[B.A.T.M.A.N.] [PATCH 17/26] Staging: batman-adv: move /proc interface handling to /sys

From: Marek Lindner lindner_marek@yahoo.de

Instead of having a single /proc file "interfaces" in which you have to echo the wanted interface batman-adv will create a subfolder in each suitable /sys/class/net folder. This subfolder contains files for the interface specific settings. For example, mesh_iface to add/remove an interface from a virtual mesh network (at the moment only bat0 is supported).

Example: echo bat0 > /sys/class/net/eth0/batman-adv/mesh_iface

to deactivate: echo none > /sys/class/net/eth0/batman-adv/mesh_iface

Interfaces which are not compatible with batman-adv won't contain the batman-adv folder, therefore can't be activated. Not supported are: loopback, non-ethernet, non-ARP and virtual mesh network interfaces

Signed-off-by: Marek Lindner lindner_marek@yahoo.de Signed-off-by: Andrew Lunn andrew@lunn.ch --- drivers/staging/batman-adv/Makefile | 2 +- drivers/staging/batman-adv/bat_sysfs.c | 147 +++++++ drivers/staging/batman-adv/bat_sysfs.h | 3 + drivers/staging/batman-adv/device.c | 2 +- drivers/staging/batman-adv/hard-interface.c | 515 ++++++++++++------------ drivers/staging/batman-adv/hard-interface.h | 18 +- drivers/staging/batman-adv/main.c | 21 +- drivers/staging/batman-adv/main.h | 3 +- drivers/staging/batman-adv/originator.c | 193 ++++++++- drivers/staging/batman-adv/originator.h | 2 + drivers/staging/batman-adv/proc.c | 170 -------- drivers/staging/batman-adv/proc.h | 30 -- drivers/staging/batman-adv/routing.c | 6 +- drivers/staging/batman-adv/send.c | 59 ++- drivers/staging/batman-adv/send.h | 2 +- drivers/staging/batman-adv/soft-interface.c | 2 +- drivers/staging/batman-adv/translation-table.c | 14 +- drivers/staging/batman-adv/types.h | 5 +- drivers/staging/batman-adv/vis.c | 9 +- 19 files changed, 670 insertions(+), 533 deletions(-) delete mode 100644 drivers/staging/batman-adv/proc.c delete mode 100644 drivers/staging/batman-adv/proc.h

diff --git a/drivers/staging/batman-adv/Makefile b/drivers/staging/batman-adv/Makefile index 9ad0429..f25068c 100644 --- a/drivers/staging/batman-adv/Makefile +++ b/drivers/staging/batman-adv/Makefile @@ -19,4 +19,4 @@ #

obj-m += batman-adv.o -batman-adv-objs := main.o proc.o send.o routing.o soft-interface.o device.o translation-table.o bitarray.o hash.o ring_buffer.o vis.o hard-interface.o aggregation.o originator.o bat_sysfs.o +batman-adv-objs := main.o send.o routing.o soft-interface.o device.o translation-table.o bitarray.o hash.o ring_buffer.o vis.o hard-interface.o aggregation.o originator.o bat_sysfs.o diff --git a/drivers/staging/batman-adv/bat_sysfs.c b/drivers/staging/batman-adv/bat_sysfs.c index ea7ce77..1811c8d 100644 --- a/drivers/staging/batman-adv/bat_sysfs.c +++ b/drivers/staging/batman-adv/bat_sysfs.c @@ -36,6 +36,14 @@ struct bat_attribute { char *buf, size_t count); };

+struct hardif_attribute { + struct attribute attr; + ssize_t (*show)(struct kobject *kobj, struct attribute *attr, + char *buf); + ssize_t (*store)(struct kobject *kobj, struct attribute *attr, + char *buf, size_t count); +}; + #define BAT_ATTR(_name, _mode, _show, _store) \ struct bat_attribute bat_attr_##_name = { \ .attr = {.name = __stringify(_name), \ @@ -52,6 +60,14 @@ struct bin_attribute bat_attr_##_name = { \ .write = _write, \ };

+#define HARDIF_ATTR(_name, _mode, _show, _store) \ +struct hardif_attribute hardif_attr_##_name = { \ + .attr = {.name = __stringify(_name), \ + .mode = _mode }, \ + .show = _show, \ + .store = _store, \ +}; + static ssize_t show_aggr_ogm(struct kobject *kobj, struct attribute *attr, char *buff) { @@ -275,6 +291,8 @@ int sysfs_add_meshif(struct net_device *dev) atomic_set(&bat_priv->aggregation_enabled, 1); atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE); atomic_set(&bat_priv->orig_interval, 1000); + bat_priv->primary_if = NULL; + bat_priv->num_ifaces = 0;

bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR, batif_kobject); @@ -335,3 +353,132 @@ void sysfs_del_meshif(struct net_device *dev) kobject_put(bat_priv->mesh_obj); bat_priv->mesh_obj = NULL; } + +static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr, + char *buff) +{ + struct device *dev = to_dev(kobj->parent); + struct net_device *net_dev = to_net_dev(dev); + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev); + + if (!batman_if) + return 0; + + return sprintf(buff, "status: %s\ncommands: none, bat0 \n", + batman_if->if_status == IF_NOT_IN_USE ? + "none" : "bat0"); +} + +static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr, + char *buff, size_t count) +{ + struct device *dev = to_dev(kobj->parent); + struct net_device *net_dev = to_net_dev(dev); + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev); + int status_tmp = -1; + + if (!batman_if) + return count; + + if (strncmp(buff, "none", 4) == 0) + status_tmp = IF_NOT_IN_USE; + + if (strncmp(buff, "bat0", 4) == 0) + status_tmp = IF_I_WANT_YOU; + + if (status_tmp < 0) { + if (buff[count - 1] == '\n') + buff[count - 1] = '\0'; + + printk(KERN_ERR "batman-adv:Invalid parameter for 'mesh_iface' setting received: %s\n", + buff); + return -EINVAL; + } + + if ((batman_if->if_status == status_tmp) || + ((status_tmp == IF_I_WANT_YOU) && + (batman_if->if_status != IF_NOT_IN_USE))) + return count; + + if (status_tmp == IF_I_WANT_YOU) + status_tmp = hardif_enable_interface(batman_if); + else + hardif_disable_interface(batman_if); + + return (status_tmp < 0 ? status_tmp : count); +} + +static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr, + char *buff) +{ + struct device *dev = to_dev(kobj->parent); + struct net_device *net_dev = to_net_dev(dev); + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev); + + if (!batman_if) + return 0; + + switch (batman_if->if_status) { + case IF_TO_BE_REMOVED: + return sprintf(buff, "disabling\n"); + case IF_INACTIVE: + return sprintf(buff, "inactive\n"); + case IF_ACTIVE: + return sprintf(buff, "active\n"); + case IF_TO_BE_ACTIVATED: + return sprintf(buff, "enabling\n"); + case IF_NOT_IN_USE: + default: + return sprintf(buff, "not in use\n"); + } +} + +static HARDIF_ATTR(mesh_iface, S_IRUGO | S_IWUSR, + show_mesh_iface, store_mesh_iface); +static HARDIF_ATTR(iface_status, S_IRUGO, show_iface_status, NULL); + +static struct hardif_attribute *batman_attrs[] = { + &hardif_attr_mesh_iface, + &hardif_attr_iface_status, + NULL, +}; + +int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev) +{ + struct kobject *hardif_kobject = &dev->dev.kobj; + struct hardif_attribute **hardif_attr; + int err; + + *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR, + hardif_kobject); + + if (!*hardif_obj) { + printk(KERN_ERR "batman-adv:Can't add sysfs directory: %s/%s\n", + dev->name, SYSFS_IF_BAT_SUBDIR); + goto out; + } + + for (hardif_attr = batman_attrs; *hardif_attr; ++hardif_attr) { + err = sysfs_create_file(*hardif_obj, &((*hardif_attr)->attr)); + if (err) { + printk(KERN_ERR "batman-adv:Can't add sysfs file: %s/%s/%s\n", + dev->name, SYSFS_IF_BAT_SUBDIR, + ((*hardif_attr)->attr).name); + goto rem_attr; + } + } + + return 0; + +rem_attr: + for (hardif_attr = batman_attrs; *hardif_attr; ++hardif_attr) + sysfs_remove_file(*hardif_obj, &((*hardif_attr)->attr)); +out: + return -ENOMEM; +} + +void sysfs_del_hardif(struct kobject **hardif_obj) +{ + kobject_put(*hardif_obj); + *hardif_obj = NULL; +} diff --git a/drivers/staging/batman-adv/bat_sysfs.h b/drivers/staging/batman-adv/bat_sysfs.h index 671ebd1..e189341 100644 --- a/drivers/staging/batman-adv/bat_sysfs.h +++ b/drivers/staging/batman-adv/bat_sysfs.h @@ -21,6 +21,9 @@

#define SYSFS_IF_MESH_SUBDIR "mesh" +#define SYSFS_IF_BAT_SUBDIR "batman_adv"

int sysfs_add_meshif(struct net_device *dev); void sysfs_del_meshif(struct net_device *dev); +int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev); +void sysfs_del_hardif(struct kobject **hardif_obj); diff --git a/drivers/staging/batman-adv/device.c b/drivers/staging/batman-adv/device.c index c419c62..b2ecba2 100644 --- a/drivers/staging/batman-adv/device.c +++ b/drivers/staging/batman-adv/device.c @@ -258,7 +258,7 @@ ssize_t bat_device_write(struct file *file, const char __user *buff, if (!batman_if) goto dst_unreach;

- if (batman_if->if_active != IF_ACTIVE) + if (batman_if->if_status != IF_ACTIVE) goto dst_unreach;

memcpy(icmp_packet.orig, diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c index cb9e927..b82cae7 100644 --- a/drivers/staging/batman-adv/hard-interface.c +++ b/drivers/staging/batman-adv/hard-interface.c @@ -25,22 +25,21 @@ #include "send.h" #include "translation-table.h" #include "routing.h" +#include "bat_sysfs.h" +#include "originator.h" #include "hash.h"

-#define MIN(x, y) ((x) < (y) ? (x) : (y)) - -static char avail_ifs; -static char active_ifs; +#include <linux/if_arp.h>

-static void hardif_free_interface(struct rcu_head *rcu); +#define MIN(x, y) ((x) < (y) ? (x) : (y))

-static struct batman_if *get_batman_if_by_name(char *name) +struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev) { struct batman_if *batman_if;

rcu_read_lock(); list_for_each_entry_rcu(batman_if, &if_list, list) { - if (strncmp(batman_if->dev, name, IFNAMSIZ) == 0) + if (batman_if->net_dev == net_dev) goto out; }

@@ -51,23 +50,90 @@ out: return batman_if; }

-int hardif_min_mtu(void) +static int is_valid_iface(struct net_device *net_dev) +{ + if (net_dev->flags & IFF_LOOPBACK) + return 0; + + if (net_dev->type != ARPHRD_ETHER) + return 0; + + if (net_dev->addr_len != ETH_ALEN) + return 0; + + /* no batman over batman */ +#ifdef HAVE_NET_DEVICE_OPS + if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) + return 0; +#else + if (net_dev->hard_start_xmit == interface_tx) + return 0; +#endif + + /* Device is being bridged */ + /* if (net_dev->br_port != NULL) + return 0; */ + + return 1; +} + +static struct batman_if *get_active_batman_if(void) { struct batman_if *batman_if; - /* allow big frames if all devices are capable to do so - * (have MTU > 1500 + BAT_HEADER_LEN) */ - int min_mtu = ETH_DATA_LEN;

+ /* TODO: should check interfaces belonging to bat_priv */ rcu_read_lock(); list_for_each_entry_rcu(batman_if, &if_list, list) { - if ((batman_if->if_active == IF_ACTIVE) || - (batman_if->if_active == IF_TO_BE_ACTIVATED)) - min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN, - min_mtu); + if (batman_if->if_status == IF_ACTIVE) + goto out; } + + batman_if = NULL; + +out: rcu_read_unlock(); + return batman_if; +}

- return min_mtu; +static void set_primary_if(struct bat_priv *bat_priv, + struct batman_if *batman_if) +{ + struct batman_packet *batman_packet; + + bat_priv->primary_if = batman_if; + + if (!bat_priv->primary_if) + return; + + set_main_if_addr(batman_if->net_dev->dev_addr); + + batman_packet = (struct batman_packet *)(batman_if->packet_buff); + batman_packet->flags = 0; + batman_packet->ttl = TTL; + + /*** + * hacky trick to make sure that we send the HNA information via + * our new primary interface + */ + atomic_set(&hna_local_changed, 1); +} + +static bool hardif_is_iface_up(struct batman_if *batman_if) +{ + if (batman_if->net_dev->flags & IFF_UP) + return true; + + return false; +} + +static void update_mac_addresses(struct batman_if *batman_if) +{ + addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr); + + memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig, + batman_if->net_dev->dev_addr, ETH_ALEN); + memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender, + batman_if->net_dev->dev_addr, ETH_ALEN); }

static void check_known_mac_addr(uint8_t *addr) @@ -76,8 +142,8 @@ static void check_known_mac_addr(uint8_t *addr)

rcu_read_lock(); list_for_each_entry_rcu(batman_if, &if_list, list) { - if ((batman_if->if_active != IF_ACTIVE) && - (batman_if->if_active != IF_TO_BE_ACTIVATED)) + if ((batman_if->if_status != IF_ACTIVE) && + (batman_if->if_status != IF_TO_BE_ACTIVATED)) continue;

if (!compare_orig(batman_if->net_dev->dev_addr, addr)) @@ -90,6 +156,25 @@ static void check_known_mac_addr(uint8_t *addr) rcu_read_unlock(); }

+int hardif_min_mtu(void) +{ + struct batman_if *batman_if; + /* allow big frames if all devices are capable to do so + * (have MTU > 1500 + BAT_HEADER_LEN) */ + int min_mtu = ETH_DATA_LEN; + + rcu_read_lock(); + list_for_each_entry_rcu(batman_if, &if_list, list) { + if ((batman_if->if_status == IF_ACTIVE) || + (batman_if->if_status == IF_TO_BE_ACTIVATED)) + min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN, + min_mtu); + } + rcu_read_unlock(); + + return min_mtu; +} + /* adjusts the MTU if a new interface with a smaller MTU appeared. */ void update_min_mtu(void) { @@ -100,322 +185,246 @@ void update_min_mtu(void) soft_device->mtu = min_mtu; }

-/* checks if the interface is up. (returns 1 if it is) */ -static int hardif_is_interface_up(char *dev) +static void hardif_activate_interface(struct bat_priv *bat_priv, + struct batman_if *batman_if) { - struct net_device *net_dev; + if (batman_if->if_status != IF_INACTIVE) + return;

- /** - * if we already have an interface in our interface list and - * the current interface is not the primary interface and - * the primary interface is not up and - * the primary interface has never been up - don't activate any - * secondary interface ! - */ + dev_hold(batman_if->net_dev);

- rcu_read_lock(); - if ((!list_empty(&if_list)) && - strncmp(((struct batman_if *)if_list.next)->dev, dev, IFNAMSIZ) && - !(((struct batman_if *)if_list.next)->if_active == IF_ACTIVE) && - !(((struct batman_if *)if_list.next)->if_active == IF_TO_BE_ACTIVATED) && - (!main_if_was_up())) { - rcu_read_unlock(); - goto end; - } - rcu_read_unlock(); + update_mac_addresses(batman_if); + batman_if->if_status = IF_TO_BE_ACTIVATED;

-#ifdef __NET_NET_NAMESPACE_H - net_dev = dev_get_by_name(&init_net, dev); -#else - net_dev = dev_get_by_name(dev); -#endif - if (!net_dev) - goto end; + /** + * the first active interface becomes our primary interface or + * the next active interface after the old primay interface was removed + */ + if (!bat_priv->primary_if) + set_primary_if(bat_priv, batman_if);

- if (!(net_dev->flags & IFF_UP)) - goto failure; + printk(KERN_INFO "batman-adv:Interface activated: %s\n", + batman_if->dev);

- dev_put(net_dev); - return 1; + if (atomic_read(&module_state) == MODULE_INACTIVE) + activate_module();

-failure: - dev_put(net_dev); -end: - return 0; + update_min_mtu(); + return; }

-/* deactivates the interface. */ -void hardif_deactivate_interface(struct batman_if *batman_if) +static void hardif_deactivate_interface(struct batman_if *batman_if) { - if (batman_if->if_active != IF_ACTIVE) + if ((batman_if->if_status != IF_ACTIVE) && + (batman_if->if_status != IF_TO_BE_ACTIVATED)) return;

- /** - * batman_if->net_dev has been acquired by dev_get_by_name() in - * proc_interfaces_write() and has to be unreferenced. - */ - - if (batman_if->net_dev) - dev_put(batman_if->net_dev); + dev_put(batman_if->net_dev);

- batman_if->if_active = IF_INACTIVE; - active_ifs--; + batman_if->if_status = IF_INACTIVE;

printk(KERN_INFO "batman-adv:Interface deactivated: %s\n", - batman_if->dev); + batman_if->dev); + + update_min_mtu(); }

-/* (re)activate given interface. */ -static void hardif_activate_interface(struct batman_if *batman_if) +int hardif_enable_interface(struct batman_if *batman_if) { - if (batman_if->if_active != IF_INACTIVE) - return; - -#ifdef __NET_NET_NAMESPACE_H - batman_if->net_dev = dev_get_by_name(&init_net, batman_if->dev); -#else - batman_if->net_dev = dev_get_by_name(batman_if->dev); -#endif - if (!batman_if->net_dev) - goto dev_err; + /* FIXME: each batman_if will be attached to a softif */ + struct bat_priv *bat_priv = netdev_priv(soft_device); + struct batman_packet *batman_packet;

- check_known_mac_addr(batman_if->net_dev->dev_addr); + if (batman_if->if_status != IF_NOT_IN_USE) + goto out;

- addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr); + batman_if->packet_len = BAT_PACKET_LEN; + batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC);

- memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig, - batman_if->net_dev->dev_addr, ETH_ALEN); - memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender, - batman_if->net_dev->dev_addr, ETH_ALEN); + if (!batman_if->packet_buff) { + printk(KERN_ERR "batman-adv:Can't add interface packet (%s): out of memory\n", + batman_if->dev); + goto err; + }

- batman_if->if_active = IF_TO_BE_ACTIVATED; - active_ifs++; + batman_packet = (struct batman_packet *)(batman_if->packet_buff); + batman_packet->packet_type = BAT_PACKET; + batman_packet->version = COMPAT_VERSION; + batman_packet->flags = 0; + batman_packet->ttl = 2; + batman_packet->tq = TQ_MAX_VALUE; + batman_packet->num_hna = 0;

- /* save the mac address if it is our primary interface */ - if (batman_if->if_num == 0) - set_main_if_addr(batman_if->net_dev->dev_addr); + batman_if->if_num = bat_priv->num_ifaces; + bat_priv->num_ifaces++; + batman_if->if_status = IF_INACTIVE; + orig_hash_add_if(batman_if, bat_priv->num_ifaces);

- printk(KERN_INFO "batman-adv:Interface activated: %s\n", - batman_if->dev); + atomic_set(&batman_if->seqno, 1); + printk(KERN_INFO "batman-adv:Adding interface: %s\n", batman_if->dev);

- return; + if (hardif_is_iface_up(batman_if)) + hardif_activate_interface(bat_priv, batman_if); + else + printk(KERN_ERR "batman-adv:Not using interface %s (retrying later): interface not active\n", batman_if->dev);

-dev_err: - batman_if->net_dev = NULL; -} + /* begin scheduling originator messages on that interface */ + schedule_own_packet(batman_if);

-static void hardif_free_interface(struct rcu_head *rcu) -{ - struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu); +out: + return 0;

- kfree(batman_if->packet_buff); - kfree(batman_if->dev); - kfree(batman_if); +err: + return -ENOMEM; }

-/** - * called by - * - echo '' > /proc/.../interfaces - * - modprobe -r batman-adv-core - */ -/* removes and frees all interfaces */ -void hardif_remove_interfaces(void) +void hardif_disable_interface(struct batman_if *batman_if) { - struct batman_if *batman_if = NULL; - - avail_ifs = 0; - - /* no lock needed - we don't delete somewhere else */ - list_for_each_entry(batman_if, &if_list, list) { - - list_del_rcu(&batman_if->list); + /* FIXME: each batman_if will be attached to a softif */ + struct bat_priv *bat_priv = netdev_priv(soft_device);

- /* first deactivate interface */ - if (batman_if->if_active != IF_INACTIVE) - hardif_deactivate_interface(batman_if); - - call_rcu(&batman_if->rcu, hardif_free_interface); - } -} - -static int resize_orig(struct orig_node *orig_node, int if_num) -{ - void *data_ptr; + if (batman_if->if_status == IF_ACTIVE) + hardif_deactivate_interface(batman_if);

- data_ptr = kmalloc((if_num + 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS, - GFP_ATOMIC); - if (!data_ptr) { - printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n"); - return -1; - } + if (batman_if->if_status != IF_INACTIVE) + return;

- memcpy(data_ptr, orig_node->bcast_own, - if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS); - kfree(orig_node->bcast_own); - orig_node->bcast_own = data_ptr; + printk(KERN_INFO "batman-adv:Removing interface: %s\n", batman_if->dev); + bat_priv->num_ifaces--; + orig_hash_del_if(batman_if, bat_priv->num_ifaces);

- data_ptr = kmalloc((if_num + 1) * sizeof(uint8_t), GFP_ATOMIC); - if (!data_ptr) { - printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n"); - return -1; - } + if (batman_if == bat_priv->primary_if) + set_primary_if(bat_priv, get_active_batman_if());

- memcpy(data_ptr, orig_node->bcast_own_sum, if_num * sizeof(uint8_t)); - kfree(orig_node->bcast_own_sum); - orig_node->bcast_own_sum = data_ptr; + kfree(batman_if->packet_buff); + batman_if->packet_buff = NULL; + batman_if->if_status = IF_NOT_IN_USE;

- return 0; + if ((atomic_read(&module_state) == MODULE_ACTIVE) && + (bat_priv->num_ifaces == 0)) + deactivate_module(); }

- -/* adds an interface the interface list and activate it, if possible */ -int hardif_add_interface(char *dev, int if_num) +static struct batman_if *hardif_add_interface(struct net_device *net_dev) { struct batman_if *batman_if; - struct batman_packet *batman_packet; - struct orig_node *orig_node; - unsigned long flags; - HASHIT(hashit); + int ret;

- batman_if = kmalloc(sizeof(struct batman_if), GFP_KERNEL); + ret = is_valid_iface(net_dev); + if (ret != 1) + goto out;

+ batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC); if (!batman_if) { - printk(KERN_ERR "batman-adv:Can't add interface (%s): out of memory\n", dev); - return -1; - } - - batman_if->net_dev = NULL; - - if ((if_num == 0) && (num_hna > 0)) - batman_if->packet_len = BAT_PACKET_LEN + num_hna * ETH_ALEN; - else - batman_if->packet_len = BAT_PACKET_LEN; - - batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_KERNEL); - - if (!batman_if->packet_buff) { - printk(KERN_ERR "batman-adv:Can't add interface packet (%s): out of memory\n", dev); + printk(KERN_ERR "batman-adv:Can't add interface (%s): out of memory\n", + net_dev->name); goto out; }

- batman_if->if_num = if_num; - batman_if->dev = dev; - batman_if->if_active = IF_INACTIVE; - INIT_RCU_HEAD(&batman_if->rcu); + batman_if->dev = kstrdup(net_dev->name, GFP_ATOMIC); + if (!batman_if->dev) + goto free_if;

- printk(KERN_INFO "batman-adv:Adding interface: %s\n", dev); - avail_ifs++; + ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev); + if (ret) + goto free_dev;

+ batman_if->if_num = -1; + batman_if->net_dev = net_dev; + batman_if->if_status = IF_NOT_IN_USE; + INIT_RCU_HEAD(&batman_if->rcu); INIT_LIST_HEAD(&batman_if->list);

- batman_packet = (struct batman_packet *)(batman_if->packet_buff); - batman_packet->packet_type = BAT_PACKET; - batman_packet->version = COMPAT_VERSION; - batman_packet->flags = 0x00; - batman_packet->ttl = (batman_if->if_num > 0 ? 2 : TTL); - batman_packet->flags = 0; - batman_packet->tq = TQ_MAX_VALUE; - batman_packet->num_hna = 0; - - if (batman_if->packet_len != BAT_PACKET_LEN) { - unsigned char *hna_buff; - int hna_len; - - hna_buff = batman_if->packet_buff + BAT_PACKET_LEN; - hna_len = batman_if->packet_len - BAT_PACKET_LEN; - batman_packet->num_hna = hna_local_fill_buffer(hna_buff, - hna_len); - } - - atomic_set(&batman_if->seqno, 1); + check_known_mac_addr(batman_if->net_dev->dev_addr); + list_add_tail_rcu(&batman_if->list, &if_list); + return batman_if;

- /* resize all orig nodes because orig_node->bcast_own(_sum) depend on - * if_num */ - spin_lock_irqsave(&orig_hash_lock, flags); +free_dev: + kfree(batman_if->dev); +free_if: + kfree(batman_if); +out: + return NULL; +}

- while (hash_iterate(orig_hash, &hashit)) { - orig_node = hashit.bucket->data; - if (resize_orig(orig_node, if_num) == -1) { - spin_unlock_irqrestore(&orig_hash_lock, flags); - goto out; - } - } +static void hardif_free_interface(struct rcu_head *rcu) +{ + struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu);

- spin_unlock_irqrestore(&orig_hash_lock, flags); + /* delete all references to this batman_if */ + purge_orig(NULL); + purge_outstanding_packets(batman_if);

- if (!hardif_is_interface_up(batman_if->dev)) - printk(KERN_ERR "batman-adv:Not using interface %s (retrying later): interface not active\n", batman_if->dev); - else - hardif_activate_interface(batman_if); + kfree(batman_if->dev); + kfree(batman_if); +}

- list_add_tail_rcu(&batman_if->list, &if_list); +static void hardif_remove_interface(struct batman_if *batman_if) +{ + /* first deactivate interface */ + if (batman_if->if_status != IF_NOT_IN_USE) + hardif_disable_interface(batman_if);

- /* begin sending originator messages on that interface */ - schedule_own_packet(batman_if); - return 1; + if (batman_if->if_status != IF_NOT_IN_USE) + return;

-out: - kfree(batman_if->packet_buff); - kfree(batman_if); - kfree(dev); - return -1; + batman_if->if_status = IF_TO_BE_REMOVED; + list_del_rcu(&batman_if->list); + sysfs_del_hardif(&batman_if->hardif_obj); + call_rcu(&batman_if->rcu, hardif_free_interface); }

-char hardif_get_active_if_num(void) +void hardif_remove_interfaces(void) { - return active_ifs; + struct batman_if *batman_if, *batman_if_tmp; + + list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) + hardif_remove_interface(batman_if); }

static int hard_if_event(struct notifier_block *this, - unsigned long event, void *ptr) + unsigned long event, void *ptr) { - struct net_device *dev = (struct net_device *)ptr; - struct batman_if *batman_if = get_batman_if_by_name(dev->name); + struct net_device *net_dev = (struct net_device *)ptr; + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev); + /* FIXME: each batman_if will be attached to a softif */ + struct bat_priv *bat_priv = netdev_priv(soft_device); + + if (!batman_if) + batman_if = hardif_add_interface(net_dev);

if (!batman_if) goto out;

switch (event) { + case NETDEV_REGISTER: + break; + case NETDEV_UP: + hardif_activate_interface(bat_priv, batman_if); + break; case NETDEV_GOING_DOWN: case NETDEV_DOWN: - case NETDEV_UNREGISTER: hardif_deactivate_interface(batman_if); break; - case NETDEV_UP: - hardif_activate_interface(batman_if); - if ((atomic_read(&module_state) == MODULE_INACTIVE) && - (hardif_get_active_if_num() > 0)) { - activate_module(); - } + case NETDEV_UNREGISTER: + hardif_remove_interface(batman_if); + break; + case NETDEV_CHANGENAME: + break; + case NETDEV_CHANGEADDR: + check_known_mac_addr(batman_if->net_dev->dev_addr); + update_mac_addresses(batman_if); + if (batman_if == bat_priv->primary_if) + set_primary_if(bat_priv, batman_if); break; - /* NETDEV_CHANGEADDR - mac address change - what are we doing here ? */ default: break; };

- update_min_mtu(); - out: return NOTIFY_DONE; }

-/* find batman interface by netdev. assumes rcu_read_lock on */ -static struct batman_if *find_batman_if(struct net_device *dev) -{ - struct batman_if *batman_if; - - rcu_read_lock(); - list_for_each_entry_rcu(batman_if, &if_list, list) { - if (batman_if->net_dev == dev) { - rcu_read_unlock(); - return batman_if; - } - } - rcu_read_unlock(); - return NULL; -} - - /* receive a packet with the batman ethertype coming on a hard * interface */ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, @@ -444,12 +453,12 @@ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, || !skb_mac_header(skb))) goto err_free;

- batman_if = find_batman_if(skb->dev); + batman_if = get_batman_if_by_netdev(skb->dev); if (!batman_if) goto err_free;

/* discard frames on not active interfaces */ - if (batman_if->if_active != IF_ACTIVE) + if (batman_if->if_status != IF_ACTIVE) goto err_free;

stats = (struct net_device_stats *)dev_get_stats(skb->dev); diff --git a/drivers/staging/batman-adv/hard-interface.h b/drivers/staging/batman-adv/hard-interface.h index 4100a27..1e5fc3e 100644 --- a/drivers/staging/batman-adv/hard-interface.h +++ b/drivers/staging/batman-adv/hard-interface.h @@ -19,19 +19,19 @@ * */

-#define IF_INACTIVE 0 -#define IF_ACTIVE 1 -/* #define IF_TO_BE_DEACTIVATED 2 - not needed anymore */ -#define IF_TO_BE_ACTIVATED 3 +#define IF_NOT_IN_USE 0 +#define IF_TO_BE_REMOVED 1 +#define IF_INACTIVE 2 +#define IF_ACTIVE 3 +#define IF_TO_BE_ACTIVATED 4 +#define IF_I_WANT_YOU 5

extern struct notifier_block hard_if_notifier;

+struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev); +int hardif_enable_interface(struct batman_if *batman_if); +void hardif_disable_interface(struct batman_if *batman_if); void hardif_remove_interfaces(void); -int hardif_add_interface(char *dev, int if_num); -void hardif_deactivate_interface(struct batman_if *batman_if); -char hardif_get_active_if_num(void); -void hardif_check_interfaces_status(void); -void hardif_check_interfaces_status_wq(struct work_struct *work); int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, diff --git a/drivers/staging/batman-adv/main.c b/drivers/staging/batman-adv/main.c index 7d72685..c1e57aa 100644 --- a/drivers/staging/batman-adv/main.c +++ b/drivers/staging/batman-adv/main.c @@ -20,7 +20,6 @@ */

#include "main.h" -#include "proc.h" #include "bat_sysfs.h" #include "routing.h" #include "send.h" @@ -44,7 +43,6 @@ DEFINE_SPINLOCK(forw_bcast_list_lock);

atomic_t vis_interval; int16_t num_hna; -int16_t num_ifs;

struct net_device *soft_device;

@@ -89,10 +87,6 @@ int init_module(void) if (!bat_event_workqueue) return -ENOMEM;

- retval = setup_procfs(); - if (retval < 0) - return retval; - bat_device_init();

/* initialize layer 2 interface */ @@ -135,7 +129,10 @@ end:

void cleanup_module(void) { - shutdown_module(); + deactivate_module(); + + unregister_netdevice_notifier(&hard_if_notifier); + hardif_remove_interfaces();

if (soft_device) { sysfs_del_meshif(soft_device); @@ -145,9 +142,6 @@ void cleanup_module(void)

dev_remove_pack(&batman_adv_packet_type);

- unregister_netdevice_notifier(&hard_if_notifier); - cleanup_procfs(); - destroy_workqueue(bat_event_workqueue); bat_event_workqueue = NULL; } @@ -178,17 +172,17 @@ void activate_module(void)

err: printk(KERN_ERR "batman-adv:Unable to allocate memory for mesh information structures: out of mem ?\n"); - shutdown_module(); + deactivate_module(); end: return; }

/* shuts down the whole module.*/ -void shutdown_module(void) +void deactivate_module(void) { atomic_set(&module_state, MODULE_DEACTIVATING);

- purge_outstanding_packets(); + purge_outstanding_packets(NULL); flush_workqueue(bat_event_workqueue);

vis_quit(); @@ -203,7 +197,6 @@ void shutdown_module(void) synchronize_net(); bat_device_destroy();

- hardif_remove_interfaces(); synchronize_rcu(); atomic_set(&module_state, MODULE_INACTIVE); } diff --git a/drivers/staging/batman-adv/main.h b/drivers/staging/batman-adv/main.h index 59a70c7..247196c 100644 --- a/drivers/staging/batman-adv/main.h +++ b/drivers/staging/batman-adv/main.h @@ -129,7 +129,6 @@ extern spinlock_t forw_bcast_list_lock;

extern atomic_t vis_interval; extern int16_t num_hna; -extern int16_t num_ifs;

extern struct net_device *soft_device;

@@ -138,7 +137,7 @@ extern atomic_t module_state; extern struct workqueue_struct *bat_event_workqueue;

void activate_module(void); -void shutdown_module(void); +void deactivate_module(void); void inc_module_count(void); void dec_module_count(void); int addr_to_string(char *buff, uint8_t *addr); diff --git a/drivers/staging/batman-adv/originator.c b/drivers/staging/batman-adv/originator.c index 4152701..44bbe89 100644 --- a/drivers/staging/batman-adv/originator.c +++ b/drivers/staging/batman-adv/originator.c @@ -118,6 +118,8 @@ void free_orig_node(void *data) * address if it does not exits */ struct orig_node *get_orig_node(uint8_t *addr) { + /* FIXME: each batman_if will be attached to a softif */ + struct bat_priv *bat_priv = netdev_priv(soft_device); struct orig_node *orig_node; struct hashtable_t *swaphash; int size; @@ -139,13 +141,13 @@ struct orig_node *get_orig_node(uint8_t *addr) orig_node->router = NULL; orig_node->hna_buff = NULL;

- size = num_ifs * sizeof(TYPE_OF_WORD) * NUM_WORDS; + size = bat_priv->num_ifaces * sizeof(TYPE_OF_WORD) * NUM_WORDS;

orig_node->bcast_own = kzalloc(size, GFP_ATOMIC); if (!orig_node->bcast_own) goto free_orig_node;

- size = num_ifs * sizeof(uint8_t); + size = bat_priv->num_ifaces * sizeof(uint8_t); orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC); if (!orig_node->bcast_own_sum) goto free_bcast_own; @@ -182,16 +184,25 @@ static bool purge_orig_neighbors(struct orig_node *orig_node,

*best_neigh_node = NULL;

- /* for all neighbors towards this originator ... */ list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) { neigh_node = list_entry(list_pos, struct neigh_node, list);

- if (time_after(jiffies, + if ((time_after(jiffies, (neigh_node->last_valid + - ((PURGE_TIMEOUT * HZ) / 1000)))) { - - bat_dbg(DBG_BATMAN, "neighbor timeout: originator %pM, neighbor: %pM, last_valid %lu\n", orig_node->orig, neigh_node->addr, (neigh_node->last_valid / HZ)); + ((PURGE_TIMEOUT * HZ) / 1000)))) || + (neigh_node->if_incoming->if_status == + IF_TO_BE_REMOVED)) { + + if (neigh_node->if_incoming->if_status == + IF_TO_BE_REMOVED) + bat_dbg(DBG_BATMAN, "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", + orig_node->orig, neigh_node->addr, + neigh_node->if_incoming->dev); + else + bat_dbg(DBG_BATMAN, "neighbor timeout: originator %pM, neighbor: %pM, last_valid: %lu\n", + orig_node->orig, neigh_node->addr, + (neigh_node->last_valid / HZ));

neigh_purged = true; list_del(list_pos); @@ -246,13 +257,17 @@ void purge_orig(struct work_struct *work)

spin_unlock_irqrestore(&orig_hash_lock, flags);

- start_purge_timer(); + /* if work == NULL we were not called by the timer + * and thus do not need to re-arm the timer */ + if (work) + start_purge_timer(); }

ssize_t orig_fill_buffer_text(struct net_device *net_dev, char *buff, size_t count, loff_t off) { HASHIT(hashit); + struct bat_priv *bat_priv = netdev_priv(net_dev); struct orig_node *orig_node; struct neigh_node *neigh_node; size_t hdr_len, tmp_len; @@ -260,10 +275,7 @@ ssize_t orig_fill_buffer_text(struct net_device *net_dev, char *buff, unsigned long flags; char orig_str[ETH_STR_LEN], router_str[ETH_STR_LEN];

- rcu_read_lock(); - if (list_empty(&if_list)) { - rcu_read_unlock(); - + if (!bat_priv->primary_if) { if (off == 0) return sprintf(buff, "BATMAN mesh %s disabled - please specify interfaces to enable it\n", @@ -272,9 +284,7 @@ ssize_t orig_fill_buffer_text(struct net_device *net_dev, char *buff, return 0; }

- if (((struct batman_if *)if_list.next)->if_active != IF_ACTIVE) { - rcu_read_unlock(); - + if (bat_priv->primary_if->if_status != IF_ACTIVE) { if (off == 0) return sprintf(buff, "BATMAN mesh %s disabled - primary interface not active\n", @@ -283,12 +293,12 @@ ssize_t orig_fill_buffer_text(struct net_device *net_dev, char *buff, return 0; }

+ rcu_read_lock(); hdr_len = sprintf(buff, " %-14s (%s/%i) %17s [%10s]: %20s ... [B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s (%s)] \n", "Originator", "#", TQ_MAX_VALUE, "Nexthop", "outgoingIF", "Potential nexthops", SOURCE_VERSION, REVISION_VERSION_STR, - ((struct batman_if *)if_list.next)->dev, - ((struct batman_if *)if_list.next)->addr_str, + bat_priv->primary_if->dev, bat_priv->primary_if->addr_str, net_dev->name); rcu_read_unlock();

@@ -347,3 +357,152 @@ ssize_t orig_fill_buffer_text(struct net_device *net_dev, char *buff, return bytes_written; }

+static int orig_node_add_if(struct orig_node *orig_node, int max_if_num) +{ + void *data_ptr; + + data_ptr = kmalloc(max_if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS, + GFP_ATOMIC); + if (!data_ptr) { + printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n"); + return -1; + } + + memcpy(data_ptr, orig_node->bcast_own, + (max_if_num - 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS); + kfree(orig_node->bcast_own); + orig_node->bcast_own = data_ptr; + + data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); + if (!data_ptr) { + printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n"); + return -1; + } + + memcpy(data_ptr, orig_node->bcast_own_sum, + (max_if_num - 1) * sizeof(uint8_t)); + kfree(orig_node->bcast_own_sum); + orig_node->bcast_own_sum = data_ptr; + + return 0; +} + +int orig_hash_add_if(struct batman_if *batman_if, int max_if_num) +{ + struct orig_node *orig_node; + HASHIT(hashit); + + /* resize all orig nodes because orig_node->bcast_own(_sum) depend on + * if_num */ + spin_lock(&orig_hash_lock); + + while (hash_iterate(orig_hash, &hashit)) { + orig_node = hashit.bucket->data; + + if (orig_node_add_if(orig_node, max_if_num) == -1) + goto err; + } + + spin_unlock(&orig_hash_lock); + return 0; + +err: + spin_unlock(&orig_hash_lock); + return -ENOMEM; +} + +static int orig_node_del_if(struct orig_node *orig_node, + int max_if_num, int del_if_num) +{ + void *data_ptr = NULL; + int chunk_size; + + /* last interface was removed */ + if (max_if_num == 0) + goto free_bcast_own; + + chunk_size = sizeof(TYPE_OF_WORD) * NUM_WORDS; + data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC); + if (!data_ptr) { + printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n"); + return -1; + } + + /* copy first part */ + memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size); + + /* copy second part */ + memcpy(data_ptr, + orig_node->bcast_own + ((del_if_num + 1) * chunk_size), + (max_if_num - del_if_num) * chunk_size); + +free_bcast_own: + kfree(orig_node->bcast_own); + orig_node->bcast_own = data_ptr; + + if (max_if_num == 0) + goto free_own_sum; + + data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); + if (!data_ptr) { + printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n"); + return -1; + } + + memcpy(data_ptr, orig_node->bcast_own_sum, + del_if_num * sizeof(uint8_t)); + + memcpy(data_ptr, + orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)), + (max_if_num - del_if_num) * sizeof(uint8_t)); + +free_own_sum: + kfree(orig_node->bcast_own_sum); + orig_node->bcast_own_sum = data_ptr; + + return 0; +} + +int orig_hash_del_if(struct batman_if *batman_if, int max_if_num) +{ + struct batman_if *batman_if_tmp; + struct orig_node *orig_node; + HASHIT(hashit); + int ret; + + /* resize all orig nodes because orig_node->bcast_own(_sum) depend on + * if_num */ + spin_lock(&orig_hash_lock); + + while (hash_iterate(orig_hash, &hashit)) { + orig_node = hashit.bucket->data; + + ret = orig_node_del_if(orig_node, max_if_num, + batman_if->if_num); + + if (ret == -1) + goto err; + } + + /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ + rcu_read_lock(); + list_for_each_entry_rcu(batman_if_tmp, &if_list, list) { + if (batman_if_tmp->if_status == IF_NOT_IN_USE) + continue; + + if (batman_if == batman_if_tmp) + continue; + + if (batman_if_tmp->if_num > batman_if->if_num) + batman_if_tmp->if_num--; + } + rcu_read_unlock(); + + batman_if->if_num = -1; + spin_unlock(&orig_hash_lock); + return 0; + +err: + spin_unlock(&orig_hash_lock); + return -ENOMEM; +} diff --git a/drivers/staging/batman-adv/originator.h b/drivers/staging/batman-adv/originator.h index 745b4b0..afbc7c0 100644 --- a/drivers/staging/batman-adv/originator.h +++ b/drivers/staging/batman-adv/originator.h @@ -30,3 +30,5 @@ create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node, uint8_t *neigh, struct batman_if *if_incoming); ssize_t orig_fill_buffer_text(struct net_device *net_dev, char *buff, size_t count, loff_t off); +int orig_hash_add_if(struct batman_if *batman_if, int max_if_num); +int orig_hash_del_if(struct batman_if *batman_if, int max_if_num); diff --git a/drivers/staging/batman-adv/proc.c b/drivers/staging/batman-adv/proc.c deleted file mode 100644 index 25b24fe..0000000 --- a/drivers/staging/batman-adv/proc.c +++ /dev/null @@ -1,170 +0,0 @@ -/* - * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA - * - */ - -#include "main.h" -#include "proc.h" -#include "routing.h" -#include "translation-table.h" -#include "hard-interface.h" -#include "types.h" -#include "hash.h" -#include "vis.h" - -static struct proc_dir_entry *proc_batman_dir, *proc_interface_file; - -static int proc_interfaces_read(struct seq_file *seq, void *offset) -{ - struct batman_if *batman_if; - - rcu_read_lock(); - list_for_each_entry_rcu(batman_if, &if_list, list) { - seq_printf(seq, "[%8s] %s %s\n", - (batman_if->if_active == IF_ACTIVE ? - "active" : "inactive"), - batman_if->dev, - (batman_if->if_active == IF_ACTIVE ? - batman_if->addr_str : " ")); - } - rcu_read_unlock(); - - return 0; -} - -static int proc_interfaces_open(struct inode *inode, struct file *file) -{ - return single_open(file, proc_interfaces_read, NULL); -} - -static ssize_t proc_interfaces_write(struct file *instance, - const char __user *userbuffer, - size_t count, loff_t *data) -{ - char *if_string, *colon_ptr = NULL, *cr_ptr = NULL; - int not_copied = 0, if_num = 0, add_success; - struct batman_if *batman_if = NULL; - - if_string = kmalloc(count, GFP_KERNEL); - - if (!if_string) - return -ENOMEM; - - if (count > IFNAMSIZ - 1) { - printk(KERN_WARNING "batman-adv:Can't add interface: device name is too long\n"); - goto end; - } - - not_copied = copy_from_user(if_string, userbuffer, count); - if_string[count - not_copied - 1] = 0; - - colon_ptr = strchr(if_string, ':'); - if (colon_ptr) - *colon_ptr = 0; - - if (!colon_ptr) { - cr_ptr = strchr(if_string, '\n'); - if (cr_ptr) - *cr_ptr = 0; - } - - if (strlen(if_string) == 0) { - shutdown_module(); - num_ifs = 0; - goto end; - } - - /* add interface */ - rcu_read_lock(); - list_for_each_entry_rcu(batman_if, &if_list, list) { - if (strncmp(batman_if->dev, if_string, count) == 0) { - printk(KERN_ERR "batman-adv:Given interface is already active: %s\n", if_string); - rcu_read_unlock(); - goto end; - - } - - if_num++; - } - rcu_read_unlock(); - - add_success = hardif_add_interface(if_string, if_num); - if (add_success < 0) - goto end; - - num_ifs = if_num + 1; - - if ((atomic_read(&module_state) == MODULE_INACTIVE) && - (hardif_get_active_if_num() > 0)) - activate_module(); - - return count; -end: - kfree(if_string); - return count; -} - -static const struct file_operations proc_interfaces_fops = { - .owner = THIS_MODULE, - .open = proc_interfaces_open, - .read = seq_read, - .write = proc_interfaces_write, - .llseek = seq_lseek, - .release = single_release, -}; - -void cleanup_procfs(void) -{ - if (proc_interface_file) - remove_proc_entry(PROC_FILE_INTERFACES, proc_batman_dir); - - if (proc_batman_dir) -#ifdef __NET_NET_NAMESPACE_H - remove_proc_entry(PROC_ROOT_DIR, init_net.proc_net); -#else - remove_proc_entry(PROC_ROOT_DIR, proc_net); -#endif -} - -int setup_procfs(void) -{ -#ifdef __NET_NET_NAMESPACE_H - proc_batman_dir = proc_mkdir(PROC_ROOT_DIR, init_net.proc_net); -#else - proc_batman_dir = proc_mkdir(PROC_ROOT_DIR, proc_net); -#endif - - if (!proc_batman_dir) { - printk(KERN_ERR "batman-adv: Registering the '/proc/net/%s' folder failed\n", PROC_ROOT_DIR); - return -EFAULT; - } - - proc_interface_file = create_proc_entry(PROC_FILE_INTERFACES, - S_IWUSR | S_IRUGO, - proc_batman_dir); - if (proc_interface_file) { - proc_interface_file->proc_fops = &proc_interfaces_fops; - } else { - printk(KERN_ERR "batman-adv: Registering the '/proc/net/%s/%s' file failed\n", PROC_ROOT_DIR, PROC_FILE_INTERFACES); - cleanup_procfs(); - return -EFAULT; - } - - return 0; -} diff --git a/drivers/staging/batman-adv/proc.h b/drivers/staging/batman-adv/proc.h deleted file mode 100644 index 6f4f5b3..0000000 --- a/drivers/staging/batman-adv/proc.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA - * - */ - -#include <linux/proc_fs.h> -#include <linux/seq_file.h> - -#define PROC_ROOT_DIR "batman-adv" -#define PROC_FILE_INTERFACES "interfaces" - -void cleanup_procfs(void); -int setup_procfs(void); - diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c index 0a9f52b..7b8aa27 100644 --- a/drivers/staging/batman-adv/routing.c +++ b/drivers/staging/batman-adv/routing.c @@ -205,7 +205,7 @@ static int isBidirectionalNeigh(struct orig_node *orig_node, batman_packet->tq = ((batman_packet->tq * orig_neigh_node->tq_own * orig_neigh_node->tq_asym_penalty) / - (TQ_MAX_VALUE * TQ_MAX_VALUE)); + (TQ_MAX_VALUE * TQ_MAX_VALUE));

bat_dbg(DBG_BATMAN, "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n", orig_node->orig, orig_neigh_node->orig, total_count, @@ -387,7 +387,7 @@ void receive_bat_packet(struct ethhdr *ethhdr, batman_packet->version, has_directlink_flag);

list_for_each_entry_rcu(batman_if, &if_list, list) { - if (batman_if->if_active != IF_ACTIVE) + if (batman_if->if_status != IF_ACTIVE) continue;

if (compare_orig(ethhdr->h_source, @@ -893,7 +893,7 @@ int recv_bcast_packet(struct sk_buff *skb) if (is_my_mac(ethhdr->h_source)) return NET_RX_DROP;

- bcast_packet = (struct bcast_packet *) skb->data; + bcast_packet = (struct bcast_packet *)skb->data;

/* ignore broadcasts originated by myself */ if (is_my_mac(bcast_packet->orig)) diff --git a/drivers/staging/batman-adv/send.c b/drivers/staging/batman-adv/send.c index de2344a..31d86ae 100644 --- a/drivers/staging/batman-adv/send.c +++ b/drivers/staging/batman-adv/send.c @@ -57,7 +57,7 @@ int send_skb_packet(struct sk_buff *skb, { struct ethhdr *ethhdr;

- if (batman_if->if_active != IF_ACTIVE) + if (batman_if->if_status != IF_ACTIVE) goto send_skb_err;

if (unlikely(!batman_if->net_dev)) @@ -123,7 +123,7 @@ static void send_packet_to_if(struct forw_packet *forw_packet, int16_t buff_pos; struct batman_packet *batman_packet;

- if (batman_if->if_active != IF_ACTIVE) + if (batman_if->if_status != IF_ACTIVE) return;

packet_num = 0; @@ -182,7 +182,7 @@ static void send_packet(struct forw_packet *forw_packet) return; }

- if (forw_packet->if_incoming->if_active != IF_ACTIVE) + if (forw_packet->if_incoming->if_status != IF_ACTIVE) return;

/* multihomed peer assumed */ @@ -243,7 +243,13 @@ void schedule_own_packet(struct batman_if *batman_if) struct bat_priv *bat_priv = netdev_priv(soft_device); unsigned long send_time; struct batman_packet *batman_packet; - int vis_server = atomic_read(&bat_priv->vis_mode); + int vis_server; + + if ((batman_if->if_status == IF_NOT_IN_USE) || + (batman_if->if_status == IF_TO_BE_REMOVED)) + return; + + vis_server = atomic_read(&bat_priv->vis_mode);

/** * the interface gets activated here to avoid race conditions between @@ -252,11 +258,12 @@ void schedule_own_packet(struct batman_if *batman_if) * outdated packets (especially uninitialized mac addresses) in the * packet queue */ - if (batman_if->if_active == IF_TO_BE_ACTIVATED) - batman_if->if_active = IF_ACTIVE; + if (batman_if->if_status == IF_TO_BE_ACTIVATED) + batman_if->if_status = IF_ACTIVE;

/* if local hna has changed and interface is a primary interface */ - if ((atomic_read(&hna_local_changed)) && (batman_if->if_num == 0)) + if ((atomic_read(&hna_local_changed)) && + (batman_if == bat_priv->primary_if)) rebuild_batman_packet(batman_if);

/** @@ -374,13 +381,11 @@ void add_bcast_packet_to_list(struct sk_buff *skb)

forw_packet = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC); if (!forw_packet) - return; + goto out;

skb = skb_copy(skb, GFP_ATOMIC); - if (!skb) { - kfree(forw_packet); - return; - } + if (!skb) + goto packet_free;

skb_reset_mac_header(skb);

@@ -391,6 +396,12 @@ void add_bcast_packet_to_list(struct sk_buff *skb) forw_packet->num_packets = 0;

_add_bcast_packet_to_list(forw_packet, 1); + return; + +packet_free: + kfree(forw_packet); +out: + return; }

void send_outstanding_bcast_packet(struct work_struct *work) @@ -455,19 +466,31 @@ void send_outstanding_bat_packet(struct work_struct *work) forw_packet_free(forw_packet); }

-void purge_outstanding_packets(void) +void purge_outstanding_packets(struct batman_if *batman_if) { struct forw_packet *forw_packet; struct hlist_node *tmp_node, *safe_tmp_node; unsigned long flags;

- bat_dbg(DBG_BATMAN, "purge_outstanding_packets()\n"); + if (batman_if) + bat_dbg(DBG_BATMAN, "purge_outstanding_packets(): %s\n", + batman_if->dev); + else + bat_dbg(DBG_BATMAN, "purge_outstanding_packets()\n");

/* free bcast list */ spin_lock_irqsave(&forw_bcast_list_lock, flags); hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node, &forw_bcast_list, list) {

+ /** + * if purge_outstanding_packets() was called with an argmument + * we delete only packets belonging to the given interface + */ + if ((batman_if) && + (forw_packet->if_incoming != batman_if)) + continue; + spin_unlock_irqrestore(&forw_bcast_list_lock, flags);

/** @@ -484,6 +507,14 @@ void purge_outstanding_packets(void) hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node, &forw_bat_list, list) {

+ /** + * if purge_outstanding_packets() was called with an argmument + * we delete only packets belonging to the given interface + */ + if ((batman_if) && + (forw_packet->if_incoming != batman_if)) + continue; + spin_unlock_irqrestore(&forw_bat_list_lock, flags);

/** diff --git a/drivers/staging/batman-adv/send.h b/drivers/staging/batman-adv/send.h index b2ddf63..b84a470 100644 --- a/drivers/staging/batman-adv/send.h +++ b/drivers/staging/batman-adv/send.h @@ -36,4 +36,4 @@ void schedule_forward_packet(struct orig_node *orig_node, void add_bcast_packet_to_list(struct sk_buff *skb); void send_outstanding_bcast_packet(struct work_struct *work); void send_outstanding_bat_packet(struct work_struct *work); -void purge_outstanding_packets(void); +void purge_outstanding_packets(struct batman_if *batman_if); diff --git a/drivers/staging/batman-adv/soft-interface.c b/drivers/staging/batman-adv/soft-interface.c index 4cdebe5..681a0ad 100644 --- a/drivers/staging/batman-adv/soft-interface.c +++ b/drivers/staging/batman-adv/soft-interface.c @@ -251,7 +251,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *dev) memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);

/* net_dev won't be available when not active */ - if (orig_node->router->if_incoming->if_active != IF_ACTIVE) + if (orig_node->router->if_incoming->if_status != IF_ACTIVE) goto unlock;

/* don't lock while sending the packets ... we therefore diff --git a/drivers/staging/batman-adv/translation-table.c b/drivers/staging/batman-adv/translation-table.c index b735200..c7a6635 100644 --- a/drivers/staging/batman-adv/translation-table.c +++ b/drivers/staging/batman-adv/translation-table.c @@ -159,16 +159,14 @@ int hna_local_fill_buffer(unsigned char *buff, int buff_len) int hna_local_fill_buffer_text(struct net_device *net_dev, char *buff, size_t count, loff_t off) { + struct bat_priv *bat_priv = netdev_priv(net_dev); struct hna_local_entry *hna_local_entry; HASHIT(hashit); int bytes_written = 0; unsigned long flags; size_t hdr_len;

- rcu_read_lock(); - if (list_empty(&if_list)) { - rcu_read_unlock(); - + if (!bat_priv->primary_if) { if (off == 0) return sprintf(buff, "BATMAN mesh %s disabled - please specify interfaces to enable it\n", @@ -176,7 +174,6 @@ int hna_local_fill_buffer_text(struct net_device *net_dev, char *buff,

return 0; } - rcu_read_unlock();

hdr_len = sprintf(buff, "Locally retrieved addresses (from %s) announced via HNA:\n", @@ -376,16 +373,14 @@ void hna_global_add_orig(struct orig_node *orig_node, int hna_global_fill_buffer_text(struct net_device *net_dev, char *buff, size_t count, loff_t off) { + struct bat_priv *bat_priv = netdev_priv(net_dev); struct hna_global_entry *hna_global_entry; HASHIT(hashit); int bytes_written = 0; unsigned long flags; size_t hdr_len;

- rcu_read_lock(); - if (list_empty(&if_list)) { - rcu_read_unlock(); - + if (!bat_priv->primary_if) { if (off == 0) return sprintf(buff, "BATMAN mesh %s disabled - please specify interfaces to enable it\n", @@ -393,7 +388,6 @@ int hna_global_fill_buffer_text(struct net_device *net_dev, char *buff,

return 0; } - rcu_read_unlock();

hdr_len = sprintf(buff, "Globally announced HNAs received via the mesh %s (translation table):\n", diff --git a/drivers/staging/batman-adv/types.h b/drivers/staging/batman-adv/types.h index ffaa16c..eba1fa6 100644 --- a/drivers/staging/batman-adv/types.h +++ b/drivers/staging/batman-adv/types.h @@ -36,12 +36,13 @@ struct batman_if { struct list_head list; int16_t if_num; char *dev; - char if_active; + char if_status; char addr_str[ETH_STR_LEN]; struct net_device *net_dev; atomic_t seqno; unsigned char *packet_buff; int packet_len; + struct kobject *hardif_obj; struct rcu_head rcu;

}; @@ -84,6 +85,8 @@ struct bat_priv { atomic_t aggregation_enabled; atomic_t vis_mode; atomic_t orig_interval; + char num_ifaces; + struct batman_if *primary_if; struct kobject *mesh_obj; };

diff --git a/drivers/staging/batman-adv/vis.c b/drivers/staging/batman-adv/vis.c index 57d69d7..b6ff031 100644 --- a/drivers/staging/batman-adv/vis.c +++ b/drivers/staging/batman-adv/vis.c @@ -173,13 +173,10 @@ ssize_t vis_fill_buffer_text(struct net_device *net_dev, char *buff, unsigned long flags; int vis_server = atomic_read(&bat_priv->vis_mode);

- rcu_read_lock(); - if (list_empty(&if_list) || (vis_server == VIS_TYPE_CLIENT_UPDATE)) { - rcu_read_unlock(); + if ((!bat_priv->primary_if) || + (vis_server == VIS_TYPE_CLIENT_UPDATE)) return 0; - }

- rcu_read_unlock(); hdr_len = 0;

spin_lock_irqsave(&vis_hash_lock, flags); @@ -498,7 +495,7 @@ static int generate_vis_packet(struct bat_priv *bat_priv) if (orig_node->router != NULL && compare_orig(orig_node->router->addr, orig_node->orig) - && (orig_node->router->if_incoming->if_active == + && (orig_node->router->if_incoming->if_status == IF_ACTIVE) && orig_node->router->tq_avg > 0) {