80 vfsuid_t make_vfsuid(struct mnt_idmap *idmap,  in make_vfsuid()  argument
86 	if (idmap == &nop_mnt_idmap)  in make_vfsuid()
88 	if (idmap == &invalid_mnt_idmap)  in make_vfsuid()
96 	return VFSUIDT_INIT_RAW(map_id_down(&idmap->uid_map, uid));  in make_vfsuid()
120 vfsgid_t make_vfsgid(struct mnt_idmap *idmap,  in make_vfsgid()  argument
125 	if (idmap == &nop_mnt_idmap)  in make_vfsgid()
127 	if (idmap == &invalid_mnt_idmap)  in make_vfsgid()
135 	return VFSGIDT_INIT_RAW(map_id_down(&idmap->gid_map, gid));  in make_vfsgid()
150 kuid_t from_vfsuid(struct mnt_idmap *idmap,  in from_vfsuid()  argument
155 	if (idmap == &nop_mnt_idmap)  in from_vfsuid()
157 	if (idmap == &invalid_mnt_idmap)  in from_vfsuid()
159 	uid = map_id_up(&idmap->uid_map, __vfsuid_val(vfsuid));  in from_vfsuid()
179 kgid_t from_vfsgid(struct mnt_idmap *idmap,  in from_vfsgid()  argument
184 	if (idmap == &nop_mnt_idmap)  in from_vfsgid()
186 	if (idmap == &invalid_mnt_idmap)  in from_vfsgid()
188 	gid = map_id_up(&idmap->gid_map, __vfsgid_val(vfsgid));  in from_vfsgid()
274 static void free_mnt_idmap(struct mnt_idmap *idmap)  in free_mnt_idmap()  argument
276 	if (idmap->uid_map.nr_extents > UID_GID_MAP_MAX_BASE_EXTENTS) {  in free_mnt_idmap()
277 		kfree(idmap->uid_map.forward);  in free_mnt_idmap()
278 		kfree(idmap->uid_map.reverse);  in free_mnt_idmap()
280 	if (idmap->gid_map.nr_extents > UID_GID_MAP_MAX_BASE_EXTENTS) {  in free_mnt_idmap()
281 		kfree(idmap->gid_map.forward);  in free_mnt_idmap()
282 		kfree(idmap->gid_map.reverse);  in free_mnt_idmap()
284 	kfree(idmap);  in free_mnt_idmap()
289 	struct mnt_idmap *idmap;  in alloc_mnt_idmap()  local
292 	idmap = kzalloc(sizeof(struct mnt_idmap), GFP_KERNEL_ACCOUNT);  in alloc_mnt_idmap()
293 	if (!idmap)  in alloc_mnt_idmap()
296 	refcount_set(&idmap->count, 1);  in alloc_mnt_idmap()
297 	ret = copy_mnt_idmap(&mnt_userns->uid_map, &idmap->uid_map);  in alloc_mnt_idmap()
299 		ret = copy_mnt_idmap(&mnt_userns->gid_map, &idmap->gid_map);  in alloc_mnt_idmap()
301 		free_mnt_idmap(idmap);  in alloc_mnt_idmap()
302 		idmap = ERR_PTR(ret);  in alloc_mnt_idmap()
304 	return idmap;  in alloc_mnt_idmap()
315 struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap)  in mnt_idmap_get()  argument
317 	if (idmap != &nop_mnt_idmap && idmap != &invalid_mnt_idmap)  in mnt_idmap_get()
318 		refcount_inc(&idmap->count);  in mnt_idmap_get()
320 	return idmap;  in mnt_idmap_get()
331 void mnt_idmap_put(struct mnt_idmap *idmap)  in mnt_idmap_put()  argument
333 	if (idmap != &nop_mnt_idmap && idmap != &invalid_mnt_idmap &&  in mnt_idmap_put()
334 	    refcount_dec_and_test(&idmap->count))  in mnt_idmap_put()
335 		free_mnt_idmap(idmap);  in mnt_idmap_put()
339 int statmount_mnt_idmap(struct mnt_idmap *idmap, struct seq_file *seq, bool uid_map)  in statmount_mnt_idmap()  argument
344 	if (!is_valid_mnt_idmap(idmap))  in statmount_mnt_idmap()
352 		map = &idmap->uid_map;  in statmount_mnt_idmap()
355 		map = &idmap->gid_map;  in statmount_mnt_idmap()