linux-stable/include/linux/user_namespace.h
Eric W. Biederman 76b6db0102 userns: Replace user_ns_map_uid and user_ns_map_gid with from_kuid and from_kgid
These function are no longer needed replace them with their more useful equivalents.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2012-05-03 03:28:39 -07:00

72 lines
1.5 KiB
C

#ifndef _LINUX_USER_NAMESPACE_H
#define _LINUX_USER_NAMESPACE_H
#include <linux/kref.h>
#include <linux/nsproxy.h>
#include <linux/sched.h>
#include <linux/err.h>
#define UID_GID_MAP_MAX_EXTENTS 5
struct uid_gid_map { /* 64 bytes -- 1 cache line */
u32 nr_extents;
struct uid_gid_extent {
u32 first;
u32 lower_first;
u32 count;
} extent[UID_GID_MAP_MAX_EXTENTS];
};
struct user_namespace {
struct uid_gid_map uid_map;
struct uid_gid_map gid_map;
struct kref kref;
struct user_namespace *parent;
kuid_t owner;
kgid_t group;
};
extern struct user_namespace init_user_ns;
#ifdef CONFIG_USER_NS
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
{
if (ns)
kref_get(&ns->kref);
return ns;
}
extern int create_user_ns(struct cred *new);
extern void free_user_ns(struct kref *kref);
static inline void put_user_ns(struct user_namespace *ns)
{
if (ns)
kref_put(&ns->kref, free_user_ns);
}
struct seq_operations;
extern struct seq_operations proc_uid_seq_operations;
extern struct seq_operations proc_gid_seq_operations;
extern ssize_t proc_uid_map_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t proc_gid_map_write(struct file *, const char __user *, size_t, loff_t *);
#else
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
{
return &init_user_ns;
}
static inline int create_user_ns(struct cred *new)
{
return -EINVAL;
}
static inline void put_user_ns(struct user_namespace *ns)
{
}
#endif
#endif /* _LINUX_USER_H */