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authorVivek Goyal <vgoyal@redhat.com>2016-07-13 17:44:49 +0300
committerPaul Moore <paul@paul-moore.com>2016-08-09 03:42:13 +0300
commit121ab822ef21914adac2fa3730efeeb8fd762473 (patch)
tree7fd5f6947837b361c249ec976af17bee10b22a2e /include/linux/security.h
parent56909eb3f559103196ecbf2c08c923e0804980fb (diff)
downloadlinux-121ab822ef21914adac2fa3730efeeb8fd762473.tar.xz
security,overlayfs: Provide security hook for copy up of xattrs for overlay file
Provide a security hook which is called when xattrs of a file are being copied up. This hook is called once for each xattr and LSM can return 0 if the security module wants the xattr to be copied up, 1 if the security module wants the xattr to be discarded on the copy, -EOPNOTSUPP if the security module does not handle/manage the xattr, or a -errno upon an error. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> [PM: whitespace cleanup for checkpatch.pl] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'include/linux/security.h')
-rw-r--r--include/linux/security.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h
index c5b0ccd6c8b6..536fafdfa10a 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -283,6 +283,7 @@ int security_inode_setsecurity(struct inode *inode, const char *name, const void
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_inode_copy_up_xattr(const char *name);
int security_file_permission(struct file *file, int mask);
int security_file_alloc(struct file *file);
void security_file_free(struct file *file);
@@ -764,6 +765,11 @@ static inline int security_inode_copy_up(struct dentry *src, struct cred **new)
return 0;
}
+static inline int security_inode_copy_up_xattr(const char *name)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int security_file_permission(struct file *file, int mask)
{
return 0;