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Date:   Thu, 28 Apr 2022 14:42:41 -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 Thu, Apr 28, 2022 at 04:58:24PM -0400, Josef Bacik wrote:
> -2 is enoent, it must have committed with the deleted block, which is
> sort of scary but at this point I'll take it.  Go ahead and do the
> init-extent-tree.  Thanks,

Same output :(
Xilinx_Unified_2020.1_0602_1208/tps/lnx64/jre9.0.4/lib/modules
Failed to find [3700677820416, 168, 53248]

it's the one we just tried to clear, and got enoent on.
Unless -r 11223 is not the correct value? (not sure where it came from)
gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs-corrupt-block -d "3700677820416,168,53248" -r 11223 /dev/mapper/dshelf1
FS_INFO IS 0x55d8bac70600
JOSEF: root 9
Couldn't find the last root for 8
FS_INFO AFTER IS 0x55d8bac70600
Error searching to node -2

New run still returns the same thing:
        item 188 key (1834097 EXTENT_DATA 57147392) itemoff 5346 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7451684257792 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 189 key (1834097 EXTENT_DATA 57671680) itemoff 5293 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7451684782080 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 190 key (1834097 EXTENT_DATA 58195968) itemoff 5240 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7451685568512 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 191 key (1834097 EXTENT_DATA 58720256) itemoff 5187 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7457553899520 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 192 key (1834097 EXTENT_DATA 59244544) itemoff 5134 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7457554423808 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 193 key (1834097 EXTENT_DATA 59768832) itemoff 5081 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7457561710592 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 194 key (1834097 EXTENT_DATA 60293120) itemoff 5028 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7457563021312 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
        item 195 key (1834097 EXTENT_DATA 60817408) itemoff 4975 itemsize 53
                generation 1590259 type 1 (regular)
                extent data disk byte 7457564856320 nr 524288
                extent data offset 0 nr 524288 ram 524288
                extent compression 0 (none)
elem_cnt 1 elem_missed 0 ret 0
Xilinx_Unified_2020.1_0602_1208/tps/lnx64/jre9.0.4/lib/modules
Failed to find [3700677820416, 168, 53248]

Program received signal SIGSEGV, Segmentation fault.
rb_search (root=root@entry=0x100000060, key=key@entry=0x7fffffffd640, comp=comp@entry=0x55555559aee0 <cache_tree_comp_range>, 
    next_ret=next_ret@entry=0x7fffffffd658) at common/rbtree-utils.c:48
48              struct rb_node *n = root->rb_node;
(gdb) bt
#0  rb_search (root=root@entry=0x100000060, key=key@entry=0x7fffffffd640, comp=comp@entry=0x55555559aee0 <cache_tree_comp_range>, 
    next_ret=next_ret@entry=0x7fffffffd658) at common/rbtree-utils.c:48
#1  0x000055555559b0e4 in search_cache_extent (tree=tree@entry=0x100000060, start=start@entry=15645157801984)
    at common/extent-cache.c:179
#2  0x0000555555584c72 in set_extent_bits (tree=0x100000060, start=15645157801984, end=15645157801983, bits=bits@entry=1)
    at kernel-shared/extent_io.c:380
#3  0x0000555555584ea5 in set_extent_dirty (tree=<optimized out>, start=<optimized out>, end=<optimized out>)
    at kernel-shared/extent_io.c:486
#4  0x0000555555585888 in set_extent_buffer_dirty (eb=eb@entry=0x55555d2ab870) at kernel-shared/extent_io.c:976
#5  0x000055555557bc56 in btrfs_mark_buffer_dirty (eb=eb@entry=0x55555d2ab870) at kernel-shared/disk-io.c:2224
#6  0x000055555557ee7f in setup_inline_extent_backref (refs_to_add=1, offset=1835008, owner=1834097, root_objectid=93825123431232, 
    parent=0, iref=0xffffffffffffffe3, path=0x55555d273340, root=<optimized out>) at kernel-shared/extent-tree.c:1085
#7  insert_inline_extent_backref (refs_to_add=1, offset=1835008, owner=1834097, root_objectid=93825123431232, parent=0, 
    num_bytes=<optimized out>, bytenr=<optimized out>, path=0x55555d273340, root=<optimized out>, trans=<optimized out>)
    at kernel-shared/extent-tree.c:1197
#8  btrfs_inc_extent_ref (trans=trans@entry=0x555556fcc400, root=root@entry=0x555556faefe0, bytenr=<optimized out>, 
    num_bytes=<optimized out>, parent=parent@entry=0, root_objectid=root_objectid@entry=11223, owner=1834097, offset=1835008)
    at kernel-shared/extent-tree.c:1262
#9  0x00005555555dfeb4 in process_eb (trans=trans@entry=0x555556fcc400, root=root@entry=0x555556faefe0, eb=eb@entry=0x55555d283370, 
    current=current@entry=0x7fffffffdae8) at cmds/rescue-init-extent-tree.c:659
#10 0x00005555555e000d in process_eb (trans=trans@entry=0x555556fcc400, root=root@entry=0x555556faefe0, eb=eb@entry=0x555556461260, 
    current=current@entry=0x7fffffffdae8) at cmds/rescue-init-extent-tree.c:734
#11 0x00005555555e000d in process_eb (trans=trans@entry=0x555556fcc400, root=root@entry=0x555556faefe0, eb=0x555555f0c680, 
    current=current@entry=0x7fffffffdae8) at cmds/rescue-init-extent-tree.c:734
#12 0x00005555555e0278 in record_root (root=root@entry=0x555556faefe0) at cmds/rescue-init-extent-tree.c:805
#13 0x00005555555e1104 in record_roots (fs_info=0x55555564cbc0) at cmds/rescue-init-extent-tree.c:860
#14 btrfs_init_extent_tree (path=path@entry=0x7fffffffe1cd "/dev/mapper/dshelf1") at cmds/rescue-init-extent-tree.c:944
#15 0x00005555555d7a4e 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=0x555555642d40 <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=0x555555643cc0 <cmd_struct_rescue>) at cmds/commands.h:125
#19 main (argc=3, argv=0x7fffffffdeb0) at btrfs.c:405

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