Support printing of NMX selection method group experimenter property

NMX selection method
Signed-off-by: Simon Horman <simon.hor...@netronome.com>

---
v2 Use list of struct field_array of TLVs rather than OF1.1 match
   for fields field of NMX selection method property
---
 lib/nx-match.c     | 41 +++++++++++++++++++++++++++++++++++++++++
 lib/nx-match.h     |  1 +
 lib/ofp-print.c    | 40 ++++++++++++++++++++++++++++++++--------
 tests/ofp-print.at | 16 ++++++++++++----
 4 files changed, 86 insertions(+), 12 deletions(-)

diff --git a/lib/nx-match.c b/lib/nx-match.c
index 82fcfc2..a9b9dfd 100644
--- a/lib/nx-match.c
+++ b/lib/nx-match.c
@@ -1068,6 +1068,47 @@ oxm_put_match(struct ofpbuf *b, const struct match 
*match,
     return match_len;
 }
 
+/* Appends to 'b' the nx_match format that expresses the tlv corresponding
+ * to 'id'. If mask is not all-ones then it is also formated as the value
+ * of the tlv. */
+static void
+nx_format_mask_tlv(struct ds *ds, enum mf_field_id id,
+                   const union mf_value *mask)
+{
+    const struct mf_field *mf = mf_from_id(id);
+
+    ds_put_format(ds, "%s", mf->name);
+
+    if (!is_all_ones(mask, mf->n_bytes)) {
+        ds_put_char(ds, '=');
+        mf_format(mf, mask, NULL, ds);
+    }
+
+    ds_put_char(ds, ',');
+}
+
+/* Appends a string representation of 'fa_' to 'ds'.
+ * The TLVS value of 'fa_' is treated as a mask and
+ * only the name of fields is formated if it is all ones.
+ *
+ * Returns 0 on success, an ofperr value otherwise */
+int
+oxm_format_field_array(struct ds *ds, const struct ovs_list *field_array)
+{
+    size_t start_len = ds->length;
+    const struct field_array *fa;
+
+    LIST_FOR_EACH (fa, list_node, field_array) {
+        nx_format_mask_tlv(ds, fa->id, &fa->value);
+    }
+
+    if (ds->length > start_len) {
+        ds_chomp(ds, ',');
+    }
+
+    return 0;
+}
+
 /* Appends to 'b' a series of OXM TLVs corresponding to the series
  * of enum mf_field_id and value tuples in 'fa_'.
  *
diff --git a/lib/nx-match.h b/lib/nx-match.h
index 14cd67a..1764aee 100644
--- a/lib/nx-match.h
+++ b/lib/nx-match.h
@@ -61,6 +61,7 @@ enum ofperr oxm_pull_field_array(const void *, size_t 
fields_len,
 int nx_put_match(struct ofpbuf *, const struct match *,
                  ovs_be64 cookie, ovs_be64 cookie_mask);
 int oxm_put_match(struct ofpbuf *, const struct match *, enum ofp_version);
+int oxm_format_field_array(struct ds *, const struct ovs_list *);
 int oxm_put_field_array(struct ofpbuf *, const struct ovs_list *,
                         enum ofp_version version);
 
diff --git a/lib/ofp-print.c b/lib/ofp-print.c
index a596979..c3a6d07 100644
--- a/lib/ofp-print.c
+++ b/lib/ofp-print.c
@@ -2147,8 +2147,8 @@ ofp_print_bucket_id(struct ds *s, const char *label, 
uint32_t bucket_id,
 
 static void
 ofp_print_group(struct ds *s, uint32_t group_id, uint8_t type,
-                struct ovs_list *p_buckets, enum ofp_version ofp_version,
-                bool suppress_type)
+                struct ovs_list *p_buckets, struct ofputil_group_props *props,
+                enum ofp_version ofp_version, bool suppress_type)
 {
     struct ofputil_bucket *bucket;
 
@@ -2160,6 +2160,28 @@ ofp_print_group(struct ds *s, uint32_t group_id, uint8_t 
type,
         ds_put_format(s, ",type=%s", type_str[type > 4 ? 4 : type]);
     }
 
+    if (props->selection_method[0]) {
+        size_t mark, start;
+
+        ds_put_format(s, ",selection_method=%s,", props->selection_method);
+        if (props->selection_method_param) {
+            ds_put_format(s, "selection_method_param=%"PRIu64",",
+                          props->selection_method_param);
+        }
+
+        /* Allow rewinding to immediately before the trailing ',' */
+        mark = s->length - 1;
+
+        ds_put_cstr(s, "fields=");
+        start = s->length;
+        if (oxm_format_field_array(s, &props->fields)) {
+                ds_put_cstr(s, " ***formatting error***");
+        }
+        if (s->length == start) {
+            ds_truncate(s, mark);
+        }
+    }
+
     if (!p_buckets) {
         return;
     }
@@ -2169,7 +2191,8 @@ ofp_print_group(struct ds *s, uint32_t group_id, uint8_t 
type,
     LIST_FOR_EACH (bucket, list_node, p_buckets) {
         ds_put_cstr(s, "bucket=");
 
-        ofp_print_bucket_id(s, "bucket_id:", bucket->bucket_id, ofp_version);
+        ofp_print_bucket_id(s, "bucket_id:", bucket->bucket_id,
+                            ofp_version);
         if (bucket->weight != 1) {
             ds_put_format(s, "weight:%"PRIu16",", bucket->weight);
         }
@@ -2177,7 +2200,8 @@ ofp_print_group(struct ds *s, uint32_t group_id, uint8_t 
type,
             ds_put_format(s, "watch_port:%"PRIu32",", bucket->watch_port);
         }
         if (bucket->watch_group != OFPG11_ANY) {
-            ds_put_format(s, "watch_group:%"PRIu32",", bucket->watch_group);
+            ds_put_format(s, "watch_group:%"PRIu32",",
+                          bucket->watch_group);
         }
 
         ds_put_cstr(s, "actions=");
@@ -2217,8 +2241,8 @@ ofp_print_group_desc(struct ds *s, const struct 
ofp_header *oh)
 
         ds_put_char(s, '\n');
         ds_put_char(s, ' ');
-        ofp_print_group(s, gd.group_id, gd.type, &gd.buckets, oh->version,
-                        false);
+        ofp_print_group(s, gd.group_id, gd.type, &gd.buckets, &gd.props,
+                        oh->version, false);
         ofputil_uninit_group_desc(&gd);
      }
 }
@@ -2371,8 +2395,8 @@ ofp_print_group_mod(struct ds *s, const struct ofp_header 
*oh)
                             gm.command_bucket_id, oh->version);
     }
 
-    ofp_print_group(s, gm.group_id, gm.type, &gm.buckets, oh->version,
-                    bucket_command);
+    ofp_print_group(s, gm.group_id, gm.type, &gm.buckets, &gm.props,
+                    oh->version, bucket_command);
     ofputil_uninit_group_mod(&gm);
 }
 
diff --git a/tests/ofp-print.at b/tests/ofp-print.at
index dc809e2..3978f65 100644
--- a/tests/ofp-print.at
+++ b/tests/ofp-print.at
@@ -2026,7 +2026,7 @@ AT_CLEANUP
 AT_SETUP([OFPST_GROUP_DESC reply - OF1.5])
 AT_KEYWORDS([ofp-print OFPT_STATS_REPLY])
 AT_CHECK([ovs-ofctl ofp-print "\
-06 13 00 98 00 00 00 02 00 07 00 00 00 00 00 00 \
+06 13 00 d8 00 00 00 02 00 07 00 00 00 00 00 00 \
 00 88 01 00 00 00 20 00 00 78 00 00 00 00 00 00 \
 00 28 00 10 00 00 00 00 00 00 00 10 00 00 00 01 \
 00 00 00 00 00 00 00 00 00 00 00 08 00 64 00 00 \
@@ -2037,9 +2037,14 @@ AT_CHECK([ovs-ofctl ofp-print "\
 00 28 00 10 00 00 00 02 00 00 00 10 00 00 00 03 \
 00 00 00 00 00 00 00 00 00 00 00 08 00 c8 00 00 \
 00 01 00 08 00 00 00 03 \
+ff ff 00 3b 00 00 15 40 00 00 00 01 00 00 00 00 \
+68 61 73 68 00 00 00 00 00 00 00 00 00 00 00 00 \
+00 00 00 00 00 00 00 00 \
+80 00 18 04 ff ff ff 00 80 00 1a 02 ff ff 80 00 \
+14 01 ff 00 00 00 00 00 \
 "], [0], [dnl
 OFPST_GROUP_DESC reply (OF1.5) (xid=0x2):
- 
group_id=8192,type=select,bucket=bucket_id:0,weight:100,watch_port:1,actions=output:1,bucket=bucket_id:1,weight:200,watch_port:2,actions=output:2,bucket=bucket_id:2,weight:200,watch_port:3,actions=output:3
+ 
group_id=8192,type=select,selection_method=hash,fields=ip_dst=255.255.255.0,tcp_src,nw_proto,bucket=bucket_id:0,weight:100,watch_port:1,actions=output:1,bucket=bucket_id:1,weight:200,watch_port:2,actions=output:2,bucket=bucket_id:2,weight:200,watch_port:3,actions=output:3
 ])
 AT_CLEANUP
 
@@ -2845,7 +2850,7 @@ AT_CLEANUP
 AT_SETUP([OFPT_GROUP_MOD add - OF1.5])
 AT_KEYWORDS([ofp-print])
 AT_CHECK([ovs-ofctl ofp-print "\
-06 0f 00 90 11 22 33 44 00 00 01 00 87 65 43 21 \
+06 0f 00 b8 11 22 33 44 00 00 01 00 87 65 43 21 \
 00 78 00 00 ff ff ff ff 00 28 00 10 00 00 00 00 \
 00 00 00 10 00 00 00 01 00 00 00 00 00 00 00 00 \
 00 00 00 08 00 64 00 00 00 01 00 08 00 00 00 01 \
@@ -2854,9 +2859,12 @@ AT_CHECK([ovs-ofctl ofp-print "\
 00 01 00 08 00 00 00 02 00 28 00 10 00 00 00 02 \
 00 00 00 10 00 00 00 03 00 00 00 00 00 00 00 00 \
 00 00 00 08 00 c8 00 00 00 01 00 08 00 00 00 03 \
+ff ff 00 28 00 00 15 40 00 00 00 01 00 00 00 00 \
+72 61 6e 64 6f 6d 00 00 00 00 00 00 00 00 00 00 \
+00 00 00 00 00 00 00 07 \
 "], [0], [dnl
 OFPT_GROUP_MOD (OF1.5) (xid=0x11223344):
- ADD 
group_id=2271560481,type=select,bucket=bucket_id:0,weight:100,watch_port:1,actions=output:1,bucket=bucket_id:1,weight:200,watch_port:2,actions=output:2,bucket=bucket_id:2,weight:200,watch_port:3,actions=output:3
+ ADD 
group_id=2271560481,type=select,selection_method=random,selection_method_param=7,bucket=bucket_id:0,weight:100,watch_port:1,actions=output:1,bucket=bucket_id:1,weight:200,watch_port:2,actions=output:2,bucket=bucket_id:2,weight:200,watch_port:3,actions=output:3
 ])
 AT_CLEANUP
 
-- 
2.1.4

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