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The name list and query functions now work differently in kdbus, as the
result is stored in the connection's pool, rather than being copied back
through the ioctl buffer. That also safes us some logic, as we don't
have to resize the communication buffer in a loop with growing buffer
sizes.
Due to this, KDBUS_CMD_MSG_RELEASE was renamed to KDBUS_CMD_FREE, as it
is now used outside the message logic as well.
The signals appear entirely redundant due to NameOwnerChange, hence
don't do them in the new library, instead leave them for the
compatibility bridge only.
Also, set the serial number for synthesized messages to (uint32_t) -1.
We don't do this for .c files either, even they are also influence quite
a bit by makefile settings. Given that XSLT is a lot slower then the
rest of the build let's make our build a bit faster if people end up
touching the Makefile.
We need this so that one incoming kernel message can result in two
high-level bus messages, for the case where we synthesize NameAcquired
and NameOwnerChanged in the same instance.
Augment systemd-stdio-bridge a bit to make it a 1:1 bridge from legacy
DBus clients to kdbus. In particular,
* allow setting the bus path of the upstream bus as command line
argument
* use sd_listen_fds() for systemd's socket activation
* omit calling sd_bus_negotiate_fds() when upstream bus is kdbus
* reply to bus send errors with proper dbus error messages
* treat -ECONNRESET as expected end-of-connection condition
kdbus returns -EALREADY if the requesting connection is already the
owner of a name, and -EEXIST if the name already exists and the
connection is not able to take it over.
Also, n->flags needs a translation as well to match the SD_BUS_* enum
values.
Flags used to request a name from kdbus are not identical to what DBus
and sd_bus use internally. Introduce a simple function to do the
translation for us. It's factored out to a separate function so the
dbus-driver instance can make use of it as well.
In particular, KDBUS_ITEM_NEXT is now called KDBUS_PART_NEXT, and
KDBUS_ITEM_FOREACH was renamed to KDBUS_PART_FOREACH and takes one more
argument to make it more flexible.
This reverts commit f1a1264d13.
We can turn this off with a pragma only on old gcc. Newer gcc doesn't
need this, so let's not turn this off for everybody.
It didn't build on arm. Let's simplify it a bit by
splitting x86 specific parts out, which should also make
things easier when arm virtualization support is added.
