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exofs: Add option to mount by osdname

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If /dev/osd* devices are shuffled because more devices
where added, and/or login order has changed. It is hard to
mount the FS you want.

Add an option to mount by osdname. osdname is any osd-device's
osdname as specified to the mkfs.exofs command when formatting
the osd-devices.
The new mount format is:
	OPT="osdname=$UUID0,pid=$PID,_netdev"
	mount -t exofs -o $OPT $DEV_OSD0 $MOUNTDIR

if "osdname=" is specified in options above $DEV_OSD0 is
ignored and can be empty.

Also while at it: Removed some old unused Opt_* enums.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Boaz Harrosh
2011-01-31 14:32:14 +02:00
parent 66cd6cad49
commit 9ed9648431
2 changed files with 36 additions and 5 deletions
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10
Documentation/filesystems/exofs.txt
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@ -104,7 +104,15 @@ Where:
exofs specific options: Options are separated by commas (,)
pid=<integer> - The partition number to mount/create as
container of the filesystem.
This option is mandatory.
This option is mandatory. integer can be
Hex by pre-pending an 0x to the number.
osdname=<id> - Mount by a device's osdname.
osdname is usually a 36 character uuid of the
form "d2683732-c906-4ee1-9dbd-c10c27bb40df".
It is one of the device's uuid specified in the
mkfs.exofs format command.
If this option is specified then the /dev/osdX
above can be empty and is ignored.
to=<integer> - Timeout in ticks for a single command.
default is (60 * HZ) [for debugging only]