diff options
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 5116 |
1 files changed, 3847 insertions, 1269 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 0741a1e919a5..5870a9e514a5 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket @@ -15,65 +16,88 @@ * Bjorn Ekwall. <bj0rn@blox.se> * Pekka Riikonen <priikone@poseidon.pspt.fi> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Moved to /usr/include/linux for NET3 */ #ifndef _LINUX_NETDEVICE_H #define _LINUX_NETDEVICE_H -#include <linux/pm_qos.h> #include <linux/timer.h> #include <linux/bug.h> #include <linux/delay.h> #include <linux/atomic.h> +#include <linux/prefetch.h> #include <asm/cache.h> #include <asm/byteorder.h> +#include <asm/local.h> #include <linux/percpu.h> #include <linux/rculist.h> -#include <linux/dmaengine.h> #include <linux/workqueue.h> #include <linux/dynamic_queue_limits.h> -#include <linux/ethtool.h> #include <net/net_namespace.h> -#include <net/dsa.h> #ifdef CONFIG_DCB #include <net/dcbnl.h> #endif #include <net/netprio_cgroup.h> - #include <linux/netdev_features.h> #include <linux/neighbour.h> +#include <linux/netdevice_xmit.h> #include <uapi/linux/netdevice.h> +#include <uapi/linux/if_bonding.h> +#include <uapi/linux/pkt_cls.h> +#include <uapi/linux/netdev.h> +#include <linux/hashtable.h> +#include <linux/rbtree.h> +#include <net/net_trackers.h> +#include <net/net_debug.h> +#include <net/dropreason-core.h> +#include <net/neighbour_tables.h> struct netpoll_info; struct device; +struct ethtool_ops; +struct kernel_hwtstamp_config; struct phy_device; +struct dsa_port; +struct ip_tunnel_parm_kern; +struct macsec_context; +struct macsec_ops; +struct netdev_config; +struct netdev_name_node; +struct sd_flow_limit; +struct sfp_bus; /* 802.11 specific */ struct wireless_dev; - /* source back-compat hooks */ -#define SET_ETHTOOL_OPS(netdev,ops) \ - ( (netdev)->ethtool_ops = (ops) ) - -extern void netdev_set_default_ethtool_ops(struct net_device *dev, - const struct ethtool_ops *ops); - -/* hardware address assignment types */ -#define NET_ADDR_PERM 0 /* address is permanent (default) */ -#define NET_ADDR_RANDOM 1 /* address is generated randomly */ -#define NET_ADDR_STOLEN 2 /* address is stolen from other device */ -#define NET_ADDR_SET 3 /* address is set using - * dev_set_mac_address() */ +/* 802.15.4 specific */ +struct wpan_dev; +struct mpls_dev; +/* UDP Tunnel offloads */ +struct udp_tunnel_info; +struct udp_tunnel_nic_info; +struct udp_tunnel_nic; +struct bpf_prog; +struct xdp_buff; +struct xdp_frame; +struct xdp_metadata_ops; +struct xdp_md; +struct ethtool_netdev_state; +struct phy_link_topology; +struct hwtstamp_provider; + +typedef u32 xdp_features_t; + +void synchronize_net(void); +void netdev_set_default_ethtool_ops(struct net_device *dev, + const struct ethtool_ops *ops); +void netdev_sw_irq_coalesce_default_on(struct net_device *dev); /* Backlog congestion levels */ #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ #define NET_RX_DROP 1 /* packet dropped */ +#define MAX_NEST_DEV 8 + /* * Transmit return codes: transmit return codes originate from three different * namespaces: @@ -86,8 +110,8 @@ extern void netdev_set_default_ethtool_ops(struct net_device *dev, * function. Real network devices commonly used with qdiscs should only return * the driver transmit return codes though - when qdiscs are used, the actual * transmission happens asynchronously, so the value is not propagated to - * higher layers. Virtual network devices transmit synchronously, in this case - * the driver transmit return codes are consumed by dev_queue_xmit(), all + * higher layers. Virtual network devices transmit synchronously; in this case + * the driver transmit return codes are consumed by dev_queue_xmit(), and all * others are propagated to higher layers. */ @@ -95,7 +119,6 @@ extern void netdev_set_default_ethtool_ops(struct net_device *dev, #define NET_XMIT_SUCCESS 0x00 #define NET_XMIT_DROP 0x01 /* skb dropped */ #define NET_XMIT_CN 0x02 /* congestion notification */ -#define NET_XMIT_POLICED 0x03 /* skb is shot by police */ #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It @@ -111,7 +134,6 @@ enum netdev_tx { __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ NETDEV_TX_OK = 0x00, /* driver took care of packet */ NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ - NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ }; typedef enum netdev_tx netdev_tx_t; @@ -134,11 +156,13 @@ static inline bool dev_xmit_complete(int rc) } /* - * Compute the worst case header length according to the protocols + * Compute the worst-case header length according to the protocols * used. */ -#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) +#if defined(CONFIG_HYPERV_NET) +# define LL_MAX_HEADER 128 +#elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) # if defined(CONFIG_MAC80211_MESH) # define LL_MAX_HEADER 128 # else @@ -160,54 +184,65 @@ static inline bool dev_xmit_complete(int rc) * (unsigned long) so they can be read and written atomically. */ +#define NET_DEV_STAT(FIELD) \ + union { \ + unsigned long FIELD; \ + atomic_long_t __##FIELD; \ + } + struct net_device_stats { - unsigned long rx_packets; - unsigned long tx_packets; - unsigned long rx_bytes; - unsigned long tx_bytes; - unsigned long rx_errors; - unsigned long tx_errors; - unsigned long rx_dropped; - unsigned long tx_dropped; - unsigned long multicast; - unsigned long collisions; - unsigned long rx_length_errors; - unsigned long rx_over_errors; - unsigned long rx_crc_errors; - unsigned long rx_frame_errors; - unsigned long rx_fifo_errors; - unsigned long rx_missed_errors; - unsigned long tx_aborted_errors; - unsigned long tx_carrier_errors; - unsigned long tx_fifo_errors; - unsigned long tx_heartbeat_errors; - unsigned long tx_window_errors; - unsigned long rx_compressed; - unsigned long tx_compressed; + NET_DEV_STAT(rx_packets); + NET_DEV_STAT(tx_packets); + NET_DEV_STAT(rx_bytes); + NET_DEV_STAT(tx_bytes); + NET_DEV_STAT(rx_errors); + NET_DEV_STAT(tx_errors); + NET_DEV_STAT(rx_dropped); + NET_DEV_STAT(tx_dropped); + NET_DEV_STAT(multicast); + NET_DEV_STAT(collisions); + NET_DEV_STAT(rx_length_errors); + NET_DEV_STAT(rx_over_errors); + NET_DEV_STAT(rx_crc_errors); + NET_DEV_STAT(rx_frame_errors); + NET_DEV_STAT(rx_fifo_errors); + NET_DEV_STAT(rx_missed_errors); + NET_DEV_STAT(tx_aborted_errors); + NET_DEV_STAT(tx_carrier_errors); + NET_DEV_STAT(tx_fifo_errors); + NET_DEV_STAT(tx_heartbeat_errors); + NET_DEV_STAT(tx_window_errors); + NET_DEV_STAT(rx_compressed); + NET_DEV_STAT(tx_compressed); }; +#undef NET_DEV_STAT +/* per-cpu stats, allocated on demand. + * Try to fit them in a single cache line, for dev_get_stats() sake. + */ +struct net_device_core_stats { + unsigned long rx_dropped; + unsigned long tx_dropped; + unsigned long rx_nohandler; + unsigned long rx_otherhost_dropped; +} __aligned(4 * sizeof(unsigned long)); #include <linux/cache.h> #include <linux/skbuff.h> -#ifdef CONFIG_RPS -#include <linux/static_key.h> -extern struct static_key rps_needed; -#endif - struct neighbour; struct neigh_parms; struct sk_buff; struct netdev_hw_addr { struct list_head list; + struct rb_node node; unsigned char addr[MAX_ADDR_LEN]; unsigned char type; #define NETDEV_HW_ADDR_T_LAN 1 #define NETDEV_HW_ADDR_T_SAN 2 -#define NETDEV_HW_ADDR_T_SLAVE 3 -#define NETDEV_HW_ADDR_T_UNICAST 4 -#define NETDEV_HW_ADDR_T_MULTICAST 5 +#define NETDEV_HW_ADDR_T_UNICAST 3 +#define NETDEV_HW_ADDR_T_MULTICAST 4 bool global_use; int sync_cnt; int refcount; @@ -218,6 +253,9 @@ struct netdev_hw_addr { struct netdev_hw_addr_list { struct list_head list; int count; + + /* Auxiliary tree for faster lookup on addition and deletion */ + struct rb_root tree; }; #define netdev_hw_addr_list_count(l) ((l)->count) @@ -229,15 +267,20 @@ struct netdev_hw_addr_list { #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) #define netdev_for_each_uc_addr(ha, dev) \ netdev_hw_addr_list_for_each(ha, &(dev)->uc) +#define netdev_for_each_synced_uc_addr(_ha, _dev) \ + netdev_for_each_uc_addr((_ha), (_dev)) \ + if ((_ha)->sync_cnt) #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) #define netdev_for_each_mc_addr(ha, dev) \ netdev_hw_addr_list_for_each(ha, &(dev)->mc) +#define netdev_for_each_synced_mc_addr(_ha, _dev) \ + netdev_for_each_mc_addr((_ha), (_dev)) \ + if ((_ha)->sync_cnt) struct hh_cache { - u16 hh_len; - u16 __pad; + unsigned int hh_len; seqlock_t hh_lock; /* cached hardware header; allow for machine alignment needs. */ @@ -249,7 +292,7 @@ struct hh_cache { unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; }; -/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. +/* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. * Alternative is: * dev->hard_header_len ? (dev->hard_header_len + * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 @@ -258,24 +301,27 @@ struct hh_cache { * relationship HH alignment <= LL alignment. */ #define LL_RESERVED_SPACE(dev) \ - ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) + ((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom)) \ + & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD) #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ - ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) + ((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom) + (extra)) \ + & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD) struct header_ops { int (*create) (struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len); int (*parse)(const struct sk_buff *skb, unsigned char *haddr); - int (*rebuild)(struct sk_buff *skb); int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); void (*cache_update)(struct hh_cache *hh, const struct net_device *dev, const unsigned char *haddr); + bool (*validate)(const char *ll_header, unsigned int len); + __be16 (*parse_protocol)(const struct sk_buff *skb); }; /* These flag bits are private to the generic network queueing - * layer, they may not be explicitly referenced by any other + * layer; they may not be explicitly referenced by any other * code. */ @@ -285,54 +331,119 @@ enum netdev_state_t { __LINK_STATE_NOCARRIER, __LINK_STATE_LINKWATCH_PENDING, __LINK_STATE_DORMANT, + __LINK_STATE_TESTING, }; +struct gro_list { + struct list_head list; + int count; +}; /* - * This structure holds at boot time configured netdevice settings. They - * are then used in the device probing. + * size of gro hash buckets, must be <= the number of bits in + * gro_node::bitmask */ -struct netdev_boot_setup { - char name[IFNAMSIZ]; - struct ifmap map; +#define GRO_HASH_BUCKETS 8 + +/** + * struct gro_node - structure to support Generic Receive Offload + * @bitmask: bitmask to indicate used buckets in @hash + * @hash: hashtable of pending aggregated skbs, separated by flows + * @rx_list: list of pending ``GRO_NORMAL`` skbs + * @rx_count: cached current length of @rx_list + * @cached_napi_id: napi_struct::napi_id cached for hotpath, 0 for standalone + */ +struct gro_node { + unsigned long bitmask; + struct gro_list hash[GRO_HASH_BUCKETS]; + struct list_head rx_list; + u32 rx_count; + u32 cached_napi_id; }; -#define NETDEV_BOOT_SETUP_MAX 8 -extern int __init netdev_boot_setup(char *str); +/* + * Structure for per-NAPI config + */ +struct napi_config { + u64 gro_flush_timeout; + u64 irq_suspend_timeout; + u32 defer_hard_irqs; + cpumask_t affinity_mask; + u8 threaded; + unsigned int napi_id; +}; /* * Structure for NAPI scheduling similar to tasklet but with weighting */ struct napi_struct { + /* This field should be first or softnet_data.backlog needs tweaks. */ + unsigned long state; /* The poll_list must only be managed by the entity which * changes the state of the NAPI_STATE_SCHED bit. This means * whoever atomically sets that bit can add this napi_struct - * to the per-cpu poll_list, and whoever clears that bit + * to the per-CPU poll_list, and whoever clears that bit * can remove from the list right before clearing the bit. */ struct list_head poll_list; - unsigned long state; int weight; - unsigned int gro_count; + u32 defer_hard_irqs_count; int (*poll)(struct napi_struct *, int); #ifdef CONFIG_NETPOLL - spinlock_t poll_lock; + /* CPU actively polling if netpoll is configured */ int poll_owner; #endif + /* CPU on which NAPI has been scheduled for processing */ + int list_owner; struct net_device *dev; - struct sk_buff *gro_list; struct sk_buff *skb; + struct gro_node gro; + struct hrtimer timer; + /* all fields past this point are write-protected by netdev_lock */ + struct task_struct *thread; + unsigned long gro_flush_timeout; + unsigned long irq_suspend_timeout; + u32 defer_hard_irqs; + /* control-path-only fields follow */ + u32 napi_id; struct list_head dev_list; struct hlist_node napi_hash_node; - unsigned int napi_id; + int irq; + struct irq_affinity_notify notify; + int napi_rmap_idx; + int index; + struct napi_config *config; }; enum { - NAPI_STATE_SCHED, /* Poll is scheduled */ - NAPI_STATE_DISABLE, /* Disable pending */ - NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ - NAPI_STATE_HASHED, /* In NAPI hash */ + NAPI_STATE_SCHED, /* Poll is scheduled */ + NAPI_STATE_MISSED, /* reschedule a napi */ + NAPI_STATE_DISABLE, /* Disable pending */ + NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ + NAPI_STATE_LISTED, /* NAPI added to system lists */ + NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */ + NAPI_STATE_IN_BUSY_POLL, /* Do not rearm NAPI interrupt */ + NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/ + NAPI_STATE_THREADED, /* The poll is performed inside its own thread*/ + NAPI_STATE_SCHED_THREADED, /* Napi is currently scheduled in threaded mode */ + NAPI_STATE_HAS_NOTIFIER, /* Napi has an IRQ notifier */ + NAPI_STATE_THREADED_BUSY_POLL, /* The threaded NAPI poller will busy poll */ +}; + +enum { + NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED), + NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED), + NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE), + NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC), + NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED), + NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL), + NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL), + NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL), + NAPIF_STATE_THREADED = BIT(NAPI_STATE_THREADED), + NAPIF_STATE_SCHED_THREADED = BIT(NAPI_STATE_SCHED_THREADED), + NAPIF_STATE_HAS_NOTIFIER = BIT(NAPI_STATE_HAS_NOTIFIER), + NAPIF_STATE_THREADED_BUSY_POLL = BIT(NAPI_STATE_THREADED_BUSY_POLL), }; enum gro_result { @@ -340,7 +451,7 @@ enum gro_result { GRO_MERGED_FREE, GRO_HELD, GRO_NORMAL, - GRO_DROP, + GRO_CONSUMED, }; typedef enum gro_result gro_result_t; @@ -351,7 +462,7 @@ typedef enum gro_result gro_result_t; * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in * case skb->dev was changed by rx_handler. * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. - * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. + * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. * * rx_handlers are functions called from inside __netif_receive_skb(), to do * special processing of the skb, prior to delivery to protocol handlers. @@ -366,19 +477,19 @@ typedef enum gro_result gro_result_t; * Upon return, rx_handler is expected to tell __netif_receive_skb() what to * do with the skb. * - * If the rx_handler consumed to skb in some way, it should return + * If the rx_handler consumed the skb in some way, it should return * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for - * the skb to be delivered in some other ways. + * the skb to be delivered in some other way. * * If the rx_handler changed skb->dev, to divert the skb to another * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the * new device will be called if it exists. * - * If the rx_handler consider the skb should be ignored, it should return + * If the rx_handler decides the skb should be ignored, it should return * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that * are registered on exact device (ptype->dev == skb->dev). * - * If the rx_handler didn't changed skb->dev, but want the skb to be normally + * If the rx_handler didn't change skb->dev, but wants the skb to be normally * delivered, it should return RX_HANDLER_PASS. * * A device without a registered rx_handler will behave as if rx_handler @@ -394,119 +505,106 @@ enum rx_handler_result { typedef enum rx_handler_result rx_handler_result_t; typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); -extern void __napi_schedule(struct napi_struct *n); +void __napi_schedule(struct napi_struct *n); +void __napi_schedule_irqoff(struct napi_struct *n); static inline bool napi_disable_pending(struct napi_struct *n) { return test_bit(NAPI_STATE_DISABLE, &n->state); } +static inline bool napi_prefer_busy_poll(struct napi_struct *n) +{ + return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state); +} + /** - * napi_schedule_prep - check if napi can be scheduled - * @n: napi context + * napi_is_scheduled - test if NAPI is scheduled + * @n: NAPI context + * + * This check is "best-effort". With no locking implemented, + * a NAPI can be scheduled or terminate right after this check + * and produce not precise results. * - * Test if NAPI routine is already running, and if not mark - * it as running. This is used as a condition variable - * insure only one NAPI poll instance runs. We also make - * sure there is no pending NAPI disable. + * NAPI_STATE_SCHED is an internal state, napi_is_scheduled + * should not be used normally and napi_schedule should be + * used instead. + * + * Use only if the driver really needs to check if a NAPI + * is scheduled for example in the context of delayed timer + * that can be skipped if a NAPI is already scheduled. + * + * Return: True if NAPI is scheduled, False otherwise. */ -static inline bool napi_schedule_prep(struct napi_struct *n) +static inline bool napi_is_scheduled(struct napi_struct *n) { - return !napi_disable_pending(n) && - !test_and_set_bit(NAPI_STATE_SCHED, &n->state); + return test_bit(NAPI_STATE_SCHED, &n->state); } +bool napi_schedule_prep(struct napi_struct *n); + /** * napi_schedule - schedule NAPI poll - * @n: napi context + * @n: NAPI context * * Schedule NAPI poll routine to be called if it is not already * running. + * Return: true if we schedule a NAPI or false if not. + * Refer to napi_schedule_prep() for additional reason on why + * a NAPI might not be scheduled. */ -static inline void napi_schedule(struct napi_struct *n) +static inline bool napi_schedule(struct napi_struct *n) { - if (napi_schedule_prep(n)) + if (napi_schedule_prep(n)) { __napi_schedule(n); -} - -/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ -static inline bool napi_reschedule(struct napi_struct *napi) -{ - if (napi_schedule_prep(napi)) { - __napi_schedule(napi); return true; } + return false; } /** - * napi_complete - NAPI processing complete - * @n: napi context - * - * Mark NAPI processing as complete. - */ -extern void __napi_complete(struct napi_struct *n); -extern void napi_complete(struct napi_struct *n); - -/** - * napi_by_id - lookup a NAPI by napi_id - * @napi_id: hashed napi_id - * - * lookup @napi_id in napi_hash table - * must be called under rcu_read_lock() - */ -extern struct napi_struct *napi_by_id(unsigned int napi_id); - -/** - * napi_hash_add - add a NAPI to global hashtable - * @napi: napi context - * - * generate a new napi_id and store a @napi under it in napi_hash - */ -extern void napi_hash_add(struct napi_struct *napi); - -/** - * napi_hash_del - remove a NAPI from global table - * @napi: napi context - * - * Warning: caller must observe rcu grace period - * before freeing memory containing @napi - */ -extern void napi_hash_del(struct napi_struct *napi); - -/** - * napi_disable - prevent NAPI from scheduling - * @n: napi context + * napi_schedule_irqoff - schedule NAPI poll + * @n: NAPI context * - * Stop NAPI from being scheduled on this context. - * Waits till any outstanding processing completes. + * Variant of napi_schedule(), assuming hard irqs are masked. */ -static inline void napi_disable(struct napi_struct *n) +static inline void napi_schedule_irqoff(struct napi_struct *n) { - set_bit(NAPI_STATE_DISABLE, &n->state); - while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) - msleep(1); - clear_bit(NAPI_STATE_DISABLE, &n->state); + if (napi_schedule_prep(n)) + __napi_schedule_irqoff(n); } /** - * napi_enable - enable NAPI scheduling - * @n: napi context + * napi_complete_done - NAPI processing complete + * @n: NAPI context + * @work_done: number of packets processed * - * Resume NAPI from being scheduled on this context. - * Must be paired with napi_disable. + * Mark NAPI processing as complete. Should only be called if poll budget + * has not been completely consumed. + * Prefer over napi_complete(). + * Return: false if device should avoid rearming interrupts. */ -static inline void napi_enable(struct napi_struct *n) +bool napi_complete_done(struct napi_struct *n, int work_done); + +static inline bool napi_complete(struct napi_struct *n) { - BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); - smp_mb__before_clear_bit(); - clear_bit(NAPI_STATE_SCHED, &n->state); + return napi_complete_done(n, 0); } -#ifdef CONFIG_SMP +void netif_threaded_enable(struct net_device *dev); +int dev_set_threaded(struct net_device *dev, + enum netdev_napi_threaded threaded); + +void napi_disable(struct napi_struct *n); +void napi_disable_locked(struct napi_struct *n); + +void napi_enable(struct napi_struct *n); +void napi_enable_locked(struct napi_struct *n); + /** * napi_synchronize - wait until NAPI is not running - * @n: napi context + * @n: NAPI context * * Wait until NAPI is done being scheduled on this context. * Waits till any outstanding processing completes but @@ -514,22 +612,55 @@ static inline void napi_enable(struct napi_struct *n) */ static inline void napi_synchronize(const struct napi_struct *n) { - while (test_bit(NAPI_STATE_SCHED, &n->state)) - msleep(1); + if (IS_ENABLED(CONFIG_SMP)) + while (test_bit(NAPI_STATE_SCHED, &n->state)) + msleep(1); + else + barrier(); +} + +/** + * napi_if_scheduled_mark_missed - if napi is running, set the + * NAPIF_STATE_MISSED + * @n: NAPI context + * + * If napi is running, set the NAPIF_STATE_MISSED, and return true if + * NAPI is scheduled. + **/ +static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n) +{ + unsigned long val, new; + + val = READ_ONCE(n->state); + do { + if (val & NAPIF_STATE_DISABLE) + return true; + + if (!(val & NAPIF_STATE_SCHED)) + return false; + + new = val | NAPIF_STATE_MISSED; + } while (!try_cmpxchg(&n->state, &val, new)); + + return true; } -#else -# define napi_synchronize(n) barrier() -#endif enum netdev_queue_state_t { __QUEUE_STATE_DRV_XOFF, __QUEUE_STATE_STACK_XOFF, __QUEUE_STATE_FROZEN, -#define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ - (1 << __QUEUE_STATE_STACK_XOFF)) -#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ - (1 << __QUEUE_STATE_FROZEN)) }; + +#define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) +#define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) +#define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) + +#define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) +#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ + QUEUE_STATE_FROZEN) +#define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ + QUEUE_STATE_FROZEN) + /* * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The * netif_tx_* functions below are used to manipulate this flag. The @@ -542,40 +673,88 @@ enum netdev_queue_state_t { struct netdev_queue { /* - * read mostly part + * read-mostly part */ struct net_device *dev; - struct Qdisc *qdisc; - struct Qdisc *qdisc_sleeping; + netdevice_tracker dev_tracker; + + struct Qdisc __rcu *qdisc; + struct Qdisc __rcu *qdisc_sleeping; #ifdef CONFIG_SYSFS struct kobject kobj; + const struct attribute_group **groups; #endif -#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) - int numa_node; + unsigned long tx_maxrate; + /* + * Number of TX timeouts for this queue + * (/sys/class/net/DEV/Q/trans_timeout) + */ + atomic_long_t trans_timeout; + + /* Subordinate device that the queue has been assigned to */ + struct net_device *sb_dev; +#ifdef CONFIG_XDP_SOCKETS + /* "ops protected", see comment about net_device::lock */ + struct xsk_buff_pool *pool; #endif + /* - * write mostly part + * write-mostly part */ +#ifdef CONFIG_BQL + struct dql dql; +#endif spinlock_t _xmit_lock ____cacheline_aligned_in_smp; int xmit_lock_owner; /* - * please use this field instead of dev->trans_start + * Time (in jiffies) of last Tx */ unsigned long trans_start; - /* - * Number of TX timeouts for this queue - * (/sys/class/net/DEV/Q/trans_timeout) - */ - unsigned long trans_timeout; - unsigned long state; -#ifdef CONFIG_BQL - struct dql dql; +/* + * slow- / control-path part + */ + /* NAPI instance for the queue + * "ops protected", see comment about net_device::lock + */ + struct napi_struct *napi; + +#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) + int numa_node; #endif } ____cacheline_aligned_in_smp; +extern int sysctl_fb_tunnels_only_for_init_net; +extern int sysctl_devconf_inherit_init_net; + +/* + * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns + * == 1 : For initns only + * == 2 : For none. + */ +static inline bool net_has_fallback_tunnels(const struct net *net) +{ +#if IS_ENABLED(CONFIG_SYSCTL) + int fb_tunnels_only_for_init_net = READ_ONCE(sysctl_fb_tunnels_only_for_init_net); + + return !fb_tunnels_only_for_init_net || + (net_eq(net, &init_net) && fb_tunnels_only_for_init_net == 1); +#else + return true; +#endif +} + +static inline int net_inherit_devconf(void) +{ +#if IS_ENABLED(CONFIG_SYSCTL) + return READ_ONCE(sysctl_devconf_inherit_init_net); +#else + return 0; +#endif +} + static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) { #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) @@ -592,90 +771,17 @@ static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node #endif } -#ifdef CONFIG_RPS -/* - * This structure holds an RPS map which can be of variable length. The - * map is an array of CPUs. - */ -struct rps_map { - unsigned int len; - struct rcu_head rcu; - u16 cpus[0]; -}; -#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) - -/* - * The rps_dev_flow structure contains the mapping of a flow to a CPU, the - * tail pointer for that CPU's input queue at the time of last enqueue, and - * a hardware filter index. - */ -struct rps_dev_flow { - u16 cpu; - u16 filter; - unsigned int last_qtail; -}; -#define RPS_NO_FILTER 0xffff - -/* - * The rps_dev_flow_table structure contains a table of flow mappings. - */ -struct rps_dev_flow_table { - unsigned int mask; - struct rcu_head rcu; - struct rps_dev_flow flows[0]; -}; -#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ - ((_num) * sizeof(struct rps_dev_flow))) - -/* - * The rps_sock_flow_table contains mappings of flows to the last CPU - * on which they were processed by the application (set in recvmsg). - */ -struct rps_sock_flow_table { - unsigned int mask; - u16 ents[0]; -}; -#define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ - ((_num) * sizeof(u16))) - -#define RPS_NO_CPU 0xffff - -static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, - u32 hash) -{ - if (table && hash) { - unsigned int cpu, index = hash & table->mask; - - /* We only give a hint, preemption can change cpu under us */ - cpu = raw_smp_processor_id(); - - if (table->ents[index] != cpu) - table->ents[index] = cpu; - } -} - -static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, - u32 hash) -{ - if (table && hash) - table->ents[hash & table->mask] = RPS_NO_CPU; -} - -extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; - #ifdef CONFIG_RFS_ACCEL -extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, - u32 flow_id, u16 filter_id); +bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, + u16 filter_id); #endif -/* This structure contains an instance of an RX queue. */ -struct netdev_rx_queue { - struct rps_map __rcu *rps_map; - struct rps_dev_flow_table __rcu *rps_flow_table; - struct kobject kobj; - struct net_device *dev; -} ____cacheline_aligned_in_smp; -#endif /* CONFIG_RPS */ +/* XPS map type and offset of the xps map within net_device->xps_maps[]. */ +enum xps_map_type { + XPS_CPUS = 0, + XPS_RXQS, + XPS_MAPS_MAX, +}; #ifdef CONFIG_XPS /* @@ -686,21 +792,36 @@ struct xps_map { unsigned int len; unsigned int alloc_len; struct rcu_head rcu; - u16 queues[0]; + u16 queues[]; }; #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) -#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ - / sizeof(u16)) +#define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ + - sizeof(struct xps_map)) / sizeof(u16)) /* * This structure holds all XPS maps for device. Maps are indexed by CPU. + * + * We keep track of the number of cpus/rxqs used when the struct is allocated, + * in nr_ids. This will help not accessing out-of-bound memory. + * + * We keep track of the number of traffic classes used when the struct is + * allocated, in num_tc. This will be used to navigate the maps, to ensure we're + * not crossing its upper bound, as the original dev->num_tc can be updated in + * the meantime. */ struct xps_dev_maps { struct rcu_head rcu; - struct xps_map __rcu *cpu_map[0]; + unsigned int nr_ids; + s16 num_tc; + struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */ }; -#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ - (nr_cpu_ids * sizeof(struct xps_map *))) + +#define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ + (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *))) + +#define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\ + (_rxqs * (_tcs) * sizeof(struct xps_map *))) + #endif /* CONFIG_XPS */ #define TC_MAX_QUEUE 16 @@ -728,78 +849,312 @@ struct netdev_fcoe_hbainfo { }; #endif +#define MAX_PHYS_ITEM_ID_LEN 32 + +/* This structure holds a unique identifier to identify some + * physical item (port for example) used by a netdevice. + */ +struct netdev_phys_item_id { + unsigned char id[MAX_PHYS_ITEM_ID_LEN]; + unsigned char id_len; +}; + +static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, + struct netdev_phys_item_id *b) +{ + return a->id_len == b->id_len && + memcmp(a->id, b->id, a->id_len) == 0; +} + +typedef u16 (*select_queue_fallback_t)(struct net_device *dev, + struct sk_buff *skb, + struct net_device *sb_dev); + +enum net_device_path_type { + DEV_PATH_ETHERNET = 0, + DEV_PATH_VLAN, + DEV_PATH_BRIDGE, + DEV_PATH_PPPOE, + DEV_PATH_DSA, + DEV_PATH_MTK_WDMA, + DEV_PATH_TUN, +}; + +struct net_device_path { + enum net_device_path_type type; + const struct net_device *dev; + union { + struct { + u16 id; + __be16 proto; + u8 h_dest[ETH_ALEN]; + } encap; + struct { + union { + struct in_addr src_v4; + struct in6_addr src_v6; + }; + union { + struct in_addr dst_v4; + struct in6_addr dst_v6; + }; + + u8 l3_proto; + } tun; + struct { + enum { + DEV_PATH_BR_VLAN_KEEP, + DEV_PATH_BR_VLAN_TAG, + DEV_PATH_BR_VLAN_UNTAG, + DEV_PATH_BR_VLAN_UNTAG_HW, + } vlan_mode; + u16 vlan_id; + __be16 vlan_proto; + } bridge; + struct { + int port; + u16 proto; + } dsa; + struct { + u8 wdma_idx; + u8 queue; + u16 wcid; + u8 bss; + u8 amsdu; + } mtk_wdma; + }; +}; + +#define NET_DEVICE_PATH_STACK_MAX 5 +#define NET_DEVICE_PATH_VLAN_MAX 2 + +struct net_device_path_stack { + int num_paths; + struct net_device_path path[NET_DEVICE_PATH_STACK_MAX]; +}; + +struct net_device_path_ctx { + const struct net_device *dev; + u8 daddr[ETH_ALEN]; + + int num_vlans; + struct { + u16 id; + __be16 proto; + } vlan[NET_DEVICE_PATH_VLAN_MAX]; +}; + +enum tc_setup_type { + TC_QUERY_CAPS, + TC_SETUP_QDISC_MQPRIO, + TC_SETUP_CLSU32, + TC_SETUP_CLSFLOWER, + TC_SETUP_CLSMATCHALL, + TC_SETUP_CLSBPF, + TC_SETUP_BLOCK, + TC_SETUP_QDISC_CBS, + TC_SETUP_QDISC_RED, + TC_SETUP_QDISC_PRIO, + TC_SETUP_QDISC_MQ, + TC_SETUP_QDISC_ETF, + TC_SETUP_ROOT_QDISC, + TC_SETUP_QDISC_GRED, + TC_SETUP_QDISC_TAPRIO, + TC_SETUP_FT, + TC_SETUP_QDISC_ETS, + TC_SETUP_QDISC_TBF, + TC_SETUP_QDISC_FIFO, + TC_SETUP_QDISC_HTB, + TC_SETUP_ACT, +}; + +/* These structures hold the attributes of bpf state that are being passed + * to the netdevice through the bpf op. + */ +enum bpf_netdev_command { + /* Set or clear a bpf program used in the earliest stages of packet + * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee + * is responsible for calling bpf_prog_put on any old progs that are + * stored. In case of error, the callee need not release the new prog + * reference, but on success it takes ownership and must bpf_prog_put + * when it is no longer used. + */ + XDP_SETUP_PROG, + XDP_SETUP_PROG_HW, + /* BPF program for offload callbacks, invoked at program load time. */ + BPF_OFFLOAD_MAP_ALLOC, + BPF_OFFLOAD_MAP_FREE, + XDP_SETUP_XSK_POOL, +}; + +struct bpf_prog_offload_ops; +struct netlink_ext_ack; +struct xdp_umem; +struct xdp_dev_bulk_queue; +struct bpf_xdp_link; + +enum bpf_xdp_mode { + XDP_MODE_SKB = 0, + XDP_MODE_DRV = 1, + XDP_MODE_HW = 2, + __MAX_XDP_MODE +}; + +struct bpf_xdp_entity { + struct bpf_prog *prog; + struct bpf_xdp_link *link; +}; + +struct netdev_bpf { + enum bpf_netdev_command command; + union { + /* XDP_SETUP_PROG */ + struct { + u32 flags; + struct bpf_prog *prog; + struct netlink_ext_ack *extack; + }; + /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */ + struct { + struct bpf_offloaded_map *offmap; + }; + /* XDP_SETUP_XSK_POOL */ + struct { + struct xsk_buff_pool *pool; + u16 queue_id; + } xsk; + }; +}; + +/* Flags for ndo_xsk_wakeup. */ +#define XDP_WAKEUP_RX (1 << 0) +#define XDP_WAKEUP_TX (1 << 1) + +#ifdef CONFIG_XFRM_OFFLOAD +struct xfrmdev_ops { + int (*xdo_dev_state_add)(struct net_device *dev, + struct xfrm_state *x, + struct netlink_ext_ack *extack); + void (*xdo_dev_state_delete)(struct net_device *dev, + struct xfrm_state *x); + void (*xdo_dev_state_free)(struct net_device *dev, + struct xfrm_state *x); + bool (*xdo_dev_offload_ok) (struct sk_buff *skb, + struct xfrm_state *x); + void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); + void (*xdo_dev_state_update_stats) (struct xfrm_state *x); + int (*xdo_dev_policy_add) (struct xfrm_policy *x, struct netlink_ext_ack *extack); + void (*xdo_dev_policy_delete) (struct xfrm_policy *x); + void (*xdo_dev_policy_free) (struct xfrm_policy *x); +}; +#endif + +struct dev_ifalias { + struct rcu_head rcuhead; + char ifalias[]; +}; + +struct devlink; +struct tlsdev_ops; + +struct netdev_net_notifier { + struct list_head list; + struct notifier_block *nb; +}; + /* * This structure defines the management hooks for network devices. * The following hooks can be defined; unless noted otherwise, they are * optional and can be filled with a null pointer. * * int (*ndo_init)(struct net_device *dev); - * This function is called once when network device is registered. - * The network device can use this to any late stage initializaton - * or semantic validattion. It can fail with an error code which will - * be propogated back to register_netdev + * This function is called once when a network device is registered. + * The network device can use this for any late stage initialization + * or semantic validation. It can fail with an error code which will + * be propagated back to register_netdev. * * void (*ndo_uninit)(struct net_device *dev); * This function is called when device is unregistered or when registration * fails. It is not called if init fails. * * int (*ndo_open)(struct net_device *dev); - * This function is called when network device transistions to the up + * This function is called when a network device transitions to the up * state. * * int (*ndo_stop)(struct net_device *dev); - * This function is called when network device transistions to the down + * This function is called when a network device transitions to the down * state. * * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, * struct net_device *dev); * Called when a packet needs to be transmitted. - * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. - * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) - * Required can not be NULL. + * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop + * the queue before that can happen; it's for obsolete devices and weird + * corner cases, but the stack really does a non-trivial amount + * of useless work if you return NETDEV_TX_BUSY. + * Required; cannot be NULL. * - * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); - * Called to decide which queue to when device supports multiple + * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, + * struct net_device *dev + * netdev_features_t features); + * Called by core transmit path to determine if device is capable of + * performing offload operations on a given packet. This is to give + * the device an opportunity to implement any restrictions that cannot + * be otherwise expressed by feature flags. The check is called with + * the set of features that the stack has calculated and it returns + * those the driver believes to be appropriate. + * + * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, + * struct net_device *sb_dev); + * Called to decide which queue to use when device supports multiple * transmit queues. * * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); * This function is called to allow device receiver to make - * changes to configuration when multicast or promiscious is enabled. + * changes to configuration when multicast or promiscuous is enabled. * * void (*ndo_set_rx_mode)(struct net_device *dev); * This function is called device changes address list filtering. * If driver handles unicast address filtering, it should set - * IFF_UNICAST_FLT to its priv_flags. + * IFF_UNICAST_FLT in its priv_flags. * * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); * This function is called when the Media Access Control address * needs to be changed. If this interface is not defined, the - * mac address can not be changed. + * MAC address can not be changed. * * int (*ndo_validate_addr)(struct net_device *dev); * Test if Media Access Control address is valid for the device. * * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); - * Called when a user request an ioctl which can't be handled by - * the generic interface code. If not defined ioctl's return - * not supported error code. + * Old-style ioctl entry point. This is used internally by the + * ieee802154 subsystem but is no longer called by the device + * ioctl handler. + * + * int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd); + * Used by the bonding driver for its device specific ioctls: + * SIOCBONDENSLAVE, SIOCBONDRELEASE, SIOCBONDSETHWADDR, SIOCBONDCHANGEACTIVE, + * SIOCBONDSLAVEINFOQUERY, and SIOCBONDINFOQUERY + * + * * int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); + * Called for ethernet specific ioctls: SIOCGMIIPHY, SIOCGMIIREG, + * SIOCSMIIREG, SIOCSHWTSTAMP and SIOCGHWTSTAMP. * * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); * Used to set network devices bus interface parameters. This interface - * is retained for legacy reason, new devices should use the bus + * is retained for legacy reasons; new devices should use the bus * interface (PCI) for low level management. * * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); * Called when a user wants to change the Maximum Transfer Unit - * of a device. If not defined, any request to change MTU will - * will return an error. + * of a device. * - * void (*ndo_tx_timeout)(struct net_device *dev); - * Callback uses when the transmitter has not made any progress + * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue); + * Callback used when the transmitter has not made any progress * for dev->watchdog ticks. * - * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, - * struct rtnl_link_stats64 *storage); + * void (*ndo_get_stats64)(struct net_device *dev, + * struct rtnl_link_stats64 *storage); * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); * Called when a user wants to get the network device usage * statistics. Drivers must do one of the following: @@ -812,32 +1167,49 @@ struct netdev_fcoe_hbainfo { * 3. Update dev->stats asynchronously and atomically, and define * neither operation. * - * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); - * If device support VLAN filtering this function is called when a + * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) + * Return true if this device supports offload stats of this attr_id. + * + * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, + * void *attr_data) + * Get statistics for offload operations by attr_id. Write it into the + * attr_data pointer. + * + * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); + * If device supports VLAN filtering this function is called when a * VLAN id is registered. * - * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); - * If device support VLAN filtering this function is called when a + * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); + * If device supports VLAN filtering this function is called when a * VLAN id is unregistered. * * void (*ndo_poll_controller)(struct net_device *dev); * * SR-IOV management functions. * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); - * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); - * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); + * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, + * u8 qos, __be16 proto); + * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, + * int max_tx_rate); * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); + * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); * int (*ndo_get_vf_config)(struct net_device *dev, * int vf, struct ifla_vf_info *ivf); * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); * int (*ndo_set_vf_port)(struct net_device *dev, int vf, * struct nlattr *port[]); + * + * Enable or disable the VF ability to query its RSS Redirection Table and + * Hash Key. This is needed since on some devices VF share this information + * with PF and querying it may introduce a theoretical security risk. + * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); - * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) - * Called to setup 'tc' number of traffic classes in the net device. This - * is always called from the stack with the rtnl lock held and netif tx - * queues stopped. This allows the netdevice to perform queue management - * safely. + * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, + * void *type_data); + * Called to setup any 'tc' scheduler, classifier or action on @dev. + * This is always called from the stack with the rtnl lock held and netif + * tx queues stopped. This allows the netdevice to perform queue + * management safely. * * Fiber Channel over Ethernet (FCoE) offload functions. * int (*ndo_fcoe_enable)(struct net_device *dev); @@ -896,6 +1268,12 @@ struct netdev_fcoe_hbainfo { * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); * Called to release previously enslaved netdev. * + * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev, + * struct sk_buff *skb, + * bool all_slaves); + * Get the xmit slave of master device. If all_slaves is true, function + * assume all the slaves can transmit. + * * Feature/offload setting functions. * netdev_features_t (*ndo_fix_features)(struct net_device *dev, * netdev_features_t features); @@ -910,20 +1288,47 @@ struct netdev_fcoe_hbainfo { * * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], * struct net_device *dev, - * const unsigned char *addr, u16 flags) + * const unsigned char *addr, u16 vid, u16 flags, + * bool *notified, struct netlink_ext_ack *extack); * Adds an FDB entry to dev for addr. + * Callee shall set *notified to true if it sent any appropriate + * notification(s). Otherwise core will send a generic one. * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], * struct net_device *dev, - * const unsigned char *addr) - * Deletes the FDB entry from dev coresponding to addr. + * const unsigned char *addr, u16 vid + * bool *notified, struct netlink_ext_ack *extack); + * Deletes the FDB entry from dev corresponding to addr. + * Callee shall set *notified to true if it sent any appropriate + * notification(s). Otherwise core will send a generic one. + * int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh, struct net_device *dev, + * struct netlink_ext_ack *extack); * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, - * struct net_device *dev, int idx) + * struct net_device *dev, struct net_device *filter_dev, + * int *idx) * Used to add FDB entries to dump requests. Implementers should add * entries to skb and update idx with the number of entries. * - * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh) + * int (*ndo_mdb_add)(struct net_device *dev, struct nlattr *tb[], + * u16 nlmsg_flags, struct netlink_ext_ack *extack); + * Adds an MDB entry to dev. + * int (*ndo_mdb_del)(struct net_device *dev, struct nlattr *tb[], + * struct netlink_ext_ack *extack); + * Deletes the MDB entry from dev. + * int (*ndo_mdb_del_bulk)(struct net_device *dev, struct nlattr *tb[], + * struct netlink_ext_ack *extack); + * Bulk deletes MDB entries from dev. + * int (*ndo_mdb_dump)(struct net_device *dev, struct sk_buff *skb, + * struct netlink_callback *cb); + * Dumps MDB entries from dev. The first argument (marker) in the netlink + * callback is used by core rtnetlink code. + * + * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, + * u16 flags, struct netlink_ext_ack *extack) * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, - * struct net_device *dev, u32 filter_mask) + * struct net_device *dev, u32 filter_mask, + * int nlflags) + * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, + * u16 flags); * * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); * Called to change device carrier. Soft-devices (like dummy, team, etc) @@ -932,16 +1337,103 @@ struct netdev_fcoe_hbainfo { * that determine carrier state from physical hardware properties (eg * network cables) or protocol-dependent mechanisms (eg * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. + * + * int (*ndo_get_phys_port_id)(struct net_device *dev, + * struct netdev_phys_item_id *ppid); + * Called to get ID of physical port of this device. If driver does + * not implement this, it is assumed that the hw is not able to have + * multiple net devices on single physical port. + * + * int (*ndo_get_port_parent_id)(struct net_device *dev, + * struct netdev_phys_item_id *ppid) + * Called to get the parent ID of the physical port of this device. + * + * void* (*ndo_dfwd_add_station)(struct net_device *pdev, + * struct net_device *dev) + * Called by upper layer devices to accelerate switching or other + * station functionality into hardware. 'pdev is the lowerdev + * to use for the offload and 'dev' is the net device that will + * back the offload. Returns a pointer to the private structure + * the upper layer will maintain. + * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) + * Called by upper layer device to delete the station created + * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing + * the station and priv is the structure returned by the add + * operation. + * int (*ndo_set_tx_maxrate)(struct net_device *dev, + * int queue_index, u32 maxrate); + * Called when a user wants to set a max-rate limitation of specific + * TX queue. + * int (*ndo_get_iflink)(const struct net_device *dev); + * Called to get the iflink value of this device. + * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); + * This function is used to get egress tunnel information for given skb. + * This is useful for retrieving outer tunnel header parameters while + * sampling packet. + * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); + * This function is used to specify the headroom that the skb must + * consider when allocation skb during packet reception. Setting + * appropriate rx headroom value allows avoiding skb head copy on + * forward. Setting a negative value resets the rx headroom to the + * default value. + * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf); + * This function is used to set or query state related to XDP on the + * netdevice and manage BPF offload. See definition of + * enum bpf_netdev_command for details. + * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp, + * u32 flags); + * This function is used to submit @n XDP packets for transmit on a + * netdevice. Returns number of frames successfully transmitted, frames + * that got dropped are freed/returned via xdp_return_frame(). + * Returns negative number, means general error invoking ndo, meaning + * no frames were xmit'ed and core-caller will free all frames. + * struct net_device *(*ndo_xdp_get_xmit_slave)(struct net_device *dev, + * struct xdp_buff *xdp); + * Get the xmit slave of master device based on the xdp_buff. + * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags); + * This function is used to wake up the softirq, ksoftirqd or kthread + * responsible for sending and/or receiving packets on a specific + * queue id bound to an AF_XDP socket. The flags field specifies if + * only RX, only Tx, or both should be woken up using the flags + * XDP_WAKEUP_RX and XDP_WAKEUP_TX. + * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm_kern *p, + * int cmd); + * Add, change, delete or get information on an IPv4 tunnel. + * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev); + * If a device is paired with a peer device, return the peer instance. + * The caller must be under RCU read context. + * int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path); + * Get the forwarding path to reach the real device from the HW destination address + * ktime_t (*ndo_get_tstamp)(struct net_device *dev, + * const struct skb_shared_hwtstamps *hwtstamps, + * bool cycles); + * Get hardware timestamp based on normal/adjustable time or free running + * cycle counter. This function is required if physical clock supports a + * free running cycle counter. + * + * int (*ndo_hwtstamp_get)(struct net_device *dev, + * struct kernel_hwtstamp_config *kernel_config); + * Get the currently configured hardware timestamping parameters for the + * NIC device. + * + * int (*ndo_hwtstamp_set)(struct net_device *dev, + * struct kernel_hwtstamp_config *kernel_config, + * struct netlink_ext_ack *extack); + * Change the hardware timestamping parameters for NIC device. */ struct net_device_ops { int (*ndo_init)(struct net_device *dev); void (*ndo_uninit)(struct net_device *dev); int (*ndo_open)(struct net_device *dev); int (*ndo_stop)(struct net_device *dev); - netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, - struct net_device *dev); + netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, + struct net_device *dev); + netdev_features_t (*ndo_features_check)(struct sk_buff *skb, + struct net_device *dev, + netdev_features_t features); u16 (*ndo_select_queue)(struct net_device *dev, - struct sk_buff *skb); + struct sk_buff *skb, + struct net_device *sb_dev); void (*ndo_change_rx_flags)(struct net_device *dev, int flags); void (*ndo_set_rx_mode)(struct net_device *dev); @@ -950,16 +1442,30 @@ struct net_device_ops { int (*ndo_validate_addr)(struct net_device *dev); int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); + int (*ndo_eth_ioctl)(struct net_device *dev, + struct ifreq *ifr, int cmd); + int (*ndo_siocbond)(struct net_device *dev, + struct ifreq *ifr, int cmd); + int (*ndo_siocwandev)(struct net_device *dev, + struct if_settings *ifs); + int (*ndo_siocdevprivate)(struct net_device *dev, + struct ifreq *ifr, + void __user *data, int cmd); int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); int (*ndo_neigh_setup)(struct net_device *dev, struct neigh_parms *); - void (*ndo_tx_timeout) (struct net_device *dev); - - struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, - struct rtnl_link_stats64 *storage); + void (*ndo_tx_timeout) (struct net_device *dev, + unsigned int txqueue); + + void (*ndo_get_stats64)(struct net_device *dev, + struct rtnl_link_stats64 *storage); + bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); + int (*ndo_get_offload_stats)(int attr_id, + const struct net_device *dev, + void *attr_data); struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); int (*ndo_vlan_rx_add_vid)(struct net_device *dev, @@ -968,33 +1474,48 @@ struct net_device_ops { __be16 proto, u16 vid); #ifdef CONFIG_NET_POLL_CONTROLLER void (*ndo_poll_controller)(struct net_device *dev); - int (*ndo_netpoll_setup)(struct net_device *dev, - struct netpoll_info *info, - gfp_t gfp); + int (*ndo_netpoll_setup)(struct net_device *dev); void (*ndo_netpoll_cleanup)(struct net_device *dev); #endif -#ifdef CONFIG_NET_LL_RX_POLL - int (*ndo_busy_poll)(struct napi_struct *dev); -#endif int (*ndo_set_vf_mac)(struct net_device *dev, int queue, u8 *mac); int (*ndo_set_vf_vlan)(struct net_device *dev, - int queue, u16 vlan, u8 qos); - int (*ndo_set_vf_tx_rate)(struct net_device *dev, - int vf, int rate); + int queue, u16 vlan, + u8 qos, __be16 proto); + int (*ndo_set_vf_rate)(struct net_device *dev, + int vf, int min_tx_rate, + int max_tx_rate); int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); + int (*ndo_set_vf_trust)(struct net_device *dev, + int vf, bool setting); int (*ndo_get_vf_config)(struct net_device *dev, int vf, struct ifla_vf_info *ivf); int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); + int (*ndo_get_vf_stats)(struct net_device *dev, + int vf, + struct ifla_vf_stats + *vf_stats); int (*ndo_set_vf_port)(struct net_device *dev, int vf, struct nlattr *port[]); int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); - int (*ndo_setup_tc)(struct net_device *dev, u8 tc); + int (*ndo_get_vf_guid)(struct net_device *dev, + int vf, + struct ifla_vf_guid *node_guid, + struct ifla_vf_guid *port_guid); + int (*ndo_set_vf_guid)(struct net_device *dev, + int vf, u64 guid, + int guid_type); + int (*ndo_set_vf_rss_query_en)( + struct net_device *dev, + int vf, bool setting); + int (*ndo_setup_tc)(struct net_device *dev, + enum tc_setup_type type, + void *type_data); #if IS_ENABLED(CONFIG_FCOE) int (*ndo_fcoe_enable)(struct net_device *dev); int (*ndo_fcoe_disable)(struct net_device *dev); @@ -1026,357 +1547,1057 @@ struct net_device_ops { u32 flow_id); #endif int (*ndo_add_slave)(struct net_device *dev, - struct net_device *slave_dev); + struct net_device *slave_dev, + struct netlink_ext_ack *extack); int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); + struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev, + struct sk_buff *skb, + bool all_slaves); + struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev, + struct sock *sk); netdev_features_t (*ndo_fix_features)(struct net_device *dev, netdev_features_t features); int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); - int (*ndo_neigh_construct)(struct neighbour *n); - void (*ndo_neigh_destroy)(struct neighbour *n); + int (*ndo_neigh_construct)(struct net_device *dev, + struct neighbour *n); + void (*ndo_neigh_destroy)(struct net_device *dev, + struct neighbour *n); int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr, - u16 flags); + u16 vid, + u16 flags, + bool *notified, + struct netlink_ext_ack *extack); int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, - const unsigned char *addr); + const unsigned char *addr, + u16 vid, + bool *notified, + struct netlink_ext_ack *extack); + int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh, + struct net_device *dev, + struct netlink_ext_ack *extack); int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev, - int idx); - + struct net_device *filter_dev, + int *idx); + int (*ndo_fdb_get)(struct sk_buff *skb, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 vid, u32 portid, u32 seq, + struct netlink_ext_ack *extack); + int (*ndo_mdb_add)(struct net_device *dev, + struct nlattr *tb[], + u16 nlmsg_flags, + struct netlink_ext_ack *extack); + int (*ndo_mdb_del)(struct net_device *dev, + struct nlattr *tb[], + struct netlink_ext_ack *extack); + int (*ndo_mdb_del_bulk)(struct net_device *dev, + struct nlattr *tb[], + struct netlink_ext_ack *extack); + int (*ndo_mdb_dump)(struct net_device *dev, + struct sk_buff *skb, + struct netlink_callback *cb); + int (*ndo_mdb_get)(struct net_device *dev, + struct nlattr *tb[], u32 portid, + u32 seq, + struct netlink_ext_ack *extack); int (*ndo_bridge_setlink)(struct net_device *dev, - struct nlmsghdr *nlh); + struct nlmsghdr *nlh, + u16 flags, + struct netlink_ext_ack *extack); int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, - u32 filter_mask); + u32 filter_mask, + int nlflags); int (*ndo_bridge_dellink)(struct net_device *dev, - struct nlmsghdr *nlh); + struct nlmsghdr *nlh, + u16 flags); int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); + int (*ndo_get_phys_port_id)(struct net_device *dev, + struct netdev_phys_item_id *ppid); + int (*ndo_get_port_parent_id)(struct net_device *dev, + struct netdev_phys_item_id *ppid); + int (*ndo_get_phys_port_name)(struct net_device *dev, + char *name, size_t len); + void* (*ndo_dfwd_add_station)(struct net_device *pdev, + struct net_device *dev); + void (*ndo_dfwd_del_station)(struct net_device *pdev, + void *priv); + + int (*ndo_set_tx_maxrate)(struct net_device *dev, + int queue_index, + u32 maxrate); + int (*ndo_get_iflink)(const struct net_device *dev); + int (*ndo_fill_metadata_dst)(struct net_device *dev, + struct sk_buff *skb); + void (*ndo_set_rx_headroom)(struct net_device *dev, + int needed_headroom); + int (*ndo_bpf)(struct net_device *dev, + struct netdev_bpf *bpf); + int (*ndo_xdp_xmit)(struct net_device *dev, int n, + struct xdp_frame **xdp, + u32 flags); + struct net_device * (*ndo_xdp_get_xmit_slave)(struct net_device *dev, + struct xdp_buff *xdp); + int (*ndo_xsk_wakeup)(struct net_device *dev, + u32 queue_id, u32 flags); + int (*ndo_tunnel_ctl)(struct net_device *dev, + struct ip_tunnel_parm_kern *p, + int cmd); + struct net_device * (*ndo_get_peer_dev)(struct net_device *dev); + int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, + struct net_device_path *path); + ktime_t (*ndo_get_tstamp)(struct net_device *dev, + const struct skb_shared_hwtstamps *hwtstamps, + bool cycles); + int (*ndo_hwtstamp_get)(struct net_device *dev, + struct kernel_hwtstamp_config *kernel_config); + int (*ndo_hwtstamp_set)(struct net_device *dev, + struct kernel_hwtstamp_config *kernel_config, + struct netlink_ext_ack *extack); + +#if IS_ENABLED(CONFIG_NET_SHAPER) + /** + * @net_shaper_ops: Device shaping offload operations + * see include/net/net_shapers.h + */ + const struct net_shaper_ops *net_shaper_ops; +#endif }; -/* - * The DEVICE structure. +/** + * enum netdev_priv_flags - &struct net_device priv_flags + * + * These are the &struct net_device, they are only set internally + * by drivers and used in the kernel. These flags are invisible to + * userspace; this means that the order of these flags can change + * during any kernel release. + * + * You should add bitfield booleans after either net_device::priv_flags + * (hotpath) or ::threaded (slowpath) instead of extending these flags. + * + * @IFF_802_1Q_VLAN: 802.1Q VLAN device + * @IFF_EBRIDGE: Ethernet bridging device + * @IFF_BONDING: bonding master or slave + * @IFF_ISATAP: ISATAP interface (RFC4214) + * @IFF_WAN_HDLC: WAN HDLC device + * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to + * release skb->dst + * @IFF_DONT_BRIDGE: disallow bridging this ether dev + * @IFF_DISABLE_NETPOLL: disable netpoll at run-time + * @IFF_MACVLAN_PORT: device used as macvlan port + * @IFF_BRIDGE_PORT: device used as bridge port + * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port + * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit + * @IFF_UNICAST_FLT: Supports unicast filtering + * @IFF_TEAM_PORT: device used as team port + * @IFF_SUPP_NOFCS: device supports sending custom FCS + * @IFF_LIVE_ADDR_CHANGE: device supports hardware address + * change when it's running + * @IFF_MACVLAN: Macvlan device + * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account + * underlying stacked devices + * @IFF_L3MDEV_MASTER: device is an L3 master device + * @IFF_NO_QUEUE: device can run without qdisc attached + * @IFF_OPENVSWITCH: device is a Open vSwitch master + * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device + * @IFF_TEAM: device is a team device + * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured + * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external + * entity (i.e. the master device for bridged veth) + * @IFF_MACSEC: device is a MACsec device + * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook + * @IFF_FAILOVER: device is a failover master device + * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device + * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device + * @IFF_NO_ADDRCONF: prevent ipv6 addrconf + * @IFF_TX_SKB_NO_LINEAR: device/driver is capable of xmitting frames with + * skb_headlen(skb) == 0 (data starts from frag0) + */ +enum netdev_priv_flags { + IFF_802_1Q_VLAN = 1<<0, + IFF_EBRIDGE = 1<<1, + IFF_BONDING = 1<<2, + IFF_ISATAP = 1<<3, + IFF_WAN_HDLC = 1<<4, + IFF_XMIT_DST_RELEASE = 1<<5, + IFF_DONT_BRIDGE = 1<<6, + IFF_DISABLE_NETPOLL = 1<<7, + IFF_MACVLAN_PORT = 1<<8, + IFF_BRIDGE_PORT = 1<<9, + IFF_OVS_DATAPATH = 1<<10, + IFF_TX_SKB_SHARING = 1<<11, + IFF_UNICAST_FLT = 1<<12, + IFF_TEAM_PORT = 1<<13, + IFF_SUPP_NOFCS = 1<<14, + IFF_LIVE_ADDR_CHANGE = 1<<15, + IFF_MACVLAN = 1<<16, + IFF_XMIT_DST_RELEASE_PERM = 1<<17, + IFF_L3MDEV_MASTER = 1<<18, + IFF_NO_QUEUE = 1<<19, + IFF_OPENVSWITCH = 1<<20, + IFF_L3MDEV_SLAVE = 1<<21, + IFF_TEAM = 1<<22, + IFF_RXFH_CONFIGURED = 1<<23, + IFF_PHONY_HEADROOM = 1<<24, + IFF_MACSEC = 1<<25, + IFF_NO_RX_HANDLER = 1<<26, + IFF_FAILOVER = 1<<27, + IFF_FAILOVER_SLAVE = 1<<28, + IFF_L3MDEV_RX_HANDLER = 1<<29, + IFF_NO_ADDRCONF = BIT_ULL(30), + IFF_TX_SKB_NO_LINEAR = BIT_ULL(31), +}; + +/* Specifies the type of the struct net_device::ml_priv pointer */ +enum netdev_ml_priv_type { + ML_PRIV_NONE, + ML_PRIV_CAN, +}; + +enum netdev_stat_type { + NETDEV_PCPU_STAT_NONE, + NETDEV_PCPU_STAT_LSTATS, /* struct pcpu_lstats */ + NETDEV_PCPU_STAT_TSTATS, /* struct pcpu_sw_netstats */ + NETDEV_PCPU_STAT_DSTATS, /* struct pcpu_dstats */ +}; + +enum netdev_reg_state { + NETREG_UNINITIALIZED = 0, + NETREG_REGISTERED, /* completed register_netdevice */ + NETREG_UNREGISTERING, /* called unregister_netdevice */ + NETREG_UNREGISTERED, /* completed unregister todo */ + NETREG_RELEASED, /* called free_netdev */ + NETREG_DUMMY, /* dummy device for NAPI poll */ +}; + +/** + * struct net_device - The DEVICE structure. + * * Actually, this whole structure is a big mistake. It mixes I/O * data with strictly "high-level" data, and it has to know about * almost every data structure used in the INET module. * + * @priv_flags: flags invisible to userspace defined as bits, see + * enum netdev_priv_flags for the definitions + * @lltx: device supports lockless Tx. Deprecated for real HW + * drivers. Mainly used by logical interfaces, such as + * bonding and tunnels + * @netmem_tx: device support netmem_tx. + * + * @name: This is the first field of the "visible" part of this structure + * (i.e. as seen by users in the "Space.c" file). It is the name + * of the interface. + * + * @name_node: Name hashlist node + * @ifalias: SNMP alias + * @mem_end: Shared memory end + * @mem_start: Shared memory start + * @base_addr: Device I/O address + * @irq: Device IRQ number + * + * @state: Generic network queuing layer state, see netdev_state_t + * @dev_list: The global list of network devices + * @napi_list: List entry used for polling NAPI devices + * @unreg_list: List entry when we are unregistering the + * device; see the function unregister_netdev + * @close_list: List entry used when we are closing the device + * @ptype_all: Device-specific packet handlers for all protocols + * @ptype_specific: Device-specific, protocol-specific packet handlers + * + * @adj_list: Directly linked devices, like slaves for bonding + * @features: Currently active device features + * @hw_features: User-changeable features + * + * @wanted_features: User-requested features + * @vlan_features: Mask of features inheritable by VLAN devices + * + * @hw_enc_features: Mask of features inherited by encapsulating devices + * This field indicates what encapsulation + * offloads the hardware is capable of doing, + * and drivers will need to set them appropriately. + * + * @mpls_features: Mask of features inheritable by MPLS + * @gso_partial_features: value(s) from NETIF_F_GSO\* + * + * @ifindex: interface index + * @group: The group the device belongs to + * + * @stats: Statistics struct, which was left as a legacy, use + * rtnl_link_stats64 instead + * + * @core_stats: core networking counters, + * do not use this in drivers + * @carrier_up_count: Number of times the carrier has been up + * @carrier_down_count: Number of times the carrier has been down + * + * @wireless_handlers: List of functions to handle Wireless Extensions, + * instead of ioctl, + * see <net/iw_handler.h> for details. + * + * @netdev_ops: Includes several pointers to callbacks, + * if one wants to override the ndo_*() functions + * @xdp_metadata_ops: Includes pointers to XDP metadata callbacks. + * @xsk_tx_metadata_ops: Includes pointers to AF_XDP TX metadata callbacks. + * @ethtool_ops: Management operations + * @l3mdev_ops: Layer 3 master device operations + * @ndisc_ops: Includes callbacks for different IPv6 neighbour + * discovery handling. Necessary for e.g. 6LoWPAN. + * @xfrmdev_ops: Transformation offload operations + * @tlsdev_ops: Transport Layer Security offload operations + * @header_ops: Includes callbacks for creating,parsing,caching,etc + * of Layer 2 headers. + * + * @flags: Interface flags (a la BSD) + * @xdp_features: XDP capability supported by the device + * @gflags: Global flags ( kept as legacy ) + * @priv_len: Size of the ->priv flexible array + * @priv: Flexible array containing private data + * @operstate: RFC2863 operstate + * @link_mode: Mapping policy to operstate + * @if_port: Selectable AUI, TP, ... + * @dma: DMA channel + * @mtu: Interface MTU value + * @min_mtu: Interface Minimum MTU value + * @max_mtu: Interface Maximum MTU value + * @type: Interface hardware type + * @hard_header_len: Maximum hardware header length. + * @min_header_len: Minimum hardware header length + * + * @needed_headroom: Extra headroom the hardware may need, but not in all + * cases can this be guaranteed + * @needed_tailroom: Extra tailroom the hardware may need, but not in all + * cases can this be guaranteed. Some cases also use + * LL_MAX_HEADER instead to allocate the skb + * + * interface address info: + * + * @perm_addr: Permanent hw address + * @addr_assign_type: Hw address assignment type + * @addr_len: Hardware address length + * @upper_level: Maximum depth level of upper devices. + * @lower_level: Maximum depth level of lower devices. + * @threaded: napi threaded state. + * @neigh_priv_len: Used in neigh_alloc() + * @dev_id: Used to differentiate devices that share + * the same link layer address + * @dev_port: Used to differentiate devices that share + * the same function + * @addr_list_lock: XXX: need comments on this one + * @name_assign_type: network interface name assignment type + * @uc_promisc: Counter that indicates promiscuous mode + * has been enabled due to the need to listen to + * additional unicast addresses in a device that + * does not implement ndo_set_rx_mode() + * @uc: unicast mac addresses + * @mc: multicast mac addresses + * @dev_addrs: list of device hw addresses + * @queues_kset: Group of all Kobjects in the Tx and RX queues + * @promiscuity: Number of times the NIC is told to work in + * promiscuous mode; if it becomes 0 the NIC will + * exit promiscuous mode + * @allmulti: Counter, enables or disables allmulticast mode + * + * @vlan_info: VLAN info + * @dsa_ptr: dsa specific data + * @tipc_ptr: TIPC specific data + * @atalk_ptr: AppleTalk link + * @ip_ptr: IPv4 specific data + * @ip6_ptr: IPv6 specific data + * @ax25_ptr: AX.25 specific data + * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering + * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network + * device struct + * @mpls_ptr: mpls_dev struct pointer + * @mctp_ptr: MCTP specific data + * @psp_dev: PSP crypto device registered for this netdev + * + * @dev_addr: Hw address (before bcast, + * because most packets are unicast) + * + * @_rx: Array of RX queues + * @num_rx_queues: Number of RX queues + * allocated at register_netdev() time + * @real_num_rx_queues: Number of RX queues currently active in device + * @xdp_prog: XDP sockets filter program pointer + * + * @rx_handler: handler for received packets + * @rx_handler_data: XXX: need comments on this one + * @tcx_ingress: BPF & clsact qdisc specific data for ingress processing + * @ingress_queue: XXX: need comments on this one + * @nf_hooks_ingress: netfilter hooks executed for ingress packets + * @broadcast: hw bcast address + * + * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, + * indexed by RX queue number. Assigned by driver. + * This must only be set if the ndo_rx_flow_steer + * operation is defined + * @index_hlist: Device index hash chain + * + * @_tx: Array of TX queues + * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time + * @real_num_tx_queues: Number of TX queues currently active in device + * @qdisc: Root qdisc from userspace point of view + * @tx_queue_len: Max frames per queue allowed + * @tx_global_lock: XXX: need comments on this one + * @xdp_bulkq: XDP device bulk queue + * @xps_maps: all CPUs/RXQs maps for XPS device + * + * @xps_maps: XXX: need comments on this one + * @tcx_egress: BPF & clsact qdisc specific data for egress processing + * @nf_hooks_egress: netfilter hooks executed for egress packets + * @qdisc_hash: qdisc hash table + * @watchdog_timeo: Represents the timeout that is used by + * the watchdog (see dev_watchdog()) + * @watchdog_timer: List of timers + * + * @proto_down_reason: reason a netdev interface is held down + * @pcpu_refcnt: Number of references to this device + * @dev_refcnt: Number of references to this device + * @refcnt_tracker: Tracker directory for tracked references to this device + * @todo_list: Delayed register/unregister + * @link_watch_list: XXX: need comments on this one + * + * @reg_state: Register/unregister state machine + * @dismantle: Device is going to be freed + * @needs_free_netdev: Should unregister perform free_netdev? + * @priv_destructor: Called from unregister + * @npinfo: XXX: need comments on this one + * @nd_net: Network namespace this network device is inside + * protected by @lock + * + * @ml_priv: Mid-layer private + * @ml_priv_type: Mid-layer private type + * + * @pcpu_stat_type: Type of device statistics which the core should + * allocate/free: none, lstats, tstats, dstats. none + * means the driver is handling statistics allocation/ + * freeing internally. + * @lstats: Loopback statistics: packets, bytes + * @tstats: Tunnel statistics: RX/TX packets, RX/TX bytes + * @dstats: Dummy statistics: RX/TX/drop packets, RX/TX bytes + * + * @garp_port: GARP + * @mrp_port: MRP + * + * @dm_private: Drop monitor private + * + * @dev: Class/net/name entry + * @sysfs_groups: Space for optional device, statistics and wireless + * sysfs groups + * + * @sysfs_rx_queue_group: Space for optional per-rx queue attributes + * @rtnl_link_ops: Rtnl_link_ops + * @stat_ops: Optional ops for queue-aware statistics + * @queue_mgmt_ops: Optional ops for queue management + * + * @gso_max_size: Maximum size of generic segmentation offload + * @tso_max_size: Device (as in HW) limit on the max TSO request size + * @gso_max_segs: Maximum number of segments that can be passed to the + * NIC for GSO + * @tso_max_segs: Device (as in HW) limit on the max TSO segment count + * @gso_ipv4_max_size: Maximum size of generic segmentation offload, + * for IPv4. + * + * @dcbnl_ops: Data Center Bridging netlink ops + * @num_tc: Number of traffic classes in the net device + * @tc_to_txq: XXX: need comments on this one + * @prio_tc_map: XXX: need comments on this one + * + * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp + * + * @priomap: XXX: need comments on this one + * @link_topo: Physical link topology tracking attached PHYs + * @phydev: Physical device may attach itself + * for hardware timestamping + * @sfp_bus: attached &struct sfp_bus structure. + * + * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock + * + * @proto_down: protocol port state information can be sent to the + * switch driver and used to set the phys state of the + * switch port. + * + * @irq_affinity_auto: driver wants the core to store and re-assign the IRQ + * affinity. Set by netif_enable_irq_affinity(), then + * the driver must create a persistent napi by + * netif_napi_add_config() and finally bind the napi to + * IRQ (via netif_napi_set_irq()). + * + * @rx_cpu_rmap_auto: driver wants the core to manage the ARFS rmap. + * Set by calling netif_enable_cpu_rmap(). + * + * @see_all_hwtstamp_requests: device wants to see calls to + * ndo_hwtstamp_set() for all timestamp requests + * regardless of source, even if those aren't + * HWTSTAMP_SOURCE_NETDEV + * @change_proto_down: device supports setting carrier via IFLA_PROTO_DOWN + * @netns_immutable: interface can't change network namespaces + * @fcoe_mtu: device supports maximum FCoE MTU, 2158 bytes + * + * @net_notifier_list: List of per-net netdev notifier block + * that follow this device when it is moved + * to another network namespace. + * + * @macsec_ops: MACsec offloading ops + * + * @udp_tunnel_nic_info: static structure describing the UDP tunnel + * offload capabilities of the device + * @udp_tunnel_nic: UDP tunnel offload state + * @ethtool: ethtool related state + * @xdp_state: stores info on attached XDP BPF programs + * + * @nested_level: Used as a parameter of spin_lock_nested() of + * dev->addr_list_lock. + * @unlink_list: As netif_addr_lock() can be called recursively, + * keep a list of interfaces to be deleted. + * @gro_max_size: Maximum size of aggregated packet in generic + * receive offload (GRO) + * @gro_ipv4_max_size: Maximum size of aggregated packet in generic + * receive offload (GRO), for IPv4. + * @xdp_zc_max_segs: Maximum number of segments supported by AF_XDP + * zero copy driver + * + * @dev_addr_shadow: Copy of @dev_addr to catch direct writes. + * @linkwatch_dev_tracker: refcount tracker used by linkwatch. + * @watchdog_dev_tracker: refcount tracker used by watchdog. + * @dev_registered_tracker: tracker for reference held while + * registered + * @offload_xstats_l3: L3 HW stats for this netdevice. + * + * @devlink_port: Pointer to related devlink port structure. + * Assigned by a driver before netdev registration using + * SET_NETDEV_DEVLINK_PORT macro. This pointer is static + * during the time netdevice is registered. + * + * @dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem, + * where the clock is recovered. + * + * @max_pacing_offload_horizon: max EDT offload horizon in nsec. + * @napi_config: An array of napi_config structures containing per-NAPI + * settings. + * @num_napi_configs: number of allocated NAPI config structs, + * always >= max(num_rx_queues, num_tx_queues). + * @gro_flush_timeout: timeout for GRO layer in NAPI + * @napi_defer_hard_irqs: If not zero, provides a counter that would + * allow to avoid NIC hard IRQ, on busy queues. + * + * @neighbours: List heads pointing to this device's neighbours' + * dev_list, one per address-family. + * @hwprov: Tracks which PTP performs hardware packet time stamping. + * * FIXME: cleanup struct net_device such that network protocol info * moves out. */ struct net_device { + /* Cacheline organization can be found documented in + * Documentation/networking/net_cachelines/net_device.rst. + * Please update the document when adding new fields. + */ - /* - * This is the first field of the "visible" part of this structure - * (i.e. as seen by users in the "Space.c" file). It is the name - * of the interface. + /* TX read-mostly hotpath */ + __cacheline_group_begin(net_device_read_tx); + struct_group(priv_flags_fast, + unsigned long priv_flags:32; + unsigned long lltx:1; + unsigned long netmem_tx:1; + ); + const struct net_device_ops *netdev_ops; + const struct header_ops *header_ops; + struct netdev_queue *_tx; + netdev_features_t gso_partial_features; + unsigned int real_num_tx_queues; + unsigned int gso_max_size; + unsigned int gso_ipv4_max_size; + u16 gso_max_segs; + s16 num_tc; + /* Note : dev->mtu is often read without holding a lock. + * Writers usually hold RTNL. + * It is recommended to use READ_ONCE() to annotate the reads, + * and to use WRITE_ONCE() to annotate the writes. */ - char name[IFNAMSIZ]; + unsigned int mtu; + unsigned short needed_headroom; + struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; +#ifdef CONFIG_XPS + struct xps_dev_maps __rcu *xps_maps[XPS_MAPS_MAX]; +#endif +#ifdef CONFIG_NETFILTER_EGRESS + struct nf_hook_entries __rcu *nf_hooks_egress; +#endif +#ifdef CONFIG_NET_XGRESS + struct bpf_mprog_entry __rcu *tcx_egress; +#endif + __cacheline_group_end(net_device_read_tx); - /* device name hash chain, please keep it close to name[] */ - struct hlist_node name_hlist; + /* TXRX read-mostly hotpath */ + __cacheline_group_begin(net_device_read_txrx); + union { + struct pcpu_lstats __percpu *lstats; + struct pcpu_sw_netstats __percpu *tstats; + struct pcpu_dstats __percpu *dstats; + }; + unsigned long state; + unsigned int flags; + unsigned short hard_header_len; + netdev_features_t features; + struct inet6_dev __rcu *ip6_ptr; + __cacheline_group_end(net_device_read_txrx); - /* snmp alias */ - char *ifalias; + /* RX read-mostly hotpath */ + __cacheline_group_begin(net_device_read_rx); + struct bpf_prog __rcu *xdp_prog; + struct list_head ptype_specific; + int ifindex; + unsigned int real_num_rx_queues; + struct netdev_rx_queue *_rx; + unsigned int gro_max_size; + unsigned int gro_ipv4_max_size; + rx_handler_func_t __rcu *rx_handler; + void __rcu *rx_handler_data; + possible_net_t nd_net; +#ifdef CONFIG_NETPOLL + struct netpoll_info __rcu *npinfo; +#endif +#ifdef CONFIG_NET_XGRESS + struct bpf_mprog_entry __rcu *tcx_ingress; +#endif + __cacheline_group_end(net_device_read_rx); + char name[IFNAMSIZ]; + struct netdev_name_node *name_node; + struct dev_ifalias __rcu *ifalias; /* * I/O specific fields * FIXME: Merge these and struct ifmap into one */ - unsigned long mem_end; /* shared mem end */ - unsigned long mem_start; /* shared mem start */ - unsigned long base_addr; /* device I/O address */ - unsigned int irq; /* device IRQ number */ + unsigned long mem_end; + unsigned long mem_start; + unsigned long base_addr; /* - * Some hardware also needs these fields, but they are not + * Some hardware also needs these fields (state,dev_list, + * napi_list,unreg_list,close_list) but they are not * part of the usual set specified in Space.c. */ - unsigned long state; struct list_head dev_list; struct list_head napi_list; struct list_head unreg_list; - struct list_head upper_dev_list; /* List of upper devices */ + struct list_head close_list; + struct list_head ptype_all; + + struct { + struct list_head upper; + struct list_head lower; + } adj_list; + + /* Read-mostly cache-line for fast-path access */ + xdp_features_t xdp_features; + const struct xdp_metadata_ops *xdp_metadata_ops; + const struct xsk_tx_metadata_ops *xsk_tx_metadata_ops; + unsigned short gflags; + unsigned short needed_tailroom; - /* currently active device features */ - netdev_features_t features; - /* user-changeable features */ netdev_features_t hw_features; - /* user-requested features */ netdev_features_t wanted_features; - /* mask of features inheritable by VLAN devices */ netdev_features_t vlan_features; - /* mask of features inherited by encapsulating devices - * This field indicates what encapsulation offloads - * the hardware is capable of doing, and drivers will - * need to set them appropriately. - */ netdev_features_t hw_enc_features; - /* mask of fetures inheritable by MPLS */ netdev_features_t mpls_features; - /* Interface index. Unique device identifier */ - int ifindex; - int iflink; + unsigned int min_mtu; + unsigned int max_mtu; + unsigned short type; + unsigned char min_header_len; + unsigned char name_assign_type; + + int group; + + struct net_device_stats stats; /* not used by modern drivers */ - struct net_device_stats stats; - atomic_long_t rx_dropped; /* dropped packets by core network - * Do not use this in drivers. - */ + struct net_device_core_stats __percpu *core_stats; + + /* Stats to monitor link on/off, flapping */ + atomic_t carrier_up_count; + atomic_t carrier_down_count; #ifdef CONFIG_WIRELESS_EXT - /* List of functions to handle Wireless Extensions (instead of ioctl). - * See <net/iw_handler.h> for details. Jean II */ - const struct iw_handler_def * wireless_handlers; - /* Instance data managed by the core of Wireless Extensions. */ - struct iw_public_data * wireless_data; + const struct iw_handler_def *wireless_handlers; #endif - /* Management operations */ - const struct net_device_ops *netdev_ops; const struct ethtool_ops *ethtool_ops; +#ifdef CONFIG_NET_L3_MASTER_DEV + const struct l3mdev_ops *l3mdev_ops; +#endif +#if IS_ENABLED(CONFIG_IPV6) + const struct ndisc_ops *ndisc_ops; +#endif - /* Hardware header description */ - const struct header_ops *header_ops; - - unsigned int flags; /* interface flags (a la BSD) */ - unsigned int priv_flags; /* Like 'flags' but invisible to userspace. - * See if.h for definitions. */ - unsigned short gflags; - unsigned short padded; /* How much padding added by alloc_netdev() */ +#ifdef CONFIG_XFRM_OFFLOAD + const struct xfrmdev_ops *xfrmdev_ops; +#endif - unsigned char operstate; /* RFC2863 operstate */ - unsigned char link_mode; /* mapping policy to operstate */ +#if IS_ENABLED(CONFIG_TLS_DEVICE) + const struct tlsdev_ops *tlsdev_ops; +#endif - unsigned char if_port; /* Selectable AUI, TP,..*/ - unsigned char dma; /* DMA channel */ + unsigned int operstate; + unsigned char link_mode; - unsigned int mtu; /* interface MTU value */ - unsigned short type; /* interface hardware type */ - unsigned short hard_header_len; /* hardware hdr length */ - - /* extra head- and tailroom the hardware may need, but not in all cases - * can this be guaranteed, especially tailroom. Some cases also use - * LL_MAX_HEADER instead to allocate the skb. - */ - unsigned short needed_headroom; - unsigned short needed_tailroom; + unsigned char if_port; + unsigned char dma; /* Interface address info. */ - unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ - unsigned char addr_assign_type; /* hw address assignment type */ - unsigned char addr_len; /* hardware address length */ - unsigned char neigh_priv_len; - unsigned short dev_id; /* Used to differentiate devices - * that share the same link - * layer address - */ + unsigned char perm_addr[MAX_ADDR_LEN]; + unsigned char addr_assign_type; + unsigned char addr_len; + unsigned char upper_level; + unsigned char lower_level; + u8 threaded; + + unsigned short neigh_priv_len; + unsigned short dev_id; + unsigned short dev_port; + int irq; + u32 priv_len; + spinlock_t addr_list_lock; - struct netdev_hw_addr_list uc; /* Unicast mac addresses */ - struct netdev_hw_addr_list mc; /* Multicast mac addresses */ - struct netdev_hw_addr_list dev_addrs; /* list of device - * hw addresses - */ + + struct netdev_hw_addr_list uc; + struct netdev_hw_addr_list mc; + struct netdev_hw_addr_list dev_addrs; + #ifdef CONFIG_SYSFS struct kset *queues_kset; #endif - - bool uc_promisc; +#ifdef CONFIG_LOCKDEP + struct list_head unlink_list; +#endif unsigned int promiscuity; unsigned int allmulti; + bool uc_promisc; +#ifdef CONFIG_LOCKDEP + unsigned char nested_level; +#endif - /* Protocol specific pointers */ + /* Protocol-specific pointers */ + struct in_device __rcu *ip_ptr; + /** @fib_nh_head: nexthops associated with this netdev */ + struct hlist_head fib_nh_head; #if IS_ENABLED(CONFIG_VLAN_8021Q) - struct vlan_info __rcu *vlan_info; /* VLAN info */ + struct vlan_info __rcu *vlan_info; #endif #if IS_ENABLED(CONFIG_NET_DSA) - struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ + struct dsa_port *dsa_ptr; +#endif +#if IS_ENABLED(CONFIG_TIPC) + struct tipc_bearer __rcu *tipc_ptr; +#endif +#if IS_ENABLED(CONFIG_ATALK) + void *atalk_ptr; +#endif +#if IS_ENABLED(CONFIG_AX25) + struct ax25_dev __rcu *ax25_ptr; +#endif +#if IS_ENABLED(CONFIG_CFG80211) + struct wireless_dev *ieee80211_ptr; +#endif +#if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN) + struct wpan_dev *ieee802154_ptr; +#endif +#if IS_ENABLED(CONFIG_MPLS_ROUTING) + struct mpls_dev __rcu *mpls_ptr; +#endif +#if IS_ENABLED(CONFIG_MCTP) + struct mctp_dev __rcu *mctp_ptr; +#endif +#if IS_ENABLED(CONFIG_INET_PSP) + struct psp_dev __rcu *psp_dev; #endif - void *atalk_ptr; /* AppleTalk link */ - struct in_device __rcu *ip_ptr; /* IPv4 specific data */ - struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ - struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ - void *ax25_ptr; /* AX.25 specific data */ - struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, - assign before registering */ /* * Cache lines mostly used on receive path (including eth_type_trans()) */ - unsigned long last_rx; /* Time of last Rx - * This should not be set in - * drivers, unless really needed, - * because network stack (bonding) - * use it if/when necessary, to - * avoid dirtying this cache line. - */ - /* Interface address info used in eth_type_trans() */ - unsigned char *dev_addr; /* hw address, (before bcast - because most packets are - unicast) */ - - -#ifdef CONFIG_RPS - struct netdev_rx_queue *_rx; + const unsigned char *dev_addr; - /* Number of RX queues allocated at register_netdev() time */ unsigned int num_rx_queues; - - /* Number of RX queues currently active in device */ - unsigned int real_num_rx_queues; - -#endif - - rx_handler_func_t __rcu *rx_handler; - void __rcu *rx_handler_data; - +#define GRO_LEGACY_MAX_SIZE 65536u +/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE), + * and shinfo->gso_segs is a 16bit field. + */ +#define GRO_MAX_SIZE (8 * 65535u) + unsigned int xdp_zc_max_segs; struct netdev_queue __rcu *ingress_queue; - unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ +#ifdef CONFIG_NETFILTER_INGRESS + struct nf_hook_entries __rcu *nf_hooks_ingress; +#endif + unsigned char broadcast[MAX_ADDR_LEN]; +#ifdef CONFIG_RFS_ACCEL + struct cpu_rmap *rx_cpu_rmap; +#endif + struct hlist_node index_hlist; /* * Cache lines mostly used on transmit path */ - struct netdev_queue *_tx ____cacheline_aligned_in_smp; - - /* Number of TX queues allocated at alloc_netdev_mq() time */ unsigned int num_tx_queues; - - /* Number of TX queues currently active in device */ - unsigned int real_num_tx_queues; - - /* root qdisc from userspace point of view */ - struct Qdisc *qdisc; - - unsigned long tx_queue_len; /* Max frames per queue allowed */ + struct Qdisc __rcu *qdisc; + unsigned int tx_queue_len; spinlock_t tx_global_lock; -#ifdef CONFIG_XPS - struct xps_dev_maps __rcu *xps_maps; -#endif -#ifdef CONFIG_RFS_ACCEL - /* CPU reverse-mapping for RX completion interrupts, indexed - * by RX queue number. Assigned by driver. This must only be - * set if the ndo_rx_flow_steer operation is defined. */ - struct cpu_rmap *rx_cpu_rmap; -#endif + struct xdp_dev_bulk_queue __percpu *xdp_bulkq; +#ifdef CONFIG_NET_SCHED + DECLARE_HASHTABLE (qdisc_hash, 4); +#endif /* These may be needed for future network-power-down code. */ - - /* - * trans_start here is expensive for high speed devices on SMP, - * please use netdev_queue->trans_start instead. - */ - unsigned long trans_start; /* Time (in jiffies) of last Tx */ - - int watchdog_timeo; /* used by dev_watchdog() */ struct timer_list watchdog_timer; + int watchdog_timeo; - /* Number of references to this device */ - int __percpu *pcpu_refcnt; + u32 proto_down_reason; - /* delayed register/unregister */ struct list_head todo_list; - /* device index hash chain */ - struct hlist_node index_hlist; + +#ifdef CONFIG_PCPU_DEV_REFCNT + int __percpu *pcpu_refcnt; +#else + refcount_t dev_refcnt; +#endif + struct ref_tracker_dir refcnt_tracker; struct list_head link_watch_list; - /* register/unregister state machine */ - enum { NETREG_UNINITIALIZED=0, - NETREG_REGISTERED, /* completed register_netdevice */ - NETREG_UNREGISTERING, /* called unregister_netdevice */ - NETREG_UNREGISTERED, /* completed unregister todo */ - NETREG_RELEASED, /* called free_netdev */ - NETREG_DUMMY, /* dummy device for NAPI poll */ - } reg_state:8; + u8 reg_state; - bool dismantle; /* device is going do be freed */ + bool dismantle; - enum { - RTNL_LINK_INITIALIZED, - RTNL_LINK_INITIALIZING, - } rtnl_link_state:16; + /** @moving_ns: device is changing netns, protected by @lock */ + bool moving_ns; + /** @rtnl_link_initializing: Device being created, suppress events */ + bool rtnl_link_initializing; - /* Called from unregister, can be used to call free_netdev */ - void (*destructor)(struct net_device *dev); + bool needs_free_netdev; + void (*priv_destructor)(struct net_device *dev); -#ifdef CONFIG_NETPOLL - struct netpoll_info __rcu *npinfo; -#endif + /* mid-layer private */ + void *ml_priv; + enum netdev_ml_priv_type ml_priv_type; -#ifdef CONFIG_NET_NS - /* Network namespace this network device is inside */ - struct net *nd_net; -#endif + enum netdev_stat_type pcpu_stat_type:8; - /* mid-layer private */ - union { - void *ml_priv; - struct pcpu_lstats __percpu *lstats; /* loopback stats */ - struct pcpu_tstats __percpu *tstats; /* tunnel stats */ - struct pcpu_dstats __percpu *dstats; /* dummy stats */ - struct pcpu_vstats __percpu *vstats; /* veth stats */ - }; - /* GARP */ +#if IS_ENABLED(CONFIG_GARP) struct garp_port __rcu *garp_port; - /* MRP */ +#endif +#if IS_ENABLED(CONFIG_MRP) struct mrp_port __rcu *mrp_port; - - /* class/net/name entry */ +#endif +#if IS_ENABLED(CONFIG_NET_DROP_MONITOR) + struct dm_hw_stat_delta __rcu *dm_private; +#endif struct device dev; - /* space for optional device, statistics, and wireless sysfs groups */ - const struct attribute_group *sysfs_groups[4]; + const struct attribute_group *sysfs_groups[5]; + const struct attribute_group *sysfs_rx_queue_group; - /* rtnetlink link ops */ const struct rtnl_link_ops *rtnl_link_ops; + const struct netdev_stat_ops *stat_ops; + + const struct netdev_queue_mgmt_ops *queue_mgmt_ops; + /* for setting kernel sock attribute on TCP connection setup */ -#define GSO_MAX_SIZE 65536 - unsigned int gso_max_size; -#define GSO_MAX_SEGS 65535 - u16 gso_max_segs; +#define GSO_MAX_SEGS 65535u +#define GSO_LEGACY_MAX_SIZE 65536u +/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE), + * and shinfo->gso_segs is a 16bit field. + */ +#define GSO_MAX_SIZE (8 * GSO_MAX_SEGS) + +#define TSO_LEGACY_MAX_SIZE 65536 +#define TSO_MAX_SIZE UINT_MAX + unsigned int tso_max_size; +#define TSO_MAX_SEGS U16_MAX + u16 tso_max_segs; #ifdef CONFIG_DCB - /* Data Center Bridging netlink ops */ const struct dcbnl_rtnl_ops *dcbnl_ops; #endif - u8 num_tc; - struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; - u8 prio_tc_map[TC_BITMASK + 1]; + u8 prio_tc_map[TC_BITMASK + 1]; #if IS_ENABLED(CONFIG_FCOE) - /* max exchange id for FCoE LRO by ddp */ unsigned int fcoe_ddp_xid; #endif -#if IS_ENABLED(CONFIG_NETPRIO_CGROUP) +#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) struct netprio_map __rcu *priomap; #endif - /* phy device may attach itself for hardware timestamping */ - struct phy_device *phydev; + struct phy_link_topology *link_topo; + struct phy_device *phydev; + struct sfp_bus *sfp_bus; + struct lock_class_key *qdisc_tx_busylock; + bool proto_down; + bool irq_affinity_auto; + bool rx_cpu_rmap_auto; + + /* priv_flags_slow, ungrouped to save space */ + unsigned long see_all_hwtstamp_requests:1; + unsigned long change_proto_down:1; + unsigned long netns_immutable:1; + unsigned long fcoe_mtu:1; + + struct list_head net_notifier_list; + +#if IS_ENABLED(CONFIG_MACSEC) + /* MACsec management functions */ + const struct macsec_ops *macsec_ops; +#endif + const struct udp_tunnel_nic_info *udp_tunnel_nic_info; + struct udp_tunnel_nic *udp_tunnel_nic; + + /** @cfg: net_device queue-related configuration */ + struct netdev_config *cfg; + /** + * @cfg_pending: same as @cfg but when device is being actively + * reconfigured includes any changes to the configuration + * requested by the user, but which may or may not be rejected. + */ + struct netdev_config *cfg_pending; + struct ethtool_netdev_state *ethtool; - struct lock_class_key *qdisc_tx_busylock; + /* protected by rtnl_lock */ + struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE]; - /* group the device belongs to */ - int group; + u8 dev_addr_shadow[MAX_ADDR_LEN]; + netdevice_tracker linkwatch_dev_tracker; + netdevice_tracker watchdog_dev_tracker; + netdevice_tracker dev_registered_tracker; + struct rtnl_hw_stats64 *offload_xstats_l3; - struct pm_qos_request pm_qos_req; -}; + struct devlink_port *devlink_port; + +#if IS_ENABLED(CONFIG_DPLL) + struct dpll_pin __rcu *dpll_pin; +#endif +#if IS_ENABLED(CONFIG_PAGE_POOL) + /** @page_pools: page pools created for this netdevice */ + struct hlist_head page_pools; +#endif + + /** @irq_moder: dim parameters used if IS_ENABLED(CONFIG_DIMLIB). */ + struct dim_irq_moder *irq_moder; + + u64 max_pacing_offload_horizon; + struct napi_config *napi_config; + u32 num_napi_configs; + u32 napi_defer_hard_irqs; + unsigned long gro_flush_timeout; + + /** + * @up: copy of @state's IFF_UP, but safe to read with just @lock. + * May report false negatives while the device is being opened + * or closed (@lock does not protect .ndo_open, or .ndo_close). + */ + bool up; + + /** + * @request_ops_lock: request the core to run all @netdev_ops and + * @ethtool_ops under the @lock. + */ + bool request_ops_lock; + + /** + * @lock: netdev-scope lock, protects a small selection of fields. + * Should always be taken using netdev_lock() / netdev_unlock() helpers. + * Drivers are free to use it for other protection. + * + * For the drivers that implement shaper or queue API, the scope + * of this lock is expanded to cover most ndo/queue/ethtool/sysfs + * operations. Drivers may opt-in to this behavior by setting + * @request_ops_lock. + * + * @lock protection mixes with rtnl_lock in multiple ways, fields are + * either: + * + * - simply protected by the instance @lock; + * + * - double protected - writers hold both locks, readers hold either; + * + * - ops protected - protected by the lock held around the NDOs + * and other callbacks, that is the instance lock on devices for + * which netdev_need_ops_lock() returns true, otherwise by rtnl_lock; + * + * - double ops protected - always protected by rtnl_lock but for + * devices for which netdev_need_ops_lock() returns true - also + * the instance lock. + * + * Simply protects: + * @gro_flush_timeout, @napi_defer_hard_irqs, @napi_list, + * @net_shaper_hierarchy, @reg_state, @threaded + * + * Double protects: + * @up, @moving_ns, @nd_net, @xdp_features + * + * Double ops protects: + * @real_num_rx_queues, @real_num_tx_queues + * + * Also protects some fields in: + * struct napi_struct, struct netdev_queue, struct netdev_rx_queue + * + * Ordering: take after rtnl_lock. + */ + struct mutex lock; + +#if IS_ENABLED(CONFIG_NET_SHAPER) + /** + * @net_shaper_hierarchy: data tracking the current shaper status + * see include/net/net_shapers.h + */ + struct net_shaper_hierarchy *net_shaper_hierarchy; +#endif + + struct hlist_head neighbours[NEIGH_NR_TABLES]; + + struct hwtstamp_provider __rcu *hwprov; + + u8 priv[] ____cacheline_aligned + __counted_by(priv_len); +} ____cacheline_aligned; #define to_net_dev(d) container_of(d, struct net_device, dev) +/* + * Driver should use this to assign devlink port instance to a netdevice + * before it registers the netdevice. Therefore devlink_port is static + * during the netdev lifetime after it is registered. + */ +#define SET_NETDEV_DEVLINK_PORT(dev, port) \ +({ \ + WARN_ON((dev)->reg_state != NETREG_UNINITIALIZED); \ + ((dev)->devlink_port = (port)); \ +}) + +static inline bool netif_elide_gro(const struct net_device *dev) +{ + if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog) + return true; + return false; +} + #define NETDEV_ALIGN 32 static inline @@ -1395,48 +2616,58 @@ int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) return 0; } +int netdev_txq_to_tc(struct net_device *dev, unsigned int txq); +void netdev_reset_tc(struct net_device *dev); +int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset); +int netdev_set_num_tc(struct net_device *dev, u8 num_tc); + static inline -void netdev_reset_tc(struct net_device *dev) +int netdev_get_num_tc(struct net_device *dev) { - dev->num_tc = 0; - memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); - memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); + return dev->num_tc; } -static inline -int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) +static inline void net_prefetch(void *p) { - if (tc >= dev->num_tc) - return -EINVAL; - - dev->tc_to_txq[tc].count = count; - dev->tc_to_txq[tc].offset = offset; - return 0; + prefetch(p); +#if L1_CACHE_BYTES < 128 + prefetch((u8 *)p + L1_CACHE_BYTES); +#endif } -static inline -int netdev_set_num_tc(struct net_device *dev, u8 num_tc) +static inline void net_prefetchw(void *p) { - if (num_tc > TC_MAX_QUEUE) - return -EINVAL; - - dev->num_tc = num_tc; - return 0; + prefetchw(p); +#if L1_CACHE_BYTES < 128 + prefetchw((u8 *)p + L1_CACHE_BYTES); +#endif } -static inline -int netdev_get_num_tc(struct net_device *dev) +void netdev_unbind_sb_channel(struct net_device *dev, + struct net_device *sb_dev); +int netdev_bind_sb_channel_queue(struct net_device *dev, + struct net_device *sb_dev, + u8 tc, u16 count, u16 offset); +int netdev_set_sb_channel(struct net_device *dev, u16 channel); +static inline int netdev_get_sb_channel(struct net_device *dev) { - return dev->num_tc; + return max_t(int, -dev->num_tc, 0); } static inline struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, unsigned int index) { + DEBUG_NET_WARN_ON_ONCE(index >= dev->num_tx_queues); return &dev->_tx[index]; } +static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, + const struct sk_buff *skb) +{ + return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); +} + static inline void netdev_for_each_tx_queue(struct net_device *dev, void (*f)(struct net_device *, struct netdev_queue *, @@ -1449,9 +2680,54 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev, f(dev, &dev->_tx[i], arg); } -extern struct netdev_queue *netdev_pick_tx(struct net_device *dev, - struct sk_buff *skb); -extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); +u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb, + struct net_device *sb_dev); +struct netdev_queue *netdev_core_pick_tx(struct net_device *dev, + struct sk_buff *skb, + struct net_device *sb_dev); + +/* returns the headroom that the master device needs to take in account + * when forwarding to this dev + */ +static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) +{ + return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; +} + +static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) +{ + if (dev->netdev_ops->ndo_set_rx_headroom) + dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); +} + +/* set the device rx headroom to the dev's default */ +static inline void netdev_reset_rx_headroom(struct net_device *dev) +{ + netdev_set_rx_headroom(dev, -1); +} + +static inline void *netdev_get_ml_priv(struct net_device *dev, + enum netdev_ml_priv_type type) +{ + if (dev->ml_priv_type != type) + return NULL; + + return dev->ml_priv; +} + +static inline void netdev_set_ml_priv(struct net_device *dev, + void *ml_priv, + enum netdev_ml_priv_type type) +{ + WARN(dev->ml_priv_type && dev->ml_priv_type != type, + "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n", + dev->ml_priv_type, type); + WARN(!dev->ml_priv_type && dev->ml_priv, + "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n"); + + dev->ml_priv = ml_priv; + dev->ml_priv_type = type; +} /* * Net namespace inlines @@ -1463,32 +2739,15 @@ struct net *dev_net(const struct net_device *dev) } static inline -void dev_net_set(struct net_device *dev, struct net *net) -{ -#ifdef CONFIG_NET_NS - release_net(dev->nd_net); - dev->nd_net = hold_net(net); -#endif -} - -static inline bool netdev_uses_dsa_tags(struct net_device *dev) +struct net *dev_net_rcu(const struct net_device *dev) { -#ifdef CONFIG_NET_DSA_TAG_DSA - if (dev->dsa_ptr != NULL) - return dsa_uses_dsa_tags(dev->dsa_ptr); -#endif - - return 0; + return read_pnet_rcu(&dev->nd_net); } -static inline bool netdev_uses_trailer_tags(struct net_device *dev) +static inline +void dev_net_set(struct net_device *dev, struct net *net) { -#ifdef CONFIG_NET_DSA_TAG_TRAILER - if (dev->dsa_ptr != NULL) - return dsa_uses_trailer_tags(dev->dsa_ptr); -#endif - - return 0; + write_pnet(&dev->nd_net, net); } /** @@ -1499,7 +2758,7 @@ static inline bool netdev_uses_trailer_tags(struct net_device *dev) */ static inline void *netdev_priv(const struct net_device *dev) { - return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); + return (void *)dev->priv; } /* Set the sysfs physical device reference for the network logical device @@ -1508,82 +2767,182 @@ static inline void *netdev_priv(const struct net_device *dev) #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) /* Set the sysfs device type for the network logical device to allow - * fin grained indentification of different network device types. For - * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. + * fine-grained identification of different network device types. For + * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. */ #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) +void netif_queue_set_napi(struct net_device *dev, unsigned int queue_index, + enum netdev_queue_type type, + struct napi_struct *napi); + +static inline void netdev_lock(struct net_device *dev) +{ + mutex_lock(&dev->lock); +} + +static inline void netdev_unlock(struct net_device *dev) +{ + mutex_unlock(&dev->lock); +} +/* Additional netdev_lock()-related helpers are in net/netdev_lock.h */ + +void netif_napi_set_irq_locked(struct napi_struct *napi, int irq); + +static inline void netif_napi_set_irq(struct napi_struct *napi, int irq) +{ + netdev_lock(napi->dev); + netif_napi_set_irq_locked(napi, irq); + netdev_unlock(napi->dev); +} + /* Default NAPI poll() weight * Device drivers are strongly advised to not use bigger value */ #define NAPI_POLL_WEIGHT 64 -/** - * netif_napi_add - initialize a napi context - * @dev: network device - * @napi: napi context - * @poll: polling function - * @weight: default weight - * - * netif_napi_add() must be used to initialize a napi context prior to calling - * *any* of the other napi related functions. - */ -void netif_napi_add(struct net_device *dev, struct napi_struct *napi, - int (*poll)(struct napi_struct *, int), int weight); +void netif_napi_add_weight_locked(struct net_device *dev, + struct napi_struct *napi, + int (*poll)(struct napi_struct *, int), + int weight); + +static inline void +netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi, + int (*poll)(struct napi_struct *, int), int weight) +{ + netdev_lock(dev); + netif_napi_add_weight_locked(dev, napi, poll, weight); + netdev_unlock(dev); +} /** - * netif_napi_del - remove a napi context - * @napi: napi context + * netif_napi_add() - initialize a NAPI context + * @dev: network device + * @napi: NAPI context + * @poll: polling function * - * netif_napi_del() removes a napi context from the network device napi list + * netif_napi_add() must be used to initialize a NAPI context prior to calling + * *any* of the other NAPI-related functions. */ -void netif_napi_del(struct napi_struct *napi); - -struct napi_gro_cb { - /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ - void *frag0; +static inline void +netif_napi_add(struct net_device *dev, struct napi_struct *napi, + int (*poll)(struct napi_struct *, int)) +{ + netif_napi_add_weight(dev, napi, poll, NAPI_POLL_WEIGHT); +} - /* Length of frag0. */ - unsigned int frag0_len; +static inline void +netif_napi_add_locked(struct net_device *dev, struct napi_struct *napi, + int (*poll)(struct napi_struct *, int)) +{ + netif_napi_add_weight_locked(dev, napi, poll, NAPI_POLL_WEIGHT); +} - /* This indicates where we are processing relative to skb->data. */ - int data_offset; +static inline void +netif_napi_add_tx_weight(struct net_device *dev, + struct napi_struct *napi, + int (*poll)(struct napi_struct *, int), + int weight) +{ + set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); + netif_napi_add_weight(dev, napi, poll, weight); +} - /* This is non-zero if the packet cannot be merged with the new skb. */ - int flush; +static inline void +netif_napi_add_config_locked(struct net_device *dev, struct napi_struct *napi, + int (*poll)(struct napi_struct *, int), int index) +{ + napi->index = index; + napi->config = &dev->napi_config[index]; + netif_napi_add_weight_locked(dev, napi, poll, NAPI_POLL_WEIGHT); +} - /* Number of segments aggregated. */ - u16 count; +/** + * netif_napi_add_config - initialize a NAPI context with persistent config + * @dev: network device + * @napi: NAPI context + * @poll: polling function + * @index: the NAPI index + */ +static inline void +netif_napi_add_config(struct net_device *dev, struct napi_struct *napi, + int (*poll)(struct napi_struct *, int), int index) +{ + netdev_lock(dev); + netif_napi_add_config_locked(dev, napi, poll, index); + netdev_unlock(dev); +} - /* This is non-zero if the packet may be of the same flow. */ - u8 same_flow; +/** + * netif_napi_add_tx() - initialize a NAPI context to be used for Tx only + * @dev: network device + * @napi: NAPI context + * @poll: polling function + * + * This variant of netif_napi_add() should be used from drivers using NAPI + * to exclusively poll a TX queue. + * This will avoid we add it into napi_hash[], thus polluting this hash table. + */ +static inline void netif_napi_add_tx(struct net_device *dev, + struct napi_struct *napi, + int (*poll)(struct napi_struct *, int)) +{ + netif_napi_add_tx_weight(dev, napi, poll, NAPI_POLL_WEIGHT); +} - /* Free the skb? */ - u8 free; -#define NAPI_GRO_FREE 1 -#define NAPI_GRO_FREE_STOLEN_HEAD 2 +void __netif_napi_del_locked(struct napi_struct *napi); - /* jiffies when first packet was created/queued */ - unsigned long age; +/** + * __netif_napi_del - remove a NAPI context + * @napi: NAPI context + * + * Warning: caller must observe RCU grace period before freeing memory + * containing @napi. Drivers might want to call this helper to combine + * all the needed RCU grace periods into a single one. + */ +static inline void __netif_napi_del(struct napi_struct *napi) +{ + netdev_lock(napi->dev); + __netif_napi_del_locked(napi); + netdev_unlock(napi->dev); +} - /* Used in ipv6_gro_receive() */ - int proto; +static inline void netif_napi_del_locked(struct napi_struct *napi) +{ + __netif_napi_del_locked(napi); + synchronize_net(); +} - /* used in skb_gro_receive() slow path */ - struct sk_buff *last; -}; +/** + * netif_napi_del - remove a NAPI context + * @napi: NAPI context + * + * netif_napi_del() removes a NAPI context from the network device NAPI list + */ +static inline void netif_napi_del(struct napi_struct *napi) +{ + __netif_napi_del(napi); + synchronize_net(); +} -#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) +int netif_enable_cpu_rmap(struct net_device *dev, unsigned int num_irqs); +void netif_set_affinity_auto(struct net_device *dev); struct packet_type { __be16 type; /* This is really htons(ether_type). */ + bool ignore_outgoing; struct net_device *dev; /* NULL is wildcarded here */ + netdevice_tracker dev_tracker; int (*func) (struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); + void (*list_func) (struct list_head *, + struct packet_type *, + struct net_device *); bool (*id_match)(struct packet_type *ptype, struct sock *sk); + struct net *af_packet_net; void *af_packet_priv; struct list_head list; }; @@ -1591,54 +2950,263 @@ struct packet_type { struct offload_callbacks { struct sk_buff *(*gso_segment)(struct sk_buff *skb, netdev_features_t features); - int (*gso_send_check)(struct sk_buff *skb); - struct sk_buff **(*gro_receive)(struct sk_buff **head, - struct sk_buff *skb); - int (*gro_complete)(struct sk_buff *skb); + struct sk_buff *(*gro_receive)(struct list_head *head, + struct sk_buff *skb); + int (*gro_complete)(struct sk_buff *skb, int nhoff); }; struct packet_offload { __be16 type; /* This is really htons(ether_type). */ + u16 priority; struct offload_callbacks callbacks; struct list_head list; }; +/* often modified stats are per-CPU, other are shared (netdev->stats) */ +struct pcpu_sw_netstats { + u64_stats_t rx_packets; + u64_stats_t rx_bytes; + u64_stats_t tx_packets; + u64_stats_t tx_bytes; + struct u64_stats_sync syncp; +} __aligned(4 * sizeof(u64)); + +struct pcpu_dstats { + u64_stats_t rx_packets; + u64_stats_t rx_bytes; + u64_stats_t tx_packets; + u64_stats_t tx_bytes; + u64_stats_t rx_drops; + u64_stats_t tx_drops; + struct u64_stats_sync syncp; +} __aligned(8 * sizeof(u64)); + +struct pcpu_lstats { + u64_stats_t packets; + u64_stats_t bytes; + struct u64_stats_sync syncp; +} __aligned(2 * sizeof(u64)); + +void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes); + +static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len) +{ + struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); + + u64_stats_update_begin(&tstats->syncp); + u64_stats_add(&tstats->rx_bytes, len); + u64_stats_inc(&tstats->rx_packets); + u64_stats_update_end(&tstats->syncp); +} + +static inline void dev_sw_netstats_tx_add(struct net_device *dev, + unsigned int packets, + unsigned int len) +{ + struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); + + u64_stats_update_begin(&tstats->syncp); + u64_stats_add(&tstats->tx_bytes, len); + u64_stats_add(&tstats->tx_packets, packets); + u64_stats_update_end(&tstats->syncp); +} + +static inline void dev_lstats_add(struct net_device *dev, unsigned int len) +{ + struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats); + + u64_stats_update_begin(&lstats->syncp); + u64_stats_add(&lstats->bytes, len); + u64_stats_inc(&lstats->packets); + u64_stats_update_end(&lstats->syncp); +} + +static inline void dev_dstats_rx_add(struct net_device *dev, + unsigned int len) +{ + struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); + + u64_stats_update_begin(&dstats->syncp); + u64_stats_inc(&dstats->rx_packets); + u64_stats_add(&dstats->rx_bytes, len); + u64_stats_update_end(&dstats->syncp); +} + +static inline void dev_dstats_rx_dropped(struct net_device *dev) +{ + struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); + + u64_stats_update_begin(&dstats->syncp); + u64_stats_inc(&dstats->rx_drops); + u64_stats_update_end(&dstats->syncp); +} + +static inline void dev_dstats_rx_dropped_add(struct net_device *dev, + unsigned int packets) +{ + struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); + + u64_stats_update_begin(&dstats->syncp); + u64_stats_add(&dstats->rx_drops, packets); + u64_stats_update_end(&dstats->syncp); +} + +static inline void dev_dstats_tx_add(struct net_device *dev, + unsigned int len) +{ + struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); + + u64_stats_update_begin(&dstats->syncp); + u64_stats_inc(&dstats->tx_packets); + u64_stats_add(&dstats->tx_bytes, len); + u64_stats_update_end(&dstats->syncp); +} + +static inline void dev_dstats_tx_dropped(struct net_device *dev) +{ + struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats); + + u64_stats_update_begin(&dstats->syncp); + u64_stats_inc(&dstats->tx_drops); + u64_stats_update_end(&dstats->syncp); +} + +#define __netdev_alloc_pcpu_stats(type, gfp) \ +({ \ + typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ + if (pcpu_stats) { \ + int __cpu; \ + for_each_possible_cpu(__cpu) { \ + typeof(type) *stat; \ + stat = per_cpu_ptr(pcpu_stats, __cpu); \ + u64_stats_init(&stat->syncp); \ + } \ + } \ + pcpu_stats; \ +}) + +#define netdev_alloc_pcpu_stats(type) \ + __netdev_alloc_pcpu_stats(type, GFP_KERNEL) + +#define devm_netdev_alloc_pcpu_stats(dev, type) \ +({ \ + typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\ + if (pcpu_stats) { \ + int __cpu; \ + for_each_possible_cpu(__cpu) { \ + typeof(type) *stat; \ + stat = per_cpu_ptr(pcpu_stats, __cpu); \ + u64_stats_init(&stat->syncp); \ + } \ + } \ + pcpu_stats; \ +}) + +enum netdev_lag_tx_type { + NETDEV_LAG_TX_TYPE_UNKNOWN, + NETDEV_LAG_TX_TYPE_RANDOM, + NETDEV_LAG_TX_TYPE_BROADCAST, + NETDEV_LAG_TX_TYPE_ROUNDROBIN, + NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, + NETDEV_LAG_TX_TYPE_HASH, +}; + +enum netdev_lag_hash { + NETDEV_LAG_HASH_NONE, + NETDEV_LAG_HASH_L2, + NETDEV_LAG_HASH_L34, + NETDEV_LAG_HASH_L23, + NETDEV_LAG_HASH_E23, + NETDEV_LAG_HASH_E34, + NETDEV_LAG_HASH_VLAN_SRCMAC, + NETDEV_LAG_HASH_UNKNOWN, +}; + +struct netdev_lag_upper_info { + enum netdev_lag_tx_type tx_type; + enum netdev_lag_hash hash_type; +}; + +struct netdev_lag_lower_state_info { + u8 link_up : 1, + tx_enabled : 1; +}; + #include <linux/notifier.h> -/* netdevice notifier chain. Please remember to update the rtnetlink - * notification exclusion list in rtnetlink_event() when adding new - * types. +/* netdevice notifier chain. Please remember to update netdev_cmd_to_name() + * and the rtnetlink notification exclusion list in rtnetlink_event() when + * adding new types. */ -#define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ -#define NETDEV_DOWN 0x0002 -#define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface +enum netdev_cmd { + NETDEV_UP = 1, /* For now you can't veto a device up/down */ + NETDEV_DOWN, + NETDEV_REBOOT, /* Tell a protocol stack a network interface detected a hardware crash and restarted - we can use this eg to kick tcp sessions once done */ -#define NETDEV_CHANGE 0x0004 /* Notify device state change */ -#define NETDEV_REGISTER 0x0005 -#define NETDEV_UNREGISTER 0x0006 -#define NETDEV_CHANGEMTU 0x0007 -#define NETDEV_CHANGEADDR 0x0008 -#define NETDEV_GOING_DOWN 0x0009 -#define NETDEV_CHANGENAME 0x000A -#define NETDEV_FEAT_CHANGE 0x000B -#define NETDEV_BONDING_FAILOVER 0x000C -#define NETDEV_PRE_UP 0x000D -#define NETDEV_PRE_TYPE_CHANGE 0x000E -#define NETDEV_POST_TYPE_CHANGE 0x000F -#define NETDEV_POST_INIT 0x0010 -#define NETDEV_UNREGISTER_FINAL 0x0011 -#define NETDEV_RELEASE 0x0012 -#define NETDEV_NOTIFY_PEERS 0x0013 -#define NETDEV_JOIN 0x0014 -#define NETDEV_CHANGEUPPER 0x0015 - -extern int register_netdevice_notifier(struct notifier_block *nb); -extern int unregister_netdevice_notifier(struct notifier_block *nb); + NETDEV_CHANGE, /* Notify device state change */ + NETDEV_REGISTER, + NETDEV_UNREGISTER, + NETDEV_CHANGEMTU, /* notify after mtu change happened */ + NETDEV_CHANGEADDR, /* notify after the address change */ + NETDEV_PRE_CHANGEADDR, /* notify before the address change */ + NETDEV_GOING_DOWN, + NETDEV_CHANGENAME, + NETDEV_FEAT_CHANGE, + NETDEV_BONDING_FAILOVER, + NETDEV_PRE_UP, + NETDEV_PRE_TYPE_CHANGE, + NETDEV_POST_TYPE_CHANGE, + NETDEV_POST_INIT, + NETDEV_PRE_UNINIT, + NETDEV_RELEASE, + NETDEV_NOTIFY_PEERS, + NETDEV_JOIN, + NETDEV_CHANGEUPPER, + NETDEV_RESEND_IGMP, + NETDEV_PRECHANGEMTU, /* notify before mtu change happened */ + NETDEV_CHANGEINFODATA, + NETDEV_BONDING_INFO, + NETDEV_PRECHANGEUPPER, + NETDEV_CHANGELOWERSTATE, + NETDEV_UDP_TUNNEL_PUSH_INFO, + NETDEV_UDP_TUNNEL_DROP_INFO, + NETDEV_CHANGE_TX_QUEUE_LEN, + NETDEV_CVLAN_FILTER_PUSH_INFO, + NETDEV_CVLAN_FILTER_DROP_INFO, + NETDEV_SVLAN_FILTER_PUSH_INFO, + NETDEV_SVLAN_FILTER_DROP_INFO, + NETDEV_OFFLOAD_XSTATS_ENABLE, + NETDEV_OFFLOAD_XSTATS_DISABLE, + NETDEV_OFFLOAD_XSTATS_REPORT_USED, + NETDEV_OFFLOAD_XSTATS_REPORT_DELTA, + NETDEV_XDP_FEAT_CHANGE, +}; +const char *netdev_cmd_to_name(enum netdev_cmd cmd); + +int register_netdevice_notifier(struct notifier_block *nb); +int unregister_netdevice_notifier(struct notifier_block *nb); +int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb); +int unregister_netdevice_notifier_net(struct net *net, + struct notifier_block *nb); +int register_netdevice_notifier_dev_net(struct net_device *dev, + struct notifier_block *nb, + struct netdev_net_notifier *nn); +int unregister_netdevice_notifier_dev_net(struct net_device *dev, + struct notifier_block *nb, + struct netdev_net_notifier *nn); struct netdev_notifier_info { - struct net_device *dev; + struct net_device *dev; + struct netlink_ext_ack *extack; +}; + +struct netdev_notifier_info_ext { + struct netdev_notifier_info info; /* must be first */ + union { + u32 mtu; + } ext; }; struct netdev_notifier_change_info { @@ -1646,10 +3214,65 @@ struct netdev_notifier_change_info { unsigned int flags_changed; }; +struct netdev_notifier_changeupper_info { + struct netdev_notifier_info info; /* must be first */ + struct net_device *upper_dev; /* new upper dev */ + bool master; /* is upper dev master */ + bool linking; /* is the notification for link or unlink */ + void *upper_info; /* upper dev info */ +}; + +struct netdev_notifier_changelowerstate_info { + struct netdev_notifier_info info; /* must be first */ + void *lower_state_info; /* is lower dev state */ +}; + +struct netdev_notifier_pre_changeaddr_info { + struct netdev_notifier_info info; /* must be first */ + const unsigned char *dev_addr; +}; + +enum netdev_offload_xstats_type { + NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1, +}; + +struct netdev_notifier_offload_xstats_info { + struct netdev_notifier_info info; /* must be first */ + enum netdev_offload_xstats_type type; + + union { + /* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */ + struct netdev_notifier_offload_xstats_rd *report_delta; + /* NETDEV_OFFLOAD_XSTATS_REPORT_USED */ + struct netdev_notifier_offload_xstats_ru *report_used; + }; +}; + +int netdev_offload_xstats_enable(struct net_device *dev, + enum netdev_offload_xstats_type type, + struct netlink_ext_ack *extack); +int netdev_offload_xstats_disable(struct net_device *dev, + enum netdev_offload_xstats_type type); +bool netdev_offload_xstats_enabled(const struct net_device *dev, + enum netdev_offload_xstats_type type); +int netdev_offload_xstats_get(struct net_device *dev, + enum netdev_offload_xstats_type type, + struct rtnl_hw_stats64 *stats, bool *used, + struct netlink_ext_ack *extack); +void +netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd, + const struct rtnl_hw_stats64 *stats); +void +netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru); +void netdev_offload_xstats_push_delta(struct net_device *dev, + enum netdev_offload_xstats_type type, + const struct rtnl_hw_stats64 *stats); + static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, struct net_device *dev) { info->dev = dev; + info->extack = NULL; } static inline struct net_device * @@ -1658,15 +3281,15 @@ netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) return info->dev; } -extern int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev, - struct netdev_notifier_info *info); -extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); - - -extern rwlock_t dev_base_lock; /* Device list lock */ - -extern seqcount_t devnet_rename_seq; /* Device rename seq */ +static inline struct netlink_ext_ack * +netdev_notifier_info_to_extack(const struct netdev_notifier_info *info) +{ + return info->extack; +} +int call_netdevice_notifiers(unsigned long val, struct net_device *dev); +int call_netdevice_notifiers_info(unsigned long val, + struct netdev_notifier_info *info); #define for_each_netdev(net, d) \ list_for_each_entry(d, &(net)->dev_base_head, dev_list) @@ -1678,13 +3301,20 @@ extern seqcount_t devnet_rename_seq; /* Device rename seq */ list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) #define for_each_netdev_continue(net, d) \ list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) +#define for_each_netdev_continue_reverse(net, d) \ + list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \ + dev_list) #define for_each_netdev_continue_rcu(net, d) \ list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) #define for_each_netdev_in_bond_rcu(bond, slave) \ - for_each_netdev_rcu(&init_net, slave) \ - if (netdev_master_upper_dev_get_rcu(slave) == bond) + for_each_netdev_rcu(dev_net_rcu(bond), slave) \ + if (netdev_master_upper_dev_get_rcu(slave) == (bond)) #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) +#define for_each_netdev_dump(net, d, ifindex) \ + for (; (d = xa_find(&(net)->dev_by_index, &ifindex, \ + ULONG_MAX, XA_PRESENT)); ifindex++) + static inline struct net_device *next_net_device(struct net_device *dev) { struct list_head *lh; @@ -1711,109 +3341,89 @@ static inline struct net_device *first_net_device(struct net *net) net_device_entry(net->dev_base_head.next); } -static inline struct net_device *first_net_device_rcu(struct net *net) -{ - struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); - - return lh == &net->dev_base_head ? NULL : net_device_entry(lh); -} - -extern int netdev_boot_setup_check(struct net_device *dev); -extern unsigned long netdev_boot_base(const char *prefix, int unit); -extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, - const char *hwaddr); -extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); -extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); -extern void dev_add_pack(struct packet_type *pt); -extern void dev_remove_pack(struct packet_type *pt); -extern void __dev_remove_pack(struct packet_type *pt); -extern void dev_add_offload(struct packet_offload *po); -extern void dev_remove_offload(struct packet_offload *po); -extern void __dev_remove_offload(struct packet_offload *po); - -extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, - unsigned short mask); -extern struct net_device *dev_get_by_name(struct net *net, const char *name); -extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); -extern struct net_device *__dev_get_by_name(struct net *net, const char *name); -extern int dev_alloc_name(struct net_device *dev, const char *name); -extern int dev_open(struct net_device *dev); -extern int dev_close(struct net_device *dev); -extern void dev_disable_lro(struct net_device *dev); -extern int dev_loopback_xmit(struct sk_buff *newskb); -extern int dev_queue_xmit(struct sk_buff *skb); -extern int register_netdevice(struct net_device *dev); -extern void unregister_netdevice_queue(struct net_device *dev, - struct list_head *head); -extern void unregister_netdevice_many(struct list_head *head); -static inline void unregister_netdevice(struct net_device *dev) -{ - unregister_netdevice_queue(dev, NULL); -} - -extern int netdev_refcnt_read(const struct net_device *dev); -extern void free_netdev(struct net_device *dev); -extern void synchronize_net(void); -extern int init_dummy_netdev(struct net_device *dev); - -extern struct net_device *dev_get_by_index(struct net *net, int ifindex); -extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); -extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); -extern int netdev_get_name(struct net *net, char *name, int ifindex); -extern int dev_restart(struct net_device *dev); -#ifdef CONFIG_NETPOLL_TRAP -extern int netpoll_trap(void); -#endif -extern int skb_gro_receive(struct sk_buff **head, - struct sk_buff *skb); - -static inline unsigned int skb_gro_offset(const struct sk_buff *skb) -{ - return NAPI_GRO_CB(skb)->data_offset; -} - -static inline unsigned int skb_gro_len(const struct sk_buff *skb) +int netdev_boot_setup_check(struct net_device *dev); +struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, + const char *hwaddr); +struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, + const char *hwaddr); +struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); +void dev_add_pack(struct packet_type *pt); +void dev_remove_pack(struct packet_type *pt); +void __dev_remove_pack(struct packet_type *pt); +void dev_add_offload(struct packet_offload *po); +void dev_remove_offload(struct packet_offload *po); + +int dev_get_iflink(const struct net_device *dev); +int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); +int dev_fill_forward_path(const struct net_device *dev, const u8 *daddr, + struct net_device_path_stack *stack); +struct net_device *dev_get_by_name(struct net *net, const char *name); +struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); +struct net_device *__dev_get_by_name(struct net *net, const char *name); +bool netdev_name_in_use(struct net *net, const char *name); +int dev_alloc_name(struct net_device *dev, const char *name); +int netif_open(struct net_device *dev, struct netlink_ext_ack *extack); +int dev_open(struct net_device *dev, struct netlink_ext_ack *extack); +void netif_close(struct net_device *dev); +void dev_close(struct net_device *dev); +void netif_close_many(struct list_head *head, bool unlink); +void netif_disable_lro(struct net_device *dev); +void dev_disable_lro(struct net_device *dev); +int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); +u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb, + struct net_device *sb_dev); + +int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev); +int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id); + +static inline int dev_queue_xmit(struct sk_buff *skb) { - return skb->len - NAPI_GRO_CB(skb)->data_offset; + return __dev_queue_xmit(skb, NULL); } -static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) +static inline int dev_queue_xmit_accel(struct sk_buff *skb, + struct net_device *sb_dev) { - NAPI_GRO_CB(skb)->data_offset += len; + return __dev_queue_xmit(skb, sb_dev); } -static inline void *skb_gro_header_fast(struct sk_buff *skb, - unsigned int offset) +static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id) { - return NAPI_GRO_CB(skb)->frag0 + offset; -} + int ret; -static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) -{ - return NAPI_GRO_CB(skb)->frag0_len < hlen; + ret = __dev_direct_xmit(skb, queue_id); + if (!dev_xmit_complete(ret)) + kfree_skb(skb); + return ret; } -static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, - unsigned int offset) +int register_netdevice(struct net_device *dev); +void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); +void unregister_netdevice_many(struct list_head *head); +static inline void unregister_netdevice(struct net_device *dev) { - if (!pskb_may_pull(skb, hlen)) - return NULL; - - NAPI_GRO_CB(skb)->frag0 = NULL; - NAPI_GRO_CB(skb)->frag0_len = 0; - return skb->data + offset; + unregister_netdevice_queue(dev, NULL); } -static inline void *skb_gro_mac_header(struct sk_buff *skb) -{ - return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); -} +int netdev_refcnt_read(const struct net_device *dev); +void free_netdev(struct net_device *dev); -static inline void *skb_gro_network_header(struct sk_buff *skb) -{ - return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + - skb_network_offset(skb); -} +struct net_device *netdev_get_xmit_slave(struct net_device *dev, + struct sk_buff *skb, + bool all_slaves); +struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev, + struct sock *sk); +struct net_device *dev_get_by_index(struct net *net, int ifindex); +struct net_device *__dev_get_by_index(struct net *net, int ifindex); +struct net_device *netdev_get_by_index(struct net *net, int ifindex, + netdevice_tracker *tracker, gfp_t gfp); +struct net_device *netdev_get_by_index_lock(struct net *net, int ifindex); +struct net_device *netdev_get_by_name(struct net *net, const char *name, + netdevice_tracker *tracker, gfp_t gfp); +struct net_device *netdev_get_by_flags_rcu(struct net *net, netdevice_tracker *tracker, + unsigned short flags, unsigned short mask); +struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); +void netdev_copy_name(struct net_device *dev, char *name); static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, @@ -1836,85 +3446,148 @@ static inline int dev_parse_header(const struct sk_buff *skb, return dev->header_ops->parse(skb, haddr); } -typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); -extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); -static inline int unregister_gifconf(unsigned int family) +static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb) +{ + const struct net_device *dev = skb->dev; + + if (!dev->header_ops || !dev->header_ops->parse_protocol) + return 0; + return dev->header_ops->parse_protocol(skb); +} + +/* ll_header must have at least hard_header_len allocated */ +static inline bool dev_validate_header(const struct net_device *dev, + char *ll_header, int len) { - return register_gifconf(family, NULL); + if (likely(len >= dev->hard_header_len)) + return true; + if (len < dev->min_header_len) + return false; + + if (capable(CAP_SYS_RAWIO)) { + memset(ll_header + len, 0, dev->hard_header_len - len); + return true; + } + + if (dev->header_ops && dev->header_ops->validate) + return dev->header_ops->validate(ll_header, len); + + return false; } -#ifdef CONFIG_NET_FLOW_LIMIT -#define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ -struct sd_flow_limit { - u64 count; - unsigned int num_buckets; - unsigned int history_head; - u16 history[FLOW_LIMIT_HISTORY]; - u8 buckets[]; +static inline bool dev_has_header(const struct net_device *dev) +{ + return dev->header_ops && dev->header_ops->create; +} + +struct numa_drop_counters { + atomic_t drops0 ____cacheline_aligned_in_smp; + atomic_t drops1 ____cacheline_aligned_in_smp; }; -extern int netdev_flow_limit_table_len; -#endif /* CONFIG_NET_FLOW_LIMIT */ +static inline int numa_drop_read(const struct numa_drop_counters *ndc) +{ + return atomic_read(&ndc->drops0) + atomic_read(&ndc->drops1); +} + +static inline void numa_drop_add(struct numa_drop_counters *ndc, int val) +{ + int n = numa_node_id() % 2; + + if (n) + atomic_add(val, &ndc->drops1); + else + atomic_add(val, &ndc->drops0); +} + +static inline void numa_drop_reset(struct numa_drop_counters *ndc) +{ + atomic_set(&ndc->drops0, 0); + atomic_set(&ndc->drops1, 0); +} /* - * Incoming packets are placed on per-cpu queues + * Incoming packets are placed on per-CPU queues */ struct softnet_data { - struct Qdisc *output_queue; - struct Qdisc **output_queue_tailp; struct list_head poll_list; - struct sk_buff *completion_queue; struct sk_buff_head process_queue; + local_lock_t process_queue_bh_lock; /* stats */ unsigned int processed; unsigned int time_squeeze; - unsigned int cpu_collision; +#ifdef CONFIG_RPS + struct softnet_data *rps_ipi_list; +#endif + unsigned int received_rps; + bool in_net_rx_action; + bool in_napi_threaded_poll; +#ifdef CONFIG_NET_FLOW_LIMIT + struct sd_flow_limit __rcu *flow_limit; +#endif + struct Qdisc *output_queue; + struct Qdisc **output_queue_tailp; + struct sk_buff *completion_queue; +#ifdef CONFIG_XFRM_OFFLOAD + struct sk_buff_head xfrm_backlog; +#endif + /* written and read only by owning cpu: */ + struct netdev_xmit xmit; #ifdef CONFIG_RPS - struct softnet_data *rps_ipi_list; + /* input_queue_head should be written by cpu owning this struct, + * and only read by other cpus. Worth using a cache line. + */ + unsigned int input_queue_head ____cacheline_aligned_in_smp; - /* Elements below can be accessed between CPUs for RPS */ - struct call_single_data csd ____cacheline_aligned_in_smp; + /* Elements below can be accessed between CPUs for RPS/RFS */ + call_single_data_t csd ____cacheline_aligned_in_smp; struct softnet_data *rps_ipi_next; unsigned int cpu; - unsigned int input_queue_head; + + /* We force a cacheline alignment from here, to hold together + * input_queue_tail, input_pkt_queue and backlog.state. + * We add holes so that backlog.state is the last field + * of this cache line. + */ + long pad[3] ____cacheline_aligned_in_smp; unsigned int input_queue_tail; #endif - unsigned int dropped; struct sk_buff_head input_pkt_queue; + struct napi_struct backlog; -#ifdef CONFIG_NET_FLOW_LIMIT - struct sd_flow_limit __rcu *flow_limit; -#endif + struct numa_drop_counters drop_counters; + + int defer_ipi_scheduled ____cacheline_aligned_in_smp; + call_single_data_t defer_csd; }; -static inline void input_queue_head_incr(struct softnet_data *sd) +DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); + +struct page_pool_bh { + struct page_pool *pool; + local_lock_t bh_lock; +}; +DECLARE_PER_CPU(struct page_pool_bh, system_page_pool); + +#ifndef CONFIG_PREEMPT_RT +static inline int dev_recursion_level(void) { -#ifdef CONFIG_RPS - sd->input_queue_head++; -#endif + return this_cpu_read(softnet_data.xmit.recursion); } - -static inline void input_queue_tail_incr_save(struct softnet_data *sd, - unsigned int *qtail) +#else +static inline int dev_recursion_level(void) { -#ifdef CONFIG_RPS - *qtail = ++sd->input_queue_tail; -#endif + return current->net_xmit.recursion; } -DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); - -extern void __netif_schedule(struct Qdisc *q); +#endif -static inline void netif_schedule_queue(struct netdev_queue *txq) -{ - if (!(txq->state & QUEUE_STATE_ANY_XOFF)) - __netif_schedule(txq->qdisc); -} +void __netif_schedule(struct Qdisc *q); +void netif_schedule_queue(struct netdev_queue *txq); static inline void netif_tx_schedule_all(struct net_device *dev) { @@ -1924,7 +3597,7 @@ static inline void netif_tx_schedule_all(struct net_device *dev) netif_schedule_queue(netdev_get_tx_queue(dev, i)); } -static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) +static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) { clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); } @@ -1950,17 +3623,7 @@ static inline void netif_tx_start_all_queues(struct net_device *dev) } } -static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) -{ -#ifdef CONFIG_NETPOLL_TRAP - if (netpoll_trap()) { - netif_tx_start_queue(dev_queue); - return; - } -#endif - if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) - __netif_schedule(dev_queue->qdisc); -} +void netif_tx_wake_queue(struct netdev_queue *dev_queue); /** * netif_wake_queue - restart transmit @@ -1984,12 +3647,15 @@ static inline void netif_tx_wake_all_queues(struct net_device *dev) } } -static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) +static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) { - if (WARN_ON(!dev_queue)) { - pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); - return; - } + /* Paired with READ_ONCE() from dev_watchdog() */ + WRITE_ONCE(dev_queue->trans_start, jiffies); + + /* This barrier is paired with smp_mb() from dev_watchdog() */ + smp_mb__before_atomic(); + + /* Must be an atomic op see netif_txq_try_stop() */ set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); } @@ -2005,15 +3671,7 @@ static inline void netif_stop_queue(struct net_device *dev) netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); } -static inline void netif_tx_stop_all_queues(struct net_device *dev) -{ - unsigned int i; - - for (i = 0; i < dev->num_tx_queues; i++) { - struct netdev_queue *txq = netdev_get_tx_queue(dev, i); - netif_tx_stop_queue(txq); - } -} +void netif_tx_stop_all_queues(struct net_device *dev); static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) { @@ -2036,11 +3694,84 @@ static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) return dev_queue->state & QUEUE_STATE_ANY_XOFF; } -static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) +static inline bool +netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) { return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; } +static inline bool +netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) +{ + return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; +} + +/** + * netdev_queue_set_dql_min_limit - set dql minimum limit + * @dev_queue: pointer to transmit queue + * @min_limit: dql minimum limit + * + * Forces xmit_more() to return true until the minimum threshold + * defined by @min_limit is reached (or until the tx queue is + * empty). Warning: to be use with care, misuse will impact the + * latency. + */ +static inline void netdev_queue_set_dql_min_limit(struct netdev_queue *dev_queue, + unsigned int min_limit) +{ +#ifdef CONFIG_BQL + dev_queue->dql.min_limit = min_limit; +#endif +} + +static inline int netdev_queue_dql_avail(const struct netdev_queue *txq) +{ +#ifdef CONFIG_BQL + /* Non-BQL migrated drivers will return 0, too. */ + return dql_avail(&txq->dql); +#else + return 0; +#endif +} + +/** + * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write + * @dev_queue: pointer to transmit queue + * + * BQL enabled drivers might use this helper in their ndo_start_xmit(), + * to give appropriate hint to the CPU. + */ +static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) +{ +#ifdef CONFIG_BQL + prefetchw(&dev_queue->dql.num_queued); +#endif +} + +/** + * netdev_txq_bql_complete_prefetchw - prefetch bql data for write + * @dev_queue: pointer to transmit queue + * + * BQL enabled drivers might use this helper in their TX completion path, + * to give appropriate hint to the CPU. + */ +static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) +{ +#ifdef CONFIG_BQL + prefetchw(&dev_queue->dql.limit); +#endif +} + +/** + * netdev_tx_sent_queue - report the number of bytes queued to a given tx queue + * @dev_queue: network device queue + * @bytes: number of bytes queued to the device queue + * + * Report the number of bytes queued for sending/completion to the network + * device hardware queue. @bytes should be a good approximation and should + * exactly match netdev_completed_queue() @bytes. + * This is typically called once per packet, from ndo_start_xmit(). + */ static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, unsigned int bytes) { @@ -2050,6 +3781,12 @@ static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, if (likely(dql_avail(&dev_queue->dql) >= 0)) return; + /* Paired with READ_ONCE() from dev_watchdog() */ + WRITE_ONCE(dev_queue->trans_start, jiffies); + + /* This barrier is paired with smp_mb() from dev_watchdog() */ + smp_mb__before_atomic(); + set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); /* @@ -2057,7 +3794,7 @@ static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, * because in netdev_tx_completed_queue we update the dql_completed * before checking the XOFF flag. */ - smp_mb(); + smp_mb__after_atomic(); /* check again in case another CPU has just made room avail */ if (unlikely(dql_avail(&dev_queue->dql) >= 0)) @@ -2065,11 +3802,58 @@ static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, #endif } +/* Variant of netdev_tx_sent_queue() for drivers that are aware + * that they should not test BQL status themselves. + * We do want to change __QUEUE_STATE_STACK_XOFF only for the last + * skb of a batch. + * Returns true if the doorbell must be used to kick the NIC. + */ +static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue, + unsigned int bytes, + bool xmit_more) +{ + if (xmit_more) { +#ifdef CONFIG_BQL + dql_queued(&dev_queue->dql, bytes); +#endif + return netif_tx_queue_stopped(dev_queue); + } + netdev_tx_sent_queue(dev_queue, bytes); + return true; +} + +/** + * netdev_sent_queue - report the number of bytes queued to hardware + * @dev: network device + * @bytes: number of bytes queued to the hardware device queue + * + * Report the number of bytes queued for sending/completion to the network + * device hardware queue#0. @bytes should be a good approximation and should + * exactly match netdev_completed_queue() @bytes. + * This is typically called once per packet, from ndo_start_xmit(). + */ static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) { netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); } +static inline bool __netdev_sent_queue(struct net_device *dev, + unsigned int bytes, + bool xmit_more) +{ + return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes, + xmit_more); +} + +/** + * netdev_tx_completed_queue - report number of packets/bytes at TX completion. + * @dev_queue: network device queue + * @pkts: number of packets (currently ignored) + * @bytes: number of bytes dequeued from the device queue + * + * Must be called at most once per TX completion round (and not per + * individual packet), so that BQL can adjust its limits appropriately. + */ static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, unsigned int pkts, unsigned int bytes) { @@ -2080,13 +3864,13 @@ static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, dql_completed(&dev_queue->dql, bytes); /* - * Without the memory barrier there is a small possiblity that + * Without the memory barrier there is a small possibility that * netdev_tx_sent_queue will miss the update and cause the queue to * be stopped forever */ - smp_mb(); + smp_mb(); /* NOTE: netdev_txq_completed_mb() assumes this exists */ - if (dql_avail(&dev_queue->dql) < 0) + if (unlikely(dql_avail(&dev_queue->dql) < 0)) return; if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) @@ -2094,6 +3878,16 @@ static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, #endif } +/** + * netdev_completed_queue - report bytes and packets completed by device + * @dev: network device + * @pkts: actual number of packets sent over the medium + * @bytes: actual number of bytes sent over the medium + * + * Report the number of bytes and packets transmitted by the network device + * hardware queue over the physical medium, @bytes must exactly match the + * @bytes amount passed to netdev_sent_queue() + */ static inline void netdev_completed_queue(struct net_device *dev, unsigned int pkts, unsigned int bytes) { @@ -2108,9 +3902,47 @@ static inline void netdev_tx_reset_queue(struct netdev_queue *q) #endif } +/** + * netdev_tx_reset_subqueue - reset the BQL stats and state of a netdev queue + * @dev: network device + * @qid: stack index of the queue to reset + */ +static inline void netdev_tx_reset_subqueue(const struct net_device *dev, + u32 qid) +{ + netdev_tx_reset_queue(netdev_get_tx_queue(dev, qid)); +} + +/** + * netdev_reset_queue - reset the packets and bytes count of a network device + * @dev_queue: network device + * + * Reset the bytes and packet count of a network device and clear the + * software flow control OFF bit for this network device + */ static inline void netdev_reset_queue(struct net_device *dev_queue) { - netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); + netdev_tx_reset_subqueue(dev_queue, 0); +} + +/** + * netdev_cap_txqueue - check if selected tx queue exceeds device queues + * @dev: network device + * @queue_index: given tx queue index + * + * Returns 0 if given tx queue index >= number of device tx queues, + * otherwise returns the originally passed tx queue index. + */ +static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) +{ + if (unlikely(queue_index >= dev->real_num_tx_queues)) { + net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", + dev->name, queue_index, + dev->real_num_tx_queues); + return 0; + } + + return queue_index; } /** @@ -2125,7 +3957,7 @@ static inline bool netif_running(const struct net_device *dev) } /* - * Routines to manage the subqueues on a device. We only need start + * Routines to manage the subqueues on a device. We only need start, * stop, and a check if it's stopped. All other device management is * done at the overall netdevice level. * Also test the device if we're multiqueue. @@ -2155,15 +3987,11 @@ static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) { struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); -#ifdef CONFIG_NETPOLL_TRAP - if (netpoll_trap()) - return; -#endif netif_tx_stop_queue(txq); } /** - * netif_subqueue_stopped - test status of subqueue + * __netif_subqueue_stopped - test status of subqueue * @dev: network device * @queue_index: sub queue index * @@ -2177,6 +4005,13 @@ static inline bool __netif_subqueue_stopped(const struct net_device *dev, return netif_tx_queue_stopped(txq); } +/** + * netif_subqueue_stopped - test status of subqueue + * @dev: network device + * @skb: sub queue buffer pointer + * + * Check individual transmit queue of a device with multiple transmit queues. + */ static inline bool netif_subqueue_stopped(const struct net_device *dev, struct sk_buff *skb) { @@ -2193,35 +4028,116 @@ static inline bool netif_subqueue_stopped(const struct net_device *dev, static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) { struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); -#ifdef CONFIG_NETPOLL_TRAP - if (netpoll_trap()) - return; -#endif - if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) - __netif_schedule(txq->qdisc); + + netif_tx_wake_queue(txq); } #ifdef CONFIG_XPS -extern int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask, - u16 index); +int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, + u16 index); +int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask, + u16 index, enum xps_map_type type); + +/** + * netif_attr_test_mask - Test a CPU or Rx queue set in a mask + * @j: CPU/Rx queue index + * @mask: bitmask of all cpus/rx queues + * @nr_bits: number of bits in the bitmask + * + * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues. + */ +static inline bool netif_attr_test_mask(unsigned long j, + const unsigned long *mask, + unsigned int nr_bits) +{ + cpu_max_bits_warn(j, nr_bits); + return test_bit(j, mask); +} + +/** + * netif_attr_test_online - Test for online CPU/Rx queue + * @j: CPU/Rx queue index + * @online_mask: bitmask for CPUs/Rx queues that are online + * @nr_bits: number of bits in the bitmask + * + * Returns: true if a CPU/Rx queue is online. + */ +static inline bool netif_attr_test_online(unsigned long j, + const unsigned long *online_mask, + unsigned int nr_bits) +{ + cpu_max_bits_warn(j, nr_bits); + + if (online_mask) + return test_bit(j, online_mask); + + return (j < nr_bits); +} + +/** + * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask + * @n: CPU/Rx queue index + * @srcp: the cpumask/Rx queue mask pointer + * @nr_bits: number of bits in the bitmask + * + * Returns: next (after n) CPU/Rx queue index in the mask; + * >= nr_bits if no further CPUs/Rx queues set. + */ +static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp, + unsigned int nr_bits) +{ + /* -1 is a legal arg here. */ + if (n != -1) + cpu_max_bits_warn(n, nr_bits); + + if (srcp) + return find_next_bit(srcp, nr_bits, n + 1); + + return n + 1; +} + +/** + * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p + * @n: CPU/Rx queue index + * @src1p: the first CPUs/Rx queues mask pointer + * @src2p: the second CPUs/Rx queues mask pointer + * @nr_bits: number of bits in the bitmask + * + * Returns: next (after n) CPU/Rx queue index set in both masks; + * >= nr_bits if no further CPUs/Rx queues set in both. + */ +static inline int netif_attrmask_next_and(int n, const unsigned long *src1p, + const unsigned long *src2p, + unsigned int nr_bits) +{ + /* -1 is a legal arg here. */ + if (n != -1) + cpu_max_bits_warn(n, nr_bits); + + if (src1p && src2p) + return find_next_and_bit(src1p, src2p, nr_bits, n + 1); + else if (src1p) + return find_next_bit(src1p, nr_bits, n + 1); + else if (src2p) + return find_next_bit(src2p, nr_bits, n + 1); + + return n + 1; +} #else static inline int netif_set_xps_queue(struct net_device *dev, - struct cpumask *mask, + const struct cpumask *mask, u16 index) { return 0; } -#endif -/* - * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used - * as a distribution range limit for the returned value. - */ -static inline u16 skb_tx_hash(const struct net_device *dev, - const struct sk_buff *skb) +static inline int __netif_set_xps_queue(struct net_device *dev, + const unsigned long *mask, + u16 index, enum xps_map_type type) { - return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); + return 0; } +#endif /** * netif_is_multiqueue - test if device has multiple transmit queues @@ -2234,120 +4150,334 @@ static inline bool netif_is_multiqueue(const struct net_device *dev) return dev->num_tx_queues > 1; } -extern int netif_set_real_num_tx_queues(struct net_device *dev, - unsigned int txq); +int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); +int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); +int netif_set_real_num_queues(struct net_device *dev, + unsigned int txq, unsigned int rxq); -#ifdef CONFIG_RPS -extern int netif_set_real_num_rx_queues(struct net_device *dev, - unsigned int rxq); -#else -static inline int netif_set_real_num_rx_queues(struct net_device *dev, - unsigned int rxq) +int netif_get_num_default_rss_queues(void); + +void dev_kfree_skb_irq_reason(struct sk_buff *skb, enum skb_drop_reason reason); +void dev_kfree_skb_any_reason(struct sk_buff *skb, enum skb_drop_reason reason); + +/* + * It is not allowed to call kfree_skb() or consume_skb() from hardware + * interrupt context or with hardware interrupts being disabled. + * (in_hardirq() || irqs_disabled()) + * + * We provide four helpers that can be used in following contexts : + * + * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, + * replacing kfree_skb(skb) + * + * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. + * Typically used in place of consume_skb(skb) in TX completion path + * + * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, + * replacing kfree_skb(skb) + * + * dev_consume_skb_any(skb) when caller doesn't know its current irq context, + * and consumed a packet. Used in place of consume_skb(skb) + */ +static inline void dev_kfree_skb_irq(struct sk_buff *skb) +{ + dev_kfree_skb_irq_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED); +} + +static inline void dev_consume_skb_irq(struct sk_buff *skb) +{ + dev_kfree_skb_irq_reason(skb, SKB_CONSUMED); +} + +static inline void dev_kfree_skb_any(struct sk_buff *skb) +{ + dev_kfree_skb_any_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED); +} + +static inline void dev_consume_skb_any(struct sk_buff *skb) +{ + dev_kfree_skb_any_reason(skb, SKB_CONSUMED); +} + +u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp, + const struct bpf_prog *xdp_prog); +void generic_xdp_tx(struct sk_buff *skb, const struct bpf_prog *xdp_prog); +int do_xdp_generic(const struct bpf_prog *xdp_prog, struct sk_buff **pskb); +int netif_rx(struct sk_buff *skb); +int __netif_rx(struct sk_buff *skb); + +int netif_receive_skb(struct sk_buff *skb); +int netif_receive_skb_core(struct sk_buff *skb); +void netif_receive_skb_list_internal(struct list_head *head); +void netif_receive_skb_list(struct list_head *head); +gro_result_t gro_receive_skb(struct gro_node *gro, struct sk_buff *skb); + +static inline gro_result_t napi_gro_receive(struct napi_struct *napi, + struct sk_buff *skb) +{ + return gro_receive_skb(&napi->gro, skb); +} + +struct sk_buff *napi_get_frags(struct napi_struct *napi); +gro_result_t napi_gro_frags(struct napi_struct *napi); + +static inline void napi_free_frags(struct napi_struct *napi) +{ + kfree_skb(napi->skb); + napi->skb = NULL; +} + +bool netdev_is_rx_handler_busy(struct net_device *dev); +int netdev_rx_handler_register(struct net_device *dev, + rx_handler_func_t *rx_handler, + void *rx_handler_data); +void netdev_rx_handler_unregister(struct net_device *dev); + +bool dev_valid_name(const char *name); +static inline bool is_socket_ioctl_cmd(unsigned int cmd) +{ + return _IOC_TYPE(cmd) == SOCK_IOC_TYPE; +} +int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg); +int put_user_ifreq(struct ifreq *ifr, void __user *arg); +int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, + void __user *data, bool *need_copyout); +int dev_ifconf(struct net *net, struct ifconf __user *ifc); +int dev_eth_ioctl(struct net_device *dev, + struct ifreq *ifr, unsigned int cmd); +int generic_hwtstamp_get_lower(struct net_device *dev, + struct kernel_hwtstamp_config *kernel_cfg); +int generic_hwtstamp_set_lower(struct net_device *dev, + struct kernel_hwtstamp_config *kernel_cfg, + struct netlink_ext_ack *extack); +int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata); +unsigned int netif_get_flags(const struct net_device *dev); +int __dev_change_flags(struct net_device *dev, unsigned int flags, + struct netlink_ext_ack *extack); +int netif_change_flags(struct net_device *dev, unsigned int flags, + struct netlink_ext_ack *extack); +int dev_change_flags(struct net_device *dev, unsigned int flags, + struct netlink_ext_ack *extack); +int netif_set_alias(struct net_device *dev, const char *alias, size_t len); +int dev_set_alias(struct net_device *, const char *, size_t); +int dev_get_alias(const struct net_device *, char *, size_t); +int __dev_change_net_namespace(struct net_device *dev, struct net *net, + const char *pat, int new_ifindex, + struct netlink_ext_ack *extack); +int dev_change_net_namespace(struct net_device *dev, struct net *net, + const char *pat); +int __netif_set_mtu(struct net_device *dev, int new_mtu); +int netif_set_mtu(struct net_device *dev, int new_mtu); +int dev_set_mtu(struct net_device *, int); +int netif_pre_changeaddr_notify(struct net_device *dev, const char *addr, + struct netlink_ext_ack *extack); +int netif_set_mac_address(struct net_device *dev, struct sockaddr_storage *ss, + struct netlink_ext_ack *extack); +int dev_set_mac_address(struct net_device *dev, struct sockaddr_storage *ss, + struct netlink_ext_ack *extack); +int dev_set_mac_address_user(struct net_device *dev, struct sockaddr_storage *ss, + struct netlink_ext_ack *extack); +int netif_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name); +int netif_get_port_parent_id(struct net_device *dev, + struct netdev_phys_item_id *ppid, bool recurse); +bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b); + +struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again); +struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, + struct netdev_queue *txq, int *ret); + +int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); +u8 dev_xdp_prog_count(struct net_device *dev); +int netif_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf); +int dev_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf); +u8 dev_xdp_sb_prog_count(struct net_device *dev); +u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode); + +u32 dev_get_min_mp_channel_count(const struct net_device *dev); + +int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); +int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); +int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb); +bool is_skb_forwardable(const struct net_device *dev, + const struct sk_buff *skb); + +static __always_inline bool __is_skb_forwardable(const struct net_device *dev, + const struct sk_buff *skb, + const bool check_mtu) +{ + const u32 vlan_hdr_len = 4; /* VLAN_HLEN */ + unsigned int len; + + if (!(dev->flags & IFF_UP)) + return false; + + if (!check_mtu) + return true; + + len = dev->mtu + dev->hard_header_len + vlan_hdr_len; + if (skb->len <= len) + return true; + + /* if TSO is enabled, we don't care about the length as the packet + * could be forwarded without being segmented before + */ + if (skb_is_gso(skb)) + return true; + + return false; +} + +void netdev_core_stats_inc(struct net_device *dev, u32 offset); + +#define DEV_CORE_STATS_INC(FIELD) \ +static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev) \ +{ \ + netdev_core_stats_inc(dev, \ + offsetof(struct net_device_core_stats, FIELD)); \ +} +DEV_CORE_STATS_INC(rx_dropped) +DEV_CORE_STATS_INC(tx_dropped) +DEV_CORE_STATS_INC(rx_nohandler) +DEV_CORE_STATS_INC(rx_otherhost_dropped) +#undef DEV_CORE_STATS_INC + +static __always_inline int ____dev_forward_skb(struct net_device *dev, + struct sk_buff *skb, + const bool check_mtu) { + if (skb_orphan_frags(skb, GFP_ATOMIC) || + unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) { + dev_core_stats_rx_dropped_inc(dev); + kfree_skb(skb); + return NET_RX_DROP; + } + + skb_scrub_packet(skb, !net_eq(dev_net(dev), dev_net(skb->dev))); + skb->priority = 0; return 0; } -#endif -static inline int netif_copy_real_num_queues(struct net_device *to_dev, - const struct net_device *from_dev) +bool dev_nit_active_rcu(const struct net_device *dev); +static inline bool dev_nit_active(const struct net_device *dev) { - int err; + bool ret; - err = netif_set_real_num_tx_queues(to_dev, - from_dev->real_num_tx_queues); - if (err) - return err; -#ifdef CONFIG_RPS - return netif_set_real_num_rx_queues(to_dev, - from_dev->real_num_rx_queues); + rcu_read_lock(); + ret = dev_nit_active_rcu(dev); + rcu_read_unlock(); + return ret; +} + +void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); + +static inline void __dev_put(struct net_device *dev) +{ + if (dev) { +#ifdef CONFIG_PCPU_DEV_REFCNT + this_cpu_dec(*dev->pcpu_refcnt); #else - return 0; + refcount_dec(&dev->dev_refcnt); #endif + } } -#define DEFAULT_MAX_NUM_RSS_QUEUES (8) -extern int netif_get_num_default_rss_queues(void); +static inline void __dev_hold(struct net_device *dev) +{ + if (dev) { +#ifdef CONFIG_PCPU_DEV_REFCNT + this_cpu_inc(*dev->pcpu_refcnt); +#else + refcount_inc(&dev->dev_refcnt); +#endif + } +} -/* Use this variant when it is known for sure that it - * is executing from hardware interrupt context or with hardware interrupts - * disabled. - */ -extern void dev_kfree_skb_irq(struct sk_buff *skb); +static inline void __netdev_tracker_alloc(struct net_device *dev, + netdevice_tracker *tracker, + gfp_t gfp) +{ +#ifdef CONFIG_NET_DEV_REFCNT_TRACKER + ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp); +#endif +} -/* Use this variant in places where it could be invoked - * from either hardware interrupt or other context, with hardware interrupts - * either disabled or enabled. +/* netdev_tracker_alloc() can upgrade a prior untracked reference + * taken by dev_get_by_name()/dev_get_by_index() to a tracked one. */ -extern void dev_kfree_skb_any(struct sk_buff *skb); +static inline void netdev_tracker_alloc(struct net_device *dev, + netdevice_tracker *tracker, gfp_t gfp) +{ +#ifdef CONFIG_NET_DEV_REFCNT_TRACKER + refcount_dec(&dev->refcnt_tracker.no_tracker); + __netdev_tracker_alloc(dev, tracker, gfp); +#endif +} -extern int netif_rx(struct sk_buff *skb); -extern int netif_rx_ni(struct sk_buff *skb); -extern int netif_receive_skb(struct sk_buff *skb); -extern gro_result_t napi_gro_receive(struct napi_struct *napi, - struct sk_buff *skb); -extern void napi_gro_flush(struct napi_struct *napi, bool flush_old); -extern struct sk_buff * napi_get_frags(struct napi_struct *napi); -extern gro_result_t napi_gro_frags(struct napi_struct *napi); +static inline void netdev_tracker_free(struct net_device *dev, + netdevice_tracker *tracker) +{ +#ifdef CONFIG_NET_DEV_REFCNT_TRACKER + ref_tracker_free(&dev->refcnt_tracker, tracker); +#endif +} -static inline void napi_free_frags(struct napi_struct *napi) +static inline void netdev_hold(struct net_device *dev, + netdevice_tracker *tracker, gfp_t gfp) { - kfree_skb(napi->skb); - napi->skb = NULL; + if (dev) { + __dev_hold(dev); + __netdev_tracker_alloc(dev, tracker, gfp); + } } -extern int netdev_rx_handler_register(struct net_device *dev, - rx_handler_func_t *rx_handler, - void *rx_handler_data); -extern void netdev_rx_handler_unregister(struct net_device *dev); - -extern bool dev_valid_name(const char *name); -extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); -extern int dev_ethtool(struct net *net, struct ifreq *); -extern unsigned int dev_get_flags(const struct net_device *); -extern int __dev_change_flags(struct net_device *, unsigned int flags); -extern int dev_change_flags(struct net_device *, unsigned int); -extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); -extern int dev_change_name(struct net_device *, const char *); -extern int dev_set_alias(struct net_device *, const char *, size_t); -extern int dev_change_net_namespace(struct net_device *, - struct net *, const char *); -extern int dev_set_mtu(struct net_device *, int); -extern void dev_set_group(struct net_device *, int); -extern int dev_set_mac_address(struct net_device *, - struct sockaddr *); -extern int dev_change_carrier(struct net_device *, - bool new_carrier); -extern int dev_hard_start_xmit(struct sk_buff *skb, - struct net_device *dev, - struct netdev_queue *txq); -extern int dev_forward_skb(struct net_device *dev, - struct sk_buff *skb); - -extern int netdev_budget; - -/* Called by rtnetlink.c:rtnl_unlock() */ -extern void netdev_run_todo(void); +static inline void netdev_put(struct net_device *dev, + netdevice_tracker *tracker) +{ + if (dev) { + netdev_tracker_free(dev, tracker); + __dev_put(dev); + } +} /** - * dev_put - release reference to device + * dev_hold - get reference to device * @dev: network device * - * Release reference to device to allow it to be freed. + * Hold reference to device to keep it from being freed. + * Try using netdev_hold() instead. */ -static inline void dev_put(struct net_device *dev) +static inline void dev_hold(struct net_device *dev) { - this_cpu_dec(*dev->pcpu_refcnt); + netdev_hold(dev, NULL, GFP_ATOMIC); } /** - * dev_hold - get reference to device + * dev_put - release reference to device * @dev: network device * - * Hold reference to device to keep it from being freed. + * Release reference to device to allow it to be freed. + * Try using netdev_put() instead. */ -static inline void dev_hold(struct net_device *dev) +static inline void dev_put(struct net_device *dev) { - this_cpu_inc(*dev->pcpu_refcnt); + netdev_put(dev, NULL); +} + +DEFINE_FREE(dev_put, struct net_device *, if (_T) dev_put(_T)) + +static inline void netdev_ref_replace(struct net_device *odev, + struct net_device *ndev, + netdevice_tracker *tracker, + gfp_t gfp) +{ + if (odev) + netdev_tracker_free(odev, tracker); + + __dev_hold(ndev); + __dev_put(odev); + + if (ndev) + __netdev_tracker_alloc(ndev, tracker, gfp); } /* Carrier loss detection, dial on demand. The functions netif_carrier_on @@ -2358,10 +4488,17 @@ static inline void dev_hold(struct net_device *dev) * called netif_lowerlayer_*() because they represent the state of any * kind of lower layer not just hardware media. */ +void linkwatch_fire_event(struct net_device *dev); -extern void linkwatch_init_dev(struct net_device *dev); -extern void linkwatch_fire_event(struct net_device *dev); -extern void linkwatch_forget_dev(struct net_device *dev); +/** + * linkwatch_sync_dev - sync linkwatch for the given device + * @dev: network device to sync linkwatch for + * + * Sync linkwatch for the given device, removing it from the + * pending work list (if queued). + */ +void linkwatch_sync_dev(struct net_device *dev); +void __linkwatch_sync_dev(struct net_device *dev); /** * netif_carrier_ok - test if carrier present @@ -2374,13 +4511,13 @@ static inline bool netif_carrier_ok(const struct net_device *dev) return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); } -extern unsigned long dev_trans_start(struct net_device *dev); +unsigned long dev_trans_start(struct net_device *dev); -extern void __netdev_watchdog_up(struct net_device *dev); +void netdev_watchdog_up(struct net_device *dev); -extern void netif_carrier_on(struct net_device *dev); - -extern void netif_carrier_off(struct net_device *dev); +void netif_carrier_on(struct net_device *dev); +void netif_carrier_off(struct net_device *dev); +void netif_carrier_event(struct net_device *dev); /** * netif_dormant_on - mark device as dormant. @@ -2393,7 +4530,6 @@ extern void netif_carrier_off(struct net_device *dev); * in a "pending" state, waiting for some external event. For "on- * demand" interfaces, this new state identifies the situation where the * interface is waiting for events to place it in the up state. - * */ static inline void netif_dormant_on(struct net_device *dev) { @@ -2414,10 +4550,10 @@ static inline void netif_dormant_off(struct net_device *dev) } /** - * netif_dormant - test if carrier present + * netif_dormant - test if device is dormant * @dev: network device * - * Check if carrier is present on device + * Check if device is dormant. */ static inline bool netif_dormant(const struct net_device *dev) { @@ -2426,6 +4562,46 @@ static inline bool netif_dormant(const struct net_device *dev) /** + * netif_testing_on - mark device as under test. + * @dev: network device + * + * Mark device as under test (as per RFC2863). + * + * The testing state indicates that some test(s) must be performed on + * the interface. After completion, of the test, the interface state + * will change to up, dormant, or down, as appropriate. + */ +static inline void netif_testing_on(struct net_device *dev) +{ + if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state)) + linkwatch_fire_event(dev); +} + +/** + * netif_testing_off - set device as not under test. + * @dev: network device + * + * Device is not in testing state. + */ +static inline void netif_testing_off(struct net_device *dev) +{ + if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state)) + linkwatch_fire_event(dev); +} + +/** + * netif_testing - test if device is under test + * @dev: network device + * + * Check if device is under test + */ +static inline bool netif_testing(const struct net_device *dev) +{ + return test_bit(__LINK_STATE_TESTING, &dev->state); +} + + +/** * netif_oper_up - test if device is operational * @dev: network device * @@ -2433,8 +4609,10 @@ static inline bool netif_dormant(const struct net_device *dev) */ static inline bool netif_oper_up(const struct net_device *dev) { - return (dev->operstate == IF_OPER_UP || - dev->operstate == IF_OPER_UNKNOWN /* backward compat */); + unsigned int operstate = READ_ONCE(dev->operstate); + + return operstate == IF_OPER_UP || + operstate == IF_OPER_UNKNOWN /* backward compat */; } /** @@ -2443,36 +4621,62 @@ static inline bool netif_oper_up(const struct net_device *dev) * * Check if device has not been removed from system. */ -static inline bool netif_device_present(struct net_device *dev) +static inline bool netif_device_present(const struct net_device *dev) { return test_bit(__LINK_STATE_PRESENT, &dev->state); } -extern void netif_device_detach(struct net_device *dev); +void netif_device_detach(struct net_device *dev); -extern void netif_device_attach(struct net_device *dev); +void netif_device_attach(struct net_device *dev); /* * Network interface message level settings */ enum { - NETIF_MSG_DRV = 0x0001, - NETIF_MSG_PROBE = 0x0002, - NETIF_MSG_LINK = 0x0004, - NETIF_MSG_TIMER = 0x0008, - NETIF_MSG_IFDOWN = 0x0010, - NETIF_MSG_IFUP = 0x0020, - NETIF_MSG_RX_ERR = 0x0040, - NETIF_MSG_TX_ERR = 0x0080, - NETIF_MSG_TX_QUEUED = 0x0100, - NETIF_MSG_INTR = 0x0200, - NETIF_MSG_TX_DONE = 0x0400, - NETIF_MSG_RX_STATUS = 0x0800, - NETIF_MSG_PKTDATA = 0x1000, - NETIF_MSG_HW = 0x2000, - NETIF_MSG_WOL = 0x4000, + NETIF_MSG_DRV_BIT, + NETIF_MSG_PROBE_BIT, + NETIF_MSG_LINK_BIT, + NETIF_MSG_TIMER_BIT, + NETIF_MSG_IFDOWN_BIT, + NETIF_MSG_IFUP_BIT, + NETIF_MSG_RX_ERR_BIT, + NETIF_MSG_TX_ERR_BIT, + NETIF_MSG_TX_QUEUED_BIT, + NETIF_MSG_INTR_BIT, + NETIF_MSG_TX_DONE_BIT, + NETIF_MSG_RX_STATUS_BIT, + NETIF_MSG_PKTDATA_BIT, + NETIF_MSG_HW_BIT, + NETIF_MSG_WOL_BIT, + + /* When you add a new bit above, update netif_msg_class_names array + * in net/ethtool/common.c + */ + NETIF_MSG_CLASS_COUNT, }; +/* Both ethtool_ops interface and internal driver implementation use u32 */ +static_assert(NETIF_MSG_CLASS_COUNT <= 32); + +#define __NETIF_MSG_BIT(bit) ((u32)1 << (bit)) +#define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT) + +#define NETIF_MSG_DRV __NETIF_MSG(DRV) +#define NETIF_MSG_PROBE __NETIF_MSG(PROBE) +#define NETIF_MSG_LINK __NETIF_MSG(LINK) +#define NETIF_MSG_TIMER __NETIF_MSG(TIMER) +#define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN) +#define NETIF_MSG_IFUP __NETIF_MSG(IFUP) +#define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR) +#define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR) +#define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED) +#define NETIF_MSG_INTR __NETIF_MSG(INTR) +#define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE) +#define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS) +#define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA) +#define NETIF_MSG_HW __NETIF_MSG(HW) +#define NETIF_MSG_WOL __NETIF_MSG(WOL) #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) @@ -2498,45 +4702,83 @@ static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) if (debug_value == 0) /* no output */ return 0; /* set low N bits */ - return (1 << debug_value) - 1; + return (1U << debug_value) - 1; } static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) { spin_lock(&txq->_xmit_lock); - txq->xmit_lock_owner = cpu; + /* Pairs with READ_ONCE() in __dev_queue_xmit() */ + WRITE_ONCE(txq->xmit_lock_owner, cpu); +} + +static inline bool __netif_tx_acquire(struct netdev_queue *txq) +{ + __acquire(&txq->_xmit_lock); + return true; +} + +static inline void __netif_tx_release(struct netdev_queue *txq) +{ + __release(&txq->_xmit_lock); } static inline void __netif_tx_lock_bh(struct netdev_queue *txq) { spin_lock_bh(&txq->_xmit_lock); - txq->xmit_lock_owner = smp_processor_id(); + /* Pairs with READ_ONCE() in __dev_queue_xmit() */ + WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id()); } static inline bool __netif_tx_trylock(struct netdev_queue *txq) { bool ok = spin_trylock(&txq->_xmit_lock); - if (likely(ok)) - txq->xmit_lock_owner = smp_processor_id(); + + if (likely(ok)) { + /* Pairs with READ_ONCE() in __dev_queue_xmit() */ + WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id()); + } return ok; } static inline void __netif_tx_unlock(struct netdev_queue *txq) { - txq->xmit_lock_owner = -1; + /* Pairs with READ_ONCE() in __dev_queue_xmit() */ + WRITE_ONCE(txq->xmit_lock_owner, -1); spin_unlock(&txq->_xmit_lock); } static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) { - txq->xmit_lock_owner = -1; + /* Pairs with READ_ONCE() in __dev_queue_xmit() */ + WRITE_ONCE(txq->xmit_lock_owner, -1); spin_unlock_bh(&txq->_xmit_lock); } -static inline void txq_trans_update(struct netdev_queue *txq) +/* + * txq->trans_start can be read locklessly from dev_watchdog() + */ +static inline void txq_trans_update(const struct net_device *dev, + struct netdev_queue *txq) +{ + if (!dev->lltx) + WRITE_ONCE(txq->trans_start, jiffies); +} + +static inline void txq_trans_cond_update(struct netdev_queue *txq) { - if (txq->xmit_lock_owner != -1) - txq->trans_start = jiffies; + unsigned long now = jiffies; + + if (READ_ONCE(txq->trans_start) != now) + WRITE_ONCE(txq->trans_start, now); +} + +/* legacy drivers only, netdev_start_xmit() sets txq->trans_start */ +static inline void netif_trans_update(struct net_device *dev) +{ + struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); + + txq_trans_cond_update(txq); } /** @@ -2545,27 +4787,7 @@ static inline void txq_trans_update(struct netdev_queue *txq) * * Get network device transmit lock */ -static inline void netif_tx_lock(struct net_device *dev) -{ - unsigned int i; - int cpu; - - spin_lock(&dev->tx_global_lock); - cpu = smp_processor_id(); - for (i = 0; i < dev->num_tx_queues; i++) { - struct netdev_queue *txq = netdev_get_tx_queue(dev, i); - - /* We are the only thread of execution doing a - * freeze, but we have to grab the _xmit_lock in - * order to synchronize with threads which are in - * the ->hard_start_xmit() handler and already - * checked the frozen bit. - */ - __netif_tx_lock(txq, cpu); - set_bit(__QUEUE_STATE_FROZEN, &txq->state); - __netif_tx_unlock(txq); - } -} +void netif_tx_lock(struct net_device *dev); static inline void netif_tx_lock_bh(struct net_device *dev) { @@ -2573,22 +4795,7 @@ static inline void netif_tx_lock_bh(struct net_device *dev) netif_tx_lock(dev); } -static inline void netif_tx_unlock(struct net_device *dev) -{ - unsigned int i; - - for (i = 0; i < dev->num_tx_queues; i++) { - struct netdev_queue *txq = netdev_get_tx_queue(dev, i); - - /* No need to grab the _xmit_lock here. If the - * queue is not stopped for another reason, we - * force a schedule. - */ - clear_bit(__QUEUE_STATE_FROZEN, &txq->state); - netif_schedule_queue(txq); - } - spin_unlock(&dev->tx_global_lock); -} +void netif_tx_unlock(struct net_device *dev); static inline void netif_tx_unlock_bh(struct net_device *dev) { @@ -2597,14 +4804,23 @@ static inline void netif_tx_unlock_bh(struct net_device *dev) } #define HARD_TX_LOCK(dev, txq, cpu) { \ - if ((dev->features & NETIF_F_LLTX) == 0) { \ + if (!(dev)->lltx) { \ __netif_tx_lock(txq, cpu); \ + } else { \ + __netif_tx_acquire(txq); \ } \ } +#define HARD_TX_TRYLOCK(dev, txq) \ + (!(dev)->lltx ? \ + __netif_tx_trylock(txq) : \ + __netif_tx_acquire(txq)) + #define HARD_TX_UNLOCK(dev, txq) { \ - if ((dev->features & NETIF_F_LLTX) == 0) { \ + if (!(dev)->lltx) { \ __netif_tx_unlock(txq); \ + } else { \ + __netif_tx_release(txq); \ } \ } @@ -2615,6 +4831,7 @@ static inline void netif_tx_disable(struct net_device *dev) local_bh_disable(); cpu = smp_processor_id(); + spin_lock(&dev->tx_global_lock); for (i = 0; i < dev->num_tx_queues; i++) { struct netdev_queue *txq = netdev_get_tx_queue(dev, i); @@ -2622,22 +4839,29 @@ static inline void netif_tx_disable(struct net_device *dev) netif_tx_stop_queue(txq); __netif_tx_unlock(txq); } + spin_unlock(&dev->tx_global_lock); local_bh_enable(); } static inline void netif_addr_lock(struct net_device *dev) { - spin_lock(&dev->addr_list_lock); -} + unsigned char nest_level = 0; -static inline void netif_addr_lock_nested(struct net_device *dev) -{ - spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); +#ifdef CONFIG_LOCKDEP + nest_level = dev->nested_level; +#endif + spin_lock_nested(&dev->addr_list_lock, nest_level); } static inline void netif_addr_lock_bh(struct net_device *dev) { - spin_lock_bh(&dev->addr_list_lock); + unsigned char nest_level = 0; + +#ifdef CONFIG_LOCKDEP + nest_level = dev->nested_level; +#endif + local_bh_disable(); + spin_lock_nested(&dev->addr_list_lock, nest_level); } static inline void netif_addr_unlock(struct net_device *dev) @@ -2659,154 +4883,430 @@ static inline void netif_addr_unlock_bh(struct net_device *dev) /* These functions live elsewhere (drivers/net/net_init.c, but related) */ -extern void ether_setup(struct net_device *dev); +void ether_setup(struct net_device *dev); + +/* Allocate dummy net_device */ +struct net_device *alloc_netdev_dummy(int sizeof_priv); /* Support for loadable net-drivers */ -extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, - void (*setup)(struct net_device *), - unsigned int txqs, unsigned int rxqs); -#define alloc_netdev(sizeof_priv, name, setup) \ - alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) +struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, + unsigned char name_assign_type, + void (*setup)(struct net_device *), + unsigned int txqs, unsigned int rxqs); +#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ + alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) + +#define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ + alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ + count) -#define alloc_netdev_mq(sizeof_priv, name, setup, count) \ - alloc_netdev_mqs(sizeof_priv, name, setup, count, count) +int register_netdev(struct net_device *dev); +void unregister_netdev(struct net_device *dev); -extern int register_netdev(struct net_device *dev); -extern void unregister_netdev(struct net_device *dev); +int devm_register_netdev(struct device *dev, struct net_device *ndev); /* General hardware address lists handling functions */ -extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, - struct netdev_hw_addr_list *from_list, - int addr_len, unsigned char addr_type); -extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, - struct netdev_hw_addr_list *from_list, - int addr_len, unsigned char addr_type); -extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, - struct netdev_hw_addr_list *from_list, - int addr_len); -extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, - struct netdev_hw_addr_list *from_list, - int addr_len); -extern void __hw_addr_flush(struct netdev_hw_addr_list *list); -extern void __hw_addr_init(struct netdev_hw_addr_list *list); +int __hw_addr_sync(struct netdev_hw_addr_list *to_list, + struct netdev_hw_addr_list *from_list, int addr_len); +int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, + struct netdev_hw_addr_list *from_list, + int addr_len); +void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, + struct netdev_hw_addr_list *from_list, int addr_len); +int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, + struct net_device *dev, + int (*sync)(struct net_device *, const unsigned char *), + int (*unsync)(struct net_device *, + const unsigned char *)); +int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list, + struct net_device *dev, + int (*sync)(struct net_device *, + const unsigned char *, int), + int (*unsync)(struct net_device *, + const unsigned char *, int)); +void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list, + struct net_device *dev, + int (*unsync)(struct net_device *, + const unsigned char *, int)); +void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, + struct net_device *dev, + int (*unsync)(struct net_device *, + const unsigned char *)); +void __hw_addr_init(struct netdev_hw_addr_list *list); /* Functions used for device addresses handling */ -extern int dev_addr_add(struct net_device *dev, const unsigned char *addr, - unsigned char addr_type); -extern int dev_addr_del(struct net_device *dev, const unsigned char *addr, - unsigned char addr_type); -extern int dev_addr_add_multiple(struct net_device *to_dev, - struct net_device *from_dev, - unsigned char addr_type); -extern int dev_addr_del_multiple(struct net_device *to_dev, - struct net_device *from_dev, - unsigned char addr_type); -extern void dev_addr_flush(struct net_device *dev); -extern int dev_addr_init(struct net_device *dev); +void dev_addr_mod(struct net_device *dev, unsigned int offset, + const void *addr, size_t len); + +static inline void +__dev_addr_set(struct net_device *dev, const void *addr, size_t len) +{ + dev_addr_mod(dev, 0, addr, len); +} + +static inline void dev_addr_set(struct net_device *dev, const u8 *addr) +{ + __dev_addr_set(dev, addr, dev->addr_len); +} + +int dev_addr_add(struct net_device *dev, const unsigned char *addr, + unsigned char addr_type); +int dev_addr_del(struct net_device *dev, const unsigned char *addr, + unsigned char addr_type); /* Functions used for unicast addresses handling */ -extern int dev_uc_add(struct net_device *dev, const unsigned char *addr); -extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); -extern int dev_uc_del(struct net_device *dev, const unsigned char *addr); -extern int dev_uc_sync(struct net_device *to, struct net_device *from); -extern int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); -extern void dev_uc_unsync(struct net_device *to, struct net_device *from); -extern void dev_uc_flush(struct net_device *dev); -extern void dev_uc_init(struct net_device *dev); +int dev_uc_add(struct net_device *dev, const unsigned char *addr); +int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); +int dev_uc_del(struct net_device *dev, const unsigned char *addr); +int dev_uc_sync(struct net_device *to, struct net_device *from); +int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); +void dev_uc_unsync(struct net_device *to, struct net_device *from); +void dev_uc_flush(struct net_device *dev); +void dev_uc_init(struct net_device *dev); + +/** + * __dev_uc_sync - Synchronize device's unicast list + * @dev: device to sync + * @sync: function to call if address should be added + * @unsync: function to call if address should be removed + * + * Add newly added addresses to the interface, and release + * addresses that have been deleted. + */ +static inline int __dev_uc_sync(struct net_device *dev, + int (*sync)(struct net_device *, + const unsigned char *), + int (*unsync)(struct net_device *, + const unsigned char *)) +{ + return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); +} + +/** + * __dev_uc_unsync - Remove synchronized addresses from device + * @dev: device to sync + * @unsync: function to call if address should be removed + * + * Remove all addresses that were added to the device by dev_uc_sync(). + */ +static inline void __dev_uc_unsync(struct net_device *dev, + int (*unsync)(struct net_device *, + const unsigned char *)) +{ + __hw_addr_unsync_dev(&dev->uc, dev, unsync); +} /* Functions used for multicast addresses handling */ -extern int dev_mc_add(struct net_device *dev, const unsigned char *addr); -extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); -extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); -extern int dev_mc_del(struct net_device *dev, const unsigned char *addr); -extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); -extern int dev_mc_sync(struct net_device *to, struct net_device *from); -extern int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); -extern void dev_mc_unsync(struct net_device *to, struct net_device *from); -extern void dev_mc_flush(struct net_device *dev); -extern void dev_mc_init(struct net_device *dev); +int dev_mc_add(struct net_device *dev, const unsigned char *addr); +int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); +int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); +int dev_mc_del(struct net_device *dev, const unsigned char *addr); +int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); +int dev_mc_sync(struct net_device *to, struct net_device *from); +int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); +void dev_mc_unsync(struct net_device *to, struct net_device *from); +void dev_mc_flush(struct net_device *dev); +void dev_mc_init(struct net_device *dev); + +/** + * __dev_mc_sync - Synchronize device's multicast list + * @dev: device to sync + * @sync: function to call if address should be added + * @unsync: function to call if address should be removed + * + * Add newly added addresses to the interface, and release + * addresses that have been deleted. + */ +static inline int __dev_mc_sync(struct net_device *dev, + int (*sync)(struct net_device *, + const unsigned char *), + int (*unsync)(struct net_device *, + const unsigned char *)) +{ + return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); +} + +/** + * __dev_mc_unsync - Remove synchronized addresses from device + * @dev: device to sync + * @unsync: function to call if address should be removed + * + * Remove all addresses that were added to the device by dev_mc_sync(). + */ +static inline void __dev_mc_unsync(struct net_device *dev, + int (*unsync)(struct net_device *, + const unsigned char *)) +{ + __hw_addr_unsync_dev(&dev->mc, dev, unsync); +} /* Functions used for secondary unicast and multicast support */ -extern void dev_set_rx_mode(struct net_device *dev); -extern void __dev_set_rx_mode(struct net_device *dev); -extern int dev_set_promiscuity(struct net_device *dev, int inc); -extern int dev_set_allmulti(struct net_device *dev, int inc); -extern void netdev_state_change(struct net_device *dev); -extern void netdev_notify_peers(struct net_device *dev); -extern void netdev_features_change(struct net_device *dev); +void dev_set_rx_mode(struct net_device *dev); +int netif_set_promiscuity(struct net_device *dev, int inc); +int dev_set_promiscuity(struct net_device *dev, int inc); +int netif_set_allmulti(struct net_device *dev, int inc, bool notify); +int dev_set_allmulti(struct net_device *dev, int inc); +void netif_state_change(struct net_device *dev); +void netdev_state_change(struct net_device *dev); +void __netdev_notify_peers(struct net_device *dev); +void netdev_notify_peers(struct net_device *dev); +void netdev_features_change(struct net_device *dev); /* Load a device via the kmod */ -extern void dev_load(struct net *net, const char *name); -extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, - struct rtnl_link_stats64 *storage); -extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, - const struct net_device_stats *netdev_stats); - -extern int netdev_max_backlog; -extern int netdev_tstamp_prequeue; -extern int weight_p; -extern int bpf_jit_enable; - -extern bool netdev_has_upper_dev(struct net_device *dev, - struct net_device *upper_dev); -extern bool netdev_has_any_upper_dev(struct net_device *dev); -extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev); -extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); -extern int netdev_upper_dev_link(struct net_device *dev, - struct net_device *upper_dev); -extern int netdev_master_upper_dev_link(struct net_device *dev, - struct net_device *upper_dev); -extern void netdev_upper_dev_unlink(struct net_device *dev, - struct net_device *upper_dev); -extern int skb_checksum_help(struct sk_buff *skb); -extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb, - netdev_features_t features, bool tx_path); -extern struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, - netdev_features_t features); +void dev_load(struct net *net, const char *name); +struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, + struct rtnl_link_stats64 *storage); +void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, + const struct net_device_stats *netdev_stats); +void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s, + const struct pcpu_sw_netstats __percpu *netstats); +void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s); -static inline -struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) +enum { + NESTED_SYNC_IMM_BIT, + NESTED_SYNC_TODO_BIT, +}; + +#define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit)) +#define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT) + +#define NESTED_SYNC_IMM __NESTED_SYNC(IMM) +#define NESTED_SYNC_TODO __NESTED_SYNC(TODO) + +struct netdev_nested_priv { + unsigned char flags; + void *data; +}; + +bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); +struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, + struct list_head **iter); + +/* iterate through upper list, must be called under RCU read lock */ +#define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ + for (iter = &(dev)->adj_list.upper, \ + updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ + updev; \ + updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) + +int netdev_walk_all_upper_dev_rcu(struct net_device *dev, + int (*fn)(struct net_device *upper_dev, + struct netdev_nested_priv *priv), + struct netdev_nested_priv *priv); + +bool netdev_has_upper_dev_all_rcu(struct net_device *dev, + struct net_device *upper_dev); + +bool netdev_has_any_upper_dev(struct net_device *dev); + +void *netdev_lower_get_next_private(struct net_device *dev, + struct list_head **iter); +void *netdev_lower_get_next_private_rcu(struct net_device *dev, + struct list_head **iter); + +#define netdev_for_each_lower_private(dev, priv, iter) \ + for (iter = (dev)->adj_list.lower.next, \ + priv = netdev_lower_get_next_private(dev, &(iter)); \ + priv; \ + priv = netdev_lower_get_next_private(dev, &(iter))) + +#define netdev_for_each_lower_private_rcu(dev, priv, iter) \ + for (iter = &(dev)->adj_list.lower, \ + priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ + priv; \ + priv = netdev_lower_get_next_private_rcu(dev, &(iter))) + +void *netdev_lower_get_next(struct net_device *dev, + struct list_head **iter); + +#define netdev_for_each_lower_dev(dev, ldev, iter) \ + for (iter = (dev)->adj_list.lower.next, \ + ldev = netdev_lower_get_next(dev, &(iter)); \ + ldev; \ + ldev = netdev_lower_get_next(dev, &(iter))) + +struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev, + struct list_head **iter); +int netdev_walk_all_lower_dev(struct net_device *dev, + int (*fn)(struct net_device *lower_dev, + struct netdev_nested_priv *priv), + struct netdev_nested_priv *priv); +int netdev_walk_all_lower_dev_rcu(struct net_device *dev, + int (*fn)(struct net_device *lower_dev, + struct netdev_nested_priv *priv), + struct netdev_nested_priv *priv); + +void *netdev_adjacent_get_private(struct list_head *adj_list); +void *netdev_lower_get_first_private_rcu(struct net_device *dev); +struct net_device *netdev_master_upper_dev_get(struct net_device *dev); +struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); +int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev, + struct netlink_ext_ack *extack); +int netdev_master_upper_dev_link(struct net_device *dev, + struct net_device *upper_dev, + void *upper_priv, void *upper_info, + struct netlink_ext_ack *extack); +void netdev_upper_dev_unlink(struct net_device *dev, + struct net_device *upper_dev); +int netdev_adjacent_change_prepare(struct net_device *old_dev, + struct net_device *new_dev, + struct net_device *dev, + struct netlink_ext_ack *extack); +void netdev_adjacent_change_commit(struct net_device *old_dev, + struct net_device *new_dev, + struct net_device *dev); +void netdev_adjacent_change_abort(struct net_device *old_dev, + struct net_device *new_dev, + struct net_device *dev); +void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); +void *netdev_lower_dev_get_private(struct net_device *dev, + struct net_device *lower_dev); +void netdev_lower_state_changed(struct net_device *lower_dev, + void *lower_state_info); + +/* RSS keys are 40 or 52 bytes long */ +#define NETDEV_RSS_KEY_LEN 52 +extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; +void netdev_rss_key_fill(void *buffer, size_t len); + +int skb_checksum_help(struct sk_buff *skb); +int skb_crc32c_csum_help(struct sk_buff *skb); +int skb_csum_hwoffload_help(struct sk_buff *skb, + const netdev_features_t features); + +struct netdev_bonding_info { + ifslave slave; + ifbond master; +}; + +struct netdev_notifier_bonding_info { + struct netdev_notifier_info info; /* must be first */ + struct netdev_bonding_info bonding_info; +}; + +void netdev_bonding_info_change(struct net_device *dev, + struct netdev_bonding_info *bonding_info); + +#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK) +void ethtool_notify(struct net_device *dev, unsigned int cmd); +#else +static inline void ethtool_notify(struct net_device *dev, unsigned int cmd) { - return __skb_gso_segment(skb, features, true); } -__be16 skb_network_protocol(struct sk_buff *skb); +#endif + +__be16 skb_network_protocol(struct sk_buff *skb, int *depth); static inline bool can_checksum_protocol(netdev_features_t features, __be16 protocol) { - return ((features & NETIF_F_GEN_CSUM) || - ((features & NETIF_F_V4_CSUM) && - protocol == htons(ETH_P_IP)) || - ((features & NETIF_F_V6_CSUM) && - protocol == htons(ETH_P_IPV6)) || - ((features & NETIF_F_FCOE_CRC) && - protocol == htons(ETH_P_FCOE))); + if (protocol == htons(ETH_P_FCOE)) + return !!(features & NETIF_F_FCOE_CRC); + + /* Assume this is an IP checksum (not SCTP CRC) */ + + if (features & NETIF_F_HW_CSUM) { + /* Can checksum everything */ + return true; + } + + switch (protocol) { + case htons(ETH_P_IP): + return !!(features & NETIF_F_IP_CSUM); + case htons(ETH_P_IPV6): + return !!(features & NETIF_F_IPV6_CSUM); + default: + return false; + } } #ifdef CONFIG_BUG -extern void netdev_rx_csum_fault(struct net_device *dev); +void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb); #else -static inline void netdev_rx_csum_fault(struct net_device *dev) +static inline void netdev_rx_csum_fault(struct net_device *dev, + struct sk_buff *skb) { } #endif /* rx skb timestamps */ -extern void net_enable_timestamp(void); -extern void net_disable_timestamp(void); +void net_enable_timestamp(void); +void net_disable_timestamp(void); + +static inline ktime_t netdev_get_tstamp(struct net_device *dev, + const struct skb_shared_hwtstamps *hwtstamps, + bool cycles) +{ + const struct net_device_ops *ops = dev->netdev_ops; -#ifdef CONFIG_PROC_FS -extern int __init dev_proc_init(void); + if (ops->ndo_get_tstamp) + return ops->ndo_get_tstamp(dev, hwtstamps, cycles); + + return hwtstamps->hwtstamp; +} + +#ifndef CONFIG_PREEMPT_RT +static inline void netdev_xmit_set_more(bool more) +{ + __this_cpu_write(softnet_data.xmit.more, more); +} + +static inline bool netdev_xmit_more(void) +{ + return __this_cpu_read(softnet_data.xmit.more); +} #else -#define dev_proc_init() 0 +static inline void netdev_xmit_set_more(bool more) +{ + current->net_xmit.more = more; +} + +static inline bool netdev_xmit_more(void) +{ + return current->net_xmit.more; +} #endif -extern int netdev_class_create_file(struct class_attribute *class_attr); -extern void netdev_class_remove_file(struct class_attribute *class_attr); +static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, + struct sk_buff *skb, struct net_device *dev, + bool more) +{ + netdev_xmit_set_more(more); + return ops->ndo_start_xmit(skb, dev); +} + +static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, + struct netdev_queue *txq, bool more) +{ + const struct net_device_ops *ops = dev->netdev_ops; + netdev_tx_t rc; + + rc = __netdev_start_xmit(ops, skb, dev, more); + if (rc == NETDEV_TX_OK) + txq_trans_update(dev, txq); + + return rc; +} -extern struct kobj_ns_type_operations net_ns_type_operations; +int netdev_class_create_file_ns(const struct class_attribute *class_attr, + const void *ns); +void netdev_class_remove_file_ns(const struct class_attribute *class_attr, + const void *ns); -extern const char *netdev_drivername(const struct net_device *dev); +extern const struct kobj_ns_type_operations net_ns_type_operations; -extern void linkwatch_run_queue(void); +const char *netdev_drivername(const struct net_device *dev); + +static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, + netdev_features_t f2) +{ + if ((f1 ^ f2) & NETIF_F_HW_CSUM) { + if (f1 & NETIF_F_HW_CSUM) + f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); + else + f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); + } + + return f1 & f2; +} static inline netdev_features_t netdev_get_wanted_features( struct net_device *dev) @@ -2829,23 +5329,48 @@ static inline netdev_features_t netdev_add_tso_features(netdev_features_t featur int __netdev_update_features(struct net_device *dev); void netdev_update_features(struct net_device *dev); void netdev_change_features(struct net_device *dev); +void netdev_compute_master_upper_features(struct net_device *dev, bool update_header); void netif_stacked_transfer_operstate(const struct net_device *rootdev, struct net_device *dev); +netdev_features_t passthru_features_check(struct sk_buff *skb, + struct net_device *dev, + netdev_features_t features); netdev_features_t netif_skb_features(struct sk_buff *skb); +void skb_warn_bad_offload(const struct sk_buff *skb); static inline bool net_gso_ok(netdev_features_t features, int gso_type) { - netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; + netdev_features_t feature; + + if (gso_type & (SKB_GSO_TCP_FIXEDID | SKB_GSO_TCP_FIXEDID_INNER)) + gso_type |= __SKB_GSO_TCP_FIXEDID; + + feature = ((netdev_features_t)gso_type << NETIF_F_GSO_SHIFT) & NETIF_F_GSO_MASK; /* check flags correspondence */ BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); - BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(__SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_TCP_ACCECN != + (NETIF_F_GSO_ACCECN >> NETIF_F_GSO_SHIFT)); return (features & feature) == feature; } @@ -2864,18 +5389,50 @@ static inline bool netif_needs_gso(struct sk_buff *skb, (skb->ip_summed != CHECKSUM_UNNECESSARY))); } -static inline void netif_set_gso_max_size(struct net_device *dev, - unsigned int size) +void netif_set_tso_max_size(struct net_device *dev, unsigned int size); +void netif_set_tso_max_segs(struct net_device *dev, unsigned int segs); +void netif_inherit_tso_max(struct net_device *to, + const struct net_device *from); + +static inline unsigned int +netif_get_gro_max_size(const struct net_device *dev, const struct sk_buff *skb) +{ + /* pairs with WRITE_ONCE() in netif_set_gro(_ipv4)_max_size() */ + return skb->protocol == htons(ETH_P_IPV6) ? + READ_ONCE(dev->gro_max_size) : + READ_ONCE(dev->gro_ipv4_max_size); +} + +static inline unsigned int +netif_get_gso_max_size(const struct net_device *dev, const struct sk_buff *skb) +{ + /* pairs with WRITE_ONCE() in netif_set_gso(_ipv4)_max_size() */ + return skb->protocol == htons(ETH_P_IPV6) ? + READ_ONCE(dev->gso_max_size) : + READ_ONCE(dev->gso_ipv4_max_size); +} + +static inline bool netif_is_macsec(const struct net_device *dev) +{ + return dev->priv_flags & IFF_MACSEC; +} + +static inline bool netif_is_macvlan(const struct net_device *dev) { - dev->gso_max_size = size; + return dev->priv_flags & IFF_MACVLAN; } -static inline bool netif_is_bond_master(struct net_device *dev) +static inline bool netif_is_macvlan_port(const struct net_device *dev) +{ + return dev->priv_flags & IFF_MACVLAN_PORT; +} + +static inline bool netif_is_bond_master(const struct net_device *dev) { return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; } -static inline bool netif_is_bond_slave(struct net_device *dev) +static inline bool netif_is_bond_slave(const struct net_device *dev) { return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; } @@ -2885,6 +5442,108 @@ static inline bool netif_supports_nofcs(struct net_device *dev) return dev->priv_flags & IFF_SUPP_NOFCS; } +static inline bool netif_has_l3_rx_handler(const struct net_device *dev) +{ + return dev->priv_flags & IFF_L3MDEV_RX_HANDLER; +} + +static inline bool netif_is_l3_master(const struct net_device *dev) +{ + return dev->priv_flags & IFF_L3MDEV_MASTER; +} + +static inline bool netif_is_l3_slave(const struct net_device *dev) +{ + return dev->priv_flags & IFF_L3MDEV_SLAVE; +} + +static inline int dev_sdif(const struct net_device *dev) +{ +#ifdef CONFIG_NET_L3_MASTER_DEV + if (netif_is_l3_slave(dev)) + return dev->ifindex; +#endif + return 0; +} + +static inline bool netif_is_bridge_master(const struct net_device *dev) +{ + return dev->priv_flags & IFF_EBRIDGE; +} + +static inline bool netif_is_bridge_port(const struct net_device *dev) +{ + return dev->priv_flags & IFF_BRIDGE_PORT; +} + +static inline bool netif_is_ovs_master(const struct net_device *dev) +{ + return dev->priv_flags & IFF_OPENVSWITCH; +} + +static inline bool netif_is_ovs_port(const struct net_device *dev) +{ + return dev->priv_flags & IFF_OVS_DATAPATH; +} + +static inline bool netif_is_any_bridge_master(const struct net_device *dev) +{ + return netif_is_bridge_master(dev) || netif_is_ovs_master(dev); +} + +static inline bool netif_is_any_bridge_port(const struct net_device *dev) +{ + return netif_is_bridge_port(dev) || netif_is_ovs_port(dev); +} + +static inline bool netif_is_team_master(const struct net_device *dev) +{ + return dev->priv_flags & IFF_TEAM; +} + +static inline bool netif_is_team_port(const struct net_device *dev) +{ + return dev->priv_flags & IFF_TEAM_PORT; +} + +static inline bool netif_is_lag_master(const struct net_device *dev) +{ + return netif_is_bond_master(dev) || netif_is_team_master(dev); +} + +static inline bool netif_is_lag_port(const struct net_device *dev) +{ + return netif_is_bond_slave(dev) || netif_is_team_port(dev); +} + +static inline bool netif_is_rxfh_configured(const struct net_device *dev) +{ + return dev->priv_flags & IFF_RXFH_CONFIGURED; +} + +static inline bool netif_is_failover(const struct net_device *dev) +{ + return dev->priv_flags & IFF_FAILOVER; +} + +static inline bool netif_is_failover_slave(const struct net_device *dev) +{ + return dev->priv_flags & IFF_FAILOVER_SLAVE; +} + +/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ +static inline void netif_keep_dst(struct net_device *dev) +{ + dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM); +} + +/* return true if dev can't cope with mtu frames that need vlan tag insertion */ +static inline bool netif_reduces_vlan_mtu(struct net_device *dev) +{ + /* TODO: reserve and use an additional IFF bit, if we get more users */ + return netif_is_macsec(dev); +} + extern struct pernet_operations __net_initdata loopback_net_ops; /* Logging, debugging and troubleshooting/diagnostic helpers. */ @@ -2893,126 +5552,43 @@ extern struct pernet_operations __net_initdata loopback_net_ops; static inline const char *netdev_name(const struct net_device *dev) { - if (dev->reg_state != NETREG_REGISTERED) - return "(unregistered net_device)"; + if (!dev->name[0] || strchr(dev->name, '%')) + return "(unnamed net_device)"; return dev->name; } -extern __printf(3, 4) -int netdev_printk(const char *level, const struct net_device *dev, - const char *format, ...); -extern __printf(2, 3) -int netdev_emerg(const struct net_device *dev, const char *format, ...); -extern __printf(2, 3) -int netdev_alert(const struct net_device *dev, const char *format, ...); -extern __printf(2, 3) -int netdev_crit(const struct net_device *dev, const char *format, ...); -extern __printf(2, 3) -int netdev_err(const struct net_device *dev, const char *format, ...); -extern __printf(2, 3) -int netdev_warn(const struct net_device *dev, const char *format, ...); -extern __printf(2, 3) -int netdev_notice(const struct net_device *dev, const char *format, ...); -extern __printf(2, 3) -int netdev_info(const struct net_device *dev, const char *format, ...); +static inline const char *netdev_reg_state(const struct net_device *dev) +{ + u8 reg_state = READ_ONCE(dev->reg_state); + + switch (reg_state) { + case NETREG_UNINITIALIZED: return " (uninitialized)"; + case NETREG_REGISTERED: return ""; + case NETREG_UNREGISTERING: return " (unregistering)"; + case NETREG_UNREGISTERED: return " (unregistered)"; + case NETREG_RELEASED: return " (released)"; + case NETREG_DUMMY: return " (dummy)"; + } + + WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, reg_state); + return " (unknown)"; +} #define MODULE_ALIAS_NETDEV(device) \ MODULE_ALIAS("netdev-" device) -#if defined(CONFIG_DYNAMIC_DEBUG) -#define netdev_dbg(__dev, format, args...) \ -do { \ - dynamic_netdev_dbg(__dev, format, ##args); \ -} while (0) -#elif defined(DEBUG) -#define netdev_dbg(__dev, format, args...) \ - netdev_printk(KERN_DEBUG, __dev, format, ##args) -#else -#define netdev_dbg(__dev, format, args...) \ -({ \ - if (0) \ - netdev_printk(KERN_DEBUG, __dev, format, ##args); \ - 0; \ -}) -#endif - -#if defined(VERBOSE_DEBUG) -#define netdev_vdbg netdev_dbg -#else - -#define netdev_vdbg(dev, format, args...) \ -({ \ - if (0) \ - netdev_printk(KERN_DEBUG, dev, format, ##args); \ - 0; \ -}) -#endif - /* * netdev_WARN() acts like dev_printk(), but with the key difference * of using a WARN/WARN_ON to get the message out, including the * file/line information and a backtrace. */ #define netdev_WARN(dev, format, args...) \ - WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); - -/* netif printk helpers, similar to netdev_printk */ - -#define netif_printk(priv, type, level, dev, fmt, args...) \ -do { \ - if (netif_msg_##type(priv)) \ - netdev_printk(level, (dev), fmt, ##args); \ -} while (0) - -#define netif_level(level, priv, type, dev, fmt, args...) \ -do { \ - if (netif_msg_##type(priv)) \ - netdev_##level(dev, fmt, ##args); \ -} while (0) - -#define netif_emerg(priv, type, dev, fmt, args...) \ - netif_level(emerg, priv, type, dev, fmt, ##args) -#define netif_alert(priv, type, dev, fmt, args...) \ - netif_level(alert, priv, type, dev, fmt, ##args) -#define netif_crit(priv, type, dev, fmt, args...) \ - netif_level(crit, priv, type, dev, fmt, ##args) -#define netif_err(priv, type, dev, fmt, args...) \ - netif_level(err, priv, type, dev, fmt, ##args) -#define netif_warn(priv, type, dev, fmt, args...) \ - netif_level(warn, priv, type, dev, fmt, ##args) -#define netif_notice(priv, type, dev, fmt, args...) \ - netif_level(notice, priv, type, dev, fmt, ##args) -#define netif_info(priv, type, dev, fmt, args...) \ - netif_level(info, priv, type, dev, fmt, ##args) - -#if defined(CONFIG_DYNAMIC_DEBUG) -#define netif_dbg(priv, type, netdev, format, args...) \ -do { \ - if (netif_msg_##type(priv)) \ - dynamic_netdev_dbg(netdev, format, ##args); \ -} while (0) -#elif defined(DEBUG) -#define netif_dbg(priv, type, dev, format, args...) \ - netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) -#else -#define netif_dbg(priv, type, dev, format, args...) \ -({ \ - if (0) \ - netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ - 0; \ -}) -#endif + WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \ + netdev_reg_state(dev), ##args) -#if defined(VERBOSE_DEBUG) -#define netif_vdbg netif_dbg -#else -#define netif_vdbg(priv, type, dev, format, args...) \ -({ \ - if (0) \ - netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ - 0; \ -}) -#endif +#define netdev_WARN_ONCE(dev, format, args...) \ + WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \ + netdev_reg_state(dev), ##args) /* * The list of packet types we will receive (as opposed to discard) @@ -3021,15 +5597,7 @@ do { \ * Why 16. Because with 16 the only overlap we get on a hash of the * low nibble of the protocol value is RARP/SNAP/X.25. * - * NOTE: That is no longer true with the addition of VLAN tags. Not - * sure which should go first, but I bet it won't make much - * difference if we are running VLANs. The good news is that - * this protocol won't be in the list unless compiled in, so - * the average user (w/out VLANs) will not be adversely affected. - * --BLG - * * 0800 IP - * 8100 802.1Q VLAN * 0001 802.3 * 0002 AX.25 * 0004 802.2 @@ -3044,4 +5612,14 @@ do { \ #define PTYPE_HASH_SIZE (16) #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) +extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly; + +extern struct net_device *blackhole_netdev; + +/* Note: Avoid these macros in fast path, prefer per-cpu or per-queue counters. */ +#define DEV_STATS_INC(DEV, FIELD) atomic_long_inc(&(DEV)->stats.__##FIELD) +#define DEV_STATS_ADD(DEV, FIELD, VAL) \ + atomic_long_add((VAL), &(DEV)->stats.__##FIELD) +#define DEV_STATS_READ(DEV, FIELD) atomic_long_read(&(DEV)->stats.__##FIELD) + #endif /* _LINUX_NETDEVICE_H */ |