mirror/libbpf
1
0
Fork 0
mirror of https://github.com/netdata/libbpf.git synced 2026-04-04 23:59:07 +08:00
Code Issues Packages Projects Releases Wiki Activity

bpf: Add bpf_sys_close() helper.

Browse Source 
Add bpf_sys_close() helper to be used by the syscall/loader program to close
intermediate FDs and other cleanup.
Note this helper must never be allowed inside fdget/fdput bracketing.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210514003623.28033-11-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov
2021-05-13 17:36:12 -07:00
committed by Andrii Nakryiko
parent 6eac86910c
commit c1f36fb3e3
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
include/uapi/linux/bpf.h
View File

@@ -4754,6 +4754,12 @@ union bpf_attr {
* Find BTF type with given name and kind in vmlinux BTF or in module's BTFs. * Find BTF type with given name and kind in vmlinux BTF or in module's BTFs.
* Return * Return
* Returns btf_id and btf_obj_fd in lower and upper 32 bits. * Returns btf_id and btf_obj_fd in lower and upper 32 bits.
*
* long bpf_sys_close(u32 fd)
* Description
* Execute close syscall for given FD.
* Return
* A syscall result.
*/ */
#define __BPF_FUNC_MAPPER(FN) \ #define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \ FN(unspec), \
@@ -4924,6 +4930,7 @@ union bpf_attr {
FN(snprintf), \ FN(snprintf), \
FN(sys_bpf), \ FN(sys_bpf), \
FN(btf_find_by_name_kind), \ FN(btf_find_by_name_kind), \
FN(sys_close), \
/* */ /* */
/* integer value in 'imm' field of BPF_CALL instruction selects which helper /* integer value in 'imm' field of BPF_CALL instruction selects which helper