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author | David S. Miller <davem@davemloft.net> | 2016-04-24 14:06:56 -0400 |
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committer | David S. Miller <davem@davemloft.net> | 2016-04-24 14:06:56 -0400 |
commit | 6a74c1965ac8128da5feadccf739456c6586ad91 (patch) | |
tree | 9ad2a00c8fad6af13849fe0cec9f0f511768e9e7 /lib/dump_stack.c | |
parent | 11afbff86168bc2ce11ae9d64ff687567a2352de (diff) | |
parent | 2de8023e7bb288e0bfbe0325a7690d32dc670873 (diff) | |
download | op-kernel-dev-6a74c1965ac8128da5feadccf739456c6586ad91.zip op-kernel-dev-6a74c1965ac8128da5feadccf739456c6586ad91.tar.gz |
Merge branch 'tcp-tcstamp_ack-frag-coalesce'
Martin KaFai Lau says:
====================
tcp: Handle txstamp_ack when fragmenting/coalescing skbs
This patchset is to handle the txstamp-ack bit when
fragmenting/coalescing skbs.
The second patch depends on the recently posted series
for the net branch:
"tcp: Merge timestamp info when coalescing skbs"
A BPF prog is used to kprobe to sock_queue_err_skb()
and print out the value of serr->ee.ee_data. The BPF
prog (run-able from bcc) is attached here:
BPF prog used for testing:
~~~~~
from __future__ import print_function
from bcc import BPF
bpf_text = """
int trace_err_skb(struct pt_regs *ctx)
{
struct sk_buff *skb = (struct sk_buff *)ctx->si;
struct sock *sk = (struct sock *)ctx->di;
struct sock_exterr_skb *serr;
u32 ee_data = 0;
if (!sk || !skb)
return 0;
serr = SKB_EXT_ERR(skb);
bpf_probe_read(&ee_data, sizeof(ee_data), &serr->ee.ee_data);
bpf_trace_printk("ee_data:%u\\n", ee_data);
return 0;
};
"""
b = BPF(text=bpf_text)
b.attach_kprobe(event="sock_queue_err_skb", fn_name="trace_err_skb")
print("Attached to kprobe")
b.trace_print()
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/dump_stack.c')
0 files changed, 0 insertions, 0 deletions