diff options
| author | Eric Blake <eblake@redhat.com> | 2016-07-15 12:32:04 -0600 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2016-07-20 14:11:54 +0100 |
| commit | 6bd01f14dbef06dc22c0400f12dfbef06ab6b766 (patch) | |
| tree | f30d88eeb90c14ec7853e37aa9ea75a201932cd0 | |
| parent | 1e2a77a851b3369799272c8e77c07995a1a2e579 (diff) | |
| download | focaccia-qemu-6bd01f14dbef06dc22c0400f12dfbef06ab6b766.tar.gz focaccia-qemu-6bd01f14dbef06dc22c0400f12dfbef06ab6b766.zip | |
iscsi: Rely on block layer to break up large requests
Now that the block layer honors max_request, we don't need to bother with an EINVAL on overlarge requests, but can instead assert that requests are well-behaved. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1468607524-19021-7-git-send-email-eblake@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | block/iscsi.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/block/iscsi.c b/block/iscsi.c index 129c3afa68..5602abdc6a 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -586,11 +586,8 @@ iscsi_co_writev_flags(BlockDriverState *bs, int64_t sector_num, int nb_sectors, return -EINVAL; } - if (bs->bl.max_transfer && - nb_sectors << BDRV_SECTOR_BITS > bs->bl.max_transfer) { - error_report("iSCSI Error: Write of %d sectors exceeds max_xfer_len " - "of %" PRIu32 " bytes", nb_sectors, bs->bl.max_transfer); - return -EINVAL; + if (bs->bl.max_transfer) { + assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer); } lba = sector_qemu2lun(sector_num, iscsilun); @@ -754,11 +751,8 @@ static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, return -EINVAL; } - if (bs->bl.max_transfer && - nb_sectors << BDRV_SECTOR_BITS > bs->bl.max_transfer) { - error_report("iSCSI Error: Read of %d sectors exceeds max_xfer_len " - "of %" PRIu32 " bytes", nb_sectors, bs->bl.max_transfer); - return -EINVAL; + if (bs->bl.max_transfer) { + assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer); } /* if cache.direct is off and we have a valid entry in our allocation map |