** Description changed:
[Impact]
- * Dovecot users using the fs quota plugin see wrong quota calculation
- (overquota situation)
-
- * LTS version is affected. Bug would remain for a long time.
-
- * Patch is simple (1 line)
+ Dovecot users using the fs quota plugin see wrong quota calculation
+ (incorrect overquota situation).
[Test Case]
+ On host system:
+ ---------------
+ $ multipass launch 18.04 --name ubuntu-bionic
+ $ multipass exec ubuntu-bionic -- bash
- * Prerequisite: user quota configured on filesystem where dovecot stores
your
- email (e.g. /home partition)
+ In vm:
+ ------
+ $ sudo passwd ubuntu # set to 'ubuntu'
- * configure dovecot fs quota plugin. for details see below.
+ # Enable quota support on root partition
+ $ sudo apt-get install linux-image-extra-virtual
+ $ sudo nano /etc/fstab
+ LABEL=cloudimg-rootfs / ext4 usrquota,grpquota 0 0
+ $ sudo mount -o remount /
+ $ sudo cat /proc/mounts | grep ' / '
+ /dev/sda1 / ext4 rw,relatime,quota,usrquota,grpquota,data=ordered 0 0
- * use doveadm command to verify the result:
- $doveadm quota get -u user
- The result is shown in kb and as a percentage value
+ # Set a quota
+ $ sudo apt-get install quota
+ $ sudo quotacheck -ugm /
+ $ sudo quotaon -v /
+ /dev/sda1 [/]: group quotas turned on
+ /dev/sda1 [/]: user quotas turned on
+ $ sudo edquota -u ubuntu
+ Disk quotas for user ubuntu (uid 1000):
+ Filesystem blocks soft hard inodes
soft hard
+ /dev/sda1 36 0 0 12
0 0
+
+ # Set these to some arbitrary values:
+ Filesystem blocks soft hard inodes
soft hard
+ /dev/sda1 36 10 20 12
0 0
+ $ sudo quota -vs ubuntu
+ Disk quotas for user ubuntu (uid 1000):
+ Filesystem space quota limit grace files quota limit grace
+ /dev/sda1 48K* 10K 20K 7days 14 0 0
+ $ sudo quota -vs ubuntu
+ Disk quotas for user ubuntu (uid 1000):
+ Filesystem space quota limit grace files quota limit grace
+ /dev/sda1 48K* 10K 20K 7days 14 0 0
+ $ sudo setquota -u ubuntu 200M 220M 0 0 /
+ $ sudo quota -v ubuntu
+ Disk quotas for user ubuntu (uid 1000):
+ Filesystem blocks quota limit grace files quota limit grace
+ /dev/sda1 52 204800 225280 15 0 0
+
+ # Install dovecot and configure with the quota plugin
+ $ sudo apt-get install dovecot-core dovecot-imapd
+ $ sudo sed -i 's/^#mail_plugins = /mail_plugins = quota/'
/etc/dovecot/conf.d/10-mail.conf
+ $ sudo sed -i 's/ #mail_plugins = / mail_plugins = quota /'
/etc/dovecot/conf.d/20-imap.conf
+ $ sudo sed -i 's/ #quota = fs:User quota/ quota = fs:User quota'
/etc/dovecot/conf.d/90-quota.conf
+ $ sudo service dovecot restart
+ $ doveadm quota get -u ubuntu
+ Quota name Type Value Limit %
+ User quota STORAGE 53248 204800 26
+
+ # Connect via imap
+ $ openssl s_client -connect localhost:993
+ * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
AUTH=PLAIN] Dovecot (Ubuntu) ready.
+ ? LOGIN ubuntu ubuntu
+ ? OK [... QUOTA] Logged in
+ ? GETQUOTAROOT INBOX
+ * QUOTAROOT INBOX "User quota"
+ * QUOTA "User quota" (STORAGE 53248 204800)
+ ? OK Getquotaroot completed (0.001 + 0.000 secs).
+
[Regression Potential]
- * only users using the fs quota plugin are affected
+ * only users using the fs quota plugin are affected
-
+ [Original Report]
Packages:
dovecot 2.2.33.2-1-ubuntu4.1
ubuntu 18.04.1 LTS
The quota is erroneously calculated with the fs quota plugin.
It was working fine on ubuntu 16.04 with the same config.
+ * Prerequisite: user quota configured on filesystem where dovecot
+ stores your email (e.g. /home partition)
+
+ * configure dovecot fs quota plugin.
+
Quota configuration:
plugin {
quota = fs:User quota
}
+
+ * use doveadm command to verify the result:
+ $doveadm quota get -u user
+ The result is shown in kb and as a percentage value
Here's the IMAP Session:
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
AUTH=PLAIN AUTH=LOGIN] Dovecot (Ubuntu) ready.
? LOGIN user password
? OK [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 QUOTA] Logged in
? GETQUOTAROOT INBOX
* QUOTAROOT INBOX "User quota"
* QUOTA "User quota" (STORAGE 2775445504 4096001)
? OK Getquotaroot completed (0.001 + 0.000 secs).
Storage should actually be around 2775445 KB.
The quota is correct from my ext3 filesystem quota of 4096001 KB.
Output of repquota:
*** Report for user quotas on device /dev/sdc
Block grace time: 7days; Inode grace time: 7days
Block limits File limits
User used soft hard grace used soft hard grace
----------------------------------------------------------------------
user -- 2710396 4096001 4194304 65743 0 0
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https://bugs.launchpad.net/bugs/1795919
Title:
fs quota calculation is wrong
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