litmus-rt.git - The LITMUS^RT kernel.

diff options

Diffstat (limited to 'kernel/audit.c')

-rw-r--r--

1 files changed, 22 insertions, 10 deletions


diff --git a/kernel/audit.c b/kernel/audit.c index 4414e93d8750..ce6d8ea3131e 100644 --- a/kernel/audit.c +++ b/kernel/audit.c
@@ -61,8 +61,11 @@
61		61
62	#include "audit.h"	62	#include "audit.h"
63		63
64	/* No auditing will take place until audit_initialized != 0.	64	/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED.
65	* (Initialization happens after skb_init is called.) */	65	* (Initialization happens after skb_init is called.) */
		66	#define AUDIT_DISABLED -1
		67	#define AUDIT_UNINITIALIZED 0
		68	#define AUDIT_INITIALIZED 1
66	static int audit_initialized;	69	static int audit_initialized;
67		70
68	#define AUDIT_OFF 0	71	#define AUDIT_OFF 0
@@ -965,6 +968,9 @@ static int __init audit_init(void)
965	{	968	{
966	int i;	969	int i;
967		970
		971	if (audit_initialized == AUDIT_DISABLED)
		972	return 0;
		973
968	printk(KERN_INFO "audit: initializing netlink socket (%s)\n",	974	printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
969	audit_default ? "enabled" : "disabled");	975	audit_default ? "enabled" : "disabled");
970	audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, 0,	976	audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, 0,
@@ -976,7 +982,7 @@ static int __init audit_init(void)
976		982
977	skb_queue_head_init(&audit_skb_queue);	983	skb_queue_head_init(&audit_skb_queue);
978	skb_queue_head_init(&audit_skb_hold_queue);	984	skb_queue_head_init(&audit_skb_hold_queue);
979	audit_initialized = 1;	985	audit_initialized = AUDIT_INITIALIZED;
980	audit_enabled = audit_default;	986	audit_enabled = audit_default;
981	audit_ever_enabled \|= !!audit_default;	987	audit_ever_enabled \|= !!audit_default;
982		988
@@ -999,13 +1005,21 @@ __initcall(audit_init);
999	static int __init audit_enable(char *str)	1005	static int __init audit_enable(char *str)
1000	{	1006	{
1001	audit_default = !!simple_strtol(str, NULL, 0);	1007	audit_default = !!simple_strtol(str, NULL, 0);
1002	printk(KERN_INFO "audit: %s%s\n",	1008	if (!audit_default)
1003	audit_default ? "enabled" : "disabled",	1009	audit_initialized = AUDIT_DISABLED;
1004	audit_initialized ? "" : " (after initialization)");	1010
1005	if (audit_initialized) {	1011	printk(KERN_INFO "audit: %s", audit_default ? "enabled" : "disabled");
		1012
		1013	if (audit_initialized == AUDIT_INITIALIZED) {
1006	audit_enabled = audit_default;	1014	audit_enabled = audit_default;
1007	audit_ever_enabled \|= !!audit_default;	1015	audit_ever_enabled \|= !!audit_default;
		1016	} else if (audit_initialized == AUDIT_UNINITIALIZED) {
		1017	printk(" (after initialization)");
		1018	} else {
		1019	printk(" (until reboot)");
1008	}	1020	}
		1021	printk("\n");
		1022
1009	return 1;	1023	return 1;
1010	}	1024	}
1011		1025
@@ -1107,9 +1121,7 @@ unsigned int audit_serial(void)
1107	static inline void audit_get_stamp(struct audit_context *ctx,	1121	static inline void audit_get_stamp(struct audit_context *ctx,
1108	struct timespec t, unsigned int serial)	1122	struct timespec t, unsigned int serial)
1109	{	1123	{
1110	if (ctx)	1124	if (!ctx \|\| !auditsc_get_stamp(ctx, t, serial)) {
1111	auditsc_get_stamp(ctx, t, serial);
1112	else {
1113	*t = CURRENT_TIME;	1125	*t = CURRENT_TIME;
1114	*serial = audit_serial();	1126	*serial = audit_serial();
1115	}	1127	}
@@ -1146,7 +1158,7 @@ struct audit_buffer audit_log_start(struct audit_context ctx, gfp_t gfp_mask,
1146	int reserve;	1158	int reserve;
1147	unsigned long timeout_start = jiffies;	1159	unsigned long timeout_start = jiffies;
1148		1160
1149	if (!audit_initialized)	1161	if (audit_initialized != AUDIT_INITIALIZED)
1150	return NULL;	1162	return NULL;
1151		1163
1152	if (unlikely(audit_filter_type(type)))	1164	if (unlikely(audit_filter_type(type)))

/* * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> * * 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. * * utilities for mac80211 */ #include <net/mac80211.h> #include <linux/netdevice.h> #include <linux/export.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/skbuff.h> #include <linux/etherdevice.h> #include <linux/if_arp.h> #include <linux/bitmap.h> #include <linux/crc32.h> #include <net/net_namespace.h> #include <net/cfg80211.h> #include <net/rtnetlink.h> #include "ieee80211_i.h" #include "driver-ops.h" #include "rate.h" #include "mesh.h" #include "wme.h" #include "led.h" #include "wep.h" /* privid for wiphys to determine whether they belong to us or not */ void *mac80211_wiphy_privid = &mac80211_wiphy_privid; struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) { struct ieee80211_local *local; BUG_ON(!wiphy); local = wiphy_priv(wiphy); return &local->hw; } EXPORT_SYMBOL(wiphy_to_ieee80211_hw); u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, enum nl80211_iftype type) { __le16 fc = hdr->frame_control; /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ if (len < 16) return NULL; if (ieee80211_is_data(fc)) { if (len < 24) /* drop incorrect hdr len (data) */ return NULL; if (ieee80211_has_a4(fc)) return NULL; if (ieee80211_has_tods(fc)) return hdr->addr1; if (ieee80211_has_fromds(fc)) return hdr->addr2; return hdr->addr3; } if (ieee80211_is_mgmt(fc)) { if (len < 24) /* drop incorrect hdr len (mgmt) */ return NULL; return hdr->addr3; } if (ieee80211_is_ctl(fc)) { if(ieee80211_is_pspoll(fc)) return hdr->addr1; if (ieee80211_is_back_req(fc)) { switch (type) { case NL80211_IFTYPE_STATION: return hdr->addr2; case NL80211_IFTYPE_AP: case NL80211_IFTYPE_AP_VLAN: return hdr->addr1; default: break; /* fall through to the return */ } } } return NULL; } void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) { struct sk_buff *skb; struct ieee80211_hdr *hdr; skb_queue_walk(&tx->skbs, skb) { hdr = (struct ieee80211_hdr *) skb->data; hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); } } int ieee80211_frame_duration(enum ieee80211_band band, size_t len, int rate, int erp, int short_preamble, int shift) { int dur; /* calculate duration (in microseconds, rounded up to next higher * integer if it includes a fractional microsecond) to send frame of * len bytes (does not include FCS) at the given rate. Duration will * also include SIFS. * * rate is in 100 kbps, so divident is multiplied by 10 in the * DIV_ROUND_UP() operations. * * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and * is assumed to be 0 otherwise. */ if (band == IEEE80211_BAND_5GHZ || erp) { /* * OFDM: * * N_DBPS = DATARATE x 4 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) * (16 = SIGNAL time, 6 = tail bits) * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext * * T_SYM = 4 usec * 802.11a - 18.5.2: aSIFSTime = 16 usec * 802.11g - 19.8.4: aSIFSTime = 10 usec + * signal ext = 6 usec */ dur = 16; /* SIFS + signal ext */ dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ /* IEEE 802.11-2012 18.3.2.4: all values above are: * * times 4 for 5 MHz * * times 2 for 10 MHz */ dur *= 1 << shift; /* rates should already consider the channel bandwidth, * don't apply divisor again. */ dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 4 * rate); /* T_SYM x N_SYM */ } else { /* * 802.11b or 802.11g with 802.11b compatibility: * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. * * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 * aSIFSTime = 10 usec * aPreambleLength = 144 usec or 72 usec with short preamble * aPLCPHeaderLength = 48 usec or 24 usec with short preamble */ dur = 10; /* aSIFSTime = 10 usec */ dur += short_preamble ? (72 + 24) : (144 + 48); dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); } return dur; } /* Exported duration function for driver use */ __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum ieee80211_band band, size_t frame_len, struct ieee80211_rate *rate) { struct ieee80211_sub_if_data *sdata; u16 dur; int erp, shift = 0; bool short_preamble = false; erp = 0; if (vif) { sdata = vif_to_sdata(vif); short_preamble = sdata->vif.bss_conf.use_short_preamble; if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) erp = rate->flags & IEEE80211_RATE_ERP_G; shift = ieee80211_vif_get_shift(vif); } dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, short_preamble, shift); return cpu_to_le16(dur); } EXPORT_SYMBOL(ieee80211_generic_frame_duration); __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, struct ieee80211_vif *vif, size_t frame_len, const struct ieee80211_tx_info *frame_txctl) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_rate *rate; struct ieee80211_sub_if_data *sdata; bool short_preamble; int erp, shift = 0, bitrate; u16 dur; struct ieee80211_supported_band *sband; sband = local->hw.wiphy->bands[frame_txctl->band]; short_preamble = false; rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; erp = 0; if (vif) { sdata = vif_to_sdata(vif); short_preamble = sdata->vif.bss_conf.use_short_preamble; if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) erp = rate->flags & IEEE80211_RATE_ERP_G; shift = ieee80211_vif_get_shift(vif); } bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); /* CTS duration */ dur = ieee80211_frame_duration(sband->band, 10, bitrate, erp, short_preamble, shift); /* Data frame duration */ dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, erp, short_preamble, shift); /* ACK duration */ dur += ieee80211_frame_duration(sband->band, 10, bitrate, erp, short_preamble, shift); return cpu_to_le16(dur); } EXPORT_SYMBOL(ieee80211_rts_duration); __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, struct ieee80211_vif *vif, size_t frame_len, const struct ieee80211_tx_info *frame_txctl) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_rate *rate; struct ieee80211_sub_if_data *sdata; bool short_preamble; int erp, shift = 0, bitrate; u16 dur; struct ieee80211_supported_band *sband; sband = local->hw.wiphy->bands[frame_txctl->band]; short_preamble = false; rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; erp = 0; if (vif) { sdata = vif_to_sdata(vif); short_preamble = sdata->vif.bss_conf.use_short_preamble; if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) erp = rate->flags & IEEE80211_RATE_ERP_G; shift = ieee80211_vif_get_shift(vif); } bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); /* Data frame duration */ dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, erp, short_preamble, shift); if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { /* ACK duration */ dur += ieee80211_frame_duration(sband->band, 10, bitrate, erp, short_preamble, shift); } return cpu_to_le16(dur); } EXPORT_SYMBOL(ieee80211_ctstoself_duration); void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) { struct ieee80211_sub_if_data *sdata; int n_acs = IEEE80211_NUM_ACS; if (local->hw.queues < IEEE80211_NUM_ACS) n_acs = 1; list_for_each_entry_rcu(sdata, &local->interfaces, list) { int ac; if (!sdata->dev) continue; if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) continue; if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && local->queue_stop_reasons[sdata->vif.cab_queue] != 0) continue; for (ac = 0; ac < n_acs; ac++) { int ac_queue = sdata->vif.hw_queue[ac]; if (ac_queue == queue || (sdata->vif.cab_queue == queue && local->queue_stop_reasons[ac_queue] == 0 && skb_queue_empty(&local->pending[ac_queue]))) netif_wake_subqueue(sdata->dev, ac); } } } static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, enum queue_stop_reason reason) { struct ieee80211_local *local = hw_to_local(hw); trace_wake_queue(local, queue, reason); if (WARN_ON(queue >= hw->queues)) return; if (!test_bit(reason, &local->queue_stop_reasons[queue])) return; __clear_bit(reason, &local->queue_stop_reasons[queue]); if (local->queue_stop_reasons[queue] != 0) /* someone still has this queue stopped */ return; if (skb_queue_empty(&local->pending[queue])) { rcu_read_lock(); ieee80211_propagate_queue_wake(local, queue); rcu_read_unlock(); } else tasklet_schedule(&local->tx_pending_tasklet); } void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, enum queue_stop_reason reason) { struct ieee80211_local *local = hw_to_local(hw); unsigned long flags; spin_lock_irqsave(&local->queue_stop_reason_lock, flags); __ieee80211_wake_queue(hw, queue, reason); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) { ieee80211_wake_queue_by_reason(hw, queue, IEEE80211_QUEUE_STOP_REASON_DRIVER); } EXPORT_SYMBOL(ieee80211_wake_queue); static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, enum queue_stop_reason reason) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata; int n_acs = IEEE80211_NUM_ACS; trace_stop_queue(local, queue, reason); if (WARN_ON(queue >= hw->queues)) return; if (test_bit(reason, &local->queue_stop_reasons[queue])) return; __set_bit(reason, &local->queue_stop_reasons[queue]); if (local->hw.queues < IEEE80211_NUM_ACS) n_acs = 1; rcu_read_lock(); list_for_each_entry_rcu(sdata, &local->interfaces, list) { int ac; if (!sdata->dev) continue; for (ac = 0; ac < n_acs; ac++) { if (sdata->vif.hw_queue[ac] == queue || sdata->vif.cab_queue == queue) netif_stop_subqueue(sdata->dev, ac); } } rcu_read_unlock(); } void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, enum queue_stop_reason reason) { struct ieee80211_local *local = hw_to_local(hw); unsigned long flags; spin_lock_irqsave(&local->queue_stop_reason_lock, flags); __ieee80211_stop_queue(hw, queue, reason); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) { ieee80211_stop_queue_by_reason(hw, queue, IEEE80211_QUEUE_STOP_REASON_DRIVER); } EXPORT_SYMBOL(ieee80211_stop_queue); void ieee80211_add_pending_skb(struct ieee80211_local *local, struct sk_buff *skb) { struct ieee80211_hw *hw = &local->hw; unsigned long flags; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int queue = info->hw_queue; if (WARN_ON(!info->control.vif)) { ieee80211_free_txskb(&local->hw, skb); return; } spin_lock_irqsave(&local->queue_stop_reason_lock, flags); __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); __skb_queue_tail(&local->pending[queue], skb); __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, struct sk_buff_head *skbs, void (*fn)(void *data), void *data) { struct ieee80211_hw *hw = &local->hw; struct sk_buff *skb; unsigned long flags; int queue, i; spin_lock_irqsave(&local->queue_stop_reason_lock, flags); while ((skb = skb_dequeue(skbs))) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); if (WARN_ON(!info->control.vif)) { ieee80211_free_txskb(&local->hw, skb); continue; } queue = info->hw_queue; __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); __skb_queue_tail(&local->pending[queue], skb); } if (fn) fn(data); for (i = 0; i < hw->queues; i++) __ieee80211_wake_queue(hw, i, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, unsigned long queues, enum queue_stop_reason reason) { struct ieee80211_local *local = hw_to_local(hw); unsigned long flags; int i; spin_lock_irqsave(&local->queue_stop_reason_lock, flags); for_each_set_bit(i, &queues, hw->queues) __ieee80211_stop_queue(hw, i, reason); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } void ieee80211_stop_queues(struct ieee80211_hw *hw) { ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_DRIVER); } EXPORT_SYMBOL(ieee80211_stop_queues); int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) { struct ieee80211_local *local = hw_to_local(hw); unsigned long flags; int ret; if (WARN_ON(queue >= hw->queues)) return true; spin_lock_irqsave(&local->queue_stop_reason_lock, flags); ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, &local->queue_stop_reasons[queue]); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); return ret; } EXPORT_SYMBOL(ieee80211_queue_stopped); void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, unsigned long queues, enum queue_stop_reason reason) { struct ieee80211_local *local = hw_to_local(hw); unsigned long flags; int i; spin_lock_irqsave(&local->queue_stop_reason_lock, flags); for_each_set_bit(i, &queues, hw->queues) __ieee80211_wake_queue(hw, i, reason); spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } void ieee80211_wake_queues(struct ieee80211_hw *hw) { ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_DRIVER); } EXPORT_SYMBOL(ieee80211_wake_queues); void ieee80211_flush_queues(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { u32 queues; if (!local->ops->flush) return; if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { int ac; queues = 0; for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) queues |= BIT(sdata->vif.hw_queue[ac]); if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) queues |= BIT(sdata->vif.cab_queue); } else { /* all queues */ queues = BIT(local->hw.queues) - 1; } ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_FLUSH); drv_flush(local, queues, false); ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_FLUSH); } void ieee80211_iterate_active_interfaces( struct ieee80211_hw *hw, u32 iter_flags, void (*iterator)(void *data, u8 *mac, struct ieee80211_vif *vif), void *data) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata; mutex_lock(&local->iflist_mtx); list_for_each_entry(sdata, &local->interfaces, list) { switch (sdata->vif.type) { case NL80211_IFTYPE_MONITOR: if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) continue; break; case NL80211_IFTYPE_AP_VLAN: continue; default: break; } if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) continue; if (ieee80211_sdata_running(sdata)) iterator(data, sdata->vif.addr, &sdata->vif); } sdata = rcu_dereference_protected(local->monitor_sdata, lockdep_is_held(&local->iflist_mtx)); if (sdata && (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || sdata->flags & IEEE80211_SDATA_IN_DRIVER)) iterator(data, sdata->vif.addr, &sdata->vif); mutex_unlock(&local->iflist_mtx); } EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); void ieee80211_iterate_active_interfaces_atomic( struct ieee80211_hw *hw, u32 iter_flags, void (*iterator)(void *data, u8 *mac, struct ieee80211_vif *vif), void *data) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata; rcu_read_lock(); list_for_each_entry_rcu(sdata, &local->interfaces, list) {


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