This adds inotify/ to the kselftests suite. It currently only includes a
test for the new inotify_update_watch(2) call, to make sure it actually
behaves like it should.
Signed-off-by: David Herrmann <dh.herrm...@gmail.com>
---
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/inotify/.gitignore | 2 +
tools/testing/selftests/inotify/Makefile | 14 ++++
tools/testing/selftests/inotify/test_inotify.c | 105 +++++++++++++++++++++++++
4 files changed, 122 insertions(+)
create mode 100644 tools/testing/selftests/inotify/.gitignore
create mode 100644 tools/testing/selftests/inotify/Makefile
create mode 100644 tools/testing/selftests/inotify/test_inotify.c
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 24ae9e8..9e9b9cf 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -5,6 +5,7 @@ TARGETS += exec
TARGETS += firmware
TARGETS += ftrace
TARGETS += futex
+TARGETS += inotify
TARGETS += kcmp
TARGETS += memfd
TARGETS += memory-hotplug
diff --git a/tools/testing/selftests/inotify/.gitignore
b/tools/testing/selftests/inotify/.gitignore
new file mode 100644
index 0000000..ab7299d
--- /dev/null
+++ b/tools/testing/selftests/inotify/.gitignore
@@ -0,0 +1,2 @@
+test_inotify
+test_file
diff --git a/tools/testing/selftests/inotify/Makefile
b/tools/testing/selftests/inotify/Makefile
new file mode 100644
index 0000000..c205abb
--- /dev/null
+++ b/tools/testing/selftests/inotify/Makefile
@@ -0,0 +1,14 @@
+CC = $(CROSS_COMPILE)gcc
+CFLAGS += -I../../../../include/uapi/
+CFLAGS += -I../../../../include/
+CFLAGS += -I../../../../usr/include/
+
+all:
+ $(CC) $(CFLAGS) test_inotify.c -o test_inotify
+
+TEST_PROGS := test_inotify
+
+include ../lib.mk
+
+clean:
+ $(RM) test_inotify test_file
diff --git a/tools/testing/selftests/inotify/test_inotify.c
b/tools/testing/selftests/inotify/test_inotify.c
new file mode 100644
index 0000000..094420a
--- /dev/null
+++ b/tools/testing/selftests/inotify/test_inotify.c
@@ -0,0 +1,105 @@
+/*
+ * inotify tests
+ */
+
+#define _GNU_SOURCE
+#define __EXPORTED_HEADERS__
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <linux/unistd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/inotify.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#define TEST_FILE "./test_file"
+
+static int sys_inotify_update_watch(int fd, uint32_t wd, uint32_t mask)
+{
+ return syscall(__NR_inotify_update_watch, fd, wd, mask);
+}
+
+static int read_inotify(int fd, struct inotify_event **out)
+{
+ union {
+ struct inotify_event event;
+ char buffer[sizeof(struct inotify_event) + NAME_MAX + 1];
+ } buf;
+ int r;
+
+ r = read(fd, &buf, sizeof(buf));
+ if (r < 0)
+ return r;
+
+ assert(r >= sizeof(struct inotify_event) && r <= sizeof(buf));
+ *out = &buf.event;
+ return r;
+}
+
+/* test inotify_update_watch(2) */
+static void test_update(void)
+{
+ struct inotify_event *event;
+ int ifd, wd, fd, r;
+
+ ifd = inotify_init1(IN_CLOEXEC | IN_NONBLOCK);
+ assert(ifd >= 0);
+
+ unlink(TEST_FILE);
+
+ /* try adding watch on non-existant file */
+ wd = inotify_add_watch(ifd, TEST_FILE, IN_IGNORED);
+ assert(wd < 0 && errno == ENOENT);
+
+ /* create file */
+ fd = open(TEST_FILE, O_CREAT | O_CLOEXEC | O_EXCL, S_IRUSR);
+ assert(fd >= 0);
+
+ /* add watch descriptor without IN_CLOSE */
+ wd = inotify_add_watch(ifd, TEST_FILE, IN_IGNORED);
+ assert(wd > 0);
+
+ /* close file */
+ close(fd);
+
+ /* should not have gotten any event */
+ r = read_inotify(ifd, &event);
+ assert(r < 0 && errno == EAGAIN);
+
+ /* reopen file */
+ fd = open(TEST_FILE, O_CLOEXEC | O_EXCL);
+ assert(fd >= 0);
+
+ /* invalid flags must result in EINVAL */
+ r = sys_inotify_update_watch(ifd, wd, -1);
+ assert(r < 0 && errno == EINVAL);
+
+ /* update watch descriptor with IN_CLOSE */
+ r = sys_inotify_update_watch(ifd, wd, IN_MASK_ADD | IN_CLOSE);
+ assert(r >= 0);
+
+ /* close file */
+ close(fd);
+
+ /* now we should have seen the event */
+ r = read_inotify(ifd, &event);
+ assert(r >= 0);
+ assert(event->wd == wd);
+ assert(event->mask & IN_CLOSE);
+
+ unlink(TEST_FILE);
+ close(ifd);
+}
+
+int main(int argc, char **argv)
+{
+ test_update();
+ return 0;
+}
--
2.5.1
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