diff options
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 305 |
1 files changed, 277 insertions, 28 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 71caf7a..5eeb2cd 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -138,6 +138,9 @@ static inline bool dev_xmit_complete(int rc) #define MAX_ADDR_LEN 32 /* Largest hardware address length */ +/* Initial net device group. All devices belong to group 0 by default. */ +#define INIT_NETDEV_GROUP 0 + #ifdef __KERNEL__ /* * Compute the worst case header length according to the protocols @@ -387,7 +390,55 @@ enum gro_result { }; typedef enum gro_result gro_result_t; -typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb); +/* + * enum rx_handler_result - Possible return values for rx_handlers. + * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it + * further. + * @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_handlers are functions called from inside __netif_receive_skb(), to do + * special processing of the skb, prior to delivery to protocol handlers. + * + * Currently, a net_device can only have a single rx_handler registered. Trying + * to register a second rx_handler will return -EBUSY. + * + * To register a rx_handler on a net_device, use netdev_rx_handler_register(). + * To unregister a rx_handler on a net_device, use + * netdev_rx_handler_unregister(). + * + * 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 + * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for + * the skb to be delivered in some other ways. + * + * 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 + * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that + * are registred on exact device (ptype->dev == skb->dev). + * + * If the rx_handler didn't changed skb->dev, but want 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 + * returned RX_HANDLER_PASS. + */ + +enum rx_handler_result { + RX_HANDLER_CONSUMED, + RX_HANDLER_ANOTHER, + RX_HANDLER_EXACT, + RX_HANDLER_PASS, +}; +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); @@ -551,14 +602,16 @@ struct rps_map { #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 and the - * tail pointer for that CPU's input queue at the time of last enqueue. + * 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 fill; + u16 filter; unsigned int last_qtail; }; +#define RPS_NO_FILTER 0xffff /* * The rps_dev_flow_table structure contains a table of flow mappings. @@ -608,6 +661,11 @@ static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, 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); +#endif + /* This structure contains an instance of an RX queue. */ struct netdev_rx_queue { struct rps_map __rcu *rps_map; @@ -643,6 +701,14 @@ struct xps_dev_maps { (nr_cpu_ids * sizeof(struct xps_map *))) #endif /* CONFIG_XPS */ +#define TC_MAX_QUEUE 16 +#define TC_BITMASK 15 +/* HW offloaded queuing disciplines txq count and offset maps */ +struct netdev_tc_txq { + u16 count; + u16 offset; +}; + /* * This structure defines the management hooks for network devices. * The following hooks can be defined; unless noted otherwise, they are @@ -753,6 +819,74 @@ struct xps_dev_maps { * 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) + * 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. + * + * Fiber Channel over Ethernet (FCoE) offload functions. + * int (*ndo_fcoe_enable)(struct net_device *dev); + * Called when the FCoE protocol stack wants to start using LLD for FCoE + * so the underlying device can perform whatever needed configuration or + * initialization to support acceleration of FCoE traffic. + * + * int (*ndo_fcoe_disable)(struct net_device *dev); + * Called when the FCoE protocol stack wants to stop using LLD for FCoE + * so the underlying device can perform whatever needed clean-ups to + * stop supporting acceleration of FCoE traffic. + * + * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, + * struct scatterlist *sgl, unsigned int sgc); + * Called when the FCoE Initiator wants to initialize an I/O that + * is a possible candidate for Direct Data Placement (DDP). The LLD can + * perform necessary setup and returns 1 to indicate the device is set up + * successfully to perform DDP on this I/O, otherwise this returns 0. + * + * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); + * Called when the FCoE Initiator/Target is done with the DDPed I/O as + * indicated by the FC exchange id 'xid', so the underlying device can + * clean up and reuse resources for later DDP requests. + * + * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, + * struct scatterlist *sgl, unsigned int sgc); + * Called when the FCoE Target wants to initialize an I/O that + * is a possible candidate for Direct Data Placement (DDP). The LLD can + * perform necessary setup and returns 1 to indicate the device is set up + * successfully to perform DDP on this I/O, otherwise this returns 0. + * + * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); + * Called when the underlying device wants to override default World Wide + * Name (WWN) generation mechanism in FCoE protocol stack to pass its own + * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE + * protocol stack to use. + * + * RFS acceleration. + * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, + * u16 rxq_index, u32 flow_id); + * Set hardware filter for RFS. rxq_index is the target queue index; + * flow_id is a flow ID to be passed to rps_may_expire_flow() later. + * Return the filter ID on success, or a negative error code. + * + * Slave management functions (for bridge, bonding, etc). User should + * call netdev_set_master() to set dev->master properly. + * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); + * Called to make another netdev an underling. + * + * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); + * Called to release previously enslaved netdev. + * + * Feature/offload setting functions. + * u32 (*ndo_fix_features)(struct net_device *dev, u32 features); + * Adjusts the requested feature flags according to device-specific + * constraints, and returns the resulting flags. Must not modify + * the device state. + * + * int (*ndo_set_features)(struct net_device *dev, u32 features); + * Called to update device configuration to new features. Passed + * feature set might be less than what was returned by ndo_fix_features()). + * Must return >0 or -errno if it changed dev->features itself. + * */ #define HAVE_NET_DEVICE_OPS struct net_device_ops { @@ -811,6 +945,7 @@ struct net_device_ops { 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); #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) int (*ndo_fcoe_enable)(struct net_device *dev); int (*ndo_fcoe_disable)(struct net_device *dev); @@ -820,11 +955,29 @@ struct net_device_ops { unsigned int sgc); int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); + int (*ndo_fcoe_ddp_target)(struct net_device *dev, + u16 xid, + struct scatterlist *sgl, + unsigned int sgc); #define NETDEV_FCOE_WWNN 0 #define NETDEV_FCOE_WWPN 1 int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); #endif +#ifdef CONFIG_RFS_ACCEL + int (*ndo_rx_flow_steer)(struct net_device *dev, + const struct sk_buff *skb, + u16 rxq_index, + u32 flow_id); +#endif + int (*ndo_add_slave)(struct net_device *dev, + struct net_device *slave_dev); + int (*ndo_del_slave)(struct net_device *dev, + struct net_device *slave_dev); + u32 (*ndo_fix_features)(struct net_device *dev, + u32 features); + int (*ndo_set_features)(struct net_device *dev, + u32 features); }; /* @@ -876,8 +1029,18 @@ struct net_device { struct list_head napi_list; struct list_head unreg_list; - /* Net device features */ - unsigned long features; + /* currently active device features */ + u32 features; + /* user-changeable features */ + u32 hw_features; + /* user-requested features */ + u32 wanted_features; + /* VLAN feature mask */ + u32 vlan_features; + + /* Net device feature bits; if you change something, + * also update netdev_features_strings[] in ethtool.c */ + #define NETIF_F_SG 1 /* Scatter/gather IO. */ #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ @@ -902,6 +1065,7 @@ struct net_device { #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ +#define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */ /* Segmentation offload features */ #define NETIF_F_GSO_SHIFT 16 @@ -913,6 +1077,12 @@ struct net_device { #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) + /* Features valid for ethtool to change */ + /* = all defined minus driver/device-class-related */ +#define NETIF_F_NEVER_CHANGE (NETIF_F_HIGHDMA | NETIF_F_VLAN_CHALLENGED | \ + NETIF_F_LLTX | NETIF_F_NETNS_LOCAL) +#define NETIF_F_ETHTOOL_BITS (0x3f3fffff & ~NETIF_F_NEVER_CHANGE) + /* List of features with software fallbacks. */ #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \ NETIF_F_TSO6 | NETIF_F_UFO) @@ -923,6 +1093,12 @@ struct net_device { #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) +#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN) + +#define NETIF_F_ALL_TX_OFFLOADS (NETIF_F_ALL_CSUM | NETIF_F_SG | \ + NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ + NETIF_F_SCTP_CSUM | NETIF_F_FCOE_CRC) + /* * If one device supports one of these features, then enable them * for all in netdev_increment_features. @@ -931,6 +1107,9 @@ struct net_device { NETIF_F_SG | NETIF_F_HIGHDMA | \ NETIF_F_FRAGLIST) + /* changeable features with no special hardware requirements */ +#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO) + /* Interface index. Unique device identifier */ int ifindex; int iflink; @@ -1039,6 +1218,13 @@ struct net_device { /* Number of RX queues currently active in device */ unsigned int real_num_rx_queues; + +#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 #endif rx_handler_func_t __rcu *rx_handler; @@ -1132,9 +1318,6 @@ struct net_device { /* rtnetlink link ops */ const struct rtnl_link_ops *rtnl_link_ops; - /* VLAN feature mask */ - unsigned long vlan_features; - /* for setting kernel sock attribute on TCP connection setup */ #define GSO_MAX_SIZE 65536 unsigned int gso_max_size; @@ -1143,6 +1326,9 @@ struct net_device { /* 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]; #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) /* max exchange id for FCoE LRO by ddp */ @@ -1153,12 +1339,66 @@ struct net_device { /* phy device may attach itself for hardware timestamping */ struct phy_device *phydev; + + /* group the device belongs to */ + int group; }; #define to_net_dev(d) container_of(d, struct net_device, dev) #define NETDEV_ALIGN 32 static inline +int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) +{ + return dev->prio_tc_map[prio & TC_BITMASK]; +} + +static inline +int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) +{ + if (tc >= dev->num_tc) + return -EINVAL; + + dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; + return 0; +} + +static inline +void netdev_reset_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)); +} + +static inline +int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) +{ + if (tc >= dev->num_tc) + return -EINVAL; + + dev->tc_to_txq[tc].count = count; + dev->tc_to_txq[tc].offset = offset; + return 0; +} + +static inline +int netdev_set_num_tc(struct net_device *dev, u8 num_tc) +{ + if (num_tc > TC_MAX_QUEUE) + return -EINVAL; + + dev->num_tc = num_tc; + return 0; +} + +static inline +int netdev_get_num_tc(struct net_device *dev) +{ + return dev->num_tc; +} + +static inline struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, unsigned int index) { @@ -1300,7 +1540,7 @@ struct packet_type { struct packet_type *, struct net_device *); struct sk_buff *(*gso_segment)(struct sk_buff *skb, - int features); + u32 features); int (*gso_send_check)(struct sk_buff *skb); struct sk_buff **(*gro_receive)(struct sk_buff **head, struct sk_buff *skb); @@ -1345,7 +1585,7 @@ static inline struct net_device *next_net_device_rcu(struct net_device *dev) struct net *net; net = dev_net(dev); - lh = rcu_dereference(dev->dev_list.next); + lh = rcu_dereference(list_next_rcu(&dev->dev_list)); return lh == &net->dev_base_head ? NULL : net_device_entry(lh); } @@ -1355,6 +1595,13 @@ 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, @@ -1606,8 +1853,7 @@ static inline void netif_tx_wake_all_queues(struct net_device *dev) static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) { if (WARN_ON(!dev_queue)) { - printk(KERN_INFO "netif_stop_queue() cannot be called before " - "register_netdev()"); + pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); return; } set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); @@ -1844,6 +2090,7 @@ 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_hard_start_xmit(struct sk_buff *skb, @@ -2267,8 +2514,10 @@ extern int netdev_max_backlog; extern int netdev_tstamp_prequeue; extern int weight_p; extern int netdev_set_master(struct net_device *dev, struct net_device *master); +extern int netdev_set_bond_master(struct net_device *dev, + struct net_device *master); extern int skb_checksum_help(struct sk_buff *skb); -extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); +extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features); #ifdef CONFIG_BUG extern void netdev_rx_csum_fault(struct net_device *dev); #else @@ -2295,22 +2544,26 @@ extern char *netdev_drivername(const struct net_device *dev, char *buffer, int l extern void linkwatch_run_queue(void); -unsigned long netdev_increment_features(unsigned long all, unsigned long one, - unsigned long mask); -unsigned long netdev_fix_features(unsigned long features, const char *name); +static inline u32 netdev_get_wanted_features(struct net_device *dev) +{ + return (dev->features & ~dev->hw_features) | dev->wanted_features; +} +u32 netdev_increment_features(u32 all, u32 one, u32 mask); +u32 netdev_fix_features(struct net_device *dev, u32 features); +void netdev_update_features(struct net_device *dev); void netif_stacked_transfer_operstate(const struct net_device *rootdev, struct net_device *dev); -int netif_skb_features(struct sk_buff *skb); +u32 netif_skb_features(struct sk_buff *skb); -static inline int net_gso_ok(int features, int gso_type) +static inline int net_gso_ok(u32 features, int gso_type) { int feature = gso_type << NETIF_F_GSO_SHIFT; return (features & feature) == feature; } -static inline int skb_gso_ok(struct sk_buff *skb, int features) +static inline int skb_gso_ok(struct sk_buff *skb, u32 features) { return net_gso_ok(features, skb_shinfo(skb)->gso_type) && (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); @@ -2328,15 +2581,9 @@ static inline void netif_set_gso_max_size(struct net_device *dev, dev->gso_max_size = size; } -extern int __skb_bond_should_drop(struct sk_buff *skb, - struct net_device *master); - -static inline int skb_bond_should_drop(struct sk_buff *skb, - struct net_device *master) +static inline int netif_is_bond_slave(struct net_device *dev) { - if (master) - return __skb_bond_should_drop(skb, master); - return 0; + return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; } extern struct pernet_operations __net_initdata loopback_net_ops; @@ -2351,6 +2598,8 @@ static inline int dev_ethtool_get_settings(struct net_device *dev, static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) { + if (dev->hw_features & NETIF_F_RXCSUM) + return !!(dev->features & NETIF_F_RXCSUM); if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) return 0; return dev->ethtool_ops->get_rx_csum(dev); |