DriveInfo *drive_init(QemuOpts *opts, void *opaque, int *fatal_error) { const char *buf; const char *file = NULL; char devname[128]; const char *serial; const char *mediastr = ""; BlockInterfaceType type; enum { MEDIA_DISK, MEDIA_CDROM } media; int bus_id, unit_id; int cyls, heads, secs, translation; BlockDriver *drv = NULL; QEMUMachine *machine = opaque; int max_devs; int index; int cache; int aio = 0; int bdrv_flags, onerror; const char *devaddr; DriveInfo *dinfo; int snapshot = 0; *fatal_error = 1; translation = BIOS_ATA_TRANSLATION_AUTO; cache = 1; if (machine && machine->use_scsi) { type = IF_SCSI; max_devs = MAX_SCSI_DEVS; pstrcpy(devname, sizeof(devname), "scsi"); } else { type = IF_IDE; max_devs = MAX_IDE_DEVS; pstrcpy(devname, sizeof(devname), "ide"); } media = MEDIA_DISK; /* extract parameters */ bus_id = qemu_opt_get_number(opts, "bus", 0); unit_id = qemu_opt_get_number(opts, "unit", -1); index = qemu_opt_get_number(opts, "index", -1); cyls = qemu_opt_get_number(opts, "cyls", 0); heads = qemu_opt_get_number(opts, "heads", 0); secs = qemu_opt_get_number(opts, "secs", 0); snapshot = qemu_opt_get_bool(opts, "snapshot", 0); file = qemu_opt_get(opts, "file"); serial = qemu_opt_get(opts, "serial"); if ((buf = qemu_opt_get(opts, "if")) != NULL) { pstrcpy(devname, sizeof(devname), buf); if (!strcmp(buf, "ide")) { type = IF_IDE; max_devs = MAX_IDE_DEVS; } else if (!strcmp(buf, "scsi")) { type = IF_SCSI; max_devs = MAX_SCSI_DEVS; } else if (!strcmp(buf, "floppy")) { type = IF_FLOPPY; max_devs = 0; } else if (!strcmp(buf, "pflash")) { type = IF_PFLASH; max_devs = 0; } else if (!strcmp(buf, "mtd")) { type = IF_MTD; max_devs = 0; } else if (!strcmp(buf, "sd")) { type = IF_SD; max_devs = 0; } else if (!strcmp(buf, "virtio")) { type = IF_VIRTIO; max_devs = 0; } else if (!strcmp(buf, "xen")) { type = IF_XEN; max_devs = 0; } else if (!strcmp(buf, "none")) { type = IF_NONE; max_devs = 0; } else { fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf); return NULL; } } if (cyls || heads || secs) { if (cyls < 1 || cyls > 16383) { fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf); return NULL; } if (heads < 1 || heads > 16) { fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf); return NULL; } if (secs < 1 || secs > 63) { fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf); return NULL; } } if ((buf = qemu_opt_get(opts, "trans")) != NULL) { if (!cyls) { fprintf(stderr, "qemu: '%s' trans must be used with cyls,heads and secs\n", buf); return NULL; } if (!strcmp(buf, "none")) translation = BIOS_ATA_TRANSLATION_NONE; else if (!strcmp(buf, "lba")) translation = BIOS_ATA_TRANSLATION_LBA; else if (!strcmp(buf, "auto")) translation = BIOS_ATA_TRANSLATION_AUTO; else { fprintf(stderr, "qemu: '%s' invalid translation type\n", buf); return NULL; } } if ((buf = qemu_opt_get(opts, "media")) != NULL) { if (!strcmp(buf, "disk")) { media = MEDIA_DISK; } else if (!strcmp(buf, "cdrom")) { if (cyls || secs || heads) { fprintf(stderr, "qemu: '%s' invalid physical CHS format\n", buf); return NULL; } media = MEDIA_CDROM; } else { fprintf(stderr, "qemu: '%s' invalid media\n", buf); return NULL; } } if ((buf = qemu_opt_get(opts, "cache")) != NULL) { if (!strcmp(buf, "off") || !strcmp(buf, "none")) cache = 0; else if (!strcmp(buf, "writethrough")) cache = 1; else if (!strcmp(buf, "writeback")) cache = 2; else { fprintf(stderr, "qemu: invalid cache option\n"); return NULL; } } #ifdef CONFIG_LINUX_AIO if ((buf = qemu_opt_get(opts, "aio")) != NULL) { if (!strcmp(buf, "threads")) aio = 0; else if (!strcmp(buf, "native")) aio = 1; else { fprintf(stderr, "qemu: invalid aio option\n"); return NULL; } } #endif if ((buf = qemu_opt_get(opts, "format")) != NULL) { if (strcmp(buf, "?") == 0) { fprintf(stderr, "qemu: Supported formats:"); bdrv_iterate_format(bdrv_format_print, NULL); fprintf(stderr, "\n"); return NULL; } drv = bdrv_find_format(buf); if (!drv) { fprintf(stderr, "qemu: '%s' invalid format\n", buf); return NULL; } } onerror = BLOCK_ERR_STOP_ENOSPC; if ((buf = qemu_opt_get(opts, "werror")) != NULL) { if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO) { fprintf(stderr, "werror is no supported by this format\n"); return NULL; } if (!strcmp(buf, "ignore")) onerror = BLOCK_ERR_IGNORE; else if (!strcmp(buf, "enospc")) onerror = BLOCK_ERR_STOP_ENOSPC; else if (!strcmp(buf, "stop")) onerror = BLOCK_ERR_STOP_ANY; else if (!strcmp(buf, "report")) onerror = BLOCK_ERR_REPORT; else { fprintf(stderr, "qemu: '%s' invalid write error action\n", buf); return NULL; } } if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { if (type != IF_VIRTIO) { fprintf(stderr, "addr is not supported\n"); return NULL; } } /* compute bus and unit according index */ if (index != -1) { if (bus_id != 0 || unit_id != -1) { fprintf(stderr, "qemu: index cannot be used with bus and unit\n"); return NULL; } if (max_devs == 0) { unit_id = index; bus_id = 0; } else { unit_id = index % max_devs; bus_id = index / max_devs; } } /* if user doesn't specify a unit_id, * try to find the first free */ if (unit_id == -1) { unit_id = 0; while (drive_get(type, bus_id, unit_id) != NULL) { unit_id++; if (max_devs && unit_id >= max_devs) { unit_id -= max_devs; bus_id++; } } } /* check unit id */ if (max_devs && unit_id >= max_devs) { fprintf(stderr, "qemu: unit %d too big (max is %d)\n", unit_id, max_devs - 1); return NULL; } /* * ignore multiple definitions */ if (drive_get(type, bus_id, unit_id) != NULL) { *fatal_error = 0; return NULL; } /* init */ dinfo = qemu_mallocz(sizeof(*dinfo)); if ((buf = qemu_opts_id(opts)) != NULL) { dinfo->id = qemu_strdup(buf); } else { /* no id supplied -> create one */ dinfo->id = qemu_mallocz(32); if (type == IF_IDE || type == IF_SCSI) mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; if (max_devs) snprintf(dinfo->id, 32, "%s%i%s%i", devname, bus_id, mediastr, unit_id); else snprintf(dinfo->id, 32, "%s%s%i", devname, mediastr, unit_id); } dinfo->bdrv = bdrv_new(dinfo->id); dinfo->devaddr = devaddr; dinfo->type = type; dinfo->bus = bus_id; dinfo->unit = unit_id; dinfo->onerror = onerror; dinfo->opts = opts; if (serial) strncpy(dinfo->serial, serial, sizeof(serial)); TAILQ_INSERT_TAIL(&drives, dinfo, next); switch(type) { case IF_IDE: case IF_SCSI: case IF_XEN: switch(media) { case MEDIA_DISK: if (cyls != 0) { bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); bdrv_set_translation_hint(dinfo->bdrv, translation); } break; case MEDIA_CDROM: bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM); break; } break; case IF_SD: /* FIXME: This isn't really a floppy, but it's a reasonable approximation. */ case IF_FLOPPY: bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY); break; case IF_PFLASH: case IF_MTD: case IF_NONE: break; case IF_VIRTIO: /* add virtio block device */ opts = qemu_opts_create(&qemu_device_opts, NULL, 0); qemu_opt_set(opts, "driver", "virtio-blk-pci"); qemu_opt_set(opts, "drive", dinfo->id); if (devaddr) qemu_opt_set(opts, "addr", devaddr); break; case IF_COUNT: abort(); } if (!file) { *fatal_error = 0; return NULL; } bdrv_flags = 0; if (snapshot) { bdrv_flags |= BDRV_O_SNAPSHOT; cache = 2; /* always use write-back with snapshot */ } if (cache == 0) /* no caching */ bdrv_flags |= BDRV_O_NOCACHE; else if (cache == 2) /* write-back */ bdrv_flags |= BDRV_O_CACHE_WB; if (aio == 1) { bdrv_flags |= BDRV_O_NATIVE_AIO; } else { bdrv_flags &= ~BDRV_O_NATIVE_AIO; } if (bdrv_open2(dinfo->bdrv, file, bdrv_flags, drv) < 0) { fprintf(stderr, "qemu: could not open disk image %s\n", file); return NULL; } if (bdrv_key_required(dinfo->bdrv)) autostart = 0; *fatal_error = 0; return dinfo; }