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sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)

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Remove ->sendpage() and ->sendpage_locked().  sendmsg() with
MSG_SPLICE_PAGES should be used instead.  This allows multiple pages and
multipage folios to be passed through.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for net/can
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-afs@lists.infradead.org
cc: mptcp@lists.linux.dev
cc: rds-devel@oss.oracle.com
cc: tipc-discussion@lists.sourceforge.net
cc: virtualization@lists.linux-foundation.org
Link: https://lore.kernel.org/r/20230623225513.2732256-16-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Howells
2023-06-23 23:55:12 +01:00
committed by Jakub Kicinski
parent e52828cc01
commit dc97391e66
66 changed files with 20 additions and 442 deletions
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48
net/socket.c
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@@ -3552,54 +3552,6 @@ int kernel_getpeername(struct socket *sock, struct sockaddr *addr)
}
EXPORT_SYMBOL(kernel_getpeername);
/**
* kernel_sendpage - send a &page through a socket (kernel space)
* @sock: socket
* @page: page
* @offset: page offset
* @size: total size in bytes
* @flags: flags (MSG_DONTWAIT, ...)
*
* Returns the total amount sent in bytes or an error.
*/
int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags)
{
if (sock->ops->sendpage) {
/* Warn in case the improper page to zero-copy send */
WARN_ONCE(!sendpage_ok(page), "improper page for zero-copy send");
return sock->ops->sendpage(sock, page, offset, size, flags);
}
return sock_no_sendpage(sock, page, offset, size, flags);
}
EXPORT_SYMBOL(kernel_sendpage);
/**
* kernel_sendpage_locked - send a &page through the locked sock (kernel space)
* @sk: sock
* @page: page
* @offset: page offset
* @size: total size in bytes
* @flags: flags (MSG_DONTWAIT, ...)
*
* Returns the total amount sent in bytes or an error.
* Caller must hold @sk.
*/
int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
size_t size, int flags)
{
struct socket *sock = sk->sk_socket;
if (sock->ops->sendpage_locked)
return sock->ops->sendpage_locked(sk, page, offset, size,
flags);
return sock_no_sendpage_locked(sk, page, offset, size, flags);
}
EXPORT_SYMBOL(kernel_sendpage_locked);
/**
* kernel_sock_shutdown - shut down part of a full-duplex connection (kernel space)
* @sock: socket