16e790746SPaolo Bonzini /* 26e790746SPaolo Bonzini * Virtio Block Device 36e790746SPaolo Bonzini * 46e790746SPaolo Bonzini * Copyright IBM, Corp. 2007 56e790746SPaolo Bonzini * 66e790746SPaolo Bonzini * Authors: 76e790746SPaolo Bonzini * Anthony Liguori <aliguori@us.ibm.com> 86e790746SPaolo Bonzini * 96e790746SPaolo Bonzini * This work is licensed under the terms of the GNU GPL, version 2. See 106e790746SPaolo Bonzini * the COPYING file in the top-level directory. 116e790746SPaolo Bonzini * 126e790746SPaolo Bonzini */ 136e790746SPaolo Bonzini 146e790746SPaolo Bonzini #include "qemu-common.h" 156e790746SPaolo Bonzini #include "qemu/error-report.h" 166e790746SPaolo Bonzini #include "trace.h" 176e790746SPaolo Bonzini #include "hw/block/block.h" 186e790746SPaolo Bonzini #include "sysemu/blockdev.h" 196e790746SPaolo Bonzini #include "hw/virtio/virtio-blk.h" 206e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 216e790746SPaolo Bonzini # include "dataplane/virtio-blk.h" 2284db52d0SStefan Hajnoczi # include "migration/migration.h" 236e790746SPaolo Bonzini #endif 246e790746SPaolo Bonzini #include "block/scsi.h" 256e790746SPaolo Bonzini #ifdef __linux__ 266e790746SPaolo Bonzini # include <scsi/sg.h> 276e790746SPaolo Bonzini #endif 286e790746SPaolo Bonzini #include "hw/virtio/virtio-bus.h" 296e790746SPaolo Bonzini 306e790746SPaolo Bonzini typedef struct VirtIOBlockReq 316e790746SPaolo Bonzini { 326e790746SPaolo Bonzini VirtIOBlock *dev; 336e790746SPaolo Bonzini VirtQueueElement elem; 346e790746SPaolo Bonzini struct virtio_blk_inhdr *in; 356e790746SPaolo Bonzini struct virtio_blk_outhdr *out; 366e790746SPaolo Bonzini struct virtio_scsi_inhdr *scsi; 376e790746SPaolo Bonzini QEMUIOVector qiov; 386e790746SPaolo Bonzini struct VirtIOBlockReq *next; 396e790746SPaolo Bonzini BlockAcctCookie acct; 406e790746SPaolo Bonzini } VirtIOBlockReq; 416e790746SPaolo Bonzini 426e790746SPaolo Bonzini static void virtio_blk_req_complete(VirtIOBlockReq *req, int status) 436e790746SPaolo Bonzini { 446e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 456e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 466e790746SPaolo Bonzini 476e790746SPaolo Bonzini trace_virtio_blk_req_complete(req, status); 486e790746SPaolo Bonzini 496e790746SPaolo Bonzini stb_p(&req->in->status, status); 506e790746SPaolo Bonzini virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in)); 516e790746SPaolo Bonzini virtio_notify(vdev, s->vq); 526e790746SPaolo Bonzini } 536e790746SPaolo Bonzini 546e790746SPaolo Bonzini static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, 556e790746SPaolo Bonzini bool is_read) 566e790746SPaolo Bonzini { 576e790746SPaolo Bonzini BlockErrorAction action = bdrv_get_error_action(req->dev->bs, is_read, error); 586e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 596e790746SPaolo Bonzini 606e790746SPaolo Bonzini if (action == BDRV_ACTION_STOP) { 616e790746SPaolo Bonzini req->next = s->rq; 626e790746SPaolo Bonzini s->rq = req; 636e790746SPaolo Bonzini } else if (action == BDRV_ACTION_REPORT) { 646e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 656e790746SPaolo Bonzini bdrv_acct_done(s->bs, &req->acct); 666e790746SPaolo Bonzini g_free(req); 676e790746SPaolo Bonzini } 686e790746SPaolo Bonzini 696e790746SPaolo Bonzini bdrv_error_action(s->bs, action, is_read, error); 706e790746SPaolo Bonzini return action != BDRV_ACTION_IGNORE; 716e790746SPaolo Bonzini } 726e790746SPaolo Bonzini 736e790746SPaolo Bonzini static void virtio_blk_rw_complete(void *opaque, int ret) 746e790746SPaolo Bonzini { 756e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 766e790746SPaolo Bonzini 776e790746SPaolo Bonzini trace_virtio_blk_rw_complete(req, ret); 786e790746SPaolo Bonzini 796e790746SPaolo Bonzini if (ret) { 806e790746SPaolo Bonzini bool is_read = !(ldl_p(&req->out->type) & VIRTIO_BLK_T_OUT); 816e790746SPaolo Bonzini if (virtio_blk_handle_rw_error(req, -ret, is_read)) 826e790746SPaolo Bonzini return; 836e790746SPaolo Bonzini } 846e790746SPaolo Bonzini 856e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 866e790746SPaolo Bonzini bdrv_acct_done(req->dev->bs, &req->acct); 876e790746SPaolo Bonzini g_free(req); 886e790746SPaolo Bonzini } 896e790746SPaolo Bonzini 906e790746SPaolo Bonzini static void virtio_blk_flush_complete(void *opaque, int ret) 916e790746SPaolo Bonzini { 926e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 936e790746SPaolo Bonzini 946e790746SPaolo Bonzini if (ret) { 956e790746SPaolo Bonzini if (virtio_blk_handle_rw_error(req, -ret, 0)) { 966e790746SPaolo Bonzini return; 976e790746SPaolo Bonzini } 986e790746SPaolo Bonzini } 996e790746SPaolo Bonzini 1006e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 1016e790746SPaolo Bonzini bdrv_acct_done(req->dev->bs, &req->acct); 1026e790746SPaolo Bonzini g_free(req); 1036e790746SPaolo Bonzini } 1046e790746SPaolo Bonzini 1056e790746SPaolo Bonzini static VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s) 1066e790746SPaolo Bonzini { 1076e790746SPaolo Bonzini VirtIOBlockReq *req = g_malloc(sizeof(*req)); 1086e790746SPaolo Bonzini req->dev = s; 1096e790746SPaolo Bonzini req->qiov.size = 0; 1106e790746SPaolo Bonzini req->next = NULL; 1116e790746SPaolo Bonzini return req; 1126e790746SPaolo Bonzini } 1136e790746SPaolo Bonzini 1146e790746SPaolo Bonzini static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s) 1156e790746SPaolo Bonzini { 1166e790746SPaolo Bonzini VirtIOBlockReq *req = virtio_blk_alloc_request(s); 1176e790746SPaolo Bonzini 1186e790746SPaolo Bonzini if (req != NULL) { 1196e790746SPaolo Bonzini if (!virtqueue_pop(s->vq, &req->elem)) { 1206e790746SPaolo Bonzini g_free(req); 1216e790746SPaolo Bonzini return NULL; 1226e790746SPaolo Bonzini } 1236e790746SPaolo Bonzini } 1246e790746SPaolo Bonzini 1256e790746SPaolo Bonzini return req; 1266e790746SPaolo Bonzini } 1276e790746SPaolo Bonzini 1286e790746SPaolo Bonzini static void virtio_blk_handle_scsi(VirtIOBlockReq *req) 1296e790746SPaolo Bonzini { 1306e790746SPaolo Bonzini #ifdef __linux__ 1316e790746SPaolo Bonzini int ret; 1326e790746SPaolo Bonzini int i; 1336e790746SPaolo Bonzini #endif 1346e790746SPaolo Bonzini int status = VIRTIO_BLK_S_OK; 1356e790746SPaolo Bonzini 1366e790746SPaolo Bonzini /* 1376e790746SPaolo Bonzini * We require at least one output segment each for the virtio_blk_outhdr 1386e790746SPaolo Bonzini * and the SCSI command block. 1396e790746SPaolo Bonzini * 1406e790746SPaolo Bonzini * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr 1416e790746SPaolo Bonzini * and the sense buffer pointer in the input segments. 1426e790746SPaolo Bonzini */ 1436e790746SPaolo Bonzini if (req->elem.out_num < 2 || req->elem.in_num < 3) { 1446e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 1456e790746SPaolo Bonzini g_free(req); 1466e790746SPaolo Bonzini return; 1476e790746SPaolo Bonzini } 1486e790746SPaolo Bonzini 1496e790746SPaolo Bonzini /* 1506e790746SPaolo Bonzini * The scsi inhdr is placed in the second-to-last input segment, just 1516e790746SPaolo Bonzini * before the regular inhdr. 1526e790746SPaolo Bonzini */ 1536e790746SPaolo Bonzini req->scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; 1546e790746SPaolo Bonzini 1556e790746SPaolo Bonzini if (!req->dev->blk.scsi) { 1566e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 1576e790746SPaolo Bonzini goto fail; 1586e790746SPaolo Bonzini } 1596e790746SPaolo Bonzini 1606e790746SPaolo Bonzini /* 1616e790746SPaolo Bonzini * No support for bidirection commands yet. 1626e790746SPaolo Bonzini */ 1636e790746SPaolo Bonzini if (req->elem.out_num > 2 && req->elem.in_num > 3) { 1646e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 1656e790746SPaolo Bonzini goto fail; 1666e790746SPaolo Bonzini } 1676e790746SPaolo Bonzini 1686e790746SPaolo Bonzini #ifdef __linux__ 1696e790746SPaolo Bonzini struct sg_io_hdr hdr; 1706e790746SPaolo Bonzini memset(&hdr, 0, sizeof(struct sg_io_hdr)); 1716e790746SPaolo Bonzini hdr.interface_id = 'S'; 1726e790746SPaolo Bonzini hdr.cmd_len = req->elem.out_sg[1].iov_len; 1736e790746SPaolo Bonzini hdr.cmdp = req->elem.out_sg[1].iov_base; 1746e790746SPaolo Bonzini hdr.dxfer_len = 0; 1756e790746SPaolo Bonzini 1766e790746SPaolo Bonzini if (req->elem.out_num > 2) { 1776e790746SPaolo Bonzini /* 1786e790746SPaolo Bonzini * If there are more than the minimally required 2 output segments 1796e790746SPaolo Bonzini * there is write payload starting from the third iovec. 1806e790746SPaolo Bonzini */ 1816e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_TO_DEV; 1826e790746SPaolo Bonzini hdr.iovec_count = req->elem.out_num - 2; 1836e790746SPaolo Bonzini 1846e790746SPaolo Bonzini for (i = 0; i < hdr.iovec_count; i++) 1856e790746SPaolo Bonzini hdr.dxfer_len += req->elem.out_sg[i + 2].iov_len; 1866e790746SPaolo Bonzini 1876e790746SPaolo Bonzini hdr.dxferp = req->elem.out_sg + 2; 1886e790746SPaolo Bonzini 1896e790746SPaolo Bonzini } else if (req->elem.in_num > 3) { 1906e790746SPaolo Bonzini /* 1916e790746SPaolo Bonzini * If we have more than 3 input segments the guest wants to actually 1926e790746SPaolo Bonzini * read data. 1936e790746SPaolo Bonzini */ 1946e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_FROM_DEV; 1956e790746SPaolo Bonzini hdr.iovec_count = req->elem.in_num - 3; 1966e790746SPaolo Bonzini for (i = 0; i < hdr.iovec_count; i++) 1976e790746SPaolo Bonzini hdr.dxfer_len += req->elem.in_sg[i].iov_len; 1986e790746SPaolo Bonzini 1996e790746SPaolo Bonzini hdr.dxferp = req->elem.in_sg; 2006e790746SPaolo Bonzini } else { 2016e790746SPaolo Bonzini /* 2026e790746SPaolo Bonzini * Some SCSI commands don't actually transfer any data. 2036e790746SPaolo Bonzini */ 2046e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_NONE; 2056e790746SPaolo Bonzini } 2066e790746SPaolo Bonzini 2076e790746SPaolo Bonzini hdr.sbp = req->elem.in_sg[req->elem.in_num - 3].iov_base; 2086e790746SPaolo Bonzini hdr.mx_sb_len = req->elem.in_sg[req->elem.in_num - 3].iov_len; 2096e790746SPaolo Bonzini 2106e790746SPaolo Bonzini ret = bdrv_ioctl(req->dev->bs, SG_IO, &hdr); 2116e790746SPaolo Bonzini if (ret) { 2126e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 2136e790746SPaolo Bonzini goto fail; 2146e790746SPaolo Bonzini } 2156e790746SPaolo Bonzini 2166e790746SPaolo Bonzini /* 2176e790746SPaolo Bonzini * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi) 2186e790746SPaolo Bonzini * clear the masked_status field [hence status gets cleared too, see 2196e790746SPaolo Bonzini * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED 2206e790746SPaolo Bonzini * status has occurred. However they do set DRIVER_SENSE in driver_status 2216e790746SPaolo Bonzini * field. Also a (sb_len_wr > 0) indicates there is a sense buffer. 2226e790746SPaolo Bonzini */ 2236e790746SPaolo Bonzini if (hdr.status == 0 && hdr.sb_len_wr > 0) { 2246e790746SPaolo Bonzini hdr.status = CHECK_CONDITION; 2256e790746SPaolo Bonzini } 2266e790746SPaolo Bonzini 2276e790746SPaolo Bonzini stl_p(&req->scsi->errors, 2286e790746SPaolo Bonzini hdr.status | (hdr.msg_status << 8) | 2296e790746SPaolo Bonzini (hdr.host_status << 16) | (hdr.driver_status << 24)); 2306e790746SPaolo Bonzini stl_p(&req->scsi->residual, hdr.resid); 2316e790746SPaolo Bonzini stl_p(&req->scsi->sense_len, hdr.sb_len_wr); 2326e790746SPaolo Bonzini stl_p(&req->scsi->data_len, hdr.dxfer_len); 2336e790746SPaolo Bonzini 2346e790746SPaolo Bonzini virtio_blk_req_complete(req, status); 2356e790746SPaolo Bonzini g_free(req); 2366e790746SPaolo Bonzini return; 2376e790746SPaolo Bonzini #else 2386e790746SPaolo Bonzini abort(); 2396e790746SPaolo Bonzini #endif 2406e790746SPaolo Bonzini 2416e790746SPaolo Bonzini fail: 2426e790746SPaolo Bonzini /* Just put anything nonzero so that the ioctl fails in the guest. */ 2436e790746SPaolo Bonzini stl_p(&req->scsi->errors, 255); 2446e790746SPaolo Bonzini virtio_blk_req_complete(req, status); 2456e790746SPaolo Bonzini g_free(req); 2466e790746SPaolo Bonzini } 2476e790746SPaolo Bonzini 2486e790746SPaolo Bonzini typedef struct MultiReqBuffer { 2496e790746SPaolo Bonzini BlockRequest blkreq[32]; 2506e790746SPaolo Bonzini unsigned int num_writes; 2516e790746SPaolo Bonzini } MultiReqBuffer; 2526e790746SPaolo Bonzini 2536e790746SPaolo Bonzini static void virtio_submit_multiwrite(BlockDriverState *bs, MultiReqBuffer *mrb) 2546e790746SPaolo Bonzini { 2556e790746SPaolo Bonzini int i, ret; 2566e790746SPaolo Bonzini 2576e790746SPaolo Bonzini if (!mrb->num_writes) { 2586e790746SPaolo Bonzini return; 2596e790746SPaolo Bonzini } 2606e790746SPaolo Bonzini 2616e790746SPaolo Bonzini ret = bdrv_aio_multiwrite(bs, mrb->blkreq, mrb->num_writes); 2626e790746SPaolo Bonzini if (ret != 0) { 2636e790746SPaolo Bonzini for (i = 0; i < mrb->num_writes; i++) { 2646e790746SPaolo Bonzini if (mrb->blkreq[i].error) { 2656e790746SPaolo Bonzini virtio_blk_rw_complete(mrb->blkreq[i].opaque, -EIO); 2666e790746SPaolo Bonzini } 2676e790746SPaolo Bonzini } 2686e790746SPaolo Bonzini } 2696e790746SPaolo Bonzini 2706e790746SPaolo Bonzini mrb->num_writes = 0; 2716e790746SPaolo Bonzini } 2726e790746SPaolo Bonzini 2736e790746SPaolo Bonzini static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) 2746e790746SPaolo Bonzini { 2756e790746SPaolo Bonzini bdrv_acct_start(req->dev->bs, &req->acct, 0, BDRV_ACCT_FLUSH); 2766e790746SPaolo Bonzini 2776e790746SPaolo Bonzini /* 2786e790746SPaolo Bonzini * Make sure all outstanding writes are posted to the backing device. 2796e790746SPaolo Bonzini */ 2806e790746SPaolo Bonzini virtio_submit_multiwrite(req->dev->bs, mrb); 2816e790746SPaolo Bonzini bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req); 2826e790746SPaolo Bonzini } 2836e790746SPaolo Bonzini 2846e790746SPaolo Bonzini static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) 2856e790746SPaolo Bonzini { 2866e790746SPaolo Bonzini BlockRequest *blkreq; 2876e790746SPaolo Bonzini uint64_t sector; 2886e790746SPaolo Bonzini 2896e790746SPaolo Bonzini sector = ldq_p(&req->out->sector); 2906e790746SPaolo Bonzini 2916e790746SPaolo Bonzini bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE); 2926e790746SPaolo Bonzini 2936e790746SPaolo Bonzini trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512); 2946e790746SPaolo Bonzini 2956e790746SPaolo Bonzini if (sector & req->dev->sector_mask) { 2966e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 2976e790746SPaolo Bonzini return; 2986e790746SPaolo Bonzini } 2996e790746SPaolo Bonzini if (req->qiov.size % req->dev->conf->logical_block_size) { 3006e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 3016e790746SPaolo Bonzini return; 3026e790746SPaolo Bonzini } 3036e790746SPaolo Bonzini 3046e790746SPaolo Bonzini if (mrb->num_writes == 32) { 3056e790746SPaolo Bonzini virtio_submit_multiwrite(req->dev->bs, mrb); 3066e790746SPaolo Bonzini } 3076e790746SPaolo Bonzini 3086e790746SPaolo Bonzini blkreq = &mrb->blkreq[mrb->num_writes]; 3096e790746SPaolo Bonzini blkreq->sector = sector; 3106e790746SPaolo Bonzini blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; 3116e790746SPaolo Bonzini blkreq->qiov = &req->qiov; 3126e790746SPaolo Bonzini blkreq->cb = virtio_blk_rw_complete; 3136e790746SPaolo Bonzini blkreq->opaque = req; 3146e790746SPaolo Bonzini blkreq->error = 0; 3156e790746SPaolo Bonzini 3166e790746SPaolo Bonzini mrb->num_writes++; 3176e790746SPaolo Bonzini } 3186e790746SPaolo Bonzini 3196e790746SPaolo Bonzini static void virtio_blk_handle_read(VirtIOBlockReq *req) 3206e790746SPaolo Bonzini { 3216e790746SPaolo Bonzini uint64_t sector; 3226e790746SPaolo Bonzini 3236e790746SPaolo Bonzini sector = ldq_p(&req->out->sector); 3246e790746SPaolo Bonzini 3256e790746SPaolo Bonzini bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ); 3266e790746SPaolo Bonzini 3276e790746SPaolo Bonzini trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512); 3286e790746SPaolo Bonzini 3296e790746SPaolo Bonzini if (sector & req->dev->sector_mask) { 3306e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 3316e790746SPaolo Bonzini return; 3326e790746SPaolo Bonzini } 3336e790746SPaolo Bonzini if (req->qiov.size % req->dev->conf->logical_block_size) { 3346e790746SPaolo Bonzini virtio_blk_rw_complete(req, -EIO); 3356e790746SPaolo Bonzini return; 3366e790746SPaolo Bonzini } 3376e790746SPaolo Bonzini bdrv_aio_readv(req->dev->bs, sector, &req->qiov, 3386e790746SPaolo Bonzini req->qiov.size / BDRV_SECTOR_SIZE, 3396e790746SPaolo Bonzini virtio_blk_rw_complete, req); 3406e790746SPaolo Bonzini } 3416e790746SPaolo Bonzini 3426e790746SPaolo Bonzini static void virtio_blk_handle_request(VirtIOBlockReq *req, 3436e790746SPaolo Bonzini MultiReqBuffer *mrb) 3446e790746SPaolo Bonzini { 3456e790746SPaolo Bonzini uint32_t type; 3466e790746SPaolo Bonzini 3476e790746SPaolo Bonzini if (req->elem.out_num < 1 || req->elem.in_num < 1) { 3486e790746SPaolo Bonzini error_report("virtio-blk missing headers"); 3496e790746SPaolo Bonzini exit(1); 3506e790746SPaolo Bonzini } 3516e790746SPaolo Bonzini 3526e790746SPaolo Bonzini if (req->elem.out_sg[0].iov_len < sizeof(*req->out) || 3536e790746SPaolo Bonzini req->elem.in_sg[req->elem.in_num - 1].iov_len < sizeof(*req->in)) { 3546e790746SPaolo Bonzini error_report("virtio-blk header not in correct element"); 3556e790746SPaolo Bonzini exit(1); 3566e790746SPaolo Bonzini } 3576e790746SPaolo Bonzini 3586e790746SPaolo Bonzini req->out = (void *)req->elem.out_sg[0].iov_base; 3596e790746SPaolo Bonzini req->in = (void *)req->elem.in_sg[req->elem.in_num - 1].iov_base; 3606e790746SPaolo Bonzini 3616e790746SPaolo Bonzini type = ldl_p(&req->out->type); 3626e790746SPaolo Bonzini 3636e790746SPaolo Bonzini if (type & VIRTIO_BLK_T_FLUSH) { 3646e790746SPaolo Bonzini virtio_blk_handle_flush(req, mrb); 3656e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_SCSI_CMD) { 3666e790746SPaolo Bonzini virtio_blk_handle_scsi(req); 3676e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_GET_ID) { 3686e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 3696e790746SPaolo Bonzini 3706e790746SPaolo Bonzini /* 3716e790746SPaolo Bonzini * NB: per existing s/n string convention the string is 3726e790746SPaolo Bonzini * terminated by '\0' only when shorter than buffer. 3736e790746SPaolo Bonzini */ 3746e790746SPaolo Bonzini strncpy(req->elem.in_sg[0].iov_base, 3756e790746SPaolo Bonzini s->blk.serial ? s->blk.serial : "", 3766e790746SPaolo Bonzini MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES)); 3776e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 3786e790746SPaolo Bonzini g_free(req); 3796e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_OUT) { 3806e790746SPaolo Bonzini qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1], 3816e790746SPaolo Bonzini req->elem.out_num - 1); 3826e790746SPaolo Bonzini virtio_blk_handle_write(req, mrb); 3836e790746SPaolo Bonzini } else if (type == VIRTIO_BLK_T_IN || type == VIRTIO_BLK_T_BARRIER) { 3846e790746SPaolo Bonzini /* VIRTIO_BLK_T_IN is 0, so we can't just & it. */ 3856e790746SPaolo Bonzini qemu_iovec_init_external(&req->qiov, &req->elem.in_sg[0], 3866e790746SPaolo Bonzini req->elem.in_num - 1); 3876e790746SPaolo Bonzini virtio_blk_handle_read(req); 3886e790746SPaolo Bonzini } else { 3896e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); 3906e790746SPaolo Bonzini g_free(req); 3916e790746SPaolo Bonzini } 3926e790746SPaolo Bonzini } 3936e790746SPaolo Bonzini 3946e790746SPaolo Bonzini static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) 3956e790746SPaolo Bonzini { 3966e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 3976e790746SPaolo Bonzini VirtIOBlockReq *req; 3986e790746SPaolo Bonzini MultiReqBuffer mrb = { 3996e790746SPaolo Bonzini .num_writes = 0, 4006e790746SPaolo Bonzini }; 4016e790746SPaolo Bonzini 4026e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 4036e790746SPaolo Bonzini /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start 4046e790746SPaolo Bonzini * dataplane here instead of waiting for .set_status(). 4056e790746SPaolo Bonzini */ 4066e790746SPaolo Bonzini if (s->dataplane) { 4076e790746SPaolo Bonzini virtio_blk_data_plane_start(s->dataplane); 4086e790746SPaolo Bonzini return; 4096e790746SPaolo Bonzini } 4106e790746SPaolo Bonzini #endif 4116e790746SPaolo Bonzini 4126e790746SPaolo Bonzini while ((req = virtio_blk_get_request(s))) { 4136e790746SPaolo Bonzini virtio_blk_handle_request(req, &mrb); 4146e790746SPaolo Bonzini } 4156e790746SPaolo Bonzini 4166e790746SPaolo Bonzini virtio_submit_multiwrite(s->bs, &mrb); 4176e790746SPaolo Bonzini 4186e790746SPaolo Bonzini /* 4196e790746SPaolo Bonzini * FIXME: Want to check for completions before returning to guest mode, 4206e790746SPaolo Bonzini * so cached reads and writes are reported as quickly as possible. But 4216e790746SPaolo Bonzini * that should be done in the generic block layer. 4226e790746SPaolo Bonzini */ 4236e790746SPaolo Bonzini } 4246e790746SPaolo Bonzini 4256e790746SPaolo Bonzini static void virtio_blk_dma_restart_bh(void *opaque) 4266e790746SPaolo Bonzini { 4276e790746SPaolo Bonzini VirtIOBlock *s = opaque; 4286e790746SPaolo Bonzini VirtIOBlockReq *req = s->rq; 4296e790746SPaolo Bonzini MultiReqBuffer mrb = { 4306e790746SPaolo Bonzini .num_writes = 0, 4316e790746SPaolo Bonzini }; 4326e790746SPaolo Bonzini 4336e790746SPaolo Bonzini qemu_bh_delete(s->bh); 4346e790746SPaolo Bonzini s->bh = NULL; 4356e790746SPaolo Bonzini 4366e790746SPaolo Bonzini s->rq = NULL; 4376e790746SPaolo Bonzini 4386e790746SPaolo Bonzini while (req) { 4396e790746SPaolo Bonzini virtio_blk_handle_request(req, &mrb); 4406e790746SPaolo Bonzini req = req->next; 4416e790746SPaolo Bonzini } 4426e790746SPaolo Bonzini 4436e790746SPaolo Bonzini virtio_submit_multiwrite(s->bs, &mrb); 4446e790746SPaolo Bonzini } 4456e790746SPaolo Bonzini 4466e790746SPaolo Bonzini static void virtio_blk_dma_restart_cb(void *opaque, int running, 4476e790746SPaolo Bonzini RunState state) 4486e790746SPaolo Bonzini { 4496e790746SPaolo Bonzini VirtIOBlock *s = opaque; 4506e790746SPaolo Bonzini 4516e790746SPaolo Bonzini if (!running) { 4526e790746SPaolo Bonzini return; 4536e790746SPaolo Bonzini } 4546e790746SPaolo Bonzini 4556e790746SPaolo Bonzini if (!s->bh) { 4566e790746SPaolo Bonzini s->bh = qemu_bh_new(virtio_blk_dma_restart_bh, s); 4576e790746SPaolo Bonzini qemu_bh_schedule(s->bh); 4586e790746SPaolo Bonzini } 4596e790746SPaolo Bonzini } 4606e790746SPaolo Bonzini 4616e790746SPaolo Bonzini static void virtio_blk_reset(VirtIODevice *vdev) 4626e790746SPaolo Bonzini { 4636e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 4646e790746SPaolo Bonzini 465*ef5bc962SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 4666e790746SPaolo Bonzini if (s->dataplane) { 4676e790746SPaolo Bonzini virtio_blk_data_plane_stop(s->dataplane); 4686e790746SPaolo Bonzini } 4696e790746SPaolo Bonzini #endif 4706e790746SPaolo Bonzini 4716e790746SPaolo Bonzini /* 4726e790746SPaolo Bonzini * This should cancel pending requests, but can't do nicely until there 4736e790746SPaolo Bonzini * are per-device request lists. 4746e790746SPaolo Bonzini */ 4756e790746SPaolo Bonzini bdrv_drain_all(); 476*ef5bc962SPaolo Bonzini bdrv_set_enable_write_cache(s->bs, s->original_wce); 4776e790746SPaolo Bonzini } 4786e790746SPaolo Bonzini 4796e790746SPaolo Bonzini /* coalesce internal state, copy to pci i/o region 0 4806e790746SPaolo Bonzini */ 4816e790746SPaolo Bonzini static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) 4826e790746SPaolo Bonzini { 4836e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 4846e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 4856e790746SPaolo Bonzini uint64_t capacity; 4866e790746SPaolo Bonzini int blk_size = s->conf->logical_block_size; 4876e790746SPaolo Bonzini 4886e790746SPaolo Bonzini bdrv_get_geometry(s->bs, &capacity); 4896e790746SPaolo Bonzini memset(&blkcfg, 0, sizeof(blkcfg)); 4906e790746SPaolo Bonzini stq_raw(&blkcfg.capacity, capacity); 4916e790746SPaolo Bonzini stl_raw(&blkcfg.seg_max, 128 - 2); 4926e790746SPaolo Bonzini stw_raw(&blkcfg.cylinders, s->conf->cyls); 4936e790746SPaolo Bonzini stl_raw(&blkcfg.blk_size, blk_size); 4946e790746SPaolo Bonzini stw_raw(&blkcfg.min_io_size, s->conf->min_io_size / blk_size); 4956e790746SPaolo Bonzini stw_raw(&blkcfg.opt_io_size, s->conf->opt_io_size / blk_size); 4966e790746SPaolo Bonzini blkcfg.heads = s->conf->heads; 4976e790746SPaolo Bonzini /* 4986e790746SPaolo Bonzini * We must ensure that the block device capacity is a multiple of 499e03ba136SPeter Maydell * the logical block size. If that is not the case, let's use 5006e790746SPaolo Bonzini * sector_mask to adopt the geometry to have a correct picture. 5016e790746SPaolo Bonzini * For those devices where the capacity is ok for the given geometry 502e03ba136SPeter Maydell * we don't touch the sector value of the geometry, since some devices 5036e790746SPaolo Bonzini * (like s390 dasd) need a specific value. Here the capacity is already 5046e790746SPaolo Bonzini * cyls*heads*secs*blk_size and the sector value is not block size 5056e790746SPaolo Bonzini * divided by 512 - instead it is the amount of blk_size blocks 5066e790746SPaolo Bonzini * per track (cylinder). 5076e790746SPaolo Bonzini */ 5086e790746SPaolo Bonzini if (bdrv_getlength(s->bs) / s->conf->heads / s->conf->secs % blk_size) { 5096e790746SPaolo Bonzini blkcfg.sectors = s->conf->secs & ~s->sector_mask; 5106e790746SPaolo Bonzini } else { 5116e790746SPaolo Bonzini blkcfg.sectors = s->conf->secs; 5126e790746SPaolo Bonzini } 5136e790746SPaolo Bonzini blkcfg.size_max = 0; 5146e790746SPaolo Bonzini blkcfg.physical_block_exp = get_physical_block_exp(s->conf); 5156e790746SPaolo Bonzini blkcfg.alignment_offset = 0; 5166e790746SPaolo Bonzini blkcfg.wce = bdrv_enable_write_cache(s->bs); 5176e790746SPaolo Bonzini memcpy(config, &blkcfg, sizeof(struct virtio_blk_config)); 5186e790746SPaolo Bonzini } 5196e790746SPaolo Bonzini 5206e790746SPaolo Bonzini static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) 5216e790746SPaolo Bonzini { 5226e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5236e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 5246e790746SPaolo Bonzini 5256e790746SPaolo Bonzini memcpy(&blkcfg, config, sizeof(blkcfg)); 5266e790746SPaolo Bonzini bdrv_set_enable_write_cache(s->bs, blkcfg.wce != 0); 5276e790746SPaolo Bonzini } 5286e790746SPaolo Bonzini 5296e790746SPaolo Bonzini static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) 5306e790746SPaolo Bonzini { 5316e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5326e790746SPaolo Bonzini 5336e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_SEG_MAX); 5346e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_GEOMETRY); 5356e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_TOPOLOGY); 5366e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_BLK_SIZE); 5376e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_SCSI); 5386e790746SPaolo Bonzini 5396e790746SPaolo Bonzini if (s->blk.config_wce) { 5406e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_CONFIG_WCE); 5416e790746SPaolo Bonzini } 5426e790746SPaolo Bonzini if (bdrv_enable_write_cache(s->bs)) 5436e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_WCE); 5446e790746SPaolo Bonzini 5456e790746SPaolo Bonzini if (bdrv_is_read_only(s->bs)) 5466e790746SPaolo Bonzini features |= 1 << VIRTIO_BLK_F_RO; 5476e790746SPaolo Bonzini 5486e790746SPaolo Bonzini return features; 5496e790746SPaolo Bonzini } 5506e790746SPaolo Bonzini 5516e790746SPaolo Bonzini static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) 5526e790746SPaolo Bonzini { 5536e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5546e790746SPaolo Bonzini uint32_t features; 5556e790746SPaolo Bonzini 5566e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 5576e790746SPaolo Bonzini if (s->dataplane && !(status & (VIRTIO_CONFIG_S_DRIVER | 5586e790746SPaolo Bonzini VIRTIO_CONFIG_S_DRIVER_OK))) { 5596e790746SPaolo Bonzini virtio_blk_data_plane_stop(s->dataplane); 5606e790746SPaolo Bonzini } 5616e790746SPaolo Bonzini #endif 5626e790746SPaolo Bonzini 5636e790746SPaolo Bonzini if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 5646e790746SPaolo Bonzini return; 5656e790746SPaolo Bonzini } 5666e790746SPaolo Bonzini 5676e790746SPaolo Bonzini features = vdev->guest_features; 568*ef5bc962SPaolo Bonzini 569*ef5bc962SPaolo Bonzini /* A guest that supports VIRTIO_BLK_F_CONFIG_WCE must be able to send 570*ef5bc962SPaolo Bonzini * cache flushes. Thus, the "auto writethrough" behavior is never 571*ef5bc962SPaolo Bonzini * necessary for guests that support the VIRTIO_BLK_F_CONFIG_WCE feature. 572*ef5bc962SPaolo Bonzini * Leaving it enabled would break the following sequence: 573*ef5bc962SPaolo Bonzini * 574*ef5bc962SPaolo Bonzini * Guest started with "-drive cache=writethrough" 575*ef5bc962SPaolo Bonzini * Guest sets status to 0 576*ef5bc962SPaolo Bonzini * Guest sets DRIVER bit in status field 577*ef5bc962SPaolo Bonzini * Guest reads host features (WCE=0, CONFIG_WCE=1) 578*ef5bc962SPaolo Bonzini * Guest writes guest features (WCE=0, CONFIG_WCE=1) 579*ef5bc962SPaolo Bonzini * Guest writes 1 to the WCE configuration field (writeback mode) 580*ef5bc962SPaolo Bonzini * Guest sets DRIVER_OK bit in status field 581*ef5bc962SPaolo Bonzini * 582*ef5bc962SPaolo Bonzini * s->bs would erroneously be placed in writethrough mode. 583*ef5bc962SPaolo Bonzini */ 584*ef5bc962SPaolo Bonzini if (!(features & (1 << VIRTIO_BLK_F_CONFIG_WCE))) { 5856e790746SPaolo Bonzini bdrv_set_enable_write_cache(s->bs, !!(features & (1 << VIRTIO_BLK_F_WCE))); 5866e790746SPaolo Bonzini } 587*ef5bc962SPaolo Bonzini } 5886e790746SPaolo Bonzini 5896e790746SPaolo Bonzini static void virtio_blk_save(QEMUFile *f, void *opaque) 5906e790746SPaolo Bonzini { 5916e790746SPaolo Bonzini VirtIOBlock *s = opaque; 5926e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 5936e790746SPaolo Bonzini VirtIOBlockReq *req = s->rq; 5946e790746SPaolo Bonzini 5956e790746SPaolo Bonzini virtio_save(vdev, f); 5966e790746SPaolo Bonzini 5976e790746SPaolo Bonzini while (req) { 5986e790746SPaolo Bonzini qemu_put_sbyte(f, 1); 5996e790746SPaolo Bonzini qemu_put_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); 6006e790746SPaolo Bonzini req = req->next; 6016e790746SPaolo Bonzini } 6026e790746SPaolo Bonzini qemu_put_sbyte(f, 0); 6036e790746SPaolo Bonzini } 6046e790746SPaolo Bonzini 6056e790746SPaolo Bonzini static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id) 6066e790746SPaolo Bonzini { 6076e790746SPaolo Bonzini VirtIOBlock *s = opaque; 6086e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 6096e790746SPaolo Bonzini int ret; 6106e790746SPaolo Bonzini 6116e790746SPaolo Bonzini if (version_id != 2) 6126e790746SPaolo Bonzini return -EINVAL; 6136e790746SPaolo Bonzini 6146e790746SPaolo Bonzini ret = virtio_load(vdev, f); 6156e790746SPaolo Bonzini if (ret) { 6166e790746SPaolo Bonzini return ret; 6176e790746SPaolo Bonzini } 6186e790746SPaolo Bonzini 6196e790746SPaolo Bonzini while (qemu_get_sbyte(f)) { 6206e790746SPaolo Bonzini VirtIOBlockReq *req = virtio_blk_alloc_request(s); 6216e790746SPaolo Bonzini qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem)); 6226e790746SPaolo Bonzini req->next = s->rq; 6236e790746SPaolo Bonzini s->rq = req; 6246e790746SPaolo Bonzini 6256e790746SPaolo Bonzini virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr, 6266e790746SPaolo Bonzini req->elem.in_num, 1); 6276e790746SPaolo Bonzini virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr, 6286e790746SPaolo Bonzini req->elem.out_num, 0); 6296e790746SPaolo Bonzini } 6306e790746SPaolo Bonzini 6316e790746SPaolo Bonzini return 0; 6326e790746SPaolo Bonzini } 6336e790746SPaolo Bonzini 6346e790746SPaolo Bonzini static void virtio_blk_resize(void *opaque) 6356e790746SPaolo Bonzini { 6366e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(opaque); 6376e790746SPaolo Bonzini 6386e790746SPaolo Bonzini virtio_notify_config(vdev); 6396e790746SPaolo Bonzini } 6406e790746SPaolo Bonzini 6416e790746SPaolo Bonzini static const BlockDevOps virtio_block_ops = { 6426e790746SPaolo Bonzini .resize_cb = virtio_blk_resize, 6436e790746SPaolo Bonzini }; 6446e790746SPaolo Bonzini 6456e790746SPaolo Bonzini void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk) 6466e790746SPaolo Bonzini { 6476e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(dev); 6486e790746SPaolo Bonzini memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf)); 6496e790746SPaolo Bonzini } 6506e790746SPaolo Bonzini 65184db52d0SStefan Hajnoczi #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 65284db52d0SStefan Hajnoczi /* Disable dataplane thread during live migration since it does not 65384db52d0SStefan Hajnoczi * update the dirty memory bitmap yet. 65484db52d0SStefan Hajnoczi */ 65584db52d0SStefan Hajnoczi static void virtio_blk_migration_state_changed(Notifier *notifier, void *data) 65684db52d0SStefan Hajnoczi { 65784db52d0SStefan Hajnoczi VirtIOBlock *s = container_of(notifier, VirtIOBlock, 65884db52d0SStefan Hajnoczi migration_state_notifier); 65984db52d0SStefan Hajnoczi MigrationState *mig = data; 66084db52d0SStefan Hajnoczi 66184db52d0SStefan Hajnoczi if (migration_in_setup(mig)) { 66284db52d0SStefan Hajnoczi if (!s->dataplane) { 66384db52d0SStefan Hajnoczi return; 66484db52d0SStefan Hajnoczi } 66584db52d0SStefan Hajnoczi virtio_blk_data_plane_destroy(s->dataplane); 66684db52d0SStefan Hajnoczi s->dataplane = NULL; 66784db52d0SStefan Hajnoczi } else if (migration_has_finished(mig) || 66884db52d0SStefan Hajnoczi migration_has_failed(mig)) { 66984db52d0SStefan Hajnoczi if (s->dataplane) { 67084db52d0SStefan Hajnoczi return; 67184db52d0SStefan Hajnoczi } 67284db52d0SStefan Hajnoczi bdrv_drain_all(); /* complete in-flight non-dataplane requests */ 67384db52d0SStefan Hajnoczi virtio_blk_data_plane_create(VIRTIO_DEVICE(s), &s->blk, 67484db52d0SStefan Hajnoczi &s->dataplane); 67584db52d0SStefan Hajnoczi } 67684db52d0SStefan Hajnoczi } 67784db52d0SStefan Hajnoczi #endif /* CONFIG_VIRTIO_BLK_DATA_PLANE */ 67884db52d0SStefan Hajnoczi 6796e790746SPaolo Bonzini static int virtio_blk_device_init(VirtIODevice *vdev) 6806e790746SPaolo Bonzini { 6816e790746SPaolo Bonzini DeviceState *qdev = DEVICE(vdev); 6826e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 6836e790746SPaolo Bonzini VirtIOBlkConf *blk = &(s->blk); 6846e790746SPaolo Bonzini static int virtio_blk_id; 6856e790746SPaolo Bonzini 6866e790746SPaolo Bonzini if (!blk->conf.bs) { 6876e790746SPaolo Bonzini error_report("drive property not set"); 6886e790746SPaolo Bonzini return -1; 6896e790746SPaolo Bonzini } 6906e790746SPaolo Bonzini if (!bdrv_is_inserted(blk->conf.bs)) { 6916e790746SPaolo Bonzini error_report("Device needs media, but drive is empty"); 6926e790746SPaolo Bonzini return -1; 6936e790746SPaolo Bonzini } 6946e790746SPaolo Bonzini 6956e790746SPaolo Bonzini blkconf_serial(&blk->conf, &blk->serial); 696*ef5bc962SPaolo Bonzini s->original_wce = bdrv_enable_write_cache(blk->conf.bs); 6976e790746SPaolo Bonzini if (blkconf_geometry(&blk->conf, NULL, 65535, 255, 255) < 0) { 6986e790746SPaolo Bonzini return -1; 6996e790746SPaolo Bonzini } 7006e790746SPaolo Bonzini 7016e790746SPaolo Bonzini virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK, 7026e790746SPaolo Bonzini sizeof(struct virtio_blk_config)); 7036e790746SPaolo Bonzini 7046e790746SPaolo Bonzini s->bs = blk->conf.bs; 7056e790746SPaolo Bonzini s->conf = &blk->conf; 7066e790746SPaolo Bonzini memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf)); 7076e790746SPaolo Bonzini s->rq = NULL; 7086e790746SPaolo Bonzini s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1; 7096e790746SPaolo Bonzini 7106e790746SPaolo Bonzini s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output); 7116e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 7126e790746SPaolo Bonzini if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) { 7136a1a8cc7SKONRAD Frederic virtio_cleanup(vdev); 7146e790746SPaolo Bonzini return -1; 7156e790746SPaolo Bonzini } 71684db52d0SStefan Hajnoczi s->migration_state_notifier.notify = virtio_blk_migration_state_changed; 71784db52d0SStefan Hajnoczi add_migration_state_change_notifier(&s->migration_state_notifier); 7186e790746SPaolo Bonzini #endif 7196e790746SPaolo Bonzini 7206e790746SPaolo Bonzini s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); 7216e790746SPaolo Bonzini register_savevm(qdev, "virtio-blk", virtio_blk_id++, 2, 7226e790746SPaolo Bonzini virtio_blk_save, virtio_blk_load, s); 7236e790746SPaolo Bonzini bdrv_set_dev_ops(s->bs, &virtio_block_ops, s); 7246e790746SPaolo Bonzini bdrv_set_buffer_alignment(s->bs, s->conf->logical_block_size); 7256e790746SPaolo Bonzini 7266e790746SPaolo Bonzini bdrv_iostatus_enable(s->bs); 7276e790746SPaolo Bonzini 7286e790746SPaolo Bonzini add_boot_device_path(s->conf->bootindex, qdev, "/disk@0,0"); 7296e790746SPaolo Bonzini return 0; 7306e790746SPaolo Bonzini } 7316e790746SPaolo Bonzini 7326e790746SPaolo Bonzini static int virtio_blk_device_exit(DeviceState *dev) 7336e790746SPaolo Bonzini { 7346e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(dev); 7356e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(dev); 7366e790746SPaolo Bonzini #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE 73784db52d0SStefan Hajnoczi remove_migration_state_change_notifier(&s->migration_state_notifier); 7386e790746SPaolo Bonzini virtio_blk_data_plane_destroy(s->dataplane); 7396e790746SPaolo Bonzini s->dataplane = NULL; 7406e790746SPaolo Bonzini #endif 7416e790746SPaolo Bonzini qemu_del_vm_change_state_handler(s->change); 7426e790746SPaolo Bonzini unregister_savevm(dev, "virtio-blk", s); 7436e790746SPaolo Bonzini blockdev_mark_auto_del(s->bs); 7446a1a8cc7SKONRAD Frederic virtio_cleanup(vdev); 7456e790746SPaolo Bonzini return 0; 7466e790746SPaolo Bonzini } 7476e790746SPaolo Bonzini 7486e790746SPaolo Bonzini static Property virtio_blk_properties[] = { 7496e790746SPaolo Bonzini DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlock, blk), 7506e790746SPaolo Bonzini DEFINE_PROP_END_OF_LIST(), 7516e790746SPaolo Bonzini }; 7526e790746SPaolo Bonzini 7536e790746SPaolo Bonzini static void virtio_blk_class_init(ObjectClass *klass, void *data) 7546e790746SPaolo Bonzini { 7556e790746SPaolo Bonzini DeviceClass *dc = DEVICE_CLASS(klass); 7566e790746SPaolo Bonzini VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 7576e790746SPaolo Bonzini dc->exit = virtio_blk_device_exit; 7586e790746SPaolo Bonzini dc->props = virtio_blk_properties; 759125ee0edSMarcel Apfelbaum set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 7606e790746SPaolo Bonzini vdc->init = virtio_blk_device_init; 7616e790746SPaolo Bonzini vdc->get_config = virtio_blk_update_config; 7626e790746SPaolo Bonzini vdc->set_config = virtio_blk_set_config; 7636e790746SPaolo Bonzini vdc->get_features = virtio_blk_get_features; 7646e790746SPaolo Bonzini vdc->set_status = virtio_blk_set_status; 7656e790746SPaolo Bonzini vdc->reset = virtio_blk_reset; 7666e790746SPaolo Bonzini } 7676e790746SPaolo Bonzini 7686e790746SPaolo Bonzini static const TypeInfo virtio_device_info = { 7696e790746SPaolo Bonzini .name = TYPE_VIRTIO_BLK, 7706e790746SPaolo Bonzini .parent = TYPE_VIRTIO_DEVICE, 7716e790746SPaolo Bonzini .instance_size = sizeof(VirtIOBlock), 7726e790746SPaolo Bonzini .class_init = virtio_blk_class_init, 7736e790746SPaolo Bonzini }; 7746e790746SPaolo Bonzini 7756e790746SPaolo Bonzini static void virtio_register_types(void) 7766e790746SPaolo Bonzini { 7776e790746SPaolo Bonzini type_register_static(&virtio_device_info); 7786e790746SPaolo Bonzini } 7796e790746SPaolo Bonzini 7806e790746SPaolo Bonzini type_init(virtio_register_types) 781