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* the scheduled rc80211-simple.c removalAdrian Bunk2008-03-135-438/+1
| | | | | | Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: don't call conf_tx under RCU lockJohannes Berg2008-03-071-3/+3
| | | | | | | | | | | Reinette pointed out that with the sta_info RCU-ification the behaviour here changed and the conf_tx callback is now invoked under RCU read lock. That is not necessary so this patch restores the original behaviour Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Tested-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix hardware scan completionJohannes Berg2008-03-061-7/+18
| | | | | | | | | | | The mac80211 MLME requires restarting timers after a scan completes but this wasn't done when hardware scan offload was added, so add it now. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Tested-by: Bill Moss <bmoss@clemson.edu> Cc: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix mesh_path and sta_info get_by_idx functionsLuis Carlos Cobo2008-03-062-4/+8
| | | | | | | | Skip properly entries whose dev does not match. 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>
* mac80211: path IE fields macros, fix alignment problems and clean upLuis Carlos Cobo2008-03-061-33/+35
| | | | | | 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>
* mac80211: add PLINK_ prefix and kernel doc to enum plink_stateLuis Carlos Cobo2008-03-066-51/+65
| | | | | | 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>
* mac80211: always force mesh_path deletionsLuis Carlos Cobo2008-03-064-27/+11
| | | | | | | | Postponing the deletion is not really useful anymore. 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>
* mac80211: delete mesh_path timer on mesh_path removalLuis Carlos Cobo2008-03-061-0/+1
| | | | | | | | This avoids dereferencing a no longer existing struct mesh_path. 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>
* mac80211: clean up use of endianness conversion functionsLuis Carlos Cobo2008-03-062-16/+16
| | | | | | 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>
* mac80211: breakdown mesh network attributes in different extra fields for wextLuis Carlos Cobo2008-03-061-9/+26
| | | | | | 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>
* mac80211: move comment to better locationLuis Carlos Cobo2008-03-061-5/+5
| | | | | | 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>
* mac80211: fix incorrect parenthesisLuis Carlos Cobo2008-03-061-2/+2
| | | | | | | | Pointed out by Johannes Berg. 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>
* mac80211: fix mesh endianness sparse warnings and unmark it as brokenLuis Carlos Cobo2008-03-063-15/+16
| | | | | | | | | | This patch fixes all the mesh related endianness warnings reported by sparse. As they were the reason why Johannes marked mesh as BROKEN, that flag has been removed. 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>
* mac80211: always insert key into listJohannes Berg2008-03-061-3/+3
| | | | | | | | | | | Today I hit one of my new WARN_ONs in the mac80211 code because a key wasn't being freed correctly. After wondering for a while I finally tracked it to the fact that STA keys aren't added to the per-sdata key list correctly, they are supposed to always be on that list, not just for default keys. This patch fixes that. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix sta_info mesh timer bugJohannes Berg2008-03-064-42/+37
| | | | | | | | | | | | | | I noticed a bug I introduced when mesh is enabled: sta_info_destroy() will end up calling cancel_timer() on a timer that has never been initialized because the timer is only initialized in mesh_plink_alloc(), not in sta_info_alloc(). This patch moves the initialization of all mesh related fields into sta_info_alloc(), adds a bit of sanity checking to the cfg80211 handlers and sta_info_insert() and makes mesh_plink_alloc() a static helper function that is only used from the mesh plink code. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: add documentation bookJohannes Berg2008-03-062-10/+10
| | | | | | | | | | | | | | Quite a while ago I started this book. The required kernel-doc patches have since gone into the tree so it is now possible to build the book in mainline. The actual documentation is still rather incomplete and not all things are linked into the book, but this enables us to edit the documentation collaboratively, hopefully driver authors can add documentation based on their experience with mac80211. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: don't clear next_hop in path reclaimJohannes Berg2008-03-061-1/+0
| | | | | | | | | Luis pointed out that this path is going to be freed right away anyway so there's no point in assigning next_hop. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: remove STA entries when taking down interfaceJohannes Berg2008-03-066-83/+73
| | | | | | | | | | | | | | | | | | | | | When we take down an interface, we need to remove the STA info items that belong to it because otherwise we might invoke a sta_notify() callback in the driver when we later delete the STA entries, but in that case the driver will already have removed its knowledge of the interface they belonged to leading to confusion. Also, we could invoke the set_tim() callback after the driver removed its knowledge of the interface, which can lead to a crash if it requests a beacon with a then-invalid vif pointer! A side effect of this patch is that, because it was easier, it disallows changing the WDS peer while an interface is up. Should that actually be necessary, it can be added back, but the WDS peer STA entry may not be added while the interface is UP so for now I've simplified the WDS peer's STA entry lifetime management. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: clean up sta_info and document lockingJohannes Berg2008-03-062-54/+83
| | | | | | | | | | This patch cleans up the sta_info struct and documents how each set of variables is locked. Notably, flags locking is completely missing. It also adds kernel-doc for some (but not all yet) members of the struct. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: split sta_info_addJohannes Berg2008-03-067-74/+166
| | | | | | | | | | | | | | | | | | sta_info_add() has two functions: allocating a station info structure and inserting it into the hash table/list. Splitting these two functions allows allocating with GFP_KERNEL in many places instead of GFP_ATOMIC which is now required by the RCU protection. Additionally, in many places RCU protection is now no longer needed at all because between sta_info_alloc() and sta_info_insert() the caller owns the structure. This fixes a few race conditions with setting initial flags and similar, but not all (see comments in ieee80211_sta.c and cfg.c). More documentation on the existing races will be in a follow-up patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: RCU-ify STA info structure accessJohannes Berg2008-03-0623-461/+668
| | | | | | | | | | | | | | | This makes access to the STA hash table/list use RCU to protect against freeing of items. However, it's not a true RCU, the copy step is missing: whenever somebody changes a STA item it is simply updated. This is an existing race condition that is now somewhat understandable. This patch also fixes the race key freeing vs. STA destruction by making sure that sta_info_destroy() is always called under RTNL and frees the key. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: split ieee80211_txrx_dataJohannes Berg2008-03-068-306/+315
| | | | | | | | Split it into ieee80211_tx_data and ieee80211_rx_data to clarify usage/flag usage and remove the stupid union thing. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: reorder a few fields in sta_infoJohannes Berg2008-03-061-2/+2
| | | | | | | | Three __le16s followed by an enum (int) leave a two-byte hole of padding which we can use for two of the other fields. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix kernel-doc comment for mesh_plink_deactivateJohannes Berg2008-03-061-1/+1
| | | | | | | | Accidentally copied in a __mesh_plink_deactivate, noticed by Luis Carlos Cobo. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: clean up mesh RX path a bit moreJohannes Berg2008-03-062-11/+14
| | | | | | | | | Moves another ifdef into the sta_info header file in favour of compiling more code even w/o CONFIG_MAC80211_MESH. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: export mesh_plink_brokenJohannes Berg2008-03-061-0/+1
| | | | | | | | This needs to be exported because rate control algorithms can be modular. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: clarify mesh KconfigJohannes Berg2008-03-061-2/+3
| | | | | | | | This clarifies that the mesh networking code is currently based on Draft 1.08 of the 802.11 Mesh Networking amendment. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: add missing "break" statement in mesh codeJohannes Berg2008-03-061-0/+1
| | | | | | | | | | | This inserts a missing break statement which, if hit, would cause the code to fall-through and unlock a spinlock twice. Noticed via sparse's "lock count wrong in basic block" warning and careful code inspection. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: enable mesh in KconfigJohannes Berg2008-03-062-0/+21
| | | | | | | Currently marked BROKEN because of endianness problems. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh hwmp locking fixesJohannes Berg2008-03-061-1/+4
| | | | | | | This fixes missing unlocks noticed by sparse. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: clean up mesh codeJohannes Berg2008-03-0614-272/+269
| | | | | | | Various cleanups, reducing the #ifdef mess and other things. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: complete the mesh (interface handling) codeLuis Carlos Cobo2008-03-061-1/+27
| | | | | | | | | This completes the mesh interface handling code and a few other bits about the mac80211 module. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh path and mesh peer configurationLuis Carlos Cobo2008-03-061-10/+259
| | | | | | | | | This adds code to allow adding mesh interfaces and configuring mesh peers etc. Also, it adds code for station dumping. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh statistics and config through debugfsLuis Carlos Cobo2008-03-061-0/+197
| | | | | | | | | | This patch contains the debugfs code for mesh statistics and configuration parameters. Please note that generic support for r/w debugfs attributes has been added. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: code for on-demand Hybrid Wireless Mesh ProtocolLuis Carlos Cobo2008-03-061-0/+862
| | | | | | | | | | | | | | | | | | | | | | This file implements the on-demand Hybrid Wireless Mesh Protocol, at this moment using hop-count as the metric. When no mesh path exists for a given destination or the mesh path is not active, frames addressed to that destination will be queued and a Path Request frame will be sent. Queued frames will be sent when the path is resolved (usually after reception of a Path Response) or discarded if discovery times out. Path Requests will also be sent to refresh paths that are being used and are close to expiring. Path Errors are sent when a path discovery process triggered by the attempt to forward a frame originated in a different mesh point times out. Path Errors are also sent when a peer link is determined to be unreachable because of high error rates. Multiple destination support in Path Requests and Path Errors and precursors have not been implemented yet. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh path table implementationLuis Carlos Cobo2008-03-061-0/+522
| | | | | | | | | | | | | | | | | | | | The mesh path table associates destinations with the next hop to reach them. The table is a hash of linked lists protected by rcu mechanisms. Every mesh path contains a lock to protect the mesh path state. Each outgoing mesh frame requires a look up into this table. Therefore, the table it has been designed so it is not necessary to hold any lock to find the appropriate next hop. If the path is determined to be active within a rcu context we can safely dereference mpath->next_hop->addr, since it holds a reference to the sta next_hop. After a mesh path has been set active for the first time it next_hop must always point to a valid sta. If this is not possible the mpath must be deleted or replaced in a RCU safe fashion. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh peer link implementationLuis Carlos Cobo2008-03-061-0/+755
| | | | | | | | | | | This file implements mesh discovery and peer link establishment support using the mesh peer link table provided in mesh_plinktbl.c. Secure peer links have not been implemented yet. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh changes to the MLMELuis Carlos Cobo2008-03-061-59/+263
| | | | | | | | | | | This includes support for mesh network scanning. The ugly code in ieee80211_sta_scan_result() is my approach to work around wext. This has been tested with wireless tools version 29 and works as expected (the new interface mode is just not shown). Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh data structures and first mesh changesLuis Carlos Cobo2008-03-0610-50/+394
| | | | | | | | | Includes integration in struct sta_info of mesh peer link elements, previously on their own mesh peer link table. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: support for mesh interfaces in mac80211 data pathLuis Carlos Cobo2008-03-062-33/+246
| | | | | | | | | This changes the TX/RX paths in mac80211 to support mesh interfaces. This code will be cleaned up later again before being enabled. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: support functions for meshLuis Carlos Cobo2008-03-061-0/+383
| | | | | | | | | | | | | | | | | | The two important features coded in mesh.c are: Recently Multicast Cache: in on-demand HWMP, multicast traffic is retransmitted by every receiving node. Even though a mesh TTL counter avoids infinite loops, it is also necessary to avoid traffic explosion by keeping a cache of multicast mesh frame that have been received recently. With this feature, maximum number of retransmissions of a multicast frame for the case of N nodes within the range of each other would be N. Without it, the maximum number of retransmissions would be in the order of N^(MESH_TTL - 1). Code to support mesh tables. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: mesh function and data structures definitionsLuis Carlos Cobo2008-03-061-0/+283
| | | | | | Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: add mesh interface typeJohannes Berg2008-03-064-0/+13
| | | | | | | This adds the mesh interface type. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* nl80211/cfg80211: support for mesh, sta dumpingLuis Carlos Cobo2008-03-061-9/+11
| | | | | | | | | Added support for mesh id and mesh path operation as well as station structure dumping. Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* net: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-03-061-1/+1
| | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* mac80211: fix key replacing, hw accelJohannes Berg2008-02-291-7/+20
| | | | | | | | | | | | | | | | | | | | Even though I thought about it a lot and had also tested it, some of my recent changes in the key code broke replacing keys, making the kernel oops because a key is removed from a list while not on it. This patch fixes that using the list as an indication whether or not the key is on it (an empty list means it's not on any list.) Also, this patch fixes hw accel enabling, the check for not doing hw accel when the interface is down was lost and is restored by this. Additionally, move adding the key to the list into the function __ieee80211_key_replace() for more consistency. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: split ieee80211_key_alloc/freeJohannes Berg2008-02-295-98/+203
| | | | | | | | | | | | | | | | | | | | In order to RCU-ify sta_info, we need to be able to allocate a key without linking it to an sdata/sta structure (because allocation cannot be done in an rcu critical section). This patch splits up ieee80211_key_alloc() and updates all users appropriately. While at it, this patch fixes a number of race conditions such as finally making key replacement atomic, unfortunately at the expense of more complex code. Note that this patch documents /existing/ bugs with sta info and key interaction, there is currently a race condition when a sta info is freed without holding the RTNL. This will finally be fixed by a followup patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: remove STA infos last_ack stuffJohannes Berg2008-02-294-39/+0
| | | | | | | | | | These things aren't used and the only possible use is within rate control algorithms, however those can, if they need it, keep track of it in their private data. last_ack_ms isn't even updated so completely useless. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: safely free beacon in ieee80211_if_reinitJohannes Berg2008-02-291-1/+5
| | | | | | | | | | | If ieee80211_if_reinit() is called from ieee80211_unregister_hw() then it is possible that the driver will still request a beacon (it is allowed to until ieee80211_unregister_hw() has returned.) This means we need to use an RCU-protected write to the beacon information even in this function. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix IBSS codeJohannes Berg2008-02-291-3/+3
| | | | | | | | | | | | | | | | | | This patch fixes two errors introduced by commit 19d35612f3cd7f60dd9174c0100584e21f5a1025 Author: Bruno Randolf <bruno@thinktube.com> Date: Mon Feb 18 11:21:36 2008 +0900 mac80211: enable IBSS merging The first error is an endianness problem that sparse found and the second is a build failure when CONFIG_MAC80211_IBSS_DEBUG is not set. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Bruno Randolf <bruno@thinktube.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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