* 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.
*/
}
/*
- * Compute the worst case header length according to the protocols
+ * Compute the worst-case header length according to the protocols
* used.
*/
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
};
/* 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.
*/
/*
- * This structure holds at boot time configured netdevice settings. They
+ * This structure holds boot-time configured netdevice settings. They
* are then used in the device probing.
*/
struct netdev_boot_setup {
/* 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;
* @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.
* 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
}
/**
- * napi_schedule_prep - check if napi can be scheduled
- * @n: napi context
+ * napi_schedule_prep - check if NAPI can be scheduled
+ * @n: NAPI context
*
* Test if NAPI routine is already running, and if not mark
- * it as running. This is used as a condition variable
+ * it as running. This is used as a condition variable to
* insure only one NAPI poll instance runs. We also make
* sure there is no pending NAPI disable.
*/
/**
* napi_schedule - schedule NAPI poll
- * @n: napi context
+ * @n: NAPI context
*
* Schedule NAPI poll routine to be called if it is not already
* running.
/**
* napi_schedule_irqoff - schedule NAPI poll
- * @n: napi context
+ * @n: NAPI context
*
* Variant of napi_schedule(), assuming hard irqs are masked.
*/
void napi_complete_done(struct napi_struct *n, int work_done);
/**
* napi_complete - NAPI processing complete
- * @n: napi context
+ * @n: NAPI context
*
* Mark NAPI processing as complete.
* Consider using napi_complete_done() instead.
/**
* napi_hash_add - add a NAPI to global hashtable
- * @napi: napi context
+ * @napi: NAPI context
*
- * generate a new napi_id and store a @napi under it in napi_hash
- * Used for busy polling (CONFIG_NET_RX_BUSY_POLL)
+ * Generate a new napi_id and store a @napi under it in napi_hash.
+ * Used for busy polling (CONFIG_NET_RX_BUSY_POLL).
* Note: This is normally automatically done from netif_napi_add(),
- * so might disappear in a future linux version.
+ * so might disappear in a future Linux version.
*/
void napi_hash_add(struct napi_struct *napi);
/**
* napi_hash_del - remove a NAPI from global table
- * @napi: napi context
+ * @napi: NAPI context
*
- * Warning: caller must observe rcu grace period
+ * Warning: caller must observe RCU grace period
* before freeing memory containing @napi, if
* this function returns true.
* Note: core networking stack automatically calls it
- * from netif_napi_del()
+ * from netif_napi_del().
* Drivers might want to call this helper to combine all
- * the needed rcu grace periods into a single one.
+ * the needed RCU grace periods into a single one.
*/
bool napi_hash_del(struct napi_struct *napi);
/**
* napi_disable - prevent NAPI from scheduling
- * @n: napi context
+ * @n: NAPI context
*
* Stop NAPI from being scheduled on this context.
* Waits till any outstanding processing completes.
/**
* napi_enable - enable NAPI scheduling
- * @n: napi context
+ * @n: NAPI context
*
* Resume NAPI from being scheduled on this context.
* Must be paired with napi_disable.
/**
* 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
struct netdev_queue {
/*
- * read mostly part
+ * read-mostly part
*/
struct net_device *dev;
struct Qdisc __rcu *qdisc;
int numa_node;
#endif
/*
- * write mostly part
+ * write-mostly part
*/
spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
int xmit_lock_owner;
/*
* The rps_sock_flow_table contains mappings of flows to the last CPU
* on which they were processed by the application (set in recvmsg).
- * Each entry is a 32bit value. Upper part is the high order bits
- * of flow hash, lower part is cpu number.
+ * Each entry is a 32bit value. Upper part is the high-order bits
+ * of flow hash, lower part is CPU number.
* rps_cpu_mask is used to partition the space, depending on number of
- * possible cpus : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
- * For example, if 64 cpus are possible, rps_cpu_mask = 0x3f,
+ * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
+ * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
* meaning we use 32-6=26 bits for the hash.
*/
struct rps_sock_flow_table {
unsigned int index = hash & table->mask;
u32 val = hash & ~rps_cpu_mask;
- /* We only give a hint, preemption can change cpu under us */
+ /* We only give a hint, preemption can change CPU under us */
val |= raw_smp_processor_id();
if (table->ents[index] != val)
* 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,
* corner cases, but the stack really does a non-trivial amount
* of useless work if you return NETDEV_TX_BUSY.
* (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
- * Required can not be NULL.
+ * Required; cannot be NULL.
*
* netdev_features_t (*ndo_fix_features)(struct net_device *dev,
* netdev_features_t features);
*
* u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
* void *accel_priv, select_queue_fallback_t fallback);
- * Called to decide which queue to when device supports multiple
+ * 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
+ * Called when a user requests an ioctl which can't be handled by
+ * the generic interface code. If not defined ioctls return
* not supported error code.
*
* 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);
* will return an error.
*
* void (*ndo_tx_timeout)(struct net_device *dev);
- * Callback uses when the transmitter has not made any progress
+ * 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,
* neither operation.
*
* int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
- * If device support VLAN filtering this function is called when a
+ * 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, __be16 proto, u16 vid);
- * If device support VLAN filtering this function is called when a
+ * If device supports VLAN filtering this function is called when a
* VLAN id is unregistered.
*
* void (*ndo_poll_controller)(struct net_device *dev);
*
* 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 adduce a theoretical security risk.
+ * 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)
*
* void (*ndo_add_vxlan_port)(struct net_device *dev,
* sa_family_t sa_family, __be16 port);
- * Called by vxlan to notiy a driver about the UDP port and socket
- * address family that vxlan is listnening to. It is called only when
+ * Called by vxlan to notify a driver about the UDP port and socket
+ * address family that vxlan is listening to. It is called only when
* a new port starts listening. The operation is protected by the
* vxlan_net->sock_lock.
*
* void (*ndo_add_geneve_port)(struct net_device *dev,
- * sa_family_t sa_family, __be16 port);
+ * sa_family_t sa_family, __be16 port);
* Called by geneve to notify a driver about the UDP port and socket
* address family that geneve is listnening to. It is called only when
* a new port starts listening. The operation is protected by the
* geneve_net->sock_lock.
*
* void (*ndo_del_geneve_port)(struct net_device *dev,
- * sa_family_t sa_family, __be16 port);
+ * sa_family_t sa_family, __be16 port);
* Called by geneve to notify the driver about a UDP port and socket
* address family that geneve is not listening to anymore. The operation
* is protected by the geneve_net->sock_lock.
* Callback to use for xmit over the accelerated station. This
* is used in place of ndo_start_xmit on accelerated net
* devices.
- * netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
- * struct net_device *dev
- * netdev_features_t features);
+ * 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
* int (*ndo_get_iflink)(const struct net_device *dev);
* Called to get the iflink value of this device.
* void (*ndo_change_proto_down)(struct net_device *dev,
- * bool proto_down);
+ * bool proto_down);
* This function is used to pass protocol port error state information
* to the switch driver. The switch driver can react to the proto_down
* by doing a phys down on the associated switch port.
* 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 reset the rx headroom to the
+ * forward. Setting a negative value resets the rx headroom to the
* default value.
*
*/
*
* 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
+ * userspace; this means that the order of these flags can change
* during any kernel release.
*
* You should have a pretty good reason to be extending these flags.
*
* @state: Generic network queuing layer state, see netdev_state_t
* @dev_list: The global list of network devices
- * @napi_list: List entry, that is used for polling napi devices
- * @unreg_list: List entry, that is used, when we are unregistering the
- * device, see the function unregister_netdev
- * @close_list: List entry, that is used, when we are closing the device
+ * @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
*
* @mpls_features: Mask of features inheritable by MPLS
*
* @ifindex: interface index
- * @group: The group, that the device belongs to
+ * @group: The group the device belongs to
*
* @stats: Statistics struct, which was left as a legacy, use
* rtnl_link_stats64 instead
* @dev_port: Used to differentiate devices that share
* the same function
* @addr_list_lock: XXX: need comments on this one
- * @uc_promisc: Counter, that indicates, that promiscuous mode
+ * @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()
* @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 from working in Promiscuous mode
+ * @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
*
* @trans_start: Time (in jiffies) of last Tx
* @watchdog_timeo: Represents the timeout that is used by
- * the watchdog ( see dev_watchdog() )
+ * the watchdog (see dev_watchdog())
* @watchdog_timer: List of timers
*
* @pcpu_refcnt: Number of references to this device
atomic_long_t rx_nohandler;
#ifdef CONFIG_WIRELESS_EXT
- const struct iw_handler_def * wireless_handlers;
- struct iw_public_data * wireless_data;
+ const struct iw_handler_def *wireless_handlers;
+ struct iw_public_data *wireless_data;
#endif
const struct net_device_ops *netdev_ops;
const struct ethtool_ops *ethtool_ops;
unsigned int allmulti;
- /* Protocol specific pointers */
+ /* Protocol-specific pointers */
#if IS_ENABLED(CONFIG_VLAN_8021Q)
struct vlan_info __rcu *vlan_info;
/* Interface address info used in eth_type_trans() */
unsigned char *dev_addr;
-
#ifdef CONFIG_SYSFS
struct netdev_rx_queue *_rx;
unsigned int num_rx_queues;
unsigned int real_num_rx_queues;
-
#endif
unsigned long gro_flush_timeout;
struct garp_port __rcu *garp_port;
struct mrp_port __rcu *mrp_port;
- struct device dev;
+ struct device dev;
const struct attribute_group *sysfs_groups[4];
const struct attribute_group *sysfs_rx_queue_group;
#ifdef CONFIG_DCB
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 num_tc;
+ struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
+ u8 prio_tc_map[TC_BITMASK + 1];
#if IS_ENABLED(CONFIG_FCOE)
unsigned int fcoe_ddp_xid;
#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
struct netprio_map __rcu *priomap;
#endif
- struct phy_device *phydev;
- struct lock_class_key *qdisc_tx_busylock;
- bool proto_down;
+ struct phy_device *phydev;
+ struct lock_class_key *qdisc_tx_busylock;
+ bool proto_down;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)
/* Set the sysfs device type for the network logical device to allow
* fine-grained identification of different network device types. For
- * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
+ * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
*/
#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
#define NAPI_POLL_WEIGHT 64
/**
- * netif_napi_add - initialize a napi context
+ * netif_napi_add - initialize a NAPI context
* @dev: network device
- * @napi: napi context
+ * @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.
+ * 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);
/**
- * netif_tx_napi_add - initialize a napi context
+ * netif_tx_napi_add - initialize a NAPI context
* @dev: network device
- * @napi: napi context
+ * @napi: NAPI context
* @poll: polling function
* @weight: default weight
*
}
/**
- * netif_napi_del - remove a napi context
- * @napi: napi context
+ * netif_napi_del - remove a NAPI context
+ * @napi: NAPI context
*
- * netif_napi_del() removes a napi context from the network device napi list
+ * netif_napi_del() removes a NAPI context from the network device NAPI list
*/
void netif_napi_del(struct napi_struct *napi);
struct napi_gro_cb {
/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
- void *frag0;
+ void *frag0;
/* Length of frag0. */
unsigned int frag0_len;
/* This indicates where we are processing relative to skb->data. */
- int data_offset;
+ int data_offset;
/* This is non-zero if the packet cannot be merged with the new skb. */
u16 flush;
struct udp_offload_callbacks callbacks;
};
-/* often modified stats are per cpu, other are shared (netdev->stats) */
+/* often modified stats are per-CPU, other are shared (netdev->stats) */
struct pcpu_sw_netstats {
u64 rx_packets;
u64 rx_bytes;
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 nofication for link or unlink */
+ bool linking; /* is the notification for link or unlink */
void *upper_info; /* upper dev info */
};
#endif /* CONFIG_NET_FLOW_LIMIT */
/*
- * Incoming packets are placed on per-cpu queues
+ * Incoming packets are placed on per-CPU queues
*/
struct softnet_data {
struct list_head poll_list;
* @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.
+ * to give appropriate hint to the CPU.
*/
static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
{
* @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.
+ * to give appropriate hint to the CPU.
*/
static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
{
}
/*
- * 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.
* 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)
{
*
* 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 *),
* @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 *))
*
* 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 *),
* @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 *))
projects / cascardo / linux.git / commitdiff