// Create ZFS pool per specs, features and properties of pool and root dataset
func PoolCreate(name string, vdevs []VDevSpec, features map[string]string,
props PoolProperties, fsprops ZFSProperties) (pool Pool, err error) {
// create root vdev nvroot
var nvroot *C.nvlist_t = nil
if r := C.nvlist_alloc(&nvroot, C.NV_UNIQUE_NAME, 0); r != 0 {
err = errors.New("Failed to allocate root vdev")
return
}
if r := C.nvlist_add_string(nvroot, C.CString(C.ZPOOL_CONFIG_TYPE),
C.CString(string(VDevTypeRoot))); r != 0 {
err = errors.New("Failed to allocate root vdev")
return
}
defer C.nvlist_free(nvroot)
// Now we need to build specs (vdev hierarchy)
if err = buildVDevSpec(nvroot, VDevTypeRoot, vdevs, props); err != nil {
return
}
// convert properties
cprops := toCPoolProperties(props)
if cprops != nil {
defer C.nvlist_free(cprops)
} else if len(props) > 0 {
err = errors.New("Failed to allocate pool properties")
return
}
cfsprops := toCZFSProperties(fsprops)
if cfsprops != nil {
defer C.nvlist_free(cfsprops)
} else if len(fsprops) > 0 {
err = errors.New("Failed to allocate FS properties")
return
}
for fname, fval := range features {
sfname := fmt.Sprintf("feature@%s", fname)
r := C.add_prop_list(C.CString(sfname), C.CString(fval), &cprops,
C.boolean_t(1))
if r != 0 {
if cprops != nil {
C.nvlist_free(cprops)
cprops = nil
}
return
}
}
// Create actual pool then open
if r := C.zpool_create(libzfs_handle, C.CString(name), nvroot,
cprops, cfsprops); r != 0 {
err = LastError()
return
}
pool, err = PoolOpen(name)
return
}
// Create dataset snapshot. Set recur to true to snapshot child datasets.
func DatasetSnapshot(path string, recur bool, props map[ZFSProp]Property) (rd Dataset, err error) {
var cprops *C.nvlist_t
if cprops, err = datasetPropertiesTo_nvlist(props); err != nil {
return
}
defer C.nvlist_free(cprops)
if errc := C.zfs_snapshot(libzfs_handle, C.CString(path), boolean_t(recur), cprops); errc != 0 {
err = LastError()
return
}
rd, err = DatasetOpen(path)
return
}
// Create a new filesystem or volume on path representing pool/dataset or pool/parent/dataset
func DatasetCreate(path string, dtype DatasetType,
props map[ZFSProp]Property) (d Dataset, err error) {
var cprops *C.nvlist_t
if cprops, err = datasetPropertiesTo_nvlist(props); err != nil {
return
}
defer C.nvlist_free(cprops)
errcode := C.zfs_create(libzfs_handle, C.CString(path),
C.zfs_type_t(dtype), cprops)
if errcode != 0 {
err = LastError()
}
return
}
func toCZFSProperties(props ZFSProperties) (cprops *C.nvlist_t) {
cprops = nil
for prop, value := range props {
name := C.zfs_prop_to_name(C.zfs_prop_t(prop))
r := C.add_prop_list(name, C.CString(value), &cprops, C.boolean_t(0))
if r != 0 {
if cprops != nil {
C.nvlist_free(cprops)
cprops = nil
}
return
}
}
return
}
// Given a list of directories to search, find and import pool with matching
// name stored on disk.
func PoolImport(name string, searchpaths []string) (pool Pool, err error) {
errPoolList := errors.New("Failed to list pools")
var elem *C.nvpair_t
var config *C.nvlist_t
numofp := len(searchpaths)
cpaths := C.alloc_strings(C.int(numofp))
for i, path := range searchpaths {
C.strings_setat(cpaths, C.int(i), C.CString(path))
}
pools := C.zpool_find_import(libzfs_handle, C.int(numofp), cpaths)
defer C.nvlist_free(pools)
elem = C.nvlist_next_nvpair(pools, elem)
for ; elem != nil; elem = C.nvlist_next_nvpair(pools, elem) {
var cname *C.char
var tconfig *C.nvlist_t
retcode := C.nvpair_value_nvlist(elem, &tconfig)
if retcode != 0 {
err = errPoolList
return
}
retcode = C.nvlist_lookup_string(tconfig,
C.CString(C.ZPOOL_CONFIG_POOL_NAME), &cname)
if retcode != 0 {
err = errPoolList
return
}
oname := C.GoString(cname)
if name == oname {
config = tconfig
break
}
}
if config == nil {
err = errors.New("No pools to import found with name " + name)
return
}
retcode := C.zpool_import(libzfs_handle, config, C.CString(name), nil)
if retcode != 0 {
err = LastError()
return
}
pool, err = PoolOpen(name)
return
}
// Clones the dataset. The target must be of the same type as
// the source.
func (d *Dataset) Clone(target string, props map[ZFSProp]Property) (rd Dataset, err error) {
var cprops *C.nvlist_t
if d.list == nil {
err = errors.New(msgDatasetIsNil)
return
}
if cprops, err = datasetPropertiesTo_nvlist(props); err != nil {
return
}
defer C.nvlist_free(cprops)
if errc := C.zfs_clone(d.list.zh, C.CString(target), cprops); errc != 0 {
err = LastError()
return
}
rd, err = DatasetOpen(target)
return
}