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| author | Eric W. Biederman <ebiederm@xmission.com> | 2010-06-13 03:28:59 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-16 14:55:35 -0700 |
| commit | 3f551f9436c05a3b5eccdd6e94733df5bb98d2a5 (patch) | |
| tree | ee5a9148797994682a4553e817e96b721303f3ec | |
| parent | 5c1469de7545a35a16ff2b902e217044a7d2f8a5 (diff) | |
| download | linux-3f551f9436c05a3b5eccdd6e94733df5bb98d2a5.tar.gz linux-3f551f9436c05a3b5eccdd6e94733df5bb98d2a5.tar.bz2 linux-3f551f9436c05a3b5eccdd6e94733df5bb98d2a5.zip | |
sock: Introduce cred_to_ucred
To keep the coming code clear and to allow both the sock
code and the scm code to share the logic introduce a
fuction to translate from struct cred to struct ucred.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/socket.h | 5 | ||||
| -rw-r--r-- | net/core/sock.c | 14 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 032a19eb61b1..a2fada9becb6 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -24,6 +24,9 @@ struct __kernel_sockaddr_storage { #include <linux/types.h> /* pid_t */ #include <linux/compiler.h> /* __user */ +struct pid; +struct cred; + #define __sockaddr_check_size(size) \ BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage))) @@ -309,6 +312,8 @@ struct ucred { #define IPX_TYPE 1 #ifdef __KERNEL__ +extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred); + extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len); extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov, int offset, int len); diff --git a/net/core/sock.c b/net/core/sock.c index f9ce0db41cd6..db8335ad7559 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -110,6 +110,7 @@ #include <linux/tcp.h> #include <linux/init.h> #include <linux/highmem.h> +#include <linux/user_namespace.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -749,6 +750,19 @@ set_rcvbuf: EXPORT_SYMBOL(sock_setsockopt); +void cred_to_ucred(struct pid *pid, const struct cred *cred, + struct ucred *ucred) +{ + ucred->pid = pid_vnr(pid); + ucred->uid = ucred->gid = -1; + if (cred) { + struct user_namespace *current_ns = current_user_ns(); + + ucred->uid = user_ns_map_uid(current_ns, cred, cred->euid); + ucred->gid = user_ns_map_gid(current_ns, cred, cred->egid); + } +} + int sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { |