464 lines
16 KiB
Plaintext
464 lines
16 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Block device driver configuration
|
|
#
|
|
|
|
menuconfig BLK_DEV
|
|
bool "Block devices"
|
|
depends on BLOCK
|
|
default y
|
|
help
|
|
Say Y here to get to see options for various different block device
|
|
drivers. This option alone does not add any kernel code.
|
|
|
|
If you say N, all options in this submenu will be skipped and disabled;
|
|
only do this if you know what you are doing.
|
|
|
|
if BLK_DEV
|
|
|
|
config BLK_DEV_NULL_BLK
|
|
tristate "Null test block driver"
|
|
select CONFIGFS_FS
|
|
|
|
config BLK_DEV_NULL_BLK_FAULT_INJECTION
|
|
bool "Support fault injection for Null test block driver"
|
|
depends on BLK_DEV_NULL_BLK && FAULT_INJECTION
|
|
|
|
config BLK_DEV_FD
|
|
tristate "Normal floppy disk support"
|
|
depends on ARCH_MAY_HAVE_PC_FDC
|
|
help
|
|
If you want to use the floppy disk drive(s) of your PC under Linux,
|
|
say Y. Information about this driver, especially important for IBM
|
|
Thinkpad users, is contained in
|
|
<file:Documentation/admin-guide/blockdev/floppy.rst>.
|
|
That file also contains the location of the Floppy driver FAQ as
|
|
well as location of the fdutils package used to configure additional
|
|
parameters of the driver at run time.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called floppy.
|
|
|
|
config AMIGA_FLOPPY
|
|
tristate "Amiga floppy support"
|
|
depends on AMIGA
|
|
|
|
config ATARI_FLOPPY
|
|
tristate "Atari floppy support"
|
|
depends on ATARI
|
|
|
|
config MAC_FLOPPY
|
|
tristate "Support for PowerMac floppy"
|
|
depends on PPC_PMAC && !PPC_PMAC64
|
|
help
|
|
If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
|
|
floppy controller, say Y here. Most commonly found in PowerMacs.
|
|
|
|
config BLK_DEV_SWIM
|
|
tristate "Support for SWIM Macintosh floppy"
|
|
depends on M68K && MAC
|
|
help
|
|
You should select this option if you want floppy support
|
|
and you don't have a II, IIfx, Q900, Q950 or AV series.
|
|
|
|
config AMIGA_Z2RAM
|
|
tristate "Amiga Zorro II ramdisk support"
|
|
depends on ZORRO
|
|
help
|
|
This enables support for using Chip RAM and Zorro II RAM as a
|
|
ramdisk or as a swap partition. Say Y if you want to include this
|
|
driver in the kernel.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called z2ram.
|
|
|
|
config CDROM
|
|
tristate
|
|
select BLK_SCSI_REQUEST
|
|
|
|
config GDROM
|
|
tristate "SEGA Dreamcast GD-ROM drive"
|
|
depends on SH_DREAMCAST
|
|
select CDROM
|
|
help
|
|
A standard SEGA Dreamcast comes with a modified CD ROM drive called a
|
|
"GD-ROM" by SEGA to signify it is capable of reading special disks
|
|
with up to 1 GB of data. This drive will also read standard CD ROM
|
|
disks. Select this option to access any disks in your GD ROM drive.
|
|
Most users will want to say "Y" here.
|
|
You can also build this as a module which will be called gdrom.
|
|
|
|
config PARIDE
|
|
tristate "Parallel port IDE device support"
|
|
depends on PARPORT_PC
|
|
help
|
|
There are many external CD-ROM and disk devices that connect through
|
|
your computer's parallel port. Most of them are actually IDE devices
|
|
using a parallel port IDE adapter. This option enables the PARIDE
|
|
subsystem which contains drivers for many of these external drives.
|
|
Read <file:Documentation/admin-guide/blockdev/paride.rst> for more information.
|
|
|
|
If you have said Y to the "Parallel-port support" configuration
|
|
option, you may share a single port between your printer and other
|
|
parallel port devices. Answer Y to build PARIDE support into your
|
|
kernel, or M if you would like to build it as a loadable module. If
|
|
your parallel port support is in a loadable module, you must build
|
|
PARIDE as a module. If you built PARIDE support into your kernel,
|
|
you may still build the individual protocol modules and high-level
|
|
drivers as loadable modules. If you build this support as a module,
|
|
it will be called paride.
|
|
|
|
To use the PARIDE support, you must say Y or M here and also to at
|
|
least one high-level driver (e.g. "Parallel port IDE disks",
|
|
"Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
|
|
to at least one protocol driver (e.g. "ATEN EH-100 protocol",
|
|
"MicroSolutions backpack protocol", "DataStor Commuter protocol"
|
|
etc.).
|
|
|
|
source "drivers/block/paride/Kconfig"
|
|
|
|
source "drivers/block/mtip32xx/Kconfig"
|
|
|
|
source "drivers/block/zram/Kconfig"
|
|
|
|
config BLK_DEV_UMEM
|
|
tristate "Micro Memory MM5415 Battery Backed RAM support"
|
|
depends on PCI
|
|
help
|
|
Saying Y here will include support for the MM5415 family of
|
|
battery backed (Non-volatile) RAM cards.
|
|
<http://www.umem.com/>
|
|
|
|
The cards appear as block devices that can be partitioned into
|
|
as many as 15 partitions.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called umem.
|
|
|
|
The umem driver has not yet been allocated a MAJOR number, so
|
|
one is chosen dynamically.
|
|
|
|
config BLK_DEV_UBD
|
|
bool "Virtual block device"
|
|
depends on UML
|
|
help
|
|
The User-Mode Linux port includes a driver called UBD which will let
|
|
you access arbitrary files on the host computer as block devices.
|
|
Unless you know that you do not need such virtual block devices say
|
|
Y here.
|
|
|
|
config BLK_DEV_UBD_SYNC
|
|
bool "Always do synchronous disk IO for UBD"
|
|
depends on BLK_DEV_UBD
|
|
help
|
|
Writes to the virtual block device are not immediately written to the
|
|
host's disk; this may cause problems if, for example, the User-Mode
|
|
Linux 'Virtual Machine' uses a journalling filesystem and the host
|
|
computer crashes.
|
|
|
|
Synchronous operation (i.e. always writing data to the host's disk
|
|
immediately) is configurable on a per-UBD basis by using a special
|
|
kernel command line option. Alternatively, you can say Y here to
|
|
turn on synchronous operation by default for all block devices.
|
|
|
|
If you're running a journalling file system (like reiserfs, for
|
|
example) in your virtual machine, you will want to say Y here. If
|
|
you care for the safety of the data in your virtual machine, Y is a
|
|
wise choice too. In all other cases (for example, if you're just
|
|
playing around with User-Mode Linux) you can choose N.
|
|
|
|
config BLK_DEV_COW_COMMON
|
|
bool
|
|
default BLK_DEV_UBD
|
|
|
|
config BLK_DEV_LOOP
|
|
tristate "Loopback device support"
|
|
help
|
|
Saying Y here will allow you to use a regular file as a block
|
|
device; you can then create a file system on that block device and
|
|
mount it just as you would mount other block devices such as hard
|
|
drive partitions, CD-ROM drives or floppy drives. The loop devices
|
|
are block special device files with major number 7 and typically
|
|
called /dev/loop0, /dev/loop1 etc.
|
|
|
|
This is useful if you want to check an ISO 9660 file system before
|
|
burning the CD, or if you want to use floppy images without first
|
|
writing them to floppy. Furthermore, some Linux distributions avoid
|
|
the need for a dedicated Linux partition by keeping their complete
|
|
root file system inside a DOS FAT file using this loop device
|
|
driver.
|
|
|
|
To use the loop device, you need the losetup utility, found in the
|
|
util-linux package, see
|
|
<https://www.kernel.org/pub/linux/utils/util-linux/>.
|
|
|
|
The loop device driver can also be used to "hide" a file system in
|
|
a disk partition, floppy, or regular file, either using encryption
|
|
(scrambling the data) or steganography (hiding the data in the low
|
|
bits of, say, a sound file). This is also safe if the file resides
|
|
on a remote file server.
|
|
|
|
There are several ways of encrypting disks. Some of these require
|
|
kernel patches. The vanilla kernel offers the cryptoloop option
|
|
and a Device Mapper target (which is superior, as it supports all
|
|
file systems). If you want to use the cryptoloop, say Y to both
|
|
LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12
|
|
or later) version of util-linux. Additionally, be aware that
|
|
the cryptoloop is not safe for storing journaled filesystems.
|
|
|
|
Note that this loop device has nothing to do with the loopback
|
|
device used for network connections from the machine to itself.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called loop.
|
|
|
|
Most users will answer N here.
|
|
|
|
config BLK_DEV_LOOP_MIN_COUNT
|
|
int "Number of loop devices to pre-create at init time"
|
|
depends on BLK_DEV_LOOP
|
|
default 8
|
|
help
|
|
Static number of loop devices to be unconditionally pre-created
|
|
at init time.
|
|
|
|
This default value can be overwritten on the kernel command
|
|
line or with module-parameter loop.max_loop.
|
|
|
|
The historic default is 8. If a late 2011 version of losetup(8)
|
|
is used, it can be set to 0, since needed loop devices can be
|
|
dynamically allocated with the /dev/loop-control interface.
|
|
|
|
config BLK_DEV_CRYPTOLOOP
|
|
tristate "Cryptoloop Support"
|
|
select CRYPTO
|
|
select CRYPTO_CBC
|
|
depends on BLK_DEV_LOOP
|
|
help
|
|
Say Y here if you want to be able to use the ciphers that are
|
|
provided by the CryptoAPI as loop transformation. This might be
|
|
used as hard disk encryption.
|
|
|
|
WARNING: This device is not safe for journaled file systems like
|
|
ext3 or Reiserfs. Please use the Device Mapper crypto module
|
|
instead, which can be configured to be on-disk compatible with the
|
|
cryptoloop device.
|
|
|
|
source "drivers/block/drbd/Kconfig"
|
|
|
|
config BLK_DEV_NBD
|
|
tristate "Network block device support"
|
|
depends on NET
|
|
help
|
|
Saying Y here will allow your computer to be a client for network
|
|
block devices, i.e. it will be able to use block devices exported by
|
|
servers (mount file systems on them etc.). Communication between
|
|
client and server works over TCP/IP networking, but to the client
|
|
program this is hidden: it looks like a regular local file access to
|
|
a block device special file such as /dev/nd0.
|
|
|
|
Network block devices also allows you to run a block-device in
|
|
userland (making server and client physically the same computer,
|
|
communicating using the loopback network device).
|
|
|
|
Read <file:Documentation/admin-guide/blockdev/nbd.rst> for more information,
|
|
especially about where to find the server code, which runs in user
|
|
space and does not need special kernel support.
|
|
|
|
Note that this has nothing to do with the network file systems NFS
|
|
or Coda; you can say N here even if you intend to use NFS or Coda.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called nbd.
|
|
|
|
If unsure, say N.
|
|
|
|
config BLK_DEV_SKD
|
|
tristate "STEC S1120 Block Driver"
|
|
depends on PCI
|
|
depends on 64BIT
|
|
help
|
|
Saying Y or M here will enable support for the
|
|
STEC, Inc. S1120 PCIe SSD.
|
|
|
|
Use device /dev/skd$N amd /dev/skd$Np$M.
|
|
|
|
config BLK_DEV_SX8
|
|
tristate "Promise SATA SX8 support"
|
|
depends on PCI
|
|
help
|
|
Saying Y or M here will enable support for the
|
|
Promise SATA SX8 controllers.
|
|
|
|
Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
|
|
|
|
config BLK_DEV_RAM
|
|
tristate "RAM block device support"
|
|
help
|
|
Saying Y here will allow you to use a portion of your RAM memory as
|
|
a block device, so that you can make file systems on it, read and
|
|
write to it and do all the other things that you can do with normal
|
|
block devices (such as hard drives). It is usually used to load and
|
|
store a copy of a minimal root file system off of a floppy into RAM
|
|
during the initial install of Linux.
|
|
|
|
Note that the kernel command line option "ramdisk=XX" is now obsolete.
|
|
For details, read <file:Documentation/admin-guide/blockdev/ramdisk.rst>.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called brd. An alias "rd" has been defined
|
|
for historical reasons.
|
|
|
|
Most normal users won't need the RAM disk functionality, and can
|
|
thus say N here.
|
|
|
|
config BLK_DEV_RAM_COUNT
|
|
int "Default number of RAM disks"
|
|
default "16"
|
|
depends on BLK_DEV_RAM
|
|
help
|
|
The default value is 16 RAM disks. Change this if you know what you
|
|
are doing. If you boot from a filesystem that needs to be extracted
|
|
in memory, you will need at least one RAM disk (e.g. root on cramfs).
|
|
|
|
config BLK_DEV_RAM_SIZE
|
|
int "Default RAM disk size (kbytes)"
|
|
depends on BLK_DEV_RAM
|
|
default "4096"
|
|
help
|
|
The default value is 4096 kilobytes. Only change this if you know
|
|
what you are doing.
|
|
|
|
config CDROM_PKTCDVD
|
|
tristate "Packet writing on CD/DVD media (DEPRECATED)"
|
|
depends on !UML
|
|
select CDROM
|
|
select BLK_SCSI_REQUEST
|
|
help
|
|
Note: This driver is deprecated and will be removed from the
|
|
kernel in the near future!
|
|
|
|
If you have a CDROM/DVD drive that supports packet writing, say
|
|
Y to include support. It should work with any MMC/Mt Fuji
|
|
compliant ATAPI or SCSI drive, which is just about any newer
|
|
DVD/CD writer.
|
|
|
|
Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs
|
|
is possible.
|
|
DVD-RW disks must be in restricted overwrite mode.
|
|
|
|
See the file <file:Documentation/cdrom/packet-writing.rst>
|
|
for further information on the use of this driver.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called pktcdvd.
|
|
|
|
config CDROM_PKTCDVD_BUFFERS
|
|
int "Free buffers for data gathering"
|
|
depends on CDROM_PKTCDVD
|
|
default "8"
|
|
help
|
|
This controls the maximum number of active concurrent packets. More
|
|
concurrent packets can increase write performance, but also require
|
|
more memory. Each concurrent packet will require approximately 64Kb
|
|
of non-swappable kernel memory, memory which will be allocated when
|
|
a disc is opened for writing.
|
|
|
|
config CDROM_PKTCDVD_WCACHE
|
|
bool "Enable write caching"
|
|
depends on CDROM_PKTCDVD
|
|
help
|
|
If enabled, write caching will be set for the CD-R/W device. For now
|
|
this option is dangerous unless the CD-RW media is known good, as we
|
|
don't do deferred write error handling yet.
|
|
|
|
config ATA_OVER_ETH
|
|
tristate "ATA over Ethernet support"
|
|
depends on NET
|
|
help
|
|
This driver provides Support for ATA over Ethernet block
|
|
devices like the Coraid EtherDrive (R) Storage Blade.
|
|
|
|
config SUNVDC
|
|
tristate "Sun Virtual Disk Client support"
|
|
depends on SUN_LDOMS
|
|
help
|
|
Support for virtual disk devices as a client under Sun
|
|
Logical Domains.
|
|
|
|
source "drivers/s390/block/Kconfig"
|
|
|
|
config XILINX_SYSACE
|
|
tristate "Xilinx SystemACE support"
|
|
depends on 4xx || MICROBLAZE
|
|
help
|
|
Include support for the Xilinx SystemACE CompactFlash interface
|
|
|
|
config XEN_BLKDEV_FRONTEND
|
|
tristate "Xen virtual block device support"
|
|
depends on XEN
|
|
default y
|
|
select XEN_XENBUS_FRONTEND
|
|
help
|
|
This driver implements the front-end of the Xen virtual
|
|
block device driver. It communicates with a back-end driver
|
|
in another domain which drives the actual block device.
|
|
|
|
config XEN_BLKDEV_BACKEND
|
|
tristate "Xen block-device backend driver"
|
|
depends on XEN_BACKEND
|
|
help
|
|
The block-device backend driver allows the kernel to export its
|
|
block devices to other guests via a high-performance shared-memory
|
|
interface.
|
|
|
|
The corresponding Linux frontend driver is enabled by the
|
|
CONFIG_XEN_BLKDEV_FRONTEND configuration option.
|
|
|
|
The backend driver attaches itself to a any block device specified
|
|
in the XenBus configuration. There are no limits to what the block
|
|
device as long as it has a major and minor.
|
|
|
|
If you are compiling a kernel to run in a Xen block backend driver
|
|
domain (often this is domain 0) you should say Y here. To
|
|
compile this driver as a module, chose M here: the module
|
|
will be called xen-blkback.
|
|
|
|
|
|
config VIRTIO_BLK
|
|
tristate "Virtio block driver"
|
|
depends on VIRTIO
|
|
help
|
|
This is the virtual block driver for virtio. It can be used with
|
|
QEMU based VMMs (like KVM or Xen). Say Y or M.
|
|
|
|
config BLK_DEV_RBD
|
|
tristate "Rados block device (RBD)"
|
|
depends on INET && BLOCK
|
|
select CEPH_LIB
|
|
select LIBCRC32C
|
|
select CRYPTO_AES
|
|
select CRYPTO
|
|
help
|
|
Say Y here if you want include the Rados block device, which stripes
|
|
a block device over objects stored in the Ceph distributed object
|
|
store.
|
|
|
|
More information at http://ceph.newdream.net/.
|
|
|
|
If unsure, say N.
|
|
|
|
config BLK_DEV_RSXX
|
|
tristate "IBM Flash Adapter 900GB Full Height PCIe Device Driver"
|
|
depends on PCI
|
|
help
|
|
Device driver for IBM's high speed PCIe SSD
|
|
storage device: Flash Adapter 900GB Full Height.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called rsxx.
|
|
|
|
source "drivers/block/rnbd/Kconfig"
|
|
|
|
endif # BLK_DEV
|