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Date: Sat, 22 Oct 2022 16:57:29 +0100 From: Pavel Begunkov <asml.silence@...il.com> To: Jakub Kicinski <kuba@...nel.org> Cc: Jens Axboe <axboe@...nel.dk>, Paolo Abeni <pabeni@...hat.com>, "David S . Miller" <davem@...emloft.net>, io-uring@...r.kernel.org, netdev@...r.kernel.org, Stefan Metzmacher <metze@...ba.org> Subject: Re: [PATCH for-6.1 1/3] net: flag sockets supporting msghdr originated zerocopy On 10/21/22 17:14, Jakub Kicinski wrote: > On Fri, 21 Oct 2022 11:16:39 +0100 Pavel Begunkov wrote: >> We need an efficient way in io_uring to check whether a socket supports >> zerocopy with msghdr provided ubuf_info. Add a new flag into the struct >> socket flags fields. >> >> Cc: <stable@...r.kernel.org> # 6.0 >> Signed-off-by: Pavel Begunkov <asml.silence@...il.com> >> --- >> include/linux/net.h | 1 + >> net/ipv4/tcp.c | 1 + >> net/ipv4/udp.c | 1 + >> 3 files changed, 3 insertions(+) >> >> diff --git a/include/linux/net.h b/include/linux/net.h >> index 711c3593c3b8..18d942bbdf6e 100644 >> --- a/include/linux/net.h >> +++ b/include/linux/net.h >> @@ -41,6 +41,7 @@ struct net; >> #define SOCK_NOSPACE 2 >> #define SOCK_PASSCRED 3 >> #define SOCK_PASSSEC 4 >> +#define SOCK_SUPPORT_ZC 5 > > Acked-by: Jakub Kicinski <kuba@...nel.org> > > Any idea on when this will make it to Linus? If within a week we can > probably delay: After a chat with Jens, IIUC he can take it and send out to Linus early. So, sounds like a good plan > https://lore.kernel.org/all/dc549a4d5c1d2031c64794c8e12bed55afb85c3e.1666287924.git.pabeni@redhat.com/ > and avoid the conflict. -- Pavel Begunkov
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