From: Paul Gortmaker <paul.gortmaker@windriver.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, Allan.Stephens@windriver.com,
Paul Gortmaker <paul.gortmaker@windriver.com>
Subject: [PATCH net-next 18/26] tipc: Optimizations to link creation code
Date: Sun, 13 Mar 2011 17:34:06 -0400 [thread overview]
Message-ID: <1300052054-7531-19-git-send-email-paul.gortmaker@windriver.com> (raw)
In-Reply-To: <1300052054-7531-1-git-send-email-paul.gortmaker@windriver.com>
From: Allan Stephens <Allan.Stephens@windriver.com>
Enhances link creation code as follows:
1) Detects illegal attempts to add a requested link earlier in the
link creation process. This prevents TIPC from wasting time
initializing a link object it then throws away, and also eliminates
the code needed to do the throwing away.
2) Passes in the node object associated with the requested link.
This allows TIPC to eliminate a search to locate the node object,
as well as code that attempted to create the node if it doesn't
exist.
Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
net/tipc/discover.c | 2 +-
net/tipc/link.c | 27 ++++++++++++++++++++-------
net/tipc/link.h | 3 ++-
net/tipc/node.c | 30 ++++--------------------------
net/tipc/node.h | 2 +-
5 files changed, 28 insertions(+), 36 deletions(-)
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 580b50a..caac5c9 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -169,7 +169,7 @@ void tipc_disc_recv_msg(struct sk_buff *buf, struct tipc_bearer *b_ptr)
/* Create a link endpoint for this bearer, if necessary */
if (!link) {
- link = tipc_link_create(b_ptr, orig, &media_addr);
+ link = tipc_link_create(n_ptr, b_ptr, &media_addr);
if (!link) {
tipc_node_unlock(n_ptr);
return;
diff --git a/net/tipc/link.c b/net/tipc/link.c
index e5f96d5..b73adeb 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -293,19 +293,35 @@ static void link_set_timer(struct link *l_ptr, u32 time)
/**
* tipc_link_create - create a new link
+ * @n_ptr: pointer to associated node
* @b_ptr: pointer to associated bearer
- * @peer: network address of node at other end of link
* @media_addr: media address to use when sending messages over link
*
* Returns pointer to link.
*/
-struct link *tipc_link_create(struct tipc_bearer *b_ptr, const u32 peer,
+struct link *tipc_link_create(struct tipc_node *n_ptr,
+ struct tipc_bearer *b_ptr,
const struct tipc_media_addr *media_addr)
{
struct link *l_ptr;
struct tipc_msg *msg;
char *if_name;
+ char addr_string[16];
+ u32 peer = n_ptr->addr;
+
+ if (n_ptr->link_cnt >= 2) {
+ tipc_addr_string_fill(addr_string, n_ptr->addr);
+ err("Attempt to establish third link to %s\n", addr_string);
+ return NULL;
+ }
+
+ if (n_ptr->links[b_ptr->identity]) {
+ tipc_addr_string_fill(addr_string, n_ptr->addr);
+ err("Attempt to establish second link on <%s> to %s\n",
+ b_ptr->name, addr_string);
+ return NULL;
+ }
l_ptr = kzalloc(sizeof(*l_ptr), GFP_ATOMIC);
if (!l_ptr) {
@@ -322,6 +338,7 @@ struct link *tipc_link_create(struct tipc_bearer *b_ptr, const u32 peer,
tipc_zone(peer), tipc_cluster(peer), tipc_node(peer));
/* note: peer i/f is appended to link name by reset/activate */
memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr));
+ l_ptr->owner = n_ptr;
l_ptr->checkpoint = 1;
l_ptr->b_ptr = b_ptr;
link_set_supervision_props(l_ptr, b_ptr->media->tolerance);
@@ -345,11 +362,7 @@ struct link *tipc_link_create(struct tipc_bearer *b_ptr, const u32 peer,
link_reset_statistics(l_ptr);
- l_ptr->owner = tipc_node_attach_link(l_ptr);
- if (!l_ptr->owner) {
- kfree(l_ptr);
- return NULL;
- }
+ tipc_node_attach_link(n_ptr, l_ptr);
k_init_timer(&l_ptr->timer, (Handler)link_timeout, (unsigned long)l_ptr);
list_add_tail(&l_ptr->link_list, &b_ptr->links);
diff --git a/net/tipc/link.h b/net/tipc/link.h
index a7794e7..e6a30db 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -207,7 +207,8 @@ struct link {
struct tipc_port;
-struct link *tipc_link_create(struct tipc_bearer *b_ptr, const u32 peer,
+struct link *tipc_link_create(struct tipc_node *n_ptr,
+ struct tipc_bearer *b_ptr,
const struct tipc_media_addr *media_addr);
void tipc_link_delete(struct link *l_ptr);
void tipc_link_changeover(struct link *l_ptr);
diff --git a/net/tipc/node.c b/net/tipc/node.c
index ca09b33..2d106ef 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -238,33 +238,11 @@ int tipc_node_is_up(struct tipc_node *n_ptr)
return tipc_node_active_links(n_ptr);
}
-struct tipc_node *tipc_node_attach_link(struct link *l_ptr)
+void tipc_node_attach_link(struct tipc_node *n_ptr, struct link *l_ptr)
{
- struct tipc_node *n_ptr = tipc_node_find(l_ptr->addr);
-
- if (!n_ptr)
- n_ptr = tipc_node_create(l_ptr->addr);
- if (n_ptr) {
- u32 bearer_id = l_ptr->b_ptr->identity;
- char addr_string[16];
-
- if (n_ptr->link_cnt >= 2) {
- err("Attempt to create third link to %s\n",
- tipc_addr_string_fill(addr_string, n_ptr->addr));
- return NULL;
- }
-
- if (!n_ptr->links[bearer_id]) {
- n_ptr->links[bearer_id] = l_ptr;
- atomic_inc(&tipc_num_links);
- n_ptr->link_cnt++;
- return n_ptr;
- }
- err("Attempt to establish second link on <%s> to %s\n",
- l_ptr->b_ptr->name,
- tipc_addr_string_fill(addr_string, l_ptr->addr));
- }
- return NULL;
+ n_ptr->links[l_ptr->b_ptr->identity] = l_ptr;
+ atomic_inc(&tipc_num_links);
+ n_ptr->link_cnt++;
}
void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr)
diff --git a/net/tipc/node.h b/net/tipc/node.h
index dde3165..5c61afc 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -111,7 +111,7 @@ extern u32 tipc_own_tag;
struct tipc_node *tipc_node_find(u32 addr);
struct tipc_node *tipc_node_create(u32 addr);
void tipc_node_delete(struct tipc_node *n_ptr);
-struct tipc_node *tipc_node_attach_link(struct link *l_ptr);
+void tipc_node_attach_link(struct tipc_node *n_ptr, struct link *l_ptr);
void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr);
void tipc_node_link_down(struct tipc_node *n_ptr, struct link *l_ptr);
void tipc_node_link_up(struct tipc_node *n_ptr, struct link *l_ptr);
--
1.7.3.3
next prev parent reply other threads:[~2011-03-13 21:34 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-13 21:33 [PATCH net-next 00/26] tipc: Yet another mixed bag of updates Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 01/26] tipc: Allow receiving into iovec containing multiple entries Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 02/26] tipc: Correct broadcast link peer info when displaying links Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 03/26] tipc: Add network address mask helper routines Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 04/26] tipc: Prevent null pointer error when removing a node subscription Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 05/26] tipc: Cosmetic changes to node subscription code Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 06/26] tipc: Add support for SO_RCVTIMEO socket option Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 07/26] tipc: Fix problem with missing link in "tipc-config -l" output Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 08/26] tipc: Split up unified structure of network-related variables Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 09/26] tipc: Eliminate configuration for maximum number of cluster nodes Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 10/26] tipc: Convert node object array to a hash table Paul Gortmaker
2011-03-13 21:33 ` [PATCH net-next 11/26] tipc: manually inline net_start/stop, make assoc. vars static Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 12/26] tipc: Eliminate timestamp from link protocol messages Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 13/26] tipc: cosmetic - function names are not to be full sentences Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 14/26] tipc: make msg_set_redundant_link() consistent with other set ops Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 15/26] tipc: Fix redundant link field handling in link protocol message Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 16/26] tipc: Cosmetic changes to neighbor discovery logic Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 17/26] tipc: Give Tx of discovery responses priority over link messages Paul Gortmaker
2011-03-13 21:34 ` Paul Gortmaker [this message]
2011-03-13 21:34 ` [PATCH net-next 19/26] tipc: Correct misnamed references to neighbor discovery domain Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 20/26] tipc: Remove unused field in bearer structure Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 21/26] tipc: Eliminate unnecessary constant for neighbor discovery msg size Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 22/26] tipc: Don't respond to neighbor discovery request on blocked bearer Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 23/26] tipc: Remove bearer flag indicating existence of broadcast address Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 24/26] tipc: Eliminate remaining support for routing table messages Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 25/26] tipc: Eliminate obsolete routine for handling routed messages Paul Gortmaker
2011-03-13 21:34 ` [PATCH net-next 26/26] tipc: Update maintenance information Paul Gortmaker
2011-03-14 1:53 ` [PATCH net-next 00/26] tipc: Yet another mixed bag of updates David Miller
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