_SPACE(dev) \
296 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
297 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
298 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
299 #define LL_ALLOCATED_SPACE(dev) \
300 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 int (*create) (struct sk_buff *skb, struct net_device *dev,
304 unsigned short type, const void *daddr,
305 const void *saddr, unsigned len);
306 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
307 int (*rebuild)(struct sk_buff *skb);
308 #define HAVE_HEADER_CACHE
309 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
310 void (*cache_update)(struct hh_cache *hh,
311 const struct net_device *dev,
312 const unsigned char *haddr);
315 /* These flag bits are private to the generic network queueing
316 * layer, they may not be explicitly referenced by any other
320 enum netdev_state_t {
322 __LINK_STATE_PRESENT,
323 __LINK_STATE_NOCARRIER,
324 __LINK_STATE_LINKWATCH_PENDING,
325 __LINK_STATE_DORMANT,
330 * This structure holds at boot time configured netdevice settings. They
331 * are then used in the device probing.
333 struct netdev_boot_setup {
337 #define NETDEV_BOOT_SETUP_MAX 8
339 extern int __init netdev_boot_setup(char *str);
342 * Structure for NAPI scheduling similar to tasklet but with weighting
345 /* The poll_list must only be managed by the entity which
346 * changes the state of the NAPI_STATE_SCHED bit. This means
347 * whoever atomically sets that bit can add this napi_struct
348 * to the per-cpu poll_list, and whoever clears that bit
349 * can remove from the list right before clearing the bit.
351 struct list_head poll_list;
355 int (*poll)(struct napi_struct *, int);
356 #ifdef CONFIG_NETPOLL
357 spinlock_t poll_lock;
361 unsigned int gro_count;
363 struct net_device *dev;
364 struct list_head dev_list;
365 struct sk_buff *gro_list;
370 NAPI_STATE_SCHED, /* Poll is scheduled */
371 NAPI_STATE_DISABLE, /* Disable pending */
372 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
382 typedef enum gro_result gro_result_t;
384 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
386 extern void __napi_schedule(struct napi_struct *n);
388 static inline int napi_disable_pending(struct napi_struct *n)
390 return test_bit(NAPI_STATE_DISABLE, &n->state);
394 * napi_schedule_prep - check if napi can be scheduled
397 * Test if NAPI routine is already running, and if not mark
398 * it as running. This is used as a condition variable
399 * insure only one NAPI poll instance runs. We also make
400 * sure there is no pending NAPI disable.
402 static inline int napi_schedule_prep(struct napi_struct *n)
404 return !napi_disable_pending(n) &&
405 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
409 * napi_schedule - schedule NAPI poll
412 * Schedule NAPI poll routine to be called if it is not already
415 static inline void napi_schedule(struct napi_struct *n)
417 if (napi_schedule_prep(n))
421 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
422 static inline int napi_reschedule(struct napi_struct *napi)
424 if (napi_schedule_prep(napi)) {
425 __napi_schedule(napi);
432 * napi_complete - NAPI processing complete
435 * Mark NAPI processing as complete.
437 extern void __napi_complete(struct napi_struct *n);
438 extern void napi_complete(struct napi_struct *n);
441 * napi_disable - prevent NAPI from scheduling
444 * Stop NAPI from being scheduled on this context.
445 * Waits till any outstanding processing completes.
447 static inline void napi_disable(struct napi_struct *n)
449 set_bit(NAPI_STATE_DISABLE, &n->state);
450 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
452 clear_bit(NAPI_STATE_DISABLE, &n->state);
456 * napi_enable - enable NAPI scheduling
459 * Resume NAPI from being scheduled on this context.
460 * Must be paired with napi_disable.
462 static inline void napi_enable(struct napi_struct *n)
464 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
465 smp_mb__before_clear_bit();
466 clear_bit(NAPI_STATE_SCHED, &n->state);
471 * napi_synchronize - wait until NAPI is not running
474 * Wait until NAPI is done being scheduled on this context.
475 * Waits till any outstanding processing completes but
476 * does not disable future activations.
478 static inline void napi_synchronize(const struct napi_struct *n)
480 while (test_bit(NAPI_STATE_SCHED, &n->state))
484 # define napi_synchronize(n) barrier()
487 enum netdev_queue_state_t {
489 __QUEUE_STATE_FROZEN,
492 struct netdev_queue {
496 struct net_device *dev;
499 struct Qdisc *qdisc_sleeping;
503 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
506 * please use this field instead of dev->trans_start
508 unsigned long trans_start;
509 unsigned long tx_bytes;
510 unsigned long tx_packets;
511 unsigned long tx_dropped;
512 } ____cacheline_aligned_in_smp;
516 * This structure holds an RPS map which can be of variable length. The
517 * map is an array of CPUs.
524 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
527 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
528 * tail pointer for that CPU's input queue at the time of last enqueue.
530 struct rps_dev_flow {
533 unsigned int last_qtail;
537 * The rps_dev_flow_table structure contains a table of flow mappings.
539 struct rps_dev_flow_table {
542 struct work_struct free_work;
543 struct rps_dev_flow flows[0];
545 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
546 (_num * sizeof(struct rps_dev_flow)))
549 * The rps_sock_flow_table contains mappings of flows to the last CPU
550 * on which they were processed by the application (set in recvmsg).
552 struct rps_sock_flow_table {
556 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
557 (_num * sizeof(u16)))
559 #define RPS_NO_CPU 0xffff
561 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
565 unsigned int cpu, index = hash & table->mask;
567 /* We only give a hint, preemption can change cpu under us */
568 cpu = raw_smp_processor_id();
570 if (table->ents[index] != cpu)
571 table->ents[index] = cpu;
575 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
579 table->ents[hash & table->mask] = RPS_NO_CPU;
582 extern struct rps_sock_flow_table *rps_sock_flow_table;
584 /* This structure contains an instance of an RX queue. */
585 struct netdev_rx_queue {
586 struct rps_map *rps_map;
587 struct rps_dev_flow_table *rps_flow_table;
589 struct netdev_rx_queue *first;
591 } ____cacheline_aligned_in_smp;
592 #endif /* CONFIG_RPS */
595 * This structure defines the management hooks for network devices.
596 * The following hooks can be defined; unless noted otherwise, they are
597 * optional and can be filled with a null pointer.
599 * int (*ndo_init)(struct net_device *dev);
600 * This function is called once when network device is registered.
601 * The network device can use this to any late stage initializaton
602 * or semantic validattion. It can fail with an error code which will
603 * be propogated back to register_netdev
605 * void (*ndo_uninit)(struct net_device *dev);
606 * This function is called when device is unregistered or when registration
607 * fails. It is not called if init fails.
609 * int (*ndo_open)(struct net_device *dev);
610 * This function is called when network device transistions to the up
613 * int (*ndo_stop)(struct net_device *dev);
614 * This function is called when network device transistions to the down
617 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
618 * struct net_device *dev);
619 * Called when a packet needs to be transmitted.
620 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
621 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
622 * Required can not be NULL.
624 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
625 * Called to decide which queue to when device supports multiple
628 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
629 * This function is called to allow device receiver to make
630 * changes to configuration when multicast or promiscious is enabled.
632 * void (*ndo_set_rx_mode)(struct net_device *dev);
633 * This function is called device changes address list filtering.
635 * void (*ndo_set_multicast_list)(struct net_device *dev);
636 * This function is called when the multicast address list changes.
638 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
639 * This function is called when the Media Access Control address
640 * needs to be changed. If this interface is not defined, the
641 * mac address can not be changed.
643 * int (*ndo_validate_addr)(struct net_device *dev);
644 * Test if Media Access Control address is valid for the device.
646 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
647 * Called when a user request an ioctl which can't be handled by
648 * the generic interface code. If not defined ioctl's return
649 * not supported error code.
651 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
652 * Used to set network devices bus interface parameters. This interface
653 * is retained for legacy reason, new devices should use the bus
654 * interface (PCI) for low level management.
656 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
657 * Called when a user wants to change the Maximum Transfer Unit
658 * of a device. If not defined, any request to change MTU will
659 * will return an error.
661 * void (*ndo_tx_timeout)(struct net_device *dev);
662 * Callback uses when the transmitter has not made any progress
663 * for dev->watchdog ticks.
665 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
666 * Called when a user wants to get the network device usage
667 * statistics. If not defined, the counters in dev->stats will
670 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
671 * If device support VLAN receive accleration
672 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
673 * when vlan groups for the device changes. Note: grp is NULL
674 * if no vlan's groups are being used.
676 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
677 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
678 * this function is called when a VLAN id is registered.
680 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
681 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
682 * this function is called when a VLAN id is unregistered.
684 * void (*ndo_poll_controller)(struct net_device *dev);
686 * SR-IOV management functions.
687 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
688 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
689 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
690 * int (*ndo_get_vf_config)(struct net_device *dev,
691 * int vf, struct ifla_vf_info *ivf);
692 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
693 * struct nlattr *port[]);
694 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
696 #define HAVE_NET_DEVICE_OPS
697 struct net_device_ops {
698 int (*ndo_init)(struct net_device *dev);
699 void (*ndo_uninit)(struct net_device *dev);
700 int (*ndo_open)(struct net_device *dev);
701 int (*ndo_stop)(struct net_device *dev);
702 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
703 struct net_device *dev);
704 u16 (*ndo_select_queue)(struct net_device *dev,
705 struct sk_buff *skb);
706 void (*ndo_change_rx_flags)(struct net_device *dev,
708 void (*ndo_set_rx_mode)(struct net_device *dev);
709 void (*ndo_set_multicast_list)(struct net_device *dev);
710 int (*ndo_set_mac_address)(struct net_device *dev,
712 int (*ndo_validate_addr)(struct net_device *dev);
713 int (*ndo_do_ioctl)(struct net_device *dev,
714 struct ifreq *ifr, int cmd);
715 int (*ndo_set_config)(struct net_device *dev,
717 int (*ndo_change_mtu)(struct net_device *dev,
719 int (*ndo_neigh_setup)(struct net_device *dev,
720 struct neigh_parms *);
721 void (*ndo_tx_timeout) (struct net_device *dev);
723 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
725 void (*ndo_vlan_rx_register)(struct net_device *dev,
726 struct vlan_group *grp);
727 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
729 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
731 #ifdef CONFIG_NET_POLL_CONTROLLER
732 void (*ndo_poll_controller)(struct net_device *dev);
733 void (*ndo_netpoll_cleanup)(struct net_device *dev);
735 int (*ndo_set_vf_mac)(struct net_device *dev,
737 int (*ndo_set_vf_vlan)(struct net_device *dev,
738 int queue, u16 vlan, u8 qos);
739 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
741 int (*ndo_get_vf_config)(struct net_device *dev,
743 struct ifla_vf_info *ivf);
744 int (*ndo_set_vf_port)(struct net_device *dev,
746 struct nlattr *port[]);
747 int (*ndo_get_vf_port)(struct net_device *dev,
748 int vf, struct sk_buff *skb);
749 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
750 int (*ndo_fcoe_enable)(struct net_device *dev);
751 int (*ndo_fcoe_disable)(struct net_device *dev);
752 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
754 struct scatterlist *sgl,
756 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
758 #define NETDEV_FCOE_WWNN 0
759 #define NETDEV_FCOE_WWPN 1
760 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
766 * The DEVICE structure.
767 * Actually, this whole structure is a big mistake. It mixes I/O
768 * data with strictly "high-level" data, and it has to know about
769 * almost every data structure used in the INET module.
771 * FIXME: cleanup struct net_device such that network protocol info
778 * This is the first field of the "visible" part of this structure
779 * (i.e. as seen by users in the "Space.c" file). It is the name
784 struct pm_qos_request_list *pm_qos_req;
786 /* device name hash chain */
787 struct hlist_node name_hlist;
792 * I/O specific fields
793 * FIXME: Merge these and struct ifmap into one
795 unsigned long mem_end; /* shared mem end */
796 unsigned long mem_start; /* shared mem start */
797 unsigned long base_addr; /* device I/O address */
798 unsigned int irq; /* device IRQ number */
801 * Some hardware also needs these fields, but they are not
802 * part of the usual set specified in Space.c.
805 unsigned char if_port; /* Selectable AUI, TP,..*/
806 unsigned char dma; /* DMA channel */
810 struct list_head dev_list;
811 struct list_head napi_list;
812 struct list_head unreg_list;
814 /* Net device features */
815 unsigned long features;
816 #define NETIF_F_SG 1 /* Scatter/gather IO. */
817 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
818 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
819 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
820 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
821 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
822 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
823 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
824 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
825 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
826 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
827 #define NETIF_F_GSO 2048 /* Enable software GSO. */
828 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
829 /* do not use LLTX in new drivers */
830 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
831 #define NETIF_F_GRO 16384 /* Generic receive offload */
832 #define NETIF_F_LRO 32768 /* large receive offload */
834 /* the GSO_MASK reserves bits 16 through 23 */
835 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
836 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
837 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
838 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
839 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
841 /* Segmentation offload features */
842 #define NETIF_F_GSO_SHIFT 16
843 #define NETIF_F_GSO_MASK 0x00ff0000
844 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
845 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
846 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
847 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
848 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
849 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
851 /* List of features with software fallbacks. */
852 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
855 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
856 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
857 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
858 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
861 * If one device supports one of these features, then enable them
862 * for all in netdev_increment_features.
864 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
865 NETIF_F_SG | NETIF_F_HIGHDMA | \
868 /* Interface index. Unique device identifier */
872 struct net_device_stats stats;
874 #ifdef CONFIG_WIRELESS_EXT
875 /* List of functions to handle Wireless Extensions (instead of ioctl).
876 * See <net/iw_handler.h> for details. Jean II */
877 const struct iw_handler_def * wireless_handlers;
878 /* Instance data managed by the core of Wireless Extensions. */
879 struct iw_public_data * wireless_data;
881 /* Management operations */
882 const struct net_device_ops *netdev_ops;
883 const struct ethtool_ops *ethtool_ops;
885 /* Hardware header description */
886 const struct header_ops *header_ops;
888 unsigned int flags; /* interface flags (a la BSD) */
889 unsigned short gflags;
890 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
891 unsigned short padded; /* How much padding added by alloc_netdev() */
893 unsigned char operstate; /* RFC2863 operstate */
894 unsigned char link_mode; /* mapping policy to operstate */
896 unsigned int mtu; /* interface MTU value */
897 unsigned short type; /* interface hardware type */
898 unsigned short hard_header_len; /* hardware hdr length */
900 /* extra head- and tailroom the hardware may need, but not in all cases
901 * can this be guaranteed, especially tailroom. Some cases also use
902 * LL_MAX_HEADER instead to allocate the skb.
904 unsigned short needed_headroom;
905 unsigned short needed_tailroom;
907 struct net_device *master; /* Pointer to master device of a group,
908 * which this device is member of.
911 /* Interface address info. */
912 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
913 unsigned char addr_len; /* hardware address length */
914 unsigned short dev_id; /* for shared network cards */
916 spinlock_t addr_list_lock;
917 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
918 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
920 unsigned int promiscuity;
921 unsigned int allmulti;
924 /* Protocol specific pointers */
926 #ifdef CONFIG_NET_DSA
927 void *dsa_ptr; /* dsa specific data */
929 void *atalk_ptr; /* AppleTalk link */
930 void *ip_ptr; /* IPv4 specific data */
931 void *dn_ptr; /* DECnet specific data */
932 void *ip6_ptr; /* IPv6 specific data */
933 void *ec_ptr; /* Econet specific data */
934 void *ax25_ptr; /* AX.25 specific data */
935 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
936 assign before registering */
939 * Cache line mostly used on receive path (including eth_type_trans())
941 unsigned long last_rx; /* Time of last Rx */
942 /* Interface address info used in eth_type_trans() */
943 unsigned char *dev_addr; /* hw address, (before bcast
944 because most packets are
947 struct netdev_hw_addr_list dev_addrs; /* list of device
950 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
953 struct kset *queues_kset;
955 struct netdev_rx_queue *_rx;
957 /* Number of RX queues allocated at alloc_netdev_mq() time */
958 unsigned int num_rx_queues;
961 struct netdev_queue rx_queue;
962 rx_handler_func_t *rx_handler;
964 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
966 /* Number of TX queues allocated at alloc_netdev_mq() time */
967 unsigned int num_tx_queues;
969 /* Number of TX queues currently active in device */
970 unsigned int real_num_tx_queues;
972 /* root qdisc from userspace point of view */
975 unsigned long tx_queue_len; /* Max frames per queue allowed */
976 spinlock_t tx_global_lock;
978 * One part is mostly used on xmit path (device)
980 /* These may be needed for future network-power-down code. */
983 * trans_start here is expensive for high speed devices on SMP,
984 * please use netdev_queue->trans_start instead.
986 unsigned long trans_start; /* Time (in jiffies) of last Tx */
988 int watchdog_timeo; /* used by dev_watchdog() */
989 struct timer_list watchdog_timer;
991 /* Number of references to this device */
992 atomic_t refcnt ____cacheline_aligned_in_smp;
994 /* delayed register/unregister */
995 struct list_head todo_list;
996 /* device index hash chain */
997 struct hlist_node index_hlist;
999 struct list_head link_watch_list;
1001 /* register/unregister state machine */
1002 enum { NETREG_UNINITIALIZED=0,
1003 NETREG_REGISTERED, /* completed register_netdevice */
1004 NETREG_UNREGISTERING, /* called unregister_netdevice */
1005 NETREG_UNREGISTERED, /* completed unregister todo */
1006 NETREG_RELEASED, /* called free_netdev */
1007 NETREG_DUMMY, /* dummy device for NAPI poll */
1011 RTNL_LINK_INITIALIZED,
1012 RTNL_LINK_INITIALIZING,
1013 } rtnl_link_state:16;
1015 /* Called from unregister, can be used to call free_netdev */
1016 void (*destructor)(struct net_device *dev);
1018 #ifdef CONFIG_NETPOLL
1019 struct netpoll_info *npinfo;
1022 #ifdef CONFIG_NET_NS
1023 /* Network namespace this network device is inside */
1027 /* mid-layer private */
1031 struct net_bridge_port *br_port;
1033 struct macvlan_port *macvlan_port;
1035 struct garp_port *garp_port;
1037 /* class/net/name entry */
1039 /* space for optional device, statistics, and wireless sysfs groups */
1040 const struct attribute_group *sysfs_groups[4];
1042 /* rtnetlink link ops */
1043 const struct rtnl_link_ops *rtnl_link_ops;
1045 /* VLAN feature mask */
1046 unsigned long vlan_features;
1048 /* for setting kernel sock attribute on TCP connection setup */
1049 #define GSO_MAX_SIZE 65536
1050 unsigned int gso_max_size;
1053 /* Data Center Bridging netlink ops */
1054 const struct dcbnl_rtnl_ops *dcbnl_ops;
1057 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1058 /* max exchange id for FCoE LRO by ddp */
1059 unsigned int fcoe_ddp_xid;
1061 /* n-tuple filter list attached to this device */
1062 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1064 #define to_net_dev(d) container_of(d, struct net_device, dev)
1066 #define NETDEV_ALIGN 32
1069 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1072 return &dev->_tx[index];
1075 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1076 void (*f)(struct net_device *,
1077 struct netdev_queue *,
1083 for (i = 0; i < dev->num_tx_queues; i++)
1084 f(dev, &dev->_tx[i], arg);
1088 * Net namespace inlines
1091 struct net *dev_net(const struct net_device *dev)
1093 return read_pnet(&dev->nd_net);
1097 void dev_net_set(struct net_device *dev, struct net *net)
1099 #ifdef CONFIG_NET_NS
1100 release_net(dev->nd_net);
1101 dev->nd_net = hold_net(net);
1105 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1107 #ifdef CONFIG_NET_DSA_TAG_DSA
1108 if (dev->dsa_ptr != NULL)
1109 return dsa_uses_dsa_tags(dev->dsa_ptr);
1115 #ifndef CONFIG_NET_NS
1116 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1120 #else /* CONFIG_NET_NS */
1121 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1124 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1126 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1127 if (dev->dsa_ptr != NULL)
1128 return dsa_uses_trailer_tags(dev->dsa_ptr);
1135 * netdev_priv - access network device private data
1136 * @dev: network device
1138 * Get network device private data
1140 static inline void *netdev_priv(const struct net_device *dev)
1142 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1145 /* Set the sysfs physical device reference for the network logical device
1146 * if set prior to registration will cause a symlink during initialization.
1148 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1150 /* Set the sysfs device type for the network logical device to allow
1151 * fin grained indentification of different network device types. For
1152 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1154 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1157 * netif_napi_add - initialize a napi context
1158 * @dev: network device
1159 * @napi: napi context
1160 * @poll: polling function
1161 * @weight: default weight
1163 * netif_napi_add() must be used to initialize a napi context prior to calling
1164 * *any* of the other napi related functions.
1166 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1167 int (*poll)(struct napi_struct *, int), int weight);
1170 * netif_napi_del - remove a napi context
1171 * @napi: napi context
1173 * netif_napi_del() removes a napi context from the network device napi list
1175 void netif_napi_del(struct napi_struct *napi);
1177 struct napi_gro_cb {
1178 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1181 /* Length of frag0. */
1182 unsigned int frag0_len;
1184 /* This indicates where we are processing relative to skb->data. */
1187 /* This is non-zero if the packet may be of the same flow. */
1190 /* This is non-zero if the packet cannot be merged with the new skb. */
1193 /* Number of segments aggregated. */
1200 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1202 struct packet_type {
1203 __be16 type; /* This is really htons(ether_type). */
1204 struct net_device *dev; /* NULL is wildcarded here */
1205 int (*func) (struct sk_buff *,
1206 struct net_device *,
1207 struct packet_type *,
1208 struct net_device *);
1209 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1211 int (*gso_send_check)(struct sk_buff *skb);
1212 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1213 struct sk_buff *skb);
1214 int (*gro_complete)(struct sk_buff *skb);
1215 void *af_packet_priv;
1216 struct list_head list;
1219 #include <linux/interrupt.h>
1220 #include <linux/notifier.h>
1222 extern rwlock_t dev_base_lock; /* Device list lock */
1225 #define for_each_netdev(net, d) \
1226 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1227 #define for_each_netdev_reverse(net, d) \
1228 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1229 #define for_each_netdev_rcu(net, d) \
1230 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1231 #define for_each_netdev_safe(net, d, n) \
1232 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1233 #define for_each_netdev_continue(net, d) \
1234 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1235 #define for_each_netdev_continue_rcu(net, d) \
1236 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1237 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1239 static inline struct net_device *next_net_device(struct net_device *dev)
1241 struct list_head *lh;
1245 lh = dev->dev_list.next;
1246 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1249 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1251 struct list_head *lh;
1255 lh = rcu_dereference(dev->dev_list.next);
1256 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1259 static inline struct net_device *first_net_device(struct net *net)
1261 return list_empty(&net->dev_base_head) ? NULL :
1262 net_device_entry(net->dev_base_head.next);
1265 extern int netdev_boot_setup_check(struct net_device *dev);
1266 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1267 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1268 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1269 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1270 extern void dev_add_pack(struct packet_type *pt);
1271 extern void dev_remove_pack(struct packet_type *pt);
1272 extern void __dev_remove_pack(struct packet_type *pt);
1274 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1275 unsigned short mask);
1276 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1277 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1278 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1279 extern int dev_alloc_name(struct net_device *dev, const char *name);
1280 extern int dev_open(struct net_device *dev);
1281 extern int dev_close(struct net_device *dev);
1282 extern void dev_disable_lro(struct net_device *dev);
1283 extern int dev_queue_xmit(struct sk_buff *skb);
1284 extern int register_netdevice(struct net_device *dev);
1285 extern void unregister_netdevice_queue(struct net_device *dev,
1286 struct list_head *head);
1287 extern void unregister_netdevice_many(struct list_head *head);
1288 static inline void unregister_netdevice(struct net_device *dev)
1290 unregister_netdevice_queue(dev, NULL);
1293 extern void free_netdev(struct net_device *dev);
1294 extern void synchronize_net(void);
1295 extern int register_netdevice_notifier(struct notifier_block *nb);
1296 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1297 extern int init_dummy_netdev(struct net_device *dev);
1298 extern void netdev_resync_ops(struct net_device *dev);
1300 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1301 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1302 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1303 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1304 extern int dev_restart(struct net_device *dev);
1305 #ifdef CONFIG_NETPOLL_TRAP
1306 extern int netpoll_trap(void);
1308 extern int skb_gro_receive(struct sk_buff **head,
1309 struct sk_buff *skb);
1310 extern void skb_gro_reset_offset(struct sk_buff *skb);
1312 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1314 return NAPI_GRO_CB(skb)->data_offset;
1317 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1319 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1322 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1324 NAPI_GRO_CB(skb)->data_offset += len;
1327 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1328 unsigned int offset)
1330 return NAPI_GRO_CB(skb)->frag0 + offset;
1333 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1335 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1338 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1339 unsigned int offset)
1341 NAPI_GRO_CB(skb)->frag0 = NULL;
1342 NAPI_GRO_CB(skb)->frag0_len = 0;
1343 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1346 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1348 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1351 static inline void *skb_gro_network_header(struct sk_buff *skb)
1353 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1354 skb_network_offset(skb);
1357 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1358 unsigned short type,
1359 const void *daddr, const void *saddr,
1362 if (!dev->header_ops || !dev->header_ops->create)
1365 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1368 static inline int dev_parse_header(const struct sk_buff *skb,
1369 unsigned char *haddr)
1371 const struct net_device *dev = skb->dev;
1373 if (!dev->header_ops || !dev->header_ops->parse)
1375 return dev->header_ops->parse(skb, haddr);
1378 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1379 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1380 static inline int unregister_gifconf(unsigned int family)
1382 return register_gifconf(family, NULL);
1386 * Incoming packets are placed on per-cpu queues
1388 struct softnet_data {
1389 struct Qdisc *output_queue;
1390 struct Qdisc **output_queue_tailp;
1391 struct list_head poll_list;
1392 struct sk_buff *completion_queue;
1393 struct sk_buff_head process_queue;
1396 unsigned int processed;
1397 unsigned int time_squeeze;
1398 unsigned int cpu_collision;
1399 unsigned int received_rps;
1402 struct softnet_data *rps_ipi_list;
1404 /* Elements below can be accessed between CPUs for RPS */
1405 struct call_single_data csd ____cacheline_aligned_in_smp;
1406 struct softnet_data *rps_ipi_next;
1408 unsigned int input_queue_head;
1409 unsigned int input_queue_tail;
1412 struct sk_buff_head input_pkt_queue;
1413 struct napi_struct backlog;
1416 static inline void input_queue_head_incr(struct softnet_data *sd)
1419 sd->input_queue_head++;
1423 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1424 unsigned int *qtail)
1427 *qtail = ++sd->input_queue_tail;
1431 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1433 #define HAVE_NETIF_QUEUE
1435 extern void __netif_schedule(struct Qdisc *q);
1437 static inline void netif_schedule_queue(struct netdev_queue *txq)
1439 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1440 __netif_schedule(txq->qdisc);
1443 static inline void netif_tx_schedule_all(struct net_device *dev)
1447 for (i = 0; i < dev->num_tx_queues; i++)
1448 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1451 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1453 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1457 * netif_start_queue - allow transmit
1458 * @dev: network device
1460 * Allow upper layers to call the device hard_start_xmit routine.
1462 static inline void netif_start_queue(struct net_device *dev)
1464 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1467 static inline void netif_tx_start_all_queues(struct net_device *dev)
1471 for (i = 0; i < dev->num_tx_queues; i++) {
1472 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1473 netif_tx_start_queue(txq);
1477 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1479 #ifdef CONFIG_NETPOLL_TRAP
1480 if (netpoll_trap()) {
1481 netif_tx_start_queue(dev_queue);
1485 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1486 __netif_schedule(dev_queue->qdisc);
1490 * netif_wake_queue - restart transmit
1491 * @dev: network device
1493 * Allow upper layers to call the device hard_start_xmit routine.
1494 * Used for flow control when transmit resources are available.
1496 static inline void netif_wake_queue(struct net_device *dev)
1498 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1501 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1505 for (i = 0; i < dev->num_tx_queues; i++) {
1506 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1507 netif_tx_wake_queue(txq);
1511 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1513 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1517 * netif_stop_queue - stop transmitted packets
1518 * @dev: network device
1520 * Stop upper layers calling the device hard_start_xmit routine.
1521 * Used for flow control when transmit resources are unavailable.
1523 static inline void netif_stop_queue(struct net_device *dev)
1525 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1528 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1532 for (i = 0; i < dev->num_tx_queues; i++) {
1533 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1534 netif_tx_stop_queue(txq);
1538 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1540 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1544 * netif_queue_stopped - test if transmit queue is flowblocked
1545 * @dev: network device
1547 * Test if transmit queue on device is currently unable to send.
1549 static inline int netif_queue_stopped(const struct net_device *dev)
1551 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1554 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1556 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1560 * netif_running - test if up
1561 * @dev: network device
1563 * Test if the device has been brought up.
1565 static inline int netif_running(const struct net_device *dev)
1567 return test_bit(__LINK_STATE_START, &dev->state);
1571 * Routines to manage the subqueues on a device. We only need start
1572 * stop, and a check if it's stopped. All other device management is
1573 * done at the overall netdevice level.
1574 * Also test the device if we're multiqueue.
1578 * netif_start_subqueue - allow sending packets on subqueue
1579 * @dev: network device
1580 * @queue_index: sub queue index
1582 * Start individual transmit queue of a device with multiple transmit queues.
1584 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1586 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1588 netif_tx_start_queue(txq);
1592 * netif_stop_subqueue - stop sending packets on subqueue
1593 * @dev: network device
1594 * @queue_index: sub queue index
1596 * Stop individual transmit queue of a device with multiple transmit queues.
1598 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1600 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1601 #ifdef CONFIG_NETPOLL_TRAP
1605 netif_tx_stop_queue(txq);
1609 * netif_subqueue_stopped - test status of subqueue
1610 * @dev: network device
1611 * @queue_index: sub queue index
1613 * Check individual transmit queue of a device with multiple transmit queues.
1615 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1618 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1620 return netif_tx_queue_stopped(txq);
1623 static inline int netif_subqueue_stopped(const struct net_device *dev,
1624 struct sk_buff *skb)
1626 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1630 * netif_wake_subqueue - allow sending packets on subqueue
1631 * @dev: network device
1632 * @queue_index: sub queue index
1634 * Resume individual transmit queue of a device with multiple transmit queues.
1636 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1638 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1639 #ifdef CONFIG_NETPOLL_TRAP
1643 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1644 __netif_schedule(txq->qdisc);
1648 * netif_is_multiqueue - test if device has multiple transmit queues
1649 * @dev: network device
1651 * Check if device has multiple transmit queues
1653 static inline int netif_is_multiqueue(const struct net_device *dev)
1655 return (dev->num_tx_queues > 1);
1658 /* Use this variant when it is known for sure that it
1659 * is executing from hardware interrupt context or with hardware interrupts
1662 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1664 /* Use this variant in places where it could be invoked
1665 * from either hardware interrupt or other context, with hardware interrupts
1666 * either disabled or enabled.
1668 extern void dev_kfree_skb_any(struct sk_buff *skb);
1670 #define HAVE_NETIF_RX 1
1671 extern int netif_rx(struct sk_buff *skb);
1672 extern int netif_rx_ni(struct sk_buff *skb);
1673 #define HAVE_NETIF_RECEIVE_SKB 1
1674 extern int netif_receive_skb(struct sk_buff *skb);
1675 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1676 struct sk_buff *skb);
1677 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1678 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1679 struct sk_buff *skb);
1680 extern void napi_reuse_skb(struct napi_struct *napi,
1681 struct sk_buff *skb);
1682 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1683 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1684 struct sk_buff *skb,
1686 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1687 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1689 static inline void napi_free_frags(struct napi_struct *napi)
1691 kfree_skb(napi->skb);
1695 extern int netdev_rx_handler_register(struct net_device *dev,
1696 rx_handler_func_t *rx_handler);
1697 extern void netdev_rx_handler_unregister(struct net_device *dev);
1699 extern void netif_nit_deliver(struct sk_buff *skb);
1700 extern int dev_valid_name(const char *name);
1701 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1702 extern int dev_ethtool(struct net *net, struct ifreq *);
1703 extern unsigned dev_get_flags(const struct net_device *);
1704 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1705 extern int dev_change_flags(struct net_device *, unsigned);
1706 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1707 extern int dev_change_name(struct net_device *, const char *);
1708 extern int dev_set_alias(struct net_device *, const char *, size_t);
1709 extern int dev_change_net_namespace(struct net_device *,
1710 struct net *, const char *);
1711 extern int dev_set_mtu(struct net_device *, int);
1712 extern int dev_set_mac_address(struct net_device *,
1714 extern int dev_hard_start_xmit(struct sk_buff *skb,
1715 struct net_device *dev,
1716 struct netdev_queue *txq);
1717 extern int dev_forward_skb(struct net_device *dev,
1718 struct sk_buff *skb);
1720 extern int netdev_budget;
1722 /* Called by rtnetlink.c:rtnl_unlock() */
1723 extern void netdev_run_todo(void);
1726 * dev_put - release reference to device
1727 * @dev: network device
1729 * Release reference to device to allow it to be freed.
1731 static inline void dev_put(struct net_device *dev)
1733 atomic_dec(&dev->refcnt);
1737 * dev_hold - get reference to device
1738 * @dev: network device
1740 * Hold reference to device to keep it from being freed.
1742 static inline void dev_hold(struct net_device *dev)
1744 atomic_inc(&dev->refcnt);
1747 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1748 * and _off may be called from IRQ context, but it is caller
1749 * who is responsible for serialization of these calls.
1751 * The name carrier is inappropriate, these functions should really be
1752 * called netif_lowerlayer_*() because they represent the state of any
1753 * kind of lower layer not just hardware media.
1756 extern void linkwatch_fire_event(struct net_device *dev);
1757 extern void linkwatch_forget_dev(struct net_device *dev);
1760 * netif_carrier_ok - test if carrier present
1761 * @dev: network device
1763 * Check if carrier is present on device
1765 static inline int netif_carrier_ok(const struct net_device *dev)
1767 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1770 extern unsigned long dev_trans_start(struct net_device *dev);
1772 extern void __netdev_watchdog_up(struct net_device *dev);
1774 extern void netif_carrier_on(struct net_device *dev);
1776 extern void netif_carrier_off(struct net_device *dev);
1778 extern void netif_notify_peers(struct net_device *dev);
1781 * netif_dormant_on - mark device as dormant.
1782 * @dev: network device
1784 * Mark device as dormant (as per RFC2863).
1786 * The dormant state indicates that the relevant interface is not
1787 * actually in a condition to pass packets (i.e., it is not 'up') but is
1788 * in a "pending" state, waiting for some external event. For "on-
1789 * demand" interfaces, this new state identifies the situation where the
1790 * interface is waiting for events to place it in the up state.
1793 static inline void netif_dormant_on(struct net_device *dev)
1795 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1796 linkwatch_fire_event(dev);
1800 * netif_dormant_off - set device as not dormant.
1801 * @dev: network device
1803 * Device is not in dormant state.
1805 static inline void netif_dormant_off(struct net_device *dev)
1807 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1808 linkwatch_fire_event(dev);
1812 * netif_dormant - test if carrier present
1813 * @dev: network device
1815 * Check if carrier is present on device
1817 static inline int netif_dormant(const struct net_device *dev)
1819 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1824 * netif_oper_up - test if device is operational
1825 * @dev: network device
1827 * Check if carrier is operational
1829 static inline int netif_oper_up(const struct net_device *dev)
1831 return (dev->operstate == IF_OPER_UP ||
1832 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1836 * netif_device_present - is device available or removed
1837 * @dev: network device
1839 * Check if device has not been removed from system.
1841 static inline int netif_device_present(struct net_device *dev)
1843 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1846 extern void netif_device_detach(struct net_device *dev);
1848 extern void netif_device_attach(struct net_device *dev);
1851 * Network interface message level settings
1853 #define HAVE_NETIF_MSG 1
1856 NETIF_MSG_DRV = 0x0001,
1857 NETIF_MSG_PROBE = 0x0002,
1858 NETIF_MSG_LINK = 0x0004,
1859 NETIF_MSG_TIMER = 0x0008,
1860 NETIF_MSG_IFDOWN = 0x0010,
1861 NETIF_MSG_IFUP = 0x0020,
1862 NETIF_MSG_RX_ERR = 0x0040,
1863 NETIF_MSG_TX_ERR = 0x0080,
1864 NETIF_MSG_TX_QUEUED = 0x0100,
1865 NETIF_MSG_INTR = 0x0200,
1866 NETIF_MSG_TX_DONE = 0x0400,
1867 NETIF_MSG_RX_STATUS = 0x0800,
1868 NETIF_MSG_PKTDATA = 0x1000,
1869 NETIF_MSG_HW = 0x2000,
1870 NETIF_MSG_WOL = 0x4000,
1873 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1874 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1875 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1876 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1877 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1878 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1879 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1880 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1881 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1882 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1883 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1884 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1885 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1886 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1887 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1889 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1892 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1893 return default_msg_enable_bits;
1894 if (debug_value == 0) /* no output */
1896 /* set low N bits */
1897 return (1 << debug_value) - 1;
1900 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1902 spin_lock(&txq->_xmit_lock);
1903 txq->xmit_lock_owner = cpu;
1906 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1908 spin_lock_bh(&txq->_xmit_lock);
1909 txq->xmit_lock_owner = smp_processor_id();
1912 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1914 int ok = spin_trylock(&txq->_xmit_lock);
1916 txq->xmit_lock_owner = smp_processor_id();
1920 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1922 txq->xmit_lock_owner = -1;
1923 spin_unlock(&txq->_xmit_lock);
1926 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1928 txq->xmit_lock_owner = -1;
1929 spin_unlock_bh(&txq->_xmit_lock);
1932 static inline void txq_trans_update(struct netdev_queue *txq)
1934 if (txq->xmit_lock_owner != -1)
1935 txq->trans_start = jiffies;
1939 * netif_tx_lock - grab network device transmit lock
1940 * @dev: network device
1942 * Get network device transmit lock
1944 static inline void netif_tx_lock(struct net_device *dev)
1949 spin_lock(&dev->tx_global_lock);
1950 cpu = smp_processor_id();
1951 for (i = 0; i < dev->num_tx_queues; i++) {
1952 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1954 /* We are the only thread of execution doing a
1955 * freeze, but we have to grab the _xmit_lock in
1956 * order to synchronize with threads which are in
1957 * the ->hard_start_xmit() handler and already
1958 * checked the frozen bit.
1960 __netif_tx_lock(txq, cpu);
1961 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1962 __netif_tx_unlock(txq);
1966 static inline void netif_tx_lock_bh(struct net_device *dev)
1972 static inline void netif_tx_unlock(struct net_device *dev)
1976 for (i = 0; i < dev->num_tx_queues; i++) {
1977 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1979 /* No need to grab the _xmit_lock here. If the
1980 * queue is not stopped for another reason, we
1983 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1984 netif_schedule_queue(txq);
1986 spin_unlock(&dev->tx_global_lock);
1989 static inline void netif_tx_unlock_bh(struct net_device *dev)
1991 netif_tx_unlock(dev);
1995 #define HARD_TX_LOCK(dev, txq, cpu) { \
1996 if ((dev->features & NETIF_F_LLTX) == 0) { \
1997 __netif_tx_lock(txq, cpu); \
2001 #define HARD_TX_UNLOCK(dev, txq) { \
2002 if ((dev->features & NETIF_F_LLTX) == 0) { \
2003 __netif_tx_unlock(txq); \
2007 static inline void netif_tx_disable(struct net_device *dev)
2013 cpu = smp_processor_id();
2014 for (i = 0; i < dev->num_tx_queues; i++) {
2015 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2017 __netif_tx_lock(txq, cpu);
2018 netif_tx_stop_queue(txq);
2019 __netif_tx_unlock(txq);
2024 static inline void netif_addr_lock(struct net_device *dev)
2026 spin_lock(&dev->addr_list_lock);
2029 static inline void netif_addr_lock_bh(struct net_device *dev)
2031 spin_lock_bh(&dev->addr_list_lock);
2034 static inline void netif_addr_unlock(struct net_device *dev)
2036 spin_unlock(&dev->addr_list_lock);
2039 static inline void netif_addr_unlock_bh(struct net_device *dev)
2041 spin_unlock_bh(&dev->addr_list_lock);
2045 * dev_addrs walker. Should be used only for read access. Call with
2046 * rcu_read_lock held.
2048 #define for_each_dev_addr(dev, ha) \
2049 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2051 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2053 extern void ether_setup(struct net_device *dev);
2055 /* Support for loadable net-drivers */
2056 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
2057 void (*setup)(struct net_device *),
2058 unsigned int queue_count);
2059 #define alloc_netdev(sizeof_priv, name, setup) \
2060 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2061 extern int register_netdev(struct net_device *dev);
2062 extern void unregister_netdev(struct net_device *dev);
2064 /* General hardware address lists handling functions */
2065 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2066 struct netdev_hw_addr_list *from_list,
2067 int addr_len, unsigned char addr_type);
2068 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2069 struct netdev_hw_addr_list *from_list,
2070 int addr_len, unsigned char addr_type);
2071 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2072 struct netdev_hw_addr_list *from_list,
2074 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2075 struct netdev_hw_addr_list *from_list,
2077 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2078 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2080 /* Functions used for device addresses handling */
2081 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2082 unsigned char addr_type);
2083 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2084 unsigned char addr_type);
2085 extern int dev_addr_add_multiple(struct net_device *to_dev,
2086 struct net_device *from_dev,
2087 unsigned char addr_type);
2088 extern int dev_addr_del_multiple(struct net_device *to_dev,
2089 struct net_device *from_dev,
2090 unsigned char addr_type);
2091 extern void dev_addr_flush(struct net_device *dev);
2092 extern int dev_addr_init(struct net_device *dev);
2094 /* Functions used for unicast addresses handling */
2095 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2096 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2097 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2098 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2099 extern void dev_uc_flush(struct net_device *dev);
2100 extern void dev_uc_init(struct net_device *dev);
2102 /* Functions used for multicast addresses handling */
2103 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2104 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2105 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2106 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2107 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2108 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2109 extern void dev_mc_flush(struct net_device *dev);
2110 extern void dev_mc_init(struct net_device *dev);
2112 /* Functions used for secondary unicast and multicast support */
2113 extern void dev_set_rx_mode(struct net_device *dev);
2114 extern void __dev_set_rx_mode(struct net_device *dev);
2115 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2116 extern int dev_set_allmulti(struct net_device *dev, int inc);
2117 extern void netdev_state_change(struct net_device *dev);
2118 extern int netdev_bonding_change(struct net_device *dev,
2119 unsigned long event);
2120 extern void netdev_features_change(struct net_device *dev);
2121 /* Load a device via the kmod */
2122 extern void dev_load(struct net *net, const char *name);
2123 extern void dev_mcast_init(void);
2124 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
2125 extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
2127 extern int netdev_max_backlog;
2128 extern int netdev_tstamp_prequeue;
2129 extern int weight_p;
2130 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2131 extern int skb_checksum_help(struct sk_buff *skb);
2132 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2134 extern void netdev_rx_csum_fault(struct net_device *dev);
2136 static inline void netdev_rx_csum_fault(struct net_device *dev)
2140 /* rx skb timestamps */
2141 extern void net_enable_timestamp(void);
2142 extern void net_disable_timestamp(void);
2144 #ifdef CONFIG_PROC_FS
2145 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2146 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2147 extern void dev_seq_stop(struct seq_file *seq, void *v);
2150 extern int netdev_class_create_file(struct class_attribute *class_attr);
2151 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2153 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2155 extern void linkwatch_run_queue(void);
2157 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2158 unsigned long mask);
2159 unsigned long netdev_fix_features(unsigned long features, const char *name);
2161 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2162 struct net_device *dev);
2164 static inline int net_gso_ok(int features, int gso_type)
2166 int feature = gso_type << NETIF_F_GSO_SHIFT;
2167 return (features & feature) == feature;
2170 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2172 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2173 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
2176 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2178 return skb_is_gso(skb) &&
2179 (!skb_gso_ok(skb, dev->features) ||
2180 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2183 static inline void netif_set_gso_max_size(struct net_device *dev,
2186 dev->gso_max_size = size;
2189 extern int __skb_bond_should_drop(struct sk_buff *skb,
2190 struct net_device *master);
2192 static inline int skb_bond_should_drop(struct sk_buff *skb,
2193 struct net_device *master)
2196 return __skb_bond_should_drop(skb, master);
2200 extern struct pernet_operations __net_initdata loopback_net_ops;
2202 static inline int dev_ethtool_get_settings(struct net_device *dev,
2203 struct ethtool_cmd *cmd)
2205 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2207 return dev->ethtool_ops->get_settings(dev, cmd);
2210 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2212 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2214 return dev->ethtool_ops->get_rx_csum(dev);
2217 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2219 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2221 return dev->ethtool_ops->get_flags(dev);
2224 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2226 /* netdev_printk helpers, similar to dev_printk */
2228 static inline const char *netdev_name(const struct net_device *dev)
2230 if (dev->reg_state != NETREG_REGISTERED)
2231 return "(unregistered net_device)";
2235 #define netdev_printk(level, netdev, format, args...) \
2236 dev_printk(level, (netdev)->dev.parent, \
2238 netdev_name(netdev), ##args)
2240 #define netdev_emerg(dev, format, args...) \
2241 netdev_printk(KERN_EMERG, dev, format, ##args)
2242 #define netdev_alert(dev, format, args...) \
2243 netdev_printk(KERN_ALERT, dev, format, ##args)
2244 #define netdev_crit(dev, format, args...) \
2245 netdev_printk(KERN_CRIT, dev, format, ##args)
2246 #define netdev_err(dev, format, args...) \
2247 netdev_printk(KERN_ERR, dev, format, ##args)
2248 #define netdev_warn(dev, format, args...) \
2249 netdev_printk(KERN_WARNING, dev, format, ##args)
2250 #define netdev_notice(dev, format, args...) \
2251 netdev_printk(KERN_NOTICE, dev, format, ##args)
2252 #define netdev_info(dev, format, args...) \
2253 netdev_printk(KERN_INFO, dev, format, ##args)
2256 #define netdev_dbg(__dev, format, args...) \
2257 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2258 #elif defined(CONFIG_DYNAMIC_DEBUG)
2259 #define netdev_dbg(__dev, format, args...) \
2261 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2262 netdev_name(__dev), ##args); \
2265 #define netdev_dbg(__dev, format, args...) \
2268 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2273 #if defined(VERBOSE_DEBUG)
2274 #define netdev_vdbg netdev_dbg
2277 #define netdev_vdbg(dev, format, args...) \
2280 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2286 * netdev_WARN() acts like dev_printk(), but with the key difference
2287 * of using a WARN/WARN_ON to get the message out, including the
2288 * file/line information and a backtrace.
2290 #define netdev_WARN(dev, format, args...) \
2291 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2293 /* netif printk helpers, similar to netdev_printk */
2295 #define netif_printk(priv, type, level, dev, fmt, args...) \
2297 if (netif_msg_##type(priv)) \
2298 netdev_printk(level, (dev), fmt, ##args); \
2301 #define netif_emerg(priv, type, dev, fmt, args...) \
2302 netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
2303 #define netif_alert(priv, type, dev, fmt, args...) \
2304 netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
2305 #define netif_crit(priv, type, dev, fmt, args...) \
2306 netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
2307 #define netif_err(priv, type, dev, fmt, args...) \
2308 netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
2309 #define netif_warn(priv, type, dev, fmt, args...) \
2310 netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
2311 #define netif_notice(priv, type, dev, fmt, args...) \
2312 netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
2313 #define netif_info(priv, type, dev, fmt, args...) \
2314 netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)
2317 #define netif_dbg(priv, type, dev, format, args...) \
2318 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2319 #elif defined(CONFIG_DYNAMIC_DEBUG)
2320 #define netif_dbg(priv, type, netdev, format, args...) \
2322 if (netif_msg_##type(priv)) \
2323 dynamic_dev_dbg((netdev)->dev.parent, \
2325 netdev_name(netdev), ##args); \
2328 #define netif_dbg(priv, type, dev, format, args...) \
2331 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2336 #if defined(VERBOSE_DEBUG)
2337 #define netif_vdbg netdev_dbg
2339 #define netif_vdbg(priv, type, dev, format, args...) \
2342 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2347 #endif /* __KERNEL__ */
2349 #endif /* _LINUX_NETDEVICE_H */