[GEDI] [PATCH 12/15] block: convert bdrv_debug_event in generated_co_wrapper
Emanuele Giuseppe Esposito
eesposit at redhat.com
Wed Nov 16 14:07:27 UTC 2022
BlockDriver->bdrv_debug_event is categorized as IO callback, and
it currently doesn't run in a coroutine.
This makes very difficult to add the graph rdlock, since the
callback traverses the block nodes graph.
Therefore use generated_co_wrapper to automatically
create a wrapper with the same name.
Unfortunately we cannot use a generated_co_wrapper_simple,
because the function is called by mixed functions that run both
in coroutine and non-coroutine context (for example blkdebug_open).
Signed-off-by: Emanuele Giuseppe Esposito <eesposit at redhat.com>
---
block.c | 4 +++-
block/io.c | 22 +++++++++++-----------
include/block/block-io.h | 7 +++++--
include/block/block_int-common.h | 4 +++-
4 files changed, 22 insertions(+), 15 deletions(-)
diff --git a/block.c b/block.c
index afc5735b82..a2e3550d5c 100644
--- a/block.c
+++ b/block.c
@@ -6331,9 +6331,11 @@ BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs)
return drv->bdrv_get_specific_stats(bs);
}
-void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event)
+void coroutine_fn bdrv_co_debug_event(BlockDriverState *bs, BlkdebugEvent event)
{
IO_CODE();
+ assert_bdrv_graph_readable();
+
if (!bs || !bs->drv || !bs->drv->bdrv_debug_event) {
return;
}
diff --git a/block/io.c b/block/io.c
index 88da9470c3..11d2c5dcde 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1227,7 +1227,7 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
goto err;
}
- bdrv_debug_event(bs, BLKDBG_COR_WRITE);
+ bdrv_co_debug_event(bs, BLKDBG_COR_WRITE);
if (drv->bdrv_co_pwrite_zeroes &&
buffer_is_zero(bounce_buffer, pnum)) {
/* FIXME: Should we (perhaps conditionally) be setting
@@ -1472,10 +1472,10 @@ static coroutine_fn int bdrv_padding_rmw_read(BdrvChild *child,
qemu_iovec_init_buf(&local_qiov, pad->buf, bytes);
if (pad->head) {
- bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_HEAD);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_RMW_HEAD);
}
if (pad->merge_reads && pad->tail) {
- bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
}
ret = bdrv_aligned_preadv(child, req, req->overlap_offset, bytes,
align, &local_qiov, 0, 0);
@@ -1483,10 +1483,10 @@ static coroutine_fn int bdrv_padding_rmw_read(BdrvChild *child,
return ret;
}
if (pad->head) {
- bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
}
if (pad->merge_reads && pad->tail) {
- bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
}
if (pad->merge_reads) {
@@ -1497,7 +1497,7 @@ static coroutine_fn int bdrv_padding_rmw_read(BdrvChild *child,
if (pad->tail) {
qemu_iovec_init_buf(&local_qiov, pad->tail_buf, align);
- bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
ret = bdrv_aligned_preadv(
child, req,
req->overlap_offset + req->overlap_bytes - align,
@@ -1505,7 +1505,7 @@ static coroutine_fn int bdrv_padding_rmw_read(BdrvChild *child,
if (ret < 0) {
return ret;
}
- bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
}
zero_mem:
@@ -1908,16 +1908,16 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
if (ret < 0) {
/* Do nothing, write notifier decided to fail this request */
} else if (flags & BDRV_REQ_ZERO_WRITE) {
- bdrv_debug_event(bs, BLKDBG_PWRITEV_ZERO);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_ZERO);
ret = bdrv_co_do_pwrite_zeroes(bs, offset, bytes, flags);
} else if (flags & BDRV_REQ_WRITE_COMPRESSED) {
ret = bdrv_driver_pwritev_compressed(bs, offset, bytes,
qiov, qiov_offset);
} else if (bytes <= max_transfer) {
- bdrv_debug_event(bs, BLKDBG_PWRITEV);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV);
ret = bdrv_driver_pwritev(bs, offset, bytes, qiov, qiov_offset, flags);
} else {
- bdrv_debug_event(bs, BLKDBG_PWRITEV);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV);
while (bytes_remaining) {
int num = MIN(bytes_remaining, max_transfer);
int local_flags = flags;
@@ -1940,7 +1940,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
bytes_remaining -= num;
}
}
- bdrv_debug_event(bs, BLKDBG_PWRITEV_DONE);
+ bdrv_co_debug_event(bs, BLKDBG_PWRITEV_DONE);
if (ret >= 0) {
ret = 0;
diff --git a/include/block/block-io.h b/include/block/block-io.h
index 497580fc28..176e3cc734 100644
--- a/include/block/block-io.h
+++ b/include/block/block-io.h
@@ -170,12 +170,15 @@ void *qemu_try_blockalign0(BlockDriverState *bs, size_t size);
void bdrv_enable_copy_on_read(BlockDriverState *bs);
void bdrv_disable_copy_on_read(BlockDriverState *bs);
-void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event);
+void coroutine_fn bdrv_co_debug_event(BlockDriverState *bs,
+ BlkdebugEvent event);
+void generated_co_wrapper bdrv_debug_event(BlockDriverState *bs,
+ BlkdebugEvent event);
#define BLKDBG_EVENT(child, evt) \
do { \
if (child) { \
- bdrv_debug_event(child->bs, evt); \
+ bdrv_co_debug_event(child->bs, evt); \
} \
} while (0)
diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 3e1eba518c..b509855c19 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -781,7 +781,9 @@ struct BlockDriver {
BdrvCheckResult *result,
BdrvCheckMode fix);
- void (*bdrv_debug_event)(BlockDriverState *bs, BlkdebugEvent event);
+ /* Called with graph rdlock taken. */
+ void coroutine_fn (*bdrv_debug_event)(BlockDriverState *bs,
+ BlkdebugEvent event);
/* io queue for linux-aio */
void (*bdrv_io_plug)(BlockDriverState *bs);
--
2.31.1
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