iwlwifi: Use HW acceleration decryption by default
This patch reverses the hw_crypto logic and makes HW crypto a default.
Giving swcrypto=1 as parameter to the module disables HW crypto.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Mohamed Abbas [Tue, 15 Apr 2008 23:01:46 +0000 (16:01 -0700)]
iwlwifi: fix unload warning and error
This patch fix the error we get when unload the driver, No space for Tx.
The cause of this problem is related to receiving late SW rfkill from
rfkill subsystem during the driver teardown causing this error.
Signed-off-by: Mohamed Abbas <mabbas@linux.intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Ron Rindjunsky [Tue, 15 Apr 2008 23:01:45 +0000 (16:01 -0700)]
iwlwifi: arrange max number of Tx queues
This patch increases the max possible number of Tx queues, but leaves
current used number of queues as HW dependent
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
iwlwifi: Fix TKIP update key and get_free_ucode_key
This patch fixes a bug in update_tkip_key: only one key needs to be
allocated in uCode, every time it is updated, the old one will be
overwritten
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 23:01:43 +0000 (16:01 -0700)]
iwlwifi: move rxon associated command to hcmd
This patch run rxon associated command from hcmd handler
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 23:01:42 +0000 (16:01 -0700)]
iwlwifi: introduce host commands callbacks
This patch adds place holder for host command handlers
for supporting different implementations per HW
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Ron Rindjunsky [Tue, 15 Apr 2008 23:01:41 +0000 (16:01 -0700)]
iwlwifi: move HW device registration
This patch moves the HW device registration from the iwl-4965.c file, which
implies a HW specific support, to a more general location.
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 23:01:40 +0000 (16:01 -0700)]
iwlwifi: move the creation of LQ host command to iwlcore
This patch moves creation of LQ host command to iwlcore
from previous location in rate scaling.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 23:01:39 +0000 (16:01 -0700)]
iwlwifi: support different num of tx and rx antennas
This patch adds infrastructure for supporting different
number of tx and rx antennas
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 23:01:38 +0000 (16:01 -0700)]
iwlwifi: hw_setting cleanup
1. This patch renames hw_setting to hw_params
2. Align names of the structure and variables
3. set_hw_params is called from libs_ops
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1) It removes the statistics work. The request statistics command is
sent in ASYNC mode in this flow, the mutex is uneeded, so the request
statistics function can't go to sleep. No need for a workqueue anymore.
2) iwl4965_send_statistics_request has been renamed to
iwl_send_statistics_request and moved to iwl-core.c
3) A request for statistics is sent in alive_notify, the makes the uCode
sends statistics notification periodically starting from association.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Tue, 15 Apr 2008 19:13:36 +0000 (21:13 +0200)]
b43: Add fastpath to b43_mac_suspend()
This adds a fastpath for the common workloads to the
MAC suspend flushing.
In common workloads the FIFO flush will take between 100 and
200 microseconds. So we want to avoid calling msleep() in the
common case, as it will waste over 800 microseconds + scheduler
overhead.
This fastpath will hit in workloads where only small chunks
of data are transmitted (downloading a file) or when a TX rate bigger
or equal to 24MBit/s is used when transmitting lots of stuff (iperf).
So in the commonly used workloads it will basically always hit.
In case the fastpath is not hit, there's no real performance or latency
disadvantage from that.
And yes, I measured this. So this is not one of these
bad Programmer Likeliness Assumptions that are always wrong. ;)
Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 04:16:14 +0000 (21:16 -0700)]
iwlwifi: move shared pointers to iwl_priv
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
iwlwifi: perform bss_info_changed post association work right away
Do not use workqueue for bss_info_changed post association work.
When driver is notified of association the upper layer will be notified
right after that the association is complete. Doing the post association
work in a workqueue introduces a race condition where the upper layer may
want to make use of the association, but it is not yet complete.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Also change CONFIG_IWLCORE_RFKILL to CONFIG_IWLWIFI_RFKILL to
be more consistent with other config variables.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
iwl4965: make iwl4965_send_rxon_assoc asynchronous
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 04:16:10 +0000 (21:16 -0700)]
iwlwifi: Fix byte count table for fragmented packets
This patch fix byte count table update. Table must be updated for each
fragment
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This patch moves security related functions to iwl-sta.c.
Note that iwl4965_mac_update_tkip_key is still in iwl4965-base.c since it
is a mac80211 handler.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This patch fix book keeping of key table in the driver
to be synchronized with uCode
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This patch adds support for HW encryption/decryption in 1X WEP.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This patch adds HW encryption support in default WEP mode.
When no key mapping key/pairwise key is used. The key is broadcast key
is used as default/global/static key.
This code assumes that group cast key is added after pairwise key.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This patch adds declaration for static WEP host command. This command will
be used for default WEP group keys when no key mapping keys are used.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Tue, 15 Apr 2008 04:16:03 +0000 (21:16 -0700)]
iwlwifi: generalize iwlwifi init flow
This patch creates handlers to support
iwlwifi init flow for multiple HWs
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Johannes Berg [Sun, 13 Apr 2008 08:43:50 +0000 (10:43 +0200)]
mac80211: fix key todo list order
When we add multiple todo entries, we rely on them being executed
mostly in the right order, especially when a key is being replaced.
But when a default key is replaced, the todo list order will differ
from the order when the key being replaced is not a default key, so
problems will happen. Hence, just move each todo item to the end of
the list when it is added so we can in the other code ensure that
hw accel for a key will be disabled before it is enabled for the
replacement.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Johannes Berg [Fri, 11 Apr 2008 19:40:35 +0000 (21:40 +0200)]
mac80211: fix spinlock recursion
When STAs are expired, we need to hold the sta_lock. Using
the same lock for keys too would then mean we'd need another
key free function, and that'll just lead to confusion, so just
use a new spinlock for all key lists.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
proc: switch /proc/driver/ray_cs/ray_cs to seq_file interface
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Jean Tourrilhes <jt@hpl.hp.com> Cc: David S. Miller <davem@davemloft.net> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
mac80211: no BSS changes to driver from beacons processed during scanning
There is no need to send BSS changes to driver from beacons processed
during scanning. We are more interested in beacons from an AP with which
we are associated - these will still be used to send updates to driver as
the beacons are received without scanning.
This change·removes the requirement that bss_info_changed needs to be atomic.
The beacons received during scanning are processed from a tasklet, but if we
do not call bss_info_changed for these beacons there is no need for it to be
atomic. This function (bss_info_changed) is called either from workqueue or
ioctl in all other instances.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Some command structs contain reserved or unused fields, which the driver
send uninitialized down to the card.
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
libertas: convert libertas driver to use an event/cmdresp queue
This patch (co-developed by Dan Williams and Holger Schurig) uses a kfifo
object for events and a swapping buffer scheme for the command response to
preserve the zero-copy semantics of the CF driver and keep memory usage low.
The main thread should only ever touch the buffer indexed by priv->resp_idx,
while the interface code is free to write to the second buffer, then swap
priv->resp_idx under the driver spinlock. The firmware specs only permit
one in-flight command, so there will only ever be one command response to
process at a time.
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de> Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Ivo van Doorn [Wed, 9 Apr 2008 18:46:27 +0000 (20:46 +0200)]
rt2x00: Only free skb when beacon_update fails
In rt2x00lib_intf_scheduled_iter() we use the hw->beacon_update()
callback function. This means that it should behave similarly as mac80211
when that uses the function.
This means that the skb should only be freed when beacon_update() has failed,
otherwise the driver is the owner and is responsible for freeing the buffer.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Johannes Berg [Wed, 9 Apr 2008 14:45:37 +0000 (16:45 +0200)]
mac80211: fix key hwaccel race
The previous key locking patch left a small race: it would be possible
to add a key and take the interface down before the key todo is run so
that hwaccel for that key is enabled on an interface that is down. Avoid
this by running the todo list when an interface is brought up or down.
This patch also fixes a small bug: before this change, a few functions
used the key list without the lock that protects it.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
John Heffner [Tue, 15 Apr 2008 22:26:39 +0000 (15:26 -0700)]
[TCP]: Increase the max_burst threshold from 3 to tp->reordering.
This change is necessary to allow cwnd to grow during persistent
reordering. Cwnd moderation is applied when in the disorder state
and an ack that fills the hole comes in. If the hole was greater
than 3 packets, but less than tp->reordering, cwnd will shrink when
it should not have.
Signed-off-by: John Heffner <jheffner@napa.(none)> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 09:17:42 +0000 (02:17 -0700)]
[NET]: Do not allocate unneeded memory for dev->priv alignment.
The alloc_netdev_mq() tries to produce 32-bytes alignment for both
the net_device itself and its private data. The second alignment is
achieved by adding the NETDEV_ALIGN_CONST to the whole size of
the memory to be allocated.
However, for those devices that do not need the private area, this
addition just makes the net_device weight 1024 + 32 = 1068 bytes,
i.e. consume twice as much memory.
Since loopback device is such (sizeof_priv == 0 for it), and each
net namespace creates one, this can save a noticeable amount of
memory for kernel with net namespaces turned on.
After this set the lo device is actually allocated from a size-1024
kmem cache on i386 box even with NETPOLL and WIRELESS_EXT turned on.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
[NETNS]: Add netns refcnt debug for network devices.
dev_set_net is called for
- just allocated devices
- devices moving from one namespace to another
release_net has proper check inside to distinguish these cases.
Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
[NETNS]: Add netns refcnt debug for kernel sockets.
Protocol control sockets and netlink kernel sockets should not prevent the
namespace stop request. They are initialized and disposed in a special way by
sk_change_net/sk_release_kernel.
Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 08:23:02 +0000 (01:23 -0700)]
[IP6TUNNEL]: Make the fallback tunnel device per-net.
All the code, that reference it already has the ip6_tnl_net pointer,
so s/ip6_fb_tnl_dev/ip6n->fb_tnl_dev/ and move creation/releasing
code into net init/exit ops.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 08:09:44 +0000 (01:09 -0700)]
[GRE]: Use proper net in hash-lookup functions.
This is the part#2 of the patch #2 - get the proper net for
these functions. This change in a separate patch in order not
to get lost in a large previous patch.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 07:55:06 +0000 (00:55 -0700)]
[VLAN]: Allow vlan devices registration in net namespaces.
This one is similar to what I've done for TUN - set the proper
net after device allocation and clean VLANs on net exit (use the
rtnl_kill_links helper finally).
Plus, drop explicit init_net usage and net != &init_net checks.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 07:48:04 +0000 (00:48 -0700)]
[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>
Pavel Emelyanov [Wed, 16 Apr 2008 07:41:53 +0000 (00:41 -0700)]
[TUN]: Allow to register tun devices in namespace.
This is basically means that a net is set for a new device, but
actually also involves two more steps:
1. mark the tun device as "local", i.e. do not allow for it to
move across namespaces.
This is done so, since tun device is most often associated to some
file (and thus to some process) and moving the device alone is not
valid while keeping the file and the process outside. The need in
ability to move a detached persistent device is to be investigated
later.
2. get the tun device's net when tun becomes attached and put one
when it becomes detached.
This is needed to handle the case when a task owning the tun dies,
but a files lives for some more time - in this case we must not
allow for net to be freed, since its exit hook will spoil that file's
private data by unregistering the tun from under tun_chr_close.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 07:41:16 +0000 (00:41 -0700)]
[TUN]: Make the tun_dev_list per-net.
Remove the static tun_dev_list and replace its occurrences in
driver with per-net one.
It is used in two places - in tun_set_iff and tun_cleanup. In
the first case it's legal to use current net_ns. In the cleanup
call - move the loop, that unregisters all devices in net exit
hook.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 16 Apr 2008 07:40:46 +0000 (00:40 -0700)]
[TUN]: Introduce the tun_net structure and init/exit net ops.
This is the first step in making tuntap devices work in net
namespaces. The structure mentioned is pointed by generic
net pointer with tun_net_id id, and tun driver fills one on
its load. It will contain only the tun devices list.
So declare this structure and introduce net init and exit hooks.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Needed can only be more strict than what was checked by the
earlier common case check for non-tail skbs, thus
cwnd_len <= needed will never match in that case anyway.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Currently, it is not possible to read/write to an eeprom larger than
128k in size because the buffer used for temporarily storing the
eeprom contents is allocated using kmalloc. kmalloc can only allocate
a maximum of 128k depending on architecture.
Modified ethtool_get/set_eeprom to only allocate a page of memory and
then copy the eeprom a page at a time.
Updated original patch as per suggestions from Joe Perches.
Signed-off-by: Mandeep Singh Baines <msb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Oliver Hartkopp [Wed, 16 Apr 2008 02:29:14 +0000 (19:29 -0700)]
CAN: use hrtimers in can-bcm protocol
Make use of hrtimers to support high resolution capabilities, when
provided by the system clocksource.
The conversion to hrtimers additionally discovered and solved an
unlikely race condition that has been reproduced under (unrealistic)
massive receive load, which can only be produced on vcan software devices.
[ Fix printf format warnings on 64-bit -DaveM ]
Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Allan Stephens [Wed, 16 Apr 2008 02:04:54 +0000 (19:04 -0700)]
[TIPC]: Enhance validation of format on incoming messages
This patch ensures that TIPC properly handles incoming messages
that have incorrect or unexpected formats. Most significantly,
it now ensures that each sl_buff has at least as much data as
the message header indicates it should, and that the entire
message header is stored contiguously; this prevents TIPC from
accidentally accessing memory that is not part of the sk_buff.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Allan Stephens [Wed, 16 Apr 2008 02:03:23 +0000 (19:03 -0700)]
[TIPC]: Force linearization of non-linear sk_buffs
This patch allows TIPC to process incoming messages that are
stored in a fragmented sk_buff, by forcing the linearization
of any such messages it receives.
Note: This is an interim solution to allow TIPC to operate with
Ethernet devices that generate non-linear buffers (such as the
gianfar driver), until such time as the rest of TIPC is enhanced
to handle sk_buffs with multiple data areas.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Allan Stephens [Wed, 16 Apr 2008 02:02:30 +0000 (19:02 -0700)]
[TIPC]: Use fast buffer cloning to improve performance
This patch causes TIPC to allocate fast clonable sk_buffs,
rather than standard ones. This speeds up the cloning
operation done by the link code each time a message is sent
off-node.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Tue, 15 Apr 2008 07:36:08 +0000 (00:36 -0700)]
[NETNS]: The generic per-net pointers.
Add the elastic array of void * pointer to the struct net.
The access rules are simple:
1. register the ops with register_pernet_gen_device to get
the id of your private pointer
2. call net_assign_generic() to put the private data on the
struct net (most preferably this should be done in the
->init callback of the ops registered)
3. do not store any private reference on the net_generic array;
4. do not change this pointer while the net is alive;
5. use the net_generic() to get the pointer.
When adding a new pointer, I copy the old array, replace it
with a new one and schedule the old for kfree after an RCU
grace period.
Since the net_generic explores the net->gen array inside rcu
read section and once set the net->gen->ptr[x] pointer never
changes, this grants us a safe access to generic pointers.
Quoting Paul: "... RCU is protecting -only- the net_generic
structure that net_generic() is traversing, and the [pointer]
returned by net_generic() is protected by a reference counter
in the upper-level struct net."
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Tue, 15 Apr 2008 07:35:23 +0000 (00:35 -0700)]
[NETNS]: The net-subsys IDs generator.
To make some per-net generic pointers, we need some way to address
them, i.e. - IDs. This is simple IDA-based IDs generator for pernet
subsystems.
Addressing questions about potential checkpoint/restart problems:
these IDs are "lite-offsets" within the net structure and are by no
means supposed to be exported to the userspace.
Since it will be used in the nearest future by devices only (tun,
vlan, tunnels, bridge, etc), I make it resemble the functionality
of register_pernet_device().
The new ids is stored in the *id pointer _before_ calling the init
callback to make this id available in this callback.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
projects / linux-2.6 / log