2 * net/tipc/name_table.c: TIPC name table code
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2004-2008, Wind River Systems
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9 * modification, are permitted provided that the following conditions are met:
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12 * notice, this list of conditions and the following disclaimer.
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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
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29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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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 publications made by own node
56 * @cluster_list: circular list of publications made by own cluster
57 * @zone_list: circular list of publications made by own zone
58 * @node_list_size: number of entries in "node_list"
59 * @cluster_list_size: number of entries in "cluster_list"
60 * @zone_list_size: number of entries in "zone_list"
62 * Note: The zone list always contains at least one entry, since all
63 * publications of the associated name sequence belong to it.
64 * (The cluster and node lists may be empty.)
70 struct publication *node_list;
71 struct publication *cluster_list;
72 struct publication *zone_list;
74 u32 cluster_list_size;
79 * struct name_seq - container for all published instances of a name type
80 * @type: 32 bit 'type' value for name sequence
81 * @sseq: pointer to dynamically-sized array of sub-sequences of this 'type';
82 * sub-sequences are sorted in ascending order
83 * @alloc: number of sub-sequences currently in array
84 * @first_free: array index of first unused sub-sequence entry
85 * @ns_list: links to adjacent name sequences in hash chain
86 * @subscriptions: list of subscriptions for this 'type'
87 * @lock: spinlock controlling access to publication lists of all sub-sequences
92 struct sub_seq *sseqs;
95 struct hlist_node ns_list;
96 struct list_head subscriptions;
101 * struct name_table - table containing all existing port name publications
102 * @types: pointer to fixed-sized array of name sequence lists,
103 * accessed via hashing on 'type'; name sequence lists are *not* sorted
104 * @local_publ_count: number of publications issued by this node
108 struct hlist_head *types;
109 u32 local_publ_count;
112 static struct name_table table = { NULL } ;
113 static atomic_t rsv_publ_ok = ATOMIC_INIT(0);
114 DEFINE_RWLOCK(tipc_nametbl_lock);
117 static int hash(int x)
119 return(x & (tipc_nametbl_size - 1));
123 * publ_create - create a publication structure
126 static struct publication *publ_create(u32 type, u32 lower, u32 upper,
127 u32 scope, u32 node, u32 port_ref,
130 struct publication *publ = kzalloc(sizeof(*publ), GFP_ATOMIC);
132 warn("Publication creation failure, no memory\n");
141 publ->ref = port_ref;
143 INIT_LIST_HEAD(&publ->local_list);
144 INIT_LIST_HEAD(&publ->pport_list);
145 INIT_LIST_HEAD(&publ->subscr.nodesub_list);
150 * tipc_subseq_alloc - allocate a specified number of sub-sequence structures
153 static struct sub_seq *tipc_subseq_alloc(u32 cnt)
155 struct sub_seq *sseq = kcalloc(cnt, sizeof(struct sub_seq), GFP_ATOMIC);
160 * tipc_nameseq_create - create a name sequence structure for the specified 'type'
162 * Allocates a single sub-sequence structure and sets it to all 0's.
165 static struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head)
167 struct name_seq *nseq = kzalloc(sizeof(*nseq), GFP_ATOMIC);
168 struct sub_seq *sseq = tipc_subseq_alloc(1);
170 if (!nseq || !sseq) {
171 warn("Name sequence creation failed, no memory\n");
177 spin_lock_init(&nseq->lock);
180 dbg("tipc_nameseq_create(): nseq = %p, type %u, ssseqs %p, ff: %u\n",
181 nseq, type, nseq->sseqs, nseq->first_free);
183 INIT_HLIST_NODE(&nseq->ns_list);
184 INIT_LIST_HEAD(&nseq->subscriptions);
185 hlist_add_head(&nseq->ns_list, seq_head);
190 * nameseq_find_subseq - find sub-sequence (if any) matching a name instance
192 * Very time-critical, so binary searches through sub-sequence array.
195 static struct sub_seq *nameseq_find_subseq(struct name_seq *nseq,
198 struct sub_seq *sseqs = nseq->sseqs;
200 int high = nseq->first_free - 1;
203 while (low <= high) {
204 mid = (low + high) / 2;
205 if (instance < sseqs[mid].lower)
207 else if (instance > sseqs[mid].upper)
216 * nameseq_locate_subseq - determine position of name instance in sub-sequence
218 * Returns index in sub-sequence array of the entry that contains the specified
219 * instance value; if no entry contains that value, returns the position
220 * where a new entry for it would be inserted in the array.
222 * Note: Similar to binary search code for locating a sub-sequence.
225 static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance)
227 struct sub_seq *sseqs = nseq->sseqs;
229 int high = nseq->first_free - 1;
232 while (low <= high) {
233 mid = (low + high) / 2;
234 if (instance < sseqs[mid].lower)
236 else if (instance > sseqs[mid].upper)
245 * tipc_nameseq_insert_publ -
248 static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
249 u32 type, u32 lower, u32 upper,
250 u32 scope, u32 node, u32 port, u32 key)
252 struct subscription *s;
253 struct subscription *st;
254 struct publication *publ;
255 struct sub_seq *sseq;
256 int created_subseq = 0;
258 sseq = nameseq_find_subseq(nseq, lower);
259 dbg("nameseq_ins: for seq %p, {%u,%u}, found sseq %p\n",
260 nseq, type, lower, sseq);
263 /* Lower end overlaps existing entry => need an exact match */
265 if ((sseq->lower != lower) || (sseq->upper != upper)) {
266 warn("Cannot publish {%u,%u,%u}, overlap error\n",
272 struct sub_seq *freesseq;
274 /* Find where lower end should be inserted */
276 inspos = nameseq_locate_subseq(nseq, lower);
278 /* Fail if upper end overlaps into an existing entry */
280 if ((inspos < nseq->first_free) &&
281 (upper >= nseq->sseqs[inspos].lower)) {
282 warn("Cannot publish {%u,%u,%u}, overlap error\n",
287 /* Ensure there is space for new sub-sequence */
289 if (nseq->first_free == nseq->alloc) {
290 struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2);
293 warn("Cannot publish {%u,%u,%u}, no memory\n",
297 dbg("Allocated %u more sseqs\n", nseq->alloc);
298 memcpy(sseqs, nseq->sseqs,
299 nseq->alloc * sizeof(struct sub_seq));
304 dbg("Have %u sseqs for type %u\n", nseq->alloc, type);
306 /* Insert new sub-sequence */
308 dbg("ins in pos %u, ff = %u\n", inspos, nseq->first_free);
309 sseq = &nseq->sseqs[inspos];
310 freesseq = &nseq->sseqs[nseq->first_free];
311 memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof (*sseq));
312 memset(sseq, 0, sizeof (*sseq));
318 dbg("inserting {%u,%u,%u} from <0x%x:%u> into sseq %p(%u,%u) of seq %p\n",
319 type, lower, upper, node, port, sseq,
320 sseq->lower, sseq->upper, nseq);
322 /* Insert a publication: */
324 publ = publ_create(type, lower, upper, scope, node, port, key);
327 dbg("inserting publ %p, node=0x%x publ->node=0x%x, subscr->node=%p\n",
328 publ, node, publ->node, publ->subscr.node);
330 sseq->zone_list_size++;
331 if (!sseq->zone_list)
332 sseq->zone_list = publ->zone_list_next = publ;
334 publ->zone_list_next = sseq->zone_list->zone_list_next;
335 sseq->zone_list->zone_list_next = publ;
338 if (in_own_cluster(node)) {
339 sseq->cluster_list_size++;
340 if (!sseq->cluster_list)
341 sseq->cluster_list = publ->cluster_list_next = publ;
343 publ->cluster_list_next =
344 sseq->cluster_list->cluster_list_next;
345 sseq->cluster_list->cluster_list_next = publ;
349 if (node == tipc_own_addr) {
350 sseq->node_list_size++;
351 if (!sseq->node_list)
352 sseq->node_list = publ->node_list_next = publ;
354 publ->node_list_next = sseq->node_list->node_list_next;
355 sseq->node_list->node_list_next = publ;
360 * Any subscriptions waiting for notification?
362 list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
363 dbg("calling report_overlap()\n");
364 tipc_subscr_report_overlap(s,
376 * tipc_nameseq_remove_publ -
378 * NOTE: There may be cases where TIPC is asked to remove a publication
379 * that is not in the name table. For example, if another node issues a
380 * publication for a name sequence that overlaps an existing name sequence
381 * the publication will not be recorded, which means the publication won't
382 * be found when the name sequence is later withdrawn by that node.
383 * A failed withdraw request simply returns a failure indication and lets the
384 * caller issue any error or warning messages associated with such a problem.
387 static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
388 u32 node, u32 ref, u32 key)
390 struct publication *publ;
391 struct publication *curr;
392 struct publication *prev;
393 struct sub_seq *sseq = nameseq_find_subseq(nseq, inst);
394 struct sub_seq *free;
395 struct subscription *s, *st;
396 int removed_subseq = 0;
401 dbg("tipc_nameseq_remove_publ: seq: %p, sseq %p, {%u,%u}, key %u\n",
402 nseq, sseq, nseq->type, inst, key);
404 /* Remove publication from zone scope list */
406 prev = sseq->zone_list;
407 publ = sseq->zone_list->zone_list_next;
408 while ((publ->key != key) || (publ->ref != ref) ||
409 (publ->node && (publ->node != node))) {
411 publ = publ->zone_list_next;
412 if (prev == sseq->zone_list) {
414 /* Prevent endless loop if publication not found */
419 if (publ != sseq->zone_list)
420 prev->zone_list_next = publ->zone_list_next;
421 else if (publ->zone_list_next != publ) {
422 prev->zone_list_next = publ->zone_list_next;
423 sseq->zone_list = publ->zone_list_next;
425 sseq->zone_list = NULL;
427 sseq->zone_list_size--;
429 /* Remove publication from cluster scope list, if present */
431 if (in_own_cluster(node)) {
432 prev = sseq->cluster_list;
433 curr = sseq->cluster_list->cluster_list_next;
434 while (curr != publ) {
436 curr = curr->cluster_list_next;
437 if (prev == sseq->cluster_list) {
439 /* Prevent endless loop for malformed list */
441 err("Unable to de-list cluster publication\n"
442 "{%u%u}, node=0x%x, ref=%u, key=%u)\n",
443 publ->type, publ->lower, publ->node,
444 publ->ref, publ->key);
448 if (publ != sseq->cluster_list)
449 prev->cluster_list_next = publ->cluster_list_next;
450 else if (publ->cluster_list_next != publ) {
451 prev->cluster_list_next = publ->cluster_list_next;
452 sseq->cluster_list = publ->cluster_list_next;
454 sseq->cluster_list = NULL;
456 sseq->cluster_list_size--;
460 /* Remove publication from node scope list, if present */
462 if (node == tipc_own_addr) {
463 prev = sseq->node_list;
464 curr = sseq->node_list->node_list_next;
465 while (curr != publ) {
467 curr = curr->node_list_next;
468 if (prev == sseq->node_list) {
470 /* Prevent endless loop for malformed list */
472 err("Unable to de-list node publication\n"
473 "{%u%u}, node=0x%x, ref=%u, key=%u)\n",
474 publ->type, publ->lower, publ->node,
475 publ->ref, publ->key);
479 if (publ != sseq->node_list)
480 prev->node_list_next = publ->node_list_next;
481 else if (publ->node_list_next != publ) {
482 prev->node_list_next = publ->node_list_next;
483 sseq->node_list = publ->node_list_next;
485 sseq->node_list = NULL;
487 sseq->node_list_size--;
491 /* Contract subseq list if no more publications for that subseq */
493 if (!sseq->zone_list) {
494 free = &nseq->sseqs[nseq->first_free--];
495 memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof (*sseq));
499 /* Notify any waiting subscriptions */
501 list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
502 tipc_subscr_report_overlap(s,
515 * tipc_nameseq_subscribe: attach a subscription, and issue
516 * the prescribed number of events if there is any sub-
517 * sequence overlapping with the requested sequence
520 static void tipc_nameseq_subscribe(struct name_seq *nseq, struct subscription *s)
522 struct sub_seq *sseq = nseq->sseqs;
524 list_add(&s->nameseq_list, &nseq->subscriptions);
529 while (sseq != &nseq->sseqs[nseq->first_free]) {
530 struct publication *zl = sseq->zone_list;
531 if (zl && tipc_subscr_overlap(s,sseq->lower,sseq->upper)) {
532 struct publication *crs = zl;
536 tipc_subscr_report_overlap(s,
544 crs = crs->zone_list_next;
551 static struct name_seq *nametbl_find_seq(u32 type)
553 struct hlist_head *seq_head;
554 struct hlist_node *seq_node;
557 dbg("find_seq %u,(%u,0x%x) table = %p, hash[type] = %u\n",
558 type, htonl(type), type, table.types, hash(type));
560 seq_head = &table.types[hash(type)];
561 hlist_for_each_entry(ns, seq_node, seq_head, ns_list) {
562 if (ns->type == type) {
563 dbg("found %p\n", ns);
571 struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
572 u32 scope, u32 node, u32 port, u32 key)
574 struct name_seq *seq = nametbl_find_seq(type);
576 dbg("tipc_nametbl_insert_publ: {%u,%u,%u} found %p\n", type, lower, upper, seq);
578 warn("Failed to publish illegal {%u,%u,%u}\n",
583 dbg("Publishing {%u,%u,%u} from 0x%x\n", type, lower, upper, node);
585 seq = tipc_nameseq_create(type, &table.types[hash(type)]);
586 dbg("tipc_nametbl_insert_publ: created %p\n", seq);
591 return tipc_nameseq_insert_publ(seq, type, lower, upper,
592 scope, node, port, key);
595 struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
596 u32 node, u32 ref, u32 key)
598 struct publication *publ;
599 struct name_seq *seq = nametbl_find_seq(type);
604 dbg("Withdrawing {%u,%u} from 0x%x\n", type, lower, node);
605 publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
607 if (!seq->first_free && list_empty(&seq->subscriptions)) {
608 hlist_del_init(&seq->ns_list);
616 * tipc_nametbl_translate(): Translate tipc_name -> tipc_portid.
617 * Very time-critical.
619 * Note: on entry 'destnode' is the search domain used during translation;
620 * on exit it passes back the node address of the matching port (if any)
623 u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
625 struct sub_seq *sseq;
626 struct publication *publ = NULL;
627 struct name_seq *seq;
630 if (!in_scope(*destnode, tipc_own_addr))
633 read_lock_bh(&tipc_nametbl_lock);
634 seq = nametbl_find_seq(type);
637 sseq = nameseq_find_subseq(seq, instance);
640 spin_lock_bh(&seq->lock);
642 /* Closest-First Algorithm: */
643 if (likely(!*destnode)) {
644 publ = sseq->node_list;
646 sseq->node_list = publ->node_list_next;
649 *destnode = publ->node;
650 spin_unlock_bh(&seq->lock);
651 read_unlock_bh(&tipc_nametbl_lock);
654 publ = sseq->cluster_list;
656 sseq->cluster_list = publ->cluster_list_next;
659 publ = sseq->zone_list;
661 sseq->zone_list = publ->zone_list_next;
666 /* Round-Robin Algorithm: */
667 else if (*destnode == tipc_own_addr) {
668 publ = sseq->node_list;
670 sseq->node_list = publ->node_list_next;
673 } else if (in_own_cluster(*destnode)) {
674 publ = sseq->cluster_list;
676 sseq->cluster_list = publ->cluster_list_next;
680 publ = sseq->zone_list;
682 sseq->zone_list = publ->zone_list_next;
686 spin_unlock_bh(&seq->lock);
689 read_unlock_bh(&tipc_nametbl_lock);
694 * tipc_nametbl_mc_translate - find multicast destinations
696 * Creates list of all local ports that overlap the given multicast address;
697 * also determines if any off-node ports overlap.
699 * Note: Publications with a scope narrower than 'limit' are ignored.
700 * (i.e. local node-scope publications mustn't receive messages arriving
701 * from another node, even if the multcast link brought it here)
703 * Returns non-zero if any off-node ports overlap
706 int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,
707 struct port_list *dports)
709 struct name_seq *seq;
710 struct sub_seq *sseq;
711 struct sub_seq *sseq_stop;
714 read_lock_bh(&tipc_nametbl_lock);
715 seq = nametbl_find_seq(type);
719 spin_lock_bh(&seq->lock);
721 sseq = seq->sseqs + nameseq_locate_subseq(seq, lower);
722 sseq_stop = seq->sseqs + seq->first_free;
723 for (; sseq != sseq_stop; sseq++) {
724 struct publication *publ;
726 if (sseq->lower > upper)
729 publ = sseq->node_list;
732 if (publ->scope <= limit)
733 tipc_port_list_add(dports, publ->ref);
734 publ = publ->node_list_next;
735 } while (publ != sseq->node_list);
738 if (sseq->cluster_list_size != sseq->node_list_size)
742 spin_unlock_bh(&seq->lock);
744 read_unlock_bh(&tipc_nametbl_lock);
749 * tipc_nametbl_publish_rsv - publish port name using a reserved name type
752 int tipc_nametbl_publish_rsv(u32 ref, unsigned int scope,
753 struct tipc_name_seq const *seq)
757 atomic_inc(&rsv_publ_ok);
758 res = tipc_publish(ref, scope, seq);
759 atomic_dec(&rsv_publ_ok);
764 * tipc_nametbl_publish - add name publication to network name tables
767 struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
768 u32 scope, u32 port_ref, u32 key)
770 struct publication *publ;
772 if (table.local_publ_count >= tipc_max_publications) {
773 warn("Publication failed, local publication limit reached (%u)\n",
774 tipc_max_publications);
777 if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {
778 warn("Publication failed, reserved name {%u,%u,%u}\n",
783 write_lock_bh(&tipc_nametbl_lock);
784 table.local_publ_count++;
785 publ = tipc_nametbl_insert_publ(type, lower, upper, scope,
786 tipc_own_addr, port_ref, key);
787 if (publ && (scope != TIPC_NODE_SCOPE)) {
788 tipc_named_publish(publ);
790 write_unlock_bh(&tipc_nametbl_lock);
795 * tipc_nametbl_withdraw - withdraw name publication from network name tables
798 int tipc_nametbl_withdraw(u32 type, u32 lower, u32 ref, u32 key)
800 struct publication *publ;
802 dbg("tipc_nametbl_withdraw: {%u,%u}, key=%u\n", type, lower, key);
803 write_lock_bh(&tipc_nametbl_lock);
804 publ = tipc_nametbl_remove_publ(type, lower, tipc_own_addr, ref, key);
806 table.local_publ_count--;
807 if (publ->scope != TIPC_NODE_SCOPE)
808 tipc_named_withdraw(publ);
809 write_unlock_bh(&tipc_nametbl_lock);
810 list_del_init(&publ->pport_list);
814 write_unlock_bh(&tipc_nametbl_lock);
815 err("Unable to remove local publication\n"
816 "(type=%u, lower=%u, ref=%u, key=%u)\n",
817 type, lower, ref, key);
822 * tipc_nametbl_subscribe - add a subscription object to the name table
825 void tipc_nametbl_subscribe(struct subscription *s)
827 u32 type = s->seq.type;
828 struct name_seq *seq;
830 write_lock_bh(&tipc_nametbl_lock);
831 seq = nametbl_find_seq(type);
833 seq = tipc_nameseq_create(type, &table.types[hash(type)]);
836 spin_lock_bh(&seq->lock);
837 dbg("tipc_nametbl_subscribe:found %p for {%u,%u,%u}\n",
838 seq, type, s->seq.lower, s->seq.upper);
839 tipc_nameseq_subscribe(seq, s);
840 spin_unlock_bh(&seq->lock);
842 warn("Failed to create subscription for {%u,%u,%u}\n",
843 s->seq.type, s->seq.lower, s->seq.upper);
845 write_unlock_bh(&tipc_nametbl_lock);
849 * tipc_nametbl_unsubscribe - remove a subscription object from name table
852 void tipc_nametbl_unsubscribe(struct subscription *s)
854 struct name_seq *seq;
856 write_lock_bh(&tipc_nametbl_lock);
857 seq = nametbl_find_seq(s->seq.type);
859 spin_lock_bh(&seq->lock);
860 list_del_init(&s->nameseq_list);
861 spin_unlock_bh(&seq->lock);
862 if ((seq->first_free == 0) && list_empty(&seq->subscriptions)) {
863 hlist_del_init(&seq->ns_list);
868 write_unlock_bh(&tipc_nametbl_lock);
873 * subseq_list: print specified sub-sequence contents into the given buffer
876 static void subseq_list(struct sub_seq *sseq, struct print_buf *buf, u32 depth,
881 struct publication *publ = sseq->zone_list;
883 tipc_printf(buf, "%-10u %-10u ", sseq->lower, sseq->upper);
885 if (depth == 2 || !publ) {
886 tipc_printf(buf, "\n");
891 sprintf (portIdStr, "<%u.%u.%u:%u>",
892 tipc_zone(publ->node), tipc_cluster(publ->node),
893 tipc_node(publ->node), publ->ref);
894 tipc_printf(buf, "%-26s ", portIdStr);
896 if (publ->node != tipc_own_addr)
898 else if (publ->scope == TIPC_NODE_SCOPE)
900 else if (publ->scope == TIPC_CLUSTER_SCOPE)
901 scopeStr = "cluster";
904 tipc_printf(buf, "%-10u %s", publ->key, scopeStr);
907 publ = publ->zone_list_next;
908 if (publ == sseq->zone_list)
911 tipc_printf(buf, "\n%33s", " ");
914 tipc_printf(buf, "\n");
918 * nameseq_list: print specified name sequence contents into the given buffer
921 static void nameseq_list(struct name_seq *seq, struct print_buf *buf, u32 depth,
922 u32 type, u32 lowbound, u32 upbound, u32 index)
924 struct sub_seq *sseq;
927 if (seq->first_free == 0)
930 sprintf(typearea, "%-10u", seq->type);
933 tipc_printf(buf, "%s\n", typearea);
937 for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) {
938 if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) {
939 tipc_printf(buf, "%s ", typearea);
940 spin_lock_bh(&seq->lock);
941 subseq_list(sseq, buf, depth, index);
942 spin_unlock_bh(&seq->lock);
943 sprintf(typearea, "%10s", " ");
949 * nametbl_header - print name table header into the given buffer
952 static void nametbl_header(struct print_buf *buf, u32 depth)
954 tipc_printf(buf, "Type ");
957 tipc_printf(buf, "Lower Upper ");
959 tipc_printf(buf, "Port Identity ");
961 tipc_printf(buf, "Publication");
963 tipc_printf(buf, "\n-----------");
966 tipc_printf(buf, "--------------------- ");
968 tipc_printf(buf, "-------------------------- ");
970 tipc_printf(buf, "------------------");
972 tipc_printf(buf, "\n");
976 * nametbl_list - print specified name table contents into the given buffer
979 static void nametbl_list(struct print_buf *buf, u32 depth_info,
980 u32 type, u32 lowbound, u32 upbound)
982 struct hlist_head *seq_head;
983 struct hlist_node *seq_node;
984 struct name_seq *seq;
989 all_types = (depth_info & TIPC_NTQ_ALLTYPES);
990 depth = (depth_info & ~TIPC_NTQ_ALLTYPES);
996 /* display all entries in name table to specified depth */
997 nametbl_header(buf, depth);
1000 for (i = 0; i < tipc_nametbl_size; i++) {
1001 seq_head = &table.types[i];
1002 hlist_for_each_entry(seq, seq_node, seq_head, ns_list) {
1003 nameseq_list(seq, buf, depth, seq->type,
1004 lowbound, upbound, i);
1008 /* display only the sequence that matches the specified type */
1009 if (upbound < lowbound) {
1010 tipc_printf(buf, "invalid name sequence specified\n");
1013 nametbl_header(buf, depth);
1015 seq_head = &table.types[i];
1016 hlist_for_each_entry(seq, seq_node, seq_head, ns_list) {
1017 if (seq->type == type) {
1018 nameseq_list(seq, buf, depth, type,
1019 lowbound, upbound, i);
1027 void tipc_nametbl_print(struct print_buf *buf, const char *str)
1029 tipc_printf(buf, str);
1030 read_lock_bh(&tipc_nametbl_lock);
1031 nametbl_list(buf, 0, 0, 0, 0);
1032 read_unlock_bh(&tipc_nametbl_lock);
1036 #define MAX_NAME_TBL_QUERY 32768
1038 struct sk_buff *tipc_nametbl_get(const void *req_tlv_area, int req_tlv_space)
1040 struct sk_buff *buf;
1041 struct tipc_name_table_query *argv;
1042 struct tlv_desc *rep_tlv;
1046 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NAME_TBL_QUERY))
1047 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
1049 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_NAME_TBL_QUERY));
1053 rep_tlv = (struct tlv_desc *)buf->data;
1054 tipc_printbuf_init(&b, TLV_DATA(rep_tlv), MAX_NAME_TBL_QUERY);
1055 argv = (struct tipc_name_table_query *)TLV_DATA(req_tlv_area);
1056 read_lock_bh(&tipc_nametbl_lock);
1057 nametbl_list(&b, ntohl(argv->depth), ntohl(argv->type),
1058 ntohl(argv->lowbound), ntohl(argv->upbound));
1059 read_unlock_bh(&tipc_nametbl_lock);
1060 str_len = tipc_printbuf_validate(&b);
1062 skb_put(buf, TLV_SPACE(str_len));
1063 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
1069 void tipc_nametbl_dump(void)
1071 nametbl_list(TIPC_CONS, 0, 0, 0, 0);
1075 int tipc_nametbl_init(void)
1077 table.types = kcalloc(tipc_nametbl_size, sizeof(struct hlist_head),
1082 table.local_publ_count = 0;
1086 void tipc_nametbl_stop(void)
1093 /* Verify name table is empty, then release it */
1095 write_lock_bh(&tipc_nametbl_lock);
1096 for (i = 0; i < tipc_nametbl_size; i++) {
1097 if (!hlist_empty(&table.types[i]))
1098 err("tipc_nametbl_stop(): hash chain %u is non-null\n", i);
1102 write_unlock_bh(&tipc_nametbl_lock);