pub struct DmOptions { /* fields omitted */ }
Encapsulates options for device mapper calls
Create a new empty option
Set the DmFlags value for option. Note this call is not additive in that it sets (replaces)
entire flag value in one call. Thus if you want to incrementally add additional flags you
need to retrieve current and '|' with new.
use devicemapper::DmFlags;
use devicemapper::DmOptions;
let mut options = DmOptions::new();
options.set_flags(DmFlags::DM_READONLY);
let flags = DmFlags::DM_PERSISTENT_DEV | options.flags();
options.set_flags(flags);
Set the cookie bitfield value for option (overloaded meaning with event_nr in header).
Note this call is not additive in that it sets (replaces) entire cookie value in one call.
Thus if you want to incrementally add additional flags you need to retrieve current and '|'
with new.
use devicemapper::{DmCookie, DmFlags};
use devicemapper::DmOptions;
let mut options = DmOptions::new();
options.set_cookie(DmCookie::DM_UDEV_PRIMARY_SOURCE_FLAG);
let new_cookie = options.cookie() | DmCookie::DM_UDEV_DISABLE_DM_RULES_FLAG;
options.set_cookie(new_cookie);
Retrieve the cookie value (used for input in upper 16 bits of event_nr header field).
Formats the value using the given formatter. Read more
Returns the "default value" for a type. Read more
Performs copy-assignment from source
. Read more