tools/cephfs: include lost+found in scan_links

[batrick]

Otherwise, any injected dentries have incorrect first snapids.

Fixes: https://tracker.ceph.com/issues/59183

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[batrick]

2023-03-27T23:19:01.924 INFO:teuthology.orchestra.run.smithi018.stderr:2023-03-27T23:19:01.904+0000 7f37292527c0 10 datascan.scan_links: step 2: handling object 4.00000000
2023-03-27T23:19:01.924 INFO:teuthology.orchestra.run.smithi018.stderr:2023-03-27T23:19:01.904+0000 7f37292527c0  1 -- 172.21.15.18:0/699875016 --> [v2:172.21.15.136:6817/110352,v1:172.21.15.136:6819/110352] -- osd_op(unknown.0.0:68 30.3 30:c0ce80d4:::4.00000000:head [omap-get-vals in=16b] snapc 0=[] ondisk+read+known_if_redirected+supports_pool_eio e234) v8 -- 0x56054d224800 con 0x56054d112800
2023-03-27T23:19:01.924 INFO:teuthology.orchestra.run.smithi018.stderr:2023-03-27T23:19:01.905+0000 7f371a3fc700  1 -- 172.21.15.18:0/699875016 <== osd.6 v2:172.21.15.136:6817/110352 14 ==== osd_op_reply(68 4.00000000 [omap-get-vals out=513b] v0'0 uv2 ondisk = 0) v8 ==== 154+0+513 (crc 0 0 0) 0x56054d0f38c0 con 0x56054d112800
2023-03-27T23:19:01.924 INFO:teuthology.orchestra.run.smithi018.stderr:2023-03-27T23:19:01.905+0000 7f37292527c0 20 datascan.scan_links: injected ino detected
2023-03-27T23:19:01.925 INFO:teuthology.orchestra.run.smithi018.stderr:2023-03-27T23:19:01.905+0000 7f37292527c0 20 datascan.scan_links: adding 0x10000000001 for future processing to fix dnfirst

/teuthology/pdonnell-2023-03-27_22:29:12-fs-wip-pdonnell-testing-20230327.200655-distro-default-smithi/7221874/teuthology.log

Fixed now.

[batrick]

jenkins test make check arm64

[batrick]

jenkins test make check arm64

[batrick]

https://pulpito.ceph.com/?branch=wip-pdonnell-testing-20230323.162417

[vshankar]

I wonder if the first field corruption is a fallout from this issue? Seems alarmingly close to what we've been seeing.

[batrick]

I wonder if the first field corruption is a fallout from this issue? Seems alarmingly close to what we've been seeing.

We had thought so but it requires running cephfs-data-scan which none of the clusters had used (to our knowledge).