- improve lvm error handling

1 files changed, 101 insertions, 0 deletions

diff --git a/lvmErrors.py b/lvmErrors.py
new file mode 100644
index 000000000..3371c05a4
--- /dev/null
+++ b/lvmErrors.py
@@ -0,0 +1,101 @@
+#
+# lvmErrors.py: lvm error exceptions
+#
+# Peter Jones <pjones@redhat.com>
+#
+# Copyright 2007 Red Hat, Inc.
+#
+# This software may be freely redistributed under the terms of the GNU
+# library public license.
+#
+# You should have received a copy of the GNU Library Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+"""Exceptions for use in lvm operations."""
+
+import string
+from lvm import output
+
+class LvmError(Exception):
+    """An error occurred with lvm."""
+    def __init__(self, command, name=None):
+        self.command = command
+        self.name = name
+        self.log = self.getLvmOutput()
+
+    def getLvmOutput(self):
+        f = open(output, "r")
+        lines = reduce(lambda x,y: x + [string.strip(y),], f.readlines(), [])
+        lines = string.join(reduce(lambda x,y: x + ["   %s" % (y,)], \
+                                    lines, []), "\n")
+        return lines
+
+    def __str__(self):
+        s = ""
+        if not self.name is None:
+            s = " for device %s" % (self.name,)
+        return "%s failed%s\nLog:\n%s" % (self.command, s, self.log)
+
+class LVCreateError(LvmError):
+    def __init__(self, vgname, lvname, size):
+        self.vgname = vgname
+        self.lvname = lvname
+        self.size = size
+        self.log = self.getLvmOutput()
+
+    def __str__(self):
+        return "lvcreate of %d Megabyte lv \"%s\" on vg \"%s\" failed\n" \
+               "Log:\n%s" % ( \
+            self.size, self.lvname, self.vgname, self.log)
+
+class LVRemoveError(LvmError):
+    def __init__(self, vgname, lvname):
+        self.vgname = vgname
+        self.lvname = lvname
+        self.log = self.getLvmOutput()
+
+    def __str__(self):
+        return "lvremove of lv \"%s\" from vg \"%s\" failed\nLog:\n%s" % ( \
+            self.lvname, self.vgname, self.log)
+
+class VGCreateError(LvmError):
+    def __init__(self, vgname, PESize, nodes):
+        self.vgname = vgname
+        self.PESize = PESize
+        self.nodes = nodes
+        self.log = self.getLvmOutput()
+
+    def __str__(self):
+        nodes = string.join(self.nodes, ' ')
+        return "vgcreate failed creating vg \"%s\" (PESize=%dkB) on PVs: %s\n" \
+               "Log:\n%s" % ( \
+            self.vgname, self.PESize, nodes, self.log)
+
+class VGRemoveError(LvmError):
+    def __init__(self, vgname):
+        self.vgname = vgname
+        self.log = self.getLvmOutput()
+
+    def __str__(self):
+        return "vgremove of vg \"%s\" failed\nLog:\n%s" % ( \
+            self.vgname, self.log)
+
+class PVRemoveError(LvmError):
+    def __init__(self, pvname):
+        self.pvname = pvname
+        self.log = self.getLvmOutput()
+
+    def __str__(self):
+        return "pvremove of pv \"%s\" failed\nLog:\n%s" % ( \
+            self.pvname, self.log)
+
+class PVCreateError(LvmError):
+    def __init__(self, pvname):
+        self.pvname = pvname
+        self.log = self.getLvmOutput()
+
+    def __str__(self):
+        return "pvcreate of pv \"%s\" failed\nLog:\n%s" % ( \
+            self.pvname, self.log)
+