From e4e414a427e0d7ff799e1b3ae9413c82f99b923f Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Date: Sat, 7 May 2011 17:21:38 +0530
Subject: hw/9pfs: Update v9fs_getlock to use coroutines

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 hw/9pfs/virtio-9p.c | 42 +++++++++++++++++++-----------------------
 hw/9pfs/virtio-9p.h |  9 ---------
 2 files changed, 19 insertions(+), 32 deletions(-)

diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 13e7c30..10312c9 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -3049,42 +3049,38 @@ out:
  * When a TGETLOCK request comes, always return success because all lock
  * handling is done by client's VFS layer.
  */
-
 static void v9fs_getlock(void *opaque)
 {
+    size_t offset = 7;
+    struct stat stbuf;
+    V9fsFidState *fidp;
+    V9fsGetlock *glock;
+    int32_t fid, err = 0;
     V9fsPDU *pdu = opaque;
     V9fsState *s = pdu->s;
-    int32_t fid, err = 0;
-    V9fsGetlockState *vs;
 
-    vs = g_malloc0(sizeof(*vs));
-    vs->pdu = pdu;
-    vs->offset = 7;
-
-    vs->glock = g_malloc(sizeof(*vs->glock));
-    pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
-                &vs->glock->start, &vs->glock->length, &vs->glock->proc_id,
-		&vs->glock->client_id);
+    glock = g_malloc(sizeof(*glock));
+    pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock->type,
+                  &glock->start, &glock->length, &glock->proc_id,
+                  &glock->client_id);
 
-    vs->fidp = lookup_fid(s, fid);
-    if (vs->fidp == NULL) {
+    fidp = lookup_fid(s, fid);
+    if (fidp == NULL) {
         err = -ENOENT;
         goto out;
     }
-
-    err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
+    err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf);
     if (err < 0) {
-        err = -errno;
         goto out;
     }
-    vs->glock->type = F_UNLCK;
-    vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
-                vs->glock->start, vs->glock->length, vs->glock->proc_id,
-		&vs->glock->client_id);
+    glock->type = F_UNLCK;
+    offset += pdu_marshal(pdu, offset, "bqqds", glock->type,
+                          glock->start, glock->length, glock->proc_id,
+                          &glock->client_id);
+    err = offset;
 out:
-    complete_pdu(s, vs->pdu, err);
-    g_free(vs->glock);
-    g_free(vs);
+    complete_pdu(s, pdu, err);
+    g_free(glock);
 }
 
 static void v9fs_mkdir(void *opaque)
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index 0c1e3ee..edf3413 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -412,15 +412,6 @@ typedef struct V9fsGetlock
     V9fsString client_id;
 } V9fsGetlock;
 
-typedef struct V9fsGetlockState
-{
-    V9fsPDU *pdu;
-    size_t offset;
-    struct stat stbuf;
-    V9fsFidState *fidp;
-    V9fsGetlock *glock;
-} V9fsGetlockState;
-
 size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
                       size_t offset, size_t size, int pack);
 
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