mtd: Add subpagesize to mtd_info_user ...

ubiformat needs the subpagesize to work correctly. The kernel uses
sysfs to pass the subpagesize, but in barebox we have the possibility
to extend struct mtd_info_user. Add a corresponding field and use it
in ubiformat.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Fix endless loop in automount code ...

A chdir to a path registered as an automount path followed by a 'ls'
results in an endless loop. This happens because the command the
automounter executes results in another automount request.
Fix this by running the automounter from the chdir code before
the cwd is actually changed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: Add function to get cdev by mountpath ...

This is useful to know for the bootloader spec implementation.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ubifs: Remove redundant assignment ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: ignore O_TRUNC open flag for devices ...

The O_TRUNC flag has to be ignored when opening devices. Otherwise
cp /somefile /dev/somedev fails. This is broken since:

| commit d4f5bb1
| Author: Sascha Hauer <s.hauer@pengutronix.de>
| Date:   Sat Sep 28 13:12:50 2013 +0200
|
|     copy_file: Add missing O_TRUNC
|
|     Without it, when copying a smaller file over a larger file the
|     resulting file still has the remaining space from the larger file.
|
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/mount'

Merge branch 'for-next/fs' ...

Conflicts:
	fs/Kconfig
	fs/Makefile

fs: add BPKFS support ...

Simple update file format developed for Somfy, tools and library are
available under LGPLv2 (https://www.gitorious.org/libbpk).

This format in the v1.0 allow you to store 6 types a binary stream for
a unique hardware id:
 - bootloader
 - bootloader_version
 - description.gz
 - kernel
 - rootfs
 - firmware_version

and you can easly add more binary stream type.

The fs will display you in a directory per hw id

and if a binary stream type is unknown will be display
as unknown_%08x

 # mount image.bpk /tmp
 # ls -l /tmp/hw_id_0/
-rwxrwxrwx         10 firmware_version
-rwxrwxrwx          8 firmware_version.crc
-rwxrwxrwx    1845968 kernel
-rwxrwxrwx          8 kernel.crc
-rwxrwxrwx    5062656 rootfs
-rwxrwxrwx          8 rootfs.crc
-rwxrwxrwx        248 bootloader
-rwxrwxrwx          8 bootloader.crc
-rwxrwxrwx     248925 description.gz
-rwxrwxrwx          8 description.gz.crc
-rwxrwxrwx          4 bootloader_version
-rwxrwxrwx          8 bootloader_version.crc
-rwxrwxrwx          4 unknown_1234567g
-rwxrwxrwx          8 unknown_1234567g.crc

Why BPK and not CPIO or uImage

1) CPIO

cpio does not handle > 4GiB image and does not have any crc checksum

2) uImage

uImage only provide one crc32 for the all data part and only a list of binary
stream with no information about what is what (in multi-image format)

3) BPK

BPK provide a crc32 for the header part and one crc32 per binary stream
so if you does not care of some data you are not force to check them

And you known exactly the binary stream type and for which hw to
use it.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Fargier Sylvain <sylvain.fargier@somfy.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: add cdev mount helpers ...

Introduce helpers to iterate over cdevs and mount them to a known
path.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: use bus_for_each_driver ...

Instead of using for_each_driver and testing for the bus type.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: cleanup backingstore handling ...

All filesystem drivers which need a backingstore device do the same
ignoring of '/dev/' in the backingstore followed by a cdev_open. Add a
helper function for it and let the core handle the cdev. As a side
effect this makes sure that fsdev->cdev is also set when a device is
mounted without the leading '/dev/' which was previously ignored
by the mount code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: add uimagefs ...

this will provide the image data and information via file

 # ls -l /tmp/
-rwxrwxrwx          3 arch
-rwxrwxrwx         12 compression
-rwxrwxrwx         16 name
-rwxrwxrwx          5 os
-rwxrwxrwx         24 time
-rwxrwxrwx         12 type
-rwxrwxrwx         10 load_addr
-rwxrwxrwx         10 entry_point
-rwxrwxrwx    2199875 data0
-rwxrwxrwx    2199875 data
-rwxrwxrwx         10 data.crc

if it's multi image

 # ls -l /tmp-multi/
-rwxrwxrwx          3 arch
-rwxrwxrwx         12 compression
-rwxrwxrwx         16 name
-rwxrwxrwx          5 os
-rwxrwxrwx         24 time
-rwxrwxrwx         16 type
-rwxrwxrwx         10 load_addr
-rwxrwxrwx         10 entry_point
-rwxrwxrwx       1292 data0
-rwxrwxrwx        983 data1
-rwxrwxrwx       2287 data
-rwxrwxrwx         10 data.crc

you can get the image header via an ioctl on any file
UIMAGEFS_METADATA

if you want to check the crc do

 # crc32 -f /tmp-multi/data -V /tmp-multi/data.crc
CRC32 for /tmp-multi/data 0x00000000 ... 0x000008ee ==> 0x88d5a0db

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Fix lseek on fat filesystems. ...

FILE object was not updated properly when seeking.

Signed-off-by: Fargier Sylvain <sylvain.fargier@somfy.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

fs: tftp: don't duplicate timeout information ...

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: Add ubifs support ...

This adds ubifs support from u-boot-2013.07. This is taken
mostly as-is, only the necessary adjustments to attach to the
barebox fs layer have been made.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cdev: add device_find_partition ...

device_find_partition allows to find a partition of a device with
a particular name.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cdev: allow to open a struct cdev ...

cdev_open() opens a cdev by name. This introduces cdev_do_open which
allows to open a cdev when the cdev is already found by other means.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cdev: introduce partition names ...

currently most partition cdevs have the name <devname>.<partname>
This makes it hard to find a partition by <partname>. This introduces
a partname field in struct cdev so that.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: let devfs_add_partition return the new partition ...

Useful for unregistering later or for adding addional flags.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

read_file: Make it work on tftp servers which do not pass size ...

Some tftp servers (for example netkit-tftp) do not pass the filesize.
Add a workaround for read_file which reads the file into a temporary
file which then is copied to a buffer.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/pr_print'

fs: allocate FILE table dynamically ...

Some systems are runnignfrom a very limited SRAM, but have a huge
malloc space in SDRAM. The bss normally is in SRAM, so we should
avoid having big structures there. The FILE table is 5120 bytes
big, so allocate it dynamically instead.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ext4: switch debug and printf to dev_xxx ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: add pread and pwrite functions ...

Add pread and pwrite functions.

Split read and write functions to save some space.
The functions pread and pwrite saves and sets the file
position to a given offset and restore them afterwards.

This also makes the nandtest command use these function
which is necessary to not break compilation for the nandtest
command.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: fix return type of read ...

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/oftree' ...

Conflicts:
	drivers/of/base.c

Merge branch 'for-next/misc'

treewide: fix format specifiers ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

tftp: reset timer on progress ...

When during tftp receive operation a ACK packet can't successfully be sent
the timer was resetted directly after send resulting in a deadlock.

This patch changes the timer reset operation in a way that it is only resetted
when the actually is progress, namely in the TFTP_ACK/TFTP_DATA pathes in the
tftp handler.

Reported-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Antony Pavlov <antonynpavlov@gmail.com>