From: David Howells <dhowells@redhat.com>
To: netdev@vger.kernel.org
Cc: David Howells <dhowells@redhat.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
David Ahern <dsahern@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
linux-crypto@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next 0/8] crypto, splice, net: Make AF_ALG handle sendmsg(MSG_SPLICE_PAGES)
Date: Fri, 26 May 2023 15:30:56 +0100 [thread overview]
Message-ID: <20230526143104.882842-1-dhowells@redhat.com> (raw)
Here's the fourth 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.
This set consists of the following parts:
(1) Move netfs_extract_iter_to_sg() to somewhere more general and rename
it to drop the "netfs" prefix. We use this to extract directly from
an iterator into a scatterlist.
(2) Make AF_ALG use iov_iter_extract_pages(). This has the additional
effect of pinning pages obtained from userspace rather than taking
refs on them. Pages from kernel-backed iterators would not be pinned,
but AF_ALG isn't really meant for use by kernel services.
(3) Change AF_ALG still further to use extract_iter_to_sg().
(4) Make af_alg_sendmsg() support MSG_SPLICE_PAGES support and make
af_alg_sendpage() just a wrapper around sendmsg(). This has to take
refs on the pages pinned for the moment.
(5) Make hash_sendmsg() support MSG_SPLICE_PAGES by simply ignoring it.
hash_sendpage() is left untouched to be removed later, after the
splice core has been changed to call sendmsg().
I've pushed the patches here also:
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=sendpage-4
David
Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=51c78a4d532efe9543a4df019ff405f05c6157f6 # part 1
David Howells (8):
Move netfs_extract_iter_to_sg() to lib/scatterlist.c
Drop the netfs_ prefix from netfs_extract_iter_to_sg()
crypto: af_alg: Pin pages rather than ref'ing if appropriate
crypto: af_alg: Use extract_iter_to_sg() to create scatterlists
crypto: af_alg: Indent the loop in af_alg_sendmsg()
crypto: af_alg: Support MSG_SPLICE_PAGES
crypto: af_alg: Convert af_alg_sendpage() to use MSG_SPLICE_PAGES
crypto: af_alg/hash: Support MSG_SPLICE_PAGES
crypto/af_alg.c | 183 +++++++++++-------------
crypto/algif_aead.c | 34 ++---
crypto/algif_hash.c | 110 +++++++++------
crypto/algif_skcipher.c | 10 +-
fs/cifs/smb2ops.c | 4 +-
fs/cifs/smbdirect.c | 2 +-
fs/netfs/iterator.c | 266 -----------------------------------
include/crypto/if_alg.h | 7 +-
include/linux/netfs.h | 4 -
include/linux/scatterlist.h | 1 +
include/linux/uio.h | 5 +
lib/scatterlist.c | 267 ++++++++++++++++++++++++++++++++++++
12 files changed, 449 insertions(+), 444 deletions(-)
next reply other threads:[~2023-05-26 14:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 14:30 David Howells [this message]
2023-05-26 14:30 ` [PATCH net-next 1/8] Move netfs_extract_iter_to_sg() to lib/scatterlist.c David Howells
2023-05-27 12:20 ` Simon Horman
2023-05-28 8:33 ` David Howells
2023-05-26 14:30 ` [PATCH net-next 2/8] Drop the netfs_ prefix from netfs_extract_iter_to_sg() David Howells
2023-05-27 12:24 ` Simon Horman
2023-05-26 14:30 ` [PATCH net-next 3/8] crypto: af_alg: Pin pages rather than ref'ing if appropriate David Howells
2023-05-26 14:31 ` [PATCH net-next 4/8] crypto: af_alg: Use extract_iter_to_sg() to create scatterlists David Howells
2023-05-26 14:31 ` [PATCH net-next 5/8] crypto: af_alg: Indent the loop in af_alg_sendmsg() David Howells
2023-05-26 14:31 ` [PATCH net-next 6/8] crypto: af_alg: Support MSG_SPLICE_PAGES David Howells
2023-05-26 14:31 ` [PATCH net-next 7/8] crypto: af_alg: Convert af_alg_sendpage() to use MSG_SPLICE_PAGES David Howells
2023-05-26 14:31 ` [PATCH net-next 8/8] crypto: af_alg/hash: Support MSG_SPLICE_PAGES David Howells
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