[libvirt] [PATCH] [RFC] xen domctl version 6
Daniel Veillard
veillard at redhat.com
Wed Jan 6 10:01:33 UTC 2010
On Wed, Dec 23, 2009 at 10:59:09AM -0700, Jim Fehlig wrote:
> xen-unstable c/s 20685 changed the domctl interface, adding a field to
> xen_domctl_getdomaininfo structure. This additional field causes stack
> corruption in libvirt. xen-unstable c/s 20711 rightly bumped the domctl
> interface version so it is at least possible to handle the new field.
>
> The attached patch accounts for shr_pages field added to
> xen_domctl_getdomaininfo structure. I'm not thrilled about the changes
> to all the macros - suggestions for improvement welcomed.
>
> Tested with domctl version 5 and 6.
Yeah, we don't really have much choice there I think, but I would
make the macros a bit more forward optimistic, i.e replacing
(dom_interface_version == 6 ?
with
(dom_interface_version >= 6 ?
if there is a new bump, the call should not fail because we didn't
updated all the macros.
otherwise looks fine, ACK to a new patch with this,
Daniel
> Index: libvirt-0.7.4/src/xen/xen_hypervisor.c
> ===================================================================
> --- libvirt-0.7.4.orig/src/xen/xen_hypervisor.c
> +++ libvirt-0.7.4/src/xen/xen_hypervisor.c
> @@ -215,10 +215,26 @@ struct xen_v2d5_getdomaininfo {
> };
> typedef struct xen_v2d5_getdomaininfo xen_v2d5_getdomaininfo;
>
> +struct xen_v2d6_getdomaininfo {
> + domid_t domain; /* the domain number */
> + uint32_t flags; /* flags, see before */
> + uint64_t tot_pages ALIGN_64; /* total number of pages used */
> + uint64_t max_pages ALIGN_64; /* maximum number of pages allowed */
> + uint64_t shr_pages ALIGN_64; /* number of shared pages */
> + uint64_t shared_info_frame ALIGN_64; /* MFN of shared_info struct */
> + uint64_t cpu_time ALIGN_64; /* CPU time used */
> + uint32_t nr_online_vcpus; /* Number of VCPUs currently online. */
> + uint32_t max_vcpu_id; /* Maximum VCPUID in use by this domain. */
> + uint32_t ssidref;
> + xen_domain_handle_t handle;
> +};
> +typedef struct xen_v2d6_getdomaininfo xen_v2d6_getdomaininfo;
> +
> union xen_getdomaininfo {
> struct xen_v0_getdomaininfo v0;
> struct xen_v2_getdomaininfo v2;
> struct xen_v2d5_getdomaininfo v2d5;
> + struct xen_v2d6_getdomaininfo v2d6;
> };
> typedef union xen_getdomaininfo xen_getdomaininfo;
>
> @@ -226,6 +242,7 @@ union xen_getdomaininfolist {
> struct xen_v0_getdomaininfo *v0;
> struct xen_v2_getdomaininfo *v2;
> struct xen_v2d5_getdomaininfo *v2d5;
> + struct xen_v2d6_getdomaininfo *v2d6;
> };
> typedef union xen_getdomaininfolist xen_getdomaininfolist;
>
> @@ -263,114 +280,147 @@ typedef struct xen_v2s5_availheap xen_v
> #define XEN_GETDOMAININFOLIST_ALLOC(domlist, size) \
> (hypervisor_version < 2 ? \
> (VIR_ALLOC_N(domlist.v0, (size)) == 0) : \
> - (dom_interface_version < 5 ? \
> - (VIR_ALLOC_N(domlist.v2, (size)) == 0) : \
> - (VIR_ALLOC_N(domlist.v2d5, (size)) == 0)))
> + (dom_interface_version == 6 ? \
> + (VIR_ALLOC_N(domlist.v2d6, (size)) == 0) : \
> + (dom_interface_version == 5 ? \
> + (VIR_ALLOC_N(domlist.v2d5, (size)) == 0) : \
> + (VIR_ALLOC_N(domlist.v2, (size)) == 0))))
>
> #define XEN_GETDOMAININFOLIST_FREE(domlist) \
> (hypervisor_version < 2 ? \
> VIR_FREE(domlist.v0) : \
> - (dom_interface_version < 5 ? \
> - VIR_FREE(domlist.v2) : \
> - VIR_FREE(domlist.v2d5)))
> + (dom_interface_version == 6 ? \
> + VIR_FREE(domlist.v2d6) : \
> + (dom_interface_version == 5 ? \
> + VIR_FREE(domlist.v2d5) : \
> + VIR_FREE(domlist.v2))))
>
> #define XEN_GETDOMAININFOLIST_CLEAR(domlist, size) \
> (hypervisor_version < 2 ? \
> memset(domlist.v0, 0, sizeof(*domlist.v0) * size) : \
> - (dom_interface_version < 5 ? \
> - memset(domlist.v2, 0, sizeof(*domlist.v2) * size) : \
> - memset(domlist.v2d5, 0, sizeof(*domlist.v2d5) * size)))
> + (dom_interface_version == 6 ? \
> + memset(domlist.v2d6, 0, sizeof(*domlist.v2d6) * size) : \
> + (dom_interface_version == 5 ? \
> + memset(domlist.v2d5, 0, sizeof(*domlist.v2d5) * size) : \
> + memset(domlist.v2, 0, sizeof(*domlist.v2) * size))))
>
> #define XEN_GETDOMAININFOLIST_DOMAIN(domlist, n) \
> (hypervisor_version < 2 ? \
> domlist.v0[n].domain : \
> - (dom_interface_version < 5 ? \
> - domlist.v2[n].domain : \
> - domlist.v2d5[n].domain))
> + (dom_interface_version == 6 ? \
> + domlist.v2d6[n].domain : \
> + (dom_interface_version == 5 ? \
> + domlist.v2d5[n].domain : \
> + domlist.v2[n].domain)))
>
> #define XEN_GETDOMAININFOLIST_UUID(domlist, n) \
> (hypervisor_version < 2 ? \
> domlist.v0[n].handle : \
> - (dom_interface_version < 5 ? \
> - domlist.v2[n].handle : \
> - domlist.v2d5[n].handle))
> + (dom_interface_version == 6 ? \
> + domlist.v2d6[n].handle : \
> + (dom_interface_version == 5 ? \
> + domlist.v2d5[n].handle : \
> + domlist.v2[n].handle)))
>
> #define XEN_GETDOMAININFOLIST_DATA(domlist) \
> (hypervisor_version < 2 ? \
> (void*)(domlist->v0) : \
> - (dom_interface_version < 5 ? \
> - (void*)(domlist->v2) : \
> - (void*)(domlist->v2d5)))
> + (dom_interface_version == 6 ? \
> + (void*)(domlist->v2d6) : \
> + (dom_interface_version == 5 ? \
> + (void*)(domlist->v2d5) : \
> + (void*)(domlist->v2))))
>
> #define XEN_GETDOMAININFO_SIZE \
> (hypervisor_version < 2 ? \
> sizeof(xen_v0_getdomaininfo) : \
> - (dom_interface_version < 5 ? \
> - sizeof(xen_v2_getdomaininfo) : \
> - sizeof(xen_v2d5_getdomaininfo)))
> + (dom_interface_version == 6 ? \
> + sizeof(xen_v2d6_getdomaininfo) : \
> + (dom_interface_version == 5 ? \
> + sizeof(xen_v2d5_getdomaininfo) : \
> + sizeof(xen_v2_getdomaininfo))))
>
> #define XEN_GETDOMAININFO_CLEAR(dominfo) \
> (hypervisor_version < 2 ? \
> memset(&(dominfo.v0), 0, sizeof(xen_v0_getdomaininfo)) : \
> - (dom_interface_version < 5 ? \
> - memset(&(dominfo.v2), 0, sizeof(xen_v2_getdomaininfo)) : \
> - memset(&(dominfo.v2d5), 0, sizeof(xen_v2d5_getdomaininfo))))
> + (dom_interface_version == 6 ? \
> + memset(&(dominfo.v2d6), 0, sizeof(xen_v2d6_getdomaininfo)) : \
> + (dom_interface_version == 5 ? \
> + memset(&(dominfo.v2d5), 0, sizeof(xen_v2d5_getdomaininfo)) : \
> + memset(&(dominfo.v2), 0, sizeof(xen_v2_getdomaininfo)))))
>
> #define XEN_GETDOMAININFO_DOMAIN(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.domain : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.domain : \
> - dominfo.v2d5.domain))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.domain : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.domain : \
> + dominfo.v2.domain)))
>
> #define XEN_GETDOMAININFO_CPUTIME(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.cpu_time : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.cpu_time : \
> - dominfo.v2d5.cpu_time))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.cpu_time : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.cpu_time : \
> + dominfo.v2.cpu_time)))
> +
>
> #define XEN_GETDOMAININFO_CPUCOUNT(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.nr_online_vcpus : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.nr_online_vcpus : \
> - dominfo.v2d5.nr_online_vcpus))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.nr_online_vcpus : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.nr_online_vcpus : \
> + dominfo.v2.nr_online_vcpus)))
>
> #define XEN_GETDOMAININFO_MAXCPUID(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.max_vcpu_id : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.max_vcpu_id : \
> - dominfo.v2d5.max_vcpu_id))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.max_vcpu_id : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.max_vcpu_id : \
> + dominfo.v2.max_vcpu_id)))
>
> #define XEN_GETDOMAININFO_FLAGS(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.flags : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.flags : \
> - dominfo.v2d5.flags))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.flags : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.flags : \
> + dominfo.v2.flags)))
>
> #define XEN_GETDOMAININFO_TOT_PAGES(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.tot_pages : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.tot_pages : \
> - dominfo.v2d5.tot_pages))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.tot_pages : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.tot_pages : \
> + dominfo.v2.tot_pages)))
>
> #define XEN_GETDOMAININFO_MAX_PAGES(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.max_pages : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.max_pages : \
> - dominfo.v2d5.max_pages))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.max_pages : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.max_pages : \
> + dominfo.v2.max_pages)))
>
> #define XEN_GETDOMAININFO_UUID(dominfo) \
> (hypervisor_version < 2 ? \
> dominfo.v0.handle : \
> - (dom_interface_version < 5 ? \
> - dominfo.v2.handle : \
> - dominfo.v2d5.handle))
> + (dom_interface_version == 6 ? \
> + dominfo.v2d6.handle : \
> + (dom_interface_version == 5 ? \
> + dominfo.v2d5.handle : \
> + dominfo.v2.handle)))
>
>
> static int
> @@ -2050,6 +2100,12 @@ xenHypervisorInit(void)
> DEBUG0("Using hypervisor call v2, sys ver6 dom ver5\n");
> goto done;
> }
> + /* Xen 4.0 */
> + dom_interface_version = 6; /* XEN_DOMCTL_INTERFACE_VERSION */
> + if (virXen_getvcpusinfo(fd, 0, 0, ipt, NULL, 0) == 0){
> + DEBUG0("Using hypervisor call v2, sys ver6 dom ver6\n");
> + goto done;
> + }
> }
>
> hypervisor_version = 1;
> --
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--
Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
daniel at veillard.com | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library http://libvirt.org/
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