Add store methods for finding the list of UIDs and GIDs which probably
need to be mapped if a given layer or container's layer, which has to
have been mounted at least once in order for us to know where it goes,
is going to be used for a container that is run with the configured ID
mappings in a separate user namespace.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Teach image and container store types to also track the digests of "big
data" items that we have them store.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
When we read itms from disk, if maps in the structures are empty, they
won't be allocated as part of the decoding process. When we
subsequently go to read or write something from such a map, make sure
it's been initialized.
Add some validation of names that we convert to file names, and of
digest values, so that we can be more precise about the error code we
return when there's a problem with the values.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Use the standard library's "errors" package to create errors so that
backtraces in wrapped errors terminate at the point where the error was
first wrapped, and not at the line where we created the error, which
isn't as useful for troubleshooting.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Nalin Dahyabhai