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authorDaniel Borkmann <dborkman@redhat.com>2013-06-15 16:06:00 +0200
committerDaniel Borkmann <dborkman@redhat.com>2013-06-15 16:06:35 +0200
commit3f183062473e6c3eef126a33d8b75416f71b9aa8 (patch)
treea1a053ef810f36d85f0f838ada11393390bb7315 /str.c
parent1f229a105e82ce5327035f9ff04f2e55001ed2f8 (diff)
bpf: add missing decode for poff
When we decode BPF extensions, add the missing opcode for poff. While at it, also remove the '#' prefix, since it's optional in bpfc. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-10-04 18:37:07 +0000
ted then that means there is effectively a "bubble" of silence in the pipe now, and this silence will be reflected in a lower bandwidth sample for any rate samples from now until we get an ACK indicating this bubble has exited the pipe: specifically, until we get an ACK for the next packet we transmit. When we send every skb we record in scb->tx.is_app_limited whether the resulting rate sample will be application-limited. The code in tcp_rate_gen() checks to see when it is safe to mark all known application-limited bubbles of silence as having exited the pipe. It does this by checking to see when the delivered count moves past the tp->app_limited marker. At this point it zeroes the tp->app_limited marker, as all known bubbles are out of the pipe. We make room for the tx.is_app_limited bit in the skb by borrowing a bit from the in_flight field used by NV to record the number of bytes in flight. The receive window in the TCP header is 16 bits, and the max receive window scaling shift factor is 14 (RFC 1323). So the max receive window offered by the TCP protocol is 2^(16+14) = 2^30. So we only need 30 bits for the tx.in_flight used by NV. Signed-off-by: Van Jacobson <vanj@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Nandita Dukkipati <nanditad@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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