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fdb5c4531c
If the kernel is compiled with CONFIG_CGROUP_BPF not enabled, it is not
possible to attach, detach or query IR BPF programs to /dev/lircN devices,
making them impossible to use. For embedded devices, it should be possible
to use IR decoding without cgroups or CONFIG_CGROUP_BPF enabled.
This change requires some refactoring, since bpf_prog_{attach,detach,query}
functions are now always compiled, but their code paths for cgroups need
moving out. Rather than a #ifdef CONFIG_CGROUP_BPF in kernel/bpf/syscall.c,
moving them to kernel/bpf/cgroup.c and kernel/bpf/sockmap.c does not
require #ifdefs since that is already conditionally compiled.
Fixes: f4364dcfc8 ("media: rc: introduce BPF_PROG_LIRC_MODE2")
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
30 lines
698 B
C
30 lines
698 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BPF_LIRC_H
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#define _BPF_LIRC_H
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#include <uapi/linux/bpf.h>
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#ifdef CONFIG_BPF_LIRC_MODE2
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int lirc_prog_attach(const union bpf_attr *attr, struct bpf_prog *prog);
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int lirc_prog_detach(const union bpf_attr *attr);
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int lirc_prog_query(const union bpf_attr *attr, union bpf_attr __user *uattr);
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#else
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static inline int lirc_prog_attach(const union bpf_attr *attr,
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struct bpf_prog *prog)
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{
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return -EINVAL;
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}
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static inline int lirc_prog_detach(const union bpf_attr *attr)
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{
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return -EINVAL;
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}
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static inline int lirc_prog_query(const union bpf_attr *attr,
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union bpf_attr __user *uattr)
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{
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return -EINVAL;
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}
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#endif
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#endif /* _BPF_LIRC_H */
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