userlandfs: Disable use of the file cache in FUSE for now.

It still needs more work, it appears.

Fixes #18746.

userlandfs: Make DoIO handle IO smaller than the request size properly.

When _InternalIO returns with "bytes" smaller than the
original request, this isn't an error (or something we
should retry), but just something we need to pass on.

Fixes part of #18746. However, even after this commit,
file reads don't work quite right: reading past the end
of a file returns errors instead of just no data.

userlandfs: Support mapping FUSE files to memory

- Create a file cache for FUSE mounted files on open to allow
memory mapping these files unless direct_io is specified.
- Implement DoIO for FUSE mounted files.

This patch enables files mounted through FUSE filesystems such as
sshfs or vmhgfs to be `mmap`ed, allowing remotely cross-compiled
executables to be directly run on Haiku.

Change-Id: I364b8225eae5b1d586280c2b3301fb661581caed
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6277
Tested-by: Automation <automation@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

userlandfs: Fix GetVNodeName

- VNode names are now allowed to have a length of 1. This is
common for Windows drives mounted through a shared filesystem.
- Empty VNode names are now checked from the userland side,
preventing the kernel driver to reject and not ACK a false
B_OK from the userland server.

Change-Id: If0a6fcea1387367d1492c9b94c62c03e381ce1c1
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6276
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Automation <automation@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

userlandfs: implement get_fs_info using ioctl

This avoids introducing an entirely custom hook in FUSE.
It uses the ioctl hook in an unconventional way (calling it with no
valid fuse_file_info) but this can be fixed if a filesystem requires it
(by opening a file handle on /, doing the ioctl, then closing again).

An updated version of fusesmb-haiku is available and confirmed working:
https://github.com/haikuarchives/fusesmb-haiku

Change-Id: If1268113874363fa035e5340be75e9f5198216d6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5199
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

userlandfs_fuse_lowlevel: fix opening directories in Tracker

- It is possible to call open() on a directory, but FUSE lowlevel
filesystems don't implement that and expect it to be re-routed to the
opendir call. BRoster uses this to read the dir/file attributes to
identify it, so it could not identify directories properly.
- In ReadDir, make sure to not return more entries than asked, as this
confuses the userlandfs protocol communication (the kernel does not
acknowledge the readdir reply, and then the server hits an assert when
receiving the next request instead of the ack).

Change-Id: I9c4e9a3f0fc6e9879d4cfbc0d5402a4733d2218a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5482
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

userlandfs-fuse: improve fuse_ll_readdir

The previous implementation needed a temporary buffer to store entries
and then sent them to the actual readdir buffer. This is now fixed, the
actual buffer is filled directly.

Also fixes problems with reading the same directory multiple times, and
reading large directories.

Change-Id: I8dc9677ee676144547d17f313a7f2d91fd2bca05
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5480
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

userlandfs: compatibility with FUSE 2.9 and FUSE lowlevel API

- Import latest version of files from FUSE 2.9.9 (our last
synchronization was with 2.7.4)
- Adjust fuse pkgconfig file to use the POSIX error mapper
automatically, since that's required for all FUSE software
- Implement the lowlevel API in addition to the highlevel one. The
lowlevel API uses inode numbers to identify files, rather than paths,
making it a better fit to the userlandfs architecture.

The FUSE 2.x branch is not maintained anymore by FUSE developers,
however, pretty much no one migrated to FUSE 3.x. So it is more
interesting to implement, rather than 3.x.

Confirmed still working with sshfs and curlftpfs.

Example use:

I tested this with github.com/whoozle/android-file-transfer-linux

- Build the fuse library and copy it to ~/config/non-packaged/add-ons/userlandfs/
- Start the server: /system/servers/userlandfs_server aft-mtp-mount
- Connect your Android phone and put it in USB file transfer mode
- Mount the device: mount -t userlandfs -p 'aft-mtp-mount /boot/home/MyPhone -d -o use_ino' ~/MyPhone
- You can now access your phone data

Change-Id: Ic3efda7ffbc33737e6f4958428fb3ec9939ef105
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5198
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Adjust all struct dirent creations (again), this time to use offsetof().

The dirent struct is not packed, so offsetof(dirent, d_name) != sizeof(dirent).
Thus in order not to waste the alignment bytes (which are significant,
on x86_64 at least, sizeof(dirent)==32, but offsetof(...)=26.)

This is also the most portable way to handle things, and should
work just fine in cross-platform code that has a non-zero-sized d_name.

FUSEVolume: Add a ROUNDUP() macro and use it.

No functional change intended, but this should make the code
easier to read.

file_systems & Tracker: Do not assume sizeof(dirent) contains 1 byte for the name.

At present, it does, but that is an oddity we have preserved from BeOS
that the next commit is going to remove. (This commit thus wastes 1 byte
without the following one.)

Most changes are pretty straightforward: only a +1 is needed,
and a few removed from sizing calculations. Some filesystems like UDF
originally passed back the length with the \0 included, so they have
been adjusted further. UFS2 had some other sizing problems which are also
corrected in this commit.

userlandfs/server/fuse: Fix PVS V773

Fix FUSEVolume::OpenAttr() was exited
without releasing the 'cookie' pointer.

Change-Id: I8bf08268c77e1c9704227b1d4c7c94ddcc8b09a3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2947
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

userlandfs/server/fuse: Fix potential memory leak

* Fix potential leak of 'cookie' at line 2206, which is allocated
at line 2203. Pointed out by Clang Static Analyzer.
* Add NULL check to 'cookie'.

Change-Id: Ibfdbe3a52ceb0d29adf1acca51fb7b27d2c532f3
Reviewed-on: https://review.haiku-os.org/c/1065
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

FUSE compat: add MIME type faking

* Add special handling for reading the BEOS:TYPE attribute to supply
on-the-fly fake MIME types for FUSE module filesystems, the same
way it's done in our FAT and NTFS FS modules

* Reuse the mime_ext_table which we already have and put it into a
shared location so we don't get further extra copies of it

FUSE compat: add support for attribute reading

* Implement reading extended file attributes in FUSE modules,
using getxattr()

getxattr() is a quite limited API, not allowing to specify a read
offset. So we read in the entire attribute value into a buffer and
store in the cookie. This shouldn't be a problem memory-wise, since
xattr implementions usually have limitations regarding attribute size
anyway, so it'll rarely be more than a few kilobytes.

* Writing, renaming, and removing attributes is not yet implemented

FUSE compat: fall back to truncate if no ftruncate

* As defined by the FUSE interface: if the FUSE module doesn't
implement ftruncate(), fall back to using truncate() instead

FUSE compat: fill in some stat infos for getattr

* Prefill struct stat with some information which the FUSE module
doesn't necessarily fill in

FUSE compat: add Haiku extension

* Add a way for a FUSE module to supply Haiku-specific extensions.
This allows it to integrate better with Haiku while only requiring
minimal changes on the FUSE module itself.

* For now, there is only one extension: another function pointer for
"get_fs_info", which lets the FUSE module fill in an fs_info struct.
FUSE provides no good way to otherwise communicate extra information,
such as the volume flags (e.g. B_FS_IS_SHARED).

* A FUSE module can signal that it supports the Haiku extensions by
a) defining HAS_HAIKU_FUSE_EXTENSIONS before including the fuse
headers
b) setting the global variable gHasHaikuFuseExtensions to 1 in
its initialization
Otherwise, the Haiku extensions are completely invisible to the
FUSE module.

userlandfs: Fix 64 bit debug build.

UserlandFS: Make 64 bit clean and enable build for x86_64.

I did not bother to fix the BeOS kernel emulation, so this part is
still left out of the x86_64 build.

Fixed warning.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34145 a95241bf-73f2-0310-859d-f6bbb57e9c96

* For every request to userland we also send the team/thread/user/group ID of
the current thread, now. Implemented by introducing a new base class
KernelRequest which has respective attributes.
* Server: RequestThreadContext does now also save the request that is being
processed. Furthermore some space has been reserved for file system specific
data, which can be initialized by the new
FileSystem::InitRequestThreadContext().
* FUSE library: Implemented fuse_get_context() using the new
RequestThreadContext feature.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29872 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Initialize fuse_config before parsing the arguments.
* Implemented fuse_is_lib_option() more correctly.
* Actually use the value of the "use_ino" option.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29871 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed double-lock in RemoveDir() spotted by Stippi.
* Added node monitoring support. For the changes we make at least. Changes made
by other peer in network file systems are not recognized.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29749 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed WriteFSInfo(). It's used only for changing the volume name and we
can't implement that with the FUSE interface.
* We now mark nodes dirty after a write operation.
* Implemented Sync() by fsync()ing all dirty nodes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29746 a95241bf-73f2-0310-859d-f6bbb57e9c96

Make gcc 4 happy.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29742 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed incorrect loop check in _UnlockNodeChainInternal() nothing would ever
be unlocked.
* Fixed incorrect array indexing in _FindCommonAncestor().
* Fixed copy and paste bugs in _LockNodeChainsInternal().
* Added MultiNodeLocker class, a RAII frontend for _{Lock,Unlock}NodeChains().
* Implemented entry renaming and hard linking.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29741 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Refactored node locking methods. There's now a LockIterator class which helps
with locking.
* Implemented methods for locking two directories. It's a bit complex, since
we need to enforce a global locking order on the node tree to avoid
deadlocks. Untested yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29738 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed the asynchronous I/O methods. We won't implement them for the time
being.
* Introduced locking for FileCookie.
* Implemented SetFlags() and FSync().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29736 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented WriteStat() (backend for chown(), chmod(), utime(), truncate()).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29722 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed the fs_vnode_ops::create_dir() parameter for returning the ID of the
newly created dir. The VFS really doesn't need it and for some file systems
it might not be easy to get by. Several file systems (e.g. rootfs and fat)
were ignoring the parameter anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29719 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for symlink and directory creation, as well as entry deletion
(directories and other nodes).
* Removed methods we can't possibly implement, since the FUSE interface doesn't
provide them and we can't emulate them.
* A FUSEEntry does now also own a reference to its parent directory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29715 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added support for O_TRUNC, file creation, and writing to files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29689 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Preparations for write support: Added a locking to the existing hooks. We
need to make sure that the paths of nodes don't change while we're meddling
with them. We read-lock the directories up to the root directory for that
purpose.
* Added missing locking for directory and attribute directory cookies.
We have to do that, since concurrent readdir()s on the same dir handle are
possible and we write-access the cookie data in such a case.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29687 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented the attribute directory methods. Untested yet -- sshfs doesn't
support the respective xattr hooks.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29656 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented ReadSymlink() and Access().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29655 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Got rid of from_fuse_error(). The client FS hooks are supposed to return
negative error codes now (e.g. using the new error mapping mechanism). This
is necessary since the read() and write() hooks have to return a size or a
negative error code.
* Implemented Read(). We can now read sshfs files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29654 a95241bf-73f2-0310-859d-f6bbb57e9c96

A non-empty volume name looks much better in Tracker.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29635 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed the directory filler callbacks. It is possible that it is passed a NULL
struct stat (new callback) or a 0 type. So if we don't have a node type, we
need to stat the node.
* Added simple opening/closing of files (no reading/writing yet).

It's now possible to browse sshfs volumes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29634 a95241bf-73f2-0310-859d-f6bbb57e9c96

As per the documentation of the statfs() hook, some statvfs members are
ignored. So we must not use them.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29624 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for the zero offset method for the readdir() hook's filler
callback.
* Added support for the deprecated getdir() hook.
* Fixed various bugs.

Listing the root directory with sshfs does now work. For subdirectories
stat()ing the entries seems to fail, which might be due to the yet missing
open() support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29623 a95241bf-73f2-0310-859d-f6bbb57e9c96

* More work on the file system initialization. Mounting/unmounting works now
with sshfs.
* Added basic node and entry management, which we need, since the FUSE
interface works with paths only, while our VFS plays with node IDs and
node cookies.
* Implemented most of the mandatory hooks (vnode operations, lookup, read stat,
open/close/read dir). I was hoping to get directory listings with sshfs now,
but as I had to find out, it implements the deprecated getdir() while we
only support the new {open,read,release}dir() interface yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29619 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added "fuse_api.h" header wrapping the inclusion of <fuse.h>.
* Implemented the fuse_fs_*() functions.
* More work on the initialization procedure for the client file system. We do
now start a separate thread which calls the main() function. It won't return
from fuse_main_real() until unmounting the FS. We create a fuse_fs structure
and call the client FS initialization and cleanup hooks.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29613 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added FileSystem and Volume subclasses for the FUSE interface. ATM they are
mostly skeletons, doing a bit of initialization.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29604 a95241bf-73f2-0310-859d-f6bbb57e9c96

userlandfs: Fix 64 bit debug build.

UserlandFS: Make 64 bit clean and enable build for x86_64.

I did not bother to fix the BeOS kernel emulation, so this part is
still left out of the x86_64 build.

Fixed warning.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34145 a95241bf-73f2-0310-859d-f6bbb57e9c96

* For every request to userland we also send the team/thread/user/group ID of
the current thread, now. Implemented by introducing a new base class
KernelRequest which has respective attributes.
* Server: RequestThreadContext does now also save the request that is being
processed. Furthermore some space has been reserved for file system specific
data, which can be initialized by the new
FileSystem::InitRequestThreadContext().
* FUSE library: Implemented fuse_get_context() using the new
RequestThreadContext feature.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29872 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Initialize fuse_config before parsing the arguments.
* Implemented fuse_is_lib_option() more correctly.
* Actually use the value of the "use_ino" option.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29871 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed double-lock in RemoveDir() spotted by Stippi.
* Added node monitoring support. For the changes we make at least. Changes made
by other peer in network file systems are not recognized.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29749 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed WriteFSInfo(). It's used only for changing the volume name and we
can't implement that with the FUSE interface.
* We now mark nodes dirty after a write operation.
* Implemented Sync() by fsync()ing all dirty nodes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29746 a95241bf-73f2-0310-859d-f6bbb57e9c96

Make gcc 4 happy.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29742 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed incorrect loop check in _UnlockNodeChainInternal() nothing would ever
be unlocked.
* Fixed incorrect array indexing in _FindCommonAncestor().
* Fixed copy and paste bugs in _LockNodeChainsInternal().
* Added MultiNodeLocker class, a RAII frontend for _{Lock,Unlock}NodeChains().
* Implemented entry renaming and hard linking.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29741 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Refactored node locking methods. There's now a LockIterator class which helps
with locking.
* Implemented methods for locking two directories. It's a bit complex, since
we need to enforce a global locking order on the node tree to avoid
deadlocks. Untested yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29738 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed the asynchronous I/O methods. We won't implement them for the time
being.
* Introduced locking for FileCookie.
* Implemented SetFlags() and FSync().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29736 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented WriteStat() (backend for chown(), chmod(), utime(), truncate()).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29722 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed the fs_vnode_ops::create_dir() parameter for returning the ID of the
newly created dir. The VFS really doesn't need it and for some file systems
it might not be easy to get by. Several file systems (e.g. rootfs and fat)
were ignoring the parameter anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29719 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for symlink and directory creation, as well as entry deletion
(directories and other nodes).
* Removed methods we can't possibly implement, since the FUSE interface doesn't
provide them and we can't emulate them.
* A FUSEEntry does now also own a reference to its parent directory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29715 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added support for O_TRUNC, file creation, and writing to files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29689 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Preparations for write support: Added a locking to the existing hooks. We
need to make sure that the paths of nodes don't change while we're meddling
with them. We read-lock the directories up to the root directory for that
purpose.
* Added missing locking for directory and attribute directory cookies.
We have to do that, since concurrent readdir()s on the same dir handle are
possible and we write-access the cookie data in such a case.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29687 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented the attribute directory methods. Untested yet -- sshfs doesn't
support the respective xattr hooks.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29656 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented ReadSymlink() and Access().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29655 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Got rid of from_fuse_error(). The client FS hooks are supposed to return
negative error codes now (e.g. using the new error mapping mechanism). This
is necessary since the read() and write() hooks have to return a size or a
negative error code.
* Implemented Read(). We can now read sshfs files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29654 a95241bf-73f2-0310-859d-f6bbb57e9c96

A non-empty volume name looks much better in Tracker.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29635 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed the directory filler callbacks. It is possible that it is passed a NULL
struct stat (new callback) or a 0 type. So if we don't have a node type, we
need to stat the node.
* Added simple opening/closing of files (no reading/writing yet).

It's now possible to browse sshfs volumes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29634 a95241bf-73f2-0310-859d-f6bbb57e9c96

As per the documentation of the statfs() hook, some statvfs members are
ignored. So we must not use them.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29624 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for the zero offset method for the readdir() hook's filler
callback.
* Added support for the deprecated getdir() hook.
* Fixed various bugs.

Listing the root directory with sshfs does now work. For subdirectories
stat()ing the entries seems to fail, which might be due to the yet missing
open() support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29623 a95241bf-73f2-0310-859d-f6bbb57e9c96

* More work on the file system initialization. Mounting/unmounting works now
with sshfs.
* Added basic node and entry management, which we need, since the FUSE
interface works with paths only, while our VFS plays with node IDs and
node cookies.
* Implemented most of the mandatory hooks (vnode operations, lookup, read stat,
open/close/read dir). I was hoping to get directory listings with sshfs now,
but as I had to find out, it implements the deprecated getdir() while we
only support the new {open,read,release}dir() interface yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29619 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added "fuse_api.h" header wrapping the inclusion of <fuse.h>.
* Implemented the fuse_fs_*() functions.
* More work on the initialization procedure for the client file system. We do
now start a separate thread which calls the main() function. It won't return
from fuse_main_real() until unmounting the FS. We create a fuse_fs structure
and call the client FS initialization and cleanup hooks.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29613 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added FileSystem and Volume subclasses for the FUSE interface. ATM they are
mostly skeletons, doing a bit of initialization.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29604 a95241bf-73f2-0310-859d-f6bbb57e9c96