| 11b2357d5dbce999803e9055f8c09829a8a87db4 |
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20-Oct-2014 |
Karl Beldan <karl.beldan@rivierawaves.com> |
mac80211: minstrels: fix buffer overflow in HT debugfs rc_stats
ATM an HT rc_stats line is 106 chars.
Times 8(MCS_GROUP_RATES)*3(SS)*2(GI)*2(BW) + CCK(4), i.e. x100, this is
well above the current 8192 - sizeof(*ms) currently allocated.
Fix this by squeezing the output as follows (not that we're short on
memory but this also improves readability and range, the new format adds
one more digit to *ok/*cum and ok/cum):
- Before (HT) (106 ch):
type rate throughput ewma prob this prob retry this succ/attempt success attempts
CCK/LP 5.5M 0.0 0.0 0.0 0 0( 0) 0 0
HT20/LGI ABCDP MCS0 0.0 0.0 0.0 1 0( 0) 0 0
- After (75 ch):
type rate tpt eprob *prob ret *ok(*cum) ok( cum)
CCK/LP 5.5M 0.0 0.0 0.0 0 0( 0) 0( 0)
HT20/LGI ABCDP MCS0 0.0 0.0 0.0 1 0( 0) 0( 0)
- Align non-HT format Before (non-HT) (83 ch):
rate throughput ewma prob this prob this succ/attempt success attempts
ABCDP 6 0.0 0.0 0.0 0( 0) 0 0
54 0.0 0.0 0.0 0( 0) 0 0
- After (61 ch):
rate tpt eprob *prob *ok(*cum) ok( cum)
ABCDP 1 0.0 0.0 0.0 0( 0) 0( 0)
54 0.0 0.0 0.0 0( 0) 0( 0)
*This also adds dynamic checks for overflow, lowers the size of the
non-HT request (allowing > 30 entries) and replaces the buddy-rounded
allocations (s/sizeof(*ms) + 8192/8192).
Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| 5935839ad73583781b8bbe8d91412f6826e218a4 |
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09-Sep-2014 |
Thomas Huehn <thomas@net.t-labs.tu-berlin.de> |
mac80211: improve minstrel_ht rate sorting by throughput & probability
This patch improves the way minstrel_ht sorts rates according to throughput
and success probability. 3 FOR-loops across the entire rate and mcs group set
in function minstrel_ht_update_stats() which where used to determine the
fastest, second fastest and most robust rate are reduced to 2 FOR-loop.
The sorted list of rates according throughput is extended to the best four
rates as we need them in upcoming joint rate and power control. The sorting
is done via the new function minstrel_ht_sort_best_tp_rates(). The annotation
of those 4 best throughput rates in the debugfs file rc-stats is changes to:
"A,B,C,D", where A is the fastest rate and C the 4th fastest.
Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>
Tested-by: Stefan Venz <ikstream86@gmail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| 7a5e3fa2c81ca2fdc514c61ad90fb4e0b632258c |
|
11-Nov-2013 |
Karl Beldan <karl.beldan@rivierawaves.com> |
mac80211: minstrel_ht: replace some occurences of MCS_GROUP_RATES
Consecutive MCSes in [8*(NSS-1)->8*NSS[ have the same number NSS of
streams (except for MCS32 which is mishandled ATM).
ATM minstrel_ht uses MCS_GROUP_RATES in place of this 8 modulus.
This change replaces such occurences and by doing so allows for different
values of MCS_GROUP_RATES (e.g to cope with VHT MCS8,9).
Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| a0497f9f57478c5a37c5628eb32833dd9729a821 |
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13-Feb-2013 |
Felix Fietkau <nbd@openwrt.org> |
mac80211/minstrel_ht: add support for using CCK rates
When MCS rates start to get bad in 2.4 GHz because of long range or
strong interference, CCK rates can be a lot more robust.
This patch adds a pseudo MCS group containing CCK rates (long preamble
in the lower 4 slots, short preamble in the upper slots).
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
[make minstrel_ht_get_stats static]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| 7f4fe17bc2d4fd46598b03bc51281cfa7ef6abf5 |
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11-Feb-2013 |
Felix Fietkau <nbd@openwrt.org> |
mac80211/minstrel_ht: show the number of retries for each rate in debugfs
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| bc3b2d7fb9b014d75ebb79ba371a763dbab5e8cf |
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15-Jul-2011 |
Paul Gortmaker <paul.gortmaker@windriver.com> |
net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules
These files are non modular, but need to export symbols using
the macros now living in export.h -- call out the include so
that things won't break when we remove the implicit presence
of module.h from everywhere.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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| a0572d93c13d28cc25b2c286ec9378eeb4ddd46c |
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15-Aug-2010 |
Arnd Bergmann <arnd@arndb.de> |
mac80211: disallow seeks in minstrel debug code
No need for seek here, so let's just use nonseekable_open.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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| de66bfd85c817146825eaafb39d5872463c09e8c |
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24-Jun-2010 |
John W. Linville <linville@tuxdriver.com> |
minstrel_ht: move minstrel_mcs_groups declaration to header file
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
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| ec8aa669b8393b6789b1954d587c63264af7ff99 |
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13-May-2010 |
Felix Fietkau <nbd@openwrt.org> |
mac80211: add the minstrel_ht rate control algorithm
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
|