130 lines
3.8 KiB
Groff
130 lines
3.8 KiB
Groff
.\" Copyright (c) 2001 Nik Clayton
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 30, 2007
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.Dt QUOTA.USER 5
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.Os
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.Sh NAME
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.Nm quota.user , quota.group
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.Nd per file system quota database
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.Sh DESCRIPTION
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Each file system with active quotas should contain a
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.Pa quota.user
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and
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.Pa quota.group
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file in the file system root.
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These files are created by
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.Xr quotacheck 8 ,
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and should be edited with
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.Xr edquota 8 .
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It is possible to specify a different location and file name with the
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.Dq Li userquota
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and
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.Dq Li groupquota
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options in the
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.Xr fstab 5
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file.
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.Pp
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The data files contain the following information:
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.Pp
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.Bl -bullet -offset indent -compact
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.It
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Current block usage
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.It
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Current number of files
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.It
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Soft block limit
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.It
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Soft file limit
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.It
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Hard block limit
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.It
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Hard file limit
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.It
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Block grace time remaining if over the soft limit
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.It
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File grace time remaining if over the soft limit
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.El
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.Pp
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See
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.Xr edquota 8
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for an explanation on the various limits and grace periods.
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.Pp
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During normal quota operations the
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.Xr quotactl 2
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interface is used to query or set quota information and the kernel
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will maintain the data files as needed.
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If quotas are disabled on
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a file system, but marked as having quotas enabled in
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.Xr fstab 5 ,
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then the quota data files will be used directly.
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.Pp
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The data files are stored as an array of
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.Dq Li struct dqblk
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structures, as defined in
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.In ufs/ufs/quota.h ,
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and indexed by UID or GID.
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The data files will be written as a sparse file if possible.
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Data is only maintained for ids that have either non-zero usage or
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non-zero quota limits.
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If an attempt is made to access data for an id that would exist past the
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end of the current data file, a quota structure with all values set
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to zero will be created, and the data file extended as needed.
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The
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.Xr quotacheck 8
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utility will truncate the data files to the minimum size needed
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to store the highest id with either non-zero file usage or
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non-zero quota limits.
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.Pp
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The data record for id 0 has special meaning. If the
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.Dq Dv dqb_btime
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or
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.Dq Dv dbq_itime
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fields are non-zero, they are used to indicate the grace period on
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that file system for users who have exceeded their soft limit.
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These times can be set by
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.Xr edquota 8
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with the
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.Fl t
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flag.
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If no explicit grace period has been set with
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.Xr edquota 8 ,
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then the default value of 7 days will be used.
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The default values are defined by
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.Dv MAX_DQ_TIME
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and
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.Dv MAX_IQ_TIME
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in
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.In ufs/ufs/quota.h .
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.Sh SEE ALSO
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.Xr quota 1 ,
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.Xr quotactl 2 ,
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.Xr fstab 5 ,
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.Xr edquota 8 ,
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.Xr quotacheck 8 ,
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.Xr quotaoff 8 ,
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.Xr quotaon 8 ,
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.Xr repquota 8
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