Let's shutdown the write end and wait for EOF from the other side
before continuing to make sure that the receiver has received all
data we sent on the socket.
We're still seeing problems in mkosi CI where we lose notify messages
sent over vsock from virtual machines because the virtual machine shuts
down before the socket buffers are flushed.
Let's try setting SO_LINGER on vsock sockets so that the kernel waits
until the buffers are flushed when we close the file descriptor.
To make sure it works, let's get rid of our previous workaround that
sends EXIT_STATUS earlier to reduce the chance of it not arriving.
This way, if it doesn't work, we'll notice it immediately due to CI
failures.
When an IO event source owns relevant fd, replacing with a new fd leaks
the previously assigned fd.
===
sd_event_add_io(event, &s, fd, ...);
sd_event_source_set_io_fd_own(s, true);
sd_event_source_set_io_fd(s, new_fd); <-- The previous fd is not closed.
sd_event_source_unref(s); <-- new_fd is closed as expected.
===
Without the change, valgrind reports the leak:
==998589==
==998589== FILE DESCRIPTORS: 4 open (3 std) at exit.
==998589== Open file descriptor 4:
==998589== at 0x4F119AB: pipe2 (in /usr/lib64/libc.so.6)
==998589== by 0x408830: test_sd_event_source_set_io_fd (test-event.c:862)
==998589== by 0x403302: run_test_table (tests.h:171)
==998589== by 0x408E31: main (test-event.c:935)
==998589==
==998589==
==998589== HEAP SUMMARY:
==998589== in use at exit: 0 bytes in 0 blocks
==998589== total heap usage: 33,305 allocs, 33,305 frees, 1,283,581 bytes allocated
==998589==
==998589== All heap blocks were freed -- no leaks are possible
==998589==
==998589== For lists of detected and suppressed errors, rerun with: -s
==998589== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
I'm working on the transition to merged sbin in Fedora. While the transition is
happening (and probably for a while after), we need to compile systemd with
split-bin=true to support systems upgraded from previous versions. But when the
system has been upgraded and already has /usr/sbin that is a symlink, be nice
and give $PATH without sbin.
We check for both /usr/sbin and /usr/local/sbin. If either exists and is not a
symlink to ./bin, we retain previous behaviour. This means that if both are
converted, we get the same behaviour as split-bin=false, and otherwise we
get the same behaviour as before.
sd-path uses the same logic. This is not a hot path, so I got rid of the nulstr
macros that duplicated the logic.
This happens when journal is rotated after a data is written but before
an entry that linked to the data is not written yet.
This is neither data corruption, nor program error. Let's downgrade the
log level.
Closes#32153.
Follow-ups for 74c4231ce5.
Previously, the path is obtained from the fd, but it is closed in
sd_event_loop() to unpin the filesystem.
So, let's save the path when the event source is created, and make
sd_event_source_get_inotify_path() simply read it.
In many of our internal functions that take a pointer + a size we have
introduced the rule that SIZE_MAX as size means: take strlen().
sd_journal_add_match() has something similar, but the special value is
0, not SIZE_MAX. This is a bit ugly, since a zero size data block is
theoretically fine. The only reason sd_journal_add_match() gets away
with using this special value is because valid matches must consist of
at least 2 chars, hence cannot be zero.
But let's make this more robust and less surprising when compared to the
rest of our code, and *also* accept SIZE_MAX to mean strlen().
No actual code changes, just some clean-up.
The linux/ headers include linux/libc-compat.h that makes sure the
linux/ headers won't redeclare symbols already declared by net/if.h, but
glibc's net/if.h doesn't do that, so if the include order is reversed
we'll end up with a bunch of errors about redeclared stuff:
[3/519] Compiling C object test-network-tables.p/src_network_test-network-tables.c.o
FAILED: test-network-tables.p/src_network_test-network-tables.c.o
cc -Itest-network-tables.p -I. -I.. -Isrc/basic -I../src/basic -Isrc/fundamental -I../src/fundamental -Isrc/systemd -I../src/systemd -I../src/libsystemd/sd-bus -I../src/libsystemd/sd-device -I../src/libsystemd/sd-event -I../src/libsystemd/sd-hwdb -I../src/libsystemd/sd-id128 -I../src/libsystemd/sd-journal -I../src/libsystemd/sd-netlink -I../src/libsystemd/sd-network -I../src/libsystemd/sd-resolve -Isrc/shared -I../src/shared -Isrc/libsystemd-network -I../src/libsystemd-network -Isrc/network -I../src/network -I../src/network/netdev -I../src/network/tc -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -std=gnu11 -O0 -g -Wno-missing-field-initializers -Wno-unused-parameter -Wno-nonnull-compare -Warray-bounds -Warray-bounds=2 -Wdate-time -Wendif-labels -Werror=format=2 -Werror=format-signedness -Werror=implicit-function-declaration -Werror=implicit-int -Werror=incompatible-pointer-types -Werror=int-conversion -Werror=missing-declarations -Werror=missing-prototypes -Werror=overflow -Werror=override-init -Werror=return-type -Werror=shift-count-overflow -Werror=shift-overflow=2 -Werror=strict-flex-arrays -Werror=undef -Wfloat-equal -Wimplicit-fallthrough=5 -Winit-self -Wlogical-op -Wmissing-include-dirs -Wmissing-noreturn -Wnested-externs -Wold-style-definition -Wpointer-arith -Wredundant-decls -Wshadow -Wstrict-aliasing=2 -Wstrict-prototypes -Wsuggest-attribute=noreturn -Wunused-function -Wwrite-strings -Wzero-length-bounds -fdiagnostics-show-option -fno-common -fstack-protector -fstack-protector-strong -fstrict-flex-arrays --param=ssp-buffer-size=4 -Wno-unused-result -Werror=shadow -fno-strict-aliasing -fstrict-flex-arrays=1 -fvisibility=hidden -fno-omit-frame-pointer -include config.h -pthread -DTEST_CODE=1 -MD -MQ test-network-tables.p/src_network_test-network-tables.c.o -MF test-network-tables.p/src_network_test-network-tables.c.o.d -o test-network-tables.p/src_network_test-network-tables.c.o -c ../src/network/test-network-tables.c
In file included from ../src/basic/linux/if_bonding.h:47,
from ../src/network/netdev/bond.h:5,
from ../src/network/test-network-tables.c:3:
../src/basic/linux/if.h:111:41: error: redeclaration of enumerator ‘IFF_UP’
111 | #define IFF_UP IFF_UP
| ^~~~~~
../src/basic/linux/if.h:84:9: note: previous definition of ‘IFF_UP’ with type ‘enum net_device_flags’
84 | IFF_UP = 1<<0, /* sysfs */
| ^~~~~~
../src/basic/linux/if.h:112:41: error: redeclaration of enumerator ‘IFF_BROADCAST’
112 | #define IFF_BROADCAST IFF_BROADCAST
| ^~~~~~~~~~~~~
...
This also drops remaining workarounds from the last time this issue was
brought up (6f270e6bd8) since they shouldn't be needed anymore if the
order of the includes is the "correct" one. I also added a comment to
each affected include when this is inevitably encountered again in the
future.
Resolves: #32160
With gcc-14.0.1-0.13.fc40, when compiling with -O2, the compiler doesn't understand
that sd_bus_error_setf() always returns negative on error when <name> is provided:
[28/576] Compiling C object systemd-resolved.p/src_resolve_resolved-bus.c.o
../src/resolve/resolved-bus.c: In function ‘call_link_method’:
../src/resolve/resolved-bus.c:1763:16: warning: ‘l’ may be used uninitialized [-Wmaybe-uninitialized]
1763 | return handler(message, l, error);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
../src/resolve/resolved-bus.c:1749:15: note: ‘l’ was declared here
1749 | Link *l;
| ^
../src/resolve/resolved-bus.c: In function ‘bus_method_get_link’:
../src/resolve/resolved-bus.c:1822:13: warning: ‘l’ may be used uninitialized [-Wmaybe-uninitialized]
1822 | p = link_bus_path(l);
| ^~~~~~~~~~~~~~~~
../src/resolve/resolved-bus.c:1810:15: note: ‘l’ was declared here
1810 | Link *l;
| ^
...
Let's make the assertion a bit more explicit. With this, the warning goes away,
but I think it's more obvious to a human reader too.
The man page says that the variable will be unset even if the call fails.
But we weren't consistent: for some errors we would return early. This
is not good, because based on the man page, the caller may use just print
a warning, or even use '(void) sd_notify(…)' for the call.
gcrypt is used only for journal sealing operations in libsystemd, so it
can be made into a dlopen dependency that is used only on demand. This
allows to reduce the footprint of libsystemd in the most common cases.
Keep systemd-pull and systemd-resolved with normal linking, as they are
executables, and usually built with OpenSSL support anyway.
And rename it to id128_get_boot_for_machine().
This also splits out id128_get_boot() from sd_id128_get_boot(), and
make id128_get_boot_for_machine() use it.
device_open_from_devnum() returns two things: the devname via
an output param, and the fd via the return value. Rename the param
to signal that it's not the only return channel.
Dynamically load liblz4, libzstd and liblzma with dlopen().
This helps to reduce the size of the initrd image when these libraries
are not really needed.
For the very similar case of the product UUID we have its own error
BUS_ERROR_NO_PRODUCT_UUID if we have no UUID. Let's mirror this for the
hardware serial, and expose the same, to keep things nicely symmteric.
The glibc API is behind the wrapper is called "secure_getenv()", hence
our wrapper really should keep the order too, otherwise things are just
too confusing.
Allow to set the broadcast queueing threshold
on macvlan devices. This controls which multicast packets will be
processed in a workqueue instead of inline.
Mike Yuan
Dmitry V. Levin
Daan De Meyer
Luca Boccassi
Yu Watanabe
Zbigniew Jędrzejewski-Szmek
Lennart Poettering
Frantisek Sumsal
Antonio Alvarez Feijoo
SidhuRupinderandFrantisek Sumsal
Matteo Croce
Susant Sahani