vfs: define kernel_read_file_id enumeration
To differentiate between the kernel_read_file() callers, this patch
defines a new enumeration named kernel_read_file_id and includes the
caller identifier as an argument.
Subsequent patches define READING_KEXEC_IMAGE, READING_KEXEC_INITRAMFS,
READING_FIRMWARE, READING_MODULE, and READING_POLICY.
Changelog v3:
- Replace the IMA specific enumeration with a generic one.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/security.h b/include/linux/security.h
index f30f564..b68ce94 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -28,6 +28,7 @@
#include <linux/err.h>
#include <linux/string.h>
#include <linux/mm.h>
+#include <linux/fs.h>
struct linux_binprm;
struct cred;
@@ -301,7 +302,8 @@
int security_kernel_fw_from_file(struct file *file, char *buf, size_t size);
int security_kernel_module_request(char *kmod_name);
int security_kernel_module_from_file(struct file *file);
-int security_kernel_post_read_file(struct file *file, char *buf, loff_t size);
+int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
+ enum kernel_read_file_id id);
int security_task_fix_setuid(struct cred *new, const struct cred *old,
int flags);
int security_task_setpgid(struct task_struct *p, pid_t pgid);
@@ -868,7 +870,8 @@
}
static inline int security_kernel_post_read_file(struct file *file,
- char *buf, loff_t size)
+ char *buf, loff_t size,
+ enum kernel_read_file_id id)
{
return 0;
}