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-rw-r--r--qa/btrfs/test_async_snap.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/qa/btrfs/test_async_snap.c b/qa/btrfs/test_async_snap.c
new file mode 100644
index 00000000..211be95a
--- /dev/null
+++ b/qa/btrfs/test_async_snap.c
@@ -0,0 +1,83 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <string.h>
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+#include "../../src/os/btrfs_ioctl.h"
+
+struct btrfs_ioctl_vol_args_v2 va;
+struct btrfs_ioctl_vol_args vold;
+int max = 4;
+
+void check_return(int r)
+{
+ if (r < 0) {
+ printf("********* failed with %d %s ********\n", errno, strerror(errno));
+ exit(1);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ int num = 1000;
+
+ if (argc > 1)
+ num = atoi(argv[1]);
+ printf("will do %d iterations\n", num);
+
+ int cwd = open(".", O_RDONLY);
+ printf("cwd = %d\n", cwd);
+ while (num-- > 0) {
+ if (rand() % 10 == 0) {
+ __u64 transid;
+ int r;
+ printf("sync starting\n");
+ r = ioctl(cwd, BTRFS_IOC_START_SYNC, &transid);
+ check_return(r);
+ printf("sync started, transid %lld, waiting\n", transid);
+ r = ioctl(cwd, BTRFS_IOC_WAIT_SYNC, &transid);
+ check_return(r);
+ printf("sync finished\n");
+ }
+
+ int i = rand() % max;
+ struct stat st;
+ va.fd = cwd;
+ sprintf(va.name, "test.%d", i);
+ va.transid = 0;
+ int r = stat(va.name, &st);
+ if (r < 0) {
+ if (rand() % 3 == 0) {
+ printf("snap create (sync) %s\n", va.name);
+ va.flags = 0;
+ r = ioctl(cwd, BTRFS_IOC_SNAP_CREATE_V2, &va);
+ check_return(r);
+ } else {
+ printf("snap create (async) %s\n", va.name);
+ va.flags = BTRFS_SUBVOL_CREATE_ASYNC;
+ r = ioctl(cwd, BTRFS_IOC_SNAP_CREATE_V2, &va);
+ check_return(r);
+ printf("snap created, transid %lld\n", va.transid);
+ if (rand() % 2 == 0) {
+ printf("waiting for async snap create\n");
+ r = ioctl(cwd, BTRFS_IOC_WAIT_SYNC, &va.transid);
+ check_return(r);
+ }
+ }
+ } else {
+ printf("snap remove %s\n", va.name);
+ vold.fd = va.fd;
+ strcpy(vold.name, va.name);
+ r = ioctl(cwd, BTRFS_IOC_SNAP_DESTROY, &vold);
+ check_return(r);
+ }
+ }
+ return 0;
+}