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This fix isn't exhaustive but it fixes some obvious problems in the filters. Rich.

Thanks: Eric Blake for reporting the bug. --- filters/offset/offset.c | 4 +++- filters/partition/partition.c | 4 +++- filters/truncate/truncate.c | 8 +++++++- 3 files changed, 13 insertions(+), 3 deletions(-) diff --git a/filters/offset/offset.c b/filters/offset/offset.c index 24ccb4c..633a1c7 100644 --- a/filters/offset/offset.c +++ b/filters/offset/offset.c @@ -156,8 +156,10 @@ offset_extents (struct nbdkit_next_ops *next_ops, void *nxdata, for (i = 0; i < nbdkit_extents_count (extents2); ++i) { e = nbdkit_get_extent (extents2, i); e.offset -= offset; - if (nbdkit_ad...

.... > --- > filters/offset/offset.c | 4 +++- > filters/partition/partition.c | 4 +++- > filters/truncate/truncate.c | 8 +++++++- > 3 files changed, 13 insertions(+), 3 deletions(-) > > diff --git a/filters/offset/offset.c b/filters/offset/offset.c > index 24ccb4c..633a1c7 100644 > --- a/filters/offset/offset.c > +++ b/filters/offset/offset.c > @@ -156,8 +156,10 @@ offset_extents (struct nbdkit_next_ops *next_ops, void *nxdata, > for (i = 0; i < nbdkit_extents_count (extents2); ++i) { > e = nbdkit_get_extent (extents2, i); > e.offset...

Since v1: - rework .can_cache to be tri-state, with default of no advertisement (ripple effect through other patches) - add a lot more patches in order to round out filter support And in the meantime, Rich pushed NBD_CMD_CACHE support into libnbd, so in theory we now have a way to test cache commands through the entire stack. Eric Blake (24): server: Internal hooks for implementing