From dfdfd44253891884128a597c61ec6efef8ae7a26 Mon Sep 17 00:00:00 2001
From: Mario Fetka <mario.fetka@gmail.com>
Date: Sat, 20 Jun 2026 07:08:34 +0000
Subject: [PATCH] nwnss: keep zlssDev original with userspace companion

---
 .../nwnss/internal/{zlssUserIO.h => zlssDevUserIO.h}  | 10 +++++-----
 src/nwnss/CMakeLists.txt                              |  2 +-
 src/nwnss/zlss/zlssDev.c                              | 11 ++---------
 src/nwnss/zlss/{zlssUserIO.c => zlssDevUserIO.c}      |  4 ++--
 4 files changed, 10 insertions(+), 17 deletions(-)
 rename include/nwnss/internal/{zlssUserIO.h => zlssDevUserIO.h} (62%)
 rename src/nwnss/zlss/{zlssUserIO.c => zlssDevUserIO.c} (95%)

diff --git a/include/nwnss/internal/zlssUserIO.h b/include/nwnss/internal/zlssDevUserIO.h
similarity index 62%
rename from include/nwnss/internal/zlssUserIO.h
rename to include/nwnss/internal/zlssDevUserIO.h
index 0d7b8f6..152f8b5 100644
--- a/include/nwnss/internal/zlssUserIO.h
+++ b/include/nwnss/internal/zlssDevUserIO.h
@@ -1,12 +1,12 @@
-#ifndef NWNSS_INTERNAL_ZLSS_USER_IO_H
-#define NWNSS_INTERNAL_ZLSS_USER_IO_H
+#ifndef NWNSS_INTERNAL_ZLSS_DEV_USER_IO_H
+#define NWNSS_INTERNAL_ZLSS_DEV_USER_IO_H
 
 /*
- * Userspace companion for the original NSS ZLSS BIO entry points.
+ * Userspace companion for the original NSS ZLSS device/BIO entry points.
  *
  * Keep the public/original function names in zfs.h as the contract used by the
  * imported ZLSS/COMN code.  In NSS_USERSPACE builds the implementations live in
- * zlssUserIO.c instead of the kernel BIO implementation in zlssDev.c.
+ * zlssDevUserIO.c instead of the kernel BIO implementation in zlssDev.c.
  *
  * This boundary is intentionally I/O-centric: future NSS volume/image access
  * is implemented here using Linux userspace pread/pwrite/fsync semantics.  It
@@ -16,4 +16,4 @@
 
 #include <zfs.h>
 
-#endif /* NWNSS_INTERNAL_ZLSS_USER_IO_H */
+#endif /* NWNSS_INTERNAL_ZLSS_DEV_USER_IO_H */
diff --git a/src/nwnss/CMakeLists.txt b/src/nwnss/CMakeLists.txt
index 0d19c28..b7f88ab 100644
--- a/src/nwnss/CMakeLists.txt
+++ b/src/nwnss/CMakeLists.txt
@@ -342,7 +342,7 @@ add_library(nwnss SHARED
     zlss/zfsVolumeData.c
     zlss/zfsXTree.c
     zlss/zlssDev.c
-    zlss/zlssUserIO.c
+    zlss/zlssDevUserIO.c
     zlss/zlssLogicalVolume.c
     zlss/zlssLVAIPU.c
     zlss/zlssManage.c
diff --git a/src/nwnss/zlss/zlssDev.c b/src/nwnss/zlss/zlssDev.c
index a597e4d..e5a5703 100644
--- a/src/nwnss/zlss/zlssDev.c
+++ b/src/nwnss/zlss/zlssDev.c
@@ -35,14 +35,7 @@
  |
  |
  +-------------------------------------------------------------------------*/
-#ifdef NSS_USERSPACE
-/*
- * Userspace builds keep the original zlssBioIO* entry points, but their
- * implementations live in zlssUserIO.c.  Leave the kernel BIO implementation
- * below untouched for source compatibility.
- */
-#include <internal/zlssUserIO.h>
-#else
+#if !defined(NSS_USERSPACE)
 #include <linux/fs.h>
 #include <linux/bio.h>
 #include <linux/gfp.h>
@@ -695,4 +688,4 @@ void ZLSS_BioProcessStop()
 }
 
 
-#endif /* NSS_USERSPACE */
+#endif /* !NSS_USERSPACE */
diff --git a/src/nwnss/zlss/zlssUserIO.c b/src/nwnss/zlss/zlssDevUserIO.c
similarity index 95%
rename from src/nwnss/zlss/zlssUserIO.c
rename to src/nwnss/zlss/zlssDevUserIO.c
index cc70162..6194233 100644
--- a/src/nwnss/zlss/zlssUserIO.c
+++ b/src/nwnss/zlss/zlssDevUserIO.c
@@ -1,6 +1,6 @@
 /****************************************************************************
  |
- |  Userspace ZLSS BIO companion for imported NSS sources.
+ |  Userspace ZLSS device/BIO companion for imported NSS sources.
  |
  |  The imported ZLSS/COMN code keeps calling the original zlssBioIO* entry
  |  points declared in zfs.h.  Kernel builds provide them from zlssDev.c via
@@ -18,7 +18,7 @@
 #include <zOmni.h>
 #include <xError.h>
 #include <xCache.h>
-#include <internal/zlssUserIO.h>
+#include <internal/zlssDevUserIO.h>
 
 STATUS zlssBioIOSync(
     int rw,