path: root/include/linux/security.h
diff options
authorOndrej Mosnacek <omosnace@redhat.com>2019-02-22 15:57:16 +0100
committerPaul Moore <paul@paul-moore.com>2019-03-20 22:01:02 -0400
commitb230d5aba2d1a7b0636408889a75bf9eae6b8bc7 (patch)
tree57bacbcb8d8114c376cef0d23110a236af5e985a /include/linux/security.h
parentkernfs: use simple_xattrs for security attributes (diff)
LSM: add new hook for kernfs node initialization
This patch introduces a new security hook that is intended for initializing the security data for newly created kernfs nodes, which provide a way of storing a non-default security context, but need to operate independently from mounts (and therefore may not have an associated inode at the moment of creation). The main motivation is to allow kernfs nodes to inherit the context of the parent under SELinux, similar to the behavior of security_inode_init_security(). Other LSMs may implement their own logic for handling the creation of new nodes. This patch also adds helper functions to <linux/kernfs.h> for getting/setting security xattrs of a kernfs node so that LSMs hooks are able to do their job. Other important attributes should be accessible direcly in the kernfs_node fields (in case there is need for more, then new helpers should be added to kernfs.h along with the patch that needs them). Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Acked-by: Casey Schaufler <casey@schaufler-ca.com> [PM: more manual merge fixes] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'include/linux/security.h')
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h
index 49f2685324b0..d543293216b9 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -51,6 +51,7 @@ struct fown_struct;
struct file_operations;
struct msg_msg;
struct xattr;
+struct kernfs_node;
struct xfrm_sec_ctx;
struct mm_struct;
struct fs_context;
@@ -299,6 +300,8 @@ int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer
void security_inode_getsecid(struct inode *inode, u32 *secid);
int security_inode_copy_up(struct dentry *src, struct cred **new);
int security_inode_copy_up_xattr(const char *name);
+int security_kernfs_init_security(struct kernfs_node *kn_dir,
+ struct kernfs_node *kn);
int security_file_permission(struct file *file, int mask);
int security_file_alloc(struct file *file);
void security_file_free(struct file *file);
@@ -801,6 +804,12 @@ static inline int security_inode_copy_up(struct dentry *src, struct cred **new)
return 0;
+static inline int security_kernfs_init_security(struct kernfs_node *kn_dir,
+ struct kernfs_node *kn)
+ return 0;
static inline int security_inode_copy_up_xattr(const char *name)