82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include "sd-bus.h"
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#define KDBUS_ITEM_NEXT(item) \
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(typeof(item))(((uint8_t *)item) + ALIGN8((item)->size))
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#define KDBUS_ITEM_FOREACH(part, head, first) \
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for (part = (head)->first; \
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(uint8_t *)(part) < (uint8_t *)(head) + (head)->size; \
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part = KDBUS_ITEM_NEXT(part))
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#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
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#define KDBUS_ITEM_SIZE(s) ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
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#define MEMFD_CACHE_MAX 32
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/* When we cache a memfd block for reuse, we will truncate blocks
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* longer than this in order not to keep too much data around. */
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#define MEMFD_CACHE_ITEM_SIZE_MAX (128*1024)
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/* This determines at which minimum size we prefer sending memfds over
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* sending vectors */
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#define MEMFD_MIN_SIZE (128*1024)
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/* The size of the per-connection memory pool that we set up and where
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* the kernel places our incoming messages */
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#define KDBUS_POOL_SIZE (16*1024*1024)
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struct memfd_cache {
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int fd;
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void *address;
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size_t mapped;
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size_t allocated;
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};
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int bus_kernel_connect(sd_bus *b);
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int bus_kernel_take_fd(sd_bus *b);
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int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m);
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int bus_kernel_read_message(sd_bus *bus);
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int bus_kernel_create_bus(const char *name, bool world, char **s);
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int bus_kernel_create_namespace(const char *name, char **s);
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int bus_kernel_create_starter(const char *bus, const char *name);
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int bus_kernel_create_monitor(const char *bus);
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int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *mapped, size_t *allocated);
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void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t mapped, size_t allocated);
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void bus_kernel_flush_memfd(sd_bus *bus);
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int bus_kernel_parse_unique_name(const char *s, uint64_t *id);
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int kdbus_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags);
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int kdbus_translate_attach_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags);
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int bus_kernel_try_close(sd_bus *bus);
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