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Diffstat (limited to 'net/mac80211/mesh_pathtbl.c')
-rw-r--r--net/mac80211/mesh_pathtbl.c270
1 files changed, 193 insertions, 77 deletions
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 99c2d360888..3c72557df45 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -9,7 +9,6 @@
#include <linux/etherdevice.h>
#include <linux/list.h>
-#include <linux/netdevice.h>
#include <linux/random.h>
#include <linux/spinlock.h>
#include <linux/string.h>
@@ -37,6 +36,7 @@ struct mpath_node {
};
static struct mesh_table *mesh_paths;
+static struct mesh_table *mpp_paths; /* Store paths for MPP&MAP */
/* This lock will have the grow table function as writer and add / delete nodes
* as readers. When reading the table (i.e. doing lookups) we are well protected
@@ -62,13 +62,13 @@ void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta)
/**
* mesh_path_lookup - look up a path in the mesh path table
* @dst: hardware address (ETH_ALEN length) of destination
- * @dev: local interface
+ * @sdata: local subif
*
* Returns: pointer to the mesh path structure, or NULL if not found
*
* Locking: must be called within a read rcu section.
*/
-struct mesh_path *mesh_path_lookup(u8 *dst, struct net_device *dev)
+struct mesh_path *mesh_path_lookup(u8 *dst, struct ieee80211_sub_if_data *sdata)
{
struct mesh_path *mpath;
struct hlist_node *n;
@@ -78,10 +78,10 @@ struct mesh_path *mesh_path_lookup(u8 *dst, struct net_device *dev)
tbl = rcu_dereference(mesh_paths);
- bucket = &tbl->hash_buckets[mesh_table_hash(dst, dev, tbl)];
+ bucket = &tbl->hash_buckets[mesh_table_hash(dst, sdata, tbl)];
hlist_for_each_entry_rcu(node, n, bucket, list) {
mpath = node->mpath;
- if (mpath->dev == dev &&
+ if (mpath->sdata == sdata &&
memcmp(dst, mpath->dst, ETH_ALEN) == 0) {
if (MPATH_EXPIRED(mpath)) {
spin_lock_bh(&mpath->state_lock);
@@ -95,16 +95,44 @@ struct mesh_path *mesh_path_lookup(u8 *dst, struct net_device *dev)
return NULL;
}
+struct mesh_path *mpp_path_lookup(u8 *dst, struct ieee80211_sub_if_data *sdata)
+{
+ struct mesh_path *mpath;
+ struct hlist_node *n;
+ struct hlist_head *bucket;
+ struct mesh_table *tbl;
+ struct mpath_node *node;
+
+ tbl = rcu_dereference(mpp_paths);
+
+ bucket = &tbl->hash_buckets[mesh_table_hash(dst, sdata, tbl)];
+ hlist_for_each_entry_rcu(node, n, bucket, list) {
+ mpath = node->mpath;
+ if (mpath->sdata == sdata &&
+ memcmp(dst, mpath->dst, ETH_ALEN) == 0) {
+ if (MPATH_EXPIRED(mpath)) {
+ spin_lock_bh(&mpath->state_lock);
+ if (MPATH_EXPIRED(mpath))
+ mpath->flags &= ~MESH_PATH_ACTIVE;
+ spin_unlock_bh(&mpath->state_lock);
+ }
+ return mpath;
+ }
+ }
+ return NULL;
+}
+
+
/**
* mesh_path_lookup_by_idx - look up a path in the mesh path table by its index
* @idx: index
- * @dev: local interface, or NULL for all entries
+ * @sdata: local subif, or NULL for all entries
*
* Returns: pointer to the mesh path structure, or NULL if not found.
*
* Locking: must be called within a read rcu section.
*/
-struct mesh_path *mesh_path_lookup_by_idx(int idx, struct net_device *dev)
+struct mesh_path *mesh_path_lookup_by_idx(int idx, struct ieee80211_sub_if_data *sdata)
{
struct mpath_node *node;
struct hlist_node *p;
@@ -112,7 +140,7 @@ struct mesh_path *mesh_path_lookup_by_idx(int idx, struct net_device *dev)
int j = 0;
for_each_mesh_entry(mesh_paths, p, node, i) {
- if (dev && node->mpath->dev != dev)
+ if (sdata && node->mpath->sdata != sdata)
continue;
if (j++ == idx) {
if (MPATH_EXPIRED(node->mpath)) {
@@ -131,15 +159,14 @@ struct mesh_path *mesh_path_lookup_by_idx(int idx, struct net_device *dev)
/**
* mesh_path_add - allocate and add a new path to the mesh path table
* @addr: destination address of the path (ETH_ALEN length)
- * @dev: local interface
+ * @sdata: local subif
*
* Returns: 0 on sucess
*
* State: the initial state of the new path is set to 0
*/
-int mesh_path_add(u8 *dst, struct net_device *dev)
+int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata)
{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct mesh_path *mpath, *new_mpath;
struct mpath_node *node, *new_node;
struct hlist_head *bucket;
@@ -148,33 +175,28 @@ int mesh_path_add(u8 *dst, struct net_device *dev)
int err = 0;
u32 hash_idx;
- if (memcmp(dst, dev->dev_addr, ETH_ALEN) == 0)
+ if (memcmp(dst, sdata->dev->dev_addr, ETH_ALEN) == 0)
/* never add ourselves as neighbours */
return -ENOTSUPP;
if (is_multicast_ether_addr(dst))
return -ENOTSUPP;
- if (atomic_add_unless(&sdata->u.sta.mpaths, 1, MESH_MAX_MPATHS) == 0)
+ if (atomic_add_unless(&sdata->u.mesh.mpaths, 1, MESH_MAX_MPATHS) == 0)
return -ENOSPC;
+ err = -ENOMEM;
new_mpath = kzalloc(sizeof(struct mesh_path), GFP_KERNEL);
- if (!new_mpath) {
- atomic_dec(&sdata->u.sta.mpaths);
- err = -ENOMEM;
- goto endadd2;
- }
+ if (!new_mpath)
+ goto err_path_alloc;
+
new_node = kmalloc(sizeof(struct mpath_node), GFP_KERNEL);
- if (!new_node) {
- kfree(new_mpath);
- atomic_dec(&sdata->u.sta.mpaths);
- err = -ENOMEM;
- goto endadd2;
- }
+ if (!new_node)
+ goto err_node_alloc;
read_lock(&pathtbl_resize_lock);
memcpy(new_mpath->dst, dst, ETH_ALEN);
- new_mpath->dev = dev;
+ new_mpath->sdata = sdata;
new_mpath->flags = 0;
skb_queue_head_init(&new_mpath->frame_queue);
new_node->mpath = new_mpath;
@@ -184,21 +206,16 @@ int mesh_path_add(u8 *dst, struct net_device *dev)
spin_lock_init(&new_mpath->state_lock);
init_timer(&new_mpath->timer);
- hash_idx = mesh_table_hash(dst, dev, mesh_paths);
+ hash_idx = mesh_table_hash(dst, sdata, mesh_paths);
bucket = &mesh_paths->hash_buckets[hash_idx];
spin_lock(&mesh_paths->hashwlock[hash_idx]);
+ err = -EEXIST;
hlist_for_each_entry(node, n, bucket, list) {
mpath = node->mpath;
- if (mpath->dev == dev && memcmp(dst, mpath->dst, ETH_ALEN)
- == 0) {
- err = -EEXIST;
- atomic_dec(&sdata->u.sta.mpaths);
- kfree(new_node);
- kfree(new_mpath);
- goto endadd;
- }
+ if (mpath->sdata == sdata && memcmp(dst, mpath->dst, ETH_ALEN) == 0)
+ goto err_exists;
}
hlist_add_head_rcu(&new_node->list, bucket);
@@ -206,10 +223,9 @@ int mesh_path_add(u8 *dst, struct net_device *dev)
mesh_paths->mean_chain_len * (mesh_paths->hash_mask + 1))
grow = 1;
-endadd:
spin_unlock(&mesh_paths->hashwlock[hash_idx]);
read_unlock(&pathtbl_resize_lock);
- if (!err && grow) {
+ if (grow) {
struct mesh_table *oldtbl, *newtbl;
write_lock(&pathtbl_resize_lock);
@@ -217,7 +233,7 @@ endadd:
newtbl = mesh_table_grow(mesh_paths);
if (!newtbl) {
write_unlock(&pathtbl_resize_lock);
- return -ENOMEM;
+ return 0;
}
rcu_assign_pointer(mesh_paths, newtbl);
write_unlock(&pathtbl_resize_lock);
@@ -225,7 +241,101 @@ endadd:
synchronize_rcu();
mesh_table_free(oldtbl, false);
}
-endadd2:
+ return 0;
+
+err_exists:
+ spin_unlock(&mesh_paths->hashwlock[hash_idx]);
+ read_unlock(&pathtbl_resize_lock);
+ kfree(new_node);
+err_node_alloc:
+ kfree(new_mpath);
+err_path_alloc:
+ atomic_dec(&sdata->u.mesh.mpaths);
+ return err;
+}
+
+
+int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata)
+{
+ struct mesh_path *mpath, *new_mpath;
+ struct mpath_node *node, *new_node;
+ struct hlist_head *bucket;
+ struct hlist_node *n;
+ int grow = 0;
+ int err = 0;
+ u32 hash_idx;
+
+
+ if (memcmp(dst, sdata->dev->dev_addr, ETH_ALEN) == 0)
+ /* never add ourselves as neighbours */
+ return -ENOTSUPP;
+
+ if (is_multicast_ether_addr(dst))
+ return -ENOTSUPP;
+
+ err = -ENOMEM;
+ new_mpath = kzalloc(sizeof(struct mesh_path), GFP_KERNEL);
+ if (!new_mpath)
+ goto err_path_alloc;
+
+ new_node = kmalloc(sizeof(struct mpath_node), GFP_KERNEL);
+ if (!new_node)
+ goto err_node_alloc;
+
+ read_lock(&pathtbl_resize_lock);
+ memcpy(new_mpath->dst, dst, ETH_ALEN);
+ memcpy(new_mpath->mpp, mpp, ETH_ALEN);
+ new_mpath->sdata = sdata;
+ new_mpath->flags = 0;
+ skb_queue_head_init(&new_mpath->frame_queue);
+ new_node->mpath = new_mpath;
+ new_mpath->exp_time = jiffies;
+ spin_lock_init(&new_mpath->state_lock);
+
+ hash_idx = mesh_table_hash(dst, sdata, mpp_paths);
+ bucket = &mpp_paths->hash_buckets[hash_idx];
+
+ spin_lock(&mpp_paths->hashwlock[hash_idx]);
+
+ err = -EEXIST;
+ hlist_for_each_entry(node, n, bucket, list) {
+ mpath = node->mpath;
+ if (mpath->sdata == sdata && memcmp(dst, mpath->dst, ETH_ALEN) == 0)
+ goto err_exists;
+ }
+
+ hlist_add_head_rcu(&new_node->list, bucket);
+ if (atomic_inc_return(&mpp_paths->entries) >=
+ mpp_paths->mean_chain_len * (mpp_paths->hash_mask + 1))
+ grow = 1;
+
+ spin_unlock(&mpp_paths->hashwlock[hash_idx]);
+ read_unlock(&pathtbl_resize_lock);
+ if (grow) {
+ struct mesh_table *oldtbl, *newtbl;
+
+ write_lock(&pathtbl_resize_lock);
+ oldtbl = mpp_paths;
+ newtbl = mesh_table_grow(mpp_paths);
+ if (!newtbl) {
+ write_unlock(&pathtbl_resize_lock);
+ return 0;
+ }
+ rcu_assign_pointer(mpp_paths, newtbl);
+ write_unlock(&pathtbl_resize_lock);
+
+ synchronize_rcu();
+ mesh_table_free(oldtbl, false);
+ }
+ return 0;
+
+err_exists:
+ spin_unlock(&mpp_paths->hashwlock[hash_idx]);
+ read_unlock(&pathtbl_resize_lock);
+ kfree(new_node);
+err_node_alloc:
+ kfree(new_mpath);
+err_path_alloc:
return err;
}
@@ -243,7 +353,7 @@ void mesh_plink_broken(struct sta_info *sta)
struct mesh_path *mpath;
struct mpath_node *node;
struct hlist_node *p;
- struct net_device *dev = sta->sdata->dev;
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
int i;
rcu_read_lock();
@@ -258,13 +368,12 @@ void mesh_plink_broken(struct sta_info *sta)
spin_unlock_bh(&mpath->state_lock);
mesh_path_error_tx(mpath->dst,
cpu_to_le32(mpath->dsn),
- dev->broadcast, dev);
+ sdata->dev->broadcast, sdata);
} else
spin_unlock_bh(&mpath->state_lock);
}
rcu_read_unlock();
}
-EXPORT_SYMBOL(mesh_plink_broken);
/**
* mesh_path_flush_by_nexthop - Deletes mesh paths if their next hop matches
@@ -287,11 +396,11 @@ void mesh_path_flush_by_nexthop(struct sta_info *sta)
for_each_mesh_entry(mesh_paths, p, node, i) {
mpath = node->mpath;
if (mpath->next_hop == sta)
- mesh_path_del(mpath->dst, mpath->dev);
+ mesh_path_del(mpath->dst, mpath->sdata);
}
}
-void mesh_path_flush(struct net_device *dev)
+void mesh_path_flush(struct ieee80211_sub_if_data *sdata)
{
struct mesh_path *mpath;
struct mpath_node *node;
@@ -300,19 +409,18 @@ void mesh_path_flush(struct net_device *dev)
for_each_mesh_entry(mesh_paths, p, node, i) {
mpath = node->mpath;
- if (mpath->dev == dev)
- mesh_path_del(mpath->dst, mpath->dev);
+ if (mpath->sdata == sdata)
+ mesh_path_del(mpath->dst, mpath->sdata);
}
}
static void mesh_path_node_reclaim(struct rcu_head *rp)
{
struct mpath_node *node = container_of(rp, struct mpath_node, rcu);
- struct ieee80211_sub_if_data *sdata =
- IEEE80211_DEV_TO_SUB_IF(node->mpath->dev);
+ struct ieee80211_sub_if_data *sdata = node->mpath->sdata;
del_timer_sync(&node->mpath->timer);
- atomic_dec(&sdata->u.sta.mpaths);
+ atomic_dec(&sdata->u.mesh.mpaths);
kfree(node->mpath);
kfree(node);
}
@@ -321,11 +429,11 @@ static void mesh_path_node_reclaim(struct rcu_head *rp)
* mesh_path_del - delete a mesh path from the table
*
* @addr: dst address (ETH_ALEN length)
- * @dev: local interface
+ * @sdata: local subif
*
* Returns: 0 if succesful
*/
-int mesh_path_del(u8 *addr, struct net_device *dev)
+int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata)
{
struct mesh_path *mpath;
struct mpath_node *node;
@@ -335,13 +443,13 @@ int mesh_path_del(u8 *addr, struct net_device *dev)
int err = 0;
read_lock(&pathtbl_resize_lock);
- hash_idx = mesh_table_hash(addr, dev, mesh_paths);
+ hash_idx = mesh_table_hash(addr, sdata, mesh_paths);
bucket = &mesh_paths->hash_buckets[hash_idx];
spin_lock(&mesh_paths->hashwlock[hash_idx]);
hlist_for_each_entry(node, n, bucket, list) {
mpath = node->mpath;
- if (mpath->dev == dev &&
+ if (mpath->sdata == sdata &&
memcmp(addr, mpath->dst, ETH_ALEN) == 0) {
spin_lock_bh(&mpath->state_lock);
mpath->flags |= MESH_PATH_RESOLVING;
@@ -381,36 +489,33 @@ void mesh_path_tx_pending(struct mesh_path *mpath)
* mesh_path_discard_frame - discard a frame whose path could not be resolved
*
* @skb: frame to discard
- * @dev: network device the frame was to be sent through
+ * @sdata: network subif the frame was to be sent through
*
* If the frame was beign forwarded from another MP, a PERR frame will be sent
* to the precursor.
*
* Locking: the function must me called within a rcu_read_lock region
*/
-void mesh_path_discard_frame(struct sk_buff *skb, struct net_device *dev)
+void mesh_path_discard_frame(struct sk_buff *skb,
+ struct ieee80211_sub_if_data *sdata)
{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct mesh_path *mpath;
u32 dsn = 0;
- if (skb->pkt_type == PACKET_OTHERHOST) {
- struct ieee80211s_hdr *prev_meshhdr;
- int mshhdrlen;
+ if (memcmp(hdr->addr4, sdata->dev->dev_addr, ETH_ALEN) != 0) {
u8 *ra, *da;
- prev_meshhdr = ((struct ieee80211s_hdr *)skb->cb);
- mshhdrlen = ieee80211_get_mesh_hdrlen(prev_meshhdr);
- da = skb->data;
- ra = MESH_PREQ(skb);
- mpath = mesh_path_lookup(da, dev);
+ da = hdr->addr3;
+ ra = hdr->addr2;
+ mpath = mesh_path_lookup(da, sdata);
if (mpath)
dsn = ++mpath->dsn;
- mesh_path_error_tx(skb->data, cpu_to_le32(dsn), ra, dev);
+ mesh_path_error_tx(skb->data, cpu_to_le32(dsn), ra, sdata);
}
kfree_skb(skb);
- sdata->u.sta.mshstats.dropped_frames_no_route++;
+ sdata->u.mesh.mshstats.dropped_frames_no_route++;
}
/**
@@ -422,14 +527,11 @@ void mesh_path_discard_frame(struct sk_buff *skb, struct net_device *dev)
*/
void mesh_path_flush_pending(struct mesh_path *mpath)
{
- struct ieee80211_sub_if_data *sdata;
struct sk_buff *skb;
- sdata = IEEE80211_DEV_TO_SUB_IF(mpath->dev);
-
while ((skb = skb_dequeue(&mpath->frame_queue)) &&
(mpath->flags & MESH_PATH_ACTIVE))
- mesh_path_discard_frame(skb, mpath->dev);
+ mesh_path_discard_frame(skb, mpath->sdata);
}
/**
@@ -460,39 +562,52 @@ static void mesh_path_node_free(struct hlist_node *p, bool free_leafs)
struct mpath_node *node = hlist_entry(p, struct mpath_node, list);
mpath = node->mpath;
hlist_del_rcu(p);
- synchronize_rcu();
if (free_leafs)
kfree(mpath);
kfree(node);
}
-static void mesh_path_node_copy(struct hlist_node *p, struct mesh_table *newtbl)
+static int mesh_path_node_copy(struct hlist_node *p, struct mesh_table *newtbl)
{
struct mesh_path *mpath;
struct mpath_node *node, *new_node;
u32 hash_idx;
+ new_node = kmalloc(sizeof(struct mpath_node), GFP_ATOMIC);
+ if (new_node == NULL)
+ return -ENOMEM;
+
node = hlist_entry(p, struct mpath_node, list);
mpath = node->mpath;
- new_node = kmalloc(sizeof(struct mpath_node), GFP_KERNEL);
new_node->mpath = mpath;
- hash_idx = mesh_table_hash(mpath->dst, mpath->dev, newtbl);
+ hash_idx = mesh_table_hash(mpath->dst, mpath->sdata, newtbl);
hlist_add_head(&new_node->list,
&newtbl->hash_buckets[hash_idx]);
+ return 0;
}
int mesh_pathtbl_init(void)
{
mesh_paths = mesh_table_alloc(INIT_PATHS_SIZE_ORDER);
+ if (!mesh_paths)
+ return -ENOMEM;
mesh_paths->free_node = &mesh_path_node_free;
mesh_paths->copy_node = &mesh_path_node_copy;
mesh_paths->mean_chain_len = MEAN_CHAIN_LEN;
- if (!mesh_paths)
+
+ mpp_paths = mesh_table_alloc(INIT_PATHS_SIZE_ORDER);
+ if (!mpp_paths) {
+ mesh_table_free(mesh_paths, true);
return -ENOMEM;
+ }
+ mpp_paths->free_node = &mesh_path_node_free;
+ mpp_paths->copy_node = &mesh_path_node_copy;
+ mpp_paths->mean_chain_len = MEAN_CHAIN_LEN;
+
return 0;
}
-void mesh_path_expire(struct net_device *dev)
+void mesh_path_expire(struct ieee80211_sub_if_data *sdata)
{
struct mesh_path *mpath;
struct mpath_node *node;
@@ -501,7 +616,7 @@ void mesh_path_expire(struct net_device *dev)
read_lock(&pathtbl_resize_lock);
for_each_mesh_entry(mesh_paths, p, node, i) {
- if (node->mpath->dev != dev)
+ if (node->mpath->sdata != sdata)
continue;
mpath = node->mpath;
spin_lock_bh(&mpath->state_lock);
@@ -510,7 +625,7 @@ void mesh_path_expire(struct net_device *dev)
time_after(jiffies,
mpath->exp_time + MESH_PATH_EXPIRE)) {
spin_unlock_bh(&mpath->state_lock);
- mesh_path_del(mpath->dst, mpath->dev);
+ mesh_path_del(mpath->dst, mpath->sdata);
} else
spin_unlock_bh(&mpath->state_lock);
}
@@ -520,4 +635,5 @@ void mesh_path_expire(struct net_device *dev)
void mesh_pathtbl_unregister(void)
{
mesh_table_free(mesh_paths, true);
+ mesh_table_free(mpp_paths, true);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 15:30:40 +0000