mnt_idmapping.h (fc04dafd263d8c0b0251b63d47f35b29373d50f2) mnt_idmapping.h (77940f0d96cd2ec9fe2125f74f513a7254bcdd7f)
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_MNT_IDMAPPING_H
3#define _LINUX_MNT_IDMAPPING_H
4
5#include <linux/types.h>
6#include <linux/uidgid.h>
7
8struct user_namespace;

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65
66static inline bool vfsgid_eq(vfsgid_t left, vfsgid_t right)
67{
68 return vfsgid_valid(left) && __vfsgid_val(left) == __vfsgid_val(right);
69}
70
71/**
72 * vfsuid_eq_kuid - check whether kuid and vfsuid have the same value
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_MNT_IDMAPPING_H
3#define _LINUX_MNT_IDMAPPING_H
4
5#include <linux/types.h>
6#include <linux/uidgid.h>
7
8struct user_namespace;

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65
66static inline bool vfsgid_eq(vfsgid_t left, vfsgid_t right)
67{
68 return vfsgid_valid(left) && __vfsgid_val(left) == __vfsgid_val(right);
69}
70
71/**
72 * vfsuid_eq_kuid - check whether kuid and vfsuid have the same value
73 * @kuid: the kuid to compare
74 * @vfsuid: the vfsuid to compare
73 * @vfsuid: the vfsuid to compare
74 * @kuid: the kuid to compare
75 *
75 *
76 * Check whether @kuid and @vfsuid have the same values.
76 * Check whether @vfsuid and @kuid have the same values.
77 *
77 *
78 * Return: true if @kuid and @vfsuid have the same value, false if not.
78 * Return: true if @vfsuid and @kuid have the same value, false if not.
79 * Comparison between two invalid uids returns false.
80 */
81static inline bool vfsuid_eq_kuid(vfsuid_t vfsuid, kuid_t kuid)
82{
83 return vfsuid_valid(vfsuid) && __vfsuid_val(vfsuid) == __kuid_val(kuid);
84}
85
86/**
87 * vfsgid_eq_kgid - check whether kgid and vfsgid have the same value
79 * Comparison between two invalid uids returns false.
80 */
81static inline bool vfsuid_eq_kuid(vfsuid_t vfsuid, kuid_t kuid)
82{
83 return vfsuid_valid(vfsuid) && __vfsuid_val(vfsuid) == __kuid_val(kuid);
84}
85
86/**
87 * vfsgid_eq_kgid - check whether kgid and vfsgid have the same value
88 * @kgid: the kgid to compare
89 * @vfsgid: the vfsgid to compare
88 * @vfsgid: the vfsgid to compare
89 * @kgid: the kgid to compare
90 *
90 *
91 * Check whether @kgid and @vfsgid have the same values.
91 * Check whether @vfsgid and @kgid have the same values.
92 *
92 *
93 * Return: true if @kgid and @vfsgid have the same value, false if not.
93 * Return: true if @vfsgid and @kgid have the same value, false if not.
94 * Comparison between two invalid gids returns false.
95 */
94 * Comparison between two invalid gids returns false.
95 */
96static inline bool vfsgid_eq_kgid(kgid_t kgid, vfsgid_t vfsgid)
96static inline bool vfsgid_eq_kgid(vfsgid_t vfsgid, kgid_t kgid)
97{
98 return vfsgid_valid(vfsgid) && __vfsgid_val(vfsgid) == __kgid_val(kgid);
99}
100
101/*
102 * vfs{g,u}ids are created from k{g,u}ids.
103 * We don't allow them to be created from regular {u,g}id.
104 */

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166 */
167static inline bool no_idmapping(const struct user_namespace *mnt_userns,
168 const struct user_namespace *fs_userns)
169{
170 return initial_idmapping(mnt_userns) || mnt_userns == fs_userns;
171}
172
173/**
97{
98 return vfsgid_valid(vfsgid) && __vfsgid_val(vfsgid) == __kgid_val(kgid);
99}
100
101/*
102 * vfs{g,u}ids are created from k{g,u}ids.
103 * We don't allow them to be created from regular {u,g}id.
104 */

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166 */
167static inline bool no_idmapping(const struct user_namespace *mnt_userns,
168 const struct user_namespace *fs_userns)
169{
170 return initial_idmapping(mnt_userns) || mnt_userns == fs_userns;
171}
172
173/**
174 * mapped_kuid_fs - map a filesystem kuid into a mnt_userns
174 * make_vfsuid - map a filesystem kuid into a mnt_userns
175 * @mnt_userns: the mount's idmapping
176 * @fs_userns: the filesystem's idmapping
177 * @kuid : kuid to be mapped
178 *
179 * Take a @kuid and remap it from @fs_userns into @mnt_userns. Use this
180 * function when preparing a @kuid to be reported to userspace.
181 *
182 * If no_idmapping() determines that this is not an idmapped mount we can

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211static inline kuid_t mapped_kuid_fs(struct user_namespace *mnt_userns,
212 struct user_namespace *fs_userns,
213 kuid_t kuid)
214{
215 return AS_KUIDT(make_vfsuid(mnt_userns, fs_userns, kuid));
216}
217
218/**
175 * @mnt_userns: the mount's idmapping
176 * @fs_userns: the filesystem's idmapping
177 * @kuid : kuid to be mapped
178 *
179 * Take a @kuid and remap it from @fs_userns into @mnt_userns. Use this
180 * function when preparing a @kuid to be reported to userspace.
181 *
182 * If no_idmapping() determines that this is not an idmapped mount we can

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211static inline kuid_t mapped_kuid_fs(struct user_namespace *mnt_userns,
212 struct user_namespace *fs_userns,
213 kuid_t kuid)
214{
215 return AS_KUIDT(make_vfsuid(mnt_userns, fs_userns, kuid));
216}
217
218/**
219 * mapped_kgid_fs - map a filesystem kgid into a mnt_userns
219 * make_vfsgid - map a filesystem kgid into a mnt_userns
220 * @mnt_userns: the mount's idmapping
221 * @fs_userns: the filesystem's idmapping
222 * @kgid : kgid to be mapped
223 *
224 * Take a @kgid and remap it from @fs_userns into @mnt_userns. Use this
225 * function when preparing a @kgid to be reported to userspace.
226 *
227 * If no_idmapping() determines that this is not an idmapped mount we can

--- 222 unchanged lines hidden --- 		220 * @mnt_userns: the mount's idmapping
221 * @fs_userns: the filesystem's idmapping
222 * @kgid : kgid to be mapped
223 *
224 * Take a @kgid and remap it from @fs_userns into @mnt_userns. Use this
225 * function when preparing a @kgid to be reported to userspace.
226 *
227 * If no_idmapping() determines that this is not an idmapped mount we can

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