mirror of
https://github.com/ceph/go-ceph
synced 2024-12-13 09:57:26 +00:00
82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
//
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// Ceph Mimic introduced rbd_snap_get_namespace_type().
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package rbd
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// #cgo LDFLAGS: -lrbd
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// #include <rbd/librbd.h>
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import "C"
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import (
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"unsafe"
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"github.com/ceph/go-ceph/internal/retry"
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)
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// SnapNamespaceType indicates the namespace to which the snapshot belongs to.
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type SnapNamespaceType C.rbd_snap_namespace_type_t
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const (
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// SnapNamespaceTypeUser indicates that the snapshot belongs to user namespace.
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SnapNamespaceTypeUser = SnapNamespaceType(C.RBD_SNAP_NAMESPACE_TYPE_USER)
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// SnapNamespaceTypeGroup indicates that the snapshot belongs to group namespace.
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// Such snapshots will have associated group information.
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SnapNamespaceTypeGroup = SnapNamespaceType(C.RBD_SNAP_NAMESPACE_TYPE_GROUP)
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// SnapNamespaceTypeTrash indicates that the snapshot belongs to trash namespace.
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SnapNamespaceTypeTrash = SnapNamespaceType(C.RBD_SNAP_NAMESPACE_TYPE_TRASH)
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)
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// GetSnapNamespaceType gets the type of namespace to which the snapshot belongs to,
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// returns error on failure.
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//
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// Implements:
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//
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// int rbd_snap_get_namespace_type(rbd_image_t image, uint64_t snap_id, rbd_snap_namespace_type_t *namespace_type)
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func (image *Image) GetSnapNamespaceType(snapID uint64) (SnapNamespaceType, error) {
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var nsType SnapNamespaceType
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if err := image.validate(imageIsOpen); err != nil {
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return nsType, err
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}
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ret := C.rbd_snap_get_namespace_type(image.image,
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C.uint64_t(snapID),
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(*C.rbd_snap_namespace_type_t)(&nsType))
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return nsType, getError(ret)
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}
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// GetSnapTrashNamespace returns the original name of the snapshot which was
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// moved to the Trash. The caller should make sure that the snapshot ID passed in this
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// function belongs to a snapshot already in the Trash.
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//
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// Implements:
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//
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// int rbd_snap_get_trash_namespace(rbd_image_t image, uint64_t snap_id, char *original_name, size_t max_length)
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func (image *Image) GetSnapTrashNamespace(snapID uint64) (string, error) {
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if err := image.validate(imageIsOpen); err != nil {
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return "", err
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}
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var (
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buf []byte
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err error
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)
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retry.WithSizes(4096, 262144, func(length int) retry.Hint {
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cLength := C.size_t(length)
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buf = make([]byte, cLength)
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ret := C.rbd_snap_get_trash_namespace(image.image,
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C.uint64_t(snapID),
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(*C.char)(unsafe.Pointer(&buf[0])),
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cLength)
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err = getError(ret)
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return retry.Size(int(cLength)).If(err == errRange)
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})
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if err != nil {
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return "", err
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}
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return C.GoString((*C.char)(unsafe.Pointer(&buf[0]))), nil
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}
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