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test-copy: test with different max_bytes values

This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-03-15 13:55:50 -04:00
parent 00a8cf7763
commit 7a827fcb11
1 changed files with 25 additions and 10 deletions
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35
src/test/test-copy.c
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@ -180,14 +180,14 @@ static void test_copy_bytes(void) {
assert_se(r == -EBADF);
}
static void test_copy_bytes_regular_file(const char *src, bool try_reflink) {
static void test_copy_bytes_regular_file(const char *src, bool try_reflink, size_t max_bytes) {
char fn2[] = "/tmp/test-copy-file-XXXXXX";
char fn3[] = "/tmp/test-copy-file-XXXXXX";
_cleanup_close_ int fd = -1, fd2 = -1, fd3 = -1;
int r;
struct stat buf, buf2, buf3;
log_info("%s try_reflink=%s", __func__, yes_no(try_reflink));
log_info("%s try_reflink=%s max_bytes=%zu", __func__, yes_no(try_reflink), max_bytes);
fd = open(src, O_RDONLY | O_CLOEXEC | O_NOCTTY);
assert_se(fd >= 0);
@ -198,20 +198,31 @@ static void test_copy_bytes_regular_file(const char *src, bool try_reflink) {
fd3 = mkostemp_safe(fn3, O_WRONLY);
assert_se(fd3 >= 0);
r = copy_bytes(fd, fd2, (uint64_t) -1, try_reflink);
assert_se(r == 0);
r = copy_bytes(fd, fd2, max_bytes, try_reflink);
if (max_bytes == (uint64_t) -1)
assert_se(r == 0);
else
assert_se(IN_SET(r, 0, 1));
assert_se(lseek(fd2, 0, SEEK_SET) == 0);
r = copy_bytes(fd2, fd3, (uint64_t) -1, try_reflink);
assert_se(r == 0);
r = copy_bytes(fd2, fd3, max_bytes, try_reflink);
if (max_bytes == (uint64_t) -1)
assert_se(r == 0);
else
/* We cannot distinguish between the input being exactly max_bytes
* or longer than max_bytes (without trying to read one more byte,
* or calling stat, or FION_READ, etc, and we don't want to do any
* of that). So we expect "truncation" since we know that file we
* are copying is exactly max_bytes bytes. */
assert_se(r == 1);
assert_se(fstat(fd, &buf) == 0);
assert_se(fstat(fd2, &buf2) == 0);
assert_se(fstat(fd3, &buf3) == 0);
assert_se(buf.st_size == buf2.st_size);
assert_se(buf.st_size == buf3.st_size);
assert_se((size_t) buf2.st_size == MIN((size_t) buf.st_size, max_bytes));
assert_se(buf3.st_size == buf2.st_size);
unlink(fn2);
unlink(fn3);
@ -222,8 +233,12 @@ int main(int argc, char *argv[]) {
test_copy_file_fd();
test_copy_tree();
test_copy_bytes();
test_copy_bytes_regular_file(argv[0], false);
test_copy_bytes_regular_file(argv[0], true);
test_copy_bytes_regular_file(argv[0], false, (uint64_t) -1);
test_copy_bytes_regular_file(argv[0], true, (uint64_t) -1);
test_copy_bytes_regular_file(argv[0], false, 1000); /* smaller than copy buffer size */
test_copy_bytes_regular_file(argv[0], true, 1000);
test_copy_bytes_regular_file(argv[0], false, 32000); /* larger than copy buffer size */
test_copy_bytes_regular_file(argv[0], true, 32000);
return 0;
}