diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/strobemeta.h')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/strobemeta.h | 109 |
1 files changed, 96 insertions, 13 deletions
diff --git a/tools/testing/selftests/bpf/progs/strobemeta.h b/tools/testing/selftests/bpf/progs/strobemeta.h index ad61b722a9de..753718595c26 100644 --- a/tools/testing/selftests/bpf/progs/strobemeta.h +++ b/tools/testing/selftests/bpf/progs/strobemeta.h @@ -266,8 +266,12 @@ struct tls_index { uint64_t offset; }; -static __always_inline void *calc_location(struct strobe_value_loc *loc, - void *tls_base) +#ifdef SUBPROGS +__noinline +#else +__always_inline +#endif +static void *calc_location(struct strobe_value_loc *loc, void *tls_base) { /* * tls_mode value is: @@ -327,10 +331,15 @@ static __always_inline void *calc_location(struct strobe_value_loc *loc, : NULL; } -static __always_inline void read_int_var(struct strobemeta_cfg *cfg, - size_t idx, void *tls_base, - struct strobe_value_generic *value, - struct strobemeta_payload *data) +#ifdef SUBPROGS +__noinline +#else +__always_inline +#endif +static void read_int_var(struct strobemeta_cfg *cfg, + size_t idx, void *tls_base, + struct strobe_value_generic *value, + struct strobemeta_payload *data) { void *location = calc_location(&cfg->int_locs[idx], tls_base); if (!location) @@ -349,7 +358,7 @@ static __always_inline uint64_t read_str_var(struct strobemeta_cfg *cfg, void *payload) { void *location; - uint32_t len; + uint64_t len; data->str_lens[idx] = 0; location = calc_location(&cfg->str_locs[idx], tls_base); @@ -381,7 +390,7 @@ static __always_inline void *read_map_var(struct strobemeta_cfg *cfg, struct strobe_map_descr* descr = &data->map_descrs[idx]; struct strobe_map_raw map; void *location; - uint32_t len; + uint64_t len; int i; descr->tag_len = 0; /* presume no tag is set */ @@ -436,12 +445,59 @@ static __always_inline void *read_map_var(struct strobemeta_cfg *cfg, return payload; } +#ifdef USE_BPF_LOOP +enum read_type { + READ_INT_VAR, + READ_MAP_VAR, + READ_STR_VAR, +}; + +struct read_var_ctx { + struct strobemeta_payload *data; + void *tls_base; + struct strobemeta_cfg *cfg; + void *payload; + /* value gets mutated */ + struct strobe_value_generic *value; + enum read_type type; +}; + +static int read_var_callback(__u32 index, struct read_var_ctx *ctx) +{ + switch (ctx->type) { + case READ_INT_VAR: + if (index >= STROBE_MAX_INTS) + return 1; + read_int_var(ctx->cfg, index, ctx->tls_base, ctx->value, ctx->data); + break; + case READ_MAP_VAR: + if (index >= STROBE_MAX_MAPS) + return 1; + ctx->payload = read_map_var(ctx->cfg, index, ctx->tls_base, + ctx->value, ctx->data, ctx->payload); + break; + case READ_STR_VAR: + if (index >= STROBE_MAX_STRS) + return 1; + ctx->payload += read_str_var(ctx->cfg, index, ctx->tls_base, + ctx->value, ctx->data, ctx->payload); + break; + } + return 0; +} +#endif /* USE_BPF_LOOP */ + /* * read_strobe_meta returns NULL, if no metadata was read; otherwise returns * pointer to *right after* payload ends */ -static __always_inline void *read_strobe_meta(struct task_struct *task, - struct strobemeta_payload *data) +#ifdef SUBPROGS +__noinline +#else +__always_inline +#endif +static void *read_strobe_meta(struct task_struct *task, + struct strobemeta_payload *data) { pid_t pid = bpf_get_current_pid_tgid() >> 32; struct strobe_value_generic value = {0}; @@ -461,11 +517,36 @@ static __always_inline void *read_strobe_meta(struct task_struct *task, */ tls_base = (void *)task; +#ifdef USE_BPF_LOOP + struct read_var_ctx ctx = { + .cfg = cfg, + .tls_base = tls_base, + .value = &value, + .data = data, + .payload = payload, + }; + int err; + + ctx.type = READ_INT_VAR; + err = bpf_loop(STROBE_MAX_INTS, read_var_callback, &ctx, 0); + if (err != STROBE_MAX_INTS) + return NULL; + + ctx.type = READ_STR_VAR; + err = bpf_loop(STROBE_MAX_STRS, read_var_callback, &ctx, 0); + if (err != STROBE_MAX_STRS) + return NULL; + + ctx.type = READ_MAP_VAR; + err = bpf_loop(STROBE_MAX_MAPS, read_var_callback, &ctx, 0); + if (err != STROBE_MAX_MAPS) + return NULL; +#else #ifdef NO_UNROLL #pragma clang loop unroll(disable) #else #pragma unroll -#endif +#endif /* NO_UNROLL */ for (int i = 0; i < STROBE_MAX_INTS; ++i) { read_int_var(cfg, i, tls_base, &value, data); } @@ -473,7 +554,7 @@ static __always_inline void *read_strobe_meta(struct task_struct *task, #pragma clang loop unroll(disable) #else #pragma unroll -#endif +#endif /* NO_UNROLL */ for (int i = 0; i < STROBE_MAX_STRS; ++i) { payload += read_str_var(cfg, i, tls_base, &value, data, payload); } @@ -481,10 +562,12 @@ static __always_inline void *read_strobe_meta(struct task_struct *task, #pragma clang loop unroll(disable) #else #pragma unroll -#endif +#endif /* NO_UNROLL */ for (int i = 0; i < STROBE_MAX_MAPS; ++i) { payload = read_map_var(cfg, i, tls_base, &value, data, payload); } +#endif /* USE_BPF_LOOP */ + /* * return pointer right after end of payload, so it's possible to * calculate exact amount of useful data that needs to be sent |