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kevinveenbirkenbachandClaude Opus 5
faf34de774
losetup -f prints the device with a trailing (lost) marker when its node is missing, and both claim sites fed the whole string to mknod. The recovery path that materialises /dev/loop8 and beyond therefore never worked, which is why the pool appeared to stop at the eight preallocated nodes even though max_loop is 0. Strip the marker before the node is built. Nothing released the data-root loop a node claims, so each distro round leaked four of them: across 140 job logs leg 1 always applies 5 and declines 0, leg 2 applies 3 and declines 2, leg 3 declines 4. The declining nodes fall back to overlayfs, which disables the btrfs snapshot mode the script exists to exercise, and the DR drill then finds no device at all. Detach right after the mount instead. The mount holds the opener, so the kernel arms autoclear rather than detaching, and the loop plus its sparse image are reclaimed when the node container takes its mount namespace down. Verified in a privileged container: the mount survives the detach, AUTOCLEAR reads 1, the filesystem stays writable, btrfs subvolume create still works, and the loop is released on umount. Drop the teardown block added earlier: it filtered on (lost), which marks a missing device node rather than a missing backing file, so it selected exactly the devices losetup -d cannot detach, ran unprivileged, and printed success unconditionally. Restore the (deleted) filter in the drill. Require mountpoint up front so a missing tool declines instead of killing the node. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>