1 /*
2 * Copyright (C) 2017 Netronome Systems, Inc.
3 *
4 * This software is licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree.
7 *
8 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
9 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
10 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
12 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
13 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
14 */
15
16 #include <linux/debugfs.h>
17 #include <linux/device.h>
18 #include <linux/kernel.h>
19 #include <linux/list.h>
20 #include <linux/netdevice.h>
21 #include <linux/u64_stats_sync.h>
22 #include <net/devlink.h>
23 #include <net/udp_tunnel.h>
24 #include <net/xdp.h>
25
26 #define DRV_NAME "netdevsim"
27
28 #define NSIM_XDP_MAX_MTU 4000
29
30 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
31
32 #define NSIM_IPSEC_MAX_SA_COUNT 33
33 #define NSIM_IPSEC_VALID BIT(31)
34 #define NSIM_UDP_TUNNEL_N_PORTS 4
35
36 struct nsim_sa {
37 struct xfrm_state *xs;
38 __be32 ipaddr[4];
39 u32 key[4];
40 u32 salt;
41 bool used;
42 bool crypt;
43 bool rx;
44 };
45
46 struct nsim_ipsec {
47 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
48 struct dentry *pfile;
49 u32 count;
50 u32 tx;
51 u32 ok;
52 };
53
54 struct nsim_ethtool {
55 bool rx;
56 bool tx;
57 bool report_stats_rx;
58 bool report_stats_tx;
59 };
60
61 struct netdevsim {
62 struct net_device *netdev;
63 struct nsim_dev *nsim_dev;
64 struct nsim_dev_port *nsim_dev_port;
65
66 u64 tx_packets;
67 u64 tx_bytes;
68 struct u64_stats_sync syncp;
69
70 struct nsim_bus_dev *nsim_bus_dev;
71
72 struct bpf_prog *bpf_offloaded;
73 u32 bpf_offloaded_id;
74
75 struct xdp_attachment_info xdp;
76 struct xdp_attachment_info xdp_hw;
77
78 bool bpf_tc_accept;
79 bool bpf_tc_non_bound_accept;
80 bool bpf_xdpdrv_accept;
81 bool bpf_xdpoffload_accept;
82
83 bool bpf_map_accept;
84 struct nsim_ipsec ipsec;
85 struct {
86 u32 inject_error;
87 u32 sleep;
88 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
89 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
90 struct debugfs_u32_array dfs_ports[2];
91 } udp_ports;
92
93 struct nsim_ethtool ethtool;
94 };
95
96 struct netdevsim *
97 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
98 void nsim_destroy(struct netdevsim *ns);
99
100 void nsim_ethtool_init(struct netdevsim *ns);
101
102 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
103 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
104 struct net_device *dev);
105 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
106
107 #ifdef CONFIG_BPF_SYSCALL
108 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
109 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
110 int nsim_bpf_init(struct netdevsim *ns);
111 void nsim_bpf_uninit(struct netdevsim *ns);
112 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
113 int nsim_bpf_disable_tc(struct netdevsim *ns);
114 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
115 void *type_data, void *cb_priv);
116 #else
117
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)118 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
119 {
120 return 0;
121 }
122
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)123 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
124 {
125 }
nsim_bpf_init(struct netdevsim * ns)126 static inline int nsim_bpf_init(struct netdevsim *ns)
127 {
128 return 0;
129 }
130
nsim_bpf_uninit(struct netdevsim * ns)131 static inline void nsim_bpf_uninit(struct netdevsim *ns)
132 {
133 }
134
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)135 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
136 {
137 return -EOPNOTSUPP;
138 }
139
nsim_bpf_disable_tc(struct netdevsim * ns)140 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
141 {
142 return 0;
143 }
144
145 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)146 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
147 void *cb_priv)
148 {
149 return -EOPNOTSUPP;
150 }
151 #endif
152
153 enum nsim_resource_id {
154 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
155 NSIM_RESOURCE_IPV4,
156 NSIM_RESOURCE_IPV4_FIB,
157 NSIM_RESOURCE_IPV4_FIB_RULES,
158 NSIM_RESOURCE_IPV6,
159 NSIM_RESOURCE_IPV6_FIB,
160 NSIM_RESOURCE_IPV6_FIB_RULES,
161 };
162
163 struct nsim_dev_health {
164 struct devlink_health_reporter *empty_reporter;
165 struct devlink_health_reporter *dummy_reporter;
166 struct dentry *ddir;
167 char *recovered_break_msg;
168 u32 binary_len;
169 bool fail_recover;
170 };
171
172 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
173 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
174
175 struct nsim_dev_port {
176 struct list_head list;
177 struct devlink_port devlink_port;
178 unsigned int port_index;
179 struct dentry *ddir;
180 struct netdevsim *ns;
181 };
182
183 struct nsim_dev {
184 struct nsim_bus_dev *nsim_bus_dev;
185 struct nsim_fib_data *fib_data;
186 struct nsim_trap_data *trap_data;
187 struct dentry *ddir;
188 struct dentry *ports_ddir;
189 struct dentry *take_snapshot;
190 struct bpf_offload_dev *bpf_dev;
191 bool bpf_bind_accept;
192 bool bpf_bind_verifier_accept;
193 u32 bpf_bind_verifier_delay;
194 struct dentry *ddir_bpf_bound_progs;
195 u32 prog_id_gen;
196 struct list_head bpf_bound_progs;
197 struct list_head bpf_bound_maps;
198 struct netdev_phys_item_id switch_id;
199 struct list_head port_list;
200 struct mutex port_list_lock; /* protects port list */
201 bool fw_update_status;
202 u32 fw_update_overwrite_mask;
203 u32 max_macs;
204 bool test1;
205 bool dont_allow_reload;
206 bool fail_reload;
207 struct devlink_region *dummy_region;
208 struct nsim_dev_health health;
209 struct flow_action_cookie *fa_cookie;
210 spinlock_t fa_cookie_lock; /* protects fa_cookie */
211 bool fail_trap_group_set;
212 bool fail_trap_policer_set;
213 bool fail_trap_policer_counter_get;
214 struct {
215 struct udp_tunnel_nic_shared utn_shared;
216 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
217 bool sync_all;
218 bool open_only;
219 bool ipv4_only;
220 bool shared;
221 bool static_iana_vxlan;
222 u32 sleep;
223 } udp_ports;
224 };
225
nsim_dev_net(struct nsim_dev * nsim_dev)226 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
227 {
228 return devlink_net(priv_to_devlink(nsim_dev));
229 }
230
231 int nsim_dev_init(void);
232 void nsim_dev_exit(void);
233 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
234 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
235 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
236 unsigned int port_index);
237 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
238 unsigned int port_index);
239
240 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
241 struct netlink_ext_ack *extack);
242 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
243 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
244 enum nsim_resource_id res_id, bool max);
245
246 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
247 void nsim_ipsec_init(struct netdevsim *ns);
248 void nsim_ipsec_teardown(struct netdevsim *ns);
249 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
250 #else
nsim_ipsec_init(struct netdevsim * ns)251 static inline void nsim_ipsec_init(struct netdevsim *ns)
252 {
253 }
254
nsim_ipsec_teardown(struct netdevsim * ns)255 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
256 {
257 }
258
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)259 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
260 {
261 return true;
262 }
263 #endif
264
265 struct nsim_vf_config {
266 int link_state;
267 u16 min_tx_rate;
268 u16 max_tx_rate;
269 u16 vlan;
270 __be16 vlan_proto;
271 u16 qos;
272 u8 vf_mac[ETH_ALEN];
273 bool spoofchk_enabled;
274 bool trusted;
275 bool rss_query_enabled;
276 };
277
278 struct nsim_bus_dev {
279 struct device dev;
280 struct list_head list;
281 unsigned int port_count;
282 struct net *initial_net; /* Purpose of this is to carry net pointer
283 * during the probe time only.
284 */
285 unsigned int num_vfs;
286 struct nsim_vf_config *vfconfigs;
287 /* Lock for devlink->reload_enabled in netdevsim module */
288 struct mutex nsim_bus_reload_lock;
289 bool init;
290 };
291
292 int nsim_bus_init(void);
293 void nsim_bus_exit(void);
294