tag 53212 notabug close 53212 stop On 1/12/22 17:59, Joachim Wagner wrote: > Not sure whether this is coreutils or kernel. Maybe both. > > A filesystem's device number such as reported by `stat` can be derived from > major and minor of the underlying block device, e.g. xfs, or be allocated at > mount time, e.g. btrfs. Even in the former case, the device number can change > between restarts, e.g. when multiple dm-crypt devices are created in > different > order. Changing device numbers cause trouble for applications that use the > device number to identify a filesystem across restarts, e.g. KDE's baloo file > indexer. > > A mount option to specify the device number would fix this trouble without > requiring applications to move to alternative ways of identifying > filesystems, > e.g. based on UUIDs. This option could be general, i.e. the device number can > be set for any filesystem, including those that normally derive it from major > and minor of their block device(s). > > The implementation would probably be simplified if the specified device > numbers must come from a reserved pool. Otherwise, care must be taken that > the > numbers do not collide with automatically assigned device numbers, including > those allocated later. > > Replaces bug #53209 > > References: > https://bugs.kde.org/show_bug.cgi?id=402154 > https://bugs.kde.org/show_bug.cgi?id=404057 > https://bugs.kde.org/show_bug.cgi?id=413694 > https://unix.stackexchange.com/questions/345220/btrfs-how-to-get-real-device-id > https://stackoverflow.com/questions/4309882/device-number-in-stat-command-output/4309947
mount is a command from the util-linux package, hence you'd be better off asking on their mailing list <util-li...@vger.kernel.org>. FWIW: mount already knows quite a list of alternatives how to specify the source device: mount --help | sed -n '/^Source:/,/^$/p' Source: -L, --label <label> synonym for LABEL=<label> -U, --uuid <uuid> synonym for UUID=<uuid> LABEL=<label> specifies device by filesystem label UUID=<uuid> specifies device by filesystem UUID PARTLABEL=<label> specifies device by partition label PARTUUID=<uuid> specifies device by partition UUID ID=<id> specifies device by udev hardware ID <device> specifies device by path <directory> mountpoint for bind mounts (see --bind/rbind) <file> regular file for loopdev setup As this is not related to coreutils, I'm hereby closing this issue in our bug tracker. Have a nice day, Berny
