Putting Quota on a Samba-shared XFS
	Part I. Miscellaneous subjects (and those still to be sorted)

Putting Quota on a Samba-shared XFS

We have a Samba server with users' homedirs, and we want them under a quota regime. Docs on quota are readily available, and xfs_quota is fairly well documented. There is even an XFS FAQ that mentions quota. But a Google search for an error indicating XFS_QUOTAON were not implemented gave a Slackware question in Linuxquestions as the best result. Luckily, it also featured the solution this time. Oh well.

Procedure 29. Getting XFS quota to work on a sandbox

Installing packages

sudo apt-get install xfsprogs quota

Editing /etc/fstab

In /etc/fstab, modify the line pertaining to the filesystem like this:

/dev/sda3       /mnt/D          xfs     defaults,uquota   0       0

Putting a filesystem on the test partition

sudo mkfs.xfs -f /dev/sda3

Creating quota administration files

	Note
	Maybe the aquota.* don't have to exist

sudo touch /lwphome/aquota.{user,group} sudo chmod 600 /lwphome/aquota.{user,group}

Mounting the FS with quota enabled

Remounting is not enough. The FS has to be unmounted, then mounted again.

sudo umount /mnt/D/ sudo mount /mnt/D/

Setting some quota

sudo xfs_quota -x -c 'limit bsoft=10m bhard=20m jurjen' /mnt/D

At least after this, you can use edquota as usual.

Don't use a trailing slash here!
Testing quota enforcement

sudo touch /mnt/D/bigblah sudo chown jurjen:jurjen !$ dd if=/dev/zero of=/mnt/D/bigblah bs=1024 count=1000000000 dd: writing `/mnt/D/bigblah': Disk quota exceeded 20417+0 records in 20416+0 records out 20905984 bytes (21 MB) copied, 0.0443132 s, 472 MB/s
Reading a report

sudo xfs_quota -x -c report /mnt/D 2>/dev/null |head User quota on /mnt/D (/dev/sda3) Blocks User ID Used Soft Hard Warn/Grace ---------- -------------------------------------------------- root 0 0 0 00 [--------] chris 0 10240 20480 00 [--------] jurjen 20416 10240 20480 00 [6 days]

This user not shown by repquota

	At least after this, you can use edquota as usual.
	Don't use a trailing slash here!


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