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Merge "bpf_helpers: infra for per sdk level bpf programs" into main

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Treehugger Robot 2025-01-21 15:47:53 -08:00 • committed by Gerrit Code Review
commit 0d6fccda52
1 changed files with 21 additions and 0 deletions
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21
bpf/headers/include/bpf_helpers.h
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@ -141,6 +141,27 @@ struct kver_uint { unsigned int kver; };
#define KVER_IS_AT_LEAST(kver, a, b, c) ((kver).kver >= KVER(a, b, c).kver)
// Helpers for writing sdk level specific bpf programs
//
// Note: we choose to follow sdk api level values, but there is no real need for this:
// These just need to be monotonically increasing. We could also use values ten or even
// a hundred times larger to leave room for quarters or months. We may also just use
// dates or something (2502 or 202506 for 25Q2) or even the mainline bpfloader version...
// For now this easily suffices for our use case.
struct sdk_level_uint { unsigned int sdk_level; };
#define SDK_LEVEL_(v) ((struct sdk_level_uint){ .sdk_level = (v) })
#define SDK_LEVEL_NONE SDK_LEVEL_(0)
#define SDK_LEVEL_S SDK_LEVEL_(31) // Android 12
#define SDK_LEVEL_Sv2 SDK_LEVEL_(32) // Android 12L
#define SDK_LEVEL_T SDK_LEVEL_(33) // Android 13
#define SDK_LEVEL_U SDK_LEVEL_(34) // Android 14
#define SDK_LEVEL_V SDK_LEVEL_(35) // Android 15
#define SDK_LEVEL_24Q3 SDK_LEVEL_V
#define SDK_LEVEL_25Q2 SDK_LEVEL_(36) // Android 16
#define SDK_LEVEL_IS_AT_LEAST(lvl, v) ((lvl).sdk_level >= (SDK_LEVEL_##v).sdk_level)
/*
* BPFFS (ie. /sys/fs/bpf) labelling is as follows:
* subdirectory selinux context mainline usecase / usable by