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ToDo:
- Find and fix bugs.
- W.r.t. s_maxbytes still need to be careful on reading/truncating as
there are dragons lurking in the details, e.g. read_inode() currently
does no checks for file size wrt s_maxbytes. So what happens when a
user open()s a file with i_size > s_maxbytes? Should read_inode()
truncate the visible i_size? Will the user just get -E2BIG (or
whatever) on open()? Or will (s)he be able to open() but lseek() and
read() will fail when s_maxbytes is reached? -> Investigate this.
- Implement/allow non-resident index bitmaps in dir.c::ntfs_readdir()
and then also consider initialized_size w.r.t. the bitmaps, etc.
- vcn_to_lcn() should somehow return the correct pointer within the
->run_list so we can get at the lcns for the following vcns, this is
strictly a speed optimization. Obviously need to keep the ->run_list
locked or RACE. load_attribute_list() already performs such an
optimization so use the same optimization where desired.
- Consider if ntfs_file_read_compressed_block() shouldn't be coping
with initialized_size < data_size. I don't think it can happen but
it requires more careful consideration.
- CLEANUP: At the moment we have two copies of almost identical
functions in aops.c, can merge them once fake inode address space
based attribute i/o is further developed.
- CLEANUP: Modularising code in aops.c a bit, e.g. a-la get_block(),
will be cleaner and make code reuse easier.
- Modify ntfs_read_locked_inode() to return an error code and update
callers, i.e. ntfs_iget(), to pass that error code up instead of just
using -EIO.
- Enable NFS exporting of NTFS.
- Use fake inodes for address space i/o.
2.0.13 - Use iget5_locked() in preparation for fake inodes and small cleanups.
- Remove nr_mft_bits and the now superfluous union with nr_mft_records
from ntfs_volume structure.
- Remove nr_lcn_bits and the now superfluous union with nr_clusters
from ntfs_volume structure.
- Use iget5_locked() and friends instead of conventional iget(). Wrap
the call in fs/ntfs/inode.c::ntfs_iget() and update callers of iget()
to use ntfs_iget(). Leave only one iget() call at mount time so we
don't need an ntfs_iget_mount().
- Change fs/ntfs/inode.c::ntfs_new_extent_inode() to take mft_no as an
additional argument.
2.0.12 - Initial cleanup of address space operations following 2.0.11 changes.
- Merge fs/ntfs/aops.c::end_buffer_read_mst_async() and
fs/ntfs/aops.c::end_buffer_read_file_async() into one function
fs/ntfs/aops.c::end_buffer_read_attr_async() using NInoMstProtected()
to determine whether to apply mst fixups or not.
- Above change allows merging fs/ntfs/aops.c::ntfs_file_read_block()
and fs/ntfs/aops.c::ntfs_mst_readpage() into one function
fs/ntfs/aops.c::ntfs_attr_read_block(). Also, create a tiny wrapper
fs/ntfs/aops.c::ntfs_mst_readpage() to transform the parameters from
the VFS readpage function prototype to the ntfs_attr_read_block()
function prototype.
2.0.11 - Initial preparations for fake inode based attribute i/o.
- Move definition of ntfs_inode_state_bits to fs/ntfs/inode.h and
do some macro magic (adapted from include/linux/buffer_head.h) to
expand all the helper functions NInoFoo(), NInoSetFoo(), and
NInoClearFoo().
- Add new flag to ntfs_inode_state_bits: NI_Sparse.
- Add new fields to ntfs_inode structure to allow use of fake inodes
for attribute i/o: type, name, name_len. Also add new state bits:
NI_Attr, which, if set, indicates the inode is a fake inode, and
NI_MstProtected, which, if set, indicates the attribute uses multi
sector transfer protection, i.e. fixups need to be applied after
reads and before/after writes.
- Rename fs/ntfs/inode.c::ntfs_{new,clear,destroy}_inode() to
ntfs_{new,clear,destroy}_extent_inode() and update callers.
- Use ntfs_clear_extent_inode() in fs/ntfs/inode.c::__ntfs_clear_inode()
instead of ntfs_destroy_extent_inode().
- Cleanup memory deallocations in {__,}ntfs_clear_{,big_}inode().
- Make all operations on ntfs inode state bits use the NIno* functions.
- Set up the new ntfs inode fields and state bits in
fs/ntfs/inode.c::ntfs_read_inode() and add appropriate cleanup of
allocated memory to __ntfs_clear_inode().
- Cleanup ntfs_inode structure a bit for better ordering of elements
w.r.t. their size to allow better packing of the structure in memory.
2.0.10 - There can only be 2^32 - 1 inodes on an NTFS volume.
- Add check at mount time to verify that the number of inodes on the
volume does not exceed 2^32 - 1, which is the maximum allowed for
NTFS according to Microsoft.
- Change mft_no member of ntfs_inode structure to be unsigned long.
Update all users. This makes ntfs_inode->mft_no just a copy of struct
inode->i_ino. But we can't just always use struct inode->i_ino and
remove mft_no because extent inodes do not have an attached struct
inode.
2.0.9 - Decompression engine now uses a single buffer and other cleanups.
- Change decompression engine to use a single buffer protected by a
spin lock instead of per-CPU buffers. (Rusty Russell)
- Do not update cb_pos when handling a partial final page during
decompression of a sparse compression block, as the value is later
reset without being read/used. (Rusty Russell)
- Switch to using the new KM_BIO_SRC_IRQ for atomic kmap()s. (Andrew
Morton)
- Change buffer size in ntfs_readdir()/ntfs_filldir() to use
NLS_MAX_CHARSET_SIZE which makes the buffers almost 1kiB each but
it also makes everything safer so it is a good thing.
- Miscellaneous minor cleanups to comments.
2.0.8 - Major updates for handling of case sensitivity and dcache aliasing.
Big thanks go to Al Viro and other inhabitants of #kernel for investing
their time to discuss the case sensitivity and dcache aliasing issues.
- Remove unused source file fs/ntfs/attraops.c.
- Remove show_inodes mount option(s), thus dropping support for
displaying of short file names.
- Remove deprecated mount option posix.
- Restore show_sys_files mount option.
- Add new mount option case_sensitive, to determine if the driver
treats file names as case sensitive or not. If case sensitive, create
file names in the POSIX namespace. Otherwise create file names in the
LONG/WIN32 namespace. Note, files remain accessible via their short
file name, if it exists.
- Remove really dumb logic bug in boot sector recovery code.
- Fix dcache aliasing issues wrt short/long file names via changes
to fs/ntfs/dir.c::ntfs_lookup_inode_by_name() and
fs/ntfs/namei.c::ntfs_lookup():
- Add additional argument to ntfs_lookup_inode_by_name() in which we
return information about the matching file name if the case is not
matching or the match is a short file name. See comments above the
function definition for details.
- Change ntfs_lookup() to only create dcache entries for the correctly
cased file name and only for the WIN32 namespace counterpart of DOS
namespace file names. This ensures we have only one dentry per
directory and also removes all dcache aliasing issues between short
and long file names once we add write support. See comments above
function for details.
- Fix potential 1 byte overflow in fs/ntfs/unistr.c::ntfs_ucstonls().
2.0.7 - Minor cleanups and updates for changes in core kernel code.
- Remove much of the NULL struct element initializers.
- Various updates to make compatible with recent kernels.
- Remove defines of MAX_BUF_PER_PAGE and include linux/buffer_head.h
in fs/ntfs/ntfs.h instead.
- Remove no longer needed KERNEL_VERSION checks. We are now in the
kernel proper so they are no longer needed.
2.0.6 - Major bugfix to make compatible with other kernel changes.
- Initialize the mftbmp address space properly now that there are more
fields in the struct address_space. This was leading to hangs and
oopses on umount since 2.5.12 because of changes to other parts of
the kernel. We probably want a kernel generic init_address_space()
function...
- Drop BKL from ntfs_readdir() after consultation with Al Viro. The
only caller of ->readdir() is vfs_readdir() which holds i_sem during
the call, and i_sem is sufficient protection against changes in the
directory inode (including ->i_size).
- Use generic_file_llseek() for directories (as opposed to
default_llseek()) as this downs i_sem instead of the BKL which is
what we now need for exclusion against ->f_pos changes considering we
no longer take the BKL in ntfs_readdir().
2.0.5 - Major bugfix. Buffer overflow in extent inode handling.
- No need to set old blocksize in super.c::ntfs_fill_super() as the
VFS does so via invocation of deactivate_super() calling
fs->fill_super() calling block_kill_super() which does it.
- BKL moved from VFS into dir.c::ntfs_readdir(). (Linus Torvalds)
-> Do we really need it? I don't think so as we have exclusion on
the directory ntfs_inode rw_semaphore mrec_lock. We mmight have to
move the ->f_pos accesses under the mrec_lock though. Check this...
- Fix really, really, really stupid buffer overflow in extent inode
handling in mft.c::map_extent_mft_record().
2.0.4 - Cleanups and updates for kernel 2.5.11.
- Add documentation on how to use the MD driver to be able to use NTFS
stripe and volume sets in Linux and generally cleanup documentation
a bit.
Remove all uses of kdev_t in favour of struct block_device *:
- Change compress.c::ntfs_file_read_compressed_block() to use
sb_getblk() instead of getblk().
- Change super.c::ntfs_fill_super() to use bdev_hardsect_size() instead
of get_hardsect_size().
- No need to get old blocksize in super.c::ntfs_fill_super() as
fs/super.c::get_sb_bdev() already does this.
- Set bh->b_bdev instead of bh->b_dev throughout aops.c.
2.0.3 - Small bug fixes, cleanups, and performance improvements.
- Remove some dead code from mft.c.
- Optimize readpage and read_block functions throughout aops.c so that
only initialized blocks are read. Non-initialized ones have their
buffer head mapped, zeroed, and set up to date, without scheduling
any i/o. Thanks to Al Viro for advice on how to avoid the device i/o.
Thanks go to Andrew Morton for spotting the below:
- Fix buglet in allocate_compression_buffers() error code path.
- Call flush_dcache_page() after modifying page cache page contents in
ntfs_file_readpage().
- Check for existence of page buffers throughout aops.c before calling
create_empty_buffers(). This happens when an I/O error occurs and the
read is retried. (It also happens once writing is implemented so that
needed doing anyway but I had left it for later...)
- Don't BUG_ON() uptodate and/or mapped buffers throughout aops.c in
readpage and read_block functions. Reasoning same as above (i.e. I/O
error retries and future write code paths.)
2.0.2 - Minor updates and cleanups.
- Cleanup: rename mst.c::__post_read_mst_fixup to post_write_mst_fixup
and cleanup the code a bit, removing the unused size parameter.
- Change default fmask to 0177 and update documentation.
- Change attrib.c::get_attr_search_ctx() to return the search context
directly instead of taking the address of a pointer. A return value
of NULL means the allocation failed. Updated all callers
appropriately.
- Update to 2.5.9 kernel (preserving backwards compatibility) by
replacing all occurences of page->buffers with page_buffers(page).
- Fix minor bugs in run list merging, also minor cleanup.
- Updates to bootsector layout and mft mirror contents descriptions.
- Small bug fix in error detection in unistr.c and some cleanups.
- Grow name buffer allocations in unistr.c in aligned mutlipled of 64
bytes.
2.0.1 - Minor updates.
- Make default umask correspond to documentation.
- Improve documentation.
- Set default mode to include execute bit. The {u,f,d}mask can be used
to take it away if desired. This allows binaries to be executed from
a mounted ntfs partition.
2.0.0 - New version number. Remove TNG from the name. Now in the kernel.
- Add kill_super, just keeping up with the vfs changes in the kernel.
- Repeat some changes from tng-0.0.8 that somehow got lost on the way
from the CVS import into BitKeeper.
- Begin to implement proper handling of allocated_size vs
initialized_size vs data_size (i.e. i_size). Done are
mft.c::ntfs_mft_readpage(), aops.c::end_buffer_read_index_async(),
and attrib.c::load_attribute_list().
- Lock the run list in attrib.c::load_attribute_list() while using it.
- Fix memory leak in ntfs_file_read_compressed_block() and generally
clean up compress.c a little, removing some uncommented/unused debug
code.
- Tidy up dir.c a little bit.
- Don't bother getting the run list in inode.c::ntfs_read_inode().
- Merge mft.c::ntfs_mft_readpage() and aops.c::ntfs_index_readpage()
creating aops.c::ntfs_mst_readpage(), improving the handling of
holes and overflow in the process and implementing the correct
equivalent of ntfs_file_get_block() in ntfs_mst_readpage() itself.
I am aiming for correctness at the moment. Modularisation can come
later.
- Rename aops.c::end_buffer_read_index_async() to
end_buffer_read_mst_async() and optimize the overflow checking and
handling.
- Use the host of the mftbmp address space mapping to hold the ntfs
volume. This is needed so the async i/o completion handler can
retrieve a pointer to the volume. Hopefully this will not cause
problems elsewhere in the kernel... Otherwise will need to use a
fake inode.
- Complete implementation of proper handling of allocated_size vs
initialized_size vs data_size (i.e. i_size) in whole driver.
Basically aops.c is now completely rewritten.
- Change NTFS driver name to just NTFS and set version number to 2.0.0
to make a clear distinction from the old driver which is still on
version 1.1.22.
tng-0.0.8 - 08/03/2002 - Now using BitKeeper, http://linux-ntfs.bkbits.net/
- Replace bdevname(sb->s_dev) with sb->s_id.
- Remove now superfluous new-line characters in all callers of
ntfs_debug().
- Apply kludge in ntfs_read_inode(), setting i_nlink to 1 for
directories. Without this the "find" utility gets very upset which is
fair enough as Linux/Unix do not support directory hard links.
- Further run list merging work. (Richard Russon)
- Backwards compatibility for gcc-2.95. (Richard Russon)
- Update to kernel 2.5.5-pre1 and rediff the now tiny patch.
- Convert to new file system declaration using ->ntfs_get_sb() and
replacing ntfs_read_super() with ntfs_fill_super().
- Set s_maxbytes to MAX_LFS_FILESIZE to avoid page cache page index
overflow on 32-bit architectures.
- Cleanup upcase loading code to use ntfs_(un)map_page().
- Disable/reenable preemtion in critical sections of compession engine.
- Replace device size determination in ntfs_fill_super() with
sb->s_bdev->bd_inode->i_size (in bytes) and remove now superfluous
function super.c::get_nr_blocks().
- Implement a mount time option (show_inodes) allowing choice of which
types of inode names readdir() returns and modify ntfs_filldir()
accordingly. There are several parameters to show_inodes:
system: system files
win32: long file names (including POSIX file names) [DEFAULT]
long: same as win32
dos: short file names only (excluding POSIX file names)
short: same as dos
posix: same as both win32 and dos
all: all file names
Note that the options are additive, i.e. specifying:
-o show_inodes=system,show_inodes=win32,show_inodes=dos
is the same as specifying:
-o show_inodes=all
Note that the "posix" and "all" options will show all directory
names, BUT the link count on each directory inode entry is set to 1,
due to Linux not supporting directory hard links. This may well
confuse some userspace applications, since the directory names will
have the same inode numbers. Thus it is NOT advisable to use the
"posix" or "all" options. We provide them only for completeness sake.
- Add copies of allocated_size, initialized_size, and compressed_size to
the ntfs inode structure and set them up in
inode.c::ntfs_read_inode(). These reflect the unnamed data attribute
for files and the index allocation attribute for directories.
- Add copies of allocated_size and initialized_size to ntfs inode for
$BITMAP attribute of large directories and set them up in
inode.c::ntfs_read_inode().
- Add copies of allocated_size and initialized_size to ntfs volume for
$BITMAP attribute of $MFT and set them up in
super.c::load_system_files().
- Parse deprecated ntfs driver options (iocharset, show_sys_files,
posix, and utf8) and tell user what the new options to use are. Note
we still do support them but they will be removed with kernel 2.7.x.
- Change all occurences of integer long long printf formatting to hex
as printk() will not support long long integer format if/when the
div64 patch goes into the kernel.
- Make slab caches have stable names and change the names to what they
were intended to be. These changes are required/made possible by the
new slab cache name handling which removes the length limitation by
requiring the caller of kmem_cache_create() to supply a stable name
which is then referenced but not copied.
- Rename run_list structure to run_list_element and create a new
run_list structure containing a pointer to a run_list_element
structure and a read/write semaphore. Adapt all users of run lists
to new scheme and take and release the lock as needed. This fixes a
nasty race as the run_list changes even when inodes are locked for
reading and even when the inode isn't locked at all, so we really
needed the serialization. We use a semaphore rather than a spinlock
as memory allocations can sleep and doing everything GFP_ATOMIC
would be silly.
- Cleanup read_inode() removing all code checking for lowest_vcn != 0.
This can never happen due to the nature of lookup_attr() and how we
support attribute lists. If it did happen it would imply the inode
being corrupt.
- Check for lowest_vcn != 0 in ntfs_read_inode() and mark the inode as
bad if found.
- Update to 2.5.6-pre2 changes in struct address_space.
- Use parent_ino() when accessing d_parent inode number in dir.c.
- Import Sourceforge CVS repository into BitKeeper repository:
http://linux-ntfs.bkbits.net/ntfs-tng-2.5
- Update fs/Makefile, fs/Config.help, fs/Config.in, and
Documentation/filesystems/ntfs.txt for NTFS TNG.
- Create kernel configuration option controlling whether debugging
is enabled or not.
- Add the required export of end_buffer_io_sync() from the patches
directory to the kernel code.
- Update inode.c::ntfs_show_options() with show_inodes mount option.
- Update errors mount option.
tng-0.0.7 - 13/02/2002 - The driver is now feature complete for read-only!
- Cleanup mft.c and it's debug/error output in particular. Fix a minor
bug in mapping of extent inodes. Update all the comments to fit all
the recent code changes.
- Modify vcn_to_lcn() to cope with entirely unmapped run lists.
- Cleanups in compress.c, mostly comments and folding help.
- Implement attrib.c::map_run_list() as a generic helper.
- Make compress.c::ntfs_file_read_compressed_block() use map_run_list()
thus making code shorter and enabling attribute list support.
- Cleanup incorrect use of [su]64 with %L printf format specifier in
all source files. Type casts to [unsigned] long long added to correct
the mismatches (important for architectures which have long long not
being 64 bits).
- Merge async io completion handlers for directory indexes and $MFT
data into one by setting the index_block_size{_bits} of the ntfs
inode for $MFT to the mft_record_size{_bits} of the ntfs_volume.
- Cleanup aops.c, update comments.
- Make ntfs_file_get_block() use map_run_list() so all files now
support attribute lists.
- Make ntfs_dir_readpage() almost verbatim copy of
block_read_full_page() by using ntfs_file_get_block() with only real
difference being the use of our own async io completion handler
rather than the default one, thus reducing the amount of code and
automatically enabling attribute list support for directory indices.
- Fix bug in load_attribute_list() - forgot to call brelse in error
code path.
- Change parameters to find_attr() and lookup_attr(). We no longer
pass in the upcase table and its length. These can be gotten from
ctx->ntfs_ino->vol->upcase{_len}. Update all callers.
- Cleanups in attrib.c.
- Implement merging of run lists, attrib.c::merge_run_lists() and its
helpers. (Richard Russon)
- Attribute lists part 2, attribute extents and multi part run lists:
enable proper support for LCN_RL_NOT_MAPPED and automatic mapping of
further run list parts via attrib.c::map_run_list().
- Tiny endianness bug fix in decompress_mapping_pairs().
tng-0.0.6 - Encrypted directories, bug fixes, cleanups, debugging enhancements.
- Enable encrypted directories. (Their index root is marked encrypted
to indicate that new files in that directory should be created
encrypted.)
- Fix bug in NInoBmpNonResident() macro. (Cut and paste error.)
- Enable $Extend system directory. Most (if not all) extended system
files do not have unnamed data attributes so ntfs_read_inode() had to
special case them but that is ok, as the special casing recovery
happens inside an error code path so there is zero slow down in the
normal fast path. The special casing is done by introducing a new
function inode.c::ntfs_is_extended_system_file() which checks if any
of the hard links in the inode point to $Extend as being their parent
directory and if they do we assume this is an extended system file.
- Create a sysctl/proc interface to allow {dis,en}abling of debug output
when compiled with -DDEBUG. Default is debug messages to be disabled.
To enable them, one writes a non-zero value to /proc/sys/fs/ntfs-debug
(if /proc is enabled) or uses sysctl(2) to effect the same (if sysctl
interface is enabled). Inspired by old ntfs driver.
- Add debug_msgs insmod/kernel boot parameter to set whether debug
messages are {dis,en}abled. This is useful to enable debug messages
during ntfs initialization and is the only way to activate debugging
when the sysctl interface is not enabled.
- Cleanup debug output in various places.
- Remove all dollar signs ($) from the source (except comments) to
enable compilation on architectures whose gcc compiler does not
support dollar signs in the names of variables/constants. Attribute
types now start with AT_ instead of $ and $I30 is now just I30.
- Cleanup ntfs_lookup() and add consistency check of sequence numbers.
- Load complete run list for $MFT/$BITMAP during mount and cleanup
access functions. This means we now cope with $MFT/$BITMAP being
spread accross several mft records.
- Disable modification of mft_zone_multiplier on remount. We can always
reenable this later on if we really want to, but we will need to make
sure we readjust the mft_zone size / layout accordingly.
tng-0.0.5 - Modernize for 2.5.x and further in line-ing with Al Viro's comments.
- Use sb_set_blocksize() instead of set_blocksize() and verify the
return value.
- Use sb_bread() instead of bread() throughout.
- Add index_vcn_size{_bits} to ntfs_inode structure to store the size
of a directory index block vcn. Apply resulting simplifications in
dir.c everywhere.
- Fix a small bug somewhere (but forgot what it was).
- Change ntfs_{debug,error,warning} to enable gcc to do type checking
on the printf-format parameter list and fix bugs reported by gcc
as a result. (Richard Russon)
- Move inode allocation strategy to Al's new stuff but maintain the
divorce of ntfs_inode from struct inode. To achieve this we have two
separate slab caches, one for big ntfs inodes containing a struct
inode and pure ntfs inodes and at the same time fix some faulty
error code paths in ntfs_read_inode().
- Show mount options in proc (inode.c::ntfs_show_options()).
tng-0.0.4 - Big changes, getting in line with Al Viro's comments.
- Modified (un)map_mft_record functions to be common for read and write
case. To specify which is which, added extra parameter at front of
parameter list. Pass either READ or WRITE to this, each has the
obvious meaning.
- General cleanups to allow for easier folding in vi.
- attrib.c::decompress_mapping_pairs() now accepts the old run list
argument, and invokes attrib.c::merge_run_lists() to merge the old
and the new run lists.
- Removed attrib.c::find_first_attr().
- Implemented loading of attribute list and complete run list for $MFT.
This means we now cope with $MFT being spread across several mft
records.
- Adapt to 2.5.2-pre9 and the changed create_empty_buffers() syntax.
- Adapt major/minor/kdev_t/[bk]devname stuff to new 2.5.x kernels.
- Make ntfs_volume be allocated via kmalloc() instead of using a slab
cache. There are too little ntfs_volume structures at any one time
to justify a private slab cache.
- Fix bogus kmap() use in async io completion. Now use kmap_atomic().
Use KM_BIO_IRQ on advice from IRC/kernel...
- Use ntfs_map_page() in map_mft_record() and create ->readpage method
for reading $MFT (ntfs_mft_readpage). In the process create dedicated
address space operations (ntfs_mft_aops) for $MFT inode mapping. Also
removed the now superfluous exports from the kernel core patch.
- Fix a bug where kfree() was used insted of ntfs_free().
- Change map_mft_record() to take ntfs_inode as argument instead of
vfs inode. Dito for unmap_mft_record(). Adapt all callers.
- Add pointer to ntfs_volume to ntfs_inode.
- Add mft record number and sequence number to ntfs_inode. Stop using
i_ino and i_generation for in-driver purposes.
- Implement attrib.c::merge_run_lists(). (Richard Russon)
- Remove use of proper inodes by extent inodes. Move i_ino and
i_generation to ntfs_inode to do this. Apply simplifications that
result and remove iget_no_wait(), etc.
- Pass ntfs_inode everywhere in the driver (used to be struct inode).
- Add reference counting in ntfs_inode for the ntfs inode itself and
for the mapped mft record.
- Extend mft record mapping so we can (un)map extent mft records (new
functions (un)map_extent_mft_record), and so mappings are reference
counted and don't have to happen twice if already mapped - just ref
count increases.
- Add -o iocharset as alias to -o nls for backwards compatibility.
- The latest core patch is now tiny. In fact just a single additional
export is necessary over the base kernel.
tng-0.0.3 - Cleanups, enhancements, bug fixes.
- Work on attrib.c::decompress_mapping_pairs() to detect base extents
and setup the run list appropriately using knowledge provided by the
sizes in the base attribute record.
- Balance the get_/put_attr_search_ctx() calls so we don't leak memory
any more.
- Introduce ntfs_malloc_nofs() and ntfs_free() to allocate/free a single
page or use vmalloc depending on the amount of memory requested.
- Cleanup error output. The __FUNCTION__ "(): " is now added
automatically. Introduced a new header file debug.h to support this
and also moved ntfs_debug() function into it.
- Make reading of compressed files more intelligent and especially get
rid of the vmalloc_nofs() from readpage(). This now uses per CPU
buffers (allocated at first mount with cluster size <= 4kiB and
deallocated on last umount with cluster size <= 4kiB), and
asynchronous io for the compressed data using a list of buffer heads.
Er, we use synchronous io as async io only works on whole pages
covered by buffers and not on individual buffer heads...
- Bug fix for reading compressed files with sparse compression blocks.
tng-0.0.2 - Now handles larger/fragmented/compressed volumes/files/dirs.
- Fixed handling of directories when cluster size exceeds index block
size.
- Hide DOS only name space directory entries from readdir() but allow
them in lookup(). This should fix the problem that Linux doesn't
support directory hard links, while still allowing access to entries
via their short file name. This also has the benefit of mimicking
what Windows users are used to, so it is the ideal solution.
- Implemented sync_page everywhere so no more hangs in D state when
waiting for a page.
- Stop using bforget() in favour of brelse().
- Stop locking buffers unnecessarily.
- Implemented compressed files (inode->mapping contains uncompressed
data, raw compressed data is currently bread() into a vmalloc()ed
memory buffer).
- Enable compressed directories. (Their index root is marked compressed
to indicate that new files in that directory should be created
compressed.)
- Use vsnprintf rather than vsprintf in the ntfs_error and ntfs_warning
functions. (Thanks to Will Dyson for pointing this out.)
- Moved the ntfs_inode and ntfs_volume (the former ntfs_inode_info and
ntfs_sb_info) out of the common inode and super_block structures and
started using the generic_ip and generic_sbp pointers instead. This
makes ntfs entirely private with respect to the kernel tree.
- Detect compiler version and abort with error message if gcc less than
2.96 is used.
- Fix bug in name comparison function in unistr.c.
- Implement attribute lists part 1, the infrastructure: search contexts
and operations, find_external_attr(), lookup_attr()) and make the
code use the infrastructure.
- Fix stupid buffer overflow bug that became apparent on larger run
list containing attributes.
- Fix bugs in readdir() that became apparent on larger directories.
The driver is now really useful and survives the test
find . -type f -exec md5sum "{}" \;
without any error messages on a over 1GiB sized partition with >16k
files on it, including compressed files and directories and many files
and directories with attribute lists.
tng-0.0.1 - The first useful version.
- Added ntfs_lookup().
- Added default upcase generation and handling.
- Added compile options to be shown on module init.
- Many bug fixes that were "hidden" before.
- Update to latest kernel.
- Added ntfs_readdir().
- Added file operations for mmap(), read(), open() and llseek(). We just
use the generic ones. The whole point of going through implementing
readpage() methods and where possible get_block() call backs is that
this allows us to make use of the generic high level methods provided
by the kernel.
The driver is now actually useful! Yey. (-: It undoubtedly has got bugs
though and it doesn't implement accesssing compressed files yet. Also,
accessing files with attribute list attributes is not implemented yet
either. But for small or simple file systems it should work and allow
you to list directories, use stat on directory entries and the file
system, open, read, mmap and llseek around in files. A big mile stone
has been reached!
tng-0.0.0 - Initial version tag.
Initial driver implementation. The driver can mount and umount simple
NTFS file systems (i.e. ones without attribute lists in the system
files). If the mount fails there might be problems in the error handling
code paths, so be warned. Otherwise it seems to be loading the system
files nicely and the mft record read mapping/unmapping seems to be
working nicely, too. Proof of inode metadata in the page cache and non-
resident file unnamed stream data in the page cache concepts is thus
complete.