diff options
Diffstat (limited to 'net/mac80211')
-rw-r--r-- | net/mac80211/Kconfig | 13 | ||||
-rw-r--r-- | net/mac80211/agg-tx.c | 2 | ||||
-rw-r--r-- | net/mac80211/cfg.c | 19 | ||||
-rw-r--r-- | net/mac80211/debugfs_netdev.c | 8 | ||||
-rw-r--r-- | net/mac80211/ieee80211_i.h | 1 | ||||
-rw-r--r-- | net/mac80211/mesh.c | 259 | ||||
-rw-r--r-- | net/mac80211/mesh.h | 36 | ||||
-rw-r--r-- | net/mac80211/mesh_hwmp.c | 130 | ||||
-rw-r--r-- | net/mac80211/mesh_pathtbl.c | 305 | ||||
-rw-r--r-- | net/mac80211/mesh_plink.c | 241 | ||||
-rw-r--r-- | net/mac80211/mlme.c | 59 | ||||
-rw-r--r-- | net/mac80211/rx.c | 48 | ||||
-rw-r--r-- | net/mac80211/sta_info.c | 330 | ||||
-rw-r--r-- | net/mac80211/sta_info.h | 30 | ||||
-rw-r--r-- | net/mac80211/status.c | 18 | ||||
-rw-r--r-- | net/mac80211/tx.c | 14 |
16 files changed, 1148 insertions, 365 deletions
diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig index f5fdfcbf552..d1886b59bec 100644 --- a/net/mac80211/Kconfig +++ b/net/mac80211/Kconfig @@ -199,6 +199,19 @@ config MAC80211_VERBOSE_MPL_DEBUG Do not select this option. +config MAC80211_VERBOSE_MPATH_DEBUG + bool "Verbose mesh path debugging" + depends on MAC80211_DEBUG_MENU + depends on MAC80211_MESH + ---help--- + Selecting this option causes mac80211 to print out very + verbose mesh path selection debugging messages (when mac80211 + is taking part in a mesh network). + It should not be selected on production systems as those + messages are remotely triggerable. + + Do not select this option. + config MAC80211_VERBOSE_MHWMP_DEBUG bool "Verbose mesh HWMP routing debugging" depends on MAC80211_DEBUG_MENU diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index b7075f33dc0..018108d1a2f 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -128,7 +128,7 @@ void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u1 memcpy(bar->ta, sdata->vif.addr, ETH_ALEN); bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; - bar_control |= (u16)(tid << 12); + bar_control |= (u16)(tid << IEEE80211_BAR_CTRL_TID_INFO_SHIFT); bar->control = cpu_to_le16(bar_control); bar->start_seq_num = cpu_to_le16(ssn); diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index a589addf6ce..4baa03b1c25 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -697,6 +697,9 @@ static void sta_apply_parameters(struct ieee80211_local *local, } spin_unlock_irqrestore(&sta->flaglock, flags); + sta->sta.uapsd_queues = params->uapsd_queues; + sta->sta.max_sp = params->max_sp; + /* * cfg80211 validates this (1-2007) and allows setting the AID * only when creating a new station entry @@ -1137,6 +1140,22 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy, conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode; ieee80211_mesh_root_setup(ifmsh); } + if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) { + /* our current gate announcement implementation rides on root + * announcements, so require this ifmsh to also be a root node + * */ + if (nconf->dot11MeshGateAnnouncementProtocol && + !conf->dot11MeshHWMPRootMode) { + conf->dot11MeshHWMPRootMode = 1; + ieee80211_mesh_root_setup(ifmsh); + } + conf->dot11MeshGateAnnouncementProtocol = + nconf->dot11MeshGateAnnouncementProtocol; + } + if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask)) { + conf->dot11MeshHWMPRannInterval = + nconf->dot11MeshHWMPRannInterval; + } return 0; } diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index 9ea7c0d0103..6e8eab7919e 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -372,6 +372,10 @@ IEEE80211_IF_FILE(min_discovery_timeout, u.mesh.mshcfg.min_discovery_timeout, DEC); IEEE80211_IF_FILE(dot11MeshHWMPRootMode, u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC); +IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol, + u.mesh.mshcfg.dot11MeshGateAnnouncementProtocol, DEC); +IEEE80211_IF_FILE(dot11MeshHWMPRannInterval, + u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC); #endif @@ -485,7 +489,9 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata) MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries); MESHPARAMS_ADD(path_refresh_time); MESHPARAMS_ADD(min_discovery_timeout); - + MESHPARAMS_ADD(dot11MeshHWMPRootMode); + MESHPARAMS_ADD(dot11MeshHWMPRannInterval); + MESHPARAMS_ADD(dot11MeshGateAnnouncementProtocol); #undef MESHPARAMS_ADD } #endif diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index ea741905084..c204cee1189 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -514,6 +514,7 @@ struct ieee80211_if_mesh { struct mesh_config mshcfg; u32 mesh_seqnum; bool accepting_plinks; + int num_gates; const u8 *ie; u8 ie_len; enum { diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index 29e9980c8e6..28ab510e621 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -13,10 +13,6 @@ #include "ieee80211_i.h" #include "mesh.h" -#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) -#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) -#define IEEE80211_MESH_RANN_INTERVAL (1 * HZ) - #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 #define MESHCONF_CAPAB_FORWARDING 0x08 @@ -27,6 +23,17 @@ int mesh_allocated; static struct kmem_cache *rm_cache; +#ifdef CONFIG_MAC80211_MESH +bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) +{ + return (mgmt->u.action.u.mesh_action.action_code == + WLAN_MESH_ACTION_HWMP_PATH_SELECTION); +} +#else +bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) +{ return false; } +#endif + void ieee80211s_init(void) { mesh_pathtbl_init(); @@ -204,36 +211,185 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, return 0; } -void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) +int +mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; + u8 *pos, neighbors; + u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); + + if (skb_tailroom(skb) < 2 + meshconf_len) + return -ENOMEM; + + pos = skb_put(skb, 2 + meshconf_len); + *pos++ = WLAN_EID_MESH_CONFIG; + *pos++ = meshconf_len; + + /* Active path selection protocol ID */ + *pos++ = ifmsh->mesh_pp_id; + /* Active path selection metric ID */ + *pos++ = ifmsh->mesh_pm_id; + /* Congestion control mode identifier */ + *pos++ = ifmsh->mesh_cc_id; + /* Synchronization protocol identifier */ + *pos++ = ifmsh->mesh_sp_id; + /* Authentication Protocol identifier */ + *pos++ = ifmsh->mesh_auth_id; + /* Mesh Formation Info - number of neighbors */ + neighbors = atomic_read(&ifmsh->mshstats.estab_plinks); + /* Number of neighbor mesh STAs or 15 whichever is smaller */ + neighbors = (neighbors > 15) ? 15 : neighbors; + *pos++ = neighbors << 1; + /* Mesh capability */ + ifmsh->accepting_plinks = mesh_plink_availables(sdata); + *pos = MESHCONF_CAPAB_FORWARDING; + *pos++ |= ifmsh->accepting_plinks ? + MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; + *pos++ = 0x00; + + return 0; +} + +int +mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; + u8 *pos; + + if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) + return -ENOMEM; + + pos = skb_put(skb, 2 + ifmsh->mesh_id_len); + *pos++ = WLAN_EID_MESH_ID; + *pos++ = ifmsh->mesh_id_len; + if (ifmsh->mesh_id_len) + memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); + + return 0; +} + +int +mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; + u8 offset, len; + const u8 *data; + + if (!ifmsh->ie || !ifmsh->ie_len) + return 0; + + /* fast-forward to vendor IEs */ + offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); + + if (offset) { + len = ifmsh->ie_len - offset; + data = ifmsh->ie + offset; + if (skb_tailroom(skb) < len) + return -ENOMEM; + memcpy(skb_put(skb, len), data, len); + } + + return 0; +} + +int +mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; + u8 len = 0; + const u8 *data; + + if (!ifmsh->ie || !ifmsh->ie_len) + return 0; + + /* find RSN IE */ + data = ifmsh->ie; + while (data < ifmsh->ie + ifmsh->ie_len) { + if (*data == WLAN_EID_RSN) { + len = data[1] + 2; + break; + } + data++; + } + + if (len) { + if (skb_tailroom(skb) < len) + return -ENOMEM; + memcpy(skb_put(skb, len), data, len); + } + + return 0; +} + +int +mesh_add_srates_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_supported_band *sband; - u8 *pos; - int len, i, rate; - u8 neighbors; + int rate; + u8 i, rates, *pos; sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; - len = sband->n_bitrates; - if (len > 8) - len = 8; - pos = skb_put(skb, len + 2); + rates = sband->n_bitrates; + if (rates > 8) + rates = 8; + + if (skb_tailroom(skb) < rates + 2) + return -ENOMEM; + + pos = skb_put(skb, rates + 2); *pos++ = WLAN_EID_SUPP_RATES; - *pos++ = len; - for (i = 0; i < len; i++) { + *pos++ = rates; + for (i = 0; i < rates; i++) { rate = sband->bitrates[i].bitrate; *pos++ = (u8) (rate / 5); } - if (sband->n_bitrates > len) { - pos = skb_put(skb, sband->n_bitrates - len + 2); + return 0; +} + +int +mesh_add_ext_srates_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_supported_band *sband; + int rate; + u8 i, exrates, *pos; + + sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; + exrates = sband->n_bitrates; + if (exrates > 8) + exrates -= 8; + else + exrates = 0; + + if (skb_tailroom(skb) < exrates + 2) + return -ENOMEM; + + if (exrates) { + pos = skb_put(skb, exrates + 2); *pos++ = WLAN_EID_EXT_SUPP_RATES; - *pos++ = sband->n_bitrates - len; - for (i = len; i < sband->n_bitrates; i++) { + *pos++ = exrates; + for (i = 8; i < sband->n_bitrates; i++) { rate = sband->bitrates[i].bitrate; *pos++ = (u8) (rate / 5); } } + return 0; +} +int mesh_add_ds_params_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_supported_band *sband; + u8 *pos; + + if (skb_tailroom(skb) < 3) + return -ENOMEM; + + sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; if (sband->band == IEEE80211_BAND_2GHZ) { pos = skb_put(skb, 2 + 1); *pos++ = WLAN_EID_DS_PARAMS; @@ -241,53 +397,9 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); } - pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); - *pos++ = WLAN_EID_MESH_ID; - *pos++ = sdata->u.mesh.mesh_id_len; - if (sdata->u.mesh.mesh_id_len) - memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); - - pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie)); - *pos++ = WLAN_EID_MESH_CONFIG; - *pos++ = sizeof(struct ieee80211_meshconf_ie); - - /* Active path selection protocol ID */ - *pos++ = sdata->u.mesh.mesh_pp_id; - - /* Active path selection metric ID */ - *pos++ = sdata->u.mesh.mesh_pm_id; - - /* Congestion control mode identifier */ - *pos++ = sdata->u.mesh.mesh_cc_id; - - /* Synchronization protocol identifier */ - *pos++ = sdata->u.mesh.mesh_sp_id; - - /* Authentication Protocol identifier */ - *pos++ = sdata->u.mesh.mesh_auth_id; - - /* Mesh Formation Info - number of neighbors */ - neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks); - /* Number of neighbor mesh STAs or 15 whichever is smaller */ - neighbors = (neighbors > 15) ? 15 : neighbors; - *pos++ = neighbors << 1; - - /* Mesh capability */ - sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); - *pos = MESHCONF_CAPAB_FORWARDING; - *pos++ |= sdata->u.mesh.accepting_plinks ? - MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; - *pos++ = 0x00; - - if (sdata->u.mesh.ie) { - int len = sdata->u.mesh.ie_len; - const u8 *data = sdata->u.mesh.ie; - if (skb_tailroom(skb) > len) - memcpy(skb_put(skb, len), data, len); - } + return 0; } - static void ieee80211_mesh_path_timer(unsigned long data) { struct ieee80211_sub_if_data *sdata = @@ -425,7 +537,8 @@ static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) mesh_path_tx_root_frame(sdata); mod_timer(&ifmsh->mesh_path_root_timer, - round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL)); + round_jiffies(TU_TO_EXP_TIME( + ifmsh->mshcfg.dot11MeshHWMPRannInterval))); } #ifdef CONFIG_PM @@ -433,7 +546,7 @@ void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; - /* use atomic bitops in case both timers fire at the same time */ + /* use atomic bitops in case all timers fire at the same time */ if (del_timer_sync(&ifmsh->housekeeping_timer)) set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); @@ -557,11 +670,18 @@ static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, struct ieee80211_rx_status *rx_status) { switch (mgmt->u.action.category) { - case WLAN_CATEGORY_MESH_ACTION: - mesh_rx_plink_frame(sdata, mgmt, len, rx_status); + case WLAN_CATEGORY_SELF_PROTECTED: + switch (mgmt->u.action.u.self_prot.action_code) { + case WLAN_SP_MESH_PEERING_OPEN: + case WLAN_SP_MESH_PEERING_CLOSE: + case WLAN_SP_MESH_PEERING_CONFIRM: + mesh_rx_plink_frame(sdata, mgmt, len, rx_status); + break; + } break; - case WLAN_CATEGORY_MESH_PATH_SEL: - mesh_rx_path_sel_frame(sdata, mgmt, len); + case WLAN_CATEGORY_MESH_ACTION: + if (mesh_action_is_path_sel(mgmt)) + mesh_rx_path_sel_frame(sdata, mgmt, len); break; } } @@ -633,6 +753,7 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) ifmsh->accepting_plinks = true; ifmsh->preq_id = 0; ifmsh->sn = 0; + ifmsh->num_gates = 0; atomic_set(&ifmsh->mpaths, 0); mesh_rmc_init(sdata); ifmsh->last_preq = jiffies; diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index 249e733362e..20272072171 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -81,6 +81,7 @@ enum mesh_deferred_task_flags { * @discovery_retries: number of discovery retries * @flags: mesh path flags, as specified on &enum mesh_path_flags * @state_lock: mesh path state lock + * @is_gate: the destination station of this path is a mesh gate * * * The combination of dst and sdata is unique in the mesh path table. Since the @@ -104,6 +105,7 @@ struct mesh_path { u8 discovery_retries; enum mesh_path_flags flags; spinlock_t state_lock; + bool is_gate; }; /** @@ -120,6 +122,9 @@ struct mesh_path { * buckets * @mean_chain_len: maximum average length for the hash buckets' list, if it is * reached, the table will grow + * @known_gates: list of known mesh gates and their mpaths by the station. The + * gate's mpath may or may not be resolved and active. + * * rcu_head: RCU head to free the table */ struct mesh_table { @@ -133,6 +138,8 @@ struct mesh_table { int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl); int size_order; int mean_chain_len; + struct hlist_head *known_gates; + spinlock_t gates_lock; struct rcu_head rcu_head; }; @@ -166,6 +173,8 @@ struct mesh_rmc { u32 idx_mask; }; +#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) +#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) #define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */ @@ -177,14 +186,6 @@ struct mesh_rmc { /* Maximum number of paths per interface */ #define MESH_MAX_MPATHS 1024 -/* Pending ANA approval */ -#define MESH_PATH_SEL_ACTION 0 - -/* PERR reason codes */ -#define PEER_RCODE_UNSPECIFIED 11 -#define PERR_RCODE_NO_ROUTE 12 -#define PERR_RCODE_DEST_UNREACH 13 - /* Public interfaces */ /* Various */ int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, @@ -199,6 +200,20 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, void mesh_ids_set_default(struct ieee80211_if_mesh *mesh); void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata); +int mesh_add_meshconf_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); +int mesh_add_meshid_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); +int mesh_add_rsn_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); +int mesh_add_vendor_ies(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); +int mesh_add_srates_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); +int mesh_add_ext_srates_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); +int mesh_add_ds_params_ie(struct sk_buff *skb, + struct ieee80211_sub_if_data *sdata); void mesh_rmc_free(struct ieee80211_sub_if_data *sdata); int mesh_rmc_init(struct ieee80211_sub_if_data *sdata); void ieee80211s_init(void); @@ -227,6 +242,10 @@ void mesh_path_flush(struct ieee80211_sub_if_data *sdata); void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len); int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata); + +int mesh_path_add_gate(struct mesh_path *mpath); +int mesh_path_send_to_gates(struct mesh_path *mpath); +int mesh_gate_num(struct ieee80211_sub_if_data *sdata); /* Mesh plinks */ void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata, @@ -262,6 +281,7 @@ void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata); void mesh_path_restart(struct ieee80211_sub_if_data *sdata); void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata); +bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt); extern int mesh_paths_generation; #ifdef CONFIG_MAC80211_MESH diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index 3d8e55ae6ab..fd4f76a3e13 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -11,7 +11,8 @@ #include "mesh.h" #ifdef CONFIG_MAC80211_VERBOSE_MHWMP_DEBUG -#define mhwmp_dbg(fmt, args...) printk(KERN_DEBUG "Mesh HWMP: " fmt, ##args) +#define mhwmp_dbg(fmt, args...) \ + printk(KERN_DEBUG "Mesh HWMP (%s): " fmt "\n", sdata->name, ##args) #else #define mhwmp_dbg(fmt, args...) do { (void)(0); } while (0) #endif @@ -68,12 +69,12 @@ static inline u32 u16_field_get(u8 *preq_elem, int offset, bool ae) #define PREP_IE_FLAGS(x) PREQ_IE_FLAGS(x) #define PREP_IE_HOPCOUNT(x) PREQ_IE_HOPCOUNT(x) #define PREP_IE_TTL(x) PREQ_IE_TTL(x) -#define PREP_IE_ORIG_ADDR(x) (x + 3) -#define PREP_IE_ORIG_SN(x) u32_field_get(x, 9, 0) +#define PREP_IE_ORIG_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21) +#define PREP_IE_ORIG_SN(x) u32_field_get(x, 27, AE_F_SET(x)) #define PREP_IE_LIFETIME(x) u32_field_get(x, 13, AE_F_SET(x)) #define PREP_IE_METRIC(x) u32_field_get(x, 17, AE_F_SET(x)) -#define PREP_IE_TARGET_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21) -#define PREP_IE_TARGET_SN(x) u32_field_get(x, 27, AE_F_SET(x)) +#define PREP_IE_TARGET_ADDR(x) (x + 3) +#define PREP_IE_TARGET_SN(x) u32_field_get(x, 9, 0) #define PERR_IE_TTL(x) (*(x)) #define PERR_IE_TARGET_FLAGS(x) (*(x + 2)) @@ -132,24 +133,25 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags, memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); /* BSSID == SA */ memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); - mgmt->u.action.category = WLAN_CATEGORY_MESH_PATH_SEL; - mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION; + mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION; + mgmt->u.action.u.mesh_action.action_code = + WLAN_MESH_ACTION_HWMP_PATH_SELECTION; switch (action) { case MPATH_PREQ: - mhwmp_dbg("sending PREQ to %pM\n", target); + mhwmp_dbg("sending PREQ to %pM", target); ie_len = 37; pos = skb_put(skb, 2 + ie_len); *pos++ = WLAN_EID_PREQ; break; case MPATH_PREP: - mhwmp_dbg("sending PREP to %pM\n", target); + mhwmp_dbg("sending PREP to %pM", target); ie_len = 31; pos = skb_put(skb, 2 + ie_len); *pos++ = WLAN_EID_PREP; break; case MPATH_RANN: - mhwmp_dbg("sending RANN from %pM\n", orig_addr); + mhwmp_dbg("sending RANN from %pM", orig_addr); ie_len = sizeof(struct ieee80211_rann_ie); pos = skb_put(skb, 2 + ie_len); *pos++ = WLAN_EID_RANN; @@ -163,29 +165,37 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags, *pos++ = flags; *pos++ = hop_count; *pos++ = ttl; - if (action == MPATH_PREQ) { - memcpy(pos, &preq_id, 4); + if (action == MPATH_PREP) { + memcpy(pos, target, ETH_ALEN); + pos += ETH_ALEN; + memcpy(pos, &target_sn, 4); pos += 4; - } - memcpy(pos, orig_addr, ETH_ALEN); - pos += ETH_ALEN; - memcpy(pos, &orig_sn, 4); - pos += 4; - if (action != MPATH_RANN) { - memcpy(pos, &lifetime, 4); + } else { + if (action == MPATH_PREQ) { + memcpy(pos, &preq_id, 4); + pos += 4; + } + memcpy(pos, orig_addr, ETH_ALEN); + pos += ETH_ALEN; + memcpy(pos, &orig_sn, 4); pos += 4; } + memcpy(pos, &lifetime, 4); /* interval for RANN */ + pos += 4; memcpy(pos, &metric, 4); pos += 4; if (action == MPATH_PREQ) { - /* destination count */ - *pos++ = 1; + *pos++ = 1; /* destination count */ *pos++ = target_flags; - } - if (action != MPATH_RANN) { memcpy(pos, target, ETH_ALEN); pos += ETH_ALEN; memcpy(pos, &target_sn, 4); + pos += 4; + } else if (action == MPATH_PREP) { + memcpy(pos, orig_addr, ETH_ALEN); + pos += ETH_ALEN; + memcpy(pos, &orig_sn, 4); + pos += 4; } ieee80211_tx_skb(sdata, skb); @@ -224,9 +234,11 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, memcpy(mgmt->da, ra, ETH_ALEN); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); - /* BSSID is left zeroed, wildcard value */ - mgmt->u.action.category = WLAN_CATEGORY_MESH_PATH_SEL; - mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION; + /* BSSID == SA */ + memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); + mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION; + mgmt->u.action.u.mesh_action.action_code = + WLAN_MESH_ACTION_HWMP_PATH_SELECTION; ie_len = 15; pos = skb_put(skb, 2 + ie_len); *pos++ = WLAN_EID_PERR; @@ -483,10 +495,10 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, orig_sn = PREQ_IE_ORIG_SN(preq_elem); target_flags = PREQ_IE_TARGET_F(preq_elem); - mhwmp_dbg("received PREQ from %pM\n", orig_addr); + mhwmp_dbg("received PREQ from %pM", orig_addr); if (memcmp(target_addr, sdata->vif.addr, ETH_ALEN) == 0) { - mhwmp_dbg("PREQ is for us\n"); + mhwmp_dbg("PREQ is for us"); forward = false; reply = true; metric = 0; @@ -522,7 +534,7 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, lifetime = PREQ_IE_LIFETIME(preq_elem); ttl = ifmsh->mshcfg.element_ttl; if (ttl != 0) { - mhwmp_dbg("replying to the PREQ\n"); + mhwmp_dbg("replying to the PREQ"); mesh_path_sel_frame_tx(MPATH_PREP, 0, target_addr, cpu_to_le32(target_sn), 0, orig_addr, cpu_to_le32(orig_sn), mgmt->sa, 0, ttl, @@ -542,7 +554,7 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, ifmsh->mshstats.dropped_frames_ttl++; return; } - mhwmp_dbg("forwarding the PREQ from %pM\n", orig_addr); + mhwmp_dbg("forwarding the PREQ from %pM", orig_addr); --ttl; flags = PREQ_IE_FLAGS(preq_elem); preq_id = PREQ_IE_PREQ_ID(preq_elem); @@ -577,7 +589,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata, u8 next_hop[ETH_ALEN]; u32 target_sn, orig_sn, lifetime; - mhwmp_dbg("received PREP from %pM\n", PREP_IE_ORIG_ADDR(prep_elem)); + mhwmp_dbg("received PREP from %pM", PREP_IE_ORIG_ADDR(prep_elem)); /* Note that we divert from the draft nomenclature and denominate * destination to what the draft refers to as origininator. So in this @@ -683,6 +695,8 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, u8 ttl, flags, hopcount; u8 *orig_addr; u32 orig_sn, metric; + u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; + bool root_is_gate; ttl = rann->rann_ttl; if (ttl <= 1) { @@ -691,12 +705,19 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, } ttl--; flags = rann->rann_flags; + root_is_gate = !!(flags & RANN_FLAG_IS_GATE); orig_addr = rann->rann_addr; orig_sn = rann->rann_seq; hopcount = rann->rann_hopcount; hopcount++; metric = rann->rann_metric; - mhwmp_dbg("received RANN from %pM\n", orig_addr); + + /* Ignore our own RANNs */ + if (memcmp(orig_addr, sdata->vif.addr, ETH_ALEN) == 0) + return; + + mhwmp_dbg("received RANN from %pM (is_gate=%d)", orig_addr, + root_is_gate); rcu_read_lock(); mpath = mesh_path_lookup(orig_addr, sdata); @@ -708,18 +729,28 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, sdata->u.mesh.mshstats.dropped_frames_no_route++; return; } - mesh_queue_preq(mpath, - PREQ_Q_F_START | PREQ_Q_F_REFRESH); } + + if ((!(mpath->flags & (MESH_PATH_ACTIVE | MESH_PATH_RESOLVING)) || + time_after(jiffies, mpath->exp_time - 1*HZ)) && + !(mpath->flags & MESH_PATH_FIXED)) { + mhwmp_dbg("%s time to refresh root mpath %pM", sdata->name, + orig_addr); + mesh_queue_preq(mpath, PREQ_Q_F_START | PREQ_Q_F_REFRESH); + } + if (mpath->sn < orig_sn) { mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr, cpu_to_le32(orig_sn), 0, NULL, 0, broadcast_addr, - hopcount, ttl, 0, + hopcount, ttl, cpu_to_le32(interval), cpu_to_le32(metric + mpath->metric), 0, sdata); mpath->sn = orig_sn; } + if (root_is_gate) + mesh_path_add_gate(mpath); + rcu_read_unlock(); } @@ -787,7 +818,7 @@ static void mesh_queue_preq(struct mesh_path *mpath, u8 flags) preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC); if (!preq_node) { - mhwmp_dbg("could not allocate PREQ node\n"); + mhwmp_dbg("could not allocate PREQ node"); return; } @@ -796,7 +827,7 @@ static void mesh_queue_preq(struct mesh_path *mpath, u8 flags) spin_unlock_bh(&ifmsh->mesh_preq_queue_lock); kfree(preq_node); if (printk_ratelimit()) - mhwmp_dbg("PREQ node queue full\n"); + mhwmp_dbg("PREQ node queue full"); return; } @@ -981,35 +1012,46 @@ void mesh_path_timer(unsigned long data) { struct mesh_path *mpath = (void *) data; struct ieee80211_sub_if_data *sdata = mpath->sdata; + int ret; if (sdata->local->quiescing) return; spin_lock_bh(&mpath->state_lock); if (mpath->flags & MESH_PATH_RESOLVED || - (!(mpath->flags & MESH_PATH_RESOLVING))) + (!(mpath->flags & MESH_PATH_RESOLVING))) { mpath->flags &= ~(MESH_PATH_RESOLVING | MESH_PATH_RESOLVED); - else if (mpath->discovery_retries < max_preq_retries(sdata)) { + spin_unlock_bh(&mpath->state_lock); + } else if (mpath->discovery_retries < max_preq_retries(sdata)) { ++mpath->discovery_retries; mpath->discovery_timeout *= 2; + spin_unlock_bh(&mpath->state_lock); mesh_queue_preq(mpath, 0); } else { mpath->flags = 0; mpath->exp_time = jiffies; - mesh_path_flush_pending(mpath); + spin_unlock_bh(&mpath->state_lock); + if (!mpath->is_gate && mesh_gate_num(sdata) > 0) { + ret = mesh_path_send_to_gates(mpath); + if (ret) + mhwmp_dbg("no gate was reachable"); + } else + mesh_path_flush_pending(mpath); } - - spin_unlock_bh(&mpath->state_lock); } void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; + u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; + u8 flags; - mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->vif.addr, + flags = (ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol) + ? RANN_FLAG_IS_GATE : 0; + mesh_path_sel_frame_tx(MPATH_RANN, flags, sdata->vif.addr, cpu_to_le32(++ifmsh->sn), 0, NULL, 0, broadcast_addr, 0, sdata->u.mesh.mshcfg.element_ttl, - 0, 0, 0, sdata); + cpu_to_le32(interval), 0, 0, sdata); } diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index dc7ae8d31aa..7fde32159fd 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -17,6 +17,12 @@ #include "ieee80211_i.h" #include "mesh.h" +#ifdef CONFIG_MAC80211_VERBOSE_MPATH_DEBUG +#define mpath_dbg(fmt, args...) printk(KERN_DEBUG fmt, ##args) +#else +#define mpath_dbg(fmt, args...) do { (void)(0); } while (0) +#endif + /* There will be initially 2^INIT_PATHS_SIZE_ORDER buckets */ #define INIT_PATHS_SIZE_ORDER 2 @@ -60,6 +66,8 @@ static inline struct mesh_table *resize_dereference_mpp_paths(void) lockdep_is_held(&pathtbl_resize_lock)); } +static int mesh_gate_add(struct mesh_table *tbl, struct mesh_path *mpath); + /* * CAREFUL -- "tbl" must not be an expression, * in particular not an rcu_dereference(), since @@ -103,6 +111,7 @@ static struct mesh_table *mesh_table_alloc(int size_order) sizeof(newtbl->hash_rnd)); for (i = 0; i <= newtbl->hash_mask; i++) spin_lock_init(&newtbl->hashwlock[i]); + spin_lock_init(&newtbl->gates_lock); return newtbl; } @@ -118,6 +127,7 @@ static void mesh_table_free(struct mesh_table *tbl, bool free_leafs) { struct hlist_head *mesh_hash; struct hlist_node *p, *q; + struct mpath_node *gate; int i; mesh_hash = tbl->hash_buckets; @@ -129,6 +139,17 @@ static void mesh_table_free(struct mesh_table *tbl, bool free_leafs) } spin_unlock_bh(&tbl->hashwlock[i]); } + if (free_leafs) { + spin_lock_bh(&tbl->gates_lock); + hlist_for_each_entry_safe(gate, p, q, + tbl->known_gates, list) { + hlist_del(&gate->list); + kfree(gate); + } + kfree(tbl->known_gates); + spin_unlock_bh(&tbl->gates_lock); + } + __mesh_table_free(tbl); } @@ -146,6 +167,7 @@ static int mesh_table_grow(struct mesh_table *oldtbl, newtbl->free_node = oldtbl->free_node; newtbl->mean_chain_len = oldtbl->mean_chain_len; newtbl->copy_node = oldtbl->copy_node; + newtbl->known_gates = oldtbl->known_gates; atomic_set(&newtbl->entries, atomic_read(&oldtbl->entries)); oldhash = oldtbl->hash_buckets; @@ -205,6 +227,111 @@ void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta) spin_unlock_irqrestore(&mpath->frame_queue.lock, flags); } +static void prepare_for_gate(struct sk_buff *skb, char *dst_addr, + struct mesh_path *gate_mpath) +{ + struct ieee80211_hdr *hdr; + struct ieee80211s_hdr *mshdr; + int mesh_hdrlen, hdrlen; + char *next_hop; + + hdr = (struct ieee80211_hdr *) skb->data; + hdrlen = ieee80211_hdrlen(hdr->frame_control); + mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); + + if (!(mshdr->flags & MESH_FLAGS_AE)) { + /* size of the fixed part of the mesh header */ + mesh_hdrlen = 6; + + /* make room for the two extended addresses */ + skb_push(skb, 2 * ETH_ALEN); + memmove(skb->data, hdr, hdrlen + mesh_hdrlen); + + hdr = (struct ieee80211_hdr *) skb->data; + + /* we preserve the previous mesh header and only add + * the new addreses */ + mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); + mshdr->flags = MESH_FLAGS_AE_A5_A6; + memcpy(mshdr->eaddr1, hdr->addr3, ETH_ALEN); + memcpy(mshdr->eaddr2, hdr->addr4, ETH_ALEN); + } + + /* update next hop */ + hdr = (struct ieee80211_hdr *) skb->data; + rcu_read_lock(); + next_hop = rcu_dereference(gate_mpath->next_hop)->sta.addr; + memcpy(hdr->addr1, next_hop, ETH_ALEN); + rcu_read_unlock(); + memcpy(hdr->addr3, dst_addr, ETH_ALEN); +} + +/** + * + * mesh_path_move_to_queue - Move or copy frames from one mpath queue to another + * + * This function is used to transfer or copy frames from an unresolved mpath to + * a gate mpath. The function also adds the Address Extension field and + * updates the next hop. + * + * If a frame already has an Address Extension field, only the next hop and + * destination addresses are updated. + * + * The gate mpath must be an active mpath with a valid mpath->next_hop. + * + * @mpath: An active mpath the frames will be sent to (i.e. the gate) + * @from_mpath: The failed mpath + * @copy: When true, copy all the frames to the new mpath queue. When false, + * move them. + */ +static void mesh_path_move_to_queue(struct mesh_path *gate_mpath, + struct mesh_path *from_mpath, + bool copy) +{ + struct sk_buff *skb, *cp_skb = NULL; + struct sk_buff_head gateq, failq; + unsigned long flags; + int num_skbs; + + BUG_ON(gate_mpath == from_mpath); + BUG_ON(!gate_mpath->next_hop); + + __skb_queue_head_init(&gateq); + __skb_queue_head_init(&failq); + + spin_lock_irqsave(&from_mpath->frame_queue.lock, flags); + skb_queue_splice_init(&from_mpath->frame_queue, &failq); + spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags); + + num_skbs = skb_queue_len(&failq); + + while (num_skbs--) { + skb = __skb_dequeue(&failq); + if (copy) + cp_skb = skb_copy(skb, GFP_ATOMIC); + + prepare_for_gate(skb, gate_mpath->dst, gate_mpath); + __skb_queue_tail(&gateq, skb); + + if (copy && cp_skb) + __skb_queue_tail(&failq, cp_skb); + } + + spin_lock_irqsave(&gate_mpath->frame_queue.lock, flags); + skb_queue_splice(&gateq, &gate_mpath->frame_queue); + mpath_dbg("Mpath queue for gate %pM has %d frames\n", + gate_mpath->dst, + skb_queue_len(&gate_mpath->frame_queue)); + spin_unlock_irqrestore(&gate_mpath->frame_queue.lock, flags); + + if (!copy) + return; + + spin_lock_irqsave(&from_mpath->frame_queue.lock, flags); + skb_queue_splice(&failq, &from_mpath->frame_queue); + spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags); +} + /** * mesh_path_lookup - look up a path in the mesh path table @@ -304,6 +431,109 @@ struct mesh_path *mesh_path_lookup_by_idx(int idx, struct ieee80211_sub_if_data return NULL; } +static void mesh_gate_node_reclaim(struct rcu_head *rp) +{ + struct mpath_node *node = container_of(rp, struct mpath_node, rcu); + kfree(node); +} + +/** + * mesh_gate_add - mark mpath as path to a mesh gate and add to known_gates + * @mesh_tbl: table which contains known_gates list + * @mpath: mpath to known mesh gate + * + * Returns: 0 on success + * + */ +static int mesh_gate_add(struct mesh_table *tbl, struct mesh_path *mpath) +{ + struct mpath_node *gate, *new_gate; + struct hlist_node *n; + int err; + + rcu_read_lock(); + tbl = rcu_dereference(tbl); + + hlist_for_each_entry_rcu(gate, n, tbl->known_gates, list) + if (gate->mpath == mpath) { + err = -EEXIST; + goto err_rcu; + } + + new_gate = kzalloc(sizeof(struct mpath_node), GFP_ATOMIC); + if (!new_gate) { + err = -ENOMEM; + goto err_rcu; + } + + mpath->is_gate = true; + mpath->sdata->u.mesh.num_gates++; + new_gate->mpath = mpath; + spin_lock_bh(&tbl->gates_lock); + hlist_add_head_rcu(&new_gate->list, tbl->known_gates); + spin_unlock_bh(&tbl->gates_lock); + rcu_read_unlock(); + mpath_dbg("Mesh path (%s): Recorded new gate: %pM. %d known gates\n", + mpath->sdata->name, mpath->dst, + mpath->sdata->u.mesh.num_gates); + return 0; +err_rcu: + rcu_read_unlock(); + return err; +} + +/** + * mesh_gate_del - remove a mesh gate from the list of known gates + * @tbl: table which holds our list of known gates + * @mpath: gate mpath + * + * Returns: 0 on success + * + * Locking: must be called inside rcu_read_lock() section + */ +static int mesh_gate_del(struct mesh_table *tbl, struct mesh_path *mpath) +{ + struct mpath_node *gate; + struct hlist_node *p, *q; + + tbl = rcu_dereference(tbl); + + hlist_for_each_entry_safe(gate, p, q, tbl->known_gates, list) + if (gate->mpath == mpath) { + spin_lock_bh(&tbl->gates_lock); + hlist_del_rcu(&gate->list); + call_rcu(&gate->rcu, mesh_gate_node_reclaim); + spin_unlock_bh(&tbl->gates_lock); + mpath->sdata->u.mesh.num_gates--; + mpath->is_gate = false; + mpath_dbg("Mesh path (%s): Deleted gate: %pM. " + "%d known gates\n", mpath->sdata->name, + mpath->dst, mpath->sdata->u.mesh.num_gates); + break; + } + + return 0; +} + +/** + * + * mesh_path_add_gate - add the given mpath to a mesh gate to our path table + * @mpath: gate path to add to table + */ +int mesh_path_add_gate(struct mesh_path *mpath) +{ + return mesh_gate_add(mesh_paths, mpath); +} + +/** + * mesh_gate_num - number of gates known to this interface + * @sdata: subif data + */ +int mesh_gate_num(struct ieee80211_sub_if_data *sdata) +{ + return sdata->u.mesh.num_gates; +} + /** * mesh_path_add - allocate and add a new path to the mesh path table * @addr: destination address of the path (ETH_ALEN length) @@ -481,6 +711,7 @@ int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata) new_mpath->flags = 0; skb_queue_head_init(&new_mpath->frame_queue); new_node->mpath = new_mpath; + init_timer(&new_mpath->timer); new_mpath->exp_time = jiffies; spin_lock_init(&new_mpath->state_lock); @@ -539,6 +770,7 @@ void mesh_plink_broken(struct sta_info *sta) struct hlist_node *p; struct ieee80211_sub_if_data *sdata = sta->sdata; int i; + __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_DEST_UNREACHABLE); rcu_read_lock(); tbl = rcu_dereference(mesh_paths); @@ -553,8 +785,7 @@ void mesh_plink_broken(struct sta_info *sta) spin_unlock_bh(&mpath->state_lock); mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl, mpath->dst, cpu_to_le32(mpath->sn), - cpu_to_le16(PERR_RCODE_DEST_UNREACH), - bcast, sdata); + reason, bcast, sdata); } else spin_unlock_bh(&mpath->state_lock); } @@ -647,12 +878,14 @@ int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata) mpath = node->mpath; if (mpath->sdata == sdata && memcmp(addr, mpath->dst, ETH_ALEN) == 0) { - spin_lock(&mpath->state_lock); + spin_lock_bh(&mpath->state_lock); + if (mpath->is_gate) + mesh_gate_del(tbl, mpath); mpath->flags |= MESH_PATH_RESOLVING; hlist_del_rcu(&node->list); call_rcu(&node->rcu, mesh_path_node_reclaim); atomic_dec(&tbl->entries); - spin_unlock(&mpath->state_lock); + spin_unlock_bh(&mpath->state_lock); goto enddel; } } @@ -681,6 +914,58 @@ void mesh_path_tx_pending(struct mesh_path *mpath) } /** + * mesh_path_send_to_gates - sends pending frames to all known mesh gates + * + * @mpath: mesh path whose queue will be emptied + * + * If there is only one gate, the frames are transferred from the failed mpath + * queue to that gate's queue. If there are more than one gates, the frames + * are copied from each gate to the next. After frames are copied, the + * mpath queues are emptied onto the transmission queue. + */ +int mesh_path_send_to_gates(struct mesh_path *mpath) +{ + struct ieee80211_sub_if_data *sdata = mpath->sdata; + struct hlist_node *n; + struct mesh_table *tbl; + struct mesh_path *from_mpath = mpath; + struct mpath_node *gate = NULL; + bool copy = false; + struct hlist_head *known_gates; + + rcu_read_lock(); + tbl = rcu_dereference(mesh_paths); + known_gates = tbl->known_gates; + rcu_read_unlock(); + + if (!known_gates) + return -EHOSTUNREACH; + + hlist_for_each_entry_rcu(gate, n, known_gates, list) { + if (gate->mpath->sdata != sdata) + continue; + + if (gate->mpath->flags & MESH_PATH_ACTIVE) { + mpath_dbg("Forwarding to %pM\n", gate->mpath->dst); + mesh_path_move_to_queue(gate->mpath, from_mpath, copy); + from_mpath = gate->mpath; + copy = true; + } else { + mpath_dbg("Not forwarding %p\n", gate->mpath); + mpath_dbg("flags %x\n", gate->mpath->flags); + } + } + + hlist_for_each_entry_rcu(gate, n, known_gates, list) + if (gate->mpath->sdata == sdata) { + mpath_dbg("Sending to %pM\n", gate->mpath->dst); + mesh_path_tx_pending(gate->mpath); + } + + return (from_mpath == mpath) ? -EHOSTUNREACH : 0; +} + +/** * mesh_path_discard_frame - discard a frame whose path could not be resolved * * @skb: frame to discard @@ -699,6 +984,7 @@ void mesh_path_discard_frame(struct sk_buff *skb, struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; struct mesh_path *mpath; u32 sn = 0; + __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD); if (memcmp(hdr->addr4, sdata->vif.addr, ETH_ALEN) != 0) { u8 *ra, *da; @@ -709,8 +995,7 @@ void mesh_path_discard_frame(struct sk_buff *skb, if (mpath) sn = ++mpath->sn; mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl, skb->data, - cpu_to_le32(sn), - cpu_to_le16(PERR_RCODE_NO_ROUTE), ra, sdata); + cpu_to_le32(sn), reason, ra, sdata); } kfree_skb(skb); @@ -728,8 +1013,7 @@ void mesh_path_flush_pending(struct mesh_path *mpath) { struct sk_buff *skb; - while ((skb = skb_dequeue(&mpath->frame_queue)) && - (mpath->flags & MESH_PATH_ACTIVE)) + while ((skb = skb_dequeue(&mpath->frame_queue)) != NULL) mesh_path_discard_frame(skb, mpath->sdata); } @@ -797,6 +1081,9 @@ int mesh_pathtbl_init(void) tbl_path->free_node = &mesh_path_node_free; tbl_path->copy_node = &mesh_path_node_copy; tbl_path->mean_chain_len = MEAN_CHAIN_LEN; + tbl_path->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC); + INIT_HLIST_HEAD(tbl_path->known_gates); + tbl_mpp = mesh_table_alloc(INIT_PATHS_SIZE_ORDER); if (!tbl_mpp) { @@ -806,6 +1093,8 @@ int mesh_pathtbl_init(void) tbl_mpp->free_node = &mesh_path_node_free; tbl_mpp->copy_node = &mesh_path_node_copy; tbl_mpp->mean_chain_len = MEAN_CHAIN_LEN; + tbl_mpp->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC); + INIT_HLIST_HEAD(tbl_mpp->known_gates); /* Need no locking since this is during init */ RCU_INIT_POINTER(mesh_paths, tbl_path); diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index f4adc091788..1a00d0f701c 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -19,35 +19,18 @@ #define mpl_dbg(fmt, args...) do { (void)(0); } while (0) #endif -#define PLINK_GET_LLID(p) (p + 4) -#define PLINK_GET_PLID(p) (p + 6) +#define PLINK_GET_LLID(p) (p + 2) +#define PLINK_GET_PLID(p) (p + 4) #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \ jiffies + HZ * t / 1000)) -/* Peer link cancel reasons, all subject to ANA approval */ -#define MESH_LINK_CANCELLED 2 -#define MESH_MAX_NEIGHBORS 3 -#define MESH_CAPABILITY_POLICY_VIOLATION 4 -#define MESH_CLOSE_RCVD 5 -#define MESH_MAX_RETRIES 6 -#define MESH_CONFIRM_TIMEOUT 7 -#define MESH_SECURITY_ROLE_NEGOTIATION_DIFFERS 8 -#define MESH_SECURITY_AUTHENTICATION_IMPOSSIBLE 9 -#define MESH_SECURITY_FAILED_VERIFICATION 10 - #define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries) #define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout) #define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout) #define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout) #define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks) -enum plink_frame_type { - PLINK_OPEN = 1, - PLINK_CONFIRM, - PLINK_CLOSE -}; - enum plink_event { PLINK_UNDEFINED, OPN_ACPT, @@ -157,16 +140,16 @@ void mesh_plink_deactivate(struct sta_info *sta) } static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, - enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid, - __le16 reason) { + enum ieee80211_self_protected_actioncode action, + u8 *da, __le16 llid, __le16 plid, __le16 reason) { struct ieee80211_local *local = sdata->local; struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 + sdata->u.mesh.ie_len); struct ieee80211_mgmt *mgmt; bool include_plid = false; - static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A }; + int ie_len = 4; + u16 peering_proto = 0; u8 *pos; - int ie_len; if (!skb) return -1; @@ -175,63 +158,75 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, * common action part (1) */ mgmt = (struct ieee80211_mgmt *) - skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action)); - memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action)); + skb_put(skb, 25 + sizeof(mgmt->u.action.u.self_prot)); + memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.self_prot)); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION); memcpy(mgmt->da, da, ETH_ALEN); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); - mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION; - mgmt->u.action.u.plink_action.action_code = action; - - if (action == PLINK_CLOSE) - mgmt->u.action.u.plink_action.aux = reason; - else { - mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0); - if (action == PLINK_CONFIRM) { - pos = skb_put(skb, 4); - /* two-byte status code followed by two-byte AID */ - memset(pos, 0, 2); + mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED; + mgmt->u.action.u.self_prot.action_code = action; + + if (action != WLAN_SP_MESH_PEERING_CLOSE) { + /* capability info */ + pos = skb_put(skb, 2); + memset(pos, 0, 2); + if (action == WLAN_SP_MESH_PEERING_CONFIRM) { + /* AID */ + pos = skb_put(skb, 2); memcpy(pos + 2, &plid, 2); } - mesh_mgmt_ies_add(skb, sdata); + if (mesh_add_srates_ie(skb, sdata) || + mesh_add_ext_srates_ie(skb, sdata) || + mesh_add_rsn_ie(skb, sdata) || + mesh_add_meshid_ie(skb, sdata) || + mesh_add_meshconf_ie(skb, sdata)) + return -1; + } else { /* WLAN_SP_MESH_PEERING_CLOSE */ + if (mesh_add_meshid_ie(skb, sdata)) + return -1; } - /* Add Peer Link Management element */ + /* Add Mesh Peering Management element */ switch (action) { - case PLINK_OPEN: - ie_len = 6; + case WLAN_SP_MESH_PEERING_OPEN: break; - case PLINK_CONFIRM: - ie_len = 8; + case WLAN_SP_MESH_PEERING_CONFIRM: + ie_len += 2; include_plid = true; break; - case PLINK_CLOSE: - default: - if (!plid) - ie_len = 8; - else { - ie_len = 10; + case WLAN_SP_MESH_PEERING_CLOSE: + if (plid) { + ie_len += 2; include_plid = true; } + ie_len += 2; /* reason code */ break; + default: + return -EINVAL; } + if (WARN_ON(skb_tailroom(skb) < 2 + ie_len)) + return -ENOMEM; + pos = skb_put(skb, 2 + ie_len); - *pos++ = WLAN_EID_PEER_LINK; + *pos++ = WLAN_EID_PEER_MGMT; *pos++ = ie_len; - memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto)); - pos += 4; + memcpy(pos, &peering_proto, 2); + pos += 2; memcpy(pos, &llid, 2); + pos += 2; if (include_plid) { - pos += 2; memcpy(pos, &plid, 2); - } - if (action == PLINK_CLOSE) { pos += 2; + } + if (action == WLAN_SP_MESH_PEERING_CLOSE) { memcpy(pos, &reason, 2); + pos += 2; } + if (mesh_add_vendor_ies(skb, sdata)) + return -1; ieee80211_tx_skb(sdata, skb); return 0; @@ -322,21 +317,21 @@ static void mesh_plink_timer(unsigned long data) ++sta->plink_retries; mod_plink_timer(sta, sta->plink_timeout); spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, - 0, 0); + mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, + sta->sta.addr, llid, 0, 0); break; } - reason = cpu_to_le16(MESH_MAX_RETRIES); + reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES); /* fall through on else */ case NL80211_PLINK_CNF_RCVD: /* confirm timer */ if (!reason) - reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT); + reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT); sta->plink_state = NL80211_PLINK_HOLDING; mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, - reason); + mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, + sta->sta.addr, llid, plid, reason); break; case NL80211_PLINK_HOLDING: /* holding timer */ @@ -396,7 +391,7 @@ int mesh_plink_open(struct sta_info *sta) mpl_dbg("Mesh plink: starting establishment with %pM\n", sta->sta.addr); - return mesh_plink_frame_tx(sdata, PLINK_OPEN, + return mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, sta->sta.addr, llid, 0, 0); } @@ -422,7 +417,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m struct ieee802_11_elems elems; struct sta_info *sta; enum plink_event event; - enum plink_frame_type ftype; + enum ieee80211_self_protected_actioncode ftype; size_t baselen; bool deactivated, matches_local = true; u8 ie_len; @@ -449,14 +444,15 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m return; } - baseaddr = mgmt->u.action.u.plink_action.variable; - baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt; - if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) { + baseaddr = mgmt->u.action.u.self_prot.variable; + baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; + if (mgmt->u.action.u.self_prot.action_code == + WLAN_SP_MESH_PEERING_CONFIRM) { baseaddr += 4; baselen += 4; } ieee802_11_parse_elems(baseaddr, len - baselen, &elems); - if (!elems.peer_link) { + if (!elems.peering) { mpl_dbg("Mesh plink: missing necessary peer link ie\n"); return; } @@ -466,31 +462,34 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m return; } - ftype = mgmt->u.action.u.plink_action.action_code; - ie_len = elems.peer_link_len; - if ((ftype == PLINK_OPEN && ie_len != 6) || - (ftype == PLINK_CONFIRM && ie_len != 8) || - (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) { + ftype = mgmt->u.action.u.self_prot.action_code; + ie_len = elems.peering_len; + if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || + (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || + (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 + && ie_len != 8)) { mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", ftype, ie_len); return; } - if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { + if (ftype != WLAN_SP_MESH_PEERING_CLOSE && + (!elems.mesh_id || !elems.mesh_config)) { mpl_dbg("Mesh plink: missing necessary ie\n"); return; } /* Note the lines below are correct, the llid in the frame is the plid * from the point of view of this host. */ - memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2); - if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10)) - memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2); + memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); + if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || + (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) + memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); rcu_read_lock(); sta = sta_info_get(sdata, mgmt->sa); - if (!sta && ftype != PLINK_OPEN) { + if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) { mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); rcu_read_unlock(); return; @@ -509,30 +508,30 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m /* Now we will figure out the appropriate event... */ event = PLINK_UNDEFINED; - if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) { + if (ftype != WLAN_SP_MESH_PEERING_CLOSE && + (!mesh_matches_local(&elems, sdata))) { matches_local = false; switch (ftype) { - case PLINK_OPEN: + case WLAN_SP_MESH_PEERING_OPEN: event = OPN_RJCT; break; - case PLINK_CONFIRM: + case WLAN_SP_MESH_PEERING_CONFIRM: event = CNF_RJCT; break; - case PLINK_CLOSE: - /* avoid warning */ + default: break; } } if (!sta && !matches_local) { rcu_read_unlock(); - reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); + reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); llid = 0; - mesh_plink_frame_tx(sdata, PLINK_CLOSE, mgmt->sa, llid, - plid, reason); + mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, + mgmt->sa, llid, plid, reason); return; } else if (!sta) { - /* ftype == PLINK_OPEN */ + /* ftype == WLAN_SP_MESH_PEERING_OPEN */ u32 rates; rcu_read_unlock(); @@ -557,21 +556,21 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m } else if (matches_local) { spin_lock_bh(&sta->lock); switch (ftype) { - case PLINK_OPEN: + case WLAN_SP_MESH_PEERING_OPEN: if (!mesh_plink_free_count(sdata) || (sta->plid && sta->plid != plid)) event = OPN_IGNR; else event = OPN_ACPT; break; - case PLINK_CONFIRM: + case WLAN_SP_MESH_PEERING_CONFIRM: if (!mesh_plink_free_count(sdata) || (sta->llid != llid || sta->plid != plid)) event = CNF_IGNR; else event = CNF_ACPT; break; - case PLINK_CLOSE: + case WLAN_SP_MESH_PEERING_CLOSE: if (sta->plink_state == NL80211_PLINK_ESTAB) /* Do not check for llid or plid. This does not * follow the standard but since multiple plinks @@ -620,10 +619,12 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m sta->llid = llid; mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, - 0, 0); - mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, - llid, plid, 0); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_OPEN, + sta->sta.addr, llid, 0, 0); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CONFIRM, + sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); @@ -635,10 +636,10 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m switch (event) { case OPN_RJCT: case CNF_RJCT: - reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); + reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); case CLS_ACPT: if (!reason) - reason = cpu_to_le16(MESH_CLOSE_RCVD); + reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; sta->plink_state = NL80211_PLINK_HOLDING; if (!mod_plink_timer(sta, @@ -647,8 +648,9 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m llid = sta->llid; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, - plid, reason); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CLOSE, + sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: /* retry timer is left untouched */ @@ -656,8 +658,9 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m sta->plid = plid; llid = sta->llid; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, - plid, 0); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CONFIRM, + sta->sta.addr, llid, plid, 0); break; case CNF_ACPT: sta->plink_state = NL80211_PLINK_CNF_RCVD; @@ -677,10 +680,10 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m switch (event) { case OPN_RJCT: case CNF_RJCT: - reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); + reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); case CLS_ACPT: if (!reason) - reason = cpu_to_le16(MESH_CLOSE_RCVD); + reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; sta->plink_state = NL80211_PLINK_HOLDING; if (!mod_plink_timer(sta, @@ -689,14 +692,15 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m llid = sta->llid; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, - plid, reason); + mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, + sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: llid = sta->llid; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, - plid, 0); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CONFIRM, + sta->sta.addr, llid, plid, 0); break; case CNF_ACPT: del_timer(&sta->plink_timer); @@ -717,10 +721,10 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m switch (event) { case OPN_RJCT: case CNF_RJCT: - reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); + reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); case CLS_ACPT: if (!reason) - reason = cpu_to_le16(MESH_CLOSE_RCVD); + reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; sta->plink_state = NL80211_PLINK_HOLDING; if (!mod_plink_timer(sta, @@ -729,8 +733,9 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m llid = sta->llid; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, - plid, reason); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CLOSE, + sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: del_timer(&sta->plink_timer); @@ -740,8 +745,9 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mpl_dbg("Mesh plink with %pM ESTABLISHED\n", sta->sta.addr); - mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, - plid, 0); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CONFIRM, + sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); @@ -752,7 +758,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m case NL80211_PLINK_ESTAB: switch (event) { case CLS_ACPT: - reason = cpu_to_le16(MESH_CLOSE_RCVD); + reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; deactivated = __mesh_plink_deactivate(sta); sta->plink_state = NL80211_PLINK_HOLDING; @@ -761,14 +767,15 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m spin_unlock_bh(&sta->lock); if (deactivated) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); - mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, - plid, reason); + mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, + sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: llid = sta->llid; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, - plid, 0); + mesh_plink_frame_tx(sdata, + WLAN_SP_MESH_PEERING_CONFIRM, + sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); @@ -790,8 +797,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m llid = sta->llid; reason = sta->reason; spin_unlock_bh(&sta->lock); - mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, - llid, plid, reason); + mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, + sta->sta.addr, llid, plid, reason); break; default: spin_unlock_bh(&sta->lock); diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index d6470c7fd6c..60a6f273cd3 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1482,10 +1482,14 @@ static bool ieee80211_assoc_success(struct ieee80211_work *wk, ifmgd->aid = aid; - sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); - if (!sta) { - printk(KERN_DEBUG "%s: failed to alloc STA entry for" - " the AP\n", sdata->name); + mutex_lock(&sdata->local->sta_mtx); + /* + * station info was already allocated and inserted before + * the association and should be available to us + */ + sta = sta_info_get_rx(sdata, cbss->bssid); + if (WARN_ON(!sta)) { + mutex_unlock(&sdata->local->sta_mtx); return false; } @@ -1556,7 +1560,8 @@ static bool ieee80211_assoc_success(struct ieee80211_work *wk, if (elems.wmm_param) set_sta_flags(sta, WLAN_STA_WME); - err = sta_info_insert(sta); + /* sta_info_reinsert will also unlock the mutex lock */ + err = sta_info_reinsert(sta); sta = NULL; if (err) { printk(KERN_DEBUG "%s: failed to insert STA entry for" @@ -2429,6 +2434,32 @@ int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, return 0; } +/* create and insert a dummy station entry */ +static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata, + u8 *bssid) { + struct sta_info *sta; + int err; + + sta = sta_info_alloc(sdata, bssid, GFP_KERNEL); + if (!sta) { + printk(KERN_DEBUG "%s: failed to alloc STA entry for" + " the AP\n", sdata->name); + return -ENOMEM; + } + + sta->dummy = true; + + err = sta_info_insert(sta); + sta = NULL; + if (err) { + printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for" + " the AP (error %d)\n", sdata->name, err); + return err; + } + + return 0; +} + static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, struct sk_buff *skb) { @@ -2436,9 +2467,11 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, struct ieee80211_mgmt *mgmt; struct ieee80211_rx_status *rx_status; struct ieee802_11_elems elems; + struct cfg80211_bss *cbss = wk->assoc.bss; u16 status; if (!skb) { + sta_info_destroy_addr(wk->sdata, cbss->bssid); cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); goto destroy; } @@ -2468,12 +2501,16 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { mutex_unlock(&wk->sdata->u.mgd.mtx); /* oops -- internal error -- send timeout for now */ + sta_info_destroy_addr(wk->sdata, cbss->bssid); cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); return WORK_DONE_DESTROY; } mutex_unlock(&wk->sdata->u.mgd.mtx); + } else { + /* assoc failed - destroy the dummy station entry */ + sta_info_destroy_addr(wk->sdata, cbss->bssid); } cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); @@ -2492,7 +2529,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, struct ieee80211_bss *bss = (void *)req->bss->priv; struct ieee80211_work *wk; const u8 *ssid; - int i; + int i, err; mutex_lock(&ifmgd->mtx); if (ifmgd->associated) { @@ -2517,6 +2554,16 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, if (!wk) return -ENOMEM; + /* + * create a dummy station info entry in order + * to start accepting incoming EAPOL packets from the station + */ + err = ieee80211_pre_assoc(sdata, req->bss->bssid); + if (err) { + kfree(wk); + return err; + } + ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index fe2c2a71779..f45fd2fedc2 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -850,8 +850,21 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx) ieee80211_is_pspoll(hdr->frame_control)) && rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && rx->sdata->vif.type != NL80211_IFTYPE_WDS && - (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) + (!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) { + if (rx->sta && rx->sta->dummy && + ieee80211_is_data_present(hdr->frame_control)) { + u16 ethertype; + u8 *payload; + + payload = rx->skb->data + + ieee80211_hdrlen(hdr->frame_control); + ethertype = (payload[6] << 8) | payload[7]; + if (cpu_to_be16(ethertype) == + rx->sdata->control_port_protocol) + return RX_CONTINUE; + } return RX_DROP_MONITOR; + } return RX_CONTINUE; } @@ -2220,12 +2233,29 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) goto handled; } break; + case WLAN_CATEGORY_SELF_PROTECTED: + switch (mgmt->u.action.u.self_prot.action_code) { + case WLAN_SP_MESH_PEERING_OPEN: + case WLAN_SP_MESH_PEERING_CLOSE: + case WLAN_SP_MESH_PEERING_CONFIRM: + if (!ieee80211_vif_is_mesh(&sdata->vif)) + goto invalid; + if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE) + /* userspace handles this frame */ + break; + goto queue; + case WLAN_SP_MGK_INFORM: + case WLAN_SP_MGK_ACK: + if (!ieee80211_vif_is_mesh(&sdata->vif)) + goto invalid; + break; + } + break; case WLAN_CATEGORY_MESH_ACTION: if (!ieee80211_vif_is_mesh(&sdata->vif)) break; - goto queue; - case WLAN_CATEGORY_MESH_PATH_SEL: - if (!mesh_path_sel_is_hwmp(sdata)) + if (mesh_action_is_path_sel(mgmt) && + (!mesh_path_sel_is_hwmp(sdata))) break; goto queue; } @@ -2686,7 +2716,9 @@ static int prepare_for_handlers(struct ieee80211_rx_data *rx, } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { if (!(status->rx_flags & IEEE80211_RX_IN_SCAN) && - !ieee80211_is_beacon(hdr->frame_control)) + !ieee80211_is_beacon(hdr->frame_control) && + !(ieee80211_is_action(hdr->frame_control) && + sdata->vif.p2p)) return 0; status->rx_flags &= ~IEEE80211_RX_RA_MATCH; } @@ -2791,7 +2823,7 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, if (ieee80211_is_data(fc)) { prev_sta = NULL; - for_each_sta_info(local, hdr->addr2, sta, tmp) { + for_each_sta_info_rx(local, hdr->addr2, sta, tmp) { if (!prev_sta) { prev_sta = sta; continue; @@ -2835,7 +2867,7 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, continue; } - rx.sta = sta_info_get_bss(prev, hdr->addr2); + rx.sta = sta_info_get_bss_rx(prev, hdr->addr2); rx.sdata = prev; ieee80211_prepare_and_rx_handle(&rx, skb, false); @@ -2843,7 +2875,7 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, } if (prev) { - rx.sta = sta_info_get_bss(prev, hdr->addr2); + rx.sta = sta_info_get_bss_rx(prev, hdr->addr2); rx.sdata = prev; if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 0bdbf3b8f28..6bc17fb80ee 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -100,6 +100,27 @@ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, lockdep_is_held(&local->sta_lock) || lockdep_is_held(&local->sta_mtx)); while (sta) { + if (sta->sdata == sdata && !sta->dummy && + memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) + break; + sta = rcu_dereference_check(sta->hnext, + lockdep_is_held(&local->sta_lock) || + lockdep_is_held(&local->sta_mtx)); + } + return sta; +} + +/* get a station info entry even if it is a dummy station*/ +struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, + const u8 *addr) +{ + struct ieee80211_local *local = sdata->local; + struct sta_info *sta; + + sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], + lockdep_is_held(&local->sta_lock) || + lockdep_is_held(&local->sta_mtx)); + while (sta) { if (sta->sdata == sdata && memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) break; @@ -126,6 +147,32 @@ struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, while (sta) { if ((sta->sdata == sdata || (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && + !sta->dummy && + memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) + break; + sta = rcu_dereference_check(sta->hnext, + lockdep_is_held(&local->sta_lock) || + lockdep_is_held(&local->sta_mtx)); + } + return sta; +} + +/* + * Get sta info either from the specified interface + * or from one of its vlans (including dummy stations) + */ +struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, + const u8 *addr) +{ + struct ieee80211_local *local = sdata->local; + struct sta_info *sta; + + sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], + lockdep_is_held(&local->sta_lock) || + lockdep_is_held(&local->sta_mtx)); + while (sta) { + if ((sta->sdata == sdata || + (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) break; sta = rcu_dereference_check(sta->hnext, @@ -280,7 +327,8 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, return sta; } -static int sta_info_finish_insert(struct sta_info *sta, bool async) +static int sta_info_finish_insert(struct sta_info *sta, + bool async, bool dummy_reinsert) { struct ieee80211_local *local = sta->local; struct ieee80211_sub_if_data *sdata = sta->sdata; @@ -290,51 +338,58 @@ static int sta_info_finish_insert(struct sta_info *sta, bool async) lockdep_assert_held(&local->sta_mtx); - /* notify driver */ - if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) - sdata = container_of(sdata->bss, - struct ieee80211_sub_if_data, - u.ap); - err = drv_sta_add(local, sdata, &sta->sta); - if (err) { - if (!async) - return err; - printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to driver (%d)" - " - keeping it anyway.\n", - sdata->name, sta->sta.addr, err); - } else { - sta->uploaded = true; + if (!sta->dummy || dummy_reinsert) { + /* notify driver */ + if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) + sdata = container_of(sdata->bss, + struct ieee80211_sub_if_data, + u.ap); + err = drv_sta_add(local, sdata, &sta->sta); + if (err) { + if (!async) + return err; + printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to " + "driver (%d) - keeping it anyway.\n", + sdata->name, sta->sta.addr, err); + } else { + sta->uploaded = true; #ifdef CONFIG_MAC80211_VERBOSE_DEBUG - if (async) - wiphy_debug(local->hw.wiphy, - "Finished adding IBSS STA %pM\n", - sta->sta.addr); + if (async) + wiphy_debug(local->hw.wiphy, + "Finished adding IBSS STA %pM\n", + sta->sta.addr); #endif + } + + sdata = sta->sdata; } - sdata = sta->sdata; + if (!dummy_reinsert) { + if (!async) { + local->num_sta++; + local->sta_generation++; + smp_mb(); - if (!async) { - local->num_sta++; - local->sta_generation++; - smp_mb(); + /* make the station visible */ + spin_lock_irqsave(&local->sta_lock, flags); + sta_info_hash_add(local, sta); + spin_unlock_irqrestore(&local->sta_lock, flags); + } - /* make the station visible */ - spin_lock_irqsave(&local->sta_lock, flags); - sta_info_hash_add(local, sta); - spin_unlock_irqrestore(&local->sta_lock, flags); + list_add(&sta->list, &local->sta_list); + } else { + sta->dummy = false; } - list_add(&sta->list, &local->sta_list); - - ieee80211_sta_debugfs_add(sta); - rate_control_add_sta_debugfs(sta); - - memset(&sinfo, 0, sizeof(sinfo)); - sinfo.filled = 0; - sinfo.generation = local->sta_generation; - cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); + if (!sta->dummy) { + ieee80211_sta_debugfs_add(sta); + rate_control_add_sta_debugfs(sta); + memset(&sinfo, 0, sizeof(sinfo)); + sinfo.filled = 0; + sinfo.generation = local->sta_generation; + cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); + } return 0; } @@ -351,7 +406,7 @@ static void sta_info_finish_pending(struct ieee80211_local *local) list_del(&sta->list); spin_unlock_irqrestore(&local->sta_lock, flags); - sta_info_finish_insert(sta, true); + sta_info_finish_insert(sta, true, false); spin_lock_irqsave(&local->sta_lock, flags); } @@ -368,106 +423,117 @@ static void sta_info_finish_work(struct work_struct *work) mutex_unlock(&local->sta_mtx); } -int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) +static int sta_info_insert_check(struct sta_info *sta) { - struct ieee80211_local *local = sta->local; struct ieee80211_sub_if_data *sdata = sta->sdata; - unsigned long flags; - int err = 0; /* * Can't be a WARN_ON because it can be triggered through a race: * something inserts a STA (on one CPU) without holding the RTNL * and another CPU turns off the net device. */ - if (unlikely(!ieee80211_sdata_running(sdata))) { - err = -ENETDOWN; - rcu_read_lock(); - goto out_free; - } + if (unlikely(!ieee80211_sdata_running(sdata))) + return -ENETDOWN; if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || - is_multicast_ether_addr(sta->sta.addr))) { - err = -EINVAL; + is_multicast_ether_addr(sta->sta.addr))) + return -EINVAL; + + return 0; +} + +static int sta_info_insert_ibss(struct sta_info *sta) __acquires(RCU) +{ + struct ieee80211_local *local = sta->local; + struct ieee80211_sub_if_data *sdata = sta->sdata; + unsigned long flags; + + spin_lock_irqsave(&local->sta_lock, flags); + /* check if STA exists already */ + if (sta_info_get_bss_rx(sdata, sta->sta.addr)) { + spin_unlock_irqrestore(&local->sta_lock, flags); rcu_read_lock(); - goto out_free; + return -EEXIST; } - /* - * In ad-hoc mode, we sometimes need to insert stations - * from tasklet context from the RX path. To avoid races, - * always do so in that case -- see the comment below. - */ - if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { - spin_lock_irqsave(&local->sta_lock, flags); - /* check if STA exists already */ - if (sta_info_get_bss(sdata, sta->sta.addr)) { - spin_unlock_irqrestore(&local->sta_lock, flags); - rcu_read_lock(); - err = -EEXIST; - goto out_free; - } - - local->num_sta++; - local->sta_generation++; - smp_mb(); - sta_info_hash_add(local, sta); + local->num_sta++; + local->sta_generation++; + smp_mb(); + sta_info_hash_add(local, sta); - list_add_tail(&sta->list, &local->sta_pending_list); + list_add_tail(&sta->list, &local->sta_pending_list); - rcu_read_lock(); - spin_unlock_irqrestore(&local->sta_lock, flags); + rcu_read_lock(); + spin_unlock_irqrestore(&local->sta_lock, flags); #ifdef CONFIG_MAC80211_VERBOSE_DEBUG - wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", - sta->sta.addr); + wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", + sta->sta.addr); #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ - ieee80211_queue_work(&local->hw, &local->sta_finish_work); + ieee80211_queue_work(&local->hw, &local->sta_finish_work); - return 0; - } + return 0; +} + +/* + * should be called with sta_mtx locked + * this function replaces the mutex lock + * with a RCU lock + */ +static int sta_info_insert_non_ibss(struct sta_info *sta) __acquires(RCU) +{ + struct ieee80211_local *local = sta->local; + struct ieee80211_sub_if_data *sdata = sta->sdata; + unsigned long flags; + struct sta_info *exist_sta; + bool dummy_reinsert = false; + int err = 0; + + lockdep_assert_held(&local->sta_mtx); /* * On first glance, this will look racy, because the code - * below this point, which inserts a station with sleeping, + * in this function, which inserts a station with sleeping, * unlocks the sta_lock between checking existence in the * hash table and inserting into it. * * However, it is not racy against itself because it keeps - * the mutex locked. It still seems to race against the - * above code that atomically inserts the station... That, - * however, is not true because the above code can only - * be invoked for IBSS interfaces, and the below code will - * not be -- and the two do not race against each other as - * the hash table also keys off the interface. + * the mutex locked. */ - might_sleep(); - - mutex_lock(&local->sta_mtx); - spin_lock_irqsave(&local->sta_lock, flags); - /* check if STA exists already */ - if (sta_info_get_bss(sdata, sta->sta.addr)) { - spin_unlock_irqrestore(&local->sta_lock, flags); - mutex_unlock(&local->sta_mtx); - rcu_read_lock(); - err = -EEXIST; - goto out_free; + /* + * check if STA exists already. + * only accept a scenario of a second call to sta_info_insert_non_ibss + * with a dummy station entry that was inserted earlier + * in that case - assume that the dummy station flag should + * be removed. + */ + exist_sta = sta_info_get_bss_rx(sdata, sta->sta.addr); + if (exist_sta) { + if (exist_sta == sta && sta->dummy) { + dummy_reinsert = true; + } else { + spin_unlock_irqrestore(&local->sta_lock, flags); + mutex_unlock(&local->sta_mtx); + rcu_read_lock(); + return -EEXIST; + } } spin_unlock_irqrestore(&local->sta_lock, flags); - err = sta_info_finish_insert(sta, false); + err = sta_info_finish_insert(sta, false, dummy_reinsert); if (err) { mutex_unlock(&local->sta_mtx); rcu_read_lock(); - goto out_free; + return err; } #ifdef CONFIG_MAC80211_VERBOSE_DEBUG - wiphy_debug(local->hw.wiphy, "Inserted STA %pM\n", sta->sta.addr); + wiphy_debug(local->hw.wiphy, "Inserted %sSTA %pM\n", + sta->dummy ? "dummy " : "", sta->sta.addr); #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ /* move reference to rcu-protected */ @@ -478,6 +544,51 @@ int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) mesh_accept_plinks_update(sdata); return 0; +} + +int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) +{ + struct ieee80211_local *local = sta->local; + struct ieee80211_sub_if_data *sdata = sta->sdata; + int err = 0; + + err = sta_info_insert_check(sta); + if (err) { + rcu_read_lock(); + goto out_free; + } + + /* + * In ad-hoc mode, we sometimes need to insert stations + * from tasklet context from the RX path. To avoid races, + * always do so in that case -- see the comment below. + */ + if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { + err = sta_info_insert_ibss(sta); + if (err) + goto out_free; + + return 0; + } + + /* + * It might seem that the function called below is in race against + * the function call above that atomically inserts the station... That, + * however, is not true because the above code can only + * be invoked for IBSS interfaces, and the below code will + * not be -- and the two do not race against each other as + * the hash table also keys off the interface. + */ + + might_sleep(); + + mutex_lock(&local->sta_mtx); + + err = sta_info_insert_non_ibss(sta); + if (err) + goto out_free; + + return 0; out_free: BUG_ON(!err); __sta_info_free(local, sta); @@ -493,6 +604,25 @@ int sta_info_insert(struct sta_info *sta) return err; } +/* Caller must hold sta->local->sta_mtx */ +int sta_info_reinsert(struct sta_info *sta) +{ + struct ieee80211_local *local = sta->local; + int err = 0; + + err = sta_info_insert_check(sta); + if (err) { + mutex_unlock(&local->sta_mtx); + return err; + } + + might_sleep(); + + err = sta_info_insert_non_ibss(sta); + rcu_read_unlock(); + return err; +} + static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) { /* @@ -733,7 +863,7 @@ int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) int ret; mutex_lock(&sdata->local->sta_mtx); - sta = sta_info_get(sdata, addr); + sta = sta_info_get_rx(sdata, addr); ret = __sta_info_destroy(sta); mutex_unlock(&sdata->local->sta_mtx); @@ -747,7 +877,7 @@ int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, int ret; mutex_lock(&sdata->local->sta_mtx); - sta = sta_info_get_bss(sdata, addr); + sta = sta_info_get_bss_rx(sdata, addr); ret = __sta_info_destroy(sta); mutex_unlock(&sdata->local->sta_mtx); diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 28beb78e601..e9eb565506d 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -238,10 +238,12 @@ struct sta_ampdu_mlme { * @plink_timer: peer link watch timer * @plink_timer_was_running: used by suspend/resume to restore timers * @debugfs: debug filesystem info - * @sta: station information we share with the driver * @dead: set to true when sta is unlinked * @uploaded: set to true when sta is uploaded to the driver * @lost_packets: number of consecutive lost packets + * @dummy: indicate a dummy station created for receiving + * EAP frames before association + * @sta: station information we share with the driver */ struct sta_info { /* General information, mostly static */ @@ -336,6 +338,9 @@ struct sta_info { unsigned int lost_packets; + /* should be right in front of sta to be in the same cache line */ + bool dummy; + /* keep last! */ struct ieee80211_sta sta; }; @@ -436,9 +441,15 @@ rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, const u8 *addr); +struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, + const u8 *addr); + struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr); +struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, + const u8 *addr); + static inline void for_each_sta_info_type_check(struct ieee80211_local *local, const u8 *addr, @@ -459,6 +470,22 @@ void for_each_sta_info_type_check(struct ieee80211_local *local, _sta = nxt, \ nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ ) \ + /* run code only if address matches and it's not a dummy sta */ \ + if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \ + !_sta->dummy) + +#define for_each_sta_info_rx(local, _addr, _sta, nxt) \ + for ( /* initialise loop */ \ + _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ + nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ + /* typecheck */ \ + for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ + /* continue condition */ \ + _sta; \ + /* advance loop */ \ + _sta = nxt, \ + nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ + ) \ /* compare address and run code only if it matches */ \ if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0) @@ -484,6 +511,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, int sta_info_insert(struct sta_info *sta); int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); int sta_info_insert_atomic(struct sta_info *sta); +int sta_info_reinsert(struct sta_info *sta); int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr); diff --git a/net/mac80211/status.c b/net/mac80211/status.c index a89cca3491b..e51bd2a1a07 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -187,6 +187,8 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) int rates_idx = -1; bool send_to_cooked; bool acked; + struct ieee80211_bar *bar; + u16 tid; for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { if (info->status.rates[i].idx < 0) { @@ -243,6 +245,22 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) tid, ssn); } + if (!acked && ieee80211_is_back_req(fc)) { + /* + * BAR failed, let's tear down the BA session as a + * last resort as some STAs (Intel 5100 on Windows) + * can get stuck when the BA window isn't flushed + * correctly. + */ + bar = (struct ieee80211_bar *) skb->data; + if (!(bar->control & IEEE80211_BAR_CTRL_MULTI_TID)) { + tid = (bar->control & + IEEE80211_BAR_CTRL_TID_INFO_MASK) >> + IEEE80211_BAR_CTRL_TID_INFO_SHIFT; + ieee80211_stop_tx_ba_session(&sta->sta, tid); + } + } + if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { ieee80211_handle_filtered_frame(local, sta, skb); rcu_read_unlock(); diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 69fd494f32f..01072639666 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2295,13 +2295,23 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); mgmt->u.beacon.beacon_int = cpu_to_le16(sdata->vif.bss_conf.beacon_int); - mgmt->u.beacon.capab_info = 0x0; /* 0x0 for MPs */ + mgmt->u.beacon.capab_info |= cpu_to_le16( + sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); pos = skb_put(skb, 2); *pos++ = WLAN_EID_SSID; *pos++ = 0x0; - mesh_mgmt_ies_add(skb, sdata); + if (mesh_add_srates_ie(skb, sdata) || + mesh_add_ds_params_ie(skb, sdata) || + mesh_add_ext_srates_ie(skb, sdata) || + mesh_add_rsn_ie(skb, sdata) || + mesh_add_meshid_ie(skb, sdata) || + mesh_add_meshconf_ie(skb, sdata) || + mesh_add_vendor_ies(skb, sdata)) { + pr_err("o11s: couldn't add ies!\n"); + goto out; + } } else { WARN_ON(1); goto out; |