Implement more virtuals in Node and Directory

* Node: Add default implementations for UserID(), GroupID(),
OpenAttributeDirectory(), and OpenAttribute().
* Directory: Add default implementations for Mode() and FileSize().
* Remove the respective hook implementations in the PackageLink*
classes.

Add Node::Init() flags parameter

* Add Node::Init() flags:
- NODE_FLAG_KEEP_NAME: Take over ownership of the name.
- NODE_FLAG_CONST_NAME: Don't copy the name -- it's a constant that
lives at least as long as the object.
* Remove Init() implementations in derived classes that just call the
base class version.

Empty Node::VFS{Init(),Uninit}() implementations

Pull derived UnpackingDirectory out of Directory

Move all package specifics from now abstract Directory to new derived
class UnpackingDirectory and adjust the Volume implementation
accordingly. This concludes the Node/Directory refactoring. Neither
class is aware of packages anymore.

Remove package related dependencies from Node

* Move package related methods from Node to new interface UnpackingNode.
* LeafNode and Directory derive from UnpackingNode now.
* Adjust Volume implementation accordingly.

Attribute dir access kernel interface abstraction

* Introduce interface AttributeDirectoryCookie and currently only
implementation UnpackingAttributeDirectoryCookie. This is an interface
for reading/rewinding an attribute directory.
* Add abstract virtual Node::OpenAttributeDirectory() method that
returns an AttributeDirectoryCookie and implement it for derived
classes.
* In the kernel interface attribute directory hooks use
AttributeDirectoryCookie now.

Kernel interface abstraction for attribute access

* Introduce interface AttributeCookie and currently only implementation
UnpackingAttributeCookie. This is an interface for reading/stat()ing
an attribute.
* Add abstract virtual Node::OpenAttribute() method that returns an
AttributeCookie and implemented it for derived classes.
* In the kernel interface attribute hooks use AttributeCookie now. The
attribute directory hooks are unchanged.

Remove kernel_interface.cpp LeafNode dependency

Introduce abstract virtual Node::ReadSymlink() method that is now used
in packagefs_read_symlink() instead of casting to LeafNode.

* round up the value put into st_blocks
* inject modification time of package folder into root folder of
package-fs


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40230 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made PackageDomain BReferenceable.
* LeafNode/Directory: We make sure that the added PackageNode with the newest
modified time is always at the head of the list. This is the package node
whose stat, attribute data and, in case of non-directory nodes, also content
data will be returned. This results in a well-defined algorithm what happens
when multiple directories contain the same file -- the newest file wins.
* Resolved most TODOs regarding error handling when adding a package domain,
package, or package node.
* Volume::_AddPackageContentRootNode(): Fixed the back tracking loop. It would
just continue with siblings of the given root node, causing them to be added
more than once, leading to data structure corruption.
* We now listen to the packages directory. When packages are added or removed
their contents is automatically added/removed to the file system. We don't
listen to the package files themselves yet. I.e. modifying an "installed"
package in place respectively copying/downloading it there will probably not
work correctly.
Due to a limitation in the userlandfs the mechanism works correctly only when
using the kernel module. When running the userland version, one better leaves
the packages directory alone while packagefs is mounted.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34172 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added method PackageDataReader::ReadDataToOutput(), which writes the read
data to a DataOutput.
* Implemented packagefs' io() hook and changed the read() hook implementation
to use the file cache. It's now possible to mmap() files and thus execute
programs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34138 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Extract the attributes from the package files and attach them as
PackageNodeAttribute to the PackageNodes.
* Implemented the attribute FS interface hooks.
* Made Package and PackageNode BReferenceable.
* Fixed the reference management for Node.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34119 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Package: Added Open() (and matching Close()) method, which opens the package
file once, tracking an open count.
* Added VFSInit()/VFSUninit() methods to the Node and PackageNode class
hierarchies, called by the {get,put}_vnode() PackageFile implements them to
set up/tear down access to the file data. Also added a Read() reading the
data.
* Implemented the open(), free_cookie(), and read() FS hooks for real. Reading
files works now. Executing doesn't yet -- it requires working with
IORequests in a way not supported by the userlandfs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34102 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Filter out write permissions.
* We now report more correct stat data. The information are retrieved from the
Package* objects.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34098 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented intermediate base class PackageLeafNode for PackageFile and
PackageSymlink with a "fat" interface.
* Replaced File and Symlink by fat class LeafNode.
* Added Package* object management to Directory and LeafNode.
* Implemented packagefs_read_symlink(), so symlinks work now.
* Added some missing locking the kernel interface.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34096 a95241bf-73f2-0310-859d-f6bbb57e9c96

Work in progress:
* The FS parses package files from "/boot/common/packages" and builds an
node tree representation of the contained entries. Merging directories should
work. Lots of other stuff is missing yet, though.
* Implemented the hooks for directory entry lookup and iteration. So it's
possible to see the contents of the FS at least.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34088 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented the most basic functionality required to cleanly mount and unmount
(at least in userlandfs).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34069 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implement more virtuals in Node and Directory

* Node: Add default implementations for UserID(), GroupID(),
OpenAttributeDirectory(), and OpenAttribute().
* Directory: Add default implementations for Mode() and FileSize().
* Remove the respective hook implementations in the PackageLink*
classes.

Add Node::Init() flags parameter

* Add Node::Init() flags:
- NODE_FLAG_KEEP_NAME: Take over ownership of the name.
- NODE_FLAG_CONST_NAME: Don't copy the name -- it's a constant that
lives at least as long as the object.
* Remove Init() implementations in derived classes that just call the
base class version.

Empty Node::VFS{Init(),Uninit}() implementations

Pull derived UnpackingDirectory out of Directory

Move all package specifics from now abstract Directory to new derived
class UnpackingDirectory and adjust the Volume implementation
accordingly. This concludes the Node/Directory refactoring. Neither
class is aware of packages anymore.

Remove package related dependencies from Node

* Move package related methods from Node to new interface UnpackingNode.
* LeafNode and Directory derive from UnpackingNode now.
* Adjust Volume implementation accordingly.

Attribute dir access kernel interface abstraction

* Introduce interface AttributeDirectoryCookie and currently only
implementation UnpackingAttributeDirectoryCookie. This is an interface
for reading/rewinding an attribute directory.
* Add abstract virtual Node::OpenAttributeDirectory() method that
returns an AttributeDirectoryCookie and implement it for derived
classes.
* In the kernel interface attribute directory hooks use
AttributeDirectoryCookie now.

Kernel interface abstraction for attribute access

* Introduce interface AttributeCookie and currently only implementation
UnpackingAttributeCookie. This is an interface for reading/stat()ing
an attribute.
* Add abstract virtual Node::OpenAttribute() method that returns an
AttributeCookie and implemented it for derived classes.
* In the kernel interface attribute hooks use AttributeCookie now. The
attribute directory hooks are unchanged.

Remove kernel_interface.cpp LeafNode dependency

Introduce abstract virtual Node::ReadSymlink() method that is now used
in packagefs_read_symlink() instead of casting to LeafNode.

* round up the value put into st_blocks
* inject modification time of package folder into root folder of
package-fs


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40230 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made PackageDomain BReferenceable.
* LeafNode/Directory: We make sure that the added PackageNode with the newest
modified time is always at the head of the list. This is the package node
whose stat, attribute data and, in case of non-directory nodes, also content
data will be returned. This results in a well-defined algorithm what happens
when multiple directories contain the same file -- the newest file wins.
* Resolved most TODOs regarding error handling when adding a package domain,
package, or package node.
* Volume::_AddPackageContentRootNode(): Fixed the back tracking loop. It would
just continue with siblings of the given root node, causing them to be added
more than once, leading to data structure corruption.
* We now listen to the packages directory. When packages are added or removed
their contents is automatically added/removed to the file system. We don't
listen to the package files themselves yet. I.e. modifying an "installed"
package in place respectively copying/downloading it there will probably not
work correctly.
Due to a limitation in the userlandfs the mechanism works correctly only when
using the kernel module. When running the userland version, one better leaves
the packages directory alone while packagefs is mounted.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34172 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added method PackageDataReader::ReadDataToOutput(), which writes the read
data to a DataOutput.
* Implemented packagefs' io() hook and changed the read() hook implementation
to use the file cache. It's now possible to mmap() files and thus execute
programs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34138 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Extract the attributes from the package files and attach them as
PackageNodeAttribute to the PackageNodes.
* Implemented the attribute FS interface hooks.
* Made Package and PackageNode BReferenceable.
* Fixed the reference management for Node.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34119 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Package: Added Open() (and matching Close()) method, which opens the package
file once, tracking an open count.
* Added VFSInit()/VFSUninit() methods to the Node and PackageNode class
hierarchies, called by the {get,put}_vnode() PackageFile implements them to
set up/tear down access to the file data. Also added a Read() reading the
data.
* Implemented the open(), free_cookie(), and read() FS hooks for real. Reading
files works now. Executing doesn't yet -- it requires working with
IORequests in a way not supported by the userlandfs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34102 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Filter out write permissions.
* We now report more correct stat data. The information are retrieved from the
Package* objects.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34098 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented intermediate base class PackageLeafNode for PackageFile and
PackageSymlink with a "fat" interface.
* Replaced File and Symlink by fat class LeafNode.
* Added Package* object management to Directory and LeafNode.
* Implemented packagefs_read_symlink(), so symlinks work now.
* Added some missing locking the kernel interface.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34096 a95241bf-73f2-0310-859d-f6bbb57e9c96

Work in progress:
* The FS parses package files from "/boot/common/packages" and builds an
node tree representation of the contained entries. Merging directories should
work. Lots of other stuff is missing yet, though.
* Implemented the hooks for directory entry lookup and iteration. So it's
possible to see the contents of the FS at least.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34088 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented the most basic functionality required to cleanly mount and unmount
(at least in userlandfs).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34069 a95241bf-73f2-0310-859d-f6bbb57e9c96