[lkml]   [2009]   [Jan]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Patch in this message
    Subject[PATCH 2/2] 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 <>
    fs/nfsd/nfs4state.c | 1 -
    1 files changed, 0 insertions(+), 1 deletions(-)

    diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
    index 88db7d3..b6f60f4 100644
    --- a/fs/nfsd/nfs4state.c
    +++ b/fs/nfsd/nfs4state.c
    @@ -2871,7 +2871,6 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
    file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
    file_lock.fl_pid = current->tgid;
    file_lock.fl_flags = FL_POSIX;
    - file_lock.fl_lmops = &nfsd_posix_mng_ops;

    file_lock.fl_start = lockt->lt_offset;
    file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);

     \ /
      Last update: 2009-01-22 20:19    [W:0.022 / U:22.736 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site