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author | Thanos Makatos <thanos.makatos@nutanix.com> | 2020-02-27 06:54:56 -0500 |
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committer | Thanos Makatos <thanos.makatos@nutanix.com> | 2020-02-28 06:30:23 -0500 |
commit | f77c1f3413a53e9a73cac4261a526ece0790a4e8 (patch) | |
tree | a25a11c0f982938c43288841c01065369e52c703 /samples/null.c | |
parent | 29868137a8469d5450cfa752b4fbb6ba4eae42d8 (diff) | |
download | libvfio-user-f77c1f3413a53e9a73cac4261a526ece0790a4e8.zip libvfio-user-f77c1f3413a53e9a73cac4261a526ece0790a4e8.tar.gz libvfio-user-f77c1f3413a53e9a73cac4261a526ece0790a4e8.tar.bz2 |
add sample to test #47
Signed-off-by: Thanos Makatos <thanos.makatos@nutanix.com>
Diffstat (limited to 'samples/null.c')
-rw-r--r-- | samples/null.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/samples/null.c b/samples/null.c new file mode 100644 index 0000000..db21953 --- /dev/null +++ b/samples/null.c @@ -0,0 +1,108 @@ +/* + * Userspace mediated device sample application + * + * Copyright (c) 2019, Nutanix Inc. All rights reserved. + * Author: Thanos Makatos <thanos@nutanix.com> + * Swapnil Ingle <swapnil.ingle@nutanix.com> + * Felipe Franciosi <felipe@nutanix.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Nutanix nor the names of its contributors may be + * used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + */ + +/* null PCI device, doesn't do anything */ + +#include <stdio.h> +#include <err.h> +#include <stdlib.h> +#include <pthread.h> +#include <errno.h> +#include <string.h> + +#include "../lib/muser.h" + +static void +null_log(void *pvt, char const *msg) +{ + fprintf(stderr, "%s", msg); +} + + +static void* null_drive(void *arg) +{ + lm_ctx_t *lm_ctx = (lm_ctx_t*)arg; + int ret = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL); + if (ret != 0) { + fprintf(stderr, "failed to enable cancel state: %s\n", strerror(ret)); + return NULL; + } + ret = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL); + if (ret != 0) { + fprintf(stderr, "failed to enable cancel type: %s\n", strerror(ret)); + return NULL; + } + printf("starting device emulation\n"); + lm_ctx_drive(lm_ctx); + return NULL; +} + +int main(int argc, char **argv) +{ + int ret; + pthread_t thread; + + if (argc != 2) { + err(EXIT_FAILURE, "missing MUSER device UUID"); + } + + lm_dev_info_t dev_info = {.uuid = argv[1], .log = null_log, .log_lvl = LM_DBG }; + + lm_ctx_t *lm_ctx = lm_ctx_create(&dev_info); + if (lm_ctx == NULL) { + err(EXIT_FAILURE, "failed to create libmuser context"); + } + + ret = pthread_create(&thread, NULL, null_drive, lm_ctx); + if (ret != 0) { + errno = ret; + err(EXIT_FAILURE, "failed to create pthread"); + } + + printf("press enter to stop device emulation and clean up\n"); + getchar(); + + ret = pthread_cancel(thread); + if (ret != 0) { + errno = ret; + err(EXIT_FAILURE, "failed to create pthread"); + } + lm_ctx_destroy(lm_ctx); + + printf("device emulation stopped and cleaned up, press enter to exit\n"); + getchar(); + + return ret; +} + +/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */ |