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/ethtool.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <linux/u64_stats_sync.h>
23 #include <net/devlink.h>
24 #include <net/udp_tunnel.h>
25 #include <net/xdp.h>
26
27 #define DRV_NAME "netdevsim"
28
29 #define NSIM_XDP_MAX_MTU 4000
30
31 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
32
33 #define NSIM_IPSEC_MAX_SA_COUNT 33
34 #define NSIM_IPSEC_VALID BIT(31)
35 #define NSIM_UDP_TUNNEL_N_PORTS 4
36
37 struct nsim_sa {
38 struct xfrm_state *xs;
39 __be32 ipaddr[4];
40 u32 key[4];
41 u32 salt;
42 bool used;
43 bool crypt;
44 bool rx;
45 };
46
47 struct nsim_ipsec {
48 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
49 struct dentry *pfile;
50 u32 count;
51 u32 tx;
52 u32 ok;
53 };
54
55 struct nsim_ethtool_pauseparam {
56 bool rx;
57 bool tx;
58 bool report_stats_rx;
59 bool report_stats_tx;
60 };
61
62 struct nsim_ethtool {
63 u32 get_err;
64 u32 set_err;
65 struct nsim_ethtool_pauseparam pauseparam;
66 struct ethtool_coalesce coalesce;
67 struct ethtool_ringparam ring;
68 struct ethtool_fecparam fec;
69 };
70
71 struct netdevsim {
72 struct net_device *netdev;
73 struct nsim_dev *nsim_dev;
74 struct nsim_dev_port *nsim_dev_port;
75
76 u64 tx_packets;
77 u64 tx_bytes;
78 struct u64_stats_sync syncp;
79
80 struct nsim_bus_dev *nsim_bus_dev;
81
82 struct bpf_prog *bpf_offloaded;
83 u32 bpf_offloaded_id;
84
85 struct xdp_attachment_info xdp;
86 struct xdp_attachment_info xdp_hw;
87
88 bool bpf_tc_accept;
89 bool bpf_tc_non_bound_accept;
90 bool bpf_xdpdrv_accept;
91 bool bpf_xdpoffload_accept;
92
93 bool bpf_map_accept;
94 struct nsim_ipsec ipsec;
95 struct {
96 u32 inject_error;
97 u32 sleep;
98 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
99 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
100 struct debugfs_u32_array dfs_ports[2];
101 } udp_ports;
102
103 struct nsim_ethtool ethtool;
104 };
105
106 struct netdevsim *
107 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
108 void nsim_destroy(struct netdevsim *ns);
109
110 void nsim_ethtool_init(struct netdevsim *ns);
111
112 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
113 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
114 struct net_device *dev);
115 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
116
117 #ifdef CONFIG_BPF_SYSCALL
118 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
119 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
120 int nsim_bpf_init(struct netdevsim *ns);
121 void nsim_bpf_uninit(struct netdevsim *ns);
122 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
123 int nsim_bpf_disable_tc(struct netdevsim *ns);
124 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
125 void *type_data, void *cb_priv);
126 #else
127
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)128 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
129 {
130 return 0;
131 }
132
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)133 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
134 {
135 }
nsim_bpf_init(struct netdevsim * ns)136 static inline int nsim_bpf_init(struct netdevsim *ns)
137 {
138 return 0;
139 }
140
nsim_bpf_uninit(struct netdevsim * ns)141 static inline void nsim_bpf_uninit(struct netdevsim *ns)
142 {
143 }
144
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)145 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
146 {
147 return -EOPNOTSUPP;
148 }
149
nsim_bpf_disable_tc(struct netdevsim * ns)150 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
151 {
152 return 0;
153 }
154
155 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)156 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
157 void *cb_priv)
158 {
159 return -EOPNOTSUPP;
160 }
161 #endif
162
163 enum nsim_resource_id {
164 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
165 NSIM_RESOURCE_IPV4,
166 NSIM_RESOURCE_IPV4_FIB,
167 NSIM_RESOURCE_IPV4_FIB_RULES,
168 NSIM_RESOURCE_IPV6,
169 NSIM_RESOURCE_IPV6_FIB,
170 NSIM_RESOURCE_IPV6_FIB_RULES,
171 NSIM_RESOURCE_NEXTHOPS,
172 };
173
174 struct nsim_dev_health {
175 struct devlink_health_reporter *empty_reporter;
176 struct devlink_health_reporter *dummy_reporter;
177 struct dentry *ddir;
178 char *recovered_break_msg;
179 u32 binary_len;
180 bool fail_recover;
181 };
182
183 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
184 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
185
186 #if IS_ENABLED(CONFIG_PSAMPLE)
187 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
188 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
189 #else
nsim_dev_psample_init(struct nsim_dev * nsim_dev)190 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
191 {
192 return 0;
193 }
194
nsim_dev_psample_exit(struct nsim_dev * nsim_dev)195 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
196 {
197 }
198 #endif
199
200 struct nsim_dev_port {
201 struct list_head list;
202 struct devlink_port devlink_port;
203 unsigned int port_index;
204 struct dentry *ddir;
205 struct netdevsim *ns;
206 };
207
208 struct nsim_dev {
209 struct nsim_bus_dev *nsim_bus_dev;
210 struct nsim_fib_data *fib_data;
211 struct nsim_trap_data *trap_data;
212 struct dentry *ddir;
213 struct dentry *ports_ddir;
214 struct dentry *take_snapshot;
215 struct bpf_offload_dev *bpf_dev;
216 bool bpf_bind_accept;
217 bool bpf_bind_verifier_accept;
218 u32 bpf_bind_verifier_delay;
219 struct dentry *ddir_bpf_bound_progs;
220 u32 prog_id_gen;
221 struct list_head bpf_bound_progs;
222 struct list_head bpf_bound_maps;
223 struct netdev_phys_item_id switch_id;
224 struct list_head port_list;
225 struct mutex port_list_lock; /* protects port list */
226 bool fw_update_status;
227 u32 fw_update_overwrite_mask;
228 u32 max_macs;
229 bool test1;
230 bool dont_allow_reload;
231 bool fail_reload;
232 struct devlink_region *dummy_region;
233 struct nsim_dev_health health;
234 struct flow_action_cookie *fa_cookie;
235 spinlock_t fa_cookie_lock; /* protects fa_cookie */
236 bool fail_trap_group_set;
237 bool fail_trap_policer_set;
238 bool fail_trap_policer_counter_get;
239 struct {
240 struct udp_tunnel_nic_shared utn_shared;
241 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
242 bool sync_all;
243 bool open_only;
244 bool ipv4_only;
245 bool shared;
246 bool static_iana_vxlan;
247 u32 sleep;
248 } udp_ports;
249 struct nsim_dev_psample *psample;
250 };
251
nsim_dev_net(struct nsim_dev * nsim_dev)252 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
253 {
254 return devlink_net(priv_to_devlink(nsim_dev));
255 }
256
257 int nsim_dev_init(void);
258 void nsim_dev_exit(void);
259 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
260 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
261 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
262 unsigned int port_index);
263 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
264 unsigned int port_index);
265
266 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
267 struct netlink_ext_ack *extack);
268 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
269 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
270 enum nsim_resource_id res_id, bool max);
271
272 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
273 void nsim_ipsec_init(struct netdevsim *ns);
274 void nsim_ipsec_teardown(struct netdevsim *ns);
275 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
276 #else
nsim_ipsec_init(struct netdevsim * ns)277 static inline void nsim_ipsec_init(struct netdevsim *ns)
278 {
279 }
280
nsim_ipsec_teardown(struct netdevsim * ns)281 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
282 {
283 }
284
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)285 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
286 {
287 return true;
288 }
289 #endif
290
291 struct nsim_vf_config {
292 int link_state;
293 u16 min_tx_rate;
294 u16 max_tx_rate;
295 u16 vlan;
296 __be16 vlan_proto;
297 u16 qos;
298 u8 vf_mac[ETH_ALEN];
299 bool spoofchk_enabled;
300 bool trusted;
301 bool rss_query_enabled;
302 };
303
304 struct nsim_bus_dev {
305 struct device dev;
306 struct list_head list;
307 unsigned int port_count;
308 struct net *initial_net; /* Purpose of this is to carry net pointer
309 * during the probe time only.
310 */
311 unsigned int num_vfs;
312 struct nsim_vf_config *vfconfigs;
313 /* Lock for devlink->reload_enabled in netdevsim module */
314 struct mutex nsim_bus_reload_lock;
315 bool init;
316 };
317
318 int nsim_bus_init(void);
319 void nsim_bus_exit(void);
320