diff options
| author | David Howells <dhowells@redhat.com> | 2019-05-09 08:21:21 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2019-05-16 16:25:20 +0100 |
| commit | b960a34b73e4c1c972623bc2076e24b97588d09e (patch) | |
| tree | b7fafd6110ffa1aed594d55097755eea65da5d8d /net/rxrpc/conn_client.c | |
| parent | 0ab4c9594812c4bc5606daf0677ae304bf7ec8c8 (diff) | |
rxrpc: Allow the kernel to mark a call as being non-interruptible
Allow kernel services using AF_RXRPC to indicate that a call should be
non-interruptible. This allows kafs to make things like lock-extension and
writeback data storage calls non-interruptible.
If this is set, signals will be ignored for operations on that call where
possible - such as waiting to get a call channel on an rxrpc connection.
It doesn't prevent UDP sendmsg from being interrupted, but that will be
handled by packet retransmission.
rxrpc_kernel_recv_data() isn't affected by this since that never waits,
preferring instead to return -EAGAIN and leave the waiting to the caller.
Userspace initiated calls can't be set to be uninterruptible at this time.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/conn_client.c')
| -rw-r--r-- | net/rxrpc/conn_client.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c index 83797b3949e2..5cf5595a14d8 100644 --- a/net/rxrpc/conn_client.c +++ b/net/rxrpc/conn_client.c @@ -656,10 +656,14 @@ static int rxrpc_wait_for_channel(struct rxrpc_call *call, gfp_t gfp) add_wait_queue_exclusive(&call->waitq, &myself); for (;;) { - set_current_state(TASK_INTERRUPTIBLE); + if (test_bit(RXRPC_CALL_IS_INTR, &call->flags)) + set_current_state(TASK_INTERRUPTIBLE); + else + set_current_state(TASK_UNINTERRUPTIBLE); if (call->call_id) break; - if (signal_pending(current)) { + if (test_bit(RXRPC_CALL_IS_INTR, &call->flags) && + signal_pending(current)) { ret = -ERESTARTSYS; break; } |