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
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
34 * POSSIBILITY OF SUCH DAMAGE.
40 #include "name_table.h"
41 #include "name_distr.h"
43 #include "node_subscr.h"
49 static 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: array index of first unused sub-sequence entry
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 DEFINE_RWLOCK(tipc_nametbl_lock);
107 static 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 = kzalloc(sizeof(*publ), GFP_ATOMIC);
122 warn("Publication creation failure, no memory\n");
131 publ->ref = port_ref;
133 INIT_LIST_HEAD(&publ->local_list);
134 INIT_LIST_HEAD(&publ->pport_list);
135 INIT_LIST_HEAD(&publ->subscr.nodesub_list);
140 * tipc_subseq_alloc - allocate a specified number of sub-sequence structures
143 static struct sub_seq *tipc_subseq_alloc(u32 cnt)
145 struct sub_seq *sseq = kcalloc(cnt, sizeof(struct sub_seq), GFP_ATOMIC);
150 * tipc_nameseq_create - create a name sequence structure for the specified 'type'
152 * Allocates a single sub-sequence structure and sets it to all 0's.
155 static struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head)
157 struct name_seq *nseq = kzalloc(sizeof(*nseq), GFP_ATOMIC);
158 struct sub_seq *sseq = tipc_subseq_alloc(1);
160 if (!nseq || !sseq) {
161 warn("Name sequence creation failed, no memory\n");
167 spin_lock_init(&nseq->lock);
170 dbg("tipc_nameseq_create(): nseq = %p, type %u, ssseqs %p, ff: %u\n",
171 nseq, type, nseq->sseqs, nseq->first_free);
173 INIT_HLIST_NODE(&nseq->ns_list);
174 INIT_LIST_HEAD(&nseq->subscriptions);
175 hlist_add_head(&nseq->ns_list, seq_head);
180 * nameseq_find_subseq - find sub-sequence (if any) matching a name instance
182 * Very time-critical, so binary searches through sub-sequence array.
185 static struct sub_seq *nameseq_find_subseq(struct name_seq *nseq,
188 struct sub_seq *sseqs = nseq->sseqs;
190 int high = nseq->first_free - 1;
193 while (low <= high) {
194 mid = (low + high) / 2;
195 if (instance < sseqs[mid].lower)
197 else if (instance > sseqs[mid].upper)
206 * nameseq_locate_subseq - determine position of name instance in sub-sequence
208 * Returns index in sub-sequence array of the entry that contains the specified
209 * instance value; if no entry contains that value, returns the position
210 * where a new entry for it would be inserted in the array.
212 * Note: Similar to binary search code for locating a sub-sequence.
215 static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance)
217 struct sub_seq *sseqs = nseq->sseqs;
219 int high = nseq->first_free - 1;
222 while (low <= high) {
223 mid = (low + high) / 2;
224 if (instance < sseqs[mid].lower)
226 else if (instance > sseqs[mid].upper)
235 * tipc_nameseq_insert_publ -
238 static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
239 u32 type, u32 lower, u32 upper,
240 u32 scope, u32 node, u32 port, u32 key)
242 struct subscription *s;
243 struct subscription *st;
244 struct publication *publ;
245 struct sub_seq *sseq;
246 int created_subseq = 0;
248 sseq = nameseq_find_subseq(nseq, lower);
249 dbg("nameseq_ins: for seq %p, {%u,%u}, found sseq %p\n",
250 nseq, type, lower, sseq);
253 /* Lower end overlaps existing entry => need an exact match */
255 if ((sseq->lower != lower) || (sseq->upper != upper)) {
256 warn("Cannot publish {%u,%u,%u}, overlap error\n",
262 struct sub_seq *freesseq;
264 /* Find where lower end should be inserted */
266 inspos = nameseq_locate_subseq(nseq, lower);
268 /* Fail if upper end overlaps into an existing entry */
270 if ((inspos < nseq->first_free) &&
271 (upper >= nseq->sseqs[inspos].lower)) {
272 warn("Cannot publish {%u,%u,%u}, overlap error\n",
277 /* Ensure there is space for new sub-sequence */
279 if (nseq->first_free == nseq->alloc) {
280 struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2);
283 warn("Cannot publish {%u,%u,%u}, no memory\n",
287 dbg("Allocated %u more sseqs\n", nseq->alloc);
288 memcpy(sseqs, nseq->sseqs,
289 nseq->alloc * sizeof(struct sub_seq));
294 dbg("Have %u sseqs for type %u\n", nseq->alloc, type);
296 /* Insert new sub-sequence */
298 dbg("ins in pos %u, ff = %u\n", inspos, nseq->first_free);
299 sseq = &nseq->sseqs[inspos];
300 freesseq = &nseq->sseqs[nseq->first_free];
301 memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof (*sseq));
302 memset(sseq, 0, sizeof (*sseq));
308 dbg("inserting {%u,%u,%u} from <0x%x:%u> into sseq %p(%u,%u) of seq %p\n",
309 type, lower, upper, node, port, sseq,
310 sseq->lower, sseq->upper, nseq);
312 /* Insert a publication: */
314 publ = publ_create(type, lower, upper, scope, node, port, key);
317 dbg("inserting publ %p, node=0x%x publ->node=0x%x, subscr->node=%p\n",
318 publ, node, publ->node, publ->subscr.node);
320 if (!sseq->zone_list)
321 sseq->zone_list = publ->zone_list_next = publ;
323 publ->zone_list_next = sseq->zone_list->zone_list_next;
324 sseq->zone_list->zone_list_next = publ;
327 if (in_own_cluster(node)) {
328 if (!sseq->cluster_list)
329 sseq->cluster_list = publ->cluster_list_next = publ;
331 publ->cluster_list_next =
332 sseq->cluster_list->cluster_list_next;
333 sseq->cluster_list->cluster_list_next = publ;
337 if (node == tipc_own_addr) {
338 if (!sseq->node_list)
339 sseq->node_list = publ->node_list_next = publ;
341 publ->node_list_next = sseq->node_list->node_list_next;
342 sseq->node_list->node_list_next = publ;
347 * Any subscriptions waiting for notification?
349 list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
350 dbg("calling report_overlap()\n");
351 tipc_subscr_report_overlap(s,
363 * tipc_nameseq_remove_publ -
365 * NOTE: There may be cases where TIPC is asked to remove a publication
366 * that is not in the name table. For example, if another node issues a
367 * publication for a name sequence that overlaps an existing name sequence
368 * the publication will not be recorded, which means the publication won't
369 * be found when the name sequence is later withdrawn by that node.
370 * A failed withdraw request simply returns a failure indication and lets the
371 * caller issue any error or warning messages associated with such a problem.
374 static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
375 u32 node, u32 ref, u32 key)
377 struct publication *publ;
378 struct publication *curr;
379 struct publication *prev;
380 struct sub_seq *sseq = nameseq_find_subseq(nseq, inst);
381 struct sub_seq *free;
382 struct subscription *s, *st;
383 int removed_subseq = 0;
388 dbg("tipc_nameseq_remove_publ: seq: %p, sseq %p, {%u,%u}, key %u\n",
389 nseq, sseq, nseq->type, inst, key);
391 /* Remove publication from zone scope list */
393 prev = sseq->zone_list;
394 publ = sseq->zone_list->zone_list_next;
395 while ((publ->key != key) || (publ->ref != ref) ||
396 (publ->node && (publ->node != node))) {
398 publ = publ->zone_list_next;
399 if (prev == sseq->zone_list) {
401 /* Prevent endless loop if publication not found */
406 if (publ != sseq->zone_list)
407 prev->zone_list_next = publ->zone_list_next;
408 else if (publ->zone_list_next != publ) {
409 prev->zone_list_next = publ->zone_list_next;
410 sseq->zone_list = publ->zone_list_next;
412 sseq->zone_list = NULL;
415 /* Remove publication from cluster scope list, if present */
417 if (in_own_cluster(node)) {
418 prev = sseq->cluster_list;
419 curr = sseq->cluster_list->cluster_list_next;
420 while (curr != publ) {
422 curr = curr->cluster_list_next;
423 if (prev == sseq->cluster_list) {
425 /* Prevent endless loop for malformed list */
427 err("Unable to de-list cluster publication\n"
428 "{%u%u}, node=0x%x, ref=%u, key=%u)\n",
429 publ->type, publ->lower, publ->node,
430 publ->ref, publ->key);
434 if (publ != sseq->cluster_list)
435 prev->cluster_list_next = publ->cluster_list_next;
436 else if (publ->cluster_list_next != publ) {
437 prev->cluster_list_next = publ->cluster_list_next;
438 sseq->cluster_list = publ->cluster_list_next;
440 sseq->cluster_list = NULL;
445 /* Remove publication from node scope list, if present */
447 if (node == tipc_own_addr) {
448 prev = sseq->node_list;
449 curr = sseq->node_list->node_list_next;
450 while (curr != publ) {
452 curr = curr->node_list_next;
453 if (prev == sseq->node_list) {
455 /* Prevent endless loop for malformed list */
457 err("Unable to de-list node publication\n"
458 "{%u%u}, node=0x%x, ref=%u, key=%u)\n",
459 publ->type, publ->lower, publ->node,
460 publ->ref, publ->key);
464 if (publ != sseq->node_list)
465 prev->node_list_next = publ->node_list_next;
466 else if (publ->node_list_next != publ) {
467 prev->node_list_next = publ->node_list_next;
468 sseq->node_list = publ->node_list_next;
470 sseq->node_list = NULL;
475 /* Contract subseq list if no more publications for that subseq */
477 if (!sseq->zone_list) {
478 free = &nseq->sseqs[nseq->first_free--];
479 memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof (*sseq));
483 /* Notify any waiting subscriptions */
485 list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
486 tipc_subscr_report_overlap(s,
499 * tipc_nameseq_subscribe: attach a subscription, and issue
500 * the prescribed number of events if there is any sub-
501 * sequence overlapping with the requested sequence
504 static void tipc_nameseq_subscribe(struct name_seq *nseq, struct subscription *s)
506 struct sub_seq *sseq = nseq->sseqs;
508 list_add(&s->nameseq_list, &nseq->subscriptions);
513 while (sseq != &nseq->sseqs[nseq->first_free]) {
514 struct publication *zl = sseq->zone_list;
515 if (zl && tipc_subscr_overlap(s,sseq->lower,sseq->upper)) {
516 struct publication *crs = zl;
520 tipc_subscr_report_overlap(s,
528 crs = crs->zone_list_next;
535 static struct name_seq *nametbl_find_seq(u32 type)
537 struct hlist_head *seq_head;
538 struct hlist_node *seq_node;
541 dbg("find_seq %u,(%u,0x%x) table = %p, hash[type] = %u\n",
542 type, ntohl(type), type, table.types, hash(type));
544 seq_head = &table.types[hash(type)];
545 hlist_for_each_entry(ns, seq_node, seq_head, ns_list) {
546 if (ns->type == type) {
547 dbg("found %p\n", ns);
555 struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
556 u32 scope, u32 node, u32 port, u32 key)
558 struct name_seq *seq = nametbl_find_seq(type);
560 dbg("tipc_nametbl_insert_publ: {%u,%u,%u} found %p\n", type, lower, upper, seq);
562 warn("Failed to publish illegal {%u,%u,%u}\n",
567 dbg("Publishing {%u,%u,%u} from 0x%x\n", type, lower, upper, node);
569 seq = tipc_nameseq_create(type, &table.types[hash(type)]);
570 dbg("tipc_nametbl_insert_publ: created %p\n", seq);
575 return tipc_nameseq_insert_publ(seq, type, lower, upper,
576 scope, node, port, key);
579 struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
580 u32 node, u32 ref, u32 key)
582 struct publication *publ;
583 struct name_seq *seq = nametbl_find_seq(type);
588 dbg("Withdrawing {%u,%u} from 0x%x\n", type, lower, node);
589 publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
591 if (!seq->first_free && list_empty(&seq->subscriptions)) {
592 hlist_del_init(&seq->ns_list);
600 * tipc_nametbl_translate(): Translate tipc_name -> tipc_portid.
601 * Very time-critical.
603 * Note: on entry 'destnode' is the search domain used during translation;
604 * on exit it passes back the node address of the matching port (if any)
607 u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
609 struct sub_seq *sseq;
610 struct publication *publ = NULL;
611 struct name_seq *seq;
614 if (!in_scope(*destnode, tipc_own_addr))
617 read_lock_bh(&tipc_nametbl_lock);
618 seq = nametbl_find_seq(type);
621 sseq = nameseq_find_subseq(seq, instance);
624 spin_lock_bh(&seq->lock);
626 /* Closest-First Algorithm: */
627 if (likely(!*destnode)) {
628 publ = sseq->node_list;
630 sseq->node_list = publ->node_list_next;
633 *destnode = publ->node;
634 spin_unlock_bh(&seq->lock);
635 read_unlock_bh(&tipc_nametbl_lock);
638 publ = sseq->cluster_list;
640 sseq->cluster_list = publ->cluster_list_next;
643 publ = sseq->zone_list;
645 sseq->zone_list = publ->zone_list_next;
650 /* Round-Robin Algorithm: */
651 else if (*destnode == tipc_own_addr) {
652 publ = sseq->node_list;
654 sseq->node_list = publ->node_list_next;
657 } else if (in_own_cluster(*destnode)) {
658 publ = sseq->cluster_list;
660 sseq->cluster_list = publ->cluster_list_next;
664 publ = sseq->zone_list;
666 sseq->zone_list = publ->zone_list_next;
670 spin_unlock_bh(&seq->lock);
673 read_unlock_bh(&tipc_nametbl_lock);
678 * tipc_nametbl_mc_translate - find multicast destinations
680 * Creates list of all local ports that overlap the given multicast address;
681 * also determines if any off-node ports overlap.
683 * Note: Publications with a scope narrower than 'limit' are ignored.
684 * (i.e. local node-scope publications mustn't receive messages arriving
685 * from another node, even if the multcast link brought it here)
687 * Returns non-zero if any off-node ports overlap
690 int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,
691 struct port_list *dports)
693 struct name_seq *seq;
694 struct sub_seq *sseq;
695 struct sub_seq *sseq_stop;
698 read_lock_bh(&tipc_nametbl_lock);
699 seq = nametbl_find_seq(type);
703 spin_lock_bh(&seq->lock);
705 sseq = seq->sseqs + nameseq_locate_subseq(seq, lower);
706 sseq_stop = seq->sseqs + seq->first_free;
707 for (; sseq != sseq_stop; sseq++) {
708 struct publication *publ;
710 if (sseq->lower > upper)
712 publ = sseq->cluster_list;
713 if (publ && (publ->scope <= limit))
715 if (publ->node == tipc_own_addr)
716 tipc_port_list_add(dports, publ->ref);
719 publ = publ->cluster_list_next;
720 } while (publ != sseq->cluster_list);
723 spin_unlock_bh(&seq->lock);
725 read_unlock_bh(&tipc_nametbl_lock);
730 * tipc_nametbl_publish_rsv - publish port name using a reserved name type
733 int tipc_nametbl_publish_rsv(u32 ref, unsigned int scope,
734 struct tipc_name_seq const *seq)
738 atomic_inc(&rsv_publ_ok);
739 res = tipc_publish(ref, scope, seq);
740 atomic_dec(&rsv_publ_ok);
745 * tipc_nametbl_publish - add name publication to network name tables
748 struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
749 u32 scope, u32 port_ref, u32 key)
751 struct publication *publ;
753 if (table.local_publ_count >= tipc_max_publications) {
754 warn("Publication failed, local publication limit reached (%u)\n",
755 tipc_max_publications);
758 if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {
759 warn("Publication failed, reserved name {%u,%u,%u}\n",
764 write_lock_bh(&tipc_nametbl_lock);
765 table.local_publ_count++;
766 publ = tipc_nametbl_insert_publ(type, lower, upper, scope,
767 tipc_own_addr, port_ref, key);
768 if (publ && (scope != TIPC_NODE_SCOPE)) {
769 tipc_named_publish(publ);
771 write_unlock_bh(&tipc_nametbl_lock);
776 * tipc_nametbl_withdraw - withdraw name publication from network name tables
779 int tipc_nametbl_withdraw(u32 type, u32 lower, u32 ref, u32 key)
781 struct publication *publ;
783 dbg("tipc_nametbl_withdraw: {%u,%u}, key=%u\n", type, lower, key);
784 write_lock_bh(&tipc_nametbl_lock);
785 publ = tipc_nametbl_remove_publ(type, lower, tipc_own_addr, ref, key);
787 table.local_publ_count--;
788 if (publ->scope != TIPC_NODE_SCOPE)
789 tipc_named_withdraw(publ);
790 write_unlock_bh(&tipc_nametbl_lock);
791 list_del_init(&publ->pport_list);
795 write_unlock_bh(&tipc_nametbl_lock);
796 err("Unable to remove local publication\n"
797 "(type=%u, lower=%u, ref=%u, key=%u)\n",
798 type, lower, ref, key);
803 * tipc_nametbl_subscribe - add a subscription object to the name table
806 void tipc_nametbl_subscribe(struct subscription *s)
808 u32 type = s->seq.type;
809 struct name_seq *seq;
811 write_lock_bh(&tipc_nametbl_lock);
812 seq = nametbl_find_seq(type);
814 seq = tipc_nameseq_create(type, &table.types[hash(type)]);
817 spin_lock_bh(&seq->lock);
818 dbg("tipc_nametbl_subscribe:found %p for {%u,%u,%u}\n",
819 seq, type, s->seq.lower, s->seq.upper);
820 tipc_nameseq_subscribe(seq, s);
821 spin_unlock_bh(&seq->lock);
823 warn("Failed to create subscription for {%u,%u,%u}\n",
824 s->seq.type, s->seq.lower, s->seq.upper);
826 write_unlock_bh(&tipc_nametbl_lock);
830 * tipc_nametbl_unsubscribe - remove a subscription object from name table
833 void tipc_nametbl_unsubscribe(struct subscription *s)
835 struct name_seq *seq;
837 write_lock_bh(&tipc_nametbl_lock);
838 seq = nametbl_find_seq(s->seq.type);
840 spin_lock_bh(&seq->lock);
841 list_del_init(&s->nameseq_list);
842 spin_unlock_bh(&seq->lock);
843 if ((seq->first_free == 0) && list_empty(&seq->subscriptions)) {
844 hlist_del_init(&seq->ns_list);
849 write_unlock_bh(&tipc_nametbl_lock);
854 * subseq_list: print specified sub-sequence contents into the given buffer
857 static void subseq_list(struct sub_seq *sseq, struct print_buf *buf, u32 depth,
862 struct publication *publ = sseq->zone_list;
864 tipc_printf(buf, "%-10u %-10u ", sseq->lower, sseq->upper);
866 if (depth == 2 || !publ) {
867 tipc_printf(buf, "\n");
872 sprintf (portIdStr, "<%u.%u.%u:%u>",
873 tipc_zone(publ->node), tipc_cluster(publ->node),
874 tipc_node(publ->node), publ->ref);
875 tipc_printf(buf, "%-26s ", portIdStr);
877 if (publ->node != tipc_own_addr)
879 else if (publ->scope == TIPC_NODE_SCOPE)
881 else if (publ->scope == TIPC_CLUSTER_SCOPE)
882 scopeStr = "cluster";
885 tipc_printf(buf, "%-10u %s", publ->key, scopeStr);
888 publ = publ->zone_list_next;
889 if (publ == sseq->zone_list)
892 tipc_printf(buf, "\n%33s", " ");
895 tipc_printf(buf, "\n");
899 * nameseq_list: print specified name sequence contents into the given buffer
902 static void nameseq_list(struct name_seq *seq, struct print_buf *buf, u32 depth,
903 u32 type, u32 lowbound, u32 upbound, u32 index)
905 struct sub_seq *sseq;
908 sprintf(typearea, "%-10u", seq->type);
911 tipc_printf(buf, "%s\n", typearea);
915 for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) {
916 if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) {
917 tipc_printf(buf, "%s ", typearea);
918 subseq_list(sseq, buf, depth, index);
919 sprintf(typearea, "%10s", " ");
925 * nametbl_header - print name table header into the given buffer
928 static void nametbl_header(struct print_buf *buf, u32 depth)
930 tipc_printf(buf, "Type ");
933 tipc_printf(buf, "Lower Upper ");
935 tipc_printf(buf, "Port Identity ");
937 tipc_printf(buf, "Publication");
939 tipc_printf(buf, "\n-----------");
942 tipc_printf(buf, "--------------------- ");
944 tipc_printf(buf, "-------------------------- ");
946 tipc_printf(buf, "------------------");
948 tipc_printf(buf, "\n");
952 * nametbl_list - print specified name table contents into the given buffer
955 static void nametbl_list(struct print_buf *buf, u32 depth_info,
956 u32 type, u32 lowbound, u32 upbound)
958 struct hlist_head *seq_head;
959 struct hlist_node *seq_node;
960 struct name_seq *seq;
965 all_types = (depth_info & TIPC_NTQ_ALLTYPES);
966 depth = (depth_info & ~TIPC_NTQ_ALLTYPES);
972 /* display all entries in name table to specified depth */
973 nametbl_header(buf, depth);
976 for (i = 0; i < tipc_nametbl_size; i++) {
977 seq_head = &table.types[i];
978 hlist_for_each_entry(seq, seq_node, seq_head, ns_list) {
979 nameseq_list(seq, buf, depth, seq->type,
980 lowbound, upbound, i);
984 /* display only the sequence that matches the specified type */
985 if (upbound < lowbound) {
986 tipc_printf(buf, "invalid name sequence specified\n");
989 nametbl_header(buf, depth);
991 seq_head = &table.types[i];
992 hlist_for_each_entry(seq, seq_node, seq_head, ns_list) {
993 if (seq->type == type) {
994 nameseq_list(seq, buf, depth, type,
995 lowbound, upbound, i);
1003 void tipc_nametbl_print(struct print_buf *buf, const char *str)
1005 tipc_printf(buf, str);
1006 read_lock_bh(&tipc_nametbl_lock);
1007 nametbl_list(buf, 0, 0, 0, 0);
1008 read_unlock_bh(&tipc_nametbl_lock);
1012 #define MAX_NAME_TBL_QUERY 32768
1014 struct sk_buff *tipc_nametbl_get(const void *req_tlv_area, int req_tlv_space)
1016 struct sk_buff *buf;
1017 struct tipc_name_table_query *argv;
1018 struct tlv_desc *rep_tlv;
1022 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NAME_TBL_QUERY))
1023 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
1025 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_NAME_TBL_QUERY));
1029 rep_tlv = (struct tlv_desc *)buf->data;
1030 tipc_printbuf_init(&b, TLV_DATA(rep_tlv), MAX_NAME_TBL_QUERY);
1031 argv = (struct tipc_name_table_query *)TLV_DATA(req_tlv_area);
1032 read_lock_bh(&tipc_nametbl_lock);
1033 nametbl_list(&b, ntohl(argv->depth), ntohl(argv->type),
1034 ntohl(argv->lowbound), ntohl(argv->upbound));
1035 read_unlock_bh(&tipc_nametbl_lock);
1036 str_len = tipc_printbuf_validate(&b);
1038 skb_put(buf, TLV_SPACE(str_len));
1039 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
1045 void tipc_nametbl_dump(void)
1047 nametbl_list(TIPC_CONS, 0, 0, 0, 0);
1051 int tipc_nametbl_init(void)
1053 int array_size = sizeof(struct hlist_head) * tipc_nametbl_size;
1055 table.types = kzalloc(array_size, GFP_ATOMIC);
1059 write_lock_bh(&tipc_nametbl_lock);
1060 table.local_publ_count = 0;
1061 write_unlock_bh(&tipc_nametbl_lock);
1065 void tipc_nametbl_stop(void)
1072 /* Verify name table is empty, then release it */
1074 write_lock_bh(&tipc_nametbl_lock);
1075 for (i = 0; i < tipc_nametbl_size; i++) {
1076 if (!hlist_empty(&table.types[i]))
1077 err("tipc_nametbl_stop(): hash chain %u is non-null\n", i);
1081 write_unlock_bh(&tipc_nametbl_lock);