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# -*- coding: utf-8 -*-
# Copyright (c) 2015 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, get_errno, create_string_buffer, c_ulong, byref
from ctypes import RTLD_GLOBAL
class ChangelogException(OSError):
pass
libgfc = CDLL("libgfchangelog.so", use_errno=True, mode=RTLD_GLOBAL)
def raise_oserr(prefix=None):
errn = get_errno()
prefix_or_empty = prefix + ": " if prefix else ""
raise ChangelogException(errn, prefix_or_empty + os.strerror(errn))
def cl_init():
ret = libgfc.gf_changelog_init(None)
if ret == -1:
raise_oserr(prefix="gf_changelog_init")
def cl_register(brick, path, log_file, log_level, retries=0):
ret = libgfc.gf_changelog_register(brick, path, log_file,
log_level, retries)
if ret == -1:
raise_oserr(prefix="gf_changelog_register")
def cl_history_scan():
ret = libgfc.gf_history_changelog_scan()
if ret == -1:
raise_oserr(prefix="gf_history_changelog_scan")
return ret
def cl_history_changelog(changelog_path, start, end, num_parallel):
actual_end = c_ulong()
ret = libgfc.gf_history_changelog(changelog_path, start, end,
num_parallel,
byref(actual_end))
if ret == -1:
raise_oserr(prefix="gf_history_changelog")
return actual_end.value
def cl_history_startfresh():
ret = libgfc.gf_history_changelog_start_fresh()
if ret == -1:
raise_oserr(prefix="gf_history_changelog_start_fresh")
def cl_history_getchanges():
""" remove hardcoding for path name length """
def clsort(f):
return f.split('.')[-1]
changes = []
buf = create_string_buffer('\0', 4096)
while True:
ret = libgfc.gf_history_changelog_next_change(buf, 4096)
if ret in (0, -1):
break
changes.append(buf.raw[:ret - 1])
if ret == -1:
raise_oserr(prefix="gf_history_changelog_next_change")
return sorted(changes, key=clsort)
def cl_history_done(clfile):
ret = libgfc.gf_history_changelog_done(clfile)
if ret == -1:
raise_oserr(prefix="gf_history_changelog_done")
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