block: Convert bdrv_lock_medium() to co_wrapper
bdrv_lock_medium() is categorized as an I/O function, and it currently
doesn't run in a coroutine. We should let it take a graph rdlock since
it traverses the block nodes graph, which however is only possible in a
coroutine.
The only caller of this function is blk_lock_medium(). Therefore make
blk_lock_medium() a co_wrapper, so that it always creates a new
coroutine, and then make bdrv_lock_medium() a coroutine_fn where the
lock can be taken.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230113204212.359076-13-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block.c b/block.c
index 61ece82..bd016ef 100644
--- a/block.c
+++ b/block.c
@@ -6835,14 +6835,14 @@
* Lock or unlock the media (if it is locked, the user won't be able
* to eject it manually).
*/
-void bdrv_lock_medium(BlockDriverState *bs, bool locked)
+void coroutine_fn bdrv_co_lock_medium(BlockDriverState *bs, bool locked)
{
BlockDriver *drv = bs->drv;
IO_CODE();
trace_bdrv_lock_medium(bs, locked);
- if (drv && drv->bdrv_lock_medium) {
- drv->bdrv_lock_medium(bs, locked);
+ if (drv && drv->bdrv_co_lock_medium) {
+ drv->bdrv_co_lock_medium(bs, locked);
}
}
diff --git a/block/block-backend.c b/block/block-backend.c
index 7eaafc8..ef512f7 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1999,13 +1999,13 @@
return blk_is_inserted(blk) && !blk_dev_is_tray_open(blk);
}
-void blk_lock_medium(BlockBackend *blk, bool locked)
+void coroutine_fn blk_co_lock_medium(BlockBackend *blk, bool locked)
{
BlockDriverState *bs = blk_bs(blk);
IO_CODE();
if (bs) {
- bdrv_lock_medium(bs, locked);
+ bdrv_co_lock_medium(bs, locked);
}
}
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 4204931..3280eb2 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -223,9 +223,9 @@
}
-static void cor_lock_medium(BlockDriverState *bs, bool locked)
+static void coroutine_fn cor_co_lock_medium(BlockDriverState *bs, bool locked)
{
- bdrv_lock_medium(bs->file->bs, locked);
+ bdrv_co_lock_medium(bs->file->bs, locked);
}
@@ -259,7 +259,7 @@
.bdrv_co_pwritev_compressed = cor_co_pwritev_compressed,
.bdrv_co_eject = cor_co_eject,
- .bdrv_lock_medium = cor_lock_medium,
+ .bdrv_co_lock_medium = cor_co_lock_medium,
.has_variable_length = true,
.is_filter = true,
diff --git a/block/file-posix.c b/block/file-posix.c
index a223dba..fa6aeea 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -3778,7 +3778,7 @@
}
}
-static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
+static void coroutine_fn cdrom_co_lock_medium(BlockDriverState *bs, bool locked)
{
BDRVRawState *s = bs->opaque;
@@ -3824,7 +3824,7 @@
/* removable device support */
.bdrv_co_is_inserted = cdrom_co_is_inserted,
.bdrv_co_eject = cdrom_co_eject,
- .bdrv_lock_medium = cdrom_lock_medium,
+ .bdrv_co_lock_medium = cdrom_co_lock_medium,
/* generic scsi device */
.bdrv_co_ioctl = hdev_co_ioctl,
@@ -3906,7 +3906,7 @@
cdrom_reopen(bs);
}
-static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
+static void coroutine_fn cdrom_co_lock_medium(BlockDriverState *bs, bool locked)
{
BDRVRawState *s = bs->opaque;
@@ -3953,7 +3953,7 @@
/* removable device support */
.bdrv_co_is_inserted = cdrom_co_is_inserted,
.bdrv_co_eject = cdrom_co_eject,
- .bdrv_lock_medium = cdrom_lock_medium,
+ .bdrv_co_lock_medium = cdrom_co_lock_medium,
};
#endif /* __FreeBSD__ */
diff --git a/block/filter-compress.c b/block/filter-compress.c
index 1e869bd..2e2a659 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -124,9 +124,10 @@
}
-static void compress_lock_medium(BlockDriverState *bs, bool locked)
+static void coroutine_fn
+compress_co_lock_medium(BlockDriverState *bs, bool locked)
{
- bdrv_lock_medium(bs->file->bs, locked);
+ bdrv_co_lock_medium(bs->file->bs, locked);
}
@@ -145,7 +146,7 @@
.bdrv_refresh_limits = compress_refresh_limits,
.bdrv_co_eject = compress_co_eject,
- .bdrv_lock_medium = compress_lock_medium,
+ .bdrv_co_lock_medium = compress_co_lock_medium,
.has_variable_length = true,
.is_filter = true,
diff --git a/block/raw-format.c b/block/raw-format.c
index 21aa7fd..0dc469b 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -410,9 +410,9 @@
bdrv_co_eject(bs->file->bs, eject_flag);
}
-static void raw_lock_medium(BlockDriverState *bs, bool locked)
+static void coroutine_fn raw_co_lock_medium(BlockDriverState *bs, bool locked)
{
- bdrv_lock_medium(bs->file->bs, locked);
+ bdrv_co_lock_medium(bs->file->bs, locked);
}
static int coroutine_fn raw_co_ioctl(BlockDriverState *bs,
@@ -632,7 +632,7 @@
.bdrv_probe_blocksizes = &raw_probe_blocksizes,
.bdrv_probe_geometry = &raw_probe_geometry,
.bdrv_co_eject = &raw_co_eject,
- .bdrv_lock_medium = &raw_lock_medium,
+ .bdrv_co_lock_medium = &raw_co_lock_medium,
.bdrv_co_ioctl = &raw_co_ioctl,
.create_opts = &raw_create_opts,
.bdrv_has_zero_init = &raw_has_zero_init,
diff --git a/include/block/block-io.h b/include/block/block-io.h
index ecf62cd..a1823ee 100644
--- a/include/block/block-io.h
+++ b/include/block/block-io.h
@@ -146,7 +146,7 @@
bool coroutine_fn bdrv_co_is_inserted(BlockDriverState *bs);
bool co_wrapper bdrv_is_inserted(BlockDriverState *bs);
-void bdrv_lock_medium(BlockDriverState *bs, bool locked);
+void coroutine_fn bdrv_co_lock_medium(BlockDriverState *bs, bool locked);
void coroutine_fn bdrv_co_eject(BlockDriverState *bs, bool eject_flag);
const char *bdrv_get_format_name(BlockDriverState *bs);
diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 4142966..64b05fd 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -709,7 +709,7 @@
/* removable device specific */
bool coroutine_fn (*bdrv_co_is_inserted)(BlockDriverState *bs);
void coroutine_fn (*bdrv_co_eject)(BlockDriverState *bs, bool eject_flag);
- void (*bdrv_lock_medium)(BlockDriverState *bs, bool locked);
+ void coroutine_fn (*bdrv_co_lock_medium)(BlockDriverState *bs, bool locked);
/* to control generic scsi devices */
BlockAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs,
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h
index 3db1030..b1196ab 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -59,7 +59,9 @@
bool co_wrapper_mixed blk_is_inserted(BlockBackend *blk);
bool blk_is_available(BlockBackend *blk);
-void blk_lock_medium(BlockBackend *blk, bool locked);
+
+void coroutine_fn blk_co_lock_medium(BlockBackend *blk, bool locked);
+void co_wrapper blk_lock_medium(BlockBackend *blk, bool locked);
void coroutine_fn blk_co_eject(BlockBackend *blk, bool eject_flag);
void co_wrapper blk_eject(BlockBackend *blk, bool eject_flag);
