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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0fcb04d593
When establishing a thin device's discard limits we cannot rely on the
underlying thin-pool device's discard capabilities (which are inherited
from the thin-pool's underlying data device) given that DM thin devices
must provide discard support even when the thin-pool's underlying data
device doesn't support discards.
Users were exposed to this thin device discard limits regression if
their thin-pool's underlying data device does _not_ support discards.
This regression caused all upper-layers that called the
blkdev_issue_discard() interface to not be able to issue discards to
thin devices (because discard_granularity was 0). This regression
wasn't caught earlier because the device-mapper-test-suite's extensive
'thin-provisioning' discard tests are only ever performed against
thin-pool's with data devices that support discards.
Fix is to have thin_io_hints() test the pool's 'discard_enabled' feature
rather than inferring whether or not a thin device's discard support
should be enabled by looking at the thin-pool's discard_granularity.
Fixes:
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.. | ||
bcache | ||
persistent-data | ||
bitmap.c | ||
bitmap.h | ||
dm-bio-prison.c | ||
dm-bio-prison.h | ||
dm-bio-record.h | ||
dm-bufio.c | ||
dm-bufio.h | ||
dm-builtin.c | ||
dm-cache-block-types.h | ||
dm-cache-metadata.c | ||
dm-cache-metadata.h | ||
dm-cache-policy-cleaner.c | ||
dm-cache-policy-internal.h | ||
dm-cache-policy-mq.c | ||
dm-cache-policy-smq.c | ||
dm-cache-policy.c | ||
dm-cache-policy.h | ||
dm-cache-target.c | ||
dm-crypt.c | ||
dm-delay.c | ||
dm-era-target.c | ||
dm-exception-store.c | ||
dm-exception-store.h | ||
dm-flakey.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-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-verity.c | ||
dm-zero.c | ||
dm.c | ||
dm.h | ||
faulty.c | ||
Kconfig | ||
linear.c | ||
linear.h | ||
Makefile | ||
md-cluster.c | ||
md-cluster.h | ||
md.c | ||
md.h | ||
multipath.c | ||
multipath.h | ||
raid0.c | ||
raid0.h | ||
raid1.c | ||
raid1.h | ||
raid5-cache.c | ||
raid5.c | ||
raid5.h | ||
raid10.c | ||
raid10.h |