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hst/fs: implement overlay fstype
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Browse Source 
This finally exposes overlay mounts in the high level hakurei API.

Signed-off-by: Ophestra <cat@gensokyo.uk>
This commit is contained in:
Ophestra
2025-08-15 03:30:51 +09:00
parent 4433c993fa
commit 9ed3ba85ea
12 changed files with 253 additions and 3 deletions
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7
test/sandbox/case/mapuid.nix
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@@ -56,7 +56,10 @@ in
];
fs = fs "dead" {
".hakurei" = fs "800001ed" { } null;
".hakurei" = fs "800001ed" {
".ro-store" = fs "801001fd" null null;
store = fs "800001ff" null null;
} null;
bin = fs "800001ed" { sh = fs "80001ff" null null; } null;
dev = fs "800001ed" {
core = fs "80001ff" null null;
@@ -248,6 +251,8 @@ in
(ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
(ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
(ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
(ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
(ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,userxattr")
(ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
(ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=4k,mode=755,uid=1000003,gid=1000003")
(ent "/tmp/hakurei.1000/runtime/3" "/run/user/1000" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")