Christian Brauner
e7585a9ef5
selftests/namespaces: tenth active reference count tests
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Test multiple children sharing same parent.
Parent should stay active as long as ANY child is active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-32-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:20 +01:00
Christian Brauner
a8ce47a1ac
selftests/namespaces: ninth active reference count tests
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Test multi-level hierarchy (3+ levels deep).
Grandparent → Parent → Child
When child is active, both parent AND grandparent should be active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-31-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
94f8711080
selftests/namespaces: eigth active reference count tests
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Test that bind mounts keep namespaces in the tree even when inactive
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-30-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
4b971b07e4
selftests/namespaces: seventh active reference count tests
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Test hierarchical active reference propagation.
When a child namespace is active, its owning user namespace should also
be active automatically due to hierarchical active reference propagation.
This ensures parents are always reachable when children are active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-29-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
47a5fd8ce1
selftests/namespaces: sixth active reference count tests
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Test that an open file descriptor keeps a namespace active.
Even after the creating process exits, the namespace should remain
active as long as an fd is held open.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-28-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
c4803b255f
selftests/namespaces: fifth active reference count tests
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Test PID namespace active ref tracking
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-27-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
28655ff253
selftests/namespaces: fourth active reference count tests
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Test user namespace active ref tracking via credential lifecycle.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-26-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
c6e25d930b
selftests/namespaces: third active reference count tests
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Test that a namespace remains active while a process is using it,
even after the creating process exits.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-25-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
721c7e41b1
selftests/namespaces: second active reference count tests
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Test namespace lifecycle: create a namespace in a child process, get a
file handle while it's active, then try to reopen after the process
exits (namespace becomes inactive).
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-24-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:19 +01:00
Christian Brauner
6bdce845fd
selftests/namespaces: first active reference count tests
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Test that initial namespaces can be reopened via file handle. Initial
namespaces should always have a ref count of one from boot.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-23-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-03 17:41:18 +01:00
Christian Brauner
d093090ea7
selftests/namespaces: verify initial namespace inode numbers
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Make sure that all works correctly.
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-09-19 16:22:38 +02:00
Christian Brauner
28ef38a9a2
selftests/namespaces: add file handle selftests
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Add a bunch of selftests for namespace file handles.
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-09-19 14:26:17 +02:00
Christian Brauner
14f98438f0
selftests/namespaces: add identifier selftests
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Add a bunch of selftests for the identifier retrieval ioctls.
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-09-19 14:26:16 +02:00
