static struct ioreq *ioreq_start(struct XenBlkDev *blkdev) { struct ioreq *ioreq = NULL; if (QLIST_EMPTY(&blkdev->freelist)) { if (blkdev->requests_total >= max_requests) { goto out; } /* allocate new struct */ ioreq = g_malloc0(sizeof(*ioreq)); ioreq->blkdev = blkdev; blkdev->requests_total++; qemu_iovec_init(&ioreq->v, BLKIF_MAX_SEGMENTS_PER_REQUEST); } else { /* get one from freelist */ ioreq = QLIST_FIRST(&blkdev->freelist); QLIST_REMOVE(ioreq, list); qemu_iovec_reset(&ioreq->v); } QLIST_INSERT_HEAD(&blkdev->inflight, ioreq, list); blkdev->requests_inflight++; out: return ioreq; }
static XenBlockRequest *xen_block_start_request(XenBlockDataPlane *dataplane) { XenBlockRequest *request = NULL; if (QLIST_EMPTY(&dataplane->freelist)) { if (dataplane->requests_total >= dataplane->max_requests) { goto out; } /* allocate new struct */ request = g_malloc0(sizeof(*request)); request->dataplane = dataplane; /* * We cannot need more pages per requests than this, and since we * re-use requests, allocate the memory once here. It will be freed * xen_block_dataplane_destroy() when the request list is freed. */ request->buf = qemu_memalign(XC_PAGE_SIZE, BLKIF_MAX_SEGMENTS_PER_REQUEST * XC_PAGE_SIZE); dataplane->requests_total++; qemu_iovec_init(&request->v, 1); } else { /* get one from freelist */ request = QLIST_FIRST(&dataplane->freelist); QLIST_REMOVE(request, list); } QLIST_INSERT_HEAD(&dataplane->inflight, request, list); dataplane->requests_inflight++; out: return request; }
/* default qdev initialization function for PCI-to-PCI bridge */ int pci_bridge_initfn(PCIDevice *dev) { PCIBus *parent = dev->bus; PCIBridge *br = DO_UPCAST(PCIBridge, dev, dev); PCIBus *sec_bus = &br->sec_bus; pci_set_word(dev->config + PCI_STATUS, PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_PCI); dev->config[PCI_HEADER_TYPE] = (dev->config[PCI_HEADER_TYPE] & PCI_HEADER_TYPE_MULTI_FUNCTION) | PCI_HEADER_TYPE_BRIDGE; pci_set_word(dev->config + PCI_SEC_STATUS, PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); qbus_create_inplace(&sec_bus->qbus, &pci_bus_info, &dev->qdev, br->bus_name); sec_bus->parent_dev = dev; sec_bus->map_irq = br->map_irq; sec_bus->address_space_mem = &br->address_space_mem; memory_region_init(&br->address_space_mem, "pci_bridge_pci", INT64_MAX); sec_bus->address_space_io = &br->address_space_io; memory_region_init(&br->address_space_io, "pci_bridge_io", 65536); pci_bridge_region_init(br); QLIST_INIT(&sec_bus->child); QLIST_INSERT_HEAD(&parent->child, sec_bus, sibling); return 0; }
static void ioreq_finish(struct ioreq *ioreq) { struct XenBlkDev *blkdev = ioreq->blkdev; QLIST_REMOVE(ioreq, list); QLIST_INSERT_HEAD(&blkdev->finished, ioreq, list); blkdev->requests_inflight--; blkdev->requests_finished++; }
static void ioreq_release(struct ioreq *ioreq) { struct XenBlkDev *blkdev = ioreq->blkdev; QLIST_REMOVE(ioreq, list); memset(ioreq, 0, sizeof(*ioreq)); ioreq->blkdev = blkdev; QLIST_INSERT_HEAD(&blkdev->freelist, ioreq, list); blkdev->requests_finished--; }
static void xen_block_release_request(XenBlockRequest *request) { XenBlockDataPlane *dataplane = request->dataplane; QLIST_REMOVE(request, list); reset_request(request); request->dataplane = dataplane; QLIST_INSERT_HEAD(&dataplane->freelist, request, list); dataplane->requests_inflight--; }
static void ioreq_release(struct ioreq *ioreq, bool finish) { struct XenBlkDev *blkdev = ioreq->blkdev; QLIST_REMOVE(ioreq, list); ioreq_reset(ioreq); ioreq->blkdev = blkdev; QLIST_INSERT_HEAD(&blkdev->freelist, ioreq, list); if (finish) { blkdev->requests_finished--; } else { blkdev->requests_inflight--; } }
void qdict_put_obj(QDict *qdict, const char *key, QObject *value) { unsigned int hash; QDictEntry *entry; hash = tdb_hash(key) % QDICT_HASH_SIZE; entry = qdict_find(qdict, key, hash); if (entry) { /* replace key's value */ qobject_decref(entry->value); entry->value = value; } else { /* allocate a new entry */ entry = alloc_entry(key, value); QLIST_INSERT_HEAD(&qdict->table[hash], entry, next); qdict->size++; } }
struct yagl_compiled_transfer *yagl_compiled_transfer_create(target_ulong va, uint32_t len, bool is_write) { struct yagl_compiled_transfer *ct; ct = g_malloc0(sizeof(*ct)); ct->va = va; ct->len = len; ct->is_write = is_write; QLIST_INSERT_HEAD(&cur_ts->t->compiled_transfers, ct, entry); ct->in_list = true; return ct; }
/* default qdev initialization function for PCI-to-PCI bridge */ int pci_bridge_initfn(PCIDevice *dev) { PCIBus *parent = dev->bus; PCIBridge *br = DO_UPCAST(PCIBridge, dev, dev); PCIBus *sec_bus = &br->sec_bus; pci_word_test_and_set_mask(dev->config + PCI_STATUS, PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_PCI); dev->config[PCI_HEADER_TYPE] = (dev->config[PCI_HEADER_TYPE] & PCI_HEADER_TYPE_MULTI_FUNCTION) | PCI_HEADER_TYPE_BRIDGE; pci_set_word(dev->config + PCI_SEC_STATUS, PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); /* * If we don't specify the name, the bus will be addressed as <id>.0, where * id is the device id. * Since PCI Bridge devices have a single bus each, we don't need the index: * let users address the bus using the device name. */ if (!br->bus_name && dev->qdev.id && *dev->qdev.id) { br->bus_name = dev->qdev.id; } qbus_create_inplace(&sec_bus->qbus, TYPE_PCI_BUS, &dev->qdev, br->bus_name); sec_bus->parent_dev = dev; sec_bus->map_irq = br->map_irq; sec_bus->address_space_mem = &br->address_space_mem; memory_region_init(&br->address_space_mem, "pci_bridge_pci", INT64_MAX); sec_bus->address_space_io = &br->address_space_io; memory_region_init(&br->address_space_io, "pci_bridge_io", 65536); pci_bridge_region_init(br); QLIST_INIT(&sec_bus->child); QLIST_INSERT_HEAD(&parent->child, sec_bus, sibling); return 0; }
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) { V9fsState *s; int i, len; struct stat stat; FsTypeEntry *fse; s = (V9fsState *)virtio_common_init("virtio-9p", VIRTIO_ID_9P, sizeof(struct virtio_9p_config)+ MAX_TAG_LEN, sizeof(V9fsState)); /* initialize pdu allocator */ QLIST_INIT(&s->free_list); for (i = 0; i < (MAX_REQ - 1); i++) { QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); } s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); fse = get_fsdev_fsentry(conf->fsdev_id); if (!fse) { /* We don't have a fsdev identified by fsdev_id */ fprintf(stderr, "Virtio-9p device couldn't find fsdev with the " "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL"); exit(1); } if (!fse->path || !conf->tag) { /* we haven't specified a mount_tag or the path */ fprintf(stderr, "fsdev with id %s needs path " "and Virtio-9p device needs mount_tag arguments\n", conf->fsdev_id); exit(1); } if (!strcmp(fse->security_model, "passthrough")) { /* Files on the Fileserver set to client user credentials */ s->ctx.fs_sm = SM_PASSTHROUGH; s->ctx.xops = passthrough_xattr_ops; } else if (!strcmp(fse->security_model, "mapped")) { /* Files on the fileserver are set to QEMU credentials. * Client user credentials are saved in extended attributes. */ s->ctx.fs_sm = SM_MAPPED; s->ctx.xops = mapped_xattr_ops; } else if (!strcmp(fse->security_model, "none")) { /* * Files on the fileserver are set to QEMU credentials. */ s->ctx.fs_sm = SM_NONE; s->ctx.xops = none_xattr_ops; } else { fprintf(stderr, "Default to security_model=none. You may want" " enable advanced security model using " "security option:\n\t security_model=passthrough\n\t " "security_model=mapped\n"); s->ctx.fs_sm = SM_NONE; s->ctx.xops = none_xattr_ops; } if (lstat(fse->path, &stat)) { fprintf(stderr, "share path %s does not exist\n", fse->path); exit(1); } else if (!S_ISDIR(stat.st_mode)) { fprintf(stderr, "share path %s is not a directory\n", fse->path); exit(1); } s->ctx.fs_root = qemu_strdup(fse->path); len = strlen(conf->tag); if (len > MAX_TAG_LEN) { len = MAX_TAG_LEN; } /* s->tag is non-NULL terminated string */ s->tag = qemu_malloc(len); memcpy(s->tag, conf->tag, len); s->tag_len = len; s->ctx.uid = -1; s->ops = fse->ops; s->vdev.get_features = virtio_9p_get_features; s->config_size = sizeof(struct virtio_9p_config) + s->tag_len; s->vdev.get_config = virtio_9p_get_config; return &s->vdev; }
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) { V9fsState *s; int i, len; struct stat stat; FsDriverEntry *fse; V9fsPath path; s = (V9fsState *)virtio_common_init("virtio-9p", VIRTIO_ID_9P, sizeof(struct virtio_9p_config)+ MAX_TAG_LEN, sizeof(V9fsState)); /* initialize pdu allocator */ QLIST_INIT(&s->free_list); QLIST_INIT(&s->active_list); for (i = 0; i < (MAX_REQ - 1); i++) { QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); } s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); fse = get_fsdev_fsentry(conf->fsdev_id); if (!fse) { /* We don't have a fsdev identified by fsdev_id */ fprintf(stderr, "Virtio-9p device couldn't find fsdev with the " "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL"); exit(1); } if (!conf->tag) { /* we haven't specified a mount_tag */ fprintf(stderr, "fsdev with id %s needs mount_tag arguments\n", conf->fsdev_id); exit(1); } s->ctx.export_flags = fse->export_flags; s->ctx.fs_root = g_strdup(fse->path); s->ctx.exops.get_st_gen = NULL; len = strlen(conf->tag); if (len > MAX_TAG_LEN - 1) { fprintf(stderr, "mount tag '%s' (%d bytes) is longer than " "maximum (%d bytes)", conf->tag, len, MAX_TAG_LEN - 1); exit(1); } s->tag = g_strdup(conf->tag); s->ctx.uid = -1; s->ops = fse->ops; s->vdev.get_features = virtio_9p_get_features; s->config_size = sizeof(struct virtio_9p_config) + len; s->vdev.get_config = virtio_9p_get_config; s->fid_list = NULL; qemu_co_rwlock_init(&s->rename_lock); if (s->ops->init(&s->ctx) < 0) { fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s" " and export path:%s\n", conf->fsdev_id, s->ctx.fs_root); exit(1); } if (v9fs_init_worker_threads() < 0) { fprintf(stderr, "worker thread initialization failed\n"); exit(1); } /* * Check details of export path, We need to use fs driver * call back to do that. Since we are in the init path, we don't * use co-routines here. */ v9fs_path_init(&path); if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { fprintf(stderr, "error in converting name to path %s", strerror(errno)); exit(1); } if (s->ops->lstat(&s->ctx, &path, &stat)) { fprintf(stderr, "share path %s does not exist\n", fse->path); exit(1); } else if (!S_ISDIR(stat.st_mode)) { fprintf(stderr, "share path %s is not a directory\n", fse->path); exit(1); } v9fs_path_free(&path); return &s->vdev; }
static void virtio_9p_device_realize(DeviceState *dev, Error **errp) { VirtIODevice *vdev = VIRTIO_DEVICE(dev); V9fsState *s = VIRTIO_9P(dev); int i, len; struct stat stat; FsDriverEntry *fse; V9fsPath path; virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, sizeof(struct virtio_9p_config) + MAX_TAG_LEN); /* initialize pdu allocator */ QLIST_INIT(&s->free_list); QLIST_INIT(&s->active_list); for (i = 0; i < (MAX_REQ - 1); i++) { QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); } s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output); v9fs_path_init(&path); fse = get_fsdev_fsentry(s->fsconf.fsdev_id); if (!fse) { /* We don't have a fsdev identified by fsdev_id */ error_setg(errp, "Virtio-9p device couldn't find fsdev with the " "id = %s", s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); goto out; } if (!s->fsconf.tag) { /* we haven't specified a mount_tag */ error_setg(errp, "fsdev with id %s needs mount_tag arguments", s->fsconf.fsdev_id); goto out; } s->ctx.export_flags = fse->export_flags; s->ctx.fs_root = g_strdup(fse->path); s->ctx.exops.get_st_gen = NULL; len = strlen(s->fsconf.tag); if (len > MAX_TAG_LEN - 1) { error_setg(errp, "mount tag '%s' (%d bytes) is longer than " "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); goto out; } s->tag = g_strdup(s->fsconf.tag); s->ctx.uid = -1; s->ops = fse->ops; s->config_size = sizeof(struct virtio_9p_config) + len; s->fid_list = NULL; qemu_co_rwlock_init(&s->rename_lock); if (s->ops->init(&s->ctx) < 0) { error_setg(errp, "Virtio-9p Failed to initialize fs-driver with id:%s" " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); goto out; } if (v9fs_init_worker_threads() < 0) { error_setg(errp, "worker thread initialization failed"); goto out; } /* * Check details of export path, We need to use fs driver * call back to do that. Since we are in the init path, we don't * use co-routines here. */ if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { error_setg(errp, "error in converting name to path %s", strerror(errno)); goto out; } if (s->ops->lstat(&s->ctx, &path, &stat)) { error_setg(errp, "share path %s does not exist", fse->path); goto out; } else if (!S_ISDIR(stat.st_mode)) { error_setg(errp, "share path %s is not a directory", fse->path); goto out; } v9fs_path_free(&path); register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s); return; out: g_free(s->ctx.fs_root); g_free(s->tag); virtio_cleanup(vdev); v9fs_path_free(&path); }