Documentation/usb/mass-storage.rst

9   appearing to the host as a disk or a CD-ROM drive.  It supports
12   to read-only, and gadget can indicate that it is removable and/or
13   CD-ROM (the latter implies read-only access).
15   Its requirements are modest; only a bulk-in and a bulk-out endpoint
17   Support is included for full-speed, high-speed and SuperSpeed
20   Note that the driver is slightly non-portable in that it assumes
21   a single memory/DMA buffer will be usable for bulk-in and bulk-out
38   - file=filename[,filename...]
42     FSG_MAX_LUNS (8) LUNs set.  If more files are specified, they will
53     simulating CD-ROM, block size of the device if the backing file is
56   - removable=b[,b...]
66     specified by userspace on the device (see “sysfs entries”
70     must be specified for it with the “file” parameter as the module
79     “n” needs to be specified now.
82     ejected or removed (as is true for a CD-ROM drive or a card
85     “hot-unpluggable”.
87   - cdrom=b[,b...]
90     CD-ROM.  The default is false.
92   - ro=b[,b...]
102     The default value for non-CD-ROM logical units is false; for
103     logical units simulating CD-ROM it is forced to true.
105   - nofua=b[,b...]
123   - luns=N
129     If this parameter is provided, and the number of files specified
134     be deduced from the number of files specified in the “file”
138   - stall=b
148   - idVendor      -- USB Vendor ID (16 bit integer)
149   - idProduct     -- USB Product ID (16 bit integer)
150   - bcdDevice     -- USB Device version (BCD) (16 bit integer)
151   - iManufacturer -- USB Manufacturer string (string)
152   - iProduct      -- USB Product string (string)
153   - iSerialNumber -- SerialNumber string (string)
161   - file
169     not specified as removable (but that may look strange to the
171     with the Prevent-Allow Medium Removal SCSI command.
173   - ro
179   - nofua
184   - forced_eject
188     it.  The content doesn't matter, any non-zero number of bytes