@@ -530,6 +530,7 @@ ioctl08 ioctl08
ioctl_loop01 ioctl_loop01
ioctl_loop02 ioctl_loop02
ioctl_loop03 ioctl_loop03
+ioctl_loop04 ioctl_loop04
ioctl_ns01 ioctl_ns01
ioctl_ns02 ioctl_ns02
@@ -9,6 +9,7 @@
/ioctl_loop01
/ioctl_loop02
/ioctl_loop03
+/ioctl_loop04
/ioctl_ns01
/ioctl_ns02
/ioctl_ns03
new file mode 100644
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
+ * Author: Yang Xu <xuyang2018.jy@cn.jujitsu.com>
+ *
+ * This is a basic ioctl test about loopdevice.
+ *
+ * It is designed to test LOOP_SET_CAPACITY can update a live
+ * loop device size when we change the size of the underlying
+ * backing file. Also check sys value.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "ioctl_loop_support.h"
+#include "lapi/loop.h"
+#include "tst_test.h"
+
+#define OLD_SIZE 10240
+#define NEW_SIZE 5120
+
+static char dev_path[1024], sys_loop_sizepath[1024];
+static char *wrbuf;
+static int dev_num, dev_fd, file_fd, attach_flag;
+
+static void verify_ioctl_loop(void)
+{
+ struct loop_info loopinfoget;
+
+ memset(&loopinfoget, 0, sizeof(loopinfoget));
+ tst_fill_file("test.img", 0, 1024, OLD_SIZE/1024);
+ tst_attach_device(dev_path, "test.img");
+ attach_flag = 1;
+
+ check_sys_value(sys_loop_sizepath, OLD_SIZE/512);
+ dev_fd = SAFE_OPEN(dev_path, O_RDWR);
+ file_fd = SAFE_OPEN("test.img", O_RDWR);
+ SAFE_IOCTL(dev_fd, LOOP_GET_STATUS, &loopinfoget);
+
+ if (loopinfoget.lo_flags & LO_FLAGS_READ_ONLY)
+ tst_brk(TCONF, "Current environment has unexpected LO_FLAGS_READ_ONLY flag");
+
+ SAFE_TRUNCATE("test.img", NEW_SIZE);
+ SAFE_IOCTL(dev_fd, LOOP_SET_CAPACITY);
+
+ /*check that we can't write data beyond 5K into loop device*/
+ TEST(write(dev_fd, wrbuf, OLD_SIZE));
+ if (TST_RET == NEW_SIZE) {
+ tst_res(TPASS, "LOOP_SET_CAPACITY has updated loop size(%d) to %d", OLD_SIZE, NEW_SIZE);
+ check_sys_value(sys_loop_sizepath, NEW_SIZE/512);
+ } else {
+ tst_res(TFAIL, "LOOP_SET_CAPACITY doesn't updated loop size to %d, its size is %ld",
+ NEW_SIZE, TST_RET);
+ }
+
+ SAFE_CLOSE(file_fd);
+ SAFE_CLOSE(dev_fd);
+ tst_detach_device(dev_path);
+ unlink("test.img");
+ attach_flag = 0;
+}
+
+static void setup(void)
+{
+ dev_num = tst_find_free_loopdev(dev_path, sizeof(dev_path));
+ if (dev_num < 0)
+ tst_brk(TBROK, "Failed to find free loop device");
+
+ wrbuf = SAFE_MALLOC(OLD_SIZE);
+ memset(wrbuf, 'x', OLD_SIZE);
+ sprintf(sys_loop_sizepath, "/sys/block/loop%d/size", dev_num);
+}
+
+static void cleanup(void)
+{
+ if (dev_fd > 0)
+ SAFE_CLOSE(dev_fd);
+ if (file_fd > 0)
+ SAFE_CLOSE(file_fd);
+ if (wrbuf)
+ free(wrbuf);
+ if (attach_flag)
+ tst_detach_device(dev_path);
+}
+
+static struct tst_test test = {
+ .setup = setup,
+ .cleanup = cleanup,
+ .test_all = verify_ioctl_loop,
+ .needs_root = 1,
+ .needs_tmpdir = 1,
+ .needs_drivers = (const char *const []) {
+ "loop",
+ NULL
+ }
+};
LOOP_SET_CAPACITY can update a live loop device size when we change the size of the underlying backing file. Also check sys value. Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com> --- runtest/syscalls | 1 + testcases/kernel/syscalls/ioctl/.gitignore | 1 + .../kernel/syscalls/ioctl/ioctl_loop04.c | 97 +++++++++++++++++++ 3 files changed, 99 insertions(+) create mode 100644 testcases/kernel/syscalls/ioctl/ioctl_loop04.c