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authorVenkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>2011-02-06 12:08:01 -0800
committerEric Van Hensbergen <ericvh@gmail.com>2011-03-15 09:57:35 -0500
commit6f69c395cefb26ebba2c9bb725296a3a4a9200ec (patch)
tree7012a54d7bef23aef8a14b938d329d87609d8937
parent4038866dab4e461e0ef144458bad9d70ce0c98c1 (diff)
[net/9p] Add preferences to transport layer.
This patch adds preferences field to the p9_trans_module. Through this, now transport layer can express its preference about the payload. i.e if payload neds to be part of the PDU or it prefers it to be sent sepearetly so that the transport layer can handle it in a better way. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
-rw-r--r--include/net/9p/transport.h9
-rw-r--r--net/9p/trans_virtio.c1
2 files changed, 10 insertions, 0 deletions
diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h
index 6d5886efb102..82868f18c573 100644
--- a/include/net/9p/transport.h
+++ b/include/net/9p/transport.h
@@ -26,11 +26,19 @@
#ifndef NET_9P_TRANSPORT_H
#define NET_9P_TRANSPORT_H
+#define P9_TRANS_PREF_PAYLOAD_MASK 0x1
+
+/* Default. Add Payload to PDU before sending it down to transport layer */
+#define P9_TRANS_PREF_PAYLOAD_DEF 0x0
+/* Send pay load seperately to transport layer along with PDU.*/
+#define P9_TRANS_PREF_PAYLOAD_SEP 0x1
+
/**
* struct p9_trans_module - transport module interface
* @list: used to maintain a list of currently available transports
* @name: the human-readable name of the transport
* @maxsize: transport provided maximum packet size
+ * @pref: Preferences of this transport
* @def: set if this transport should be considered the default
* @create: member function to create a new connection on this transport
* @request: member function to issue a request to the transport
@@ -47,6 +55,7 @@ struct p9_trans_module {
struct list_head list;
char *name; /* name of transport */
int maxsize; /* max message size of transport */
+ int pref; /* Preferences of this transport */
int def; /* this transport should be default */
struct module *owner;
int (*create)(struct p9_client *, const char *, char *);
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 4b236de132da..9b550ed9c711 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -566,6 +566,7 @@ static struct p9_trans_module p9_virtio_trans = {
.request = p9_virtio_request,
.cancel = p9_virtio_cancel,
.maxsize = PAGE_SIZE*16,
+ .pref = P9_TRANS_PREF_PAYLOAD_SEP,
.def = 0,
.owner = THIS_MODULE,
};