Request: cherry-pick commit be2ca38 `Revert "fs/9p: simplify iget to remove unnecessary paths"`

[Akihiro Suda]

Linux kernel v6.9 introduced a regression of 9pfs in the commit <https://github.com/torvalds/linux/commit/724a084>, and it was fixed in v6.12-rc5 (<https://github.com/torvalds/linux/commit/be2ca38>):

> This code simplification introduced significant regressions on servers
> that do not remap inode numbers when exporting multiple underlying
> filesystems with colliding inodes, as can be illustrated with simple
> tmpfs exports in qemu with remapping disabled:
> [...]

Could you consider cherry-picking the fix to Ubuntu 24.10's kernel 6.11 ?

CentOS Stream 10 has already cherry-picked the commit to their kernel 6.11 tree: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/commits/kernel-6.11.0-27.el10/fs/9p?ref_type=tags

[Timo Aaltonen (tjaalton)]

there are a bunch of fs/9p reverts all tagged for stable@, so they will eventually end up in 6.11.x and to the oracular kernel