Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
C
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_PROJID_H#define _LINUX_PROJID_H
/* * A set of types for the internal kernel types representing project ids. * * The types defined in this header allow distinguishing which project ids in * the kernel are values used by userspace and which project id 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/types.h>
struct user_namespace;extern struct user_namespace init_user_ns;
typedef __kernel_uid32_t projid_t;
typedef struct { projid_t val;} kprojid_t;
static inline projid_t __kprojid_val(kprojid_t projid){ return projid.val;}
#define KPROJIDT_INIT(value) (kprojid_t){ value }
#define INVALID_PROJID KPROJIDT_INIT(-1)#define OVERFLOW_PROJID 65534
static inline bool projid_eq(kprojid_t left, kprojid_t right){ return __kprojid_val(left) == __kprojid_val(right);}
static inline bool projid_lt(kprojid_t left, kprojid_t right){ return __kprojid_val(left) < __kprojid_val(right);}
static inline bool projid_valid(kprojid_t projid){ return !projid_eq(projid, INVALID_PROJID);}
#ifdef CONFIG_USER_NS
extern kprojid_t make_kprojid(struct user_namespace *from, projid_t projid);
extern projid_t from_kprojid(struct user_namespace *to, kprojid_t projid);extern projid_t from_kprojid_munged(struct user_namespace *to, kprojid_t projid);
static inline bool kprojid_has_mapping(struct user_namespace *ns, kprojid_t projid){ return from_kprojid(ns, projid) != (projid_t)-1;}
#else
static inline kprojid_t make_kprojid(struct user_namespace *from, projid_t projid){ return KPROJIDT_INIT(projid);}
static inline projid_t from_kprojid(struct user_namespace *to, kprojid_t kprojid){ return __kprojid_val(kprojid);}
static inline projid_t from_kprojid_munged(struct user_namespace *to, kprojid_t kprojid){ projid_t projid = from_kprojid(to, kprojid); if (projid == (projid_t)-1) projid = OVERFLOW_PROJID; return projid;}
static inline bool kprojid_has_mapping(struct user_namespace *ns, kprojid_t projid){ return true;}
#endif /* CONFIG_USER_NS */
#endif /* _LINUX_PROJID_H */