Hi, I'm new to BPF. I'm trying to write a program that analyses the structure o= f DNS requests. I keep getting the following error (bellow) at a certain point in the code (bellow). The error only occ

Hi All, Thank you for joining the call today. Here are my notes from the discussion. Thanks, Brenden === Discussion === Brenden: * Plan to tag release to coincide with kernel 5.0 Brendan: * Speaking t

Hi, I have two eBPF programs, each with its own user and kernel programs. One of the programs defines an eBPF map. How do I access this map from another eBPF kernel program? PS: I can pin the map and

Please join us tomorrow for our bi-weekly call. As usual, this meeting is open to everybody and completely optional. You might be interested to join if: You want to know what is going on in BPF land Y

Hi, I'm trying to access the packet content in tcp_transmit_skb using eBPF/BCC. I defined kprobe____tcp_transmit_skb/kretprobe____tcp_transmit_skb functions. Since in kretprobe we cannot access the fu

I have two port running xdp prog. Each have same type, struct and purpose maps. I want to use shared map. So tested such a way, run xdp prog on each device with only one func - bpf_tail_call. This cal

Hi all, I am wondering except for Netronome Cards if there are any other NICs that support XDP Offloading? Thank you in advance!

Hi all, I have a problem which has been plaguing me for a few days, and was hoping for some insight or information that might help get to the bottom of it. I think it might be a bug in the kernel inst

I created prog_map in my kern.o and call bpf_tail_call to it. Loaded with ip link set... Loaded another prog with bpftool. So tried to update map with bpftool woth id of my second progbut it does not

Hi All, Thanks for dialing in to the meeting today. Here are my notes from the discussion. Thanks, Brenden === Discussion === Alexei: - Discussion with some kernel devs regarding BPF memory model - so

Please join us tomorrow for our bi-weekly call. As usual, this meeting is open to everybody and completely optional. You might be interested to join if: You want to know what is going on in BPF land Y

Hello, I slightly changed tools/tcpaccept.py and enhance the script with the possibility to track only connection which very dropped because of listen queue overflow. Just want to know community opini

Hello folks, We have an eBPF program that shares a 64-bits integer with userspace using an array map. The eBPF program only reads the integer while the user-space application only writes it. We know t

I use simple prog to get stat from my map type BPF_MAP_TYPE_HASH. An got too slow speed to delete elems from it, lookup elem 100-1000x faster. My code is just while(bpf_map_get_next_key(fd, &key,&next

Hi All, Thank you for joining us on the call today. As usual, here are the notes. -Brenden === Discussion === Yonghong: - working on libbpf features - working on btf support in bcc - need to use upstr

Please join us tomorrow for our bi-weekly call. As usual, this meeting is open to everybody and completely optional. You might be interested to join if: You want to know what is going on in BPF land Y

Hi everyone, I am using BPF_MAP_TYPE_HASH in BPF map definition and my program is working as expected. I have read eBPF-map type BPF_MAP_TYPE_PERCPU_HASH allows for lock free uses of hash-tables in eB

Hi All, Thanks for dialing in to the call today. Here are notes from the discussion. Thanks, Brenden === Discussion === Alexei: * Spinlock patches being worked on * Proposal to standardize the BPF ELF

Please join us tomorrow for our bi-weekly call. As usual, this meeting is open to everybody and completely optional. You might be interested to join if: You want to know what is going on in BPF land Y

Hi All, Thanks for joining the call today after a short holiday hiatus. Below are my notes from the call. === Discussion === Brenden * Adopted new project kubectl-trace into github.com/iovisor from th