fs tftp: Fix possible fifo overflow ...

In tftp_read we send a request for a new packet without checking if we
have enough space in the FIFO. This can lead to a FIFO overflow and a
corrupt file. Add a check for it.

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

fs tftp: Only request a block once ...

tftp_send is called often. Each time, when in STATE_RDATA, a packet
is requested from the tftp server, even if we requested the same packet
already.
Stop this by tracking which packet we requested.

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

devfs-core: add writesize in mtd partition ioctl ...

Add writesize in mtd partition MEMGETINFO ioctl.

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

Merge branch 'for-next/remove-fsf-address' ...

Conflicts:
	drivers/net/miidev.c
	include/miidev.h

Merge branch 'for-next/fat-detection'

Merge branch 'for-next/driver'

driver: register bus ...

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

fs/fat: Handle MBR on the first sector ...

Use filetype to detect FAT boot sector.
Add support for disk with MBR on the first sector.

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

Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

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

fs: fs.c fix cast ...

Fix casting on min argument, to avoid warnings on 64bit build.

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

fs/nfs: fix read when size < 1024 ...

Currently we always request 1024.

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

Merge branch 'for-next/link'

nfs: add readlink support ...

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

ramfs: add symlink and readlink support ...

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

fs: introduce get_mounted_path to get the path where a file is mounted ...

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

fs: open: add symlink support ...

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

fs: implement stat ...

stat() stats the file pointed to by path and fills in buf.

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

fs: add symlink support ...

Limit it's support to existing file only

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

fs: rename stat to lstat as we implement lstat ...

For compatibility put a inline on lstat for stat until we have the symlink
support.

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

fs: fix rmdir with symlink ...

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

fs: add readlink support ...

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

fs/fat: add filetype ...

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

fs/mount: add autodetection type support ...

if NULL is pass as type mount will try to autodetect the filesystem type

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

fs nfs: depend on net ...

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

fs: fix standard zero, full devices ...

The standard devices are currently broken since they have
the size ~0. As now files use loff_t as file size which is a signed
type the read implementation gets confused and now returns -1.

The current implementation also has the (somewhat theorical) problem
that we do not have real streaming devices, so /dev/zero went out
of zeroes after reading 4GB (or now LLONG_MAX).

This patch introduces a new cdev flag DEVFS_IS_CHARACTER_DEV and a new
file size flag FILE_SIZE_STREAM which makes it possible to create
real stream devices instead.

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

Merge branch 'for-next/resource-size' ...

Conflicts:
	drivers/base/resource.c
	fs/fs.c

Merge branch 'for-next/fs'

Merge branch 'for-next/sparse'

Merge branch 'for-next/misc'

resource: store 'end' instead of 'size' in struct resource ...

Storing the size instead of the resource end in struct resource was
a mistake. 'size' ranges from 0 to UINT[32|64]_MAX + 1 which obviously
leads to problems. 'end' on the other hand will never exceed
UINT[32|64]_MAX. Also this way we can express a iomem region covering
the whole address space.

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