From: Trond Myklebust Date: Wed, 30 Jul 2014 01:34:17 +0000 (-0400) Subject: nfsd: Ensure that nfs4_open_delegation() references the delegation stateid X-Git-Tag: v3.17-rc1~58^2~67 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=67cb1279be27345ba6855c1aab9e90ef5f5ac645;p=karo-tx-linux.git nfsd: Ensure that nfs4_open_delegation() references the delegation stateid Ensure that nfs4_open_delegation() keeps a reference to the delegation stateid until it is done working with it. Necessary step toward client_mutex removal. Signed-off-by: Trond Myklebust Signed-off-by: J. Bruce Fields --- diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 4f191456d737..2df6af93120e 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -674,6 +674,7 @@ hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) lockdep_assert_held(&state_lock); lockdep_assert_held(&fp->fi_lock); + atomic_inc(&dp->dl_stid.sc_count); dp->dl_stid.sc_type = NFS4_DELEG_STID; list_add(&dp->dl_perfile, &fp->fi_delegations); list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); @@ -3704,6 +3705,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", STATEID_VAL(&dp->dl_stid.sc_stateid)); open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; + nfs4_put_stid(&dp->dl_stid); return; out_no_deleg: open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;