github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 15:12:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

selftests/open_tree: add OPEN_TREE_NAMESPACE tests

Browse Source 
Add tests for OPEN_TREE_NAMESPACE.

Link: https://patch.msgid.link/20251229-work-empty-namespace-v1-2-bfb24c7b061f@kernel.org
Tested-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-12-29 14:03:25 +01:00
parent 9b8a0ba682
commit b8f7622aa6
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
5 changed files with 1068 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/filesystems/open_tree_ns/.gitignore vendored Normal file
View File

@ -0,0 +1 @@
open_tree_ns_test

10
tools/testing/selftests/filesystems/open_tree_ns/Makefile Normal file
View File

@ -0,0 +1,10 @@
# SPDX-License-Identifier: GPL-2.0
TEST_GEN_PROGS := open_tree_ns_test
CFLAGS := -Wall -Werror -g $(KHDR_INCLUDES)
LDLIBS := -lcap
include ../../lib.mk
$(OUTPUT)/open_tree_ns_test: open_tree_ns_test.c ../utils.c
$(CC) $(CFLAGS) -o $@ $^ $(LDLIBS)

1030
tools/testing/selftests/filesystems/open_tree_ns/open_tree_ns_test.c Normal file
View File

File diff suppressed because it is too large Load Diff

26
tools/testing/selftests/filesystems/utils.c
View File

@ -515,6 +515,32 @@ int setup_userns(void)
return 0;
}
int enter_userns(void)
{
int ret;
char buf[32];
uid_t uid = getuid();
gid_t gid = getgid();
ret = unshare(CLONE_NEWUSER);
if (ret)
return ret;
sprintf(buf, "0 %d 1", uid);
ret = write_file("/proc/self/uid_map", buf);
if (ret)
return ret;
ret = write_file("/proc/self/setgroups", "deny");
if (ret)
return ret;
sprintf(buf, "0 %d 1", gid);
ret = write_file("/proc/self/gid_map", buf);
if (ret)
return ret;
return 0;
}
/* caps_down - lower all effective caps */
int caps_down(void)
{

1
tools/testing/selftests/filesystems/utils.h
View File

@ -28,6 +28,7 @@ extern int cap_down(cap_value_t down);
extern bool switch_ids(uid_t uid, gid_t gid);
extern int setup_userns(void);
extern int enter_userns(void);
static inline bool switch_userns(int fd, uid_t uid, gid_t gid, bool drop_caps)
{