diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-03-01 12:31:43 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-01 14:05:19 -0500 |
| commit | f1a66f85b74c5ef7b503f746ea97742dacd56419 (patch) | |
| tree | 74e50377321d7afae02ebf494ee523cb878d285a /include/linux | |
| parent | a2c83fff582ae133d9f5bb187404ea9ce4da1f96 (diff) | |
ebpf: export BPF_PSEUDO_MAP_FD to uapi
We need to export BPF_PSEUDO_MAP_FD to user space, as it's used in the
ELF BPF loader where instructions are being loaded that need map fixups.
An initial stage loads all maps into the kernel, and later on replaces
related instructions in the eBPF blob with BPF_PSEUDO_MAP_FD as source
register and the actual fd as immediate value.
The kernel verifier recognizes this keyword and replaces the map fd with
a real pointer internally.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/filter.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index caac2087a4d5..5e3863d5f666 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -145,8 +145,6 @@ struct bpf_prog_aux; .off = 0, \ .imm = ((__u64) (IMM)) >> 32 }) -#define BPF_PSEUDO_MAP_FD 1 - /* pseudo BPF_LD_IMM64 insn used to refer to process-local map_fd */ #define BPF_LD_MAP_FD(DST, MAP_FD) \ BPF_LD_IMM64_RAW(DST, BPF_PSEUDO_MAP_FD, MAP_FD) |