raid6check: Auto-repair mode

When calling raid6check in regular scanning mode, specifiying
"autorepair" as the last positional parameter will cause it
to automatically repair any single slot failes it identifies.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/19raid6auto-repair b/tests/19raid6auto-repair
new file mode 100644
index 00000000..6665458b
--- /dev/null
+++ b/tests/19raid6auto-repair
@@ -0,0 +1,43 @@
+number_of_disks=5
+chunksize_in_kib=512
+chunksize_in_b=$[chunksize_in_kib*1024]
+array_data_size_in_kib=$[chunksize_in_kib*(number_of_disks-2)*number_of_disks]
+array_data_size_in_b=$[array_data_size_in_kib*1024]
+devs="$dev0 $dev1 $dev2 $dev3 $dev4"
+
+# default 32 sectors
+data_offset_in_kib=$[32/2]
+
+# make a raid5 from a file
+dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$array_data_size_in_kib
+mdadm -CR $md0 -l6 -n$number_of_disks -c $chunksize_in_kib $devs
+dd if=/tmp/RandFile of=$md0 bs=1024 count=$array_data_size_in_kib
+blockdev --flushbufs $md0; sync
+check wait
+blockdev --flushbufs $devs; sync
+echo 3 > /proc/sys/vm/drop_caches
+cmp -s -n $array_data_size_in_b $md0 /tmp/RandFile || { echo sanity cmp failed ; exit 2; }
+
+# wipe out 5 chunks on each device
+dd if=/dev/urandom of=$dev0 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*0]
+dd if=/dev/urandom of=$dev1 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*5]
+dd if=/dev/urandom of=$dev2 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*10]
+dd if=/dev/urandom of=$dev3 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*15]
+dd if=/dev/urandom of=$dev4 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*20]
+
+blockdev --flushbufs $devs; sync
+echo 3 > /proc/sys/vm/drop_caches
+
+$dir/raid6check $md0 0 0 2>&1 | grep -qs "Error" || { echo should detect errors; exit 2; }
+
+$dir/raid6check $md0 0 0 autorepair > /dev/null || { echo repair failed; exit 2; }
+blockdev --flushbufs $md0 $devs; sync
+echo 3 > /proc/sys/vm/drop_caches
+
+$dir/raid6check $md0 0 0 2>&1 | grep -qs "Error" && { echo errors detected; exit 2; }
+cmp -s -n $array_data_size_in_b $md0 /tmp/RandFile || { echo cmp failed ; exit 2; }
+
+mdadm -S $md0
+udevadm settle
+blockdev --flushbufs $md0 $devs; sync
+echo 3 > /proc/sys/vm/drop_caches