[dolphin] [Bug 448361] New: Dolphin behavior on Network shares

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=448361

            Bug ID: 448361
           Summary: Dolphin behavior on Network shares
           Product: dolphin
           Version: 21.12.0
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: temptempor at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
***
Dolphin is severely slowed down/halted/crashed by unavailable/slow/unstable
network storage when these have been mounted with GIO/GVFS.
***


STEPS TO REPRODUCE
1. Mount an SMB share: `gio mount smb://user@share`
2. Disconnect the share server from the network/prevent access.
3. Try to open a new Dolphin session

OBSERVED RESULT

Dolphin may take more than 1 minute to open (even if it the directories it
remembers and tries to open weren't dependent on the share) and subsequent
navigation will be slow.

When running strace, I noticed this:

```
statx(AT_FDCWD,
"/run/user/1000/gvfs/smb-share:port=445,server=127.0.0.1,share=e,user=shareuser",
AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffee6161550) = -1 EIO (Erreur
d'entrée/sortie) / (IO Error)
statx(AT_FDCWD,
"/run/user/1000/gvfs/smb-share:port=445,server=127.0.0.1,share=e,user=shareuser",
AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7ffee6161550) = -1 EIO (Erreur
d'entrée/sortie) / (IO Error)
```

EXPECTED RESULT

Dolphin should only have a problem when trying to access files or folders on
the faulty network mount and have a reasonable timeout when it tries to stat a
directory that just won't open. Also, when while trying to access the
problematic path, only the tab pointing on that path should be affected vs the
entirety of Dolphin UI.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2
Kernel Version: 5.15.11-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800X 8-Core Processor
Memory: 62.7 Gio of RAM
Graphics Processor: AMD Radeon RX 6900 XT

ADDITIONAL INFORMATION

This was noticed with a SMB server from a Windows VM that was paused (the VM
itself) while the share was still mounted. When resuming the VM, the share is
responsive again (and so is Dolphin).

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