[node-patches] Change in ovirt-node[master]: Add system.Filesystem.by_partlabel

[rbarry at redhat.com]

Ryan Barry has uploaded a new change for review.

Change subject: Add system.Filesystem.by_partlabel
......................................................................

Add system.Filesystem.by_partlabel

UEFI+iSCSI booting requires finding a partition by partlabel
instead of label in order to find the grub config. Add a
convenience method.

Change-Id: I531adfce70f1a0f4977d454d8447315f2e2bea46
Signed-off-by: Ryan Barry <rbarry at redhat.com>
---
M src/ovirt/node/utils/system.py
1 file changed, 20 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.ovirt.org:29418/ovirt-node refs/changes/12/34912/1

diff --git a/src/ovirt/node/utils/system.py b/src/ovirt/node/utils/system.py
index 0d6a11d..6622a5b 100644
--- a/src/ovirt/node/utils/system.py
+++ b/src/ovirt/node/utils/system.py
@@ -838,6 +838,26 @@
             LOGGER.debug("Failed to resolve disks: %s" % e.cmd, exc_info=True)
         return fs
 
+    @staticmethod
+    def by_partlabel(partlabel):
+        """Determines whether a filesystem with a given partlabel is present on
+        this system
+        """
+        fs = None
+        try:
+            Filesystem._flush()
+            with open(os.devnull, 'wb') as DEVNULL:
+                device = process.check_output(["blkid", "-c", "/dev/null",
+                                               "-l", "-t",
+                                               "PARTLABEL=%s" % label],
+                                              stderr=DEVNULL).strip()
+
+            fs = Filesystem(device)
+
+        except process.CalledProcessError as e:
+            LOGGER.debug("Failed to resolve disks: %s" % e.cmd, exc_info=True)
+        return fs
+
     def _tokens(self):
         tokens = process.check_output(["blkid", "-o", "export", self.device])
         return parse_varfile(tokens)


-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I531adfce70f1a0f4977d454d8447315f2e2bea46
Gerrit-PatchSet: 1
Gerrit-Project: ovirt-node
Gerrit-Branch: master
Gerrit-Owner: Ryan Barry <rbarry at redhat.com>