linuxdebug/Documentation/ABI/testing/configfs-usb-gadget-mass-st...

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What: /config/usb-gadget/gadget/functions/mass_storage.name
Date: Oct 2013
KernelVersion: 3.13
Description:
The attributes:
=========== ==============================================
stall Set to permit function to halt bulk endpoints.
Disabled on some USB devices known not to work
correctly. You should set it to true.
num_buffers Number of pipeline buffers. Valid numbers
are 2..4. Available only if
CONFIG_USB_GADGET_DEBUG_FILES is set.
=========== ==============================================
What: /config/usb-gadget/gadget/functions/mass_storage.name/lun.name
Date: Oct 2013
KernelVersion: 3.13
Description:
The attributes:
============ ==============================================
file The path to the backing file for the LUN.
Required if LUN is not marked as removable.
ro Flag specifying access to the LUN shall be
read-only. This is implied if CD-ROM emulation
is enabled as well as when it was impossible
to open "filename" in R/W mode.
removable Flag specifying that LUN shall be indicated as
being removable.
cdrom Flag specifying that LUN shall be reported as
being a CD-ROM.
nofua Flag specifying that FUA flag
in SCSI WRITE(10,12)
forced_eject This write-only file is useful only when
the function is active. It causes the backing
file to be forcibly detached from the LUN,
regardless of whether the host has allowed it.
Any non-zero number of bytes written will
result in ejection.
============ ==============================================