[PATCH 34/37] Re: [2.6-BK-URL] NTFS: 2.1.21 - Big update with race/bugfixes

[Anton Altaparmakov]

This is patch 34/37 in the series.  It contains the following ChangeSet:

<aia21@xxxxxxxxxx> (04/10/15 1.2054)
   NTFS: Modify fs/ntfs/mft.c::map_extent_mft_record() to only verify the mft
         record sequence number if it is specified (i.e. not zero).
   
   Signed-off-by: Anton Altaparmakov <aia21@xxxxxxxxxx>

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/, http://www-stu.christs.cam.ac.uk/~aia21/

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

diff -Nru a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
--- a/fs/ntfs/ChangeLog	2004-10-19 10:15:10 +01:00
+++ b/fs/ntfs/ChangeLog	2004-10-19 10:15:10 +01:00
@@ -134,6 +134,8 @@
 	  that resulted due to #includes and header file interdependencies.
 	- Simplify setup of i_mode in fs/ntfs/inode.c::ntfs_read_locked_inode().
 	- Add helpers fs/ntfs/layout.h::MK_MREF() and MK_LE_MREF().
+	- Modify fs/ntfs/mft.c::map_extent_mft_record() to only verify the mft
+	  record sequence number if it is specified (i.e. not zero).
 
 2.1.20 - Fix two stupid bugs introduced in 2.1.18 release.
 
diff -Nru a/fs/ntfs/mft.c b/fs/ntfs/mft.c
--- a/fs/ntfs/mft.c	2004-10-19 10:15:10 +01:00
+++ b/fs/ntfs/mft.c	2004-10-19 10:15:10 +01:00
@@ -302,8 +302,8 @@
 		ntfs_clear_extent_inode(ni);
 		goto map_err_out;
 	}
-	/* Verify the sequence number. */
-	if (unlikely(le16_to_cpu(m->sequence_number) != seq_no)) {
+	/* Verify the sequence number if it is present. */
+	if (seq_no && (le16_to_cpu(m->sequence_number) != seq_no)) {
 		ntfs_error(base_ni->vol->sb, "Found stale extent mft "
 				"reference! Corrupt file system. Run chkdsk.");
 		destroy_ni = TRUE;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/