diff options
Diffstat (limited to 'net/atm')
| -rw-r--r-- | net/atm/Makefile | 3 | ||||
| -rw-r--r-- | net/atm/br2684.c | 28 | ||||
| -rw-r--r-- | net/atm/clip.c | 29 | ||||
| -rw-r--r-- | net/atm/ipcommon.c | 63 | ||||
| -rw-r--r-- | net/atm/ipcommon.h | 22 |
5 files changed, 47 insertions, 98 deletions
diff --git a/net/atm/Makefile b/net/atm/Makefile index 89656d6..cc50bd1 100644 --- a/net/atm/Makefile +++ b/net/atm/Makefile @@ -7,10 +7,7 @@ mpoa-objs := mpc.o mpoa_caches.o mpoa_proc.o obj-$(CONFIG_ATM) += atm.o obj-$(CONFIG_ATM_CLIP) += clip.o -atm-$(subst m,y,$(CONFIG_ATM_CLIP)) += ipcommon.o obj-$(CONFIG_ATM_BR2684) += br2684.o -atm-$(subst m,y,$(CONFIG_ATM_BR2684)) += ipcommon.o -atm-$(subst m,y,$(CONFIG_NET_SCH_ATM)) += ipcommon.o atm-$(CONFIG_PROC_FS) += proc.o obj-$(CONFIG_ATM_LANE) += lec.o diff --git a/net/atm/br2684.c b/net/atm/br2684.c index b04162f..83a1c1b 100644 --- a/net/atm/br2684.c +++ b/net/atm/br2684.c @@ -23,7 +23,6 @@ Author: Marcell GAL, 2000, XDSL Ltd, Hungary #include <linux/atmbr2684.h> #include "common.h" -#include "ipcommon.h" /* * Define this to use a version of the code which interacts with the higher @@ -500,11 +499,12 @@ Note: we do not have explicit unassign, but look at _push() */ int err; struct br2684_vcc *brvcc; - struct sk_buff_head copy; struct sk_buff *skb; + struct sk_buff_head *rq; struct br2684_dev *brdev; struct net_device *net_dev; struct atm_backend_br2684 be; + unsigned long flags; if (copy_from_user(&be, arg, sizeof be)) return -EFAULT; @@ -554,12 +554,30 @@ Note: we do not have explicit unassign, but look at _push() brvcc->old_push = atmvcc->push; barrier(); atmvcc->push = br2684_push; - skb_queue_head_init(©); - skb_migrate(&sk_atm(atmvcc)->sk_receive_queue, ©); - while ((skb = skb_dequeue(©)) != NULL) { + + rq = &sk_atm(atmvcc)->sk_receive_queue; + + spin_lock_irqsave(&rq->lock, flags); + if (skb_queue_empty(rq)) { + skb = NULL; + } else { + /* NULL terminate the list. */ + rq->prev->next = NULL; + skb = rq->next; + } + rq->prev = rq->next = (struct sk_buff *)rq; + rq->qlen = 0; + spin_unlock_irqrestore(&rq->lock, flags); + + while (skb) { + struct sk_buff *next = skb->next; + + skb->next = skb->prev = NULL; BRPRIV(skb->dev)->stats.rx_bytes -= skb->len; BRPRIV(skb->dev)->stats.rx_packets--; br2684_push(atmvcc, skb); + + skb = next; } __module_get(THIS_MODULE); return 0; diff --git a/net/atm/clip.c b/net/atm/clip.c index 1c41693..5f8a1d2 100644 --- a/net/atm/clip.c +++ b/net/atm/clip.c @@ -38,7 +38,6 @@ #include "common.h" #include "resources.h" -#include "ipcommon.h" #include <net/atmclip.h> @@ -469,8 +468,9 @@ static struct net_device_stats *clip_get_stats(struct net_device *dev) static int clip_mkip(struct atm_vcc *vcc, int timeout) { struct clip_vcc *clip_vcc; - struct sk_buff_head copy; struct sk_buff *skb; + struct sk_buff_head *rq; + unsigned long flags; if (!vcc->push) return -EBADFD; @@ -490,10 +490,26 @@ static int clip_mkip(struct atm_vcc *vcc, int timeout) clip_vcc->old_pop = vcc->pop; vcc->push = clip_push; vcc->pop = clip_pop; - skb_queue_head_init(©); - skb_migrate(&sk_atm(vcc)->sk_receive_queue, ©); + + rq = &sk_atm(vcc)->sk_receive_queue; + + spin_lock_irqsave(&rq->lock, flags); + if (skb_queue_empty(rq)) { + skb = NULL; + } else { + /* NULL terminate the list. */ + rq->prev->next = NULL; + skb = rq->next; + } + rq->prev = rq->next = (struct sk_buff *)rq; + rq->qlen = 0; + spin_unlock_irqrestore(&rq->lock, flags); + /* re-process everything received between connection setup and MKIP */ - while ((skb = skb_dequeue(©)) != NULL) + while (skb) { + struct sk_buff *next = skb->next; + + skb->next = skb->prev = NULL; if (!clip_devs) { atm_return(vcc, skb->truesize); kfree_skb(skb); @@ -506,6 +522,9 @@ static int clip_mkip(struct atm_vcc *vcc, int timeout) PRIV(skb->dev)->stats.rx_bytes -= len; kfree_skb(skb); } + + skb = next; + } return 0; } diff --git a/net/atm/ipcommon.c b/net/atm/ipcommon.c deleted file mode 100644 index 1d3de42..0000000 --- a/net/atm/ipcommon.c +++ /dev/null @@ -1,63 +0,0 @@ -/* net/atm/ipcommon.c - Common items for all ways of doing IP over ATM */ - -/* Written 1996-2000 by Werner Almesberger, EPFL LRC/ICA */ - - -#include <linux/module.h> -#include <linux/string.h> -#include <linux/skbuff.h> -#include <linux/netdevice.h> -#include <linux/in.h> -#include <linux/atmdev.h> -#include <linux/atmclip.h> - -#include "common.h" -#include "ipcommon.h" - - -#if 0 -#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) -#else -#define DPRINTK(format,args...) -#endif - - -/* - * skb_migrate appends the list at "from" to "to", emptying "from" in the - * process. skb_migrate is atomic with respect to all other skb operations on - * "from" and "to". Note that it locks both lists at the same time, so to deal - * with the lock ordering, the locks are taken in address order. - * - * This function should live in skbuff.c or skbuff.h. - */ - - -void skb_migrate(struct sk_buff_head *from, struct sk_buff_head *to) -{ - unsigned long flags; - struct sk_buff *skb_from = (struct sk_buff *) from; - struct sk_buff *skb_to = (struct sk_buff *) to; - struct sk_buff *prev; - - if ((unsigned long) from < (unsigned long) to) { - spin_lock_irqsave(&from->lock, flags); - spin_lock_nested(&to->lock, SINGLE_DEPTH_NESTING); - } else { - spin_lock_irqsave(&to->lock, flags); - spin_lock_nested(&from->lock, SINGLE_DEPTH_NESTING); - } - prev = from->prev; - from->next->prev = to->prev; - prev->next = skb_to; - to->prev->next = from->next; - to->prev = from->prev; - to->qlen += from->qlen; - spin_unlock(&to->lock); - from->prev = skb_from; - from->next = skb_from; - from->qlen = 0; - spin_unlock_irqrestore(&from->lock, flags); -} - - -EXPORT_SYMBOL(skb_migrate); diff --git a/net/atm/ipcommon.h b/net/atm/ipcommon.h deleted file mode 100644 index d72165f..0000000 --- a/net/atm/ipcommon.h +++ /dev/null @@ -1,22 +0,0 @@ -/* net/atm/ipcommon.h - Common items for all ways of doing IP over ATM */ - -/* Written 1996-2000 by Werner Almesberger, EPFL LRC/ICA */ - - -#ifndef NET_ATM_IPCOMMON_H -#define NET_ATM_IPCOMMON_H - - -#include <linux/string.h> -#include <linux/skbuff.h> -#include <linux/netdevice.h> -#include <linux/atmdev.h> - -/* - * Appends all skbs from "from" to "to". The operation is atomic with respect - * to all other skb operations on "from" or "to". - */ - -void skb_migrate(struct sk_buff_head *from,struct sk_buff_head *to); - -#endif |