diff mbox series

[v2,net-next,2/5] net: dropreason: propagate drop_reason to skb_release_data()

Message ID 20221029154520.2747444-3-edumazet@google.com (mailing list archive)
State Accepted
Commit 511a3eda2f8d4719114ee3f2c781c37233bd171f
Delegated to: Netdev Maintainers
Headers show
Series inet: add drop monitor support | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 5 this patch: 5
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
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: 2 this patch: 2
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 93 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Eric Dumazet Oct. 29, 2022, 3:45 p.m. UTC 
When an skb with a frag list is consumed, we currently
pretend all skbs in the frag list were dropped.

In order to fix this, add a @reason argument to skb_release_data()
and skb_release_all().

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 net/core/skbuff.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)
diff mbox series

Patch

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 7ce797cd121f395062b61b33371fb638f51e8c99..42a35b59fb1e54e2e4c0ab58a6da016cef622653 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -769,7 +769,7 @@  static void skb_free_head(struct sk_buff *skb)
 	}
 }
 
-static void skb_release_data(struct sk_buff *skb)
+static void skb_release_data(struct sk_buff *skb, enum skb_drop_reason reason)
 {
 	struct skb_shared_info *shinfo = skb_shinfo(skb);
 	int i;
@@ -792,7 +792,7 @@  static void skb_release_data(struct sk_buff *skb)
 
 free_head:
 	if (shinfo->frag_list)
-		kfree_skb_list(shinfo->frag_list);
+		kfree_skb_list_reason(shinfo->frag_list, reason);
 
 	skb_free_head(skb);
 exit:
@@ -855,11 +855,11 @@  void skb_release_head_state(struct sk_buff *skb)
 }
 
 /* Free everything but the sk_buff shell. */
-static void skb_release_all(struct sk_buff *skb)
+static void skb_release_all(struct sk_buff *skb, enum skb_drop_reason reason)
 {
 	skb_release_head_state(skb);
 	if (likely(skb->head))
-		skb_release_data(skb);
+		skb_release_data(skb, reason);
 }
 
 /**
@@ -873,7 +873,7 @@  static void skb_release_all(struct sk_buff *skb)
 
 void __kfree_skb(struct sk_buff *skb)
 {
-	skb_release_all(skb);
+	skb_release_all(skb, SKB_DROP_REASON_NOT_SPECIFIED);
 	kfree_skbmem(skb);
 }
 EXPORT_SYMBOL(__kfree_skb);
@@ -1056,7 +1056,7 @@  EXPORT_SYMBOL(consume_skb);
 void __consume_stateless_skb(struct sk_buff *skb)
 {
 	trace_consume_skb(skb);
-	skb_release_data(skb);
+	skb_release_data(skb, SKB_CONSUMED);
 	kfree_skbmem(skb);
 }
 
@@ -1081,7 +1081,7 @@  static void napi_skb_cache_put(struct sk_buff *skb)
 
 void __kfree_skb_defer(struct sk_buff *skb)
 {
-	skb_release_all(skb);
+	skb_release_all(skb, SKB_DROP_REASON_NOT_SPECIFIED);
 	napi_skb_cache_put(skb);
 }
 
@@ -1119,7 +1119,7 @@  void napi_consume_skb(struct sk_buff *skb, int budget)
 		return;
 	}
 
-	skb_release_all(skb);
+	skb_release_all(skb, SKB_CONSUMED);
 	napi_skb_cache_put(skb);
 }
 EXPORT_SYMBOL(napi_consume_skb);
@@ -1250,7 +1250,7 @@  EXPORT_SYMBOL_GPL(alloc_skb_for_msg);
  */
 struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src)
 {
-	skb_release_all(dst);
+	skb_release_all(dst, SKB_CONSUMED);
 	return __skb_clone(dst, src);
 }
 EXPORT_SYMBOL_GPL(skb_morph);
@@ -1873,7 +1873,7 @@  int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 		if (skb_has_frag_list(skb))
 			skb_clone_fraglist(skb);
 
-		skb_release_data(skb);
+		skb_release_data(skb, SKB_CONSUMED);
 	} else {
 		skb_free_head(skb);
 	}
@@ -6213,7 +6213,7 @@  static int pskb_carve_inside_header(struct sk_buff *skb, const u32 off,
 			skb_frag_ref(skb, i);
 		if (skb_has_frag_list(skb))
 			skb_clone_fraglist(skb);
-		skb_release_data(skb);
+		skb_release_data(skb, SKB_CONSUMED);
 	} else {
 		/* we can reuse existing recount- all we did was
 		 * relocate values
@@ -6356,7 +6356,7 @@  static int pskb_carve_inside_nonlinear(struct sk_buff *skb, const u32 off,
 		kfree(data);
 		return -ENOMEM;
 	}
-	skb_release_data(skb);
+	skb_release_data(skb, SKB_CONSUMED);
 
 	skb->head = data;
 	skb->head_frag = 0;