/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** This file is part of systemd. Copyright 2013 Lennart Poettering systemd 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. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdbool.h> #include "busname.h" #include "sd-bus.h" #define KDBUS_ITEM_NEXT(item) \ (typeof(item))(((uint8_t *)item) + ALIGN8((item)->size)) #define KDBUS_ITEM_FOREACH(part, head, first) \ for (part = (head)->first; \ ((uint8_t *)(part) < (uint8_t *)(head) + (head)->size) && \ ((uint8_t *) part >= (uint8_t *) head); \ part = KDBUS_ITEM_NEXT(part)) #define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data) #define KDBUS_ITEM_SIZE(s) ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE) #define MEMFD_CACHE_MAX 32 /* When we cache a memfd block for reuse, we will truncate blocks * longer than this in order not to keep too much data around. */ #define MEMFD_CACHE_ITEM_SIZE_MAX (128*1024) /* This determines at which minimum size we prefer sending memfds over * sending vectors */ #define MEMFD_MIN_SIZE (512*1024) /* The size of the per-connection memory pool that we set up and where * the kernel places our incoming messages */ #define KDBUS_POOL_SIZE (16*1024*1024) struct memfd_cache { int fd; void *address; size_t mapped; size_t allocated; }; int bus_kernel_connect(sd_bus *b); int bus_kernel_take_fd(sd_bus *b); int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call); int bus_kernel_read_message(sd_bus *bus, bool hint_priority, int64_t priority); int bus_kernel_create_bus(const char *name, bool world, char **s); int bus_kernel_create_domain(const char *name, char **s); int bus_kernel_create_starter(const char *bus, const char *name, bool activating, bool accept_fd, BusNamePolicy *policy); int bus_kernel_create_monitor(const char *bus); int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *mapped, size_t *allocated); void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t mapped, size_t allocated); void bus_kernel_flush_memfd(sd_bus *bus); int bus_kernel_parse_unique_name(const char *s, uint64_t *id); int kdbus_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags); int kdbus_translate_attach_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags); int bus_kernel_try_close(sd_bus *bus); int bus_kernel_drop_one(int fd);