Unittest framework based on nvme-cli.

Commit Message

Chaitanya Kulkarni Nov. 1, 2016, 6:01 a.m. UTC

From: Chaitanya Kulkarni <[e-mail]>

Signed-off-by: Chaitanya Kulkarni <[e-mail]>
---
 Makefile                            |   5 +-
 tests/Makefile                      |  48 +++++
 tests/README                        |  84 ++++++++
 tests/TODO                          |  14 ++
 tests/config.json                   |   5 +
 tests/nvme_attach_detach_ns_test.py |  90 ++++++++
 tests/nvme_compare_test.py          |  79 ++++++++
 tests/nvme_create_max_ns_test.py    |  97 +++++++++
 tests/nvme_error_log_test.py        |  86 ++++++++
 tests/nvme_flush_test.py            |  61 ++++++
 tests/nvme_format_test.py           | 145 +++++++++++++
 tests/nvme_get_features_test.py     | 103 ++++++++++
 tests/nvme_read_write_test.py       |  72 +++++++
 tests/nvme_simple_template_test.py  |  55 +++++
 tests/nvme_smart_log_test.py        |  86 ++++++++
 tests/nvme_test.py                  | 395 ++++++++++++++++++++++++++++++++++++
 tests/nvme_test_io.py               |  99 +++++++++
 tests/nvme_test_logger.py           |  52 +++++
 tests/nvme_writeuncor_test.py       |  76 +++++++
 tests/nvme_writezeros_test.py       | 102 ++++++++++
 20 files changed, 1753 insertions(+), 1 deletion(-)
 create mode 100644 tests/Makefile
 create mode 100644 tests/README
 create mode 100644 tests/TODO
 create mode 100644 tests/config.json
 create mode 100644 tests/nvme_attach_detach_ns_test.py
 create mode 100644 tests/nvme_compare_test.py
 create mode 100644 tests/nvme_create_max_ns_test.py
 create mode 100644 tests/nvme_error_log_test.py
 create mode 100644 tests/nvme_flush_test.py
 create mode 100644 tests/nvme_format_test.py
 create mode 100644 tests/nvme_get_features_test.py
 create mode 100644 tests/nvme_read_write_test.py
 create mode 100644 tests/nvme_simple_template_test.py
 create mode 100644 tests/nvme_smart_log_test.py
 create mode 100644 tests/nvme_test.py
 create mode 100644 tests/nvme_test_io.py
 create mode 100644 tests/nvme_test_logger.py
 create mode 100644 tests/nvme_writeuncor_test.py
 create mode 100644 tests/nvme_writezeros_test.py

Comments

Chaitanya Kulkarni Nov. 1, 2016, 6:05 a.m. UTC | #1

Hi,

Introducing nvme-cli based unit test framework. All the test cases use
commands implemented in nvme-cli.

The goal is to have simple, lightweight, and easily expandable
framework which we can used to
develop various categories of unit tests based on nvme-cli and improve
overall development.

Over the period of time since release of the nvme-cli various test
cases are developed which are now integral part of our device deriver
testing.

These test cases are evolved around nvme-cli and can be used for
nvme-cli testing.

I would like to take this opportunity and share first set of test
cases which has most frequently used generic NVMe features from cli :-

1. nvme_attach_detach_ns_test.py
2. nvme_compare_test.py
3. nvme_create_max_ns_test.py
4. nvme_error_log_test.py
5. nvme_flush_test.py
6. nvme_format_test.py
7. nvme_get_features_test.py
8. nvme_read_write_test.py
9. nvme_smart_log_test.py
10. nvme_writeuncor_test.py
11. nvme_writezeros_test.py

Please have a look at README for an overview and process of adding new
test case.
Framework also has a sample skeleton which can be used readily to
write new testcard.

Assumptions for current implementation :-
1. nvme-cli is already installed on the system.
2. Only one test case can be executed at any given time.
3. Each test case has logical PRE, RUN and POST sections.
4. It assumes that driver is loaded and default namespace
"/dev/nvme0n1" is present.

(It is easy to add driver load/unload in pre and post sections of test
cases in as per requirement.)

I’d like to know what features, test cases most people would want as a
part of this framework.
Any suggestions are welcome, I'd like to implement them.

On approval I would like to submit more test cases to enhance the framework.

Regards,
Chaitanya

On Mon, Oct 31, 2016 at 11:01 PM, Chaitanya Kulkarni
<[e-mail]> wrote:
>
> From: Chaitanya Kulkarni <[e-mail]>
>
> Signed-off-by: Chaitanya Kulkarni <[e-mail]>
> ---
>  Makefile                            |   5 +-
>  tests/Makefile                      |  48 +++++
>  tests/README                        |  84 ++++++++
>  tests/TODO                          |  14 ++
>  tests/config.json                   |   5 +
>  tests/nvme_attach_detach_ns_test.py |  90 ++++++++
>  tests/nvme_compare_test.py          |  79 ++++++++
>  tests/nvme_create_max_ns_test.py    |  97 +++++++++
>  tests/nvme_error_log_test.py        |  86 ++++++++
>  tests/nvme_flush_test.py            |  61 ++++++
>  tests/nvme_format_test.py           | 145 +++++++++++++
>  tests/nvme_get_features_test.py     | 103 ++++++++++
>  tests/nvme_read_write_test.py       |  72 +++++++
>  tests/nvme_simple_template_test.py  |  55 +++++
>  tests/nvme_smart_log_test.py        |  86 ++++++++
>  tests/nvme_test.py                  | 395 ++++++++++++++++++++++++++++++++++++
>  tests/nvme_test_io.py               |  99 +++++++++
>  tests/nvme_test_logger.py           |  52 +++++
>  tests/nvme_writeuncor_test.py       |  76 +++++++
>  tests/nvme_writezeros_test.py       | 102 ++++++++++
>  20 files changed, 1753 insertions(+), 1 deletion(-)
>  create mode 100644 tests/Makefile
>  create mode 100644 tests/README
>  create mode 100644 tests/TODO
>  create mode 100644 tests/config.json
>  create mode 100644 tests/nvme_attach_detach_ns_test.py
>  create mode 100644 tests/nvme_compare_test.py
>  create mode 100644 tests/nvme_create_max_ns_test.py
>  create mode 100644 tests/nvme_error_log_test.py
>  create mode 100644 tests/nvme_flush_test.py
>  create mode 100644 tests/nvme_format_test.py
>  create mode 100644 tests/nvme_get_features_test.py
>  create mode 100644 tests/nvme_read_write_test.py
>  create mode 100644 tests/nvme_simple_template_test.py
>  create mode 100644 tests/nvme_smart_log_test.py
>  create mode 100644 tests/nvme_test.py
>  create mode 100644 tests/nvme_test_io.py
>  create mode 100644 tests/nvme_test_logger.py
>  create mode 100644 tests/nvme_writeuncor_test.py
>  create mode 100644 tests/nvme_writezeros_test.py
>
> diff --git a/Makefile b/Makefile
> index 117cbbe..33c7190 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -46,6 +46,9 @@ nvme.o: nvme.c nvme.h nvme-print.h nvme-ioctl.h argconfig.h suffix.h nvme-lightn
>  doc: $(NVME)
>         $(MAKE) -C Documentation
>
> +test:
> +       $(MAKE) -C tests/ run
> +
>  all: doc
>
>  clean:
> @@ -136,4 +139,4 @@ rpm: dist
>         $(RPMBUILD) -ta nvme-$(NVME_VERSION).tar.gz
>
>  .PHONY: default doc all clean clobber install-man install-bin install
> -.PHONY: dist pkg dist-orig deb deb-light rpm FORCE
> +.PHONY: dist pkg dist-orig deb deb-light rpm FORCE test
> diff --git a/tests/Makefile b/tests/Makefile
> new file mode 100644
> index 0000000..c0f9f31
> --- /dev/null
> +++ b/tests/Makefile
> @@ -0,0 +1,48 @@
> +###############################################################################
> +#
> +#    Makefile : Allows user to run testcases, generate documentation, and
> +#               perform static code analysis.
> +#
> +###############################################################################
> +
> +NOSE2_OPTIONS="--verbose"
> +
> +help: all
> +
> +all:
> +       @echo "Usage:"
> +       @echo
> +       @echo "  make run         - Run all testcases."
> +       @echo "  make doc         - Generate Documentation."
> +       @echo "  make cleanall    - removes *pyc, documentation."
> +       @echo "  make static_check- runs pep8, flake8, pylint on code."
> +
> +doc:
> +       @epydoc -v --output=Documentation *.py
> +
> +run:
> +       @for i in `ls *.py`; \
> +       do \
> +               echo "Running $${i}"; \
> +               TESTCASE_NAME=`echo $${i} | cut -f 1 -d '.'`; \
> +               nose2 ${NOSE2_OPTIONS} $${TESTCASE_NAME}; \
> +       done
> +
> +static_check:
> +       @for i in `ls *.py`; \
> +       do \
> +               echo "Pylint :- " ; \
> +               printf "%10s    " $${i}; \
> +               pylint $${i} 2>&1  | grep "^Your code" |  awk '{print $$7}';\
> +               echo "--------------------------------------------";\
> +               pep8 $${i}; \
> +               echo "pep8 :- "; \
> +               echo "flake8 :- "; \
> +               flake8 $${i}; \
> +       done
> +
> +cleanall: clean
> +       @rm -fr *.pyc Documentation
> +
> +clean:
> +       @rm -fr *.pyc
> diff --git a/tests/README b/tests/README
> new file mode 100644
> index 0000000..70686d8
> --- /dev/null
> +++ b/tests/README
> @@ -0,0 +1,84 @@
> +nvmetests
> +=========
> +
> +    This contains NVMe unit tests framework. The purpose of this framework
> +    to use nvme cli and test various supported commands and scenarios for
> +    NVMe device.
> +
> +    In current implementation this framework uses nvme cli to
> +    interact with underlying controller/namespace.
> +
> +1. Common Package Dependencies
> +------------------------------
> +
> +    1. Python(>= 2.7.5 or >= 3.3)
> +    2. nose2(Installation guide http://nose2.readthedocs.io/)
> +    3. nvme-cli(https://github.com/linux-nvme/nvme-cli.git)
> +
> +2. Overview
> +-----------
> +
> +    This framework follows simple class hierarchy. Each test file contains
> +    one test. Each test is direct subclass or indirect subclass of TestNVMe
> +    class which represents one testcase. To write a new testcase one can copy
> +    existing template "nvme_simple_template_test.py" and start adding new
> +    testcase specific functionality. For detailed information please look into
> +    section 3.
> +
> +    For more information about tests, class hierarchy and code please refer :-
> +
> +    1. Documentation :- html/
> +    2. Class Index :-  html/index.html
> +    3. Class Hierarchy :- html/class-tree.html
> +
> +    For each testcase it will create log directory mentioned in
> +    configuration file. This directory will be used for a temporary files
> +    and storing execution logs of each testcases. Current implementation stores
> +    stdout and stderr for each testcase under log directory, e.g. :-
> +
> +        $ tree nvmetests/
> +        nvmetests/
> +        ├── TestNVMeAttachDetachNSCmd
> +        │   ├── stderr.log
> +        │   └── stdout.log
> +        ├── TestNVMeFlushCmd
> +        │   ├── stderr.log
> +        │   └── stdout.log
> +        └── TestNVMeFormatCmd
> +            ├── stderr.log
> +            └── stdout.log
> +                 .
> +                 .
> +                 .
> +
> +3. Walk-Through Example for writing a new testcase
> +--------------------------------------------------
> +    1. Copy simple test template file from current directory
> +       with appropriate name, replace "simple_template" with testcase name
> +       in new file name. Update config.json if necessary.
> +    2. Write a testcase main function, make sure its name is starting with
> +       test_*.
> +    3. Based on the requirement one can inherit TestNVMe or TestNVMeIO
> +       class.
> +    4. Write test precondition code into __init__. Make sure you are calling
> +       super class __init__.
> +    5. Write test post condition code into __del__. Make sure you are calling
> +       super class __del__.
> +    6. Before writing a new function have a look into TestNVMe to see if it
> +       can be reused.
> +    7. Once testcase is ready make sure :-
> +           a. Run pep8, flake8, pylint on the testcase and fix errors/warnings.
> +              -Example "$ make static_check" will run pep8, flake8 and pylint on
> +              all the python files in current directory.
> +           b. Execute make doc to generate the documentation.
> +              -Example "$ make doc" will create and update existing
> +              documentation.
> +
> +4. Running testcases with framework
> +-----------------------------------
> +    1. Running single testcase with nose2 :-
> +       $ nose2 --verbose nvme_writezeros_test
> +       $ nose2 --verbose nvme_read_write_test
> +
> +    2. Running all the testcases with Makefile :-
> +       $ make run
> diff --git a/tests/TODO b/tests/TODO
> new file mode 100644
> index 0000000..69806a9
> --- /dev/null
> +++ b/tests/TODO
> @@ -0,0 +1,14 @@
> +nvmetests TODO List
> +===================
> +
> +Feature list (with priority):-
> +------------------------------
> +    1. PRE and POST section improvements :-
> +        a. Add functionality to load and unload driver.
> +        b. Make sure default namespace is present, if not create one before
> +           any test begins. Read the default namespace size from config file.
> +    2. Add system statistics collection in PRE and POST section of testcase.
> +    3. Create execution summary file under log directory at the end of each
> +       run.
> +    4. Add tracing functionality to track overall and current progress of the
> +       testcase.
> diff --git a/tests/config.json b/tests/config.json
> new file mode 100644
> index 0000000..098fba8
> --- /dev/null
> +++ b/tests/config.json
> @@ -0,0 +1,5 @@
> +{
> +       "controller" : "/dev/nvme0",
> +        "ns1": "/dev/nvme0n1",
> +       "log_dir": "nvmetests/"
> +}
> diff --git a/tests/nvme_attach_detach_ns_test.py b/tests/nvme_attach_detach_ns_test.py
> new file mode 100644
> index 0000000..92a82dd
> --- /dev/null
> +++ b/tests/nvme_attach_detach_ns_test.py
> @@ -0,0 +1,90 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Namespace Management Testcase:-
> +
> +    1. Create Namespace and validate.
> +    2. Attach Namespace to controller.
> +    3. Run IOs on Namespace under test.
> +    4. Detach Namespace from controller.
> +    5. Delete Namespace.
> +"""
> +
> +import time
> +from nose.tools import assert_equal
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeAttachDetachNSCmd(TestNVMe):
> +
> +    """
> +    Represents Attach, Detach namespace testcase.
> +
> +        - Attributes:
> +              - dps : data protection information.
> +              - flabs : 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 = 0x1400000
> +        self.ncap = 0x1400000
> +        self.setup_log_dir(self.__class__.__name__)
> +        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 """
> +        err = self.create_and_validate_ns(self.default_nsid,
> +                                          self.nsze,
> +                                          self.ncap,
> +                                          self.flbas,
> +                                          self.dps)
> +        assert_equal(err, 0)
> +        assert_equal(self.attach_ns(self.ctrl_id, self.default_nsid), 0)
> +
> +        self.run_ns_io(self.default_nsid, 0)
> +
> +        assert_equal(self.detach_ns(self.ctrl_id, self.default_nsid), 0)
> +        assert_equal(self.delete_and_validate_ns(self.default_nsid), 0)
> +        self.nvme_reset_ctrl()
> diff --git a/tests/nvme_compare_test.py b/tests/nvme_compare_test.py
> new file mode 100644
> index 0000000..34c140d
> --- /dev/null
> +++ b/tests/nvme_compare_test.py
> @@ -0,0 +1,79 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Compare Command Testcase:-
> +
> +    1. Create a data file 1 with pattern 1515 to write.
> +    2. Create a data file 2 with pattern 2525 to compare with.
> +    3. Write a block of data pattern using data file1.
> +    4. Compare written block to data file 2's pattern; shall fail.
> +    5. Compare written block to data file1's pattern; shall pass.
> +
> +"""
> +
> +from nose.tools import assert_equal, assert_not_equal
> +from nvme_test_io import TestNVMeIO
> +
> +
> +class TestNVMeCompareCmd(TestNVMeIO):
> +
> +    """
> +    Represents Compare Testcase. Inherits TestNVMeIO class.
> +
> +        - Attributes:
> +              - data_size : data size to perform IO.
> +              - start_block : starting block of to perform IO.
> +              - compare_file : data file to use in nvme comapre commmand.
> +              - test_log_dir : directory for logs, temp files.
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeCompareCmd """
> +        TestNVMeIO.__init__(self)
> +        self.data_size = 1024
> +        self.start_block = 1023
> +        self.setup_log_dir(self.__class__.__name__)
> +        self.compare_file = self.test_log_dir + "/" + "compare_file.txt"
> +        self.write_file = self.test_log_dir + "/" + self.write_file
> +        self.create_data_file(self.write_file, self.data_size, "15")
> +        self.create_data_file(self.compare_file, self.data_size, "25")
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeCompareCmd """
> +        TestNVMeIO.__del__(self)
> +
> +    def nvme_compare(self, cmp_file):
> +        """ Wrapper for nvme compare command.
> +           - Args:
> +               - cmp_file : data file used in nvme compare command.
> +           - Returns:
> +               - return code of the nvme compare command.
> +        """
> +        compare_cmd = "nvme compare " + self.ns1 + " --start-block=" + \
> +                      str(self.start_block) + " --block-count=" + \
> +                      str(self.block_count) + " --data-size=" + \
> +                      str(self.data_size) + " --data=" + cmp_file
> +        return self.exec_cmd(compare_cmd)
> +
> +    def test_nvme_compare(self):
> +        """ Testcase main """
> +        assert_equal(self.nvme_write(), 0)
> +        assert_not_equal(self.nvme_compare(self.compare_file), 0)
> +        assert_equal(self.nvme_compare(self.write_file), 0)
> diff --git a/tests/nvme_create_max_ns_test.py b/tests/nvme_create_max_ns_test.py
> new file mode 100644
> index 0000000..15e0770
> --- /dev/null
> +++ b/tests/nvme_create_max_ns_test.py
> @@ -0,0 +1,97 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +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.
> +              - flabs : 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 = 0x1400000
> +        self.ncap = 0x1400000
> +        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()
> diff --git a/tests/nvme_error_log_test.py b/tests/nvme_error_log_test.py
> new file mode 100644
> index 0000000..cedb24b
> --- /dev/null
> +++ b/tests/nvme_error_log_test.py
> @@ -0,0 +1,86 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Smart Log Verification Testcase:-
> +
> +    1. Execute error-log on controller.
> +    2. Execute error-log on each available namespace.
> +
> +"""
> +
> +from nose.tools import assert_equal
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeErrorLogCmd(TestNVMe):
> +
> +    """
> +    Represents Smart Log testcae.
> +
> +        - Attributes:
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeErrorLogCmd """
> +        TestNVMe.__init__(self)
> +        self.setup_log_dir(self.__class__.__name__)
> +
> +    def __del__(self):
> +        """
> +        Post Section for TestNVMeErrorLogCmd
> +
> +            - Call super class's destructor.
> +        """
> +        TestNVMe.__del__(self)
> +
> +    def get_error_log_ctrl(self):
> +        """ Wrapper for executing error-log on controller.
> +            - Args:
> +                - None:
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        return self.get_error_log("0xFFFFFFFF")
> +
> +    def get_error_log_ns(self, nsid):
> +        """ Wrapper for executing error-log on a namespace.
> +            - Args:
> +                - nsid: namespace id to be used in error-log command.
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        return self.get_error_log(nsid)
> +
> +    def get_error_log_all_ns(self):
> +        """ Wrapper for executing error-log on all the namespaces.
> +            - Args:
> +                - None:
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        ns_list = self.get_ns_list()
> +        for nsid in range(0, len(ns_list)):
> +            self.get_error_log_ns(ns_list[nsid])
> +        return 0
> +
> +    def test_get_error_log(self):
> +        """ Testcase main """
> +        assert_equal(self.get_error_log_ctrl(), 0)
> +        assert_equal(self.get_error_log_all_ns(), 0)
> diff --git a/tests/nvme_flush_test.py b/tests/nvme_flush_test.py
> new file mode 100644
> index 0000000..d080887
> --- /dev/null
> +++ b/tests/nvme_flush_test.py
> @@ -0,0 +1,61 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Flush Command Testcase:-
> +
> +    1. Execute nvme flush on controller.
> +
> +"""
> +
> +from nose.tools import assert_equal
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeFlushCmd(TestNVMe):
> +
> +    """
> +    Represents Flush Testcase. Inherits TestNVMe class.
> +
> +        - Attributes:
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeFlushCmd """
> +        TestNVMe.__init__(self)
> +        self.setup_log_dir(self.__class__.__name__)
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeFlushCmd """
> +        TestNVMe.__del__(self)
> +
> +    def nvme_flush(self):
> +        """ Wrapper for nvme flush command.
> +           - Args:
> +               - None
> +           - Returns:
> +               - None
> +        """
> +        flush_cmd = "nvme flush " + self.ctrl + " -n " + str(self.default_nsid)
> +        print flush_cmd
> +        return self.exec_cmd(flush_cmd)
> +
> +    def test_nvme_flush(self):
> +        """ Testcase main """
> +        assert_equal(self.nvme_flush(), 0)
> diff --git a/tests/nvme_format_test.py b/tests/nvme_format_test.py
> new file mode 100644
> index 0000000..e5da23f
> --- /dev/null
> +++ b/tests/nvme_format_test.py
> @@ -0,0 +1,145 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +Namespace Format testcase :-
> +
> +    1. Create, attach, detach, delete primary namespace and
> +       extract the supported format information from default namespace:-
> +           - List of the supported format.
> +           - List of Metadata Size per format. Based on this we calculate
> +             data protection parameter at the time of namespace.
> +           - List of LBA Data Size per format.
> +    2. Use the collected information and iterate through each supported
> +       format:-
> +           - Create namespace.
> +           - Attach namespace.
> +           - Run IOs on the namespace under test.
> +           - Detach namespace
> +           - Delete Namespace.
> +"""
> +
> +import time
> +import subprocess
> +from nose.tools import assert_equal
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeFormatCmd(TestNVMe):
> +
> +    """
> +    Represents Format testcase.
> +
> +        - Attributes:
> +              - dps : data protection information.
> +              - flabs : LBA format information.
> +              - nsze : namespace size.
> +              - ncap : namespace capacity.
> +              - ctrl_id : controller id.
> +              - lba_format_list : lis of supported format.
> +              - ms_list : list of metadat size per format.
> +              - lbads_list : list of LBA data size per format.
> +              - test_log_dir : directory for logs, temp files.
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeFormatCmd """
> +        TestNVMe.__init__(self)
> +        self.dps = 0                 # ns data protection settings
> +        self.flbas = 0               # ns formattes logical block settings
> +        self.nsze = 0x1400000        # ns size
> +        self.ncap = 0x1400000        # ns capacity
> +        self.ctrl_id = self.get_ctrl_id()
> +        self.lba_format_list = []
> +        self.ms_list = []
> +        self.lbads_list = []
> +        self.test_log_dir = self.log_dir + "/" + self.__class__.__name__
> +        self.setup_log_dir(self.__class__.__name__)
> +        self.delete_all_ns()
> +        time.sleep(1)
> +
> +    def __del__(self):
> +        """
> +        Post Section for TestNVMeFormatCmd
> +
> +            - 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 attach_detach_primary_ns(self):
> +        """ Extract supported format information using default namespace """
> +        assert_equal(self.create_and_validate_ns(self.default_nsid,
> +                                                 self.nsze,
> +                                                 self.ncap,
> +                                                 self.flbas,
> +                                                 self.dps), 0)
> +        assert_equal(self.attach_ns(self.ctrl_id, self.default_nsid), 0)
> +        # read lbaf information
> +        id_ns = "nvme id-ns " + self.ctrl + \
> +                " -n1 | grep ^lbaf | awk '{print $2}' | tr -s \"\\n\" \" \""
> +        proc = subprocess.Popen(id_ns, shell=True, stdout=subprocess.PIPE)
> +        self.lba_format_list = proc.stdout.read().strip().split(" ")
> +        if proc.wait() == 0:
> +            # read lbads information
> +            id_ns = "nvme id-ns " + self.ctrl + \
> +                    " -n1 | grep ^lbaf | awk '{print $5}'" + \
> +                    " | cut -f 2 -d ':' | tr -s \"\\n\" \" \""
> +            proc = subprocess.Popen(id_ns, shell=True, stdout=subprocess.PIPE)
> +            self.lbads_list = proc.stdout.read().strip().split(" ")
> +            # read metadata information
> +            id_ns = "nvme id-ns " + self.ctrl + \
> +                    " -n1 | grep ^lbaf | awk '{print $4}'" + \
> +                    " | cut -f 2 -d ':' | tr -s \"\\n\" \" \""
> +            proc = subprocess.Popen(id_ns, shell=True, stdout=subprocess.PIPE)
> +            self.ms_list = proc.stdout.read().strip().split(" ")
> +            assert_equal(self.detach_ns(self.ctrl_id, self.default_nsid), 0)
> +            assert_equal(self.delete_and_validate_ns(self.default_nsid), 0)
> +            self.nvme_reset_ctrl()
> +
> +    def test_format_ns(self):
> +        """ Testcase main """
> +        # extract the supported format information.
> +        self.attach_detach_primary_ns()
> +
> +        # iterate through all supported format
> +        for i in range(0, len(self.lba_format_list)):
> +            print "\nlba format " + str(self.lba_format_list[i]) + \
> +                  " lbad       " + str(self.lbads_list[i]) + \
> +                  " ms         " + str(self.ms_list[i])
> +            metadata_size = 1 if self.ms_list[i] == '8' else 0
> +            err = self.create_and_validate_ns(self.default_nsid,
> +                                              self.nsze,
> +                                              self.ncap,
> +                                              self.lba_format_list[i],
> +                                              metadata_size)
> +            assert_equal(err, 0)
> +            assert_equal(self.attach_ns(self.ctrl_id, self.default_nsid), 0)
> +            self.run_ns_io(self.default_nsid, self.lbads_list[i])
> +            time.sleep(5)
> +            assert_equal(self.detach_ns(self.ctrl_id, self.default_nsid), 0)
> +            assert_equal(self.delete_and_validate_ns(self.default_nsid), 0)
> +            self.nvme_reset_ctrl()
> diff --git a/tests/nvme_get_features_test.py b/tests/nvme_get_features_test.py
> new file mode 100644
> index 0000000..7511de9
> --- /dev/null
> +++ b/tests/nvme_get_features_test.py
> @@ -0,0 +1,103 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +Get Features Testcase:-
> +
> +Test the Mandetory features with get features command:-
> +    1. 01h rbitration.
> +    2. 02h M Power Management.
> +    3. 04h M Temperature Threshold.
> +    4. 05h M Error Recovery.
> +    5. 07h M Number of Queues.
> +    6. 08h M Interrupt Coalescing.
> +    7. 09h M Interrupt Vector Configuration.
> +    8. 0Ah M Write Atomicity Normal.
> +    9. 0Bh M Asynchronous Event Configuration.
> +"""
> +
> +import subprocess
> +from nose.tools import assert_equal
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeGetMandetoryFeatures(TestNVMe):
> +
> +    """
> +    Represents Get Features testcase.
> +
> +        - Attributes:
> +              - feature_id_list : list of the mandetory features.
> +              - get_vector_list_cmd : vector list collection for 09h.
> +              - vector_list : vector list to hold the interrupt vectors.
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeGetMandetoryFeatures """
> +        TestNVMe.__init__(self)
> +        self.setup_log_dir(self.__class__.__name__)
> +        self.feature_id_list = ["0x01", "0x02", "0x04", "0x05", "0x07",
> +                                "0x08", "0x09", "0x0A", "0x0B"]
> +        get_vector_list_cmd = "cat /proc/interrupts | grep nvme |" \
> +                              " cut -d : -f 1 | tr -d ' ' | tr '\n' ' '"
> +        proc = subprocess.Popen(get_vector_list_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        self.vector_list = []
> +        self.vector_list = proc.stdout.read().strip().split(" ")
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeGetMandetoryFeatures
> +
> +            Call super class's destructor.
> +        """
> +        TestNVMe.__del__(self)
> +
> +    def get_mandetory_features(self, feature_id):
> +        """ Wrapper for NVMe get features command
> +            - Args:
> +                - feature_id : feature id to be used with get feature command.
> +            - Returns:
> +                - None
> +        """
> +        if str(feature_id) == "0x09":
> +            for vector in self.vector_list:
> +                get_feat_cmd = "nvme get-feature " + self.ctrl + \
> +                               " --feature-id=" + str(feature_id) + \
> +                               " --cdw11=" + str(vector)
> +                proc = subprocess.Popen(get_feat_cmd,
> +                                        shell=True,
> +                                        stdout=subprocess.PIPE)
> +                feature_output = proc.communicate()[0]
> +                print feature_output
> +                assert_equal(proc.wait(), 0)
> +        else:
> +            get_feat_cmd = "nvme get-feature " + self.ctrl + \
> +                           " --feature-id=" + str(feature_id)
> +            proc = subprocess.Popen(get_feat_cmd,
> +                                    shell=True,
> +                                    stdout=subprocess.PIPE)
> +            feature_output = proc.communicate()[0]
> +            print feature_output
> +            assert_equal(proc.wait(), 0)
> +
> +    def test_get_mandetory_features(self):
> +        """ Testcase main """
> +        for feature_id in self.feature_id_list:
> +            self.get_mandetory_features(feature_id)
> diff --git a/tests/nvme_read_write_test.py b/tests/nvme_read_write_test.py
> new file mode 100644
> index 0000000..a5f4579
> --- /dev/null
> +++ b/tests/nvme_read_write_test.py
> @@ -0,0 +1,72 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Read/Write Testcae:-
> +
> +    1. Create data file with specific pattern outside of the device under test.
> +    2. Write data file on the namespace under test.
> +    3. Read the data from the namespace under test into different file.
> +    4. Compare file in #1 and #3.
> +"""
> +
> +import filecmp
> +from nose.tools import assert_equal
> +from nvme_test_io import TestNVMeIO
> +
> +
> +class TestNVMeReadWriteTest(TestNVMeIO):
> +
> +    """
> +    Represents NVMe read, write testcase.
> +
> +        - Attributes:
> +              - start_block : starting block of to perform IO.
> +              - compare_file : data file to use in nvme comapre commmand.
> +              - test_log_dir : directory for logs, temp files.
> +    """
> +    def __init__(self):
> +        """ Pre Section for TestNVMeReadWriteTest """
> +        TestNVMeIO.__init__(self)
> +        self.start_block = 1023
> +        self.test_log_dir = self.log_dir + "/" + self.__class__.__name__
> +        self.setup_log_dir(self.__class__.__name__)
> +        self.write_file = self.test_log_dir + "/" + self.write_file
> +        self.read_file = self.test_log_dir + "/" + self.read_file
> +        self.create_data_file(self.write_file, self.data_size, "15")
> +        open(self.read_file, 'a').close()
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeReadWriteTest """
> +        TestNVMeIO.__del__(self)
> +
> +    def read_validate(self):
> +        """ Validate the data file read
> +            - Args:
> +                - None
> +            - Returns:
> +                - returns 0 on success, 1 on failure.
> +        """
> +        return 0 if filecmp.cmp(self.read_file, self.write_file) else 1
> +
> +    def test_nvme_write(self):
> +        """ Testcaes main  """
> +        assert_equal(self.nvme_write(), 0)
> +        assert_equal(self.nvme_read(), 0)
> +        assert_equal(self.read_validate(), 0)
> diff --git a/tests/nvme_simple_template_test.py b/tests/nvme_simple_template_test.py
> new file mode 100644
> index 0000000..b6736da
> --- /dev/null
> +++ b/tests/nvme_simple_template_test.py
> @@ -0,0 +1,55 @@
> +# 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 <[e-mail]>
> +#
> +""" Simple Template test example :-
> +"""
> +
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeSimpleTestTemplate(TestNVMe):
> +
> +    """ Represents Simple NVMe test """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeSimpleTestTemplate. """
> +        TestNVMe.__init__(self)
> +        self.setup_log_dir(self.__class__.__name__)
> +        # Add this test specific variables here
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeSimpleTestTemplate
> +
> +            Call super class's destructor.
> +        """
> +        # Add this test specific cleanup code here
> +        TestNVMe.__del__(self)
> +
> +    def simple_template_test(self):
> +        """ Wrapper for this test specific functions
> +            - Args:
> +                - None
> +            - Returns:
> +                - None
> +        """
> +        pass
> +
> +    def test_get_mandetory_features(self):
> +        """ Testcase main """
> +        self.simple_template_test()
> diff --git a/tests/nvme_smart_log_test.py b/tests/nvme_smart_log_test.py
> new file mode 100644
> index 0000000..e1eb6e5
> --- /dev/null
> +++ b/tests/nvme_smart_log_test.py
> @@ -0,0 +1,86 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Smart Log Verification Testcase:-
> +
> +    1. Execute smat-log on controller.
> +    2. Execute smart-log on each available namespace.
> +
> +"""
> +
> +from nose.tools import assert_equal
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeSmartLogCmd(TestNVMe):
> +
> +    """
> +    Represents Smart Log testcae.
> +
> +        - Attributes:
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeSmartLogCmd """
> +        TestNVMe.__init__(self)
> +        self.setup_log_dir(self.__class__.__name__)
> +
> +    def __del__(self):
> +        """
> +        Post Section for TestNVMeSmartLogCmd
> +
> +            - Call super class's destructor.
> +        """
> +        TestNVMe.__del__(self)
> +
> +    def get_smart_log_ctrl(self):
> +        """ Wrapper for executing smart-log on controller.
> +            - Args:
> +                - None:
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        return self.get_smart_log("0xFFFFFFFF")
> +
> +    def get_smart_log_ns(self, nsid):
> +        """ Wrapper for executing smart-log on a namespace.
> +            - Args:
> +                - nsid: namespace id to be used in smart-log command.
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        return self.get_smart_log(nsid)
> +
> +    def get_smart_log_all_ns(self):
> +        """ Wrapper for executing smart-log on all the namespaces.
> +            - Args:
> +                - None:
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        ns_list = self.get_ns_list()
> +        for nsid in range(0, len(ns_list)):
> +            self.get_smart_log_ns(ns_list[nsid])
> +        return 0
> +
> +    def test_smart_log(self):
> +        """ Testcase main """
> +        assert_equal(self.get_smart_log_ctrl(), 0)
> +        assert_equal(self.get_smart_log_all_ns(), 0)
> diff --git a/tests/nvme_test.py b/tests/nvme_test.py
> new file mode 100644
> index 0000000..c3ee16e
> --- /dev/null
> +++ b/tests/nvme_test.py
> @@ -0,0 +1,395 @@
> +# 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 <[e-mail]>
> +#
> +""" Base class for all the testcases
> +"""
> +
> +import re
> +import os
> +import sys
> +import json
> +import mmap
> +import stat
> +import time
> +import shutil
> +import string
> +import subprocess
> +from nose import tools
> +from nose.tools import assert_equal
> +from nvme_test_logger import TestNVMeLogger
> +
> +
> +class TestNVMe(object):
> +
> +    """
> +    Represents a testcase, each testcase shuold inherit this
> +    class or appropriate subclass which is a child of this class.
> +
> +    Common utility functions used in various testcases.
> +
> +        - Attributes:
> +            - ctrl : NVMe Controller.
> +            - ns1 : default namespace.
> +            - default_nsid : default namespace id.
> +            - config_file : configuration file.
> +            - clear_log_dir : default log directory.
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMe. """
> +        # common code used in various testcases.
> +        self.ctrl = "XXX"
> +        self.ns1 = "XXX"
> +        self.test_log_dir = "XXX"
> +        self.default_nsid = 0x1
> +        self.config_file = 'config.json'
> +
> +        self.load_config()
> +        self.validate_pci_device()
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMe. """
> +        if self.clear_log_dir is True:
> +            shutil.rmtree(self.log_dir, ignore_errors=True)
> +
> +    @tools.nottest
> +    def validate_pci_device(self):
> +        """ Validate underlaying device belogs to pci subsystem.
> +            - Args:
> +                - None
> +            - Returns:
> +                - None
> +        """
> +        cmd = cmd = "find /sys/devices -name \\*nvme0 | grep -i pci"
> +        err = subprocess.call(cmd, shell=True)
> +        assert_equal(err, 0, "ERROR : Only NVMe PCI subsystem is supported")
> +
> +    @tools.nottest
> +    def load_config(self):
> +        """ Load Basic test configuration.
> +            - Args:
> +                - None
> +            - Returns:
> +                - None
> +        """
> +        with open(self.config_file) as data_file:
> +            config = json.load(data_file)
> +            self.ctrl = config['controller']
> +            self.ns1 = config['ns1']
> +            self.log_dir = config['log_dir']
> +            self.clear_log_dir = False
> +
> +            if self.clear_log_dir is True:
> +                shutil.rmtree(self.log_dir, ignore_errors=True)
> +
> +            if not os.path.exists(self.log_dir):
> +                os.makedirs(self.log_dir)
> +
> +    @tools.nottest
> +    def setup_log_dir(self, test_name):
> +        """ Set up the log directory for a testcase
> +            Args:
> +              - test_name : name of the testcase.
> +            Returns:
> +              - None
> +        """
> +        self.test_log_dir = self.log_dir + "/" + test_name
> +        if not os.path.exists(self.test_log_dir):
> +            os.makedirs(self.test_log_dir)
> +        sys.stdout = TestNVMeLogger(self.test_log_dir + "/" + "stdout.log")
> +        sys.stderr = TestNVMeLogger(self.test_log_dir + "/" + "stderr.log")
> +
> +    @tools.nottest
> +    def exec_cmd(self, cmd):
> +        """ Wrapper for executing a shell command and return the result. """
> +        proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
> +        return proc.wait()
> +
> +    @tools.nottest
> +    def nvme_reset_ctrl(self):
> +        """ Wrapper for nvme reset command.
> +            - Args:
> +                - None:
> +            - Returns:
> +                - None
> +        """
> +        nvme_reset_cmd = "nvme reset " + self.ctrl
> +        err = subprocess.call(nvme_reset_cmd,
> +                              shell=True,
> +                              stdout=subprocess.PIPE)
> +        assert_equal(err, 0, "ERROR : nvme reset failed")
> +        time.sleep(5)
> +        rescan_cmd = "echo 1 > /sys/bus/pci/rescan"
> +        proc = subprocess.Popen(rescan_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE,
> +                                stderr=subprocess.PIPE)
> +        time.sleep(5)
> +        assert_equal(proc.wait(), 0, "ERROR : pci rescan failed")
> +
> +    @tools.nottest
> +    def get_ctrl_id(self):
> +        """ Wrapper for extracting the controller id.
> +            - Args:
> +                - None
> +            - Returns:
> +                - controller id.
> +        """
> +        get_ctrl_id = "nvme list-ctrl " + self.ctrl
> +        proc = subprocess.Popen(get_ctrl_id,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        err = proc.wait()
> +        assert_equal(err, 0, "ERROR : nvme list-ctrl failed")
> +        line = proc.stdout.readline()
> +        ctrl_id = line.split(":")[1].strip()
> +        return ctrl_id
> +
> +    @tools.nottest
> +    def get_ns_list(self):
> +        """ Wrapper for extrating the namespace list.
> +            - Args:
> +                - None
> +            - Returns:
> +                - List of the namespaces.
> +        """
> +        ns_list = []
> +        ns_list_cmd = "nvme list-ns " + self.ctrl
> +        proc = subprocess.Popen(ns_list_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        assert_equal(proc.wait(), 0, "ERROR : nvme list namespace failed")
> +        for line in proc.stdout:
> +            ns_list.append(string.replace(line.split(":")[1], '\n', ''))
> +
> +        return ns_list
> +
> +    @tools.nottest
> +    def get_max_ns(self):
> +        """ Wrapper for extracting maximum number of namspaces supported.
> +            - Args:
> +                - None
> +            - Returns:
> +                - maximum number of namespaces supported.
> +        """
> +        pattern = re.compile("^nn[ ]+: [0-9]", re.IGNORECASE)
> +        max_ns = -1
> +        max_ns_cmd = "nvme id-ctrl " + self.ctrl
> +        proc = subprocess.Popen(max_ns_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        err = proc.wait()
> +        assert_equal(err, 0, "ERROR : reading maximum namespace count failed")
> +
> +        for line in proc.stdout:
> +            if pattern.match(line):
> +                max_ns = line.split(":")[1].strip()
> +                break
> +        print max_ns
> +        return int(max_ns)
> +
> +    @tools.nottest
> +    def delete_all_ns(self):
> +        """ Wrapper for deleting all the namespaces.
> +            - Args:
> +                - None
> +            - Returns:
> +                - None
> +        """
> +        delete_ns_cmd = "nvme delete-ns " + self.ctrl + " -n 0xFFFFFFFF"
> +        assert_equal(self.exec_cmd(delete_ns_cmd), 0)
> +        list_ns_cmd = "nvme list-ns " + self.ctrl + " --all | wc -l"
> +        proc = subprocess.Popen(list_ns_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        output = proc.stdout.read().strip()
> +        assert_equal(output, '0', "ERROR : deleting all namespace failed")
> +
> +    @tools.nottest
> +    def create_ns(self, nsze, ncap, flbas, dps):
> +        """ Wrapper for creating a namespace.
> +            - Args:
> +                - nsze : new namespace size.
> +                - ncap : new namespace capacity.
> +                - flbas : new namespace format.
> +                - dps : new namespace data protection information.
> +            - Returns:
> +                - return code of the nvme create namespace command.
> +        """
> +        create_ns_cmd = "nvme create-ns " + self.ctrl + " --nsze=" + \
> +                        str(nsze) + " --ncap=" + str(ncap) + \
> +                        " --flbas=" + str(flbas) + " --dps=" + str(dps)
> +        return self.exec_cmd(create_ns_cmd)
> +
> +    @tools.nottest
> +    def create_and_validate_ns(self, nsid, nsze, ncap, flbas, dps):
> +        """ Wrapper for creating and validating a namespace.
> +            - Args:
> +                - nsid : new namespace id.
> +                - nsze : new namespace size.
> +                - ncap : new namespace capacity.
> +                - flbas : new namespace format.
> +                - dps : new namespace data protection information.
> +            - Returns:
> +                - return 0 on success, error code on failure.
> +        """
> +        err = self.create_ns(nsze, ncap, flbas, dps)
> +        if err == 0:
> +            time.sleep(2)
> +            id_ns_cmd = "nvme id-ns " + self.ctrl + " -n " + str(nsid)
> +            err = subprocess.call(id_ns_cmd,
> +                                  shell=True,
> +                                  stdout=subprocess.PIPE)
> +        return err
> +
> +    @tools.nottest
> +    def attach_ns(self, ctrl_id, ns_id):
> +        """ Wrapper for attaching the namespace.
> +            - Args:
> +                - ctrl_id : controller id to which namespace to be attched.
> +                - nsid : new namespace id.
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        attach_ns_cmd = "nvme attach-ns " + self.ctrl + \
> +                        " --namespace-id=" + str(ns_id) + \
> +                        " --controllers=" + ctrl_id
> +        err = subprocess.call(attach_ns_cmd,
> +                              shell=True,
> +                              stdout=subprocess.PIPE)
> +        time.sleep(5)
> +        if err == 0:
> +            # enumerate new namespace block device
> +            self.nvme_reset_ctrl()
> +            time.sleep(5)
> +            # check if new namespace block device exists
> +            err = 0 if stat.S_ISBLK(os.stat(self.ns1).st_mode) else 1
> +        return err
> +
> +    @tools.nottest
> +    def detach_ns(self, ctrl_id, nsid):
> +        """ Wrapper for detaching the namespace.
> +            - Args:
> +                - ctrl_id : controller id to which namespace to be attched.
> +                - nsid : new namespace id.
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        detach_ns_cmd = "nvme detach-ns " + self.ctrl + \
> +                        " --namespace-id=" + str(nsid) + \
> +                        " --controllers=" + ctrl_id
> +        return subprocess.call(detach_ns_cmd,
> +                               shell=True,
> +                               stdout=subprocess.PIPE)
> +
> +    @tools.nottest
> +    def delete_and_validate_ns(self, nsid):
> +        """ Wrapper for deleting and validating that namespace is deleted.
> +            - Args:
> +                - nsid : new namespace id.
> +            - Returns:
> +                - 0 on success, 1 on failure.
> +        """
> +        # delete the namespace
> +        delete_ns_cmd = "nvme delete-ns " + self.ctrl + " -n " + str(nsid)
> +        err = subprocess.call(delete_ns_cmd,
> +                              shell=True,
> +                              stdout=subprocess.PIPE)
> +        assert_equal(err, 0, "ERROR : delete namespace failed")
> +        return err
> +
> +    def get_smart_log(self, nsid):
> +        """ Wrapper for nvme smart-log command.
> +            - Args:
> +                - nsid : namespace id to get smart log from.
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        smart_log_cmd = "nvme smart-log " + self.ctrl + " -n " + str(nsid)
> +        print smart_log_cmd
> +        proc = subprocess.Popen(smart_log_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        err = proc.wait()
> +        assert_equal(err, 0, "ERROR : nvme smart log failed")
> +
> +        for line in proc.stdout:
> +            if "data_units_read" in line:
> +                data_units_read = \
> +                    string.replace(line.split(":")[1].strip(), ",", "")
> +            if "data_units_written" in line:
> +                data_units_written = \
> +                    string.replace(line.split(":")[1].strip(), ",", "")
> +            if "host_read_commands" in line:
> +                host_read_commands = \
> +                    string.replace(line.split(":")[1].strip(), ",", "")
> +            if "host_write_commands" in line:
> +                host_write_commands = \
> +                    string.replace(line.split(":")[1].strip(), ",", "")
> +
> +        print "data_units_read " + data_units_read
> +        print "data_units_written " + data_units_written
> +        print "host_read_commands " + host_read_commands
> +        print "host_write_commands " + host_write_commands
> +        return err
> +
> +    def get_error_log(self, nsid):
> +        """ Wrapper for nvme error-log command.
> +            - Args:
> +                - nsid : namespace id to get error log from.
> +            - Returns:
> +                - 0 on success, error code on failure.
> +        """
> +        pattern = re.compile("^ Entry\[[ ]*[0-9]+\]")
> +        error_log_cmd = "nvme error-log " + self.ctrl + " -n " + str(nsid)
> +        proc = subprocess.Popen(error_log_cmd,
> +                                shell=True,
> +                                stdout=subprocess.PIPE)
> +        err = proc.wait()
> +        assert_equal(err, 0, "ERROR : nvme error log failed")
> +        line = proc.stdout.readline()
> +        err_log_entry_count = int(line.split(" ")[5].strip().split(":")[1])
> +        entry_count = 0
> +        for line in proc.stdout:
> +            if pattern.match(line):
> +                entry_count += 1
> +
> +        return 0 if err_log_entry_count == entry_count else 1
> +
> +    def run_ns_io(self, nsid, lbads):
> +        """ Wrapper to run ios on namespace under test.
> +            - Args:
> +                - lbads : LBA Data size supported in power of 2 format.
> +            - Returns:
> +                - None
> +        """
> +        block_size = mmap.PAGESIZE if lbads < 9 else 2 ** int(lbads)
> +        ns_path = self.ctrl + "n" + str(nsid)
> +        io_cmd = "dd if=" + ns_path + " of=/dev/null" + " bs=" + \
> +                 str(block_size) + " count=10 > /dev/null 2>&1"
> +        print io_cmd
> +        run_io = subprocess.Popen(io_cmd, shell=True, stdout=subprocess.PIPE)
> +        run_io_result = run_io.communicate()[1]
> +        assert_equal(run_io_result, None)
> +        io_cmd = "dd if=/dev/zero of=" + ns_path + " bs=" + \
> +                 str(block_size) + " count=10 > /dev/null 2>&1"
> +        print io_cmd
> +        run_io = subprocess.Popen(io_cmd, shell=True, stdout=subprocess.PIPE)
> +        run_io_result = run_io.communicate()[1]
> +        assert_equal(run_io_result, None)
> diff --git a/tests/nvme_test_io.py b/tests/nvme_test_io.py
> new file mode 100644
> index 0000000..e2a6b46
> --- /dev/null
> +++ b/tests/nvme_test_io.py
> @@ -0,0 +1,99 @@
> +# 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 <[e-mail]>
> +#
> +""" Inherit TestNVMeIO for nvme read/write operations """
> +
> +import os
> +from nose import tools
> +from nvme_test import TestNVMe
> +
> +
> +class TestNVMeIO(TestNVMe):
> +
> +    """
> +    Variable and Methods required to perform nvme read/write.
> +
> +        - Attributes:
> +              - data_size : data size to perform IO.
> +              - start_block : starting block of to perform IO.
> +              - block_count : Number of blocks to use in IO.
> +              - write_file : data file to use in nvme write command.
> +              - read_file : data file to use in nvme read command.
> +    """
> +
> +    def __init__(self):
> +        """ Pre Section for TestNVMeIO """
> +        TestNVMe.__init__(self)
> +        # common code used in various testcases.
> +        self.data_size = 512
> +        self.start_block = 0
> +        self.block_count = 0
> +        self.write_file = "write_file.txt"
> +        self.read_file = "read_file.txt"
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeIO """
> +        TestNVMe.__del__(self)
> +
> +    @tools.nottest
> +    def create_data_file(self, pathname, data_size, pattern):
> +        """ Creates data file with specific pattern
> +            - Args:
> +                - pathname : data file path name.
> +                - data_size : total size of the data.
> +                - pattern : data pattern to create file.
> +            - Returns:
> +            None
> +        """
> +        pattern_len = len(pattern)
> +        data_file = open(pathname, "w")
> +        for i in range(0, data_size):
> +            data_file.write(pattern[i % pattern_len])
> +        data_file.flush()
> +        os.fsync(data_file.fileno())
> +        data_file.close()
> +
> +    @tools.nottest
> +    def nvme_write(self):
> +        """ Wrapper for nvme write operation
> +            - Args:
> +                - None
> +            - Returns:
> +                - return code for nvme write command.
> +        """
> +        write_cmd = "nvme write " + self.ns1 + " --start-block=" + \
> +                    str(self.start_block) + " --block-count=" + \
> +                    str(self.block_count) + " --data-size=" + \
> +                    str(self.data_size) + " --data=" + self.write_file
> +        return self.exec_cmd(write_cmd)
> +
> +    @tools.nottest
> +    def nvme_read(self):
> +        """ Wrapper for nvme read operation
> +            - Args:
> +                - None
> +            - Returns:
> +                - return code for nvme read command.
> +        """
> +        read_cmd = "nvme read " + self.ns1 + " --start-block=" + \
> +                   str(self.start_block) + " --block-count=" + \
> +                   str(self.block_count) + " --data-size=" + \
> +                   str(self.data_size) + " --data=" + self.read_file
> +        print read_cmd
> +        return self.exec_cmd(read_cmd)
> diff --git a/tests/nvme_test_logger.py b/tests/nvme_test_logger.py
> new file mode 100644
> index 0000000..c59fa18
> --- /dev/null
> +++ b/tests/nvme_test_logger.py
> @@ -0,0 +1,52 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +Logger for NVMe Test Framwwork:-
> +
> +"""
> +import sys
> +
> +
> +class TestNVMeLogger(object):
> +    """ Represents Logger for NVMe Testframework.  """
> +    def __init__(self, log_file_path):
> +        """ Logger setup
> +            - Args:
> +                log_file_path : path to store the log.
> +        """
> +        self.terminal = sys.stdout
> +        self.log = open(log_file_path, "w")
> +
> +    def write(self, log_message):
> +        """ Logger setup
> +            - Args:
> +                log_message: string to write in the log file.
> +            - Returns:
> +                None
> +        """
> +        self.terminal.write(log_message)
> +        self.log.write(log_message)
> +
> +    def flush(self):
> +        """ This flush method is needed for python 3 compatibility.
> +            this handles the flush command by doing nothing.
> +            you might want to specify some extra behavior here.
> +        """
> +        pass
> diff --git a/tests/nvme_writeuncor_test.py b/tests/nvme_writeuncor_test.py
> new file mode 100644
> index 0000000..9f96f63
> --- /dev/null
> +++ b/tests/nvme_writeuncor_test.py
> @@ -0,0 +1,76 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Write Compare Testcae:-
> +
> +    1. Read block of data successfully.
> +    2. Issue write uncorrectable to block of data.
> +    3. Attempt to read from same block; shall fail.
> +    4. Issue a write command to first block of data.
> +    5. Read from the same block; shall pass.
> +
> +"""
> +
> +from nose.tools import assert_equal, assert_not_equal
> +from nvme_test_io import TestNVMeIO
> +
> +
> +class TestNVMeUncor(TestNVMeIO):
> +
> +    """
> +    Represents NVMe Write Uncorrecatble testcase.
> +        - Attributes:
> +              - start_block : starting block of to perform IO.
> +              - test_log_dir : directory for logs, temp files.
> +    """
> +
> +    def __init__(self):
> +        """ Constructor TestNVMeUncor """
> +        TestNVMeIO.__init__(self)
> +        self.start_block = 1023
> +        self.setup_log_dir(self.__class__.__name__)
> +        self.write_file = self.test_log_dir + "/" + self.write_file
> +        self.read_file = self.test_log_dir + "/" + self.read_file
> +        self.create_data_file(self.write_file, self.data_size, "15")
> +        open(self.read_file, 'a').close()
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeUncor """
> +        TestNVMeIO.__del__(self)
> +
> +    def write_uncor(self):
> +        """ Wrapper for nvme write uncorrectable
> +            - Args:
> +                - None
> +            - Returns:
> +                - return code of nvme write uncorrectable command.
> +        """
> +        write_uncor_cmd = "nvme write-uncor " + self.ns1 + \
> +                          " --start-block=" + str(self.start_block) + \
> +                          " --block-count=" + str(self.block_count)
> +        return self.exec_cmd(write_uncor_cmd)
> +
> +    def test_write_uncor(self):
> +        """ Testcase main """
> +        assert_equal(self.nvme_read(), 0)
> +        assert_equal(self.write_uncor(), 0)
> +        assert_not_equal(self.nvme_read(), 0)
> +        assert_equal(self.nvme_write(), 0)
> +        assert_equal(self.nvme_read(), 0)
> diff --git a/tests/nvme_writezeros_test.py b/tests/nvme_writezeros_test.py
> new file mode 100644
> index 0000000..157fd78
> --- /dev/null
> +++ b/tests/nvme_writezeros_test.py
> @@ -0,0 +1,102 @@
> +# 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 <[e-mail]>
> +#
> +"""
> +NVMe Write Zeros:-
> +
> +    1. Issue a write command to block of data.
> +    2. Read from same block to verify data pattern.
> +    3. Issue write zeros to the block of data.
> +    4. Read from same block, should be all zeroes.
> +
> +"""
> +
> +import filecmp
> +from nose.tools import assert_equal
> +from nvme_test_io import TestNVMeIO
> +
> +
> +class TestNVMeWriteZeros(TestNVMeIO):
> +
> +    """
> +    Represents NVMe Write Zero Testcase.
> +
> +        - Attributes:
> +              - zero_file : file with all '\0' to compare the zero data.
> +              - data_size : data size to perform IO.
> +              - start_block : starting block of to perform IO.
> +              - block_count: Number of blocks to use in IO.
> +              - test_log_dir : directory for logs, temp files.
> +    """
> +    def __init__(self):
> +        """ Pre Section for TestNVMeWriteZeros """
> +        TestNVMeIO.__init__(self)
> +        self.start_block = 1023
> +        self.block_count = 0
> +        self.setup_log_dir(self.__class__.__name__)
> +        self.write_file = self.test_log_dir + "/" + self.write_file
> +        self.read_file = self.test_log_dir + "/" + self.read_file
> +        self.zero_file = self.test_log_dir + "/" + "zero_file.txt"
> +        self.create_data_file(self.write_file, self.data_size, "15")
> +        self.create_data_file(self.zero_file, self.data_size, '\0')
> +        open(self.read_file, 'a').close()
> +
> +    def __del__(self):
> +        """ Post Section for TestNVMeWriteZeros """
> +        TestNVMeIO.__del__(self)
> +
> +    def write_zeroes(self):
> +        """ Wrapper for nvme write-zeroe
> +            - Args:
> +                - None
> +            - Returns:
> +                - return code for nvme write command.
> +        """
> +        write_zeroes_cmd = "nvme write-zeroes " + self.ns1 + \
> +                           " --start-block=" + str(self.start_block) + \
> +                           " --block-count=" + str(self.block_count)
> +        return self.exec_cmd(write_zeroes_cmd)
> +
> +    def validate_write_read(self):
> +        """ Validate the file which had been read from the device
> +            - Args:
> +                - None
> +            - Returns:
> +                - 0 on success, 1 on failure
> +        """
> +        return 0 if filecmp.cmp(self.write_file, self.read_file) is True else 1
> +
> +    def validate_zeroes(self):
> +        """
> +        Validate the data which is zeroed out via write-zeroes
> +            - Args:
> +                - None
> +            - Returns:
> +                - 0 on success, 1 on failure
> +         """
> +        return 0 if filecmp.cmp(self.zero_file, self.read_file) is True else 1
> +
> +    def test_write_zeros(self):
> +        """ Testcae main """
> +        assert_equal(self.nvme_write(), 0)
> +        assert_equal(self.nvme_read(), 0)
> +        assert_equal(self.validate_write_read(), 0)
> +        assert_equal(self.write_zeroes(), 0)
> +        assert_equal(self.nvme_read(), 0)
> +        assert_equal(self.validate_zeroes(), 0)
> --
> 1.9.1
>
--
To unsubscribe from this list: send the line "unsubscribe linux-block" in
the body of a message to [e-mail]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch

diff --git a/Makefile b/Makefile
index 117cbbe..33c7190 100644
--- a/Makefile
+++ b/Makefile
@@ -46,6 +46,9 @@  nvme.o: nvme.c nvme.h nvme-print.h nvme-ioctl.h argconfig.h suffix.h nvme-lightn
 doc: $(NVME)
 	$(MAKE) -C Documentation
 
+test:
+	$(MAKE) -C tests/ run
+
 all: doc
 
 clean:
@@ -136,4 +139,4 @@  rpm: dist
 	$(RPMBUILD) -ta nvme-$(NVME_VERSION).tar.gz
 
 .PHONY: default doc all clean clobber install-man install-bin install
-.PHONY: dist pkg dist-orig deb deb-light rpm FORCE
+.PHONY: dist pkg dist-orig deb deb-light rpm FORCE test
diff --git a/tests/Makefile b/tests/Makefile
new file mode 100644
index 0000000..c0f9f31
--- /dev/null
+++ b/tests/Makefile
@@ -0,0 +1,48 @@ 
+###############################################################################
+#
+#    Makefile : Allows user to run testcases, generate documentation, and
+#               perform static code analysis.
+#
+###############################################################################
+
+NOSE2_OPTIONS="--verbose"
+
+help: all
+
+all:
+	@echo "Usage:"
+	@echo
+	@echo "  make run         - Run all testcases."
+	@echo "  make doc         - Generate Documentation."
+	@echo "  make cleanall    - removes *pyc, documentation."
+	@echo "  make static_check- runs pep8, flake8, pylint on code."
+
+doc:
+	@epydoc -v --output=Documentation *.py
+
+run:
+	@for i in `ls *.py`; \
+	do \
+		echo "Running $${i}"; \
+		TESTCASE_NAME=`echo $${i} | cut -f 1 -d '.'`; \
+		nose2 ${NOSE2_OPTIONS} $${TESTCASE_NAME}; \
+	done
+
+static_check:
+	@for i in `ls *.py`; \
+	do \
+		echo "Pylint :- " ; \
+		printf "%10s    " $${i}; \
+		pylint $${i} 2>&1  | grep "^Your code" |  awk '{print $$7}';\
+		echo "--------------------------------------------";\
+		pep8 $${i}; \
+		echo "pep8 :- "; \
+		echo "flake8 :- "; \
+		flake8 $${i}; \
+	done
+
+cleanall: clean
+	@rm -fr *.pyc Documentation
+
+clean:
+	@rm -fr *.pyc
diff --git a/tests/README b/tests/README
new file mode 100644
index 0000000..70686d8
--- /dev/null
+++ b/tests/README
@@ -0,0 +1,84 @@ 
+nvmetests
+=========
+
+    This contains NVMe unit tests framework. The purpose of this framework
+    to use nvme cli and test various supported commands and scenarios for
+    NVMe device.
+
+    In current implementation this framework uses nvme cli to
+    interact with underlying controller/namespace.
+
+1. Common Package Dependencies
+------------------------------
+
+    1. Python(>= 2.7.5 or >= 3.3)
+    2. nose2(Installation guide http://nose2.readthedocs.io/)
+    3. nvme-cli(https://github.com/linux-nvme/nvme-cli.git)
+
+2. Overview
+-----------
+
+    This framework follows simple class hierarchy. Each test file contains
+    one test. Each test is direct subclass or indirect subclass of TestNVMe
+    class which represents one testcase. To write a new testcase one can copy
+    existing template "nvme_simple_template_test.py" and start adding new
+    testcase specific functionality. For detailed information please look into
+    section 3.
+
+    For more information about tests, class hierarchy and code please refer :-
+
+    1. Documentation :- html/
+    2. Class Index :-  html/index.html
+    3. Class Hierarchy :- html/class-tree.html
+
+    For each testcase it will create log directory mentioned in
+    configuration file. This directory will be used for a temporary files
+    and storing execution logs of each testcases. Current implementation stores
+    stdout and stderr for each testcase under log directory, e.g. :-
+
+        $ tree nvmetests/
+        nvmetests/
+        ├── TestNVMeAttachDetachNSCmd
+        │   ├── stderr.log
+        │   └── stdout.log
+        ├── TestNVMeFlushCmd
+        │   ├── stderr.log
+        │   └── stdout.log
+        └── TestNVMeFormatCmd
+            ├── stderr.log
+            └── stdout.log
+                 .
+                 .
+                 .
+
+3. Walk-Through Example for writing a new testcase
+--------------------------------------------------
+    1. Copy simple test template file from current directory
+       with appropriate name, replace "simple_template" with testcase name
+       in new file name. Update config.json if necessary.
+    2. Write a testcase main function, make sure its name is starting with
+       test_*.
+    3. Based on the requirement one can inherit TestNVMe or TestNVMeIO
+       class.
+    4. Write test precondition code into __init__. Make sure you are calling
+       super class __init__.
+    5. Write test post condition code into __del__. Make sure you are calling
+       super class __del__.
+    6. Before writing a new function have a look into TestNVMe to see if it
+       can be reused.
+    7. Once testcase is ready make sure :-
+           a. Run pep8, flake8, pylint on the testcase and fix errors/warnings.
+              -Example "$ make static_check" will run pep8, flake8 and pylint on
+              all the python files in current directory.
+           b. Execute make doc to generate the documentation.
+              -Example "$ make doc" will create and update existing
+              documentation.
+
+4. Running testcases with framework
+-----------------------------------
+    1. Running single testcase with nose2 :-
+       $ nose2 --verbose nvme_writezeros_test
+       $ nose2 --verbose nvme_read_write_test
+
+    2. Running all the testcases with Makefile :-
+       $ make run
diff --git a/tests/TODO b/tests/TODO
new file mode 100644
index 0000000..69806a9
--- /dev/null
+++ b/tests/TODO
@@ -0,0 +1,14 @@ 
+nvmetests TODO List
+===================
+
+Feature list (with priority):-
+------------------------------
+    1. PRE and POST section improvements :-
+        a. Add functionality to load and unload driver.
+        b. Make sure default namespace is present, if not create one before
+           any test begins. Read the default namespace size from config file.
+    2. Add system statistics collection in PRE and POST section of testcase.
+    3. Create execution summary file under log directory at the end of each
+       run.
+    4. Add tracing functionality to track overall and current progress of the
+       testcase.
diff --git a/tests/config.json b/tests/config.json
new file mode 100644
index 0000000..098fba8
--- /dev/null
+++ b/tests/config.json
@@ -0,0 +1,5 @@ 
+{
+	"controller" : "/dev/nvme0",
+        "ns1": "/dev/nvme0n1",
+	"log_dir": "nvmetests/"
+}
diff --git a/tests/nvme_attach_detach_ns_test.py b/tests/nvme_attach_detach_ns_test.py
new file mode 100644
index 0000000..92a82dd
--- /dev/null
+++ b/tests/nvme_attach_detach_ns_test.py
@@ -0,0 +1,90 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Namespace Management Testcase:-
+
+    1. Create Namespace and validate.
+    2. Attach Namespace to controller.
+    3. Run IOs on Namespace under test.
+    4. Detach Namespace from controller.
+    5. Delete Namespace.
+"""
+
+import time
+from nose.tools import assert_equal
+from nvme_test import TestNVMe
+
+
+class TestNVMeAttachDetachNSCmd(TestNVMe):
+
+    """
+    Represents Attach, Detach namespace testcase.
+
+        - Attributes:
+              - dps : data protection information.
+              - flabs : 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 = 0x1400000
+        self.ncap = 0x1400000
+        self.setup_log_dir(self.__class__.__name__)
+        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 """
+        err = self.create_and_validate_ns(self.default_nsid,
+                                          self.nsze,
+                                          self.ncap,
+                                          self.flbas,
+                                          self.dps)
+        assert_equal(err, 0)
+        assert_equal(self.attach_ns(self.ctrl_id, self.default_nsid), 0)
+
+        self.run_ns_io(self.default_nsid, 0)
+
+        assert_equal(self.detach_ns(self.ctrl_id, self.default_nsid), 0)
+        assert_equal(self.delete_and_validate_ns(self.default_nsid), 0)
+        self.nvme_reset_ctrl()
diff --git a/tests/nvme_compare_test.py b/tests/nvme_compare_test.py
new file mode 100644
index 0000000..34c140d
--- /dev/null
+++ b/tests/nvme_compare_test.py
@@ -0,0 +1,79 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Compare Command Testcase:-
+
+    1. Create a data file 1 with pattern 1515 to write.
+    2. Create a data file 2 with pattern 2525 to compare with.
+    3. Write a block of data pattern using data file1.
+    4. Compare written block to data file 2's pattern; shall fail.
+    5. Compare written block to data file1's pattern; shall pass.
+
+"""
+
+from nose.tools import assert_equal, assert_not_equal
+from nvme_test_io import TestNVMeIO
+
+
+class TestNVMeCompareCmd(TestNVMeIO):
+
+    """
+    Represents Compare Testcase. Inherits TestNVMeIO class.
+
+        - Attributes:
+              - data_size : data size to perform IO.
+              - start_block : starting block of to perform IO.
+              - compare_file : data file to use in nvme comapre commmand.
+              - test_log_dir : directory for logs, temp files.
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeCompareCmd """
+        TestNVMeIO.__init__(self)
+        self.data_size = 1024
+        self.start_block = 1023
+        self.setup_log_dir(self.__class__.__name__)
+        self.compare_file = self.test_log_dir + "/" + "compare_file.txt"
+        self.write_file = self.test_log_dir + "/" + self.write_file
+        self.create_data_file(self.write_file, self.data_size, "15")
+        self.create_data_file(self.compare_file, self.data_size, "25")
+
+    def __del__(self):
+        """ Post Section for TestNVMeCompareCmd """
+        TestNVMeIO.__del__(self)
+
+    def nvme_compare(self, cmp_file):
+        """ Wrapper for nvme compare command.
+           - Args:
+               - cmp_file : data file used in nvme compare command.
+           - Returns:
+               - return code of the nvme compare command.
+        """
+        compare_cmd = "nvme compare " + self.ns1 + " --start-block=" + \
+                      str(self.start_block) + " --block-count=" + \
+                      str(self.block_count) + " --data-size=" + \
+                      str(self.data_size) + " --data=" + cmp_file
+        return self.exec_cmd(compare_cmd)
+
+    def test_nvme_compare(self):
+        """ Testcase main """
+        assert_equal(self.nvme_write(), 0)
+        assert_not_equal(self.nvme_compare(self.compare_file), 0)
+        assert_equal(self.nvme_compare(self.write_file), 0)
diff --git a/tests/nvme_create_max_ns_test.py b/tests/nvme_create_max_ns_test.py
new file mode 100644
index 0000000..15e0770
--- /dev/null
+++ b/tests/nvme_create_max_ns_test.py
@@ -0,0 +1,97 @@ 
+# 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 <[e-mail]>
+#
+"""
+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.
+              - flabs : 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 = 0x1400000
+        self.ncap = 0x1400000
+        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()
diff --git a/tests/nvme_error_log_test.py b/tests/nvme_error_log_test.py
new file mode 100644
index 0000000..cedb24b
--- /dev/null
+++ b/tests/nvme_error_log_test.py
@@ -0,0 +1,86 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Smart Log Verification Testcase:-
+
+    1. Execute error-log on controller.
+    2. Execute error-log on each available namespace.
+
+"""
+
+from nose.tools import assert_equal
+from nvme_test import TestNVMe
+
+
+class TestNVMeErrorLogCmd(TestNVMe):
+
+    """
+    Represents Smart Log testcae.
+
+        - Attributes:
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeErrorLogCmd """
+        TestNVMe.__init__(self)
+        self.setup_log_dir(self.__class__.__name__)
+
+    def __del__(self):
+        """
+        Post Section for TestNVMeErrorLogCmd
+
+            - Call super class's destructor.
+        """
+        TestNVMe.__del__(self)
+
+    def get_error_log_ctrl(self):
+        """ Wrapper for executing error-log on controller.
+            - Args:
+                - None:
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        return self.get_error_log("0xFFFFFFFF")
+
+    def get_error_log_ns(self, nsid):
+        """ Wrapper for executing error-log on a namespace.
+            - Args:
+                - nsid: namespace id to be used in error-log command.
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        return self.get_error_log(nsid)
+
+    def get_error_log_all_ns(self):
+        """ Wrapper for executing error-log on all the namespaces.
+            - Args:
+                - None:
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        ns_list = self.get_ns_list()
+        for nsid in range(0, len(ns_list)):
+            self.get_error_log_ns(ns_list[nsid])
+        return 0
+
+    def test_get_error_log(self):
+        """ Testcase main """
+        assert_equal(self.get_error_log_ctrl(), 0)
+        assert_equal(self.get_error_log_all_ns(), 0)
diff --git a/tests/nvme_flush_test.py b/tests/nvme_flush_test.py
new file mode 100644
index 0000000..d080887
--- /dev/null
+++ b/tests/nvme_flush_test.py
@@ -0,0 +1,61 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Flush Command Testcase:-
+
+    1. Execute nvme flush on controller.
+
+"""
+
+from nose.tools import assert_equal
+from nvme_test import TestNVMe
+
+
+class TestNVMeFlushCmd(TestNVMe):
+
+    """
+    Represents Flush Testcase. Inherits TestNVMe class.
+
+        - Attributes:
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeFlushCmd """
+        TestNVMe.__init__(self)
+        self.setup_log_dir(self.__class__.__name__)
+
+    def __del__(self):
+        """ Post Section for TestNVMeFlushCmd """
+        TestNVMe.__del__(self)
+
+    def nvme_flush(self):
+        """ Wrapper for nvme flush command.
+           - Args:
+               - None
+           - Returns:
+               - None
+        """
+        flush_cmd = "nvme flush " + self.ctrl + " -n " + str(self.default_nsid)
+        print flush_cmd
+        return self.exec_cmd(flush_cmd)
+
+    def test_nvme_flush(self):
+        """ Testcase main """
+        assert_equal(self.nvme_flush(), 0)
diff --git a/tests/nvme_format_test.py b/tests/nvme_format_test.py
new file mode 100644
index 0000000..e5da23f
--- /dev/null
+++ b/tests/nvme_format_test.py
@@ -0,0 +1,145 @@ 
+# 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 <[e-mail]>
+#
+"""
+Namespace Format testcase :-
+
+    1. Create, attach, detach, delete primary namespace and
+       extract the supported format information from default namespace:-
+           - List of the supported format.
+           - List of Metadata Size per format. Based on this we calculate
+             data protection parameter at the time of namespace.
+           - List of LBA Data Size per format.
+    2. Use the collected information and iterate through each supported
+       format:-
+           - Create namespace.
+           - Attach namespace.
+           - Run IOs on the namespace under test.
+           - Detach namespace
+           - Delete Namespace.
+"""
+
+import time
+import subprocess
+from nose.tools import assert_equal
+from nvme_test import TestNVMe
+
+
+class TestNVMeFormatCmd(TestNVMe):
+
+    """
+    Represents Format testcase.
+
+        - Attributes:
+              - dps : data protection information.
+              - flabs : LBA format information.
+              - nsze : namespace size.
+              - ncap : namespace capacity.
+              - ctrl_id : controller id.
+              - lba_format_list : lis of supported format.
+              - ms_list : list of metadat size per format.
+              - lbads_list : list of LBA data size per format.
+              - test_log_dir : directory for logs, temp files.
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeFormatCmd """
+        TestNVMe.__init__(self)
+        self.dps = 0                 # ns data protection settings
+        self.flbas = 0               # ns formattes logical block settings
+        self.nsze = 0x1400000        # ns size
+        self.ncap = 0x1400000        # ns capacity
+        self.ctrl_id = self.get_ctrl_id()
+        self.lba_format_list = []
+        self.ms_list = []
+        self.lbads_list = []
+        self.test_log_dir = self.log_dir + "/" + self.__class__.__name__
+        self.setup_log_dir(self.__class__.__name__)
+        self.delete_all_ns()
+        time.sleep(1)
+
+    def __del__(self):
+        """
+        Post Section for TestNVMeFormatCmd
+
+            - 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 attach_detach_primary_ns(self):
+        """ Extract supported format information using default namespace """
+        assert_equal(self.create_and_validate_ns(self.default_nsid,
+                                                 self.nsze,
+                                                 self.ncap,
+                                                 self.flbas,
+                                                 self.dps), 0)
+        assert_equal(self.attach_ns(self.ctrl_id, self.default_nsid), 0)
+        # read lbaf information
+        id_ns = "nvme id-ns " + self.ctrl + \
+                " -n1 | grep ^lbaf | awk '{print $2}' | tr -s \"\\n\" \" \""
+        proc = subprocess.Popen(id_ns, shell=True, stdout=subprocess.PIPE)
+        self.lba_format_list = proc.stdout.read().strip().split(" ")
+        if proc.wait() == 0:
+            # read lbads information
+            id_ns = "nvme id-ns " + self.ctrl + \
+                    " -n1 | grep ^lbaf | awk '{print $5}'" + \
+                    " | cut -f 2 -d ':' | tr -s \"\\n\" \" \""
+            proc = subprocess.Popen(id_ns, shell=True, stdout=subprocess.PIPE)
+            self.lbads_list = proc.stdout.read().strip().split(" ")
+            # read metadata information
+            id_ns = "nvme id-ns " + self.ctrl + \
+                    " -n1 | grep ^lbaf | awk '{print $4}'" + \
+                    " | cut -f 2 -d ':' | tr -s \"\\n\" \" \""
+            proc = subprocess.Popen(id_ns, shell=True, stdout=subprocess.PIPE)
+            self.ms_list = proc.stdout.read().strip().split(" ")
+            assert_equal(self.detach_ns(self.ctrl_id, self.default_nsid), 0)
+            assert_equal(self.delete_and_validate_ns(self.default_nsid), 0)
+            self.nvme_reset_ctrl()
+
+    def test_format_ns(self):
+        """ Testcase main """
+        # extract the supported format information.
+        self.attach_detach_primary_ns()
+
+        # iterate through all supported format
+        for i in range(0, len(self.lba_format_list)):
+            print "\nlba format " + str(self.lba_format_list[i]) + \
+                  " lbad       " + str(self.lbads_list[i]) + \
+                  " ms         " + str(self.ms_list[i])
+            metadata_size = 1 if self.ms_list[i] == '8' else 0
+            err = self.create_and_validate_ns(self.default_nsid,
+                                              self.nsze,
+                                              self.ncap,
+                                              self.lba_format_list[i],
+                                              metadata_size)
+            assert_equal(err, 0)
+            assert_equal(self.attach_ns(self.ctrl_id, self.default_nsid), 0)
+            self.run_ns_io(self.default_nsid, self.lbads_list[i])
+            time.sleep(5)
+            assert_equal(self.detach_ns(self.ctrl_id, self.default_nsid), 0)
+            assert_equal(self.delete_and_validate_ns(self.default_nsid), 0)
+            self.nvme_reset_ctrl()
diff --git a/tests/nvme_get_features_test.py b/tests/nvme_get_features_test.py
new file mode 100644
index 0000000..7511de9
--- /dev/null
+++ b/tests/nvme_get_features_test.py
@@ -0,0 +1,103 @@ 
+# 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 <[e-mail]>
+#
+"""
+Get Features Testcase:-
+
+Test the Mandetory features with get features command:-
+    1. 01h rbitration.
+    2. 02h M Power Management.
+    3. 04h M Temperature Threshold.
+    4. 05h M Error Recovery.
+    5. 07h M Number of Queues.
+    6. 08h M Interrupt Coalescing.
+    7. 09h M Interrupt Vector Configuration.
+    8. 0Ah M Write Atomicity Normal.
+    9. 0Bh M Asynchronous Event Configuration.
+"""
+
+import subprocess
+from nose.tools import assert_equal
+from nvme_test import TestNVMe
+
+
+class TestNVMeGetMandetoryFeatures(TestNVMe):
+
+    """
+    Represents Get Features testcase.
+
+        - Attributes:
+              - feature_id_list : list of the mandetory features.
+              - get_vector_list_cmd : vector list collection for 09h.
+              - vector_list : vector list to hold the interrupt vectors.
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeGetMandetoryFeatures """
+        TestNVMe.__init__(self)
+        self.setup_log_dir(self.__class__.__name__)
+        self.feature_id_list = ["0x01", "0x02", "0x04", "0x05", "0x07",
+                                "0x08", "0x09", "0x0A", "0x0B"]
+        get_vector_list_cmd = "cat /proc/interrupts | grep nvme |" \
+                              " cut -d : -f 1 | tr -d ' ' | tr '\n' ' '"
+        proc = subprocess.Popen(get_vector_list_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        self.vector_list = []
+        self.vector_list = proc.stdout.read().strip().split(" ")
+
+    def __del__(self):
+        """ Post Section for TestNVMeGetMandetoryFeatures
+
+            Call super class's destructor.
+        """
+        TestNVMe.__del__(self)
+
+    def get_mandetory_features(self, feature_id):
+        """ Wrapper for NVMe get features command
+            - Args:
+                - feature_id : feature id to be used with get feature command.
+            - Returns:
+                - None
+        """
+        if str(feature_id) == "0x09":
+            for vector in self.vector_list:
+                get_feat_cmd = "nvme get-feature " + self.ctrl + \
+                               " --feature-id=" + str(feature_id) + \
+                               " --cdw11=" + str(vector)
+                proc = subprocess.Popen(get_feat_cmd,
+                                        shell=True,
+                                        stdout=subprocess.PIPE)
+                feature_output = proc.communicate()[0]
+                print feature_output
+                assert_equal(proc.wait(), 0)
+        else:
+            get_feat_cmd = "nvme get-feature " + self.ctrl + \
+                           " --feature-id=" + str(feature_id)
+            proc = subprocess.Popen(get_feat_cmd,
+                                    shell=True,
+                                    stdout=subprocess.PIPE)
+            feature_output = proc.communicate()[0]
+            print feature_output
+            assert_equal(proc.wait(), 0)
+
+    def test_get_mandetory_features(self):
+        """ Testcase main """
+        for feature_id in self.feature_id_list:
+            self.get_mandetory_features(feature_id)
diff --git a/tests/nvme_read_write_test.py b/tests/nvme_read_write_test.py
new file mode 100644
index 0000000..a5f4579
--- /dev/null
+++ b/tests/nvme_read_write_test.py
@@ -0,0 +1,72 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Read/Write Testcae:-
+
+    1. Create data file with specific pattern outside of the device under test.
+    2. Write data file on the namespace under test.
+    3. Read the data from the namespace under test into different file.
+    4. Compare file in #1 and #3.
+"""
+
+import filecmp
+from nose.tools import assert_equal
+from nvme_test_io import TestNVMeIO
+
+
+class TestNVMeReadWriteTest(TestNVMeIO):
+
+    """
+    Represents NVMe read, write testcase.
+
+        - Attributes:
+              - start_block : starting block of to perform IO.
+              - compare_file : data file to use in nvme comapre commmand.
+              - test_log_dir : directory for logs, temp files.
+    """
+    def __init__(self):
+        """ Pre Section for TestNVMeReadWriteTest """
+        TestNVMeIO.__init__(self)
+        self.start_block = 1023
+        self.test_log_dir = self.log_dir + "/" + self.__class__.__name__
+        self.setup_log_dir(self.__class__.__name__)
+        self.write_file = self.test_log_dir + "/" + self.write_file
+        self.read_file = self.test_log_dir + "/" + self.read_file
+        self.create_data_file(self.write_file, self.data_size, "15")
+        open(self.read_file, 'a').close()
+
+    def __del__(self):
+        """ Post Section for TestNVMeReadWriteTest """
+        TestNVMeIO.__del__(self)
+
+    def read_validate(self):
+        """ Validate the data file read
+            - Args:
+                - None
+            - Returns:
+                - returns 0 on success, 1 on failure.
+        """
+        return 0 if filecmp.cmp(self.read_file, self.write_file) else 1
+
+    def test_nvme_write(self):
+        """ Testcaes main  """
+        assert_equal(self.nvme_write(), 0)
+        assert_equal(self.nvme_read(), 0)
+        assert_equal(self.read_validate(), 0)
diff --git a/tests/nvme_simple_template_test.py b/tests/nvme_simple_template_test.py
new file mode 100644
index 0000000..b6736da
--- /dev/null
+++ b/tests/nvme_simple_template_test.py
@@ -0,0 +1,55 @@ 
+# 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 <[e-mail]>
+#
+""" Simple Template test example :-
+"""
+
+from nvme_test import TestNVMe
+
+
+class TestNVMeSimpleTestTemplate(TestNVMe):
+
+    """ Represents Simple NVMe test """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeSimpleTestTemplate. """
+        TestNVMe.__init__(self)
+        self.setup_log_dir(self.__class__.__name__)
+        # Add this test specific variables here
+
+    def __del__(self):
+        """ Post Section for TestNVMeSimpleTestTemplate
+
+            Call super class's destructor.
+        """
+        # Add this test specific cleanup code here
+        TestNVMe.__del__(self)
+
+    def simple_template_test(self):
+        """ Wrapper for this test specific functions
+            - Args:
+                - None
+            - Returns:
+                - None
+        """
+        pass
+
+    def test_get_mandetory_features(self):
+        """ Testcase main """
+        self.simple_template_test()
diff --git a/tests/nvme_smart_log_test.py b/tests/nvme_smart_log_test.py
new file mode 100644
index 0000000..e1eb6e5
--- /dev/null
+++ b/tests/nvme_smart_log_test.py
@@ -0,0 +1,86 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Smart Log Verification Testcase:-
+
+    1. Execute smat-log on controller.
+    2. Execute smart-log on each available namespace.
+
+"""
+
+from nose.tools import assert_equal
+from nvme_test import TestNVMe
+
+
+class TestNVMeSmartLogCmd(TestNVMe):
+
+    """
+    Represents Smart Log testcae.
+
+        - Attributes:
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeSmartLogCmd """
+        TestNVMe.__init__(self)
+        self.setup_log_dir(self.__class__.__name__)
+
+    def __del__(self):
+        """
+        Post Section for TestNVMeSmartLogCmd
+
+            - Call super class's destructor.
+        """
+        TestNVMe.__del__(self)
+
+    def get_smart_log_ctrl(self):
+        """ Wrapper for executing smart-log on controller.
+            - Args:
+                - None:
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        return self.get_smart_log("0xFFFFFFFF")
+
+    def get_smart_log_ns(self, nsid):
+        """ Wrapper for executing smart-log on a namespace.
+            - Args:
+                - nsid: namespace id to be used in smart-log command.
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        return self.get_smart_log(nsid)
+
+    def get_smart_log_all_ns(self):
+        """ Wrapper for executing smart-log on all the namespaces.
+            - Args:
+                - None:
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        ns_list = self.get_ns_list()
+        for nsid in range(0, len(ns_list)):
+            self.get_smart_log_ns(ns_list[nsid])
+        return 0
+
+    def test_smart_log(self):
+        """ Testcase main """
+        assert_equal(self.get_smart_log_ctrl(), 0)
+        assert_equal(self.get_smart_log_all_ns(), 0)
diff --git a/tests/nvme_test.py b/tests/nvme_test.py
new file mode 100644
index 0000000..c3ee16e
--- /dev/null
+++ b/tests/nvme_test.py
@@ -0,0 +1,395 @@ 
+# 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 <[e-mail]>
+#
+""" Base class for all the testcases
+"""
+
+import re
+import os
+import sys
+import json
+import mmap
+import stat
+import time
+import shutil
+import string
+import subprocess
+from nose import tools
+from nose.tools import assert_equal
+from nvme_test_logger import TestNVMeLogger
+
+
+class TestNVMe(object):
+
+    """
+    Represents a testcase, each testcase shuold inherit this
+    class or appropriate subclass which is a child of this class.
+
+    Common utility functions used in various testcases.
+
+        - Attributes:
+            - ctrl : NVMe Controller.
+            - ns1 : default namespace.
+            - default_nsid : default namespace id.
+            - config_file : configuration file.
+            - clear_log_dir : default log directory.
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMe. """
+        # common code used in various testcases.
+        self.ctrl = "XXX"
+        self.ns1 = "XXX"
+        self.test_log_dir = "XXX"
+        self.default_nsid = 0x1
+        self.config_file = 'config.json'
+
+        self.load_config()
+        self.validate_pci_device()
+
+    def __del__(self):
+        """ Post Section for TestNVMe. """
+        if self.clear_log_dir is True:
+            shutil.rmtree(self.log_dir, ignore_errors=True)
+
+    @tools.nottest
+    def validate_pci_device(self):
+        """ Validate underlaying device belogs to pci subsystem.
+            - Args:
+                - None
+            - Returns:
+                - None
+        """
+        cmd = cmd = "find /sys/devices -name \\*nvme0 | grep -i pci"
+        err = subprocess.call(cmd, shell=True)
+        assert_equal(err, 0, "ERROR : Only NVMe PCI subsystem is supported")
+
+    @tools.nottest
+    def load_config(self):
+        """ Load Basic test configuration.
+            - Args:
+                - None
+            - Returns:
+                - None
+        """
+        with open(self.config_file) as data_file:
+            config = json.load(data_file)
+            self.ctrl = config['controller']
+            self.ns1 = config['ns1']
+            self.log_dir = config['log_dir']
+            self.clear_log_dir = False
+
+            if self.clear_log_dir is True:
+                shutil.rmtree(self.log_dir, ignore_errors=True)
+
+            if not os.path.exists(self.log_dir):
+                os.makedirs(self.log_dir)
+
+    @tools.nottest
+    def setup_log_dir(self, test_name):
+        """ Set up the log directory for a testcase
+            Args:
+              - test_name : name of the testcase.
+            Returns:
+              - None
+        """
+        self.test_log_dir = self.log_dir + "/" + test_name
+        if not os.path.exists(self.test_log_dir):
+            os.makedirs(self.test_log_dir)
+        sys.stdout = TestNVMeLogger(self.test_log_dir + "/" + "stdout.log")
+        sys.stderr = TestNVMeLogger(self.test_log_dir + "/" + "stderr.log")
+
+    @tools.nottest
+    def exec_cmd(self, cmd):
+        """ Wrapper for executing a shell command and return the result. """
+        proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
+        return proc.wait()
+
+    @tools.nottest
+    def nvme_reset_ctrl(self):
+        """ Wrapper for nvme reset command.
+            - Args:
+                - None:
+            - Returns:
+                - None
+        """
+        nvme_reset_cmd = "nvme reset " + self.ctrl
+        err = subprocess.call(nvme_reset_cmd,
+                              shell=True,
+                              stdout=subprocess.PIPE)
+        assert_equal(err, 0, "ERROR : nvme reset failed")
+        time.sleep(5)
+        rescan_cmd = "echo 1 > /sys/bus/pci/rescan"
+        proc = subprocess.Popen(rescan_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE,
+                                stderr=subprocess.PIPE)
+        time.sleep(5)
+        assert_equal(proc.wait(), 0, "ERROR : pci rescan failed")
+
+    @tools.nottest
+    def get_ctrl_id(self):
+        """ Wrapper for extracting the controller id.
+            - Args:
+                - None
+            - Returns:
+                - controller id.
+        """
+        get_ctrl_id = "nvme list-ctrl " + self.ctrl
+        proc = subprocess.Popen(get_ctrl_id,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        err = proc.wait()
+        assert_equal(err, 0, "ERROR : nvme list-ctrl failed")
+        line = proc.stdout.readline()
+        ctrl_id = line.split(":")[1].strip()
+        return ctrl_id
+
+    @tools.nottest
+    def get_ns_list(self):
+        """ Wrapper for extrating the namespace list.
+            - Args:
+                - None
+            - Returns:
+                - List of the namespaces.
+        """
+        ns_list = []
+        ns_list_cmd = "nvme list-ns " + self.ctrl
+        proc = subprocess.Popen(ns_list_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        assert_equal(proc.wait(), 0, "ERROR : nvme list namespace failed")
+        for line in proc.stdout:
+            ns_list.append(string.replace(line.split(":")[1], '\n', ''))
+
+        return ns_list
+
+    @tools.nottest
+    def get_max_ns(self):
+        """ Wrapper for extracting maximum number of namspaces supported.
+            - Args:
+                - None
+            - Returns:
+                - maximum number of namespaces supported.
+        """
+        pattern = re.compile("^nn[ ]+: [0-9]", re.IGNORECASE)
+        max_ns = -1
+        max_ns_cmd = "nvme id-ctrl " + self.ctrl
+        proc = subprocess.Popen(max_ns_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        err = proc.wait()
+        assert_equal(err, 0, "ERROR : reading maximum namespace count failed")
+
+        for line in proc.stdout:
+            if pattern.match(line):
+                max_ns = line.split(":")[1].strip()
+                break
+        print max_ns
+        return int(max_ns)
+
+    @tools.nottest
+    def delete_all_ns(self):
+        """ Wrapper for deleting all the namespaces.
+            - Args:
+                - None
+            - Returns:
+                - None
+        """
+        delete_ns_cmd = "nvme delete-ns " + self.ctrl + " -n 0xFFFFFFFF"
+        assert_equal(self.exec_cmd(delete_ns_cmd), 0)
+        list_ns_cmd = "nvme list-ns " + self.ctrl + " --all | wc -l"
+        proc = subprocess.Popen(list_ns_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        output = proc.stdout.read().strip()
+        assert_equal(output, '0', "ERROR : deleting all namespace failed")
+
+    @tools.nottest
+    def create_ns(self, nsze, ncap, flbas, dps):
+        """ Wrapper for creating a namespace.
+            - Args:
+                - nsze : new namespace size.
+                - ncap : new namespace capacity.
+                - flbas : new namespace format.
+                - dps : new namespace data protection information.
+            - Returns:
+                - return code of the nvme create namespace command.
+        """
+        create_ns_cmd = "nvme create-ns " + self.ctrl + " --nsze=" + \
+                        str(nsze) + " --ncap=" + str(ncap) + \
+                        " --flbas=" + str(flbas) + " --dps=" + str(dps)
+        return self.exec_cmd(create_ns_cmd)
+
+    @tools.nottest
+    def create_and_validate_ns(self, nsid, nsze, ncap, flbas, dps):
+        """ Wrapper for creating and validating a namespace.
+            - Args:
+                - nsid : new namespace id.
+                - nsze : new namespace size.
+                - ncap : new namespace capacity.
+                - flbas : new namespace format.
+                - dps : new namespace data protection information.
+            - Returns:
+                - return 0 on success, error code on failure.
+        """
+        err = self.create_ns(nsze, ncap, flbas, dps)
+        if err == 0:
+            time.sleep(2)
+            id_ns_cmd = "nvme id-ns " + self.ctrl + " -n " + str(nsid)
+            err = subprocess.call(id_ns_cmd,
+                                  shell=True,
+                                  stdout=subprocess.PIPE)
+        return err
+
+    @tools.nottest
+    def attach_ns(self, ctrl_id, ns_id):
+        """ Wrapper for attaching the namespace.
+            - Args:
+                - ctrl_id : controller id to which namespace to be attched.
+                - nsid : new namespace id.
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        attach_ns_cmd = "nvme attach-ns " + self.ctrl + \
+                        " --namespace-id=" + str(ns_id) + \
+                        " --controllers=" + ctrl_id
+        err = subprocess.call(attach_ns_cmd,
+                              shell=True,
+                              stdout=subprocess.PIPE)
+        time.sleep(5)
+        if err == 0:
+            # enumerate new namespace block device
+            self.nvme_reset_ctrl()
+            time.sleep(5)
+            # check if new namespace block device exists
+            err = 0 if stat.S_ISBLK(os.stat(self.ns1).st_mode) else 1
+        return err
+
+    @tools.nottest
+    def detach_ns(self, ctrl_id, nsid):
+        """ Wrapper for detaching the namespace.
+            - Args:
+                - ctrl_id : controller id to which namespace to be attched.
+                - nsid : new namespace id.
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        detach_ns_cmd = "nvme detach-ns " + self.ctrl + \
+                        " --namespace-id=" + str(nsid) + \
+                        " --controllers=" + ctrl_id
+        return subprocess.call(detach_ns_cmd,
+                               shell=True,
+                               stdout=subprocess.PIPE)
+
+    @tools.nottest
+    def delete_and_validate_ns(self, nsid):
+        """ Wrapper for deleting and validating that namespace is deleted.
+            - Args:
+                - nsid : new namespace id.
+            - Returns:
+                - 0 on success, 1 on failure.
+        """
+        # delete the namespace
+        delete_ns_cmd = "nvme delete-ns " + self.ctrl + " -n " + str(nsid)
+        err = subprocess.call(delete_ns_cmd,
+                              shell=True,
+                              stdout=subprocess.PIPE)
+        assert_equal(err, 0, "ERROR : delete namespace failed")
+        return err
+
+    def get_smart_log(self, nsid):
+        """ Wrapper for nvme smart-log command.
+            - Args:
+                - nsid : namespace id to get smart log from.
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        smart_log_cmd = "nvme smart-log " + self.ctrl + " -n " + str(nsid)
+        print smart_log_cmd
+        proc = subprocess.Popen(smart_log_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        err = proc.wait()
+        assert_equal(err, 0, "ERROR : nvme smart log failed")
+
+        for line in proc.stdout:
+            if "data_units_read" in line:
+                data_units_read = \
+                    string.replace(line.split(":")[1].strip(), ",", "")
+            if "data_units_written" in line:
+                data_units_written = \
+                    string.replace(line.split(":")[1].strip(), ",", "")
+            if "host_read_commands" in line:
+                host_read_commands = \
+                    string.replace(line.split(":")[1].strip(), ",", "")
+            if "host_write_commands" in line:
+                host_write_commands = \
+                    string.replace(line.split(":")[1].strip(), ",", "")
+
+        print "data_units_read " + data_units_read
+        print "data_units_written " + data_units_written
+        print "host_read_commands " + host_read_commands
+        print "host_write_commands " + host_write_commands
+        return err
+
+    def get_error_log(self, nsid):
+        """ Wrapper for nvme error-log command.
+            - Args:
+                - nsid : namespace id to get error log from.
+            - Returns:
+                - 0 on success, error code on failure.
+        """
+        pattern = re.compile("^ Entry\[[ ]*[0-9]+\]")
+        error_log_cmd = "nvme error-log " + self.ctrl + " -n " + str(nsid)
+        proc = subprocess.Popen(error_log_cmd,
+                                shell=True,
+                                stdout=subprocess.PIPE)
+        err = proc.wait()
+        assert_equal(err, 0, "ERROR : nvme error log failed")
+        line = proc.stdout.readline()
+        err_log_entry_count = int(line.split(" ")[5].strip().split(":")[1])
+        entry_count = 0
+        for line in proc.stdout:
+            if pattern.match(line):
+                entry_count += 1
+
+        return 0 if err_log_entry_count == entry_count else 1
+
+    def run_ns_io(self, nsid, lbads):
+        """ Wrapper to run ios on namespace under test.
+            - Args:
+                - lbads : LBA Data size supported in power of 2 format.
+            - Returns:
+                - None
+        """
+        block_size = mmap.PAGESIZE if lbads < 9 else 2 ** int(lbads)
+        ns_path = self.ctrl + "n" + str(nsid)
+        io_cmd = "dd if=" + ns_path + " of=/dev/null" + " bs=" + \
+                 str(block_size) + " count=10 > /dev/null 2>&1"
+        print io_cmd
+        run_io = subprocess.Popen(io_cmd, shell=True, stdout=subprocess.PIPE)
+        run_io_result = run_io.communicate()[1]
+        assert_equal(run_io_result, None)
+        io_cmd = "dd if=/dev/zero of=" + ns_path + " bs=" + \
+                 str(block_size) + " count=10 > /dev/null 2>&1"
+        print io_cmd
+        run_io = subprocess.Popen(io_cmd, shell=True, stdout=subprocess.PIPE)
+        run_io_result = run_io.communicate()[1]
+        assert_equal(run_io_result, None)
diff --git a/tests/nvme_test_io.py b/tests/nvme_test_io.py
new file mode 100644
index 0000000..e2a6b46
--- /dev/null
+++ b/tests/nvme_test_io.py
@@ -0,0 +1,99 @@ 
+# 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 <[e-mail]>
+#
+""" Inherit TestNVMeIO for nvme read/write operations """
+
+import os
+from nose import tools
+from nvme_test import TestNVMe
+
+
+class TestNVMeIO(TestNVMe):
+
+    """
+    Variable and Methods required to perform nvme read/write.
+
+        - Attributes:
+              - data_size : data size to perform IO.
+              - start_block : starting block of to perform IO.
+              - block_count : Number of blocks to use in IO.
+              - write_file : data file to use in nvme write command.
+              - read_file : data file to use in nvme read command.
+    """
+
+    def __init__(self):
+        """ Pre Section for TestNVMeIO """
+        TestNVMe.__init__(self)
+        # common code used in various testcases.
+        self.data_size = 512
+        self.start_block = 0
+        self.block_count = 0
+        self.write_file = "write_file.txt"
+        self.read_file = "read_file.txt"
+
+    def __del__(self):
+        """ Post Section for TestNVMeIO """
+        TestNVMe.__del__(self)
+
+    @tools.nottest
+    def create_data_file(self, pathname, data_size, pattern):
+        """ Creates data file with specific pattern
+            - Args:
+                - pathname : data file path name.
+                - data_size : total size of the data.
+                - pattern : data pattern to create file.
+            - Returns:
+            None
+        """
+        pattern_len = len(pattern)
+        data_file = open(pathname, "w")
+        for i in range(0, data_size):
+            data_file.write(pattern[i % pattern_len])
+        data_file.flush()
+        os.fsync(data_file.fileno())
+        data_file.close()
+
+    @tools.nottest
+    def nvme_write(self):
+        """ Wrapper for nvme write operation
+            - Args:
+                - None
+            - Returns:
+                - return code for nvme write command.
+        """
+        write_cmd = "nvme write " + self.ns1 + " --start-block=" + \
+                    str(self.start_block) + " --block-count=" + \
+                    str(self.block_count) + " --data-size=" + \
+                    str(self.data_size) + " --data=" + self.write_file
+        return self.exec_cmd(write_cmd)
+
+    @tools.nottest
+    def nvme_read(self):
+        """ Wrapper for nvme read operation
+            - Args:
+                - None
+            - Returns:
+                - return code for nvme read command.
+        """
+        read_cmd = "nvme read " + self.ns1 + " --start-block=" + \
+                   str(self.start_block) + " --block-count=" + \
+                   str(self.block_count) + " --data-size=" + \
+                   str(self.data_size) + " --data=" + self.read_file
+        print read_cmd
+        return self.exec_cmd(read_cmd)
diff --git a/tests/nvme_test_logger.py b/tests/nvme_test_logger.py
new file mode 100644
index 0000000..c59fa18
--- /dev/null
+++ b/tests/nvme_test_logger.py
@@ -0,0 +1,52 @@ 
+# 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 <[e-mail]>
+#
+"""
+Logger for NVMe Test Framwwork:-
+
+"""
+import sys
+
+
+class TestNVMeLogger(object):
+    """ Represents Logger for NVMe Testframework.  """
+    def __init__(self, log_file_path):
+        """ Logger setup
+            - Args:
+                log_file_path : path to store the log.
+        """
+        self.terminal = sys.stdout
+        self.log = open(log_file_path, "w")
+
+    def write(self, log_message):
+        """ Logger setup
+            - Args:
+                log_message: string to write in the log file.
+            - Returns:
+                None
+        """
+        self.terminal.write(log_message)
+        self.log.write(log_message)
+
+    def flush(self):
+        """ This flush method is needed for python 3 compatibility.
+            this handles the flush command by doing nothing.
+            you might want to specify some extra behavior here.
+        """
+        pass
diff --git a/tests/nvme_writeuncor_test.py b/tests/nvme_writeuncor_test.py
new file mode 100644
index 0000000..9f96f63
--- /dev/null
+++ b/tests/nvme_writeuncor_test.py
@@ -0,0 +1,76 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Write Compare Testcae:-
+
+    1. Read block of data successfully.
+    2. Issue write uncorrectable to block of data.
+    3. Attempt to read from same block; shall fail.
+    4. Issue a write command to first block of data.
+    5. Read from the same block; shall pass.
+
+"""
+
+from nose.tools import assert_equal, assert_not_equal
+from nvme_test_io import TestNVMeIO
+
+
+class TestNVMeUncor(TestNVMeIO):
+
+    """
+    Represents NVMe Write Uncorrecatble testcase.
+        - Attributes:
+              - start_block : starting block of to perform IO.
+              - test_log_dir : directory for logs, temp files.
+    """
+
+    def __init__(self):
+        """ Constructor TestNVMeUncor """
+        TestNVMeIO.__init__(self)
+        self.start_block = 1023
+        self.setup_log_dir(self.__class__.__name__)
+        self.write_file = self.test_log_dir + "/" + self.write_file
+        self.read_file = self.test_log_dir + "/" + self.read_file
+        self.create_data_file(self.write_file, self.data_size, "15")
+        open(self.read_file, 'a').close()
+
+    def __del__(self):
+        """ Post Section for TestNVMeUncor """
+        TestNVMeIO.__del__(self)
+
+    def write_uncor(self):
+        """ Wrapper for nvme write uncorrectable
+            - Args:
+                - None
+            - Returns:
+                - return code of nvme write uncorrectable command.
+        """
+        write_uncor_cmd = "nvme write-uncor " + self.ns1 + \
+                          " --start-block=" + str(self.start_block) + \
+                          " --block-count=" + str(self.block_count)
+        return self.exec_cmd(write_uncor_cmd)
+
+    def test_write_uncor(self):
+        """ Testcase main """
+        assert_equal(self.nvme_read(), 0)
+        assert_equal(self.write_uncor(), 0)
+        assert_not_equal(self.nvme_read(), 0)
+        assert_equal(self.nvme_write(), 0)
+        assert_equal(self.nvme_read(), 0)
diff --git a/tests/nvme_writezeros_test.py b/tests/nvme_writezeros_test.py
new file mode 100644
index 0000000..157fd78
--- /dev/null
+++ b/tests/nvme_writezeros_test.py
@@ -0,0 +1,102 @@ 
+# 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 <[e-mail]>
+#
+"""
+NVMe Write Zeros:-
+
+    1. Issue a write command to block of data.
+    2. Read from same block to verify data pattern.
+    3. Issue write zeros to the block of data.
+    4. Read from same block, should be all zeroes.
+
+"""
+
+import filecmp
+from nose.tools import assert_equal
+from nvme_test_io import TestNVMeIO
+
+
+class TestNVMeWriteZeros(TestNVMeIO):
+
+    """
+    Represents NVMe Write Zero Testcase.
+
+        - Attributes:
+              - zero_file : file with all '\0' to compare the zero data.
+              - data_size : data size to perform IO.
+              - start_block : starting block of to perform IO.
+              - block_count: Number of blocks to use in IO.
+              - test_log_dir : directory for logs, temp files.
+    """
+    def __init__(self):
+        """ Pre Section for TestNVMeWriteZeros """
+        TestNVMeIO.__init__(self)
+        self.start_block = 1023
+        self.block_count = 0
+        self.setup_log_dir(self.__class__.__name__)
+        self.write_file = self.test_log_dir + "/" + self.write_file
+        self.read_file = self.test_log_dir + "/" + self.read_file
+        self.zero_file = self.test_log_dir + "/" + "zero_file.txt"
+        self.create_data_file(self.write_file, self.data_size, "15")
+        self.create_data_file(self.zero_file, self.data_size, '\0')
+        open(self.read_file, 'a').close()
+
+    def __del__(self):
+        """ Post Section for TestNVMeWriteZeros """
+        TestNVMeIO.__del__(self)
+
+    def write_zeroes(self):
+        """ Wrapper for nvme write-zeroe
+            - Args:
+                - None
+            - Returns:
+                - return code for nvme write command.
+        """
+        write_zeroes_cmd = "nvme write-zeroes " + self.ns1 + \
+                           " --start-block=" + str(self.start_block) + \
+                           " --block-count=" + str(self.block_count)
+        return self.exec_cmd(write_zeroes_cmd)
+
+    def validate_write_read(self):
+        """ Validate the file which had been read from the device
+            - Args:
+                - None
+            - Returns:
+                - 0 on success, 1 on failure
+        """
+        return 0 if filecmp.cmp(self.write_file, self.read_file) is True else 1
+
+    def validate_zeroes(self):
+        """
+        Validate the data which is zeroed out via write-zeroes
+            - Args:
+                - None
+            - Returns:
+                - 0 on success, 1 on failure
+         """
+        return 0 if filecmp.cmp(self.zero_file, self.read_file) is True else 1
+
+    def test_write_zeros(self):
+        """ Testcae main """
+        assert_equal(self.nvme_write(), 0)
+        assert_equal(self.nvme_read(), 0)
+        assert_equal(self.validate_write_read(), 0)
+        assert_equal(self.write_zeroes(), 0)
+        assert_equal(self.nvme_read(), 0)
+        assert_equal(self.validate_zeroes(), 0)