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fa8db4948f
bio_trim() has an early return, which makes it _not_ idempotent, if the
offset is 0 and the bio's bi_size already matches the requested size.
Prior to DM, all users of bio_trim() were fine with this. But DM has
exposed the fact that bio_trim()'s early return is incompatible with a
cloned bio whose integrity payload must be trimmed via
bio_integrity_trim().
Fix this by reverting DM back to doing the equivalent of bio_trim() but
in an idempotent manner (so bio_integrity_trim is always performed).
Follow-on work is needed to assess what benefit bio_trim()'s early
return is providing to its existing callers.
Reported-by: Milan Broz <gmazyland@gmail.com>
Fixes:
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.. | ||
bcache | ||
persistent-data | ||
dm-bio-prison-v1.c | ||
dm-bio-prison-v1.h | ||
dm-bio-prison-v2.c | ||
dm-bio-prison-v2.h | ||
dm-bio-record.h | ||
dm-bufio.c | ||
dm-builtin.c | ||
dm-cache-background-tracker.c | ||
dm-cache-background-tracker.h | ||
dm-cache-block-types.h | ||
dm-cache-metadata.c | ||
dm-cache-metadata.h | ||
dm-cache-policy-internal.h | ||
dm-cache-policy-smq.c | ||
dm-cache-policy.c | ||
dm-cache-policy.h | ||
dm-cache-target.c | ||
dm-core.h | ||
dm-crypt.c | ||
dm-delay.c | ||
dm-era-target.c | ||
dm-exception-store.c | ||
dm-exception-store.h | ||
dm-flakey.c | ||
dm-integrity.c | ||
dm-io.c | ||
dm-ioctl.c | ||
dm-kcopyd.c | ||
dm-linear.c | ||
dm-log-userspace-base.c | ||
dm-log-userspace-transfer.c | ||
dm-log-userspace-transfer.h | ||
dm-log-writes.c | ||
dm-log.c | ||
dm-mpath.c | ||
dm-mpath.h | ||
dm-path-selector.c | ||
dm-path-selector.h | ||
dm-queue-length.c | ||
dm-raid1.c | ||
dm-raid.c | ||
dm-region-hash.c | ||
dm-round-robin.c | ||
dm-rq.c | ||
dm-rq.h | ||
dm-service-time.c | ||
dm-snap-persistent.c | ||
dm-snap-transient.c | ||
dm-snap.c | ||
dm-stats.c | ||
dm-stats.h | ||
dm-stripe.c | ||
dm-switch.c | ||
dm-sysfs.c | ||
dm-table.c | ||
dm-target.c | ||
dm-thin-metadata.c | ||
dm-thin-metadata.h | ||
dm-thin.c | ||
dm-uevent.c | ||
dm-uevent.h | ||
dm-unstripe.c | ||
dm-verity-fec.c | ||
dm-verity-fec.h | ||
dm-verity-target.c | ||
dm-verity.h | ||
dm-writecache.c | ||
dm-zero.c | ||
dm-zoned-metadata.c | ||
dm-zoned-reclaim.c | ||
dm-zoned-target.c | ||
dm-zoned.h | ||
dm.c | ||
dm.h | ||
Kconfig | ||
Makefile | ||
md-bitmap.c | ||
md-bitmap.h | ||
md-cluster.c | ||
md-cluster.h | ||
md-faulty.c | ||
md-linear.c | ||
md-linear.h | ||
md-multipath.c | ||
md-multipath.h | ||
md.c | ||
md.h | ||
raid0.c | ||
raid0.h | ||
raid1-10.c | ||
raid1.c | ||
raid1.h | ||
raid5-cache.c | ||
raid5-log.h | ||
raid5-ppl.c | ||
raid5.c | ||
raid5.h | ||
raid10.c | ||
raid10.h |