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authorOliver Hartkopp <socketcan@hartkopp.net>2022-04-11 14:49:55 +0200
committerPaolo Abeni <pabeni@redhat.com>2022-04-12 15:00:25 +0200
commitec095263a965720e1ca39db1d9c5cd47846c789b (patch)
treef88e25dfa22ee4da19c1cba18eac627aec42aebb
parentf01598090048f5f732ea7aa64b2f194131ce60d2 (diff)
net: remove noblock parameter from recvmsg() entities
The internal recvmsg() functions have two parameters 'flags' and 'noblock' that were merged inside skb_recv_datagram(). As a follow up patch to commit f4b41f062c42 ("net: remove noblock parameter from skb_recv_datagram()") this patch removes the separate 'noblock' parameter for recvmsg(). Analogue to the referenced patch for skb_recv_datagram() the 'flags' and 'noblock' parameters are unnecessarily split up with e.g. err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT, flags & ~MSG_DONTWAIT, &addr_len); or in err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udp_recvmsg, sk, msg, size, flags & MSG_DONTWAIT, flags & ~MSG_DONTWAIT, &addr_len); instead of simply using only flags all the time and check for MSG_DONTWAIT where needed (to preserve for the formerly separated no(n)block condition). Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Link: https://lore.kernel.org/r/20220411124955.154876-1-socketcan@hartkopp.net Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-rw-r--r--drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h2
-rw-r--r--drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c22
-rw-r--r--include/net/ping.h2
-rw-r--r--include/net/sctp/sctp.h2
-rw-r--r--include/net/sock.h3
-rw-r--r--include/net/tcp.h2
-rw-r--r--include/net/tls.h2
-rw-r--r--include/net/udp.h8
-rw-r--r--net/core/sock.c3
-rw-r--r--net/dccp/dccp.h4
-rw-r--r--net/dccp/proto.c6
-rw-r--r--net/ieee802154/socket.c6
-rw-r--r--net/ipv4/af_inet.c5
-rw-r--r--net/ipv4/ping.c5
-rw-r--r--net/ipv4/raw.c3
-rw-r--r--net/ipv4/tcp.c19
-rw-r--r--net/ipv4/tcp_bpf.c15
-rw-r--r--net/ipv4/udp.c11
-rw-r--r--net/ipv4/udp_bpf.c17
-rw-r--r--net/ipv4/udp_impl.h4
-rw-r--r--net/ipv6/af_inet6.c5
-rw-r--r--net/ipv6/raw.c3
-rw-r--r--net/ipv6/udp.c4
-rw-r--r--net/ipv6/udp_impl.h4
-rw-r--r--net/l2tp/l2tp_ip.c3
-rw-r--r--net/l2tp/l2tp_ip6.c3
-rw-r--r--net/mptcp/protocol.c4
-rw-r--r--net/phonet/datagram.c3
-rw-r--r--net/phonet/pep.c3
-rw-r--r--net/sctp/socket.c16
-rw-r--r--net/sctp/ulpevent.c2
-rw-r--r--net/sunrpc/svcsock.c2
-rw-r--r--net/sunrpc/xprtsock.c2
-rw-r--r--net/tls/tls_sw.c3
-rw-r--r--net/unix/af_unix.c6
-rw-r--r--net/unix/unix_bpf.c5
-rw-r--r--net/xfrm/espintcp.c4
37 files changed, 91 insertions, 122 deletions
diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h
index 9e2378013642..41714203ace8 100644
--- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h
+++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h
@@ -567,7 +567,7 @@ void chtls_shutdown(struct sock *sk, int how);
void chtls_destroy_sock(struct sock *sk);
int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
int chtls_recvmsg(struct sock *sk, struct msghdr *msg,
- size_t len, int nonblock, int flags, int *addr_len);
+ size_t len, int flags, int *addr_len);
int chtls_sendpage(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
int send_tx_flowc_wr(struct sock *sk, int compl,
diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
index c320cc8ca68d..539992dad8ba 100644
--- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
+++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
@@ -1426,7 +1426,7 @@ static void chtls_cleanup_rbuf(struct sock *sk, int copied)
}
static int chtls_pt_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
struct chtls_hws *hws = &csk->tlshws;
@@ -1441,7 +1441,7 @@ static int chtls_pt_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
buffers_freed = 0;
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (unlikely(csk_flag(sk, CSK_UPDATE_RCV_WND)))
@@ -1616,7 +1616,7 @@ skip_copy:
* Peek at data in a socket's receive buffer.
*/
static int peekmsg(struct sock *sk, struct msghdr *msg,
- size_t len, int nonblock, int flags)
+ size_t len, int flags)
{
struct tcp_sock *tp = tcp_sk(sk);
u32 peek_seq, offset;
@@ -1626,7 +1626,7 @@ static int peekmsg(struct sock *sk, struct msghdr *msg,
long timeo;
lock_sock(sk);
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
peek_seq = tp->copied_seq;
do {
@@ -1737,7 +1737,7 @@ found_ok_skb:
}
int chtls_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct tcp_sock *tp = tcp_sk(sk);
struct chtls_sock *csk;
@@ -1750,25 +1750,23 @@ int chtls_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
buffers_freed = 0;
if (unlikely(flags & MSG_OOB))
- return tcp_prot.recvmsg(sk, msg, len, nonblock, flags,
- addr_len);
+ return tcp_prot.recvmsg(sk, msg, len, flags, addr_len);
if (unlikely(flags & MSG_PEEK))
- return peekmsg(sk, msg, len, nonblock, flags);
+ return peekmsg(sk, msg, len, flags);
if (sk_can_busy_loop(sk) &&
skb_queue_empty_lockless(&sk->sk_receive_queue) &&
sk->sk_state == TCP_ESTABLISHED)
- sk_busy_loop(sk, nonblock);
+ sk_busy_loop(sk, flags & MSG_DONTWAIT);
lock_sock(sk);
csk = rcu_dereference_sk_user_data(sk);
if (is_tls_rx(csk))
- return chtls_pt_recvmsg(sk, msg, len, nonblock,
- flags, addr_len);
+ return chtls_pt_recvmsg(sk, msg, len, flags, addr_len);
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (unlikely(csk_flag(sk, CSK_UPDATE_RCV_WND)))
diff --git a/include/net/ping.h b/include/net/ping.h
index b68fbfdb606f..e4ff3911cbf5 100644
--- a/include/net/ping.h
+++ b/include/net/ping.h
@@ -71,7 +71,7 @@ void ping_err(struct sk_buff *skb, int offset, u32 info);
int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
struct sk_buff *);
-int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
+int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int flags, int *addr_len);
int ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
void *user_icmph, size_t icmph_len);
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index bf3716fe83e0..a04999ee99b0 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -103,7 +103,7 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
struct sctp_association *asoc);
extern struct percpu_counter sctp_sockets_allocated;
int sctp_asconf_mgmt(struct sctp_sock *, struct sctp_sockaddr_entry *);
-struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int, int *);
+struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int *);
typedef int (*sctp_callback_t)(struct sctp_endpoint *, struct sctp_transport *, void *);
void sctp_transport_walk_start(struct rhashtable_iter *iter);
diff --git a/include/net/sock.h b/include/net/sock.h
index 1a988e605f09..a01d6c421aa2 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1202,8 +1202,7 @@ struct proto {
int (*sendmsg)(struct sock *sk, struct msghdr *msg,
size_t len);
int (*recvmsg)(struct sock *sk, struct msghdr *msg,
- size_t len, int noblock, int flags,
- int *addr_len);
+ 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,
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6d50a662bf89..679b1964d494 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -407,7 +407,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
unsigned int optlen);
void tcp_set_keepalive(struct sock *sk, int val);
void tcp_syn_ack_timeout(const struct request_sock *req);
-int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
+int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int flags, int *addr_len);
int tcp_set_rcvlowat(struct sock *sk, int val);
int tcp_set_window_clamp(struct sock *sk, int val);
diff --git a/include/net/tls.h b/include/net/tls.h
index 6fe78361c8c8..b59f0a63292b 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -371,7 +371,7 @@ void tls_sw_free_resources_rx(struct sock *sk);
void tls_sw_release_resources_rx(struct sock *sk);
void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len);
+ int flags, int *addr_len);
bool tls_sw_sock_is_readable(struct sock *sk);
ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
struct pipe_inode_info *pipe,
diff --git a/include/net/udp.h b/include/net/udp.h
index f1c2a88c9005..b83a00330566 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -250,14 +250,14 @@ void udp_destruct_sock(struct sock *sk);
void skb_consume_udp(struct sock *sk, struct sk_buff *skb, int len);
int __udp_enqueue_schedule_skb(struct sock *sk, struct sk_buff *skb);
void udp_skb_destructor(struct sock *sk, struct sk_buff *skb);
-struct sk_buff *__skb_recv_udp(struct sock *sk, unsigned int flags,
- int noblock, int *off, int *err);
+struct sk_buff *__skb_recv_udp(struct sock *sk, unsigned int flags, int *off,
+ int *err);
static inline struct sk_buff *skb_recv_udp(struct sock *sk, unsigned int flags,
- int noblock, int *err)
+ int *err)
{
int off = 0;
- return __skb_recv_udp(sk, flags, noblock, &off, err);
+ return __skb_recv_udp(sk, flags, &off, err);
}
int udp_v4_early_demux(struct sk_buff *skb);
diff --git a/net/core/sock.c b/net/core/sock.c
index 05e0cfa064b6..29abec3eabd8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -3506,8 +3506,7 @@ int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int addr_len = 0;
int err;
- err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT,
- flags & ~MSG_DONTWAIT, &addr_len);
+ err = sk->sk_prot->recvmsg(sk, msg, size, flags, &addr_len);
if (err >= 0)
msg->msg_namelen = addr_len;
return err;
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 671c377f0889..7dfc00c9fb32 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -293,8 +293,8 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen);
int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
-int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
- int flags, int *addr_len);
+int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len);
void dccp_shutdown(struct sock *sk, int how);
int inet_dccp_listen(struct socket *sock, int backlog);
__poll_t dccp_poll(struct file *file, struct socket *sock,
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index a976b4d29892..58421f94427e 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -791,8 +791,8 @@ out_discard:
EXPORT_SYMBOL_GPL(dccp_sendmsg);
-int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
- int flags, int *addr_len)
+int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len)
{
const struct dccp_hdr *dh;
long timeo;
@@ -804,7 +804,7 @@ int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
goto out;
}
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
do {
struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index a725dd9bbda8..f24852814fa3 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -308,13 +308,12 @@ out:
}
static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
size_t copied = 0;
int err = -EOPNOTSUPP;
struct sk_buff *skb;
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
@@ -696,7 +695,7 @@ out:
}
static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
size_t copied = 0;
int err = -EOPNOTSUPP;
@@ -704,7 +703,6 @@ static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
struct dgram_sock *ro = dgram_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 72fde2888ad2..195ecfa2f000 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -836,7 +836,7 @@ ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
EXPORT_SYMBOL(inet_sendpage);
INDIRECT_CALLABLE_DECLARE(int udp_recvmsg(struct sock *, struct msghdr *,
- size_t, int, int, int *));
+ size_t, int, int *));
int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int flags)
{
@@ -848,8 +848,7 @@ int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
sock_rps_record_flow(sk);
err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udp_recvmsg,
- sk, msg, size, flags & MSG_DONTWAIT,
- flags & ~MSG_DONTWAIT, &addr_len);
+ sk, msg, size, flags, &addr_len);
if (err >= 0)
msg->msg_namelen = addr_len;
return err;
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 2897fcf71211..319c181bfbb6 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -844,8 +844,8 @@ do_confirm:
goto out;
}
-int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
- int flags, int *addr_len)
+int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len)
{
struct inet_sock *isk = inet_sk(sk);
int family = sk->sk_family;
@@ -861,7 +861,6 @@ int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
if (flags & MSG_ERRQUEUE)
return inet_recv_error(sk, msg, len, addr_len);
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index c9dd9603f2e7..4056b0da85ea 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -753,7 +753,7 @@ out:
*/
static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct inet_sock *inet = inet_sk(sk);
size_t copied = 0;
@@ -769,7 +769,6 @@ static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
goto out;
}
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index e31cf137c614..e20b87b3bf90 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1877,8 +1877,7 @@ static void tcp_zerocopy_set_hint_for_skb(struct sock *sk,
}
static int tcp_recvmsg_locked(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags,
- struct scm_timestamping_internal *tss,
+ int flags, struct scm_timestamping_internal *tss,
int *cmsg_flags);
static int receive_fallback_to_copy(struct sock *sk,
struct tcp_zerocopy_receive *zc, int inq,
@@ -1900,7 +1899,7 @@ static int receive_fallback_to_copy(struct sock *sk,
if (err)
return err;
- err = tcp_recvmsg_locked(sk, &msg, inq, /*nonblock=*/1, /*flags=*/0,
+ err = tcp_recvmsg_locked(sk, &msg, inq, MSG_DONTWAIT,
tss, &zc->msg_flags);
if (err < 0)
return err;
@@ -2316,8 +2315,7 @@ static int tcp_inq_hint(struct sock *sk)
*/
static int tcp_recvmsg_locked(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags,
- struct scm_timestamping_internal *tss,
+ int flags, struct scm_timestamping_internal *tss,
int *cmsg_flags)
{
struct tcp_sock *tp = tcp_sk(sk);
@@ -2337,7 +2335,7 @@ static int tcp_recvmsg_locked(struct sock *sk, struct msghdr *msg, size_t len,
if (tp->recvmsg_inq)
*cmsg_flags = TCP_CMSG_INQ;
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
/* Urgent data needs to be handled specially. */
if (flags & MSG_OOB)
@@ -2556,8 +2554,8 @@ recv_sndq:
goto out;
}
-int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
- int flags, int *addr_len)
+int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len)
{
int cmsg_flags = 0, ret, inq;
struct scm_timestamping_internal tss;
@@ -2568,11 +2566,10 @@ int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
if (sk_can_busy_loop(sk) &&
skb_queue_empty_lockless(&sk->sk_receive_queue) &&
sk->sk_state == TCP_ESTABLISHED)
- sk_busy_loop(sk, nonblock);
+ sk_busy_loop(sk, flags & MSG_DONTWAIT);
lock_sock(sk);
- ret = tcp_recvmsg_locked(sk, msg, len, nonblock, flags, &tss,
- &cmsg_flags);
+ ret = tcp_recvmsg_locked(sk, msg, len, flags, &tss, &cmsg_flags);
release_sock(sk);
sk_defer_free_flush(sk);
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 1cdcb4df0eb7..be3947e70fec 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -174,7 +174,6 @@ static int tcp_msg_wait_data(struct sock *sk, struct sk_psock *psock,
static int tcp_bpf_recvmsg_parser(struct sock *sk,
struct msghdr *msg,
size_t len,
- int nonblock,
int flags,
int *addr_len)
{
@@ -186,7 +185,7 @@ static int tcp_bpf_recvmsg_parser(struct sock *sk,
psock = sk_psock_get(sk);
if (unlikely(!psock))
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ return tcp_recvmsg(sk, msg, len, flags, addr_len);
lock_sock(sk);
msg_bytes_ready:
@@ -211,7 +210,7 @@ msg_bytes_ready:
goto out;
}
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
if (!timeo) {
copied = -EAGAIN;
goto out;
@@ -234,7 +233,7 @@ out:
}
static int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct sk_psock *psock;
int copied, ret;
@@ -244,11 +243,11 @@ static int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
psock = sk_psock_get(sk);
if (unlikely(!psock))
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ return tcp_recvmsg(sk, msg, len, flags, addr_len);
if (!skb_queue_empty(&sk->sk_receive_queue) &&
sk_psock_queue_empty(psock)) {
sk_psock_put(sk, psock);
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ return tcp_recvmsg(sk, msg, len, flags, addr_len);
}
lock_sock(sk);
msg_bytes_ready:
@@ -257,14 +256,14 @@ msg_bytes_ready:
long timeo;
int data;
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
data = tcp_msg_wait_data(sk, psock, timeo);
if (data) {
if (!sk_psock_queue_empty(psock))
goto msg_bytes_ready;
release_sock(sk);
sk_psock_put(sk, psock);
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ return tcp_recvmsg(sk, msg, len, flags, addr_len);
}
copied = -EAGAIN;
}
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 6b4d8361560f..aa8545ca6964 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1726,7 +1726,7 @@ int udp_ioctl(struct sock *sk, int cmd, unsigned long arg)
EXPORT_SYMBOL(udp_ioctl);
struct sk_buff *__skb_recv_udp(struct sock *sk, unsigned int flags,
- int noblock, int *off, int *err)
+ int *off, int *err)
{
struct sk_buff_head *sk_queue = &sk->sk_receive_queue;
struct sk_buff_head *queue;
@@ -1735,7 +1735,6 @@ struct sk_buff *__skb_recv_udp(struct sock *sk, unsigned int flags,
int error;
queue = &udp_sk(sk)->reader_queue;
- flags |= noblock ? MSG_DONTWAIT : 0;
timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
do {
struct sk_buff *skb;
@@ -1805,7 +1804,7 @@ int udp_read_sock(struct sock *sk, read_descriptor_t *desc,
struct sk_buff *skb;
int err, used;
- skb = skb_recv_udp(sk, 0, 1, &err);
+ skb = skb_recv_udp(sk, MSG_DONTWAIT, &err);
if (!skb)
return err;
@@ -1843,8 +1842,8 @@ EXPORT_SYMBOL(udp_read_sock);
* return it, otherwise we block.
*/
-int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
- int flags, int *addr_len)
+int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len)
{
struct inet_sock *inet = inet_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
@@ -1859,7 +1858,7 @@ int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
try_again:
off = sk_peek_offset(sk, flags);
- skb = __skb_recv_udp(sk, flags, noblock, &off, &err);
+ skb = __skb_recv_udp(sk, flags, &off, &err);
if (!skb)
return err;
diff --git a/net/ipv4/udp_bpf.c b/net/ipv4/udp_bpf.c
index bbe6569c9ad3..ff15918b7bdc 100644
--- a/net/ipv4/udp_bpf.c
+++ b/net/ipv4/udp_bpf.c
@@ -11,14 +11,13 @@
static struct proto *udpv6_prot_saved __read_mostly;
static int sk_udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6)
- return udpv6_prot_saved->recvmsg(sk, msg, len, noblock, flags,
- addr_len);
+ return udpv6_prot_saved->recvmsg(sk, msg, len, flags, addr_len);
#endif
- return udp_prot.recvmsg(sk, msg, len, noblock, flags, addr_len);
+ return udp_prot.recvmsg(sk, msg, len, flags, addr_len);
}
static bool udp_sk_has_data(struct sock *sk)
@@ -61,7 +60,7 @@ static int udp_msg_wait_data(struct sock *sk, struct sk_psock *psock,
}
static int udp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct sk_psock *psock;
int copied, ret;
@@ -71,10 +70,10 @@ static int udp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
psock = sk_psock_get(sk);
if (unlikely(!psock))
- return sk_udp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ return sk_udp_recvmsg(sk, msg, len, flags, addr_len);
if (!psock_has_data(psock)) {
- ret = sk_udp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ ret = sk_udp_recvmsg(sk, msg, len, flags, addr_len);
goto out;
}
@@ -84,12 +83,12 @@ msg_bytes_ready:
long timeo;
int data;
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
data = udp_msg_wait_data(sk, psock, timeo);
if (data) {
if (psock_has_data(psock))
goto msg_bytes_ready;
- ret = sk_udp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ ret = sk_udp_recvmsg(sk, msg, len, flags, addr_len);
goto out;
}
copied = -EAGAIN;
diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
index 2878d8285caf..4ba7a88a1b1d 100644
--- a/net/ipv4/udp_impl.h
+++ b/net/ipv4/udp_impl.h
@@ -17,8 +17,8 @@ int udp_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
int udp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
-int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
- int flags, int *addr_len);
+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);
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 7d7b7523d126..6595a78672c8 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -654,7 +654,7 @@ int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
}
INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
- size_t, int, int, int *));
+ size_t, int, int *));
int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int flags)
{
@@ -669,8 +669,7 @@ int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
/* IPV6_ADDRFORM can change sk->sk_prot under us. */
prot = READ_ONCE(sk->sk_prot);
err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
- sk, msg, size, flags & MSG_DONTWAIT,
- flags & ~MSG_DONTWAIT, &addr_len);
+ sk, msg, size, flags, &addr_len);
if (err >= 0)
msg->msg_namelen = addr_len;
return err;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 8bb41f3b246a..0d7c13d33d1a 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -460,7 +460,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
*/
static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
@@ -477,7 +477,6 @@ static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (np->rxpmtu && np->rxopt.bits.rxpmtu)
return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 7f0fa9bd9ffe..db9449b52dbe 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -322,7 +322,7 @@ static int udp6_skb_len(struct sk_buff *skb)
*/
int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct inet_sock *inet = inet_sk(sk);
@@ -342,7 +342,7 @@ int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
try_again:
off = sk_peek_offset(sk, flags);
- skb = __skb_recv_udp(sk, flags, noblock, &off, &err);
+ skb = __skb_recv_udp(sk, flags, &off, &err);
if (!skb)
return err;
diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
index b2fcc46c1630..4251e49d32a0 100644
--- a/net/ipv6/udp_impl.h
+++ b/net/ipv6/udp_impl.h
@@ -20,8 +20,8 @@ int udpv6_getsockopt(struct sock *sk, int level, int optname,
int udpv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
unsigned int optlen);
int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len);
-int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
- int flags, int *addr_len);
+int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len);
void udpv6_destroy_sock(struct sock *sk);
#ifdef CONFIG_PROC_FS
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index c6a5cc2d88e7..6af09e188e52 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -515,7 +515,7 @@ no_route:
}
static int l2tp_ip_recvmsg(struct sock *sk, struct msghdr *msg,
- size_t len, int noblock, int flags, int *addr_len)
+ size_t len, int flags, int *addr_len)
{
struct inet_sock *inet = inet_sk(sk);
size_t copied = 0;
@@ -526,7 +526,6 @@ static int l2tp_ip_recvmsg(struct sock *sk, struct msghdr *msg,
if (flags & MSG_OOB)
goto out;
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index 97fde8a9209b..217c7192691e 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -657,7 +657,7 @@ do_confirm:
}
static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_l2tpip6 *, lsa, msg->msg_name);
@@ -671,7 +671,6 @@ static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
if (flags & MSG_ERRQUEUE)
return ipv6_recv_error(sk, msg, len, addr_len);
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 8f54293c1d88..0492aa9308c7 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -2012,7 +2012,7 @@ static unsigned int mptcp_inq_hint(const struct sock *sk)
}
static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct mptcp_sock *msk = mptcp_sk(sk);
struct scm_timestamping_internal tss;
@@ -2030,7 +2030,7 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
goto out_err;
}
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
len = min_t(size_t, len, INT_MAX);
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
index 3f2e62b63dd4..ff5f49ab236e 100644
--- a/net/phonet/datagram.c
+++ b/net/phonet/datagram.c
@@ -112,7 +112,7 @@ static int pn_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
}
static int pn_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct sk_buff *skb = NULL;
struct sockaddr_pn sa;
@@ -123,7 +123,6 @@ static int pn_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
MSG_CMSG_COMPAT))
goto out_nofree;
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &rval);
if (skb == NULL)
goto out_nofree;
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index 441a26706592..83ea13a50690 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -1239,7 +1239,7 @@ struct sk_buff *pep_read(struct sock *sk)
}
static int pep_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct sk_buff *skb;
int err;
@@ -1268,7 +1268,6 @@ static int pep_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
return -EINVAL;
}
- flags |= (noblock ? MSG_DONTWAIT : 0);
skb = skb_recv_datagram(sk, flags, &err);
lock_sock(sk);
if (skb == NULL) {
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 3e1a9600be5e..4c7865f14064 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2084,7 +2084,7 @@ static int sctp_skb_pull(struct sk_buff *skb, int len)
* 5 for complete description of the flags.
*/
static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int noblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct sctp_ulpevent *event = NULL;
struct sctp_sock *sp = sctp_sk(sk);
@@ -2093,9 +2093,8 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int err = 0;
int skb_len;
- pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
- "addr_len:%p)\n", __func__, sk, msg, len, noblock, flags,
- addr_len);
+ pr_debug("%s: sk:%p, msghdr:%p, len:%zd, flags:0x%x, addr_len:%p)\n",
+ __func__, sk, msg, len, flags, addr_len);
lock_sock(sk);
@@ -2105,7 +2104,7 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
goto out;
}
- skb = sctp_skb_recv_datagram(sk, flags, noblock, &err);
+ skb = sctp_skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
@@ -8978,14 +8977,13 @@ out:
* Note: This is pretty much the same routine as in core/datagram.c
* with a few changes to make lksctp work.
*/
-struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
- int noblock, int *err)
+struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags, int *err)
{
int error;
struct sk_buff *skb;
long timeo;
- timeo = sock_rcvtimeo(sk, noblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
MAX_SCHEDULE_TIMEOUT);
@@ -9018,7 +9016,7 @@ struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
break;
if (sk_can_busy_loop(sk)) {
- sk_busy_loop(sk, noblock);
+ sk_busy_loop(sk, flags & MSG_DONTWAIT);
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
continue;
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 0c3d2b4d7321..8920ca92a011 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -1063,7 +1063,7 @@ void sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
struct sk_buff *skb;
int err;
- skb = sctp_skb_recv_datagram(sk, MSG_PEEK, 1, &err);
+ skb = sctp_skb_recv_datagram(sk, MSG_PEEK | MSG_DONTWAIT, &err);
if (skb != NULL) {
__sctp_ulpevent_read_nxtinfo(sctp_skb2event(skb),
msghdr, skb);
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 478f857cdaed..a21f5684345f 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -464,7 +464,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp)
0, 0, MSG_PEEK | MSG_DONTWAIT);
if (err < 0)
goto out_recv_err;
- skb = skb_recv_udp(svsk->sk_sk, 0, 1, &err);
+ skb = skb_recv_udp(svsk->sk_sk, MSG_DONTWAIT, &err);
if (!skb)
goto out_recv_err;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 78af7518f263..d11aa2b7c532 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1337,7 +1337,7 @@ static void xs_udp_data_receive(struct sock_xprt *transport)
if (sk == NULL)
goto out;
for (;;) {
- skb = skb_recv_udp(sk, 0, 1, &err);
+ skb = skb_recv_udp(sk, MSG_DONTWAIT, &err);
if (skb == NULL)
break;
xs_udp_data_read_skb(&transport->xprt, sk, skb);
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 2e8a896af81a..17c4e236ec8b 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1722,7 +1722,6 @@ static int process_rx_list(struct tls_sw_context_rx *ctx,
int tls_sw_recvmsg(struct sock *sk,
struct msghdr *msg,
size_t len,
- int nonblock,
int flags,
int *addr_len)
{
@@ -1744,8 +1743,6 @@ int tls_sw_recvmsg(struct sock *sk,
bool bpf_strp_enabled;
bool zc_capable;
- flags |= nonblock;
-
if (unlikely(flags & MSG_ERRQUEUE))
return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR);
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index fecbd95da918..e1dd9e9c8452 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2484,8 +2484,7 @@ static int unix_dgram_recvmsg(struct socket *sock, struct msghdr *msg, size_t si
const struct proto *prot = READ_ONCE(sk->sk_prot);
if (prot != &unix_dgram_proto)
- return prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT,
- flags & ~MSG_DONTWAIT, NULL);
+ return prot->recvmsg(sk, msg, size, flags, NULL);
#endif
return __unix_dgram_recvmsg(sk, msg, size, flags);
}
@@ -2917,8 +2916,7 @@ static int unix_stream_recvmsg(struct socket *sock, struct msghdr *msg,
const struct proto *prot = READ_ONCE(sk->sk_prot);
if (prot != &unix_stream_proto)
- return prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT,
- flags & ~MSG_DONTWAIT, NULL);
+ return prot->recvmsg(sk, msg, size, flags, NULL);
#endif
return unix_stream_read_generic(&state, true);
}
diff --git a/net/unix/unix_bpf.c b/net/unix/unix_bpf.c
index 452376c6f419..7cf14c6b1725 100644
--- a/net/unix/unix_bpf.c
+++ b/net/unix/unix_bpf.c
@@ -48,8 +48,7 @@ static int __unix_recvmsg(struct sock *sk, struct msghdr *msg,
}
static int unix_bpf_recvmsg(struct sock *sk, struct msghdr *msg,
- size_t len, int nonblock, int flags,
- int *addr_len)
+ size_t len, int flags, int *addr_len)
{
struct unix_sock *u = unix_sk(sk);
struct sk_psock *psock;
@@ -73,7 +72,7 @@ msg_bytes_ready:
long timeo;
int data;
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
data = unix_msg_wait_data(sk, psock, timeo);
if (data) {
if (!sk_psock_queue_empty(psock))
diff --git a/net/xfrm/espintcp.c b/net/xfrm/espintcp.c
index 1f08ebf7d80c..82d14eea1b5a 100644
--- a/net/xfrm/espintcp.c
+++ b/net/xfrm/espintcp.c
@@ -131,7 +131,7 @@ static int espintcp_parse(struct strparser *strp, struct sk_buff *skb)
}
static int espintcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
+ int flags, int *addr_len)
{
struct espintcp_ctx *ctx = espintcp_getctx(sk);
struct sk_buff *skb;
@@ -139,8 +139,6 @@ static int espintcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int copied;
int off = 0;
- flags |= nonblock ? MSG_DONTWAIT : 0;
-
skb = __skb_recv_datagram(sk, &ctx->ike_queue, flags, &off, &err);
if (!skb) {
if (err == -EAGAIN && sk->sk_shutdown & RCV_SHUTDOWN)