Re: [libvirt] [PATCH 1/1] Add trigger of host rescan

The scsi host code does not currently rescan for new LUs when refreshing a pool. This patch causes a scan for new LUs on all targets. It does not cause a LIP.

static int +virStorageBackendSCSIStartPool(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool ATTRIBUTE_UNUSED) +{ + int retval = 0; + + return retval; +} + + +static int +virStorageBackendSCSIStopPool(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool ATTRIBUTE_UNUSED) +{ + int retval = 0; + + return retval; +}

+ if (virAsprintf(&path, "/sys/class/scsi_host/host%u/scan", host) < 0) { + virReportOOMError(conn); + retval = -1; + goto out; + } + + VIR_DEBUG(_("Scan trigger path is '%s'"), path); + + fd = open(path, O_WRONLY); + + if (fd < 0) { + virReportSystemError(conn, errno, + _("Could not open '%s' to trigger host scan"), + path); + retval = -1; + goto cleanup; + } + + if (write(fd, + LINUX_SYSFS_SCSI_HOST_SCAN_STRING, + sizeof(LINUX_SYSFS_SCSI_HOST_SCAN_STRING)) < 0) { + + virReportSystemError(conn, errno, + _("Write to '%s' to trigger host scan failed"), + path); + retval = -1; + goto cleanup; + } + + goto out;

+cleanup: + VIR_FREE(path); + +out: + VIR_DEBUG(_("Rescan of host %d complete"), host); + return retval; +}