fe851cd555
The change in patches: 1. Fix cache issue when recreate file 2. Introduce CMAKE to build userspace apps 3. CleanCode Signed-off-by: Weifeng Su <suweifeng1@huawei.com>
55 lines
1.4 KiB
Diff
55 lines
1.4 KiB
Diff
From a79ba9896c37d30cd1901f7f54e0507adb9aabda Mon Sep 17 00:00:00 2001
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From: liqiang <liqiang64@huawei.com>
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Date: Mon, 12 Jun 2023 11:34:09 +0800
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Subject: engine running lock
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Signed-off-by: liqiang <liqiang64@huawei.com>
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---
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qtfs/qtfs_common/user_engine.c | 16 +++++++++++++++-
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1 file changed, 15 insertions(+), 1 deletion(-)
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diff --git a/qtfs/qtfs_common/user_engine.c b/qtfs/qtfs_common/user_engine.c
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index 919da11..7455413 100644
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--- a/qtfs/qtfs_common/user_engine.c
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+++ b/qtfs/qtfs_common/user_engine.c
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@@ -33,7 +33,7 @@
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#include <errno.h>
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#include <sys/resource.h>
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#include <sys/prctl.h>
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-
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+#include <sys/file.h>
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#include <sys/epoll.h>
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#include "comm.h"
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@@ -68,6 +68,16 @@ struct engine_arg {
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#define QTFS_USERP_SIZE QTFS_USERP_MAXSIZE
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#define QTFS_SERVER_FILE "/dev/qtfs_server"
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+#define ENGINE_LOCK_ADDR "/var/run/qtfs/engine.lock"
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+
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+int engine_socket_lock(void)
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+{
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+ int lock_fd = open(ENGINE_LOCK_ADDR, O_RDONLY | O_CREAT, 0600);
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+ if (lock_fd == -1)
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+ return -EINVAL;
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+
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+ return flock(lock_fd, LOCK_EX | LOCK_NB);
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+}
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int qtfs_fd;
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int engine_run = 1;
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@@ -365,6 +375,10 @@ int main(int argc, char *argv[])
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engine_out(" Example: %s 16 1 192.168.10.10 12121 192.168.10.11 12121.", argv[0]);
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return -1;
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}
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+ if (engine_socket_lock() < 0) {
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+ engine_err("Engine is running.");
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+ return -1;
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+ }
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if (qtfs_engine_env_check(argv) < 0) {
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engine_err("Environment check failed, engine exit.");
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return -1;
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--
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2.33.0
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