diff options
| -rw-r--r-- | Documentation/networking/rxrpc.txt | 14 | ||||
| -rw-r--r-- | include/net/af_rxrpc.h | 1 | ||||
| -rw-r--r-- | net/rxrpc/af_rxrpc.c | 14 |
3 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/networking/rxrpc.txt b/Documentation/networking/rxrpc.txt index 67879992b4c2..605e00cdd6be 100644 --- a/Documentation/networking/rxrpc.txt +++ b/Documentation/networking/rxrpc.txt @@ -1080,6 +1080,20 @@ The kernel interface functions are as follows: successful, the timestamp will be stored into *_ts and true will be returned; false will be returned otherwise. + (*) Get remote client epoch. + + u32 rxrpc_kernel_get_epoch(struct socket *sock, + struct rxrpc_call *call) + + This allows the epoch that's contained in packets of an incoming client + call to be queried. This value is returned. The function always + successful if the call is still in progress. It shouldn't be called once + the call has expired. Note that calling this on a local client call only + returns the local epoch. + + This value can be used to determine if the remote client has been + restarted as it shouldn't change otherwise. + ======================= CONFIGURABLE PARAMETERS diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h index c4c912554dee..de587948042a 100644 --- a/include/net/af_rxrpc.h +++ b/include/net/af_rxrpc.h @@ -78,6 +78,7 @@ int rxrpc_kernel_retry_call(struct socket *, struct rxrpc_call *, int rxrpc_kernel_check_call(struct socket *, struct rxrpc_call *, enum rxrpc_call_completion *, u32 *); u32 rxrpc_kernel_check_life(struct socket *, struct rxrpc_call *); +u32 rxrpc_kernel_get_epoch(struct socket *, struct rxrpc_call *); bool rxrpc_kernel_get_reply_time(struct socket *, struct rxrpc_call *, ktime_t *); diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index 2fdd276f6842..013dbcb052e5 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -386,6 +386,20 @@ u32 rxrpc_kernel_check_life(struct socket *sock, struct rxrpc_call *call) EXPORT_SYMBOL(rxrpc_kernel_check_life); /** + * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call. + * @sock: The socket the call is on + * @call: The call to query + * + * Allow a kernel service to retrieve the epoch value from a service call to + * see if the client at the other end rebooted. + */ +u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call) +{ + return call->conn->proto.epoch; +} +EXPORT_SYMBOL(rxrpc_kernel_get_epoch); + +/** * rxrpc_kernel_check_call - Check a call's state * @sock: The socket the call is on * @call: The call to check |