Newer webcams and video devices have controls only available through
/dev/media* nodes. Make sure they're accessible in the same way as
/dev/video* nodes.
Closes: #21054
When a .network file is updated but its change is not so big, it is not
necessary to first drop all configs and then reassign later again.
This slightly optimize such situation. First foreignize all configs, and
then drop later when it is not requested by the updated .network file.
Apparently memory sanitizer doesn't grok getdents64() properly. Let's
address that by explicitly marken memory initialized by getdents64() as
unpoisoned.
That way we have a single syscall only for it, instead of the multiple
readdir() and friends do. And we can operate entirely on the stack, no
malloc() implicit.
We already have a similar loop twice, let's make it easier to read via
an iteration macro.
(The new macro is a bit more careful even, as it verifies the full
dirent fits into the remaining buffer when returning it)
That way we can fail earlier if the specified fd is not actually a
directory.
(Also, it's not exactly according to standards to open things without
either O_RDONLY/O_RDWR...)
Talking to external daemons we ourselves maintain is a job for the
integration tests, not the unit tests. This communication is likely to
fail hence don#t even bother.
This makes our tests a bit cleaner.
Let's move things around a bit, and open /proc/self/mountinfo if needed
inside of bind_remount_one_with_mountinfo(). That way bind_remount_one()
can become a superthin inline wrapper around
bind_remount_one_with_mountinfo(). Main benefit is that we don't even
have to open /p/s/mi in case mount_setattr() actually worked for us.
In order to minimize EFI variable NVRAM wear, do not rewrite variables
if they are already in the wanted state (i.e. same data and attributes).
This allows e.g. performing repeat calls of "bootctl install" (which
always rewrites the EFI boot entry) without consuming EFI NVRAM write
cycles.
We should drop caches if we are configured to do so in all cases where
we are done with home dir operations: except if that operation is
activation, because in that case we are not destroying anything, but
leaving it on.
Hence, turn off the flag that reminds us that we should drop caches
before exiting, once activation completed fully,
Follow-up for 86019efa44
We try to pass containers roughly the same rlimits as the host gets from
the kernel. However, this means we'd set the RLIMIT_NOFILE to 4K. Which
is quite limiting though, and is something we actually departed from in
PID1: since 52d6207578 we raise the limit
substantially for all userspace.
Given that nspawn is quite often invoked without proper PID1, let's raise the
limits for container payloads the same way as we do from the real PID1
to its service payloads.
This is useful if the auto-firmware setting has been disabled. The
keys used here are based on what the majority of firmware employ in
the wild.
This also ensures there's a chance for the user to discover this in
case they were too slow during POST or simply used the wrong ones.
We are using this for creating userns namespaces, and we really
shouldn't try to sync there. Moreover the use of free() in shutdown code
doesn't need it anyway, since it just sync()ed right before anyway. Only
the third user of freeze() we have actually needs the syc(), hence do it
there and nowhere else.
This returns a namespace fd, and takes a uidmap/gidmap as string. This
is split out out mount-util.c's remount_idmap() logic, so that we can
allocate a userns independently.
Previously the call did two things, and the second thing was optional
(depending on first arg being NULL). Let's simplify this and just make
it two distinct functions, where one calls the other.
This should make things a bit more readable, given that we called a
function called "…and_mount()" which didn't actually mount...
No actual code changes, just some refactoring.
We use this work dir a various places, and it's easy to mistype, hence
let the compiler detect this for us, and introduce a macro for it.
No code changes, just some search/replace.
Previously we'd possibly see POLLHUP on a varlink link, and continue to
run epoll on it even though we have nothing to read nor write anymore.
Let's fix that, and once we know that there's nothing to write anymore
(or we saw a write error already) we'll disconnect after POLLHUP.
Fixes: #20062
This adds a tiny shortcut to fd_reopen(): if we are about to reopen the
fd via O_DIRECTORY then we know it#s a directory and we might as well
reopen it via opening "." using the fd as "at fd" in openat().
This has the benefit that we don't need /proc/self/fd/ around for this
special case: fewer sources of errors.
The clock to use internally is clock_boottime_or_monotonic(), but the
test used CLOCK_MONOTONIC. After one system suspend the test thus likely
starts to fail.
Bastien Nocera
Yu Watanabe
Lennart Poettering
Anssi Hannula
Jan Janssen