* net/tipc/bearer.c: TIPC bearer code
*
* Copyright (c) 1996-2006, Ericsson AB
- * Copyright (c) 2004-2006, Wind River Systems
+ * Copyright (c) 2004-2006, 2010-2011, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include "core.h"
#include "config.h"
-#include "dbg.h"
#include "bearer.h"
-#include "link.h"
-#include "port.h"
#include "discover.h"
-#include "bcast.h"
#define MAX_ADDR_STR 32
-static struct media *media_list = NULL;
-static u32 media_count = 0;
+static struct tipc_media *media_list[MAX_MEDIA];
+static u32 media_count;
-struct bearer *tipc_bearers = NULL;
+struct tipc_bearer tipc_bearers[MAX_BEARERS];
+
+static void bearer_disable(struct tipc_bearer *b_ptr);
/**
* media_name_valid - validate media name
len = strlen(name);
if ((len + 1) > TIPC_MAX_MEDIA_NAME)
return 0;
- return (strspn(name, tipc_alphabet) == len);
+ return strspn(name, tipc_alphabet) == len;
+}
+
+/**
+ * tipc_media_find - locates specified media object by name
+ */
+
+struct tipc_media *tipc_media_find(const char *name)
+{
+ u32 i;
+
+ for (i = 0; i < media_count; i++) {
+ if (!strcmp(media_list[i]->name, name))
+ return media_list[i];
+ }
+ return NULL;
}
/**
- * media_find - locates specified media object by name
+ * media_find_id - locates specified media object by type identifier
*/
-static struct media *media_find(const char *name)
+static struct tipc_media *media_find_id(u8 type)
{
- struct media *m_ptr;
u32 i;
- for (i = 0, m_ptr = media_list; i < media_count; i++, m_ptr++) {
- if (!strcmp(m_ptr->name, name))
- return m_ptr;
+ for (i = 0; i < media_count; i++) {
+ if (media_list[i]->type_id == type)
+ return media_list[i];
}
return NULL;
}
* Bearers for this media type must be activated separately at a later stage.
*/
-int tipc_register_media(u32 media_type,
- char *name,
- int (*enable)(struct tipc_bearer *),
- void (*disable)(struct tipc_bearer *),
- int (*send_msg)(struct sk_buff *,
- struct tipc_bearer *,
- struct tipc_media_addr *),
- char *(*addr2str)(struct tipc_media_addr *a,
- char *str_buf, int str_size),
- struct tipc_media_addr *bcast_addr,
- const u32 bearer_priority,
- const u32 link_tolerance, /* [ms] */
- const u32 send_window_limit)
+int tipc_register_media(struct tipc_media *m_ptr)
{
- struct media *m_ptr;
- u32 media_id;
- u32 i;
int res = -EINVAL;
write_lock_bh(&tipc_net_lock);
- if (!media_list)
- goto exit;
- if (!media_name_valid(name)) {
- warn("Media <%s> rejected, illegal name\n", name);
+ if (!media_name_valid(m_ptr->name))
goto exit;
- }
- if (!bcast_addr) {
- warn("Media <%s> rejected, no broadcast address\n", name);
+ if ((m_ptr->bcast_addr.media_id != m_ptr->type_id) ||
+ !m_ptr->bcast_addr.broadcast)
goto exit;
- }
- if ((bearer_priority < TIPC_MIN_LINK_PRI) &&
- (bearer_priority > TIPC_MAX_LINK_PRI)) {
- warn("Media <%s> rejected, illegal priority (%u)\n", name,
- bearer_priority);
+ if (m_ptr->priority > TIPC_MAX_LINK_PRI)
goto exit;
- }
- if ((link_tolerance < TIPC_MIN_LINK_TOL) ||
- (link_tolerance > TIPC_MAX_LINK_TOL)) {
- warn("Media <%s> rejected, illegal tolerance (%u)\n", name,
- link_tolerance);
+ if ((m_ptr->tolerance < TIPC_MIN_LINK_TOL) ||
+ (m_ptr->tolerance > TIPC_MAX_LINK_TOL))
goto exit;
- }
-
- media_id = media_count++;
- if (media_id >= MAX_MEDIA) {
- warn("Media <%s> rejected, media limit reached (%u)\n", name,
- MAX_MEDIA);
- media_count--;
+ if (media_count >= MAX_MEDIA)
+ goto exit;
+ if (tipc_media_find(m_ptr->name) || media_find_id(m_ptr->type_id))
goto exit;
- }
- for (i = 0; i < media_id; i++) {
- if (media_list[i].type_id == media_type) {
- warn("Media <%s> rejected, duplicate type (%u)\n", name,
- media_type);
- media_count--;
- goto exit;
- }
- if (!strcmp(name, media_list[i].name)) {
- warn("Media <%s> rejected, duplicate name\n", name);
- media_count--;
- goto exit;
- }
- }
- m_ptr = &media_list[media_id];
- m_ptr->type_id = media_type;
- m_ptr->send_msg = send_msg;
- m_ptr->enable_bearer = enable;
- m_ptr->disable_bearer = disable;
- m_ptr->addr2str = addr2str;
- memcpy(&m_ptr->bcast_addr, bcast_addr, sizeof(*bcast_addr));
- m_ptr->bcast = 1;
- strcpy(m_ptr->name, name);
- m_ptr->priority = bearer_priority;
- m_ptr->tolerance = link_tolerance;
- m_ptr->window = send_window_limit;
- dbg("Media <%s> registered\n", name);
+ media_list[media_count] = m_ptr;
+ media_count++;
res = 0;
exit:
write_unlock_bh(&tipc_net_lock);
+ if (res)
+ warn("Media <%s> registration error\n", m_ptr->name);
return res;
}
void tipc_media_addr_printf(struct print_buf *pb, struct tipc_media_addr *a)
{
- struct media *m_ptr;
- u32 media_type;
- u32 i;
+ char addr_str[MAX_ADDR_STR];
+ struct tipc_media *m_ptr;
- media_type = ntohl(a->type);
- for (i = 0, m_ptr = media_list; i < media_count; i++, m_ptr++) {
- if (m_ptr->type_id == media_type)
- break;
- }
+ m_ptr = media_find_id(a->media_id);
- if ((i < media_count) && (m_ptr->addr2str != NULL)) {
- char addr_str[MAX_ADDR_STR];
+ if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
+ tipc_printf(pb, "%s(%s)", m_ptr->name, addr_str);
+ else {
+ u32 i;
- tipc_printf(pb, "%s(%s)", m_ptr->name,
- m_ptr->addr2str(a, addr_str, sizeof(addr_str)));
- } else {
- unchar *addr = (unchar *)&a->dev_addr;
-
- tipc_printf(pb, "UNKNOWN(%u)", media_type);
- for (i = 0; i < (sizeof(*a) - sizeof(a->type)); i++) {
- tipc_printf(pb, "-%02x", addr[i]);
- }
+ tipc_printf(pb, "UNKNOWN(%u)", a->media_id);
+ for (i = 0; i < sizeof(a->value); i++)
+ tipc_printf(pb, "-%02x", a->value[i]);
}
}
struct sk_buff *tipc_media_get_names(void)
{
struct sk_buff *buf;
- struct media *m_ptr;
int i;
buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
return NULL;
read_lock_bh(&tipc_net_lock);
- for (i = 0, m_ptr = media_list; i < media_count; i++, m_ptr++) {
- tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME, m_ptr->name,
- strlen(m_ptr->name) + 1);
+ for (i = 0; i < media_count; i++) {
+ tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
+ media_list[i]->name,
+ strlen(media_list[i]->name) + 1);
}
read_unlock_bh(&tipc_net_lock);
return buf;
/* ensure all component parts of bearer name are present */
media_name = name_copy;
- if ((if_name = strchr(media_name, ':')) == NULL)
+ if_name = strchr(media_name, ':');
+ if (if_name == NULL)
return 0;
*(if_name++) = 0;
media_len = if_name - media_name;
}
/**
- * bearer_find - locates bearer object with matching bearer name
+ * tipc_bearer_find - locates bearer object with matching bearer name
*/
-static struct bearer *bearer_find(const char *name)
+struct tipc_bearer *tipc_bearer_find(const char *name)
{
- struct bearer *b_ptr;
+ struct tipc_bearer *b_ptr;
u32 i;
- if (tipc_mode != TIPC_NET_MODE)
- return NULL;
-
for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) {
- if (b_ptr->active && (!strcmp(b_ptr->publ.name, name)))
+ if (b_ptr->active && (!strcmp(b_ptr->name, name)))
return b_ptr;
}
return NULL;
* tipc_bearer_find_interface - locates bearer object with matching interface name
*/
-struct bearer *tipc_bearer_find_interface(const char *if_name)
+struct tipc_bearer *tipc_bearer_find_interface(const char *if_name)
{
- struct bearer *b_ptr;
+ struct tipc_bearer *b_ptr;
char *b_if_name;
u32 i;
for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) {
if (!b_ptr->active)
continue;
- b_if_name = strchr(b_ptr->publ.name, ':') + 1;
+ b_if_name = strchr(b_ptr->name, ':') + 1;
if (!strcmp(b_if_name, if_name))
return b_ptr;
}
struct sk_buff *tipc_bearer_get_names(void)
{
struct sk_buff *buf;
- struct media *m_ptr;
- struct bearer *b_ptr;
+ struct tipc_bearer *b_ptr;
int i, j;
buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
return NULL;
read_lock_bh(&tipc_net_lock);
- for (i = 0, m_ptr = media_list; i < media_count; i++, m_ptr++) {
+ for (i = 0; i < media_count; i++) {
for (j = 0; j < MAX_BEARERS; j++) {
b_ptr = &tipc_bearers[j];
- if (b_ptr->active && (b_ptr->media == m_ptr)) {
+ if (b_ptr->active && (b_ptr->media == media_list[i])) {
tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
- b_ptr->publ.name,
- strlen(b_ptr->publ.name) + 1);
+ b_ptr->name,
+ strlen(b_ptr->name) + 1);
}
}
}
return buf;
}
-void tipc_bearer_add_dest(struct bearer *b_ptr, u32 dest)
+void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest)
{
tipc_nmap_add(&b_ptr->nodes, dest);
- tipc_disc_update_link_req(b_ptr->link_req);
tipc_bcbearer_sort();
+ tipc_disc_add_dest(b_ptr->link_req);
}
-void tipc_bearer_remove_dest(struct bearer *b_ptr, u32 dest)
+void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest)
{
tipc_nmap_remove(&b_ptr->nodes, dest);
- tipc_disc_update_link_req(b_ptr->link_req);
tipc_bcbearer_sort();
+ tipc_disc_remove_dest(b_ptr->link_req);
}
/*
* bearer.lock must be taken before calling
* Returns binary true(1) ore false(0)
*/
-static int bearer_push(struct bearer *b_ptr)
+static int bearer_push(struct tipc_bearer *b_ptr)
{
u32 res = 0;
struct link *ln, *tln;
- if (b_ptr->publ.blocked)
+ if (b_ptr->blocked)
return 0;
while (!list_empty(&b_ptr->cong_links) && (res != PUSH_FAILED)) {
return list_empty(&b_ptr->cong_links);
}
-void tipc_bearer_lock_push(struct bearer *b_ptr)
+void tipc_bearer_lock_push(struct tipc_bearer *b_ptr)
{
- int res;
-
- spin_lock_bh(&b_ptr->publ.lock);
- res = bearer_push(b_ptr);
- spin_unlock_bh(&b_ptr->publ.lock);
- if (res)
- tipc_bcbearer_push();
+ spin_lock_bh(&b_ptr->lock);
+ bearer_push(b_ptr);
+ spin_unlock_bh(&b_ptr->lock);
}
* Interrupt enabling new requests after bearer congestion or blocking:
* See bearer_send().
*/
-void tipc_continue(struct tipc_bearer *tb_ptr)
+void tipc_continue(struct tipc_bearer *b_ptr)
{
- struct bearer *b_ptr = (struct bearer *)tb_ptr;
-
- spin_lock_bh(&b_ptr->publ.lock);
- b_ptr->continue_count++;
+ spin_lock_bh(&b_ptr->lock);
if (!list_empty(&b_ptr->cong_links))
tipc_k_signal((Handler)tipc_bearer_lock_push, (unsigned long)b_ptr);
- b_ptr->publ.blocked = 0;
- spin_unlock_bh(&b_ptr->publ.lock);
+ b_ptr->blocked = 0;
+ spin_unlock_bh(&b_ptr->lock);
}
/*
* bearer.lock is busy
*/
-static void tipc_bearer_schedule_unlocked(struct bearer *b_ptr, struct link *l_ptr)
+static void tipc_bearer_schedule_unlocked(struct tipc_bearer *b_ptr, struct link *l_ptr)
{
list_move_tail(&l_ptr->link_list, &b_ptr->cong_links);
}
* bearer.lock is free
*/
-void tipc_bearer_schedule(struct bearer *b_ptr, struct link *l_ptr)
+void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct link *l_ptr)
{
- spin_lock_bh(&b_ptr->publ.lock);
+ spin_lock_bh(&b_ptr->lock);
tipc_bearer_schedule_unlocked(b_ptr, l_ptr);
- spin_unlock_bh(&b_ptr->publ.lock);
+ spin_unlock_bh(&b_ptr->lock);
}
* and if there is, try to resolve it before returning.
* 'tipc_net_lock' is read_locked when this function is called
*/
-int tipc_bearer_resolve_congestion(struct bearer *b_ptr, struct link *l_ptr)
+int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, struct link *l_ptr)
{
int res = 1;
if (list_empty(&b_ptr->cong_links))
return 1;
- spin_lock_bh(&b_ptr->publ.lock);
+ spin_lock_bh(&b_ptr->lock);
if (!bearer_push(b_ptr)) {
tipc_bearer_schedule_unlocked(b_ptr, l_ptr);
res = 0;
}
- spin_unlock_bh(&b_ptr->publ.lock);
+ spin_unlock_bh(&b_ptr->lock);
return res;
}
+/**
+ * tipc_bearer_congested - determines if bearer is currently congested
+ */
+
+int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct link *l_ptr)
+{
+ if (unlikely(b_ptr->blocked))
+ return 1;
+ if (likely(list_empty(&b_ptr->cong_links)))
+ return 0;
+ return !tipc_bearer_resolve_congestion(b_ptr, l_ptr);
+}
/**
* tipc_enable_bearer - enable bearer with the given name
*/
-int tipc_enable_bearer(const char *name, u32 bcast_scope, u32 priority)
+int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority)
{
- struct bearer *b_ptr;
- struct media *m_ptr;
+ struct tipc_bearer *b_ptr;
+ struct tipc_media *m_ptr;
struct bearer_name b_name;
char addr_string[16];
u32 bearer_id;
warn("Bearer <%s> rejected, illegal name\n", name);
return -EINVAL;
}
- if (!tipc_addr_domain_valid(bcast_scope) ||
- !in_scope(bcast_scope, tipc_own_addr)) {
- warn("Bearer <%s> rejected, illegal broadcast scope\n", name);
+ if (tipc_addr_domain_valid(disc_domain) &&
+ (disc_domain != tipc_own_addr)) {
+ if (tipc_in_scope(disc_domain, tipc_own_addr)) {
+ disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
+ res = 0; /* accept any node in own cluster */
+ } else if (in_own_cluster(disc_domain))
+ res = 0; /* accept specified node in own cluster */
+ }
+ if (res) {
+ warn("Bearer <%s> rejected, illegal discovery domain\n", name);
return -EINVAL;
}
if ((priority < TIPC_MIN_LINK_PRI ||
write_lock_bh(&tipc_net_lock);
- m_ptr = media_find(b_name.media_name);
+ m_ptr = tipc_media_find(b_name.media_name);
if (!m_ptr) {
warn("Bearer <%s> rejected, media <%s> not registered\n", name,
b_name.media_name);
- goto failed;
+ goto exit;
}
if (priority == TIPC_MEDIA_LINK_PRI)
bearer_id = i;
continue;
}
- if (!strcmp(name, tipc_bearers[i].publ.name)) {
+ if (!strcmp(name, tipc_bearers[i].name)) {
warn("Bearer <%s> rejected, already enabled\n", name);
- goto failed;
+ goto exit;
}
if ((tipc_bearers[i].priority == priority) &&
(++with_this_prio > 2)) {
if (priority-- == 0) {
warn("Bearer <%s> rejected, duplicate priority\n",
name);
- goto failed;
+ goto exit;
}
warn("Bearer <%s> priority adjustment required %u->%u\n",
name, priority + 1, priority);
if (bearer_id >= MAX_BEARERS) {
warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
name, MAX_BEARERS);
- goto failed;
+ goto exit;
}
b_ptr = &tipc_bearers[bearer_id];
- memset(b_ptr, 0, sizeof(struct bearer));
-
- strcpy(b_ptr->publ.name, name);
- res = m_ptr->enable_bearer(&b_ptr->publ);
+ strcpy(b_ptr->name, name);
+ res = m_ptr->enable_bearer(b_ptr);
if (res) {
warn("Bearer <%s> rejected, enable failure (%d)\n", name, -res);
- goto failed;
+ goto exit;
}
b_ptr->identity = bearer_id;
b_ptr->media = m_ptr;
+ b_ptr->tolerance = m_ptr->tolerance;
+ b_ptr->window = m_ptr->window;
b_ptr->net_plane = bearer_id + 'A';
b_ptr->active = 1;
- b_ptr->detect_scope = bcast_scope;
b_ptr->priority = priority;
INIT_LIST_HEAD(&b_ptr->cong_links);
INIT_LIST_HEAD(&b_ptr->links);
- if (m_ptr->bcast) {
- b_ptr->link_req = tipc_disc_init_link_req(b_ptr, &m_ptr->bcast_addr,
- bcast_scope, 2);
+ spin_lock_init(&b_ptr->lock);
+
+ res = tipc_disc_create(b_ptr, &m_ptr->bcast_addr, disc_domain);
+ if (res) {
+ bearer_disable(b_ptr);
+ warn("Bearer <%s> rejected, discovery object creation failed\n",
+ name);
+ goto exit;
}
- spin_lock_init(&b_ptr->publ.lock);
- write_unlock_bh(&tipc_net_lock);
info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
- name, addr_string_fill(addr_string, bcast_scope), priority);
- return 0;
-failed:
+ name, tipc_addr_string_fill(addr_string, disc_domain), priority);
+exit:
write_unlock_bh(&tipc_net_lock);
return res;
}
int tipc_block_bearer(const char *name)
{
- struct bearer *b_ptr = NULL;
+ struct tipc_bearer *b_ptr = NULL;
struct link *l_ptr;
struct link *temp_l_ptr;
read_lock_bh(&tipc_net_lock);
- b_ptr = bearer_find(name);
+ b_ptr = tipc_bearer_find(name);
if (!b_ptr) {
warn("Attempt to block unknown bearer <%s>\n", name);
read_unlock_bh(&tipc_net_lock);
}
info("Blocking bearer <%s>\n", name);
- spin_lock_bh(&b_ptr->publ.lock);
- b_ptr->publ.blocked = 1;
+ spin_lock_bh(&b_ptr->lock);
+ b_ptr->blocked = 1;
+ list_splice_init(&b_ptr->cong_links, &b_ptr->links);
list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
struct tipc_node *n_ptr = l_ptr->owner;
tipc_link_reset(l_ptr);
spin_unlock_bh(&n_ptr->lock);
}
- spin_unlock_bh(&b_ptr->publ.lock);
+ spin_unlock_bh(&b_ptr->lock);
read_unlock_bh(&tipc_net_lock);
return 0;
}
* Note: This routine assumes caller holds tipc_net_lock.
*/
-static int bearer_disable(const char *name)
+static void bearer_disable(struct tipc_bearer *b_ptr)
{
- struct bearer *b_ptr;
struct link *l_ptr;
struct link *temp_l_ptr;
- b_ptr = bearer_find(name);
- if (!b_ptr) {
- warn("Attempt to disable unknown bearer <%s>\n", name);
- return -EINVAL;
- }
-
- info("Disabling bearer <%s>\n", name);
- tipc_disc_stop_link_req(b_ptr->link_req);
- spin_lock_bh(&b_ptr->publ.lock);
- b_ptr->link_req = NULL;
- b_ptr->publ.blocked = 1;
- if (b_ptr->media->disable_bearer) {
- spin_unlock_bh(&b_ptr->publ.lock);
- write_unlock_bh(&tipc_net_lock);
- b_ptr->media->disable_bearer(&b_ptr->publ);
- write_lock_bh(&tipc_net_lock);
- spin_lock_bh(&b_ptr->publ.lock);
- }
+ info("Disabling bearer <%s>\n", b_ptr->name);
+ spin_lock_bh(&b_ptr->lock);
+ b_ptr->blocked = 1;
+ b_ptr->media->disable_bearer(b_ptr);
+ list_splice_init(&b_ptr->cong_links, &b_ptr->links);
list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
tipc_link_delete(l_ptr);
}
- spin_unlock_bh(&b_ptr->publ.lock);
- memset(b_ptr, 0, sizeof(struct bearer));
- return 0;
+ if (b_ptr->link_req)
+ tipc_disc_delete(b_ptr->link_req);
+ spin_unlock_bh(&b_ptr->lock);
+ memset(b_ptr, 0, sizeof(struct tipc_bearer));
}
int tipc_disable_bearer(const char *name)
{
+ struct tipc_bearer *b_ptr;
int res;
write_lock_bh(&tipc_net_lock);
- res = bearer_disable(name);
- write_unlock_bh(&tipc_net_lock);
- return res;
-}
-
-
-
-int tipc_bearer_init(void)
-{
- int res;
-
- write_lock_bh(&tipc_net_lock);
- tipc_bearers = kcalloc(MAX_BEARERS, sizeof(struct bearer), GFP_ATOMIC);
- media_list = kcalloc(MAX_MEDIA, sizeof(struct media), GFP_ATOMIC);
- if (tipc_bearers && media_list) {
- res = 0;
+ b_ptr = tipc_bearer_find(name);
+ if (b_ptr == NULL) {
+ warn("Attempt to disable unknown bearer <%s>\n", name);
+ res = -EINVAL;
} else {
- kfree(tipc_bearers);
- kfree(media_list);
- tipc_bearers = NULL;
- media_list = NULL;
- res = -ENOMEM;
+ bearer_disable(b_ptr);
+ res = 0;
}
write_unlock_bh(&tipc_net_lock);
return res;
}
+
+
void tipc_bearer_stop(void)
{
u32 i;
- if (!tipc_bearers)
- return;
-
for (i = 0; i < MAX_BEARERS; i++) {
if (tipc_bearers[i].active)
- tipc_bearers[i].publ.blocked = 1;
+ bearer_disable(&tipc_bearers[i]);
}
- for (i = 0; i < MAX_BEARERS; i++) {
- if (tipc_bearers[i].active)
- bearer_disable(tipc_bearers[i].publ.name);
- }
- kfree(tipc_bearers);
- kfree(media_list);
- tipc_bearers = NULL;
- media_list = NULL;
media_count = 0;
}
-
-
Code Review / linux-2.6.git / blobdiff