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" 15827805a2SFam Zheng #include "qemu/iov.h" 166e790746SPaolo Bonzini #include "qemu/error-report.h" 176e790746SPaolo Bonzini #include "trace.h" 186e790746SPaolo Bonzini #include "hw/block/block.h" 194be74634SMarkus Armbruster #include "sysemu/block-backend.h" 206e790746SPaolo Bonzini #include "sysemu/blockdev.h" 216e790746SPaolo Bonzini #include "hw/virtio/virtio-blk.h" 226e790746SPaolo Bonzini #include "dataplane/virtio-blk.h" 2384db52d0SStefan Hajnoczi #include "migration/migration.h" 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" 29783d1897SRusty Russell #include "hw/virtio/virtio-access.h" 306e790746SPaolo Bonzini 31f897bf75SStefan Hajnoczi VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s) 32671ec3f0SFam Zheng { 33869d66afSStefan Hajnoczi VirtIOBlockReq *req = g_slice_new(VirtIOBlockReq); 34671ec3f0SFam Zheng req->dev = s; 35869d66afSStefan Hajnoczi req->qiov.size = 0; 36869d66afSStefan Hajnoczi req->next = NULL; 37671ec3f0SFam Zheng return req; 38671ec3f0SFam Zheng } 39671ec3f0SFam Zheng 40f897bf75SStefan Hajnoczi void virtio_blk_free_request(VirtIOBlockReq *req) 41671ec3f0SFam Zheng { 42671ec3f0SFam Zheng if (req) { 43671ec3f0SFam Zheng g_slice_free(VirtIOBlockReq, req); 44671ec3f0SFam Zheng } 45671ec3f0SFam Zheng } 46671ec3f0SFam Zheng 47bf4bd461SFam Zheng static void virtio_blk_complete_request(VirtIOBlockReq *req, 48bf4bd461SFam Zheng unsigned char status) 496e790746SPaolo Bonzini { 506e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 516e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 526e790746SPaolo Bonzini 536e790746SPaolo Bonzini trace_virtio_blk_req_complete(req, status); 546e790746SPaolo Bonzini 556e790746SPaolo Bonzini stb_p(&req->in->status, status); 56f897bf75SStefan Hajnoczi virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in)); 576e790746SPaolo Bonzini virtio_notify(vdev, s->vq); 586e790746SPaolo Bonzini } 596e790746SPaolo Bonzini 60bf4bd461SFam Zheng static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) 61bf4bd461SFam Zheng { 62bf4bd461SFam Zheng req->dev->complete_request(req, status); 63bf4bd461SFam Zheng } 64bf4bd461SFam Zheng 656e790746SPaolo Bonzini static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, 666e790746SPaolo Bonzini bool is_read) 676e790746SPaolo Bonzini { 684be74634SMarkus Armbruster BlockErrorAction action = blk_get_error_action(req->dev->blk, 694be74634SMarkus Armbruster is_read, error); 706e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 716e790746SPaolo Bonzini 72a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 736e790746SPaolo Bonzini req->next = s->rq; 746e790746SPaolo Bonzini s->rq = req; 75a589569fSWenchao Xia } else if (action == BLOCK_ERROR_ACTION_REPORT) { 766e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 774be74634SMarkus Armbruster block_acct_done(blk_get_stats(s->blk), &req->acct); 78671ec3f0SFam Zheng virtio_blk_free_request(req); 796e790746SPaolo Bonzini } 806e790746SPaolo Bonzini 814be74634SMarkus Armbruster blk_error_action(s->blk, action, is_read, error); 82a589569fSWenchao Xia return action != BLOCK_ERROR_ACTION_IGNORE; 836e790746SPaolo Bonzini } 846e790746SPaolo Bonzini 856e790746SPaolo Bonzini static void virtio_blk_rw_complete(void *opaque, int ret) 866e790746SPaolo Bonzini { 876e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 886e790746SPaolo Bonzini 896e790746SPaolo Bonzini trace_virtio_blk_rw_complete(req, ret); 906e790746SPaolo Bonzini 916e790746SPaolo Bonzini if (ret) { 92783d1897SRusty Russell int p = virtio_ldl_p(VIRTIO_DEVICE(req->dev), &req->out.type); 93783d1897SRusty Russell bool is_read = !(p & VIRTIO_BLK_T_OUT); 946e790746SPaolo Bonzini if (virtio_blk_handle_rw_error(req, -ret, is_read)) 956e790746SPaolo Bonzini return; 966e790746SPaolo Bonzini } 976e790746SPaolo Bonzini 986e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 994be74634SMarkus Armbruster block_acct_done(blk_get_stats(req->dev->blk), &req->acct); 100671ec3f0SFam Zheng virtio_blk_free_request(req); 1016e790746SPaolo Bonzini } 1026e790746SPaolo Bonzini 1036e790746SPaolo Bonzini static void virtio_blk_flush_complete(void *opaque, int ret) 1046e790746SPaolo Bonzini { 1056e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 1066e790746SPaolo Bonzini 1076e790746SPaolo Bonzini if (ret) { 1086e790746SPaolo Bonzini if (virtio_blk_handle_rw_error(req, -ret, 0)) { 1096e790746SPaolo Bonzini return; 1106e790746SPaolo Bonzini } 1116e790746SPaolo Bonzini } 1126e790746SPaolo Bonzini 1136e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 1144be74634SMarkus Armbruster block_acct_done(blk_get_stats(req->dev->blk), &req->acct); 115671ec3f0SFam Zheng virtio_blk_free_request(req); 1166e790746SPaolo Bonzini } 1176e790746SPaolo Bonzini 1186e790746SPaolo Bonzini static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s) 1196e790746SPaolo Bonzini { 1206e790746SPaolo Bonzini VirtIOBlockReq *req = virtio_blk_alloc_request(s); 1216e790746SPaolo Bonzini 122f897bf75SStefan Hajnoczi if (!virtqueue_pop(s->vq, &req->elem)) { 123671ec3f0SFam Zheng virtio_blk_free_request(req); 1246e790746SPaolo Bonzini return NULL; 1256e790746SPaolo Bonzini } 1266e790746SPaolo Bonzini 1276e790746SPaolo Bonzini return req; 1286e790746SPaolo Bonzini } 1296e790746SPaolo Bonzini 130*75344fa4SFam Zheng static int virtio_blk_handle_scsi_req(VirtIOBlockReq *req) 1316e790746SPaolo Bonzini { 1326e790746SPaolo Bonzini int status = VIRTIO_BLK_S_OK; 1335a05cbeeSFam Zheng struct virtio_scsi_inhdr *scsi = NULL; 134*75344fa4SFam Zheng VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); 135*75344fa4SFam Zheng VirtQueueElement *elem = &req->elem; 136*75344fa4SFam Zheng VirtIOBlock *blk = req->dev; 137783d1897SRusty Russell 1385a05cbeeSFam Zheng #ifdef __linux__ 1395a05cbeeSFam Zheng int i; 1405a05cbeeSFam Zheng struct sg_io_hdr hdr; 1415a05cbeeSFam Zheng #endif 1426e790746SPaolo Bonzini 1436e790746SPaolo Bonzini /* 1446e790746SPaolo Bonzini * We require at least one output segment each for the virtio_blk_outhdr 1456e790746SPaolo Bonzini * and the SCSI command block. 1466e790746SPaolo Bonzini * 1476e790746SPaolo Bonzini * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr 1486e790746SPaolo Bonzini * and the sense buffer pointer in the input segments. 1496e790746SPaolo Bonzini */ 1505a05cbeeSFam Zheng if (elem->out_num < 2 || elem->in_num < 3) { 1515a05cbeeSFam Zheng status = VIRTIO_BLK_S_IOERR; 1525a05cbeeSFam Zheng goto fail; 1536e790746SPaolo Bonzini } 1546e790746SPaolo Bonzini 1556e790746SPaolo Bonzini /* 1566e790746SPaolo Bonzini * The scsi inhdr is placed in the second-to-last input segment, just 1576e790746SPaolo Bonzini * before the regular inhdr. 1586e790746SPaolo Bonzini */ 1595a05cbeeSFam Zheng scsi = (void *)elem->in_sg[elem->in_num - 2].iov_base; 1606e790746SPaolo Bonzini 1612a30307fSMarkus Armbruster if (!blk->conf.scsi) { 1626e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 1636e790746SPaolo Bonzini goto fail; 1646e790746SPaolo Bonzini } 1656e790746SPaolo Bonzini 1666e790746SPaolo Bonzini /* 1676e790746SPaolo Bonzini * No support for bidirection commands yet. 1686e790746SPaolo Bonzini */ 1695a05cbeeSFam Zheng if (elem->out_num > 2 && elem->in_num > 3) { 1706e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 1716e790746SPaolo Bonzini goto fail; 1726e790746SPaolo Bonzini } 1736e790746SPaolo Bonzini 1746e790746SPaolo Bonzini #ifdef __linux__ 1756e790746SPaolo Bonzini memset(&hdr, 0, sizeof(struct sg_io_hdr)); 1766e790746SPaolo Bonzini hdr.interface_id = 'S'; 1775a05cbeeSFam Zheng hdr.cmd_len = elem->out_sg[1].iov_len; 1785a05cbeeSFam Zheng hdr.cmdp = elem->out_sg[1].iov_base; 1796e790746SPaolo Bonzini hdr.dxfer_len = 0; 1806e790746SPaolo Bonzini 1815a05cbeeSFam Zheng if (elem->out_num > 2) { 1826e790746SPaolo Bonzini /* 1836e790746SPaolo Bonzini * If there are more than the minimally required 2 output segments 1846e790746SPaolo Bonzini * there is write payload starting from the third iovec. 1856e790746SPaolo Bonzini */ 1866e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_TO_DEV; 1875a05cbeeSFam Zheng hdr.iovec_count = elem->out_num - 2; 1886e790746SPaolo Bonzini 1896e790746SPaolo Bonzini for (i = 0; i < hdr.iovec_count; i++) 1905a05cbeeSFam Zheng hdr.dxfer_len += elem->out_sg[i + 2].iov_len; 1916e790746SPaolo Bonzini 1925a05cbeeSFam Zheng hdr.dxferp = elem->out_sg + 2; 1936e790746SPaolo Bonzini 1945a05cbeeSFam Zheng } else if (elem->in_num > 3) { 1956e790746SPaolo Bonzini /* 1966e790746SPaolo Bonzini * If we have more than 3 input segments the guest wants to actually 1976e790746SPaolo Bonzini * read data. 1986e790746SPaolo Bonzini */ 1996e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_FROM_DEV; 2005a05cbeeSFam Zheng hdr.iovec_count = elem->in_num - 3; 2016e790746SPaolo Bonzini for (i = 0; i < hdr.iovec_count; i++) 2025a05cbeeSFam Zheng hdr.dxfer_len += elem->in_sg[i].iov_len; 2036e790746SPaolo Bonzini 2045a05cbeeSFam Zheng hdr.dxferp = elem->in_sg; 2056e790746SPaolo Bonzini } else { 2066e790746SPaolo Bonzini /* 2076e790746SPaolo Bonzini * Some SCSI commands don't actually transfer any data. 2086e790746SPaolo Bonzini */ 2096e790746SPaolo Bonzini hdr.dxfer_direction = SG_DXFER_NONE; 2106e790746SPaolo Bonzini } 2116e790746SPaolo Bonzini 2125a05cbeeSFam Zheng hdr.sbp = elem->in_sg[elem->in_num - 3].iov_base; 2135a05cbeeSFam Zheng hdr.mx_sb_len = elem->in_sg[elem->in_num - 3].iov_len; 2146e790746SPaolo Bonzini 2154be74634SMarkus Armbruster status = blk_ioctl(blk->blk, SG_IO, &hdr); 2165a05cbeeSFam Zheng if (status) { 2176e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 2186e790746SPaolo Bonzini goto fail; 2196e790746SPaolo Bonzini } 2206e790746SPaolo Bonzini 2216e790746SPaolo Bonzini /* 2226e790746SPaolo Bonzini * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi) 2236e790746SPaolo Bonzini * clear the masked_status field [hence status gets cleared too, see 2246e790746SPaolo Bonzini * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED 2256e790746SPaolo Bonzini * status has occurred. However they do set DRIVER_SENSE in driver_status 2266e790746SPaolo Bonzini * field. Also a (sb_len_wr > 0) indicates there is a sense buffer. 2276e790746SPaolo Bonzini */ 2286e790746SPaolo Bonzini if (hdr.status == 0 && hdr.sb_len_wr > 0) { 2296e790746SPaolo Bonzini hdr.status = CHECK_CONDITION; 2306e790746SPaolo Bonzini } 2316e790746SPaolo Bonzini 232783d1897SRusty Russell virtio_stl_p(vdev, &scsi->errors, 2336e790746SPaolo Bonzini hdr.status | (hdr.msg_status << 8) | 2346e790746SPaolo Bonzini (hdr.host_status << 16) | (hdr.driver_status << 24)); 235783d1897SRusty Russell virtio_stl_p(vdev, &scsi->residual, hdr.resid); 236783d1897SRusty Russell virtio_stl_p(vdev, &scsi->sense_len, hdr.sb_len_wr); 237783d1897SRusty Russell virtio_stl_p(vdev, &scsi->data_len, hdr.dxfer_len); 2386e790746SPaolo Bonzini 2395a05cbeeSFam Zheng return status; 2406e790746SPaolo Bonzini #else 2416e790746SPaolo Bonzini abort(); 2426e790746SPaolo Bonzini #endif 2436e790746SPaolo Bonzini 2446e790746SPaolo Bonzini fail: 2456e790746SPaolo Bonzini /* Just put anything nonzero so that the ioctl fails in the guest. */ 2465a05cbeeSFam Zheng if (scsi) { 247783d1897SRusty Russell virtio_stl_p(vdev, &scsi->errors, 255); 2485a05cbeeSFam Zheng } 2495a05cbeeSFam Zheng return status; 2505a05cbeeSFam Zheng } 2515a05cbeeSFam Zheng 2525a05cbeeSFam Zheng static void virtio_blk_handle_scsi(VirtIOBlockReq *req) 2535a05cbeeSFam Zheng { 2545a05cbeeSFam Zheng int status; 2555a05cbeeSFam Zheng 256*75344fa4SFam Zheng status = virtio_blk_handle_scsi_req(req); 2576e790746SPaolo Bonzini virtio_blk_req_complete(req, status); 258671ec3f0SFam Zheng virtio_blk_free_request(req); 2596e790746SPaolo Bonzini } 2606e790746SPaolo Bonzini 2614be74634SMarkus Armbruster void virtio_submit_multiwrite(BlockBackend *blk, MultiReqBuffer *mrb) 2626e790746SPaolo Bonzini { 2636e790746SPaolo Bonzini int i, ret; 2646e790746SPaolo Bonzini 2656e790746SPaolo Bonzini if (!mrb->num_writes) { 2666e790746SPaolo Bonzini return; 2676e790746SPaolo Bonzini } 2686e790746SPaolo Bonzini 2694be74634SMarkus Armbruster ret = blk_aio_multiwrite(blk, mrb->blkreq, mrb->num_writes); 2706e790746SPaolo Bonzini if (ret != 0) { 2716e790746SPaolo Bonzini for (i = 0; i < mrb->num_writes; i++) { 2726e790746SPaolo Bonzini if (mrb->blkreq[i].error) { 2736e790746SPaolo Bonzini virtio_blk_rw_complete(mrb->blkreq[i].opaque, -EIO); 2746e790746SPaolo Bonzini } 2756e790746SPaolo Bonzini } 2766e790746SPaolo Bonzini } 2776e790746SPaolo Bonzini 2786e790746SPaolo Bonzini mrb->num_writes = 0; 2796e790746SPaolo Bonzini } 2806e790746SPaolo Bonzini 2816e790746SPaolo Bonzini static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) 2826e790746SPaolo Bonzini { 2834be74634SMarkus Armbruster block_acct_start(blk_get_stats(req->dev->blk), &req->acct, 0, 2845366d0c8SBenoît Canet BLOCK_ACCT_FLUSH); 2856e790746SPaolo Bonzini 2866e790746SPaolo Bonzini /* 2876e790746SPaolo Bonzini * Make sure all outstanding writes are posted to the backing device. 2886e790746SPaolo Bonzini */ 2894be74634SMarkus Armbruster virtio_submit_multiwrite(req->dev->blk, mrb); 2904be74634SMarkus Armbruster blk_aio_flush(req->dev->blk, virtio_blk_flush_complete, req); 2916e790746SPaolo Bonzini } 2926e790746SPaolo Bonzini 293d0e14376SMarkus Armbruster static bool virtio_blk_sect_range_ok(VirtIOBlock *dev, 294d0e14376SMarkus Armbruster uint64_t sector, size_t size) 295d0e14376SMarkus Armbruster { 2963c2daac0SMarkus Armbruster uint64_t nb_sectors = size >> BDRV_SECTOR_BITS; 2973c2daac0SMarkus Armbruster uint64_t total_sectors; 2983c2daac0SMarkus Armbruster 299d0e14376SMarkus Armbruster if (sector & dev->sector_mask) { 300d0e14376SMarkus Armbruster return false; 301d0e14376SMarkus Armbruster } 3022a30307fSMarkus Armbruster if (size % dev->conf.conf.logical_block_size) { 303d0e14376SMarkus Armbruster return false; 304d0e14376SMarkus Armbruster } 3054be74634SMarkus Armbruster blk_get_geometry(dev->blk, &total_sectors); 3063c2daac0SMarkus Armbruster if (sector > total_sectors || nb_sectors > total_sectors - sector) { 3073c2daac0SMarkus Armbruster return false; 3083c2daac0SMarkus Armbruster } 309d0e14376SMarkus Armbruster return true; 310d0e14376SMarkus Armbruster } 311d0e14376SMarkus Armbruster 3126e790746SPaolo Bonzini static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb) 3136e790746SPaolo Bonzini { 3146e790746SPaolo Bonzini BlockRequest *blkreq; 3156e790746SPaolo Bonzini uint64_t sector; 3166e790746SPaolo Bonzini 317783d1897SRusty Russell sector = virtio_ldq_p(VIRTIO_DEVICE(req->dev), &req->out.sector); 3186e790746SPaolo Bonzini 3196e790746SPaolo Bonzini trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512); 3206e790746SPaolo Bonzini 321d0e14376SMarkus Armbruster if (!virtio_blk_sect_range_ok(req->dev, sector, req->qiov.size)) { 32242e38c1fSMarkus Armbruster virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 32342e38c1fSMarkus Armbruster virtio_blk_free_request(req); 3246e790746SPaolo Bonzini return; 3256e790746SPaolo Bonzini } 3266e790746SPaolo Bonzini 3274be74634SMarkus Armbruster block_acct_start(blk_get_stats(req->dev->blk), &req->acct, req->qiov.size, 3285366d0c8SBenoît Canet BLOCK_ACCT_WRITE); 32942e38c1fSMarkus Armbruster 3306e790746SPaolo Bonzini if (mrb->num_writes == 32) { 3314be74634SMarkus Armbruster virtio_submit_multiwrite(req->dev->blk, mrb); 3326e790746SPaolo Bonzini } 3336e790746SPaolo Bonzini 3346e790746SPaolo Bonzini blkreq = &mrb->blkreq[mrb->num_writes]; 3356e790746SPaolo Bonzini blkreq->sector = sector; 3366e790746SPaolo Bonzini blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE; 3376e790746SPaolo Bonzini blkreq->qiov = &req->qiov; 3386e790746SPaolo Bonzini blkreq->cb = virtio_blk_rw_complete; 3396e790746SPaolo Bonzini blkreq->opaque = req; 3406e790746SPaolo Bonzini blkreq->error = 0; 3416e790746SPaolo Bonzini 3426e790746SPaolo Bonzini mrb->num_writes++; 3436e790746SPaolo Bonzini } 3446e790746SPaolo Bonzini 3456e790746SPaolo Bonzini static void virtio_blk_handle_read(VirtIOBlockReq *req) 3466e790746SPaolo Bonzini { 3476e790746SPaolo Bonzini uint64_t sector; 3486e790746SPaolo Bonzini 349783d1897SRusty Russell sector = virtio_ldq_p(VIRTIO_DEVICE(req->dev), &req->out.sector); 3506e790746SPaolo Bonzini 3516e790746SPaolo Bonzini trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512); 3526e790746SPaolo Bonzini 353d0e14376SMarkus Armbruster if (!virtio_blk_sect_range_ok(req->dev, sector, req->qiov.size)) { 35442e38c1fSMarkus Armbruster virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 35542e38c1fSMarkus Armbruster virtio_blk_free_request(req); 3566e790746SPaolo Bonzini return; 3576e790746SPaolo Bonzini } 35842e38c1fSMarkus Armbruster 3594be74634SMarkus Armbruster block_acct_start(blk_get_stats(req->dev->blk), &req->acct, req->qiov.size, 3605366d0c8SBenoît Canet BLOCK_ACCT_READ); 3614be74634SMarkus Armbruster blk_aio_readv(req->dev->blk, sector, &req->qiov, 3626e790746SPaolo Bonzini req->qiov.size / BDRV_SECTOR_SIZE, 3636e790746SPaolo Bonzini virtio_blk_rw_complete, req); 3646e790746SPaolo Bonzini } 3656e790746SPaolo Bonzini 366fee65db7SFam Zheng void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) 3676e790746SPaolo Bonzini { 3686e790746SPaolo Bonzini uint32_t type; 369f897bf75SStefan Hajnoczi struct iovec *in_iov = req->elem.in_sg; 370f897bf75SStefan Hajnoczi struct iovec *iov = req->elem.out_sg; 371f897bf75SStefan Hajnoczi unsigned in_num = req->elem.in_num; 372f897bf75SStefan Hajnoczi unsigned out_num = req->elem.out_num; 3736e790746SPaolo Bonzini 374f897bf75SStefan Hajnoczi if (req->elem.out_num < 1 || req->elem.in_num < 1) { 3756e790746SPaolo Bonzini error_report("virtio-blk missing headers"); 3766e790746SPaolo Bonzini exit(1); 3776e790746SPaolo Bonzini } 3786e790746SPaolo Bonzini 379827805a2SFam Zheng if (unlikely(iov_to_buf(iov, out_num, 0, &req->out, 380827805a2SFam Zheng sizeof(req->out)) != sizeof(req->out))) { 381827805a2SFam Zheng error_report("virtio-blk request outhdr too short"); 382827805a2SFam Zheng exit(1); 383827805a2SFam Zheng } 384ee17e848SFam Zheng 385827805a2SFam Zheng iov_discard_front(&iov, &out_num, sizeof(req->out)); 386ee17e848SFam Zheng 387ee17e848SFam Zheng if (in_num < 1 || 388ee17e848SFam Zheng in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) { 389ee17e848SFam Zheng error_report("virtio-blk request inhdr too short"); 390ee17e848SFam Zheng exit(1); 391ee17e848SFam Zheng } 392ee17e848SFam Zheng 393ee17e848SFam Zheng req->in = (void *)in_iov[in_num - 1].iov_base 394ee17e848SFam Zheng + in_iov[in_num - 1].iov_len 395ee17e848SFam Zheng - sizeof(struct virtio_blk_inhdr); 396ee17e848SFam Zheng iov_discard_back(in_iov, &in_num, sizeof(struct virtio_blk_inhdr)); 3976e790746SPaolo Bonzini 398783d1897SRusty Russell type = virtio_ldl_p(VIRTIO_DEVICE(req->dev), &req->out.type); 3996e790746SPaolo Bonzini 4006e790746SPaolo Bonzini if (type & VIRTIO_BLK_T_FLUSH) { 4016e790746SPaolo Bonzini virtio_blk_handle_flush(req, mrb); 4026e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_SCSI_CMD) { 4036e790746SPaolo Bonzini virtio_blk_handle_scsi(req); 4046e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_GET_ID) { 4056e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 4066e790746SPaolo Bonzini 4076e790746SPaolo Bonzini /* 4086e790746SPaolo Bonzini * NB: per existing s/n string convention the string is 4096e790746SPaolo Bonzini * terminated by '\0' only when shorter than buffer. 4106e790746SPaolo Bonzini */ 4112a30307fSMarkus Armbruster const char *serial = s->conf.serial ? s->conf.serial : ""; 412a83ceea8SMarc Marí size_t size = MIN(strlen(serial) + 1, 413a83ceea8SMarc Marí MIN(iov_size(in_iov, in_num), 414a83ceea8SMarc Marí VIRTIO_BLK_ID_BYTES)); 415a83ceea8SMarc Marí iov_from_buf(in_iov, in_num, 0, serial, size); 4166e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 417671ec3f0SFam Zheng virtio_blk_free_request(req); 4186e790746SPaolo Bonzini } else if (type & VIRTIO_BLK_T_OUT) { 419a83ceea8SMarc Marí qemu_iovec_init_external(&req->qiov, iov, out_num); 4206e790746SPaolo Bonzini virtio_blk_handle_write(req, mrb); 4216e790746SPaolo Bonzini } else if (type == VIRTIO_BLK_T_IN || type == VIRTIO_BLK_T_BARRIER) { 4226e790746SPaolo Bonzini /* VIRTIO_BLK_T_IN is 0, so we can't just & it. */ 423a83ceea8SMarc Marí qemu_iovec_init_external(&req->qiov, in_iov, in_num); 4246e790746SPaolo Bonzini virtio_blk_handle_read(req); 4256e790746SPaolo Bonzini } else { 4266e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); 427671ec3f0SFam Zheng virtio_blk_free_request(req); 4286e790746SPaolo Bonzini } 4296e790746SPaolo Bonzini } 4306e790746SPaolo Bonzini 4316e790746SPaolo Bonzini static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) 4326e790746SPaolo Bonzini { 4336e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 4346e790746SPaolo Bonzini VirtIOBlockReq *req; 4356e790746SPaolo Bonzini MultiReqBuffer mrb = { 4366e790746SPaolo Bonzini .num_writes = 0, 4376e790746SPaolo Bonzini }; 4386e790746SPaolo Bonzini 4396e790746SPaolo Bonzini /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start 4406e790746SPaolo Bonzini * dataplane here instead of waiting for .set_status(). 4416e790746SPaolo Bonzini */ 4426e790746SPaolo Bonzini if (s->dataplane) { 4436e790746SPaolo Bonzini virtio_blk_data_plane_start(s->dataplane); 4446e790746SPaolo Bonzini return; 4456e790746SPaolo Bonzini } 4466e790746SPaolo Bonzini 4476e790746SPaolo Bonzini while ((req = virtio_blk_get_request(s))) { 4486e790746SPaolo Bonzini virtio_blk_handle_request(req, &mrb); 4496e790746SPaolo Bonzini } 4506e790746SPaolo Bonzini 4514be74634SMarkus Armbruster virtio_submit_multiwrite(s->blk, &mrb); 4526e790746SPaolo Bonzini 4536e790746SPaolo Bonzini /* 4546e790746SPaolo Bonzini * FIXME: Want to check for completions before returning to guest mode, 4556e790746SPaolo Bonzini * so cached reads and writes are reported as quickly as possible. But 4566e790746SPaolo Bonzini * that should be done in the generic block layer. 4576e790746SPaolo Bonzini */ 4586e790746SPaolo Bonzini } 4596e790746SPaolo Bonzini 4606e790746SPaolo Bonzini static void virtio_blk_dma_restart_bh(void *opaque) 4616e790746SPaolo Bonzini { 4626e790746SPaolo Bonzini VirtIOBlock *s = opaque; 4636e790746SPaolo Bonzini VirtIOBlockReq *req = s->rq; 4646e790746SPaolo Bonzini MultiReqBuffer mrb = { 4656e790746SPaolo Bonzini .num_writes = 0, 4666e790746SPaolo Bonzini }; 4676e790746SPaolo Bonzini 4686e790746SPaolo Bonzini qemu_bh_delete(s->bh); 4696e790746SPaolo Bonzini s->bh = NULL; 4706e790746SPaolo Bonzini 4716e790746SPaolo Bonzini s->rq = NULL; 4726e790746SPaolo Bonzini 4736e790746SPaolo Bonzini while (req) { 4741bdb176aSzhanghailiang VirtIOBlockReq *next = req->next; 4756e790746SPaolo Bonzini virtio_blk_handle_request(req, &mrb); 4761bdb176aSzhanghailiang req = next; 4776e790746SPaolo Bonzini } 4786e790746SPaolo Bonzini 4794be74634SMarkus Armbruster virtio_submit_multiwrite(s->blk, &mrb); 4806e790746SPaolo Bonzini } 4816e790746SPaolo Bonzini 4826e790746SPaolo Bonzini static void virtio_blk_dma_restart_cb(void *opaque, int running, 4836e790746SPaolo Bonzini RunState state) 4846e790746SPaolo Bonzini { 4856e790746SPaolo Bonzini VirtIOBlock *s = opaque; 4866e790746SPaolo Bonzini 4876e790746SPaolo Bonzini if (!running) { 4886e790746SPaolo Bonzini return; 4896e790746SPaolo Bonzini } 4906e790746SPaolo Bonzini 4916e790746SPaolo Bonzini if (!s->bh) { 4924be74634SMarkus Armbruster s->bh = aio_bh_new(blk_get_aio_context(s->conf.conf.blk), 4934407c1c5SFam Zheng virtio_blk_dma_restart_bh, s); 4946e790746SPaolo Bonzini qemu_bh_schedule(s->bh); 4956e790746SPaolo Bonzini } 4966e790746SPaolo Bonzini } 4976e790746SPaolo Bonzini 4986e790746SPaolo Bonzini static void virtio_blk_reset(VirtIODevice *vdev) 4996e790746SPaolo Bonzini { 5006e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5016e790746SPaolo Bonzini 5026e790746SPaolo Bonzini if (s->dataplane) { 5036e790746SPaolo Bonzini virtio_blk_data_plane_stop(s->dataplane); 5046e790746SPaolo Bonzini } 5056e790746SPaolo Bonzini 5066e790746SPaolo Bonzini /* 5076e790746SPaolo Bonzini * This should cancel pending requests, but can't do nicely until there 5086e790746SPaolo Bonzini * are per-device request lists. 5096e790746SPaolo Bonzini */ 5104be74634SMarkus Armbruster blk_drain_all(); 5114be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, s->original_wce); 5126e790746SPaolo Bonzini } 5136e790746SPaolo Bonzini 5146e790746SPaolo Bonzini /* coalesce internal state, copy to pci i/o region 0 5156e790746SPaolo Bonzini */ 5166e790746SPaolo Bonzini static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) 5176e790746SPaolo Bonzini { 5186e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5192a30307fSMarkus Armbruster BlockConf *conf = &s->conf.conf; 5206e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 5216e790746SPaolo Bonzini uint64_t capacity; 522f7516731SMarkus Armbruster int blk_size = conf->logical_block_size; 5236e790746SPaolo Bonzini 5244be74634SMarkus Armbruster blk_get_geometry(s->blk, &capacity); 5256e790746SPaolo Bonzini memset(&blkcfg, 0, sizeof(blkcfg)); 526783d1897SRusty Russell virtio_stq_p(vdev, &blkcfg.capacity, capacity); 527783d1897SRusty Russell virtio_stl_p(vdev, &blkcfg.seg_max, 128 - 2); 528f7516731SMarkus Armbruster virtio_stw_p(vdev, &blkcfg.cylinders, conf->cyls); 529783d1897SRusty Russell virtio_stl_p(vdev, &blkcfg.blk_size, blk_size); 530f7516731SMarkus Armbruster virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size); 531f7516731SMarkus Armbruster virtio_stw_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size); 532f7516731SMarkus Armbruster blkcfg.heads = conf->heads; 5336e790746SPaolo Bonzini /* 5346e790746SPaolo Bonzini * We must ensure that the block device capacity is a multiple of 535e03ba136SPeter Maydell * the logical block size. If that is not the case, let's use 5366e790746SPaolo Bonzini * sector_mask to adopt the geometry to have a correct picture. 5376e790746SPaolo Bonzini * For those devices where the capacity is ok for the given geometry 538e03ba136SPeter Maydell * we don't touch the sector value of the geometry, since some devices 5396e790746SPaolo Bonzini * (like s390 dasd) need a specific value. Here the capacity is already 5406e790746SPaolo Bonzini * cyls*heads*secs*blk_size and the sector value is not block size 5416e790746SPaolo Bonzini * divided by 512 - instead it is the amount of blk_size blocks 5426e790746SPaolo Bonzini * per track (cylinder). 5436e790746SPaolo Bonzini */ 5444be74634SMarkus Armbruster if (blk_getlength(s->blk) / conf->heads / conf->secs % blk_size) { 545f7516731SMarkus Armbruster blkcfg.sectors = conf->secs & ~s->sector_mask; 5466e790746SPaolo Bonzini } else { 547f7516731SMarkus Armbruster blkcfg.sectors = conf->secs; 5486e790746SPaolo Bonzini } 5496e790746SPaolo Bonzini blkcfg.size_max = 0; 550f7516731SMarkus Armbruster blkcfg.physical_block_exp = get_physical_block_exp(conf); 5516e790746SPaolo Bonzini blkcfg.alignment_offset = 0; 5524be74634SMarkus Armbruster blkcfg.wce = blk_enable_write_cache(s->blk); 5536e790746SPaolo Bonzini memcpy(config, &blkcfg, sizeof(struct virtio_blk_config)); 5546e790746SPaolo Bonzini } 5556e790746SPaolo Bonzini 5566e790746SPaolo Bonzini static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) 5576e790746SPaolo Bonzini { 5586e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5596e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 5606e790746SPaolo Bonzini 5616e790746SPaolo Bonzini memcpy(&blkcfg, config, sizeof(blkcfg)); 5626d7e73d6SFam Zheng 5634be74634SMarkus Armbruster aio_context_acquire(blk_get_aio_context(s->blk)); 5644be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, blkcfg.wce != 0); 5654be74634SMarkus Armbruster aio_context_release(blk_get_aio_context(s->blk)); 5666e790746SPaolo Bonzini } 5676e790746SPaolo Bonzini 5686e790746SPaolo Bonzini static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) 5696e790746SPaolo Bonzini { 5706e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5716e790746SPaolo Bonzini 5726e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_SEG_MAX); 5736e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_GEOMETRY); 5746e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_TOPOLOGY); 5756e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_BLK_SIZE); 5766e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_SCSI); 5776e790746SPaolo Bonzini 5782a30307fSMarkus Armbruster if (s->conf.config_wce) { 5796e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_CONFIG_WCE); 5806e790746SPaolo Bonzini } 5814be74634SMarkus Armbruster if (blk_enable_write_cache(s->blk)) { 5826e790746SPaolo Bonzini features |= (1 << VIRTIO_BLK_F_WCE); 5834be74634SMarkus Armbruster } 5844be74634SMarkus Armbruster if (blk_is_read_only(s->blk)) { 5856e790746SPaolo Bonzini features |= 1 << VIRTIO_BLK_F_RO; 5864be74634SMarkus Armbruster } 5876e790746SPaolo Bonzini 5886e790746SPaolo Bonzini return features; 5896e790746SPaolo Bonzini } 5906e790746SPaolo Bonzini 5916e790746SPaolo Bonzini static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) 5926e790746SPaolo Bonzini { 5936e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 5946e790746SPaolo Bonzini uint32_t features; 5956e790746SPaolo Bonzini 5966e790746SPaolo Bonzini if (s->dataplane && !(status & (VIRTIO_CONFIG_S_DRIVER | 5976e790746SPaolo Bonzini VIRTIO_CONFIG_S_DRIVER_OK))) { 5986e790746SPaolo Bonzini virtio_blk_data_plane_stop(s->dataplane); 5996e790746SPaolo Bonzini } 6006e790746SPaolo Bonzini 6016e790746SPaolo Bonzini if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 6026e790746SPaolo Bonzini return; 6036e790746SPaolo Bonzini } 6046e790746SPaolo Bonzini 6056e790746SPaolo Bonzini features = vdev->guest_features; 606ef5bc962SPaolo Bonzini 607ef5bc962SPaolo Bonzini /* A guest that supports VIRTIO_BLK_F_CONFIG_WCE must be able to send 608ef5bc962SPaolo Bonzini * cache flushes. Thus, the "auto writethrough" behavior is never 609ef5bc962SPaolo Bonzini * necessary for guests that support the VIRTIO_BLK_F_CONFIG_WCE feature. 610ef5bc962SPaolo Bonzini * Leaving it enabled would break the following sequence: 611ef5bc962SPaolo Bonzini * 612ef5bc962SPaolo Bonzini * Guest started with "-drive cache=writethrough" 613ef5bc962SPaolo Bonzini * Guest sets status to 0 614ef5bc962SPaolo Bonzini * Guest sets DRIVER bit in status field 615ef5bc962SPaolo Bonzini * Guest reads host features (WCE=0, CONFIG_WCE=1) 616ef5bc962SPaolo Bonzini * Guest writes guest features (WCE=0, CONFIG_WCE=1) 617ef5bc962SPaolo Bonzini * Guest writes 1 to the WCE configuration field (writeback mode) 618ef5bc962SPaolo Bonzini * Guest sets DRIVER_OK bit in status field 619ef5bc962SPaolo Bonzini * 6204be74634SMarkus Armbruster * s->blk would erroneously be placed in writethrough mode. 621ef5bc962SPaolo Bonzini */ 622ef5bc962SPaolo Bonzini if (!(features & (1 << VIRTIO_BLK_F_CONFIG_WCE))) { 6234be74634SMarkus Armbruster aio_context_acquire(blk_get_aio_context(s->blk)); 6244be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, 6256d7e73d6SFam Zheng !!(features & (1 << VIRTIO_BLK_F_WCE))); 6264be74634SMarkus Armbruster aio_context_release(blk_get_aio_context(s->blk)); 6276e790746SPaolo Bonzini } 628ef5bc962SPaolo Bonzini } 6296e790746SPaolo Bonzini 6306e790746SPaolo Bonzini static void virtio_blk_save(QEMUFile *f, void *opaque) 6316e790746SPaolo Bonzini { 632b2b295a7SGreg Kurz VirtIODevice *vdev = VIRTIO_DEVICE(opaque); 6336e790746SPaolo Bonzini 6346e790746SPaolo Bonzini virtio_save(vdev, f); 635b2b295a7SGreg Kurz } 636b2b295a7SGreg Kurz 637b2b295a7SGreg Kurz static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f) 638b2b295a7SGreg Kurz { 639b2b295a7SGreg Kurz VirtIOBlock *s = VIRTIO_BLK(vdev); 640b2b295a7SGreg Kurz VirtIOBlockReq *req = s->rq; 6416e790746SPaolo Bonzini 6426e790746SPaolo Bonzini while (req) { 6436e790746SPaolo Bonzini qemu_put_sbyte(f, 1); 644f897bf75SStefan Hajnoczi qemu_put_buffer(f, (unsigned char *)&req->elem, 645671ec3f0SFam Zheng sizeof(VirtQueueElement)); 6466e790746SPaolo Bonzini req = req->next; 6476e790746SPaolo Bonzini } 6486e790746SPaolo Bonzini qemu_put_sbyte(f, 0); 6496e790746SPaolo Bonzini } 6506e790746SPaolo Bonzini 6516e790746SPaolo Bonzini static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id) 6526e790746SPaolo Bonzini { 6536e790746SPaolo Bonzini VirtIOBlock *s = opaque; 6546e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 6556e790746SPaolo Bonzini 6566e790746SPaolo Bonzini if (version_id != 2) 6576e790746SPaolo Bonzini return -EINVAL; 6586e790746SPaolo Bonzini 659b2b295a7SGreg Kurz return virtio_load(vdev, f, version_id); 6606e790746SPaolo Bonzini } 6616e790746SPaolo Bonzini 662b2b295a7SGreg Kurz static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f, 663b2b295a7SGreg Kurz int version_id) 664b2b295a7SGreg Kurz { 665b2b295a7SGreg Kurz VirtIOBlock *s = VIRTIO_BLK(vdev); 666b2b295a7SGreg Kurz 6676e790746SPaolo Bonzini while (qemu_get_sbyte(f)) { 6686e790746SPaolo Bonzini VirtIOBlockReq *req = virtio_blk_alloc_request(s); 669f897bf75SStefan Hajnoczi qemu_get_buffer(f, (unsigned char *)&req->elem, 670671ec3f0SFam Zheng sizeof(VirtQueueElement)); 6716e790746SPaolo Bonzini req->next = s->rq; 6726e790746SPaolo Bonzini s->rq = req; 6736e790746SPaolo Bonzini 674f897bf75SStefan Hajnoczi virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr, 675f897bf75SStefan Hajnoczi req->elem.in_num, 1); 676f897bf75SStefan Hajnoczi virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr, 677f897bf75SStefan Hajnoczi req->elem.out_num, 0); 6786e790746SPaolo Bonzini } 6796e790746SPaolo Bonzini 6806e790746SPaolo Bonzini return 0; 6816e790746SPaolo Bonzini } 6826e790746SPaolo Bonzini 6836e790746SPaolo Bonzini static void virtio_blk_resize(void *opaque) 6846e790746SPaolo Bonzini { 6856e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(opaque); 6866e790746SPaolo Bonzini 6876e790746SPaolo Bonzini virtio_notify_config(vdev); 6886e790746SPaolo Bonzini } 6896e790746SPaolo Bonzini 6906e790746SPaolo Bonzini static const BlockDevOps virtio_block_ops = { 6916e790746SPaolo Bonzini .resize_cb = virtio_blk_resize, 6926e790746SPaolo Bonzini }; 6936e790746SPaolo Bonzini 69484db52d0SStefan Hajnoczi /* Disable dataplane thread during live migration since it does not 69584db52d0SStefan Hajnoczi * update the dirty memory bitmap yet. 69684db52d0SStefan Hajnoczi */ 69784db52d0SStefan Hajnoczi static void virtio_blk_migration_state_changed(Notifier *notifier, void *data) 69884db52d0SStefan Hajnoczi { 69984db52d0SStefan Hajnoczi VirtIOBlock *s = container_of(notifier, VirtIOBlock, 70084db52d0SStefan Hajnoczi migration_state_notifier); 70184db52d0SStefan Hajnoczi MigrationState *mig = data; 7023ffeeef7SAndreas Färber Error *err = NULL; 70384db52d0SStefan Hajnoczi 70484db52d0SStefan Hajnoczi if (migration_in_setup(mig)) { 70584db52d0SStefan Hajnoczi if (!s->dataplane) { 70684db52d0SStefan Hajnoczi return; 70784db52d0SStefan Hajnoczi } 70884db52d0SStefan Hajnoczi virtio_blk_data_plane_destroy(s->dataplane); 70984db52d0SStefan Hajnoczi s->dataplane = NULL; 71084db52d0SStefan Hajnoczi } else if (migration_has_finished(mig) || 71184db52d0SStefan Hajnoczi migration_has_failed(mig)) { 71284db52d0SStefan Hajnoczi if (s->dataplane) { 71384db52d0SStefan Hajnoczi return; 71484db52d0SStefan Hajnoczi } 7154be74634SMarkus Armbruster blk_drain_all(); /* complete in-flight non-dataplane requests */ 7162a30307fSMarkus Armbruster virtio_blk_data_plane_create(VIRTIO_DEVICE(s), &s->conf, 7173ffeeef7SAndreas Färber &s->dataplane, &err); 7183ffeeef7SAndreas Färber if (err != NULL) { 7193ffeeef7SAndreas Färber error_report("%s", error_get_pretty(err)); 7203ffeeef7SAndreas Färber error_free(err); 7213ffeeef7SAndreas Färber } 72284db52d0SStefan Hajnoczi } 72384db52d0SStefan Hajnoczi } 72484db52d0SStefan Hajnoczi 72575884afdSAndreas Färber static void virtio_blk_device_realize(DeviceState *dev, Error **errp) 7266e790746SPaolo Bonzini { 72775884afdSAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev); 728179b417eSAndreas Färber VirtIOBlock *s = VIRTIO_BLK(dev); 7292a30307fSMarkus Armbruster VirtIOBlkConf *conf = &s->conf; 7303ffeeef7SAndreas Färber Error *err = NULL; 7316e790746SPaolo Bonzini static int virtio_blk_id; 7326e790746SPaolo Bonzini 7334be74634SMarkus Armbruster if (!conf->conf.blk) { 73475884afdSAndreas Färber error_setg(errp, "drive property not set"); 73575884afdSAndreas Färber return; 7366e790746SPaolo Bonzini } 7374be74634SMarkus Armbruster if (!blk_is_inserted(conf->conf.blk)) { 73875884afdSAndreas Färber error_setg(errp, "Device needs media, but drive is empty"); 73975884afdSAndreas Färber return; 7406e790746SPaolo Bonzini } 7416e790746SPaolo Bonzini 7422a30307fSMarkus Armbruster blkconf_serial(&conf->conf, &conf->serial); 7434be74634SMarkus Armbruster s->original_wce = blk_enable_write_cache(conf->conf.blk); 7442a30307fSMarkus Armbruster blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, &err); 7455ff5efb4SFam Zheng if (err) { 7465ff5efb4SFam Zheng error_propagate(errp, err); 74775884afdSAndreas Färber return; 7486e790746SPaolo Bonzini } 7496e790746SPaolo Bonzini 7506e790746SPaolo Bonzini virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK, 7516e790746SPaolo Bonzini sizeof(struct virtio_blk_config)); 7526e790746SPaolo Bonzini 7534be74634SMarkus Armbruster s->blk = conf->conf.blk; 7546e790746SPaolo Bonzini s->rq = NULL; 7552a30307fSMarkus Armbruster s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1; 7566e790746SPaolo Bonzini 7576e790746SPaolo Bonzini s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output); 758bf4bd461SFam Zheng s->complete_request = virtio_blk_complete_request; 7592a30307fSMarkus Armbruster virtio_blk_data_plane_create(vdev, conf, &s->dataplane, &err); 7603ffeeef7SAndreas Färber if (err != NULL) { 76175884afdSAndreas Färber error_propagate(errp, err); 7626a1a8cc7SKONRAD Frederic virtio_cleanup(vdev); 76375884afdSAndreas Färber return; 7646e790746SPaolo Bonzini } 76584db52d0SStefan Hajnoczi s->migration_state_notifier.notify = virtio_blk_migration_state_changed; 76684db52d0SStefan Hajnoczi add_migration_state_change_notifier(&s->migration_state_notifier); 7676e790746SPaolo Bonzini 7686e790746SPaolo Bonzini s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); 769179b417eSAndreas Färber register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, 7706e790746SPaolo Bonzini virtio_blk_save, virtio_blk_load, s); 7714be74634SMarkus Armbruster blk_set_dev_ops(s->blk, &virtio_block_ops, s); 7724be74634SMarkus Armbruster blk_set_guest_block_size(s->blk, s->conf.conf.logical_block_size); 7736e790746SPaolo Bonzini 7744be74634SMarkus Armbruster blk_iostatus_enable(s->blk); 7756e790746SPaolo Bonzini } 7766e790746SPaolo Bonzini 777306ec6c3SAndreas Färber static void virtio_blk_device_unrealize(DeviceState *dev, Error **errp) 7786e790746SPaolo Bonzini { 779306ec6c3SAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev); 780306ec6c3SAndreas Färber VirtIOBlock *s = VIRTIO_BLK(dev); 781306ec6c3SAndreas Färber 78284db52d0SStefan Hajnoczi remove_migration_state_change_notifier(&s->migration_state_notifier); 7836e790746SPaolo Bonzini virtio_blk_data_plane_destroy(s->dataplane); 7846e790746SPaolo Bonzini s->dataplane = NULL; 7856e790746SPaolo Bonzini qemu_del_vm_change_state_handler(s->change); 786306ec6c3SAndreas Färber unregister_savevm(dev, "virtio-blk", s); 7874be74634SMarkus Armbruster blockdev_mark_auto_del(s->blk); 7886a1a8cc7SKONRAD Frederic virtio_cleanup(vdev); 7896e790746SPaolo Bonzini } 7906e790746SPaolo Bonzini 791467b3f33SStefan Hajnoczi static void virtio_blk_instance_init(Object *obj) 792467b3f33SStefan Hajnoczi { 793467b3f33SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(obj); 794467b3f33SStefan Hajnoczi 795467b3f33SStefan Hajnoczi object_property_add_link(obj, "iothread", TYPE_IOTHREAD, 7962a30307fSMarkus Armbruster (Object **)&s->conf.iothread, 797467b3f33SStefan Hajnoczi qdev_prop_allow_set_link_before_realize, 798467b3f33SStefan Hajnoczi OBJ_PROP_LINK_UNREF_ON_RELEASE, NULL); 7992a30307fSMarkus Armbruster device_add_bootindex_property(obj, &s->conf.conf.bootindex, 8003342ec32SGonglei "bootindex", "/disk@0,0", 8013342ec32SGonglei DEVICE(obj), NULL); 802467b3f33SStefan Hajnoczi } 803467b3f33SStefan Hajnoczi 8046e790746SPaolo Bonzini static Property virtio_blk_properties[] = { 8052a30307fSMarkus Armbruster DEFINE_BLOCK_PROPERTIES(VirtIOBlock, conf.conf), 8062a30307fSMarkus Armbruster DEFINE_BLOCK_CHS_PROPERTIES(VirtIOBlock, conf.conf), 8072a30307fSMarkus Armbruster DEFINE_PROP_STRING("serial", VirtIOBlock, conf.serial), 8082a30307fSMarkus Armbruster DEFINE_PROP_BIT("config-wce", VirtIOBlock, conf.config_wce, 0, true), 80932a877e4SStefan Hajnoczi #ifdef __linux__ 8102a30307fSMarkus Armbruster DEFINE_PROP_BIT("scsi", VirtIOBlock, conf.scsi, 0, true), 81132a877e4SStefan Hajnoczi #endif 8122a30307fSMarkus Armbruster DEFINE_PROP_BIT("x-data-plane", VirtIOBlock, conf.data_plane, 0, false), 8136e790746SPaolo Bonzini DEFINE_PROP_END_OF_LIST(), 8146e790746SPaolo Bonzini }; 8156e790746SPaolo Bonzini 8166e790746SPaolo Bonzini static void virtio_blk_class_init(ObjectClass *klass, void *data) 8176e790746SPaolo Bonzini { 8186e790746SPaolo Bonzini DeviceClass *dc = DEVICE_CLASS(klass); 8196e790746SPaolo Bonzini VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 82075884afdSAndreas Färber 8216e790746SPaolo Bonzini dc->props = virtio_blk_properties; 822125ee0edSMarcel Apfelbaum set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 82375884afdSAndreas Färber vdc->realize = virtio_blk_device_realize; 824306ec6c3SAndreas Färber vdc->unrealize = virtio_blk_device_unrealize; 8256e790746SPaolo Bonzini vdc->get_config = virtio_blk_update_config; 8266e790746SPaolo Bonzini vdc->set_config = virtio_blk_set_config; 8276e790746SPaolo Bonzini vdc->get_features = virtio_blk_get_features; 8286e790746SPaolo Bonzini vdc->set_status = virtio_blk_set_status; 8296e790746SPaolo Bonzini vdc->reset = virtio_blk_reset; 830b2b295a7SGreg Kurz vdc->save = virtio_blk_save_device; 831b2b295a7SGreg Kurz vdc->load = virtio_blk_load_device; 8326e790746SPaolo Bonzini } 8336e790746SPaolo Bonzini 8346e790746SPaolo Bonzini static const TypeInfo virtio_device_info = { 8356e790746SPaolo Bonzini .name = TYPE_VIRTIO_BLK, 8366e790746SPaolo Bonzini .parent = TYPE_VIRTIO_DEVICE, 8376e790746SPaolo Bonzini .instance_size = sizeof(VirtIOBlock), 838467b3f33SStefan Hajnoczi .instance_init = virtio_blk_instance_init, 8396e790746SPaolo Bonzini .class_init = virtio_blk_class_init, 8406e790746SPaolo Bonzini }; 8416e790746SPaolo Bonzini 8426e790746SPaolo Bonzini static void virtio_register_types(void) 8436e790746SPaolo Bonzini { 8446e790746SPaolo Bonzini type_register_static(&virtio_device_info); 8456e790746SPaolo Bonzini } 8466e790746SPaolo Bonzini 8476e790746SPaolo Bonzini type_init(virtio_register_types) 848