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sysctl: Add a selftest for handling empty dirs

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Basic test to ensure that empty directories can be registered and that
they in turn can serve as a base dir for other registrations.

Add one test to the sysctl selftest module. It first registers an empty
directory under "empty_add" and then uses that as a base to register
another empty dir.
The sysctl bash script then checks that "empty_add" is present and that
there an empty directory within it.

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
This commit is contained in:
Joel Granados
2023-11-21 12:02:19 +01:00
committed by Luis Chamberlain
parent 315552310c
commit 777740779e
2 changed files with 52 additions and 0 deletions
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29
lib/test_sysctl.c
View File

@@ -35,6 +35,8 @@ static struct {
struct ctl_table_header *test_h_setup_node;
struct ctl_table_header *test_h_mnt;
struct ctl_table_header *test_h_mnterror;
struct ctl_table_header *empty_add;
struct ctl_table_header *empty;
} sysctl_test_headers;
struct test_sysctl_data {
@@ -220,6 +222,25 @@ static int test_sysctl_run_register_mount_point(void)
return 0;
}
static struct ctl_table test_table_empty[] = { };
static int test_sysctl_run_register_empty(void)
{
/* Tets that an empty dir can be created */
sysctl_test_headers.empty_add
= register_sysctl("debug/test_sysctl/empty_add", test_table_empty);
if (!sysctl_test_headers.empty_add)
return -ENOMEM;
/* Test that register on top of an empty dir works */
sysctl_test_headers.empty
= register_sysctl("debug/test_sysctl/empty_add/empty", test_table_empty);
if (!sysctl_test_headers.empty)
return -ENOMEM;
return 0;
}
static int __init test_sysctl_init(void)
{
int err;
@@ -233,6 +254,10 @@ static int __init test_sysctl_init(void)
goto out;
err = test_sysctl_run_register_mount_point();
if (err)
goto out;
err = test_sysctl_run_register_empty();
out:
return err;
@@ -248,6 +273,10 @@ static void __exit test_sysctl_exit(void)
unregister_sysctl_table(sysctl_test_headers.test_h_mnt);
if (sysctl_test_headers.test_h_mnterror)
unregister_sysctl_table(sysctl_test_headers.test_h_mnterror);
if (sysctl_test_headers.empty)
unregister_sysctl_table(sysctl_test_headers.empty);
if (sysctl_test_headers.empty_add)
unregister_sysctl_table(sysctl_test_headers.empty_add);
}
module_exit(test_sysctl_exit);