Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
uts: support ns lookup
Support the generic ns lookup infrastructure to support file handles for
namespaces.
Signed-off-by: Christian Brauner <brauner@kernel.org>
+6
-1
+6
-1
kernel/utsname.c
+6
-1
kernel/utsname.c
···
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13
#include <linux/cred.h>
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#include <linux/user_namespace.h>
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#include <linux/proc_ns.h>
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+
#include <linux/nstree.h>
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#include <linux/sched/task.h>
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static struct kmem_cache *uts_ns_cache __ro_after_init;
···
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memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
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ns->user_ns = get_user_ns(user_ns);
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up_read(&uts_sem);
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+
ns_tree_add(ns);
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return ns;
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fail_free:
···
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void free_uts_ns(struct uts_namespace *ns)
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{
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+
ns_tree_remove(ns);
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dec_uts_namespaces(ns->ucounts);
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put_user_ns(ns->user_ns);
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ns_free_inum(&ns->ns);
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-
kmem_cache_free(uts_ns_cache, ns);
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+
/* Concurrent nstree traversal depends on a grace period. */
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+
kfree_rcu(ns, ns.ns_rcu);
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}
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static inline struct uts_namespace *to_uts_ns(struct ns_common *ns)
···
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offsetof(struct uts_namespace, name),
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sizeof_field(struct uts_namespace, name),
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NULL);
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+
ns_tree_add(&init_uts_ns);
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}