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-rw-r--r--include/linux/security.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h
index 7aab6ab..d4f3b7a 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -250,6 +250,25 @@ struct swap_info_struct;
* @inode contains the inode structure.
* Deallocate the inode security structure and set @inode->i_security to
* NULL.
+ * @inode_init_security:
+ * Obtain the security attribute name suffix and value to set on a newly
+ * created inode and set up the incore security field for the new inode.
+ * This hook is called by the fs code as part of the inode creation
+ * transaction and provides for atomic labeling of the inode, unlike
+ * the post_create/mkdir/... hooks called by the VFS. The hook function
+ * is expected to allocate the name and value via kmalloc, with the caller
+ * being responsible for calling kfree after using them.
+ * If the security module does not use security attributes or does
+ * not wish to put a security attribute on this particular inode,
+ * then it should return -EOPNOTSUPP to skip this processing.
+ * @inode contains the inode structure of the newly created inode.
+ * @dir contains the inode structure of the parent directory.
+ * @name will be set to the allocated name suffix (e.g. selinux).
+ * @value will be set to the allocated attribute value.
+ * @len will be set to the length of the value.
+ * Returns 0 if @name and @value have been successfully set,
+ * -EOPNOTSUPP if no security attribute is needed, or
+ * -ENOMEM on memory allocation failure.
* @inode_create:
* Check permission to create a regular file.
* @dir contains inode structure of the parent of the new file.
@@ -1080,6 +1099,8 @@ struct security_operations {
int (*inode_alloc_security) (struct inode *inode);
void (*inode_free_security) (struct inode *inode);
+ int (*inode_init_security) (struct inode *inode, struct inode *dir,
+ char **name, void **value, size_t *len);
int (*inode_create) (struct inode *dir,
struct dentry *dentry, int mode);
void (*inode_post_create) (struct inode *dir,
@@ -1442,6 +1463,17 @@ static inline void security_inode_free (struct inode *inode)
return;
security_ops->inode_free_security (inode);
}
+
+static inline int security_inode_init_security (struct inode *inode,
+ struct inode *dir,
+ char **name,
+ void **value,
+ size_t *len)
+{
+ if (unlikely (IS_PRIVATE (inode)))
+ return -EOPNOTSUPP;
+ return security_ops->inode_init_security (inode, dir, name, value, len);
+}
static inline int security_inode_create (struct inode *dir,
struct dentry *dentry,
@@ -2171,6 +2203,15 @@ static inline int security_inode_alloc (struct inode *inode)
static inline void security_inode_free (struct inode *inode)
{ }
+
+static inline int security_inode_init_security (struct inode *inode,
+ struct inode *dir,
+ char **name,
+ void **value,
+ size_t *len)
+{
+ return -EOPNOTSUPP;
+}
static inline int security_inode_create (struct inode *dir,
struct dentry *dentry,
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