kernel-ark/kernel/bpf
Daniel Borkmann 113214be7f bpf: refactor bpf_prog_get and type check into helper
Since bpf_prog_get() and program type check is used in a couple of places,
refactor this into a small helper function that we can make use of. Since
the non RO prog->aux part is not used in performance critical paths and a
program destruction via RCU is rather very unlikley when doing the put, we
shouldn't have an issue just doing the bpf_prog_get() + prog->type != type
check, but actually not taking the ref at all (due to being in fdget() /
fdput() section of the bpf fd) is even cleaner and makes the diff smaller
as well, so just go for that. Callsites are changed to make use of the new
helper where possible.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-01 16:00:47 -04:00
..
arraymap.c bpf: generally move prog destruction to RCU deferral 2016-07-01 16:00:47 -04:00
core.c bpf: minor cleanups on fd maps and helpers 2016-06-30 05:54:40 -04:00
hashtab.c bpf: pre-allocate hash map elements 2016-03-08 15:28:31 -05:00
helpers.c bpf: don't use raw processor id in generic helper 2016-06-30 05:54:40 -04:00
inode.c bpf, inode: disallow userns mounts 2016-05-23 15:08:26 -07:00
Makefile bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
percpu_freelist.c bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
percpu_freelist.h bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
stackmap.c Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-05-25 17:05:40 -07:00
syscall.c bpf: refactor bpf_prog_get and type check into helper 2016-07-01 16:00:47 -04:00
verifier.c bpf: fix matching of data/data_end in verifier 2016-06-15 23:37:54 -07:00