Re: [PATCH kmod v4 4/4] libkmod, depmod, modprobe: Make directory for kernel modules configurable

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On Mon, Jul 17, 2023 at 12:39:53PM +0200, Michal Suchanek wrote:
modprobe.d is now searched under ${prefix}/lib, add ${module_directory} to
specify the directory where to search for kernel modules.

I was failing to see the relation of modprobe.d with the module
directory. Maybe reword this slightly?

Now that modprobe.d is searched under ${prefix}/lib, allow a complete
transition to files only under ${prefix} by adding a ${module_directory}
configuration. This specifies the directory where to search for kernel
modules and should match the location where the kernel/distro installs
them.


With this distributions that do not want to ship files in /lib can also
move kernel modules to /usr while others can keep them in /lib.

Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
---
v4: Make the whole path configurable
---
Makefile.am                          |   3 +-
configure.ac                         |   7 ++
libkmod/libkmod.c                    |   4 +-
man/Makefile.am                      |   1 +
man/depmod.d.xml                     |   6 +-
man/depmod.xml                       |   4 +-
man/modinfo.xml                      |   2 +-
man/modprobe.xml                     |   2 +-
man/modules.dep.xml                  |   6 +-
testsuite/module-playground/Makefile |   2 +-
testsuite/setup-rootfs.sh            | 109 +++++++++++++++------------
testsuite/test-depmod.c              |  16 ++--
testsuite/test-testsuite.c           |   8 +-
tools/depmod.c                       |   6 +-
tools/kmod.c                         |   1 +
tools/modinfo.c                      |   4 +-
tools/modprobe.c                     |   4 +-
tools/static-nodes.c                 |   6 +-
18 files changed, 107 insertions(+), 84 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 7aa5bfa5638d..981574558c93 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,6 +20,7 @@ AM_CPPFLAGS = \
	-I$(top_srcdir) \
	-DSYSCONFDIR=\""$(sysconfdir)"\" \
	-DPREFIX=\""$(prefix)"\" \
+	-DMODULE_DIRECTORY=\""$(module_directory)"\" \
	${zlib_CFLAGS}

AM_CFLAGS = $(OUR_CFLAGS)
@@ -220,7 +221,7 @@ EXTRA_DIST += testsuite/setup-rootfs.sh
MODULE_PLAYGROUND = testsuite/module-playground
ROOTFS = testsuite/rootfs
ROOTFS_PRISTINE = $(top_srcdir)/testsuite/rootfs-pristine
-CREATE_ROOTFS = $(AM_V_GEN) $(top_srcdir)/testsuite/setup-rootfs.sh $(ROOTFS_PRISTINE) $(ROOTFS) $(MODULE_PLAYGROUND) $(top_builddir)/config.h $(sysconfdir)
+CREATE_ROOTFS = $(AM_V_GEN) MODULE_DIRECTORY=$(module_directory) $(top_srcdir)/testsuite/setup-rootfs.sh $(ROOTFS_PRISTINE) $(ROOTFS) $(MODULE_PLAYGROUND) $(top_builddir)/config.h $(sysconfdir)

build-module-playground:
	$(AM_V_GEN)if test "$(top_srcdir)" != "$(top_builddir)"; then \
diff --git a/configure.ac b/configure.ac
index 6064dee77ae6..a195c8e6b554 100644
--- a/configure.ac
+++ b/configure.ac
@@ -84,6 +84,12 @@ AC_ARG_WITH([rootlibdir],
        [], [with_rootlibdir=$libdir])
AC_SUBST([rootlibdir], [$with_rootlibdir])

+# Ideally this would be $prefix/lib/modules but default to /lib/modules for compatibility with earlier versions
+AC_ARG_WITH([module_directory],
+        AS_HELP_STRING([--with-module-directory=DIR], [directory in which to look for kernel modules - typically '/lib/modules' or '${prefix}/lib/modules']),
+        [], [with_module_directory=/lib/modules])
+AC_SUBST([module_directory], [$with_module_directory])
+
AC_ARG_WITH([zstd],
	AS_HELP_STRING([--with-zstd], [handle Zstandard-compressed modules @<:@default=disabled@:>@]),
	[], [with_zstd=no])
@@ -304,6 +310,7 @@ AC_MSG_RESULT([
	$PACKAGE $VERSION
	=======

+	module_directory:	${module_directory}
	prefix:			${prefix}
	sysconfdir:		${sysconfdir}
	libdir:			${libdir}
diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
index f3139c1cef97..d2ed8748c833 100644
--- a/libkmod/libkmod.c
+++ b/libkmod/libkmod.c
@@ -209,7 +209,7 @@ static int log_priority(const char *priority)
	return 0;
}

-static const char *dirname_default_prefix = "/lib/modules";
+static const char *dirname_default_prefix = MODULE_DIRECTORY;

static char *get_kernel_release(const char *dirname)
{
@@ -231,7 +231,7 @@ static char *get_kernel_release(const char *dirname)
/**
 * kmod_new:
 * @dirname: what to consider as linux module's directory, if NULL
- *           defaults to /lib/modules/`uname -r`. If it's relative,
+ *           defaults to ${module_prefix}/lib/modules/`uname -r`. If it's relative,
 *           it's treated as relative to the current working directory.
 *           Otherwise, give an absolute dirname.
 * @config_paths: ordered array of paths (directories or files) where
diff --git a/man/Makefile.am b/man/Makefile.am
index ad07c30bbd24..25c2cc6fdf13 100644
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -22,6 +22,7 @@ CLEANFILES = $(dist_man_MANS)
	else \
		sed -e '/@PREFIX@/d' $< ; \
	fi | \
+	sed -e 's|@MODULE_DIRECTORY@|$(module_directory)|g' | \
	$(XSLT) \
		-o $@ \
		--nonet \
diff --git a/man/depmod.d.xml b/man/depmod.d.xml
index 431ebca6654b..676977c69a4f 100644
--- a/man/depmod.d.xml
+++ b/man/depmod.d.xml
@@ -70,7 +70,7 @@
        </term>
        <listitem>
          <para>
-            This allows you to specify the order in which /lib/modules
+            This allows you to specify the order in which @MODULE_DIRECTORY@
            (or other configured module location) subdirectories will
            be processed by <command>depmod</command>. Directories are
            listed in order, with the highest priority given to the
@@ -101,7 +101,7 @@
            <command>depmod</command> command. It is possible to
            specify one kernel or all kernels using the * wildcard.
            <replaceable>modulesubdirectory</replaceable> is the
-            name of the subdirectory under /lib/modules (or other
+            name of the subdirectory under @MODULE_DIRECTORY@ (or other
            module location) where the target module is installed.
          </para>
          <para>
@@ -110,7 +110,7 @@
            specifying the following command: "override kmod * extra".
            This will ensure that any matching module name installed
            under the <command>extra</command> subdirectory within
-            /lib/modules (or other module location) will take priority
+            @MODULE_DIRECTORY@ (or other module location) will take priority
            over any likenamed module already provided by the kernel.
          </para>
        </listitem>
diff --git a/man/depmod.xml b/man/depmod.xml
index 3b0097184fd7..fce2a4a67a89 100644
--- a/man/depmod.xml
+++ b/man/depmod.xml
@@ -80,7 +80,7 @@
    </para>
    <para> <command>depmod</command> creates a list of module dependencies by
      reading each module under
-      <filename>/lib/modules/</filename><replaceable>version</replaceable> and
+      <filename>@MODULE_DIRECTORY@/</filename><replaceable>version</replaceable> and
      determining what symbols it exports and what symbols it needs.  By
      default, this list is written to <filename>modules.dep</filename>, and a
      binary hashed version named <filename>modules.dep.bin</filename>, in the
@@ -141,7 +141,7 @@
        <listitem>
          <para>
            If your modules are not currently in the (normal) directory
-            <filename>/lib/modules/</filename><replaceable>version</replaceable>,
+            <filename>@MODULE_DIRECTORY@/</filename><replaceable>version</replaceable>,
            but in a staging area, you can specify a
            <replaceable>basedir</replaceable> which is prepended to the
            directory name.  This <replaceable>basedir</replaceable> is
diff --git a/man/modinfo.xml b/man/modinfo.xml
index 9fe0324a2527..b6c4d6045829 100644
--- a/man/modinfo.xml
+++ b/man/modinfo.xml
@@ -54,7 +54,7 @@
      <command>modinfo</command> extracts information from the Linux Kernel
      modules given on the command line.  If the module name is not a filename,
      then the
-      <filename>/lib/modules/</filename><replaceable>version</replaceable>
+      <filename>@MODULE_DIRECTORY@/</filename><replaceable>version</replaceable>
      directory is searched, as is also done by
      <citerefentry><refentrytitle>modprobe</refentrytitle><manvolnum>8</manvolnum></citerefentry>
      when loading kernel modules.
diff --git a/man/modprobe.xml b/man/modprobe.xml
index 91f9e27997cd..4d1fd59c000b 100644
--- a/man/modprobe.xml
+++ b/man/modprobe.xml
@@ -78,7 +78,7 @@
      is no difference between _ and - in module names (automatic
      underscore conversion is performed).
      <command>modprobe</command> looks in the module directory
-      <filename>/lib/modules/`uname -r`</filename> for all
+      <filename>@MODULE_DIRECTORY@/`uname -r`</filename> for all
      the modules and other files, except for the optional
      configuration files in the
      <filename>/etc/modprobe.d</filename> directory
diff --git a/man/modules.dep.xml b/man/modules.dep.xml
index ed633694ec9e..8ef6d8b3536e 100644
--- a/man/modules.dep.xml
+++ b/man/modules.dep.xml
@@ -34,8 +34,8 @@
  </refnamediv>

  <refsynopsisdiv>
-    <para><filename>/lib/modules/modules.dep</filename></para>
-    <para><filename>/lib/modules/modules.dep.bin</filename></para>
+    <para><filename>@MODULE_DIRECTORY@/modules.dep</filename></para>
+    <para><filename>@MODULE_DIRECTORY@/modules.dep.bin</filename></para>
  </refsynopsisdiv>

  <refsect1><title>DESCRIPTION</title>
@@ -43,7 +43,7 @@
      <filename>modules.dep.bin</filename> is a binary file generated by
      <command>depmod</command> listing the dependencies for
      every module in the directories under
-      <filename>/lib/modules/</filename><replaceable>version</replaceable>.
+      <filename>@MODULE_DIRECTORY@/</filename><replaceable>version</replaceable>.
      It is used by kmod tools such as <command>modprobe</command> and
      libkmod.
    </para>
diff --git a/testsuite/module-playground/Makefile b/testsuite/module-playground/Makefile
index e6045b0dd932..a7ab09bea2bf 100644
--- a/testsuite/module-playground/Makefile
+++ b/testsuite/module-playground/Makefile
@@ -47,7 +47,7 @@ endif

else
# normal makefile
-KDIR ?= /lib/modules/`uname -r`/build
+KDIR ?= $(module_prefix)/lib/modules/`uname -r`/build
KVER ?= `uname -r`
ifeq ($(FAKE_BUILD),)
    FAKE_BUILD=0
diff --git a/testsuite/setup-rootfs.sh b/testsuite/setup-rootfs.sh
index 4440ddcd6b4d..a780f9381b3c 100755
--- a/testsuite/setup-rootfs.sh
+++ b/testsuite/setup-rootfs.sh
@@ -16,6 +16,19 @@ create_rootfs() {
	cp -r "$ROOTFS_PRISTINE" "$ROOTFS"
	find "$ROOTFS" -type d -exec chmod +w {} \;
	find "$ROOTFS" -type f -name .gitignore -exec rm -f {} \;
+	if [ "$MODULE_DIRECTORY" != "/lib/modules" ] ; then
+		sed -i -e "s|/lib/modules|$MODULE_DIRECTORY|g" $(find "$ROOTFS" -name \*.txt -o -name \*.conf -o -name \*.dep)
+		sed -i -e "s|$MODULE_DIRECTORY/external|/lib/modules/external|g" $(find "$ROOTFS" -name \*.txt -o -name \*.conf -o -name \*.dep)

why this second sed?

Lucas De Marchi

+		for i in "$ROOTFS"/*/lib/modules/* "$ROOTFS"/*/*/lib/modules/* ; do
+			version="$(basename $i)"
+			[ $version != 'external' ] || continue
+			mod="$(dirname $i)"
+			lib="$(dirname $mod)"
+			up="$(dirname $lib)$MODULE_DIRECTORY"
+			mkdir -p "$up"
+			mv "$i" "$up"
+		done
+	fi

	if [ "$SYSCONFDIR" != "/etc" ]; then
		find "$ROOTFS" -type d -name etc -printf "%h\n" | while read -r e; do
@@ -32,57 +45,57 @@ feature_enabled() {

declare -A map
map=(
-    ["test-depmod/search-order-simple/lib/modules/4.4.4/kernel/crypto/"]="mod-simple.ko"
-    ["test-depmod/search-order-simple/lib/modules/4.4.4/updates/"]="mod-simple.ko"
-    ["test-depmod/search-order-same-prefix/lib/modules/4.4.4/foo/"]="mod-simple.ko"
-    ["test-depmod/search-order-same-prefix/lib/modules/4.4.4/foobar/"]="mod-simple.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-c.ko"]="mod-loop-c.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-d.ko"]="mod-loop-d.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-e.ko"]="mod-loop-e.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-f.ko"]="mod-loop-f.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-g.ko"]="mod-loop-g.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-h.ko"]="mod-loop-h.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-i.ko"]="mod-loop-i.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-j.ko"]="mod-loop-j.ko"
-    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-k.ko"]="mod-loop-k.ko"
-    ["test-depmod/search-order-external-first/lib/modules/4.4.4/foo/"]="mod-simple.ko"
-    ["test-depmod/search-order-external-first/lib/modules/4.4.4/foobar/"]="mod-simple.ko"
+    ["test-depmod/search-order-simple$MODULE_DIRECTORY/4.4.4/kernel/crypto/"]="mod-simple.ko"
+    ["test-depmod/search-order-simple$MODULE_DIRECTORY/4.4.4/updates/"]="mod-simple.ko"
+    ["test-depmod/search-order-same-prefix$MODULE_DIRECTORY/4.4.4/foo/"]="mod-simple.ko"
+    ["test-depmod/search-order-same-prefix$MODULE_DIRECTORY/4.4.4/foobar/"]="mod-simple.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-c.ko"]="mod-loop-c.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-d.ko"]="mod-loop-d.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-e.ko"]="mod-loop-e.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-f.ko"]="mod-loop-f.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-g.ko"]="mod-loop-g.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-h.ko"]="mod-loop-h.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-i.ko"]="mod-loop-i.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-j.ko"]="mod-loop-j.ko"
+    ["test-depmod/detect-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-k.ko"]="mod-loop-k.ko"
+    ["test-depmod/search-order-external-first$MODULE_DIRECTORY/4.4.4/foo/"]="mod-simple.ko"
+    ["test-depmod/search-order-external-first$MODULE_DIRECTORY/4.4.4/foobar/"]="mod-simple.ko"
    ["test-depmod/search-order-external-first/lib/modules/external/"]="mod-simple.ko"
-    ["test-depmod/search-order-external-last/lib/modules/4.4.4/foo/"]="mod-simple.ko"
-    ["test-depmod/search-order-external-last/lib/modules/4.4.4/foobar/"]="mod-simple.ko"
+    ["test-depmod/search-order-external-last$MODULE_DIRECTORY/4.4.4/foo/"]="mod-simple.ko"
+    ["test-depmod/search-order-external-last$MODULE_DIRECTORY/4.4.4/foobar/"]="mod-simple.ko"
    ["test-depmod/search-order-external-last/lib/modules/external/"]="mod-simple.ko"
-    ["test-depmod/search-order-override/lib/modules/4.4.4/foo/"]="mod-simple.ko"
-    ["test-depmod/search-order-override/lib/modules/4.4.4/override/"]="mod-simple.ko"
-    ["test-dependencies/lib/modules/4.0.20-kmod/kernel/fs/foo/"]="mod-foo-b.ko"
-    ["test-dependencies/lib/modules/4.0.20-kmod/kernel/"]="mod-foo-c.ko"
-    ["test-dependencies/lib/modules/4.0.20-kmod/kernel/lib/"]="mod-foo-a.ko"
-    ["test-dependencies/lib/modules/4.0.20-kmod/kernel/fs/"]="mod-foo.ko"
+    ["test-depmod/search-order-override$MODULE_DIRECTORY/4.4.4/foo/"]="mod-simple.ko"
+    ["test-depmod/search-order-override$MODULE_DIRECTORY/4.4.4/override/"]="mod-simple.ko"
+    ["test-dependencies$MODULE_DIRECTORY/4.0.20-kmod/kernel/fs/foo/"]="mod-foo-b.ko"
+    ["test-dependencies$MODULE_DIRECTORY/4.0.20-kmod/kernel/"]="mod-foo-c.ko"
+    ["test-dependencies$MODULE_DIRECTORY/4.0.20-kmod/kernel/lib/"]="mod-foo-a.ko"
+    ["test-dependencies$MODULE_DIRECTORY/4.0.20-kmod/kernel/fs/"]="mod-foo.ko"
    ["test-init/"]="mod-simple.ko"
    ["test-remove/"]="mod-simple.ko"
-    ["test-modprobe/show-depends/lib/modules/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
-    ["test-modprobe/show-depends/lib/modules/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
-    ["test-modprobe/show-depends/lib/modules/4.4.4/kernel/mod-simple.ko"]="mod-simple.ko"
+    ["test-modprobe/show-depends$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
+    ["test-modprobe/show-depends$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
+    ["test-modprobe/show-depends$MODULE_DIRECTORY/4.4.4/kernel/mod-simple.ko"]="mod-simple.ko"
    ["test-modprobe/show-exports/mod-loop-a.ko"]="mod-loop-a.ko"
-    ["test-modprobe/softdep-loop/lib/modules/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
-    ["test-modprobe/softdep-loop/lib/modules/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
-    ["test-modprobe/install-cmd-loop/lib/modules/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
-    ["test-modprobe/install-cmd-loop/lib/modules/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
-    ["test-modprobe/force/lib/modules/4.4.4/kernel/"]="mod-simple.ko"
-    ["test-modprobe/oldkernel/lib/modules/3.3.3/kernel/"]="mod-simple.ko"
-    ["test-modprobe/oldkernel-force/lib/modules/3.3.3/kernel/"]="mod-simple.ko"
-    ["test-modprobe/alias-to-none/lib/modules/4.4.4/kernel/"]="mod-simple.ko"
-    ["test-modprobe/module-param-kcmdline/lib/modules/4.4.4/kernel/"]="mod-simple.ko"
+    ["test-modprobe/softdep-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
+    ["test-modprobe/softdep-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
+    ["test-modprobe/install-cmd-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
+    ["test-modprobe/install-cmd-loop$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
+    ["test-modprobe/force$MODULE_DIRECTORY/4.4.4/kernel/"]="mod-simple.ko"
+    ["test-modprobe/oldkernel$MODULE_DIRECTORY/3.3.3/kernel/"]="mod-simple.ko"
+    ["test-modprobe/oldkernel-force$MODULE_DIRECTORY/3.3.3/kernel/"]="mod-simple.ko"
+    ["test-modprobe/alias-to-none$MODULE_DIRECTORY/4.4.4/kernel/"]="mod-simple.ko"
+    ["test-modprobe/module-param-kcmdline$MODULE_DIRECTORY/4.4.4/kernel/"]="mod-simple.ko"
    ["test-modprobe/external/lib/modules/external/"]="mod-simple.ko"
    ["test-modprobe/module-from-abspath/home/foo/"]="mod-simple.ko"
    ["test-modprobe/module-from-relpath/home/foo/"]="mod-simple.ko"
-    ["test-depmod/modules-order-compressed/lib/modules/4.4.4/kernel/drivers/block/cciss.ko"]="mod-fake-cciss.ko"
-    ["test-depmod/modules-order-compressed/lib/modules/4.4.4/kernel/drivers/scsi/hpsa.ko"]="mod-fake-hpsa.ko"
-    ["test-depmod/modules-order-compressed/lib/modules/4.4.4/kernel/drivers/scsi/scsi_mod.ko"]="mod-fake-scsi-mod.ko"
-    ["test-depmod/modules-outdir/lib/modules/4.4.4/kernel/drivers/block/cciss.ko"]="mod-fake-cciss.ko"
-    ["test-depmod/modules-outdir/lib/modules/4.4.4/kernel/drivers/scsi/hpsa.ko"]="mod-fake-hpsa.ko"
-    ["test-depmod/modules-outdir/lib/modules/4.4.4/kernel/drivers/scsi/scsi_mod.ko"]="mod-fake-scsi-mod.ko"
+    ["test-depmod/modules-order-compressed$MODULE_DIRECTORY/4.4.4/kernel/drivers/block/cciss.ko"]="mod-fake-cciss.ko"
+    ["test-depmod/modules-order-compressed$MODULE_DIRECTORY/4.4.4/kernel/drivers/scsi/hpsa.ko"]="mod-fake-hpsa.ko"
+    ["test-depmod/modules-order-compressed$MODULE_DIRECTORY/4.4.4/kernel/drivers/scsi/scsi_mod.ko"]="mod-fake-scsi-mod.ko"
+    ["test-depmod/modules-outdir$MODULE_DIRECTORY/4.4.4/kernel/drivers/block/cciss.ko"]="mod-fake-cciss.ko"
+    ["test-depmod/modules-outdir$MODULE_DIRECTORY/4.4.4/kernel/drivers/scsi/hpsa.ko"]="mod-fake-hpsa.ko"
+    ["test-depmod/modules-outdir$MODULE_DIRECTORY/4.4.4/kernel/drivers/scsi/scsi_mod.ko"]="mod-fake-scsi-mod.ko"
    ["test-modinfo/mod-simple-i386.ko"]="mod-simple-i386.ko"
    ["test-modinfo/mod-simple-x86_64.ko"]="mod-simple-x86_64.ko"
    ["test-modinfo/mod-simple-sparc64.ko"]="mod-simple-sparc64.ko"
@@ -90,20 +103,20 @@ map=(
    ["test-modinfo/mod-simple-sha256.ko"]="mod-simple.ko"
    ["test-modinfo/mod-simple-pkcs7.ko"]="mod-simple.ko"
    ["test-modinfo/external/lib/modules/external/mod-simple.ko"]="mod-simple.ko"
-    ["test-tools/insert/lib/modules/4.4.4/kernel/"]="mod-simple.ko"
-    ["test-tools/remove/lib/modules/4.4.4/kernel/"]="mod-simple.ko"
+    ["test-tools/insert$MODULE_DIRECTORY/4.4.4/kernel/"]="mod-simple.ko"
+    ["test-tools/remove$MODULE_DIRECTORY/4.4.4/kernel/"]="mod-simple.ko"
)

gzip_array=(
-    "test-depmod/modules-order-compressed/lib/modules/4.4.4/kernel/drivers/block/cciss.ko"
+    "test-depmod/modules-order-compressed$MODULE_DIRECTORY/4.4.4/kernel/drivers/block/cciss.ko"
    )

xz_array=(
-    "test-depmod/modules-order-compressed/lib/modules/4.4.4/kernel/drivers/scsi/scsi_mod.ko"
+    "test-depmod/modules-order-compressed$MODULE_DIRECTORY/4.4.4/kernel/drivers/scsi/scsi_mod.ko"
    )

zstd_array=(
-    "test-depmod/modules-order-compressed/lib/modules/4.4.4/kernel/drivers/scsi/hpsa.ko"
+    "test-depmod/modules-order-compressed$MODULE_DIRECTORY/4.4.4/kernel/drivers/scsi/hpsa.ko"
    )

attach_sha256_array=(
diff --git a/testsuite/test-depmod.c b/testsuite/test-depmod.c
index 93606947f18a..c96dbf0a62be 100644
--- a/testsuite/test-depmod.c
+++ b/testsuite/test-depmod.c
@@ -27,7 +27,7 @@

#define MODULES_UNAME "4.4.4"
#define MODULES_ORDER_ROOTFS TESTSUITE_ROOTFS "test-depmod/modules-order-compressed"
-#define MODULES_ORDER_LIB_MODULES MODULES_ORDER_ROOTFS "/lib/modules/" MODULES_UNAME
+#define MODULES_ORDER_LIB_MODULES MODULES_ORDER_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_modules_order_for_compressed(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
@@ -55,8 +55,8 @@ DEFINE_TEST(depmod_modules_order_for_compressed,
	});

#define MODULES_OUTDIR_ROOTFS TESTSUITE_ROOTFS "test-depmod/modules-outdir"
-#define MODULES_OUTDIR_LIB_MODULES_OUTPUT MODULES_OUTDIR_ROOTFS "/outdir/lib/modules/" MODULES_UNAME
-#define MODULES_OUTDIR_LIB_MODULES_INPUT MODULES_OUTDIR_ROOTFS "/lib/modules/" MODULES_UNAME
+#define MODULES_OUTDIR_LIB_MODULES_OUTPUT MODULES_OUTDIR_ROOTFS "/outdir" MODULE_DIRECTORY "/" MODULES_UNAME
+#define MODULES_OUTDIR_LIB_MODULES_INPUT MODULES_OUTDIR_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_modules_outdir(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
@@ -87,7 +87,7 @@ DEFINE_TEST(depmod_modules_outdir,
	});

#define SEARCH_ORDER_SIMPLE_ROOTFS TESTSUITE_ROOTFS "test-depmod/search-order-simple"
-#define SEARCH_ORDER_SIMPLE_LIB_MODULES SEARCH_ORDER_SIMPLE_ROOTFS "/lib/modules/" MODULES_UNAME
+#define SEARCH_ORDER_SIMPLE_LIB_MODULES SEARCH_ORDER_SIMPLE_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_search_order_simple(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
@@ -114,7 +114,7 @@ DEFINE_TEST(depmod_search_order_simple,
	});

#define SEARCH_ORDER_SAME_PREFIX_ROOTFS TESTSUITE_ROOTFS "test-depmod/search-order-same-prefix"
-#define SEARCH_ORDER_SAME_PREFIX_LIB_MODULES SEARCH_ORDER_SAME_PREFIX_ROOTFS "/lib/modules/" MODULES_UNAME
+#define SEARCH_ORDER_SAME_PREFIX_LIB_MODULES SEARCH_ORDER_SAME_PREFIX_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_search_order_same_prefix(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
@@ -164,7 +164,7 @@ DEFINE_TEST(depmod_detect_loop,
	});

#define SEARCH_ORDER_EXTERNAL_FIRST_ROOTFS TESTSUITE_ROOTFS "test-depmod/search-order-external-first"
-#define SEARCH_ORDER_EXTERNAL_FIRST_LIB_MODULES SEARCH_ORDER_EXTERNAL_FIRST_ROOTFS "/lib/modules/" MODULES_UNAME
+#define SEARCH_ORDER_EXTERNAL_FIRST_LIB_MODULES SEARCH_ORDER_EXTERNAL_FIRST_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_search_order_external_first(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
@@ -191,7 +191,7 @@ DEFINE_TEST(depmod_search_order_external_first,
	});

#define SEARCH_ORDER_EXTERNAL_LAST_ROOTFS TESTSUITE_ROOTFS "test-depmod/search-order-external-last"
-#define SEARCH_ORDER_EXTERNAL_LAST_LIB_MODULES SEARCH_ORDER_EXTERNAL_LAST_ROOTFS "/lib/modules/" MODULES_UNAME
+#define SEARCH_ORDER_EXTERNAL_LAST_LIB_MODULES SEARCH_ORDER_EXTERNAL_LAST_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_search_order_external_last(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
@@ -218,7 +218,7 @@ DEFINE_TEST(depmod_search_order_external_last,
	});

#define SEARCH_ORDER_OVERRIDE_ROOTFS TESTSUITE_ROOTFS "test-depmod/search-order-override"
-#define SEARCH_ORDER_OVERRIDE_LIB_MODULES SEARCH_ORDER_OVERRIDE_ROOTFS "/lib/modules/" MODULES_UNAME
+#define SEARCH_ORDER_OVERRIDE_LIB_MODULES SEARCH_ORDER_OVERRIDE_ROOTFS MODULE_DIRECTORY "/" MODULES_UNAME
static noreturn int depmod_search_order_override(const struct test *t)
{
	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
diff --git a/testsuite/test-testsuite.c b/testsuite/test-testsuite.c
index 56e73609f204..c77c4bbc04eb 100644
--- a/testsuite/test-testsuite.c
+++ b/testsuite/test-testsuite.c
@@ -64,7 +64,7 @@ static int testsuite_rootfs_fopen(const struct test *t)
	char s[100];
	int n;

-	fp = fopen("/lib/modules/a", "r");
+	fp = fopen(MODULE_DIRECTORY "/a", "r");
	if (fp == NULL)
		return EXIT_FAILURE;;

@@ -89,7 +89,7 @@ static int testsuite_rootfs_open(const struct test *t)
	char buf[100];
	int fd, done;

-	fd = open("/lib/modules/a", O_RDONLY);
+	fd = open(MODULE_DIRECTORY "/a", O_RDONLY);
	if (fd < 0)
		return EXIT_FAILURE;

@@ -121,12 +121,12 @@ static int testsuite_rootfs_stat_access(const struct test *t)
{
	struct stat st;

-	if (access("/lib/modules/a", F_OK) < 0) {
+	if (access(MODULE_DIRECTORY "/a", F_OK) < 0) {
		ERR("access failed: %m\n");
		return EXIT_FAILURE;
	}

-	if (stat("/lib/modules/a", &st) < 0) {
+	if (stat(MODULE_DIRECTORY "/a", &st) < 0) {
		ERR("stat failed: %m\n");
		return EXIT_FAILURE;
	}
diff --git a/tools/depmod.c b/tools/depmod.c
index 7e9339923809..22bc1d87c83e 100644
--- a/tools/depmod.c
+++ b/tools/depmod.c
@@ -911,7 +911,7 @@ struct vertex;
struct mod {
	struct kmod_module *kmod;
	char *path;
-	const char *relpath; /* path relative to '$ROOT/lib/modules/$VER/' */
+	const char *relpath; /* path relative to '$ROOT$MODULE_DIRECTORY/$VER/' */
	char *uncrelpath; /* same as relpath but ending in .ko */
	struct kmod_list *info_list;
	struct kmod_list *dep_sym_list;
@@ -3024,11 +3024,11 @@ static int do_depmod(int argc, char *argv[])
	}

	cfg.dirnamelen = snprintf(cfg.dirname, PATH_MAX,
-				  "%s/lib/modules/%s",
+				  "%s" MODULE_DIRECTORY "/%s",
				  root ?: "", cfg.kversion);

	cfg.outdirnamelen = snprintf(cfg.outdirname, PATH_MAX,
-				     "%s/lib/modules/%s",
+				     "%s" MODULE_DIRECTORY "/%s",
				     out_root ?: (root ?: ""), cfg.kversion);

	if (optind == argc)
diff --git a/tools/kmod.c b/tools/kmod.c
index a684c1d24284..3a2589c67447 100644
--- a/tools/kmod.c
+++ b/tools/kmod.c
@@ -115,6 +115,7 @@ static int kmod_config(int argc, char *argv[])
	unsigned i;
	printf("{\"prefix\":\"" PREFIX "\""
			",\"sysconfdir\":\"" SYSCONFDIR "\""
+			",\"module_directory\":\"" MODULE_DIRECTORY "\""
			",\"module_signature\":["
#ifdef ENABLE_OPENSSL
			"\"PKCS#7\","
diff --git a/tools/modinfo.c b/tools/modinfo.c
index d0aab200af4e..cacc32dc4c40 100644
--- a/tools/modinfo.c
+++ b/tools/modinfo.c
@@ -367,7 +367,7 @@ static void help(void)
		"\t-m, --modname               Handle argument as module name instead of alias or filename\n"
		"\t-F, --field=FIELD           Print only provided FIELD\n"
		"\t-k, --set-version=VERSION   Use VERSION instead of `uname -r`\n"
-		"\t-b, --basedir=DIR           Use DIR as filesystem root for /lib/modules\n"
+		"\t-b, --basedir=DIR           Use DIR as filesystem root for " MODULE_DIRECTORY "\n"
		"\t-V, --version               Show version\n"
		"\t-h, --help                  Show this help\n",
		program_invocation_short_name);
@@ -462,7 +462,7 @@ static int do_modinfo(int argc, char *argv[])
			}
			kversion = u.release;
		}
-		snprintf(dirname_buf, sizeof(dirname_buf), "%s/lib/modules/%s",
+		snprintf(dirname_buf, sizeof(dirname_buf), "%s" MODULE_DIRECTORY "/%s",
			 root, kversion);
		dirname = dirname_buf;
	}
diff --git a/tools/modprobe.c b/tools/modprobe.c
index e891028349a8..5306bef250da 100644
--- a/tools/modprobe.c
+++ b/tools/modprobe.c
@@ -142,7 +142,7 @@ static void help(void)
		"\t-n, --show                  Same as --dry-run\n"

		"\t-C, --config=FILE           Use FILE instead of default search paths\n"
-		"\t-d, --dirname=DIR           Use DIR as filesystem root for /lib/modules\n"
+		"\t-d, --dirname=DIR           Use DIR as filesystem root for " MODULE_DIRECTORY "\n"
		"\t-S, --set-version=VERSION   Use VERSION instead of `uname -r`\n"

		"\t-s, --syslog                print to syslog, not stderr\n"
@@ -999,7 +999,7 @@ static int do_modprobe(int argc, char **orig_argv)
			kversion = u.release;
		}
		snprintf(dirname_buf, sizeof(dirname_buf),
-				"%s/lib/modules/%s", root,
+				"%s" MODULE_DIRECTORY "/%s", root,
				kversion);
		dirname = dirname_buf;
	}
diff --git a/tools/static-nodes.c b/tools/static-nodes.c
index 8d2356da73f3..5ef3743e967b 100644
--- a/tools/static-nodes.c
+++ b/tools/static-nodes.c
@@ -212,15 +212,15 @@ static int do_static_nodes(int argc, char *argv[])
		goto finish;
	}

-	snprintf(modules, sizeof(modules), "/lib/modules/%s/modules.devname", kernel.release);
+	snprintf(modules, sizeof(modules), MODULE_DIRECTORY "/%s/modules.devname", kernel.release);
	in = fopen(modules, "re");
	if (in == NULL) {
		if (errno == ENOENT) {
-			fprintf(stderr, "Warning: /lib/modules/%s/modules.devname not found - ignoring\n",
+			fprintf(stderr, "Warning: " MODULE_DIRECTORY "/%s/modules.devname not found - ignoring\n",
				kernel.release);
			ret = EXIT_SUCCESS;
		} else {
-			fprintf(stderr, "Error: could not open /lib/modules/%s/modules.devname - %m\n",
+			fprintf(stderr, "Error: could not open " MODULE_DIRECTORY "/%s/modules.devname - %m\n",
				kernel.release);
			ret = EXIT_FAILURE;
		}
--
2.41.0




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