[LU-15873] Make mounting with "-o rdonly_dev" work

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Assignee: Arshad Hussain
• Reporter: Arshad Hussain

Description

Make target mounting with "-o rdonly_dev" work.

 "rdonly_dev"  currently does not work. While the "rdonly_dev" returns "Operation not supported" from OSD. It is a simple flag check which is doing the returning, removing the check seems to work.

Mounting with "rdonly_dev" 

# umount /mnt/lustre-mds1
# mount.lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1 -o rdonly_dev
mount.lustre: mount /dev/mapper/mds1_flakey at /mnt/lustre-mds1 failed: Operation not supported

Logs:

(obd_config.c:774:class_setup()) setup lustre-MDT0000-osd failed (-95)
(obd_mount.c:200:lustre_start_simple()) lustre-MDT0000-osd setup error -95
(obd_mount_server.c:1993:server_fill_super()) Unable to start osd on /dev/mapper/mds1_flakey: -95
(super25.c:176:lustre_fill_super()) llite: Unable to mount <unknown>: rc = -95

 

Issue Links

• is related to: LU-13979 take care of rdonly mode for mdt_close