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This does not make a difference, but the code was confusing.
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This exposes an IP port on the container as local port using DNAT.
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https://github.com/vlajos/misspell_fixer
https://github.com/torstehu/systemd/commit/b6fdeb618cf2f3ce1645b3315f15f482710c7ffa
Thanks to Torstein Husebo <torstein@huseboe.net>.
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All we care about is that the kernel (pid==0) sent the message. Verifying the sender uid
seems to break when using userns.
Reported by Stéphane Graber.
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Only a minor change as the timeout would be hit soon thereafetr at the next loop.
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This caused rtnl_poll to always return true immediately in sd_rtnl_call().
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Read the message form the socket or we will loop trying to read the
same message repeatedly.
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We should just try again instead.
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We drop messages received from the wrong uid/pid, log this at debug level.
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The kernel always returns all addresses, rather than only for the given link, so let's only enumerate once.
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Nothing was being dropped, we just failed to account for the NLMSG_DONE.
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This makes the API more consistent.
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This way we can be sure that the returned list is stable regarding
modifications in the kernel.
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account
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Also check that the source netmask is 0, not only the destination
netmask.
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gateway
This is useful inside of containers or local networks to intrdouce a
stable name of the default gateway host (in case of containers usually
the host, in case of LANs usually local router).
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contents
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The one in tmpfiles.c:create_item() even looks like it fixes a bug.
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It corrrectly handles both positive and negative errno values.
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As a followup to 086891e5c1 "log: add an "error" parameter to all
low-level logging calls and intrdouce log_error_errno() as log calls
that take error numbers", use sed to convert the simple cases to use
the new macros:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/'
Multi-line log_*() invocations are not covered.
And we also should add log_unit_*_errno().
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We got the following error when running systemd on a device with many ports:
"rtnl: kernel receive buffer overrun
Event source 'rtnl-receive-message' returned error, disabling: No buffer space
available"
I think the kernel socket receive buffer queue should be increased. The default
value is taken from:
"/proc/sys/net/core/rmem_default", but we can overwrite it using SO_RCVBUF
socket option.
This is already done in networkd for other sockets.
For example, the bus socket (sd-bus/bus-socket.c) has a receive queue of 8MB.
In our case, the default is 208KB.
Increasing the buffer receive queue for manager socket to 512KB should be enough
to get rid of the above error.
[tomegun: bump the limit even higher to 8M]
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To mirror the recent name change of the concept for sd_bus objects,
follow the same logic for sd_event_source objects, too.
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Add bridge port attributes to sd-rtnl to configure
via networkd.
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This patch adds functionality to set family type
in the rtnl message for example PF_BRIDGE.
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The kernel mostly does not check this, but let's be consisntent and allways set it anyway. Based
on patch from Susant Sahani.
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We must filter out the 'network-byteorder' and 'nested' flags.
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It is redundant to store 'hash' and 'compare' function pointers in
struct Hashmap separately. The functions always comprise a pair.
Store a single pointer to struct hash_ops instead.
systemd keeps hundreds of hashmaps, so this saves a little bit of
memory.
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Creating the rtnl context is cheap, but freeing it may not be, due to
synchronous close().
Also drop some excessive logging. We now log about the changing ifname
exactly once.
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Reported by Thomas H.P. Andersen <phomes@gmail.com>.
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This should help in debugging failing event sources.
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makes ethernet addresses look funny
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In the long run this should become a full fledged client to networkd
(but not before networkd learns bus support). For now, just pull
interesting data out of networkd, udev, and rtnl and present it to the
user, in a simple but useful output.
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All routes added by networkd are currently set RTPROT_BOOT, which according
to the kernel means "Route installed during boot" (rtnetlink.h). But this
is not always the case as networkd changes routing after boot too. Since
the kernel gives more detailed protocols, use them.
With this patch, user-configured static routes now use RTPROT_STATIC (which
they are) and DHCP routes use RTPROT_DHCP. There is no define for IPv4LL
yet, so those are installed as RTPROT_STATIC (though perhaps RTPROT_RA is
better?).
[tomegun: fixup
src/network/networkd-link.c:972:33: error: too few arguments to function 'route_new_dynamic']
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Let's settle on a single type for all address family values, even if
UNIX is very inconsitent on the precise type otherwise. Given that
socket() is the primary entrypoint for the sockets API, and that uses
"int", and "int" is relatively simple and generic, we settle on "int"
for this.
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One missing string found.
A few things had to be moved around to make it possible to test them.
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