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
virtio_blk_init_request(VirtIOBlock * s,VirtQueue * vq,VirtIOBlockReq * req)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
virtio_blk_free_request(VirtIOBlockReq * req)53d14dde5eSGreg Kurz static void virtio_blk_free_request(VirtIOBlockReq *req)
54671ec3f0SFam Zheng {
55c84b3192SPaolo Bonzini g_free(req);
56671ec3f0SFam Zheng }
57671ec3f0SFam Zheng
virtio_blk_req_complete(VirtIOBlockReq * req,unsigned char status)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);
69bfa36802SStefan 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
virtio_blk_handle_rw_error(VirtIOBlockReq * req,int error,bool is_read,bool acct_failed)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
virtio_blk_rw_complete(void * opaque,int ret)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
virtio_blk_flush_complete(void * opaque,int ret)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
virtio_blk_discard_write_zeroes_complete(void * opaque,int ret)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
virtio_blk_ioctl_complete(void * opaque,int status)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
virtio_blk_get_request(VirtIOBlock * s,VirtQueue * vq)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
virtio_blk_handle_scsi_req(VirtIOBlockReq * req)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
virtio_blk_handle_scsi(VirtIOBlockReq * req)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
submit_requests(VirtIOBlock * s,MultiReqBuffer * mrb,int start,int num_reqs,int niov)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
multireq_compare(const void * a,const void * b)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
virtio_blk_submit_multireq(VirtIOBlock * s,MultiReqBuffer * mrb)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
virtio_blk_handle_flush(VirtIOBlockReq * req,MultiReqBuffer * mrb)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
virtio_blk_sect_range_ok(VirtIOBlock * dev,uint64_t sector,size_t size)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
virtio_blk_handle_discard_write_zeroes(VirtIOBlockReq * req,struct virtio_blk_discard_write_zeroes * dwz_hdr,bool is_write_zeroes)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 */
check_zoned_request(VirtIOBlock * s,int64_t offset,int64_t len,bool append,uint8_t * status)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
virtio_blk_zone_report_complete(void * opaque,int ret)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
virtio_blk_handle_zone_report(VirtIOBlockReq * req,struct iovec * in_iov,unsigned in_num)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");
771*bbdf9023SZheyu Ma err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD;
772*bbdf9023SZheyu Ma goto out;
7734f736650SSam Li }
7744f736650SSam Li
7754f736650SSam Li /* start byte offset of the zone report */
7764f736650SSam Li offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS;
7774f736650SSam Li if (!check_zoned_request(s, offset, 0, false, &err_status)) {
7784f736650SSam Li goto out;
7794f736650SSam Li }
7804f736650SSam Li nr_zones = (req->in_len - sizeof(struct virtio_blk_inhdr) -
7814f736650SSam Li sizeof(struct virtio_blk_zone_report)) /
7824f736650SSam Li sizeof(struct virtio_blk_zone_descriptor);
7834e92acf7SSam Li trace_virtio_blk_handle_zone_report(vdev, req,
7844e92acf7SSam Li offset >> BDRV_SECTOR_BITS, nr_zones);
7854f736650SSam Li
7864f736650SSam Li zone_size = sizeof(BlockZoneDescriptor) * nr_zones;
7874f736650SSam Li data = g_malloc(sizeof(ZoneCmdData));
7884f736650SSam Li data->req = req;
7894f736650SSam Li data->in_iov = in_iov;
7904f736650SSam Li data->in_num = in_num;
7914f736650SSam Li data->zone_report_data.nr_zones = nr_zones;
7924f736650SSam Li data->zone_report_data.zones = g_malloc(zone_size),
7934f736650SSam Li
7944f736650SSam Li blk_aio_zone_report(s->blk, offset, &data->zone_report_data.nr_zones,
7954f736650SSam Li data->zone_report_data.zones,
7964f736650SSam Li virtio_blk_zone_report_complete, data);
7974f736650SSam Li return;
7984f736650SSam Li out:
7994f736650SSam Li virtio_blk_req_complete(req, err_status);
8004f736650SSam Li virtio_blk_free_request(req);
8014f736650SSam Li }
8024f736650SSam Li
virtio_blk_zone_mgmt_complete(void * opaque,int ret)8034f736650SSam Li static void virtio_blk_zone_mgmt_complete(void *opaque, int ret)
8044f736650SSam Li {
8054f736650SSam Li VirtIOBlockReq *req = opaque;
8064f736650SSam Li VirtIOBlock *s = req->dev;
8074e92acf7SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s);
8084f736650SSam Li int8_t err_status = VIRTIO_BLK_S_OK;
8094e92acf7SSam Li trace_virtio_blk_zone_mgmt_complete(vdev, req,ret);
8104f736650SSam Li
8114f736650SSam Li if (ret) {
8124f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD;
8134f736650SSam Li }
8144f736650SSam Li
8154f736650SSam Li virtio_blk_req_complete(req, err_status);
8164f736650SSam Li virtio_blk_free_request(req);
8174f736650SSam Li }
8184f736650SSam Li
virtio_blk_handle_zone_mgmt(VirtIOBlockReq * req,BlockZoneOp op)8194f736650SSam Li static int virtio_blk_handle_zone_mgmt(VirtIOBlockReq *req, BlockZoneOp op)
8204f736650SSam Li {
8214f736650SSam Li VirtIOBlock *s = req->dev;
8224f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s);
8234f736650SSam Li BlockDriverState *bs = blk_bs(s->blk);
8244f736650SSam Li int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS;
8254f736650SSam Li uint64_t len;
8264f736650SSam Li uint64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS;
8274f736650SSam Li uint8_t err_status = VIRTIO_BLK_S_OK;
8284f736650SSam Li
8294f736650SSam Li uint32_t type = virtio_ldl_p(vdev, &req->out.type);
8304f736650SSam Li if (type == VIRTIO_BLK_T_ZONE_RESET_ALL) {
8314f736650SSam Li /* Entire drive capacity */
8324f736650SSam Li offset = 0;
8334f736650SSam Li len = capacity;
8344e92acf7SSam Li trace_virtio_blk_handle_zone_reset_all(vdev, req, 0,
8354e92acf7SSam Li bs->total_sectors);
8364f736650SSam Li } else {
8374f736650SSam Li if (bs->bl.zone_size > capacity - offset) {
8384f736650SSam Li /* The zoned device allows the last smaller zone. */
8394f736650SSam Li len = capacity - bs->bl.zone_size * (bs->bl.nr_zones - 1);
8404f736650SSam Li } else {
8414f736650SSam Li len = bs->bl.zone_size;
8424f736650SSam Li }
8434e92acf7SSam Li trace_virtio_blk_handle_zone_mgmt(vdev, req, op,
8444e92acf7SSam Li offset >> BDRV_SECTOR_BITS,
8454e92acf7SSam Li len >> BDRV_SECTOR_BITS);
8464f736650SSam Li }
8474f736650SSam Li
8484f736650SSam Li if (!check_zoned_request(s, offset, len, false, &err_status)) {
8494f736650SSam Li goto out;
8504f736650SSam Li }
8514f736650SSam Li
8524f736650SSam Li blk_aio_zone_mgmt(s->blk, op, offset, len,
8534f736650SSam Li virtio_blk_zone_mgmt_complete, req);
8544f736650SSam Li
8554f736650SSam Li return 0;
8564f736650SSam Li out:
8574f736650SSam Li virtio_blk_req_complete(req, err_status);
8584f736650SSam Li virtio_blk_free_request(req);
8594f736650SSam Li return err_status;
8604f736650SSam Li }
8614f736650SSam Li
virtio_blk_zone_append_complete(void * opaque,int ret)8624f736650SSam Li static void virtio_blk_zone_append_complete(void *opaque, int ret)
8634f736650SSam Li {
8644f736650SSam Li ZoneCmdData *data = opaque;
8654f736650SSam Li VirtIOBlockReq *req = data->req;
8664f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(req->dev);
8674f736650SSam Li int64_t append_sector, n;
8684f736650SSam Li uint8_t err_status = VIRTIO_BLK_S_OK;
8694f736650SSam Li
8704f736650SSam Li if (ret) {
8714f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD;
8724f736650SSam Li goto out;
8734f736650SSam Li }
8744f736650SSam Li
8754f736650SSam Li virtio_stq_p(vdev, &append_sector,
8764f736650SSam Li data->zone_append_data.offset >> BDRV_SECTOR_BITS);
8774f736650SSam Li n = iov_from_buf(data->in_iov, data->in_num, 0, &append_sector,
8784f736650SSam Li sizeof(append_sector));
8794f736650SSam Li if (n != sizeof(append_sector)) {
8804f736650SSam Li virtio_error(vdev, "Driver provided input buffer less than size of "
8814f736650SSam Li "append_sector");
8824f736650SSam Li err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD;
8834f736650SSam Li goto out;
8844f736650SSam Li }
8854e92acf7SSam Li trace_virtio_blk_zone_append_complete(vdev, req, append_sector, ret);
8864f736650SSam Li
8874f736650SSam Li out:
8884f736650SSam Li virtio_blk_req_complete(req, err_status);
8894f736650SSam Li virtio_blk_free_request(req);
8904f736650SSam Li g_free(data);
8914f736650SSam Li }
8924f736650SSam Li
virtio_blk_handle_zone_append(VirtIOBlockReq * req,struct iovec * out_iov,struct iovec * in_iov,uint64_t out_num,unsigned in_num)8934f736650SSam Li static int virtio_blk_handle_zone_append(VirtIOBlockReq *req,
8944f736650SSam Li struct iovec *out_iov,
8954f736650SSam Li struct iovec *in_iov,
8964f736650SSam Li uint64_t out_num,
8974f736650SSam Li unsigned in_num) {
8984f736650SSam Li VirtIOBlock *s = req->dev;
8994f736650SSam Li VirtIODevice *vdev = VIRTIO_DEVICE(s);
9004f736650SSam Li uint8_t err_status = VIRTIO_BLK_S_OK;
9014f736650SSam Li
9024f736650SSam Li int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << BDRV_SECTOR_BITS;
9034f736650SSam Li int64_t len = iov_size(out_iov, out_num);
904b3d9bb9aSStefan Hajnoczi ZoneCmdData *data;
9054f736650SSam Li
9064e92acf7SSam Li trace_virtio_blk_handle_zone_append(vdev, req, offset >> BDRV_SECTOR_BITS);
9074f736650SSam Li if (!check_zoned_request(s, offset, len, true, &err_status)) {
9084f736650SSam Li goto out;
9094f736650SSam Li }
9104f736650SSam Li
911b3d9bb9aSStefan Hajnoczi data = g_malloc(sizeof(ZoneCmdData));
9124f736650SSam Li data->req = req;
9134f736650SSam Li data->in_iov = in_iov;
9144f736650SSam Li data->in_num = in_num;
9154f736650SSam Li data->zone_append_data.offset = offset;
9164f736650SSam Li qemu_iovec_init_external(&req->qiov, out_iov, out_num);
91752eb76f4SSam Li
91852eb76f4SSam Li block_acct_start(blk_get_stats(s->blk), &req->acct, len,
91952eb76f4SSam Li BLOCK_ACCT_ZONE_APPEND);
92052eb76f4SSam Li
9214f736650SSam Li blk_aio_zone_append(s->blk, &data->zone_append_data.offset, &req->qiov, 0,
9224f736650SSam Li virtio_blk_zone_append_complete, data);
9234f736650SSam Li return 0;
9244f736650SSam Li
9254f736650SSam Li out:
9264f736650SSam Li virtio_blk_req_complete(req, err_status);
9274f736650SSam Li virtio_blk_free_request(req);
9284f736650SSam Li return err_status;
9294f736650SSam Li }
9304f736650SSam Li
virtio_blk_handle_request(VirtIOBlockReq * req,MultiReqBuffer * mrb)93120ea686aSGreg Kurz static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb)
9326e790746SPaolo Bonzini {
9336e790746SPaolo Bonzini uint32_t type;
934f897bf75SStefan Hajnoczi struct iovec *in_iov = req->elem.in_sg;
9355636da76SDongli Zhang struct iovec *out_iov = req->elem.out_sg;
936f897bf75SStefan Hajnoczi unsigned in_num = req->elem.in_num;
937f897bf75SStefan Hajnoczi unsigned out_num = req->elem.out_num;
93820ea686aSGreg Kurz VirtIOBlock *s = req->dev;
93920ea686aSGreg Kurz VirtIODevice *vdev = VIRTIO_DEVICE(s);
9406e790746SPaolo Bonzini
941f897bf75SStefan Hajnoczi if (req->elem.out_num < 1 || req->elem.in_num < 1) {
94220ea686aSGreg Kurz virtio_error(vdev, "virtio-blk missing headers");
94320ea686aSGreg Kurz return -1;
9446e790746SPaolo Bonzini }
9456e790746SPaolo Bonzini
9465636da76SDongli Zhang if (unlikely(iov_to_buf(out_iov, out_num, 0, &req->out,
947827805a2SFam Zheng sizeof(req->out)) != sizeof(req->out))) {
94820ea686aSGreg Kurz virtio_error(vdev, "virtio-blk request outhdr too short");
94920ea686aSGreg Kurz return -1;
950827805a2SFam Zheng }
951ee17e848SFam Zheng
9527bd04a04SStefan Hajnoczi iov_discard_front_undoable(&out_iov, &out_num, sizeof(req->out),
9537bd04a04SStefan Hajnoczi &req->outhdr_undo);
954ee17e848SFam Zheng
95512048545SGonglei if (in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) {
95620ea686aSGreg Kurz virtio_error(vdev, "virtio-blk request inhdr too short");
9577bd04a04SStefan Hajnoczi iov_discard_undo(&req->outhdr_undo);
95820ea686aSGreg Kurz return -1;
959ee17e848SFam Zheng }
960ee17e848SFam Zheng
9612a6cdd6dSPaolo Bonzini /* We always touch the last byte, so just see how big in_iov is. */
9622a6cdd6dSPaolo Bonzini req->in_len = iov_size(in_iov, in_num);
963ee17e848SFam Zheng req->in = (void *)in_iov[in_num - 1].iov_base
964ee17e848SFam Zheng + in_iov[in_num - 1].iov_len
965ee17e848SFam Zheng - sizeof(struct virtio_blk_inhdr);
9667bd04a04SStefan Hajnoczi iov_discard_back_undoable(in_iov, &in_num, sizeof(struct virtio_blk_inhdr),
9677bd04a04SStefan Hajnoczi &req->inhdr_undo);
9686e790746SPaolo Bonzini
9699a6719d5SStefano Garzarella type = virtio_ldl_p(vdev, &req->out.type);
9706e790746SPaolo Bonzini
97195f7142aSPeter Lieven /* VIRTIO_BLK_T_OUT defines the command direction. VIRTIO_BLK_T_BARRIER
972631b22eaSStefan Weil * is an optional flag. Although a guest should not send this flag if
97395f7142aSPeter Lieven * not negotiated we ignored it in the past. So keep ignoring it. */
97495f7142aSPeter Lieven switch (type & ~(VIRTIO_BLK_T_OUT | VIRTIO_BLK_T_BARRIER)) {
97595f7142aSPeter Lieven case VIRTIO_BLK_T_IN:
97695f7142aSPeter Lieven {
97795f7142aSPeter Lieven bool is_write = type & VIRTIO_BLK_T_OUT;
9789a6719d5SStefano Garzarella req->sector_num = virtio_ldq_p(vdev, &req->out.sector);
97995f7142aSPeter Lieven
98095f7142aSPeter Lieven if (is_write) {
9815636da76SDongli Zhang qemu_iovec_init_external(&req->qiov, out_iov, out_num);
982a576ceacSStefan Hajnoczi trace_virtio_blk_handle_write(vdev, req, req->sector_num,
98395f7142aSPeter Lieven req->qiov.size / BDRV_SECTOR_SIZE);
98495f7142aSPeter Lieven } else {
98595f7142aSPeter Lieven qemu_iovec_init_external(&req->qiov, in_iov, in_num);
986a576ceacSStefan Hajnoczi trace_virtio_blk_handle_read(vdev, req, req->sector_num,
98795f7142aSPeter Lieven req->qiov.size / BDRV_SECTOR_SIZE);
98895f7142aSPeter Lieven }
98995f7142aSPeter Lieven
9909a6719d5SStefano Garzarella if (!virtio_blk_sect_range_ok(s, req->sector_num, req->qiov.size)) {
99195f7142aSPeter Lieven virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
9929a6719d5SStefano Garzarella block_acct_invalid(blk_get_stats(s->blk),
99301762e03SAlberto Garcia is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ);
99495f7142aSPeter Lieven virtio_blk_free_request(req);
99520ea686aSGreg Kurz return 0;
99695f7142aSPeter Lieven }
99795f7142aSPeter Lieven
9989a6719d5SStefano Garzarella block_acct_start(blk_get_stats(s->blk), &req->acct, req->qiov.size,
99995f7142aSPeter Lieven is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ);
100095f7142aSPeter Lieven
100195f7142aSPeter Lieven /* merge would exceed maximum number of requests or IO direction
100295f7142aSPeter Lieven * changes */
100395f7142aSPeter Lieven if (mrb->num_reqs > 0 && (mrb->num_reqs == VIRTIO_BLK_MAX_MERGE_REQS ||
1004c99495acSPeter Lieven is_write != mrb->is_write ||
10059a6719d5SStefano Garzarella !s->conf.request_merging)) {
1006baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, mrb);
100795f7142aSPeter Lieven }
100895f7142aSPeter Lieven
100995f7142aSPeter Lieven assert(mrb->num_reqs < VIRTIO_BLK_MAX_MERGE_REQS);
101095f7142aSPeter Lieven mrb->reqs[mrb->num_reqs++] = req;
101195f7142aSPeter Lieven mrb->is_write = is_write;
101295f7142aSPeter Lieven break;
101395f7142aSPeter Lieven }
101495f7142aSPeter Lieven case VIRTIO_BLK_T_FLUSH:
10156e790746SPaolo Bonzini virtio_blk_handle_flush(req, mrb);
101695f7142aSPeter Lieven break;
10174f736650SSam Li case VIRTIO_BLK_T_ZONE_REPORT:
10184f736650SSam Li virtio_blk_handle_zone_report(req, in_iov, in_num);
10194f736650SSam Li break;
10204f736650SSam Li case VIRTIO_BLK_T_ZONE_OPEN:
10214f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_OPEN);
10224f736650SSam Li break;
10234f736650SSam Li case VIRTIO_BLK_T_ZONE_CLOSE:
10244f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_CLOSE);
10254f736650SSam Li break;
10264f736650SSam Li case VIRTIO_BLK_T_ZONE_FINISH:
10274f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_FINISH);
10284f736650SSam Li break;
10294f736650SSam Li case VIRTIO_BLK_T_ZONE_RESET:
10304f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET);
10314f736650SSam Li break;
10324f736650SSam Li case VIRTIO_BLK_T_ZONE_RESET_ALL:
10334f736650SSam Li virtio_blk_handle_zone_mgmt(req, BLK_ZO_RESET);
10344f736650SSam Li break;
103595f7142aSPeter Lieven case VIRTIO_BLK_T_SCSI_CMD:
10366e790746SPaolo Bonzini virtio_blk_handle_scsi(req);
103795f7142aSPeter Lieven break;
103895f7142aSPeter Lieven case VIRTIO_BLK_T_GET_ID:
103995f7142aSPeter Lieven {
10406e790746SPaolo Bonzini /*
10416e790746SPaolo Bonzini * NB: per existing s/n string convention the string is
10426e790746SPaolo Bonzini * terminated by '\0' only when shorter than buffer.
10436e790746SPaolo Bonzini */
10442a30307fSMarkus Armbruster const char *serial = s->conf.serial ? s->conf.serial : "";
1045a83ceea8SMarc Marí size_t size = MIN(strlen(serial) + 1,
1046a83ceea8SMarc Marí MIN(iov_size(in_iov, in_num),
1047a83ceea8SMarc Marí VIRTIO_BLK_ID_BYTES));
1048a83ceea8SMarc Marí iov_from_buf(in_iov, in_num, 0, serial, size);
10496e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_OK);
1050671ec3f0SFam Zheng virtio_blk_free_request(req);
105195f7142aSPeter Lieven break;
105295f7142aSPeter Lieven }
10534f736650SSam Li case VIRTIO_BLK_T_ZONE_APPEND & ~VIRTIO_BLK_T_OUT:
10544f736650SSam Li /*
10554f736650SSam Li * Passing out_iov/out_num and in_iov/in_num is not safe
10564f736650SSam Li * to access req->elem.out_sg directly because it may be
10574f736650SSam Li * modified by virtio_blk_handle_request().
10584f736650SSam Li */
10594f736650SSam Li virtio_blk_handle_zone_append(req, out_iov, in_iov, out_num, in_num);
10604f736650SSam Li break;
106137b06f8dSStefano Garzarella /*
106237b06f8dSStefano Garzarella * VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES are defined with
106337b06f8dSStefano Garzarella * VIRTIO_BLK_T_OUT flag set. We masked this flag in the switch statement,
106437b06f8dSStefano Garzarella * so we must mask it for these requests, then we will check if it is set.
106537b06f8dSStefano Garzarella */
106637b06f8dSStefano Garzarella case VIRTIO_BLK_T_DISCARD & ~VIRTIO_BLK_T_OUT:
106737b06f8dSStefano Garzarella case VIRTIO_BLK_T_WRITE_ZEROES & ~VIRTIO_BLK_T_OUT:
106837b06f8dSStefano Garzarella {
106937b06f8dSStefano Garzarella struct virtio_blk_discard_write_zeroes dwz_hdr;
107037b06f8dSStefano Garzarella size_t out_len = iov_size(out_iov, out_num);
107137b06f8dSStefano Garzarella bool is_write_zeroes = (type & ~VIRTIO_BLK_T_BARRIER) ==
107237b06f8dSStefano Garzarella VIRTIO_BLK_T_WRITE_ZEROES;
107337b06f8dSStefano Garzarella uint8_t err_status;
107437b06f8dSStefano Garzarella
107537b06f8dSStefano Garzarella /*
107637b06f8dSStefano Garzarella * Unsupported if VIRTIO_BLK_T_OUT is not set or the request contains
107737b06f8dSStefano Garzarella * more than one segment.
107837b06f8dSStefano Garzarella */
107937b06f8dSStefano Garzarella if (unlikely(!(type & VIRTIO_BLK_T_OUT) ||
108037b06f8dSStefano Garzarella out_len > sizeof(dwz_hdr))) {
108137b06f8dSStefano Garzarella virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP);
108237b06f8dSStefano Garzarella virtio_blk_free_request(req);
108337b06f8dSStefano Garzarella return 0;
108437b06f8dSStefano Garzarella }
108537b06f8dSStefano Garzarella
108637b06f8dSStefano Garzarella if (unlikely(iov_to_buf(out_iov, out_num, 0, &dwz_hdr,
108737b06f8dSStefano Garzarella sizeof(dwz_hdr)) != sizeof(dwz_hdr))) {
10887bd04a04SStefan Hajnoczi iov_discard_undo(&req->inhdr_undo);
10897bd04a04SStefan Hajnoczi iov_discard_undo(&req->outhdr_undo);
109037b06f8dSStefano Garzarella virtio_error(vdev, "virtio-blk discard/write_zeroes header"
109137b06f8dSStefano Garzarella " too short");
109237b06f8dSStefano Garzarella return -1;
109337b06f8dSStefano Garzarella }
109437b06f8dSStefano Garzarella
109537b06f8dSStefano Garzarella err_status = virtio_blk_handle_discard_write_zeroes(req, &dwz_hdr,
109637b06f8dSStefano Garzarella is_write_zeroes);
109737b06f8dSStefano Garzarella if (err_status != VIRTIO_BLK_S_OK) {
109837b06f8dSStefano Garzarella virtio_blk_req_complete(req, err_status);
109937b06f8dSStefano Garzarella virtio_blk_free_request(req);
110037b06f8dSStefano Garzarella }
110137b06f8dSStefano Garzarella
110237b06f8dSStefano Garzarella break;
110337b06f8dSStefano Garzarella }
110495f7142aSPeter Lieven default:
11056e790746SPaolo Bonzini virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP);
1106671ec3f0SFam Zheng virtio_blk_free_request(req);
11076e790746SPaolo Bonzini }
110820ea686aSGreg Kurz return 0;
11096e790746SPaolo Bonzini }
11106e790746SPaolo Bonzini
virtio_blk_handle_vq(VirtIOBlock * s,VirtQueue * vq)1111186b9691SStefan Hajnoczi void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq)
11126e790746SPaolo Bonzini {
11136e790746SPaolo Bonzini VirtIOBlockReq *req;
111495f7142aSPeter Lieven MultiReqBuffer mrb = {};
1115d0435bc5SStefan Hajnoczi bool suppress_notifications = virtio_queue_get_notification(vq);
11166e790746SPaolo Bonzini
1117ccee48aaSStefan Hajnoczi defer_call_begin();
1118fc73548eSStefan Hajnoczi
11199ef9d402SStefan Hajnoczi do {
1120d0435bc5SStefan Hajnoczi if (suppress_notifications) {
11219ef9d402SStefan Hajnoczi virtio_queue_set_notification(vq, 0);
1122d0435bc5SStefan Hajnoczi }
11239ef9d402SStefan Hajnoczi
1124edaffd9fSStefan Hajnoczi while ((req = virtio_blk_get_request(s, vq))) {
112520ea686aSGreg Kurz if (virtio_blk_handle_request(req, &mrb)) {
112620ea686aSGreg Kurz virtqueue_detach_element(req->vq, &req->elem, 0);
112720ea686aSGreg Kurz virtio_blk_free_request(req);
112820ea686aSGreg Kurz break;
112920ea686aSGreg Kurz }
11306e790746SPaolo Bonzini }
11316e790746SPaolo Bonzini
1132d0435bc5SStefan Hajnoczi if (suppress_notifications) {
11339ef9d402SStefan Hajnoczi virtio_queue_set_notification(vq, 1);
1134d0435bc5SStefan Hajnoczi }
11359ef9d402SStefan Hajnoczi } while (!virtio_queue_empty(vq));
11369ef9d402SStefan Hajnoczi
113795f7142aSPeter Lieven if (mrb.num_reqs) {
1138baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, &mrb);
113995f7142aSPeter Lieven }
1140fc73548eSStefan Hajnoczi
1141ccee48aaSStefan Hajnoczi defer_call_end();
11426e790746SPaolo Bonzini }
11436e790746SPaolo Bonzini
virtio_blk_handle_output(VirtIODevice * vdev,VirtQueue * vq)11448a2fad57SMichael S. Tsirkin static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
11458a2fad57SMichael S. Tsirkin {
11468a2fad57SMichael S. Tsirkin VirtIOBlock *s = (VirtIOBlock *)vdev;
11478a2fad57SMichael S. Tsirkin
11483cdaf3ddSStefan Hajnoczi if (!s->ioeventfd_disabled && !s->ioeventfd_started) {
11498a2fad57SMichael S. Tsirkin /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start
11503cdaf3ddSStefan Hajnoczi * ioeventfd here instead of waiting for .set_status().
11518a2fad57SMichael S. Tsirkin */
11529ffe337cSPaolo Bonzini virtio_device_start_ioeventfd(vdev);
11533cdaf3ddSStefan Hajnoczi if (!s->ioeventfd_disabled) {
11548a2fad57SMichael S. Tsirkin return;
11558a2fad57SMichael S. Tsirkin }
11568a2fad57SMichael S. Tsirkin }
1157b6948ab0SStefan Hajnoczi
1158186b9691SStefan Hajnoczi virtio_blk_handle_vq(s, vq);
11598a2fad57SMichael S. Tsirkin }
11608a2fad57SMichael S. Tsirkin
virtio_blk_dma_restart_bh(void * opaque)1161a937f8e8SStefan Hajnoczi static void virtio_blk_dma_restart_bh(void *opaque)
11626e790746SPaolo Bonzini {
116371ee0cddSStefan Hajnoczi VirtIOBlockReq *req = opaque;
116471ee0cddSStefan Hajnoczi VirtIOBlock *s = req->dev; /* we're called with at least one request */
1165a937f8e8SStefan Hajnoczi
116695f7142aSPeter Lieven MultiReqBuffer mrb = {};
11676e790746SPaolo Bonzini
11686e790746SPaolo Bonzini while (req) {
11691bdb176aSzhanghailiang VirtIOBlockReq *next = req->next;
117020ea686aSGreg Kurz if (virtio_blk_handle_request(req, &mrb)) {
117120ea686aSGreg Kurz /* Device is now broken and won't do any processing until it gets
117220ea686aSGreg Kurz * reset. Already queued requests will be lost: let's purge them.
117320ea686aSGreg Kurz */
117420ea686aSGreg Kurz while (req) {
117520ea686aSGreg Kurz next = req->next;
117620ea686aSGreg Kurz virtqueue_detach_element(req->vq, &req->elem, 0);
117720ea686aSGreg Kurz virtio_blk_free_request(req);
117820ea686aSGreg Kurz req = next;
117920ea686aSGreg Kurz }
118020ea686aSGreg Kurz break;
118120ea686aSGreg Kurz }
11821bdb176aSzhanghailiang req = next;
11836e790746SPaolo Bonzini }
11846e790746SPaolo Bonzini
118595f7142aSPeter Lieven if (mrb.num_reqs) {
1186baf42268SStefan Hajnoczi virtio_blk_submit_multireq(s, &mrb);
118795f7142aSPeter Lieven }
1188a937f8e8SStefan Hajnoczi
1189a937f8e8SStefan Hajnoczi /* Paired with inc in virtio_blk_dma_restart_cb() */
1190680f2002SKevin Wolf blk_dec_in_flight(s->conf.conf.blk);
11916e790746SPaolo Bonzini }
11926e790746SPaolo Bonzini
virtio_blk_dma_restart_cb(void * opaque,bool running,RunState state)1193538f0497SPhilippe Mathieu-Daudé static void virtio_blk_dma_restart_cb(void *opaque, bool running,
11946e790746SPaolo Bonzini RunState state)
11956e790746SPaolo Bonzini {
11966e790746SPaolo Bonzini VirtIOBlock *s = opaque;
119771ee0cddSStefan Hajnoczi uint16_t num_queues = s->conf.num_queues;
1198b3d9bb9aSStefan Hajnoczi g_autofree VirtIOBlockReq **vq_rq = NULL;
1199b3d9bb9aSStefan Hajnoczi VirtIOBlockReq *rq;
12006e790746SPaolo Bonzini
12016e790746SPaolo Bonzini if (!running) {
12026e790746SPaolo Bonzini return;
12036e790746SPaolo Bonzini }
12046e790746SPaolo Bonzini
120571ee0cddSStefan Hajnoczi /* Split the device-wide s->rq request list into per-vq request lists */
1206b3d9bb9aSStefan Hajnoczi vq_rq = g_new0(VirtIOBlockReq *, num_queues);
120771ee0cddSStefan Hajnoczi
120871ee0cddSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) {
120971ee0cddSStefan Hajnoczi rq = s->rq;
121071ee0cddSStefan Hajnoczi s->rq = NULL;
121171ee0cddSStefan Hajnoczi }
121271ee0cddSStefan Hajnoczi
121371ee0cddSStefan Hajnoczi while (rq) {
121471ee0cddSStefan Hajnoczi VirtIOBlockReq *next = rq->next;
121571ee0cddSStefan Hajnoczi uint16_t idx = virtio_get_queue_index(rq->vq);
121671ee0cddSStefan Hajnoczi
1217f2eea93cSStefan Hajnoczi /* Only num_queues vqs were created so vq_rq[idx] is within bounds */
1218f2eea93cSStefan Hajnoczi assert(idx < num_queues);
121971ee0cddSStefan Hajnoczi rq->next = vq_rq[idx];
122071ee0cddSStefan Hajnoczi vq_rq[idx] = rq;
122171ee0cddSStefan Hajnoczi rq = next;
122271ee0cddSStefan Hajnoczi }
122371ee0cddSStefan Hajnoczi
122471ee0cddSStefan Hajnoczi /* Schedule a BH to submit the requests in each vq's AioContext */
122571ee0cddSStefan Hajnoczi for (uint16_t i = 0; i < num_queues; i++) {
122671ee0cddSStefan Hajnoczi if (!vq_rq[i]) {
122771ee0cddSStefan Hajnoczi continue;
122871ee0cddSStefan Hajnoczi }
122971ee0cddSStefan Hajnoczi
1230a937f8e8SStefan Hajnoczi /* Paired with dec in virtio_blk_dma_restart_bh() */
1231680f2002SKevin Wolf blk_inc_in_flight(s->conf.conf.blk);
1232a937f8e8SStefan Hajnoczi
123371ee0cddSStefan Hajnoczi aio_bh_schedule_oneshot(s->vq_aio_context[i],
123471ee0cddSStefan Hajnoczi virtio_blk_dma_restart_bh,
123571ee0cddSStefan Hajnoczi vq_rq[i]);
123671ee0cddSStefan Hajnoczi }
12376e790746SPaolo Bonzini }
12386e790746SPaolo Bonzini
virtio_blk_reset(VirtIODevice * vdev)12396e790746SPaolo Bonzini static void virtio_blk_reset(VirtIODevice *vdev)
12406e790746SPaolo Bonzini {
12416e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev);
124226307f6aSFam Zheng VirtIOBlockReq *req;
12436e790746SPaolo Bonzini
12449c67f33fSStefan Hajnoczi /* Dataplane has stopped... */
12453cdaf3ddSStefan Hajnoczi assert(!s->ioeventfd_started);
12469c67f33fSStefan Hajnoczi
12479c67f33fSStefan Hajnoczi /* ...but requests may still be in flight. */
12486e40b3bfSAlexander Yarygin blk_drain(s->blk);
12496e40b3bfSAlexander Yarygin
125026307f6aSFam Zheng /* We drop queued requests after blk_drain() because blk_drain() itself can
125126307f6aSFam Zheng * produce them. */
12529c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) {
125326307f6aSFam Zheng while (s->rq) {
125426307f6aSFam Zheng req = s->rq;
125526307f6aSFam Zheng s->rq = req->next;
12569c67f33fSStefan Hajnoczi
12579c67f33fSStefan Hajnoczi /* No other threads can access req->vq here */
125897b93c8aSStefan Hajnoczi virtqueue_detach_element(req->vq, &req->elem, 0);
12599c67f33fSStefan Hajnoczi
126026307f6aSFam Zheng virtio_blk_free_request(req);
126126307f6aSFam Zheng }
12629c67f33fSStefan Hajnoczi }
126326307f6aSFam Zheng
12644be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, s->original_wce);
12656e790746SPaolo Bonzini }
12666e790746SPaolo Bonzini
12676e790746SPaolo Bonzini /* coalesce internal state, copy to pci i/o region 0
12686e790746SPaolo Bonzini */
virtio_blk_update_config(VirtIODevice * vdev,uint8_t * config)12696e790746SPaolo Bonzini static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config)
12706e790746SPaolo Bonzini {
12716e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev);
12722a30307fSMarkus Armbruster BlockConf *conf = &s->conf.conf;
12734f736650SSam Li BlockDriverState *bs = blk_bs(s->blk);
12746e790746SPaolo Bonzini struct virtio_blk_config blkcfg;
12756e790746SPaolo Bonzini uint64_t capacity;
127617d0bc01SStefan Hajnoczi int64_t length;
1277f7516731SMarkus Armbruster int blk_size = conf->logical_block_size;
12786e790746SPaolo Bonzini
12794be74634SMarkus Armbruster blk_get_geometry(s->blk, &capacity);
12806e790746SPaolo Bonzini memset(&blkcfg, 0, sizeof(blkcfg));
1281783d1897SRusty Russell virtio_stq_p(vdev, &blkcfg.capacity, capacity);
12821bf8a989SDenis Plotnikov virtio_stl_p(vdev, &blkcfg.seg_max,
12831bf8a989SDenis Plotnikov s->conf.seg_max_adjust ? s->conf.queue_size - 2 : 128 - 2);
1284907eb3e5SMichael S. Tsirkin virtio_stw_p(vdev, &blkcfg.geometry.cylinders, conf->cyls);
1285783d1897SRusty Russell virtio_stl_p(vdev, &blkcfg.blk_size, blk_size);
1286f7516731SMarkus Armbruster virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size);
12876abee260SRoman Kagan virtio_stl_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size);
1288907eb3e5SMichael S. Tsirkin blkcfg.geometry.heads = conf->heads;
12896e790746SPaolo Bonzini /*
12906e790746SPaolo Bonzini * We must ensure that the block device capacity is a multiple of
1291e03ba136SPeter Maydell * the logical block size. If that is not the case, let's use
12926e790746SPaolo Bonzini * sector_mask to adopt the geometry to have a correct picture.
12936e790746SPaolo Bonzini * For those devices where the capacity is ok for the given geometry
1294e03ba136SPeter Maydell * we don't touch the sector value of the geometry, since some devices
12956e790746SPaolo Bonzini * (like s390 dasd) need a specific value. Here the capacity is already
12966e790746SPaolo Bonzini * cyls*heads*secs*blk_size and the sector value is not block size
12976e790746SPaolo Bonzini * divided by 512 - instead it is the amount of blk_size blocks
12986e790746SPaolo Bonzini * per track (cylinder).
12996e790746SPaolo Bonzini */
130017d0bc01SStefan Hajnoczi length = blk_getlength(s->blk);
130117d0bc01SStefan Hajnoczi if (length > 0 && length / conf->heads / conf->secs % blk_size) {
1302907eb3e5SMichael S. Tsirkin blkcfg.geometry.sectors = conf->secs & ~s->sector_mask;
13036e790746SPaolo Bonzini } else {
1304907eb3e5SMichael S. Tsirkin blkcfg.geometry.sectors = conf->secs;
13056e790746SPaolo Bonzini }
13066e790746SPaolo Bonzini blkcfg.size_max = 0;
1307f7516731SMarkus Armbruster blkcfg.physical_block_exp = get_physical_block_exp(conf);
13086e790746SPaolo Bonzini blkcfg.alignment_offset = 0;
13094be74634SMarkus Armbruster blkcfg.wce = blk_enable_write_cache(s->blk);
13102f270590SStefan Hajnoczi virtio_stw_p(vdev, &blkcfg.num_queues, s->conf.num_queues);
131137b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD)) {
1312fb0b154cSAkihiko Odaki uint32_t discard_granularity = conf->discard_granularity;
1313fb0b154cSAkihiko Odaki if (discard_granularity == -1 || !s->conf.report_discard_granularity) {
1314fb0b154cSAkihiko Odaki discard_granularity = blk_size;
1315fb0b154cSAkihiko Odaki }
131637b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_discard_sectors,
131737b06f8dSStefano Garzarella s->conf.max_discard_sectors);
131837b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.discard_sector_alignment,
1319fb0b154cSAkihiko Odaki discard_granularity >> BDRV_SECTOR_BITS);
132037b06f8dSStefano Garzarella /*
132137b06f8dSStefano Garzarella * We support only one segment per request since multiple segments
132237b06f8dSStefano Garzarella * are not widely used and there are no userspace APIs that allow
132337b06f8dSStefano Garzarella * applications to submit multiple segments in a single call.
132437b06f8dSStefano Garzarella */
132537b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_discard_seg, 1);
132637b06f8dSStefano Garzarella }
132737b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES)) {
132837b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_write_zeroes_sectors,
132937b06f8dSStefano Garzarella s->conf.max_write_zeroes_sectors);
133037b06f8dSStefano Garzarella blkcfg.write_zeroes_may_unmap = 1;
133137b06f8dSStefano Garzarella virtio_stl_p(vdev, &blkcfg.max_write_zeroes_seg, 1);
133237b06f8dSStefano Garzarella }
13334f736650SSam Li if (bs->bl.zoned != BLK_Z_NONE) {
13344f736650SSam Li switch (bs->bl.zoned) {
13354f736650SSam Li case BLK_Z_HM:
13364f736650SSam Li blkcfg.zoned.model = VIRTIO_BLK_Z_HM;
13374f736650SSam Li break;
13384f736650SSam Li case BLK_Z_HA:
13394f736650SSam Li blkcfg.zoned.model = VIRTIO_BLK_Z_HA;
13404f736650SSam Li break;
13414f736650SSam Li default:
13424f736650SSam Li g_assert_not_reached();
13434f736650SSam Li }
13444f736650SSam Li
13454f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.zone_sectors,
13464f736650SSam Li bs->bl.zone_size / 512);
13474f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.max_active_zones,
13484f736650SSam Li bs->bl.max_active_zones);
13494f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.max_open_zones,
13504f736650SSam Li bs->bl.max_open_zones);
13514f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.write_granularity, blk_size);
13524f736650SSam Li virtio_stl_p(vdev, &blkcfg.zoned.max_append_sectors,
13534f736650SSam Li bs->bl.max_append_sectors);
13544f736650SSam Li } else {
13554f736650SSam Li blkcfg.zoned.model = VIRTIO_BLK_Z_NONE;
13564f736650SSam Li }
135720764be0SStefano Garzarella memcpy(config, &blkcfg, s->config_size);
13586e790746SPaolo Bonzini }
13596e790746SPaolo Bonzini
virtio_blk_set_config(VirtIODevice * vdev,const uint8_t * config)13606e790746SPaolo Bonzini static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config)
13616e790746SPaolo Bonzini {
13626e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev);
13636e790746SPaolo Bonzini struct virtio_blk_config blkcfg;
13646e790746SPaolo Bonzini
136520764be0SStefano Garzarella memcpy(&blkcfg, config, s->config_size);
13666d7e73d6SFam Zheng
13674be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk, blkcfg.wce != 0);
13686e790746SPaolo Bonzini }
13696e790746SPaolo Bonzini
virtio_blk_get_features(VirtIODevice * vdev,uint64_t features,Error ** errp)13709d5b731dSJason Wang static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features,
13719d5b731dSJason Wang Error **errp)
13726e790746SPaolo Bonzini {
13736e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev);
13746e790746SPaolo Bonzini
1375bbe8bd4dSStefano Garzarella /* Firstly sync all virtio-blk possible supported features */
1376bbe8bd4dSStefano Garzarella features |= s->host_features;
1377bbe8bd4dSStefano Garzarella
13780cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX);
13790cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY);
13800cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY);
13810cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE);
138295129d6fSCornelia Huck if (virtio_has_feature(features, VIRTIO_F_VERSION_1)) {
1383bbe8bd4dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_SCSI)) {
1384efb8206cSJason Wang error_setg(errp, "Please set scsi=off for virtio-blk devices in order to use virtio 1.0");
1385efb8206cSJason Wang return 0;
1386efb8206cSJason Wang }
1387efb8206cSJason Wang } else {
1388c9b11f97SJason Wang virtio_clear_feature(&features, VIRTIO_F_ANY_LAYOUT);
1389efb8206cSJason Wang virtio_add_feature(&features, VIRTIO_BLK_F_SCSI);
1390efb8206cSJason Wang }
13916e790746SPaolo Bonzini
13925f258577SEvgeny Yakovlev if (blk_enable_write_cache(s->blk) ||
13935f258577SEvgeny Yakovlev (s->conf.x_enable_wce_if_config_wce &&
13945f258577SEvgeny Yakovlev virtio_has_feature(features, VIRTIO_BLK_F_CONFIG_WCE))) {
13950cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_WCE);
13964be74634SMarkus Armbruster }
139786b1cf32SKevin Wolf if (!blk_is_writable(s->blk)) {
13980cd09c3aSCornelia Huck virtio_add_feature(&features, VIRTIO_BLK_F_RO);
13994be74634SMarkus Armbruster }
14002f270590SStefan Hajnoczi if (s->conf.num_queues > 1) {
14012f270590SStefan Hajnoczi virtio_add_feature(&features, VIRTIO_BLK_F_MQ);
14022f270590SStefan Hajnoczi }
14036e790746SPaolo Bonzini
14046e790746SPaolo Bonzini return features;
14056e790746SPaolo Bonzini }
14066e790746SPaolo Bonzini
virtio_blk_set_status(VirtIODevice * vdev,uint8_t status)14076e790746SPaolo Bonzini static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status)
14086e790746SPaolo Bonzini {
14096e790746SPaolo Bonzini VirtIOBlock *s = VIRTIO_BLK(vdev);
14106e790746SPaolo Bonzini
14119ffe337cSPaolo Bonzini if (!(status & (VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK))) {
14123cdaf3ddSStefan Hajnoczi assert(!s->ioeventfd_started);
14136e790746SPaolo Bonzini }
14146e790746SPaolo Bonzini
14156e790746SPaolo Bonzini if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
14166e790746SPaolo Bonzini return;
14176e790746SPaolo Bonzini }
14186e790746SPaolo Bonzini
1419ef5bc962SPaolo Bonzini /* A guest that supports VIRTIO_BLK_F_CONFIG_WCE must be able to send
1420ef5bc962SPaolo Bonzini * cache flushes. Thus, the "auto writethrough" behavior is never
1421ef5bc962SPaolo Bonzini * necessary for guests that support the VIRTIO_BLK_F_CONFIG_WCE feature.
1422ef5bc962SPaolo Bonzini * Leaving it enabled would break the following sequence:
1423ef5bc962SPaolo Bonzini *
1424ef5bc962SPaolo Bonzini * Guest started with "-drive cache=writethrough"
1425ef5bc962SPaolo Bonzini * Guest sets status to 0
1426ef5bc962SPaolo Bonzini * Guest sets DRIVER bit in status field
1427ef5bc962SPaolo Bonzini * Guest reads host features (WCE=0, CONFIG_WCE=1)
1428ef5bc962SPaolo Bonzini * Guest writes guest features (WCE=0, CONFIG_WCE=1)
1429ef5bc962SPaolo Bonzini * Guest writes 1 to the WCE configuration field (writeback mode)
1430ef5bc962SPaolo Bonzini * Guest sets DRIVER_OK bit in status field
1431ef5bc962SPaolo Bonzini *
14324be74634SMarkus Armbruster * s->blk would erroneously be placed in writethrough mode.
1433ef5bc962SPaolo Bonzini */
143495129d6fSCornelia Huck if (!virtio_vdev_has_feature(vdev, VIRTIO_BLK_F_CONFIG_WCE)) {
14354be74634SMarkus Armbruster blk_set_enable_write_cache(s->blk,
143695129d6fSCornelia Huck virtio_vdev_has_feature(vdev,
143795129d6fSCornelia Huck VIRTIO_BLK_F_WCE));
14386e790746SPaolo Bonzini }
1439ef5bc962SPaolo Bonzini }
14406e790746SPaolo Bonzini
virtio_blk_save_device(VirtIODevice * vdev,QEMUFile * f)1441b2b295a7SGreg Kurz static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f)
1442b2b295a7SGreg Kurz {
1443b2b295a7SGreg Kurz VirtIOBlock *s = VIRTIO_BLK(vdev);
14449c67f33fSStefan Hajnoczi
14459c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) {
1446b2b295a7SGreg Kurz VirtIOBlockReq *req = s->rq;
14476e790746SPaolo Bonzini
14486e790746SPaolo Bonzini while (req) {
14496e790746SPaolo Bonzini qemu_put_sbyte(f, 1);
145030d8bf6dSStefan Hajnoczi
145130d8bf6dSStefan Hajnoczi if (s->conf.num_queues > 1) {
145230d8bf6dSStefan Hajnoczi qemu_put_be32(f, virtio_get_queue_index(req->vq));
145330d8bf6dSStefan Hajnoczi }
145430d8bf6dSStefan Hajnoczi
145586044b24SJason Wang qemu_put_virtqueue_element(vdev, f, &req->elem);
14566e790746SPaolo Bonzini req = req->next;
14576e790746SPaolo Bonzini }
14589c67f33fSStefan Hajnoczi }
14599c67f33fSStefan Hajnoczi
14606e790746SPaolo Bonzini qemu_put_sbyte(f, 0);
14616e790746SPaolo Bonzini }
14626e790746SPaolo Bonzini
virtio_blk_load_device(VirtIODevice * vdev,QEMUFile * f,int version_id)1463b2b295a7SGreg Kurz static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f,
1464b2b295a7SGreg Kurz int version_id)
1465b2b295a7SGreg Kurz {
1466b2b295a7SGreg Kurz VirtIOBlock *s = VIRTIO_BLK(vdev);
1467b2b295a7SGreg Kurz
14686e790746SPaolo Bonzini while (qemu_get_sbyte(f)) {
146930d8bf6dSStefan Hajnoczi unsigned nvqs = s->conf.num_queues;
147030d8bf6dSStefan Hajnoczi unsigned vq_idx = 0;
1471ab281c17SPaolo Bonzini VirtIOBlockReq *req;
147230d8bf6dSStefan Hajnoczi
147330d8bf6dSStefan Hajnoczi if (nvqs > 1) {
147430d8bf6dSStefan Hajnoczi vq_idx = qemu_get_be32(f);
147530d8bf6dSStefan Hajnoczi
147630d8bf6dSStefan Hajnoczi if (vq_idx >= nvqs) {
147730d8bf6dSStefan Hajnoczi error_report("Invalid virtqueue index in request list: %#x",
147830d8bf6dSStefan Hajnoczi vq_idx);
147930d8bf6dSStefan Hajnoczi return -EINVAL;
148030d8bf6dSStefan Hajnoczi }
148130d8bf6dSStefan Hajnoczi }
148230d8bf6dSStefan Hajnoczi
14838607f5c3SJason Wang req = qemu_get_virtqueue_element(vdev, f, sizeof(VirtIOBlockReq));
148430d8bf6dSStefan Hajnoczi virtio_blk_init_request(s, virtio_get_queue(vdev, vq_idx), req);
14859c67f33fSStefan Hajnoczi
14869c67f33fSStefan Hajnoczi WITH_QEMU_LOCK_GUARD(&s->rq_lock) {
14876e790746SPaolo Bonzini req->next = s->rq;
14886e790746SPaolo Bonzini s->rq = req;
14896e790746SPaolo Bonzini }
14909c67f33fSStefan Hajnoczi }
14916e790746SPaolo Bonzini
14926e790746SPaolo Bonzini return 0;
14936e790746SPaolo Bonzini }
14946e790746SPaolo Bonzini
virtio_resize_cb(void * opaque)14959b92fbcfSSergio Lopez static void virtio_resize_cb(void *opaque)
14969b92fbcfSSergio Lopez {
14979b92fbcfSSergio Lopez VirtIODevice *vdev = opaque;
14989b92fbcfSSergio Lopez
14999b92fbcfSSergio Lopez assert(qemu_get_current_aio_context() == qemu_get_aio_context());
15009b92fbcfSSergio Lopez virtio_notify_config(vdev);
15019b92fbcfSSergio Lopez }
15029b92fbcfSSergio Lopez
virtio_blk_resize(void * opaque)15036e790746SPaolo Bonzini static void virtio_blk_resize(void *opaque)
15046e790746SPaolo Bonzini {
15056e790746SPaolo Bonzini VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
15066e790746SPaolo Bonzini
15079b92fbcfSSergio Lopez /*
15080b2675c4SStefan Hajnoczi * virtio_notify_config() needs to acquire the BQL,
15099b92fbcfSSergio Lopez * so it can't be called from an iothread. Instead, schedule
15109b92fbcfSSergio Lopez * it to be run in the main context BH.
15119b92fbcfSSergio Lopez */
15129b92fbcfSSergio Lopez aio_bh_schedule_oneshot(qemu_get_aio_context(), virtio_resize_cb, vdev);
15136e790746SPaolo Bonzini }
15146e790746SPaolo Bonzini
virtio_blk_ioeventfd_detach(VirtIOBlock * s)15153cdaf3ddSStefan Hajnoczi static void virtio_blk_ioeventfd_detach(VirtIOBlock *s)
15163bcc17f0SStefan Hajnoczi {
15173bcc17f0SStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s);
15183bcc17f0SStefan Hajnoczi
15193bcc17f0SStefan Hajnoczi for (uint16_t i = 0; i < s->conf.num_queues; i++) {
15203bcc17f0SStefan Hajnoczi VirtQueue *vq = virtio_get_queue(vdev, i);
15213bcc17f0SStefan Hajnoczi virtio_queue_aio_detach_host_notifier(vq, s->vq_aio_context[i]);
15223bcc17f0SStefan Hajnoczi }
15233bcc17f0SStefan Hajnoczi }
15243bcc17f0SStefan Hajnoczi
virtio_blk_ioeventfd_attach(VirtIOBlock * s)15253cdaf3ddSStefan Hajnoczi static void virtio_blk_ioeventfd_attach(VirtIOBlock *s)
15263bcc17f0SStefan Hajnoczi {
15273bcc17f0SStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s);
15283bcc17f0SStefan Hajnoczi
15293bcc17f0SStefan Hajnoczi for (uint16_t i = 0; i < s->conf.num_queues; i++) {
15303bcc17f0SStefan Hajnoczi VirtQueue *vq = virtio_get_queue(vdev, i);
15313bcc17f0SStefan Hajnoczi virtio_queue_aio_attach_host_notifier(vq, s->vq_aio_context[i]);
15323bcc17f0SStefan Hajnoczi }
15333bcc17f0SStefan Hajnoczi }
15343bcc17f0SStefan Hajnoczi
15351665d932SStefan Hajnoczi /* Suspend virtqueue ioeventfd processing during drain */
virtio_blk_drained_begin(void * opaque)15361665d932SStefan Hajnoczi static void virtio_blk_drained_begin(void *opaque)
15371665d932SStefan Hajnoczi {
15381665d932SStefan Hajnoczi VirtIOBlock *s = opaque;
15391665d932SStefan Hajnoczi
15403cdaf3ddSStefan Hajnoczi if (s->ioeventfd_started) {
15413cdaf3ddSStefan Hajnoczi virtio_blk_ioeventfd_detach(s);
15421665d932SStefan Hajnoczi }
15431665d932SStefan Hajnoczi }
15441665d932SStefan Hajnoczi
15451665d932SStefan Hajnoczi /* Resume virtqueue ioeventfd processing after drain */
virtio_blk_drained_end(void * opaque)15461665d932SStefan Hajnoczi static void virtio_blk_drained_end(void *opaque)
15471665d932SStefan Hajnoczi {
15481665d932SStefan Hajnoczi VirtIOBlock *s = opaque;
15491665d932SStefan Hajnoczi
15503cdaf3ddSStefan Hajnoczi if (s->ioeventfd_started) {
15513cdaf3ddSStefan Hajnoczi virtio_blk_ioeventfd_attach(s);
15521665d932SStefan Hajnoczi }
15531665d932SStefan Hajnoczi }
15541665d932SStefan Hajnoczi
15556e790746SPaolo Bonzini static const BlockDevOps virtio_block_ops = {
15566e790746SPaolo Bonzini .resize_cb = virtio_blk_resize,
15571665d932SStefan Hajnoczi .drained_begin = virtio_blk_drained_begin,
15581665d932SStefan Hajnoczi .drained_end = virtio_blk_drained_end,
15596e790746SPaolo Bonzini };
15606e790746SPaolo Bonzini
15611f995a47SStefan Hajnoczi static bool
validate_iothread_vq_mapping_list(IOThreadVirtQueueMappingList * list,uint16_t num_queues,Error ** errp)15621f995a47SStefan Hajnoczi validate_iothread_vq_mapping_list(IOThreadVirtQueueMappingList *list,
15631f995a47SStefan Hajnoczi uint16_t num_queues, Error **errp)
15641f995a47SStefan Hajnoczi {
15651f995a47SStefan Hajnoczi g_autofree unsigned long *vqs = bitmap_new(num_queues);
15661f995a47SStefan Hajnoczi g_autoptr(GHashTable) iothreads =
15671f995a47SStefan Hajnoczi g_hash_table_new(g_str_hash, g_str_equal);
15681f995a47SStefan Hajnoczi
15691f995a47SStefan Hajnoczi for (IOThreadVirtQueueMappingList *node = list; node; node = node->next) {
15701f995a47SStefan Hajnoczi const char *name = node->value->iothread;
15711f995a47SStefan Hajnoczi uint16List *vq;
15721f995a47SStefan Hajnoczi
15731f995a47SStefan Hajnoczi if (!iothread_by_id(name)) {
15741f995a47SStefan Hajnoczi error_setg(errp, "IOThread \"%s\" object does not exist", name);
15751f995a47SStefan Hajnoczi return false;
15761f995a47SStefan Hajnoczi }
15771f995a47SStefan Hajnoczi
15781f995a47SStefan Hajnoczi if (!g_hash_table_add(iothreads, (gpointer)name)) {
15791f995a47SStefan Hajnoczi error_setg(errp,
15801f995a47SStefan Hajnoczi "duplicate IOThread name \"%s\" in iothread-vq-mapping",
15811f995a47SStefan Hajnoczi name);
15821f995a47SStefan Hajnoczi return false;
15831f995a47SStefan Hajnoczi }
15841f995a47SStefan Hajnoczi
15851f995a47SStefan Hajnoczi if (node != list) {
15861f995a47SStefan Hajnoczi if (!!node->value->vqs != !!list->value->vqs) {
15871f995a47SStefan Hajnoczi error_setg(errp, "either all items in iothread-vq-mapping "
15881f995a47SStefan Hajnoczi "must have vqs or none of them must have it");
15891f995a47SStefan Hajnoczi return false;
15901f995a47SStefan Hajnoczi }
15911f995a47SStefan Hajnoczi }
15921f995a47SStefan Hajnoczi
15931f995a47SStefan Hajnoczi for (vq = node->value->vqs; vq; vq = vq->next) {
15941f995a47SStefan Hajnoczi if (vq->value >= num_queues) {
15951f995a47SStefan Hajnoczi error_setg(errp, "vq index %u for IOThread \"%s\" must be "
15961f995a47SStefan Hajnoczi "less than num_queues %u in iothread-vq-mapping",
15971f995a47SStefan Hajnoczi vq->value, name, num_queues);
15981f995a47SStefan Hajnoczi return false;
15991f995a47SStefan Hajnoczi }
16001f995a47SStefan Hajnoczi
16011f995a47SStefan Hajnoczi if (test_and_set_bit(vq->value, vqs)) {
16021f995a47SStefan Hajnoczi error_setg(errp, "cannot assign vq %u to IOThread \"%s\" "
16031f995a47SStefan Hajnoczi "because it is already assigned", vq->value, name);
16041f995a47SStefan Hajnoczi return false;
16051f995a47SStefan Hajnoczi }
16061f995a47SStefan Hajnoczi }
16071f995a47SStefan Hajnoczi }
16081f995a47SStefan Hajnoczi
16091f995a47SStefan Hajnoczi if (list->value->vqs) {
16101f995a47SStefan Hajnoczi for (uint16_t i = 0; i < num_queues; i++) {
16111f995a47SStefan Hajnoczi if (!test_bit(i, vqs)) {
16121f995a47SStefan Hajnoczi error_setg(errp,
16131f995a47SStefan Hajnoczi "missing vq %u IOThread assignment in iothread-vq-mapping",
16141f995a47SStefan Hajnoczi i);
16151f995a47SStefan Hajnoczi return false;
16161f995a47SStefan Hajnoczi }
16171f995a47SStefan Hajnoczi }
16181f995a47SStefan Hajnoczi }
16191f995a47SStefan Hajnoczi
16201f995a47SStefan Hajnoczi return true;
16211f995a47SStefan Hajnoczi }
16221f995a47SStefan Hajnoczi
16231f995a47SStefan Hajnoczi /**
16241f995a47SStefan Hajnoczi * apply_iothread_vq_mapping:
16251f995a47SStefan Hajnoczi * @iothread_vq_mapping_list: The mapping of virtqueues to IOThreads.
16261f995a47SStefan Hajnoczi * @vq_aio_context: The array of AioContext pointers to fill in.
16271f995a47SStefan Hajnoczi * @num_queues: The length of @vq_aio_context.
16281f995a47SStefan Hajnoczi * @errp: If an error occurs, a pointer to the area to store the error.
16291f995a47SStefan Hajnoczi *
16301f995a47SStefan Hajnoczi * Fill in the AioContext for each virtqueue in the @vq_aio_context array given
16311f995a47SStefan Hajnoczi * the iothread-vq-mapping parameter in @iothread_vq_mapping_list.
16321f995a47SStefan Hajnoczi *
16331f995a47SStefan Hajnoczi * Returns: %true on success, %false on failure.
16341f995a47SStefan Hajnoczi **/
apply_iothread_vq_mapping(IOThreadVirtQueueMappingList * iothread_vq_mapping_list,AioContext ** vq_aio_context,uint16_t num_queues,Error ** errp)16351f995a47SStefan Hajnoczi static bool apply_iothread_vq_mapping(
16361f995a47SStefan Hajnoczi IOThreadVirtQueueMappingList *iothread_vq_mapping_list,
16371f995a47SStefan Hajnoczi AioContext **vq_aio_context,
16381f995a47SStefan Hajnoczi uint16_t num_queues,
16391f995a47SStefan Hajnoczi Error **errp)
16403bcc17f0SStefan Hajnoczi {
16413bcc17f0SStefan Hajnoczi IOThreadVirtQueueMappingList *node;
16423bcc17f0SStefan Hajnoczi size_t num_iothreads = 0;
16433bcc17f0SStefan Hajnoczi size_t cur_iothread = 0;
16443bcc17f0SStefan Hajnoczi
16451f995a47SStefan Hajnoczi if (!validate_iothread_vq_mapping_list(iothread_vq_mapping_list,
16461f995a47SStefan Hajnoczi num_queues, errp)) {
16471f995a47SStefan Hajnoczi return false;
16481f995a47SStefan Hajnoczi }
16491f995a47SStefan Hajnoczi
16503bcc17f0SStefan Hajnoczi for (node = iothread_vq_mapping_list; node; node = node->next) {
16513bcc17f0SStefan Hajnoczi num_iothreads++;
16523bcc17f0SStefan Hajnoczi }
16533bcc17f0SStefan Hajnoczi
16543bcc17f0SStefan Hajnoczi for (node = iothread_vq_mapping_list; node; node = node->next) {
16553bcc17f0SStefan Hajnoczi IOThread *iothread = iothread_by_id(node->value->iothread);
16563bcc17f0SStefan Hajnoczi AioContext *ctx = iothread_get_aio_context(iothread);
16573bcc17f0SStefan Hajnoczi
165857bc2658SStefan Hajnoczi /* Released in virtio_blk_vq_aio_context_cleanup() */
16593bcc17f0SStefan Hajnoczi object_ref(OBJECT(iothread));
16603bcc17f0SStefan Hajnoczi
16613bcc17f0SStefan Hajnoczi if (node->value->vqs) {
16623bcc17f0SStefan Hajnoczi uint16List *vq;
16633bcc17f0SStefan Hajnoczi
16643bcc17f0SStefan Hajnoczi /* Explicit vq:IOThread assignment */
16653bcc17f0SStefan Hajnoczi for (vq = node->value->vqs; vq; vq = vq->next) {
16661f995a47SStefan Hajnoczi assert(vq->value < num_queues);
16673bcc17f0SStefan Hajnoczi vq_aio_context[vq->value] = ctx;
16683bcc17f0SStefan Hajnoczi }
16693bcc17f0SStefan Hajnoczi } else {
16703bcc17f0SStefan Hajnoczi /* Round-robin vq:IOThread assignment */
16713bcc17f0SStefan Hajnoczi for (unsigned i = cur_iothread; i < num_queues;
16723bcc17f0SStefan Hajnoczi i += num_iothreads) {
16733bcc17f0SStefan Hajnoczi vq_aio_context[i] = ctx;
16743bcc17f0SStefan Hajnoczi }
16753bcc17f0SStefan Hajnoczi }
16763bcc17f0SStefan Hajnoczi
16773bcc17f0SStefan Hajnoczi cur_iothread++;
16783bcc17f0SStefan Hajnoczi }
16791f995a47SStefan Hajnoczi
16801f995a47SStefan Hajnoczi return true;
16813bcc17f0SStefan Hajnoczi }
16823bcc17f0SStefan Hajnoczi
16833bcc17f0SStefan Hajnoczi /* Context: BQL held */
virtio_blk_vq_aio_context_init(VirtIOBlock * s,Error ** errp)168457bc2658SStefan Hajnoczi static bool virtio_blk_vq_aio_context_init(VirtIOBlock *s, Error **errp)
16853bcc17f0SStefan Hajnoczi {
16860ea5f594SZhao Liu ERRP_GUARD();
16873bcc17f0SStefan Hajnoczi VirtIODevice *vdev = VIRTIO_DEVICE(s);
16883bcc17f0SStefan Hajnoczi VirtIOBlkConf *conf = &s->conf;
16893bcc17f0SStefan Hajnoczi BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
16903bcc17f0SStefan Hajnoczi VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
16913bcc17f0SStefan Hajnoczi
16921f995a47SStefan Hajnoczi if (conf->iothread && conf->iothread_vq_mapping_list) {
16931f995a47SStefan Hajnoczi error_setg(errp,
16941f995a47SStefan Hajnoczi "iothread and iothread-vq-mapping properties cannot be set "
16951f995a47SStefan Hajnoczi "at the same time");
16961f995a47SStefan Hajnoczi return false;
16971f995a47SStefan Hajnoczi }
16981f995a47SStefan Hajnoczi
16993bcc17f0SStefan Hajnoczi if (conf->iothread || conf->iothread_vq_mapping_list) {
17003bcc17f0SStefan Hajnoczi if (!k->set_guest_notifiers || !k->ioeventfd_assign) {
17013bcc17f0SStefan Hajnoczi error_setg(errp,
17023bcc17f0SStefan Hajnoczi "device is incompatible with iothread "
17033bcc17f0SStefan Hajnoczi "(transport does not support notifiers)");
17043bcc17f0SStefan Hajnoczi return false;
17053bcc17f0SStefan Hajnoczi }
17063bcc17f0SStefan Hajnoczi if (!virtio_device_ioeventfd_enabled(vdev)) {
17073bcc17f0SStefan Hajnoczi error_setg(errp, "ioeventfd is required for iothread");
17083bcc17f0SStefan Hajnoczi return false;
17093bcc17f0SStefan Hajnoczi }
17103bcc17f0SStefan Hajnoczi
17113bcc17f0SStefan Hajnoczi /*
17123cdaf3ddSStefan Hajnoczi * If ioeventfd is (re-)enabled while the guest is running there could
17133bcc17f0SStefan Hajnoczi * be block jobs that can conflict.
17143bcc17f0SStefan Hajnoczi */
17153bcc17f0SStefan Hajnoczi if (blk_op_is_blocked(conf->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) {
17163cdaf3ddSStefan Hajnoczi error_prepend(errp, "cannot start virtio-blk ioeventfd: ");
17173bcc17f0SStefan Hajnoczi return false;
17183bcc17f0SStefan Hajnoczi }
17193bcc17f0SStefan Hajnoczi }
17203bcc17f0SStefan Hajnoczi
17213bcc17f0SStefan Hajnoczi s->vq_aio_context = g_new(AioContext *, conf->num_queues);
17223bcc17f0SStefan Hajnoczi
17233bcc17f0SStefan Hajnoczi if (conf->iothread_vq_mapping_list) {
17241f995a47SStefan Hajnoczi if (!apply_iothread_vq_mapping(conf->iothread_vq_mapping_list,
17251f995a47SStefan Hajnoczi s->vq_aio_context,
17261f995a47SStefan Hajnoczi conf->num_queues,
17271f995a47SStefan Hajnoczi errp)) {
17281f995a47SStefan Hajnoczi g_free(s->vq_aio_context);
17291f995a47SStefan Hajnoczi s->vq_aio_context = NULL;
17301f995a47SStefan Hajnoczi return false;
17311f995a47SStefan Hajnoczi }
17323bcc17f0SStefan Hajnoczi } else if (conf->iothread) {
17333bcc17f0SStefan Hajnoczi AioContext *ctx = iothread_get_aio_context(conf->iothread);
17343bcc17f0SStefan Hajnoczi for (unsigned i = 0; i < conf->num_queues; i++) {
17353bcc17f0SStefan Hajnoczi s->vq_aio_context[i] = ctx;
17363bcc17f0SStefan Hajnoczi }
17373bcc17f0SStefan Hajnoczi
173857bc2658SStefan Hajnoczi /* Released in virtio_blk_vq_aio_context_cleanup() */
17393bcc17f0SStefan Hajnoczi object_ref(OBJECT(conf->iothread));
17403bcc17f0SStefan Hajnoczi } else {
17413bcc17f0SStefan Hajnoczi AioContext *ctx = qemu_get_aio_context();
17423bcc17f0SStefan Hajnoczi for (unsigned i = 0; i < conf->num_queues; i++) {
17433bcc17f0SStefan Hajnoczi s->vq_aio_context[i] = ctx;
17443bcc17f0SStefan Hajnoczi }
17453bcc17f0SStefan Hajnoczi }
17463bcc17f0SStefan Hajnoczi
17473bcc17f0SStefan Hajnoczi return true;
17483bcc17f0SStefan Hajnoczi }
17493bcc17f0SStefan Hajnoczi
17503bcc17f0SStefan Hajnoczi /* Context: BQL held */
virtio_blk_vq_aio_context_cleanup(VirtIOBlock * s)175157bc2658SStefan Hajnoczi static void virtio_blk_vq_aio_context_cleanup(VirtIOBlock *s)
17523bcc17f0SStefan Hajnoczi {
17533bcc17f0SStefan Hajnoczi VirtIOBlkConf *conf = &s->conf;
17543bcc17f0SStefan Hajnoczi
17553cdaf3ddSStefan Hajnoczi assert(!s->ioeventfd_started);
17563bcc17f0SStefan Hajnoczi
17573bcc17f0SStefan Hajnoczi if (conf->iothread_vq_mapping_list) {
17583bcc17f0SStefan Hajnoczi IOThreadVirtQueueMappingList *node;
17593bcc17f0SStefan Hajnoczi
17603bcc17f0SStefan Hajnoczi for (node = conf->iothread_vq_mapping_list; node; node = node->next) {
17613bcc17f0SStefan Hajnoczi IOThread *iothread = iothread_by_id(node->value->iothread);
17623bcc17f0SStefan Hajnoczi object_unref(OBJECT(iothread));
17633bcc17f0SStefan Hajnoczi }
17643bcc17f0SStefan Hajnoczi }
17653bcc17f0SStefan Hajnoczi
17663bcc17f0SStefan Hajnoczi if (conf->iothread) {
17673bcc17f0SStefan Hajnoczi object_unref(OBJECT(conf->iothread));
17683bcc17f0SStefan Hajnoczi }
17693bcc17f0SStefan Hajnoczi
17703bcc17f0SStefan Hajnoczi g_free(s->vq_aio_context);
17713bcc17f0SStefan Hajnoczi s->vq_aio_context = NULL;
17723bcc17f0SStefan Hajnoczi }
17733bcc17f0SStefan Hajnoczi
17743bcc17f0SStefan Hajnoczi /* Context: BQL held */
virtio_blk_start_ioeventfd(VirtIODevice * vdev)17753cdaf3ddSStefan Hajnoczi static int virtio_blk_start_ioeventfd(VirtIODevice *vdev)
17763bcc17f0SStefan Hajnoczi {
17773bcc17f0SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(vdev);
17783bcc17f0SStefan Hajnoczi BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s)));
17793bcc17f0SStefan Hajnoczi VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
17803bcc17f0SStefan Hajnoczi unsigned i;
17813bcc17f0SStefan Hajnoczi unsigned nvqs = s->conf.num_queues;
17823bcc17f0SStefan Hajnoczi Error *local_err = NULL;
17833bcc17f0SStefan Hajnoczi int r;
17843bcc17f0SStefan Hajnoczi
17853cdaf3ddSStefan Hajnoczi if (s->ioeventfd_started || s->ioeventfd_starting) {
17863bcc17f0SStefan Hajnoczi return 0;
17873bcc17f0SStefan Hajnoczi }
17883bcc17f0SStefan Hajnoczi
17893cdaf3ddSStefan Hajnoczi s->ioeventfd_starting = true;
17903bcc17f0SStefan Hajnoczi
17913bcc17f0SStefan Hajnoczi /* Set up guest notifier (irq) */
17923bcc17f0SStefan Hajnoczi r = k->set_guest_notifiers(qbus->parent, nvqs, true);
17933bcc17f0SStefan Hajnoczi if (r != 0) {
17943bcc17f0SStefan Hajnoczi error_report("virtio-blk failed to set guest notifier (%d), "
17953bcc17f0SStefan Hajnoczi "ensure -accel kvm is set.", r);
17963bcc17f0SStefan Hajnoczi goto fail_guest_notifiers;
17973bcc17f0SStefan Hajnoczi }
17983bcc17f0SStefan Hajnoczi
17993bcc17f0SStefan Hajnoczi /*
18003bcc17f0SStefan Hajnoczi * Batch all the host notifiers in a single transaction to avoid
18013bcc17f0SStefan Hajnoczi * quadratic time complexity in address_space_update_ioeventfds().
18023bcc17f0SStefan Hajnoczi */
18033bcc17f0SStefan Hajnoczi memory_region_transaction_begin();
18043bcc17f0SStefan Hajnoczi
18053bcc17f0SStefan Hajnoczi /* Set up virtqueue notify */
18063bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) {
18073bcc17f0SStefan Hajnoczi r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, true);
18083bcc17f0SStefan Hajnoczi if (r != 0) {
18093bcc17f0SStefan Hajnoczi int j = i;
18103bcc17f0SStefan Hajnoczi
18113bcc17f0SStefan Hajnoczi fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r);
18123bcc17f0SStefan Hajnoczi while (i--) {
18133bcc17f0SStefan Hajnoczi virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
18143bcc17f0SStefan Hajnoczi }
18153bcc17f0SStefan Hajnoczi
18163bcc17f0SStefan Hajnoczi /*
18173bcc17f0SStefan Hajnoczi * The transaction expects the ioeventfds to be open when it
18183bcc17f0SStefan Hajnoczi * commits. Do it now, before the cleanup loop.
18193bcc17f0SStefan Hajnoczi */
18203bcc17f0SStefan Hajnoczi memory_region_transaction_commit();
18213bcc17f0SStefan Hajnoczi
18223bcc17f0SStefan Hajnoczi while (j--) {
18233bcc17f0SStefan Hajnoczi virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), j);
18243bcc17f0SStefan Hajnoczi }
18253bcc17f0SStefan Hajnoczi goto fail_host_notifiers;
18263bcc17f0SStefan Hajnoczi }
18273bcc17f0SStefan Hajnoczi }
18283bcc17f0SStefan Hajnoczi
18293bcc17f0SStefan Hajnoczi memory_region_transaction_commit();
18303bcc17f0SStefan Hajnoczi
1831ea0736d7SStefan Hajnoczi /*
1832ea0736d7SStefan Hajnoczi * Try to change the AioContext so that block jobs and other operations can
1833ea0736d7SStefan Hajnoczi * co-locate their activity in the same AioContext. If it fails, nevermind.
1834ea0736d7SStefan Hajnoczi */
18355fbcbd50SStefan Hajnoczi assert(nvqs > 0); /* enforced during ->realize() */
18363bcc17f0SStefan Hajnoczi r = blk_set_aio_context(s->conf.conf.blk, s->vq_aio_context[0],
18373bcc17f0SStefan Hajnoczi &local_err);
18383bcc17f0SStefan Hajnoczi if (r < 0) {
1839ea0736d7SStefan Hajnoczi warn_report_err(local_err);
18403bcc17f0SStefan Hajnoczi }
18413bcc17f0SStefan Hajnoczi
18423bcc17f0SStefan Hajnoczi /*
18433bcc17f0SStefan Hajnoczi * These fields must be visible to the IOThread when it processes the
18443cdaf3ddSStefan Hajnoczi * virtqueue, otherwise it will think ioeventfd has not started yet.
18453bcc17f0SStefan Hajnoczi *
18463cdaf3ddSStefan Hajnoczi * Make sure ->ioeventfd_started is false when blk_set_aio_context() is
18473bcc17f0SStefan Hajnoczi * called above so that draining does not cause the host notifier to be
18483bcc17f0SStefan Hajnoczi * detached/attached prematurely.
18493bcc17f0SStefan Hajnoczi */
18503cdaf3ddSStefan Hajnoczi s->ioeventfd_starting = false;
18513cdaf3ddSStefan Hajnoczi s->ioeventfd_started = true;
18523bcc17f0SStefan Hajnoczi smp_wmb(); /* paired with aio_notify_accept() on the read side */
18533bcc17f0SStefan Hajnoczi
185452bff01fSHanna Czenczek /*
185552bff01fSHanna Czenczek * Get this show started by hooking up our callbacks. If drained now,
185652bff01fSHanna Czenczek * virtio_blk_drained_end() will do this later.
185752bff01fSHanna Czenczek * Attaching the notifier also kicks the virtqueues, processing any requests
185852bff01fSHanna Czenczek * they may already have.
185952bff01fSHanna Czenczek */
1860d3f6f294SStefan Hajnoczi if (!blk_in_drain(s->conf.conf.blk)) {
186152bff01fSHanna Czenczek virtio_blk_ioeventfd_attach(s);
18623bcc17f0SStefan Hajnoczi }
18633bcc17f0SStefan Hajnoczi return 0;
18643bcc17f0SStefan Hajnoczi
18653bcc17f0SStefan Hajnoczi fail_host_notifiers:
18663bcc17f0SStefan Hajnoczi k->set_guest_notifiers(qbus->parent, nvqs, false);
18673bcc17f0SStefan Hajnoczi fail_guest_notifiers:
18683cdaf3ddSStefan Hajnoczi s->ioeventfd_disabled = true;
18693cdaf3ddSStefan Hajnoczi s->ioeventfd_starting = false;
18703bcc17f0SStefan Hajnoczi return -ENOSYS;
18713bcc17f0SStefan Hajnoczi }
18723bcc17f0SStefan Hajnoczi
18733bcc17f0SStefan Hajnoczi /* Stop notifications for new requests from guest.
18743bcc17f0SStefan Hajnoczi *
18753bcc17f0SStefan Hajnoczi * Context: BH in IOThread
18763bcc17f0SStefan Hajnoczi */
virtio_blk_ioeventfd_stop_vq_bh(void * opaque)18773cdaf3ddSStefan Hajnoczi static void virtio_blk_ioeventfd_stop_vq_bh(void *opaque)
18783bcc17f0SStefan Hajnoczi {
18793bcc17f0SStefan Hajnoczi VirtQueue *vq = opaque;
18803bcc17f0SStefan Hajnoczi EventNotifier *host_notifier = virtio_queue_get_host_notifier(vq);
18813bcc17f0SStefan Hajnoczi
18823bcc17f0SStefan Hajnoczi virtio_queue_aio_detach_host_notifier(vq, qemu_get_current_aio_context());
18833bcc17f0SStefan Hajnoczi
18843bcc17f0SStefan Hajnoczi /*
18853bcc17f0SStefan Hajnoczi * Test and clear notifier after disabling event, in case poll callback
18863bcc17f0SStefan Hajnoczi * didn't have time to run.
18873bcc17f0SStefan Hajnoczi */
18883bcc17f0SStefan Hajnoczi virtio_queue_host_notifier_read(host_notifier);
18893bcc17f0SStefan Hajnoczi }
18903bcc17f0SStefan Hajnoczi
18913bcc17f0SStefan Hajnoczi /* Context: BQL held */
virtio_blk_stop_ioeventfd(VirtIODevice * vdev)18923cdaf3ddSStefan Hajnoczi static void virtio_blk_stop_ioeventfd(VirtIODevice *vdev)
18933bcc17f0SStefan Hajnoczi {
18943bcc17f0SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(vdev);
18953bcc17f0SStefan Hajnoczi BusState *qbus = qdev_get_parent_bus(DEVICE(s));
18963bcc17f0SStefan Hajnoczi VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
18973bcc17f0SStefan Hajnoczi unsigned i;
18983bcc17f0SStefan Hajnoczi unsigned nvqs = s->conf.num_queues;
18993bcc17f0SStefan Hajnoczi
19003cdaf3ddSStefan Hajnoczi if (!s->ioeventfd_started || s->ioeventfd_stopping) {
19013bcc17f0SStefan Hajnoczi return;
19023bcc17f0SStefan Hajnoczi }
19033bcc17f0SStefan Hajnoczi
19043bcc17f0SStefan Hajnoczi /* Better luck next time. */
19053cdaf3ddSStefan Hajnoczi if (s->ioeventfd_disabled) {
19063cdaf3ddSStefan Hajnoczi s->ioeventfd_disabled = false;
19073cdaf3ddSStefan Hajnoczi s->ioeventfd_started = false;
19083bcc17f0SStefan Hajnoczi return;
19093bcc17f0SStefan Hajnoczi }
19103cdaf3ddSStefan Hajnoczi s->ioeventfd_stopping = true;
19113bcc17f0SStefan Hajnoczi
19123bcc17f0SStefan Hajnoczi if (!blk_in_drain(s->conf.conf.blk)) {
19133bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) {
19143bcc17f0SStefan Hajnoczi VirtQueue *vq = virtio_get_queue(vdev, i);
19153bcc17f0SStefan Hajnoczi AioContext *ctx = s->vq_aio_context[i];
19163bcc17f0SStefan Hajnoczi
19173cdaf3ddSStefan Hajnoczi aio_wait_bh_oneshot(ctx, virtio_blk_ioeventfd_stop_vq_bh, vq);
19183bcc17f0SStefan Hajnoczi }
19193bcc17f0SStefan Hajnoczi }
19203bcc17f0SStefan Hajnoczi
19213bcc17f0SStefan Hajnoczi /*
19223bcc17f0SStefan Hajnoczi * Batch all the host notifiers in a single transaction to avoid
19233bcc17f0SStefan Hajnoczi * quadratic time complexity in address_space_update_ioeventfds().
19243bcc17f0SStefan Hajnoczi */
19253bcc17f0SStefan Hajnoczi memory_region_transaction_begin();
19263bcc17f0SStefan Hajnoczi
19273bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) {
19283bcc17f0SStefan Hajnoczi virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
19293bcc17f0SStefan Hajnoczi }
19303bcc17f0SStefan Hajnoczi
19313bcc17f0SStefan Hajnoczi /*
19323bcc17f0SStefan Hajnoczi * The transaction expects the ioeventfds to be open when it
19333bcc17f0SStefan Hajnoczi * commits. Do it now, before the cleanup loop.
19343bcc17f0SStefan Hajnoczi */
19353bcc17f0SStefan Hajnoczi memory_region_transaction_commit();
19363bcc17f0SStefan Hajnoczi
19373bcc17f0SStefan Hajnoczi for (i = 0; i < nvqs; i++) {
19383bcc17f0SStefan Hajnoczi virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
19393bcc17f0SStefan Hajnoczi }
19403bcc17f0SStefan Hajnoczi
19413bcc17f0SStefan Hajnoczi /*
19423cdaf3ddSStefan Hajnoczi * Set ->ioeventfd_started to false before draining so that host notifiers
19433bcc17f0SStefan Hajnoczi * are not detached/attached anymore.
19443bcc17f0SStefan Hajnoczi */
19453cdaf3ddSStefan Hajnoczi s->ioeventfd_started = false;
19463bcc17f0SStefan Hajnoczi
19473bcc17f0SStefan Hajnoczi /* Wait for virtio_blk_dma_restart_bh() and in flight I/O to complete */
19483bcc17f0SStefan Hajnoczi blk_drain(s->conf.conf.blk);
19493bcc17f0SStefan Hajnoczi
19503bcc17f0SStefan Hajnoczi /*
19513bcc17f0SStefan Hajnoczi * Try to switch bs back to the QEMU main loop. If other users keep the
19523bcc17f0SStefan Hajnoczi * BlockBackend in the iothread, that's ok
19533bcc17f0SStefan Hajnoczi */
19543bcc17f0SStefan Hajnoczi blk_set_aio_context(s->conf.conf.blk, qemu_get_aio_context(), NULL);
19553bcc17f0SStefan Hajnoczi
19563bcc17f0SStefan Hajnoczi /* Clean up guest notifier (irq) */
19573bcc17f0SStefan Hajnoczi k->set_guest_notifiers(qbus->parent, nvqs, false);
19583bcc17f0SStefan Hajnoczi
19593cdaf3ddSStefan Hajnoczi s->ioeventfd_stopping = false;
19603bcc17f0SStefan Hajnoczi }
19613bcc17f0SStefan Hajnoczi
virtio_blk_device_realize(DeviceState * dev,Error ** errp)196275884afdSAndreas Färber static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
19636e790746SPaolo Bonzini {
196475884afdSAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1965179b417eSAndreas Färber VirtIOBlock *s = VIRTIO_BLK(dev);
19662a30307fSMarkus Armbruster VirtIOBlkConf *conf = &s->conf;
1967b3d9bb9aSStefan Hajnoczi BlockDriverState *bs;
19683ffeeef7SAndreas Färber Error *err = NULL;
19692f270590SStefan Hajnoczi unsigned i;
19706e790746SPaolo Bonzini
19714be74634SMarkus Armbruster if (!conf->conf.blk) {
197275884afdSAndreas Färber error_setg(errp, "drive property not set");
197375884afdSAndreas Färber return;
19746e790746SPaolo Bonzini }
19754be74634SMarkus Armbruster if (!blk_is_inserted(conf->conf.blk)) {
197675884afdSAndreas Färber error_setg(errp, "Device needs media, but drive is empty");
197775884afdSAndreas Färber return;
19786e790746SPaolo Bonzini }
19799445e1e1SStefan Hajnoczi if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) {
19809445e1e1SStefan Hajnoczi conf->num_queues = 1;
19819445e1e1SStefan Hajnoczi }
19822f270590SStefan Hajnoczi if (!conf->num_queues) {
19832f270590SStefan Hajnoczi error_setg(errp, "num-queues property must be larger than 0");
19842f270590SStefan Hajnoczi return;
19852f270590SStefan Hajnoczi }
19861bf8a989SDenis Plotnikov if (conf->queue_size <= 2) {
19871bf8a989SDenis Plotnikov error_setg(errp, "invalid queue-size property (%" PRIu16 "), "
19881bf8a989SDenis Plotnikov "must be > 2", conf->queue_size);
19891bf8a989SDenis Plotnikov return;
19901bf8a989SDenis Plotnikov }
19916040aeddSMark Kanda if (!is_power_of_2(conf->queue_size) ||
19926040aeddSMark Kanda conf->queue_size > VIRTQUEUE_MAX_SIZE) {
19936040aeddSMark Kanda error_setg(errp, "invalid queue-size property (%" PRIu16 "), "
19946040aeddSMark Kanda "must be a power of 2 (max %d)",
19956040aeddSMark Kanda conf->queue_size, VIRTQUEUE_MAX_SIZE);
19966040aeddSMark Kanda return;
19976040aeddSMark Kanda }
19986e790746SPaolo Bonzini
1999ceff3e1fSMao Zhongyi if (!blkconf_apply_backend_options(&conf->conf,
200086b1cf32SKevin Wolf !blk_supports_write_perm(conf->conf.blk),
200186b1cf32SKevin Wolf true, errp)) {
2002a17c17a2SKevin Wolf return;
2003a17c17a2SKevin Wolf }
20044be74634SMarkus Armbruster s->original_wce = blk_enable_write_cache(conf->conf.blk);
2005ceff3e1fSMao Zhongyi if (!blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, errp)) {
200675884afdSAndreas Färber return;
20076e790746SPaolo Bonzini }
2008ceff3e1fSMao Zhongyi
2009c56ee92fSRoman Kagan if (!blkconf_blocksizes(&conf->conf, errp)) {
20100a75b60cSMark Kanda return;
20110a75b60cSMark Kanda }
20120a75b60cSMark Kanda
2013b3d9bb9aSStefan Hajnoczi bs = blk_bs(conf->conf.blk);
20144f736650SSam Li if (bs->bl.zoned != BLK_Z_NONE) {
20154f736650SSam Li virtio_add_feature(&s->host_features, VIRTIO_BLK_F_ZONED);
20164f736650SSam Li if (bs->bl.zoned == BLK_Z_HM) {
20174f736650SSam Li virtio_clear_feature(&s->host_features, VIRTIO_BLK_F_DISCARD);
20184f736650SSam Li }
20194f736650SSam Li }
20204f736650SSam Li
202137b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD) &&
202237b06f8dSStefano Garzarella (!conf->max_discard_sectors ||
202337b06f8dSStefano Garzarella conf->max_discard_sectors > BDRV_REQUEST_MAX_SECTORS)) {
202437b06f8dSStefano Garzarella error_setg(errp, "invalid max-discard-sectors property (%" PRIu32 ")"
202537b06f8dSStefano Garzarella ", must be between 1 and %d",
202637b06f8dSStefano Garzarella conf->max_discard_sectors, (int)BDRV_REQUEST_MAX_SECTORS);
202737b06f8dSStefano Garzarella return;
202837b06f8dSStefano Garzarella }
202937b06f8dSStefano Garzarella
203037b06f8dSStefano Garzarella if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_WRITE_ZEROES) &&
203137b06f8dSStefano Garzarella (!conf->max_write_zeroes_sectors ||
203237b06f8dSStefano Garzarella conf->max_write_zeroes_sectors > BDRV_REQUEST_MAX_SECTORS)) {
203337b06f8dSStefano Garzarella error_setg(errp, "invalid max-write-zeroes-sectors property (%" PRIu32
203437b06f8dSStefano Garzarella "), must be between 1 and %d",
203537b06f8dSStefano Garzarella conf->max_write_zeroes_sectors,
203637b06f8dSStefano Garzarella (int)BDRV_REQUEST_MAX_SECTORS);
203737b06f8dSStefano Garzarella return;
203837b06f8dSStefano Garzarella }
203937b06f8dSStefano Garzarella
2040d9cf55a8SDaniil Tatianin s->config_size = virtio_get_config_size(&virtio_blk_cfg_size_params,
2041d74c30c8SDaniil Tatianin s->host_features);
20423857cd5cSJonah Palmer virtio_init(vdev, VIRTIO_ID_BLOCK, s->config_size);
20436e790746SPaolo Bonzini
20449c67f33fSStefan Hajnoczi qemu_mutex_init(&s->rq_lock);
20459c67f33fSStefan Hajnoczi
20464be74634SMarkus Armbruster s->blk = conf->conf.blk;
20476e790746SPaolo Bonzini s->rq = NULL;
20482a30307fSMarkus Armbruster s->sector_mask = (s->conf.conf.logical_block_size / BDRV_SECTOR_SIZE) - 1;
20496e790746SPaolo Bonzini
20502f270590SStefan Hajnoczi for (i = 0; i < conf->num_queues; i++) {
20516040aeddSMark Kanda virtio_add_queue(vdev, conf->queue_size, virtio_blk_handle_output);
20522f270590SStefan Hajnoczi }
205398e3ab35SKevin Wolf qemu_coroutine_inc_pool_size(conf->num_queues * conf->queue_size / 2);
205457bc2658SStefan Hajnoczi
20553cdaf3ddSStefan Hajnoczi /* Don't start ioeventfd if transport does not support notifiers. */
205657bc2658SStefan Hajnoczi if (!virtio_device_ioeventfd_enabled(vdev)) {
20573cdaf3ddSStefan Hajnoczi s->ioeventfd_disabled = true;
205857bc2658SStefan Hajnoczi }
205957bc2658SStefan Hajnoczi
206057bc2658SStefan Hajnoczi virtio_blk_vq_aio_context_init(s, &err);
20613ffeeef7SAndreas Färber if (err != NULL) {
206275884afdSAndreas Färber error_propagate(errp, err);
2063cfaf757eSPan Nengyuan for (i = 0; i < conf->num_queues; i++) {
2064cfaf757eSPan Nengyuan virtio_del_queue(vdev, i);
2065cfaf757eSPan Nengyuan }
20666a1a8cc7SKONRAD Frederic virtio_cleanup(vdev);
206775884afdSAndreas Färber return;
20686e790746SPaolo Bonzini }
20696e790746SPaolo Bonzini
2070a937f8e8SStefan Hajnoczi /*
2071a937f8e8SStefan Hajnoczi * This must be after virtio_init() so virtio_blk_dma_restart_cb() gets
2072a937f8e8SStefan Hajnoczi * called after ->start_ioeventfd() has already set blk's AioContext.
2073a937f8e8SStefan Hajnoczi */
2074a937f8e8SStefan Hajnoczi s->change =
2075a937f8e8SStefan Hajnoczi qdev_add_vm_change_state_handler(dev, virtio_blk_dma_restart_cb, s);
2076a937f8e8SStefan Hajnoczi
2077baf42268SStefan Hajnoczi blk_ram_registrar_init(&s->blk_ram_registrar, s->blk);
20784be74634SMarkus Armbruster blk_set_dev_ops(s->blk, &virtio_block_ops, s);
20796e790746SPaolo Bonzini
20804be74634SMarkus Armbruster blk_iostatus_enable(s->blk);
208171f571a2SSam Eiderman
208271f571a2SSam Eiderman add_boot_device_lchs(dev, "/disk@0,0",
208371f571a2SSam Eiderman conf->conf.lcyls,
208471f571a2SSam Eiderman conf->conf.lheads,
208571f571a2SSam Eiderman conf->conf.lsecs);
20866e790746SPaolo Bonzini }
20876e790746SPaolo Bonzini
virtio_blk_device_unrealize(DeviceState * dev)2088b69c3c21SMarkus Armbruster static void virtio_blk_device_unrealize(DeviceState *dev)
20896e790746SPaolo Bonzini {
2090306ec6c3SAndreas Färber VirtIODevice *vdev = VIRTIO_DEVICE(dev);
2091306ec6c3SAndreas Färber VirtIOBlock *s = VIRTIO_BLK(dev);
20924a0117cfSEugenio Pérez VirtIOBlkConf *conf = &s->conf;
20934a0117cfSEugenio Pérez unsigned i;
2094306ec6c3SAndreas Färber
20957bfde688SJulia Suvorova blk_drain(s->blk);
209671f571a2SSam Eiderman del_boot_device_lchs(dev, "/disk@0,0");
209757bc2658SStefan Hajnoczi virtio_blk_vq_aio_context_cleanup(s);
20984a0117cfSEugenio Pérez for (i = 0; i < conf->num_queues; i++) {
20994a0117cfSEugenio Pérez virtio_del_queue(vdev, i);
21004a0117cfSEugenio Pérez }
210198e3ab35SKevin Wolf qemu_coroutine_dec_pool_size(conf->num_queues * conf->queue_size / 2);
21029c67f33fSStefan Hajnoczi qemu_mutex_destroy(&s->rq_lock);
2103baf42268SStefan Hajnoczi blk_ram_registrar_destroy(&s->blk_ram_registrar);
21046e790746SPaolo Bonzini qemu_del_vm_change_state_handler(s->change);
21054be74634SMarkus Armbruster blockdev_mark_auto_del(s->blk);
21066a1a8cc7SKONRAD Frederic virtio_cleanup(vdev);
21076e790746SPaolo Bonzini }
21086e790746SPaolo Bonzini
virtio_blk_instance_init(Object * obj)2109467b3f33SStefan Hajnoczi static void virtio_blk_instance_init(Object *obj)
2110467b3f33SStefan Hajnoczi {
2111467b3f33SStefan Hajnoczi VirtIOBlock *s = VIRTIO_BLK(obj);
2112467b3f33SStefan Hajnoczi
21132a30307fSMarkus Armbruster device_add_bootindex_property(obj, &s->conf.conf.bootindex,
21143342ec32SGonglei "bootindex", "/disk@0,0",
211540c2281cSMarkus Armbruster DEVICE(obj));
2116467b3f33SStefan Hajnoczi }
2117467b3f33SStefan Hajnoczi
2118977a117fSHalil Pasic static const VMStateDescription vmstate_virtio_blk = {
2119977a117fSHalil Pasic .name = "virtio-blk",
2120977a117fSHalil Pasic .minimum_version_id = 2,
2121977a117fSHalil Pasic .version_id = 2,
21227d5dc0a3SRichard Henderson .fields = (const VMStateField[]) {
2123977a117fSHalil Pasic VMSTATE_VIRTIO_DEVICE,
2124977a117fSHalil Pasic VMSTATE_END_OF_LIST()
2125977a117fSHalil Pasic },
2126977a117fSHalil Pasic };
2127bbded32cSDr. David Alan Gilbert
21286e790746SPaolo Bonzini static Property virtio_blk_properties[] = {
21292a30307fSMarkus Armbruster DEFINE_BLOCK_PROPERTIES(VirtIOBlock, conf.conf),
21308c398252SKevin Wolf DEFINE_BLOCK_ERROR_PROPERTIES(VirtIOBlock, conf.conf),
21312a30307fSMarkus Armbruster DEFINE_BLOCK_CHS_PROPERTIES(VirtIOBlock, conf.conf),
21322a30307fSMarkus Armbruster DEFINE_PROP_STRING("serial", VirtIOBlock, conf.serial),
2133bbe8bd4dSStefano Garzarella DEFINE_PROP_BIT64("config-wce", VirtIOBlock, host_features,
2134bbe8bd4dSStefano Garzarella VIRTIO_BLK_F_CONFIG_WCE, true),
213532a877e4SStefan Hajnoczi #ifdef __linux__
2136bbe8bd4dSStefano Garzarella DEFINE_PROP_BIT64("scsi", VirtIOBlock, host_features,
2137bbe8bd4dSStefano Garzarella VIRTIO_BLK_F_SCSI, false),
213832a877e4SStefan Hajnoczi #endif
2139c99495acSPeter Lieven DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, 0,
2140c99495acSPeter Lieven true),
21419445e1e1SStefan Hajnoczi DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues,
21429445e1e1SStefan Hajnoczi VIRTIO_BLK_AUTO_NUM_QUEUES),
2143c9b7d9ecSDenis Plotnikov DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 256),
21441bf8a989SDenis Plotnikov DEFINE_PROP_BOOL("seg-max-adjust", VirtIOBlock, conf.seg_max_adjust, true),
2145d679ac09SFam Zheng DEFINE_PROP_LINK("iothread", VirtIOBlock, conf.iothread, TYPE_IOTHREAD,
2146d679ac09SFam Zheng IOThread *),
2147b6948ab0SStefan Hajnoczi DEFINE_PROP_IOTHREAD_VQ_MAPPING_LIST("iothread-vq-mapping", VirtIOBlock,
2148b6948ab0SStefan Hajnoczi conf.iothread_vq_mapping_list),
21495c81161fSStefano Garzarella DEFINE_PROP_BIT64("discard", VirtIOBlock, host_features,
21505c81161fSStefano Garzarella VIRTIO_BLK_F_DISCARD, true),
2151fb0b154cSAkihiko Odaki DEFINE_PROP_BOOL("report-discard-granularity", VirtIOBlock,
2152fb0b154cSAkihiko Odaki conf.report_discard_granularity, true),
21535c81161fSStefano Garzarella DEFINE_PROP_BIT64("write-zeroes", VirtIOBlock, host_features,
21545c81161fSStefano Garzarella VIRTIO_BLK_F_WRITE_ZEROES, true),
215537b06f8dSStefano Garzarella DEFINE_PROP_UINT32("max-discard-sectors", VirtIOBlock,
215637b06f8dSStefano Garzarella conf.max_discard_sectors, BDRV_REQUEST_MAX_SECTORS),
215737b06f8dSStefano Garzarella DEFINE_PROP_UINT32("max-write-zeroes-sectors", VirtIOBlock,
215837b06f8dSStefano Garzarella conf.max_write_zeroes_sectors, BDRV_REQUEST_MAX_SECTORS),
21595f258577SEvgeny Yakovlev DEFINE_PROP_BOOL("x-enable-wce-if-config-wce", VirtIOBlock,
21605f258577SEvgeny Yakovlev conf.x_enable_wce_if_config_wce, true),
21616e790746SPaolo Bonzini DEFINE_PROP_END_OF_LIST(),
21626e790746SPaolo Bonzini };
21636e790746SPaolo Bonzini
virtio_blk_class_init(ObjectClass * klass,void * data)21646e790746SPaolo Bonzini static void virtio_blk_class_init(ObjectClass *klass, void *data)
21656e790746SPaolo Bonzini {
21666e790746SPaolo Bonzini DeviceClass *dc = DEVICE_CLASS(klass);
21676e790746SPaolo Bonzini VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
216875884afdSAndreas Färber
21694f67d30bSMarc-André Lureau device_class_set_props(dc, virtio_blk_properties);
2170bbded32cSDr. David Alan Gilbert dc->vmsd = &vmstate_virtio_blk;
2171125ee0edSMarcel Apfelbaum set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
217275884afdSAndreas Färber vdc->realize = virtio_blk_device_realize;
2173306ec6c3SAndreas Färber vdc->unrealize = virtio_blk_device_unrealize;
21746e790746SPaolo Bonzini vdc->get_config = virtio_blk_update_config;
21756e790746SPaolo Bonzini vdc->set_config = virtio_blk_set_config;
21766e790746SPaolo Bonzini vdc->get_features = virtio_blk_get_features;
21776e790746SPaolo Bonzini vdc->set_status = virtio_blk_set_status;
21786e790746SPaolo Bonzini vdc->reset = virtio_blk_reset;
2179b2b295a7SGreg Kurz vdc->save = virtio_blk_save_device;
2180b2b295a7SGreg Kurz vdc->load = virtio_blk_load_device;
21813cdaf3ddSStefan Hajnoczi vdc->start_ioeventfd = virtio_blk_start_ioeventfd;
21823cdaf3ddSStefan Hajnoczi vdc->stop_ioeventfd = virtio_blk_stop_ioeventfd;
21836e790746SPaolo Bonzini }
21846e790746SPaolo Bonzini
2185b5c7ceafSChanglong Xie static const TypeInfo virtio_blk_info = {
21866e790746SPaolo Bonzini .name = TYPE_VIRTIO_BLK,
21876e790746SPaolo Bonzini .parent = TYPE_VIRTIO_DEVICE,
21886e790746SPaolo Bonzini .instance_size = sizeof(VirtIOBlock),
2189467b3f33SStefan Hajnoczi .instance_init = virtio_blk_instance_init,
21906e790746SPaolo Bonzini .class_init = virtio_blk_class_init,
21916e790746SPaolo Bonzini };
21926e790746SPaolo Bonzini
virtio_register_types(void)21936e790746SPaolo Bonzini static void virtio_register_types(void)
21946e790746SPaolo Bonzini {
2195b5c7ceafSChanglong Xie type_register_static(&virtio_blk_info);
21966e790746SPaolo Bonzini }
21976e790746SPaolo Bonzini
21986e790746SPaolo Bonzini type_init(virtio_register_types)
2199