go-ceph/rbd/errors.go

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package rbd
/*
#include <errno.h>
*/
import "C"
import (
"errors"
"fmt"
"github.com/ceph/go-ceph/internal/errutil"
)
// revive:disable:exported Temporarily live with stuttering
// RBDError represents an error condition returned from the librbd APIs.
type RBDError int
// revive:enable:exported
func (e RBDError) Error() string {
errno, s := errutil.FormatErrno(int(e))
if s == "" {
return fmt.Sprintf("rbd: ret=%d", errno)
}
return fmt.Sprintf("rbd: ret=%d, %s", errno, s)
}
func getError(err C.int) error {
if err != 0 {
if err == -C.ENOENT {
return ErrNotFound
}
return RBDError(err)
}
return nil
}
// getErrorIfNegative converts a ceph return code to error if negative.
// This is useful for functions that return a usable positive value on
// success but a negative error number on error.
func getErrorIfNegative(ret C.int) error {
if ret >= 0 {
return nil
}
return getError(ret)
}
// Public go errors:
var (
// ErrNoIOContext may be returned if an api call requires an IOContext and
// it is not provided.
ErrNoIOContext = errors.New("RBD image does not have an IOContext")
// ErrNoName may be returned if an api call requires a name and it is
// not provided.
ErrNoName = errors.New("RBD image does not have a name")
// ErrSnapshotNoName may be returned if an aip call requires a snapshot
// name and it is not provided.
ErrSnapshotNoName = errors.New("RBD snapshot does not have a name")
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// ErrImageNotOpen may be returned if an api call requires an open image handle and one is not provided.
ErrImageNotOpen = errors.New("RBD image not open")
// ErrNotFound may be returned from an api call when the requested item is
// missing.
ErrNotFound = errors.New("RBD image not found")
// revive:disable:exported for compatibility with old versions
RbdErrorImageNotOpen = ErrImageNotOpen
RbdErrorNotFound = ErrNotFound
// revive:enable:exported
)
// Private errors:
const (
errRange = RBDError(-C.ERANGE)
)