Re: [libvirt] [PATCH 10/12] Introduce support for parsing/formatting Xen xl config format

Introduce a parser/formatter for the xl config format. Since the deprecation of xm/xend, the VM config file format has diverged as new features are added to libxl. This patch adds support for parsing and formating the xl config format. It supports the existing xm config format, plus adds support for spice graphics and xl disk config syntax. Disk config is specified a bit differently in xl as compared to xm. In xl, disk config consists of comma-separated positional parameters and keyword/value pairs separated by commas. Positional parameters are specified as follows target, format, vdev, access Supported keys for key=value options are devtype, backend, backendtype, script, direct-io-safe, The positional paramters can also be specified in key/value form. For example the following xl disk config are equivalent /dev/vg/guest-volume,,hda /dev/vg/guest-volume,raw,hda,rw format=raw, vdev=hda, access=rw, target=/dev/vg/guest-volume See $xen_sources/docs/misc/xl-disk-configuration.txt for more details. xl disk config is parsed with the help of xlu_disk_parse() from libxlutil, libxl's utility library. Although the library exists in all Xen versions supported by the libxl virt driver, only recently has the corresponding header file been included. A check for the header is done in configure.ac. If not found, xlu_disk_parse() is declared externally. Signed-off-by: Kiarie Kahurani <davidkiarie4(a)gmail.com&gt; Signed-off-by: Jim Fehlig <jfehlig(a)suse.com&gt; --- configure.ac | 3 + po/POTFILES.in | 1 + src/Makefile.am | 4 +- src/libvirt_xenconfig.syms | 4 + src/xenconfig/xen_common.c | 3 +- src/xenconfig/xen_xl.c | 492 +++++++++++++++++++++++++++++++++++++++++++++ src/xenconfig/xen_xl.h | 33 +++ 7 files changed, 538 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac index 9d12079..f370475 100644 --- a/configure.ac +++ b/configure.ac @@ -891,6 +891,9 @@ if test $fail = 1; then fi if test "$with_libxl" = "yes"; then + dnl If building with libxl, use the libxl utility header and lib too + AC_CHECK_HEADERS([libxlutil.h]) + LIBXL_LIBS="$LIBXL_LIBS -lxlutil" AC_DEFINE_UNQUOTED([WITH_LIBXL], 1, [whether libxenlight driver is enabled]) fi AM_CONDITIONAL([WITH_LIBXL], [test "$with_libxl" = "yes"]) diff --git a/po/POTFILES.in b/po/POTFILES.in index e7cb2cc..094c8e3 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -247,6 +247,7 @@ src/xenapi/xenapi_driver.c src/xenapi/xenapi_utils.c src/xenconfig/xen_common.c src/xenconfig/xen_sxpr.c +src/xenconfig/xen_xl.c src/xenconfig/xen_xm.c tests/virpolkittest.c tools/libvirt-guests.sh.in diff --git a/src/Makefile.am b/src/Makefile.am index e0e47d0..875fb5e 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1004,7 +1004,8 @@ XENCONFIG_SOURCES = \ xenconfig/xenxs_private.h \ xenconfig/xen_common.c xenconfig/xen_common.h \ xenconfig/xen_sxpr.c xenconfig/xen_sxpr.h \ - xenconfig/xen_xm.c xenconfig/xen_xm.h + xenconfig/xen_xm.c xenconfig/xen_xm.h \ + xenconfig/xen_xl.c xenconfig/xen_xl.h pkgdata_DATA = cpu/cpu_map.xml @@ -1061,6 +1062,7 @@ endif WITH_VMX if WITH_XENCONFIG noinst_LTLIBRARIES += libvirt_xenconfig.la libvirt_la_BUILT_LIBADD += libvirt_xenconfig.la +libvirt_la_LIBADD += $(LIBXL_LIBS) libvirt_xenconfig_la_CFLAGS = \ -I$(srcdir)/conf $(AM_CFLAGS) libvirt_xenconfig_la_SOURCES = $(XENCONFIG_SOURCES) diff --git a/src/libvirt_xenconfig.syms b/src/libvirt_xenconfig.syms index 6541685..3e2e5d6 100644 --- a/src/libvirt_xenconfig.syms +++ b/src/libvirt_xenconfig.syms @@ -16,6 +16,10 @@ xenParseSxprChar; xenParseSxprSound; xenParseSxprString; +#xenconfig/xen_xl.h +xenFormatXL; +xenParseXL; + # xenconfig/xen_xm.h xenFormatXM; xenParseXM; diff --git a/src/xenconfig/xen_common.c b/src/xenconfig/xen_common.c index b40a722..a2a1474 100644 --- a/src/xenconfig/xen_common.c +++ b/src/xenconfig/xen_common.c @@ -1812,7 +1812,8 @@ xenFormatVfb(virConfPtr conf, virDomainDefPtr def, int xendConfigVersion) { int hvm = STREQ(def->os.type, "hvm") ? 1 : 0; - if (def->ngraphics == 1) { + if (def->ngraphics == 1 && + def->graphics[0]->type != VIR_DOMAIN_GRAPHICS_TYPE_SPICE) { if (hvm || (xendConfigVersion < XEND_CONFIG_MIN_VERS_PVFB_NEWCONF)) { if (def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_SDL) { if (xenConfigSetInt(conf, "sdl", 1) < 0) diff --git a/src/xenconfig/xen_xl.c b/src/xenconfig/xen_xl.c new file mode 100644 index 0000000..10027c1 --- /dev/null +++ b/src/xenconfig/xen_xl.c @@ -0,0 +1,492 @@ +/* + * xen_xl.c: Xen XL parsing functions

+ * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + * + * Author: Kiarie Kahurani <davidkiarie4(a)gmail.com&gt; + */ + +#include <config.h> + +#include <libxl.h> + +#include "virconf.h" +#include "virerror.h" +#include "domain_conf.h" +#include "viralloc.h" +#include "virstring.h" +#include "virstoragefile.h" +#include "xen_xl.h" + +#define VIR_FROM_THIS VIR_FROM_NONE + +/* + * Xen provides a libxl utility library, with several useful functions, + * specifically xlu_disk_parse for parsing xl disk config strings. + * Although the libxlutil library is installed, until recently the + * corresponding header file wasn't. Use the header file if detected during + * configure, otherwise provide extern declarations for any functions used. + */ +#ifdef HAVE_LIBXLUTIL_H +# include <libxlutil.h> +#else +typedef struct XLU_Config XLU_Config; + +extern XLU_Config *xlu_cfg_init(FILE *report, + const char *report_filename); + +extern int xlu_disk_parse(XLU_Config *cfg, + int nspecs, + const char *const *specs, + libxl_device_disk *disk); +#endif + +static int +xenParseXLSpice(virConfPtr conf, virDomainDefPtr def) +{ + virDomainGraphicsDefPtr graphics = NULL; + unsigned long port; + char *listenAddr = NULL; + int val; + + if (STREQ(def->os.type, "hvm")) { + if (xenConfigGetBool(conf, "spice", &val, 0) < 0) + return -1; + + if (val) { + if (VIR_ALLOC(graphics) < 0) + return -1; + + graphics->type = VIR_DOMAIN_GRAPHICS_TYPE_SPICE; + if (xenConfigCopyStringOpt(conf, "spicehost", &listenAddr) < 0) + goto cleanup; + if (listenAddr && + virDomainGraphicsListenSetAddress(graphics, 0, listenAddr, + -1, true) < 0) { + goto cleanup; + } + VIR_FREE(listenAddr); + + if (xenConfigGetULong(conf, "spicetls_port", &port, 0) < 0) + goto cleanup; + graphics->data.spice.tlsPort = (int)port; + + if (xenConfigGetULong(conf, "spiceport", &port, 0) < 0) + goto cleanup; + + graphics->data.spice.port = (int)port; + + if (!graphics->data.spice.tlsPort && + !graphics->data.spice.port) + graphics->data.spice.autoport = 1; + + if (xenConfigGetBool(conf, "spicedisable_ticketing", &val, 0) < 0) + goto cleanup; + if (val) { + if (xenConfigCopyStringOpt(conf, "spicepasswd", + &graphics->data.spice.auth.passwd) < 0) + goto cleanup; + } + + if (xenConfigGetBool(conf, "spiceagent_mouse", + &graphics->data.spice.mousemode, 0) < 0) + goto cleanup; + if (xenConfigGetBool(conf, "spicedvagent", &val, 0) < 0) + goto cleanup; + if (val) { + if (xenConfigGetBool(conf, "spice_clipboard_sharing", + &graphics->data.spice.copypaste, + 0) < 0) + goto cleanup; + } + + if (VIR_ALLOC_N(def->graphics, 1) < 0) + goto cleanup; + def->graphics[0] = graphics; + def->ngraphics = 1; + } + } + + return 0; + + cleanup: + virDomainGraphicsDefFree(graphics); + return -1; +} + +/* + * positional parameters + * (If the <diskspec> strings are not separated by "=" + * the string is split following ',' and assigned to + * the following options in the following order) + * target,format,vdev,access + * ================================================================ + * + * The parameters below cannot be specified as positional parameters: + * + * other parameters + * devtype = <devtype> + * backendtype = <backend-type> + * parameters not taken care of + * backend = <domain-name> + * script = <script> + * direct-io-safe + * + * ================================================================ + * The parser does not take any deprecated parameters + * + * For more information refer to /xen/docs/misc/xl-disk-configuration.txt + */ +static int +xenParseXLDisk(virConfPtr conf, virDomainDefPtr def) +{ + virConfValuePtr list = virConfGetValue(conf, "disk"); + XLU_Config *xluconf; + virDomainDiskDefPtr disk; + libxl_device_disk *libxldisk; + + if (VIR_ALLOC(libxldisk) < 0) + return -1; + + if (!(xluconf = xlu_cfg_init(stderr, "command line"))) + return -1;

+ + if (list && list->type == VIR_CONF_LIST) { + list = list->list; + while (list) { + const char *disk_spec = list->str; + + if ((list->type != VIR_CONF_STRING) || (list->str == NULL)) + goto skipdisk; + + libxl_device_disk_init(libxldisk); + + if (xlu_disk_parse(xluconf, 1, &disk_spec, libxldisk))

+ goto skipdisk; + + if (!(disk = virDomainDiskDefNew())) + return -1; + + if (VIR_STRDUP(disk->dst, libxldisk->vdev) < 0) + goto fail; + + if (virDomainDiskSetSource(disk, libxldisk->pdev_path) < 0) + goto fail; + + disk->src->readonly = libxldisk->readwrite ? 0 : 1; + disk->removable = libxldisk->removable; + + if (libxldisk->is_cdrom) { + if (virDomainDiskSetDriver(disk, "qemu") < 0) + goto fail; + + virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE); + disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM; + if (!disk->src->path || STREQ(disk->src->path, "")) + disk->src->format = VIR_STORAGE_FILE_NONE; + else + disk->src->format = VIR_STORAGE_FILE_RAW; + } else { + switch (libxldisk->format) { + case LIBXL_DISK_FORMAT_QCOW: + disk->src->format = VIR_STORAGE_FILE_QCOW; + break; + + case LIBXL_DISK_FORMAT_QCOW2: + disk->src->format = VIR_STORAGE_FILE_QCOW2; + break; + + case LIBXL_DISK_FORMAT_VHD: + disk->src->format = VIR_STORAGE_FILE_VHD; + break; + + case LIBXL_DISK_FORMAT_RAW: + case LIBXL_DISK_FORMAT_UNKNOWN: + disk->src->format = VIR_STORAGE_FILE_RAW; + break; + + case LIBXL_DISK_FORMAT_EMPTY: + break; + } + + switch (libxldisk->backend) { + case LIBXL_DISK_BACKEND_QDISK: + case LIBXL_DISK_BACKEND_UNKNOWN: + if (virDomainDiskSetDriver(disk, "qemu") < 0) + goto fail; + virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE); + break; + + case LIBXL_DISK_BACKEND_TAP: + if (virDomainDiskSetDriver(disk, "tap") < 0) + goto fail; + virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE); + break; + + case LIBXL_DISK_BACKEND_PHY: + if (virDomainDiskSetDriver(disk, "phy") < 0) + goto fail; + virDomainDiskSetType(disk, VIR_STORAGE_TYPE_BLOCK); + break; + } + } + + if (STRPREFIX(libxldisk->vdev, "xvd") || !STREQ(def->os.type, "hvm")) + disk->bus = VIR_DOMAIN_DISK_BUS_XEN; + else if (STRPREFIX(libxldisk->vdev, "sd")) + disk->bus = VIR_DOMAIN_DISK_BUS_SCSI; + else + disk->bus = VIR_DOMAIN_DISK_BUS_IDE; + + if (VIR_APPEND_ELEMENT(def->disks, def->ndisks, disk) < 0) + goto fail; + + skipdisk: + list = list->next; + } + }

+ return 0; + + fail: + virDomainDiskDefFree(disk);

+ return -1; +} + + +virDomainDefPtr +xenParseXL(virConfPtr conf, virCapsPtr caps, int xendConfigVersion) +{ + virDomainDefPtr def = NULL; + + if (VIR_ALLOC(def) < 0) + return NULL; + + def->virtType = VIR_DOMAIN_VIRT_XEN; + def->id = -1; + + if (xenParseConfigCommon(conf, def, caps, xendConfigVersion) < 0) + goto cleanup; + + if (xenParseXLDisk(conf, def) < 0) + goto cleanup; + + if (xenParseXLSpice(conf, def) < 0) + goto cleanup; + + return def; + + cleanup: + virDomainDefFree(def); + return NULL; +} + + +static int +xenFormatXLDisk(virConfValuePtr list, virDomainDiskDefPtr disk) +{ + virBuffer buf = VIR_BUFFER_INITIALIZER; + virConfValuePtr val, tmp; + const char *src = virDomainDiskGetSource(disk); + int format = virDomainDiskGetFormat(disk); + const char *driver = virDomainDiskGetDriver(disk); + + /* target */ + virBufferAsprintf(&buf, "%s,", src); + /* format */ + switch (format) { + case VIR_STORAGE_FILE_RAW: + virBufferAddLit(&buf, "raw,"); + break; + case VIR_STORAGE_FILE_VHD: + virBufferAddLit(&buf, "xvhd,"); + break; + case VIR_STORAGE_FILE_QCOW: + virBufferAddLit(&buf, "qcow,"); + break; + case VIR_STORAGE_FILE_QCOW2: + virBufferAddLit(&buf, "qcow2,"); + break; + /* set default */ + default: + virBufferAddLit(&buf, "raw,"); + } + + /* device */ + virBufferAdd(&buf, disk->dst, -1); + + virBufferAddLit(&buf, ","); + + if (disk->src->readonly) + virBufferAddLit(&buf, "r,"); + else if (disk->src->shared) + virBufferAddLit(&buf, "!,"); + else + virBufferAddLit(&buf, "w,"); + if (disk->transient) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("transient disks not supported yet")); + goto cleanup; + } + + if (STREQ_NULLABLE(driver, "qemu")) + virBufferAddLit(&buf, "backendtype=qdisk"); + else if (STREQ_NULLABLE(driver, "tap")) + virBufferAddLit(&buf, "backendtype=tap"); + else if (STREQ_NULLABLE(driver, "phy")) + virBufferAddLit(&buf, "backendtype=phy"); + + if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM) + virBufferAddLit(&buf, ",devtype=cdrom"); + + if (virBufferCheckError(&buf) < 0) + goto cleanup; + + if (VIR_ALLOC(val) < 0) + goto cleanup; + + val->type = VIR_CONF_STRING; + val->str = virBufferContentAndReset(&buf); + tmp = list->list; + while (tmp && tmp->next) + tmp = tmp->next; + if (tmp) + tmp->next = val; + else + list->list = val; + return 0; + + cleanup: + virBufferFreeAndReset(&buf); + return -1; +} + + +static int +xenFormatXLDomainDisks(virConfPtr conf, virDomainDefPtr def) +{ + virConfValuePtr diskVal = NULL; + size_t i = 0; + + if (VIR_ALLOC(diskVal) < 0) + return -1; + + diskVal->type = VIR_CONF_LIST; + diskVal->list = NULL; + + for (i = 0; i < def->ndisks; i++) { + if (def->disks[i]->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY) + continue; + if (xenFormatXLDisk(diskVal, def->disks[i]) < 0) + + goto cleanup; + } + + if (diskVal->list != NULL) { + int ret = virConfSetValue(conf, "disk", diskVal); + diskVal = NULL; + if (ret < 0) + goto cleanup; + } +

+ return 0; + + cleanup: + virConfFreeValue(diskVal); + return 0;

+} + + +static int +xenFormatXLSpice(virConfPtr conf, virDomainDefPtr def) +{ + const char *listenAddr = NULL; + + if (STREQ(def->os.type, "hvm")) { + if (def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_SPICE) { + /* set others to false but may not be necessary */ + if (xenConfigSetInt(conf, "sdl", 0) < 0) + return -1; + + if (xenConfigSetInt(conf, "vnc", 0) < 0) + return -1; + + if (xenConfigSetInt(conf, "spice", 1) < 0) + return -1; + + if (xenConfigSetInt(conf, "spiceport", + def->graphics[0]->data.spice.port) < 0) + return -1; + + if (xenConfigSetInt(conf, "spicetls_port", + def->graphics[0]->data.spice.tlsPort) < 0) + return -1; + + if (def->graphics[0]->data.spice.auth.passwd) { + if (xenConfigSetInt(conf, "spicedisable_ticketing", 1) < 0) + return -1; + + if (def->graphics[0]->data.spice.auth.passwd && + xenConfigSetString(conf, "spicepasswd", + def->graphics[0]->data.spice.auth.passwd) < 0) + return -1; + } + + listenAddr = virDomainGraphicsListenGetAddress(def->graphics[0], 0); + if (listenAddr && + xenConfigSetString(conf, "spicehost", listenAddr) < 0) + return -1; + + if (xenConfigSetInt(conf, "spicemouse_mouse", + def->graphics[0]->data.spice.mousemode) < 0) + return -1; + + if (def->graphics[0]->data.spice.copypaste) { + if (xenConfigSetInt(conf, "spicedvagent", 1) < 0) + return -1; + if (xenConfigSetInt(conf, "spice_clipboard_sharing", + def->graphics[0]->data.spice.copypaste) < 0) + return -1; + } + } + } + + return 0; +} + + +virConfPtr +xenFormatXL(virDomainDefPtr def, virConnectPtr conn, int xendConfigVersion) +{ + virConfPtr conf = NULL; + + if (!(conf = virConfNew())) + goto cleanup; + + if (xenFormatConfigCommon(conf, def, conn, xendConfigVersion) < 0) + goto cleanup; + + if (xenFormatXLDomainDisks(conf, def) < 0) + goto cleanup; + + if (xenFormatXLSpice(conf, def) < 0) + goto cleanup; + + return conf; + + cleanup: + if (conf) + virConfFree(conf); + return NULL; +} diff --git a/src/xenconfig/xen_xl.h b/src/xenconfig/xen_xl.h new file mode 100644 index 0000000..536e9b7 --- /dev/null +++ b/src/xenconfig/xen_xl.h @@ -0,0 +1,33 @@ +/* + * xen_xl.h: Xen XL parsing functions + *

+ * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + * + * Author: Kiarie Kahurani&lt;davidkiarie4(a)gmail.com&gt; + */ + +#ifndef __VIR_XEN_XL_H__ +# define __VIR_XEN_XL_H__ + +# include "virconf.h" +# include "domain_conf.h" +# include "xen_common.h" + +virDomainDefPtr xenParseXL(virConfPtr conn, virCapsPtr caps, + int xendConfigVersion); +virConfPtr xenFormatXL(virDomainDefPtr def, + virConnectPtr, int xendConfigVersion); + +#endif /* __VIR_XEN_XL_H__ */