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 1480c71a24SPeter Maydell #include "qemu/osdep.h" 15433fcea4SStefan Hajnoczi #include "qemu/defer-call.h" 16da34e65cSMarkus Armbruster #include "qapi/error.h" 17827805a2SFam Zheng #include "qemu/iov.h" 180b8fa32fSMarkus Armbruster #include "qemu/module.h" 196e790746SPaolo Bonzini #include "qemu/error-report.h" 209b92fbcfSSergio Lopez #include "qemu/main-loop.h" 214f736650SSam Li #include "block/block_int.h" 226e790746SPaolo Bonzini #include "trace.h" 236e790746SPaolo Bonzini #include "hw/block/block.h" 24a27bd6c7SMarkus Armbruster #include "hw/qdev-properties.h" 256e790746SPaolo Bonzini #include "sysemu/blockdev.h" 26baf42268SStefan Hajnoczi #include "sysemu/block-ram-registrar.h" 272f780b6aSMarkus Armbruster #include "sysemu/sysemu.h" 2854d31236SMarkus Armbruster #include "sysemu/runstate.h" 296e790746SPaolo Bonzini #include "hw/virtio/virtio-blk.h" 3008e2c9f1SPaolo Bonzini #include "scsi/constants.h" 316e790746SPaolo Bonzini #ifdef __linux__ 326e790746SPaolo Bonzini # include <scsi/sg.h> 336e790746SPaolo Bonzini #endif 346e790746SPaolo Bonzini #include "hw/virtio/virtio-bus.h" 35ca77ee28SMarkus Armbruster #include "migration/qemu-file-types.h" 36783d1897SRusty Russell #include "hw/virtio/virtio-access.h" 37d9cf55a8SDaniil Tatianin #include "hw/virtio/virtio-blk-common.h" 384c41c69eSHiroki Narukawa #include "qemu/coroutine.h" 396e790746SPaolo Bonzini 4052bff01fSHanna Czenczek static void virtio_blk_ioeventfd_attach(VirtIOBlock *s); 4152bff01fSHanna Czenczek 42d14dde5eSGreg Kurz static void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq, 43edaffd9fSStefan Hajnoczi VirtIOBlockReq *req) 44671ec3f0SFam Zheng { 45671ec3f0SFam Zheng req->dev = s; 46edaffd9fSStefan Hajnoczi req->vq = vq; 47869d66afSStefan Hajnoczi req->qiov.size = 0; 482a6cdd6dSPaolo Bonzini req->in_len = 0; 49869d66afSStefan Hajnoczi req->next = NULL; 5095f7142aSPeter Lieven req->mr_next = NULL; 51671ec3f0SFam Zheng } 52671ec3f0SFam Zheng 53d14dde5eSGreg Kurz static void virtio_blk_free_request(VirtIOBlockReq *req) 54671ec3f0SFam Zheng { 55c84b3192SPaolo Bonzini g_free(req); 56671ec3f0SFam Zheng } 57671ec3f0SFam Zheng 5803de2f52SPaolo Bonzini static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) 596e790746SPaolo Bonzini { 606e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 616e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 626e790746SPaolo Bonzini 63a576ceacSStefan Hajnoczi trace_virtio_blk_req_complete(vdev, req, status); 646e790746SPaolo Bonzini 656e790746SPaolo Bonzini stb_p(&req->in->status, status); 667bd04a04SStefan Hajnoczi iov_discard_undo(&req->inhdr_undo); 677bd04a04SStefan Hajnoczi iov_discard_undo(&req->outhdr_undo); 68edaffd9fSStefan Hajnoczi virtqueue_push(req->vq, &req->elem, req->in_len); 69*bfa36802SStefan Hajnoczi if (qemu_in_iothread()) { 703bcc17f0SStefan Hajnoczi virtio_notify_irqfd(vdev, req->vq); 7103de2f52SPaolo Bonzini } else { 72edaffd9fSStefan Hajnoczi virtio_notify(vdev, req->vq); 736e790746SPaolo Bonzini } 74bf4bd461SFam Zheng } 75bf4bd461SFam Zheng 766e790746SPaolo Bonzini static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, 7700f639fbSStefano Garzarella bool is_read, bool acct_failed) 786e790746SPaolo Bonzini { 796e790746SPaolo Bonzini VirtIOBlock *s = req->dev; 809a6719d5SStefano Garzarella BlockErrorAction action = blk_get_error_action(s->blk, is_read, error); 816e790746SPaolo Bonzini 82a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 83466138dcSFam Zheng /* Break the link as the next request is going to be parsed from the 84466138dcSFam Zheng * ring again. Otherwise we may end up doing a double completion! */ 85466138dcSFam Zheng req->mr_next = NULL; 869c67f33fSStefan Hajnoczi 879c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) { 886e790746SPaolo Bonzini req->next = s->rq; 896e790746SPaolo Bonzini s->rq = req; 909c67f33fSStefan Hajnoczi } 91a589569fSWenchao Xia } else if (action == BLOCK_ERROR_ACTION_REPORT) { 926e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 9300f639fbSStefano Garzarella if (acct_failed) { 9401762e03SAlberto Garcia block_acct_failed(blk_get_stats(s->blk), &req->acct); 9500f639fbSStefano Garzarella } 96671ec3f0SFam Zheng virtio_blk_free_request(req); 976e790746SPaolo Bonzini } 986e790746SPaolo Bonzini 994be74634SMarkus Armbruster blk_error_action(s->blk, action, is_read, error); 100a589569fSWenchao Xia return action != BLOCK_ERROR_ACTION_IGNORE; 1016e790746SPaolo Bonzini } 1026e790746SPaolo Bonzini 1036e790746SPaolo Bonzini static void virtio_blk_rw_complete(void *opaque, int ret) 1046e790746SPaolo Bonzini { 10595f7142aSPeter Lieven VirtIOBlockReq *next = opaque; 106b9e413ddSPaolo Bonzini VirtIOBlock *s = next->dev; 107a576ceacSStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s); 1086e790746SPaolo Bonzini 10995f7142aSPeter Lieven while (next) { 11095f7142aSPeter Lieven VirtIOBlockReq *req = next; 11195f7142aSPeter Lieven next = req->mr_next; 112a576ceacSStefan Hajnoczi trace_virtio_blk_rw_complete(vdev, req, ret); 1136e790746SPaolo Bonzini 11495f7142aSPeter Lieven if (req->qiov.nalloc != -1) { 115e61809edSDongli Zhang /* If nalloc is != -1 req->qiov is a local copy of the original 1169bb192a4SYaowei Bai * external iovec. It was allocated in submit_requests to be 1179bb192a4SYaowei Bai * able to merge requests. */ 11895f7142aSPeter Lieven qemu_iovec_destroy(&req->qiov); 11995f7142aSPeter Lieven } 12095f7142aSPeter Lieven 1216e790746SPaolo Bonzini if (ret) { 122bf4069fbSAnastasiia Rusakova int p = virtio_ldl_p(VIRTIO_DEVICE(s), &req->out.type); 123783d1897SRusty Russell bool is_read = !(p & VIRTIO_BLK_T_OUT); 1242a6cdd6dSPaolo Bonzini /* Note that memory may be dirtied on read failure. If the 1252a6cdd6dSPaolo Bonzini * virtio request is not completed here, as is the case for 1262a6cdd6dSPaolo Bonzini * BLOCK_ERROR_ACTION_STOP, the memory may not be copied 1272a6cdd6dSPaolo Bonzini * correctly during live migration. While this is ugly, 1282a6cdd6dSPaolo Bonzini * it is acceptable because the device is free to write to 1292a6cdd6dSPaolo Bonzini * the memory until the request is completed (which will 1302a6cdd6dSPaolo Bonzini * happen on the other side of the migration). 1312a6cdd6dSPaolo Bonzini */ 13200f639fbSStefano Garzarella if (virtio_blk_handle_rw_error(req, -ret, is_read, true)) { 13395f7142aSPeter Lieven continue; 13495f7142aSPeter Lieven } 1356e790746SPaolo Bonzini } 1366e790746SPaolo Bonzini 1376e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 138bf4069fbSAnastasiia Rusakova block_acct_done(blk_get_stats(s->blk), &req->acct); 139671ec3f0SFam Zheng virtio_blk_free_request(req); 1406e790746SPaolo Bonzini } 14195f7142aSPeter Lieven } 1426e790746SPaolo Bonzini 1436e790746SPaolo Bonzini static void virtio_blk_flush_complete(void *opaque, int ret) 1446e790746SPaolo Bonzini { 1456e790746SPaolo Bonzini VirtIOBlockReq *req = opaque; 146b9e413ddSPaolo Bonzini VirtIOBlock *s = req->dev; 1476e790746SPaolo Bonzini 148c1135913SStefan Hajnoczi if (ret && virtio_blk_handle_rw_error(req, -ret, 0, true)) { 149c1135913SStefan Hajnoczi return; 1506e790746SPaolo Bonzini } 1516e790746SPaolo Bonzini 1526e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 1539a6719d5SStefano Garzarella block_acct_done(blk_get_stats(s->blk), &req->acct); 154671ec3f0SFam Zheng virtio_blk_free_request(req); 1556e790746SPaolo Bonzini } 1566e790746SPaolo Bonzini 15737b06f8dSStefano Garzarella static void virtio_blk_discard_write_zeroes_complete(void *opaque, int ret) 15837b06f8dSStefano Garzarella { 15937b06f8dSStefano Garzarella VirtIOBlockReq *req = opaque; 16037b06f8dSStefano Garzarella VirtIOBlock *s = req->dev; 16137b06f8dSStefano Garzarella bool is_write_zeroes = (virtio_ldl_p(VIRTIO_DEVICE(s), &req->out.type) & 16237b06f8dSStefano Garzarella ~VIRTIO_BLK_T_BARRIER) == VIRTIO_BLK_T_WRITE_ZEROES; 16337b06f8dSStefano Garzarella 164c1135913SStefan Hajnoczi if (ret && virtio_blk_handle_rw_error(req, -ret, false, is_write_zeroes)) { 165c1135913SStefan Hajnoczi return; 16637b06f8dSStefano Garzarella } 16737b06f8dSStefano Garzarella 16837b06f8dSStefano Garzarella virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 16937b06f8dSStefano Garzarella if (is_write_zeroes) { 17037b06f8dSStefano Garzarella block_acct_done(blk_get_stats(s->blk), &req->acct); 17137b06f8dSStefano Garzarella } 17237b06f8dSStefano Garzarella virtio_blk_free_request(req); 17337b06f8dSStefano Garzarella } 17437b06f8dSStefano Garzarella 1751dc936aaSFam Zheng #ifdef __linux__ 1761dc936aaSFam Zheng 1771dc936aaSFam Zheng typedef struct { 1781dc936aaSFam Zheng VirtIOBlockReq *req; 1791dc936aaSFam Zheng struct sg_io_hdr hdr; 1801dc936aaSFam Zheng } VirtIOBlockIoctlReq; 1811dc936aaSFam Zheng 1821dc936aaSFam Zheng static void virtio_blk_ioctl_complete(void *opaque, int status) 1831dc936aaSFam Zheng { 1841dc936aaSFam Zheng VirtIOBlockIoctlReq *ioctl_req = opaque; 1851dc936aaSFam Zheng VirtIOBlockReq *req = ioctl_req->req; 1869d456654SPaolo Bonzini VirtIOBlock *s = req->dev; 1879d456654SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(s); 1881dc936aaSFam Zheng struct virtio_scsi_inhdr *scsi; 1891dc936aaSFam Zheng struct sg_io_hdr *hdr; 1901dc936aaSFam Zheng 1911dc936aaSFam Zheng scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base; 1921dc936aaSFam Zheng 1931dc936aaSFam Zheng if (status) { 1941dc936aaSFam Zheng status = VIRTIO_BLK_S_UNSUPP; 1951dc936aaSFam Zheng virtio_stl_p(vdev, &scsi->errors, 255); 1961dc936aaSFam Zheng goto out; 1971dc936aaSFam Zheng } 1981dc936aaSFam Zheng 1991dc936aaSFam Zheng hdr = &ioctl_req->hdr; 2001dc936aaSFam Zheng /* 2011dc936aaSFam Zheng * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi) 2021dc936aaSFam Zheng * clear the masked_status field [hence status gets cleared too, see 2031dc936aaSFam Zheng * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED 2041dc936aaSFam Zheng * status has occurred. However they do set DRIVER_SENSE in driver_status 2051dc936aaSFam Zheng * field. Also a (sb_len_wr > 0) indicates there is a sense buffer. 2061dc936aaSFam Zheng */ 2071dc936aaSFam Zheng if (hdr->status == 0 && hdr->sb_len_wr > 0) { 2081dc936aaSFam Zheng hdr->status = CHECK_CONDITION; 2091dc936aaSFam Zheng } 2101dc936aaSFam Zheng 2111dc936aaSFam Zheng virtio_stl_p(vdev, &scsi->errors, 2121dc936aaSFam Zheng hdr->status | (hdr->msg_status << 8) | 2131dc936aaSFam Zheng (hdr->host_status << 16) | (hdr->driver_status << 24)); 2141dc936aaSFam Zheng virtio_stl_p(vdev, &scsi->residual, hdr->resid); 2151dc936aaSFam Zheng virtio_stl_p(vdev, &scsi->sense_len, hdr->sb_len_wr); 2161dc936aaSFam Zheng virtio_stl_p(vdev, &scsi->data_len, hdr->dxfer_len); 2171dc936aaSFam Zheng 2181dc936aaSFam Zheng out: 2191dc936aaSFam Zheng virtio_blk_req_complete(req, status); 2201dc936aaSFam Zheng virtio_blk_free_request(req); 2211dc936aaSFam Zheng g_free(ioctl_req); 2221dc936aaSFam Zheng } 2231dc936aaSFam Zheng 2241dc936aaSFam Zheng #endif 2251dc936aaSFam Zheng 226edaffd9fSStefan Hajnoczi static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s, VirtQueue *vq) 2276e790746SPaolo Bonzini { 228edaffd9fSStefan Hajnoczi VirtIOBlockReq *req = virtqueue_pop(vq, sizeof(VirtIOBlockReq)); 2296e790746SPaolo Bonzini 23051b19ebeSPaolo Bonzini if (req) { 231edaffd9fSStefan Hajnoczi virtio_blk_init_request(s, vq, req); 2326e790746SPaolo Bonzini } 2336e790746SPaolo Bonzini return req; 2346e790746SPaolo Bonzini } 2356e790746SPaolo Bonzini 23675344fa4SFam Zheng static int virtio_blk_handle_scsi_req(VirtIOBlockReq *req) 2376e790746SPaolo Bonzini { 2386e790746SPaolo Bonzini int status = VIRTIO_BLK_S_OK; 2395a05cbeeSFam Zheng struct virtio_scsi_inhdr *scsi = NULL; 24075344fa4SFam Zheng VirtIOBlock *blk = req->dev; 241bf4069fbSAnastasiia Rusakova VirtIODevice *vdev = VIRTIO_DEVICE(blk); 242bf4069fbSAnastasiia Rusakova VirtQueueElement *elem = &req->elem; 243783d1897SRusty Russell 2445a05cbeeSFam Zheng #ifdef __linux__ 2455a05cbeeSFam Zheng int i; 2461dc936aaSFam Zheng VirtIOBlockIoctlReq *ioctl_req; 247a209f461SFam Zheng BlockAIOCB *acb; 2485a05cbeeSFam Zheng #endif 2496e790746SPaolo Bonzini 2506e790746SPaolo Bonzini /* 2516e790746SPaolo Bonzini * We require at least one output segment each for the virtio_blk_outhdr 2526e790746SPaolo Bonzini * and the SCSI command block. 2536e790746SPaolo Bonzini * 2546e790746SPaolo Bonzini * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr 2556e790746SPaolo Bonzini * and the sense buffer pointer in the input segments. 2566e790746SPaolo Bonzini */ 2575a05cbeeSFam Zheng if (elem->out_num < 2 || elem->in_num < 3) { 2585a05cbeeSFam Zheng status = VIRTIO_BLK_S_IOERR; 2595a05cbeeSFam Zheng goto fail; 2606e790746SPaolo Bonzini } 2616e790746SPaolo Bonzini 2626e790746SPaolo Bonzini /* 2636e790746SPaolo Bonzini * The scsi inhdr is placed in the second-to-last input segment, just 2646e790746SPaolo Bonzini * before the regular inhdr. 2656e790746SPaolo Bonzini */ 2665a05cbeeSFam Zheng scsi = (void *)elem->in_sg[elem->in_num - 2].iov_base; 2676e790746SPaolo Bonzini 268bbe8bd4dSStefano Garzarella if (!virtio_has_feature(blk->host_features, VIRTIO_BLK_F_SCSI)) { 2696e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 2706e790746SPaolo Bonzini goto fail; 2716e790746SPaolo Bonzini } 2726e790746SPaolo Bonzini 2736e790746SPaolo Bonzini /* 2746e790746SPaolo Bonzini * No support for bidirection commands yet. 2756e790746SPaolo Bonzini */ 2765a05cbeeSFam Zheng if (elem->out_num > 2 && elem->in_num > 3) { 2776e790746SPaolo Bonzini status = VIRTIO_BLK_S_UNSUPP; 2786e790746SPaolo Bonzini goto fail; 2796e790746SPaolo Bonzini } 2806e790746SPaolo Bonzini 2816e790746SPaolo Bonzini #ifdef __linux__ 2821dc936aaSFam Zheng ioctl_req = g_new0(VirtIOBlockIoctlReq, 1); 2831dc936aaSFam Zheng ioctl_req->req = req; 2841dc936aaSFam Zheng ioctl_req->hdr.interface_id = 'S'; 2851dc936aaSFam Zheng ioctl_req->hdr.cmd_len = elem->out_sg[1].iov_len; 2861dc936aaSFam Zheng ioctl_req->hdr.cmdp = elem->out_sg[1].iov_base; 2871dc936aaSFam Zheng ioctl_req->hdr.dxfer_len = 0; 2886e790746SPaolo Bonzini 2895a05cbeeSFam Zheng if (elem->out_num > 2) { 2906e790746SPaolo Bonzini /* 2916e790746SPaolo Bonzini * If there are more than the minimally required 2 output segments 2926e790746SPaolo Bonzini * there is write payload starting from the third iovec. 2936e790746SPaolo Bonzini */ 2941dc936aaSFam Zheng ioctl_req->hdr.dxfer_direction = SG_DXFER_TO_DEV; 2951dc936aaSFam Zheng ioctl_req->hdr.iovec_count = elem->out_num - 2; 2966e790746SPaolo Bonzini 2971dc936aaSFam Zheng for (i = 0; i < ioctl_req->hdr.iovec_count; i++) { 2981dc936aaSFam Zheng ioctl_req->hdr.dxfer_len += elem->out_sg[i + 2].iov_len; 2991dc936aaSFam Zheng } 3006e790746SPaolo Bonzini 3011dc936aaSFam Zheng ioctl_req->hdr.dxferp = elem->out_sg + 2; 3026e790746SPaolo Bonzini 3035a05cbeeSFam Zheng } else if (elem->in_num > 3) { 3046e790746SPaolo Bonzini /* 3056e790746SPaolo Bonzini * If we have more than 3 input segments the guest wants to actually 3066e790746SPaolo Bonzini * read data. 3076e790746SPaolo Bonzini */ 3081dc936aaSFam Zheng ioctl_req->hdr.dxfer_direction = SG_DXFER_FROM_DEV; 3091dc936aaSFam Zheng ioctl_req->hdr.iovec_count = elem->in_num - 3; 3101dc936aaSFam Zheng for (i = 0; i < ioctl_req->hdr.iovec_count; i++) { 3111dc936aaSFam Zheng ioctl_req->hdr.dxfer_len += elem->in_sg[i].iov_len; 3121dc936aaSFam Zheng } 3136e790746SPaolo Bonzini 3141dc936aaSFam Zheng ioctl_req->hdr.dxferp = elem->in_sg; 3156e790746SPaolo Bonzini } else { 3166e790746SPaolo Bonzini /* 3176e790746SPaolo Bonzini * Some SCSI commands don't actually transfer any data. 3186e790746SPaolo Bonzini */ 3191dc936aaSFam Zheng ioctl_req->hdr.dxfer_direction = SG_DXFER_NONE; 3206e790746SPaolo Bonzini } 3216e790746SPaolo Bonzini 3221dc936aaSFam Zheng ioctl_req->hdr.sbp = elem->in_sg[elem->in_num - 3].iov_base; 3231dc936aaSFam Zheng ioctl_req->hdr.mx_sb_len = elem->in_sg[elem->in_num - 3].iov_len; 3246e790746SPaolo Bonzini 325a209f461SFam Zheng acb = blk_aio_ioctl(blk->blk, SG_IO, &ioctl_req->hdr, 3261dc936aaSFam Zheng virtio_blk_ioctl_complete, ioctl_req); 327a209f461SFam Zheng if (!acb) { 328a209f461SFam Zheng g_free(ioctl_req); 329a209f461SFam Zheng status = VIRTIO_BLK_S_UNSUPP; 330a209f461SFam Zheng goto fail; 331a209f461SFam Zheng } 3321dc936aaSFam Zheng return -EINPROGRESS; 3336e790746SPaolo Bonzini #else 3346e790746SPaolo Bonzini abort(); 3356e790746SPaolo Bonzini #endif 3366e790746SPaolo Bonzini 3376e790746SPaolo Bonzini fail: 3386e790746SPaolo Bonzini /* Just put anything nonzero so that the ioctl fails in the guest. */ 3395a05cbeeSFam Zheng if (scsi) { 340783d1897SRusty Russell virtio_stl_p(vdev, &scsi->errors, 255); 3415a05cbeeSFam Zheng } 3425a05cbeeSFam Zheng return status; 3435a05cbeeSFam Zheng } 3445a05cbeeSFam Zheng 3455a05cbeeSFam Zheng static void virtio_blk_handle_scsi(VirtIOBlockReq *req) 3465a05cbeeSFam Zheng { 3475a05cbeeSFam Zheng int status; 3485a05cbeeSFam Zheng 34975344fa4SFam Zheng status = virtio_blk_handle_scsi_req(req); 3501dc936aaSFam Zheng if (status != -EINPROGRESS) { 3516e790746SPaolo Bonzini virtio_blk_req_complete(req, status); 352671ec3f0SFam Zheng virtio_blk_free_request(req); 3536e790746SPaolo Bonzini } 3541dc936aaSFam Zheng } 3556e790746SPaolo Bonzini 356baf42268SStefan Hajnoczi static inline void submit_requests(VirtIOBlock *s, MultiReqBuffer *mrb, 35795f7142aSPeter Lieven int start, int num_reqs, int niov) 3586e790746SPaolo Bonzini { 359baf42268SStefan Hajnoczi BlockBackend *blk = s->blk; 36095f7142aSPeter Lieven QEMUIOVector *qiov = &mrb->reqs[start]->qiov; 36195f7142aSPeter Lieven int64_t sector_num = mrb->reqs[start]->sector_num; 36295f7142aSPeter Lieven bool is_write = mrb->is_write; 363baf42268SStefan Hajnoczi BdrvRequestFlags flags = 0; 3646e790746SPaolo Bonzini 36595f7142aSPeter Lieven if (num_reqs > 1) { 36695f7142aSPeter Lieven int i; 36795f7142aSPeter Lieven struct iovec *tmp_iov = qiov->iov; 36895f7142aSPeter Lieven int tmp_niov = qiov->niov; 36995f7142aSPeter Lieven 37095f7142aSPeter Lieven /* mrb->reqs[start]->qiov was initialized from external so we can't 371b5772fddSEric Blake * modify it here. We need to initialize it locally and then add the 37295f7142aSPeter Lieven * external iovecs. */ 37395f7142aSPeter Lieven qemu_iovec_init(qiov, niov); 37495f7142aSPeter Lieven 37595f7142aSPeter Lieven for (i = 0; i < tmp_niov; i++) { 37695f7142aSPeter Lieven qemu_iovec_add(qiov, tmp_iov[i].iov_base, tmp_iov[i].iov_len); 37795f7142aSPeter Lieven } 37895f7142aSPeter Lieven 37995f7142aSPeter Lieven for (i = start + 1; i < start + num_reqs; i++) { 38095f7142aSPeter Lieven qemu_iovec_concat(qiov, &mrb->reqs[i]->qiov, 0, 38195f7142aSPeter Lieven mrb->reqs[i]->qiov.size); 38295f7142aSPeter Lieven mrb->reqs[i - 1]->mr_next = mrb->reqs[i]; 38395f7142aSPeter Lieven } 38495f7142aSPeter Lieven 385a576ceacSStefan Hajnoczi trace_virtio_blk_submit_multireq(VIRTIO_DEVICE(mrb->reqs[start]->dev), 386a576ceacSStefan Hajnoczi mrb, start, num_reqs, 387b5772fddSEric Blake sector_num << BDRV_SECTOR_BITS, 388b5772fddSEric Blake qiov->size, is_write); 38995f7142aSPeter Lieven block_acct_merge_done(blk_get_stats(blk), 39095f7142aSPeter Lieven is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ, 39195f7142aSPeter Lieven num_reqs - 1); 39295f7142aSPeter Lieven } 39395f7142aSPeter Lieven 394baf42268SStefan Hajnoczi if (blk_ram_registrar_ok(&s->blk_ram_registrar)) { 395baf42268SStefan Hajnoczi flags |= BDRV_REQ_REGISTERED_BUF; 396baf42268SStefan Hajnoczi } 397baf42268SStefan Hajnoczi 39895f7142aSPeter Lieven if (is_write) { 399baf42268SStefan Hajnoczi blk_aio_pwritev(blk, sector_num << BDRV_SECTOR_BITS, qiov, 400baf42268SStefan Hajnoczi flags, virtio_blk_rw_complete, 401baf42268SStefan Hajnoczi mrb->reqs[start]); 40295f7142aSPeter Lieven } else { 403baf42268SStefan Hajnoczi blk_aio_preadv(blk, sector_num << BDRV_SECTOR_BITS, qiov, 404baf42268SStefan Hajnoczi flags, virtio_blk_rw_complete, 405baf42268SStefan Hajnoczi mrb->reqs[start]); 40695f7142aSPeter Lieven } 40795f7142aSPeter Lieven } 40895f7142aSPeter Lieven 40995f7142aSPeter Lieven static int multireq_compare(const void *a, const void *b) 41095f7142aSPeter Lieven { 41195f7142aSPeter Lieven const VirtIOBlockReq *req1 = *(VirtIOBlockReq **)a, 41295f7142aSPeter Lieven *req2 = *(VirtIOBlockReq **)b; 41395f7142aSPeter Lieven 41495f7142aSPeter Lieven /* 41595f7142aSPeter Lieven * Note that we can't simply subtract sector_num1 from sector_num2 41695f7142aSPeter Lieven * here as that could overflow the return value. 41795f7142aSPeter Lieven */ 41895f7142aSPeter Lieven if (req1->sector_num > req2->sector_num) { 41995f7142aSPeter Lieven return 1; 42095f7142aSPeter Lieven } else if (req1->sector_num < req2->sector_num) { 42195f7142aSPeter Lieven return -1; 42295f7142aSPeter Lieven } else { 42395f7142aSPeter Lieven return 0; 42495f7142aSPeter Lieven } 42595f7142aSPeter Lieven } 42695f7142aSPeter Lieven 427baf42268SStefan Hajnoczi static void virtio_blk_submit_multireq(VirtIOBlock *s, MultiReqBuffer *mrb) 42895f7142aSPeter Lieven { 42995f7142aSPeter Lieven int i = 0, start = 0, num_reqs = 0, niov = 0, nb_sectors = 0; 4305def6b80SEric Blake uint32_t max_transfer; 43195f7142aSPeter Lieven int64_t sector_num = 0; 43295f7142aSPeter Lieven 43395f7142aSPeter Lieven if (mrb->num_reqs == 1) { 434baf42268SStefan Hajnoczi submit_requests(s, mrb, 0, 1, -1); 43595f7142aSPeter Lieven mrb->num_reqs = 0; 4366e790746SPaolo Bonzini return; 4376e790746SPaolo Bonzini } 4386e790746SPaolo Bonzini 4395def6b80SEric Blake max_transfer = blk_get_max_transfer(mrb->reqs[0]->dev->blk); 44095f7142aSPeter Lieven 44195f7142aSPeter Lieven qsort(mrb->reqs, mrb->num_reqs, sizeof(*mrb->reqs), 44295f7142aSPeter Lieven &multireq_compare); 44395f7142aSPeter Lieven 44495f7142aSPeter Lieven for (i = 0; i < mrb->num_reqs; i++) { 44595f7142aSPeter Lieven VirtIOBlockReq *req = mrb->reqs[i]; 44695f7142aSPeter Lieven if (num_reqs > 0) { 44749cffbc6SGonglei /* 44849cffbc6SGonglei * NOTE: We cannot merge the requests in below situations: 44949cffbc6SGonglei * 1. requests are not sequential 45049cffbc6SGonglei * 2. merge would exceed maximum number of IOVs 45149cffbc6SGonglei * 3. merge would exceed maximum transfer length of backend device 45249cffbc6SGonglei */ 45349cffbc6SGonglei if (sector_num + nb_sectors != req->sector_num || 454baf42268SStefan Hajnoczi niov > blk_get_max_iov(s->blk) - req->qiov.niov || 4555def6b80SEric Blake req->qiov.size > max_transfer || 4565def6b80SEric Blake nb_sectors > (max_transfer - 4575def6b80SEric Blake req->qiov.size) / BDRV_SECTOR_SIZE) { 458baf42268SStefan Hajnoczi submit_requests(s, mrb, start, num_reqs, niov); 45995f7142aSPeter Lieven num_reqs = 0; 4606e790746SPaolo Bonzini } 4616e790746SPaolo Bonzini } 4626e790746SPaolo Bonzini 46395f7142aSPeter Lieven if (num_reqs == 0) { 46495f7142aSPeter Lieven sector_num = req->sector_num; 46595f7142aSPeter Lieven nb_sectors = niov = 0; 46695f7142aSPeter Lieven start = i; 46795f7142aSPeter Lieven } 46895f7142aSPeter Lieven 46995f7142aSPeter Lieven nb_sectors += req->qiov.size / BDRV_SECTOR_SIZE; 47095f7142aSPeter Lieven niov += req->qiov.niov; 47195f7142aSPeter Lieven num_reqs++; 47295f7142aSPeter Lieven } 47395f7142aSPeter Lieven 474baf42268SStefan Hajnoczi submit_requests(s, mrb, start, num_reqs, niov); 47595f7142aSPeter Lieven mrb->num_reqs = 0; 4766e790746SPaolo Bonzini } 4776e790746SPaolo Bonzini 4786e790746SPaolo Bonzini static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb) 4796e790746SPaolo Bonzini { 480bf4069fbSAnastasiia Rusakova VirtIOBlock *s = req->dev; 481bf4069fbSAnastasiia Rusakova 482bf4069fbSAnastasiia Rusakova block_acct_start(blk_get_stats(s->blk), &req->acct, 0, 4835366d0c8SBenoît Canet BLOCK_ACCT_FLUSH); 4846e790746SPaolo Bonzini 4856e790746SPaolo Bonzini /* 4866e790746SPaolo Bonzini * Make sure all outstanding writes are posted to the backing device. 4876e790746SPaolo Bonzini */ 48895f7142aSPeter Lieven if (mrb->is_write && mrb->num_reqs > 0) { 489baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, mrb); 49095f7142aSPeter Lieven } 491bf4069fbSAnastasiia Rusakova blk_aio_flush(s->blk, virtio_blk_flush_complete, req); 4926e790746SPaolo Bonzini } 4936e790746SPaolo Bonzini 494d0e14376SMarkus Armbruster static bool virtio_blk_sect_range_ok(VirtIOBlock *dev, 495d0e14376SMarkus Armbruster uint64_t sector, size_t size) 496d0e14376SMarkus Armbruster { 4973c2daac0SMarkus Armbruster uint64_t nb_sectors = size >> BDRV_SECTOR_BITS; 4983c2daac0SMarkus Armbruster uint64_t total_sectors; 4993c2daac0SMarkus Armbruster 50075af1f34SPeter Lieven if (nb_sectors > BDRV_REQUEST_MAX_SECTORS) { 50195f7142aSPeter Lieven return false; 50295f7142aSPeter Lieven } 503d0e14376SMarkus Armbruster if (sector & dev->sector_mask) { 504d0e14376SMarkus Armbruster return false; 505d0e14376SMarkus Armbruster } 5062a30307fSMarkus Armbruster if (size % dev->conf.conf.logical_block_size) { 507d0e14376SMarkus Armbruster return false; 508d0e14376SMarkus Armbruster } 5094be74634SMarkus Armbruster blk_get_geometry(dev->blk, &total_sectors); 5103c2daac0SMarkus Armbruster if (sector > total_sectors || nb_sectors > total_sectors - sector) { 5113c2daac0SMarkus Armbruster return false; 5123c2daac0SMarkus Armbruster } 513d0e14376SMarkus Armbruster return true; 514d0e14376SMarkus Armbruster } 515d0e14376SMarkus Armbruster 51637b06f8dSStefano Garzarella static uint8_t virtio_blk_handle_discard_write_zeroes(VirtIOBlockReq *req, 51737b06f8dSStefano Garzarella struct virtio_blk_discard_write_zeroes *dwz_hdr, bool is_write_zeroes) 51837b06f8dSStefano Garzarella { 51937b06f8dSStefano Garzarella VirtIOBlock *s = req->dev; 52037b06f8dSStefano Garzarella VirtIODevice *vdev = VIRTIO_DEVICE(s); 52137b06f8dSStefano Garzarella uint64_t sector; 52237b06f8dSStefano Garzarella uint32_t num_sectors, flags, max_sectors; 52337b06f8dSStefano Garzarella uint8_t err_status; 52437b06f8dSStefano Garzarella int bytes; 52537b06f8dSStefano Garzarella 52637b06f8dSStefano Garzarella sector = virtio_ldq_p(vdev, &dwz_hdr->sector); 52737b06f8dSStefano Garzarella num_sectors = virtio_ldl_p(vdev, &dwz_hdr->num_sectors); 52837b06f8dSStefano Garzarella flags = virtio_ldl_p(vdev, &dwz_hdr->flags); 52937b06f8dSStefano Garzarella max_sectors = is_write_zeroes ? s->conf.max_write_zeroes_sectors : 53037b06f8dSStefano Garzarella s->conf.max_discard_sectors; 53137b06f8dSStefano Garzarella 53237b06f8dSStefano Garzarella /* 53337b06f8dSStefano Garzarella * max_sectors is at most BDRV_REQUEST_MAX_SECTORS, this check 53437b06f8dSStefano Garzarella * make us sure that "num_sectors << BDRV_SECTOR_BITS" can fit in 53537b06f8dSStefano Garzarella * the integer variable. 53637b06f8dSStefano Garzarella */ 53737b06f8dSStefano Garzarella if (unlikely(num_sectors > max_sectors)) { 53837b06f8dSStefano Garzarella err_status = VIRTIO_BLK_S_IOERR; 53937b06f8dSStefano Garzarella goto err; 54037b06f8dSStefano Garzarella } 54137b06f8dSStefano Garzarella 54237b06f8dSStefano Garzarella bytes = num_sectors << BDRV_SECTOR_BITS; 54337b06f8dSStefano Garzarella 54437b06f8dSStefano Garzarella if (unlikely(!virtio_blk_sect_range_ok(s, sector, bytes))) { 54537b06f8dSStefano Garzarella err_status = VIRTIO_BLK_S_IOERR; 54637b06f8dSStefano Garzarella goto err; 54737b06f8dSStefano Garzarella } 54837b06f8dSStefano Garzarella 54937b06f8dSStefano Garzarella /* 55037b06f8dSStefano Garzarella * The device MUST set the status byte to VIRTIO_BLK_S_UNSUPP for discard 55137b06f8dSStefano Garzarella * and write zeroes commands if any unknown flag is set. 55237b06f8dSStefano Garzarella */ 55337b06f8dSStefano Garzarella if (unlikely(flags & ~VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP)) { 55437b06f8dSStefano Garzarella err_status = VIRTIO_BLK_S_UNSUPP; 55537b06f8dSStefano Garzarella goto err; 55637b06f8dSStefano Garzarella } 55737b06f8dSStefano Garzarella 55837b06f8dSStefano Garzarella if (is_write_zeroes) { /* VIRTIO_BLK_T_WRITE_ZEROES */ 55937b06f8dSStefano Garzarella int blk_aio_flags = 0; 56037b06f8dSStefano Garzarella 56137b06f8dSStefano Garzarella if (flags & VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP) { 56237b06f8dSStefano Garzarella blk_aio_flags |= BDRV_REQ_MAY_UNMAP; 56337b06f8dSStefano Garzarella } 56437b06f8dSStefano Garzarella 56537b06f8dSStefano Garzarella block_acct_start(blk_get_stats(s->blk), &req->acct, bytes, 56637b06f8dSStefano Garzarella BLOCK_ACCT_WRITE); 56737b06f8dSStefano Garzarella 56837b06f8dSStefano Garzarella blk_aio_pwrite_zeroes(s->blk, sector << BDRV_SECTOR_BITS, 56937b06f8dSStefano Garzarella bytes, blk_aio_flags, 57037b06f8dSStefano Garzarella virtio_blk_discard_write_zeroes_complete, req); 57137b06f8dSStefano Garzarella } else { /* VIRTIO_BLK_T_DISCARD */ 57237b06f8dSStefano Garzarella /* 57337b06f8dSStefano Garzarella * The device MUST set the status byte to VIRTIO_BLK_S_UNSUPP for 57437b06f8dSStefano Garzarella * discard commands if the unmap flag is set. 57537b06f8dSStefano Garzarella */ 57637b06f8dSStefano Garzarella if (unlikely(flags & VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP)) { 57737b06f8dSStefano Garzarella err_status = VIRTIO_BLK_S_UNSUPP; 57837b06f8dSStefano Garzarella goto err; 57937b06f8dSStefano Garzarella } 58037b06f8dSStefano Garzarella 58137b06f8dSStefano Garzarella blk_aio_pdiscard(s->blk, sector << BDRV_SECTOR_BITS, bytes, 58237b06f8dSStefano Garzarella virtio_blk_discard_write_zeroes_complete, req); 58337b06f8dSStefano Garzarella } 58437b06f8dSStefano Garzarella 58537b06f8dSStefano Garzarella return VIRTIO_BLK_S_OK; 58637b06f8dSStefano Garzarella 58737b06f8dSStefano Garzarella err: 58837b06f8dSStefano Garzarella if (is_write_zeroes) { 58937b06f8dSStefano Garzarella block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_WRITE); 59037b06f8dSStefano Garzarella } 59137b06f8dSStefano Garzarella return err_status; 59237b06f8dSStefano Garzarella } 59337b06f8dSStefano Garzarella 5944f736650SSam Li typedef struct ZoneCmdData { 5954f736650SSam Li VirtIOBlockReq *req; 5964f736650SSam Li struct iovec *in_iov; 5974f736650SSam Li unsigned in_num; 5984f736650SSam Li union { 5994f736650SSam Li struct { 6004f736650SSam Li unsigned int nr_zones; 6014f736650SSam Li BlockZoneDescriptor *zones; 6024f736650SSam Li } zone_report_data; 6034f736650SSam Li struct { 6044f736650SSam Li int64_t offset; 6054f736650SSam Li } zone_append_data; 6064f736650SSam Li }; 6074f736650SSam Li } ZoneCmdData; 6084f736650SSam Li 6094f736650SSam Li /* 6104f736650SSam Li * check zoned_request: error checking before issuing requests. If all checks 6114f736650SSam Li * passed, return true. 6124f736650SSam Li * append: true if only zone append requests issued. 6134f736650SSam Li */ 6144f736650SSam Li static bool check_zoned_request(VirtIOBlock *s, int64_t offset, int64_t len, 6154f736650SSam Li bool append, uint8_t *status) { 6164f736650SSam Li BlockDriverState *bs = blk_bs(s->blk); 6174f736650SSam Li int index; 6184f736650SSam Li 6194f736650SSam Li if (!virtio_has_feature(s->host_features, VIRTIO_BLK_F_ZONED)) { 6204f736650SSam Li *status = VIRTIO_BLK_S_UNSUPP; 6214f736650SSam Li return false; 6224f736650SSam Li } 6234f736650SSam Li 6244f736650SSam Li if (offset < 0 || len < 0 || len > (bs->total_sectors << BDRV_SECTOR_BITS) 6254f736650SSam Li || offset > (bs->total_sectors << BDRV_SECTOR_BITS) - len) { 6264f736650SSam Li *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 6274f736650SSam Li return false; 6284f736650SSam Li } 6294f736650SSam Li 6304f736650SSam Li if (append) { 6314f736650SSam Li if (bs->bl.write_granularity) { 6324f736650SSam Li if ((offset % bs->bl.write_granularity) != 0) { 6334f736650SSam Li *status = VIRTIO_BLK_S_ZONE_UNALIGNED_WP; 6344f736650SSam Li return false; 6354f736650SSam Li } 6364f736650SSam Li } 6374f736650SSam Li 6384f736650SSam Li index = offset / bs->bl.zone_size; 6394f736650SSam Li if (BDRV_ZT_IS_CONV(bs->wps->wp[index])) { 6404f736650SSam Li *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 6414f736650SSam Li return false; 6424f736650SSam Li } 6434f736650SSam Li 6444f736650SSam Li if (len / 512 > bs->bl.max_append_sectors) { 6454f736650SSam Li if (bs->bl.max_append_sectors == 0) { 6464f736650SSam Li *status = VIRTIO_BLK_S_UNSUPP; 6474f736650SSam Li } else { 6484f736650SSam Li *status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 6494f736650SSam Li } 6504f736650SSam Li return false; 6514f736650SSam Li } 6524f736650SSam Li } 6534f736650SSam Li return true; 6544f736650SSam Li } 6554f736650SSam Li 6564f736650SSam Li static void virtio_blk_zone_report_complete(void *opaque, int ret) 6574f736650SSam Li { 6584f736650SSam Li ZoneCmdData *data = opaque; 6594f736650SSam Li VirtIOBlockReq *req = data->req; 6604f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); 6614f736650SSam Li struct iovec *in_iov = data->in_iov; 6624f736650SSam Li unsigned in_num = data->in_num; 6634f736650SSam Li int64_t zrp_size, n, j = 0; 6644f736650SSam Li int64_t nz = data->zone_report_data.nr_zones; 6654f736650SSam Li int8_t err_status = VIRTIO_BLK_S_OK; 666b3d9bb9aSStefan Hajnoczi struct virtio_blk_zone_report zrp_hdr = (struct virtio_blk_zone_report) { 667b3d9bb9aSStefan Hajnoczi .nr_zones = cpu_to_le64(nz), 668b3d9bb9aSStefan Hajnoczi }; 6694f736650SSam Li 6704e92acf7SSam Li trace_virtio_blk_zone_report_complete(vdev, req, nz, ret); 6714f736650SSam Li if (ret) { 6724f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 6734f736650SSam Li goto out; 6744f736650SSam Li } 6754f736650SSam Li 6764f736650SSam Li zrp_size = sizeof(struct virtio_blk_zone_report) 6774f736650SSam Li + sizeof(struct virtio_blk_zone_descriptor) * nz; 6784f736650SSam Li n = iov_from_buf(in_iov, in_num, 0, &zrp_hdr, sizeof(zrp_hdr)); 6794f736650SSam Li if (n != sizeof(zrp_hdr)) { 6804f736650SSam Li virtio_error(vdev, "Driver provided input buffer that is too small!"); 6814f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 6824f736650SSam Li goto out; 6834f736650SSam Li } 6844f736650SSam Li 6854f736650SSam Li for (size_t i = sizeof(zrp_hdr); i < zrp_size; 6864f736650SSam Li i += sizeof(struct virtio_blk_zone_descriptor), ++j) { 6874f736650SSam Li struct virtio_blk_zone_descriptor desc = 6884f736650SSam Li (struct virtio_blk_zone_descriptor) { 6894f736650SSam Li .z_start = cpu_to_le64(data->zone_report_data.zones[j].start 6904f736650SSam Li >> BDRV_SECTOR_BITS), 6914f736650SSam Li .z_cap = cpu_to_le64(data->zone_report_data.zones[j].cap 6924f736650SSam Li >> BDRV_SECTOR_BITS), 6934f736650SSam Li .z_wp = cpu_to_le64(data->zone_report_data.zones[j].wp 6944f736650SSam Li >> BDRV_SECTOR_BITS), 6954f736650SSam Li }; 6964f736650SSam Li 6974f736650SSam Li switch (data->zone_report_data.zones[j].type) { 6984f736650SSam Li case BLK_ZT_CONV: 6994f736650SSam Li desc.z_type = VIRTIO_BLK_ZT_CONV; 7004f736650SSam Li break; 7014f736650SSam Li case BLK_ZT_SWR: 7024f736650SSam Li desc.z_type = VIRTIO_BLK_ZT_SWR; 7034f736650SSam Li break; 7044f736650SSam Li case BLK_ZT_SWP: 7054f736650SSam Li desc.z_type = VIRTIO_BLK_ZT_SWP; 7064f736650SSam Li break; 7074f736650SSam Li default: 7084f736650SSam Li g_assert_not_reached(); 7094f736650SSam Li } 7104f736650SSam Li 7114f736650SSam Li switch (data->zone_report_data.zones[j].state) { 7124f736650SSam Li case BLK_ZS_RDONLY: 7134f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_RDONLY; 7144f736650SSam Li break; 7154f736650SSam Li case BLK_ZS_OFFLINE: 7164f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_OFFLINE; 7174f736650SSam Li break; 7184f736650SSam Li case BLK_ZS_EMPTY: 7194f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_EMPTY; 7204f736650SSam Li break; 7214f736650SSam Li case BLK_ZS_CLOSED: 7224f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_CLOSED; 7234f736650SSam Li break; 7244f736650SSam Li case BLK_ZS_FULL: 7254f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_FULL; 7264f736650SSam Li break; 7274f736650SSam Li case BLK_ZS_EOPEN: 7284f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_EOPEN; 7294f736650SSam Li break; 7304f736650SSam Li case BLK_ZS_IOPEN: 7314f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_IOPEN; 7324f736650SSam Li break; 7334f736650SSam Li case BLK_ZS_NOT_WP: 7344f736650SSam Li desc.z_state = VIRTIO_BLK_ZS_NOT_WP; 7354f736650SSam Li break; 7364f736650SSam Li default: 7374f736650SSam Li g_assert_not_reached(); 7384f736650SSam Li } 7394f736650SSam Li 7404f736650SSam Li /* TODO: it takes O(n^2) time complexity. Optimizations required. */ 7414f736650SSam Li n = iov_from_buf(in_iov, in_num, i, &desc, sizeof(desc)); 7424f736650SSam Li if (n != sizeof(desc)) { 7434f736650SSam Li virtio_error(vdev, "Driver provided input buffer " 7444f736650SSam Li "for descriptors that is too small!"); 7454f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 7464f736650SSam Li } 7474f736650SSam Li } 7484f736650SSam Li 7494f736650SSam Li out: 7504f736650SSam Li virtio_blk_req_complete(req, err_status); 7514f736650SSam Li virtio_blk_free_request(req); 7524f736650SSam Li g_free(data->zone_report_data.zones); 7534f736650SSam Li g_free(data); 7544f736650SSam Li } 7554f736650SSam Li 7564f736650SSam Li static void virtio_blk_handle_zone_report(VirtIOBlockReq *req, 7574f736650SSam Li struct iovec *in_iov, 7584f736650SSam Li unsigned in_num) 7594f736650SSam Li { 7604f736650SSam Li VirtIOBlock *s = req->dev; 7614f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s); 7624f736650SSam Li unsigned int nr_zones; 7634f736650SSam Li ZoneCmdData *data; 7644f736650SSam Li int64_t zone_size, offset; 7654f736650SSam Li uint8_t err_status; 7664f736650SSam Li 7674f736650SSam Li if (req->in_len < sizeof(struct virtio_blk_inhdr) + 7684f736650SSam Li sizeof(struct virtio_blk_zone_report) + 7694f736650SSam Li sizeof(struct virtio_blk_zone_descriptor)) { 7704f736650SSam Li virtio_error(vdev, "in buffer too small for zone report"); 7714f736650SSam Li return; 7724f736650SSam Li } 7734f736650SSam Li 7744f736650SSam Li /* start byte offset of the zone report */ 7754f736650SSam Li offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; 7764f736650SSam Li if (!check_zoned_request(s, offset, 0, false, &err_status)) { 7774f736650SSam Li goto out; 7784f736650SSam Li } 7794f736650SSam Li nr_zones = (req->in_len - sizeof(struct virtio_blk_inhdr) - 7804f736650SSam Li sizeof(struct virtio_blk_zone_report)) / 7814f736650SSam Li sizeof(struct virtio_blk_zone_descriptor); 7824e92acf7SSam Li trace_virtio_blk_handle_zone_report(vdev, req, 7834e92acf7SSam Li offset >> BDRV_SECTOR_BITS, nr_zones); 7844f736650SSam Li 7854f736650SSam Li zone_size = sizeof(BlockZoneDescriptor) * nr_zones; 7864f736650SSam Li data = g_malloc(sizeof(ZoneCmdData)); 7874f736650SSam Li data->req = req; 7884f736650SSam Li data->in_iov = in_iov; 7894f736650SSam Li data->in_num = in_num; 7904f736650SSam Li data->zone_report_data.nr_zones = nr_zones; 7914f736650SSam Li data->zone_report_data.zones = g_malloc(zone_size), 7924f736650SSam Li 7934f736650SSam Li blk_aio_zone_report(s->blk, offset, &data->zone_report_data.nr_zones, 7944f736650SSam Li data->zone_report_data.zones, 7954f736650SSam Li virtio_blk_zone_report_complete, data); 7964f736650SSam Li return; 7974f736650SSam Li out: 7984f736650SSam Li virtio_blk_req_complete(req, err_status); 7994f736650SSam Li virtio_blk_free_request(req); 8004f736650SSam Li } 8014f736650SSam Li 8024f736650SSam Li static void virtio_blk_zone_mgmt_complete(void *opaque, int ret) 8034f736650SSam Li { 8044f736650SSam Li VirtIOBlockReq *req = opaque; 8054f736650SSam Li VirtIOBlock *s = req->dev; 8064e92acf7SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s); 8074f736650SSam Li int8_t err_status = VIRTIO_BLK_S_OK; 8084e92acf7SSam Li trace_virtio_blk_zone_mgmt_complete(vdev, req,ret); 8094f736650SSam Li 8104f736650SSam Li if (ret) { 8114f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 8124f736650SSam Li } 8134f736650SSam Li 8144f736650SSam Li virtio_blk_req_complete(req, err_status); 8154f736650SSam Li virtio_blk_free_request(req); 8164f736650SSam Li } 8174f736650SSam Li 8184f736650SSam Li static int virtio_blk_handle_zone_mgmt(VirtIOBlockReq *req, BlockZoneOp op) 8194f736650SSam Li { 8204f736650SSam Li VirtIOBlock *s = req->dev; 8214f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s); 8224f736650SSam Li BlockDriverState *bs = blk_bs(s->blk); 8234f736650SSam Li int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; 8244f736650SSam Li uint64_t len; 8254f736650SSam Li uint64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; 8264f736650SSam Li uint8_t err_status = VIRTIO_BLK_S_OK; 8274f736650SSam Li 8284f736650SSam Li uint32_t type = virtio_ldl_p(vdev, &req->out.type); 8294f736650SSam Li if (type == VIRTIO_BLK_T_ZONE_RESET_ALL) { 8304f736650SSam Li /* Entire drive capacity */ 8314f736650SSam Li offset = 0; 8324f736650SSam Li len = capacity; 8334e92acf7SSam Li trace_virtio_blk_handle_zone_reset_all(vdev, req, 0, 8344e92acf7SSam Li bs->total_sectors); 8354f736650SSam Li } else { 8364f736650SSam Li if (bs->bl.zone_size > capacity - offset) { 8374f736650SSam Li /* The zoned device allows the last smaller zone. */ 8384f736650SSam Li len = capacity - bs->bl.zone_size * (bs->bl.nr_zones - 1); 8394f736650SSam Li } else { 8404f736650SSam Li len = bs->bl.zone_size; 8414f736650SSam Li } 8424e92acf7SSam Li trace_virtio_blk_handle_zone_mgmt(vdev, req, op, 8434e92acf7SSam Li offset >> BDRV_SECTOR_BITS, 8444e92acf7SSam Li len >> BDRV_SECTOR_BITS); 8454f736650SSam Li } 8464f736650SSam Li 8474f736650SSam Li if (!check_zoned_request(s, offset, len, false, &err_status)) { 8484f736650SSam Li goto out; 8494f736650SSam Li } 8504f736650SSam Li 8514f736650SSam Li blk_aio_zone_mgmt(s->blk, op, offset, len, 8524f736650SSam Li virtio_blk_zone_mgmt_complete, req); 8534f736650SSam Li 8544f736650SSam Li return 0; 8554f736650SSam Li out: 8564f736650SSam Li virtio_blk_req_complete(req, err_status); 8574f736650SSam Li virtio_blk_free_request(req); 8584f736650SSam Li return err_status; 8594f736650SSam Li } 8604f736650SSam Li 8614f736650SSam Li static void virtio_blk_zone_append_complete(void *opaque, int ret) 8624f736650SSam Li { 8634f736650SSam Li ZoneCmdData *data = opaque; 8644f736650SSam Li VirtIOBlockReq *req = data->req; 8654f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(req->dev); 8664f736650SSam Li int64_t append_sector, n; 8674f736650SSam Li uint8_t err_status = VIRTIO_BLK_S_OK; 8684f736650SSam Li 8694f736650SSam Li if (ret) { 8704f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 8714f736650SSam Li goto out; 8724f736650SSam Li } 8734f736650SSam Li 8744f736650SSam Li virtio_stq_p(vdev, &append_sector, 8754f736650SSam Li data->zone_append_data.offset >> BDRV_SECTOR_BITS); 8764f736650SSam Li n = iov_from_buf(data->in_iov, data->in_num, 0, &append_sector, 8774f736650SSam Li sizeof(append_sector)); 8784f736650SSam Li if (n != sizeof(append_sector)) { 8794f736650SSam Li virtio_error(vdev, "Driver provided input buffer less than size of " 8804f736650SSam Li "append_sector"); 8814f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD; 8824f736650SSam Li goto out; 8834f736650SSam Li } 8844e92acf7SSam Li trace_virtio_blk_zone_append_complete(vdev, req, append_sector, ret); 8854f736650SSam Li 8864f736650SSam Li out: 8874f736650SSam Li virtio_blk_req_complete(req, err_status); 8884f736650SSam Li virtio_blk_free_request(req); 8894f736650SSam Li g_free(data); 8904f736650SSam Li } 8914f736650SSam Li 8924f736650SSam Li static int virtio_blk_handle_zone_append(VirtIOBlockReq *req, 8934f736650SSam Li struct iovec *out_iov, 8944f736650SSam Li struct iovec *in_iov, 8954f736650SSam Li uint64_t out_num, 8964f736650SSam Li unsigned in_num) { 8974f736650SSam Li VirtIOBlock *s = req->dev; 8984f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s); 8994f736650SSam Li uint8_t err_status = VIRTIO_BLK_S_OK; 9004f736650SSam Li 9014f736650SSam Li int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS; 9024f736650SSam Li int64_t len = iov_size(out_iov, out_num); 903b3d9bb9aSStefan Hajnoczi ZoneCmdData *data; 9044f736650SSam Li 9054e92acf7SSam Li trace_virtio_blk_handle_zone_append(vdev, req, offset >> BDRV_SECTOR_BITS); 9064f736650SSam Li if (!check_zoned_request(s, offset, len, true, &err_status)) { 9074f736650SSam Li goto out; 9084f736650SSam Li } 9094f736650SSam Li 910b3d9bb9aSStefan Hajnoczi data = g_malloc(sizeof(ZoneCmdData)); 9114f736650SSam Li data->req = req; 9124f736650SSam Li data->in_iov = in_iov; 9134f736650SSam Li data->in_num = in_num; 9144f736650SSam Li data->zone_append_data.offset = offset; 9154f736650SSam Li qemu_iovec_init_external(&req->qiov, out_iov, out_num); 91652eb76f4SSam Li 91752eb76f4SSam Li block_acct_start(blk_get_stats(s->blk), &req->acct, len, 91852eb76f4SSam Li BLOCK_ACCT_ZONE_APPEND); 91952eb76f4SSam Li 9204f736650SSam Li blk_aio_zone_append(s->blk, &data->zone_append_data.offset, &req->qiov, 0, 9214f736650SSam Li virtio_blk_zone_append_complete, data); 9224f736650SSam Li return 0; 9234f736650SSam Li 9244f736650SSam Li out: 9254f736650SSam Li virtio_blk_req_complete(req, err_status); 9264f736650SSam Li virtio_blk_free_request(req); 9274f736650SSam Li return err_status; 9284f736650SSam Li } 9294f736650SSam Li 93020ea686aSGreg Kurz static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) 9316e790746SPaolo Bonzini { 9326e790746SPaolo Bonzini uint32_t type; 933f897bf75SStefan Hajnoczi struct iovec *in_iov = req->elem.in_sg; 9345636da76SDongli Zhang struct iovec *out_iov = req->elem.out_sg; 935f897bf75SStefan Hajnoczi unsigned in_num = req->elem.in_num; 936f897bf75SStefan Hajnoczi unsigned out_num = req->elem.out_num; 93720ea686aSGreg Kurz VirtIOBlock *s = req->dev; 93820ea686aSGreg Kurz VirtIODevice *vdev = VIRTIO_DEVICE(s); 9396e790746SPaolo Bonzini 940f897bf75SStefan Hajnoczi if (req->elem.out_num < 1 || req->elem.in_num < 1) { 94120ea686aSGreg Kurz virtio_error(vdev, "virtio-blk missing headers"); 94220ea686aSGreg Kurz return -1; 9436e790746SPaolo Bonzini } 9446e790746SPaolo Bonzini 9455636da76SDongli Zhang if (unlikely(iov_to_buf(out_iov, out_num, 0, &req->out, 946827805a2SFam Zheng sizeof(req->out)) != sizeof(req->out))) { 94720ea686aSGreg Kurz virtio_error(vdev, "virtio-blk request outhdr too short"); 94820ea686aSGreg Kurz return -1; 949827805a2SFam Zheng } 950ee17e848SFam Zheng 9517bd04a04SStefan Hajnoczi iov_discard_front_undoable(&out_iov, &out_num, sizeof(req->out), 9527bd04a04SStefan Hajnoczi &req->outhdr_undo); 953ee17e848SFam Zheng 95412048545SGonglei if (in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) { 95520ea686aSGreg Kurz virtio_error(vdev, "virtio-blk request inhdr too short"); 9567bd04a04SStefan Hajnoczi iov_discard_undo(&req->outhdr_undo); 95720ea686aSGreg Kurz return -1; 958ee17e848SFam Zheng } 959ee17e848SFam Zheng 9602a6cdd6dSPaolo Bonzini /* We always touch the last byte, so just see how big in_iov is. */ 9612a6cdd6dSPaolo Bonzini req->in_len = iov_size(in_iov, in_num); 962ee17e848SFam Zheng req->in = (void *)in_iov[in_num - 1].iov_base 963ee17e848SFam Zheng + in_iov[in_num - 1].iov_len 964ee17e848SFam Zheng - sizeof(struct virtio_blk_inhdr); 9657bd04a04SStefan Hajnoczi iov_discard_back_undoable(in_iov, &in_num, sizeof(struct virtio_blk_inhdr), 9667bd04a04SStefan Hajnoczi &req->inhdr_undo); 9676e790746SPaolo Bonzini 9689a6719d5SStefano Garzarella type = virtio_ldl_p(vdev, &req->out.type); 9696e790746SPaolo Bonzini 97095f7142aSPeter Lieven /* VIRTIO_BLK_T_OUT defines the command direction. VIRTIO_BLK_T_BARRIER 971631b22eaSStefan Weil * is an optional flag. Although a guest should not send this flag if 97295f7142aSPeter Lieven * not negotiated we ignored it in the past. So keep ignoring it. */ 97395f7142aSPeter Lieven switch (type & ~(VIRTIO_BLK_T_OUT | VIRTIO_BLK_T_BARRIER)) { 97495f7142aSPeter Lieven case VIRTIO_BLK_T_IN: 97595f7142aSPeter Lieven { 97695f7142aSPeter Lieven bool is_write = type & VIRTIO_BLK_T_OUT; 9779a6719d5SStefano Garzarella req->sector_num = virtio_ldq_p(vdev, &req->out.sector); 97895f7142aSPeter Lieven 97995f7142aSPeter Lieven if (is_write) { 9805636da76SDongli Zhang qemu_iovec_init_external(&req->qiov, out_iov, out_num); 981a576ceacSStefan Hajnoczi trace_virtio_blk_handle_write(vdev, req, req->sector_num, 98295f7142aSPeter Lieven req->qiov.size / BDRV_SECTOR_SIZE); 98395f7142aSPeter Lieven } else { 98495f7142aSPeter Lieven qemu_iovec_init_external(&req->qiov, in_iov, in_num); 985a576ceacSStefan Hajnoczi trace_virtio_blk_handle_read(vdev, req, req->sector_num, 98695f7142aSPeter Lieven req->qiov.size / BDRV_SECTOR_SIZE); 98795f7142aSPeter Lieven } 98895f7142aSPeter Lieven 9899a6719d5SStefano Garzarella if (!virtio_blk_sect_range_ok(s, req->sector_num, req->qiov.size)) { 99095f7142aSPeter Lieven virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); 9919a6719d5SStefano Garzarella block_acct_invalid(blk_get_stats(s->blk), 99201762e03SAlberto Garcia is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); 99395f7142aSPeter Lieven virtio_blk_free_request(req); 99420ea686aSGreg Kurz return 0; 99595f7142aSPeter Lieven } 99695f7142aSPeter Lieven 9979a6719d5SStefano Garzarella block_acct_start(blk_get_stats(s->blk), &req->acct, req->qiov.size, 99895f7142aSPeter Lieven is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ); 99995f7142aSPeter Lieven 100095f7142aSPeter Lieven /* merge would exceed maximum number of requests or IO direction 100195f7142aSPeter Lieven * changes */ 100295f7142aSPeter Lieven if (mrb->num_reqs > 0 && (mrb->num_reqs == VIRTIO_BLK_MAX_MERGE_REQS || 1003c99495acSPeter Lieven is_write != mrb->is_write || 10049a6719d5SStefano Garzarella !s->conf.request_merging)) { 1005baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, mrb); 100695f7142aSPeter Lieven } 100795f7142aSPeter Lieven 100895f7142aSPeter Lieven assert(mrb->num_reqs < VIRTIO_BLK_MAX_MERGE_REQS); 100995f7142aSPeter Lieven mrb->reqs[mrb->num_reqs++] = req; 101095f7142aSPeter Lieven mrb->is_write = is_write; 101195f7142aSPeter Lieven break; 101295f7142aSPeter Lieven } 101395f7142aSPeter Lieven case VIRTIO_BLK_T_FLUSH: 10146e790746SPaolo Bonzini virtio_blk_handle_flush(req, mrb); 101595f7142aSPeter Lieven break; 10164f736650SSam Li case VIRTIO_BLK_T_ZONE_REPORT: 10174f736650SSam Li virtio_blk_handle_zone_report(req, in_iov, in_num); 10184f736650SSam Li break; 10194f736650SSam Li case VIRTIO_BLK_T_ZONE_OPEN: 10204f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_OPEN); 10214f736650SSam Li break; 10224f736650SSam Li case VIRTIO_BLK_T_ZONE_CLOSE: 10234f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_CLOSE); 10244f736650SSam Li break; 10254f736650SSam Li case VIRTIO_BLK_T_ZONE_FINISH: 10264f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_FINISH); 10274f736650SSam Li break; 10284f736650SSam Li case VIRTIO_BLK_T_ZONE_RESET: 10294f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET); 10304f736650SSam Li break; 10314f736650SSam Li case VIRTIO_BLK_T_ZONE_RESET_ALL: 10324f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET); 10334f736650SSam Li break; 103495f7142aSPeter Lieven case VIRTIO_BLK_T_SCSI_CMD: 10356e790746SPaolo Bonzini virtio_blk_handle_scsi(req); 103695f7142aSPeter Lieven break; 103795f7142aSPeter Lieven case VIRTIO_BLK_T_GET_ID: 103895f7142aSPeter Lieven { 10396e790746SPaolo Bonzini /* 10406e790746SPaolo Bonzini * NB: per existing s/n string convention the string is 10416e790746SPaolo Bonzini * terminated by '\0' only when shorter than buffer. 10426e790746SPaolo Bonzini */ 10432a30307fSMarkus Armbruster const char *serial = s->conf.serial ? s->conf.serial : ""; 1044a83ceea8SMarc Marí size_t size = MIN(strlen(serial) + 1, 1045a83ceea8SMarc Marí MIN(iov_size(in_iov, in_num), 1046a83ceea8SMarc Marí VIRTIO_BLK_ID_BYTES)); 1047a83ceea8SMarc Marí iov_from_buf(in_iov, in_num, 0, serial, size); 10486e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); 1049671ec3f0SFam Zheng virtio_blk_free_request(req); 105095f7142aSPeter Lieven break; 105195f7142aSPeter Lieven } 10524f736650SSam Li case VIRTIO_BLK_T_ZONE_APPEND & ~VIRTIO_BLK_T_OUT: 10534f736650SSam Li /* 10544f736650SSam Li * Passing out_iov/out_num and in_iov/in_num is not safe 10554f736650SSam Li * to access req->elem.out_sg directly because it may be 10564f736650SSam Li * modified by virtio_blk_handle_request(). 10574f736650SSam Li */ 10584f736650SSam Li virtio_blk_handle_zone_append(req, out_iov, in_iov, out_num, in_num); 10594f736650SSam Li break; 106037b06f8dSStefano Garzarella /* 106137b06f8dSStefano Garzarella * VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES are defined with 106237b06f8dSStefano Garzarella * VIRTIO_BLK_T_OUT flag set. We masked this flag in the switch statement, 106337b06f8dSStefano Garzarella * so we must mask it for these requests, then we will check if it is set. 106437b06f8dSStefano Garzarella */ 106537b06f8dSStefano Garzarella case VIRTIO_BLK_T_DISCARD & ~VIRTIO_BLK_T_OUT: 106637b06f8dSStefano Garzarella case VIRTIO_BLK_T_WRITE_ZEROES & ~VIRTIO_BLK_T_OUT: 106737b06f8dSStefano Garzarella { 106837b06f8dSStefano Garzarella struct virtio_blk_discard_write_zeroes dwz_hdr; 106937b06f8dSStefano Garzarella size_t out_len = iov_size(out_iov, out_num); 107037b06f8dSStefano Garzarella bool is_write_zeroes = (type & ~VIRTIO_BLK_T_BARRIER) == 107137b06f8dSStefano Garzarella VIRTIO_BLK_T_WRITE_ZEROES; 107237b06f8dSStefano Garzarella uint8_t err_status; 107337b06f8dSStefano Garzarella 107437b06f8dSStefano Garzarella /* 107537b06f8dSStefano Garzarella * Unsupported if VIRTIO_BLK_T_OUT is not set or the request contains 107637b06f8dSStefano Garzarella * more than one segment. 107737b06f8dSStefano Garzarella */ 107837b06f8dSStefano Garzarella if (unlikely(!(type & VIRTIO_BLK_T_OUT) || 107937b06f8dSStefano Garzarella out_len > sizeof(dwz_hdr))) { 108037b06f8dSStefano Garzarella virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); 108137b06f8dSStefano Garzarella virtio_blk_free_request(req); 108237b06f8dSStefano Garzarella return 0; 108337b06f8dSStefano Garzarella } 108437b06f8dSStefano Garzarella 108537b06f8dSStefano Garzarella if (unlikely(iov_to_buf(out_iov, out_num, 0, &dwz_hdr, 108637b06f8dSStefano Garzarella sizeof(dwz_hdr)) != sizeof(dwz_hdr))) { 10877bd04a04SStefan Hajnoczi iov_discard_undo(&req->inhdr_undo); 10887bd04a04SStefan Hajnoczi iov_discard_undo(&req->outhdr_undo); 108937b06f8dSStefano Garzarella virtio_error(vdev, "virtio-blk discard/write_zeroes header" 109037b06f8dSStefano Garzarella " too short"); 109137b06f8dSStefano Garzarella return -1; 109237b06f8dSStefano Garzarella } 109337b06f8dSStefano Garzarella 109437b06f8dSStefano Garzarella err_status = virtio_blk_handle_discard_write_zeroes(req, &dwz_hdr, 109537b06f8dSStefano Garzarella is_write_zeroes); 109637b06f8dSStefano Garzarella if (err_status != VIRTIO_BLK_S_OK) { 109737b06f8dSStefano Garzarella virtio_blk_req_complete(req, err_status); 109837b06f8dSStefano Garzarella virtio_blk_free_request(req); 109937b06f8dSStefano Garzarella } 110037b06f8dSStefano Garzarella 110137b06f8dSStefano Garzarella break; 110237b06f8dSStefano Garzarella } 110395f7142aSPeter Lieven default: 11046e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); 1105671ec3f0SFam Zheng virtio_blk_free_request(req); 11066e790746SPaolo Bonzini } 110720ea686aSGreg Kurz return 0; 11086e790746SPaolo Bonzini } 11096e790746SPaolo Bonzini 1110186b9691SStefan Hajnoczi void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq) 11116e790746SPaolo Bonzini { 11126e790746SPaolo Bonzini VirtIOBlockReq *req; 111395f7142aSPeter Lieven MultiReqBuffer mrb = {}; 1114d0435bc5SStefan Hajnoczi bool suppress_notifications = virtio_queue_get_notification(vq); 11156e790746SPaolo Bonzini 1116ccee48aaSStefan Hajnoczi defer_call_begin(); 1117fc73548eSStefan Hajnoczi 11189ef9d402SStefan Hajnoczi do { 1119d0435bc5SStefan Hajnoczi if (suppress_notifications) { 11209ef9d402SStefan Hajnoczi virtio_queue_set_notification(vq, 0); 1121d0435bc5SStefan Hajnoczi } 11229ef9d402SStefan Hajnoczi 1123edaffd9fSStefan Hajnoczi while ((req = virtio_blk_get_request(s, vq))) { 112420ea686aSGreg Kurz if (virtio_blk_handle_request(req, &mrb)) { 112520ea686aSGreg Kurz virtqueue_detach_element(req->vq, &req->elem, 0); 112620ea686aSGreg Kurz virtio_blk_free_request(req); 112720ea686aSGreg Kurz break; 112820ea686aSGreg Kurz } 11296e790746SPaolo Bonzini } 11306e790746SPaolo Bonzini 1131d0435bc5SStefan Hajnoczi if (suppress_notifications) { 11329ef9d402SStefan Hajnoczi virtio_queue_set_notification(vq, 1); 1133d0435bc5SStefan Hajnoczi } 11349ef9d402SStefan Hajnoczi } while (!virtio_queue_empty(vq)); 11359ef9d402SStefan Hajnoczi 113695f7142aSPeter Lieven if (mrb.num_reqs) { 1137baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, &mrb); 113895f7142aSPeter Lieven } 1139fc73548eSStefan Hajnoczi 1140ccee48aaSStefan Hajnoczi defer_call_end(); 11416e790746SPaolo Bonzini } 11426e790746SPaolo Bonzini 11438a2fad57SMichael S. Tsirkin static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) 11448a2fad57SMichael S. Tsirkin { 11458a2fad57SMichael S. Tsirkin VirtIOBlock *s = (VirtIOBlock *)vdev; 11468a2fad57SMichael S. Tsirkin 11473cdaf3ddSStefan Hajnoczi if (!s->ioeventfd_disabled && !s->ioeventfd_started) { 11488a2fad57SMichael S. Tsirkin /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start 11493cdaf3ddSStefan Hajnoczi * ioeventfd here instead of waiting for .set_status(). 11508a2fad57SMichael S. Tsirkin */ 11519ffe337cSPaolo Bonzini virtio_device_start_ioeventfd(vdev); 11523cdaf3ddSStefan Hajnoczi if (!s->ioeventfd_disabled) { 11538a2fad57SMichael S. Tsirkin return; 11548a2fad57SMichael S. Tsirkin } 11558a2fad57SMichael S. Tsirkin } 1156b6948ab0SStefan Hajnoczi 1157186b9691SStefan Hajnoczi virtio_blk_handle_vq(s, vq); 11588a2fad57SMichael S. Tsirkin } 11598a2fad57SMichael S. Tsirkin 1160a937f8e8SStefan Hajnoczi static void virtio_blk_dma_restart_bh(void *opaque) 11616e790746SPaolo Bonzini { 116271ee0cddSStefan Hajnoczi VirtIOBlockReq *req = opaque; 116371ee0cddSStefan Hajnoczi VirtIOBlock *s = req->dev; /* we're called with at least one request */ 1164a937f8e8SStefan Hajnoczi 116595f7142aSPeter Lieven MultiReqBuffer mrb = {}; 11666e790746SPaolo Bonzini 11676e790746SPaolo Bonzini while (req) { 11681bdb176aSzhanghailiang VirtIOBlockReq *next = req->next; 116920ea686aSGreg Kurz if (virtio_blk_handle_request(req, &mrb)) { 117020ea686aSGreg Kurz /* Device is now broken and won't do any processing until it gets 117120ea686aSGreg Kurz * reset. Already queued requests will be lost: let's purge them. 117220ea686aSGreg Kurz */ 117320ea686aSGreg Kurz while (req) { 117420ea686aSGreg Kurz next = req->next; 117520ea686aSGreg Kurz virtqueue_detach_element(req->vq, &req->elem, 0); 117620ea686aSGreg Kurz virtio_blk_free_request(req); 117720ea686aSGreg Kurz req = next; 117820ea686aSGreg Kurz } 117920ea686aSGreg Kurz break; 118020ea686aSGreg Kurz } 11811bdb176aSzhanghailiang req = next; 11826e790746SPaolo Bonzini } 11836e790746SPaolo Bonzini 118495f7142aSPeter Lieven if (mrb.num_reqs) { 1185baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, &mrb); 118695f7142aSPeter Lieven } 1187a937f8e8SStefan Hajnoczi 1188a937f8e8SStefan Hajnoczi /* Paired with inc in virtio_blk_dma_restart_cb() */ 1189680f2002SKevin Wolf blk_dec_in_flight(s->conf.conf.blk); 11906e790746SPaolo Bonzini } 11916e790746SPaolo Bonzini 1192538f0497SPhilippe Mathieu-Daudé static void virtio_blk_dma_restart_cb(void *opaque, bool running, 11936e790746SPaolo Bonzini RunState state) 11946e790746SPaolo Bonzini { 11956e790746SPaolo Bonzini VirtIOBlock *s = opaque; 119671ee0cddSStefan Hajnoczi uint16_t num_queues = s->conf.num_queues; 1197b3d9bb9aSStefan Hajnoczi g_autofree VirtIOBlockReq **vq_rq = NULL; 1198b3d9bb9aSStefan Hajnoczi VirtIOBlockReq *rq; 11996e790746SPaolo Bonzini 12006e790746SPaolo Bonzini if (!running) { 12016e790746SPaolo Bonzini return; 12026e790746SPaolo Bonzini } 12036e790746SPaolo Bonzini 120471ee0cddSStefan Hajnoczi /* Split the device-wide s->rq request list into per-vq request lists */ 1205b3d9bb9aSStefan Hajnoczi vq_rq = g_new0(VirtIOBlockReq *, num_queues); 120671ee0cddSStefan Hajnoczi 120771ee0cddSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) { 120871ee0cddSStefan Hajnoczi rq = s->rq; 120971ee0cddSStefan Hajnoczi s->rq = NULL; 121071ee0cddSStefan Hajnoczi } 121171ee0cddSStefan Hajnoczi 121271ee0cddSStefan Hajnoczi while (rq) { 121371ee0cddSStefan Hajnoczi VirtIOBlockReq *next = rq->next; 121471ee0cddSStefan Hajnoczi uint16_t idx = virtio_get_queue_index(rq->vq); 121571ee0cddSStefan Hajnoczi 1216f2eea93cSStefan Hajnoczi /* Only num_queues vqs were created so vq_rq[idx] is within bounds */ 1217f2eea93cSStefan Hajnoczi assert(idx < num_queues); 121871ee0cddSStefan Hajnoczi rq->next = vq_rq[idx]; 121971ee0cddSStefan Hajnoczi vq_rq[idx] = rq; 122071ee0cddSStefan Hajnoczi rq = next; 122171ee0cddSStefan Hajnoczi } 122271ee0cddSStefan Hajnoczi 122371ee0cddSStefan Hajnoczi /* Schedule a BH to submit the requests in each vq's AioContext */ 122471ee0cddSStefan Hajnoczi for (uint16_t i = 0; i < num_queues; i++) { 122571ee0cddSStefan Hajnoczi if (!vq_rq[i]) { 122671ee0cddSStefan Hajnoczi continue; 122771ee0cddSStefan Hajnoczi } 122871ee0cddSStefan Hajnoczi 1229a937f8e8SStefan Hajnoczi /* Paired with dec in virtio_blk_dma_restart_bh() */ 1230680f2002SKevin Wolf blk_inc_in_flight(s->conf.conf.blk); 1231a937f8e8SStefan Hajnoczi 123271ee0cddSStefan Hajnoczi aio_bh_schedule_oneshot(s->vq_aio_context[i], 123371ee0cddSStefan Hajnoczi virtio_blk_dma_restart_bh, 123471ee0cddSStefan Hajnoczi vq_rq[i]); 123571ee0cddSStefan Hajnoczi } 12366e790746SPaolo Bonzini } 12376e790746SPaolo Bonzini 12386e790746SPaolo Bonzini static void virtio_blk_reset(VirtIODevice *vdev) 12396e790746SPaolo Bonzini { 12406e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 124126307f6aSFam Zheng VirtIOBlockReq *req; 12426e790746SPaolo Bonzini 12439c67f33fSStefan Hajnoczi /* Dataplane has stopped... */ 12443cdaf3ddSStefan Hajnoczi assert(!s->ioeventfd_started); 12459c67f33fSStefan Hajnoczi 12469c67f33fSStefan Hajnoczi /* ...but requests may still be in flight. */ 12476e40b3bfSAlexander Yarygin blk_drain(s->blk); 12486e40b3bfSAlexander Yarygin 124926307f6aSFam Zheng /* We drop queued requests after blk_drain() because blk_drain() itself can 125026307f6aSFam Zheng * produce them. */ 12519c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) { 125226307f6aSFam Zheng while (s->rq) { 125326307f6aSFam Zheng req = s->rq; 125426307f6aSFam Zheng s->rq = req->next; 12559c67f33fSStefan Hajnoczi 12569c67f33fSStefan Hajnoczi /* No other threads can access req->vq here */ 125797b93c8aSStefan Hajnoczi virtqueue_detach_element(req->vq, &req->elem, 0); 12589c67f33fSStefan Hajnoczi 125926307f6aSFam Zheng virtio_blk_free_request(req); 126026307f6aSFam Zheng } 12619c67f33fSStefan Hajnoczi } 126226307f6aSFam Zheng 12634be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, s->original_wce); 12646e790746SPaolo Bonzini } 12656e790746SPaolo Bonzini 12666e790746SPaolo Bonzini /* coalesce internal state, copy to pci i/o region 0 12676e790746SPaolo Bonzini */ 12686e790746SPaolo Bonzini static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) 12696e790746SPaolo Bonzini { 12706e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 12712a30307fSMarkus Armbruster BlockConf *conf = &s->conf.conf; 12724f736650SSam Li BlockDriverState *bs = blk_bs(s->blk); 12736e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 12746e790746SPaolo Bonzini uint64_t capacity; 127517d0bc01SStefan Hajnoczi int64_t length; 1276f7516731SMarkus Armbruster int blk_size = conf->logical_block_size; 12776e790746SPaolo Bonzini 12784be74634SMarkus Armbruster blk_get_geometry(s->blk, &capacity); 12796e790746SPaolo Bonzini memset(&blkcfg, 0, sizeof(blkcfg)); 1280783d1897SRusty Russell virtio_stq_p(vdev, &blkcfg.capacity, capacity); 12811bf8a989SDenis Plotnikov virtio_stl_p(vdev, &blkcfg.seg_max, 12821bf8a989SDenis Plotnikov s->conf.seg_max_adjust ? s->conf.queue_size - 2 : 128 - 2); 1283907eb3e5SMichael S. Tsirkin virtio_stw_p(vdev, &blkcfg.geometry.cylinders, conf->cyls); 1284783d1897SRusty Russell virtio_stl_p(vdev, &blkcfg.blk_size, blk_size); 1285f7516731SMarkus Armbruster virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size); 12866abee260SRoman Kagan virtio_stl_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size); 1287907eb3e5SMichael S. Tsirkin blkcfg.geometry.heads = conf->heads; 12886e790746SPaolo Bonzini /* 12896e790746SPaolo Bonzini * We must ensure that the block device capacity is a multiple of 1290e03ba136SPeter Maydell * the logical block size. If that is not the case, let's use 12916e790746SPaolo Bonzini * sector_mask to adopt the geometry to have a correct picture. 12926e790746SPaolo Bonzini * For those devices where the capacity is ok for the given geometry 1293e03ba136SPeter Maydell * we don't touch the sector value of the geometry, since some devices 12946e790746SPaolo Bonzini * (like s390 dasd) need a specific value. Here the capacity is already 12956e790746SPaolo Bonzini * cyls*heads*secs*blk_size and the sector value is not block size 12966e790746SPaolo Bonzini * divided by 512 - instead it is the amount of blk_size blocks 12976e790746SPaolo Bonzini * per track (cylinder). 12986e790746SPaolo Bonzini */ 129917d0bc01SStefan Hajnoczi length = blk_getlength(s->blk); 130017d0bc01SStefan Hajnoczi if (length > 0 && length / conf->heads / conf->secs % blk_size) { 1301907eb3e5SMichael S. Tsirkin blkcfg.geometry.sectors = conf->secs & ~s->sector_mask; 13026e790746SPaolo Bonzini } else { 1303907eb3e5SMichael S. Tsirkin blkcfg.geometry.sectors = conf->secs; 13046e790746SPaolo Bonzini } 13056e790746SPaolo Bonzini blkcfg.size_max = 0; 1306f7516731SMarkus Armbruster blkcfg.physical_block_exp = get_physical_block_exp(conf); 13076e790746SPaolo Bonzini blkcfg.alignment_offset = 0; 13084be74634SMarkus Armbruster blkcfg.wce = blk_enable_write_cache(s->blk); 13092f270590SStefan Hajnoczi virtio_stw_p(vdev, &blkcfg.num_queues, s->conf.num_queues); 131037b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD)) { 1311fb0b154cSAkihiko Odaki uint32_t discard_granularity = conf->discard_granularity; 1312fb0b154cSAkihiko Odaki if (discard_granularity == -1 || !s->conf.report_discard_granularity) { 1313fb0b154cSAkihiko Odaki discard_granularity = blk_size; 1314fb0b154cSAkihiko Odaki } 131537b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_discard_sectors, 131637b06f8dSStefano Garzarella s->conf.max_discard_sectors); 131737b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.discard_sector_alignment, 1318fb0b154cSAkihiko Odaki discard_granularity >> BDRV_SECTOR_BITS); 131937b06f8dSStefano Garzarella /* 132037b06f8dSStefano Garzarella * We support only one segment per request since multiple segments 132137b06f8dSStefano Garzarella * are not widely used and there are no userspace APIs that allow 132237b06f8dSStefano Garzarella * applications to submit multiple segments in a single call. 132337b06f8dSStefano Garzarella */ 132437b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_discard_seg, 1); 132537b06f8dSStefano Garzarella } 132637b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES)) { 132737b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_write_zeroes_sectors, 132837b06f8dSStefano Garzarella s->conf.max_write_zeroes_sectors); 132937b06f8dSStefano Garzarella blkcfg.write_zeroes_may_unmap = 1; 133037b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_write_zeroes_seg, 1); 133137b06f8dSStefano Garzarella } 13324f736650SSam Li if (bs->bl.zoned != BLK_Z_NONE) { 13334f736650SSam Li switch (bs->bl.zoned) { 13344f736650SSam Li case BLK_Z_HM: 13354f736650SSam Li blkcfg.zoned.model = VIRTIO_BLK_Z_HM; 13364f736650SSam Li break; 13374f736650SSam Li case BLK_Z_HA: 13384f736650SSam Li blkcfg.zoned.model = VIRTIO_BLK_Z_HA; 13394f736650SSam Li break; 13404f736650SSam Li default: 13414f736650SSam Li g_assert_not_reached(); 13424f736650SSam Li } 13434f736650SSam Li 13444f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.zone_sectors, 13454f736650SSam Li bs->bl.zone_size / 512); 13464f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.max_active_zones, 13474f736650SSam Li bs->bl.max_active_zones); 13484f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.max_open_zones, 13494f736650SSam Li bs->bl.max_open_zones); 13504f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.write_granularity, blk_size); 13514f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.max_append_sectors, 13524f736650SSam Li bs->bl.max_append_sectors); 13534f736650SSam Li } else { 13544f736650SSam Li blkcfg.zoned.model = VIRTIO_BLK_Z_NONE; 13554f736650SSam Li } 135620764be0SStefano Garzarella memcpy(config, &blkcfg, s->config_size); 13576e790746SPaolo Bonzini } 13586e790746SPaolo Bonzini 13596e790746SPaolo Bonzini static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config) 13606e790746SPaolo Bonzini { 13616e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 13626e790746SPaolo Bonzini struct virtio_blk_config blkcfg; 13636e790746SPaolo Bonzini 136420764be0SStefano Garzarella memcpy(&blkcfg, config, s->config_size); 13656d7e73d6SFam Zheng 13664be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, blkcfg.wce != 0); 13676e790746SPaolo Bonzini } 13686e790746SPaolo Bonzini 13699d5b731dSJason Wang static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features, 13709d5b731dSJason Wang Error **errp) 13716e790746SPaolo Bonzini { 13726e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 13736e790746SPaolo Bonzini 1374bbe8bd4dSStefano Garzarella /* Firstly sync all virtio-blk possible supported features */ 1375bbe8bd4dSStefano Garzarella features |= s->host_features; 1376bbe8bd4dSStefano Garzarella 13770cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX); 13780cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY); 13790cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); 13800cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); 138195129d6fSCornelia Huck if (virtio_has_feature(features, VIRTIO_F_VERSION_1)) { 1382bbe8bd4dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_SCSI)) { 1383efb8206cSJason Wang error_setg(errp, "Please set scsi=off for virtio-blk devices in order to use virtio 1.0"); 1384efb8206cSJason Wang return 0; 1385efb8206cSJason Wang } 1386efb8206cSJason Wang } else { 1387c9b11f97SJason Wang virtio_clear_feature(&features, VIRTIO_F_ANY_LAYOUT); 1388efb8206cSJason Wang virtio_add_feature(&features, VIRTIO_BLK_F_SCSI); 1389efb8206cSJason Wang } 13906e790746SPaolo Bonzini 13915f258577SEvgeny Yakovlev if (blk_enable_write_cache(s->blk) || 13925f258577SEvgeny Yakovlev (s->conf.x_enable_wce_if_config_wce && 13935f258577SEvgeny Yakovlev virtio_has_feature(features, VIRTIO_BLK_F_CONFIG_WCE))) { 13940cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_WCE); 13954be74634SMarkus Armbruster } 139686b1cf32SKevin Wolf if (!blk_is_writable(s->blk)) { 13970cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_RO); 13984be74634SMarkus Armbruster } 13992f270590SStefan Hajnoczi if (s->conf.num_queues > 1) { 14002f270590SStefan Hajnoczi virtio_add_feature(&features, VIRTIO_BLK_F_MQ); 14012f270590SStefan Hajnoczi } 14026e790746SPaolo Bonzini 14036e790746SPaolo Bonzini return features; 14046e790746SPaolo Bonzini } 14056e790746SPaolo Bonzini 14066e790746SPaolo Bonzini static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) 14076e790746SPaolo Bonzini { 14086e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev); 14096e790746SPaolo Bonzini 14109ffe337cSPaolo Bonzini if (!(status & (VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK))) { 14113cdaf3ddSStefan Hajnoczi assert(!s->ioeventfd_started); 14126e790746SPaolo Bonzini } 14136e790746SPaolo Bonzini 14146e790746SPaolo Bonzini if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 14156e790746SPaolo Bonzini return; 14166e790746SPaolo Bonzini } 14176e790746SPaolo Bonzini 1418ef5bc962SPaolo Bonzini /* A guest that supports VIRTIO_BLK_F_CONFIG_WCE must be able to send 1419ef5bc962SPaolo Bonzini * cache flushes. Thus, the "auto writethrough" behavior is never 1420ef5bc962SPaolo Bonzini * necessary for guests that support the VIRTIO_BLK_F_CONFIG_WCE feature. 1421ef5bc962SPaolo Bonzini * Leaving it enabled would break the following sequence: 1422ef5bc962SPaolo Bonzini * 1423ef5bc962SPaolo Bonzini * Guest started with "-drive cache=writethrough" 1424ef5bc962SPaolo Bonzini * Guest sets status to 0 1425ef5bc962SPaolo Bonzini * Guest sets DRIVER bit in status field 1426ef5bc962SPaolo Bonzini * Guest reads host features (WCE=0, CONFIG_WCE=1) 1427ef5bc962SPaolo Bonzini * Guest writes guest features (WCE=0, CONFIG_WCE=1) 1428ef5bc962SPaolo Bonzini * Guest writes 1 to the WCE configuration field (writeback mode) 1429ef5bc962SPaolo Bonzini * Guest sets DRIVER_OK bit in status field 1430ef5bc962SPaolo Bonzini * 14314be74634SMarkus Armbruster * s->blk would erroneously be placed in writethrough mode. 1432ef5bc962SPaolo Bonzini */ 143395129d6fSCornelia Huck if (!virtio_vdev_has_feature(vdev, VIRTIO_BLK_F_CONFIG_WCE)) { 14344be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, 143595129d6fSCornelia Huck virtio_vdev_has_feature(vdev, 143695129d6fSCornelia Huck VIRTIO_BLK_F_WCE)); 14376e790746SPaolo Bonzini } 1438ef5bc962SPaolo Bonzini } 14396e790746SPaolo Bonzini 1440b2b295a7SGreg Kurz static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f) 1441b2b295a7SGreg Kurz { 1442b2b295a7SGreg Kurz VirtIOBlock *s = VIRTIO_BLK(vdev); 14439c67f33fSStefan Hajnoczi 14449c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) { 1445b2b295a7SGreg Kurz VirtIOBlockReq *req = s->rq; 14466e790746SPaolo Bonzini 14476e790746SPaolo Bonzini while (req) { 14486e790746SPaolo Bonzini qemu_put_sbyte(f, 1); 144930d8bf6dSStefan Hajnoczi 145030d8bf6dSStefan Hajnoczi if (s->conf.num_queues > 1) { 145130d8bf6dSStefan Hajnoczi qemu_put_be32(f, virtio_get_queue_index(req->vq)); 145230d8bf6dSStefan Hajnoczi } 145330d8bf6dSStefan Hajnoczi 145486044b24SJason Wang qemu_put_virtqueue_element(vdev, f, &req->elem); 14556e790746SPaolo Bonzini req = req->next; 14566e790746SPaolo Bonzini } 14579c67f33fSStefan Hajnoczi } 14589c67f33fSStefan Hajnoczi 14596e790746SPaolo Bonzini qemu_put_sbyte(f, 0); 14606e790746SPaolo Bonzini } 14616e790746SPaolo Bonzini 1462b2b295a7SGreg Kurz static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f, 1463b2b295a7SGreg Kurz int version_id) 1464b2b295a7SGreg Kurz { 1465b2b295a7SGreg Kurz VirtIOBlock *s = VIRTIO_BLK(vdev); 1466b2b295a7SGreg Kurz 14676e790746SPaolo Bonzini while (qemu_get_sbyte(f)) { 146830d8bf6dSStefan Hajnoczi unsigned nvqs = s->conf.num_queues; 146930d8bf6dSStefan Hajnoczi unsigned vq_idx = 0; 1470ab281c17SPaolo Bonzini VirtIOBlockReq *req; 147130d8bf6dSStefan Hajnoczi 147230d8bf6dSStefan Hajnoczi if (nvqs > 1) { 147330d8bf6dSStefan Hajnoczi vq_idx = qemu_get_be32(f); 147430d8bf6dSStefan Hajnoczi 147530d8bf6dSStefan Hajnoczi if (vq_idx >= nvqs) { 147630d8bf6dSStefan Hajnoczi error_report("Invalid virtqueue index in request list: %#x", 147730d8bf6dSStefan Hajnoczi vq_idx); 147830d8bf6dSStefan Hajnoczi return -EINVAL; 147930d8bf6dSStefan Hajnoczi } 148030d8bf6dSStefan Hajnoczi } 148130d8bf6dSStefan Hajnoczi 14828607f5c3SJason Wang req = qemu_get_virtqueue_element(vdev, f, sizeof(VirtIOBlockReq)); 148330d8bf6dSStefan Hajnoczi virtio_blk_init_request(s, virtio_get_queue(vdev, vq_idx), req); 14849c67f33fSStefan Hajnoczi 14859c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) { 14866e790746SPaolo Bonzini req->next = s->rq; 14876e790746SPaolo Bonzini s->rq = req; 14886e790746SPaolo Bonzini } 14899c67f33fSStefan Hajnoczi } 14906e790746SPaolo Bonzini 14916e790746SPaolo Bonzini return 0; 14926e790746SPaolo Bonzini } 14936e790746SPaolo Bonzini 14949b92fbcfSSergio Lopez static void virtio_resize_cb(void *opaque) 14959b92fbcfSSergio Lopez { 14969b92fbcfSSergio Lopez VirtIODevice *vdev = opaque; 14979b92fbcfSSergio Lopez 14989b92fbcfSSergio Lopez assert(qemu_get_current_aio_context() == qemu_get_aio_context()); 14999b92fbcfSSergio Lopez virtio_notify_config(vdev); 15009b92fbcfSSergio Lopez } 15019b92fbcfSSergio Lopez 15026e790746SPaolo Bonzini static void virtio_blk_resize(void *opaque) 15036e790746SPaolo Bonzini { 15046e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(opaque); 15056e790746SPaolo Bonzini 15069b92fbcfSSergio Lopez /* 15070b2675c4SStefan Hajnoczi * virtio_notify_config() needs to acquire the BQL, 15089b92fbcfSSergio Lopez * so it can't be called from an iothread. Instead, schedule 15099b92fbcfSSergio Lopez * it to be run in the main context BH. 15109b92fbcfSSergio Lopez */ 15119b92fbcfSSergio Lopez aio_bh_schedule_oneshot(qemu_get_aio_context(), virtio_resize_cb, vdev); 15126e790746SPaolo Bonzini } 15136e790746SPaolo Bonzini 15143cdaf3ddSStefan Hajnoczi static void virtio_blk_ioeventfd_detach(VirtIOBlock *s) 15153bcc17f0SStefan Hajnoczi { 15163bcc17f0SStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s); 15173bcc17f0SStefan Hajnoczi 15183bcc17f0SStefan Hajnoczi for (uint16_t i = 0; i < s->conf.num_queues; i++) { 15193bcc17f0SStefan Hajnoczi VirtQueue *vq = virtio_get_queue(vdev, i); 15203bcc17f0SStefan Hajnoczi virtio_queue_aio_detach_host_notifier(vq, s->vq_aio_context[i]); 15213bcc17f0SStefan Hajnoczi } 15223bcc17f0SStefan Hajnoczi } 15233bcc17f0SStefan Hajnoczi 15243cdaf3ddSStefan Hajnoczi static void virtio_blk_ioeventfd_attach(VirtIOBlock *s) 15253bcc17f0SStefan Hajnoczi { 15263bcc17f0SStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s); 15273bcc17f0SStefan Hajnoczi 15283bcc17f0SStefan Hajnoczi for (uint16_t i = 0; i < s->conf.num_queues; i++) { 15293bcc17f0SStefan Hajnoczi VirtQueue *vq = virtio_get_queue(vdev, i); 15303bcc17f0SStefan Hajnoczi virtio_queue_aio_attach_host_notifier(vq, s->vq_aio_context[i]); 15313bcc17f0SStefan Hajnoczi } 15323bcc17f0SStefan Hajnoczi } 15333bcc17f0SStefan Hajnoczi 15341665d932SStefan Hajnoczi /* Suspend virtqueue ioeventfd processing during drain */ 15351665d932SStefan Hajnoczi static void virtio_blk_drained_begin(void *opaque) 15361665d932SStefan Hajnoczi { 15371665d932SStefan Hajnoczi VirtIOBlock *s = opaque; 15381665d932SStefan Hajnoczi 15393cdaf3ddSStefan Hajnoczi if (s->ioeventfd_started) { 15403cdaf3ddSStefan Hajnoczi virtio_blk_ioeventfd_detach(s); 15411665d932SStefan Hajnoczi } 15421665d932SStefan Hajnoczi } 15431665d932SStefan Hajnoczi 15441665d932SStefan Hajnoczi /* Resume virtqueue ioeventfd processing after drain */ 15451665d932SStefan Hajnoczi static void virtio_blk_drained_end(void *opaque) 15461665d932SStefan Hajnoczi { 15471665d932SStefan Hajnoczi VirtIOBlock *s = opaque; 15481665d932SStefan Hajnoczi 15493cdaf3ddSStefan Hajnoczi if (s->ioeventfd_started) { 15503cdaf3ddSStefan Hajnoczi virtio_blk_ioeventfd_attach(s); 15511665d932SStefan Hajnoczi } 15521665d932SStefan Hajnoczi } 15531665d932SStefan Hajnoczi 15546e790746SPaolo Bonzini static const BlockDevOps virtio_block_ops = { 15556e790746SPaolo Bonzini .resize_cb = virtio_blk_resize, 15561665d932SStefan Hajnoczi .drained_begin = virtio_blk_drained_begin, 15571665d932SStefan Hajnoczi .drained_end = virtio_blk_drained_end, 15586e790746SPaolo Bonzini }; 15596e790746SPaolo Bonzini 15601f995a47SStefan Hajnoczi static bool 15611f995a47SStefan Hajnoczi validate_iothread_vq_mapping_list(IOThreadVirtQueueMappingList *list, 15621f995a47SStefan Hajnoczi uint16_t num_queues, Error **errp) 15631f995a47SStefan Hajnoczi { 15641f995a47SStefan Hajnoczi g_autofree unsigned long *vqs = bitmap_new(num_queues); 15651f995a47SStefan Hajnoczi g_autoptr(GHashTable) iothreads = 15661f995a47SStefan Hajnoczi g_hash_table_new(g_str_hash, g_str_equal); 15671f995a47SStefan Hajnoczi 15681f995a47SStefan Hajnoczi for (IOThreadVirtQueueMappingList *node = list; node; node = node->next) { 15691f995a47SStefan Hajnoczi const char *name = node->value->iothread; 15701f995a47SStefan Hajnoczi uint16List *vq; 15711f995a47SStefan Hajnoczi 15721f995a47SStefan Hajnoczi if (!iothread_by_id(name)) { 15731f995a47SStefan Hajnoczi error_setg(errp, "IOThread \"%s\" object does not exist", name); 15741f995a47SStefan Hajnoczi return false; 15751f995a47SStefan Hajnoczi } 15761f995a47SStefan Hajnoczi 15771f995a47SStefan Hajnoczi if (!g_hash_table_add(iothreads, (gpointer)name)) { 15781f995a47SStefan Hajnoczi error_setg(errp, 15791f995a47SStefan Hajnoczi "duplicate IOThread name \"%s\" in iothread-vq-mapping", 15801f995a47SStefan Hajnoczi name); 15811f995a47SStefan Hajnoczi return false; 15821f995a47SStefan Hajnoczi } 15831f995a47SStefan Hajnoczi 15841f995a47SStefan Hajnoczi if (node != list) { 15851f995a47SStefan Hajnoczi if (!!node->value->vqs != !!list->value->vqs) { 15861f995a47SStefan Hajnoczi error_setg(errp, "either all items in iothread-vq-mapping " 15871f995a47SStefan Hajnoczi "must have vqs or none of them must have it"); 15881f995a47SStefan Hajnoczi return false; 15891f995a47SStefan Hajnoczi } 15901f995a47SStefan Hajnoczi } 15911f995a47SStefan Hajnoczi 15921f995a47SStefan Hajnoczi for (vq = node->value->vqs; vq; vq = vq->next) { 15931f995a47SStefan Hajnoczi if (vq->value >= num_queues) { 15941f995a47SStefan Hajnoczi error_setg(errp, "vq index %u for IOThread \"%s\" must be " 15951f995a47SStefan Hajnoczi "less than num_queues %u in iothread-vq-mapping", 15961f995a47SStefan Hajnoczi vq->value, name, num_queues); 15971f995a47SStefan Hajnoczi return false; 15981f995a47SStefan Hajnoczi } 15991f995a47SStefan Hajnoczi 16001f995a47SStefan Hajnoczi if (test_and_set_bit(vq->value, vqs)) { 16011f995a47SStefan Hajnoczi error_setg(errp, "cannot assign vq %u to IOThread \"%s\" " 16021f995a47SStefan Hajnoczi "because it is already assigned", vq->value, name); 16031f995a47SStefan Hajnoczi return false; 16041f995a47SStefan Hajnoczi } 16051f995a47SStefan Hajnoczi } 16061f995a47SStefan Hajnoczi } 16071f995a47SStefan Hajnoczi 16081f995a47SStefan Hajnoczi if (list->value->vqs) { 16091f995a47SStefan Hajnoczi for (uint16_t i = 0; i < num_queues; i++) { 16101f995a47SStefan Hajnoczi if (!test_bit(i, vqs)) { 16111f995a47SStefan Hajnoczi error_setg(errp, 16121f995a47SStefan Hajnoczi "missing vq %u IOThread assignment in iothread-vq-mapping", 16131f995a47SStefan Hajnoczi i); 16141f995a47SStefan Hajnoczi return false; 16151f995a47SStefan Hajnoczi } 16161f995a47SStefan Hajnoczi } 16171f995a47SStefan Hajnoczi } 16181f995a47SStefan Hajnoczi 16191f995a47SStefan Hajnoczi return true; 16201f995a47SStefan Hajnoczi } 16211f995a47SStefan Hajnoczi 16221f995a47SStefan Hajnoczi /** 16231f995a47SStefan Hajnoczi * apply_iothread_vq_mapping: 16241f995a47SStefan Hajnoczi * @iothread_vq_mapping_list: The mapping of virtqueues to IOThreads. 16251f995a47SStefan Hajnoczi * @vq_aio_context: The array of AioContext pointers to fill in. 16261f995a47SStefan Hajnoczi * @num_queues: The length of @vq_aio_context. 16271f995a47SStefan Hajnoczi * @errp: If an error occurs, a pointer to the area to store the error. 16281f995a47SStefan Hajnoczi * 16291f995a47SStefan Hajnoczi * Fill in the AioContext for each virtqueue in the @vq_aio_context array given 16301f995a47SStefan Hajnoczi * the iothread-vq-mapping parameter in @iothread_vq_mapping_list. 16311f995a47SStefan Hajnoczi * 16321f995a47SStefan Hajnoczi * Returns: %true on success, %false on failure. 16331f995a47SStefan Hajnoczi **/ 16341f995a47SStefan Hajnoczi static bool apply_iothread_vq_mapping( 16351f995a47SStefan Hajnoczi IOThreadVirtQueueMappingList *iothread_vq_mapping_list, 16361f995a47SStefan Hajnoczi AioContext **vq_aio_context, 16371f995a47SStefan Hajnoczi uint16_t num_queues, 16381f995a47SStefan Hajnoczi Error **errp) 16393bcc17f0SStefan Hajnoczi { 16403bcc17f0SStefan Hajnoczi IOThreadVirtQueueMappingList *node; 16413bcc17f0SStefan Hajnoczi size_t num_iothreads = 0; 16423bcc17f0SStefan Hajnoczi size_t cur_iothread = 0; 16433bcc17f0SStefan Hajnoczi 16441f995a47SStefan Hajnoczi if (!validate_iothread_vq_mapping_list(iothread_vq_mapping_list, 16451f995a47SStefan Hajnoczi num_queues, errp)) { 16461f995a47SStefan Hajnoczi return false; 16471f995a47SStefan Hajnoczi } 16481f995a47SStefan Hajnoczi 16493bcc17f0SStefan Hajnoczi for (node = iothread_vq_mapping_list; node; node = node->next) { 16503bcc17f0SStefan Hajnoczi num_iothreads++; 16513bcc17f0SStefan Hajnoczi } 16523bcc17f0SStefan Hajnoczi 16533bcc17f0SStefan Hajnoczi for (node = iothread_vq_mapping_list; node; node = node->next) { 16543bcc17f0SStefan Hajnoczi IOThread *iothread = iothread_by_id(node->value->iothread); 16553bcc17f0SStefan Hajnoczi AioContext *ctx = iothread_get_aio_context(iothread); 16563bcc17f0SStefan Hajnoczi 165757bc2658SStefan Hajnoczi /* Released in virtio_blk_vq_aio_context_cleanup() */ 16583bcc17f0SStefan Hajnoczi object_ref(OBJECT(iothread)); 16593bcc17f0SStefan Hajnoczi 16603bcc17f0SStefan Hajnoczi if (node->value->vqs) { 16613bcc17f0SStefan Hajnoczi uint16List *vq; 16623bcc17f0SStefan Hajnoczi 16633bcc17f0SStefan Hajnoczi /* Explicit vq:IOThread assignment */ 16643bcc17f0SStefan Hajnoczi for (vq = node->value->vqs; vq; vq = vq->next) { 16651f995a47SStefan Hajnoczi assert(vq->value < num_queues); 16663bcc17f0SStefan Hajnoczi vq_aio_context[vq->value] = ctx; 16673bcc17f0SStefan Hajnoczi } 16683bcc17f0SStefan Hajnoczi } else { 16693bcc17f0SStefan Hajnoczi /* Round-robin vq:IOThread assignment */ 16703bcc17f0SStefan Hajnoczi for (unsigned i = cur_iothread; i < num_queues; 16713bcc17f0SStefan Hajnoczi i += num_iothreads) { 16723bcc17f0SStefan Hajnoczi vq_aio_context[i] = ctx; 16733bcc17f0SStefan Hajnoczi } 16743bcc17f0SStefan Hajnoczi } 16753bcc17f0SStefan Hajnoczi 16763bcc17f0SStefan Hajnoczi cur_iothread++; 16773bcc17f0SStefan Hajnoczi } 16781f995a47SStefan Hajnoczi 16791f995a47SStefan Hajnoczi return true; 16803bcc17f0SStefan Hajnoczi } 16813bcc17f0SStefan Hajnoczi 16823bcc17f0SStefan Hajnoczi /* Context: BQL held */ 168357bc2658SStefan Hajnoczi static bool virtio_blk_vq_aio_context_init(VirtIOBlock *s, Error **errp) 16843bcc17f0SStefan Hajnoczi { 16853bcc17f0SStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s); 16863bcc17f0SStefan Hajnoczi VirtIOBlkConf *conf = &s->conf; 16873bcc17f0SStefan Hajnoczi BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); 16883bcc17f0SStefan Hajnoczi VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); 16893bcc17f0SStefan Hajnoczi 16901f995a47SStefan Hajnoczi if (conf->iothread && conf->iothread_vq_mapping_list) { 16911f995a47SStefan Hajnoczi error_setg(errp, 16921f995a47SStefan Hajnoczi "iothread and iothread-vq-mapping properties cannot be set " 16931f995a47SStefan Hajnoczi "at the same time"); 16941f995a47SStefan Hajnoczi return false; 16951f995a47SStefan Hajnoczi } 16961f995a47SStefan Hajnoczi 16973bcc17f0SStefan Hajnoczi if (conf->iothread || conf->iothread_vq_mapping_list) { 16983bcc17f0SStefan Hajnoczi if (!k->set_guest_notifiers || !k->ioeventfd_assign) { 16993bcc17f0SStefan Hajnoczi error_setg(errp, 17003bcc17f0SStefan Hajnoczi "device is incompatible with iothread " 17013bcc17f0SStefan Hajnoczi "(transport does not support notifiers)"); 17023bcc17f0SStefan Hajnoczi return false; 17033bcc17f0SStefan Hajnoczi } 17043bcc17f0SStefan Hajnoczi if (!virtio_device_ioeventfd_enabled(vdev)) { 17053bcc17f0SStefan Hajnoczi error_setg(errp, "ioeventfd is required for iothread"); 17063bcc17f0SStefan Hajnoczi return false; 17073bcc17f0SStefan Hajnoczi } 17083bcc17f0SStefan Hajnoczi 17093bcc17f0SStefan Hajnoczi /* 17103cdaf3ddSStefan Hajnoczi * If ioeventfd is (re-)enabled while the guest is running there could 17113bcc17f0SStefan Hajnoczi * be block jobs that can conflict. 17123bcc17f0SStefan Hajnoczi */ 17133bcc17f0SStefan Hajnoczi if (blk_op_is_blocked(conf->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) { 17143cdaf3ddSStefan Hajnoczi error_prepend(errp, "cannot start virtio-blk ioeventfd: "); 17153bcc17f0SStefan Hajnoczi return false; 17163bcc17f0SStefan Hajnoczi } 17173bcc17f0SStefan Hajnoczi } 17183bcc17f0SStefan Hajnoczi 17193bcc17f0SStefan Hajnoczi s->vq_aio_context = g_new(AioContext *, conf->num_queues); 17203bcc17f0SStefan Hajnoczi 17213bcc17f0SStefan Hajnoczi if (conf->iothread_vq_mapping_list) { 17221f995a47SStefan Hajnoczi if (!apply_iothread_vq_mapping(conf->iothread_vq_mapping_list, 17231f995a47SStefan Hajnoczi s->vq_aio_context, 17241f995a47SStefan Hajnoczi conf->num_queues, 17251f995a47SStefan Hajnoczi errp)) { 17261f995a47SStefan Hajnoczi g_free(s->vq_aio_context); 17271f995a47SStefan Hajnoczi s->vq_aio_context = NULL; 17281f995a47SStefan Hajnoczi return false; 17291f995a47SStefan Hajnoczi } 17303bcc17f0SStefan Hajnoczi } else if (conf->iothread) { 17313bcc17f0SStefan Hajnoczi AioContext *ctx = iothread_get_aio_context(conf->iothread); 17323bcc17f0SStefan Hajnoczi for (unsigned i = 0; i < conf->num_queues; i++) { 17333bcc17f0SStefan Hajnoczi s->vq_aio_context[i] = ctx; 17343bcc17f0SStefan Hajnoczi } 17353bcc17f0SStefan Hajnoczi 173657bc2658SStefan Hajnoczi /* Released in virtio_blk_vq_aio_context_cleanup() */ 17373bcc17f0SStefan Hajnoczi object_ref(OBJECT(conf->iothread)); 17383bcc17f0SStefan Hajnoczi } else { 17393bcc17f0SStefan Hajnoczi AioContext *ctx = qemu_get_aio_context(); 17403bcc17f0SStefan Hajnoczi for (unsigned i = 0; i < conf->num_queues; i++) { 17413bcc17f0SStefan Hajnoczi s->vq_aio_context[i] = ctx; 17423bcc17f0SStefan Hajnoczi } 17433bcc17f0SStefan Hajnoczi } 17443bcc17f0SStefan Hajnoczi 17453bcc17f0SStefan Hajnoczi return true; 17463bcc17f0SStefan Hajnoczi } 17473bcc17f0SStefan Hajnoczi 17483bcc17f0SStefan Hajnoczi /* Context: BQL held */ 174957bc2658SStefan Hajnoczi static void virtio_blk_vq_aio_context_cleanup(VirtIOBlock *s) 17503bcc17f0SStefan Hajnoczi { 17513bcc17f0SStefan Hajnoczi VirtIOBlkConf *conf = &s->conf; 17523bcc17f0SStefan Hajnoczi 17533cdaf3ddSStefan Hajnoczi assert(!s->ioeventfd_started); 17543bcc17f0SStefan Hajnoczi 17553bcc17f0SStefan Hajnoczi if (conf->iothread_vq_mapping_list) { 17563bcc17f0SStefan Hajnoczi IOThreadVirtQueueMappingList *node; 17573bcc17f0SStefan Hajnoczi 17583bcc17f0SStefan Hajnoczi for (node = conf->iothread_vq_mapping_list; node; node = node->next) { 17593bcc17f0SStefan Hajnoczi IOThread *iothread = iothread_by_id(node->value->iothread); 17603bcc17f0SStefan Hajnoczi object_unref(OBJECT(iothread)); 17613bcc17f0SStefan Hajnoczi } 17623bcc17f0SStefan Hajnoczi } 17633bcc17f0SStefan Hajnoczi 17643bcc17f0SStefan Hajnoczi if (conf->iothread) { 17653bcc17f0SStefan Hajnoczi object_unref(OBJECT(conf->iothread)); 17663bcc17f0SStefan Hajnoczi } 17673bcc17f0SStefan Hajnoczi 17683bcc17f0SStefan Hajnoczi g_free(s->vq_aio_context); 17693bcc17f0SStefan Hajnoczi s->vq_aio_context = NULL; 17703bcc17f0SStefan Hajnoczi } 17713bcc17f0SStefan Hajnoczi 17723bcc17f0SStefan Hajnoczi /* Context: BQL held */ 17733cdaf3ddSStefan Hajnoczi static int virtio_blk_start_ioeventfd(VirtIODevice *vdev) 17743bcc17f0SStefan Hajnoczi { 17753bcc17f0SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(vdev); 17763bcc17f0SStefan Hajnoczi BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s))); 17773bcc17f0SStefan Hajnoczi VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); 17783bcc17f0SStefan Hajnoczi unsigned i; 17793bcc17f0SStefan Hajnoczi unsigned nvqs = s->conf.num_queues; 17803bcc17f0SStefan Hajnoczi Error *local_err = NULL; 17813bcc17f0SStefan Hajnoczi int r; 17823bcc17f0SStefan Hajnoczi 17833cdaf3ddSStefan Hajnoczi if (s->ioeventfd_started || s->ioeventfd_starting) { 17843bcc17f0SStefan Hajnoczi return 0; 17853bcc17f0SStefan Hajnoczi } 17863bcc17f0SStefan Hajnoczi 17873cdaf3ddSStefan Hajnoczi s->ioeventfd_starting = true; 17883bcc17f0SStefan Hajnoczi 17893bcc17f0SStefan Hajnoczi /* Set up guest notifier (irq) */ 17903bcc17f0SStefan Hajnoczi r = k->set_guest_notifiers(qbus->parent, nvqs, true); 17913bcc17f0SStefan Hajnoczi if (r != 0) { 17923bcc17f0SStefan Hajnoczi error_report("virtio-blk failed to set guest notifier (%d), " 17933bcc17f0SStefan Hajnoczi "ensure -accel kvm is set.", r); 17943bcc17f0SStefan Hajnoczi goto fail_guest_notifiers; 17953bcc17f0SStefan Hajnoczi } 17963bcc17f0SStefan Hajnoczi 17973bcc17f0SStefan Hajnoczi /* 17983bcc17f0SStefan Hajnoczi * Batch all the host notifiers in a single transaction to avoid 17993bcc17f0SStefan Hajnoczi * quadratic time complexity in address_space_update_ioeventfds(). 18003bcc17f0SStefan Hajnoczi */ 18013bcc17f0SStefan Hajnoczi memory_region_transaction_begin(); 18023bcc17f0SStefan Hajnoczi 18033bcc17f0SStefan Hajnoczi /* Set up virtqueue notify */ 18043bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) { 18053bcc17f0SStefan Hajnoczi r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, true); 18063bcc17f0SStefan Hajnoczi if (r != 0) { 18073bcc17f0SStefan Hajnoczi int j = i; 18083bcc17f0SStefan Hajnoczi 18093bcc17f0SStefan Hajnoczi fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r); 18103bcc17f0SStefan Hajnoczi while (i--) { 18113bcc17f0SStefan Hajnoczi virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false); 18123bcc17f0SStefan Hajnoczi } 18133bcc17f0SStefan Hajnoczi 18143bcc17f0SStefan Hajnoczi /* 18153bcc17f0SStefan Hajnoczi * The transaction expects the ioeventfds to be open when it 18163bcc17f0SStefan Hajnoczi * commits. Do it now, before the cleanup loop. 18173bcc17f0SStefan Hajnoczi */ 18183bcc17f0SStefan Hajnoczi memory_region_transaction_commit(); 18193bcc17f0SStefan Hajnoczi 18203bcc17f0SStefan Hajnoczi while (j--) { 18213bcc17f0SStefan Hajnoczi virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), j); 18223bcc17f0SStefan Hajnoczi } 18233bcc17f0SStefan Hajnoczi goto fail_host_notifiers; 18243bcc17f0SStefan Hajnoczi } 18253bcc17f0SStefan Hajnoczi } 18263bcc17f0SStefan Hajnoczi 18273bcc17f0SStefan Hajnoczi memory_region_transaction_commit(); 18283bcc17f0SStefan Hajnoczi 1829ea0736d7SStefan Hajnoczi /* 1830ea0736d7SStefan Hajnoczi * Try to change the AioContext so that block jobs and other operations can 1831ea0736d7SStefan Hajnoczi * co-locate their activity in the same AioContext. If it fails, nevermind. 1832ea0736d7SStefan Hajnoczi */ 18335fbcbd50SStefan Hajnoczi assert(nvqs > 0); /* enforced during ->realize() */ 18343bcc17f0SStefan Hajnoczi r = blk_set_aio_context(s->conf.conf.blk, s->vq_aio_context[0], 18353bcc17f0SStefan Hajnoczi &local_err); 18363bcc17f0SStefan Hajnoczi if (r < 0) { 1837ea0736d7SStefan Hajnoczi warn_report_err(local_err); 18383bcc17f0SStefan Hajnoczi } 18393bcc17f0SStefan Hajnoczi 18403bcc17f0SStefan Hajnoczi /* 18413bcc17f0SStefan Hajnoczi * These fields must be visible to the IOThread when it processes the 18423cdaf3ddSStefan Hajnoczi * virtqueue, otherwise it will think ioeventfd has not started yet. 18433bcc17f0SStefan Hajnoczi * 18443cdaf3ddSStefan Hajnoczi * Make sure ->ioeventfd_started is false when blk_set_aio_context() is 18453bcc17f0SStefan Hajnoczi * called above so that draining does not cause the host notifier to be 18463bcc17f0SStefan Hajnoczi * detached/attached prematurely. 18473bcc17f0SStefan Hajnoczi */ 18483cdaf3ddSStefan Hajnoczi s->ioeventfd_starting = false; 18493cdaf3ddSStefan Hajnoczi s->ioeventfd_started = true; 18503bcc17f0SStefan Hajnoczi smp_wmb(); /* paired with aio_notify_accept() on the read side */ 18513bcc17f0SStefan Hajnoczi 185252bff01fSHanna Czenczek /* 185352bff01fSHanna Czenczek * Get this show started by hooking up our callbacks. If drained now, 185452bff01fSHanna Czenczek * virtio_blk_drained_end() will do this later. 185552bff01fSHanna Czenczek * Attaching the notifier also kicks the virtqueues, processing any requests 185652bff01fSHanna Czenczek * they may already have. 185752bff01fSHanna Czenczek */ 1858d3f6f294SStefan Hajnoczi if (!blk_in_drain(s->conf.conf.blk)) { 185952bff01fSHanna Czenczek virtio_blk_ioeventfd_attach(s); 18603bcc17f0SStefan Hajnoczi } 18613bcc17f0SStefan Hajnoczi return 0; 18623bcc17f0SStefan Hajnoczi 18633bcc17f0SStefan Hajnoczi fail_host_notifiers: 18643bcc17f0SStefan Hajnoczi k->set_guest_notifiers(qbus->parent, nvqs, false); 18653bcc17f0SStefan Hajnoczi fail_guest_notifiers: 18663cdaf3ddSStefan Hajnoczi s->ioeventfd_disabled = true; 18673cdaf3ddSStefan Hajnoczi s->ioeventfd_starting = false; 18683bcc17f0SStefan Hajnoczi return -ENOSYS; 18693bcc17f0SStefan Hajnoczi } 18703bcc17f0SStefan Hajnoczi 18713bcc17f0SStefan Hajnoczi /* Stop notifications for new requests from guest. 18723bcc17f0SStefan Hajnoczi * 18733bcc17f0SStefan Hajnoczi * Context: BH in IOThread 18743bcc17f0SStefan Hajnoczi */ 18753cdaf3ddSStefan Hajnoczi static void virtio_blk_ioeventfd_stop_vq_bh(void *opaque) 18763bcc17f0SStefan Hajnoczi { 18773bcc17f0SStefan Hajnoczi VirtQueue *vq = opaque; 18783bcc17f0SStefan Hajnoczi EventNotifier *host_notifier = virtio_queue_get_host_notifier(vq); 18793bcc17f0SStefan Hajnoczi 18803bcc17f0SStefan Hajnoczi virtio_queue_aio_detach_host_notifier(vq, qemu_get_current_aio_context()); 18813bcc17f0SStefan Hajnoczi 18823bcc17f0SStefan Hajnoczi /* 18833bcc17f0SStefan Hajnoczi * Test and clear notifier after disabling event, in case poll callback 18843bcc17f0SStefan Hajnoczi * didn't have time to run. 18853bcc17f0SStefan Hajnoczi */ 18863bcc17f0SStefan Hajnoczi virtio_queue_host_notifier_read(host_notifier); 18873bcc17f0SStefan Hajnoczi } 18883bcc17f0SStefan Hajnoczi 18893bcc17f0SStefan Hajnoczi /* Context: BQL held */ 18903cdaf3ddSStefan Hajnoczi static void virtio_blk_stop_ioeventfd(VirtIODevice *vdev) 18913bcc17f0SStefan Hajnoczi { 18923bcc17f0SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(vdev); 18933bcc17f0SStefan Hajnoczi BusState *qbus = qdev_get_parent_bus(DEVICE(s)); 18943bcc17f0SStefan Hajnoczi VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); 18953bcc17f0SStefan Hajnoczi unsigned i; 18963bcc17f0SStefan Hajnoczi unsigned nvqs = s->conf.num_queues; 18973bcc17f0SStefan Hajnoczi 18983cdaf3ddSStefan Hajnoczi if (!s->ioeventfd_started || s->ioeventfd_stopping) { 18993bcc17f0SStefan Hajnoczi return; 19003bcc17f0SStefan Hajnoczi } 19013bcc17f0SStefan Hajnoczi 19023bcc17f0SStefan Hajnoczi /* Better luck next time. */ 19033cdaf3ddSStefan Hajnoczi if (s->ioeventfd_disabled) { 19043cdaf3ddSStefan Hajnoczi s->ioeventfd_disabled = false; 19053cdaf3ddSStefan Hajnoczi s->ioeventfd_started = false; 19063bcc17f0SStefan Hajnoczi return; 19073bcc17f0SStefan Hajnoczi } 19083cdaf3ddSStefan Hajnoczi s->ioeventfd_stopping = true; 19093bcc17f0SStefan Hajnoczi 19103bcc17f0SStefan Hajnoczi if (!blk_in_drain(s->conf.conf.blk)) { 19113bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) { 19123bcc17f0SStefan Hajnoczi VirtQueue *vq = virtio_get_queue(vdev, i); 19133bcc17f0SStefan Hajnoczi AioContext *ctx = s->vq_aio_context[i]; 19143bcc17f0SStefan Hajnoczi 19153cdaf3ddSStefan Hajnoczi aio_wait_bh_oneshot(ctx, virtio_blk_ioeventfd_stop_vq_bh, vq); 19163bcc17f0SStefan Hajnoczi } 19173bcc17f0SStefan Hajnoczi } 19183bcc17f0SStefan Hajnoczi 19193bcc17f0SStefan Hajnoczi /* 19203bcc17f0SStefan Hajnoczi * Batch all the host notifiers in a single transaction to avoid 19213bcc17f0SStefan Hajnoczi * quadratic time complexity in address_space_update_ioeventfds(). 19223bcc17f0SStefan Hajnoczi */ 19233bcc17f0SStefan Hajnoczi memory_region_transaction_begin(); 19243bcc17f0SStefan Hajnoczi 19253bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) { 19263bcc17f0SStefan Hajnoczi virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false); 19273bcc17f0SStefan Hajnoczi } 19283bcc17f0SStefan Hajnoczi 19293bcc17f0SStefan Hajnoczi /* 19303bcc17f0SStefan Hajnoczi * The transaction expects the ioeventfds to be open when it 19313bcc17f0SStefan Hajnoczi * commits. Do it now, before the cleanup loop. 19323bcc17f0SStefan Hajnoczi */ 19333bcc17f0SStefan Hajnoczi memory_region_transaction_commit(); 19343bcc17f0SStefan Hajnoczi 19353bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) { 19363bcc17f0SStefan Hajnoczi virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i); 19373bcc17f0SStefan Hajnoczi } 19383bcc17f0SStefan Hajnoczi 19393bcc17f0SStefan Hajnoczi /* 19403cdaf3ddSStefan Hajnoczi * Set ->ioeventfd_started to false before draining so that host notifiers 19413bcc17f0SStefan Hajnoczi * are not detached/attached anymore. 19423bcc17f0SStefan Hajnoczi */ 19433cdaf3ddSStefan Hajnoczi s->ioeventfd_started = false; 19443bcc17f0SStefan Hajnoczi 19453bcc17f0SStefan Hajnoczi /* Wait for virtio_blk_dma_restart_bh() and in flight I/O to complete */ 19463bcc17f0SStefan Hajnoczi blk_drain(s->conf.conf.blk); 19473bcc17f0SStefan Hajnoczi 19483bcc17f0SStefan Hajnoczi /* 19493bcc17f0SStefan Hajnoczi * Try to switch bs back to the QEMU main loop. If other users keep the 19503bcc17f0SStefan Hajnoczi * BlockBackend in the iothread, that's ok 19513bcc17f0SStefan Hajnoczi */ 19523bcc17f0SStefan Hajnoczi blk_set_aio_context(s->conf.conf.blk, qemu_get_aio_context(), NULL); 19533bcc17f0SStefan Hajnoczi 19543bcc17f0SStefan Hajnoczi /* Clean up guest notifier (irq) */ 19553bcc17f0SStefan Hajnoczi k->set_guest_notifiers(qbus->parent, nvqs, false); 19563bcc17f0SStefan Hajnoczi 19573cdaf3ddSStefan Hajnoczi s->ioeventfd_stopping = false; 19583bcc17f0SStefan Hajnoczi } 19593bcc17f0SStefan Hajnoczi 196075884afdSAndreas Färber static void virtio_blk_device_realize(DeviceState *dev, Error **errp) 19616e790746SPaolo Bonzini { 196275884afdSAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1963179b417eSAndreas Färber VirtIOBlock *s = VIRTIO_BLK(dev); 19642a30307fSMarkus Armbruster VirtIOBlkConf *conf = &s->conf; 1965b3d9bb9aSStefan Hajnoczi BlockDriverState *bs; 19663ffeeef7SAndreas Färber Error *err = NULL; 19672f270590SStefan Hajnoczi unsigned i; 19686e790746SPaolo Bonzini 19694be74634SMarkus Armbruster if (!conf->conf.blk) { 197075884afdSAndreas Färber error_setg(errp, "drive property not set"); 197175884afdSAndreas Färber return; 19726e790746SPaolo Bonzini } 19734be74634SMarkus Armbruster if (!blk_is_inserted(conf->conf.blk)) { 197475884afdSAndreas Färber error_setg(errp, "Device needs media, but drive is empty"); 197575884afdSAndreas Färber return; 19766e790746SPaolo Bonzini } 19779445e1e1SStefan Hajnoczi if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) { 19789445e1e1SStefan Hajnoczi conf->num_queues = 1; 19799445e1e1SStefan Hajnoczi } 19802f270590SStefan Hajnoczi if (!conf->num_queues) { 19812f270590SStefan Hajnoczi error_setg(errp, "num-queues property must be larger than 0"); 19822f270590SStefan Hajnoczi return; 19832f270590SStefan Hajnoczi } 19841bf8a989SDenis Plotnikov if (conf->queue_size <= 2) { 19851bf8a989SDenis Plotnikov error_setg(errp, "invalid queue-size property (%" PRIu16 "), " 19861bf8a989SDenis Plotnikov "must be > 2", conf->queue_size); 19871bf8a989SDenis Plotnikov return; 19881bf8a989SDenis Plotnikov } 19896040aeddSMark Kanda if (!is_power_of_2(conf->queue_size) || 19906040aeddSMark Kanda conf->queue_size > VIRTQUEUE_MAX_SIZE) { 19916040aeddSMark Kanda error_setg(errp, "invalid queue-size property (%" PRIu16 "), " 19926040aeddSMark Kanda "must be a power of 2 (max %d)", 19936040aeddSMark Kanda conf->queue_size, VIRTQUEUE_MAX_SIZE); 19946040aeddSMark Kanda return; 19956040aeddSMark Kanda } 19966e790746SPaolo Bonzini 1997ceff3e1fSMao Zhongyi if (!blkconf_apply_backend_options(&conf->conf, 199886b1cf32SKevin Wolf !blk_supports_write_perm(conf->conf.blk), 199986b1cf32SKevin Wolf true, errp)) { 2000a17c17a2SKevin Wolf return; 2001a17c17a2SKevin Wolf } 20024be74634SMarkus Armbruster s->original_wce = blk_enable_write_cache(conf->conf.blk); 2003ceff3e1fSMao Zhongyi if (!blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, errp)) { 200475884afdSAndreas Färber return; 20056e790746SPaolo Bonzini } 2006ceff3e1fSMao Zhongyi 2007c56ee92fSRoman Kagan if (!blkconf_blocksizes(&conf->conf, errp)) { 20080a75b60cSMark Kanda return; 20090a75b60cSMark Kanda } 20100a75b60cSMark Kanda 2011b3d9bb9aSStefan Hajnoczi bs = blk_bs(conf->conf.blk); 20124f736650SSam Li if (bs->bl.zoned != BLK_Z_NONE) { 20134f736650SSam Li virtio_add_feature(&s->host_features, VIRTIO_BLK_F_ZONED); 20144f736650SSam Li if (bs->bl.zoned == BLK_Z_HM) { 20154f736650SSam Li virtio_clear_feature(&s->host_features, VIRTIO_BLK_F_DISCARD); 20164f736650SSam Li } 20174f736650SSam Li } 20184f736650SSam Li 201937b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD) && 202037b06f8dSStefano Garzarella (!conf->max_discard_sectors || 202137b06f8dSStefano Garzarella conf->max_discard_sectors > BDRV_REQUEST_MAX_SECTORS)) { 202237b06f8dSStefano Garzarella error_setg(errp, "invalid max-discard-sectors property (%" PRIu32 ")" 202337b06f8dSStefano Garzarella ", must be between 1 and %d", 202437b06f8dSStefano Garzarella conf->max_discard_sectors, (int)BDRV_REQUEST_MAX_SECTORS); 202537b06f8dSStefano Garzarella return; 202637b06f8dSStefano Garzarella } 202737b06f8dSStefano Garzarella 202837b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES) && 202937b06f8dSStefano Garzarella (!conf->max_write_zeroes_sectors || 203037b06f8dSStefano Garzarella conf->max_write_zeroes_sectors > BDRV_REQUEST_MAX_SECTORS)) { 203137b06f8dSStefano Garzarella error_setg(errp, "invalid max-write-zeroes-sectors property (%" PRIu32 203237b06f8dSStefano Garzarella "), must be between 1 and %d", 203337b06f8dSStefano Garzarella conf->max_write_zeroes_sectors, 203437b06f8dSStefano Garzarella (int)BDRV_REQUEST_MAX_SECTORS); 203537b06f8dSStefano Garzarella return; 203637b06f8dSStefano Garzarella } 203737b06f8dSStefano Garzarella 2038d9cf55a8SDaniil Tatianin s->config_size = virtio_get_config_size(&virtio_blk_cfg_size_params, 2039d74c30c8SDaniil Tatianin s->host_features); 20403857cd5cSJonah Palmer virtio_init(vdev, VIRTIO_ID_BLOCK, s->config_size); 20416e790746SPaolo Bonzini 20429c67f33fSStefan Hajnoczi qemu_mutex_init(&s->rq_lock); 20439c67f33fSStefan Hajnoczi 20444be74634SMarkus Armbruster s->blk = conf->conf.blk; 20456e790746SPaolo Bonzini s->rq = NULL; 20462a30307fSMarkus Armbruster s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1; 20476e790746SPaolo Bonzini 20482f270590SStefan Hajnoczi for (i = 0; i < conf->num_queues; i++) { 20496040aeddSMark Kanda virtio_add_queue(vdev, conf->queue_size, virtio_blk_handle_output); 20502f270590SStefan Hajnoczi } 205198e3ab35SKevin Wolf qemu_coroutine_inc_pool_size(conf->num_queues * conf->queue_size / 2); 205257bc2658SStefan Hajnoczi 20533cdaf3ddSStefan Hajnoczi /* Don't start ioeventfd if transport does not support notifiers. */ 205457bc2658SStefan Hajnoczi if (!virtio_device_ioeventfd_enabled(vdev)) { 20553cdaf3ddSStefan Hajnoczi s->ioeventfd_disabled = true; 205657bc2658SStefan Hajnoczi } 205757bc2658SStefan Hajnoczi 205857bc2658SStefan Hajnoczi virtio_blk_vq_aio_context_init(s, &err); 20593ffeeef7SAndreas Färber if (err != NULL) { 206075884afdSAndreas Färber error_propagate(errp, err); 2061cfaf757eSPan Nengyuan for (i = 0; i < conf->num_queues; i++) { 2062cfaf757eSPan Nengyuan virtio_del_queue(vdev, i); 2063cfaf757eSPan Nengyuan } 20646a1a8cc7SKONRAD Frederic virtio_cleanup(vdev); 206575884afdSAndreas Färber return; 20666e790746SPaolo Bonzini } 20676e790746SPaolo Bonzini 2068a937f8e8SStefan Hajnoczi /* 2069a937f8e8SStefan Hajnoczi * This must be after virtio_init() so virtio_blk_dma_restart_cb() gets 2070a937f8e8SStefan Hajnoczi * called after ->start_ioeventfd() has already set blk's AioContext. 2071a937f8e8SStefan Hajnoczi */ 2072a937f8e8SStefan Hajnoczi s->change = 2073a937f8e8SStefan Hajnoczi qdev_add_vm_change_state_handler(dev, virtio_blk_dma_restart_cb, s); 2074a937f8e8SStefan Hajnoczi 2075baf42268SStefan Hajnoczi blk_ram_registrar_init(&s->blk_ram_registrar, s->blk); 20764be74634SMarkus Armbruster blk_set_dev_ops(s->blk, &virtio_block_ops, s); 20776e790746SPaolo Bonzini 20784be74634SMarkus Armbruster blk_iostatus_enable(s->blk); 207971f571a2SSam Eiderman 208071f571a2SSam Eiderman add_boot_device_lchs(dev, "/disk@0,0", 208171f571a2SSam Eiderman conf->conf.lcyls, 208271f571a2SSam Eiderman conf->conf.lheads, 208371f571a2SSam Eiderman conf->conf.lsecs); 20846e790746SPaolo Bonzini } 20856e790746SPaolo Bonzini 2086b69c3c21SMarkus Armbruster static void virtio_blk_device_unrealize(DeviceState *dev) 20876e790746SPaolo Bonzini { 2088306ec6c3SAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev); 2089306ec6c3SAndreas Färber VirtIOBlock *s = VIRTIO_BLK(dev); 20904a0117cfSEugenio Pérez VirtIOBlkConf *conf = &s->conf; 20914a0117cfSEugenio Pérez unsigned i; 2092306ec6c3SAndreas Färber 20937bfde688SJulia Suvorova blk_drain(s->blk); 209471f571a2SSam Eiderman del_boot_device_lchs(dev, "/disk@0,0"); 209557bc2658SStefan Hajnoczi virtio_blk_vq_aio_context_cleanup(s); 20964a0117cfSEugenio Pérez for (i = 0; i < conf->num_queues; i++) { 20974a0117cfSEugenio Pérez virtio_del_queue(vdev, i); 20984a0117cfSEugenio Pérez } 209998e3ab35SKevin Wolf qemu_coroutine_dec_pool_size(conf->num_queues * conf->queue_size / 2); 21009c67f33fSStefan Hajnoczi qemu_mutex_destroy(&s->rq_lock); 2101baf42268SStefan Hajnoczi blk_ram_registrar_destroy(&s->blk_ram_registrar); 21026e790746SPaolo Bonzini qemu_del_vm_change_state_handler(s->change); 21034be74634SMarkus Armbruster blockdev_mark_auto_del(s->blk); 21046a1a8cc7SKONRAD Frederic virtio_cleanup(vdev); 21056e790746SPaolo Bonzini } 21066e790746SPaolo Bonzini 2107467b3f33SStefan Hajnoczi static void virtio_blk_instance_init(Object *obj) 2108467b3f33SStefan Hajnoczi { 2109467b3f33SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(obj); 2110467b3f33SStefan Hajnoczi 21112a30307fSMarkus Armbruster device_add_bootindex_property(obj, &s->conf.conf.bootindex, 21123342ec32SGonglei "bootindex", "/disk@0,0", 211340c2281cSMarkus Armbruster DEVICE(obj)); 2114467b3f33SStefan Hajnoczi } 2115467b3f33SStefan Hajnoczi 2116977a117fSHalil Pasic static const VMStateDescription vmstate_virtio_blk = { 2117977a117fSHalil Pasic .name = "virtio-blk", 2118977a117fSHalil Pasic .minimum_version_id = 2, 2119977a117fSHalil Pasic .version_id = 2, 21207d5dc0a3SRichard Henderson .fields = (const VMStateField[]) { 2121977a117fSHalil Pasic VMSTATE_VIRTIO_DEVICE, 2122977a117fSHalil Pasic VMSTATE_END_OF_LIST() 2123977a117fSHalil Pasic }, 2124977a117fSHalil Pasic }; 2125bbded32cSDr. David Alan Gilbert 21266e790746SPaolo Bonzini static Property virtio_blk_properties[] = { 21272a30307fSMarkus Armbruster DEFINE_BLOCK_PROPERTIES(VirtIOBlock, conf.conf), 21288c398252SKevin Wolf DEFINE_BLOCK_ERROR_PROPERTIES(VirtIOBlock, conf.conf), 21292a30307fSMarkus Armbruster DEFINE_BLOCK_CHS_PROPERTIES(VirtIOBlock, conf.conf), 21302a30307fSMarkus Armbruster DEFINE_PROP_STRING("serial", VirtIOBlock, conf.serial), 2131bbe8bd4dSStefano Garzarella DEFINE_PROP_BIT64("config-wce", VirtIOBlock, host_features, 2132bbe8bd4dSStefano Garzarella VIRTIO_BLK_F_CONFIG_WCE, true), 213332a877e4SStefan Hajnoczi #ifdef __linux__ 2134bbe8bd4dSStefano Garzarella DEFINE_PROP_BIT64("scsi", VirtIOBlock, host_features, 2135bbe8bd4dSStefano Garzarella VIRTIO_BLK_F_SCSI, false), 213632a877e4SStefan Hajnoczi #endif 2137c99495acSPeter Lieven DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, 0, 2138c99495acSPeter Lieven true), 21399445e1e1SStefan Hajnoczi DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues, 21409445e1e1SStefan Hajnoczi VIRTIO_BLK_AUTO_NUM_QUEUES), 2141c9b7d9ecSDenis Plotnikov DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 256), 21421bf8a989SDenis Plotnikov DEFINE_PROP_BOOL("seg-max-adjust", VirtIOBlock, conf.seg_max_adjust, true), 2143d679ac09SFam Zheng DEFINE_PROP_LINK("iothread", VirtIOBlock, conf.iothread, TYPE_IOTHREAD, 2144d679ac09SFam Zheng IOThread *), 2145b6948ab0SStefan Hajnoczi DEFINE_PROP_IOTHREAD_VQ_MAPPING_LIST("iothread-vq-mapping", VirtIOBlock, 2146b6948ab0SStefan Hajnoczi conf.iothread_vq_mapping_list), 21475c81161fSStefano Garzarella DEFINE_PROP_BIT64("discard", VirtIOBlock, host_features, 21485c81161fSStefano Garzarella VIRTIO_BLK_F_DISCARD, true), 2149fb0b154cSAkihiko Odaki DEFINE_PROP_BOOL("report-discard-granularity", VirtIOBlock, 2150fb0b154cSAkihiko Odaki conf.report_discard_granularity, true), 21515c81161fSStefano Garzarella DEFINE_PROP_BIT64("write-zeroes", VirtIOBlock, host_features, 21525c81161fSStefano Garzarella VIRTIO_BLK_F_WRITE_ZEROES, true), 215337b06f8dSStefano Garzarella DEFINE_PROP_UINT32("max-discard-sectors", VirtIOBlock, 215437b06f8dSStefano Garzarella conf.max_discard_sectors, BDRV_REQUEST_MAX_SECTORS), 215537b06f8dSStefano Garzarella DEFINE_PROP_UINT32("max-write-zeroes-sectors", VirtIOBlock, 215637b06f8dSStefano Garzarella conf.max_write_zeroes_sectors, BDRV_REQUEST_MAX_SECTORS), 21575f258577SEvgeny Yakovlev DEFINE_PROP_BOOL("x-enable-wce-if-config-wce", VirtIOBlock, 21585f258577SEvgeny Yakovlev conf.x_enable_wce_if_config_wce, true), 21596e790746SPaolo Bonzini DEFINE_PROP_END_OF_LIST(), 21606e790746SPaolo Bonzini }; 21616e790746SPaolo Bonzini 21626e790746SPaolo Bonzini static void virtio_blk_class_init(ObjectClass *klass, void *data) 21636e790746SPaolo Bonzini { 21646e790746SPaolo Bonzini DeviceClass *dc = DEVICE_CLASS(klass); 21656e790746SPaolo Bonzini VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 216675884afdSAndreas Färber 21674f67d30bSMarc-André Lureau device_class_set_props(dc, virtio_blk_properties); 2168bbded32cSDr. David Alan Gilbert dc->vmsd = &vmstate_virtio_blk; 2169125ee0edSMarcel Apfelbaum set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 217075884afdSAndreas Färber vdc->realize = virtio_blk_device_realize; 2171306ec6c3SAndreas Färber vdc->unrealize = virtio_blk_device_unrealize; 21726e790746SPaolo Bonzini vdc->get_config = virtio_blk_update_config; 21736e790746SPaolo Bonzini vdc->set_config = virtio_blk_set_config; 21746e790746SPaolo Bonzini vdc->get_features = virtio_blk_get_features; 21756e790746SPaolo Bonzini vdc->set_status = virtio_blk_set_status; 21766e790746SPaolo Bonzini vdc->reset = virtio_blk_reset; 2177b2b295a7SGreg Kurz vdc->save = virtio_blk_save_device; 2178b2b295a7SGreg Kurz vdc->load = virtio_blk_load_device; 21793cdaf3ddSStefan Hajnoczi vdc->start_ioeventfd = virtio_blk_start_ioeventfd; 21803cdaf3ddSStefan Hajnoczi vdc->stop_ioeventfd = virtio_blk_stop_ioeventfd; 21816e790746SPaolo Bonzini } 21826e790746SPaolo Bonzini 2183b5c7ceafSChanglong Xie static const TypeInfo virtio_blk_info = { 21846e790746SPaolo Bonzini .name = TYPE_VIRTIO_BLK, 21856e790746SPaolo Bonzini .parent = TYPE_VIRTIO_DEVICE, 21866e790746SPaolo Bonzini .instance_size = sizeof(VirtIOBlock), 2187467b3f33SStefan Hajnoczi .instance_init = virtio_blk_instance_init, 21886e790746SPaolo Bonzini .class_init = virtio_blk_class_init, 21896e790746SPaolo Bonzini }; 21906e790746SPaolo Bonzini 21916e790746SPaolo Bonzini static void virtio_register_types(void) 21926e790746SPaolo Bonzini { 2193b5c7ceafSChanglong Xie type_register_static(&virtio_blk_info); 21946e790746SPaolo Bonzini } 21956e790746SPaolo Bonzini 21966e790746SPaolo Bonzini type_init(virtio_register_types) 2197