From d8ad8b49618410ddeafd78465b63a6cedd6c9484 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Wed, 13 Jul 2016 11:13:56 -0400 Subject: security, overlayfs: provide copy up security hook for unioned files Provide a security hook to label new file correctly when a file is copied up from lower layer to upper layer of a overlay/union mount. This hook can prepare a new set of creds which are suitable for new file creation during copy up. Caller will use new creds to create file and then revert back to old creds and release new creds. Signed-off-by: Vivek Goyal Acked-by: Stephen Smalley [PM: whitespace cleanup to appease checkpatch.pl] Signed-off-by: Paul Moore --- include/linux/security.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/security.h') diff --git a/include/linux/security.h b/include/linux/security.h index 7831cd5..c5b0ccd 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -282,6 +282,7 @@ int security_inode_getsecurity(struct inode *inode, const char *name, void **buf int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags); int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size); void security_inode_getsecid(struct inode *inode, u32 *secid); +int security_inode_copy_up(struct dentry *src, struct cred **new); int security_file_permission(struct file *file, int mask); int security_file_alloc(struct file *file); void security_file_free(struct file *file); @@ -758,6 +759,11 @@ static inline void security_inode_getsecid(struct inode *inode, u32 *secid) *secid = 0; } +static inline int security_inode_copy_up(struct dentry *src, struct cred **new) +{ + return 0; +} + static inline int security_file_permission(struct file *file, int mask) { return 0; -- cgit v1.1