[dpdk-dev] [PATCH v2] usertools: fix pmdinfo parsing

[David Marchand]

This script inspects an ELF file (binary or shared library) and its
linked dependencies by following DT_NEEDED tags.
So far a simple librte_pmd prefix was used as a filter.
Now that we changed the driver library names, update this heuristic with
an explicit list of all driver classes.

Fixes: a20b2c01a7a1 ("build: standardize component names and defines")

Signed-off-by: David Marchand <david.marchand at redhat.com>
Acked-by: Robin Jarry <robin.jarry at 6wind.com>
---
Changelog since v1:
- moved driver classes list as a class variable and did some cosmetic
  change for readibility,
- used dpdk_driver_classes variable name in the hope that someone changing
  meson will catch this script too,
- added bus, common, mempool and raw driver classes as some of them do
  carry some pmdinfo stuff and were skipped so far but I found no
  indication this skipping was intended,

---
 usertools/dpdk-pmdinfo.py | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/usertools/dpdk-pmdinfo.py b/usertools/dpdk-pmdinfo.py
index 1661982791..55a55affde 100755
--- a/usertools/dpdk-pmdinfo.py
+++ b/usertools/dpdk-pmdinfo.py
@@ -430,6 +430,20 @@ def get_dt_runpath(self, dynsec):
                 return force_unicode(tag.runpath)
         return ""
 
+    dpdk_driver_classes = (
+        'baseband',
+        'bus',
+        'common',
+        'compress',
+        'crypto',
+        'event',
+        'mempool',
+        'net',
+        'raw',
+        'regex',
+        'vdpa',
+    )
+
     def process_dt_needed_entries(self):
         """ Look to see if there are any DT_NEEDED entries in the binary
             And process those if there are
@@ -450,7 +464,11 @@ def process_dt_needed_entries(self):
         for tag in dynsec.iter_tags():
             # pyelftools may return byte-strings, force decode them
             if force_unicode(tag.entry.d_tag) == 'DT_NEEDED':
-                if 'librte_pmd' in force_unicode(tag.needed):
+                words = force_unicode(tag.needed).split('_')
+                if len(words) < 3:
+                    continue
+                prefix, drv_class = words[:2]
+                if prefix == 'librte' and drv_class in self.dpdk_driver_classes:
                     library = search_file(force_unicode(tag.needed),
                                           runpath + ":" + ldlibpath +
                                           ":/usr/lib64:/lib64:/usr/lib:/lib")
-- 
2.23.0