# This file is part of the sos project: https://github.com/sosreport/sos
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# version 2 of the GNU General Public License.
#
# See the LICENSE file in the source distribution for further information.

from sos.plugins import Plugin, RedHatPlugin, DebianPlugin, UbuntuPlugin
import os.path


class Gfs2(Plugin, RedHatPlugin, DebianPlugin, UbuntuPlugin):
    """GFS2 (Global Filesystem 2)"""

    plugin_name = "gfs2"
    profiles = ("cluster", )
    packages = ["gfs2-utils"]

    option_list = [
        ("lockdump",
         "capture lock dumps for all GFS2 filesystems",
         "slow", False),
    ]

    debugfs_path = "/sys/kernel/debug"
    _debugfs_cleanup = False

    def setup(self):
        self.add_copy_spec([
            "/sys/fs/gfs2/*/withdraw"
        ])
        self.add_cmd_output([
            "gfs_control ls -n",
            "gfs_control dump"
        ])

        if self.get_option("gfs2lockdump"):
            if self._mount_debug():
                self.add_copy_spec(["/sys/kernel/debug/gfs2/*"])

    def _mount_debug(self):
        if not os.path.ismount(self.debugfs_path):
            self._debugfs_cleanup = True
            r = self.call_ext_prog("mount -t debugfs debugfs %s"
                                   % self.debugfs_path)
            if r["status"] != 0:
                self._log_error("debugfs not mounted and mount attempt failed")
                self._debugfs_cleanup = False
        return os.path.ismount(self.debugfs_path)

    def postproc(self):
        if self._debugfs_cleanup and os.path.ismount(self.debugfs_path):
            r = self.call_ext_prog("umount %s" % self.debugfs_path)
            if r["status"] != 0:
                self._log_error("could not unmount %s" % self.debugfs_path)
        return

# vim: et ts=4 sw=4