#!/usr/bin/python3

# This file is part of Cockpit.
#
# Copyright (C) 2015 Red Hat, Inc.
#
# Cockpit is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Cockpit 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Cockpit; If not, see <http://www.gnu.org/licenses/>.

import parent
import unittest
import time

from storagelib import *
from testlib import *


class TestStorageResize(StorageCase):

    # LUKS uses memory hard PBKDF, 1 GiB is not enough; see https://bugzilla.redhat.com/show_bug.cgi?id=1881829
    provision = {
        "0": {"memory_mb": 1536}
    }

    def checkResize(self, fsys, crypto, can_shrink, can_grow, shrink_needs_unmount=None, grow_needs_unmount=None,
                    need_passphrase=False):
        m = self.machine
        b = self.browser

        if crypto:
            fsys_row = 2
            fsys_tab = 1
        else:
            fsys_row = 1
            fsys_tab = 2

        self.login_and_go("/storage")
        m.add_disk("500M", serial="DISK1")
        b.wait_in_text("#drives", "DISK1")

        m.execute("vgcreate TEST /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_DISK1")
        m.execute("lvcreate TEST -n vol -L 200m")
        b.wait_in_text("#devices", "TEST")
        b.click('#devices tr:contains("TEST")')
        b.wait_visible("#storage-detail")
        self.content_row_wait_in_col(1, 2, "/dev/TEST/vol")

        self.content_head_action(1, "Format")
        self.dialog_wait_open()
        self.dialog_wait_apply_enabled()
        self.dialog_set_val("name", "FSYS")
        self.dialog_set_val("type", fsys)
        self.dialog_set_val("mount_point", "/run/foo")
        if crypto:
            self.dialog_set_val("crypto.on", crypto)
            self.dialog_set_val("passphrase", "vainu-reku-toma-rolle-kaja")
            self.dialog_set_val("passphrase2", "vainu-reku-toma-rolle-kaja")
        self.dialog_apply()
        self.dialog_wait_close()
        self.content_tab_wait_in_info(fsys_row, fsys_tab, "Name", "FSYS")
        self.content_tab_wait_in_info(fsys_row, fsys_tab, "Mount point", "/run/foo")

        if can_grow:
            self.content_tab_action(1, 1, "Grow")
            self.dialog_wait_open()
            self.dialog_wait_apply_enabled()
            if grow_needs_unmount:
                b.wait_in_text("#dialog", "Proceeding will unmount all filesystems on it.")
            self.dialog_set_val("size", 400)
            if need_passphrase:
                self.dialog_set_val("passphrase", "vainu-reku-toma-rolle-kaja")
            self.dialog_apply()
            self.dialog_wait_close()
            # HACK - https://github.com/storaged-project/udisks/pull/631
            m.execute("udevadm trigger")
            self.content_tab_wait_in_info(1, 1, "Size", "400 MiB")
            if grow_needs_unmount:
                self.content_head_action(fsys_row, "Mount")
                self.confirm()
                self.wait_mounted(fsys_row, fsys_tab)
            size = int(m.execute("df -k --output=size /run/foo | tail -1").strip())
            assert (size > 300000)
        else:
            self.wait_content_tab_action_disabled(1, 1, "Grow")

        if can_shrink:
            self.content_tab_action(1, 1, "Shrink")
            self.dialog_wait_open()
            self.dialog_wait_apply_enabled()
            if shrink_needs_unmount:
                b.wait_in_text("#dialog", "Proceeding will unmount all filesystems on it.")
            self.dialog_set_val("size", 200)
            if need_passphrase:
                self.dialog_set_val("passphrase", "vainu-reku-toma-rolle-kaja")
            self.dialog_apply()
            self.dialog_wait_close()
            # HACK - https://github.com/storaged-project/udisks/pull/631
            m.execute("udevadm trigger")
            self.content_tab_wait_in_info(1, 1, "Size", "200 MiB")
            if shrink_needs_unmount:
                self.content_head_action(fsys_row, "Mount")
                self.confirm()
                self.wait_mounted(fsys_row, fsys_tab)
            size = int(m.execute("df -k --output=size /run/foo | tail -1").strip())
            assert (size < 300000)
        else:
            self.wait_content_tab_action_disabled(1, 1, "Shrink")

    def testResizeExt4(self):
        self.checkResize("ext4", False,
                         can_shrink=True, shrink_needs_unmount=True,
                         can_grow=True, grow_needs_unmount=False)

    def testResizeXfs(self):
        self.checkResize("xfs", False,
                         can_shrink=False,
                         can_grow=True, grow_needs_unmount=False)

    @skipImage("No NTFS support installed", "rhel-8-3", "rhel-8-3-distropkg", "rhel-8-4", "rhel-8-4-distropkg", "centos-8-stream")
    def testResizeNtfs(self):
        self.checkResize("ntfs", None,
                         can_shrink=True, shrink_needs_unmount=True,
                         can_grow=True, grow_needs_unmount=True)

    def testResizeLuks(self):
        self.checkResize("ext4", True,
                         can_shrink=True, shrink_needs_unmount=True,
                         can_grow=True, grow_needs_unmount=False,
                         need_passphrase=(self.machine.image in ["rhel-8-3", "rhel-8-3-distropkg", "rhel-8-4", "rhel-8-4-distropkg", "centos-8-stream"]))

    def wait_not_present_with_udev_trigger(self, selector):
        # This is fundamentally the same as Browser.wait, but uses a
        # longer delay between checks to avoid spamming the machine
        # with udev triggers, which would bring it to its knees.  (And
        # a waiting loop is simple eough to repeat the code here.)
        #
        m = self.machine
        b = self.browser
        for _ in range(int(b.cdp.timeout / 2)):
            if not b.is_present(selector):
                return
            # HACK - https://github.com/storaged-project/udisks/pull/631
            m.execute("udevadm trigger --subsystem-match=block")
            time.sleep(5)
        raise Error('element did not disappear')

    def shrink_extfs(self, fs_dev, size):
        # fsadm can automatically unmount and check the fs when doing
        # a resize, but in that case it will try to remount it
        # afterwards.  This remounting will mostly fail because
        # UDisks2 has removed the mount point directory in the mean
        # time.  But sometimes it will succeed.  So we take control
        # and unmount the fs explicitly.  But then we also need to
        # check it explicitly.
        #
        self.machine.execute("umount '%s' && fsadm -y check '%s' && fsadm -y resize '%s' '%s'" % (fs_dev, fs_dev, fs_dev, size))

    def testGrowShrinkHelp(self):
        m = self.machine
        b = self.browser

        if self.storaged_version < [2, 7, 6]:
            # No Filesystem.Size property
            raise unittest.SkipTest("UDisks2 too old")

        self.login_and_go("/storage")
        m.add_disk("500M", serial="DISK1")
        b.wait_in_text("#drives", "DISK1")

        m.execute("vgcreate TEST /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_DISK1")
        m.execute("lvcreate TEST -n vol -L 200m")
        b.wait_in_text("#devices", "TEST")
        b.click('#devices tr:contains("TEST")')
        b.wait_visible("#storage-detail")
        self.content_row_wait_in_col(1, 2, "/dev/TEST/vol")

        mountpoint = "/run/foo"
        self.content_head_action(1, "Format")
        self.dialog_wait_open()
        self.dialog_set_val("name", "FSYS")
        self.dialog_set_val("type", "ext4")
        self.dialog_set_val("mount_point", mountpoint)
        self.dialog_apply()
        self.dialog_wait_close()
        self.content_tab_wait_in_info(1, 2, "Name", "FSYS")
        self.content_tab_wait_in_info(1, 2, "Mount point", mountpoint)

        vol_tab = self.content_tab_expand(1, 1)

        # Grow the logical volume and let Cockpit grow the filesystem

        m.execute("lvresize TEST/vol -L+100M")
        b.wait_visible(vol_tab + " button:contains(Grow content)")
        self.content_tab_action(1, 1, "Grow content")
        self.wait_not_present_with_udev_trigger(vol_tab + " button:contains(Grow content)")
        size = int(m.execute("df -k --output=size %s | tail -1" % mountpoint).strip())
        self.assertGreater(size, 250000)

        # Shrink the filesystem and let Cockpit shrink the logical volume

        fs_dev = m.execute("lsblk -pnl /dev/TEST/vol -o NAME | tail -1").strip()
        self.shrink_extfs(fs_dev, "200M")

        self.content_head_action(1, "Mount")
        self.confirm()
        self.wait_mounted(1, 2)
        self.content_tab_action(1, 1, "Shrink volume")
        self.wait_not_present_with_udev_trigger(vol_tab + " button:contains(Shrink volume)")
        size = int(m.execute("lvs TEST/vol -o lv_size --noheading --units b --nosuffix"))
        self.assertLess(size, 250000000)

    def testGrowShrinkEncryptedHelp(self):
        m = self.machine
        b = self.browser

        if self.storaged_version < [2, 8, 0]:
            # No Encrypted.MetadataSize property
            raise unittest.SkipTest("UDisks2 too old")

        self.login_and_go("/storage")
        m.add_disk("500M", serial="DISK1")
        b.wait_in_text("#drives", "DISK1")

        m.execute("vgcreate TEST /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_DISK1")
        m.execute("lvcreate TEST -n vol -L 200m")
        b.wait_in_text("#devices", "TEST")
        b.click('#devices tr:contains("TEST")')
        b.wait_visible("#storage-detail")
        self.content_row_wait_in_col(1, 2, "/dev/TEST/vol")

        mountpoint = "/run/foo"
        self.content_head_action(1, "Format")
        self.dialog_wait_open()
        self.dialog_set_val("name", "FSYS")
        self.dialog_set_val("type", "ext4")
        self.dialog_set_val("crypto.on", True)
        self.dialog_set_val("passphrase", "vainu-reku-toma-rolle-kaja")
        self.dialog_set_val("passphrase2", "vainu-reku-toma-rolle-kaja")
        self.dialog_set_val("mount_point", mountpoint)
        self.dialog_apply()
        self.dialog_wait_close()
        self.content_tab_wait_in_info(2, 1, "Name", "FSYS")
        self.content_tab_wait_in_info(2, 1, "Mount point", mountpoint)

        vol_tab = self.content_tab_expand(1, 1)

        # Grow the logical volume and let Cockpit grow the LUKS container and the filesystem

        m.execute("lvresize TEST/vol -L+100M")

        def confirm_with_passphrase():
            if m.image not in ["rhel-8-3", "rhel-8-3-distropkg", "rhel-8-4", "rhel-8-4-distropkg", "centos-8-stream"]:
                return
            self.dialog_wait_open()
            self.dialog_wait_apply_enabled()
            self.dialog_set_val("passphrase", "vainu-reku-toma-rolle-kaja")
            self.dialog_apply()
            self.dialog_wait_close()

        b.wait_visible(vol_tab + " button:contains(Grow content)")
        self.content_tab_action(1, 1, "Grow content")
        confirm_with_passphrase()
        self.wait_not_present_with_udev_trigger(vol_tab + " button:contains(Grow content)")
        size = int(m.execute("df -k --output=size %s | tail -1" % mountpoint).strip())
        self.assertGreater(size, 250000)

        # Shrink the filesystem and let Cockpit shrink the LUKS container and logical volume

        fs_dev = m.execute("lsblk -pnl /dev/TEST/vol -o NAME | tail -1").strip()
        self.shrink_extfs(fs_dev, "200M")
        self.content_head_action(2, "Mount")
        self.confirm()
        self.wait_mounted(2, 1)

        b.wait_visible(vol_tab + " button:contains(Shrink volume)")
        self.content_tab_action(1, 1, "Shrink volume")
        confirm_with_passphrase()
        self.wait_not_present_with_udev_trigger(vol_tab + " button:contains(Shrink volume)")
        size = int(m.execute("lvs TEST/vol -o lv_size --noheading --units b --nosuffix"))
        self.assertLess(size, 250000000)

        # Grow the logical volume and the LUKS container and let Cockpit grow the filesystem

        m.execute("lvresize TEST/vol -L+100M")
        m.execute("echo vainu-reku-toma-rolle-kaja | cryptsetup resize %s" % fs_dev)

        b.wait_visible(vol_tab + " button:contains(Grow content)")
        self.content_tab_action(1, 1, "Grow content")
        confirm_with_passphrase()
        self.wait_not_present_with_udev_trigger(vol_tab + " button:contains(Grow content)")
        size = int(m.execute("df -k --output=size %s | tail -1" % mountpoint).strip())
        self.assertGreater(size, 250000)

        # Shrink the filesystem and the LUKS container and let Cockpit shrink the logical volume

        self.shrink_extfs(fs_dev, "198M")
        m.execute("echo vainu-reku-toma-rolle-kaja | cryptsetup resize '%s' 200M" % fs_dev)
        self.content_head_action(2, "Mount")
        self.confirm()
        self.wait_mounted(2, 1)

        b.wait_visible(vol_tab + " button:contains(Shrink volume)")
        self.content_tab_action(1, 1, "Shrink volume")
        confirm_with_passphrase()
        self.wait_not_present_with_udev_trigger(vol_tab + " button:contains(Shrink volume)")
        size = int(m.execute("lvs TEST/vol -o lv_size --noheading --units b --nosuffix"))
        self.assertLess(size, 250000000)

if __name__ == '__main__':
    test_main()
