Commit graph

27 commits

Author SHA1 Message Date
Pavel Emelyanov
a9fde26078 [VLAN]: Tag vlan_group_device with net device, not ifindex.
Currently vlan group is searched using one key - the ifindex.
We'll have to lookup the vlan_group by two keys - ifindex and
net. Turning the vlan_group lookup key to struct net_device
pointer will make this process easier.

Besides, this will eliminate one more place in the networking,
that assumes that indexes are unique in the kernel.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-16 00:48:04 -07:00
Pavel Emelyanov
67727184f2 [VLAN]: Reduce memory consumed by vlan_groups
Currently each vlan_groupd contains 8 pointers on arrays with 512
pointers on struct net_device each  :)  Such a construction "in many
cases ... wastes memory".

My proposal is to allow for some of these arrays pointers be NULL,
meaning that there are no devices in it. When a new device is added
to the vlan_group, the appropriate array is allocated.

The check in vlan_group_get_device's is safe, since the pointer
vg->vlan_devices_arrays[x] can only switch from NULL to not-NULL.
The vlan_group_prealloc_vid() is guarded with rtnl lock and is
also safe.

I've checked (I hope that) all the places, that use these arrays
and found, that the register_vlan_dev is the only place, that can
put a vlan device on an empty vlan_group.

Rough calculations shows, that after the patch a setup with a
single vlan dev (or up to 512 vlans with sequential vids) will
occupy approximately 8 times less memory.

The question I have is - does this patch makes sense, or a totally
new structures are required to store the vlan_devs?

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-03-26 16:27:22 -07:00
Patrick McHardy
181499356e [VLAN]: Constify skb argument to vlan_get_tag()
Required by next patch to use it from the flow classifier.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-05 16:20:22 -08:00
Patrick McHardy
57d3ae847d [VLAN]: Turn __constant_htons into htons where possible
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:32 -08:00
Patrick McHardy
9dfebcc647 [VLAN]: Turn VLAN_DEV_INFO into inline function
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:32 -08:00
Patrick McHardy
af30151709 [VLAN]: Simplify vlan unregistration
Keep track of the number of VLAN devices in a vlan group. This allows
to have the caller sense when the group is going to be destroyed and
stop using it, which in turn allows to remove the wrapper around
unregister_vlan_dev for the NETDEV_UNREGISTER notifier and avoid
iterating over all possible VLAN ids whenever a device in unregistered.

Also fix what looks like a use-after-free (but is actually safe since
we're holding the RTNL), the real_dev reference should not be dropped
while we still use it.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:31 -08:00
Patrick McHardy
7bd38d778e [VLAN]: Use dev->stats
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:25 -08:00
Patrick McHardy
b7a4a83629 [VLAN]: Kill useless VLAN_NAME define
The only user already includes __FUNCTION__ (vlan_proto_init) in the
output, which is enough to identify what the message is about.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:25 -08:00
Patrick McHardy
740c15d0dd [VLAN]: Clean up vlan_hdr/vlan_ethhdr structs
Fix 3 space indentation and some overly long lines by moving the
comments to a kdoc structure description.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:24 -08:00
Patrick McHardy
476bcea67f [VLAN]: Remove unnecessary structure declarations
- struct packet_type is not used
- struct vlan_group is declared later in the file before the first use
- struct net_device is not needed since netdevice.h is included
- struct vlan_collection does not exist
- struct vlan_dev_info is declared later in the file before the first use

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:23 -08:00
Eric Dumazet
f0b5a0dcf1 [VLAN]: Avoid expensive divides
We can avoid divides (as seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y on
x86) changing vlan_group_get_device()/vlan_group_set_device() id
parameter from signed to unsigned.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:01:06 -08:00
Eric W. Biederman
881d966b48 [NET]: Make the device list and device lookups per namespace.
This patch makes most of the generic device layer network
namespace safe.  This patch makes dev_base_head a
network namespace variable, and then it picks up
a few associated variables.  The functions:
dev_getbyhwaddr
dev_getfirsthwbytype
dev_get_by_flags
dev_get_by_name
__dev_get_by_name
dev_get_by_index
__dev_get_by_index
dev_ioctl
dev_ethtool
dev_load
wireless_process_ioctl

were modified to take a network namespace argument, and
deal with it.

vlan_ioctl_set and brioctl_set were modified so their
hooks will receive a network namespace argument.

So basically anthing in the core of the network stack that was
affected to by the change of dev_base was modified to handle
multiple network namespaces.  The rest of the network stack was
simply modified to explicitly use &init_net the initial network
namespace.  This can be fixed when those components of the network
stack are modified to handle multiple network namespaces.

For now the ifindex generator is left global.

Fundametally ifindex numbers are per namespace, or else
we will have corner case problems with migration when
we get that far.

At the same time there are assumptions in the network stack
that the ifindex of a network device won't change.  Making
the ifindex number global seems a good compromise until
the network stack can cope with ifindex changes when
you change namespaces, and the like.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:49:10 -07:00
Patrick McHardy
56addd6eee [VLAN]: Use multicast list synchronization helpers
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 18:53:28 -07:00
Patrick McHardy
6c78dcbd47 [VLAN]: Fix promiscous/allmulti synchronization races
The set_multicast_list function may be called without holding the rtnl
mutex, resulting in races when changing the underlying device's promiscous
and allmulti state. Use the change_rx_mode hook, which is always invoked
under the rtnl.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 18:52:56 -07:00
Patrick McHardy
8c979c26a0 [VLAN]: Fix MAC address handling
The VLAN MAC address handling is broken in multiple ways. When the address
differs when setting it, the real device is put in promiscous mode twice,
but never taken out again. Additionally it doesn't resync when the real
device's address is changed and needlessly puts it in promiscous mode when
the vlan device is still down.

Fix by moving address handling to vlan_dev_open/vlan_dev_stop and properly
deal with address changes in the device notifier. Also switch to
dev_unicast_add (which needs the exact same handling).

Since the set_mac_address handler is identical to the generic ethernet one
with these changes, kill it and use ether_setup().

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-11 19:45:24 -07:00
Patrick McHardy
a4bf3af4ac [VLAN]: Introduce symbolic constants for flag values
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-10 22:15:02 -07:00
Patrick McHardy
b020cb4885 [VLAN]: Keep track of number of QoS mappings
Keep track of the number of configured ingress/egress QoS mappings to
avoid iteration while calculating the netlink attribute size.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-10 22:15:01 -07:00
Patrick McHardy
734423cf38 [VLAN]: Use 32 bit value for skb->priority mapping
skb->priority has only 32 bits and even VLAN uses 32 bit values in its API.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-10 22:15:00 -07:00
Arnaldo Carvalho de Melo
b0e380b1d8 [SK_BUFF]: unions of just one member don't get anything done, kill them
Renaming skb->h to skb->transport_header, skb->nh to skb->network_header and
skb->mac to skb->mac_header, to match the names of the associated helpers
(skb[_[re]set]_{transport,network,mac}_header).

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25 22:26:20 -07:00
Arnaldo Carvalho de Melo
98e399f82a [SK_BUFF]: Introduce skb_mac_header()
For the places where we need a pointer to the mac header, it is still legal to
touch skb->mac.raw directly if just adding to, subtracting from or setting it
to another layer header.

This one also converts some more cases to skb_reset_mac_header() that my
regex missed as it had no spaces before nor after '=', ugh.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25 22:24:41 -07:00
Dan Aloni
5c15bdec5c [VLAN]: Avoid a 4-order allocation.
This patch splits the vlan_group struct into a multi-allocated struct. On
x86_64, the size of the original struct is a little more than 32KB, causing
a 4-order allocation, which is prune to problems caused by buddy-system
external fragmentation conditions.

I couldn't just use vmalloc() because vfree() cannot be called in the
softirq context of the RCU callback.

Signed-off-by: Dan Aloni <da-x@monatomic.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-02 20:44:51 -08:00
Alexey Dobriyan
d136fe7243 [PATCH] Finish annotations of struct vlan_ethhdr
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-10 16:15:34 -07:00
David S. Miller
7ea49ed73c [VLAN]: Make sure bonding packet drop checks get done in hwaccel RX path.
Since __vlan_hwaccel_rx() is essentially bypassing the
netif_receive_skb() call that would have occurred if we did the VLAN
decapsulation in software, we are missing the skb_bond() call and the
assosciated checks it does.

Export those checks via an inline function, skb_bond_should_drop(),
and use this in __vlan_hwaccel_rx().

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-08-17 16:29:46 -07:00
Stephen Hemminger
0610d11b53 [VLAN]: __vlan_hwaccel_rx can use the faster ether_compare_addr
The inline function compare_ether_addr is faster than memcmp.
Also, don't need to drag in proc_fs.h, the only reference to proc_dir_entry
is a pointer so the declaration is needed here.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Acked-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-14 16:34:22 -07:00
Alexey Dobriyan
3c3f8f25c1 [8021Q]: Add endian annotations.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-19 15:41:28 -07:00
David S. Miller
f2ccd8fa06 [NET]: Kill skb->real_dev
Bonding just wants the device before the skb_bond()
decapsulation occurs, so simply pass that original
device into packet_type->func() as an argument.

It remains to be seen whether we can use this same
exact thing to get rid of skb->input_dev as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29 15:32:25 -07:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00