1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BPF_CGROUP_DEFS_H |
3 | #define _BPF_CGROUP_DEFS_H |
4 | |
5 | #ifdef CONFIG_CGROUP_BPF |
6 | |
7 | #include <linux/list.h> |
8 | #include <linux/percpu-refcount.h> |
9 | #include <linux/workqueue.h> |
10 | |
11 | struct bpf_prog_array; |
12 | |
13 | #ifdef CONFIG_BPF_LSM |
14 | /* Maximum number of concurrently attachable per-cgroup LSM hooks. */ |
15 | #define CGROUP_LSM_NUM 10 |
16 | #else |
17 | #define CGROUP_LSM_NUM 0 |
18 | #endif |
19 | |
20 | enum cgroup_bpf_attach_type { |
21 | CGROUP_BPF_ATTACH_TYPE_INVALID = -1, |
22 | CGROUP_INET_INGRESS = 0, |
23 | CGROUP_INET_EGRESS, |
24 | CGROUP_INET_SOCK_CREATE, |
25 | CGROUP_SOCK_OPS, |
26 | CGROUP_DEVICE, |
27 | CGROUP_INET4_BIND, |
28 | CGROUP_INET6_BIND, |
29 | CGROUP_INET4_CONNECT, |
30 | CGROUP_INET6_CONNECT, |
31 | CGROUP_UNIX_CONNECT, |
32 | CGROUP_INET4_POST_BIND, |
33 | CGROUP_INET6_POST_BIND, |
34 | CGROUP_UDP4_SENDMSG, |
35 | CGROUP_UDP6_SENDMSG, |
36 | CGROUP_UNIX_SENDMSG, |
37 | CGROUP_SYSCTL, |
38 | CGROUP_UDP4_RECVMSG, |
39 | CGROUP_UDP6_RECVMSG, |
40 | CGROUP_UNIX_RECVMSG, |
41 | CGROUP_GETSOCKOPT, |
42 | CGROUP_SETSOCKOPT, |
43 | CGROUP_INET4_GETPEERNAME, |
44 | CGROUP_INET6_GETPEERNAME, |
45 | CGROUP_UNIX_GETPEERNAME, |
46 | CGROUP_INET4_GETSOCKNAME, |
47 | CGROUP_INET6_GETSOCKNAME, |
48 | CGROUP_UNIX_GETSOCKNAME, |
49 | CGROUP_INET_SOCK_RELEASE, |
50 | CGROUP_LSM_START, |
51 | CGROUP_LSM_END = CGROUP_LSM_START + CGROUP_LSM_NUM - 1, |
52 | MAX_CGROUP_BPF_ATTACH_TYPE |
53 | }; |
54 | |
55 | struct cgroup_bpf { |
56 | /* array of effective progs in this cgroup */ |
57 | struct bpf_prog_array __rcu *effective[MAX_CGROUP_BPF_ATTACH_TYPE]; |
58 | |
59 | /* attached progs to this cgroup and attach flags |
60 | * when flags == 0 or BPF_F_ALLOW_OVERRIDE the progs list will |
61 | * have either zero or one element |
62 | * when BPF_F_ALLOW_MULTI the list can have up to BPF_CGROUP_MAX_PROGS |
63 | */ |
64 | struct hlist_head progs[MAX_CGROUP_BPF_ATTACH_TYPE]; |
65 | u8 flags[MAX_CGROUP_BPF_ATTACH_TYPE]; |
66 | |
67 | /* list of cgroup shared storages */ |
68 | struct list_head storages; |
69 | |
70 | /* temp storage for effective prog array used by prog_attach/detach */ |
71 | struct bpf_prog_array *inactive; |
72 | |
73 | /* reference counter used to detach bpf programs after cgroup removal */ |
74 | struct percpu_ref refcnt; |
75 | |
76 | /* cgroup_bpf is released using a work queue */ |
77 | struct work_struct release_work; |
78 | }; |
79 | |
80 | #else /* CONFIG_CGROUP_BPF */ |
81 | struct cgroup_bpf {}; |
82 | #endif /* CONFIG_CGROUP_BPF */ |
83 | |
84 | #endif |
85 | |