mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-15 23:25:07 +00:00
c0e19f2c9a
Previous patch adds 1:1 mapping between all 211 LSM hooks
and bpf_cgroup program array. Instead of reserving a slot per
possible hook, reserve 10 slots per cgroup for lsm programs.
Those slots are dynamically allocated on demand and reclaimed.
struct cgroup_bpf {
struct bpf_prog_array * effective[33]; /* 0 264 */
/* --- cacheline 4 boundary (256 bytes) was 8 bytes ago --- */
struct hlist_head progs[33]; /* 264 264 */
/* --- cacheline 8 boundary (512 bytes) was 16 bytes ago --- */
u8 flags[33]; /* 528 33 */
/* XXX 7 bytes hole, try to pack */
struct list_head storages; /* 568 16 */
/* --- cacheline 9 boundary (576 bytes) was 8 bytes ago --- */
struct bpf_prog_array * inactive; /* 584 8 */
struct percpu_ref refcnt; /* 592 16 */
struct work_struct release_work; /* 608 72 */
/* size: 680, cachelines: 11, members: 7 */
/* sum members: 673, holes: 1, sum holes: 7 */
/* last cacheline: 40 bytes */
};
Reviewed-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20220628174314.1216643-5-sdf@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
79 lines
2 KiB
C
79 lines
2 KiB
C
/* 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
|