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_port {
138 struct list_head list;
139 struct devlink_port devlink_port;
140 unsigned int port_index;
141 struct dentry *ddir;
142 struct netdevsim *ns;
143};
144
145struct nsim_dev {
146 struct nsim_bus_dev *nsim_bus_dev;
147 struct nsim_fib_data *fib_data;
148 struct dentry *ddir;
149 struct dentry *ports_ddir;
150 struct bpf_offload_dev *bpf_dev;
151 bool bpf_bind_accept;
152 u32 bpf_bind_verifier_delay;
153 struct dentry *ddir_bpf_bound_progs;
154 u32 prog_id_gen;
155 struct list_head bpf_bound_progs;
156 struct list_head bpf_bound_maps;
157 struct netdev_phys_item_id switch_id;
158 struct list_head port_list;
159 struct mutex port_list_lock; /* protects port list */
160 bool fw_update_status;
161};
162
163int nsim_dev_init(void);
164void nsim_dev_exit(void);
165int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
166void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
167int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
168 unsigned int port_index);
169int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
170 unsigned int port_index);
171
172int nsim_fib_init(void);
173void nsim_fib_exit(void);
174u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max);
175int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val,
176 struct netlink_ext_ack *extack);
177
178#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
179void nsim_ipsec_init(struct netdevsim *ns);
180void nsim_ipsec_teardown(struct netdevsim *ns);
181bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
182#else
183static inline void nsim_ipsec_init(struct netdevsim *ns)
184{
185}
186
187static inline void nsim_ipsec_teardown(struct netdevsim *ns)
188{
189}
190
191static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
192{
193 return true;
194}
195#endif
196
197struct nsim_vf_config {
198 int link_state;
199 u16 min_tx_rate;
200 u16 max_tx_rate;
201 u16 vlan;
202 __be16 vlan_proto;
203 u16 qos;
204 u8 vf_mac[ETH_ALEN];
205 bool spoofchk_enabled;
206 bool trusted;
207 bool rss_query_enabled;
208};
209
210struct nsim_bus_dev {
211 struct device dev;
212 struct list_head list;
213 unsigned int port_count;
214 unsigned int num_vfs;
215 struct nsim_vf_config *vfconfigs;
216};
217
218int nsim_bus_init(void);
219void nsim_bus_exit(void);