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container/init: mount intermediate before early

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This is usable as scratch space during early.

Signed-off-by: Ophestra <cat@gensokyo.uk>
This commit is contained in:
Ophestra
2026-05-06 00:55:45 +09:00
parent 15cdb37ec2
commit 617ee21647
2 changed files with 73 additions and 71 deletions
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14
container/init.go
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@@ -223,6 +223,13 @@ func initEntrypoint(k syscallDispatcher, msg message.Msg) {
state := &setupState{process: make(map[int]WaitStatus), Params: &param.Params, Msg: msg, Context: ctx}
defer cancel()
if err := k.mount(SourceTmpfsRootfs, intermediateHostPath, FstypeTmpfs, MS_NODEV|MS_NOSUID, zeroString); err != nil {
k.fatalf(msg, "cannot mount intermediate root: %v", optionalErrorUnwrap(err))
}
if err := k.chdir(intermediateHostPath); err != nil {
k.fatalf(msg, "cannot enter intermediate host path: %v", err)
}
/* early is called right before pivot_root into intermediate root;
this step is mostly for gathering information that would otherwise be
difficult to obtain via library functions after pivot_root, and
@@ -242,13 +249,6 @@ func initEntrypoint(k syscallDispatcher, msg message.Msg) {
}
}
if err := k.mount(SourceTmpfsRootfs, intermediateHostPath, FstypeTmpfs, MS_NODEV|MS_NOSUID, zeroString); err != nil {
k.fatalf(msg, "cannot mount intermediate root: %v", optionalErrorUnwrap(err))
}
if err := k.chdir(intermediateHostPath); err != nil {
k.fatalf(msg, "cannot enter intermediate host path: %v", err)
}
if err := k.mkdir(sysrootDir, 0755); err != nil {
k.fatalf(msg, "%v", err)
}