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91 lines
1.8 KiB
91 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_UTSNAME_H |
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#define _LINUX_UTSNAME_H |
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#include <linux/sched.h> |
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#include <linux/nsproxy.h> |
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#include <linux/ns_common.h> |
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#include <linux/err.h> |
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#include <uapi/linux/utsname.h> |
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enum uts_proc { |
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UTS_PROC_OSTYPE, |
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UTS_PROC_OSRELEASE, |
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UTS_PROC_VERSION, |
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UTS_PROC_HOSTNAME, |
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UTS_PROC_DOMAINNAME, |
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}; |
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struct user_namespace; |
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extern struct user_namespace init_user_ns; |
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struct uts_namespace { |
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struct new_utsname name; |
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struct user_namespace *user_ns; |
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struct ucounts *ucounts; |
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struct ns_common ns; |
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} __randomize_layout; |
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extern struct uts_namespace init_uts_ns; |
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#ifdef CONFIG_UTS_NS |
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static inline void get_uts_ns(struct uts_namespace *ns) |
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{ |
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refcount_inc(&ns->ns.count); |
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} |
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extern struct uts_namespace *copy_utsname(unsigned long flags, |
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struct user_namespace *user_ns, struct uts_namespace *old_ns); |
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extern void free_uts_ns(struct uts_namespace *ns); |
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static inline void put_uts_ns(struct uts_namespace *ns) |
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{ |
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if (refcount_dec_and_test(&ns->ns.count)) |
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free_uts_ns(ns); |
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} |
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void uts_ns_init(void); |
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#else |
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static inline void get_uts_ns(struct uts_namespace *ns) |
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{ |
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} |
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static inline void put_uts_ns(struct uts_namespace *ns) |
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{ |
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} |
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static inline struct uts_namespace *copy_utsname(unsigned long flags, |
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struct user_namespace *user_ns, struct uts_namespace *old_ns) |
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{ |
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if (flags & CLONE_NEWUTS) |
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return ERR_PTR(-EINVAL); |
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return old_ns; |
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} |
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static inline void uts_ns_init(void) |
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{ |
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} |
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#endif |
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#ifdef CONFIG_PROC_SYSCTL |
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extern void uts_proc_notify(enum uts_proc proc); |
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#else |
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static inline void uts_proc_notify(enum uts_proc proc) |
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{ |
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} |
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#endif |
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static inline struct new_utsname *utsname(void) |
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{ |
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return ¤t->nsproxy->uts_ns->name; |
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} |
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static inline struct new_utsname *init_utsname(void) |
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{ |
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return &init_uts_ns.name; |
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} |
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extern struct rw_semaphore uts_sem; |
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#endif /* _LINUX_UTSNAME_H */
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