Date: Mon, 20 Sep 2004 18:50:16 +0200 (CEST) From: User Jhs <jhs@flat.berklix.net> To: freebsd-mobile@freebsd.org Cc: Christopher Sean Hilton <chris@vindaloo.com> Subject: Re: How to get usbd to umount fle systems without crashing ? Message-ID: <200409201650.i8KGoGLF002731@laps.jhs.private> In-Reply-To: Message from "Julian Stacey" <jhs@berklix.org> <200409141058.i8EAwbSm001391@laps.jhs.private>
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Re. my question on mount & dismount of memory sticks:
Thanks to all (Hank, Brooks, Chris, (hope I missed no one)),
( Chris's examples were particularly useful in
Message-id: <20040914155115.GB13849@dantooine.vindaloo.com> )
> You want to use the automounter for this. The reason it's dying is
> because FreeBSD is trying to write information (dirty buffers) back to
> the filesystem after the device has disappeared. The correct sequence
> for this would be umount the filesystem, then unplug the device.
Yes. After I posted, I added to the options list in /etc/fstab ",sync"
& checked with tunefs -p that soft updates were disabled on the USB
memory stick (they already were). It didnt help. I'm not suprised
FreeBSD crashes when a write mounted partition is removed, but it's
sad something mounted read only crashes. Read mounted fd0: floppies dont
crash immediately when removed (fortunately no usbd killing devs there).
> I'm not sure if the portmapper is relevent.
I recall AMD or NFS wants it. On my other FreeBSD-4 hosts using
NFS, portmapper is not neeeded in my rc.conf, as it gets started
automaticaly. In a stand alone laptop with no net, not running NFS
one would still want AMD, so I've set rpcbind_enable="YES" in case.
I have 2 problems still, (with 2 configs as below):
- The 2nd mount in attach line fails (see comment in usbd.conf below).
Maybe some USB kernel problem that might go away when I upgrade
from { 5.2-CURRENT built from src/ day or 2 before Sep 3. }
to 5.2-stable or 5.3-Rel. ?
- AMD fails to unmount USB devices, (but does unmount cdrom OK eg this works:
cd /host/cdrom;ls;cd /; sleep 20;mount |grep cdrom )
Comments requested.
1st Config: of /etc/ usbd.conf fstab amd.map rc.conf
{
usbd.conf:
{
device "jhs Memory stick Celldisk Pro. IOCELL - M-Systems"
vendor 0x08ec
product 0x0834
release 0x0100
attach "sleep 2 ; mount -r /dev.dummy/usb.0 ; mkdir /.amd_mnt/usb.ufs.0 ; mount /.amd_mnt/usb.ufs.0; mkdir /.amd_mnt/usb.dos.0 ; mount /.amd_mnt/usb.dos.0"
# Sleep: proven necessary.
# Mkdir: if already run at previous insertions (inc. boot with memory
# stick in place) will fail subsequently as already exists
# (unless amd removes unused directories) so mkdirs are
# seperated in case it aborts on first pre-existing when 2nd
# still needed.
# Mount: 2nd always fails, regardless which is 1st & 2nd.
# typical error message even if done manually after:
# msdosfs: /dev/da0s1: Operation not permitted.
# Umount: should be done by amd, not by detach, as it crashes system.
# (after detach of usb stick there is no device to umount).
# detach "umount /stick.bsd; umount /stick.dos"
# devname "umass0"
}
fstab:
{
/dev/da0 /dev.dummy/usb.0 msdos ro,noauto 0 0
# da[01] to enable a probe to initiate automatic creation of da[[01]s[1-4].
/dev/da0s1 /.amd_mnt/usb.dos.0 msdos rw,noauto 0 0
/dev/da0s2a /.amd_mnt/usb.ufs.0 ufs rw,noatime,noauto 0 0
}
amd.map:
{
/defaults type:=host;fs:=${autodir}/${rhost};rhost:=${key}
laps type:=link;fs:=..
* opts:=rw,grpid,resvport,vers=2,proto=udp,nodev
cdrom type:=cdfs;fs:=${autodir}/${key};dev:=/dev/acd0;addopts:=ro,rrip
/.amd_mnt/usb.dos.0 type:=program;fs:=${autodir}/${key};\
mount:="/sbin/mount mount ${fs}";unmount:="/sbin/umount umount ${fs}"
/.amd_mnt/usb.ufs.0 type:=program;fs:=${autodir}/${key};\
mount:="/sbin/mount mount ${fs}";unmount:="/sbin/umount umount ${fs}"
}
rc.conf:
{
rpcbind_enable="YES" # No by default, Replaces portmap_enable.
usbd_enable="YES"
amd_enable="YES"
amd_flags="-c 30 -l syslog -n -r -t 3 -w 12 /host /etc/amd.map"
# "-c 30" reduce name caching from default 300 sec.
# "-n" map /host/user to /.amd_mnt/flip
# "-r" inherit existing mounts (eg from USB insertion)
# "-t3" used to be a bit slow see amd.map
# "-w 12" dismount default is 120 seconds
# Frequent scans for unmount for memory stick to avoid crash.
# chris@vindaloo.c__ uses "-c 30" but not "-w 12".
}
}
2nd Config: of /etc/ usbd.conf fstab amd.map rc.conf
{ As above, except to try to debug the amd umount failure:
{
usbd.conf:
{
attach "sleep 2 ; mount -r /dev.dummy/usb.0 ; mkdir /usb.ufs.0 ; mount /usb.ufs.0; mkdir /usb.dos.0 ; mount /usb.dos.0"
}
fstab:
{
/dev/da0s1 /usb.dos.0 msdos rw,noauto 0 0
/dev/da0s2a /usb.ufs.0 ufs rw,noatime,noauto 0 0
}
amd.map:
{
usb.dos.0 type:=msdos;fs:=${autodir}/${key};dev:=/dev/da0s1;addopts:=sync
usb.ufs.0 type:=ufs;fs:=${autodir}/${key};dev:=/dev/da0s2a;addopts:=sync
}
}
-
Julian Stacey. Unix,C,Net & Sys. Eng. Consultant, Munich. http://berklix.com
Mail in Ascii, Html dumped as Spam. Ihr Rauch = mein allergischer Kopfschmerz.
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