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