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#
# Copyright (c) 2011-2014 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.
#
import os
from ctypes import CDLL, RTLD_GLOBAL, get_errno, byref, c_ulong
from ctypes.util import find_library
from syncdutils import ChangelogException, ChangelogHistoryNotAvailable
from py2py3 import gr_cl_history_changelog, gr_cl_done, gr_create_string_buffer
from py2py3 import gr_cl_register, gr_cl_history_done, bytearray_to_str
libgfc = CDLL(
find_library("gfchangelog"),
mode=RTLD_GLOBAL,
use_errno=True
)
def _raise_changelog_err():
errn = get_errno()
raise ChangelogException(errn, os.strerror(errn))
def _init():
if libgfc.gf_changelog_init(None) == -1:
_raise_changelog_err()
def register(brick, path, log_file, log_level, retries=0):
_init()
ret = gr_cl_register(libgfc, brick, path, log_file, log_level, retries)
if ret == -1:
_raise_changelog_err()
def scan():
ret = libgfc.gf_changelog_scan()
if ret == -1:
_raise_changelog_err()
def startfresh():
ret = libgfc.gf_changelog_start_fresh()
if ret == -1:
_raise_changelog_err()
def getchanges():
def clsort(cfile):
return cfile.split('.')[-1]
changes = []
buf = gr_create_string_buffer(4096)
call = libgfc.gf_changelog_next_change
while True:
ret = call(buf, 4096)
if ret in (0, -1):
break
# py2 and py3 compatibility
result = bytearray_to_str(buf.raw[:ret - 1])
changes.append(result)
if ret == -1:
_raise_changelog_err()
# cleanup tracker
startfresh()
return sorted(changes, key=clsort)
def done(clfile):
ret = gr_cl_done(libgfc, clfile)
if ret == -1:
_raise_changelog_err()
def history_scan():
ret = libgfc.gf_history_changelog_scan()
if ret == -1:
_raise_changelog_err()
return ret
def history_changelog(changelog_path, start, end, num_parallel):
actual_end = c_ulong()
ret = gr_cl_history_changelog(libgfc, changelog_path, start, end,
num_parallel, byref(actual_end))
if ret == -1:
_raise_changelog_err()
if ret == -2:
raise ChangelogHistoryNotAvailable()
return (ret, actual_end.value)
def history_startfresh():
ret = libgfc.gf_history_changelog_start_fresh()
if ret == -1:
_raise_changelog_err()
def history_getchanges():
def clsort(cfile):
return cfile.split('.')[-1]
changes = []
buf = gr_create_string_buffer(4096)
call = libgfc.gf_history_changelog_next_change
while True:
ret = call(buf, 4096)
if ret in (0, -1):
break
# py2 and py3 compatibility
result = bytearray_to_str(buf.raw[:ret - 1])
changes.append(result)
if ret == -1:
_raise_changelog_err()
return sorted(changes, key=clsort)
def history_done(clfile):
ret = gr_cl_history_done(libgfc, clfile)
if ret == -1:
_raise_changelog_err()
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