[LU-12420] llog_reader crashes when reading llog that is not inited

Related — Fri, 26 Aug 2022 05:39:05 +0000

I think the problem is easy to reproduce. On a Lustre file system that doesn't have nodemap configured, which is the majority case I think, do the following:

mount -t ldiskfs $MGT $MNT
llog_reader $MNT/CONFIGS/nodemap
llog_reader will quit with following error:

 llog_reader: Error allocating -16 bytes for recs_buf: Cannot allocate memory (12)
 llog_reader: Could not pack buffer.: Cannot allocate memory (12)

Apparently, the llog of nodemap is never initialized so all the values are gabage.

Header size : 3987452397
Time : Fri Jan 2 20:30:12 1970
Number of records: 4294967295
Target uuid :

I think in this case, llog_reader should just quit with proper message printed.

Whamcloud Community JIRA

[LU-12420] llog_reader crashes when reading llog that is not inited