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/*
* 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_SYSCALL
int 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);
#else
static 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 int
nsim_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);
#else
static 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);
#else
static 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);
}
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