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.
v4->v5: - Added check for (a != 0 instead of !!a) [Max] and some comments
[Eric]
- Correctly limited max_transfer_length to INT_MAX in Patch 3 [Max]
- Added Patch 5 and Patch 6.
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 (6):
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/iscsi: limit to INT_MAX throughout iscsi_refresh_limits
block/iscsi: check for oversized requests
block.c | 9 +++++++++
block/iscsi.c | 49 ++++++++++++++++++++++++++++++++++-----------
include/block/block_int.h | 3 +++
include/qemu/osdep.h | 6 ++++++
4 files changed, 55 insertions(+), 12 deletions(-)
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1.7.9.5
