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/fs/exec.c b/fs/exec.c
index 6b6668b..1138dc5 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -833,7 +833,7 @@
EXPORT_SYMBOL(kernel_read);
int kernel_read_file(struct file *file, void **buf, loff_t *size,
- loff_t max_size)
+ loff_t max_size, enum kernel_read_file_id id)
{
loff_t i_size, pos;
ssize_t bytes = 0;
@@ -871,7 +871,7 @@
goto out;
}
- ret = security_kernel_post_read_file(file, *buf, i_size);
+ ret = security_kernel_post_read_file(file, *buf, i_size, id);
if (!ret)
*size = pos;