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build: the unix paths retire — configuration, logs, and volumes move into the danos tree

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/etc/init.csv and /etc/devices.csv become /system/configuration/*.csv (the
repo's etc/ moves to system/configuration/, mirroring the runtime tree),
/var/log becomes /system/logs, and /mnt/usb becomes /volumes/usb. The
kernel VFS gains a carve-out so FAT may serve exactly /system/configuration
and /system/logs beneath the initrd-backed /system while /system and /test
themselves stay unshadowable; FAT's single /var mount splits into those two
rewritten mounts. The kvfs readdir check learns /system's third child and
the ramdisk spawn sweep skips the configuration tree.

Suite 106/106.
This commit is contained in:
Daniel Samson
2026-07-31 19:41:35 +01:00
parent e4da4e0610
commit c4f16a5448
31 changed files with 161 additions and 128 deletions
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system/services/logger/logger.zig
+7 -7
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@@ -4,7 +4,7 @@
//! demultiplexes it into **one file per process** on the flash volume:
//!
//! <base>/<boot-stamp>/<binary-path>.log
//! e.g. /mnt/usb/var/log/2026-07-21T101530Z/system/services/fat.log
//! e.g. /volumes/usb/system/logs/2026-07-21T101530Z/system/services/fat.log
//!
//! The boot stamp is the wall-clock time of boot (from klog_status), so one
//! boot session is one self-contained directory; the kernel's own records go to
@@ -37,11 +37,11 @@ const time = @import("time");
const logging = @import("logging");
/// Where log trees live: the FHS path. The kernel VFS routes /var to whatever
/// volume the fat server mounted there (today: the /var subtree of the USB
/// flash volume) — swapping the persistent medium later touches fat's two
/// mount calls, never this constant.
const base = "/var/log";
/// Where log trees live: the hierarchy path. The kernel VFS routes /system/logs
/// to whatever volume the fat server mounted there (today: the /system/logs
/// subtree of the USB flash volume) — swapping the persistent medium later
/// touches fat's mount calls, never this constant.
const base = "/system/logs";
/// Drain cadence and the quiet period after which files are closed (flushed).
const tick_ms = 250;
@@ -128,7 +128,7 @@ fn onTerminate() void {
fn tick() void {
if (!storage_ready) {
// makePath doubles as the readiness probe: while /var is unmounted the
// makePath doubles as the readiness probe: while /system/logs is unmounted the
// resolve fails fast (no storage round trip) and the ring buffers; the
// first success creates the whole per-boot tree.
if (!fs.makePath(boot_directory[0..boot_directory_len])) return;