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<p class="MsoPlainText">Hello,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">There is a problem in XFS: xfs_repair deletes files after power cut because of “data fork in rt inode x claims used rt block y”<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Scenario:<o:p></o:p></p>
<p class="MsoPlainText">Empty XFS partition and real-time partition with extent size 3008 sectors.<o:p></o:p></p>
<p class="MsoPlainText">1. In a loop simultaneously: <o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">a. 2 threads simultaneously write 1 stream file in real time partition
<o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">b. 1 thread writes 3 files into data partition.<o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">c. 1 thread makes holes in the stream files
<o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">d. In the middle of the loop switch off the disk power.<o:p></o:p></p>
<p class="MsoPlainText">2. Drop caches ("echo 3>/proc/sys/vm/drop_caches")<o:p></o:p></p>
<p class="MsoPlainText">3. Unmount XFS<o:p></o:p></p>
<p class="MsoPlainText">4. Switch the disk power on<o:p></o:p></p>
<p class="MsoPlainText">5. Mount XFS (to replay log)<o:p></o:p></p>
<p class="MsoPlainText">6. Unmount XFS<o:p></o:p></p>
<p class="MsoPlainText">7. Repair XFS<o:p></o:p></p>
<p class="MsoPlainText">8. Mount XFS<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">After the first mount (step 5) stream file exist in real time partition.<o:p></o:p></p>
<p class="MsoPlainText">After the second mount (step 8) stream file is absent because is deleted by repair (see attached repair_log):<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span style="color:red">data fork in rt inode 197 claims used rt block 202731<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">bad data fork in inode 197<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">cleared inode 197<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">…<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">entry "0.STR" in shortform directory 195 references free inode 197<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">junking entry "0.STR" in directory inode 195<o:p></o:p></span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Seems to be the xfs_repair bug because the streams files bitmap after the first mount seems to be OK (see attached bitmap1), without overlapped extents.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The only file in RT partition 0.STR:<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">/rt/000000R0.DIR/0.STR:<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 0: [0..144383]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 1: [144384..147391]: 607625024..607628031<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 2: [147392..291775]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 3: [291776..294783]: 607772416..607775423<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 4: [294784..436159]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 5: [436160..439167]: 607916800..607919807<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 6: [439168..583551]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 7: [583552..586559]: 608064192..608067199<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8: [586560..727935]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 9: [727936..730943]: 608208576..608211583<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 10: [730944..875327]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 11: [875328..878335]: 608355968..608358975<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 12: [878336..1019711]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 13: [1019712..1022719]: 608500352..608503359<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 14: [1022720..1167103]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 15: [1167104..1170111]: 608647744..608650751<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 16: [1170112..1311487]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 17: [1311488..1314495]: 608792128..608795135<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 18: [1314496..1458879]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 19: [1458880..1461887]: 608939520..608942527<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 20: [1461888..1603263]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 21: [1603264..1606271]: 609083904..609086911<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 22: [1606272..1750655]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 23: [1750656..1753663]: 609231296..609234303<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 24: [1753664..1895039]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 25: [1895040..1898047]: 609375680..609378687<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 26: [1898048..2042431]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 27: [2042432..2045439]: 609523072..609526079<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 28: [2045440..2186815]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 29: [2186816..2189823]: 609667456..609670463<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 30: [2189824..2334207]: hole<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 31: [2334208..2334719]: 609814848..609815359<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 32: [2334720..3853247]: 609815360..611333887<o:p></o:p></span></p>
<p class="MsoPlainText">The only strange thing is that 2 the last extents are contiguous and could be united into 1 extent.<o:p></o:p></p>
<p class="MsoPlainText">It is strange but is not a good reason to erase the file:<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">data fork in rt inode 197 claims used rt block 202731<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">bad data fork in inode 197<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">cleared inode 197<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">…<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">entry "0.STR" in shortform directory 195 references free inode 197<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">junking entry "0.STR" in directory inode 195<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"><o:p> </o:p></span></p>
<p class="MsoPlainText">Block 202731corresponds to sector 202731* 3008 = 609814848, beginning of 31th extent.<o:p></o:p></p>
<p class="MsoPlainText">This block is not used in other extents, so it is not an error.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">• kernel version (uname -a):<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">Linux SZUbuntu 3.10.4-031004-generic #201307282043 SMP Mon Jul 29 00:52:09 UTC 2013 i686 i686 i686 GNU/Linux<o:p></o:p></span></p>
<p class="MsoPlainText">• xfsprogs version (xfs_repair -V)<o:p></o:p></p>
<p class="MsoPlainText" style="text-indent:36.0pt"><span style="color:red">xfs_repair version 3.1.9<o:p></o:p></span></p>
<p class="MsoPlainText">• number of CPUs<span style="color:red">: 1 Core 2 Duo<o:p></o:p></span></p>
<p class="MsoPlainText">• contents of /proc/meminfo<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">MemTotal: 1989360 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">MemFree: 134036 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Buffers: 36512 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Cached: 1208408 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">SwapCached: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Active: 790032 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Inactive: 990384 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Active(anon): 621884 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Inactive(anon): 582020 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Active(file): 168148 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Inactive(file): 408364 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Unevictable: 32 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Mlocked: 32 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HighTotal: 1174216 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HighFree: 55364 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">LowTotal: 815144 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">LowFree: 78672 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">SwapTotal: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">SwapFree: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Dirty: 12 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Writeback: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">AnonPages: 535536 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Mapped: 171040 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Shmem: 668400 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Slab: 42020 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">SReclaimable: 23712 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">SUnreclaim: 18308 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">KernelStack: 4000 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">PageTables: 11120 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">NFS_Unstable: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Bounce: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">WritebackTmp: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">CommitLimit: 994680 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Committed_AS: 4103576 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">VmallocTotal: 122880 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">VmallocUsed: 20204 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">VmallocChunk: 61320 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HardwareCorrupted: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">AnonHugePages: 0 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HugePages_Total: 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HugePages_Free: 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HugePages_Rsvd: 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">HugePages_Surp: 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">Hugepagesize: 2048 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">DirectMap4k: 14328 kB<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">DirectMap2M: 899072 kB<o:p></o:p></span></p>
<p class="MsoPlainText">• contents of /proc/mounts<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">rootfs / rootfs rw 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">udev /dev devtmpfs rw,relatime,size=986132k,nr_inodes=199513,mode=755 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=198936k,mode=755 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">/dev/disk/by-uuid/2bd39f09-5ca0-41a5-a4af-1f5985fb1f69 / ext4 rw,relatime,errors=remount-ro,data=ordered 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /sys/fs/cgroup tmpfs rw,relatime,size=4k,mode=755 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /sys/fs/fuse/connections fusectl rw,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /sys/kernel/debug debugfs rw,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /sys/kernel/security securityfs rw,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /run/shm tmpfs rw,nosuid,nodev,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">none /run/user tmpfs rw,nosuid,nodev,noexec,relatime,size=102400k,mode=755 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">rpc_pipefs /run/rpc_pipefs rpc_pipefs rw,relatime 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">gvfsd-fuse /run/user/szak/gvfs fuse.gvfsd-fuse rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">10.63.7.58:/ms/stb_storage/7401_fs/build/szak /mnt/nfs nfs rw,relatime,vers=3,rsize=131072,wsize=131072,namle55,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.63.7.58,mountvers=3,mountport=1234,mountproudp,local_lock=all,addr=10.63.7.58
0 0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">/dev/sdc2 /rt xfs rw,relatime,attr2,inode64,rtdev=/dev/sdc3,noquota 0 0<o:p></o:p></span></p>
<p class="MsoPlainText">• contents of /proc/partitions<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">major minor #blocks name<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 0 976762584 sda<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 1 477894656 sda1<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 2 488381144 sda2<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 3 10485760 sda3<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 11 0 1048575 sr0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 16 78156288 sdb<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 17 248832 sdb1<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 18 1 sdb2<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 21 77904896 sdb5<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">252 0 75812864 dm-0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">252 1 2088960 dm-1<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 32 2930266584 sdc<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 33 976561152 sdc1<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 34 9765888 sdc2<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 8 35 1943938503 sdc3<o:p></o:p></span></p>
<p class="MsoPlainText">• RAID layout (hardware and/or software):<o:p></o:p></p>
<p class="MsoPlainText">No raid, /dev/sdc:<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">Number Start (sector) End (sector) Size Code Name<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 1 2048 1953124351 931.3 GiB 8300 Linux filesystem<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 2 1953124352 1972656127 9.3 GiB 8300 Linux filesystem<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> 3 1972656128 5860533134 1.8 TiB 8300 Linux filesystem<o:p></o:p></span></p>
<p class="MsoPlainText">• LVM configuration: no LVM<o:p></o:p></p>
<p class="MsoPlainText">• type of disks you are using: WD30EURS<o:p></o:p></p>
<p class="MsoPlainText">• write cache status of drives: <span style="color:red">write-caching = 1 (on)</span><o:p></o:p></p>
<p class="MsoPlainText">• size of BBWC and mode it is running in: No<o:p></o:p></p>
<p class="MsoPlainText">• xfs_info output on the filesystem in question:<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">meta-data=/dev/sdc2 isize=256 agcount=16, agsize=152592 blks<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> = sectsz=4096 attr=2<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">data = bsize=4096 blocks=2441472, imaxpct=25<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> = sunit=0 swidth=0 blks<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">naming =version 2 bsize=4096 ascii-ci=0<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">log =internal bsize=4096 blocks=2560, version=2<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red"> = sectsz=4096 sunit=1 blks, lazy-count=1<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">realtime =external extsz=1540096 blocks=485984625, rtextents=1292512<o:p></o:p></span></p>
<p class="MsoPlainText">• dmesg output showing all error messages and stack traces:<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:red">[166770.764560] XFS (sdc2): Mounting Filesystem<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">[166770.865189] XFS (sdc2): Starting recovery (logdev: internal)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">[166771.042071] XFS (sdc2): Ending recovery (logdev: internal)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">[166918.066626] XFS (sdc2): Mounting Filesystem<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:red">[166918.159045] XFS (sdc2): Ending clean mount<o:p></o:p></span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thank you.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Semion<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
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