summaryrefslogtreecommitdiff
path: root/drivers/net/netdevsim/netdevsim.h
blob: 4ded54a21e1e854ad4a8ddb4e3c01b503c33a7d0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/*
 * 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);