mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 02:35:29 +07:00
f1ecf06854
Adding support for poll() in sysctl fs allows userspace to receive notifications of changes in sysctl entries. This adds a infrastructure to allow files in sysctl fs to be pollable and implements it for hostname and domainname. [akpm@linux-foundation.org: s/declare/define/ for definitions] Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi> Cc: Greg KH <gregkh@suse.de> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
114 lines
2.1 KiB
C
114 lines
2.1 KiB
C
#ifndef _LINUX_UTSNAME_H
|
|
#define _LINUX_UTSNAME_H
|
|
|
|
#define __OLD_UTS_LEN 8
|
|
|
|
struct oldold_utsname {
|
|
char sysname[9];
|
|
char nodename[9];
|
|
char release[9];
|
|
char version[9];
|
|
char machine[9];
|
|
};
|
|
|
|
#define __NEW_UTS_LEN 64
|
|
|
|
struct old_utsname {
|
|
char sysname[65];
|
|
char nodename[65];
|
|
char release[65];
|
|
char version[65];
|
|
char machine[65];
|
|
};
|
|
|
|
struct new_utsname {
|
|
char sysname[__NEW_UTS_LEN + 1];
|
|
char nodename[__NEW_UTS_LEN + 1];
|
|
char release[__NEW_UTS_LEN + 1];
|
|
char version[__NEW_UTS_LEN + 1];
|
|
char machine[__NEW_UTS_LEN + 1];
|
|
char domainname[__NEW_UTS_LEN + 1];
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/nsproxy.h>
|
|
#include <linux/err.h>
|
|
|
|
enum uts_proc {
|
|
UTS_PROC_OSTYPE,
|
|
UTS_PROC_OSRELEASE,
|
|
UTS_PROC_VERSION,
|
|
UTS_PROC_HOSTNAME,
|
|
UTS_PROC_DOMAINNAME,
|
|
};
|
|
|
|
struct user_namespace;
|
|
extern struct user_namespace init_user_ns;
|
|
|
|
struct uts_namespace {
|
|
struct kref kref;
|
|
struct new_utsname name;
|
|
struct user_namespace *user_ns;
|
|
};
|
|
extern struct uts_namespace init_uts_ns;
|
|
|
|
#ifdef CONFIG_UTS_NS
|
|
static inline void get_uts_ns(struct uts_namespace *ns)
|
|
{
|
|
kref_get(&ns->kref);
|
|
}
|
|
|
|
extern struct uts_namespace *copy_utsname(unsigned long flags,
|
|
struct task_struct *tsk);
|
|
extern void free_uts_ns(struct kref *kref);
|
|
|
|
static inline void put_uts_ns(struct uts_namespace *ns)
|
|
{
|
|
kref_put(&ns->kref, free_uts_ns);
|
|
}
|
|
#else
|
|
static inline void get_uts_ns(struct uts_namespace *ns)
|
|
{
|
|
}
|
|
|
|
static inline void put_uts_ns(struct uts_namespace *ns)
|
|
{
|
|
}
|
|
|
|
static inline struct uts_namespace *copy_utsname(unsigned long flags,
|
|
struct task_struct *tsk)
|
|
{
|
|
if (flags & CLONE_NEWUTS)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
return tsk->nsproxy->uts_ns;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PROC_SYSCTL
|
|
extern void uts_proc_notify(enum uts_proc proc);
|
|
#else
|
|
static inline void uts_proc_notify(enum uts_proc proc)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static inline struct new_utsname *utsname(void)
|
|
{
|
|
return ¤t->nsproxy->uts_ns->name;
|
|
}
|
|
|
|
static inline struct new_utsname *init_utsname(void)
|
|
{
|
|
return &init_uts_ns.name;
|
|
}
|
|
|
|
extern struct rw_semaphore uts_sem;
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_UTSNAME_H */
|