2 * net/tipc/name_table.c: TIPC name table code
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2004-2005, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
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
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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
34 * POSSIBILITY OF SUCH DAMAGE.
40 #include "name_table.h"
41 #include "name_distr.h"
43 #include "node_subscr.h"
49 int tipc_nametbl_size = 1024; /* must be a power of 2 */
52 * struct sub_seq - container for all published instances of a name sequence
53 * @lower: name sequence lower bound
54 * @upper: name sequence upper bound
55 * @node_list: circular list of matching publications with >= node scope
56 * @cluster_list: circular list of matching publications with >= cluster scope
57 * @zone_list: circular list of matching publications with >= zone scope
63 struct publication *node_list;
64 struct publication *cluster_list;
65 struct publication *zone_list;
69 * struct name_seq - container for all published instances of a name type
70 * @type: 32 bit 'type' value for name sequence
71 * @sseq: pointer to dynamically-sized array of sub-sequences of this 'type';
72 * sub-sequences are sorted in ascending order
73 * @alloc: number of sub-sequences currently in array
74 * @first_free: upper bound of highest sub-sequence + 1
75 * @ns_list: links to adjacent name sequences in hash chain
76 * @subscriptions: list of subscriptions for this 'type'
77 * @lock: spinlock controlling access to name sequence structure
82 struct sub_seq *sseqs;
85 struct hlist_node ns_list;
86 struct list_head subscriptions;
91 * struct name_table - table containing all existing port name publications
92 * @types: pointer to fixed-sized array of name sequence lists,
93 * accessed via hashing on 'type'; name sequence lists are *not* sorted
94 * @local_publ_count: number of publications issued by this node
98 struct hlist_head *types;
102 static struct name_table table = { NULL } ;
103 static atomic_t rsv_publ_ok = ATOMIC_INIT(0);
104 rwlock_t tipc_nametbl_lock = RW_LOCK_UNLOCKED;
107 static inline int hash(int x)
109 return(x & (tipc_nametbl_size - 1));
113 * publ_create - create a publication structure
116 static struct publication *publ_create(u32 type, u32 lower, u32 upper,
117 u32 scope, u32 node, u32 port_ref,
120 struct publication *publ =
121 (struct publication *)kmalloc(sizeof(*publ), GFP_ATOMIC);
123 warn("Memory squeeze; failed to create publication\n");
127 memset(publ, 0, sizeof(*publ));
133 publ->ref = port_ref;
135 INIT_LIST_HEAD(&publ->local_list);
136 INIT_LIST_HEAD(&publ->pport_list);
137 INIT_LIST_HEAD(&publ->subscr.nodesub_list);
142 * tipc_subseq_alloc - allocate a specified number of sub-sequence structures
145 struct sub_seq *tipc_subseq_alloc(u32 cnt)
147 u32 sz = cnt * sizeof(struct sub_seq);
148 struct sub_seq *sseq = (struct sub_seq *)kmalloc(sz, GFP_ATOMIC);
156 * tipc_nameseq_create - create a name sequence structure for the specified 'type'
158 * Allocates a single sub-sequence structure and sets it to all 0's.
161 struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head)
163 struct name_seq *nseq =
164 (struct name_seq *)kmalloc(sizeof(*nseq), GFP_ATOMIC);
165 struct sub_seq *sseq = tipc_subseq_alloc(1);
167 if (!nseq || !sseq) {
168 warn("Memory squeeze; failed to create name sequence\n");
174 memset(nseq, 0, sizeof(*nseq));
175 nseq->lock = SPIN_LOCK_UNLOCKED;
178 dbg("tipc_nameseq_create() nseq = %x type %u, ssseqs %x, ff: %u\n",
179 nseq, type, nseq->sseqs, nseq->first_free);
181 INIT_HLIST_NODE(&nseq->ns_list);
182 INIT_LIST_HEAD(&nseq->subscriptions);
183 hlist_add_head(&nseq->ns_list, seq_head);
188 * nameseq_find_subseq - find sub-sequence (if any) matching a name instance
190 * Very time-critical, so binary searches through sub-sequence array.
193 static inline struct sub_seq *nameseq_find_subseq(struct name_seq *nseq,
196 struct sub_seq *sseqs = nseq->sseqs;
198 int high = nseq->first_free - 1;
201 while (low <= high) {
202 mid = (low + high) / 2;
203 if (instance < sseqs[mid].lower)
205 else if (instance > sseqs[mid].upper)
214 * nameseq_locate_subseq - determine position of name instance in sub-sequence
216 * Returns index in sub-sequence array of the entry that contains the specified
217 * instance value; if no entry contains that value, returns the position
218 * where a new entry for it would be inserted in the array.
220 * Note: Similar to binary search code for locating a sub-sequence.
223 static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance)
225 struct sub_seq *sseqs = nseq->sseqs;
227 int high = nseq->first_free - 1;
230 while (low <= high) {
231 mid = (low + high) / 2;
232 if (instance < sseqs[mid].lower)
234 else if (instance > sseqs[mid].upper)
243 * tipc_nameseq_insert_publ -
246 struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
247 u32 type, u32 lower, u32 upper,
248 u32 scope, u32 node, u32 port, u32 key)
250 struct subscription *s;
251 struct subscription *st;
252 struct publication *publ;
253 struct sub_seq *sseq;
254 int created_subseq = 0;
256 assert(nseq->first_free <= nseq->alloc);
257 sseq = nameseq_find_subseq(nseq, lower);
258 dbg("nameseq_ins: for seq %x,<%u,%u>, found sseq %x\n",
259 nseq, type, lower, sseq);
262 /* Lower end overlaps existing entry => need an exact match */
264 if ((sseq->lower != lower) || (sseq->upper != upper)) {
265 warn("Overlapping publ <%u,%u,%u>\n", type, lower, upper);
270 struct sub_seq *freesseq;
272 /* Find where lower end should be inserted */
274 inspos = nameseq_locate_subseq(nseq, lower);
276 /* Fail if upper end overlaps into an existing entry */
278 if ((inspos < nseq->first_free) &&
279 (upper >= nseq->sseqs[inspos].lower)) {
280 warn("Overlapping publ <%u,%u,%u>\n", type, lower, upper);
284 /* Ensure there is space for new sub-sequence */
286 if (nseq->first_free == nseq->alloc) {
287 struct sub_seq *sseqs = nseq->sseqs;
288 nseq->sseqs = tipc_subseq_alloc(nseq->alloc * 2);
289 if (nseq->sseqs != NULL) {
290 memcpy(nseq->sseqs, sseqs,
291 nseq->alloc * sizeof (struct sub_seq));
293 dbg("Allocated %u sseqs\n", nseq->alloc);
296 warn("Memory squeeze; failed to create sub-sequence\n");
300 dbg("Have %u sseqs for type %u\n", nseq->alloc, type);
302 /* Insert new sub-sequence */
304 dbg("ins in pos %u, ff = %u\n", inspos, nseq->first_free);
305 sseq = &nseq->sseqs[inspos];
306 freesseq = &nseq->sseqs[nseq->first_free];
307 memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof (*sseq));
308 memset(sseq, 0, sizeof (*sseq));
314 dbg("inserting (%u %u %u) from %x:%u into sseq %x(%u,%u) of seq %x\n",
315 type, lower, upper, node, port, sseq,
316 sseq->lower, sseq->upper, nseq);
318 /* Insert a publication: */
320 publ = publ_create(type, lower, upper, scope, node, port, key);
323 dbg("inserting publ %x, node=%x publ->node=%x, subscr->node=%x\n",
324 publ, node, publ->node, publ->subscr.node);
326 if (!sseq->zone_list)
327 sseq->zone_list = publ->zone_list_next = publ;
329 publ->zone_list_next = sseq->zone_list->zone_list_next;
330 sseq->zone_list->zone_list_next = publ;
333 if (in_own_cluster(node)) {
334 if (!sseq->cluster_list)
335 sseq->cluster_list = publ->cluster_list_next = publ;
337 publ->cluster_list_next =
338 sseq->cluster_list->cluster_list_next;
339 sseq->cluster_list->cluster_list_next = publ;
343 if (node == tipc_own_addr) {
344 if (!sseq->node_list)
345 sseq->node_list = publ->node_list_next = publ;
347 publ->node_list_next = sseq->node_list->node_list_next;
348 sseq->node_list->node_list_next = publ;
353 * Any subscriptions waiting for notification?
355 list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
356 dbg("calling report_overlap()\n");
357 tipc_subscr_report_overlap(s,
369 * tipc_nameseq_remove_publ -
372 struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
373 u32 node, u32 ref, u32 key)
375 struct publication *publ;
376 struct publication *prev;
377 struct sub_seq *sseq = nameseq_find_subseq(nseq, inst);
378 struct sub_seq *free;
379 struct subscription *s, *st;
380 int removed_subseq = 0;
387 warn("Withdraw unknown <%u,%u>?\n", nseq->type, inst);
389 dbg("Dumping subseqs %x for %x, alloc = %u,ff=%u\n",
390 nseq->sseqs, nseq, nseq->alloc,
392 for (i = 0; i < nseq->first_free; i++) {
393 dbg("Subseq %u(%x): lower = %u,upper = %u\n",
394 i, &nseq->sseqs[i], nseq->sseqs[i].lower,
395 nseq->sseqs[i].upper);
399 dbg("nameseq_remove: seq: %x, sseq %x, <%u,%u> key %u\n",
400 nseq, sseq, nseq->type, inst, key);
402 prev = sseq->zone_list;
403 publ = sseq->zone_list->zone_list_next;
404 while ((publ->key != key) || (publ->ref != ref) ||
405 (publ->node && (publ->node != node))) {
407 publ = publ->zone_list_next;
408 assert(prev != sseq->zone_list);
410 if (publ != sseq->zone_list)
411 prev->zone_list_next = publ->zone_list_next;
412 else if (publ->zone_list_next != publ) {
413 prev->zone_list_next = publ->zone_list_next;
414 sseq->zone_list = publ->zone_list_next;
419 if (in_own_cluster(node)) {
420 prev = sseq->cluster_list;
421 publ = sseq->cluster_list->cluster_list_next;
422 while ((publ->key != key) || (publ->ref != ref) ||
423 (publ->node && (publ->node != node))) {
425 publ = publ->cluster_list_next;
426 assert(prev != sseq->cluster_list);
428 if (publ != sseq->cluster_list)
429 prev->cluster_list_next = publ->cluster_list_next;
430 else if (publ->cluster_list_next != publ) {
431 prev->cluster_list_next = publ->cluster_list_next;
432 sseq->cluster_list = publ->cluster_list_next;
434 sseq->cluster_list = 0;
438 if (node == tipc_own_addr) {
439 prev = sseq->node_list;
440 publ = sseq->node_list->node_list_next;
441 while ((publ->key != key) || (publ->ref != ref) ||
442 (publ->node && (publ->node != node))) {
444 publ = publ->node_list_next;
445 assert(prev != sseq->node_list);
447 if (publ != sseq->node_list)
448 prev->node_list_next = publ->node_list_next;
449 else if (publ->node_list_next != publ) {
450 prev->node_list_next = publ->node_list_next;
451 sseq->node_list = publ->node_list_next;
456 assert(!publ->node || (publ->node == node));
457 assert(publ->ref == ref);
458 assert(publ->key == key);
461 * Contract subseq list if no more publications:
463 if (!sseq->node_list && !sseq->cluster_list && !sseq->zone_list) {
464 free = &nseq->sseqs[nseq->first_free--];
465 memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof (*sseq));
470 * Any subscriptions waiting ?
472 list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
473 tipc_subscr_report_overlap(s,
485 * tipc_nameseq_subscribe: attach a subscription, and issue
486 * the prescribed number of events if there is any sub-
487 * sequence overlapping with the requested sequence
490 void tipc_nameseq_subscribe(struct name_seq *nseq, struct subscription *s)
492 struct sub_seq *sseq = nseq->sseqs;
494 list_add(&s->nameseq_list, &nseq->subscriptions);
499 while (sseq != &nseq->sseqs[nseq->first_free]) {
500 struct publication *zl = sseq->zone_list;
501 if (zl && tipc_subscr_overlap(s,sseq->lower,sseq->upper)) {
502 struct publication *crs = zl;
506 tipc_subscr_report_overlap(s,
514 crs = crs->zone_list_next;
521 static struct name_seq *nametbl_find_seq(u32 type)
523 struct hlist_head *seq_head;
524 struct hlist_node *seq_node;
527 dbg("find_seq %u,(%u,0x%x) table = %p, hash[type] = %u\n",
528 type, ntohl(type), type, table.types, hash(type));
530 seq_head = &table.types[hash(type)];
531 hlist_for_each_entry(ns, seq_node, seq_head, ns_list) {
532 if (ns->type == type) {
533 dbg("found %x\n", ns);
541 struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
542 u32 scope, u32 node, u32 port, u32 key)
544 struct name_seq *seq = nametbl_find_seq(type);
546 dbg("ins_publ: <%u,%x,%x> found %x\n", type, lower, upper, seq);
548 warn("Failed to publish illegal <%u,%u,%u>\n",
553 dbg("Publishing <%u,%u,%u> from %x\n", type, lower, upper, node);
555 seq = tipc_nameseq_create(type, &table.types[hash(type)]);
556 dbg("tipc_nametbl_insert_publ: created %x\n", seq);
561 assert(seq->type == type);
562 return tipc_nameseq_insert_publ(seq, type, lower, upper,
563 scope, node, port, key);
566 struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
567 u32 node, u32 ref, u32 key)
569 struct publication *publ;
570 struct name_seq *seq = nametbl_find_seq(type);
575 dbg("Withdrawing <%u,%u> from %x\n", type, lower, node);
576 publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
578 if (!seq->first_free && list_empty(&seq->subscriptions)) {
579 hlist_del_init(&seq->ns_list);
587 * tipc_nametbl_translate(): Translate tipc_name -> tipc_portid.
588 * Very time-critical.
590 * Note: on entry 'destnode' is the search domain used during translation;
591 * on exit it passes back the node address of the matching port (if any)
594 u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
596 struct sub_seq *sseq;
597 struct publication *publ = 0;
598 struct name_seq *seq;
601 if (!in_scope(*destnode, tipc_own_addr))
604 read_lock_bh(&tipc_nametbl_lock);
605 seq = nametbl_find_seq(type);
608 sseq = nameseq_find_subseq(seq, instance);
611 spin_lock_bh(&seq->lock);
613 /* Closest-First Algorithm: */
614 if (likely(!*destnode)) {
615 publ = sseq->node_list;
617 sseq->node_list = publ->node_list_next;
620 *destnode = publ->node;
621 spin_unlock_bh(&seq->lock);
622 read_unlock_bh(&tipc_nametbl_lock);
625 publ = sseq->cluster_list;
627 sseq->cluster_list = publ->cluster_list_next;
630 publ = sseq->zone_list;
632 sseq->zone_list = publ->zone_list_next;
637 /* Round-Robin Algorithm: */
638 else if (*destnode == tipc_own_addr) {
639 publ = sseq->node_list;
641 sseq->node_list = publ->node_list_next;
644 } else if (in_own_cluster(*destnode)) {
645 publ = sseq->cluster_list;
647 sseq->cluster_list = publ->cluster_list_next;
651 publ = sseq->zone_list;
653 sseq->zone_list = publ->zone_list_next;
657 spin_unlock_bh(&seq->lock);
660 read_unlock_bh(&tipc_nametbl_lock);
665 * tipc_nametbl_mc_translate - find multicast destinations
667 * Creates list of all local ports that overlap the given multicast address;
668 * also determines if any off-node ports overlap.
670 * Note: Publications with a scope narrower than 'limit' are ignored.
671 * (i.e. local node-scope publications mustn't receive messages arriving
672 * from another node, even if the multcast link brought it here)
674 * Returns non-zero if any off-node ports overlap
677 int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,
678 struct port_list *dports)
680 struct name_seq *seq;
681 struct sub_seq *sseq;
682 struct sub_seq *sseq_stop;
685 read_lock_bh(&tipc_nametbl_lock);
686 seq = nametbl_find_seq(type);
690 spin_lock_bh(&seq->lock);
692 sseq = seq->sseqs + nameseq_locate_subseq(seq, lower);
693 sseq_stop = seq->sseqs + seq->first_free;
694 for (; sseq != sseq_stop; sseq++) {
695 struct publication *publ;
697 if (sseq->lower > upper)
699 publ = sseq->cluster_list;
700 if (publ && (publ->scope <= limit))
702 if (publ->node == tipc_own_addr)
703 tipc_port_list_add(dports, publ->ref);
706 publ = publ->cluster_list_next;
707 } while (publ != sseq->cluster_list);
710 spin_unlock_bh(&seq->lock);
712 read_unlock_bh(&tipc_nametbl_lock);
717 * tipc_nametbl_publish_rsv - publish port name using a reserved name type
720 int tipc_nametbl_publish_rsv(u32 ref, unsigned int scope,
721 struct tipc_name_seq const *seq)
725 atomic_inc(&rsv_publ_ok);
726 res = tipc_publish(ref, scope, seq);
727 atomic_dec(&rsv_publ_ok);
732 * tipc_nametbl_publish - add name publication to network name tables
735 struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
736 u32 scope, u32 port_ref, u32 key)
738 struct publication *publ;
740 if (table.local_publ_count >= tipc_max_publications) {
741 warn("Failed publish: max %u local publication\n",
742 tipc_max_publications);
745 if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {
746 warn("Failed to publish reserved name <%u,%u,%u>\n",
751 write_lock_bh(&tipc_nametbl_lock);
752 table.local_publ_count++;
753 publ = tipc_nametbl_insert_publ(type, lower, upper, scope,
754 tipc_own_addr, port_ref, key);
755 if (publ && (scope != TIPC_NODE_SCOPE)) {
756 tipc_named_publish(publ);
758 write_unlock_bh(&tipc_nametbl_lock);
763 * tipc_nametbl_withdraw - withdraw name publication from network name tables
766 int tipc_nametbl_withdraw(u32 type, u32 lower, u32 ref, u32 key)
768 struct publication *publ;
770 dbg("tipc_nametbl_withdraw:<%d,%d,%d>\n", type, lower, key);
771 write_lock_bh(&tipc_nametbl_lock);
772 publ = tipc_nametbl_remove_publ(type, lower, tipc_own_addr, ref, key);
774 table.local_publ_count--;
775 if (publ->scope != TIPC_NODE_SCOPE)
776 tipc_named_withdraw(publ);
777 write_unlock_bh(&tipc_nametbl_lock);
778 list_del_init(&publ->pport_list);
782 write_unlock_bh(&tipc_nametbl_lock);
787 * tipc_nametbl_subscribe - add a subscription object to the name table
791 tipc_nametbl_subscribe(struct subscription *s)
793 u32 type = s->seq.type;
794 struct name_seq *seq;
796 write_lock_bh(&tipc_nametbl_lock);
797 seq = nametbl_find_seq(type);
799 seq = tipc_nameseq_create(type, &table.types[hash(type)]);
802 spin_lock_bh(&seq->lock);
803 dbg("tipc_nametbl_subscribe:found %x for <%u,%u,%u>\n",
804 seq, type, s->seq.lower, s->seq.upper);
805 assert(seq->type == type);
806 tipc_nameseq_subscribe(seq, s);
807 spin_unlock_bh(&seq->lock);
809 write_unlock_bh(&tipc_nametbl_lock);
813 * tipc_nametbl_unsubscribe - remove a subscription object from name table
817 tipc_nametbl_unsubscribe(struct subscription *s)
819 struct name_seq *seq;
821 write_lock_bh(&tipc_nametbl_lock);
822 seq = nametbl_find_seq(s->seq.type);
824 spin_lock_bh(&seq->lock);
825 list_del_init(&s->nameseq_list);
826 spin_unlock_bh(&seq->lock);
827 if ((seq->first_free == 0) && list_empty(&seq->subscriptions)) {
828 hlist_del_init(&seq->ns_list);
833 write_unlock_bh(&tipc_nametbl_lock);
838 * subseq_list: print specified sub-sequence contents into the given buffer
841 static void subseq_list(struct sub_seq *sseq, struct print_buf *buf, u32 depth,
846 struct publication *publ = sseq->zone_list;
848 tipc_printf(buf, "%-10u %-10u ", sseq->lower, sseq->upper);
850 if (depth == 2 || !publ) {
851 tipc_printf(buf, "\n");
856 sprintf (portIdStr, "<%u.%u.%u:%u>",
857 tipc_zone(publ->node), tipc_cluster(publ->node),
858 tipc_node(publ->node), publ->ref);
859 tipc_printf(buf, "%-26s ", portIdStr);
861 if (publ->node != tipc_own_addr)
863 else if (publ->scope == TIPC_NODE_SCOPE)
865 else if (publ->scope == TIPC_CLUSTER_SCOPE)
866 scopeStr = "cluster";
869 tipc_printf(buf, "%-10u %s", publ->key, scopeStr);
872 publ = publ->zone_list_next;
873 if (publ == sseq->zone_list)
876 tipc_printf(buf, "\n%33s", " ");
879 tipc_printf(buf, "\n");
883 * nameseq_list: print specified name sequence contents into the given buffer
886 static void nameseq_list(struct name_seq *seq, struct print_buf *buf, u32 depth,
887 u32 type, u32 lowbound, u32 upbound, u32 index)
889 struct sub_seq *sseq;
892 sprintf(typearea, "%-10u", seq->type);
895 tipc_printf(buf, "%s\n", typearea);
899 for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) {
900 if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) {
901 tipc_printf(buf, "%s ", typearea);
902 subseq_list(sseq, buf, depth, index);
903 sprintf(typearea, "%10s", " ");
909 * nametbl_header - print name table header into the given buffer
912 static void nametbl_header(struct print_buf *buf, u32 depth)
914 tipc_printf(buf, "Type ");
917 tipc_printf(buf, "Lower Upper ");
919 tipc_printf(buf, "Port Identity ");
921 tipc_printf(buf, "Publication");
923 tipc_printf(buf, "\n-----------");
926 tipc_printf(buf, "--------------------- ");
928 tipc_printf(buf, "-------------------------- ");
930 tipc_printf(buf, "------------------");
932 tipc_printf(buf, "\n");
936 * nametbl_list - print specified name table contents into the given buffer
939 static void nametbl_list(struct print_buf *buf, u32 depth_info,
940 u32 type, u32 lowbound, u32 upbound)
942 struct hlist_head *seq_head;
943 struct hlist_node *seq_node;
944 struct name_seq *seq;
949 all_types = (depth_info & TIPC_NTQ_ALLTYPES);
950 depth = (depth_info & ~TIPC_NTQ_ALLTYPES);
956 /* display all entries in name table to specified depth */
957 nametbl_header(buf, depth);
960 for (i = 0; i < tipc_nametbl_size; i++) {
961 seq_head = &table.types[i];
962 hlist_for_each_entry(seq, seq_node, seq_head, ns_list) {
963 nameseq_list(seq, buf, depth, seq->type,
964 lowbound, upbound, i);
968 /* display only the sequence that matches the specified type */
969 if (upbound < lowbound) {
970 tipc_printf(buf, "invalid name sequence specified\n");
973 nametbl_header(buf, depth);
975 seq_head = &table.types[i];
976 hlist_for_each_entry(seq, seq_node, seq_head, ns_list) {
977 if (seq->type == type) {
978 nameseq_list(seq, buf, depth, type,
979 lowbound, upbound, i);
986 void tipc_nametbl_print(struct print_buf *buf, const char *str)
988 tipc_printf(buf, str);
989 read_lock_bh(&tipc_nametbl_lock);
990 nametbl_list(buf, 0, 0, 0, 0);
991 read_unlock_bh(&tipc_nametbl_lock);
994 #define MAX_NAME_TBL_QUERY 32768
996 struct sk_buff *tipc_nametbl_get(const void *req_tlv_area, int req_tlv_space)
999 struct tipc_name_table_query *argv;
1000 struct tlv_desc *rep_tlv;
1004 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NAME_TBL_QUERY))
1005 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
1007 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_NAME_TBL_QUERY));
1011 rep_tlv = (struct tlv_desc *)buf->data;
1012 tipc_printbuf_init(&b, TLV_DATA(rep_tlv), MAX_NAME_TBL_QUERY);
1013 argv = (struct tipc_name_table_query *)TLV_DATA(req_tlv_area);
1014 read_lock_bh(&tipc_nametbl_lock);
1015 nametbl_list(&b, ntohl(argv->depth), ntohl(argv->type),
1016 ntohl(argv->lowbound), ntohl(argv->upbound));
1017 read_unlock_bh(&tipc_nametbl_lock);
1018 str_len = tipc_printbuf_validate(&b);
1020 skb_put(buf, TLV_SPACE(str_len));
1021 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
1026 void tipc_nametbl_dump(void)
1028 nametbl_list(TIPC_CONS, 0, 0, 0, 0);
1031 int tipc_nametbl_init(void)
1033 int array_size = sizeof(struct hlist_head) * tipc_nametbl_size;
1035 table.types = (struct hlist_head *)kmalloc(array_size, GFP_ATOMIC);
1039 write_lock_bh(&tipc_nametbl_lock);
1040 memset(table.types, 0, array_size);
1041 table.local_publ_count = 0;
1042 write_unlock_bh(&tipc_nametbl_lock);
1046 void tipc_nametbl_stop(void)
1048 struct hlist_head *seq_head;
1049 struct hlist_node *seq_node;
1050 struct hlist_node *tmp;
1051 struct name_seq *seq;
1057 write_lock_bh(&tipc_nametbl_lock);
1058 for (i = 0; i < tipc_nametbl_size; i++) {
1059 seq_head = &table.types[i];
1060 hlist_for_each_entry_safe(seq, seq_node, tmp, seq_head, ns_list) {
1061 struct sub_seq *sseq = seq->sseqs;
1063 for (; sseq != &seq->sseqs[seq->first_free]; sseq++) {
1064 struct publication *publ = sseq->zone_list;
1067 struct publication *next =
1068 publ->zone_list_next;
1072 while (publ != sseq->zone_list);
1078 write_unlock_bh(&tipc_nametbl_lock);