[dm-devel] [PATCH v2 10/12] libmpathpersist: add linker version script

[mwilck at suse.com]

From: Martin Wilck <mwilck at suse.com>

This defines the ABI of libmpathpersist in the current state.
The initial version is set to "LIBMPATHPERSIST_1.0.0".

Reviewed-by: Benjamin Marzinski <bmarzins at redhat.com>
Signed-off-by: Martin Wilck <mwilck at suse.com>
---
 libmpathpersist/Makefile                |  6 +++--
 libmpathpersist/libmpathpersist.version | 32 +++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)
 create mode 100644 libmpathpersist/libmpathpersist.version

diff --git a/libmpathpersist/Makefile b/libmpathpersist/Makefile
index 9e869fd..456ce4c 100644
--- a/libmpathpersist/Makefile
+++ b/libmpathpersist/Makefile
@@ -3,6 +3,7 @@ include ../Makefile.inc
 SONAME = 0
 DEVLIB = libmpathpersist.so
 LIBS = $(DEVLIB).$(SONAME)
+VERSION_SCRIPT := libmpathpersist.version
 
 CFLAGS += $(LIB_CFLAGS) -I$(multipathdir) -I$(mpathpersistdir) -I$(mpathcmddir)
 
@@ -13,8 +14,9 @@ OBJS = mpath_persist.o mpath_updatepr.o mpath_pr_ioctl.o
 
 all: $(DEVLIB) man
 
-$(LIBS): $(OBJS)
-	$(CC) $(LDFLAGS) $(SHARED_FLAGS) $(LIBDEPS) -Wl,-soname=$@ -o $@ $(OBJS)
+$(LIBS): $(OBJS) $(VERSION_SCRIPT)
+	$(CC) $(LDFLAGS) $(SHARED_FLAGS) $(LIBDEPS) -Wl,-soname=$@ \
+		-Wl,--version-script=$(VERSION_SCRIPT) -o $@ $(OBJS)
 
 $(DEVLIB): $(LIBS)
 	$(LN) $(LIBS) $@
diff --git a/libmpathpersist/libmpathpersist.version b/libmpathpersist/libmpathpersist.version
new file mode 100644
index 0000000..dc648ce
--- /dev/null
+++ b/libmpathpersist/libmpathpersist.version
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020 SUSE LLC
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * libmpathpersist ABI
+ *
+ * The ABI of libmpathpersist is supposed to remain stable. Removing symbols
+ * or altering existing symbols' semantics is not allowed. When changing a
+ * a symbol, either use a new name, or explicit symver directives.
+ *
+ * See libmultipath.version for general policy about version numbers.
+ */
+LIBMPATHPERSIST_1.0.0 {
+global:
+
+	__mpath_persistent_reserve_in;
+	__mpath_persistent_reserve_out;
+	dumpHex;
+	mpath_alloc_prin_response;
+	mpath_lib_exit;
+	mpath_lib_init;
+	mpath_mx_alloc_len;
+	mpath_persistent_reserve_in;
+	mpath_persistent_reserve_init_vecs;
+	mpath_persistent_reserve_out;
+	mpath_persistent_reserve_free_vecs;
+	prin_do_scsi_ioctl;
+	prout_do_scsi_ioctl;
+	update_map_pr;
+
+local: *;
+};
-- 
2.28.0