[NET]: Introduce SO_{SND,RCV}BUFFORCE socket options

Allows overriding of sysctl_{wmem,rmrm}_max

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

22 files changed, 58 insertions, 2 deletions

diff --git a/include/asm-alpha/socket.h b/include/asm-alpha/socket.h
index d00259d3dc78..b5193229132a 100644
--- 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
index 46d20585d951..3c51da6438c9 100644
--- 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
index 46d20585d951..3c51da6438c9 100644
--- 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
index f159b4f165f7..8b1da3e58c55 100644
--- 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
index c3be17c7de4b..7177f8b9817c 100644
--- 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
index af33b8525dcf..d98cf85bafc1 100644
--- 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
index 07f6b38ad140..802ae76195b7 100644
--- 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
index 21a9f10d6baa..a255006fb7b5 100644
--- 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
index 159519d99042..8b6680f223c0 100644
--- 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
index 8d0b9fc2d07e..f578ca4b776a 100644
--- 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
index 020b4db70ee5..d478a86294ee 100644
--- a/include/asm-mips/socket.h
+++ b/include/asm-mips/socket.h
@@ -37,6 +37,8 @@ To add: #define SO_REUSEPORT 0x0200	/* Allow local address and port reuse.  */
 #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
index 4a77996c1862..1bf54dc53c10 100644
--- 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
index 4134376b0f66..296e1a3469d0 100644
--- 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
index 59e00dfc8b8e..9e1af8eb2d96 100644
--- 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
index 0e96eeca4e6b..15a5298c8744 100644
--- 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
index dde696c3b4c7..553904ff9336 100644
--- 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
index c1154e3ecfdf..09575b608adb 100644
--- 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
index 865547a23908..59987dad3359 100644
--- 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
index 213b852af53e..0240d366a0a4 100644
--- 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
index d9a252ea8210..f2cdbeae5d5b 100644
--- 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
index daccd05a14cd..00f83f3a6d72 100644
--- 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
index 12f6d9a2a522..51a5e7ddee85 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -260,7 +260,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
                            
                         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;
@@ -274,6 +274,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
                         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
@@ -282,7 +289,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
                           
                         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)
@@ -291,6 +298,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
                                 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)