def nfs_export_add(req,
host,
path,
options=None,
chown=None,
export_path=None):
if not isinstance(options, list):
if options is not None and len(options) > 0:
options = [options]
else:
options = []
if export_path is not None:
raise TargetdError(
TargetdError.NFS_NO_SUPPORT,
"separate export path not supported at "
"this time")
bit_opt = 0
key_opt = {}
for o in options:
if '=' in o:
k, v = o.split('=')
key_opt[k] = v
else:
bit_opt |= Export.bool_option[o]
if chown is not None:
if not allow_chown:
raise TargetdError(
TargetdError.NO_SUPPORT,
"Chown is disabled. Consult manual before enabling it.")
items = chown.split(':')
try:
uid = int(items[0])
gid = -1
if len(items) > 1:
gid = int(items[1])
os.chown(path, uid, gid)
except ValueError as e:
raise TargetdError(TargetdError.INVALID_ARGUMENT,
"Wrong chown arguments: {}".format(e))
try:
Nfs.export_add(host, path, bit_opt, key_opt)
except ValueError as e:
raise TargetdError(TargetdError.INVALID_ARGUMENT, "{}".format(e))
return dict(host=host, path=path)
def _get_ss_by_uuid(req, fs_uuid, ss_uuid, fs_ht=None):
if fs_ht is None:
fs_ht = _get_fs_by_uuid(req, fs_uuid)
for s in ss(req, fs_uuid, fs_ht):
if s['uuid'] == ss_uuid:
return s
raise TargetdError(TargetdError.NOT_FOUND_SS, "snapshot not found")
def fs_create(req, pool_name, name, size_bytes):
full_path = os.path.join(pool_name, fs_path, name)
if not os.path.exists(full_path):
invoke([fs_cmd, 'subvolume', 'create', full_path])
else:
raise TargetdError(TargetdError.EXISTS_FS_NAME,
'FS already exists (Btrfs)')
def _invoke_retries(command, throw_exception):
# TODO take out this loop, used to handle bug in btrfs
# ERROR: Failed to lookup path for root 0 - No such file or directory
for i in range(0, 5):
result, out, err = invoke(command, False)
if result == 0:
return result, out, err
elif result == 19:
time.sleep(1)
continue
else:
raise TargetdError(-303, "Unexpected exit code %d" % result)
raise TargetdError(
-303, "Unable to execute command after "
"multiple retries %s" % (str(command)))
def initialize(config_dict):
global pools
global allow_chown
allow_chown = config_dict['allow_chown']
all_fs_pools = list(config_dict['fs_pools'])
for mount in all_fs_pools:
if not os.path.exists(mount):
raise TargetdError(TargetdError.NOT_FOUND_FS,
'The fs_pool {0} does not exist'.format(mount))
for info in Mount.mounted_filesystems():
if info[Mount.MOUNT_POINT] in all_fs_pools:
filesystem = info[Mount.FS_TYPE]
if filesystem in pool_modules:
# forward both mountpoint and device to the backend as ZFS prefers its own devices (pool/volume) and
# btrfs prefers mount points (/mnt/btrfs). Otherwise ZFS or btrfs needs to ask mounted_filesystems again
pools[filesystem].append({
"mount": info[Mount.MOUNT_POINT],
"device": info[Mount.DEVICE]
})
else:
raise TargetdError(
TargetdError.NO_SUPPORT,
'Unsupported filesystem {0} for pool {1}'.format(
info[2], info[1]))
for modname, mod in pool_modules.items():
mod.fs_initialize(config_dict, pools[modname])
return dict(
fs_list=fs,
fs_destroy=fs_destroy,
fs_create=fs_create,
fs_clone=fs_clone,
ss_list=ss,
fs_snapshot=fs_snapshot,
fs_snapshot_delete=fs_snapshot_delete,
nfs_export_auth_list=nfs_export_auth_list,
nfs_export_list=nfs_export_list,
nfs_export_add=nfs_export_add,
nfs_export_remove=nfs_export_remove,
)
def pool_check(pool_name):
"""
pool_name *cannot* be trusted, funcs taking a pool param must call
this or to ensure passed-in pool name is one targetd has
been configured to use.
"""
if pool_name not in pools:
raise TargetdError(-110, "Invalid filesystem pool")
def fs_create(req, pool_name, name, size_bytes):
pool_check(pool_name)
full_path = os.path.join(pool_name, fs_path, name)
if not os.path.exists(full_path):
invoke([fs_cmd, 'subvolume', 'create', full_path])
else:
raise TargetdError(-53, 'FS already exists')
def _json_payload(payload):
assert payload.get('jsonrpc') == "2.0"
if 'error' in payload:
error_code = int(payload['error']['code'])
if error_code <= 0:
raise TargetdError(error_code, payload['error'].get('message', ''))
else:
raise Exception("Invalid error code %d, should be negative!" %
error_code)
else:
return payload['result']
def pool_module(pool_name):
"""
Determines the module responsible for the given pool
:param pool_name: the pool to determine this for
:return: the module responsible for it
"""
for modname, mod in pool_modules.items():
if mod.has_fs_pool(pool_name):
return mod
raise TargetdError(TargetdError.INVALID_POOL,
"Invalid pool (%s)" % pool_name)
def nfs_export_remove(req, host, path):
found = False
for e in Nfs.exports():
if e.host == host and e.path == path:
Nfs.export_remove(e)
found = True
if not found:
raise TargetdError(-400, "NFS export to remove not found %s:%s",
(host, path))
def nfs_export_remove(req, host, path):
found = False
for e in Nfs.exports():
if e.host == host and e.path == path:
Nfs.export_remove(e)
found = True
if not found:
raise TargetdError(
TargetdError.NOT_FOUND_NFS_EXPORT,
"NFS export to remove not found %s:%s" % (host, path))
def fs_snapshot(req, pool, name, dest_ss_name):
source_path = os.path.join(pool, fs_path, name)
dest_base = os.path.join(pool, ss_path, name)
dest_path = os.path.join(dest_base, dest_ss_name)
create_sub_volume(dest_base)
if os.path.exists(dest_path):
raise TargetdError(TargetdError.EXISTS_FS_NAME,
"Snapshot already exists with that name (Btrfs)")
invoke([fs_cmd, 'subvolume', 'snapshot', '-r', source_path, dest_path])
def fs_clone(req, fs_uuid, dest_fs_name, snapshot_id):
fs_ht = _get_fs_by_uuid(req, fs_uuid)
if not fs_ht:
raise TargetdError(-104, "fs_uuid not found")
if snapshot_id:
snapshot = _get_ss_by_uuid(req, fs_uuid, snapshot_id)
if not snapshot:
raise TargetdError(-112, "snapshot not found")
source = os.path.join(fs_ht['pool'], ss_path, fs_ht['name'],
snapshot['name'])
dest = os.path.join(fs_ht['pool'], fs_path, dest_fs_name)
else:
source = os.path.join(fs_ht['pool'], fs_path, fs_ht['name'])
dest = os.path.join(fs_ht['pool'], fs_path, dest_fs_name)
if os.path.exists(dest):
raise TargetdError(-51, "Filesystem with that name exists")
invoke([fs_cmd, 'subvolume', 'snapshot', source, dest])
def fs_clone(req, pool, name, dest_fs_name, snapshot_name=None):
if snapshot_name is not None:
source = os.path.join(pool, ss_path, name, snapshot_name)
dest = os.path.join(pool, fs_path, dest_fs_name)
else:
source = os.path.join(pool, fs_path, name)
dest = os.path.join(pool, fs_path, dest_fs_name)
if os.path.exists(dest):
raise TargetdError(TargetdError.EXISTS_CLONE_NAME,
"Filesystem with that name exists (Btrfs)")
invoke([fs_cmd, 'subvolume', 'snapshot', source, dest])
def fs_snapshot(req, fs_uuid, dest_ss_name):
fs_ht = _get_fs_by_uuid(req, fs_uuid)
if fs_ht:
source_path = os.path.join(fs_ht['pool'], fs_path, fs_ht['name'])
dest_base = os.path.join(fs_ht['pool'], ss_path, fs_ht['name'])
dest_path = os.path.join(dest_base, dest_ss_name)
create_sub_volume(dest_base)
if os.path.exists(dest_path):
raise TargetdError(-53, "Snapshot already exists with that name")
invoke([fs_cmd, 'subvolume', 'snapshot', '-r', source_path, dest_path])
def nfs_export_add(req, host, path, export_path, options):
if export_path is not None:
raise TargetdError(
-401, "separate export path not supported at "
"this time")
bit_opt = 0
key_opt = {}
for o in options:
if '=' in o:
k, v = o.split('=')
key_opt[k] = v
else:
bit_opt |= Export.bool_option[o]
Nfs.export_add(host, path, bit_opt, key_opt)
def rpc(method, params=None, data=None):
global id_num
auth_info = HTTPBasicAuth(user, password)
if not data:
data = json.dumps(
dict(id=id_num, method=method, params=params,
jsonrpc="2.0")).encode('utf-8')
id_num += 1
url = "%s://%s:%s%s" % (proto, host, port, rpc_path)
r = requests.post(url, data=data, auth=auth_info, verify=cert_file)
if r.status_code == 200:
# JSON RPC error
return _json_payload(r.json())
else:
# Transport error
raise TargetdError(r.status_code, str(r))
def _get_fs_by_uuid(req, fs_uuid):
for f in fs(req):
if f['uuid'] == fs_uuid:
return f
raise TargetdError(TargetdError.NOT_FOUND_FS, "fs_uuid not found")