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Commit a819ecc1 authored by Jeff Layton's avatar Jeff Layton Committed by J. Bruce Fields
Browse files

nfsd: add locking to stateowner release 



Once we remove the client_mutex, we'll need to properly protect
the stateowner reference counts using the cl_lock.

Signed-off-by: default avatarJeff Layton <jlayton@primarydata.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 882e9d25

fs/nfsd/nfs4state.c

+6 −9
Original line number Diff line number Diff line
@@ -937,9 +937,14 @@ release_all_access(struct nfs4_ol_stateid *stp) 


static void nfs4_put_stateowner(struct nfs4_stateowner *sop)

{

	if (!atomic_dec_and_test(&sop->so_count))

	struct nfs4_client *clp = sop->so_client;



	might_lock(&clp->cl_lock);



	if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))

		return;

	sop->so_ops->so_unhash(sop);

	spin_unlock(&clp->cl_lock);

	kfree(sop->so_owner.data);

	sop->so_ops->so_free(sop);

}
@@ -3078,11 +3083,7 @@ static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, u 


static void nfs4_unhash_openowner(struct nfs4_stateowner *so)

{

	struct nfs4_client *clp = so->so_client;



	spin_lock(&clp->cl_lock);

	unhash_openowner_locked(openowner(so));

	spin_unlock(&clp->cl_lock);

}



static void nfs4_free_openowner(struct nfs4_stateowner *so)
@@ -4842,11 +4843,7 @@ find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, 


static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)

{

	struct nfs4_client *clp = sop->so_client;



	spin_lock(&clp->cl_lock);

	unhash_lockowner_locked(lockowner(sop));

	spin_unlock(&clp->cl_lock);

}



static void nfs4_free_lockowner(struct nfs4_stateowner *sop)