Then, move syscall definitions to the wrapper, and prototypes are moved
to relevant headers.
This also adds checks for add_key() and request_key(), as one day
glibc may be going to add some of them separatedly.
The check for fspick in meson.build is dropped, as it is currently
unused in our code.
This also moves
- basic/missing_bpf.h -> include/override/linux/bpf.h,
- basic/missing_keyctl.h -> include/override/linux/keyctl.h.
git grep -l 'Failed to open /'|xargs sed -r -i 's|"Failed to open (/[^ ]+): %m"|"Failed to open %s: %m", "\1"|g'
git grep -l $'Failed to open \'/'|xargs sed -r -i $'s|"Failed to open \'(/[^ ]+)\': %m"|"Failed to open %s: %m", "\\1"|g'
git grep -l "Failed to open /"|xargs sed -r -i $'s|"Failed to open (/[^ ]+), ignoring: %m"|"Failed to open %s, ignoring: %m", "\\1"|g'
+ some manual fixups.
These are built from the same sources as the regular binaries, so we
end up with the same sources multiple times in the compilation database
but with different command line arguments, which trips up tooling that
uses the compilation database. Let's not define the standalone targets if
the option is not enabled to avoid this problem.
Also, let's deflatten the lists of sources in preparation for the
next commit at the same time.
In systemctl, we split out systemctl-main.c to make sure the definition
of main() is in a separate object which allows us to extract the systemctl.c
object and link it in the fuzzer target without getting a multiple definition
error when linking.
Currently, when we want to add unit tests for code that is compiled into
an executable, we either compile the code at least twice (once for the
executable, and once for each test that uses it) or we create a static
library which is then used by both the executable and all the tests.
Both of these options are not ideal, compiling source files more than
once slows down the build for no reason and creating the intermediate
static libraries takes a lot of boilerplate.
Instead, let's use the extract_objects() method that meson exposes on
build targets. This allows us to extract the objects corresponding to
specific source files and use them in other executables. Because we
define all executables upfront into a dictionary, we integrate this into
the dictionary approach by adding two new fields:
- 'extract' takes a list of files for which objects should be extracted.
The extracted objects are stored in a dict keyed by the executable name
from which they were extracted.
- 'objects' takes the name of an executable from which the extracted
objects should be added to the current executable.
One side effect of this approach is that we can't build test executables
anymore without building the main executable, so we stop building test
executables unless we're also building the main executable. This allows
us to switch to using subdir_done() in all of these subdirectories to skip
parsing them if the corresponding component is disabled.
These changes get me down from 2439 => 2403 ninja targets on a full rebuild
from scratch.
Now that the necessary functions from log.h have been moved to macro.h,
we can stop including log.h in macro.h. This requires modifying source
files all over the tree to include log.h instead.
Let's gracefully handle cases where a device disappears in the time we
between our discovery and when we want to detach it, due to "auto-clear"
or a similar logic.
The loopback case already handled this quite OK, do the same for MD and
swap too.
Switch to ERRNO_IS_DEVICE_ABSENT() for all checks, just in case.
Also improve debug logging for all these cases, so we know exactly what
is going on.
This is inspired by #37160, but shouldn't really fix anything there, I
am pretty sure the ENODEV seen in that output stems from the STOP_ARRAY
call, not from the open().
Note that this does not change anything for the device mapper case,
because the DM subsystem does not return useful error codes to
userspace, hence everything is a complete mess there.
This introduce LOG_ITEM() macro that checks arbitrary formats in
log_struct().
Then, drop _printf_ attribute from log_struct_internal(), as it does not
help so much, and compiler checked only the first format string.
Hopefully, this silences false-positive warnings by Coverity.
If a network mount returns EBUSY on umount, the logic introduced in
6dc68a00cf causes shutdown to hang indefinitely on
`fstatat()` (i.e., within `is_dir(m->path, true)`). Hence, skip this logic for
network mounts (following the same motivation we use to skip read-only mounts in
this kind of file systems).
Fixes 6dc68a00cf
This introduces libmount_parse_mountinfo() and libmount_parse_with_utab().
The former one parses only mountinfo, but the latter one also parse
utab. Hopefully this avoids pitfalls like issue #35949.
Our variables for internal libraries are named 'libfoo' for the shared lib
variant, and 'libfoo_static' for the static lib variant. The only exception was
libbasic, because we didn't have a shared variant for it. But let's rename it
for consitency. This makes the build config easier to understand.
Otherwise we'll close the device disarming it as side-effect of
watchdog_free_device(), which is not intended. Hence, let's close the fd
first explicitly leaving it armed.
Fixes: #33075
Nowadays the tmpfs where the final shutdown phase
is initiated has got its own name.
Plus, "Returning to initrd" sounds spurious anyway,
as we're not returning to the initial root tmpfs
as seen by the kernel.
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.
There's a race condition where the EXIT_STATUS= message we send
just before shutting down the VM doesn't arrive on the host,
presumably because the VM is shut down before the kernel has had a
chance to forward the message to the host.
Since there's no obvious way to wait until the message has been
flushed to the host, let's send the message before we execute the
final sync() instead of after executing the final sync(). In my
testing, this seems to either guarantee the message is sent or
introduces sufficient delay that the kernel always has time to flush
its socket buffers to the host.
We use it for more than just pipe() arrays. For example also for
socketpair(). Hence let's give it a generic name.
Also add EBADF_TRIPLET to mirror this for things like
stdin/stdout/stderr arrays, which we use a bunch of times.
This reverts commit 6b219b74de.
This commit doesn't look right to me. We have to unmount everything
recursively *before* we MS_MOVE because the MS_MOVE will not get rid of
it for us, and we simply cannot access these mounts after the MS_MOVE is
complete anymore.
This is a fundamental difference between MS_MOVE and pivot_root(). The
latter repivots the entire mount table getting rid of anything outside
of the new root. MS_MOVE otoh just mounts a bunch of mount points to the
top, leaving in place whatever might be underneath it.
Thus, if we go through the MS_MOVE codepath we must unmount everything
explicitly before doing so because otherwise the mounts will be pinned
forever, but be entirely invisble to userspace.
Negative flags always raise eyebrows. Let's normalize
SWITCH_ROOT_SKIP_RECURSIVE_RUN to become SWITCH_ROOT_RECURSIVE_RUN, i.e.
make recursive behaviour opt-in, rather than opt-out. We only want it
for the initrd→host transition, and in all other cases we'd prefer to
avoid it.
This allows us to simplify some code. Also, normalize the mount point
table in switch_root() a bit, to be static const, and then just select
between two mount flag sets via SWITCH_ROOT_RECURSIVE_RUN, where the
mount flag without MS_BIND (i.e. zero) just means "skip this entry".
This does not actually change anything in behaviour, it's just
refactoring.
Follow-up for: b12d41a8bb
Yu Watanabe
Zbigniew Jędrzejewski-Szmek
Daan De Meyer
Lennart Poettering
Antonio Alvarez Feijoo
Ivan Kruglov
Benjamin ROBIN
Mike Yuan
OMOJOLA JOSHUA