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New getsockopt option to get socket cookie

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Introduce a new getsockopt operation to retrieve the socket cookie
for a specific socket based on the socket fd.  It returns a unique
non-decreasing cookie for each socket.
Tested: https://android-review.googlesource.com/#/c/358163/

Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chenbo Feng 2017-04-05 19:00:55 -07:00 committed by David S. Miller
parent c42cb98cfd
commit 5daab9db7b
14 changed files with 34 additions and 0 deletions
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2
arch/alpha/include/uapi/asm/socket.h
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@ -103,4 +103,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _UAPI_ASM_SOCKET_H */

2
arch/avr32/include/uapi/asm/socket.h
View File

@ -96,4 +96,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _UAPI__ASM_AVR32_SOCKET_H */

2
arch/frv/include/uapi/asm/socket.h
View File

@ -96,5 +96,7 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _ASM_SOCKET_H */

2
arch/ia64/include/uapi/asm/socket.h
View File

@ -105,4 +105,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _ASM_IA64_SOCKET_H */

2
arch/m32r/include/uapi/asm/socket.h
View File

@ -96,4 +96,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _ASM_M32R_SOCKET_H */

2
arch/mips/include/uapi/asm/socket.h
View File

@ -114,4 +114,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _UAPI_ASM_SOCKET_H */

2
arch/mn10300/include/uapi/asm/socket.h
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@ -96,4 +96,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _ASM_SOCKET_H */

2
arch/parisc/include/uapi/asm/socket.h
View File

@ -95,4 +95,6 @@
#define SO_INCOMING_NAPI_ID 0x4031
#define SO_COOKIE 0x4032
#endif /* _UAPI_ASM_SOCKET_H */

2
arch/powerpc/include/uapi/asm/socket.h
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@ -103,4 +103,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _ASM_POWERPC_SOCKET_H */

2
arch/s390/include/uapi/asm/socket.h
View File

@ -102,4 +102,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _ASM_SOCKET_H */

2
arch/sparc/include/uapi/asm/socket.h
View File

@ -92,6 +92,8 @@
#define SO_INCOMING_NAPI_ID 0x003a
#define SO_COOKIE 0x003b
/* Security levels - as per NRL IPv6 - don't actually do anything */
#define SO_SECURITY_AUTHENTICATION 0x5001
#define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002

2
arch/xtensa/include/uapi/asm/socket.h
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@ -107,4 +107,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* _XTENSA_SOCKET_H */

2
include/uapi/asm-generic/socket.h
View File

@ -98,4 +98,6 @@
#define SO_INCOMING_NAPI_ID 56
#define SO_COOKIE 57
#endif /* __ASM_GENERIC_SOCKET_H */

8
net/core/sock.c
View File

@ -1083,6 +1083,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
union {
int val;
u64 val64;
struct linger ling;
struct timeval tm;
} v;
@ -1340,6 +1341,13 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
break;
#endif
case SO_COOKIE:
lv = sizeof(u64);
if (len < lv)
return -EINVAL;
v.val64 = sock_gen_cookie(sk);
break;
default:
/* We implement the SO_SNDLOWAT etc to not be settable
* (1003.1g 7).