[Qemu-devel] [V11 09/15] virtio-9p: Rename in chroot environment

["M. Mohan Kumar" <mohan@in.ibm.com>]

From: "M. Mohan Kumar" <mohan@in.ibm.com>

Support renaming a file or directory in chroot envirnoment. Add
interfaces for renaming in chroot worker and qemu side.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
---
 hw/9pfs/virtio-9p-chroot-worker.c |   17 +++++++++++++++++
 hw/9pfs/virtio-9p-chroot.h        |    1 +
 hw/9pfs/virtio-9p-local.c         |    3 +++
 3 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/hw/9pfs/virtio-9p-chroot-worker.c b/hw/9pfs/virtio-9p-chroot-worker.c
index f269c7b..9bb94f2 100644
--- a/hw/9pfs/virtio-9p-chroot-worker.c
+++ b/hw/9pfs/virtio-9p-chroot-worker.c
@@ -184,6 +184,20 @@ static int chroot_do_remove(V9fsFileObjectRequest *request)
     return 0;
 }
 
+/*
+ * Rename a file object
+ */
+static int chroot_do_rename(V9fsFileObjectRequest *request)
+{
+    int retval;
+
+    retval = rename(request->path.old_path, request->path.path);
+    if (retval < 0) {
+        return -errno;
+    }
+    return 0;
+}
+
 static void chroot_daemonize(int chroot_sock)
 {
     sigset_t sigset;
@@ -290,6 +304,9 @@ int v9fs_chroot(FsContext *fs_ctx)
         case T_REMOVE:
             retval = chroot_do_remove(&request);
             break;
+        case T_RENAME:
+            retval = chroot_do_rename(&request);
+            break;
         default:
             retval = -1;
             break;
diff --git a/hw/9pfs/virtio-9p-chroot.h b/hw/9pfs/virtio-9p-chroot.h
index 9d69739..fda60af 100644
--- a/hw/9pfs/virtio-9p-chroot.h
+++ b/hw/9pfs/virtio-9p-chroot.h
@@ -10,6 +10,7 @@
 #define T_SYMLINK   5
 #define T_LINK      6
 #define T_REMOVE    7
+#define T_RENAME    8
 
 #define V9FS_FD_VALID INT_MAX
 
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index f2d66e1..864a464 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -582,6 +582,9 @@ static int local_rename(FsContext *ctx, const char *oldpath,
 {
     char buffer[PATH_MAX], buffer1[PATH_MAX];
 
+    if (ctx->fs_sm == SM_PASSTHROUGH) {
+        return passthrough_request(ctx, oldpath, newpath, 0, NULL, T_RENAME);
+    }
     return rename(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
 }
 
-- 
1.7.5.4