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 | |
| 37 | #include "core.h" |
| 38 | #include "config.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "name_table.h" |
| 40 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | #include "subscr.h" |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame^] | 42 | #include "bcast.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 43 | |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 44 | #define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 46 | static const struct nla_policy |
| 47 | tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = { |
| 48 | [TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC }, |
| 49 | [TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED } |
| 50 | }; |
| 51 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 52 | /** |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 53 | * struct name_info - name sequence publication info |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 54 | * @node_list: circular list of publications made by own node |
| 55 | * @cluster_list: circular list of publications made by own cluster |
| 56 | * @zone_list: circular list of publications made by own zone |
| 57 | * @node_list_size: number of entries in "node_list" |
| 58 | * @cluster_list_size: number of entries in "cluster_list" |
| 59 | * @zone_list_size: number of entries in "zone_list" |
| 60 | * |
| 61 | * Note: The zone list always contains at least one entry, since all |
| 62 | * publications of the associated name sequence belong to it. |
| 63 | * (The cluster and node lists may be empty.) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 64 | */ |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 65 | struct name_info { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 66 | struct list_head node_list; |
| 67 | struct list_head cluster_list; |
| 68 | struct list_head zone_list; |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 69 | u32 node_list_size; |
| 70 | u32 cluster_list_size; |
| 71 | u32 zone_list_size; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 72 | }; |
| 73 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 74 | /** |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 75 | * struct sub_seq - container for all published instances of a name sequence |
| 76 | * @lower: name sequence lower bound |
| 77 | * @upper: name sequence upper bound |
| 78 | * @info: pointer to name sequence publication info |
| 79 | */ |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 80 | struct sub_seq { |
| 81 | u32 lower; |
| 82 | u32 upper; |
| 83 | struct name_info *info; |
| 84 | }; |
| 85 | |
| 86 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 87 | * struct name_seq - container for all published instances of a name type |
| 88 | * @type: 32 bit 'type' value for name sequence |
| 89 | * @sseq: pointer to dynamically-sized array of sub-sequences of this 'type'; |
| 90 | * sub-sequences are sorted in ascending order |
| 91 | * @alloc: number of sub-sequences currently in array |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 92 | * @first_free: array index of first unused sub-sequence entry |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 93 | * @ns_list: links to adjacent name sequences in hash chain |
| 94 | * @subscriptions: list of subscriptions for this 'type' |
Allan Stephens | 307fdf5 | 2008-06-04 17:38:22 -0700 | [diff] [blame] | 95 | * @lock: spinlock controlling access to publication lists of all sub-sequences |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 96 | * @rcu: RCU callback head used for deferred freeing |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 97 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 98 | struct name_seq { |
| 99 | u32 type; |
| 100 | struct sub_seq *sseqs; |
| 101 | u32 alloc; |
| 102 | u32 first_free; |
| 103 | struct hlist_node ns_list; |
| 104 | struct list_head subscriptions; |
| 105 | spinlock_t lock; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 106 | struct rcu_head rcu; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 107 | }; |
| 108 | |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 109 | struct name_table *tipc_nametbl; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 110 | DEFINE_SPINLOCK(tipc_nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 111 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 112 | static int hash(int x) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 113 | { |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 114 | return x & (TIPC_NAMETBL_SIZE - 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | /** |
| 118 | * publ_create - create a publication structure |
| 119 | */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 120 | static struct publication *publ_create(u32 type, u32 lower, u32 upper, |
| 121 | u32 scope, u32 node, u32 port_ref, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | u32 key) |
| 123 | { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 124 | struct publication *publ = kzalloc(sizeof(*publ), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | if (publ == NULL) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 126 | pr_warn("Publication creation failure, no memory\n"); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 127 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 128 | } |
| 129 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 130 | publ->type = type; |
| 131 | publ->lower = lower; |
| 132 | publ->upper = upper; |
| 133 | publ->scope = scope; |
| 134 | publ->node = node; |
| 135 | publ->ref = port_ref; |
| 136 | publ->key = key; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 137 | INIT_LIST_HEAD(&publ->pport_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 138 | return publ; |
| 139 | } |
| 140 | |
| 141 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 142 | * tipc_subseq_alloc - allocate a specified number of sub-sequence structures |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 143 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 144 | static struct sub_seq *tipc_subseq_alloc(u32 cnt) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 145 | { |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 146 | return kcalloc(cnt, sizeof(struct sub_seq), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 150 | * tipc_nameseq_create - create a name sequence structure for the specified 'type' |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 151 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 152 | * Allocates a single sub-sequence structure and sets it to all 0's. |
| 153 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 154 | 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] | 155 | { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 156 | struct name_seq *nseq = kzalloc(sizeof(*nseq), GFP_ATOMIC); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 157 | struct sub_seq *sseq = tipc_subseq_alloc(1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 158 | |
| 159 | if (!nseq || !sseq) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 160 | pr_warn("Name sequence creation failed, no memory\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 161 | kfree(nseq); |
| 162 | kfree(sseq); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 163 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 164 | } |
| 165 | |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 166 | spin_lock_init(&nseq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 167 | nseq->type = type; |
| 168 | nseq->sseqs = sseq; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 169 | nseq->alloc = 1; |
| 170 | INIT_HLIST_NODE(&nseq->ns_list); |
| 171 | INIT_LIST_HEAD(&nseq->subscriptions); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 172 | hlist_add_head_rcu(&nseq->ns_list, seq_head); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 173 | return nseq; |
| 174 | } |
| 175 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 176 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 177 | * nameseq_find_subseq - find sub-sequence (if any) matching a name instance |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 178 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 179 | * Very time-critical, so binary searches through sub-sequence array. |
| 180 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 181 | static struct sub_seq *nameseq_find_subseq(struct name_seq *nseq, |
| 182 | u32 instance) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 183 | { |
| 184 | struct sub_seq *sseqs = nseq->sseqs; |
| 185 | int low = 0; |
| 186 | int high = nseq->first_free - 1; |
| 187 | int mid; |
| 188 | |
| 189 | while (low <= high) { |
| 190 | mid = (low + high) / 2; |
| 191 | if (instance < sseqs[mid].lower) |
| 192 | high = mid - 1; |
| 193 | else if (instance > sseqs[mid].upper) |
| 194 | low = mid + 1; |
| 195 | else |
| 196 | return &sseqs[mid]; |
| 197 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 198 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | /** |
| 202 | * nameseq_locate_subseq - determine position of name instance in sub-sequence |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 203 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | * Returns index in sub-sequence array of the entry that contains the specified |
| 205 | * instance value; if no entry contains that value, returns the position |
| 206 | * where a new entry for it would be inserted in the array. |
| 207 | * |
| 208 | * Note: Similar to binary search code for locating a sub-sequence. |
| 209 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 210 | static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance) |
| 211 | { |
| 212 | struct sub_seq *sseqs = nseq->sseqs; |
| 213 | int low = 0; |
| 214 | int high = nseq->first_free - 1; |
| 215 | int mid; |
| 216 | |
| 217 | while (low <= high) { |
| 218 | mid = (low + high) / 2; |
| 219 | if (instance < sseqs[mid].lower) |
| 220 | high = mid - 1; |
| 221 | else if (instance > sseqs[mid].upper) |
| 222 | low = mid + 1; |
| 223 | else |
| 224 | return mid; |
| 225 | } |
| 226 | return low; |
| 227 | } |
| 228 | |
| 229 | /** |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 230 | * tipc_nameseq_insert_publ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 231 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 232 | static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq, |
| 233 | u32 type, u32 lower, u32 upper, |
| 234 | u32 scope, u32 node, u32 port, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 235 | { |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 236 | struct tipc_subscription *s; |
| 237 | struct tipc_subscription *st; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 238 | struct publication *publ; |
| 239 | struct sub_seq *sseq; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 240 | struct name_info *info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 241 | int created_subseq = 0; |
| 242 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 243 | sseq = nameseq_find_subseq(nseq, lower); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 244 | if (sseq) { |
| 245 | |
| 246 | /* Lower end overlaps existing entry => need an exact match */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 247 | if ((sseq->lower != lower) || (sseq->upper != upper)) { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 248 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 249 | } |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 250 | |
| 251 | info = sseq->info; |
Allan Stephens | f80c24d | 2011-11-03 11:12:01 -0400 | [diff] [blame] | 252 | |
| 253 | /* Check if an identical publication already exists */ |
| 254 | list_for_each_entry(publ, &info->zone_list, zone_list) { |
| 255 | if ((publ->ref == port) && (publ->key == key) && |
| 256 | (!publ->node || (publ->node == node))) |
| 257 | return NULL; |
| 258 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 259 | } else { |
| 260 | u32 inspos; |
| 261 | struct sub_seq *freesseq; |
| 262 | |
| 263 | /* Find where lower end should be inserted */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 264 | inspos = nameseq_locate_subseq(nseq, lower); |
| 265 | |
| 266 | /* Fail if upper end overlaps into an existing entry */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 267 | if ((inspos < nseq->first_free) && |
| 268 | (upper >= nseq->sseqs[inspos].lower)) { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 269 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | /* Ensure there is space for new sub-sequence */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 273 | if (nseq->first_free == nseq->alloc) { |
Allan Stephens | 9ab230f | 2006-06-25 23:37:24 -0700 | [diff] [blame] | 274 | struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2); |
| 275 | |
| 276 | if (!sseqs) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 277 | pr_warn("Cannot publish {%u,%u,%u}, no memory\n", |
| 278 | type, lower, upper); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 279 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 280 | } |
Allan Stephens | 9ab230f | 2006-06-25 23:37:24 -0700 | [diff] [blame] | 281 | memcpy(sseqs, nseq->sseqs, |
| 282 | nseq->alloc * sizeof(struct sub_seq)); |
| 283 | kfree(nseq->sseqs); |
| 284 | nseq->sseqs = sseqs; |
| 285 | nseq->alloc *= 2; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 286 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 287 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 288 | info = kzalloc(sizeof(*info), GFP_ATOMIC); |
| 289 | if (!info) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 290 | pr_warn("Cannot publish {%u,%u,%u}, no memory\n", |
| 291 | type, lower, upper); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 292 | return NULL; |
| 293 | } |
| 294 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 295 | INIT_LIST_HEAD(&info->node_list); |
| 296 | INIT_LIST_HEAD(&info->cluster_list); |
| 297 | INIT_LIST_HEAD(&info->zone_list); |
| 298 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 299 | /* Insert new sub-sequence */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 300 | sseq = &nseq->sseqs[inspos]; |
| 301 | freesseq = &nseq->sseqs[nseq->first_free]; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 302 | memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof(*sseq)); |
| 303 | memset(sseq, 0, sizeof(*sseq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 304 | nseq->first_free++; |
| 305 | sseq->lower = lower; |
| 306 | sseq->upper = upper; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 307 | sseq->info = info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 308 | created_subseq = 1; |
| 309 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 310 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 311 | /* Insert a publication */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 312 | publ = publ_create(type, lower, upper, scope, node, port, key); |
| 313 | if (!publ) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 314 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 315 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 316 | list_add(&publ->zone_list, &info->zone_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 317 | info->zone_list_size++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 318 | |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 319 | if (in_own_cluster(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 320 | list_add(&publ->cluster_list, &info->cluster_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 321 | info->cluster_list_size++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 322 | } |
| 323 | |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 324 | if (in_own_node(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 325 | list_add(&publ->node_list, &info->node_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 326 | info->node_list_size++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 327 | } |
| 328 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 329 | /* Any subscriptions waiting for notification? */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 330 | list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 331 | tipc_subscr_report_overlap(s, |
| 332 | publ->lower, |
| 333 | publ->upper, |
| 334 | TIPC_PUBLISHED, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 335 | publ->ref, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 336 | publ->node, |
| 337 | created_subseq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 338 | } |
| 339 | return publ; |
| 340 | } |
| 341 | |
| 342 | /** |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 343 | * tipc_nameseq_remove_publ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 344 | * |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 345 | * NOTE: There may be cases where TIPC is asked to remove a publication |
| 346 | * that is not in the name table. For example, if another node issues a |
| 347 | * publication for a name sequence that overlaps an existing name sequence |
| 348 | * the publication will not be recorded, which means the publication won't |
| 349 | * be found when the name sequence is later withdrawn by that node. |
| 350 | * A failed withdraw request simply returns a failure indication and lets the |
| 351 | * caller issue any error or warning messages associated with such a problem. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 352 | */ |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 353 | static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst, |
| 354 | u32 node, u32 ref, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 355 | { |
| 356 | struct publication *publ; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 357 | struct sub_seq *sseq = nameseq_find_subseq(nseq, inst); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 358 | struct name_info *info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 359 | struct sub_seq *free; |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 360 | struct tipc_subscription *s, *st; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 361 | int removed_subseq = 0; |
| 362 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 363 | if (!sseq) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 364 | return NULL; |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 365 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 366 | info = sseq->info; |
| 367 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 368 | /* Locate publication, if it exists */ |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 369 | list_for_each_entry(publ, &info->zone_list, zone_list) { |
| 370 | if ((publ->key == key) && (publ->ref == ref) && |
| 371 | (!publ->node || (publ->node == node))) |
| 372 | goto found; |
| 373 | } |
| 374 | return NULL; |
| 375 | |
| 376 | found: |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 377 | /* Remove publication from zone scope list */ |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 378 | list_del(&publ->zone_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 379 | info->zone_list_size--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 380 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 381 | /* Remove publication from cluster scope list, if present */ |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 382 | if (in_own_cluster(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 383 | list_del(&publ->cluster_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 384 | info->cluster_list_size--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 385 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 386 | |
| 387 | /* Remove publication from node scope list, if present */ |
Allan Stephens | d4f5c12 | 2012-04-17 18:16:34 -0400 | [diff] [blame] | 388 | if (in_own_node(node)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 389 | list_del(&publ->node_list); |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 390 | info->node_list_size--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 391 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 393 | /* Contract subseq list if no more publications for that subseq */ |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 394 | if (list_empty(&info->zone_list)) { |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 395 | kfree(info); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | free = &nseq->sseqs[nseq->first_free--]; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 397 | memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof(*sseq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 398 | removed_subseq = 1; |
| 399 | } |
| 400 | |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 401 | /* Notify any waiting subscriptions */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 402 | list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 403 | tipc_subscr_report_overlap(s, |
| 404 | publ->lower, |
| 405 | publ->upper, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 406 | TIPC_WITHDRAWN, |
| 407 | publ->ref, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 408 | publ->node, |
| 409 | removed_subseq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 410 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 411 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 412 | return publ; |
| 413 | } |
| 414 | |
| 415 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 416 | * tipc_nameseq_subscribe - attach a subscription, and issue |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 417 | * the prescribed number of events if there is any sub- |
| 418 | * sequence overlapping with the requested sequence |
| 419 | */ |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 420 | static void tipc_nameseq_subscribe(struct name_seq *nseq, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 421 | struct tipc_subscription *s) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 422 | { |
| 423 | struct sub_seq *sseq = nseq->sseqs; |
| 424 | |
| 425 | list_add(&s->nameseq_list, &nseq->subscriptions); |
| 426 | |
| 427 | if (!sseq) |
| 428 | return; |
| 429 | |
| 430 | while (sseq != &nseq->sseqs[nseq->first_free]) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 431 | if (tipc_subscr_overlap(s, sseq->lower, sseq->upper)) { |
| 432 | struct publication *crs; |
| 433 | struct name_info *info = sseq->info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 434 | int must_report = 1; |
| 435 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 436 | list_for_each_entry(crs, &info->zone_list, zone_list) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 437 | tipc_subscr_report_overlap(s, |
| 438 | sseq->lower, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 439 | sseq->upper, |
| 440 | TIPC_PUBLISHED, |
| 441 | crs->ref, |
| 442 | crs->node, |
| 443 | must_report); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 444 | must_report = 0; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 445 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 446 | } |
| 447 | sseq++; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | static struct name_seq *nametbl_find_seq(u32 type) |
| 452 | { |
| 453 | struct hlist_head *seq_head; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 454 | struct name_seq *ns; |
| 455 | |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 456 | seq_head = &tipc_nametbl->seq_hlist[hash(type)]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 457 | hlist_for_each_entry_rcu(ns, seq_head, ns_list) { |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 458 | if (ns->type == type) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 459 | return ns; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 460 | } |
| 461 | |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 462 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 463 | }; |
| 464 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 465 | struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper, |
| 466 | u32 scope, u32 node, u32 port, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 467 | { |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 468 | struct publication *publ; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 469 | struct name_seq *seq = nametbl_find_seq(type); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 470 | int index = hash(type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 471 | |
Allan Stephens | 8f17789 | 2012-04-26 17:57:17 -0400 | [diff] [blame] | 472 | if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE) || |
| 473 | (lower > upper)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 474 | pr_debug("Failed to publish illegal {%u,%u,%u} with scope %u\n", |
| 475 | type, lower, upper, scope); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 476 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 477 | } |
| 478 | |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 479 | if (!seq) |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 480 | seq = tipc_nameseq_create(type, |
| 481 | &tipc_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 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 492 | struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 493 | u32 node, u32 ref, u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 494 | { |
| 495 | struct publication *publ; |
| 496 | struct name_seq *seq = nametbl_find_seq(type); |
| 497 | |
| 498 | if (!seq) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 499 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 501 | spin_lock_bh(&seq->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 502 | publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 503 | if (!seq->first_free && list_empty(&seq->subscriptions)) { |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 504 | hlist_del_init_rcu(&seq->ns_list); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 505 | kfree(seq->sseqs); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 506 | spin_unlock_bh(&seq->lock); |
| 507 | kfree_rcu(seq, rcu); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 508 | return publ; |
| 509 | } |
| 510 | spin_unlock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 511 | return publ; |
| 512 | } |
| 513 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 514 | /** |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 515 | * tipc_nametbl_translate - perform name translation |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 516 | * |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 517 | * On entry, 'destnode' is the search domain used during translation. |
| 518 | * |
| 519 | * On exit: |
| 520 | * - if name translation is deferred to another node/cluster/zone, |
| 521 | * leaves 'destnode' unchanged (will be non-zero) and returns 0 |
| 522 | * - if name translation is attempted and succeeds, sets 'destnode' |
| 523 | * to publishing node and returns port reference (will be non-zero) |
| 524 | * - if name translation is attempted and fails, sets 'destnode' to 0 |
| 525 | * and returns 0 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 526 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 527 | u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 528 | { |
| 529 | struct sub_seq *sseq; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 530 | struct name_info *info; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 531 | struct publication *publ; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 532 | struct name_seq *seq; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 533 | u32 ref = 0; |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 534 | u32 node = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 535 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 536 | if (!tipc_in_scope(*destnode, tipc_own_addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | return 0; |
| 538 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 539 | rcu_read_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 540 | seq = nametbl_find_seq(type); |
| 541 | if (unlikely(!seq)) |
| 542 | goto not_found; |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 543 | spin_lock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 544 | sseq = nameseq_find_subseq(seq, instance); |
| 545 | if (unlikely(!sseq)) |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 546 | goto no_match; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 547 | info = sseq->info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 548 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 549 | /* Closest-First Algorithm */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | if (likely(!*destnode)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 551 | if (!list_empty(&info->node_list)) { |
| 552 | publ = list_first_entry(&info->node_list, |
| 553 | struct publication, |
| 554 | node_list); |
| 555 | list_move_tail(&publ->node_list, |
| 556 | &info->node_list); |
| 557 | } else if (!list_empty(&info->cluster_list)) { |
| 558 | publ = list_first_entry(&info->cluster_list, |
| 559 | struct publication, |
| 560 | cluster_list); |
| 561 | list_move_tail(&publ->cluster_list, |
| 562 | &info->cluster_list); |
Allan Stephens | 8af4638 | 2011-05-30 11:27:50 -0400 | [diff] [blame] | 563 | } else { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 564 | publ = list_first_entry(&info->zone_list, |
| 565 | struct publication, |
| 566 | zone_list); |
| 567 | list_move_tail(&publ->zone_list, |
| 568 | &info->zone_list); |
Allan Stephens | 8af4638 | 2011-05-30 11:27:50 -0400 | [diff] [blame] | 569 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 570 | } |
| 571 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 572 | /* Round-Robin Algorithm */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 573 | else if (*destnode == tipc_own_addr) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 574 | if (list_empty(&info->node_list)) |
| 575 | goto no_match; |
| 576 | publ = list_first_entry(&info->node_list, struct publication, |
| 577 | node_list); |
| 578 | list_move_tail(&publ->node_list, &info->node_list); |
Allan Stephens | 336ebf5 | 2012-04-17 18:02:01 -0400 | [diff] [blame] | 579 | } else if (in_own_cluster_exact(*destnode)) { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 580 | if (list_empty(&info->cluster_list)) |
| 581 | goto no_match; |
| 582 | publ = list_first_entry(&info->cluster_list, struct publication, |
| 583 | cluster_list); |
| 584 | list_move_tail(&publ->cluster_list, &info->cluster_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 585 | } else { |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 586 | publ = list_first_entry(&info->zone_list, struct publication, |
| 587 | zone_list); |
| 588 | list_move_tail(&publ->zone_list, &info->zone_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 589 | } |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 590 | |
| 591 | ref = publ->ref; |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 592 | node = publ->node; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 593 | no_match: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 594 | spin_unlock_bh(&seq->lock); |
| 595 | not_found: |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 596 | rcu_read_unlock(); |
Allan Stephens | bc9f814 | 2011-11-07 17:00:54 -0500 | [diff] [blame] | 597 | *destnode = node; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 598 | return ref; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 602 | * tipc_nametbl_mc_translate - find multicast destinations |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 603 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 604 | * Creates list of all local ports that overlap the given multicast address; |
| 605 | * also determines if any off-node ports overlap. |
| 606 | * |
| 607 | * Note: Publications with a scope narrower than 'limit' are ignored. |
| 608 | * (i.e. local node-scope publications mustn't receive messages arriving |
| 609 | * from another node, even if the multcast link brought it here) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 610 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 611 | * Returns non-zero if any off-node ports overlap |
| 612 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 613 | int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit, |
Paul Gortmaker | 4584310 | 2011-12-29 20:33:30 -0500 | [diff] [blame] | 614 | struct tipc_port_list *dports) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 615 | { |
| 616 | struct name_seq *seq; |
| 617 | struct sub_seq *sseq; |
| 618 | struct sub_seq *sseq_stop; |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 619 | struct name_info *info; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 620 | int res = 0; |
| 621 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 622 | rcu_read_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 623 | seq = nametbl_find_seq(type); |
| 624 | if (!seq) |
| 625 | goto exit; |
| 626 | |
| 627 | spin_lock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 628 | sseq = seq->sseqs + nameseq_locate_subseq(seq, lower); |
| 629 | sseq_stop = seq->sseqs + seq->first_free; |
| 630 | for (; sseq != sseq_stop; sseq++) { |
| 631 | struct publication *publ; |
| 632 | |
| 633 | if (sseq->lower > upper) |
| 634 | break; |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 635 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 636 | info = sseq->info; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 637 | list_for_each_entry(publ, &info->node_list, node_list) { |
| 638 | if (publ->scope <= limit) |
| 639 | tipc_port_list_add(dports, publ->ref); |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 640 | } |
| 641 | |
Allan Stephens | b52124a | 2011-05-30 09:44:38 -0400 | [diff] [blame] | 642 | if (info->cluster_list_size != info->node_list_size) |
Allan Stephens | 968edbe | 2008-07-14 22:45:33 -0700 | [diff] [blame] | 643 | res = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 644 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 645 | spin_unlock_bh(&seq->lock); |
| 646 | exit: |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 647 | rcu_read_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 648 | return res; |
| 649 | } |
| 650 | |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 651 | /* |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 652 | * tipc_nametbl_publish - add name publication to network name tables |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 653 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 654 | struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower, |
| 655 | u32 upper, u32 scope, u32 port_ref, |
| 656 | u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 657 | { |
| 658 | struct publication *publ; |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 659 | struct sk_buff *buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 660 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 661 | spin_lock_bh(&tipc_nametbl_lock); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 662 | if (tipc_nametbl->local_publ_count >= TIPC_MAX_PUBLICATIONS) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 663 | pr_warn("Publication failed, local publication limit reached (%u)\n", |
Ying Xue | e6a04b1 | 2012-08-16 12:09:14 +0000 | [diff] [blame] | 664 | TIPC_MAX_PUBLICATIONS); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 665 | spin_unlock_bh(&tipc_nametbl_lock); |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 666 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 667 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 668 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 669 | publ = tipc_nametbl_insert_publ(type, lower, upper, scope, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 670 | tipc_own_addr, port_ref, key); |
Allan Stephens | fd6eced | 2011-11-09 14:22:52 -0500 | [diff] [blame] | 671 | if (likely(publ)) { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 672 | tipc_nametbl->local_publ_count++; |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 673 | buf = tipc_named_publish(publ); |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 674 | /* Any pending external events? */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 675 | tipc_named_process_backlog(net); |
Allan Stephens | fd6eced | 2011-11-09 14:22:52 -0500 | [diff] [blame] | 676 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 677 | spin_unlock_bh(&tipc_nametbl_lock); |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 678 | |
| 679 | if (buf) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 680 | named_cluster_distribute(net, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 681 | return publ; |
| 682 | } |
| 683 | |
| 684 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 685 | * tipc_nametbl_withdraw - withdraw name publication from network name tables |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 686 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 687 | int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower, u32 ref, |
| 688 | u32 key) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 689 | { |
| 690 | struct publication *publ; |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 691 | struct sk_buff *skb = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 692 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 693 | spin_lock_bh(&tipc_nametbl_lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 694 | publ = tipc_nametbl_remove_publ(type, lower, tipc_own_addr, ref, key); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 695 | if (likely(publ)) { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 696 | tipc_nametbl->local_publ_count--; |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 697 | skb = tipc_named_withdraw(publ); |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 698 | /* Any pending external events? */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 699 | tipc_named_process_backlog(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 700 | list_del_init(&publ->pport_list); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 701 | kfree_rcu(publ, rcu); |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 702 | } else { |
| 703 | pr_err("Unable to remove local publication\n" |
| 704 | "(type=%u, lower=%u, ref=%u, key=%u)\n", |
| 705 | type, lower, ref, key); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 706 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 707 | spin_unlock_bh(&tipc_nametbl_lock); |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 708 | |
| 709 | if (skb) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 710 | named_cluster_distribute(net, skb); |
Ying Xue | 5492390 | 2014-12-02 15:00:28 +0800 | [diff] [blame] | 711 | return 1; |
| 712 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 713 | return 0; |
| 714 | } |
| 715 | |
| 716 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 717 | * tipc_nametbl_subscribe - add a subscription object to the name table |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 718 | */ |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 719 | void tipc_nametbl_subscribe(struct tipc_subscription *s) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 720 | { |
| 721 | u32 type = s->seq.type; |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 722 | int index = hash(type); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 723 | struct name_seq *seq; |
| 724 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 725 | spin_lock_bh(&tipc_nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 726 | seq = nametbl_find_seq(type); |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 727 | if (!seq) |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 728 | seq = tipc_nameseq_create(type, |
| 729 | &tipc_nametbl->seq_hlist[index]); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 730 | if (seq) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 731 | spin_lock_bh(&seq->lock); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 732 | tipc_nameseq_subscribe(seq, s); |
| 733 | spin_unlock_bh(&seq->lock); |
| 734 | } else { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 735 | pr_warn("Failed to create subscription for {%u,%u,%u}\n", |
| 736 | s->seq.type, s->seq.lower, s->seq.upper); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 737 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 738 | spin_unlock_bh(&tipc_nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 739 | } |
| 740 | |
| 741 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 742 | * tipc_nametbl_unsubscribe - remove a subscription object from name table |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 743 | */ |
Paul Gortmaker | fead390 | 2011-12-29 20:43:44 -0500 | [diff] [blame] | 744 | void tipc_nametbl_unsubscribe(struct tipc_subscription *s) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 745 | { |
| 746 | struct name_seq *seq; |
| 747 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 748 | spin_lock_bh(&tipc_nametbl_lock); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 749 | seq = nametbl_find_seq(s->seq.type); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 750 | if (seq != NULL) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 751 | spin_lock_bh(&seq->lock); |
| 752 | list_del_init(&s->nameseq_list); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 753 | if (!seq->first_free && list_empty(&seq->subscriptions)) { |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 754 | hlist_del_init_rcu(&seq->ns_list); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 755 | kfree(seq->sseqs); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 756 | spin_unlock_bh(&seq->lock); |
| 757 | kfree_rcu(seq, rcu); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 758 | } else { |
| 759 | spin_unlock_bh(&seq->lock); |
| 760 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 761 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 762 | spin_unlock_bh(&tipc_nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 763 | } |
| 764 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 765 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 766 | * subseq_list - print specified sub-sequence contents into the given buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 767 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 768 | 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] | 769 | u32 index) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 770 | { |
| 771 | char portIdStr[27]; |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 772 | const char *scope_str[] = {"", " zone", " cluster", " node"}; |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 773 | struct publication *publ; |
| 774 | struct name_info *info; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 775 | int ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 776 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 777 | ret = tipc_snprintf(buf, len, "%-10u %-10u ", sseq->lower, sseq->upper); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 778 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 779 | if (depth == 2) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 780 | ret += tipc_snprintf(buf - ret, len + ret, "\n"); |
| 781 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 782 | } |
| 783 | |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 784 | info = sseq->info; |
| 785 | |
| 786 | list_for_each_entry(publ, &info->zone_list, zone_list) { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 787 | sprintf(portIdStr, "<%u.%u.%u:%u>", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 788 | tipc_zone(publ->node), tipc_cluster(publ->node), |
| 789 | tipc_node(publ->node), publ->ref); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 790 | ret += tipc_snprintf(buf + ret, len - ret, "%-26s ", portIdStr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 791 | if (depth > 3) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 792 | ret += tipc_snprintf(buf + ret, len - ret, "%-10u %s", |
| 793 | publ->key, scope_str[publ->scope]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 794 | } |
Allan Stephens | f6f0a4d | 2011-05-30 10:48:48 -0400 | [diff] [blame] | 795 | if (!list_is_last(&publ->zone_list, &info->zone_list)) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 796 | ret += tipc_snprintf(buf + ret, len - ret, |
| 797 | "\n%33s", " "); |
Peter Senna Tschudin | adccff3 | 2012-09-18 07:10:45 +0000 | [diff] [blame] | 798 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 799 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 800 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 801 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 802 | } |
| 803 | |
| 804 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 805 | * nameseq_list - print specified name sequence contents into the given buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 806 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 807 | 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] | 808 | u32 type, u32 lowbound, u32 upbound, u32 index) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 809 | { |
| 810 | struct sub_seq *sseq; |
| 811 | char typearea[11]; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 812 | int ret = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 813 | |
Allan Stephens | 0f15d36 | 2008-06-04 17:37:59 -0700 | [diff] [blame] | 814 | if (seq->first_free == 0) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 815 | return 0; |
Allan Stephens | 0f15d36 | 2008-06-04 17:37:59 -0700 | [diff] [blame] | 816 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 817 | sprintf(typearea, "%-10u", seq->type); |
| 818 | |
| 819 | if (depth == 1) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 820 | ret += tipc_snprintf(buf, len, "%s\n", typearea); |
| 821 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) { |
| 825 | if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 826 | ret += tipc_snprintf(buf + ret, len - ret, "%s ", |
| 827 | typearea); |
Allan Stephens | 307fdf5 | 2008-06-04 17:38:22 -0700 | [diff] [blame] | 828 | spin_lock_bh(&seq->lock); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 829 | ret += subseq_list(sseq, buf + ret, len - ret, |
| 830 | depth, index); |
Allan Stephens | 307fdf5 | 2008-06-04 17:38:22 -0700 | [diff] [blame] | 831 | spin_unlock_bh(&seq->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 832 | sprintf(typearea, "%10s", " "); |
| 833 | } |
| 834 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 835 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | /** |
| 839 | * nametbl_header - print name table header into the given buffer |
| 840 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 841 | static int nametbl_header(char *buf, int len, u32 depth) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 842 | { |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 843 | const char *header[] = { |
| 844 | "Type ", |
| 845 | "Lower Upper ", |
| 846 | "Port Identity ", |
| 847 | "Publication Scope" |
| 848 | }; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 849 | |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 850 | int i; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 851 | int ret = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 852 | |
Allan Stephens | c2de581 | 2010-08-17 11:00:14 +0000 | [diff] [blame] | 853 | if (depth > 4) |
| 854 | depth = 4; |
| 855 | for (i = 0; i < depth; i++) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 856 | ret += tipc_snprintf(buf + ret, len - ret, header[i]); |
| 857 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 858 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | /** |
| 862 | * nametbl_list - print specified name table contents into the given buffer |
| 863 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 864 | static int nametbl_list(char *buf, int len, u32 depth_info, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 865 | u32 type, u32 lowbound, u32 upbound) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 866 | { |
| 867 | struct hlist_head *seq_head; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 868 | struct name_seq *seq; |
| 869 | int all_types; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 870 | int ret = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 871 | u32 depth; |
| 872 | u32 i; |
| 873 | |
| 874 | all_types = (depth_info & TIPC_NTQ_ALLTYPES); |
| 875 | depth = (depth_info & ~TIPC_NTQ_ALLTYPES); |
| 876 | |
| 877 | if (depth == 0) |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 878 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 879 | |
| 880 | if (all_types) { |
| 881 | /* display all entries in name table to specified depth */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 882 | ret += nametbl_header(buf, len, depth); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 883 | lowbound = 0; |
| 884 | upbound = ~0; |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 885 | for (i = 0; i < TIPC_NAMETBL_SIZE; i++) { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 886 | seq_head = &tipc_nametbl->seq_hlist[i]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 887 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 888 | ret += nameseq_list(seq, buf + ret, len - ret, |
| 889 | depth, seq->type, |
| 890 | lowbound, upbound, i); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 891 | } |
| 892 | } |
| 893 | } else { |
| 894 | /* display only the sequence that matches the specified type */ |
| 895 | if (upbound < lowbound) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 896 | ret += tipc_snprintf(buf + ret, len - ret, |
| 897 | "invalid name sequence specified\n"); |
| 898 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 899 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 900 | ret += nametbl_header(buf + ret, len - ret, depth); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 901 | i = hash(type); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 902 | seq_head = &tipc_nametbl->seq_hlist[i]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 903 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 904 | if (seq->type == type) { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 905 | ret += nameseq_list(seq, buf + ret, len - ret, |
| 906 | depth, type, |
| 907 | lowbound, upbound, i); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 908 | break; |
| 909 | } |
| 910 | } |
| 911 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 912 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 913 | } |
| 914 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 915 | struct sk_buff *tipc_nametbl_get(const void *req_tlv_area, int req_tlv_space) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 916 | { |
| 917 | struct sk_buff *buf; |
| 918 | struct tipc_name_table_query *argv; |
| 919 | struct tlv_desc *rep_tlv; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 920 | char *pb; |
| 921 | int pb_len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 922 | int str_len; |
| 923 | |
| 924 | 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] | 925 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 926 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 927 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 928 | if (!buf) |
| 929 | return NULL; |
| 930 | |
| 931 | rep_tlv = (struct tlv_desc *)buf->data; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 932 | pb = TLV_DATA(rep_tlv); |
| 933 | pb_len = ULTRA_STRING_MAX_LEN; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 934 | argv = (struct tipc_name_table_query *)TLV_DATA(req_tlv_area); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 935 | rcu_read_lock(); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 936 | str_len = nametbl_list(pb, pb_len, ntohl(argv->depth), |
| 937 | ntohl(argv->type), |
| 938 | ntohl(argv->lowbound), ntohl(argv->upbound)); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 939 | rcu_read_unlock(); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 940 | str_len += 1; /* for "\0" */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 941 | skb_put(buf, TLV_SPACE(str_len)); |
| 942 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); |
| 943 | |
| 944 | return buf; |
| 945 | } |
| 946 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 947 | int tipc_nametbl_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 948 | { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 949 | int i; |
| 950 | |
| 951 | tipc_nametbl = kzalloc(sizeof(*tipc_nametbl), GFP_ATOMIC); |
| 952 | if (!tipc_nametbl) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 953 | return -ENOMEM; |
| 954 | |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 955 | for (i = 0; i < TIPC_NAMETBL_SIZE; i++) |
| 956 | INIT_HLIST_HEAD(&tipc_nametbl->seq_hlist[i]); |
| 957 | |
| 958 | INIT_LIST_HEAD(&tipc_nametbl->publ_list[TIPC_ZONE_SCOPE]); |
| 959 | INIT_LIST_HEAD(&tipc_nametbl->publ_list[TIPC_CLUSTER_SCOPE]); |
| 960 | INIT_LIST_HEAD(&tipc_nametbl->publ_list[TIPC_NODE_SCOPE]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 961 | return 0; |
| 962 | } |
| 963 | |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 964 | /** |
| 965 | * tipc_purge_publications - remove all publications for a given type |
| 966 | * |
| 967 | * tipc_nametbl_lock must be held when calling this function |
| 968 | */ |
| 969 | static void tipc_purge_publications(struct name_seq *seq) |
| 970 | { |
| 971 | struct publication *publ, *safe; |
| 972 | struct sub_seq *sseq; |
| 973 | struct name_info *info; |
| 974 | |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 975 | spin_lock_bh(&seq->lock); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 976 | sseq = seq->sseqs; |
| 977 | info = sseq->info; |
| 978 | list_for_each_entry_safe(publ, safe, &info->zone_list, zone_list) { |
| 979 | tipc_nametbl_remove_publ(publ->type, publ->lower, publ->node, |
| 980 | publ->ref, publ->key); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 981 | kfree_rcu(publ, rcu); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 982 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 983 | hlist_del_init_rcu(&seq->ns_list); |
| 984 | kfree(seq->sseqs); |
Ying Xue | 023160b | 2014-12-09 15:17:56 +0800 | [diff] [blame] | 985 | spin_unlock_bh(&seq->lock); |
Ying Xue | fb9962f | 2014-12-02 15:00:26 +0800 | [diff] [blame] | 986 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 987 | kfree_rcu(seq, rcu); |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 988 | } |
| 989 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 990 | void tipc_nametbl_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 991 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 992 | u32 i; |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 993 | struct name_seq *seq; |
| 994 | struct hlist_head *seq_head; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 995 | |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 996 | /* Verify name table is empty and purge any lingering |
| 997 | * publications, then release the name table |
| 998 | */ |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 999 | spin_lock_bh(&tipc_nametbl_lock); |
Ying Xue | f046e7d | 2012-08-16 12:09:11 +0000 | [diff] [blame] | 1000 | for (i = 0; i < TIPC_NAMETBL_SIZE; i++) { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1001 | if (hlist_empty(&tipc_nametbl->seq_hlist[i])) |
Paul Gortmaker | f705ab9 | 2012-07-11 17:35:01 -0400 | [diff] [blame] | 1002 | continue; |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1003 | seq_head = &tipc_nametbl->seq_hlist[i]; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1004 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) { |
Erik Hugne | 1bb8dce | 2014-03-06 14:40:20 +0100 | [diff] [blame] | 1005 | tipc_purge_publications(seq); |
| 1006 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1007 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1008 | spin_unlock_bh(&tipc_nametbl_lock); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1009 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1010 | synchronize_net(); |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1011 | kfree(tipc_nametbl); |
| 1012 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1013 | } |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1014 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1015 | static int __tipc_nl_add_nametable_publ(struct tipc_nl_msg *msg, |
| 1016 | struct name_seq *seq, |
| 1017 | struct sub_seq *sseq, u32 *last_publ) |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1018 | { |
| 1019 | void *hdr; |
| 1020 | struct nlattr *attrs; |
| 1021 | struct nlattr *publ; |
| 1022 | struct publication *p; |
| 1023 | |
| 1024 | if (*last_publ) { |
| 1025 | list_for_each_entry(p, &sseq->info->zone_list, zone_list) |
| 1026 | if (p->key == *last_publ) |
| 1027 | break; |
| 1028 | if (p->key != *last_publ) |
| 1029 | return -EPIPE; |
| 1030 | } else { |
| 1031 | p = list_first_entry(&sseq->info->zone_list, struct publication, |
| 1032 | zone_list); |
| 1033 | } |
| 1034 | |
| 1035 | list_for_each_entry_from(p, &sseq->info->zone_list, zone_list) { |
| 1036 | *last_publ = p->key; |
| 1037 | |
| 1038 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, |
| 1039 | &tipc_genl_v2_family, NLM_F_MULTI, |
| 1040 | TIPC_NL_NAME_TABLE_GET); |
| 1041 | if (!hdr) |
| 1042 | return -EMSGSIZE; |
| 1043 | |
| 1044 | attrs = nla_nest_start(msg->skb, TIPC_NLA_NAME_TABLE); |
| 1045 | if (!attrs) |
| 1046 | goto msg_full; |
| 1047 | |
| 1048 | publ = nla_nest_start(msg->skb, TIPC_NLA_NAME_TABLE_PUBL); |
| 1049 | if (!publ) |
| 1050 | goto attr_msg_full; |
| 1051 | |
| 1052 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_TYPE, seq->type)) |
| 1053 | goto publ_msg_full; |
| 1054 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_LOWER, sseq->lower)) |
| 1055 | goto publ_msg_full; |
| 1056 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_UPPER, sseq->upper)) |
| 1057 | goto publ_msg_full; |
| 1058 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_SCOPE, p->scope)) |
| 1059 | goto publ_msg_full; |
| 1060 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_NODE, p->node)) |
| 1061 | goto publ_msg_full; |
| 1062 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_REF, p->ref)) |
| 1063 | goto publ_msg_full; |
| 1064 | if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_KEY, p->key)) |
| 1065 | goto publ_msg_full; |
| 1066 | |
| 1067 | nla_nest_end(msg->skb, publ); |
| 1068 | nla_nest_end(msg->skb, attrs); |
| 1069 | genlmsg_end(msg->skb, hdr); |
| 1070 | } |
| 1071 | *last_publ = 0; |
| 1072 | |
| 1073 | return 0; |
| 1074 | |
| 1075 | publ_msg_full: |
| 1076 | nla_nest_cancel(msg->skb, publ); |
| 1077 | attr_msg_full: |
| 1078 | nla_nest_cancel(msg->skb, attrs); |
| 1079 | msg_full: |
| 1080 | genlmsg_cancel(msg->skb, hdr); |
| 1081 | |
| 1082 | return -EMSGSIZE; |
| 1083 | } |
| 1084 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1085 | static int __tipc_nl_subseq_list(struct tipc_nl_msg *msg, struct name_seq *seq, |
| 1086 | u32 *last_lower, u32 *last_publ) |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1087 | { |
| 1088 | struct sub_seq *sseq; |
| 1089 | struct sub_seq *sseq_start; |
| 1090 | int err; |
| 1091 | |
| 1092 | if (*last_lower) { |
| 1093 | sseq_start = nameseq_find_subseq(seq, *last_lower); |
| 1094 | if (!sseq_start) |
| 1095 | return -EPIPE; |
| 1096 | } else { |
| 1097 | sseq_start = seq->sseqs; |
| 1098 | } |
| 1099 | |
| 1100 | for (sseq = sseq_start; sseq != &seq->sseqs[seq->first_free]; sseq++) { |
| 1101 | err = __tipc_nl_add_nametable_publ(msg, seq, sseq, last_publ); |
| 1102 | if (err) { |
| 1103 | *last_lower = sseq->lower; |
| 1104 | return err; |
| 1105 | } |
| 1106 | } |
| 1107 | *last_lower = 0; |
| 1108 | |
| 1109 | return 0; |
| 1110 | } |
| 1111 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1112 | static int __tipc_nl_seq_list(struct tipc_nl_msg *msg, u32 *last_type, |
| 1113 | u32 *last_lower, u32 *last_publ) |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1114 | { |
| 1115 | struct hlist_head *seq_head; |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1116 | struct name_seq *seq = NULL; |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1117 | int err; |
| 1118 | int i; |
| 1119 | |
| 1120 | if (*last_type) |
| 1121 | i = hash(*last_type); |
| 1122 | else |
| 1123 | i = 0; |
| 1124 | |
| 1125 | for (; i < TIPC_NAMETBL_SIZE; i++) { |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 1126 | seq_head = &tipc_nametbl->seq_hlist[i]; |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1127 | |
| 1128 | if (*last_type) { |
| 1129 | seq = nametbl_find_seq(*last_type); |
| 1130 | if (!seq) |
| 1131 | return -EPIPE; |
| 1132 | } else { |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1133 | hlist_for_each_entry_rcu(seq, seq_head, ns_list) |
| 1134 | break; |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1135 | if (!seq) |
| 1136 | continue; |
| 1137 | } |
| 1138 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1139 | hlist_for_each_entry_from_rcu(seq, ns_list) { |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1140 | spin_lock_bh(&seq->lock); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1141 | err = __tipc_nl_subseq_list(msg, seq, last_lower, |
| 1142 | last_publ); |
| 1143 | |
| 1144 | if (err) { |
| 1145 | *last_type = seq->type; |
| 1146 | spin_unlock_bh(&seq->lock); |
| 1147 | return err; |
| 1148 | } |
| 1149 | spin_unlock_bh(&seq->lock); |
| 1150 | } |
| 1151 | *last_type = 0; |
| 1152 | } |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 1157 | { |
| 1158 | int err; |
| 1159 | int done = cb->args[3]; |
| 1160 | u32 last_type = cb->args[0]; |
| 1161 | u32 last_lower = cb->args[1]; |
| 1162 | u32 last_publ = cb->args[2]; |
| 1163 | struct tipc_nl_msg msg; |
| 1164 | |
| 1165 | if (done) |
| 1166 | return 0; |
| 1167 | |
| 1168 | msg.skb = skb; |
| 1169 | msg.portid = NETLINK_CB(cb->skb).portid; |
| 1170 | msg.seq = cb->nlh->nlmsg_seq; |
| 1171 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1172 | rcu_read_lock(); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1173 | err = __tipc_nl_seq_list(&msg, &last_type, &last_lower, &last_publ); |
| 1174 | if (!err) { |
| 1175 | done = 1; |
| 1176 | } else if (err != -EMSGSIZE) { |
| 1177 | /* We never set seq or call nl_dump_check_consistent() this |
| 1178 | * means that setting prev_seq here will cause the consistence |
| 1179 | * check to fail in the netlink callback handler. Resulting in |
| 1180 | * the NLMSG_DONE message having the NLM_F_DUMP_INTR flag set if |
| 1181 | * we got an error. |
| 1182 | */ |
| 1183 | cb->prev_seq = 1; |
| 1184 | } |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 1185 | rcu_read_unlock(); |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 1186 | |
| 1187 | cb->args[0] = last_type; |
| 1188 | cb->args[1] = last_lower; |
| 1189 | cb->args[2] = last_publ; |
| 1190 | cb->args[3] = done; |
| 1191 | |
| 1192 | return skb->len; |
| 1193 | } |