diff mbox series

[net-next,v2,1/6] skb: add skb_vlan_flush helper

Message ID 20240814130618.2885431-2-boris.sukholitko@broadcom.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series tc: adjust network header after 2nd vlan push | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 4 of 4 maintainers
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 29 this patch: 29
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 54 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 54 this patch: 54
netdev/source_inline success Was 0 now: 0

Commit Message

Boris Sukholitko Aug. 14, 2024, 1:06 p.m. UTC 
Refactor flushing of the inner vlan in the skb_vlan_push by moving the code
into static skb_vlan_flush helper.

Signed-off-by: Boris Sukholitko <boris.sukholitko@broadcom.com>
---
 net/core/skbuff.c | 40 ++++++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 16 deletions(-)
diff mbox series

Patch

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 83f8cd8aa2d1..23f0db1db048 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -6220,30 +6220,38 @@  int skb_vlan_pop(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(skb_vlan_pop);
 
+static int skb_vlan_flush(struct sk_buff *skb)
+{
+	int offset = skb->data - skb_mac_header(skb);
+	int err;
+
+	if (WARN_ONCE(offset,
+		      "skb_vlan_push got skb with skb->data not at mac header (offset %d)\n",
+		      offset)) {
+		return -EINVAL;
+	}
+
+	err = __vlan_insert_tag(skb, skb->vlan_proto,
+				skb_vlan_tag_get(skb));
+	if (err)
+		return err;
+
+	skb->protocol = skb->vlan_proto;
+	skb->mac_len += VLAN_HLEN;
+
+	skb_postpush_rcsum(skb, skb->data + (2 * ETH_ALEN), VLAN_HLEN);
+	return 0;
+}
+
 /* Push a vlan tag either into hwaccel or into payload (if hwaccel tag present).
  * Expects skb->data at mac header.
  */
 int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci)
 {
 	if (skb_vlan_tag_present(skb)) {
-		int offset = skb->data - skb_mac_header(skb);
-		int err;
-
-		if (WARN_ONCE(offset,
-			      "skb_vlan_push got skb with skb->data not at mac header (offset %d)\n",
-			      offset)) {
-			return -EINVAL;
-		}
-
-		err = __vlan_insert_tag(skb, skb->vlan_proto,
-					skb_vlan_tag_get(skb));
+		int err = skb_vlan_flush(skb);
 		if (err)
 			return err;
-
-		skb->protocol = skb->vlan_proto;
-		skb->mac_len += VLAN_HLEN;
-
-		skb_postpush_rcsum(skb, skb->data + (2 * ETH_ALEN), VLAN_HLEN);
 	}
 	__vlan_hwaccel_put_tag(skb, vlan_proto, vlan_tci);
 	return 0;