- In between ntfs_prepare/commit_write, need exclusion between
simultaneous file extensions. This is given to us by holding i_sem
on the inode. The only places in the kernel when a file is resized
- are prepare/commit write and truncate for both of which i_sem is
- held. Just have to be careful in readpage/writepage and all other
- helpers not running under i_sem that we play nice...
- Also need to be careful with initialized_size extention in
- ntfs_prepare_write. Basically, just be _very_ careful in this code...
- UPDATE: The only things that need to be checked are read/writepage
- which do not hold i_sem. Note writepage cannot change i_size but it
- needs to cope with a concurrent i_size change, just like readpage.
- Also both need to cope with concurrent changes to the other sizes,
- i.e. initialized/allocated/compressed size, as well.
+ are prepare/commit write and ntfs_truncate() for both of which i_sem
+ is held. Just have to be careful in read-/writepage and other helpers
+ not running under i_sem that we play nice... Also need to be careful
+ with initialized_size extention in ntfs_prepare_write and writepage.
+ UPDATE: The only things that need to be checked are
+ prepare/commit_write as well as the compressed write and the other
+ attribute resize/write cases like index attributes, etc. For now
+ none of these are implemented so are safe.
- Implement mft.c::sync_mft_mirror_umount(). We currently will just
leave the volume dirty on umount if the final iput(vol->mft_ino)
causes a write of any mirrored mft records due to the mft mirror
- Enable the code for setting the NT4 compatibility flag when we start
making NTFS 1.2 specific modifications.
-2.1.24-WIP
+2.1.25-WIP
+
+ - Change ntfs_map_runlist_nolock(), ntfs_attr_find_vcn_nolock() and
+ {__,}ntfs_cluster_free() to also take an optional attribute search
+ context as argument. This allows calling these functions with the
+ mft record mapped. Update all callers.
+ - Fix potential deadlock in ntfs_mft_data_extend_allocation_nolock()
+ error handling by passing in the active search context when calling
+ ntfs_cluster_free().
+ - Change ntfs_cluster_alloc() to take an extra boolean parameter
+ specifying whether the cluster are being allocated to extend an
+ attribute or to fill a hole.
+ - Change ntfs_attr_make_non_resident() to call ntfs_cluster_alloc()
+ with @is_extension set to TRUE and remove the runlist terminator
+ fixup code as this is now done by ntfs_cluster_alloc().
+ - Change ntfs_attr_make_non_resident to take the attribute value size
+ as an extra parameter. This is needed since we need to know the size
+ before we can map the mft record and our callers always know it. The
+ reason we cannot simply read the size from the vfs inode i_size is
+ that this is not necessarily uptodate. This happens when
+ ntfs_attr_make_non_resident() is called in the ->truncate call path.
+ - Fix ntfs_attr_make_non_resident() to update the vfs inode i_blocks
+ which is zero for a resident attribute but should no longer be zero
+ once the attribute is non-resident as it then has real clusters
+ allocated.
+ - Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
+ extend the allocation of an attributes. Optionally, the data size,
+ but not the initialized size can be extended, too.
+ - Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports
+ uncompressed and unencrypted files.
+ - Enable ATTR_SIZE attribute changes in ntfs_setattr(). This completes
+ the initial implementation of file truncation. Now both open(2)ing
+ a file with the O_TRUNC flag and the {,f}truncate(2) system calls
+ will resize a file appropriately. The limitations are that only
+ uncompressed and unencrypted files are supported. Also, there is
+ only very limited support for highly fragmented files (the ones whose
+ $DATA attribute is split into multiple attribute extents).
+
+2.1.24 - Lots of bug fixes and support more clean journal states.
- Support journals ($LogFile) which have been modified by chkdsk. This
means users can boot into Windows after we marked the volume dirty.
The Windows boot will run chkdsk and then reboot. The user can then
immediately boot into Linux rather than having to do a full Windows
boot first before rebooting into Linux and we will recognize such a
- journal and empty it as it is clean by definition.
+ journal and empty it as it is clean by definition. Note, this only
+ works if chkdsk left the journal in an obviously clean state.
- Support journals ($LogFile) with only one restart page as well as
journals with two different restart pages. We sanity check both and
either use the only sane one or the more recent one of the two in the
case that both are valid.
- - Modify fs/ntfs/malloc.h::ntfs_malloc_nofs() to do the kmalloc() based
- allocations with __GFP_HIGHMEM, analogous to how the vmalloc() based
- allocations are done.
- Add fs/ntfs/malloc.h::ntfs_malloc_nofs_nofail() which is analogous to
ntfs_malloc_nofs() but it performs allocations with __GFP_NOFAIL and
hence cannot fail.
- Add BUG() checks to ntfs_attr_make_non_resident() and ntfs_attr_set()
to ensure that these functions are never called for compressed or
encrypted attributes.
+ - Fix cluster (de)allocators to work when the runlist is NULL and more
+ importantly to take a locked runlist rather than them locking it
+ which leads to lock reversal.
+ - Truncate {a,c,m}time to the ntfs supported time granularity when
+ updating the times in the inode in ntfs_setattr().
+ - Fixup handling of sparse, compressed, and encrypted attributes in
+ fs/ntfs/inode.c::ntfs_read_locked_{,attr_,index_}inode(),
+ fs/ntfs/aops.c::ntfs_{read,write}page().
+ - Make ntfs_write_block() not instantiate sparse blocks if they contain
+ only zeroes.
+ - Optimize fs/ntfs/aops.c::ntfs_write_block() by extending the page
+ lock protection over the buffer submission for i/o which allows the
+ removal of the get_bh()/put_bh() pairs for each buffer.
+ - Fix fs/ntfs/aops.c::ntfs_{read,write}_block() to handle the case
+ where a concurrent truncate has truncated the runlist under our feet.
+ - Fix page_has_buffers()/page_buffers() handling in fs/ntfs/aops.c.
+ - In fs/ntfs/aops.c::ntfs_end_buffer_async_read(), use a bit spin lock
+ in the first buffer head instead of a driver global spin lock to
+ improve scalability.
+ - Minor fix to error handling and error message display in
+ fs/ntfs/aops.c::ntfs_prepare_nonresident_write().
+ - Change the mount options {u,f,d}mask to always parse the number as
+ an octal number to conform to how chmod(1) works, too. Thanks to
+ Giuseppe Bilotta and Horst von Brand for pointing out the errors of
+ my ways.
+ - Fix various bugs in the runlist merging code. (Based on libntfs
+ changes by Richard Russon.)
+ - Fix sparse warnings that have crept in over time.
+ - Change ntfs_cluster_free() to require a write locked runlist on entry
+ since we otherwise get into a lock reversal deadlock if a read locked
+ runlist is passed in. In the process also change it to take an ntfs
+ inode instead of a vfs inode as parameter.
+ - Fix the definition of the CHKD ntfs record magic. It had an off by
+ two error causing it to be CHKB instead of CHKD.
+ - Fix a stupid bug in __ntfs_bitmap_set_bits_in_run() which caused the
+ count to become negative and hence we had a wild memset() scribbling
+ all over the system's ram.
2.1.23 - Implement extension of resident files and make writing safe as well as
many bug fixes, cleanups, and enhancements...
projects / linux-2.6 / blobdiff