ToDo/Notes:
- Find and fix bugs.
- - 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.
+ - The only places in the kernel where a file is resized are
+ ntfs_file_write*() and ntfs_truncate() for both of which i_mutex is
+ held. Just have to be careful in read-/writepage and other helpers
+ not running under i_mutex that we play nice. Also need to be careful
+ with initialized_size extension in ntfs_file_write*() and writepage.
+ UPDATE: The only things that need to be checked are 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 filling in of holes in aops.c::ntfs_writepage() and its
+ helpers.
- 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.
+2.1.27 - Various bug fixes and cleanups.
+
+ - Fix two compiler warnings on Alpha. Thanks to Andrew Morton for
+ reporting them.
+ - Fix an (innocent) off-by-one error in the runlist code.
+ - Fix a buggette in an "should be impossible" case handling where we
+ continued the attribute lookup loop instead of aborting it.
+ - Use buffer_migrate_page() for the ->migratepage function of all ntfs
+ address space operations.
+ - Fix comparison of $MFT and $MFTMirr to not bail out when there are
+ unused, invalid mft records which are the same in both $MFT and
+ $MFTMirr.
+ - Add support for sparse files which have a compression unit of 0.
+ - Remove all the make_bad_inode() calls. This should only be called
+ from read inode and new inode code paths.
+
+2.1.26 - Minor bug fixes and updates.
+
+ - Fix a potential overflow in file.c where a cast to s64 was missing in
+ a left shift of a page index.
+ - The struct inode has had its i_sem semaphore changed to a mutex named
+ i_mutex.
+ - We have struct kmem_cache now so use it instead of the typedef
+ kmem_cache_t. (Pekka Enberg)
+ - Implement support for sector sizes above 512 bytes (up to the maximum
+ supported by NTFS which is 4096 bytes).
+ - Do more detailed reporting of why we cannot mount read-write by
+ special casing the VOLUME_MODIFIED_BY_CHKDSK flag.
+ - Miscellaneous updates to layout.h.
+ - Cope with attribute list attribute having invalid flags. Windows
+ copes with this and even chkdsk does not detect or fix this so we
+ have to cope with it, too. Thanks to Pawel Kot for reporting the
+ problem.
+
+2.1.25 - (Almost) fully implement write(2) and truncate(2).
+
+ - 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 and it never creates sparse files
+ at least for the moment (making a file sparse requires us to modify
+ its directory entries and we do not support directory operations at
+ the moment). Also, support for highly fragmented files, i.e. ones
+ whose data attribute is split across multiple extents, is severly
+ limited. When such a case is encountered, EOPNOTSUPP is returned.
+ - 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).
+ - In attrib.c::ntfs_attr_set() call balance_dirty_pages_ratelimited()
+ and cond_resched() in the main loop as we could be dirtying a lot of
+ pages and this ensures we play nice with the VM and the system as a
+ whole.
+ - Implement file operations ->write, ->aio_write, ->writev for regular
+ files. This replaces the old use of generic_file_write(), et al and
+ the address space operations ->prepare_write and ->commit_write.
+ This means that both sparse and non-sparse (unencrypted and
+ uncompressed) files can now be extended using the normal write(2)
+ code path. There are two limitations at present and these are that
+ we never create sparse files and that we only have limited support
+ for highly fragmented files, i.e. ones whose data attribute is split
+ across multiple extents. When such a case is encountered,
+ EOPNOTSUPP is returned.
+ - $EA attributes can be both resident and non-resident.
+ - Use %z for size_t to fix compilation warnings. (Andrew Morton)
+ - Fix compilation warnings with gcc-4.0.2 on SUSE 10.0.
+ - Document extended attribute ($EA) NEED_EA flag. (Based on libntfs
+ patch by Yura Pakhuchiy.)
+
2.1.24 - Lots of bug fixes and support more clean journal states.
- Support journals ($LogFile) which have been modified by chkdsk. This
single one of them had an mst error. (Thanks to Ken MacFerrin for
the bug report.)
- Fix error handling in fs/ntfs/quota.c::ntfs_mark_quotas_out_of_date()
- where we failed to release i_sem on the $Quota/$Q attribute inode.
+ where we failed to release i_mutex on the $Quota/$Q attribute inode.
- Fix bug in handling of bad inodes in fs/ntfs/namei.c::ntfs_lookup().
- Add mapping of unmapped buffers to all remaining code paths, i.e.
fs/ntfs/aops.c::ntfs_write_mst_block(), mft.c::ntfs_sync_mft_mirror(),
clusters. (Philipp Thomas)
- attrib.c::load_attribute_list(): Fix bug when initialized_size is a
multiple of the block_size but not the cluster size. (Szabolcs
- Szakacsits <szaka@sienet.hu>)
+ Szakacsits)
2.1.2 - Important bug fixes aleviating the hangs in statfs.
- Add handling for initialized_size != data_size in compressed files.
- Reduce function local stack usage from 0x3d4 bytes to just noise in
- fs/ntfs/upcase.c. (Randy Dunlap <rddunlap@osdl.ord>)
+ fs/ntfs/upcase.c. (Randy Dunlap)
- Remove compiler warnings for newer gcc.
- Pages are no longer kmapped by mm/filemap.c::generic_file_write()
around calls to ->{prepare,commit}_write. Adapt NTFS appropriately
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).
+ only caller of ->readdir() is vfs_readdir() which holds i_mutex
+ during the call, and i_mutex 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
+ default_llseek()) as this downs i_mutex 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().
git.openpandora.org / pandora-kernel.git / blobdiff