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
22#define DRV_NAME "netdevsim"
23
24#define NSIM_XDP_MAX_MTU 4000
25
26#define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
27
28struct bpf_prog;
29struct dentry;
30struct nsim_vf_config;
31
32struct netdevsim {
33 struct net_device *netdev;
34
35 u64 tx_packets;
36 u64 tx_bytes;
37 struct u64_stats_sync syncp;
38
39 struct device dev;
40
41 struct dentry *ddir;
42
43 unsigned int num_vfs;
44 struct nsim_vf_config *vfconfigs;
45
46 struct bpf_prog *bpf_offloaded;
47 u32 bpf_offloaded_id;
48
49 u32 xdp_flags;
50 int xdp_prog_mode;
51 struct bpf_prog *xdp_prog;
52
53 u32 prog_id_gen;
54
55 bool bpf_bind_accept;
56 u32 bpf_bind_verifier_delay;
57 struct dentry *ddir_bpf_bound_progs;
58 struct list_head bpf_bound_progs;
59
60 bool bpf_tc_accept;
61 bool bpf_tc_non_bound_accept;
62 bool bpf_xdpdrv_accept;
63 bool bpf_xdpoffload_accept;
64
65 bool bpf_map_accept;
66 struct list_head bpf_bound_maps;
67#if IS_ENABLED(CONFIG_NET_DEVLINK)
68 struct devlink *devlink;
69#endif
70};
71
72extern struct dentry *nsim_ddir;
73
74#ifdef CONFIG_BPF_SYSCALL
75int nsim_bpf_init(struct netdevsim *ns);
76void nsim_bpf_uninit(struct netdevsim *ns);
77int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
78int nsim_bpf_disable_tc(struct netdevsim *ns);
79int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
80 void *type_data, void *cb_priv);
81#else
82static inline int nsim_bpf_init(struct netdevsim *ns)
83{
84 return 0;
85}
86
87static inline void nsim_bpf_uninit(struct netdevsim *ns)
88{
89}
90
91static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
92{
93 return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP;
94}
95
96static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
97{
98 return 0;
99}
100
101static inline int
102nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
103 void *cb_priv)
104{
105 return -EOPNOTSUPP;
106}
107#endif
108
109#if IS_ENABLED(CONFIG_NET_DEVLINK)
110enum nsim_resource_id {
111 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
112 NSIM_RESOURCE_IPV4,
113 NSIM_RESOURCE_IPV4_FIB,
114 NSIM_RESOURCE_IPV4_FIB_RULES,
115 NSIM_RESOURCE_IPV6,
116 NSIM_RESOURCE_IPV6_FIB,
117 NSIM_RESOURCE_IPV6_FIB_RULES,
118};
119
120int nsim_devlink_setup(struct netdevsim *ns);
121void nsim_devlink_teardown(struct netdevsim *ns);
122
123int nsim_devlink_init(void);
124void nsim_devlink_exit(void);
125
126int nsim_fib_init(void);
127void nsim_fib_exit(void);
128u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max);
129int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val);
130#else
131static inline int nsim_devlink_setup(struct netdevsim *ns)
132{
133 return 0;
134}
135
136static inline void nsim_devlink_teardown(struct netdevsim *ns)
137{
138}
139
140static inline int nsim_devlink_init(void)
141{
142 return 0;
143}
144
145static inline void nsim_devlink_exit(void)
146{
147}
148#endif
149
150static inline struct netdevsim *to_nsim(struct device *ptr)
151{
152 return container_of(ptr, struct netdevsim, dev);
153}