[Xen-changelog] [xen-unstable] libxl: add sched_get_id function

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1271925519 -3600
# Node ID 8567087654f0d6ec42636aaed46bc4d7ad9c40bc
# Parent  a02f1de9b8a32b1cb37ebfee79a7a994994c1989
libxl: add sched_get_id function

To get the name of the currently used scheduler, Xen provides a
sched_id sysctl. Add a libxl wrapper around the libxc function to
query this.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
Acked-by: Vincent Hanquez <vincent.hanquez@xxxxxxxxxxxxx>
---
 tools/libxl/libxl.c |   13 +++++++++++++
 tools/libxl/libxl.h |    2 ++
 2 files changed, 15 insertions(+)

diff -r a02f1de9b8a3 -r 8567087654f0 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c       Thu Apr 22 09:37:31 2010 +0100
+++ b/tools/libxl/libxl.c       Thu Apr 22 09:38:39 2010 +0100
@@ -2421,3 +2421,16 @@ int libxl_set_vcpucount(struct libxl_ctx
     }
     return 0;
 }
+
+/*
+ * returns one of the XEN_SCHEDULER_* constants from public/domctl.h
+ * or -1 if an error occured.
+ */
+int libxl_get_sched_id(struct libxl_ctx *ctx)
+{
+    int sched, ret;
+
+    if ((ret = xc_sched_id(ctx->xch, &sched)) != 0)
+        return ret;
+    return sched;
+}
diff -r a02f1de9b8a3 -r 8567087654f0 tools/libxl/libxl.h
--- a/tools/libxl/libxl.h       Thu Apr 22 09:37:31 2010 +0100
+++ b/tools/libxl/libxl.h       Thu Apr 22 09:38:39 2010 +0100
@@ -438,5 +438,7 @@ int libxl_set_vcpuaffinity(struct libxl_
 int libxl_set_vcpuaffinity(struct libxl_ctx *ctx, uint32_t domid, uint32_t 
vcpuid,
                            uint64_t *cpumap, int cpusize);
 int libxl_set_vcpucount(struct libxl_ctx *ctx, uint32_t domid, uint32_t count);
+
+int libxl_get_sched_id(struct libxl_ctx *ctx);
 #endif /* LIBXL_H */
 

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