depmod: Introduce outdir option

This option is equivalent to basedir, with the small difference being
that's where the meta-data files are generated. In other words, this
allows us to have read-only input modules and modules.dep, while still
being able to generate the meta-data files.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
[ Move files to a different dir so input files (produced by kernel build
  system is separate from the files generated by depmod (output) ]
Signed-off-by: Lucas De Marchi <lucas.demarchi@gmail.com>

6 files changed, 86 insertions, 0 deletions

diff --git a/testsuite/populate-modules.sh b/testsuite/populate-modules.sh
index aa6d5c2..5009cac 100755
--- a/testsuite/populate-modules.sh
+++ b/testsuite/populate-modules.sh
@@ -61,6 +61,9 @@ map=(
     ["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-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"
diff --git a/testsuite/rootfs-pristine/test-depmod/modules-outdir/correct-modules.alias b/testsuite/rootfs-pristine/test-depmod/modules-outdir/correct-modules.alias
new file mode 100644
index 0000000..5675329
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-depmod/modules-outdir/correct-modules.alias
@@ -0,0 +1,37 @@
+# Aliases extracted from modules themselves.
+alias pci:v0000103Cd00003230sv0000103Csd0000323Dbc*sc*i* cciss
+alias pci:v0000103Cd00003230sv0000103Csd00003237bc*sc*i* cciss
+alias pci:v0000103Cd00003238sv0000103Csd00003215bc*sc*i* cciss
+alias pci:v0000103Cd00003238sv0000103Csd00003214bc*sc*i* cciss
+alias pci:v0000103Cd00003238sv0000103Csd00003213bc*sc*i* cciss
+alias pci:v0000103Cd00003238sv0000103Csd00003212bc*sc*i* cciss
+alias pci:v0000103Cd00003238sv0000103Csd00003211bc*sc*i* cciss
+alias pci:v0000103Cd00003230sv0000103Csd00003235bc*sc*i* cciss
+alias pci:v0000103Cd00003230sv0000103Csd00003234bc*sc*i* cciss
+alias pci:v0000103Cd00003230sv0000103Csd00003223bc*sc*i* cciss
+alias pci:v0000103Cd00003220sv0000103Csd00003225bc*sc*i* cciss
+alias pci:v00000E11d00000046sv00000E11sd0000409Dbc*sc*i* cciss
+alias pci:v00000E11d00000046sv00000E11sd0000409Cbc*sc*i* cciss
+alias pci:v00000E11d00000046sv00000E11sd0000409Bbc*sc*i* cciss
+alias pci:v00000E11d00000046sv00000E11sd0000409Abc*sc*i* cciss
+alias pci:v00000E11d00000046sv00000E11sd00004091bc*sc*i* cciss
+alias pci:v00000E11d0000B178sv00000E11sd00004083bc*sc*i* cciss
+alias pci:v00000E11d0000B178sv00000E11sd00004082bc*sc*i* cciss
+alias pci:v00000E11d0000B178sv00000E11sd00004080bc*sc*i* cciss
+alias pci:v00000E11d0000B060sv00000E11sd00004070bc*sc*i* cciss
+alias pci:v0000103Cd*sv*sd*bc01sc04i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003356bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003355bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003354bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003353bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003352bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003351bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Bsv0000103Csd00003350bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd00003233bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd0000324Bbc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd0000324Abc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd00003249bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd00003247bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd00003245bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd00003243bc*sc*i* hpsa
+alias pci:v0000103Cd0000323Asv0000103Csd00003241bc*sc*i* hpsa
diff --git a/testsuite/rootfs-pristine/test-depmod/modules-outdir/correct-modules.dep b/testsuite/rootfs-pristine/test-depmod/modules-outdir/correct-modules.dep
new file mode 100644
index 0000000..ec50ac3
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-depmod/modules-outdir/correct-modules.dep
@@ -0,0 +1,3 @@
+kernel/drivers/block/cciss.ko:
+kernel/drivers/scsi/scsi_mod.ko:
+kernel/drivers/scsi/hpsa.ko: kernel/drivers/scsi/scsi_mod.ko
diff --git a/testsuite/rootfs-pristine/test-depmod/modules-outdir/lib/modules/4.4.4/modules.builtin b/testsuite/rootfs-pristine/test-depmod/modules-outdir/lib/modules/4.4.4/modules.builtin
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-depmod/modules-outdir/lib/modules/4.4.4/modules.builtin
diff --git a/testsuite/rootfs-pristine/test-depmod/modules-outdir/lib/modules/4.4.4/modules.order b/testsuite/rootfs-pristine/test-depmod/modules-outdir/lib/modules/4.4.4/modules.order
new file mode 100644
index 0000000..4b64309
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-depmod/modules-outdir/lib/modules/4.4.4/modules.order
@@ -0,0 +1,7 @@
+#336
+kernel/drivers/block/cciss.ko
+#2094
+kernel/drivers/scsi/scsi_mod.ko
+#2137
+kernel/drivers/scsi/hpsa.ko
+
diff --git a/testsuite/test-depmod.c b/testsuite/test-depmod.c
index d7802d7..6e3ae56 100644
--- a/testsuite/test-depmod.c
+++ b/testsuite/test-depmod.c
@@ -57,6 +57,42 @@ DEFINE_TEST(depmod_modules_order_for_compressed,
 		},
 	});
 
+#define MODULES_OUTDIR_UNAME "4.4.4"
+#define MODULES_OUTDIR_ROOTFS TESTSUITE_ROOTFS "test-depmod/modules-outdir"
+#define MODULES_OUTDIR_LIB_MODULES_OUTPUT MODULES_OUTDIR_ROOTFS "/outdir/lib/modules/" MODULES_OUTDIR_UNAME
+#define MODULES_OUTDIR_LIB_MODULES_INPUT MODULES_OUTDIR_ROOTFS "/lib/modules/" MODULES_OUTDIR_UNAME
+static noreturn int depmod_modules_outdir(const struct test *t)
+{
+	const char *progname = ABS_TOP_BUILDDIR "/tools/depmod";
+	const char *const args[] = {
+		progname,
+		"--outdir", MODULES_OUTDIR_ROOTFS "/outdir/",
+		NULL,
+	};
+
+	test_spawn_prog(progname, args);
+	exit(EXIT_FAILURE);
+}
+
+DEFINE_TEST(depmod_modules_outdir,
+#if defined(KMOD_SYSCONFDIR_NOT_ETC)
+        .skip = true,
+#endif
+	.description = "check if depmod honours the outdir option",
+	.config = {
+		[TC_UNAME_R] = MODULES_OUTDIR_UNAME,
+		[TC_ROOTFS] = MODULES_OUTDIR_ROOTFS,
+	},
+	.output = {
+		.files = (const struct keyval[]) {
+			{ MODULES_OUTDIR_LIB_MODULES_OUTPUT "/modules.dep",
+			  MODULES_OUTDIR_ROOTFS "/correct-modules.dep" },
+			{ MODULES_OUTDIR_LIB_MODULES_OUTPUT "/modules.alias",
+			  MODULES_OUTDIR_ROOTFS "/correct-modules.alias" },
+			{ }
+		},
+	});
+
 #define SEARCH_ORDER_SIMPLE_ROOTFS TESTSUITE_ROOTFS "test-depmod/search-order-simple"
 static noreturn int depmod_search_order_simple(const struct test *t)
 {