mac80211: split off mesh handling entirely
This patch splits off mesh handling from the STA/IBSS. Unfortunately it increases mesh code size a bit, but I think it makes things clearer. The patch also reduces per-interface run-time memory usage. Also clean up a few places where ifdef is not required. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
committed by
John W. Linville
John W. Linville
parent
7c95069522
commit
472dbc45dc
@@ -12,6 +12,9 @@
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#include "ieee80211_i.h"
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#include "mesh.h"
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#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
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#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
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#define PP_OFFSET 1 /* Path Selection Protocol */
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#define PM_OFFSET 5 /* Path Selection Metric */
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#define CC_OFFSET 9 /* Congestion Control Mode */
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@@ -35,6 +38,16 @@ void ieee80211s_stop(void)
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kmem_cache_destroy(rm_cache);
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}
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static void ieee80211_mesh_housekeeping_timer(unsigned long data)
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{
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struct ieee80211_sub_if_data *sdata = (void *) data;
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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ifmsh->housekeeping = true;
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queue_work(local->hw.workqueue, &ifmsh->work);
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}
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/**
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* mesh_matches_local - check if the config of a mesh point matches ours
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*
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@@ -46,7 +59,7 @@ void ieee80211s_stop(void)
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*/
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bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_sta *sta = &sdata->u.sta;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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/*
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* As support for each feature is added, check for matching
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@@ -58,11 +71,11 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_dat
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* - MDA enabled
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* - Power management control on fc
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*/
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if (sta->mesh_id_len == ie->mesh_id_len &&
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memcmp(sta->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
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memcmp(sta->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 &&
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memcmp(sta->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 &&
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memcmp(sta->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0)
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if (ifmsh->mesh_id_len == ie->mesh_id_len &&
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memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
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memcmp(ifmsh->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 &&
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memcmp(ifmsh->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 &&
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memcmp(ifmsh->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0)
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return true;
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return false;
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@@ -95,11 +108,11 @@ void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
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*/
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free_plinks = mesh_plink_availables(sdata);
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if (free_plinks != sdata->u.sta.accepting_plinks)
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ieee80211_sta_timer((unsigned long) sdata);
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if (free_plinks != sdata->u.mesh.accepting_plinks)
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ieee80211_mesh_housekeeping_timer((unsigned long) sdata);
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}
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void mesh_ids_set_default(struct ieee80211_if_sta *sta)
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void mesh_ids_set_default(struct ieee80211_if_mesh *sta)
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{
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u8 def_id[4] = {0x00, 0x0F, 0xAC, 0xff};
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@@ -112,22 +125,22 @@ int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
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{
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int i;
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sdata->u.sta.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
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if (!sdata->u.sta.rmc)
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sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
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if (!sdata->u.mesh.rmc)
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return -ENOMEM;
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sdata->u.sta.rmc->idx_mask = RMC_BUCKETS - 1;
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sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
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for (i = 0; i < RMC_BUCKETS; i++)
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INIT_LIST_HEAD(&sdata->u.sta.rmc->bucket[i].list);
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INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list);
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return 0;
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}
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void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
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{
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struct mesh_rmc *rmc = sdata->u.sta.rmc;
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struct mesh_rmc *rmc = sdata->u.mesh.rmc;
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struct rmc_entry *p, *n;
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int i;
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if (!sdata->u.sta.rmc)
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if (!sdata->u.mesh.rmc)
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return;
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for (i = 0; i < RMC_BUCKETS; i++)
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@@ -137,7 +150,7 @@ void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
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}
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kfree(rmc);
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sdata->u.sta.rmc = NULL;
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sdata->u.mesh.rmc = NULL;
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}
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/**
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@@ -155,7 +168,7 @@ void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
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int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
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struct ieee80211_sub_if_data *sdata)
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{
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struct mesh_rmc *rmc = sdata->u.sta.rmc;
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struct mesh_rmc *rmc = sdata->u.mesh.rmc;
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u32 seqnum = 0;
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int entries = 0;
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u8 idx;
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@@ -217,11 +230,11 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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}
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}
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pos = skb_put(skb, 2 + sdata->u.sta.mesh_id_len);
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pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len);
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*pos++ = WLAN_EID_MESH_ID;
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*pos++ = sdata->u.sta.mesh_id_len;
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if (sdata->u.sta.mesh_id_len)
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memcpy(pos, sdata->u.sta.mesh_id, sdata->u.sta.mesh_id_len);
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*pos++ = sdata->u.mesh.mesh_id_len;
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if (sdata->u.mesh.mesh_id_len)
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memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len);
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pos = skb_put(skb, 21);
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*pos++ = WLAN_EID_MESH_CONFIG;
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@@ -230,15 +243,15 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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*pos++ = 1;
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/* Active path selection protocol ID */
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memcpy(pos, sdata->u.sta.mesh_pp_id, 4);
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memcpy(pos, sdata->u.mesh.mesh_pp_id, 4);
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pos += 4;
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/* Active path selection metric ID */
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memcpy(pos, sdata->u.sta.mesh_pm_id, 4);
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memcpy(pos, sdata->u.mesh.mesh_pm_id, 4);
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pos += 4;
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/* Congestion control mode identifier */
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memcpy(pos, sdata->u.sta.mesh_cc_id, 4);
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memcpy(pos, sdata->u.mesh.mesh_cc_id, 4);
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pos += 4;
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/* Channel precedence:
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@@ -248,8 +261,8 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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pos += 4;
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/* Mesh capability */
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sdata->u.sta.accepting_plinks = mesh_plink_availables(sdata);
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*pos++ = sdata->u.sta.accepting_plinks ? ACCEPT_PLINKS : 0x00;
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sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata);
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*pos++ = sdata->u.mesh.accepting_plinks ? ACCEPT_PLINKS : 0x00;
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*pos++ = 0x00;
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return;
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@@ -337,10 +350,10 @@ static void ieee80211_mesh_path_timer(unsigned long data)
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{
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struct ieee80211_sub_if_data *sdata =
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(struct ieee80211_sub_if_data *) data;
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struct ieee80211_if_sta *ifsta = &sdata->u.sta;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct ieee80211_local *local = wdev_priv(&sdata->wdev);
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queue_work(local->hw.workqueue, &ifsta->work);
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queue_work(local->hw.workqueue, &ifmsh->work);
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}
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struct mesh_table *mesh_table_grow(struct mesh_table *tbl)
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@@ -392,50 +405,255 @@ int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
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struct ieee80211_sub_if_data *sdata)
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{
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meshhdr->flags = 0;
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meshhdr->ttl = sdata->u.sta.mshcfg.dot11MeshTTL;
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put_unaligned(cpu_to_le32(sdata->u.sta.mesh_seqnum), &meshhdr->seqnum);
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sdata->u.sta.mesh_seqnum++;
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meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
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put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
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sdata->u.mesh.mesh_seqnum++;
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return 6;
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}
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static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_if_mesh *ifmsh)
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{
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bool free_plinks;
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#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
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printk(KERN_DEBUG "%s: running mesh housekeeping\n",
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sdata->dev->name);
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#endif
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ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
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mesh_path_expire(sdata);
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free_plinks = mesh_plink_availables(sdata);
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if (free_plinks != sdata->u.mesh.accepting_plinks)
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ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
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ifmsh->housekeeping = false;
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mod_timer(&ifmsh->housekeeping_timer,
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round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
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}
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void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct ieee80211_local *local = sdata->local;
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ifmsh->housekeeping = true;
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queue_work(local->hw.workqueue, &ifmsh->work);
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ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
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}
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void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
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{
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del_timer_sync(&sdata->u.mesh.housekeeping_timer);
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/*
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* When we get here, the interface is marked down.
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* Call synchronize_rcu() to wait for the RX path
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* should it be using the interface and enqueuing
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* frames at this very time on another CPU.
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*/
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synchronize_rcu();
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skb_queue_purge(&sdata->u.mesh.skb_queue);
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}
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static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
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u16 stype,
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struct ieee80211_mgmt *mgmt,
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size_t len,
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struct ieee80211_rx_status *rx_status)
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{
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struct ieee80211_local *local= sdata->local;
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struct ieee802_11_elems elems;
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struct ieee80211_channel *channel;
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u64 supp_rates = 0;
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size_t baselen;
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int freq;
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enum ieee80211_band band = rx_status->band;
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/* ignore ProbeResp to foreign address */
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if (stype == IEEE80211_STYPE_PROBE_RESP &&
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compare_ether_addr(mgmt->da, sdata->dev->dev_addr))
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return;
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baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
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if (baselen > len)
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return;
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ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
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&elems);
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if (elems.ds_params && elems.ds_params_len == 1)
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freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
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else
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freq = rx_status->freq;
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channel = ieee80211_get_channel(local->hw.wiphy, freq);
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if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
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return;
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if (elems.mesh_id && elems.mesh_config &&
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mesh_matches_local(&elems, sdata)) {
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supp_rates = ieee80211_sta_get_rates(local, &elems, band);
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mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
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mesh_peer_accepts_plinks(&elems));
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}
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}
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static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_mgmt *mgmt,
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size_t len,
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struct ieee80211_rx_status *rx_status)
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{
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switch (mgmt->u.action.category) {
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case PLINK_CATEGORY:
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mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
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break;
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case MESH_PATH_SEL_CATEGORY:
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mesh_rx_path_sel_frame(sdata, mgmt, len);
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break;
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}
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}
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static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_rx_status *rx_status;
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struct ieee80211_if_mesh *ifmsh;
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struct ieee80211_mgmt *mgmt;
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u16 stype;
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ifmsh = &sdata->u.mesh;
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rx_status = (struct ieee80211_rx_status *) skb->cb;
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mgmt = (struct ieee80211_mgmt *) skb->data;
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stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
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switch (stype) {
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case IEEE80211_STYPE_PROBE_RESP:
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case IEEE80211_STYPE_BEACON:
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ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
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rx_status);
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break;
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case IEEE80211_STYPE_ACTION:
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ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
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break;
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}
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kfree_skb(skb);
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}
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static void ieee80211_mesh_work(struct work_struct *work)
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{
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struct ieee80211_sub_if_data *sdata =
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container_of(work, struct ieee80211_sub_if_data, u.mesh.work);
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct sk_buff *skb;
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if (!netif_running(sdata->dev))
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return;
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if (local->sta_sw_scanning || local->sta_hw_scanning)
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return;
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while ((skb = skb_dequeue(&ifmsh->skb_queue)))
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ieee80211_mesh_rx_queued_mgmt(sdata, skb);
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if (ifmsh->preq_queue_len &&
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time_after(jiffies,
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ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
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mesh_path_start_discovery(sdata);
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if (ifmsh->housekeeping)
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ieee80211_mesh_housekeeping(sdata, ifmsh);
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}
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void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
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{
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struct ieee80211_sub_if_data *sdata;
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list)
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if (ieee80211_vif_is_mesh(&sdata->vif))
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queue_work(local->hw.workqueue, &sdata->u.mesh.work);
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rcu_read_unlock();
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}
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void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_sta *ifsta = &sdata->u.sta;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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ifsta->mshcfg.dot11MeshRetryTimeout = MESH_RET_T;
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ifsta->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T;
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ifsta->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T;
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ifsta->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR;
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ifsta->mshcfg.dot11MeshTTL = MESH_TTL;
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ifsta->mshcfg.auto_open_plinks = true;
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ifsta->mshcfg.dot11MeshMaxPeerLinks =
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INIT_WORK(&ifmsh->work, ieee80211_mesh_work);
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setup_timer(&ifmsh->housekeeping_timer,
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ieee80211_mesh_housekeeping_timer,
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(unsigned long) sdata);
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skb_queue_head_init(&sdata->u.mesh.skb_queue);
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ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T;
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ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T;
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ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T;
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ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR;
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ifmsh->mshcfg.dot11MeshTTL = MESH_TTL;
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ifmsh->mshcfg.auto_open_plinks = true;
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ifmsh->mshcfg.dot11MeshMaxPeerLinks =
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MESH_MAX_ESTAB_PLINKS;
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ifsta->mshcfg.dot11MeshHWMPactivePathTimeout =
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ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout =
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MESH_PATH_TIMEOUT;
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ifsta->mshcfg.dot11MeshHWMPpreqMinInterval =
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ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval =
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MESH_PREQ_MIN_INT;
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ifsta->mshcfg.dot11MeshHWMPnetDiameterTraversalTime =
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ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime =
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||||
MESH_DIAM_TRAVERSAL_TIME;
|
||||
ifsta->mshcfg.dot11MeshHWMPmaxPREQretries =
|
||||
ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries =
|
||||
MESH_MAX_PREQ_RETRIES;
|
||||
ifsta->mshcfg.path_refresh_time =
|
||||
ifmsh->mshcfg.path_refresh_time =
|
||||
MESH_PATH_REFRESH_TIME;
|
||||
ifsta->mshcfg.min_discovery_timeout =
|
||||
ifmsh->mshcfg.min_discovery_timeout =
|
||||
MESH_MIN_DISCOVERY_TIMEOUT;
|
||||
ifsta->accepting_plinks = true;
|
||||
ifsta->preq_id = 0;
|
||||
ifsta->dsn = 0;
|
||||
atomic_set(&ifsta->mpaths, 0);
|
||||
ifmsh->accepting_plinks = true;
|
||||
ifmsh->preq_id = 0;
|
||||
ifmsh->dsn = 0;
|
||||
atomic_set(&ifmsh->mpaths, 0);
|
||||
mesh_rmc_init(sdata);
|
||||
ifsta->last_preq = jiffies;
|
||||
ifmsh->last_preq = jiffies;
|
||||
/* Allocate all mesh structures when creating the first mesh interface. */
|
||||
if (!mesh_allocated)
|
||||
ieee80211s_init();
|
||||
mesh_ids_set_default(ifsta);
|
||||
setup_timer(&ifsta->mesh_path_timer,
|
||||
mesh_ids_set_default(ifmsh);
|
||||
setup_timer(&ifmsh->mesh_path_timer,
|
||||
ieee80211_mesh_path_timer,
|
||||
(unsigned long) sdata);
|
||||
INIT_LIST_HEAD(&ifsta->preq_queue.list);
|
||||
spin_lock_init(&ifsta->mesh_preq_queue_lock);
|
||||
INIT_LIST_HEAD(&ifmsh->preq_queue.list);
|
||||
spin_lock_init(&ifmsh->mesh_preq_queue_lock);
|
||||
}
|
||||
|
||||
ieee80211_rx_result
|
||||
ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
|
||||
struct ieee80211_rx_status *rx_status)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
||||
struct ieee80211_mgmt *mgmt;
|
||||
u16 fc;
|
||||
|
||||
if (skb->len < 24)
|
||||
return RX_DROP_MONITOR;
|
||||
|
||||
mgmt = (struct ieee80211_mgmt *) skb->data;
|
||||
fc = le16_to_cpu(mgmt->frame_control);
|
||||
|
||||
switch (fc & IEEE80211_FCTL_STYPE) {
|
||||
case IEEE80211_STYPE_PROBE_RESP:
|
||||
case IEEE80211_STYPE_BEACON:
|
||||
case IEEE80211_STYPE_ACTION:
|
||||
memcpy(skb->cb, rx_status, sizeof(*rx_status));
|
||||
skb_queue_tail(&ifmsh->skb_queue, skb);
|
||||
queue_work(local->hw.workqueue, &ifmsh->work);
|
||||
return RX_QUEUED;
|
||||
}
|
||||
|
||||
return RX_CONTINUE;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user