[LU-2625] lustre_rmmod sometimes returns unexpected errors

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0, Lustre 2.1.4
• Environment: lustre 2.3.58; redhat 6.3
• Severity: 3

Epic

modules

• Assignee: Bruno Faccini (Inactive)
• Reporter: Gregoire Pichon

Description

lustre_rmmod sometimes returns errors that should not be displayed to end user.

When lustre modules are already all unloaded

# lustre_rmmod
open /proc/sys/lnet/dump_kernel failed: No such file or directory
open(dump_kernel) failed: No such file or directory

In a lustre router configuration, when loaded lustre modules are only: libcfs, lnet and lnds

# lustre_rmmod
error: dl: No such file or directory opening /proc/fs/lustre/devices
opening /dev/obd failed: No such device
hint: the kernel modules may not be loaded
Error getting device list: No such device: check dmesg.

When executed from a non-root user

$ lustre_rmmod
error: dl: No such file or directory opening /proc/fs/lustre/devices
opening /dev/obd failed: Permission denied
hint: the kernel modules may not be loaded
Error getting device list: Permission denied: check dmesg.
open /proc/sys/lnet/dump_kernel failed: Permission denied
open(dump_kernel) failed: Permission denied
Modules still loaded:
libcfs/libcfs/libcfs.o