Unverified Commit b8f7622a authored by Christian Brauner's avatar Christian Brauner
Browse files

selftests/open_tree: add OPEN_TREE_NAMESPACE tests 

Add tests for OPEN_TREE_NAMESPACE.

Link: https://patch.msgid.link/20251229-work-empty-namespace-v1-2-bfb24c7b061f@kernel.org


Tested-by: default avatarJeff Layton <jlayton@kernel.org>
Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 9b8a0ba6

tools/testing/selftests/filesystems/open_tree_ns/.gitignore

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open_tree_ns_test

tools/testing/selftests/filesystems/open_tree_ns/Makefile

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# 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)

tools/testing/selftests/filesystems/open_tree_ns/open_tree_ns_test.c

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File added.

Preview size limit exceeded, changes collapsed.

tools/testing/selftests/filesystems/utils.c

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@@ -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)

{

tools/testing/selftests/filesystems/utils.h

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@@ -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)

{