mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2025-01-22 12:35:17 +00:00
src/xenxs: Refactor code parsing xm disk config
introduce function xenParseXMDisk(virConfPtr conf, ........); which parses xm disk config instead Signed-off-by: Kiarie Kahurani <davidkiarie4@gmail.com>
This commit is contained in:
Kiarie Kahurani
Jim Fehlig
parent
fc953fcfc0
commit
70328f6cc8
@ -504,6 +504,204 @@ xenParseXMCPUFeatures(virConfPtr conf, virDomainDefPtr def)
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}
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static int
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xenParseXMDisk(virConfPtr conf, virDomainDefPtr def, int xendConfigVersion)
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{
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const char *str = NULL;
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virDomainDiskDefPtr disk = NULL;
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int hvm = STREQ(def->os.type, "hvm");
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virConfValuePtr list = virConfGetValue(conf, "disk");
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if (list && list->type == VIR_CONF_LIST) {
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list = list->list;
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while (list) {
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char *head;
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char *offset;
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char *tmp;
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const char *src;
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if ((list->type != VIR_CONF_STRING) || (list->str == NULL))
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goto skipdisk;
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head = list->str;
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if (!(disk = virDomainDiskDefNew()))
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return -1;
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/*
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* Disks have 3 components, SOURCE,DEST-DEVICE,MODE
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* eg, phy:/dev/HostVG/XenGuest1,xvda,w
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* The SOURCE is usually prefixed with a driver type,
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* and optionally driver sub-type
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* The DEST-DEVICE is optionally post-fixed with disk type
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*/
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/* Extract the source file path*/
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if (!(offset = strchr(head, ',')))
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goto skipdisk;
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if (offset == head) {
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/* No source file given, eg CDROM with no media */
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ignore_value(virDomainDiskSetSource(disk, NULL));
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} else {
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if (VIR_STRNDUP(tmp, head, offset - head) < 0)
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goto cleanup;
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if (virDomainDiskSetSource(disk, tmp) < 0) {
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VIR_FREE(tmp);
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goto cleanup;
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}
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VIR_FREE(tmp);
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}
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head = offset + 1;
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/* Remove legacy ioemu: junk */
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if (STRPREFIX(head, "ioemu:"))
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head = head + 6;
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/* Extract the dest device name */
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if (!(offset = strchr(head, ',')))
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goto skipdisk;
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if (VIR_ALLOC_N(disk->dst, (offset - head) + 1) < 0)
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goto cleanup;
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if (virStrncpy(disk->dst, head, offset - head,
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(offset - head) + 1) == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Dest file %s too big for destination"), head);
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goto cleanup;
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}
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head = offset + 1;
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/* Extract source driver type */
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src = virDomainDiskGetSource(disk);
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if (src) {
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size_t len;
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/* The main type phy:, file:, tap: ... */
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if ((tmp = strchr(src, ':')) != NULL) {
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len = tmp - src;
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if (VIR_STRNDUP(tmp, src, len) < 0)
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goto cleanup;
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if (virDomainDiskSetDriver(disk, tmp) < 0) {
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VIR_FREE(tmp);
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goto cleanup;
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}
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VIR_FREE(tmp);
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/* Strip the prefix we found off the source file name */
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if (virDomainDiskSetSource(disk, src + len + 1) < 0)
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goto cleanup;
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src = virDomainDiskGetSource(disk);
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}
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/* And the sub-type for tap:XXX: type */
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if (STREQ_NULLABLE(virDomainDiskGetDriver(disk), "tap")) {
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char *driverType;
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if (!(tmp = strchr(src, ':')))
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goto skipdisk;
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len = tmp - src;
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if (VIR_STRNDUP(driverType, src, len) < 0)
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goto cleanup;
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if (STREQ(driverType, "aio"))
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virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_RAW);
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else
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virDomainDiskSetFormat(disk,
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virStorageFileFormatTypeFromString(driverType));
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VIR_FREE(driverType);
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if (virDomainDiskGetFormat(disk) <= 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unknown driver type %s"),
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src);
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goto cleanup;
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}
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/* Strip the prefix we found off the source file name */
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if (virDomainDiskSetSource(disk, src + len + 1) < 0)
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goto cleanup;
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src = virDomainDiskGetSource(disk);
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}
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}
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/* No source, or driver name, so fix to phy: */
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if (!virDomainDiskGetDriver(disk) &&
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virDomainDiskSetDriver(disk, "phy") < 0)
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goto cleanup;
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/* phy: type indicates a block device */
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virDomainDiskSetType(disk,
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STREQ(virDomainDiskGetDriver(disk), "phy") ?
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VIR_STORAGE_TYPE_BLOCK :
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VIR_STORAGE_TYPE_FILE);
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/* Check for a :cdrom/:disk postfix */
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disk->device = VIR_DOMAIN_DISK_DEVICE_DISK;
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if ((tmp = strchr(disk->dst, ':')) != NULL) {
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if (STREQ(tmp, ":cdrom"))
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disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
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tmp[0] = '\0';
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}
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if (STRPREFIX(disk->dst, "xvd") || !hvm) {
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disk->bus = VIR_DOMAIN_DISK_BUS_XEN;
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} else if (STRPREFIX(disk->dst, "sd")) {
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disk->bus = VIR_DOMAIN_DISK_BUS_SCSI;
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} else {
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disk->bus = VIR_DOMAIN_DISK_BUS_IDE;
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}
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if (STREQ(head, "r") ||
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STREQ(head, "ro"))
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disk->src->readonly = true;
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else if ((STREQ(head, "w!")) ||
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(STREQ(head, "!")))
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disk->src->shared = true;
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/* Maintain list in sorted order according to target device name */
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if (VIR_APPEND_ELEMENT(def->disks, def->ndisks, disk) < 0)
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goto cleanup;
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skipdisk:
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list = list->next;
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virDomainDiskDefFree(disk);
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}
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}
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if (hvm && xendConfigVersion == XEND_CONFIG_VERSION_3_0_2) {
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if (xenXMConfigGetString(conf, "cdrom", &str, NULL) < 0)
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goto cleanup;
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if (str) {
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if (!(disk = virDomainDiskDefNew()))
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goto cleanup;
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virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
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disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
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if (virDomainDiskSetDriver(disk, "file") < 0)
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goto cleanup;
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if (virDomainDiskSetSource(disk, str) < 0)
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goto cleanup;
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if (VIR_STRDUP(disk->dst, "hdc") < 0)
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goto cleanup;
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disk->bus = VIR_DOMAIN_DISK_BUS_IDE;
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disk->src->readonly = true;
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if (VIR_APPEND_ELEMENT(def->disks, def->ndisks, disk) < 0)
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goto cleanup;
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}
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}
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return 0;
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cleanup:
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virDomainDiskDefFree(disk);
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return -1;
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}
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#define MAX_VFB 1024
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/*
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@ -519,7 +717,6 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
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int val;
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virConfValuePtr list;
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virDomainDefPtr def = NULL;
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virDomainDiskDefPtr disk = NULL;
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virDomainNetDefPtr net = NULL;
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virDomainGraphicsDefPtr graphics = NULL;
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size_t i;
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@ -630,186 +827,11 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
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if (xenParseXMTimeOffset(conf, def, xendConfigVersion) < 0)
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goto cleanup;
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if (xenXMConfigCopyStringOpt(conf, "device_model", &def->emulator) < 0)
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if (xenParseXMDisk(conf, def, xendConfigVersion) < 0)
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goto cleanup;
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list = virConfGetValue(conf, "disk");
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if (list && list->type == VIR_CONF_LIST) {
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list = list->list;
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while (list) {
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char *head;
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char *offset;
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char *tmp;
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const char *src;
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if ((list->type != VIR_CONF_STRING) || (list->str == NULL))
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goto skipdisk;
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head = list->str;
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if (!(disk = virDomainDiskDefNew()))
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goto cleanup;
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/*
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* Disks have 3 components, SOURCE,DEST-DEVICE,MODE
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* eg, phy:/dev/HostVG/XenGuest1,xvda,w
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* The SOURCE is usually prefixed with a driver type,
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* and optionally driver sub-type
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* The DEST-DEVICE is optionally post-fixed with disk type
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*/
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/* Extract the source file path*/
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if (!(offset = strchr(head, ',')))
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goto skipdisk;
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if (offset == head) {
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/* No source file given, eg CDROM with no media */
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ignore_value(virDomainDiskSetSource(disk, NULL));
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} else {
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if (VIR_STRNDUP(tmp, head, offset - head) < 0)
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goto cleanup;
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if (virDomainDiskSetSource(disk, tmp) < 0) {
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VIR_FREE(tmp);
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goto cleanup;
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}
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VIR_FREE(tmp);
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}
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head = offset + 1;
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/* Remove legacy ioemu: junk */
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if (STRPREFIX(head, "ioemu:"))
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head = head + 6;
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/* Extract the dest device name */
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if (!(offset = strchr(head, ',')))
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goto skipdisk;
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if (VIR_ALLOC_N(disk->dst, (offset - head) + 1) < 0)
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goto cleanup;
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if (virStrncpy(disk->dst, head, offset - head,
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(offset - head) + 1) == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Dest file %s too big for destination"), head);
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goto cleanup;
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}
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head = offset + 1;
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/* Extract source driver type */
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src = virDomainDiskGetSource(disk);
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if (src) {
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size_t len;
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/* The main type phy:, file:, tap: ... */
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if ((tmp = strchr(src, ':')) != NULL) {
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len = tmp - src;
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if (VIR_STRNDUP(tmp, src, len) < 0)
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goto cleanup;
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if (virDomainDiskSetDriver(disk, tmp) < 0) {
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VIR_FREE(tmp);
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goto cleanup;
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}
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VIR_FREE(tmp);
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/* Strip the prefix we found off the source file name */
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if (virDomainDiskSetSource(disk, src + len + 1) < 0)
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goto cleanup;
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src = virDomainDiskGetSource(disk);
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}
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/* And the sub-type for tap:XXX: type */
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if (STREQ_NULLABLE(virDomainDiskGetDriver(disk), "tap")) {
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char *driverType;
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if (!(tmp = strchr(src, ':')))
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goto skipdisk;
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len = tmp - src;
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if (VIR_STRNDUP(driverType, src, len) < 0)
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goto cleanup;
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if (STREQ(driverType, "aio"))
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virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_RAW);
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else
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virDomainDiskSetFormat(disk,
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virStorageFileFormatTypeFromString(driverType));
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VIR_FREE(driverType);
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if (virDomainDiskGetFormat(disk) <= 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unknown driver type %s"),
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src);
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goto cleanup;
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}
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/* Strip the prefix we found off the source file name */
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if (virDomainDiskSetSource(disk, src + len + 1) < 0)
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goto cleanup;
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src = virDomainDiskGetSource(disk);
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}
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}
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/* No source, or driver name, so fix to phy: */
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if (!virDomainDiskGetDriver(disk) &&
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virDomainDiskSetDriver(disk, "phy") < 0)
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goto cleanup;
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/* phy: type indicates a block device */
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virDomainDiskSetType(disk,
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STREQ(virDomainDiskGetDriver(disk), "phy") ?
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VIR_STORAGE_TYPE_BLOCK :
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VIR_STORAGE_TYPE_FILE);
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/* Check for a :cdrom/:disk postfix */
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disk->device = VIR_DOMAIN_DISK_DEVICE_DISK;
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if ((tmp = strchr(disk->dst, ':')) != NULL) {
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if (STREQ(tmp, ":cdrom"))
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disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
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tmp[0] = '\0';
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}
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if (STRPREFIX(disk->dst, "xvd") || !hvm) {
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disk->bus = VIR_DOMAIN_DISK_BUS_XEN;
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} else if (STRPREFIX(disk->dst, "sd")) {
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disk->bus = VIR_DOMAIN_DISK_BUS_SCSI;
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} else {
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disk->bus = VIR_DOMAIN_DISK_BUS_IDE;
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}
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if (STREQ(head, "r") ||
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STREQ(head, "ro"))
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disk->src->readonly = true;
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else if ((STREQ(head, "w!")) ||
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(STREQ(head, "!")))
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disk->src->shared = true;
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/* Maintain list in sorted order according to target device name */
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if (VIR_APPEND_ELEMENT(def->disks, def->ndisks, disk) < 0)
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goto cleanup;
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skipdisk:
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list = list->next;
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virDomainDiskDefFree(disk);
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}
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}
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if (hvm && xendConfigVersion == XEND_CONFIG_VERSION_3_0_2) {
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if (xenXMConfigGetString(conf, "cdrom", &str, NULL) < 0)
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goto cleanup;
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if (str) {
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if (!(disk = virDomainDiskDefNew()))
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goto cleanup;
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virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
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disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
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if (virDomainDiskSetDriver(disk, "file") < 0)
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goto cleanup;
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if (virDomainDiskSetSource(disk, str) < 0)
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goto cleanup;
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if (VIR_STRDUP(disk->dst, "hdc") < 0)
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goto cleanup;
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disk->bus = VIR_DOMAIN_DISK_BUS_IDE;
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disk->src->readonly = true;
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if (VIR_APPEND_ELEMENT(def->disks, def->ndisks, disk) < 0)
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goto cleanup;
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}
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}
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if (xenXMConfigCopyStringOpt(conf, "device_model", &def->emulator) < 0)
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goto cleanup;
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list = virConfGetValue(conf, "vif");
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if (list && list->type == VIR_CONF_LIST) {
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@ -1221,7 +1243,6 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
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cleanup:
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virDomainGraphicsDefFree(graphics);
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virDomainNetDefFree(net);
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virDomainDiskDefFree(disk);
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virDomainDefFree(def);
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VIR_FREE(script);
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VIR_FREE(listenAddr);
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