mirror of https://gitee.com/openkylin/libvirt.git
libxl: refactor capabilities code
Cleanup the libxl capabilities code to be a bit more extensible, splitting out the creation of host and guest capabilities. This should make it easier to implement additional capabilities in the future, such as NUMA topology reporting.
This commit is contained in:
Jim Fehlig
parent
7a7cb0934e
commit
aeab0243e1
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@ -64,126 +64,62 @@ static const char *xen_cap_re = "(xen|hvm)-[[:digit:]]+\\.[[:digit:]]+-(x86_32|x
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static regex_t xen_cap_rec;
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static virCapsPtr
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libxlBuildCapabilities(virArch hostarch,
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int host_pae,
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struct guest_arch *guest_archs,
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int nr_guest_archs)
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static int
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libxlCapsInitHost(libxl_ctx *ctx, virCapsPtr caps)
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{
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virCapsPtr caps;
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size_t i;
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int err;
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libxl_physinfo phy_info;
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int host_pae;
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if ((caps = virCapabilitiesNew(hostarch, 1, 1)) == NULL)
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goto no_memory;
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if (host_pae &&
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virCapabilitiesAddHostFeature(caps, "pae") < 0)
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goto no_memory;
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for (i = 0; i < nr_guest_archs; ++i) {
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virCapsGuestPtr guest;
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char const *const xen_machines[] = {guest_archs[i].hvm ? "xenfv" : "xenpv"};
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virCapsGuestMachinePtr *machines;
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if ((machines = virCapabilitiesAllocMachines(xen_machines, 1)) == NULL)
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goto no_memory;
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if ((guest = virCapabilitiesAddGuest(caps,
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guest_archs[i].hvm ? "hvm" : "xen",
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guest_archs[i].arch,
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((hostarch == VIR_ARCH_X86_64) ?
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"/usr/lib64/xen/bin/qemu-dm" :
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"/usr/lib/xen/bin/qemu-dm"),
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(guest_archs[i].hvm ?
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"/usr/lib/xen/boot/hvmloader" :
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NULL),
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1,
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machines)) == NULL) {
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virCapabilitiesFreeMachines(machines, 1);
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goto no_memory;
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}
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machines = NULL;
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if (virCapabilitiesAddGuestDomain(guest,
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"xen",
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NULL,
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NULL,
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0,
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NULL) == NULL)
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goto no_memory;
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if (guest_archs[i].pae &&
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virCapabilitiesAddGuestFeature(guest,
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"pae",
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1,
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0) == NULL)
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goto no_memory;
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if (guest_archs[i].nonpae &&
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virCapabilitiesAddGuestFeature(guest,
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"nonpae",
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1,
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0) == NULL)
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goto no_memory;
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if (guest_archs[i].ia64_be &&
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virCapabilitiesAddGuestFeature(guest,
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"ia64_be",
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1,
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0) == NULL)
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goto no_memory;
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if (guest_archs[i].hvm) {
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if (virCapabilitiesAddGuestFeature(guest,
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"acpi",
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1,
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1) == NULL)
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goto no_memory;
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if (virCapabilitiesAddGuestFeature(guest, "apic",
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1,
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0) == NULL)
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goto no_memory;
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if (virCapabilitiesAddGuestFeature(guest,
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"hap",
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0,
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1) == NULL)
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goto no_memory;
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}
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err = regcomp(&xen_cap_rec, xen_cap_re, REG_EXTENDED);
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if (err != 0) {
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char error[100];
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regerror(err, &xen_cap_rec, error, sizeof(error));
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regfree(&xen_cap_rec);
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Failed to compile regex %s"), error);
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return -1;
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}
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return caps;
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no_memory:
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virObjectUnref(caps);
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return NULL;
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}
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static virCapsPtr
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libxlMakeCapabilitiesInternal(virArch hostarch,
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libxl_physinfo *phy_info,
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char *capabilities)
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{
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char *str, *token;
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regmatch_t subs[4];
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char *saveptr = NULL;
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size_t i;
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int host_pae = 0;
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struct guest_arch guest_archs[32];
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int nr_guest_archs = 0;
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virCapsPtr caps = NULL;
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memset(guest_archs, 0, sizeof(guest_archs));
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if (libxl_get_physinfo(ctx, &phy_info) != 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Failed to get node physical info from libxenlight"));
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return -1;
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}
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/* hw_caps is an array of 32-bit words whose meaning is listed in
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* xen-unstable.hg/xen/include/asm-x86/cpufeature.h. Each feature
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* is defined in the form X*32+Y, corresponding to the Y'th bit in
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* the X'th 32-bit word of hw_cap.
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*/
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host_pae = phy_info->hw_cap[0] & LIBXL_X86_FEATURE_PAE_MASK;
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host_pae = phy_info.hw_cap[0] & LIBXL_X86_FEATURE_PAE_MASK;
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if (host_pae &&
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virCapabilitiesAddHostFeature(caps, "pae") < 0)
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return -1;
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return 0;
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}
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static int
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libxlCapsInitGuests(libxl_ctx *ctx, virCapsPtr caps)
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{
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const libxl_version_info *ver_info;
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char *str, *token;
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regmatch_t subs[4];
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char *saveptr = NULL;
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size_t i;
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virArch hostarch = caps->host.arch;
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struct guest_arch guest_archs[32];
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int nr_guest_archs = 0;
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memset(guest_archs, 0, sizeof(guest_archs));
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if ((ver_info = libxl_get_version_info(ctx)) == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Failed to get version info from libxenlight"));
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return -1;
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}
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/* Format of capabilities string is documented in the code in
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* xen-unstable.hg/xen/arch/.../setup.c.
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*
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@ -209,7 +145,7 @@ libxlMakeCapabilitiesInternal(virArch hostarch,
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/* Split capabilities string into tokens. strtok_r is OK here because
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* we "own" the buffer. Parse out the features from each token.
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*/
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for (str = capabilities, nr_guest_archs = 0;
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for (str = ver_info->capabilities, nr_guest_archs = 0;
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nr_guest_archs < sizeof(guest_archs) / sizeof(guest_archs[0])
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&& (token = strtok_r(str, " ", &saveptr)) != NULL;
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str = NULL) {
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@ -273,17 +209,80 @@ libxlMakeCapabilitiesInternal(virArch hostarch,
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}
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}
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if ((caps = libxlBuildCapabilities(hostarch,
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host_pae,
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guest_archs,
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nr_guest_archs)) == NULL)
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goto error;
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for (i = 0; i < nr_guest_archs; ++i) {
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virCapsGuestPtr guest;
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char const *const xen_machines[] = {guest_archs[i].hvm ? "xenfv" : "xenpv"};
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virCapsGuestMachinePtr *machines;
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return caps;
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if ((machines = virCapabilitiesAllocMachines(xen_machines, 1)) == NULL)
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return -1;
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error:
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virObjectUnref(caps);
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return NULL;
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if ((guest = virCapabilitiesAddGuest(caps,
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guest_archs[i].hvm ? "hvm" : "xen",
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guest_archs[i].arch,
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((hostarch == VIR_ARCH_X86_64) ?
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"/usr/lib64/xen/bin/qemu-dm" :
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"/usr/lib/xen/bin/qemu-dm"),
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(guest_archs[i].hvm ?
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"/usr/lib/xen/boot/hvmloader" :
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NULL),
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1,
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machines)) == NULL) {
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virCapabilitiesFreeMachines(machines, 1);
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return -1;
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}
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machines = NULL;
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if (virCapabilitiesAddGuestDomain(guest,
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"xen",
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NULL,
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NULL,
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0,
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NULL) == NULL)
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return -1;
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if (guest_archs[i].pae &&
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virCapabilitiesAddGuestFeature(guest,
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"pae",
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1,
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0) == NULL)
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return -1;
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if (guest_archs[i].nonpae &&
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virCapabilitiesAddGuestFeature(guest,
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"nonpae",
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1,
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0) == NULL)
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return -1;
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if (guest_archs[i].ia64_be &&
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virCapabilitiesAddGuestFeature(guest,
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"ia64_be",
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1,
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0) == NULL)
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return -1;
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if (guest_archs[i].hvm) {
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if (virCapabilitiesAddGuestFeature(guest,
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"acpi",
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1,
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1) == NULL)
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return -1;
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if (virCapabilitiesAddGuestFeature(guest, "apic",
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1,
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0) == NULL)
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return -1;
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if (virCapabilitiesAddGuestFeature(guest,
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"hap",
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0,
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1) == NULL)
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return -1;
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}
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}
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return 0;
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}
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static int
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@ -873,35 +872,22 @@ error:
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virCapsPtr
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libxlMakeCapabilities(libxl_ctx *ctx)
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{
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int err;
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libxl_physinfo phy_info;
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const libxl_version_info *ver_info;
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virCapsPtr caps;
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err = regcomp(&xen_cap_rec, xen_cap_re, REG_EXTENDED);
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if (err != 0) {
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char error[100];
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regerror(err, &xen_cap_rec, error, sizeof(error));
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regfree(&xen_cap_rec);
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Failed to compile regex %s"), error);
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if ((caps = virCapabilitiesNew(virArchFromHost(), 1, 1)) == NULL)
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return NULL;
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}
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if (libxl_get_physinfo(ctx, &phy_info) != 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Failed to get node physical info from libxenlight"));
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if (libxlCapsInitHost(ctx, caps) < 0)
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goto error;
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if (libxlCapsInitGuests(ctx, caps) < 0)
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goto error;
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return caps;
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error:
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virObjectUnref(caps);
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return NULL;
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}
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if ((ver_info = libxl_get_version_info(ctx)) == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Failed to get version info from libxenlight"));
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return NULL;
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}
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return libxlMakeCapabilitiesInternal(virArchFromHost(),
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&phy_info,
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ver_info->capabilities);
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}
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int
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