The helper checks if the UEFI firmware is hooked up to a TPM2 chip. This
is useful to know in trusted boot scenarios, in particular during early
boot in auto-enroll scenarios where we want to know whether TPM2 is
available or not, and the Linux drivers are not loaded yet, and where it
might or not be worth waiting for it.
fsck: make sure we don't read an unitialized variable
This use on %n was completely unnecessary: fprintf returns the number of
characters written. And the issue was that if fprintf failed for whatever
reason, it would not process the %n and m would be unitialized. Rework the
code a bit to simplify it.
Coverity says:
CID 1446387 (#1 of 1): Bad bit shift operation (BAD_SHIFT)
8. negative_shift: In expression 1U << (int)cmd, shifting by a negative amount
has undefined behavior. The shift amount, cmd, is -22.
I don't think there's any issue, unless we forget to set token->data
appropriately. Let's add an assert.
Vinnie Magro [Fri, 29 Jan 2021 00:24:34 +0000 (16:24 -0800)]
networkd: add UseFQDN option for DHCPv6
Similar to DHCPv4's UseHostname option, add a UseFQDN config option in
[DHCPv6] to set the system's transient hostname if the FQDN option is
set in the DHCPv6 response from the server.
Let's use uint32_t everywhere to maintain the seqno, since that's what
the kernel does. Prviously in the reply_callback logic we used 64bit,
for no apparent reason.
Using 32bit also provides us with the benefit that we can avoid using
uint64_hash_ops, and can use trivial_hash_ops instead for the reply
hashmap, so that we can store the seqno in the key pointer directly.
While we are at it, let's make sure we never run into serial collisions
internally (32bit is a lot, but not that much), and let's put a limit on
outstanding serials, to catch programming errors.
I don't think it's realistic to operate without /proc/. Hence, let's
make this explicit.
If one day someone finds a way to do what we need without /proc/ we can
certainly drop this check again, but for now I think it's a lot
friendlier to users to make this explicitly early on instead continuing
to run and then not do what we need to do, oftentimes failing in cryptic
ways.
After all, invoking the tool without /proc/ is not an error that was
specific to some of the lines we process, but it's systematic error that
will show its ugly face in many codepaths down the line.
core: improve log message when unit deactivates cleanly
Whenever a unit deactivates sucessfully we so far generated a message
"unit xyz: succeeded". This is a bit confusing, since various unit types
cannot really "succeed", e.g. a device unit can't really "suceed", not
can a swap unit. In particular in the latter case people would probably
assume that a swap unit that "suceeded" would actually mean a swap was
active now, but the opposite is actually true.
Let's improve this by saying "Deactivated successfully", which hopefully
clears this up.
(I thought about saying "terminated" or "completed" or "finished" or so
instead, but that too doesn#t make sense if you think about unit types
like swaps or devices.)
Sergey Bugaev [Sat, 19 Dec 2020 18:00:22 +0000 (21:00 +0300)]
virt: detect Docker and Podman containers
Docker doesn't set $container, so it cannot be detected that way. Instead, we
check for presence of /.dockerinit, which it creates. Podman does set
$container, but some Red Hat images (in particular, Fedora images) override
$container to equal "oci". So to correctly detect Podman containers, we check
for presence of /run/.containerenv, which is created by Podman and is now the
official way to get information about the container from within the container.
Luca Boccassi [Mon, 1 Feb 2021 14:29:40 +0000 (14:29 +0000)]
portable: add 'reattach' verb and DBUS interface
Add 'reattach' verb to portablectl, and corresponding DBUS interface
to systemd-portabled.
Takes the same parameters as 'attach', but it will do a 'detach' (and
it will refuse to proceed if it cannot be done) first, matching on
the unversioned prefix of the new image. Eg:
portablectl reattach /tmp/foo_2.raw
will cause foo_1.raw to be detached, and foo_2.raw to be attached.
The key difference with a manual 'detach old' plus 'attach new' is that
the running units are not disturbed until after the attach completed,
and if --now is passed they are then restarted.
A 'detach' is not allowed normally if the units are running.
By using a restart-after-deploy method, 'reattach' allows for minimal
interruption of service and also for features that only work on restart
(eg: file descriptor store) to work as intended.
The DBUS interface returns two lists: first the removals from the detach
that were not immediately re-added in the attach, so that the caller
can stop the relevant units, and then the list of additions that are
either new or updates, so that the caller can restart/enable the
relevant units. portablectl already implements this with the existing
--now/--enable switches.
Frantisek Sumsal [Wed, 10 Feb 2021 09:16:09 +0000 (10:16 +0100)]
test: count call instructions as well
Binaries on the latest Arch Linux use `call` instructions instead of
`callq`, which breaks the ASan detection and eventually the image
building process (due to insufficient space).
resolved: rework a few functions to return early on error
The implementation is a bit ugly because we set the output variable
twice. But we were already doing this on error, so this is not
significantly worse. Doing this allows us to avoid goto's, and the
compiler should be able to figure this out and only set once.
We'd return -1 (-EPERM), even though we have a general rule to use real errno
values. The particular case that caught my attention was:
$ sudo udevadm control -l asdf
Failed to parse log priority 'asdf': Operation not permitted
... but "git grep 'r =.*_from_string' src/" return 110 hits. Confusingly, some
of the _from_string functions already return a proper errno value, so not all
of those are broken, but probably quite a few.
A hole was/is present after the booleans, so changing them to be one byte each
doesn't change the structure size (122 bits on amd64). If we add more stuff
later, it might make sense to turn some of those into bitfields again. For now,
let's take the easy route. EINVAL fits into type now.
Code size it minimally reduced:
-rwxrwxr-x 1 zbyszek zbyszek 4109792 Feb 10 14:00 build/libsystemd.so.0.30.0
-rwxrwxr-x 1 zbyszek zbyszek 4109712 Feb 10 14:01 build/libsystemd.so.0.30.0
sd-netlink: pahole optimization of sd_netlink_slot
By rearranging the fields, we can avoid one of the holes (on amd64).
By adding more space for .type, -EINVAL can be used as a value later on.
The structure is reduced from 96 to 88 bytes (on amd64).
Text size is also smaller:
-rwxrwxr-x 1 zbyszek zbyszek 4109832 Feb 9 19:50 build/libsystemd.so.0.30.0
-rwxrwxr-x 1 zbyszek zbyszek 4109792 Feb 9 19:51 build/libsystemd.so.0.30.0
Every bitfield may make the object a little smaller, but requires additional
code when accessing the field. So it only makes sense in objects that are
created in many many copies. The Manager is pretty much a singleton.
-rwxrwxr-x 1 zbyszek zbyszek 4443840 Feb 9 16:14 build/systemd
-rwxrwxr-x 1 zbyszek zbyszek 4442552 Feb 9 16:42 build/systemd
We save 1288 bytes of code by "wasting" a few bytes on storage. (The speed
advantages are probably more important, but harder to measure…)
Doing it all in one line and with negation in front seemed like a good
idea at some point, but I think it is vastly easier to understand when
it is split out a bit.
Let's use our table formatter for generating the coredump table. Bring
support up to our current standards, with a bit of color, JSON output
and so on.
Also adds supports for setting a max for the number of lines to
generate. (with the new -n switch)
The existing -1 switch now becomes a synonym for "-n 1 --reverse"
resolved: avoid NOTIMP error when looking up not supported requests
Some folks argue that NOTIMP should only be returned if a specific QTYPE
is not supported. While I don#t think the RFCs are too clear about that,
let's use REFUSED instead, which appears to be a less controversial
choice of error code.
resolved: add support for answering DNSSEC questions on the stub
This substantially beefs up the local DNS stub feature set in order to
allow local clients to do DNSSEC validation through the stub.
Previously we'd return NOTIMP if we'd get a DO or DO+CD lookup. With
this change we'll instead:
1. If we get DO+CD requests (i.e. DNSSEC with no local checking) we'll
proxy DNS queries and response mostly unmodified to/from upstream DNS
servers if possible (this is called "bypass" mode). We will patch in
new request IDs, (and patch them back out on reply), so that we can
sanely keep track of things. We'll also maintain a minimal local
cache for such lookups, always keeping the whole DNS packets in it
(if we reply from cache we'll patch the TTLs of all included RRs).
2. If we get DO requests without CD (i.e. DNSSEC with local checking)
we'll resolve and validate locally. In this mode we will not proxy
packets, but generate our own. We will however cache the combination
of answer RRs (along with their packet section assignments) we got
back in the cache, and use this information to generate reply packets
from the DNS stub.
In both cases: if we determine a lookup is to be answered from LLMNR or
mDNS we'll always revert to non-DNSSEC, non-proxy operation as before.
Answers will lack the DO bit then, since the data cannot be validated
via DNSSEC by the clients.
To make this logic more debuggable, this also adds query flags for
turning off RR sources. i.e. cache/network/zone/trust anchor/local
synthesis may now be disabled individually for each lookup.
The cache is substantially updated to make all this work: in addition to
caching simple RRs for lookup RR keys, we'll now cache the whole packets
and the whole combination of RRs, so that we can answer DO and DO+CD
replies sensibly according to the rules described above. This sounds
wasteful, but given that the
DnsResourceRecord/DnsResourceKey/DnsAnswer/DnsPacket
objects are all ref-counted and we try to merge references the actual
additional memory used should be limited (but this might be something to
optimize further later on).
To implement classic RR key lookups and new-style packet proxy lookups
(i.e. the ones necessary for DO+CD packet proxying, as described above)
DnsTransaction and DnsQuery objects now always maintain either a
DnsResourceKey/DnsQuestion as lookup key or a DnsPacket for "bypass"
mode.
resolved: if dns_packet_append_answer() fails count how many RRs were successfully added
This is useful later when handling the truncation case: if we can't add
all RRs we'd like to add we need to set the TC bit, but still report the
number of RRs we added (and not the number of RRs we would have liked to
add) to the packet.
resolved: add new DnsAnswerFlags indicating originating section when parsing
Let's beef up our parser a bit: let's store in the DnsAnswerFlags field
(that is stored as part of DnsAnswerItem) which DNS packet section (i.e.
answer, authoritative, additional) an RR originates from.
This is useful when propagating answers from an upstream DNS server
eventually, as we can place the data in the right sections downstream
too.
resolved: replace DNS_ANSWER_FOREACH_FULL() iterator macro with DNS_ANSWER_FOREACH_ITEM()
The more fields DnsAnswerItem gains the less sense it makes to pass
every field of it as separate parameter to an iterator macro. Let's
simplify things here, in preparation of adding more fields to the
structure later on: let's just return the structure itself in the loop,
rather than the individual fields.
resolved: introduce dns_transaction_key() helper for getting RR key for transaction
This is a simple search&replace excercise: instead of accessing the
"key" field of the transaction directly, let's use a small inline helper
that does this for us.
This appears pointless for now, but this will become useful later when
we introduce "bypass" transactions, that reuse the original client DNS
packet for queries instead of synthesizing a packet of our own. In that
case transactions either have regular "key" field initialized as before,
or the "bypass" packet field instead. The new dns_transaction_key()
helper allows us to hide the differences for most cases as we can later
teach it to access the "bypass" packet's question key transparently.
systemd-inhibit when invoked with a command line will put the whole
command line in the "who" field of the inhibitor lock. This can get
extremely long for shell expressions, making the table "systemd-inhibit
--list" shows ridiculously weirdly formatted. Let's put a limit on the
column width: half of the screen, not more.
format-table: don't hit assert if column got less width than it asked for
If one field in a specific column has a maximum size limit, other fields
in the same column might affected by it and get less than they asked
for. Let's make sure we can handle this, and don't assert on this
because surprisingly we got less than what we asked for.
Does what the name suggests. Obviously inspired by sudoers, but note that
our tools are not supposed to be installed suid, so there is no privilege
boundary to cross here.
fuzz-journal-remote: do not assert on resource conditions
We have a number of issues where oss-fuzz reports input-independent crashes of
fuzz-journal-remote. Instead of asserting that stuff that allocated fds and
memory never fails, let's instead just return an error.
I don't see any docs as to whether LLVMFuzzerTestOneInput() is allowed to
return non-zero. Propagating the error code is easiest, so let's just do that.
If it turns out that this causes oss-fuzz to still report a failure, we can
suppress that later.
ci: temporarily pin Arch repositories to glibc 2.32-5
glibc 2.33-3 shipped on 2021-02-06 breaks running Arch containers on
systems with older kernels (like Ubuntu Focal). Until the issue is
resolved, let's pin the Arch repositories to glibc 2.32-5 to mitigate
the annoying CI fails.
network: Delay addition of IPv6 Proxy NDP addresses
Setting of IPv6 Proxy NDP addresses must be done at the same
time as static addresses, static routes, and other link attributes
that must be configured when the link is up. Doing this ensures
that they are reconfigured on the link if the link goes down
and returns to service.
Yu Watanabe [Wed, 3 Feb 2021 18:21:08 +0000 (03:21 +0900)]
fundamental: move several macros and functions into src/fundamental/
sd-boot has a copy of a subset of codes from libbasic. This makes
sd-boot share the code with libbasic, and dedup the code.
Note, startswith_no_case() is dropped from sd-boot, as
- it is not used,
- the previous implementation is not correct,
- gnu-efi does not have StrniCmp() or so.
projects / thirdparty / systemd.git / log
