1 files changed, 280 insertions, 28 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d971346b0340..5eeb2cd3631c 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);
@@ -2392,6 +2641,9 @@ extern int netdev_notice(const struct net_device *dev, const char *format, ...)
 extern int netdev_info(const struct net_device *dev, const char *format, ...)
         __attribute__ ((format (printf, 2, 3)));
 
+#define MODULE_ALIAS_NETDEV(device) \
+        MODULE_ALIAS("netdev-" device)
+
 #if defined(DEBUG)
 #define netdev_dbg(__dev, format, args...)                      \
         netdev_printk(KERN_DEBUG, __dev, format, ##args)