fs: implement fstat ...

fstat is useful to get information about an already opened file. Add
it to barebox.

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

fs: Store the path in struct filep ...

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

fs: do not lookup global FILE * when the file is already available ...

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

fs: store pointer to fsdev instead of dev in struct filep ...

The struct device_d * in struct filep is never of interest, instead
it is always converted to a struct fs_device_d *, so simplify the code
by storing the struct fs_device_d * directly.

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

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

Conflicts:
	arch/arm/dts/Makefile
	common/Makefile
	lib/Makefile

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

Conflicts:
	.gitignore
	Makefile
	drivers/serial/Makefile

move file helper functions to separate file ...

We have our file helper functions in several places. Move them
all to lib/libfile.c.
With this we no longer have file helpers in fs/fs.c which contains
the core fs functions and no functions in lib/libbb.c which are
not from busybox.

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

fs: ext4: le32_to_cpu() used on a 16-bit field ...

From U-Boot commit:

| commit 8b415f7
| Author: Rommel Custodio <sessyargc+uboot@gmail.com>
| Date:   Sun Jul 21 10:53:25 2013 +0200
|
|     ext4fs: le32_to_cpu() used on a 16-bit field
|
|     Fix reading ext4_extent_header struture on BE machines.  Some 16 bit
|     fields where converted to 32 bit fields, due to the byte swap on BE
|     machines the containing value was corrupted. Therefore reading ext4
|     filesystems on BE machines where broken before.
|
|     Signed-off-by: Rommel Custodio <sessyargc+uboot@gmail.com>
|     [sent via git-send-email; rework commit message]
|     Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
|     Reviewed-by: Simon Glass <sjg@chromium.org>
|     Tested-by: Simon Glass <sjg@chromium.org>
|     Tested-by: Lukasz Majewski <l.majewski@samsung.com>

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

fs: ext4: use EXT2_BLOCK_SIZE instead of fs->blksz ...

From U-Boot commit:

| commit 4701732
| Author: Ionut Nicu <ioan.nicu.ext@nsn.com>
| Date:   Mon Jan 13 11:59:24 2014 +0100
|
|     ext4fs: use EXT2_BLOCK_SIZE instead of fs->blksz
|
|     Using fs->blksz in ext4fs_get_extent_block() is not
|     correct since fs->blksz is not initialized on the
|     read path. Use EXT2_BLOCK_SIZE() instead which will
|     produce the desired output.
|
|     Signed-off-by: Ionut Nicu <ioan.nicu.ext@nsn.com>
|     Signed-off-by: Mathias Rulf <mathias.rulf@nsn.com>

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

fs: ext4: fix "invalid extent block" error ...

From U-Boot commit:

| commit b5bbac1
| Author: Ionut Nicu <ioan.nicu.ext@nsn.com>
| Date:   Mon Jan 13 12:00:08 2014 +0100
|
|     ext4fs: fix "invalid extent block" error
|
|     For files where we actually have extent indexes following
|     an extent header (ext_block->eh_depth != 0), the do/while
|     loop from ext4fs_get_extent_block() does not select the
|     proper extent index structure.
|
|     For example, if we have:
|
|     ext_block->eh_depth = 1
|     ext_block->eh_entries = 1
|     fileblock = 0
|     index[0].ei_block = 0
|
|     the do/while loop will exit with i set to 0 and the
|     ext4fs_get_extent_block() function will return 0, even if
|     there was a valid extent index structure following the
|     header.
|
|     Signed-off-by: Ionut Nicu <ioan.nicu.ext@nsn.com>
|     Signed-off-by: Mathias Rulf <mathias.rulf@nsn.com>

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

fs: implement EFI variable filesystem driver ...

This implements a filesystem for accessing EFI variables.
It is compatible to the Linux Kernel efivarfs filesystem.
Currently the variables can only be accessed readonly.

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

fs: implement EFI filesystem driver ...

This implements a filesystem driver which uses the EFI Simple File
System Protocol to provide files from EFI to barebox.

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

fat: Use correct format specifier ...

Use %zd to print size_t arguments.

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

automount: check for recursive automount ...

automount_mount calls run_command which may trigger an automount
again. This results in an endless loop. A simple way to trigger
this is:

mkdir /x; automount /x false; cd /x; something

Use a static variable to detect if we are currently in automount_mount()
and bail out if we are.

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

drop CONFIG_PARTITION_NEED_MTD ...

With CONFIG_PARTITION_NEED_MTD enabled we use mtd rather than devfs
directly to create partitions on mtd devices. Since:

| commit b32cd8d
| Author: Sascha Hauer <s.hauer@pengutronix.de>
| Date:   Wed Apr 9 15:49:32 2014 +0200
|
|     mtd: nand: bb: use mtd api directly
|
|     The devfs layer just adds an addition indirection between mtd
|     and the bb devices with no purpose. Drop it.
|
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The bad block aware device creation doesn't work if this option
is disabled. With this we remove CONFIG_PARTITION_NEED_MTD and always
use mtd partitions on mtd devices.

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

tftp: add timeframe when remote server is retransmitting ...

If there's packet loss and the remote server needs to retransmit,
there is falsely no timeframe left because TIMEOUT (server wait time)
and TFTP_TIMEOUT (abort timer) are the same.

This patch increases TFTP_TIMEOUT.

See RFC2349 for more info: http://tools.ietf.org/html/rfc2349

Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ubifs: Remove unused variable ...

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

devfs-core: return new cdev also for mtd partitions ...

__devfs_add_partition returns the newly created cdev, but in case
of mtd partitions it accidently returns 0. Fix this.

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

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

Conflicts:
	drivers/mtd/ubi/cdev.c

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

Conflicts:
	fs/devfs-core.c

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

Conflicts:
	defaultenv/defaultenv-2-base/bin/ifup

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

Conflicts:
	drivers/mtd/core.c
	net/eth.c

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

Conflicts:
	common/environment.c

run_command: remove unused flag parameter ...

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

fs: ubifs: rework logging ...

By default UBIFS is very verbose. Decrease the verbosity, turn
printf messages into ubifs_ messages and add device parameters
for the values which are not printed anymore.

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

fs: ubifs: Fix unused function warning ...

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

devfs: partitioning: add new helper devfs_create_partitions ...

Compared to devfs_add_partition which adds a single partition
devfs_create_partitions creates several partitions at once. One nice
benefit is that this simplifies appending partitions because the start
of the latter partition doesn't need to be specified explicitly.
Also dev_add_bb_dev() is called by the new helper if the bbname is
specified for a partition.

Note that adding partitions is also more flexible now (also via
devfs_add_partition) because negative values for offset and size now
have a proper meaning instead of creating broken partitions.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs_add_partition: make flags parameter unsigned ...

The value is only used to assign to a (*struct cdev)->flags which is an
unsigned int and it is passed as fourth parameter of mtd_add_partition which
is an unsigned long.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: partitioning: add missing free in error path ...

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: tftp: Fix writing files to tftp ...

Copying files to tftp 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>

Since this commit copy_file passes O_TRUNC to open(). This results in the
fs layer calling fsdrv->truncate. tftp returns -ENOSYS here and open returns
with an error. To fix this return 0 for the truncate callback in tftp. Also
enforce the O_TRUNC flag when opening a file for writing on tftp as the files
are always truncated on tftp anyway.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported-by: andreas.willig@rafi.de