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#
# Copyright (c) 2018 Red Hat, Inc. <http://www.redhat.com>
# This file is part of GlusterFS.
# This file is licensed to you under your choice of the GNU Lesser
# General Public License, version 3 or any later version (LGPLv3 or
# later), or the GNU General Public License, version 2 (GPLv2), in all
# cases as published by the Free Software Foundation.
#
# All python2/python3 compatibility routines
import sys
import os
import stat
import struct
from ctypes import create_string_buffer
def umask():
return os.umask(0)
if sys.version_info >= (3,):
def pipe():
(r, w) = os.pipe()
os.set_inheritable(r, True)
os.set_inheritable(w, True)
return (r, w)
# Raw conversion of bytearray to string. Used in the cases where
# buffer is created by create_string_buffer which is a 8-bit char
# array and passed to syscalls to fetch results. Using encode/decode
# doesn't work as it converts to string altering the size.
def bytearray_to_str(byte_arr):
return ''.join([chr(b) for b in byte_arr])
# Raw conversion of string to bytes. This is required to convert
# back the string into bytearray(c char array) to use in struc
# pack/unpacking. Again encode/decode can't be used as it
# converts it alters size.
def str_to_bytearray(string):
return bytes([ord(c) for c in string])
def gr_create_string_buffer(size):
return create_string_buffer(b'\0', size)
def gr_query_xattr(cls, path, size, syscall, attr=None):
if attr:
return cls._query_xattr(path.encode(), size, syscall,
attr.encode())
else:
return cls._query_xattr(path.encode(), size, syscall)
def gr_lsetxattr(cls, path, attr, val):
return cls.libc.lsetxattr(path.encode(), attr.encode(), val,
len(val), 0)
def gr_lremovexattr(cls, path, attr):
return cls.libc.lremovexattr(path.encode(), attr.encode())
def gr_cl_register(cls, brick, path, log_file, log_level, retries):
return cls._get_api('gf_changelog_register')(brick.encode(),
path.encode(),
log_file.encode(),
log_level, retries)
def gr_cl_done(cls, clfile):
return cls._get_api('gf_changelog_done')(clfile.encode())
def gr_cl_history_changelog(cls, changelog_path, start, end, num_parallel,
actual_end):
return cls._get_api('gf_history_changelog')(changelog_path.encode(),
start, end, num_parallel,
actual_end)
def gr_cl_history_done(cls, clfile):
return cls._get_api('gf_history_changelog_done')(clfile.encode())
# regular file
def entry_pack_reg(cls, gf, bn, mo, uid, gid):
bn_encoded = bn.encode()
blen = len(bn_encoded)
return struct.pack(cls._fmt_mknod(blen),
uid, gid, gf.encode(), mo, bn_encoded,
stat.S_IMODE(mo), 0, umask())
def entry_pack_reg_stat(cls, gf, bn, st):
bn_encoded = bn.encode()
blen = len(bn_encoded)
mo = st['mode']
return struct.pack(cls._fmt_mknod(blen),
st['uid'], st['gid'],
gf.encode(), mo, bn_encoded,
stat.S_IMODE(mo), 0, umask())
# mkdir
def entry_pack_mkdir(cls, gf, bn, mo, uid, gid):
bn_encoded = bn.encode()
blen = len(bn_encoded)
return struct.pack(cls._fmt_mkdir(blen),
uid, gid, gf.encode(), mo, bn_encoded,
stat.S_IMODE(mo), umask())
# symlink
def entry_pack_symlink(cls, gf, bn, lnk, st):
bn_encoded = bn.encode()
blen = len(bn_encoded)
lnk_encoded = lnk.encode()
llen = len(lnk_encoded)
return struct.pack(cls._fmt_symlink(blen, llen),
st['uid'], st['gid'],
gf.encode(), st['mode'], bn_encoded,
lnk_encoded)
else:
def pipe():
(r, w) = os.pipe()
return (r, w)
# Raw conversion of bytearray to string
def bytearray_to_str(byte_arr):
return byte_arr
# Raw conversion of string to bytearray
def str_to_bytearray(string):
return string
def gr_create_string_buffer(size):
return create_string_buffer('\0', size)
def gr_query_xattr(cls, path, size, syscall, attr=None):
if attr:
return cls._query_xattr(path, size, syscall, attr)
else:
return cls._query_xattr(path, size, syscall)
def gr_lsetxattr(cls, path, attr, val):
return cls.libc.lsetxattr(path, attr, val, len(val), 0)
def gr_lremovexattr(cls, path, attr):
return cls.libc.lremovexattr(path, attr)
def gr_cl_register(cls, brick, path, log_file, log_level, retries):
return cls._get_api('gf_changelog_register')(brick, path, log_file,
log_level, retries)
def gr_cl_done(cls, clfile):
return cls._get_api('gf_changelog_done')(clfile)
def gr_cl_history_changelog(cls, changelog_path, start, end, num_parallel,
actual_end):
return cls._get_api('gf_history_changelog')(changelog_path, start, end,
num_parallel, actual_end)
def gr_cl_history_done(cls, clfile):
return cls._get_api('gf_history_changelog_done')(clfile)
# regular file
def entry_pack_reg(cls, gf, bn, mo, uid, gid):
blen = len(bn)
return struct.pack(cls._fmt_mknod(blen),
uid, gid, gf, mo, bn,
stat.S_IMODE(mo), 0, umask())
def entry_pack_reg_stat(cls, gf, bn, st):
blen = len(bn)
mo = st['mode']
return struct.pack(cls._fmt_mknod(blen),
st['uid'], st['gid'],
gf, mo, bn,
stat.S_IMODE(mo), 0, umask())
# mkdir
def entry_pack_mkdir(cls, gf, bn, mo, uid, gid):
blen = len(bn)
return struct.pack(cls._fmt_mkdir(blen),
uid, gid, gf, mo, bn,
stat.S_IMODE(mo), umask())
# symlink
def entry_pack_symlink(cls, gf, bn, lnk, st):
blen = len(bn)
llen = len(lnk)
return struct.pack(cls._fmt_symlink(blen, llen),
st['uid'], st['gid'],
gf, st['mode'], bn, lnk)
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