RDMA Core: make libibverbs plugins relocatable

Allow overriding the libibverbs configuration directory setting the
environment variable VERBS_CONFIG_DIR.

Set VERBS_CONFIG_DIR in the scram tool to point to the libibverbs
configuration directory.

Include the libibverbs configuration directory in the package. Update
the libibverbs configuration to include the full path to the plugins,
and relocate them in the post-install section.

Include the user binaries in the package.

Author: fwyzard

rdma-core-VERBS_CONFIG_DIR.patch

@@ -0,0 +1,42 @@
+diff --git a/libibverbs/dynamic_driver.c b/libibverbs/dynamic_driver.c
+index 7fa4233..c2ff2bb 100644
+--- a/libibverbs/dynamic_driver.c
++++ b/libibverbs/dynamic_driver.c
+@@ -115,27 +115,33 @@ static void read_config_file(const char *path)
+ 
+ static void read_config(void)
+ {
++	char *verbs_config_dir;
+ 	DIR *conf_dir;
+ 	struct dirent *dent;
+ 	char *path;
+ 
+-	conf_dir = opendir(IBV_CONFIG_DIR);
++	verbs_config_dir = getenv("VERBS_CONFIG_DIR");
++	if (!verbs_config_dir) {
++		verbs_config_dir = IBV_CONFIG_DIR;
++	}
++
++	conf_dir = opendir(verbs_config_dir);
+ 	if (!conf_dir) {
+ 		fprintf(stderr,
+ 			PFX "Warning: couldn't open config directory '%s'.\n",
+-			IBV_CONFIG_DIR);
++			verbs_config_dir);
+ 		return;
+ 	}
+ 
+ 	while ((dent = readdir(conf_dir))) {
+ 		struct stat buf;
+ 
+-		if (asprintf(&path, "%s/%s", IBV_CONFIG_DIR, dent->d_name) <
++		if (asprintf(&path, "%s/%s", verbs_config_dir, dent->d_name) <
+ 		    0) {
+ 			fprintf(stderr,
+ 				PFX
+ 				"Warning: couldn't read config file %s/%s.\n",
+-				IBV_CONFIG_DIR, dent->d_name);
++				verbs_config_dir, dent->d_name);
+ 			goto out;
+ 		}
+ 

rdma-core.spec

@@ -2,10 +2,12 @@
 ## INITENV +PATH LD_LIBRARY_PATH %{i}/lib64
 
 Source: https://github.com/linux-rdma/%{n}/releases/download/v%{realversion}/rdma-core-%{realversion}.tar.gz
+Patch: rdma-core-VERBS_CONFIG_DIR
 BuildRequires: cmake ninja
 
 %prep
 %setup -q -n %{n}-%{realversion}
+%patch -p1
 
 %build
 rm -rf build
@@ -33,10 +35,19 @@ ninja -v %{makeprocesses} install
 # remove pkg-config to avoid rpm-generated dependency on /usr/bin/pkg-config
 rm -rf %{i}/lib64/pkgconfig
 
-# keep only the libraries and include files
-rm -rf %{i}/bin
-rm -rf %{i}/etc
+# keep only the user binaries, libibverbs configuration, libraries and include files
+rm -rf %{i}/etc/infiniband-diags
+rm -rf %{i}/etc/init.d
+rm -rf %{i}/etc/modprobe.d
+rm -rf %{i}/etc/rdma
 rm -rf %{i}/lib
 rm -rf %{i}/libexec
 rm -rf %{i}/sbin
-rm -rf %{i}/share
+rm -rf %{i}/share/perl5
+
+# update the libibverbs plugins with the full path
+sed -e's#driver \(\w\+\)#driver %{i}/lib64/libibverbs/lib\1#' -i %{i}/etc/libibverbs.d/*
+
+%post
+# relocate the libibverbs plugins path
+%{relocateConfig}etc/libibverbs.d/*

scram-tools.file/tools/rdma-core/rdma-core.xml

@@ -5,5 +5,7 @@
     <environment name="LIBDIR"         default="$RDMA_CORE_BASE/lib64"/>
     <environment name="INCLUDE"        default="$RDMA_CORE_BASE/include"/>
   </client>
+  <runtime name="PATH" value="$RDMA_CORE_BASE/bin" type="path"/>
   <runtime name="ROOT_INCLUDE_PATH" value="$INCLUDE" type="path"/>
+  <runtime name="VERBS_CONFIG_DIR" value="$RDMA_CORE_BASE/etc/libibverbs.d" type="path"/>
 </tool>