tree 1d41385e553b8ab7b60e3dad8fc0bcfc8ab5cf29
parent 2c3956750bb75b0d18ddd52565f998492b0f83f4
author Lorenz Brun <lorenz@monogon.tech> 1740499072 +0100
committer Lorenz Brun <lorenz@monogon.tech> 1740517394 +0000

o/blockdev: add options support

Allow passing options to Open(). This resolves a TODO left from when
blockdev was initially implemented and is now needed as Linux 6.12
rejects opening mounted block devices read-write, so we needed at least
a read-only option.

I also implemented the two options mentioned in the now-removed TODO
even though we're not using them yet.

These options are implemented generically to facilitate their use in
cross-platform code. Unsupported options are rejected at runtime. This
is similar to how Go's own stdlib does this.

Change-Id: I2548cb31e59a5c1198ca04537450bdf665878ca8
Reviewed-on: https://review.monogon.dev/c/monogon/+/3985
Reviewed-by: Jan Schär <jan@monogon.tech>
Tested-by: Jenkins CI