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.

* checksumfs_write_stat(): Actually add the node to the transaction as the
comment claims. Spotted by Axel.
* Added preallocate() slot to gCheckSumFSVnodeOps.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39283 a95241bf-73f2-0310-859d-f6bbb57e9c96

* checksumfs_lookup(): The flags return parameter was never set, leading to
weird behavior when running in kernel.
* checksumfs_io(): Try to lock with timeout when the request is VIP. This
works around a potential quasi-deadlock: Most write support FS hooks
potentially allocate memory (e.g. in block_cache_get*()) while holding a
write lock to a node. When memory is low they have to wait for pages to
become available. The page writer might block on such node which in turn
would prevent modified pages from becoming eligible for recycling. Should
only in rare low memory cases have led to a problem.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37687 a95241bf-73f2-0310-859d-f6bbb57e9c96

checksumfs_io(): We are responsible for calling notify_io_request() when we
decide to fail for some reason.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37662 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Volume::Create{File,Directory,SymLink}():
- Simplified by using the new common _CreateNode(). Changed the constructors
slightly -- the block index is now set via a separate SetBlockIndex()
method.
- The block allocated for the node was not cleared. At least for directories
that is required, though.
* Added attribute support:
- Refactored/extended {open,create}_file() and DirCookie a bit, so they can
also be used for attributes/attribute directories.
- Implemented all relevant attribute FS hooks.
- Node::DeletingNode(): Changed interface (it creates the transaction(s) as
needed, now and doesn't return the error code anymore. The base class
implementation frees the attribute directory, the Directory implementation
also unlinks all entries and frees the entry tree.
* checksumfs_write_stat(): B_STAT_MODE was not handled.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37626 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added node monitoring support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37601 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented hooks write_fs_info(), sync(), set_flags(), fsync(), access().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37595 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented link() hook.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37582 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented rename() hook.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37579 a95241bf-73f2-0310-859d-f6bbb57e9c96

Prevent creation of entries in unlinked directories.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37563 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a File class for representing regular files. We use a simple block tree
for the data management. Reading/writing (using file cache and file map) is
implemented, but not exactly well tested yet.
* Renamed SymLink::{Read,Write}() to {Read,Write}SymLink().
* Implemented FS hooks write_stat(), create(), read(), write(), io().
* Added O_TRUNC support to open() hook.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37507 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added symlink support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37481 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added Transaction class which wraps a block cache transaction and performs
all other operations required to roll back a transaction. Transactions are
fully serialized -- due to limitations of our block cache and also to keep
things simple.
* Use a transaction for all write operations.
* Implemented the directory entry management code (a simple tree algorithm).
* Finished/implemented the FS hooks for directory entry lookup, directory
iteration, creation, and removal.
* Added non-persistent support for node access times.
* Set the user and group IDs on node creation.
* Added permission checks to several FS hooks.
* BlockAllocator::_Free(): The number of freed blocks was subtracted from
fFreeBlocks instead of added.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37478 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added the beginnings of node support.
* Added the bare minimum of file system hooks to mount the file system. Can't
do anything more than listing the (empty) root directory yet, though.
* Added Jamfile for building the file system for the userlandfs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37406 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved the checksum device driver to subdir "driver".
* Created a file system module and a disk system add-on. Currently only
initializing and identifying/scanning is supported.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37300 a95241bf-73f2-0310-859d-f6bbb57e9c96

* checksumfs_write_stat(): Actually add the node to the transaction as the
comment claims. Spotted by Axel.
* Added preallocate() slot to gCheckSumFSVnodeOps.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39283 a95241bf-73f2-0310-859d-f6bbb57e9c96

* checksumfs_lookup(): The flags return parameter was never set, leading to
weird behavior when running in kernel.
* checksumfs_io(): Try to lock with timeout when the request is VIP. This
works around a potential quasi-deadlock: Most write support FS hooks
potentially allocate memory (e.g. in block_cache_get*()) while holding a
write lock to a node. When memory is low they have to wait for pages to
become available. The page writer might block on such node which in turn
would prevent modified pages from becoming eligible for recycling. Should
only in rare low memory cases have led to a problem.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37687 a95241bf-73f2-0310-859d-f6bbb57e9c96

checksumfs_io(): We are responsible for calling notify_io_request() when we
decide to fail for some reason.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37662 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Volume::Create{File,Directory,SymLink}():
- Simplified by using the new common _CreateNode(). Changed the constructors
slightly -- the block index is now set via a separate SetBlockIndex()
method.
- The block allocated for the node was not cleared. At least for directories
that is required, though.
* Added attribute support:
- Refactored/extended {open,create}_file() and DirCookie a bit, so they can
also be used for attributes/attribute directories.
- Implemented all relevant attribute FS hooks.
- Node::DeletingNode(): Changed interface (it creates the transaction(s) as
needed, now and doesn't return the error code anymore. The base class
implementation frees the attribute directory, the Directory implementation
also unlinks all entries and frees the entry tree.
* checksumfs_write_stat(): B_STAT_MODE was not handled.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37626 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added node monitoring support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37601 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented hooks write_fs_info(), sync(), set_flags(), fsync(), access().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37595 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented link() hook.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37582 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented rename() hook.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37579 a95241bf-73f2-0310-859d-f6bbb57e9c96

Prevent creation of entries in unlinked directories.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37563 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a File class for representing regular files. We use a simple block tree
for the data management. Reading/writing (using file cache and file map) is
implemented, but not exactly well tested yet.
* Renamed SymLink::{Read,Write}() to {Read,Write}SymLink().
* Implemented FS hooks write_stat(), create(), read(), write(), io().
* Added O_TRUNC support to open() hook.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37507 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added symlink support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37481 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added Transaction class which wraps a block cache transaction and performs
all other operations required to roll back a transaction. Transactions are
fully serialized -- due to limitations of our block cache and also to keep
things simple.
* Use a transaction for all write operations.
* Implemented the directory entry management code (a simple tree algorithm).
* Finished/implemented the FS hooks for directory entry lookup, directory
iteration, creation, and removal.
* Added non-persistent support for node access times.
* Set the user and group IDs on node creation.
* Added permission checks to several FS hooks.
* BlockAllocator::_Free(): The number of freed blocks was subtracted from
fFreeBlocks instead of added.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37478 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added the beginnings of node support.
* Added the bare minimum of file system hooks to mount the file system. Can't
do anything more than listing the (empty) root directory yet, though.
* Added Jamfile for building the file system for the userlandfs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37406 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved the checksum device driver to subdir "driver".
* Created a file system module and a disk system add-on. Currently only
initializing and identifying/scanning is supported.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37300 a95241bf-73f2-0310-859d-f6bbb57e9c96