From: Sven Eckelmann <sven.eckelmann@gmx.de>
To: greg@kroah.com
Cc: b.a.t.m.a.n@lists.open-mesh.org
Subject: [B.A.T.M.A.N.] [PATCH 09/29] Staging: batman-adv: move skb reassembly of fragmented packets into dedicated function
Date: Mon, 22 Nov 2010 00:55:47 +0100 [thread overview]
Message-ID: <1290383767-32602-10-git-send-email-sven.eckelmann@gmx.de> (raw)
In-Reply-To: <1290383767-32602-1-git-send-email-sven.eckelmann@gmx.de>
From: Andreas Langer <an.langer@gmx.de>
Signed-off-by: Andreas Langer <an.langer@gmx.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
---
drivers/staging/batman-adv/routing.c | 43 ++++------------------
drivers/staging/batman-adv/unicast.c | 66 ++++++++++++++++++++++++++++++---
drivers/staging/batman-adv/unicast.h | 10 +----
3 files changed, 69 insertions(+), 50 deletions(-)
diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c
index 295e92e..d36c3f9 100644
--- a/drivers/staging/batman-adv/routing.c
+++ b/drivers/staging/batman-adv/routing.c
@@ -1204,10 +1204,9 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
{
struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
struct unicast_frag_packet *unicast_packet;
- struct orig_node *orig_node;
- struct frag_packet_list_entry *tmp_frag_entry;
int hdr_size = sizeof(struct unicast_frag_packet);
- unsigned long flags;
+ struct sk_buff *new_skb = NULL;
+ int ret;
if (check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
@@ -1217,44 +1216,16 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
/* packet for me */
if (is_my_mac(unicast_packet->dest)) {
- spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
- orig_node = ((struct orig_node *)
- hash_find(bat_priv->orig_hash, unicast_packet->orig));
+ ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
- if (!orig_node) {
- pr_debug("couldn't find orig node for fragmentation\n");
- spin_unlock_irqrestore(&bat_priv->orig_hash_lock,
- flags);
+ if (ret == NET_RX_DROP)
return NET_RX_DROP;
- }
- orig_node->last_frag_packet = jiffies;
-
- if (list_empty(&orig_node->frag_list) &&
- frag_create_buffer(&orig_node->frag_list)) {
- spin_unlock_irqrestore(&bat_priv->orig_hash_lock,
- flags);
- return NET_RX_DROP;
- }
-
- tmp_frag_entry =
- frag_search_packet(&orig_node->frag_list,
- unicast_packet);
-
- if (!tmp_frag_entry) {
- frag_create_entry(&orig_node->frag_list, skb);
- spin_unlock_irqrestore(&bat_priv->orig_hash_lock,
- flags);
+ /* packet was buffered for late merge */
+ if (!new_skb)
return NET_RX_SUCCESS;
- }
- skb = frag_merge_packet(&orig_node->frag_list,
- tmp_frag_entry, skb);
- spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
- if (!skb)
- return NET_RX_DROP;
-
- interface_rx(recv_if->soft_iface, skb, hdr_size);
+ interface_rx(recv_if->soft_iface, new_skb, hdr_size);
return NET_RX_SUCCESS;
}
diff --git a/drivers/staging/batman-adv/unicast.c b/drivers/staging/batman-adv/unicast.c
index fef8521..57fe2de 100644
--- a/drivers/staging/batman-adv/unicast.c
+++ b/drivers/staging/batman-adv/unicast.c
@@ -29,9 +29,9 @@
#include "hard-interface.h"
-struct sk_buff *frag_merge_packet(struct list_head *head,
- struct frag_packet_list_entry *tfp,
- struct sk_buff *skb)
+static struct sk_buff *frag_merge_packet(struct list_head *head,
+ struct frag_packet_list_entry *tfp,
+ struct sk_buff *skb)
{
struct unicast_frag_packet *up =
(struct unicast_frag_packet *)skb->data;
@@ -62,7 +62,7 @@ struct sk_buff *frag_merge_packet(struct list_head *head,
return skb;
}
-void frag_create_entry(struct list_head *head, struct sk_buff *skb)
+static void frag_create_entry(struct list_head *head, struct sk_buff *skb)
{
struct frag_packet_list_entry *tfp;
struct unicast_frag_packet *up =
@@ -78,7 +78,7 @@ void frag_create_entry(struct list_head *head, struct sk_buff *skb)
return;
}
-int frag_create_buffer(struct list_head *head)
+static int frag_create_buffer(struct list_head *head)
{
int i;
struct frag_packet_list_entry *tfp;
@@ -99,7 +99,7 @@ int frag_create_buffer(struct list_head *head)
return 0;
}
-struct frag_packet_list_entry *frag_search_packet(struct list_head *head,
+static struct frag_packet_list_entry *frag_search_packet(struct list_head *head,
struct unicast_frag_packet *up)
{
struct frag_packet_list_entry *tfp;
@@ -152,6 +152,60 @@ void frag_list_free(struct list_head *head)
return;
}
+/* frag_reassemble_skb():
+ * returns NET_RX_DROP if the operation failed - skb is left intact
+ * returns NET_RX_SUCCESS if the fragment was buffered (skb_new will be NULL)
+ * or the skb could be reassembled (skb_new will point to the new packet and
+ * skb was freed)
+ */
+int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+ struct sk_buff **new_skb)
+{
+ unsigned long flags;
+ struct orig_node *orig_node;
+ struct frag_packet_list_entry *tmp_frag_entry;
+ int ret = NET_RX_DROP;
+ struct unicast_frag_packet *unicast_packet =
+ (struct unicast_frag_packet *)skb->data;
+
+ *new_skb = NULL;
+ spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
+ orig_node = ((struct orig_node *)
+ hash_find(bat_priv->orig_hash, unicast_packet->orig));
+
+ if (!orig_node) {
+ pr_debug("couldn't find originator in orig_hash\n");
+ goto out;
+ }
+
+ orig_node->last_frag_packet = jiffies;
+
+ if (list_empty(&orig_node->frag_list) &&
+ frag_create_buffer(&orig_node->frag_list)) {
+ pr_debug("couldn't create frag buffer\n");
+ goto out;
+ }
+
+ tmp_frag_entry = frag_search_packet(&orig_node->frag_list,
+ unicast_packet);
+
+ if (!tmp_frag_entry) {
+ frag_create_entry(&orig_node->frag_list, skb);
+ ret = NET_RX_SUCCESS;
+ goto out;
+ }
+
+ *new_skb = frag_merge_packet(&orig_node->frag_list, tmp_frag_entry,
+ skb);
+ /* if not, merge failed */
+ if (*new_skb)
+ ret = NET_RX_SUCCESS;
+out:
+ spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
+
+ return ret;
+}
+
static int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
struct batman_if *batman_if, uint8_t dstaddr[])
{
diff --git a/drivers/staging/batman-adv/unicast.h b/drivers/staging/batman-adv/unicast.h
index b50d61b..5908b01 100644
--- a/drivers/staging/batman-adv/unicast.h
+++ b/drivers/staging/batman-adv/unicast.h
@@ -25,14 +25,8 @@
#define FRAG_TIMEOUT 10000 /* purge frag list entrys after time in ms */
#define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
-struct sk_buff *frag_merge_packet(struct list_head *head,
- struct frag_packet_list_entry *tfp,
- struct sk_buff *skb);
-
-void frag_create_entry(struct list_head *head, struct sk_buff *skb);
-int frag_create_buffer(struct list_head *head);
-struct frag_packet_list_entry *frag_search_packet(struct list_head *head,
- struct unicast_frag_packet *up);
+int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+ struct sk_buff **new_skb);
void frag_list_free(struct list_head *head);
int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
--
1.7.2.3
next prev parent reply other threads:[~2010-11-21 23:55 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-21 23:55 [B.A.T.M.A.N.] batman-adv for 2.6.38 (1) Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 01/29] Staging: batman-adv: Replace Andrew Lunn as Staging maintainer Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 02/29] Staging: batman-adv: ensure that eth_type_trans gets linear memory Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 03/29] Staging: batman-adv: Add new sysfs files to README Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 04/29] Staging: batman-adv: Don't remove interface with spinlock held Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 05/29] Staging: batman-adv: convert batman_if custom refcounting to kref functions Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 06/29] Staging: batman-adv: use rcu callbacks when freeing batman_if Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 07/29] Staging: batman-adv: restructure fragmentation to handle batman unicast packets Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 08/29] Staging: batman-adv: add frag_ prefix to all fragmentation related functions Sven Eckelmann
2010-11-21 23:55 ` Sven Eckelmann [this message]
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 10/29] Staging: batman-adv: remove redundant is_my_mac() check in route_unicast_packet Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 11/29] Staging: batman-adv: fragment forwarded packets Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 12/29] Staging: batman-adv: reassemble fragmented skb if mtu allows it Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 13/29] Staging: batman-adv: softif bridge loop avoidance Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 14/29] Staging: batman-adv: Unify sysfs file names with their bat_priv atomics Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 15/29] Staging: batman-adv: Wrapper functions for sysfs storing Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 16/29] Staging: batman-adv: Ommit storing struct device in sysfs functions Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 17/29] Staging: batman-adv: Make hop_penalty configurable via sysfs Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 18/29] Staging: batman-adv: Remove hashdata_compare_cb from hash Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 19/29] Staging: batman-adv: Remove hashdata_choose_cb " Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 20/29] Staging: batman-adv: Move hash callback related function to header Sven Eckelmann
2010-11-21 23:55 ` [B.A.T.M.A.N.] [PATCH 21/29] Staging: batman-adv: Make hash_iterate inlineable Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 22/29] Staging: batman-adv: Rewrite hash using hlist_* Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 23/29] Staging: batman-adv: Limit spin_locks to spin_lock_bh Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 24/29] Staging: batman-adv: adding gateway functionality Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 25/29] Staging: batman-adv: send DHCP requests directly to the chosen gw Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 26/29] Staging: batman-adv: best gw DHCP filter 802.1Q support Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 27/29] Staging: batman-adv: add gateway IPv6 support by filtering DHCPv6 messages Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 28/29] Staging: batman-adv: Use kernel version min macro Sven Eckelmann
2010-11-21 23:56 ` [B.A.T.M.A.N.] [PATCH 29/29] Staging: batman-adv: Use kernel functions to identify broadcasts Sven Eckelmann
2010-11-22 1:06 ` [B.A.T.M.A.N.] batman-adv for 2.6.38 (1) Marek Lindner
2010-11-22 10:28 ` Sven Eckelmann
2010-11-22 11:34 ` [B.A.T.M.A.N.] Staging: batman-adv for 2.6.37 (6) Sven Eckelmann
2010-11-29 18:55 ` Greg KH
2010-11-22 11:34 ` [B.A.T.M.A.N.] [PATCH-stable] Staging: batman-adv: ensure that eth_type_trans gets linear memory Sven Eckelmann
2010-11-22 11:34 ` [B.A.T.M.A.N.] [PATCH 1/2] " Sven Eckelmann
2010-11-22 11:34 ` [B.A.T.M.A.N.] [PATCH 2/2] Staging: batman-adv: Don't remove interface with spinlock held Sven Eckelmann
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