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Date:   Mon, 9 May 2022 18:32:01 -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, May 09, 2022 at 09:18:32PM -0400, Josef Bacik wrote:
> On Mon, May 9, 2022 at 9:08 PM Marc MERLIN <marc@merlins.org> wrote:
> >
> > On Mon, May 09, 2022 at 09:04:36PM -0400, Josef Bacik wrote:
> > > On Mon, May 9, 2022 at 1:19 PM Marc MERLIN <marc@merlins.org> wrote:
> > > >
> > > > On Mon, May 09, 2022 at 01:09:37PM -0400, Josef Bacik wrote:
> > > > > Ugh shit, I had an off by one error, that's not great.  I've fixed
> > > > > that up and adjusted the debugging, lets see how that goes.  Thanks,
> > > >
> > >
> > > Sorry my laptop battery died while I was at the dealership, and of
> > > course that took allllll day.  Anyway pushed some debugging, am
> > > confused, hopefully won't be confused long.  Thanks,
> >
> > Sorry :-/
> > Yeah, I bring my power supply in such cases :)
> >
> > Did you upload?
> > sauron:/var/local/src/btrfs-progs-josefbacik# git pull
> > Already up to date.
> 
> Sorry, long day, try it again.  Thanks,

processed 49152 of 75792384 possible bytes, 0%
Recording extents for root 165098
processed 1015808 of 108756992 possible bytes, 0%
Recording extents for root 165100
processed 16384 of 49479680 possible bytes, 0%
Recording extents for root 165198
processed 491520 of 108756992 possible bytes, 0%WTF???? we think we already inserted this bytenr?? [76300, 108, 0] dumping paths 10467695652864 8675328
misc/add0/new/file
Failed to find [10467695652864, 168, 8675328]

Program received signal SIGSEGV, Segmentation fault.
rb_search (root=root@entry=0x100000060, key=key@entry=0x7fffffffd540, comp=comp@entry=0x55555559af95 <cache_tree_comp_range>, 
    next_ret=next_ret@entry=0x7fffffffd558) at common/rbtree-utils.c:55
55              struct rb_node *n = root->rb_node;
(gdb) bt
#0  rb_search (root=root@entry=0x100000060, key=key@entry=0x7fffffffd540, comp=comp@entry=0x55555559af95 <cache_tree_comp_range>, 
    next_ret=next_ret@entry=0x7fffffffd558) at common/rbtree-utils.c:55
#1  0x000055555559b199 in search_cache_extent (tree=tree@entry=0x100000060, start=start@entry=15645363896320)
    at common/extent-cache.c:179
#2  0x0000555555584d27 in set_extent_bits (tree=0x100000060, start=15645363896320, end=15645363896319, bits=bits@entry=1)
    at kernel-shared/extent_io.c:380
#3  0x0000555555584f5a in set_extent_dirty (tree=<optimized out>, start=<optimized out>, end=<optimized out>)
    at kernel-shared/extent_io.c:486
#4  0x000055555558593d in set_extent_buffer_dirty (eb=eb@entry=0x55556fe993b0) at kernel-shared/extent_io.c:976
#5  0x000055555557bc2a in btrfs_mark_buffer_dirty (eb=eb@entry=0x55556fe993b0) at kernel-shared/disk-io.c:2224
#6  0x000055555557ef4c in setup_inline_extent_backref (refs_to_add=1, offset=0, owner=76300, root_objectid=93825336391296, parent=0, 
    iref=0xffffffffffffffe3, path=0x555569d8b680, root=<optimized out>) at kernel-shared/extent-tree.c:1085
#7  insert_inline_extent_backref (refs_to_add=1, offset=0, owner=76300, root_objectid=93825336391296, parent=0, 
    num_bytes=<optimized out>, bytenr=<optimized out>, path=0x555569d8b680, root=<optimized out>, trans=<optimized out>)
    at kernel-shared/extent-tree.c:1197
#8  btrfs_inc_extent_ref (trans=trans@entry=0x55557058a2f0, root=root@entry=0x555559154170, bytenr=<optimized out>, 
    num_bytes=<optimized out>, parent=parent@entry=0, root_objectid=root_objectid@entry=165198, owner=76300, offset=0)
    at kernel-shared/extent-tree.c:1262
#9  0x00005555555e087d in process_eb (trans=trans@entry=0x55557058a2f0, root=root@entry=0x555559154170, eb=eb@entry=0x55557411e240, 
    current=current@entry=0x7fffffffd9e8) at cmds/rescue-init-extent-tree.c:986
#10 0x00005555555e09e8 in process_eb (trans=trans@entry=0x55557058a2f0, root=root@entry=0x555559154170, eb=eb@entry=0x55557411a1c0, 
    current=current@entry=0x7fffffffd9e8) at cmds/rescue-init-extent-tree.c:1061
#11 0x00005555555e09e8 in process_eb (trans=trans@entry=0x55557058a2f0, root=root@entry=0x555559154170, eb=0x555559218660, 
    current=current@entry=0x7fffffffd9e8) at cmds/rescue-init-extent-tree.c:1061
#12 0x00005555555e0c98 in record_root (root=0x555559154170) at cmds/rescue-init-extent-tree.c:1137
#13 0x00005555555dfda6 in foreach_root (fs_info=fs_info@entry=0x55555564dbc0, cb=cb@entry=0x5555555e0b93 <record_root>)
    at cmds/rescue-init-extent-tree.c:151
#14 0x00005555555e100a in btrfs_init_extent_tree (path=path@entry=0x7fffffffe1ce "/dev/mapper/dshelf1")
    at cmds/rescue-init-extent-tree.c:1216
#15 0x00005555555d7b70 in cmd_rescue_init_extent_tree (cmd=<optimized out>, argc=<optimized out>, argv=<optimized out>)
    at cmds/rescue.c:65
#16 0x000055555556c17b in cmd_execute (argv=0x7fffffffdeb8, argc=2, cmd=0x555555643d40 <cmd_struct_rescue_init_extent_tree>)
    at cmds/commands.h:125
#17 handle_command_group (cmd=<optimized out>, argc=2, argv=0x7fffffffdeb8) at btrfs.c:152
#18 0x000055555556c275 in cmd_execute (argv=0x7fffffffdeb0, argc=3, cmd=0x555555644cc0 <cmd_struct_rescue>) at cmds/commands.h:125
#19 main (argc=3, argv=0x7fffffffdeb0) at btrfs.c:405

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