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bpf: centre subprog information fields

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It is better to centre all subprog information fields into one structure.
This structure could later serve as function node in call graph.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jiong Wang
2018-05-02 16:17:18 -04:00
committed by Daniel Borkmann
parent f910cefa32
commit 9c8105bd44
2 changed files with 38 additions and 33 deletions
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9
include/linux/bpf_verifier.h
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@@ -173,6 +173,11 @@ static inline bool bpf_verifier_log_needed(const struct bpf_verifier_log *log)
#define BPF_MAX_SUBPROGS 256
struct bpf_subprog_info {
u32 start; /* insn idx of function entry point */
u16 stack_depth; /* max. stack depth used by this function */
};
/* single container for all structs
* one verifier_env per bpf_check() call
*/
@@ -191,9 +196,7 @@ struct bpf_verifier_env {
bool seen_direct_write;
struct bpf_insn_aux_data *insn_aux_data; /* array of per-insn state */
struct bpf_verifier_log log;
u32 subprog_starts[BPF_MAX_SUBPROGS + 1];
/* computes the stack depth of each bpf function */
u16 subprog_stack_depth[BPF_MAX_SUBPROGS + 1];
struct bpf_subprog_info subprog_info[BPF_MAX_SUBPROGS + 1];
u32 subprog_cnt;
};