[LU-12174] Overly permissive fs name matching in liblustreap::get_root_path

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.9.0, Lustre 2.10.7, Lustre 2.12.1
• Severity: 3
• Assignee: WC Triage
• Reporter: Nathaniel Clark

Description

http://review.whamcloud.com/5007 (LU-28  fileset: add fileset mount support) introduced an issue in fs name matching in get_root_path().

[root@ieel-c01 ~]# findmnt -t lustre
TARGET   SOURCE                                  FSTYPE OPTIONS
/mnt/fs1 192.168.56.11@tcp:192.168.56.10@tcp:/fs lustre rw,lazystatfs
[root@ieel-c01 ~]# lfs fid2path fs [0x2000013a2:0x229:0x0]
core.4697
[root@ieel-c01 ~]# lfs fid2path fsBAD [0x2000013a2:0x229:0x0]
core.4697

If another filesystem with a name of fsX is mounted on the client, fid2path (which uses get_root_path() to find the filesystem) may not match the correct filesystem when searching.