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| 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/sendmsg.c | |
| parent | 0ab4c9594812c4bc5606daf0677ae304bf7ec8c8 (diff) | |
| download | linux-b960a34b73e4c1c972623bc2076e24b97588d09e.tar.bz2 | |
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/sendmsg.c')
| -rw-r--r-- | net/rxrpc/sendmsg.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index bec64deb7b0a..45a05d9a27fa 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -80,7 +80,8 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx, if (call->state >= RXRPC_CALL_COMPLETE) return call->error; - if (timeout == 0 && + if (test_bit(RXRPC_CALL_IS_INTR, &call->flags) && + timeout == 0 && tx_win == tx_start && signal_pending(current)) return -EINTR; @@ -620,6 +621,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len) .call.tx_total_len = -1, .call.user_call_ID = 0, .call.nr_timeouts = 0, + .call.intr = true, .abort_code = 0, .command = RXRPC_CMD_SEND_DATA, .exclusive = false, |