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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_UIDGID_H#define _LINUX_UIDGID_H
/* * A set of types for the internal kernel types representing uids and gids. * * The types defined in this header allow distinguishing which uids and gids in * the kernel are values used by userspace and which uid and gid values are * the internal kernel values. With the addition of user namespaces the values * can be different. Using the type system makes it possible for the compiler * to detect when we overlook these differences. * */#include <linux/uidgid_types.h>#include <linux/highuid.h>
struct user_namespace;extern struct user_namespace init_user_ns;struct uid_gid_map;
#define KUIDT_INIT(value) (kuid_t){ value }#define KGIDT_INIT(value) (kgid_t){ value }
#ifdef CONFIG_MULTIUSERstatic inline uid_t __kuid_val(kuid_t uid){ return uid.val;}
static inline gid_t __kgid_val(kgid_t gid){ return gid.val;}#elsestatic inline uid_t __kuid_val(kuid_t uid){ return 0;}
static inline gid_t __kgid_val(kgid_t gid){ return 0;}#endif
#define GLOBAL_ROOT_UID KUIDT_INIT(0)#define GLOBAL_ROOT_GID KGIDT_INIT(0)
#define INVALID_UID KUIDT_INIT(-1)#define INVALID_GID KGIDT_INIT(-1)
static inline bool uid_eq(kuid_t left, kuid_t right){ return __kuid_val(left) == __kuid_val(right);}
static inline bool gid_eq(kgid_t left, kgid_t right){ return __kgid_val(left) == __kgid_val(right);}
static inline bool uid_gt(kuid_t left, kuid_t right){ return __kuid_val(left) > __kuid_val(right);}
static inline bool gid_gt(kgid_t left, kgid_t right){ return __kgid_val(left) > __kgid_val(right);}
static inline bool uid_gte(kuid_t left, kuid_t right){ return __kuid_val(left) >= __kuid_val(right);}
static inline bool gid_gte(kgid_t left, kgid_t right){ return __kgid_val(left) >= __kgid_val(right);}
static inline bool uid_lt(kuid_t left, kuid_t right){ return __kuid_val(left) < __kuid_val(right);}
static inline bool gid_lt(kgid_t left, kgid_t right){ return __kgid_val(left) < __kgid_val(right);}
static inline bool uid_lte(kuid_t left, kuid_t right){ return __kuid_val(left) <= __kuid_val(right);}
static inline bool gid_lte(kgid_t left, kgid_t right){ return __kgid_val(left) <= __kgid_val(right);}
static inline bool uid_valid(kuid_t uid){ return __kuid_val(uid) != (uid_t) -1;}
static inline bool gid_valid(kgid_t gid){ return __kgid_val(gid) != (gid_t) -1;}
#ifdef CONFIG_USER_NS
extern kuid_t make_kuid(struct user_namespace *from, uid_t uid);extern kgid_t make_kgid(struct user_namespace *from, gid_t gid);
extern uid_t from_kuid(struct user_namespace *to, kuid_t uid);extern gid_t from_kgid(struct user_namespace *to, kgid_t gid);extern uid_t from_kuid_munged(struct user_namespace *to, kuid_t uid);extern gid_t from_kgid_munged(struct user_namespace *to, kgid_t gid);
static inline bool kuid_has_mapping(struct user_namespace *ns, kuid_t uid){ return from_kuid(ns, uid) != (uid_t) -1;}
static inline bool kgid_has_mapping(struct user_namespace *ns, kgid_t gid){ return from_kgid(ns, gid) != (gid_t) -1;}
u32 map_id_down(struct uid_gid_map *map, u32 id);u32 map_id_up(struct uid_gid_map *map, u32 id);u32 map_id_range_up(struct uid_gid_map *map, u32 id, u32 count);
#else
static inline kuid_t make_kuid(struct user_namespace *from, uid_t uid){ return KUIDT_INIT(uid);}
static inline kgid_t make_kgid(struct user_namespace *from, gid_t gid){ return KGIDT_INIT(gid);}
static inline uid_t from_kuid(struct user_namespace *to, kuid_t kuid){ return __kuid_val(kuid);}
static inline gid_t from_kgid(struct user_namespace *to, kgid_t kgid){ return __kgid_val(kgid);}
static inline uid_t from_kuid_munged(struct user_namespace *to, kuid_t kuid){ uid_t uid = from_kuid(to, kuid); if (uid == (uid_t)-1) uid = overflowuid; return uid;}
static inline gid_t from_kgid_munged(struct user_namespace *to, kgid_t kgid){ gid_t gid = from_kgid(to, kgid); if (gid == (gid_t)-1) gid = overflowgid; return gid;}
static inline bool kuid_has_mapping(struct user_namespace *ns, kuid_t uid){ return uid_valid(uid);}
static inline bool kgid_has_mapping(struct user_namespace *ns, kgid_t gid){ return gid_valid(gid);}
static inline u32 map_id_down(struct uid_gid_map *map, u32 id){ return id;}
static inline u32 map_id_range_up(struct uid_gid_map *map, u32 id, u32 count){ return id;}
static inline u32 map_id_up(struct uid_gid_map *map, u32 id){ return id;}#endif /* CONFIG_USER_NS */
#endif /* _LINUX_UIDGID_H */