// 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
}
func datasetPropertiesTo_nvlist(props map[ZFSProp]Property) (
cprops *C.nvlist_t, err error) {
// convert properties to nvlist C type
r := C.nvlist_alloc(&cprops, C.NV_UNIQUE_NAME, 0)
if r != 0 {
err = errors.New("Failed to allocate properties")
return
}
for prop, value := range props {
r := C.nvlist_add_string(
cprops, C.zfs_prop_to_name(
C.zfs_prop_t(prop)), C.CString(value.Value))
if r != 0 {
err = errors.New("Failed to convert property")
return
}
}
return
}
func buildVDevSpec(root *C.nvlist_t, rtype VDevType, vdevs []VDevSpec,
props PoolProperties) (err error) {
count := len(vdevs)
if count == 0 {
return
}
childrens := C.nvlist_alloc_array(C.int(count))
if childrens == nil {
err = errors.New("No enough memory")
return
}
defer C.nvlist_free_array(childrens)
spares := C.nvlist_alloc_array(C.int(count))
if childrens == nil {
err = errors.New("No enough memory")
return
}
nspares := 0
defer C.nvlist_free_array(spares)
l2cache := C.nvlist_alloc_array(C.int(count))
if childrens == nil {
err = errors.New("No enough memory")
return
}
nl2cache := 0
defer C.nvlist_free_array(l2cache)
for i, vdev := range vdevs {
grouping, mindevs, maxdevs := vdev.isGrouping()
var child *C.nvlist_t = nil
// fmt.Println(vdev.Type)
if r := C.nvlist_alloc(&child, C.NV_UNIQUE_NAME, 0); r != 0 {
err = errors.New("Failed to allocate vdev")
return
}
vcount := len(vdev.Devices)
if vcount < mindevs || vcount > maxdevs {
err = errors.New(fmt.Sprintf(
"Invalid vdev specification: %s supports no less than %d or more than %d devices", vdev.Type, mindevs, maxdevs))
return
}
if r := C.nvlist_add_string(child, C.CString(C.ZPOOL_CONFIG_TYPE),
C.CString(string(vdev.Type))); r != 0 {
err = errors.New("Failed to set vdev type")
return
}
if r := C.nvlist_add_uint64(child, C.CString(C.ZPOOL_CONFIG_IS_LOG),
vdev.isLog()); r != 0 {
err = errors.New("Failed to allocate vdev (is_log)")
return
}
if grouping {
if vdev.Type == VDevTypeRaidz {
r := C.nvlist_add_uint64(child,
C.CString(C.ZPOOL_CONFIG_NPARITY),
C.uint64_t(mindevs-1))
if r != 0 {
err = errors.New("Failed to allocate vdev (parity)")
return
}
}
if err = buildVDevSpec(child, vdev.Type, vdev.Devices,
props); err != nil {
return
}
} else {
// if vdev.Type == VDevTypeDisk {
if r := C.nvlist_add_uint64(child,
C.CString(C.ZPOOL_CONFIG_WHOLE_DISK), 1); r != 0 {
err = errors.New("Failed to allocate vdev child (whdisk)")
return
}
// }
if len(vdev.Path) > 0 {
if r := C.nvlist_add_string(
child, C.CString(C.ZPOOL_CONFIG_PATH),
C.CString(vdev.Path)); r != 0 {
err = errors.New("Failed to allocate vdev child (type)")
return
}
ashift, _ := strconv.Atoi(props[PoolPropAshift])
if ashift > 0 {
if r := C.nvlist_add_uint64(child,
C.CString(C.ZPOOL_CONFIG_ASHIFT),
C.uint64_t(ashift)); r != 0 {
err = errors.New("Failed to allocate vdev child (ashift)")
return
}
}
}
if vdev.Type == VDevTypeSpare {
C.nvlist_array_set(spares, C.int(nspares), child)
nspares++
count--
continue
} else if vdev.Type == VDevTypeL2cache {
C.nvlist_array_set(l2cache, C.int(nl2cache), child)
nl2cache++
count--
continue
}
}
C.nvlist_array_set(childrens, C.int(i), child)
}
if count > 0 {
if r := C.nvlist_add_nvlist_array(root,
C.CString(C.ZPOOL_CONFIG_CHILDREN), childrens,
C.uint_t(count)); r != 0 {
err = errors.New("Failed to allocate vdev children")
return
}
// fmt.Println("childs", root, count, rtype)
// debug.PrintStack()
}
if nl2cache > 0 {
if r := C.nvlist_add_nvlist_array(root,
C.CString(C.ZPOOL_CONFIG_L2CACHE), l2cache,
C.uint_t(nl2cache)); r != 0 {
err = errors.New("Failed to allocate vdev cache")
return
}
}
if nspares > 0 {
if r := C.nvlist_add_nvlist_array(root,
C.CString(C.ZPOOL_CONFIG_SPARES), spares,
C.uint_t(nspares)); r != 0 {
err = errors.New("Failed to allocate vdev spare")
return
}
// fmt.Println("spares", root, count)
}
return
}
