From: Rusty Russell <rusty@rustcorp.com.au>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>,
virtualization <virtualization@lists.osdl.org>,
jgarzik <jgarzik@pobox.com>
Subject: Re: [PATCH 5/8] lguest: trivial guest network driver
Date: Wed, 14 Feb 2007 15:47:55 +1100 [thread overview]
Message-ID: <1171428475.19842.102.camel@localhost.localdomain> (raw)
In-Reply-To: <20070213140600.GA24711@gondor.apana.org.au>
On Wed, 2007-02-14 at 01:06 +1100, Herbert Xu wrote:
> On Tue, Feb 13, 2007 at 01:15:18PM +1100, Rusty Russell wrote:
> >
> > Good spotting! This function needs to be passed skb_headlen(skb),
> > rather than skb->len. Patch is below (I renamed the parameter as well,
> > for clarity).
>
> How about just dropping that parameter and using skb_headlen(skb)
> directly?
It's also used to generate dma structs for outgoing packets. In that
case, skb_headlen() == 0:
static struct sk_buff *lguestnet_alloc_skb(struct net_device *dev, int gfpflags)
{
struct sk_buff *skb;
skb = alloc_skb(16 + ETH_HLEN + DATA_SIZE, gfpflags);
if (!skb)
return NULL;
skb->dev = dev;
skb_reserve(skb, 16);
return skb;
}
/* Find a new skb to put in this slot in shared mem. */
static int fill_slot(struct net_device *dev, unsigned int slot)
{
struct lguestnet_info *info = dev->priv;
/* Try to create and register a new one. */
info->skb[slot] = lguestnet_alloc_skb(dev, GFP_ATOMIC);
if (!info->skb[slot]) {
printk("%s: could not fill slot %i\n", dev->name, slot);
return -ENOMEM;
}
skb_to_dma(info->skb[slot], ETH_HLEN + DATA_SIZE, &info->dma[slot]);
Cheers,
Rusty.
next prev parent reply other threads:[~2007-02-14 4:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-12 3:32 [PATCH 1/7] cleanup: paravirt unhandled fallthrough Rusty Russell
2007-02-12 3:33 ` [PATCH 2/7] cleanup: Initialize esp0 properly all the time Rusty Russell
2007-02-12 3:34 ` [PATCH 3/7] cleanup: Make hvc_console.c compile on non-PowerPC Rusty Russell
2007-02-12 3:35 ` [PATCH 4/7] cleanup: Move mce_disabled to asm/mce.h Rusty Russell
2007-02-12 3:36 ` [PATCH 5/7] cleanup: Rename cpu_gdt_descr and remove extern declaration from smpboot.c Rusty Russell
2007-02-12 3:37 ` [PATCH 6/7] cleanup: Remove extern declaration from mm/discontig.c, put in header Rusty Russell
2007-02-12 3:39 ` [PATCH 7/7] cleanup: make disable_acpi() valid w/o CONFIG_ACPI Rusty Russell
2007-02-12 3:41 ` [PATCH 1/2] lguest preparation: EXPORT_SYMBOL_GPL 5 functions Rusty Russell
2007-02-12 3:42 ` [PATCH 2/2] lguest preparation: expose futex infrastructure: get_futex_key, get_key_refs and drop_key_refs Rusty Russell
2007-02-12 3:44 ` [PATCH 1/8] lguest: Kconfig and headers Rusty Russell
2007-02-12 3:46 ` [PATCH 2/8] lguest: the host code (lg.ko) Rusty Russell
2007-02-12 3:48 ` [PATCH 3/8] lguest: Guest code Rusty Russell
2007-02-12 3:50 ` [PATCH 4/8] lguest: Makefile Rusty Russell
2007-02-12 3:52 ` [PATCH 5/8] lguest: trivial guest network driver Rusty Russell
2007-02-12 3:53 ` [PATCH 6/8] lguest: trivial guest console driver Rusty Russell
2007-02-12 3:54 ` [PATCH 7/8] lguest: trivial guest block driver Rusty Russell
2007-02-12 3:55 ` [PATCH 8/8] lguest: documentatation and example launcher Rusty Russell
2007-02-12 4:43 ` [PATCH 7/8] lguest: trivial guest block driver Jens Axboe
2007-02-12 5:27 ` Rusty Russell
2007-02-12 5:32 ` Jens Axboe
2007-02-12 5:33 ` Jens Axboe
2007-02-12 7:09 ` Rusty Russell
2007-02-12 7:09 ` Rusty Russell
2007-02-12 15:01 ` Jens Axboe
2007-02-13 0:25 ` Rusty Russell
2007-02-13 0:25 ` Rusty Russell
2007-02-13 0:44 ` Jens Axboe
2007-02-12 15:55 ` [PATCH 5/8] lguest: trivial guest network driver Herbert Xu
2007-02-13 2:15 ` Rusty Russell
2007-02-13 14:06 ` Herbert Xu
2007-02-14 4:47 ` Rusty Russell [this message]
2007-02-14 13:57 ` Herbert Xu
2007-02-14 23:00 ` Rusty Russell
2007-02-12 16:02 ` [PATCH 1/8] lguest: Kconfig and headers James Morris
2007-02-13 5:09 ` [PATCH 7/7] cleanup: make disable_acpi() valid w/o CONFIG_ACPI Len Brown
2007-02-12 9:16 ` [PATCH 5/7] cleanup: Rename cpu_gdt_descr and remove extern declaration from smpboot.c Zachary Amsden
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