path: root/net/rxrpc/Makefile
diff options
authorDavid Howells <dhowells@redhat.com>2016-04-04 14:00:37 +0100
committerDavid Howells <dhowells@redhat.com>2016-06-22 09:10:02 +0100
commit4a3388c8033e4ea00f06a341d5ed4a20a7da89de (patch)
tree4f4059e4c2decc37a7a886a4a9232fd928170b22 /net/rxrpc/Makefile
parentrxrpc: rxrpc_connection_lock shouldn't be a BH lock, but conn_lock is (diff)
rxrpc: Use IDR to allocate client conn IDs on a machine-wide basis
Use the IDR facility to allocate client connection IDs on a machine-wide basis so that each client connection has a unique identifier. When the connection ID space wraps, we advance the epoch by 1, thereby effectively having a 62-bit ID space. The IDR facility is then used to look up client connections during incoming packet routing instead of using an rbtree rooted on the transport. This change allows for the removal of the transport in the future and also means that client connections can be looked up directly in the data-ready handler by connection ID. The ID management code is placed in a new file, conn-client.c, to which all the client connection-specific code will eventually move. Note that the IDR tree gets very expensive on memory if the connection IDs are widely scattered throughout the number space, so we shall need to retire connections that have, say, an ID more than four times the maximum number of client conns away from the current allocation point to try and keep the IDs concentrated. We will also need to retire connections from an old epoch. Also note that, for the moment, a pointer to the transport has to be passed through into the ID allocation function so that we can take a BH lock to prevent a locking issue against in-BH lookup of client connections. This will go away later when RCU is used for server connections also. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/Makefile')
1 files changed, 1 insertions, 0 deletions
diff --git a/net/rxrpc/Makefile b/net/rxrpc/Makefile
index b005027f80cf..cfa221536f33 100644
--- a/net/rxrpc/Makefile
+++ b/net/rxrpc/Makefile
@@ -7,6 +7,7 @@ af-rxrpc-y := \
call_accept.o \
call_event.o \
call_object.o \
+ conn_client.o \
conn_event.o \
conn_object.o \
input.o \