mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2025-01-12 07:42:56 +00:00
LXC: Create host devices for container on host side
Otherwise the container will fail to start if we enable user namespace, since there is no rights to do mknod in uninit user namespace. Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
This commit is contained in:
Gao feng
Eric Blake
parent
4f41a8e5b2
commit
f87be04fd8
@ -1367,72 +1367,6 @@ static int lxcContainerMountAllFS(virDomainDefPtr vmDef,
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}
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static int lxcContainerSetupHostdevSubsysUSB(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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int ret = -1;
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char *src = NULL;
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char *dstdir = NULL;
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char *dstfile = NULL;
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struct stat sb;
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mode_t mode;
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if (virAsprintf(&dstdir, USB_DEVFS "/%03d",
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def->source.subsys.u.usb.bus) < 0)
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goto cleanup;
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if (virAsprintf(&dstfile, "%s/%03d",
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dstdir,
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def->source.subsys.u.usb.device) < 0)
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goto cleanup;
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if (virAsprintf(&src, "/.oldroot/%s", dstfile) < 0)
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goto cleanup;
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if (stat(src, &sb) < 0) {
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virReportSystemError(errno,
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_("Unable to access %s"), src);
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goto cleanup;
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}
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if (!S_ISCHR(sb.st_mode)) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("USB source %s was not a character device"),
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src);
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goto cleanup;
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}
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mode = 0700 | S_IFCHR;
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if (virFileMakePath(dstdir) < 0) {
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virReportSystemError(errno,
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_("Unable to create %s"), dstdir);
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goto cleanup;
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}
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VIR_DEBUG("Creating dev %s (%d,%d)",
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dstfile, major(sb.st_rdev), minor(sb.st_rdev));
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if (mknod(dstfile, mode, sb.st_rdev) < 0) {
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virReportSystemError(errno,
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_("Unable to create device %s"),
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dstfile);
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goto cleanup;
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}
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if (virSecurityManagerSetHostdevLabel(securityDriver, vmDef, def, NULL) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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VIR_FREE(src);
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VIR_FREE(dstfile);
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VIR_FREE(dstdir);
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return ret;
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}
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int lxcContainerSetupHostdevCapsMakePath(const char *dev)
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{
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int ret = -1;
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@ -1459,199 +1393,6 @@ cleanup:
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}
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static int lxcContainerSetupHostdevCapsStorage(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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char *src = NULL;
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int ret = -1;
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struct stat sb;
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mode_t mode;
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char *dev = def->source.caps.u.storage.block;
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if (dev == NULL) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("Missing storage host block path"));
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goto cleanup;
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}
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if (virAsprintf(&src, "/.oldroot/%s", dev) < 0)
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goto cleanup;
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if (stat(src, &sb) < 0) {
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virReportSystemError(errno,
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_("Unable to access %s"),
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src);
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goto cleanup;
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}
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if (!S_ISBLK(sb.st_mode)) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Storage source %s must be a block device"),
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dev);
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goto cleanup;
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}
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if (lxcContainerSetupHostdevCapsMakePath(dev) < 0) {
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virReportError(errno,
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_("Failed to create directory for device %s"),
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dev);
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goto cleanup;
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}
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mode = 0700 | S_IFBLK;
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VIR_DEBUG("Creating dev %s (%d,%d)", dev,
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major(sb.st_rdev), minor(sb.st_rdev));
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if (mknod(dev, mode, sb.st_rdev) < 0) {
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virReportSystemError(errno,
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_("Unable to create device %s"),
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dev);
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goto cleanup;
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}
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if (virSecurityManagerSetHostdevLabel(securityDriver, vmDef, def, NULL) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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VIR_FREE(src);
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return ret;
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}
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static int lxcContainerSetupHostdevCapsMisc(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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char *src = NULL;
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int ret = -1;
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struct stat sb;
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mode_t mode;
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char *dev = def->source.caps.u.misc.chardev;
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if (dev == NULL) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("Missing storage host block path"));
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goto cleanup;
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}
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if (virAsprintf(&src, "/.oldroot/%s", dev) < 0)
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goto cleanup;
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if (stat(src, &sb) < 0) {
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virReportSystemError(errno,
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_("Unable to access %s"),
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src);
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goto cleanup;
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}
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if (!S_ISCHR(sb.st_mode)) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Storage source %s must be a character device"),
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dev);
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goto cleanup;
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}
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if (lxcContainerSetupHostdevCapsMakePath(dev) < 0) {
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virReportError(errno,
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_("Failed to create directory for device %s"),
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dev);
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goto cleanup;
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}
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mode = 0700 | S_IFCHR;
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VIR_DEBUG("Creating dev %s (%d,%d)", dev,
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major(sb.st_rdev), minor(sb.st_rdev));
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if (mknod(dev, mode, sb.st_rdev) < 0) {
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virReportSystemError(errno,
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_("Unable to create device %s"),
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dev);
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goto cleanup;
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}
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if (virSecurityManagerSetHostdevLabel(securityDriver, vmDef, def, NULL) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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VIR_FREE(src);
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return ret;
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}
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static int lxcContainerSetupHostdevSubsys(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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switch (def->source.subsys.type) {
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case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
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return lxcContainerSetupHostdevSubsysUSB(vmDef, def, securityDriver);
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default:
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Unsupported host device mode %s"),
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virDomainHostdevSubsysTypeToString(def->source.subsys.type));
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return -1;
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}
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}
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static int lxcContainerSetupHostdevCaps(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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switch (def->source.subsys.type) {
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case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_STORAGE:
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return lxcContainerSetupHostdevCapsStorage(vmDef, def, securityDriver);
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case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_MISC:
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return lxcContainerSetupHostdevCapsMisc(vmDef, def, securityDriver);
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case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_NET:
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return 0; // case is handled in virLXCControllerMoveInterfaces
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default:
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Unsupported host device mode %s"),
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virDomainHostdevCapsTypeToString(def->source.subsys.type));
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return -1;
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}
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}
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static int lxcContainerSetupAllHostdevs(virDomainDefPtr vmDef,
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virSecurityManagerPtr securityDriver)
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{
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size_t i;
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VIR_DEBUG("Setting up hostdevs");
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for (i = 0; i < vmDef->nhostdevs; i++) {
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virDomainHostdevDefPtr def = vmDef->hostdevs[i];
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switch (def->mode) {
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case VIR_DOMAIN_HOSTDEV_MODE_SUBSYS:
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if (lxcContainerSetupHostdevSubsys(vmDef, def, securityDriver) < 0)
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return -1;
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break;
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case VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES:
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if (lxcContainerSetupHostdevCaps(vmDef, def, securityDriver) < 0)
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return -1;
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break;
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default:
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Unsupported host device mode %s"),
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virDomainHostdevModeTypeToString(def->mode));
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return -1;
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}
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}
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VIR_DEBUG("Setup all hostdevs");
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return 0;
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}
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/* Got a FS mapped to /, we're going the pivot_root
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* approach to do a better-chroot-than-chroot
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* this is based on this thread http://lkml.org/lkml/2008/3/5/29
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@ -1745,10 +1486,6 @@ static int lxcContainerSetupPivotRoot(virDomainDefPtr vmDef,
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if (lxcContainerMountAllFS(vmDef, sec_mount_options) < 0)
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goto cleanup;
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/* Sets up any extra host devices from guest config */
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if (lxcContainerSetupAllHostdevs(vmDef, securityDriver) < 0)
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goto cleanup;
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/* Gets rid of all remaining mounts from host OS, including /.oldroot itself */
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if (lxcContainerUnmountSubtree("/.oldroot", true) < 0)
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goto cleanup;
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@ -1288,6 +1288,316 @@ cleanup:
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}
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static int
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virLXCControllerSetupHostdevSubsysUSB(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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int ret = -1;
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char *src = NULL;
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char *dstdir = NULL;
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char *dstfile = NULL;
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char *vroot = NULL;
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struct stat sb;
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mode_t mode;
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if (virAsprintf(&src, USB_DEVFS "/%03d/%03d",
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def->source.subsys.u.usb.bus,
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def->source.subsys.u.usb.device) < 0)
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goto cleanup;
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if (virAsprintf(&vroot, "/%s/%s.dev/bus/usb/",
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LXC_STATE_DIR, vmDef->name) < 0)
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goto cleanup;
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if (virAsprintf(&dstdir, "%s/%03d/", vroot,
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def->source.subsys.u.usb.bus) < 0)
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goto cleanup;
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if (virAsprintf(&dstfile, "%s/%03d", dstdir,
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def->source.subsys.u.usb.device) < 0)
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goto cleanup;
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if (stat(src, &sb) < 0) {
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virReportSystemError(errno,
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_("Unable to access %s"), src);
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goto cleanup;
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}
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if (!S_ISCHR(sb.st_mode)) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("USB source %s was not a character device"),
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src);
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goto cleanup;
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}
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mode = 0700 | S_IFCHR;
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if (virFileMakePath(dstdir) < 0) {
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virReportSystemError(errno,
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_("Unable to create %s"), dstdir);
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goto cleanup;
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}
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VIR_DEBUG("Creating dev %s (%d,%d)",
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dstfile, major(sb.st_rdev), minor(sb.st_rdev));
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if (mknod(dstfile, mode, sb.st_rdev) < 0) {
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virReportSystemError(errno,
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_("Unable to create device %s"),
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dstfile);
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goto cleanup;
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}
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if (virSecurityManagerSetHostdevLabel(securityDriver,
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vmDef, def, vroot) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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VIR_FREE(src);
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VIR_FREE(dstfile);
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VIR_FREE(dstdir);
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VIR_FREE(vroot);
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return ret;
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}
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static int
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virLXCControllerSetupHostdevCapsStorage(virDomainDefPtr vmDef,
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
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{
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char *dst = NULL;
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char *path = NULL;
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int len = 0;
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int ret = -1;
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struct stat sb;
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mode_t mode;
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char *dev = def->source.caps.u.storage.block;
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if (dev == NULL) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("Missing storage host block path"));
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goto cleanup;
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}
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if (VIR_STRDUP(path, dev) < 0)
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goto cleanup;
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while (*(path + len) == '/')
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len++;
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if (virAsprintf(&dst, "/%s/%s.dev/%s",
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LXC_STATE_DIR, vmDef->name,
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strchr(path + len, '/')) < 0)
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goto cleanup;
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if (stat(dev, &sb) < 0) {
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virReportSystemError(errno,
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_("Unable to access %s"),
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dev);
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goto cleanup;
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}
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if (!S_ISBLK(sb.st_mode)) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Storage source %s must be a block device"),
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dev);
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goto cleanup;
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}
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if (lxcContainerSetupHostdevCapsMakePath(dst) < 0) {
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virReportError(errno,
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_("Failed to create directory for device %s"),
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dev);
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goto cleanup;
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}
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mode = 0700 | S_IFBLK;
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VIR_DEBUG("Creating dev %s (%d,%d)", dst,
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major(sb.st_rdev), minor(sb.st_rdev));
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if (mknod(dst, mode, sb.st_rdev) < 0) {
|
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virReportSystemError(errno,
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_("Unable to create device %s"),
|
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dst);
|
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goto cleanup;
|
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}
|
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|
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def->source.caps.u.storage.block = dst;
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if (virSecurityManagerSetHostdevLabel(securityDriver, vmDef, def, NULL) < 0)
|
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goto cleanup;
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|
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ret = 0;
|
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|
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cleanup:
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def->source.caps.u.storage.block = dev;
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VIR_FREE(dst);
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VIR_FREE(path);
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return ret;
|
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}
|
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|
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|
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static int
|
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virLXCControllerSetupHostdevCapsMisc(virDomainDefPtr vmDef,
|
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virDomainHostdevDefPtr def,
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virSecurityManagerPtr securityDriver)
|
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{
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char *dst = NULL;
|
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char *path = NULL;
|
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int len = 0;
|
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int ret = -1;
|
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struct stat sb;
|
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mode_t mode;
|
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char *dev = def->source.caps.u.misc.chardev;
|
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|
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if (dev == NULL) {
|
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
|
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_("Missing storage host block path"));
|
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goto cleanup;
|
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}
|
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|
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if (VIR_STRDUP(path, dev) < 0)
|
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goto cleanup;
|
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|
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while (*(path + len) == '/')
|
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len++;
|
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|
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if (virAsprintf(&dst, "/%s/%s.dev/%s",
|
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LXC_STATE_DIR, vmDef->name,
|
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strchr(path + len, '/')) < 0)
|
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goto cleanup;
|
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|
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if (stat(dev, &sb) < 0) {
|
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virReportSystemError(errno,
|
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_("Unable to access %s"),
|
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dev);
|
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goto cleanup;
|
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}
|
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|
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if (!S_ISCHR(sb.st_mode)) {
|
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
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_("Storage source %s must be a character device"),
|
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dev);
|
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goto cleanup;
|
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}
|
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|
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if (lxcContainerSetupHostdevCapsMakePath(dst) < 0) {
|
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virReportError(errno,
|
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_("Failed to create directory for device %s"),
|
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dst);
|
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goto cleanup;
|
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}
|
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|
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mode = 0700 | S_IFCHR;
|
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|
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VIR_DEBUG("Creating dev %s (%d,%d)", dst,
|
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major(sb.st_rdev), minor(sb.st_rdev));
|
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if (mknod(dst, mode, sb.st_rdev) < 0) {
|
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virReportSystemError(errno,
|
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_("Unable to create device %s"),
|
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dev);
|
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goto cleanup;
|
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}
|
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|
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def->source.caps.u.misc.chardev = dst;
|
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if (virSecurityManagerSetHostdevLabel(securityDriver, vmDef, def, NULL) < 0)
|
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goto cleanup;
|
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|
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ret = 0;
|
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|
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cleanup:
|
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def->source.caps.u.misc.chardev = dev;
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VIR_FREE(dst);
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VIR_FREE(path);
|
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return ret;
|
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}
|
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|
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static int
|
||||
virLXCControllerSetupHostdevSubsys(virDomainDefPtr vmDef,
|
||||
virDomainHostdevDefPtr def,
|
||||
virSecurityManagerPtr securityDriver)
|
||||
{
|
||||
switch (def->source.subsys.type) {
|
||||
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
|
||||
return virLXCControllerSetupHostdevSubsysUSB(vmDef,
|
||||
def,
|
||||
securityDriver);
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device mode %s"),
|
||||
virDomainHostdevSubsysTypeToString(def->source.subsys.type));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
virLXCControllerSetupHostdevCaps(virDomainDefPtr vmDef,
|
||||
virDomainHostdevDefPtr def,
|
||||
virSecurityManagerPtr securityDriver)
|
||||
{
|
||||
switch (def->source.subsys.type) {
|
||||
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_STORAGE:
|
||||
return virLXCControllerSetupHostdevCapsStorage(vmDef,
|
||||
def,
|
||||
securityDriver);
|
||||
|
||||
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_MISC:
|
||||
return virLXCControllerSetupHostdevCapsMisc(vmDef,
|
||||
def,
|
||||
securityDriver);
|
||||
|
||||
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_NET:
|
||||
return 0; // case is handled in virLXCControllerMoveInterfaces
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device mode %s"),
|
||||
virDomainHostdevCapsTypeToString(def->source.subsys.type));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
virLXCControllerSetupAllHostdevs(virLXCControllerPtr ctrl)
|
||||
{
|
||||
size_t i;
|
||||
virDomainDefPtr vmDef = ctrl->def;
|
||||
virSecurityManagerPtr securityDriver = ctrl->securityManager;
|
||||
VIR_DEBUG("Setting up hostdevs");
|
||||
|
||||
for (i = 0; i < vmDef->nhostdevs; i++) {
|
||||
virDomainHostdevDefPtr def = vmDef->hostdevs[i];
|
||||
switch (def->mode) {
|
||||
case VIR_DOMAIN_HOSTDEV_MODE_SUBSYS:
|
||||
if (virLXCControllerSetupHostdevSubsys(vmDef,
|
||||
def,
|
||||
securityDriver) < 0)
|
||||
return -1;
|
||||
break;
|
||||
case VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES:
|
||||
if (virLXCControllerSetupHostdevCaps(vmDef,
|
||||
def,
|
||||
securityDriver) < 0)
|
||||
return -1;
|
||||
break;
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device mode %s"),
|
||||
virDomainHostdevModeTypeToString(def->mode));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
VIR_DEBUG("Setup all hostdevs");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int virLXCControllerSetupDisk(virLXCControllerPtr ctrl,
|
||||
virDomainDiskDefPtr def,
|
||||
virSecurityManagerPtr securityDriver)
|
||||
@ -1800,6 +2110,9 @@ virLXCControllerRun(virLXCControllerPtr ctrl)
|
||||
if (virLXCControllerSetupAllDisks(ctrl) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (virLXCControllerSetupAllHostdevs(ctrl) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (virLXCControllerSetupFuse(ctrl) < 0)
|
||||
goto cleanup;
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user