diff options
| author | David Howells <dhowells@redhat.com> | 2020-01-14 17:07:11 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-02-12 14:28:21 +0000 |
| commit | b67bb04fd27ad8a16f0b9c94511d528dc50c9560 (patch) | |
| tree | 890cd518489827d878d8fa79c41e2e29e7fbaa3e /samples | |
| parent | 631ec151fd964bfccddec9d91366451dface6dfe (diff) | |
| download | linux-next-b67bb04fd27ad8a16f0b9c94511d528dc50c9560.tar.gz | |
pipe: Allow buffers to be marked read-whole-or-error for notifications
Allow a buffer to be marked such that read() must return the entire buffer
in one go or return ENOBUFS. Multiple buffers can be amalgamated into a
single read, but a short read will occur if the next "whole" buffer won't
fit.
This is useful for watch queue notifications to make sure we don't split a
notification across multiple reads, especially given that we need to
fabricate an overrun record under some circumstances - and that isn't in
the buffers.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/watch_queue/watch_test.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/samples/watch_queue/watch_test.c b/samples/watch_queue/watch_test.c index 9bf60abf5c7e..924e13a49c37 100644 --- a/samples/watch_queue/watch_test.c +++ b/samples/watch_queue/watch_test.c @@ -63,7 +63,7 @@ static void saw_key_change(struct watch_notification *n, size_t len) */ static void consumer(int fd) { - unsigned char buffer[4096], *p, *end; + unsigned char buffer[433], *p, *end; union { struct watch_notification n; unsigned char buf1[128]; |