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Maxim Devaev 421c8d9a20 usb: gadget: f_mass_storage: forced_eject attribute
It allows to reset prevent_medium_removal flag and "eject" the image.
This can be useful to free the drive from a hunging host or if the host
continues to use the drive even after unmounting (Linux does this).
It's also a bit like using an unfolded paperclip on an optical drive.

Previously, the undocumented method of sending SIGUSR1 to a special
"file-storage" kernel thread could be used for these purposes,
but when using multiple storages there was no way to distinguish
one from the other, so we had to send a signal to everyone.

Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Maxim Devaev <mdevaev@gmail.com>
Link: https://lore.kernel.org/r/20220711102956.19642-1-mdevaev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-07-14 16:06:42 +02:00
arch Linux 5.19-rc4 2022-06-27 10:03:28 +02:00
block
certs
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Documentation usb: gadget: f_mass_storage: forced_eject attribute 2022-07-14 16:06:42 +02:00
drivers usb: gadget: f_mass_storage: forced_eject attribute 2022-07-14 16:06:42 +02:00
fs
include usb: misc: Add onboard_usb_hub driver 2022-07-08 14:53:50 +02:00
init
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kernel
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tools tools: usb: testusb: Add super-plus speed reporting 2022-07-08 14:54:49 +02:00
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MAINTAINERS usb: misc: Add onboard_usb_hub driver 2022-07-08 14:53:50 +02:00
Makefile Linux 5.19-rc4 2022-06-26 14:22:10 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.