Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_TIMENS_H#define _LINUX_TIMENS_H
#include <linux/sched.h>#include <linux/nsproxy.h>#include <linux/ns_common.h>#include <linux/err.h>#include <linux/time64.h>#include <linux/cleanup.h>
struct user_namespace;extern struct user_namespace init_user_ns;
struct seq_file;struct vm_area_struct;
struct timens_offsets { struct timespec64 monotonic; struct timespec64 boottime;};
struct time_namespace { struct user_namespace *user_ns; struct ucounts *ucounts; struct ns_common ns; struct timens_offsets offsets;#ifdef CONFIG_TIME_NS_VDSO struct page *vvar_page;#endif /* If set prevents changing offsets after any task joined namespace. */ bool frozen_offsets;} __randomize_layout;
extern struct time_namespace init_time_ns;
#ifdef CONFIG_TIME_NSstatic inline struct time_namespace *to_time_ns(struct ns_common *ns){ return container_of(ns, struct time_namespace, ns);}void __init time_ns_init(void);
static inline struct time_namespace *get_time_ns(struct time_namespace *ns){ ns_ref_inc(ns); return ns;}
struct time_namespace *copy_time_ns(u64 flags, struct user_namespace *user_ns, struct time_namespace *old_ns);void free_time_ns(struct time_namespace *ns);void timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk);
static inline void put_time_ns(struct time_namespace *ns){ if (ns_ref_put(ns)) free_time_ns(ns);}
void proc_timens_show_offsets(struct task_struct *p, struct seq_file *m);
struct proc_timens_offset { int clockid; struct timespec64 val;};
int proc_timens_set_offset(struct file *file, struct task_struct *p, struct proc_timens_offset *offsets, int n);
static inline void timens_add_monotonic(struct timespec64 *ts){ struct timens_offsets *ns_offsets = ¤t->nsproxy->time_ns->offsets;
*ts = timespec64_add(*ts, ns_offsets->monotonic);}
static inline void timens_add_boottime(struct timespec64 *ts){ struct timens_offsets *ns_offsets = ¤t->nsproxy->time_ns->offsets;
*ts = timespec64_add(*ts, ns_offsets->boottime);}
static inline u64 timens_add_boottime_ns(u64 nsec){ struct timens_offsets *ns_offsets = ¤t->nsproxy->time_ns->offsets;
return nsec + timespec64_to_ns(&ns_offsets->boottime);}
static inline void timens_sub_boottime(struct timespec64 *ts){ struct timens_offsets *ns_offsets = ¤t->nsproxy->time_ns->offsets;
*ts = timespec64_sub(*ts, ns_offsets->boottime);}
ktime_t do_timens_ktime_to_host(clockid_t clockid, ktime_t tim, struct timens_offsets *offsets);
static inline ktime_t timens_ktime_to_host(clockid_t clockid, ktime_t tim){ struct time_namespace *ns = current->nsproxy->time_ns;
if (likely(ns == &init_time_ns)) return tim;
return do_timens_ktime_to_host(clockid, tim, &ns->offsets);}
#elsestatic inline void __init time_ns_init(void){}
static inline struct time_namespace *get_time_ns(struct time_namespace *ns){ return NULL;}
static inline void put_time_ns(struct time_namespace *ns){}
static inlinestruct time_namespace *copy_time_ns(u64 flags, struct user_namespace *user_ns, struct time_namespace *old_ns){ if (flags & CLONE_NEWTIME) return ERR_PTR(-EINVAL);
return old_ns;}
static inline void timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk){ return;}
static inline void timens_add_monotonic(struct timespec64 *ts) { }static inline void timens_add_boottime(struct timespec64 *ts) { }
static inline u64 timens_add_boottime_ns(u64 nsec){ return nsec;}
static inline void timens_sub_boottime(struct timespec64 *ts) { }
static inline ktime_t timens_ktime_to_host(clockid_t clockid, ktime_t tim){ return tim;}#endif
#ifdef CONFIG_TIME_NS_VDSOextern void timens_commit(struct task_struct *tsk, struct time_namespace *ns);struct page *find_timens_vvar_page(struct vm_area_struct *vma);#else /* !CONFIG_TIME_NS_VDSO */static inline void timens_commit(struct task_struct *tsk, struct time_namespace *ns){}
static inline struct page *find_timens_vvar_page(struct vm_area_struct *vma){ return NULL;}#endif /* CONFIG_TIME_NS_VDSO */
DEFINE_FREE(time_ns, struct time_namespace *, if (_T) put_time_ns(_T))
#endif /* _LINUX_TIMENS_H */