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Date: Fri, 20 Jul 2007 09:51:05 +0800
From: "rae l" <crquan@...il.com>
To: "David Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, kuznet@....inr.ac.ru,
"Patrick McHardy" <kaber@...sh.net>, pekkas@...core.fi,
jmorris@...ei.org, linux-kernel@...r.kernel.org,
"Denis Cheng" <crquan@...il.com>
Subject: Re: [PATCH 1/2] net/core: merge the content of dev_mcast.c into dev.c
On 7/18/07, Denis Cheng <crquan@...il.com> wrote:
> - removed three function declarations from header file to mark them static,
> - reduced one file
>
> Signed-off-by: Denis Cheng <crquan@...il.com>
> ---
>
> this one is just merging by concatenating, and I'll try to adjust some
> function definitions' order to make it more readable.
>
> include/linux/netdevice.h | 3 -
> net/core/Makefile | 2 +-
> net/core/dev.c | 239 +++++++++++++++++++++++++++++++++++++++++-
> net/core/dev_mcast.c | 255 ---------------------------------------------
> 4 files changed, 237 insertions(+), 262 deletions(-)
> delete mode 100644 net/core/dev_mcast.c
>
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 9820ca1..ca68c58 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1091,15 +1091,12 @@ extern int register_netdev(struct net_device *dev);
> extern void unregister_netdev(struct net_device *dev);
> /* Functions used for secondary unicast and multicast support */
> extern void dev_set_rx_mode(struct net_device *dev);
> -extern void __dev_set_rx_mode(struct net_device *dev);
> extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
> extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
> extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
> extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
> extern int dev_mc_sync(struct net_device *to, struct net_device *from);
> extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
> -extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
> -extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
> extern void dev_set_promiscuity(struct net_device *dev, int inc);
> extern void dev_set_allmulti(struct net_device *dev, int inc);
> extern void netdev_state_change(struct net_device *dev);
> diff --git a/net/core/Makefile b/net/core/Makefile
> index 4751613..54d28dd 100644
> --- a/net/core/Makefile
> +++ b/net/core/Makefile
> @@ -7,7 +7,7 @@ obj-y := sock.o request_sock.o skbuff.o iovec.o datagram.o stream.o scm.o \
>
> obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
>
> -obj-y += dev.o ethtool.o dev_mcast.o dst.o netevent.o \
> +obj-y += dev.o ethtool.o dst.o netevent.o \
> neighbour.o rtnetlink.o utils.o link_watch.o filter.o
>
> obj-$(CONFIG_XFRM) += flow.o
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 6357f54..16842af 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -18,6 +18,7 @@
> * Alexey Kuznetsov <kuznet@....inr.ac.ru>
> * Adam Sulmicki <adam@...r.umd.edu>
> * Pekka Riikonen <priikone@...sidon.pspt.fi>
> + * Denis Cheng <crquan@...il.com>
> *
> * Changes:
> * D.J. Barrow : Fixed bug where dev->refcnt gets set
> @@ -70,6 +71,32 @@
> * indefinitely on dev->refcnt
> * J Hadi Salim : - Backlog queue sampling
> * - netif_rx() feedback
> + * Denis Cheng : Merge dev_mcast.c into it
> + */
> +
> +/*
> + * The original information in dev_mcast.c:
> + *
> + * Linux NET3: Multicast List maintenance.
> + *
> + * Authors:
> + * Tim Kordas <tjk@...tromo.eeap.cwru.edu>
> + * Richard Underwood <richard@...z.demon.co.uk>
> + *
> + * Stir fried together from the IP multicast and CAP patches above
> + * Alan Cox <Alan.Cox@...ux.org>
> + *
> + * Fixes:
> + * Alan Cox : Update the device on a real delete
> + * rather than any time but...
> + * Alan Cox : IFF_ALLMULTI support.
> + * Alan Cox : New format set_multicast_list() calls.
> + * Gleb Natapov : Remove dev_mc_lock.
> + *
> + * This program is free software; you can redistribute it and/or
> + * 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.
> */
>
> #include <asm/uaccess.h>
> @@ -2622,7 +2649,7 @@ void dev_set_allmulti(struct net_device *dev, int inc)
> * filtering it is put in promiscous mode while unicast addresses
> * are present.
> */
> -void __dev_set_rx_mode(struct net_device *dev)
> +static void __dev_set_rx_mode(struct net_device *dev)
> {
> /* dev_open will call this function so the list will stay sane. */
> if (!(dev->flags&IFF_UP))
> @@ -2657,7 +2684,7 @@ void dev_set_rx_mode(struct net_device *dev)
> netif_tx_unlock_bh(dev);
> }
>
> -int __dev_addr_delete(struct dev_addr_list **list, int *count,
> +static int __dev_addr_delete(struct dev_addr_list **list, int *count,
> void *addr, int alen, int glbl)
> {
> struct dev_addr_list *da;
> @@ -2683,7 +2710,7 @@ int __dev_addr_delete(struct dev_addr_list **list, int *count,
> return -ENOENT;
> }
>
> -int __dev_addr_add(struct dev_addr_list **list, int *count,
> +static int __dev_addr_add(struct dev_addr_list **list, int *count,
> void *addr, int alen, int glbl)
> {
> struct dev_addr_list *da;
> @@ -4049,3 +4076,209 @@ EXPORT_SYMBOL(dev_load);
> #endif
>
> EXPORT_PER_CPU_SYMBOL(softnet_data);
> +
> +/*
> + * Device multicast list maintenance.
> + *
> + * This is used both by IP and by the user level maintenance functions.
> + * Unlike BSD we maintain a usage count on a given multicast address so
> + * that a casual user application can add/delete multicasts used by
> + * protocols without doing damage to the protocols when it deletes the
> + * entries. It also helps IP as it tracks overlapping maps.
> + *
> + * Device mc lists are changed by bh at least if IPv6 is enabled,
> + * so that it must be bh protected.
> + *
> + * We block accesses to device mc filters with netif_tx_lock.
> + */
> +
> +/*
> + * Delete a device level multicast
> + */
> +
> +int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl)
> +{
> + int err;
> +
> + netif_tx_lock_bh(dev);
> + err = __dev_addr_delete(&dev->mc_list, &dev->mc_count,
> + addr, alen, glbl);
> + if (!err) {
> + /*
> + * We have altered the list, so the card
> + * loaded filter is now wrong. Fix it
> + */
> +
> + __dev_set_rx_mode(dev);
> + }
> + netif_tx_unlock_bh(dev);
> + return err;
> +}
> +
> +/*
> + * Add a device level multicast
> + */
> +
> +int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl)
> +{
> + int err;
> +
> + netif_tx_lock_bh(dev);
> + err = __dev_addr_add(&dev->mc_list, &dev->mc_count, addr, alen, glbl);
> + if (!err)
> + __dev_set_rx_mode(dev);
> + netif_tx_unlock_bh(dev);
> + return err;
> +}
> +
> +/**
> + * dev_mc_sync - Synchronize device's multicast list to another device
> + * @to: destination device
> + * @from: source device
> + *
> + * Add newly added addresses to the destination device and release
> + * addresses that have no users left. The source device must be
> + * locked by netif_tx_lock_bh.
> + *
> + * This function is intended to be called from the dev->set_multicast_list
> + * function of layered software devices.
> + */
> +int dev_mc_sync(struct net_device *to, struct net_device *from)
> +{
> + struct dev_addr_list *da;
> + int err = 0;
> +
> + netif_tx_lock_bh(to);
> + for (da = from->mc_list; da != NULL; da = da->next) {
> + if (!da->da_synced) {
> + err = __dev_addr_add(&to->mc_list, &to->mc_count,
> + da->da_addr, da->da_addrlen, 0);
> + if (err < 0)
> + break;
> + da->da_synced = 1;
> + da->da_users++;
> + } else if (da->da_users == 1) {
> + __dev_addr_delete(&to->mc_list, &to->mc_count,
> + da->da_addr, da->da_addrlen, 0);
> + __dev_addr_delete(&from->mc_list, &from->mc_count,
> + da->da_addr, da->da_addrlen, 0);
> + }
> + }
> + if (!err)
> + __dev_set_rx_mode(to);
> + netif_tx_unlock_bh(to);
> +
> + return err;
> +}
> +EXPORT_SYMBOL(dev_mc_sync);
> +
> +
> +/**
> + * dev_mc_unsync - Remove synchronized addresses from the destination
> + * device
> + * @to: destination device
> + * @from: source device
> + *
> + * Remove all addresses that were added to the destination device by
> + * dev_mc_sync(). This function is intended to be called from the
> + * dev->stop function of layered software devices.
> + */
> +void dev_mc_unsync(struct net_device *to, struct net_device *from)
> +{
> + struct dev_addr_list *da;
> +
> + netif_tx_lock_bh(from);
> + netif_tx_lock_bh(to);
> +
> + for (da = from->mc_list; da != NULL; da = da->next) {
> + if (!da->da_synced)
> + continue;
> + __dev_addr_delete(&to->mc_list, &to->mc_count,
> + da->da_addr, da->da_addrlen, 0);
> + da->da_synced = 0;
> + __dev_addr_delete(&from->mc_list, &from->mc_count,
> + da->da_addr, da->da_addrlen, 0);
> + }
> + __dev_set_rx_mode(to);
> +
> + netif_tx_unlock_bh(to);
> + netif_tx_unlock_bh(from);
> +}
> +EXPORT_SYMBOL(dev_mc_unsync);
> +
> +#ifdef CONFIG_PROC_FS
> +static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
> +{
> + struct net_device *dev;
> + loff_t off = 0;
> +
> + read_lock(&dev_base_lock);
> + for_each_netdev(dev) {
> + if (off++ == *pos)
> + return dev;
> + }
> + return NULL;
> +}
> +
> +static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
> +{
> + ++*pos;
> + return next_net_device((struct net_device *)v);
> +}
> +
> +static void dev_mc_seq_stop(struct seq_file *seq, void *v)
> +{
> + read_unlock(&dev_base_lock);
> +}
> +
> +
> +static int dev_mc_seq_show(struct seq_file *seq, void *v)
> +{
> + struct dev_addr_list *m;
> + struct net_device *dev = v;
> +
> + netif_tx_lock_bh(dev);
> + for (m = dev->mc_list; m; m = m->next) {
> + int i;
> +
> + seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
> + dev->name, m->dmi_users, m->dmi_gusers);
> +
> + for (i = 0; i < m->dmi_addrlen; i++)
> + seq_printf(seq, "%02x", m->dmi_addr[i]);
> +
> + seq_putc(seq, '\n');
> + }
> + netif_tx_unlock_bh(dev);
> + return 0;
> +}
> +
> +static const struct seq_operations dev_mc_seq_ops = {
> + .start = dev_mc_seq_start,
> + .next = dev_mc_seq_next,
> + .stop = dev_mc_seq_stop,
> + .show = dev_mc_seq_show,
> +};
> +
> +static int dev_mc_seq_open(struct inode *inode, struct file *file)
> +{
> + return seq_open(file, &dev_mc_seq_ops);
> +}
> +
> +static const struct file_operations dev_mc_seq_fops = {
> + .owner = THIS_MODULE,
> + .open = dev_mc_seq_open,
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = seq_release,
> +};
> +
> +#endif
> +
> +void __init dev_mcast_init(void)
> +{
> + proc_net_fops_create("dev_mcast", 0, &dev_mc_seq_fops);
> +}
> +
> +EXPORT_SYMBOL(dev_mc_add);
> +EXPORT_SYMBOL(dev_mc_delete);
> diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
> deleted file mode 100644
> index 99aece1..0000000
> --- a/net/core/dev_mcast.c
> +++ /dev/null
> @@ -1,255 +0,0 @@
> -/*
> - * Linux NET3: Multicast List maintenance.
> - *
> - * Authors:
> - * Tim Kordas <tjk@...tromo.eeap.cwru.edu>
> - * Richard Underwood <richard@...z.demon.co.uk>
> - *
> - * Stir fried together from the IP multicast and CAP patches above
> - * Alan Cox <Alan.Cox@...ux.org>
> - *
> - * Fixes:
> - * Alan Cox : Update the device on a real delete
> - * rather than any time but...
> - * Alan Cox : IFF_ALLMULTI support.
> - * Alan Cox : New format set_multicast_list() calls.
> - * Gleb Natapov : Remove dev_mc_lock.
> - *
> - * This program is free software; you can redistribute it and/or
> - * 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.
> - */
> -
> -#include <linux/module.h>
> -#include <asm/uaccess.h>
> -#include <asm/system.h>
> -#include <linux/bitops.h>
> -#include <linux/types.h>
> -#include <linux/kernel.h>
> -#include <linux/string.h>
> -#include <linux/mm.h>
> -#include <linux/socket.h>
> -#include <linux/sockios.h>
> -#include <linux/in.h>
> -#include <linux/errno.h>
> -#include <linux/interrupt.h>
> -#include <linux/if_ether.h>
> -#include <linux/inet.h>
> -#include <linux/netdevice.h>
> -#include <linux/etherdevice.h>
> -#include <linux/proc_fs.h>
> -#include <linux/seq_file.h>
> -#include <linux/init.h>
> -#include <net/ip.h>
> -#include <net/route.h>
> -#include <linux/skbuff.h>
> -#include <net/sock.h>
> -#include <net/arp.h>
> -
> -
> -/*
> - * Device multicast list maintenance.
> - *
> - * This is used both by IP and by the user level maintenance functions.
> - * Unlike BSD we maintain a usage count on a given multicast address so
> - * that a casual user application can add/delete multicasts used by
> - * protocols without doing damage to the protocols when it deletes the
> - * entries. It also helps IP as it tracks overlapping maps.
> - *
> - * Device mc lists are changed by bh at least if IPv6 is enabled,
> - * so that it must be bh protected.
> - *
> - * We block accesses to device mc filters with netif_tx_lock.
> - */
> -
> -/*
> - * Delete a device level multicast
> - */
> -
> -int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl)
> -{
> - int err;
> -
> - netif_tx_lock_bh(dev);
> - err = __dev_addr_delete(&dev->mc_list, &dev->mc_count,
> - addr, alen, glbl);
> - if (!err) {
> - /*
> - * We have altered the list, so the card
> - * loaded filter is now wrong. Fix it
> - */
> -
> - __dev_set_rx_mode(dev);
> - }
> - netif_tx_unlock_bh(dev);
> - return err;
> -}
> -
> -/*
> - * Add a device level multicast
> - */
> -
> -int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl)
> -{
> - int err;
> -
> - netif_tx_lock_bh(dev);
> - err = __dev_addr_add(&dev->mc_list, &dev->mc_count, addr, alen, glbl);
> - if (!err)
> - __dev_set_rx_mode(dev);
> - netif_tx_unlock_bh(dev);
> - return err;
> -}
> -
> -/**
> - * dev_mc_sync - Synchronize device's multicast list to another device
> - * @to: destination device
> - * @from: source device
> - *
> - * Add newly added addresses to the destination device and release
> - * addresses that have no users left. The source device must be
> - * locked by netif_tx_lock_bh.
> - *
> - * This function is intended to be called from the dev->set_multicast_list
> - * function of layered software devices.
> - */
> -int dev_mc_sync(struct net_device *to, struct net_device *from)
> -{
> - struct dev_addr_list *da;
> - int err = 0;
> -
> - netif_tx_lock_bh(to);
> - for (da = from->mc_list; da != NULL; da = da->next) {
> - if (!da->da_synced) {
> - err = __dev_addr_add(&to->mc_list, &to->mc_count,
> - da->da_addr, da->da_addrlen, 0);
> - if (err < 0)
> - break;
> - da->da_synced = 1;
> - da->da_users++;
> - } else if (da->da_users == 1) {
> - __dev_addr_delete(&to->mc_list, &to->mc_count,
> - da->da_addr, da->da_addrlen, 0);
> - __dev_addr_delete(&from->mc_list, &from->mc_count,
> - da->da_addr, da->da_addrlen, 0);
> - }
> - }
> - if (!err)
> - __dev_set_rx_mode(to);
> - netif_tx_unlock_bh(to);
> -
> - return err;
> -}
> -EXPORT_SYMBOL(dev_mc_sync);
> -
> -
> -/**
> - * dev_mc_unsync - Remove synchronized addresses from the destination
> - * device
> - * @to: destination device
> - * @from: source device
> - *
> - * Remove all addresses that were added to the destination device by
> - * dev_mc_sync(). This function is intended to be called from the
> - * dev->stop function of layered software devices.
> - */
> -void dev_mc_unsync(struct net_device *to, struct net_device *from)
> -{
> - struct dev_addr_list *da;
> -
> - netif_tx_lock_bh(from);
> - netif_tx_lock_bh(to);
> -
> - for (da = from->mc_list; da != NULL; da = da->next) {
> - if (!da->da_synced)
> - continue;
> - __dev_addr_delete(&to->mc_list, &to->mc_count,
> - da->da_addr, da->da_addrlen, 0);
> - da->da_synced = 0;
> - __dev_addr_delete(&from->mc_list, &from->mc_count,
> - da->da_addr, da->da_addrlen, 0);
> - }
> - __dev_set_rx_mode(to);
> -
> - netif_tx_unlock_bh(to);
> - netif_tx_unlock_bh(from);
> -}
> -EXPORT_SYMBOL(dev_mc_unsync);
> -
> -#ifdef CONFIG_PROC_FS
> -static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
> -{
> - struct net_device *dev;
> - loff_t off = 0;
> -
> - read_lock(&dev_base_lock);
> - for_each_netdev(dev) {
> - if (off++ == *pos)
> - return dev;
> - }
> - return NULL;
> -}
> -
> -static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
> -{
> - ++*pos;
> - return next_net_device((struct net_device *)v);
> -}
> -
> -static void dev_mc_seq_stop(struct seq_file *seq, void *v)
> -{
> - read_unlock(&dev_base_lock);
> -}
> -
> -
> -static int dev_mc_seq_show(struct seq_file *seq, void *v)
> -{
> - struct dev_addr_list *m;
> - struct net_device *dev = v;
> -
> - netif_tx_lock_bh(dev);
> - for (m = dev->mc_list; m; m = m->next) {
> - int i;
> -
> - seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
> - dev->name, m->dmi_users, m->dmi_gusers);
> -
> - for (i = 0; i < m->dmi_addrlen; i++)
> - seq_printf(seq, "%02x", m->dmi_addr[i]);
> -
> - seq_putc(seq, '\n');
> - }
> - netif_tx_unlock_bh(dev);
> - return 0;
> -}
> -
> -static const struct seq_operations dev_mc_seq_ops = {
> - .start = dev_mc_seq_start,
> - .next = dev_mc_seq_next,
> - .stop = dev_mc_seq_stop,
> - .show = dev_mc_seq_show,
> -};
> -
> -static int dev_mc_seq_open(struct inode *inode, struct file *file)
> -{
> - return seq_open(file, &dev_mc_seq_ops);
> -}
> -
> -static const struct file_operations dev_mc_seq_fops = {
> - .owner = THIS_MODULE,
> - .open = dev_mc_seq_open,
> - .read = seq_read,
> - .llseek = seq_lseek,
> - .release = seq_release,
> -};
> -
> -#endif
> -
> -void __init dev_mcast_init(void)
> -{
> - proc_net_fops_create("dev_mcast", 0, &dev_mc_seq_fops);
> -}
> -
> -EXPORT_SYMBOL(dev_mc_add);
> -EXPORT_SYMBOL(dev_mc_delete);
> --
> 1.5.2.2
Is there any more comments on this?
>
>
--
Denis Cheng
Linux Application Developer
"One of my most productive days was throwing away 1000 lines of code."
- Ken Thompson.
-
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