[LU-19694] Print TTY message when Trash Can used up quota

• Type: New Feature
• Resolution: Unresolved
• Priority: Medium
• Severity: 3
• Assignee: WC Triage
• Reporter: Li Xi

Description

When trash_can_uid/gid/projid disabled, quota limitation can be walked around by removing files. So administrators might want to enforce quota limitation on the users including Trash Can. However, a user can be completely lost when its trash used up the quota while their workspace is empty. In that case, printing TTY message seems the only way to remind them to cleanup trash can.

Reminding users to clean up their Trash Can can be helpful too, e.g. when half of their quota are occupied by trash.

The example TTY message printing codes can be found in Linux kernel quota codes, and here:

https://review.whamcloud.com/c/fs/lustre-release/+/32898