79 vfsuid_t make_vfsuid(struct mnt_idmap *idmap,  in make_vfsuid()  argument
85 	if (idmap == &nop_mnt_idmap)  in make_vfsuid()
87 	if (idmap == &invalid_mnt_idmap)  in make_vfsuid()
95 	return VFSUIDT_INIT_RAW(map_id_down(&idmap->uid_map, uid));  in make_vfsuid()
119 vfsgid_t make_vfsgid(struct mnt_idmap *idmap,  in make_vfsgid()  argument
124 	if (idmap == &nop_mnt_idmap)  in make_vfsgid()
126 	if (idmap == &invalid_mnt_idmap)  in make_vfsgid()
134 	return VFSGIDT_INIT_RAW(map_id_down(&idmap->gid_map, gid));  in make_vfsgid()
149 kuid_t from_vfsuid(struct mnt_idmap *idmap,  in from_vfsuid()  argument
154 	if (idmap == &nop_mnt_idmap)  in from_vfsuid()
156 	if (idmap == &invalid_mnt_idmap)  in from_vfsuid()
158 	uid = map_id_up(&idmap->uid_map, __vfsuid_val(vfsuid));  in from_vfsuid()
178 kgid_t from_vfsgid(struct mnt_idmap *idmap,  in from_vfsgid()  argument
183 	if (idmap == &nop_mnt_idmap)  in from_vfsgid()
185 	if (idmap == &invalid_mnt_idmap)  in from_vfsgid()
187 	gid = map_id_up(&idmap->gid_map, __vfsgid_val(vfsgid));  in from_vfsgid()
273 static void free_mnt_idmap(struct mnt_idmap *idmap)  in free_mnt_idmap()  argument
275 	if (idmap->uid_map.nr_extents > UID_GID_MAP_MAX_BASE_EXTENTS) {  in free_mnt_idmap()
276 		kfree(idmap->uid_map.forward);  in free_mnt_idmap()
277 		kfree(idmap->uid_map.reverse);  in free_mnt_idmap()
279 	if (idmap->gid_map.nr_extents > UID_GID_MAP_MAX_BASE_EXTENTS) {  in free_mnt_idmap()
280 		kfree(idmap->gid_map.forward);  in free_mnt_idmap()
281 		kfree(idmap->gid_map.reverse);  in free_mnt_idmap()
283 	kfree(idmap);  in free_mnt_idmap()
288 	struct mnt_idmap *idmap;  in alloc_mnt_idmap()  local
291 	idmap = kzalloc(sizeof(struct mnt_idmap), GFP_KERNEL_ACCOUNT);  in alloc_mnt_idmap()
292 	if (!idmap)  in alloc_mnt_idmap()
295 	refcount_set(&idmap->count, 1);  in alloc_mnt_idmap()
296 	ret = copy_mnt_idmap(&mnt_userns->uid_map, &idmap->uid_map);  in alloc_mnt_idmap()
298 		ret = copy_mnt_idmap(&mnt_userns->gid_map, &idmap->gid_map);  in alloc_mnt_idmap()
300 		free_mnt_idmap(idmap);  in alloc_mnt_idmap()
301 		idmap = ERR_PTR(ret);  in alloc_mnt_idmap()
303 	return idmap;  in alloc_mnt_idmap()
314 struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap)  in mnt_idmap_get()  argument
316 	if (idmap != &nop_mnt_idmap && idmap != &invalid_mnt_idmap)  in mnt_idmap_get()
317 		refcount_inc(&idmap->count);  in mnt_idmap_get()
319 	return idmap;  in mnt_idmap_get()
330 void mnt_idmap_put(struct mnt_idmap *idmap)  in mnt_idmap_put()  argument
332 	if (idmap != &nop_mnt_idmap && idmap != &invalid_mnt_idmap &&  in mnt_idmap_put()
333 	    refcount_dec_and_test(&idmap->count))  in mnt_idmap_put()
334 		free_mnt_idmap(idmap);  in mnt_idmap_put()