Hi, I would like to ask a few questions about the Linux USB Gadget project, more specifically about the mass storage gadget itself. Currently it is possible to emulate a CD reader with an iso image file, which works okay, and has been around for some time. My use-case would be to use a Raspberry PI Zero, to emulate an optical drive through an iso file and boot a desktop machine with it. Unfortunately I also noticed that there were attempts a number of years ago to contribute support for DVD reader emulation, but unfortunately those efforts did not get into the mainline kernel. To be more specific I am referring to these: http://linuxehacking.ovh/2013/07/12/how-to-emulatore-dvd-rom-hardware-usb/ https://lkml.org/lkml/2015/3/7/388 In an effort to explore the possibilities, I took Tiziano Bacocco's patch (the first of the two) and ported it (in a trivial way) to the current Raspberry PI kernel versions (both 4.19.118 and 5.4.44) and compiled the kernel and modules. The code compiled cleanly after a few minor changes, but when I tried to use it on an 11 GB CentOS iso image, the module crashed. I would need some help and guidance to resolve any of the possible issues, and hopefully to make DVD-ROM emulation finally a thing in the mass storage gadget. I can add further details later on if there will be anyone interested. Also, if this is not the correct forum to ask questions about the Linux USB Gadget codebase, then please let me know also. Thank you! Best Regards, János Szigetvári -- Janos SZIGETVARI RHCE, License no. 150-053-692 LinkedIn: linkedin.com/in/janosszigetvari __@__˚V˚ Make the switch to open (source) applications, protocols, formats now: - windows -> Linux, iexplore -> Firefox, msoffice -> LibreOffice - msn -> jabber protocol (Pidgin, Google Talk) - mp3 -> ogg, wmv -> ogg, jpg -> png, doc/xls/ppt -> odt/ods/odp
