Re: [Xen-devel] [PATCH 1/4] xen: Take into account Xen control interface changes since Xen Ver. 4.1

[Rajendra Bele <belerajendra753@xxxxxxxxx>]

Dear Friends,
I am pursuing Ph.D. in virtualization,
I want to study detail architecture and implementation of Xen
As I wanted to start from scratch ,can you suggest some guidance or resource for it.
Thanking you

Rajendra Bele

Pune,India

On Sun, Aug 21, 2011 at 7:36 PM, Daniel Kiper <dkiper@xxxxxxxxxxxx> wrote:

xc_interface_open() receive three arguments instead of void and returns
pointer to xc_interface type instead of int since Xen Ver. 4.1. Take into
account that and allow kexec-tools compilation with all versions of Xen.

Signed-off-by: Daniel Kiper <dkiper@xxxxxxxxxxxx>
---
 kexec/crashdump-xen.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/kexec/crashdump-xen.c b/kexec/crashdump-xen.c
index b347764..9dfabf8 100644
--- a/kexec/crashdump-xen.c
+++ b/kexec/crashdump-xen.c
@@ -126,19 +126,32 @@ unsigned long xen_architecture(struct crash_elf_info *elf_info)
 {
       unsigned long machine = elf_info->machine;
 #ifdef HAVE_LIBXENCTRL
-       int xc, rc;
+       int rc;
       xen_capabilities_info_t capabilities;
+#ifdef XENCTRL_HAS_XC_INTERFACE
+       xc_interface *xc;
+#else
+       int xc;
+#endif

       if (!xen_present())
               goto out;

       memset(capabilities, '0', XEN_CAPABILITIES_INFO_LEN);

+#ifdef XENCTRL_HAS_XC_INTERFACE
+       xc = xc_interface_open(NULL, NULL, 0);
+       if ( !xc ) {
+               fprintf(stderr, "failed to open xen control interface.\n");
+               goto out;
+       }
+#else
       xc = xc_interface_open();
       if ( xc == -1 ) {
               fprintf(stderr, "failed to open xen control interface.\n");
               goto out;
       }
+#endif

       rc = xc_version(xc, XENVER_capabilities, &capabilities[0]);
       if ( rc == -1 ) {
--
1.5.6.5

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