Merge branch 'for-next/misc'

Merge branch 'for-next/dts'

fs: add cdev_create_loop and cdev_remove_loop for loop mount option ...

Allow to create a loopback cdev from a file.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Fixed up with:

fs: Makefile: Add parseopt to all builds

parseopt.h was included to fs.c with commit 9248b, but parseopt.o has a
dependency to CONFIG_FS_NFS.

Moved parseopt.o to the default build to eliminate build failures.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: Makefile: Add parseopt to all builds ...

parseopt.h was included to fs.c with commit 9248b, but parseopt.o has a
dependency to CONFIG_FS_NFS.

Moved parseopt.o to the default build to eliminate build failures.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: add parseopt_b for loop mount option ...

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fixup! fs: Implement links to directories

fs: Implement links to directories ...

So far links can only point to files. Implement links to
directories. With this all kinds of links are supported:

- relative links
- absolute links
- links including ".."
- link loops (are detected, return -EMLINK)

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

fs: drop path_check_prereq() ...

path_check_prereq() has some bugs:

- It's called with S_IFLNK, but this is effectively a no-op because this
  case is not implemented in the function
- It uses lstat, but if stat or lstat should be used depends on the
  usecase: For opendir() stat() must be used, since we are not
  interested in the link, but in the target. For readlink() lstat() must
  be used since we are indeed interested in the link, not the target.

It's easier and better understandable to open code the functionality
where it's needed, so drop path_check_prereq() and do the right thing
where called.

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

fs: Create automount entries for the default mount pathes ...

In barebox the default mount path for a cdev is /mnt/<cdevname>
which can be mounted with "mount <cdevname>" without specifying
a target path explicitly. Simplify this further by creating automount
entries for the default mount pathes which makes a manual mount
completely unnecessary.

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

fs: squashfs: fix "no previous prototype for 'squashfs_set_rootarg'" warning ...

The patch fixes this compiler's warning:

  fs/squashfs/squashfs.c:115:6: warning: no previous prototype for 'squashfs_set_rootarg' [-Wmissing-prototypes]
   void squashfs_set_rootarg(struct squashfs_priv *priv, struct fs_device_d *fsdev)
        ^

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

Merge branch 'for-next/ofpart'

fs: devfs-core: replace DEVFS_IS_PARTITION flag with pointer to the master cdev ...

Instead of having a flag indicating a cdev is a partition on
some master cdev, just add a master pointer to the cdev, so
that we can also find out who the master is.

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

fs: devfs-core: remove unused code ...

Partitions on mtd devices are implemented as mtd devices themselves
which have a ioctl hook. The DEVFS_IS_PARTITION flag is never set
for these devices, so the partition offset translation code in
fs/devfs-core.c is unused. Remove it.

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

cdev: Collect partitions on list ...

We currently do not have a way to iterate over all partitions of
a cdev. Change this.

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

ext4: Use correct descriptor size when reading the block group descriptor ...

This is an adoption of the U-Boot commit

| commit f798b1d
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date:   Sat Sep 17 02:10:09 2016 +0200
|
|     ext4: Use correct descriptor size when reading the block group descriptor
|
|     The correct descriptor size must be used when calculating offsets, and
|     also to read the correct amount of data.
|
|     Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>

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

ext4: determine group descriptor size for 64bit feature ...

This is an adoption of the U-Boot commits

| commit fc214ef
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date:   Sat Sep 17 02:10:07 2016 +0200
|
|     ext4: determine group descriptor size for 64bit feature
|
|     If EXT4_FEATURE_INCOMPAT_64BIT is set, the descriptor can be read from
|     the superblocks, otherwise it defaults to 32.
|
|     Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>

| commit 3cc5bbb
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date:   Tue Dec 27 02:35:08 2016 +0100
|
|     fs/ext4: Initialize group descriptor size for revision level 0 filesystems
|
|     genext2fs creates revision level 0 filesystems, which are not readable
|     by u-boot due to the initialized group descriptor size field.
|     f798b1d
|
|     Reported-by: Kever Yang <kever.yang@rock-chips.com>
|     Reported-by: FrostyBytes@protonmail.com
|     Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
|     Tested-by: Kever Yang <kever.yang@rock-chips.com>

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

ext4: Update ext2/3/4 superblock, group descriptor and inode structures ...

This is an adoption of the U-Boot commit

| commit 3ee2f97
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date:   Sat Sep 17 02:10:06 2016 +0200
|
|     ext4: Update ext2/3/4 superblock, group descriptor and inode structures
|
|     Most importantly, the superblock provides the used group descriptor size,
|     which is required for the EXT4_FEATURE_INCOMPAT_64BIT.
|
|     Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>

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

ext4: fix wrong usage of le32_to_cpu() ...

This is an adoption of the U-Boot commit

| commit 011bc33
| Author: Michael Walle <michael@walle.cc>
| Date:   Mon Aug 29 10:46:46 2016 +0200
|
|     ext4: fix wrong usage of le32_to_cpu()
|
|     le32_to_cpu() must only convert the revision_level and not the boolean
|     result.
|
|     Signed-off-by: Michael Walle <michael@walle.cc>

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

ext4: drop unused and misdefined INODE_SIZE_FILESYSTEM macro ...

Nota bene sblock.inode_size actually has __le16 type.

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

ext4: use kernel names for byte swaps ...

This is an adoption of the U-Boot commit

| commit 7f101be
| Author: Michael Walle <michael@walle.cc>
| Date:   Mon Aug 29 10:46:44 2016 +0200
|
|     ext4: use kernel names for byte swaps
|
|     Instead of __{be,le}{16,32}_to_cpu use {be,le}{16,32}_to_cpu.
|
|     Signed-off-by: Michael Walle <michael@walle.cc>

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

ext4: change structure fields to __le/__be types ...

This is an adoption of the U-Boot commit

| commit 2a0b7a9
| Author: Michael Walle <michael@walle.cc>
| Date:   Mon Aug 29 10:46:43 2016 +0200
|
|     ext4: change structure fields to __le/__be types
|
|     Change all the types of ext2/4 fields to little endian types and all the
|     JBD fields to big endian types. Now we can use sparse (make C=1) to check
|     for statements where we need byteswaps.
|
|     Signed-off-by: Michael Walle <michael@walle.cc>

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

Merge branch 'for-next/misc'

tftp: implement forward seeking ...

Just abuse tftp_read to step forward.

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

tftp: trivial code simplification ...

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

lseek: tighten error checking and allow negative offsets for SEEK_END ...

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

lseek: ensure errno is set on failure and return -1 ...

All error paths before calling the driver's lseek callback return -1 and
set errno. Do the same if the callback returns an error.

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

efi: move x86 efi boot support to x86 arch ...

prepare to drop the efi arch as efi boot up is not arch sepecific

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

efi: move bus driver to driver/efi ...

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

fs: Remove O_TRUNC check for devices when open files ...

Don't check for the file type here. Devices may have truncate
callbacks. Otherwise the caller should check if O_TRUNC is possible.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: Add optional truncate callback for device files ...

Not all device files have trivial fix device sizes like static
ubi volumes. Here the device file size equals the image size it contains.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>