xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bpf/verifier: add ARG_PTR_TO_UNINIT_MAP_VALUE

Browse Source 
ARG_PTR_TO_UNINIT_MAP_VALUE argument is a pointer to a memory zone
used to save the value of a map.  Basically the same as
ARG_PTR_TO_UNINIT_MEM, but the size has not be passed as an extra
argument.

This will be used in the following patch that implements some new
helpers that receive a pointer to be filled with a map value.

Signed-off-by: Mauricio Vasquez B <mauricio.vasquez@polito.it>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Mauricio Vasquez B
2018-10-18 15:16:20 +02:00
committed by Alexei Starovoitov
parent c9d29f4658
commit 2ea864c58f
2 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/bpf.h
View File

@@ -138,6 +138,7 @@ enum bpf_arg_type {
ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
/* the following constraints used to prototype bpf_memcmp() and other
* functions that access data on eBPF program stack