[virtio-9p] Add datasync to server side TFSYNC/RFSYNC for dotl
SYNOPSIS
size[4] Tfsync tag[2] fid[4] datasync[4]
size[4] Rfsync tag[2]
DESCRIPTION
The Tfsync transaction transfers ("flushes") all modified in-core data of
file identified by fid to the disk device (or other permanent storage
device) where that file resides.
If datasync flag is specified data will be fleshed but does not flush
modified metadata unless that metadata is needed in order to allow a
subsequent data retrieval to be correctly handled.
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c
index daade77..7c59988 100644
--- a/hw/virtio-9p.c
+++ b/hw/virtio-9p.c
@@ -248,9 +248,9 @@
return s->ops->remove(&s->ctx, path->data);
}
-static int v9fs_do_fsync(V9fsState *s, int fd)
+static int v9fs_do_fsync(V9fsState *s, int fd, int datasync)
{
- return s->ops->fsync(&s->ctx, fd);
+ return s->ops->fsync(&s->ctx, fd, datasync);
}
static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
@@ -1868,16 +1868,17 @@
int32_t fid;
size_t offset = 7;
V9fsFidState *fidp;
+ int datasync;
int err;
- pdu_unmarshal(pdu, offset, "d", &fid);
+ pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
fidp = lookup_fid(s, fid);
if (fidp == NULL) {
err = -ENOENT;
v9fs_post_do_fsync(s, pdu, err);
return;
}
- err = v9fs_do_fsync(s, fidp->fs.fd);
+ err = v9fs_do_fsync(s, fidp->fs.fd, datasync);
v9fs_post_do_fsync(s, pdu, err);
}
@@ -3001,7 +3002,7 @@
/* do we need to sync the file? */
if (donttouch_stat(&vs->v9stat)) {
- err = v9fs_do_fsync(s, vs->fidp->fs.fd);
+ err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
v9fs_wstat_post_fsync(s, vs, err);
return;
}
