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python-blivet/0020-Add-support-for-NPIV-enabled-zFCP-devices.patch

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From a03be3924318788e42bcdb3ed6a5334aed771c43 Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Thu, 28 Oct 2021 21:17:25 +0200
Subject: [PATCH 1/8] Fix removing zFCP SCSI devices
Values parsed from /proc/scsi/scsi were not correctly used to assemble
paths to SCSI devices.
For example:
/sys/bus/scsi/devices/0:0:00:00/
was incorrectly accessed instead of:
/sys/bus/scsi/devices/0:0:0:0/
Switch to a more reliable way of listing the available SCSI devices.
---
blivet/zfcp.py | 17 ++++-------------
1 file changed, 4 insertions(+), 13 deletions(-)
diff --git a/blivet/zfcp.py b/blivet/zfcp.py
index 93af5419..3747290e 100644
--- a/blivet/zfcp.py
+++ b/blivet/zfcp.py
@@ -20,6 +20,7 @@
#
import os
+import re
from . import udev
from . import util
from .i18n import _
@@ -167,20 +168,10 @@ class ZFCPDevice:
return True
def offline_scsi_device(self):
- f = open("/proc/scsi/scsi", "r")
- lines = f.readlines()
- f.close()
- # alternatively iterate over /sys/bus/scsi/devices/*:0:*:*/
+ # A list of existing SCSI devices in format Host:Bus:Target:Lun
+ scsi_devices = [f for f in os.listdir(scsidevsysfs) if re.search(r'^[0-9]+:[0-9]+:[0-9]+:[0-9]+$', f)]
- for line in lines:
- if not line.startswith("Host"):
- continue
- scsihost = line.split()
- host = scsihost[1]
- channel = "0"
- devid = scsihost[5]
- lun = scsihost[7]
- scsidev = "%s:%s:%s:%s" % (host[4:], channel, devid, lun)
+ for scsidev in scsi_devices:
fcpsysfs = "%s/%s" % (scsidevsysfs, scsidev)
scsidel = "%s/%s/delete" % (scsidevsysfs, scsidev)
--
2.36.1
From 82bd018fdc47c64f30d8422eb90bc76564072a26 Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sun, 21 Nov 2021 02:47:45 +0100
Subject: [PATCH 2/8] Refactor the ZFCPDevice class
Add a new base class for zFCP devices.
Move code to the new base class.
Improve documentation.
---
blivet/zfcp.py | 131 +++++++++++++++++++++++++++++++++++--------------
1 file changed, 95 insertions(+), 36 deletions(-)
diff --git a/blivet/zfcp.py b/blivet/zfcp.py
index 3747290e..4a50f65f 100644
--- a/blivet/zfcp.py
+++ b/blivet/zfcp.py
@@ -21,6 +21,7 @@
import os
import re
+from abc import ABC
from . import udev
from . import util
from .i18n import _
@@ -46,29 +47,19 @@ zfcpsysfs = "/sys/bus/ccw/drivers/zfcp"
scsidevsysfs = "/sys/bus/scsi/devices"
zfcpconf = "/etc/zfcp.conf"
+class ZFCPDeviceBase(ABC):
+ """An abstract base class for zFCP storage devices."""
-class ZFCPDevice:
- """
- .. warning::
- Since this is a singleton class, calling deepcopy() on the instance
- just returns ``self`` with no copy being created.
- """
-
- def __init__(self, devnum, wwpn, fcplun):
+ def __init__(self, devnum):
self.devnum = blockdev.s390.sanitize_dev_input(devnum)
- self.wwpn = blockdev.s390.zfcp_sanitize_wwpn_input(wwpn)
- self.fcplun = blockdev.s390.zfcp_sanitize_lun_input(fcplun)
-
if not self.devnum:
raise ValueError(_("You have not specified a device number or the number is invalid"))
- if not self.wwpn:
- raise ValueError(_("You have not specified a worldwide port name or the name is invalid."))
- if not self.fcplun:
- raise ValueError(_("You have not specified a FCP LUN or the number is invalid."))
+
+ self._device_online_path = os.path.join(zfcpsysfs, self.devnum, "online")
# Force str and unicode types in case any of the properties are unicode
def _to_string(self):
- return "%s %s %s" % (self.devnum, self.wwpn, self.fcplun)
+ return str(self.devnum)
def __str__(self):
return stringize(self._to_string())
@@ -76,33 +67,97 @@ class ZFCPDevice:
def __unicode__(self):
return unicodeize(self._to_string())
- def online_device(self):
- online = "%s/%s/online" % (zfcpsysfs, self.devnum)
- portadd = "%s/%s/port_add" % (zfcpsysfs, self.devnum)
- portdir = "%s/%s/%s" % (zfcpsysfs, self.devnum, self.wwpn)
- unitadd = "%s/unit_add" % (portdir)
- unitdir = "%s/%s" % (portdir, self.fcplun)
- failed = "%s/failed" % (unitdir)
+ def _free_device(self):
+ """Remove the device from the I/O ignore list to make it visible to the system.
+
+ :raises: ValueError if the device cannot be removed from the I/O ignore list
+ """
- if not os.path.exists(online):
+ if not os.path.exists(self._device_online_path):
log.info("Freeing zFCP device %s", self.devnum)
util.run_program(["zfcp_cio_free", "-d", self.devnum])
- if not os.path.exists(online):
+ if not os.path.exists(self._device_online_path):
raise ValueError(_("zFCP device %s not found, not even in device ignore list.") %
(self.devnum,))
+ def _set_zfcp_device_online(self):
+ """Set the zFCP device online.
+
+ :raises: ValueError if the device cannot be set online
+ """
+
try:
- f = open(online, "r")
- devonline = f.readline().strip()
- f.close()
+ with open(self._device_online_path) as f:
+ devonline = f.readline().strip()
if devonline != "1":
- logged_write_line_to_file(online, "1")
+ logged_write_line_to_file(self._device_online_path, "1")
except OSError as e:
raise ValueError(_("Could not set zFCP device %(devnum)s "
"online (%(e)s).")
% {'devnum': self.devnum, 'e': e})
+ def _set_zfcp_device_offline(self):
+ """Set the zFCP device offline.
+
+ :raises: ValueError if the device cannot be set offline
+ """
+
+ try:
+ logged_write_line_to_file(self._device_online_path, "0")
+ except OSError as e:
+ raise ValueError(_("Could not set zFCP device %(devnum)s "
+ "offline (%(e)s).")
+ % {'devnum': self.devnum, 'e': e})
+
+ def online_device(self):
+ """Initialize the device and make its storage block device(s) ready to use.
+
+ :returns: True if success
+ :raises: ValueError if the device cannot be initialized
+ """
+
+ self._free_device()
+ self._set_zfcp_device_online()
+ return True
+
+
+class ZFCPDevice(ZFCPDeviceBase):
+ """A class for zFCP devices that are not configured in NPIV mode. Such
+ devices have to be specified by a device number, WWPN and LUN.
+ """
+
+ def __init__(self, devnum, wwpn, fcplun):
+ super().__init__(devnum)
+
+ self.wwpn = blockdev.s390.zfcp_sanitize_wwpn_input(wwpn)
+ if not self.wwpn:
+ raise ValueError(_("You have not specified a worldwide port name or the name is invalid."))
+
+ self.fcplun = blockdev.s390.zfcp_sanitize_lun_input(fcplun)
+ if not self.fcplun:
+ raise ValueError(_("You have not specified a FCP LUN or the number is invalid."))
+
+ # Force str and unicode types in case any of the properties are unicode
+ def _to_string(self):
+ return "{} {} {}".format(self.devnum, self.wwpn, self.fcplun)
+
+ def online_device(self):
+ """Initialize the device and make its storage block device(s) ready to use.
+
+ :returns: True if success
+ :raises: ValueError if the device cannot be initialized
+ """
+
+ super().online_device()
+
+ portadd = "%s/%s/port_add" % (zfcpsysfs, self.devnum)
+ portdir = "%s/%s/%s" % (zfcpsysfs, self.devnum, self.wwpn)
+ unitadd = "%s/unit_add" % (portdir)
+ unitdir = "%s/%s" % (portdir, self.fcplun)
+ failed = "%s/failed" % (unitdir)
+
+ # create the sysfs directory for the WWPN/port
if not os.path.exists(portdir):
if os.path.exists(portadd):
# older zfcp sysfs interface
@@ -127,6 +182,7 @@ class ZFCPDevice:
"there.", {'wwpn': self.wwpn,
'devnum': self.devnum})
+ # create the sysfs directory for the LUN/unit
if not os.path.exists(unitdir):
try:
logged_write_line_to_file(unitadd, self.fcplun)
@@ -144,6 +200,7 @@ class ZFCPDevice:
'wwpn': self.wwpn,
'devnum': self.devnum})
+ # check the state of the LUN
fail = "0"
try:
f = open(failed, "r")
@@ -168,6 +225,8 @@ class ZFCPDevice:
return True
def offline_scsi_device(self):
+ """Find SCSI devices associated to the zFCP device and remove them from the system."""
+
# A list of existing SCSI devices in format Host:Bus:Target:Lun
scsi_devices = [f for f in os.listdir(scsidevsysfs) if re.search(r'^[0-9]+:[0-9]+:[0-9]+:[0-9]+$', f)]
@@ -196,7 +255,8 @@ class ZFCPDevice:
self.devnum, self.wwpn, self.fcplun)
def offline_device(self):
- offline = "%s/%s/online" % (zfcpsysfs, self.devnum)
+ """Remove the zFCP device from the system."""
+
portadd = "%s/%s/port_add" % (zfcpsysfs, self.devnum)
portremove = "%s/%s/port_remove" % (zfcpsysfs, self.devnum)
unitremove = "%s/%s/%s/unit_remove" % (zfcpsysfs, self.devnum, self.wwpn)
@@ -212,6 +272,7 @@ class ZFCPDevice:
% {'devnum': self.devnum, 'wwpn': self.wwpn,
'fcplun': self.fcplun, 'e': e})
+ # remove the LUN
try:
logged_write_line_to_file(unitremove, self.fcplun)
except OSError as e:
@@ -221,6 +282,7 @@ class ZFCPDevice:
% {'fcplun': self.fcplun, 'wwpn': self.wwpn,
'devnum': self.devnum, 'e': e})
+ # remove the WWPN only if there are no other LUNs attached
if os.path.exists(portadd):
# only try to remove ports with older zfcp sysfs interface
for lun in os.listdir(portdir):
@@ -238,6 +300,7 @@ class ZFCPDevice:
% {'wwpn': self.wwpn,
'devnum': self.devnum, 'e': e})
+ # check if there are other WWPNs existing for the zFCP device number
if os.path.exists(portadd):
# older zfcp sysfs interface
for port in os.listdir(devdir):
@@ -256,12 +319,8 @@ class ZFCPDevice:
self.devnum, luns[0])
return True
- try:
- logged_write_line_to_file(offline, "0")
- except OSError as e:
- raise ValueError(_("Could not set zFCP device %(devnum)s "
- "offline (%(e)s).")
- % {'devnum': self.devnum, 'e': e})
+ # no other WWPNs/LUNs exists for this device number, it's safe to bring it offline
+ self._set_zfcp_device_offline()
return True
--
2.36.1
From a9b9fe124dbc23104c0b60c8e0326cab3eb7a28d Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sun, 21 Nov 2021 02:35:05 +0100
Subject: [PATCH 3/8] Move offline_scsi_device() to the base class
---
blivet/zfcp.py | 74 ++++++++++++++++++++++++++++++--------------------
1 file changed, 44 insertions(+), 30 deletions(-)
diff --git a/blivet/zfcp.py b/blivet/zfcp.py
index 4a50f65f..af8f841d 100644
--- a/blivet/zfcp.py
+++ b/blivet/zfcp.py
@@ -110,6 +110,15 @@ class ZFCPDeviceBase(ABC):
"offline (%(e)s).")
% {'devnum': self.devnum, 'e': e})
+ def _is_scsi_associated_with_fcp(self, fcphbasysfs, _fcpwwpnsysfs, _fcplunsysfs):
+ """Decide if the SCSI device with the provided SCSI attributes
+ corresponds to the zFCP device.
+
+ :returns: True or False
+ """
+
+ return fcphbasysfs == self.devnum
+
def online_device(self):
"""Initialize the device and make its storage block device(s) ready to use.
@@ -121,6 +130,30 @@ class ZFCPDeviceBase(ABC):
self._set_zfcp_device_online()
return True
+ def offline_scsi_device(self):
+ """Find SCSI devices associated to the zFCP device and remove them from the system."""
+
+ # A list of existing SCSI devices in format Host:Bus:Target:Lun
+ scsi_devices = [f for f in os.listdir(scsidevsysfs) if re.search(r'^[0-9]+:[0-9]+:[0-9]+:[0-9]+$', f)]
+
+ for scsidev in scsi_devices:
+ fcpsysfs = os.path.join(scsidevsysfs, scsidev)
+
+ with open(os.path.join(fcpsysfs, "hba_id")) as f:
+ fcphbasysfs = f.readline().strip()
+ with open(os.path.join(fcpsysfs, "wwpn")) as f:
+ fcpwwpnsysfs = f.readline().strip()
+ with open(os.path.join(fcpsysfs, "fcp_lun")) as f:
+ fcplunsysfs = f.readline().strip()
+
+ if self._is_scsi_associated_with_fcp(fcphbasysfs, fcpwwpnsysfs, fcplunsysfs):
+ scsidel = os.path.join(scsidevsysfs, scsidev, "delete")
+ logged_write_line_to_file(scsidel, "1")
+ udev.settle()
+ return
+
+ log.warning("No scsi device found to delete for zfcp %s", self)
+
class ZFCPDevice(ZFCPDeviceBase):
"""A class for zFCP devices that are not configured in NPIV mode. Such
@@ -142,6 +175,17 @@ class ZFCPDevice(ZFCPDeviceBase):
def _to_string(self):
return "{} {} {}".format(self.devnum, self.wwpn, self.fcplun)
+ def _is_scsi_associated_with_fcp(self, fcphbasysfs, fcpwwpnsysfs, fcplunsysfs):
+ """Decide if the SCSI device with the provided SCSI attributes
+ corresponds to the zFCP device.
+
+ :returns: True or False
+ """
+
+ return (fcphbasysfs == self.devnum and
+ fcpwwpnsysfs == self.wwpn and
+ fcplunsysfs == self.fcplun)
+
def online_device(self):
"""Initialize the device and make its storage block device(s) ready to use.
@@ -224,36 +268,6 @@ class ZFCPDevice(ZFCPDeviceBase):
return True
- def offline_scsi_device(self):
- """Find SCSI devices associated to the zFCP device and remove them from the system."""
-
- # A list of existing SCSI devices in format Host:Bus:Target:Lun
- scsi_devices = [f for f in os.listdir(scsidevsysfs) if re.search(r'^[0-9]+:[0-9]+:[0-9]+:[0-9]+$', f)]
-
- for scsidev in scsi_devices:
- fcpsysfs = "%s/%s" % (scsidevsysfs, scsidev)
- scsidel = "%s/%s/delete" % (scsidevsysfs, scsidev)
-
- f = open("%s/hba_id" % (fcpsysfs), "r")
- fcphbasysfs = f.readline().strip()
- f.close()
- f = open("%s/wwpn" % (fcpsysfs), "r")
- fcpwwpnsysfs = f.readline().strip()
- f.close()
- f = open("%s/fcp_lun" % (fcpsysfs), "r")
- fcplunsysfs = f.readline().strip()
- f.close()
-
- if fcphbasysfs == self.devnum \
- and fcpwwpnsysfs == self.wwpn \
- and fcplunsysfs == self.fcplun:
- logged_write_line_to_file(scsidel, "1")
- udev.settle()
- return
-
- log.warning("no scsi device found to delete for zfcp %s %s %s",
- self.devnum, self.wwpn, self.fcplun)
-
def offline_device(self):
"""Remove the zFCP device from the system."""
--
2.36.1
From 47997255cf12505d743d6e01a40a51b23ed64a6d Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sat, 6 Nov 2021 21:27:52 +0100
Subject: [PATCH 4/8] Allow to delete more than one SCSI device
NPIV zFCP devices can attach more than one SCSI device, so allow to
delete them all. For non-NPIV devices it means possible slowdown, since
all SCSI devices would now be checked.
---
blivet/zfcp.py | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/blivet/zfcp.py b/blivet/zfcp.py
index af8f841d..3b3f623b 100644
--- a/blivet/zfcp.py
+++ b/blivet/zfcp.py
@@ -136,6 +136,7 @@ class ZFCPDeviceBase(ABC):
# A list of existing SCSI devices in format Host:Bus:Target:Lun
scsi_devices = [f for f in os.listdir(scsidevsysfs) if re.search(r'^[0-9]+:[0-9]+:[0-9]+:[0-9]+$', f)]
+ scsi_device_found = False
for scsidev in scsi_devices:
fcpsysfs = os.path.join(scsidevsysfs, scsidev)
@@ -147,12 +148,13 @@ class ZFCPDeviceBase(ABC):
fcplunsysfs = f.readline().strip()
if self._is_scsi_associated_with_fcp(fcphbasysfs, fcpwwpnsysfs, fcplunsysfs):
+ scsi_device_found = True
scsidel = os.path.join(scsidevsysfs, scsidev, "delete")
logged_write_line_to_file(scsidel, "1")
udev.settle()
- return
- log.warning("No scsi device found to delete for zfcp %s", self)
+ if not scsi_device_found:
+ log.warning("No scsi device found to delete for zfcp %s", self)
class ZFCPDevice(ZFCPDeviceBase):
--
2.36.1
From feace41093c97dc88aa20b07a5ff6049df4bd01d Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sun, 21 Nov 2021 03:01:02 +0100
Subject: [PATCH 5/8] Add a function for reading the value of a kernel module
parameter
---
blivet/util.py | 33 +++++++++++++++++++++++++++++++++
tests/util_test.py | 11 +++++++++++
2 files changed, 44 insertions(+)
diff --git a/blivet/util.py b/blivet/util.py
index af60210b..cbef65e0 100644
--- a/blivet/util.py
+++ b/blivet/util.py
@@ -1131,3 +1131,36 @@ def detect_virt():
return False
else:
return vm[0] in ('qemu', 'kvm', 'xen')
+
+
+def natural_sort_key(device):
+ """ Sorting key for devices which makes sure partitions are sorted in natural
+ way, e.g. 'sda1, sda2, ..., sda10' and not like 'sda1, sda10, sda2, ...'
+ """
+ if device.type == "partition" and device.parted_partition and device.disk:
+ part_num = getattr(device.parted_partition, "number", -1)
+ return [device.disk.name, part_num]
+ else:
+ return [device.name, 0]
+
+
+def get_kernel_module_parameter(module, parameter):
+ """ Return the value of a given kernel module parameter
+
+ :param str module: a kernel module
+ :param str parameter: a module parameter
+ :returns: the value of the given kernel module parameter or None
+ :rtype: str
+ """
+
+ value = None
+
+ parameter_path = os.path.join("/sys/module", module, "parameters", parameter)
+ try:
+ with open(parameter_path) as f:
+ value = f.read().strip()
+ except IOError as e:
+ log.warning("Couldn't get the value of the parameter '%s' from the kernel module '%s': %s",
+ parameter, module, str(e))
+
+ return value
diff --git a/tests/util_test.py b/tests/util_test.py
index 853b6166..ed2549ad 100644
--- a/tests/util_test.py
+++ b/tests/util_test.py
@@ -180,3 +180,14 @@ class GetSysfsAttrTestCase(unittest.TestCase):
# the unicode replacement character (U+FFFD) should be used instead
model = util.get_sysfs_attr(sysfs, "model")
self.assertEqual(model, "test model\ufffd")
+
+
+class GetKernelModuleParameterTestCase(unittest.TestCase):
+
+ def test_nonexisting_kernel_module(self):
+ self.assertIsNone(util.get_kernel_module_parameter("unknown_module", "unknown_parameter"))
+
+ def test_get_kernel_module_parameter_value(self):
+ with mock.patch('blivet.util.open', mock.mock_open(read_data='value\n')):
+ value = util.get_kernel_module_parameter("module", "parameter")
+ self.assertEqual(value, "value")
--
2.36.1
From cea53c0f95793d8041391dd8e1edc58aa0f7868c Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sun, 21 Nov 2021 03:01:46 +0100
Subject: [PATCH 6/8] LUN and WWPN should not be used for NPIV zFCP devices
Log a warning if activating a zFCP device in NPIV mode and WWPN or
LUN have been provided. They are superfluous for NPIV devices.
---
blivet/zfcp.py | 58 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/blivet/zfcp.py b/blivet/zfcp.py
index 3b3f623b..726e9364 100644
--- a/blivet/zfcp.py
+++ b/blivet/zfcp.py
@@ -22,6 +22,7 @@
import os
import re
from abc import ABC
+import glob
from . import udev
from . import util
from .i18n import _
@@ -47,6 +48,55 @@ zfcpsysfs = "/sys/bus/ccw/drivers/zfcp"
scsidevsysfs = "/sys/bus/scsi/devices"
zfcpconf = "/etc/zfcp.conf"
+
+def _is_lun_scan_allowed():
+ """Return True if automatic LUN scanning is enabled by the kernel."""
+
+ allow_lun_scan = util.get_kernel_module_parameter("zfcp", "allow_lun_scan")
+ return allow_lun_scan == "Y"
+
+
+def _is_port_in_npiv_mode(device_id):
+ """Return True if the device ID is configured in NPIV mode. See
+ https://www.ibm.com/docs/en/linux-on-systems?topic=devices-use-npiv
+ """
+
+ port_in_npiv_mode = False
+ port_type_path = "/sys/bus/ccw/devices/{}/host*/fc_host/host*/port_type".format(device_id)
+ port_type_paths = glob.glob(port_type_path)
+ try:
+ for filename in port_type_paths:
+ with open(filename) as f:
+ port_type = f.read()
+ if re.search(r"(^|\s)NPIV(\s|$)", port_type):
+ port_in_npiv_mode = True
+ except OSError as e:
+ log.warning("Couldn't read the port_type attribute of the %s device: %s", device_id, str(e))
+ port_in_npiv_mode = False
+
+ return port_in_npiv_mode
+
+
+def is_npiv_enabled(device_id):
+ """Return True if the given zFCP device ID is configured and usable in
+ NPIV (N_Port ID Virtualization) mode.
+
+ :returns: True or False
+ """
+
+ # LUN scanning disabled by the kernel module prevents using the device in NPIV mode
+ if not _is_lun_scan_allowed():
+ log.warning("Automatic LUN scanning is disabled by the zfcp kernel module.")
+ return False
+
+ # The port itself has to be configured in NPIV mode
+ if not _is_port_in_npiv_mode(device_id):
+ log.warning("The zFCP device %s is not configured in NPIV mode.", device_id)
+ return False
+
+ return True
+
+
class ZFCPDeviceBase(ABC):
"""An abstract base class for zFCP storage devices."""
@@ -203,6 +253,13 @@ class ZFCPDevice(ZFCPDeviceBase):
unitdir = "%s/%s" % (portdir, self.fcplun)
failed = "%s/failed" % (unitdir)
+ # Activating an NPIV enabled device using devnum, WWPN and LUN should still be possible
+ # as this method was used as a workaround until the support for NPIV enabled devices has
+ # been implemented. Just log a warning message and continue.
+ if is_npiv_enabled(self.devnum):
+ log.warning("zFCP device %s in NPIV mode brought online. All LUNs will be activated "
+ "automatically although WWPN and LUN have been provided.", self.devnum)
+
# create the sysfs directory for the WWPN/port
if not os.path.exists(portdir):
if os.path.exists(portadd):
@@ -327,7 +384,6 @@ class ZFCPDevice(ZFCPDeviceBase):
return True
else:
# newer zfcp sysfs interface with auto port scan
- import glob
luns = glob.glob("%s/0x????????????????/0x????????????????"
% (devdir,))
if len(luns) != 0:
--
2.36.1
From ff01832941a62fc3113983a51a22369566b3f900 Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sat, 6 Nov 2021 21:27:52 +0100
Subject: [PATCH 7/8] Add new class for NPIV-enabled devices
---
blivet/zfcp.py | 53 +++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 50 insertions(+), 3 deletions(-)
diff --git a/blivet/zfcp.py b/blivet/zfcp.py
index 726e9364..e6c0e48a 100644
--- a/blivet/zfcp.py
+++ b/blivet/zfcp.py
@@ -397,6 +397,44 @@ class ZFCPDevice(ZFCPDeviceBase):
return True
+class ZFCPNPIVDevice(ZFCPDeviceBase):
+ """Class for zFCP devices configured in NPIV mode. Only a zFCP device number is
+ needed for such devices.
+ """
+
+ def online_device(self):
+ """Initialize the device and make its storage block device(s) ready to use.
+
+ :returns: True if success
+ :raises: ValueError if the device cannot be initialized
+ """
+
+ super().online_device()
+
+ if not is_npiv_enabled(self.devnum):
+ raise ValueError(_("zFCP device %s cannot be used in NPIV mode.") % self)
+
+ return True
+
+ def offline_device(self):
+ """Remove the zFCP device from the system.
+
+ :returns: True if success
+ :raises: ValueError if the device cannot be brought offline
+ """
+
+ try:
+ self.offline_scsi_device()
+ except OSError as e:
+ raise ValueError(_("Could not correctly delete SCSI device of "
+ "zFCP %(zfcpdev)s (%(e)s).")
+ % {'zfcpdev': self, 'e': e})
+
+ self._set_zfcp_device_offline()
+
+ return True
+
+
class zFCP:
""" ZFCP utility class.
@@ -439,7 +477,12 @@ class zFCP:
fields = line.split()
- if len(fields) == 3:
+ # NPIV enabled device
+ if len(fields) == 1:
+ devnum = fields[0]
+ wwpn = None
+ fcplun = None
+ elif len(fields) == 3:
devnum = fields[0]
wwpn = fields[1]
fcplun = fields[2]
@@ -458,8 +501,12 @@ class zFCP:
except ValueError as e:
log.warning("%s", str(e))
- def add_fcp(self, devnum, wwpn, fcplun):
- d = ZFCPDevice(devnum, wwpn, fcplun)
+ def add_fcp(self, devnum, wwpn=None, fcplun=None):
+ if wwpn and fcplun:
+ d = ZFCPDevice(devnum, wwpn, fcplun)
+ else:
+ d = ZFCPNPIVDevice(devnum)
+
if d.online_device():
self.fcpdevs.add(d)
--
2.36.1
From ee5b0cdc2393775925fbd9d32caed16eee33fcb0 Mon Sep 17 00:00:00 2001
From: Jan Stodola <jstodola@redhat.com>
Date: Sat, 20 Nov 2021 23:12:43 +0100
Subject: [PATCH 8/8] Generate correct dracut boot arguments for NPIV devices
NPIV enabled devices need only the device ID. WWPNs/LUNs are discovered
automatically by the kernel module.
---
blivet/devices/disk.py | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/blivet/devices/disk.py b/blivet/devices/disk.py
index 67a01ba6..36278507 100644
--- a/blivet/devices/disk.py
+++ b/blivet/devices/disk.py
@@ -577,7 +577,15 @@ class ZFCPDiskDevice(DiskDevice):
'lun': self.fcp_lun}
def dracut_setup_args(self):
- return set(["rd.zfcp=%s,%s,%s" % (self.hba_id, self.wwpn, self.fcp_lun,)])
+ from ..zfcp import is_npiv_enabled
+
+ # zFCP devices in NPIV mode need only the device ID
+ if is_npiv_enabled(self.hba_id):
+ dracut_args = set(["rd.zfcp=%s" % self.hba_id])
+ else:
+ dracut_args = set(["rd.zfcp=%s,%s,%s" % (self.hba_id, self.wwpn, self.fcp_lun,)])
+
+ return dracut_args
class DASDDevice(DiskDevice):
--
2.36.1
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