lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sat, 1 Aug 2020 20:48:10 -0700 From: Alexei Starovoitov <alexei.starovoitov@...il.com> To: Andrii Nakryiko <andriin@...com> Cc: bpf <bpf@...r.kernel.org>, Network Development <netdev@...r.kernel.org>, Alexei Starovoitov <ast@...com>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii.nakryiko@...il.com>, Kernel Team <kernel-team@...com> Subject: Re: [PATCH v2 bpf-next 0/5] BPF link force-detach support On Fri, Jul 31, 2020 at 11:29 AM Andrii Nakryiko <andriin@...com> wrote: > > This patch set adds new BPF link operation, LINK_DETACH, allowing processes > with BPF link FD to force-detach it from respective BPF hook, similarly how > BPF link is auto-detached when such BPF hook (e.g., cgroup, net_device, netns, > etc) is removed. This facility allows admin to forcefully undo BPF link > attachment, while process that created BPF link in the first place is left > intact. > > Once force-detached, BPF link stays valid in the kernel as long as there is at > least one FD open against it. It goes into defunct state, just like > auto-detached BPF link. > > bpftool also got `link detach` command to allow triggering this in > non-programmatic fashion. > > v1->v2: > - improve error reporting in `bpftool link detach` (Song). Applied. Thanks
Powered by blists - more mailing lists