mirror of
https://github.com/ceph/go-ceph
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3d88c03e6e
I got a "rados: ret=-22" message as part of call I made. I'm a bit rusty with my C stderror codes, which made the error a bit unhelpful. This commit makes this particular error come out as "rados: invalid argument", even if we don't need to explicitly create a Rados error variable for invalid argument case. It does so by using C.strerror(). A further change is that with this, we do not need to explicitly code RadosErrorNotFound and RadosErrorPermissionsDenied using a different error type thank RadosError.
84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
package rados
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// #cgo LDFLAGS: -lrados
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// #include <errno.h>
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// #include <stdlib.h>
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// #include <rados/librados.h>
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import "C"
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import (
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"fmt"
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"unsafe"
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)
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type RadosError int
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func (e RadosError) Error() string {
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return fmt.Sprintf("rados: %s", C.GoString(C.strerror(C.int(-e))))
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}
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var RadosErrorNotFound = RadosError(-C.ENOENT)
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var RadosErrorPermissionDenied = RadosError(-C.EPERM)
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func GetRadosError(err int) error {
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if err == 0 {
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return nil
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}
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return RadosError(err)
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}
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// Version returns the major, minor, and patch components of the version of
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// the RADOS library linked against.
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func Version() (int, int, int) {
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var c_major, c_minor, c_patch C.int
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C.rados_version(&c_major, &c_minor, &c_patch)
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return int(c_major), int(c_minor), int(c_patch)
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}
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// NewConn creates a new connection object. It returns the connection and an
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// error, if any.
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func NewConn() (*Conn, error) {
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conn := &Conn{}
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ret := C.rados_create(&conn.cluster, nil)
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if ret == 0 {
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return conn, nil
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} else {
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return nil, RadosError(int(ret))
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}
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}
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// NewConnWithUser creates a new connection object with a custom username.
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// It returns the connection and an error, if any.
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func NewConnWithUser(user string) (*Conn, error) {
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c_user := C.CString(user)
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defer C.free(unsafe.Pointer(c_user))
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conn := &Conn{}
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ret := C.rados_create(&conn.cluster, c_user)
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if ret == 0 {
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return conn, nil
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} else {
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return nil, RadosError(int(ret))
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}
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}
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// NewConnWithClusterAndUser creates a new connection object for a specific cluster and username.
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// It returns the connection and an error, if any.
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func NewConnWithClusterAndUser(clusterName string, userName string) (*Conn, error) {
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c_cluster_name := C.CString(clusterName)
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defer C.free(unsafe.Pointer(c_cluster_name))
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c_name := C.CString(userName)
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defer C.free(unsafe.Pointer(c_name))
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conn := &Conn{}
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ret := C.rados_create2(&conn.cluster, c_cluster_name, c_name, 0)
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if ret == 0 {
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return conn, nil
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} else {
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return nil, RadosError(int(ret))
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}
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}
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