On 5/1/24 10:03, Andrii Nakryiko wrote:
On Mon, Apr 29, 2024 at 2:36 PM Kui-Feng Lee <thinker.li@xxxxxxxxx> wrote:Add epoll support to bpf struct_ops links to trigger EPOLLHUP event upon detachment. Signed-off-by: Kui-Feng Lee <thinker.li@xxxxxxxxx> --- include/linux/bpf.h | 2 ++ kernel/bpf/bpf_struct_ops.c | 14 ++++++++++++++ kernel/bpf/syscall.c | 15 +++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index eeeed4b1bd32..a4550b927352 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1574,6 +1574,7 @@ struct bpf_link { const struct bpf_link_ops *ops; struct bpf_prog *prog; struct work_struct work; + wait_queue_head_t wait_hup;let's keep it struct_ops-specific, there is no need to pay for this for all existing BPF link types. We can always generalize later, if necessary.
sure!
pw-bot: cr}; struct bpf_link_ops { @@ -1587,6 +1588,7 @@ struct bpf_link_ops { struct bpf_link_info *info); int (*update_map)(struct bpf_link *link, struct bpf_map *new_map, struct bpf_map *old_map); + __poll_t (*poll)(struct file *file, struct poll_table_struct *pts); }; struct bpf_tramp_link {[...]
