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block: Advertise BDRV_REQ_NO_FALLBACK in filter drivers
Filter drivers that support .bdrv_co_pwrite_zeroes can safely advertise BDRV_REQ_NO_FALLBACK because they just forward the request flags to their child node. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Acked-by: Eric Blake <eblake@redhat.com>
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parent
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@ -401,7 +401,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
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bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
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(BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
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bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
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bs->file->bs->supported_zero_flags);
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ret = -EINVAL;
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@ -34,12 +34,11 @@ static int cor_open(BlockDriverState *bs, QDict *options, int flags,
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}
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bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
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(BDRV_REQ_FUA &
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bs->file->bs->supported_write_flags);
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(BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
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bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
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bs->file->bs->supported_zero_flags);
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
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bs->file->bs->supported_zero_flags);
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return 0;
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}
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@ -1548,7 +1548,8 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
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}
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mirror_top_bs->total_sectors = bs->total_sectors;
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mirror_top_bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED;
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mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED;
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mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
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BDRV_REQ_NO_FALLBACK;
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bs_opaque = g_new0(MirrorBDSOpaque, 1);
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mirror_top_bs->opaque = bs_opaque;
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bdrv_set_aio_context(mirror_top_bs, bdrv_get_aio_context(bs));
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@ -434,7 +434,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
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bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
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(BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
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bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
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bs->file->bs->supported_zero_flags);
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if (bs->probed && !bdrv_is_read_only(bs)) {
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