Integrate 9pfs multi-attach patches to support isolated 9pfs clients#210
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Add guest-kernel patches that let one Xen 9pfs frontend back several mounts, each attaching with its own aname, and advertise the capability as edera_multi_attach_v1 in /sys/fs/9p/features. This lets zones mount each volume as an independent 9p mount so df resolves per volume instead of every volume reporting the single shared device. The 9p mount API became fs_context-based in 6.19, so there are two variants: 9pfs-xen-multi-attach.patch (lower: 6.19) and an old-mount-API backport 9pfs-xen-multi-attach-6.18.patch (series: 6.18).
azenla
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tycho
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Jul 15, 2026
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This alone won't solve it, there is a separate PR at https://github.com/edera-dev/protect/pull/2968 which will need to be updated once this is built. After that is pinned to a new kernel here, it can use this new functionality. |
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Kernel patches to let one Xen 9pfs frontend serve multiple mounts, each with its own aname, advertised via /sys/fs/9p/features. This lets zones mount each volume as its own 9p mount so df resolves per-volume instead of everything showing the one shared device.
Two variants since the 9p mount API changed in 6.19:
Needs the matching protect zone/storage changes to actually be used; safe on unpatched kernels (the zone falls back to bind mounts when the feature isn't advertised).