diff options
author | Antonio Quartulli <antonio@open-mesh.com> | 2013-07-30 22:16:25 +0200 |
---|---|---|
committer | Antonio Quartulli <antonio@meshcoding.com> | 2013-10-19 23:25:12 +0200 |
commit | 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b (patch) | |
tree | 02803d96cc171936e7c973f389ec19f7e0295a97 /net/batman-adv | |
parent | a70a9aa990bdf24039cb4167993bcc5a0f9cbb18 (diff) |
batman-adv: make the TT CRC logic VLAN specific
This change allows nodes to handle the TT table on a
per-VLAN basis. This is needed because nodes may have to
store only some of the global entries advertised by another
node.
In this scenario such nodes would re-create only a partial
global table and would not be able to compute a correct CRC
anymore.
This patch splits the logic and introduces one CRC per VLAN.
In this way a node fetching only some entries belonging to
some VLANs is still able to compute the needed CRCs and
still check the table correctness.
With this patch the shape of the TVLV-TT is changed too
because now a node needs to advertise all the CRCs of all
the VLANs that it is wired to.
The debug output of the local Translation Table now shows
the CRC along with each entry since there is not a common
value for the entire table anymore.
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r-- | net/batman-adv/originator.c | 101 | ||||
-rw-r--r-- | net/batman-adv/originator.h | 7 | ||||
-rw-r--r-- | net/batman-adv/packet.h | 18 | ||||
-rw-r--r-- | net/batman-adv/translation-table.c | 720 | ||||
-rw-r--r-- | net/batman-adv/types.h | 41 |
5 files changed, 730 insertions, 157 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 867778e8184d..7a499dad53d3 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -44,6 +44,88 @@ static int batadv_compare_orig(const struct hlist_node *node, const void *data2) return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); } +/** + * batadv_orig_node_vlan_get - get an orig_node_vlan object + * @orig_node: the originator serving the VLAN + * @vid: the VLAN identifier + * + * Returns the vlan object identified by vid and belonging to orig_node or NULL + * if it does not exist. + */ +struct batadv_orig_node_vlan * +batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, + unsigned short vid) +{ + struct batadv_orig_node_vlan *vlan = NULL, *tmp; + + rcu_read_lock(); + list_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { + if (tmp->vid != vid) + continue; + + if (!atomic_inc_not_zero(&tmp->refcount)) + continue; + + vlan = tmp; + + break; + } + rcu_read_unlock(); + + return vlan; +} + +/** + * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan + * object + * @orig_node: the originator serving the VLAN + * @vid: the VLAN identifier + * + * Returns NULL in case of failure or the vlan object identified by vid and + * belonging to orig_node otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_orig_node_vlan * +batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, + unsigned short vid) +{ + struct batadv_orig_node_vlan *vlan; + + spin_lock_bh(&orig_node->vlan_list_lock); + + /* first look if an object for this vid already exists */ + vlan = batadv_orig_node_vlan_get(orig_node, vid); + if (vlan) + goto out; + + vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); + if (!vlan) + goto out; + + atomic_set(&vlan->refcount, 2); + vlan->vid = vid; + + list_add_rcu(&vlan->list, &orig_node->vlan_list); + +out: + spin_unlock_bh(&orig_node->vlan_list_lock); + + return vlan; +} + +/** + * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free + * the originator-vlan object + * @orig_vlan: the originator-vlan object to release + */ +void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) +{ + if (atomic_dec_and_test(&orig_vlan->refcount)) + kfree_rcu(orig_vlan, rcu); +} + int batadv_originator_init(struct batadv_priv *bat_priv) { if (bat_priv->orig_hash) @@ -218,6 +300,7 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv, const uint8_t *addr) { struct batadv_orig_node *orig_node; + struct batadv_orig_node_vlan *vlan; int size, i; int hash_added; unsigned long reset_time; @@ -235,11 +318,13 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv, INIT_HLIST_HEAD(&orig_node->neigh_list); INIT_LIST_HEAD(&orig_node->bond_list); + INIT_LIST_HEAD(&orig_node->vlan_list); spin_lock_init(&orig_node->ogm_cnt_lock); spin_lock_init(&orig_node->bcast_seqno_lock); spin_lock_init(&orig_node->neigh_list_lock); spin_lock_init(&orig_node->tt_buff_lock); spin_lock_init(&orig_node->tt_lock); + spin_lock_init(&orig_node->vlan_list_lock); batadv_nc_init_orig(orig_node); @@ -251,22 +336,30 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv, memcpy(orig_node->orig, addr, ETH_ALEN); batadv_dat_init_orig_node_addr(orig_node); orig_node->router = NULL; - orig_node->tt_crc = 0; atomic_set(&orig_node->last_ttvn, 0); orig_node->tt_buff = NULL; orig_node->tt_buff_len = 0; - atomic_set(&orig_node->tt_size, 0); reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); orig_node->bcast_seqno_reset = reset_time; orig_node->batman_seqno_reset = reset_time; atomic_set(&orig_node->bond_candidates, 0); + /* create a vlan object for the "untagged" LAN */ + vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); + if (!vlan) + goto free_orig_node; + /* batadv_orig_node_vlan_new() increases the refcounter. + * Immediately release vlan since it is not needed anymore in this + * context + */ + batadv_orig_node_vlan_free_ref(vlan); + size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; orig_node->bcast_own = kzalloc(size, GFP_ATOMIC); if (!orig_node->bcast_own) - goto free_orig_node; + goto free_vlan; size = bat_priv->num_ifaces * sizeof(uint8_t); orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC); @@ -291,6 +384,8 @@ free_bcast_own_sum: kfree(orig_node->bcast_own_sum); free_bcast_own: kfree(orig_node->bcast_own); +free_vlan: + batadv_orig_node_vlan_free_ref(vlan); free_orig_node: kfree(orig_node); return NULL; diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index 7887b84a9af4..cc6d686cfe6d 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -40,6 +40,13 @@ int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num); int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, int max_if_num); +struct batadv_orig_node_vlan * +batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, + unsigned short vid); +struct batadv_orig_node_vlan * +batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, + unsigned short vid); +void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan); /* hashfunction to choose an entry in a hash table of given size diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 6311642f3ee8..9fbcaacc345a 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -391,14 +391,26 @@ struct batadv_tvlv_gateway_data { * struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container * @flags: translation table flags (see batadv_tt_data_flags) * @ttvn: translation table version number - * @reserved: field reserved for future use - * @crc: crc32 checksum of the local translation table + * @vlan_num: number of announced VLANs. In the TVLV this struct is followed by + * one batadv_tvlv_tt_vlan_data object per announced vlan */ struct batadv_tvlv_tt_data { uint8_t flags; uint8_t ttvn; + __be16 num_vlan; +}; + +/** + * struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through + * the tt tvlv container + * @crc: crc32 checksum of the entries belonging to this vlan + * @vid: vlan identifier + * @reserved: unused, useful for alignment purposes + */ +struct batadv_tvlv_tt_vlan_data { + __be32 crc; + __be16 vid; uint16_t reserved; - __be32 crc; }; /** diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 00f4faa69c07..41a8387c5ef8 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -208,13 +208,107 @@ static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) kfree(orig_entry); } +/** + * batadv_tt_local_size_mod - change the size by v of the local table identified + * by vid + * @bat_priv: the bat priv with all the soft interface information + * @vid: the VLAN identifier of the sub-table to change + * @v: the amount to sum to the local table size + */ +static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, + unsigned short vid, int v) +{ + struct batadv_softif_vlan *vlan; + + vlan = batadv_softif_vlan_get(bat_priv, vid); + if (!vlan) + return; + + atomic_add(v, &vlan->tt.num_entries); + + batadv_softif_vlan_free_ref(vlan); +} + +/** + * batadv_tt_local_size_inc - increase by one the local table size for the given + * vid + * @bat_priv: the bat priv with all the soft interface information + * @vid: the VLAN identifier + */ +static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, + unsigned short vid) +{ + batadv_tt_local_size_mod(bat_priv, vid, 1); +} + +/** + * batadv_tt_local_size_dec - decrease by one the local table size for the given + * vid + * @bat_priv: the bat priv with all the soft interface information + * @vid: the VLAN identifier + */ +static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, + unsigned short vid) +{ + batadv_tt_local_size_mod(bat_priv, vid, -1); +} + +/** + * batadv_tt_global_size_mod - change the size by v of the local table + * identified by vid + * @bat_priv: the bat priv with all the soft interface information + * @vid: the VLAN identifier + * @v: the amount to sum to the global table size + */ +static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, + unsigned short vid, int v) +{ + struct batadv_orig_node_vlan *vlan; + + vlan = batadv_orig_node_vlan_new(orig_node, vid); + if (!vlan) + return; + + if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { + spin_lock_bh(&orig_node->vlan_list_lock); + list_del_rcu(&vlan->list); + spin_unlock_bh(&orig_node->vlan_list_lock); + batadv_orig_node_vlan_free_ref(vlan); + } + + batadv_orig_node_vlan_free_ref(vlan); +} + +/** + * batadv_tt_global_size_inc - increase by one the global table size for the + * given vid + * @orig_node: the originator which global table size has to be decreased + * @vid: the vlan identifier + */ +static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, + unsigned short vid) +{ + batadv_tt_global_size_mod(orig_node, vid, 1); +} + +/** + * batadv_tt_global_size_dec - decrease by one the global table size for the + * given vid + * @orig_node: the originator which global table size has to be decreased + * @vid: the vlan identifier + */ +static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, + unsigned short vid) +{ + batadv_tt_global_size_mod(orig_node, vid, -1); +} + static void batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) { if (!atomic_dec_and_test(&orig_entry->refcount)) return; - /* to avoid race conditions, immediately decrease the tt counter */ - atomic_dec(&orig_entry->orig_node->tt_size); + call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); } @@ -464,6 +558,149 @@ out: } /** + * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send + * within a TT Response directed to another node + * @orig_node: originator for which the TT data has to be prepared + * @tt_data: uninitialised pointer to the address of the TVLV buffer + * @tt_change: uninitialised pointer to the address of the area where the TT + * changed can be stored + * @tt_len: pointer to the length to reserve to the tt_change. if -1 this + * function reserves the amount of space needed to send the entire global TT + * table. In case of success the value is updated with the real amount of + * reserved bytes + + * Allocate the needed amount of memory for the entire TT TVLV and write its + * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data + * objects, one per active VLAN served by the originator node. + * + * Return the size of the allocated buffer or 0 in case of failure. + */ +static uint16_t +batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, + struct batadv_tvlv_tt_data **tt_data, + struct batadv_tvlv_tt_change **tt_change, + int32_t *tt_len) +{ + uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; + struct batadv_tvlv_tt_vlan_data *tt_vlan; + struct batadv_orig_node_vlan *vlan; + uint8_t *tt_change_ptr; + + rcu_read_lock(); + list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { + num_vlan++; + num_entries += atomic_read(&vlan->tt.num_entries); + } + + change_offset = sizeof(**tt_data); + change_offset += num_vlan * sizeof(*tt_vlan); + + /* if tt_len is negative, allocate the space needed by the full table */ + if (*tt_len < 0) + *tt_len = batadv_tt_len(num_entries); + + tvlv_len = *tt_len; + tvlv_len += change_offset; + + *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); + if (!*tt_data) { + *tt_len = 0; + goto out; + } + + (*tt_data)->flags = BATADV_NO_FLAGS; + (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); + (*tt_data)->num_vlan = htons(num_vlan); + + tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); + list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { + tt_vlan->vid = htons(vlan->vid); + tt_vlan->crc = htonl(vlan->tt.crc); + + tt_vlan++; + } + + tt_change_ptr = (uint8_t *)*tt_data + change_offset; + *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; + +out: + rcu_read_unlock(); + return tvlv_len; +} + +/** + * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this + * node + * @bat_priv: the bat priv with all the soft interface information + * @tt_data: uninitialised pointer to the address of the TVLV buffer + * @tt_change: uninitialised pointer to the address of the area where the TT + * changes can be stored + * @tt_len: pointer to the length to reserve to the tt_change. if -1 this + * function reserves the amount of space needed to send the entire local TT + * table. In case of success the value is updated with the real amount of + * reserved bytes + * + * Allocate the needed amount of memory for the entire TT TVLV and write its + * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data + * objects, one per active VLAN. + * + * Return the size of the allocated buffer or 0 in case of failure. + */ +static uint16_t +batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, + struct batadv_tvlv_tt_data **tt_data, + struct batadv_tvlv_tt_change **tt_change, + int32_t *tt_len) +{ + struct batadv_tvlv_tt_vlan_data *tt_vlan; + struct batadv_softif_vlan *vlan; + uint16_t num_vlan = 0, num_entries = 0, tvlv_len; + uint8_t *tt_change_ptr; + int change_offset; + + rcu_read_lock(); + hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { + num_vlan++; + num_entries += atomic_read(&vlan->tt.num_entries); + } + + change_offset = sizeof(**tt_data); + change_offset += num_vlan * sizeof(*tt_vlan); + + /* if tt_len is negative, allocate the space needed by the full table */ + if (*tt_len < 0) + *tt_len = batadv_tt_len(num_entries); + + tvlv_len = *tt_len; + tvlv_len += change_offset; + + *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); + if (!*tt_data) { + tvlv_len = 0; + goto out; + } + + (*tt_data)->flags = BATADV_NO_FLAGS; + (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); + (*tt_data)->num_vlan = htons(num_vlan); + + tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); + hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { + tt_vlan->vid = htons(vlan->vid); + tt_vlan->crc = htonl(vlan->tt.crc); + + tt_vlan++; + } + + tt_change_ptr = (uint8_t *)*tt_data + change_offset; + *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; + +out: + rcu_read_unlock(); + return tvlv_len; +} + +/** * batadv_tt_tvlv_container_update - update the translation table tvlv container * after local tt changes have been committed * @bat_priv: the bat priv with all the soft interface information @@ -473,10 +710,12 @@ static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) struct batadv_tt_change_node *entry, *safe; struct batadv_tvlv_tt_data *tt_data; struct batadv_tvlv_tt_change *tt_change; - int tt_diff_len = 0, tt_change_len = 0; + int tt_diff_len, tt_change_len = 0; int tt_diff_entries_num = 0, tt_diff_entries_count = 0; + uint16_t tvlv_len; - tt_diff_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); + tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); + tt_diff_len = batadv_tt_len(tt_diff_entries_num); /* if we have too many changes for one packet don't send any * and wait for the tt table request which will be fragmented @@ -484,24 +723,19 @@ static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) if (tt_diff_len > bat_priv->soft_iface->mtu) tt_diff_len = 0; - tt_data = kzalloc(sizeof(*tt_data) + tt_diff_len, GFP_ATOMIC); - if (!tt_data) + tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, + &tt_change, &tt_diff_len); + if (!tvlv_len) return; tt_data->flags = BATADV_TT_OGM_DIFF; - tt_data->ttvn = atomic_read(&bat_priv->tt.vn); - tt_data->crc = htonl(bat_priv->tt.local_crc); if (tt_diff_len == 0) goto container_register; - tt_diff_entries_num = batadv_tt_entries(tt_diff_len); - spin_lock_bh(&bat_priv->tt.changes_list_lock); atomic_set(&bat_priv->tt.local_changes, 0); - tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); - list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, list) { if (tt_diff_entries_count < tt_diff_entries_num) { @@ -537,7 +771,7 @@ static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) container_register: batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, - sizeof(*tt_data) + tt_change_len); + tvlv_len); kfree(tt_data); } @@ -549,7 +783,9 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) struct batadv_tt_common_entry *tt_common_entry; struct batadv_tt_local_entry *tt_local; struct batadv_hard_iface *primary_if; + struct batadv_softif_vlan *vlan; struct hlist_head *head; + unsigned short vid; uint32_t i; int last_seen_secs; int last_seen_msecs; @@ -562,11 +798,10 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) goto out; seq_printf(seq, - "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.8x):\n", - net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn), - bat_priv->tt.local_crc); - seq_printf(seq, " %-13s %s %-7s %-10s\n", "Client", "VID", - "Flags", "Last seen"); + "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", + net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); + seq_printf(seq, " %-13s %s %-7s %-9s (%-10s)\n", "Client", "VID", + "Flags", "Last seen", "CRC"); for (i = 0; i < hash->size; i++) { head = &hash->table[i]; @@ -577,6 +812,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) tt_local = container_of(tt_common_entry, struct batadv_tt_local_entry, common); + vid = tt_common_entry->vid; last_seen_jiffies = jiffies - tt_local->last_seen; last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); last_seen_secs = last_seen_msecs / 1000; @@ -584,7 +820,15 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) no_purge = tt_common_entry->flags & np_flag; - seq_printf(seq, " * %pM %4i [%c%c%c%c%c] %3u.%03u\n", + vlan = batadv_softif_vlan_get(bat_priv, vid); + if (!vlan) { + seq_printf(seq, "Cannot retrieve VLAN %d\n", + BATADV_PRINT_VID(vid)); + continue; + } + + seq_printf(seq, + " * %pM %4i [%c%c%c%c%c] %3u.%03u (%#.8x)\n", tt_common_entry->addr, BATADV_PRINT_VID(tt_common_entry->vid), (tt_common_entry->flags & @@ -597,7 +841,10 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) (tt_common_entry->flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), no_purge ? 0 : last_seen_secs, - no_purge ? 0 : last_seen_msecs); + no_purge ? 0 : last_seen_msecs, + vlan->tt.crc); + + batadv_softif_vlan_free_ref(vlan); } rcu_read_unlock(); } @@ -860,7 +1107,7 @@ batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, INIT_HLIST_NODE(&orig_entry->list); atomic_inc(&orig_node->refcount); - atomic_inc(&orig_node->tt_size); + batadv_tt_global_size_inc(orig_node, tt_global->common.vid); orig_entry->orig_node = orig_node; orig_entry->ttvn = ttvn; atomic_set(&orig_entry->refcount, 2); @@ -1070,45 +1317,71 @@ static void batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, struct seq_file *seq) { - struct hlist_head *head; struct batadv_tt_orig_list_entry *orig_entry, *best_entry; struct batadv_tt_common_entry *tt_common_entry; - uint16_t flags; + struct batadv_orig_node_vlan *vlan; + struct hlist_head *head; uint8_t last_ttvn; + uint16_t flags; tt_common_entry = &tt_global_entry->common; flags = tt_common_entry->flags; best_entry = batadv_transtable_best_orig(tt_global_entry); if (best_entry) { + vlan = batadv_orig_node_vlan_get(best_entry->orig_node, + tt_common_entry->vid); + if (!vlan) { + seq_printf(seq, + " * Cannot retrieve VLAN %d for originator %pM\n", + BATADV_PRINT_VID(tt_common_entry->vid), + best_entry->orig_node->orig); + goto print_list; + } + last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); seq_printf(seq, " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", '*', tt_global_entry->common.addr, BATADV_PRINT_VID(tt_global_entry->common.vid), best_entry->ttvn, best_entry->orig_node->orig, - last_ttvn, best_entry->orig_node->tt_crc, + last_ttvn, vlan->tt.crc, (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); + + batadv_orig_node_vlan_free_ref(vlan); } +print_list: head = &tt_global_entry->orig_list; hlist_for_each_entry_rcu(orig_entry, head, list) { if (best_entry == orig_entry) continue; + vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, + tt_common_entry->vid); + if (!vlan) { + seq_printf(seq, + " + Cannot retrieve VLAN %d for originator %pM\n", + BATADV_PRINT_VID(tt_common_entry->vid), + orig_entry->orig_node->orig); + continue; + } + last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); seq_printf(seq, - " %c %pM %4d (%3u) via %pM (%3u) [%c%c%c]\n", + " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", '+', tt_global_entry->common.addr, BATADV_PRINT_VID(tt_global_entry->common.vid), orig_entry->ttvn, orig_entry->orig_node->orig, - last_ttvn, + last_ttvn, vlan->tt.crc, (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); + + batadv_orig_node_vlan_free_ref(vlan); } } @@ -1165,6 +1438,8 @@ batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) head = &tt_global_entry->orig_list; hlist_for_each_entry_safe(orig_entry, safe, head, list) { hlist_del_rcu(&orig_entry->list); + batadv_tt_global_size_dec(orig_entry->orig_node, + tt_global_entry->common.vid); batadv_tt_orig_list_entry_free_ref(orig_entry); } spin_unlock_bh(&tt_global_entry->list_lock); @@ -1192,6 +1467,8 @@ batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, tt_global_entry->common.addr, BATADV_PRINT_VID(vid), message); hlist_del_rcu(&orig_entry->list); + batadv_tt_global_size_dec(orig_node, + tt_global_entry->common.vid); batadv_tt_orig_list_entry_free_ref(orig_entry); } } @@ -1535,6 +1812,7 @@ out: * to the given orig_node * @bat_priv: the bat priv with all the soft interface information * @orig_node: originator for which the CRC should be computed + * @vid: VLAN identifier for which the CRC32 has to be computed * * This function computes the checksum for the global table corresponding to a * specific originator. In particular, the checksum is computed as follows: For @@ -1554,7 +1832,8 @@ out: * Returns the checksum of the global table of a given originator. */ static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig_node) + struct batadv_orig_node *orig_node, + unsigned short vid) { struct batadv_hashtable *hash = bat_priv->tt.global_hash; struct batadv_tt_common_entry *tt_common; @@ -1570,6 +1849,12 @@ static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, tt_global = container_of(tt_common, struct batadv_tt_global_entry, common); + /* compute the CRC only for entries belonging to the + * VLAN identified by the vid passed as parameter + */ + if (tt_common->vid != vid) + continue; + /* Roaming clients are in the global table for * consistency only. They don't have to be * taken into account while computing the @@ -1604,13 +1889,15 @@ static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, /** * batadv_tt_local_crc - calculates the checksum of the local table * @bat_priv: the bat priv with all the soft interface information + * @vid: VLAN identifier for which the CRC32 has to be computed * * For details about the computation, please refer to the documentation for * batadv_tt_global_crc(). * * Returns the checksum of the local table */ -static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv) +static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, + unsigned short vid) { struct batadv_hashtable *hash = bat_priv->tt.local_hash; struct batadv_tt_common_entry *tt_common; @@ -1622,6 +1909,12 @@ static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv) rcu_read_lock(); hlist_for_each_entry_rcu(tt_common, head, hash_entry) { + /* compute the CRC only for entries belonging to the + * VLAN identified by vid + */ + if (tt_common->vid != vid) + continue; + /* not yet committed clients have not to be taken into * account while computing the CRC */ @@ -1753,44 +2046,29 @@ static int batadv_tt_global_valid(const void *entry_ptr, } /** - * batadv_tt_tvlv_generate - creates tvlv tt data buffer to fill it with the - * tt entries from the specified tt hash + * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the + * specified tt hash * @bat_priv: the bat priv with all the soft interface information * @hash: hash table containing the tt entries * @tt_len: expected tvlv tt data buffer length in number of bytes + * @tvlv_buff: pointer to the buffer to fill with the TT data * @valid_cb: function to filter tt change entries * @cb_data: data passed to the filter function as argument - * - * Returns pointer to allocated tvlv tt data buffer if operation was - * successful or NULL otherwise. */ -static struct batadv_tvlv_tt_data * -batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, - struct batadv_hashtable *hash, uint16_t tt_len, - int (*valid_cb)(const void *, const void *), - void *cb_data) +static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, + struct batadv_hashtable *hash, + void *tvlv_buff, uint16_t tt_len, + int (*valid_cb)(const void *, const void *), + void *cb_data) { struct batadv_tt_common_entry *tt_common_entry; - struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; struct batadv_tvlv_tt_change *tt_change; struct hlist_head *head; uint16_t tt_tot, tt_num_entries = 0; - ssize_t tvlv_tt_size = sizeof(struct batadv_tvlv_tt_data); uint32_t i; - if (tvlv_tt_size + tt_len > bat_priv->soft_iface->mtu) { - tt_len = bat_priv->soft_iface->mtu - tvlv_tt_size; - tt_len -= tt_len % sizeof(struct batadv_tvlv_tt_change); - } - tt_tot = batadv_tt_entries(tt_len); - - tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, - GFP_ATOMIC); - if (!tvlv_tt_data) - goto out; - - tt_change = (struct batadv_tvlv_tt_change *)(tvlv_tt_data + 1); + tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; rcu_read_lock(); for (i = 0; i < hash->size; i++) { @@ -1815,9 +2093,89 @@ batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, } } rcu_read_unlock(); +} -out: - return tvlv_tt_data; +/** + * batadv_tt_global_check_crc - check if all the CRCs are correct + * @orig_node: originator for which the CRCs have to be checked + * @tt_vlan: pointer to the first tvlv VLAN entry + * @num_vlan: number of tvlv VLAN entries + * @create: if true, create VLAN objects if not found + * + * Return true if all the received CRCs match the locally stored ones, false + * otherwise + */ +static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, + struct batadv_tvlv_tt_vlan_data *tt_vlan, + uint16_t num_vlan) +{ + struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; + struct batadv_orig_node_vlan *vlan; + int i; + + /* check if each received CRC matches the locally stored one */ + for (i = 0; i < num_vlan; i++) { + tt_vlan_tmp = tt_vlan + i; + + /* if orig_node is a backbone node for this VLAN, don't check + * the CRC as we ignore all the global entries over it + */ + if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, + orig_node->orig)) + continue; + + vlan = batadv_orig_node_vlan_get(orig_node, + ntohs(tt_vlan_tmp->vid)); + if (!vlan) + return false; + + if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc)) + return false; + } + + return true; +} + +/** + * batadv_tt_local_update_crc - update all the local CRCs + * @bat_priv: the bat priv with all the soft interface information + */ +static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) +{ + struct batadv_softif_vlan *vlan; + + /* recompute the global CRC for each VLAN */ + rcu_read_lock(); + hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { + vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); + } + rcu_read_unlock(); +} + +/** + * batadv_tt_global_update_crc - update all the global CRCs for this orig_node + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: the orig_node for which the CRCs have to be updated + */ +static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node) +{ + struct batadv_orig_node_vlan *vlan; + uint32_t crc; + + /* recompute the global CRC for each VLAN */ + rcu_read_lock(); + list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { + /* if orig_node is a backbone node for this VLAN, don't compute + * the CRC as we ignore all the global entries over it + */ + if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) + continue; + + crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); + vlan->tt.crc = crc; + } + rcu_read_unlock(); } /** @@ -1825,19 +2183,23 @@ out: * @bat_priv: the bat priv with all the soft interface information * @dst_orig_node: the destination of the message * @ttvn: the version number that the source of the message is looking for - * @tt_crc: the CRC associated with the version number + * @tt_vlan: pointer to the first tvlv VLAN object to request + * @num_vlan: number of tvlv VLAN entries * @full_table: ask for the entire translation table if true, while only for the * last TT diff otherwise */ static int batadv_send_tt_request(struct batadv_priv *bat_priv, struct batadv_orig_node *dst_orig_node, - uint8_t ttvn, uint32_t tt_crc, - bool full_table) + uint8_t ttvn, + struct batadv_tvlv_tt_vlan_data *tt_vlan, + uint16_t num_vlan, bool full_table) { struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; - struct batadv_hard_iface *primary_if; struct batadv_tt_req_node *tt_req_node = NULL; + struct batadv_tvlv_tt_vlan_data *tt_vlan_req; + struct batadv_hard_iface *primary_if; bool ret = false; + int i, size; primary_if = batadv_primary_if_get_selected(bat_priv); if (!primary_if) @@ -1850,13 +2212,26 @@ static int batadv_send_tt_request(struct batadv_priv *bat_priv, if (!tt_req_node) goto out; - tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data), GFP_ATOMIC); + size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; + tvlv_tt_data = kzalloc(size, GFP_ATOMIC); if (!tvlv_tt_data) goto out; tvlv_tt_data->flags = BATADV_TT_REQUEST; tvlv_tt_data->ttvn = ttvn; - tvlv_tt_data->crc = htonl(tt_crc); + tvlv_tt_data->num_vlan = htons(num_vlan); + + /* send all the CRCs within the request. This is needed by intermediate + * nodes to ensure they have the correct table before replying + */ + tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); + for (i = 0; i < num_vlan; i++) { + tt_vlan_req->vid = tt_vlan->vid; + tt_vlan_req->crc = tt_vlan->crc; + + tt_vlan_req++; + tt_vlan++; + } if (full_table) tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; @@ -1867,7 +2242,7 @@ static int batadv_send_tt_request(struct batadv_priv *bat_priv, batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, dst_orig_node->orig, BATADV_TVLV_TT, 1, - tvlv_tt_data, sizeof(*tvlv_tt_data)); + tvlv_tt_data, size); ret = true; out: @@ -1899,10 +2274,13 @@ static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, { struct batadv_orig_node *req_dst_orig_node; struct batadv_orig_node *res_dst_orig_node = NULL; + struct batadv_tvlv_tt_change *tt_change; struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; - uint8_t orig_ttvn, req_ttvn; - uint16_t tt_len; + struct batadv_tvlv_tt_vlan_data *tt_vlan; bool ret = false, full_table; + uint8_t orig_ttvn, req_ttvn; + uint16_t tvlv_len; + int32_t tt_len; batadv_dbg(BATADV_DBG_TT, bat_priv, "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", @@ -1921,9 +2299,11 @@ static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); req_ttvn = tt_data->ttvn; + tt_vlan = (str |