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

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 <[email protected]>
Acked-by: Marc Kleine-Budde <[email protected]> # for net/can
cc: Jens Axboe <[email protected]>
cc: Matthew Wilcox <[email protected]>
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

1 files changed, 0 insertions, 20 deletions

diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index d0537c1c8cd7..393f01b2a7e6 100644
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -963,24 +963,6 @@ static void kcm_splice_eof(struct socket *sock)
 	release_sock(sk);
 }
 
-static ssize_t kcm_sendpage(struct socket *sock, struct page *page,
-			    int offset, size_t size, int flags)
-
-{
-	struct bio_vec bvec;
-	struct msghdr msg = { .msg_flags = flags | MSG_SPLICE_PAGES, };
-
-	if (flags & MSG_SENDPAGE_NOTLAST)
-		msg.msg_flags |= MSG_MORE;
-
-	if (flags & MSG_OOB)
-		return -EOPNOTSUPP;
-
-	bvec_set_page(&bvec, page, size, offset);
-	iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
-	return kcm_sendmsg(sock, &msg, size);
-}
-
 static int kcm_recvmsg(struct socket *sock, struct msghdr *msg,
 		       size_t len, int flags)
 {
@@ -1769,7 +1751,6 @@ static const struct proto_ops kcm_dgram_ops = {
 	.recvmsg =	kcm_recvmsg,
 	.mmap =		sock_no_mmap,
 	.splice_eof =	kcm_splice_eof,
-	.sendpage =	kcm_sendpage,
 };
 
 static const struct proto_ops kcm_seqpacket_ops = {
@@ -1791,7 +1772,6 @@ static const struct proto_ops kcm_seqpacket_ops = {
 	.recvmsg =	kcm_recvmsg,
 	.mmap =		sock_no_mmap,
 	.splice_eof =	kcm_splice_eof,
-	.sendpage =	kcm_sendpage,
 	.splice_read =	kcm_splice_read,
 };