On Sat, Nov 15, 2008 at 05:25:19PM +0100, Michael Biebl wrote: > Florian Lohoff wrote: > > Package: pm-utils > > Version: 1.1.2.4-1 > > Severity: wishlist > > > > Hi, > > please provide a sleep scriptlet to unmount network filesystems. I am > > currently using this basically copied from /etc/init.d/umountnfs.sh > > which does more than needed (unmounting sysfs etc) ... This needs to > > be done before network manager is instructed to shut down networking > > e.g. i used priority 07 ... > > Why is it necessary to unmount the network filesystems and shouldn't > they mounted on resume again.
Because typically your network filesystems will not be there after
resume. At least thats my typical use case - suspending at home -
going to work - resuming - then your serves will not be there and all
desktop file managers will hang because of the long timeouts to retry to
establish the connection again. TCP based filesystems will even timeout
on the server as the tcp connection endpoint is gone and your tcp session
will timeout - So you come back and try to regain connectivity on a tcp
session the server does not know about anymore. The only sane state is
to unmount all network based filesystems on suspend.
mounting on resume might be done based on the ones in the fstab. Typically
i have all temporary available network filesystems in the fstab as
noauto,user so i mount them manually if i need them.
Doing a
mount -a -t nfs|cifs|smbfs|nfs4
on resume should be okay. If they are in the fstab to be automatically
mounted thats what the user wanted to do ...
Anyway - unmounting network based storage is what hibernate does
and it even goes further by killing programs which have open files on
the storage. I would go that far without user really wanting to do that.
A sane way could be to refuse suspend if there are open files on the
network storage as the state could get severly garbled if suspending
with potentially dirty cache content or even resuming with some
expectation about the files state (which might have changed in the last
hours while we were suspended) so you could garble servers files on
resume because somebody else already appended to the file etc
I have no clue about dealing with nbd, iscsi, ataoe or all the network
based block devices. Those should go away too but thats beyond the scope
of this wishlist bug.
Flo
--
Florian Lohoff [EMAIL PROTECTED] +49-171-2280134
Those who would give up a little freedom to get a little
security shall soon have neither - Benjamin Franklin
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