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| author | Amery Hung <ameryhung@gmail.com> | 2025-02-17 11:06:36 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-02-17 18:47:27 -0800 |
| commit | 432051806f614ca512da401b80257b95b2a2241e (patch) | |
| tree | f9ea2bd9847d99bdb29faf2d206193e5ad4cd84d /kernel/bpf/bpf_struct_ops.c | |
| parent | 4eb93fea59199c1aa6a6f837e90bdd597804cdcc (diff) | |
bpf: Make every prog keep a copy of ctx_arg_info
Currently, ctx_arg_info is read-only in the view of the verifier since
it is shared among programs of the same attach type. Make each program
have their own copy of ctx_arg_info so that we can use it to store
program specific information.
In the next patch where we support acquiring a referenced kptr through a
struct_ops argument tagged with "__ref", ctx_arg_info->ref_obj_id will
be used to store the unique reference object id of the argument. This
avoids creating a requirement in the verifier that "__ref" tagged
arguments must be the first set of references acquired [0].
[0] https://lore.kernel.org/bpf/20241220195619.2022866-2-amery.hung@gmail.com/
Signed-off-by: Amery Hung <ameryhung@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20250217190640.1748177-2-ameryhung@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/bpf_struct_ops.c')
0 files changed, 0 insertions, 0 deletions