forked from Minki/linux
xen/blkback: Move the check for misaligned I/O higher.
We move it up higher to be in same loop that actually computes the sector number. This way, all of the code that deals with verifying that the request is correct is all done before we do any of the page mapping, I/O submission, etc. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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parent
1a95fe6e42
commit
976222e05e
@ -521,6 +521,13 @@ static void dispatch_rw_block_io(struct blkif_st *blkif,
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(req->u.rw.seg[i].last_sect < req->u.rw.seg[i].first_sect))
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goto fail_response;
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preq.nr_sects += seg[i].nsec;
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if (((int)preq.sector_number|(int)seg[i].nsec) &
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((bdev_logical_block_size(preq.bdev) >> 9) - 1)) {
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DPRINTK("Misaligned I/O request from domain %d",
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blkif->domid);
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goto fail_response;
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}
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}
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if (vbd_translate(&preq, blkif, operation) != 0) {
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@ -542,13 +549,6 @@ static void dispatch_rw_block_io(struct blkif_st *blkif,
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blkif_get(blkif);
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for (i = 0; i < nseg; i++) {
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if (((int)preq.sector_number|(int)seg[i].nsec) &
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((bdev_logical_block_size(preq.bdev) >> 9) - 1)) {
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DPRINTK("Misaligned I/O request from domain %d",
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blkif->domid);
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goto fail_put_bio;
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}
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while ((bio == NULL) ||
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(bio_add_page(bio,
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blkbk->pending_page(pending_req, i),
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