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If our netlink input buffer overruns the kernel will send us ENOBUFS on
the next recvmsg(). Don't consider this a complete failure resulting in
closing of the netlink socket. Instead, simply continue (after debug
logging).
Of course, ideally we'd have a better strategy for this, and would have
a way to resync if this happens (as well as a scheme for cancelling all
ongoing asynchronous transactions), but for now let's at least not choke
fatally, and simply accept that we lost some messages and continue.
Note that if we lose messages when synchronously waiting for an
operation to complete, we'll still propagate the ENOBUFS up, to make the
individual transaction fail.
See: #5398
(This bug does not properly fix the issue, hence we should leave the bug
open.)
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This patch handles the custom MTU field in IPv6 RA.
fixes RFE #4464
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We don't have plural in the name of any other -util files and this
inconsistency trips me up every time I try to type this file name
from memory. "formats-util" is even hard to pronounce.
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1. add support for kind vcan
2. fixup indention netlink-types.c, networkd-netdev.c
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put limits on addresses and routers per link and per network
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On larger systems we might very well see messages with thousands of parts.
When we free them, we must avoid recursing into each part, otherwise we
very likely get stack overflows.
Fix sd_netlink_message_unref() to use an iterative approach rather than
recursion (also avoid tail-recursion in case it is not optimized by the
compiler).
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Drop weird "const" usage, and use size_t for sizes.
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Also adjust indentation in various places.
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Introduce
1. sd_rtnl_message_route_set_table to set table ID
2. sd_rtnl_message_route_set_family to set family
Both required to configure route properties.
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Also remove the braces add_rtattr not required.
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* sd-netlink: permit RTM_DELLINK messages with no ifindex
This is useful for removing network interfaces by name.
* nspawn: explicitly remove veth links we created after use
Sometimes the kernel keeps veth links pinned after the namespace they have been
joined to died. Let's hence explicitly remove veth links after use.
Fixes: #2173
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Add a test for nss modules and some related fixes
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Throughout the tree there's spurious use of spaces separating ++ and --
operators from their respective operands. Make ++ and -- operator
consistent with the majority of existing uses; discard the spaces.
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The iftype is an unsigned short, and not just an unsigned.
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as such
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This should be handled fine now by .dir-locals.el, so need to carry that
stuff in every file.
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actually verify it
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Fixes: #2338
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networkd: Add support to configure VXLAN Port
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Now we dont have any public API that will support
any size . sd_netlink_message_append_data will support
this.
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nl->fd can be 0.
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GLIB has recently started to officially support the gcc cleanup
attribute in its public API, hence let's do the same for our APIs.
With this patch we'll define an xyz_unrefp() call for each public
xyz_unref() call, to make it easy to use inside a
__attribute__((cleanup())) expression. Then, all code is ported over to
make use of this.
The new calls are also documented in the man pages, with examples how to
use them (well, I only added docs where the _unref() call itself already
had docs, and the examples, only cover sd_bus_unrefp() and
sd_event_unrefp()).
This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we
tend to call our destructors these days.
Note that this defines no public macro that wraps gcc's attribute and
makes it easier to use. While I think it's our duty in the library to
make our stuff easy to use, I figure it's not our duty to make gcc's own
features easy to use on its own. Most likely, client code which wants to
make use of this should define its own:
#define _cleanup_(function) __attribute__((cleanup(function)))
Or similar, to make the gcc feature easier to use.
Making this logic public has the benefit that we can remove three header
files whose only purpose was to define these functions internally.
See #2008.
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This is a continuation of the previous include sort patch, which
only sorted for .c files.
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Sort the includes accoding to the new coding style.
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Add a few includes that we rely on to be include already.
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This way we do not rely on the size MAX* constants from the kernel headers, as these will
be out-of-sync in case we have old headers and new defines in missing.h.
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socket-util.[ch]
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There are more than enough to deserve their own .c file, hence move them
over.
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string-util.[ch]
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.
This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.
Also touches a few unrelated include files.
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Track the number of matches installed for a given multicast group, and leave the
group once no matches depend on it.
In order to handle passed-in sockets that are already members of multicast groups
we initialize the refcount based on the membership once we take over the socket.
This way we will leave the socket in the state we found it once we finish with
it.
On kernels that do not fully support reading out the multicast group membership
we fall back to never leaving any groups (as before).
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Also, explicitly don't support subscribing to GET or SET messages, as these will
never be emitted by the kernel.
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By default we set as NLM_F_CREATE | NLM_F_EXCL in
sd_rtnl_message_new_link
But incase of bridge we need to set NLM_F_REQUEST | NLM_F_ACK.
If NLM_F_EXCL is set then we are unable to set the parameters. As bridge
supports setting properties after creation not during creation.
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Rename rtnl_link_info_data_bridge_types to
rtnl_link_bridge_management_types
as they are of nested types of IFLA_AF_SPEC.
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Let's also clean up single-line while and for blocks.
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