1 #ifndef __GADGET_CONFIGFS__ 2 #define __GADGET_CONFIGFS__ 3 4 #include <linux/configfs.h> 5 6 int check_user_usb_string(const char *name, 7 struct usb_gadget_strings *stringtab_dev); 8 9 #define GS_STRINGS_W(__struct, __name) \ 10 static ssize_t __struct##_##__name##_store(struct config_item *item, \ 11 const char *page, size_t len) \ 12 { \ 13 struct __struct *gs = to_##__struct(item); \ 14 int ret; \ 15 \ 16 ret = usb_string_copy(page, &gs->__name); \ 17 if (ret) \ 18 return ret; \ 19 return len; \ 20 } 21 22 #define GS_STRINGS_R(__struct, __name) \ 23 static ssize_t __struct##_##__name##_show(struct config_item *item, char *page) \ 24 { \ 25 struct __struct *gs = to_##__struct(item); \ 26 return sprintf(page, "%s\n", gs->__name ?: ""); \ 27 } 28 29 #define GS_STRINGS_RW(struct_name, _name) \ 30 GS_STRINGS_R(struct_name, _name) \ 31 GS_STRINGS_W(struct_name, _name) \ 32 CONFIGFS_ATTR(struct_name##_, _name) 33 34 #define USB_CONFIG_STRING_RW_OPS(struct_in) \ 35 static struct configfs_item_operations struct_in##_langid_item_ops = { \ 36 .release = struct_in##_attr_release, \ 37 }; \ 38 \ 39 static struct config_item_type struct_in##_langid_type = { \ 40 .ct_item_ops = &struct_in##_langid_item_ops, \ 41 .ct_attrs = struct_in##_langid_attrs, \ 42 .ct_owner = THIS_MODULE, \ 43 } 44 45 #define USB_CONFIG_STRINGS_LANG(struct_in, struct_member) \ 46 static struct config_group *struct_in##_strings_make( \ 47 struct config_group *group, \ 48 const char *name) \ 49 { \ 50 struct struct_member *gi; \ 51 struct struct_in *gs; \ 52 struct struct_in *new; \ 53 int langs = 0; \ 54 int ret; \ 55 \ 56 new = kzalloc(sizeof(*new), GFP_KERNEL); \ 57 if (!new) \ 58 return ERR_PTR(-ENOMEM); \ 59 \ 60 ret = check_user_usb_string(name, &new->stringtab_dev); \ 61 if (ret) \ 62 goto err; \ 63 config_group_init_type_name(&new->group, name, \ 64 &struct_in##_langid_type); \ 65 \ 66 gi = container_of(group, struct struct_member, strings_group); \ 67 ret = -EEXIST; \ 68 list_for_each_entry(gs, &gi->string_list, list) { \ 69 if (gs->stringtab_dev.language == new->stringtab_dev.language) \ 70 goto err; \ 71 langs++; \ 72 } \ 73 ret = -EOVERFLOW; \ 74 if (langs >= MAX_USB_STRING_LANGS) \ 75 goto err; \ 76 \ 77 list_add_tail(&new->list, &gi->string_list); \ 78 return &new->group; \ 79 err: \ 80 kfree(new); \ 81 return ERR_PTR(ret); \ 82 } \ 83 \ 84 static void struct_in##_strings_drop( \ 85 struct config_group *group, \ 86 struct config_item *item) \ 87 { \ 88 config_item_put(item); \ 89 } \ 90 \ 91 static struct configfs_group_operations struct_in##_strings_ops = { \ 92 .make_group = &struct_in##_strings_make, \ 93 .drop_item = &struct_in##_strings_drop, \ 94 }; \ 95 \ 96 static struct config_item_type struct_in##_strings_type = { \ 97 .ct_group_ops = &struct_in##_strings_ops, \ 98 .ct_owner = THIS_MODULE, \ 99 } 100 101 #endif 102