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There is no reason to tie the two together: in principle we may have
in the future a unit type which does not define .serialize/.deserialize_item,
but we would still want to call the compat deserialization code for it.
When suppressing duplicate fields between files we so far tried to reuse
the already known hash value of the data fields between files. This was
fine as long as we used the same hash function everywhere. However,
since addition of the keyed hash feature for journal files this doesn't
work anymore, since the hashes will be different for different files.
Fixes: #19172
This makes the followings:
- reduces scope of variables,
- drop unnecessary 'else'
- use CLOSE_AND_REPLACE() macro
- use strnull() for possible NULL string
If we have BPF_F_ALLOW_MULTI support we can install the new program
before we drop the old (because we can install two program at the same
time). Let's do that, and thus fully close the firewall
gap.
E.g. nexthop requires IFF_UP flag, but the currently stored flag may be
outdated if we called link_down(). This makes such requests pending if
at least one of the flags are updating.
On carrier lost, then all requests which require carrier will not be
processed. And they will be processed when the interface gained its
carrier again. So, it is not necessary to drop requests here.
Previously, IPv6LinkLocalAddressGenerationMode= is not set, then we
define the address generation mode based on the result of reading
stable_secret sysctl value. This makes the mode is determined by whether
a secret address is specified in the new setting.
Closes#19622.
Mostly logging related: let's downgrade logging in dlopen_bpf() for
example, and remove duplicate logging at various places. Add %m to log
messages and so on.
These are so many runtime objects, let's add a bpf_firewall_close()
helper that destroys them all, and call that from unit_free(), simply as
an excercise of encapsulating more BPF code in bpf-firewall.c.
This also brings the destruction order and variable declaration order in
struct Unit into the same systematic order.
No change in behaviour just some minor refactoring.
