diff options
Diffstat (limited to 'net/batman-adv/sysfs.c')
| -rw-r--r-- | net/batman-adv/sysfs.c | 935 |
1 files changed, 935 insertions, 0 deletions
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c new file mode 100644 index 000000000..a75dc12f9 --- /dev/null +++ b/net/batman-adv/sysfs.c @@ -0,0 +1,935 @@ +/* Copyright (C) 2010-2014 B.A.T.M.A.N. contributors: + * + * Marek Lindner + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include "main.h" +#include "sysfs.h" +#include "translation-table.h" +#include "distributed-arp-table.h" +#include "network-coding.h" +#include "originator.h" +#include "hard-interface.h" +#include "soft-interface.h" +#include "gateway_common.h" +#include "gateway_client.h" + +static struct net_device *batadv_kobj_to_netdev(struct kobject *obj) +{ + struct device *dev = container_of(obj->parent, struct device, kobj); + + return to_net_dev(dev); +} + +static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(obj); + + return netdev_priv(net_dev); +} + +/** + * batadv_vlan_kobj_to_batpriv - convert a vlan kobj in the associated batpriv + * @obj: kobject to covert + * + * Returns the associated batadv_priv struct. + */ +static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj) +{ + /* VLAN specific attributes are located in the root sysfs folder if they + * refer to the untagged VLAN.. + */ + if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name)) + return batadv_kobj_to_batpriv(obj); + + /* ..while the attributes for the tagged vlans are located in + * the in the corresponding "vlan%VID" subfolder + */ + return batadv_kobj_to_batpriv(obj->parent); +} + +/** + * batadv_kobj_to_vlan - convert a kobj in the associated softif_vlan struct + * @obj: kobject to covert + * + * Returns the associated softif_vlan struct if found, NULL otherwise. + */ +static struct batadv_softif_vlan * +batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj) +{ + struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { + if (vlan_tmp->kobj != obj) + continue; + + if (!atomic_inc_not_zero(&vlan_tmp->refcount)) + continue; + + vlan = vlan_tmp; + break; + } + rcu_read_unlock(); + + return vlan; +} + +#define BATADV_UEV_TYPE_VAR "BATTYPE=" +#define BATADV_UEV_ACTION_VAR "BATACTION=" +#define BATADV_UEV_DATA_VAR "BATDATA=" + +static char *batadv_uev_action_str[] = { + "add", + "del", + "change" +}; + +static char *batadv_uev_type_str[] = { + "gw" +}; + +/* Use this, if you have customized show and store functions for vlan attrs */ +#define BATADV_ATTR_VLAN(_name, _mode, _show, _store) \ +struct batadv_attribute batadv_attr_vlan_##_name = { \ + .attr = {.name = __stringify(_name), \ + .mode = _mode }, \ + .show = _show, \ + .store = _store, \ +} + +/* Use this, if you have customized show and store functions */ +#define BATADV_ATTR(_name, _mode, _show, _store) \ +struct batadv_attribute batadv_attr_##_name = { \ + .attr = {.name = __stringify(_name), \ + .mode = _mode }, \ + .show = _show, \ + .store = _store, \ +} + +#define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \ +ssize_t batadv_store_##_name(struct kobject *kobj, \ + struct attribute *attr, char *buff, \ + size_t count) \ +{ \ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \ + struct batadv_priv *bat_priv = netdev_priv(net_dev); \ + \ + return __batadv_store_bool_attr(buff, count, _post_func, attr, \ + &bat_priv->_name, net_dev); \ +} + +#define BATADV_ATTR_SIF_SHOW_BOOL(_name) \ +ssize_t batadv_show_##_name(struct kobject *kobj, \ + struct attribute *attr, char *buff) \ +{ \ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \ + \ + return sprintf(buff, "%s\n", \ + atomic_read(&bat_priv->_name) == 0 ? \ + "disabled" : "enabled"); \ +} \ + +/* Use this, if you are going to turn a [name] in the soft-interface + * (bat_priv) on or off + */ +#define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func) \ + static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \ + static BATADV_ATTR_SIF_SHOW_BOOL(_name) \ + static BATADV_ATTR(_name, _mode, batadv_show_##_name, \ + batadv_store_##_name) + +#define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func) \ +ssize_t batadv_store_##_name(struct kobject *kobj, \ + struct attribute *attr, char *buff, \ + size_t count) \ +{ \ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \ + struct batadv_priv *bat_priv = netdev_priv(net_dev); \ + \ + return __batadv_store_uint_attr(buff, count, _min, _max, \ + _post_func, attr, \ + &bat_priv->_name, net_dev); \ +} + +#define BATADV_ATTR_SIF_SHOW_UINT(_name) \ +ssize_t batadv_show_##_name(struct kobject *kobj, \ + struct attribute *attr, char *buff) \ +{ \ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \ + \ + return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name)); \ +} \ + +/* Use this, if you are going to set [name] in the soft-interface + * (bat_priv) to an unsigned integer value + */ +#define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func) \ + static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\ + static BATADV_ATTR_SIF_SHOW_UINT(_name) \ + static BATADV_ATTR(_name, _mode, batadv_show_##_name, \ + batadv_store_##_name) + +#define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \ +ssize_t batadv_store_vlan_##_name(struct kobject *kobj, \ + struct attribute *attr, char *buff, \ + size_t count) \ +{ \ + struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\ + struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \ + kobj); \ + size_t res = __batadv_store_bool_attr(buff, count, _post_func, \ + attr, &vlan->_name, \ + bat_priv->soft_iface); \ + \ + batadv_softif_vlan_free_ref(vlan); \ + return res; \ +} + +#define BATADV_ATTR_VLAN_SHOW_BOOL(_name) \ +ssize_t batadv_show_vlan_##_name(struct kobject *kobj, \ + struct attribute *attr, char *buff) \ +{ \ + struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\ + struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \ + kobj); \ + size_t res = sprintf(buff, "%s\n", \ + atomic_read(&vlan->_name) == 0 ? \ + "disabled" : "enabled"); \ + \ + batadv_softif_vlan_free_ref(vlan); \ + return res; \ +} + +/* Use this, if you are going to turn a [name] in the vlan struct on or off */ +#define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func) \ + static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \ + static BATADV_ATTR_VLAN_SHOW_BOOL(_name) \ + static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \ + batadv_store_vlan_##_name) + +static int batadv_store_bool_attr(char *buff, size_t count, + struct net_device *net_dev, + const char *attr_name, atomic_t *attr) +{ + int enabled = -1; + + if (buff[count - 1] == '\n') + buff[count - 1] = '\0'; + + if ((strncmp(buff, "1", 2) == 0) || + (strncmp(buff, "enable", 7) == 0) || + (strncmp(buff, "enabled", 8) == 0)) + enabled = 1; + + if ((strncmp(buff, "0", 2) == 0) || + (strncmp(buff, "disable", 8) == 0) || + (strncmp(buff, "disabled", 9) == 0)) + enabled = 0; + + if (enabled < 0) { + batadv_info(net_dev, "%s: Invalid parameter received: %s\n", + attr_name, buff); + return -EINVAL; + } + + if (atomic_read(attr) == enabled) + return count; + + batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name, + atomic_read(attr) == 1 ? "enabled" : "disabled", + enabled == 1 ? "enabled" : "disabled"); + + atomic_set(attr, (unsigned int)enabled); + return count; +} + +static inline ssize_t +__batadv_store_bool_attr(char *buff, size_t count, + void (*post_func)(struct net_device *), + struct attribute *attr, + atomic_t *attr_store, struct net_device *net_dev) +{ + int ret; + + ret = batadv_store_bool_attr(buff, count, net_dev, attr->name, + attr_store); + if (post_func && ret) + post_func(net_dev); + + return ret; +} + +static int batadv_store_uint_attr(const char *buff, size_t count, + struct net_device *net_dev, + const char *attr_name, + unsigned int min, unsigned int max, + atomic_t *attr) +{ + unsigned long uint_val; + int ret; + + ret = kstrtoul(buff, 10, &uint_val); + if (ret) { + batadv_info(net_dev, "%s: Invalid parameter received: %s\n", + attr_name, buff); + return -EINVAL; + } + + if (uint_val < min) { + batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n", + attr_name, uint_val, min); + return -EINVAL; + } + + if (uint_val > max) { + batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n", + attr_name, uint_val, max); + return -EINVAL; + } + + if (atomic_read(attr) == uint_val) + return count; + + batadv_info(net_dev, "%s: Changing from: %i to: %lu\n", + attr_name, atomic_read(attr), uint_val); + + atomic_set(attr, uint_val); + return count; +} + +static inline ssize_t +__batadv_store_uint_attr(const char *buff, size_t count, + int min, int max, + void (*post_func)(struct net_device *), + const struct attribute *attr, + atomic_t *attr_store, struct net_device *net_dev) +{ + int ret; + + ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max, + attr_store); + if (post_func && ret) + post_func(net_dev); + + return ret; +} + +static ssize_t batadv_show_bat_algo(struct kobject *kobj, + struct attribute *attr, char *buff) +{ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + + return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name); +} + +static void batadv_post_gw_reselect(struct net_device *net_dev) +{ + struct batadv_priv *bat_priv = netdev_priv(net_dev); + + batadv_gw_reselect(bat_priv); +} + +static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr, + char *buff) +{ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + int bytes_written; + + switch (atomic_read(&bat_priv->gw_mode)) { + case BATADV_GW_MODE_CLIENT: + bytes_written = sprintf(buff, "%s\n", + BATADV_GW_MODE_CLIENT_NAME); + break; + case BATADV_GW_MODE_SERVER: + bytes_written = sprintf(buff, "%s\n", + BATADV_GW_MODE_SERVER_NAME); + break; + default: + bytes_written = sprintf(buff, "%s\n", + BATADV_GW_MODE_OFF_NAME); + break; + } + + return bytes_written; +} + +static ssize_t batadv_store_gw_mode(struct kobject *kobj, + struct attribute *attr, char *buff, + size_t count) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); + struct batadv_priv *bat_priv = netdev_priv(net_dev); + char *curr_gw_mode_str; + int gw_mode_tmp = -1; + + if (buff[count - 1] == '\n') + buff[count - 1] = '\0'; + + if (strncmp(buff, BATADV_GW_MODE_OFF_NAME, + strlen(BATADV_GW_MODE_OFF_NAME)) == 0) + gw_mode_tmp = BATADV_GW_MODE_OFF; + + if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME, + strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0) + gw_mode_tmp = BATADV_GW_MODE_CLIENT; + + if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME, + strlen(BATADV_GW_MODE_SERVER_NAME)) == 0) + gw_mode_tmp = BATADV_GW_MODE_SERVER; + + if (gw_mode_tmp < 0) { + batadv_info(net_dev, + "Invalid parameter for 'gw mode' setting received: %s\n", + buff); + return -EINVAL; + } + + if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp) + return count; + + switch (atomic_read(&bat_priv->gw_mode)) { + case BATADV_GW_MODE_CLIENT: + curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME; + break; + case BATADV_GW_MODE_SERVER: + curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME; + break; + default: + curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME; + break; + } + + batadv_info(net_dev, "Changing gw mode from: %s to: %s\n", + curr_gw_mode_str, buff); + + /* Invoking batadv_gw_reselect() is not enough to really de-select the + * current GW. It will only instruct the gateway client code to perform + * a re-election the next time that this is needed. + * + * When gw client mode is being switched off the current GW must be + * de-selected explicitly otherwise no GW_ADD uevent is thrown on + * client mode re-activation. This is operation is performed in + * batadv_gw_check_client_stop(). + */ + batadv_gw_reselect(bat_priv); + /* always call batadv_gw_check_client_stop() before changing the gateway + * state + */ + batadv_gw_check_client_stop(bat_priv); + atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp); + batadv_gw_tvlv_container_update(bat_priv); + return count; +} + +static ssize_t batadv_show_gw_bwidth(struct kobject *kobj, + struct attribute *attr, char *buff) +{ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + uint32_t down, up; + + down = atomic_read(&bat_priv->gw.bandwidth_down); + up = atomic_read(&bat_priv->gw.bandwidth_up); + + return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10, + down % 10, up / 10, up % 10); +} + +static ssize_t batadv_store_gw_bwidth(struct kobject *kobj, + struct attribute *attr, char *buff, + size_t count) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); + + if (buff[count - 1] == '\n') + buff[count - 1] = '\0'; + + return batadv_gw_bandwidth_set(net_dev, buff, count); +} + +/** + * batadv_show_isolation_mark - print the current isolation mark/mask + * @kobj: kobject representing the private mesh sysfs directory + * @attr: the batman-adv attribute the user is interacting with + * @buff: the buffer that will contain the data to send back to the user + * + * Returns the number of bytes written into 'buff' on success or a negative + * error code in case of failure + */ +static ssize_t batadv_show_isolation_mark(struct kobject *kobj, + struct attribute *attr, char *buff) +{ + struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + + return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark, + bat_priv->isolation_mark_mask); +} + +/** + * batadv_store_isolation_mark - parse and store the isolation mark/mask entered + * by the user + * @kobj: kobject representing the private mesh sysfs directory + * @attr: the batman-adv attribute the user is interacting with + * @buff: the buffer containing the user data + * @count: number of bytes in the buffer + * + * Returns 'count' on success or a negative error code in case of failure + */ +static ssize_t batadv_store_isolation_mark(struct kobject *kobj, + struct attribute *attr, char *buff, + size_t count) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); + struct batadv_priv *bat_priv = netdev_priv(net_dev); + uint32_t mark, mask; + char *mask_ptr; + + /* parse the mask if it has been specified, otherwise assume the mask is + * the biggest possible + */ + mask = 0xFFFFFFFF; + mask_ptr = strchr(buff, '/'); + if (mask_ptr) { + *mask_ptr = '\0'; + mask_ptr++; + + /* the mask must be entered in hex base as it is going to be a + * bitmask and not a prefix length + */ + if (kstrtou32(mask_ptr, 16, &mask) < 0) + return -EINVAL; + } + + /* the mark can be entered in any base */ + if (kstrtou32(buff, 0, &mark) < 0) + return -EINVAL; + + bat_priv->isolation_mark_mask = mask; + /* erase bits not covered by the mask */ + bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask; + + batadv_info(net_dev, + "New skb mark for extended isolation: %#.8x/%#.8x\n", + bat_priv->isolation_mark, bat_priv->isolation_mark_mask); + + return count; +} + +BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL); +BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL); +#ifdef CONFIG_BATMAN_ADV_BLA +BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL); +#endif +#ifdef CONFIG_BATMAN_ADV_DAT +BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR, + batadv_dat_status_update); +#endif +BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu); +static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL); +static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode, + batadv_store_gw_mode); +BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER, + INT_MAX, NULL); +BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE, + NULL); +BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE, + batadv_post_gw_reselect); +static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth, + batadv_store_gw_bwidth); +#ifdef CONFIG_BATMAN_ADV_MCAST +BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL); +#endif +#ifdef CONFIG_BATMAN_ADV_DEBUG +BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL); +#endif +#ifdef CONFIG_BATMAN_ADV_NC +BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR, + batadv_nc_status_update); +#endif +static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR, + batadv_show_isolation_mark, batadv_store_isolation_mark); + +static struct batadv_attribute *batadv_mesh_attrs[] = { + &batadv_attr_aggregated_ogms, + &batadv_attr_bonding, +#ifdef CONFIG_BATMAN_ADV_BLA + &batadv_attr_bridge_loop_avoidance, +#endif +#ifdef CONFIG_BATMAN_ADV_DAT + &batadv_attr_distributed_arp_table, +#endif +#ifdef CONFIG_BATMAN_ADV_MCAST + &batadv_attr_multicast_mode, +#endif + &batadv_attr_fragmentation, + &batadv_attr_routing_algo, + &batadv_attr_gw_mode, + &batadv_attr_orig_interval, + &batadv_attr_hop_penalty, + &batadv_attr_gw_sel_class, + &batadv_attr_gw_bandwidth, +#ifdef CONFIG_BATMAN_ADV_DEBUG + &batadv_attr_log_level, +#endif +#ifdef CONFIG_BATMAN_ADV_NC + &batadv_attr_network_coding, +#endif + &batadv_attr_isolation_mark, + NULL, +}; + +BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL); + +/** + * batadv_vlan_attrs - array of vlan specific sysfs attributes + */ +static struct batadv_attribute *batadv_vlan_attrs[] = { + &batadv_attr_vlan_ap_isolation, + NULL, +}; + +int batadv_sysfs_add_meshif(struct net_device *dev) +{ + struct kobject *batif_kobject = &dev->dev.kobj; + struct batadv_priv *bat_priv = netdev_priv(dev); + struct batadv_attribute **bat_attr; + int err; + + bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR, + batif_kobject); + if (!bat_priv->mesh_obj) { + batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name, + BATADV_SYSFS_IF_MESH_SUBDIR); + goto out; + } + + for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) { + err = sysfs_create_file(bat_priv->mesh_obj, + &((*bat_attr)->attr)); + if (err) { + batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n", + dev->name, BATADV_SYSFS_IF_MESH_SUBDIR, + ((*bat_attr)->attr).name); + goto rem_attr; + } + } + + return 0; + +rem_attr: + for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) + sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr)); + + kobject_put(bat_priv->mesh_obj); + bat_priv->mesh_obj = NULL; +out: + return -ENOMEM; +} + +void batadv_sysfs_del_meshif(struct net_device *dev) +{ + struct batadv_priv *bat_priv = netdev_priv(dev); + struct batadv_attribute **bat_attr; + + for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) + sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr)); + + kobject_put(bat_priv->mesh_obj); + bat_priv->mesh_obj = NULL; +} + +/** + * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan + * @dev: netdev of the mesh interface + * @vlan: private data of the newly added VLAN interface + * + * Returns 0 on success and -ENOMEM if any of the structure allocations fails. + */ +int batadv_sysfs_add_vlan(struct net_device *dev, + struct batadv_softif_vlan *vlan) +{ + char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5]; + struct batadv_priv *bat_priv = netdev_priv(dev); + struct batadv_attribute **bat_attr; + int err; + + if (vlan->vid & BATADV_VLAN_HAS_TAG) { + sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu", + vlan->vid & VLAN_VID_MASK); + + vlan->kobj = kobject_create_and_add(vlan_subdir, + bat_priv->mesh_obj); + if (!vlan->kobj) { + batadv_err(dev, "Can't add sysfs directory: %s/%s\n", + dev->name, vlan_subdir); + goto out; + } + } else { + /* the untagged LAN uses the root folder to store its "VLAN + * specific attributes" + */ + vlan->kobj = bat_priv->mesh_obj; + kobject_get(bat_priv->mesh_obj); + } + + for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) { + err = sysfs_create_file(vlan->kobj, + &((*bat_attr)->attr)); + if (err) { + batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n", + dev->name, vlan_subdir, + ((*bat_attr)->attr).name); + goto rem_attr; + } + } + + return 0; + +rem_attr: + for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) + sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr)); + + kobject_put(vlan->kobj); + vlan->kobj = NULL; +out: + return -ENOMEM; +} + +/** + * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN + * @bat_priv: the bat priv with all the soft interface information + * @vlan: the private data of the VLAN to destroy + */ +void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv, + struct batadv_softif_vlan *vlan) +{ + struct batadv_attribute **bat_attr; + + for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) + sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr)); + + kobject_put(vlan->kobj); + vlan->kobj = NULL; +} + +static ssize_t batadv_show_mesh_iface(struct kobject *kobj, + struct attribute *attr, char *buff) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); + struct batadv_hard_iface *hard_iface; + ssize_t length; + const char *ifname; + + hard_iface = batadv_hardif_get_by_netdev(net_dev); + if (!hard_iface) + return 0; + + if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) + ifname = "none"; + else + ifname = hard_iface->soft_iface->name; + + length = sprintf(buff, "%s\n", ifname); + + batadv_hardif_free_ref(hard_iface); + + return length; +} + +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_hard_iface *hard_iface; + int status_tmp = -1; + int ret = count; + + hard_iface = batadv_hardif_get_by_netdev(net_dev); + if (!hard_iface) + return count; + + 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_free_ref(hard_iface); + return -EINVAL; + } + + if (strncmp(buff, "none", 4) == 0) + status_tmp = BATADV_IF_NOT_IN_USE; + else + status_tmp = BATADV_IF_I_WANT_YOU; + + if (hard_iface->if_status == status_tmp) + goto out; + + if ((hard_iface->soft_iface) && + (strncmp(hard_iface->soft_iface->name, buff, 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; + } + + /* if the interface already is in use */ + if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) + batadv_hardif_disable_interface(hard_iface, + BATADV_IF_CLEANUP_AUTO); + + ret = batadv_hardif_enable_interface(hard_iface, buff); + +unlock: + rtnl_unlock(); +out: + batadv_hardif_free_ref(hard_iface); + return ret; +} + +static ssize_t batadv_show_iface_status(struct kobject *kobj, + struct attribute *attr, char *buff) +{ + struct net_device *net_dev = batadv_kobj_to_netdev(kobj); + struct batadv_hard_iface *hard_iface; + ssize_t length; + + hard_iface = batadv_hardif_get_by_netdev(net_dev); + if (!hard_iface) + return 0; + + switch (hard_iface->if_status) { + case BATADV_IF_TO_BE_REMOVED: + length = sprintf(buff, "disabling\n"); + break; + case BATADV_IF_INACTIVE: + length = sprintf(buff, "inactive\n"); + break; + case BATADV_IF_ACTIVE: + length = sprintf(buff, "active\n"); + break; + case BATADV_IF_TO_BE_ACTIVATED: + length = sprintf(buff, "enabling\n"); + break; + case BATADV_IF_NOT_IN_USE: + default: + length = sprintf(buff, "not in use\n"); + break; + } + + batadv_hardif_free_ref(hard_iface); + + return length; +} + +static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface, + batadv_store_mesh_iface); +static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL); + +static struct batadv_attribute *batadv_batman_attrs[] = { + &batadv_attr_mesh_iface, + &batadv_attr_iface_status, + NULL, +}; + +int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev) +{ + struct kobject *hardif_kobject = &dev->dev.kobj; + struct batadv_attribute **bat_attr; + int err; + + *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR, + hardif_kobject); + + if (!*hardif_obj) { + batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name, + BATADV_SYSFS_IF_BAT_SUBDIR); + goto out; + } + + for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) { + err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr)); + if (err) { + batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n", + dev->name, BATADV_SYSFS_IF_BAT_SUBDIR, + ((*bat_attr)->attr).name); + goto rem_attr; + } + } + + return 0; + +rem_attr: + for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) + sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr)); +out: + return -ENOMEM; +} + +void batadv_sysfs_del_hardif(struct kobject **hardif_obj) +{ + kobject_put(*hardif_obj); + *hardif_obj = NULL; +} + +int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type, + enum batadv_uev_action action, const char *data) +{ + int ret = -ENOMEM; + struct kobject *bat_kobj; + char *uevent_env[4] = { NULL, NULL, NULL, NULL }; + + bat_kobj = &bat_priv->soft_iface->dev.kobj; + + uevent_env[0] = kasprintf(GFP_ATOMIC, + "%s%s", BATADV_UEV_TYPE_VAR, + batadv_uev_type_str[type]); + if (!uevent_env[0]) + goto out; + + uevent_env[1] = kasprintf(GFP_ATOMIC, + "%s%s", BATADV_UEV_ACTION_VAR, + batadv_uev_action_str[action]); + if (!uevent_env[1]) + goto out; + + /* If the event is DEL, ignore the data field */ + if (action != BATADV_UEV_DEL) { + uevent_env[2] = kasprintf(GFP_ATOMIC, + "%s%s", BATADV_UEV_DATA_VAR, data); + if (!uevent_env[2]) + goto out; + } + + ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env); +out: + kfree(uevent_env[0]); + kfree(uevent_env[1]); + kfree(uevent_env[2]); + + if (ret) + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n", + batadv_uev_type_str[type], + batadv_uev_action_str[action], + (action == BATADV_UEV_DEL ? "NULL" : data), ret); + return ret; +} |