linux-kernel - [PATCH net-next 0/4] splice, net: Replace sendpage with sendmsg(MSG_SPLICE

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Date:   Wed, 24 May 2023 15:49:19 +0100
From:   David Howells <dhowells@...hat.com>
To:     netdev@...r.kernel.org
Cc:     David Howells <dhowells@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        David Ahern <dsahern@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jens Axboe <axboe@...nel.dk>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 0/4] splice, net: Replace sendpage with sendmsg(MSG_SPLICE_PAGES), part 2

Here's the second tranche of patches towards providing a MSG_SPLICE_PAGES
internal sendmsg flag that is intended to replace the ->sendpage() op with
calls to sendmsg().  MSG_SPLICE_PAGES is a hint that tells the protocol
that it should splice the pages supplied if it can and copy them if not.

This set consists of the following parts:

 (1) Implement MSG_SPLICE_PAGES support in Chelsio TLS and make
     chtls_sendpage() just a wrapper around sendmsg().

 (2) Implement MSG_SPLICE_PAGES support in AF_KCM and make kcm_sendpage()
     just a wrapper around sendmsg().

I've pushed the patches here also:

	https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=sendpage-2

David

Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=51c78a4d532efe9543a4df019ff405f05c6157f6 # part 1

David Howells (4):
  chelsio: Support MSG_SPLICE_PAGES
  chelsio: Convert chtls_sendpage() to use MSG_SPLICE_PAGES
  kcm: Support MSG_SPLICE_PAGES
  kcm: Convert kcm_sendpage() to use MSG_SPLICE_PAGES

 .../chelsio/inline_crypto/chtls/chtls_io.c    | 121 ++--------
 net/kcm/kcmsock.c                             | 216 +++++-------------
 2 files changed, 74 insertions(+), 263 deletions(-)