mirror of
https://github.com/ceph/go-ceph
synced 2024-12-18 20:35:33 +00:00
70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
//go:build !nautilus
|
|
// +build !nautilus
|
|
|
|
package rbd
|
|
|
|
// #cgo LDFLAGS: -lrbd
|
|
// #include <stdlib.h>
|
|
// #include <rbd/librbd.h>
|
|
import "C"
|
|
|
|
import (
|
|
"unsafe"
|
|
|
|
"github.com/ceph/go-ceph/internal/retry"
|
|
)
|
|
|
|
// GetSnapID returns the snapshot ID for the given snapshot name.
|
|
//
|
|
// Implements:
|
|
//
|
|
// int rbd_snap_get_id(rbd_image_t image, const char *snapname, uint64_t *snap_id)
|
|
func (image *Image) GetSnapID(snapName string) (uint64, error) {
|
|
var snapID C.uint64_t
|
|
if err := image.validate(imageIsOpen); err != nil {
|
|
return uint64(snapID), err
|
|
}
|
|
if snapName == "" {
|
|
return uint64(snapID), ErrSnapshotNoName
|
|
}
|
|
|
|
cSnapName := C.CString(snapName)
|
|
defer C.free(unsafe.Pointer(cSnapName))
|
|
|
|
ret := C.rbd_snap_get_id(image.image, cSnapName, &snapID)
|
|
return uint64(snapID), getError(ret)
|
|
}
|
|
|
|
// GetSnapByID returns the snapshot name for the given snapshot ID.
|
|
//
|
|
// Implements:
|
|
//
|
|
// int rbd_snap_get_name(rbd_image_t image, uint64_t snap_id, char *snapname, size_t *name_len)
|
|
func (image *Image) GetSnapByID(snapID uint64) (string, error) {
|
|
if err := image.validate(imageIsOpen); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
var (
|
|
buf []byte
|
|
err error
|
|
)
|
|
// range from 1k to 64KiB
|
|
retry.WithSizes(1024, 1<<16, func(len int) retry.Hint {
|
|
cLen := C.size_t(len)
|
|
buf = make([]byte, cLen)
|
|
ret := C.rbd_snap_get_name(
|
|
image.image,
|
|
(C.uint64_t)(snapID),
|
|
(*C.char)(unsafe.Pointer(&buf[0])),
|
|
&cLen)
|
|
err = getError(ret)
|
|
return retry.Size(int(cLen)).If(err == errRange)
|
|
})
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return C.GoString((*C.char)(unsafe.Pointer(&buf[0]))), nil
|
|
}
|