dracut does not install the kernel module of the block device that contains
the root filesystem if the following preconditions are met:
- Running in host-only mode.
- Symlinks of all block devices needed to boot the system pointing to virtual
subsystems.
The get_dev_module function uses "udevadm info -a" to get the corresponding
kernel modules of a /sys/class/*/* or /dev/* device. This function is called
in modules.d/90kernel-modules/module-setup.sh to detect if dracut must install
block device drivers in host-only mode. The symlinks in /sys/dev/block/
usually point to "real" devices in /sys/devices/pci*. But, we have come across
some NVMe systems where the kernel creates the symlinks in /sys/dev/block/
pointing to "virtual" devices instead. In this case, udevadm never finds any
"driver" attributes following up the chain of parent devices.
If the system provides more than one UUID, the _MD_UUID var
contains a line break after each UUID. Therefore the strstr
function could not find any UUID, caused by the additional
spaces provided to the function.
Furthermore this could lead to a boot interruption, because
the start of a degraded raid1 won't be executed. So, manual
interaction is necessary.
dracut-cpio already carries a bunch of unit tests covering compression
and GNU cpio extraction. The purpose of these tests is to exercise the
dracut.sh --enhanced-cpio code-paths as well as kernel cpio archive
extraction.
Signed-off-by: David Disseldorp <ddiss@suse.de>
The new dracut-cpio binary is capable of performing copy-on-write
optimized initramfs archive creation, but due to the rust dependency
isn't built / installed by default.
This change adds a new "--enhanced-cpio" parameter for dracut which
sees dracut-cpio called for archive creation instead of GNU cpio.
Signed-off-by: David Disseldorp <ddiss@suse.de>
dracut-cpio is a minimal cpio archive creation utility written in Rust.
It provides support for a minimal set of features needed to create
performant and space-efficient initramfs archives:
- "newc" archive format only
- reproducible; inode numbers, uid/gid and mtime can be explicitly set
- data segment copy-on-write reflinks
+ using Rust io::copy()'s native copy_file_range() support[1]
+ optional archive data segment alignment for optimal reflink use[2]
- hardlink support
- comprehensive tests asserting GNU cpio binary output compatibility
1. Rust io::copy() copy_file_range()
https://github.com/rust-lang/rust/pull/75272
2. Data segment alignment
We're bending the newc spec a bit to inject zeros after the file path
to provide data segment alignment. These zeros are accounted for in
the namesize, but some applications may only expect a single
zero-terminator (and 4 byte alignment). GNU cpio and Linux initramfs
handle this fine as long as PATH_MAX isn't exceeded.
Signed-off-by: David Disseldorp <ddiss@suse.de>
Crosvm's rust argument library is very small and simple, while still
providing helpful functionality. It will be consumed by dracut-cpio in a
subsequent commit.
The unmodified, BSD licensed argument.rs source is lifted as-is from
https://chromium.googlesource.com/chromiumos/platform/crosvm
(release-R92-13982.B b6ae6517aeef9ae1e3a39c55b52f9ac6de8edb31).
The one-line crosvm.rs wrapper is needed to ensure that crosvm::argument
imports continue to work.
Signed-off-by: David Disseldorp <ddiss@suse.de>
On platforms where the kernel is built without suspend/resume support we
see "cat: /sys/power/resume: No such file or directory" message when
creating an initrd image. Check for the presence of /sys/power/resume
first before reading it.
Signed-off-by: Dan Horák <dan@danny.cz>
Systemd is an optional module for the dmsquash-live module. This scenario
is properly handled for other modules (for example livenet module) but not
for dmsquash-live module.
When a forced shutdown is issued through sending a burst of Ctrl-Alt-Del
keys, systemd sends SIGTERM to all processes. This ends up killing
dracut-initramfs-restore as well, preventing the script from detecting
that the unpack of the initramfs is incomplete, which later causes a
crash to happen when "shutdown" tries to execute from the unpacked
initramfs.
This fix makes sure dracut-initramfs-restore remains alive to detect
the unpack failed (because cpio was killed by systemd too).
Refs:
* https://bugzilla.redhat.com/show_bug.cgi?id=2023665
There appears to be an issue with newer QEMU versions (spotted with Arch
Linux and C9S containers) which causes the respective GH Action to hang
when booting a QEMU VM in combination with the `-cpu max` parameter.
During (a particularly painful) debugging session I once managed to get
some output from such "frozen" machine (using `earlycon` and
`earlyprintk` kernel cmdline options), and in that particular case the
VM died with a trap caused by an invalid opcode.
I couldn't reproduce this locally, only in GH Actions environment with
Arch Linux and C9S containers. Also, so far I haven't found out which
specific CPUID flag causes this, but using the `IvyBridge-v2` feature
set seems to mitigate the issue.
Like the dwc/chipidea controllers the isp1760 can act in either
host or gadget mode so it ends up in it's own directory. Add this
driver into the initrd as it's part of some arm platforms and
is needed to be able to boot off USB storage.
Fixes issue #1619
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
The network-manager module also writes logs to the console, so that it's easier
to debug network-related boot issues. If systemd can't open the console, the
service fails and network doesn't get configured.
Add a check to disable tty output when the console is not present or not
usable.
https://github.com/coreos/fedora-coreos-tracker/issues/943
When systemd is compiled with ASAN library to troubleshoot memory issues
within systemd code, the libasan library expects to have /proc be
available as soon as systemd starts, which isn't the case currently,
causing an assertion to fail, systemd to crash and kernel to panic:
==1==AddressSanitizer CHECK failed: ../../../../libsanitizer/sanitizer_common/sanitizer_procmaps_common.cc:75 "((data_.proc_self_maps.len)) > ((0))" (0x0, 0x0)
<empty stack>
X.XXXXXXX Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100
[...]
We need to pull in Type-C USB drivers as they can provide a number of
differnet bits of functionality in early boot including input, display
(altmode DP) and storage so we need to have them available to ensure
functionality attached to those buses/interfaces are available in early
boot.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
This removes the 'ExecStop=' field from `multipathd.service`.
Sometimes CI runs do encounter a failure related to this
service in initrd, which seems to be stemming from a socket
I/O race between the client and the server on shutdown.
It looks like the client (`multipathd shutdown`) can lose the race,
hit an I/O error, and cause the whole unit to fail (even if the server
managed to shutdown properly already).
Notably, the upstream unit does not have such stop command
as the daemon can already perform a graceful exit through
its signal handler.
As such, this commit partially re-aligns the two units,
trying to sidestep any of the existing races.
Refs:
* https://github.com/coreos/fedora-coreos-tracker/issues/803
* https://github.com/opensvc/multipath-tools/blob/0.8.7/multipathd/multipathd.service
Fix how ifname for a given local_address is found.
Fix logic to detect presence of ifname and route.
Signed-off-by: Charles Rose <charles.rose@dell.com>
Currently $_dev is always overridden with the value returned by
label_uuid_to_dev(). This results in an empty value if $_dev is a
device path. Fix this by calling label_uuid_to_dev() conditionally.
Bug: https://bugs.gentoo.org/807971
Fixes: d3532978de
On hostonly mode, the platform driver is not copied blindless. There
should be a way to detect the real hardware driver, which probes a block
device.
/sys/dev/block/major:minor is a symbol link, which points to the real
device, recording the hardware stack. And those info can help to
identify the associated drivers for the hardware stack.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
---
v2 -> v3:
address shellcheck in dracut-functions.sh
v1 -> v2:
remove local variable _extra_mod
shorten subject
Jóhann B. Guðmundsson