From: Adrian Bunk <bunk@xxxxxxxxxx> The scheduled rc80211-simple.c removal. Signed-off-by: Adrian Bunk <bunk@xxxxxxxxxx> Cc: "John W. Linville" <linville@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/feature-removal-schedule.txt | 10 net/mac80211/Kconfig | 19 net/mac80211/Makefile | 2 net/mac80211/ieee80211.c | 9 net/mac80211/ieee80211_rate.h | 15 net/mac80211/rc80211_simple.c | 400 ------------------- 6 files changed, 1 insertion(+), 454 deletions(-) diff -puN Documentation/feature-removal-schedule.txt~the-scheduled-rc80211-simplec-removal Documentation/feature-removal-schedule.txt --- a/Documentation/feature-removal-schedule.txt~the-scheduled-rc80211-simplec-removal +++ a/Documentation/feature-removal-schedule.txt @@ -220,16 +220,6 @@ Who: John W. Linville <linville@tuxdrive --------------------------- -What: rc80211-simple rate control algorithm for mac80211 -When: 2.6.26 -Files: net/mac80211/rc80211-simple.c -Why: This algorithm was provided for reference but always exhibited bad - responsiveness and performance and has some serious flaws. It has been - replaced by rc80211-pid. -Who: Stefano Brivio <stefano.brivio@xxxxxxxxx> - ---------------------------- - What (Why): - include/linux/netfilter_ipv4/ipt_TOS.h ipt_tos.h header files (superseded by xt_TOS/xt_tos target & match) diff -puN net/mac80211/Kconfig~the-scheduled-rc80211-simplec-removal net/mac80211/Kconfig --- a/net/mac80211/Kconfig~the-scheduled-rc80211-simplec-removal +++ a/net/mac80211/Kconfig @@ -32,15 +32,6 @@ config MAC80211_RC_DEFAULT_PID default rate control algorithm. You should choose this unless you know what you are doing. -config MAC80211_RC_DEFAULT_SIMPLE - bool "Simple rate control algorithm" - select MAC80211_RC_SIMPLE - ---help--- - Select the simple rate control as the default rate - control algorithm. Note that this is a non-responsive, - dumb algorithm. You should choose the PID rate control - instead. - config MAC80211_RC_DEFAULT_NONE bool "No default algorithm" depends on EMBEDDED @@ -57,7 +48,6 @@ comment "build the algorithm into mac802 config MAC80211_RC_DEFAULT string default "pid" if MAC80211_RC_DEFAULT_PID - default "simple" if MAC80211_RC_DEFAULT_SIMPLE default "" config MAC80211_RC_PID @@ -70,15 +60,6 @@ config MAC80211_RC_PID Say Y or M unless you're sure you want to use a different rate control algorithm. -config MAC80211_RC_SIMPLE - tristate "Simple rate control algorithm (DEPRECATED)" - ---help--- - This option enables a very simple, non-responsive TX - rate control algorithm. This algorithm is deprecated - and will be removed from the kernel in the near future. - It has been replaced by the PID algorithm. - - Say N unless you know what you are doing. endmenu config MAC80211_LEDS diff -puN net/mac80211/Makefile~the-scheduled-rc80211-simplec-removal net/mac80211/Makefile --- a/net/mac80211/Makefile~the-scheduled-rc80211-simplec-removal +++ a/net/mac80211/Makefile @@ -39,9 +39,7 @@ mac80211-$(CONFIG_MAC80211_DEBUGFS) += \ # Build rate control algorithm(s) -CFLAGS_rc80211_simple.o += -DRC80211_SIMPLE_COMPILE CFLAGS_rc80211_pid_algo.o += -DRC80211_PID_COMPILE -mac80211-$(CONFIG_MAC80211_RC_SIMPLE) += rc80211_simple.o mac80211-$(CONFIG_MAC80211_RC_PID) += $(rc-pid-$(CONFIG_MAC80211_RC_PID)) # Modular rate algorithms are assigned to mac80211-m - make separate modules diff -puN net/mac80211/ieee80211.c~the-scheduled-rc80211-simplec-removal net/mac80211/ieee80211.c --- a/net/mac80211/ieee80211.c~the-scheduled-rc80211-simplec-removal +++ a/net/mac80211/ieee80211.c @@ -1345,13 +1345,9 @@ static int __init ieee80211_init(void) BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); - ret = rc80211_simple_init(); - if (ret) - goto out; - ret = rc80211_pid_init(); if (ret) - goto out_cleanup_simple; + goto out; ret = ieee80211_wme_register(); if (ret) { @@ -1367,15 +1363,12 @@ static int __init ieee80211_init(void) out_cleanup_pid: rc80211_pid_exit(); - out_cleanup_simple: - rc80211_simple_exit(); out: return ret; } static void __exit ieee80211_exit(void) { - rc80211_simple_exit(); rc80211_pid_exit(); ieee80211_wme_unregister(); diff -puN net/mac80211/ieee80211_rate.h~the-scheduled-rc80211-simplec-removal net/mac80211/ieee80211_rate.h --- a/net/mac80211/ieee80211_rate.h~the-scheduled-rc80211-simplec-removal +++ a/net/mac80211/ieee80211_rate.h @@ -166,21 +166,6 @@ void rate_control_deinitialize(struct ie /* Rate control algorithms */ -#if defined(RC80211_SIMPLE_COMPILE) || \ - (defined(CONFIG_MAC80211_RC_SIMPLE) && \ - !defined(CONFIG_MAC80211_RC_SIMPLE_MODULE)) -extern int rc80211_simple_init(void); -extern void rc80211_simple_exit(void); -#else -static inline int rc80211_simple_init(void) -{ - return 0; -} -static inline void rc80211_simple_exit(void) -{ -} -#endif - #if defined(RC80211_PID_COMPILE) || \ (defined(CONFIG_MAC80211_RC_PID) && \ !defined(CONFIG_MAC80211_RC_PID_MODULE)) diff -puN net/mac80211/rc80211_simple.c~the-scheduled-rc80211-simplec-removal /dev/null --- a/net/mac80211/rc80211_simple.c +++ /dev/null @@ -1,400 +0,0 @@ -/* - * Copyright 2002-2005, Instant802 Networks, Inc. - * Copyright 2005, Devicescape Software, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/init.h> -#include <linux/netdevice.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/skbuff.h> -#include <linux/compiler.h> -#include <linux/module.h> - -#include <net/mac80211.h> -#include "ieee80211_i.h" -#include "ieee80211_rate.h" -#include "debugfs.h" - - -/* This is a minimal implementation of TX rate controlling that can be used - * as the default when no improved mechanisms are available. */ - -#define RATE_CONTROL_NUM_DOWN 20 -#define RATE_CONTROL_NUM_UP 15 - -#define RATE_CONTROL_EMERG_DEC 2 -#define RATE_CONTROL_INTERVAL (HZ / 20) -#define RATE_CONTROL_MIN_TX 10 - -static void rate_control_rate_inc(struct ieee80211_local *local, - struct sta_info *sta) -{ - struct ieee80211_sub_if_data *sdata; - struct ieee80211_hw_mode *mode; - int i = sta->txrate; - int maxrate; - - sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); - if (sdata->bss && sdata->bss->force_unicast_rateidx > -1) { - /* forced unicast rate - do not change STA rate */ - return; - } - - mode = local->oper_hw_mode; - maxrate = sdata->bss ? sdata->bss->max_ratectrl_rateidx : -1; - - if (i > mode->num_rates) - i = mode->num_rates - 2; - - while (i + 1 < mode->num_rates) { - i++; - if (sta->supp_rates & BIT(i) && - mode->rates[i].flags & IEEE80211_RATE_SUPPORTED && - (maxrate < 0 || i <= maxrate)) { - sta->txrate = i; - break; - } - } -} - - -static void rate_control_rate_dec(struct ieee80211_local *local, - struct sta_info *sta) -{ - struct ieee80211_sub_if_data *sdata; - struct ieee80211_hw_mode *mode; - int i = sta->txrate; - - sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); - if (sdata->bss && sdata->bss->force_unicast_rateidx > -1) { - /* forced unicast rate - do not change STA rate */ - return; - } - - mode = local->oper_hw_mode; - if (i > mode->num_rates) - i = mode->num_rates; - - while (i > 0) { - i--; - if (sta->supp_rates & BIT(i) && - mode->rates[i].flags & IEEE80211_RATE_SUPPORTED) { - sta->txrate = i; - break; - } - } -} - -struct global_rate_control { - int dummy; -}; - -struct sta_rate_control { - unsigned long last_rate_change; - u32 tx_num_failures; - u32 tx_num_xmit; - - unsigned long avg_rate_update; - u32 tx_avg_rate_sum; - u32 tx_avg_rate_num; - -#ifdef CONFIG_MAC80211_DEBUGFS - struct dentry *tx_avg_rate_sum_dentry; - struct dentry *tx_avg_rate_num_dentry; -#endif -}; - - -static void rate_control_simple_tx_status(void *priv, struct net_device *dev, - struct sk_buff *skb, - struct ieee80211_tx_status *status) -{ - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - struct sta_info *sta; - struct sta_rate_control *srctrl; - - sta = sta_info_get(local, hdr->addr1); - - if (!sta) - return; - - srctrl = sta->rate_ctrl_priv; - srctrl->tx_num_xmit++; - if (status->excessive_retries) { - srctrl->tx_num_failures++; - sta->tx_retry_failed++; - sta->tx_num_consecutive_failures++; - sta->tx_num_mpdu_fail++; - } else { - sta->last_ack_rssi[0] = sta->last_ack_rssi[1]; - sta->last_ack_rssi[1] = sta->last_ack_rssi[2]; - sta->last_ack_rssi[2] = status->ack_signal; - sta->tx_num_consecutive_failures = 0; - sta->tx_num_mpdu_ok++; - } - sta->tx_retry_count += status->retry_count; - sta->tx_num_mpdu_fail += status->retry_count; - - if (time_after(jiffies, - srctrl->last_rate_change + RATE_CONTROL_INTERVAL) && - srctrl->tx_num_xmit > RATE_CONTROL_MIN_TX) { - u32 per_failed; - srctrl->last_rate_change = jiffies; - - per_failed = (100 * sta->tx_num_mpdu_fail) / - (sta->tx_num_mpdu_fail + sta->tx_num_mpdu_ok); - /* TODO: calculate average per_failed to make adjusting - * parameters easier */ -#if 0 - if (net_ratelimit()) { - printk(KERN_DEBUG "MPDU fail=%d ok=%d per_failed=%d\n", - sta->tx_num_mpdu_fail, sta->tx_num_mpdu_ok, - per_failed); - } -#endif - - /* - * XXX: Make these configurable once we have an - * interface to the rate control algorithms - */ - if (per_failed > RATE_CONTROL_NUM_DOWN) { - rate_control_rate_dec(local, sta); - } else if (per_failed < RATE_CONTROL_NUM_UP) { - rate_control_rate_inc(local, sta); - } - srctrl->tx_avg_rate_sum += status->control.rate->rate; - srctrl->tx_avg_rate_num++; - srctrl->tx_num_failures = 0; - srctrl->tx_num_xmit = 0; - } else if (sta->tx_num_consecutive_failures >= - RATE_CONTROL_EMERG_DEC) { - rate_control_rate_dec(local, sta); - } - - if (srctrl->avg_rate_update + 60 * HZ < jiffies) { - srctrl->avg_rate_update = jiffies; - if (srctrl->tx_avg_rate_num > 0) { -#ifdef CONFIG_MAC80211_VERBOSE_DEBUG - DECLARE_MAC_BUF(mac); - printk(KERN_DEBUG "%s: STA %s Average rate: " - "%d (%d/%d)\n", - dev->name, print_mac(mac, sta->addr), - srctrl->tx_avg_rate_sum / - srctrl->tx_avg_rate_num, - srctrl->tx_avg_rate_sum, - srctrl->tx_avg_rate_num); -#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ - srctrl->tx_avg_rate_sum = 0; - srctrl->tx_avg_rate_num = 0; - } - } - - sta_info_put(sta); -} - - -static void -rate_control_simple_get_rate(void *priv, struct net_device *dev, - struct ieee80211_hw_mode *mode, - struct sk_buff *skb, - struct rate_selection *sel) -{ - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - struct ieee80211_sub_if_data *sdata; - struct sta_info *sta; - int rateidx; - u16 fc; - - sta = sta_info_get(local, hdr->addr1); - - /* Send management frames and broadcast/multicast data using lowest - * rate. */ - fc = le16_to_cpu(hdr->frame_control); - if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA || - is_multicast_ether_addr(hdr->addr1) || !sta) { - sel->rate = rate_lowest(local, mode, sta); - if (sta) - sta_info_put(sta); - return; - } - - /* If a forced rate is in effect, select it. */ - sdata = IEEE80211_DEV_TO_SUB_IF(dev); - if (sdata->bss && sdata->bss->force_unicast_rateidx > -1) - sta->txrate = sdata->bss->force_unicast_rateidx; - - rateidx = sta->txrate; - - if (rateidx >= mode->num_rates) - rateidx = mode->num_rates - 1; - - sta->last_txrate = rateidx; - - sta_info_put(sta); - - sel->rate = &mode->rates[rateidx]; -} - - -static void rate_control_simple_rate_init(void *priv, void *priv_sta, - struct ieee80211_local *local, - struct sta_info *sta) -{ - struct ieee80211_hw_mode *mode; - int i; - sta->txrate = 0; - mode = local->oper_hw_mode; - /* TODO: This routine should consider using RSSI from previous packets - * as we need to have IEEE 802.1X auth succeed immediately after assoc.. - * Until that method is implemented, we will use the lowest supported rate - * as a workaround, */ - for (i = 0; i < mode->num_rates; i++) { - if ((sta->supp_rates & BIT(i)) && - (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) { - sta->txrate = i; - break; - } - } -} - - -static void * rate_control_simple_alloc(struct ieee80211_local *local) -{ - struct global_rate_control *rctrl; - - rctrl = kzalloc(sizeof(*rctrl), GFP_ATOMIC); - - return rctrl; -} - - -static void rate_control_simple_free(void *priv) -{ - struct global_rate_control *rctrl = priv; - kfree(rctrl); -} - - -static void rate_control_simple_clear(void *priv) -{ -} - - -static void * rate_control_simple_alloc_sta(void *priv, gfp_t gfp) -{ - struct sta_rate_control *rctrl; - - rctrl = kzalloc(sizeof(*rctrl), gfp); - - return rctrl; -} - - -static void rate_control_simple_free_sta(void *priv, void *priv_sta) -{ - struct sta_rate_control *rctrl = priv_sta; - kfree(rctrl); -} - -#ifdef CONFIG_MAC80211_DEBUGFS - -static int open_file_generic(struct inode *inode, struct file *file) -{ - file->private_data = inode->i_private; - return 0; -} - -static ssize_t sta_tx_avg_rate_sum_read(struct file *file, - char __user *userbuf, - size_t count, loff_t *ppos) -{ - struct sta_rate_control *srctrl = file->private_data; - char buf[20]; - - sprintf(buf, "%d\n", srctrl->tx_avg_rate_sum); - return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); -} - -static const struct file_operations sta_tx_avg_rate_sum_ops = { - .read = sta_tx_avg_rate_sum_read, - .open = open_file_generic, -}; - -static ssize_t sta_tx_avg_rate_num_read(struct file *file, - char __user *userbuf, - size_t count, loff_t *ppos) -{ - struct sta_rate_control *srctrl = file->private_data; - char buf[20]; - - sprintf(buf, "%d\n", srctrl->tx_avg_rate_num); - return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); -} - -static const struct file_operations sta_tx_avg_rate_num_ops = { - .read = sta_tx_avg_rate_num_read, - .open = open_file_generic, -}; - -static void rate_control_simple_add_sta_debugfs(void *priv, void *priv_sta, - struct dentry *dir) -{ - struct sta_rate_control *srctrl = priv_sta; - - srctrl->tx_avg_rate_num_dentry = - debugfs_create_file("rc_simple_sta_tx_avg_rate_num", 0400, - dir, srctrl, &sta_tx_avg_rate_num_ops); - srctrl->tx_avg_rate_sum_dentry = - debugfs_create_file("rc_simple_sta_tx_avg_rate_sum", 0400, - dir, srctrl, &sta_tx_avg_rate_sum_ops); -} - -static void rate_control_simple_remove_sta_debugfs(void *priv, void *priv_sta) -{ - struct sta_rate_control *srctrl = priv_sta; - - debugfs_remove(srctrl->tx_avg_rate_sum_dentry); - debugfs_remove(srctrl->tx_avg_rate_num_dentry); -} -#endif - -static struct rate_control_ops mac80211_rcsimple = { - .name = "simple", - .tx_status = rate_control_simple_tx_status, - .get_rate = rate_control_simple_get_rate, - .rate_init = rate_control_simple_rate_init, - .clear = rate_control_simple_clear, - .alloc = rate_control_simple_alloc, - .free = rate_control_simple_free, - .alloc_sta = rate_control_simple_alloc_sta, - .free_sta = rate_control_simple_free_sta, -#ifdef CONFIG_MAC80211_DEBUGFS - .add_sta_debugfs = rate_control_simple_add_sta_debugfs, - .remove_sta_debugfs = rate_control_simple_remove_sta_debugfs, -#endif -}; - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Simple rate control algorithm"); - -int __init rc80211_simple_init(void) -{ - return ieee80211_rate_control_register(&mac80211_rcsimple); -} - -void rc80211_simple_exit(void) -{ - ieee80211_rate_control_unregister(&mac80211_rcsimple); -} - -#ifdef CONFIG_MAC80211_RC_SIMPLE_MODULE -module_init(rc80211_simple_init); 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