/* * Copyright (C) 2017 Netronome Systems, Inc. * * This software is licensed under the GNU General License Version 2, * June 1991 as shown in the file COPYING in the top-level directory of this * source tree. * * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. */ #include <linux/device.h>#include <linux/kernel.h>#include <linux/list.h>#include <linux/netdevice.h>#include <linux/u64_stats_sync.h>#include <net/xdp.h> #define DRV_NAME	"netdevsim" #define NSIM_XDP_MAX_MTU	4000 #define NSIM_EA(extack, msg)	NL_SET_ERR_MSG_MOD((extack), msg) struct bpf_prog;struct bpf_offload_dev;struct dentry;struct nsim_vf_config; struct netdevsim_shared_dev {	unsigned int refcnt;	u32 switch_id; 	struct dentry *ddir; 	struct bpf_offload_dev *bpf_dev; 	struct dentry *ddir_bpf_bound_progs;	u32 prog_id_gen; 	struct list_head bpf_bound_progs;	struct list_head bpf_bound_maps;}; #define NSIM_IPSEC_MAX_SA_COUNT		33#define NSIM_IPSEC_VALID		BIT(31) struct nsim_sa {	struct xfrm_state *xs;	__be32 ipaddr[4];	u32 key[4];	u32 salt;	bool used;	bool crypt;	bool rx;}; struct nsim_ipsec {	struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];	struct dentry *pfile;	u32 count;	u32 tx;	u32 ok;}; struct netdevsim {	struct net_device *netdev; 	u64 tx_packets;	u64 tx_bytes;	struct u64_stats_sync syncp; 	struct device dev;	struct netdevsim_shared_dev *sdev; 	struct dentry *ddir; 	unsigned int num_vfs;	struct nsim_vf_config *vfconfigs; 	struct bpf_prog	*bpf_offloaded;	u32 bpf_offloaded_id; 	struct xdp_attachment_info xdp;	struct xdp_attachment_info xdp_hw; 	bool bpf_bind_accept;	u32 bpf_bind_verifier_delay; 	bool bpf_tc_accept;	bool bpf_tc_non_bound_accept;	bool bpf_xdpdrv_accept;	bool bpf_xdpoffload_accept; 	bool bpf_map_accept;#if IS_ENABLED(CONFIG_NET_DEVLINK)	struct devlink *devlink;#endif	struct nsim_ipsec ipsec;}; #ifdef CONFIG_BPF_SYSCALLint nsim_bpf_init(struct netdevsim *ns);void nsim_bpf_uninit(struct netdevsim *ns);int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);int nsim_bpf_disable_tc(struct netdevsim *ns);int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,			       void *type_data, void *cb_priv);#elsestatic inline int nsim_bpf_init(struct netdevsim *ns){	return 0;} static inline void nsim_bpf_uninit(struct netdevsim *ns){} static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf){	return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP;} static inline int nsim_bpf_disable_tc(struct netdevsim *ns){	return 0;} static inline intnsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,			   void *cb_priv){	return -EOPNOTSUPP;}#endif #if IS_ENABLED(CONFIG_NET_DEVLINK)enum nsim_resource_id {	NSIM_RESOURCE_NONE,   /* DEVLINK_RESOURCE_ID_PARENT_TOP */	NSIM_RESOURCE_IPV4,	NSIM_RESOURCE_IPV4_FIB,	NSIM_RESOURCE_IPV4_FIB_RULES,	NSIM_RESOURCE_IPV6,	NSIM_RESOURCE_IPV6_FIB,	NSIM_RESOURCE_IPV6_FIB_RULES,}; int nsim_devlink_setup(struct netdevsim *ns);void nsim_devlink_teardown(struct netdevsim *ns); int nsim_devlink_init(void);void nsim_devlink_exit(void); int nsim_fib_init(void);void nsim_fib_exit(void);u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max);int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val,		     struct netlink_ext_ack *extack);#elsestatic inline int nsim_devlink_setup(struct netdevsim *ns){	return 0;} static inline void nsim_devlink_teardown(struct netdevsim *ns){} static inline int nsim_devlink_init(void){	return 0;} static inline void nsim_devlink_exit(void){}#endif #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)void nsim_ipsec_init(struct netdevsim *ns);void nsim_ipsec_teardown(struct netdevsim *ns);bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);#elsestatic inline void nsim_ipsec_init(struct netdevsim *ns){} static inline void nsim_ipsec_teardown(struct netdevsim *ns){} static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb){	return true;}#endif static inline struct netdevsim *to_nsim(struct device *ptr){	return container_of(ptr, struct netdevsim, dev);}