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...]
53     simulating CD-ROM, block size of the device if the backing file is
56   - removable=b[,b...]
59     removable.  “b” here is either “y”, “Y” or “1” for true or “n”,
69     If a logical unit is not removable (the default), a backing file
81     Note that “removable” means the logical unit's media can be
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...]
110     MS Windows mounts removable storage in “Removal optimised mode” by
123   - luns=N
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
165     logical unit is removable), the content is empty.
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
229   1. In FSG the “removable” and “cdrom” module parameters set the flag