Possibility to go above the quota

[sowjanyakch]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

The system is incorrectly calculating the quota usage when performing file delete and restore operations. This can lead to exceeding the allocated quota, potentially saturating the S3 storage.

Steps to reproduce

1. Create a test user with 1GB quota.
2. Upload a file of 500MB to S3.
3. Copy the uploaded file and delete the original file.
4. Create another copy of the file and delete the original copied file.
5. Create another copy of the file.
6. Restore the first two delete files.
7. Quota is shown as 2GB, exceeding the allocated limit.

Expected behavior

The quota should not exceed 1 GB in any given case.

Nextcloud Server version

28

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[sorbaugh]

@Pytal can you check if this is related to the trash-restoration functionality? 🙏

[Pytal]

Deleted files are automatically cleaned up by a background job whenever the quota is exceeded until the quota is met.

Although the quota may be exceeded temporarily, the next run of the background job, see https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/background_jobs_configuration.html for setting the interval between jobs, will remedy this.