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#  Copyright (C) 2017-2018  Red Hat, Inc. <http://www.redhat.com>
#
#  This program 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 2 of the License, or
#  any later version.
#
#  This program 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, write to the Free Software Foundation, Inc.,
#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

from glusto.core import Glusto as g
from glustolibs.gluster.gluster_base_class import (GlusterBaseClass,
                                                   runs_on)
from glustolibs.gluster.quota_ops import (quota_enable,
                                          quota_limit_usage,
                                          quota_fetch_list)
from glustolibs.io.utils import list_all_files_and_dirs_mounts
from glustolibs.gluster.exceptions import ExecutionError
from glustolibs.misc.misc_libs import upload_scripts
from glustolibs.io.utils import validate_io_procs


@runs_on([['distributed'], ['glusterfs', 'nfs', 'cifs']])
class QuotaListPathValues(GlusterBaseClass):

    @classmethod
    def setUpClass(cls):
        """
        setup volume, mount volume and initialize necessary variables
        which is used in tests
        """

        # calling GlusterBaseClass setUpClass
        GlusterBaseClass.setUpClass.im_func(cls)

        # Upload io scripts for running IO on mounts
        g.log.info("Upload io scripts to clients %s for running IO on mounts",
                   cls.clients)
        script_local_path = ("/usr/share/glustolibs/io/scripts/"
                             "file_dir_ops.py")
        cls.script_upload_path = ("/usr/share/glustolibs/io/scripts/"
                                  "file_dir_ops.py")
        ret = upload_scripts(cls.clients, [script_local_path])
        if not ret:
            raise ExecutionError("Failed to upload IO scripts to clients")
        g.log.info("Successfully uploaded IO scripts to clients %s",
                   cls.clients)

        # Overriding the volume type to specifically test the volume type
        if cls.volume_type == "distributed":
            cls.volume['voltype'] = {
                'type': 'distributed',
                'dist_count': 1,
                'transport': 'tcp'}

        # Setup Volume and Mount Volume
        g.log.info("Starting to Setup and Mount Volume %s",
                   cls.volname)
        ret = cls.setup_volume_and_mount_volume(mounts=cls.mounts)
        if not ret:
            raise ExecutionError("Failed to Setup_Volume and Mount_Volume")
        g.log.info("Successful in Setup and Mount Volume %s", cls.volname)

    @classmethod
    def tearDownClass(cls):
        """
        Clean up the volume and umount volume from client
        """

        # stopping the volume
        g.log.info("Starting to Unmount Volume and Cleanup Volume")
        ret = cls.unmount_volume_and_cleanup_volume(mounts=cls.mounts)
        if not ret:
            raise ExecutionError("Failed to Unmount Volume and Cleanup Volume")
        g.log.info("Successful in Unmount Volume and Cleanup Volume")

        # calling GlusterBaseClass tearDownClass
        GlusterBaseClass.tearDownClass.im_func(cls)

    def test_quota_single_brick_volume(self):
        """
        Verifying directory quota functionality on a single brick volume.

        * Create a volume with single brick (1x1) start and mount it
        * Enable quota on the volume
        * Set a limit of 1GB on this volume
        * Create some directories and files in the mount point
        * Execute a quota list command

        """

        # Enable Quota
        g.log.info("Enabling quota on the volume %s", self.volname)
        ret, _, _ = quota_enable(self.mnode, self.volname)
        self.assertEqual(ret, 0, ("Failed to enable quota on the "
                                  "volume %s", self.volname))
        g.log.info("Successfully enabled quota on the volume %s", self.volname)

        # Path to set quota limit
        path = "/"

        # Set Quota limit on the root of the volume
        g.log.info("Set Quota Limit on the path %s of the volume %s",
                   path, self.volname)
        ret, _, _ = quota_limit_usage(self.mnode, self.volname,
                                      path=path, limit="1GB")
        self.assertEqual(ret, 0, ("Failed to set quota limit on path %s of "
                                  "the volume %s", path, self.volname))
        g.log.info("Successfully set the Quota limit on %s of the volume %s",
                   path, self.volname)

        # Starting IO on the mounts
        all_mounts_procs = []
        count = 1
        for mount_obj in self.mounts:
            g.log.info("Starting IO on %s:%s", mount_obj.client_system,
                       mount_obj.mountpoint)
            cmd = ("python %s create_deep_dirs_with_files "
                   "--dirname-start-num %d "
                   "--dir-depth 2 "
                   "--dir-length 20 "
                   "--max-num-of-dirs 5 "
                   "--num-of-files 5 %s" % (self.script_upload_path,
                                            count,
                                            mount_obj.mountpoint))
            proc = g.run_async(mount_obj.client_system, cmd,
                               user=mount_obj.user)
            all_mounts_procs.append(proc)
            count = count + 10

        # Validate IO
        g.log.info("Validating IO's")
        ret = validate_io_procs(all_mounts_procs, self.mounts)
        self.assertTrue(ret, "IO failed on some of the clients")
        g.log.info("Successfully validated all io's")

        # Get Quota list on Volume
        g.log.info("Get Quota list for the volume %s", self.volname)
        quota_list1 = quota_fetch_list(self.mnode, self.volname)
        self.assertIsNotNone(quota_list1, ("Failed to get the quota list for "
                                           "the volume %s", self.volname))
        self.assertIn(path, quota_list1.keys(),
                      ("%s not part of the ""quota list %s even if "
                       "it is set on the volume %s", path,
                       quota_list1, self.volname))
        g.log.info("Successfully listed quota list %s of the "
                   "volume %s", quota_list1, self.volname)

        # List all files and dirs created
        g.log.info("List all files and directories:")
        ret = list_all_files_and_dirs_mounts(self.mounts)
        self.assertTrue(ret, "Failed to list all files and dirs")
        g.log.info("Listing all files and directories is successful")