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Switch the nstree management to the new combined structures.
Link: https://patch.msgid.link/20251110-work-namespace-nstree-fixes-v1-5-e8a9264e0fb9@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Add helpers that work on the combined rbtree and rculist combined.
This will make the code a lot more managable and legible.
Link: https://patch.msgid.link/20251110-work-namespace-nstree-fixes-v1-4-e8a9264e0fb9@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Introduce two new fundamental data structures for namespace tree
management in a separate header file.
Link: https://patch.msgid.link/20251110-work-namespace-nstree-fixes-v1-3-e8a9264e0fb9@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Foward declare struct ns_common and remove the include of ns_common.h.
We want ns_common.h to possibly include nstree structures but not the
other way around.
Link: https://patch.msgid.link/20251110-work-namespace-nstree-fixes-v1-2-e8a9264e0fb9@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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The initial set of namespace comes with fixed inode numbers making it
easy for userspace to identify them solely based on that information.
This has long preceeded anything here.
Similarly, let's assign fixed namespace ids for the initial namespaces.
Kill the cookie and use a sequentially increasing number. This has the
nice side-effect that the owning user namespace will always have a
namespace id that is smaller than any of it's descendant namespaces.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-15-2e6f823ebdc0@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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I authored the files a short while ago.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Don't expose it directly. There's no need to do that.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Move the namespace iteration infrastructure originally introduced for
mount namespaces into a generic library usable by all namespace types.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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