Commit Graph

415 Commits

Author SHA1 Message Date
David S. Miller 1e42198609 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-04-17 23:56:30 -07:00
Johannes Berg 30b89b0f5e mac80211: rework scanning to account for probe response/beacon difference
This patch reworks the scanning code (ieee80211_rx_bss_info) to take
more parameters from beacons and keep a BSS info structure alive when
only beacons for it are received. This fixes a problem with iwlwifi
drivers (where we don't understand the root cause of the problem yet)
and another driver for some broken hardware (which cannot send probe
requests unless associated, so can't always actively scan.)

Signed-off-by: Bill Moss <bmoss@clemson.edu>
[jmberg: reformatted comments, make probe_resp a bool]
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-16 16:00:03 -04:00
Johannes Berg b454048cb9 mac80211: allow WDS mode
This allows creating interfaces in WDS mode or switching
existing ones into WDS mode (both via cfg80211 and wext.)

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-16 15:59:57 -04:00
Johannes Berg 245cbe7a65 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>
2008-04-16 15:59:57 -04:00
Johannes Berg b16bd15c37 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>
2008-04-16 15:59:57 -04:00
Reinette Chatre d18ef29f34 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>
2008-04-16 15:59:56 -04:00
Johannes Berg 98dd6a5759 mac80211: further RCU fixes
There were a few more instances of sta_info_get calls not being
protected by RCU, fix them.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-16 14:53:22 -04:00
Johannes Berg 3a24576690 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>
2008-04-16 14:53:22 -04:00
John W. Linville 50c4afb991 mlme.c: fixup some merge damage
This one got renamed, complicating the merge a bit...this should restore
it to its intended state.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-16 11:42:59 -04:00
Johannes Berg b3fc9c6c58 mac80211: remove message on receiving unexpected unencrypted frames
Some people are getting this message a lot, and we have traced it to
broken access points that much too often send completely empty frames
(all bytes zeroed, which they shouldn't do at all.)

Since we cannot do anything about such frames in any case except the
special case where we're debugging an AP, just remove the message.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-15 15:04:36 -04:00
Vladimir Koutny 216bce90b8 mac80211: use short_preamble mode from capability if ERP IE not present
When associating to a b-only AP where there is no ERP IE, short preamble
mode is left at previous state (probably also protection mode). In this
case, disable protection and use short preamble mode as specified in
capability field. The same is done if capability field is changed on-the-fly.

Signed-off-by: Vladimir Koutny <vlado@ksp.sk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-09 10:33:49 -04:00
Johannes Berg d9c58f30b0 mac80211: fix key debugfs default_key link
The default_key symlink points to the key index rather than
they key counter, fix it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:46:36 -04:00
Johannes Berg 2c8dccc774 mac80211: rename files
This patch renames all mac80211 files (except ieee80211_i.h) to get rid
of the useless ieee80211_ prefix.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:45 -04:00
Johannes Berg 3b96766f0e mac80211: fix key vs. sta locking problems
Up to now, key manipulation is supposed to run under RTNL to
avoid concurrent manipulations and also allow the set_key()
hardware callback to sleep. This is not feasible because STA
structs are rcu-protected and thus a lot of operations there
cannot take the RTNL. Also, key references are rcu-protected
so we cannot do things atomically.

This patch changes key locking completely:
 * key operations are now atomic
 * hardware crypto offload is enabled and disabled from
   a workqueue, due to that key freeing is also delayed
 * debugfs code is also run from a workqueue
 * keys reference STAs (and vice versa!) so during STA
   unlink the STAs key reference is removed but not the
   keys STA reference, to avoid races key todo work is
   run before STA destruction.
 * fewer STA operations now need the RTNL which was
   required due to key operations

This fixes the locking problems lockdep pointed out and also
makes things more light-weight because the rtnl isn't required
as much.

Note that the key todo lock/key mutex are global locks, this
is not required, of course, they could be per-hardware instead.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:45 -04:00
Johannes Berg 7d1559f173 mac80211: fix sta-info pinning
When a STA is supposed to be unlinked but is pinned, it still needs
to be unlinked from all structures. Only at the end of the unlink
process should we check for pin status and invalidate the callers
reference if it is pinned. Move the pin status check down.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:45 -04:00
Jiri Slaby 4d6141c30a mac80211: fix defined but not used
These two symbols are used only in ifdeffed function. Move them to that
section too.
net/mac80211/sta_info.c:387: warning: `__sta_info_pin' defined but not used
net/mac80211/sta_info.c:397: warning: `__sta_info_unpin' defined but not used

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Michael Wu <flamingice@sourmilk.net>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:45 -04:00
Ron Rindjunsky 513a1025fd mac80211: BA session debug prints changes
This patch contains next issues:
1 - prevents "stop BA session" multiple warnings
2 - adds debug print to stop Rx BA session flow
3 - adds EOL in one debug print

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:44 -04:00
Mohamed Abbas 84363e6e07 mac80211: notify mac from low level driver (iwlwifi)
Add new API to MAC80211 to allow low level driver to
notify MAC with driver status.

Signed-off-by: Mohamed Abbas <mabbas@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:43 -04:00
Johannes Berg 380a942b91 mac80211: fix ieee80211_ioctl_giwrate
The ieee80211_ioctl_giwrate() ioctl handler doesn't rcu_read_lock()
its access to the sta table, fix it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:43 -04:00
Johannes Berg bebb8a5e2c mac80211: make debugfs files root-only
Unfortunately, debugfs can be made to access invalid memory by
open()ing a file and then waiting until the corresponding debugfs
file has been removed (and, probably, the underlying object.)

That could be exploited by any user if the user is able to open
debugfs files and can cause networking devices, STA entries or
similar to disappear which is quite easy to do.

Hence, all debugfs files should be root-only.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:43 -04:00
Reinette Chatre 41a7be4858 mac80211: notify upper layers after lower
When drivers receive change notification they may do work that
will enable the changes to take effect. For example, if new association
the device needs to be programmed with this information.
Give the driver chance to make the changes before notifying the
upper layer - thus preventing race condition where upper layer
attempts to utilize state that may not be configured yet.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:43 -04:00
Johannes Berg 9cfb0009da mac80211: clean up IEEE80211_FC use
Really doesn't need to be defined four times.

Also, while at it, remove a useless macro (IEEE80211_ALIGN32_PAD)
and a function prototype for a function we don't actually have
(ieee80211_set_compression.)

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:41 -04:00
Johannes Berg 49ec6fa220 mac80211: fix possible sta-debugfs work lockup
Because we queue the sta-debugfs-adding work on our mac80211
workqueue (which needs to be flushed under RTNL) and that work
needs the RTNL, it can currently deadlock, thanks to Reinette
Chatre for pointing out the lockdep warning about this.

This patch fixes it by moving this work to the common kernel
workqueue (using schedule_work) and canceling it as appropriate.

It also fixes a related problem: When a STA is pinned by the
debugfs adding work and sta_info_flush() runs concurrently
it is not guaranteed that all STAs are removed from the driver
before the corresponding interface is removed which may lead
to bugs.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 16:44:41 -04:00
Chr fff7710937 mac80211: add station aid into ieee80211_tx_control
This patch is necessary for the upcoming Accesspoint patch for p54.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 15:05:57 -04:00
Tomas Winkler 21c0cbe760 mac80211: add association capabilty and timing info into bss_conf
This patch adds assocation capability, timestamp (tsf) and beacon interval
to bss_conf. This is required for successful assocation of iwlwifi drivers

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 15:05:56 -04:00
Tomas Winkler 38668c059f mac80211: eliminate conf_ht
This patch eliminates the use of conf_ht, replacing it with
bss_info_changed.

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>
2008-04-08 15:05:56 -04:00
John W. Linville 2473670163 Revert "mac80211: use a struct for bss->mesh_config"
This reverts commit 6c4711b469.

That patch breaks mesh config comparison between beacons/probe reponses, so
every beacon from a mesh network would be added as a new bss. Since the
comparison has to be performed for every received beacon I believe it is best to
save the mesh config in a format easy to compare, rather than do a bunch of
unaligned accesses to compare field by field.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-08 14:15:46 -04:00
David S. Miller e1ec1b8ccd Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:

	drivers/net/s2io.c
2008-04-02 22:35:23 -07:00
Luis Carlos Cobo 6c4711b469 mac80211: use a struct for bss->mesh_config
This allows cleaner code when accesing bss->mesh_config components.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:12 -04:00
Luis Carlos Cobo 05e5e88373 mac80211: check for mesh_config length on incoming management frames
Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:12 -04:00
Luis Carlos Cobo 966a542822 mac80211: use recent multicast table for all mesh multicast frames
...not only broadcast.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:11 -04:00
Luis Carlos Cobo cb585bccfe mac80211: fix spinlock recursion on sta expiration
Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:11 -04:00
Luis Carlos Cobo 73bb3e4a7a mac80211: fix deadlocks in debugfs_netdev.c
The bug shows up with CONFIG_PREEMPT enabled. Pointed out by Andrew Morton.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:11 -04:00
Johannes Berg 7e879b551f mac80211: fix sparse complaint in ieee80211_sta_def_wmm_params
A variable 'i' is being shadowed by another one, but the second
one can just be removed.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Vladimir Koutny <vlado@work.ksp.sk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:10 -04:00
Johannes Berg dc6676b7f2 mac80211: sta_info_flush() fixes
When the IBSS code tries to flush the STA list, it does so in
an atomic context. Flushing isn't safe there, however, and
requires the RTNL, so we need to defer it to a workqueue.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:10 -04:00
Johannes Berg 4f6fab472c mac80211: clean up sta_info_destroy() users wrt. RCU/locking
Calling sta_info_destroy() doesn't require RCU-synchronisation
before-hand because it does that internally. However, it does
require rtnl-locking so insert that where necessary.

Also clean up the code doing it internally to be a bit clearer and
not synchronize twice if keys are configured.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:10 -04:00
Johannes Berg 93e5deb1ae mac80211: automatically free sta struct when insertion fails
When STA structure insertion fails, it has been allocated but isn't
really alive yet, it isn't reachable by any other code and also can't
yet have much configured. This patch changes the code so that when
the insertion fails, the resulting STA pointer is no longer valid
because it is freed.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:10 -04:00
Johannes Berg 97bff8ecf4 mac80211: fix sta_info_destroy(NULL)
sta_info_destroy(NULL) should be valid, but currently isn't because
the argument is dereferenced before the NULL check. There are no
users that currently pass in NULL, i.e. all check before calling the
function, but I want to change that.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:09 -04:00
Johannes Berg 9dd6aed05b mac80211 ibss: flush only stations belonging to current interface
When joining a new IBSS, all old stations are flushed, but currently
all stations belonging to all virtual interfaces are flushed, which
is wrong. This patch fixes it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:14:09 -04:00
Andrew Morton 0675abdbfb net/mac80211/debugfs_netdev.c: use of bool triggers a gcc bug
This bool causes my gcc-4.1.0 alpha cross compiler to go into an infinite
loop.  Switching it to u8 works around that.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 17:13:17 -04:00
Vladimir Koutny d43c7b37ad mac80211: correct use_short_preamble handling
ERP IE bit for preamble mode is 0 for short and 1 for long, not the other
way around. This fixes the value reported to the driver via
bss_conf->use_short_preamble field.

Signed-off-by: Vladimir Koutny <vlado@ksp.sk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 15:44:08 -04:00
Jan Niehusmann 64f851e410 mac80211: trigger ieee80211_sta_work after opening interface
ieee80211_sta_work is disabled while network interface
is down. Therefore, if you configure wireless parameters
before bringing the interface up, these configurations are
not yet effective and association fails.

A workaround from userspace is calling a command like
'iwconfig wlan0 ap any' after the interface is brought up.

To fix this behaviour, trigger execution of ieee80211_sta_work from
ieee80211_open when in STA or IBSS mode.

Signed-off-by: Jan Niehusmann <jan@gondor.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-01 15:44:07 -04:00
Johannes Berg 056cdd599d mac80211: reorder fields to make some structures smaller
This patch reorders some fields in various structures to have
less padding within the structures, making them smaller. It
doesn't yet make any type adjustments, but often size_t is used
for example for IE lengths which is total overkill since size_t
will be 8 bytes long on 64-bit yet the length can at most fill
a u8.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-27 16:08:07 -04:00
Ron Rindjunsky cee24a3e58 mac80211: A-MPDU MLME use dynamic allocation
This patch alters the A-MPDU MLME in sta_info to use dynamic allocation,
thus drastically improving memory usage - from a constant ~2 Kbyte in
the previous (static) allocation to a lower limit of ~200 Byte and an upper
limit of ~2 Kbyte.

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>
2008-03-27 16:03:20 -04:00
Ron Rindjunsky 2470918275 mac80211: fix wrong Rx A-MPDU control via debugfs
This patch eliminate the use of buf_size as a trigger in favor of a new
flag to control Rx A-MPDU sessions through debugfs

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>
2008-03-27 16:03:17 -04:00
John W. Linville be892471c4 mac80211: silently accept deletion of non-existant key
Otherwise, 'iwconfig wlan0 key off' with no key set results in:

	Error for wireless request "Set Encode" (8B2A) :
	    SET failed on device wlan0 ; No such file or directory.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-27 15:51:20 -04:00
Vladimir Koutny e2839d8f50 mac80211: configure default wmm params correctly
Default WMM params have to be set according to beacon/probe response
information prior to authentication (or IBSS start/join); beacon queue
is configured only in IBSS. This does not affect the use of 'real' WMM
params as reported by AP.

Signed-off-by: Vladimir Koutny <vlado@ksp.sk>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-25 16:41:57 -04:00
Mohamed Abbas 675ef586f0 mac80211: prevent tuning during scanning
Postpone calling ieee80211_hw_config if hardware scanning is active.
This is similar to solution for software scanning where channel setting
is delayed until scan complete.

Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-25 16:41:57 -04:00
Ron Rindjunsky 85249e5fab mac80211: tear down of block ack sessions
This patch adds a clean tear down for all block ack sessions if interface
goes down or if a deauthentication is done.

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>
2008-03-25 16:41:57 -04:00
Ron Rindjunsky 7b9d44cd6b mac80211: fixing debug prints for AddBA request
This patch also fixes the Rx timer's comments

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>
2008-03-25 16:41:56 -04:00