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
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