commit 5e94c103a0321ca47deb81643839c44a03047416
author M. Mohan Kumar <mohan@in.ibm.com> Wed Jun 09 19:14:28 2010 +0530
committer Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Wed Sep 08 22:56:39 2010 +0530
tree 14ba64e29983274aac474dff15ac2c9f98ec7527
parent c18e2f9431dab6ae02195e3b4b8ba61d0dbd2cb8

virtio-9p: Compute iounit based on host filesystem block size

Compute iounit based on the host filesystem block size and pass it to
client with open/create response. Also return iounit as statfs's f_bsize
for optimal block size transfers.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reviewd-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>

hw/virtio-9p.h

diff --git a/hw/virtio-9p.h b/hw/virtio-9p.h
index 9773659..4ee3830 100644
--- a/hw/virtio-9p.h
+++ b/hw/virtio-9p.h
@@ -70,6 +70,12 @@
 #define P9_NOFID    (u32)(~0)
 #define P9_MAXWELEM 16
 
+/*
+ * ample room for Twrite/Rread header
+ * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
+ */
+#define P9_IOHDRSZ 24
+
 typedef struct V9fsPDU V9fsPDU;
 
 struct V9fsPDU
@@ -154,6 +160,7 @@
     uint8_t *tag;
     size_t config_size;
     enum p9_proto_version proto_version;
+    int32_t msize;
 } V9fsState;
 
 typedef struct V9fsCreateState {
@@ -167,6 +174,7 @@
     V9fsString name;
     V9fsString extension;
     V9fsString fullname;
+    int iounit;
 } V9fsCreateState;
 
 typedef struct V9fsStatState {
@@ -197,6 +205,7 @@
     V9fsFidState *fidp;
     V9fsQID qid;
     struct stat stbuf;
+    int iounit;
 } V9fsOpenState;
 
 typedef struct V9fsReadState {