go-ceph/cephfs/errors.go

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package cephfs
/*
#include <errno.h>
*/
import "C"
import (
"errors"
"fmt"
"github.com/ceph/go-ceph/internal/errutil"
)
// cephFSError represents an error condition returned from the CephFS APIs.
type cephFSError int
// Error returns the error string for the cephFSError type.
func (e cephFSError) Error() string {
errno, s := errutil.FormatErrno(int(e))
if s == "" {
return fmt.Sprintf("cephfs: ret=%d", errno)
}
return fmt.Sprintf("cephfs: ret=%d, %s", errno, s)
}
func (e cephFSError) Errno() int {
return int(e)
}
func getError(e C.int) error {
if e == 0 {
return nil
}
return cephFSError(e)
}
// 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 (
// ErrEmptyArgument may be returned if a function argument is passed
// a zero-length slice or map.
ErrEmptyArgument = errors.New("Argument must contain at least one item")
)
// Public CephFSErrors:
const (
// ErrNotConnected may be returned when client is not connected
// to a cluster.
ErrNotConnected = cephFSError(-C.ENOTCONN)
)
// Private errors:
const (
errInvalid = cephFSError(-C.EINVAL)
errNameTooLong = cephFSError(-C.ENAMETOOLONG)
errNoEntry = cephFSError(-C.ENOENT)
errRange = cephFSError(-C.ERANGE)
)