ext4: calculate and verify checksums of directory leaf blocks

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Calculate and verify the checksums for directory leaf blocks
(i.e. blocks that only contain actual directory entries).  The
checksum lives in what looks to be an unused directory entry with a 0
name_len at the end of the block.  This scheme is not used for
internal htree nodes because the mechanism in place there only costs
one dx_entry, whereas the "empty" directory entry would cost two
dx_entries.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

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This commit is contained in:

Darrick J. Wong 2012-04-29 18:41:10 -04:00 • committed by Theodore Ts'o

parent dbe8944404

commit b0336e8d21

3 changed files with 259 additions and 15 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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12

fs/ext4/dir.c

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2

fs/ext4/ext4.h

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260

fs/ext4/namei.c

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