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