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(-) -- 1.7.9.5
