#include "trace.h"
#include "qapi/error.h"
#include "block/block-copy.h"
+#include "block/block_int-io.h"
+#include "block/dirty-bitmap.h"
#include "block/reqlist.h"
#include "sysemu/block-backend.h"
#include "qemu/units.h"
+#include "qemu/co-shared-resource.h"
#include "qemu/coroutine.h"
+#include "qemu/ratelimit.h"
#include "block/aio_task.h"
#include "qemu/error-report.h"
#include "qemu/memalign.h"
QLIST_ENTRY(BlockCopyCallState) list;
/*
- * Fields that report information about return values and erros.
+ * Fields that report information about return values and errors.
* Protected by lock in BlockCopyState.
*/
bool error_is_read;
* Do copy of cluster-aligned chunk. Requested region is allowed to exceed
* s->len only to cover last cluster when s->len is not aligned to clusters.
*
- * No sync here: nor bitmap neighter intersecting requests handling, only copy.
+ * No sync here: neither bitmap nor intersecting requests handling, only copy.
*
* @method is an in-out argument, so that copy_range can be either extended to
* a full-size buffer or disabled if the copy_range attempt fails. The output
* value of @method should be used for subsequent tasks.
* Returns 0 on success.
*/
-static int coroutine_fn block_copy_do_copy(BlockCopyState *s,
- int64_t offset, int64_t bytes,
- BlockCopyMethod *method,
- bool *error_is_read)
+static int coroutine_fn GRAPH_RDLOCK
+block_copy_do_copy(BlockCopyState *s, int64_t offset, int64_t bytes,
+ BlockCopyMethod *method, bool *error_is_read)
{
int ret;
int64_t nbytes = MIN(offset + bytes, s->len) - offset;
BlockCopyMethod method = t->method;
int ret;
- ret = block_copy_do_copy(s, t->req.offset, t->req.bytes, &method,
- &error_is_read);
+ WITH_GRAPH_RDLOCK_GUARD() {
+ ret = block_copy_do_copy(s, t->req.offset, t->req.bytes, &method,
+ &error_is_read);
+ }
WITH_QEMU_LOCK_GUARD(&s->lock) {
if (s->method == t->method) {
return ret;
}
-static int block_copy_block_status(BlockCopyState *s, int64_t offset,
- int64_t bytes, int64_t *pnum)
+static coroutine_fn GRAPH_RDLOCK
+int block_copy_block_status(BlockCopyState *s, int64_t offset, int64_t bytes,
+ int64_t *pnum)
{
int64_t num;
BlockDriverState *base;
base = NULL;
}
- ret = bdrv_block_status_above(s->source->bs, base, offset, bytes, &num,
- NULL, NULL);
+ ret = bdrv_co_block_status_above(s->source->bs, base, offset, bytes, &num,
+ NULL, NULL);
if (ret < 0 || num < s->cluster_size) {
/*
* On error or if failed to obtain large enough chunk just fallback to
* Check if the cluster starting at offset is allocated or not.
* return via pnum the number of contiguous clusters sharing this allocation.
*/
-static int block_copy_is_cluster_allocated(BlockCopyState *s, int64_t offset,
- int64_t *pnum)
+static int coroutine_fn GRAPH_RDLOCK
+block_copy_is_cluster_allocated(BlockCopyState *s, int64_t offset,
+ int64_t *pnum)
{
BlockDriverState *bs = s->source->bs;
int64_t count, total_count = 0;
assert(QEMU_IS_ALIGNED(offset, s->cluster_size));
while (true) {
- ret = bdrv_is_allocated(bs, offset, bytes, &count);
+ /* protected in backup_run() */
+ ret = bdrv_co_is_allocated(bs, offset, bytes, &count);
if (ret < 0) {
return ret;
}
* @return 0 when the cluster at @offset was unallocated,
* 1 otherwise, and -ret on error.
*/
-int64_t block_copy_reset_unallocated(BlockCopyState *s,
- int64_t offset, int64_t *count)
+int64_t coroutine_fn block_copy_reset_unallocated(BlockCopyState *s,
+ int64_t offset,
+ int64_t *count)
{
int ret;
int64_t clusters, bytes;
* Returns 1 if dirty clusters found and successfully copied, 0 if no dirty
* clusters found and -errno on failure.
*/
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
block_copy_dirty_clusters(BlockCopyCallState *call_state)
{
BlockCopyState *s = call_state->s;
* it means that some I/O operation failed in context of _this_ block_copy call,
* not some parallel operation.
*/
-static int coroutine_fn block_copy_common(BlockCopyCallState *call_state)
+static int coroutine_fn GRAPH_RDLOCK
+block_copy_common(BlockCopyCallState *call_state)
{
int ret;
BlockCopyState *s = call_state->s;
return ret;
}
+static void coroutine_fn block_copy_async_co_entry(void *opaque)
+{
+ GRAPH_RDLOCK_GUARD();
+ block_copy_common(opaque);
+}
+
int coroutine_fn block_copy(BlockCopyState *s, int64_t start, int64_t bytes,
- bool ignore_ratelimit)
+ bool ignore_ratelimit, uint64_t timeout_ns,
+ BlockCopyAsyncCallbackFunc cb,
+ void *cb_opaque)
{
- BlockCopyCallState call_state = {
+ int ret;
+ BlockCopyCallState *call_state = g_new(BlockCopyCallState, 1);
+
+ *call_state = (BlockCopyCallState) {
.s = s,
.offset = start,
.bytes = bytes,
.ignore_ratelimit = ignore_ratelimit,
.max_workers = BLOCK_COPY_MAX_WORKERS,
+ .cb = cb,
+ .cb_opaque = cb_opaque,
};
- return block_copy_common(&call_state);
-}
+ ret = qemu_co_timeout(block_copy_async_co_entry, call_state, timeout_ns,
+ g_free);
+ if (ret < 0) {
+ assert(ret == -ETIMEDOUT);
+ block_copy_call_cancel(call_state);
+ /* call_state will be freed by running coroutine. */
+ return ret;
+ }
-static void coroutine_fn block_copy_async_co_entry(void *opaque)
-{
- block_copy_common(opaque);
+ ret = call_state->ret;
+ g_free(call_state);
+
+ return ret;
}
BlockCopyCallState *block_copy_async(BlockCopyState *s,
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