ctnetlink needs large socket buffer sizes. To avoid increasing
the system wide limit we would like to have something that allows
CAP_NET_ADMIN to override these limits. The first idea was to
change the SO_{SND,RCV}BUF behaviour, but since a valid way of
getting the largest possible size is to use ~0 this would possibly
break existing applications. So this patch introduces two new
socket options, SO_SNDBUFFORCE and SO_RCVBUFFORCE, that allow to
set it to any value.
[NET]: Introduce SO_{SND,RCV}BUFFORCE socket options
Allows overriding of sysctl_{wmem,rmrm}_max
SIgned-off-by: Patrick McHardy <[EMAIL PROTECTED]>
---
commit 47a1bb20a65b2786784dfaa906e617a5563f3105
tree 08db9aeee3a7045e5693776f85dbba0aa8661907
parent aa4d64d057c37bc29954789fd24dcb7018ca6973
author Patrick McHardy <[EMAIL PROTECTED]> Thu, 21 Jul 2005 02:33:07 +0200
committer Patrick McHardy <[EMAIL PROTECTED]> Thu, 21 Jul 2005 02:33:07 +0200
include/asm-alpha/socket.h | 2 ++
include/asm-arm/socket.h | 2 ++
include/asm-arm26/socket.h | 2 ++
include/asm-cris/socket.h | 2 ++
include/asm-frv/socket.h | 2 ++
include/asm-h8300/socket.h | 2 ++
include/asm-i386/socket.h | 2 ++
include/asm-ia64/socket.h | 2 ++
include/asm-m32r/socket.h | 2 ++
include/asm-m68k/socket.h | 2 ++
include/asm-mips/socket.h | 2 ++
include/asm-parisc/socket.h | 2 ++
include/asm-ppc/socket.h | 2 ++
include/asm-ppc64/socket.h | 2 ++
include/asm-s390/socket.h | 2 ++
include/asm-sh/socket.h | 2 ++
include/asm-sparc/socket.h | 2 ++
include/asm-sparc64/socket.h | 2 ++
include/asm-v850/socket.h | 2 ++
include/asm-x86_64/socket.h | 2 ++
include/asm-xtensa/socket.h | 2 ++
net/core/sock.c | 18 ++++++++++++++++--
22 files changed, 58 insertions(+), 2 deletions(-)
diff --git a/include/asm-alpha/socket.h b/include/asm-alpha/socket.h
--- a/include/asm-alpha/socket.h
+++ b/include/asm-alpha/socket.h
@@ -25,6 +25,8 @@
#define SO_ERROR 0x1007
#define SO_SNDBUF 0x1001
#define SO_RCVBUF 0x1002
+#define SO_SNDBUFFORCE 0x100a
+#define SO_RCVBUFFORCE 0x100b
#define SO_RCVLOWAT 0x1010
#define SO_SNDLOWAT 0x1011
#define SO_RCVTIMEO 0x1012
diff --git a/include/asm-arm/socket.h b/include/asm-arm/socket.h
--- a/include/asm-arm/socket.h
+++ b/include/asm-arm/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-arm26/socket.h b/include/asm-arm26/socket.h
--- a/include/asm-arm26/socket.h
+++ b/include/asm-arm26/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-cris/socket.h b/include/asm-cris/socket.h
--- a/include/asm-cris/socket.h
+++ b/include/asm-cris/socket.h
@@ -16,6 +16,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-frv/socket.h b/include/asm-frv/socket.h
--- a/include/asm-frv/socket.h
+++ b/include/asm-frv/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-h8300/socket.h b/include/asm-h8300/socket.h
--- a/include/asm-h8300/socket.h
+++ b/include/asm-h8300/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-i386/socket.h b/include/asm-i386/socket.h
--- a/include/asm-i386/socket.h
+++ b/include/asm-i386/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-ia64/socket.h b/include/asm-ia64/socket.h
--- a/include/asm-ia64/socket.h
+++ b/include/asm-ia64/socket.h
@@ -23,6 +23,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-m32r/socket.h b/include/asm-m32r/socket.h
--- a/include/asm-m32r/socket.h
+++ b/include/asm-m32r/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-m68k/socket.h b/include/asm-m68k/socket.h
--- a/include/asm-m68k/socket.h
+++ b/include/asm-m68k/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-mips/socket.h b/include/asm-mips/socket.h
--- a/include/asm-mips/socket.h
+++ b/include/asm-mips/socket.h
@@ -37,6 +37,8 @@ To add: #define SO_REUSEPORT 0x0200 /* A
#define SO_ERROR 0x1007 /* get error status and clear */
#define SO_SNDBUF 0x1001 /* Send buffer size. */
#define SO_RCVBUF 0x1002 /* Receive buffer. */
+#define SO_SNDBUFFORCE 0x100a
+#define SO_RCVBUFFORCE 0x100b
#define SO_SNDLOWAT 0x1003 /* send low-water mark */
#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
#define SO_SNDTIMEO 0x1005 /* send timeout */
diff --git a/include/asm-parisc/socket.h b/include/asm-parisc/socket.h
--- a/include/asm-parisc/socket.h
+++ b/include/asm-parisc/socket.h
@@ -16,6 +16,8 @@
/* To add :#define SO_REUSEPORT 0x0200 */
#define SO_SNDBUF 0x1001
#define SO_RCVBUF 0x1002
+#define SO_SNDBUFFORCE 0x100a
+#define SO_RCVBUFFORCE 0x100b
#define SO_SNDLOWAT 0x1003
#define SO_RCVLOWAT 0x1004
#define SO_SNDTIMEO 0x1005
diff --git a/include/asm-ppc/socket.h b/include/asm-ppc/socket.h
--- a/include/asm-ppc/socket.h
+++ b/include/asm-ppc/socket.h
@@ -20,6 +20,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-ppc64/socket.h b/include/asm-ppc64/socket.h
--- a/include/asm-ppc64/socket.h
+++ b/include/asm-ppc64/socket.h
@@ -21,6 +21,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-s390/socket.h b/include/asm-s390/socket.h
--- a/include/asm-s390/socket.h
+++ b/include/asm-s390/socket.h
@@ -22,6 +22,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-sh/socket.h b/include/asm-sh/socket.h
--- a/include/asm-sh/socket.h
+++ b/include/asm-sh/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_RCVBUFFORCE 32
+#define SO_SNDBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-sparc/socket.h b/include/asm-sparc/socket.h
--- a/include/asm-sparc/socket.h
+++ b/include/asm-sparc/socket.h
@@ -29,6 +29,8 @@
#define SO_SNDBUF 0x1001
#define SO_RCVBUF 0x1002
+#define SO_SNDBUFFORCE 0x100a
+#define SO_RCVBUFFORCE 0x100b
#define SO_ERROR 0x1007
#define SO_TYPE 0x1008
diff --git a/include/asm-sparc64/socket.h b/include/asm-sparc64/socket.h
--- a/include/asm-sparc64/socket.h
+++ b/include/asm-sparc64/socket.h
@@ -29,6 +29,8 @@
#define SO_SNDBUF 0x1001
#define SO_RCVBUF 0x1002
+#define SO_SNDBUFFORCE 0x100a
+#define SO_RCVBUFFORCE 0x100b
#define SO_ERROR 0x1007
#define SO_TYPE 0x1008
diff --git a/include/asm-v850/socket.h b/include/asm-v850/socket.h
--- a/include/asm-v850/socket.h
+++ b/include/asm-v850/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-x86_64/socket.h b/include/asm-x86_64/socket.h
--- a/include/asm-x86_64/socket.h
+++ b/include/asm-x86_64/socket.h
@@ -14,6 +14,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/include/asm-xtensa/socket.h b/include/asm-xtensa/socket.h
--- a/include/asm-xtensa/socket.h
+++ b/include/asm-xtensa/socket.h
@@ -24,6 +24,8 @@
#define SO_BROADCAST 6
#define SO_SNDBUF 7
#define SO_RCVBUF 8
+#define SO_SNDBUFFORCE 32
+#define SO_RCVBUFFORCE 33
#define SO_KEEPALIVE 9
#define SO_OOBINLINE 10
#define SO_NO_CHECK 11
diff --git a/net/core/sock.c b/net/core/sock.c
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -259,7 +259,7 @@ int sock_setsockopt(struct socket *sock,
if (val > sysctl_wmem_max)
val = sysctl_wmem_max;
-
+set_sndbuf:
sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
if ((val * 2) < SOCK_MIN_SNDBUF)
sk->sk_sndbuf = SOCK_MIN_SNDBUF;
@@ -273,6 +273,13 @@ int sock_setsockopt(struct socket *sock,
sk->sk_write_space(sk);
break;
+ case SO_SNDBUFFORCE:
+ if (!capable(CAP_NET_ADMIN)) {
+ ret = -EPERM;
+ break;
+ }
+ goto set_sndbuf;
+
case SO_RCVBUF:
/* Don't error on this BSD doesn't and if you think
about it this is right. Otherwise apps have to
@@ -281,7 +288,7 @@ int sock_setsockopt(struct socket *sock,
if (val > sysctl_rmem_max)
val = sysctl_rmem_max;
-
+set_rcvbuf:
sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
/* FIXME: is this lower bound the right one? */
if ((val * 2) < SOCK_MIN_RCVBUF)
@@ -290,6 +297,13 @@ int sock_setsockopt(struct socket *sock,
sk->sk_rcvbuf = val * 2;
break;
+ case SO_RCVBUFFORCE:
+ if (!capable(CAP_NET_ADMIN)) {
+ ret = -EPERM;
+ break;
+ }
+ goto set_rcvbuf;
+
case SO_KEEPALIVE:
#ifdef CONFIG_INET
if (sk->sk_protocol == IPPROTO_TCP)
