Hi,
Recently while using ntfs-3g (2017.3.23AR.5) driver with the dedupe plugin
(1.2.5),
we encountered the following error while trying to read certain files on a
dedup mount.
[user@node-3 Desktop]$ file <REDACTED>.pdf
<REDACTED>.pdf: ERROR: cannot read (Operation not supported)
Mounting with the "debug" option and then retrying the above operation, we
got this error
in /var/log/messages:
[user@node-3 Desktop]$ sudo grep "ntfs-3g" /var/log/ -r
/var/log/messages:Feb 23 00:31:44 node-3 ntfs-3g[14691]: Unexpected dedup
format code 0x103
/var/log/messages:Feb 23 00:31:44 node-3 ntfs-3g[14691]: Unexpected dedup
format code 0x103
/var/log/messages:Feb 23 00:31:44 node-3 ntfs-3g[14691]: Unexpected dedup
format code 0x103
In the source code of dedup plugin there is this switch case for reparse
format code:
1377 /* Assume the format defines a minor.major type
version */
1378 switch (le16_to_cpu(dedup_reparse->format)) {
1379 case 0x0201 :
1380 res = dedup_read_short(ni, reparse,
1381 buf, size, offset);
1382 break;
1383 case 0x0102 :
1384 res = dedup_read_long(ni, reparse,
1385 buf, size, offset);
1386 break;
1387 default :
1388 ntfs_log_error("Unexpected dedup format code
0x%x\n",
1389
(int)le16_to_cpu(dedup_reparse->format));
1390 break;
We see that there are only two format codes at the moment, i.e 0x201 and
0x102. Can I get some help
regarding the third one (0x103), like what is it and how to reliably
reproduce and fix this issue?
I would appreciate any pointers for the same.
Thanks and Regards,
Aniket Pandey
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