# Copyright (c) 2015-2016 Western Digital Corporation or its affiliates.

#

# 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 (at your option) 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.

#

#   Author: Chaitanya Kulkarni <chaitanya.kulkarni@hgst.com>

#

"""

NVMe Namespace Management Testcase:-

    1. Create Maximum number of Namespaces and validate.

    2. Attach all Namespaces to controller.

    3. Run IOs on Namespace under test.

    4. Detach Maximum number of Namespaces from controller.

    5. Delete all Namespaces.

"""

import time

from nose.tools import assert_equal

from nvme_test import TestNVMe

class TestNVMeCreateMaxNS(TestNVMe):

    """

    Represents Attach, Detach namespace testcase.

        - Attributes:

              - dps : data protection information.

              - flbas : LBA format information.

              - nsze : namespace size.

              - ncap : namespace capacity.

              - ctrl_id : controller id.

    """

    def __init__(self):

        """ Pre Section for TestNVMeAttachDetachNSCmd """

        TestNVMe.__init__(self)

        self.dps = 0

        self.flbas = 0

        self.nsze = int(self.get_ncap() / self.get_format() / self.get_max_ns())

        self.ncap = self.nsze

        self.setup_log_dir(self.__class__.__name__)

        self.max_ns = self.get_max_ns()

        self.ctrl_id = self.get_ctrl_id()

        self.delete_all_ns()

        time.sleep(1)

    def __del__(self):

        """

        Post Section for TestNVMeAttachDetachNSCmd

            - Create primary namespace.

            - Atttach it to controller.

            - Call super class's destructor.

        """

        assert_equal(self.create_and_validate_ns(self.default_nsid,

                                                 self.nsze,

                                                 self.ncap,

                                                 self.flbas,

                                                 self.dps), 0)

        self.attach_ns(self.ctrl_id, self.default_nsid)

        TestNVMe.__del__(self)

    def test_attach_detach_ns(self):

        """ Testcase main """

        for nsid in range(1, self.max_ns):

            print("##### Creating " + str(nsid))

            err = self.create_and_validate_ns(nsid,

                                              self.nsze,

                                              self.ncap,

                                              self.flbas,

                                              self.dps)

            assert_equal(err, 0)

            print("##### Attaching " + str(nsid))

            assert_equal(self.attach_ns(self.ctrl_id, nsid), 0)

            print("##### Running IOs in " + str(nsid))

            self.run_ns_io(nsid, 0)

        for nsid in range(1, self.max_ns):

            print("##### Detaching " + str(nsid))

            assert_equal(self.detach_ns(self.ctrl_id, nsid), 0)

            print("#### Deleting " + str(nsid))

            assert_equal(self.delete_and_validate_ns(nsid), 0)

        self.nvme_reset_ctrl()