From e183ef75cc28d31addbb937a4680090495786944 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 20 Oct 2011 13:16:23 +0200 Subject: block: take lock around bdrv_write implementations This does the first part of the conversion to coroutines, by wrapping bdrv_write implementations to take the mutex. Drivers that implement bdrv_write rather than bdrv_co_writev can then benefit from asynchronous operation (at least if the underlying protocol supports it, which is not the case for raw-win32), even though they still operate with a bounce buffer. Signed-off-by: Paolo Bonzini Signed-off-by: Kevin Wolf --- block/vpc.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'block/vpc.c') diff --git a/block/vpc.c b/block/vpc.c index 0941533f43..74ca642605 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -456,6 +456,17 @@ static int vpc_write(BlockDriverState *bs, int64_t sector_num, return 0; } +static coroutine_fn int vpc_co_write(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors) +{ + int ret; + BDRVVPCState *s = bs->opaque; + qemu_co_mutex_lock(&s->lock); + ret = vpc_write(bs, sector_num, buf, nb_sectors); + qemu_co_mutex_unlock(&s->lock); + return ret; +} + static int vpc_flush(BlockDriverState *bs) { return bdrv_flush(bs->file); @@ -653,7 +664,7 @@ static BlockDriver bdrv_vpc = { .bdrv_probe = vpc_probe, .bdrv_open = vpc_open, .bdrv_read = vpc_co_read, - .bdrv_write = vpc_write, + .bdrv_write = vpc_co_write, .bdrv_flush = vpc_flush, .bdrv_close = vpc_close, .bdrv_create = vpc_create, -- cgit v1.2.1