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/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
36struct 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
46struct 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
54struct nsim_ethtool {
55 bool rx;
56 bool tx;
57 bool report_stats_rx;
58 bool report_stats_tx;
59};
60
61struct 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
96struct netdevsim *
97nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
98void nsim_destroy(struct netdevsim *ns);
99
100void nsim_ethtool_init(struct netdevsim *ns);
101
102void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
103int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
104 struct net_device *dev);
105void nsim_udp_tunnels_info_destroy(struct net_device *dev);
106
107#ifdef CONFIG_BPF_SYSCALL
108int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
109void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
110int nsim_bpf_init(struct netdevsim *ns);
111void nsim_bpf_uninit(struct netdevsim *ns);
112int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
113int nsim_bpf_disable_tc(struct netdevsim *ns);
114int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
115 void *type_data, void *cb_priv);
116#else
117
118static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
119{
120 return 0;
121}
122
123static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
124{
125}
126static inline int nsim_bpf_init(struct netdevsim *ns)
127{
128 return 0;
129}
130
131static inline void nsim_bpf_uninit(struct netdevsim *ns)
132{
133}
134
135static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
136{
137 return -EOPNOTSUPP;
138}
139
140static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
141{
142 return 0;
143}
144
145static inline int
146nsim_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
153enum 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
163struct 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
172int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
173void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
174
175struct 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
183struct 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 u32 bpf_bind_verifier_delay;
193 struct dentry *ddir_bpf_bound_progs;
194 u32 prog_id_gen;
195 struct list_head bpf_bound_progs;
196 struct list_head bpf_bound_maps;
197 struct netdev_phys_item_id switch_id;
198 struct list_head port_list;
199 struct mutex port_list_lock; /* protects port list */
200 bool fw_update_status;
201 u32 fw_update_overwrite_mask;
202 u32 max_macs;
203 bool test1;
204 bool dont_allow_reload;
205 bool fail_reload;
206 struct devlink_region *dummy_region;
207 struct nsim_dev_health health;
208 struct flow_action_cookie *fa_cookie;
209 spinlock_t fa_cookie_lock; /* protects fa_cookie */
210 bool fail_trap_group_set;
211 bool fail_trap_policer_set;
212 bool fail_trap_policer_counter_get;
213 struct {
214 struct udp_tunnel_nic_shared utn_shared;
215 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
216 bool sync_all;
217 bool open_only;
218 bool ipv4_only;
219 bool shared;
220 bool static_iana_vxlan;
221 u32 sleep;
222 } udp_ports;
223};
224
225static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
226{
227 return devlink_net(priv_to_devlink(nsim_dev));
228}
229
230int nsim_dev_init(void);
231void nsim_dev_exit(void);
232int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
233void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
234int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
235 unsigned int port_index);
236int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
237 unsigned int port_index);
238
239struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
240 struct netlink_ext_ack *extack);
241void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
242u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
243 enum nsim_resource_id res_id, bool max);
244
245#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
246void nsim_ipsec_init(struct netdevsim *ns);
247void nsim_ipsec_teardown(struct netdevsim *ns);
248bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
249#else
250static inline void nsim_ipsec_init(struct netdevsim *ns)
251{
252}
253
254static inline void nsim_ipsec_teardown(struct netdevsim *ns)
255{
256}
257
258static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
259{
260 return true;
261}
262#endif
263
264struct nsim_vf_config {
265 int link_state;
266 u16 min_tx_rate;
267 u16 max_tx_rate;
268 u16 vlan;
269 __be16 vlan_proto;
270 u16 qos;
271 u8 vf_mac[ETH_ALEN];
272 bool spoofchk_enabled;
273 bool trusted;
274 bool rss_query_enabled;
275};
276
277struct nsim_bus_dev {
278 struct device dev;
279 struct list_head list;
280 unsigned int port_count;
281 struct net *initial_net; /* Purpose of this is to carry net pointer
282 * during the probe time only.
283 */
284 unsigned int num_vfs;
285 struct nsim_vf_config *vfconfigs;
286 /* Lock for devlink->reload_enabled in netdevsim module */
287 struct mutex nsim_bus_reload_lock;
288 bool init;
289};
290
291int nsim_bus_init(void);
292void nsim_bus_exit(void);