netdev - [PATCH net-next v2 1/6] skbuff: Add skb_list

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1422574164-1860-1-git-send-email-pshelar@nicira.com>
Date:	Thu, 29 Jan 2015 15:29:24 -0800
From:	Pravin B Shelar <pshelar@...ira.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next v2 1/6] skbuff: Add skb_list_linearize()

similar to skb_linearize(), this API takes skb list as arg and
linearize it into one big skb. STT driver patch will use this.

Signed-off-by: Pravin B Shelar <pshelar@...ira.com>
---
Fixed according to comments from Eric.
---
 include/linux/skbuff.h |  2 ++
 net/core/skbuff.c      | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 85ab7d7..c9194c1 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2532,6 +2532,8 @@ static inline int skb_linearize(struct sk_buff *skb)
 	return skb_is_nonlinear(skb) ? __skb_linearize(skb) : 0;
 }
 
+int skb_list_linearize(struct sk_buff *head, gfp_t gfp_mask);
+
 /**
  * skb_has_shared_frag - can any frag be overwritten
  * @skb: buffer to test
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 56db472..d6358a7 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2329,6 +2329,40 @@ void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
 }
 EXPORT_SYMBOL(skb_copy_and_csum_dev);
 
+int skb_list_linearize(struct sk_buff *head, gfp_t gfp_mask)
+{
+	struct sk_buff *skb;
+	int tlen = 0;
+	int err;
+
+	err = skb_linearize(head);
+	if (err)
+		return err;
+
+	skb = head->next;
+	while (skb) {
+		tlen += skb->len;
+		skb = skb->next;
+	}
+	err = pskb_expand_head(head, 0, tlen, gfp_mask);
+	if (err)
+		return err;
+
+	skb = head->next;
+	while (skb) {
+		err = skb_copy_bits(skb, 0, skb_tail_pointer(head), skb->len);
+		if (err)
+			return err;
+		head->tail += skb->len;
+		skb = skb->next;
+	}
+	kfree_skb_list(head->next);
+	head->next = NULL;
+	head->len += tlen;
+	return 0;
+}
+EXPORT_SYMBOL(skb_list_linearize);
+
 /**
  *	skb_dequeue - remove from the head of the queue
  *	@list: list to dequeue from
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html