system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-09 04:43:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

bpf: Mark struct bpf_cpumask as rcu protected

Browse source 
struct bpf_cpumask is a BPF-wrapper around the struct cpumask type which
can be instantiated by a BPF program, and then queried as a cpumask in
similar fashion to normal kernel code. The previous patch in this series
makes the type fully RCU safe, so the type can be included in the
rcu_protected_type BTF ID list.

A subsequent patch will remove bpf_cpumask_kptr_get(), as it's no longer
useful now that we can just treat the type as RCU safe by default and do
our own if check.

Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230316054028.88924-3-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
David Vernet 2023-03-16 00:40:25 -05:00 committed by Alexei Starovoitov
parent 77473d1a96
commit 63d2d83d21
1 changed files with 1 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
kernel/bpf/verifier.c
View file

@ -4599,6 +4599,7 @@ static bool in_rcu_cs(struct bpf_verifier_env *env)
BTF_SET_START(rcu_protected_types)
BTF_ID(struct, prog_test_ref_kfunc)
BTF_ID(struct, cgroup)
BTF_ID(struct, bpf_cpumask)
BTF_SET_END(rcu_protected_types)
static bool rcu_protected_object(const struct btf *btf, u32 btf_id)