Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

selftests/namespaces: second listns() test 

test listns() with type filtering.
List only network namespaces.

Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-40-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-10-29 13:20:53 +01:00
parent e2ff8d8864
commit 6a68c7f919
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 61 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
tools/testing/selftests/namespaces/listns_test.c
View File

@ -54,4 +54,65 @@ TEST(listns_basic_unified)
} }
} }
/*
* Test listns() with type filtering.
* List only network namespaces.
*/
TEST(listns_filter_by_type)
{
struct ns_id_req req = {
.size = sizeof(req),
.spare = 0,
.ns_id = 0,
.ns_type = CLONE_NEWNET, /* Only network namespaces */
.spare2 = 0,
.user_ns_id = 0,
};
__u64 ns_ids[100];
ssize_t ret;
ret = sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0);
if (ret < 0) {
if (errno == ENOSYS)
SKIP(return, "listns() not supported");
TH_LOG("listns failed: %s (errno=%d)", strerror(errno), errno);
ASSERT_TRUE(false);
}
ASSERT_GE(ret, 0);
/* Should find at least init_net */
ASSERT_GT(ret, 0);
TH_LOG("Found %zd active network namespaces", ret);
/* Verify we can open each namespace and it's actually a network namespace */
for (ssize_t i = 0; i < ret && i < 5; i++) {
struct nsfs_file_handle nsfh = {
.ns_id = ns_ids[i],
.ns_type = CLONE_NEWNET,
.ns_inum = 0,
};
struct file_handle *fh;
int fd;
fh = (struct file_handle *)malloc(sizeof(*fh) + sizeof(nsfh));
ASSERT_NE(fh, NULL);
fh->handle_bytes = sizeof(nsfh);
fh->handle_type = 0;
memcpy(fh->f_handle, &nsfh, sizeof(nsfh));
fd = open_by_handle_at(-10003, fh, O_RDONLY);
free(fh);
if (fd >= 0) {
int ns_type;
/* Verify it's a network namespace via ioctl */
ns_type = ioctl(fd, NS_GET_NSTYPE);
if (ns_type >= 0) {
ASSERT_EQ(ns_type, CLONE_NEWNET);
}
close(fd);
}
}
}
TEST_HARNESS_MAIN TEST_HARNESS_MAIN