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23 October 2021, 00:29:24 UTC
Revision fa82a491275a613b15489aab4b99acecb00958d3 authored by Jeff Layton on 22 January 2009, 19:16:04 UTC, committed by J. Bruce Fields on 27 January 2009, 22:26:59 UTC 
nfsd: only set file_lock.fl_lmops in nfsd4_lockt if a stateowner is found
 
nfsd4_lockt does a search for a lockstateowner when building the lock
struct to test. If one is found, it'll set fl_owner to it. Regardless of
whether that happens, it'll also set fl_lmops. Given that this lock is
basically a "lightweight" lock that's just used for checking conflicts,
setting fl_lmops is probably not appropriate for it.

This behavior exposed a bug in DLM's GETLK implementation where it
wasn't clearing out the fields in the file_lock before filling in
conflicting lock info. While we were able to fix this in DLM, it
still seems pointless and dangerous to set the fl_lmops this way
when we may have a NULL lockstateowner.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@pig.fieldses.org>
1 parent b914152
History
Tip revision: fa82a491275a613b15489aab4b99acecb00958d3 authored by Jeff Layton on 22 January 2009, 19:16:04 UTC
nfsd: only set file_lock.fl_lmops in nfsd4_lockt if a stateowner is found
Tip revision: fa82a49
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