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108 lines
3.5 KiB
108 lines
3.5 KiB
From 06597099906be55b106c234b3bf0c87ec7d90a07 Mon Sep 17 00:00:00 2001
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From: Tomas Bzatek <tbzatek@redhat.com>
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Date: Thu, 17 Aug 2023 14:45:18 +0200
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Subject: [PATCH] nvme: Align HostNQN and HostID format to TP4126
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Also don't overwrite existing files during startup() since they
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might have been supplied by early boot stages.
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---
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blivet/nvme.py | 62 +++++++++++++++++++++++++++++++-------------------
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1 file changed, 39 insertions(+), 23 deletions(-)
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diff --git a/blivet/nvme.py b/blivet/nvme.py
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index 17bead15e..5ac41cffa 100644
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--- a/blivet/nvme.py
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+++ b/blivet/nvme.py
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@@ -18,16 +18,20 @@
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#
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import os
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-import shutil
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from . import errors
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-from . import util
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+
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+import gi
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+gi.require_version("BlockDev", "2.0")
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+
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+from gi.repository import BlockDev as blockdev
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import logging
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log = logging.getLogger("blivet")
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-HOSTNQN_FILE = "/etc/nvme/hostnqn"
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-HOSTID_FILE = "/etc/nvme/hostid"
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+ETC_NVME_PATH = "/etc/nvme/"
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+HOSTNQN_FILE = ETC_NVME_PATH + "hostnqn"
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+HOSTID_FILE = ETC_NVME_PATH + "hostid"
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class NVMe(object):
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@@ -40,6 +44,8 @@ class NVMe(object):
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def __init__(self):
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self.started = False
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+ self._hostnqn = None
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+ self._hostid = None
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# So that users can write nvme() to get the singleton instance
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def __call__(self):
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@@ -52,28 +58,38 @@ def startup(self):
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if self.started:
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return
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- rc, nqn = util.run_program_and_capture_output(["nvme", "gen-hostnqn"])
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- if rc != 0:
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- raise errors.NVMeError("Failed to generate hostnqn")
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-
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- with open(HOSTNQN_FILE, "w") as f:
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- f.write(nqn)
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-
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- rc, hid = util.run_program_and_capture_output(["dmidecode", "-s", "system-uuid"])
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- if rc != 0:
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- raise errors.NVMeError("Failed to generate host ID")
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-
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- with open(HOSTID_FILE, "w") as f:
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- f.write(hid)
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+ self._hostnqn = blockdev.nvme_get_host_nqn()
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+ self._hostid = blockdev.nvme_get_host_id()
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+ if not self._hostnqn:
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+ self._hostnqn = blockdev.nvme_generate_host_nqn()
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+ if not self._hostnqn:
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+ raise errors.NVMeError("Failed to generate HostNQN")
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+ if not self._hostid:
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+ if 'uuid:' not in self._hostnqn:
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+ raise errors.NVMeError("Missing UUID part in the HostNQN string '%s'" % self._hostnqn)
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+ # derive HostID from HostNQN's UUID part
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+ self._hostid = self._hostnqn.split('uuid:')[1]
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+
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+ # do not overwrite existing files, taken e.g. from initramfs
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+ self.write("/", overwrite=False)
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self.started = True
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- def write(self, root): # pylint: disable=unused-argument
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- # copy the hostnqn and hostid files
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- if not os.path.isdir(root + "/etc/nvme"):
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- os.makedirs(root + "/etc/nvme", 0o755)
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- shutil.copyfile(HOSTNQN_FILE, root + HOSTNQN_FILE)
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- shutil.copyfile(HOSTID_FILE, root + HOSTID_FILE)
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+ def write(self, root, overwrite=True): # pylint: disable=unused-argument
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+ # write down the hostnqn and hostid files
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+ p = root + ETC_NVME_PATH
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+ if not os.path.isdir(p):
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+ os.makedirs(p, 0o755)
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+ p = root + HOSTNQN_FILE
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+ if overwrite or not os.path.isfile(p):
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+ with open(p, "w") as f:
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+ f.write(self._hostnqn)
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+ f.write("\n")
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+ p = root + HOSTID_FILE
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+ if overwrite or not os.path.isfile(p):
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+ with open(p, "w") as f:
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+ f.write(self._hostid)
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+ f.write("\n")
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# Create nvme singleton
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