"Thankyou Qu, but that just presents more problems by trying to go
back to an earlier Kernel.
> "For kernel, at one earlier than v4.18 should be OK."
I have tried with a 2017 Opensuse LiveBoot and kernel.
localhost:/home/linux # uname -r; btrfs --version
4.11.5-1-default
> "For "btrfs check --repair" you still need that special branch."
I upgraded brtrfsprogs to 4.19.1
And also added that branch to the 2017 Liveboot.v4.19
"An older kernel will allow balance and ignore the error."
I tried to mount to do the balance and it will not allow it to mount,
I'm guessing due to the flags.
localhost:/home/linux # mount -t btrfs /dev/sda7 /mnt/sda7
mount: wrong fs type, bad option, bad superblock on /dev/sda7,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
BTRFS info (device sda7): disk space caching is enabled
BTRFS error (device sda7): cannot mount because of unsupported
optional features (10)
BTRFS error (device sda7): open_ctree failed
localhost:/home/linux # mount -t btrfs -o ro,compress=lzo /dev/sda7 /mnt/sda7
mount: wrong fs type, bad option, bad superblock on /dev/sda7,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
BTRFS info (device sda7): disk space caching is enabled
BTRFS error (device sda7): cannot mount because of unsupported
optional features (10)
BTRFS error (device sda7): open_ctree failed
BTRFS info (device sda7): use lzo compression
#btrfs inspect-internal dump-super /dev/sda7
incompat_flags 0x17b
( MIXED_BACKREF |
DEFAULT_SUBVOL |
COMPRESS_LZO |
COMPRESS_ZSTD |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
> "No. Balance can't be done/canceled in btrfs-progs IIRC."
This sounds like a dangerous limitation.
>
> Are there really not any manual dev tools where a specific directory
> and its referenced inodes can be manually specified for foremoval?
> > "Yes, but will be even more complex than "btrfs check --repair"
Where are these available from and are there instructions?
Is there by chance any liveboot disk/usb designed for such repairs?
At the moment it seems
I cannot mount rw or ro in old kernel to do balance.
I cannot mount rw in new kernel to do balance due to some apparent
corruption in a kernel prior to 4.18
And yet the actual problem seems to be very small and on
inconsequential cache directory.
What can be done to fix what seems such a small problem that prevents
access to the entire volume and subvolumes?
Thankyou
Jesse
On Sun, Dec 30, 2018 at 12:34 PM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
>
>
>
> On 2018/12/30 上午10:57, Jesse Emeth wrote:
> > Hi Qu
> >
> > How old a kernel needs to be used to "work around this by using an
> > older kernel to finish the balance, and then repair.(due to relocroot
> > is a special corner case I didn't take into consideration)?
>
> For kernel, at one earlier than v4.18 should be OK.
>
> > What version of btrfs-progs/tools should be used in this case?
>
> For "btrfs check --repair" you still need that special branch.
>
> >
> > Also the problem as mentioned in this thread is that the volume cannot
> > be mounted rw. Are there versions of balance that can work on
> > unmounted devices?
>
> No. Balance can't be done/canceled in btrfs-progs IIRC.
>
> > Or is this now another catch 22 problem where balance is required to
> > enable rw mount but rw mount is required to balance?
>
> An older kernel will allow balance and ignore the error.
>
> >
> > Are there really not any manual dev tools where a specific directory
> > and its referenced inodes can be manually specified for foremoval?
>
> Yes, but will be even more complex than "btrfs check --repair"
>
> Thanks,
> Qu
>
> >
> > Thankyou
> > Jesse
> >
> >>
> >
> >
> >
> >
> >
> > On Sun, Dec 30, 2018 at 8:16 AM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
> >>
> >>
> >>
> >> On 2018/12/29 下午11:07, Jesse Emeth wrote:
> >>> Hi Qu
> >>>
> >>> It does not look very successful. For completeness btrfs shows version 4.19.1
> >>> btrfs in /usr/local/btrfs shows version 4.19, which is the one I used below
> >>>
> >>> # /usr/local/bin/btrfs check /dev/sda7 2>&1 | tee
> >>> /home/jesse/Data/btrfs-check-4.19alpha-sda7.txt
> >>> [1/7] checking root items
> >>> [2/7] checking extents
> >>> [3/7] checking free space cache
> >>> [4/7] checking fs roots
> >>> root 263 inode 455338 errors 40000
> >>> Dir items with mismatch hash:
> >>> root 263 inode 463979 errors 2000, link count wrong
> >>> unresolved ref dir 455338 index 5857 namelen 40 name
> >>> 648C5FC8D5C2CB828ED86E44DD9E5FB3A6430332 filetype 1 errors 1, no dir
> >>> item
> >>> relocroot 263 inode 455338 errors 40000
> >>> Dir items with mismatch hash:
> >>> relocroot 263 inode 463979 errors 2000, link count wrong
> >>> unresolved ref dir 455338 index 5857 namelen 40 name
> >>> 648C5FC8D5C2CB828ED86E44DD9E5FB3A6430332 filetype 1 errors 1, no dir
> >>> item
> >>> ERROR: errors found in fs roots
> >>> Opening filesystem to check...
> >>> Checking filesystem on /dev/sda7
> >>> UUID: 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5
> >>> found 32441643008 bytes used, error(s) found
> >>> total csum bytes: 28041192
> >>> total tree bytes: 826359808
> >>> total fs tree bytes: 739311616
> >>> total extent tree bytes: 48562176
> >>> btree space waste bytes: 171286636
> >>> file data blocks allocated: 41396502528
> >>> referenced 47784960000
> >>>
> >>>
> >>> # /usr/local/bin/btrfs check --repair /dev/sda7 2>&1 | tee
> >>> /home/jesse/Data/btrfs-check-4.19alpha-repair-sda7.txt
> >>> [1/7] checking root items
> >>> Fixed 0 roots.
> >>> [2/7] checking extents
> >>> [3/7] checking free space cache
> >>> [4/7] checking fs roots
> >>> root 263 inode 455338 errors 40000
> >>> Dir items with mismatch hash:
> >>> relocroot 263 inode 455338 errors 40000
> >>
> >> relocroot is a special corner case I didn't take into consideration.
> >>
> >> You could word around this by using an older kernel to finish the
> >> balance, and then repair.
> >>
> >> Thanks,
> >> Qu
> >>
> >>> Dir items with mismatch hash:
> >>> btrfs unable to find ref byte nr 37142528 parent 0 root
> >>> 18446744073709551608 owner 0 offset 0
> >>> transaction.c:168: btrfs_commit_transaction: BUG_ON `ret` triggered, value -5
> >>> /usr/local/bin/btrfs(btrfs_commit_transaction+0x1ab)[0x44086b]
> >>> /usr/local/bin/btrfs[0x457efc]
> >>> /usr/local/bin/btrfs[0x45ade4]
> >>> /usr/local/bin/btrfs(cmd_check+0x1ef8)[0x462a95]
> >>> /usr/local/bin/btrfs(main+0x8b)[0x40e022]
> >>> /lib64/libc.so.6(__libc_start_main+0xeb)[0x7f34dab41feb]
> >>> /usr/local/bin/btrfs(_start+0x2a)[0x40dd0a]
> >>>
> >>> Thanks
> >>>
> >>> On Sat, Dec 29, 2018 at 10:47 PM Jesse Emeth <jesse.emeth@xxxxxxxxx> wrote:
> >>>>
> >>>> Hi Qu
> >>>> Just replying for posterity for anyone else with same problem. The
> >>>> make now works I think. I will proceed with btrfs repair attempt.
> >>>> I was using the git version which seems to lack autogen.sh and thus in
> >>>> turn configure. The git clone version also contains a different
> >>>> INSTALL file.
> >>>>
> >>>> I have since tried the zip version which contains autogen.sh
> >>>>
> >>>> Additional installs required for Tumbleweed turned out to be:
> >>>> zypper in libuuid-devel libacl-devel libblkid-devel lzo-devel
> >>>> zlib-devel zstd libzstd-devel libext2fs-devel autoconf automake
> >>>> python3 python3-devel
> >>>>
> >>>> Then the following make worked:
> >>>> ./autogen.sh
> >>>> ./configure --disable-documentation --disable-convert
> >>>> make
> >>>>
> >>>> # make install
> >>>> /usr/bin/install -c -m755 -d /usr/local/bin
> >>>> /usr/bin/install -c btrfs mkfs.btrfs btrfs-map-logical btrfs-image
> >>>> btrfs-find-root btrfstune btrfs-select-super /usr/local/bin
> >>>> /usr/bin/install -c fsck.btrfs /usr/local/bin
> >>>> # btrfsck is a link to btrfs in the src tree, make it so for installed
> >>>> file as well
> >>>> ln -s -f btrfs /usr/local/bin/btrfsck
> >>>> /usr/bin/install -c -m755 -d /usr/lib/udev/rules.d
> >>>> /usr/bin/install -c -m644 64-btrfs-dm.rules /usr/lib/udev/rules.d
> >>>> /usr/bin/install -c -m755 -d /usr/local/lib
> >>>> /usr/bin/install -c libbtrfs.so.0.1 libbtrfsutil.so.1.0.0
> >>>> libbtrfs.so.0 libbtrfs.so libbtrfsutil.so.1 libbtrfsutil.so libbtrfs.a
> >>>> libbtrfsutil.a /usr/local/lib
> >>>> cp -d libbtrfs.so.0 libbtrfs.so libbtrfsutil.so.1 libbtrfsutil.so /usr/local/lib
> >>>> /usr/bin/install -c -m755 -d /usr/local/include/btrfs
> >>>> /usr/bin/install -c -m644 send-stream.h send-utils.h send.h
> >>>> kernel-lib/rbtree.h btrfs-list.h kernel-lib/crc32c.h kernel-lib/list.h
> >>>> kerncompat.h kernel-lib/radix-tree.h kernel-lib/sizes.h
> >>>> kernel-lib/raid56.h extent-cache.h extent_io.h ioctl.h ctree.h
> >>>> btrfsck.h version.h /usr/local/include/btrfs
> >>>> /usr/bin/install -c -m644 libbtrfsutil/btrfsutil.h /usr/local/include
> >>>>
> >>>> Thanks Qu, I will try the repair now.
> >>>>
> >>>> Jesse
> >>>>
> >>>> On Sat, Dec 29, 2018 at 10:02 PM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>> On 2018/12/29 下午9:56, Jesse Emeth wrote:
> >>>>>> Thanks again, but ./configure seems to be missing.
> >>>>>> Why is that?
> >>>>>
> >>>>> Oh, you missed all the configuration phrase.
> >>>>>
> >>>>> The proper way to compile btrfs-progs is: (also noted in INSTALL)
> >>>>>
> >>>>> $ ./autogen.sh
> >>>>> $ ./configure --disable-documentation --disable-convert
> >>>>> $ make
> >>>>>
> >>>>> Then
> >>>>>
> >>>>> $ sudo ./btrfs check --repair <your_device>
> >>>>>
> >>>>> Thanks,
> >>>>> Qu
> >>>>>
> >>>>>>
> >>>>>> On Sat, Dec 29, 2018 at 9:15 PM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> On 2018/12/29 下午9:05, Jesse Emeth wrote:
> >>>>>>>> Thanks again Qu
> >>>>>>>> However, it is still problematic.
> >>>>>>>> Have installed
> >>>>>>>> #zypper in libuuid-devel libacl-devel libblkid-devel lzo-devel
> >>>>>>>> zlib-devel zstd libzstd-devel libext2fs-devel
> >>>>>>>>
> >>>>>>>> There are still errors for executable builds of: kerncompat.h:300:
> >>>>>>>> warning: "__bitwise" redefined
> >>>>>>>> up to btrfs-zero-log
> >>>>>>>
> >>>>>>> That's just warning and should be fixed in later btrfs-progs.
> >>>>>>> No need to be too anxious about such warning.
> >>>>>>>
> >>>>>>>>
> >>>>>>>> Then there are problems with btrfs-convert as below:
> >>>>>>>> CC] btrfs-convert.o
> >>>>>>>> In file included from btrfs-convert.c:22:
> >>>>>>>> kerncompat.h:300: warning: "__bitwise" redefined
> >>>>>>>> #define __bitwise
> >>>>>>>>
> >>>>>>>> In file included from kerncompat.h:30,
> >>>>>>>> from btrfs-convert.c:22:
> >>>>>>>> /usr/include/linux/types.h:22: note: this is the location of the
> >>>>>>>> previous definition
> >>>>>>>> #define __bitwise __bitwise__
> >>>>>>>>
> >>>>>>>> btrfs-convert.c: In function ‘ext2_xattr_check_entry’:
> >>>>>>>> btrfs-convert.c:626:13: error: ‘struct ext2_ext_attr_entry’ has no
> >>>>>>>> member named ‘e_value_block’; did you mean ‘e_value_offs’?
> >>>>>>>> if (entry->e_value_block != 0 || value_size > size ||
> >>>>>>>> ^~~~~~~~~~~~~
> >>>>>>>> e_value_offs
> >>>>>>>> make: *** [Makefile:131: btrfs-convert.o] Error 1
> >>>>>>>
> >>>>>>> That's due to some change in e2fsprogs.
> >>>>>>>
> >>>>>>> This can be fixed by disable convert by using "./configure
> >>>>>>> --disable-convert", and recompile.
> >>>>>>>
> >>>>>>> Thanks,
> >>>>>>> Qu
> >>>>>>>
> >>>>>>>>
> >>>>>>>> On Sat, Dec 29, 2018 at 8:25 PM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> On 2018/12/29 下午8:11, Jesse Emeth wrote:
> >>>>>>>>>> Hi Qu
> >>>>>>>>>>
> >>>>>>>>>> Thankyou for that reference.
> >>>>>>>>>> As per the logs I provided above, this was the kernel
> >>>>>>>>>> localhost:/ # uname -a
> >>>>>>>>>> Linux localhost.localdomain 4.18.13-1-default #1 SMP PREEMPT Wed Oct
> >>>>>>>>>> 10 18:47:28 UTC 2018 (c434d5c) x86_64 x86_64 x86_64 GNU/Linux
> >>>>>>>>>>
> >>>>>>>>>> Is the kernel version relevant to
> >>>>>>>>>> 1) The kernel at the time of btrfs repair being run?
> >>>>>>>>>
> >>>>>>>>> No.
> >>>>>>>>> Repair is completely independent from kernel version, so kernel doesn't
> >>>>>>>>> have anything to do with it.
> >>>>>>>>>
> >>>>>>>>>> 2) The kernel at the time of fault originally occurring?
> >>>>>>>>>
> >>>>>>>>> I don't think the fault is caused by that v4.18 kernel, but a much older
> >>>>>>>>> kernel.
> >>>>>>>>> It's v4.18+ kernel that introduces such sanity check and exposed such
> >>>>>>>>> old corruption.
> >>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>> I am now running OpenSuse Tumbleweed to repair this:
> >>>>>>>>>> # uname -a
> >>>>>>>>>> Linux linux-h5nt 4.19.8-1-default #1 SMP PREEMPT Sun Dec 9 20:08:37
> >>>>>>>>>> UTC 2018 (9cae63f) x86_64 x86_64 x86_64 GNU/Linux
> >>>>>>>>>>
> >>>>>>>>>> I have run the https://github.com/adam900710/btrfs-progs/tree/check-next
> >>>>>>>>>> with latest commit of 13th Nov 2018.
> >>>>>>>>>> When I run make, it fails.
> >>>>>>>>>> Could you please advise if I am missing something?
> >>>>>>>>>>
> >>>>>>>>>> Below are the make errors. Thankyou
> >>>>>>>>>>
> >>>>>>>>> [snip]
> >>>>>>>>>> [CC] print-tree.o
> >>>>>>>>>> print-tree.c:21:10: fatal error: uuid/uuid.h: No such file or directory
> >>>>>>>>>> #include <uuid/uuid.h>
> >>>>>>>>>> ^~~~~~~~~~~~~
> >>>>>>>>>> compilation terminated.
> >>>>>>>>>> make: *** [Makefile:131: print-tree.o] Error 1
> >>>>>>>>>
> >>>>>>>>> You just lacks a lot of development headers.
> >>>>>>>>>
> >>>>>>>>> You may need but not limited development headers of:
> >>>>>>>>>
> >>>>>>>>> libuuid, libacl, libblkid, lzo, zlib, zstd, e2fsprogs.
> >>>>>>>>> (Name may var for different distros, either with lib prefix or without)
> >>>>>>>>>
> >>>>>>>>> And you may need to disable documentation by using "./configure
> >>>>>>>>> --disable-documentation"
> >>>>>>>>>
> >>>>>>>>> Thanks,
> >>>>>>>>> Qu
> >>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>> On Sun, Dec 23, 2018 at 8:51 AM Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote:
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> On 2018/12/23 上午2:12, Jesse Emeth wrote:
> >>>>>>>>>>>> BTRFS /@/ with home as subvolume results in Firefox cache entries
> >>>>>>>>>>>> corrupt leaf that in turn prevents rw mounting.
> >>>>>>>>>>>> BTRFS Standard Repair Tools are unsuccessful to fix what seems a small
> >>>>>>>>>>>> localised error to a non critical directory.
> >>>>>>>>>>>> I could not find any BTRFS type tool to remove just that directory
> >>>>>>>>>>>> without the volume mounted rw.
> >>>>>>>>>>>> And there is the catch 22 of not being able to mount it ro while the
> >>>>>>>>>>>> "corrupt leaf" error occurs.
> >>>>>>>>>>>> Initially btrfs rescue zero-log gave rw access.
> >>>>>>>>>>>> I could not delete the "entries" directory associated with the Firefox
> >>>>>>>>>>>> cache "entries" directory.
> >>>>>>>>>>>> I was permitted to rename it so I renamed "entries" as "broken-inode-455338"
> >>>>>>>>>>>> The system shortly thereafter set itself again to ro. Since then rw
> >>>>>>>>>>>> mount is not possible.
> >>>>>>>>>>>>
> >>>>>>>>>>>> The steps at https://lists.opensuse.org/opensuse/2017-02/msg00930.html
> >>>>>>>>>>>> were attempted to repair the system.
> >>>>>>>>>>>> There Richard Brown said "can we please bury the nonsense that btrfs
> >>>>>>>>>>>> is lacking when it comes to repair and recovery tools"
> >>>>>>>>>>>> I say hell no!
> >>>>>>>>>>>> As a user there seems to be a lack of granular ability to remove
> >>>>>>>>>>>> corrupt entries.
> >>>>>>>>>>>> There also seems to be no way of denying a subvolume (eg: in this case
> >>>>>>>>>>>> "home") from consideration when mounting the main volume.
> >>>>>>>>>>>> Or to remove a subvolume from the main volume.
> >>>>>>>>>>>> If there was, I could remove the "home" subvolume and recreate just that.
> >>>>>>>>>>>> So in this example it seems a very small and trivial error of a cache
> >>>>>>>>>>>> dir trashes the entire btrfs subvolume.
> >>>>>>>>>>>>
> >>>>>>>>>>>> What suggestions exist to prevent such problems occuring again other
> >>>>>>>>>>>> than separating out all subvolumes onto separate partitions or LVM's?
> >>>>>>>>>>>> And are there any tools available to manually repair a problem like I
> >>>>>>>>>>>> am experiencing with "entries" dir.
> >>>>>>>>>>>>
> >>>>>>>>>>>> Thankyou
> >>>>>>>>>>>>
> >>>>>>>>>>>> Relevant logs and settings are below as sent to bugzilla
> >>>>>>>>>>>> (https://bugzilla.kernel.org/show_bug.cgi?id=202041)
> >>>>>>>>>>>>
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> # Note: block 537133056 inode 455338 is the entries dir of the cache
> >>>>>>>>>>>> directories for firefox
> >>>>>>>>>>>> /home/USER/.cache/mozilla/firefox/PROFILENAME/cache2/entries
> >>>>>>>>>>>> # I was unable to delete the broken dir, but managed to rename
> >>>>>>>>>>>> ./entries to ./broken-inode-455338 and to create a new empty ./entries
> >>>>>>>>>>>> dir
> >>>>>>>>>>>> # Then was able to initiate scrub etc
> >>>>>>>>>>>> # But it later failed again that day. There was no way I could
> >>>>>>>>>>>> ascertain to remove the broken inode.
> >>>>>>>>>>>> # Mounted ro, the ./broken-inode-455338 dir can be opened but appears empty
> >>>>>>>>>>>> # It becomes problematic seemingly only when volume is mounted rw
> >>>>>>>>>>>>
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # mount -t btrfs -o ro
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /mnt/sda7
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # uname -a
> >>>>>>>>>>>> Linux localhost.localdomain 4.18.13-1-default #1 SMP PREEMPT Wed Oct
> >>>>>>>>>>>> 10 18:47:28 UTC 2018 (c434d5c) x86_64 x86_64 x86_64 GNU/Linux
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # btrfs --version
> >>>>>>>>>>>> btrfs-progs v4.17.1
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # btrfs fi show
> >>>>>>>>>>>> Label: 'pt_osa1' uuid: 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5
> >>>>>>>>>>>> Total devices 2 FS bytes used 30.23GiB
> >>>>>>>>>>>> devid 1 size 97.66GiB used 39.03GiB path /dev/sda7
> >>>>>>>>>>>> devid 2 size 97.66GiB used 39.03GiB path /dev/sdb7
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # btrfs fi df /mnt/sda7
> >>>>>>>>>>>> Data, RAID1: total=37.00GiB, used=29.46GiB
> >>>>>>>>>>>> System, RAID1: total=32.00MiB, used=16.00KiB
> >>>>>>>>>>>> Metadata, RAID1: total=2.00GiB, used=787.94MiB
> >>>>>>>>>>>> GlobalReserve, single: total=82.91MiB, used=0.00B
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # mount -t btrfs -o ro
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /mnt/sda7
> >>>>>>>>>>>> [Thu Dec 20 02:29:52 2018] BTRFS info (device sda7): disk space
> >>>>>>>>>>>> caching is enabled
> >>>>>>>>>>>> [Thu Dec 20 02:29:52 2018] BTRFS info (device sda7): has skinny extents
> >>>>>>>>>>>> [Thu Dec 20 02:35:12 2018] BTRFS info (device sda7): disk space
> >>>>>>>>>>>> caching is enabled
> >>>>>>>>>>>> [Thu Dec 20 02:35:12 2018] BTRFS info (device sda7): has skinny extents
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> # Note: Mounting ro as above works without any error. Attempts to
> >>>>>>>>>>>> mount rw fails...
> >>>>>>>>>>>> localhost:/ # mount -t btrfs -o rw
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /mnt/sda7
> >>>>>>>>>>>> mount: /mnt/sda7: wrong fs type, bad option, bad superblock on
> >>>>>>>>>>>> /dev/sda7, missing codepage or helper program, or other error.
> >>>>>>>>>>>> [Thu Dec 20 02:36:06 2018] BTRFS info (device sda7): disk space
> >>>>>>>>>>>> caching is enabled
> >>>>>>>>>>>> [Thu Dec 20 02:36:06 2018] BTRFS info (device sda7): has skinny extents
> >>>>>>>>>>>> [Thu Dec 20 02:36:25 2018] BTRFS critical (device sda7): corrupt leaf:
> >>>>>>>>>>>> root=263 block=537133056 slot=98 ino=455338, name hash mismatch with
> >>>>>>>>>>>> key, have 0x000000007dd7ffcb expect 0x00000000dfc274ff
> >>>>>>>>>>>
> >>>>>>>>>>> Known bug for older kernel.
> >>>>>>>>>>>
> >>>>>>>>>>> If btrfs check reports no other error, you could use this branch to fix it:
> >>>>>>>>>>>
> >>>>>>>>>>> https://github.com/adam900710/btrfs-progs/tree/check-next
> >>>>>>>>>>>
> >>>>>>>>>>> Thanks,
> >>>>>>>>>>> Qu
> >>>>>>>>>>>
> >>>>>>>>>>>> [Thu Dec 20 02:36:25 2018] BTRFS: error (device sda7) in
> >>>>>>>>>>>> merge_reloc_roots:2466: errno=-5 IO failure
> >>>>>>>>>>>> [Thu Dec 20 02:36:25 2018] BTRFS warning (device sda7): failed to
> >>>>>>>>>>>> recover relocation: -30
> >>>>>>>>>>>> [Thu Dec 20 02:36:25 2018] BTRFS error (device sda7): cleaner
> >>>>>>>>>>>> transaction attach returned -30
> >>>>>>>>>>>> [Thu Dec 20 02:36:25 2018] BTRFS error (device sda7): open_ctree failed
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> # Immediately after failing rw mount, attempts to mount ro results in
> >>>>>>>>>>>> no errors recorded...
> >>>>>>>>>>>> mount -t btrfs -o subvol=@/home,ro
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /mnt/sda7/home
> >>>>>>>>>>>> [Thu Dec 20 02:46:36 2018] BTRFS info (device sda7): disk space
> >>>>>>>>>>>> caching is enabled
> >>>>>>>>>>>> [Thu Dec 20 02:46:36 2018] BTRFS info (device sda7): has skinny extents
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> # Note: block 537133056 inode 455338 is the entries dir of the cache
> >>>>>>>>>>>> directories for firefox
> >>>>>>>>>>>> /home/USER/.cache/mozilla/firefox/PROFILENAME/cache2/entries
> >>>>>>>>>>>> btrfs inspect-internal dump-tree -b 537133056 /dev/sda7
> >>>>>>>>>>>> btrfs-progs v4.17.1
> >>>>>>>>>>>> leaf 537133056 items 107 free space 6118 generation 40120 owner 263
> >>>>>>>>>>>> leaf 537133056 flags 0x1(WRITTEN) backref revision 1
> >>>>>>>>>>>> fs uuid 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5
> >>>>>>>>>>>> chunk uuid 4cab7492-6459-4bda-8703-dcc6a81e622b
> >>>>>>>>>>>> item 0 key (455338 DIR_ITEM 3540219901) itemoff 16213 itemsize 70
> >>>>>>>>>>>> location key (703987 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 38014 data_len 0 name_len 40
> >>>>>>>>>>>> name: 26F2BD5CBF294474EFDC521833782B585603C132
> >>>>>>>>>>>> item 1 key (455338 DIR_ITEM 3543270328) itemoff 16143 itemsize 70
> >>>>>>>>>>>> location key (672675 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 36034 data_len 0 name_len 40
> >>>>>>>>>>>> name: 916D2EF147007C80F33481F0A09AD58A888F8298
> >>>>>>>>>>>> item 2 key (455338 DIR_ITEM 3544258744) itemoff 16073 itemsize 70
> >>>>>>>>>>>> location key (740437 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39752 data_len 0 name_len 40
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> >>>>>>>>>>>> item 81 key (455338 DIR_ITEM 3701461322) itemoff 10543 itemsize 70
> >>>>>>>>>>>> location key (743657 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39904 data_len 0 name_len 40
> >>>>>>>>>>>> name: 1EDE36E65181CD92DEC34281EEF08FCEC0541745
> >>>>>>>>>>>> item 82 key (455338 DIR_ITEM 3702531124) itemoff 10473 itemsize 70
> >>>>>>>>>>>> location key (714153 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 38907 data_len 0 name_len 40
> >>>>>>>>>>>> name: 7EF6235586E1FEE458EF2C3560F690ACF00D64A3
> >>>>>>>>>>>> item 83 key (455338 DIR_ITEM 3709878314) itemoff 10403 itemsize 70
> >>>>>>>>>>>> location key (748270 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 40120 data_len 0 name_len 40
> >>>>>>>>>>>> name: 5CCACDD44241E3EBEEA33570219B0F19F91D10CC
> >>>>>>>>>>>> item 84 key (455338 DIR_ITEM 3711939545) itemoff 10333 itemsize 70
> >>>>>>>>>>>> location key (718030 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 38973 data_len 0 name_len 40
> >>>>>>>>>>>> name: 55BFCF28726B22E68AAF2C393B4CF5D2DF8397E2
> >>>>>>>>>>>> item 85 key (455338 DIR_ITEM 3714383304) itemoff 10263 itemsize 70
> >>>>>>>>>>>> location key (708140 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 38357 data_len 0 name_len 40
> >>>>>>>>>>>> name: 50CD01B20F1AFEDC318FEB46A467557A2878B9CC
> >>>>>>>>>>>> item 86 key (455338 DIR_ITEM 3717994042) itemoff 10193 itemsize 70
> >>>>>>>>>>>> location key (722031 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39119 data_len 0 name_len 40
> >>>>>>>>>>>> name: C6C8588E91B54622066E8462DA69681505C0EF32
> >>>>>>>>>>>> item 87 key (455338 DIR_ITEM 3720066625) itemoff 10123 itemsize 70
> >>>>>>>>>>>> location key (721870 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39119 data_len 0 name_len 40
> >>>>>>>>>>>> name: 7ED965594B3BF9BA68AAB6EAE62490E28B9A7277
> >>>>>>>>>>>> item 88 key (455338 DIR_ITEM 3720757208) itemoff 10053 itemsize 70
> >>>>>>>>>>>> location key (740718 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39757 data_len 0 name_len 40
> >>>>>>>>>>>> name: 067B3AA0A501EC22CC7E87D4AEFDD5F6C140C938
> >>>>>>>>>>>> item 89 key (455338 DIR_ITEM 3721224365) itemoff 9983 itemsize 70
> >>>>>>>>>>>> location key (736920 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39651 data_len 0 name_len 40
> >>>>>>>>>>>> name: EC355701D5BAF931F6D0D3F1F4B64891227BFBDE
> >>>>>>>>>>>> item 90 key (455338 DIR_ITEM 3728042486) itemoff 9913 itemsize 70
> >>>>>>>>>>>> location key (691232 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 37527 data_len 0 name_len 40
> >>>>>>>>>>>> name: 2430E27DEC60EEDD6B26F9BBD890B03097AE141D
> >>>>>>>>>>>> item 91 key (455338 DIR_ITEM 3728903590) itemoff 9843 itemsize 70
> >>>>>>>>>>>> location key (747885 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 40082 data_len 0 name_len 40
> >>>>>>>>>>>> name: 898EA51F7C37A05B570675AD499423BF2D1BC6D0
> >>>>>>>>>>>> item 92 key (455338 DIR_ITEM 3734264028) itemoff 9773 itemsize 70
> >>>>>>>>>>>> location key (722185 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39120 data_len 0 name_len 40
> >>>>>>>>>>>> name: 24469A256D4FE3814D33B6975D49E3A28EF16EC9
> >>>>>>>>>>>> item 93 key (455338 DIR_ITEM 3738964685) itemoff 9703 itemsize 70
> >>>>>>>>>>>> location key (685067 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 36975 data_len 0 name_len 40
> >>>>>>>>>>>> name: 044D06846635A0CF7C9E32ABD4AFE5EEDAFDB5CD
> >>>>>>>>>>>> item 94 key (455338 DIR_ITEM 3748117366) itemoff 9633 itemsize 70
> >>>>>>>>>>>> location key (692538 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 37622 data_len 0 name_len 40
> >>>>>>>>>>>> name: 860CBC7964C9F41AAB9A0BFDAA57DBCB01163779
> >>>>>>>>>>>> item 95 key (455338 DIR_ITEM 3749145932) itemoff 9563 itemsize 70
> >>>>>>>>>>>> location key (728144 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39404 data_len 0 name_len 40
> >>>>>>>>>>>> name: 5E3F61D6678EDD6BBDBD9F16E5871D825357F695
> >>>>>>>>>>>> item 96 key (455338 DIR_ITEM 3750982353) itemoff 9493 itemsize 70
> >>>>>>>>>>>> location key (721315 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39117 data_len 0 name_len 40
> >>>>>>>>>>>> name: FCE0F0D3C3A3D1DF147BCC410EC03235BECF877E
> >>>>>>>>>>>> item 97 key (455338 DIR_ITEM 3751215179) itemoff 9423 itemsize 70
> >>>>>>>>>>>> location key (675576 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 36353 data_len 0 name_len 40
> >>>>>>>>>>>> name: 79606EABD028C5A6DFC0AA2F60B06EB61FFF5CDA
> >>>>>>>>>>>> item 98 key (455338 DIR_ITEM 3754063103) itemoff 9353 itemsize 70
> >>>>>>>>>>>> location key (463979 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 25552 data_len 0 name_len 40
> >>>>>>>>>>>> name: 648C5FC8D5C2BB828ED86E44DD9E5FB3A6430332
> >>>>>>>>>>>> item 99 key (455338 DIR_ITEM 3759476008) itemoff 9283 itemsize 70
> >>>>>>>>>>>> location key (695411 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 37702 data_len 0 name_len 40
> >>>>>>>>>>>> name: EA0D80B3AC2EB5A79D44A9E36279688B4F4F4571
> >>>>>>>>>>>> item 100 key (455338 DIR_ITEM 3760671333) itemoff 9213 itemsize 70
> >>>>>>>>>>>> location key (742035 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39862 data_len 0 name_len 40
> >>>>>>>>>>>> name: 3ACDD6CB0A6CB9AA9C9D9F6EA2AA3339963B7A9C
> >>>>>>>>>>>> item 101 key (455338 DIR_ITEM 3769483178) itemoff 9143 itemsize 70
> >>>>>>>>>>>> location key (570869 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 30187 data_len 0 name_len 40
> >>>>>>>>>>>> name: 85A9CF3B7F369C806A0D8768216748C516DD0844
> >>>>>>>>>>>> item 102 key (455338 DIR_ITEM 3770386312) itemoff 9073 itemsize 70
> >>>>>>>>>>>> location key (463983 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 25552 data_len 0 name_len 40
> >>>>>>>>>>>> name: 088AFB851C028D9E256D0B7C68348F277FC77557
> >>>>>>>>>>>> item 103 key (455338 DIR_ITEM 3770577855) itemoff 9003 itemsize 70
> >>>>>>>>>>>> location key (746148 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39955 data_len 0 name_len 40
> >>>>>>>>>>>> name: 02D103922E00747EE0CA600BAB1DBB820E19945F
> >>>>>>>>>>>> item 104 key (455338 DIR_ITEM 3774765965) itemoff 8933 itemsize 70
> >>>>>>>>>>>> location key (728088 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 39396 data_len 0 name_len 40
> >>>>>>>>>>>> name: 9DCEAF9793EA0EF13D1967FDD3CDCA1DE361106F
> >>>>>>>>>>>> item 105 key (455338 DIR_ITEM 3776729019) itemoff 8863 itemsize 70
> >>>>>>>>>>>> location key (699983 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 37906 data_len 0 name_len 40
> >>>>>>>>>>>> name: A48EC9DA3C204DF9C124C10C231D1D478BFB6BFA
> >>>>>>>>>>>> item 106 key (455338 DIR_ITEM 3781356904) itemoff 8793 itemsize 70
> >>>>>>>>>>>> location key (610716 INODE_ITEM 0) type FILE
> >>>>>>>>>>>> transid 32073 data_len 0 name_len 40
> >>>>>>>>>>>> name: 8B37E9EF2812C5B70E7B0FF7EBCB317B4323BD8A
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # btrfs inspect-internal dump-super /dev/sda7
> >>>>>>>>>>>> superblock: bytenr=65536, device=/dev/sda7
> >>>>>>>>>>>> ---------------------------------------------------------
> >>>>>>>>>>>> csum_type 0 (crc32c)
> >>>>>>>>>>>> csum_size 4
> >>>>>>>>>>>> csum 0x9c238f67 [match]
> >>>>>>>>>>>> bytenr 65536
> >>>>>>>>>>>> flags 0x1
> >>>>>>>>>>>> ( WRITTEN )
> >>>>>>>>>>>> magic _BHRfS_M [match]
> >>>>>>>>>>>> fsid 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5
> >>>>>>>>>>>> label pt_osa1
> >>>>>>>>>>>> generation 429428
> >>>>>>>>>>>> root 31473664
> >>>>>>>>>>>> sys_array_size 129
> >>>>>>>>>>>> chunk_root_generation 429386
> >>>>>>>>>>>> root_level 1
> >>>>>>>>>>>> chunk_root 154484604928
> >>>>>>>>>>>> chunk_root_level 0
> >>>>>>>>>>>> log_root 0
> >>>>>>>>>>>> log_root_transid 0
> >>>>>>>>>>>> log_root_level 0
> >>>>>>>>>>>> total_bytes 209715200000
> >>>>>>>>>>>> bytes_used 32460804096
> >>>>>>>>>>>> sectorsize 4096
> >>>>>>>>>>>> nodesize 16384
> >>>>>>>>>>>> leafsize (deprecated) 16384
> >>>>>>>>>>>> stripesize 4096
> >>>>>>>>>>>> root_dir 6
> >>>>>>>>>>>> num_devices 2
> >>>>>>>>>>>> compat_flags 0x0
> >>>>>>>>>>>> compat_ro_flags 0x0
> >>>>>>>>>>>> incompat_flags 0x17b
> >>>>>>>>>>>> ( MIXED_BACKREF |
> >>>>>>>>>>>> DEFAULT_SUBVOL |
> >>>>>>>>>>>> COMPRESS_LZO |
> >>>>>>>>>>>> COMPRESS_ZSTD |
> >>>>>>>>>>>> BIG_METADATA |
> >>>>>>>>>>>> EXTENDED_IREF |
> >>>>>>>>>>>> SKINNY_METADATA )
> >>>>>>>>>>>> cache_generation 429428
> >>>>>>>>>>>> uuid_tree_generation 363
> >>>>>>>>>>>> dev_item.uuid f8bfb24e-353d-43fa-8d37-c2f61d966f32
> >>>>>>>>>>>> dev_item.fsid 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 [match]
> >>>>>>>>>>>> dev_item.type 0
> >>>>>>>>>>>> dev_item.total_bytes 104857600000
> >>>>>>>>>>>> dev_item.bytes_used 41909485568
> >>>>>>>>>>>> dev_item.io_align 0
> >>>>>>>>>>>> dev_item.io_width 0
> >>>>>>>>>>>> dev_item.sector_size 0
> >>>>>>>>>>>> dev_item.devid 1
> >>>>>>>>>>>> dev_item.dev_group 0
> >>>>>>>>>>>> dev_item.seek_speed 0
> >>>>>>>>>>>> dev_item.bandwidth 0
> >>>>>>>>>>>> dev_item.generation 0
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # mount | grep '/mnt/sda7'; blkid | grep
> >>>>>>>>>>>> '133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5'; btrfs inspect-internal
> >>>>>>>>>>>> inode-resolve 455338 /mnt/sda7
> >>>>>>>>>>>> /dev/sda7 on /mnt/sda7 type btrfs
> >>>>>>>>>>>> (ro,relatime,space_cache,subvolid=260,subvol=/@/.snapshots/1/snapshot)
> >>>>>>>>>>>> /dev/sda7: LABEL="pt_osa1" UUID="133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5"
> >>>>>>>>>>>> UUID_SUB="f8bfb24e-353d-43fa-8d37-c2f61d966f32" TYPE="btrfs"
> >>>>>>>>>>>> PTTYPE="dos" PARTLABEL="pt_osa1"
> >>>>>>>>>>>> PARTUUID="738e830b-3c58-4ce2-97f4-8e7503b92dce"
> >>>>>>>>>>>> /dev/sdb7: LABEL="pt_osa1" UUID="133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5"
> >>>>>>>>>>>> UUID_SUB="a11e8a7a-5fd2-4f9b-a9cc-b051b211bcbb" TYPE="btrfs"
> >>>>>>>>>>>> PTTYPE="dos" PARTLABEL="pt_osb1"
> >>>>>>>>>>>> PARTUUID="738e830b-3c58-4ce2-97f4-8e7503b92dce"
> >>>>>>>>>>>> ERROR: ino paths ioctl: No such file or directory
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> localhost:/ # btrfs su li /mnt/sda7
> >>>>>>>>>>>> ID 258 gen 253 top level 5 path @
> >>>>>>>>>>>> ID 259 gen 428546 top level 258 path @/.snapshots
> >>>>>>>>>>>> ID 260 gen 428625 top level 259 path @/.snapshots/1/snapshot
> >>>>>>>>>>>> ID 263 gen 429383 top level 258 path @/home
> >>>>>>>>>>>> ID 264 gen 429288 top level 258 path @/opt
> >>>>>>>>>>>> ID 265 gen 11660 top level 258 path @/srv
> >>>>>>>>>>>> ID 266 gen 429332 top level 258 path @/tmp
> >>>>>>>>>>>> ID 267 gen 429177 top level 258 path @/usr/local
> >>>>>>>>>>>> ID 268 gen 429365 top level 258 path @/var
> >>>>>>>>>>>> ID 269 gen 427718 top level 258 path @/root
> >>>>>>>>>>>> ID 307 gen 24177 top level 259 path @/.snapshots/6/snapshot
> >>>>>>>>>>>> ID 308 gen 24177 top level 259 path @/.snapshots/7/snapshot
> >>>>>>>>>>>> ID 309 gen 24177 top level 259 path @/.snapshots/8/snapshot
> >>>>>>>>>>>> ID 311 gen 24177 top level 259 path @/.snapshots/9/snapshot
> >>>>>>>>>>>> ID 320 gen 24220 top level 259 path @/.snapshots/16/snapshot
> >>>>>>>>>>>> ID 321 gen 24220 top level 259 path @/.snapshots/17/snapshot
> >>>>>>>>>>>> ID 330 gen 27036 top level 259 path @/.snapshots/24/snapshot
> >>>>>>>>>>>> ID 331 gen 27077 top level 259 path @/.snapshots/25/snapshot
> >>>>>>>>>>>> ID 353 gen 73635 top level 259 path @/.snapshots/46/snapshot
> >>>>>>>>>>>> ID 354 gen 73635 top level 259 path @/.snapshots/47/snapshot
> >>>>>>>>>>>> ID 355 gen 73635 top level 259 path @/.snapshots/48/snapshot
> >>>>>>>>>>>> ID 356 gen 73635 top level 259 path @/.snapshots/49/snapshot
> >>>>>>>>>>>> ID 358 gen 176335 top level 259 path @/.snapshots/50/snapshot
> >>>>>>>>>>>> ID 359 gen 176335 top level 259 path @/.snapshots/51/snapshot
> >>>>>>>>>>>> ID 361 gen 176335 top level 259 path @/.snapshots/52/snapshot
> >>>>>>>>>>>> ID 362 gen 176335 top level 259 path @/.snapshots/53/snapshot
> >>>>>>>>>>>> ID 363 gen 176335 top level 259 path @/.snapshots/54/snapshot
> >>>>>>>>>>>> ID 364 gen 176335 top level 259 path @/.snapshots/55/snapshot
> >>>>>>>>>>>> ---------------------------------
> >>>>>>>>>>>> #cat /etc/fstab
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 / btrfs compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /.snapshots btrfs
> >>>>>>>>>>>> subvol=@/.snapshots,compress=lzo 0 0
> >>>>>>>>>>>> #UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /boot btrfs
> >>>>>>>>>>>> subvol=@/boot,rw,noatime 0 0
> >>>>>>>>>>>> #UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /boot/grub2/i386-pc btrfs
> >>>>>>>>>>>> subvol=@/boot/grub2/i386-pc,rw,noatime 0 0
> >>>>>>>>>>>> #UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /boot/grub2/x86_64-efi
> >>>>>>>>>>>> btrfs subvol=@/boot/grub2/x86_64-efi,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /home btrfs
> >>>>>>>>>>>> subvol=@/home,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /opt btrfs
> >>>>>>>>>>>> subvol=@/opt,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /root btrfs
> >>>>>>>>>>>> subvol=@/root,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /srv btrfs
> >>>>>>>>>>>> subvol=@/srv,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /tmp btrfs
> >>>>>>>>>>>> subvol=@/tmp,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /usr/local btrfs
> >>>>>>>>>>>> subvol=@/usr/local,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /var btrfs
> >>>>>>>>>>>> subvol=@/var,compress=lzo,rw,noatime 0 0
> >>>>>>>>>>>> UUID=9471d962-1890-4624-9d89-2356bd5f0269 swap swap defaults 0 0
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> #btrfs check --readonly /dev/sda7 2>&1 | tee
> >>>>>>>>>>>> /mnt/archive01/--RepairBTRFS/btrfs-check-sda7-20181221.txt
> >>>>>>>>>>>> [1/7] checking root items
> >>>>>>>>>>>> [2/7] checking extents
> >>>>>>>>>>>> [3/7] checking free space cache
> >>>>>>>>>>>> [4/7] checking fs roots
> >>>>>>>>>>>> ERROR: DIR_ITEM[455338 3754063103] name
> >>>>>>>>>>>> 648C5FC8D5C2BB828ED86E44DD9E5FB3A643033276b6353640.first-shutdown.jsonlz4D19A0BCFCB.20181103140737858.wpsnda%202%20Questions%20Answered%20Lavaughn%20being%20a%20Nazi%20SS_20181029_1033.html0actor_20180213_20181028.html-25-17-.png=907-24%2011-57-47%7D.html
> >>>>>>>>>>>> namelen 40 filetype 1 mismatch with its hash, wanted 3754063103 have
> >>>>>>>>>>>> 2111307723
> >>>>>>>>>>>> root 263 inode 455338 errors 10, odd dir item
> >>>>>>>>>>>> unresolved ref dir 455338 index 0 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2BB828ED86E44DD9E5FB3A6430332 filetype 1 errors 6, no dir
> >>>>>>>>>>>> index, no inode ref
> >>>>>>>>>>>> unresolved ref dir 455338 index 5857 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2CB828ED86E44DD9E5FB3A6430332 filetype 1 errors 1, no dir
> >>>>>>>>>>>> item
> >>>>>>>>>>>> relocroot 263 inode 455338 errors 10, odd dir item
> >>>>>>>>>>>> unresolved ref dir 455338 index 0 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2BB828ED86E44DD9E5FB3A6430332 filetype 1 errors 6, no dir
> >>>>>>>>>>>> index, no inode ref
> >>>>>>>>>>>> unresolved ref dir 455338 index 5857 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2CB828ED86E44DD9E5FB3A6430332 filetype 1 errors 1, no dir
> >>>>>>>>>>>> item
> >>>>>>>>>>>> ERROR: errors found in fs roots
> >>>>>>>>>>>> Opening filesystem to check...
> >>>>>>>>>>>> Checking filesystem on /dev/sda7
> >>>>>>>>>>>> UUID: 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5
> >>>>>>>>>>>> found 32460804096 bytes used, error(s) found
> >>>>>>>>>>>> total csum bytes: 28059520
> >>>>>>>>>>>> total tree bytes: 826228736
> >>>>>>>>>>>> total fs tree bytes: 739164160
> >>>>>>>>>>>> total extent tree bytes: 48562176
> >>>>>>>>>>>> btree space waste bytes: 171226092
> >>>>>>>>>>>> file data blocks allocated: 41388740608
> >>>>>>>>>>>> referenced 47772729344
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> localhost:/home/linux # mount -t btrfs -o
> >>>>>>>>>>>> subvol=@/home,rw,usebackuproot
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /mnt/sda7-home
> >>>>>>>>>>>> mount: /mnt/sda7-home: wrong fs type, bad option, bad superblock on
> >>>>>>>>>>>> /dev/sdb7, missing codepage or helper program, or other error.
> >>>>>>>>>>>> [Sat Dec 22 12:20:36 2018] BTRFS info (device sda7): trying to use
> >>>>>>>>>>>> backup root at mount time
> >>>>>>>>>>>> [Sat Dec 22 12:20:36 2018] BTRFS info (device sda7): disk space
> >>>>>>>>>>>> caching is enabled
> >>>>>>>>>>>> [Sat Dec 22 12:20:36 2018] BTRFS info (device sda7): has skinny extents
> >>>>>>>>>>>> [Sat Dec 22 12:20:55 2018] BTRFS critical (device sda7): corrupt leaf:
> >>>>>>>>>>>> root=263 block=537133056 slot=98 ino=455338, name hash mismatch with
> >>>>>>>>>>>> key, have 0x000000007dd7ffcb expect 0x00000000dfc274ff
> >>>>>>>>>>>> [Sat Dec 22 12:20:55 2018] BTRFS critical (device sda7): corrupt leaf:
> >>>>>>>>>>>> root=263 block=537133056 slot=98 ino=455338, name hash mismatch with
> >>>>>>>>>>>> key, have 0x000000007dd7ffcb expect 0x00000000dfc274ff
> >>>>>>>>>>>> [Sat Dec 22 12:20:55 2018] BTRFS: error (device sda7) in
> >>>>>>>>>>>> merge_reloc_roots:2425: errno=-5 IO failure
> >>>>>>>>>>>> [Sat Dec 22 12:20:55 2018] BTRFS warning (device sda7): failed to
> >>>>>>>>>>>> recover relocation: -30
> >>>>>>>>>>>> [Sat Dec 22 12:20:55 2018] BTRFS error (device sda7): cleaner
> >>>>>>>>>>>> transaction attach returned -30
> >>>>>>>>>>>> [Sat Dec 22 12:20:55 2018] BTRFS error (device sda7): open_ctree failed
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> localhost:/home/linux # mount -t btrfs -o subvol=@,rw,usebackuproot
> >>>>>>>>>>>> UUID=133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5 /mnt/sda7
> >>>>>>>>>>>> mount: /mnt/sda7: wrong fs type, bad option, bad superblock on
> >>>>>>>>>>>> /dev/sdb7, missing codepage or helper program, or other error
> >>>>>>>>>>>> [Sat Dec 22 12:22:11 2018] BTRFS info (device sda7): trying to use
> >>>>>>>>>>>> backup root at mount time
> >>>>>>>>>>>> [Sat Dec 22 12:22:11 2018] BTRFS info (device sda7): disk space
> >>>>>>>>>>>> caching is enabled
> >>>>>>>>>>>> [Sat Dec 22 12:22:11 2018] BTRFS info (device sda7): has skinny extents
> >>>>>>>>>>>> [Sat Dec 22 12:22:29 2018] BTRFS critical (device sda7): corrupt leaf:
> >>>>>>>>>>>> root=263 block=537133056 slot=98 ino=455338, name hash mismatch with
> >>>>>>>>>>>> key, have 0x000000007dd7ffcb expect 0x00000000dfc274ff
> >>>>>>>>>>>> [Sat Dec 22 12:22:29 2018] BTRFS critical (device sda7): corrupt leaf:
> >>>>>>>>>>>> root=263 block=537133056 slot=98 ino=455338, name hash mismatch with
> >>>>>>>>>>>> key, have 0x000000007dd7ffcb expect 0x00000000dfc274ff
> >>>>>>>>>>>> [Sat Dec 22 12:22:29 2018] BTRFS: error (device sda7) in
> >>>>>>>>>>>> merge_reloc_roots:2425: errno=-5 IO failure
> >>>>>>>>>>>> [Sat Dec 22 12:22:29 2018] BTRFS warning (device sda7): failed to
> >>>>>>>>>>>> recover relocation: -30
> >>>>>>>>>>>> [Sat Dec 22 12:22:29 2018] BTRFS error (device sda7): cleaner
> >>>>>>>>>>>> transaction attach returned -30
> >>>>>>>>>>>> [Sat Dec 22 12:22:29 2018] BTRFS error (device sda7): open_ctree failed
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> localhost:/home/linux # btrfs rescue super-recover /dev/sda7
> >>>>>>>>>>>> All supers are valid, no need to recover
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> localhost:/home/linux # btrfs rescue zero-log /dev/sda7
> >>>>>>>>>>>> Clearing log on /dev/sda7, previous log_root 0, level 0
> >>>>>>>>>>>> localhost:/home/linux # btrfs rescue zero-log /dev/sdb7
> >>>>>>>>>>>> Clearing log on /dev/sdb7, previous log_root 0, level 0
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> localhost:/home/linux # btrfs rescue chunk-recover /dev/sda7
> >>>>>>>>>>>> Scanning: DONE in dev0, DONE in dev1
> >>>>>>>>>>>> We are going to rebuild the chunk tree on disk, it might destroy the
> >>>>>>>>>>>> old metadata on the disk, Are you sure? [y/N]: y
> >>>>>>>>>>>> Chunk tree recovered successfully
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>> localhost:/home/linux # btrfs check --repair /dev/sda7 2>&1 | tee
> >>>>>>>>>>>> /mnt/archive01/--RepairBTRFS/btrfs-check-sda7-repair-20181222.txt
> >>>>>>>>>>>> [1/7] checking root items
> >>>>>>>>>>>> Fixed 0 roots.
> >>>>>>>>>>>> [2/7] checking extents
> >>>>>>>>>>>> [3/7] checking free space cache
> >>>>>>>>>>>> [4/7] checking fs roots
> >>>>>>>>>>>> ERROR: DIR_ITEM[455338 3754063103] name
> >>>>>>>>>>>> 648C5FC8D5C2BB828ED86E44DD9E5FB3A643033276b6353640.first-shutdown.jsonlz4D19A0BCFCB.20181103140737858.wpsnda%202%20Questions%20Answered%20Lavaughn%20being%20a%20Nazi%20SS_20181029_1033.html0actor_20180213_20181028.html-25-17-.png=907-24%2011-57-47%7D.html
> >>>>>>>>>>>> namelen 40 filetype 1 mismatch with its hash, wanted 3754063103 have
> >>>>>>>>>>>> 2111307723
> >>>>>>>>>>>> root 263 inode 455338 errors 10, odd dir item
> >>>>>>>>>>>> unresolved ref dir 455338 index 0 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2BB828ED86E44DD9E5FB3A6430332 filetype 1 errors 6, no dir
> >>>>>>>>>>>> index, no inode ref
> >>>>>>>>>>>> unresolved ref dir 455338 index 5857 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2CB828ED86E44DD9E5FB3A6430332 filetype 1 errors 1, no dir
> >>>>>>>>>>>> item
> >>>>>>>>>>>> relocroot 263 inode 455338 errors 10, odd dir item
> >>>>>>>>>>>> unresolved ref dir 455338 index 0 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2BB828ED86E44DD9E5FB3A6430332 filetype 1 errors 6, no dir
> >>>>>>>>>>>> index, no inode ref
> >>>>>>>>>>>> unresolved ref dir 455338 index 5857 namelen 40 name
> >>>>>>>>>>>> 648C5FC8D5C2CB828ED86E44DD9E5FB3A6430332 filetype 1 errors 1, no dir
> >>>>>>>>>>>> item
> >>>>>>>>>>>> ERROR: errors found in fs roots
> >>>>>>>>>>>> enabling repair mode
> >>>>>>>>>>>> Opening filesystem to check...
> >>>>>>>>>>>> Checking filesystem on /dev/sda7
> >>>>>>>>>>>> UUID: 133e69bd-65d0-4af6-8a4b-5d2ddd6fefb5
> >>>>>>>>>>>> No device size related problem found
> >>>>>>>>>>>> cache and super generation don't match, space cache will be invalidated
> >>>>>>>>>>>> found 32460181504 bytes used, error(s) found
> >>>>>>>>>>>> total csum bytes: 28059520
> >>>>>>>>>>>> total tree bytes: 826392576
> >>>>>>>>>>>> total fs tree bytes: 739328000
> >>>>>>>>>>>> total extent tree bytes: 48562176
> >>>>>>>>>>>> btree space waste bytes: 171278836
> >>>>>>>>>>>> file data blocks allocated: 41415008256
> >>>>>>>>>>>> referenced 47803871232
> >>>>>>>>>>>> -----------------------------------
> >>>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>
> >>>>>>>
> >>>>>
> >>
>
