diff options
Diffstat (limited to 'drivers/net/shaper.c')
| -rw-r--r-- | drivers/net/shaper.c | 104 |
1 files changed, 52 insertions, 52 deletions
diff --git a/drivers/net/shaper.c b/drivers/net/shaper.c index c7832e6..e886e8d 100644 --- a/drivers/net/shaper.c +++ b/drivers/net/shaper.c @@ -8,12 +8,12 @@ * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. - * - * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide - * warranty for any of this software. This material is provided - * "AS-IS" and at no charge. * - * + * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide + * warranty for any of this software. This material is provided + * "AS-IS" and at no charge. + * + * * Algorithm: * * Queue Frame: @@ -26,7 +26,7 @@ * * SHAPER_QLEN Maximum queued frames * SHAPER_LATENCY Bounding latency on a frame. Leaving this latency - * window drops the frame. This stops us queueing + * window drops the frame. This stops us queueing * frames for a long time and confusing a remote * host. * SHAPER_MAXSLIP Maximum time a priority frame may jump forward. @@ -42,8 +42,8 @@ * run off a 100-150Hz base clock typically. This gives us a resolution at * 200Kbit/second of about 2Kbit or 256 bytes. Above that our timer * resolution may start to cause much more burstiness in the traffic. We - * could avoid a lot of that by calling kick_shaper() at the end of the - * tied device transmissions. If you run above about 100K second you + * could avoid a lot of that by calling kick_shaper() at the end of the + * tied device transmissions. If you run above about 100K second you * may need to tune the supposed speed rate for the right values. * * BUGS: @@ -68,7 +68,7 @@ * Use skb->cb for private data. * 2000/03 Andi Kleen */ - + #include <linux/module.h> #include <linux/kernel.h> #include <linux/fcntl.h> @@ -87,13 +87,13 @@ #include <net/dst.h> #include <net/arp.h> -struct shaper_cb { +struct shaper_cb { unsigned long shapeclock; /* Time it should go out */ unsigned long shapestamp; /* Stamp for shaper */ __u32 shapelatency; /* Latency on frame */ __u32 shapelen; /* Frame length in clocks */ __u16 shapepend; /* Pending */ -}; +}; #define SHAPERCB(skb) ((struct shaper_cb *) ((skb)->cb)) static int sh_debug; /* Debug flag */ @@ -105,7 +105,7 @@ static void shaper_kick(struct shaper *sh); /* * Compute clocks on a buffer */ - + static int shaper_clocks(struct shaper *shaper, struct sk_buff *skb) { int t=skb->len/shaper->bytespertick; @@ -115,9 +115,9 @@ static int shaper_clocks(struct shaper *shaper, struct sk_buff *skb) /* * Set the speed of a shaper. We compute this in bytes per tick since * thats how the machine wants to run. Quoted input is in bits per second - * as is traditional (note not BAUD). We assume 8 bit bytes. + * as is traditional (note not BAUD). We assume 8 bit bytes. */ - + static void shaper_setspeed(struct shaper *shaper, int bitspersec) { shaper->bitspersec=bitspersec; @@ -129,40 +129,40 @@ static void shaper_setspeed(struct shaper *shaper, int bitspersec) /* * Throw a frame at a shaper. */ - + static int shaper_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct shaper *shaper = dev->priv; struct sk_buff *ptr; - + spin_lock(&shaper->lock); ptr=shaper->sendq.prev; - + /* * Set up our packet details */ - + SHAPERCB(skb)->shapelatency=0; SHAPERCB(skb)->shapeclock=shaper->recovery; if(time_before(SHAPERCB(skb)->shapeclock, jiffies)) SHAPERCB(skb)->shapeclock=jiffies; skb->priority=0; /* short term bug fix */ SHAPERCB(skb)->shapestamp=jiffies; - + /* * Time slots for this packet. */ - + SHAPERCB(skb)->shapelen= shaper_clocks(shaper,skb); - + { struct sk_buff *tmp; /* * Up our shape clock by the time pending on the queue * (Should keep this in the shaper as a variable..) */ - for(tmp=skb_peek(&shaper->sendq); tmp!=NULL && + for(tmp=skb_peek(&shaper->sendq); tmp!=NULL && tmp!=(struct sk_buff *)&shaper->sendq; tmp=tmp->next) SHAPERCB(skb)->shapeclock+=SHAPERCB(tmp)->shapelen; /* @@ -191,7 +191,7 @@ static int shaper_start_xmit(struct sk_buff *skb, struct net_device *dev) /* * Transmit from a shaper */ - + static void shaper_queue_xmit(struct shaper *shaper, struct sk_buff *skb) { struct sk_buff *newskb=skb_clone(skb, GFP_ATOMIC); @@ -218,7 +218,7 @@ static void shaper_queue_xmit(struct shaper *shaper, struct sk_buff *skb) /* * Timer handler for shaping clock */ - + static void shaper_timer(unsigned long data) { struct shaper *shaper = (struct shaper *)data; @@ -229,25 +229,25 @@ static void shaper_timer(unsigned long data) } /* - * Kick a shaper queue and try and do something sensible with the - * queue. + * Kick a shaper queue and try and do something sensible with the + * queue. */ static void shaper_kick(struct shaper *shaper) { struct sk_buff *skb; - + /* * Walk the list (may be empty) */ - + while((skb=skb_peek(&shaper->sendq))!=NULL) { /* * Each packet due to go out by now (within an error - * of SHAPER_BURST) gets kicked onto the link + * of SHAPER_BURST) gets kicked onto the link */ - + if(sh_debug) printk("Clock = %ld, jiffies = %ld\n", SHAPERCB(skb)->shapeclock, jiffies); if(time_before_eq(SHAPERCB(skb)->shapeclock, jiffies + SHAPER_BURST)) @@ -255,16 +255,16 @@ static void shaper_kick(struct shaper *shaper) /* * Pull the frame and get interrupts back on. */ - + skb_unlink(skb, &shaper->sendq); - if (shaper->recovery < + if (shaper->recovery < SHAPERCB(skb)->shapeclock + SHAPERCB(skb)->shapelen) shaper->recovery = SHAPERCB(skb)->shapeclock + SHAPERCB(skb)->shapelen; /* * Pass on to the physical target device via * our low level packet thrower. */ - + SHAPERCB(skb)->shapepend=0; shaper_queue_xmit(shaper, skb); /* Fire */ } @@ -275,27 +275,27 @@ static void shaper_kick(struct shaper *shaper) /* * Next kick. */ - + if(skb!=NULL) mod_timer(&shaper->timer, SHAPERCB(skb)->shapeclock); } /* - * Bring the interface up. We just disallow this until a + * Bring the interface up. We just disallow this until a * bind. */ static int shaper_open(struct net_device *dev) { struct shaper *shaper=dev->priv; - + /* * Can't open until attached. * Also can't open until speed is set, or we'll get * a division by zero. */ - + if(shaper->dev==NULL) return -ENODEV; if(shaper->bitspersec==0) @@ -306,7 +306,7 @@ static int shaper_open(struct net_device *dev) /* * Closing a shaper flushes the queues. */ - + static int shaper_close(struct net_device *dev) { struct shaper *shaper=dev->priv; @@ -335,7 +335,7 @@ static struct net_device_stats *shaper_get_stats(struct net_device *dev) return &sh->stats; } -static int shaper_header(struct sk_buff *skb, struct net_device *dev, +static int shaper_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) { struct shaper *sh=dev->priv; @@ -395,7 +395,7 @@ static int shaper_neigh_setup(struct neighbour *n) n->ops = &arp_broken_ops; n->output = n->ops->output; } -#endif +#endif return 0; } @@ -407,7 +407,7 @@ static int shaper_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p) p->ucast_probes = 0; p->mcast_probes = 0; } -#endif +#endif return 0; } @@ -432,7 +432,7 @@ static int shaper_attach(struct net_device *shdev, struct shaper *sh, struct net } else shdev->hard_header = NULL; - + if(dev->rebuild_header) { sh->rebuild_header = dev->rebuild_header; @@ -440,7 +440,7 @@ static int shaper_attach(struct net_device *shdev, struct shaper *sh, struct net } else shdev->rebuild_header = NULL; - + #if 0 if(dev->hard_header_cache) { @@ -451,7 +451,7 @@ static int shaper_attach(struct net_device *shdev, struct shaper *sh, struct net { shdev->hard_header_cache= NULL; } - + if(dev->header_cache_update) { sh->header_cache_update = dev->header_cache_update; @@ -464,7 +464,7 @@ static int shaper_attach(struct net_device *shdev, struct shaper *sh, struct net shdev->hard_header_cache = NULL; #endif shdev->neigh_setup = shaper_neigh_setup_dev; - + shdev->hard_header_len=dev->hard_header_len; shdev->type=dev->type; shdev->addr_len=dev->addr_len; @@ -477,13 +477,13 @@ static int shaper_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { struct shaperconf *ss= (struct shaperconf *)&ifr->ifr_ifru; struct shaper *sh=dev->priv; - + if(ss->ss_cmd == SHAPER_SET_DEV || ss->ss_cmd == SHAPER_SET_SPEED) { if(!capable(CAP_NET_ADMIN)) return -EPERM; } - + switch(ss->ss_cmd) { case SHAPER_SET_DEV: @@ -525,7 +525,7 @@ static void shaper_init_priv(struct net_device *dev) /* * Add a shaper device to the system */ - + static void __init shaper_setup(struct net_device *dev) { /* @@ -541,11 +541,11 @@ static void __init shaper_setup(struct net_device *dev) dev->hard_start_xmit = shaper_start_xmit; dev->get_stats = shaper_get_stats; dev->set_multicast_list = NULL; - + /* * Intialise the packet queues */ - + /* * Handlers for when we attach to a device. */ @@ -566,7 +566,7 @@ static void __init shaper_setup(struct net_device *dev) dev->tx_queue_len = 10; dev->flags = 0; } - + static int shapers = 1; #ifdef MODULE @@ -610,7 +610,7 @@ static int __init shaper_init(void) snprintf(name, IFNAMSIZ, "shaper%d", i); dev = alloc_netdev(sizeof(struct shaper), name, shaper_setup); - if (!dev) + if (!dev) break; if (register_netdev(dev)) { |