/* Copyright (C) 2010-2017 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 . */ #include "sysfs.h" #include "main.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bridge_loop_avoidance.h" #include "distributed-arp-table.h" #include "gateway_client.h" #include "gateway_common.h" #include "hard-interface.h" #include "log.h" #include "network-coding.h" #include "packet.h" #include "soft-interface.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 * * Return: 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 * @bat_priv: the bat priv with all the soft interface information * @obj: kobject to covert * * Return: 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 (!kref_get_unless_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", "loopdetect", }; static char *batadv_uev_type_str[] = { "gw", "bla", }; /* 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, _var, _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->_var, net_dev); \ } #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \ 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->_var)); \ } \ /* 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, _var, _mode, _min, _max, _post_func)\ static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\ static BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \ 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_put(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_put(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) #define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _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_hard_iface *hard_iface; \ ssize_t length; \ \ hard_iface = batadv_hardif_get_by_netdev(net_dev); \ if (!hard_iface) \ return 0; \ \ length = __batadv_store_uint_attr(buff, count, _min, _max, \ _post_func, attr, \ &hard_iface->_var, net_dev); \ \ batadv_hardif_put(hard_iface); \ return length; \ } #define BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \ ssize_t batadv_show_##_name(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; \ \ length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \ \ batadv_hardif_put(hard_iface); \ return length; \ } /* Use this, if you are going to set [name] in hard_iface to an * unsigned integer value */ #define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\ static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, \ _max, _post_func) \ static BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \ static BATADV_ATTR(_name, _mode, batadv_show_##_name, \ batadv_store_##_name) static int batadv_store_bool_attr(char *buff, size_t count, struct net_device *net_dev, const char *attr_name, atomic_t *attr, bool *changed) { int enabled = -1; *changed = false; 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"); *changed = true; 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) { bool changed; int ret; ret = batadv_store_bool_attr(buff, count, net_dev, attr->name, attr_store, &changed); if (post_func && changed) 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 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->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; /* 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", 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; /* 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'; 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_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) { struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); u32 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 * * Return: 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 * * Return: '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); u32 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, 0644, NULL); BATADV_ATTR_SIF_BOOL(bonding, 0644, NULL); #ifdef CONFIG_BATMAN_ADV_BLA BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, 0644, batadv_bla_status_update); #endif #ifdef CONFIG_BATMAN_ADV_DAT BATADV_ATTR_SIF_BOOL(distributed_arp_table, 0644, batadv_dat_status_update); #endif BATADV_ATTR_SIF_BOOL(fragmentation, 0644, batadv_update_min_mtu); static BATADV_ATTR(routing_algo, 0444, batadv_show_bat_algo, NULL); static BATADV_ATTR(gw_mode, 0644, batadv_show_gw_mode, batadv_store_gw_mode); BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, 0644, 2 * BATADV_JITTER, INT_MAX, NULL); BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, 0644, 0, BATADV_TQ_MAX_VALUE, NULL); static BATADV_ATTR(gw_sel_class, 0644, batadv_show_gw_sel_class, batadv_store_gw_sel_class); static BATADV_ATTR(gw_bandwidth, 0644, batadv_show_gw_bwidth, batadv_store_gw_bwidth); #ifdef CONFIG_BATMAN_ADV_MCAST BATADV_ATTR_SIF_BOOL(multicast_mode, 0644, NULL); #endif #ifdef CONFIG_BATMAN_ADV_DEBUG BATADV_ATTR_SIF_UINT(log_level, log_level, 0644, 0, BATADV_DBG_ALL, NULL); #endif #ifdef CONFIG_BATMAN_ADV_NC BATADV_ATTR_SIF_BOOL(network_coding, 0644, batadv_nc_status_update); #endif static BATADV_ATTR(isolation_mark, 0644, 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, 0644, NULL); /* 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_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: 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_uevent(bat_priv->mesh_obj, KOBJ_REMOVE); kobject_del(bat_priv->mesh_obj); 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 * * Return: 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)); 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: 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)); if (vlan->kobj != bat_priv->mesh_obj) { kobject_uevent(vlan->kobj, KOBJ_REMOVE); kobject_del(vlan->kobj); } 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_put(hard_iface); return length; } /** * 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 *net = dev_net(net_dev); struct batadv_hard_iface *hard_iface; int status_tmp; int ret = 0; ASSERT_RTNL(); hard_iface = batadv_hardif_get_by_netdev(net_dev); if (!hard_iface) return 0; if (strncmp(ifname, "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, ifname, IFNAMSIZ) == 0) goto out; if (status_tmp == BATADV_IF_NOT_IN_USE) { batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_AUTO); goto out; } /* 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, 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) { 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_put(hard_iface); return length; } #ifdef CONFIG_BATMAN_ADV_BATMAN_V /** * batadv_store_throughput_override - parse and store throughput override * 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 * * Return: 'count' on success or a negative error code in case of failure */ static ssize_t batadv_store_throughput_override(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; u32 tp_override; u32 old_tp_override; bool ret; hard_iface = batadv_hardif_get_by_netdev(net_dev); if (!hard_iface) return -EINVAL; if (buff[count - 1] == '\n') buff[count - 1] = '\0'; ret = batadv_parse_throughput(net_dev, buff, "throughput_override", &tp_override); if (!ret) return count; old_tp_override = atomic_read(&hard_iface->bat_v.throughput_override); if (old_tp_override == tp_override) goto out; batadv_info(net_dev, "%s: Changing from: %u.%u MBit to: %u.%u MBit\n", "throughput_override", old_tp_override / 10, old_tp_override % 10, tp_override / 10, tp_override % 10); atomic_set(&hard_iface->bat_v.throughput_override, tp_override); out: batadv_hardif_put(hard_iface); return count; } static ssize_t batadv_show_throughput_override(struct kobject *kobj, struct attribute *attr, char *buff) { struct net_device *net_dev = batadv_kobj_to_netdev(kobj); struct batadv_hard_iface *hard_iface; u32 tp_override; hard_iface = batadv_hardif_get_by_netdev(net_dev); if (!hard_iface) return -EINVAL; tp_override = atomic_read(&hard_iface->bat_v.throughput_override); return sprintf(buff, "%u.%u MBit\n", tp_override / 10, tp_override % 10); } #endif static BATADV_ATTR(mesh_iface, 0644, batadv_show_mesh_iface, batadv_store_mesh_iface); static BATADV_ATTR(iface_status, 0444, batadv_show_iface_status, NULL); #ifdef CONFIG_BATMAN_ADV_BATMAN_V BATADV_ATTR_HIF_UINT(elp_interval, bat_v.elp_interval, 0644, 2 * BATADV_JITTER, INT_MAX, NULL); static BATADV_ATTR(throughput_override, 0644, batadv_show_throughput_override, batadv_store_throughput_override); #endif static struct batadv_attribute *batadv_batman_attrs[] = { &batadv_attr_mesh_iface, &batadv_attr_iface_status, #ifdef CONFIG_BATMAN_ADV_BATMAN_V &batadv_attr_elp_interval, &batadv_attr_throughput_override, #endif 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_uevent(*hardif_obj, KOBJ_REMOVE); kobject_del(*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; }