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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/devlink.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)
#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;
struct nsim_dev *nsim_dev;
struct nsim_dev_port *nsim_dev_port;
u64 tx_packets;
u64 tx_bytes;
struct u64_stats_sync syncp;
struct nsim_bus_dev *nsim_bus_dev;
struct bpf_prog *bpf_offloaded;
u32 bpf_offloaded_id;
struct xdp_attachment_info xdp;
struct xdp_attachment_info xdp_hw;
bool bpf_tc_accept;
bool bpf_tc_non_bound_accept;
bool bpf_xdpdrv_accept;
bool bpf_xdpoffload_accept;
bool bpf_map_accept;
struct nsim_ipsec ipsec;
};
struct netdevsim *
nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
void nsim_destroy(struct netdevsim *ns);
#ifdef CONFIG_BPF_SYSCALL
int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
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_dev_init(struct nsim_dev *nsim_dev)
{
return 0;
}
static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
{
}
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
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,
};
struct nsim_dev_health {
struct devlink_health_reporter *empty_reporter;
struct devlink_health_reporter *dummy_reporter;
struct dentry *ddir;
char *recovered_break_msg;
u32 binary_len;
bool fail_recover;
};
int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
struct nsim_dev_port {
struct list_head list;
struct devlink_port devlink_port;
unsigned int port_index;
struct dentry *ddir;
struct netdevsim *ns;
};
struct nsim_dev {
struct nsim_bus_dev *nsim_bus_dev;
struct nsim_fib_data *fib_data;
struct nsim_trap_data *trap_data;
struct dentry *ddir;
struct dentry *ports_ddir;
struct dentry *take_snapshot;
struct bpf_offload_dev *bpf_dev;
bool bpf_bind_accept;
u32 bpf_bind_verifier_delay;
struct dentry *ddir_bpf_bound_progs;
u32 prog_id_gen;
struct list_head bpf_bound_progs;
struct list_head bpf_bound_maps;
struct netdev_phys_item_id switch_id;
struct list_head port_list;
struct mutex port_list_lock; /* protects port list */
bool fw_update_status;
u32 max_macs;
bool test1;
bool dont_allow_reload;
bool fail_reload;
struct devlink_region *dummy_region;
struct nsim_dev_health health;
struct flow_action_cookie *fa_cookie;
spinlock_t fa_cookie_lock; /* protects fa_cookie */
bool fail_trap_group_set;
bool fail_trap_policer_set;
bool fail_trap_policer_counter_get;
};
static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
{
return devlink_net(priv_to_devlink(nsim_dev));
}
int nsim_dev_init(void);
void nsim_dev_exit(void);
int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
unsigned int port_index);
int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
unsigned int port_index);
struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
struct netlink_ext_ack *extack);
void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
enum nsim_resource_id res_id, bool max);
#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
struct nsim_vf_config {
int link_state;
u16 min_tx_rate;
u16 max_tx_rate;
u16 vlan;
__be16 vlan_proto;
u16 qos;
u8 vf_mac[ETH_ALEN];
bool spoofchk_enabled;
bool trusted;
bool rss_query_enabled;
};
struct nsim_bus_dev {
struct device dev;
struct list_head list;
unsigned int port_count;
struct net *initial_net; /* Purpose of this is to carry net pointer
* during the probe time only.
*/
unsigned int num_vfs;
struct nsim_vf_config *vfconfigs;
/* Lock for devlink->reload_enabled in netdevsim module */
struct mutex nsim_bus_reload_lock;
bool init;
};
int nsim_bus_init(void);
void nsim_bus_exit(void);
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