Re: btrfs check: backref lost, mismatch with its hash -- can't repair

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The complete check:

Checking filesystem on /dev/sdb3
UUID: de1723e2-150c-4448-bb36-be14d7d96093
ERROR: extent[64368619520, 524288] referencer count mismatch (root:
257, owner: 7804556, offset: 212992) wanted: 1, have: 0
ERROR: data extent[1862352896 425984] backref lost
ERROR: data extent[1886453760 479232] backref lost
ERROR: data extent[1902219264 524288] backref lost
ERROR: data extent[1817378816 151552] backref lost
ERROR: data extent[1799688192 57344] backref lost
ERROR: data extent[1830277120 258048] backref lost
ERROR: data extent[2558107648 1368064] backref lost
ERROR: errors found in extent allocation tree or chunk allocation
cache and super generation don't match, space cache will be invalidated
ERROR: root 257 DIR_ITEM[30039322 4007295565] couldn't find relative
INODE_ITEM[0] namelen 0 filename  filetype 0
ERROR: root 257 DIR_ITEM[30039322 4007295565] data_len shouldn't be 32907
ERROR: root 257 DIR_ITEM[30039322 4007295565] couldn't find relative
INODE_ITEM[0] namelen 3 filename  filetype 0
ERROR: root 258 EXTENT_DATA[1119172 1966080] prealloc shouldn't have datasum
ERROR: root 1327 EXTENT_DATA[60710 18219008] prealloc shouldn't have datasum
ERROR: root 1331 EXTENT_DATA[60710 18219008] prealloc shouldn't have datasum
ERROR: root 1333 EXTENT_DATA[60710 18219008] prealloc shouldn't have datasum
ERROR: root 1362 EXTENT_DATA[1119172 1966080] prealloc shouldn't have datasum
ERROR: root 1366 EXTENT_DATA[1119172 1966080] prealloc shouldn't have datasum
ERROR: root 1382 EXTENT_DATA[1119172 1966080] prealloc shouldn't have datasum
ERROR: root 1385 DIR_ITEM[30039322 2438219243] couldn't find relative
INODE_ITEM[0] namelen 12 filename metadata.xml filetype 1
ERROR: root 1385 DIR INODE [30039322] size(152) not equal to 136
ERROR: root 1385 INODE REF[30039324 30039322] and DIR_ITEM[30039322
2438219243] mismatch namelen 12 filename metadata.xml filetype 1
found 104348008448 bytes used err is -5
total csum bytes: 99534904
total tree bytes: 3204612096
total fs tree bytes: 2984034304
total extent tree bytes: 87818240
btree space waste bytes: 778261104
file data blocks allocated: 242964852736
 referenced 198454632448
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