linux-toradex.git/net/tipc/net.c, branch v3.3.2

tipc: Eliminate dynamic allocation of broadcast link data structures

2011-12-27T16:33:47+00:00

Creates global variables to hold the broadcast link's pseudo-bearer and
pseudo-link structures, rather than allocating them dynamically. There
is only a single instance of each structure, and changing over to static
allocation allows elimination of code to handle the cases where dynamic
allocation was unsuccessful.

The memset in the teardown code may look like they aren't used, but
the same teardown code is run when there is a non-fatal error at
init-time, so that stale data isn't present when the user fixes the
cause of the soft error.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: Minor correction to TIPC module unloading

2011-12-27T16:33:45+00:00

Modifies TIPC's module unloading logic to switch itself into "single
node" mode before starting to terminate networking support. This helps
to ensure that no operations that require TIPC to be in "networking"
mode can initiate once unloading starts.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: Remove obsolete manipulation of message re-route count field

2011-09-01T15:16:35+00:00

Eliminates code that increments and validates the re-route count field
of payload messages, since the elimination of multi-cluster support
means that it is no longer necessary for TIPC to forward incoming messages
to another node. (The obsolete code was incorrect anyway, since it
incorrectly incremented the re-route count field of messages that
originated on the node that forwarded the message.)

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: delete extra semicolon blocking node deletion

2011-03-14T16:21:12+00:00

Remove bogus semicolon only recently introduced in 34e46258cb9f5
that blocks cleanup of nodes for N>1 on shutdown.

Signed-off-by: Paul Gortmaker

tipc: manually inline net_start/stop, make assoc. vars static

2011-03-13T20:35:17+00:00

Relocates network-related variables into the subsystem files where
they are now primarily used (following the recent rework of TIPC's
node table), and converts globals into locals where possible. Changes
the initialization of tipc_num_links from run-time to compile-time,
and eliminates the net_start routine that becomes empty as a result.
Also eliminates the corresponding net_stop routine by moving its
(trivial) content into the one location that called the routine.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: Convert node object array to a hash table

2011-03-13T20:35:17+00:00

Replaces the dynamically allocated array of pointers to the cluster's
node objects with a static hash table. Hash collisions are resolved
using chaining, with a typical hash chain having only a single node,
to avoid degrading performance during processing of incoming packets.
The conversion to a hash table reduces the memory requirements for
TIPC's node table to approximately the same size it had prior to
the previous commit.

In addition to the hash table itself, TIPC now also maintains a
linked list for the node objects, sorted by ascending network address.
This list allows TIPC to continue sending responses to user space
applications that request node and link information in sorted order.
The list also improves performance when name table update messages are
sent by making it easier to identify the nodes that must be notified.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: Eliminate configuration for maximum number of cluster nodes

2011-03-13T20:35:17+00:00

Gets rid of the need for users to specify the maximum number of
cluster nodes supported by TIPC. TIPC now automatically provides
support for all 4K nodes allowed by its addressing scheme.

Note: This change sets TIPC's memory usage to the amount used by
a maximum size node table with 4K entries.  An upcoming patch that
converts the node table from a linear array to a hash table will
compact the node table to a more efficient design, but for clarity
it is nice to have all the Kconfig infrastruture go away separately.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: Split up unified structure of network-related variables

2011-03-13T20:35:17+00:00

Converts the fields of the global "tipc_net" structure into individual
variables.  Since the struct was never referenced as a complete unit,
its existence was pointless.  This will facilitate upcoming changes to
TIPC's node table and simpify upcoming relocation of the variables so
they are only visible to the files that actually use them.

This change is essentially cosmetic in nature, and doesn't affect the
operation of TIPC.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: Fix problem with missing link in "tipc-config -l" output

2011-03-13T20:35:16+00:00

Removes a race condition that could cause TIPC's internal counter
of the number of links it has to neighboring nodes to have the
incorrect value if two independent threads of control simultaneously
create new link endpoints connecting to two different nodes using two
different bearers. Such under counting would result in TIPC failing to
list the final link(s) in its response to a configuration request to
list all of the node's links. The counter is now updated atomically
to ensure that simultaneous increments do not interfere with each
other.

Thanks go to Peter Butler  for his assistance in
diagnosing and fixing this problem.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker

tipc: remove redundant #includes

2011-01-01T21:57:54+00:00

Eliminates a number of #include statements that no longer serve any
useful purpose.

Signed-off-by: Allan Stephens 
Signed-off-by: Paul Gortmaker 
Signed-off-by: David S. Miller