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Date:   Mon, 6 Jun 2022 14:50:13 -0700
From:   Marc MERLIN <marc@merlins.org>
To:     Josef Bacik <josef@toxicpanda.com>
Cc:     linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Rebuilding 24TB Raid5 array (was btrfs corruption: parent
 transid verify failed + open_ctree failed)
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On Mon, Jun 06, 2022 at 05:39:45PM -0400, Josef Bacik wrote:
> On Mon, Jun 6, 2022 at 5:23 PM Marc MERLIN <marc@merlins.org> wrote:
> >
> > On Mon, Jun 06, 2022 at 05:19:40PM -0400, Josef Bacik wrote:
> > > Nope different spot, I added some more printf's to narrow down which
> > > path is messing up the key order.  Thanks,
> >
> > processed 49152 of 49463296 possible bytes, 0%
> > searching 164623 for bad extents
> > processed 311296 of 63193088 possible bytes, 0%
> > searching 164624 for bad extents
> >
> > Found an extent we don't have a block group for in the file
> > file
> > push node left from right mid nritems 48 right nritems 0
> > setting parent slot 0 to [256 1 0]
> > corrupt node: root=164624 root bytenr 15645019684864 commit bytenr 15645019602944 block=15645019717632 physical=18446744073709551615 slot=38, bad key order, current (7819 1 0) next (7819 1 0)
> 
> Hmm, this sounds like we're not adjusting nritems, but the code
> definitely is, so I'm sort of nervous about what's going to be
> uncovered here.  Added some more information,

processed 49152 of 49463296 possible bytes, 0%
searching 164623 for bad extents
processed 311296 of 63193088 possible bytes, 0%
searching 164624 for bad extents

Found an extent we don't have a block group for in the file
file
push node left from right mid nritems 48 right nritems 0 parent 15645019684864 parent nritems 7
parent nritems is now 6
corrupt node: root=164624 root bytenr 15645019684864 commit bytenr 15645019602944 block=15645019717632 physical=18446744073709551615 slot=38, bad key order, current (7819 1 0) next (7819 1 0)
kernel-shared/ctree.c:1042: balance_level: BUG_ON `check_path(path)` triggered, value -5
./btrfs(+0x1cf51)[0x557f0d136f51]
./btrfs(btrfs_search_slot+0x102a)[0x557f0d13c86d]
./btrfs(+0x8cc50)[0x557f0d1a6c50]
./btrfs(+0x8c97f)[0x557f0d1a697f]
./btrfs(+0x8c97f)[0x557f0d1a697f]
./btrfs(+0x8cf6e)[0x557f0d1a6f6e]
./btrfs(+0x8c779)[0x557f0d1a6779]
./btrfs(btrfs_init_extent_tree+0xc83)[0x557f0d1a8506]
./btrfs(+0x84518)[0x557f0d19e518]
./btrfs(handle_command_group+0x49)[0x557f0d13217b]
./btrfs(main+0x94)[0x557f0d132275]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xcd)[0x7f54f44bb7fd]
./btrfs(_start+0x2a)[0x557f0d131e1a]
Aborted

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Home page: http://marc.merlins.org/