af_unix: Support MSG_SPLICE_PAGES

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Make AF_UNIX sendmsg() support MSG_SPLICE_PAGES, splicing in pages from the
source iterator if possible and copying the data in otherwise.

This allows ->sendpage() to be replaced by something that can handle
multiple multipage folios in a single transaction.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Kuniyuki Iwashima <kuniyu@amazon.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

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David Howells 2023-05-22 13:11:24 +01:00 • committed by Jakub Kicinski

parent c49cf26632

commit a0dbf5f818

1 changed files with 33 additions and 16 deletions

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net/unix/af_unix.c

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