def _create_node(self, node, name, meta_info):
self.ensure_entries()
# make sure a default meta_info is available
if meta_info == None:
meta_info = MetaInfo()
meta_info.set_current_time()
meta_info.set_default_protect()
# check file name
fn = FileName(name)
if not fn.is_valid():
raise FSError(INVALID_FILE_NAME, file_name=name, node=self)
# does already exist an entry in this dir with this name?
if self.has_name(fn):
raise FSError(NAME_ALREADY_EXISTS, file_name=name, node=self)
# calc hash index of name
fn_hash = fn.hash()
hash_chain = self.name_hash[fn_hash]
if len(hash_chain) == 0:
hash_chain_blk = 0
else:
hash_chain_blk = hash_chain[0].block.blk_num
# return the number of blocks required to create this node
num_blks = node.blocks_get_create_num()
# try to find free blocks
free_blks = self.volume.bitmap.find_n_free(num_blks)
if free_blks == None:
raise FSError(NO_FREE_BLOCKS, node=self, file_name=name, extra="want %d" % num_blks)
# update bitmap
for b in free_blks:
self.volume.bitmap.clr_bit(b)
self.volume.bitmap.write_only_bits()
# now create the blocks for this node
new_blk = node.blocks_create_new(free_blks, name, hash_chain_blk, self.block.blk_num, meta_info)
# update my dir
self.block.hash_table[fn_hash] = new_blk
self.block.write()
# add node
self.name_hash[fn_hash].insert(0,node)
self.entries.append(node)
def _create_node(self, node, name, meta_info, update_ts=True):
self.ensure_entries()
# make sure a default meta_info is available
if meta_info == None:
meta_info = MetaInfo()
meta_info.set_current_as_mod_time()
meta_info.set_default_protect()
# check file name
fn = FileName(name, is_intl=self.volume.is_intl)
if not fn.is_valid():
raise FSError(INVALID_FILE_NAME, file_name=name, node=self)
# does already exist an entry in this dir with this name?
if self.has_name(fn):
raise FSError(NAME_ALREADY_EXISTS, file_name=name, node=self)
# calc hash index of name
fn_hash = fn.hash()
hash_chain = self.name_hash[fn_hash]
if len(hash_chain) == 0:
hash_chain_blk = 0
else:
hash_chain_blk = hash_chain[0].block.blk_num
# return the number of blocks required to create this node
num_blks = node.blocks_get_create_num()
# try to find free blocks
free_blks = self.volume.bitmap.alloc_n(num_blks)
if free_blks == None:
raise FSError(NO_FREE_BLOCKS, node=self, file_name=name, extra="want %d" % num_blks)
# now create the blocks for this node
new_blk = node.blocks_create_new(free_blks, name, hash_chain_blk, self.block.blk_num, meta_info)
# dircache: create record for this node
if self.volume.is_dircache:
ok = self._dircache_add_entry(name, meta_info, new_blk, node.get_size(), update_myself=False)
if not ok:
self.delete()
raise FSError(NO_FREE_BLOCKS, node=self, file_name=name, extra="want dcache")
# update my dir
self.block.hash_table[fn_hash] = new_blk
self.block.write()
# add node
self.name_hash[fn_hash].insert(0,node)
self.entries.append(node)
# update time stamps
if update_ts:
self.update_dir_mod_time()
self.volume.update_disk_time()
def update_dir_mod_time(self): mi = MetaInfo() mi.set_current_as_mod_time() self.change_meta_info(mi)