1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* alloc_tag IOCTL API definition
*
* Copyright (C) 2026 Google, LLC. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _UAPI_ALLOC_TAG_H
#define _UAPI_ALLOC_TAG_H
#include <linux/types.h>
/*
* Function, file and module names often have the same prefixes, therefore
* when filtering by these criteria, we compare the last 64 characters to
* minimize the chances of name collisions
*/
#define ALLOCINFO_STR_SIZE 64
struct allocinfo_content_id {
__u64 id;
};
struct allocinfo_tag {
/* Longer names are trimmed */
char modname[ALLOCINFO_STR_SIZE];
char function[ALLOCINFO_STR_SIZE];
char filename[ALLOCINFO_STR_SIZE];
__u64 lineno;
};
/* The alignment ensures 32-bit compatible interfaces are not broken */
struct allocinfo_counter {
__u64 bytes;
__u64 calls;
__u8 accurate;
} __attribute__((aligned(8)));
struct allocinfo_tag_data {
struct allocinfo_tag tag;
struct allocinfo_counter counter;
};
enum {
ALLOCINFO_FILTER_MODNAME,
ALLOCINFO_FILTER_FUNCTION,
ALLOCINFO_FILTER_FILENAME,
ALLOCINFO_FILTER_LINENO,
ALLOCINFO_FILTER_INACCURATE,
ALLOCINFO_FILTER_MIN_SIZE,
ALLOCINFO_FILTER_MAX_SIZE,
__ALLOCINFO_FILTER_LAST = ALLOCINFO_FILTER_MAX_SIZE
};
#define ALLOCINFO_FILTER_MASK_MODNAME (1 << ALLOCINFO_FILTER_MODNAME)
#define ALLOCINFO_FILTER_MASK_FUNCTION (1 << ALLOCINFO_FILTER_FUNCTION)
#define ALLOCINFO_FILTER_MASK_FILENAME (1 << ALLOCINFO_FILTER_FILENAME)
#define ALLOCINFO_FILTER_MASK_LINENO (1 << ALLOCINFO_FILTER_LINENO)
#define ALLOCINFO_FILTER_MASK_INACCURATE (1 << ALLOCINFO_FILTER_INACCURATE)
#define ALLOCINFO_FILTER_MASK_MIN_SIZE (1 << ALLOCINFO_FILTER_MIN_SIZE)
#define ALLOCINFO_FILTER_MASK_MAX_SIZE (1 << ALLOCINFO_FILTER_MAX_SIZE)
#define ALLOCINFO_FILTER_MASKS \
((1 << (__ALLOCINFO_FILTER_LAST + 1)) - 1)
struct allocinfo_filter {
__u64 mask; /* bitmask of the filter fields used */
struct allocinfo_tag fields;
__u64 min_size;
__u64 max_size;
/* filter criteria only; see allocinfo_counter.accurate for actual accuracy */
__u64 inaccurate;
};
struct allocinfo_get_at {
/* inputs */
__u64 pos;
struct allocinfo_filter filter;
/* output */
struct allocinfo_tag_data data;
};
#define _ALLOCINFO_IOC_CONTENT_ID 0
#define _ALLOCINFO_IOC_GET_AT 1
#define _ALLOCINFO_IOC_GET_NEXT 2
#define ALLOCINFO_IOC_BASE 0xA6
#define ALLOCINFO_IOC_CONTENT_ID _IOR(ALLOCINFO_IOC_BASE, _ALLOCINFO_IOC_CONTENT_ID, \
struct allocinfo_content_id)
#define ALLOCINFO_IOC_GET_AT _IOWR(ALLOCINFO_IOC_BASE, _ALLOCINFO_IOC_GET_AT, \
struct allocinfo_get_at)
#define ALLOCINFO_IOC_GET_NEXT _IOR(ALLOCINFO_IOC_BASE, _ALLOCINFO_IOC_GET_NEXT, \
struct allocinfo_tag_data)
#endif /* _UAPI_ALLOC_TAG_H */
|
