Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/name_table.c: TIPC name table code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 4 | * Copyright (c) 2000-2006, 2014, Ericsson AB |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 5 | * Copyright (c) 2004-2008, 2010-2014, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the names of the copyright holders nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 20 | * Alternatively, this software may be distributed under the terms of the |
| 21 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 22 | * Software Foundation. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 37 | #include <net/sock.h> |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 38 | #include "core.h" |
| 39 | #include "config.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "name_table.h" |
| 41 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 42 | #include "subscr.h" |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 43 | #include "bcast.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 45 | #define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 46 | |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 47 | static const struct nla_policy |
| 48 | tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = { |
| 49 | [TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC }, |
| 50 | [TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED } |
| 51 | }; |
| 52 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 53 | /** |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 54 | * struct name_info - name sequence publication info |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 55 | * @node_list: circular list of publications made by own node |
| 56 | * @cluster_list: circular list of publications made by own cluster |
| 57 | * @zone_list: circular list of publications made by own zone |
| 58 | * @node_list_size: number of entries in "node_list" |
| 59 | * @cluster_list_size: number of entries in "cluster_list" |
| 60 | * @zone_list_size: number of entries in "zone_list" |
| 61 | * |
| 62 | * Note: The zone list always contains at least one entry, since all |
| 63 | * publications of the associated name sequence belong to it. |
| 64 | * (The cluster and node lists may be empty.) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 65 | */ |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 66 | struct name_info { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 67 | struct list_head node_list; |
| 68 | struct list_head cluster_list; |
| 69 | struct list_head zone_list; |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 70 | u32 node_list_size; |
| 71 | u32 cluster_list_size; |
| 72 | u32 zone_list_size; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 73 | }; |
| 74 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 75 | /** |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 76 | * struct sub_seq - container for all published instances of a name sequence |
| 77 | * @lower: name sequence lower bound |
| 78 | * @upper: name sequence upper bound |
| 79 | * @info: pointer to name sequence publication info |
| 80 | */ |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 81 | struct sub_seq { |
| 82 | u32 lower; |
| 83 | u32 upper; |
| 84 | struct name_info *info; |
| 85 | }; |
| 86 | |
| 87 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 88 | * struct name_seq - container for all published instances of a name type |
| 89 | * @type: 32 bit 'type' value for name sequence |
| 90 | * @sseq: pointer to dynamically-sized array of sub-sequences of this 'type'; |
| 91 | * sub-sequences are sorted in ascending order |
| 92 | * @alloc: number of sub-sequences currently in array |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 93 | * @first_free: array index of first unused sub-sequence entry |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 94 | * @ns_list: links to adjacent name sequences in hash chain |
| 95 | * @subscriptions: list of subscriptions for this 'type' |
Allan Stephens | 307fdf5 | 2008-06-04 17:38:22 -0700 | [diff] [blame] | 96 | * @lock: spinlock controlling access to publication lists of all sub-sequences |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 97 | * @rcu: RCU callback head used for deferred freeing |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 98 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 99 | struct name_seq { |
| 100 | u32 type; |
| 101 | struct sub_seq *sseqs; |
| 102 | u32 alloc; |
| 103 | u32 first_free; |
| 104 | struct hlist_node ns_list; |
| 105 | struct list_head subscriptions; |
| 106 | spinlock_t lock; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 107 | struct rcu_head rcu; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 108 | }; |
| 109 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 110 | static int hash(int x) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 111 | { |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 112 | return x & (TIPC_NAMETBL_SIZE - 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | /** |
| 116 | * publ_create - create a publication structure |
| 117 | */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 118 | static struct publication *publ_create(u32 type, u32 lower, u32 upper, |
| 119 | u32 scope, u32 node, u32 port_ref, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 120 | u32 key) |
| 121 | { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 122 | struct publication *publ = kzalloc(sizeof(*publ), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 123 | if (publ == NULL) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 124 | pr_warn("Publication creation failure, no memory\n"); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 125 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 126 | } |
| 127 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 128 | publ->type = type; |
| 129 | publ->lower = lower; |
| 130 | publ->upper = upper; |
| 131 | publ->scope = scope; |
| 132 | publ->node = node; |
| 133 | publ->ref = port_ref; |
| 134 | publ->key = key; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 135 | INIT_LIST_HEAD(&publ->pport_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 136 | return publ; |
| 137 | } |
| 138 | |
| 139 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 140 | * tipc_subseq_alloc - allocate a specified number of sub-sequence structures |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 141 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 142 | static struct sub_seq *tipc_subseq_alloc(u32 cnt) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 143 | { |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 144 | return kcalloc(cnt, sizeof(struct sub_seq), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 148 | * tipc_nameseq_create - create a name sequence structure for the specified 'type' |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 149 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 150 | * Allocates a single sub-sequence structure and sets it to all 0's. |
| 151 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 152 | static struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 153 | { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 154 | struct name_seq *nseq = kzalloc(sizeof(*nseq), GFP_ATOMIC); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 155 | struct sub_seq *sseq = tipc_subseq_alloc(1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 156 | |
| 157 | if (!nseq || !sseq) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 158 | pr_warn("Name sequence creation failed, no memory\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 159 | kfree(nseq); |
| 160 | kfree(sseq); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 161 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 162 | } |
| 163 | |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 164 | spin_lock_init(&nseq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 165 | nseq->type = type; |
| 166 | nseq->sseqs = sseq; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 167 | nseq->alloc = 1; |
| 168 | INIT_HLIST_NODE(&nseq->ns_list); |
| 169 | INIT_LIST_HEAD(&nseq->subscriptions); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 170 | hlist_add_head_rcu(&nseq->ns_list, seq_head); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 171 | return nseq; |
| 172 | } |
| 173 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 174 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 175 | * nameseq_find_subseq - find sub-sequence (if any) matching a name instance |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 176 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 177 | * Very time-critical, so binary searches through sub-sequence array. |
| 178 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 179 | static struct sub_seq *nameseq_find_subseq(struct name_seq *nseq, |
| 180 | u32 instance) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 181 | { |
| 182 | struct sub_seq *sseqs = nseq->sseqs; |
| 183 | int low = 0; |
| 184 | int high = nseq->first_free - 1; |
| 185 | int mid; |
| 186 | |
| 187 | while (low <= high) { |
| 188 | mid = (low + high) / 2; |
| 189 | if (instance < sseqs[mid].lower) |
| 190 | high = mid - 1; |
| 191 | else if (instance > sseqs[mid].upper) |
| 192 | low = mid + 1; |
| 193 | else |
| 194 | return &sseqs[mid]; |
| 195 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 196 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | /** |
| 200 | * nameseq_locate_subseq - determine position of name instance in sub-sequence |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 201 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 202 | * Returns index in sub-sequence array of the entry that contains the specified |
| 203 | * instance value; if no entry contains that value, returns the position |
| 204 | * where a new entry for it would be inserted in the array. |
| 205 | * |
| 206 | * Note: Similar to binary search code for locating a sub-sequence. |
| 207 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 208 | static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance) |
| 209 | { |
| 210 | struct sub_seq *sseqs = nseq->sseqs; |
| 211 | int low = 0; |
| 212 | int high = nseq->first_free - 1; |
| 213 | int mid; |
| 214 | |
| 215 | while (low <= high) { |
| 216 | mid = (low + high) / 2; |
| 217 | if (instance < sseqs[mid].lower) |
| 218 | high = mid - 1; |
| 219 | else if (instance > sseqs[mid].upper) |
| 220 | low = mid + 1; |
| 221 | else |
| 222 | return mid; |
| 223 | } |
| 224 | return low; |
| 225 | } |
| 226 | |
| 227 | /** |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 228 | * tipc_nameseq_insert_publ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 229 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 230 | static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq, |
| 231 | u32 type, u32 lower, u32 upper, |
| 232 | u32 scope, u32 node, u32 port, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | { |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 234 | struct tipc_subscription *s; |
| 235 | struct tipc_subscription *st; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 236 | struct publication *publ; |
| 237 | struct sub_seq *sseq; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 238 | struct name_info *info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 239 | int created_subseq = 0; |
| 240 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 241 | sseq = nameseq_find_subseq(nseq, lower); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 242 | if (sseq) { |
| 243 | |
| 244 | /* Lower end overlaps existing entry => need an exact match */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 245 | if ((sseq->lower != lower) || (sseq->upper != upper)) { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 246 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 247 | } |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 248 | |
| 249 | info = sseq->info; |
Allan Stephens | f80c24d | 2011-11-03 11:12:01 -0400 | [diff] [blame] | 250 | |
| 251 | /* Check if an identical publication already exists */ |
| 252 | list_for_each_entry(publ, &info->zone_list, zone_list) { |
| 253 | if ((publ->ref == port) && (publ->key == key) && |
| 254 | (!publ->node || (publ->node == node))) |
| 255 | return NULL; |
| 256 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 257 | } else { |
| 258 | u32 inspos; |
| 259 | struct sub_seq *freesseq; |
| 260 | |
| 261 | /* Find where lower end should be inserted */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 262 | inspos = nameseq_locate_subseq(nseq, lower); |
| 263 | |
| 264 | /* Fail if upper end overlaps into an existing entry */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 265 | if ((inspos < nseq->first_free) && |
| 266 | (upper >= nseq->sseqs[inspos].lower)) { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 267 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | /* Ensure there is space for new sub-sequence */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 271 | if (nseq->first_free == nseq->alloc) { |
Allan Stephens | 9ab230f | 2006-06-25 23:37:24 -0700 | [diff] [blame] | 272 | struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2); |
| 273 | |
| 274 | if (!sseqs) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 275 | pr_warn("Cannot publish {%u,%u,%u}, no memory\n", |
| 276 | type, lower, upper); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 277 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 278 | } |
Allan Stephens | 9ab230f | 2006-06-25 23:37:24 -0700 | [diff] [blame] | 279 | memcpy(sseqs, nseq->sseqs, |
| 280 | nseq->alloc * sizeof(struct sub_seq)); |
| 281 | kfree(nseq->sseqs); |
| 282 | nseq->sseqs = sseqs; |
| 283 | nseq->alloc *= 2; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 284 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 285 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 286 | info = kzalloc(sizeof(*info), GFP_ATOMIC); |
| 287 | if (!info) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 288 | pr_warn("Cannot publish {%u,%u,%u}, no memory\n", |
| 289 | type, lower, upper); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 290 | return NULL; |
| 291 | } |
| 292 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 293 | INIT_LIST_HEAD(&info->node_list); |
| 294 | INIT_LIST_HEAD(&info->cluster_list); |
| 295 | INIT_LIST_HEAD(&info->zone_list); |
| 296 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | /* Insert new sub-sequence */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 298 | sseq = &nseq->sseqs[inspos]; |
| 299 | freesseq = &nseq->sseqs[nseq->first_free]; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 300 | memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof(*sseq)); |
| 301 | memset(sseq, 0, sizeof(*sseq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 302 | nseq->first_free++; |
| 303 | sseq->lower = lower; |
| 304 | sseq->upper = upper; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 305 | sseq->info = info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 306 | created_subseq = 1; |
| 307 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 308 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 309 | /* Insert a publication */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 310 | publ = publ_create(type, lower, upper, scope, node, port, key); |
| 311 | if (!publ) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 312 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 313 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 314 | list_add(&publ->zone_list, &info->zone_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 315 | info->zone_list_size++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 316 | |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 317 | if (in_own_cluster(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 318 | list_add(&publ->cluster_list, &info->cluster_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 319 | info->cluster_list_size++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 320 | } |
| 321 | |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 322 | if (in_own_node(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 323 | list_add(&publ->node_list, &info->node_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 324 | info->node_list_size++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 325 | } |
| 326 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 327 | /* Any subscriptions waiting for notification? */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 328 | list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 329 | tipc_subscr_report_overlap(s, |
| 330 | publ->lower, |
| 331 | publ->upper, |
| 332 | TIPC_PUBLISHED, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 333 | publ->ref, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 334 | publ->node, |
| 335 | created_subseq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 336 | } |
| 337 | return publ; |
| 338 | } |
| 339 | |
| 340 | /** |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 341 | * tipc_nameseq_remove_publ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 342 | * |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 343 | * NOTE: There may be cases where TIPC is asked to remove a publication |
| 344 | * that is not in the name table. For example, if another node issues a |
| 345 | * publication for a name sequence that overlaps an existing name sequence |
| 346 | * the publication will not be recorded, which means the publication won't |
| 347 | * be found when the name sequence is later withdrawn by that node. |
| 348 | * A failed withdraw request simply returns a failure indication and lets the |
| 349 | * caller issue any error or warning messages associated with such a problem. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 350 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 351 | static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst, |
| 352 | u32 node, u32 ref, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 353 | { |
| 354 | struct publication *publ; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 355 | struct sub_seq *sseq = nameseq_find_subseq(nseq, inst); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 356 | struct name_info *info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 357 | struct sub_seq *free; |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 358 | struct tipc_subscription *s, *st; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 359 | int removed_subseq = 0; |
| 360 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 361 | if (!sseq) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 362 | return NULL; |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 363 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 364 | info = sseq->info; |
| 365 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 366 | /* Locate publication, if it exists */ |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 367 | list_for_each_entry(publ, &info->zone_list, zone_list) { |
| 368 | if ((publ->key == key) && (publ->ref == ref) && |
| 369 | (!publ->node || (publ->node == node))) |
| 370 | goto found; |
| 371 | } |
| 372 | return NULL; |
| 373 | |
| 374 | found: |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 375 | /* Remove publication from zone scope list */ |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 376 | list_del(&publ->zone_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 377 | info->zone_list_size--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 378 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 379 | /* Remove publication from cluster scope list, if present */ |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 380 | if (in_own_cluster(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 381 | list_del(&publ->cluster_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 382 | info->cluster_list_size--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 383 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 384 | |
| 385 | /* Remove publication from node scope list, if present */ |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 386 | if (in_own_node(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 387 | list_del(&publ->node_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 388 | info->node_list_size--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 389 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 390 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 391 | /* Contract subseq list if no more publications for that subseq */ |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 392 | if (list_empty(&info->zone_list)) { |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 393 | kfree(info); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 394 | free = &nseq->sseqs[nseq->first_free--]; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 395 | memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof(*sseq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | removed_subseq = 1; |
| 397 | } |
| 398 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 399 | /* Notify any waiting subscriptions */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 400 | list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 401 | tipc_subscr_report_overlap(s, |
| 402 | publ->lower, |
| 403 | publ->upper, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 404 | TIPC_WITHDRAWN, |
| 405 | publ->ref, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 406 | publ->node, |
| 407 | removed_subseq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 408 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 409 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 410 | return publ; |
| 411 | } |
| 412 | |
| 413 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 414 | * tipc_nameseq_subscribe - attach a subscription, and issue |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 415 | * the prescribed number of events if there is any sub- |
| 416 | * sequence overlapping with the requested sequence |
| 417 | */ |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 418 | static void tipc_nameseq_subscribe(struct name_seq *nseq, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 419 | struct tipc_subscription *s) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 420 | { |
| 421 | struct sub_seq *sseq = nseq->sseqs; |
| 422 | |
| 423 | list_add(&s->nameseq_list, &nseq->subscriptions); |
| 424 | |
| 425 | if (!sseq) |
| 426 | return; |
| 427 | |
| 428 | while (sseq != &nseq->sseqs[nseq->first_free]) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 429 | if (tipc_subscr_overlap(s, sseq->lower, sseq->upper)) { |
| 430 | struct publication *crs; |
| 431 | struct name_info *info = sseq->info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | int must_report = 1; |
| 433 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 434 | list_for_each_entry(crs, &info->zone_list, zone_list) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 435 | tipc_subscr_report_overlap(s, |
| 436 | sseq->lower, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 437 | sseq->upper, |
| 438 | TIPC_PUBLISHED, |
| 439 | crs->ref, |
| 440 | crs->node, |
| 441 | must_report); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 442 | must_report = 0; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 443 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 444 | } |
| 445 | sseq++; |
| 446 | } |
| 447 | } |
| 448 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 449 | static struct name_seq *nametbl_find_seq(struct net *net, u32 type) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 450 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 451 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 452 | struct hlist_head *seq_head; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 453 | struct name_seq *ns; |
| 454 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 455 | seq_head = &tn->nametbl->seq_hlist[hash(type)]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 456 | hlist_for_each_entry_rcu(ns, seq_head, ns_list) { |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 457 | if (ns->type == type) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 458 | return ns; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 459 | } |
| 460 | |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 461 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | }; |
| 463 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 464 | struct publication *tipc_nametbl_insert_publ(struct net *net, u32 type, |
| 465 | u32 lower, u32 upper, u32 scope, |
| 466 | u32 node, u32 port, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 467 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 468 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 469 | struct publication *publ; |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 470 | struct name_seq *seq = nametbl_find_seq(net, type); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 471 | int index = hash(type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 472 | |
Allan Stephens | 8f17789 | 2012-04-26 17:57:17 -0400 | [diff] [blame] | 473 | if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE) || |
| 474 | (lower > upper)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 475 | pr_debug("Failed to publish illegal {%u,%u,%u} with scope %u\n", |
| 476 | type, lower, upper, scope); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 477 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 478 | } |
| 479 | |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 480 | if (!seq) |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 481 | seq = tipc_nameseq_create(type, &tn->nametbl->seq_hlist[index]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 482 | if (!seq) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 483 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 484 | |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 485 | spin_lock_bh(&seq->lock); |
| 486 | publ = tipc_nameseq_insert_publ(seq, type, lower, upper, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 487 | scope, node, port, key); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 488 | spin_unlock_bh(&seq->lock); |
| 489 | return publ; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 490 | } |
| 491 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 492 | struct publication *tipc_nametbl_remove_publ(struct net *net, u32 type, |
| 493 | u32 lower, u32 node, u32 ref, |
| 494 | u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 495 | { |
| 496 | struct publication *publ; |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 497 | struct name_seq *seq = nametbl_find_seq(net, type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 498 | |
| 499 | if (!seq) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 500 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 501 | |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 502 | spin_lock_bh(&seq->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 503 | publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 504 | if (!seq->first_free && list_empty(&seq->subscriptions)) { |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 505 | hlist_del_init_rcu(&seq->ns_list); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 506 | kfree(seq->sseqs); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 507 | spin_unlock_bh(&seq->lock); |
| 508 | kfree_rcu(seq, rcu); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 509 | return publ; |
| 510 | } |
| 511 | spin_unlock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 512 | return publ; |
| 513 | } |
| 514 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 515 | /** |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 516 | * tipc_nametbl_translate - perform name translation |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 517 | * |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 518 | * On entry, 'destnode' is the search domain used during translation. |
| 519 | * |
| 520 | * On exit: |
| 521 | * - if name translation is deferred to another node/cluster/zone, |
| 522 | * leaves 'destnode' unchanged (will be non-zero) and returns 0 |
| 523 | * - if name translation is attempted and succeeds, sets 'destnode' |
| 524 | * to publishing node and returns port reference (will be non-zero) |
| 525 | * - if name translation is attempted and fails, sets 'destnode' to 0 |
| 526 | * and returns 0 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 527 | */ |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 528 | u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, |
| 529 | u32 *destnode) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 530 | { |
| 531 | struct sub_seq *sseq; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 532 | struct name_info *info; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 533 | struct publication *publ; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 534 | struct name_seq *seq; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 535 | u32 ref = 0; |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 536 | u32 node = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 538 | if (!tipc_in_scope(*destnode, tipc_own_addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 539 | return 0; |
| 540 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 541 | rcu_read_lock(); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 542 | seq = nametbl_find_seq(net, type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 543 | if (unlikely(!seq)) |
| 544 | goto not_found; |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 545 | spin_lock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 546 | sseq = nameseq_find_subseq(seq, instance); |
| 547 | if (unlikely(!sseq)) |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 548 | goto no_match; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 549 | info = sseq->info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 551 | /* Closest-First Algorithm */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 552 | if (likely(!*destnode)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 553 | if (!list_empty(&info->node_list)) { |
| 554 | publ = list_first_entry(&info->node_list, |
| 555 | struct publication, |
| 556 | node_list); |
| 557 | list_move_tail(&publ->node_list, |
| 558 | &info->node_list); |
| 559 | } else if (!list_empty(&info->cluster_list)) { |
| 560 | publ = list_first_entry(&info->cluster_list, |
| 561 | struct publication, |
| 562 | cluster_list); |
| 563 | list_move_tail(&publ->cluster_list, |
| 564 | &info->cluster_list); |
Allan Stephens | 8af4638 | 2011-05-30 11:27:50 -0400 | [diff] [blame] | 565 | } else { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 566 | publ = list_first_entry(&info->zone_list, |
| 567 | struct publication, |
| 568 | zone_list); |
| 569 | list_move_tail(&publ->zone_list, |
| 570 | &info->zone_list); |
Allan Stephens | 8af4638 | 2011-05-30 11:27:50 -0400 | [diff] [blame] | 571 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | } |
| 573 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 574 | /* Round-Robin Algorithm */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 575 | else if (*destnode == tipc_own_addr) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 576 | if (list_empty(&info->node_list)) |
| 577 | goto no_match; |
| 578 | publ = list_first_entry(&info->node_list, struct publication, |
| 579 | node_list); |
| 580 | list_move_tail(&publ->node_list, &info->node_list); |
Allan Stephens | 336ebf5 | 2012-04-17 18:02:01 -0400 | [diff] [blame] | 581 | } else if (in_own_cluster_exact(*destnode)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 582 | if (list_empty(&info->cluster_list)) |
| 583 | goto no_match; |
| 584 | publ = list_first_entry(&info->cluster_list, struct publication, |
| 585 | cluster_list); |
| 586 | list_move_tail(&publ->cluster_list, &info->cluster_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 587 | } else { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 588 | publ = list_first_entry(&info->zone_list, struct publication, |
| 589 | zone_list); |
| 590 | list_move_tail(&publ->zone_list, &info->zone_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 591 | } |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 592 | |
| 593 | ref = publ->ref; |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 594 | node = publ->node; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 595 | no_match: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 596 | spin_unlock_bh(&seq->lock); |
| 597 | not_found: |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 598 | rcu_read_unlock(); |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 599 | *destnode = node; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 600 | return ref; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 601 | } |
| 602 | |
| 603 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 604 | * tipc_nametbl_mc_translate - find multicast destinations |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 605 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 606 | * Creates list of all local ports that overlap the given multicast address; |
| 607 | * also determines if any off-node ports overlap. |
| 608 | * |
| 609 | * Note: Publications with a scope narrower than 'limit' are ignored. |
| 610 | * (i.e. local node-scope publications mustn't receive messages arriving |
| 611 | * from another node, even if the multcast link brought it here) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 612 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 613 | * Returns non-zero if any off-node ports overlap |
| 614 | */ |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 615 | int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper, |
| 616 | u32 limit, struct tipc_port_list *dports) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 617 | { |
| 618 | struct name_seq *seq; |
| 619 | struct sub_seq *sseq; |
| 620 | struct sub_seq *sseq_stop; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 621 | struct name_info *info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 622 | int res = 0; |
| 623 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 624 | rcu_read_lock(); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 625 | seq = nametbl_find_seq(net, type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 626 | if (!seq) |
| 627 | goto exit; |
| 628 | |
| 629 | spin_lock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 630 | sseq = seq->sseqs + nameseq_locate_subseq(seq, lower); |
| 631 | sseq_stop = seq->sseqs + seq->first_free; |
| 632 | for (; sseq != sseq_stop; sseq++) { |
| 633 | struct publication *publ; |
| 634 | |
| 635 | if (sseq->lower > upper) |
| 636 | break; |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 637 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 638 | info = sseq->info; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 639 | list_for_each_entry(publ, &info->node_list, node_list) { |
| 640 | if (publ->scope <= limit) |
| 641 | tipc_port_list_add(dports, publ->ref); |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 642 | } |
| 643 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 644 | if (info->cluster_list_size != info->node_list_size) |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 645 | res = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 646 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 647 | spin_unlock_bh(&seq->lock); |
| 648 | exit: |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 649 | rcu_read_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 650 | return res; |
| 651 | } |
| 652 | |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 653 | /* |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 654 | * tipc_nametbl_publish - add name publication to network name tables |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 655 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 656 | struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower, |
| 657 | u32 upper, u32 scope, u32 port_ref, |
| 658 | u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 659 | { |
| 660 | struct publication *publ; |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 661 | struct sk_buff *buf = NULL; |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 662 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 663 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 664 | spin_lock_bh(&tn->nametbl_lock); |
| 665 | if (tn->nametbl->local_publ_count >= TIPC_MAX_PUBLICATIONS) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 666 | pr_warn("Publication failed, local publication limit reached (%u)\n", |
Ying Xue | e6a04b1 | 2012-08-16 12:09:14 +0000 | [diff] [blame] | 667 | TIPC_MAX_PUBLICATIONS); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 668 | spin_unlock_bh(&tn->nametbl_lock); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 669 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 670 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 671 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 672 | publ = tipc_nametbl_insert_publ(net, type, lower, upper, scope, |
| 673 | tipc_own_addr, port_ref, key); |
Allan Stephens | fd6eced | 2011-11-09 14:22:52 -0500 | [diff] [blame] | 674 | if (likely(publ)) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 675 | tn->nametbl->local_publ_count++; |
| 676 | buf = tipc_named_publish(net, publ); |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 677 | /* Any pending external events? */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 678 | tipc_named_process_backlog(net); |
Allan Stephens | fd6eced | 2011-11-09 14:22:52 -0500 | [diff] [blame] | 679 | } |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 680 | spin_unlock_bh(&tn->nametbl_lock); |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 681 | |
| 682 | if (buf) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 683 | named_cluster_distribute(net, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 684 | return publ; |
| 685 | } |
| 686 | |
| 687 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 688 | * tipc_nametbl_withdraw - withdraw name publication from network name tables |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 689 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 690 | int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower, u32 ref, |
| 691 | u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 692 | { |
| 693 | struct publication *publ; |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 694 | struct sk_buff *skb = NULL; |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 695 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 696 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 697 | spin_lock_bh(&tn->nametbl_lock); |
| 698 | publ = tipc_nametbl_remove_publ(net, type, lower, tipc_own_addr, |
| 699 | ref, key); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 700 | if (likely(publ)) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 701 | tn->nametbl->local_publ_count--; |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 702 | skb = tipc_named_withdraw(publ); |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 703 | /* Any pending external events? */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 704 | tipc_named_process_backlog(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 705 | list_del_init(&publ->pport_list); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 706 | kfree_rcu(publ, rcu); |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 707 | } else { |
| 708 | pr_err("Unable to remove local publication\n" |
| 709 | "(type=%u, lower=%u, ref=%u, key=%u)\n", |
| 710 | type, lower, ref, key); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 711 | } |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 712 | spin_unlock_bh(&tn->nametbl_lock); |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 713 | |
| 714 | if (skb) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 715 | named_cluster_distribute(net, skb); |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 716 | return 1; |
| 717 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 718 | return 0; |
| 719 | } |
| 720 | |
| 721 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 722 | * tipc_nametbl_subscribe - add a subscription object to the name table |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 723 | */ |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 724 | void tipc_nametbl_subscribe(struct tipc_subscription *s) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 725 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 726 | struct tipc_net *tn = net_generic(s->net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 727 | u32 type = s->seq.type; |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 728 | int index = hash(type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 729 | struct name_seq *seq; |
| 730 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 731 | spin_lock_bh(&tn->nametbl_lock); |
| 732 | seq = nametbl_find_seq(s->net, type); |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 733 | if (!seq) |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 734 | seq = tipc_nameseq_create(type, &tn->nametbl->seq_hlist[index]); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 735 | if (seq) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 736 | spin_lock_bh(&seq->lock); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 737 | tipc_nameseq_subscribe(seq, s); |
| 738 | spin_unlock_bh(&seq->lock); |
| 739 | } else { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 740 | pr_warn("Failed to create subscription for {%u,%u,%u}\n", |
| 741 | s->seq.type, s->seq.lower, s->seq.upper); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 742 | } |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 743 | spin_unlock_bh(&tn->nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 747 | * tipc_nametbl_unsubscribe - remove a subscription object from name table |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 748 | */ |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 749 | void tipc_nametbl_unsubscribe(struct tipc_subscription *s) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 750 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 751 | struct tipc_net *tn = net_generic(s->net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 752 | struct name_seq *seq; |
| 753 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 754 | spin_lock_bh(&tn->nametbl_lock); |
| 755 | seq = nametbl_find_seq(s->net, s->seq.type); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 756 | if (seq != NULL) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 757 | spin_lock_bh(&seq->lock); |
| 758 | list_del_init(&s->nameseq_list); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 759 | if (!seq->first_free && list_empty(&seq->subscriptions)) { |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 760 | hlist_del_init_rcu(&seq->ns_list); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 761 | kfree(seq->sseqs); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 762 | spin_unlock_bh(&seq->lock); |
| 763 | kfree_rcu(seq, rcu); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 764 | } else { |
| 765 | spin_unlock_bh(&seq->lock); |
| 766 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 767 | } |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 768 | spin_unlock_bh(&tn->nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 769 | } |
| 770 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 771 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 772 | * subseq_list - print specified sub-sequence contents into the given buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 773 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 774 | static int subseq_list(struct sub_seq *sseq, char *buf, int len, u32 depth, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 775 | u32 index) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 776 | { |
| 777 | char portIdStr[27]; |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 778 | const char *scope_str[] = {"", " zone", " cluster", " node"}; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 779 | struct publication *publ; |
| 780 | struct name_info *info; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 781 | int ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 782 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 783 | ret = tipc_snprintf(buf, len, "%-10u %-10u ", sseq->lower, sseq->upper); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 784 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 785 | if (depth == 2) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 786 | ret += tipc_snprintf(buf - ret, len + ret, "\n"); |
| 787 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 788 | } |
| 789 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 790 | info = sseq->info; |
| 791 | |
| 792 | list_for_each_entry(publ, &info->zone_list, zone_list) { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 793 | sprintf(portIdStr, "<%u.%u.%u:%u>", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 794 | tipc_zone(publ->node), tipc_cluster(publ->node), |
| 795 | tipc_node(publ->node), publ->ref); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 796 | ret += tipc_snprintf(buf + ret, len - ret, "%-26s ", portIdStr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 797 | if (depth > 3) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 798 | ret += tipc_snprintf(buf + ret, len - ret, "%-10u %s", |
| 799 | publ->key, scope_str[publ->scope]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 800 | } |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 801 | if (!list_is_last(&publ->zone_list, &info->zone_list)) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 802 | ret += tipc_snprintf(buf + ret, len - ret, |
| 803 | "\n%33s", " "); |
Peter Senna Tschudin | adccff3 | 2012-09-18 07:10:45 +0000 | [diff] [blame] | 804 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 805 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 806 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 807 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 811 | * nameseq_list - print specified name sequence contents into the given buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 812 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 813 | static int nameseq_list(struct name_seq *seq, char *buf, int len, u32 depth, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 814 | u32 type, u32 lowbound, u32 upbound, u32 index) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 815 | { |
| 816 | struct sub_seq *sseq; |
| 817 | char typearea[11]; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 818 | int ret = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 819 | |
Allan Stephens | 0f15d36 | 2008-06-04 17:37:59 -0700 | [diff] [blame] | 820 | if (seq->first_free == 0) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 821 | return 0; |
Allan Stephens | 0f15d36 | 2008-06-04 17:37:59 -0700 | [diff] [blame] | 822 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 823 | sprintf(typearea, "%-10u", seq->type); |
| 824 | |
| 825 | if (depth == 1) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 826 | ret += tipc_snprintf(buf, len, "%s\n", typearea); |
| 827 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) { |
| 831 | if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 832 | ret += tipc_snprintf(buf + ret, len - ret, "%s ", |
| 833 | typearea); |
Allan Stephens | 307fdf5 | 2008-06-04 17:38:22 -0700 | [diff] [blame] | 834 | spin_lock_bh(&seq->lock); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 835 | ret += subseq_list(sseq, buf + ret, len - ret, |
| 836 | depth, index); |
Allan Stephens | 307fdf5 | 2008-06-04 17:38:22 -0700 | [diff] [blame] | 837 | spin_unlock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 838 | sprintf(typearea, "%10s", " "); |
| 839 | } |
| 840 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 841 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | /** |
| 845 | * nametbl_header - print name table header into the given buffer |
| 846 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 847 | static int nametbl_header(char *buf, int len, u32 depth) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 848 | { |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 849 | const char *header[] = { |
| 850 | "Type ", |
| 851 | "Lower Upper ", |
| 852 | "Port Identity ", |
| 853 | "Publication Scope" |
| 854 | }; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 855 | |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 856 | int i; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 857 | int ret = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 858 | |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 859 | if (depth > 4) |
| 860 | depth = 4; |
| 861 | for (i = 0; i < depth; i++) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 862 | ret += tipc_snprintf(buf + ret, len - ret, header[i]); |
| 863 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 864 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | /** |
| 868 | * nametbl_list - print specified name table contents into the given buffer |
| 869 | */ |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 870 | static int nametbl_list(struct net *net, char *buf, int len, u32 depth_info, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 871 | u32 type, u32 lowbound, u32 upbound) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 872 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 873 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 874 | struct hlist_head *seq_head; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 875 | struct name_seq *seq; |
| 876 | int all_types; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 877 | int ret = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 878 | u32 depth; |
| 879 | u32 i; |
| 880 | |
| 881 | all_types = (depth_info & TIPC_NTQ_ALLTYPES); |
| 882 | depth = (depth_info & ~TIPC_NTQ_ALLTYPES); |
| 883 | |
| 884 | if (depth == 0) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 885 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 886 | |
| 887 | if (all_types) { |
| 888 | /* display all entries in name table to specified depth */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 889 | ret += nametbl_header(buf, len, depth); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 890 | lowbound = 0; |
| 891 | upbound = ~0; |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 892 | for (i = 0; i < TIPC_NAMETBL_SIZE; i++) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 893 | seq_head = &tn->nametbl->seq_hlist[i]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 894 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 895 | ret += nameseq_list(seq, buf + ret, len - ret, |
| 896 | depth, seq->type, |
| 897 | lowbound, upbound, i); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 898 | } |
| 899 | } |
| 900 | } else { |
| 901 | /* display only the sequence that matches the specified type */ |
| 902 | if (upbound < lowbound) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 903 | ret += tipc_snprintf(buf + ret, len - ret, |
| 904 | "invalid name sequence specified\n"); |
| 905 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 906 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 907 | ret += nametbl_header(buf + ret, len - ret, depth); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 908 | i = hash(type); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 909 | seq_head = &tn->nametbl->seq_hlist[i]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 910 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 911 | if (seq->type == type) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 912 | ret += nameseq_list(seq, buf + ret, len - ret, |
| 913 | depth, type, |
| 914 | lowbound, upbound, i); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 915 | break; |
| 916 | } |
| 917 | } |
| 918 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 919 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 920 | } |
| 921 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 922 | struct sk_buff *tipc_nametbl_get(struct net *net, const void *req_tlv_area, |
| 923 | int req_tlv_space) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 924 | { |
| 925 | struct sk_buff *buf; |
| 926 | struct tipc_name_table_query *argv; |
| 927 | struct tlv_desc *rep_tlv; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 928 | char *pb; |
| 929 | int pb_len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 930 | int str_len; |
| 931 | |
| 932 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NAME_TBL_QUERY)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 933 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 934 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 935 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 936 | if (!buf) |
| 937 | return NULL; |
| 938 | |
| 939 | rep_tlv = (struct tlv_desc *)buf->data; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 940 | pb = TLV_DATA(rep_tlv); |
| 941 | pb_len = ULTRA_STRING_MAX_LEN; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 942 | argv = (struct tipc_name_table_query *)TLV_DATA(req_tlv_area); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 943 | rcu_read_lock(); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 944 | str_len = nametbl_list(net, pb, pb_len, ntohl(argv->depth), |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 945 | ntohl(argv->type), |
| 946 | ntohl(argv->lowbound), ntohl(argv->upbound)); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 947 | rcu_read_unlock(); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 948 | str_len += 1; /* for "\0" */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 949 | skb_put(buf, TLV_SPACE(str_len)); |
| 950 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); |
| 951 | |
| 952 | return buf; |
| 953 | } |
| 954 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 955 | int tipc_nametbl_init(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 956 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 957 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 958 | struct name_table *tipc_nametbl; |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 959 | int i; |
| 960 | |
| 961 | tipc_nametbl = kzalloc(sizeof(*tipc_nametbl), GFP_ATOMIC); |
| 962 | if (!tipc_nametbl) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 963 | return -ENOMEM; |
| 964 | |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 965 | for (i = 0; i < TIPC_NAMETBL_SIZE; i++) |
| 966 | INIT_HLIST_HEAD(&tipc_nametbl->seq_hlist[i]); |
| 967 | |
| 968 | INIT_LIST_HEAD(&tipc_nametbl->publ_list[TIPC_ZONE_SCOPE]); |
| 969 | INIT_LIST_HEAD(&tipc_nametbl->publ_list[TIPC_CLUSTER_SCOPE]); |
| 970 | INIT_LIST_HEAD(&tipc_nametbl->publ_list[TIPC_NODE_SCOPE]); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 971 | tn->nametbl = tipc_nametbl; |
| 972 | spin_lock_init(&tn->nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 973 | return 0; |
| 974 | } |
| 975 | |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 976 | /** |
| 977 | * tipc_purge_publications - remove all publications for a given type |
| 978 | * |
| 979 | * tipc_nametbl_lock must be held when calling this function |
| 980 | */ |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 981 | static void tipc_purge_publications(struct net *net, struct name_seq *seq) |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 982 | { |
| 983 | struct publication *publ, *safe; |
| 984 | struct sub_seq *sseq; |
| 985 | struct name_info *info; |
| 986 | |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 987 | spin_lock_bh(&seq->lock); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 988 | sseq = seq->sseqs; |
| 989 | info = sseq->info; |
| 990 | list_for_each_entry_safe(publ, safe, &info->zone_list, zone_list) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 991 | tipc_nametbl_remove_publ(net, publ->type, publ->lower, |
| 992 | publ->node, publ->ref, publ->key); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 993 | kfree_rcu(publ, rcu); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 994 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 995 | hlist_del_init_rcu(&seq->ns_list); |
| 996 | kfree(seq->sseqs); |
Ying Xue | 023160b | 2014-12-09 15:17:56 +0800 | [diff] [blame] | 997 | spin_unlock_bh(&seq->lock); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 998 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 999 | kfree_rcu(seq, rcu); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 1000 | } |
| 1001 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1002 | void tipc_nametbl_stop(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1003 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1004 | u32 i; |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 1005 | struct name_seq *seq; |
| 1006 | struct hlist_head *seq_head; |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1007 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 1008 | struct name_table *tipc_nametbl = tn->nametbl; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1009 | |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 1010 | /* Verify name table is empty and purge any lingering |
| 1011 | * publications, then release the name table |
| 1012 | */ |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1013 | spin_lock_bh(&tn->nametbl_lock); |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 1014 | for (i = 0; i < TIPC_NAMETBL_SIZE; i++) { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1015 | if (hlist_empty(&tipc_nametbl->seq_hlist[i])) |
Paul Gortmaker | f705ab9 | 2012-07-11 17:35:01 -0400 | [diff] [blame] | 1016 | continue; |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1017 | seq_head = &tipc_nametbl->seq_hlist[i]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1018 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1019 | tipc_purge_publications(net, seq); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 1020 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1021 | } |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1022 | spin_unlock_bh(&tn->nametbl_lock); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1023 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1024 | synchronize_net(); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1025 | kfree(tipc_nametbl); |
| 1026 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1027 | } |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1028 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1029 | static int __tipc_nl_add_nametable_publ(struct tipc_nl_msg *msg, |
| 1030 | struct name_seq *seq, |
| 1031 | struct sub_seq *sseq, u32 *last_publ) |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1032 | { |
| 1033 | void *hdr; |
| 1034 | struct nlattr *attrs; |
| 1035 | struct nlattr *publ; |
| 1036 | struct publication *p; |
| 1037 | |
| 1038 | if (*last_publ) { |
| 1039 | list_for_each_entry(p, &sseq->info->zone_list, zone_list) |
| 1040 | if (p->key == *last_publ) |
| 1041 | break; |
| 1042 | if (p->key != *last_publ) |
| 1043 | return -EPIPE; |
| 1044 | } else { |
| 1045 | p = list_first_entry(&sseq->info->zone_list, struct publication, |
| 1046 | zone_list); |
| 1047 | } |
| 1048 | |
| 1049 | list_for_each_entry_from(p, &sseq->info->zone_list, zone_list) { |
| 1050 | *last_publ = p->key; |
| 1051 | |
| 1052 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, |
| 1053 | &tipc_genl_v2_family, NLM_F_MULTI, |
| 1054 | TIPC_NL_NAME_TABLE_GET); |
| 1055 | if (!hdr) |
| 1056 | return -EMSGSIZE; |
| 1057 | |
| 1058 | attrs = nla_nest_start(msg->skb, TIPC_NLA_NAME_TABLE); |
| 1059 | if (!attrs) |
| 1060 | goto msg_full; |
| 1061 | |
| 1062 | publ = nla_nest_start(msg->skb, TIPC_NLA_NAME_TABLE_PUBL); |
| 1063 | if (!publ) |
| 1064 | goto attr_msg_full; |
| 1065 | |
| 1066 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_TYPE, seq->type)) |
| 1067 | goto publ_msg_full; |
| 1068 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_LOWER, sseq->lower)) |
| 1069 | goto publ_msg_full; |
| 1070 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_UPPER, sseq->upper)) |
| 1071 | goto publ_msg_full; |
| 1072 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_SCOPE, p->scope)) |
| 1073 | goto publ_msg_full; |
| 1074 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_NODE, p->node)) |
| 1075 | goto publ_msg_full; |
| 1076 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_REF, p->ref)) |
| 1077 | goto publ_msg_full; |
| 1078 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_KEY, p->key)) |
| 1079 | goto publ_msg_full; |
| 1080 | |
| 1081 | nla_nest_end(msg->skb, publ); |
| 1082 | nla_nest_end(msg->skb, attrs); |
| 1083 | genlmsg_end(msg->skb, hdr); |
| 1084 | } |
| 1085 | *last_publ = 0; |
| 1086 | |
| 1087 | return 0; |
| 1088 | |
| 1089 | publ_msg_full: |
| 1090 | nla_nest_cancel(msg->skb, publ); |
| 1091 | attr_msg_full: |
| 1092 | nla_nest_cancel(msg->skb, attrs); |
| 1093 | msg_full: |
| 1094 | genlmsg_cancel(msg->skb, hdr); |
| 1095 | |
| 1096 | return -EMSGSIZE; |
| 1097 | } |
| 1098 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1099 | static int __tipc_nl_subseq_list(struct tipc_nl_msg *msg, struct name_seq *seq, |
| 1100 | u32 *last_lower, u32 *last_publ) |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1101 | { |
| 1102 | struct sub_seq *sseq; |
| 1103 | struct sub_seq *sseq_start; |
| 1104 | int err; |
| 1105 | |
| 1106 | if (*last_lower) { |
| 1107 | sseq_start = nameseq_find_subseq(seq, *last_lower); |
| 1108 | if (!sseq_start) |
| 1109 | return -EPIPE; |
| 1110 | } else { |
| 1111 | sseq_start = seq->sseqs; |
| 1112 | } |
| 1113 | |
| 1114 | for (sseq = sseq_start; sseq != &seq->sseqs[seq->first_free]; sseq++) { |
| 1115 | err = __tipc_nl_add_nametable_publ(msg, seq, sseq, last_publ); |
| 1116 | if (err) { |
| 1117 | *last_lower = sseq->lower; |
| 1118 | return err; |
| 1119 | } |
| 1120 | } |
| 1121 | *last_lower = 0; |
| 1122 | |
| 1123 | return 0; |
| 1124 | } |
| 1125 | |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1126 | static int tipc_nl_seq_list(struct net *net, struct tipc_nl_msg *msg, |
| 1127 | u32 *last_type, u32 *last_lower, u32 *last_publ) |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1128 | { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1129 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1130 | struct hlist_head *seq_head; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1131 | struct name_seq *seq = NULL; |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1132 | int err; |
| 1133 | int i; |
| 1134 | |
| 1135 | if (*last_type) |
| 1136 | i = hash(*last_type); |
| 1137 | else |
| 1138 | i = 0; |
| 1139 | |
| 1140 | for (; i < TIPC_NAMETBL_SIZE; i++) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1141 | seq_head = &tn->nametbl->seq_hlist[i]; |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1142 | |
| 1143 | if (*last_type) { |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1144 | seq = nametbl_find_seq(net, *last_type); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1145 | if (!seq) |
| 1146 | return -EPIPE; |
| 1147 | } else { |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1148 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) |
| 1149 | break; |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1150 | if (!seq) |
| 1151 | continue; |
| 1152 | } |
| 1153 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1154 | hlist_for_each_entry_from_rcu(seq, ns_list) { |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1155 | spin_lock_bh(&seq->lock); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1156 | err = __tipc_nl_subseq_list(msg, seq, last_lower, |
| 1157 | last_publ); |
| 1158 | |
| 1159 | if (err) { |
| 1160 | *last_type = seq->type; |
| 1161 | spin_unlock_bh(&seq->lock); |
| 1162 | return err; |
| 1163 | } |
| 1164 | spin_unlock_bh(&seq->lock); |
| 1165 | } |
| 1166 | *last_type = 0; |
| 1167 | } |
| 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 1172 | { |
| 1173 | int err; |
| 1174 | int done = cb->args[3]; |
| 1175 | u32 last_type = cb->args[0]; |
| 1176 | u32 last_lower = cb->args[1]; |
| 1177 | u32 last_publ = cb->args[2]; |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1178 | struct net *net = sock_net(skb->sk); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1179 | struct tipc_nl_msg msg; |
| 1180 | |
| 1181 | if (done) |
| 1182 | return 0; |
| 1183 | |
| 1184 | msg.skb = skb; |
| 1185 | msg.portid = NETLINK_CB(cb->skb).portid; |
| 1186 | msg.seq = cb->nlh->nlmsg_seq; |
| 1187 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1188 | rcu_read_lock(); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame^] | 1189 | err = tipc_nl_seq_list(net, &msg, &last_type, &last_lower, &last_publ); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1190 | if (!err) { |
| 1191 | done = 1; |
| 1192 | } else if (err != -EMSGSIZE) { |
| 1193 | /* We never set seq or call nl_dump_check_consistent() this |
| 1194 | * means that setting prev_seq here will cause the consistence |
| 1195 | * check to fail in the netlink callback handler. Resulting in |
| 1196 | * the NLMSG_DONE message having the NLM_F_DUMP_INTR flag set if |
| 1197 | * we got an error. |
| 1198 | */ |
| 1199 | cb->prev_seq = 1; |
| 1200 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1201 | rcu_read_unlock(); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1202 | |
| 1203 | cb->args[0] = last_type; |
| 1204 | cb->args[1] = last_lower; |
| 1205 | cb->args[2] = last_publ; |
| 1206 | cb->args[3] = done; |
| 1207 | |
| 1208 | return skb->len; |
| 1209 | } |