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After the fix for bug #922847:
e2fsprogs-1.41.12-e2fsck-overlapping-extents.patch
e2fsck: detect invalid extents at the end of an extent-block
e2fsck began incorrectly flagging uninitialized extents past EOF as invalid:
Testcase:
# for I in `seq 0 2 8`; do fallocate -o ${I}m -l 1m test/testfile ; done
# fallocate -n -o 12m -l 1m test/testfile
# umount test
# e2fsck -fy /dev/sdb1
e2fsck 1.41.12 (17-May-2010)
Pass 1: Checking inodes, blocks, and sizes
Inode 12, end of extent exceeds allowed value
(logical block 3072, physical block 34304, len 256)
Clear? yes
Inode 12, i_blocks is 12296, should be 10248. Fix? yes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(34304--34559)
Fix? yes
Free blocks count wrong for group #1 (31059, counted=31315).
Fix? yes
Free blocks count wrong (669199, counted=669455).
Fix? yes
/dev/sdb1: ***** FILE SYSTEM WAS MODIFIED *****
/dev/sdb1: 12/174944 files (0.0% non-contiguous), 29681/699136 blocks
Eric Whitney has a patch on the list to resolve this issue.
Reproduced with e2fsprogs-1.41.12-15.el6 which contains the fix for bug 922847.
=== fsck.log ===
e2fsck 1.41.12 (17-May-2010)
Pass 1: Checking inodes, blocks, and sizes
Inode 12, end of extent exceeds allowed value
(logical block 12288, physical block 20481, len 1024)
Clear? no
Inode 12, i_blocks is 12292, should be 10244. Fix? no
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(20481--21504)
Fix? no
/dev/loop0: ********** WARNING: Filesystem still has errors **********
/dev/loop0: 12/32768 files (8.3% non-contiguous), 15933/131072 blocks
Verified with e2fsprogs-1.41.12-18.el6
Set to VERIFIED
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2013-1689.html