This makes Request object takes hash, compare, free, and process functions.
With this change, the logic in networkd-queue.c can be mostly
independent of the type of the request or the object (e.g. Address) assigned
to the request, and it becomes simpler.
In most netlink handlers, we do the following,
1. decrease the message counter,
2. check the link state,
3. error handling,
4. update link state via e.g. link_check_ready().
The first two steps are mostly common, hence let's extract it.
Moreover, this is not only extracting the common logic, but provide a
strong advantage; `request_call_netlink_async()` assigns the relevant
Request object to the userdata of the netlink slot, and the request object
has full information about the message we sent. Hence, in the future,
netlink handler can print more detailed error message. E.g. when
an address is failed to configure, then currently we only show an
address is failed to configure, but with this commit, potentially we can
show which address is failed explicitly.
This does not change such error handling yet. But let's do that later.
This also renames e.g. request_process_address() -> address_process_request().
Also, this drops type checks such as `assert(req->type == REQUEST_TYPE_ADDRESS)`,
as in the later commits, the function of processing request, e.g.
`address_process_request()`, will be assigned to the Request object when
it is created. And the request type will be used to distinguish and to
avoid deduplicating requests which do not have any assigned objects,
like REQUEST_TYPE_DHCP4_CLIENT. Hence, the type checks in process functions
are mostly not necessary and redundant.
This is mostly cleanups and preparation for later commits, and should
not change any behavior.
This should not change any behavior, as req->netlink_handler is always
qdisc_handler or tclass_handler.
This is just a preparation for a later commit which introduces
request_call_netlink_async().
Structured initialization is used a bit more.
There were two kinds of log messages: about failed size calculations and
about failed appends to the message. I "downgraded" the first type to log_debug,
and moved the latter to the caller. This way there should be at most one high-priority
message.
I also changed sizeof(<type>) to sizeof(var) — there is less chance of select-and-paste
error in the second form.
In general we almost never hit those asserts in production code, so users see
them very rarely, if ever. But either way, we just need something that users
can pass to the developers.
We have quite a few of those asserts, and some have fairly nice messages, but
many are like "WTF?" or "???" or "unexpected something". The error that is
printed includes the file location, and function name. In almost all functions
there's at most one assert, so the function name alone is enough to identify
the failure for a developer. So we don't get much extra from the message, and
we might just as well drop them.
Dropping them makes our code a tiny bit smaller, and most importantly, improves
development experience by making it easy to insert such an assert in the code
without thinking how to phrase the argument.
A good chunk of parse-util.[ch] has been about parsing parts per
hundred/thousand/ten-thousand. Let's split that out into its own file.
No code changes, just some shuffling around.
Given that we now have a parser for permyriads, let's use it everywhere
for greater accuracy. This means wherever we previously supported % and
‰, we now also support ‱.
I started working on this because I wanted to change how
DEFINE_TRIVIAL_CLEANUP_FUNC is defined. Even independently of that change, it's
nice to make make things more consistent and predictable.
As suggested in https://github.com/systemd/systemd/pull/11484#issuecomment-775288617.
This does not touch anything exposed in src/systemd. Changing the defines there
would be a compatibility break.
Note that tests are broken after this commit. They will be fixed in the next one.
Yu Watanabe
Lennart Poettering
Zbigniew Jędrzejewski-Szmek
Susant Sahani
Frantisek Sumsal