On 5/21/21 8:20 PM, Kuniyuki Iwashima wrote:

reuseport_migrate_sock() does the same check done in
reuseport_listen_stop_sock(). If the reuseport group is capable of
migration, reuseport_migrate_sock() selects a new listener by the child
socket hash and increments the listener's sk_refcnt beforehand. Thus, if we
fail in the migration, we have to decrement it later.

We will support migration by eBPF in the later commits.

Signed-off-by: Kuniyuki Iwashima <redacted>
Signed-off-by: Martin KaFai Lau <redacted>
---
 include/net/sock_reuseport.h |  3 ++
 net/core/sock_reuseport.c    | 78 +++++++++++++++++++++++++++++-------
 2 files changed, 67 insertions(+), 14 deletions(-)

Reviewed-by: Eric Dumazet <edumazet@google.com>