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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2014
* Copyright (c) Linux Test Project, 2013-2023
*/
/*\
* [Description]
*
* Testcase copied from sendfile02.c to test the basic functionality of
* the sendfile() system call on large file. There is a kernel bug which
* introduced by commit 8f9c0119d7ba9 and fixed by commit 5d73320a96fcc.
*
* Only supports 64bit systems.
*
* [Algorithm]
*
* 1. Call sendfile() with offset at 0.
* 2. Call sendfile() with offset at 3GB.
*/
#include <inttypes.h>
#include <sys/sendfile.h>
#include "tst_test.h"
#define ONE_GB (INT64_C(1) << 30)
#define IN_FILE "in_file"
#define OUT_FILE "out_file"
static struct test_case_t {
char *desc;
off_t offset;
int64_t count;
int64_t exp_retval;
int64_t exp_updated_offset;
} tc[] = {
{ "offset at 0", 0, ONE_GB, ONE_GB, ONE_GB },
{ "offset at 3GB", 3 * ONE_GB, ONE_GB, ONE_GB, 4 * ONE_GB }
};
static void setup(void)
{
int i, fd;
if (!tst_fs_has_free(".", 5, TST_GB))
tst_brk(TCONF, "Test on large file needs 5G free space");
fd = SAFE_CREAT(IN_FILE, 00700);
for (i = 1; i <= (4 * 1024); ++i) {
SAFE_LSEEK(fd, 1024 * 1024 - 1, SEEK_CUR);
SAFE_WRITE(SAFE_WRITE_ALL, fd, "C", 1);
}
SAFE_CLOSE(fd);
fd = SAFE_CREAT(OUT_FILE, 00700);
SAFE_CLOSE(fd);
}
static void run(unsigned int i)
{
int in_fd = SAFE_OPEN(IN_FILE, O_RDONLY);
int out_fd = SAFE_OPEN(OUT_FILE, O_WRONLY);
off_t offset = tc[i].offset;
off_t before_pos, after_pos;
before_pos = SAFE_LSEEK(in_fd, 0, SEEK_CUR);
TEST(sendfile(out_fd, in_fd, &offset, tc[i].count));
after_pos = SAFE_LSEEK(in_fd, 0, SEEK_CUR);
if (TST_RET != tc[i].exp_retval)
tst_res(TFAIL, "sendfile() failed to return expected value, "
"expected: %" PRId64 ", got: %ld",
tc[i].exp_retval, TST_RET);
else if (offset != tc[i].exp_updated_offset)
tst_res(TFAIL, "sendfile() failed to update OFFSET parameter to "
"expected value, expected: %" PRId64 ", got: %" PRId64,
tc[i].exp_updated_offset, (int64_t)(offset));
else if (before_pos != after_pos)
tst_res(TFAIL, "sendfile() updated the file position of in_fd "
"unexpectedly, expected file position: %" PRId64
", actual file position %" PRId64,
(int64_t)(before_pos), (int64_t)(after_pos));
else
tst_res(TPASS, "sendfile() with %s", tc[i].desc);
SAFE_CLOSE(in_fd);
SAFE_CLOSE(out_fd);
}
static struct tst_test test = {
.needs_tmpdir = 1,
.setup = setup,
.test = run,
.tcnt = ARRAY_SIZE(tc),
.max_runtime = 120,
.skip_in_compat = 1,
.tags = (const struct tst_tag[]) {
{"linux-git", "5d73320a96fcc"},
{}
}
};
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