Xen devel - Dec 2009 - [PATCH] libxenlight: minimal vfs support

Hi all,
this patch adds minimal support for fs-backend and minios'' fs-front
to libxenlight:

- it creates a vfs directory on the stubdom''s xenstore
device path and allows the stubdom to write to it;

- it doesn''t try to cleany shutdown the vfs backend.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---

diff -r b4c47cfbb9b1 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c	Wed Dec 02 15:02:06 2009 +0000
+++ b/tools/libxl/libxl.c	Wed Dec 02 16:57:15 2009 +0000
@@ -798,6 +798,8 @@
     t = xs_transaction_start(ctx->xsh);
     xs_mkdir(ctx->xsh, t, libxl_sprintf(ctx,
"/local/domain/0/device-model/%d", info->domid));
     xs_set_permissions(ctx->xsh, t, libxl_sprintf(ctx,
"/local/domain/0/device-model/%d", info->domid), perm,
ARRAY_SIZE(perm));
+    xs_mkdir(ctx->xsh, t, libxl_sprintf(ctx,
"/local/domain/%d/device/vfs", domid));
+    xs_set_permissions(ctx->xsh, t, libxl_sprintf(ctx,
"/local/domain/%d/device/vfs",domid), perm, ARRAY_SIZE(perm));
     if (!xs_transaction_end(ctx->xsh, t, 0))
         if (errno == EAGAIN)
             goto retry_transaction;
diff -r b4c47cfbb9b1 tools/libxl/libxl_device.c
--- a/tools/libxl/libxl_device.c	Wed Dec 02 15:02:06 2009 +0000
+++ b/tools/libxl/libxl_device.c	Wed Dec 02 16:57:15 2009 +0000
@@ -224,6 +224,8 @@
         return -1;
     }
     for (i = 0; i < num1; i++) {
+        if (!strcmp("vfs", l1[i]))
+            continue;
         path = libxl_sprintf(&clone,
"/local/domain/%d/device/%s", domid, l1[i]);
         l2 = libxl_xs_directory(&clone, XBT_NULL, path, &num2);
         if (!l2)

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