fs tftp: depend on NET, not on NET_TFTP ...

The tftp filesystem support is by no means dependent on the old tftp
support, it depends on NET though.

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

fs/tftp: depend on NET_TFTP ...

else the option remains selected when network gets disabled

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

complete: add delpart complete support ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Merge branch 'work/dns' into next

automount: remove existing automountpoint ...

Before creating a new mountpoint on an already existing mountpoint
we have to remove it.

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

fs tftp: use resolv to resolv ip address ...

instead of assuming the backingstore is a ip address, use resolv()
to make it possible to pass in a hostname.

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

automount: Pass automount pass as environment variable ...

This makes it possible to pass a command sequence to the automount
command instead of only a script (a command sequence would get confused
by the additional argument)

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

FAT: Fix error path ...

- forward the return value of chk_mounted to detect whether mount succeeded
- free resources on mount failure

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

fs open: pass error from stat ...

We used to simply answer with -ENOENT in open() when the
initial call to stat() failed. Instead, forward the error from
stat().

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

Add automount support ...

This patch adds an automount command which makes it possible
to execute a script when a certain directory is first accessed.
It's the commands responsibility to make this directory available
(bringing devices up and mounting it). This results in automount
support which makes sure that from the shell every file can
be accessed without having to care for device bringup. Bringing
up devices may be expensive (USB, dhcp). The automount support
makes it easy for the environment to bringup devices when they
are actually needed.

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

fs: drop struct mtab_entry ...

every struct fs_device_d contains a struct mtab_entry, so they
have a 1:1 relationship. Instead of having to use container_of
to get from a struct mtab_entry to a struct fs_device_d we can
better embed the members of struct mtab_entry into struct fs_device_d
directly.

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

fs: change get_fs_device_by_path prototype ...

get_fs_device_by_path returns a struct device_d instead of what the
name suggests a struct fs_device_d. Also it returns the rootpath
of the corresponding fs_device. This patch changes the name of
this function to get_fs_device_and_root_path to better reflect what
the function does and changes the return type to struct fs_device_d.

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

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>