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/device.h>
17#include <linux/kernel.h>
18#include <linux/list.h>
19#include <linux/netdevice.h>
20#include <linux/u64_stats_sync.h>
21#include <net/devlink.h>
22#include <net/xdp.h>
23
24#define DRV_NAME "netdevsim"
25
26#define NSIM_XDP_MAX_MTU 4000
27
28#define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
29
30#define NSIM_IPSEC_MAX_SA_COUNT 33
31#define NSIM_IPSEC_VALID BIT(31)
32
33struct nsim_sa {
34 struct xfrm_state *xs;
35 __be32 ipaddr[4];
36 u32 key[4];
37 u32 salt;
38 bool used;
39 bool crypt;
40 bool rx;
41};
42
43struct nsim_ipsec {
44 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
45 struct dentry *pfile;
46 u32 count;
47 u32 tx;
48 u32 ok;
49};
50
51struct netdevsim {
52 struct net_device *netdev;
53 struct nsim_dev *nsim_dev;
54 struct nsim_dev_port *nsim_dev_port;
55
56 u64 tx_packets;
57 u64 tx_bytes;
58 struct u64_stats_sync syncp;
59
60 struct nsim_bus_dev *nsim_bus_dev;
61
62 struct bpf_prog *bpf_offloaded;
63 u32 bpf_offloaded_id;
64
65 struct xdp_attachment_info xdp;
66 struct xdp_attachment_info xdp_hw;
67
68 bool bpf_tc_accept;
69 bool bpf_tc_non_bound_accept;
70 bool bpf_xdpdrv_accept;
71 bool bpf_xdpoffload_accept;
72
73 bool bpf_map_accept;
74 struct nsim_ipsec ipsec;
75};
76
77struct netdevsim *
78nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
79void nsim_destroy(struct netdevsim *ns);
80
81#ifdef CONFIG_BPF_SYSCALL
82int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
83void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
84int nsim_bpf_init(struct netdevsim *ns);
85void nsim_bpf_uninit(struct netdevsim *ns);
86int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
87int nsim_bpf_disable_tc(struct netdevsim *ns);
88int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
89 void *type_data, void *cb_priv);
90#else
91
92static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
93{
94 return 0;
95}
96
97static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
98{
99}
100static inline int nsim_bpf_init(struct netdevsim *ns)
101{
102 return 0;
103}
104
105static inline void nsim_bpf_uninit(struct netdevsim *ns)
106{
107}
108
109static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
110{
111 return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP;
112}
113
114static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
115{
116 return 0;
117}
118
119static inline int
120nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
121 void *cb_priv)
122{
123 return -EOPNOTSUPP;
124}
125#endif
126
127enum nsim_resource_id {
128 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
129 NSIM_RESOURCE_IPV4,
130 NSIM_RESOURCE_IPV4_FIB,
131 NSIM_RESOURCE_IPV4_FIB_RULES,
132 NSIM_RESOURCE_IPV6,
133 NSIM_RESOURCE_IPV6_FIB,
134 NSIM_RESOURCE_IPV6_FIB_RULES,
135};
136
137struct nsim_dev_health {
138 struct devlink_health_reporter *empty_reporter;
139 struct devlink_health_reporter *dummy_reporter;
140 struct dentry *ddir;
141 char *recovered_break_msg;
142 u32 binary_len;
143 bool fail_recover;
144};
145
146int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
147void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
148
149struct nsim_dev_port {
150 struct list_head list;
151 struct devlink_port devlink_port;
152 unsigned int port_index;
153 struct dentry *ddir;
154 struct netdevsim *ns;
155};
156
157struct nsim_dev {
158 struct nsim_bus_dev *nsim_bus_dev;
159 struct nsim_fib_data *fib_data;
160 struct nsim_trap_data *trap_data;
161 struct dentry *ddir;
162 struct dentry *ports_ddir;
163 struct bpf_offload_dev *bpf_dev;
164 bool bpf_bind_accept;
165 u32 bpf_bind_verifier_delay;
166 struct dentry *ddir_bpf_bound_progs;
167 u32 prog_id_gen;
168 struct list_head bpf_bound_progs;
169 struct list_head bpf_bound_maps;
170 struct netdev_phys_item_id switch_id;
171 struct list_head port_list;
172 struct mutex port_list_lock; /* protects port list */
173 bool fw_update_status;
174 u32 max_macs;
175 bool test1;
176 bool dont_allow_reload;
177 bool fail_reload;
178 struct devlink_region *dummy_region;
179 struct nsim_dev_health health;
180};
181
182static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
183{
184 return devlink_net(priv_to_devlink(nsim_dev));
185}
186
187int nsim_dev_init(void);
188void nsim_dev_exit(void);
189int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
190void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
191int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
192 unsigned int port_index);
193int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
194 unsigned int port_index);
195
196struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
197 struct netlink_ext_ack *extack);
198void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
199u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
200 enum nsim_resource_id res_id, bool max);
201
202#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
203void nsim_ipsec_init(struct netdevsim *ns);
204void nsim_ipsec_teardown(struct netdevsim *ns);
205bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
206#else
207static inline void nsim_ipsec_init(struct netdevsim *ns)
208{
209}
210
211static inline void nsim_ipsec_teardown(struct netdevsim *ns)
212{
213}
214
215static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
216{
217 return true;
218}
219#endif
220
221struct nsim_vf_config {
222 int link_state;
223 u16 min_tx_rate;
224 u16 max_tx_rate;
225 u16 vlan;
226 __be16 vlan_proto;
227 u16 qos;
228 u8 vf_mac[ETH_ALEN];
229 bool spoofchk_enabled;
230 bool trusted;
231 bool rss_query_enabled;
232};
233
234struct nsim_bus_dev {
235 struct device dev;
236 struct list_head list;
237 unsigned int port_count;
238 struct net *initial_net; /* Purpose of this is to carry net pointer
239 * during the probe time only.
240 */
241 unsigned int num_vfs;
242 struct nsim_vf_config *vfconfigs;
243};
244
245int nsim_bus_init(void);
246void nsim_bus_exit(void);