[Qemu-devel] [PATCHv4 0/4] introduce max_transfer_length

[Peter Lieven <pl@kamp.de>]

This series adds the basics for introducing a maximum transfer length
to the block layer. Its main purpose is currently avoiding that
a multiwrite_merge exceeds the max_xfer_len of an attached iSCSI LUN.
This is a required bug fix.

Splitting up requests according to the max_transfer_length will follow
in a later series.

v3->v4: introduce MIN_NON_ZERO to correctly calculate minimum of 2 limits.
v2->v3: remove Patch 2 completely [Paolo]
v1->v2: do not throw errors but generate trace events in Patch 2 [Paolo]

Peter Lieven (4):
  util: introduce MIN_NON_ZERO
  BlockLimits: introduce max_transfer_length
  block/iscsi: set max_transfer_length
  block: avoid creating oversized writes in multiwrite_merge

 block.c                   |    9 +++++++++
 block/iscsi.c             |   12 ++++++++++--
 include/block/block_int.h |    3 +++
 include/qemu/osdep.h      |    4 ++++
 4 files changed, 26 insertions(+), 2 deletions(-)

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1.7.9.5