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3c1a52f2a6
The namespace tree doesn't express the ownership concept of namespace appropriately. Maintain a list of directly owned namespaces per user namespace. This will allow userspace and the kernel to use the listns() system call to walk the namespace tree by owning user namespace. The rbtree is used to find the relevant namespace entry point which allows to continue iteration and the owner list can be used to walk the tree completely lock free. Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-16-2e6f823ebdc0@kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org> |
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