tcp: Support MSG_SPLICE_PAGES

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Make TCP's sendmsg() support MSG_SPLICE_PAGES.  This causes pages to be
spliced or copied (if it cannot be spliced) from the source iterator.

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: David Ahern <dsahern@kernel.org>
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 13:11:13 +01:00 • committed by Jakub Kicinski

parent 2e910b9532

commit 270a1c3de4

1 changed files with 36 additions and 7 deletions

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net/ipv4/tcp.c

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