/* Common BPF helpers to be used by all BPF programs loaded by Android */ #include #include #include #include "bpf_map_def.h" /****************************************************************************** * WARNING: CHANGES TO THIS FILE OUTSIDE OF AOSP/MAIN ARE LIKELY TO BREAK * * DEVICE COMPATIBILITY WITH MAINLINE MODULES SHIPPING EBPF CODE. * * * * THIS WILL LIKELY RESULT IN BRICKED DEVICES AT SOME ARBITRARY FUTURE TIME * * * * THAT GOES ESPECIALLY FOR THE 'SECTION' 'LICENSE' AND 'CRITICAL' MACROS * * * * We strongly suggest that if you need changes to bpfloader functionality * * you get your changes reviewed and accepted into aosp/master. * * * ******************************************************************************/ // The actual versions of the bpfloader that shipped in various Android releases // Android P/Q/R: BpfLoader was initially part of netd, // this was later split out into a standalone binary, but was unversioned. // Android S / 12 (api level 31) - added 'tethering' mainline eBPF support #define BPFLOADER_S_VERSION 2u // Android T / 13 (api level 33) - support for shared/selinux_context/pindir #define BPFLOADER_T_VERSION 19u // BpfLoader v0.25+ support obj@ver.o files #define BPFLOADER_OBJ_AT_VER_VERSION 25u // Bpfloader v0.33+ supports {map,prog}.ignore_on_{eng,user,userdebug} #define BPFLOADER_IGNORED_ON_VERSION 33u // Android U / 14 (api level 34) - various new program types added #define BPFLOADER_U_VERSION 38u // Android U QPR2 / 14 (api level 34) - platform only // (note: the platform bpfloader in V isn't really versioned at all, // as there is no need as it can only load objects compiled at the // same time as itself and the rest of the platform) #define BPFLOADER_U_QPR2_VERSION 41u #define BPFLOADER_PLATFORM_VERSION BPFLOADER_U_QPR2_VERSION // Android Mainline - this bpfloader should eventually go back to T (or even S) // Note: this value (and the following +1u's) are hardcoded in NetBpfLoad.cpp #define BPFLOADER_MAINLINE_VERSION 42u // Android Mainline BpfLoader when running on Android T (sdk=33) #define BPFLOADER_MAINLINE_T_VERSION (BPFLOADER_MAINLINE_VERSION + 1u) // Android Mainline BpfLoader when running on Android U (sdk=34) #define BPFLOADER_MAINLINE_U_VERSION (BPFLOADER_MAINLINE_T_VERSION + 1u) // Android Mainline BpfLoader when running on Android U QPR3 #define BPFLOADER_MAINLINE_U_QPR3_VERSION (BPFLOADER_MAINLINE_U_VERSION + 1u) // Android Mainline BpfLoader when running on Android V (sdk=35) #define BPFLOADER_MAINLINE_V_VERSION (BPFLOADER_MAINLINE_U_QPR3_VERSION + 1u) // Android Mainline BpfLoader when running on Android W (sdk=36) #define BPFLOADER_MAINLINE_W_VERSION (BPFLOADER_MAINLINE_V_VERSION + 1u) /* For mainline module use, you can #define BPFLOADER_{MIN/MAX}_VER * before #include "bpf_helpers.h" to change which bpfloaders will * process the resulting .o file. * * While this will work outside of mainline too, there just is no point to * using it when the .o and the bpfloader ship in sync with each other. * In which case it's just best to use the default. */ #ifndef BPFLOADER_MIN_VER #define BPFLOADER_MIN_VER BPFLOADER_PLATFORM_VERSION // inclusive, ie. >= #endif #ifndef BPFLOADER_MAX_VER #define BPFLOADER_MAX_VER 0x10000u // exclusive, ie. < v1.0 #endif /* place things in different elf sections */ #define SECTION(NAME) __attribute__((section(NAME), used)) /* Must be present in every program, example usage: * LICENSE("GPL"); or LICENSE("Apache 2.0"); * * We also take this opportunity to embed a bunch of other useful values in * the resulting .o (This is to enable some limited forward compatibility * with mainline module shipped ebpf programs) * * The bpfloader_{min/max}_ver defines the [min, max) range of bpfloader * versions that should load this .o file (bpfloaders outside of this range * will simply ignore/skip this *entire* .o) * The [inclusive,exclusive) matches what we do for kernel ver dependencies. * * The size_of_bpf_{map,prog}_def allow the bpfloader to load programs where * these structures have been extended with additional fields (they will of * course simply be ignored then). * * If missing, bpfloader_{min/max}_ver default to 0/0x10000 ie. [v0.0, v1.0), * while size_of_bpf_{map/prog}_def default to 32/20 which are the v0.0 sizes. * * This macro also disables loading BTF map debug information, as versions * of the platform bpfloader that support BTF require fork-exec of btfloader * which causes a regression in boot time. */ #define LICENSE(NAME) \ unsigned int _bpfloader_min_ver SECTION("bpfloader_min_ver") = BPFLOADER_MIN_VER; \ unsigned int _bpfloader_max_ver SECTION("bpfloader_max_ver") = BPFLOADER_MAX_VER; \ size_t _size_of_bpf_map_def SECTION("size_of_bpf_map_def") = sizeof(struct bpf_map_def); \ size_t _size_of_bpf_prog_def SECTION("size_of_bpf_prog_def") = sizeof(struct bpf_prog_def); \ unsigned _btf_min_bpfloader_ver SECTION("btf_min_bpfloader_ver") = BPFLOADER_MAINLINE_VERSION; \ unsigned _btf_user_min_bpfloader_ver SECTION("btf_user_min_bpfloader_ver") = 0xFFFFFFFFu; \ char _license[] SECTION("license") = (NAME) /* flag the resulting bpf .o file as critical to system functionality, * loading all kernel version appropriate programs in it must succeed * for bpfloader success */ #define CRITICAL(REASON) char _critical[] SECTION("critical") = (REASON) /* * Helper functions called from eBPF programs written in C. These are * implemented in the kernel sources. */ struct kver_uint { unsigned int kver; }; #define KVER_(v) ((struct kver_uint){ .kver = (v) }) #define KVER(a, b, c) KVER_(((a) << 24) + ((b) << 16) + (c)) #define KVER_NONE KVER_(0) #define KVER_4_14 KVER(4, 14, 0) #define KVER_4_19 KVER(4, 19, 0) #define KVER_5_4 KVER(5, 4, 0) #define KVER_5_8 KVER(5, 8, 0) #define KVER_5_9 KVER(5, 9, 0) #define KVER_5_10 KVER(5, 10, 0) #define KVER_5_15 KVER(5, 15, 0) #define KVER_6_1 KVER(6, 1, 0) #define KVER_6_6 KVER(6, 6, 0) #define KVER_INF KVER_(0xFFFFFFFFu) #define KVER_IS_AT_LEAST(kver, a, b, c) ((kver).kver >= KVER(a, b, c).kver) /* * BPFFS (ie. /sys/fs/bpf) labelling is as follows: * subdirectory selinux context mainline usecase / usable by * / fs_bpf no [*] core operating system (ie. platform) * /loader fs_bpf_loader no, U+ (as yet unused) * /net_private fs_bpf_net_private yes, T+ network_stack * /net_shared fs_bpf_net_shared yes, T+ network_stack & system_server * /netd_readonly fs_bpf_netd_readonly yes, T+ network_stack & system_server & r/o to netd * /netd_shared fs_bpf_netd_shared yes, T+ network_stack & system_server & netd [**] * /tethering fs_bpf_tethering yes, S+ network_stack * /vendor fs_bpf_vendor no, T+ vendor * * [*] initial support for bpf was added back in P, * but things worked differently back then with no bpfloader, * and instead netd doing stuff by hand, * bpfloader with pinning into /sys/fs/bpf was (I believe) added in Q * (and was definitely there in R). * * [**] additionally bpf programs are accessible to netutils_wrapper * for use by iptables xt_bpf extensions. * * See cs/p:aosp-master%20-file:prebuilts/%20file:genfs_contexts%20"genfscon%20bpf" */ /* generic functions */ /* * Type-unsafe bpf map functions - avoid if possible. * * Using these it is possible to pass in keys/values of the wrong type/size, * or, for 'bpf_map_lookup_elem_unsafe' receive into a pointer to the wrong type. * You will not get a compile time failure, and for certain types of errors you * might not even get a failure from the kernel's ebpf verifier during program load, * instead stuff might just not work right at runtime. * * Instead please use: * DEFINE_BPF_MAP(foo_map, TYPE, KeyType, ValueType, num_entries) * where TYPE can be something like HASH or ARRAY, and num_entries is an integer. * * This defines the map (hence this should not be used in a header file included * from multiple locations) and provides type safe accessors: * ValueType * bpf_foo_map_lookup_elem(const KeyType *) * int bpf_foo_map_update_elem(const KeyType *, const ValueType *, flags) * int bpf_foo_map_delete_elem(const KeyType *) * * This will make sure that if you change the type of a map you'll get compile * errors at any spots you forget to update with the new type. * * Note: these all take pointers to const map because from the C/eBPF point of view * the map struct is really just a readonly map definition of the in kernel object. * Runtime modification of the map defining struct is meaningless, since * the contents is only ever used during bpf program loading & map creation * by the bpf loader, and not by the eBPF program itself. */ static void* (*bpf_map_lookup_elem_unsafe)(const struct bpf_map_def* map, const void* key) = (void*)BPF_FUNC_map_lookup_elem; static int (*bpf_map_update_elem_unsafe)(const struct bpf_map_def* map, const void* key, const void* value, unsigned long long flags) = (void*) BPF_FUNC_map_update_elem; static int (*bpf_map_delete_elem_unsafe)(const struct bpf_map_def* map, const void* key) = (void*)BPF_FUNC_map_delete_elem; static int (*bpf_ringbuf_output_unsafe)(const struct bpf_map_def* ringbuf, const void* data, __u64 size, __u64 flags) = (void*) BPF_FUNC_ringbuf_output; static void* (*bpf_ringbuf_reserve_unsafe)(const struct bpf_map_def* ringbuf, __u64 size, __u64 flags) = (void*) BPF_FUNC_ringbuf_reserve; static void (*bpf_ringbuf_submit_unsafe)(const void* data, __u64 flags) = (void*) BPF_FUNC_ringbuf_submit; #define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val) \ struct ____btf_map_##name { \ type_key key; \ type_val value; \ }; \ struct ____btf_map_##name \ __attribute__ ((section(".maps." #name), used)) \ ____btf_map_##name = { } #define BPF_ASSERT_LOADER_VERSION(min_loader, ignore_eng, ignore_user, ignore_userdebug) \ _Static_assert( \ (min_loader) >= BPFLOADER_IGNORED_ON_VERSION || \ !((ignore_eng).ignore_on_eng || \ (ignore_user).ignore_on_user || \ (ignore_userdebug).ignore_on_userdebug), \ "bpfloader min version must be >= 0.33 in order to use ignored_on"); #define DEFINE_BPF_MAP_BASE(the_map, TYPE, keysize, valuesize, num_entries, \ usr, grp, md, selinux, pindir, share, minkver, \ maxkver, minloader, maxloader, ignore_eng, \ ignore_user, ignore_userdebug) \ const struct bpf_map_def SECTION("maps") the_map = { \ .type = BPF_MAP_TYPE_##TYPE, \ .key_size = (keysize), \ .value_size = (valuesize), \ .max_entries = (num_entries), \ .map_flags = 0, \ .uid = (usr), \ .gid = (grp), \ .mode = (md), \ .bpfloader_min_ver = (minloader), \ .bpfloader_max_ver = (maxloader), \ .min_kver = (minkver).kver, \ .max_kver = (maxkver).kver, \ .selinux_context = (selinux), \ .pin_subdir = (pindir), \ .shared = (share).shared, \ .ignore_on_eng = (ignore_eng).ignore_on_eng, \ .ignore_on_user = (ignore_user).ignore_on_user, \ .ignore_on_userdebug = (ignore_userdebug).ignore_on_userdebug, \ }; \ BPF_ASSERT_LOADER_VERSION(minloader, ignore_eng, ignore_user, ignore_userdebug); // Type safe macro to declare a ring buffer and related output functions. // Compatibility: // * BPF ring buffers are only available kernels 5.8 and above. Any program // accessing the ring buffer should set a program level min_kver >= 5.8. // * The definition below sets a map min_kver of 5.8 which requires targeting // a BPFLOADER_MIN_VER >= BPFLOADER_S_VERSION. #define DEFINE_BPF_RINGBUF_EXT(the_map, ValueType, size_bytes, usr, grp, md, \ selinux, pindir, share, min_loader, max_loader, \ ignore_eng, ignore_user, ignore_userdebug) \ DEFINE_BPF_MAP_BASE(the_map, RINGBUF, 0, 0, size_bytes, usr, grp, md, \ selinux, pindir, share, KVER_5_8, KVER_INF, \ min_loader, max_loader, ignore_eng, ignore_user, \ ignore_userdebug); \ \ _Static_assert((size_bytes) >= 4096, "min 4 kiB ringbuffer size"); \ _Static_assert((size_bytes) <= 0x10000000, "max 256 MiB ringbuffer size"); \ _Static_assert(((size_bytes) & ((size_bytes) - 1)) == 0, \ "ring buffer size must be a power of two"); \ \ static inline __always_inline __unused int bpf_##the_map##_output( \ const ValueType* v) { \ return bpf_ringbuf_output_unsafe(&the_map, v, sizeof(*v), 0); \ } \ \ static inline __always_inline __unused \ ValueType* bpf_##the_map##_reserve() { \ return bpf_ringbuf_reserve_unsafe(&the_map, sizeof(ValueType), 0); \ } \ \ static inline __always_inline __unused void bpf_##the_map##_submit( \ const ValueType* v) { \ bpf_ringbuf_submit_unsafe(v, 0); \ } #define DEFINE_BPF_RINGBUF(the_map, ValueType, size_bytes, usr, grp, md) \ DEFINE_BPF_RINGBUF_EXT(the_map, ValueType, size_bytes, usr, grp, md, \ DEFAULT_BPF_MAP_SELINUX_CONTEXT, DEFAULT_BPF_MAP_PIN_SUBDIR, \ PRIVATE, BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, \ LOAD_ON_ENG, LOAD_ON_USER, LOAD_ON_USERDEBUG) /* There exist buggy kernels with pre-T OS, that due to * kernel patch "[ALPS05162612] bpf: fix ubsan error" * do not support userspace writes into non-zero index of bpf map arrays. * * We use this assert to prevent us from being able to define such a map. */ #ifdef THIS_BPF_PROGRAM_IS_FOR_TEST_PURPOSES_ONLY #define BPF_MAP_ASSERT_OK(type, entries, mode) #elif BPFLOADER_MIN_VER >= BPFLOADER_T_VERSION #define BPF_MAP_ASSERT_OK(type, entries, mode) #else #define BPF_MAP_ASSERT_OK(type, entries, mode) \ _Static_assert(((type) != BPF_MAP_TYPE_ARRAY) || ((entries) <= 1) || !((mode) & 0222), \ "Writable arrays with more than 1 element not supported on pre-T devices.") #endif /* type safe macro to declare a map and related accessor functions */ #define DEFINE_BPF_MAP_EXT(the_map, TYPE, KeyType, ValueType, num_entries, usr, grp, md, \ selinux, pindir, share, min_loader, max_loader, ignore_eng, \ ignore_user, ignore_userdebug) \ DEFINE_BPF_MAP_BASE(the_map, TYPE, sizeof(KeyType), sizeof(ValueType), \ num_entries, usr, grp, md, selinux, pindir, share, \ KVER_NONE, KVER_INF, min_loader, max_loader, \ ignore_eng, ignore_user, ignore_userdebug); \ BPF_MAP_ASSERT_OK(BPF_MAP_TYPE_##TYPE, (num_entries), (md)); \ _Static_assert(sizeof(KeyType) < 1024, "aosp/2370288 requires < 1024 byte keys"); \ _Static_assert(sizeof(ValueType) < 65536, "aosp/2370288 requires < 65536 byte values"); \ BPF_ANNOTATE_KV_PAIR(the_map, KeyType, ValueType); \ \ static inline __always_inline __unused ValueType* bpf_##the_map##_lookup_elem( \ const KeyType* k) { \ return bpf_map_lookup_elem_unsafe(&the_map, k); \ }; \ \ static inline __always_inline __unused int bpf_##the_map##_update_elem( \ const KeyType* k, const ValueType* v, unsigned long long flags) { \ return bpf_map_update_elem_unsafe(&the_map, k, v, flags); \ }; \ \ static inline __always_inline __unused int bpf_##the_map##_delete_elem(const KeyType* k) { \ return bpf_map_delete_elem_unsafe(&the_map, k); \ }; #ifndef DEFAULT_BPF_MAP_SELINUX_CONTEXT #define DEFAULT_BPF_MAP_SELINUX_CONTEXT "" #endif #ifndef DEFAULT_BPF_MAP_PIN_SUBDIR #define DEFAULT_BPF_MAP_PIN_SUBDIR "" #endif #ifndef DEFAULT_BPF_MAP_UID #define DEFAULT_BPF_MAP_UID AID_ROOT #elif BPFLOADER_MIN_VER < 28u #error "Bpf Map UID must be left at default of AID_ROOT for BpfLoader prior to v0.28" #endif // for maps not meant to be accessed from userspace #define DEFINE_BPF_MAP_KERNEL_INTERNAL(the_map, TYPE, KeyType, ValueType, num_entries) \ DEFINE_BPF_MAP_EXT(the_map, TYPE, KeyType, ValueType, num_entries, AID_ROOT, AID_ROOT, \ 0000, "fs_bpf_loader", "", PRIVATE, BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, \ LOAD_ON_ENG, LOAD_ON_USER, LOAD_ON_USERDEBUG) #define DEFINE_BPF_MAP_UGM(the_map, TYPE, KeyType, ValueType, num_entries, usr, grp, md) \ DEFINE_BPF_MAP_EXT(the_map, TYPE, KeyType, ValueType, num_entries, usr, grp, md, \ DEFAULT_BPF_MAP_SELINUX_CONTEXT, DEFAULT_BPF_MAP_PIN_SUBDIR, \ PRIVATE, BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, \ LOAD_ON_ENG, LOAD_ON_USER, LOAD_ON_USERDEBUG) #define DEFINE_BPF_MAP(the_map, TYPE, KeyType, ValueType, num_entries) \ DEFINE_BPF_MAP_UGM(the_map, TYPE, KeyType, ValueType, num_entries, \ DEFAULT_BPF_MAP_UID, AID_ROOT, 0600) #define DEFINE_BPF_MAP_RO(the_map, TYPE, KeyType, ValueType, num_entries, gid) \ DEFINE_BPF_MAP_UGM(the_map, TYPE, KeyType, ValueType, num_entries, \ DEFAULT_BPF_MAP_UID, gid, 0440) #define DEFINE_BPF_MAP_GWO(the_map, TYPE, KeyType, ValueType, num_entries, gid) \ DEFINE_BPF_MAP_UGM(the_map, TYPE, KeyType, ValueType, num_entries, \ DEFAULT_BPF_MAP_UID, gid, 0620) #define DEFINE_BPF_MAP_GRO(the_map, TYPE, KeyType, ValueType, num_entries, gid) \ DEFINE_BPF_MAP_UGM(the_map, TYPE, KeyType, ValueType, num_entries, \ DEFAULT_BPF_MAP_UID, gid, 0640) #define DEFINE_BPF_MAP_GRW(the_map, TYPE, KeyType, ValueType, num_entries, gid) \ DEFINE_BPF_MAP_UGM(the_map, TYPE, KeyType, ValueType, num_entries, \ DEFAULT_BPF_MAP_UID, gid, 0660) // LLVM eBPF builtins: they directly generate BPF_LD_ABS/BPF_LD_IND (skb may be ignored?) unsigned long long load_byte(void* skb, unsigned long long off) asm("llvm.bpf.load.byte"); unsigned long long load_half(void* skb, unsigned long long off) asm("llvm.bpf.load.half"); unsigned long long load_word(void* skb, unsigned long long off) asm("llvm.bpf.load.word"); static int (*bpf_probe_read)(void* dst, int size, void* unsafe_ptr) = (void*) BPF_FUNC_probe_read; static int (*bpf_probe_read_str)(void* dst, int size, void* unsafe_ptr) = (void*) BPF_FUNC_probe_read_str; static int (*bpf_probe_read_user)(void* dst, int size, const void* unsafe_ptr) = (void*)BPF_FUNC_probe_read_user; static int (*bpf_probe_read_user_str)(void* dst, int size, const void* unsafe_ptr) = (void*) BPF_FUNC_probe_read_user_str; static unsigned long long (*bpf_ktime_get_ns)(void) = (void*) BPF_FUNC_ktime_get_ns; static unsigned long long (*bpf_ktime_get_boot_ns)(void) = (void*)BPF_FUNC_ktime_get_boot_ns; static unsigned long long (*bpf_get_current_pid_tgid)(void) = (void*) BPF_FUNC_get_current_pid_tgid; static unsigned long long (*bpf_get_current_uid_gid)(void) = (void*) BPF_FUNC_get_current_uid_gid; static unsigned long long (*bpf_get_smp_processor_id)(void) = (void*) BPF_FUNC_get_smp_processor_id; static long (*bpf_get_stackid)(void* ctx, void* map, uint64_t flags) = (void*) BPF_FUNC_get_stackid; static long (*bpf_get_current_comm)(void* buf, uint32_t buf_size) = (void*) BPF_FUNC_get_current_comm; // bpf_sk_fullsock requires 5.1+ kernel static struct bpf_sock* (*bpf_sk_fullsock)(struct bpf_sock* sk) = (void*) BPF_FUNC_sk_fullsock; // GPL only: static int (*bpf_trace_printk)(const char* fmt, int fmt_size, ...) = (void*) BPF_FUNC_trace_printk; #define bpf_printf(s, n...) bpf_trace_printk(s, sizeof(s), ## n) // Note: bpf only supports up to 3 arguments, log via: bpf_printf("msg %d %d %d", 1, 2, 3); // and read via the blocking: sudo cat /sys/kernel/debug/tracing/trace_pipe #define DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, max_kv, \ min_loader, max_loader, opt, selinux, pindir, ignore_eng, \ ignore_user, ignore_userdebug) \ const struct bpf_prog_def SECTION("progs") the_prog##_def = { \ .uid = (prog_uid), \ .gid = (prog_gid), \ .min_kver = (min_kv).kver, \ .max_kver = (max_kv).kver, \ .optional = (opt).optional, \ .bpfloader_min_ver = (min_loader), \ .bpfloader_max_ver = (max_loader), \ .selinux_context = (selinux), \ .pin_subdir = (pindir), \ .ignore_on_eng = (ignore_eng).ignore_on_eng, \ .ignore_on_user = (ignore_user).ignore_on_user, \ .ignore_on_userdebug = (ignore_userdebug).ignore_on_userdebug, \ }; \ SECTION(SECTION_NAME) \ int the_prog #define DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, max_kv, \ opt) \ DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, max_kv, \ BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, opt, "", "", \ LOAD_ON_ENG, LOAD_ON_USER, LOAD_ON_USERDEBUG) // Programs (here used in the sense of functions/sections) marked optional are allowed to fail // to load (for example due to missing kernel patches). // The bpfloader will just ignore these failures and continue processing the next section. // // A non-optional program (function/section) failing to load causes a failure and aborts // processing of the entire .o, if the .o is additionally marked critical, this will result // in the entire bpfloader process terminating with a failure and not setting the bpf.progs_loaded // system property. This in turn results in waitForProgsLoaded() never finishing. // // ie. a non-optional program in a critical .o is mandatory for kernels matching the min/max kver. // programs requiring a kernel version >= min_kv && < max_kv #define DEFINE_BPF_PROG_KVER_RANGE(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, max_kv) \ DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, max_kv, \ MANDATORY) #define DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, \ max_kv) \ DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, max_kv, \ OPTIONAL) // programs requiring a kernel version >= min_kv #define DEFINE_BPF_PROG_KVER(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv) \ DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, KVER_INF, \ MANDATORY) #define DEFINE_OPTIONAL_BPF_PROG_KVER(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv) \ DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, KVER_INF, \ OPTIONAL) // programs with no kernel version requirements #define DEFINE_BPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog) \ DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, KVER_NONE, KVER_INF, \ MANDATORY) #define DEFINE_OPTIONAL_BPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog) \ DEFINE_BPF_PROG_KVER_RANGE_OPT(SECTION_NAME, prog_uid, prog_gid, the_prog, KVER_NONE, KVER_INF, \ OPTIONAL)