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0cee6bbe06
We remove a number of unnecessary variables and branches in TIPC. This patch is cosmetic and does not change the operation of TIPC in any way. Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Wang Weidong <wangweidong1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
963 lines
25 KiB
C
963 lines
25 KiB
C
/*
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* net/tipc/name_table.c: TIPC name table code
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2004-2008, 2010-2011, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "core.h"
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#include "config.h"
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#include "name_table.h"
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#include "name_distr.h"
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#include "subscr.h"
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#include "port.h"
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#define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */
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/**
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* struct name_info - name sequence publication info
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* @node_list: circular list of publications made by own node
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* @cluster_list: circular list of publications made by own cluster
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* @zone_list: circular list of publications made by own zone
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* @node_list_size: number of entries in "node_list"
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* @cluster_list_size: number of entries in "cluster_list"
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* @zone_list_size: number of entries in "zone_list"
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*
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* Note: The zone list always contains at least one entry, since all
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* publications of the associated name sequence belong to it.
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* (The cluster and node lists may be empty.)
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*/
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struct name_info {
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struct list_head node_list;
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struct list_head cluster_list;
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struct list_head zone_list;
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u32 node_list_size;
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u32 cluster_list_size;
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u32 zone_list_size;
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};
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/**
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* struct sub_seq - container for all published instances of a name sequence
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* @lower: name sequence lower bound
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* @upper: name sequence upper bound
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* @info: pointer to name sequence publication info
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*/
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struct sub_seq {
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u32 lower;
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u32 upper;
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struct name_info *info;
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};
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/**
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* struct name_seq - container for all published instances of a name type
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* @type: 32 bit 'type' value for name sequence
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* @sseq: pointer to dynamically-sized array of sub-sequences of this 'type';
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* sub-sequences are sorted in ascending order
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* @alloc: number of sub-sequences currently in array
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* @first_free: array index of first unused sub-sequence entry
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* @ns_list: links to adjacent name sequences in hash chain
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* @subscriptions: list of subscriptions for this 'type'
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* @lock: spinlock controlling access to publication lists of all sub-sequences
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*/
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struct name_seq {
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u32 type;
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struct sub_seq *sseqs;
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u32 alloc;
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u32 first_free;
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struct hlist_node ns_list;
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struct list_head subscriptions;
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spinlock_t lock;
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};
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/**
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* struct name_table - table containing all existing port name publications
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* @types: pointer to fixed-sized array of name sequence lists,
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* accessed via hashing on 'type'; name sequence lists are *not* sorted
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* @local_publ_count: number of publications issued by this node
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*/
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struct name_table {
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struct hlist_head *types;
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u32 local_publ_count;
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};
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static struct name_table table;
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DEFINE_RWLOCK(tipc_nametbl_lock);
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static int hash(int x)
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{
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return x & (TIPC_NAMETBL_SIZE - 1);
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}
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/**
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* publ_create - create a publication structure
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*/
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static struct publication *publ_create(u32 type, u32 lower, u32 upper,
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u32 scope, u32 node, u32 port_ref,
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u32 key)
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{
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struct publication *publ = kzalloc(sizeof(*publ), GFP_ATOMIC);
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if (publ == NULL) {
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pr_warn("Publication creation failure, no memory\n");
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return NULL;
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}
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publ->type = type;
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publ->lower = lower;
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publ->upper = upper;
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publ->scope = scope;
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publ->node = node;
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publ->ref = port_ref;
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publ->key = key;
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INIT_LIST_HEAD(&publ->local_list);
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INIT_LIST_HEAD(&publ->pport_list);
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INIT_LIST_HEAD(&publ->subscr.nodesub_list);
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return publ;
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}
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/**
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* tipc_subseq_alloc - allocate a specified number of sub-sequence structures
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*/
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static struct sub_seq *tipc_subseq_alloc(u32 cnt)
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{
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return kcalloc(cnt, sizeof(struct sub_seq), GFP_ATOMIC);
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}
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/**
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* tipc_nameseq_create - create a name sequence structure for the specified 'type'
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*
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* Allocates a single sub-sequence structure and sets it to all 0's.
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*/
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static struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head)
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{
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struct name_seq *nseq = kzalloc(sizeof(*nseq), GFP_ATOMIC);
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struct sub_seq *sseq = tipc_subseq_alloc(1);
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if (!nseq || !sseq) {
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pr_warn("Name sequence creation failed, no memory\n");
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kfree(nseq);
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kfree(sseq);
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return NULL;
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}
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spin_lock_init(&nseq->lock);
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nseq->type = type;
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nseq->sseqs = sseq;
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nseq->alloc = 1;
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INIT_HLIST_NODE(&nseq->ns_list);
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INIT_LIST_HEAD(&nseq->subscriptions);
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hlist_add_head(&nseq->ns_list, seq_head);
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return nseq;
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}
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/*
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* nameseq_delete_empty - deletes a name sequence structure if now unused
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*/
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static void nameseq_delete_empty(struct name_seq *seq)
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{
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if (!seq->first_free && list_empty(&seq->subscriptions)) {
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hlist_del_init(&seq->ns_list);
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kfree(seq->sseqs);
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kfree(seq);
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}
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}
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/**
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* nameseq_find_subseq - find sub-sequence (if any) matching a name instance
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*
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* Very time-critical, so binary searches through sub-sequence array.
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*/
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static struct sub_seq *nameseq_find_subseq(struct name_seq *nseq,
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u32 instance)
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{
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struct sub_seq *sseqs = nseq->sseqs;
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int low = 0;
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int high = nseq->first_free - 1;
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int mid;
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while (low <= high) {
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mid = (low + high) / 2;
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if (instance < sseqs[mid].lower)
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high = mid - 1;
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else if (instance > sseqs[mid].upper)
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low = mid + 1;
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else
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return &sseqs[mid];
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}
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return NULL;
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}
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/**
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* nameseq_locate_subseq - determine position of name instance in sub-sequence
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*
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* Returns index in sub-sequence array of the entry that contains the specified
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* instance value; if no entry contains that value, returns the position
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* where a new entry for it would be inserted in the array.
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*
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* Note: Similar to binary search code for locating a sub-sequence.
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*/
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static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance)
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{
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struct sub_seq *sseqs = nseq->sseqs;
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int low = 0;
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int high = nseq->first_free - 1;
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int mid;
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while (low <= high) {
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mid = (low + high) / 2;
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if (instance < sseqs[mid].lower)
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high = mid - 1;
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else if (instance > sseqs[mid].upper)
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low = mid + 1;
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else
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return mid;
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}
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return low;
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}
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/**
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* tipc_nameseq_insert_publ
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*/
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static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
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u32 type, u32 lower, u32 upper,
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u32 scope, u32 node, u32 port, u32 key)
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{
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struct tipc_subscription *s;
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struct tipc_subscription *st;
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struct publication *publ;
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struct sub_seq *sseq;
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struct name_info *info;
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int created_subseq = 0;
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sseq = nameseq_find_subseq(nseq, lower);
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if (sseq) {
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/* Lower end overlaps existing entry => need an exact match */
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if ((sseq->lower != lower) || (sseq->upper != upper)) {
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pr_warn("Cannot publish {%u,%u,%u}, overlap error\n",
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type, lower, upper);
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return NULL;
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}
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info = sseq->info;
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/* Check if an identical publication already exists */
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list_for_each_entry(publ, &info->zone_list, zone_list) {
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if ((publ->ref == port) && (publ->key == key) &&
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(!publ->node || (publ->node == node)))
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return NULL;
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}
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} else {
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u32 inspos;
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struct sub_seq *freesseq;
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/* Find where lower end should be inserted */
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inspos = nameseq_locate_subseq(nseq, lower);
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/* Fail if upper end overlaps into an existing entry */
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if ((inspos < nseq->first_free) &&
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(upper >= nseq->sseqs[inspos].lower)) {
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pr_warn("Cannot publish {%u,%u,%u}, overlap error\n",
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type, lower, upper);
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return NULL;
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}
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/* Ensure there is space for new sub-sequence */
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if (nseq->first_free == nseq->alloc) {
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struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2);
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if (!sseqs) {
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pr_warn("Cannot publish {%u,%u,%u}, no memory\n",
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type, lower, upper);
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return NULL;
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}
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memcpy(sseqs, nseq->sseqs,
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nseq->alloc * sizeof(struct sub_seq));
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kfree(nseq->sseqs);
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nseq->sseqs = sseqs;
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nseq->alloc *= 2;
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}
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info = kzalloc(sizeof(*info), GFP_ATOMIC);
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if (!info) {
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pr_warn("Cannot publish {%u,%u,%u}, no memory\n",
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type, lower, upper);
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return NULL;
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}
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INIT_LIST_HEAD(&info->node_list);
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INIT_LIST_HEAD(&info->cluster_list);
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INIT_LIST_HEAD(&info->zone_list);
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/* Insert new sub-sequence */
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sseq = &nseq->sseqs[inspos];
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freesseq = &nseq->sseqs[nseq->first_free];
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memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof(*sseq));
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memset(sseq, 0, sizeof(*sseq));
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nseq->first_free++;
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sseq->lower = lower;
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sseq->upper = upper;
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sseq->info = info;
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created_subseq = 1;
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}
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/* Insert a publication */
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publ = publ_create(type, lower, upper, scope, node, port, key);
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if (!publ)
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return NULL;
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list_add(&publ->zone_list, &info->zone_list);
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info->zone_list_size++;
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if (in_own_cluster(node)) {
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list_add(&publ->cluster_list, &info->cluster_list);
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info->cluster_list_size++;
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}
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if (in_own_node(node)) {
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list_add(&publ->node_list, &info->node_list);
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info->node_list_size++;
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}
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/* Any subscriptions waiting for notification? */
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list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
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tipc_subscr_report_overlap(s,
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publ->lower,
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publ->upper,
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TIPC_PUBLISHED,
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publ->ref,
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publ->node,
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created_subseq);
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}
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return publ;
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}
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/**
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* tipc_nameseq_remove_publ
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*
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* NOTE: There may be cases where TIPC is asked to remove a publication
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* that is not in the name table. For example, if another node issues a
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* publication for a name sequence that overlaps an existing name sequence
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* the publication will not be recorded, which means the publication won't
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* be found when the name sequence is later withdrawn by that node.
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* A failed withdraw request simply returns a failure indication and lets the
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* caller issue any error or warning messages associated with such a problem.
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*/
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static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
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u32 node, u32 ref, u32 key)
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{
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struct publication *publ;
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struct sub_seq *sseq = nameseq_find_subseq(nseq, inst);
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struct name_info *info;
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struct sub_seq *free;
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struct tipc_subscription *s, *st;
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int removed_subseq = 0;
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if (!sseq)
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return NULL;
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info = sseq->info;
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/* Locate publication, if it exists */
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list_for_each_entry(publ, &info->zone_list, zone_list) {
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if ((publ->key == key) && (publ->ref == ref) &&
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(!publ->node || (publ->node == node)))
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goto found;
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}
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return NULL;
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found:
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/* Remove publication from zone scope list */
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list_del(&publ->zone_list);
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info->zone_list_size--;
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/* Remove publication from cluster scope list, if present */
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if (in_own_cluster(node)) {
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list_del(&publ->cluster_list);
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info->cluster_list_size--;
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}
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/* Remove publication from node scope list, if present */
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if (in_own_node(node)) {
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list_del(&publ->node_list);
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info->node_list_size--;
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}
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/* Contract subseq list if no more publications for that subseq */
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if (list_empty(&info->zone_list)) {
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kfree(info);
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free = &nseq->sseqs[nseq->first_free--];
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memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof(*sseq));
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removed_subseq = 1;
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}
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/* Notify any waiting subscriptions */
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list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
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tipc_subscr_report_overlap(s,
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publ->lower,
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publ->upper,
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TIPC_WITHDRAWN,
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publ->ref,
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publ->node,
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removed_subseq);
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}
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return publ;
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}
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/**
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* tipc_nameseq_subscribe - attach a subscription, and issue
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* the prescribed number of events if there is any sub-
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* sequence overlapping with the requested sequence
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*/
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static void tipc_nameseq_subscribe(struct name_seq *nseq,
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struct tipc_subscription *s)
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{
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struct sub_seq *sseq = nseq->sseqs;
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list_add(&s->nameseq_list, &nseq->subscriptions);
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if (!sseq)
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return;
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while (sseq != &nseq->sseqs[nseq->first_free]) {
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if (tipc_subscr_overlap(s, sseq->lower, sseq->upper)) {
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struct publication *crs;
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struct name_info *info = sseq->info;
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int must_report = 1;
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list_for_each_entry(crs, &info->zone_list, zone_list) {
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tipc_subscr_report_overlap(s,
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sseq->lower,
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sseq->upper,
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TIPC_PUBLISHED,
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crs->ref,
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crs->node,
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must_report);
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must_report = 0;
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}
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}
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sseq++;
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}
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}
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static struct name_seq *nametbl_find_seq(u32 type)
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{
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struct hlist_head *seq_head;
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struct name_seq *ns;
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seq_head = &table.types[hash(type)];
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hlist_for_each_entry(ns, seq_head, ns_list) {
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if (ns->type == type)
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return ns;
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}
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return NULL;
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};
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struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
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u32 scope, u32 node, u32 port, u32 key)
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{
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struct name_seq *seq = nametbl_find_seq(type);
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if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE) ||
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(lower > upper)) {
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pr_debug("Failed to publish illegal {%u,%u,%u} with scope %u\n",
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type, lower, upper, scope);
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return NULL;
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}
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if (!seq)
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seq = tipc_nameseq_create(type, &table.types[hash(type)]);
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if (!seq)
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return NULL;
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return tipc_nameseq_insert_publ(seq, type, lower, upper,
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scope, node, port, key);
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}
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struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
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u32 node, u32 ref, u32 key)
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{
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struct publication *publ;
|
|
struct name_seq *seq = nametbl_find_seq(type);
|
|
|
|
if (!seq)
|
|
return NULL;
|
|
|
|
publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
|
|
nameseq_delete_empty(seq);
|
|
return publ;
|
|
}
|
|
|
|
/**
|
|
* tipc_nametbl_translate - perform name translation
|
|
*
|
|
* On entry, 'destnode' is the search domain used during translation.
|
|
*
|
|
* On exit:
|
|
* - if name translation is deferred to another node/cluster/zone,
|
|
* leaves 'destnode' unchanged (will be non-zero) and returns 0
|
|
* - if name translation is attempted and succeeds, sets 'destnode'
|
|
* to publishing node and returns port reference (will be non-zero)
|
|
* - if name translation is attempted and fails, sets 'destnode' to 0
|
|
* and returns 0
|
|
*/
|
|
u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
|
|
{
|
|
struct sub_seq *sseq;
|
|
struct name_info *info;
|
|
struct publication *publ;
|
|
struct name_seq *seq;
|
|
u32 ref = 0;
|
|
u32 node = 0;
|
|
|
|
if (!tipc_in_scope(*destnode, tipc_own_addr))
|
|
return 0;
|
|
|
|
read_lock_bh(&tipc_nametbl_lock);
|
|
seq = nametbl_find_seq(type);
|
|
if (unlikely(!seq))
|
|
goto not_found;
|
|
sseq = nameseq_find_subseq(seq, instance);
|
|
if (unlikely(!sseq))
|
|
goto not_found;
|
|
spin_lock_bh(&seq->lock);
|
|
info = sseq->info;
|
|
|
|
/* Closest-First Algorithm */
|
|
if (likely(!*destnode)) {
|
|
if (!list_empty(&info->node_list)) {
|
|
publ = list_first_entry(&info->node_list,
|
|
struct publication,
|
|
node_list);
|
|
list_move_tail(&publ->node_list,
|
|
&info->node_list);
|
|
} else if (!list_empty(&info->cluster_list)) {
|
|
publ = list_first_entry(&info->cluster_list,
|
|
struct publication,
|
|
cluster_list);
|
|
list_move_tail(&publ->cluster_list,
|
|
&info->cluster_list);
|
|
} else {
|
|
publ = list_first_entry(&info->zone_list,
|
|
struct publication,
|
|
zone_list);
|
|
list_move_tail(&publ->zone_list,
|
|
&info->zone_list);
|
|
}
|
|
}
|
|
|
|
/* Round-Robin Algorithm */
|
|
else if (*destnode == tipc_own_addr) {
|
|
if (list_empty(&info->node_list))
|
|
goto no_match;
|
|
publ = list_first_entry(&info->node_list, struct publication,
|
|
node_list);
|
|
list_move_tail(&publ->node_list, &info->node_list);
|
|
} else if (in_own_cluster_exact(*destnode)) {
|
|
if (list_empty(&info->cluster_list))
|
|
goto no_match;
|
|
publ = list_first_entry(&info->cluster_list, struct publication,
|
|
cluster_list);
|
|
list_move_tail(&publ->cluster_list, &info->cluster_list);
|
|
} else {
|
|
publ = list_first_entry(&info->zone_list, struct publication,
|
|
zone_list);
|
|
list_move_tail(&publ->zone_list, &info->zone_list);
|
|
}
|
|
|
|
ref = publ->ref;
|
|
node = publ->node;
|
|
no_match:
|
|
spin_unlock_bh(&seq->lock);
|
|
not_found:
|
|
read_unlock_bh(&tipc_nametbl_lock);
|
|
*destnode = node;
|
|
return ref;
|
|
}
|
|
|
|
/**
|
|
* tipc_nametbl_mc_translate - find multicast destinations
|
|
*
|
|
* Creates list of all local ports that overlap the given multicast address;
|
|
* also determines if any off-node ports overlap.
|
|
*
|
|
* Note: Publications with a scope narrower than 'limit' are ignored.
|
|
* (i.e. local node-scope publications mustn't receive messages arriving
|
|
* from another node, even if the multcast link brought it here)
|
|
*
|
|
* Returns non-zero if any off-node ports overlap
|
|
*/
|
|
int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,
|
|
struct tipc_port_list *dports)
|
|
{
|
|
struct name_seq *seq;
|
|
struct sub_seq *sseq;
|
|
struct sub_seq *sseq_stop;
|
|
struct name_info *info;
|
|
int res = 0;
|
|
|
|
read_lock_bh(&tipc_nametbl_lock);
|
|
seq = nametbl_find_seq(type);
|
|
if (!seq)
|
|
goto exit;
|
|
|
|
spin_lock_bh(&seq->lock);
|
|
|
|
sseq = seq->sseqs + nameseq_locate_subseq(seq, lower);
|
|
sseq_stop = seq->sseqs + seq->first_free;
|
|
for (; sseq != sseq_stop; sseq++) {
|
|
struct publication *publ;
|
|
|
|
if (sseq->lower > upper)
|
|
break;
|
|
|
|
info = sseq->info;
|
|
list_for_each_entry(publ, &info->node_list, node_list) {
|
|
if (publ->scope <= limit)
|
|
tipc_port_list_add(dports, publ->ref);
|
|
}
|
|
|
|
if (info->cluster_list_size != info->node_list_size)
|
|
res = 1;
|
|
}
|
|
|
|
spin_unlock_bh(&seq->lock);
|
|
exit:
|
|
read_unlock_bh(&tipc_nametbl_lock);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* tipc_nametbl_publish - add name publication to network name tables
|
|
*/
|
|
struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
|
|
u32 scope, u32 port_ref, u32 key)
|
|
{
|
|
struct publication *publ;
|
|
|
|
if (table.local_publ_count >= TIPC_MAX_PUBLICATIONS) {
|
|
pr_warn("Publication failed, local publication limit reached (%u)\n",
|
|
TIPC_MAX_PUBLICATIONS);
|
|
return NULL;
|
|
}
|
|
|
|
write_lock_bh(&tipc_nametbl_lock);
|
|
publ = tipc_nametbl_insert_publ(type, lower, upper, scope,
|
|
tipc_own_addr, port_ref, key);
|
|
if (likely(publ)) {
|
|
table.local_publ_count++;
|
|
tipc_named_publish(publ);
|
|
}
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
|
return publ;
|
|
}
|
|
|
|
/**
|
|
* tipc_nametbl_withdraw - withdraw name publication from network name tables
|
|
*/
|
|
int tipc_nametbl_withdraw(u32 type, u32 lower, u32 ref, u32 key)
|
|
{
|
|
struct publication *publ;
|
|
|
|
write_lock_bh(&tipc_nametbl_lock);
|
|
publ = tipc_nametbl_remove_publ(type, lower, tipc_own_addr, ref, key);
|
|
if (likely(publ)) {
|
|
table.local_publ_count--;
|
|
tipc_named_withdraw(publ);
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
|
list_del_init(&publ->pport_list);
|
|
kfree(publ);
|
|
return 1;
|
|
}
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
|
pr_err("Unable to remove local publication\n"
|
|
"(type=%u, lower=%u, ref=%u, key=%u)\n",
|
|
type, lower, ref, key);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* tipc_nametbl_subscribe - add a subscription object to the name table
|
|
*/
|
|
void tipc_nametbl_subscribe(struct tipc_subscription *s)
|
|
{
|
|
u32 type = s->seq.type;
|
|
struct name_seq *seq;
|
|
|
|
write_lock_bh(&tipc_nametbl_lock);
|
|
seq = nametbl_find_seq(type);
|
|
if (!seq)
|
|
seq = tipc_nameseq_create(type, &table.types[hash(type)]);
|
|
if (seq) {
|
|
spin_lock_bh(&seq->lock);
|
|
tipc_nameseq_subscribe(seq, s);
|
|
spin_unlock_bh(&seq->lock);
|
|
} else {
|
|
pr_warn("Failed to create subscription for {%u,%u,%u}\n",
|
|
s->seq.type, s->seq.lower, s->seq.upper);
|
|
}
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
|
}
|
|
|
|
/**
|
|
* tipc_nametbl_unsubscribe - remove a subscription object from name table
|
|
*/
|
|
void tipc_nametbl_unsubscribe(struct tipc_subscription *s)
|
|
{
|
|
struct name_seq *seq;
|
|
|
|
write_lock_bh(&tipc_nametbl_lock);
|
|
seq = nametbl_find_seq(s->seq.type);
|
|
if (seq != NULL) {
|
|
spin_lock_bh(&seq->lock);
|
|
list_del_init(&s->nameseq_list);
|
|
spin_unlock_bh(&seq->lock);
|
|
nameseq_delete_empty(seq);
|
|
}
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
|
}
|
|
|
|
|
|
/**
|
|
* subseq_list - print specified sub-sequence contents into the given buffer
|
|
*/
|
|
static int subseq_list(struct sub_seq *sseq, char *buf, int len, u32 depth,
|
|
u32 index)
|
|
{
|
|
char portIdStr[27];
|
|
const char *scope_str[] = {"", " zone", " cluster", " node"};
|
|
struct publication *publ;
|
|
struct name_info *info;
|
|
int ret;
|
|
|
|
ret = tipc_snprintf(buf, len, "%-10u %-10u ", sseq->lower, sseq->upper);
|
|
|
|
if (depth == 2) {
|
|
ret += tipc_snprintf(buf - ret, len + ret, "\n");
|
|
return ret;
|
|
}
|
|
|
|
info = sseq->info;
|
|
|
|
list_for_each_entry(publ, &info->zone_list, zone_list) {
|
|
sprintf(portIdStr, "<%u.%u.%u:%u>",
|
|
tipc_zone(publ->node), tipc_cluster(publ->node),
|
|
tipc_node(publ->node), publ->ref);
|
|
ret += tipc_snprintf(buf + ret, len - ret, "%-26s ", portIdStr);
|
|
if (depth > 3) {
|
|
ret += tipc_snprintf(buf + ret, len - ret, "%-10u %s",
|
|
publ->key, scope_str[publ->scope]);
|
|
}
|
|
if (!list_is_last(&publ->zone_list, &info->zone_list))
|
|
ret += tipc_snprintf(buf + ret, len - ret,
|
|
"\n%33s", " ");
|
|
}
|
|
|
|
ret += tipc_snprintf(buf + ret, len - ret, "\n");
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nameseq_list - print specified name sequence contents into the given buffer
|
|
*/
|
|
static int nameseq_list(struct name_seq *seq, char *buf, int len, u32 depth,
|
|
u32 type, u32 lowbound, u32 upbound, u32 index)
|
|
{
|
|
struct sub_seq *sseq;
|
|
char typearea[11];
|
|
int ret = 0;
|
|
|
|
if (seq->first_free == 0)
|
|
return 0;
|
|
|
|
sprintf(typearea, "%-10u", seq->type);
|
|
|
|
if (depth == 1) {
|
|
ret += tipc_snprintf(buf, len, "%s\n", typearea);
|
|
return ret;
|
|
}
|
|
|
|
for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) {
|
|
if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) {
|
|
ret += tipc_snprintf(buf + ret, len - ret, "%s ",
|
|
typearea);
|
|
spin_lock_bh(&seq->lock);
|
|
ret += subseq_list(sseq, buf + ret, len - ret,
|
|
depth, index);
|
|
spin_unlock_bh(&seq->lock);
|
|
sprintf(typearea, "%10s", " ");
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nametbl_header - print name table header into the given buffer
|
|
*/
|
|
static int nametbl_header(char *buf, int len, u32 depth)
|
|
{
|
|
const char *header[] = {
|
|
"Type ",
|
|
"Lower Upper ",
|
|
"Port Identity ",
|
|
"Publication Scope"
|
|
};
|
|
|
|
int i;
|
|
int ret = 0;
|
|
|
|
if (depth > 4)
|
|
depth = 4;
|
|
for (i = 0; i < depth; i++)
|
|
ret += tipc_snprintf(buf + ret, len - ret, header[i]);
|
|
ret += tipc_snprintf(buf + ret, len - ret, "\n");
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nametbl_list - print specified name table contents into the given buffer
|
|
*/
|
|
static int nametbl_list(char *buf, int len, u32 depth_info,
|
|
u32 type, u32 lowbound, u32 upbound)
|
|
{
|
|
struct hlist_head *seq_head;
|
|
struct name_seq *seq;
|
|
int all_types;
|
|
int ret = 0;
|
|
u32 depth;
|
|
u32 i;
|
|
|
|
all_types = (depth_info & TIPC_NTQ_ALLTYPES);
|
|
depth = (depth_info & ~TIPC_NTQ_ALLTYPES);
|
|
|
|
if (depth == 0)
|
|
return 0;
|
|
|
|
if (all_types) {
|
|
/* display all entries in name table to specified depth */
|
|
ret += nametbl_header(buf, len, depth);
|
|
lowbound = 0;
|
|
upbound = ~0;
|
|
for (i = 0; i < TIPC_NAMETBL_SIZE; i++) {
|
|
seq_head = &table.types[i];
|
|
hlist_for_each_entry(seq, seq_head, ns_list) {
|
|
ret += nameseq_list(seq, buf + ret, len - ret,
|
|
depth, seq->type,
|
|
lowbound, upbound, i);
|
|
}
|
|
}
|
|
} else {
|
|
/* display only the sequence that matches the specified type */
|
|
if (upbound < lowbound) {
|
|
ret += tipc_snprintf(buf + ret, len - ret,
|
|
"invalid name sequence specified\n");
|
|
return ret;
|
|
}
|
|
ret += nametbl_header(buf + ret, len - ret, depth);
|
|
i = hash(type);
|
|
seq_head = &table.types[i];
|
|
hlist_for_each_entry(seq, seq_head, ns_list) {
|
|
if (seq->type == type) {
|
|
ret += nameseq_list(seq, buf + ret, len - ret,
|
|
depth, type,
|
|
lowbound, upbound, i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
struct sk_buff *tipc_nametbl_get(const void *req_tlv_area, int req_tlv_space)
|
|
{
|
|
struct sk_buff *buf;
|
|
struct tipc_name_table_query *argv;
|
|
struct tlv_desc *rep_tlv;
|
|
char *pb;
|
|
int pb_len;
|
|
int str_len;
|
|
|
|
if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NAME_TBL_QUERY))
|
|
return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
|
|
|
|
buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
rep_tlv = (struct tlv_desc *)buf->data;
|
|
pb = TLV_DATA(rep_tlv);
|
|
pb_len = ULTRA_STRING_MAX_LEN;
|
|
argv = (struct tipc_name_table_query *)TLV_DATA(req_tlv_area);
|
|
read_lock_bh(&tipc_nametbl_lock);
|
|
str_len = nametbl_list(pb, pb_len, ntohl(argv->depth),
|
|
ntohl(argv->type),
|
|
ntohl(argv->lowbound), ntohl(argv->upbound));
|
|
read_unlock_bh(&tipc_nametbl_lock);
|
|
str_len += 1; /* for "\0" */
|
|
skb_put(buf, TLV_SPACE(str_len));
|
|
TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
|
|
|
|
return buf;
|
|
}
|
|
|
|
int tipc_nametbl_init(void)
|
|
{
|
|
table.types = kcalloc(TIPC_NAMETBL_SIZE, sizeof(struct hlist_head),
|
|
GFP_ATOMIC);
|
|
if (!table.types)
|
|
return -ENOMEM;
|
|
|
|
table.local_publ_count = 0;
|
|
return 0;
|
|
}
|
|
|
|
void tipc_nametbl_stop(void)
|
|
{
|
|
u32 i;
|
|
|
|
if (!table.types)
|
|
return;
|
|
|
|
/* Verify name table is empty, then release it */
|
|
write_lock_bh(&tipc_nametbl_lock);
|
|
for (i = 0; i < TIPC_NAMETBL_SIZE; i++) {
|
|
if (hlist_empty(&table.types[i]))
|
|
continue;
|
|
pr_err("nametbl_stop(): orphaned hash chain detected\n");
|
|
break;
|
|
}
|
|
kfree(table.types);
|
|
table.types = NULL;
|
|
write_unlock_bh(&tipc_nametbl_lock);
|
|
}
|