class GCSFS(Operations):
def __init__(self, path='.', gcs=None, **fsargs):
if gcs is None:
self.gcs = GCSFileSystem(**fsargs)
else:
self.gcs = gcs
self.cache = {}
self.counter = 0
self.root = path
def getattr(self, path, fh=None):
try:
info = self.gcs.info(''.join([self.root, path]))
except FileNotFoundError:
raise FuseOSError(ENOENT)
data = {'st_uid': 1000, 'st_gid': 1000}
perm = 0o777
if info['storageClass'] == 'DIRECTORY' or 'bucket' in info['kind']:
data['st_atime'] = 0
data['st_ctime'] = 0
data['st_mtime'] = 0
data['st_mode'] = (stat.S_IFDIR | perm)
data['st_size'] = 0
data['st_blksize'] = 0
else:
data['st_atime'] = str_to_time(info['timeStorageClassUpdated'])
data['st_ctime'] = str_to_time(info['timeCreated'])
data['st_mtime'] = str_to_time(info['updated'])
data['st_mode'] = (stat.S_IFREG | perm)
data['st_size'] = info['size']
data['st_blksize'] = 5 * 2**20
data['st_nlink'] = 1
return data
def readdir(self, path, fh):
path = ''.join([self.root, path])
files = self.gcs.ls(path)
files = [f.rstrip('/').rsplit('/', 1)[1] for f in files]
return ['.', '..'] + files
def mkdir(self, path, mode):
bucket, key = core.split_path(path)
if not self.gcs.info(path):
self.gcs.dirs['bucket'].append({
'bucket': bucket,
'kind': 'storage#object',
'size': 0,
'storageClass': 'DIRECTORY',
'name': path.rstrip('/') + '/'
})
def rmdir(self, path):
info = self.gcs.info(path)
if info['storageClass':'DIRECTORY']:
self.gcs.rm(path, False)
def read(self, path, size, offset, fh):
print('read', path, size, offset, fh)
fn = ''.join([self.root, path])
f = self.cache[fn]
f.seek(offset)
out = f.read(size)
return out
def write(self, path, data, offset, fh):
print('write', path, offset, fh)
f = self.cache[fh]
f.write(data)
return len(data)
def create(self, path, flags):
print('create', path, oct(flags))
fn = ''.join([self.root, path])
self.gcs.touch(
fn) # this makes sure directory entry exists - wasteful!
# write (but ignore creation flags)
f = self.gcs.open(fn, 'wb')
self.cache[self.counter] = f
self.counter += 1
return self.counter - 1
def open(self, path, flags):
print('open', path, oct(flags))
fn = ''.join([self.root, path])
if flags % 2 == 0:
# read
f = self.gcs.open(fn, 'rb')
else:
# write (but ignore creation flags)
f = self.gcs.open(fn, 'wb')
self.cache[self.counter] = f
self.counter += 1
return self.counter - 1
def truncate(self, path, length, fh=None):
print('truncate', path, length, fh)
fn = ''.join([self.root, path])
if length != 0:
raise NotImplementedError
# maybe should be no-op since open with write sets size to zero anyway
self.gcs.touch(fn)
def unlink(self, path):
print('delete', path)
fn = ''.join([self.root, path])
try:
self.gcs.rm(fn, False)
except (IOError, FileNotFoundError):
raise FuseOSError(EIO)
def release(self, path, fh):
print('close', path, fh)
try:
f = self.cache[fh]
f.close()
self.cache.pop(fh, None) # should release any cache memory
except Exception as e:
print(e)
return 0
def chmod(self, path, mode):
raise NotImplementedError
class GCSFS(Operations):
def __init__(self, path='.', gcs=None, nfiles=10, **fsargs):
if gcs is None:
# minimum block size: still read on 5MB boundaries.
self.gcs = GCSFileSystem(block_size=30 * 2 ** 20,
cache_timeout=6000, **fsargs)
else:
self.gcs = gcs
self.cache = SmallChunkCacher(self.gcs, nfiles=nfiles)
self.write_cache = {}
self.counter = 0
self.root = path
@_tracemethod
def getattr(self, path, fh=None):
path = ''.join([self.root, path])
try:
info = self.gcs.info(path)
except FileNotFoundError:
parent = path.rsplit('/', 1)[0]
if path in self.gcs.ls(parent):
info = True
else:
raise FuseOSError(ENOENT)
data = {'st_uid': 1000, 'st_gid': 1000}
perm = 0o777
if (info is True or info['storageClass'] == 'DIRECTORY'
or 'bucket' in info['kind']):
data['st_atime'] = 0
data['st_ctime'] = 0
data['st_mtime'] = 0
data['st_mode'] = (stat.S_IFDIR | perm)
data['st_size'] = 0
data['st_blksize'] = 0
else:
data['st_atime'] = str_to_time(info['timeStorageClassUpdated'])
data['st_ctime'] = str_to_time(info['timeCreated'])
data['st_mtime'] = str_to_time(info['updated'])
data['st_mode'] = (stat.S_IFREG | perm)
data['st_size'] = info['size']
data['st_blksize'] = 5 * 2**20
data['st_nlink'] = 1
return data
@_tracemethod
def readdir(self, path, fh):
path = ''.join([self.root, path])
logger.info("List {}, {}".format(path, fh))
files = self.gcs.ls(path)
files = [os.path.basename(f.rstrip('/')) for f in files]
return ['.', '..'] + files
@_tracemethod
def mkdir(self, path, mode):
path = ''.join([self.root, path])
logger.info("Mkdir {}".format(path))
parent, name = path.rsplit('/', 1)
prefixes = self.gcs._listing_cache[parent + '/'][1]['prefixes']
if name not in prefixes:
prefixes.append(name)
return 0
@_tracemethod
def rmdir(self, path):
info = self.gcs.info(path)
if info['storageClass': 'DIRECTORY']:
self.gcs.rm(path, False)
@_tracemethod
def read(self, path, size, offset, fh):
fn = ''.join([self.root, path])
logger.info('read #{} ({}) offset: {}, size: {}'.format(
fh, fn, offset, size))
out = self.cache.read(fn, offset, size)
return out
@_tracemethod
def write(self, path, data, offset, fh):
fn = ''.join([self.root, path])
logger.info('write #{} ({}) offset'.format(fh, fn, offset))
f = self.write_cache[fh]
f.write(data)
return len(data)
@_tracemethod
def create(self, path, flags):
fn = ''.join([self.root, path])
logger.info('create {} {}'.format(fn, oct(flags)))
self.gcs.touch(fn) # this makes sure directory entry exists - wasteful!
# write (but ignore creation flags)
f = self.gcs.open(fn, 'wb')
self.write_cache[self.counter] = f
logger.info('-> fh #{}'.format(self.counter))
self.counter += 1
return self.counter - 1
@_tracemethod
def open(self, path, flags):
fn = ''.join([self.root, path])
logger.info('open {} {}'.format(fn, oct(flags)))
if flags % 2 == 0:
# read
self.cache.open(fn)
else:
# write (but ignore creation flags)
self.gcs.open(fn, 'wb')
self.write_cache[self.counter] = f
logger.info('-> fh #{}'.format(self.counter))
self.counter += 1
return self.counter - 1
@_tracemethod
def truncate(self, path, length, fh=None):
fn = ''.join([self.root, path])
logger.info('truncate #{} ({}) to {}'.format(fh, fn, length))
if length != 0:
raise NotImplementedError
# maybe should be no-op since open with write sets size to zero anyway
self.gcs.touch(fn)
@_tracemethod
def unlink(self, path):
fn = ''.join([self.root, path])
logger.info('delete', fn)
try:
self.gcs.rm(fn, False)
except (IOError, FileNotFoundError):
raise FuseOSError(EIO)
@_tracemethod
def release(self, path, fh):
fn = ''.join([self.root, path])
logger.info('close #{} ({})'.format(fh, fn))
try:
if fh in self.write_cache:
# write mode
f = self.write_cache[fh]
f.close()
self.write_cache.pop(fh, None)
except Exception as e:
logger.exception("exception on release:" + str(e))
return 0
@_tracemethod
def chmod(self, path, mode):
raise NotImplementedError
