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a739ff3f54
Add support for correcting corrupted blocks using Reed-Solomon. This code uses RS(255, N) interleaved across data and hash blocks. Each error-correcting block covers N bytes evenly distributed across the combined total data, so that each byte is a maximum distance away from the others. This makes it possible to recover from several consecutive corrupted blocks with relatively small space overhead. In addition, using verity hashes to locate erasures nearly doubles the effectiveness of error correction. Being able to detect corrupted blocks also improves performance, because only corrupted blocks need to corrected. For a 2 GiB partition, RS(255, 253) (two parity bytes for each 253-byte block) can correct up to 16 MiB of consecutive corrupted blocks if erasures can be located, and 8 MiB if they cannot, with 16 MiB space overhead. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
71 lines
2.6 KiB
Makefile
71 lines
2.6 KiB
Makefile
#
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# Makefile for the kernel software RAID and LVM drivers.
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#
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dm-mod-y += dm.o dm-table.o dm-target.o dm-linear.o dm-stripe.o \
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dm-ioctl.o dm-io.o dm-kcopyd.o dm-sysfs.o dm-stats.o
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dm-multipath-y += dm-path-selector.o dm-mpath.o
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dm-snapshot-y += dm-snap.o dm-exception-store.o dm-snap-transient.o \
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dm-snap-persistent.o
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dm-mirror-y += dm-raid1.o
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dm-log-userspace-y \
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+= dm-log-userspace-base.o dm-log-userspace-transfer.o
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dm-thin-pool-y += dm-thin.o dm-thin-metadata.o
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dm-cache-y += dm-cache-target.o dm-cache-metadata.o dm-cache-policy.o
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dm-cache-mq-y += dm-cache-policy-mq.o
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dm-cache-smq-y += dm-cache-policy-smq.o
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dm-cache-cleaner-y += dm-cache-policy-cleaner.o
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dm-era-y += dm-era-target.o
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dm-verity-y += dm-verity-target.o
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md-mod-y += md.o bitmap.o
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raid456-y += raid5.o raid5-cache.o
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# Note: link order is important. All raid personalities
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# and must come before md.o, as they each initialise
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# themselves, and md.o may use the personalities when it
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# auto-initialised.
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obj-$(CONFIG_MD_LINEAR) += linear.o
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obj-$(CONFIG_MD_RAID0) += raid0.o
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obj-$(CONFIG_MD_RAID1) += raid1.o
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obj-$(CONFIG_MD_RAID10) += raid10.o
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obj-$(CONFIG_MD_RAID456) += raid456.o
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obj-$(CONFIG_MD_MULTIPATH) += multipath.o
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obj-$(CONFIG_MD_FAULTY) += faulty.o
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obj-$(CONFIG_MD_CLUSTER) += md-cluster.o
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obj-$(CONFIG_BCACHE) += bcache/
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obj-$(CONFIG_BLK_DEV_MD) += md-mod.o
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obj-$(CONFIG_BLK_DEV_DM) += dm-mod.o
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obj-$(CONFIG_BLK_DEV_DM_BUILTIN) += dm-builtin.o
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obj-$(CONFIG_DM_BUFIO) += dm-bufio.o
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obj-$(CONFIG_DM_BIO_PRISON) += dm-bio-prison.o
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obj-$(CONFIG_DM_CRYPT) += dm-crypt.o
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obj-$(CONFIG_DM_DELAY) += dm-delay.o
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obj-$(CONFIG_DM_FLAKEY) += dm-flakey.o
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obj-$(CONFIG_DM_MULTIPATH) += dm-multipath.o dm-round-robin.o
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obj-$(CONFIG_DM_MULTIPATH_QL) += dm-queue-length.o
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obj-$(CONFIG_DM_MULTIPATH_ST) += dm-service-time.o
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obj-$(CONFIG_DM_SWITCH) += dm-switch.o
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obj-$(CONFIG_DM_SNAPSHOT) += dm-snapshot.o
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obj-$(CONFIG_DM_PERSISTENT_DATA) += persistent-data/
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obj-$(CONFIG_DM_MIRROR) += dm-mirror.o dm-log.o dm-region-hash.o
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obj-$(CONFIG_DM_LOG_USERSPACE) += dm-log-userspace.o
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obj-$(CONFIG_DM_ZERO) += dm-zero.o
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obj-$(CONFIG_DM_RAID) += dm-raid.o
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obj-$(CONFIG_DM_THIN_PROVISIONING) += dm-thin-pool.o
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obj-$(CONFIG_DM_VERITY) += dm-verity.o
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obj-$(CONFIG_DM_CACHE) += dm-cache.o
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obj-$(CONFIG_DM_CACHE_MQ) += dm-cache-mq.o
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obj-$(CONFIG_DM_CACHE_SMQ) += dm-cache-smq.o
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obj-$(CONFIG_DM_CACHE_CLEANER) += dm-cache-cleaner.o
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obj-$(CONFIG_DM_ERA) += dm-era.o
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obj-$(CONFIG_DM_LOG_WRITES) += dm-log-writes.o
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ifeq ($(CONFIG_DM_UEVENT),y)
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dm-mod-objs += dm-uevent.o
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endif
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ifeq ($(CONFIG_DM_VERITY_FEC),y)
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dm-verity-objs += dm-verity-fec.o
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endif
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