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authorDavid Howells <dhowells@redhat.com>2017-10-18 11:36:39 +0100
committerDavid Howells <dhowells@redhat.com>2017-10-18 11:37:20 +0100
commita68f4a27f55f1d54e35c270aff89383da4b1b656 (patch)
tree72d70f77bee499627425bfaf8df64693320dbc67 /net/rxrpc
parent8a5f2166a6288ee4b5a393f1ebc8cfb26b0510f0 (diff)
downloadlinux-a68f4a27f55f1d54e35c270aff89383da4b1b656.tar.bz2
rxrpc: Support service upgrade from a kernel service
Provide support for a kernel service to make use of the service upgrade facility. This involves: (1) Pass an upgrade request flag to rxrpc_kernel_begin_call(). (2) Make rxrpc_kernel_recv_data() return the call's current service ID so that the caller can detect service upgrade and see what the service was upgraded to. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc')
-rw-r--r--net/rxrpc/af_rxrpc.c5
-rw-r--r--net/rxrpc/recvmsg.c5
2 files changed, 8 insertions, 2 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index fb17552fd292..481f7dc90ba2 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -265,6 +265,7 @@ static int rxrpc_listen(struct socket *sock, int backlog)
* @tx_total_len: Total length of data to transmit during the call (or -1)
* @gfp: The allocation constraints
* @notify_rx: Where to send notifications instead of socket queue
+ * @upgrade: Request service upgrade for call
*
* Allow a kernel service to begin a call on the nominated socket. This just
* sets up all the internal tracking structures and allocates connection and
@@ -279,7 +280,8 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
unsigned long user_call_ID,
s64 tx_total_len,
gfp_t gfp,
- rxrpc_notify_rx_t notify_rx)
+ rxrpc_notify_rx_t notify_rx,
+ bool upgrade)
{
struct rxrpc_conn_parameters cp;
struct rxrpc_call *call;
@@ -304,6 +306,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
cp.key = key;
cp.security_level = 0;
cp.exclusive = false;
+ cp.upgrade = upgrade;
cp.service_id = srx->srx_service;
call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, tx_total_len,
gfp);
diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c
index bdece21f313d..e4937b3f3685 100644
--- a/net/rxrpc/recvmsg.c
+++ b/net/rxrpc/recvmsg.c
@@ -607,6 +607,7 @@ wait_error:
* @_offset: The running offset into the buffer.
* @want_more: True if more data is expected to be read
* @_abort: Where the abort code is stored if -ECONNABORTED is returned
+ * @_service: Where to store the actual service ID (may be upgraded)
*
* Allow a kernel service to receive data and pick up information about the
* state of a call. Returns 0 if got what was asked for and there's more
@@ -624,7 +625,7 @@ wait_error:
*/
int rxrpc_kernel_recv_data(struct socket *sock, struct rxrpc_call *call,
void *buf, size_t size, size_t *_offset,
- bool want_more, u32 *_abort)
+ bool want_more, u32 *_abort, u16 *_service)
{
struct iov_iter iter;
struct kvec iov;
@@ -680,6 +681,8 @@ int rxrpc_kernel_recv_data(struct socket *sock, struct rxrpc_call *call,
read_phase_complete:
ret = 1;
out:
+ if (_service)
+ *_service = call->service_id;
mutex_unlock(&call->user_mutex);
_leave(" = %d [%zu,%d]", ret, *_offset, *_abort);
return ret;