[LTP] [PATCH 1/3] Add ioctl_ficlone01 test

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

This test verifies that ioctl() FICLONE feature clones file content
from one file to an another.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 include/lapi/fs.h                                 |   4 +
 runtest/syscalls                                  |   2 +
 testcases/kernel/syscalls/ioctl/.gitignore        |   1 +
 testcases/kernel/syscalls/ioctl/ioctl_ficlone01.c | 116 ++++++++++++++++++++++
 4 files changed, 123 insertions(+)

diff --git a/include/lapi/fs.h b/include/lapi/fs.h
index 635979b02..cc3b7636c 100644
--- a/include/lapi/fs.h
+++ b/include/lapi/fs.h
@@ -48,6 +48,10 @@
 # define FS_VERITY_FL	   0x00100000 /* Verity protected inode */
 #endif
 
+#ifndef FICLONE
+# define FICLONE		_IOW(0x94, 9, int)
+#endif
+
 /*
  * Helper function to get MAX_LFS_FILESIZE.
  * Missing PAGE_SHIFT on some libc prevents defining MAX_LFS_FILESIZE.
diff --git a/runtest/syscalls b/runtest/syscalls
index cf06ee563..07e940f8c 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -591,6 +591,8 @@ ioctl_ns07 ioctl_ns07
 
 ioctl_sg01 ioctl_sg01
 
+ioctl_ficlone01 ioctl_ficlone01
+
 inotify_init1_01 inotify_init1_01
 inotify_init1_02 inotify_init1_02
 
diff --git a/testcases/kernel/syscalls/ioctl/.gitignore b/testcases/kernel/syscalls/ioctl/.gitignore
index 5fff7a61d..5404aa93f 100644
--- a/testcases/kernel/syscalls/ioctl/.gitignore
+++ b/testcases/kernel/syscalls/ioctl/.gitignore
@@ -22,3 +22,4 @@
 /ioctl_ns06
 /ioctl_ns07
 /ioctl_sg01
+/ioctl_ficlone01
diff --git a/testcases/kernel/syscalls/ioctl/ioctl_ficlone01.c b/testcases/kernel/syscalls/ioctl/ioctl_ficlone01.c
new file mode 100644
index 000000000..29c1eb848
--- /dev/null
+++ b/testcases/kernel/syscalls/ioctl/ioctl_ficlone01.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 Andrea Cervesato andrea.cervesato@suse.com
+ */
+
+/*\
+ * [Description]
+ *
+ * This test verifies that ioctl() FICLONE feature clones file content from
+ * one file to an another.
+ *
+ * [Algorithm]
+ *
+ * * populate source file
+ * * clone source content inside destination file
+ * * verify that source content has been cloned inside destination file
+ * * write a single byte inside destination file
+ * * verify that source content didn't change while destination did
+ */
+
+#include "tst_test.h"
+#include "lapi/fs.h"
+
+#define MNTPOINT "mnt"
+#define SRCPATH MNTPOINT "/file0"
+#define DSTPATH MNTPOINT "/file1"
+
+#define FILEDATA "qwerty"
+#define FILESIZE sizeof(FILEDATA)
+
+static int src_fd = -1;
+static int dst_fd = -1;
+
+static void run(void)
+{
+	char buff[FILESIZE];
+	struct stat src_stat;
+	struct stat dst_stat;
+
+	src_fd = SAFE_OPEN(SRCPATH, O_CREAT | O_RDWR, 0640);
+	dst_fd = SAFE_OPEN(DSTPATH, O_CREAT | O_RDWR, 0640);
+
+	tst_res(TINFO, "Writing data inside src file");
+
+	SAFE_WRITE(1, src_fd, FILEDATA, FILESIZE);
+	SAFE_FSYNC(src_fd);
+
+	TST_EXP_PASS(ioctl(dst_fd, FICLONE, src_fd));
+	if (TST_RET == -1)
+		return;
+
+	SAFE_FSYNC(dst_fd);
+
+	tst_res(TINFO, "Verifing that data is cloned between files");
+
+	SAFE_FSTAT(src_fd, &src_stat);
+	SAFE_FSTAT(dst_fd, &dst_stat);
+
+	TST_EXP_EXPR(src_stat.st_ino != dst_stat.st_ino,
+		"inode is different. %lu != %lu",
+		src_stat.st_ino,
+		dst_stat.st_ino);
+
+	TST_EXP_EQ_LI(src_stat.st_size, dst_stat.st_size);
+
+	SAFE_READ(0, dst_fd, buff, FILESIZE);
+
+	TST_EXP_EXPR(!strncmp(buff, FILEDATA, FILESIZE),
+		"dst file has the src file content (\"%s\" - %ld bytes)",
+		buff,
+		FILESIZE);
+
+	tst_res(TINFO, "Writing a byte inside dst file");
+
+	SAFE_WRITE(SAFE_WRITE_ALL, dst_fd, "a", 1);
+	SAFE_FSYNC(dst_fd);
+
+	tst_res(TINFO, "Verifing that src file content didn't change");
+
+	SAFE_FSTAT(src_fd, &src_stat);
+	SAFE_FSTAT(dst_fd, &dst_stat);
+
+	TST_EXP_EQ_LI(dst_stat.st_size, src_stat.st_size + 1);
+
+	SAFE_READ(0, src_fd, buff, FILESIZE);
+
+	TST_EXP_EXPR(!strncmp(buff, FILEDATA, FILESIZE),
+		"src file content didn't change");
+
+	SAFE_CLOSE(src_fd);
+	SAFE_CLOSE(dst_fd);
+	src_fd = -1;
+	dst_fd = -1;
+
+	remove(SRCPATH);
+	remove(DSTPATH);
+}
+
+static void cleanup(void)
+{
+	if (src_fd != -1)
+		SAFE_CLOSE(src_fd);
+
+	if (dst_fd != -1)
+		SAFE_CLOSE(dst_fd);
+}
+
+static struct tst_test test = {
+	.test_all = run,
+	.cleanup = cleanup,
+	.min_kver = "4.5",
+	.needs_root = 1,
+	.mount_device = 1,
+	.mntpoint = MNTPOINT,
+	.dev_fs_type = "btrfs",
+};

-- 
2.35.3