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#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 "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_FOREACH(iter, first, _size) \
for (iter = (first); \
((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) && \
((uint8_t *)(iter) >= (uint8_t *)(first)); \
iter = (void*)(((uint8_t *)iter) + ALIGN8((iter)->size)))
#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_open_bus_fd(const char *bus, char **path);
#if 0 /// UNNEEDED by elogind
int bus_kernel_create_bus(const char *name, bool world, char **s);
int bus_kernel_create_endpoint(const char *bus_name, const char *ep_name, char **path);
#endif // 0
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);
uint64_t request_name_flags_to_kdbus(uint64_t sd_bus_flags);
uint64_t attach_flags_to_kdbus(uint64_t sd_bus_flags);
int bus_kernel_try_close(sd_bus *bus);
#if 0 /// UNNEEDED by elogind
int bus_kernel_drop_one(int fd);
#endif // 0
int bus_kernel_realize_attach_flags(sd_bus *bus);
int bus_kernel_get_bus_name(sd_bus *bus, char **name);
int bus_kernel_cmd_free(sd_bus *bus, uint64_t offset);
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