[LU-16888] Fix ptlrpc_gss automatic loading

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Affects Version/s: Lustre 2.16.0
• Labels: gss patch sec
• Severity: 3
• Assignee: Sebastien Buisson
• Reporter: Sebastien Buisson

Description

ptlrpc_gss kernel module is automatically loaded when a GSS security flavor is enforced. But this works only once, because loading success is stored in a static variable in the ptlrpc module. If ptlrpc_gss is manually unloaded, while keeping ptlrpc loaded, next mount attempt fails.

mgs# lctl conf_param testfs.srpc.flavor.default.cli2mdt=krb5n
client# mount -t lustre mgs@tcp:/testfs /mnt/testfs
client# umount /mnt/testfs
client# rmmod ptlrpc_gss
client# mount -t lustre mgs@tcp:/testfs /mnt/testfs
mount.lustre: mount mgs@tcp:/testfs at /mnt/testfs failed: Operation not permitted