xfsdq, xfsrq - XFS dump and restore quota

xfsdq [ -g|-u ] [ -f path ] filesystem
xfsrq [ -g|-u ] xfsdump_quotas

xfsdq outputs a summary of the disk quotas for the specified XFS filesystem for either all users declared in the local /etc/passwd file, or all groups declared in the local /etc/group file.

The output format exactly matches that produced by the IRIX repquota command, given the -e option. The format contains two lines for each user/group - the first line contains the filesystem device file, the second contains the uid/gid, block soft limit, block hard limit, inode soft limit, and finally the inode hard limit (in that order).

xfsdump runs xfsdq on those filesystems with quota enabled, and sends the output to a file (standard output, by default) which is subsequently stored on the dump device. For user quota, this file is named xfsdump_quotas, for group quota it is named xfsdump_quotas_group. Thus, the primary purpose of xfsdq is to maintain this dump file format between IRIX and Linux, such that xfsdump backups remain interchangable.

xfsrq is a simple wrapper around setquota(8) which automates the restoration of quota information using this xfsdump_quotas file.

The -f option specifies the file to which xfsdq will write. This file must not already exist (it is created by xfsdq).

The -u (user) option specifies user quota should be reported. This is the default.

The -g (group) option specifies that group quota are to be reported.

The filesystem argument should be the filesystem mount point, and not the device.

In order to restore quota information using the output from xfsdq, one must first restore a copy of the xfsdump_quotas file from the dump device.

On Linux, user quota can then be restored using:

        # xfsrq -u xfsdump_quotas

On IRIX, the equivalent command is:

        # edquota -i xfsdump_quotas

Only user quota are supported by both Linux and IRIX. Group quota are not supported on IRIX and project quota are not supported on Linux.

The soft and hard block limits reported by xfsdq are in units of 512 bytes for compatibility with IRIX. The Linux quota utilities, e.g. quota(1) and repquota(8), report blocks in units of 1024 bytes - xfsrq performs the necessary conversions automatically.

/etc/mtab

default filesystems

/etc/passwd

default set of users

/etc/passwd

default set of groups

quota(1), repquota(8), setquota(8), xfsdump(8), xfs(5).