go-ceph/rbd/rbd_mimic.go

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// +build luminous mimic
// +build !nautilus
//
// Ceph Nautilus includes rbd_list2() and marked rbd_list() deprecated.
package rbd
// #cgo LDFLAGS: -lrbd
// #include <rados/librados.h>
// #include <rbd/librbd.h>
// #include <errno.h>
import "C"
import (
"unsafe"
"github.com/ceph/go-ceph/internal/cutil"
"github.com/ceph/go-ceph/internal/retry"
"github.com/ceph/go-ceph/rados"
)
// GetImageNames returns the list of current RBD images.
func GetImageNames(ioctx *rados.IOContext) (names []string, err error) {
var (
buf []byte
csize C.size_t
)
// from 4KiB to 32KiB
retry.WithSizes(4096, 1<<15, func(size int) retry.Hint {
csize = C.size_t(size)
buf = make([]byte, csize)
ret := C.rbd_list(cephIoctx(ioctx),
(*C.char)(unsafe.Pointer(&buf[0])), &csize)
err = getErrorIfNegative(ret)
return retry.Size(int(csize)).If(err == errRange)
})
if err != nil {
return nil, err
}
names = cutil.SplitSparseBuffer(buf[:csize])
return names, nil
}