xfs: Node xattrs

- Implemented node based extended attributes support

- Both Versions of xfs node based extended attributes can be read now

Change-Id: I2d2915029435e7722cf463b1e2b5579b361dd592
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5606
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

xfs: leaf xattrs

- Implemented leaf based extended attributes on-disk headers

- Both version 4 and version 5 attributes can be read now

- Implemented all leaf headers check to ensure metadata integrity

Change-Id: Ifc3f2e433e991776bb02d1d38f621d5bd1554a4e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5600
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

xfs: Symbolic links support

- Necessary hooks for reading symlinks are implemented

- Added support for local symlinks

- Added support for extent based symlinks

- This patch completes #17791

Change-Id: If6847974562b21f751097df357326f4643eff757
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5621
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

xfs: extended attributes necessary hooks and shortform attributes support

- Implemented all necessary hooks for extended attributes in kernel_interface.cpp

- Implemented an abstract class attribute which will act as an interface between all forms of extended attributes in xfs

- An attempt to read shortform extended attributes

Change-Id: Icff9329b790f9fcfc0b078f61059795af9d9e486
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5570
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

xfs : version 5 superblock, checksum header file

- Implemented version 5 superblock fields and necessary macros.

- Checksum functions are implemented which will be used for crc verification and crc updates.

- fssh_kernal_priv.h ROUNDDOWN macro definition is consistent with kernal.h definition.

Change-Id: I49b7c939bfd3ea1bffc85b3db42bc678dcce75cd
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5350
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

xfs: B+Tree ExtentMap reading

We can now read all the extent maps from the leaves. This will be needed
to implement the GetNext() functionality.

Change-Id: Ie10b453c33bec6e6d3109743d695f86a90de45cd
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3119
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: Reading Node Directories

Node directories can now be read. With this, extent directories are
complete.
Change-Id: Ic42c8464e810137cff4946e8c975edc121daaa4f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3045
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: Attempt at reading Leaf Directories

We can read leaf directories now but I've only checked for a single
block working right now. I might make a few more changes in an upcoming
patch.

Change-Id: I325de8a6fad4ef9298e7810256cba47a87c45187
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3027
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: An attempt to read block directories

Map entries can be read, most structures are in place. Next is to
actually work with the directory block.

Change-Id: I700ee2e003bdef97838b1f06a95e53a5e4293658
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2981
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: An attempt at reading shortform dir

This patch gets read_dir, lookup and few others to work. Entries cannot
be listed yet except the root.

Change-Id: Ic4b7b61a794a1b75849e45777a383b3315b15aa8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2915
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: Reading Inodes

This patch successfully reads inodes. There are also some style fixes.
The inodes aren't published and some useful hooks are yet to implement.

Change-Id: I73e6c68f1c2177871fbd0b241a67826aea1b17be
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2738
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Move DeviceOpener class to a separate file.

It is used by several of the filesystems, so it seems a good idea to
move it to the shared/ directory.

UFS2, BFS, XFS, EXT2 and EXFAT are adjusted.

Change-Id: I493e37a1e7d3ae24251469f82befd985a3c1dbdd
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2489
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Adding superblock, types, xfs_mount and volume

Superblock work is done. A valid superblock is now detected.
xfs_shell will fail though, because the filesystem does not own it's
root node.

Change-Id: I78e3c21c4d0dd8e535fd24df4a0c107ed5fb201c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2286
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Making of xfs file system

xfs_shell is modeled over bfs_shell.
It fails to mount the filesystem as expected
(the filesystem code isn't implemented).

Change-Id: Iaf88c1f4aef338f249fdc58bc27a3ad76ebd5d95
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2096
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>