rbd: add ErrExists as standard error

nixpanic · nixpanic · commit ea56b185f694 · 2024-09-24T12:59:42.000+02:00
Certain operations with RBD can return the C errno EEXISTS. Applications
using go-ceph benefit from easily detecting this error.

Signed-off-by: Niels de Vos &lt;ndevos@ibm.com&gt;
diff --git a/rbd/errors.go b/rbd/errors.go
@@ -73,6 +73,8 @@ var (
 
 // Public general error
 const (
+	// ErrExist indicates a non-specific already existing resource.
+	ErrExist = rbdError(-C.EXISTS)
 	// ErrNotExist indicates a non-specific missing resource.
 	ErrNotExist = rbdError(-C.ENOENT)
 	// ErrNotImplemented indicates a function is not implemented in by librbd.
