diff options
Diffstat (limited to 'Documentation/ABI/testing/configfs-usb-gadget-mass-storage')
| -rw-r--r-- | Documentation/ABI/testing/configfs-usb-gadget-mass-storage | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/Documentation/ABI/testing/configfs-usb-gadget-mass-storage b/Documentation/ABI/testing/configfs-usb-gadget-mass-storage index 9931fb0d63ba..fc0328069267 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-mass-storage +++ b/Documentation/ABI/testing/configfs-usb-gadget-mass-storage @@ -4,12 +4,14 @@ KernelVersion: 3.13 Description: The attributes: - stall - Set to permit function to halt bulk endpoints. + =========== ============================================== + 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 + 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 @@ -17,15 +19,23 @@ KernelVersion: 3.13 Description: The attributes: - file - The path to the backing file for the LUN. + ============ ============================================== + 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 + 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 + removable Flag specifying that LUN shall be indicated as being removable. - cdrom - Flag specifying that LUN shall be reported as + cdrom Flag specifying that LUN shall be reported as being a CD-ROM. - nofua - Flag specifying that FUA flag + 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. + ============ ============================================== |