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authorPaul Moore <paul.moore@hp.com>2007-06-07 18:37:15 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-06-08 13:33:09 -0700
commitba6ff9f2b5c6018b293bd21083ffaa5ad710e671 (patch)
tree7a868d3a1948ab9e1aaf7b6e64e114e0f790370d /security
parent6363097cc4d182f93788131b5d8f72aa91d950a0 (diff)
downloadlinux-2.6.34-ux500-ba6ff9f2b5c6018b293bd21083ffaa5ad710e671.tar.gz
[NetLabel]: consolidate the struct socket/sock handling to just struct sock
The current NetLabel code has some redundant APIs which allow both "struct socket" and "struct sock" types to be used; this may have made sense at some point but it is wasteful now. Remove the functions that operate on sockets and convert the callers. Not only does this make the code smaller and more consistent but it pushes the locking burden up to the caller which can be more intelligent about the locks. Also, perform the same conversion (socket to sock) on the SELinux/NetLabel glue code where it make sense. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/netlabel.c36
1 files changed, 21 insertions, 15 deletions
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index bf8750791dd..e64eca246f1 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -36,8 +36,8 @@
#include "security.h"
/**
- * selinux_netlbl_socket_setsid - Label a socket using the NetLabel mechanism
- * @sock: the socket to label
+ * selinux_netlbl_sock_setsid - Label a socket using the NetLabel mechanism
+ * @sk: the socket to label
* @sid: the SID to use
*
* Description:
@@ -47,17 +47,17 @@
* this function and rcu_read_unlock() after this function returns.
*
*/
-static int selinux_netlbl_socket_setsid(struct socket *sock, u32 sid)
+static int selinux_netlbl_sock_setsid(struct sock *sk, u32 sid)
{
int rc;
- struct sk_security_struct *sksec = sock->sk->sk_security;
+ struct sk_security_struct *sksec = sk->sk_security;
struct netlbl_lsm_secattr secattr;
rc = security_netlbl_sid_to_secattr(sid, &secattr);
if (rc != 0)
return rc;
- rc = netlbl_socket_setattr(sock, &secattr);
+ rc = netlbl_sock_setattr(sk, &secattr);
if (rc == 0) {
spin_lock_bh(&sksec->nlbl_lock);
sksec->nlbl_state = NLBL_LABELED;
@@ -206,7 +206,7 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
/* Try to set the NetLabel on the socket to save time later, if we fail
* here we will pick up the pieces in later calls to
* selinux_netlbl_inode_permission(). */
- selinux_netlbl_socket_setsid(sock, sksec->sid);
+ selinux_netlbl_sock_setsid(sk, sksec->sid);
rcu_read_unlock();
}
@@ -223,14 +223,15 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
int selinux_netlbl_socket_post_create(struct socket *sock)
{
int rc = 0;
+ struct sock *sk = sock->sk;
struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
- struct sk_security_struct *sksec = sock->sk->sk_security;
+ struct sk_security_struct *sksec = sk->sk_security;
sksec->sclass = isec->sclass;
rcu_read_lock();
if (sksec->nlbl_state == NLBL_REQUIRE)
- rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
+ rc = selinux_netlbl_sock_setsid(sk, sksec->sid);
rcu_read_unlock();
return rc;
@@ -251,14 +252,16 @@ int selinux_netlbl_socket_post_create(struct socket *sock)
int selinux_netlbl_inode_permission(struct inode *inode, int mask)
{
int rc;
- struct sk_security_struct *sksec;
+ struct sock *sk;
struct socket *sock;
+ struct sk_security_struct *sksec;
if (!S_ISSOCK(inode->i_mode) ||
((mask & (MAY_WRITE | MAY_APPEND)) == 0))
return 0;
sock = SOCKET_I(inode);
- sksec = sock->sk->sk_security;
+ sk = sock->sk;
+ sksec = sk->sk_security;
rcu_read_lock();
if (sksec->nlbl_state != NLBL_REQUIRE) {
@@ -266,9 +269,9 @@ int selinux_netlbl_inode_permission(struct inode *inode, int mask)
return 0;
}
local_bh_disable();
- bh_lock_sock_nested(sock->sk);
- rc = selinux_netlbl_socket_setsid(sock, sksec->sid);
- bh_unlock_sock(sock->sk);
+ bh_lock_sock_nested(sk);
+ rc = selinux_netlbl_sock_setsid(sk, sksec->sid);
+ bh_unlock_sock(sk);
local_bh_enable();
rcu_read_unlock();
@@ -345,14 +348,17 @@ int selinux_netlbl_socket_setsockopt(struct socket *sock,
int optname)
{
int rc = 0;
- struct sk_security_struct *sksec = sock->sk->sk_security;
+ struct sock *sk = sock->sk;
+ struct sk_security_struct *sksec = sk->sk_security;
struct netlbl_lsm_secattr secattr;
rcu_read_lock();
if (level == IPPROTO_IP && optname == IP_OPTIONS &&
sksec->nlbl_state == NLBL_LABELED) {
netlbl_secattr_init(&secattr);
- rc = netlbl_socket_getattr(sock, &secattr);
+ lock_sock(sk);
+ rc = netlbl_sock_getattr(sk, &secattr);
+ release_sock(sk);
if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
rc = -EACCES;
netlbl_secattr_destroy(&secattr);