70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
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*/
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/*\
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* [Description]
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*
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* Fill the watch queue and wait for a notification loss.
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*/
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#define _GNU_SOURCE
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#include <unistd.h>
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#include "tst_test.h"
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#include "lapi/keyctl.h"
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#include "common.h"
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#define WATCH_QUEUE_NOTE_SIZE 128
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static int data_lost;
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static key_serial_t key;
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static int fd;
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static void saw_data_loss(struct watch_notification *n,
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LTP_ATTRIBUTE_UNUSED size_t len, unsigned int wtype)
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{
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if (wtype != WATCH_TYPE_META)
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return;
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if (n->subtype == WATCH_META_LOSS_NOTIFICATION)
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data_lost = 1;
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}
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static void setup(void)
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{
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fd = wqueue_watch(1, &wqueue_filter);
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key = wqueue_add_key(fd);
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}
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static void run(void)
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{
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int i, iterations;
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iterations = (getpagesize() / WATCH_QUEUE_NOTE_SIZE) * 2;
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for (i = 0; i < iterations; i++)
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keyctl(KEYCTL_UPDATE, key, "b", 1);
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data_lost = 0;
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while (!data_lost)
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wqueue_consumer(fd, saw_data_loss);
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if (data_lost)
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tst_res(TPASS, "Meta loss notification received");
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else
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tst_res(TFAIL, "Event not recognized");
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}
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static void cleanup(void)
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{
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keyctl(KEYCTL_REVOKE, key);
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.test_all = run,
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.setup = setup,
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.cleanup = cleanup,
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};
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