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Old 11-06-2009, 10:38 PM
David Cantrell
 
Default Initialize DASD totalCylinders before progress bar callback (#532420).

On s390, if you had a single DASD that needed dasdfmt run, you would get
a ZeroDivisionError traceback because the self._totalCylinders value was
zero. The problem was caused by the DASD.totalCylinders property and
how it initialized. It would initialize itself on the first call, but
since we'd already fired off a dasdfmt process for the device, the one
running to capture the cylinder count couldn't get access to the device.

Users with more than one DASD needing a dasdfmt would not see the
traceback, but would have an incorrect total cylinder count, so 100%
would be reached when n-1 devices had been formatted.

Lastly, in certain instances, the status for the DASD could be "basic"
rather than "unformatted", so treat those the same and perform a
dasdfmt.
---
storage/dasd.py | 49 +++++++++++++++++++++++--------------------------
1 files changed, 23 insertions(+), 26 deletions(-)

diff --git a/storage/dasd.py b/storage/dasd.py
index 19b8488..eebae53 100644
--- a/storage/dasd.py
+++ b/storage/dasd.py
@@ -43,9 +43,11 @@ class DASD:

def __init__(self):
self._dasdlist = []
- self._totalCylinders = 0
+ self.totalCylinders = 0
self._completedCylinders = 0.0
self._maxFormatJobs = 0
+ self.dasdfmt = "/sbin/dasdfmt"
+ self.commonArgv = ["-y", "-d", "cdl", "-b", "4096"]
self.started = False

def startup(self, *args, **kwargs):
@@ -77,8 +79,9 @@ class DASD:
status = f.read().strip()
f.close()

- if status == "unformatted":
- log.info(" %s is an unformatted DASD" % (device,))
+ if status in ["unformatted", "basic"]:
+ log.info(" %s status is %s, needs dasdfmt" % (device,
+ status,))
self._dasdlist.append(device)

if not len(self._dasdlist):
@@ -127,7 +130,21 @@ class DASD:
log.info(" not running dasdfmt, exiting installer")
sys.exit(0)

- argv = ["-y", "-P", "-d", "cdl", "-b", "4096"]
+ # gather total cylinder count
+ argv = ["-t", "-v"] + self.commonArgv
+ for dasd in self._dasdlist:
+ buf = iutil.execWithCapture(self.dasdfmt, argv + [dasd],
+ stderr="/dev/tty5")
+ for line in buf.splitlines():
+ if line.startswith("Drive Geometry: "):
+ # line will look like this:
+ # Drive Geometry: 3339 Cylinders * 15 Heads = 50085 Tracks
+ cyls = long(filter(lambda s: s, line.split(' '))[2])
+ self.totalCylinders += cyls
+ break
+
+ # format DASDs
+ argv = ["-P"] + self.commonArgv

if intf:
title = P_("Formatting DASD Device", "Formatting DASD Devices", c)
@@ -137,7 +154,7 @@ class DASD:

for dasd in self._dasdlist:
log.info("Running dasdfmt on %s" % (dasd,))
- iutil.execWithCallback("/sbin/dasdfmt", argv + [dasd],
+ iutil.execWithCallback(self.dasdfmt, argv + [dasd],
stdout="/dev/tty5", stderr="/dev/tty5",
callback=self._updateProgressWindow,
callback_data=pw, echo=False)
@@ -146,7 +163,7 @@ class DASD:
else:
for dasd in self._dasdlist:
log.info("Running dasdfmt on %s" % (dasd,))
- iutil.execWithRedirect("/sbin/dasdfmt", argv + [dasd],
+ iutil.execWithRedirect(self.dasdfmt, argv + [dasd],
stdout="/dev/tty5", stderr="/dev/tty5")

def _updateProgressWindow(self, data, callback_data=None):
@@ -161,24 +178,4 @@ class DASD:
self._completedCylinders += 1.0
callback_data.set(self._completedCylinders / self.totalCylinders)

- @property
- def totalCylinders(self):
- """ Total number of cylinders of all unformatted DASD devices. """
- if self._totalCylinders:
- return self._totalCylinders
-
- argv = ["-t", "-v", "-y", "-d", "cdl", "-b", "4096"]
- for dasd in self._dasdlist:
- buf = iutil.execWithCapture("/sbin/dasdfmt", argv + [dasd],
- stderr="/dev/tty5")
- for line in buf.splitlines():
- if line.startswith("Drive Geometry: "):
- # line will look like this:
- # Drive Geometry: 3339 Cylinders * 15 Heads = 50085 Tracks
- cyls = long(filter(lambda s: s, line.split(' '))[2])
- self._totalCylinders += cyls
- break
-
- return self._totalCylinders
-
# vim:tw=78:ts=4:et:sw=4
--
1.6.5.2

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