Bug 1967958
| Summary: | dracut: Add support for virtiofs as root filesystem | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 9 | Reporter: | Vivek Goyal <vgoyal> |
| Component: | dracut | Assignee: | Pavel Valena <pvalena> |
| Status: | CLOSED ERRATA | QA Contact: | qe-baseos-daemons |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 9.0 | CC: | dgilbert, dracut-maint-list, dtardon, gmaglione, jieli, mszeredi, pvalena, ruyang, slopezpa, stefanha, xiagao |
| Target Milestone: | beta | Keywords: | FutureFeature, TestOnly, Triaged |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | dracut-057-13.git20220816.el9 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-08-17 14:20:00 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2066816, 2085347 | ||
| Bug Blocks: | 2054152 | ||
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Description
Vivek Goyal
2021-06-04 14:25:20 UTC
I assume you have the set up to test this easily, so: does it work if you add qemu module into initrd? If not, does it work if you add qemu module and virtiofs driver? (In reply to David Tardon from comment #1) > I assume you have the set up to test this easily, so: does it work if you > add qemu module into initrd? If not, does it work if you add qemu module and > virtiofs driver? I don't have a working setup yet. Frankly speaking, my initrd will not mount it and drop me to emergency shell. There I will mount it manually "mount -t virtiofs myfs /sysroot" and then continue booting. I think one problem is that how rootfs device should be specified for virtiofs filessytem. There does not seem to be a good way and different kind of hacks are being used. I have proposed one patch upstream just now. https://lore.kernel.org/linux-fsdevel/20210608153524.GB504497@redhat.com/ If this gets accepted then we can specify "root=fstag:myfs rootfstype=virtiofs" on kernel command line. I am assuming that some dracut module can parse this and mount virtiofs. Not sure if we will need a separate virtiofs module for this or some existing module can take care this. I have not played with "qemu" module. Can give it a try. What is it supposed to do? I mean what kind of filesystems it can mount. I see that we have a module 95virtfs/ which seems to have support for 9p/virtfs. I think we will need something similar for virtiofs. What I am not sure is that does dracut relies on same syntax for "root=" option for kernel and dracut. Or dracut has moved on and has its own way to parse root= option irrespective of kernel. If dracut parses "root=virtiofs:myfs", then problem becomes little easier. Or may be we can modify it to parse "root=fstag:myfs rootfstype=virtiofs" combo so that it is inline with kernel parsing. Assuming kernel, will accept my proposal. *** Bug 2076212 has been marked as a duplicate of this bug. *** I have sent a PR to add virtiofs as a dracut module. https://github.com/dracutdevs/dracut/pull/1784 Hello, please test, if you can, whether the planned rebase for 9.1 works for you. RPMS: https://github.com/pvalena/rpms/tree/main/dracut/2066816 |