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// SPDX-License-Identifier: GPL-2.0-only
#include <kunit/test.h>
#include <linux/fdtable.h>
#include <linux/file.h>
static void test_alloc_fdtable(struct kunit *test)
{
struct fdtable *fdt;
unsigned int slots = 64;
fdt = alloc_fdtable(slots);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fdt);
/* Check that max_fds is set correctly and is >= slots */
KUNIT_EXPECT_GE(test, fdt->max_fds, slots);
/* Check that fd is allocated */
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fdt->fd);
/*
* Check dynamic object size of fdt->fd if compiler supports
* __counted_by_ptr.
*/
#ifdef CONFIG_CC_HAS_COUNTED_BY_PTR
KUNIT_EXPECT_EQ(test, __struct_size(fdt->fd),
fdt->max_fds * sizeof(struct file *));
#endif
__free_fdtable(fdt);
}
static void test_dup_fd(struct kunit *test)
{
struct files_struct *newf;
struct fdtable *fdt;
newf = dup_fd(&init_files, NULL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, newf);
fdt = rcu_dereference_raw(newf->fdt);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fdt);
/* Check that max_fds is set correctly and is >= NR_OPEN_DEFAULT */
KUNIT_EXPECT_GE(test, fdt->max_fds, NR_OPEN_DEFAULT);
/* Check that fd is allocated */
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fdt->fd);
/*
* Check dynamic object size of fdt->fd if compiler supports
* __counted_by_ptr.
*/
#ifdef CONFIG_CC_HAS_COUNTED_BY_PTR
KUNIT_EXPECT_EQ(test, __struct_size(fdt->fd),
fdt->max_fds * sizeof(struct file *));
#endif
put_files_struct(newf);
}
static struct kunit_case fdtable_test_cases[] = {
KUNIT_CASE(test_alloc_fdtable),
KUNIT_CASE(test_dup_fd),
{}
};
static struct kunit_suite fdtable_test_suite = {
.name = "fdtable",
.test_cases = fdtable_test_cases,
};
kunit_test_suite(fdtable_test_suite);
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