[dolphin] [Bug 429950] New: Dolphin refuses to copy files even though there is plenty of free space

[Nathan Shearer]

https://bugs.kde.org/show_bug.cgi?id=429950

            Bug ID: 429950
           Summary: Dolphin refuses to copy files even though there is
                    plenty of free space
           Product: dolphin
           Version: 20.08.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: kde-20091112 at nathanshearer.ca
                CC: kfm-devel at kde.org
  Target Milestone: ---

Dolphin appears to now have a feature that detects free space and prevents
files from being copied, however Dolphin is unable to actually calculate free
space properly and blocks all file transfers to remote filesystems.

1. A cifs fileserver shares data and has plenty of free space.
//fileserver/share
2. An intermediate server mounts //fileserver/share at
/mnt/remote/fileserver-share
3. My workstation mounts intermediate:/mnt/remote at /mnt/remote

>From my system I can df -h /mnt/remote and see the tiny amount of free space on
the root volume of intermediate
>From my system I can df -h /mnt/remote/fileserver-share and see the ample free
space on the actual remote file server share.
I can also df -h /mnt/remote/fileserver-share/some/deep/folder/path and see the
same ample free space on the actual file server.

Dolphin does not check the full path and instead only looks at the local
mountpoint on my workstation. It assumes there is insufficient space to copy
the file when there is actually plenty of space on the remote server. I am
unable to copy the file. Doing it manually with cp works fine in a terminal.

There is also no method to disable this feature.

Side Note: Why am I using an intermediate server instead of mounting the file
server directly on my workstation? Well it's because so much of Dolphin and KDE
is always blocking on disk IO that it effectively renders my entire computer
unusable because some background process is hung up on a slow connection and
blocks the entire UI while some files are being copied in the background or a
slow folder is simply being enumerated. So I am concealing the remote servers
behind a mountpoint proxy server so KDE will stop freezing. Having the UI
freeze because of high latency or a low bandwidth remote file server is
extremely frustrating.

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