ocfs2: Add directory block trailers.

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Future ocfs2 features metaecc and indexed directories need to store a
little bit of data in each dirblock.  For compatibility, we place this
in a trailer at the end of the dirblock.  The trailer plays itself as an
empty dirent, so that if the features are turned off, it can be reused
without requiring a tunefs scan.

This code adds the trailer and validates it when the block is read in.

[ Mark is the original author, but I reinserted this code before his
  dir index work.  -- Joel ]

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

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This commit is contained in:

Mark Fasheh 2008-12-10 17:36:25 -08:00

parent 8400897249

commit 87d35a74b1

3 changed files with 215 additions and 14 deletions

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197

fs/ocfs2/dir.c

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3

fs/ocfs2/ocfs2.h

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29

fs/ocfs2/ocfs2_fs.h

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