fs: get fs device using container_of ...

This reduces the usage of dev->type_data.

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

fs: get fs driver using container_of ...

This reduces the usage of dev->type_data.

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

Add suport for tftp as a filesystem ...

This adds tftp filesystem support. It currently duplicates
significant amounts of the tftp (command) support. This is ok
since we can eventually drop the original tftp command later.

tftp is not really suitable to be handled as a filesystem. It lacks
support for stat, reading directories and other things. Handling
it as a filesystem has one big advantage though: tftp is no special
case for boot scripts and/or commands anymore which makes them simpler.

This implementation has some improvements to the original tftp command.
It supports blocksize negotiation which speeds up transfers if the tftp
server supports it. Also we can determine the filesize to transfer if
the remote end supports it.

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

Merge branch 'pu/device-cleanup' into next

fs: allow to mount on subdirectories ...

Since get_mtab_entry_by_path() is a bit more flexible now
we no longer have to force the user to mount on the root
directory only. Instead, we can allow to mount on subdirectories
aswell. Nested mounts are still not possible though.

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

fs: put fs devices on its own bus ...

By putting the fs devices/drivers on a bus on its own we can hook
into the bus remove function to cleanup the fs device. This way
we can unmount a device by simply unregistering the device which
is useful for for example USB mass storage devices. These can now
unregister the assoiated filesystems by unregistering their child
devices.

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

fs: remove fs devices list ...

We store the fs devices in a list only because we want to
check if the fs driver needs a backingstore or not. The
driver will bail out anyway if it needs a backingstore and
doesn't find one. So we can remove this check and thus remove
the list of fs devices.

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

fs: remove only once used variable ...

dev is used only once, so make the code a tiny bit simpler by
not using an extra variable but dereference it when needed directly.

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

fs: simplify get_mtab_entry_by_path ...

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

fs: remove unused function fsdev_get_mountpoint ...

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

fs: Store mtab path in allocated string ...

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

fs: make locally used function get_mtab_entry_by_path static ...

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

fs: Store mtab entries in list ...

To make the code a bit easier to read. Also, do not allow
to umount / when something else is mounted.

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

fat: revert fat caching mechanism ...

There seems to be a bug in this mechanism. It's easy to
get the cached fat out of sync with the device. Revert
it for now. This includes a huge write performance drop.

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

devfs-code: fix warning ...

/opt/work/barebox/fs/devfs-core.c: In function 'partition_ioctl':
/opt/work/barebox/fs/devfs-core.c27: warning: unused variable 'reg'

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

ioctl: add support for ECCGETSTATS and MEMGETREGIONINFO ...

Support added for ioctl of ECCGETSTATS and MEMGETREGIONINFO.

Fix default handling in core.c to return -EINVAL, if request
was unknown.

Signed-off-by: Alexander Aring <a.aring@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fat fs: Fix compile warning ...

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

cdev: pass flags to open function ...

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

Merge branch 'pu/cramfs-fix' into next

ramfs: increase chunk size to 8192 bytes ...

dlmalloc seems to work more efficient with this chunk size.
Copying a bigger file (3MB) takes 271ms vs. 125ms on a i.MX27
board. Even bigger chunk sizes do not further improve performance.

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

fix cramfs support broken since zlib update ...

cramfs does not compile since we updated zlib to the kernel
version. Fix this by using the kernel version of uncompress.c

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

Merge branch 'master' into next ...

Conflicts:
	drivers/ata/disk_drive.c

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

Create a unique cdev number for on demand devices ...

For disk like devices attached to MCI, ATA or USB it depends on the order they
will be recognized. So an unique number for all disk like devices is required.

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

fs/fat: Initialize local variable finfo ...

fat_stat in fs/fat.c declares finfo but doesn't initialize it.
When get_fileinfo is called, fno->lfname and fno->lfsize are
tested but haven't been zeroed...This can lead to a wrong
behavior.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mount: Fix the printing of device name ...

Mount without argument always print a "none" as device name mounted
because entry->parent_device is always NULL.

The problem is the mount function in fs/fs.c. parent_device is
initialized to NULL and never updated. With this patch,
parent_device is set with the mounted device name.

Moreover, the mount function has been modified to print the device
name plus device id using the dev_name function.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: read: do not call read op when count is 0 ...

Some ops do not handle read with count = 0 correctly. They do
not have to if this is catched in the upper layer.

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

fix bug introduced with fixing path_check_prereq() ...

This fixes a bug introduced with:

commit 74c3632
Author: Antony Pavlov <antonynpavlov@gmail.com>
Date:   Tue Oct 18 13:48:44 2011 +0400

    fs: fix path_check_prereq()

    This patch makes impossible the situations than path_check_prereq() can make
    'return 0' without changing errno.

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

path_check_prereq is supposed to return 0 when a file does
not exist and S_UB_DOES_NOT_EXIST is given. stat() changes
errno, so we have to set errno back to 0 before returning.

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

fs: fix chdir() ...

chdir() allocates memory using mormalise_path(). But if path_check_prereq()
returns error than memory isn't freed.

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

fs: fix path_check_prereq() ...

This patch makes impossible the situations than path_check_prereq() can make
'return 0' without changing errno.

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

Merge branch 'next'