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authorKrishnan Parthasarathi <kparthas@redhat.com>2012-11-07 12:55:08 +0530
committerVijay Bellur <vbellur@redhat.com>2012-11-18 22:43:59 -0800
commitcfe51eb7ff5d5d61c1cf9ad1588c7a3e8250736b (patch)
tree4587f7ac8986c0d2b4384c260622f9e8bbefc33b /tests/bugs/getlk_owner.c
parent0f87154a4ba93fc042c4308a6f51a5b6582802ac (diff)
features/locks: fcntl(3) on F_GETLK must return first conflicting lock
- Added test program, getlk_owner.c to capture the bug when regressed. Change-Id: Ic2a0f6fa8d094c0f2e9f4a6febd278d4a2948223 BUG: 869724 Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-on: http://review.gluster.org/4164 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'tests/bugs/getlk_owner.c')
-rw-r--r--tests/bugs/getlk_owner.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/tests/bugs/getlk_owner.c b/tests/bugs/getlk_owner.c
new file mode 100644
index 00000000000..619c2e32d98
--- /dev/null
+++ b/tests/bugs/getlk_owner.c
@@ -0,0 +1,120 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+#define GETLK_OWNER_CHECK(f, cp, label) \
+ do { \
+ switch (f.l_type) { \
+ case F_RDLCK: \
+ case F_WRLCK: \
+ ret = 1; \
+ goto label; \
+ case F_UNLCK: \
+ if (!are_flocks_sane (&f, &cp)) { \
+ ret = 1; \
+ goto label; \
+ } \
+ break; \
+ } \
+ } while (0)
+
+void
+flock_init (struct flock *f, short int type, off_t start, off_t len)
+{
+ f->l_type = type;
+ f->l_start = start;
+ f->l_len = len;
+}
+
+int
+flock_cp (struct flock *dst, struct flock *src)
+{
+ memcpy ((void *) dst, (void *) src, sizeof (struct flock));
+}
+
+int
+are_flocks_sane (struct flock *src, struct flock *cpy)
+{
+ return ((src->l_whence == cpy->l_whence) &&
+ (src->l_start == cpy->l_start) &&
+ (src->l_len == cpy->l_len));
+}
+
+/*
+ * Test description:
+ * SETLK (0,3), F_WRLCK
+ * SETLK (3,3), F_WRLCK
+ *
+ * the following GETLK requests must return flock struct unmodified
+ * except for l_type to F_UNLCK
+ * GETLK (3,3), F_WRLCK
+ * GETLK (3,3), F_RDLCK
+ *
+ * */
+
+int main (int argc, char **argv)
+{
+ int fd = -1;
+ int ret = 1;
+ char *fname = NULL;
+ struct flock f = {0,};
+ struct flock cp = {0,};
+
+ if (argc < 2)
+ goto out;
+
+ fname = argv[1];
+ fd = open (fname, O_RDWR);
+ if (fd == -1) {
+ perror ("open");
+ goto out;
+ }
+
+ flock_init (&f, F_WRLCK, 0, 3);
+ flock_cp (&cp, &f);
+ ret = fcntl (fd, F_SETLK, &f);
+ if (ret) {
+ perror ("fcntl");
+ goto out;
+ }
+ if (!are_flocks_sane (&f, &cp)) {
+ ret = 1;
+ goto out;
+ }
+
+ flock_init (&f, F_WRLCK, 3, 3);
+ flock_cp (&cp, &f);
+ ret = fcntl (fd, F_SETLK, &f);
+ if (ret) {
+ perror ("fcntl");
+ goto out;
+ }
+ if (!are_flocks_sane (&f, &cp)) {
+ ret = 1;
+ goto out;
+ }
+
+ flock_init (&f, F_WRLCK, 3, 3);
+ flock_cp (&cp, &f);
+ ret = fcntl (fd, F_GETLK, &f);
+ if (ret) {
+ perror ("fcntl");
+ return 1;
+ }
+ GETLK_OWNER_CHECK (f, cp, out);
+
+ flock_init (&f, F_RDLCK, 3, 3);
+ flock_cp (&cp, &f);
+ ret = fcntl (fd, F_GETLK, &f);
+ if (ret) {
+ perror ("fcntl");
+ return 1;
+ }
+ GETLK_OWNER_CHECK (f, cp, out);
+
+out:
+ if (fd != -1)
+ close (fd);
+ return ret;
+}