Security: Add Hook to test if the particular xattr is part of a MAC model.

[~andy/linux] / include / linux / security.h

diff --git a/include/linux/security.h b/include/linux/security.h
index c2af46264ae0fcd519897f4fbcc84b4cf40cba6e..cff3e4fc428102aebc4a00e1dbada2beaf27c47e 100644 (file)
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1323,6 +1323,13 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *     @pages contains the number of pages.
  *     Return 0 if permission is granted.
  *
+ * @ismaclabel:
+ *     Check if the extended attribute specified by @name
+ *     represents a MAC label. Returns 1 if name is a MAC
+ *     attribute otherwise returns 0.
+ *     @name full extended attribute name to check against
+ *     LSM as a MAC label.
+ *
  * @secid_to_secctx:
  *     Convert secid to security context.  If secdata is NULL the length of
  *     the result will be returned in seclen, but no secdata will be returned.
@@ -1604,6 +1611,7 @@ struct security_operations {
 
        int (*getprocattr) (struct task_struct *p, char *name, char **value);
        int (*setprocattr) (struct task_struct *p, char *name, void *value, size_t size);
+       int (*ismaclabel) (const char *name);
        int (*secid_to_secctx) (u32 secid, char **secdata, u32 *seclen);
        int (*secctx_to_secid) (const char *secdata, u32 seclen, u32 *secid);
        void (*release_secctx) (char *secdata, u32 seclen);
@@ -1857,6 +1865,7 @@ void security_d_instantiate(struct dentry *dentry, struct inode *inode);
 int security_getprocattr(struct task_struct *p, char *name, char **value);
 int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size);
 int security_netlink_send(struct sock *sk, struct sk_buff *skb);
+int security_ismaclabel(const char *name);
 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen);
 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
 void security_release_secctx(char *secdata, u32 seclen);
@@ -2547,6 +2556,11 @@ static inline int security_netlink_send(struct sock *sk, struct sk_buff *skb)
        return cap_netlink_send(sk, skb);
 }
 
+static inline int security_ismaclabel(const char *name)
+{
+       return 0;
+}
+
 static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 {
        return -EOPNOTSUPP;