mirror of https://github.com/proxmox/mirror_qemu
block/block-copy: rename start to offset in interfaces
offset/bytes pair is more usual naming in block layer, let's use it. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200311103004.7649-8-vsementsov@virtuozzo.com> Signed-off-by: Max Reitz <mreitz@redhat.com>master
parent
dafaf13593
commit
8719091f9d
|
@ -25,13 +25,13 @@
|
||||||
#define BLOCK_COPY_MAX_MEM (128 * MiB)
|
#define BLOCK_COPY_MAX_MEM (128 * MiB)
|
||||||
|
|
||||||
static BlockCopyInFlightReq *find_conflicting_inflight_req(BlockCopyState *s,
|
static BlockCopyInFlightReq *find_conflicting_inflight_req(BlockCopyState *s,
|
||||||
int64_t start,
|
int64_t offset,
|
||||||
int64_t bytes)
|
int64_t bytes)
|
||||||
{
|
{
|
||||||
BlockCopyInFlightReq *req;
|
BlockCopyInFlightReq *req;
|
||||||
|
|
||||||
QLIST_FOREACH(req, &s->inflight_reqs, list) {
|
QLIST_FOREACH(req, &s->inflight_reqs, list) {
|
||||||
if (start + bytes > req->start && start < req->start + req->bytes) {
|
if (offset + bytes > req->offset && offset < req->offset + req->bytes) {
|
||||||
return req;
|
return req;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -40,21 +40,21 @@ static BlockCopyInFlightReq *find_conflicting_inflight_req(BlockCopyState *s,
|
||||||
}
|
}
|
||||||
|
|
||||||
static void coroutine_fn block_copy_wait_inflight_reqs(BlockCopyState *s,
|
static void coroutine_fn block_copy_wait_inflight_reqs(BlockCopyState *s,
|
||||||
int64_t start,
|
int64_t offset,
|
||||||
int64_t bytes)
|
int64_t bytes)
|
||||||
{
|
{
|
||||||
BlockCopyInFlightReq *req;
|
BlockCopyInFlightReq *req;
|
||||||
|
|
||||||
while ((req = find_conflicting_inflight_req(s, start, bytes))) {
|
while ((req = find_conflicting_inflight_req(s, offset, bytes))) {
|
||||||
qemu_co_queue_wait(&req->wait_queue, NULL);
|
qemu_co_queue_wait(&req->wait_queue, NULL);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
static void block_copy_inflight_req_begin(BlockCopyState *s,
|
static void block_copy_inflight_req_begin(BlockCopyState *s,
|
||||||
BlockCopyInFlightReq *req,
|
BlockCopyInFlightReq *req,
|
||||||
int64_t start, int64_t bytes)
|
int64_t offset, int64_t bytes)
|
||||||
{
|
{
|
||||||
req->start = start;
|
req->offset = offset;
|
||||||
req->bytes = bytes;
|
req->bytes = bytes;
|
||||||
qemu_co_queue_init(&req->wait_queue);
|
qemu_co_queue_init(&req->wait_queue);
|
||||||
QLIST_INSERT_HEAD(&s->inflight_reqs, req, list);
|
QLIST_INSERT_HEAD(&s->inflight_reqs, req, list);
|
||||||
|
@ -161,26 +161,26 @@ void block_copy_set_progress_meter(BlockCopyState *s, ProgressMeter *pm)
|
||||||
* Returns 0 on success.
|
* Returns 0 on success.
|
||||||
*/
|
*/
|
||||||
static int coroutine_fn block_copy_do_copy(BlockCopyState *s,
|
static int coroutine_fn block_copy_do_copy(BlockCopyState *s,
|
||||||
int64_t start, int64_t bytes,
|
int64_t offset, int64_t bytes,
|
||||||
bool zeroes, bool *error_is_read)
|
bool zeroes, bool *error_is_read)
|
||||||
{
|
{
|
||||||
int ret;
|
int ret;
|
||||||
int64_t nbytes = MIN(start + bytes, s->len) - start;
|
int64_t nbytes = MIN(offset + bytes, s->len) - offset;
|
||||||
void *bounce_buffer = NULL;
|
void *bounce_buffer = NULL;
|
||||||
|
|
||||||
assert(start >= 0 && bytes > 0 && INT64_MAX - start >= bytes);
|
assert(offset >= 0 && bytes > 0 && INT64_MAX - offset >= bytes);
|
||||||
assert(QEMU_IS_ALIGNED(start, s->cluster_size));
|
assert(QEMU_IS_ALIGNED(offset, s->cluster_size));
|
||||||
assert(QEMU_IS_ALIGNED(bytes, s->cluster_size));
|
assert(QEMU_IS_ALIGNED(bytes, s->cluster_size));
|
||||||
assert(start < s->len);
|
assert(offset < s->len);
|
||||||
assert(start + bytes <= s->len ||
|
assert(offset + bytes <= s->len ||
|
||||||
start + bytes == QEMU_ALIGN_UP(s->len, s->cluster_size));
|
offset + bytes == QEMU_ALIGN_UP(s->len, s->cluster_size));
|
||||||
assert(nbytes < INT_MAX);
|
assert(nbytes < INT_MAX);
|
||||||
|
|
||||||
if (zeroes) {
|
if (zeroes) {
|
||||||
ret = bdrv_co_pwrite_zeroes(s->target, start, nbytes, s->write_flags &
|
ret = bdrv_co_pwrite_zeroes(s->target, offset, nbytes, s->write_flags &
|
||||||
~BDRV_REQ_WRITE_COMPRESSED);
|
~BDRV_REQ_WRITE_COMPRESSED);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
trace_block_copy_write_zeroes_fail(s, start, ret);
|
trace_block_copy_write_zeroes_fail(s, offset, ret);
|
||||||
if (error_is_read) {
|
if (error_is_read) {
|
||||||
*error_is_read = false;
|
*error_is_read = false;
|
||||||
}
|
}
|
||||||
|
@ -189,10 +189,10 @@ static int coroutine_fn block_copy_do_copy(BlockCopyState *s,
|
||||||
}
|
}
|
||||||
|
|
||||||
if (s->use_copy_range) {
|
if (s->use_copy_range) {
|
||||||
ret = bdrv_co_copy_range(s->source, start, s->target, start, nbytes,
|
ret = bdrv_co_copy_range(s->source, offset, s->target, offset, nbytes,
|
||||||
0, s->write_flags);
|
0, s->write_flags);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
trace_block_copy_copy_range_fail(s, start, ret);
|
trace_block_copy_copy_range_fail(s, offset, ret);
|
||||||
s->use_copy_range = false;
|
s->use_copy_range = false;
|
||||||
s->copy_size = MAX(s->cluster_size, BLOCK_COPY_MAX_BUFFER);
|
s->copy_size = MAX(s->cluster_size, BLOCK_COPY_MAX_BUFFER);
|
||||||
/* Fallback to read+write with allocated buffer */
|
/* Fallback to read+write with allocated buffer */
|
||||||
|
@ -228,19 +228,19 @@ static int coroutine_fn block_copy_do_copy(BlockCopyState *s,
|
||||||
|
|
||||||
bounce_buffer = qemu_blockalign(s->source->bs, nbytes);
|
bounce_buffer = qemu_blockalign(s->source->bs, nbytes);
|
||||||
|
|
||||||
ret = bdrv_co_pread(s->source, start, nbytes, bounce_buffer, 0);
|
ret = bdrv_co_pread(s->source, offset, nbytes, bounce_buffer, 0);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
trace_block_copy_read_fail(s, start, ret);
|
trace_block_copy_read_fail(s, offset, ret);
|
||||||
if (error_is_read) {
|
if (error_is_read) {
|
||||||
*error_is_read = true;
|
*error_is_read = true;
|
||||||
}
|
}
|
||||||
goto out;
|
goto out;
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = bdrv_co_pwrite(s->target, start, nbytes, bounce_buffer,
|
ret = bdrv_co_pwrite(s->target, offset, nbytes, bounce_buffer,
|
||||||
s->write_flags);
|
s->write_flags);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
trace_block_copy_write_fail(s, start, ret);
|
trace_block_copy_write_fail(s, offset, ret);
|
||||||
if (error_is_read) {
|
if (error_is_read) {
|
||||||
*error_is_read = false;
|
*error_is_read = false;
|
||||||
}
|
}
|
||||||
|
@ -358,7 +358,7 @@ int64_t block_copy_reset_unallocated(BlockCopyState *s,
|
||||||
}
|
}
|
||||||
|
|
||||||
int coroutine_fn block_copy(BlockCopyState *s,
|
int coroutine_fn block_copy(BlockCopyState *s,
|
||||||
int64_t start, int64_t bytes,
|
int64_t offset, int64_t bytes,
|
||||||
bool *error_is_read)
|
bool *error_is_read)
|
||||||
{
|
{
|
||||||
int ret = 0;
|
int ret = 0;
|
||||||
|
@ -371,64 +371,64 @@ int coroutine_fn block_copy(BlockCopyState *s,
|
||||||
assert(bdrv_get_aio_context(s->source->bs) ==
|
assert(bdrv_get_aio_context(s->source->bs) ==
|
||||||
bdrv_get_aio_context(s->target->bs));
|
bdrv_get_aio_context(s->target->bs));
|
||||||
|
|
||||||
assert(QEMU_IS_ALIGNED(start, s->cluster_size));
|
assert(QEMU_IS_ALIGNED(offset, s->cluster_size));
|
||||||
assert(QEMU_IS_ALIGNED(bytes, s->cluster_size));
|
assert(QEMU_IS_ALIGNED(bytes, s->cluster_size));
|
||||||
|
|
||||||
block_copy_wait_inflight_reqs(s, start, bytes);
|
block_copy_wait_inflight_reqs(s, offset, bytes);
|
||||||
block_copy_inflight_req_begin(s, &req, start, bytes);
|
block_copy_inflight_req_begin(s, &req, offset, bytes);
|
||||||
|
|
||||||
while (bytes) {
|
while (bytes) {
|
||||||
int64_t next_zero, cur_bytes, status_bytes;
|
int64_t next_zero, cur_bytes, status_bytes;
|
||||||
|
|
||||||
if (!bdrv_dirty_bitmap_get(s->copy_bitmap, start)) {
|
if (!bdrv_dirty_bitmap_get(s->copy_bitmap, offset)) {
|
||||||
trace_block_copy_skip(s, start);
|
trace_block_copy_skip(s, offset);
|
||||||
start += s->cluster_size;
|
offset += s->cluster_size;
|
||||||
bytes -= s->cluster_size;
|
bytes -= s->cluster_size;
|
||||||
continue; /* already copied */
|
continue; /* already copied */
|
||||||
}
|
}
|
||||||
|
|
||||||
cur_bytes = MIN(bytes, s->copy_size);
|
cur_bytes = MIN(bytes, s->copy_size);
|
||||||
|
|
||||||
next_zero = bdrv_dirty_bitmap_next_zero(s->copy_bitmap, start,
|
next_zero = bdrv_dirty_bitmap_next_zero(s->copy_bitmap, offset,
|
||||||
cur_bytes);
|
cur_bytes);
|
||||||
if (next_zero >= 0) {
|
if (next_zero >= 0) {
|
||||||
assert(next_zero > start); /* start is dirty */
|
assert(next_zero > offset); /* offset is dirty */
|
||||||
assert(next_zero < start + cur_bytes); /* no need to do MIN() */
|
assert(next_zero < offset + cur_bytes); /* no need to do MIN() */
|
||||||
cur_bytes = next_zero - start;
|
cur_bytes = next_zero - offset;
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = block_copy_block_status(s, start, cur_bytes, &status_bytes);
|
ret = block_copy_block_status(s, offset, cur_bytes, &status_bytes);
|
||||||
if (s->skip_unallocated && !(ret & BDRV_BLOCK_ALLOCATED)) {
|
if (s->skip_unallocated && !(ret & BDRV_BLOCK_ALLOCATED)) {
|
||||||
bdrv_reset_dirty_bitmap(s->copy_bitmap, start, status_bytes);
|
bdrv_reset_dirty_bitmap(s->copy_bitmap, offset, status_bytes);
|
||||||
progress_set_remaining(s->progress,
|
progress_set_remaining(s->progress,
|
||||||
bdrv_get_dirty_count(s->copy_bitmap) +
|
bdrv_get_dirty_count(s->copy_bitmap) +
|
||||||
s->in_flight_bytes);
|
s->in_flight_bytes);
|
||||||
trace_block_copy_skip_range(s, start, status_bytes);
|
trace_block_copy_skip_range(s, offset, status_bytes);
|
||||||
start += status_bytes;
|
offset += status_bytes;
|
||||||
bytes -= status_bytes;
|
bytes -= status_bytes;
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
|
|
||||||
cur_bytes = MIN(cur_bytes, status_bytes);
|
cur_bytes = MIN(cur_bytes, status_bytes);
|
||||||
|
|
||||||
trace_block_copy_process(s, start);
|
trace_block_copy_process(s, offset);
|
||||||
|
|
||||||
bdrv_reset_dirty_bitmap(s->copy_bitmap, start, cur_bytes);
|
bdrv_reset_dirty_bitmap(s->copy_bitmap, offset, cur_bytes);
|
||||||
s->in_flight_bytes += cur_bytes;
|
s->in_flight_bytes += cur_bytes;
|
||||||
|
|
||||||
co_get_from_shres(s->mem, cur_bytes);
|
co_get_from_shres(s->mem, cur_bytes);
|
||||||
ret = block_copy_do_copy(s, start, cur_bytes, ret & BDRV_BLOCK_ZERO,
|
ret = block_copy_do_copy(s, offset, cur_bytes, ret & BDRV_BLOCK_ZERO,
|
||||||
error_is_read);
|
error_is_read);
|
||||||
co_put_to_shres(s->mem, cur_bytes);
|
co_put_to_shres(s->mem, cur_bytes);
|
||||||
s->in_flight_bytes -= cur_bytes;
|
s->in_flight_bytes -= cur_bytes;
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
bdrv_set_dirty_bitmap(s->copy_bitmap, start, cur_bytes);
|
bdrv_set_dirty_bitmap(s->copy_bitmap, offset, cur_bytes);
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
|
||||||
progress_work_done(s->progress, cur_bytes);
|
progress_work_done(s->progress, cur_bytes);
|
||||||
s->progress_bytes_callback(cur_bytes, s->progress_opaque);
|
s->progress_bytes_callback(cur_bytes, s->progress_opaque);
|
||||||
start += cur_bytes;
|
offset += cur_bytes;
|
||||||
bytes -= cur_bytes;
|
bytes -= cur_bytes;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -19,7 +19,7 @@
|
||||||
#include "qemu/co-shared-resource.h"
|
#include "qemu/co-shared-resource.h"
|
||||||
|
|
||||||
typedef struct BlockCopyInFlightReq {
|
typedef struct BlockCopyInFlightReq {
|
||||||
int64_t start;
|
int64_t offset;
|
||||||
int64_t bytes;
|
int64_t bytes;
|
||||||
QLIST_ENTRY(BlockCopyInFlightReq) list;
|
QLIST_ENTRY(BlockCopyInFlightReq) list;
|
||||||
CoQueue wait_queue; /* coroutines blocked on this request */
|
CoQueue wait_queue; /* coroutines blocked on this request */
|
||||||
|
@ -85,7 +85,7 @@ void block_copy_state_free(BlockCopyState *s);
|
||||||
int64_t block_copy_reset_unallocated(BlockCopyState *s,
|
int64_t block_copy_reset_unallocated(BlockCopyState *s,
|
||||||
int64_t offset, int64_t *count);
|
int64_t offset, int64_t *count);
|
||||||
|
|
||||||
int coroutine_fn block_copy(BlockCopyState *s, int64_t start, int64_t bytes,
|
int coroutine_fn block_copy(BlockCopyState *s, int64_t offset, int64_t bytes,
|
||||||
bool *error_is_read);
|
bool *error_is_read);
|
||||||
|
|
||||||
#endif /* BLOCK_COPY_H */
|
#endif /* BLOCK_COPY_H */
|
||||||
|
|
Loading…
Reference in New Issue