[RFC PATCH v2 48/48] sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)

David Howells
2023-03-29T14:24:25Z

[!] Note: This is a work in progress. At the moment, some things won't
build if this patch is applied. nvme, kcm, smc, tls.

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: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: bpf@vger.kernel.org
cc: dccp@vger.kernel.org
cc: linux-afs@lists.infradead.org
cc: linux-arm-msm@vger.kernel.org
cc: linux-can@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: linux-doc@vger.kernel.org
cc: linux-hams@vger.kernel.org
cc: linux-kernel@vger.kernel.org
cc: linux-rdma@vger.kernel.org
cc: linux-sctp@vger.kernel.org
cc: linux-wpan@vger.kernel.org
cc: linux-x25@vger.kernel.org
cc: mptcp@lists.linux.dev
cc: netdev@vger.kernel.org
cc: rds-devel@oss.oracle.com
cc: tipc-discussion@lists.sourceforge.net
cc: virtualization@lists.linux-foundation.org
---
Documentation/networking/scaling.rst | 4 +-
crypto/af_alg.c | 29 ------
crypto/algif_aead.c | 22 +----
crypto/algif_rng.c | 2 -
crypto/algif_skcipher.c | 14 ---
include/linux/net.h | 8 --
include/net/inet_common.h | 2 -
include/net/sock.h | 6 --
net/appletalk/ddp.c | 1 -
net/atm/pvc.c | 1 -
net/atm/svc.c | 1 -
net/ax25/af_ax25.c | 1 -
net/caif/caif_socket.c | 2 -
net/can/bcm.c | 1 -
net/can/isotp.c | 1 -
net/can/j1939/socket.c | 1 -
net/can/raw.c | 1 -
net/core/sock.c | 35 +------
net/dccp/ipv4.c | 1 -
net/dccp/ipv6.c | 1 -
net/ieee802154/socket.c | 2 -
net/ipv4/af_inet.c | 21 ----
net/ipv4/tcp.c | 34 -------
net/ipv4/tcp_bpf.c | 21 +---
net/ipv4/tcp_ipv4.c | 1 -
net/ipv4/udp.c | 22 -----
net/ipv4/udp_impl.h | 2 -
net/ipv4/udplite.c | 1 -
net/ipv6/af_inet6.c | 3 -
net/ipv6/raw.c | 1 -
net/ipv6/tcp_ipv6.c | 1 -
net/key/af_key.c | 1 -
net/l2tp/l2tp_ip.c | 1 -
net/l2tp/l2tp_ip6.c | 1 -
net/llc/af_llc.c | 1 -
net/mctp/af_mctp.c | 1 -
net/mptcp/protocol.c | 2 -
net/netlink/af_netlink.c | 1 -
net/netrom/af_netrom.c | 1 -
net/packet/af_packet.c | 2 -
net/phonet/socket.c | 2 -
net/qrtr/af_qrtr.c | 1 -
net/rds/af_rds.c | 1 -
net/rose/af_rose.c | 1 -
net/rxrpc/af_rxrpc.c | 1 -
net/sctp/protocol.c | 1 -
net/socket.c | 48 ---------
net/tipc/socket.c | 3 -
net/unix/af_unix.c | 139 ---------------------------
net/vmw_vsock/af_vsock.c | 3 -
net/x25/af_x25.c | 1 -
net/xdp/xsk.c | 1 -
52 files changed, 9 insertions(+), 447 deletions(-)

diff --git a/Documentation/networking/scaling.rst b/Documentation/networking/scaling.rst
index 3d435caa3ef2..92c9fb46d6a2 100644
--- a/Documentation/networking/scaling.rst
+++ b/Documentation/networking/scaling.rst
@@ -269,8 +269,8 @@ a single application thread handles flows with many different flow hashes.
rps_sock_flow_table is a global flow table that contains the *desired* CPU
for flows: the CPU that is currently processing the flow in userspace.
Each table value is a CPU index that is updated during calls to recvmsg
-and sendmsg (specifically, inet_recvmsg(), inet_sendmsg(), inet_sendpage()
-and tcp_splice_read()).
+and sendmsg (specifically, inet_recvmsg(), inet_sendmsg() and
+tcp_splice_read()).

When the scheduler moves a thread to a new CPU while it has outstanding
receive packets on the old CPU, packets may arrive out of order. To
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 686610a4986f..9f84816dcabf 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -483,7 +483,6 @@ static const struct proto_ops alg_proto_ops = {
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
.sendmsg = sock_no_sendmsg,
.recvmsg = sock_no_recvmsg,

@@ -1110,34 +1109,6 @@ int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
}
EXPORT_SYMBOL_GPL(af_alg_sendmsg);

-/**
- * af_alg_sendpage - sendpage system call handler
- * @sock: socket of connection to user space to write to
- * @page: data to send
- * @offset: offset into page to begin sending
- * @size: length of data
- * @flags: message send/receive flags
- *
- * This is a generic implementation of sendpage to fill ctx->tsgl_list.
- */
-ssize_t af_alg_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,
- };
-
- bvec_set_page(&bvec, page, size, offset);
- iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
-
- if (flags & MSG_SENDPAGE_NOTLAST)
- msg.msg_flags |= MSG_MORE;
-
- return sock_sendmsg(sock, &msg);
-}
-EXPORT_SYMBOL_GPL(af_alg_sendpage);
-
/**
* af_alg_free_resources - release resources required for crypto request
* @areq: Request holding the TX and RX SGL
diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c
index b16111a3025a..37b08e5f9114 100644
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -9,10 +9,10 @@
* The following concept of the memory management is used:
*
* The kernel maintains two SGLs, the TX SGL and the RX SGL. The TX SGL is
- * filled by user space with the data submitted via sendpage. Filling up
- * the TX SGL does not cause a crypto operation -- the data will only be
- * tracked by the kernel. Upon receipt of one recvmsg call, the caller must
- * provide a buffer which is tracked with the RX SGL.
+ * filled by user space with the data submitted via sendmsg (maybe with with
+ * MSG_SPLICE_PAGES). Filling up the TX SGL does not cause a crypto operation
+ * -- the data will only be tracked by the kernel. Upon receipt of one recvmsg
+ * call, the caller must provide a buffer which is tracked with the RX SGL.
*
* During the processing of the recvmsg operation, the cipher request is
* allocated and prepared. As part of the recvmsg operation, the processed
@@ -368,7 +368,6 @@ static struct proto_ops algif_aead_ops = {

.release = af_alg_release,
.sendmsg = aead_sendmsg,
- .sendpage = af_alg_sendpage,
.recvmsg = aead_recvmsg,
.poll = af_alg_poll,
};
@@ -420,18 +419,6 @@ static int aead_sendmsg_nokey(struct socket *sock, struct msghdr *msg,
return aead_sendmsg(sock, msg, size);
}

-static ssize_t aead_sendpage_nokey(struct socket *sock, struct page *page,
- int offset, size_t size, int flags)
-{
- int err;
-
- err = aead_check_key(sock);
- if (err)
- return err;
-
- return af_alg_sendpage(sock, page, offset, size, flags);
-}
-
static int aead_recvmsg_nokey(struct socket *sock, struct msghdr *msg,
size_t ignored, int flags)
{
@@ -459,7 +446,6 @@ static struct proto_ops algif_aead_ops_nokey = {

.release = af_alg_release,
.sendmsg = aead_sendmsg_nokey,
- .sendpage = aead_sendpage_nokey,
.recvmsg = aead_recvmsg_nokey,
.poll = af_alg_poll,
};
diff --git a/crypto/algif_rng.c b/crypto/algif_rng.c
index 407408c43730..10c41adac3b1 100644
--- a/crypto/algif_rng.c
+++ b/crypto/algif_rng.c
@@ -174,7 +174,6 @@ static struct proto_ops algif_rng_ops = {
.bind = sock_no_bind,
.accept = sock_no_accept,
.sendmsg = sock_no_sendmsg,
- .sendpage = sock_no_sendpage,

.release = af_alg_release,
.recvmsg = rng_recvmsg,
@@ -192,7 +191,6 @@ static struct proto_ops __maybe_unused algif_rng_test_ops = {
.mmap = sock_no_mmap,
.bind = sock_no_bind,
.accept = sock_no_accept,
- .sendpage = sock_no_sendpage,

.release = af_alg_release,
.recvmsg = rng_test_recvmsg,
diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index b1f321b9f846..9ada9b741af8 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -194,7 +194,6 @@ static struct proto_ops algif_skcipher_ops = {

.release = af_alg_release,
.sendmsg = skcipher_sendmsg,
- .sendpage = af_alg_sendpage,
.recvmsg = skcipher_recvmsg,
.poll = af_alg_poll,
};
@@ -246,18 +245,6 @@ static int skcipher_sendmsg_nokey(struct socket *sock, struct msghdr *msg,
return skcipher_sendmsg(sock, msg, size);
}

-static ssize_t skcipher_sendpage_nokey(struct socket *sock, struct page *page,
- int offset, size_t size, int flags)
-{
- int err;
-
- err = skcipher_check_key(sock);
- if (err)
- return err;
-
- return af_alg_sendpage(sock, page, offset, size, flags);
-}
-
static int skcipher_recvmsg_nokey(struct socket *sock, struct msghdr *msg,
size_t ignored, int flags)
{
@@ -285,7 +272,6 @@ static struct proto_ops algif_skcipher_ops_nokey = {

.release = af_alg_release,
.sendmsg = skcipher_sendmsg_nokey,
- .sendpage = skcipher_sendpage_nokey,
.recvmsg = skcipher_recvmsg_nokey,
.poll = af_alg_poll,
};
diff --git a/include/linux/net.h b/include/linux/net.h
index b73ad8e3c212..e5794968ac9f 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -206,8 +206,6 @@ struct proto_ops {
size_t total_len, int flags);
int (*mmap) (struct file *file, struct socket *sock,
struct vm_area_struct * vma);
- ssize_t (*sendpage) (struct socket *sock, struct page *page,
- int offset, size_t size, int flags);
ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len, unsigned int flags);
int (*set_peek_off)(struct sock *sk, int val);
@@ -220,8 +218,6 @@ struct proto_ops {
sk_read_actor_t recv_actor);
/* This is different from read_sock(), it reads an entire skb at a time. */
int (*read_skb)(struct sock *sk, skb_read_actor_t recv_actor);
- int (*sendpage_locked)(struct sock *sk, struct page *page,
- int offset, size_t size, int flags);
int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg,
size_t size);
int (*set_rcvlowat)(struct sock *sk, int val);
@@ -339,10 +335,6 @@ int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
int flags);
int kernel_getsockname(struct socket *sock, struct sockaddr *addr);
int kernel_getpeername(struct socket *sock, struct sockaddr *addr);
-int kernel_sendpage(struct socket *sock, struct page *page, int offset,
- size_t size, int flags);
-int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
- size_t size, int flags);
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);

/* Routine returns the IP overhead imposed by a (caller-protected) socket. */
diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index cec453c18f1d..054c3388fa51 100644
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -33,8 +33,6 @@ int inet_accept(struct socket *sock, struct socket *newsock, int flags,
bool kern);
int inet_send_prepare(struct sock *sk);
int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size);
-ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
- size_t size, int flags);
int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int flags);
int inet_shutdown(struct socket *sock, int how);
diff --git a/include/net/sock.h b/include/net/sock.h
index 573f2bf7e0de..4618cd21e16b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1265,8 +1265,6 @@ struct proto {
size_t len);
int (*recvmsg)(struct sock *sk, struct msghdr *msg,
size_t len, int flags, int *addr_len);
- int (*sendpage)(struct sock *sk, struct page *page,
- int offset, size_t size, int flags);
int (*bind)(struct sock *sk,
struct sockaddr *addr, int addr_len);
int (*bind_add)(struct sock *sk,
@@ -1906,10 +1904,6 @@ int sock_no_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t len);
int sock_no_recvmsg(struct socket *, struct msghdr *, size_t, int);
int sock_no_mmap(struct file *file, struct socket *sock,
struct vm_area_struct *vma);
-ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset,
- size_t size, int flags);
-ssize_t sock_no_sendpage_locked(struct sock *sk, struct page *page,
- int offset, size_t size, int flags);

/*
* Functions to fill in entries in struct proto_ops when a protocol
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index a06f4d4a6f47..8978fb6212ff 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1929,7 +1929,6 @@ static const struct proto_ops atalk_dgram_ops = {
.sendmsg = atalk_sendmsg,
.recvmsg = atalk_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct notifier_block ddp_notifier = {
diff --git a/net/atm/pvc.c b/net/atm/pvc.c
index 53e7d3f39e26..66d9a9bd5896 100644
--- a/net/atm/pvc.c
+++ b/net/atm/pvc.c
@@ -126,7 +126,6 @@ static const struct proto_ops pvc_proto_ops = {
.sendmsg = vcc_sendmsg,
.recvmsg = vcc_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

diff --git a/net/atm/svc.c b/net/atm/svc.c
index 4a02bcaad279..289240fe234e 100644
--- a/net/atm/svc.c
+++ b/net/atm/svc.c
@@ -649,7 +649,6 @@ static const struct proto_ops svc_proto_ops = {
.sendmsg = vcc_sendmsg,
.recvmsg = vcc_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index d8da400cb4de..5db805d5f74d 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -2022,7 +2022,6 @@ static const struct proto_ops ax25_proto_ops = {
.sendmsg = ax25_sendmsg,
.recvmsg = ax25_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

/*
diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
index 4eebcc66c19a..9c82698da4f5 100644
--- a/net/caif/caif_socket.c
+++ b/net/caif/caif_socket.c
@@ -976,7 +976,6 @@ static const struct proto_ops caif_seqpacket_ops = {
.sendmsg = caif_seqpkt_sendmsg,
.recvmsg = caif_seqpkt_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static const struct proto_ops caif_stream_ops = {
@@ -996,7 +995,6 @@ static const struct proto_ops caif_stream_ops = {
.sendmsg = caif_stream_sendmsg,
.recvmsg = caif_stream_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

/* This function is called when a socket is finally destroyed. */
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 27706f6ace34..65a946a36d92 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -1699,7 +1699,6 @@ static const struct proto_ops bcm_ops = {
.sendmsg = bcm_sendmsg,
.recvmsg = bcm_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct proto bcm_proto __read_mostly = {
diff --git a/net/can/isotp.c b/net/can/isotp.c
index 9bc344851704..0c3d11c29a2b 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -1633,7 +1633,6 @@ static const struct proto_ops isotp_ops = {
.sendmsg = isotp_sendmsg,
.recvmsg = isotp_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct proto isotp_proto __read_mostly = {
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index 7e90f9e61d9b..2bfe4f79bb67 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -1301,7 +1301,6 @@ static const struct proto_ops j1939_ops = {
.sendmsg = j1939_sk_sendmsg,
.recvmsg = j1939_sk_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct proto j1939_proto __read_mostly = {
diff --git a/net/can/raw.c b/net/can/raw.c
index f64469b98260..15c79b079184 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -962,7 +962,6 @@ static const struct proto_ops raw_ops = {
.sendmsg = raw_sendmsg,
.recvmsg = raw_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct proto raw_proto __read_mostly = {
diff --git a/net/core/sock.c b/net/core/sock.c
index 341c565dbc26..c2ae77bb2075 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -3223,36 +3223,6 @@ void __receive_sock(struct file *file)
}
}

-ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags)
-{
- ssize_t res;
- struct msghdr msg = {.msg_flags = flags};
- struct kvec iov;
- char *kaddr = kmap(page);
- iov.iov_base = kaddr + offset;
- iov.iov_len = size;
- res = kernel_sendmsg(sock, &msg, &iov, 1, size);
- kunmap(page);
- return res;
-}
-EXPORT_SYMBOL(sock_no_sendpage);
-
-ssize_t sock_no_sendpage_locked(struct sock *sk, struct page *page,
- int offset, size_t size, int flags)
-{
- ssize_t res;
- struct msghdr msg = {.msg_flags = flags};
- struct kvec iov;
- char *kaddr = kmap(page);
-
- iov.iov_base = kaddr + offset;
- iov.iov_len = size;
- res = kernel_sendmsg_locked(sk, &msg, &iov, 1, size);
- kunmap(page);
- return res;
-}
-EXPORT_SYMBOL(sock_no_sendpage_locked);
-
/*
* Default Socket Callbacks
*/
@@ -4008,7 +3978,7 @@ static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
{

seq_printf(seq, "%-9s %4u %6d %6ld %-3s %6u %-3s %-10s "
- "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
+ "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
proto->name,
proto->obj_size,
sock_prot_inuse_get(seq_file_net(seq), proto),
@@ -4029,7 +3999,6 @@ static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
proto_method_implemented(proto->getsockopt),
proto_method_implemented(proto->sendmsg),
proto_method_implemented(proto->recvmsg),
- proto_method_implemented(proto->sendpage),
proto_method_implemented(proto->bind),
proto_method_implemented(proto->backlog_rcv),
proto_method_implemented(proto->hash),
@@ -4050,7 +4019,7 @@ static int proto_seq_show(struct seq_file *seq, void *v)
"maxhdr",
"slab",
"module",
- "cl co di ac io in de sh ss gs se re sp bi br ha uh gp em\n");
+ "cl co di ac io in de sh ss gs se re bi br ha uh gp em\n");
else
proto_seq_printf(seq, list_entry(v, struct proto, node));
return 0;
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index b780827f5e0a..ea808de374ea 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -1008,7 +1008,6 @@ static const struct proto_ops inet_dccp_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct inet_protosw dccp_v4_protosw = {
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index b9d7c3dd1cb3..23eb8159e3cd 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -1085,7 +1085,6 @@ static const struct proto_ops inet6_dccp_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index 1fa2fe041ec0..1238f036117f 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -426,7 +426,6 @@ static const struct proto_ops ieee802154_raw_ops = {
.sendmsg = ieee802154_sock_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

/* DGRAM Sockets (802.15.4 dataframes) */
@@ -990,7 +989,6 @@ static const struct proto_ops ieee802154_dgram_ops = {
.sendmsg = ieee802154_sock_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static void ieee802154_sock_destruct(struct sock *sk)
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 8db6747f892f..869b49933f15 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -827,23 +827,6 @@ int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
}
EXPORT_SYMBOL(inet_sendmsg);

-ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
- size_t size, int flags)
-{
- struct sock *sk = sock->sk;
- const struct proto *prot;
-
- if (unlikely(inet_send_prepare(sk)))
- return -EAGAIN;
-
- /* IPV6_ADDRFORM can change sk->sk_prot under us. */
- prot = READ_ONCE(sk->sk_prot);
- if (prot->sendpage)
- return prot->sendpage(sk, page, offset, size, flags);
- return sock_no_sendpage(sock, page, offset, size, flags);
-}
-EXPORT_SYMBOL(inet_sendpage);
-
INDIRECT_CALLABLE_DECLARE(int udp_recvmsg(struct sock *, struct msghdr *,
size_t, int, int *));
int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
@@ -1046,12 +1029,10 @@ const struct proto_ops inet_stream_ops = {
#ifdef CONFIG_MMU
.mmap = tcp_mmap,
#endif
- .sendpage = inet_sendpage,
.splice_read = tcp_splice_read,
.read_sock = tcp_read_sock,
.read_skb = tcp_read_skb,
.sendmsg_locked = tcp_sendmsg_locked,
- .sendpage_locked = tcp_sendpage_locked,
.peek_len = tcp_peek_len,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet_compat_ioctl,
@@ -1080,7 +1061,6 @@ const struct proto_ops inet_dgram_ops = {
.read_skb = udp_read_skb,
.recvmsg = inet_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = inet_sendpage,
.set_peek_off = sk_set_peek_off,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet_compat_ioctl,
@@ -1111,7 +1091,6 @@ static const struct proto_ops inet_sockraw_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = inet_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = inet_sendpage,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet_compat_ioctl,
#endif
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index a8f8ccaed10e..bd01a1b23c7b 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -971,40 +971,6 @@ static int tcp_wmem_schedule(struct sock *sk, int copy)
return min(copy, sk->sk_forward_alloc);
}

-int tcp_sendpage_locked(struct sock *sk, struct page *page, int offset,
- size_t size, int flags)
-{
- struct bio_vec bvec;
- struct msghdr msg = { .msg_flags = flags | MSG_SPLICE_PAGES, };
-
- if (!(sk->sk_route_caps & NETIF_F_SG))
- return sock_no_sendpage_locked(sk, page, offset, size, flags);
-
- tcp_rate_check_app_limited(sk); /* is sending application-limited? */
-
- bvec_set_page(&bvec, page, size, offset);
- iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
-
- if (flags & MSG_SENDPAGE_NOTLAST)
- msg.msg_flags |= MSG_MORE;
-
- return tcp_sendmsg_locked(sk, &msg, size);
-}
-EXPORT_SYMBOL_GPL(tcp_sendpage_locked);
-
-int tcp_sendpage(struct sock *sk, struct page *page, int offset,
- size_t size, int flags)
-{
- int ret;
-
- lock_sock(sk);
- ret = tcp_sendpage_locked(sk, page, offset, size, flags);
- release_sock(sk);
-
- return ret;
-}
-EXPORT_SYMBOL(tcp_sendpage);
-
void tcp_free_fastopen_req(struct tcp_sock *tp)
{
if (tp->fastopen_req) {
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index de37a4372437..ab83cfb9de22 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -482,23 +482,6 @@ static int tcp_bpf_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
return copied ? copied : err;
}

-static int tcp_bpf_sendpage(struct sock *sk, struct page *page, int offset,
- size_t size, int flags)
-{
- struct bio_vec bvec;
- struct msghdr msg = {
- .msg_flags = flags | MSG_SPLICE_PAGES,
- };
-
- bvec_set_page(&bvec, page, size, offset);
- iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
-
- if (flags & MSG_SENDPAGE_NOTLAST)
- msg.msg_flags |= MSG_MORE;
-
- return tcp_bpf_sendmsg(sk, &msg, size);
-}
-
enum {
TCP_BPF_IPV4,
TCP_BPF_IPV6,
@@ -528,7 +511,6 @@ static void tcp_bpf_rebuild_protos(struct proto prot[TCP_BPF_NUM_CFGS],

prot[TCP_BPF_TX] = prot[TCP_BPF_BASE];
prot[TCP_BPF_TX].sendmsg = tcp_bpf_sendmsg;
- prot[TCP_BPF_TX].sendpage = tcp_bpf_sendpage;

prot[TCP_BPF_RX] = prot[TCP_BPF_BASE];
prot[TCP_BPF_RX].recvmsg = tcp_bpf_recvmsg_parser;
@@ -563,8 +545,7 @@ static int tcp_bpf_assert_proto_ops(struct proto *ops)
* indeed valid assumptions.
*/
return ops->recvmsg == tcp_recvmsg &&
- ops->sendmsg == tcp_sendmsg &&
- ops->sendpage == tcp_sendpage ? 0 : -ENOTSUPP;
+ ops->sendmsg == tcp_sendmsg ? 0 : -ENOTSUPP;
}

int tcp_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index ea370afa70ed..5c2e1c1ca329 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3112,7 +3112,6 @@ struct proto tcp_prot = {
.keepalive = tcp_set_keepalive,
.recvmsg = tcp_recvmsg,
.sendmsg = tcp_sendmsg,
- .sendpage = tcp_sendpage,
.backlog_rcv = tcp_v4_do_rcv,
.release_cb = tcp_release_cb,
.hash = inet_hash,
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 097feb92e215..85bd5960f7ef 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1329,27 +1329,6 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
}
EXPORT_SYMBOL(udp_sendmsg);

-int udp_sendpage(struct sock *sk, struct page *page, int offset,
- size_t size, int flags)
-{
- struct bio_vec bvec;
- struct msghdr msg = {
- .msg_flags = flags | MSG_SPLICE_PAGES | MSG_MORE
- };
- int ret;
-
- bvec_set_page(&bvec, page, size, offset);
- iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size);
-
- if (flags & MSG_SENDPAGE_NOTLAST)
- msg.msg_flags |= MSG_MORE;
-
- lock_sock(sk);
- ret = udp_sendmsg(sk, &msg, size);
- release_sock(sk);
- return ret;
-}
-
#define UDP_SKB_IS_STATELESS 0x80000000

/* all head states (dst, sk, nf conntrack) except skb extensions are
@@ -2926,7 +2905,6 @@ struct proto udp_prot = {
.getsockopt = udp_getsockopt,
.sendmsg = udp_sendmsg,
.recvmsg = udp_recvmsg,
- .sendpage = udp_sendpage,
.release_cb = ip4_datagram_release_cb,
.hash = udp_lib_hash,
.unhash = udp_lib_unhash,
diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
index 4ba7a88a1b1d..e1ff3a375996 100644
--- a/net/ipv4/udp_impl.h
+++ b/net/ipv4/udp_impl.h
@@ -19,8 +19,6 @@ int udp_getsockopt(struct sock *sk, int level, int optname,

int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
int *addr_len);
-int udp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
- int flags);
void udp_destroy_sock(struct sock *sk);

#ifdef CONFIG_PROC_FS
diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c
index e0c9cc39b81e..69870f0afc6c 100644
--- a/net/ipv4/udplite.c
+++ b/net/ipv4/udplite.c
@@ -54,7 +54,6 @@ struct proto udplite_prot = {
.getsockopt = udp_getsockopt,
.sendmsg = udp_sendmsg,
.recvmsg = udp_recvmsg,
- .sendpage = udp_sendpage,
.hash = udp_lib_hash,
.unhash = udp_lib_unhash,
.rehash = udp_v4_rehash,
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 38689bedfce7..769c76d59053 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -695,9 +695,7 @@ const struct proto_ops inet6_stream_ops = {
#ifdef CONFIG_MMU
.mmap = tcp_mmap,
#endif
- .sendpage = inet_sendpage,
.sendmsg_locked = tcp_sendmsg_locked,
- .sendpage_locked = tcp_sendpage_locked,
.splice_read = tcp_splice_read,
.read_sock = tcp_read_sock,
.read_skb = tcp_read_skb,
@@ -728,7 +726,6 @@ const struct proto_ops inet6_dgram_ops = {
.recvmsg = inet6_recvmsg, /* retpoline's sake */
.read_skb = udp_read_skb,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
.set_peek_off = sk_set_peek_off,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index bac9ba747bde..c6c062678c0e 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1298,7 +1298,6 @@ const struct proto_ops inet6_sockraw_ops = {
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 1bf93b61aa06..03ba1e389901 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2151,7 +2151,6 @@ struct proto tcpv6_prot = {
.keepalive = tcp_set_keepalive,
.recvmsg = tcp_recvmsg,
.sendmsg = tcp_sendmsg,
- .sendpage = tcp_sendpage,
.backlog_rcv = tcp_v6_do_rcv,
.release_cb = tcp_release_cb,
.hash = inet6_hash,
diff --git a/net/key/af_key.c b/net/key/af_key.c
index a815f5ab4c49..bf59d42dc697 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3757,7 +3757,6 @@ static const struct proto_ops pfkey_ops = {
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,

/* Now the operations that really occur. */
.release = pfkey_release,
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index 4db5a554bdbd..d0dcbe3a4cd7 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -625,7 +625,6 @@ static const struct proto_ops l2tp_ip_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct inet_protosw l2tp_ip_protosw = {
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index 2478aa60145f..49296ce14a90 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -751,7 +751,6 @@ static const struct proto_ops l2tp_ip6_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index da7fe94bea2e..addd94da2a81 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -1230,7 +1230,6 @@ static const struct proto_ops llc_ui_ops = {
.sendmsg = llc_ui_sendmsg,
.recvmsg = llc_ui_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static const char llc_proc_err_msg[] __initconst =
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c
index 3150f3f0c872..c6fe2e6b85dd 100644
--- a/net/mctp/af_mctp.c
+++ b/net/mctp/af_mctp.c
@@ -485,7 +485,6 @@ static const struct proto_ops mctp_dgram_ops = {
.sendmsg = mctp_sendmsg,
.recvmsg = mctp_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_ioctl = mctp_compat_ioctl,
#endif
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 3ad9c46202fc..ade89b8d0082 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3816,7 +3816,6 @@ static const struct proto_ops mptcp_stream_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = inet_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = inet_sendpage,
};

static struct inet_protosw mptcp_protosw = {
@@ -3911,7 +3910,6 @@ static const struct proto_ops mptcp_v6_stream_ops = {
.sendmsg = inet6_sendmsg,
.recvmsg = inet6_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = inet_sendpage,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index c64277659753..f70073a3bb49 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -2841,7 +2841,6 @@ static const struct proto_ops netlink_ops = {
.sendmsg = netlink_sendmsg,
.recvmsg = netlink_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static const struct net_proto_family netlink_family_ops = {
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 5a4cb796150f..eb8ccbd58df7 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1364,7 +1364,6 @@ static const struct proto_ops nr_proto_ops = {
.sendmsg = nr_sendmsg,
.recvmsg = nr_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct notifier_block nr_dev_notifier = {
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index d4e76e2ae153..385bd4982b80 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -4604,7 +4604,6 @@ static const struct proto_ops packet_ops_spkt = {
.sendmsg = packet_sendmsg_spkt,
.recvmsg = packet_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static const struct proto_ops packet_ops = {
@@ -4626,7 +4625,6 @@ static const struct proto_ops packet_ops = {
.sendmsg = packet_sendmsg,
.recvmsg = packet_recvmsg,
.mmap = packet_mmap,
- .sendpage = sock_no_sendpage,
};

static const struct net_proto_family packet_family_ops = {
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 71e2caf6ab85..a246f7d0a817 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -441,7 +441,6 @@ const struct proto_ops phonet_dgram_ops = {
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

const struct proto_ops phonet_stream_ops = {
@@ -462,7 +461,6 @@ const struct proto_ops phonet_stream_ops = {
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};
EXPORT_SYMBOL(phonet_stream_ops);

diff --git a/net/qrtr/af_qrtr.c b/net/qrtr/af_qrtr.c
index 5c2fb992803b..5bb7d680bd5f 100644
--- a/net/qrtr/af_qrtr.c
+++ b/net/qrtr/af_qrtr.c
@@ -1240,7 +1240,6 @@ static const struct proto_ops qrtr_proto_ops = {
.shutdown = sock_no_shutdown,
.release = qrtr_release,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct proto qrtr_proto = {
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 3ff6995244e5..01c4cdfef45d 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -653,7 +653,6 @@ static const struct proto_ops rds_proto_ops = {
.sendmsg = rds_sendmsg,
.recvmsg = rds_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static void rds_sock_destruct(struct sock *sk)
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index ca2b17f32670..49dafe9ac72f 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1496,7 +1496,6 @@ static const struct proto_ops rose_proto_ops = {
.sendmsg = rose_sendmsg,
.recvmsg = rose_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct notifier_block rose_dev_notifier = {
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 102f5cbff91a..182495804f8f 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -938,7 +938,6 @@ static const struct proto_ops rxrpc_rpc_ops = {
.sendmsg = rxrpc_sendmsg,
.recvmsg = rxrpc_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct proto rxrpc_proto = {
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index c365df24ad33..acb2d2a69268 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1135,7 +1135,6 @@ static const struct proto_ops inet_seqpacket_ops = {
.sendmsg = inet_sendmsg,
.recvmsg = inet_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

/* Registration with AF_INET family. */
diff --git a/net/socket.c b/net/socket.c
index 2cd5c2bcdde8..382775cbb51c 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -3548,54 +3548,6 @@ 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
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 37edfe10f8c6..d2072fbf3272 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -3375,7 +3375,6 @@ static const struct proto_ops msg_ops = {
.sendmsg = tipc_sendmsg,
.recvmsg = tipc_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage
};

static const struct proto_ops packet_ops = {
@@ -3396,7 +3395,6 @@ static const struct proto_ops packet_ops = {
.sendmsg = tipc_send_packet,
.recvmsg = tipc_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage
};

static const struct proto_ops stream_ops = {
@@ -3417,7 +3415,6 @@ static const struct proto_ops stream_ops = {
.sendmsg = tipc_sendstream,
.recvmsg = tipc_recvstream,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage
};

static const struct net_proto_family tipc_family_ops = {
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index b4b27a652ef0..1223d7e46d4a 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -758,8 +758,6 @@ static int unix_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned lon
static int unix_shutdown(struct socket *, int);
static int unix_stream_sendmsg(struct socket *, struct msghdr *, size_t);
static int unix_stream_recvmsg(struct socket *, struct msghdr *, size_t, int);
-static ssize_t unix_stream_sendpage(struct socket *, struct page *, int offset,
- size_t size, int flags);
static ssize_t unix_stream_splice_read(struct socket *, loff_t *ppos,
struct pipe_inode_info *, size_t size,
unsigned int flags);
@@ -852,7 +850,6 @@ static const struct proto_ops unix_stream_ops = {
.recvmsg = unix_stream_recvmsg,
.read_skb = unix_stream_read_skb,
.mmap = sock_no_mmap,
- .sendpage = unix_stream_sendpage,
.splice_read = unix_stream_splice_read,
.set_peek_off = unix_set_peek_off,
.show_fdinfo = unix_show_fdinfo,
@@ -878,7 +875,6 @@ static const struct proto_ops unix_dgram_ops = {
.read_skb = unix_read_skb,
.recvmsg = unix_dgram_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
.set_peek_off = unix_set_peek_off,
.show_fdinfo = unix_show_fdinfo,
};
@@ -902,7 +898,6 @@ static const struct proto_ops unix_seqpacket_ops = {
.sendmsg = unix_seqpacket_sendmsg,
.recvmsg = unix_seqpacket_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
.set_peek_off = unix_set_peek_off,
.show_fdinfo = unix_show_fdinfo,
};
@@ -1839,24 +1834,6 @@ static void maybe_add_creds(struct sk_buff *skb, const struct socket *sock,
}
}

-static int maybe_init_creds(struct scm_cookie *scm,
- struct socket *socket,
- const struct sock *other)
-{
- int err;
- struct msghdr msg = { .msg_controllen = 0 };
-
- err = scm_send(socket, &msg, scm, false);
- if (err)
- return err;
-
- if (unix_passcred_enabled(socket, other)) {
- scm->pid = get_pid(task_tgid(current));
- current_uid_gid(&scm->creds.uid, &scm->creds.gid);
- }
- return err;
-}
-
static bool unix_skb_scm_eq(struct sk_buff *skb,
struct scm_cookie *scm)
{
@@ -2349,122 +2326,6 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
return sent ? : err;
}

-static ssize_t unix_stream_sendpage(struct socket *socket, struct page *page,
- int offset, size_t size, int flags)
-{
- int err;
- bool send_sigpipe = false;
- bool init_scm = true;
- struct scm_cookie scm;
- struct sock *other, *sk = socket->sk;
- struct sk_buff *skb, *newskb = NULL, *tail = NULL;
-
- if (flags & MSG_OOB)
- return -EOPNOTSUPP;
-
- other = unix_peer(sk);
- if (!other || sk->sk_state != TCP_ESTABLISHED)
- return -ENOTCONN;
-
- if (false) {
-alloc_skb:
- unix_state_unlock(other);
- mutex_unlock(&unix_sk(other)->iolock);
- newskb = sock_alloc_send_pskb(sk, 0, 0, flags & MSG_DONTWAIT,
- &err, 0);
- if (!newskb)
- goto err;
- }
-
- /* we must acquire iolock as we modify already present
- * skbs in the sk_receive_queue and mess with skb->len
- */
- err = mutex_lock_interruptible(&unix_sk(other)->iolock);
- if (err) {
- err = flags & MSG_DONTWAIT ? -EAGAIN : -ERESTARTSYS;
- goto err;
- }
-
- if (sk->sk_shutdown & SEND_SHUTDOWN) {
- err = -EPIPE;
- send_sigpipe = true;
- goto err_unlock;
- }
-
- unix_state_lock(other);
-
- if (sock_flag(other, SOCK_DEAD) ||
- other->sk_shutdown & RCV_SHUTDOWN) {
- err = -EPIPE;
- send_sigpipe = true;
- goto err_state_unlock;
- }
-
- if (init_scm) {
- err = maybe_init_creds(&scm, socket, other);
- if (err)
- goto err_state_unlock;
- init_scm = false;
- }
-
- skb = skb_peek_tail(&other->sk_receive_queue);
- if (tail && tail == skb) {
- skb = newskb;
- } else if (!skb || !unix_skb_scm_eq(skb, &scm)) {
- if (newskb) {
- skb = newskb;
- } else {
- tail = skb;
- goto alloc_skb;
- }
- } else if (newskb) {
- /* this is fast path, we don't necessarily need to
- * call to kfree_skb even though with newskb == NULL
- * this - does no harm
- */
- consume_skb(newskb);
- newskb = NULL;
- }
-
- if (skb_append_pagefrags(skb, page, offset, size)) {
- tail = skb;
- goto alloc_skb;
- }
-
- skb->len += size;
- skb->data_len += size;
- skb->truesize += size;
- refcount_add(size, &sk->sk_wmem_alloc);
-
- if (newskb) {
- err = unix_scm_to_skb(&scm, skb, false);
- if (err)
- goto err_state_unlock;
- spin_lock(&other->sk_receive_queue.lock);
- __skb_queue_tail(&other->sk_receive_queue, newskb);
- spin_unlock(&other->sk_receive_queue.lock);
- }
-
- unix_state_unlock(other);
- mutex_unlock(&unix_sk(other)->iolock);
-
- other->sk_data_ready(other);
- scm_destroy(&scm);
- return size;
-
-err_state_unlock:
- unix_state_unlock(other);
-err_unlock:
- mutex_unlock(&unix_sk(other)->iolock);
-err:
- kfree_skb(newskb);
- if (send_sigpipe && !(flags & MSG_NOSIGNAL))
- send_sig(SIGPIPE, current, 0);
- if (!init_scm)
- scm_destroy(&scm);
- return err;
-}
-
static int unix_seqpacket_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 19aea7cba26e..d0e476755cdc 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1271,7 +1271,6 @@ static const struct proto_ops vsock_dgram_ops = {
.sendmsg = vsock_dgram_sendmsg,
.recvmsg = vsock_dgram_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static int vsock_transport_cancel_pkt(struct vsock_sock *vsk)
@@ -2186,7 +2185,6 @@ static const struct proto_ops vsock_stream_ops = {
.sendmsg = vsock_connectible_sendmsg,
.recvmsg = vsock_connectible_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
.set_rcvlowat = vsock_set_rcvlowat,
};

@@ -2208,7 +2206,6 @@ static const struct proto_ops vsock_seqpacket_ops = {
.sendmsg = vsock_connectible_sendmsg,
.recvmsg = vsock_connectible_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static int vsock_create(struct net *net, struct socket *sock,
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 5c7ad301d742..0fb5143bec7a 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1757,7 +1757,6 @@ static const struct proto_ops x25_proto_ops = {
.sendmsg = x25_sendmsg,
.recvmsg = x25_recvmsg,
.mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
};

static struct packet_type x25_packet_type __read_mostly = {
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 2ac58b282b5e..eff1f0aaa4b5 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -1386,7 +1386,6 @@ static const struct proto_ops xsk_proto_ops = {
.sendmsg = xsk_sendmsg,
.recvmsg = xsk_recvmsg,
.mmap = xsk_mmap,
- .sendpage = sock_no_sendpage,
};

static void xsk_destruct(struct sock *sk)