Internally, the root cgroup is stored as the empty string in
Unit.cgroup_path, and "no cgroup" as NULL. Unfortunately, D-Bus does not
know a NULL concept, hence when reporting the cgroup to clients we
should turn the root cgroup into "/", and leave the empty string for the
"no cgroup" case.
This should make sure that "systemctl status -- -.slice" works correctly
and shows the entire cgroup tree.
resolved: make packet flags logic more expressive again
This partially reverts 106784ebb7b303ae471851100a773ad2aebf5b80, ad
readds separate DNS_PACKET_MAKE_FLAGS() invocations for the LLMNR and
DNS case. This is important since SOme flags have different names and
meanings on LLMNR and on DNS and we should clarify that via the comments
and how we put things together.
This hopefully makes this a bit more expressive and clarifies that the
fd is not used for the DNS TCP socket. This also mimics how the LLMNR
UDP fd is named in the manager object.
Daniel Mack [Tue, 4 Aug 2015 11:53:02 +0000 (13:53 +0200)]
resolved: allow dns_cache_put() without a question
Currently, dns_cache_put() does a number of things:
1) It unconditionally removes all keys contained in the passed
question before adding keys from the newly arrived answers.
2) It puts positive entries into the cache for all RRs contained
in the answer.
3) It creates negative entries in the cache for all keys in the
question that are not answered.
Allow passing q = NULL in the parameters and skip 1) and 3), so
we can use that function for mDNS responses. In this case, the
question is irrelevant, we are interested in all answers we got.
Jan Synacek [Mon, 24 Aug 2015 12:54:22 +0000 (14:54 +0200)]
logind/systemctl: introduce SetWallMessage and --message
Enable unprivileged users to set wall message on a shutdown
operation. When the message is set via the --message option,
it is logged together with the default shutdown message.
resolved: change error code when trying to resolve direct LLMNR PTR RRs
If we try to resoolve an LLMNR PTR RR we shall connect via TCP directly
to the specified IP address. We already refuse to do this if the address
to resolve is of a different address family as the transaction's scope.
The error returned was EAFNOSUPPORT. Let's change this to ESRCH which is
how we indicate "not server available" when connecting for LLMNR or DNS,
since that's what this really is: we have no server we could connect to
in this address family.
This allows us to ensure that no server errors are always handled the same
way.
resolve-host: support parsing numeric interface names
If the user specifies an interface by its ifindex we should handle this
nicely. Hence let's try to parse the ifindex as a number before we try
to resolve it as an interface name.
resolved: remove duplicate handling of "no servers" query result
So far we handled immediate "no server" query results differently from
"no server" results we ran into during operation: the former would cause
the dns_query_go() call to fail with ESRCH, the later would result in
the query completion callback to be called.
Remove the duplicate codepaths, by always going through the completion
callback. This allows us to remove quite a number of lines for handling
the ESRCH.
Right now we keep track of ongoing transactions in a linked listed for
each scope. Replace this by a hashmap that is indexed by the RR key.
Given that all ongoing transactions will be placed in pretty much the
same scopes usually this should optimize behaviour.
We used to require a list here, since we wanted to do "superset" query
checks, but this became obsolete since transactions are now single-key
instead of multi-key.
Introduce separate actions for creating login or shell sessions for
the local host or a local container. By default allow local unprivileged
clients to create new login sessions (which is safe, since getty will
ask for username and authentication).
Also, imply login privs from shell privs, as well as shell and login
privs from manage privs.
systemctl: properly handle empty control group paths in "status"
When showing the status of the "-.slice" slice root unit (whose reported
cgroup path is ""), we suppressed the cgroup tree so far, because
skipped it for all unit with an empty cgroup path. Let's fix that, and
properly handle the empty cgroup path.
machinectl: don't show ".host" pseudo-machine in list by default
Let's hide all machines whose name begins with "." by default, thus
hiding the ".host" pseudo-machine, unless --all is specified. This
takes inspiration from the ".host" image handling in "machinectl
list-images" which also hides all images whose name starts with ".".
machined: introduce pseudo-machine ".host" refererring to the host system
Some of the operations machined/machinectl implement are also very
useful when applied to the host system (such as machinectl login,
machinectl shell or machinectl status), hence introduce a pseudo-machine
by the name of ".host" in machined that refers to the host system, and
may be used top execute operations on the host system with.
This copies the pseudo-image ".host" machined already implements for
image related commands.
(This commit also adds a PK privilege for opening a PTY in a container,
which was previously not accessible for non-root.)
util: make machine_name_is_valid() a macro and move it to hostname-util.h
As it turns out machine_name_is_valid() does the exact same thing as
hostname_is_valid() these days, as it just invoked that and checked the
name length was < 64. However, hostname_is_valid() checks the length
against HOST_NAME_MAX anyway (which is 64 on Linux), hence any
additional check is redundant.
We hence replace machine_name_is_valid() by a macro that simply maps it
to hostname_is_valid() but sets the allow_trailing_dot parameter to
false. We also move this this call to hostname-util.h, to the same place
as the hostname_is_valid() declaration.
When looking for the machine belonging to a PID, always look for the
leader first, only then fall back to a cgroup check. We keep direct
track of the leader PID, but only indirectly of the cgroup, hence prefer
the PID.
This new bus call opens an interactive shell in a container. It works
like the existing OpenLogin() call, but does not involve getty, and
instead opens an arbitrary command line.
This is similar to "systemd-run -t -M" but is controlled by a specific
PolicyKit privilege.
core: optionally create LOGIN_PROCESS or USER_PROCESS utmp entries
When generating utmp/wtmp entries, optionally add both LOGIN_PROCESS and
INIT_PROCESS entries or even all three of LOGIN_PROCESS, INIT_PROCESS
and USER_PROCESS entries, instead of just a single INIT_PROCESS entry.
With this change systemd may be used to not only invoke a getty directly
in a SysV-compliant way but alternatively also a login(1) implementation
or even forego getty and login entirely, and invoke arbitrary shells in
a way that they appear in who(1) or w(1).
This is preparation for a later commit that adds a "machinectl shell"
operation to invoke a shell in a container, in a way that is compatible
with who(1) and w(1).
David Herrmann [Mon, 24 Aug 2015 11:41:03 +0000 (13:41 +0200)]
sd-bus: don't list activators as proper peers
If a connection passed KDBUS_HELLO_ACTIVATOR, it cannot do I/O on the
bus. Hence, we should not treat it as proper peer. To actually query it,
you have to explicitly ask for activators.
This makes kdbus in-line with what dbus-daemon does.
David Herrmann [Mon, 24 Aug 2015 10:56:37 +0000 (12:56 +0200)]
Revert "sd-bus: include queried path in GetManagedObjects"
This reverts commit 92d16a53e385781a55d9231d9f8f89c1747ab0e4. As it turns
out, this is not how ObjectManager is supposed to work. It is just a
special behavior of BlueZ, but no-one else implements it this way.
Revert the patch as discussed on github, and as such revert to the
previous behavior (as described in the spec).
sd-device: fix enumeration of devices without subsystem
Prior to commit c32eb440bab953a0169cd207dfef5cad16dfb340, libudev's
function udev_enumerate_scan_devices() had behaved differently. If
parent match was added with udev_enumerate_add_match_parent(),
udev_enumerate_scan_devices() did not return error if some child devices
had no subsystem symlink in sysfs. An example of such devices is USB
endpoints /sys/bus/usb/devices/*/ep_*. If there was a parent match
against USB device, old implementation of udev_enumerate_scan_devices()
did not treat ep_* device directories without subsystem symlink as error
and just ignored them, but new implementation returns -ENOENT (also
ignoring these devices) though correctly enumerates all other matching
devices.
if (!match_subsystem(enumerate, udev_device_get_subsystem(dev)))
goto nomatch;
udev_device_get_subsystem() was returning NULL, match_subsystem() was
returning false, and USB endpoint device was ignored.
New parent_add_child() from src/libsystemd/sd-device/device-enumerator.c
checks return value of sd_device_get_subsystem() and fails if subsystem
was not found. Absence of subsystem symlink should not be really treated
as error because all enumerations of children of USB devices will fail
with -ENOENT. This new behavior also breaks system-config-printer.
So restore old behavior and treat absence of subsystem symlink as no
match.
resolved: only maintain one question RR key per transaction
Let's simplify things and only maintain a single RR key per transaction
object, instead of a full DnsQuestion. Unicast DNS and LLMNR don't
support multiple questions per packet anway, and Multicast DNS suggests
coalescing questions beyond a single dns query, across the whole system.
resolved: add extra check for family when doing LLMNR TCP connections
It shouldn't happen that we try to resolve IPv4 addresses via LLMNR on
IPv6 and vice versa, but let's explicitly verify that we don't turn an
IPv4 LLMNR lookup into an IPv6 TCP connection.
resolved: when passing RRs across the bus, make sure not to use name compression
We explicitly need to turn off name compression when marshalling or
demarshalling RRs for bus transfer, since they otherwise refer to packet
offsets that reference packets that are not transmitted themselves.
With this change we'll now also generate synthesized RRs for the local
LLMNR hostname (first label of system hostname), the local mDNS hostname
(first label of system hostname suffixed with .local), the "gateway"
hostname and all the reverse PTRs. This hence takes over part of what
nss-myhostname already implemented.
Local hostnames resolve to the set of local IP addresses. Since the
addresses are possibly on different interfaces it is necessary to change
the internal DnsAnswer object to track per-RR interface indexes, and to
change the bus API to always return the interface per-address rather than
per-reply. This change also patches the existing clients for resolved
accordingly (nss-resolve + systemd-resolve-host).
This also changes the routing logic for queries slightly: we now ensure
that the local hostname is never resolved via LLMNR, thus making it
trustable on the local system.
hostname-util: introduce new is_gateway_hostname() call
This moves is_gateway() from nss-myhostname into the basic APIs, and
makes it more like is_localhost(). Also, we rename it to
is_gateway_hostname() to make it more expressive.
Sharing this function in src/basic/ allows us to reuse the function for
routing name requests in resolved (in a later commit).
test-dhcp6-client: Add tests for DNS and NTP options
Test option setting and getting in test_advertise_option(). Verify
that the information provided in DHCPv6 Reply messages is also
available in the Information and Solicit callbacks.
sd-dhcp6: Support deprecated SNTP Configuration Option
Although the SNTP option specified in RFC 4075 has been deprecated, some
servers are still sending NTP information with this option. Use the SNTP
information provided only if the NTP option is not present.
Update the test case as SNTP information is also requested.
sd-dhcp6: Add support for DHCPv6 DNS Domain Search List option
Support DHCPv6 DNS search list option as specified in RFC 3646. This
option contains a list of DNS search domains encoded without compression
as specified in Section 8. of RFC 3315.
Patrik Flykt [Mon, 4 May 2015 10:23:46 +0000 (13:23 +0300)]
dhcp6-option: Add helper function for uncompressed domain names
Add a helper function containing a modified version of dns_packet_read_name()
that does not use DnsPacket to extract a string array of domain names from
the provided option data. The domain names are stored uncompressed as defined
in Section 8. of RFC 3315.
sd-dhcp6-client: Fix unreferencing DHCPv6 lease on client reset
When the DHCPv6 client is started by the library user or stopped for
any reason, unref the DHCPv6 lease when resetting the DHCPv6 client
data structure. This makes the DHCPv6 client always start from a clean
state and not keep unnecessary an lease structure around when stopped.
If this is not done, a previously existing lease information can be
interpreted to be from another server when restarting DHCPv6.
projects / thirdparty / systemd.git / log
