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Viewing File: /usr/src/kernels/5.14.0-570.32.1.el9_6.x86_64/include/linux/bpf-cgroup-defs.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BPF_CGROUP_DEFS_H
#define _BPF_CGROUP_DEFS_H

#ifdef CONFIG_CGROUP_BPF

#include <linux/list.h>
#include <linux/percpu-refcount.h>
#include <linux/workqueue.h>

struct bpf_prog_array;

#ifdef CONFIG_BPF_LSM
/* Maximum number of concurrently attachable per-cgroup LSM hooks. */
#define CGROUP_LSM_NUM 10
#else
#define CGROUP_LSM_NUM 0
#endif

enum cgroup_bpf_attach_type {
	CGROUP_BPF_ATTACH_TYPE_INVALID = -1,
	CGROUP_INET_INGRESS = 0,
	CGROUP_INET_EGRESS,
	CGROUP_INET_SOCK_CREATE,
	CGROUP_SOCK_OPS,
	CGROUP_DEVICE,
	CGROUP_INET4_BIND,
	CGROUP_INET6_BIND,
	CGROUP_INET4_CONNECT,
	CGROUP_INET6_CONNECT,
	CGROUP_INET4_POST_BIND,
	CGROUP_INET6_POST_BIND,
	CGROUP_UDP4_SENDMSG,
	CGROUP_UDP6_SENDMSG,
	CGROUP_SYSCTL,
	CGROUP_UDP4_RECVMSG,
	CGROUP_UDP6_RECVMSG,
	CGROUP_GETSOCKOPT,
	CGROUP_SETSOCKOPT,
	CGROUP_INET4_GETPEERNAME,
	CGROUP_INET6_GETPEERNAME,
	CGROUP_INET4_GETSOCKNAME,
	CGROUP_INET6_GETSOCKNAME,
	CGROUP_INET_SOCK_RELEASE,
	CGROUP_LSM_START,
	CGROUP_LSM_END = CGROUP_LSM_START + CGROUP_LSM_NUM - 1,
	MAX_CGROUP_BPF_ATTACH_TYPE
};

struct cgroup_bpf {
	/* array of effective progs in this cgroup */
	struct bpf_prog_array __rcu *effective[MAX_CGROUP_BPF_ATTACH_TYPE];

	/* attached progs to this cgroup and attach flags
	 * when flags == 0 or BPF_F_ALLOW_OVERRIDE the progs list will
	 * have either zero or one element
	 * when BPF_F_ALLOW_MULTI the list can have up to BPF_CGROUP_MAX_PROGS
	 */
	struct hlist_head progs[MAX_CGROUP_BPF_ATTACH_TYPE];
	u8 flags[MAX_CGROUP_BPF_ATTACH_TYPE];

	/* list of cgroup shared storages */
	struct list_head storages;

	/* temp storage for effective prog array used by prog_attach/detach */
	struct bpf_prog_array *inactive;

	/* reference counter used to detach bpf programs after cgroup removal */
	struct percpu_ref refcnt;

	/* cgroup_bpf is released using a work queue */
	struct work_struct release_work;
};

#else /* CONFIG_CGROUP_BPF */
struct cgroup_bpf {};
#endif /* CONFIG_CGROUP_BPF */

#endif
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