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Update kernel-mirrored UAPI header file btf.h

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The distro kernel UAPI headers evolve too slow.
Thus, maintain a mirror in headers/linux/ in this proj.

Libbpf been overly-eager to get features into their releases
and depend on kernel commit 6089fb325cf7 ("bpf: Add btf enum64 support"),
which have not been released in an official kernel release yet.

Thus, this headers/linux/btf.h update comes from bpf-next git.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
This commit is contained in:
Jesper Dangaard Brouer
2022-09-02 13:24:08 +02:00
parent 9fe28d5577
commit 5d111a29ee
1 changed files with 19 additions and 8 deletions
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27
headers/linux/btf.h
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@@ -1,7 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Copyright (c) 2018 Facebook */ /* Copyright (c) 2018 Facebook */
#ifndef _UAPI__LINUX_BTF_H__ #ifndef __LINUX_BTF_H__
#define _UAPI__LINUX_BTF_H__ #define __LINUX_BTF_H__
#include <linux/types.h> #include <linux/types.h>
@@ -33,13 +33,13 @@ struct btf_type {
/* "info" bits arrangement /* "info" bits arrangement
* bits 0-15: vlen (e.g. # of struct's members) * bits 0-15: vlen (e.g. # of struct's members)
* bits 16-23: unused * bits 16-23: unused
* bits 24-27: kind (e.g. int, ptr, array...etc) * bits 24-28: kind (e.g. int, ptr, array...etc)
* bits 28-30: unused * bits 29-30: unused
* bit 31: kind_flag, currently used by * bit 31: kind_flag, currently used by
* struct, union and fwd * struct, union, enum, fwd and enum64
*/ */
__u32 info; __u32 info;
/* "size" is used by INT, ENUM, STRUCT, UNION and DATASEC. /* "size" is used by INT, ENUM, STRUCT, UNION, DATASEC and ENUM64.
* "size" tells the size of the type it is describing. * "size" tells the size of the type it is describing.
* *
* "type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT, * "type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT,
@@ -63,7 +63,7 @@ enum {
BTF_KIND_ARRAY = 3, /* Array */ BTF_KIND_ARRAY = 3, /* Array */
BTF_KIND_STRUCT = 4, /* Struct */ BTF_KIND_STRUCT = 4, /* Struct */
BTF_KIND_UNION = 5, /* Union */ BTF_KIND_UNION = 5, /* Union */
BTF_KIND_ENUM = 6, /* Enumeration */ BTF_KIND_ENUM = 6, /* Enumeration up to 32-bit values */
BTF_KIND_FWD = 7, /* Forward */ BTF_KIND_FWD = 7, /* Forward */
BTF_KIND_TYPEDEF = 8, /* Typedef */ BTF_KIND_TYPEDEF = 8, /* Typedef */
BTF_KIND_VOLATILE = 9, /* Volatile */ BTF_KIND_VOLATILE = 9, /* Volatile */
@@ -76,6 +76,7 @@ enum {
BTF_KIND_FLOAT = 16, /* Floating point */ BTF_KIND_FLOAT = 16, /* Floating point */
BTF_KIND_DECL_TAG = 17, /* Decl Tag */ BTF_KIND_DECL_TAG = 17, /* Decl Tag */
BTF_KIND_TYPE_TAG = 18, /* Type Tag */ BTF_KIND_TYPE_TAG = 18, /* Type Tag */
BTF_KIND_ENUM64 = 19, /* Enumeration up to 64-bit values */
NR_BTF_KINDS, NR_BTF_KINDS,
BTF_KIND_MAX = NR_BTF_KINDS - 1, BTF_KIND_MAX = NR_BTF_KINDS - 1,
@@ -186,4 +187,14 @@ struct btf_decl_tag {
__s32 component_idx; __s32 component_idx;
}; };
#endif /* _UAPI__LINUX_BTF_H__ */ /* BTF_KIND_ENUM64 is followed by multiple "struct btf_enum64".
* The exact number of btf_enum64 is stored in the vlen (of the
* info in "struct btf_type").
*/
struct btf_enum64 {
__u32 name_off;
__u32 val_lo32;
__u32 val_hi32;
};
#endif /* __LINUX_BTF_H__ */