diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2023-04-12 13:26:06 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-04-12 18:26:51 +0200 |
| commit | 3fe64abcde55cf6f4ea5883106301baad219a7cc (patch) | |
| tree | 0818e509bbc09b111ff5809d37850312712666a7 /block | |
| parent | abb02ce0e76a8e00026699a863ab2d11d88f56d4 (diff) | |
block/nfs: do not poll within a coroutine
Since the former nfs_get_allocated_file_size is now a coroutine
function, it must suspend rather than poll. Switch BDRV_POLL_WHILE()
to a qemu_coroutine_yield() loop and schedule nfs_co_generic_bh_cb()
in place of the call to bdrv_wakeup().
Fixes: 82618d7bc341 ("block: Convert bdrv_get_allocated_file_size() to co_wrapper", 2023-02-01)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230412112606.80983-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/nfs.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/block/nfs.c b/block/nfs.c index 351dc6ec8d..006045d71a 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -726,10 +726,8 @@ nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data, if (task->ret < 0) { error_report("NFS Error: %s", nfs_get_error(nfs)); } - - /* Set task->complete before reading bs->wakeup. */ - qatomic_mb_set(&task->complete, 1); - bdrv_wakeup(task->bs); + replay_bh_schedule_oneshot_event(task->client->aio_context, + nfs_co_generic_bh_cb, task); } static int64_t coroutine_fn nfs_co_get_allocated_file_size(BlockDriverState *bs) @@ -743,15 +741,19 @@ static int64_t coroutine_fn nfs_co_get_allocated_file_size(BlockDriverState *bs) return client->st_blocks * 512; } - task.bs = bs; + nfs_co_init_task(bs, &task); task.st = &st; - if (nfs_fstat_async(client->context, client->fh, nfs_get_allocated_file_size_cb, - &task) != 0) { - return -ENOMEM; - } + WITH_QEMU_LOCK_GUARD(&client->mutex) { + if (nfs_fstat_async(client->context, client->fh, nfs_get_allocated_file_size_cb, + &task) != 0) { + return -ENOMEM; + } - nfs_set_events(client); - BDRV_POLL_WHILE(bs, !task.complete); + nfs_set_events(client); + } + while (!task.complete) { + qemu_coroutine_yield(); + } return (task.ret < 0 ? task.ret : st.st_blocks * 512); } |