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block: Mark public read/write functions GRAPH_RDLOCK

Browse Source 
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pread*/pwrite*() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-12-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-02-03 16:21:50 +01:00
parent 7b1fb72e2c
commit b9b10c35e5
31 changed files with 233 additions and 238 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/blkdebug.c
View File

@ -626,7 +626,7 @@ static int rule_check(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
return -error;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
blkdebug_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -647,7 +647,7 @@ blkdebug_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
blkdebug_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{

7
block/blklogwrites.c
View File

@ -294,7 +294,7 @@ static void blk_log_writes_refresh_limits(BlockDriverState *bs, Error **errp)
bs->bl.request_alignment = s->sectorsize;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
blk_log_writes_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -430,7 +430,7 @@ blk_log_writes_co_log(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
return fr.file_ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
blk_log_writes_co_do_file_pwritev(BlkLogWritesFileReq *fr)
{
return bdrv_co_pwritev(fr->bs->file, fr->offset, fr->bytes,
@ -456,11 +456,10 @@ blk_log_writes_co_do_file_pdiscard(BlkLogWritesFileReq *fr)
return bdrv_co_pdiscard(fr->bs->file, fr->offset, fr->bytes);
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
blk_log_writes_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
assume_graph_lock(); /* FIXME */
return blk_log_writes_co_log(bs, offset, bytes, qiov, flags,
blk_log_writes_co_do_file_pwritev, 0, false);
}

10
block/blkreplay.c
View File

@ -69,8 +69,9 @@ static void block_request_create(uint64_t reqid, BlockDriverState *bs,
replay_block_event(req->bh, reqid);
}
static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
blkreplay_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
@ -80,8 +81,9 @@ static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
return ret;
}
static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
blkreplay_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);

2
block/block-backend.c
View File

@ -1289,6 +1289,7 @@ blk_co_do_preadv_part(BlockBackend *blk, int64_t offset, int64_t bytes,
IO_CODE();
blk_wait_while_drained(blk);
GRAPH_RDLOCK_GUARD();
/* Call blk_bs() only after waiting, the graph may have changed */
bs = blk_bs(blk);
@ -1363,6 +1364,7 @@ blk_co_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
IO_CODE();
blk_wait_while_drained(blk);
GRAPH_RDLOCK_GUARD();
/* Call blk_bs() only after waiting, the graph may have changed */
bs = blk_bs(blk);

2
block/bochs.c
View File

@ -237,7 +237,7 @@ static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
return bitmap_offset + (512 * (s->bitmap_blocks + extent_offset));
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
bochs_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{

5
block/commit.c
View File

@ -207,8 +207,9 @@ static const BlockJobDriver commit_job_driver = {
},
};
static int coroutine_fn bdrv_commit_top_preadv(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
bdrv_commit_top_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}

14
block/copy-before-write.c
View File

@ -78,8 +78,8 @@ typedef struct BDRVCopyBeforeWriteState {
int snapshot_error;
} BDRVCopyBeforeWriteState;
static coroutine_fn int cbw_co_preadv(
BlockDriverState *bs, int64_t offset, int64_t bytes,
static int coroutine_fn GRAPH_RDLOCK
cbw_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
@ -172,11 +172,9 @@ cbw_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes,
return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
}
static coroutine_fn int cbw_co_pwritev(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
static coroutine_fn GRAPH_RDLOCK
int cbw_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret = cbw_do_copy_before_write(bs, offset, bytes, flags);
if (ret < 0) {
@ -266,6 +264,8 @@ cbw_co_preadv_snapshot(BlockDriverState *bs, int64_t offset, int64_t bytes,
BdrvChild *file;
int ret;
assume_graph_lock(); /* FIXME */
/* TODO: upgrade to async loop using AioTask */
while (bytes) {
int64_t cur_bytes;

20
block/copy-on-read.c
View File

@ -127,10 +127,9 @@ static int64_t coroutine_fn cor_co_getlength(BlockDriverState *bs)
}
static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
static int coroutine_fn GRAPH_RDLOCK
cor_co_preadv_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
int64_t n;
@ -180,11 +179,9 @@ static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
}
static int coroutine_fn cor_co_pwritev_part(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
static int coroutine_fn GRAPH_RDLOCK
cor_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
@ -207,9 +204,8 @@ cor_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
}
static int coroutine_fn cor_co_pwritev_compressed(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
static int coroutine_fn GRAPH_RDLOCK
cor_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov)
{
return bdrv_co_pwritev(bs->file, offset, bytes, qiov,

4
block/crypto.c
View File

@ -397,7 +397,7 @@ static int block_crypto_reopen_prepare(BDRVReopenState *state,
*/
#define BLOCK_CRYPTO_MAX_IO_SIZE (1024 * 1024)
static coroutine_fn int
static int coroutine_fn GRAPH_RDLOCK
block_crypto_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -459,7 +459,7 @@ block_crypto_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static coroutine_fn int
static int coroutine_fn GRAPH_RDLOCK
block_crypto_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{

15
block/filter-compress.c
View File

@ -61,10 +61,9 @@ static int64_t coroutine_fn compress_co_getlength(BlockDriverState *bs)
}
static int coroutine_fn compress_co_preadv_part(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
static int coroutine_fn GRAPH_RDLOCK
compress_co_preadv_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset,
@ -72,11 +71,9 @@ static int coroutine_fn compress_co_preadv_part(BlockDriverState *bs,
}
static int coroutine_fn compress_co_pwritev_part(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
static int coroutine_fn GRAPH_RDLOCK
compress_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,

7
block/io.c
View File

@ -971,6 +971,7 @@ bdrv_driver_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
unsigned int nb_sectors;
QEMUIOVector local_qiov;
int ret;
assert_bdrv_graph_readable();
bdrv_check_qiov_request(offset, bytes, qiov, qiov_offset, &error_abort);
assert(!(flags & ~bs->supported_read_flags));
@ -1041,6 +1042,7 @@ bdrv_driver_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
unsigned int nb_sectors;
QEMUIOVector local_qiov;
int ret;
assert_bdrv_graph_readable();
bdrv_check_qiov_request(offset, bytes, qiov, qiov_offset, &error_abort);
@ -1119,6 +1121,7 @@ bdrv_driver_pwritev_compressed(BlockDriverState *bs, int64_t offset,
BlockDriver *drv = bs->drv;
QEMUIOVector local_qiov;
int ret;
assert_bdrv_graph_readable();
bdrv_check_qiov_request(offset, bytes, qiov, qiov_offset, &error_abort);
@ -1621,8 +1624,6 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
int ret;
IO_CODE();
assume_graph_lock(); /* FIXME */
trace_bdrv_co_preadv_part(bs, offset, bytes, flags);
if (!bdrv_co_is_inserted(bs)) {
@ -2073,8 +2074,6 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
bool padded = false;
IO_CODE();
assume_graph_lock(); /* FIXME */
trace_bdrv_co_pwritev_part(child->bs, offset, bytes, flags);
if (!bdrv_co_is_inserted(bs)) {

14
block/mirror.c
View File

@ -390,8 +390,10 @@ static void coroutine_fn mirror_co_read(void *opaque)
op->is_in_flight = true;
trace_mirror_one_iteration(s, op->offset, op->bytes);
WITH_GRAPH_RDLOCK_GUARD() {
ret = bdrv_co_preadv(s->mirror_top_bs->backing, op->offset, op->bytes,
&op->qiov, 0);
}
mirror_read_complete(op, ret);
}
@ -1437,8 +1439,9 @@ static void coroutine_fn active_write_settle(MirrorOp *op)
g_free(op);
}
static int coroutine_fn bdrv_mirror_top_preadv(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
bdrv_mirror_top_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
@ -1495,8 +1498,9 @@ out:
return ret;
}
static int coroutine_fn bdrv_mirror_top_pwritev(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
bdrv_mirror_top_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
MirrorBDSOpaque *s = bs->opaque;
QEMUIOVector bounce_qiov;
@ -1504,8 +1508,6 @@ static int coroutine_fn bdrv_mirror_top_pwritev(BlockDriverState *bs,
int ret = 0;
bool copy_to_target = false;
assume_graph_lock(); /* FIXME */
if (s->job) {
copy_to_target = s->job->ret >= 0 &&
!job_is_cancelled(&s->job->common.job) &&

8
block/parallels.c
View File

@ -261,7 +261,8 @@ allocate_clusters(BlockDriverState *bs, int64_t sector_num,
}
static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs)
static int coroutine_fn GRAPH_RDLOCK
parallels_co_flush_to_os(BlockDriverState *bs)
{
BDRVParallelsState *s = bs->opaque;
unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block);
@ -363,8 +364,9 @@ parallels_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
return ret;
}
static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
static int coroutine_fn GRAPH_RDLOCK
parallels_co_readv(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov)
{
BDRVParallelsState *s = bs->opaque;
uint64_t bytes_done = 0;

16
block/preallocate.c
View File

@ -226,9 +226,10 @@ static void preallocate_reopen_abort(BDRVReopenState *state)
state->opaque = NULL;
}
static coroutine_fn int preallocate_co_preadv_part(
BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
preallocate_co_preadv_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset,
flags);
@ -359,14 +360,11 @@ preallocate_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
}
static coroutine_fn int preallocate_co_pwritev_part(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
static int coroutine_fn GRAPH_RDLOCK
preallocate_co_pwritev_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
assume_graph_lock(); /* FIXME */
handle_write(bs, offset, bytes, false);
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,

8
block/qcow.c
View File

@ -92,8 +92,8 @@ typedef struct BDRVQcowState {
static QemuOptsList qcow_create_opts;
static int coroutine_fn decompress_cluster(BlockDriverState *bs,
uint64_t cluster_offset);
static int coroutine_fn GRAPH_RDLOCK
decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
{
@ -584,8 +584,8 @@ static int decompress_buffer(uint8_t *out_buf, int out_buf_size,
return 0;
}
static int coroutine_fn decompress_cluster(BlockDriverState *bs,
uint64_t cluster_offset)
static int coroutine_fn GRAPH_RDLOCK
decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
{
BDRVQcowState *s = bs->opaque;
int ret, csize;

7
block/qcow2-cluster.c
View File

@ -534,10 +534,9 @@ do_perform_cow_read(BlockDriverState *bs, uint64_t src_cluster_offset,
return 0;
}
static int coroutine_fn do_perform_cow_write(BlockDriverState *bs,
uint64_t cluster_offset,
unsigned offset_in_cluster,
QEMUIOVector *qiov)
static int coroutine_fn GRAPH_RDLOCK
do_perform_cow_write(BlockDriverState *bs, uint64_t cluster_offset,
unsigned offset_in_cluster, QEMUIOVector *qiov)
{
BDRVQcow2State *s = bs->opaque;
int ret;

47
block/qcow2.c
View File

@ -601,8 +601,8 @@ static void qcow2_add_check_result(BdrvCheckResult *out,
}
}
static int coroutine_fn qcow2_co_check_locked(BlockDriverState *bs,
BdrvCheckResult *result,
static int coroutine_fn GRAPH_RDLOCK
qcow2_co_check_locked(BlockDriverState *bs, BdrvCheckResult *result,
BdrvCheckMode fix)
{
BdrvCheckResult snapshot_res = {};
@ -640,8 +640,8 @@ static int coroutine_fn qcow2_co_check_locked(BlockDriverState *bs,
return ret;
}
static int coroutine_fn qcow2_co_check(BlockDriverState *bs,
BdrvCheckResult *result,
static int coroutine_fn GRAPH_RDLOCK
qcow2_co_check(BlockDriverState *bs, BdrvCheckResult *result,
BdrvCheckMode fix)
{
BDRVQcow2State *s = bs->opaque;
@ -1294,9 +1294,9 @@ static int validate_compression_type(BDRVQcow2State *s, Error **errp)
}
/* Called with s->lock held. */
static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
int flags, bool open_data_file,
Error **errp)
static int coroutine_fn GRAPH_RDLOCK
qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
bool open_data_file, Error **errp)
{
ERRP_GUARD();
BDRVQcow2State *s = bs->opaque;
@ -1890,6 +1890,8 @@ static void coroutine_fn qcow2_open_entry(void *opaque)
QCow2OpenCo *qoc = opaque;
BDRVQcow2State *s = qoc->bs->opaque;
assume_graph_lock(); /* FIXME */
qemu_co_mutex_lock(&s->lock);
qoc->ret = qcow2_do_open(qoc->bs, qoc->options, qoc->flags, true,
qoc->errp);
@ -2169,7 +2171,7 @@ out:
return ret;
}
static coroutine_fn int
static int coroutine_fn GRAPH_RDLOCK
qcow2_co_preadv_encrypted(BlockDriverState *bs,
uint64_t host_offset,
uint64_t offset,
@ -2270,12 +2272,10 @@ static coroutine_fn int qcow2_add_task(BlockDriverState *bs,
return 0;
}
static coroutine_fn int qcow2_co_preadv_task(BlockDriverState *bs,
QCow2SubclusterType subc_type,
uint64_t host_offset,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset)
static int coroutine_fn GRAPH_RDLOCK
qcow2_co_preadv_task(BlockDriverState *bs, QCow2SubclusterType subc_type,
uint64_t host_offset, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset)
{
BDRVQcow2State *s = bs->opaque;
@ -2314,7 +2314,11 @@ static coroutine_fn int qcow2_co_preadv_task(BlockDriverState *bs,
g_assert_not_reached();
}
static coroutine_fn int qcow2_co_preadv_task_entry(AioTask *task)
/*
* This function can count as GRAPH_RDLOCK because qcow2_co_preadv_part() holds
* the graph lock and keeps it until this coroutine has terminated.
*/
static int coroutine_fn GRAPH_RDLOCK qcow2_co_preadv_task_entry(AioTask *task)
{
Qcow2AioTask *t = container_of(task, Qcow2AioTask, task);
@ -2325,10 +2329,9 @@ static coroutine_fn int qcow2_co_preadv_task_entry(AioTask *task)
t->qiov, t->qiov_offset);
}
static coroutine_fn int qcow2_co_preadv_part(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
static int coroutine_fn GRAPH_RDLOCK
qcow2_co_preadv_part(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
BDRVQcow2State *s = bs->opaque;
@ -2774,8 +2777,8 @@ static void qcow2_close(BlockDriverState *bs)
qcow2_do_close(bs, true);
}
static void coroutine_fn qcow2_co_invalidate_cache(BlockDriverState *bs,
Error **errp)
static void coroutine_fn GRAPH_RDLOCK
qcow2_co_invalidate_cache(BlockDriverState *bs, Error **errp)
{
ERRP_GUARD();
BDRVQcow2State *s = bs->opaque;
@ -4737,7 +4740,7 @@ qcow2_co_pwritev_compressed_part(BlockDriverState *bs,
return ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
qcow2_co_preadv_compressed(BlockDriverState *bs,
uint64_t l2_entry,
uint64_t offset,

7
block/qcow2.h
View File

@ -846,7 +846,7 @@ int qcow2_validate_table(BlockDriverState *bs, uint64_t offset,
Error **errp);
/* qcow2-refcount.c functions */
int coroutine_fn qcow2_refcount_init(BlockDriverState *bs);
int coroutine_fn GRAPH_RDLOCK qcow2_refcount_init(BlockDriverState *bs);
void qcow2_refcount_close(BlockDriverState *bs);
int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
@ -954,9 +954,10 @@ void qcow2_free_snapshots(BlockDriverState *bs);
int qcow2_read_snapshots(BlockDriverState *bs, Error **errp);
int qcow2_write_snapshots(BlockDriverState *bs);
int coroutine_fn qcow2_check_read_snapshot_table(BlockDriverState *bs,
BdrvCheckResult *result,
int coroutine_fn GRAPH_RDLOCK
qcow2_check_read_snapshot_table(BlockDriverState *bs, BdrvCheckResult *result,
BdrvCheckMode fix);
int coroutine_fn qcow2_check_fix_snapshot_table(BlockDriverState *bs,
BdrvCheckResult *result,
BdrvCheckMode fix);

4
block/qed-table.c
View File

@ -21,8 +21,8 @@
#include "qemu/memalign.h"
/* Called with table_lock held. */
static int coroutine_fn qed_read_table(BDRVQEDState *s, uint64_t offset,
QEDTable *table)
static int coroutine_fn GRAPH_RDLOCK
qed_read_table(BDRVQEDState *s, uint64_t offset, QEDTable *table)
{
unsigned int bytes = s->header.cluster_size * s->header.table_size;

27
block/qed.c
View File

@ -100,7 +100,7 @@ int qed_write_header_sync(BDRVQEDState *s)
*
* No new allocating reqs can start while this function runs.
*/
static int coroutine_fn qed_write_header(BDRVQEDState *s)
static int coroutine_fn GRAPH_RDLOCK qed_write_header(BDRVQEDState *s)
{
/* We must write full sectors for O_DIRECT but cannot necessarily generate
* the data following the header if an unrecognized compat feature is
@ -826,10 +826,9 @@ fail:
return ret;
}
static int coroutine_fn bdrv_qed_co_block_status(BlockDriverState *bs,
bool want_zero,
int64_t pos, int64_t bytes,
int64_t *pnum, int64_t *map,
static int coroutine_fn GRAPH_RDLOCK
bdrv_qed_co_block_status(BlockDriverState *bs, bool want_zero, int64_t pos,
int64_t bytes, int64_t *pnum, int64_t *map,
BlockDriverState **file)
{
BDRVQEDState *s = bs->opaque;
@ -883,8 +882,8 @@ static BDRVQEDState *acb_to_s(QEDAIOCB *acb)
* This function reads qiov->size bytes starting at pos from the backing file.
* If there is no backing file then zeroes are read.
*/
static int coroutine_fn qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
QEMUIOVector *qiov)
static int coroutine_fn GRAPH_RDLOCK
qed_read_backing_file(BDRVQEDState *s, uint64_t pos, QEMUIOVector *qiov)
{
if (s->bs->backing) {
BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING_AIO);
@ -902,8 +901,8 @@ static int coroutine_fn qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
* @len: Number of bytes
* @offset: Byte offset in image file
*/
static int coroutine_fn qed_copy_from_backing_file(BDRVQEDState *s,
uint64_t pos, uint64_t len,
static int coroutine_fn GRAPH_RDLOCK
qed_copy_from_backing_file(BDRVQEDState *s, uint64_t pos, uint64_t len,
uint64_t offset)
{
QEMUIOVector qiov;
@ -1066,7 +1065,7 @@ qed_aio_write_l2_update(QEDAIOCB *acb, uint64_t offset)
*
* Called with table_lock *not* held.
*/
static int coroutine_fn qed_aio_write_main(QEDAIOCB *acb)
static int coroutine_fn GRAPH_RDLOCK qed_aio_write_main(QEDAIOCB *acb)
{
BDRVQEDState *s = acb_to_s(acb);
uint64_t offset = acb->cur_cluster +
@ -1226,8 +1225,8 @@ qed_aio_write_alloc(QEDAIOCB *acb, size_t len)
*
* Called with table_lock held.
*/
static int coroutine_fn qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset,
size_t len)
static int coroutine_fn GRAPH_RDLOCK
qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset, size_t len)
{
BDRVQEDState *s = acb_to_s(acb);
int r;
@ -1302,8 +1301,8 @@ qed_aio_write_data(void *opaque, int ret, uint64_t offset, size_t len)
*
* Called with table_lock held.
*/
static int coroutine_fn qed_aio_read_data(void *opaque, int ret,
uint64_t offset, size_t len)
static int coroutine_fn GRAPH_RDLOCK
qed_aio_read_data(void *opaque, int ret, uint64_t offset, size_t len)
{
QEDAIOCB *acb = opaque;
BDRVQEDState *s = acb_to_s(acb);

18
block/qed.h
View File

@ -200,7 +200,7 @@ void qed_commit_l2_cache_entry(L2TableCache *l2_cache, CachedL2Table *l2_table);
/**
* Table I/O functions
*/
int coroutine_fn qed_read_l1_table_sync(BDRVQEDState *s);
int coroutine_fn GRAPH_RDLOCK qed_read_l1_table_sync(BDRVQEDState *s);
int coroutine_fn GRAPH_RDLOCK
qed_write_l1_table(BDRVQEDState *s, unsigned int index, unsigned int n);
@ -208,10 +208,11 @@ qed_write_l1_table(BDRVQEDState *s, unsigned int index, unsigned int n);
int coroutine_fn GRAPH_RDLOCK
qed_write_l1_table_sync(BDRVQEDState *s, unsigned int index, unsigned int n);
int coroutine_fn qed_read_l2_table_sync(BDRVQEDState *s, QEDRequest *request,
uint64_t offset);
int coroutine_fn qed_read_l2_table(BDRVQEDState *s, QEDRequest *request,
uint64_t offset);
int coroutine_fn GRAPH_RDLOCK
qed_read_l2_table_sync(BDRVQEDState *s, QEDRequest *request, uint64_t offset);
int coroutine_fn GRAPH_RDLOCK
qed_read_l2_table(BDRVQEDState *s, QEDRequest *request, uint64_t offset);
int coroutine_fn GRAPH_RDLOCK
qed_write_l2_table(BDRVQEDState *s, QEDRequest *request, unsigned int index,
@ -224,9 +225,9 @@ qed_write_l2_table_sync(BDRVQEDState *s, QEDRequest *request,
/**
* Cluster functions
*/
int coroutine_fn qed_find_cluster(BDRVQEDState *s, QEDRequest *request,
uint64_t pos, size_t *len,
uint64_t *img_offset);
int coroutine_fn GRAPH_RDLOCK
qed_find_cluster(BDRVQEDState *s, QEDRequest *request, uint64_t pos,
size_t *len, uint64_t *img_offset);
/**
* Consistency check
@ -234,7 +235,6 @@ int coroutine_fn qed_find_cluster(BDRVQEDState *s, QEDRequest *request,
int coroutine_fn GRAPH_RDLOCK
qed_check(BDRVQEDState *s, BdrvCheckResult *result, bool fix);
QEDTable *qed_alloc_table(BDRVQEDState *s);
/**

29
block/quorum.c
View File

@ -270,7 +270,11 @@ static void quorum_report_bad_versions(BDRVQuorumState *s,
}
}
static void coroutine_fn quorum_rewrite_entry(void *opaque)
/*
* This function can count as GRAPH_RDLOCK because read_quorum_children() holds
* the graph lock and keeps it until this coroutine has terminated.
*/
static void coroutine_fn GRAPH_RDLOCK quorum_rewrite_entry(void *opaque)
{
QuorumCo *co = opaque;
QuorumAIOCB *acb = co->acb;
@ -290,8 +294,8 @@ static void coroutine_fn quorum_rewrite_entry(void *opaque)
}
}
static bool quorum_rewrite_bad_versions(QuorumAIOCB *acb,
QuorumVoteValue *value)
static bool coroutine_fn GRAPH_RDLOCK
quorum_rewrite_bad_versions(QuorumAIOCB *acb, QuorumVoteValue *value)
{
QuorumVoteVersion *version;
QuorumVoteItem *item;
@ -491,7 +495,7 @@ static int quorum_vote_error(QuorumAIOCB *acb)
return ret;
}
static void quorum_vote(QuorumAIOCB *acb)
static void coroutine_fn GRAPH_RDLOCK quorum_vote(QuorumAIOCB *acb)
{
bool quorum = true;
int i, j, ret;
@ -571,7 +575,11 @@ free_exit:
quorum_free_vote_list(&acb->votes);
}
static void coroutine_fn read_quorum_children_entry(void *opaque)
/*
* This function can count as GRAPH_RDLOCK because read_quorum_children() holds
* the graph lock and keeps it until this coroutine has terminated.
*/
static void coroutine_fn GRAPH_RDLOCK read_quorum_children_entry(void *opaque)
{
QuorumCo *co = opaque;
QuorumAIOCB *acb = co->acb;
@ -599,7 +607,7 @@ static void coroutine_fn read_quorum_children_entry(void *opaque)
}
}
static int coroutine_fn read_quorum_children(QuorumAIOCB *acb)
static int coroutine_fn GRAPH_RDLOCK read_quorum_children(QuorumAIOCB *acb)
{
BDRVQuorumState *s = acb->bs->opaque;
int i;
@ -640,7 +648,7 @@ static int coroutine_fn read_quorum_children(QuorumAIOCB *acb)
return acb->vote_ret;
}
static int coroutine_fn read_fifo_child(QuorumAIOCB *acb)
static int coroutine_fn GRAPH_RDLOCK read_fifo_child(QuorumAIOCB *acb)
{
BDRVQuorumState *s = acb->bs->opaque;
int n, ret;
@ -661,10 +669,9 @@ static int coroutine_fn read_fifo_child(QuorumAIOCB *acb)
return ret;
}
static int coroutine_fn quorum_co_preadv(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
quorum_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVQuorumState *s = bs->opaque;
QuorumAIOCB *acb = quorum_aio_get(bs, qiov, offset, bytes, flags);

12
block/raw-format.c
View File

@ -203,9 +203,9 @@ static inline int raw_adjust_offset(BlockDriverState *bs, int64_t *offset,
return 0;
}
static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
raw_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
@ -218,9 +218,9 @@ static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
}
static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
raw_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
void *buf = NULL;
BlockDriver *drv;

15
block/replication.c
View File

@ -220,10 +220,9 @@ static int replication_return_value(BDRVReplicationState *s, int ret)
return ret;
}
static coroutine_fn int replication_co_readv(BlockDriverState *bs,
int64_t sector_num,
int remaining_sectors,
QEMUIOVector *qiov)
static int coroutine_fn GRAPH_RDLOCK
replication_co_readv(BlockDriverState *bs, int64_t sector_num,
int remaining_sectors, QEMUIOVector *qiov)
{
BDRVReplicationState *s = bs->opaque;
int ret;
@ -244,11 +243,9 @@ static coroutine_fn int replication_co_readv(BlockDriverState *bs,
return replication_return_value(s, ret);
}
static coroutine_fn int replication_co_writev(BlockDriverState *bs,
int64_t sector_num,
int remaining_sectors,
QEMUIOVector *qiov,
int flags)
static int coroutine_fn GRAPH_RDLOCK
replication_co_writev(BlockDriverState *bs, int64_t sector_num,
int remaining_sectors, QEMUIOVector *qiov, int flags)
{
BDRVReplicationState *s = bs->opaque;
QEMUIOVector hd_qiov;

21
block/throttle.c
View File

@ -111,10 +111,9 @@ static int64_t coroutine_fn throttle_co_getlength(BlockDriverState *bs)
return bdrv_co_getlength(bs->file->bs);
}
static int coroutine_fn throttle_co_preadv(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
throttle_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
ThrottleGroupMember *tgm = bs->opaque;
@ -123,10 +122,9 @@ static int coroutine_fn throttle_co_preadv(BlockDriverState *bs,
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
}
static int coroutine_fn throttle_co_pwritev(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
throttle_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
ThrottleGroupMember *tgm = bs->opaque;
throttle_group_co_io_limits_intercept(tgm, bytes, true);
@ -153,10 +151,9 @@ throttle_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
return bdrv_co_pdiscard(bs->file, offset, bytes);
}
static int coroutine_fn throttle_co_pwritev_compressed(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov)
static int coroutine_fn GRAPH_RDLOCK
throttle_co_pwritev_compressed(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov)
{
return throttle_co_pwritev(bs, offset, bytes, qiov,
BDRV_REQ_WRITE_COMPRESSED);

4
block/vdi.c
View File

@ -544,7 +544,7 @@ static int coroutine_fn vdi_co_block_status(BlockDriverState *bs,
(s->header.image_type == VDI_TYPE_STATIC ? BDRV_BLOCK_RECURSE : 0);
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vdi_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -600,7 +600,7 @@ vdi_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
return ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vdi_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{

11
block/vhdx.c
View File

@ -1172,8 +1172,9 @@ vhdx_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
}
static coroutine_fn int vhdx_co_readv(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
static int coroutine_fn GRAPH_RDLOCK
vhdx_co_readv(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov)
{
BDRVVHDXState *s = bs->opaque;
int ret = 0;
@ -1324,9 +1325,9 @@ int vhdx_user_visible_write(BlockDriverState *bs, BDRVVHDXState *s)
return ret;
}
static coroutine_fn int vhdx_co_writev(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov,
int flags)
static int coroutine_fn GRAPH_RDLOCK
vhdx_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov, int flags)
{
int ret = -ENOTSUP;
BDRVVHDXState *s = bs->opaque;

59
block/vmdk.c
View File

@ -1403,12 +1403,10 @@ static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp)
* [@skip_start_sector, @skip_end_sector) is not copied or written, and leave
* it for call to write user data in the request.
*/
static int coroutine_fn get_whole_cluster(BlockDriverState *bs,
VmdkExtent *extent,
uint64_t cluster_offset,
uint64_t offset,
uint64_t skip_start_bytes,
uint64_t skip_end_bytes,
static int coroutine_fn GRAPH_RDLOCK
get_whole_cluster(BlockDriverState *bs, VmdkExtent *extent,
uint64_t cluster_offset, uint64_t offset,
uint64_t skip_start_bytes, uint64_t skip_end_bytes,
bool zeroed)
{
int ret = VMDK_OK;
@ -1536,13 +1534,10 @@ vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, uint32_t offset)
* VMDK_UNALLOC if cluster is not mapped and @allocate is false.
* VMDK_ERROR if failed.
*/
static int coroutine_fn get_cluster_offset(BlockDriverState *bs,
VmdkExtent *extent,
VmdkMetaData *m_data,
uint64_t offset,
bool allocate,
uint64_t *cluster_offset,
uint64_t skip_start_bytes,
static int coroutine_fn GRAPH_RDLOCK
get_cluster_offset(BlockDriverState *bs, VmdkExtent *extent,
VmdkMetaData *m_data, uint64_t offset, bool allocate,
uint64_t *cluster_offset, uint64_t skip_start_bytes,
uint64_t skip_end_bytes)
{
unsigned int l1_index, l2_offset, l2_index;
@ -1736,11 +1731,10 @@ static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent,
return extent_relative_offset % cluster_size;
}
static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs,
bool want_zero,
int64_t offset, int64_t bytes,
int64_t *pnum, int64_t *map,
BlockDriverState **file)
static int coroutine_fn GRAPH_RDLOCK
vmdk_co_block_status(BlockDriverState *bs, bool want_zero,
int64_t offset, int64_t bytes, int64_t *pnum,
int64_t *map, BlockDriverState **file)
{
BDRVVmdkState *s = bs->opaque;
int64_t index_in_cluster, n, ret;
@ -1785,7 +1779,7 @@ static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs,
return ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
int64_t offset_in_cluster, QEMUIOVector *qiov,
uint64_t qiov_offset, uint64_t n_bytes,
@ -1867,10 +1861,9 @@ vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
return ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
int64_t offset_in_cluster, QEMUIOVector *qiov,
int bytes)
int64_t offset_in_cluster, QEMUIOVector *qiov, int bytes)
{
int ret;
int cluster_bytes, buf_bytes;
@ -1934,7 +1927,7 @@ vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
return ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -2016,9 +2009,9 @@ fail:
*
* Returns: error code with 0 for success.
*/
static int coroutine_fn vmdk_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov,
bool zeroed, bool zero_dry_run)
static int coroutine_fn GRAPH_RDLOCK
vmdk_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, bool zeroed, bool zero_dry_run)
{
BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent = NULL;
@ -2028,8 +2021,6 @@ static int coroutine_fn vmdk_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes_done = 0;
VmdkMetaData m_data;
assume_graph_lock(); /* FIXME */
if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) {
error_report("Wrong offset: offset=0x%" PRIx64
" total_sectors=0x%" PRIx64,
@ -2116,7 +2107,7 @@ static int coroutine_fn vmdk_pwritev(BlockDriverState *bs, uint64_t offset,
return 0;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -2156,9 +2147,8 @@ vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
return vmdk_co_pwritev(bs, offset, bytes, qiov, 0);
}
static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
static int coroutine_fn GRAPH_RDLOCK
vmdk_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes,
BdrvRequestFlags flags)
{
int ret;
@ -2920,9 +2910,8 @@ static VmdkExtentInfo *vmdk_get_extent_info(VmdkExtent *extent)
return info;
}
static int coroutine_fn vmdk_co_check(BlockDriverState *bs,
BdrvCheckResult *result,
BdrvCheckMode fix)
static int coroutine_fn GRAPH_RDLOCK
vmdk_co_check(BlockDriverState *bs, BdrvCheckResult *result, BdrvCheckMode fix)
{
BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent = NULL;

4
block/vpc.c
View File

@ -610,7 +610,7 @@ vpc_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return 0;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vpc_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@ -660,7 +660,7 @@ fail:
return ret;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
vpc_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{

14
include/block/block_int-io.h
View File

@ -44,33 +44,35 @@ int coroutine_fn GRAPH_RDLOCK bdrv_co_pdiscard_snapshot(BlockDriverState *bs,
int64_t offset, int64_t bytes);
int coroutine_fn bdrv_co_preadv(BdrvChild *child,
int coroutine_fn GRAPH_RDLOCK bdrv_co_preadv(BdrvChild *child,
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
int coroutine_fn GRAPH_RDLOCK bdrv_co_preadv_part(BdrvChild *child,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags);
int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
int coroutine_fn GRAPH_RDLOCK bdrv_co_pwritev(BdrvChild *child,
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
int coroutine_fn GRAPH_RDLOCK bdrv_co_pwritev_part(BdrvChild *child,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags);
static inline int coroutine_fn bdrv_co_pread(BdrvChild *child,
static inline int coroutine_fn GRAPH_RDLOCK bdrv_co_pread(BdrvChild *child,
int64_t offset, int64_t bytes, void *buf, BdrvRequestFlags flags)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
IO_CODE();
assert_bdrv_graph_readable();
return bdrv_co_preadv(child, offset, bytes, &qiov, flags);
}
static inline int coroutine_fn bdrv_co_pwrite(BdrvChild *child,
static inline int coroutine_fn GRAPH_RDLOCK bdrv_co_pwrite(BdrvChild *child,
int64_t offset, int64_t bytes, const void *buf, BdrvRequestFlags flags)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
IO_CODE();
assert_bdrv_graph_readable();
return bdrv_co_pwritev(child, offset, bytes, &qiov, flags);
}

20
tests/unit/test-bdrv-drain.c
View File

@ -933,10 +933,9 @@ static void bdrv_test_top_close(BlockDriverState *bs)
}
}
static int coroutine_fn bdrv_test_top_co_preadv(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
bdrv_test_top_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVTestTopState *tts = bs->opaque;
return bdrv_co_preadv(tts->wait_child, offset, bytes, qiov, flags);
@ -967,6 +966,8 @@ static void coroutine_fn test_co_delete_by_drain(void *opaque)
void *buffer = g_malloc(65536);
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buffer, 65536);
GRAPH_RDLOCK_GUARD();
/* Pretend some internal write operation from parent to child.
* Important: We have to read from the child, not from the parent!
* Draining works by first propagating it all up the tree to the
@ -1698,11 +1699,9 @@ static void bdrv_replace_test_close(BlockDriverState *bs)
* Otherwise:
* Set .has_read to true and return success.
*/
static int coroutine_fn bdrv_replace_test_co_preadv(BlockDriverState *bs,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
static int coroutine_fn GRAPH_RDLOCK
bdrv_replace_test_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVReplaceTestState *s = bs->opaque;
@ -1778,7 +1777,10 @@ static void coroutine_fn bdrv_replace_test_read_entry(void *opaque)
int ret;
/* Queue a read request post-drain */
bdrv_graph_co_rdlock();
ret = bdrv_replace_test_co_preadv(bs, 0, 1, &qiov, 0);
bdrv_graph_co_rdunlock();
g_assert(ret >= 0);
bdrv_dec_in_flight(bs);
}