bool progress = false;
/*
- * We have to walk very carefully in case qemu_aio_set_fd_handler is
+ * We have to walk very carefully in case aio_set_fd_handler is
* called while we're walking.
*/
node = QLIST_FIRST(&ctx->aio_handlers);
bool aio_poll(AioContext *ctx, bool blocking)
{
AioHandler *node;
+ bool was_dispatching;
int ret;
bool progress;
+ was_dispatching = ctx->dispatching;
progress = false;
+ /* aio_notify can avoid the expensive event_notifier_set if
+ * everything (file descriptors, bottom halves, timers) will
+ * be re-evaluated before the next blocking poll(). This happens
+ * in two cases:
+ *
+ * 1) when aio_poll is called with blocking == false
+ *
+ * 2) when we are called after poll(). If we are called before
+ * poll(), bottom halves will not be re-evaluated and we need
+ * aio_notify() if blocking == true.
+ *
+ * The first aio_dispatch() only does something when AioContext is
+ * running as a GSource, and in that case aio_poll is used only
+ * with blocking == false, so this optimization is already quite
+ * effective. However, the code is ugly and should be restructured
+ * to have a single aio_dispatch() call. To do this, we need to
+ * reorganize aio_poll into a prepare/poll/dispatch model like
+ * glib's.
+ *
+ * If we're in a nested event loop, ctx->dispatching might be true.
+ * In that case we can restore it just before returning, but we
+ * have to clear it now.
+ */
+ aio_set_dispatching(ctx, !blocking);
+
/*
* If there are callbacks left that have been queued, we need to call them.
* Do not call select in this case, because it is possible that the caller
- * does not need a complete flush (as is the case for qemu_aio_wait loops).
+ * does not need a complete flush (as is the case for aio_poll loops).
*/
if (aio_bh_poll(ctx)) {
blocking = false;
progress = true;
}
+ /* Re-evaluate condition (1) above. */
+ aio_set_dispatching(ctx, !blocking);
if (aio_dispatch(ctx)) {
progress = true;
}
if (progress && !blocking) {
- return true;
+ goto out;
}
ctx->walking_handlers++;
}
/* Run dispatch even if there were no readable fds to run timers */
+ aio_set_dispatching(ctx, true);
if (aio_dispatch(ctx)) {
progress = true;
}
+out:
+ aio_set_dispatching(ctx, was_dispatching);
return progress;
}
/*
* If there are callbacks left that have been queued, we need to call then.
* Do not call select in this case, because it is possible that the caller
- * does not need a complete flush (as is the case for qemu_aio_wait loops).
+ * does not need a complete flush (as is the case for aio_poll loops).
*/
if (aio_bh_poll(ctx)) {
blocking = false;
/*
* Then dispatch any pending callbacks from the GSource.
*
- * We have to walk very carefully in case qemu_aio_set_fd_handler is
+ * We have to walk very carefully in case aio_set_fd_handler is
* called while we're walking.
*/
node = QLIST_FIRST(&ctx->aio_handlers);
blocking = false;
/* we have to walk very carefully in case
- * qemu_aio_set_fd_handler is called while we're walking */
+ * aio_set_fd_handler is called while we're walking */
node = QLIST_FIRST(&ctx->aio_handlers);
while (node) {
AioHandler *tmp;
#include "block/aio.h"
#include "block/thread-pool.h"
#include "qemu/main-loop.h"
+#include "qemu/atomic.h"
/***********************************************************/
/* bottom halves (can be seen as timers which expire ASAP) */
return ctx->thread_pool;
}
+void aio_set_dispatching(AioContext *ctx, bool dispatching)
+{
+ ctx->dispatching = dispatching;
+ if (!dispatching) {
+ /* Write ctx->dispatching before reading e.g. bh->scheduled.
+ * Optimization: this is only needed when we're entering the "unsafe"
+ * phase where other threads must call event_notifier_set.
+ */
+ smp_mb();
+ }
+}
+
void aio_notify(AioContext *ctx)
{
- event_notifier_set(&ctx->notifier);
+ /* Write e.g. bh->scheduled before reading ctx->dispatching. */
+ smp_mb();
+ if (!ctx->dispatching) {
+ event_notifier_set(&ctx->notifier);
+ }
}
static void aio_timerlist_notify(void *opaque)
co = qemu_coroutine_create(bdrv_create_co_entry);
qemu_coroutine_enter(co, &cco);
while (cco.ret == NOT_DONE) {
- qemu_aio_wait();
+ aio_poll(qemu_get_aio_context(), true);
}
}
assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+ assert(!qiov || bytes == qiov->size);
/* Handle Copy on Read and associated serialisation */
if (flags & BDRV_REQ_COPY_ON_READ) {
max_nb_sectors = ROUND_UP(MAX(0, total_sectors - sector_num),
align >> BDRV_SECTOR_BITS);
if (max_nb_sectors > 0) {
- ret = drv->bdrv_co_readv(bs, sector_num,
- MIN(nb_sectors, max_nb_sectors), qiov);
+ QEMUIOVector local_qiov;
+ size_t local_sectors;
+
+ max_nb_sectors = MIN(max_nb_sectors, SIZE_MAX / BDRV_SECTOR_BITS);
+ local_sectors = MIN(max_nb_sectors, nb_sectors);
+
+ qemu_iovec_init(&local_qiov, qiov->niov);
+ qemu_iovec_concat(&local_qiov, qiov, 0,
+ local_sectors * BDRV_SECTOR_SIZE);
+
+ ret = drv->bdrv_co_readv(bs, sector_num, local_sectors,
+ &local_qiov);
+
+ qemu_iovec_destroy(&local_qiov);
} else {
ret = 0;
}
assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+ assert(!qiov || bytes == qiov->size);
waited = wait_serialising_requests(req);
assert(!waited || !req->serialising);
if (ret < 0) {
return ret;
}
- return (ret & BDRV_BLOCK_ALLOCATED);
+ return !!(ret & BDRV_BLOCK_ALLOCATED);
}
/*
BACKUP_SECTORS_PER_CLUSTER - i, &n);
i += n;
- if (alloced == 1) {
+ if (alloced == 1 || n == 0) {
break;
}
}
n1 = qcow2_backing_read1(bs->backing_hd, &hd_qiov,
sector_num, cur_nr_sectors);
if (n1 > 0) {
+ QEMUIOVector local_qiov;
+
+ qemu_iovec_init(&local_qiov, hd_qiov.niov);
+ qemu_iovec_concat(&local_qiov, &hd_qiov, 0,
+ n1 * BDRV_SECTOR_SIZE);
+
BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO);
qemu_co_mutex_unlock(&s->lock);
ret = bdrv_co_readv(bs->backing_hd, sector_num,
- n1, &hd_qiov);
+ n1, &local_qiov);
qemu_co_mutex_lock(&s->lock);
+
+ qemu_iovec_destroy(&local_qiov);
+
if (ret < 0) {
goto fail;
}
/**
* Read from the backing file or zero-fill if no backing file
*
- * @s: QED state
- * @pos: Byte position in device
- * @qiov: Destination I/O vector
- * @cb: Completion function
- * @opaque: User data for completion function
+ * @s: QED state
+ * @pos: Byte position in device
+ * @qiov: Destination I/O vector
+ * @backing_qiov: Possibly shortened copy of qiov, to be allocated here
+ * @cb: Completion function
+ * @opaque: User data for completion function
*
* This function reads qiov->size bytes starting at pos from the backing file.
* If there is no backing file then zeroes are read.
*/
static void qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
QEMUIOVector *qiov,
+ QEMUIOVector **backing_qiov,
BlockDriverCompletionFunc *cb, void *opaque)
{
uint64_t backing_length = 0;
/* If the read straddles the end of the backing file, shorten it */
size = MIN((uint64_t)backing_length - pos, qiov->size);
+ assert(*backing_qiov == NULL);
+ *backing_qiov = g_new(QEMUIOVector, 1);
+ qemu_iovec_init(*backing_qiov, qiov->niov);
+ qemu_iovec_concat(*backing_qiov, qiov, 0, size);
+
BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING_AIO);
bdrv_aio_readv(s->bs->backing_hd, pos / BDRV_SECTOR_SIZE,
- qiov, size / BDRV_SECTOR_SIZE, cb, opaque);
+ *backing_qiov, size / BDRV_SECTOR_SIZE, cb, opaque);
}
typedef struct {
GenericCB gencb;
BDRVQEDState *s;
QEMUIOVector qiov;
+ QEMUIOVector *backing_qiov;
struct iovec iov;
uint64_t offset;
} CopyFromBackingFileCB;
CopyFromBackingFileCB *copy_cb = opaque;
BDRVQEDState *s = copy_cb->s;
+ if (copy_cb->backing_qiov) {
+ qemu_iovec_destroy(copy_cb->backing_qiov);
+ g_free(copy_cb->backing_qiov);
+ copy_cb->backing_qiov = NULL;
+ }
+
if (ret) {
qed_copy_from_backing_file_cb(copy_cb, ret);
return;
copy_cb = gencb_alloc(sizeof(*copy_cb), cb, opaque);
copy_cb->s = s;
copy_cb->offset = offset;
+ copy_cb->backing_qiov = NULL;
copy_cb->iov.iov_base = qemu_blockalign(s->bs, len);
copy_cb->iov.iov_len = len;
qemu_iovec_init_external(©_cb->qiov, ©_cb->iov, 1);
- qed_read_backing_file(s, pos, ©_cb->qiov,
+ qed_read_backing_file(s, pos, ©_cb->qiov, ©_cb->backing_qiov,
qed_copy_from_backing_file_write, copy_cb);
}
return;
} else if (ret != QED_CLUSTER_FOUND) {
qed_read_backing_file(s, acb->cur_pos, &acb->cur_qiov,
- qed_aio_next_io, acb);
+ &acb->backing_qiov, qed_aio_next_io, acb);
return;
}
trace_qed_aio_next_io(s, acb, ret, acb->cur_pos + acb->cur_qiov.size);
+ if (acb->backing_qiov) {
+ qemu_iovec_destroy(acb->backing_qiov);
+ g_free(acb->backing_qiov);
+ acb->backing_qiov = NULL;
+ }
+
/* Handle I/O error */
if (ret) {
qed_aio_complete(acb, ret);
acb->qiov_offset = 0;
acb->cur_pos = (uint64_t)sector_num * BDRV_SECTOR_SIZE;
acb->end_pos = acb->cur_pos + nb_sectors * BDRV_SECTOR_SIZE;
+ acb->backing_qiov = NULL;
acb->request.l2_table = NULL;
qemu_iovec_init(&acb->cur_qiov, qiov->niov);
/* Current cluster scatter-gather list */
QEMUIOVector cur_qiov;
+ QEMUIOVector *backing_qiov;
uint64_t cur_pos; /* position on block device, in bytes */
uint64_t cur_cluster; /* cluster offset in image file */
unsigned int cur_nclusters; /* number of clusters being accessed */
memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len);
p += aiocb->aio_iov[i].iov_len;
}
+ assert(p - buf == aiocb->aio_nbytes);
}
nbytes = handle_aiocb_rw_linear(aiocb, buf);
copy = aiocb->aio_iov[i].iov_len;
}
memcpy(aiocb->aio_iov[i].iov_base, p, copy);
+ assert(count >= copy);
p += copy;
count -= copy;
}
+ assert(count == 0);
}
qemu_vfree(buf);
acb->aio_type = type;
acb->aio_fildes = fd;
+ acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE;
+ acb->aio_offset = sector_num * BDRV_SECTOR_SIZE;
+
if (qiov) {
acb->aio_iov = qiov->iov;
acb->aio_niov = qiov->niov;
+ assert(qiov->size == acb->aio_nbytes);
}
- acb->aio_nbytes = nb_sectors * 512;
- acb->aio_offset = sector_num * 512;
trace_paio_submit_co(sector_num, nb_sectors, type);
pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
acb->aio_type = type;
acb->aio_fildes = fd;
+ acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE;
+ acb->aio_offset = sector_num * BDRV_SECTOR_SIZE;
+
if (qiov) {
acb->aio_iov = qiov->iov;
acb->aio_niov = qiov->niov;
+ assert(qiov->size == acb->aio_nbytes);
}
- acb->aio_nbytes = nb_sectors * 512;
- acb->aio_offset = sector_num * 512;
trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
job->opaque = &data;
block_job_cancel(job);
while (data.ret == -EINPROGRESS) {
- qemu_aio_wait();
+ aio_poll(bdrv_get_aio_context(bs), true);
}
return (data.cancelled && data.ret == 0) ? -ECANCELED : data.ret;
}
return;
}
+ if (dbs->iov.size & ~BDRV_SECTOR_MASK) {
+ qemu_iovec_discard_back(&dbs->iov, dbs->iov.size & ~BDRV_SECTOR_MASK);
+ }
+
dbs->acb = dbs->io_func(dbs->bs, dbs->sector_num, &dbs->iov,
dbs->iov.size / 512, dma_bdrv_cb, dbs);
assert(dbs->acb);
--- /dev/null
+/*
+ * This model describes the interaction between aio_set_dispatching()
+ * and aio_notify().
+ *
+ * Author: Paolo Bonzini <pbonzini@redhat.com>
+ *
+ * This file is in the public domain. If you really want a license,
+ * the WTFPL will do.
+ *
+ * To simulate it:
+ * spin -p docs/aio_notify.promela
+ *
+ * To verify it:
+ * spin -a docs/aio_notify.promela
+ * gcc -O2 pan.c
+ * ./a.out -a
+ */
+
+#define MAX 4
+#define LAST (1 << (MAX - 1))
+#define FINAL ((LAST << 1) - 1)
+
+bool dispatching;
+bool event;
+
+int req, done;
+
+active proctype waiter()
+{
+ int fetch, blocking;
+
+ do
+ :: done != FINAL -> {
+ // Computing "blocking" is separate from execution of the
+ // "bottom half"
+ blocking = (req == 0);
+
+ // This is our "bottom half"
+ atomic { fetch = req; req = 0; }
+ done = done | fetch;
+
+ // Wait for a nudge from the other side
+ do
+ :: event == 1 -> { event = 0; break; }
+ :: !blocking -> break;
+ od;
+
+ dispatching = 1;
+
+ // If you are simulating this model, you may want to add
+ // something like this here:
+ //
+ // int foo; foo++; foo++; foo++;
+ //
+ // This only wastes some time and makes it more likely
+ // that the notifier process hits the "fast path".
+
+ dispatching = 0;
+ }
+ :: else -> break;
+ od
+}
+
+active proctype notifier()
+{
+ int next = 1;
+ int sets = 0;
+
+ do
+ :: next <= LAST -> {
+ // generate a request
+ req = req | next;
+ next = next << 1;
+
+ // aio_notify
+ if
+ :: dispatching == 0 -> sets++; event = 1;
+ :: else -> skip;
+ fi;
+
+ // Test both synchronous and asynchronous delivery
+ if
+ :: 1 -> do
+ :: req == 0 -> break;
+ od;
+ :: 1 -> skip;
+ fi;
+ }
+ :: else -> break;
+ od;
+ printf("Skipped %d event_notifier_set\n", MAX - sets);
+}
+
+#define p (done == FINAL)
+
+never {
+ do
+ :: 1 // after an arbitrarily long prefix
+ :: p -> break // p becomes true
+ od;
+ do
+ :: !p -> accept: break // it then must remains true forever after
+ od
+}
{
stb_p(&req->in->status, status);
- vring_push(&req->dev->dataplane->vring, req->elem,
+ vring_push(&req->dev->dataplane->vring, &req->elem,
req->qiov.size + sizeof(*req->in));
notify_guest(req->dev->dataplane);
- g_slice_free(VirtIOBlockReq, req);
}
static void handle_notify(EventNotifier *e)
{
VirtIOBlockDataPlane *s = container_of(e, VirtIOBlockDataPlane,
host_notifier);
-
- VirtQueueElement *elem;
- VirtIOBlockReq *req;
- int ret;
- MultiReqBuffer mrb = {
- .num_writes = 0,
- };
+ VirtIOBlock *vblk = VIRTIO_BLK(s->vdev);
event_notifier_test_and_clear(&s->host_notifier);
bdrv_io_plug(s->blk->conf.bs);
for (;;) {
+ MultiReqBuffer mrb = {
+ .num_writes = 0,
+ };
+ int ret;
+
/* Disable guest->host notifies to avoid unnecessary vmexits */
vring_disable_notification(s->vdev, &s->vring);
for (;;) {
- ret = vring_pop(s->vdev, &s->vring, &elem);
+ VirtIOBlockReq *req = virtio_blk_alloc_request(vblk);
+
+ ret = vring_pop(s->vdev, &s->vring, &req->elem);
if (ret < 0) {
- assert(elem == NULL);
+ virtio_blk_free_request(req);
break; /* no more requests */
}
- trace_virtio_blk_data_plane_process_request(s, elem->out_num,
- elem->in_num, elem->index);
+ trace_virtio_blk_data_plane_process_request(s, req->elem.out_num,
+ req->elem.in_num,
+ req->elem.index);
- req = g_slice_new(VirtIOBlockReq);
- req->dev = VIRTIO_BLK(s->vdev);
- req->elem = elem;
virtio_blk_handle_request(req, &mrb);
}
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"
-static VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s)
+VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s)
{
- VirtIOBlockReq *req = g_slice_new0(VirtIOBlockReq);
+ VirtIOBlockReq *req = g_slice_new(VirtIOBlockReq);
req->dev = s;
- req->elem = g_slice_new0(VirtQueueElement);
+ req->qiov.size = 0;
+ req->next = NULL;
return req;
}
-static void virtio_blk_free_request(VirtIOBlockReq *req)
+void virtio_blk_free_request(VirtIOBlockReq *req)
{
if (req) {
- g_slice_free(VirtQueueElement, req->elem);
g_slice_free(VirtIOBlockReq, req);
}
}
trace_virtio_blk_req_complete(req, status);
stb_p(&req->in->status, status);
- virtqueue_push(s->vq, req->elem, req->qiov.size + sizeof(*req->in));
+ virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in));
virtio_notify(vdev, s->vq);
}
{
VirtIOBlockReq *req = virtio_blk_alloc_request(s);
- if (!virtqueue_pop(s->vq, req->elem)) {
+ if (!virtqueue_pop(s->vq, &req->elem)) {
virtio_blk_free_request(req);
return NULL;
}
{
int status;
- status = virtio_blk_handle_scsi_req(req->dev, req->elem);
+ status = virtio_blk_handle_scsi_req(req->dev, &req->elem);
virtio_blk_req_complete(req, status);
virtio_blk_free_request(req);
}
bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req);
}
+static bool virtio_blk_sect_range_ok(VirtIOBlock *dev,
+ uint64_t sector, size_t size)
+{
+ uint64_t nb_sectors = size >> BDRV_SECTOR_BITS;
+ uint64_t total_sectors;
+
+ if (sector & dev->sector_mask) {
+ return false;
+ }
+ if (size % dev->conf->logical_block_size) {
+ return false;
+ }
+ bdrv_get_geometry(dev->bs, &total_sectors);
+ if (sector > total_sectors || nb_sectors > total_sectors - sector) {
+ return false;
+ }
+ return true;
+}
+
static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb)
{
BlockRequest *blkreq;
sector = virtio_ldq_p(VIRTIO_DEVICE(req->dev), &req->out.sector);
- bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE);
-
trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512);
- if (sector & req->dev->sector_mask) {
- virtio_blk_rw_complete(req, -EIO);
- return;
- }
- if (req->qiov.size % req->dev->conf->logical_block_size) {
- virtio_blk_rw_complete(req, -EIO);
+ if (!virtio_blk_sect_range_ok(req->dev, sector, req->qiov.size)) {
+ virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
+ virtio_blk_free_request(req);
return;
}
+ bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE);
+
if (mrb->num_writes == 32) {
virtio_submit_multiwrite(req->dev->bs, mrb);
}
sector = virtio_ldq_p(VIRTIO_DEVICE(req->dev), &req->out.sector);
- bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ);
-
trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512);
- if (sector & req->dev->sector_mask) {
- virtio_blk_rw_complete(req, -EIO);
- return;
- }
- if (req->qiov.size % req->dev->conf->logical_block_size) {
- virtio_blk_rw_complete(req, -EIO);
+ if (!virtio_blk_sect_range_ok(req->dev, sector, req->qiov.size)) {
+ virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
+ virtio_blk_free_request(req);
return;
}
+
+ bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ);
bdrv_aio_readv(req->dev->bs, sector, &req->qiov,
req->qiov.size / BDRV_SECTOR_SIZE,
virtio_blk_rw_complete, req);
void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb)
{
uint32_t type;
- struct iovec *in_iov = req->elem->in_sg;
- struct iovec *iov = req->elem->out_sg;
- unsigned in_num = req->elem->in_num;
- unsigned out_num = req->elem->out_num;
+ struct iovec *in_iov = req->elem.in_sg;
+ struct iovec *iov = req->elem.out_sg;
+ unsigned in_num = req->elem.in_num;
+ unsigned out_num = req->elem.out_num;
- if (req->elem->out_num < 1 || req->elem->in_num < 1) {
+ if (req->elem.out_num < 1 || req->elem.in_num < 1) {
error_report("virtio-blk missing headers");
exit(1);
}
* NB: per existing s/n string convention the string is
* terminated by '\0' only when shorter than buffer.
*/
- strncpy(req->elem->in_sg[0].iov_base,
+ strncpy(req->elem.in_sg[0].iov_base,
s->blk.serial ? s->blk.serial : "",
- MIN(req->elem->in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES));
+ MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES));
virtio_blk_req_complete(req, VIRTIO_BLK_S_OK);
virtio_blk_free_request(req);
} else if (type & VIRTIO_BLK_T_OUT) {
- qemu_iovec_init_external(&req->qiov, &req->elem->out_sg[1],
- req->elem->out_num - 1);
+ qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1],
+ req->elem.out_num - 1);
virtio_blk_handle_write(req, mrb);
} else if (type == VIRTIO_BLK_T_IN || type == VIRTIO_BLK_T_BARRIER) {
/* VIRTIO_BLK_T_IN is 0, so we can't just & it. */
- qemu_iovec_init_external(&req->qiov, &req->elem->in_sg[0],
- req->elem->in_num - 1);
+ qemu_iovec_init_external(&req->qiov, &req->elem.in_sg[0],
+ req->elem.in_num - 1);
virtio_blk_handle_read(req);
} else {
virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP);
while (req) {
qemu_put_sbyte(f, 1);
- qemu_put_buffer(f, (unsigned char *)req->elem,
+ qemu_put_buffer(f, (unsigned char *)&req->elem,
sizeof(VirtQueueElement));
req = req->next;
}
while (qemu_get_sbyte(f)) {
VirtIOBlockReq *req = virtio_blk_alloc_request(s);
- qemu_get_buffer(f, (unsigned char *)req->elem,
+ qemu_get_buffer(f, (unsigned char *)&req->elem,
sizeof(VirtQueueElement));
req->next = s->rq;
s->rq = req;
- virtqueue_map_sg(req->elem->in_sg, req->elem->in_addr,
- req->elem->in_num, 1);
- virtqueue_map_sg(req->elem->out_sg, req->elem->out_addr,
- req->elem->out_num, 0);
+ virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr,
+ req->elem.in_num, 1);
+ virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr,
+ req->elem.out_num, 0);
}
return 0;
ide_set_irq(s->bus);
}
+static bool ide_sect_range_ok(IDEState *s,
+ uint64_t sector, uint64_t nb_sectors)
+{
+ uint64_t total_sectors;
+
+ bdrv_get_geometry(s->bs, &total_sectors);
+ if (sector > total_sectors || nb_sectors > total_sectors - sector) {
+ return false;
+ }
+ return true;
+}
+
static void ide_sector_read_cb(void *opaque, int ret)
{
IDEState *s = opaque;
printf("sector=%" PRId64 "\n", sector_num);
#endif
+ if (!ide_sect_range_ok(s, sector_num, n)) {
+ ide_rw_error(s);
+ return;
+ }
+
s->iov.iov_base = s->io_buffer;
s->iov.iov_len = n * BDRV_SECTOR_SIZE;
qemu_iovec_init_external(&s->qiov, &s->iov, 1);
sector_num, n, s->dma_cmd);
#endif
+ if (!ide_sect_range_ok(s, sector_num, n)) {
+ dma_buf_commit(s);
+ ide_dma_error(s);
+ return;
+ }
+
switch (s->dma_cmd) {
case IDE_DMA_READ:
s->bus->dma->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num,
n = s->req_nb_sectors;
}
+ if (!ide_sect_range_ok(s, sector_num, n)) {
+ ide_rw_error(s);
+ return;
+ }
+
s->iov.iov_base = s->io_buffer;
s->iov.iov_len = n * BDRV_SECTOR_SIZE;
qemu_iovec_init_external(&s->qiov, &s->iov, 1);
return 0;
}
-void vring_free_element(VirtQueueElement *elem)
+static void vring_unmap_element(VirtQueueElement *elem)
{
int i;
for (i = 0; i < elem->in_num; i++) {
vring_unmap(elem->in_sg[i].iov_base, true);
}
-
- g_slice_free(VirtQueueElement, elem);
}
/* This looks in the virtqueue and for the first available buffer, and converts
* Stolen from linux/drivers/vhost/vhost.c.
*/
int vring_pop(VirtIODevice *vdev, Vring *vring,
- VirtQueueElement **p_elem)
+ VirtQueueElement *elem)
{
struct vring_desc desc;
unsigned int i, head, found = 0, num = vring->vr.num;
uint16_t avail_idx, last_avail_idx;
- VirtQueueElement *elem = NULL;
int ret;
+ /* Initialize elem so it can be safely unmapped */
+ elem->in_num = elem->out_num = 0;
+
/* If there was a fatal error then refuse operation */
if (vring->broken) {
ret = -EFAULT;
* the index we've seen. */
head = vring->vr.avail->ring[last_avail_idx % num];
- elem = g_slice_new(VirtQueueElement);
elem->index = head;
- elem->in_num = elem->out_num = 0;
-
+
/* If their number is silly, that's an error. */
if (unlikely(head >= num)) {
error_report("Guest says index %u > %u is available", head, num);
/* On success, increment avail index. */
vring->last_avail_idx++;
- *p_elem = elem;
return head;
out:
if (ret == -EFAULT) {
vring->broken = true;
}
- if (elem) {
- vring_free_element(elem);
- }
- *p_elem = NULL;
+ vring_unmap_element(elem);
return ret;
}
unsigned int head = elem->index;
uint16_t new;
- vring_free_element(elem);
+ vring_unmap_element(elem);
/* Don't touch vring if a fatal error occurred */
if (vring->broken) {
*/
int walking_handlers;
+ /* Used to avoid unnecessary event_notifier_set calls in aio_notify.
+ * Writes protected by lock or BQL, reads are lockless.
+ */
+ bool dispatching;
+
/* lock to protect between bh's adders and deleter */
QemuMutex bh_lock;
+
/* Anchor of the list of Bottom Halves belonging to the context */
struct QEMUBH *first_bh;
QEMUTimerListGroup tlg;
};
+/* Used internally to synchronize aio_poll against qemu_bh_schedule. */
+void aio_set_dispatching(AioContext *ctx, bool dispatching);
+
/**
* aio_context_new: Allocate a new AioContext.
*
/* Progress in completing AIO work to occur. This can issue new pending
* aio as a result of executing I/O completion or bh callbacks.
*
- * If there is no pending AIO operation or completion (bottom half),
- * return false. If there are pending AIO operations of bottom halves,
- * return true.
+ * Return whether any progress was made by executing AIO or bottom half
+ * handlers. If @blocking == true, this should always be true except
+ * if someone called aio_notify.
*
* If there are no pending bottom halves, but there are pending AIO
* operations, it may not be possible to make any progress without
#ifdef CONFIG_POSIX
/* Register a file descriptor and associated callbacks. Behaves very similarly
* to qemu_set_fd_handler2. Unlike qemu_set_fd_handler2, these callbacks will
- * be invoked when using qemu_aio_wait().
+ * be invoked when using aio_poll().
*
* Code that invokes AIO completion functions should rely on this function
* instead of qemu_set_fd_handler[2].
/* Register an event notifier and associated callbacks. Behaves very similarly
* to event_notifier_set_handler. Unlike event_notifier_set_handler, these callbacks
- * will be invoked when using qemu_aio_wait().
+ * will be invoked when using aio_poll().
*
* Code that invokes AIO completion functions should rely on this function
* instead of event_notifier_set_handler.
/* Return the ThreadPool bound to this AioContext */
struct ThreadPool *aio_get_thread_pool(AioContext *ctx);
-/* Functions to operate on the main QEMU AioContext. */
-
-bool qemu_aio_wait(void);
-void qemu_aio_set_event_notifier(EventNotifier *notifier,
- EventNotifierHandler *io_read);
-
-#ifdef CONFIG_POSIX
-void qemu_aio_set_fd_handler(int fd,
- IOHandler *io_read,
- IOHandler *io_write,
- void *opaque);
-#endif
-
/**
* aio_timer_new:
* @ctx: the aio context
* Set to true if the job should cancel itself. The flag must
* always be tested just before toggling the busy flag from false
* to true. After a job has been cancelled, it should only yield
- * if #qemu_aio_wait will ("sooner or later") reenter the coroutine.
+ * if #aio_poll will ("sooner or later") reenter the coroutine.
*/
bool cancelled;
/**
* Set to false by the job while it is in a quiescent state, where
* no I/O is pending and the job has yielded on any condition
- * that is not detected by #qemu_aio_wait, such as a timer.
+ * that is not detected by #aio_poll, such as a timer.
*/
bool busy;
* Yield the coroutine for a given duration
*
* Behaves similarly to co_sleep_ns(), but the sleeping coroutine will be
- * resumed when using qemu_aio_wait().
+ * resumed when using aio_poll().
*/
void coroutine_fn co_aio_sleep_ns(AioContext *ctx, QEMUClockType type,
int64_t ns);
void vring_disable_notification(VirtIODevice *vdev, Vring *vring);
bool vring_enable_notification(VirtIODevice *vdev, Vring *vring);
bool vring_should_notify(VirtIODevice *vdev, Vring *vring);
-int vring_pop(VirtIODevice *vdev, Vring *vring, VirtQueueElement **elem);
+int vring_pop(VirtIODevice *vdev, Vring *vring, VirtQueueElement *elem);
void vring_push(Vring *vring, VirtQueueElement *elem, int len);
-void vring_free_element(VirtQueueElement *elem);
#endif /* VRING_H */
typedef struct VirtIOBlockReq {
VirtIOBlock *dev;
- VirtQueueElement *elem;
+ VirtQueueElement elem;
struct virtio_blk_inhdr *in;
struct virtio_blk_outhdr out;
QEMUIOVector qiov;
BlockAcctCookie acct;
} VirtIOBlockReq;
+VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s);
+
+void virtio_blk_free_request(VirtIOBlockReq *req);
+
int virtio_blk_handle_scsi_req(VirtIOBlock *blk,
VirtQueueElement *elem);
int fillc, size_t bytes);
ssize_t qemu_iovec_compare(QEMUIOVector *a, QEMUIOVector *b);
void qemu_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, void *buf);
+void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes);
bool buffer_is_zero(const void *buf, size_t len);
static void *iothread_run(void *opaque)
{
IOThread *iothread = opaque;
+ bool blocking;
qemu_mutex_lock(&iothread->init_done_lock);
iothread->thread_id = qemu_get_thread_id();
while (!iothread->stopping) {
aio_context_acquire(iothread->ctx);
- while (!iothread->stopping && aio_poll(iothread->ctx, true)) {
+ blocking = true;
+ while (!iothread->stopping && aio_poll(iothread->ctx, blocking)) {
/* Progress was made, keep going */
+ blocking = false;
}
aio_context_release(iothread->ctx);
}
{
return aio_bh_new(qemu_aio_context, cb, opaque);
}
-
-bool qemu_aio_wait(void)
-{
- return aio_poll(qemu_aio_context, true);
-}
-
-#ifdef CONFIG_POSIX
-void qemu_aio_set_fd_handler(int fd,
- IOHandler *io_read,
- IOHandler *io_write,
- void *opaque)
-{
- aio_set_fd_handler(qemu_aio_context, fd, io_read, io_write, opaque);
-}
-#endif
-
-void qemu_aio_set_event_notifier(EventNotifier *notifier,
- EventNotifierHandler *io_read)
-{
- aio_set_event_notifier(qemu_aio_context, notifier, io_read);
-}
co = qemu_coroutine_create(co_write_zeroes_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
- qemu_aio_wait();
+ aio_poll(bdrv_get_aio_context(bs), true);
}
if (data.ret < 0) {
return data.ret;
static int wait_break_f(BlockDriverState *bs, int argc, char **argv)
{
while (!bdrv_debug_is_suspended(bs, argv[1])) {
- qemu_aio_wait();
+ aio_poll(bdrv_get_aio_context(bs), true);
}
return 0;
_cleanup()
{
- _cleanup_test_img
+ rm -f "${TEST_IMG}.copy"
+ _cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
. ./common.rc
. ./common.filter
. ./common.pattern
+. ./common.qemu
# Any format supporting backing files except vmdk and qcow which do not support
# smaller backing files.
# Rebase it on top of its base image
$QEMU_IMG rebase -b "$TEST_IMG.base" "$TEST_IMG"
+echo
+echo block-backup
+echo
+
+qemu_comm_method="monitor"
+_launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},id=disk
+h=$QEMU_HANDLE
+QEMU_COMM_TIMEOUT=1
+
+_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
+qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
+_send_qemu_cmd $h 'quit' ""
+
+# Base image sectors
+TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32
+
+# Image sectors
+TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64
+
+# Zero sectors beyond end of base image
+TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
+
+
_check_test_img
# success, all done
read 512/512 bytes at offset 3221258752
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
+
+block-backup
+
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) d\e[K\e[Ddr\e[K\e[D\e[Ddri\e[K\e[D\e[D\e[Ddriv\e[K\e[D\e[D\e[D\e[Ddrive\e[K\e[D\e[D\e[D\e[D\e[Ddrive_\e[K\e[D\e[D\e[D\e[D\e[D\e[Ddrive_b\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_ba\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_bac\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_back\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backu\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup \e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup d\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup di\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup dis\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk \e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /h\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /ho\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /hom\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /home\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /home/\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /home/k\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk /home/kw\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk 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TEST_DIR/t.qcow2.cop\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Ddrive_backup disk TEST_DIR/t.qcow2.copy\e[K
+Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=4294968832 backing_file='TEST_DIR/t.qcow2.base' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
+(qemu) i\e[K\e[Din\e[K\e[D\e[Dinf\e[K\e[D\e[D\e[Dinfo\e[K\e[D\e[D\e[D\e[Dinfo \e[K\e[D\e[D\e[D\e[D\e[Dinfo b\e[K\e[D\e[D\e[D\e[D\e[D\e[Dinfo bl\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo blo\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo bloc\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-j\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-jo\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-job\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-jobs\e[K
+Type backup, device disk: Completed 0 of 4294968832 bytes, speed limit 0 bytes/s
+i\e[K\e[Din\e[K\e[D\e[Dinf\e[K\e[D\e[D\e[Dinfo\e[K\e[D\e[D\e[D\e[Dinfo \e[K\e[D\e[D\e[D\e[D\e[Dinfo b\e[K\e[D\e[D\e[D\e[D\e[D\e[Dinfo bl\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo blo\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo bloc\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-j\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-jo\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-job\e[K\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[D\e[Dinfo block-jobs\e[K
+No active jobs
+=== IO: pattern 195
+read 512/512 bytes at offset 3221194240
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221195264
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221196288
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221197312
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221198336
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221199360
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221200384
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221201408
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221202432
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221203456
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221204480
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221205504
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221206528
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221207552
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221208576
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221209600
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221210624
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221211648
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221212672
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221213696
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221214720
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221215744
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221216768
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221217792
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221218816
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221219840
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221220864
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221221888
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221222912
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221223936
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221224960
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221225984
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+=== IO: pattern 196
+read 512/512 bytes at offset 3221194752
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221195776
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221196800
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221197824
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221198848
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221199872
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221200896
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221201920
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221202944
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221203968
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221204992
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221206016
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221207040
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221208064
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221209088
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221210112
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221211136
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221212160
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221213184
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221214208
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221215232
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221216256
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221217280
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221218304
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221219328
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221220352
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221221376
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221222400
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221223424
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221224448
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221225472
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221226496
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221227520
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221228544
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221229568
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221230592
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221231616
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221232640
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221233664
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221234688
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221235712
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221236736
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221237760
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221238784
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221239808
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221240832
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221241856
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221242880
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221243904
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221244928
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221245952
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221246976
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221248000
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221249024
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221250048
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221251072
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221252096
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221253120
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221254144
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221255168
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221256192
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221257216
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221258240
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221259264
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+=== IO: pattern 0
+read 512/512 bytes at offset 3221227008
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221228032
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221229056
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221230080
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221231104
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221232128
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221233152
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221234176
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221235200
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221236224
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221237248
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221238272
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221239296
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221240320
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221241344
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221242368
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221243392
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221244416
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221245440
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221246464
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221247488
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221248512
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221249536
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221250560
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221251584
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221252608
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221253632
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221254656
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221255680
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221256704
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221257728
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 3221258752
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
*** done
bool auto_set;
} EventNotifierTestData;
-/* Wait until there are no more BHs or AIO requests */
-static void wait_for_aio(void)
-{
- while (aio_poll(ctx, true)) {
- /* Do nothing */
- }
-}
-
/* Wait until event notifier becomes inactive */
static void wait_until_inactive(EventNotifierTestData *data)
{
g_assert(aio_poll(ctx, true));
g_assert_cmpint(data.n, ==, 2);
- wait_for_aio();
+ while (data.n < 10) {
+ aio_poll(ctx, true);
+ }
g_assert_cmpint(data.n, ==, 10);
g_assert(!aio_poll(ctx, false));
qemu_bh_schedule(data1.bh);
g_assert_cmpint(data1.n, ==, 0);
- wait_for_aio();
+ while (data1.n < data1.max) {
+ aio_poll(ctx, true);
+ }
g_assert_cmpint(data1.n, ==, data1.max);
g_assert(data1.bh == NULL);
g_assert_cmpint(data4.n, ==, 1);
g_assert(data1.bh == NULL);
- wait_for_aio();
+ while (data1.n < data1.max ||
+ data2.n < data2.max ||
+ data3.n < data3.max ||
+ data4.n < data4.max) {
+ aio_poll(ctx, true);
+ }
g_assert_cmpint(data1.n, ==, data1.max);
g_assert_cmpint(data2.n, ==, data2.max);
g_assert_cmpint(data3.n, ==, data3.max);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
- wait_for_aio();
+ g_assert(aio_poll(ctx, true));
g_assert_cmpint(data.n, ==, 1);
g_assert(!aio_poll(ctx, false));
g_usleep(1 * G_USEC_PER_SEC);
g_assert_cmpint(data.n, ==, 0);
- g_assert(g_main_context_iteration(NULL, false));
+ g_assert(g_main_context_iteration(NULL, true));
g_assert_cmpint(data.n, ==, 1);
+ expiry += data.ns;
- /* The comment above was not kidding when it said this wakes up itself */
- do {
- g_assert(g_main_context_iteration(NULL, true));
- } while (qemu_clock_get_ns(data.clock_type) <= expiry);
- g_usleep(1 * G_USEC_PER_SEC);
- g_main_context_iteration(NULL, false);
+ while (data.n < 2) {
+ g_main_context_iteration(NULL, true);
+ }
g_assert_cmpint(data.n, ==, 2);
+ g_assert(qemu_clock_get_ns(data.clock_type) > expiry);
aio_set_fd_handler(ctx, pipefd[0], NULL, NULL, NULL);
close(pipefd[0]);
data->ret = 0;
active--;
- /* The test continues in test_submit_co, after qemu_aio_wait_all... */
+ /* The test continues in test_submit_co, after aio_poll... */
}
static void test_submit_co(void)
g_assert_cmpint(active, ==, 1);
g_assert_cmpint(data.ret, ==, -EINPROGRESS);
- /* qemu_aio_wait_all will execute the rest of the coroutine. */
+ /* aio_poll will execute the rest of the coroutine. */
while (data.ret == -EINPROGRESS) {
aio_poll(ctx, true);
return total;
}
+
+void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes)
+{
+ size_t total;
+ unsigned int niov = qiov->niov;
+
+ assert(qiov->size >= bytes);
+ total = iov_discard_back(qiov->iov, &niov, bytes);
+ assert(total == bytes);
+
+ qiov->niov = niov;
+ qiov->size -= bytes;
+}
projects / mirror_qemu.git / commitdiff