diff --git a/block/block-backend.c b/block/block-backend.c
index 4476b61b8b..be7adce246 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -733,6 +733,7 @@ void monitor_remove_blk(BlockBackend *blk)
  */
 const char *blk_name(const BlockBackend *blk)
 {
+    IO_CODE();
     return blk->name ?: "";
 }
 
@@ -759,6 +760,7 @@ BlockBackend *blk_by_name(const char *name)
  */
 BlockDriverState *blk_bs(BlockBackend *blk)
 {
+    IO_CODE();
     return blk->root ? blk->root->bs : NULL;
 }
 
@@ -1009,6 +1011,7 @@ DeviceState *blk_get_attached_dev(BlockBackend *blk)
 char *blk_get_attached_dev_id(BlockBackend *blk)
 {
     DeviceState *dev = blk->dev;
+    IO_CODE();
 
     if (!dev) {
         return g_strdup("");
@@ -1171,6 +1174,7 @@ void blk_iostatus_enable(BlockBackend *blk)
  * enables it _and_ the VM is configured to stop on errors */
 bool blk_iostatus_is_enabled(const BlockBackend *blk)
 {
+    IO_CODE();
     return (blk->iostatus_enabled &&
            (blk->on_write_error == BLOCKDEV_ON_ERROR_ENOSPC ||
             blk->on_write_error == BLOCKDEV_ON_ERROR_STOP   ||
@@ -1199,6 +1203,7 @@ void blk_iostatus_reset(BlockBackend *blk)
 
 void blk_iostatus_set_err(BlockBackend *blk, int error)
 {
+    IO_CODE();
     assert(blk_iostatus_is_enabled(blk));
     if (blk->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
         blk->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE :
@@ -1208,16 +1213,19 @@ void blk_iostatus_set_err(BlockBackend *blk, int error)
 
 void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow)
 {
+    IO_CODE();
     blk->allow_write_beyond_eof = allow;
 }
 
 void blk_set_allow_aio_context_change(BlockBackend *blk, bool allow)
 {
+    IO_CODE();
     blk->allow_aio_context_change = allow;
 }
 
 void blk_set_disable_request_queuing(BlockBackend *blk, bool disable)
 {
+    IO_CODE();
     blk->disable_request_queuing = disable;
 }
 
@@ -1301,6 +1309,7 @@ int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
                                BdrvRequestFlags flags)
 {
     int ret;
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_co_do_preadv(blk, offset, bytes, qiov, flags);
@@ -1352,6 +1361,7 @@ int coroutine_fn blk_co_pwritev_part(BlockBackend *blk, int64_t offset,
                                      BdrvRequestFlags flags)
 {
     int ret;
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_co_do_pwritev_part(blk, offset, bytes, qiov, qiov_offset, flags);
@@ -1364,6 +1374,7 @@ int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
                                 int64_t bytes, QEMUIOVector *qiov,
                                 BdrvRequestFlags flags)
 {
+    IO_OR_GS_CODE();
     return blk_co_pwritev_part(blk, offset, bytes, qiov, 0, flags);
 }
 
@@ -1392,6 +1403,7 @@ typedef struct BlkRwCo {
 int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
                       int64_t bytes, BdrvRequestFlags flags)
 {
+    IO_OR_GS_CODE();
     return blk_pwritev_part(blk, offset, bytes, NULL, 0,
                             flags | BDRV_REQ_ZERO_WRITE);
 }
@@ -1404,11 +1416,13 @@ int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags)
 
 void blk_inc_in_flight(BlockBackend *blk)
 {
+    IO_CODE();
     qatomic_inc(&blk->in_flight);
 }
 
 void blk_dec_in_flight(BlockBackend *blk)
 {
+    IO_CODE();
     qatomic_dec(&blk->in_flight);
     aio_wait_kick();
 }
@@ -1427,6 +1441,7 @@ BlockAIOCB *blk_abort_aio_request(BlockBackend *blk,
                                   void *opaque, int ret)
 {
     struct BlockBackendAIOCB *acb;
+    IO_CODE();
 
     blk_inc_in_flight(blk);
     acb = blk_aio_get(&block_backend_aiocb_info, blk, cb, opaque);
@@ -1534,6 +1549,7 @@ BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
                                   int64_t bytes, BdrvRequestFlags flags,
                                   BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     return blk_aio_prwv(blk, offset, bytes, NULL, blk_aio_write_entry,
                         flags | BDRV_REQ_ZERO_WRITE, cb, opaque);
 }
@@ -1542,6 +1558,7 @@ int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int bytes)
 {
     int ret;
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_do_preadv(blk, offset, bytes, &qiov, 0);
@@ -1555,6 +1572,7 @@ int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int bytes,
 {
     int ret;
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
+    IO_OR_GS_CODE();
 
     ret = blk_pwritev_part(blk, offset, bytes, &qiov, 0, flags);
 
@@ -1563,6 +1581,7 @@ int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int bytes,
 
 int64_t blk_getlength(BlockBackend *blk)
 {
+    IO_CODE();
     if (!blk_is_available(blk)) {
         return -ENOMEDIUM;
     }
@@ -1572,6 +1591,7 @@ int64_t blk_getlength(BlockBackend *blk)
 
 void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr)
 {
+    IO_CODE();
     if (!blk_bs(blk)) {
         *nb_sectors_ptr = 0;
     } else {
@@ -1581,6 +1601,7 @@ void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr)
 
 int64_t blk_nb_sectors(BlockBackend *blk)
 {
+    IO_CODE();
     if (!blk_is_available(blk)) {
         return -ENOMEDIUM;
     }
@@ -1592,6 +1613,7 @@ BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset,
                            QEMUIOVector *qiov, BdrvRequestFlags flags,
                            BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     assert((uint64_t)qiov->size <= INT64_MAX);
     return blk_aio_prwv(blk, offset, qiov->size, qiov,
                         blk_aio_read_entry, flags, cb, opaque);
@@ -1601,6 +1623,7 @@ BlockAIOCB *blk_aio_pwritev(BlockBackend *blk, int64_t offset,
                             QEMUIOVector *qiov, BdrvRequestFlags flags,
                             BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     assert((uint64_t)qiov->size <= INT64_MAX);
     return blk_aio_prwv(blk, offset, qiov->size, qiov,
                         blk_aio_write_entry, flags, cb, opaque);
@@ -1614,6 +1637,7 @@ void blk_aio_cancel(BlockAIOCB *acb)
 
 void blk_aio_cancel_async(BlockAIOCB *acb)
 {
+    IO_CODE();
     bdrv_aio_cancel_async(acb);
 }
 
@@ -1633,6 +1657,7 @@ blk_co_do_ioctl(BlockBackend *blk, unsigned long int req, void *buf)
 int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf)
 {
     int ret;
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_do_ioctl(blk, req, buf);
@@ -1654,6 +1679,7 @@ static void blk_aio_ioctl_entry(void *opaque)
 BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
                           BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     return blk_aio_prwv(blk, req, 0, buf, blk_aio_ioctl_entry, 0, cb, opaque);
 }
 
@@ -1686,6 +1712,7 @@ BlockAIOCB *blk_aio_pdiscard(BlockBackend *blk,
                              int64_t offset, int64_t bytes,
                              BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     return blk_aio_prwv(blk, offset, bytes, NULL, blk_aio_pdiscard_entry, 0,
                         cb, opaque);
 }
@@ -1694,6 +1721,7 @@ int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
                                  int64_t bytes)
 {
     int ret;
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_co_do_pdiscard(blk, offset, bytes);
@@ -1705,6 +1733,7 @@ int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
 int blk_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes)
 {
     int ret;
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_do_pdiscard(blk, offset, bytes);
@@ -1737,12 +1766,14 @@ static void blk_aio_flush_entry(void *opaque)
 BlockAIOCB *blk_aio_flush(BlockBackend *blk,
                           BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     return blk_aio_prwv(blk, 0, 0, NULL, blk_aio_flush_entry, 0, cb, opaque);
 }
 
 int coroutine_fn blk_co_flush(BlockBackend *blk)
 {
     int ret;
+    IO_OR_GS_CODE();
 
     blk_inc_in_flight(blk);
     ret = blk_co_do_flush(blk);
@@ -1814,6 +1845,7 @@ void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
 
 BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read)
 {
+    IO_CODE();
     return is_read ? blk->on_read_error : blk->on_write_error;
 }
 
@@ -1821,6 +1853,7 @@ BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
                                       int error)
 {
     BlockdevOnError on_err = blk_get_on_error(blk, is_read);
+    IO_CODE();
 
     switch (on_err) {
     case BLOCKDEV_ON_ERROR_ENOSPC:
@@ -1860,6 +1893,7 @@ void blk_error_action(BlockBackend *blk, BlockErrorAction action,
                       bool is_read, int error)
 {
     assert(error >= 0);
+    IO_CODE();
 
     if (action == BLOCK_ERROR_ACTION_STOP) {
         /* First set the iostatus, so that "info block" returns an iostatus
@@ -1906,6 +1940,7 @@ bool blk_supports_write_perm(BlockBackend *blk)
  */
 bool blk_is_writable(BlockBackend *blk)
 {
+    IO_CODE();
     return blk->perm & BLK_PERM_WRITE;
 }
 
@@ -1923,6 +1958,7 @@ bool blk_is_sg(BlockBackend *blk)
 
 bool blk_enable_write_cache(BlockBackend *blk)
 {
+    IO_CODE();
     return blk->enable_write_cache;
 }
 
@@ -1948,18 +1984,21 @@ void blk_activate(BlockBackend *blk, Error **errp)
 bool blk_is_inserted(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
+    IO_CODE();
 
     return bs && bdrv_is_inserted(bs);
 }
 
 bool blk_is_available(BlockBackend *blk)
 {
+    IO_CODE();
     return blk_is_inserted(blk) && !blk_dev_is_tray_open(blk);
 }
 
 void blk_lock_medium(BlockBackend *blk, bool locked)
 {
     BlockDriverState *bs = blk_bs(blk);
+    IO_CODE();
 
     if (bs) {
         bdrv_lock_medium(bs, locked);
@@ -1970,6 +2009,7 @@ void blk_eject(BlockBackend *blk, bool eject_flag)
 {
     BlockDriverState *bs = blk_bs(blk);
     char *id;
+    IO_CODE();
 
     if (bs) {
         bdrv_eject(bs, eject_flag);
@@ -1999,6 +2039,7 @@ int blk_get_flags(BlockBackend *blk)
 uint32_t blk_get_request_alignment(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
+    IO_CODE();
     return bs ? bs->bl.request_alignment : BDRV_SECTOR_SIZE;
 }
 
@@ -2007,6 +2048,7 @@ uint64_t blk_get_max_hw_transfer(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
     uint64_t max = INT_MAX;
+    IO_CODE();
 
     if (bs) {
         max = MIN_NON_ZERO(max, bs->bl.max_hw_transfer);
@@ -2020,6 +2062,7 @@ uint32_t blk_get_max_transfer(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
     uint32_t max = INT_MAX;
+    IO_CODE();
 
     if (bs) {
         max = MIN_NON_ZERO(max, bs->bl.max_transfer);
@@ -2029,27 +2072,32 @@ uint32_t blk_get_max_transfer(BlockBackend *blk)
 
 int blk_get_max_hw_iov(BlockBackend *blk)
 {
+    IO_CODE();
     return MIN_NON_ZERO(blk->root->bs->bl.max_hw_iov,
                         blk->root->bs->bl.max_iov);
 }
 
 int blk_get_max_iov(BlockBackend *blk)
 {
+    IO_CODE();
     return blk->root->bs->bl.max_iov;
 }
 
 void blk_set_guest_block_size(BlockBackend *blk, int align)
 {
+    IO_CODE();
     blk->guest_block_size = align;
 }
 
 void *blk_try_blockalign(BlockBackend *blk, size_t size)
 {
+    IO_CODE();
     return qemu_try_blockalign(blk ? blk_bs(blk) : NULL, size);
 }
 
 void *blk_blockalign(BlockBackend *blk, size_t size)
 {
+    IO_CODE();
     return qemu_blockalign(blk ? blk_bs(blk) : NULL, size);
 }
 
@@ -2098,6 +2146,7 @@ void blk_op_unblock_all(BlockBackend *blk, Error *reason)
 AioContext *blk_get_aio_context(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
+    IO_CODE();
 
     if (bs) {
         AioContext *ctx = bdrv_get_aio_context(blk_bs(blk));
@@ -2243,6 +2292,7 @@ void blk_add_insert_bs_notifier(BlockBackend *blk, Notifier *notify)
 void blk_io_plug(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
+    IO_CODE();
 
     if (bs) {
         bdrv_io_plug(bs);
@@ -2252,6 +2302,7 @@ void blk_io_plug(BlockBackend *blk)
 void blk_io_unplug(BlockBackend *blk)
 {
     BlockDriverState *bs = blk_bs(blk);
+    IO_CODE();
 
     if (bs) {
         bdrv_io_unplug(bs);
@@ -2260,18 +2311,21 @@ void blk_io_unplug(BlockBackend *blk)
 
 BlockAcctStats *blk_get_stats(BlockBackend *blk)
 {
+    IO_CODE();
     return &blk->stats;
 }
 
 void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
                   BlockCompletionFunc *cb, void *opaque)
 {
+    IO_CODE();
     return qemu_aio_get(aiocb_info, blk_bs(blk), cb, opaque);
 }
 
 int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
                                       int64_t bytes, BdrvRequestFlags flags)
 {
+    IO_OR_GS_CODE();
     return blk_co_pwritev(blk, offset, bytes, NULL,
                           flags | BDRV_REQ_ZERO_WRITE);
 }
@@ -2280,6 +2334,7 @@ int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
                           int64_t bytes)
 {
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
+    IO_OR_GS_CODE();
     return blk_pwritev_part(blk, offset, bytes, &qiov, 0,
                             BDRV_REQ_WRITE_COMPRESSED);
 }
@@ -2287,6 +2342,7 @@ int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
 int blk_truncate(BlockBackend *blk, int64_t offset, bool exact,
                  PreallocMode prealloc, BdrvRequestFlags flags, Error **errp)
 {
+    IO_OR_GS_CODE();
     if (!blk_is_available(blk)) {
         error_setg(errp, "No medium inserted");
         return -ENOMEDIUM;
@@ -2530,6 +2586,8 @@ int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
                                    BdrvRequestFlags write_flags)
 {
     int r;
+    IO_CODE();
+
     r = blk_check_byte_request(blk_in, off_in, bytes);
     if (r) {
         return r;
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h
index 045fe97714..6517c39295 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -121,6 +121,7 @@ static inline int coroutine_fn blk_co_pread(BlockBackend *blk, int64_t offset,
                                             BdrvRequestFlags flags)
 {
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
+    IO_OR_GS_CODE();
 
     assert(bytes <= SIZE_MAX);
 
@@ -132,6 +133,7 @@ static inline int coroutine_fn blk_co_pwrite(BlockBackend *blk, int64_t offset,
                                              BdrvRequestFlags flags)
 {
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
+    IO_OR_GS_CODE();
 
     assert(bytes <= SIZE_MAX);