int ptlrpc_connection_put(struct ptlrpc_connection *conn)
{
int rc = 0;
ENTRY;
if (!conn)
RETURN(rc);
LASSERT(!cfs_hlist_unhashed(&conn->c_hash));
/*
* We do not remove connection from hashtable and
* do not free it even if last caller released ref,
* as we want to have it cached for the case it is
* needed again.
*
* Deallocating it and later creating new connection
* again would be wastful. This way we also avoid
* expensive locking to protect things from get/put
* race when found cached connection is freed by
* ptlrpc_connection_put().
*
* It will be freed later in module unload time,
* when ptlrpc_connection_fini()->lh_exit->conn_exit()
* path is called.
*/
if (cfs_atomic_dec_return(&conn->c_refcount) == 1)
rc = 1;
CDEBUG(D_INFO, "PUT conn=%p refcount %d to %s\n",
conn, cfs_atomic_read(&conn->c_refcount),
libcfs_nid2str(conn->c_peer.nid));
RETURN(rc);
}
int lov_free_memmd(struct lov_stripe_md **lsmp)
{
struct lov_stripe_md *lsm = *lsmp;
int refc;
*lsmp = NULL;
LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 0);
if ((refc = cfs_atomic_dec_return(&lsm->lsm_refc)) == 0) {
LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
lsm_op_find(lsm->lsm_magic)->lsm_free(lsm);
}
return refc;
}
