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"Notifications are of informal nature and no reply is expected, therefore the
sequence number is typically set to 0."[1]
If networkd is started soon after recent netlink activity, then there
will be messages with sequence number 0 in the buffer.
The first thing networkd does is to request a dump of all the links. If
it uses sequence number 0 for this, then it may confuse the dump request's
response with that of a notification.
This will result in it failing to properly enumerate all the links,
but more importantly, when it comes to enumerate all the addresses, it
will still have the link dump in progress, so the address enumeration
will fail with -EBUSY.
[1]: http://www.infradead.org/~tgr/libnl/doc/core.html#core_msg_types
[tomegun: sequence -> serial]
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If we receive an sd_bus_message from the kernel, m->kdbus will contain
additional items that cannot be used when sending a message. Therefore,
always remarshal the message if it is used again.
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This assignment is already done in the parent context, no need to do it
again.
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Usually when using loop_read(), we want to read the full buffer.
Add a helper that mirrors loop_write(), and returns 0 when full buffer
was read, and an error otherwise.
Use -ENODATA for the short read, to distinguish it from a read error.
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CID #1271349.
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Currently the code will silently blank out events if there are more
then 512 epoll events, causing them never to be handled at all. This
patch removes the cap on the number of events for epoll_wait, thereby
avoiding this issue.
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https://bugs.freedesktop.org/show_bug.cgi?id=89379
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After some reconsideration, we decided to move the binary protocol
back to 64-bit wide UIDs and GIDs. After all, it should be possible
to redefine [gu]id_t to uint64_t and things should continue to
work. As we want to avoid such data types in kdbus.h, let's move
back to 64-bit values and be safe.
In sd-bus, we have to do a translation between uint64_t and gid_t
now for supplementary gids.
Some inline comments have also been updated in kdbus upstream.
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Introduce BindCarrier= to indicate the set of links that determine if
the current link should be brought UP or DOWN.
[tomegun: add a bit to commit message]
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Spotted by Thomas H.P. Andersen <phomes@gmail.com>
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The kernel part of kdbus does not allow userspace to make any assumption on
which unique address the first user on the bus will get.
Instead, use sd_bus_get_unique_name() to get the server's address.
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Follow two small changes in the kdbus API:
* Flags are now returned in cmd->return_flags by KDBUS_CMD_NAME_ACQUIRE
* struct kdbus_item_list has been dropped. The information stored in
this struct was redundant since awhile already, as all commands
report their returned slice size anyway.
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This change exposed a bug in kernel headers:
/usr/include/linux/if_bridge.h:184:20: error: field 'ip6' has incomplete type
struct in6_addr ip6;
^
/usr/include/linux/if_tunnel.h:76:19: error: field 'prefix' has incomplete type
struct in6_addr prefix;
^
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Include <sys/socket.h> from util.h and bus-message.h in order to
build errors like the ones below on kdbus enabled systems.
./src/shared/util.h:976:32: warning: its scope is only this definition or declaration, which is probably not what you want
In file included from src/libsystemd/sd-bus/bus-kernel.c:37:0:
./src/shared/util.h:1081:28: warning: 'struct msghdr' declared inside parameter list
void cmsg_close_all(struct msghdr *mh);
^
CC src/libsystemd/sd-bus/libsystemd_la-bus-creds.lo
In file included from src/libsystemd/sd-bus/bus-creds.c:25:0:
./src/shared/util.h:976:32: warning: 'struct ucred' declared inside parameter list
int getpeercred(int fd, struct ucred *ucred);
^
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This patch removes includes that are not used. The removals were found with
include-what-you-use which checks if any of the symbols from a header is
in use.
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This syncs up the new KDBUS_CMD_CONN_INFO behavior:
- attach-flags are passed in .attach_flags, instead of directly merged
with the command flags.
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Also, allow clients to alter their own objects without any further
priviliges. i.e. this allows clients to kill and lock their own sessions
without involving PK.
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"allow-interactive-authentication" message flag
Most of our client tools want to set this bit for all their method
calls, even though it defaults to off in sd-bus, and rightfully so.
Hence, to simplify thing, introduce a per sd_bus-object flag that sets
the default value for all messages created on the connection.
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Pull in new kdbus changes, namely:
- EOVERFLOW is replaces by KDBUS_RECV_RETURN_DROPPED_MSGS
- ENOMSG is merged with EAGAIN for consistency
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We should never put any constraints on the IDs returned by the kernel. Use
sd_bus_get_unique_name() to retrieve the ID of a peer.
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and 32bit on dbus1
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their entirety as gvariant objects""
This reverts commit 954871d8ba15911d014f76ed2c7a9492953cf39d.
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sd_event_wait() returning 0 usually means that it timed out, which means it must
have been idle. However, sd_event_wait() may return 0 in case an event was triggered
but it turned out there was nothing to do. Make the check for idle explicit to avoid
this edge-case.
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Another slice logic rework in kdbus made KDBUS_ITEM_PAYLOAD_OFF items
relative to the message header again. Catch up with that in sd-bus.
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include-what-you-use automatically does this and it makes finding
unnecessary harder to spot. The only content of poll.h is a include
of sys/poll.h so should be harmless.
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This fixes various issues found by globally reordering the include
sections of all .c files.
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This reverts commit d6d810fbf8071f8510450dbacd1d083f37603656.
It's apparently not OK to pass MSG_CMSG_CLOEXEC to recvmsg() of raw
sockets.
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Also, document in adjacent comments and in CODING_STYLE why we do that.
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Got this one wrong, it is not a union, just a nested container.
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So far we only supported selecting them by sibling attributes.
(This stuff is all a bit crazy, but there seems to be no other way...)
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Still parse the CMSG data, and most importantly make sure we drop the message when peeking.
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causes EOF. Seems like a kernel bug. Ignoring it seems to work be the best we
can do for now...
See https://bugs.freedesktop.org/show_bug.cgi?id=88397
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After all it is now much more like strjoin() than strappend(). At the
same time, add support for NULL sentinels, even if they are normally not
necessary.
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Still keep the non-socket activation code around for starting from the commandline, but
will likely drop that too in the future.
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In both cases exit the event loop.
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If we scale our buffer to be wide enough for the format string, we
should expect that the calculation was correct.
char_array_0() invocations are removed, since snprintf nul-terminates
the output in any case.
A similar wrapper is used for strftime calls, but only in timedatectl.c.
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As in sd-bus, simply log at debug level when a callback fails, but don't fail the event handler.
Otherwise any error returned by any callback will disable the rtnl event handler. We should
only do that on serious internal errors in sd-rtnl that we know cannot be recovered from.
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entirety as gvariant objects"
This breaks booting with kdbus.
This reverts commit b381de4197157748ed96e469fcc372c23f842ae1.
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