* [patch 1/2] af_iucv: remove static declarations from header file.
2007-10-08 8:51 [patch 0/2] [AF_IUCV] fixes for net-2.6.24 - cleanup resend Ursula Braun
@ 2007-10-08 8:51 ` Ursula Braun
2007-10-08 8:51 ` [patch 2/2] af_iucv: postpone receival of iucv-packets Ursula Braun
2007-10-08 9:03 ` [patch 0/2] [AF_IUCV] fixes for net-2.6.24 - cleanup resend David Miller
2 siblings, 0 replies; 4+ messages in thread
From: Ursula Braun @ 2007-10-08 8:51 UTC (permalink / raw)
To: davem, netdev, linux-s390; +Cc: heicars2, Heiko Carstens
[-- Attachment #1: 711-afiucv-statics.diff --]
[-- Type: text/plain, Size: 2497 bytes --]
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
---
include/net/iucv/af_iucv.h | 20 --------------------
net/iucv/af_iucv.c | 3 +++
2 files changed, 3 insertions(+), 20 deletions(-)
Index: net-2.6.24-uschi/include/net/iucv/af_iucv.h
===================================================================
--- net-2.6.24-uschi.orig/include/net/iucv/af_iucv.h
+++ net-2.6.24-uschi/include/net/iucv/af_iucv.h
@@ -74,28 +74,8 @@ struct iucv_sock_list {
atomic_t autobind_name;
};
-static void iucv_sock_destruct(struct sock *sk);
-static void iucv_sock_cleanup_listen(struct sock *parent);
-static void iucv_sock_kill(struct sock *sk);
-static void iucv_sock_close(struct sock *sk);
-static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
- int addr_len);
-static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
- int alen, int flags);
-static int iucv_sock_listen(struct socket *sock, int backlog);
-static int iucv_sock_accept(struct socket *sock, struct socket *newsock,
- int flags);
-static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr,
- int *len, int peer);
-static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
- struct msghdr *msg, size_t len);
-static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
- struct msghdr *msg, size_t len, int flags);
unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
poll_table *wait);
-static int iucv_sock_release(struct socket *sock);
-static int iucv_sock_shutdown(struct socket *sock, int how);
-
void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
int iucv_sock_wait_state(struct sock *sk, int state, int state2,
Index: net-2.6.24-uschi/net/iucv/af_iucv.c
===================================================================
--- net-2.6.24-uschi.orig/net/iucv/af_iucv.c
+++ net-2.6.24-uschi/net/iucv/af_iucv.c
@@ -41,6 +41,9 @@ static struct proto iucv_proto = {
.obj_size = sizeof(struct iucv_sock),
};
+static void iucv_sock_kill(struct sock *sk);
+static void iucv_sock_close(struct sock *sk);
+
/* Call Back functions */
static void iucv_callback_rx(struct iucv_path *, struct iucv_message *);
static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *);
--
^ permalink raw reply [flat|nested] 4+ messages in thread* [patch 2/2] af_iucv: postpone receival of iucv-packets
2007-10-08 8:51 [patch 0/2] [AF_IUCV] fixes for net-2.6.24 - cleanup resend Ursula Braun
2007-10-08 8:51 ` [patch 1/2] af_iucv: remove static declarations from header file Ursula Braun
@ 2007-10-08 8:51 ` Ursula Braun
2007-10-08 9:03 ` [patch 0/2] [AF_IUCV] fixes for net-2.6.24 - cleanup resend David Miller
2 siblings, 0 replies; 4+ messages in thread
From: Ursula Braun @ 2007-10-08 8:51 UTC (permalink / raw)
To: davem, netdev, linux-s390; +Cc: heicars2
[-- Attachment #1: 712-afiucv-throttle.diff --]
[-- Type: text/plain, Size: 8613 bytes --]
From: Ursula Braun <braunu@de.ibm.com>
AF_IUCV socket programs may waste Linux storage, because af_iucv
allocates an skb whenever posted by the receive callback routine and
receives the message immediately.
Message receival is now postponed if data from previous callbacks has
not yet been transferred to the receiving socket program. Instead a
message handle is saved in a message queue as a reminder. Once
messages could be given to the receiving socket program, there is
an additional checking for entries in the message queue, followed
by skb allocation and message receival if applicable.
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
---
include/net/iucv/af_iucv.h | 7 +
net/iucv/af_iucv.c | 215 ++++++++++++++++++++++++++-------------------
2 files changed, 134 insertions(+), 88 deletions(-)
Index: net-2.6.24-uschi/include/net/iucv/af_iucv.h
===================================================================
--- net-2.6.24-uschi.orig/include/net/iucv/af_iucv.h
+++ net-2.6.24-uschi/include/net/iucv/af_iucv.h
@@ -50,6 +50,12 @@ struct sockaddr_iucv {
/* Common socket structures and functions */
+struct sock_msg_q {
+ struct iucv_path *path;
+ struct iucv_message msg;
+ struct list_head list;
+ spinlock_t lock;
+};
#define iucv_sk(__sk) ((struct iucv_sock *) __sk)
@@ -65,6 +71,7 @@ struct iucv_sock {
struct iucv_path *path;
struct sk_buff_head send_skb_q;
struct sk_buff_head backlog_skb_q;
+ struct sock_msg_q message_q;
unsigned int send_tag;
};
Index: net-2.6.24-uschi/net/iucv/af_iucv.c
===================================================================
--- net-2.6.24-uschi.orig/net/iucv/af_iucv.c
+++ net-2.6.24-uschi/net/iucv/af_iucv.c
@@ -224,6 +224,8 @@ static struct sock *iucv_sock_alloc(stru
INIT_LIST_HEAD(&iucv_sk(sk)->accept_q);
spin_lock_init(&iucv_sk(sk)->accept_q_lock);
skb_queue_head_init(&iucv_sk(sk)->send_skb_q);
+ INIT_LIST_HEAD(&iucv_sk(sk)->message_q.list);
+ spin_lock_init(&iucv_sk(sk)->message_q.lock);
skb_queue_head_init(&iucv_sk(sk)->backlog_skb_q);
iucv_sk(sk)->send_tag = 0;
@@ -673,6 +675,90 @@ out:
return err;
}
+static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len)
+{
+ int dataleft, size, copied = 0;
+ struct sk_buff *nskb;
+
+ dataleft = len;
+ while (dataleft) {
+ if (dataleft >= sk->sk_rcvbuf / 4)
+ size = sk->sk_rcvbuf / 4;
+ else
+ size = dataleft;
+
+ nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA);
+ if (!nskb)
+ return -ENOMEM;
+
+ memcpy(nskb->data, skb->data + copied, size);
+ copied += size;
+ dataleft -= size;
+
+ skb_reset_transport_header(nskb);
+ skb_reset_network_header(nskb);
+ nskb->len = size;
+
+ skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, nskb);
+ }
+
+ return 0;
+}
+
+static void iucv_process_message(struct sock *sk, struct sk_buff *skb,
+ struct iucv_path *path,
+ struct iucv_message *msg)
+{
+ int rc;
+
+ if (msg->flags & IPRMDATA) {
+ skb->data = NULL;
+ skb->len = 0;
+ } else {
+ rc = iucv_message_receive(path, msg, 0, skb->data,
+ msg->length, NULL);
+ if (rc) {
+ kfree_skb(skb);
+ return;
+ }
+ if (skb->truesize >= sk->sk_rcvbuf / 4) {
+ rc = iucv_fragment_skb(sk, skb, msg->length);
+ kfree_skb(skb);
+ skb = NULL;
+ if (rc) {
+ iucv_path_sever(path, NULL);
+ return;
+ }
+ skb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q);
+ } else {
+ skb_reset_transport_header(skb);
+ skb_reset_network_header(skb);
+ skb->len = msg->length;
+ }
+ }
+
+ if (sock_queue_rcv_skb(sk, skb))
+ skb_queue_head(&iucv_sk(sk)->backlog_skb_q, skb);
+}
+
+static void iucv_process_message_q(struct sock *sk)
+{
+ struct iucv_sock *iucv = iucv_sk(sk);
+ struct sk_buff *skb;
+ struct sock_msg_q *p, *n;
+
+ list_for_each_entry_safe(p, n, &iucv->message_q.list, list) {
+ skb = alloc_skb(p->msg.length, GFP_ATOMIC | GFP_DMA);
+ if (!skb)
+ break;
+ iucv_process_message(sk, skb, p->path, &p->msg);
+ list_del(&p->list);
+ kfree(p);
+ if (!skb_queue_empty(&iucv->backlog_skb_q))
+ break;
+ }
+}
+
static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
@@ -684,8 +770,9 @@ static int iucv_sock_recvmsg(struct kioc
int err = 0;
if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) &&
- skb_queue_empty(&iucv->backlog_skb_q) &&
- skb_queue_empty(&sk->sk_receive_queue))
+ skb_queue_empty(&iucv->backlog_skb_q) &&
+ skb_queue_empty(&sk->sk_receive_queue) &&
+ list_empty(&iucv->message_q.list))
return 0;
if (flags & (MSG_OOB))
@@ -724,16 +811,23 @@ static int iucv_sock_recvmsg(struct kioc
kfree_skb(skb);
/* Queue backlog skbs */
- rskb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q);
+ rskb = skb_dequeue(&iucv->backlog_skb_q);
while (rskb) {
if (sock_queue_rcv_skb(sk, rskb)) {
- skb_queue_head(&iucv_sk(sk)->backlog_skb_q,
+ skb_queue_head(&iucv->backlog_skb_q,
rskb);
break;
} else {
- rskb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q);
+ rskb = skb_dequeue(&iucv->backlog_skb_q);
}
}
+ if (skb_queue_empty(&iucv->backlog_skb_q)) {
+ spin_lock_bh(&iucv->message_q.lock);
+ if (!list_empty(&iucv->message_q.list))
+ iucv_process_message_q(sk);
+ spin_unlock_bh(&iucv->message_q.lock);
+ }
+
} else
skb_queue_head(&sk->sk_receive_queue, skb);
@@ -975,99 +1069,44 @@ static void iucv_callback_connack(struct
sk->sk_state_change(sk);
}
-static int iucv_fragment_skb(struct sock *sk, struct sk_buff *skb, int len,
- struct sk_buff_head *fragmented_skb_q)
-{
- int dataleft, size, copied = 0;
- struct sk_buff *nskb;
-
- dataleft = len;
- while (dataleft) {
- if (dataleft >= sk->sk_rcvbuf / 4)
- size = sk->sk_rcvbuf / 4;
- else
- size = dataleft;
-
- nskb = alloc_skb(size, GFP_ATOMIC | GFP_DMA);
- if (!nskb)
- return -ENOMEM;
-
- memcpy(nskb->data, skb->data + copied, size);
- copied += size;
- dataleft -= size;
-
- skb_reset_transport_header(nskb);
- skb_reset_network_header(nskb);
- nskb->len = size;
-
- skb_queue_tail(fragmented_skb_q, nskb);
- }
-
- return 0;
-}
-
static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg)
{
struct sock *sk = path->private;
struct iucv_sock *iucv = iucv_sk(sk);
- struct sk_buff *skb, *fskb;
- struct sk_buff_head fragmented_skb_q;
- int rc;
-
- skb_queue_head_init(&fragmented_skb_q);
+ struct sk_buff *skb;
+ struct sock_msg_q *save_msg;
+ int len;
if (sk->sk_shutdown & RCV_SHUTDOWN)
return;
- skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA);
- if (!skb) {
- iucv_path_sever(path, NULL);
- return;
- }
+ if (!list_empty(&iucv->message_q.list) ||
+ !skb_queue_empty(&iucv->backlog_skb_q))
+ goto save_message;
+
+ len = atomic_read(&sk->sk_rmem_alloc);
+ len += msg->length + sizeof(struct sk_buff);
+ if (len > sk->sk_rcvbuf)
+ goto save_message;
- if (msg->flags & IPRMDATA) {
- skb->data = NULL;
- skb->len = 0;
- } else {
- rc = iucv_message_receive(path, msg, 0, skb->data,
- msg->length, NULL);
- if (rc) {
- kfree_skb(skb);
- return;
- }
- if (skb->truesize >= sk->sk_rcvbuf / 4) {
- rc = iucv_fragment_skb(sk, skb, msg->length,
- &fragmented_skb_q);
- kfree_skb(skb);
- skb = NULL;
- if (rc) {
- iucv_path_sever(path, NULL);
- return;
- }
- } else {
- skb_reset_transport_header(skb);
- skb_reset_network_header(skb);
- skb->len = msg->length;
- }
- }
- /* Queue the fragmented skb */
- fskb = skb_dequeue(&fragmented_skb_q);
- while (fskb) {
- if (!skb_queue_empty(&iucv->backlog_skb_q))
- skb_queue_tail(&iucv->backlog_skb_q, fskb);
- else if (sock_queue_rcv_skb(sk, fskb))
- skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, fskb);
- fskb = skb_dequeue(&fragmented_skb_q);
- }
-
- /* Queue the original skb if it exists (was not fragmented) */
- if (skb) {
- if (!skb_queue_empty(&iucv->backlog_skb_q))
- skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb);
- else if (sock_queue_rcv_skb(sk, skb))
- skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb);
- }
+ skb = alloc_skb(msg->length, GFP_ATOMIC | GFP_DMA);
+ if (!skb)
+ goto save_message;
+ spin_lock(&iucv->message_q.lock);
+ iucv_process_message(sk, skb, path, msg);
+ spin_unlock(&iucv->message_q.lock);
+
+ return;
+
+save_message:
+ save_msg = kzalloc(sizeof(struct sock_msg_q), GFP_ATOMIC | GFP_DMA);
+ save_msg->path = path;
+ save_msg->msg = *msg;
+
+ spin_lock(&iucv->message_q.lock);
+ list_add_tail(&save_msg->list, &iucv->message_q.list);
+ spin_unlock(&iucv->message_q.lock);
}
static void iucv_callback_txdone(struct iucv_path *path,
--
^ permalink raw reply [flat|nested] 4+ messages in thread