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authorRaghavendra G <raghavendra@gluster.com>2012-11-20 12:30:13 +0530
committerVijay Bellur <vbellur@redhat.com>2012-11-27 22:45:02 -0800
commitdbc0968db04f09a57b3a2165803f8103c98c9acb (patch)
tree6badab3f4fcd73346e7d23bc008be12ec3ef8493 /tests/bugs/bug-808400-fcntl.c
parent228f0ea02b259b2a80edc9f92c2508635085f871 (diff)
mount/fuse: add test cases for lock migration
Change-Id: I1a48c63387c7803b36584070fd8f3684ccb696b1 BUG: 808400 Signed-off-by: Raghavendra G <raghavendra@gluster.com> Reviewed-on: http://review.gluster.org/4209 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'tests/bugs/bug-808400-fcntl.c')
-rw-r--r--tests/bugs/bug-808400-fcntl.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/tests/bugs/bug-808400-fcntl.c b/tests/bugs/bug-808400-fcntl.c
new file mode 100644
index 00000000000..36e6cf035eb
--- /dev/null
+++ b/tests/bugs/bug-808400-fcntl.c
@@ -0,0 +1,113 @@
+#include <sys/file.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+
+int
+run_child (char *filename)
+{
+ int fd = -1, ret = -1;
+ struct flock lock = {0, };
+ int ppid = 0;
+
+ fd = open (filename, O_RDWR);
+ if (fd < 0) {
+ fprintf (stderr, "open failed (%s)\n", strerror (errno));
+ goto out;
+ }
+
+ ppid = getppid ();
+
+ lock.l_type = F_WRLCK;
+ lock.l_whence = SEEK_SET;
+ lock.l_start = 0;
+ lock.l_len = 0;
+
+ ret = fcntl (fd, F_GETLK, &lock);
+ if (ret < 0) {
+ fprintf (stderr, "GETLK failed (%s)\n", strerror (errno));
+ goto out;
+ }
+
+ if ((lock.l_type == F_UNLCK) ||
+ (ppid != lock.l_pid)) {
+ fprintf (stderr, "no locks present, though parent has held "
+ "one\n");
+ ret = -1;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
+int
+main (int argc, char *argv[])
+{
+ int fd = -1, ret = -1, status = 0;
+ char *filename = NULL, *cmd = NULL;
+ struct stat stbuf = {0, };
+ struct flock lock = {0, };
+
+ if (argc != 3) {
+ fprintf (stderr, "Usage: %s <filename> "
+ "<gluster-cmd-to-trigger-graph-switch>\n", argv[0]);
+ goto out;
+ }
+
+ filename = argv[1];
+ cmd = argv[2];
+
+ fd = open (filename, O_RDWR | O_CREAT, 0);
+ if (fd < 0) {
+ fprintf (stderr, "open (%s) failed (%s)\n", filename,
+ strerror (errno));
+ goto out;
+ }
+
+ lock.l_type = F_WRLCK;
+ lock.l_whence = SEEK_SET;
+ lock.l_start = 0;
+ lock.l_len = 0;
+
+ ret = fcntl (fd, F_SETLK, &lock);
+ if (ret < 0) {
+ fprintf (stderr, "fcntl failed (%s)\n", strerror (errno));
+ goto out;
+ }
+
+ system (cmd);
+
+ /* wait till graph switch completes */
+ ret = fstat (fd, &stbuf);
+ if (ret < 0) {
+ fprintf (stderr, "fstat failure (%s)\n", strerror (errno));
+ goto out;
+ }
+
+ sleep (10);
+
+ /* By now old-graph would be disconnected and locks should be cleaned
+ * up if they are not migrated. Check that by trying to acquire a lock
+ * on a new fd opened by another process on same file.
+ */
+ ret = fork ();
+ if (ret == 0) {
+ ret = run_child (filename);
+ } else {
+ wait (&status);
+ if (WIFEXITED(status)) {
+ ret = WEXITSTATUS(status);
+ } else {
+ ret = 0;
+ }
+ }
+
+out:
+ return ret;
+}