- obsolete

[packages/kernel.git] / 2.6.6-NTFS-2.1.9-lkml.patch

 This will update the following files:
 
 Documentation/filesystems/ntfs.txt |    2 ++
 fs/ntfs/ChangeLog                  |   14 +++++++++++++-
 fs/ntfs/Makefile                   |    2 +-
 fs/ntfs/compress.c                 |   29 ++++++++++++++++++++++-------
 4 files changed, 38 insertions(+), 9 deletions(-)
 
 through these ChangeSets:
 
 <aia21@cantab.net> (04/05/10 1.1611)
   NTFS: 2.1.9 release - Fix two bugs in the decompression engine
         in handling of corner cases.
 
 
diff -Nru a/Documentation/filesystems/ntfs.txt b/Documentation/filesystems/ntfs.txt
--- a/Documentation/filesystems/ntfs.txt        Mon May 10 10:09:16 2004
+++ b/Documentation/filesystems/ntfs.txt        Mon May 10 10:09:16 2004
@@ -273,6 +273,8 @@

 Note, a technical ChangeLog aimed at kernel hackers is in fs/ntfs/ChangeLog.

+2.1.9:
+       - Fix two bugs in handling of corner cases in the decompression engine.
 2.1.8:
        - Read the $MFT mirror and compare it to the $MFT and if the two do not
          match, force a read-only mount and do not allow read-write remounts.
diff -Nru a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
--- a/fs/ntfs/ChangeLog Mon May 10 10:09:16 2004
+++ b/fs/ntfs/ChangeLog Mon May 10 10:09:16 2004
@@ -19,7 +19,19 @@
          sufficient for synchronisation here. We then just need to make sure
          ntfs_readpage/writepage/truncate interoperate properly with us.

-2.1.8 - Handle $MFT mirror and $LogFile, improve time ihandling, and cleanups.
+2.1.9 - Fix two bugs in decompression engine.
+
+       - Fix a bug where we would not always detect that we have reached the
+         end of a compression block because we were ending at minus one byte
+         which is effectively the same as being at the end.  The fix is to
+         check whether the uncompressed buffer has been fully filled and if so
+         we assume we have reached the end of the compression block.  A big
+         thank you to Marcin Gibuła for the bug report, the assistance in
+         tracking down the bug and testing the fix.
+       - Fix a possible bug where when a compressed read is truncated to the
+         end of the file, the offset inside the last page was not truncated.
+
+2.1.8 - Handle $MFT mirror and $LogFile, improve time handling, and cleanups.

        - Use get_bh() instead of manual atomic_inc() in fs/ntfs/compress.c.
        - Modify fs/ntfs/time.c::ntfs2utc(), get_current_ntfs_time(), and
diff -Nru a/fs/ntfs/Makefile b/fs/ntfs/Makefile
--- a/fs/ntfs/Makefile  Mon May 10 10:09:16 2004
+++ b/fs/ntfs/Makefile  Mon May 10 10:09:16 2004
@@ -5,7 +5,7 @@
 ntfs-objs := aops.o attrib.o compress.o debug.o dir.o file.o inode.o logfile.o \
             mft.o mst.o namei.o super.o sysctl.o unistr.o upcase.o

-EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.8\"
+EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.9\"

 ifeq ($(CONFIG_NTFS_DEBUG),y)
 EXTRA_CFLAGS += -DDEBUG
diff -Nru a/fs/ntfs/compress.c b/fs/ntfs/compress.c
--- a/fs/ntfs/compress.c        Mon May 10 10:09:16 2004
+++ b/fs/ntfs/compress.c        Mon May 10 10:09:16 2004
@@ -197,9 +197,15 @@
 do_next_sb:
        ntfs_debug("Beginning sub-block at offset = 0x%x in the cb.",
                        cb - cb_start);
-
-       /* Have we reached the end of the compression block? */
-       if (cb == cb_end || !le16_to_cpup((u16*)cb)) {
+       /*
+        * Have we reached the end of the compression block or the end of the
+        * decompressed data?  The latter can happen for example if the current
+        * position in the compression block is one byte before its end so the
+        * first two checks do not detect it.
+        */
+       if (cb == cb_end || !le16_to_cpup((u16*)cb) ||
+                       (*dest_index == dest_max_index &&
+                       *dest_ofs == dest_max_ofs)) {
                int i;

                ntfs_debug("Completed. Returning success (0).");
@@ -501,7 +507,7 @@
         */
        unsigned int nr_pages = (end_vcn - start_vcn) <<
                        vol->cluster_size_bits >> PAGE_CACHE_SHIFT;
-       unsigned int xpage, max_page, cur_page, cur_ofs, i;
+       unsigned int xpage, max_page, max_ofs, cur_page, cur_ofs, i;
        unsigned int cb_clusters, cb_max_ofs;
        int block, max_block, cb_max_page, bhs_size, nr_bhs, err = 0;
        struct page **pages;
@@ -544,8 +550,11 @@
         */
        max_page = ((VFS_I(ni)->i_size + PAGE_CACHE_SIZE - 1) >>
                        PAGE_CACHE_SHIFT) - offset;
-       if (nr_pages < max_page)
+       max_ofs = (VFS_I(ni)->i_size + PAGE_CACHE_SIZE - 1) & ~PAGE_CACHE_MASK;
+       if (nr_pages < max_page) {
                max_page = nr_pages;
+               max_ofs = 0;
+       }
        for (i = 0; i < max_page; i++, offset++) {
                if (i != xpage)
                        pages[i] = grab_cache_page_nowait(mapping, offset);
@@ -713,8 +722,14 @@
        cb_max_page >>= PAGE_CACHE_SHIFT;

        /* Catch end of file inside a compression block. */
-       if (cb_max_page > max_page)
-               cb_max_page = max_page;
+       if (cb_max_page >= max_page) {
+               if (cb_max_page > max_page) {
+                       cb_max_page = max_page;
+                       cb_max_ofs = max_ofs;
+               } else if (cb_max_ofs > max_ofs) {
+                       cb_max_ofs = max_ofs;
+               }
+       }

        if (vcn == start_vcn - cb_clusters) {
                /* Sparse cb, zero out page range overlapping the cb. */

===================================================================

This BitKeeper patch contains the following changesets:
1.1611
## Wrapped with gzip_uu ##


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-
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