[Qemu-devel] [RFC PATCH -V1 3/4] hw/9pfs: Implement syncfs

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 hw/9pfs/virtio-9p.c |   31 +++++++++++++++++++++++++++++++
 hw/9pfs/virtio-9p.h |    2 ++
 2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 2d9ca11..1518e00 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -1978,6 +1978,36 @@ static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu)
     v9fs_post_do_fsync(s, pdu, err);
 }
 
+static void v9fs_post_do_syncfs(V9fsState *s, V9fsPDU *pdu, int err)
+{
+    if (err == -1) {
+        err = -errno;
+    }
+    complete_pdu(s, pdu, err);
+}
+
+static void v9fs_syncfs(V9fsState *s, V9fsPDU *pdu)
+{
+    int err;
+    int32_t fid;
+    size_t offset = 7;
+    V9fsFidState *fidp;
+
+    pdu_unmarshal(pdu, offset, "d", &fid);
+    fidp = lookup_fid(s, fid);
+    if (fidp == NULL) {
+        err = -ENOENT;
+        v9fs_post_do_syncfs(s, pdu, err);
+        return;
+    }
+    /*
+     * We don't have per file system syncfs
+     * So just return success
+     */
+    err = 0;
+    v9fs_post_do_syncfs(s, pdu, err);
+}
+
 static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
 {
     int32_t fid;
@@ -3676,6 +3706,7 @@ static pdu_handler_t *pdu_handlers[] = {
     [P9_TWALK] = v9fs_walk,
     [P9_TCLUNK] = v9fs_clunk,
     [P9_TFSYNC] = v9fs_fsync,
+    [P9_TSYNCFS] = v9fs_syncfs,
     [P9_TOPEN] = v9fs_open,
     [P9_TREAD] = v9fs_read,
 #if 0
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index 82b4252..b2cd24b 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -13,6 +13,8 @@
 #define VIRTIO_9P_MOUNT_TAG 0
 
 enum {
+    P9_TSYNCFS = 0,
+    P9_RSYNCFS,
     P9_TLERROR = 6,
     P9_RLERROR,
     P9_TSTATFS = 8,
-- 
1.7.1