[nalladev]

When copying files to an MTP device mounted via GVfs FUSE, compio's io_uring backend fails to open the destination file with O_CREAT|O_EXCL. The existing gio_file_copy fallback only triggered on write_at failures, so the error propagated before GIO was ever tried.

Now, if the destination open fails via compio, we fall back to gio_file_copy (which uses POSIX I/O through GIO), matching the same fallback pattern already used for write_at Unsupported errors.

Fixes #1782

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[jacobgkau]

Like Michael, I also wasn't able to recreate any MTP issues with my own Android devices, but I'm not seeing any regressions with MTP, either.

Standard regression testing passed:

Checklist

Basic navigation

• Middle-click opens directory in a new tab (not focused).
• Open two scrollable tabs. Scroll one tab, then switch to the other tab; it should not have scrolled.
• Hover over the top item in the folder, then scroll down until it's out of view (while still hovered). On scrolling back up (with the mouse in a different position), the item should not have the hover highlight.
• Right-click an item in the sidebar. No visual change should occur with the rest of the items.
• Remove an item from the sidebar, then re-pin it.

File operations

• Right-click -> Create a new folder, then enter it.
• Right-click in the empty folder -> Create a new file.
• Navigate to the parent folder, create another new file, then drag it into the created folder.
• Files can be renamed.
• Files can be opened with non-default apps & browsing store for new apps works.
• Normal right-click shows Move to trash option.
• Shift right-click, and right-click followed by Shift, both show Permanently delete option.

Advanced navigation & view settings

• Image and video thumbnails generate & display in local folders.
• Gallery preview shows with Spacebar.
• Details pane shows with Ctrl+Spacebar.
• Zoom in/out and reset to default zoom work.
• Ctrl+1 and Ctrl+2 switch between list and icon view.
• Ctrl+H shows/hides hidden files.
• Directories can be sorted at top or inline.
• Settings -> Theme works.
• Settings -> Type to Search affects behavior as designed.
• Single-click to open setting takes effect.
• Recents in sidebar setting works.
• Sorting options work.
• Cutting, copying, and pasting files works.
• F5 reloads current directory.
• Left sidebar can be collapsed and expanded.

External filesystems

• Add a network drive (e.g. SFTP) and navigate into it.
• Plug in a USB drive; able to mount, browse, and eject.

Integrations

• Desktop icons display as expected
• Drag-and-drop into Firefox works

CI failed

[jacobgkau]

It does look like the Cargo Build & Test check has failed, even though this compiled successfully on my test machine. I guess I'll try having the build server built it.

[jacobgkau]

CI's working now. Testing looks the same as before.

Regression testing passed again:

Checklist

Basic navigation

• Middle-click opens directory in a new tab (not focused).
• Open two scrollable tabs. Scroll one tab, then switch to the other tab; it should not have scrolled.
• Hover over the top item in the folder, then scroll down until it's out of view (while still hovered). On scrolling back up (with the mouse in a different position), the item should not have the hover highlight.
• Right-click an item in the sidebar. No visual change should occur with the rest of the items.
• Remove an item from the sidebar, then re-pin it.

File operations

• Right-click -> Create a new folder, then enter it.
• Right-click in the empty folder -> Create a new file.
• Navigate to the parent folder, create another new file, then drag it into the created folder.
• Files can be renamed.
• Files can be opened with non-default apps & browsing store for new apps works.
• Normal right-click shows Move to trash option.
• Shift right-click, and right-click followed by Shift, both show Permanently delete option.

Advanced navigation & view settings

• Image and video thumbnails generate & display in local folders.
• Gallery preview shows with Spacebar.
• Details pane shows with Ctrl+Spacebar.
• Zoom in/out and reset to default zoom work.
• Ctrl+1 and Ctrl+2 switch between list and icon view.
• Ctrl+H shows/hides hidden files.
• Directories can be sorted at top or inline.
• Settings -> Theme works.
• Settings -> Type to Search affects behavior as designed.
• Single-click to open setting takes effect.
• Recents in sidebar setting works.
• Sorting options work.
• Cutting, copying, and pasting files works.
• F5 reloads current directory.
• Left sidebar can be collapsed and expanded.

External filesystems

• Add a network drive (e.g. SFTP) and navigate into it.
• Plug in a USB drive; able to mount, browse, and eject.

Integrations

• Desktop icons display as expected
• Drag-and-drop into Firefox works