diff options
Diffstat (limited to 'include/linux/sunrpc/svc_xprt.h')
| -rw-r--r-- | include/linux/sunrpc/svc_xprt.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index bb182979569..bbdb680ffbe 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -33,6 +33,16 @@ struct svc_xprt_class { u32 xcl_max_payload; }; +/* + * This is embedded in an object that wants a callback before deleting + * an xprt; intended for use by NFSv4.1, which needs to know when a + * client's tcp connection (and hence possibly a backchannel) goes away. + */ +struct svc_xpt_user { + struct list_head list; + void (*callback)(struct svc_xpt_user *); +}; + struct svc_xprt { struct svc_xprt_class *xpt_class; struct svc_xprt_ops *xpt_ops; @@ -67,10 +77,25 @@ struct svc_xprt { struct sockaddr_storage xpt_remote; /* remote peer's address */ size_t xpt_remotelen; /* length of address */ struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */ + struct list_head xpt_users; /* callbacks on free */ struct net *xpt_net; }; +static inline void register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u) +{ + spin_lock(&xpt->xpt_lock); + list_add(&u->list, &xpt->xpt_users); + spin_unlock(&xpt->xpt_lock); +} + +static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u) +{ + spin_lock(&xpt->xpt_lock); + list_del_init(&u->list); + spin_unlock(&xpt->xpt_lock); +} + int svc_reg_xprt_class(struct svc_xprt_class *); void svc_unreg_xprt_class(struct svc_xprt_class *); void svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *, |