// ListPools returns the names of all existing pools.
func (c *Conn) ListPools() (names []string, err error) {
buf := make([]byte, 4096)
for {
ret := int(C.rados_pool_list(c.cluster,
(*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf))))
if ret < 0 {
return nil, RadosError(int(ret))
}
if ret > len(buf) {
buf = make([]byte, ret)
continue
}
tmp := bytes.SplitAfter(buf[:ret-1], []byte{0})
for _, s := range tmp {
if len(s) > 0 {
name := C.GoString((*C.char)(unsafe.Pointer(&s[0])))
names = append(names, name)
}
}
return names, nil
}
}
// ListPools returns all the pools in the ceph cluster.
func (cluster *Cluster) ListPools() ([]string, error) {
bufLen := 4096
for {
bufAddr := bufferAddress(bufLen)
ret := C.rados_pool_list(cluster.handle, bufAddr, C.size_t(bufLen))
if ret < 0 {
err := toRadosError(ret)
err.Message = "Unable to retrieve pool list"
return nil, err
}
if int(ret) > bufLen {
bufLen = int(ret)
continue
}
pools := bufToStringSlice(bufAddr, ret)
return pools, nil
}
}
// ListPools retuns a list of pools in the given RADOS cluster as
// a slice of strings.
func (r *Rados) ListPools() ([]string, error) {
var buf []byte
bufSize := 256 // Initial guess at amount of space we need
// Get the list of pools from RADOS. Note we may need to
// retry if our initial buffer size isn't big enough to
// hold all pools.
for {
buf = make([]byte, bufSize)
cdata, cdatalen := byteSliceToBuffer(buf)
// rados_pool_list() returns the number of bytes needed
// to return all pools.
cbufsize := C.rados_pool_list(r.rados, cdata, cdatalen)
if cbufsize < 0 {
return nil, radosReturnCodeError(cbufsize)
} else if int(cbufsize) > bufSize {
// We didn't have enough space -- try again
bufSize = int(cbufsize)
continue
}
break
}
// rados_pool_list() returns an array strings separated by NULL bytes
// with two NULL bytes at the end. Break these into individual strings.
pools := make([]string, 0)
poolsBuf := bytes.Split(buf, []byte{0})
for i, _ := range poolsBuf {
if len(poolsBuf[i]) == 0 {
continue
}
pools = append(pools, string(poolsBuf[i]))
}
return pools, nil
}