[Xen-changelog] [xen-unstable] libxenlight: minimal vfs support

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1260258285 0
# Node ID 696f94dfad26ca79f9d7b952df50e5d768339ea4
# Parent  0fb962a5dad34cb2fd20b7c76aab73c21e2cf992
libxenlight: minimal vfs support

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@xxxxxxxxxxxxx>
---
 tools/libxl/libxl.c        |    2 ++
 tools/libxl/libxl_device.c |    2 ++
 2 files changed, 4 insertions(+)

diff -r 0fb962a5dad3 -r 696f94dfad26 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c       Mon Dec 07 14:10:27 2009 +0000
+++ b/tools/libxl/libxl.c       Tue Dec 08 07:44:45 2009 +0000
@@ -875,6 +875,8 @@ retry_transaction:
     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 0fb962a5dad3 -r 696f94dfad26 tools/libxl/libxl_device.c
--- a/tools/libxl/libxl_device.c        Mon Dec 07 14:10:27 2009 +0000
+++ b/tools/libxl/libxl_device.c        Tue Dec 08 07:44:45 2009 +0000
@@ -254,6 +254,8 @@ int libxl_devices_destroy(struct libxl_c
         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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