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| author | Paolo Bonzini <pbonzini@redhat.com> | 2011-10-20 13:16:23 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-10-21 17:34:14 +0200 |
| commit | e183ef75cc28d31addbb937a4680090495786944 (patch) | |
| tree | 780425093cc76f953a517f718550aa8febf58fd0 /block/vvfat.c | |
| parent | 2914caa088e3fbbdbfd73106af0cae49af1d472e (diff) | |
| download | qemu-e183ef75cc28d31addbb937a4680090495786944.zip qemu-e183ef75cc28d31addbb937a4680090495786944.tar.gz qemu-e183ef75cc28d31addbb937a4680090495786944.tar.bz2 | |
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 <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vvfat.c')
| -rw-r--r-- | block/vvfat.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/block/vvfat.c b/block/vvfat.c index 970cccf..e1fcdbc 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -2727,6 +2727,17 @@ DLOG(checkpoint()); return 0; } +static coroutine_fn int vvfat_co_write(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors) +{ + int ret; + BDRVVVFATState *s = bs->opaque; + qemu_co_mutex_lock(&s->lock); + ret = vvfat_write(bs, sector_num, buf, nb_sectors); + qemu_co_mutex_unlock(&s->lock); + return ret; +} + static int vvfat_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int* n) { @@ -2817,7 +2828,7 @@ static BlockDriver bdrv_vvfat = { .instance_size = sizeof(BDRVVVFATState), .bdrv_file_open = vvfat_open, .bdrv_read = vvfat_co_read, - .bdrv_write = vvfat_write, + .bdrv_write = vvfat_co_write, .bdrv_close = vvfat_close, .bdrv_is_allocated = vvfat_is_allocated, .protocol_name = "fat", |