kernel/linux.git/net/mac80211/mesh_sync.c, branch linux-4.4.y

mac80211: Remove invalid flag operations in mesh TSF synchronization

2017-11-30T08:37:27+00:00

[ Upstream commit 76f43b4c0a9337af22827d78de4f2b8fd5328489 ] mesh_sync_offset_adjust_tbtt() implements Extensible synchronization framework ([1] 13.13.2 Extensible synchronization framework). It shall not operate the flag "TBTT Adjusting subfield" ([1] 8.4.2.100.8 Mesh Capability), since it is used only for MBCA ([1] 13.13.4 Mesh beacon collision avoidance, see 13.13.4.4.3 TBTT scanning and adjustment procedures for detail). So this patch remove the flag operations. [1] IEEE Std 802.11 2012 Signed-off-by: Masashi Honma [remove adjusting_tbtt entirely, since it's now unused] Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

mac80211: move mesh related station fields to own struct

2015-07-17T13:38:06+00:00

There are now a fairly large number of mesh fields that really aren't needed in any other modes; move those into their own structure and allocate them separately. Signed-off-by: Johannes Berg

mac80211: remove BUG_ON usage

2014-04-29T15:59:27+00:00

These BUG_ON statements should never trigger, but in the unlikely event that somebody does manage don't stop everything but simply exit the code path with an error. Leave the one BUG_ON where changing it would result in a NULL pointer dereference. Signed-off-by: Johannes Berg

mac80211: update adjusting TBTT bit in beacon

2013-12-16T13:21:22+00:00

This regression was introduced in "mac80211: cache mesh beacon". mesh_sync_offset_adjust_tbtt() was assuming that the beacon would be rebuilt in every single pre-tbtt interrupt, but now the beacon update happens on the workqueue, and it must be ready for immediate delivery to the driver. Save a pointer to the meshconf IE in the beacon_data (this works because both the IE pointer and beacon buffer are protected by the same rcu_{dereference,assign_pointer}()) for quick updates during pre-tbtt. This is faster and a little prettier than iterating over the elements to find the meshconf IE every time. Signed-off-by: Thomas Pedersen Signed-off-by: Johannes Berg

mac80211: mesh: only get tsf if we need it

2013-12-02T10:51:52+00:00

The local TSF timer is used to compute the timing offset between mesh peers on beacon reception. However, asking the device for the TSF is not very accurate, so we prefer to use rx->mactime if available. In the latter case, calling drv_get_tsf() just adds more delay into the RX path, so skip it if we can. Signed-off-by: Bob Copeland Signed-off-by: Johannes Berg

mac80211: clean up mesh code

2013-02-15T14:46:37+00:00

There's various code with strange indentation, questionable loop and locking constructs, etc. The bigger change is moving the "sdata" argument to the first argument of all functions, like all other mac80211 functions that have one. Signed-off-by: Johannes Berg

mac80211: fix for mesh sync to indicate TBTT adjustment

2012-11-30T11:41:46+00:00

Currently the mesh sync code checks, whether peers indicate TBTT adjustment, but it never sets the corresponding flag itself. By setting ifmsh->tbtt_adjusting to true, it will set the corresponding field in the mesh configuration IE of own beacons. This indication will be set in the current beacon. The TBTT adjustment will be performed afterwards, affecting the next beacon. Thus, the first beacon with stable TBTT will not indicate adjustment anymore and peers will continue tracking the new offset. Signed-off-by: Marco Porsch Signed-off-by: Johannes Berg

mac80211: move Mesh Capability field definition to ieee80211.h

2012-11-26T10:35:21+00:00

Signed-off-by: Marco Porsch [prefix with IEEE80211_] Signed-off-by: Johannes Berg

mac80211: support RX_FLAG_MACTIME_END

2012-11-13T20:43:55+00:00

Allow drivers to indicate their mactime is at RX completion and adjust for this in mac80211. Also rename the existing RX_FLAG_MACTIME_MPDU to RX_FLAG_MACTIME_START to clarify its intent. Based on similar code by Johannes Berg. Signed-off-by: Thomas Pedersen [fix docs, atheros drivers] Signed-off-by: Johannes Berg

mac80211: remove unimplemented mesh vendor sync

2012-10-18T07:01:56+00:00

There's no vendor-specific mesh sync implemented and there don't need to be dummy handlers that only print messages, so remove that code. While at it, also constify the mesh sync ops. Signed-off-by: Johannes Berg