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-rw-r--r--net/tipc/bearer.c18
-rw-r--r--net/tipc/bearer.h8
-rw-r--r--net/tipc/link.c150
3 files changed, 127 insertions, 49 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index aa37261..b40e98a 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -65,10 +65,10 @@ static int media_name_valid(const char *name)
}
/**
- * media_find - locates specified media object by name
+ * tipc_media_find - locates specified media object by name
*/
-static struct media *media_find(const char *name)
+struct media *tipc_media_find(const char *name)
{
u32 i;
@@ -118,7 +118,7 @@ int tipc_register_media(struct media *m_ptr)
goto exit;
if (media_count >= MAX_MEDIA)
goto exit;
- if (media_find(m_ptr->name) || media_find_id(m_ptr->type_id))
+ if (tipc_media_find(m_ptr->name) || media_find_id(m_ptr->type_id))
goto exit;
media_list[media_count] = m_ptr;
@@ -229,10 +229,10 @@ static int bearer_name_validate(const char *name,
}
/**
- * bearer_find - locates bearer object with matching bearer name
+ * tipc_bearer_find - locates bearer object with matching bearer name
*/
-static struct tipc_bearer *bearer_find(const char *name)
+struct tipc_bearer *tipc_bearer_find(const char *name)
{
struct tipc_bearer *b_ptr;
u32 i;
@@ -463,7 +463,7 @@ int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority)
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);
@@ -513,6 +513,8 @@ restart:
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->priority = priority;
@@ -546,7 +548,7 @@ int tipc_block_bearer(const char *name)
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);
@@ -600,7 +602,7 @@ int tipc_disable_bearer(const char *name)
int res;
write_lock_bh(&tipc_net_lock);
- b_ptr = bearer_find(name);
+ b_ptr = tipc_bearer_find(name);
if (b_ptr == NULL) {
warn("Attempt to disable unknown bearer <%s>\n", name);
res = -EINVAL;
diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h
index 54a5a57..cfe77c4 100644
--- a/net/tipc/bearer.h
+++ b/net/tipc/bearer.h
@@ -118,6 +118,8 @@ struct media {
* @name: bearer name (format = media:interface)
* @media: ptr to media structure associated with bearer
* @priority: default link priority for bearer
+ * @window: default window size for bearer
+ * @tolerance: default link tolerance for bearer
* @identity: array index of this bearer within TIPC bearer array
* @link_req: ptr to (optional) structure making periodic link setup requests
* @links: list of non-congested links associated with bearer
@@ -139,6 +141,8 @@ struct tipc_bearer {
spinlock_t lock;
struct media *media;
u32 priority;
+ u32 window;
+ u32 tolerance;
u32 identity;
struct link_req *link_req;
struct list_head links;
@@ -176,6 +180,8 @@ int tipc_disable_bearer(const char *name);
int tipc_eth_media_start(void);
void tipc_eth_media_stop(void);
+int tipc_media_set_priority(const char *name, u32 new_value);
+int tipc_media_set_window(const char *name, u32 new_value);
void tipc_media_addr_printf(struct print_buf *pb, struct tipc_media_addr *a);
struct sk_buff *tipc_media_get_names(void);
@@ -183,7 +189,9 @@ struct sk_buff *tipc_bearer_get_names(void);
void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest);
void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest);
void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct link *l_ptr);
+struct tipc_bearer *tipc_bearer_find(const char *name);
struct tipc_bearer *tipc_bearer_find_interface(const char *if_name);
+struct media *tipc_media_find(const char *name);
int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, struct link *l_ptr);
int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct link *l_ptr);
void tipc_bearer_stop(void);
diff --git a/net/tipc/link.c b/net/tipc/link.c
index ae98a72..332915e 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -343,7 +343,7 @@ struct link *tipc_link_create(struct tipc_node *n_ptr,
l_ptr->checkpoint = 1;
l_ptr->peer_session = INVALID_SESSION;
l_ptr->b_ptr = b_ptr;
- link_set_supervision_props(l_ptr, b_ptr->media->tolerance);
+ link_set_supervision_props(l_ptr, b_ptr->tolerance);
l_ptr->state = RESET_UNKNOWN;
l_ptr->pmsg = (struct tipc_msg *)&l_ptr->proto_msg;
@@ -355,7 +355,7 @@ struct link *tipc_link_create(struct tipc_node *n_ptr,
strcpy((char *)msg_data(msg), if_name);
l_ptr->priority = b_ptr->priority;
- tipc_link_set_queue_limits(l_ptr, b_ptr->media->window);
+ tipc_link_set_queue_limits(l_ptr, b_ptr->window);
link_init_max_pkt(l_ptr);
@@ -2754,13 +2754,113 @@ static struct link *link_find_link(const char *name, struct tipc_node **node)
return l_ptr;
}
+/**
+ * link_value_is_valid -- validate proposed link tolerance/priority/window
+ *
+ * @cmd - value type (TIPC_CMD_SET_LINK_*)
+ * @new_value - the new value
+ *
+ * Returns 1 if value is within range, 0 if not.
+ */
+
+static int link_value_is_valid(u16 cmd, u32 new_value)
+{
+ switch (cmd) {
+ case TIPC_CMD_SET_LINK_TOL:
+ return (new_value >= TIPC_MIN_LINK_TOL) &&
+ (new_value <= TIPC_MAX_LINK_TOL);
+ case TIPC_CMD_SET_LINK_PRI:
+ return (new_value <= TIPC_MAX_LINK_PRI);
+ case TIPC_CMD_SET_LINK_WINDOW:
+ return (new_value >= TIPC_MIN_LINK_WIN) &&
+ (new_value <= TIPC_MAX_LINK_WIN);
+ }
+ return 0;
+}
+
+
+/**
+ * link_cmd_set_value - change priority/tolerance/window for link/bearer/media
+ * @name - ptr to link, bearer, or media name
+ * @new_value - new value of link, bearer, or media setting
+ * @cmd - which link, bearer, or media attribute to set (TIPC_CMD_SET_LINK_*)
+ *
+ * Caller must hold 'tipc_net_lock' to ensure link/bearer/media is not deleted.
+ *
+ * Returns 0 if value updated and negative value on error.
+ */
+
+static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd)
+{
+ struct tipc_node *node;
+ struct link *l_ptr;
+ struct tipc_bearer *b_ptr;
+ struct media *m_ptr;
+
+ l_ptr = link_find_link(name, &node);
+ if (l_ptr) {
+ /*
+ * acquire node lock for tipc_link_send_proto_msg().
+ * see "TIPC locking policy" in net.c.
+ */
+ tipc_node_lock(node);
+ switch (cmd) {
+ case TIPC_CMD_SET_LINK_TOL:
+ link_set_supervision_props(l_ptr, new_value);
+ tipc_link_send_proto_msg(l_ptr,
+ STATE_MSG, 0, 0, new_value, 0, 0);
+ break;
+ case TIPC_CMD_SET_LINK_PRI:
+ l_ptr->priority = new_value;
+ tipc_link_send_proto_msg(l_ptr,
+ STATE_MSG, 0, 0, 0, new_value, 0);
+ break;
+ case TIPC_CMD_SET_LINK_WINDOW:
+ tipc_link_set_queue_limits(l_ptr, new_value);
+ break;
+ }
+ tipc_node_unlock(node);
+ return 0;
+ }
+
+ b_ptr = tipc_bearer_find(name);
+ if (b_ptr) {
+ switch (cmd) {
+ case TIPC_CMD_SET_LINK_TOL:
+ b_ptr->tolerance = new_value;
+ return 0;
+ case TIPC_CMD_SET_LINK_PRI:
+ b_ptr->priority = new_value;
+ return 0;
+ case TIPC_CMD_SET_LINK_WINDOW:
+ b_ptr->window = new_value;
+ return 0;
+ }
+ return -EINVAL;
+ }
+
+ m_ptr = tipc_media_find(name);
+ if (!m_ptr)
+ return -ENODEV;
+ switch (cmd) {
+ case TIPC_CMD_SET_LINK_TOL:
+ m_ptr->tolerance = new_value;
+ return 0;
+ case TIPC_CMD_SET_LINK_PRI:
+ m_ptr->priority = new_value;
+ return 0;
+ case TIPC_CMD_SET_LINK_WINDOW:
+ m_ptr->window = new_value;
+ return 0;
+ }
+ return -EINVAL;
+}
+
struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space,
u16 cmd)
{
struct tipc_link_config *args;
u32 new_value;
- struct link *l_ptr;
- struct tipc_node *node;
int res;
if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_CONFIG))
@@ -2769,6 +2869,10 @@ struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space
args = (struct tipc_link_config *)TLV_DATA(req_tlv_area);
new_value = ntohl(args->value);
+ if (!link_value_is_valid(cmd, new_value))
+ return tipc_cfg_reply_error_string(
+ "cannot change, value invalid");
+
if (!strcmp(args->name, tipc_bclink_name)) {
if ((cmd == TIPC_CMD_SET_LINK_WINDOW) &&
(tipc_bclink_set_queue_limits(new_value) == 0))
@@ -2778,43 +2882,7 @@ struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space
}
read_lock_bh(&tipc_net_lock);
- l_ptr = link_find_link(args->name, &node);
- if (!l_ptr) {
- read_unlock_bh(&tipc_net_lock);
- return tipc_cfg_reply_error_string("link not found");
- }
-
- tipc_node_lock(node);
- res = -EINVAL;
- switch (cmd) {
- case TIPC_CMD_SET_LINK_TOL:
- if ((new_value >= TIPC_MIN_LINK_TOL) &&
- (new_value <= TIPC_MAX_LINK_TOL)) {
- link_set_supervision_props(l_ptr, new_value);
- tipc_link_send_proto_msg(l_ptr, STATE_MSG,
- 0, 0, new_value, 0, 0);
- res = 0;
- }
- break;
- case TIPC_CMD_SET_LINK_PRI:
- if ((new_value >= TIPC_MIN_LINK_PRI) &&
- (new_value <= TIPC_MAX_LINK_PRI)) {
- l_ptr->priority = new_value;
- tipc_link_send_proto_msg(l_ptr, STATE_MSG,
- 0, 0, 0, new_value, 0);
- res = 0;
- }
- break;
- case TIPC_CMD_SET_LINK_WINDOW:
- if ((new_value >= TIPC_MIN_LINK_WIN) &&
- (new_value <= TIPC_MAX_LINK_WIN)) {
- tipc_link_set_queue_limits(l_ptr, new_value);
- res = 0;
- }
- break;
- }
- tipc_node_unlock(node);
-
+ res = link_cmd_set_value(args->name, new_value, cmd);
read_unlock_bh(&tipc_net_lock);
if (res)
return tipc_cfg_reply_error_string("cannot change link setting");
generated by cgit v0.10.2 at 2024-10-31 14:45:34 (GMT)