diff options
| author |   Lorenz Bauer <lmb@cloudflare.com> | 2020-09-21 13:12:27 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-09-21 15:00:41 -0700 |
| commit | f79e7ea571732a6e16f15c6e2f000c347e2d7431 (patch) | |
| tree | 7ea295685ddd54b775cdc688bcfe0b5f577e48f6 /include/linux/bpf.h | |
| parent | bpf: Hoist type checking for nullable arg types (diff) | |
| download | linux-dev-f79e7ea571732a6e16f15c6e2f000c347e2d7431.tar.xz linux-dev-f79e7ea571732a6e16f15c6e2f000c347e2d7431.zip | |
bpf: Use a table to drive helper arg type checks
The mapping between bpf_arg_type and bpf_reg_type is encoded in a big
hairy if statement that is hard to follow. The debug output also leaves
to be desired: if a reg_type doesn't match we only print one of the
options, instead printing all the valid ones.
Convert the if statement into a table which is then used to drive type
checking. If none of the reg_types match we print all options, e.g.:
R2 type=rdonly_buf expected=fp, pkt, pkt_meta, map_value
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200921121227.255763-12-lmb@cloudflare.com
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 87b0d5dcc1ff..fc5c901c7542 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -292,6 +292,7 @@ enum bpf_arg_type { ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */ ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */ ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ + __BPF_ARG_TYPE_MAX, }; /* type of values returned from helper functions */ |