* publications of the associated name sequence belong to it.
* (The cluster and node lists may be empty.)
*/
-
struct name_info {
struct list_head node_list;
struct list_head cluster_list;
* @upper: name sequence upper bound
* @info: pointer to name sequence publication info
*/
-
struct sub_seq {
u32 lower;
u32 upper;
* @subscriptions: list of subscriptions for this 'type'
* @lock: spinlock controlling access to publication lists of all sub-sequences
*/
-
struct name_seq {
u32 type;
struct sub_seq *sseqs;
* accessed via hashing on 'type'; name sequence lists are *not* sorted
* @local_publ_count: number of publications issued by this node
*/
-
struct name_table {
struct hlist_head *types;
u32 local_publ_count;
/**
* publ_create - create a publication structure
*/
-
static struct publication *publ_create(u32 type, u32 lower, u32 upper,
u32 scope, u32 node, u32 port_ref,
u32 key)
/**
* tipc_subseq_alloc - allocate a specified number of sub-sequence structures
*/
-
static struct sub_seq *tipc_subseq_alloc(u32 cnt)
{
struct sub_seq *sseq = kcalloc(cnt, sizeof(struct sub_seq), GFP_ATOMIC);
*
* Allocates a single sub-sequence structure and sets it to all 0's.
*/
-
static struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head)
{
struct name_seq *nseq = kzalloc(sizeof(*nseq), GFP_ATOMIC);
return nseq;
}
-/**
+/*
+ * nameseq_delete_empty - deletes a name sequence structure if now unused
+ */
+static void nameseq_delete_empty(struct name_seq *seq)
+{
+ if (!seq->first_free && list_empty(&seq->subscriptions)) {
+ hlist_del_init(&seq->ns_list);
+ kfree(seq->sseqs);
+ kfree(seq);
+ }
+}
+
+/*
* nameseq_find_subseq - find sub-sequence (if any) matching a name instance
*
* Very time-critical, so binary searches through sub-sequence array.
*/
-
static struct sub_seq *nameseq_find_subseq(struct name_seq *nseq,
u32 instance)
{
*
* Note: Similar to binary search code for locating a sub-sequence.
*/
-
static u32 nameseq_locate_subseq(struct name_seq *nseq, u32 instance)
{
struct sub_seq *sseqs = nseq->sseqs;
}
/**
- * tipc_nameseq_insert_publ -
+ * tipc_nameseq_insert_publ
*/
-
static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
u32 type, u32 lower, u32 upper,
u32 scope, u32 node, u32 port, u32 key)
if (sseq) {
/* Lower end overlaps existing entry => need an exact match */
-
if ((sseq->lower != lower) || (sseq->upper != upper)) {
warn("Cannot publish {%u,%u,%u}, overlap error\n",
type, lower, upper);
struct sub_seq *freesseq;
/* Find where lower end should be inserted */
-
inspos = nameseq_locate_subseq(nseq, lower);
/* Fail if upper end overlaps into an existing entry */
-
if ((inspos < nseq->first_free) &&
(upper >= nseq->sseqs[inspos].lower)) {
warn("Cannot publish {%u,%u,%u}, overlap error\n",
}
/* Ensure there is space for new sub-sequence */
-
if (nseq->first_free == nseq->alloc) {
struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2);
INIT_LIST_HEAD(&info->zone_list);
/* Insert new sub-sequence */
-
sseq = &nseq->sseqs[inspos];
freesseq = &nseq->sseqs[nseq->first_free];
memmove(sseq + 1, sseq, (freesseq - sseq) * sizeof(*sseq));
created_subseq = 1;
}
- /* Insert a publication: */
-
+ /* Insert a publication */
publ = publ_create(type, lower, upper, scope, node, port, key);
if (!publ)
return NULL;
list_add(&publ->zone_list, &info->zone_list);
info->zone_list_size++;
- if (in_own_cluster_exact(node)) {
+ if (in_own_cluster(node)) {
list_add(&publ->cluster_list, &info->cluster_list);
info->cluster_list_size++;
}
- if (node == tipc_own_addr) {
+ if (in_own_node(node)) {
list_add(&publ->node_list, &info->node_list);
info->node_list_size++;
}
- /*
- * Any subscriptions waiting for notification?
- */
+ /* Any subscriptions waiting for notification? */
list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
tipc_subscr_report_overlap(s,
publ->lower,
}
/**
- * tipc_nameseq_remove_publ -
+ * tipc_nameseq_remove_publ
*
* NOTE: There may be cases where TIPC is asked to remove a publication
* that is not in the name table. For example, if another node issues a
* A failed withdraw request simply returns a failure indication and lets the
* caller issue any error or warning messages associated with such a problem.
*/
-
static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
u32 node, u32 ref, u32 key)
{
info = sseq->info;
/* Locate publication, if it exists */
-
list_for_each_entry(publ, &info->zone_list, zone_list) {
if ((publ->key == key) && (publ->ref == ref) &&
(!publ->node || (publ->node == node)))
found:
/* Remove publication from zone scope list */
-
list_del(&publ->zone_list);
info->zone_list_size--;
/* Remove publication from cluster scope list, if present */
-
- if (in_own_cluster_exact(node)) {
+ if (in_own_cluster(node)) {
list_del(&publ->cluster_list);
info->cluster_list_size--;
}
/* Remove publication from node scope list, if present */
-
- if (node == tipc_own_addr) {
+ if (in_own_node(node)) {
list_del(&publ->node_list);
info->node_list_size--;
}
/* Contract subseq list if no more publications for that subseq */
-
if (list_empty(&info->zone_list)) {
kfree(info);
free = &nseq->sseqs[nseq->first_free--];
}
/* Notify any waiting subscriptions */
-
list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
tipc_subscr_report_overlap(s,
publ->lower,
* the prescribed number of events if there is any sub-
* sequence overlapping with the requested sequence
*/
-
static void tipc_nameseq_subscribe(struct name_seq *nseq,
struct tipc_subscription *s)
{
{
struct name_seq *seq = nametbl_find_seq(type);
- if (lower > upper) {
- warn("Failed to publish illegal {%u,%u,%u}\n",
- type, lower, upper);
+ if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE) ||
+ (lower > upper)) {
+ dbg("Failed to publish illegal {%u,%u,%u} with scope %u\n",
+ type, lower, upper, scope);
return NULL;
}
return NULL;
publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
-
- if (!seq->first_free && list_empty(&seq->subscriptions)) {
- hlist_del_init(&seq->ns_list);
- kfree(seq->sseqs);
- kfree(seq);
- }
+ nameseq_delete_empty(seq);
return publ;
}
* - if name translation is attempted and fails, sets 'destnode' to 0
* and returns 0
*/
-
u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
{
struct sub_seq *sseq;
spin_lock_bh(&seq->lock);
info = sseq->info;
- /* Closest-First Algorithm: */
+ /* Closest-First Algorithm */
if (likely(!*destnode)) {
if (!list_empty(&info->node_list)) {
publ = list_first_entry(&info->node_list,
}
}
- /* Round-Robin Algorithm: */
+ /* Round-Robin Algorithm */
else if (*destnode == tipc_own_addr) {
if (list_empty(&info->node_list))
goto no_match;
*
* Returns non-zero if any off-node ports overlap
*/
-
int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,
struct tipc_port_list *dports)
{
/*
* tipc_nametbl_publish - add name publication to network name tables
*/
-
struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
u32 scope, u32 port_ref, u32 key)
{
/**
* tipc_nametbl_withdraw - withdraw name publication from network name tables
*/
-
int tipc_nametbl_withdraw(u32 type, u32 lower, u32 ref, u32 key)
{
struct publication *publ;
/**
* tipc_nametbl_subscribe - add a subscription object to the name table
*/
-
void tipc_nametbl_subscribe(struct tipc_subscription *s)
{
u32 type = s->seq.type;
/**
* tipc_nametbl_unsubscribe - remove a subscription object from name table
*/
-
void tipc_nametbl_unsubscribe(struct tipc_subscription *s)
{
struct name_seq *seq;
spin_lock_bh(&seq->lock);
list_del_init(&s->nameseq_list);
spin_unlock_bh(&seq->lock);
- if ((seq->first_free == 0) && list_empty(&seq->subscriptions)) {
- hlist_del_init(&seq->ns_list);
- kfree(seq->sseqs);
- kfree(seq);
- }
+ nameseq_delete_empty(seq);
}
write_unlock_bh(&tipc_nametbl_lock);
}
/**
* subseq_list: print specified sub-sequence contents into the given buffer
*/
-
static void subseq_list(struct sub_seq *sseq, struct print_buf *buf, u32 depth,
u32 index)
{
/**
* nameseq_list: print specified name sequence contents into the given buffer
*/
-
static void nameseq_list(struct name_seq *seq, struct print_buf *buf, u32 depth,
u32 type, u32 lowbound, u32 upbound, u32 index)
{
/**
* nametbl_header - print name table header into the given buffer
*/
-
static void nametbl_header(struct print_buf *buf, u32 depth)
{
const char *header[] = {
/**
* nametbl_list - print specified name table contents into the given buffer
*/
-
static void nametbl_list(struct print_buf *buf, u32 depth_info,
u32 type, u32 lowbound, u32 upbound)
{
return;
/* Verify name table is empty, then release it */
-
write_lock_bh(&tipc_nametbl_lock);
for (i = 0; i < tipc_nametbl_size; i++) {
if (!hlist_empty(&table.types[i]))
table.types = NULL;
write_unlock_bh(&tipc_nametbl_lock);
}
-
projects / firefly-linux-kernel-4.4.55.git / blobdiff