btrfsck pretends that it finished okay (returns zero), but the filesystem is not fixed

btrfs-progs-3.12-1.el7.x86_64


# btrfsck --repair --init-csum-tree --init-extent-tree btrfs ; echo $?
enabling repair mode
Creating a new CRC tree
parent transid verify failed on 29360128 wanted 80030 found 80039
parent transid verify failed on 29360128 wanted 80030 found 80039
parent transid verify failed on 29360128 wanted 80030 found 80039
parent transid verify failed on 29360128 wanted 80030 found 80039
Ignoring transid failure
parent transid verify failed on 4420636672 wanted 80040 found 80024
parent transid verify failed on 4420636672 wanted 80040 found 80024
parent transid verify failed on 4420636672 wanted 80040 found 80024
parent transid verify failed on 4420636672 wanted 80040 found 80024
Ignoring transid failure
Checking filesystem on btrfs
UUID: 9b9d89e3-3c2f-44ac-a1f6-0b0a1c730a08
Creating a new extent tree
Failed to find [29376512, 168, 4096]
btrfs unable to find ref byte nr 29376512 parent 0 root 1  owner 1 offset 0
Failed to find [29368320, 168, 4096]
btrfs unable to find ref byte nr 29368320 parent 0 root 1  owner 0 offset 1
checking extents
Reinit crc root
Failed to find [29372416, 168, 4096]
btrfs unable to find ref byte nr 29372416 parent 0 root 2  owner 0 offset 0
Failed to find [29364224, 168, 4096]
btrfs unable to find ref byte nr 29364224 parent 0 root 1  owner 1 offset 0
found 0 bytes used err is 0
total csum bytes: 0
total tree bytes: 0
total fs tree bytes: 0
total extent tree bytes: 0
btree space waste bytes: 0
file data blocks allocated: 0
 referenced 0
Btrfs v3.12
0

# btrfsck btrfs ; echo $?
parent transid verify failed on 29360128 wanted 80030 found 80041
parent transid verify failed on 29360128 wanted 80030 found 80041
parent transid verify failed on 29360128 wanted 80030 found 80041
parent transid verify failed on 29360128 wanted 80030 found 80041
Ignoring transid failure
parent transid verify failed on 4420636672 wanted 80042 found 80024
parent transid verify failed on 4420636672 wanted 80042 found 80024
parent transid verify failed on 4420636672 wanted 80042 found 80024
parent transid verify failed on 4420636672 wanted 80042 found 80024
Ignoring transid failure
Checking filesystem on btrfs
UUID: 9b9d89e3-3c2f-44ac-a1f6-0b0a1c730a08
checking extents
Block Group[0, 4194304] existed.
Block Group[4194304, 8388608] existed.
Block Group[12582912, 8388608] existed.
Block Group[20971520, 8388608] existed.
Block Group[29360128, 1073741824] existed.
Block Group[1103101952, 1073741824] existed.
Block Group[2176843776, 1073741824] existed
...
root 18446744073709551607 inode 22577938432 errors 1, no inode item
root 18446744073709551607 inode 23651680256 errors 1, no inode item
root 18446744073709551607 inode 24725422080 errors 1, no inode item
root 18446744073709551607 inode 25799163904 errors 1, no inode item
root 18446744073709551607 inode 18446744073709551607 errors 1, no inode item
warning line 2023
found 282614853 bytes used err is 1
total csum bytes: 0
total tree bytes: 281657344
total fs tree bytes: 281620480
total extent tree bytes: 4096
btree space waste bytes: 71128625
file data blocks allocated: 27803508736
 referenced 12237398016
Btrfs v3.12
1



+++ This bug was initially created as a clone of Bug #1044456 +++

Description of problem:
I had a hardware problem - the disk got disconnected and reconnected on the bus. Afterwards, kernel reported some oops and remounted the filesystem read-only. Everything worked, I could read any file without problem.
Unfortunately, after the reboot, I'm no longer able to mount the filesystem.
Trying to run btrfsck on it with various options, it is unable to repair the filesystem, although it pretends it did - repair ends without error, yet on subsequent run I get nonzero exit code (and bunch of errors on the console).

Version-Release number of selected component (if applicable):
btrfs-progs-3.12-1.fc19.x86_64

How reproducible:
always

Steps to Reproduce:
1. btrfsck --repair /the/path
2. btrfsck /the/path

Actual results:
1. although some problems are reported during the run, it ends with success
2. it reports errors and the filesystem is not mountable

Expected results:
everything gets fixed, no further errors

Additional info:
I got an image of the filesystem in question, but it is about 4 GB compressed / from 600 GB (almost empty) disk uncompressed ...
Unfortunately, as I haven't expected such issues, I did the copy only after messing with btrfsck --init-extent-tree and --init-csum-tree.
Is there any place I can upload it to for examination?