Release 4.11 net/mac80211/mesh_pathtbl.c
/*
* Copyright (c) 2008, 2009 open80211s Ltd.
* Author: Luis Carlos Cobo <luisca@cozybit.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/etherdevice.h>
#include <linux/list.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <net/mac80211.h>
#include "wme.h"
#include "ieee80211_i.h"
#include "mesh.h"
static void mesh_path_free_rcu(struct mesh_table *tbl, struct mesh_path *mpath);
static u32 mesh_table_hash(const void *addr, u32 len, u32 seed)
{
/* Use last four bytes of hw addr as hash index */
return jhash_1word(*(u32 *)(addr+2), seed);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 35 | 100.00% | 1 | 100.00% |
Total | 35 | 100.00% | 1 | 100.00% |
static const struct rhashtable_params mesh_rht_params = {
.nelem_hint = 2,
.automatic_shrinking = true,
.key_len = ETH_ALEN,
.key_offset = offsetof(struct mesh_path, dst),
.head_offset = offsetof(struct mesh_path, rhash),
.hashfn = mesh_table_hash,
};
static inline bool mpath_expired(struct mesh_path *mpath)
{
return (mpath->flags & MESH_PATH_ACTIVE) &&
time_after(jiffies, mpath->exp_time) &&
!(mpath->flags & MESH_PATH_FIXED);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 36 | 92.31% | 1 | 50.00% |
Luis Carlos Cobo Rus | 3 | 7.69% | 1 | 50.00% |
Total | 39 | 100.00% | 2 | 100.00% |
static void mesh_path_rht_free(void *ptr, void *tblptr)
{
struct mesh_path *mpath = ptr;
struct mesh_table *tbl = tblptr;
mesh_path_free_rcu(tbl, mpath);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 28 | 80.00% | 3 | 60.00% |
Henning Rogge | 4 | 11.43% | 1 | 20.00% |
Johannes Berg | 3 | 8.57% | 1 | 20.00% |
Total | 35 | 100.00% | 5 | 100.00% |
static struct mesh_table *mesh_table_alloc(void)
{
struct mesh_table *newtbl;
newtbl = kmalloc(sizeof(struct mesh_table), GFP_ATOMIC);
if (!newtbl)
return NULL;
INIT_HLIST_HEAD(&newtbl->known_gates);
atomic_set(&newtbl->entries, 0);
spin_lock_init(&newtbl->gates_lock);
return newtbl;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 49 | 75.38% | 1 | 25.00% |
Bob Copeland | 15 | 23.08% | 2 | 50.00% |
Javier Cardona | 1 | 1.54% | 1 | 25.00% |
Total | 65 | 100.00% | 4 | 100.00% |
static void mesh_table_free(struct mesh_table *tbl)
{
rhashtable_free_and_destroy(&tbl->rhead,
mesh_path_rht_free, tbl);
kfree(tbl);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Javier Cardona | 20 | 71.43% | 1 | 33.33% |
Bob Copeland | 8 | 28.57% | 2 | 66.67% |
Total | 28 | 100.00% | 3 | 100.00% |
/**
*
* mesh_path_assign_nexthop - update mesh path next hop
*
* @mpath: mesh path to update
* @sta: next hop to assign
*
* Locking: mpath->state_lock must be held when calling this function
*/
void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta)
{
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
unsigned long flags;
rcu_assign_pointer(mpath->next_hop, sta);
spin_lock_irqsave(&mpath->frame_queue.lock, flags);
skb_queue_walk(&mpath->frame_queue, skb) {
hdr = (struct ieee80211_hdr *) skb->data;
memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
memcpy(hdr->addr2, mpath->sdata->vif.addr, ETH_ALEN);
ieee80211_mps_set_frame_flags(sta->sdata, sta, hdr);
}
spin_unlock_irqrestore(&mpath->frame_queue.lock, flags);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 90 | 72.58% | 2 | 50.00% |
Javier Cardona | 34 | 27.42% | 2 | 50.00% |
Total | 124 | 100.00% | 4 | 100.00% |
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->addr2, gate_mpath->sdata->vif.addr, ETH_ALEN);
memcpy(hdr->addr3, dst_addr, ETH_ALEN);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 139 | 56.97% | 1 | 11.11% |
Javier Cardona | 86 | 35.25% | 4 | 44.44% |
Johannes Berg | 9 | 3.69% | 2 | 22.22% |
Luis Carlos Cobo Rus | 9 | 3.69% | 1 | 11.11% |
Thomas Pedersen | 1 | 0.41% | 1 | 11.11% |
Total | 244 | 100.00% | 9 | 100.00% |
/**
*
* 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, *fskb, *tmp;
struct sk_buff_head failq;
unsigned long flags;
if (WARN_ON(gate_mpath == from_mpath))
return;
if (WARN_ON(!gate_mpath->next_hop))
return;
__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);
skb_queue_walk_safe(&failq, fskb, tmp) {
if (skb_queue_len(&gate_mpath->frame_queue) >=
MESH_FRAME_QUEUE_LEN) {
mpath_dbg(gate_mpath->sdata, "mpath queue full!\n");
break;
}
skb = skb_copy(fskb, GFP_ATOMIC);
if (WARN_ON(!skb))
break;
prepare_for_gate(skb, gate_mpath->dst, gate_mpath);
skb_queue_tail(&gate_mpath->frame_queue, skb);
if (copy)
continue;
__skb_unlink(fskb, &failq);
kfree_skb(fskb);
}
mpath_dbg(gate_mpath->sdata, "Mpath queue for gate %pM has %d frames\n",
gate_mpath->dst, skb_queue_len(&gate_mpath->frame_queue));
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 187 | 73.91% | 3 | 37.50% |
Li YanBo | 28 | 11.07% | 1 | 12.50% |
Henning Rogge | 19 | 7.51% | 1 | 12.50% |
Javier Cardona | 17 | 6.72% | 1 | 12.50% |
Johannes Berg | 2 | 0.79% | 2 | 25.00% |
Total | 253 | 100.00% | 8 | 100.00% |
static struct mesh_path *mpath_lookup(struct mesh_table *tbl, const u8 *dst,
struct ieee80211_sub_if_data *sdata)
{
struct mesh_path *mpath;
mpath = rhashtable_lookup_fast(&tbl->rhead, dst, mesh_rht_params);
if (mpath && mpath_expired(mpath)) {
spin_lock_bh(&mpath->state_lock);
mpath->flags &= ~MESH_PATH_ACTIVE;
spin_unlock_bh(&mpath->state_lock);
}
return mpath;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 51 | 64.56% | 2 | 33.33% |
Luis Carlos Cobo Rus | 10 | 12.66% | 2 | 33.33% |
Javier Cardona | 10 | 12.66% | 1 | 16.67% |
Li YanBo | 8 | 10.13% | 1 | 16.67% |
Total | 79 | 100.00% | 6 | 100.00% |
/**
* mesh_path_lookup - look up a path in the mesh path table
* @sdata: local subif
* @dst: hardware address (ETH_ALEN length) of destination
*
* 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(struct ieee80211_sub_if_data *sdata, const u8 *dst)
{
return mpath_lookup(sdata->u.mesh.mesh_paths, dst, sdata);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 23 | 69.70% | 1 | 33.33% |
Javier Cardona | 8 | 24.24% | 1 | 33.33% |
Li YanBo | 2 | 6.06% | 1 | 33.33% |
Total | 33 | 100.00% | 3 | 100.00% |
struct mesh_path *
mpp_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
{
return mpath_lookup(sdata->u.mesh.mpp_paths, dst, sdata);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 17 | 51.52% | 1 | 33.33% |
Javier Cardona | 12 | 36.36% | 1 | 33.33% |
Li YanBo | 4 | 12.12% | 1 | 33.33% |
Total | 33 | 100.00% | 3 | 100.00% |
static struct mesh_path *
__mesh_path_lookup_by_idx(struct mesh_table *tbl, int idx)
{
int i = 0, ret;
struct mesh_path *mpath = NULL;
struct rhashtable_iter iter;
ret = rhashtable_walk_init(&tbl->rhead, &iter, GFP_ATOMIC);
if (ret)
return NULL;
ret = rhashtable_walk_start(&iter);
if (ret && ret != -EAGAIN)
goto err;
while ((mpath = rhashtable_walk_next(&iter))) {
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
continue;
if (IS_ERR(mpath))
break;
if (i++ == idx)
break;
}
err:
rhashtable_walk_stop(&iter);
rhashtable_walk_exit(&iter);
if (IS_ERR(mpath) || !mpath)
return NULL;
if (mpath_expired(mpath)) {
spin_lock_bh(&mpath->state_lock);
mpath->flags &= ~MESH_PATH_ACTIVE;
spin_unlock_bh(&mpath->state_lock);
}
return mpath;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 184 | 100.00% | 2 | 100.00% |
Total | 184 | 100.00% | 2 | 100.00% |
/**
* mesh_path_lookup_by_idx - look up a path in the mesh path table by its index
* @idx: index
* @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(struct ieee80211_sub_if_data *sdata, int idx)
{
return __mesh_path_lookup_by_idx(sdata->u.mesh.mesh_paths, idx);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 21 | 72.41% | 2 | 50.00% |
Li YanBo | 7 | 24.14% | 1 | 25.00% |
Johannes Berg | 1 | 3.45% | 1 | 25.00% |
Total | 29 | 100.00% | 4 | 100.00% |
/**
* mpp_path_lookup_by_idx - look up a path in the proxy path table by its index
* @idx: index
* @sdata: local subif, or NULL for all entries
*
* Returns: pointer to the proxy path structure, or NULL if not found.
*
* Locking: must be called within a read rcu section.
*/
struct mesh_path *
mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
{
return __mesh_path_lookup_by_idx(sdata->u.mesh.mpp_paths, idx);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 22 | 75.86% | 1 | 33.33% |
Javier Cardona | 6 | 20.69% | 1 | 33.33% |
Li YanBo | 1 | 3.45% | 1 | 33.33% |
Total | 29 | 100.00% | 3 | 100.00% |
/**
* 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)
{
struct mesh_table *tbl;
int err;
rcu_read_lock();
tbl = mpath->sdata->u.mesh.mesh_paths;
spin_lock_bh(&mpath->state_lock);
if (mpath->is_gate) {
err = -EEXIST;
spin_unlock_bh(&mpath->state_lock);
goto err_rcu;
}
mpath->is_gate = true;
mpath->sdata->u.mesh.num_gates++;
spin_lock(&tbl->gates_lock);
hlist_add_head_rcu(&mpath->gate_list, &tbl->known_gates);
spin_unlock(&tbl->gates_lock);
spin_unlock_bh(&mpath->state_lock);
mpath_dbg(mpath->sdata,
"Mesh path: Recorded new gate: %pM. %d known gates\n",
mpath->dst, mpath->sdata->u.mesh.num_gates);
err = 0;
err_rcu:
rcu_read_unlock();
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 130 | 84.42% | 4 | 57.14% |
Li YanBo | 22 | 14.29% | 1 | 14.29% |
Johannes Berg | 2 | 1.30% | 2 | 28.57% |
Total | 154 | 100.00% | 7 | 100.00% |
/**
* 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
*/
static void mesh_gate_del(struct mesh_table *tbl, struct mesh_path *mpath)
{
lockdep_assert_held(&mpath->state_lock);
if (!mpath->is_gate)
return;
mpath->is_gate = false;
spin_lock_bh(&tbl->gates_lock);
hlist_del_rcu(&mpath->gate_list);
mpath->sdata->u.mesh.num_gates--;
spin_unlock_bh(&tbl->gates_lock);
mpath_dbg(mpath->sdata,
"Mesh path: Deleted gate: %pM. %d known gates\n",
mpath->dst, mpath->sdata->u.mesh.num_gates);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 63 | 65.62% | 3 | 42.86% |
Li YanBo | 20 | 20.83% | 1 | 14.29% |
Javier Cardona | 11 | 11.46% | 1 | 14.29% |
Johannes Berg | 2 | 2.08% | 2 | 28.57% |
Total | 96 | 100.00% | 7 | 100.00% |
/**
* 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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 19 | 100.00% | 2 | 100.00% |
Total | 19 | 100.00% | 2 | 100.00% |
static
struct mesh_path *mesh_path_new(struct ieee80211_sub_if_data *sdata,
const u8 *dst, gfp_t gfp_flags)
{
struct mesh_path *new_mpath;
new_mpath = kzalloc(sizeof(struct mesh_path), gfp_flags);
if (!new_mpath)
return NULL;
memcpy(new_mpath->dst, dst, ETH_ALEN);
eth_broadcast_addr(new_mpath->rann_snd_addr);
new_mpath->is_root = false;
new_mpath->sdata = sdata;
new_mpath->flags = 0;
skb_queue_head_init(&new_mpath->frame_queue);
new_mpath->timer.data = (unsigned long) new_mpath;
new_mpath->timer.function = mesh_path_timer;
new_mpath->exp_time = jiffies;
spin_lock_init(&new_mpath->state_lock);
init_timer(&new_mpath->timer);
return new_mpath;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 120 | 88.24% | 3 | 60.00% |
Javier Cardona | 10 | 7.35% | 1 | 20.00% |
Johannes Berg | 6 | 4.41% | 1 | 20.00% |
Total | 136 | 100.00% | 5 | 100.00% |
/**
* mesh_path_add - allocate and add a new path to the mesh path table
* @dst: destination address of the path (ETH_ALEN length)
* @sdata: local subif
*
* Returns: 0 on success
*
* State: the initial state of the new path is set to 0
*/
struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata,
const u8 *dst)
{
struct mesh_table *tbl;
struct mesh_path *mpath, *new_mpath;
int ret;
if (ether_addr_equal(dst, sdata->vif.addr))
/* never add ourselves as neighbours */
return ERR_PTR(-ENOTSUPP);
if (is_multicast_ether_addr(dst))
return ERR_PTR(-ENOTSUPP);
if (atomic_add_unless(&sdata->u.mesh.mpaths, 1, MESH_MAX_MPATHS) == 0)
return ERR_PTR(-ENOSPC);
new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
if (!new_mpath)
return ERR_PTR(-ENOMEM);
tbl = sdata->u.mesh.mesh_paths;
do {
ret = rhashtable_lookup_insert_fast(&tbl->rhead,
&new_mpath->rhash,
mesh_rht_params);
if (ret == -EEXIST)
mpath = rhashtable_lookup_fast(&tbl->rhead,
dst,
mesh_rht_params);
} while (unlikely(ret == -EEXIST && !mpath));
if (ret && ret != -EEXIST)
return ERR_PTR(ret);
/* At this point either new_mpath was added, or we found a
* matching entry already in the table; in the latter case
* free the unnecessary new entry.
*/
if (ret == -EEXIST) {
kfree(new_mpath);
new_mpath = mpath;
}
sdata->u.mesh.mesh_paths_generation++;
return new_mpath;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 180 | 78.60% | 2 | 25.00% |
Javier Cardona | 24 | 10.48% | 3 | 37.50% |
Li YanBo | 16 | 6.99% | 1 | 12.50% |
Luis Carlos Cobo Rus | 7 | 3.06% | 1 | 12.50% |
Johannes Berg | 2 | 0.87% | 1 | 12.50% |
Total | 229 | 100.00% | 8 | 100.00% |
int mpp_path_add(struct ieee80211_sub_if_data *sdata,
const u8 *dst, const u8 *mpp)
{
struct mesh_table *tbl;
struct mesh_path *new_mpath;
int ret;
if (ether_addr_equal(dst, sdata->vif.addr))
/* never add ourselves as neighbours */
return -ENOTSUPP;
if (is_multicast_ether_addr(dst))
return -ENOTSUPP;
new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
if (!new_mpath)
return -ENOMEM;
memcpy(new_mpath->mpp, mpp, ETH_ALEN);
tbl = sdata->u.mesh.mpp_paths;
ret = rhashtable_lookup_insert_fast(&tbl->rhead,
&new_mpath->rhash,
mesh_rht_params);
sdata->u.mesh.mpp_paths_generation++;
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Luis Carlos Cobo Rus | 51 | 38.64% | 1 | 8.33% |
Bob Copeland | 37 | 28.03% | 3 | 25.00% |
Johannes Berg | 17 | 12.88% | 3 | 25.00% |
Li YanBo | 15 | 11.36% | 1 | 8.33% |
Pavel Emelyanov | 6 | 4.55% | 1 | 8.33% |
Jasper Bryant-Greene | 4 | 3.03% | 1 | 8.33% |
Joe Perches | 1 | 0.76% | 1 | 8.33% |
Javier Cardona | 1 | 0.76% | 1 | 8.33% |
Total | 132 | 100.00% | 12 | 100.00% |
/**
* mesh_plink_broken - deactivates paths and sends perr when a link breaks
*
* @sta: broken peer link
*
* This function must be called from the rate control algorithm if enough
* delivery errors suggest that a peer link is no longer usable.
*/
void mesh_plink_broken(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
static const u8 bcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
struct mesh_path *mpath;
struct rhashtable_iter iter;
int ret;
ret = rhashtable_walk_init(&tbl->rhead, &iter, GFP_ATOMIC);
if (ret)
return;
ret = rhashtable_walk_start(&iter);
if (ret && ret != -EAGAIN)
goto out;
while ((mpath = rhashtable_walk_next(&iter))) {
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
continue;
if (IS_ERR(mpath))
break;
if (rcu_access_pointer(mpath->next_hop) == sta &&
mpath->flags & MESH_PATH_ACTIVE &&
!(mpath->flags & MESH_PATH_FIXED)) {
spin_lock_bh(&mpath->state_lock);
mpath->flags &= ~MESH_PATH_ACTIVE;
++mpath->sn;
spin_unlock_bh(&mpath->state_lock);
mesh_path_error_tx(sdata,
sdata->u.mesh.mshcfg.element_ttl,
mpath->dst, mpath->sn,
WLAN_REASON_MESH_PATH_DEST_UNREACHABLE, bcast);
}
}
out:
rhashtable_walk_stop(&iter);
rhashtable_walk_exit(&iter);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 95 | 39.42% | 2 | 15.38% |
Luis Carlos Cobo Rus | 79 | 32.78% | 1 | 7.69% |
Johannes Berg | 36 | 14.94% | 3 | 23.08% |
Javier Cardona | 25 | 10.37% | 3 | 23.08% |
Rui Paulo | 4 | 1.66% | 2 | 15.38% |
Chun-Yeow Yeoh | 1 | 0.41% | 1 | 7.69% |
Andreea-Cristina Bernat | 1 | 0.41% | 1 | 7.69% |
Total | 241 | 100.00% | 13 | 100.00% |
static void mesh_path_free_rcu(struct mesh_table *tbl,
struct mesh_path *mpath)
{
struct ieee80211_sub_if_data *sdata = mpath->sdata;
spin_lock_bh(&mpath->state_lock);
mpath->flags |= MESH_PATH_RESOLVING | MESH_PATH_DELETED;
mesh_gate_del(tbl, mpath);
spin_unlock_bh(&mpath->state_lock);
del_timer_sync(&mpath->timer);
atomic_dec(&sdata->u.mesh.mpaths);
atomic_dec(&tbl->entries);
kfree_rcu(mpath, rcu);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Javier Cardona | 52 | 57.14% | 1 | 20.00% |
Johannes Berg | 20 | 21.98% | 1 | 20.00% |
Bob Copeland | 19 | 20.88% | 3 | 60.00% |
Total | 91 | 100.00% | 5 | 100.00% |
static void __mesh_path_del(struct mesh_table *tbl, struct mesh_path *mpath)
{
rhashtable_remove_fast(&tbl->rhead, &mpath->rhash, mesh_rht_params);
mesh_path_free_rcu(tbl, mpath);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 37 | 97.37% | 1 | 50.00% |
Javier Cardona | 1 | 2.63% | 1 | 50.00% |
Total | 38 | 100.00% | 2 | 100.00% |
/**
* mesh_path_flush_by_nexthop - Deletes mesh paths if their next hop matches
*
* @sta: mesh peer to match
*
* RCU notes: this function is called when a mesh plink transitions from
* PLINK_ESTAB to any other state, since PLINK_ESTAB state is the only one that
* allows path creation. This will happen before the sta can be freed (because
* sta_info_destroy() calls this) so any reader in a rcu read block will be
* protected against the plink disappearing.
*/
void mesh_path_flush_by_nexthop(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
struct mesh_path *mpath;
struct rhashtable_iter iter;
int ret;
ret = rhashtable_walk_init(&tbl->rhead, &iter, GFP_ATOMIC);
if (ret)
return;
ret = rhashtable_walk_start(&iter);
if (ret && ret != -EAGAIN)
goto out;
while ((mpath = rhashtable_walk_next(&iter))) {
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
continue;
if (IS_ERR(mpath))
break;
if (rcu_access_pointer(mpath->next_hop) == sta)
__mesh_path_del(tbl, mpath);
}
out:
rhashtable_walk_stop(&iter);
rhashtable_walk_exit(&iter);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 96 | 62.34% | 2 | 22.22% |
Luis Carlos Cobo Rus | 38 | 24.68% | 2 | 22.22% |
Johannes Berg | 10 | 6.49% | 1 | 11.11% |
Javier Cardona | 9 | 5.84% | 3 | 33.33% |
Andreea-Cristina Bernat | 1 | 0.65% | 1 | 11.11% |
Total | 154 | 100.00% | 9 | 100.00% |
static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
const u8 *proxy)
{
struct mesh_table *tbl = sdata->u.mesh.mpp_paths;
struct mesh_path *mpath;
struct rhashtable_iter iter;
int ret;
ret = rhashtable_walk_init(&tbl->rhead, &iter, GFP_ATOMIC);
if (ret)
return;
ret = rhashtable_walk_start(&iter);
if (ret && ret != -EAGAIN)
goto out;
while ((mpath = rhashtable_walk_next(&iter))) {
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
continue;
if (IS_ERR(mpath))
break;
if (ether_addr_equal(mpath->mpp, proxy))
__mesh_path_del(tbl, mpath);
}
out:
rhashtable_walk_stop(&iter);
rhashtable_walk_exit(&iter);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 88 | 58.28% | 2 | 66.67% |
Henning Rogge | 63 | 41.72% | 1 | 33.33% |
Total | 151 | 100.00% | 3 | 100.00% |
static void table_flush_by_iface(struct mesh_table *tbl)
{
struct mesh_path *mpath;
struct rhashtable_iter iter;
int ret;
ret = rhashtable_walk_init(&tbl->rhead, &iter, GFP_ATOMIC);
if (ret)
return;
ret = rhashtable_walk_start(&iter);
if (ret && ret != -EAGAIN)
goto out;
while ((mpath = rhashtable_walk_next(&iter))) {
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
continue;
if (IS_ERR(mpath))
break;
__mesh_path_del(tbl, mpath);
}
out:
rhashtable_walk_stop(&iter);
rhashtable_walk_exit(&iter);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 88 | 72.13% | 1 | 20.00% |
Luis Carlos Cobo Rus | 20 | 16.39% | 1 | 20.00% |
Javier Cardona | 12 | 9.84% | 2 | 40.00% |
Johannes Berg | 2 | 1.64% | 1 | 20.00% |
Total | 122 | 100.00% | 5 | 100.00% |
/**
* mesh_path_flush_by_iface - Deletes all mesh paths associated with a given iface
*
* This function deletes both mesh paths as well as mesh portal paths.
*
* @sdata: interface data to match
*
*/
void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
{
table_flush_by_iface(sdata->u.mesh.mesh_paths);
table_flush_by_iface(sdata->u.mesh.mpp_paths);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Bob Copeland | 16 | 50.00% | 2 | 33.33% |
Luis Carlos Cobo Rus | 11 | 34.38% | 2 | 33.33% |
Javier Cardona | 5 | 15.62% | 2 | 33.33% |
Total | 32 | 100.00% | 6 | 100.00% |
/**
* table_path_del - delete a path from the mesh or mpp table
*
* @tbl: mesh or mpp path table
* @sdata: local subif
* @addr: dst address (ETH_ALEN length)
*
* Returns: 0 if successful
*/
static int table_path_del(struct mesh_table *tbl,
struct ieee80211_sub_if_data *sdata,
const u8 *addr)
{
struct mesh_path *mpath;
rcu_read_lock();
mpath = rhashtable_lookup_fast(&tbl->rhead, addr, mesh_rht_params);
if (!mpath) {
rcu_read_unlock();
return -ENXIO