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| author | Stanislav Fomichev <sdf@google.com> | 2019-10-15 11:31:24 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-10-15 16:24:26 -0700 |
| commit | ba94094818a811758570990648160a6ba2ca05cb (patch) | |
| tree | 3617cb0fba9170b15e8f3f2c0ad7bfae8c28f5ce /net/bpf | |
| parent | da927466a152a9497c05926a95c6aebba6d3ad5b (diff) | |
| download | linux-ba94094818a811758570990648160a6ba2ca05cb.tar.gz linux-ba94094818a811758570990648160a6ba2ca05cb.tar.bz2 linux-ba94094818a811758570990648160a6ba2ca05cb.zip | |
bpf: Allow __sk_buff tstamp in BPF_PROG_TEST_RUN
It's useful for implementing EDT related tests (set tstamp, run the
test, see how the tstamp is changed or observe some other parameter).
Note that bpf_ktime_get_ns() helper is using monotonic clock, so for
the BPF programs that compare tstamp against it, tstamp should be
derived from clock_gettime(CLOCK_MONOTONIC, ...).
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20191015183125.124413-1-sdf@google.com
Diffstat (limited to 'net/bpf')
| -rw-r--r-- | net/bpf/test_run.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 1153bbcdff72..0be4497cb832 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -218,10 +218,18 @@ static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb) if (!range_is_zero(__skb, offsetof(struct __sk_buff, cb) + FIELD_SIZEOF(struct __sk_buff, cb), + offsetof(struct __sk_buff, tstamp))) + return -EINVAL; + + /* tstamp is allowed */ + + if (!range_is_zero(__skb, offsetof(struct __sk_buff, tstamp) + + FIELD_SIZEOF(struct __sk_buff, tstamp), sizeof(struct __sk_buff))) return -EINVAL; skb->priority = __skb->priority; + skb->tstamp = __skb->tstamp; memcpy(&cb->data, __skb->cb, QDISC_CB_PRIV_LEN); return 0; @@ -235,6 +243,7 @@ static void convert_skb_to___skb(struct sk_buff *skb, struct __sk_buff *__skb) return; __skb->priority = skb->priority; + __skb->tstamp = skb->tstamp; memcpy(__skb->cb, &cb->data, QDISC_CB_PRIV_LEN); } |