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# Copyright (c) 2007 Chris AtLee <chris@atlee.ca>
# This file is part of GlusterFS.
#
# GlusterFS is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 3 of the License,
# or (at your option) any later version.
#
# GlusterFS is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
from ctypes import *
import collections
#
# Forward declaration of some gluster types
#
class call_frame_t(Structure):
pass
class call_ctx_t(Structure):
pass
class call_pool_t(Structure):
pass
class xlator_t(Structure):
def _getFirstChild(self):
return self.children[0].xlator
firstChild = property(_getFirstChild)
class xlator_list_t(Structure):
pass
class xlator_fops(Structure):
pass
class xlator_mops(Structure):
pass
class glusterfs_ctx_t(Structure):
pass
class list_head(Structure):
pass
class dict_t(Structure):
pass
class inode_table_t(Structure):
pass
class fd_t(Structure):
pass
class iovec(Structure):
_fields_ = [
("iov_base", c_void_p),
("iov_len", c_size_t),
]
def __init__(self, s):
self.iov_base = cast(c_char_p(s), c_void_p)
self.iov_len = len(s)
def getBytes(self):
return string_at(self.iov_base, self.iov_len)
# This is a pthread_spinlock_t
# TODO: what happens to volatile-ness?
gf_lock_t = c_int
uid_t = c_uint32
gid_t = c_uint32
pid_t = c_int32
off_t = c_int64
#
# Function pointer types
#
ret_fn_t = CFUNCTYPE(c_int32, POINTER(call_frame_t), POINTER(call_frame_t),
POINTER(xlator_t), c_int32, c_int32)
fini_fn_t = CFUNCTYPE(None, POINTER(xlator_t))
init_fn_t = CFUNCTYPE(c_int32, POINTER(xlator_t))
event_notify_fn_t = CFUNCTYPE(c_int32, POINTER(xlator_t), c_int32, c_void_p)
list_head._fields_ = [
("next", POINTER(list_head)),
("prev", POINTER(list_head)),
]
call_frame_t._fields_ = [
("root", POINTER(call_ctx_t)),
("parent", POINTER(call_frame_t)),
("next", POINTER(call_frame_t)),
("prev", POINTER(call_frame_t)),
("local", c_void_p),
("this", POINTER(xlator_t)),
("ret", ret_fn_t),
("ref_count", c_int32),
("lock", gf_lock_t),
("cookie", c_void_p),
("op", c_int32),
("type", c_int8),
]
call_ctx_t._fields_ = [
("all_frames", list_head),
("trans", c_void_p),
("pool", call_pool_t),
("unique", c_uint64),
("state", c_void_p),
("uid", uid_t),
("gid", gid_t),
("pid", pid_t),
("frames", call_frame_t),
("req_refs", POINTER(dict_t)),
("rsp_refs", POINTER(dict_t)),
]
xlator_t._fields_ = [
("name", c_char_p),
("type", c_char_p),
("next", POINTER(xlator_t)),
("prev", POINTER(xlator_t)),
("parent", POINTER(xlator_t)),
("children", POINTER(xlator_list_t)),
("fops", POINTER(xlator_fops)),
("mops", POINTER(xlator_mops)),
("fini", fini_fn_t),
("init", init_fn_t),
("notify", event_notify_fn_t),
("options", POINTER(dict_t)),
("ctx", POINTER(glusterfs_ctx_t)),
("itable", POINTER(inode_table_t)),
("ready", c_char),
("private", c_void_p),
]
xlator_list_t._fields_ = [
("xlator", POINTER(xlator_t)),
("next", POINTER(xlator_list_t)),
]
fop_functions = collections.defaultdict(lambda: c_void_p)
fop_function_names = ['lookup', 'forget', 'stat', 'fstat', 'chmod', 'fchmod',
'chown', 'fchown', 'truncate', 'ftruncate', 'utimens', 'access',
'readlink', 'mknod', 'mkdir', 'unlink', 'rmdir', 'symlink',
'rename', 'link', 'create', 'open', 'readv', 'writev', 'flush',
'close', 'fsync', 'opendir', 'readdir', 'closedir', 'fsyncdir',
'statfs', 'setxattr', 'getxattr', 'removexattr', 'lk', 'writedir',
# TODO: Call backs?
]
fop_writev_t = CFUNCTYPE(c_int32, POINTER(call_frame_t), POINTER(xlator_t),
POINTER(fd_t), POINTER(iovec), c_int32,
off_t)
fop_functions['writev'] = fop_writev_t
xlator_fops._fields_ = [(f, fop_functions[f]) for f in fop_function_names]
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