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[iproute2-next,1/2] bridge: vlan: set vlan option attributes while parsing

Message ID 20210901103816.1163765-2-razor@blackwall.org (mailing list archive)
State Accepted
Delegated to: David Ahern
Headers show
Series bridge: vlan: add support for mcast_router option | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Nikolay Aleksandrov Sept. 1, 2021, 10:38 a.m. UTC 
From: Nikolay Aleksandrov <nikolay@nvidia.com>

Set vlan option attributes immediately while parsing to simplify the
checks, avoid having reserved values (e.g. -1 for unset var) and have
more limited scope for the variables. This is also similar to how global
vlan options are set. The attribute setting and checks are moved with
option parsing, no functional changes intended.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
---
 bridge/vlan.c | 53 ++++++++++++++++++++++++++-------------------------
 1 file changed, 27 insertions(+), 26 deletions(-)
diff mbox series

Patch

diff --git a/bridge/vlan.c b/bridge/vlan.c
index 4ead57b783a8..48365bca4c4a 100644
--- a/bridge/vlan.c
+++ b/bridge/vlan.c
@@ -272,16 +272,24 @@  static int vlan_option_set(int argc, char **argv)
 	};
 	struct bridge_vlan_info vinfo = {};
 	struct rtattr *afspec;
-	short vid_end = -1;
 	char *d = NULL;
 	short vid = -1;
-	int state = -1;
 
+	afspec = addattr_nest(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY);
+	afspec->rta_type |= NLA_F_NESTED;
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();
 			d = *argv;
+			req.bvm.ifindex = ll_name_to_index(d);
+			if (req.bvm.ifindex == 0) {
+				fprintf(stderr,
+					"Cannot find network device \"%s\"\n",
+					d);
+				return -1;
+			}
 		} else if (strcmp(*argv, "vid") == 0) {
+			short vid_end = -1;
 			char *p;
 
 			NEXT_ARG();
@@ -299,8 +307,22 @@  static int vlan_option_set(int argc, char **argv)
 			} else {
 				vid = atoi(*argv);
 			}
+			if (vid >= 4096) {
+				fprintf(stderr, "Invalid VLAN ID \"%hu\"\n",
+					vid);
+				return -1;
+			}
+
+			vinfo.flags = BRIDGE_VLAN_INFO_ONLY_OPTS;
+			vinfo.vid = vid;
+			addattr_l(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY_INFO,
+				  &vinfo, sizeof(vinfo));
+			if (vid_end != -1)
+				addattr16(&req.n, sizeof(req),
+					  BRIDGE_VLANDB_ENTRY_RANGE, vid_end);
 		} else if (strcmp(*argv, "state") == 0) {
 			char *endptr;
+			int state;
 
 			NEXT_ARG();
 			state = strtol(*argv, &endptr, 10);
@@ -310,42 +332,21 @@  static int vlan_option_set(int argc, char **argv)
 				fprintf(stderr, "Error: invalid STP state\n");
 				return -1;
 			}
+			addattr8(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY_STATE,
+				 state);
 		} else {
 			if (matches(*argv, "help") == 0)
 				NEXT_ARG();
 		}
 		argc--; argv++;
 	}
+	addattr_nest_end(&req.n, afspec);
 
 	if (d == NULL || vid == -1) {
 		fprintf(stderr, "Device and VLAN ID are required arguments.\n");
 		return -1;
 	}
 
-	req.bvm.ifindex = ll_name_to_index(d);
-	if (req.bvm.ifindex == 0) {
-		fprintf(stderr, "Cannot find network device \"%s\"\n", d);
-		return -1;
-	}
-
-	if (vid >= 4096) {
-		fprintf(stderr, "Invalid VLAN ID \"%hu\"\n", vid);
-		return -1;
-	}
-	afspec = addattr_nest(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY);
-	afspec->rta_type |= NLA_F_NESTED;
-
-	vinfo.flags = BRIDGE_VLAN_INFO_ONLY_OPTS;
-	vinfo.vid = vid;
-	addattr_l(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY_INFO, &vinfo,
-		  sizeof(vinfo));
-	if (vid_end != -1)
-		addattr16(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY_RANGE,
-			  vid_end);
-	if (state >= 0)
-		addattr8(&req.n, sizeof(req), BRIDGE_VLANDB_ENTRY_STATE, state);
-	addattr_nest_end(&req.n, afspec);
-
 	if (rtnl_talk(&rth, &req.n, NULL) < 0)
 		return -1;