Daniel Borkmann c210129760
bpf: align and clean bpf_{map,prog}_get helpers ...
Add a bpf_map_get() function that we're going to use later on and
align/clean the remaining helpers a bit so that we have them a bit
more consistent:
- __bpf_map_get() and __bpf_prog_get() that both work on the fd
struct, check whether the descriptor is eBPF and return the
pointer to the map/prog stored in the private data.
Also, we can return f.file->private_data directly, the function
signature is enough of a documentation already.
- bpf_map_get() and bpf_prog_get() that both work on u32 user fd,
call their respective __bpf_map_get()/__bpf_prog_get() variants,
and take a reference.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net >
Acked-by: Alexei Starovoitov <ast@kernel.org >
Signed-off-by: David S. Miller <davem@davemloft.net >
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c210129760