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| author | Daniel Borkmann <daniel@iogearbox.net> | 2016-06-30 17:24:44 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-01 16:00:47 -0400 |
| commit | 113214be7f6c98dd6d0435e4765aea8dea91662c (patch) | |
| tree | 31d2c41c7af6991401c3aff11e7ade3317b4a614 /net/sched/cls_bpf.c | |
| parent | 1aacde3d22c42281236155c1ef6d7a5aa32a826b (diff) | |
| download | linux-stable-113214be7f6c98dd6d0435e4765aea8dea91662c.tar.gz linux-stable-113214be7f6c98dd6d0435e4765aea8dea91662c.tar.bz2 linux-stable-113214be7f6c98dd6d0435e4765aea8dea91662c.zip | |
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>
Diffstat (limited to 'net/sched/cls_bpf.c')
| -rw-r--r-- | net/sched/cls_bpf.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c index 7b342c779da7..c3002c2c68bb 100644 --- a/net/sched/cls_bpf.c +++ b/net/sched/cls_bpf.c @@ -272,15 +272,10 @@ static int cls_bpf_prog_from_efd(struct nlattr **tb, struct cls_bpf_prog *prog, bpf_fd = nla_get_u32(tb[TCA_BPF_FD]); - fp = bpf_prog_get(bpf_fd); + fp = bpf_prog_get_type(bpf_fd, BPF_PROG_TYPE_SCHED_CLS); if (IS_ERR(fp)) return PTR_ERR(fp); - if (fp->type != BPF_PROG_TYPE_SCHED_CLS) { - bpf_prog_put(fp); - return -EINVAL; - } - if (tb[TCA_BPF_NAME]) { name = kmemdup(nla_data(tb[TCA_BPF_NAME]), nla_len(tb[TCA_BPF_NAME]), |