[LU-10028] Export the information about Lustre special mount flags and options

• Type: New Feature
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.11.0
• Labels: patch
• Assignee: Qian Yingjin (Inactive)
• Reporter: Qian Yingjin (Inactive)

Description

Some users need the information about Lustre mount. But the information exported by /proc/mounts is not enough especially for some Lustre special mount options and flags such as abort_recov, noir, etc.

This patch can export some Lustre special mount information. i.e.

[root@QYJ tests]# cat /sys/kernel/debug/lustre/mounts 
profile: lustre-MDT0000 device: /dev/loop0 flags: 3200 options: user_xattr,errors=remount-ro
profile: lustre-OST0000 device: /dev/loop1 flags: 3000 options: ,errors=remount-ro
profile: lustre-OST0001 device: /dev/loop2 flags: 3000 options: ,errors=remount-ro
profile: lustre-client device: 192.168.59.129@tcp:/lustre flags: 2 options: user_xattr,flock

Issue Links

• is related to: LU-10677 can't delete directory
• is related to: LU-10887 2 MDTs stuck in WAITING
• is related to: LU-10087 sanity-lfsck test_1a: (7) no FID-in-dirent.
• is related to: LU-8066 Move lustre procfs handling to sysfs and debugfs.