Snap for 11666499 from cdb9cd95d819b7d394f63db8dd87804de5aa3e69 to android14-tests-releaseandroid-vts-14.0_r4android-cts-14.0_r4android14-tests-release

Change-Id: I85b19974289ff82a6568e1771c64365c6c34b37c

1 files changed, 131 insertions, 0 deletions

diff --git a/testcases/kernel/syscalls/process_madvise/process_madvise01.c b/testcases/kernel/syscalls/process_madvise/process_madvise01.c
new file mode 100644
index 000000000..0fd3c1ef4
--- /dev/null
+++ b/testcases/kernel/syscalls/process_madvise/process_madvise01.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Allocate anonymous memory pages inside child and reclaim it with
+ * MADV_PAGEOUT. Then check if memory pages have been swapped out by looking
+ * at smaps information.
+ *
+ * The advice might be ignored for some pages in the range when it is
+ * not applicable, so test passes if swap memory increases after
+ * reclaiming memory with MADV_PAGEOUT.
+ */
+
+#define _GNU_SOURCE
+
+#include <sys/mman.h>
+#include "tst_test.h"
+#include "lapi/mmap.h"
+#include "lapi/syscalls.h"
+#include "process_madvise.h"
+
+#define MEM_CHILD	(1 * TST_MB)
+
+static void **data_ptr;
+
+static void child_alloc(void)
+{
+	char data[MEM_CHILD];
+	struct addr_mapping map_before;
+	struct addr_mapping map_after;
+
+	memset(data, 'a', MEM_CHILD);
+
+	tst_res(TINFO, "Allocate memory: %d bytes", MEM_CHILD);
+
+	*data_ptr = SAFE_MMAP(NULL, MEM_CHILD,
+			PROT_READ | PROT_WRITE,
+			MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+
+	memset(*data_ptr, 'a', MEM_CHILD);
+
+	memset(&map_before, 0, sizeof(struct addr_mapping));
+	read_address_mapping((unsigned long)*data_ptr, &map_before);
+
+	TST_CHECKPOINT_WAKE_AND_WAIT(0);
+
+	memset(&map_after, 0, sizeof(struct addr_mapping));
+	read_address_mapping((unsigned long)*data_ptr, &map_after);
+
+	if (memcmp(*data_ptr, data, MEM_CHILD) != 0) {
+		tst_res(TFAIL, "Dirty memory after reclaiming it");
+		return;
+	}
+
+	SAFE_MUNMAP(*data_ptr, MEM_CHILD);
+	*data_ptr = NULL;
+
+	TST_EXP_EXPR(map_before.swap < map_after.swap,
+		"Most of the memory has been swapped out: %dkB out of %dkB",
+		map_after.swap - map_before.swap,
+		MEM_CHILD / TST_KB);
+}
+
+static void setup(void)
+{
+	data_ptr = SAFE_MMAP(NULL, sizeof(void *),
+			PROT_READ | PROT_WRITE,
+			MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+}
+
+static void cleanup(void)
+{
+	if (*data_ptr)
+		SAFE_MUNMAP(*data_ptr, MEM_CHILD);
+
+	if (data_ptr)
+		SAFE_MUNMAP(data_ptr, sizeof(void *));
+}
+
+static void run(void)
+{
+	int ret;
+	int pidfd;
+	pid_t pid_alloc;
+	struct iovec vec;
+
+	pid_alloc = SAFE_FORK();
+	if (!pid_alloc) {
+		child_alloc();
+		return;
+	}
+
+	TST_CHECKPOINT_WAIT(0);
+
+	tst_res(TINFO, "Reclaim memory using MADV_PAGEOUT");
+
+	pidfd = SAFE_PIDFD_OPEN(pid_alloc, 0);
+
+	vec.iov_base = *data_ptr;
+	vec.iov_len = MEM_CHILD;
+
+	ret = tst_syscall(__NR_process_madvise, pidfd, &vec, 1UL,
+			MADV_PAGEOUT, 0UL);
+
+	if (ret == -1)
+		tst_brk(TBROK | TERRNO, "process_madvise failed");
+
+	if (ret != MEM_CHILD)
+		tst_brk(TBROK, "process_madvise reclaimed only %d bytes", ret);
+
+	TST_CHECKPOINT_WAKE(0);
+}
+
+static struct tst_test test = {
+	.setup = setup,
+	.cleanup = cleanup,
+	.test_all = run,
+	.forks_child = 1,
+	.min_kver = "5.10",
+	.needs_checkpoints = 1,
+	.needs_root = 1,
+	.min_swap_avail = MEM_CHILD / TST_MB,
+	.needs_kconfigs = (const char *[]) {
+		"CONFIG_SWAP=y",
+		NULL
+	},
+};