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Diffstat (limited to 'net/mac80211/mesh_hwmp.c')
-rw-r--r--net/mac80211/mesh_hwmp.c177
1 files changed, 127 insertions, 50 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 3460108810d5..174040a42887 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -8,10 +8,12 @@
*/
#include <linux/slab.h>
+#include "wme.h"
#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 +70,12 @@ 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 +134,25 @@ 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;
@@ -163,35 +166,63 @@ 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);
return 0;
}
+
+/* Headroom is not adjusted. Caller should ensure that skb has sufficient
+ * headroom in case the frame is encrypted. */
+static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+ skb_set_mac_header(skb, 0);
+ skb_set_network_header(skb, 0);
+ skb_set_transport_header(skb, 0);
+
+ /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
+ skb_set_queue_mapping(skb, IEEE80211_AC_VO);
+ skb->priority = 7;
+
+ info->control.vif = &sdata->vif;
+ ieee80211_set_qos_hdr(sdata, skb);
+}
+
/**
* mesh_send_path error - Sends a PERR mesh management frame
*
@@ -199,6 +230,10 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
* @target_sn: SN of the broken destination
* @target_rcode: reason code for this PERR
* @ra: node this frame is addressed to
+ *
+ * Note: This function may be called with driver locks taken that the driver
+ * also acquires in the TX path. To avoid a deadlock we don't transmit the
+ * frame directly but add it to the pending queue instead.
*/
int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
__le16 target_rcode, const u8 *ra,
@@ -212,7 +247,7 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
if (!skb)
return -1;
- skb_reserve(skb, local->hw.extra_tx_headroom);
+ skb_reserve(skb, local->tx_headroom + local->hw.extra_tx_headroom);
/* 25 is the size of the common mgmt part (24) plus the size of the
* common action part (1)
*/
@@ -224,9 +259,11 @@ 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;
@@ -251,7 +288,9 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
pos += 4;
memcpy(pos, &target_rcode, 2);
- ieee80211_tx_skb(sdata, skb);
+ /* see note in function header */
+ prepare_frame_for_deferred_tx(sdata, skb);
+ ieee80211_add_pending_skb(local, skb);
return 0;
}
@@ -449,7 +488,6 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
if (fresh_info) {
mesh_path_assign_nexthop(mpath, sta);
- mpath->flags &= ~MESH_PATH_SN_VALID;
mpath->metric = last_hop_metric;
mpath->exp_time = time_after(mpath->exp_time, exp_time)
? mpath->exp_time : exp_time;
@@ -484,10 +522,10 @@ 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;
@@ -523,7 +561,7 @@ 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,
@@ -543,7 +581,7 @@ 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);
@@ -578,7 +616,7 @@ 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
@@ -684,6 +722,8 @@ 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) {
@@ -692,12 +732,19 @@ 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);
@@ -709,18 +756,28 @@ 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();
}
@@ -732,11 +789,20 @@ void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems elems;
size_t baselen;
u32 last_hop_metric;
+ struct sta_info *sta;
/* need action_code */
if (len < IEEE80211_MIN_ACTION_SIZE + 1)
return;
+ rcu_read_lock();
+ sta = sta_info_get(sdata, mgmt->sa);
+ if (!sta || sta->plink_state != NL80211_PLINK_ESTAB) {
+ rcu_read_unlock();
+ return;
+ }
+ rcu_read_unlock();
+
baselen = (u8 *) mgmt->u.action.u.mesh_action.variable - (u8 *) mgmt;
ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable,
len - baselen, &elems);
@@ -788,16 +854,16 @@ 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;
}
- spin_lock(&ifmsh->mesh_preq_queue_lock);
+ spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
if (ifmsh->preq_queue_len == MAX_PREQ_QUEUE_LEN) {
- spin_unlock(&ifmsh->mesh_preq_queue_lock);
+ 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;
}
@@ -806,7 +872,7 @@ static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
list_add_tail(&preq_node->list, &ifmsh->preq_queue.list);
++ifmsh->preq_queue_len;
- spin_unlock(&ifmsh->mesh_preq_queue_lock);
+ spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata)))
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
@@ -982,35 +1048,46 @@ 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);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 06:08:03 +0100