redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

This feature patchset includes the following changes (mostly 

chronological order):
 
  - bump version strings, by Simon Wunderlich
 
  - kerneldoc clean up, by Sven Eckelmann
 
  - enable RTNL automatic loading and according documentation
    changes, by Sven Eckelmann (2 patches)
 
  - fix/improve interface removal and associated locking, by
    Sven Eckelmann (3 patches)
 
  - clean up unused variables, by Linus Luessing
 
  - implement Gateway selection code for B.A.T.M.A.N. V by
    Antonio Quartulli (4 patches)
 
  - rewrite TQ comparison by Markus Pargmann
 
  - fix Cocinelle warnings on bool vs integers (by Fenguang Wu/Intels
    kbuild test robot) and bitwise arithmetic operations (by Linus
    Luessing)
 
  - rewrite packet creation for forwarding for readability and to avoid
    reference count mistakes, by Linus Luessing
 
  - use kmem_cache for translation table, which results in more efficient
    storing of translation table entries, by Sven Eckelmann
 
  - rewrite/clarify reference handling for send_skb_unicast, by Sven
    Eckelmann
 
  - fix debug messages when updating routes, by Sven Eckelmann
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABCgAGBQJXrY1iAAoJEKEr45hCkp6hqjsP/1GI9Mm9iHGE5s4jY9+JORkn
 yR57i0l8IENLtQ2jrxu48VtyBKI5gQoitftRpAMZw5iUjgWXVTzA8/ik1Hy7VHnG
 NkDRAwHG/XH0peoubQGGPNbX2pZzBDnjR3wC9/8rOk/q6VqVqcLtgyHKbJFS5hd7
 dW3okXqKCZhJcTFnu95i7PZ9zTB7BrHEqcu9aDuA6VHdf4HF9ndCizP9bdnRCOVr
 wR1CkCrSjt2pMqRPLDAFcHzq/Lr+4LsNwodO0zqK5yetysJNaFJ7j5nTle2REk4L
 V2Wvbmyzxa8MznRphisYM+UJ12BxVjwmuilVoxgeu/FmfCpopA1L7lbWf+xxtAcP
 VLegLq2BG3fqkG6Pvk8emabC6oDxZaHsFV6uC4HylzLy09mCKWuap0qtgvNFjloM
 ntdYail5BFFsTq9j7KK7k4cfYikeLfmd3/j7F/ok+PJXGpAHKqOsfRABV61rxELH
 era8GrQmllh1UA/KX7j6rS4DK+AjaXmh+nk6+KDrd6IKo4+hZ1dg3UHB+ytrnx+6
 p0BoLgUnjBvNT44LsjtUZlt+3ILUspJWfb86kBgTFuZm8rJqulrJu6qDbmBZEayb
 PPrubxjYSKxR0nMlOVTBsGmNjugQIGn0ku89HKD210YZlpfnYENxwsxtYucWK/Tm
 AvwINRUXfumyJIZ385BQ
 =6XUi
 -----END PGP SIGNATURE-----

Merge tag 'batadv-next-for-davem-20160812' of git://git.open-mesh.org/linux-merge

Simon Wunderlich says:

====================
This feature patchset includes the following changes (mostly
chronological order):

 - bump version strings, by Simon Wunderlich

 - kerneldoc clean up, by Sven Eckelmann

 - enable RTNL automatic loading and according documentation
   changes, by Sven Eckelmann (2 patches)

 - fix/improve interface removal and associated locking, by
   Sven Eckelmann (3 patches)

 - clean up unused variables, by Linus Luessing

 - implement Gateway selection code for B.A.T.M.A.N. V by
   Antonio Quartulli (4 patches)

 - rewrite TQ comparison by Markus Pargmann

 - fix Cocinelle warnings on bool vs integers (by Fenguang Wu/Intels
   kbuild test robot) and bitwise arithmetic operations (by Linus
   Luessing)

 - rewrite packet creation for forwarding for readability and to avoid
   reference count mistakes, by Linus Luessing

 - use kmem_cache for translation table, which results in more efficient
   storing of translation table entries, by Sven Eckelmann

 - rewrite/clarify reference handling for send_skb_unicast, by Sven
   Eckelmann

 - fix debug messages when updating routes, by Sven Eckelmann
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
David S. Miller 2016-08-12 20:55:41 -07:00
parent 85be21bd69 b5dcbad252
commit f9f9ab1726
19 changed files with 1104 additions and 460 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Documentation/networking/batman-adv.txt
View File

@ -43,10 +43,15 @@ new interfaces to verify the compatibility. There is no need to
reload the module if you plug your USB wifi adapter into your ma-
chine after batman advanced was initially loaded.
To activate a given interface simply write "bat0" into its
"mesh_iface" file inside the batman_adv subfolder:
The batman-adv soft-interface can be created using the iproute2
tool "ip"
# echo bat0 > /sys/class/net/eth0/batman_adv/mesh_iface
# ip link add name bat0 type batadv
To activate a given interface simply attach it to the "bat0"
interface
# ip link set dev eth0 master bat0
Repeat this step for all interfaces you wish to add. Now batman
starts using/broadcasting on this/these interface(s).
@ -56,10 +61,10 @@ By reading the "iface_status" file you can check its status:
# cat /sys/class/net/eth0/batman_adv/iface_status
# active
To deactivate an interface you have to write "none" into its
"mesh_iface" file:
To deactivate an interface you have to detach it from the
"bat0" interface:
# echo none > /sys/class/net/eth0/batman_adv/mesh_iface
# ip link set dev eth0 nomaster
All mesh wide settings can be found in batman's own interface

371
net/batman-adv/bat_iv_ogm.c
View File

@ -51,6 +51,7 @@
#include "bat_algo.h"
#include "bitarray.h"
#include "gateway_client.h"
#include "hard-interface.h"
#include "hash.h"
#include "log.h"
@ -528,36 +529,25 @@ static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet,
static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet)
{
struct net_device *soft_iface;
struct batadv_priv *bat_priv;
struct batadv_hard_iface *primary_if = NULL;
if (!forw_packet->if_incoming) {
pr_err("Error - can't forward packet: incoming iface not specified\n");
goto out;
return;
}
soft_iface = forw_packet->if_incoming->soft_iface;
bat_priv = netdev_priv(soft_iface);
if (WARN_ON(!forw_packet->if_outgoing))
goto out;
return;
if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface))
goto out;
return;
if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE)
goto out;
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
return;
/* only for one specific outgoing interface */
batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing);
out:
if (primary_if)
batadv_hardif_put(primary_if);
}
/**
@ -685,19 +675,12 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
struct batadv_forw_packet *forw_packet_aggr;
unsigned char *skb_buff;
unsigned int skb_size;
atomic_t *queue_left = own_packet ? NULL : &bat_priv->batman_queue_left;
/* own packet should always be scheduled */
if (!own_packet) {
if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"batman packet queue full\n");
return;
}
}
forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC);
forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing,
queue_left, bat_priv);
if (!forw_packet_aggr)
goto out_nomem;
return;
if (atomic_read(&bat_priv->aggregated_ogms) &&
packet_len < BATADV_MAX_AGGREGATION_BYTES)
@ -708,8 +691,11 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
skb_size += ETH_HLEN;
forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size);
if (!forw_packet_aggr->skb)
goto out_free_forw_packet;
if (!forw_packet_aggr->skb) {
batadv_forw_packet_free(forw_packet_aggr);
return;
}
forw_packet_aggr->skb->priority = TC_PRIO_CONTROL;
skb_reserve(forw_packet_aggr->skb, ETH_HLEN);
@ -717,12 +703,7 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
forw_packet_aggr->packet_len = packet_len;
memcpy(skb_buff, packet_buff, packet_len);
kref_get(&if_incoming->refcount);
kref_get(&if_outgoing->refcount);
forw_packet_aggr->own = own_packet;
forw_packet_aggr->if_incoming = if_incoming;
forw_packet_aggr->if_outgoing = if_outgoing;
forw_packet_aggr->num_packets = 0;
forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS;
forw_packet_aggr->send_time = send_time;
@ -741,13 +722,6 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
queue_delayed_work(batadv_event_workqueue,
&forw_packet_aggr->delayed_work,
send_time - jiffies);
return;
out_free_forw_packet:
kfree(forw_packet_aggr);
out_nomem:
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
}
/* aggregate a new packet into the existing ogm packet */
@ -1830,10 +1804,6 @@ static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work)
batadv_iv_ogm_schedule(forw_packet->if_incoming);
out:
/* don't count own packet */
if (!forw_packet->own)
atomic_inc(&bat_priv->batman_queue_left);
batadv_forw_packet_free(forw_packet);
}
@ -2028,6 +1998,51 @@ static void batadv_iv_neigh_print(struct batadv_priv *bat_priv,
seq_puts(seq, "No batman nodes in range ...\n");
}
/**
* batadv_iv_ogm_neigh_diff - calculate tq difference of two neighbors
* @neigh1: the first neighbor object of the comparison
* @if_outgoing1: outgoing interface for the first neighbor
* @neigh2: the second neighbor object of the comparison
* @if_outgoing2: outgoing interface for the second neighbor
* @diff: pointer to integer receiving the calculated difference
*
* The content of *@diff is only valid when this function returns true.
* It is less, equal to or greater than 0 if the metric via neigh1 is lower,
* the same as or higher than the metric via neigh2
*
* Return: true when the difference could be calculated, false otherwise
*/
static bool batadv_iv_ogm_neigh_diff(struct batadv_neigh_node *neigh1,
struct batadv_hard_iface *if_outgoing1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2,
int *diff)
{
struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo;
u8 tq1, tq2;
bool ret = true;
neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
if (!neigh1_ifinfo || !neigh2_ifinfo) {
ret = false;
goto out;
}
tq1 = neigh1_ifinfo->bat_iv.tq_avg;
tq2 = neigh2_ifinfo->bat_iv.tq_avg;
*diff = (int)tq1 - (int)tq2;
out:
if (neigh1_ifinfo)
batadv_neigh_ifinfo_put(neigh1_ifinfo);
if (neigh2_ifinfo)
batadv_neigh_ifinfo_put(neigh2_ifinfo);
return ret;
}
/**
* batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors
* @neigh1: the first neighbor object of the comparison
@ -2043,27 +2058,13 @@ static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2)
{
struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo;
u8 tq1, tq2;
bool ret;
int diff;
neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
if (!neigh1_ifinfo || !neigh2_ifinfo) {
diff = 0;
goto out;
}
tq1 = neigh1_ifinfo->bat_iv.tq_avg;
tq2 = neigh2_ifinfo->bat_iv.tq_avg;
diff = tq1 - tq2;
out:
if (neigh1_ifinfo)
batadv_neigh_ifinfo_put(neigh1_ifinfo);
if (neigh2_ifinfo)
batadv_neigh_ifinfo_put(neigh2_ifinfo);
ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2,
if_outgoing2, &diff);
if (!ret)
return 0;
return diff;
}
@ -2085,29 +2086,15 @@ batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2)
{
struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo;
u8 tq1, tq2;
bool ret;
int diff;
neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
/* we can't say that the metric is better */
if (!neigh1_ifinfo || !neigh2_ifinfo) {
ret = false;
goto out;
}
tq1 = neigh1_ifinfo->bat_iv.tq_avg;
tq2 = neigh2_ifinfo->bat_iv.tq_avg;
ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD;
out:
if (neigh1_ifinfo)
batadv_neigh_ifinfo_put(neigh1_ifinfo);
if (neigh2_ifinfo)
batadv_neigh_ifinfo_put(neigh2_ifinfo);
ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2,
if_outgoing2, &diff);
if (!ret)
return false;
ret = diff > -BATADV_TQ_SIMILARITY_THRESHOLD;
return ret;
}
@ -2117,6 +2104,219 @@ static void batadv_iv_iface_activate(struct batadv_hard_iface *hard_iface)
batadv_iv_ogm_schedule(hard_iface);
}
static struct batadv_gw_node *
batadv_iv_gw_get_best_gw_node(struct batadv_priv *bat_priv)
{
struct batadv_neigh_node *router;
struct batadv_neigh_ifinfo *router_ifinfo;
struct batadv_gw_node *gw_node, *curr_gw = NULL;
u64 max_gw_factor = 0;
u64 tmp_gw_factor = 0;
u8 max_tq = 0;
u8 tq_avg;
struct batadv_orig_node *orig_node;
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
orig_node = gw_node->orig_node;
router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
if (!router)
continue;
router_ifinfo = batadv_neigh_ifinfo_get(router,
BATADV_IF_DEFAULT);
if (!router_ifinfo)
goto next;
if (!kref_get_unless_zero(&gw_node->refcount))
goto next;
tq_avg = router_ifinfo->bat_iv.tq_avg;
switch (atomic_read(&bat_priv->gw.sel_class)) {
case 1: /* fast connection */
tmp_gw_factor = tq_avg * tq_avg;
tmp_gw_factor *= gw_node->bandwidth_down;
tmp_gw_factor *= 100 * 100;
tmp_gw_factor >>= 18;
if ((tmp_gw_factor > max_gw_factor) ||
((tmp_gw_factor == max_gw_factor) &&
(tq_avg > max_tq))) {
if (curr_gw)
batadv_gw_node_put(curr_gw);
curr_gw = gw_node;
kref_get(&curr_gw->refcount);
}
break;
default: /* 2: stable connection (use best statistic)
* 3: fast-switch (use best statistic but change as
* soon as a better gateway appears)
* XX: late-switch (use best statistic but change as
* soon as a better gateway appears which has
* $routing_class more tq points)
*/
if (tq_avg > max_tq) {
if (curr_gw)
batadv_gw_node_put(curr_gw);
curr_gw = gw_node;
kref_get(&curr_gw->refcount);
}
break;
}
if (tq_avg > max_tq)
max_tq = tq_avg;
if (tmp_gw_factor > max_gw_factor)
max_gw_factor = tmp_gw_factor;
batadv_gw_node_put(gw_node);
next:
batadv_neigh_node_put(router);
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
}
rcu_read_unlock();
return curr_gw;
}
static bool batadv_iv_gw_is_eligible(struct batadv_priv *bat_priv,
struct batadv_orig_node *curr_gw_orig,
struct batadv_orig_node *orig_node)
{
struct batadv_neigh_ifinfo *router_orig_ifinfo = NULL;
struct batadv_neigh_ifinfo *router_gw_ifinfo = NULL;
struct batadv_neigh_node *router_gw = NULL;
struct batadv_neigh_node *router_orig = NULL;
u8 gw_tq_avg, orig_tq_avg;
bool ret = false;
/* dynamic re-election is performed only on fast or late switch */
if (atomic_read(&bat_priv->gw.sel_class) <= 2)
return false;
router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT);
if (!router_gw) {
ret = true;
goto out;
}
router_gw_ifinfo = batadv_neigh_ifinfo_get(router_gw,
BATADV_IF_DEFAULT);
if (!router_gw_ifinfo) {
ret = true;
goto out;
}
router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
if (!router_orig)
goto out;
router_orig_ifinfo = batadv_neigh_ifinfo_get(router_orig,
BATADV_IF_DEFAULT);
if (!router_orig_ifinfo)
goto out;
gw_tq_avg = router_gw_ifinfo->bat_iv.tq_avg;
orig_tq_avg = router_orig_ifinfo->bat_iv.tq_avg;
/* the TQ value has to be better */
if (orig_tq_avg < gw_tq_avg)
goto out;
/* if the routing class is greater than 3 the value tells us how much
* greater the TQ value of the new gateway must be
*/
if ((atomic_read(&bat_priv->gw.sel_class) > 3) &&
(orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class)))
goto out;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n",
gw_tq_avg, orig_tq_avg);
ret = true;
out:
if (router_gw_ifinfo)
batadv_neigh_ifinfo_put(router_gw_ifinfo);
if (router_orig_ifinfo)
batadv_neigh_ifinfo_put(router_orig_ifinfo);
if (router_gw)
batadv_neigh_node_put(router_gw);
if (router_orig)
batadv_neigh_node_put(router_orig);
return ret;
}
/* fails if orig_node has no router */
static int batadv_iv_gw_write_buffer_text(struct batadv_priv *bat_priv,
struct seq_file *seq,
const struct batadv_gw_node *gw_node)
{
struct batadv_gw_node *curr_gw;
struct batadv_neigh_node *router;
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
int ret = -1;
router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
if (!router)
goto out;
router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
if (!router_ifinfo)
goto out;
curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n",
(curr_gw == gw_node ? "=>" : " "),
gw_node->orig_node->orig,
router_ifinfo->bat_iv.tq_avg, router->addr,
router->if_incoming->net_dev->name,
gw_node->bandwidth_down / 10,
gw_node->bandwidth_down % 10,
gw_node->bandwidth_up / 10,
gw_node->bandwidth_up % 10);
ret = seq_has_overflowed(seq) ? -1 : 0;
if (curr_gw)
batadv_gw_node_put(curr_gw);
out:
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
if (router)
batadv_neigh_node_put(router);
return ret;
}
static void batadv_iv_gw_print(struct batadv_priv *bat_priv,
struct seq_file *seq)
{
struct batadv_gw_node *gw_node;
int gw_count = 0;
seq_puts(seq,
" Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth\n");
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
/* fails if orig_node has no router */
if (batadv_iv_gw_write_buffer_text(bat_priv, seq, gw_node) < 0)
continue;
gw_count++;
}
rcu_read_unlock();
if (gw_count == 0)
seq_puts(seq, "No gateways in range ...\n");
}
static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
.name = "BATMAN_IV",
.iface = {
@ -2137,6 +2337,11 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
.add_if = batadv_iv_ogm_orig_add_if,
.del_if = batadv_iv_ogm_orig_del_if,
},
.gw = {
.get_best_gw_node = batadv_iv_gw_get_best_gw_node,
.is_eligible = batadv_iv_gw_is_eligible,
.print = batadv_iv_gw_print,
},
};
int __init batadv_iv_init(void)

257
net/batman-adv/bat_v.c
View File

@ -21,8 +21,11 @@
#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/cache.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/netdevice.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
@ -34,8 +37,11 @@
#include "bat_algo.h"
#include "bat_v_elp.h"
#include "bat_v_ogm.h"
#include "gateway_client.h"
#include "gateway_common.h"
#include "hard-interface.h"
#include "hash.h"
#include "log.h"
#include "originator.h"
#include "packet.h"
@ -320,6 +326,239 @@ err_ifinfo1:
return ret;
}
static ssize_t batadv_v_store_sel_class(struct batadv_priv *bat_priv,
char *buff, size_t count)
{
u32 old_class, class;
if (!batadv_parse_throughput(bat_priv->soft_iface, buff,
"B.A.T.M.A.N. V GW selection class",
&class))
return -EINVAL;
old_class = atomic_read(&bat_priv->gw.sel_class);
atomic_set(&bat_priv->gw.sel_class, class);
if (old_class != class)
batadv_gw_reselect(bat_priv);
return count;
}
static ssize_t batadv_v_show_sel_class(struct batadv_priv *bat_priv, char *buff)
{
u32 class = atomic_read(&bat_priv->gw.sel_class);
return sprintf(buff, "%u.%u MBit\n", class / 10, class % 10);
}
/**
* batadv_v_gw_throughput_get - retrieve the GW-bandwidth for a given GW
* @gw_node: the GW to retrieve the metric for
* @bw: the pointer where the metric will be stored. The metric is computed as
* the minimum between the GW advertised throughput and the path throughput to
* it in the mesh
*
* Return: 0 on success, -1 on failure
*/
static int batadv_v_gw_throughput_get(struct batadv_gw_node *gw_node, u32 *bw)
{
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
struct batadv_orig_node *orig_node;
struct batadv_neigh_node *router;
int ret = -1;
orig_node = gw_node->orig_node;
router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
if (!router)
goto out;
router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
if (!router_ifinfo)
goto out;
/* the GW metric is computed as the minimum between the path throughput
* to reach the GW itself and the advertised bandwidth.
* This gives us an approximation of the effective throughput that the
* client can expect via this particular GW node
*/
*bw = router_ifinfo->bat_v.throughput;
*bw = min_t(u32, *bw, gw_node->bandwidth_down);
ret = 0;
out:
if (router)
batadv_neigh_node_put(router);
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
return ret;
}
/**
* batadv_v_gw_get_best_gw_node - retrieve the best GW node
* @bat_priv: the bat priv with all the soft interface information
*
* Return: the GW node having the best GW-metric, NULL if no GW is known
*/
static struct batadv_gw_node *
batadv_v_gw_get_best_gw_node(struct batadv_priv *bat_priv)
{
struct batadv_gw_node *gw_node, *curr_gw = NULL;
u32 max_bw = 0, bw;
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
if (!kref_get_unless_zero(&gw_node->refcount))
continue;
if (batadv_v_gw_throughput_get(gw_node, &bw) < 0)
goto next;
if (curr_gw && (bw <= max_bw))
goto next;
if (curr_gw)
batadv_gw_node_put(curr_gw);
curr_gw = gw_node;
kref_get(&curr_gw->refcount);
max_bw = bw;
next:
batadv_gw_node_put(gw_node);
}
rcu_read_unlock();
return curr_gw;
}
/**
* batadv_v_gw_is_eligible - check if a originator would be selected as GW
* @bat_priv: the bat priv with all the soft interface information
* @curr_gw_orig: originator representing the currently selected GW
* @orig_node: the originator representing the new candidate
*
* Return: true if orig_node can be selected as current GW, false otherwise
*/
static bool batadv_v_gw_is_eligible(struct batadv_priv *bat_priv,
struct batadv_orig_node *curr_gw_orig,
struct batadv_orig_node *orig_node)
{
struct batadv_gw_node *curr_gw = NULL, *orig_gw = NULL;
u32 gw_throughput, orig_throughput, threshold;
bool ret = false;
threshold = atomic_read(&bat_priv->gw.sel_class);
curr_gw = batadv_gw_node_get(bat_priv, curr_gw_orig);
if (!curr_gw) {
ret = true;
goto out;
}
if (batadv_v_gw_throughput_get(curr_gw, &gw_throughput) < 0) {
ret = true;
goto out;
}
orig_gw = batadv_gw_node_get(bat_priv, orig_node);
if (!orig_node)
goto out;
if (batadv_v_gw_throughput_get(orig_gw, &orig_throughput) < 0)
goto out;
if (orig_throughput < gw_throughput)
goto out;
if ((orig_throughput - gw_throughput) < threshold)
goto out;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Restarting gateway selection: better gateway found (throughput curr: %u, throughput new: %u)\n",
gw_throughput, orig_throughput);
ret = true;
out:
if (curr_gw)
batadv_gw_node_put(curr_gw);
if (orig_gw)
batadv_gw_node_put(orig_gw);
return ret;
}
/* fails if orig_node has no router */
static int batadv_v_gw_write_buffer_text(struct batadv_priv *bat_priv,
struct seq_file *seq,
const struct batadv_gw_node *gw_node)
{
struct batadv_gw_node *curr_gw;
struct batadv_neigh_node *router;
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
int ret = -1;
router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
if (!router)
goto out;
router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
if (!router_ifinfo)
goto out;
curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
seq_printf(seq, "%s %pM (%9u.%1u) %pM [%10s]: %u.%u/%u.%u MBit\n",
(curr_gw == gw_node ? "=>" : " "),
gw_node->orig_node->orig,
router_ifinfo->bat_v.throughput / 10,
router_ifinfo->bat_v.throughput % 10, router->addr,
router->if_incoming->net_dev->name,
gw_node->bandwidth_down / 10,
gw_node->bandwidth_down % 10,
gw_node->bandwidth_up / 10,
gw_node->bandwidth_up % 10);
ret = seq_has_overflowed(seq) ? -1 : 0;
if (curr_gw)
batadv_gw_node_put(curr_gw);
out:
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
if (router)
batadv_neigh_node_put(router);
return ret;
}
/**
* batadv_v_gw_print - print the gateway list
* @bat_priv: the bat priv with all the soft interface information
* @seq: gateway table seq_file struct
*/
static void batadv_v_gw_print(struct batadv_priv *bat_priv,
struct seq_file *seq)
{
struct batadv_gw_node *gw_node;
int gw_count = 0;
seq_puts(seq,
" Gateway ( throughput) Nexthop [outgoingIF]: advertised uplink bandwidth\n");
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
/* fails if orig_node has no router */
if (batadv_v_gw_write_buffer_text(bat_priv, seq, gw_node) < 0)
continue;
gw_count++;
}
rcu_read_unlock();
if (gw_count == 0)
seq_puts(seq, "No gateways in range ...\n");
}
static struct batadv_algo_ops batadv_batman_v __read_mostly = {
.name = "BATMAN_V",
.iface = {
@ -338,6 +577,13 @@ static struct batadv_algo_ops batadv_batman_v __read_mostly = {
.orig = {
.print = batadv_v_orig_print,
},
.gw = {
.store_sel_class = batadv_v_store_sel_class,
.show_sel_class = batadv_v_show_sel_class,
.get_best_gw_node = batadv_v_gw_get_best_gw_node,
.is_eligible = batadv_v_gw_is_eligible,
.print = batadv_v_gw_print,
},
};
/**
@ -363,7 +609,16 @@ void batadv_v_hardif_init(struct batadv_hard_iface *hard_iface)
*/
int batadv_v_mesh_init(struct batadv_priv *bat_priv)
{
return batadv_v_ogm_init(bat_priv);
int ret = 0;
ret = batadv_v_ogm_init(bat_priv);
if (ret < 0)
return ret;
/* set default throughput difference threshold to 5Mbps */
atomic_set(&bat_priv->gw.sel_class, 50);
return 0;
}
/**

2
net/batman-adv/bridge_loop_avoidance.c
View File

@ -1148,7 +1148,7 @@ static bool batadv_bla_process_claim(struct batadv_priv *bat_priv,
/* Let the loopdetect frames on the mesh in any case. */
if (bla_dst->type == BATADV_CLAIM_TYPE_LOOPDETECT)
return 0;
return false;
/* check if it is a claim frame. */
ret = batadv_check_claim_group(bat_priv, primary_if, hw_src, hw_dst,

222
net/batman-adv/gateway_client.c
View File

@ -80,12 +80,12 @@ static void batadv_gw_node_release(struct kref *ref)
* batadv_gw_node_put - decrement the gw_node refcounter and possibly release it
* @gw_node: gateway node to free
*/
static void batadv_gw_node_put(struct batadv_gw_node *gw_node)
void batadv_gw_node_put(struct batadv_gw_node *gw_node)
{
kref_put(&gw_node->refcount, batadv_gw_node_release);
}
static struct batadv_gw_node *
struct batadv_gw_node *
batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv)
{
struct batadv_gw_node *gw_node;
@ -164,86 +164,6 @@ void batadv_gw_reselect(struct batadv_priv *bat_priv)
atomic_set(&bat_priv->gw.reselect, 1);
}
static struct batadv_gw_node *
batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv)
{
struct batadv_neigh_node *router;
struct batadv_neigh_ifinfo *router_ifinfo;
struct batadv_gw_node *gw_node, *curr_gw = NULL;
u64 max_gw_factor = 0;
u64 tmp_gw_factor = 0;
u8 max_tq = 0;
u8 tq_avg;
struct batadv_orig_node *orig_node;
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
orig_node = gw_node->orig_node;
router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
if (!router)
continue;
router_ifinfo = batadv_neigh_ifinfo_get(router,
BATADV_IF_DEFAULT);
if (!router_ifinfo)
goto next;
if (!kref_get_unless_zero(&gw_node->refcount))
goto next;
tq_avg = router_ifinfo->bat_iv.tq_avg;
switch (atomic_read(&bat_priv->gw.sel_class)) {
case 1: /* fast connection */
tmp_gw_factor = tq_avg * tq_avg;
tmp_gw_factor *= gw_node->bandwidth_down;
tmp_gw_factor *= 100 * 100;
tmp_gw_factor >>= 18;
if ((tmp_gw_factor > max_gw_factor) ||
((tmp_gw_factor == max_gw_factor) &&
(tq_avg > max_tq))) {
if (curr_gw)
batadv_gw_node_put(curr_gw);
curr_gw = gw_node;
kref_get(&curr_gw->refcount);
}
break;
default: /* 2: stable connection (use best statistic)
* 3: fast-switch (use best statistic but change as
* soon as a better gateway appears)
* XX: late-switch (use best statistic but change as
* soon as a better gateway appears which has
* $routing_class more tq points)
*/
if (tq_avg > max_tq) {
if (curr_gw)
batadv_gw_node_put(curr_gw);
curr_gw = gw_node;
kref_get(&curr_gw->refcount);
}
break;
}
if (tq_avg > max_tq)
max_tq = tq_avg;
if (tmp_gw_factor > max_gw_factor)
max_gw_factor = tmp_gw_factor;
batadv_gw_node_put(gw_node);
next:
batadv_neigh_node_put(router);
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
}
rcu_read_unlock();
return curr_gw;
}
/**
* batadv_gw_check_client_stop - check if client mode has been switched off
* @bat_priv: the bat priv with all the soft interface information
@ -287,12 +207,19 @@ void batadv_gw_election(struct batadv_priv *bat_priv)
if (atomic_read(&bat_priv->gw.mode) != BATADV_GW_MODE_CLIENT)
goto out;
if (!bat_priv->algo_ops->gw.get_best_gw_node)
goto out;
curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
if (!batadv_atomic_dec_not_zero(&bat_priv->gw.reselect) && curr_gw)
goto out;
next_gw = batadv_gw_get_best_gw_node(bat_priv);
/* if gw.reselect is set to 1 it means that a previous call to
* gw.is_eligible() said that we have a new best GW, therefore it can
* now be picked from the list and selected
*/
next_gw = bat_priv->algo_ops->gw.get_best_gw_node(bat_priv);
if (curr_gw == next_gw)
goto out;
@ -360,70 +287,31 @@ out:
void batadv_gw_check_election(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node)
{
struct batadv_neigh_ifinfo *router_orig_tq = NULL;
struct batadv_neigh_ifinfo *router_gw_tq = NULL;
struct batadv_orig_node *curr_gw_orig;
struct batadv_neigh_node *router_gw = NULL;
struct batadv_neigh_node *router_orig = NULL;
u8 gw_tq_avg, orig_tq_avg;
/* abort immediately if the routing algorithm does not support gateway
* election
*/
if (!bat_priv->algo_ops->gw.is_eligible)
return;
curr_gw_orig = batadv_gw_get_selected_orig(bat_priv);
if (!curr_gw_orig)
goto reselect;
router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT);
if (!router_gw)
goto reselect;
router_gw_tq = batadv_neigh_ifinfo_get(router_gw,
BATADV_IF_DEFAULT);
if (!router_gw_tq)
goto reselect;
/* this node already is the gateway */
if (curr_gw_orig == orig_node)
goto out;
router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
if (!router_orig)
if (!bat_priv->algo_ops->gw.is_eligible(bat_priv, curr_gw_orig,
orig_node))
goto out;
router_orig_tq = batadv_neigh_ifinfo_get(router_orig,
BATADV_IF_DEFAULT);
if (!router_orig_tq)
goto out;
gw_tq_avg = router_gw_tq->bat_iv.tq_avg;
orig_tq_avg = router_orig_tq->bat_iv.tq_avg;
/* the TQ value has to be better */
if (orig_tq_avg < gw_tq_avg)
goto out;
/* if the routing class is greater than 3 the value tells us how much
* greater the TQ value of the new gateway must be
*/
if ((atomic_read(&bat_priv->gw.sel_class) > 3) &&
(orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class)))
goto out;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n",
gw_tq_avg, orig_tq_avg);
reselect:
batadv_gw_reselect(bat_priv);
out:
if (curr_gw_orig)
batadv_orig_node_put(curr_gw_orig);
if (router_gw)
batadv_neigh_node_put(router_gw);
if (router_orig)
batadv_neigh_node_put(router_orig);
if (router_gw_tq)
batadv_neigh_ifinfo_put(router_gw_tq);
if (router_orig_tq)
batadv_neigh_ifinfo_put(router_orig_tq);
}
/**
@ -472,9 +360,8 @@ static void batadv_gw_node_add(struct batadv_priv *bat_priv,
*
* Return: gateway node if found or NULL otherwise.
*/
static struct batadv_gw_node *
batadv_gw_node_get(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node)
struct batadv_gw_node *batadv_gw_node_get(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node)
{
struct batadv_gw_node *gw_node_tmp, *gw_node = NULL;
@ -585,80 +472,31 @@ void batadv_gw_node_free(struct batadv_priv *bat_priv)
spin_unlock_bh(&bat_priv->gw.list_lock);
}
/* fails if orig_node has no router */
static int batadv_write_buffer_text(struct batadv_priv *bat_priv,
struct seq_file *seq,
const struct batadv_gw_node *gw_node)
{
struct batadv_gw_node *curr_gw;
struct batadv_neigh_node *router;
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
int ret = -1;
router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
if (!router)
goto out;
router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
if (!router_ifinfo)
goto out;
curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n",
(curr_gw == gw_node ? "=>" : " "),
gw_node->orig_node->orig,
router_ifinfo->bat_iv.tq_avg, router->addr,
router->if_incoming->net_dev->name,
gw_node->bandwidth_down / 10,
gw_node->bandwidth_down % 10,
gw_node->bandwidth_up / 10,
gw_node->bandwidth_up % 10);
ret = seq_has_overflowed(seq) ? -1 : 0;
if (curr_gw)
batadv_gw_node_put(curr_gw);
out:
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
if (router)
batadv_neigh_node_put(router);
return ret;
}
int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
{
struct net_device *net_dev = (struct net_device *)seq->private;
struct batadv_priv *bat_priv = netdev_priv(net_dev);
struct batadv_hard_iface *primary_if;
struct batadv_gw_node *gw_node;
int gw_count = 0;
primary_if = batadv_seq_print_text_primary_if_get(seq);
if (!primary_if)
goto out;
return 0;
seq_printf(seq,
" Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth ... [B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
BATADV_SOURCE_VERSION, primary_if->net_dev->name,
primary_if->net_dev->dev_addr, net_dev->name);
primary_if->net_dev->dev_addr, net_dev->name,
bat_priv->algo_ops->name);
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
/* fails if orig_node has no router */
if (batadv_write_buffer_text(bat_priv, seq, gw_node) < 0)
continue;
batadv_hardif_put(primary_if);
gw_count++;
if (!bat_priv->algo_ops->gw.print) {
seq_puts(seq,
"No printing function for this routing protocol\n");
return 0;
}
rcu_read_unlock();
if (gw_count == 0)
seq_puts(seq, "No gateways in range ...\n");
bat_priv->algo_ops->gw.print(bat_priv, seq);
out:
if (primary_if)
batadv_hardif_put(primary_if);
return 0;
}

5
net/batman-adv/gateway_client.h
View File

@ -39,10 +39,15 @@ void batadv_gw_node_update(struct batadv_priv *bat_priv,
void batadv_gw_node_delete(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node);
void batadv_gw_node_free(struct batadv_priv *bat_priv);
void batadv_gw_node_put(struct batadv_gw_node *gw_node);
struct batadv_gw_node *
batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv);
int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset);
bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb);
enum batadv_dhcp_recipient
batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len,
u8 *chaddr);
struct batadv_gw_node *batadv_gw_node_get(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node);
#endif /* _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ */

5
net/batman-adv/gateway_common.c
View File

@ -241,10 +241,9 @@ static void batadv_gw_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
batadv_gw_node_update(bat_priv, orig, &gateway);
/* restart gateway selection if fast or late switching was enabled */
/* restart gateway selection */
if ((gateway.bandwidth_down != 0) &&
(atomic_read(&bat_priv->gw.mode) == BATADV_GW_MODE_CLIENT) &&
(atomic_read(&bat_priv->gw.sel_class) > 2))
(atomic_read(&bat_priv->gw.mode) == BATADV_GW_MODE_CLIENT))
batadv_gw_check_election(bat_priv, orig);
}

26
net/batman-adv/hard-interface.c
View File

@ -35,7 +35,6 @@
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include "bat_v.h"
#include "bridge_loop_avoidance.h"
@ -625,25 +624,6 @@ out:
batadv_hardif_put(primary_if);
}
/**
* batadv_hardif_remove_interface_finish - cleans up the remains of a hardif
* @work: work queue item
*
* Free the parts of the hard interface which can not be removed under
* rtnl lock (to prevent deadlock situations).
*/
static void batadv_hardif_remove_interface_finish(struct work_struct *work)
{
struct batadv_hard_iface *hard_iface;
hard_iface = container_of(work, struct batadv_hard_iface,
cleanup_work);
batadv_debugfs_del_hardif(hard_iface);
batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
batadv_hardif_put(hard_iface);
}
static struct batadv_hard_iface *
batadv_hardif_add_interface(struct net_device *net_dev)
{
@ -676,8 +656,6 @@ batadv_hardif_add_interface(struct net_device *net_dev)
INIT_LIST_HEAD(&hard_iface->list);
INIT_HLIST_HEAD(&hard_iface->neigh_list);
INIT_WORK(&hard_iface->cleanup_work,
batadv_hardif_remove_interface_finish);
spin_lock_init(&hard_iface->neigh_list_lock);
@ -719,7 +697,9 @@ static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface)
return;
hard_iface->if_status = BATADV_IF_TO_BE_REMOVED;
queue_work(batadv_event_workqueue, &hard_iface->cleanup_work);
batadv_debugfs_del_hardif(hard_iface);
batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
batadv_hardif_put(hard_iface);
}
void batadv_hardif_remove_interfaces(void)

17
net/batman-adv/main.c
View File

@ -82,6 +82,12 @@ static void batadv_recv_handler_init(void);
static int __init batadv_init(void)
{
int ret;
ret = batadv_tt_cache_init();
if (ret < 0)
return ret;
INIT_LIST_HEAD(&batadv_hardif_list);
batadv_algo_init();
@ -93,9 +99,8 @@ static int __init batadv_init(void)
batadv_tp_meter_init();
batadv_event_workqueue = create_singlethread_workqueue("bat_events");
if (!batadv_event_workqueue)
return -ENOMEM;
goto err_create_wq;
batadv_socket_init();
batadv_debugfs_init();
@ -108,6 +113,11 @@ static int __init batadv_init(void)
BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION);
return 0;
err_create_wq:
batadv_tt_cache_destroy();
return -ENOMEM;
}
static void __exit batadv_exit(void)
@ -123,6 +133,8 @@ static void __exit batadv_exit(void)
batadv_event_workqueue = NULL;
rcu_barrier();
batadv_tt_cache_destroy();
}
int batadv_mesh_init(struct net_device *soft_iface)
@ -638,3 +650,4 @@ MODULE_AUTHOR(BATADV_DRIVER_AUTHOR);
MODULE_DESCRIPTION(BATADV_DRIVER_DESC);
MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE);
MODULE_VERSION(BATADV_SOURCE_VERSION);
MODULE_ALIAS_RTNL_LINK("batadv");

2
net/batman-adv/main.h
View File

@ -24,7 +24,7 @@
#define BATADV_DRIVER_DEVICE "batman-adv"
#ifndef BATADV_SOURCE_VERSION
#define BATADV_SOURCE_VERSION "2016.3"
#define BATADV_SOURCE_VERSION "2016.4"
#endif
/* B.A.T.M.A.N. parameters */

2
net/batman-adv/multicast.c
View File

@ -528,7 +528,7 @@ update:
}
return !(mcast_data.flags &
(BATADV_MCAST_WANT_ALL_IPV4 + BATADV_MCAST_WANT_ALL_IPV6));
(BATADV_MCAST_WANT_ALL_IPV4 | BATADV_MCAST_WANT_ALL_IPV6));
}
/**

43
net/batman-adv/routing.c
View File

@ -74,11 +74,23 @@ static void _batadv_update_route(struct batadv_priv *bat_priv,
if (!orig_ifinfo)
return;
rcu_read_lock();
curr_router = rcu_dereference(orig_ifinfo->router);
if (curr_router && !kref_get_unless_zero(&curr_router->refcount))
curr_router = NULL;
rcu_read_unlock();
spin_lock_bh(&orig_node->neigh_list_lock);
/* curr_router used earlier may not be the current orig_ifinfo->router
* anymore because it was dereferenced outside of the neigh_list_lock
* protected region. After the new best neighbor has replace the current
* best neighbor the reference counter needs to decrease. Consequently,
* the code needs to ensure the curr_router variable contains a pointer
* to the replaced best neighbor.
*/
curr_router = rcu_dereference_protected(orig_ifinfo->router, true);
/* increase refcount of new best neighbor */
if (neigh_node)
kref_get(&neigh_node->refcount);
rcu_assign_pointer(orig_ifinfo->router, neigh_node);
spin_unlock_bh(&orig_node->neigh_list_lock);
batadv_orig_ifinfo_put(orig_ifinfo);
/* route deleted */
if ((curr_router) && (!neigh_node)) {
@ -100,27 +112,6 @@ static void _batadv_update_route(struct batadv_priv *bat_priv,
curr_router->addr);
}
if (curr_router)
batadv_neigh_node_put(curr_router);
spin_lock_bh(&orig_node->neigh_list_lock);
/* curr_router used earlier may not be the current orig_ifinfo->router
* anymore because it was dereferenced outside of the neigh_list_lock
* protected region. After the new best neighbor has replace the current
* best neighbor the reference counter needs to decrease. Consequently,
* the code needs to ensure the curr_router variable contains a pointer
* to the replaced best neighbor.
*/
curr_router = rcu_dereference_protected(orig_ifinfo->router, true);
/* increase refcount of new best neighbor */
if (neigh_node)
kref_get(&neigh_node->refcount);
rcu_assign_pointer(orig_ifinfo->router, neigh_node);
spin_unlock_bh(&orig_node->neigh_list_lock);
batadv_orig_ifinfo_put(orig_ifinfo);
/* decrease refcount of previous best neighbor */
if (curr_router)
batadv_neigh_node_put(curr_router);

136
net/batman-adv/send.c
View File

@ -315,8 +315,7 @@ out:
*
* Wrap the given skb into a batman-adv unicast or unicast-4addr header
* depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied
* as packet_type. Then send this frame to the given orig_node and release a
* reference to this orig_node.
* as packet_type. Then send this frame to the given orig_node.
*
* Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
*/
@ -370,8 +369,6 @@ int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
ret = NET_XMIT_SUCCESS;
out:
if (orig_node)
batadv_orig_node_put(orig_node);
if (ret == NET_XMIT_DROP)
kfree_skb(skb);
return ret;
@ -403,6 +400,7 @@ int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct batadv_orig_node *orig_node;
u8 *src, *dst;
int ret;
src = ethhdr->h_source;
dst = ethhdr->h_dest;
@ -414,8 +412,13 @@ int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
}
orig_node = batadv_transtable_search(bat_priv, src, dst, vid);
return batadv_send_skb_unicast(bat_priv, skb, packet_type,
packet_subtype, orig_node, vid);
ret = batadv_send_skb_unicast(bat_priv, skb, packet_type,
packet_subtype, orig_node, vid);
if (orig_node)
batadv_orig_node_put(orig_node);
return ret;
}
/**
@ -433,12 +436,25 @@ int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb,
unsigned short vid)
{
struct batadv_orig_node *orig_node;
int ret;
orig_node = batadv_gw_get_selected_orig(bat_priv);
return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST_4ADDR,
BATADV_P_DATA, orig_node, vid);
ret = batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST_4ADDR,
BATADV_P_DATA, orig_node, vid);
if (orig_node)
batadv_orig_node_put(orig_node);
return ret;
}
/**
* batadv_forw_packet_free - free a forwarding packet
* @forw_packet: The packet to free
*
* This frees a forwarding packet and releases any resources it might
* have claimed.
*/
void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet)
{
kfree_skb(forw_packet->skb);
@ -446,9 +462,73 @@ void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet)
batadv_hardif_put(forw_packet->if_incoming);
if (forw_packet->if_outgoing)
batadv_hardif_put(forw_packet->if_outgoing);
if (forw_packet->queue_left)
atomic_inc(forw_packet->queue_left);
kfree(forw_packet);
}
/**
* batadv_forw_packet_alloc - allocate a forwarding packet
* @if_incoming: The (optional) if_incoming to be grabbed
* @if_outgoing: The (optional) if_outgoing to be grabbed
* @queue_left: The (optional) queue counter to decrease
* @bat_priv: The bat_priv for the mesh of this forw_packet
*
* Allocates a forwarding packet and tries to get a reference to the
* (optional) if_incoming, if_outgoing and queue_left. If queue_left
* is NULL then bat_priv is optional, too.
*
* Return: An allocated forwarding packet on success, NULL otherwise.
*/
struct batadv_forw_packet *
batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
struct batadv_hard_iface *if_outgoing,
atomic_t *queue_left,
struct batadv_priv *bat_priv)
{
struct batadv_forw_packet *forw_packet;
const char *qname;
if (queue_left && !batadv_atomic_dec_not_zero(queue_left)) {
qname = "unknown";
if (queue_left == &bat_priv->bcast_queue_left)
qname = "bcast";
if (queue_left == &bat_priv->batman_queue_left)
qname = "batman";
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"%s queue is full\n", qname);
return NULL;
}
forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC);
if (!forw_packet)
goto err;
if (if_incoming)
kref_get(&if_incoming->refcount);
if (if_outgoing)
kref_get(&if_outgoing->refcount);
forw_packet->skb = NULL;
forw_packet->queue_left = queue_left;
forw_packet->if_incoming = if_incoming;
forw_packet->if_outgoing = if_outgoing;
forw_packet->num_packets = 0;
return forw_packet;
err:
if (queue_left)
atomic_inc(queue_left);
return NULL;
}
static void
_batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet,
@ -487,24 +567,20 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
struct batadv_bcast_packet *bcast_packet;
struct sk_buff *newskb;
if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) {
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"bcast packet queue full\n");
goto out;
}
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
goto out_and_inc;
forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC);
goto err;
forw_packet = batadv_forw_packet_alloc(primary_if, NULL,
&bat_priv->bcast_queue_left,
bat_priv);
batadv_hardif_put(primary_if);
if (!forw_packet)
goto out_and_inc;
goto err;
newskb = skb_copy(skb, GFP_ATOMIC);
if (!newskb)
goto packet_free;
goto err_packet_free;
/* as we have a copy now, it is safe to decrease the TTL */
bcast_packet = (struct batadv_bcast_packet *)newskb->data;
@ -513,11 +589,6 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
skb_reset_mac_header(newskb);
forw_packet->skb = newskb;
forw_packet->if_incoming = primary_if;
forw_packet->if_outgoing = NULL;
/* how often did we send the bcast packet ? */
forw_packet->num_packets = 0;
INIT_DELAYED_WORK(&forw_packet->delayed_work,
batadv_send_outstanding_bcast_packet);
@ -525,13 +596,9 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
_batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay);
return NETDEV_TX_OK;
packet_free:
kfree(forw_packet);
out_and_inc:
atomic_inc(&bat_priv->bcast_queue_left);
out:
if (primary_if)
batadv_hardif_put(primary_if);
err_packet_free:
batadv_forw_packet_free(forw_packet);
err:
return NETDEV_TX_BUSY;
}
@ -592,7 +659,6 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
out:
batadv_forw_packet_free(forw_packet);
atomic_inc(&bat_priv->bcast_queue_left);
}
void
@ -633,9 +699,6 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
if (pending) {
hlist_del(&forw_packet->list);
if (!forw_packet->own)
atomic_inc(&bat_priv->bcast_queue_left);
batadv_forw_packet_free(forw_packet);
}
}
@ -663,9 +726,6 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
if (pending) {
hlist_del(&forw_packet->list);
if (!forw_packet->own)
atomic_inc(&bat_priv->batman_queue_left);
batadv_forw_packet_free(forw_packet);
}
}

6
net/batman-adv/send.h
View File

@ -28,6 +28,12 @@
struct sk_buff;
void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet);
struct batadv_forw_packet *
batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
struct batadv_hard_iface *if_outgoing,
atomic_t *queue_left,
struct batadv_priv *bat_priv);
int batadv_send_skb_to_orig(struct sk_buff *skb,
struct batadv_orig_node *orig_node,
struct batadv_hard_iface *recv_if);

47
net/batman-adv/soft-interface.c
View File

@ -39,6 +39,7 @@
#include <linux/random.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/socket.h>
@ -46,7 +47,6 @@
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include "bat_algo.h"
#include "bridge_loop_avoidance.h"
@ -57,6 +57,7 @@
#include "hard-interface.h"
#include "multicast.h"
#include "network-coding.h"
#include "originator.h"
#include "packet.h"
#include "send.h"
#include "sysfs.h"
@ -377,6 +378,8 @@ dropped:
dropped_freed:
batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
end:
if (mcast_single_orig)
batadv_orig_node_put(mcast_single_orig);
if (primary_if)
batadv_hardif_put(primary_if);
return NETDEV_TX_OK;
@ -746,34 +749,6 @@ static void batadv_set_lockdep_class(struct net_device *dev)
netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
}
/**
* batadv_softif_destroy_finish - cleans up the remains of a softif
* @work: work queue item
*
* Free the parts of the soft interface which can not be removed under
* rtnl lock (to prevent deadlock situations).
*/
static void batadv_softif_destroy_finish(struct work_struct *work)
{
struct batadv_softif_vlan *vlan;
struct batadv_priv *bat_priv;
struct net_device *soft_iface;
bat_priv = container_of(work, struct batadv_priv,
cleanup_work);
soft_iface = bat_priv->soft_iface;
/* destroy the "untagged" VLAN */
vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
if (vlan) {
batadv_softif_destroy_vlan(bat_priv, vlan);
batadv_softif_vlan_put(vlan);
}
batadv_sysfs_del_meshif(soft_iface);
unregister_netdev(soft_iface);
}
/**
* batadv_softif_init_late - late stage initialization of soft interface
* @dev: registered network device to modify
@ -791,7 +766,6 @@ static int batadv_softif_init_late(struct net_device *dev)
bat_priv = netdev_priv(dev);
bat_priv->soft_iface = dev;
INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
/* batadv_interface_stats() needs to be available as soon as
* register_netdevice() has been called
@ -1028,8 +1002,19 @@ struct net_device *batadv_softif_create(struct net *net, const char *name)
void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
{
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
struct batadv_softif_vlan *vlan;
queue_work(batadv_event_workqueue, &bat_priv->cleanup_work);
ASSERT_RTNL();
/* destroy the "untagged" VLAN */
vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
if (vlan) {
batadv_softif_destroy_vlan(bat_priv, vlan);
batadv_softif_vlan_put(vlan);
}
batadv_sysfs_del_meshif(soft_iface);
unregister_netdevice(soft_iface);
}
/**

183
net/batman-adv/sysfs.c
View File

@ -37,6 +37,7 @@
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/stringify.h>
#include <linux/workqueue.h>
#include "bridge_loop_avoidance.h"
#include "distributed-arp-table.h"
@ -428,6 +429,13 @@ static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
int bytes_written;
/* GW mode is not available if the routing algorithm in use does not
* implement the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -ENOENT;
switch (atomic_read(&bat_priv->gw.mode)) {
case BATADV_GW_MODE_CLIENT:
bytes_written = sprintf(buff, "%s\n",
@ -455,6 +463,13 @@ static ssize_t batadv_store_gw_mode(struct kobject *kobj,
char *curr_gw_mode_str;
int gw_mode_tmp = -1;
/* toggling GW mode is allowed only if the routing algorithm in use
* provides the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -EINVAL;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
@ -514,6 +529,50 @@ static ssize_t batadv_store_gw_mode(struct kobject *kobj,
return count;
}
static ssize_t batadv_show_gw_sel_class(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
/* GW selection class is not available if the routing algorithm in use
* does not implement the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -ENOENT;
if (bat_priv->algo_ops->gw.show_sel_class)
return bat_priv->algo_ops->gw.show_sel_class(bat_priv, buff);
return sprintf(buff, "%i\n", atomic_read(&bat_priv->gw.sel_class));
}
static ssize_t batadv_store_gw_sel_class(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
/* setting the GW selection class is allowed only if the routing
* algorithm in use implements the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -EINVAL;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if (bat_priv->algo_ops->gw.store_sel_class)
return bat_priv->algo_ops->gw.store_sel_class(bat_priv, buff,
count);
return __batadv_store_uint_attr(buff, count, 1, BATADV_TQ_MAX_VALUE,
batadv_post_gw_reselect, attr,
&bat_priv->gw.sel_class,
bat_priv->soft_iface);
}
static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
struct attribute *attr, char *buff)
{
@ -625,8 +684,8 @@ BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, S_IRUGO | S_IWUSR,
2 * BATADV_JITTER, INT_MAX, NULL);
BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, S_IRUGO | S_IWUSR, 0,
BATADV_TQ_MAX_VALUE, NULL);
BATADV_ATTR_SIF_UINT(gw_sel_class, gw.sel_class, S_IRUGO | S_IWUSR, 1,
BATADV_TQ_MAX_VALUE, batadv_post_gw_reselect);
static BATADV_ATTR(gw_sel_class, S_IRUGO | S_IWUSR, batadv_show_gw_sel_class,
batadv_store_gw_sel_class);
static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
batadv_store_gw_bwidth);
#ifdef CONFIG_BATMAN_ADV_MCAST
@ -712,6 +771,8 @@ rem_attr:
for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
kobject_del(bat_priv->mesh_obj);
kobject_put(bat_priv->mesh_obj);
bat_priv->mesh_obj = NULL;
out:
@ -726,6 +787,8 @@ void batadv_sysfs_del_meshif(struct net_device *dev)
for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
kobject_del(bat_priv->mesh_obj);
kobject_put(bat_priv->mesh_obj);
bat_priv->mesh_obj = NULL;
}
@ -781,6 +844,10 @@ rem_attr:
for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
if (vlan->kobj != bat_priv->mesh_obj) {
kobject_uevent(vlan->kobj, KOBJ_REMOVE);
kobject_del(vlan->kobj);
}
kobject_put(vlan->kobj);
vlan->kobj = NULL;
out:
@ -800,6 +867,10 @@ void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
if (vlan->kobj != bat_priv->mesh_obj) {
kobject_uevent(vlan->kobj, KOBJ_REMOVE);
kobject_del(vlan->kobj);
}
kobject_put(vlan->kobj);
vlan->kobj = NULL;
}
@ -828,31 +899,31 @@ static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
return length;
}
static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
/**
* batadv_store_mesh_iface_finish - store new hardif mesh_iface state
* @net_dev: netdevice to add/remove to/from batman-adv soft-interface
* @ifname: name of soft-interface to modify
*
* Changes the parts of the hard+soft interface which can not be modified under
* sysfs lock (to prevent deadlock situations).
*
* Return: 0 on success, 0 < on failure
*/
static int batadv_store_mesh_iface_finish(struct net_device *net_dev,
char ifname[IFNAMSIZ])
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct net *net = dev_net(net_dev);
struct batadv_hard_iface *hard_iface;
int status_tmp = -1;
int ret = count;
int status_tmp;
int ret = 0;
ASSERT_RTNL();
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface)
return count;
return 0;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if (strlen(buff) >= IFNAMSIZ) {
pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
buff);
batadv_hardif_put(hard_iface);
return -EINVAL;
}
if (strncmp(buff, "none", 4) == 0)
if (strncmp(ifname, "none", 4) == 0)
status_tmp = BATADV_IF_NOT_IN_USE;
else
status_tmp = BATADV_IF_I_WANT_YOU;
@ -861,15 +932,13 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
goto out;
if ((hard_iface->soft_iface) &&
(strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
(strncmp(hard_iface->soft_iface->name, ifname, IFNAMSIZ) == 0))
goto out;
rtnl_lock();
if (status_tmp == BATADV_IF_NOT_IN_USE) {
batadv_hardif_disable_interface(hard_iface,
BATADV_IF_CLEANUP_AUTO);
goto unlock;
goto out;
}
/* if the interface already is in use */
@ -877,15 +946,71 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
batadv_hardif_disable_interface(hard_iface,
BATADV_IF_CLEANUP_AUTO);
ret = batadv_hardif_enable_interface(hard_iface, net, buff);
unlock:
rtnl_unlock();
ret = batadv_hardif_enable_interface(hard_iface, net, ifname);
out:
batadv_hardif_put(hard_iface);
return ret;
}
/**
* batadv_store_mesh_iface_work - store new hardif mesh_iface state
* @work: work queue item
*
* Changes the parts of the hard+soft interface which can not be modified under
* sysfs lock (to prevent deadlock situations).
*/
static void batadv_store_mesh_iface_work(struct work_struct *work)
{
struct batadv_store_mesh_work *store_work;
int ret;
store_work = container_of(work, struct batadv_store_mesh_work, work);
rtnl_lock();
ret = batadv_store_mesh_iface_finish(store_work->net_dev,
store_work->soft_iface_name);
rtnl_unlock();
if (ret < 0)
pr_err("Failed to store new mesh_iface state %s for %s: %d\n",
store_work->soft_iface_name, store_work->net_dev->name,
ret);
dev_put(store_work->net_dev);
kfree(store_work);
}
static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_store_mesh_work *store_work;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if (strlen(buff) >= IFNAMSIZ) {
pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
buff);
return -EINVAL;
}
store_work = kmalloc(sizeof(*store_work), GFP_KERNEL);
if (!store_work)
return -ENOMEM;
dev_hold(net_dev);
INIT_WORK(&store_work->work, batadv_store_mesh_iface_work);
store_work->net_dev = net_dev;
strlcpy(store_work->soft_iface_name, buff,
sizeof(store_work->soft_iface_name));
queue_work(batadv_event_workqueue, &store_work->work);
return count;
}
static ssize_t batadv_show_iface_status(struct kobject *kobj,
struct attribute *attr, char *buff)
{
@ -1048,6 +1173,8 @@ out:
void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
{
kobject_uevent(*hardif_obj, KOBJ_REMOVE);
kobject_del(*hardif_obj);
kobject_put(*hardif_obj);
*hardif_obj = NULL;
}

169
net/batman-adv/translation-table.c
View File

@ -22,12 +22,14 @@
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/byteorder/generic.h>
#include <linux/cache.h>
#include <linux/compiler.h>
#include <linux/crc32c.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/fs.h>
#include <linux/if_ether.h>
#include <linux/init.h>
#include <linux/jhash.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
@ -54,6 +56,13 @@
#include "soft-interface.h"
#include "tvlv.h"
static struct kmem_cache *batadv_tl_cache __read_mostly;
static struct kmem_cache *batadv_tg_cache __read_mostly;
static struct kmem_cache *batadv_tt_orig_cache __read_mostly;
static struct kmem_cache *batadv_tt_change_cache __read_mostly;
static struct kmem_cache *batadv_tt_req_cache __read_mostly;
static struct kmem_cache *batadv_tt_roam_cache __read_mostly;
/* hash class keys */
static struct lock_class_key batadv_tt_local_hash_lock_class_key;
static struct lock_class_key batadv_tt_global_hash_lock_class_key;
@ -204,6 +213,20 @@ batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr,
return tt_global_entry;
}
/**
* batadv_tt_local_entry_free_rcu - free the tt_local_entry
* @rcu: rcu pointer of the tt_local_entry
*/
static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu)
{
struct batadv_tt_local_entry *tt_local_entry;
tt_local_entry = container_of(rcu, struct batadv_tt_local_entry,
common.rcu);
kmem_cache_free(batadv_tl_cache, tt_local_entry);
}
/**
* batadv_tt_local_entry_release - release tt_local_entry from lists and queue
* for free after rcu grace period
@ -218,7 +241,7 @@ static void batadv_tt_local_entry_release(struct kref *ref)
batadv_softif_vlan_put(tt_local_entry->vlan);
kfree_rcu(tt_local_entry, common.rcu);
call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu);
}
/**
@ -233,6 +256,20 @@ batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry)
batadv_tt_local_entry_release);
}
/**
* batadv_tt_global_entry_free_rcu - free the tt_global_entry
* @rcu: rcu pointer of the tt_global_entry
*/
static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu)
{
struct batadv_tt_global_entry *tt_global_entry;
tt_global_entry = container_of(rcu, struct batadv_tt_global_entry,
common.rcu);
kmem_cache_free(batadv_tg_cache, tt_global_entry);
}
/**
* batadv_tt_global_entry_release - release tt_global_entry from lists and queue
* for free after rcu grace period
@ -246,7 +283,8 @@ static void batadv_tt_global_entry_release(struct kref *ref)
common.refcount);
batadv_tt_global_del_orig_list(tt_global_entry);
kfree_rcu(tt_global_entry, common.rcu);
call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu);
}
/**
@ -383,6 +421,19 @@ static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node,
batadv_tt_global_size_mod(orig_node, vid, -1);
}
/**
* batadv_tt_orig_list_entry_free_rcu - free the orig_entry
* @rcu: rcu pointer of the orig_entry
*/
static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu)
{
struct batadv_tt_orig_list_entry *orig_entry;
orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu);
kmem_cache_free(batadv_tt_orig_cache, orig_entry);
}
/**
* batadv_tt_orig_list_entry_release - release tt orig entry from lists and
* queue for free after rcu grace period
@ -396,7 +447,7 @@ static void batadv_tt_orig_list_entry_release(struct kref *ref)
refcount);
batadv_orig_node_put(orig_entry->orig_node);
kfree_rcu(orig_entry, rcu);
call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu);
}
/**
@ -426,7 +477,7 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv,
bool event_removed = false;
bool del_op_requested, del_op_entry;
tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC);
tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC);
if (!tt_change_node)
return;
@ -467,8 +518,8 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv,
continue;
del:
list_del(&entry->list);
kfree(entry);
kfree(tt_change_node);
kmem_cache_free(batadv_tt_change_cache, entry);
kmem_cache_free(batadv_tt_change_cache, tt_change_node);
event_removed = true;
goto unlock;
}
@ -646,7 +697,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
goto out;
}
tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC);
tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC);
if (!tt_local)
goto out;
@ -656,7 +707,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
net_ratelimited_function(batadv_info, soft_iface,
"adding TT local entry %pM to non-existent VLAN %d\n",
addr, BATADV_PRINT_VID(vid));
kfree(tt_local);
kmem_cache_free(batadv_tl_cache, tt_local);
tt_local = NULL;
goto out;
}
@ -959,7 +1010,7 @@ static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv)
tt_diff_entries_count++;
}
list_del(&entry->list);
kfree(entry);
kmem_cache_free(batadv_tt_change_cache, entry);
}
spin_unlock_bh(&bat_priv->tt.changes_list_lock);
@ -1259,7 +1310,7 @@ static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv)
list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
list) {
list_del(&entry->list);
kfree(entry);
kmem_cache_free(batadv_tt_change_cache, entry);
}
atomic_set(&bat_priv->tt.local_changes, 0);
@ -1341,7 +1392,7 @@ batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
goto out;
}
orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC);
orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC);
if (!orig_entry)
goto out;
@ -1411,7 +1462,8 @@ static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
goto out;
if (!tt_global_entry) {
tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC);
tt_global_entry = kmem_cache_zalloc(batadv_tg_cache,
GFP_ATOMIC);
if (!tt_global_entry)
goto out;
@ -2280,7 +2332,7 @@ static void batadv_tt_req_node_release(struct kref *ref)
tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount);
kfree(tt_req_node);
kmem_cache_free(batadv_tt_req_cache, tt_req_node);
}
/**
@ -2367,7 +2419,7 @@ batadv_tt_req_node_new(struct batadv_priv *bat_priv,
goto unlock;
}
tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC);
tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC);
if (!tt_req_node)
goto unlock;
@ -3104,7 +3156,7 @@ static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) {
list_del(&node->list);
kfree(node);
kmem_cache_free(batadv_tt_roam_cache, node);
}
spin_unlock_bh(&bat_priv->tt.roam_list_lock);
@ -3121,7 +3173,7 @@ static void batadv_tt_roam_purge(struct batadv_priv *bat_priv)
continue;
list_del(&node->list);
kfree(node);
kmem_cache_free(batadv_tt_roam_cache, node);
}
spin_unlock_bh(&bat_priv->tt.roam_list_lock);
}
@ -3162,7 +3214,8 @@ static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client)
}
if (!ret) {
tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC);
tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache,
GFP_ATOMIC);
if (!tt_roam_node)
goto unlock;
@ -3865,3 +3918,85 @@ bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
return ret;
}
/**
* batadv_tt_cache_init - Initialize tt memory object cache
*
* Return: 0 on success or negative error number in case of failure.
*/
int __init batadv_tt_cache_init(void)
{
size_t tl_size = sizeof(struct batadv_tt_local_entry);
size_t tg_size = sizeof(struct batadv_tt_global_entry);
size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry);
size_t tt_change_size = sizeof(struct batadv_tt_change_node);
size_t tt_req_size = sizeof(struct batadv_tt_req_node);
size_t tt_roam_size = sizeof(struct batadv_tt_roam_node);
batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tl_cache)
return -ENOMEM;
batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tg_cache)
goto err_tt_tl_destroy;
batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache",
tt_orig_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tt_orig_cache)
goto err_tt_tg_destroy;
batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache",
tt_change_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tt_change_cache)
goto err_tt_orig_destroy;
batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache",
tt_req_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tt_req_cache)
goto err_tt_change_destroy;
batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache",
tt_roam_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tt_roam_cache)
goto err_tt_req_destroy;
return 0;
err_tt_req_destroy:
kmem_cache_destroy(batadv_tt_req_cache);
batadv_tt_req_cache = NULL;
err_tt_change_destroy:
kmem_cache_destroy(batadv_tt_change_cache);
batadv_tt_change_cache = NULL;
err_tt_orig_destroy:
kmem_cache_destroy(batadv_tt_orig_cache);
batadv_tt_orig_cache = NULL;
err_tt_tg_destroy:
kmem_cache_destroy(batadv_tg_cache);
batadv_tg_cache = NULL;
err_tt_tl_destroy:
kmem_cache_destroy(batadv_tl_cache);
batadv_tl_cache = NULL;
return -ENOMEM;
}
/**
* batadv_tt_cache_destroy - Destroy tt memory object cache
*/
void batadv_tt_cache_destroy(void)
{
kmem_cache_destroy(batadv_tl_cache);
kmem_cache_destroy(batadv_tg_cache);
kmem_cache_destroy(batadv_tt_orig_cache);
kmem_cache_destroy(batadv_tt_change_cache);
kmem_cache_destroy(batadv_tt_req_cache);
kmem_cache_destroy(batadv_tt_roam_cache);
}

3
net/batman-adv/translation-table.h
View File

@ -59,4 +59,7 @@ bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
const u8 *addr, unsigned short vid);
int batadv_tt_cache_init(void);
void batadv_tt_cache_destroy(void);
#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */

51
net/batman-adv/types.h
View File

@ -132,7 +132,6 @@ struct batadv_hard_iface_bat_v {
* @rcu: struct used for freeing in an RCU-safe manner
* @bat_iv: per hard-interface B.A.T.M.A.N. IV data
* @bat_v: per hard-interface B.A.T.M.A.N. V data
* @cleanup_work: work queue callback item for hard-interface deinit
* @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
* @neigh_list: list of unique single hop neighbors via this interface
* @neigh_list_lock: lock protecting neigh_list
@ -152,7 +151,6 @@ struct batadv_hard_iface {
#ifdef CONFIG_BATMAN_ADV_BATMAN_V
struct batadv_hard_iface_bat_v bat_v;
#endif
struct work_struct cleanup_work;
struct dentry *debug_dir;
struct hlist_head neigh_list;
/* neigh_list_lock protects: neigh_list */
@ -1015,7 +1013,6 @@ struct batadv_priv_bat_v {
* @forw_bcast_list_lock: lock protecting forw_bcast_list
* @tp_list_lock: spinlock protecting @tp_list
* @orig_work: work queue callback item for orig node purging
* @cleanup_work: work queue callback item for soft-interface deinit
* @primary_if: one of the hard-interfaces assigned to this mesh interface
* becomes the primary interface
* @algo_ops: routing algorithm used by this mesh interface
@ -1074,7 +1071,6 @@ struct batadv_priv {
spinlock_t tp_list_lock; /* protects tp_list */
atomic_t tp_num;
struct delayed_work orig_work;
struct work_struct cleanup_work;
struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */
struct batadv_algo_ops *algo_ops;
struct hlist_head softif_vlan_list;
@ -1379,6 +1375,7 @@ struct batadv_skb_cb {
* locally generated packet
* @if_outgoing: packet where the packet should be sent to, or NULL if
* unspecified
* @queue_left: The queue (counter) this packet was applied to
*/
struct batadv_forw_packet {
struct hlist_node list;
@ -1391,11 +1388,13 @@ struct batadv_forw_packet {
struct delayed_work delayed_work;
struct batadv_hard_iface *if_incoming;
struct batadv_hard_iface *if_outgoing;
atomic_t *queue_left;
};
/**
* struct batadv_algo_iface_ops - mesh algorithm callbacks (interface specific)
* @activate: start routing mechanisms when hard-interface is brought up
* (optional)
* @enable: init routing info when hard-interface is enabled
* @disable: de-init routing info when hard-interface is disabled
* @update_mac: (re-)init mac addresses of the protocol information
@ -1413,6 +1412,7 @@ struct batadv_algo_iface_ops {
/**
* struct batadv_algo_neigh_ops - mesh algorithm callbacks (neighbour specific)
* @hardif_init: called on creation of single hop entry
* (optional)
* @cmp: compare the metrics of two neighbors for their respective outgoing
* interfaces
* @is_similar_or_better: check if neigh1 is equally similar or better than
@ -1435,11 +1435,11 @@ struct batadv_algo_neigh_ops {
/**
* struct batadv_algo_orig_ops - mesh algorithm callbacks (originator specific)
* @free: free the resources allocated by the routing algorithm for an orig_node
* object
* object (optional)
* @add_if: ask the routing algorithm to apply the needed changes to the
* orig_node due to a new hard-interface being added into the mesh
* orig_node due to a new hard-interface being added into the mesh (optional)
* @del_if: ask the routing algorithm to apply the needed changes to the
* orig_node due to an hard-interface being removed from the mesh
* orig_node due to an hard-interface being removed from the mesh (optional)
* @print: print the originator table (optional)
*/
struct batadv_algo_orig_ops {
@ -1451,6 +1451,28 @@ struct batadv_algo_orig_ops {
struct batadv_hard_iface *hard_iface);
};
/**
* struct batadv_algo_gw_ops - mesh algorithm callbacks (GW specific)
* @store_sel_class: parse and stores a new GW selection class (optional)
* @show_sel_class: prints the current GW selection class (optional)
* @get_best_gw_node: select the best GW from the list of available nodes
* (optional)
* @is_eligible: check if a newly discovered GW is a potential candidate for
* the election as best GW (optional)
* @print: print the gateway table (optional)
*/
struct batadv_algo_gw_ops {
ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff,
size_t count);
ssize_t (*show_sel_class)(struct batadv_priv *bat_priv, char *buff);
struct batadv_gw_node *(*get_best_gw_node)
(struct batadv_priv *bat_priv);
bool (*is_eligible)(struct batadv_priv *bat_priv,
struct batadv_orig_node *curr_gw_orig,
struct batadv_orig_node *orig_node);
void (*print)(struct batadv_priv *bat_priv, struct seq_file *seq);
};
/**
* struct batadv_algo_ops - mesh algorithm callbacks
* @list: list node for the batadv_algo_list
@ -1458,6 +1480,7 @@ struct batadv_algo_orig_ops {
* @iface: callbacks related to interface handling
* @neigh: callbacks related to neighbors handling
* @orig: callbacks related to originators handling
* @gw: callbacks related to GW mode
*/
struct batadv_algo_ops {
struct hlist_node list;
@ -1465,6 +1488,7 @@ struct batadv_algo_ops {
struct batadv_algo_iface_ops iface;
struct batadv_algo_neigh_ops neigh;
struct batadv_algo_orig_ops orig;
struct batadv_algo_gw_ops gw;
};
/**
@ -1564,4 +1588,17 @@ enum batadv_tvlv_handler_flags {
BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
};
/**
* struct batadv_store_mesh_work - Work queue item to detach add/del interface
* from sysfs locks
* @net_dev: netdevice to add/remove to/from batman-adv soft-interface
* @soft_iface_name: name of soft-interface to modify
* @work: work queue item
*/
struct batadv_store_mesh_work {
struct net_device *net_dev;
char soft_iface_name[IFNAMSIZ];
struct work_struct work;
};
#endif /* _NET_BATMAN_ADV_TYPES_H_ */