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This will allow the text to be used in Wikipedia for example; it
also just makes more sense for documentation than the LGPLv2+.
Closes: #1431Closes: #1432
Approved by: jlebon
Much like the (optional) initramfs at
`/usr/lib/ostree-boot/initramfs-<SHA256>` or
`/usr/lib/modules/$kver/initramfs` you can now optionally include a
flattened devicetree (.dtb) file alongside the kernel at
`/usr/lib/ostree-boot/devicetree-<SHA256>` or
`/usr/lib/modules/$kver/devicetree`.
This is useful for embedded ARM systems which need the devicetree file
loaded by the bootloader for the kernel to discover and initialise
hardware. See https://en.wikipedia.org/wiki/Device_tree for more
information.
This patch was mostly produced by copy-pasting code for initramfs handling
and renaming `s/initramfs/devicetree/g`. It's not beautiful, but it is
fairly straightforward.
It may be useful to extend device-tree support in a number ways in the
future. Device trees dependant on many details of the hardware they
support. This makes them unlike kernels, which may support many different
hardware variants as long as the instruction-set matches. This means that
a ostree tree created with a device-tree in this manner will only boot on
a single model of hardware. This is sufficient for my purposes, but may
not be for others'.
I've tested this on my NVidia Tegra TK1 device which has u-boot running
in syslinux-compatible mode.
Closes: #1411
Approved by: cgwalters
I never really liked the term "osname". I feel "stateroot" is a *lot* clearer,
since the osname/stateroot mostly just holds `/var`. Further it avoids the `os`
prefix which is already overloaded.
Some of the existing docs already talked about "operating system state", which
further reinforces this.
There's *lot* more things than this which reference the term "osname", but I
don't want to change *everything* yet in this patch in case we decide to do
something different - this just gets the highlights.
Closes: #794
Approved by: jlebon
A few links in the docs had the Markdown syntax swapped like:
(link title)[link url]
Just cleaned up those. Verified via `mkdocs serve`
Closes: #297
Approved by: cgwalters
I'd like to encourage people to make OSTree-managed systems more
strictly read-only in multiple places. Ideally everywhere is
read-only normally besides `/var/`, `/tmp/`, and `/run`.
`/boot` is a good example of something to make readonly. Particularly
now that there's work on the `admin unlock` verb, we need to protect
the system better against things like `rpm -Uvh kernel.rpm` because
the RPM-packaged kernel won't understand how to do OSTree right.
In order to make this work of course, we *do* need to remount `/boot`
as writable when we're doing an upgrade that changes the kernel
configuration. So the strategy is to detect whether it's read-only,
and if so, temporarily mount read-write, then remount read-only when
the upgrade is done.
We can generalize this in the future to also do `/etc` (and possibly
`/sysroot/ostree/` although that gets tricky).
One detail: In order to detect "is this path a mountpoint" is
nontrivial - I looked at copying the systemd code, but the right place
is to use `libmount` anyways.
I was going through the new version of the docs and noticed a few
problems. Mostly URLs that aren't linked, extra whitespace, and a few
mis-spellings.
I ran the files through `aspell check` and made some manual changes
myself.
These changes were tested locally with `mkdocs serve`
I don't much like Docbook (and am considering converting the man pages
too), but let's start with the manual.
I looked at various documentation generators (there are a lot), and
I had a few requirements:
- Markdown
- Packaged in Fedora
- Suitable for upload to a static webserver
`mkdocs` seems to fit the bill.