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Diffstat (limited to 'ipc/kdbus/handle.h')
| -rw-r--r-- | ipc/kdbus/handle.h | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/ipc/kdbus/handle.h b/ipc/kdbus/handle.h deleted file mode 100644 index 5dde2c10b..000000000 --- a/ipc/kdbus/handle.h +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Copyright (C) 2013-2015 Kay Sievers - * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - * Copyright (C) 2013-2015 Daniel Mack <daniel@zonque.org> - * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@gmail.com> - * Copyright (C) 2013-2015 Linux Foundation - * - * kdbus is free software; you can redistribute it and/or modify it under - * the terms of the GNU Lesser General Public License as published by the - * Free Software Foundation; either version 2.1 of the License, or (at - * your option) any later version. - */ - -#ifndef __KDBUS_HANDLE_H -#define __KDBUS_HANDLE_H - -#include <linux/fs.h> -#include <uapi/linux/kdbus.h> - -extern const struct file_operations kdbus_handle_ops; - -/** - * kdbus_arg - information and state of a single ioctl command item - * @type: item type - * @item: set by the parser to the first found item of this type - * @multiple: whether multiple items of this type are allowed - * @mandatory: whether at least one item of this type is required - * - * This structure describes a single item in an ioctl command payload. The - * caller has to pre-fill the type and flags, the parser will then use this - * information to verify the ioctl payload. @item is set by the parser to point - * to the first occurrence of the item. - */ -struct kdbus_arg { - u64 type; - struct kdbus_item *item; - bool multiple : 1; - bool mandatory : 1; -}; - -/** - * kdbus_args - information and state of ioctl command parser - * @allowed_flags: set of flags this command supports - * @argc: number of items in @argv - * @argv: array of items this command supports - * @user: set by parser to user-space location of current command - * @cmd: set by parser to kernel copy of command payload - * @cmd_buf: inline buf to avoid kmalloc() on small cmds - * @items: points to item array in @cmd - * @items_size: size of @items in bytes - * @is_cmd: whether this is a command-payload or msg-payload - * - * This structure is used to parse ioctl command payloads on each invocation. - * The ioctl handler has to pre-fill the flags and allowed items before passing - * the object to kdbus_args_parse(). The parser will copy the command payload - * into kernel-space and verify the correctness of the data. - * - * We use a 256 bytes buffer for small command payloads, to be allocated on - * stack on syscall entrance. - */ -struct kdbus_args { - u64 allowed_flags; - size_t argc; - struct kdbus_arg *argv; - - struct kdbus_cmd __user *user; - struct kdbus_cmd *cmd; - u8 cmd_buf[256]; - - struct kdbus_item *items; - size_t items_size; - bool is_cmd : 1; -}; - -int __kdbus_args_parse(struct kdbus_args *args, bool is_cmd, void __user *argp, - size_t type_size, size_t items_offset, void **out); -int kdbus_args_clear(struct kdbus_args *args, int ret); - -#define kdbus_args_parse(_args, _argp, _v) \ - ({ \ - BUILD_BUG_ON(offsetof(typeof(**(_v)), size) != \ - offsetof(struct kdbus_cmd, size)); \ - BUILD_BUG_ON(offsetof(typeof(**(_v)), flags) != \ - offsetof(struct kdbus_cmd, flags)); \ - BUILD_BUG_ON(offsetof(typeof(**(_v)), return_flags) != \ - offsetof(struct kdbus_cmd, return_flags)); \ - __kdbus_args_parse((_args), 1, (_argp), sizeof(**(_v)), \ - offsetof(typeof(**(_v)), items), \ - (void **)(_v)); \ - }) - -#define kdbus_args_parse_msg(_args, _argp, _v) \ - ({ \ - BUILD_BUG_ON(offsetof(typeof(**(_v)), size) != \ - offsetof(struct kdbus_cmd, size)); \ - BUILD_BUG_ON(offsetof(typeof(**(_v)), flags) != \ - offsetof(struct kdbus_cmd, flags)); \ - __kdbus_args_parse((_args), 0, (_argp), sizeof(**(_v)), \ - offsetof(typeof(**(_v)), items), \ - (void **)(_v)); \ - }) - -#endif |