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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>
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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>
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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>
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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>
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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>
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Make sure that all works correctly.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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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>
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Add a bunch of selftests for the identifier retrieval ioctls.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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