Re: [PATCH v3 0/6] flow: Introduce flow_epoll_set() to centralize epoll operations

[Stefano Brivio <sbrivio@redhat.com>]

On Fri,  9 Jan 2026 17:54:32 +0100
Laurent Vivier <lvivier@redhat.com> wrote:

> Currently, each protocol handler (TCP, TCP splice, ICMP/ping, UDP) has its
> own code to add or modify file descriptors in epoll.  This leads to
> duplicated boilerplate across icmp.c, tcp.c, tcp_splice.c, and udp_flow.c,
> with each setting up epoll_ref unions and calling epoll_ctl() with
> flow-type-specific details.
> 
> This series introduces flow_epoll_set() in flow.c to handle epoll
> operations for all flow types in a unified way.  The function derives
> the epoll type from the flow type via a mapping array, providing a
> simpler interface where the caller only needs to pass the flow, command,
> events, file descriptor, and side index.
> 
> The API is:
> 
>     int flow_epoll_set(const struct flow_common *f, int command,
>                        uint32_t events, int fd, unsigned int sidei);
> 
> This centralized approach will be essential for queue pair migration in
> the upcoming multithreading work, where flows need to be moved between
> different epoll instances owned by different threads.

Applied.

-- 
Stefano