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[Qemu-devel] [PATCH RFC 3/3] linux-user: add netlink audit
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [PATCH RFC 3/3] linux-user: add netlink audit |
Date: |
Sat, 30 Jan 2016 23:27:00 +0100 |
This is, for instance, needed to log in a container.
Without this, the user cannot be identified and the console login
fails with "Login incorrect".
Signed-off-by: Laurent Vivier <address@hidden>
---
linux-user/syscall.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 790ae49..fa50299 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -102,6 +102,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include "linux_loop.h"
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
+#include <linux/audit.h>
#include "uname.h"
#include "qemu.h"
@@ -1878,6 +1879,44 @@ static abi_long target_to_host_nlmsg_route(struct
nlmsghdr *nlh, size_t len)
return target_to_host_for_each_nlmsg(nlh, len, target_to_host_data_route);
}
+static abi_long host_to_target_data_audit(struct nlmsghdr *nlh)
+{
+ switch (nlh->nlmsg_type) {
+ default:
+ fprintf(stderr, "Unknown host audit message type %d\n",
+ nlh->nlmsg_type);
+ return -TARGET_EINVAL;
+ }
+ return 0;
+}
+
+static inline abi_long host_to_target_nlmsg_audit(struct nlmsghdr *nlh,
+ size_t len)
+{
+ return host_to_target_for_each_nlmsg(nlh, len, host_to_target_data_audit);
+}
+
+static abi_long target_to_host_data_audit(struct nlmsghdr *nlh)
+{
+ switch (nlh->nlmsg_type) {
+ case AUDIT_USER:
+ case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG:
+ case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2:
+ break;
+ default:
+ fprintf(stderr, "Unknown target audit message type %d\n",
+ nlh->nlmsg_type);
+ return -TARGET_EINVAL;
+ }
+
+ return 0;
+}
+
+static abi_long target_to_host_nlmsg_audit(struct nlmsghdr *nlh, size_t len)
+{
+ return target_to_host_for_each_nlmsg(nlh, len, target_to_host_data_audit);
+}
+
/* do_setsockopt() Must return target values and target errnos. */
static abi_long do_setsockopt(int sockfd, int level, int optname,
abi_ulong optval_addr, socklen_t optlen)
@@ -2543,6 +2582,21 @@ static TargetFdTrans target_netlink_route_trans = {
.host_to_target_data = netlink_route_host_to_target,
};
+static abi_long netlink_audit_target_to_host(void *buf, size_t len)
+{
+ return target_to_host_nlmsg_audit(buf, len);
+}
+
+static abi_long netlink_audit_host_to_target(void *buf, size_t len)
+{
+ return host_to_target_nlmsg_audit(buf, len);
+}
+
+static TargetFdTrans target_netlink_audit_trans = {
+ .target_to_host_data = netlink_audit_target_to_host,
+ .host_to_target_data = netlink_audit_host_to_target,
+};
+
/* do_socket() Must return target values and target errnos. */
static abi_long do_socket(int domain, int type, int protocol)
{
@@ -2575,6 +2629,9 @@ static abi_long do_socket(int domain, int type, int
protocol)
case NETLINK_KOBJECT_UEVENT:
/* nothing to do: messages are strings */
break;
+ case NETLINK_AUDIT:
+ fd_trans_register(ret, &target_netlink_audit_trans);
+ break;
default:
close(ret);
ret = -EPFNOSUPPORT;
--
2.5.0