1083 lines
28 KiB
C
1083 lines
28 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2007 - 2017 Realtek Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*****************************************************************************/
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#define _RTW_MESH_PATHTBL_C_
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#ifdef CONFIG_RTW_MESH
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#include <drv_types.h>
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#include <linux/jhash.h>
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#ifdef PLATFORM_LINUX
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0))
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static void rtw_mpath_free_rcu(struct rtw_mesh_path *mpath)
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{
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kfree_rcu(mpath, rcu);
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rtw_mstat_update(MSTAT_TYPE_PHY, MSTAT_FREE, sizeof(struct rtw_mesh_path));
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}
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#else
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static void rtw_mpath_free_rcu_callback(rtw_rcu_head *head)
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{
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struct rtw_mesh_path *mpath;
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mpath = container_of(head, struct rtw_mesh_path, rcu);
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rtw_mfree(mpath, sizeof(struct rtw_mesh_path));
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}
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static void rtw_mpath_free_rcu(struct rtw_mesh_path *mpath)
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{
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call_rcu(&mpath->rcu, rtw_mpath_free_rcu_callback);
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}
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#endif
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#endif /* PLATFORM_LINUX */
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static void rtw_mesh_path_free_rcu(struct rtw_mesh_table *tbl, struct rtw_mesh_path *mpath);
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static u32 rtw_mesh_table_hash(const void *addr, u32 len, u32 seed)
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{
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/* Use last four bytes of hw addr as hash index */
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return jhash_1word(*(u32 *)(addr+2), seed);
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}
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static const rtw_rhashtable_params rtw_mesh_rht_params = {
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.nelem_hint = 2,
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.automatic_shrinking = true,
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.key_len = ETH_ALEN,
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.key_offset = offsetof(struct rtw_mesh_path, dst),
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.head_offset = offsetof(struct rtw_mesh_path, rhash),
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.hashfn = rtw_mesh_table_hash,
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};
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static inline bool rtw_mpath_expired(struct rtw_mesh_path *mpath)
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{
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return (mpath->flags & RTW_MESH_PATH_ACTIVE) &&
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rtw_time_after(rtw_get_current_time(), mpath->exp_time) &&
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!(mpath->flags & RTW_MESH_PATH_FIXED);
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}
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static void rtw_mesh_path_rht_free(void *ptr, void *tblptr)
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{
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struct rtw_mesh_path *mpath = ptr;
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struct rtw_mesh_table *tbl = tblptr;
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rtw_mesh_path_free_rcu(tbl, mpath);
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}
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static struct rtw_mesh_table *rtw_mesh_table_alloc(void)
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{
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struct rtw_mesh_table *newtbl;
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newtbl = rtw_malloc(sizeof(struct rtw_mesh_table));
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if (!newtbl)
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return NULL;
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rtw_hlist_head_init(&newtbl->known_gates);
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ATOMIC_SET(&newtbl->entries, 0);
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_rtw_spinlock_init(&newtbl->gates_lock);
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return newtbl;
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}
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static void rtw_mesh_table_free(struct rtw_mesh_table *tbl)
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{
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rtw_rhashtable_free_and_destroy(&tbl->rhead,
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rtw_mesh_path_rht_free, tbl);
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rtw_mfree(tbl, sizeof(struct rtw_mesh_table));
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}
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/**
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*
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* rtw_mesh_path_assign_nexthop - update mesh path next hop
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*
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* @mpath: mesh path to update
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* @sta: next hop to assign
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*
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* Locking: mpath->state_lock must be held when calling this function
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*/
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void rtw_mesh_path_assign_nexthop(struct rtw_mesh_path *mpath, struct sta_info *sta)
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{
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struct xmit_frame *xframe;
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_list *list, *head;
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rtw_rcu_assign_pointer(mpath->next_hop, sta);
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enter_critical_bh(&mpath->frame_queue.lock);
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head = &mpath->frame_queue.queue;
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list = get_next(head);
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while (rtw_end_of_queue_search(head, list) == _FALSE) {
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xframe = LIST_CONTAINOR(list, struct xmit_frame, list);
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list = get_next(list);
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_rtw_memcpy(xframe->attrib.ra, sta->cmn.mac_addr, ETH_ALEN);
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}
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exit_critical_bh(&mpath->frame_queue.lock);
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}
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static void rtw_prepare_for_gate(struct xmit_frame *xframe, char *dst_addr,
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struct rtw_mesh_path *gate_mpath)
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{
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struct pkt_attrib *attrib = &xframe->attrib;
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char *next_hop;
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if (attrib->mesh_frame_mode == MESH_UCAST_DATA)
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attrib->mesh_frame_mode = MESH_UCAST_PX_DATA;
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/* update next hop */
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rtw_rcu_read_lock();
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next_hop = rtw_rcu_dereference(gate_mpath->next_hop)->cmn.mac_addr;
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_rtw_memcpy(attrib->ra, next_hop, ETH_ALEN);
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rtw_rcu_read_unlock();
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_rtw_memcpy(attrib->mda, dst_addr, ETH_ALEN);
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}
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/**
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*
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* rtw_mesh_path_move_to_queue - Move or copy frames from one mpath queue to another
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*
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* This function is used to transfer or copy frames from an unresolved mpath to
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* a gate mpath. The function also adds the Address Extension field and
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* updates the next hop.
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*
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* If a frame already has an Address Extension field, only the next hop and
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* destination addresses are updated.
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*
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* The gate mpath must be an active mpath with a valid mpath->next_hop.
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*
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* @mpath: An active mpath the frames will be sent to (i.e. the gate)
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* @from_mpath: The failed mpath
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* @copy: When true, copy all the frames to the new mpath queue. When false,
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* move them.
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*/
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static void rtw_mesh_path_move_to_queue(struct rtw_mesh_path *gate_mpath,
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struct rtw_mesh_path *from_mpath,
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bool copy)
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{
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struct xmit_frame *fskb;
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_list *list, *head;
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_list failq;
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u32 failq_len;
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_irqL flags;
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if (rtw_warn_on(gate_mpath == from_mpath))
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return;
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if (rtw_warn_on(!gate_mpath->next_hop))
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return;
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_rtw_init_listhead(&failq);
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_enter_critical_bh(&from_mpath->frame_queue.lock, &flags);
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rtw_list_splice_init(&from_mpath->frame_queue.queue, &failq);
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failq_len = from_mpath->frame_queue_len;
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from_mpath->frame_queue_len = 0;
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_exit_critical_bh(&from_mpath->frame_queue.lock, &flags);
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head = &failq;
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list = get_next(head);
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while (rtw_end_of_queue_search(head, list) == _FALSE) {
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if (gate_mpath->frame_queue_len >= RTW_MESH_FRAME_QUEUE_LEN) {
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RTW_MPATH_DBG(FUNC_ADPT_FMT" mpath queue for gate %pM is full!\n"
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, FUNC_ADPT_ARG(gate_mpath->adapter), gate_mpath->dst);
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break;
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}
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fskb = LIST_CONTAINOR(list, struct xmit_frame, list);
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list = get_next(list);
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rtw_list_delete(&fskb->list);
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failq_len--;
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rtw_prepare_for_gate(fskb, gate_mpath->dst, gate_mpath);
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_enter_critical_bh(&gate_mpath->frame_queue.lock, &flags);
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rtw_list_insert_tail(&fskb->list, get_list_head(&gate_mpath->frame_queue));
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gate_mpath->frame_queue_len++;
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_exit_critical_bh(&gate_mpath->frame_queue.lock, &flags);
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#if 0 /* TODO: copy */
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skb = rtw_skb_copy(fskb);
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if (rtw_warn_on(!skb))
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break;
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rtw_prepare_for_gate(skb, gate_mpath->dst, gate_mpath);
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skb_queue_tail(&gate_mpath->frame_queue, skb);
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if (copy)
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continue;
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__skb_unlink(fskb, &failq);
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rtw_skb_free(fskb);
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#endif
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}
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RTW_MPATH_DBG(FUNC_ADPT_FMT" mpath queue for gate %pM has %d frames\n"
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, FUNC_ADPT_ARG(gate_mpath->adapter), gate_mpath->dst, gate_mpath->frame_queue_len);
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if (!copy)
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return;
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_enter_critical_bh(&from_mpath->frame_queue.lock, &flags);
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rtw_list_splice(&failq, &from_mpath->frame_queue.queue);
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from_mpath->frame_queue_len += failq_len;
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_exit_critical_bh(&from_mpath->frame_queue.lock, &flags);
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}
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static struct rtw_mesh_path *rtw_mpath_lookup(struct rtw_mesh_table *tbl, const u8 *dst)
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{
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struct rtw_mesh_path *mpath;
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if (!tbl)
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return NULL;
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mpath = rtw_rhashtable_lookup_fast(&tbl->rhead, dst, rtw_mesh_rht_params);
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if (mpath && rtw_mpath_expired(mpath)) {
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enter_critical_bh(&mpath->state_lock);
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mpath->flags &= ~RTW_MESH_PATH_ACTIVE;
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exit_critical_bh(&mpath->state_lock);
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}
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return mpath;
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}
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/**
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* rtw_mesh_path_lookup - look up a path in the mesh path table
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* @sdata: local subif
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* @dst: hardware address (ETH_ALEN length) of destination
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*
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* Returns: pointer to the mesh path structure, or NULL if not found
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*
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* Locking: must be called within a read rcu section.
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*/
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struct rtw_mesh_path *
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rtw_mesh_path_lookup(_adapter *adapter, const u8 *dst)
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{
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return rtw_mpath_lookup(adapter->mesh_info.mesh_paths, dst);
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}
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struct rtw_mesh_path *
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rtw_mpp_path_lookup(_adapter *adapter, const u8 *dst)
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{
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return rtw_mpath_lookup(adapter->mesh_info.mpp_paths, dst);
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}
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static struct rtw_mesh_path *
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__rtw_mesh_path_lookup_by_idx(struct rtw_mesh_table *tbl, int idx)
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{
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int i = 0, ret;
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struct rtw_mesh_path *mpath = NULL;
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rtw_rhashtable_iter iter;
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if (!tbl)
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return NULL;
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ret = rtw_rhashtable_walk_enter(&tbl->rhead, &iter);
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if (ret)
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return NULL;
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ret = rtw_rhashtable_walk_start(&iter);
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if (ret && ret != -EAGAIN)
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goto err;
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while ((mpath = rtw_rhashtable_walk_next(&iter))) {
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if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
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continue;
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if (IS_ERR(mpath))
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break;
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if (i++ == idx)
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break;
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}
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err:
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rtw_rhashtable_walk_stop(&iter);
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rtw_rhashtable_walk_exit(&iter);
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if (IS_ERR(mpath) || !mpath)
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return NULL;
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if (rtw_mpath_expired(mpath)) {
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enter_critical_bh(&mpath->state_lock);
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mpath->flags &= ~RTW_MESH_PATH_ACTIVE;
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exit_critical_bh(&mpath->state_lock);
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}
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return mpath;
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}
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/**
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* rtw_mesh_path_lookup_by_idx - look up a path in the mesh path table by its index
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* @idx: index
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* @sdata: local subif, or NULL for all entries
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*
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* Returns: pointer to the mesh path structure, or NULL if not found.
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*
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* Locking: must be called within a read rcu section.
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*/
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struct rtw_mesh_path *
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rtw_mesh_path_lookup_by_idx(_adapter *adapter, int idx)
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{
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return __rtw_mesh_path_lookup_by_idx(adapter->mesh_info.mesh_paths, idx);
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}
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/**
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* rtw_mpp_path_lookup_by_idx - look up a path in the proxy path table by its index
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* @idx: index
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* @sdata: local subif, or NULL for all entries
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*
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* Returns: pointer to the proxy path structure, or NULL if not found.
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*
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* Locking: must be called within a read rcu section.
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*/
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struct rtw_mesh_path *
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rtw_mpp_path_lookup_by_idx(_adapter *adapter, int idx)
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{
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return __rtw_mesh_path_lookup_by_idx(adapter->mesh_info.mpp_paths, idx);
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}
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/**
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* rtw_mesh_path_add_gate - add the given mpath to a mesh gate to our path table
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* @mpath: gate path to add to table
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*/
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int rtw_mesh_path_add_gate(struct rtw_mesh_path *mpath)
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{
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struct rtw_mesh_cfg *mcfg;
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struct rtw_mesh_info *minfo;
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struct rtw_mesh_table *tbl;
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int err, ori_num_gates;
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rtw_rcu_read_lock();
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tbl = mpath->adapter->mesh_info.mesh_paths;
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if (!tbl) {
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err = -ENOENT;
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goto err_rcu;
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}
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enter_critical_bh(&mpath->state_lock);
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mcfg = &mpath->adapter->mesh_cfg;
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mpath->gate_timeout = rtw_get_current_time() +
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rtw_ms_to_systime(mcfg->path_gate_timeout_factor *
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mpath->gate_ann_int);
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if (mpath->is_gate) {
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err = -EEXIST;
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exit_critical_bh(&mpath->state_lock);
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goto err_rcu;
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}
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minfo = &mpath->adapter->mesh_info;
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mpath->is_gate = true;
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_rtw_spinlock(&tbl->gates_lock);
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ori_num_gates = minfo->num_gates;
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minfo->num_gates++;
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rtw_hlist_add_head_rcu(&mpath->gate_list, &tbl->known_gates);
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_rtw_spinunlock(&tbl->gates_lock);
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exit_critical_bh(&mpath->state_lock);
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if (ori_num_gates == 0)
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update_beacon(mpath->adapter, WLAN_EID_MESH_CONFIG, NULL, _TRUE);
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RTW_MPATH_DBG(
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FUNC_ADPT_FMT" Mesh path: Recorded new gate: %pM. %d known gates\n",
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FUNC_ADPT_ARG(mpath->adapter),
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mpath->dst, mpath->adapter->mesh_info.num_gates);
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err = 0;
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err_rcu:
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rtw_rcu_read_unlock();
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return err;
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}
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/**
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* rtw_mesh_gate_del - remove a mesh gate from the list of known gates
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* @tbl: table which holds our list of known gates
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* @mpath: gate mpath
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*/
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void rtw_mesh_gate_del(struct rtw_mesh_table *tbl, struct rtw_mesh_path *mpath)
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{
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struct rtw_mesh_cfg *mcfg;
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struct rtw_mesh_info *minfo;
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int ori_num_gates;
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rtw_lockdep_assert_held(&mpath->state_lock);
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if (!mpath->is_gate)
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return;
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mcfg = &mpath->adapter->mesh_cfg;
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minfo = &mpath->adapter->mesh_info;
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mpath->is_gate = false;
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enter_critical_bh(&tbl->gates_lock);
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rtw_hlist_del_rcu(&mpath->gate_list);
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ori_num_gates = minfo->num_gates;
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minfo->num_gates--;
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exit_critical_bh(&tbl->gates_lock);
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if (ori_num_gates == 1)
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update_beacon(mpath->adapter, WLAN_EID_MESH_CONFIG, NULL, _TRUE);
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RTW_MPATH_DBG(
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FUNC_ADPT_FMT" Mesh path: Deleted gate: %pM. %d known gates\n",
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FUNC_ADPT_ARG(mpath->adapter),
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mpath->dst, mpath->adapter->mesh_info.num_gates);
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}
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/**
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* rtw_mesh_gate_search - search a mesh gate from the list of known gates
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* @tbl: table which holds our list of known gates
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* @addr: address of gate
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*/
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bool rtw_mesh_gate_search(struct rtw_mesh_table *tbl, const u8 *addr)
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{
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struct rtw_mesh_path *gate;
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rtw_hlist_node *node;
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bool exist = 0;
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rtw_rcu_read_lock();
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rtw_hlist_for_each_entry_rcu(gate, node, &tbl->known_gates, gate_list) {
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if (_rtw_memcmp(gate->dst, addr, ETH_ALEN) == _TRUE) {
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exist = 1;
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break;
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}
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}
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rtw_rcu_read_unlock();
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return exist;
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}
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|
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/**
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* rtw_mesh_gate_num - number of gates known to this interface
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* @sdata: subif data
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*/
|
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int rtw_mesh_gate_num(_adapter *adapter)
|
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{
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return adapter->mesh_info.num_gates;
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}
|
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|
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static
|
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struct rtw_mesh_path *rtw_mesh_path_new(_adapter *adapter,
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const u8 *dst)
|
|
{
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struct rtw_mesh_path *new_mpath;
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|
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new_mpath = rtw_zmalloc(sizeof(struct rtw_mesh_path));
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if (!new_mpath)
|
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return NULL;
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|
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_rtw_memcpy(new_mpath->dst, dst, ETH_ALEN);
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_rtw_memset(new_mpath->rann_snd_addr, 0xFF, ETH_ALEN);
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new_mpath->is_root = false;
|
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new_mpath->adapter = adapter;
|
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new_mpath->flags = 0;
|
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new_mpath->gate_asked = false;
|
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_rtw_init_queue(&new_mpath->frame_queue);
|
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new_mpath->frame_queue_len = 0;
|
|
new_mpath->exp_time = rtw_get_current_time();
|
|
_rtw_spinlock_init(&new_mpath->state_lock);
|
|
rtw_init_timer(&new_mpath->timer, adapter, rtw_mesh_path_timer, new_mpath);
|
|
|
|
return new_mpath;
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_add - allocate and add a new path to the mesh path table
|
|
* @dst: destination address of the path (ETH_ALEN length)
|
|
* @sdata: local subif
|
|
*
|
|
* Returns: 0 on success
|
|
*
|
|
* State: the initial state of the new path is set to 0
|
|
*/
|
|
struct rtw_mesh_path *rtw_mesh_path_add(_adapter *adapter,
|
|
const u8 *dst)
|
|
{
|
|
struct rtw_mesh_table *tbl = adapter->mesh_info.mesh_paths;
|
|
struct rtw_mesh_path *mpath, *new_mpath;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return ERR_PTR(-ENOTSUPP);
|
|
|
|
if (_rtw_memcmp(dst, adapter_mac_addr(adapter), ETH_ALEN) == _TRUE)
|
|
/* never add ourselves as neighbours */
|
|
return ERR_PTR(-ENOTSUPP);
|
|
|
|
if (is_multicast_mac_addr(dst))
|
|
return ERR_PTR(-ENOTSUPP);
|
|
|
|
if (ATOMIC_INC_UNLESS(&adapter->mesh_info.mpaths, RTW_MESH_MAX_MPATHS) == 0)
|
|
return ERR_PTR(-ENOSPC);
|
|
|
|
new_mpath = rtw_mesh_path_new(adapter, dst);
|
|
if (!new_mpath)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
do {
|
|
ret = rtw_rhashtable_lookup_insert_fast(&tbl->rhead,
|
|
&new_mpath->rhash,
|
|
rtw_mesh_rht_params);
|
|
|
|
if (ret == -EEXIST)
|
|
mpath = rtw_rhashtable_lookup_fast(&tbl->rhead,
|
|
dst,
|
|
rtw_mesh_rht_params);
|
|
|
|
} while (unlikely(ret == -EEXIST && !mpath));
|
|
|
|
if (ret && ret != -EEXIST)
|
|
return ERR_PTR(ret);
|
|
|
|
/* At this point either new_mpath was added, or we found a
|
|
* matching entry already in the table; in the latter case
|
|
* free the unnecessary new entry.
|
|
*/
|
|
if (ret == -EEXIST) {
|
|
rtw_mfree(new_mpath, sizeof(struct rtw_mesh_path));
|
|
new_mpath = mpath;
|
|
}
|
|
adapter->mesh_info.mesh_paths_generation++;
|
|
return new_mpath;
|
|
}
|
|
|
|
int rtw_mpp_path_add(_adapter *adapter,
|
|
const u8 *dst, const u8 *mpp)
|
|
{
|
|
struct rtw_mesh_table *tbl = adapter->mesh_info.mpp_paths;
|
|
struct rtw_mesh_path *new_mpath;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return -ENOTSUPP;
|
|
|
|
if (_rtw_memcmp(dst, adapter_mac_addr(adapter), ETH_ALEN) == _TRUE)
|
|
/* never add ourselves as neighbours */
|
|
return -ENOTSUPP;
|
|
|
|
if (is_multicast_mac_addr(dst))
|
|
return -ENOTSUPP;
|
|
|
|
new_mpath = rtw_mesh_path_new(adapter, dst);
|
|
|
|
if (!new_mpath)
|
|
return -ENOMEM;
|
|
|
|
_rtw_memcpy(new_mpath->mpp, mpp, ETH_ALEN);
|
|
ret = rtw_rhashtable_lookup_insert_fast(&tbl->rhead,
|
|
&new_mpath->rhash,
|
|
rtw_mesh_rht_params);
|
|
|
|
adapter->mesh_info.mpp_paths_generation++;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* rtw_mesh_plink_broken - deactivates paths and sends perr when a link breaks
|
|
*
|
|
* @sta: broken peer link
|
|
*
|
|
* This function must be called from the rate control algorithm if enough
|
|
* delivery errors suggest that a peer link is no longer usable.
|
|
*/
|
|
void rtw_mesh_plink_broken(struct sta_info *sta)
|
|
{
|
|
_adapter *adapter = sta->padapter;
|
|
struct rtw_mesh_table *tbl = adapter->mesh_info.mesh_paths;
|
|
static const u8 bcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
|
|
struct rtw_mesh_path *mpath;
|
|
rtw_rhashtable_iter iter;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_enter(&tbl->rhead, &iter);
|
|
if (ret)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_start(&iter);
|
|
if (ret && ret != -EAGAIN)
|
|
goto out;
|
|
|
|
while ((mpath = rtw_rhashtable_walk_next(&iter))) {
|
|
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
|
|
continue;
|
|
if (IS_ERR(mpath))
|
|
break;
|
|
if (rtw_rcu_access_pointer(mpath->next_hop) == sta &&
|
|
mpath->flags & RTW_MESH_PATH_ACTIVE &&
|
|
!(mpath->flags & RTW_MESH_PATH_FIXED)) {
|
|
enter_critical_bh(&mpath->state_lock);
|
|
mpath->flags &= ~RTW_MESH_PATH_ACTIVE;
|
|
++mpath->sn;
|
|
exit_critical_bh(&mpath->state_lock);
|
|
rtw_mesh_path_error_tx(adapter,
|
|
adapter->mesh_cfg.element_ttl,
|
|
mpath->dst, mpath->sn,
|
|
WLAN_REASON_MESH_PATH_DEST_UNREACHABLE, bcast);
|
|
}
|
|
}
|
|
out:
|
|
rtw_rhashtable_walk_stop(&iter);
|
|
rtw_rhashtable_walk_exit(&iter);
|
|
}
|
|
|
|
static void rtw_mesh_path_free_rcu(struct rtw_mesh_table *tbl,
|
|
struct rtw_mesh_path *mpath)
|
|
{
|
|
_adapter *adapter = mpath->adapter;
|
|
|
|
enter_critical_bh(&mpath->state_lock);
|
|
mpath->flags |= RTW_MESH_PATH_RESOLVING | RTW_MESH_PATH_DELETED;
|
|
rtw_mesh_gate_del(tbl, mpath);
|
|
exit_critical_bh(&mpath->state_lock);
|
|
_cancel_timer_ex(&mpath->timer);
|
|
ATOMIC_DEC(&adapter->mesh_info.mpaths);
|
|
ATOMIC_DEC(&tbl->entries);
|
|
_rtw_spinlock_free(&mpath->state_lock);
|
|
|
|
rtw_mesh_path_flush_pending(mpath);
|
|
|
|
rtw_mpath_free_rcu(mpath);
|
|
}
|
|
|
|
static void __rtw_mesh_path_del(struct rtw_mesh_table *tbl, struct rtw_mesh_path *mpath)
|
|
{
|
|
rtw_rhashtable_remove_fast(&tbl->rhead, &mpath->rhash, rtw_mesh_rht_params);
|
|
rtw_mesh_path_free_rcu(tbl, mpath);
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_flush_by_nexthop - Deletes mesh paths if their next hop matches
|
|
*
|
|
* @sta: mesh peer to match
|
|
*
|
|
* RCU notes: this function is called when a mesh plink transitions from
|
|
* PLINK_ESTAB to any other state, since PLINK_ESTAB state is the only one that
|
|
* allows path creation. This will happen before the sta can be freed (because
|
|
* sta_info_destroy() calls this) so any reader in a rcu read block will be
|
|
* protected against the plink disappearing.
|
|
*/
|
|
void rtw_mesh_path_flush_by_nexthop(struct sta_info *sta)
|
|
{
|
|
_adapter *adapter = sta->padapter;
|
|
struct rtw_mesh_table *tbl = adapter->mesh_info.mesh_paths;
|
|
struct rtw_mesh_path *mpath;
|
|
rtw_rhashtable_iter iter;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_enter(&tbl->rhead, &iter);
|
|
if (ret)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_start(&iter);
|
|
if (ret && ret != -EAGAIN)
|
|
goto out;
|
|
|
|
while ((mpath = rtw_rhashtable_walk_next(&iter))) {
|
|
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
|
|
continue;
|
|
if (IS_ERR(mpath))
|
|
break;
|
|
|
|
if (rtw_rcu_access_pointer(mpath->next_hop) == sta)
|
|
__rtw_mesh_path_del(tbl, mpath);
|
|
}
|
|
out:
|
|
rtw_rhashtable_walk_stop(&iter);
|
|
rtw_rhashtable_walk_exit(&iter);
|
|
}
|
|
|
|
static void rtw_mpp_flush_by_proxy(_adapter *adapter,
|
|
const u8 *proxy)
|
|
{
|
|
struct rtw_mesh_table *tbl = adapter->mesh_info.mpp_paths;
|
|
struct rtw_mesh_path *mpath;
|
|
rtw_rhashtable_iter iter;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_enter(&tbl->rhead, &iter);
|
|
if (ret)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_start(&iter);
|
|
if (ret && ret != -EAGAIN)
|
|
goto out;
|
|
|
|
while ((mpath = rtw_rhashtable_walk_next(&iter))) {
|
|
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
|
|
continue;
|
|
if (IS_ERR(mpath))
|
|
break;
|
|
|
|
if (_rtw_memcmp(mpath->mpp, proxy, ETH_ALEN) == _TRUE)
|
|
__rtw_mesh_path_del(tbl, mpath);
|
|
}
|
|
out:
|
|
rtw_rhashtable_walk_stop(&iter);
|
|
rtw_rhashtable_walk_exit(&iter);
|
|
}
|
|
|
|
static void rtw_table_flush_by_iface(struct rtw_mesh_table *tbl)
|
|
{
|
|
struct rtw_mesh_path *mpath;
|
|
rtw_rhashtable_iter iter;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_enter(&tbl->rhead, &iter);
|
|
if (ret)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_start(&iter);
|
|
if (ret && ret != -EAGAIN)
|
|
goto out;
|
|
|
|
while ((mpath = rtw_rhashtable_walk_next(&iter))) {
|
|
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
|
|
continue;
|
|
if (IS_ERR(mpath))
|
|
break;
|
|
__rtw_mesh_path_del(tbl, mpath);
|
|
}
|
|
out:
|
|
rtw_rhashtable_walk_stop(&iter);
|
|
rtw_rhashtable_walk_exit(&iter);
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_flush_by_iface - Deletes all mesh paths associated with a given iface
|
|
*
|
|
* This function deletes both mesh paths as well as mesh portal paths.
|
|
*
|
|
* @sdata: interface data to match
|
|
*
|
|
*/
|
|
void rtw_mesh_path_flush_by_iface(_adapter *adapter)
|
|
{
|
|
rtw_table_flush_by_iface(adapter->mesh_info.mesh_paths);
|
|
rtw_table_flush_by_iface(adapter->mesh_info.mpp_paths);
|
|
}
|
|
|
|
/**
|
|
* rtw_table_path_del - delete a path from the mesh or mpp table
|
|
*
|
|
* @tbl: mesh or mpp path table
|
|
* @sdata: local subif
|
|
* @addr: dst address (ETH_ALEN length)
|
|
*
|
|
* Returns: 0 if successful
|
|
*/
|
|
static int rtw_table_path_del(struct rtw_mesh_table *tbl,
|
|
const u8 *addr)
|
|
{
|
|
struct rtw_mesh_path *mpath;
|
|
|
|
if (!tbl)
|
|
return -ENXIO;
|
|
|
|
rtw_rcu_read_lock();
|
|
mpath = rtw_rhashtable_lookup_fast(&tbl->rhead, addr, rtw_mesh_rht_params);
|
|
if (!mpath) {
|
|
rtw_rcu_read_unlock();
|
|
return -ENXIO;
|
|
}
|
|
|
|
__rtw_mesh_path_del(tbl, mpath);
|
|
rtw_rcu_read_unlock();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* rtw_mesh_path_del - delete a mesh path from the table
|
|
*
|
|
* @addr: dst address (ETH_ALEN length)
|
|
* @sdata: local subif
|
|
*
|
|
* Returns: 0 if successful
|
|
*/
|
|
int rtw_mesh_path_del(_adapter *adapter, const u8 *addr)
|
|
{
|
|
int err;
|
|
|
|
/* flush relevant mpp entries first */
|
|
rtw_mpp_flush_by_proxy(adapter, addr);
|
|
|
|
err = rtw_table_path_del(adapter->mesh_info.mesh_paths, addr);
|
|
adapter->mesh_info.mesh_paths_generation++;
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_tx_pending - sends pending frames in a mesh path queue
|
|
*
|
|
* @mpath: mesh path to activate
|
|
*
|
|
* Locking: the state_lock of the mpath structure must NOT be held when calling
|
|
* this function.
|
|
*/
|
|
void rtw_mesh_path_tx_pending(struct rtw_mesh_path *mpath)
|
|
{
|
|
if (mpath->flags & RTW_MESH_PATH_ACTIVE) {
|
|
struct rtw_mesh_info *minfo = &mpath->adapter->mesh_info;
|
|
_list q;
|
|
u32 q_len = 0;
|
|
|
|
_rtw_init_listhead(&q);
|
|
|
|
/* move to local queue */
|
|
enter_critical_bh(&mpath->frame_queue.lock);
|
|
if (mpath->frame_queue_len) {
|
|
rtw_list_splice_init(&mpath->frame_queue.queue, &q);
|
|
q_len = mpath->frame_queue_len;
|
|
mpath->frame_queue_len = 0;
|
|
}
|
|
exit_critical_bh(&mpath->frame_queue.lock);
|
|
|
|
if (q_len) {
|
|
/* move to mpath_tx_queue */
|
|
enter_critical_bh(&minfo->mpath_tx_queue.lock);
|
|
rtw_list_splice_tail(&q, &minfo->mpath_tx_queue.queue);
|
|
minfo->mpath_tx_queue_len += q_len;
|
|
exit_critical_bh(&minfo->mpath_tx_queue.lock);
|
|
|
|
/* schedule mpath_tx_tasklet */
|
|
tasklet_hi_schedule(&minfo->mpath_tx_tasklet);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_send_to_gates - sends pending frames to all known mesh gates
|
|
*
|
|
* @mpath: mesh path whose queue will be emptied
|
|
*
|
|
* If there is only one gate, the frames are transferred from the failed mpath
|
|
* queue to that gate's queue. If there are more than one gates, the frames
|
|
* are copied from each gate to the next. After frames are copied, the
|
|
* mpath queues are emptied onto the transmission queue.
|
|
*/
|
|
int rtw_mesh_path_send_to_gates(struct rtw_mesh_path *mpath)
|
|
{
|
|
_adapter *adapter = mpath->adapter;
|
|
struct rtw_mesh_table *tbl;
|
|
struct rtw_mesh_path *from_mpath = mpath;
|
|
struct rtw_mesh_path *gate;
|
|
bool copy = false;
|
|
rtw_hlist_node *node;
|
|
|
|
tbl = adapter->mesh_info.mesh_paths;
|
|
if (!tbl)
|
|
return 0;
|
|
|
|
rtw_rcu_read_lock();
|
|
rtw_hlist_for_each_entry_rcu(gate, node, &tbl->known_gates, gate_list) {
|
|
if (gate->flags & RTW_MESH_PATH_ACTIVE) {
|
|
RTW_MPATH_DBG(FUNC_ADPT_FMT" Forwarding to %pM\n",
|
|
FUNC_ADPT_ARG(adapter), gate->dst);
|
|
rtw_mesh_path_move_to_queue(gate, from_mpath, copy);
|
|
from_mpath = gate;
|
|
copy = true;
|
|
} else {
|
|
RTW_MPATH_DBG(
|
|
FUNC_ADPT_FMT" Not forwarding to %pM (flags %#x)\n",
|
|
FUNC_ADPT_ARG(adapter), gate->dst, gate->flags);
|
|
}
|
|
}
|
|
|
|
rtw_hlist_for_each_entry_rcu(gate, node, &tbl->known_gates, gate_list) {
|
|
RTW_MPATH_DBG(FUNC_ADPT_FMT" Sending to %pM\n",
|
|
FUNC_ADPT_ARG(adapter), gate->dst);
|
|
rtw_mesh_path_tx_pending(gate);
|
|
}
|
|
rtw_rcu_read_unlock();
|
|
|
|
return (from_mpath == mpath) ? -EHOSTUNREACH : 0;
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_discard_frame - discard a frame whose path could not be resolved
|
|
*
|
|
* @skb: frame to discard
|
|
* @sdata: network subif the frame was to be sent through
|
|
*
|
|
* Locking: the function must me called within a rcu_read_lock region
|
|
*/
|
|
void rtw_mesh_path_discard_frame(_adapter *adapter,
|
|
struct xmit_frame *xframe)
|
|
{
|
|
rtw_free_xmitframe(&adapter->xmitpriv, xframe);
|
|
adapter->mesh_info.mshstats.dropped_frames_no_route++;
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_flush_pending - free the pending queue of a mesh path
|
|
*
|
|
* @mpath: mesh path whose queue has to be freed
|
|
*
|
|
* Locking: the function must me called within a rcu_read_lock region
|
|
*/
|
|
void rtw_mesh_path_flush_pending(struct rtw_mesh_path *mpath)
|
|
{
|
|
struct xmit_frame *xframe;
|
|
_list *list, *head;
|
|
_list tmp;
|
|
|
|
_rtw_init_listhead(&tmp);
|
|
|
|
enter_critical_bh(&mpath->frame_queue.lock);
|
|
rtw_list_splice_init(&mpath->frame_queue.queue, &tmp);
|
|
mpath->frame_queue_len = 0;
|
|
exit_critical_bh(&mpath->frame_queue.lock);
|
|
|
|
head = &tmp;
|
|
list = get_next(head);
|
|
while (rtw_end_of_queue_search(head, list) == _FALSE) {
|
|
xframe = LIST_CONTAINOR(list, struct xmit_frame, list);
|
|
list = get_next(list);
|
|
rtw_list_delete(&xframe->list);
|
|
rtw_mesh_path_discard_frame(mpath->adapter, xframe);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* rtw_mesh_path_fix_nexthop - force a specific next hop for a mesh path
|
|
*
|
|
* @mpath: the mesh path to modify
|
|
* @next_hop: the next hop to force
|
|
*
|
|
* Locking: this function must be called holding mpath->state_lock
|
|
*/
|
|
void rtw_mesh_path_fix_nexthop(struct rtw_mesh_path *mpath, struct sta_info *next_hop)
|
|
{
|
|
enter_critical_bh(&mpath->state_lock);
|
|
rtw_mesh_path_assign_nexthop(mpath, next_hop);
|
|
mpath->sn = 0xffff;
|
|
mpath->metric = 0;
|
|
mpath->hop_count = 0;
|
|
mpath->exp_time = 0;
|
|
mpath->flags = RTW_MESH_PATH_FIXED | RTW_MESH_PATH_SN_VALID;
|
|
rtw_mesh_path_activate(mpath);
|
|
exit_critical_bh(&mpath->state_lock);
|
|
rtw_ewma_err_rate_init(&next_hop->metrics.err_rate);
|
|
/* init it at a low value - 0 start is tricky */
|
|
rtw_ewma_err_rate_add(&next_hop->metrics.err_rate, 1);
|
|
rtw_mesh_path_tx_pending(mpath);
|
|
}
|
|
|
|
int rtw_mesh_pathtbl_init(_adapter *adapter)
|
|
{
|
|
struct rtw_mesh_table *tbl_path, *tbl_mpp;
|
|
int ret;
|
|
|
|
tbl_path = rtw_mesh_table_alloc();
|
|
if (!tbl_path)
|
|
return -ENOMEM;
|
|
|
|
tbl_mpp = rtw_mesh_table_alloc();
|
|
if (!tbl_mpp) {
|
|
ret = -ENOMEM;
|
|
goto free_path;
|
|
}
|
|
|
|
rtw_rhashtable_init(&tbl_path->rhead, &rtw_mesh_rht_params);
|
|
rtw_rhashtable_init(&tbl_mpp->rhead, &rtw_mesh_rht_params);
|
|
|
|
adapter->mesh_info.mesh_paths = tbl_path;
|
|
adapter->mesh_info.mpp_paths = tbl_mpp;
|
|
|
|
return 0;
|
|
|
|
free_path:
|
|
rtw_mesh_table_free(tbl_path);
|
|
return ret;
|
|
}
|
|
|
|
static
|
|
void rtw_mesh_path_tbl_expire(_adapter *adapter,
|
|
struct rtw_mesh_table *tbl)
|
|
{
|
|
struct rtw_mesh_path *mpath;
|
|
rtw_rhashtable_iter iter;
|
|
int ret;
|
|
|
|
if (!tbl)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_enter(&tbl->rhead, &iter);
|
|
if (ret)
|
|
return;
|
|
|
|
ret = rtw_rhashtable_walk_start(&iter);
|
|
if (ret && ret != -EAGAIN)
|
|
goto out;
|
|
|
|
while ((mpath = rtw_rhashtable_walk_next(&iter))) {
|
|
if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
|
|
continue;
|
|
if (IS_ERR(mpath))
|
|
break;
|
|
if ((!(mpath->flags & RTW_MESH_PATH_RESOLVING)) &&
|
|
(!(mpath->flags & RTW_MESH_PATH_FIXED)) &&
|
|
rtw_time_after(rtw_get_current_time(), mpath->exp_time + RTW_MESH_PATH_EXPIRE))
|
|
__rtw_mesh_path_del(tbl, mpath);
|
|
|
|
if (mpath->is_gate && /* need not to deal with non-gate case */
|
|
rtw_time_after(rtw_get_current_time(), mpath->gate_timeout)) {
|
|
RTW_MPATH_DBG(FUNC_ADPT_FMT"mpath [%pM] expired systime is %lu systime is %lu\n",
|
|
FUNC_ADPT_ARG(adapter), mpath->dst,
|
|
mpath->gate_timeout, rtw_get_current_time());
|
|
enter_critical_bh(&mpath->state_lock);
|
|
if (mpath->gate_asked) { /* asked gate before */
|
|
rtw_mesh_gate_del(tbl, mpath);
|
|
exit_critical_bh(&mpath->state_lock);
|
|
} else {
|
|
mpath->gate_asked = true;
|
|
mpath->gate_timeout = rtw_get_current_time() + rtw_ms_to_systime(mpath->gate_ann_int);
|
|
exit_critical_bh(&mpath->state_lock);
|
|
rtw_mesh_queue_preq(mpath, RTW_PREQ_Q_F_START | RTW_PREQ_Q_F_REFRESH);
|
|
RTW_MPATH_DBG(FUNC_ADPT_FMT"mpath [%pM] ask mesh gate existence (is_root=%d)\n",
|
|
FUNC_ADPT_ARG(adapter), mpath->dst, mpath->is_root);
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
rtw_rhashtable_walk_stop(&iter);
|
|
rtw_rhashtable_walk_exit(&iter);
|
|
}
|
|
|
|
void rtw_mesh_path_expire(_adapter *adapter)
|
|
{
|
|
rtw_mesh_path_tbl_expire(adapter, adapter->mesh_info.mesh_paths);
|
|
rtw_mesh_path_tbl_expire(adapter, adapter->mesh_info.mpp_paths);
|
|
}
|
|
|
|
void rtw_mesh_pathtbl_unregister(_adapter *adapter)
|
|
{
|
|
if (adapter->mesh_info.mesh_paths) {
|
|
rtw_mesh_table_free(adapter->mesh_info.mesh_paths);
|
|
adapter->mesh_info.mesh_paths = NULL;
|
|
}
|
|
|
|
if (adapter->mesh_info.mpp_paths) {
|
|
rtw_mesh_table_free(adapter->mesh_info.mpp_paths);
|
|
adapter->mesh_info.mpp_paths = NULL;
|
|
}
|
|
}
|
|
#endif /* CONFIG_RTW_MESH */
|
|
|