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Macka

2017-Jun-20 12:49 UTC

Dovecot >=2.2.29 + Filesystem quota = incorrect storage information

Hi,

I have problem with quota storage information in dovecot-2.2.29 (and
newer versions, too - 2.2.30.2).
I use FS quota backend.


............................
# 2.2.29.1 (e0b76e3): /etc/dovecot/dovecot.conf
# OS: Linux 4.4.68-1 x86_64

mail_plugins = quota

plugin {
  quota = fs:User quota:mount=/poczta:user
  quota2 = fs:Group quota:mount=/poczta:group
}

protocol imap {
  mail_max_userip_connections = 10
  mail_plugins = "imap_quota mail_log notify antispam"
}
.................................


After upgrade from 2.2.27 to 2.2.29 (newest 2.2.30.2 too), dovecot
returns incorrect informations about quota storage:

# doveadm quota get -u myusername

Quota name Type       Value  Limit                 %
User quota STORAGE 10960896 100000             10960

or

# ( echo "A1 GETQUOTAROOT INBOX"; echo "A2 logout" ) |
/usr/lib64/dovecot/imap -u myusername

* PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID
ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN
NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH
ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE NOTIFY
SPECIAL-USE QUOTA] Logged in as myusername
imap(myusername): Info: Logged out in=31 out=588
* QUOTAROOT INBOX "User quota"
* QUOTA "User quota" (STORAGE 10960896 100000)
A1 OK Getquotaroot completed (0.001 + 0.000 secs).
* BYE Logging out
A2 OK Logout completed (0.001 + 0.000 secs).


Values are in BYTES and Limit in BLOCKS which gives insane information in %


Other server with older version 2.2.27 returns correct numbers (both in
BLOCKS)

# doveadm quota get -u username2
Quota name Type     Value  Limit                   %
user       STORAGE 558336 614400             90


Is this a bug in new versions?
How can I fix this?

-- 
macka

Timo Sirainen

2017-Jun-20 19:25 UTC

head link

Dovecot >=2.2.29 + Filesystem quota = incorrect storage information

On 20 Jun 2017, at 15.49, Macka <dovecot at macka.pl>
wrote:> 
> Hi,
> 
> I have problem with quota storage information in dovecot-2.2.29 (and
> newer versions, too - 2.2.30.2).
> I use FS quota backend.
..> After upgrade from 2.2.27 to 2.2.29 (newest 2.2.30.2 too), dovecot
> returns incorrect informations about quota storage:
Hmm. There are zero differences in quota-fs code between 2.2.27 and 2.2.30. Are
you sure the difference isn't something else than Dovecot version?

Macka

2017-Jun-21 15:46 UTC

head link

Dovecot >=2.2.29 + Filesystem quota = incorrect storage information

W dniu 20.06.2017 o 21:25, Timo Sirainen pisze:> On 20 Jun 2017, at 15.49, Macka <dovecot at macka.pl> wrote:
>> Hi,
>>
>> I have problem with quota storage information in dovecot-2.2.29 (and
>> newer versions, too - 2.2.30.2).
>> I use FS quota backend.
> .
>> After upgrade from 2.2.27 to 2.2.29 (newest 2.2.30.2 too), dovecot
>> returns incorrect informations about quota storage:
> Hmm. There are zero differences in quota-fs code between 2.2.27 and 2.2.30.
Are you sure the difference isn't something else than Dovecot version?
>
>
>You are probably right.

It took me some time but it looks like the problem is in the glibc-2.25
library or rather in the header files used during the compilation (or
maybe in something else). I recompiled (.src.rpm's from PLD linux
distribution) v2.2.27 and v2.2.30.2 on another machine with glibc-2.24
and then I installed them on a machine with glibc-2.25 libraries.

Both dovecot's versions correctly show used space.

All dovecot's versions, compiled on a machine with glibc-2.25 and
installed on the same machine, returns incorrect account used space.

Found differences quota.h files but do not know if it depends on it?

*/usr/include/sys/quota.h (from glibc-headers-2.24-4.x86_64) - 7974 bytes*
================================================================/* This just
represents the non-kernel parts of <linux/quota.h>.
 *
 * here's the corresponding copyright:
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Elz at The University of Melbourne.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _SYS_QUOTA_H
#define _SYS_QUOTA_H 1

#include <features.h>
#include <sys/types.h>

/*
 * Select between different incompatible quota versions.
 * Default to the version used by Linux kernel version 2.4.22
 * or later.  */
#ifndef _LINUX_QUOTA_VERSION
# define _LINUX_QUOTA_VERSION 2
#endif

/*
 * Convert diskblocks to blocks and the other way around.
 * currently only to fool the BSD source. :-)
 */
#define dbtob(num) ((num) << 10)
#define btodb(num) ((num) >> 10)

/*
 * Convert count of filesystem blocks to diskquota blocks, meant
 * for filesystems where i_blksize != BLOCK_SIZE
 */
#define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / BLOCK_SIZE)

/*
 * Definitions for disk quotas imposed on the average user
 * (big brother finally hits Linux).
 *
 * The following constants define the amount of time given a user
 * before the soft limits are treated as hard limits (usually resulting
 * in an allocation failure). The timer is started when the user crosses
 * their soft limit, it is reset when they go below their soft limit.
 */
#define MAX_IQ_TIME  604800     /* (7*24*60*60) 1 week */
#define MAX_DQ_TIME  604800     /* (7*24*60*60) 1 week */

#define MAXQUOTAS 2
#define USRQUOTA  0             /* element used for user quotas */
#define GRPQUOTA  1             /* element used for group quotas */

/*
 * Definitions for the default names of the quotas files.
 */
#define INITQFNAMES { \
   "user",      /* USRQUOTA */ \
   "group",   /* GRPQUOTA */ \
   "undefined", \
};

#define QUOTAFILENAME "quota"
#define QUOTAGROUP "staff"

#define NR_DQHASH 43          /* Just an arbitrary number any
suggestions ? */
#define NR_DQUOTS 256         /* Number of quotas active at one time */

/*
 * Command definitions for the 'quotactl' system call.
 * The commands are broken into a main command defined below
 * and a subcommand that is used to convey the type of
 * quota that is being manipulated (see above).
 */
#define SUBCMDMASK  0x00ff
#define SUBCMDSHIFT 8
#define QCMD(cmd, type)  (((cmd) << SUBCMDSHIFT) | ((type) &
SUBCMDMASK))

#if _LINUX_QUOTA_VERSION < 2
# define Q_QUOTAON  0x0100      /* enable quotas */
# define Q_QUOTAOFF 0x0200      /* disable quotas */
# define Q_GETQUOTA 0x0300      /* get limits and usage */
# define Q_SETQUOTA 0x0400      /* set limits and usage */
# define Q_SETUSE   0x0500      /* set usage */
# define Q_SYNC     0x0600      /* sync disk copy of a filesystems quotas */
# define Q_SETQLIM  0x0700      /* set limits */
# define Q_GETSTATS 0x0800      /* get collected stats */
# define Q_RSQUASH  0x1000      /* set root_squash option */
#else
# define Q_SYNC     0x800001    /* sync disk copy of a filesystems quotas */
# define Q_QUOTAON  0x800002    /* turn quotas on */
# define Q_QUOTAOFF 0x800003    /* turn quotas off */
# define Q_GETFMT   0x800004    /* get quota format used on given
filesystem */
# define Q_GETINFO  0x800005    /* get information about quota files */
# define Q_SETINFO  0x800006    /* set information about quota files */
# define Q_GETQUOTA 0x800007    /* get user quota structure */
# define Q_SETQUOTA 0x800008    /* set user quota structure */
# define Q_GETNEXTQUOTA 0x800009        /* get disk limits and usage >ID */
#endif

/*
 * The following structure defines the format of the disk quota file
 * (as it appears on disk) - the file is an array of these structures
 * indexed by user or group number.
 */
#if _LINUX_QUOTA_VERSION < 2
struct dqblk
  {
    u_int32_t dqb_bhardlimit;   /* absolute limit on disk blks alloc */
    u_int32_t dqb_bsoftlimit;   /* preferred limit on disk blks */
    u_int32_t dqb_curblocks;    /* current block count */
    u_int32_t dqb_ihardlimit;   /* maximum # allocated inodes */
    u_int32_t dqb_isoftlimit;   /* preferred inode limit */
    u_int32_t dqb_curinodes;    /* current # allocated inodes */
    time_t dqb_btime;           /* time limit for excessive disk use */
    time_t dqb_itime;           /* time limit for excessive files */
  };
#else

/* Flags that indicate which fields in dqblk structure are valid.  */
#define QIF_BLIMITS     1
#define QIF_SPACE       2
#define QIF_ILIMITS     4
#define QIF_INODES      8
#define QIF_BTIME       16
#define QIF_ITIME       32
#define QIF_LIMITS      (QIF_BLIMITS | QIF_ILIMITS)
#define QIF_USAGE       (QIF_SPACE | QIF_INODES)
#define QIF_TIMES       (QIF_BTIME | QIF_ITIME)
#define QIF_ALL         (QIF_LIMITS | QIF_USAGE | QIF_TIMES)

struct dqblk
  {
    u_int64_t dqb_bhardlimit;   /* absolute limit on disk quota blocks
alloc */
    u_int64_t dqb_bsoftlimit;   /* preferred limit on disk quota blocks */
    u_int64_t dqb_curspace;     /* current quota block count */
    u_int64_t dqb_ihardlimit;   /* maximum # allocated inodes */
    u_int64_t dqb_isoftlimit;   /* preferred inode limit */
    u_int64_t dqb_curinodes;    /* current # allocated inodes */
    u_int64_t dqb_btime;        /* time limit for excessive disk use */
    u_int64_t dqb_itime;        /* time limit for excessive files */
    u_int32_t dqb_valid;        /* bitmask of QIF_* constants */
  };
#endif

/*
 * Shorthand notation.
 */
#define dq_bhardlimit   dq_dqb.dqb_bhardlimit
#define dq_bsoftlimit   dq_dqb.dqb_bsoftlimit
#if _LINUX_QUOTA_VERSION < 2
# define dq_curblocks   dq_dqb.dqb_curblocks
#else
# define dq_curspace    dq_dqb.dqb_curspace
# define dq_valid       dq_dqb.dqb_valid
#endif
#define dq_ihardlimit   dq_dqb.dqb_ihardlimit
#define dq_isoftlimit   dq_dqb.dqb_isoftlimit
#define dq_curinodes    dq_dqb.dqb_curinodes
#define dq_btime        dq_dqb.dqb_btime
#define dq_itime        dq_dqb.dqb_itime

#define dqoff(UID)      ((loff_t)((UID) * sizeof (struct dqblk)))

#if _LINUX_QUOTA_VERSION < 2
struct dqstats
  {
    u_int32_t lookups;
    u_int32_t drops;
    u_int32_t reads;
    u_int32_t writes;
    u_int32_t cache_hits;
    u_int32_t pages_allocated;
    u_int32_t allocated_dquots;
    u_int32_t free_dquots;
    u_int32_t syncs;
  };
#else

/* Flags that indicate which fields in dqinfo structure are valid.  */
# define IIF_BGRACE     1
# define IIF_IGRACE     2
# define IIF_FLAGS      4
# define IIF_ALL        (IIF_BGRACE | IIF_IGRACE | IIF_FLAGS)

struct dqinfo
  {
    u_int64_t dqi_bgrace;
    u_int64_t dqi_igrace;
    u_int32_t dqi_flags;
    u_int32_t dqi_valid;
  };
#endif

__BEGIN_DECLS

extern int quotactl (int __cmd, const char *__special, int __id,
                     caddr_t __addr) __THROW;

__END_DECLS

#endif /* sys/quota.h */

*/usr/include/sys/quota.h (from glibc-headers-2.25-2.x86_64) - 5170 bytes*
=======================================================================/* This
just represents the non-kernel parts of <linux/quota.h>.
   Copyright (C) 1998-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Elz at The University of Melbourne.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _SYS_QUOTA_H
#define _SYS_QUOTA_H 1

#include <features.h>
#include <sys/types.h>

#include <linux/quota.h>

/*
 * Convert diskblocks to blocks and the other way around.
 * currently only to fool the BSD source. :-)
 */
#define dbtob(num) ((num) << 10)
#define btodb(num) ((num) >> 10)

/*
 * Convert count of filesystem blocks to diskquota blocks, meant for
 * filesystems where i_blksize != 1024.
 */
#define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / 1024)

/*
 * Definitions for disk quotas imposed on the average user
 * (big brother finally hits Linux).
 *
 * The following constants define the amount of time given a user
 * before the soft limits are treated as hard limits (usually resulting
 * in an allocation failure). The timer is started when the user crosses
 * their soft limit, it is reset when they go below their soft limit.
 */
#define MAX_IQ_TIME  604800     /* (7*24*60*60) 1 week */
#define MAX_DQ_TIME  604800     /* (7*24*60*60) 1 week */

#define QUOTAFILENAME "quota"
#define QUOTAGROUP "staff"

#define NR_DQHASH 43          /* Just an arbitrary number any
suggestions ? */
#define NR_DQUOTS 256         /* Number of quotas active at one time */

/* Old name for struct if_dqblk.  */
struct dqblk
  {
    __uint64_t dqb_bhardlimit;  /* absolute limit on disk quota blocks
alloc */
    __uint64_t dqb_bsoftlimit;  /* preferred limit on disk quota blocks */
    __uint64_t dqb_curspace;    /* current quota block count */
    __uint64_t dqb_ihardlimit;  /* maximum # allocated inodes */
    __uint64_t dqb_isoftlimit;  /* preferred inode limit */
    __uint64_t dqb_curinodes;   /* current # allocated inodes */
    __uint64_t dqb_btime;       /* time limit for excessive disk use */
    __uint64_t dqb_itime;       /* time limit for excessive files */
    __uint32_t dqb_valid;       /* bitmask of QIF_* constants */
  };

/*
 * Shorthand notation.
 */
#define dq_bhardlimit   dq_dqb.dqb_bhardlimit
#define dq_bsoftlimit   dq_dqb.dqb_bsoftlimit
#define dq_curspace     dq_dqb.dqb_curspace
#define dq_valid        dq_dqb.dqb_valid
#define dq_ihardlimit   dq_dqb.dqb_ihardlimit
#define dq_isoftlimit   dq_dqb.dqb_isoftlimit
#define dq_curinodes    dq_dqb.dqb_curinodes
#define dq_btime        dq_dqb.dqb_btime
#define dq_itime        dq_dqb.dqb_itime

#define dqoff(UID)      ((loff_t)((UID) * sizeof (struct dqblk)))

/* Old name for struct if_dqinfo.  */
struct dqinfo
  {
    __uint64_t dqi_bgrace;
    __uint64_t dqi_igrace;
    __uint32_t dqi_flags;
    __uint32_t dqi_valid;
  };

__BEGIN_DECLS

extern int quotactl (int __cmd, const char *__special, int __id,
                     __caddr_t __addr) __THROW;

__END_DECLS

#endif /* sys/quota.h */

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