linux-stable.git/drivers/mtd/ubi/cdev.c, branch v3.15

UBI: rename block device ioctls

2014-03-05T13:49:15+00:00

Rename the UBI_IOCVOLATTBLK and UBI_IOCVOLDETBLK to UBI_IOCVOLCRBLK and
UBI_IOCVOLRMBLK, because we do not use terms "attach" and "detach" for the R/O
block devices on top of UBI volumes. Instead, we use terms "create" and
"remove". This patch also amends the related commentaries.

Signed-off-by: Artem Bityutskiy 
Acked-by: Ezequiel Garcia

UBI: block: do not use term "attach"

2014-03-04T11:52:33+00:00

We already use term attach/detach for UBI->MTD relations, let's not use this
for UBI->ubiblock relations to avoid confusion. Just use 'create' and 'remove'
instead. E.g., "create a R/O block device on top of a UBI volume".

Signed-off-by: Artem Bityutskiy

UBI: R/O block driver on top of UBI volumes

2014-02-28T14:29:48+00:00

This commit introduces read-only block device emulation on top of UBI volumes.

Given UBI takes care of wear leveling and bad block management it's possible
to add a thin layer to enable block device access to UBI volumes.
This allows to use a block-oriented filesystem on a flash device.

The UBI block devices are meant to be used in conjunction with any
regular, block-oriented file system (e.g. ext4), although it's primarily
targeted at read-only file systems, such as squashfs.

Block devices are created upon user request through new ioctls:
UBI_IOCVOLATTBLK to attach and UBI_IOCVOLDETBLK to detach.
Also, a new UBI module parameter is added 'ubi.block'. This parameter is
needed in order to attach a block device on boot-up time, allowing to
mount the rootfs on a ubiblock device.
For instance, you could have these kernel parameters:

  ubi.mtd=5 ubi.block=0,0 root=/dev/ubiblock0_0

Or, if you compile ubi as a module:

  $ modprobe ubi mtd=/dev/mtd5 block=/dev/ubi0_0

Artem: amend commentaries and massage the patch a little bit.

Signed-off-by: Ezequiel Garcia 
Signed-off-by: Artem Bityutskiy

ubi/cdev: switch to fixed_size_llseek()

2013-06-29T08:57:49+00:00

Signed-off-by: Al Viro

new helper: file_inode(file)

2013-02-23T04:31:31+00:00

Signed-off-by: Al Viro

UBI: print less

2012-09-04T06:39:02+00:00

UBI currently prints a lot of information when it mounts a volume, which
bothers some people. Make it less chatty - print only important information
by default.

Get rid of 'dbg_msg()' macro completely.

Reported-by: Uwe Kleine-König 
Signed-off-by: Artem Bityutskiy

UBI: comply with coding style

2012-09-04T06:39:01+00:00

Join all the split printk lines in order to stop checkpatch complaining.

Signed-off-by: Artem Bityutskiy

UBI: add max_beb_per1024 to attach ioctl

2012-09-04T06:39:01+00:00

This patch provides a possibility to set the "maximum expected number of
bad blocks per 1024 blocks" (max_beb_per1024) for each mtd device using
the UBI_IOCATT ioctl.

Signed-off-by: Richard Genoud 
Signed-off-by: Artem Bityutskiy

UBI: prepare for max_beb_per1024 module parameter addition

2012-09-04T06:39:01+00:00

This patch prepare the way for the addition of max_beb_per1024 module
parameter.  There's no functional change.

Signed-off-by: Richard Genoud 
Reviewed-by: Shmulik Ladkani 
Signed-off-by: Artem Bityutskiy

UBI: fix spelling of detach in debug output

2012-07-18T07:13:41+00:00

Signed-off-by: Peter Meerwald 
Signed-off-by: Artem Bityutskiy