[libvirt] [PATCH 08/12] Split code for building QEMU -drive arg in separate method

To enable it to be called from multiple locations, split out the code for building the -drive arg string * src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Add qemuBuildDriveStr for building -drive arg string --- src/qemu/qemu_conf.c | 188 ++++++++++++++++++++++++++++---------------------- src/qemu/qemu_conf.h | 7 ++ 2 files changed, 112 insertions(+), 83 deletions(-) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 39d9314..27faa3f 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -1313,6 +1313,110 @@ qemuAssignNetNames(virDomainDefPtr def, return 0; } +#define QEMU_SERIAL_PARAM_ACCEPTED_CHARS \ + "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_" + +static int +qemuSafeSerialParamValue(virConnectPtr conn, + const char *value) +{ + if (strspn(value, QEMU_SERIAL_PARAM_ACCEPTED_CHARS) != strlen (value)) { + qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, + _("driver serial '%s' contains unsafe characters"), + value); + return -1; + } + + return 0; +} + + +int +qemuBuildDriveStr(virConnectPtr conn, + virDomainDiskDefPtr disk, + int bootable, + int qemuCmdFlags, + char **str) +{ + virBuffer opt = VIR_BUFFER_INITIALIZER; + const char *bus = virDomainDiskQEMUBusTypeToString(disk->bus); + int idx = virDiskNameToIndex(disk->dst); + char *optstr = NULL; + + if (idx < 0) { + qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, + _("unsupported disk type '%s'"), disk->dst); + goto error; + } + + if (disk->src) { + if (disk->type == VIR_DOMAIN_DISK_TYPE_DIR) { + /* QEMU only supports magic FAT format for now */ + if (disk->driverType && + STRNEQ(disk->driverType, "fat")) { + qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, + _("unsupported disk driver type for '%s'"), + disk->driverType); + goto error; + } + if (!disk->readonly) { + qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", + _("cannot create virtual FAT disks in read-write mode")); + goto error; + } + if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY) + virBufferVSprintf(&opt, "file=fat:floppy:%s,", disk->src); + else + virBufferVSprintf(&opt, "file=fat:%s,", disk->src); + } else { + virBufferVSprintf(&opt, "file=%s,", disk->src); + } + } + virBufferVSprintf(&opt, "if=%s", bus); + if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM) + virBufferAddLit(&opt, ",media=cdrom"); + virBufferVSprintf(&opt, ",index=%d", idx); + if (bootable && + disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) + virBufferAddLit(&opt, ",boot=on"); + if (disk->driverType && + disk->type != VIR_DOMAIN_DISK_TYPE_DIR && + qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_FORMAT) + virBufferVSprintf(&opt, ",format=%s", disk->driverType); + if (disk->serial && + (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_SERIAL)) { + if (qemuSafeSerialParamValue(conn, disk->serial) < 0) + goto error; + virBufferVSprintf(&opt, ",serial=%s", disk->serial); + } + + if (disk->cachemode) { + const char *mode = + (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_CACHE_V2) ? + qemuDiskCacheV2TypeToString(disk->cachemode) : + qemuDiskCacheV1TypeToString(disk->cachemode); + + virBufferVSprintf(&opt, ",cache=%s", mode); + } else if (disk->shared && !disk->readonly) { + virBufferAddLit(&opt, ",cache=off"); + } + + if (virBufferError(&opt)) { + virReportOOMError(conn); + goto error; + } + + *str = virBufferContentAndReset(&opt); + return 0; + +error: + optstr = virBufferContentAndReset(&opt); + VIR_FREE(optstr); + *str = NULL; + return -1; +} + + int qemuBuildNicStr(virConnectPtr conn, virDomainNetDefPtr net, @@ -1562,23 +1666,6 @@ static void qemudBuildCommandLineChrDevStr(virDomainChrDefPtr dev, } } -#define QEMU_SERIAL_PARAM_ACCEPTED_CHARS \ - "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_" - -static int -qemuSafeSerialParamValue(virConnectPtr conn, - const char *value) -{ - if (strspn(value, QEMU_SERIAL_PARAM_ACCEPTED_CHARS) != strlen (value)) { - qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, - _("driver serial '%s' contains unsafe characters"), - value); - return -1; - } - - return 0; -} - /* * Constructs a argv suitable for launching qemu with config defined * for a given virtual machine. @@ -1960,12 +2047,9 @@ int qemudBuildCommandLine(virConnectPtr conn, } for (i = 0 ; i < def->ndisks ; i++) { - virBuffer opt = VIR_BUFFER_INITIALIZER; char *optstr; int bootable = 0; virDomainDiskDefPtr disk = def->disks[i]; - int idx = virDiskNameToIndex(disk->dst); - const char *bus = virDomainDiskQEMUBusTypeToString(disk->bus); if (disk->bus == VIR_DOMAIN_DISK_BUS_USB) { if (disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) { @@ -1980,12 +2064,6 @@ int qemudBuildCommandLine(virConnectPtr conn, ADD_ARG_SPACE; - if (idx < 0) { - qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, - _("unsupported disk type '%s'"), disk->dst); - goto error; - } - switch (disk->device) { case VIR_DOMAIN_DISK_DEVICE_CDROM: bootable = bootCD; @@ -2001,64 +2079,8 @@ int qemudBuildCommandLine(virConnectPtr conn, break; } - if (disk->src) { - if (disk->type == VIR_DOMAIN_DISK_TYPE_DIR) { - /* QEMU only supports magic FAT format for now */ - if (disk->driverType && - STRNEQ(disk->driverType, "fat")) { - qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, - _("unsupported disk driver type for '%s'"), - disk->driverType); - goto error; - } - if (!disk->readonly) { - qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", - _("cannot create virtual FAT disks in read-write mode")); - goto error; - } - if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY) - virBufferVSprintf(&opt, "file=fat:floppy:%s,", disk->src); - else - virBufferVSprintf(&opt, "file=fat:%s,", disk->src); - } else { - virBufferVSprintf(&opt, "file=%s,", disk->src); - } - } - virBufferVSprintf(&opt, "if=%s", bus); - if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM) - virBufferAddLit(&opt, ",media=cdrom"); - virBufferVSprintf(&opt, ",index=%d", idx); - if (bootable && - disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) - virBufferAddLit(&opt, ",boot=on"); - if (disk->driverType && - disk->type != VIR_DOMAIN_DISK_TYPE_DIR && - qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_FORMAT) - virBufferVSprintf(&opt, ",format=%s", disk->driverType); - if (disk->serial && - (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_SERIAL)) { - if (qemuSafeSerialParamValue(conn, disk->serial) < 0) - goto error; - virBufferVSprintf(&opt, ",serial=%s", disk->serial); - } - - if (disk->cachemode) { - const char *mode = - (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_CACHE_V2) ? - qemuDiskCacheV2TypeToString(disk->cachemode) : - qemuDiskCacheV1TypeToString(disk->cachemode); - - virBufferVSprintf(&opt, ",cache=%s", mode); - } else if (disk->shared && !disk->readonly) { - virBufferAddLit(&opt, ",cache=off"); - } - - if (virBufferError(&opt)) { - virReportOOMError(conn); + if (qemuBuildDriveStr(conn, disk, bootable, qemuCmdFlags, &optstr) < 0) goto error; - } - - optstr = virBufferContentAndReset(&opt); if ((qargv[qargc++] = strdup("-drive")) == NULL) { VIR_FREE(optstr); diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h index 248677a..cd59d4c 100644 --- a/src/qemu/qemu_conf.h +++ b/src/qemu/qemu_conf.h @@ -191,6 +191,13 @@ int qemuBuildNicStr (virConnectPtr conn, int vlan, char **str); + +int qemuBuildDriveStr (virConnectPtr conn, + virDomainDiskDefPtr disk, + int bootable, + int qemuCmdFlags, + char **str); + int qemudNetworkIfaceConnect (virConnectPtr conn, struct qemud_driver *driver, virDomainNetDefPtr net, -- 1.6.5.2