NeilBrown: Test different r5/r6 layouts.

[Martin F. Krafft]

Module: mdadm
Branch: master
Commit: ba6241244b010bcd1c47940357ee3a369b0dcac4
URL:    http://git.debian.org/?p=pkg-mdadm/mdadm.git;a=commit;h=ba6241244b010bcd1c47940357ee3a369b0dcac4

Author: NeilBrown <neilb at suse.de>
Date:   Fri Oct 16 17:50:07 2009 +1100

Test different r5/r6 layouts.

Make sure kernel and restripe agree on all different layouts.

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

---

 test                    |    1 +
 tests/01raid6integ      |    4 +-
 tests/07changelevelintr |   60 +++++++++++++++++++++++++++++++
 tests/07layouts         |   91 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/07reshape5intr    |    2 +-
 5 files changed, 155 insertions(+), 3 deletions(-)

diff --git a/test b/test
index 09b17ce..e7d6e5f 100644
--- a/test
+++ b/test
@@ -161,6 +161,7 @@ no_errors() {
 # basic device test
 
 testdev() {
+   udevadm settle
    dev=$1
    cnt=$2
    dvsize=$3
diff --git a/tests/01raid6integ b/tests/01raid6integ
index ed7cec5..245b0da 100644
--- a/tests/01raid6integ
+++ b/tests/01raid6integ
@@ -7,10 +7,10 @@ layouts='ls rs la ra'
 lv=`uname -r`
 if expr $lv '>=' 2.6.30 > /dev/null
 then
-  layouts="$layouts parity-first dd-zero-restart ddf-N-restart ddf-N-continue \
+  layouts="$layouts parity-first ddf-zero-restart ddf-N-restart ddf-N-continue \
 	left-asymmetric-6 right-asymmetric-6 left-symmetric-6 right-symmetric-6 parity-first-6"
 fi
-echo $layouts
+
 for layout in $layouts
 do
   mdadm -CR $md0 -l6 --layout $layout -n5 $dev0 $dev1 $dev2 $dev3 $dev4
diff --git a/tests/07changelevelintr b/tests/07changelevelintr
new file mode 100644
index 0000000..d3faf2e
--- /dev/null
+++ b/tests/07changelevelintr
@@ -0,0 +1,60 @@
+
+#
+# test that we can stop and restart a level change.
+# just test a few in-place changes, and a few
+# size-reducing changes.
+
+
+checkgeo() {
+ # check the geometry of an array
+ # level raid_disks chunk_size layout
+ dev=$1
+ shift
+ sleep 0.5
+ check wait
+ for attr in level raid_disks chunk_size layout 
+ do
+   if [ $# -gt 0 ] ; then
+      val=$1
+      shift
+      if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ]
+      then echo "$attr doesn't match for $dev"
+           exit 1
+      fi
+   fi
+ done
+}
+
+restart() {
+ sleep 0.5
+ check reshape
+ mdadm -S $md0
+ mdadm -A $md0 $devs --backup-file=$bu
+ sleep 0.5
+ check reshape
+}
+
+bu=/tmp/md-backup
+rm -f $bu
+devs="$dev0 $dev1 $dev2 $dev3 $dev4"
+mdadm -CR $md0 -l5 -n5 -c 256 $devs
+checkgeo md0 raid5 5 $[256*1024] 2
+
+mdadm -G $md0 -c 128 --backup-file=$bu
+restart
+checkgeo md0 raid5 5 $[128*1024] 2
+
+mdadm -G $md0 --layout rs --backup-file=$bu
+restart
+checkgeo md0 raid5 5 $[128*1024] 3
+
+mdadm -G $md0 --array-size 59136
+mdadm -G $md0 --raid-disks 4 -c 64 --backup-file=$bu
+restart
+checkgeo md0 raid5 4 $[64*1024] 3
+
+devs="$dev0 $dev1 $dev2 $dev3"
+mdadm -G $md0 --array-size 19712
+mdadm -G $md0 -n 2 -c 256 --backup-file=$bu
+restart
+checkgeo md0 raid5 2 $[256*1024] 3
diff --git a/tests/07layouts b/tests/07layouts
new file mode 100644
index 0000000..c0c9ea0
--- /dev/null
+++ b/tests/07layouts
@@ -0,0 +1,91 @@
+
+# check that kernel an restripe interpret all the different layouts
+# the same
+# This involves changing the layout to each different possibility
+# while MDADM_GROW_VERIFY is set.
+
+testK=$[64*3*6]
+dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$testK
+export MDADM_GROW_VERITY=1
+
+
+dotest() {
+ sleep 0.5
+ check wait
+ testdev $md0 $1 $mdsize0 64 nd
+ blockdev --flushbufs $md0
+ cmp -s -n $[textK*1024] $md0 /tmp/RandFile || { echo cmp failed; exit 2; }
+ # write something new - shift chars 4 space
+ tr ' -~' '$-~ -#' < /tmp/RandFile > /tmp/RandFile2
+ mv /tmp/RandFile2 /tmp/RandFile
+ dd if=/tmp/RandFile of=$md0
+}
+
+checkgeo() {
+ # check the geometry of an array
+ # level raid_disks chunk_size layout
+ dev=$1
+ shift
+ sleep 0.5
+ check wait
+ for attr in level raid_disks chunk_size layout 
+ do
+   if [ $# -gt 0 ] ; then
+      val=$1
+      shift
+      if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ]
+      then echo "$attr doesn't match for $dev"
+           exit 1
+      fi
+   fi
+ done
+}
+   
+
+bu=/tmp/md-test-backup
+rm -f $bu
+
+# first a degraded 5 device raid5
+mdadm -CR $md0 -l5 -n5 $dev0 $dev1 missing $dev2 $dev3
+dd if=/tmp/RandFile of=$md0
+dotest 4
+
+l5[0]=la
+l5[1]=ra
+l5[2]=ls
+l5[3]=rs
+l5[4]=parity-first
+l5[5]=parity-last
+for layout in 0 1 2 3 4 5 0
+do
+ mdadm -G $md0 --layout=${l5[$layout]} --backup-file $bu
+ checkgeo md0 raid5 5 $[64*1024] $layout
+ dotest 4
+done
+
+mdadm -S $md0
+# now a doubly degraded raid6
+mdadm -CR $md0 -l6 -n5 $dev0 missing $dev2 missing $dev4
+dd if=/tmp/RandFile of=$md0
+dotest 3
+
+l6[0]=la
+l6[1]=ra
+l6[2]=ls
+l6[3]=rs
+l6[4]=parity-first
+l6[5]=parity-last
+l6[8]=ddf-zero-restart
+l6[9]=ddf-N-restart
+l6[10]=ddf-N-continue
+l6[16]=left-asymmetric-6
+l6[17]=right-asymmetric-6
+l6[18]=left-symmetric-6
+l6[19]=right-symmetric-6
+l6[20]=parity-first-6
+for layout in 0 1 2 3 4 5 8 9 10 16 17 18 19 20 0
+do
+ mdadm -G $md0 --layout=${l6[$layout]} --backup-file $bu
+ checkgeo md0 raid6 5 $[64*1024] $layout
+ dotest 3
+done
diff --git a/tests/07reshape5intr b/tests/07reshape5intr
index 96c8e02..b79d548 100644
--- a/tests/07reshape5intr
+++ b/tests/07reshape5intr
@@ -1,6 +1,6 @@
 
 #
-# test interrupting and restartign raid5 reshape.
+# test interrupting and restarting raid5 reshape.
 set -x
 devs="$dev1"
 st=UU