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Date: Wed, 31 Oct 2018 16:26:34 -0700
From: Christoph Paasch <cpaasch@...le.com>
To: netdev@...r.kernel.org
Cc: Ian Swett <ianswett@...gle.com>,
Leif Hedstrom <lhedstrom@...le.com>,
Jana Iyengar <jri.ietf@...il.com>
Subject: [RFC 1/2] net: Add new socket-option SO_DELAYED_BIND
And store it as a flag in the sk_flags.
Signed-off-by: Christoph Paasch <cpaasch@...le.com>
---
arch/alpha/include/uapi/asm/socket.h | 2 ++
arch/ia64/include/uapi/asm/socket.h | 2 ++
arch/mips/include/uapi/asm/socket.h | 2 ++
arch/parisc/include/uapi/asm/socket.h | 2 ++
arch/s390/include/uapi/asm/socket.h | 2 ++
arch/sparc/include/uapi/asm/socket.h | 2 ++
arch/xtensa/include/uapi/asm/socket.h | 2 ++
include/net/sock.h | 1 +
include/uapi/asm-generic/socket.h | 2 ++
net/core/sock.c | 21 +++++++++++++++++++++
10 files changed, 38 insertions(+)
diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 065fb372e355..add6aca13b53 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -115,4 +115,6 @@
#define SO_TXTIME 61
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 62
+
#endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/ia64/include/uapi/asm/socket.h b/arch/ia64/include/uapi/asm/socket.h
index c872c4e6bafb..98a86f406601 100644
--- a/arch/ia64/include/uapi/asm/socket.h
+++ b/arch/ia64/include/uapi/asm/socket.h
@@ -117,4 +117,6 @@
#define SO_TXTIME 61
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 62
+
#endif /* _ASM_IA64_SOCKET_H */
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index 71370fb3ceef..f84bd74d58ee 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -126,4 +126,6 @@
#define SO_TXTIME 61
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 62
+
#endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index 061b9cf2a779..8fe20a7abf6e 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -107,4 +107,6 @@
#define SO_TXTIME 0x4036
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 0x4037
+
#endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/s390/include/uapi/asm/socket.h b/arch/s390/include/uapi/asm/socket.h
index 39d901476ee5..c00b10909a72 100644
--- a/arch/s390/include/uapi/asm/socket.h
+++ b/arch/s390/include/uapi/asm/socket.h
@@ -114,4 +114,6 @@
#define SO_TXTIME 61
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 62
+
#endif /* _ASM_SOCKET_H */
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index 7ea35e5601b6..0825db0c9f46 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -104,6 +104,8 @@
#define SO_TXTIME 0x003f
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 0x0040
+
/* Security levels - as per NRL IPv6 - don't actually do anything */
#define SO_SECURITY_AUTHENTICATION 0x5001
#define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002
diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h
index 1de07a7f7680..cd4d91e982d5 100644
--- a/arch/xtensa/include/uapi/asm/socket.h
+++ b/arch/xtensa/include/uapi/asm/socket.h
@@ -119,4 +119,6 @@
#define SO_TXTIME 61
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 62
+
#endif /* _XTENSA_SOCKET_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index f665d74ae509..16fbe54cf519 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -801,6 +801,7 @@ enum sock_flags {
SOCK_RCU_FREE, /* wait rcu grace period in sk_destruct() */
SOCK_TXTIME,
SOCK_XDP, /* XDP is attached */
+ SOCK_DELAYED_BIND,
};
#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index a12692e5f7a8..653f1f65a311 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -110,4 +110,6 @@
#define SO_TXTIME 61
#define SCM_TXTIME SO_TXTIME
+#define SO_DELAYED_BIND 62
+
#endif /* __ASM_GENERIC_SOCKET_H */
diff --git a/net/core/sock.c b/net/core/sock.c
index 6fcc4bc07d19..343baa820cf2 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1047,6 +1047,23 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
}
break;
+ case SO_DELAYED_BIND:
+ if (sk->sk_family == PF_INET || sk->sk_family == PF_INET6) {
+ if (sk->sk_protocol != IPPROTO_UDP)
+ ret = -ENOTSUPP;
+ } else {
+ ret = -ENOTSUPP;
+ }
+
+ if (!ret) {
+ if (val < 0 || val > 1)
+ ret = -EINVAL;
+ else
+ sock_valbool_flag(sk, SOCK_DELAYED_BIND, valbool);
+ }
+
+ break;
+
default:
ret = -ENOPROTOOPT;
break;
@@ -1391,6 +1408,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
SOF_TXTIME_REPORT_ERRORS : 0;
break;
+ case SO_DELAYED_BIND:
+ v.val = sock_flag(sk, SOCK_DELAYED_BIND);
+ break;
+
default:
/* We implement the SO_SNDLOWAT etc to not be settable
* (1003.1g 7).
--
2.16.2
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