changelog

来自「Linux Kernel 2.6.9 for OMAP1710」· 代码 · 共 1,154 行 · 第 1/5 页

ToDo/Notes:
	- Find and fix bugs.
	- Checkpoint or disable the user space journal ($UsnJrnl).
	- In between ntfs_prepare/commit_write, need exclusion between
	  simultaneous file extensions. Need perhaps an NInoResizeUnderway()
	  flag which we can set in ntfs_prepare_write() and clear again in
	  ntfs_commit_write(). Just have to be careful in readpage/writepage,
	  as well as in truncate, that we play nice... We might need to have
	  a data_size field in the ntfs_inode to store the real attribute
	  length. Also need to be careful with initialized_size extention in
	  ntfs_prepare_write. Basically, just be _very_ careful in this code...
	  OTOH, perhaps i_sem, which is held accross generic_file_write is
	  sufficient for synchronisation here. We then just need to make sure
	  ntfs_readpage/writepage/truncate interoperate properly with us.
	- 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
	  inode having been discarded already.  Whether this can actually ever
	  happen is unclear however so it is worth waiting until someone hits
	  the problem.
	- Enable the code for setting the NT4 compatibility flag when we start
	  making NTFS 1.2 specific modifications.

2.1.20 - Fix a stupid bug in ntfs_attr_reinit_search_ctx().

	- Fix stupid bug in fs/ntfs/attrib.c::ntfs_attr_reinit_search_ctx()
	  where we did not clear ctx->al_entry but it was still set due to
	  changes in ntfs_attr_lookup() and ntfs_external_attr_find() in
	  particular.
	- Fix another stupid bug in fs/ntfs/attrib.c::ntfs_external_attr_find()
	  where we forgot to unmap the extent mft record when we had finished
	  enumerating an attribute which caused a bug check to trigger when the
	  VFS calls ->clear_inode.

2.1.19 - Many cleanups, improvements, and a minor bug fix.

	- Update ->setattr (fs/ntfs/inode.c::ntfs_setattr()) to refuse to
	  change the uid, gid, and mode of an inode as we do not support NTFS
	  ACLs yet.
	- Remove BKL use from ntfs_setattr() syncing up with the rest of the
	  kernel.
	- Get rid of the ugly transparent union in fs/ntfs/dir.c::ntfs_readdir()
	  and ntfs_filldir() as per suggestion from Al Viro.
	- Change '\0' and L'\0' to simply 0 as per advice from Linus Torvalds.
	- Update ->truncate (fs/ntfs/inode.c::ntfs_truncate()) to check if the
	  inode size has changed and to only output an error if so.
	- Rename fs/ntfs/attrib.h::attribute_value_length() to ntfs_attr_size().
	- Add le{16,32,64} as well as sle{16,32,64} data types to
	  fs/ntfs/types.h.
	- Change ntfschar to be le16 instead of u16 in fs/ntfs/types.h.
	- Add le versions of VCN, LCN, and LSN called leVCN, leLCN, and leLSN,
	  respectively, to fs/ntfs/types.h.
	- Update endianness conversion macros in fs/ntfs/endian.h to use the
	  new types as appropriate.
	- Do proper type casting when using sle64_to_cpup() in fs/ntfs/dir.c
	  and index.c.
	- Add leMFT_REF data type to fs/ntfs/layout.h.
	- Update all NTFS header files with the new little endian data types.
	  Affected files are fs/ntfs/layout.h, logfile.h, and time.h.
	- Do proper type casting when using ntfs_is_*_recordp() in
	  fs/ntfs/logfile.c, mft.c, and super.c. 
	- Fix all the sparse bitwise warnings.  Had to change all the typedef
	  enums storing little endian values to simple enums plus a typedef for
	  the datatype to make sparse happy.
	- Fix a bug found by the new sparse bitwise warnings where the default
	  upcase table was defined as a pointer to wchar_t rather than ntfschar
	  in fs/ntfs/ntfs.h and super.c.
	- Change {const_,}cpu_to_le{16,32}(0) to just 0 as suggested by Al Viro.

2.1.18 - Fix scheduling latencies at mount time as well as an endianness bug.

	- Remove vol->nr_mft_records as it was pretty meaningless and optimize
	  the calculation of total/free inodes as used by statfs().
	- Fix scheduling latencies in ntfs_fill_super() by dropping the BKL
	  because the code itself is using the ntfs_lock semaphore which
	  provides safe locking.  (Ingo Molnar)
	- Fix a potential bug in fs/ntfs/mft.c::map_extent_mft_record() that
	  could occur in the future for when we start closing/freeing extent
	  inodes if we don't set base_ni->ext.extent_ntfs_inos to NULL after
	  we free it.
	- Rename {find,lookup}_attr() to ntfs_attr_{find,lookup}() as well as
	  find_external_attr() to ntfs_external_attr_find() to cleanup the
	  namespace a bit and to be more consistent with libntfs.
	- Rename {{re,}init,get,put}_attr_search_ctx() to
	  ntfs_attr_{{re,}init,get,put}_search_ctx() as well as the type
	  attr_search_context to ntfs_attr_search_ctx.
	- Force use of ntfs_attr_find() in ntfs_attr_lookup() when searching
	  for the attribute list attribute itself.
	- Fix endianness bug in ntfs_external_attr_find().
	- Change ntfs_{external_,}attr_find() to return 0 on success, -ENOENT
	  if the attribute is not found, and -EIO on real error.  In the case
	  of -ENOENT, the search context is updated to describe the attribute
	  before which the attribute being searched for would need to be
	  inserted if such an action were to be desired and in the case of
	  ntfs_external_attr_find() the search context is also updated to
	  indicate the attribute list entry before which the attribute list
	  entry of the attribute being searched for would need to be inserted
	  if such an action were to be desired.  Also make ntfs_find_attr()
	  static and remove its prototype from attrib.h as it is not used
	  anywhere other than attrib.c.  Update ntfs_attr_lookup() and all
	  callers of ntfs_{external,}attr_{find,lookup}() for the new return
	  values.
	- Minor cleanup of fs/ntfs/inode.c::ntfs_init_locked_inode().

2.1.17 - Fix bugs in mount time error code paths and other updates.

	- Implement bitmap modification code (fs/ntfs/bitmap.[hc]).  This
	  includes functions to set/clear a single bit or a run of bits.
	- Add fs/ntfs/attrib.[hc]::ntfs_find_vcn() which returns the locked
	  runlist element containing a particular vcn.  It also takes care of
	  mapping any needed runlist fragments.
	- Implement cluster (de-)allocation code (fs/ntfs/lcnalloc.[hc]).
	- Load attribute definition table from $AttrDef at mount time.
	- Fix bugs in mount time error code paths involving (de)allocation of
	  the default and volume upcase tables.
	- Remove ntfs_nr_mounts as it is no longer used.

2.1.16 - Implement access time updates, file sync, async io, and read/writev.

	- Add support for readv/writev and aio_read/aio_write (fs/ntfs/file.c).
	  This is done by setting the appropriate file operations pointers to
	  the generic helper functions provided by mm/filemap.c.
	- Implement fsync, fdatasync, and msync both for files (fs/ntfs/file.c)
	  and directories (fs/ntfs/dir.c).
	- Add support for {a,m,c}time updates to inode.c::ntfs_write_inode().
	  Note, except for the root directory and any other system files opened
	  by the user, the system files will not have their access times
	  updated as they are only accessed at the inode level an hence the
	  file level functions which cause the times to be updated are never
	  invoked.

2.1.15 - Invalidate quotas when (re)mounting read-write.

	- Add new element itype.index.collation_rule to the ntfs inode
	  structure and set it appropriately in ntfs_read_locked_inode().
	- Implement a new inode type "index" to allow efficient access to the
	  indices found in various system files and adapt inode handling
	  accordingly (fs/ntfs/inode.[hc]).  An index inode is essentially an
	  attribute inode (NInoAttr() is true) with an attribute type of
	  AT_INDEX_ALLOCATION.  As such, it is no longer allowed to call
	  ntfs_attr_iget() with an attribute type of AT_INDEX_ALLOCATION as
	  there would be no way to distinguish between normal attribute inodes
	  and index inodes.  The function to obtain an index inode is
	  ntfs_index_iget() and it uses the helper function
	  ntfs_read_locked_index_inode().  Note, we do not overload
	  ntfs_attr_iget() as indices consist of multiple attributes so using
	  ntfs_attr_iget() to obtain an index inode would be confusing.
	- Ensure that there is no overflow when doing page->index <<
	  PAGE_CACHE_SHIFT by casting page->index to s64 in fs/ntfs/aops.c.
	- Use atomic kmap instead of kmap() in fs/ntfs/aops.c::ntfs_read_page()
	  and ntfs_read_block().
	- Use case sensitive attribute lookups instead of case insensitive ones.
	- Lock all page cache pages belonging to mst protected attributes while
	  accessing them to ensure we never see corrupt data while the page is
	  under writeout.
	- Add framework for generic ntfs collation (fs/ntfs/collation.[hc]).
	  We have ntfs_is_collation_rule_supported() to check if the collation
	  rule you want to use is supported and ntfs_collation() which actually
	  collates two data items.  We currently only support COLLATION_BINARY
	  and COLLATION_NTOFS_ULONG but support for other collation rules will
	  be added as the need arises.
	- Add a new type, ntfs_index_context, to allow retrieval of an index
	  entry using the corresponding index key.  To get an index context,
	  use ntfs_index_ctx_get() and to release it, use ntfs_index_ctx_put().
	  This also adds a new slab cache for the index contexts.  To lookup a
	  key in an index inode, use ntfs_index_lookup().  After modifying an
	  index entry, call ntfs_index_entry_flush_dcache_page() followed by
	  ntfs_index_entry_mark_dirty() to ensure the changes are written out
	  to disk.  For details see fs/ntfs/index.[hc].  Note, at present, if
	  an index entry is in the index allocation attribute rather than the
	  index root attribute it will not be written out (you will get a
	  warning message about discarded changes instead).
	- Load the quota file ($Quota) and check if quota tracking is enabled
	  and if so, mark the quotas out of date.  This causes windows to
	  rescan the volume on boot and update all quota entries.
	- Add a set_page_dirty address space operation for ntfs_m[fs]t_aops.
	  It is simply set to __set_page_dirty_nobuffers() to make sure that
	  running set_page_dirty() on a page containing mft/ntfs records will
	  not affect the dirty state of the page buffers.
	- Add fs/ntfs/index.c::__ntfs_index_entry_mark_dirty() which sets all
	  buffers that are inside the ntfs record in the page dirty after which
	  it sets the page dirty.  This allows ->writepage to only write the
	  dirty index records rather than having to write all the records in
	  the page.  Modify fs/ntfs/index.h::ntfs_index_entry_mark_dirty() to
	  use this rather than __set_page_dirty_nobuffers().
	- Implement fs/ntfs/aops.c::ntfs_write_mst_block() which enables the
	  writing of page cache pages belonging to mst protected attributes
	  like the index allocation attribute in directory indices and other
	  indices like $Quota/$Q, etc.  This means that the quota is now marked
	  out of date on all volumes rather than only on ones where the quota
	  defaults entry is in the index root attribute of the $Quota/$Q index.

2.1.14 - Fix an NFSd caused deadlock reported by several users.

	- Modify fs/ntfs/ntfs_readdir() to copy the index root attribute value
	  to a buffer so that we can put the search context and unmap the mft
	  record before calling the filldir() callback.  We need to do this
	  because of NFSd which calls ->lookup() from its filldir callback()
	  and this causes NTFS to deadlock as ntfs_lookup() maps the mft record
	  of the directory and since ntfs_readdir() has got it mapped already
	  ntfs_lookup() deadlocks.

2.1.13 - Enable overwriting of resident files and housekeeping of system files.

	- Implement writing of mft records (fs/ntfs/mft.[hc]), which includes
	  keeping the mft mirror in sync with the mft when mirrored mft records
	  are written.  The functions are write_mft_record{,_nolock}().  The
	  implementation is quite rudimentary for now with lots of things not
	  implemented yet but I am not sure any of them can actually occur so
	  I will wait for people to hit each one and only then implement it.
	- Commit open system inodes at umount time.  This should make it
	  virtually impossible for sync_mft_mirror_umount() to ever be needed.
	- Implement ->write_inode (fs/ntfs/inode.c::ntfs_write_inode()) for the
	  ntfs super operations.  This gives us inode writing via the VFS inode
	  dirty code paths.  Note:  Access time updates are not implemented yet.
	- Implement fs/ntfs/mft.[hc]::{,__}mark_mft_record_dirty() and make
	  fs/ntfs/aops.c::ntfs_writepage() and ntfs_commit_write() use it, thus
	  finally enabling resident file overwrite!  (-8  This also includes a
	  placeholder for ->writepage (ntfs_mft_writepage()), which for now
	  just redirties the page and returns.  Also, at umount time, we for
	  now throw away all mft data page cache pages after the last call to
	  ntfs_commit_inode() in the hope that all inodes will have been
	  written out by then and hence no dirty (meta)data will be lost.  We
	  also check for this case and emit an error message telling the user
	  to run chkdsk.
	- Use set_page_writeback() and end_page_writeback() in the resident
	  attribute code path of fs/ntfs/aops.c::ntfs_writepage() otherwise
	  the radix-tree tag PAGECACHE_TAG_DIRTY remains set even though the
	  page is clean.
	- Implement ntfs_mft_writepage() so it now checks if any of the mft
	  records in the page are dirty and if so redirties the page and