summaryrefslogtreecommitdiffstats
path: root/tests/ebpf
diff options
context:
space:
mode:
Diffstat (limited to 'tests/ebpf')
-rw-r--r--tests/ebpf/README.md1
-rw-r--r--tests/ebpf/sync_tester.c120
2 files changed, 121 insertions, 0 deletions
diff --git a/tests/ebpf/README.md b/tests/ebpf/README.md
new file mode 100644
index 000000000..86e3dd87d
--- /dev/null
+++ b/tests/ebpf/README.md
@@ -0,0 +1 @@
+The file `sync_tester.c` can be used to fill all dimensions present in synchronization submenu.
diff --git a/tests/ebpf/sync_tester.c b/tests/ebpf/sync_tester.c
new file mode 100644
index 000000000..373c85c6d
--- /dev/null
+++ b/tests/ebpf/sync_tester.c
@@ -0,0 +1,120 @@
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#define _GNU_SOURCE /* See feature_test_macros(7) */
+#define __USE_GNU
+#include <fcntl.h>
+#include <unistd.h>
+
+void test_sync_file_range(char *output, char *text, size_t length)
+{
+ int fd = open (output, O_WRONLY | O_CREAT | O_APPEND, 0660);
+ if (fd < 0 ) {
+ perror("Cannot get page size");
+ return;
+ }
+
+ int i;
+ size_t offset = 0;
+ for ( i = 0 ; i < 10000; i++ ) {
+ write(fd, text, length);
+ sync_file_range(fd, offset, length, SYNC_FILE_RANGE_WRITE);
+ offset += length;
+ }
+
+ close(fd);
+ sleep(5);
+}
+
+// test based on IBM example https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_71/apis/msync.htm
+void test_msync(char *output, char *text, size_t length)
+{
+ int pagesize = sysconf(_SC_PAGE_SIZE);
+ if (pagesize < 0) {
+ perror("Cannot get page size");
+ return;
+ }
+
+ int fd = open(output, (O_CREAT | O_TRUNC | O_RDWR), (S_IRWXU | S_IRWXG | S_IRWXO));
+ if (fd < 0 ) {
+ perror("Cannot open file");
+ return;
+ }
+
+ off_t lastoffset = lseek( fd, pagesize, SEEK_SET);
+ ssize_t written = write(fd, " ", 1);
+ if ( written != 1 ) {
+ perror("Write error. ");
+ close(fd);
+ return;
+ }
+
+ off_t my_offset = 0;
+ void *address = mmap(NULL, pagesize, PROT_WRITE, MAP_SHARED, fd, my_offset);
+
+ if ( address == MAP_FAILED ) {
+ perror("Map error. ");
+ close(fd);
+ return;
+ }
+
+ (void) strcpy( (char*) address, text);
+
+ if ( msync( address, pagesize, MS_SYNC) < 0 ) {
+ perror("msync failed with error:");
+ }
+
+ close(fd);
+ sleep(5);
+}
+
+void test_synchronization(char *output, char *text, size_t length, int (*fcnt)(int))
+{
+ int fd = open (output, O_WRONLY | O_CREAT | O_APPEND, 0660);
+ if (fd < 0 ) {
+ perror("Cannot get page size");
+ return;
+ }
+
+ int i;
+ for ( i = 0 ; i < 10000; i++ )
+ write(fd, text, length);
+
+ fcnt(fd);
+ close(fd);
+
+ sleep(5);
+}
+
+void remove_files(char **files) {
+ size_t i = 0;
+ while (files[i]) {
+ unlink(files[i]);
+ i++;
+ }
+}
+
+int main()
+{
+ char *default_text = { "This is a simple example to test a PR. The sleep is used to create different peaks on charts.\n" };
+ char *files[] = { "fsync.txt", "fdatasync.txt", "syncfs.txt", "msync.txt", "sync_file_range.txt", NULL };
+ size_t length = strlen(default_text);
+ test_synchronization(files[0], default_text, length, fsync);
+ test_synchronization(files[1], default_text, length, fdatasync);
+ test_synchronization(files[2], default_text, length, syncfs);
+
+ test_msync(files[3], default_text, length);
+
+ test_sync_file_range(files[4], default_text, length);
+
+ sync();
+
+ remove_files(files);
+
+ return 0;
+}