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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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ea1549e628
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>
88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2025 Christian Brauner <brauner@kernel.org> */
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#ifndef _LINUX_NSTREE_H
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#define _LINUX_NSTREE_H
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#include <linux/nsproxy.h>
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#include <linux/rbtree.h>
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#include <linux/seqlock.h>
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#include <linux/rculist.h>
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#include <linux/cookie.h>
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#include <uapi/linux/nsfs.h>
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struct ns_common;
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extern struct ns_tree cgroup_ns_tree;
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extern struct ns_tree ipc_ns_tree;
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extern struct ns_tree mnt_ns_tree;
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extern struct ns_tree net_ns_tree;
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extern struct ns_tree pid_ns_tree;
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extern struct ns_tree time_ns_tree;
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extern struct ns_tree user_ns_tree;
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extern struct ns_tree uts_ns_tree;
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#define to_ns_tree(__ns) \
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_Generic((__ns), \
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struct cgroup_namespace *: &(cgroup_ns_tree), \
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struct ipc_namespace *: &(ipc_ns_tree), \
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struct net *: &(net_ns_tree), \
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struct pid_namespace *: &(pid_ns_tree), \
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struct mnt_namespace *: &(mnt_ns_tree), \
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struct time_namespace *: &(time_ns_tree), \
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struct user_namespace *: &(user_ns_tree), \
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struct uts_namespace *: &(uts_ns_tree))
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#define ns_tree_gen_id(__ns) \
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__ns_tree_gen_id(to_ns_common(__ns), \
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(((__ns) == ns_init_ns(__ns)) ? ns_init_id(__ns) : 0))
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u64 __ns_tree_gen_id(struct ns_common *ns, u64 id);
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void __ns_tree_add_raw(struct ns_common *ns, struct ns_tree *ns_tree);
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void __ns_tree_remove(struct ns_common *ns, struct ns_tree *ns_tree);
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struct ns_common *ns_tree_lookup_rcu(u64 ns_id, int ns_type);
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struct ns_common *__ns_tree_adjoined_rcu(struct ns_common *ns,
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struct ns_tree *ns_tree,
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bool previous);
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static inline void __ns_tree_add(struct ns_common *ns, struct ns_tree *ns_tree, u64 id)
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{
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__ns_tree_gen_id(ns, id);
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__ns_tree_add_raw(ns, ns_tree);
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}
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/**
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* ns_tree_add_raw - Add a namespace to a namespace
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* @ns: Namespace to add
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*
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* This function adds a namespace to the appropriate namespace tree
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* without assigning a id.
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*/
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#define ns_tree_add_raw(__ns) __ns_tree_add_raw(to_ns_common(__ns), to_ns_tree(__ns))
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/**
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* ns_tree_add - Add a namespace to a namespace tree
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* @ns: Namespace to add
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*
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* This function assigns a new id to the namespace and adds it to the
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* appropriate namespace tree and list.
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*/
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#define ns_tree_add(__ns) \
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__ns_tree_add(to_ns_common(__ns), to_ns_tree(__ns), \
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(((__ns) == ns_init_ns(__ns)) ? ns_init_id(__ns) : 0))
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/**
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* ns_tree_remove - Remove a namespace from a namespace tree
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* @ns: Namespace to remove
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*
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* This function removes a namespace from the appropriate namespace
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* tree and list.
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*/
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#define ns_tree_remove(__ns) __ns_tree_remove(to_ns_common(__ns), to_ns_tree(__ns))
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#define ns_tree_adjoined_rcu(__ns, __previous) \
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__ns_tree_adjoined_rcu(to_ns_common(__ns), to_ns_tree(__ns), __previous)
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#define ns_tree_active(__ns) (!RB_EMPTY_NODE(&to_ns_common(__ns)->ns_tree_node))
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#endif /* _LINUX_NSTREE_H */
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