1 files changed, 104 insertions, 16 deletions

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 1d2ad15f1533..cb86140aa2a3 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -2,20 +2,18 @@ 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
+          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...
-          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.
-          UPDATE: The above is all ok as it is due to i_sem held.  The only
-          thing that needs to be checked is ntfs_writepage() which does not
-          hold i_sem.  It cannot change i_size but it needs to cope with a
-          concurrent i_size change.
+          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.
         - 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
@@ -31,6 +29,96 @@ ToDo/Notes:
           compiled without debug.  This avoids a possible denial of service
           attack.  Thanks to Carl-Daniel Hailfinger from SuSE for pointing this
           out.
+        - Fix compilation warnings on ia64.  (Randy Dunlap)
+        - Use i_size_read() in fs/ntfs/attrib.c::ntfs_attr_set().
+        - Use i_size_read() in fs/ntfs/logfile.c::ntfs_{check,empty}_logfile().
+        - Use i_size_read() once and then use the cached value in
+          fs/ntfs/lcnalloc.c::ntfs_cluster_alloc().
+        - Use i_size_read() in fs/ntfs/file.c::ntfs_file_open().
+        - Add size_lock to the ntfs_inode structure.  This is an rw spinlock
+          and it locks against access to the inode sizes.  Note, ->size_lock
+          is also accessed from irq context so you must use the _irqsave and
+          _irqrestore lock and unlock functions, respectively.
+        - Use i_size_read() in fs/ntfs/compress.c at the start of the read and
+          use the cached value afterwards.  Cache the initialized_size in the
+          same way and protect access to the two sizes using the size_lock.
+        - Use i_size_read() in fs/ntfs/dir.c once and then use the cached
+          value afterwards.
+        - Use i_size_read() in fs/ntfs/super.c once and then use the cached
+          value afterwards.  Cache the initialized_size in the same way and
+          protect access to the two sizes using the size_lock.
+        - Minor optimization to fs/ntfs/super.c::ntfs_statfs() and its helpers.
+        - Use i_size_read() in fs/ntfs/inode.c once and then use the cached
+          value afterwards when reading the size of the bitmap inode.
+        - Use i_size_{read,write}() in fs/ntfs/{aops.c,mft.c} and protect
+          access to the i_size and other size fields using the size_lock.
+        - Implement extension of resident files in the regular file write code
+          paths (fs/ntfs/aops.c::ntfs_{prepare,commit}_write()).  At present
+          this only works until the data attribute becomes too big for the mft
+          record after which we abort the write returning -EOPNOTSUPP from
+          ntfs_prepare_write().
+        - Add disable_sparse mount option together with a per volume sparse
+          enable bit which is set appropriately and a per inode sparse disable
+          bit which is preset on some system file inodes as appropriate.
+        - Enforce that sparse support is disabled on NTFS volumes pre 3.0.
+        - Fix a bug in fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress() in
+          the creation of the unmapped runlist element for the base attribute
+          extent.
+        - Split ntfs_map_runlist() into ntfs_map_runlist() and a non-locking
+          helper ntfs_map_runlist_nolock() which is used by ntfs_map_runlist().
+          This allows us to map runlist fragments with the runlist lock already
+          held without having to drop and reacquire it around the call.  Adapt
+          all callers.
+        - Change ntfs_find_vcn() to ntfs_find_vcn_nolock() which takes a locked
+          runlist.  This allows us to find runlist elements with the runlist
+          lock already held without having to drop and reacquire it around the
+          call.  Adapt all callers.
+        - Change time to u64 in time.h::ntfs2utc() as it otherwise generates a
+          warning in the do_div() call on sparc32.  Thanks to Meelis Roos for
+          the report and analysis of the warning.
+        - Fix a nasty runlist merge bug when merging two holes.
+        - Set the ntfs_inode->allocated_size to the real allocated size in the
+          mft record for resident attributes (fs/ntfs/inode.c).
+        - Small readability cleanup to use "a" instead of "ctx->attr"
+          everywhere (fs/ntfs/inode.c).
+        - Make fs/ntfs/namei.c::ntfs_get_{parent,dentry} static and move the
+          definition of ntfs_export_ops from fs/ntfs/super.c to namei.c.  Also,
+          declare ntfs_export_ops in fs/ntfs/ntfs.h.
+        - Correct sparse file handling.  The compressed values need to be
+          checked and set in the ntfs inode as done for compressed files and
+          the compressed size needs to be used for vfs inode->i_blocks instead
+          of the allocated size, again, as done for compressed files.
+        - Add AT_EA in addition to AT_DATA to whitelist for being allowed to be
+          non-resident in fs/ntfs/attrib.c::ntfs_attr_can_be_non_resident().
+        - Add fs/ntfs/attrib.c::ntfs_attr_vcn_to_lcn_nolock() used by the new
+          write code.
+        - Fix bug in fs/ntfs/attrib.c::ntfs_find_vcn_nolock() where after
+          dropping the read lock and taking the write lock we were not checking
+          whether someone else did not already do the work we wanted to do.
+        - Rename fs/ntfs/attrib.c::ntfs_find_vcn_nolock() to
+          ntfs_attr_find_vcn_nolock() and update all callers.
+        - Add fs/ntfs/attrib.[hc]::ntfs_attr_make_non_resident().
+        - Fix sign of various error return values to be negative in
+          fs/ntfs/lcnalloc.c.
+        - Modify ->readpage and ->writepage (fs/ntfs/aops.c) so they detect and
+          handle the case where an attribute is converted from resident to
+          non-resident by a concurrent file write.
+        - Remove checks for NULL before calling kfree() since kfree() does the
+          checking itself.  (Jesper Juhl)
+        - Some utilities modify the boot sector but do not update the checksum.
+          Thus, relax the checking in fs/ntfs/super.c::is_boot_sector_ntfs() to
+          only emit a warning when the checksum is incorrect rather than
+          refusing the mount.  Thanks to Bernd Casimir for pointing this
+          problem out.
+        - Update attribute definition handling.
+        - Add NTFS_MAX_CLUSTER_SIZE and NTFS_MAX_PAGES_PER_CLUSTER constants.
+        - Use NTFS_MAX_CLUSTER_SIZE in super.c instead of hard coding 0x10000.
+        - Use MAX_BUF_PER_PAGE instead of variable sized array allocation for
+          better code generation and one less sparse warning in fs/ntfs/aops.c.
+        - Remove spurious void pointer casts from fs/ntfs/.  (Pekka Enberg)
+        - Use C99 style structure initialization after memory allocation where
+          possible (fs/ntfs/{attrib.c,index.c,super.c}).  Thanks to Al Viro and
+          Pekka Enberg.
 
 2.1.22 - Many bug and race fixes and error handling improvements.
 
@@ -1037,7 +1125,7 @@ tng-0.0.8 - 08/03/2002 - Now using BitKeeper, http://linux-ntfs.bkbits.net/
         - Further runlist 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
+        - Convert to new filesystem 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.
@@ -1333,7 +1421,7 @@ tng-0.0.1 - The first useful version.
         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
+        either. But for small or simple filesystems 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!
@@ -1341,7 +1429,7 @@ tng-0.0.1 - The first useful version.
 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
+        NTFS filesystems (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